[fs/lustre-release.git] / lustre / utils / lfs.c

/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2017, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/utils/lfs.c
 *
 * Author: Peter J. Braam <braam@clusterfs.com>
 * Author: Phil Schwan <phil@clusterfs.com>
 * Author: Robert Read <rread@clusterfs.com>
 */

/* for O_DIRECTORY */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <getopt.h>
#include <string.h>
#include <mntent.h>
#include <unistd.h>
#include <errno.h>
#include <err.h>
#include <pwd.h>
#include <grp.h>
#include <sys/ioctl.h>
#include <sys/quota.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/xattr.h>
#include <fcntl.h>
#include <dirent.h>
#include <time.h>
#include <ctype.h>
#include <zlib.h>
#include <libgen.h>
#include <asm/byteorder.h>
#include "lfs_project.h"

#include <libcfs/util/string.h>
#include <libcfs/util/ioctl.h>
#include <libcfs/util/parser.h>
#include <lustre/lustreapi.h>
#include <linux/lustre/lustre_ver.h>
#include <linux/lustre/lustre_param.h>
#include <linux/lnet/nidstr.h>
#include <cyaml.h>

#ifndef ARRAY_SIZE
# define ARRAY_SIZE(a) ((sizeof(a)) / (sizeof((a)[0])))
#endif /* !ARRAY_SIZE */

/* all functions */
static int lfs_find(int argc, char **argv);
static int lfs_getstripe(int argc, char **argv);
static int lfs_getdirstripe(int argc, char **argv);
static int lfs_setdirstripe(int argc, char **argv);
static int lfs_rmentry(int argc, char **argv);
static int lfs_osts(int argc, char **argv);
static int lfs_mdts(int argc, char **argv);
static int lfs_df(int argc, char **argv);
static int lfs_getname(int argc, char **argv);
static int lfs_check(int argc, char **argv);
#ifdef HAVE_SYS_QUOTA_H
static int lfs_setquota(int argc, char **argv);
static int lfs_quota(int argc, char **argv);
static int lfs_project(int argc, char **argv);
#endif
static int lfs_flushctx(int argc, char **argv);
static int lfs_cp(int argc, char **argv);
static int lfs_ls(int argc, char **argv);
static int lfs_poollist(int argc, char **argv);
static int lfs_changelog(int argc, char **argv);
static int lfs_changelog_clear(int argc, char **argv);
static int lfs_fid2path(int argc, char **argv);
static int lfs_path2fid(int argc, char **argv);
static int lfs_data_version(int argc, char **argv);
static int lfs_hsm_state(int argc, char **argv);
static int lfs_hsm_set(int argc, char **argv);
static int lfs_hsm_clear(int argc, char **argv);
static int lfs_hsm_action(int argc, char **argv);
static int lfs_hsm_archive(int argc, char **argv);
static int lfs_hsm_restore(int argc, char **argv);
static int lfs_hsm_release(int argc, char **argv);
static int lfs_hsm_remove(int argc, char **argv);
static int lfs_hsm_cancel(int argc, char **argv);
static int lfs_swap_layouts(int argc, char **argv);
static int lfs_mv(int argc, char **argv);
static int lfs_ladvise(int argc, char **argv);
static int lfs_getsom(int argc, char **argv);
static int lfs_mirror(int argc, char **argv);
static int lfs_mirror_list_commands(int argc, char **argv);
static int lfs_list_commands(int argc, char **argv);
static inline int lfs_mirror_resync(int argc, char **argv);
static inline int lfs_mirror_verify(int argc, char **argv);
static inline int lfs_mirror_read(int argc, char **argv);
static inline int lfs_mirror_write(int argc, char **argv);
static inline int lfs_mirror_copy(int argc, char **argv);

enum setstripe_origin {
        SO_SETSTRIPE,
        SO_MIGRATE,
        SO_MIGRATE_MDT,
        SO_MIRROR_CREATE,
        SO_MIRROR_EXTEND,
        SO_MIRROR_SPLIT,
};
static int lfs_setstripe_internal(int argc, char **argv,
                                  enum setstripe_origin opc);

static inline int lfs_setstripe(int argc, char **argv)
{
        return lfs_setstripe_internal(argc, argv, SO_SETSTRIPE);
}
static inline int lfs_setstripe_migrate(int argc, char **argv)
{
        return lfs_setstripe_internal(argc, argv, SO_MIGRATE);
}
static inline int lfs_mirror_create(int argc, char **argv)
{
        return lfs_setstripe_internal(argc, argv, SO_MIRROR_CREATE);
}
static inline int lfs_mirror_extend(int argc, char **argv)
{
        return lfs_setstripe_internal(argc, argv, SO_MIRROR_EXTEND);
}
static inline int lfs_mirror_split(int argc, char **argv)
{
        return lfs_setstripe_internal(argc, argv, SO_MIRROR_SPLIT);
}

/* Setstripe and migrate share mostly the same parameters */
#define SSM_CMD_COMMON(cmd) \
        "usage: "cmd" [--component-end|-E <comp_end>]\n"                \
        "                 [--stripe-count|-c <stripe_count>]\n"         \
        "                 [--stripe-index|-i <start_ost_idx>]\n"        \
        "                 [--stripe-size|-S <stripe_size>]\n"           \
        "                 [--layout|-L <pattern>]\n"                    \
        "                 [--pool|-p <pool_name>]\n"                    \
        "                 [--ost|-o <ost_indices>]\n"                   \
        "                 [--yaml|-y <yaml_template_file>]\n"           \
        "                 [--copy=<lustre_src>]\n"

#define SSM_HELP_COMMON \
        "\tstripe_count: Number of OSTs to stripe over (0=fs default, -1 all)\n" \
        "\tstart_ost_idx: OST index of first stripe (-1=default round robin)\n"\
        "\tstripe_size:  Number of bytes on each OST (0=fs default)\n" \
        "\t              Can be specified with K, M or G (for KB, MB, GB\n" \
        "\t              respectively)\n"                               \
        "\tpool_name:    Name of OST pool to use (default none)\n"      \
        "\tlayout:       stripe pattern type: raid0, mdt (default raid0)\n"\
        "\tost_indices:  List of OST indices, can be repeated multiple times\n"\
        "\t              Indices be specified in a format of:\n"        \
        "\t                -o <ost_1>,<ost_i>-<ost_j>,<ost_n>\n"        \
        "\t              Or:\n"                                         \
        "\t                -o <ost_1> -o <ost_i>-<ost_j> -o <ost_n>\n"  \
        "\t              If --pool is set with --ost, then the OSTs\n"  \
        "\t              must be the members of the pool.\n"            \
        "\tcomp_end:     Extent end of component, start after previous end.\n"\
        "\t              Can be specified with K, M or G (for KB, MB, GB\n" \
        "\t              respectively, -1 for EOF). Must be a multiple of\n"\
        "\t              stripe_size.\n"                                      \
        "\tyaml_template_file:\n"                                             \
        "\t              YAML layout template file, can't be used with -c,\n" \
        "\t              -i, -S, -p, -o, or -E arguments.\n"                  \
        "\tlustre_src:   Lustre file/dir whose layout info is used to set\n"  \
        "\t              another lustre file or directory, can't used with\n" \
        "\t              -c, -i, -S, -p, -o, or -E arguments.\n"

#define MIRROR_CREATE_HELP                                                     \
        "\tmirror_count: Number of mirrors to be created with the upcoming\n"  \
        "\t              setstripe layout options\n"                           \
        "\t              It defaults to 1 if not specified; if specified,\n"   \
        "\t              it must follow the option without a space.\n"         \
        "\t              The option can also be repeated multiple times to\n"  \
        "\t              separate mirrors that have different layouts.\n"      \
        "\tsetstripe options: Mirror layout\n"                                 \
        "\t              It can be a plain layout or a composite layout.\n"    \
        "\t              If not specified, the stripe options inherited\n"     \
        "\t              from the previous component will be used.\n"          \
        "\tflags:        set flags to the component of the current mirror.\n"  \
        "\t              Only \"prefer\" flag is supported so far.\n"

#define MIRROR_EXTEND_HELP                                                     \
        MIRROR_CREATE_HELP                                                     \
        "\tvictim_file:  The layout of victim_file will be split and used\n"   \
        "\t              as a mirror added to the mirrored file.\n"            \
        "\tno-verify:    This option indicates not to verify the mirror(s)\n"  \
        "\t              from victim file(s) in case the victim file(s)\n"     \
        "\t              contains the same data as the original mirrored\n"    \
        "\t              file.\n"

#define MIRROR_EXTEND_USAGE                                                    \
        "                 <--mirror-count|-N[mirror_count]>\n"                 \
        "                 [setstripe options|-f <victim_file>]\n"              \
        "                 [--no-verify]\n"

#define SETSTRIPE_USAGE                                                 \
        SSM_CMD_COMMON("setstripe")                                     \
        MIRROR_EXTEND_USAGE                                             \
        "                 <directory|filename>\n"                       \
        SSM_HELP_COMMON                                                 \
        MIRROR_EXTEND_HELP

#define MIGRATE_USAGE                                                   \
        SSM_CMD_COMMON("migrate  ")                                     \
        "                 [--block|-b] [--non-block|-n]\n"              \
        "                 [--non-direct|-D] [--verbose|-v]\n"           \
        "                 <filename>\n"                                 \
        SSM_HELP_COMMON                                                 \
        "\n"                                                            \
        "\tblock:        Block file access during data migration (default)\n" \
        "\tnon-block:    Abort migrations if concurrent access is detected\n" \
        "\tnon-direct:   Do not use direct I/O to copy file contents\n" \
        "\tverbose:      Print each filename as it is migrated\n"       \

#define SETDIRSTRIPE_USAGE                                              \
        "               [--mdt-count|-c stripe_count>\n"                \
        "               [--mdt-hash|-H mdt_hash]\n"                     \
        "               [--mdt-index|-i mdt_index[,mdt_index,...]\n"    \
        "               [--default|-D] [--mode|-o mode] <dir>\n"        \
        "\tstripe_count: stripe count of the striped directory\n"       \
        "\tmdt_index: MDT index of first stripe\n"                      \
        "\tmdt_hash:  hash type of the striped directory. mdt types:\n" \
        "       fnv_1a_64 FNV-1a hash algorithm (default)\n"            \
        "       all_char  sum of characters % MDT_COUNT (not recommended)\n" \
        "\tdefault_stripe: set default dirstripe of the directory\n"    \
        "\tmode: the file access permission of the directory (octal)\n"

/**
 * command_t mirror_cmdlist - lfs mirror commands.
 */
command_t mirror_cmdlist[] = {
        { .pc_name = "create", .pc_func = lfs_mirror_create,
          .pc_help = "Create a mirrored file.\n"
                "usage: lfs mirror create "
                "<--mirror-count|-N[mirror_count]> "
                "[setstripe options] ... <filename|directory>\n"
          MIRROR_CREATE_HELP },
        { .pc_name = "extend", .pc_func = lfs_mirror_extend,
          .pc_help = "Extend a mirrored file.\n"
                "usage: lfs mirror extend "
                "<--mirror-count|-N[mirror_count]> [--no-verify] "
                "[setstripe options|-f <victim_file>] ... <filename>\n"
          MIRROR_EXTEND_HELP },
        { .pc_name = "split", .pc_func = lfs_mirror_split,
          .pc_help = "Split a mirrored file.\n"
        "usage: lfs mirror split <--mirror-id <mirror_id> | \n"
        "\t             <--component-id|-I <comp_id>> [--destroy|-d] \n"
        "\t             [-f <new_file>] <mirrored file>\n"
        "\tmirror_id:   The numerical unique identifier for a mirror. It\n"
        "\t             can be fetched by lfs getstripe command.\n"
        "\tcomp_id:     Unique component ID within a mirror.\n"
        "\tnew_file:    This option indicates the layout of the split\n"
        "\t             mirror will be stored into. If not specified,\n"
        "\t             a new file named <mirrored_file>.mirror~<mirror_id>\n"
        "\t             will be used.\n" },
        { .pc_name = "read", .pc_func = lfs_mirror_read,
          .pc_help = "Read the content of a specified mirror of a file.\n"
                "usage: lfs mirror read <--mirror-id|-N <mirror_id> "
                "[--outfile|-o <output_file>] <mirrored_file>\n" },
        { .pc_name = "write", .pc_func = lfs_mirror_write,
          .pc_help = "Write to a specified mirror of a file.\n"
                "usage: lfs mirror write <--mirror-id|-N <mirror_id> "
                "[--inputfile|-i <input_file>] <mirrored_file>\n" },
        { .pc_name = "copy", .pc_func = lfs_mirror_copy,
          .pc_help = "Copy a specified mirror to other mirror(s) of a file.\n"
                "usage: lfs mirror copy <--read-mirror|-i <id0>> "
                "<--write-mirror|-o <id1,id2>> <mirrored_file>\n" },
        { .pc_name = "resync", .pc_func = lfs_mirror_resync,
          .pc_help = "Resynchronizes out-of-sync mirrored file(s).\n"
                "usage: lfs mirror resync [--only <mirror_id[,...]>] "
                "<mirrored file> [<mirrored file2>...]\n"},
        { .pc_name = "verify", .pc_func = lfs_mirror_verify,
          .pc_help = "Verify mirrored file(s).\n"
                "usage: lfs mirror verify "
                "[--only <mirror_id,mirror_id2[,...]>] "
                "[--verbose|-v] <mirrored_file> [<mirrored_file2> ...]\n"},
        { .pc_name = "list-commands", .pc_func = lfs_mirror_list_commands,
          .pc_help = "list commands supported by lfs mirror"},
        { .pc_name = "help", .pc_func = Parser_help, .pc_help = "help" },
        { .pc_name = "exit", .pc_func = Parser_quit, .pc_help = "quit" },
        { .pc_name = "quit", .pc_func = Parser_quit, .pc_help = "quit" },
        { .pc_help = NULL }
};

/* all available commands */
command_t cmdlist[] = {
        {"setstripe", lfs_setstripe, 0,
         "To create a file with specified striping/composite layout, or\n"
         "create/replace the default layout on an existing directory:\n"
         SSM_CMD_COMMON("setstripe")
         "                 <directory|filename>\n"
         " or\n"
         "To add component(s) to an existing composite file:\n"
         SSM_CMD_COMMON("setstripe --component-add")
         SSM_HELP_COMMON
         "To totally delete the default striping from an existing directory:\n"
         "usage: setstripe -d <directory>\n"
         " or\n"
         "To create a mirrored file or set s default mirror layout on a directory:\n"
         "usage: setstripe -N[mirror_count] [STRIPE_OPTIONS] <directory|filename>\n"
         " or\n"
         "To delete the last component(s) from an existing composite file\n"
         "(note that this will also delete any data in those components):\n"
         "usage: setstripe --component-del [--component-id|-I <comp_id>]\n"
         "                               [--component-flags|-F <comp_flags>]\n"
         "                               <filename>\n"
         "\tcomp_id:     Unique component ID to delete\n"
         "\tcomp_flags:  'init' indicating all instantiated components\n"
         "\t             '^init' indicating all uninstantiated components\n"
         "\t-I and -F cannot be specified at the same time\n"},
        {"getstripe", lfs_getstripe, 0,
         "To list the layout pattern for a given file or files in a\n"
         "directory or recursively for all files in a directory tree.\n"
         "usage: getstripe [--ost|-O <uuid>] [--quiet|-q] [--verbose|-v]\n"
         "                 [--stripe-count|-c] [--stripe-index|-i] [--fid|-F]\n"
         "                 [--pool|-p] [--stripe-size|-S] [--directory|-d]\n"
         "                 [--mdt-index|-m] [--recursive|-r] [--raw|-R]\n"
         "                 [--layout|-L] [--generation|-g] [--yaml|-y]\n"
         "                 [--component-id[=comp_id]|-I[comp_id]]\n"
         "                 [--component-flags[=comp_flags]]\n"
         "                 [--component-count]\n"
         "                 [--component-start[=[+-]comp_start]]\n"
         "                 [--component-end[=[+-]comp_end]|-E[[+-]comp_end]]\n"
         "                 [[!] --mirror-index=[+-]<index> |\n"
         "                  [!] --mirror-id=[+-]<id>]\n"
         "                 <directory|filename> ..."},
        {"setdirstripe", lfs_setdirstripe, 0,
         "To create a striped directory on a specified MDT. This can only\n"
         "be done on MDT0 with the right of administrator.\n"
         "usage: setdirstripe [OPTION] <directory>\n"
         SETDIRSTRIPE_USAGE},
        {"getdirstripe", lfs_getdirstripe, 0,
         "To list the layout pattern info for a given directory\n"
         "or recursively for all directories in a directory tree.\n"
         "usage: getdirstripe [--mdt-count|-c] [--mdt-index|-m|-i]\n"
         "                    [--mdt-hash|-H] [--obd|-O <uuid>]\n"
         "                    [--recursive|-r] [--yaml|-y]\n"
         "                    [--default|-D] <dir> ..."},
        {"mkdir", lfs_setdirstripe, 0,
         "To create a striped directory on a specified MDT. This can only\n"
         "be done on MDT0 with the right of administrator.\n"
         "usage: mkdir [OPTION] <directory>\n"
         SETDIRSTRIPE_USAGE},
        {"rm_entry", lfs_rmentry, 0,
         "To remove the name entry of the remote directory. Note: This\n"
         "command will only delete the name entry, i.e. the remote directory\n"
         "will become inaccessable after this command. This can only be done\n"
         "by the administrator\n"
         "usage: rm_entry <dir>\n"},
        {"pool_list", lfs_poollist, 0,
         "List pools or pool OSTs\n"
         "usage: pool_list <fsname>[.<pool>] | <pathname>\n"},
        {"find", lfs_find, 0,
         "find files matching given attributes recursively in directory tree.\n"
         "usage: find <directory|filename> ...\n"
         "     [[!] --atime|-A [+-]N] [[!] --ctime|-C [+-]N]\n"
         "     [[!] --mtime|-M [+-]N] [--maxdepth|-D N] [[!] --blocks|-b N]\n"
         "     [[!] --name|-n <pattern>] [[!] --ost|-O <uuid|index,...>]\n"
         "     [--print|-P] [--print0|-0] [[!] --size|-s [+-]N[bkMGTPE]]\n"
         "     [[!] --stripe-count|-c [+-]<stripes>]\n"
         "     [[!] --stripe-index|-i <index,...>]\n"
         "     [[!] --stripe-size|-S [+-]N[kMGT]] [[!] --type|-t <filetype>]\n"
         "     [[!] --gid|-g|--group|-G <gid>|<gname>]\n"
         "     [[!] --uid|-u|--user|-U <uid>|<uname>] [[!] --pool <pool>]\n"
         "     [[!] --projid <projid>]\n"
         "     [[!] --layout|-L released,raid0,mdt]\n"
         "     [[!] --component-count [+-]<comp_cnt>]\n"
         "     [[!] --component-start [+-]N[kMGTPE]]\n"
         "     [[!] --component-end|-E [+-]N[kMGTPE]]\n"
         "     [[!] --component-flags <comp_flags>]\n"
         "     [[!] --mirror-count|-N [+-]<n>]\n"
         "     [[!] --mirror-state <[^]state>]\n"
         "     [[!] --mdt-count|-T [+-]<stripes>]\n"
         "     [[!] --mdt-hash|-H <hashtype>\n"
         "     [[!] --mdt-index|-m <uuid|index,...>]\n"
         "\t !: used before an option indicates 'NOT' requested attribute\n"
         "\t -: used before a value indicates less than requested value\n"
         "\t +: used before a value indicates more than requested value\n"
         "\thashtype:   hash type of the striped directory.\n"
         "\t            fnv_1a_64 FNV-1a hash algorithm\n"
         "\t            all_char  sum of characters % MDT_COUNT\n"},
        {"check", lfs_check, 0,
         "Display the status of MGTs, MDTs or OSTs (as specified in the command)\n"
         "or all the servers (MGTs, MDTs and OSTs).\n"
         "usage: check <mgts|osts|mdts|all>"},
        {"osts", lfs_osts, 0, "list OSTs connected to client "
         "[for specified path only]\n" "usage: osts [path]"},
        {"mdts", lfs_mdts, 0, "list MDTs connected to client "
         "[for specified path only]\n" "usage: mdts [path]"},
        {"df", lfs_df, 0,
         "report filesystem disk space usage or inodes usage"
         "of each MDS and all OSDs or a batch belonging to a specific pool .\n"
         "Usage: df [-i] [-h] [--lazy|-l] [--pool|-p <fsname>[.<pool>] [path]"},
        {"getname", lfs_getname, 0, "list instances and specified mount points "
         "[for specified path only]\n"
         "Usage: getname [-h]|[path ...] "},
#ifdef HAVE_SYS_QUOTA_H
        {"setquota", lfs_setquota, 0, "Set filesystem quotas.\n"
         "usage: setquota <-u|-g|-p> <uname>|<uid>|<gname>|<gid>|<projid>\n"
         "                -b <block-softlimit> -B <block-hardlimit>\n"
         "                -i <inode-softlimit> -I <inode-hardlimit> <filesystem>\n"
         "       setquota <-u|--user|-g|--group|-p|--projid> <uname>|<uid>|<gname>|<gid>|<projid>\n"
         "                [--block-softlimit <block-softlimit>]\n"
         "                [--block-hardlimit <block-hardlimit>]\n"
         "                [--inode-softlimit <inode-softlimit>]\n"
         "                [--inode-hardlimit <inode-hardlimit>] <filesystem>\n"
         "       setquota [-t] <-u|--user|-g|--group|-p|--projid>\n"
         "                [--block-grace <block-grace>]\n"
         "                [--inode-grace <inode-grace>] <filesystem>\n"
         "       setquota <-U|-G|-P>\n"
         "                -b <block-softlimit> -B <block-hardlimit>\n"
         "                -i <inode-softlimit> -I <inode-hardlimit> <filesystem>\n"
         "       setquota <-U|--default-usr|-G|--default-grp|-P|--default-prj>\n"
         "                [--block-softlimit <block-softlimit>]\n"
         "                [--block-hardlimit <block-hardlimit>]\n"
         "                [--inode-softlimit <inode-softlimit>]\n"
         "                [--inode-hardlimit <inode-hardlimit>] <filesystem>\n"
         "       setquota <-u|-g|-p> <uname>|<uid>|<gname>|<gid>|<projid>\n"
         "                <-d|--default>\n"
         "       -b can be used instead of --block-softlimit/--block-grace\n"
         "       -B can be used instead of --block-hardlimit\n"
         "       -i can be used instead of --inode-softlimit/--inode-grace\n"
         "       -I can be used instead of --inode-hardlimit\n"
         "       -d can be used instead of --default\n\n"
         "Note: The total quota space will be split into many qunits and\n"
         "      balanced over all server targets, the minimal qunit size is\n"
         "      1M bytes for block space and 1K inodes for inode space.\n\n"
         "      The maximum quota grace time is 2^48 - 1 seconds.\n\n"
         "      Quota space rebalancing process will stop when this mininum\n"
         "      value is reached. As a result, quota exceeded can be returned\n"
         "      while many targets still have 1MB or 1K inodes of spare\n"
         "      quota space."},
        {"quota", lfs_quota, 0, "Display disk usage and limits.\n"
         "usage: quota [-q] [-v] [-h] [-o <obd_uuid>|-i <mdt_idx>|-I "
                       "<ost_idx>]\n"
         "             [<-u|-g|-p> <uname>|<uid>|<gname>|<gid>|<projid>] <filesystem>\n"
         "       quota [-o <obd_uuid>|-i <mdt_idx>|-I <ost_idx>] -t <-u|-g|-p> <filesystem>\n"
        "        quota [-q] [-v] [h] <-U|-G|-P> <filesystem>"},
        {"project", lfs_project, 0,
         "Change or list project attribute for specified file or directory.\n"
         "usage: project [-d|-r] <file|directory...>\n"
         "         list project ID and flags on file(s) or directories\n"
         "       project [-p id] [-s] [-r] <file|directory...>\n"
         "         set project ID and/or inherit flag for specified file(s) or directories\n"
         "       project -c [-d|-r [-p id] [-0]] <file|directory...>\n"
         "         check project ID and flags on file(s) or directories, print outliers\n"
         "       project -C [-r] [-k] <file|directory...>\n"
         "         clear the project inherit flag and ID on the file or directory\n"
        },
#endif
        {"flushctx", lfs_flushctx, 0, "Flush security context for current user.\n"
         "usage: flushctx [-k] [mountpoint...]"},
        {"cp", lfs_cp, 0,
         "Remote user copy files and directories.\n"
         "usage: cp [OPTION]... [-T] SOURCE DEST\n\tcp [OPTION]... SOURCE... DIRECTORY\n\tcp [OPTION]... -t DIRECTORY SOURCE..."},
        {"ls", lfs_ls, 0,
         "Remote user list directory contents.\n"
         "usage: ls [OPTION]... [FILE]..."},
        {"changelog", lfs_changelog, 0,
         "Show the metadata changes on an MDT."
         "\nusage: changelog <mdtname> [startrec [endrec]]"},
        {"changelog_clear", lfs_changelog_clear, 0,
         "Indicate that old changelog records up to <endrec> are no longer of "
         "interest to consumer <id>, allowing the system to free up space.\n"
         "An <endrec> of 0 means all records.\n"
         "usage: changelog_clear <mdtname> <id> <endrec>"},
        {"fid2path", lfs_fid2path, 0,
         "Resolve the full path(s) for given FID(s). For a specific hardlink "
         "specify link number <linkno>.\n"
        /* "For a historical link name, specify changelog record <recno>.\n" */
         "usage: fid2path [--link <linkno>] <fsname|rootpath> <fid> ..."
                /* [ --rec <recno> ] */ },
        {"path2fid", lfs_path2fid, 0, "Display the fid(s) for a given path(s).\n"
         "usage: path2fid [--parents] <path> ..."},
        {"data_version", lfs_data_version, 0, "Display file data version for "
         "a given path.\n" "usage: data_version -[n|r|w] <path>"},
        {"hsm_state", lfs_hsm_state, 0, "Display the HSM information (states, "
         "undergoing actions) for given files.\n usage: hsm_state <file> ..."},
        {"hsm_set", lfs_hsm_set, 0, "Set HSM user flag on specified files.\n"
         "usage: hsm_set [--norelease] [--noarchive] [--dirty] [--exists] "
         "[--archived] [--lost] [--archive-id NUM] <file> ..."},
        {"hsm_clear", lfs_hsm_clear, 0, "Clear HSM user flag on specified "
         "files.\n"
         "usage: hsm_clear [--norelease] [--noarchive] [--dirty] [--exists] "
         "[--archived] [--lost] <file> ..."},
        {"hsm_action", lfs_hsm_action, 0, "Display current HSM request for "
         "given files.\n" "usage: hsm_action <file> ..."},
        {"hsm_archive", lfs_hsm_archive, 0,
         "Archive file to external storage.\n"
         "usage: hsm_archive [--filelist FILELIST] [--data DATA] [--archive NUM] "
         "<file> ..."},
        {"hsm_restore", lfs_hsm_restore, 0,
         "Restore file from external storage.\n"
         "usage: hsm_restore [--filelist FILELIST] [--data DATA] <file> ..."},
        {"hsm_release", lfs_hsm_release, 0,
         "Release files from Lustre.\n"
         "usage: hsm_release [--filelist FILELIST] [--data DATA] <file> ..."},
        {"hsm_remove", lfs_hsm_remove, 0,
         "Remove file copy from external storage.\n"
         "usage: hsm_remove [--filelist FILELIST] [--data DATA] "
         "[--archive NUM]\n"
         "                  (FILE [FILE ...] | "
         "--mntpath MOUNTPATH FID [FID ...])\n"
         "\n"
         "Note: To remove an archived copy of a file already deleted from a "
         "Lustre FS, the\n"
         "--mntpath option and a list of FIDs must be specified"
        },
        {"hsm_cancel", lfs_hsm_cancel, 0,
         "Cancel requests related to specified files.\n"
         "usage: hsm_cancel [--filelist FILELIST] [--data DATA] <file> ..."},
        {"swap_layouts", lfs_swap_layouts, 0, "Swap layouts between 2 files.\n"
         "usage: swap_layouts <path1> <path2>"},
        {"migrate", lfs_setstripe_migrate, 0,
         "migrate a directory between MDTs.\n"
         "usage: migrate [--mdt-count|-c] <stripe_count>\n"
         "               [--mdt-hash|-H] <hash_type>\n"
         "               [--mdt-index|-m] <start_mdt_index>\n"
         "               [--verbose|-v]\n"
         "               <directory>\n"
         "\tmdt:        MDTs to stripe over, if only one MDT is specified\n"
         "                      it's the MDT index of first stripe\n"
         "\tmdt_count:  number of MDTs to stripe a directory over\n"
         "\tmdt_hash:   hash type of the striped directory. mdt types:\n"
         "                      fnv_1a_64 FNV-1a hash algorithm (default)\n"
         "                      all_char  sum of characters % MDT_COUNT\n"
         "\n"
         "migrate file objects from one OST "
         "layout\nto another (may be not safe with concurent writes).\n"
         "usage: migrate  "
         "[--stripe-count|-c] <stripe_count>\n"
         "              [--stripe-index|-i] <start_ost_index>\n"
         "              [--stripe-size|-S] <stripe_size>\n"
         "              [--pool|-p] <pool_name>\n"
         "              [--ost|-o] <ost_indices>\n"
         "              [--block|-b]\n"
         "              [--non-block|-n]\n"
         "              [--non-direct|-D]\n"
         "              <file|directory>\n"
         "\tstripe_count:     number of OSTs to stripe a file over\n"
         "\tstripe_ost_index: index of the first OST to stripe a file over\n"
         "\tstripe_size:      number of bytes to store before moving to the next OST\n"
         "\tpool_name:        name of the predefined pool of OSTs\n"
         "\tost_indices:      OSTs to stripe over, in order\n"
         "\tblock:        Block file access during data migration (default)\n"
         "\tnon-block:    Abort migrations if concurrent access is detected\n"
         "\tnon-direct:       do not use direct I/O to copy file contents.\n"},
        {"mv", lfs_mv, 0,
         "To move directories between MDTs. This command is deprecated, "
         "use \"migrate\" instead.\n"
         "usage: mv <directory|filename> [--mdt-index|-m] <mdt_index> "
         "[--verbose|-v]\n"},
        {"ladvise", lfs_ladvise, 0,
         "Provide servers with advice about access patterns for a file.\n"
         "usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]\n"
         "               [--background|-b] [--unset|-u]\n\n"
         "               {[--end|-e END[kMGT]] | [--length|-l LENGTH[kMGT]]}\n"
         "               {[--mode|-m [READ,WRITE]}\n"
         "               <file> ...\n"},
        {"mirror", lfs_mirror, mirror_cmdlist,
         "lfs commands used to manage files with mirrored components:\n"
         "lfs mirror create - create a mirrored file or directory\n"
         "lfs mirror extend - add mirror(s) to an existing file\n"
         "lfs mirror split  - split a mirror from an existing mirrored file\n"
         "lfs mirror resync - resynchronize out-of-sync mirrored file(s)\n"
         "lfs mirror read   - read a mirror content of a mirrored file\n"
         "lfs mirror write  - write to a mirror of a mirrored file\n"
         "lfs mirror copy   - copy a mirror to other mirror(s) of a file\n"
         "lfs mirror verify - verify mirrored file(s)\n"},
        {"getsom", lfs_getsom, 0, "To list the SOM info for a given file.\n"
         "usage: getsom [-s] [-b] [-f] <path>\n"
         "\t-s: Only show the size value of the SOM data for a given file\n"
         "\t-b: Only show the blocks value of the SOM data for a given file\n"
         "\t-f: Only show the flags value of the SOM data for a given file\n"},
        {"help", Parser_help, 0, "help"},
        {"exit", Parser_quit, 0, "quit"},
        {"quit", Parser_quit, 0, "quit"},
        {"--version", Parser_version, 0,
         "output build version of the utility and exit"},
        {"--list-commands", lfs_list_commands, 0,
         "list commands supported by the utility and exit"},
        { 0, 0, 0, NULL }
};


static int check_hashtype(const char *hashtype)
{
        int i;

        for (i = LMV_HASH_TYPE_ALL_CHARS; i < LMV_HASH_TYPE_MAX; i++)
                if (strcmp(hashtype, mdt_hash_name[i]) == 0)
                        return i;

        return 0;
}


static const char *error_loc = "syserror";

enum {
        MIGRATION_NONBLOCK      = 0x0001,
        MIGRATION_MIRROR        = 0x0002,
        MIGRATION_NONDIRECT     = 0x0004,
        MIGRATION_VERBOSE       = 0x0008,
};

static int lfs_component_create(char *fname, int open_flags, mode_t open_mode,
                                struct llapi_layout *layout);

static int
migrate_open_files(const char *name, __u64 migration_flags,
                   const struct llapi_stripe_param *param,
                   struct llapi_layout *layout, int *fd_src, int *fd_tgt)
{
        int                      fd = -1;
        int                      fdv = -1;
        int                      rflags;
        int                      mdt_index;
        int                      random_value;
        char                     parent[PATH_MAX];
        char                     volatile_file[PATH_MAX];
        char                    *ptr;
        int                      rc;
        struct stat              st;
        struct stat              stv;

        if (param == NULL && layout == NULL) {
                error_loc = "layout information";
                return -EINVAL;
        }

        /* search for file directory pathname */
        if (strlen(name) > sizeof(parent) - 1) {
                error_loc = "source file name";
                return -ERANGE;
        }

        strncpy(parent, name, sizeof(parent));
        ptr = strrchr(parent, '/');
        if (ptr == NULL) {
                if (getcwd(parent, sizeof(parent)) == NULL) {
                        error_loc = "getcwd";
                        return -errno;
                }
        } else {
                if (ptr == parent) /* leading '/' */
                        ptr = parent + 1;
                *ptr = '\0';
        }

        /* open file, direct io */
        /* even if the file is only read, WR mode is nedeed to allow
         * layout swap on fd */
        rflags = O_RDWR;
        if (!(migration_flags & MIGRATION_NONDIRECT))
                rflags |= O_DIRECT;
        fd = open(name, rflags);
        if (fd < 0) {
                rc = -errno;
                error_loc = "cannot open source file";
                return rc;
        }

        rc = llapi_file_fget_mdtidx(fd, &mdt_index);
        if (rc < 0) {
                error_loc = "cannot get MDT index";
                goto out;
        }

        do {
                int open_flags = O_WRONLY | O_CREAT | O_EXCL | O_NOFOLLOW;
                mode_t open_mode = S_IRUSR | S_IWUSR;

                random_value = random();
                rc = snprintf(volatile_file, sizeof(volatile_file),
                              "%s/%s:%.4X:%.4X", parent, LUSTRE_VOLATILE_HDR,
                              mdt_index, random_value);
                if (rc >= sizeof(volatile_file)) {
                        rc = -ENAMETOOLONG;
                        break;
                }

                /* create, open a volatile file, use caching (ie no directio) */
                if (param != NULL)
                        fdv = llapi_file_open_param(volatile_file, open_flags,
                                                    open_mode, param);
                else
                        fdv = lfs_component_create(volatile_file, open_flags,
                                                   open_mode, layout);
        } while (fdv < 0 && (rc = fdv) == -EEXIST);

        if (rc < 0) {
                error_loc = "cannot create volatile file";
                goto out;
        }

        /* In case the MDT does not support creation of volatile files
         * we should try to unlink it. */
        (void)unlink(volatile_file);

        /* Not-owner (root?) special case.
         * Need to set owner/group of volatile file like original.
         * This will allow to pass related check during layout_swap.
         */
        rc = fstat(fd, &st);
        if (rc != 0) {
                rc = -errno;
                error_loc = "cannot stat source file";
                goto out;
        }

        rc = fstat(fdv, &stv);
        if (rc != 0) {
                rc = -errno;
                error_loc = "cannot stat volatile";
                goto out;
        }

        if (st.st_uid != stv.st_uid || st.st_gid != stv.st_gid) {
                rc = fchown(fdv, st.st_uid, st.st_gid);
                if (rc != 0) {
                        rc = -errno;
                        error_loc = "cannot change ownwership of volatile";
                        goto out;
                }
        }

out:
        if (rc < 0) {
                if (fd > 0)
                        close(fd);
                if (fdv > 0)
                        close(fdv);
        } else {
                *fd_src = fd;
                *fd_tgt = fdv;
                error_loc = NULL;
        }
        return rc;
}

static int migrate_copy_data(int fd_src, int fd_dst, int (*check_file)(int))
{
        struct llapi_layout *layout;
        size_t   buf_size = 4 * 1024 * 1024;
        void    *buf = NULL;
        ssize_t  rsize = -1;
        ssize_t  wsize = 0;
        size_t   rpos = 0;
        size_t   wpos = 0;
        off_t    bufoff = 0;
        int      rc;

        layout = llapi_layout_get_by_fd(fd_src, 0);
        if (layout != NULL) {
                uint64_t stripe_size;

                rc = llapi_layout_stripe_size_get(layout, &stripe_size);
                if (rc == 0)
                        buf_size = stripe_size;

                llapi_layout_free(layout);
        }

        /* Use a page-aligned buffer for direct I/O */
        rc = posix_memalign(&buf, getpagesize(), buf_size);
        if (rc != 0)
                return -rc;

        while (1) {
                /* read new data only if we have written all
                 * previously read data */
                if (wpos == rpos) {
                        if (check_file) {
                                rc = check_file(fd_src);
                                if (rc < 0)
                                        break;
                        }

                        rsize = read(fd_src, buf, buf_size);
                        if (rsize < 0) {
                                rc = -errno;
                                break;
                        }
                        rpos += rsize;
                        bufoff = 0;
                }
                /* eof ? */
                if (rsize == 0)
                        break;

                wsize = write(fd_dst, buf + bufoff, rpos - wpos);
                if (wsize < 0) {
                        rc = -errno;
                        break;
                }
                wpos += wsize;
                bufoff += wsize;
        }

        if (rc == 0) {
                rc = fsync(fd_dst);
                if (rc < 0)
                        rc = -errno;
        }

        free(buf);
        return rc;
}

static int migrate_copy_timestamps(int fd, int fdv)
{
        struct stat st;

        if (fstat(fd, &st) == 0) {
                struct timeval tv[2] = {
                        {.tv_sec = st.st_atime},
                        {.tv_sec = st.st_mtime}
                };

                return futimes(fdv, tv);
        }

        return -errno;
}

static int migrate_block(int fd, int fdv)
{
        __u64   dv1;
        int     gid;
        int     rc;
        int     rc2;

        rc = llapi_get_data_version(fd, &dv1, LL_DV_RD_FLUSH);
        if (rc < 0) {
                error_loc = "cannot get dataversion";
                return rc;
        }

        do
                gid = random();
        while (gid == 0);

        /* The grouplock blocks all concurrent accesses to the file.
         * It has to be taken after llapi_get_data_version as it would
         * block it too. */
        rc = llapi_group_lock(fd, gid);
        if (rc < 0) {
                error_loc = "cannot get group lock";
                return rc;
        }

        rc = migrate_copy_data(fd, fdv, NULL);
        if (rc < 0) {
                error_loc = "data copy failed";
                goto out_unlock;
        }

        /* Make sure we keep original atime/mtime values */
        rc = migrate_copy_timestamps(fd, fdv);
        if (rc < 0) {
                error_loc = "timestamp copy failed";
                goto out_unlock;
        }

        /* swap layouts
         * for a migration we need to check data version on file did
         * not change.
         *
         * Pass in gid=0 since we already own grouplock. */
        rc = llapi_fswap_layouts_grouplock(fd, fdv, dv1, 0, 0,
                                           SWAP_LAYOUTS_CHECK_DV1);
        if (rc == -EAGAIN) {
                error_loc = "file changed";
                goto out_unlock;
        } else if (rc < 0) {
                error_loc = "cannot swap layout";
                goto out_unlock;
        }

out_unlock:
        rc2 = llapi_group_unlock(fd, gid);
        if (rc2 < 0 && rc == 0) {
                error_loc = "unlock group lock";
                rc = rc2;
        }

        return rc;
}

/**
 * Internal helper for migrate_copy_data(). Check lease and report error if
 * need be.
 *
 * \param[in]  fd           File descriptor on which to check the lease.
 *
 * \retval 0       Migration can keep on going.
 * \retval -errno  Error occurred, abort migration.
 */
static int check_lease(int fd)
{
        int rc;

        rc = llapi_lease_check(fd);
        if (rc > 0)
                return 0; /* llapi_check_lease returns > 0 on success. */

        return -EBUSY;
}

static int migrate_nonblock(int fd, int fdv)
{
        __u64   dv1;
        __u64   dv2;
        int     rc;

        rc = llapi_get_data_version(fd, &dv1, LL_DV_RD_FLUSH);
        if (rc < 0) {
                error_loc = "cannot get data version";
                return rc;
        }

        rc = migrate_copy_data(fd, fdv, check_lease);
        if (rc < 0) {
                error_loc = "data copy failed";
                return rc;
        }

        rc = llapi_get_data_version(fd, &dv2, LL_DV_RD_FLUSH);
        if (rc != 0) {
                error_loc = "cannot get data version";
                return rc;
        }

        if (dv1 != dv2) {
                rc = -EAGAIN;
                error_loc = "source file changed";
                return rc;
        }

        /* Make sure we keep original atime/mtime values */
        rc = migrate_copy_timestamps(fd, fdv);
        if (rc < 0) {
                error_loc = "timestamp copy failed";
                return rc;
        }

        return 0;
}

static int lfs_component_set(char *fname, int comp_id,
                             __u32 flags, __u32 neg_flags)
{
        __u32 ids[2];
        __u32 flags_array[2];
        size_t count = 0;
        int rc;

        if (flags) {
                ids[count] = comp_id;
                flags_array[count] = flags;
                ++count;
        }

        if (neg_flags) {
                ids[count] = comp_id;
                flags_array[count] = neg_flags | LCME_FL_NEG;
                ++count;
        }

        rc = llapi_layout_file_comp_set(fname, ids, flags_array, count);
        if (rc)
                fprintf(stderr,
                        "%s: cannot change the flags of component '%#x' of file '%s': %x / ^(%x)\n",
                        progname, comp_id, fname, flags, neg_flags);

        return rc;
}

static int lfs_component_del(char *fname, __u32 comp_id,
                             __u32 flags, __u32 neg_flags)
{
        int     rc = 0;

        if (flags && neg_flags)
                return -EINVAL;

        if (!flags && neg_flags)
                flags = neg_flags | LCME_FL_NEG;

        if ((flags && comp_id) || (!flags && !comp_id))
                return -EINVAL;

        /* LCME_FL_INIT is the only supported flag in PFL */
        if (flags) {
                if (flags & ~LCME_KNOWN_FLAGS) {
                        fprintf(stderr,
                                "%s setstripe: unknown flags %#x\n",
                                progname, flags);
                        return -EINVAL;
                }
        } else if (comp_id > LCME_ID_MAX) {
                fprintf(stderr, "%s setstripe: invalid component id %u\n",
                        progname, comp_id);
                return -EINVAL;
        }

        rc = llapi_layout_file_comp_del(fname, comp_id, flags);
        if (rc)
                fprintf(stderr,
                        "%s setstripe: cannot delete component %#x from '%s': %s\n",
                        progname, comp_id, fname, strerror(errno));
        return rc;
}

static int lfs_component_add(char *fname, struct llapi_layout *layout)
{
        int     rc;

        if (layout == NULL)
                return -EINVAL;

        rc = llapi_layout_file_comp_add(fname, layout);
        if (rc)
                fprintf(stderr, "Add layout component(s) to %s failed. %s\n",
                        fname, strerror(errno));
        return rc;
}

static int lfs_component_create(char *fname, int open_flags, mode_t open_mode,
                                struct llapi_layout *layout)
{
        struct stat     st;
        int     fd;

        if (layout == NULL)
                return -EINVAL;

        fd = lstat(fname, &st);
        if (fd == 0 && S_ISDIR(st.st_mode))
                open_flags = O_DIRECTORY | O_RDONLY;

        fd = llapi_layout_file_open(fname, open_flags, open_mode, layout);
        if (fd < 0)
                fprintf(stderr, "%s: cannot %s '%s': %s\n", progname,
                        S_ISDIR(st.st_mode) ?
                                "set default composite layout for" :
                                "create composite file",
                        fname, strerror(errno));
        return fd;
}

static int lfs_migrate(char *name, __u64 migration_flags,
                       struct llapi_stripe_param *param,
                       struct llapi_layout *layout)
{
        int fd = -1;
        int fdv = -1;
        int rc;

        rc = migrate_open_files(name, migration_flags, param, layout,
                                &fd, &fdv);
        if (rc < 0)
                goto out;

        if (!(migration_flags & MIGRATION_NONBLOCK)) {
                /* Blocking mode (forced if servers do not support file lease).
                 * It is also the default mode, since we cannot distinguish
                 * between a broken lease and a server that does not support
                 * atomic swap/close (LU-6785) */
                rc = migrate_block(fd, fdv);
                goto out;
        }

        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
                error_loc = "cannot get lease";
                goto out;
        }

        rc = migrate_nonblock(fd, fdv);
        if (rc < 0) {
                llapi_lease_release(fd);
                goto out;
        }

        /* Atomically put lease, swap layouts and close.
         * for a migration we need to check data version on file did
         * not change. */
        rc = llapi_fswap_layouts(fd, fdv, 0, 0, SWAP_LAYOUTS_CLOSE);
        if (rc < 0) {
                error_loc = "cannot swap layout";
                goto out;
        }

out:
        if (fd >= 0)
                close(fd);

        if (fdv >= 0)
                close(fdv);

        if (rc < 0)
                fprintf(stderr, "error: %s: %s: %s: %s\n",
                        progname, name, error_loc, strerror(-rc));
        else if (migration_flags & MIGRATION_VERBOSE)
                printf("%s\n", name);

        return rc;
}

static int comp_str2flags(char *string, __u32 *flags, __u32 *neg_flags)
{
        char *name;

        if (string == NULL)
                return -EINVAL;

        *flags = 0;
        *neg_flags = 0;
        for (name = strtok(string, ","); name; name = strtok(NULL, ",")) {
                bool found = false;
                int i;

                for (i = 0; i < ARRAY_SIZE(comp_flags_table); i++) {
                        __u32 comp_flag = comp_flags_table[i].cfn_flag;
                        const char *comp_name = comp_flags_table[i].cfn_name;

                        if (strcmp(name, comp_name) == 0) {
                                *flags |= comp_flag;
                                found = true;
                        } else if (strncmp(name, "^", 1) == 0 &&
                                   strcmp(name + 1, comp_name) == 0) {
                                *neg_flags |= comp_flag;
                                found = true;
                        }
                }
                if (!found) {
                        llapi_printf(LLAPI_MSG_ERROR,
                                     "%s: component flag '%s' not supported\n",
                                     progname, name);
                        return -EINVAL;
                }
        }

        if (!*flags && !*neg_flags)
                return -EINVAL;

        /* don't allow to set and exclude the same flag */
        if (*flags & *neg_flags)
                return -EINVAL;

        return 0;
}

static int mirror_str2state(char *string, __u16 *state, __u16 *neg_state)
{
        if (string == NULL)
                return -EINVAL;

        *state = 0;
        *neg_state = 0;

        if (strncmp(string, "^", 1) == 0) {
                *neg_state = llapi_layout_string_flags(string + 1);
                if (*neg_state != 0)
                        return 0;
        } else {
                *state = llapi_layout_string_flags(string);
                if (*state != 0)
                        return 0;
        }

        llapi_printf(LLAPI_MSG_ERROR,
                     "%s: mirrored file state '%s' not supported\n",
                     progname, string);
        return -EINVAL;
}

/**
 * struct mirror_args - Command-line arguments for mirror(s).
 * @m_count:  Number of mirrors to be created with this layout.
 * @m_flags:  Mirror level flags, only 'prefer' is supported.
 * @m_layout: Mirror layout.
 * @m_file:   A victim file. Its layout will be split and used as a mirror.
 * @m_next:   Point to the next node of the list.
 *
 * Command-line arguments for mirror(s) will be parsed and stored in
 * a linked list that consists of this structure.
 */
struct mirror_args {
        __u32                   m_count;
        __u32                   m_flags;
        struct llapi_layout     *m_layout;
        const char              *m_file;
        struct mirror_args      *m_next;
};

static int mirror_sanity_check_flags(struct llapi_layout *layout, void *unused)
{
        uint32_t flags;
        int rc;

        rc = llapi_layout_comp_flags_get(layout, &flags);
        if (rc)
                return -errno;

        if (flags & LCME_FL_NEG) {
                fprintf(stderr, "error: %s: negative flags are not supported\n",
                        progname);
                return -EINVAL;
        }

        if (flags & LCME_FL_STALE) {
                fprintf(stderr, "error: %s: setting '%s' is not supported\n",
                        progname, comp_flags_table[LCME_FL_STALE].cfn_name);
                return -EINVAL;
        }

        return LLAPI_LAYOUT_ITER_CONT;
}

static inline int mirror_sanity_check_one(struct llapi_layout *layout)
{
        uint64_t start, end;
        uint64_t pattern;
        int rc;

        /* LU-10112: do not support dom+flr in phase 1 */
        rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
        if (rc)
                return -errno;

        rc = llapi_layout_pattern_get(layout, &pattern);
        if (rc)
                return -errno;

        if (pattern == LOV_PATTERN_MDT || pattern == LLAPI_LAYOUT_MDT) {
                fprintf(stderr, "error: %s: doesn't support dom+flr for now\n",
                        progname);
                return -ENOTSUP;
        }

        rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_LAST);
        if (rc)
                return -errno;

        rc = llapi_layout_comp_extent_get(layout, &start, &end);
        if (rc)
                return -errno;

        if (end != LUSTRE_EOF) {
                fprintf(stderr, "error: %s: mirror layout doesn't reach eof\n",
                        progname);
                return -EINVAL;
        }

        rc = llapi_layout_comp_iterate(layout, mirror_sanity_check_flags, NULL);
        return rc;
}

/**
 * enum mirror_flags - Flags for extending a mirrored file.
 * @MF_NO_VERIFY: Indicates not to verify the mirror(s) from victim file(s)
 *             in case the victim file(s) contains the same data as the
 *             original mirrored file.
 * @MF_DESTROY: Indicates to delete the mirror from the mirrored file.
 * @MF_COMP_ID: specified component id instead of mirror id
 *
 * Flags for extending a mirrored file.
 */
enum mirror_flags {
        MF_NO_VERIFY    = 0x1,
        MF_DESTROY      = 0x2,
        MF_COMP_ID      = 0x4,
};

/**
 * mirror_create_sanity_check() - Check mirror list.
 * @list:  A linked list that stores the mirror arguments.
 *
 * This function does a sanity check on @list for creating
 * a mirrored file.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static int mirror_create_sanity_check(const char *fname,
                                      struct mirror_args *list)
{
        int rc = 0;
        bool has_m_file = false;
        bool has_m_layout = false;

        if (list == NULL)
                return -EINVAL;

        if (fname) {
                struct llapi_layout *layout;

                layout = llapi_layout_get_by_path(fname, 0);
                if (!layout) {
                        fprintf(stderr,
                                "error: %s: file '%s' couldn't get layout\n",
                                progname, fname);
                        return -ENODATA;
                }

                rc = mirror_sanity_check_one(layout);
                llapi_layout_free(layout);

                if (rc)
                        return rc;
        }

        while (list != NULL) {
                if (list->m_file != NULL) {
                        has_m_file = true;
                        llapi_layout_free(list->m_layout);

                        list->m_layout =
                                llapi_layout_get_by_path(list->m_file, 0);
                        if (list->m_layout == NULL) {
                                fprintf(stderr,
                                        "error: %s: file '%s' has no layout\n",
                                        progname, list->m_file);
                                return -ENODATA;
                        }
                } else {
                        has_m_layout = true;
                        if (list->m_layout == NULL) {
                                fprintf(stderr, "error: %s: no mirror layout\n",
                                        progname);
                                return -EINVAL;
                        }
                }

                rc = mirror_sanity_check_one(list->m_layout);
                if (rc)
                        return rc;

                list = list->m_next;
        }

        if (has_m_file && has_m_layout) {
                fprintf(stderr,
                        "error: %s: -f <victim_file> option should not be specified with setstripe options\n",
                        progname);
                return -EINVAL;
        }

        return 0;
}

static int mirror_set_flags(struct llapi_layout *layout, void *cbdata)
{
        __u32 mirror_flags = *(__u32 *)cbdata;
        uint32_t flags;
        int rc;

        rc = llapi_layout_comp_flags_get(layout, &flags);
        if (rc < 0)
                return rc;

        if (!flags) {
                rc = llapi_layout_comp_flags_set(layout, mirror_flags);
                if (rc)
                        return rc;
        }

        return LLAPI_LAYOUT_ITER_CONT;
}

/**
 * mirror_create() - Create a mirrored file.
 * @fname:        The file to be created.
 * @mirror_list:  A linked list that stores the mirror arguments.
 *
 * This function creates a mirrored file @fname with the mirror(s)
 * from @mirror_list.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static int mirror_create(char *fname, struct mirror_args *mirror_list)
{
        struct llapi_layout *layout = NULL;
        struct mirror_args *cur_mirror = NULL;
        uint16_t mirror_count = 0;
        int i = 0;
        int rc = 0;

        rc = mirror_create_sanity_check(NULL, mirror_list);
        if (rc)
                return rc;

        cur_mirror = mirror_list;
        while (cur_mirror != NULL) {
                rc = llapi_layout_comp_iterate(cur_mirror->m_layout,
                                               mirror_set_flags,
                                               &cur_mirror->m_flags);
                if (rc) {
                        rc = -errno;
                        fprintf(stderr, "%s: failed to set mirror flags\n",
                                progname);
                        goto error;
                }

                for (i = 0; i < cur_mirror->m_count; i++) {
                        rc = llapi_layout_merge(&layout, cur_mirror->m_layout);
                        if (rc) {
                                rc = -errno;
                                fprintf(stderr, "error: %s: "
                                        "merge layout failed: %s\n",
                                        progname, strerror(errno));
                                goto error;
                        }
                }
                mirror_count += cur_mirror->m_count;
                cur_mirror = cur_mirror->m_next;
        }

        if (layout == NULL) {
                fprintf(stderr, "error: %s: layout is NULL\n", progname);
                return -EINVAL;
        }

        rc = llapi_layout_mirror_count_set(layout, mirror_count);
        if (rc) {
                rc = -errno;
                fprintf(stderr, "error: %s: set mirror count failed: %s\n",
                        progname, strerror(errno));
                goto error;
        }

        rc = lfs_component_create(fname, O_CREAT | O_WRONLY, 0666,
                                  layout);
        if (rc >= 0) {
                close(rc);
                rc = 0;
        }

error:
        llapi_layout_free(layout);
        return rc;
}

/**
 * Compare files and check lease on @fd.
 *
 * \retval bytes number of bytes are the same
 */
static ssize_t mirror_file_compare(int fd, int fdv)
{
        const size_t buflen = 4 * 1024 * 1024; /* 4M */
        void *buf;
        ssize_t bytes_done = 0;
        ssize_t bytes_read = 0;

        buf = malloc(buflen * 2);
        if (!buf)
                return -ENOMEM;

        while (1) {
                if (!llapi_lease_check(fd)) {
                        bytes_done = -EBUSY;
                        break;
                }

                bytes_read = read(fd, buf, buflen);
                if (bytes_read <= 0)
                        break;

                if (bytes_read != read(fdv, buf + buflen, buflen))
                        break;

                /* XXX: should compute the checksum on each buffer and then
                 * compare checksum to avoid cache collision */
                if (memcmp(buf, buf + buflen, bytes_read))
                        break;

                bytes_done += bytes_read;
        }

        free(buf);

        return bytes_done;
}

static int mirror_extend_file(const char *fname, const char *victim_file,
                              enum mirror_flags mirror_flags)
{
        int fd = -1;
        int fdv = -1;
        struct stat stbuf;
        struct stat stbuf_v;
        struct ll_ioc_lease *data = NULL;
        int rc;

        fd = open(fname, O_RDWR);
        if (fd < 0) {
                error_loc = "open source file";
                rc = -errno;
                goto out;
        }

        fdv = open(victim_file, O_RDWR);
        if (fdv < 0) {
                error_loc = "open target file";
                rc = -errno;
                goto out;
        }

        if (fstat(fd, &stbuf) || fstat(fdv, &stbuf_v)) {
                error_loc = "stat source or target file";
                rc = -errno;
                goto out;
        }

        if (stbuf.st_dev != stbuf_v.st_dev) {
                error_loc = "stat source and target file";
                rc = -EXDEV;
                goto out;
        }

        /* mirrors should be of the same size */
        if (stbuf.st_size != stbuf_v.st_size) {
                error_loc = "file sizes don't match";
                rc = -EINVAL;
                goto out;
        }

        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
                error_loc = "cannot get lease";
                goto out;
        }

        if (!(mirror_flags & MF_NO_VERIFY)) {
                ssize_t ret;
                /* mirrors should have the same contents */
                ret = mirror_file_compare(fd, fdv);
                if (ret != stbuf.st_size) {
                        error_loc = "file busy or contents don't match";
                        rc = ret < 0 ? ret : -EINVAL;
                        goto out;
                }
        }

        /* Get rid of caching pages from clients */
        rc = llapi_file_flush(fd);
        if (rc < 0) {
                error_loc = "cannot get data version";
                goto out;
        }

        rc = llapi_file_flush(fdv);
        if (rc < 0) {
                error_loc = "cannot get data version";
                goto out;

        }

        /* Make sure we keep original atime/mtime values */
        rc = migrate_copy_timestamps(fd, fdv);
        if (rc < 0) {
                error_loc = "cannot copy timestamp";
                goto out;
        }

        /* Atomically put lease, merge layouts and close. */
        data = calloc(1, offsetof(typeof(*data), lil_ids[1]));
        if (!data) {
                error_loc = "memory allocation";
                goto out;
        }
        data->lil_mode = LL_LEASE_UNLCK;
        data->lil_flags = LL_LEASE_LAYOUT_MERGE;
        data->lil_count = 1;
        data->lil_ids[0] = fdv;
        rc = llapi_lease_set(fd, data);
        if (rc < 0) {
                error_loc = "cannot merge layout";
                goto out;
        } else if (rc == 0) {
                rc = -EBUSY;
                error_loc = "lost lease lock";
                goto out;
        }
        rc = 0;

out:
        if (data)
                free(data);
        if (fd >= 0)
                close(fd);
        if (fdv >= 0)
                close(fdv);
        if (!rc)
                (void) unlink(victim_file);
        if (rc < 0)
                fprintf(stderr, "error: %s: %s: %s: %s\n",
                        progname, fname, error_loc, strerror(-rc));
        return rc;
}

static int mirror_extend_layout(char *name, struct llapi_layout *layout)
{
        struct ll_ioc_lease *data = NULL;
        int fd = -1;
        int fdv = -1;
        int rc;

        rc = migrate_open_files(name, 0, NULL, layout, &fd, &fdv);
        if (rc < 0)
                goto out;

        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
                error_loc = "cannot get lease";
                goto out;
        }

        rc = migrate_nonblock(fd, fdv);
        if (rc < 0) {
                llapi_lease_release(fd);
                goto out;
        }

        /* Atomically put lease, merge layouts and close. */
        data = calloc(1, offsetof(typeof(*data), lil_ids[1]));
        if (!data) {
                error_loc = "memory allocation";
                goto out;
        }
        data->lil_mode = LL_LEASE_UNLCK;
        data->lil_flags = LL_LEASE_LAYOUT_MERGE;
        data->lil_count = 1;
        data->lil_ids[0] = fdv;
        rc = llapi_lease_set(fd, data);
        if (rc < 0) {
                error_loc = "cannot merge layout";
                goto out;
        } else if (rc == 0) {
                rc = -EBUSY;
                error_loc = "lost lease lock";
                goto out;
        }
        rc = 0;

out:
        if (data)
                free(data);
        if (fd >= 0)
                close(fd);
        if (fdv >= 0)
                close(fdv);
        if (rc < 0)
                fprintf(stderr, "error: %s: %s: %s: %s\n",
                        progname, name, error_loc, strerror(-rc));
        return rc;
}

static int mirror_extend(char *fname, struct mirror_args *mirror_list,
                         enum mirror_flags mirror_flags)
{
        int rc;

        rc = mirror_create_sanity_check(fname, mirror_list);
        if (rc)
                return rc;

        while (mirror_list) {
                if (mirror_list->m_file != NULL) {
                        rc = mirror_extend_file(fname, mirror_list->m_file,
                                                mirror_flags);
                } else {
                        __u32 mirror_count = mirror_list->m_count;

                        while (mirror_count > 0) {
                                rc = mirror_extend_layout(fname,
                                                        mirror_list->m_layout);
                                if (rc)
                                        break;

                                --mirror_count;
                        }
                }
                if (rc)
                        break;

                mirror_list = mirror_list->m_next;
        }

        return rc;
}

static int find_mirror_id(struct llapi_layout *layout, void *cbdata)
{
        uint32_t id;
        int rc;

        rc = llapi_layout_mirror_id_get(layout, &id);
        if (rc < 0)
                return rc;

        if ((__u16)id == *(__u16 *)cbdata)
                return LLAPI_LAYOUT_ITER_STOP;

        return LLAPI_LAYOUT_ITER_CONT;
}

static int find_comp_id(struct llapi_layout *layout, void *cbdata)
{
        uint32_t id;
        int rc;

        rc = llapi_layout_comp_id_get(layout, &id);
        if (rc < 0)
                return rc;

        if (id == *(__u32 *)cbdata)
                return LLAPI_LAYOUT_ITER_STOP;

        return LLAPI_LAYOUT_ITER_CONT;
}
static int mirror_split(const char *fname, __u32 id,
                        enum mirror_flags mflags, const char *victim_file)
{
        struct llapi_layout *layout;
        char parent[PATH_MAX];
        char victim[PATH_MAX];
        int flags = O_CREAT | O_EXCL | O_LOV_DELAY_CREATE | O_NOFOLLOW;
        char *ptr;
        struct ll_ioc_lease *data;
        uint16_t mirror_count;
        int mdt_index;
        int fd, fdv;
        int rc;

        /* check fname contains mirror with mirror_id/comp_id */
        layout = llapi_layout_get_by_path(fname, 0);
        if (!layout) {
                fprintf(stderr,
                        "error %s: file '%s' couldn't get layout\n",
                        progname, fname);
                return -EINVAL;
        }

        rc = mirror_sanity_check_one(layout);
        if (rc)
                goto free_layout;

        rc = llapi_layout_mirror_count_get(layout, &mirror_count);
        if (rc) {
                fprintf(stderr,
                        "error %s: file '%s' couldn't get mirror count\n",
                        progname, fname);
                goto free_layout;
        }
        if (mirror_count < 2) {
                fprintf(stderr,
                        "error %s: file '%s' has %d component, cannot split\n",
                        progname, fname, mirror_count);
                goto free_layout;
        }

        if (mflags & MF_COMP_ID) {
                rc = llapi_layout_comp_iterate(layout, find_comp_id, &id);
                id = mirror_id_of(id);
        } else {
                rc = llapi_layout_comp_iterate(layout, find_mirror_id, &id);
        }
        if (rc < 0) {
                fprintf(stderr, "error %s: failed to iterate layout of '%s'\n",
                        progname, fname);
                goto free_layout;
        } else if (rc == LLAPI_LAYOUT_ITER_CONT) {
                fprintf(stderr,
                     "error %s: file '%s' does not contain mirror with id %u\n",
                        progname, fname, id);
                goto free_layout;
        }

        fd = open(fname, O_RDWR);
        if (fd < 0) {
                fprintf(stderr,
                        "error %s: open file '%s' failed: %s\n",
                        progname, fname, strerror(errno));
                goto free_layout;
        }

        /* get victim file directory pathname */
        if (strlen(fname) > sizeof(parent) - 1) {
                fprintf(stderr, "error %s: file name of '%s' too long\n",
                        progname, fname);
                rc = -ERANGE;
                goto close_fd;
        }
        strncpy(parent, fname, sizeof(parent));
        ptr = strrchr(parent, '/');
        if (ptr == NULL) {
                if (getcwd(parent, sizeof(parent)) == NULL) {
                        fprintf(stderr, "error %s: getcwd failed: %s\n",
                                progname, strerror(errno));
                        rc = -errno;
                        goto close_fd;
                }
        } else {
                if (ptr == parent)
                        ptr = parent + 1;
                *ptr = '\0';
        }

        rc = llapi_file_fget_mdtidx(fd, &mdt_index);
        if (rc < 0) {
                fprintf(stderr, "%s: cannot get MDT index of '%s'\n",
                        progname, fname);
                goto close_fd;
        }

        if (victim_file == NULL) {
                /* use a temp file to store the splitted layout */
                if (mflags & MF_DESTROY) {
                        fdv = llapi_create_volatile_idx(parent, mdt_index,
                                                        O_LOV_DELAY_CREATE);
                } else {
                        snprintf(victim, sizeof(victim), "%s.mirror~%u",
                                 fname, id);
                        fdv = open(victim, flags, S_IRUSR | S_IWUSR);
                }
        } else {
                /* user specified victim file */
                fdv = open(victim_file, flags, S_IRUSR | S_IWUSR);
        }

        if (fdv < 0) {
                fprintf(stderr,
                        "error %s: create victim file failed: %s\n",
                        progname, strerror(errno));
                goto close_fd;
        }

        /* get lease lock of fname */
        rc = llapi_lease_acquire(fd, LL_LEASE_WRLCK);
        if (rc < 0) {
                fprintf(stderr,
                        "error %s: cannot get lease of file '%s': %d\n",
                        progname, fname, rc);
                goto close_victim;
        }

        /* Atomatically put lease, split layouts and close. */
        data = malloc(offsetof(typeof(*data), lil_ids[2]));
        if (!data) {
                rc = -ENOMEM;
                goto close_victim;
        }

        data->lil_mode = LL_LEASE_UNLCK;
        data->lil_flags = LL_LEASE_LAYOUT_SPLIT;
        data->lil_count = 2;
        data->lil_ids[0] = fdv;
        data->lil_ids[1] = id;
        rc = llapi_lease_set(fd, data);
        if (rc <= 0) {
                if (rc == 0) /* lost lease lock */
                        rc = -EBUSY;
                fprintf(stderr,
                        "error %s: cannot split '%s': %s\n",
                        progname, fname, strerror(-rc));
        } else {
                rc = 0;
        }
        free(data);

close_victim:
        close(fdv);
close_fd:
        close(fd);
free_layout:
        llapi_layout_free(layout);
        return rc;
}

/**
 * Parse a string containing an target index list into an array of integers.
 *
 * The input string contains a comma delimited list of individual
 * indices and ranges, for example "1,2-4,7". Add the indices into the
 * \a tgts array and remove duplicates.
 *
 * \param[out] tgts    array to store indices in
 * \param[in] size     size of \a tgts array
 * \param[in] offset   starting index in \a tgts
 * \param[in] arg      string containing OST index list
 *
 * \retval positive    number of indices in \a tgts
 * \retval -EINVAL     unable to parse \a arg
 */
static int parse_targets(__u32 *tgts, int size, int offset, char *arg)
{
        int rc;
        int nr = offset;
        int slots = size - offset;
        char *ptr = NULL;
        bool end_of_loop;

        if (arg == NULL)
                return -EINVAL;

        end_of_loop = false;
        while (!end_of_loop) {
                int start_index;
                int end_index;
                int i;
                char *endptr = NULL;

                rc = -EINVAL;

                ptr = strchrnul(arg, ',');

                end_of_loop = *ptr == '\0';
                *ptr = '\0';

                start_index = strtol(arg, &endptr, 0);
                if (endptr == arg) /* no data at all */
                        break;
                if (*endptr != '-' && *endptr != '\0') /* has invalid data */
                        break;

                end_index = start_index;
                if (*endptr == '-') {
                        end_index = strtol(endptr + 1, &endptr, 0);
                        if (*endptr != '\0')
                                break;
                        if (end_index < start_index)
                                break;
                }

                for (i = start_index; i <= end_index && slots > 0; i++) {
                        int j;

                        /* remove duplicate */
                        for (j = 0; j < offset; j++) {
                                if (tgts[j] == i)
                                        break;
                        }
                        if (j == offset) { /* no duplicate */
                                tgts[nr++] = i;
                                --slots;
                        }
                }
                if (slots == 0 && i < end_index)
                        break;

                *ptr = ',';
                arg = ++ptr;
                offset = nr;
                rc = 0;
        }
        if (!end_of_loop && ptr != NULL)
                *ptr = ',';

        return rc < 0 ? rc : nr;
}

struct lfs_setstripe_args {
        unsigned long long       lsa_comp_end;
        unsigned long long       lsa_stripe_size;
        long long                lsa_stripe_count;
        long long                lsa_stripe_off;
        __u32                    lsa_comp_flags;
        __u32                    lsa_comp_neg_flags;
        unsigned long long       lsa_pattern;
        unsigned int             lsa_mirror_count;
        int                      lsa_nr_tgts;
        bool                     lsa_first_comp;
        __u32                   *lsa_tgts;
        char                    *lsa_pool_name;
};

static inline void setstripe_args_init(struct lfs_setstripe_args *lsa)
{
        unsigned int mirror_count = lsa->lsa_mirror_count;
        bool first_comp = lsa->lsa_first_comp;

        memset(lsa, 0, sizeof(*lsa));

        lsa->lsa_stripe_size = LLAPI_LAYOUT_DEFAULT;
        lsa->lsa_stripe_count = LLAPI_LAYOUT_DEFAULT;
        lsa->lsa_stripe_off = LLAPI_LAYOUT_DEFAULT;
        lsa->lsa_pattern = LLAPI_LAYOUT_RAID0;
        lsa->lsa_pool_name = NULL;

        lsa->lsa_mirror_count = mirror_count;
        lsa->lsa_first_comp = first_comp;
}

/**
 * setstripe_args_init_inherit() - Initialize and inherit stripe options.
 * @lsa: Stripe options to be initialized and inherited.
 *
 * This function initializes stripe options in @lsa and inherit
 * stripe_size, stripe_count and OST pool_name options.
 *
 * Return: void.
 */
static inline void setstripe_args_init_inherit(struct lfs_setstripe_args *lsa)
{
        unsigned long long stripe_size;
        long long stripe_count;
        char *pool_name = NULL;

        stripe_size = lsa->lsa_stripe_size;
        stripe_count = lsa->lsa_stripe_count;
        pool_name = lsa->lsa_pool_name;

        setstripe_args_init(lsa);

        lsa->lsa_stripe_size = stripe_size;
        lsa->lsa_stripe_count = stripe_count;
        lsa->lsa_pool_name = pool_name;
}

static inline bool setstripe_args_specified(struct lfs_setstripe_args *lsa)
{
        return (lsa->lsa_stripe_size != LLAPI_LAYOUT_DEFAULT ||
                lsa->lsa_stripe_count != LLAPI_LAYOUT_DEFAULT ||
                lsa->lsa_stripe_off != LLAPI_LAYOUT_DEFAULT ||
                lsa->lsa_pattern != LLAPI_LAYOUT_RAID0 ||
                lsa->lsa_pool_name != NULL ||
                lsa->lsa_comp_end != 0);
}

/**
 * comp_args_to_layout() - Create or extend a composite layout.
 * @composite:       Pointer to the composite layout.
 * @lsa:             Stripe options for the new component.
 *
 * This function creates or extends a composite layout by adding a new
 * component with stripe options from @lsa.
 *
 * Return: 0 on success or an error code on failure.
 */
static int comp_args_to_layout(struct llapi_layout **composite,
                               struct lfs_setstripe_args *lsa,
                               bool set_extent)
{
        struct llapi_layout *layout = *composite;
        uint64_t prev_end = 0;
        int i = 0, rc;

        if (layout == NULL) {
                layout = llapi_layout_alloc();
                if (layout == NULL) {
                        fprintf(stderr, "Alloc llapi_layout failed. %s\n",
                                strerror(errno));
                        return -ENOMEM;
                }
                *composite = layout;
        } else {
                uint64_t start;

                /* Get current component extent, current component
                 * must be the tail component. */
                rc = llapi_layout_comp_extent_get(layout, &start, &prev_end);
                if (rc) {
                        fprintf(stderr, "Get comp extent failed. %s\n",
                                strerror(errno));
                        return rc;
                }

                if (lsa->lsa_first_comp)
                        prev_end = 0;

                if (lsa->lsa_first_comp)
                        rc = llapi_layout_add_first_comp(layout);
                else
                        rc = llapi_layout_comp_add(layout);
                if (rc) {
                        fprintf(stderr, "Add component failed. %s\n",
                                strerror(errno));
                        return rc;
                }
        }
        /* reset lsa_first_comp */
        lsa->lsa_first_comp = false;

        if (set_extent) {
                rc = llapi_layout_comp_extent_set(layout, prev_end,
                                                  lsa->lsa_comp_end);
                if (rc) {
                        fprintf(stderr, "Set extent [%lu, %llu) failed. %s\n",
                                prev_end, lsa->lsa_comp_end, strerror(errno));
                        return rc;
                }
        }

        /* Data-on-MDT component setting */
        if (lsa->lsa_pattern == LLAPI_LAYOUT_MDT) {
                /* In case of Data-on-MDT patterns the only extra option
                 * applicable is stripe size option. */
                if (lsa->lsa_stripe_count != LLAPI_LAYOUT_DEFAULT) {
                        fprintf(stderr, "Option 'stripe-count' can't be "
                                "specified with Data-on-MDT component: %lld\n",
                                lsa->lsa_stripe_count);
                        return -EINVAL;
                }
                if (lsa->lsa_stripe_size != LLAPI_LAYOUT_DEFAULT) {
                        fprintf(stderr, "Option 'stripe-size' can't be "
                                "specified with Data-on-MDT component: %llu\n",
                                lsa->lsa_stripe_size);
                        return -EINVAL;
                }
                if (lsa->lsa_nr_tgts != 0) {
                        fprintf(stderr, "Option 'ost-list' can't be specified "
                                "with Data-on-MDT component: '%i'\n",
                                lsa->lsa_nr_tgts);
                        return -EINVAL;
                }
                if (lsa->lsa_stripe_off != LLAPI_LAYOUT_DEFAULT) {
                        fprintf(stderr, "Option 'stripe-offset' can't be "
                                "specified with Data-on-MDT component: %lld\n",
                                lsa->lsa_stripe_off);
                        return -EINVAL;
                }
                if (lsa->lsa_pool_name != 0) {
                        fprintf(stderr, "Option 'pool' can't be specified "
                                "with Data-on-MDT component: '%s'\n",
                                lsa->lsa_pool_name);
                        return -EINVAL;
                }

                rc = llapi_layout_pattern_set(layout, lsa->lsa_pattern);
                if (rc) {
                        fprintf(stderr, "Set stripe pattern %#llx failed. %s\n",
                                lsa->lsa_pattern, strerror(errno));
                        return rc;
                }
                /* Data-on-MDT component has always single stripe up to end */
                lsa->lsa_stripe_size = lsa->lsa_comp_end;
        }

        rc = llapi_layout_stripe_size_set(layout, lsa->lsa_stripe_size);
        if (rc) {
                fprintf(stderr, "Set stripe size %llu failed: %s\n",
                        lsa->lsa_stripe_size, strerror(errno));
                return rc;
        }

        rc = llapi_layout_stripe_count_set(layout, lsa->lsa_stripe_count);
        if (rc) {
                fprintf(stderr, "Set stripe count %lld failed: %s\n",
                        lsa->lsa_stripe_count, strerror(errno));
                return rc;
        }

        rc = llapi_layout_comp_flags_set(layout, lsa->lsa_comp_flags);
        if (rc) {
                fprintf(stderr, "Set flags 0x%x failed: %s\n",
                        lsa->lsa_comp_flags, strerror(errno));
                return rc;
        }

        if (lsa->lsa_pool_name != NULL) {
                rc = llapi_layout_pool_name_set(layout, lsa->lsa_pool_name);
                if (rc) {
                        fprintf(stderr, "Set pool name: %s failed. %s\n",
                                lsa->lsa_pool_name, strerror(errno));
                        return rc;
                }
        } else {
                rc = llapi_layout_pool_name_set(layout, "");
                if (rc) {
                        fprintf(stderr, "Clear pool name failed: %s\n",
                                strerror(errno));
                        return rc;
                }
        }

        if (lsa->lsa_nr_tgts > 0) {
                if (lsa->lsa_stripe_count > 0 &&
                    lsa->lsa_stripe_count != LLAPI_LAYOUT_DEFAULT &&
                    lsa->lsa_stripe_count != LLAPI_LAYOUT_WIDE &&
                    lsa->lsa_nr_tgts != lsa->lsa_stripe_count) {
                        fprintf(stderr, "stripe_count(%lld) != nr_tgts(%d)\n",
                                lsa->lsa_stripe_count, lsa->lsa_nr_tgts);
                        return -EINVAL;
                }
                for (i = 0; i < lsa->lsa_nr_tgts; i++) {
                        rc = llapi_layout_ost_index_set(layout, i,
                                                        lsa->lsa_tgts[i]);
                        if (rc)
                                break;
                }
        } else if (lsa->lsa_stripe_off != LLAPI_LAYOUT_DEFAULT &&
                   lsa->lsa_stripe_off != -1) {
                rc = llapi_layout_ost_index_set(layout, 0, lsa->lsa_stripe_off);
        }
        if (rc) {
                fprintf(stderr, "Set ost index %d failed. %s\n",
                        i, strerror(errno));
                return rc;
        }

        return 0;
}

static int build_component(struct llapi_layout **layout,
                           struct lfs_setstripe_args *lsa, bool set_extent)
{
        int rc;

        rc = comp_args_to_layout(layout, lsa, set_extent);
        if (rc)
                return rc;

        if (lsa->lsa_mirror_count > 0) {
                rc = llapi_layout_mirror_count_set(*layout,
                                                   lsa->lsa_mirror_count);
                if (rc)
                        return rc;

                rc = llapi_layout_flags_set(*layout, LCM_FL_RDONLY);
                if (rc)
                        return rc;
                lsa->lsa_mirror_count = 0;
        }

        return rc;
}

static int build_layout_from_yaml_node(struct cYAML *node,
                                       struct llapi_layout **layout,
                                       struct lfs_setstripe_args *lsa,
                                       __u32 *osts)
{
        char *string;
        int rc = 0;

        while (node) {
                if (node->cy_type == CYAML_TYPE_OBJECT) {
                        /* go deep to sub blocks */
                        rc = build_layout_from_yaml_node(node->cy_child, layout,
                                                         lsa, osts);
                        if (rc)
                                return rc;
                } else {
                        if (node->cy_string == NULL)
                                return -EINVAL;

                        string = node->cy_string;
                        /* skip leading lmm_ if present, to simplify parsing */
                        if (strncmp(string, "lmm_", 4) == 0)
                                string += 4;

                        if (node->cy_type == CYAML_TYPE_STRING) {
                                if (!strcmp(string, "lcme_extent.e_end")) {
                                        if (!strcmp(node->cy_valuestring, "EOF") ||
                                            !strcmp(node->cy_valuestring, "eof"))
                                                lsa->lsa_comp_end = LUSTRE_EOF;
                                } else if (!strcmp(string, "pool")) {
                                        lsa->lsa_pool_name = node->cy_valuestring;
                                } else if (!strcmp(string, "pattern")) {
                                        if (!strcmp(node->cy_valuestring, "mdt"))
                                                lsa->lsa_pattern = LLAPI_LAYOUT_MDT;
                                } else if (!strcmp(string, "lcme_flags")) {
                                        rc = comp_str2flags(node->cy_valuestring,
                                                            &lsa->lsa_comp_flags,
                                                            &lsa->lsa_comp_neg_flags);
                                        if (rc)
                                                return rc;
                                        /* Only template flags have meaning in
                                         * the layout for a new file
                                         */
                                        lsa->lsa_comp_flags &= LCME_TEMPLATE_FLAGS;
                                }
                        } else if (node->cy_type == CYAML_TYPE_NUMBER) {
                                if (!strcmp(string, "lcm_mirror_count")) {
                                        lsa->lsa_mirror_count = node->cy_valueint;
                                } else if (!strcmp(string, "lcme_extent.e_start")) {
                                        if (node->cy_valueint != 0 || *layout != NULL) {
                                                rc = build_component(layout, lsa, true);
                                                if (rc)
                                                        return rc;
                                        }

                                        if (node->cy_valueint == 0)
                                                lsa->lsa_first_comp = true;

                                        /* initialize lsa */
                                        setstripe_args_init(lsa);
                                        lsa->lsa_tgts = osts;
                                } else if (!strcmp(string, "lcme_extent.e_end")) {
                                        if (node->cy_valueint == -1)
                                                lsa->lsa_comp_end = LUSTRE_EOF;
                                        else
                                                lsa->lsa_comp_end = node->cy_valueint;
                                } else if (!strcmp(string, "stripe_count")) {
                                        lsa->lsa_stripe_count = node->cy_valueint;
                                } else if (!strcmp(string, "stripe_size")) {
                                        lsa->lsa_stripe_size = node->cy_valueint;
                                } else if (!strcmp(string, "stripe_offset")) {
                                        lsa->lsa_stripe_off = node->cy_valueint;
                                } else if (!strcmp(string, "l_ost_idx")) {
                                        osts[lsa->lsa_nr_tgts] = node->cy_valueint;
                                        lsa->lsa_nr_tgts++;
                                }
                        }
                }
                node = node->cy_next;
        }

        return rc;
}

static int lfs_comp_create_from_yaml(char *template,
                                     struct llapi_layout **layout,
                                     struct lfs_setstripe_args *lsa,
                                     __u32 *osts)
{
        struct cYAML *tree = NULL, *err_rc = NULL;
        int rc = 0;

        tree = cYAML_build_tree(template, NULL, 0, &err_rc, false);
        if (!tree) {
                fprintf(stderr, "%s: cannot parse YAML file %s\n",
                        progname, template);
                cYAML_build_error(-EINVAL, -1, "yaml", "from comp yaml",
                                  "can't parse", &err_rc);
                cYAML_print_tree2file(stderr, err_rc);
                cYAML_free_tree(err_rc);
                rc = -EINVAL;
                goto err;
        }

        /* initialize lsa for plain file */
        setstripe_args_init(lsa);
        lsa->lsa_tgts = osts;

        rc = build_layout_from_yaml_node(tree, layout, lsa, osts);
        if (rc) {
                fprintf(stderr, "%s: cannot build layout from YAML file %s.\n",
                        progname, template);
                goto err;
        } else {
                rc = build_component(layout, lsa, *layout != NULL);
        }
        /* clean clean lsa */
        setstripe_args_init(lsa);

err:
        if (tree)
                cYAML_free_tree(tree);
        return rc;
}

/* In 'lfs setstripe --component-add' mode, we need to fetch the extent
 * end of the last component in the existing file, and adjust the
 * first extent start of the components to be added accordingly. */
static int adjust_first_extent(char *fname, struct llapi_layout *layout)
{
        struct llapi_layout *head;
        uint64_t start, end, stripe_size, prev_end = 0;
        int rc;

        if (layout == NULL) {
                fprintf(stderr,
                        "%s setstripe: layout must be specified\n",
                        progname);
                return -EINVAL;
        }

        errno = 0;
        head = llapi_layout_get_by_path(fname, 0);
        if (head == NULL) {
                fprintf(stderr,
                        "%s setstripe: cannot read layout from '%s': %s\n",
                        progname, fname, strerror(errno));
                return -EINVAL;
        } else if (errno == ENODATA) {
                /* file without LOVEA, this component-add will be turned
                 * into a component-create. */
                llapi_layout_free(head);
                return -ENODATA;
        } else if (!llapi_layout_is_composite(head)) {
                fprintf(stderr, "%s setstripe: '%s' not a composite file\n",
                        progname, fname);
                llapi_layout_free(head);
                return -EINVAL;
        }

        rc = llapi_layout_comp_extent_get(head, &start, &prev_end);
        if (rc) {
                fprintf(stderr, "%s setstripe: cannot get prev extent: %s\n",
                        progname, strerror(errno));
                llapi_layout_free(head);
                return rc;
        }

        llapi_layout_free(head);

        /* Make sure we use the first component of the layout to be added. */
        rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
        if (rc < 0) {
                fprintf(stderr,
                        "%s setstripe: cannot move component cursor: %s\n",
                        progname, strerror(errno));
                return rc;
        }

        rc = llapi_layout_comp_extent_get(layout, &start, &end);
        if (rc) {
                fprintf(stderr, "%s setstripe: cannot get extent: %s\n",
                        progname, strerror(errno));
                return rc;
        }

        if (start > prev_end || end <= prev_end) {
                fprintf(stderr,
                        "%s setstripe: first extent [%lu, %lu) not adjacent with extent end %lu\n",
                        progname, start, end, prev_end);
                return -EINVAL;
        }

        rc = llapi_layout_stripe_size_get(layout, &stripe_size);
        if (rc) {
                fprintf(stderr, "%s setstripe: cannot get stripe size: %s\n",
                        progname, strerror(errno));
                return rc;
        }

        if (stripe_size != LLAPI_LAYOUT_DEFAULT &&
            (prev_end & (stripe_size - 1))) {
                fprintf(stderr,
                        "%s setstripe: stripe size %lu not aligned with %lu\n",
                        progname, stripe_size, prev_end);
                return -EINVAL;
        }

        rc = llapi_layout_comp_extent_set(layout, prev_end, end);
        if (rc) {
                fprintf(stderr,
                        "%s setstripe: cannot set component extent [%lu, %lu): %s\n",
                        progname, prev_end, end, strerror(errno));
                return rc;
        }

        return 0;
}

static inline bool arg_is_eof(char *arg)
{
        return !strncmp(arg, "-1", strlen("-1")) ||
               !strncmp(arg, "EOF", strlen("EOF")) ||
               !strncmp(arg, "eof", strlen("eof"));
}

/**
 * lfs_mirror_alloc() - Allocate a mirror argument structure.
 *
 * Return: Valid mirror_args pointer on success and
 *         NULL if memory allocation fails.
 */
static struct mirror_args *lfs_mirror_alloc(void)
{
        struct mirror_args *mirror = NULL;

        while (1) {
                mirror = calloc(1, sizeof(*mirror));
                if (mirror != NULL)
                        break;

                sleep(1);
        }

        return mirror;
}

/**
 * lfs_mirror_free() - Free memory allocated for a mirror argument
 *                     structure.
 * @mirror: Previously allocated mirror argument structure by
 *          lfs_mirror_alloc().
 *
 * Free memory allocated for @mirror.
 *
 * Return: void.
 */
static void lfs_mirror_free(struct mirror_args *mirror)
{
        if (mirror->m_layout != NULL)
                llapi_layout_free(mirror->m_layout);
        free(mirror);
}

/**
 * lfs_mirror_list_free() - Free memory allocated for a mirror list.
 * @mirror_list: Previously allocated mirror list.
 *
 * Free memory allocated for @mirror_list.
 *
 * Return: void.
 */
static void lfs_mirror_list_free(struct mirror_args *mirror_list)
{
        struct mirror_args *next_mirror = NULL;

        while (mirror_list != NULL) {
                next_mirror = mirror_list->m_next;
                lfs_mirror_free(mirror_list);
                mirror_list = next_mirror;
        }
}

enum {
        LFS_POOL_OPT = 3,
        LFS_COMP_COUNT_OPT,
        LFS_COMP_START_OPT,
        LFS_COMP_FLAGS_OPT,
        LFS_COMP_DEL_OPT,
        LFS_COMP_SET_OPT,
        LFS_COMP_ADD_OPT,
        LFS_COMP_NO_VERIFY_OPT,
        LFS_PROJID_OPT,
        LFS_MIRROR_FLAGS_OPT,
        LFS_MIRROR_ID_OPT,
        LFS_MIRROR_STATE_OPT,
        LFS_LAYOUT_COPY,
        LFS_MIRROR_INDEX_OPT,
};

/* functions */
static int lfs_setstripe_internal(int argc, char **argv,
                                  enum setstripe_origin opc)
{
        struct lfs_setstripe_args        lsa = { 0 };
        struct llapi_stripe_param       *param = NULL;
        struct find_param                migrate_mdt_param = {
                .fp_max_depth = -1,
                .fp_mdt_index = -1,
        };
        char                            *fname;
        int                              result = 0;
        int                              result2 = 0;
        char                            *end;
        int                              c;
        int                              delete = 0;
        unsigned long long               size_units = 1;
        bool                             migrate_mode = false;
        bool                             migrate_mdt_mode = false;
        bool                             migration_block = false;
        __u64                            migration_flags = 0;
        __u32                            tgts[LOV_MAX_STRIPE_COUNT] = { 0 };
        int                              comp_del = 0, comp_set = 0;
        int                              comp_add = 0;
        __u32                            comp_id = 0;
        struct llapi_layout             *layout = NULL;
        struct llapi_layout             **lpp = &layout;
        bool                             mirror_mode = false;
        bool                             has_m_file = false;
        __u32                            mirror_count = 0;
        enum mirror_flags                mirror_flags = 0;
        struct mirror_args              *mirror_list = NULL;
        struct mirror_args              *new_mirror = NULL;
        struct mirror_args              *last_mirror = NULL;
        __u16                            mirror_id = 0;
        char                             cmd[PATH_MAX];
        bool from_yaml = false;
        bool from_copy = false;
        char *template = NULL;

        struct option long_opts[] = {
/* find { .val = '0',   .name = "null",         .has_arg = no_argument }, */
/* find { .val = 'A',   .name = "atime",        .has_arg = required_argument }*/
        /* --block is only valid in migrate mode */
        { .val = 'b',   .name = "block",        .has_arg = no_argument },
        { .val = LFS_COMP_ADD_OPT,
                        .name = "comp-add",     .has_arg = no_argument },
        { .val = LFS_COMP_ADD_OPT,
                        .name = "component-add", .has_arg = no_argument },
        { .val = LFS_COMP_DEL_OPT,
                        .name = "comp-del",     .has_arg = no_argument },
        { .val = LFS_COMP_DEL_OPT,
                        .name = "component-del", .has_arg = no_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                        .name = "comp-flags",   .has_arg = required_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                        .name = "component-flags",
                                                .has_arg = required_argument },
        { .val = LFS_COMP_SET_OPT,
                        .name = "comp-set",     .has_arg = no_argument },
        { .val = LFS_COMP_SET_OPT,
                        .name = "component-set",
                                                .has_arg = no_argument},
        { .val = LFS_COMP_NO_VERIFY_OPT,
                        .name = "no-verify",    .has_arg = no_argument},
        { .val = LFS_MIRROR_FLAGS_OPT,
                        .name = "flags",        .has_arg = required_argument},
        { .val = LFS_MIRROR_ID_OPT,
                        .name = "mirror-id",    .has_arg = required_argument},
        { .val = LFS_LAYOUT_COPY,
                        .name = "copy",         .has_arg = required_argument},
        { .val = 'c',   .name = "stripe-count", .has_arg = required_argument},
        { .val = 'c',   .name = "stripe_count", .has_arg = required_argument},
        { .val = 'c',   .name = "mdt-count",    .has_arg = required_argument},
/* find { .val = 'C',   .name = "ctime",        .has_arg = required_argument }*/
        { .val = 'd',   .name = "delete",       .has_arg = no_argument},
        { .val = 'd',   .name = "destroy",      .has_arg = no_argument},
        /* --non-direct is only valid in migrate mode */
        { .val = 'D',   .name = "non-direct",   .has_arg = no_argument },
        { .val = 'E',   .name = "comp-end",     .has_arg = required_argument},
        { .val = 'E',   .name = "component-end",
                                                .has_arg = required_argument},
        { .val = 'f',   .name = "file",         .has_arg = required_argument },
/* find { .val = 'F',   .name = "fid",          .has_arg = no_argument }, */
/* find { .val = 'g',   .name = "gid",          .has_arg = no_argument }, */
/* find { .val = 'G',   .name = "group",        .has_arg = required_argument }*/
/* find { .val = 'h',   .name = "help",         .has_arg = no_argument }, */
        { .val = 'H',   .name = "mdt-hash",     .has_arg = required_argument},
        { .val = 'i',   .name = "stripe-index", .has_arg = required_argument},
        { .val = 'i',   .name = "stripe_index", .has_arg = required_argument},
        { .val = 'I',   .name = "comp-id",      .has_arg = required_argument},
        { .val = 'I',   .name = "component-id", .has_arg = required_argument},
        { .val = 'L',   .name = "layout",       .has_arg = required_argument },
        { .val = 'm',   .name = "mdt",          .has_arg = required_argument},
        { .val = 'm',   .name = "mdt-index",    .has_arg = required_argument},
        { .val = 'm',   .name = "mdt_index",    .has_arg = required_argument},
        /* --non-block is only valid in migrate mode */
        { .val = 'n',   .name = "non-block",    .has_arg = no_argument },
        { .val = 'N',   .name = "mirror-count", .has_arg = optional_argument},
        { .val = 'o',   .name = "ost",          .has_arg = required_argument },
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
        { .val = 'o',   .name = "ost-list",     .has_arg = required_argument },
        { .val = 'o',   .name = "ost_list",     .has_arg = required_argument },
#endif
        { .val = 'p',   .name = "pool",         .has_arg = required_argument },
/* find { .val = 'P',   .name = "print",        .has_arg = no_argument }, */
/* getstripe { .val = 'q', .name = "quiet",     .has_arg = no_argument }, */
/* getstripe { .val = 'r', .name = "recursive", .has_arg = no_argument }, */
/* getstripe { .val = 'R', .name = "raw",       .has_arg = no_argument }, */
        { .val = 'S',   .name = "stripe-size",  .has_arg = required_argument },
        { .val = 'S',   .name = "stripe_size",  .has_arg = required_argument },
/* find { .val = 't',   .name = "type",         .has_arg = required_argument }*/
/* dirstripe { .val = 'T', .name = "mdt-count", .has_arg = required_argument }*/
/* find { .val = 'u',   .name = "uid",          .has_arg = required_argument }*/
/* find { .val = 'U',   .name = "user",         .has_arg = required_argument }*/
        /* --verbose is only valid in migrate mode */
        { .val = 'v',   .name = "verbose",      .has_arg = no_argument},
        { .val = 'y',   .name = "yaml",         .has_arg = required_argument },
        { .name = NULL } };

        setstripe_args_init(&lsa);

        migrate_mode = (opc == SO_MIGRATE);
        mirror_mode = (opc == SO_MIRROR_CREATE || opc == SO_MIRROR_EXTEND);

        snprintf(cmd, sizeof(cmd), "%s %s", progname, argv[0]);
        progname = cmd;
        while ((c = getopt_long(argc, argv,
                                "bc:dDE:f:H:i:I:m:N::no:p:L:s:S:vy:", long_opts,
                                NULL)) >= 0) {
                switch (c) {
                case 0:
                        /* Long options. */
                        break;
                case LFS_COMP_ADD_OPT:
                        comp_add = 1;
                        break;
                case LFS_COMP_DEL_OPT:
                        comp_del = 1;
                        break;
                case LFS_COMP_FLAGS_OPT:
                        result = comp_str2flags(optarg, &lsa.lsa_comp_flags,
                                                &lsa.lsa_comp_neg_flags);
                        if (result != 0)
                                goto usage_error;
                        if (mirror_mode && lsa.lsa_comp_neg_flags) {
                                fprintf(stderr, "%s: inverted flags are not supported\n",
                                        progname);
                                goto usage_error;
                        }
                        if (lsa.lsa_comp_neg_flags & LCME_FL_STALE) {
                                fprintf(stderr,
                                        "%s: cannot clear 'stale' flags from component. Please use lfs-mirror-resync(1) instead\n",
                                        progname);
                                result = -EINVAL;
                                goto error;
                        }

                        break;
                case LFS_COMP_SET_OPT:
                        comp_set = 1;
                        break;
                case LFS_COMP_NO_VERIFY_OPT:
                        mirror_flags |= MF_NO_VERIFY;
                        break;
                case LFS_MIRROR_ID_OPT:
                        mirror_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || mirror_id == 0) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }
                        break;
                case LFS_MIRROR_FLAGS_OPT: {
                        __u32 flags;

                        if (!mirror_mode || !last_mirror) {
                                fprintf(stderr, "error: %s: --flags must be specified with --mirror-count|-N option\n",
                                        progname);
                                goto usage_error;
                        }

                        result = comp_str2flags(optarg, &last_mirror->m_flags,
                                                &flags);
                        if (result != 0)
                                goto usage_error;

                        if (flags) {
                                fprintf(stderr, "%s: inverted flags are not supported\n",
                                        progname);
                                result = -EINVAL;
                                goto usage_error;
                        }
                        if (last_mirror->m_flags & ~LCME_USER_FLAGS) {
                                fprintf(stderr,
                                        "%s: unsupported mirror flags: %s\n",
                                        progname, optarg);
                                result = -EINVAL;
                                goto error;
                        }
                        break;
                }
                case LFS_LAYOUT_COPY:
                        from_copy = true;
                        template = optarg;
                        break;
                case 'b':
                        if (!migrate_mode) {
                                fprintf(stderr,
                                        "%s %s: -b|--block valid only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        migration_block = true;
                        break;
                case 'c':
                        lsa.lsa_stripe_count = strtoul(optarg, &end, 0);
                        if (*end != '\0') {
                                fprintf(stderr,
                                        "%s %s: invalid stripe count '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }

                        if (lsa.lsa_stripe_count == -1)
                                lsa.lsa_stripe_count = LLAPI_LAYOUT_WIDE;
                        break;
                case 'd':
                        /* delete the default striping pattern */
                        delete = 1;
                        if (opc == SO_MIRROR_SPLIT) {
                                if (has_m_file) {
                                        fprintf(stderr,
                                              "%s %s: -d cannot used with -f\n",
                                                progname, argv[0]);
                                        goto usage_error;
                                }
                                mirror_flags |= MF_DESTROY;
                        }
                        break;
                case 'D':
                        if (!migrate_mode) {
                                fprintf(stderr,
                                        "%s %s: -D|--non-direct is valid "
                                        "only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        migration_flags |= MIGRATION_NONDIRECT;
                        break;
                case 'E':
                        if (lsa.lsa_comp_end != 0) {
                                result = comp_args_to_layout(lpp, &lsa, true);
                                if (result) {
                                        fprintf(stderr,
                                                "%s %s: invalid layout\n",
                                                progname, argv[0]);
                                        goto usage_error;
                                }

                                setstripe_args_init_inherit(&lsa);
                        }

                        if (arg_is_eof(optarg)) {
                                lsa.lsa_comp_end = LUSTRE_EOF;
                        } else {
                                result = llapi_parse_size(optarg,
                                                        &lsa.lsa_comp_end,
                                                        &size_units, 0);
                                if (result) {
                                        fprintf(stderr,
                                                "%s %s: invalid component end '%s'\n",
                                                progname, argv[0], optarg);
                                        goto usage_error;
                                }
                        }
                        break;
                case 'H':
                        if (!migrate_mode) {
                                fprintf(stderr, "--mdt-hash is valid only for migrate command\n");
                                return CMD_HELP;
                        }

                        lsa.lsa_pattern = check_hashtype(optarg);
                        if (lsa.lsa_pattern == 0) {
                                fprintf(stderr,
                                        "%s %s: bad stripe hash type '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'i':
                        lsa.lsa_stripe_off = strtol(optarg, &end, 0);
                        if (*end != '\0') {
                                fprintf(stderr,
                                        "%s %s: invalid stripe offset '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }
                        if (lsa.lsa_stripe_off == -1)
                                lsa.lsa_stripe_off = LLAPI_LAYOUT_DEFAULT;
                        break;
                case 'I':
                        comp_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || comp_id == 0 ||
                            comp_id > LCME_ID_MAX) {
                                fprintf(stderr,
                                        "%s %s: invalid component ID '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }
                        break;
                case 'f':
                        if (opc != SO_MIRROR_EXTEND && opc != SO_MIRROR_SPLIT) {
                                fprintf(stderr,
                                        "error: %s: invalid option: %s\n",
                                        progname, argv[optopt + 1]);
                                goto usage_error;
                        }
                        if (opc == SO_MIRROR_EXTEND) {
                                if (last_mirror == NULL) {
                                        fprintf(stderr,
                                "error: %s: '-N' must exist in front of '%s'\n",
                                                progname, argv[optopt + 1]);
                                        goto usage_error;
                                }
                                last_mirror->m_file = optarg;
                                last_mirror->m_count = 1;
                        } else {
                                /* mirror split */
                                if (mirror_list == NULL)
                                        mirror_list = lfs_mirror_alloc();
                                mirror_list->m_file = optarg;
                        }
                        has_m_file = true;
                        break;
                case 'L':
                        if (strcmp(argv[optind - 1], "mdt") == 0) {
                                /* Can be only the first component */
                                if (layout != NULL) {
                                        result = -EINVAL;
                                        fprintf(stderr, "error: 'mdt' layout "
                                                "can be only the first one\n");
                                        goto error;
                                }
                                if (lsa.lsa_comp_end > (1ULL << 30)) { /* 1Gb */
                                        result = -EFBIG;
                                        fprintf(stderr, "error: 'mdt' layout "
                                                "size is too big\n");
                                        goto error;
                                }
                                lsa.lsa_pattern = LLAPI_LAYOUT_MDT;
                        } else if (strcmp(argv[optind - 1], "raid0") != 0) {
                                result = -EINVAL;
                                fprintf(stderr, "error: layout '%s' is "
                                        "unknown, supported layouts are: "
                                        "'mdt', 'raid0'\n", argv[optind]);
                                goto error;
                        }
                        break;
                case 'm':
                        if (!migrate_mode) {
                                fprintf(stderr,
                                        "%s %s: -m|--mdt-index is valid only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        migrate_mdt_mode = true;
                        lsa.lsa_nr_tgts = parse_targets(tgts,
                                                sizeof(tgts) / sizeof(__u32),
                                                lsa.lsa_nr_tgts, optarg);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid MDT target(s) '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }

                        lsa.lsa_tgts = tgts;
                        if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
                                lsa.lsa_stripe_off = tgts[0];
                        break;
                case 'n':
                        if (!migrate_mode) {
                                fprintf(stderr,
                                        "%s %s: -n|--non-block valid only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        migration_flags |= MIGRATION_NONBLOCK;
                        break;
                case 'N':
                        if (opc == SO_SETSTRIPE) {
                                opc = SO_MIRROR_CREATE;
                                mirror_mode = true;
                        }
                        mirror_count = 1;
                        if (optarg != NULL) {
                                mirror_count = strtoul(optarg, &end, 0);
                                if (*end != '\0' || mirror_count == 0) {
                                        fprintf(stderr,
                                                "error: %s: bad mirror count: %s\n",
                                                progname, optarg);
                                        result = -EINVAL;
                                        goto error;
                                }
                        }

                        new_mirror = lfs_mirror_alloc();
                        new_mirror->m_count = mirror_count;

                        if (mirror_list == NULL)
                                mirror_list = new_mirror;

                        if (last_mirror != NULL) {
                                /* wrap up last mirror */
                                if (lsa.lsa_comp_end == 0)
                                        lsa.lsa_comp_end = LUSTRE_EOF;

                                result = comp_args_to_layout(lpp, &lsa, true);
                                if (result) {
                                        lfs_mirror_free(new_mirror);
                                        goto error;
                                }

                                setstripe_args_init_inherit(&lsa);

                                last_mirror->m_next = new_mirror;
                        }

                        last_mirror = new_mirror;
                        lpp = &last_mirror->m_layout;
                        break;
                case 'o':
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                        if (strcmp(argv[optind - 1], "--ost-list") == 0)
                                fprintf(stderr, "warning: '--ost-list' is "
                                        "deprecated, use '--ost' instead\n");
#endif
                        lsa.lsa_nr_tgts = parse_targets(tgts,
                                                sizeof(tgts) / sizeof(__u32),
                                                lsa.lsa_nr_tgts, optarg);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid OST target(s) '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }

                        lsa.lsa_tgts = tgts;
                        if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
                                lsa.lsa_stripe_off = tgts[0];
                        break;
                case 'p':
                        if (optarg == NULL)
                                goto usage_error;
                        lsa.lsa_pool_name = optarg;

                        if (strlen(lsa.lsa_pool_name) == 0 ||
                            strncmp(lsa.lsa_pool_name, "none",
                                    LOV_MAXPOOLNAME) == 0)
                                lsa.lsa_pool_name = NULL;
                        break;
                case 'S':
                        result = llapi_parse_size(optarg, &lsa.lsa_stripe_size,
                                                  &size_units, 0);
                        if (result) {
                                fprintf(stderr,
                                        "%s %s: invalid stripe size '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }
                        break;
                case 'v':
                        if (!migrate_mode) {
                                fprintf(stderr,
                                        "%s %s: -v|--verbose valid only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        migrate_mdt_param.fp_verbose = VERBOSE_DETAIL;
                        migration_flags = MIGRATION_VERBOSE;
                        break;
                case 'y':
                        from_yaml = true;
                        template = optarg;
                        break;
                default:
                        fprintf(stderr, "%s %s: unrecognized option '%s'\n",
                                progname, argv[0], argv[optind - 1]);
                        goto usage_error;
                }
        }

        fname = argv[optind];

        if (optind == argc) {
                fprintf(stderr, "%s %s: FILE must be specified\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (mirror_mode && mirror_count == 0) {
                fprintf(stderr,
                        "error: %s: --mirror-count|-N option is required\n",
                        progname);
                result = -EINVAL;
                goto error;
        }

        if (mirror_mode) {
                if (lsa.lsa_comp_end == 0)
                        lsa.lsa_comp_end = LUSTRE_EOF;
        }

        if (lsa.lsa_comp_end != 0) {
                result = comp_args_to_layout(lpp, &lsa, true);
                if (result)
                        goto error;
        }

        if (mirror_flags & MF_NO_VERIFY) {
                if (opc != SO_MIRROR_EXTEND) {
                        fprintf(stderr,
                                "error: %s: --no-verify is valid only for lfs mirror extend command\n",
                                progname);
                        result = -EINVAL;
                        goto error;
                } else if (!has_m_file) {
                        fprintf(stderr,
                                "error: %s: --no-verify must be specified with -f <victim_file> option\n",
                                progname);
                        result = -EINVAL;
                        goto error;
                }
        }

        /* Only LCME_FL_INIT flags is used in PFL, and it shouldn't be
         * altered by user space tool, so we don't need to support the
         * --component-set for this moment. */
        if (comp_set && !comp_id) {
                fprintf(stderr, "%s %s: --component-set doesn't have component-id set\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if ((delete + comp_set + comp_del + comp_add) > 1) {
                fprintf(stderr,
                        "%s %s: options --component-set, --component-del, --component-add and -d are mutually exclusive\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (delete && (setstripe_args_specified(&lsa) || comp_id != 0 ||
                       lsa.lsa_comp_flags != 0 || layout != NULL)) {
                fprintf(stderr,
                        "%s %s: option -d is mutually exclusive with -s, -c, -o, -p, -I, -F and -E options\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if ((comp_set || comp_del) &&
            (setstripe_args_specified(&lsa) || layout != NULL)) {
                fprintf(stderr,
                        "%s %s: options --component-del and --component-set are mutually exclusive when used with -c, -E, -o, -p, or -s\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (comp_del && comp_id != 0 && lsa.lsa_comp_flags != 0) {
                fprintf(stderr,
                        "%s %s: options -I and -F are mutually exclusive when used with --component-del\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (comp_add || comp_del) {
                struct stat st;

                result = lstat(fname, &st);
                if (result == 0 && S_ISDIR(st.st_mode)) {
                        fprintf(stderr,
                                "%s setstripe: cannot use --component-add or --component-del for directory\n",
                                progname);
                        goto usage_error;
                }

                if (mirror_mode) {
                        fprintf(stderr, "error: %s: can't use --component-add "
                                "or --component-del for mirror operation\n",
                                progname);
                        goto usage_error;
                }
        }

        if (comp_add) {
                if (layout == NULL) {
                        fprintf(stderr,
                                "%s %s: option -E must be specified with --component-add\n",
                                progname, argv[0]);
                        goto usage_error;
                }

                result = adjust_first_extent(fname, layout);
                if (result == -ENODATA)
                        comp_add = 0;
                else if (result != 0)
                        goto error;
        }

        if (from_yaml && from_copy) {
                fprintf(stderr,
                        "%s: can't specify --yaml and --copy together\n",
                        progname);
                goto error;
        }

        if ((from_yaml || from_copy) &&
            (setstripe_args_specified(&lsa) || layout != NULL)) {
                fprintf(stderr, "error: %s: can't specify --yaml with "
                        "-c, -S, -i, -o, -p or -E options.\n",
                        argv[0]);
                goto error;
        }

        if ((migration_flags & MIGRATION_NONBLOCK) && migration_block) {
                fprintf(stderr,
                        "%s %s: options --non-block and --block are mutually exclusive\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (!comp_del && !comp_set && (opc != SO_MIRROR_SPLIT) &&
            comp_id != 0) {
                fprintf(stderr,
                "%s %s: option -I can only be used with --component-del or --component-set or lfs mirror split\n",
                        progname, argv[0]);
                goto usage_error;
        }

        if (migrate_mdt_mode) {
                struct lmv_user_md *lmu;

                /* initialize migrate mdt parameters */
                lmu = calloc(1, lmv_user_md_size(lsa.lsa_nr_tgts,
                                                 LMV_USER_MAGIC_SPECIFIC));
                if (!lmu) {
                        fprintf(stderr,
                                "%s %s: cannot allocate memory for lmv_user_md: %s\n",
                                progname, argv[0], strerror(ENOMEM));
                        result = -ENOMEM;
                        goto error;
                }
                if (lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT)
                        lmu->lum_stripe_count = lsa.lsa_stripe_count;
                if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT) {
                        fprintf(stderr,
                                "%s %s: migrate should specify MDT index\n",
                                progname, argv[0]);
                        free(lmu);
                        goto usage_error;
                }
                lmu->lum_stripe_offset = lsa.lsa_stripe_off;
                if (lsa.lsa_pattern != LLAPI_LAYOUT_RAID0)
                        lmu->lum_hash_type = lsa.lsa_pattern;
                else
                        lmu->lum_hash_type = LMV_HASH_TYPE_FNV_1A_64;
                if (lsa.lsa_pool_name)
                        strncpy(lmu->lum_pool_name, lsa.lsa_pool_name,
                                sizeof(lmu->lum_pool_name));
                if (lsa.lsa_nr_tgts > 1) {
                        int i;

                        if (lsa.lsa_stripe_count > 0 &&
                            lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT &&
                            lsa.lsa_stripe_count != lsa.lsa_nr_tgts) {
                                fprintf(stderr,
                                        "error: %s: stripe count %lld doesn't match the number of MDTs: %d\n",
                                        progname, lsa.lsa_stripe_count,
                                                lsa.lsa_nr_tgts);
                                free(lmu);
                                goto usage_error;
                        }

                        lmu->lum_magic = LMV_USER_MAGIC_SPECIFIC;
                        lmu->lum_stripe_count = lsa.lsa_nr_tgts;
                        for (i = 0; i < lsa.lsa_nr_tgts; i++)
                                lmu->lum_objects[i].lum_mds = lsa.lsa_tgts[i];
                } else {
                        lmu->lum_magic = LMV_USER_MAGIC;
                }

                migrate_mdt_param.fp_lmv_md = lmu;
                migrate_mdt_param.fp_migrate = 1;
        } else if (layout == NULL) {
                /* initialize stripe parameters */
                param = calloc(1, offsetof(typeof(*param),
                               lsp_osts[lsa.lsa_nr_tgts]));
                if (param == NULL) {
                        fprintf(stderr,
                                "%s %s: cannot allocate memory for parameters: %s\n",
                                progname, argv[0], strerror(ENOMEM));
                        result = -ENOMEM;
                        goto error;
                }

                if (lsa.lsa_stripe_size != LLAPI_LAYOUT_DEFAULT)
                        param->lsp_stripe_size = lsa.lsa_stripe_size;
                if (lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT) {
                        if (lsa.lsa_stripe_count == LLAPI_LAYOUT_WIDE)
                                param->lsp_stripe_count = -1;
                        else
                                param->lsp_stripe_count = lsa.lsa_stripe_count;
                }
                if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
                        param->lsp_stripe_offset = -1;
                else
                        param->lsp_stripe_offset = lsa.lsa_stripe_off;
                param->lsp_pool = lsa.lsa_pool_name;
                param->lsp_is_specific = false;
                if (lsa.lsa_nr_tgts > 0) {
                        if (lsa.lsa_stripe_count > 0 &&
                            lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT &&
                            lsa.lsa_stripe_count != LLAPI_LAYOUT_WIDE &&
                            lsa.lsa_nr_tgts != lsa.lsa_stripe_count) {
                                fprintf(stderr, "error: %s: stripe count %lld "
                                        "doesn't match the number of OSTs: %d\n"
                                        , argv[0], lsa.lsa_stripe_count,
                                        lsa.lsa_nr_tgts);
                                free(param);
                                goto usage_error;
                        }

                        param->lsp_is_specific = true;
                        param->lsp_stripe_count = lsa.lsa_nr_tgts;
                        memcpy(param->lsp_osts, tgts,
                               sizeof(*tgts) * lsa.lsa_nr_tgts);
                }
        }

        if (from_yaml) {
                /* generate a layout from a YAML template */
                result = lfs_comp_create_from_yaml(template, &layout,
                                                   &lsa, tgts);
                if (result) {
                        fprintf(stderr, "error: %s: can't create composite "
                                "layout from template file %s\n",
                                argv[0], template);
                        goto error;
                }
        } else if (from_copy) {
                layout = llapi_layout_get_by_path(template, 0);
                if (layout == NULL) {
                        fprintf(stderr,
                            "%s: can't create composite layout from file %s.\n",
                                progname, template);
                        goto error;
                }
        }

        for (fname = argv[optind]; fname != NULL; fname = argv[++optind]) {
                if (migrate_mdt_mode) {
                        result = llapi_migrate_mdt(fname, &migrate_mdt_param);
                } else if (migrate_mode) {
                        result = lfs_migrate(fname, migration_flags, param,
                                             layout);
                } else if (comp_set != 0) {
                        result = lfs_component_set(fname, comp_id,
                                                   lsa.lsa_comp_flags,
                                                   lsa.lsa_comp_neg_flags);
                } else if (comp_del != 0) {
                        result = lfs_component_del(fname, comp_id,
                                                   lsa.lsa_comp_flags,
                                                   lsa.lsa_comp_neg_flags);
                } else if (comp_add != 0) {
                        result = lfs_component_add(fname, layout);
                } else if (opc == SO_MIRROR_CREATE) {
                        result = mirror_create(fname, mirror_list);
                } else if (opc == SO_MIRROR_EXTEND) {
                        result = mirror_extend(fname, mirror_list,
                                               mirror_flags);
                } else if (opc == SO_MIRROR_SPLIT) {
                        if (mirror_id == 0 && comp_id == 0) {
                                fprintf(stderr,
                        "%s %s: no mirror id or component id is specified\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
                        if (mirror_id != 0)
                                comp_id = mirror_id;
                        else
                                mirror_flags |= MF_COMP_ID;
                        result = mirror_split(fname, comp_id, mirror_flags,
                                              has_m_file ? mirror_list->m_file :
                                              NULL);
                } else if (layout != NULL) {
                        result = lfs_component_create(fname, O_CREAT | O_WRONLY,
                                                      0666, layout);
                        if (result >= 0) {
                                close(result);
                                result = 0;
                        }
                } else {
                        result = llapi_file_open_param(fname,
                                                       O_CREAT | O_WRONLY,
                                                       0666, param);
                        if (result >= 0) {
                                close(result);
                                result = 0;
                        }
                }
                if (result) {
                        /* Save the first error encountered. */
                        if (result2 == 0)
                                result2 = result;
                        continue;
                }
        }

        free(param);
        free(migrate_mdt_param.fp_lmv_md);
        llapi_layout_free(layout);
        lfs_mirror_list_free(mirror_list);
        return result2;
usage_error:
        result = CMD_HELP;
error:
        llapi_layout_free(layout);
        lfs_mirror_list_free(mirror_list);
        return result;
}

static int lfs_poollist(int argc, char **argv)
{
        if (argc != 2)
                return CMD_HELP;

        return llapi_poollist(argv[1]);
}

static int set_time(time_t *time, time_t *set, char *str)
{
        time_t t;
        int res = 0;
        char *endptr;

        if (str[0] == '+')
                res = 1;
        else if (str[0] == '-')
                res = -1;

        if (res)
                str++;

        t = strtol(str, &endptr, 0);
        if (*endptr != '\0') {
                fprintf(stderr,
                        "%s find: bad time '%s': %s\n",
                        progname, str, strerror(EINVAL));
                return INT_MAX;
        }
        if (*time < t * 24 * 60 * 60) {
                if (res != 0)
                        str--;
                fprintf(stderr,
                        "%s find: bad time '%s': too large\n",
                        progname, str);
                return INT_MAX;
        }

        *set = *time - t * 24 * 60 * 60;
        return res;
}

static int name2uid(unsigned int *id, const char *name)
{
        struct passwd *passwd;

        passwd = getpwnam(name);
        if (passwd == NULL)
                return -ENOENT;
        *id = passwd->pw_uid;

        return 0;
}

static int name2gid(unsigned int *id, const char *name)
{
        struct group *group;

        group = getgrnam(name);
        if (group == NULL)
                return -ENOENT;
        *id = group->gr_gid;

        return 0;
}

static inline int name2projid(unsigned int *id, const char *name)
{
        return -ENOTSUP;
}

static int uid2name(char **name, unsigned int id)
{
        struct passwd *passwd;

        passwd = getpwuid(id);
        if (passwd == NULL)
                return -ENOENT;
        *name = passwd->pw_name;

        return 0;
}

static inline int gid2name(char **name, unsigned int id)
{
        struct group *group;

        group = getgrgid(id);
        if (group == NULL)
                return -ENOENT;
        *name = group->gr_name;

        return 0;
}

static int name2layout(__u32 *layout, char *name)
{
        char *ptr, *layout_name;

        *layout = 0;
        for (ptr = name; ; ptr = NULL) {
                layout_name = strtok(ptr, ",");
                if (layout_name == NULL)
                        break;
                if (strcmp(layout_name, "released") == 0)
                        *layout |= LOV_PATTERN_F_RELEASED;
                else if (strcmp(layout_name, "raid0") == 0)
                        *layout |= LOV_PATTERN_RAID0;
                else if (strcmp(layout_name, "mdt") == 0)
                        *layout |= LOV_PATTERN_MDT;
                else
                        return -1;
        }
        return 0;
}

static int lfs_find(int argc, char **argv)
{
        int c, rc;
        int ret = 0;
        time_t t;
        struct find_param param = {
                .fp_max_depth = -1,
                .fp_quiet = 1,
        };
        struct option long_opts[] = {
        { .val = 'A',   .name = "atime",        .has_arg = required_argument },
        { .val = 'b',   .name = "blocks",       .has_arg = required_argument },
        { .val = LFS_COMP_COUNT_OPT,
                        .name = "comp-count",   .has_arg = required_argument },
        { .val = LFS_COMP_COUNT_OPT,
                        .name = "component-count",
                                                .has_arg = required_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                        .name = "comp-flags",   .has_arg = required_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                        .name = "component-flags",
                                                .has_arg = required_argument },
        { .val = LFS_COMP_START_OPT,
                        .name = "comp-start",   .has_arg = required_argument },
        { .val = LFS_COMP_START_OPT,
                        .name = "component-start",
                                                .has_arg = required_argument },
        { .val = LFS_MIRROR_STATE_OPT,
                        .name = "mirror-state", .has_arg = required_argument },
        { .val = 'c',   .name = "stripe-count", .has_arg = required_argument },
        { .val = 'c',   .name = "stripe_count", .has_arg = required_argument },
        { .val = 'C',   .name = "ctime",        .has_arg = required_argument },
/* getstripe { .val = 'd', .name = "directory", .has_arg = no_argument }, */
        { .val = 'D',   .name = "maxdepth",     .has_arg = required_argument },
        { .val = 'E',   .name = "comp-end",     .has_arg = required_argument },
        { .val = 'E',   .name = "component-end",
                                                .has_arg = required_argument },
/* find { .val = 'F',   .name = "fid",          .has_arg = no_argument }, */
        { .val = 'g',   .name = "gid",          .has_arg = required_argument },
        { .val = 'G',   .name = "group",        .has_arg = required_argument },
        { .val = 'H',   .name = "mdt-hash",     .has_arg = required_argument },
        { .val = 'i',   .name = "stripe-index", .has_arg = required_argument },
        { .val = 'i',   .name = "stripe_index", .has_arg = required_argument },
/* getstripe { .val = 'I', .name = "comp-id",   .has_arg = required_argument }*/
        { .val = 'L',   .name = "layout",       .has_arg = required_argument },
        { .val = 'm',   .name = "mdt",          .has_arg = required_argument },
        { .val = 'm',   .name = "mdt-index",    .has_arg = required_argument },
        { .val = 'm',   .name = "mdt_index",    .has_arg = required_argument },
        { .val = 'M',   .name = "mtime",        .has_arg = required_argument },
        { .val = 'n',   .name = "name",         .has_arg = required_argument },
        { .val = 'N',   .name = "mirror-count", .has_arg = required_argument },
/* find { .val = 'o'    .name = "or", .has_arg = no_argument }, like find(1) */
        { .val = 'O',   .name = "obd",          .has_arg = required_argument },
        { .val = 'O',   .name = "ost",          .has_arg = required_argument },
        /* no short option for pool yet, can be 'p' after 2.18 */
        { .val = LFS_POOL_OPT,
                        .name = "pool",         .has_arg = required_argument },
        { .val = '0',   .name = "print0",       .has_arg = no_argument },
        { .val = 'P',   .name = "print",        .has_arg = no_argument },
        { .val = LFS_PROJID_OPT,
                        .name = "projid",       .has_arg = required_argument },
/* getstripe { .val = 'q', .name = "quiet",     .has_arg = no_argument }, */
/* getstripe { .val = 'r', .name = "recursive", .has_arg = no_argument }, */
/* getstripe { .val = 'R', .name = "raw",       .has_arg = no_argument }, */
        { .val = 's',   .name = "size",         .has_arg = required_argument },
        { .val = 'S',   .name = "stripe-size",  .has_arg = required_argument },
        { .val = 'S',   .name = "stripe_size",  .has_arg = required_argument },
        { .val = 't',   .name = "type",         .has_arg = required_argument },
        { .val = 'T',   .name = "mdt-count",    .has_arg = required_argument },
        { .val = 'u',   .name = "uid",          .has_arg = required_argument },
        { .val = 'U',   .name = "user",         .has_arg = required_argument },
/* getstripe { .val = 'v', .name = "verbose",   .has_arg = no_argument }, */
/* getstripe { .val = 'y', .name = "yaml",      .has_arg = no_argument }, */
        { .name = NULL } };
        int pathstart = -1;
        int pathend = -1;
        int neg_opt = 0;
        time_t *xtime;
        int *xsign;
        int isoption;
        char *endptr;

        time(&t);

        /* when getopt_long_only() hits '!' it returns 1, puts "!" in optarg */
        while ((c = getopt_long_only(argc, argv,
                        "-0A:b:c:C:D:E:g:G:H:i:L:m:M:n:N:O:Ppqrs:S:t:T:u:U:v",
                        long_opts, NULL)) >= 0) {
                xtime = NULL;
                xsign = NULL;
                if (neg_opt)
                        --neg_opt;
                /* '!' is part of option */
                /* when getopt_long_only() finds a string which is not
                 * an option nor a known option argument it returns 1
                 * in that case if we already have found pathstart and pathend
                 * (i.e. we have the list of pathnames),
                 * the only supported value is "!"
                 */
                isoption = (c != 1) || (strcmp(optarg, "!") == 0);
                if (!isoption && pathend != -1) {
                        fprintf(stderr, "err: %s: filename|dirname must either "
                                        "precede options or follow options\n",
                                        argv[0]);
                        ret = CMD_HELP;
                        goto err;
                }
                if (!isoption && pathstart == -1)
                        pathstart = optind - 1;
                if (isoption && pathstart != -1 && pathend == -1)
                        pathend = optind - 2;
                switch (c) {
                case 0:
                        /* Long options. */
                        break;
                case 1:
                        /* unknown; opt is "!" or path component,
                         * checking done above.
                         */
                        if (strcmp(optarg, "!") == 0)
                                neg_opt = 2;
                        break;
                case 'A':
                        xtime = &param.fp_atime;
                        xsign = &param.fp_asign;
                        param.fp_exclude_atime = !!neg_opt;
                        /* no break, this falls through to 'C' for ctime */
                case 'C':
                        if (c == 'C') {
                                xtime = &param.fp_ctime;
                                xsign = &param.fp_csign;
                                param.fp_exclude_ctime = !!neg_opt;
                        }
                        /* no break, this falls through to 'M' for mtime */
                case 'M':
                        if (c == 'M') {
                                xtime = &param.fp_mtime;
                                xsign = &param.fp_msign;
                                param.fp_exclude_mtime = !!neg_opt;
                        }
                        rc = set_time(&t, xtime, optarg);
                        if (rc == INT_MAX) {
                                ret = -1;
                                goto err;
                        }
                        if (rc)
                                *xsign = rc;
                        break;
                case 'b':
                        if (optarg[0] == '+') {
                                param.fp_blocks_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_blocks_sign =  1;
                                optarg++;
                        }

                        param.fp_blocks_units = 1024;
                        ret = llapi_parse_size(optarg, &param.fp_blocks,
                                               &param.fp_blocks_units, 0);
                        if (ret) {
                                fprintf(stderr, "error: bad blocks '%s'\n",
                                        optarg);
                                goto err;
                        }
                        param.fp_check_blocks = 1;
                        param.fp_exclude_blocks = !!neg_opt;
                        break;
                case LFS_COMP_COUNT_OPT:
                        if (optarg[0] == '+') {
                                param.fp_comp_count_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_comp_count_sign =  1;
                                optarg++;
                        }

                        param.fp_comp_count = strtoul(optarg, &endptr, 0);
                        if (*endptr != '\0') {
                                fprintf(stderr, "error: bad component count "
                                        "'%s'\n", optarg);
                                goto err;
                        }
                        param.fp_check_comp_count = 1;
                        param.fp_exclude_comp_count = !!neg_opt;
                        break;
                case LFS_COMP_FLAGS_OPT:
                        rc = comp_str2flags(optarg, &param.fp_comp_flags,
                                            &param.fp_comp_neg_flags);
                        if (rc) {
                                fprintf(stderr, "error: bad component flags "
                                        "'%s'\n", optarg);
                                goto err;
                        }
                        param.fp_check_comp_flags = 1;
                        if (neg_opt) {
                                __u32 flags = param.fp_comp_neg_flags;
                                param.fp_comp_neg_flags = param.fp_comp_flags;
                                param.fp_comp_flags = flags;
                        }
                        break;
                case LFS_COMP_START_OPT:
                        if (optarg[0] == '+') {
                                param.fp_comp_start_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_comp_start_sign =  1;
                                optarg++;
                        }

                        rc = llapi_parse_size(optarg, &param.fp_comp_start,
                                              &param.fp_comp_start_units, 0);
                        if (rc) {
                                fprintf(stderr, "error: bad component start "
                                        "'%s'\n", optarg);
                                goto err;
                        }
                        param.fp_check_comp_start = 1;
                        param.fp_exclude_comp_start = !!neg_opt;
                        break;
                case LFS_MIRROR_STATE_OPT:
                        rc = mirror_str2state(optarg, &param.fp_mirror_state,
                                              &param.fp_mirror_neg_state);
                        if (rc) {
                                fprintf(stderr,
                                        "error: bad mirrored file state '%s'\n",
                                        optarg);
                                goto err;
                        }
                        param.fp_check_mirror_state = 1;
                        if (neg_opt) {
                                __u16 state = param.fp_mirror_neg_state;
                                param.fp_mirror_neg_state =
                                        param.fp_mirror_state;
                                param.fp_mirror_state = state;
                        }
                        break;
                case 'c':
                        if (optarg[0] == '+') {
                                param.fp_stripe_count_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_stripe_count_sign =  1;
                                optarg++;
                        }

                        param.fp_stripe_count = strtoul(optarg, &endptr, 0);
                        if (*endptr != '\0') {
                                fprintf(stderr,"error: bad stripe_count '%s'\n",
                                        optarg);
                                ret = -1;
                                goto err;
                        }
                        param.fp_check_stripe_count = 1;
                        param.fp_exclude_stripe_count = !!neg_opt;
                        break;
                case 'D':
                        param.fp_max_depth = strtol(optarg, 0, 0);
                        break;
                case 'E':
                        if (optarg[0] == '+') {
                                param.fp_comp_end_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_comp_end_sign =  1;
                                optarg++;
                        }

                        if (arg_is_eof(optarg)) {
                                param.fp_comp_end = LUSTRE_EOF;
                                param.fp_comp_end_units = 1;
                                rc = 0;
                        } else {
                                rc = llapi_parse_size(optarg,
                                                &param.fp_comp_end,
                                                &param.fp_comp_end_units, 0);
                        }
                        if (rc) {
                                fprintf(stderr, "error: bad component end "
                                        "'%s'\n", optarg);
                                goto err;
                        }
                        param.fp_check_comp_end = 1;
                        param.fp_exclude_comp_end = !!neg_opt;
                        break;
                case 'g':
                case 'G':
                        rc = name2gid(&param.fp_gid, optarg);
                        if (rc) {
                                param.fp_gid = strtoul(optarg, &endptr, 10);
                                if (*endptr != '\0') {
                                        fprintf(stderr, "Group/GID: %s cannot "
                                                "be found.\n", optarg);
                                        ret = -1;
                                        goto err;
                                }
                        }
                        param.fp_exclude_gid = !!neg_opt;
                        param.fp_check_gid = 1;
                        break;
                case 'H':
                        param.fp_hash_type = check_hashtype(optarg);
                        if (param.fp_hash_type == 0) {
                                fprintf(stderr, "error: bad hash_type '%s'\n",
                                        optarg);
                                ret = -1;
                                goto err;
                        }
                        param.fp_check_hash_type = 1;
                        param.fp_exclude_hash_type = !!neg_opt;
                        break;
                case 'L':
                        ret = name2layout(&param.fp_layout, optarg);
                        if (ret)
                                goto err;
                        param.fp_exclude_layout = !!neg_opt;
                        param.fp_check_layout = 1;
                        break;
                case 'u':
                case 'U':
                        rc = name2uid(&param.fp_uid, optarg);
                        if (rc) {
                                param.fp_uid = strtoul(optarg, &endptr, 10);
                                if (*endptr != '\0') {
                                        fprintf(stderr, "User/UID: %s cannot "
                                                "be found.\n", optarg);
                                        ret = -1;
                                        goto err;
                                }
                        }
                        param.fp_exclude_uid = !!neg_opt;
                        param.fp_check_uid = 1;
                        break;
                case 'n':
                        param.fp_pattern = (char *)optarg;
                        param.fp_exclude_pattern = !!neg_opt;
                        break;
                case 'N':
                        if (optarg[0] == '+') {
                                param.fp_mirror_count_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_mirror_count_sign =  1;
                                optarg++;
                        }

                        param.fp_mirror_count = strtoul(optarg, &endptr, 0);
                        if (*endptr != '\0') {
                                fprintf(stderr,
                                        "error: bad mirror count '%s'\n",
                                        optarg);
                                goto err;
                        }
                        param.fp_check_mirror_count = 1;
                        param.fp_exclude_mirror_count = !!neg_opt;
                        break;
                case 'm':
                case 'i':
                case 'O': {
                        char *buf, *token, *next, *p;
                        int len = 1;
                        void *tmp;

                        buf = strdup(optarg);
                        if (buf == NULL) {
                                ret = -ENOMEM;
                                goto err;
                        }

                        param.fp_exclude_obd = !!neg_opt;

                        token = buf;
                        while (token && *token) {
                                token = strchr(token, ',');
                                if (token) {
                                        len++;
                                        token++;
                                }
                        }
                        if (c == 'm') {
                                param.fp_exclude_mdt = !!neg_opt;
                                param.fp_num_alloc_mdts += len;
                                tmp = realloc(param.fp_mdt_uuid,
                                              param.fp_num_alloc_mdts *
                                              sizeof(*param.fp_mdt_uuid));
                                if (tmp == NULL) {
                                        ret = -ENOMEM;
                                        goto err_free;
                                }

                                param.fp_mdt_uuid = tmp;
                        } else {
                                param.fp_exclude_obd = !!neg_opt;
                                param.fp_num_alloc_obds += len;
                                tmp = realloc(param.fp_obd_uuid,
                                              param.fp_num_alloc_obds *
                                              sizeof(*param.fp_obd_uuid));
                                if (tmp == NULL) {
                                        ret = -ENOMEM;
                                        goto err_free;
                                }

                                param.fp_obd_uuid = tmp;
                        }
                        for (token = buf; token && *token; token = next) {
                                struct obd_uuid *puuid;
                                if (c == 'm') {
                                        puuid =
                                        &param.fp_mdt_uuid[param.fp_num_mdts++];
                                } else {
                                        puuid =
                                        &param.fp_obd_uuid[param.fp_num_obds++];
                                }
                                p = strchr(token, ',');
                                next = 0;
                                if (p) {
                                        *p = 0;
                                        next = p+1;
                                }

                                if (strlen(token) > sizeof(puuid->uuid) - 1) {
                                        ret = -E2BIG;
                                        goto err_free;
                                }

                                strncpy(puuid->uuid, token,
                                        sizeof(puuid->uuid));
                        }
err_free:
                        if (buf)
                                free(buf);
                        break;
                }
#if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 18, 53, 0)
                case 'p':
#endif
                case LFS_POOL_OPT:
                        if (strlen(optarg) > LOV_MAXPOOLNAME) {
                                fprintf(stderr,
                                        "Pool name %s is too long (max %d)\n",
                                        optarg, LOV_MAXPOOLNAME);
                                ret = -1;
                                goto err;
                        }
                        /*
                         * We do check for empty pool because empty pool
                         * is used to find V1 LOV attributes
                         */
                        strncpy(param.fp_poolname, optarg, LOV_MAXPOOLNAME);
                        param.fp_poolname[LOV_MAXPOOLNAME] = '\0';
                        param.fp_exclude_pool = !!neg_opt;
                        param.fp_check_pool = 1;
                        break;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 14, 53, 0)
                case 'p': /* want this for --pool, to match getstripe/find */
                        fprintf(stderr,
                                "warning: -p deprecated, use --print0 or -0\n");
#endif
                case '0':
                        param.fp_zero_end = 1;
                        break;
                case 'P': /* we always print, this option is a no-op */
                        break;
                case LFS_PROJID_OPT:
                        rc = name2projid(&param.fp_projid, optarg);
                        if (rc) {
                                param.fp_projid = strtoul(optarg, &endptr, 10);
                                if (*endptr != '\0') {
                                        fprintf(stderr,
                                                "Invalid project ID: %s",
                                                optarg);
                                        ret = -1;
                                        goto err;
                                }
                        }
                        param.fp_exclude_projid = !!neg_opt;
                        param.fp_check_projid = 1;
                        break;
                case 's':
                        if (optarg[0] == '+') {
                                param.fp_size_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_size_sign =  1;
                                optarg++;
                        }

                        ret = llapi_parse_size(optarg, &param.fp_size,
                                               &param.fp_size_units, 0);
                        if (ret) {
                                fprintf(stderr, "error: bad file size '%s'\n",
                                        optarg);
                                goto err;
                        }
                        param.fp_check_size = 1;
                        param.fp_exclude_size = !!neg_opt;
                        break;
                case 'S':
                        if (optarg[0] == '+') {
                                param.fp_stripe_size_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_stripe_size_sign =  1;
                                optarg++;
                        }

                        ret = llapi_parse_size(optarg, &param.fp_stripe_size,
                                               &param.fp_stripe_size_units, 0);
                        if (ret) {
                                fprintf(stderr, "error: bad stripe_size '%s'\n",
                                        optarg);
                                goto err;
                        }
                        param.fp_check_stripe_size = 1;
                        param.fp_exclude_stripe_size = !!neg_opt;
                        break;
                case 't':
                        param.fp_exclude_type = !!neg_opt;
                        switch (optarg[0]) {
                        case 'b':
                                param.fp_type = S_IFBLK;
                                break;
                        case 'c':
                                param.fp_type = S_IFCHR;
                                break;
                        case 'd':
                                param.fp_type = S_IFDIR;
                                break;
                        case 'f':
                                param.fp_type = S_IFREG;
                                break;
                        case 'l':
                                param.fp_type = S_IFLNK;
                                break;
                        case 'p':
                                param.fp_type = S_IFIFO;
                                break;
                        case 's':
                                param.fp_type = S_IFSOCK;
                                break;
                        default:
                                fprintf(stderr, "error: %s: bad type '%s'\n",
                                        argv[0], optarg);
                                ret = CMD_HELP;
                                goto err;
                        };
                        break;
                case 'T':
                        if (optarg[0] == '+') {
                                param.fp_mdt_count_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param.fp_mdt_count_sign =  1;
                                optarg++;
                        }

                        param.fp_mdt_count = strtoul(optarg, &endptr, 0);
                        if (*endptr != '\0') {
                                fprintf(stderr, "error: bad mdt_count '%s'\n",
                                        optarg);
                                ret = -1;
                                goto err;
                        }
                        param.fp_check_mdt_count = 1;
                        param.fp_exclude_mdt_count = !!neg_opt;
                        break;
                default:
                        ret = CMD_HELP;
                        goto err;
                };
        }

        if (pathstart == -1) {
                fprintf(stderr, "error: %s: no filename|pathname\n",
                        argv[0]);
                ret = CMD_HELP;
                goto err;
        } else if (pathend == -1) {
                /* no options */
                pathend = argc;
        }

        do {
                rc = llapi_find(argv[pathstart], &param);
                if (rc != 0 && ret == 0)
                        ret = rc;
        } while (++pathstart < pathend);

        if (ret)
                fprintf(stderr, "error: %s failed for %s.\n",
                        argv[0], argv[optind - 1]);
err:
        if (param.fp_obd_uuid && param.fp_num_alloc_obds)
                free(param.fp_obd_uuid);

        if (param.fp_mdt_uuid && param.fp_num_alloc_mdts)
                free(param.fp_mdt_uuid);

        return ret;
}

static int lfs_getstripe_internal(int argc, char **argv,
                                  struct find_param *param)
{
        struct option long_opts[] = {
/* find { .val = 'A',   .name = "atime",        .has_arg = required_argument }*/
/* find { .val = 'b',   .name = "blocks",       .has_arg = required_argument }*/
        { .val = LFS_COMP_COUNT_OPT,
                        .name = "comp-count",   .has_arg = no_argument },
        { .val = LFS_COMP_COUNT_OPT,
                .name = "component-count",      .has_arg = no_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                        .name = "comp-flags",   .has_arg = optional_argument },
        { .val = LFS_COMP_FLAGS_OPT,
                .name = "component-flags",      .has_arg = optional_argument },
        { .val = LFS_COMP_START_OPT,
                        .name = "comp-start",   .has_arg = optional_argument },
        { .val = LFS_COMP_START_OPT,
                .name = "component-start",      .has_arg = optional_argument },
        { .val = LFS_MIRROR_INDEX_OPT,
                .name = "mirror-index",         .has_arg = required_argument },
        { .val = LFS_MIRROR_ID_OPT,
                .name = "mirror-id",            .has_arg = required_argument },
        { .val = 'c',   .name = "stripe-count", .has_arg = no_argument },
        { .val = 'c',   .name = "stripe_count", .has_arg = no_argument },
/* find { .val = 'C',   .name = "ctime",        .has_arg = required_argument }*/
        { .val = 'd',   .name = "directory",    .has_arg = no_argument },
        { .val = 'D',   .name = "default",      .has_arg = no_argument },
        { .val = 'E',   .name = "comp-end",     .has_arg = optional_argument },
        { .val = 'E',   .name = "component-end", .has_arg = optional_argument },
        { .val = 'F',   .name = "fid",          .has_arg = no_argument },
        { .val = 'g',   .name = "generation",   .has_arg = no_argument },
/* find { .val = 'G',   .name = "group",        .has_arg = required_argument }*/
/* dirstripe { .val = 'H', .name = "mdt-hash",  .has_arg = required_argument }*/
        { .val = 'i',   .name = "stripe-index", .has_arg = no_argument },
        { .val = 'i',   .name = "stripe_index", .has_arg = no_argument },
        { .val = 'I',   .name = "comp-id",      .has_arg = optional_argument },
        { .val = 'I',   .name = "component-id", .has_arg = optional_argument },
        { .val = 'L',   .name = "layout",       .has_arg = no_argument },
        { .val = 'm',   .name = "mdt",          .has_arg = no_argument },
        { .val = 'm',   .name = "mdt-index",    .has_arg = no_argument },
        { .val = 'm',   .name = "mdt_index",    .has_arg = no_argument },
/* find { .val = 'M',   .name = "mtime",        .has_arg = required_argument }*/
/* find { .val = 'n',   .name = "name",         .has_arg = required_argument }*/
        { .val = 'N',   .name = "mirror-count", .has_arg = no_argument },
        { .val = 'O',   .name = "obd",          .has_arg = required_argument },
        { .val = 'O',   .name = "ost",          .has_arg = required_argument },
        { .val = 'p',   .name = "pool",         .has_arg = no_argument },
/* find { .val = 'P',   .name = "print",        .has_arg = no_argument }, */
        { .val = 'q',   .name = "quiet",        .has_arg = no_argument },
        { .val = 'r',   .name = "recursive",    .has_arg = no_argument },
        { .val = 'R',   .name = "raw",          .has_arg = no_argument },
        { .val = 'S',   .name = "stripe-size",  .has_arg = no_argument },
        { .val = 'S',   .name = "stripe_size",  .has_arg = no_argument },
/* find { .val = 't',   .name = "type",         .has_arg = required_argument }*/
/* dirstripe { .val = 'T', .name = "mdt-count", .has_arg = required_argument }*/
/* find { .val = 'u',   .name = "uid",          .has_arg = required_argument }*/
/* find { .val = 'U',   .name = "user",         .has_arg = required_argument }*/
        { .val = 'v',   .name = "verbose",      .has_arg = no_argument },
        { .val = 'y',   .name = "yaml",         .has_arg = no_argument },
        { .name = NULL } };
        int c, rc;
        int neg_opt = 0;
        int pathstart = -1, pathend = -1;
        int isoption;
        char *end, *tmp;

        while ((c = getopt_long(argc, argv,
                        "-cdDE::FghiI::LmMNoO:pqrRsSvy",
                        long_opts, NULL)) != -1) {
                if (neg_opt)
                        --neg_opt;

                /* '!' is part of option */
                isoption = (c != 1) || (strcmp(optarg, "!") == 0);
                if (!isoption && pathend != -1) {
                        fprintf(stderr,
                                "error: %s: filename|dirname must either precede options or follow options\n",
                                argv[0]);
                        return CMD_HELP;
                }
                if (!isoption && pathstart == -1)
                        pathstart = optind - 1;
                if (isoption && pathstart != -1 && pathend == -1)
                        pathend = optind - 2;

                switch (c) {
                case 1:
                        /* unknown: opt is "!" */
                        if (strcmp(optarg, "!") == 0)
                                neg_opt = 2;
                        break;
                case 'c':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_COUNT;
                                param->fp_max_depth = 0;
                        }
                        break;
                case LFS_COMP_COUNT_OPT:
                        param->fp_verbose |= VERBOSE_COMP_COUNT;
                        param->fp_max_depth = 0;
                        break;
                case LFS_COMP_FLAGS_OPT:
                        if (optarg != NULL) {
                                rc = comp_str2flags(optarg,
                                                    &param->fp_comp_flags,
                                                    &param->fp_comp_neg_flags);
                                if (rc != 0) {
                                        fprintf(stderr, "error: %s bad "
                                                "component flags '%s'.\n",
                                                argv[0], optarg);
                                        return CMD_HELP;
                                }
                                param->fp_check_comp_flags = 1;
                        } else {
                                param->fp_verbose |= VERBOSE_COMP_FLAGS;
                                param->fp_max_depth = 0;
                        }
                        break;
                case LFS_COMP_START_OPT:
                        if (optarg != NULL) {
                                tmp = optarg;
                                if (tmp[0] == '+') {
                                        param->fp_comp_start_sign = -1;
                                        tmp++;
                                } else if (tmp[0] == '-') {
                                        param->fp_comp_start_sign = 1;
                                        tmp++;
                                }
                                rc = llapi_parse_size(tmp,
                                                &param->fp_comp_start,
                                                &param->fp_comp_start_units, 0);
                                if (rc != 0) {
                                        fprintf(stderr, "error: %s bad "
                                                "component start '%s'.\n",
                                                argv[0], tmp);
                                        return CMD_HELP;
                                } else {
                                        param->fp_check_comp_start = 1;
                                }
                        } else {
                                param->fp_verbose |= VERBOSE_COMP_START;
                                param->fp_max_depth = 0;
                        }
                        break;
                case LFS_MIRROR_INDEX_OPT:
                        if (optarg[0] == '+') {
                                param->fp_mirror_index_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param->fp_mirror_index_sign = 1;
                                optarg++;
                        }

                        param->fp_mirror_index = strtoul(optarg, &end, 0);
                        if (*end != '\0' || (param->fp_mirror_index == 0 &&
                            param->fp_mirror_index_sign == 0 && neg_opt == 0)) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror index '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }
                        if (param->fp_mirror_id != 0) {
                                fprintf(stderr,
                                        "%s %s: can't specify both mirror index and mirror ID\n",
                                        progname, argv[0]);
                                return CMD_HELP;
                        }
                        param->fp_check_mirror_index = 1;
                        param->fp_exclude_mirror_index = !!neg_opt;
                        break;
                case LFS_MIRROR_ID_OPT:
                        if (optarg[0] == '+') {
                                param->fp_mirror_id_sign = -1;
                                optarg++;
                        } else if (optarg[0] == '-') {
                                param->fp_mirror_id_sign = 1;
                                optarg++;
                        }

                        param->fp_mirror_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || (param->fp_mirror_id == 0 &&
                            param->fp_mirror_id_sign == 0 && neg_opt == 0)) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }
                        if (param->fp_mirror_index != 0) {
                                fprintf(stderr,
                                        "%s %s: can't specify both mirror index and mirror ID\n",
                                        progname, argv[0]);
                                return CMD_HELP;
                        }
                        param->fp_check_mirror_id = 1;
                        param->fp_exclude_mirror_id = !!neg_opt;
                        break;
                case 'd':
                        param->fp_max_depth = 0;
                        break;
                case 'D':
                        param->fp_get_default_lmv = 1;
                        break;
                case 'E':
                        if (optarg != NULL) {
                                tmp = optarg;
                                if (tmp[0] == '+') {
                                        param->fp_comp_end_sign = -1;
                                        tmp++;
                                } else if (tmp[0] == '-') {
                                        param->fp_comp_end_sign = 1;
                                        tmp++;
                                }

                                if (arg_is_eof(tmp)) {
                                        param->fp_comp_end = LUSTRE_EOF;
                                        param->fp_comp_end_units = 1;
                                        rc = 0;
                                } else {
                                        rc = llapi_parse_size(tmp,
                                                &param->fp_comp_end,
                                                &param->fp_comp_end_units, 0);
                                }
                                if (rc != 0) {
                                        fprintf(stderr, "error: %s bad "
                                                "component end '%s'.\n",
                                                argv[0], tmp);
                                        return CMD_HELP;
                                }
                                param->fp_check_comp_end = 1;
                        } else {
                                param->fp_verbose |= VERBOSE_COMP_END;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'F':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_DFID;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'g':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_GENERATION;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'i':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_STRIPE_OFFSET;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'I':
                        if (optarg != NULL) {
                                param->fp_comp_id = strtoul(optarg, &end, 0);
                                if (*end != '\0' || param->fp_comp_id == 0 ||
                                    param->fp_comp_id > LCME_ID_MAX) {
                                        fprintf(stderr, "error: %s bad "
                                                "component id '%s'\n",
                                                argv[0], optarg);
                                        return CMD_HELP;
                                } else {
                                        param->fp_check_comp_id = 1;
                                }
                        } else {
                                param->fp_max_depth = 0;
                                param->fp_verbose |= VERBOSE_COMP_ID;
                        }
                        break;
                case 'L':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_PATTERN;
                                param->fp_max_depth = 0;
                        }
                        break;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                case 'M':
                        fprintf(stderr, "warning: '-M' deprecated"
                                ", use '--mdt-index' or '-m' instead\n");
#endif
                case 'm':
                        if (!(param->fp_verbose & VERBOSE_DETAIL))
                                param->fp_max_depth = 0;
                        param->fp_verbose |= VERBOSE_MDTINDEX;
                        break;
                case 'N':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_MIRROR_COUNT;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'O':
                        if (param->fp_obd_uuid) {
                                fprintf(stderr,
                                        "error: %s: only one obduuid allowed",
                                        argv[0]);
                                return CMD_HELP;
                        }
                        param->fp_obd_uuid = (struct obd_uuid *)optarg;
                        break;
                case 'p':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_POOL;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'q':
                        param->fp_quiet++;
                        break;
                case 'r':
                        param->fp_recursive = 1;
                        break;
                case 'R':
                        param->fp_raw = 1;
                        break;
                case 'S':
                        if (!(param->fp_verbose & VERBOSE_DETAIL)) {
                                param->fp_verbose |= VERBOSE_STRIPE_SIZE;
                                param->fp_max_depth = 0;
                        }
                        break;
                case 'v':
                        param->fp_verbose = VERBOSE_DEFAULT | VERBOSE_DETAIL;
                        break;
                case 'y':
                        param->fp_yaml = 1;
                        break;
                default:
                        return CMD_HELP;
                }
        }

        if (pathstart == -1) {
                fprintf(stderr, "error: %s: no filename|pathname\n",
                                argv[0]);
                return CMD_HELP;
        } else if (pathend == -1) {
                /* no options */
                pathend = argc;
        }

        if (pathend > argc)
                return CMD_HELP;

        if (param->fp_recursive)
                param->fp_max_depth = -1;
        else if (param->fp_verbose & VERBOSE_DETAIL)
                param->fp_max_depth = 1;

        if (!param->fp_verbose)
                param->fp_verbose = VERBOSE_DEFAULT;
        if (param->fp_quiet)
                param->fp_verbose = VERBOSE_OBJID;

        do {
                rc = llapi_getstripe(argv[pathstart], param);
        } while (++pathstart < pathend && !rc);

        if (rc)
                fprintf(stderr, "error: %s failed for %s.\n",
                        argv[0], argv[optind - 1]);
        return rc;
}

static int lfs_tgts(int argc, char **argv)
{
        char mntdir[PATH_MAX] = {'\0'}, path[PATH_MAX] = {'\0'};
        struct find_param param;
        int index = 0, rc=0;

        if (argc > 2)
                return CMD_HELP;

        if (argc == 2 && !realpath(argv[1], path)) {
                rc = -errno;
                fprintf(stderr, "error: invalid path '%s': %s\n",
                        argv[1], strerror(-rc));
                return rc;
        }

        while (!llapi_search_mounts(path, index++, mntdir, NULL)) {
                /* Check if we have a mount point */
                if (mntdir[0] == '\0')
                        continue;

                memset(&param, 0, sizeof(param));
                if (!strcmp(argv[0], "mdts"))
                        param.fp_get_lmv = 1;

                rc = llapi_ostlist(mntdir, &param);
                if (rc) {
                        fprintf(stderr, "error: %s: failed on %s\n",
                                argv[0], mntdir);
                }
                if (path[0] != '\0')
                        break;
                memset(mntdir, 0, PATH_MAX);
        }

        return rc;
}

static int lfs_getstripe(int argc, char **argv)
{
        struct find_param param = { 0 };

        param.fp_max_depth = 1;
        return lfs_getstripe_internal(argc, argv, &param);
}

/* functions */
static int lfs_getdirstripe(int argc, char **argv)
{
        struct find_param param = { 0 };
        struct option long_opts[] = {
        { .val = 'c',   .name = "mdt-count",    .has_arg = no_argument },
        { .val = 'D',   .name = "default",      .has_arg = no_argument },
        { .val = 'H',   .name = "mdt-hash",     .has_arg = no_argument },
        { .val = 'i',   .name = "mdt-index",    .has_arg = no_argument },
        { .val = 'm',   .name = "mdt-index",    .has_arg = no_argument },
        { .val = 'O',   .name = "obd",          .has_arg = required_argument },
        { .val = 'r',   .name = "recursive",    .has_arg = no_argument },
        { .val = 'T',   .name = "mdt-count",    .has_arg = no_argument },
        { .val = 'y',   .name = "yaml",         .has_arg = no_argument },
        { .name = NULL } };
        int c, rc;

        param.fp_get_lmv = 1;

        while ((c = getopt_long(argc, argv,
                                "cDHimO:rtTy", long_opts, NULL)) != -1)
        {
                switch (c) {
                case 'c':
                case 'T':
                        param.fp_verbose |= VERBOSE_COUNT;
                        break;
                case 'D':
                        param.fp_get_default_lmv = 1;
                        break;
                case 'i':
                case 'm':
                        param.fp_verbose |= VERBOSE_STRIPE_OFFSET;
                        break;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                case 't':
                        fprintf(stderr, "warning: '-t' deprecated, "
                                "use '--mdt-hash' or '-H' instead\n");
#endif
                case 'H':
                        param.fp_verbose |= VERBOSE_HASH_TYPE;
                        break;
                case 'O':
                        if (param.fp_obd_uuid) {
                                fprintf(stderr,
                                        "error: %s: only one obduuid allowed",
                                        argv[0]);
                                return CMD_HELP;
                        }
                        param.fp_obd_uuid = (struct obd_uuid *)optarg;
                        break;
                case 'r':
                        param.fp_recursive = 1;
                        break;
                case 'y':
                        param.fp_yaml = 1;
                        break;
                default:
                        return CMD_HELP;
                }
        }

        if (optind >= argc)
                return CMD_HELP;

        if (param.fp_recursive)
                param.fp_max_depth = -1;

        if (!param.fp_verbose)
                param.fp_verbose = VERBOSE_DEFAULT;

        do {
                rc = llapi_getstripe(argv[optind], &param);
        } while (++optind < argc && !rc);

        if (rc)
                fprintf(stderr, "error: %s failed for %s.\n",
                        argv[0], argv[optind - 1]);
        return rc;
}

enum mntdf_flags {
        MNTDF_INODES    = 0x0001,
        MNTDF_COOKED    = 0x0002,
        MNTDF_LAZY      = 0x0004,
        MNTDF_VERBOSE   = 0x0008,
        MNTDF_SHOW      = 0x0010,
};

#define COOK(value)                                             \
({                                                              \
        int radix = 0;                                          \
        while (value > 1024) {                                  \
                value /= 1024;                                  \
                radix++;                                        \
        }                                                       \
        radix;                                                  \
})
#define UUF     "%-20s"
#define CSF     "%11s"
#define CDF     "%11llu"
#define HDF     "%8.1f%c"
#define RSF     "%4s"
#define RDF     "%3d%%"

static inline int obd_statfs_ratio(const struct obd_statfs *st, bool inodes)
{
        double avail, used, ratio = 0;

        if (inodes) {
                avail = st->os_ffree;
                used = st->os_files - st->os_ffree;
        } else {
                avail = st->os_bavail;
                used = st->os_blocks - st->os_bfree;
        }
        if (avail + used > 0)
                ratio = used / (used + avail) * 100;

        /* Round up to match df(1) usage percentage */
        return (ratio - (int)ratio) > 0 ? (int)(ratio + 1) : (int)ratio;
}

static int showdf(char *mntdir, struct obd_statfs *stat,
                  char *uuid, enum mntdf_flags flags,
                  char *type, int index, int rc)
{
        long long avail, used, total;
        int ratio = 0;
        char *suffix = "KMGTPEZY";
        /* Note if we have >2^64 bytes/fs these buffers will need to be grown */
        char tbuf[3 * sizeof(__u64)];
        char ubuf[3 * sizeof(__u64)];
        char abuf[3 * sizeof(__u64)];
        char rbuf[3 * sizeof(__u64)];

        if (!uuid || !stat)
                return -EINVAL;

        switch (rc) {
        case 0:
                if (flags & MNTDF_INODES) {
                        avail = stat->os_ffree;
                        used = stat->os_files - stat->os_ffree;
                        total = stat->os_files;
                } else {
                        int shift = flags & MNTDF_COOKED ? 0 : 10;

                        avail = (stat->os_bavail * stat->os_bsize) >> shift;
                        used  = ((stat->os_blocks - stat->os_bfree) *
                                 stat->os_bsize) >> shift;
                        total = (stat->os_blocks * stat->os_bsize) >> shift;
                }

                ratio = obd_statfs_ratio(stat, flags & MNTDF_INODES);

                if (flags & MNTDF_COOKED) {
                        int i;
                        double cook_val;

                        cook_val = (double)total;
                        i = COOK(cook_val);
                        if (i > 0)
                                snprintf(tbuf, sizeof(tbuf), HDF, cook_val,
                                         suffix[i - 1]);
                        else
                                snprintf(tbuf, sizeof(tbuf), CDF, total);

                        cook_val = (double)used;
                        i = COOK(cook_val);
                        if (i > 0)
                                snprintf(ubuf, sizeof(ubuf), HDF, cook_val,
                                         suffix[i - 1]);
                        else
                                snprintf(ubuf, sizeof(ubuf), CDF, used);

                        cook_val = (double)avail;
                        i = COOK(cook_val);
                        if (i > 0)
                                snprintf(abuf, sizeof(abuf), HDF, cook_val,
                                         suffix[i - 1]);
                        else
                                snprintf(abuf, sizeof(abuf), CDF, avail);
                } else {
                        snprintf(tbuf, sizeof(tbuf), CDF, total);
                        snprintf(ubuf, sizeof(tbuf), CDF, used);
                        snprintf(abuf, sizeof(tbuf), CDF, avail);
                }

                sprintf(rbuf, RDF, ratio);
                printf(UUF" "CSF" "CSF" "CSF" "RSF" %-s",
                       uuid, tbuf, ubuf, abuf, rbuf, mntdir);
                if (type)
                        printf("[%s:%d]", type, index);

                if (stat->os_state) {
                        /*
                         * Each character represents the matching
                         * OS_STATE_* bit.
                         */
                        const char state_names[] = "DRSI";
                        __u32      state;
                        __u32      i;

                        printf(" ");
                        for (i = 0, state = stat->os_state;
                             state && i < sizeof(state_names); i++) {
                                if (!(state & (1 << i)))
                                        continue;
                                printf("%c", state_names[i]);
                                state ^= 1 << i;
                        }
                }

                printf("\n");
                break;
        case -ENODATA:
                printf(UUF": inactive device\n", uuid);
                break;
        default:
                printf(UUF": %s\n", uuid, strerror(-rc));
                break;
        }

        return 0;
}

struct ll_stat_type {
        int   st_op;
        char *st_name;
};

#define LL_STATFS_MAX   LOV_MAX_STRIPE_COUNT

struct ll_statfs_data {
        int                     sd_index;
        struct obd_statfs       sd_st;
};

struct ll_statfs_buf {
        int                     sb_count;
        struct ll_statfs_data   sb_buf[LL_STATFS_MAX];
};

static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
                 int ops, struct ll_statfs_buf *lsb)
{
        struct obd_statfs stat_buf, sum = { .os_bsize = 1 };
        struct obd_uuid uuid_buf;
        char *poolname = NULL;
        struct ll_stat_type types[] = {
                { .st_op = LL_STATFS_LMV,       .st_name = "MDT" },
                { .st_op = LL_STATFS_LOV,       .st_name = "OST" },
                { .st_name = NULL } };
        struct ll_stat_type *tp;
        __u64 ost_ffree = 0;
        __u32 index;
        __u32 type;
        int fd;
        int rc = 0;
        int rc2;

        if (pool) {
                poolname = strchr(pool, '.');
                if (poolname != NULL) {
                        if (strncmp(fsname, pool, strlen(fsname))) {
                                fprintf(stderr, "filesystem name incorrect\n");
                                return -ENODEV;
                        }
                        poolname++;
                } else
                        poolname = pool;
        }

        fd = open(mntdir, O_RDONLY);
        if (fd < 0) {
                rc = -errno;
                fprintf(stderr, "%s: cannot open '%s': %s\n", progname, mntdir,
                        strerror(errno));
                return rc;
        }

        if (flags & MNTDF_SHOW) {
                if (flags & MNTDF_INODES)
                        printf(UUF" "CSF" "CSF" "CSF" "RSF" %-s\n",
                               "UUID", "Inodes", "IUsed", "IFree",
                               "IUse%", "Mounted on");
                else
                        printf(UUF" "CSF" "CSF" "CSF" "RSF" %-s\n",
                               "UUID",
                               flags & MNTDF_COOKED ? "bytes" : "1K-blocks",
                               "Used", "Available", "Use%", "Mounted on");
        }

        for (tp = types; tp->st_name != NULL; tp++) {
                bool have_ost = false;

                if (!(tp->st_op & ops))
                        continue;

                for (index = 0; ; index++) {
                        memset(&stat_buf, 0, sizeof(struct obd_statfs));
                        memset(&uuid_buf, 0, sizeof(struct obd_uuid));
                        type = flags & MNTDF_LAZY ?
                                tp->st_op | LL_STATFS_NODELAY : tp->st_op;
                        rc2 = llapi_obd_fstatfs(fd, type, index,
                                               &stat_buf, &uuid_buf);
                        if (rc2 == -ENODEV)
                                break;
                        if (rc2 == -EAGAIN)
                                continue;
                        if (rc2 == -ENODATA) { /* Inactive device, OK. */
                                if (!(flags & MNTDF_VERBOSE))
                                        continue;
                        } else if (rc2 < 0 && rc == 0) {
                                rc = rc2;
                        }

                        /* If we have OSTs then don't report MDT block counts.
                         * For MDT-only filesystems the expectation is that all
                         * layouts have a DoM component.  For filesystems with
                         * OSTs, files are not necessarily going to store data
                         * on MDTs, and MDT space is limited to a fraction of
                         * OST space, so don't include it in the summary.
                         */
                        if (tp->st_op == LL_STATFS_LOV && !have_ost) {
                                have_ost = true;
                                sum.os_blocks = 0;
                                sum.os_bfree = 0;
                                sum.os_bavail = 0;
                        }

                        if (poolname && tp->st_op == LL_STATFS_LOV &&
                            llapi_search_ost(fsname, poolname,
                                             obd_uuid2str(&uuid_buf)) != 1)
                                continue;

                        /* the llapi_obd_statfs() call may have returned with
                         * an error, but if it filled in uuid_buf we will at
                         * lease use that to print out a message for that OBD.
                         * If we didn't get anything in the uuid_buf, then fill
                         * it in so that we can print an error message. */
                        if (uuid_buf.uuid[0] == '\0')
                                snprintf(uuid_buf.uuid, sizeof(uuid_buf.uuid),
                                         "%s%04x", tp->st_name, index);
                        if (!rc && lsb) {
                                lsb->sb_buf[lsb->sb_count].sd_index = index;
                                lsb->sb_buf[lsb->sb_count].sd_st = stat_buf;
                                lsb->sb_count++;
                        }
                        if (flags & MNTDF_SHOW)
                                showdf(mntdir, &stat_buf,
                                       obd_uuid2str(&uuid_buf), flags,
                                       tp->st_name, index, rc2);

                        if (rc2)
                                continue;

                        if (tp->st_op == LL_STATFS_LMV) {
                                sum.os_ffree += stat_buf.os_ffree;
                                sum.os_files += stat_buf.os_files;
                        } else /* if (tp->st_op == LL_STATFS_LOV) */ {
                                ost_ffree += stat_buf.os_ffree;
                        }
                        sum.os_blocks += stat_buf.os_blocks *
                                         stat_buf.os_bsize;
                        sum.os_bfree  += stat_buf.os_bfree *
                                         stat_buf.os_bsize;
                        sum.os_bavail += stat_buf.os_bavail *
                                         stat_buf.os_bsize;
                }
        }

        close(fd);

        /* If we don't have as many objects free on the OST as inodes
         * on the MDS, we reduce the total number of inodes to
         * compensate, so that the "inodes in use" number is correct.
         * Matches ll_statfs_internal() so the results are consistent. */
        if (ost_ffree < sum.os_ffree) {
                sum.os_files = (sum.os_files - sum.os_ffree) + ost_ffree;
                sum.os_ffree = ost_ffree;
        }
        if (flags & MNTDF_SHOW) {
                printf("\n");
                showdf(mntdir, &sum, "filesystem_summary:", flags, NULL, 0, 0);
                printf("\n");
        }

        return rc;
}

static int ll_statfs_data_comp(const void *sd1, const void *sd2)
{
        const struct obd_statfs *st1 = &((const struct ll_statfs_data *)sd1)->
                                                sd_st;
        const struct obd_statfs *st2 = &((const struct ll_statfs_data *)sd2)->
                                                sd_st;
        int r1 = obd_statfs_ratio(st1, false);
        int r2 = obd_statfs_ratio(st2, false);
        int64_t result = r1 - r2;

        /* if both space usage are above 90, compare free inodes */
        if (r1 > 90 && r2 > 90)
                result = st2->os_ffree - st1->os_ffree;

        if (result < 0)
                return -1;
        else if (result == 0)
                return 0;
        else
                return 1;
}

/* functions */
static int lfs_setdirstripe(int argc, char **argv)
{
        char                    *dname;
        int                     result;
        struct lfs_setstripe_args        lsa = { 0 };
        struct llapi_stripe_param       *param = NULL;
        __u32                   mdts[LMV_MAX_STRIPE_COUNT] = { 0 };
        char                    *end;
        int                     c;
        char                    *mode_opt = NULL;
        bool                    default_stripe = false;
        mode_t                  mode = S_IRWXU | S_IRWXG | S_IRWXO;
        mode_t                  previous_mode = 0;
        bool                    delete = false;
        struct ll_statfs_buf    *lsb = NULL;
        char                    mntdir[PATH_MAX] = "";
        bool                    auto_distributed = false;

        struct option long_opts[] = {
        { .val = 'c',   .name = "count",        .has_arg = required_argument },
        { .val = 'c',   .name = "mdt-count",    .has_arg = required_argument },
        { .val = 'd',   .name = "delete",       .has_arg = no_argument },
        { .val = 'D',   .name = "default",      .has_arg = no_argument },
        { .val = 'D',   .name = "default_stripe", .has_arg = no_argument },
        { .val = 'H',   .name = "mdt-hash",     .has_arg = required_argument },
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 17, 53, 0)
        { .val = 'i',   .name = "mdt-index",    .has_arg = required_argument },
        { .val = 'i',   .name = "mdt",          .has_arg = required_argument },
#else
        { .val = 'm',   .name = "mdt-index",    .has_arg = required_argument },
        { .val = 'm',   .name = "mdt",          .has_arg = required_argument },
#endif
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
        { .val = 'i',   .name = "index",        .has_arg = required_argument },
#endif
        { .val = 'o',   .name = "mode",         .has_arg = required_argument },
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
        { .val = 't',   .name = "hash-type",    .has_arg = required_argument },
#endif
        { .val = 'T',   .name = "mdt-count",    .has_arg = required_argument },
/* setstripe { .val = 'y', .name = "yaml",      .has_arg = no_argument }, */
        { .name = NULL } };

        setstripe_args_init(&lsa);

        while ((c = getopt_long(argc, argv, "c:dDi:H:m:o:t:T:", long_opts,
                                NULL)) >= 0) {
                switch (c) {
                case 0:
                        /* Long options. */
                        break;
                case 'c':
                case 'T':
                        lsa.lsa_stripe_count = strtoul(optarg, &end, 0);
                        if (*end != '\0') {
                                fprintf(stderr,
                                        "%s %s: invalid stripe count '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'd':
                        delete = true;
                        default_stripe = true;
                        break;
                case 'D':
                        default_stripe = true;
                        break;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                case 't':
                        fprintf(stderr, "warning: '--hash-type' and '-t' "
                              "deprecated, use '--mdt-hash' or '-H' instead\n");
#endif
                case 'H':
                        lsa.lsa_pattern = check_hashtype(optarg);
                        if (lsa.lsa_pattern == 0) {
                                fprintf(stderr,
                                        "%s %s: bad stripe hash type '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'i':
#if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 17, 53, 0)
                case 'm':
#endif
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                        if (strcmp(argv[optind - 1], "--index") == 0)
                                fprintf(stderr,
                                        "%s %s: warning: '--index' deprecated, use '--mdt-index' instead\n",
                                        progname, argv[0]);
#endif
                        lsa.lsa_nr_tgts = parse_targets(mdts,
                                                sizeof(mdts) / sizeof(__u32),
                                                lsa.lsa_nr_tgts, optarg);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid MDT target(s) '%s'\n",
                                        progname, argv[0], optarg);
                                return CMD_HELP;
                        }

                        lsa.lsa_tgts = mdts;
                        if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
                                lsa.lsa_stripe_off = mdts[0];
                        break;
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 15, 53, 0)
                case 'm':
                        fprintf(stderr, "warning: '-m' is deprecated, "
                                "use '--mode' or '-o' instead\n");
#endif
                case 'o':
                        mode_opt = optarg;
                        break;
                default:
                        fprintf(stderr, "%s %s: unrecognized option '%s'\n",
                                progname, argv[0], argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (optind == argc) {
                fprintf(stderr, "%s %s: DIR must be specified\n",
                        progname, argv[0]);
                return CMD_HELP;
        }

        if (!delete && lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT &&
            lsa.lsa_stripe_count == LLAPI_LAYOUT_DEFAULT) {
                fprintf(stderr,
                        "%s %s: stripe offset and count must be specified\n",
                        progname, argv[0]);
                return CMD_HELP;
        }

        if (delete &&
            (lsa.lsa_stripe_off != LLAPI_LAYOUT_DEFAULT ||
             lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT)) {
                fprintf(stderr,
                        "%s %s: cannot specify -d with -c or -i options\n",
                        progname, argv[0]);
                return CMD_HELP;
        }

        if (mode_opt != NULL) {
                mode = strtoul(mode_opt, &end, 8);
                if (*end != '\0') {
                        fprintf(stderr,
                                "%s %s: bad MODE '%s'\n",
                                progname, argv[0], mode_opt);
                        return CMD_HELP;
                }
                previous_mode = umask(0);
        }

        /*
         * initialize stripe parameters, in case param is converted to specific,
         * i.e, 'lfs mkdir -i -1 -c N', always allocate space for lsp_tgts.
         */
        param = calloc(1, offsetof(typeof(*param),
                       lsp_tgts[lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT ?
                                lsa.lsa_stripe_count : lsa.lsa_nr_tgts]));
        if (param == NULL) {
                fprintf(stderr,
                        "%s %s: cannot allocate memory for parameters: %s\n",
                        progname, argv[0], strerror(ENOMEM));
                return CMD_HELP;
        }

        if (lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT)
                param->lsp_stripe_count = lsa.lsa_stripe_count;
        if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
                param->lsp_stripe_offset = -1;
        else
                param->lsp_stripe_offset = lsa.lsa_stripe_off;
        if (lsa.lsa_pattern != LLAPI_LAYOUT_RAID0)
                param->lsp_stripe_pattern = lsa.lsa_pattern;
        else
                param->lsp_stripe_pattern = LMV_HASH_TYPE_FNV_1A_64;
        param->lsp_pool = lsa.lsa_pool_name;
        param->lsp_is_specific = false;
        if (lsa.lsa_nr_tgts > 1) {
                if (lsa.lsa_stripe_count > 0 &&
                    lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT &&
                    lsa.lsa_stripe_count != lsa.lsa_nr_tgts) {
                        fprintf(stderr, "error: %s: stripe count %lld doesn't "
                                "match the number of MDTs: %d\n",
                                argv[0], lsa.lsa_stripe_count, lsa.lsa_nr_tgts);
                        free(param);
                        return CMD_HELP;
                }

                param->lsp_is_specific = true;
                param->lsp_stripe_count = lsa.lsa_nr_tgts;
                memcpy(param->lsp_tgts, mdts, sizeof(*mdts) * lsa.lsa_nr_tgts);
        }

        dname = argv[optind];
        do {
                if (default_stripe) {
                        result = llapi_dir_set_default_lmv(dname, param);
                } else {
                        /* if current \a dname isn't under the same \a mntdir
                         * as the last one, and the last one was
                         * auto-distributed, restore \a param.
                         */
                        if (mntdir[0] != '\0' &&
                            strncmp(dname, mntdir, strlen(mntdir)) &&
                            auto_distributed) {
                                param->lsp_is_specific = false;
                                param->lsp_stripe_offset = -1;
                                auto_distributed = false;
                        }

                        if (!param->lsp_is_specific &&
                            param->lsp_stripe_offset == -1) {
                                char path[PATH_MAX] = "";

                                if (!lsb) {
                                        lsb = malloc(sizeof(*lsb));
                                        if (!lsb) {
                                                result = -ENOMEM;
                                                break;
                                        }
                                }
                                lsb->sb_count = 0;

                                /* use mntdir for dirname() temporarily */
                                strncpy(mntdir, dname, sizeof(mntdir));
                                if (!realpath(dirname(mntdir), path)) {
                                        result = -errno;
                                        fprintf(stderr,
                                                "error: invalid path '%s': %s\n",
                                                argv[optind], strerror(errno));
                                        break;
                                }
                                mntdir[0] = '\0';

                                result = llapi_search_mounts(path, 0, mntdir,
                                                             NULL);
                                if (result < 0 || mntdir[0] == '\0') {
                                        fprintf(stderr,
                                                "No suitable Lustre mount found\n");
                                        break;
                                }

                                result = mntdf(mntdir, NULL, NULL, 0,
                                               LL_STATFS_LMV, lsb);
                                if (result < 0)
                                        break;

                                if (param->lsp_stripe_count > lsb->sb_count) {
                                        fprintf(stderr,
                                                "error: stripe count %d is too big\n",
                                                param->lsp_stripe_count);
                                        result = -ERANGE;
                                        break;
                                }

                                qsort(lsb->sb_buf, lsb->sb_count,
                                      sizeof(struct ll_statfs_data),
                                      ll_statfs_data_comp);

                                auto_distributed = true;
                        }

                        if (auto_distributed) {
                                int r;
                                int nr = MAX(param->lsp_stripe_count,
                                             lsb->sb_count / 2);

                                /* don't use server whose usage is above 90% */
                                while (nr != param->lsp_stripe_count &&
                                       obd_statfs_ratio(&lsb->sb_buf[nr].sd_st,
                                                        false) > 90)
                                        nr = MAX(param->lsp_stripe_count,
                                                 nr / 2);

                                /* get \a r between [0, nr) */
                                r = rand() % nr;

                                param->lsp_stripe_offset =
                                        lsb->sb_buf[r].sd_index;
                                if (param->lsp_stripe_count > 1) {
                                        int i = 0;

                                        param->lsp_is_specific = true;
                                        for (; i < param->lsp_stripe_count; i++)
                                                param->lsp_tgts[(i + r) % nr] =
                                                        lsb->sb_buf[i].sd_index;
                                }
                        }

                        result = llapi_dir_create(dname, mode, param);
                }

                if (result) {
                        fprintf(stderr,
                                "%s setdirstripe: cannot create stripe dir '%s': %s\n",
                                progname, dname, strerror(-result));
                        break;
                }
                dname = argv[++optind];
        } while (dname != NULL);

        if (mode_opt != NULL)
                umask(previous_mode);

        free(lsb);
        free(param);
        return result;
}

/* functions */
static int lfs_rmentry(int argc, char **argv)
{
        char *dname;
        int   index;
        int   result = 0;

        if (argc <= 1) {
                fprintf(stderr, "error: %s: missing dirname\n",
                        argv[0]);
                return CMD_HELP;
        }

        index = 1;
        dname = argv[index];
        while (dname != NULL) {
                result = llapi_direntry_remove(dname);
                if (result) {
                        fprintf(stderr, "error: %s: remove dir entry '%s' "
                                "failed\n", argv[0], dname);
                        break;
                }
                dname = argv[++index];
        }
        return result;
}

static int lfs_mv(int argc, char **argv)
{
        struct lmv_user_md lmu = { LMV_USER_MAGIC };
        struct find_param param = {
                .fp_max_depth = -1,
                .fp_mdt_index = -1,
        };
        char *end;
        int c;
        int rc = 0;
        struct option long_opts[] = {
        { .val = 'm',   .name = "mdt",          .has_arg = required_argument },
        { .val = 'm',   .name = "mdt-index",    .has_arg = required_argument },
        { .val = 'v',   .name = "verbose",      .has_arg = no_argument },
        { .name = NULL } };

        while ((c = getopt_long(argc, argv, "m:M:v", long_opts, NULL)) != -1) {
                switch (c) {
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                case 'M':
                        fprintf(stderr, "warning: '-M' deprecated"
                                ", use '--mdt-index' or '-m' instead\n");
#endif
                case 'm':
                        lmu.lum_stripe_offset = strtoul(optarg, &end, 0);
                        if (*end != '\0') {
                                fprintf(stderr, "%s mv: bad MDT index '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'v':
                        param.fp_verbose = VERBOSE_DETAIL;
                        break;
                default:
                        fprintf(stderr, "%s mv: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (lmu.lum_stripe_offset == -1) {
                fprintf(stderr, "%s mv: MDT index must be specified\n",
                        progname);
                return CMD_HELP;
        }

        if (optind >= argc) {
                fprintf(stderr, "%s mv: DIR must be specified\n", progname);
                return CMD_HELP;
        }


        /* initialize migrate mdt parameters */
        param.fp_lmv_md = &lmu;
        param.fp_migrate = 1;
        rc = llapi_migrate_mdt(argv[optind], &param);
        if (rc != 0)
                fprintf(stderr, "%s mv: cannot migrate '%s' to MDT%04x: %s\n",
                        progname, argv[optind], param.fp_mdt_index,
                        strerror(-rc));
        return rc;
}

static int lfs_osts(int argc, char **argv)
{
        return lfs_tgts(argc, argv);
}

static int lfs_mdts(int argc, char **argv)
{
        return lfs_tgts(argc, argv);
}

static int lfs_df(int argc, char **argv)
{
        char mntdir[PATH_MAX] = {'\0'}, path[PATH_MAX] = {'\0'};
        enum mntdf_flags flags = MNTDF_SHOW;
        int ops = LL_STATFS_LMV | LL_STATFS_LOV;
        int c, rc = 0, index = 0;
        char fsname[PATH_MAX] = "", *pool_name = NULL;
        struct option long_opts[] = {
        { .val = 'h',   .name = "human-readable",
                                                .has_arg = no_argument },
        { .val = 'i',   .name = "inodes",       .has_arg = no_argument },
        { .val = 'l',   .name = "lazy",         .has_arg = no_argument },
        { .val = 'p',   .name = "pool",         .has_arg = required_argument },
        { .val = 'v',   .name = "verbose",      .has_arg = no_argument },
        { .name = NULL} };

        while ((c = getopt_long(argc, argv, "hilp:v", long_opts, NULL)) != -1) {
                switch (c) {
                case 'h':
                        flags |= MNTDF_COOKED;
                        break;
                case 'i':
                        flags |= MNTDF_INODES;
                        break;
                case 'l':
                        flags |= MNTDF_LAZY;
                        break;
                case 'p':
                        pool_name = optarg;
                        break;
                case 'v':
                        flags |= MNTDF_VERBOSE;
                        break;
                default:
                        return CMD_HELP;
                }
        }
        if (optind < argc && !realpath(argv[optind], path)) {
                rc = -errno;
                fprintf(stderr, "error: invalid path '%s': %s\n",
                        argv[optind], strerror(-rc));
                return rc;
        }

        while (!llapi_search_mounts(path, index++, mntdir, fsname)) {
                /* Check if we have a mount point */
                if (mntdir[0] == '\0')
                        continue;

                rc = mntdf(mntdir, fsname, pool_name, flags, ops, NULL);
                if (rc || path[0] != '\0')
                        break;
                fsname[0] = '\0'; /* avoid matching in next loop */
                mntdir[0] = '\0'; /* avoid matching in next loop */
        }

        return rc;
}

static int lfs_getname(int argc, char **argv)
{
        char mntdir[PATH_MAX] = "", path[PATH_MAX] = "", fsname[PATH_MAX] = "";
        int rc = 0, index = 0, c;
        char buf[sizeof(struct obd_uuid)];

        while ((c = getopt(argc, argv, "h")) != -1)
                return CMD_HELP;

        if (optind == argc) { /* no paths specified, get all paths. */
                while (!llapi_search_mounts(path, index++, mntdir, fsname)) {
                        rc = llapi_getname(mntdir, buf, sizeof(buf));
                        if (rc < 0) {
                                fprintf(stderr,
                                        "cannot get name for `%s': %s\n",
                                        mntdir, strerror(-rc));
                                break;
                        }

                        printf("%s %s\n", buf, mntdir);

                        path[0] = fsname[0] = mntdir[0] = 0;
                }
        } else { /* paths specified, only attempt to search these. */
                for (; optind < argc; optind++) {
                        rc = llapi_getname(argv[optind], buf, sizeof(buf));
                        if (rc < 0) {
                                fprintf(stderr,
                                        "cannot get name for `%s': %s\n",
                                        argv[optind], strerror(-rc));
                                break;
                        }

                        printf("%s %s\n", buf, argv[optind]);
                }
        }
        return rc;
}

static int lfs_check(int argc, char **argv)
{
        char mntdir[PATH_MAX] = {'\0'};
        int num_types = 1;
        char *obd_types[3];
        char obd_type1[4];
        char obd_type2[4];
        char obd_type3[4];
        int rc;

        if (argc != 2) {
                fprintf(stderr, "%s check: server type must be specified\n",
                        progname);
                return CMD_HELP;
        }

        obd_types[0] = obd_type1;
        obd_types[1] = obd_type2;
        obd_types[2] = obd_type3;

        if (strcmp(argv[1], "osts") == 0) {
                strcpy(obd_types[0], "osc");
        } else if (strcmp(argv[1], "mdts") == 0 ||
                   strcmp(argv[1], "mds") == 0) {
                strcpy(obd_types[0], "mdc");
        } else if (strcmp(argv[1], "mgts") == 0) {
                strcpy(obd_types[0], "mgc");
        } else if (strcmp(argv[1], "all") == 0 ||
                   strcmp(argv[1], "servers") == 0) {
                num_types = 3;
                strcpy(obd_types[0], "osc");
                strcpy(obd_types[1], "mdc");
                strcpy(obd_types[2], "mgc");
        } else {
                fprintf(stderr, "%s check: unrecognized option '%s'\n",
                        progname, argv[1]);
                return CMD_HELP;
        }

        rc = llapi_search_mounts(NULL, 0, mntdir, NULL);
        if (rc < 0 || mntdir[0] == '\0') {
                fprintf(stderr,
                        "%s check: cannot find mounted Lustre filesystem: %s\n",
                        progname, (rc < 0) ? strerror(-rc) : strerror(ENODEV));
                return rc;
        }

        rc = llapi_target_check(num_types, obd_types, mntdir);
        if (rc)
                fprintf(stderr, "%s check: cannot check target '%s': %s\n",
                        progname, argv[1], strerror(-rc));

        return rc;

}

#ifdef HAVE_SYS_QUOTA_H
#define ARG2INT(nr, str, msg)                                           \
do {                                                                    \
        char *endp;                                                     \
        nr = strtol(str, &endp, 0);                                     \
        if (*endp != '\0') {                                            \
                fprintf(stderr, "%s: bad %s '%s'\n",                    \
                        progname, msg, str);                            \
                return CMD_HELP;                                        \
        }                                                               \
} while (0)

#define ADD_OVERFLOW(a,b) ((a + b) < a) ? (a = ULONG_MAX) : (a = a + b)

/* Convert format time string "XXwXXdXXhXXmXXs" into seconds value
 * returns the value or ULONG_MAX on integer overflow or incorrect format
 * Notes:
 *        1. the order of specifiers is arbitrary (may be: 5w3s or 3s5w)
 *        2. specifiers may be encountered multiple times (2s3s is 5 seconds)
 *        3. empty integer value is interpreted as 0
 */
static unsigned long str2sec(const char* timestr)
{
        const char spec[] = "smhdw";
        const unsigned long mult[] = {1, 60, 60*60, 24*60*60, 7*24*60*60};
        unsigned long val = 0;
        char *tail;

        if (strpbrk(timestr, spec) == NULL) {
                /* no specifiers inside the time string,
                   should treat it as an integer value */
                val = strtoul(timestr, &tail, 10);
                return *tail ? ULONG_MAX : val;
        }

        /* format string is XXwXXdXXhXXmXXs */
        while (*timestr) {
                unsigned long v;
                int ind;
                char* ptr;

                v = strtoul(timestr, &tail, 10);
                if (v == ULONG_MAX || *tail == '\0')
                        /* value too large (ULONG_MAX or more)
                           or missing specifier */
                        goto error;

                ptr = strchr(spec, *tail);
                if (ptr == NULL)
                        /* unknown specifier */
                        goto error;

                ind = ptr - spec;

                /* check if product will overflow the type */
                if (!(v < ULONG_MAX / mult[ind]))
                        goto error;

                ADD_OVERFLOW(val, mult[ind] * v);
                if (val == ULONG_MAX)
                        goto error;

                timestr = tail + 1;
        }

        return val;

error:
        return ULONG_MAX;
}

#define ARG2ULL(nr, str, def_units)                                     \
do {                                                                    \
        unsigned long long limit, units = def_units;                    \
        int rc;                                                         \
                                                                        \
        rc = llapi_parse_size(str, &limit, &units, 1);                  \
        if (rc < 0) {                                                   \
                fprintf(stderr, "%s: invalid limit '%s'\n",             \
                        progname, str);                                 \
                return CMD_HELP;                                        \
        }                                                               \
        nr = limit;                                                     \
} while (0)

static inline int has_times_option(int argc, char **argv)
{
        int i;

        for (i = 1; i < argc; i++)
                if (!strcmp(argv[i], "-t"))
                        return 1;

        return 0;
}

int lfs_setquota_times(int argc, char **argv)
{
        int c, rc;
        struct if_quotactl qctl;
        char *mnt, *obd_type = (char *)qctl.obd_type;
        struct obd_dqblk *dqb = &qctl.qc_dqblk;
        struct obd_dqinfo *dqi = &qctl.qc_dqinfo;
        struct option long_opts[] = {
        { .val = 'b',   .name = "block-grace",  .has_arg = required_argument },
        { .val = 'g',   .name = "group",        .has_arg = no_argument },
        { .val = 'i',   .name = "inode-grace",  .has_arg = required_argument },
        { .val = 'p',   .name = "projid",       .has_arg = no_argument },
        { .val = 't',   .name = "times",        .has_arg = no_argument },
        { .val = 'u',   .name = "user",         .has_arg = no_argument },
        { .name = NULL } };
        int qtype;

        memset(&qctl, 0, sizeof(qctl));
        qctl.qc_cmd  = LUSTRE_Q_SETINFO;
        qctl.qc_type = ALLQUOTA;

        while ((c = getopt_long(argc, argv, "b:gi:ptu",
                                long_opts, NULL)) != -1) {
                switch (c) {
                case 'u':
                        qtype = USRQUOTA;
                        goto quota_type;
                case 'g':
                        qtype = GRPQUOTA;
                        goto quota_type;
                case 'p':
                        qtype = PRJQUOTA;
quota_type:
                        if (qctl.qc_type != ALLQUOTA) {
                                fprintf(stderr, "error: -u/g/p can't be used "
                                                "more than once\n");
                                return CMD_HELP;
                        }
                        qctl.qc_type = qtype;
                        break;
                case 'b':
                        if ((dqi->dqi_bgrace = str2sec(optarg)) == ULONG_MAX) {
                                fprintf(stderr, "error: bad block-grace: %s\n",
                                        optarg);
                                return CMD_HELP;
                        }
                        dqb->dqb_valid |= QIF_BTIME;
                        break;
                case 'i':
                        if ((dqi->dqi_igrace = str2sec(optarg)) == ULONG_MAX) {
                                fprintf(stderr, "error: bad inode-grace: %s\n",
                                        optarg);
                                return CMD_HELP;
                        }
                        dqb->dqb_valid |= QIF_ITIME;
                        break;
                case 't': /* Yes, of course! */
                        break;
                default: /* getopt prints error message for us when opterr != 0 */
                        return CMD_HELP;
                }
        }

        if (qctl.qc_type == ALLQUOTA) {
                fprintf(stderr, "error: neither -u, -g nor -p specified\n");
                return CMD_HELP;
        }

        if (optind != argc - 1) {
                fprintf(stderr, "error: unexpected parameters encountered\n");
                return CMD_HELP;
        }

        if ((dqb->dqb_valid | QIF_BTIME && dqi->dqi_bgrace >= UINT_MAX) ||
            (dqb->dqb_valid | QIF_ITIME && dqi->dqi_igrace >= UINT_MAX)) {
                fprintf(stderr, "error: grace time is too large\n");
                return CMD_HELP;
        }

        mnt = argv[optind];
        rc = llapi_quotactl(mnt, &qctl);
        if (rc) {
                if (*obd_type)
                        fprintf(stderr, "%s %s ", obd_type,
                                obd_uuid2str(&qctl.obd_uuid));
                fprintf(stderr, "setquota failed: %s\n", strerror(-rc));
                return rc;
        }

        return 0;
}

#define BSLIMIT (1 << 0)
#define BHLIMIT (1 << 1)
#define ISLIMIT (1 << 2)
#define IHLIMIT (1 << 3)

int lfs_setquota(int argc, char **argv)
{
        int c, rc = 0;
        struct if_quotactl qctl;
        char *mnt, *obd_type = (char *)qctl.obd_type;
        struct obd_dqblk *dqb = &qctl.qc_dqblk;
        struct option long_opts[] = {
        { .val = 'b',   .name = "block-softlimit",
                                                .has_arg = required_argument },
        { .val = 'B',   .name = "block-hardlimit",
                                                .has_arg = required_argument },
        { .val = 'd',   .name = "default",      .has_arg = no_argument },
        { .val = 'g',   .name = "group",        .has_arg = required_argument },
        { .val = 'G',   .name = "default-grp",  .has_arg = no_argument },
        { .val = 'i',   .name = "inode-softlimit",
                                                .has_arg = required_argument },
        { .val = 'I',   .name = "inode-hardlimit",
                                                .has_arg = required_argument },
        { .val = 'p',   .name = "projid",       .has_arg = required_argument },
        { .val = 'P',   .name = "default-prj",  .has_arg = no_argument },
        { .val = 'u',   .name = "user",         .has_arg = required_argument },
        { .val = 'U',   .name = "default-usr",  .has_arg = no_argument },
        { .name = NULL } };
        unsigned limit_mask = 0;
        char *endptr;
        bool use_default = false;
        int qtype;

        if (has_times_option(argc, argv))
                return lfs_setquota_times(argc, argv);

        memset(&qctl, 0, sizeof(qctl));
        qctl.qc_cmd  = LUSTRE_Q_SETQUOTA;
        qctl.qc_type = ALLQUOTA; /* ALLQUOTA makes no sense for setquota,
                                  * so it can be used as a marker that qc_type
                                  * isn't reinitialized from command line */

        while ((c = getopt_long(argc, argv, "b:B:dg:Gi:I:p:Pu:U",
                long_opts, NULL)) != -1) {
                switch (c) {
                case 'U':
                        qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = USRQUOTA;
                        qctl.qc_id = 0;
                        goto quota_type_def;
                case 'u':
                        qtype = USRQUOTA;
                        rc = name2uid(&qctl.qc_id, optarg);
                        goto quota_type;
                case 'G':
                        qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = GRPQUOTA;
                        qctl.qc_id = 0;
                        goto quota_type_def;
                case 'g':
                        qtype = GRPQUOTA;
                        rc = name2gid(&qctl.qc_id, optarg);
                        goto quota_type;
                case 'P':
                        qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = PRJQUOTA;
                        qctl.qc_id = 0;
                        goto quota_type_def;
                case 'p':
                        qtype = PRJQUOTA;
                        rc = name2projid(&qctl.qc_id, optarg);
quota_type:
                        if (rc) {
                                qctl.qc_id = strtoul(optarg, &endptr, 10);
                                if (*endptr != '\0') {
                                        fprintf(stderr, "%s setquota: invalid"
                                                " id '%s'\n", progname, optarg);
                                        return -1;
                                }
                        }

                        if (qctl.qc_id == 0) {
                                fprintf(stderr, "%s setquota: can't set quota"
                                        " for root usr/group/project.\n",
                                        progname);
                                return -1;
                        }

quota_type_def:
                        if (qctl.qc_type != ALLQUOTA) {
                                fprintf(stderr,
                                        "%s setquota: only one of -u, -U, -g,"
                                        " -G, -p or -P may be specified\n",
                                        progname);
                                return CMD_HELP;
                        }
                        qctl.qc_type = qtype;
                        break;
                case 'd':
                        qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
                        use_default = true;
                        break;
                case 'b':
                        ARG2ULL(dqb->dqb_bsoftlimit, optarg, 1024);
                        dqb->dqb_bsoftlimit >>= 10;
                        limit_mask |= BSLIMIT;
                        if (dqb->dqb_bsoftlimit &&
                            dqb->dqb_bsoftlimit <= 1024) /* <= 1M? */
                                fprintf(stderr,
                                        "%s setquota: warning: block softlimit '%llu' smaller than minimum qunit size\n"
                                        "See '%s help setquota' or Lustre manual for details\n",
                                        progname, dqb->dqb_bsoftlimit,
                                        progname);
                        break;
                case 'B':
                        ARG2ULL(dqb->dqb_bhardlimit, optarg, 1024);
                        dqb->dqb_bhardlimit >>= 10;
                        limit_mask |= BHLIMIT;
                        if (dqb->dqb_bhardlimit &&
                            dqb->dqb_bhardlimit <= 1024) /* <= 1M? */
                                fprintf(stderr,
                                        "%s setquota: warning: block hardlimit '%llu' smaller than minimum qunit size\n"
                                        "See '%s help setquota' or Lustre manual for details\n",
                                        progname, dqb->dqb_bhardlimit,
                                        progname);
                        break;
                case 'i':
                        ARG2ULL(dqb->dqb_isoftlimit, optarg, 1);
                        limit_mask |= ISLIMIT;
                        if (dqb->dqb_isoftlimit &&
                            dqb->dqb_isoftlimit <= 1024) /* <= 1K inodes? */
                                fprintf(stderr,
                                        "%s setquota: warning: inode softlimit '%llu' smaller than minimum qunit size\n"
                                        "See '%s help setquota' or Lustre manual for details\n",
                                        progname, dqb->dqb_isoftlimit,
                                        progname);
                        break;
                case 'I':
                        ARG2ULL(dqb->dqb_ihardlimit, optarg, 1);
                        limit_mask |= IHLIMIT;
                        if (dqb->dqb_ihardlimit &&
                            dqb->dqb_ihardlimit <= 1024) /* <= 1K inodes? */
                                fprintf(stderr,
                                        "%s setquota: warning: inode hardlimit '%llu' smaller than minimum qunit size\n"
                                        "See '%s help setquota' or Lustre manual for details\n",
                                        progname, dqb->dqb_ihardlimit,
                                        progname);
                        break;
                default:
                        fprintf(stderr,
                                "%s setquota: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (qctl.qc_type == ALLQUOTA) {
                fprintf(stderr,
                        "%s setquota: either -u or -g must be specified\n",
                        progname);
                return CMD_HELP;
        }

        if (!use_default && limit_mask == 0) {
                fprintf(stderr,
                        "%s setquota: at least one limit must be specified\n",
                        progname);
                return CMD_HELP;
        }

        if (use_default && limit_mask != 0) {
                fprintf(stderr,
                        "%s setquota: limits should not be specified when"
                        " using default quota\n",
                        progname);
                return CMD_HELP;
        }

        if (use_default && qctl.qc_id == 0) {
                fprintf(stderr,
                        "%s setquota: can not set default quota for root"
                        " user/group/project\n",
                        progname);
                return CMD_HELP;
        }

        if (optind != argc - 1) {
                fprintf(stderr,
                        "%s setquota: filesystem not specified or unexpected argument '%s'\n",
                        progname, argv[optind]);
                return CMD_HELP;
        }

        mnt = argv[optind];

        if (use_default) {
                dqb->dqb_bhardlimit = 0;
                dqb->dqb_bsoftlimit = 0;
                dqb->dqb_ihardlimit = 0;
                dqb->dqb_isoftlimit = 0;
                dqb->dqb_itime = 0;
                dqb->dqb_btime = 0;
                dqb->dqb_valid |= QIF_LIMITS | QIF_TIMES;
        } else if ((!(limit_mask & BHLIMIT) ^ !(limit_mask & BSLIMIT)) ||
                   (!(limit_mask & IHLIMIT) ^ !(limit_mask & ISLIMIT))) {
                /* sigh, we can't just set blimits/ilimits */
                struct if_quotactl tmp_qctl = {.qc_cmd  = LUSTRE_Q_GETQUOTA,
                                               .qc_type = qctl.qc_type,
                                               .qc_id   = qctl.qc_id};

                rc = llapi_quotactl(mnt, &tmp_qctl);
                if (rc < 0)
                        return rc;

                if (!(limit_mask & BHLIMIT))
                        dqb->dqb_bhardlimit = tmp_qctl.qc_dqblk.dqb_bhardlimit;
                if (!(limit_mask & BSLIMIT))
                        dqb->dqb_bsoftlimit = tmp_qctl.qc_dqblk.dqb_bsoftlimit;
                if (!(limit_mask & IHLIMIT))
                        dqb->dqb_ihardlimit = tmp_qctl.qc_dqblk.dqb_ihardlimit;
                if (!(limit_mask & ISLIMIT))
                        dqb->dqb_isoftlimit = tmp_qctl.qc_dqblk.dqb_isoftlimit;

                /* Keep grace times if we have got no softlimit arguments */
                if ((limit_mask & BHLIMIT) && !(limit_mask & BSLIMIT)) {
                        dqb->dqb_valid |= QIF_BTIME;
                        dqb->dqb_btime = tmp_qctl.qc_dqblk.dqb_btime;
                }

                if ((limit_mask & IHLIMIT) && !(limit_mask & ISLIMIT)) {
                        dqb->dqb_valid |= QIF_ITIME;
                        dqb->dqb_itime = tmp_qctl.qc_dqblk.dqb_itime;
                }
        }

        dqb->dqb_valid |= (limit_mask & (BHLIMIT | BSLIMIT)) ? QIF_BLIMITS : 0;
        dqb->dqb_valid |= (limit_mask & (IHLIMIT | ISLIMIT)) ? QIF_ILIMITS : 0;

        rc = llapi_quotactl(mnt, &qctl);
        if (rc) {
                if (*obd_type)
                        fprintf(stderr,
                                "%s setquota: cannot quotactl '%s' '%s': %s",
                                progname, obd_type,
                                obd_uuid2str(&qctl.obd_uuid), strerror(-rc));
                return rc;
        }

        return 0;
}

/* Converts seconds value into format string
 * result is returned in buf
 * Notes:
 *        1. result is in descenting order: 1w2d3h4m5s
 *        2. zero fields are not filled (except for p. 3): 5d1s
 *        3. zero seconds value is presented as "0s"
 */
static char * __sec2str(time_t seconds, char *buf)
{
        const char spec[] = "smhdw";
        const unsigned long mult[] = {1, 60, 60*60, 24*60*60, 7*24*60*60};
        unsigned long c;
        char *tail = buf;
        int i;

        for (i = sizeof(mult) / sizeof(mult[0]) - 1 ; i >= 0; i--) {
                c = seconds / mult[i];

                if (c > 0 || (i == 0 && buf == tail))
                        tail += snprintf(tail, 40-(tail-buf), "%lu%c", c, spec[i]);

                seconds %= mult[i];
        }

        return tail;
}

static void sec2str(time_t seconds, char *buf, int rc)
{
        char *tail = buf;

        if (rc)
                *tail++ = '[';

        tail = __sec2str(seconds, tail);

        if (rc && tail - buf < 39) {
                *tail++ = ']';
                *tail++ = 0;
        }
}

static void diff2str(time_t seconds, char *buf, time_t now)
{

        buf[0] = 0;
        if (!seconds)
                return;
        if (seconds <= now) {
                strcpy(buf, "none");
                return;
        }
        __sec2str(seconds - now, buf);
}

static void print_quota_title(char *name, struct if_quotactl *qctl,
                              bool human_readable, bool show_default)
{
        if (show_default) {
                printf("Disk default %s quota:\n", qtype_name(qctl->qc_type));
                printf("%15s %8s%8s%8s %8s%8s%8s\n",
                       "Filesystem", "bquota", "blimit", "bgrace",
                       "iquota", "ilimit", "igrace");
        } else {
                printf("Disk quotas for %s %s (%cid %u):\n",
                       qtype_name(qctl->qc_type), name,
                       *qtype_name(qctl->qc_type), qctl->qc_id);
                printf("%15s%8s %7s%8s%8s%8s %7s%8s%8s\n",
                       "Filesystem", human_readable ? "used" : "kbytes",
                       "quota", "limit", "grace",
                       "files", "quota", "limit", "grace");
        }
}

static void kbytes2str(__u64 num, char *buf, int buflen, bool h)
{
        if (!h) {
                snprintf(buf, buflen, "%ju", (uintmax_t)num);
        } else {
                if (num >> 40)
                        snprintf(buf, buflen, "%5.4gP",
                                 (double)num / ((__u64)1 << 40));
                else if (num >> 30)
                        snprintf(buf, buflen, "%5.4gT",
                                 (double)num / (1 << 30));
                else if (num >> 20)
                        snprintf(buf, buflen, "%5.4gG",
                                 (double)num / (1 << 20));
                else if (num >> 10)
                        snprintf(buf, buflen, "%5.4gM",
                                 (double)num / (1 << 10));
                else
                        snprintf(buf, buflen, "%ju%s", (uintmax_t)num, "k");
        }
}

#define STRBUF_LEN      32
static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
                        int rc, bool h, bool show_default)
{
        time_t now;

        time(&now);

        if (qctl->qc_cmd == LUSTRE_Q_GETQUOTA || qctl->qc_cmd == Q_GETOQUOTA ||
            qctl->qc_cmd == LUSTRE_Q_GETDEFAULT) {
                int bover = 0, iover = 0;
                struct obd_dqblk *dqb = &qctl->qc_dqblk;
                char numbuf[3][STRBUF_LEN];
                char timebuf[40];
                char strbuf[STRBUF_LEN];

                if (dqb->dqb_bhardlimit &&
                    lustre_stoqb(dqb->dqb_curspace) >= dqb->dqb_bhardlimit) {
                        bover = 1;
                } else if (dqb->dqb_bsoftlimit && dqb->dqb_btime) {
                        if (dqb->dqb_btime > now) {
                                bover = 2;
                        } else {
                                bover = 3;
                        }
                }

                if (dqb->dqb_ihardlimit &&
                    dqb->dqb_curinodes >= dqb->dqb_ihardlimit) {
                        iover = 1;
                } else if (dqb->dqb_isoftlimit && dqb->dqb_itime) {
                        if (dqb->dqb_itime > now) {
                                iover = 2;
                        } else {
                                iover = 3;
                        }
                }


                if (strlen(mnt) > 15)
                        printf("%s\n%15s", mnt, "");
                else
                        printf("%15s", mnt);

                if (bover)
                        diff2str(dqb->dqb_btime, timebuf, now);
                else if (show_default)
                        snprintf(timebuf, sizeof(timebuf), "%llu",
                                 dqb->dqb_btime);

                kbytes2str(lustre_stoqb(dqb->dqb_curspace),
                           strbuf, sizeof(strbuf), h);
                if (rc == -EREMOTEIO)
                        sprintf(numbuf[0], "%s*", strbuf);
                else
                        sprintf(numbuf[0], (dqb->dqb_valid & QIF_SPACE) ?
                                "%s" : "[%s]", strbuf);

                kbytes2str(dqb->dqb_bsoftlimit, strbuf, sizeof(strbuf), h);
                if (type == QC_GENERAL)
                        sprintf(numbuf[1], (dqb->dqb_valid & QIF_BLIMITS) ?
                                "%s" : "[%s]", strbuf);
                else
                        sprintf(numbuf[1], "%s", "-");

                kbytes2str(dqb->dqb_bhardlimit, strbuf, sizeof(strbuf), h);
                sprintf(numbuf[2], (dqb->dqb_valid & QIF_BLIMITS) ?
                        "%s" : "[%s]", strbuf);

                if (show_default)
                        printf(" %6s %7s %7s", numbuf[1], numbuf[2], timebuf);
                else
                        printf(" %7s%c %6s %7s %7s",
                               numbuf[0], bover ? '*' : ' ', numbuf[1],
                               numbuf[2], bover > 1 ? timebuf : "-");


                if (iover)
                        diff2str(dqb->dqb_itime, timebuf, now);
                else if (show_default)
                        snprintf(timebuf, sizeof(timebuf), "%llu",
                                 dqb->dqb_itime);

                snprintf(numbuf[0], sizeof(numbuf),
                         (dqb->dqb_valid & QIF_INODES) ? "%ju" : "[%ju]",
                         (uintmax_t)dqb->dqb_curinodes);

                if (type == QC_GENERAL)
                        sprintf(numbuf[1], (dqb->dqb_valid & QIF_ILIMITS) ?
                                "%ju" : "[%ju]",
                                (uintmax_t)dqb->dqb_isoftlimit);
                else
                        sprintf(numbuf[1], "%s", "-");

                sprintf(numbuf[2], (dqb->dqb_valid & QIF_ILIMITS) ?
                        "%ju" : "[%ju]", (uintmax_t)dqb->dqb_ihardlimit);

                if (show_default)
                        printf(" %6s %7s %7s", numbuf[1], numbuf[2], timebuf);
                else if (type != QC_OSTIDX)
                        printf(" %7s%c %6s %7s %7s",
                               numbuf[0], iover ? '*' : ' ', numbuf[1],
                               numbuf[2], iover > 1 ? timebuf : "-");
                else
                        printf(" %7s %7s %7s %7s", "-", "-", "-", "-");
                printf("\n");

        } else if (qctl->qc_cmd == LUSTRE_Q_GETINFO ||
                   qctl->qc_cmd == Q_GETOINFO) {
                char bgtimebuf[40];
                char igtimebuf[40];

                sec2str(qctl->qc_dqinfo.dqi_bgrace, bgtimebuf, rc);
                sec2str(qctl->qc_dqinfo.dqi_igrace, igtimebuf, rc);
                printf("Block grace time: %s; Inode grace time: %s\n",
                       bgtimebuf, igtimebuf);
        }
}

static int print_obd_quota(char *mnt, struct if_quotactl *qctl, int is_mdt,
                           bool h, __u64 *total)
{
        int rc = 0, rc1 = 0, count = 0;
        __u32 valid = qctl->qc_valid;

        rc = llapi_get_obd_count(mnt, &count, is_mdt);
        if (rc) {
                fprintf(stderr, "can not get %s count: %s\n",
                        is_mdt ? "mdt": "ost", strerror(-rc));
                return rc;
        }

        for (qctl->qc_idx = 0; qctl->qc_idx < count; qctl->qc_idx++) {
                qctl->qc_valid = is_mdt ? QC_MDTIDX : QC_OSTIDX;
                rc = llapi_quotactl(mnt, qctl);
                if (rc) {
                        /* It is remote client case. */
                        if (rc == -EOPNOTSUPP) {
                                rc = 0;
                                goto out;
                        }

                        if (!rc1)
                                rc1 = rc;
                        fprintf(stderr, "quotactl %s%d failed.\n",
                                is_mdt ? "mdt": "ost", qctl->qc_idx);
                        continue;
                }

                print_quota(obd_uuid2str(&qctl->obd_uuid), qctl,
                            qctl->qc_valid, 0, h, false);
                *total += is_mdt ? qctl->qc_dqblk.dqb_ihardlimit :
                                   qctl->qc_dqblk.dqb_bhardlimit;
        }
out:
        qctl->qc_valid = valid;
        return rc ? : rc1;
}

static int get_print_quota(char *mnt, char *name, struct if_quotactl *qctl,
                           int verbose, int quiet, bool human_readable,
                           bool show_default)
{
        int rc1 = 0, rc2 = 0, rc3 = 0;
        char *obd_type = (char *)qctl->obd_type;
        char *obd_uuid = (char *)qctl->obd_uuid.uuid;
        __u64 total_ialloc = 0, total_balloc = 0;
        bool use_default_for_blk = false;
        bool use_default_for_file = false;
        int inacc;

        rc1 = llapi_quotactl(mnt, qctl);
        if (rc1 < 0) {
                switch (rc1) {
                case -ESRCH:
                        fprintf(stderr, "%s quotas are not enabled.\n",
                                qtype_name(qctl->qc_type));
                        goto out;
                case -EPERM:
                        fprintf(stderr, "Permission denied.\n");
                case -ENODEV:
                case -ENOENT:
                        /* We already got error message. */
                        goto out;
                default:
                        fprintf(stderr, "Unexpected quotactl error: %s\n",
                                strerror(-rc1));
                }
        }

        if (!show_default && qctl->qc_id == 0) {
                qctl->qc_dqblk.dqb_bhardlimit = 0;
                qctl->qc_dqblk.dqb_bsoftlimit = 0;
                qctl->qc_dqblk.dqb_ihardlimit = 0;
                qctl->qc_dqblk.dqb_isoftlimit = 0;
                qctl->qc_dqblk.dqb_btime = 0;
                qctl->qc_dqblk.dqb_itime = 0;
                qctl->qc_dqblk.dqb_valid |= QIF_LIMITS | QIF_TIMES;
        }

        if (qctl->qc_dqblk.dqb_valid & QIF_BTIME &&
            LQUOTA_FLAG(qctl->qc_dqblk.dqb_btime) & LQUOTA_FLAG_DEFAULT) {
                use_default_for_blk = true;
                qctl->qc_dqblk.dqb_btime &= LQUOTA_GRACE_MASK;
        }

        if (qctl->qc_dqblk.dqb_valid & QIF_ITIME &&
            LQUOTA_FLAG(qctl->qc_dqblk.dqb_itime) & LQUOTA_FLAG_DEFAULT) {
                use_default_for_file = true;
                qctl->qc_dqblk.dqb_itime &= LQUOTA_GRACE_MASK;
        }

        if ((qctl->qc_cmd == LUSTRE_Q_GETQUOTA ||
             qctl->qc_cmd == LUSTRE_Q_GETDEFAULT) && !quiet)
                print_quota_title(name, qctl, human_readable, show_default);

        if (rc1 && *obd_type)
                fprintf(stderr, "%s %s ", obd_type, obd_uuid);

        if (qctl->qc_valid != QC_GENERAL)
                mnt = "";

        inacc = (qctl->qc_cmd == LUSTRE_Q_GETQUOTA) &&
                ((qctl->qc_dqblk.dqb_valid & (QIF_LIMITS|QIF_USAGE)) !=
                 (QIF_LIMITS|QIF_USAGE));

        print_quota(mnt, qctl, QC_GENERAL, rc1, human_readable, show_default);

        if (!show_default && verbose &&
            qctl->qc_valid == QC_GENERAL && qctl->qc_cmd != LUSTRE_Q_GETINFO) {
                char strbuf[STRBUF_LEN];

                rc2 = print_obd_quota(mnt, qctl, 1, human_readable,
                                      &total_ialloc);
                rc3 = print_obd_quota(mnt, qctl, 0, human_readable,
                                      &total_balloc);
                kbytes2str(total_balloc, strbuf, sizeof(strbuf),
                           human_readable);
                printf("Total allocated inode limit: %ju, total "
                       "allocated block limit: %s\n", (uintmax_t)total_ialloc,
                       strbuf);
        }

        if (use_default_for_blk)
                printf("%cid %u is using default block quota setting\n",
                       *qtype_name(qctl->qc_type), qctl->qc_id);

        if (use_default_for_file)
                printf("%cid %u is using default file quota setting\n",
                       *qtype_name(qctl->qc_type), qctl->qc_id);

        if (rc1 || rc2 || rc3 || inacc)
                printf("Some errors happened when getting quota info. "
                       "Some devices may be not working or deactivated. "
                       "The data in \"[]\" is inaccurate.\n");
out:
        return rc1;

}

static int lfs_project(int argc, char **argv)
{
        int ret = 0, err = 0, c, i;
        struct project_handle_control phc = { 0 };
        enum lfs_project_ops_t op;

        phc.newline = true;
        phc.assign_projid = false;
        /* default action */
        op = LFS_PROJECT_LIST;

        while ((c = getopt(argc, argv, "p:cCsdkr0")) != -1) {
                switch (c) {
                case 'c':
                        if (op != LFS_PROJECT_LIST) {
                                fprintf(stderr,
                                        "%s: cannot specify '-c' '-C' '-s' together\n",
                                        progname);
                                return CMD_HELP;
                        }

                        op = LFS_PROJECT_CHECK;
                        break;
                case 'C':
                        if (op != LFS_PROJECT_LIST) {
                                fprintf(stderr,
                                        "%s: cannot specify '-c' '-C' '-s' together\n",
                                        progname);
                                return CMD_HELP;
                        }

                        op = LFS_PROJECT_CLEAR;
                        break;
                case 's':
                        if (op != LFS_PROJECT_LIST) {
                                fprintf(stderr,
                                        "%s: cannot specify '-c' '-C' '-s' together\n",
                                        progname);
                                return CMD_HELP;
                        }

                        phc.set_inherit = true;
                        op = LFS_PROJECT_SET;
                        break;
                case 'd':
                        phc.dironly = true;
                        break;
                case 'k':
                        phc.keep_projid = true;
                        break;
                case 'r':
                        phc.recursive = true;
                        break;
                case 'p':
                        phc.projid = strtoul(optarg, NULL, 0);
                        phc.assign_projid = true;

                        break;
                case '0':
                        phc.newline = false;
                        break;
                default:
                        fprintf(stderr, "%s: invalid option '%c'\n",
                                progname, optopt);
                        return CMD_HELP;
                }
        }

        if (phc.assign_projid && op == LFS_PROJECT_LIST) {
                op = LFS_PROJECT_SET;
                phc.set_projid = true;
        } else if (phc.assign_projid && op == LFS_PROJECT_SET) {
                phc.set_projid = true;
        }

        switch (op) {
        case LFS_PROJECT_CHECK:
                if (phc.keep_projid) {
                        fprintf(stderr,
                                "%s: '-k' is useless together with '-c'\n",
                                progname);
                        return CMD_HELP;
                }
                break;
        case LFS_PROJECT_CLEAR:
                if (!phc.newline) {
                        fprintf(stderr,
                                "%s: '-0' is useless together with '-C'\n",
                                progname);
                        return CMD_HELP;
                }
                if (phc.assign_projid) {
                        fprintf(stderr,
                                "%s: '-p' is useless together with '-C'\n",
                                progname);
                        return CMD_HELP;
                }
                break;
        case LFS_PROJECT_SET:
                if (!phc.newline) {
                        fprintf(stderr,
                                "%s: '-0' is useless together with '-s'\n",
                                progname);
                        return CMD_HELP;
                }
                if (phc.keep_projid) {
                        fprintf(stderr,
                                "%s: '-k' is useless together with '-s'\n",
                                progname);
                        return CMD_HELP;
                }
                break;
        default:
                if (!phc.newline) {
                        fprintf(stderr,
                                "%s: '-0' is useless for list operations\n",
                                progname);
                        return CMD_HELP;
                }
                break;
        }

        argv += optind;
        argc -= optind;
        if (argc == 0) {
                fprintf(stderr, "%s: missing file or directory target(s)\n",
                        progname);
                return CMD_HELP;
        }

        for (i = 0; i < argc; i++) {
                switch (op) {
                case LFS_PROJECT_CHECK:
                        err = lfs_project_check(argv[i], &phc);
                        break;
                case LFS_PROJECT_LIST:
                        err = lfs_project_list(argv[i], &phc);
                        break;
                case LFS_PROJECT_CLEAR:
                        err = lfs_project_clear(argv[i], &phc);
                        break;
                case LFS_PROJECT_SET:
                        err = lfs_project_set(argv[i], &phc);
                        break;
                default:
                        break;
                }
                if (err && !ret)
                        ret = err;
        }

        return ret;
}

static int lfs_quota(int argc, char **argv)
{
        int c;
        char *mnt, *name = NULL;
        struct if_quotactl qctl = { .qc_cmd = LUSTRE_Q_GETQUOTA,
                                    .qc_type = ALLQUOTA };
        char *obd_uuid = (char *)qctl.obd_uuid.uuid;
        int rc = 0, rc1 = 0, verbose = 0, quiet = 0;
        char *endptr;
        __u32 valid = QC_GENERAL, idx = 0;
        bool human_readable = false;
        bool show_default = false;
        int qtype;

        while ((c = getopt(argc, argv, "gGi:I:o:pPqtuUvh")) != -1) {
                switch (c) {
                case 'U':
                        show_default = true;
                case 'u':
                        qtype = USRQUOTA;
                        goto quota_type;
                case 'G':
                        show_default = true;
                case 'g':
                        qtype = GRPQUOTA;
                        goto quota_type;
                case 'P':
                        show_default = true;
                case 'p':
                        qtype = PRJQUOTA;
quota_type:
                        if (qctl.qc_type != ALLQUOTA) {
                                fprintf(stderr,
                                        "%s quota: only one of -u, -g, or -p may be specified\n",
                                        progname);
                                return CMD_HELP;
                        }
                        qctl.qc_type = qtype;
                        break;
                case 't':
                        qctl.qc_cmd = LUSTRE_Q_GETINFO;
                        break;
                case 'o':
                        valid = qctl.qc_valid = QC_UUID;
                        snprintf(obd_uuid, sizeof(qctl.obd_uuid), "%s", optarg);
                        break;
                case 'i':
                        valid = qctl.qc_valid = QC_MDTIDX;
                        idx = qctl.qc_idx = atoi(optarg);
                        if (idx == 0 && *optarg != '0') {
                                fprintf(stderr,
                                        "%s quota: invalid MDT index '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'I':
                        valid = qctl.qc_valid = QC_OSTIDX;
                        idx = qctl.qc_idx = atoi(optarg);
                        if (idx == 0 && *optarg != '0') {
                                fprintf(stderr,
                                        "%s quota: invalid OST index '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'v':
                        verbose = 1;
                        break;
                case 'q':
                        quiet = 1;
                        break;
                case 'h':
                        human_readable = true;
                        break;
                default:
                        fprintf(stderr, "%s quota: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        /* current uid/gid info for "lfs quota /path/to/lustre/mount" */
        if (qctl.qc_cmd == LUSTRE_Q_GETQUOTA && qctl.qc_type == ALLQUOTA &&
            optind == argc - 1 && !show_default) {

                qctl.qc_cmd = LUSTRE_Q_GETQUOTA;
                qctl.qc_valid = valid;
                qctl.qc_idx = idx;

                for (qtype = USRQUOTA; qtype <= GRPQUOTA; qtype++) {
                        qctl.qc_type = qtype;
                        if (qtype == USRQUOTA) {
                                qctl.qc_id = geteuid();
                                rc = uid2name(&name, qctl.qc_id);
                        } else {
                                qctl.qc_id = getegid();
                                rc = gid2name(&name, qctl.qc_id);
                        }
                        if (rc)
                                name = "<unknown>";
                        mnt = argv[optind];
                        rc1 = get_print_quota(mnt, name, &qctl, verbose, quiet,
                                              human_readable, show_default);
                        if (rc1 && !rc)
                                rc = rc1;
                }
                return rc;
        /* lfs quota -u username /path/to/lustre/mount */
        } else if (qctl.qc_cmd == LUSTRE_Q_GETQUOTA) {
                /* options should be followed by u/g-name and mntpoint */
                if ((!show_default && optind + 2 != argc) ||
                    (show_default && optind + 1 != argc) ||
                    qctl.qc_type == ALLQUOTA) {
                        fprintf(stderr,
                                "%s quota: name and mount point must be specified\n",
                                progname);
                        return CMD_HELP;
                }

                if (!show_default) {
                        name = argv[optind++];
                        switch (qctl.qc_type) {
                        case USRQUOTA:
                                rc = name2uid(&qctl.qc_id, name);
                                break;
                        case GRPQUOTA:
                                rc = name2gid(&qctl.qc_id, name);
                                break;
                        case PRJQUOTA:
                                rc = name2projid(&qctl.qc_id, name);
                                break;
                        default:
                                rc = -ENOTSUP;
                                break;
                        }
                } else {
                        qctl.qc_valid = QC_GENERAL;
                        qctl.qc_cmd = LUSTRE_Q_GETDEFAULT;
                        qctl.qc_id = 0;
                }

                if (rc) {
                        qctl.qc_id = strtoul(name, &endptr, 10);
                        if (*endptr != '\0') {
                                fprintf(stderr, "%s quota: invalid id '%s'\n",
                                        progname, name);
                                return CMD_HELP;
                        }
                }
        } else if (optind + 1 != argc || qctl.qc_type == ALLQUOTA) {
                fprintf(stderr, "%s quota: missing quota info argument(s)\n",
                        progname);
                return CMD_HELP;
        }

        mnt = argv[optind];
        rc = get_print_quota(mnt, name, &qctl, verbose, quiet,
                             human_readable, show_default);
        return rc;
}
#endif /* HAVE_SYS_QUOTA_H! */

static int flushctx_ioctl(char *mp)
{
        int fd, rc;

        fd = open(mp, O_RDONLY);
        if (fd == -1) {
                fprintf(stderr, "flushctx: error open %s: %s\n",
                        mp, strerror(errno));
                return -1;
        }

        rc = ioctl(fd, LL_IOC_FLUSHCTX);
        if (rc == -1)
                fprintf(stderr, "flushctx: error ioctl %s: %s\n",
                        mp, strerror(errno));

        close(fd);
        return rc;
}

static int lfs_flushctx(int argc, char **argv)
{
        int     kdestroy = 0, c;
        char    mntdir[PATH_MAX] = {'\0'};
        int     index = 0;
        int     rc = 0;

        while ((c = getopt(argc, argv, "k")) != -1) {
                switch (c) {
                case 'k':
                        kdestroy = 1;
                        break;
                default:
                        fprintf(stderr, "error: %s: option '-%c' "
                                        "unrecognized\n", argv[0], c);
                        return CMD_HELP;
                }
        }

        if (kdestroy) {
            if ((rc = system("kdestroy > /dev/null")) != 0) {
                rc = WEXITSTATUS(rc);
                fprintf(stderr, "error destroying tickets: %d, continuing\n", rc);
            }
        }

        if (optind >= argc) {
                /* flush for all mounted lustre fs. */
                while (!llapi_search_mounts(NULL, index++, mntdir, NULL)) {
                        /* Check if we have a mount point */
                        if (mntdir[0] == '\0')
                                continue;

                        if (flushctx_ioctl(mntdir))
                                rc = -1;

                        mntdir[0] = '\0'; /* avoid matching in next loop */
                }
        } else {
                /* flush fs as specified */
                while (optind < argc) {
                        if (flushctx_ioctl(argv[optind++]))
                                rc = -1;
                }
        }
        return rc;
}

static int lfs_cp(int argc, char **argv)
{
        fprintf(stderr, "remote client copy file(s).\n"
                "obsolete, does not support it anymore.\n");
        return 0;
}

static int lfs_ls(int argc, char **argv)
{
        fprintf(stderr, "remote client lists directory contents.\n"
                "obsolete, does not support it anymore.\n");
        return 0;
}

static int lfs_changelog(int argc, char **argv)
{
        void *changelog_priv;
        struct changelog_rec *rec;
        long long startrec = 0, endrec = 0;
        char *mdd;
        struct option long_opts[] = {
                { .val = 'f', .name = "follow", .has_arg = no_argument },
                { .name = NULL } };
        char short_opts[] = "f";
        int rc, follow = 0;

        while ((rc = getopt_long(argc, argv, short_opts,
                long_opts, NULL)) != -1) {
                switch (rc) {
                case 'f':
                        follow++;
                        break;
                default:
                        fprintf(stderr,
                                "%s changelog: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }
        if (optind >= argc) {
                fprintf(stderr, "%s changelog: mdtname must be specified\n",
                        progname);
                return CMD_HELP;
        }

        mdd = argv[optind++];
        if (argc > optind)
                startrec = strtoll(argv[optind++], NULL, 10);
        if (argc > optind)
                endrec = strtoll(argv[optind++], NULL, 10);

        rc = llapi_changelog_start(&changelog_priv,
                                   CHANGELOG_FLAG_BLOCK |
                                   CHANGELOG_FLAG_JOBID |
                                   CHANGELOG_FLAG_EXTRA_FLAGS |
                                   (follow ? CHANGELOG_FLAG_FOLLOW : 0),
                                   mdd, startrec);
        if (rc < 0) {
                fprintf(stderr, "%s changelog: cannot start changelog: %s\n",
                        progname, strerror(errno = -rc));
                return rc;
        }

        rc = llapi_changelog_set_xflags(changelog_priv,
                                        CHANGELOG_EXTRA_FLAG_UIDGID |
                                        CHANGELOG_EXTRA_FLAG_NID |
                                        CHANGELOG_EXTRA_FLAG_OMODE |
                                        CHANGELOG_EXTRA_FLAG_XATTR);
        if (rc < 0) {
                fprintf(stderr,
                        "%s changelog: cannot set xflags for changelog: %s\n",
                        progname, strerror(errno = -rc));
                return rc;
        }

        while ((rc = llapi_changelog_recv(changelog_priv, &rec)) == 0) {
                time_t secs;
                struct tm ts;

                if (endrec && rec->cr_index > endrec) {
                        llapi_changelog_free(&rec);
                        break;
                }
                if (rec->cr_index < startrec) {
                        llapi_changelog_free(&rec);
                        continue;
                }

                secs = rec->cr_time >> 30;
                gmtime_r(&secs, &ts);
                printf("%ju %02d%-5s %02d:%02d:%02d.%09d %04d.%02d.%02d "
                       "0x%x t="DFID, (uintmax_t)rec->cr_index, rec->cr_type,
                       changelog_type2str(rec->cr_type),
                       ts.tm_hour, ts.tm_min, ts.tm_sec,
                       (int)(rec->cr_time & ((1 << 30) - 1)),
                       ts.tm_year + 1900, ts.tm_mon + 1, ts.tm_mday,
                       rec->cr_flags & CLF_FLAGMASK, PFID(&rec->cr_tfid));

                if (rec->cr_flags & CLF_JOBID) {
                        struct changelog_ext_jobid *jid =
                                changelog_rec_jobid(rec);

                        if (jid->cr_jobid[0] != '\0')
                                printf(" j=%s", jid->cr_jobid);
                }

                if (rec->cr_flags & CLF_EXTRA_FLAGS) {
                        struct changelog_ext_extra_flags *ef =
                                changelog_rec_extra_flags(rec);

                        printf(" ef=0x%llx", ef->cr_extra_flags);

                        if (ef->cr_extra_flags & CLFE_UIDGID) {
                                struct changelog_ext_uidgid *uidgid =
                                        changelog_rec_uidgid(rec);

                                printf(" u=%llu:%llu",
                                       uidgid->cr_uid, uidgid->cr_gid);
                        }
                        if (ef->cr_extra_flags & CLFE_NID) {
                                struct changelog_ext_nid *nid =
                                        changelog_rec_nid(rec);

                                printf(" nid=%s",
                                       libcfs_nid2str(nid->cr_nid));
                        }

                        if (ef->cr_extra_flags & CLFE_OPEN) {
                                struct changelog_ext_openmode *omd =
                                        changelog_rec_openmode(rec);
                                char mode[] = "---";

                                /* exec mode must be exclusive */
                                if (omd->cr_openflags & MDS_FMODE_EXEC) {
                                        mode[2] = 'x';
                                } else {
                                        if (omd->cr_openflags & MDS_FMODE_READ)
                                                mode[0] = 'r';
                                        if (omd->cr_openflags &
                                            (MDS_FMODE_WRITE |
                                             MDS_OPEN_TRUNC |
                                             MDS_OPEN_APPEND))
                                                mode[1] = 'w';
                                }

                                if (strcmp(mode, "---") != 0)
                                        printf(" m=%s", mode);

                        }

                        if (ef->cr_extra_flags & CLFE_XATTR) {
                                struct changelog_ext_xattr *xattr =
                                        changelog_rec_xattr(rec);

                                if (xattr->cr_xattr[0] != '\0')
                                        printf(" x=%s", xattr->cr_xattr);
                        }
                }

                if (rec->cr_namelen)
                        printf(" p="DFID" %.*s", PFID(&rec->cr_pfid),
                               rec->cr_namelen, changelog_rec_name(rec));

                if (rec->cr_flags & CLF_RENAME) {
                        struct changelog_ext_rename *rnm =
                                changelog_rec_rename(rec);

                        if (!fid_is_zero(&rnm->cr_sfid))
                                printf(" s="DFID" sp="DFID" %.*s",
                                       PFID(&rnm->cr_sfid),
                                       PFID(&rnm->cr_spfid),
                                       (int)changelog_rec_snamelen(rec),
                                       changelog_rec_sname(rec));
                }
                printf("\n");

                llapi_changelog_free(&rec);
        }

        llapi_changelog_fini(&changelog_priv);

        if (rc < 0)
                fprintf(stderr, "%s changelog: cannot access changelog: %s\n",
                        progname, strerror(errno = -rc));

        return (rc == 1 ? 0 : rc);
}

static int lfs_changelog_clear(int argc, char **argv)
{
        long long endrec;
        int rc;

        if (argc != 4)
                return CMD_HELP;

        endrec = strtoll(argv[3], NULL, 10);

        rc = llapi_changelog_clear(argv[1], argv[2], endrec);

        if (rc == -EINVAL)
                fprintf(stderr, "%s: record out of range: %llu\n",
                        argv[0], endrec);
        else if (rc == -ENOENT)
                fprintf(stderr, "%s: no changelog user: %s\n",
                        argv[0], argv[2]);
        else if (rc)
                fprintf(stderr, "%s error: %s\n", argv[0],
                        strerror(-rc));

        if (rc)
                errno = -rc;

        return rc;
}

static int lfs_fid2path(int argc, char **argv)
{
        struct option long_opts[] = {
                { .val = 'c',   .name = "cur",  .has_arg = no_argument },
                { .val = 'l',   .name = "link", .has_arg = required_argument },
                { .val = 'r',   .name = "rec",  .has_arg = required_argument },
                { .name = NULL } };
        char  short_opts[] = "cl:r:";
        char *device, *fid, *path;
        long long recno = -1;
        int linkno = -1;
        int lnktmp;
        int printcur = 0;
        int rc = 0;
        char *endptr = NULL;

        while ((rc = getopt_long(argc, argv, short_opts,
                long_opts, NULL)) != -1) {
                switch (rc) {
                case 'c':
                        printcur++;
                        break;
                case 'l':
                        linkno = strtol(optarg, &endptr, 10);
                        if (*endptr != '\0') {
                                fprintf(stderr,
                                        "%s fid2path: invalid linkno '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'r':
                        recno = strtoll(optarg, &endptr, 10);
                        if (*endptr != '\0') {
                                fprintf(stderr,
                                        "%s fid2path: invalid recno '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
                        }
                        break;
                default:
                        fprintf(stderr,
                                "%s fid2path: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (argc < 3) {
                fprintf(stderr,
                        "%s fid2path: <fsname|rootpath> and <fid>... must be specified\n",
                        progname);
                return CMD_HELP;
        }

        device = argv[optind++];
        path = calloc(1, PATH_MAX);
        if (path == NULL) {
                rc = -errno;
                fprintf(stderr,
                        "%s fid2path: cannot allocate memory for path: %s\n",
                        progname, strerror(-rc));
                return rc;
        }

        rc = 0;
        while (optind < argc) {
                fid = argv[optind++];

                lnktmp = (linkno >= 0) ? linkno : 0;
                while (1) {
                        int oldtmp = lnktmp;
                        long long rectmp = recno;
                        int rc2;
                        rc2 = llapi_fid2path(device, fid, path, PATH_MAX,
                                             &rectmp, &lnktmp);
                        if (rc2 < 0) {
                                fprintf(stderr,
                                        "%s fid2path: cannot find '%s': %s\n",
                                        progname, fid, strerror(errno = -rc2));
                                if (rc == 0)
                                        rc = rc2;
                                break;
                        }

                        if (printcur)
                                fprintf(stdout, "%lld ", rectmp);
                        if (device[0] == '/') {
                                fprintf(stdout, "%s", device);
                                if (device[strlen(device) - 1] != '/')
                                        fprintf(stdout, "/");
                        } else if (path[0] == '\0') {
                                fprintf(stdout, "/");
                        }
                        fprintf(stdout, "%s\n", path);

                        if (linkno >= 0)
                                /* specified linkno */
                                break;
                        if (oldtmp == lnktmp)
                                /* no more links */
                                break;
                }
        }

        free(path);
        return rc;
}

static int lfs_path2fid(int argc, char **argv)
{
        struct option long_opts[] = {
                { .val = 'p', .name = "parents", .has_arg = no_argument },
                { .name = NULL } };
        char            **path;
        const char        short_opts[] = "p";
        const char       *sep = "";
        struct lu_fid     fid;
        int               rc = 0;
        bool              show_parents = false;

        while ((rc = getopt_long(argc, argv, short_opts,
                                 long_opts, NULL)) != -1) {
                switch (rc) {
                case 'p':
                        show_parents = true;
                        break;
                default:
                        fprintf(stderr,
                                "%s path2fid: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (optind > argc - 1) {
                fprintf(stderr, "%s path2fid: FILE... must be specified\n",
                        progname);
                return CMD_HELP;
        }
        else if (optind < argc - 1)
                sep = ": ";

        rc = 0;
        for (path = argv + optind; *path != NULL; path++) {
                int err = 0;
                if (!show_parents) {
                        err = llapi_path2fid(*path, &fid);
                        if (!err)
                                printf("%s%s"DFID"\n",
                                       *sep != '\0' ? *path : "", sep,
                                       PFID(&fid));
                } else {
                        char            name[NAME_MAX + 1];
                        unsigned int    linkno = 0;

                        while ((err = llapi_path2parent(*path, linkno, &fid,
                                                name, sizeof(name))) == 0) {
                                if (*sep != '\0' && linkno == 0)
                                        printf("%s%s", *path, sep);

                                printf("%s"DFID"/%s", linkno != 0 ? "\t" : "",
                                       PFID(&fid), name);
                                linkno++;
                        }

                        /* err == -ENODATA is end-of-loop */
                        if (linkno > 0 && err == -ENODATA) {
                                printf("\n");
                                err = 0;
                        }
                }

                if (err) {
                        fprintf(stderr,
                                "%s path2fid: cannot get %sfid for '%s': %s\n",
                                progname, show_parents ? "parent " : "", *path,
                                strerror(-err));
                        if (rc == 0) {
                                rc = err;
                                errno = -err;
                        }
                }
        }

        return rc;
}

static int lfs_data_version(int argc, char **argv)
{
        char *path;
        __u64 data_version;
        int fd;
        int rc;
        int c;
        int data_version_flags = LL_DV_RD_FLUSH; /* Read by default */

        if (argc < 2) {
                fprintf(stderr, "%s data_version: FILE must be specified\n",
                        progname);
                return CMD_HELP;
        }

        while ((c = getopt(argc, argv, "nrw")) != -1) {
                switch (c) {
                case 'n':
                        data_version_flags = 0;
                        break;
                case 'r':
                        data_version_flags |= LL_DV_RD_FLUSH;
                        break;
                case 'w':
                        data_version_flags |= LL_DV_WR_FLUSH;
                        break;
                default:
                        fprintf(stderr,
                                "%s data_version: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
                        return CMD_HELP;
                }
        }
        if (optind == argc) {
                fprintf(stderr, "%s data_version: FILE must be specified\n",
                        progname);
                return CMD_HELP;
        }

        path = argv[optind];
        fd = open(path, O_RDONLY);
        if (fd < 0) {
                rc = -errno;
                fprintf(stderr, "%s data_version: cannot open file '%s': %s\n",
                        progname, path, strerror(-rc));
                return rc;
        }

        rc = llapi_get_data_version(fd, &data_version, data_version_flags);
        if (rc < 0)
                fprintf(stderr,
                        "%s data_version: cannot get version for '%s': %s\n",
                        progname, path, strerror(-rc));
        else
                printf("%ju" "\n", (uintmax_t)data_version);

        close(fd);
        return rc;
}

static int lfs_hsm_state(int argc, char **argv)
{
        int rc;
        int i = 1;
        char *path;
        struct hsm_user_state hus;

        if (argc < 2)
                return CMD_HELP;

        do {
                path = argv[i];

                rc = llapi_hsm_state_get(path, &hus);
                if (rc) {
                        fprintf(stderr, "can't get hsm state for %s: %s\n",
                                path, strerror(errno = -rc));
                        return rc;
                }

                /* Display path name and status flags */
                printf("%s: (0x%08x)", path, hus.hus_states);

                if (hus.hus_states & HS_RELEASED)
                        printf(" released");
                if (hus.hus_states & HS_EXISTS)
                        printf(" exists");
                if (hus.hus_states & HS_DIRTY)
                        printf(" dirty");
                if (hus.hus_states & HS_ARCHIVED)
                        printf(" archived");
                /* Display user-settable flags */
                if (hus.hus_states & HS_NORELEASE)
                        printf(" never_release");
                if (hus.hus_states & HS_NOARCHIVE)
                        printf(" never_archive");
                if (hus.hus_states & HS_LOST)
                        printf(" lost_from_hsm");

                if (hus.hus_archive_id != 0)
                        printf(", archive_id:%d", hus.hus_archive_id);
                printf("\n");

        } while (++i < argc);

        return 0;
}

#define LFS_HSM_SET   0
#define LFS_HSM_CLEAR 1

/**
 * Generic function to set or clear HSM flags.
 * Used by hsm_set and hsm_clear.
 *
 * @mode  if LFS_HSM_SET, set the flags, if LFS_HSM_CLEAR, clear the flags.
 */
static int lfs_hsm_change_flags(int argc, char **argv, int mode)
{
        struct option long_opts[] = {
        { .val = 'A',   .name = "archived",     .has_arg = no_argument },
        { .val = 'a',   .name = "noarchive",    .has_arg = no_argument },
        { .val = 'd',   .name = "dirty",        .has_arg = no_argument },
        { .val = 'e',   .name = "exists",       .has_arg = no_argument },
        { .val = 'l',   .name = "lost",         .has_arg = no_argument },
        { .val = 'r',   .name = "norelease",    .has_arg = no_argument },
        { .val = 'i',   .name = "archive-id",   .has_arg = required_argument },
        { .name = NULL } };
        char short_opts[] = "lraAdei:";
        __u64 mask = 0;
        int c, rc;
        char *path;
        __u32 archive_id = 0;
        char *end = NULL;

        if (argc < 3)
                return CMD_HELP;

        while ((c = getopt_long(argc, argv, short_opts,
                                long_opts, NULL)) != -1) {
                switch (c) {
                case 'l':
                        mask |= HS_LOST;
                        break;
                case 'a':
                        mask |= HS_NOARCHIVE;
                        break;
                case 'A':
                        mask |= HS_ARCHIVED;
                        break;
                case 'r':
                        mask |= HS_NORELEASE;
                        break;
                case 'd':
                        mask |= HS_DIRTY;
                        break;
                case 'e':
                        mask |= HS_EXISTS;
                        break;
                case 'i':
                        archive_id = strtol(optarg, &end, 10);
                        if (*end != '\0') {
                                fprintf(stderr, "invalid archive_id: '%s'\n",
                                        end);
                                return CMD_HELP;
                        }
                        break;
                case '?':
                        return CMD_HELP;
                default:
                        fprintf(stderr, "error: %s: option '%s' unrecognized\n",
                                argv[0], argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        /* User should have specified a flag */
        if (mask == 0)
                return CMD_HELP;

        while (optind < argc) {

                path = argv[optind];

                /* If mode == 0, this means we apply the mask. */
                if (mode == LFS_HSM_SET)
                        rc = llapi_hsm_state_set(path, mask, 0, archive_id);
                else
                        rc = llapi_hsm_state_set(path, 0, mask, 0);

                if (rc != 0) {
                        fprintf(stderr, "Can't change hsm flags for %s: %s\n",
                                path, strerror(errno = -rc));
                        return rc;
                }
                optind++;
        }

        return 0;
}

static int lfs_hsm_action(int argc, char **argv)
{
        int                              rc;
        int                              i = 1;
        char                            *path;
        struct hsm_current_action        hca;
        struct hsm_extent                he;
        enum hsm_user_action             hua;
        enum hsm_progress_states         hps;

        if (argc < 2)
                return CMD_HELP;

        do {
                path = argv[i];

                rc = llapi_hsm_current_action(path, &hca);
                if (rc) {
                        fprintf(stderr, "can't get hsm action for %s: %s\n",
                                path, strerror(errno = -rc));
                        return rc;
                }
                he = hca.hca_location;
                hua = hca.hca_action;
                hps = hca.hca_state;

                printf("%s: %s", path, hsm_user_action2name(hua));

                /* Skip file without action */
                if (hca.hca_action == HUA_NONE) {
                        printf("\n");
                        continue;
                }

                printf(" %s ", hsm_progress_state2name(hps));

                if ((hps == HPS_RUNNING) &&
                    (hua == HUA_ARCHIVE || hua == HUA_RESTORE))
                        printf("(%llu bytes moved)\n",
                               (unsigned long long)he.length);
                else if ((he.offset + he.length) == LUSTRE_EOF)
                        printf("(from %llu to EOF)\n",
                               (unsigned long long)he.offset);
                else
                        printf("(from %llu to %llu)\n",
                               (unsigned long long)he.offset,
                               (unsigned long long)(he.offset + he.length));

        } while (++i < argc);

        return 0;
}

static int lfs_hsm_set(int argc, char **argv)
{
        return lfs_hsm_change_flags(argc, argv, LFS_HSM_SET);
}

static int lfs_hsm_clear(int argc, char **argv)
{
        return lfs_hsm_change_flags(argc, argv, LFS_HSM_CLEAR);
}

/**
 * Check file state and return its fid, to be used by lfs_hsm_request().
 *
 * \param[in]     file      Path to file to check
 * \param[in,out] fid       Pointer to allocated lu_fid struct.
 * \param[in,out] last_dev  Pointer to last device id used.
 *
 * \return 0 on success.
 */
static int lfs_hsm_prepare_file(const char *file, struct lu_fid *fid,
                                dev_t *last_dev)
{
        struct stat     st;
        int             rc;

        rc = lstat(file, &st);
        if (rc) {
                fprintf(stderr, "Cannot stat %s: %s\n", file, strerror(errno));
                return -errno;
        }
        /* Checking for regular file as archiving as posix copytool
         * rejects archiving files other than regular files
         */
        if (!S_ISREG(st.st_mode)) {
                fprintf(stderr, "error: \"%s\" is not a regular file\n", file);
                return CMD_HELP;
        }
        /* A request should be ... */
        if (*last_dev != st.st_dev && *last_dev != 0) {
                fprintf(stderr, "All files should be "
                        "on the same filesystem: %s\n", file);
                return -EINVAL;
        }
        *last_dev = st.st_dev;

        rc = llapi_path2fid(file, fid);
        if (rc) {
                fprintf(stderr, "Cannot read FID of %s: %s\n",
                        file, strerror(-rc));
                return rc;
        }
        return 0;
}

/* Fill an HSM HUR item with a given file name.
 *
 * If mntpath is set, then the filename is actually a FID, and no
 * lookup on the filesystem will be performed.
 *
 * \param[in]  hur         the user request to fill
 * \param[in]  idx         index of the item inside the HUR to fill
 * \param[in]  mntpath     mountpoint of Lustre
 * \param[in]  fname       filename (if mtnpath is NULL)
 *                         or FID (if mntpath is set)
 * \param[in]  last_dev    pointer to last device id used
 *
 * \retval 0 on success
 * \retval CMD_HELP or a negative errno on error
 */
static int fill_hur_item(struct hsm_user_request *hur, unsigned int idx,
                         const char *mntpath, const char *fname,
                         dev_t *last_dev)
{
        struct hsm_user_item *hui = &hur->hur_user_item[idx];
        int rc;

        hui->hui_extent.length = -1;

        if (mntpath != NULL) {
                if (*fname == '[')
                        fname++;
                rc = sscanf(fname, SFID, RFID(&hui->hui_fid));
                if (rc == 3) {
                        rc = 0;
                } else {
                        fprintf(stderr, "hsm: '%s' is not a valid FID\n",
                                fname);
                        rc = -EINVAL;
                }
        } else {
                rc = lfs_hsm_prepare_file(fname, &hui->hui_fid, last_dev);
        }

        if (rc == 0)
                hur->hur_request.hr_itemcount++;

        return rc;
}

static int lfs_hsm_request(int argc, char **argv, int action)
{
        struct option long_opts[] = {
        { .val = 'a',   .name = "archive",      .has_arg = required_argument },
        { .val = 'D',   .name = "data",         .has_arg = required_argument },
        { .val = 'l',   .name = "filelist",     .has_arg = required_argument },
        { .val = 'm',   .name = "mntpath",      .has_arg = required_argument },
        { .name = NULL } };
        dev_t                    last_dev = 0;
        char                     short_opts[] = "l:D:a:m:";
        struct hsm_user_request *hur, *oldhur;
        int                      c, i;
        size_t                   len;
        int                      nbfile;
        char                    *line = NULL;
        char                    *filelist = NULL;
        char                     fullpath[PATH_MAX];
        char                    *opaque = NULL;
        int                      opaque_len = 0;
        int                      archive_id = 0;
        FILE                    *fp;
        int                      nbfile_alloc = 0;
        char                    *some_file = NULL;
        char                    *mntpath = NULL;
        int                      rc;

        if (argc < 2)
                return CMD_HELP;

        while ((c = getopt_long(argc, argv, short_opts,
                                long_opts, NULL)) != -1) {
                switch (c) {
                case 'l':
                        filelist = optarg;
                        break;
                case 'D':
                        opaque = optarg;
                        break;
                case 'a':
                        if (action != HUA_ARCHIVE &&
                            action != HUA_REMOVE) {
                                fprintf(stderr,
                                        "error: -a is supported only "
                                        "when archiving or removing\n");
                                return CMD_HELP;
                        }
                        archive_id = atoi(optarg);
                        break;
                case 'm':
                        if (some_file == NULL) {
                                mntpath = optarg;
                                some_file = strdup(optarg);
                        }
                        break;
                case '?':
                        return CMD_HELP;
                default:
                        fprintf(stderr, "error: %s: option '%s' unrecognized\n",
                                argv[0], argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        /* All remaining args are files, so we have at least nbfile */
        nbfile = argc - optind;

        if ((nbfile == 0) && (filelist == NULL))
                return CMD_HELP;

        if (opaque != NULL)
                opaque_len = strlen(opaque);

        /* Alloc the request structure with enough place to store all files
         * from command line. */
        hur = llapi_hsm_user_request_alloc(nbfile, opaque_len);
        if (hur == NULL) {
                fprintf(stderr, "Cannot create the request: %s\n",
                        strerror(errno));
                return errno;
        }
        nbfile_alloc = nbfile;

        hur->hur_request.hr_action = action;
        hur->hur_request.hr_archive_id = archive_id;
        hur->hur_request.hr_flags = 0;

        /* All remaining args are files, add them */
        if (nbfile != 0 && some_file == NULL)
                some_file = strdup(argv[optind]);

        for (i = 0; i < nbfile; i++) {
                rc = fill_hur_item(hur, i, mntpath, argv[optind + i],
                                   &last_dev);
                if (rc)
                        goto out_free;
        }

        /* from here stop using nb_file, use hur->hur_request.hr_itemcount */

        /* If a filelist was specified, read the filelist from it. */
        if (filelist != NULL) {
                fp = fopen(filelist, "r");
                if (fp == NULL) {
                        fprintf(stderr, "Cannot read the file list %s: %s\n",
                                filelist, strerror(errno));
                        rc = -errno;
                        goto out_free;
                }

                while ((rc = getline(&line, &len, fp)) != -1) {
                        /* If allocated buffer was too small, get something
                         * larger */
                        if (nbfile_alloc <= hur->hur_request.hr_itemcount) {
                                ssize_t size;

                                nbfile_alloc = nbfile_alloc * 2 + 1;
                                oldhur = hur;
                                hur = llapi_hsm_user_request_alloc(nbfile_alloc,
                                                                   opaque_len);
                                if (hur == NULL) {
                                        fprintf(stderr, "hsm: cannot allocate "
                                                "the request: %s\n",
                                                strerror(errno));
                                        hur = oldhur;
                                        rc = -errno;
                                        fclose(fp);
                                        goto out_free;
                                }
                                size = hur_len(oldhur);
                                if (size < 0) {
                                        fprintf(stderr, "hsm: cannot allocate "
                                                "%u files + %u bytes data\n",
                                            oldhur->hur_request.hr_itemcount,
                                            oldhur->hur_request.hr_data_len);
                                        free(hur);
                                        hur = oldhur;
                                        rc = -E2BIG;
                                        fclose(fp);
                                        goto out_free;
                                }
                                memcpy(hur, oldhur, size);
                                free(oldhur);
                        }

                        /* Chop CR */
                        if (line[strlen(line) - 1] == '\n')
                                line[strlen(line) - 1] = '\0';

                        rc = fill_hur_item(hur, hur->hur_request.hr_itemcount,
                                           mntpath, line, &last_dev);
                        if (rc) {
                                fclose(fp);
                                goto out_free;
                        }

                        if (some_file == NULL) {
                                some_file = line;
                                line = NULL;
                        }
                }

                rc = fclose(fp);
                free(line);
        }

        /* If a --data was used, add it to the request */
        hur->hur_request.hr_data_len = opaque_len;
        if (opaque != NULL)
                memcpy(hur_data(hur), opaque, opaque_len);

        /* Send the HSM request */
        if (realpath(some_file, fullpath) == NULL) {
                fprintf(stderr, "Could not find path '%s': %s\n",
                        some_file, strerror(errno));
        }
        rc = llapi_hsm_request(fullpath, hur);
        if (rc) {
                fprintf(stderr, "Cannot send HSM request (use of %s): %s\n",
                        some_file, strerror(-rc));
                goto out_free;
        }

out_free:
        free(some_file);
        free(hur);
        return rc;
}

static int lfs_hsm_archive(int argc, char **argv)
{
        return lfs_hsm_request(argc, argv, HUA_ARCHIVE);
}

static int lfs_hsm_restore(int argc, char **argv)
{
        return lfs_hsm_request(argc, argv, HUA_RESTORE);
}

static int lfs_hsm_release(int argc, char **argv)
{
        return lfs_hsm_request(argc, argv, HUA_RELEASE);
}

static int lfs_hsm_remove(int argc, char **argv)
{
        return lfs_hsm_request(argc, argv, HUA_REMOVE);
}

static int lfs_hsm_cancel(int argc, char **argv)
{
        return lfs_hsm_request(argc, argv, HUA_CANCEL);
}

static int lfs_swap_layouts(int argc, char **argv)
{
        if (argc != 3)
                return CMD_HELP;

        return llapi_swap_layouts(argv[1], argv[2], 0, 0,
                                  SWAP_LAYOUTS_KEEP_MTIME |
                                  SWAP_LAYOUTS_KEEP_ATIME);
}

static const char *const ladvise_names[] = LU_LADVISE_NAMES;

static const char *const lock_mode_names[] = LOCK_MODE_NAMES;

int lfs_get_mode(const char *string)
{
        enum lock_mode_user mode;

        for (mode = 0; mode < ARRAY_SIZE(lock_mode_names); mode++) {
                if (lock_mode_names[mode] == NULL)
                        continue;
                if (strcmp(string, lock_mode_names[mode]) == 0)
                        return mode;
        }

        return -EINVAL;
}

static enum lu_ladvise_type lfs_get_ladvice(const char *string)
{
        enum lu_ladvise_type advice;

        for (advice = 0;
             advice < ARRAY_SIZE(ladvise_names); advice++) {
                if (ladvise_names[advice] == NULL)
                        continue;
                if (strcmp(string, ladvise_names[advice]) == 0)
                        return advice;
        }

        return LU_LADVISE_INVALID;
}

static int lfs_ladvise(int argc, char **argv)
{
        struct option long_opts[] = {
        { .val = 'a',   .name = "advice",       .has_arg = required_argument },
        { .val = 'b',   .name = "background",   .has_arg = no_argument },
        { .val = 'e',   .name = "end",          .has_arg = required_argument },
        { .val = 'l',   .name = "length",       .has_arg = required_argument },
        { .val = 'm',   .name = "mode",         .has_arg = required_argument },
        { .val = 's',   .name = "start",        .has_arg = required_argument },
        { .val = 'u',   .name = "unset",        .has_arg = no_argument },
        { .name = NULL } };
        char                     short_opts[] = "a:be:l:m:s:u";
        int                      c;
        int                      rc = 0;
        const char              *path;
        int                      fd;
        struct llapi_lu_ladvise  advice;
        enum lu_ladvise_type     advice_type = LU_LADVISE_INVALID;
        unsigned long long       start = 0;
        unsigned long long       end = LUSTRE_EOF;
        unsigned long long       length = 0;
        unsigned long long       size_units;
        unsigned long long       flags = 0;
        int                      mode = 0;

        optind = 0;
        while ((c = getopt_long(argc, argv, short_opts,
                                long_opts, NULL)) != -1) {
                switch (c) {
                case 'a':
                        advice_type = lfs_get_ladvice(optarg);
                        if (advice_type == LU_LADVISE_INVALID) {
                                fprintf(stderr, "%s: invalid advice type "
                                        "'%s'\n", argv[0], optarg);
                                fprintf(stderr, "Valid types:");

                                for (advice_type = 0;
                                     advice_type < ARRAY_SIZE(ladvise_names);
                                     advice_type++) {
                                        if (ladvise_names[advice_type] == NULL)
                                                continue;
                                        fprintf(stderr, " %s",
                                                ladvise_names[advice_type]);
                                }
                                fprintf(stderr, "\n");

                                return CMD_HELP;
                        }
                        break;
                case 'b':
                        flags |= LF_ASYNC;
                        break;
                case 'u':
                        flags |= LF_UNSET;
                        break;
                case 'e':
                        size_units = 1;
                        rc = llapi_parse_size(optarg, &end,
                                              &size_units, 0);
                        if (rc) {
                                fprintf(stderr, "%s: bad end offset '%s'\n",
                                        argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 's':
                        size_units = 1;
                        rc = llapi_parse_size(optarg, &start,
                                              &size_units, 0);
                        if (rc) {
                                fprintf(stderr, "%s: bad start offset "
                                        "'%s'\n", argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'l':
                        size_units = 1;
                        rc = llapi_parse_size(optarg, &length,
                                              &size_units, 0);
                        if (rc) {
                                fprintf(stderr, "%s: bad length '%s'\n",
                                        argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case 'm':
                        mode = lfs_get_mode(optarg);
                        if (mode < 0) {
                                fprintf(stderr, "%s: bad mode '%s', valid "
                                                 "modes are READ or WRITE\n",
                                        argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
                case '?':
                        return CMD_HELP;
                default:
                        fprintf(stderr, "%s: option '%s' unrecognized\n",
                                argv[0], argv[optind - 1]);
                        return CMD_HELP;
                }
        }

        if (advice_type == LU_LADVISE_INVALID) {
                fprintf(stderr, "%s: please give an advice type\n", argv[0]);
                fprintf(stderr, "Valid types:");
                for (advice_type = 0; advice_type < ARRAY_SIZE(ladvise_names);
                     advice_type++) {
                        if (ladvise_names[advice_type] == NULL)
                                continue;
                        fprintf(stderr, " %s", ladvise_names[advice_type]);
                }
                fprintf(stderr, "\n");
                return CMD_HELP;
        }

        if (advice_type == LU_LADVISE_LOCKNOEXPAND) {
                fprintf(stderr, "%s: Lock no expand advice is a per file "
                                 "descriptor advice, so when called from lfs, "
                                 "it does nothing.\n", argv[0]);
                return CMD_HELP;
        }

        if (argc <= optind) {
                fprintf(stderr, "%s: please give one or more file names\n",
                        argv[0]);
                return CMD_HELP;
        }

        if (end != LUSTRE_EOF && length != 0 && end != start + length) {
                fprintf(stderr, "%s: conflicting arguments of -l and -e\n",
                        argv[0]);
                return CMD_HELP;
        }

        if (end == LUSTRE_EOF && length != 0)
                end = start + length;

        if (end <= start) {
                fprintf(stderr, "%s: range [%llu, %llu] is invalid\n",
                        argv[0], start, end);
                return CMD_HELP;
        }

        if (advice_type != LU_LADVISE_LOCKAHEAD && mode != 0) {
                fprintf(stderr, "%s: mode is only valid with lockahead\n",
                        argv[0]);
                return CMD_HELP;
        }

        if (advice_type == LU_LADVISE_LOCKAHEAD && mode == 0) {
                fprintf(stderr, "%s: mode is required with lockahead\n",
                        argv[0]);
                return CMD_HELP;
        }

        while (optind < argc) {
                int rc2;

                path = argv[optind++];

                fd = open(path, O_RDONLY);
                if (fd < 0) {
                        fprintf(stderr, "%s: cannot open file '%s': %s\n",
                                argv[0], path, strerror(errno));
                        rc2 = -errno;
                        goto next;
                }

                advice.lla_start = start;
                advice.lla_end = end;
                advice.lla_advice = advice_type;
                advice.lla_value1 = 0;
                advice.lla_value2 = 0;
                advice.lla_value3 = 0;
                advice.lla_value4 = 0;
                if (advice_type == LU_LADVISE_LOCKAHEAD) {
                        advice.lla_lockahead_mode = mode;
                        advice.lla_peradvice_flags = flags;
                }

                rc2 = llapi_ladvise(fd, flags, 1, &advice);
                close(fd);
                if (rc2 < 0) {
                        fprintf(stderr, "%s: cannot give advice '%s' to file "
                                "'%s': %s\n", argv[0],
                                ladvise_names[advice_type],
                                path, strerror(errno));

                        goto next;
                }

next:
                if (rc == 0 && rc2 < 0)
                        rc = rc2;
        }
        return rc;
}

/** The input string contains a comma delimited list of component ids and
 * ranges, for example "1,2-4,7".
 */
static int parse_mirror_ids(__u16 *ids, int size, char *arg)
{
        bool end_of_loop = false;
        char *ptr = NULL;
        int nr = 0;
        int rc;

        if (arg == NULL)
                return -EINVAL;

        while (!end_of_loop) {
                int start_index;
                int end_index;
                int i;
                char *endptr = NULL;

                rc = -EINVAL;
                ptr = strchrnul(arg, ',');
                end_of_loop = *ptr == '\0';
                *ptr = '\0';

                start_index = strtol(arg, &endptr, 0);
                if (endptr == arg) /* no data at all */
                        break;
                if (*endptr != '-' && *endptr != '\0') /* has invalid data */
                        break;
                if (start_index < 0)
                        break;

                end_index = start_index;
                if (*endptr == '-') {
                        end_index = strtol(endptr + 1, &endptr, 0);
                        if (*endptr != '\0')
                                break;
                        if (end_index < start_index)
                                break;
                }

                for (i = start_index; i <= end_index && size > 0; i++) {
                        int j;

                        /* remove duplicate */
                        for (j = 0; j < nr; j++) {
                                if (ids[j] == i)
                                        break;
                        }
                        if (j == nr) { /* no duplicate */
                                ids[nr++] = i;
                                --size;
                        }
                }

                if (size == 0 && i < end_index)
                        break;

                *ptr = ',';
                arg = ++ptr;
                rc = 0;
        }
        if (!end_of_loop && ptr != NULL)
                *ptr = ',';

        return rc < 0 ? rc : nr;
}

/**
 * struct verify_mirror_id - Mirror id to be verified.
 * @mirror_id:   A specified mirror id.
 * @is_valid_id: @mirror_id is valid or not in the mirrored file.
 */
struct verify_mirror_id {
        __u16 mirror_id;
        bool is_valid_id;
};

/**
 * compare_mirror_ids() - Compare mirror ids.
 * @layout: Mirror component list.
 * @cbdata: Callback data in verify_mirror_id structure.
 *
 * This is a callback function called by llapi_layout_comp_iterate()
 * to compare the specified mirror id with the one in the current
 * component of @layout. If they are the same, then the specified
 * mirror id is valid.
 *
 * Return: a negative error code on failure or
 *         LLAPI_LAYOUT_ITER_CONT: Proceed iteration
 *         LLAPI_LAYOUT_ITER_STOP: Stop iteration
 */
static inline
int compare_mirror_ids(struct llapi_layout *layout, void *cbdata)
{
        struct verify_mirror_id *mirror_id_cbdata =
                                 (struct verify_mirror_id *)cbdata;
        uint32_t mirror_id;
        int rc = 0;

        rc = llapi_layout_mirror_id_get(layout, &mirror_id);
        if (rc < 0) {
                rc = -errno;
                fprintf(stderr,
                        "%s: llapi_layout_mirror_id_get failed: %s.\n",
                        progname, strerror(errno));
                return rc;
        }

        if (mirror_id_cbdata->mirror_id == mirror_id) {
                mirror_id_cbdata->is_valid_id = true;
                return LLAPI_LAYOUT_ITER_STOP;
        }

        return LLAPI_LAYOUT_ITER_CONT;
}

/**
 * verify_mirror_ids() - Verify specified mirror ids.
 * @fname:      Mirrored file name.
 * @mirror_ids: Specified mirror ids to be verified.
 * @ids_nr:     Number of specified mirror ids.
 *
 * This function verifies that specified @mirror_ids are valid
 * in the mirrored file @fname.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static inline
int verify_mirror_ids(const char *fname, __u16 *mirror_ids, int ids_nr)
{
        struct llapi_layout *layout = NULL;
        struct verify_mirror_id mirror_id_cbdata = { 0 };
        struct stat stbuf;
        uint32_t flr_state;
        int i;
        int fd;
        int rc = 0;
        int rc2 = 0;

        if (ids_nr <= 0)
                return -EINVAL;

        if (stat(fname, &stbuf) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }

        if (!S_ISREG(stbuf.st_mode)) {
                fprintf(stderr, "%s: '%s' is not a regular file.\n",
                        progname, fname);
                rc = -EINVAL;
                goto error;
        }

        fd = open(fname, O_DIRECT | O_RDONLY);
        if (fd < 0) {
                fprintf(stderr, "%s: cannot open '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }

        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
                fprintf(stderr, "%s: '%s' llapi_lease_acquire failed: %s.\n",
                        progname, fname, strerror(errno));
                goto close_fd;
        }

        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                llapi_lease_release(fd);
                goto close_fd;
        }

        rc = llapi_layout_flags_get(layout, &flr_state);
        if (rc < 0) {
                fprintf(stderr, "%s: '%s' llapi_layout_flags_get failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto free_layout;
        }

        flr_state &= LCM_FL_FLR_MASK;
        switch (flr_state) {
        case LCM_FL_NONE:
                rc = -EINVAL;
                fprintf(stderr, "%s: '%s' file state error: %s.\n",
                        progname, fname, llapi_layout_flags_string(flr_state));
                goto free_layout;
        default:
                break;
        }

        rc2 = 0;
        for (i = 0; i < ids_nr; i++) {
                mirror_id_cbdata.mirror_id = mirror_ids[i];
                mirror_id_cbdata.is_valid_id = false;

                rc = llapi_layout_comp_iterate(layout, compare_mirror_ids,
                                               &mirror_id_cbdata);
                if (rc < 0) {
                        rc = -errno;
                        fprintf(stderr,
                                "%s: '%s' failed to verify mirror id: %u.\n",
                                progname, fname, mirror_ids[i]);
                        goto free_layout;
                }

                if (!mirror_id_cbdata.is_valid_id) {
                        rc2 = -EINVAL;
                        fprintf(stderr,
                                "%s: '%s' invalid specified mirror id: %u.\n",
                                progname, fname, mirror_ids[i]);
                }
        }
        rc = rc2;

free_layout:
        llapi_layout_free(layout);
        llapi_lease_release(fd);
close_fd:
        close(fd);
error:
        return rc;
}

static inline
int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
                           __u16 *mirror_ids, int ids_nr)
{
        struct llapi_resync_comp comp_array[1024] = { { 0 } };
        struct llapi_layout *layout;
        struct stat stbuf;
        uint32_t flr_state;
        uint64_t start;
        uint64_t end;
        int comp_size = 0;
        int idx;
        int fd;
        int rc;

        if (stat(fname, &stbuf) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }
        if (!S_ISREG(stbuf.st_mode)) {
                fprintf(stderr, "%s: '%s' is not a regular file.\n",
                        progname, fname);
                rc = -EINVAL;
                goto error;
        }

        fd = open(fname, O_DIRECT | O_RDWR);
        if (fd < 0) {
                fprintf(stderr, "%s: cannot open '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }

        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto close_fd;
        }

        rc = llapi_layout_flags_get(layout, &flr_state);
        if (rc) {
                fprintf(stderr, "%s: '%s' llapi_layout_flags_get failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto free_layout;
        }

        flr_state &= LCM_FL_FLR_MASK;
        if (flr_state == LCM_FL_NONE) {
                rc = -EINVAL;
                fprintf(stderr, "%s: '%s' is not a FLR file.\n",
                        progname, fname);
                goto free_layout;
        }

        /* get stale component info */
        comp_size = llapi_mirror_find_stale(layout, comp_array,
                                            ARRAY_SIZE(comp_array),
                                            mirror_ids, ids_nr);
        if (comp_size <= 0) {
                rc = comp_size;
                goto free_layout;
        }

        ioc->lil_mode = LL_LEASE_WRLCK;
        ioc->lil_flags = LL_LEASE_RESYNC;
        rc = llapi_lease_set(fd, ioc);
        if (rc < 0) {
                if (rc == -EALREADY)
                        rc = 0;
                else
                        fprintf(stderr,
                            "%s: '%s' llapi_lease_get_ext resync failed: %s.\n",
                                progname, fname, strerror(errno));
                goto free_layout;
        }

        /* get the read range [start, end) */
        start = comp_array[0].lrc_start;
        end = comp_array[0].lrc_end;
        for (idx = 1; idx < comp_size; idx++) {
                if (comp_array[idx].lrc_start < start)
                        start = comp_array[idx].lrc_start;
                if (end < comp_array[idx].lrc_end)
                        end = comp_array[idx].lrc_end;
        }

        rc = llapi_lease_check(fd);
        if (rc != LL_LEASE_WRLCK) {
                fprintf(stderr, "%s: '%s' lost lease lock.\n",
                        progname, fname);
                goto free_layout;
        }

        rc = llapi_mirror_resync_many(fd, layout, comp_array, comp_size,
                                      start, end);
        if (rc < 0)
                fprintf(stderr, "%s: '%s' llapi_mirror_resync_many: %d.\n",
                        progname, fname, rc);

        /* prepare ioc for lease put */
        ioc->lil_mode = LL_LEASE_UNLCK;
        ioc->lil_flags = LL_LEASE_RESYNC_DONE;
        ioc->lil_count = 0;
        for (idx = 0; idx < comp_size; idx++) {
                if (comp_array[idx].lrc_synced) {
                        ioc->lil_ids[ioc->lil_count] = comp_array[idx].lrc_id;
                        ioc->lil_count++;
                }
        }

        rc = llapi_lease_set(fd, ioc);
        if (rc <= 0) {
                if (rc == 0) /* lost lease lock */
                        rc = -EBUSY;
                fprintf(stderr, "%s: resync file '%s' failed: %s.\n",
                        progname, fname, strerror(errno));
                goto free_layout;
        }
        /**
         * llapi_lease_set returns lease mode when it request to unlock
         * the lease lock
         */
        rc = 0;

free_layout:
        llapi_layout_free(layout);
close_fd:
        close(fd);
error:
        return rc;
}

static inline int lfs_mirror_resync(int argc, char **argv)
{
        struct ll_ioc_lease *ioc = NULL;
        __u16 mirror_ids[128] = { 0 };
        int ids_nr = 0;
        int c;
        int rc = 0;

        struct option long_opts[] = {
        { .val = 'o',   .name = "only",         .has_arg = required_argument },
        { .name = NULL } };

        while ((c = getopt_long(argc, argv, "o:", long_opts, NULL)) >= 0) {
                switch (c) {
                case 'o':
                        rc = parse_mirror_ids(mirror_ids,
                                        sizeof(mirror_ids) / sizeof(__u16),
                                        optarg);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: bad mirror ids '%s'.\n",
                                        argv[0], optarg);
                                goto error;
                        }
                        ids_nr = rc;
                        break;
                default:
                        fprintf(stderr, "%s: options '%s' unrecognized.\n",
                                argv[0], argv[optind - 1]);
                        rc = -EINVAL;
                        goto error;
                }
        }

        if (argc == optind) {
                fprintf(stderr, "%s: no file name given.\n", argv[0]);
                rc = CMD_HELP;
                goto error;
        }

        if (ids_nr > 0 && argc > optind + 1) {
                fprintf(stderr,
                    "%s: option '--only' cannot be used upon multiple files.\n",
                        argv[0]);
                rc = CMD_HELP;
                goto error;

        }

        if (ids_nr > 0) {
                rc = verify_mirror_ids(argv[optind], mirror_ids, ids_nr);
                if (rc < 0)
                        goto error;
        }

        /* set the lease on the file */
        ioc = calloc(sizeof(*ioc) + sizeof(__u32) * 4096, 1);
        if (ioc == NULL) {
                fprintf(stderr, "%s: cannot alloc id array for ioc: %s.\n",
                        argv[0], strerror(errno));
                rc = -errno;
                goto error;
        }

        for (; optind < argc; optind++) {
                rc = lfs_mirror_resync_file(argv[optind], ioc,
                                            mirror_ids, ids_nr);
                /* ignore previous file's error, continue with next file */

                /* reset ioc */
                memset(ioc, 0, sizeof(*ioc) + sizeof(__u32) * 4096);
        }

        free(ioc);
error:
        return rc;
}

static inline int verify_mirror_id_by_fd(int fd, __u16 mirror_id)
{
        struct llapi_layout *layout;
        int rc;

        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "could not get layout.\n");
                return  -EINVAL;
        }

        rc = llapi_layout_comp_iterate(layout, find_mirror_id, &mirror_id);
        if (rc < 0) {
                fprintf(stderr, "failed to iterate layout\n");
                llapi_layout_free(layout);

                return rc;
        } else if (rc == LLAPI_LAYOUT_ITER_CONT) {
                fprintf(stderr, "does not find mirror with ID %u\n", mirror_id);
                llapi_layout_free(layout);

                return -EINVAL;
        }
        llapi_layout_free(layout);

        return 0;
}

/**
 * Check whether two files are the same file
 * \retval      0  same file
 * \retval      1  not the same file
 * \retval      <0 error code
 */
static inline int check_same_file(const char *f1, const char *f2)
{
        struct stat stbuf1;
        struct stat stbuf2;

        if (stat(f1, &stbuf1) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s\n",
                        progname, f1, strerror(errno));
                return -errno;
        }

        if (stat(f2, &stbuf2) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s\n",
                        progname, f2, strerror(errno));
                return -errno;
        }

        if (stbuf1.st_rdev == stbuf2.st_rdev &&
            stbuf1.st_ino == stbuf2.st_ino)
                return 0;

        return 1;
}

static inline int lfs_mirror_read(int argc, char **argv)
{
        int rc = CMD_HELP;
        __u16 mirror_id = 0;
        const char *outfile = NULL;
        char *fname;
        int fd = 0;
        int outfd;
        int c;
        void *buf;
        const size_t buflen = 4 << 20;
        off_t pos;
        struct option long_opts[] = {
        { .val = 'N',   .name = "mirror-id",    .has_arg = required_argument },
        { .val = 'o',   .name = "outfile",      .has_arg = required_argument },
        { .name = NULL } };

        while ((c = getopt_long(argc, argv, "N:o:", long_opts, NULL)) >= 0) {
                char *end;

                switch (c) {
                case 'N':
                        mirror_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || mirror_id == 0) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return rc;
                        }
                        break;
                case 'o':
                        outfile = optarg;
                        break;
                default:
                        fprintf(stderr, "%s: option '%s' unrecognized.\n",
                                progname, argv[optind - 1]);
                        return -EINVAL;
                }
        }

        if (argc == optind) {
                fprintf(stderr, "%s %s: no mirrored file provided\n",
                        progname, argv[0]);
                return rc;
        } else if (argc > optind + 1) {
                fprintf(stderr, "%s %s: too many files\n", progname, argv[0]);
                return rc;
        }

        if (mirror_id == 0) {
                fprintf(stderr, "%s %s: no valid mirror ID is provided\n",
                        progname, argv[0]);
                return rc;
        }

        /* open mirror file */
        fname = argv[optind];

        if (outfile) {
                rc = check_same_file(fname, outfile);
                if (rc == 0) {
                        fprintf(stderr,
                        "%s %s: output file cannot be the mirrored file\n",
                                progname, argv[0]);
                        return -EINVAL;
                }
                if (rc < 0)
                        return rc;
        }

        fd = open(fname, O_DIRECT | O_RDONLY);
        if (fd < 0) {
                fprintf(stderr, "%s %s: cannot open '%s': %s\n",
                        progname, argv[0], fname, strerror(errno));
                return rc;
        }

        /* verify mirror id */
        rc = verify_mirror_id_by_fd(fd, mirror_id);
        if (rc) {
                fprintf(stderr,
                        "%s %s: cannot find mirror with ID %u in '%s'\n",
                        progname, argv[0], mirror_id, fname);
                goto close_fd;
        }

        /* open output file */
        if (outfile) {
                outfd = open(outfile, O_EXCL | O_WRONLY | O_CREAT, 0644);
                if (outfd < 0) {
                        fprintf(stderr, "%s %s: cannot create file '%s': %s\n",
                                progname, argv[0], outfile, strerror(errno));
                        rc = -errno;
                        goto close_fd;
                }
        } else {
                outfd = STDOUT_FILENO;
        }

        /* allocate buffer */
        rc = posix_memalign(&buf, sysconf(_SC_PAGESIZE), buflen);
        if (rc) {
                fprintf(stderr, "%s %s: posix_memalign returns %d\n",
                                progname, argv[0], rc);
                goto close_outfd;
        }

        pos = 0;
        while (1) {
                ssize_t bytes_read;
                ssize_t written = 0;

                bytes_read = llapi_mirror_read(fd, mirror_id, buf, buflen, pos);
                if (bytes_read < 0) {
                        rc = bytes_read;
                        fprintf(stderr,
                                "%s %s: fail to read data from mirror %u: %s\n",
                                progname, argv[0], mirror_id, strerror(-rc));
                        goto free_buf;
                }

                /* EOF reached */
                if (bytes_read == 0)
                        break;

                while (written < bytes_read) {
                        ssize_t written2;

                        written2 = write(outfd, buf + written,
                                         bytes_read - written);
                        if (written2 < 0) {
                                fprintf(stderr,
                                        "%s %s: fail to write %s: %s\n",
                                        progname, argv[0], outfile ? : "STDOUT",
                                        strerror(errno));
                                rc = -errno;
                                goto free_buf;
                        }
                        written += written2;
                }

                if (written != bytes_read) {
                        fprintf(stderr,
                "%s %s: written %ld bytes does not match with %ld read.\n",
                                progname, argv[0], written, bytes_read);
                        rc = -EIO;
                        goto free_buf;
                }

                pos += bytes_read;
        }

        fsync(outfd);
        rc = 0;

free_buf:
        free(buf);
close_outfd:
        if (outfile)
                close(outfd);
close_fd:
        close(fd);

        return rc;
}

static inline int lfs_mirror_write(int argc, char **argv)
{
        int rc = CMD_HELP;
        __u16 mirror_id = 0;
        const char *inputfile = NULL;
        char *fname;
        int fd = 0;
        int inputfd;
        int c;
        void *buf;
        const size_t buflen = 4 << 20;
        off_t pos;
        size_t page_size = sysconf(_SC_PAGESIZE);
        struct ll_ioc_lease_id ioc;

        struct option long_opts[] = {
        { .val = 'N',   .name = "mirror-id",    .has_arg = required_argument },
        { .val = 'i',   .name = "inputfile",    .has_arg = required_argument },
        { .name = NULL } };

        while ((c = getopt_long(argc, argv, "N:i:", long_opts, NULL)) >= 0) {
                char *end;

                switch (c) {
                case 'N':
                        mirror_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || mirror_id == 0) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return rc;
                        }
                        break;
                case 'i':
                        inputfile = optarg;
                        break;
                default:
                        fprintf(stderr, "%s: option '%s' unrecognized\n",
                                progname, argv[optind - 1]);
                        return -EINVAL;
                }
        }

        if (argc == optind) {
                fprintf(stderr, "%s %s: no mirrored file provided\n",
                        progname, argv[0]);
                return rc;
        } else if (argc > optind + 1) {
                fprintf(stderr, "%s %s: too many files\n", progname, argv[0]);
                return rc;
        }

        if (mirror_id == 0) {
                fprintf(stderr, "%s %s: no valid mirror ID is provided\n",
                        progname, argv[0]);
                return rc;
        }

        /* open mirror file */
        fname = argv[optind];

        if (inputfile) {
                rc = check_same_file(fname, inputfile);
                if (rc == 0) {
                        fprintf(stderr,
                        "%s %s: input file cannot be the mirrored file\n",
                                progname, argv[0]);
                        return -EINVAL;
                }
                if (rc < 0)
                        return rc;
        }

        fd = open(fname, O_DIRECT | O_WRONLY);
        if (fd < 0) {
                fprintf(stderr, "%s %s: cannot open '%s': %s\n",
                        progname, argv[0], fname, strerror(errno));
                return rc;
        }

        /* verify mirror id */
        rc = verify_mirror_id_by_fd(fd, mirror_id);
        if (rc) {
                fprintf(stderr,
                        "%s %s: cannot find mirror with ID %u in '%s'\n",
                        progname, argv[0], mirror_id, fname);
                goto close_fd;
        }

        /* open input file */
        if (inputfile) {
                inputfd = open(inputfile, O_RDONLY, 0644);
                if (inputfd < 0) {
                        fprintf(stderr, "%s %s: cannot open file '%s': %s\n",
                                progname, argv[0], inputfile, strerror(errno));
                        rc = -errno;
                        goto close_fd;
                }
        } else {
                inputfd = STDIN_FILENO;
        }

        /* allocate buffer */
        rc = posix_memalign(&buf, page_size, buflen);
        if (rc) {
                fprintf(stderr, "%s %s: posix_memalign returns %d\n",
                        progname, argv[0], rc);
                goto close_inputfd;
        }

        /* prepare target mirror components instantiation */
        ioc.lil_mode = LL_LEASE_WRLCK;
        ioc.lil_flags = LL_LEASE_RESYNC;
        ioc.lil_mirror_id = mirror_id;
        rc = llapi_lease_set(fd, (struct ll_ioc_lease *)&ioc);
        if (rc < 0) {
                fprintf(stderr,
                        "%s %s: '%s' llapi_lease_get_ext failed: %s\n",
                        progname, argv[0], fname, strerror(errno));
                goto free_buf;
        }

        pos = 0;
        while (1) {
                ssize_t bytes_read;
                ssize_t written;
                size_t to_write;

                rc = llapi_lease_check(fd);
                if (rc != LL_LEASE_WRLCK) {
                        fprintf(stderr, "%s %s: '%s' lost lease lock\n",
                                progname, argv[0], fname);
                        goto free_buf;
                }

                bytes_read = read(inputfd, buf, buflen);
                if (bytes_read < 0) {
                        rc = bytes_read;
                        fprintf(stderr,
                                "%s %s: fail to read data from '%s': %s\n",
                                progname, argv[0], inputfile ? : "STDIN",
                                strerror(errno));
                        rc = -errno;
                        goto free_buf;
                }

                /* EOF reached */
                if (bytes_read == 0)
                        break;

                /* round up to page align to make direct IO happy. */
                to_write = (bytes_read + page_size - 1) & ~(page_size - 1);

                written = llapi_mirror_write(fd, mirror_id, buf, to_write,
                                             pos);
                if (written < 0) {
                        rc = written;
                        fprintf(stderr,
                              "%s %s: fail to write to mirror %u: %s\n",
                                progname, argv[0], mirror_id,
                                strerror(-rc));
                        goto free_buf;
                }

                pos += bytes_read;
        }

        if (pos & (page_size - 1)) {
                rc = llapi_mirror_truncate(fd, mirror_id, pos);
                if (rc < 0)
                        goto free_buf;
        }

        ioc.lil_mode = LL_LEASE_UNLCK;
        ioc.lil_flags = LL_LEASE_RESYNC_DONE;
        ioc.lil_count = 0;
        rc = llapi_lease_set(fd, (struct ll_ioc_lease *)&ioc);
        if (rc <= 0) {
                if (rc == 0)
                        rc = -EBUSY;
                fprintf(stderr,
                        "%s %s: release lease lock of '%s' failed: %s\n",
                        progname, argv[0], fname, strerror(errno));
                goto free_buf;
        }

        rc = 0;

free_buf:
        free(buf);
close_inputfd:
        if (inputfile)
                close(inputfd);
close_fd:
        close(fd);

        return rc;
}

struct collect_ids_data {
        __u16   *cid_ids;
        int     cid_count;
        __u16   cid_exclude;
};

static int collect_mirror_id(struct llapi_layout *layout, void *cbdata)
{
        struct collect_ids_data *cid = cbdata;
        uint32_t id;
        int rc;

        rc = llapi_layout_mirror_id_get(layout, &id);
        if (rc < 0)
                return rc;

        if ((__u16)id != cid->cid_exclude) {
                int i;

                for (i = 0; i < cid->cid_count; i++) {
                        /* already collected the mirror id */
                        if (id == cid->cid_ids[i])
                                return LLAPI_LAYOUT_ITER_CONT;
                }
                cid->cid_ids[cid->cid_count] = id;
                cid->cid_count++;
        }

        return LLAPI_LAYOUT_ITER_CONT;
}

static inline int get_other_mirror_ids(int fd, __u16 *ids, __u16 exclude_id)
{
        struct llapi_layout *layout;
        struct collect_ids_data cid = { .cid_ids = ids,
                                        .cid_count = 0,
                                        .cid_exclude = exclude_id, };
        int rc;

        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "could not get layout\n");
                return -EINVAL;
        }

        rc = llapi_layout_comp_iterate(layout, collect_mirror_id, &cid);
        if (rc < 0) {
                fprintf(stderr, "failed to iterate layout\n");
                llapi_layout_free(layout);

                return rc;
        }
        llapi_layout_free(layout);

        return cid.cid_count;
}

static inline int lfs_mirror_copy(int argc, char **argv)
{
        int rc = CMD_HELP;
        __u16 read_mirror_id = 0;
        __u16 ids[128] = { 0 };
        int count = 0;
        struct llapi_layout *layout = NULL;
        struct llapi_resync_comp comp_array[1024] = { { 0 } };
        int comp_size = 0;
        char *fname;
        int fd = 0;
        int c;
        int i;
        ssize_t copied;
        struct ll_ioc_lease *ioc = NULL;
        struct ll_ioc_lease_id *resync_ioc;

        struct option long_opts[] = {
        { .val = 'i',   .name = "read-mirror",  .has_arg = required_argument },
        { .val = 'o',   .name = "write-mirror", .has_arg = required_argument },
        { .name = NULL } };

        while ((c = getopt_long(argc, argv, "i:o:", long_opts, NULL)) >= 0) {
                char *end;

                switch (c) {
                case 'i':
                        read_mirror_id = strtoul(optarg, &end, 0);
                        if (*end != '\0' || read_mirror_id == 0) {
                                fprintf(stderr,
                                        "%s %s: invalid read mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return rc;
                        }
                        break;
                case 'o':
                        if (!strcmp(optarg, "-1")) {
                                /* specify all other mirrors */
                                ids[0] = (__u16)-1;
                                count = 1;
                        } else {
                                count = parse_mirror_ids((__u16 *)ids,
                                                         ARRAY_SIZE(ids),
                                                         optarg);
                                if (count < 0)
                                        return rc;
                        }
                        break;
                default:
                        fprintf(stderr, "%s: option '%s' unrecognized\n",
                                progname, argv[optind - 1]);
                        return -EINVAL;
                }
        }

        if (argc == optind) {
                fprintf(stderr, "%s %s: no mirrored file provided\n",
                        progname, argv[0]);
                return rc;
        } else if (argc > optind + 1) {
                fprintf(stderr, "%s %s: too many files\n", progname, argv[0]);
                return rc;
        }

        if (read_mirror_id == 0) {
                fprintf(stderr,
                        "%s %s: no valid read mirror ID %d is provided\n",
                        progname, argv[0], read_mirror_id);
                return rc;
        }

        if (count == 0) {
                fprintf(stderr,
                        "%s %s: no write mirror ID is provided\n",
                        progname, argv[0]);
                return rc;
        }

        for (i = 0; i < count; i++) {
                if (read_mirror_id == ids[i]) {
                        fprintf(stderr,
                        "%s %s: read and write mirror ID cannot be the same\n",
                                progname, argv[0]);
                        return rc;
                }
        }

        /* open mirror file */
        fname = argv[optind];

        fd = open(fname, O_DIRECT | O_RDWR);
        if (fd < 0) {
                fprintf(stderr, "%s %s: cannot open '%s': %s\n",
                        progname, argv[0], fname, strerror(errno));
                return rc;
        }

        /* write to all other mirrors */
        if (ids[0] == (__u16)-1) {
                count = get_other_mirror_ids(fd, ids, read_mirror_id);
                if (count <= 0) {
                        rc = count;
                        fprintf(stderr,
                        "%s %s: failed to get other mirror ids in '%s': %d\n",
                                progname, argv[0], fname, rc);
                        goto close_fd;
                }
        }

        /* verify mirror id */
        rc = verify_mirror_id_by_fd(fd, read_mirror_id);
        if (rc) {
                fprintf(stderr,
                        "%s %s: cannot find mirror with ID %u in '%s'\n",
                        progname, argv[0], read_mirror_id, fname);
                goto close_fd;
        }

        for (i = 0; i < count; i++) {
                rc = verify_mirror_id_by_fd(fd, ids[i]);
                if (rc) {
                        fprintf(stderr,
                        "%s %s: cannot find mirror with ID %u in '%s'\n",
                                progname, argv[0], ids[i], fname);
                        goto close_fd;
                }
        }

        ioc = calloc(sizeof(*ioc) + sizeof(__u32) * 4096, 1);
        if (ioc == NULL) {
                fprintf(stderr,
                        "%s %s: cannot alloc comp id array for ioc: %s\n",
                        progname, argv[0], strerror(errno));
                rc = -errno;
                goto close_fd;
        }

        /* get stale component info */
        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "%s %s: failed to get layout of '%s': %s\n",
                        progname, argv[0], fname, strerror(errno));
                rc = -errno;
                goto free_ioc;
        }
        comp_size = llapi_mirror_find_stale(layout, comp_array,
                                            ARRAY_SIZE(comp_array),
                                            ids, count);
        llapi_layout_free(layout);
        if (comp_size < 0) {
                rc = comp_size;
                goto free_ioc;
        }

        /* prepare target mirror components instantiation */
        resync_ioc = (struct ll_ioc_lease_id *)ioc;
        resync_ioc->lil_mode = LL_LEASE_WRLCK;
        resync_ioc->lil_flags = LL_LEASE_RESYNC;
        if (count == 1)
                resync_ioc->lil_mirror_id = ids[0];
        else
                resync_ioc->lil_mirror_id = read_mirror_id | MIRROR_ID_NEG;
        rc = llapi_lease_set(fd, ioc);
        if (rc < 0) {
                fprintf(stderr,
                        "%s %s: '%s' llapi_lease_get_ext failed: %s\n",
                        progname, argv[0], fname, strerror(errno));
                goto free_ioc;
        }

        copied = llapi_mirror_copy_many(fd, read_mirror_id, ids, count);
        if (copied < 0) {
                rc = copied;
                fprintf(stderr, "%s %s: copy error: %d\n",
                        progname, argv[0], rc);
                goto free_ioc;
        }

        fprintf(stdout, "mirror copied successfully: ");
        for (i = 0; i < copied; i++)
                fprintf(stdout, "%d ", ids[i]);
        fprintf(stdout, "\n");

        ioc->lil_mode = LL_LEASE_UNLCK;
        ioc->lil_flags = LL_LEASE_RESYNC_DONE;
        ioc->lil_count = 0;
        for (i = 0; i < comp_size; i++) {
                int j;

                for (j = 0; j < copied; j++) {
                        if (comp_array[i].lrc_mirror_id != ids[j])
                                continue;

                        ioc->lil_ids[ioc->lil_count] = comp_array[i].lrc_id;
                        ioc->lil_count++;
                }
        }
        rc = llapi_lease_set(fd, ioc);
        if (rc <= 0) {
                if (rc == 0)
                        rc = -EBUSY;
                fprintf(stderr,
                        "%s %s: release lease lock of '%s' failed: %s\n",
                        progname, argv[0], fname, strerror(errno));
                goto free_ioc;
        }

        rc = 0;

free_ioc:
        free(ioc);
close_fd:
        close(fd);

        return rc;
}
/**
 * struct verify_chunk - Mirror chunk to be verified.
 * @chunk:        [start, end) of the chunk.
 * @mirror_count: Number of mirror ids in @mirror_id array.
 * @mirror_id:    Array of valid mirror ids that cover the chunk.
 */
struct verify_chunk {
        struct lu_extent chunk;
        unsigned int mirror_count;
        __u16 mirror_id[LUSTRE_MIRROR_COUNT_MAX];
};

/**
 * print_chunks() - Print chunk information.
 * @fname:       Mirrored file name.
 * @chunks:      Array of chunks.
 * @chunk_count: Number of chunks in @chunks array.
 *
 * This function prints [start, end) of each chunk in @chunks
 * for mirrored file @fname, and also prints the valid mirror ids
 * that cover the chunk.
 *
 * Return: void.
 */
static inline
void print_chunks(const char *fname, struct verify_chunk *chunks,
                  int chunk_count)
{
        int i;
        int j;

        fprintf(stdout, "Chunks to be verified in %s:\n", fname);
        for (i = 0; i < chunk_count; i++) {
                fprintf(stdout, DEXT, PEXT(&chunks[i].chunk));

                if (chunks[i].mirror_count == 0)
                        fprintf(stdout, "\t[");
                else {
                        fprintf(stdout, "\t[%u", chunks[i].mirror_id[0]);
                        for (j = 1; j < chunks[i].mirror_count; j++)
                                fprintf(stdout, ", %u", chunks[i].mirror_id[j]);
                }
                fprintf(stdout, "]\t%u\n", chunks[i].mirror_count);
        }
        fprintf(stdout, "\n");
}

/**
 * print_checksums() - Print CRC-32 checksum values.
 * @chunk: A chunk and its corresponding valid mirror ids.
 * @crc:   CRC-32 checksum values on the chunk for each valid mirror.
 *
 * This function prints CRC-32 checksum values on @chunk for
 * each valid mirror that covers it.
 *
 * Return: void.
 */
static inline
void print_checksums(struct verify_chunk *chunk, unsigned long *crc)
{
        int i;

        fprintf(stdout,
                "CRC-32 checksum value for chunk "DEXT":\n",
                PEXT(&chunk->chunk));
        for (i = 0; i < chunk->mirror_count; i++)
                fprintf(stdout, "Mirror %u:\t%#lx\n",
                        chunk->mirror_id[i], crc[i]);
        fprintf(stdout, "\n");
}

/**
 * filter_mirror_id() - Filter specified mirror ids.
 * @chunks:      Array of chunks.
 * @chunk_count: Number of chunks in @chunks array.
 * @mirror_ids:  Specified mirror ids to be verified.
 * @ids_nr:      Number of specified mirror ids.
 *
 * This function scans valid mirror ids that cover each chunk in @chunks
 * and filters specified mirror ids.
 *
 * Return: void.
 */
static inline
void filter_mirror_id(struct verify_chunk *chunks, int chunk_count,
                      __u16 *mirror_ids, int ids_nr)
{
        int i;
        int j;
        int k;
        __u16 valid_id[LUSTRE_MIRROR_COUNT_MAX] = { 0 };
        unsigned int valid_count = 0;

        for (i = 0; i < chunk_count; i++) {
                if (chunks[i].mirror_count == 0)
                        continue;

                valid_count = 0;
                for (j = 0; j < ids_nr; j++) {
                        for (k = 0; k < chunks[i].mirror_count; k++) {
                                if (chunks[i].mirror_id[k] == mirror_ids[j]) {
                                        valid_id[valid_count] = mirror_ids[j];
                                        valid_count++;
                                        break;
                                }
                        }
                }

                memcpy(chunks[i].mirror_id, valid_id,
                       sizeof(__u16) * valid_count);
                chunks[i].mirror_count = valid_count;
        }
}

/**
 * lfs_mirror_prepare_chunk() - Find mirror chunks to be verified.
 * @layout:      Mirror component list.
 * @chunks:      Array of chunks.
 * @chunks_size: Array size of @chunks.
 *
 * This function scans the components in @layout from offset 0 to LUSTRE_EOF
 * to find out chunk segments and store them in @chunks array.
 *
 * The @mirror_id array in each element of @chunks will store the valid
 * mirror ids that cover the chunk. If a mirror component covering the
 * chunk has LCME_FL_STALE or LCME_FL_OFFLINE flag, then the mirror id
 * will not be stored into the @mirror_id array, and the chunk for that
 * mirror will not be verified.
 *
 * The @mirror_count in each element of @chunks will store the number of
 * mirror ids in @mirror_id array. If @mirror_count is 0, it indicates the
 * chunk is invalid in all of the mirrors. And if @mirror_count is 1, it
 * indicates the chunk is valid in only one mirror. In both cases, the
 * chunk will not be verified.
 *
 * Here is an example:
 *
 *  0      1M     2M     3M     4M           EOF
 *  +------+-------------+--------------------+
 *  |      |             |      S             |       mirror1
 *  +------+------+------+------+-------------+
 *  |             |   S  |   S  |             |       mirror2
 *  +-------------+------+------+-------------+
 *
 * prepared @chunks array will contain 5 elements:
 * (([0, 1M), [1, 2], 2),
 *  ([1M, 2M), [1, 2], 2),
 *  ([2M, 3M), [1], 1),
 *  ([3M, 4M], [], 0),
 *  ([4M, EOF), [2], 1))
 *
 * Return: the actual array size of @chunks on success
 *         or a negative error code on failure.
 */
static inline
int lfs_mirror_prepare_chunk(struct llapi_layout *layout,
                             struct verify_chunk *chunks,
                             size_t chunks_size)
{
        uint64_t start;
        uint64_t end;
        uint32_t mirror_id;
        uint32_t flags;
        int idx = 0;
        int i = 0;
        int rc = 0;

        memset(chunks, 0, sizeof(*chunks) * chunks_size);

        while (1) {
                rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
                if (rc < 0) {
                        fprintf(stderr,
                                "%s: move to the first layout component: %s.\n",
                                progname, strerror(errno));
                        goto error;
                }

                i = 0;
                rc = 0;
                chunks[idx].chunk.e_end = LUSTRE_EOF;
                while (rc == 0) {
                        rc = llapi_layout_comp_extent_get(layout, &start, &end);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: llapi_layout_comp_extent_get failed: %s.\n",
                                        progname, strerror(errno));
                                goto error;
                        }

                        if (start > chunks[idx].chunk.e_start ||
                            end <= chunks[idx].chunk.e_start)
                                goto next;

                        if (end < chunks[idx].chunk.e_end)
                                chunks[idx].chunk.e_end = end;

                        rc = llapi_layout_comp_flags_get(layout, &flags);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: llapi_layout_comp_flags_get failed: %s.\n",
                                        progname, strerror(errno));
                                goto error;
                        }

                        if (flags & LCME_FL_STALE || flags & LCME_FL_OFFLINE)
                                goto next;

                        rc = llapi_layout_mirror_id_get(layout, &mirror_id);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: llapi_layout_mirror_id_get failed: %s.\n",
                                        progname, strerror(errno));
                                goto error;
                        }

                        chunks[idx].mirror_id[i] = mirror_id;
                        i++;
                        if (i >= ARRAY_SIZE(chunks[idx].mirror_id)) {
                                fprintf(stderr,
                                        "%s: mirror_id array is too small.\n",
                                        progname);
                                rc = -EINVAL;
                                goto error;
                        }

                next:
                        rc = llapi_layout_comp_use(layout,
                                                   LLAPI_LAYOUT_COMP_USE_NEXT);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: move to the next layout component: %s.\n",
                                        progname, strerror(errno));
                                goto error;
                        }
                } /* loop through all components */

                chunks[idx].mirror_count = i;

                if (chunks[idx].chunk.e_end == LUSTRE_EOF)
                        break;

                idx++;
                if (idx >= chunks_size) {
                        fprintf(stderr, "%s: chunks array is too small.\n",
                                progname);
                        rc = -EINVAL;
                        goto error;
                }

                chunks[idx].chunk.e_start = chunks[idx - 1].chunk.e_end;
        }

error:
        return rc < 0 ? rc : idx + 1;
}

/**
 * lfs_mirror_verify_chunk() - Verify a chunk.
 * @fd:        File descriptor of the mirrored file.
 * @file_size: Size of the mirrored file.
 * @chunk:     A chunk and its corresponding valid mirror ids.
 * @verbose:   Verbose mode.
 *
 * This function verifies a @chunk contains exactly the same data
 * ammong the mirrors that cover it.
 *
 * If @verbose is specified, then the function will print where the
 * differences are if the data do not match. Otherwise, it will
 * just return an error in that case.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static inline
int lfs_mirror_verify_chunk(int fd, size_t file_size,
                            struct verify_chunk *chunk, int verbose)
{
        const size_t buflen = 4 * 1024 * 1024; /* 4M */
        void *buf;
        size_t page_size = sysconf(_SC_PAGESIZE);
        ssize_t bytes_read;
        ssize_t bytes_done;
        size_t count;
        off_t pos;
        unsigned long crc;
        unsigned long crc_array[LUSTRE_MIRROR_COUNT_MAX] = { 0 };
        int i;
        int rc = 0;

        if (file_size == 0)
                return 0;

        rc = posix_memalign(&buf, page_size, buflen);
        if (rc) /* error code is returned directly */
                return -rc;

        if (verbose > 1) {
                fprintf(stdout, "Verifying chunk "DEXT" on mirror:",
                        PEXT(&chunk->chunk));
                for (i = 0; i < chunk->mirror_count; i++)
                        fprintf(stdout, " %u", chunk->mirror_id[i]);
                fprintf(stdout, "\n");
        }

        bytes_done = 0;
        count = MIN(chunk->chunk.e_end, file_size) - chunk->chunk.e_start;
        pos = chunk->chunk.e_start;
        while (bytes_done < count) {
                /* compute initial CRC-32 checksum */
                crc = crc32(0L, Z_NULL, 0);
                memset(crc_array, 0, sizeof(crc_array));

                bytes_read = 0;
                for (i = 0; i < chunk->mirror_count; i++) {
                        bytes_read = llapi_mirror_read(fd, chunk->mirror_id[i],
                                                       buf, buflen, pos);
                        if (bytes_read < 0) {
                                rc = bytes_read;
                                fprintf(stderr,
                                        "%s: failed to read data from mirror %u: %s.\n",
                                        progname, chunk->mirror_id[i],
                                        strerror(-rc));
                                goto error;
                        }

                        /* compute new CRC-32 checksum */
                        crc_array[i] = crc32(crc, buf, bytes_read);
                }

                if (verbose)
                        print_checksums(chunk, crc_array);

                /* compare CRC-32 checksum values */
                for (i = 1; i < chunk->mirror_count; i++) {
                        if (crc_array[i] != crc_array[0]) {
                                rc = -EINVAL;

                                fprintf(stderr,
                                        "%s: chunk "DEXT" has different checksum value on mirror %u and mirror %u.\n",
                                        progname, PEXT(&chunk->chunk),
                                        chunk->mirror_id[0],
                                        chunk->mirror_id[i]);
                        }
                }

                pos += bytes_read;
                bytes_done += bytes_read;
        }

        if (verbose > 1 && rc == 0) {
                fprintf(stdout, "Verifying chunk "DEXT" on mirror:",
                        PEXT(&chunk->chunk));
                for (i = 0; i < chunk->mirror_count; i++)
                        fprintf(stdout, " %u", chunk->mirror_id[i]);
                fprintf(stdout, " PASS\n\n");
        }

error:
        free(buf);
        return rc;
}

/**
 * lfs_mirror_verify_file() - Verify a mirrored file.
 * @fname:      Mirrored file name.
 * @mirror_ids: Specified mirror ids to be verified.
 * @ids_nr:     Number of specified mirror ids.
 * @verbose:    Verbose mode.
 *
 * This function verifies that each SYNC mirror of a mirrored file
 * specified by @fname contains exactly the same data.
 *
 * If @mirror_ids is specified, then the function will verify the
 * mirrors specified by @mirror_ids contain exactly the same data.
 *
 * If @verbose is specified, then the function will print where the
 * differences are if the data do not match. Otherwise, it will
 * just return an error in that case.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static inline
int lfs_mirror_verify_file(const char *fname, __u16 *mirror_ids, int ids_nr,
                           int verbose)
{
        struct verify_chunk chunks_array[1024] = { };
        struct llapi_layout *layout = NULL;
        struct stat stbuf;
        uint32_t flr_state;
        int fd;
        int chunk_count = 0;
        int idx = 0;
        int rc = 0;
        int rc1 = 0;
        int rc2 = 0;

        if (stat(fname, &stbuf) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }

        if (!S_ISREG(stbuf.st_mode)) {
                fprintf(stderr, "%s: '%s' is not a regular file.\n",
                        progname, fname);
                rc = -EINVAL;
                goto error;
        }

        if (stbuf.st_size == 0) {
                if (verbose)
                        fprintf(stdout, "%s: '%s' file size is 0.\n",
                                progname, fname);
                rc = 0;
                goto error;
        }

        fd = open(fname, O_DIRECT | O_RDONLY);
        if (fd < 0) {
                fprintf(stderr, "%s: cannot open '%s': %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto error;
        }

        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
                fprintf(stderr, "%s: '%s' llapi_lease_acquire failed: %s.\n",
                        progname, fname, strerror(errno));
                goto close_fd;
        }

        layout = llapi_layout_get_by_fd(fd, 0);
        if (layout == NULL) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                llapi_lease_release(fd);
                goto close_fd;
        }

        rc = llapi_layout_flags_get(layout, &flr_state);
        if (rc < 0) {
                fprintf(stderr, "%s: '%s' llapi_layout_flags_get failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
                goto free_layout;
        }

        flr_state &= LCM_FL_FLR_MASK;
        switch (flr_state) {
        case LCM_FL_NONE:
                rc = -EINVAL;
                fprintf(stderr, "%s: '%s' file state error: %s.\n",
                        progname, fname, llapi_layout_flags_string(flr_state));
                goto free_layout;
        default:
                break;
        }

        /* find out mirror chunks to be verified */
        chunk_count = lfs_mirror_prepare_chunk(layout, chunks_array,
                                               ARRAY_SIZE(chunks_array));
        if (chunk_count < 0) {
                rc = chunk_count;
                goto free_layout;
        }

        if (ids_nr > 0)
                /* filter specified mirror ids */
                filter_mirror_id(chunks_array, chunk_count, mirror_ids, ids_nr);

        if (verbose > 2)
                print_chunks(fname, chunks_array, chunk_count);

        for (idx = 0; idx < chunk_count; idx++) {
                if (chunks_array[idx].chunk.e_start >= stbuf.st_size) {
                        if (verbose)
                                fprintf(stdout,
                                        "%s: '%s' chunk "DEXT" exceeds file size %#llx: skipped\n",
                                        progname, fname,
                                        PEXT(&chunks_array[idx].chunk),
                                        (unsigned long long)stbuf.st_size);
                        break;
                }

                if (chunks_array[idx].mirror_count == 0) {
                        fprintf(stderr,
                                "%s: '%s' chunk "DEXT" is invalid in all of the mirrors: ",
                                progname, fname,
                                PEXT(&chunks_array[idx].chunk));
                        if (verbose) {
                                fprintf(stderr, "skipped\n");
                                continue;
                        }
                        rc = -EINVAL;
                        fprintf(stderr, "failed\n");
                        goto free_layout;
                }

                if (chunks_array[idx].mirror_count == 1) {
                        if (verbose)
                                fprintf(stdout,
                                        "%s: '%s' chunk "DEXT" is only valid in mirror %u: skipped\n",
                                        progname, fname,
                                        PEXT(&chunks_array[idx].chunk),
                                        chunks_array[idx].mirror_id[0]);
                        continue;
                }

                rc = llapi_lease_check(fd);
                if (rc != LL_LEASE_RDLCK) {
                        fprintf(stderr, "%s: '%s' lost lease lock.\n",
                                progname, fname);
                        goto free_layout;
                }

                /* verify one chunk */
                rc1 = lfs_mirror_verify_chunk(fd, stbuf.st_size,
                                              &chunks_array[idx], verbose);
                if (rc1 < 0) {
                        rc2 = rc1;
                        if (!verbose) {
                                rc = rc1;
                                goto free_layout;
                        }
                }
        }

        if (rc2 < 0)
                rc = rc2;

free_layout:
        llapi_layout_free(layout);
        llapi_lease_release(fd);
close_fd:
        close(fd);
error:
        return rc;
}

/**
 * lfs_mirror_verify() - Parse and execute lfs mirror verify command.
 * @argc: The count of lfs mirror verify command line arguments.
 * @argv: Array of strings for lfs mirror verify command line arguments.
 *
 * This function parses lfs mirror verify command and verifies the
 * specified mirrored file(s).
 *
 * Return: 0 on success or a negative error code on failure.
 */
static inline int lfs_mirror_verify(int argc, char **argv)
{
        __u16 mirror_ids[LUSTRE_MIRROR_COUNT_MAX] = { 0 };
        int ids_nr = 0;
        int c;
        int verbose = 0;
        int rc = 0;
        int rc1 = 0;
        char cmd[PATH_MAX];

        struct option long_opts[] = {
        { .val = 'o',   .name = "only",         .has_arg = required_argument },
        { .val = 'v',   .name = "verbose",      .has_arg = no_argument },
        { .name = NULL } };

        snprintf(cmd, sizeof(cmd), "%s %s", progname, argv[0]);
        progname = cmd;
        while ((c = getopt_long(argc, argv, "o:v", long_opts, NULL)) >= 0) {
                switch (c) {
                case 'o':
                        rc = parse_mirror_ids(mirror_ids,
                                              ARRAY_SIZE(mirror_ids),
                                              optarg);
                        if (rc < 0) {
                                fprintf(stderr,
                                        "%s: bad mirror ids '%s'.\n",
                                        progname, optarg);
                                goto error;
                        }
                        ids_nr = rc;
                        if (ids_nr < 2) {
                                fprintf(stderr,
                                        "%s: at least 2 mirror ids needed with '--only' option.\n",
                                        progname);
                                rc = CMD_HELP;
                                goto error;
                        }
                        break;
                case 'v':
                        verbose++;
                        break;
                default:
                        fprintf(stderr, "%s: option '%s' unrecognized.\n",
                                progname, argv[optind - 1]);
                        rc = -EINVAL;
                        goto error;
                }
        }

        if (argc == optind) {
                fprintf(stderr, "%s: no file name given.\n", progname);
                rc = CMD_HELP;
                goto error;
        }

        if (ids_nr > 0 && argc > optind + 1) {
                fprintf(stderr,
                        "%s: '--only' cannot be used upon multiple files.\n",
                        progname);
                rc = CMD_HELP;
                goto error;

        }

        if (ids_nr > 0) {
                rc = verify_mirror_ids(argv[optind], mirror_ids, ids_nr);
                if (rc < 0)
                        goto error;
        }

        rc = 0;
        for (; optind < argc; optind++) {
                rc1 = lfs_mirror_verify_file(argv[optind], mirror_ids, ids_nr,
                                             verbose);
                if (rc1 < 0)
                        rc = rc1;
        }
error:
        return rc;
}

/**
 * lfs_mirror() - Parse and execute lfs mirror commands.
 * @argc: The count of lfs mirror command line arguments.
 * @argv: Array of strings for lfs mirror command line arguments.
 *
 * This function parses lfs mirror commands and performs the
 * corresponding functions specified in mirror_cmdlist[].
 *
 * Return: 0 on success or an error code on failure.
 */
static int lfs_mirror(int argc, char **argv)
{
        char cmd[PATH_MAX];
        int rc = 0;

        setlinebuf(stdout);

        Parser_init("lfs-mirror > ", mirror_cmdlist);

        snprintf(cmd, sizeof(cmd), "%s %s", progname, argv[0]);
        progname = cmd;
        program_invocation_short_name = cmd;
        if (argc > 1)
                rc = Parser_execarg(argc - 1, argv + 1, mirror_cmdlist);
        else
                rc = Parser_commands();

        return rc < 0 ? -rc : rc;
}

static void lustre_som_swab(struct lustre_som_attrs *attrs)
{
#if __BYTE_ORDER == __BIG_ENDIAN
        __swab16s(&attrs->lsa_valid);
        __swab64s(&attrs->lsa_size);
        __swab64s(&attrs->lsa_blocks);
#endif
}

enum lfs_som_type {
        LFS_SOM_SIZE = 0x1,
        LFS_SOM_BLOCKS = 0x2,
        LFS_SOM_FLAGS = 0x4,
        LFS_SOM_ATTR_ALL = LFS_SOM_SIZE | LFS_SOM_BLOCKS |
                           LFS_SOM_FLAGS,
};

static int lfs_getsom(int argc, char **argv)
{
        const char *path;
        struct lustre_som_attrs *attrs;
        char buf[sizeof(*attrs) + 64];
        enum lfs_som_type type = LFS_SOM_ATTR_ALL;
        int rc = 0, c;

        while ((c = getopt(argc, argv, "sbf")) != -1) {
                switch (c) {
                case 's':
                        type = LFS_SOM_SIZE;
                        break;
                case 'b':
                        type = LFS_SOM_BLOCKS;
                        break;
                case 'f':
                        type = LFS_SOM_FLAGS;
                        break;
                default:
                        fprintf(stderr, "%s: invalid option '%c'\n",
                                progname, optopt);
                        return CMD_HELP;
                }
        }

        argc -= optind;
        argv += optind;

        if (argc != 1) {
                fprintf(stderr, "%s: %s\n",
                        progname, argc == 0 ? "miss file target" :
                        "input more than 2 files");
                return CMD_HELP;
        }

        path = argv[0];
        attrs = (void *)buf;
        rc = lgetxattr(path, "trusted.som", attrs, sizeof(buf));
        if (rc < 0) {
                rc = -errno;
                fprintf(stderr, "%s failed to get som xattr: %s (%d)\n",
                        argv[0], strerror(errno), errno);
                return rc;
        }

        lustre_som_swab(attrs);

        switch (type) {
        case LFS_SOM_ATTR_ALL:
                printf("file: %s size: %llu blocks: %llu flags: %x\n",
                       path, attrs->lsa_size, attrs->lsa_blocks,
                       attrs->lsa_valid);
                break;
        case LFS_SOM_SIZE:
                printf("%llu\n", attrs->lsa_size);
                break;
        case LFS_SOM_BLOCKS:
                printf("%llu\n", attrs->lsa_blocks);
                break;
        case LFS_SOM_FLAGS:
                printf("%x\n", attrs->lsa_valid);
                break;
        default:
                fprintf(stderr, "%s: unknown option\n", progname);
                return CMD_HELP;
        }

        return 0;
}

/**
 * lfs_mirror_list_commands() - List lfs mirror commands.
 * @argc: The count of command line arguments.
 * @argv: Array of strings for command line arguments.
 *
 * This function lists lfs mirror commands defined in mirror_cmdlist[].
 *
 * Return: 0 on success.
 */
static int lfs_mirror_list_commands(int argc, char **argv)
{
        char buffer[81] = "";

        Parser_list_commands(mirror_cmdlist, buffer, sizeof(buffer),
                             NULL, 0, 4);

        return 0;
}

static int lfs_list_commands(int argc, char **argv)
{
        char buffer[81] = ""; /* 80 printable chars + terminating NUL */

        Parser_list_commands(cmdlist, buffer, sizeof(buffer), NULL, 0, 4);

        return 0;
}

int main(int argc, char **argv)
{
        int rc;

        /* Ensure that liblustreapi constructor has run */
        if (!llapi_liblustreapi_initialized())
                fprintf(stderr, "liblustreapi was not properly initialized\n");

        setlinebuf(stdout);
        opterr = 0;

        Parser_init("lfs > ", cmdlist);

        progname = program_invocation_short_name; /* Used in error messages */
        if (argc > 1) {
                llapi_set_command_name(argv[1]);
                rc = Parser_execarg(argc - 1, argv + 1, cmdlist);
                llapi_clear_command_name();
        } else {
                rc = Parser_commands();
        }

        return rc < 0 ? -rc : rc;
}

#ifdef _LUSTRE_IDL_H_
/* Everything we need here should be included by lustreapi.h. */
# error "lfs should not depend on lustre_idl.h"
#endif /* _LUSTRE_IDL_H_ */