Whamcloud - gitweb
LU-14521 flr: delete mirror without volatile file
[fs/lustre-release.git] / lustre / utils / lfs.c
index 3fe36f2..2ad1dc0 100644 (file)
@@ -27,7 +27,6 @@
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
  *
  * lustre/utils/lfs.c
  *
 #include <libcfs/util/string.h>
 #include <libcfs/util/ioctl.h>
 #include <libcfs/util/parser.h>
+#include <libcfs/util/string.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 */
+#include <lnetconfig/cyaml.h>
+#include "lstddef.h"
 
 /* all functions */
 static int lfs_find(int argc, char **argv);
@@ -87,6 +84,7 @@ 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_unlink_foreign(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);
@@ -98,13 +96,12 @@ 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_rmfid(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);
@@ -119,6 +116,8 @@ 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_heat_get(int argc, char **argv);
+static int lfs_heat_set(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);
@@ -126,6 +125,25 @@ 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);
+static int lfs_pcc_attach(int argc, char **argv);
+static int lfs_pcc_attach_fid(int argc, char **argv);
+static int lfs_pcc_detach(int argc, char **argv);
+static int lfs_pcc_detach_fid(int argc, char **argv);
+static int lfs_pcc_state(int argc, char **argv);
+static int lfs_pcc(int argc, char **argv);
+static int lfs_pcc_list_commands(int argc, char **argv);
+static int lfs_migrate_to_dom(int fd, int fdv, char *name,
+                             __u64 migration_flags,
+                             struct llapi_stripe_param *param,
+                             struct llapi_layout *layout);
+
+struct pool_to_id_cbdata {
+       const char *pool;
+       __u32 id;
+};
+static int find_comp_id_by_pool(struct llapi_layout *layout, void *cbdata);
+static int find_mirror_id_by_pool(struct llapi_layout *layout, void *cbdata);
 
 enum setstripe_origin {
        SO_SETSTRIPE,
@@ -134,7 +152,9 @@ enum setstripe_origin {
        SO_MIRROR_CREATE,
        SO_MIRROR_EXTEND,
        SO_MIRROR_SPLIT,
+       SO_MIRROR_DELETE,
 };
+
 static int lfs_setstripe_internal(int argc, char **argv,
                                  enum setstripe_origin opc);
 
@@ -142,59 +162,78 @@ 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);
 }
 
+static inline int lfs_mirror_delete(int argc, char **argv)
+{
+       return lfs_setstripe_internal(argc, argv, SO_MIRROR_DELETE);
+}
+
 /* 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"         \
+       "                 [--overstripe-count|-C <stripe_count>]\n"     \
        "                 [--stripe-index|-i <start_ost_idx>]\n"        \
        "                 [--stripe-size|-S <stripe_size>]\n"           \
+       "                 [--extension-size|--ext-size|-z]\n"           \
        "                 [--layout|-L <pattern>]\n"                    \
-       "                 [--pool|-p <pool_name>]\n"                    \
+       "                 [--mirror-count|-N[mirror_count]]\n"          \
        "                 [--ost|-o <ost_indices>]\n"                   \
+       "                 [--pool|-p <pool_name>]\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" \
+       "\tstripe_count: Number of OSTs to stripe on (0=fs default, -1 all)\n" \
+       "\t              Using -C instead of -c allows overstriping, which\n"  \
+       "\t              will place more than one stripe per OST if\n"         \
+       "\t              stripe_count is greater than the number of OSTs.\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"\
+       "\tstripe_size:  Number of bytes on each OST (0=fs default)\n"         \
+       "\t              Optional K, M, or G suffix (for KB, MB, GB\n"         \
+       "\t              respectively).  Must be a multiple of 64KiB.\n"       \
+       "\textension_size:\n"                                                  \
+       "\t              Number of bytes the previous component is extended\n" \
+       "\t              each time. Optional K, M, or G suffix (for KB,\n"     \
+       "\t              MB, GB 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              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              Optional K, M, or G suffix (for KiB, MiB, GiB), or\n" \
+       "\t              -1 or 'eof' for max file size). Must be a multiple\n" \
+       "\t              of stripe_size and a multiple of 64KiB.\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                                                    \
@@ -204,7 +243,7 @@ static inline int lfs_mirror_split(int argc, char **argv)
        "\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"                                 \
+       "\tSETSTRIPE_OPTIONS: Mirror layout as with 'setstripe'\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"          \
@@ -221,8 +260,8 @@ static inline int lfs_mirror_split(int argc, char **argv)
        "\t              file.\n"
 
 #define MIRROR_EXTEND_USAGE                                                   \
-       "                 <--mirror-count|-N[mirror_count]>\n"                 \
-       "                 [setstripe options|-f <victim_file>]\n"              \
+       "                 {--mirror-count|-N[mirror_count]}\n"                 \
+       "                 [SETSTRIPE_OPTIONS|-f|--file <victim_file>]\n"       \
        "                 [--no-verify]\n"
 
 #define SETSTRIPE_USAGE                                                        \
@@ -252,10 +291,16 @@ static inline int lfs_mirror_split(int argc, char **argv)
        "\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"            \
+       "       crush     CRUSH hash algorithm (default)\n" \
+       "       fnv_1a_64 FNV-1a hash algorithm\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"
+       "\tmode: the file access permission of the directory (octal)\n" \
+       "To create dir with a foreign (free format) layout :\n" \
+       "setdirstripe|mkdir --foreign[=<foreign_type>] -x|-xattr <string> " \
+               "[--mode|-o mode] [--flags <hex>] <dir>\n" \
+       "\tmode: the mode of the directory\n" \
+       "\tforeign_type: none or symlink\n"
 
 /**
  * command_t mirror_cmdlist - lfs mirror commands.
@@ -265,22 +310,29 @@ command_t mirror_cmdlist[] = {
          .pc_help = "Create a mirrored file.\n"
                "usage: lfs mirror create "
                "<--mirror-count|-N[mirror_count]> "
-               "[setstripe options] ... <filename|directory>\n"
+               "[SETSTRIPE_OPTIONS] ... <filename|directory> ...\n"
          MIRROR_CREATE_HELP },
+       { .pc_name = "delete", .pc_func = lfs_mirror_delete,
+         .pc_help = "Delete a mirror from a file.\n"
+       "usage: lfs mirror delete {--mirror-id <mirror_id> |\n"
+       "\t               --component-id|--comp-id|-I <comp_id> |\n"
+       "\t               -p <pool>} <mirrored_file> ...\n"
+       },
        { .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"
+               "[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"
+       "usage: lfs mirror split <--mirror-id <mirror_id> |\n"
+       "\t             --component-id|-I <comp_id>|-p <pool>> [--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"
+       "\tpool:        Components on specified pool.\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"
@@ -293,6 +345,10 @@ command_t mirror_cmdlist[] = {
          .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[,...]>] "
@@ -310,22 +366,54 @@ command_t mirror_cmdlist[] = {
        { .pc_help = NULL }
 };
 
+/**
+ * command_t pcc_cmdlist - lfs pcc commands.
+ */
+command_t pcc_cmdlist[] = {
+       { .pc_name = "attach", .pc_func = lfs_pcc_attach,
+         .pc_help = "Attach given files to the Persistent Client Cache.\n"
+               "usage: lfs pcc attach <--id|-i NUM> <file> ...\n"
+               "\t-i: archive id for RW-PCC\n" },
+       { .pc_name = "attach_fid", .pc_func = lfs_pcc_attach_fid,
+         .pc_help = "Attach given files into PCC by FID(s).\n"
+               "usage: lfs pcc attach_id <--id|-i NUM> <--mnt|-m mnt> "
+               "<fid> ...\n"
+               "\t-i: archive id for RW-PCC\n"
+               "\t-m: Lustre mount point\n" },
+       { .pc_name = "state", .pc_func = lfs_pcc_state,
+         .pc_help = "Display the PCC state for given files.\n"
+               "usage: lfs pcc state <file> ...\n" },
+       { .pc_name = "detach", .pc_func = lfs_pcc_detach,
+         .pc_help = "Detach given files from the Persistent Client Cache.\n"
+               "usage: lfs pcc detach <file> ...\n" },
+       { .pc_name = "detach_fid", .pc_func = lfs_pcc_detach_fid,
+         .pc_help = "Detach given files from PCC by FID(s).\n"
+               "usage: lfs pcc detach_fid <mntpath> <fid>...\n" },
+       { .pc_name = "list-commands", .pc_func = lfs_pcc_list_commands,
+         .pc_help = "list commands supported by lfs pcc"},
+       { .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")
+        "                 [--mode <mode>]\n"
         "                 <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"
+        "usage: setstripe [--delete|-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"
+        "usage: setstripe {--mirror-count|-N}[mirror_count] [SETSTRIPE_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"
@@ -335,7 +423,17 @@ command_t cmdlist[] = {
         "\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"},
+        "\t-I and -F cannot be specified at the same time\n"
+        " or\n"
+        "To set or clear flags on a specific component\n"
+        "(note that this command can only be applied to mirrored files:\n"
+        "usage: setstripe --comp-set {-I comp_id|--comp-flags=comp_flags}\n"
+        "                            <filename>\n"
+        " or\n"
+        "To create a file with a foreign (free format) layout:\n"
+        "usage: setstripe --foreign[=<foreign_type>]\n"
+        "                 --xattr|-x <layout_string> [--flags <hex>]\n"
+        "                 [--mode <mode>] <filename>\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"
@@ -347,14 +445,15 @@ command_t cmdlist[] = {
         "                 [--component-id[=comp_id]|-I[comp_id]]\n"
         "                 [--component-flags[=comp_flags]]\n"
         "                 [--component-count]\n"
+        "                 [--extension-size|--ext-size|-z]\n"
         "                 [--component-start[=[+-]comp_start]]\n"
         "                 [--component-end[=[+-]comp_end]|-E[[+-]comp_end]]\n"
         "                 [[!] --mirror-index=[+-]<index> |\n"
-        "                  [!] --mirror-id=[+-]<id>]\n"
+        "                  [!] --mirror-id=[+-]<id>] [--mirror-count|-N]\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"
+        "Create striped directory on specified MDT, same as mkdir.\n"
+        "May be restricted to root or group users, depending on settings.\n"
         "usage: setdirstripe [OPTION] <directory>\n"
         SETDIRSTRIPE_USAGE},
        {"getdirstripe", lfs_getdirstripe, 0,
@@ -363,10 +462,9 @@ command_t cmdlist[] = {
         "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> ..."},
+        "                    [--verbose|-v] [--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"
+        "Create striped directory on specified MDT, same as setdirstripe.\n"
         "usage: mkdir [OPTION] <directory>\n"
         SETDIRSTRIPE_USAGE},
        {"rm_entry", lfs_rmentry, 0,
@@ -375,66 +473,75 @@ command_t cmdlist[] = {
         "will become inaccessable after this command. This can only be done\n"
         "by the administrator\n"
         "usage: rm_entry <dir>\n"},
+       {"unlink_foreign", lfs_unlink_foreign, 0,
+        "To remove the foreign file/dir.\n"
+        "Note: This is for files/dirs prevented to be removed using\n"
+        "unlink/rmdir, but works also for regular ones\n"
+        "usage: unlink_foreign <foreign_dir/file> [<foreign_dir/file> ...]\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"
+        "     [[!] --atime|-A [+-]N[smhdwy]] [[!] --ctime|-C [+-]N[smhdwy]]\n"
+        "     [[!] --mtime|-M [+-]N[smhdwy]]\n"
+        "     [[!] --btime|--Btime|-B [+-]N[smhdwy]]\n"
+        "     [[!] --newer[XY] <reference>] [[!] --blocks|-b N]\n"
+        "     [--maxdepth|-D N] [[!] --mdt-index|--mdt|-m <uuid|index,...>]\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"
+        "     [[!] --extension-size|--ext-size|-z [+-]N[kMGT]]\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"
+        "     [[!] --foreign[=<foreign_type>]]\n"
         "     [[!] --component-count [+-]<comp_cnt>]\n"
         "     [[!] --component-start [+-]N[kMGTPE]]\n"
         "     [[!] --component-end|-E [+-]N[kMGTPE]]\n"
-        "     [[!] --component-flags <comp_flags>]\n"
+        "     [[!] --component-flags {init,stale,prefer,offline,nosync,extension}]\n"
         "     [[!] --mirror-count|-N [+-]<n>]\n"
         "     [[!] --mirror-state <[^]state>]\n"
         "     [[!] --mdt-count|-T [+-]<stripes>]\n"
-        "     [[!] --mdt-hash|-H <hashtype>\n"
+        "     [[!] --mdt-hash|-H <[^][blm],[^]fnv_1a_64,all_char,crush,...>\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,
+        "\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"
+        "\t ^: used before a flag indicates to exclude it\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 ...] "},
+       {"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 [--inodes|-i] [--human-readable|-h] [--lazy|-l]\n"
+        "          [--pool|-p <fsname>[.<pool>]] [path]"},
+       {"getname", lfs_getname, 0,
+        "list instances and specified mount points [for specified path only]\n"
+        "Usage: getname [--help|-h] [--instance|-i] [--fsname|-n] [path ...]"},
 #ifdef HAVE_SYS_QUOTA_H
-        {"setquota", lfs_setquota, 0, "Set filesystem quotas.\n"
+       {"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"
+        "                -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"
+        "                [--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"
+        "                [--block-grace 'notify'|<block-grace>]\n"
+        "                [--inode-grace 'notify'|<inode-grace>] <filesystem>\n"
         "       setquota <-U|-G|-P>\n"
         "                -b <block-softlimit> -B <block-hardlimit>\n"
         "                -i <inode-softlimit> -I <inode-hardlimit> <filesystem>\n"
@@ -445,9 +552,9 @@ command_t cmdlist[] = {
         "                [--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"
+        "       -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"
@@ -457,8 +564,11 @@ command_t cmdlist[] = {
         "      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"
+        "      quota space.\n\n"
+        "      When setting the grace time, 'notify' can be used as grace to\n"
+        "      be notified after the quota is over soft limit but prevents\n"
+        "      the soft limit from becoming the hard limit."},
+       {"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"
@@ -476,32 +586,28 @@ command_t cmdlist[] = {
         "         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>"},
+       {"flushctx", lfs_flushctx, 0,
+        "Flush security context for current user.\n"
+        "usage: flushctx [-k] [-r] [mountpoint...]"},
+       {"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> ] */ },
+        "usage: fid2path [--print-fid|-f] [--print-link|-c] [--link|-l <linkno>] "
+        "<fsname|root> <fid>..."},
        {"path2fid", lfs_path2fid, 0, "Display the fid(s) for a given path(s).\n"
         "usage: path2fid [--parents] <path> ..."},
+       {"rmfid", lfs_rmfid, 0, "Remove file(s) by FID(s)\n"
+        "usage: rmfid <fsname|rootpath> <fid> ..."},
        {"data_version", lfs_data_version, 0, "Display file data version for "
-        "a given path.\n" "usage: data_version -[n|r|w] <path>"},
+        "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"
@@ -550,13 +656,15 @@ command_t cmdlist[] = {
         "                      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"
+        "              all_char  (type 1)sum of characters % MDT_COUNT\n"
+        "              fnv_1a_64 (type 2)FNV-1a hash algorithm (default)\n"
+        "              crush     (type 3)CRUSH hash algorithm\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"
+        "[--overstripe-count|-C] <stripe_count>\n"
         "              [--stripe-index|-i] <start_ost_index>\n"
         "              [--stripe-size|-S] <stripe_size>\n"
         "              [--pool|-p] <pool_name>\n"
@@ -566,12 +674,15 @@ command_t cmdlist[] = {
         "              [--non-direct|-D]\n"
         "              <file|directory>\n"
         "\tstripe_count:     number of OSTs to stripe a file over\n"
+        "\t              Using -C instead of -c allows overstriping, which\n"
+        "\t              will place more than one stripe per OST if\n"
+        "\t              stripe_count is greater than the number of OSTs\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:            wait for the operation to return before continuing\n"
-        "\tnon-block:        do not wait for the operation to return\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, "
@@ -593,12 +704,29 @@ command_t cmdlist[] = {
         "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"},
+       {"heat_get", lfs_heat_get, 0,
+        "To get heat of files.\n"
+        "usage: heat_get <file> ...\n"},
+       {"heat_set", lfs_heat_set, 0,
+        "To set heat flags of files.\n"
+        "usage: heat_set [--clear|-c] [--off|-o] [--on|-O] <file> ...\n"
+        "\t--clear|-c: Clear file heat for given files\n"
+        "\t--off|-o:   Turn off file heat for given files\n"
+        "\t--on|-O:    Turn on file heat for given files\n"},
+       {"pcc", lfs_pcc, pcc_cmdlist,
+        "lfs commands used to interact with PCC features:\n"
+        "lfs pcc attach - attach given files to Persistent Client Cache\n"
+        "lfs pcc attach_fid - attach given files into PCC by FID(s)\n"
+        "lfs pcc state  - display the PCC state for given files\n"
+        "lfs pcc detach - detach given files from Persistent Client Cache\n"
+        "lfs pcc detach_fid - detach given files from PCC by FID(s)\n"},
        {"help", Parser_help, 0, "help"},
        {"exit", Parser_quit, 0, "quit"},
        {"quit", Parser_quit, 0, "quit"},
@@ -609,11 +737,16 @@ command_t cmdlist[] = {
        { 0, 0, 0, NULL }
 };
 
-
 static int check_hashtype(const char *hashtype)
 {
+       int type_num = atoi(hashtype);
        int i;
 
+       /* numeric hash type */
+       if (hashtype && strlen(hashtype) == 1 &&
+           (type_num > 0 && type_num < LMV_HASH_TYPE_MAX))
+               return type_num;
+       /* string hash type */
        for (i = LMV_HASH_TYPE_ALL_CHARS; i < LMV_HASH_TYPE_MAX; i++)
                if (strcmp(hashtype, mdt_hash_name[i]) == 0)
                        return i;
@@ -621,6 +754,20 @@ static int check_hashtype(const char *hashtype)
        return 0;
 }
 
+static uint32_t check_foreign_type_name(const char *foreign_type_name)
+{
+       uint32_t i;
+
+       for (i = 0; i < LU_FOREIGN_TYPE_UNKNOWN; i++) {
+               if (!lu_foreign_types[i].lft_name)
+                       break;
+               if (strcmp(foreign_type_name,
+                          lu_foreign_types[i].lft_name) == 0)
+                       return lu_foreign_types[i].lft_type;
+       }
+
+       return LU_FOREIGN_TYPE_UNKNOWN;
+}
 
 static const char *error_loc = "syserror";
 
@@ -631,9 +778,6 @@ enum {
        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,
@@ -651,7 +795,7 @@ migrate_open_files(const char *name, __u64 migration_flags,
        struct stat              st;
        struct stat              stv;
 
-       if (param == NULL && layout == NULL) {
+       if (!param && !layout) {
                error_loc = "layout information";
                return -EINVAL;
        }
@@ -664,8 +808,8 @@ migrate_open_files(const char *name, __u64 migration_flags,
 
        strncpy(parent, name, sizeof(parent));
        ptr = strrchr(parent, '/');
-       if (ptr == NULL) {
-               if (getcwd(parent, sizeof(parent)) == NULL) {
+       if (!ptr) {
+               if (!getcwd(parent, sizeof(parent))) {
                        error_loc = "getcwd";
                        return -errno;
                }
@@ -677,7 +821,8 @@ migrate_open_files(const char *name, __u64 migration_flags,
 
        /* open file, direct io */
        /* even if the file is only read, WR mode is nedeed to allow
-        * layout swap on fd */
+        * layout swap on fd
+        */
        rflags = O_RDWR;
        if (!(migration_flags & MIGRATION_NONDIRECT))
                rflags |= O_DIRECT;
@@ -708,12 +853,17 @@ migrate_open_files(const char *name, __u64 migration_flags,
                }
 
                /* create, open a volatile file, use caching (ie no directio) */
-               if (param != NULL)
+               if (layout) {
+                       /* Returns -1 and sets errno on error: */
+                       fdv = llapi_layout_file_open(volatile_file, open_flags,
+                                                    open_mode, layout);
+                       if (fdv < 0)
+                               fdv = -errno;
+               } else {
+                       /* Does the right thing on error: */
                        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) {
@@ -721,11 +871,14 @@ migrate_open_files(const char *name, __u64 migration_flags,
                goto out;
        }
 
-       /* In case the MDT does not support creation of volatile files
-        * we should try to unlink it. */
+       /*
+        * 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.
+       /*
+        * 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.
         */
@@ -769,17 +922,16 @@ out:
 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;
+       size_t buf_size = 4 * 1024 * 1024;
+       void *buf = NULL;
+       off_t pos = 0;
+       off_t data_end = 0;
+       size_t page_size = sysconf(_SC_PAGESIZE);
+       bool sparse;
+       int rc;
 
        layout = llapi_layout_get_by_fd(fd_src, 0);
-       if (layout != NULL) {
+       if (layout) {
                uint64_t stripe_size;
 
                rc = llapi_layout_stripe_size_get(layout, &stripe_size);
@@ -790,46 +942,85 @@ static int migrate_copy_data(int fd_src, int fd_dst, int (*check_file)(int))
        }
 
        /* Use a page-aligned buffer for direct I/O */
-       rc = posix_memalign(&buf, getpagesize(), buf_size);
+       rc = posix_memalign(&buf, page_size, buf_size);
        if (rc != 0)
                return -rc;
 
+       sparse = llapi_file_is_sparse(fd_src);
+       if (sparse) {
+               rc = ftruncate(fd_dst, pos);
+               if (rc < 0) {
+                       rc = -errno;
+                       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);
+               off_t data_off;
+               size_t to_read, to_write;
+               ssize_t rsize;
+
+               if (sparse && pos >= data_end) {
+                       size_t data_size;
+
+                       data_off = llapi_data_seek(fd_src, pos, &data_size);
+                       if (data_off < 0) {
+                               /* Non-fatal, switch to full copy */
+                               sparse = false;
+                               continue;
+                       }
+                       /* hole at the end of file, truncate up to it */
+                       if (!data_size) {
+                               rc = ftruncate(fd_dst, data_off);
                                if (rc < 0)
-                                       break;
+                                       goto out;
                        }
+                       pos = data_off & ~(page_size - 1);
+                       data_end = data_off + data_size;
+                       to_read = ((data_end - pos - 1) | (page_size - 1)) + 1;
+                       to_read = MIN(to_read, buf_size);
+               } else {
+                       to_read = buf_size;
+               }
 
-                       rsize = read(fd_src, buf, buf_size);
-                       if (rsize < 0) {
-                               rc = -errno;
-                               break;
-                       }
-                       rpos += rsize;
-                       bufoff = 0;
+               if (check_file) {
+                       rc = check_file(fd_src);
+                       if (rc < 0)
+                               goto out;
                }
-               /* eof ? */
-               if (rsize == 0)
-                       break;
 
-               wsize = write(fd_dst, buf + bufoff, rpos - wpos);
-               if (wsize < 0) {
+               rsize = pread(fd_src, buf, to_read, pos);
+               if (rsize < 0) {
                        rc = -errno;
+                       goto out;
+               }
+               /* EOF */
+               if (rsize == 0)
                        break;
+
+               to_write = rsize;
+               while (to_write > 0) {
+                       ssize_t written;
+
+                       written = pwrite(fd_dst, buf, to_write, pos);
+                       if (written < 0) {
+                               rc = -errno;
+                               goto out;
+                       }
+                       pos += written;
+                       to_write -= written;
                }
-               wpos += wsize;
-               bufoff += wsize;
+               if (rc || rsize < to_read)
+                       break;
        }
 
-       if (rc == 0) {
-               rc = fsync(fd_dst);
-               if (rc < 0)
-                       rc = -errno;
-       }
+       rc = fsync(fd_dst);
+       if (rc < 0)
+               rc = -errno;
+out:
+       /* Try to avoid page cache pollution after migration. */
+       (void)posix_fadvise(fd_src, 0, 0, POSIX_FADV_DONTNEED);
+       (void)posix_fadvise(fd_dst, 0, 0, POSIX_FADV_DONTNEED);
 
        free(buf);
        return rc;
@@ -868,9 +1059,11 @@ static int migrate_block(int fd, int fdv)
                gid = random();
        while (gid == 0);
 
-       /* The grouplock blocks all concurrent accesses to the file.
+       /*
+        * 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. */
+        * block it too.
+        */
        rc = llapi_group_lock(fd, gid);
        if (rc < 0) {
                error_loc = "cannot get group lock";
@@ -890,11 +1083,13 @@ static int migrate_block(int fd, int fdv)
                goto out_unlock;
        }
 
-       /* swap layouts
+       /*
+        * 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. */
+        * 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) {
@@ -975,7 +1170,40 @@ static int migrate_nonblock(int fd, int fdv)
        return 0;
 }
 
-static int lfs_component_set(char *fname, int comp_id,
+static
+int lfs_layout_compid_by_pool(char *fname, const char *pool, int *comp_id)
+{
+       struct pool_to_id_cbdata data = { .pool = pool };
+       struct llapi_layout *layout = NULL;
+       int rc;
+
+       layout = llapi_layout_get_by_path(fname, 0);
+       if (!layout) {
+               fprintf(stderr,
+                       "error %s: file '%s' couldn't get layout: rc=%d\n",
+                       progname, fname, errno);
+               rc = -errno;
+               goto free_layout;
+       }
+       rc = llapi_layout_sanity(layout, false, true);
+       if (rc < 0) {
+               llapi_layout_sanity_perror(errno);
+               goto free_layout;
+       }
+       rc = llapi_layout_comp_iterate(layout, find_comp_id_by_pool, &data);
+       if (rc < 0)
+               goto free_layout;
+
+       *comp_id = data.id;
+       rc = 0;
+
+free_layout:
+       if (layout)
+               llapi_layout_free(layout);
+       return rc;
+}
+
+static int lfs_component_set(char *fname, int comp_id, const char *pool,
                             __u32 flags, __u32 neg_flags)
 {
        __u32 ids[2];
@@ -983,6 +1211,18 @@ static int lfs_component_set(char *fname, int comp_id,
        size_t count = 0;
        int rc;
 
+       if (!comp_id) {
+               if (pool == NULL) {
+                       fprintf(stderr,
+                               "error %s: neither component id nor pool is specified\n",
+                               progname);
+                       return -EINVAL;
+               }
+               rc = lfs_layout_compid_by_pool(fname, pool, &comp_id);
+               if (rc)
+                       return rc;
+       }
+
        if (flags) {
                ids[count] = comp_id;
                flags_array[count] = flags;
@@ -990,16 +1230,31 @@ static int lfs_component_set(char *fname, int comp_id,
        }
 
        if (neg_flags) {
+               if (neg_flags & LCME_FL_STALE) {
+                       fprintf(stderr,
+                               "%s: cannot clear 'stale' flags from component. Please use lfs-mirror-resync(1) instead\n",
+                               progname);
+                       return -EINVAL;
+               }
+
                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);
+       if (rc) {
+               if (errno == EUCLEAN) {
+                       rc = -errno;
+                       fprintf(stderr,
+                               "%s: cannot set 'stale' flag on component '%#x' of the last non-stale mirror of '%s'\n",
+                               progname, comp_id, fname);
+               } else {
+                       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;
 }
@@ -1018,7 +1273,6 @@ static int lfs_component_del(char *fname, __u32 comp_id,
        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,
@@ -1044,7 +1298,7 @@ static int lfs_component_add(char *fname, struct llapi_layout *layout)
 {
        int     rc;
 
-       if (layout == NULL)
+       if (!layout)
                return -EINVAL;
 
        rc = llapi_layout_file_comp_add(fname, layout);
@@ -1060,7 +1314,7 @@ static int lfs_component_create(char *fname, int open_flags, mode_t open_mode,
        struct stat     st;
        int     fd;
 
-       if (layout == NULL)
+       if (!layout)
                return -EINVAL;
 
        fd = lstat(fname, &st);
@@ -1081,6 +1335,8 @@ static int lfs_migrate(char *name, __u64 migration_flags,
                       struct llapi_stripe_param *param,
                       struct llapi_layout *layout)
 {
+       struct llapi_layout *existing;
+       uint64_t dom_new, dom_cur;
        int fd = -1;
        int fdv = -1;
        int rc;
@@ -1090,11 +1346,44 @@ static int lfs_migrate(char *name, __u64 migration_flags,
        if (rc < 0)
                goto out;
 
+       rc = llapi_layout_dom_size(layout, &dom_new);
+       if (rc) {
+               error_loc = "cannot get new layout DoM size";
+               goto out;
+       }
+       /* special case for migration to DOM layout*/
+       existing = llapi_layout_get_by_fd(fd, 0);
+       if (!existing) {
+               error_loc = "cannot get existing layout";
+               goto out;
+       }
+
+       rc = llapi_layout_dom_size(existing, &dom_cur);
+       if (rc) {
+               error_loc = "cannot get current layout DoM size";
+               goto out;
+       }
+
+       /*
+        * if file has DoM layout already then migration is possible to
+        * the new layout with the same DoM component via swap layout,
+        * if new layout used bigger DOM size, then mirroring is used
+        */
+       if (dom_new > dom_cur) {
+               rc = lfs_migrate_to_dom(fd, fdv, name, migration_flags, param,
+                                       layout);
+               if (rc)
+                       error_loc = "cannot migrate to DOM layout";
+               goto out_closed;
+       }
+
        if (!(migration_flags & MIGRATION_NONBLOCK)) {
-               /* Blocking mode (forced if servers do not support file lease).
+               /*
+                * 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) */
+                * atomic swap/close (LU-6785)
+                */
                rc = migrate_block(fd, fdv);
                goto out;
        }
@@ -1111,9 +1400,11 @@ static int lfs_migrate(char *name, __u64 migration_flags,
                goto out;
        }
 
-       /* Atomically put lease, swap layouts and close.
+       /*
+        * Atomically put lease, swap layouts and close.
         * for a migration we need to check data version on file did
-        * not change. */
+        * not change.
+        */
        rc = llapi_fswap_layouts(fd, fdv, 0, 0, SWAP_LAYOUTS_CLOSE);
        if (rc < 0) {
                error_loc = "cannot swap layout";
@@ -1126,7 +1417,7 @@ out:
 
        if (fdv >= 0)
                close(fdv);
-
+out_closed:
        if (rc < 0)
                fprintf(stderr, "error: %s: %s: %s: %s\n",
                        progname, name, error_loc, strerror(-rc));
@@ -1139,13 +1430,24 @@ out:
 static int comp_str2flags(char *string, __u32 *flags, __u32 *neg_flags)
 {
        char *name;
-
-       if (string == NULL)
-               return -EINVAL;
+       char *dup_string = NULL;
+       int rc = 0;
 
        *flags = 0;
        *neg_flags = 0;
-       for (name = strtok(string, ","); name; name = strtok(NULL, ",")) {
+
+       if (!string || !string[0])
+               return -EINVAL;
+
+       dup_string = strdup(string);
+       if (!dup_string) {
+               llapi_printf(LLAPI_MSG_ERROR,
+                            "%s: insufficient memory\n",
+                            progname);
+               return -ENOMEM;
+       }
+
+       for (name = strtok(dup_string, ","); name; name = strtok(NULL, ",")) {
                bool found = false;
                int i;
 
@@ -1166,23 +1468,85 @@ static int comp_str2flags(char *string, __u32 *flags, __u32 *neg_flags)
                        llapi_printf(LLAPI_MSG_ERROR,
                                     "%s: component flag '%s' not supported\n",
                                     progname, name);
-                       return -EINVAL;
+                       rc = -EINVAL;
+                       goto out_free;
                }
        }
 
        if (!*flags && !*neg_flags)
-               return -EINVAL;
+               rc = -EINVAL;
 
        /* don't allow to set and exclude the same flag */
        if (*flags & *neg_flags)
+               rc = -EINVAL;
+
+out_free:
+       free(dup_string);
+       return rc;
+}
+
+static int mdthash_input(char *string, __u32 *inflags,
+                        __u32 *exflags, __u32 *type)
+{
+       char *name;
+       struct mhf_list {
+               char *name;
+               __u32 flag;
+       } mhflist[] = {
+               {"migrating", LMV_HASH_FLAG_MIGRATION},
+               {"badtype", LMV_HASH_FLAG_BAD_TYPE},
+               {"lostlmv", LMV_HASH_FLAG_LOST_LMV},
+       };
+
+       if (string == NULL)
+               return -EINVAL;
+
+       *inflags = 0;
+       *exflags = 0;
+       *type = 0;
+       for (name = strtok(string, ","); name; name = strtok(NULL, ",")) {
+               bool found = false;
+               int i;
+
+               for (i = 0; i < ARRAY_SIZE(mhflist); i++) {
+                       if (strcmp(name, mhflist[i].name) == 0 ||
+                           name[0] == mhflist[i].name[0]) {
+                               *inflags |= mhflist[i].flag;
+                               found = true;
+                       } else if (name[0] == '^' &&
+                                  (strcmp(name + 1, mhflist[i].name) == 0 ||
+                                   name[1] == mhflist[i].name[0])) {
+                               *exflags |= mhflist[i].flag;
+                               found = true;
+                       }
+               }
+               if (!found) {
+                       i = check_hashtype(name);
+                       if (i > 0) {
+                               *type |= 1 << i;
+                               continue;
+                       }
+                       llapi_printf(LLAPI_MSG_ERROR,
+                                    "%s: invalid mdt_hash value '%s'\n",
+                                    progname, name);
+                       return -EINVAL;
+               }
+       }
+
+       /* don't allow to include and exclude the same flag */
+       if (*inflags & *exflags) {
+               llapi_printf(LLAPI_MSG_ERROR,
+                            "%s: include and exclude same flag '%s'\n",
+                            progname, string);
                return -EINVAL;
+       }
 
        return 0;
 }
 
 static int mirror_str2state(char *string, __u16 *state, __u16 *neg_state)
 {
-       if (string == NULL)
+       if (!string)
                return -EINVAL;
 
        *state = 0;
@@ -1221,71 +1585,9 @@ struct mirror_args {
        struct llapi_layout     *m_layout;
        const char              *m_file;
        struct mirror_args      *m_next;
+       bool                    m_inherit;
 };
 
-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)
@@ -1300,6 +1602,7 @@ enum mirror_flags {
        MF_NO_VERIFY    = 0x1,
        MF_DESTROY      = 0x2,
        MF_COMP_ID      = 0x4,
+       MF_COMP_POOL    = 0x8,
 };
 
 /**
@@ -1318,7 +1621,7 @@ static int mirror_create_sanity_check(const char *fname,
        bool has_m_file = false;
        bool has_m_layout = false;
 
-       if (list == NULL)
+       if (!list)
                return -EINVAL;
 
        if (fname) {
@@ -1332,21 +1635,24 @@ static int mirror_create_sanity_check(const char *fname,
                        return -ENODATA;
                }
 
-               rc = mirror_sanity_check_one(layout);
+               rc = llapi_layout_sanity(layout, false, true);
+
                llapi_layout_free(layout);
 
-               if (rc)
+               if (rc) {
+                       llapi_layout_sanity_perror(rc);
                        return rc;
+               }
        }
 
-       while (list != NULL) {
-               if (list->m_file != NULL) {
+       while (list) {
+               if (list->m_file) {
                        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) {
+                       if (!list->m_layout) {
                                fprintf(stderr,
                                        "error: %s: file '%s' has no layout\n",
                                        progname, list->m_file);
@@ -1354,16 +1660,18 @@ static int mirror_create_sanity_check(const char *fname,
                        }
                } else {
                        has_m_layout = true;
-                       if (list->m_layout == NULL) {
+                       if (!list->m_layout) {
                                fprintf(stderr, "error: %s: no mirror layout\n",
                                        progname);
                                return -EINVAL;
                        }
                }
 
-               rc = mirror_sanity_check_one(list->m_layout);
-               if (rc)
+               rc = llapi_layout_sanity(list->m_layout, false, true);
+               if (rc) {
+                       llapi_layout_sanity_perror(rc);
                        return rc;
+               }
 
                list = list->m_next;
        }
@@ -1420,7 +1728,7 @@ static int mirror_create(char *fname, struct mirror_args *mirror_list)
                return rc;
 
        cur_mirror = mirror_list;
-       while (cur_mirror != NULL) {
+       while (cur_mirror) {
                rc = llapi_layout_comp_iterate(cur_mirror->m_layout,
                                               mirror_set_flags,
                                               &cur_mirror->m_flags);
@@ -1435,8 +1743,8 @@ static int mirror_create(char *fname, struct mirror_args *mirror_list)
                        rc = llapi_layout_merge(&layout, cur_mirror->m_layout);
                        if (rc) {
                                rc = -errno;
-                               fprintf(stderr, "error: %s: "
-                                       "merge layout failed: %s\n",
+                               fprintf(stderr,
+                                       "error: %s: merge layout failed: %s\n",
                                        progname, strerror(errno));
                                goto error;
                        }
@@ -1445,7 +1753,7 @@ static int mirror_create(char *fname, struct mirror_args *mirror_list)
                cur_mirror = cur_mirror->m_next;
        }
 
-       if (layout == NULL) {
+       if (!layout) {
                fprintf(stderr, "error: %s: layout is NULL\n", progname);
                return -EINVAL;
        }
@@ -1499,8 +1807,10 @@ static ssize_t mirror_file_compare(int fd, int fdv)
                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 */
+               /*
+                * XXX: should compute the checksum on each buffer and then
+                * compare checksum to avoid cache collision
+                */
                if (memcmp(buf, buf + buflen, bytes_read))
                        break;
 
@@ -1583,7 +1893,6 @@ static int mirror_extend_file(const char *fname, const char *victim_file,
        if (rc < 0) {
                error_loc = "cannot get data version";
                goto out;
-
        }
 
        /* Make sure we keep original atime/mtime values */
@@ -1629,16 +1938,40 @@ out:
        return rc;
 }
 
-static int mirror_extend_layout(char *name, struct llapi_layout *layout)
+static int mirror_extend_layout(char *name, struct llapi_layout *m_layout,
+                               bool inherit, uint32_t flags)
 {
+       struct llapi_layout *f_layout = NULL;
        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;
+       int rc = 0;
+
+       if (inherit) {
+               f_layout = llapi_layout_get_by_path(name, 0);
+               if (!f_layout) {
+                       fprintf(stderr, "%s: cannot get layout\n", progname);
+                       goto out;
+               }
+               rc = llapi_layout_get_last_init_comp(f_layout);
+               if (rc) {
+                       fprintf(stderr, "%s: cannot get the last init comp\n",
+                               progname);
+                       goto out;
+               }
+               rc = llapi_layout_mirror_inherit(f_layout, m_layout);
+               if (rc) {
+                       fprintf(stderr,
+                               "%s: cannot inherit from the last init comp\n",
+                               progname);
+                       goto out;
+               }
+       }
+       llapi_layout_comp_flags_set(m_layout, flags);
+       rc = migrate_open_files(name, MIGRATION_NONDIRECT, NULL, m_layout, &fd,
+                               &fdv);
+       if (rc < 0)
+               goto out;
 
        rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
        if (rc < 0) {
@@ -1696,7 +2029,7 @@ static int mirror_extend(char *fname, struct mirror_args *mirror_list,
                return rc;
 
        while (mirror_list) {
-               if (mirror_list->m_file != NULL) {
+               if (mirror_list->m_file) {
                        rc = mirror_extend_file(fname, mirror_list->m_file,
                                                mirror_flags);
                } else {
@@ -1704,7 +2037,9 @@ static int mirror_extend(char *fname, struct mirror_args *mirror_list,
 
                        while (mirror_count > 0) {
                                rc = mirror_extend_layout(fname,
-                                                       mirror_list->m_layout);
+                                                       mirror_list->m_layout,
+                                                       mirror_list->m_inherit,
+                                                       mirror_list->m_flags);
                                if (rc)
                                        break;
 
@@ -1749,7 +2084,116 @@ static int find_comp_id(struct llapi_layout *layout, void *cbdata)
 
        return LLAPI_LAYOUT_ITER_CONT;
 }
-static int mirror_split(const char *fname, __u32 id,
+
+static int find_mirror_id_by_pool(struct llapi_layout *layout, void *cbdata)
+{
+       char buf[LOV_MAXPOOLNAME + 1];
+       struct pool_to_id_cbdata *d = (void *)cbdata;
+       uint32_t id;
+       int rc;
+
+       rc = llapi_layout_pool_name_get(layout, buf, sizeof(buf));
+       if (rc < 0)
+               return rc;
+       if (strcmp(d->pool, buf))
+               return LLAPI_LAYOUT_ITER_CONT;
+
+       rc = llapi_layout_mirror_id_get(layout, &id);
+       if (rc < 0)
+               return rc;
+       d->id = id;
+
+       return LLAPI_LAYOUT_ITER_STOP;
+}
+
+static int find_comp_id_by_pool(struct llapi_layout *layout, void *cbdata)
+{
+       char buf[LOV_MAXPOOLNAME + 1];
+       struct pool_to_id_cbdata *d = (void *)cbdata;
+       uint32_t id;
+       int rc;
+
+       rc = llapi_layout_pool_name_get(layout, buf, sizeof(buf));
+       if (rc < 0)
+               return rc;
+       if (strcmp(d->pool, buf))
+               return LLAPI_LAYOUT_ITER_CONT;
+
+       rc = llapi_layout_comp_id_get(layout, &id);
+       if (rc < 0)
+               return rc;
+       d->id = id;
+
+       return LLAPI_LAYOUT_ITER_STOP;
+}
+
+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;
+}
+
+/**
+ * last_non_stale_mirror() - Check if a mirror is the last non-stale mirror.
+ * @mirror_id: Mirror id to be checked.
+ * @layout:    Mirror component list.
+ *
+ * This function checks if a mirror with specified @mirror_id is the last
+ * non-stale mirror of a layout @layout.
+ *
+ * Return: true or false.
+ */
+static inline
+bool last_non_stale_mirror(__u16 mirror_id, struct llapi_layout *layout)
+{
+       __u16 mirror_ids[128] = { 0 };
+       struct collect_ids_data cid = { .cid_ids = mirror_ids,
+                                       .cid_count = 0,
+                                       .cid_exclude = mirror_id, };
+       int i;
+
+       llapi_layout_comp_iterate(layout, collect_mirror_id, &cid);
+
+       for (i = 0; i < cid.cid_count; i++) {
+               struct llapi_resync_comp comp_array[1024] = { { 0 } };
+               int comp_size = 0;
+
+               comp_size = llapi_mirror_find_stale(layout, comp_array,
+                                                   ARRAY_SIZE(comp_array),
+                                                   &mirror_ids[i], 1);
+               if (comp_size == 0)
+                       return false;
+       }
+
+       return true;
+}
+
+static int mirror_split(const char *fname, __u32 id, const char *pool,
                        enum mirror_flags mflags, const char *victim_file)
 {
        struct llapi_layout *layout;
@@ -1759,10 +2203,19 @@ static int mirror_split(const char *fname, __u32 id,
        char *ptr;
        struct ll_ioc_lease *data;
        uint16_t mirror_count;
+       __u32 mirror_id;
        int mdt_index;
        int fd, fdv;
+       bool purge = true; /* delete mirror by setting fdv=fd */
        int rc;
 
+       if (victim_file && (strcmp(fname, victim_file) == 0)) {
+               fprintf(stderr,
+                       "error %s: the source file '%s' and -f file are the same\n",
+                       progname, fname);
+               return -EINVAL;
+       }
+
        /* check fname contains mirror with mirror_id/comp_id */
        layout = llapi_layout_get_by_path(fname, 0);
        if (!layout) {
@@ -1772,9 +2225,11 @@ static int mirror_split(const char *fname, __u32 id,
                return -EINVAL;
        }
 
-       rc = mirror_sanity_check_one(layout);
-       if (rc)
+       rc = llapi_layout_sanity(layout, false, true);
+       if (rc) {
+               llapi_layout_sanity_perror(rc);
                goto free_layout;
+       }
 
        rc = llapi_layout_mirror_count_get(layout, &mirror_count);
        if (rc) {
@@ -1790,21 +2245,40 @@ static int mirror_split(const char *fname, __u32 id,
                goto free_layout;
        }
 
-       if (mflags & MF_COMP_ID) {
+       if (mflags & MF_COMP_POOL) {
+               struct pool_to_id_cbdata data = { .pool = pool };
+
+               rc = llapi_layout_comp_iterate(layout, find_mirror_id_by_pool,
+                                              &data);
+               mirror_id = data.id;
+       } else if (mflags & MF_COMP_ID) {
                rc = llapi_layout_comp_iterate(layout, find_comp_id, &id);
-               id = mirror_id_of(id);
+               mirror_id = mirror_id_of(id);
        } else {
                rc = llapi_layout_comp_iterate(layout, find_mirror_id, &id);
+               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;
+               if (mflags & MF_COMP_POOL) {
+                       fprintf(stderr,
+                               "error %s: file '%s' does not contain mirror with pool '%s'\n",
+                               progname, fname, pool);
+                       goto free_layout;
+               } else if (mflags & MF_COMP_ID) {
+                       fprintf(stderr,
+                               "error %s: file '%s' does not contain mirror with comp-id %u\n",
+                               progname, fname, id);
+                       goto free_layout;
+               } else {
+                       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);
@@ -1824,8 +2298,8 @@ static int mirror_split(const char *fname, __u32 id,
        }
        strncpy(parent, fname, sizeof(parent));
        ptr = strrchr(parent, '/');
-       if (ptr == NULL) {
-               if (getcwd(parent, sizeof(parent)) == NULL) {
+       if (!ptr) {
+               if (!getcwd(parent, sizeof(parent))) {
                        fprintf(stderr, "error %s: getcwd failed: %s\n",
                                progname, strerror(errno));
                        rc = -errno;
@@ -1844,14 +2318,32 @@ static int mirror_split(const char *fname, __u32 id,
                goto close_fd;
        }
 
-       if (victim_file == NULL) {
+again:
+       if (!victim_file) {
                /* 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);
+                       if (last_non_stale_mirror(mirror_id, layout)) {
+                               rc = -EUCLEAN;
+                               fprintf(stderr,
+                                       "%s: cannot destroy the last non-stale mirror of file '%s'\n",
+                                       progname, fname);
+                               goto close_fd;
+                       }
+
+                       if (purge) {
+                               /* don't use volatile file for mirror destroy */
+                               fdv = fd;
+                       } else {
+                               /**
+                                * try the old way to delete mirror using
+                                * volatile file.
+                                */
+                               fdv = llapi_create_volatile_idx(parent,
+                                               mdt_index, O_LOV_DELAY_CREATE);
+                       }
                } else {
                        snprintf(victim, sizeof(victim), "%s.mirror~%u",
-                                fname, id);
+                                fname, mirror_id);
                        fdv = open(victim, flags, S_IRUSR | S_IWUSR);
                }
        } else {
@@ -1886,9 +2378,15 @@ static int mirror_split(const char *fname, __u32 id,
        data->lil_flags = LL_LEASE_LAYOUT_SPLIT;
        data->lil_count = 2;
        data->lil_ids[0] = fdv;
-       data->lil_ids[1] = id;
+       data->lil_ids[1] = mirror_id;
        rc = llapi_lease_set(fd, data);
        if (rc <= 0) {
+               if (rc == -EINVAL && purge) {
+                       /* could be old MDS which prohibit fd==fdv */
+                       purge = false;
+                       goto again;
+
+               }
                if (rc == 0) /* lost lease lock */
                        rc = -EBUSY;
                fprintf(stderr,
@@ -1900,7 +2398,8 @@ static int mirror_split(const char *fname, __u32 id,
        free(data);
 
 close_victim:
-       close(fdv);
+       if (!purge)
+               close(fdv);
 close_fd:
        close(fd);
 free_layout:
@@ -1908,6 +2407,72 @@ free_layout:
        return rc;
 }
 
+static inline
+int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
+                          __u16 *mirror_ids, int ids_nr);
+
+static int lfs_migrate_to_dom(int fd, int fdv, char *name,
+                             __u64 migration_flags,
+                             struct llapi_stripe_param *param,
+                             struct llapi_layout *layout)
+{
+       struct ll_ioc_lease *data = NULL;
+       int rc;
+
+       rc = llapi_lease_acquire(fd, LL_LEASE_RDLCK);
+       if (rc < 0) {
+               error_loc = "cannot get lease";
+               goto out_close;
+       }
+
+       /* Atomically put lease, merge layouts, resync and close. */
+       data = calloc(1, offsetof(typeof(*data), lil_ids[1024]));
+       if (!data) {
+               error_loc = "memory allocation";
+               goto out_close;
+       }
+       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_close;
+       } else if (rc == 0) {
+               rc = -EBUSY;
+               error_loc = "lost lease lock";
+               goto out_close;
+       }
+       close(fd);
+       close(fdv);
+
+       rc = lfs_mirror_resync_file(name, data, NULL, 0);
+       if (rc) {
+               error_loc = "cannot resync file";
+               goto out;
+       }
+
+       /* delete first mirror now */
+       rc = mirror_split(name, 1, NULL, MF_DESTROY, NULL);
+       if (rc < 0)
+               error_loc = "cannot delete old layout";
+       goto out;
+
+out_close:
+       close(fd);
+       close(fdv);
+out:
+       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);
+       if (data)
+               free(data);
+       return rc;
+}
+
 /**
  * Parse a string containing an target index list into an array of integers.
  *
@@ -1915,29 +2480,32 @@ free_layout:
  * 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
+ * \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
+ * \param[in/out] overstriping index list may contain duplicates
  *
  * \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)
+static int parse_targets(__u32 *tgts, int size, int offset, char *arg,
+                        unsigned long long *pattern)
 {
        int rc;
        int nr = offset;
        int slots = size - offset;
        char *ptr = NULL;
+       bool overstriped = false;
        bool end_of_loop;
 
-       if (arg == NULL)
+       if (!arg)
                return -EINVAL;
 
        end_of_loop = false;
        while (!end_of_loop) {
-               int start_index;
-               int end_index;
+               int start_index = 0;
+               int end_index = 0;
                int i;
                char *endptr = NULL;
 
@@ -1948,16 +2516,19 @@ static int parse_targets(__u32 *tgts, int size, int offset, char *arg)
                end_of_loop = *ptr == '\0';
                *ptr = '\0';
 
+               errno = 0;
                start_index = strtol(arg, &endptr, 0);
                if (endptr == arg) /* no data at all */
                        break;
-               if (*endptr != '-' && *endptr != '\0') /* has invalid data */
+               if (errno != 0 || start_index < -1 ||
+                   (*endptr != '-' && *endptr != '\0'))
                        break;
 
                end_index = start_index;
                if (*endptr == '-') {
+                       errno = 0;
                        end_index = strtol(endptr + 1, &endptr, 0);
-                       if (*endptr != '\0')
+                       if (errno != 0 || *endptr != '\0' || end_index < -1)
                                break;
                        if (end_index < start_index)
                                break;
@@ -1968,14 +2539,21 @@ static int parse_targets(__u32 *tgts, int size, int offset, char *arg)
 
                        /* remove duplicate */
                        for (j = 0; j < offset; j++) {
-                               if (tgts[j] == i)
-                                       break;
+                               if (tgts[j] == i && pattern &&
+                                   *pattern == LLAPI_LAYOUT_OVERSTRIPING)
+                                       overstriped = true;
+                               else if (tgts[j] == i)
+                                       return -EINVAL;
                        }
-                       if (j == offset) { /* no duplicate */
+
+                       j = offset;
+
+                       if (j == offset) { /* check complete */
                                tgts[nr++] = i;
                                --slots;
                        }
                }
+
                if (slots == 0 && i < end_index)
                        break;
 
@@ -1984,15 +2562,19 @@ static int parse_targets(__u32 *tgts, int size, int offset, char *arg)
                offset = nr;
                rc = 0;
        }
-       if (!end_of_loop && ptr != NULL)
+       if (!end_of_loop && ptr)
                *ptr = ',';
 
+       if (!overstriped && pattern)
+               *pattern = LLAPI_LAYOUT_DEFAULT;
+
        return rc < 0 ? rc : nr;
 }
 
 struct lfs_setstripe_args {
        unsigned long long       lsa_comp_end;
        unsigned long long       lsa_stripe_size;
+       unsigned long long       lsa_extension_size;
        long long                lsa_stripe_count;
        long long                lsa_stripe_off;
        __u32                    lsa_comp_flags;
@@ -2001,6 +2583,7 @@ struct lfs_setstripe_args {
        unsigned int             lsa_mirror_count;
        int                      lsa_nr_tgts;
        bool                     lsa_first_comp;
+       bool                     lsa_extension_comp;
        __u32                   *lsa_tgts;
        char                    *lsa_pool_name;
 };
@@ -2054,7 +2637,6 @@ static inline bool setstripe_args_specified(struct lfs_setstripe_args *lsa)
                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);
 }
 
@@ -2074,21 +2656,27 @@ static int comp_args_to_layout(struct llapi_layout **composite,
 {
        struct llapi_layout *layout = *composite;
        uint64_t prev_end = 0;
+       uint64_t size;
        int i = 0, rc;
 
-       if (layout == NULL) {
+new_comp:
+       if (!layout) {
                layout = llapi_layout_alloc();
-               if (layout == NULL) {
+               if (!layout) {
                        fprintf(stderr, "Alloc llapi_layout failed. %s\n",
                                strerror(errno));
-                       return -ENOMEM;
+                       errno = ENOMEM;
+                       return -1;
                }
                *composite = layout;
+               lsa->lsa_first_comp = true;
        } else {
                uint64_t start;
 
-               /* Get current component extent, current component
-                * must be the tail component. */
+               /*
+                * 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",
@@ -2096,81 +2684,119 @@ static int comp_args_to_layout(struct llapi_layout **composite,
                        return rc;
                }
 
-               if (lsa->lsa_first_comp)
+               if (lsa->lsa_first_comp) {
                        prev_end = 0;
-
-               if (lsa->lsa_first_comp)
                        rc = llapi_layout_add_first_comp(layout);
-               else
+               } 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;
+
+       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 (set_extent) {
+               uint64_t comp_end = lsa->lsa_comp_end;
+
+               /*
+                * The extendable component is 0-length, so it can be removed
+                * if there is insufficient space to extend it.
+                */
+               if (lsa->lsa_extension_comp)
+                       comp_end = prev_end;
+
                rc = llapi_layout_comp_extent_set(layout, prev_end,
-                                                 lsa->lsa_comp_end);
+                                                 comp_end);
                if (rc) {
-                       fprintf(stderr, "Set extent [%lu, %llu) failed. %s\n",
-                               prev_end, lsa->lsa_comp_end, strerror(errno));
+                       fprintf(stderr, "Set extent [%lu, %lu) failed. %s\n",
+                               prev_end, comp_end, strerror(errno));
                        return rc;
                }
        }
+       /* reset lsa_first_comp */
+       lsa->lsa_first_comp = false;
 
        /* 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. */
+               /*
+                * 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",
+                       fprintf(stderr,
+                               "Option 'stripe-count' can't be specified with Data-on-MDT component: %lld\n",
                                lsa->lsa_stripe_count);
-                       return -EINVAL;
+                       errno = EINVAL;
+                       return -1;
                }
                if (lsa->lsa_stripe_size != LLAPI_LAYOUT_DEFAULT) {
-                       fprintf(stderr, "Option 'stripe-size' can't be "
-                               "specified with Data-on-MDT component: %llu\n",
+                       fprintf(stderr,
+                               "Option 'stripe-size' can't be specified with Data-on-MDT component: %llu\n",
                                lsa->lsa_stripe_size);
-                       return -EINVAL;
+                       errno = EINVAL;
+                       return -1;
                }
                if (lsa->lsa_nr_tgts != 0) {
-                       fprintf(stderr, "Option 'ost-list' can't be specified "
-                               "with Data-on-MDT component: '%i'\n",
+                       fprintf(stderr,
+                               "Option 'ost-list' can't be specified with Data-on-MDT component: '%i'\n",
                                lsa->lsa_nr_tgts);
-                       return -EINVAL;
+                       errno = EINVAL;
+                       return -1;
                }
                if (lsa->lsa_stripe_off != LLAPI_LAYOUT_DEFAULT) {
-                       fprintf(stderr, "Option 'stripe-offset' can't be "
-                               "specified with Data-on-MDT component: %lld\n",
+                       fprintf(stderr,
+                               "Option 'stripe-offset' can't be specified with Data-on-MDT component: %lld\n",
                                lsa->lsa_stripe_off);
-                       return -EINVAL;
+                       errno = EINVAL;
+                       return -1;
                }
                if (lsa->lsa_pool_name != 0) {
-                       fprintf(stderr, "Option 'pool' can't be specified "
-                               "with Data-on-MDT component: '%s'\n",
+                       fprintf(stderr,
+                               "Option 'pool' can't be specified with Data-on-MDT component: '%s'\n",
                                lsa->lsa_pool_name);
-                       return -EINVAL;
+                       errno = EINVAL;
+                       return -1;
                }
 
                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));
+                               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;
+       } else if (lsa->lsa_pattern == LLAPI_LAYOUT_OVERSTRIPING) {
+               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;
+               }
        }
 
-       rc = llapi_layout_stripe_size_set(layout, lsa->lsa_stripe_size);
+       size = lsa->lsa_comp_flags & LCME_FL_EXTENSION ?
+               lsa->lsa_extension_size : lsa->lsa_stripe_size;
+
+       if (lsa->lsa_comp_flags & LCME_FL_EXTENSION)
+               rc = llapi_layout_extension_size_set(layout, size);
+       else
+               rc = llapi_layout_stripe_size_set(layout, size);
+
        if (rc) {
-               fprintf(stderr, "Set stripe size %llu failed: %s\n",
-                       lsa->lsa_stripe_size, strerror(errno));
+               fprintf(stderr, "Set stripe size %lu failed: %s\n",
+                       size, strerror(errno));
                return rc;
        }
 
@@ -2181,14 +2807,7 @@ static int comp_args_to_layout(struct llapi_layout **composite,
                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) {
+       if (lsa->lsa_pool_name) {
                rc = llapi_layout_pool_name_set(layout, lsa->lsa_pool_name);
                if (rc) {
                        fprintf(stderr, "Set pool name: %s failed. %s\n",
@@ -2210,8 +2829,10 @@ static int comp_args_to_layout(struct llapi_layout **composite,
                    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;
+                               lsa->lsa_stripe_count,
+                               lsa->lsa_nr_tgts);
+                       errno = EINVAL;
+                       return -1;
                }
                for (i = 0; i < lsa->lsa_nr_tgts; i++) {
                        rc = llapi_layout_ost_index_set(layout, i,
@@ -2229,7 +2850,14 @@ static int comp_args_to_layout(struct llapi_layout **composite,
                return rc;
        }
 
-       return 0;
+       /* Create the second, virtual component of extension space */
+       if (lsa->lsa_extension_comp) {
+               lsa->lsa_comp_flags |= LCME_FL_EXTENSION;
+               lsa->lsa_extension_comp = false;
+               goto new_comp;
+       }
+
+       return rc;
 }
 
 static int build_component(struct llapi_layout **layout,
@@ -2256,26 +2884,78 @@ static int build_component(struct llapi_layout **layout,
        return rc;
 }
 
+static int build_prev_component(struct llapi_layout **layout,
+                               struct lfs_setstripe_args *prev,
+                               struct lfs_setstripe_args *lsa,
+                               bool set_extent)
+{
+       int extension = lsa->lsa_comp_flags & LCME_FL_EXTENSION;
+       int rc;
+
+       if (prev->lsa_stripe_size) {
+               if (extension) {
+                       prev->lsa_comp_end = lsa->lsa_comp_end;
+                       prev->lsa_extension_size = lsa->lsa_extension_size;
+                       prev->lsa_extension_comp = true;
+               }
+
+               rc = build_component(layout, prev, true);
+               if (rc)
+                       return rc;
+       }
+
+       /*
+        * Copy lsa to previous lsa;
+        * if this is an extension component, make the previous invalid;
+        */
+       if (extension)
+               prev->lsa_stripe_size = 0;
+       else
+               *prev = *lsa;
+
+       return 0;
+}
+
 static int build_layout_from_yaml_node(struct cYAML *node,
                                       struct llapi_layout **layout,
                                       struct lfs_setstripe_args *lsa,
-                                      __u32 *osts)
+                                      struct lfs_setstripe_args *prevp)
 {
+       struct lfs_setstripe_args prev = { 0 };
+       __u32 *osts = lsa->lsa_tgts;
        char *string;
        int rc = 0;
 
+       if (!prevp)
+               prevp = &prev;
+
        while (node) {
+               string = node->cy_string;
+
                if (node->cy_type == CYAML_TYPE_OBJECT) {
                        /* go deep to sub blocks */
+                       if (string && !strncmp(string, "component", 9) &&
+                           strncmp(string, "component0", 10) &&
+                           strncmp(string, "components", 10)) {
+                               rc = build_prev_component(layout, prevp, lsa,
+                                                         true);
+                               if (rc)
+                                       return rc;
+
+                               /* initialize lsa. */
+                               setstripe_args_init(lsa);
+                               lsa->lsa_first_comp = false;
+                               lsa->lsa_tgts = osts;
+                       }
+
                        rc = build_layout_from_yaml_node(node->cy_child, layout,
-                                                        lsa, osts);
+                                                        lsa, prevp);
                        if (rc)
                                return rc;
                } else {
-                       if (node->cy_string == NULL)
+                       if (!node->cy_string)
                                return -EINVAL;
 
-                       string = node->cy_string;
                        /* skip leading lmm_ if present, to simplify parsing */
                        if (strncmp(string, "lmm_", 4) == 0)
                                string += 4;
@@ -2290,13 +2970,18 @@ static int build_layout_from_yaml_node(struct cYAML *node,
                                } else if (!strcmp(string, "pattern")) {
                                        if (!strcmp(node->cy_valuestring, "mdt"))
                                                lsa->lsa_pattern = LLAPI_LAYOUT_MDT;
+                                       if (!strcmp(node->cy_valuestring,
+                                                   "raid0,overstriped"))
+                                               lsa->lsa_pattern =
+                                                       LLAPI_LAYOUT_OVERSTRIPING;
                                } 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
+                                       /*
+                                        * Only template flags have meaning in
                                         * the layout for a new file
                                         */
                                        lsa->lsa_comp_flags &= LCME_TEMPLATE_FLAGS;
@@ -2305,18 +2990,8 @@ static int build_layout_from_yaml_node(struct cYAML *node,
                                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;
@@ -2326,6 +3001,9 @@ static int build_layout_from_yaml_node(struct cYAML *node,
                                        lsa->lsa_stripe_count = node->cy_valueint;
                                } else if (!strcmp(string, "stripe_size")) {
                                        lsa->lsa_stripe_size = node->cy_valueint;
+                               } else if (!strcmp(string, "extension_size")) {
+                                       lsa->lsa_extension_size = node->cy_valueint;
+                                       lsa->lsa_extension_comp = true;
                                } else if (!strcmp(string, "stripe_offset")) {
                                        lsa->lsa_stripe_off = node->cy_valueint;
                                } else if (!strcmp(string, "l_ost_idx")) {
@@ -2337,6 +3015,15 @@ static int build_layout_from_yaml_node(struct cYAML *node,
                node = node->cy_next;
        }
 
+       if (prevp == &prev) {
+               rc = build_prev_component(layout, prevp, lsa, true);
+               if (rc)
+                       return rc;
+
+               if (!(lsa->lsa_comp_flags & LCME_FL_EXTENSION))
+                       rc = build_component(layout, lsa, *layout != NULL);
+       }
+
        return rc;
 }
 
@@ -2364,13 +3051,11 @@ static int lfs_comp_create_from_yaml(char *template,
        setstripe_args_init(lsa);
        lsa->lsa_tgts = osts;
 
-       rc = build_layout_from_yaml_node(tree, layout, lsa, osts);
+       rc = build_layout_from_yaml_node(tree, layout, lsa, NULL);
        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);
@@ -2381,53 +3066,64 @@ err:
        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)
+/**
+ * Get the extension size from the next (SEL) component and extend the
+ * current component on it. The start of the next component is to be
+ * adjusted as well.
+ *
+ * \param[in] layout   the current layout
+ * \param[in] start    the start of the current component
+ * \param[in,out] end  the end of the current component
+ * \param[in] offset   the offset to adjust the end position to instead of
+ *                     extension size
+ *
+ * \retval 0           - extended successfully
+ * \retval < 0         - error
+ */
+static int layout_extend_comp(struct llapi_layout *layout,
+                             uint64_t start, uint64_t *end,
+                             uint64_t offset)
 {
-       struct llapi_layout *head;
-       uint64_t start, end, stripe_size, prev_end = 0;
+       uint64_t size, next_start, next_end;
        int rc;
 
-       if (layout == NULL) {
+       rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_NEXT);
+       if (rc < 0) {
                fprintf(stderr,
-                       "%s setstripe: layout must be specified\n",
-                       progname);
-               return -EINVAL;
+                       "%s setstripe: cannot move component cursor: %s\n",
+                       progname, strerror(errno));
+               return rc;
        }
 
-       errno = 0;
-       head = llapi_layout_get_by_path(fname, 0);
-       if (head == NULL) {
+       /*
+        * Even if the @size will not be used below, this will fail if
+        * this is not a SEL component - a good confirmation we are
+        * working on right components.
+        */
+       rc = llapi_layout_extension_size_get(layout, &size);
+       if (rc < 0) {
                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;
+                       "%s setstripe: cannot get component ext size: %s\n",
+                       progname, strerror(errno));
+               return rc;
        }
 
-       rc = llapi_layout_comp_extent_get(head, &start, &prev_end);
+       rc = llapi_layout_comp_extent_get(layout, &next_start, &next_end);
        if (rc) {
-               fprintf(stderr, "%s setstripe: cannot get prev extent: %s\n",
+               fprintf(stderr, "%s setstripe: cannot get extent: %s\n",
                        progname, strerror(errno));
-               llapi_layout_free(head);
                return rc;
        }
 
-       llapi_layout_free(head);
+       next_start += offset ?: size;
+       rc = llapi_layout_comp_extent_set(layout, next_start, next_end);
+       if (rc) {
+               fprintf(stderr, "%s setstripe: cannot set extent: %s\n",
+                       progname, strerror(errno));
+               return rc;
+       }
 
-       /* Make sure we use the first component of the layout to be added. */
-       rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_FIRST);
+       rc = llapi_layout_comp_use(layout, LLAPI_LAYOUT_COMP_USE_PREV);
        if (rc < 0) {
                fprintf(stderr,
                        "%s setstripe: cannot move component cursor: %s\n",
@@ -2435,32 +3131,107 @@ static int adjust_first_extent(char *fname, struct llapi_layout *layout)
                return rc;
        }
 
-       rc = llapi_layout_comp_extent_get(layout, &start, &end);
+       *end += offset ?: size;
+       rc = llapi_layout_comp_extent_set(layout, start, *end);
        if (rc) {
-               fprintf(stderr, "%s setstripe: cannot get extent: %s\n",
+               fprintf(stderr, "%s setstripe: cannot set extent: %s\n",
                        progname, strerror(errno));
                return rc;
        }
 
-       if (start > prev_end || end <= prev_end) {
+       return 0;
+}
+
+/**
+ * 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.
+ *
+ * In the create mode, we need to check if the first component is an extendable
+ * SEL component and extend its length to the extension size (first component
+ * of the PFL file is initialised at the create time, cannot be 0-lenght.
+ */
+static int layout_adjust_first_extent(char *fname, struct llapi_layout *layout,
+                                     bool comp_add)
+{
+       struct llapi_layout *head;
+       uint64_t start = 0, prev_end = 0;
+       uint64_t end;
+       int rc, ret = 0;
+
+       if (!layout || !(comp_add || llapi_layout_is_composite(layout)))
+               return 0;
+
+       errno = 0;
+       while (comp_add) {
+               head = llapi_layout_get_by_path(fname, 0);
+               if (!head) {
+                       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);
+                       ret = -ENODATA;
+
+                       /*
+                        * the new layout will be added to an empty one, it
+                        * still needs to be adjusted below
+                        */
+                       comp_add = 0;
+                       break;
+               } 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);
+               break;
+       }
+
+       /* 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: first extent [%lu, %lu) not adjacent with extent end %lu\n",
-                       progname, start, end, prev_end);
-               return -EINVAL;
+                       "%s setstripe: cannot move component cursor: %s\n",
+                       progname, strerror(errno));
+               return rc;
        }
 
-       rc = llapi_layout_stripe_size_get(layout, &stripe_size);
+       rc = llapi_layout_comp_extent_get(layout, &start, &end);
        if (rc) {
-               fprintf(stderr, "%s setstripe: cannot get stripe size: %s\n",
+               fprintf(stderr, "%s setstripe: cannot get extent: %s\n",
                        progname, strerror(errno));
                return rc;
        }
 
-       if (stripe_size != LLAPI_LAYOUT_DEFAULT &&
-           (prev_end & (stripe_size - 1))) {
+       if (start == 0 && end == 0) {
+               rc = layout_extend_comp(layout, start, &end,
+                                       comp_add ? prev_end : 0);
+               if (rc)
+                       return rc;
+       }
+
+       if (start > prev_end || end < prev_end) {
                fprintf(stderr,
-                       "%s setstripe: stripe size %lu not aligned with %lu\n",
-                       progname, stripe_size, prev_end);
+                       "%s setstripe: first extent [%lu, %lu) not adjacent with extent end %lu\n",
+                       progname, start, end, prev_end);
                return -EINVAL;
        }
 
@@ -2472,7 +3243,24 @@ static int adjust_first_extent(char *fname, struct llapi_layout *layout)
                return rc;
        }
 
-       return 0;
+       return ret;
+}
+
+static int mirror_adjust_first_extents(struct mirror_args *list)
+{
+       int rc = 0;
+
+       if (!list)
+               return 0;
+
+       while (list) {
+               rc = layout_adjust_first_extent(NULL, list->m_layout, false);
+               if (rc)
+                       break;
+               list = list->m_next;
+       }
+
+       return rc;
 }
 
 static inline bool arg_is_eof(char *arg)
@@ -2494,8 +3282,10 @@ static struct mirror_args *lfs_mirror_alloc(void)
 
        while (1) {
                mirror = calloc(1, sizeof(*mirror));
-               if (mirror != NULL)
+               if (mirror) {
+                       mirror->m_inherit = false;
                        break;
+               }
 
                sleep(1);
        }
@@ -2515,7 +3305,7 @@ static struct mirror_args *lfs_mirror_alloc(void)
  */
 static void lfs_mirror_free(struct mirror_args *mirror)
 {
-       if (mirror->m_layout != NULL)
+       if (mirror->m_layout)
                llapi_layout_free(mirror->m_layout);
        free(mirror);
 }
@@ -2532,7 +3322,7 @@ static void lfs_mirror_list_free(struct mirror_args *mirror_list)
 {
        struct mirror_args *next_mirror = NULL;
 
-       while (mirror_list != NULL) {
+       while (mirror_list) {
                next_mirror = mirror_list->m_next;
                lfs_mirror_free(mirror_list);
                mirror_list = next_mirror;
@@ -2549,11 +3339,14 @@ enum {
        LFS_COMP_ADD_OPT,
        LFS_COMP_NO_VERIFY_OPT,
        LFS_PROJID_OPT,
-       LFS_MIRROR_FLAGS_OPT,
+       LFS_LAYOUT_FLAGS_OPT, /* used for mirror and foreign flags */
        LFS_MIRROR_ID_OPT,
        LFS_MIRROR_STATE_OPT,
        LFS_LAYOUT_COPY,
        LFS_MIRROR_INDEX_OPT,
+       LFS_LAYOUT_FOREIGN_OPT,
+       LFS_MODE_OPT,
+       LFS_NEWERXY_OPT,
 };
 
 /* functions */
@@ -2575,6 +3368,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
        unsigned long long               size_units = 1;
        bool                             migrate_mode = false;
        bool                             migrate_mdt_mode = false;
+       bool                             setstripe_mode = false;
        bool                             migration_block = false;
        __u64                            migration_flags = 0;
        __u32                            tgts[LOV_MAX_STRIPE_COUNT] = { 0 };
@@ -2595,12 +3389,19 @@ static int lfs_setstripe_internal(int argc, char **argv,
        bool from_yaml = false;
        bool from_copy = false;
        char *template = NULL;
+       bool foreign_mode = false;
+       char *xattr = NULL;
+       uint32_t type = LU_FOREIGN_TYPE_NONE, flags = 0;
+       char *mode_opt = NULL;
+       mode_t previous_umask = 0;
+       mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
 
        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 },
+/* find        { .val = 'B',   .name = "btime",        .has_arg = required_argument }*/
        { .val = LFS_COMP_ADD_OPT,
                        .name = "comp-add",     .has_arg = no_argument },
        { .val = LFS_COMP_ADD_OPT,
@@ -2621,16 +3422,21 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                                .has_arg = no_argument},
        { .val = LFS_COMP_NO_VERIFY_OPT,
                        .name = "no-verify",    .has_arg = no_argument},
-       { .val = LFS_MIRROR_FLAGS_OPT,
+       { .val = LFS_LAYOUT_FLAGS_OPT,
                        .name = "flags",        .has_arg = required_argument},
+       { .val = LFS_LAYOUT_FOREIGN_OPT,
+                       .name = "foreign",      .has_arg = optional_argument},
        { .val = LFS_MIRROR_ID_OPT,
                        .name = "mirror-id",    .has_arg = required_argument},
+       { .val = LFS_MODE_OPT,
+                       .name = "mode",         .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 = 'C',   .name = "overstripe-count",
+                                               .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 */
@@ -2648,6 +3454,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
        { .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},
+/* find { .val = 'l',  .name = "lazy",         .has_arg = no_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},
@@ -2673,19 +3480,28 @@ static int lfs_setstripe_internal(int argc, char **argv,
 /* 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 = 'x',   .name = "xattr",        .has_arg = required_argument },
        { .val = 'y',   .name = "yaml",         .has_arg = required_argument },
+       { .val = 'z',   .name = "ext-size",     .has_arg = required_argument},
+       { .val = 'z',   .name = "extension-size", .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);
+       setstripe_mode = (opc == SO_SETSTRIPE);
+       if (opc == SO_MIRROR_DELETE) {
+               delete = 1;
+               mirror_flags = MF_DESTROY;
+       }
 
        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) {
+                               "bc:C:dDE:f:H:i:I:m:N::no:p:L:s:S:vx:y:z:",
+                               long_opts, NULL)) >= 0) {
+               size_units = 1;
                switch (c) {
                case 0:
                        /* Long options. */
@@ -2702,18 +3518,11 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        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",
+                                       "%s: inverted flags are not supported\n",
                                        progname);
-                               result = -EINVAL;
-                               goto error;
+                               goto usage_error;
                        }
-
                        break;
                case LFS_COMP_SET_OPT:
                        comp_set = 1;
@@ -2721,36 +3530,65 @@ static int lfs_setstripe_internal(int argc, char **argv,
                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) {
+               case LFS_MIRROR_ID_OPT: {
+                       unsigned long int id;
+
+                       errno = 0;
+                       id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' || id == 0 ||
+                           id > UINT16_MAX) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                goto usage_error;
                        }
-                       break;
-               case LFS_MIRROR_FLAGS_OPT: {
-                       __u32 flags;
+
+                       mirror_id = (__u16)id;
+                       break;
+               }
+               case LFS_LAYOUT_FLAGS_OPT: {
+                       uint32_t neg_flags;
+
+                       /* check for numeric flags (foreign and mirror cases) */
+                       if (setstripe_mode && !mirror_mode && !last_mirror) {
+                               errno = 0;
+                               flags = strtoul(optarg, &end, 16);
+                               if (errno != 0 || *end != '\0' ||
+                                   flags >= UINT32_MAX) {
+                                       fprintf(stderr,
+                                               "%s %s: invalid hex flags '%s'\n",
+                                               progname, argv[0], optarg);
+                                       return CMD_HELP;
+                               }
+                               if (!foreign_mode) {
+                                       fprintf(stderr,
+                                               "%s %s: hex flags must be specified with --foreign option\n",
+                                               progname, argv[0]);
+                                       return CMD_HELP;
+                               }
+                               break;
+                       }
 
                        if (!mirror_mode || !last_mirror) {
-                               fprintf(stderr, "error: %s: --flags must be specified with --mirror-count|-N option\n",
+                               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);
+                                               &neg_flags);
                        if (result != 0)
                                goto usage_error;
 
-                       if (flags) {
-                               fprintf(stderr, "%s: inverted flags are not supported\n",
+                       if (neg_flags) {
+                               fprintf(stderr,
+                                       "%s: inverted flags are not supported\n",
                                        progname);
                                result = -EINVAL;
                                goto usage_error;
                        }
-                       if (last_mirror->m_flags & ~LCME_USER_FLAGS) {
+                       if (last_mirror->m_flags & ~LCME_USER_MIRROR_FLAGS) {
                                fprintf(stderr,
                                        "%s: unsupported mirror flags: %s\n",
                                        progname, optarg);
@@ -2759,6 +3597,42 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        }
                        break;
                }
+               case LFS_LAYOUT_FOREIGN_OPT:
+                       if (optarg) {
+                               /* check pure numeric */
+                               type = strtoul(optarg, &end, 0);
+                               if (*end) {
+                                       /* check name */
+                                       type = check_foreign_type_name(optarg);
+                                       if (type == LU_FOREIGN_TYPE_UNKNOWN) {
+                                               fprintf(stderr,
+                                                       "%s %s: unrecognized foreign type '%s'\n",
+                                                       progname, argv[0],
+                                                       optarg);
+                                               return CMD_HELP;
+                                       }
+                               } else if (type >= UINT32_MAX) {
+                                       fprintf(stderr,
+                                               "%s %s: invalid foreign type '%s'\n",
+                                               progname, argv[0], optarg);
+                                       return CMD_HELP;
+                               }
+                       }
+                       foreign_mode = true;
+                       break;
+               case LFS_MODE_OPT:
+                       mode_opt = optarg;
+                       if (mode_opt) {
+                               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_umask = umask(0);
+                       }
+                       break;
                case LFS_LAYOUT_COPY:
                        from_copy = true;
                        template = optarg;
@@ -2772,9 +3646,21 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        }
                        migration_block = true;
                        break;
+               case 'C':
+                       if (lsa.lsa_pattern == LLAPI_LAYOUT_MDT) {
+                               fprintf(stderr,
+                                       "%s %s: -C|--overstripe-count incompatible with DoM layout\n",
+                                       progname, argv[0]);
+                               goto usage_error;
+                       }
+                       lsa.lsa_pattern = LLAPI_LAYOUT_OVERSTRIPING;
+                       /* fall through */
                case 'c':
+                       errno = 0;
                        lsa.lsa_stripe_count = strtoul(optarg, &end, 0);
-                       if (*end != '\0') {
+                       if (errno != 0 || *end != '\0'||
+                           lsa.lsa_stripe_count < -1 ||
+                           lsa.lsa_stripe_count > LOV_MAX_STRIPE_COUNT) {
                                fprintf(stderr,
                                        "%s %s: invalid stripe count '%s'\n",
                                        progname, argv[0], optarg);
@@ -2800,8 +3686,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                case 'D':
                        if (!migrate_mode) {
                                fprintf(stderr,
-                                       "%s %s: -D|--non-direct is valid "
-                                       "only for migrate command\n",
+                                       "%s %s: -D|--non-direct is valid only for migrate command\n",
                                        progname, argv[0]);
                                goto usage_error;
                        }
@@ -2811,9 +3696,8 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        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]);
+                                       fprintf(stderr, "%s: invalid layout\n",
+                                               progname);
                                        goto usage_error;
                                }
 
@@ -2824,9 +3708,13 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                lsa.lsa_comp_end = LUSTRE_EOF;
                        } else {
                                result = llapi_parse_size(optarg,
-                                                       &lsa.lsa_comp_end,
-                                                       &size_units, 0);
-                               if (result) {
+                                                         &lsa.lsa_comp_end,
+                                                         &size_units, 0);
+                               /* assume units of KB if too small */
+                               if (lsa.lsa_comp_end < 4096)
+                                       lsa.lsa_comp_end *= 1024;
+                               if (result ||
+                                   lsa.lsa_comp_end & (LOV_MIN_STRIPE_SIZE - 1)) {
                                        fprintf(stderr,
                                                "%s %s: invalid component end '%s'\n",
                                                progname, argv[0], optarg);
@@ -2836,7 +3724,8 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        break;
                case 'H':
                        if (!migrate_mode) {
-                               fprintf(stderr, "--mdt-hash is valid only for migrate command\n");
+                               fprintf(stderr,
+                                       "--mdt-hash is valid only for migrate command\n");
                                return CMD_HELP;
                        }
 
@@ -2849,8 +3738,11 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        }
                        break;
                case 'i':
+                       errno = 0;
                        lsa.lsa_stripe_off = strtol(optarg, &end, 0);
-                       if (*end != '\0') {
+                       if (errno != 0 || *end != '\0' ||
+                           lsa.lsa_stripe_off < -1 ||
+                           lsa.lsa_stripe_off > LOV_V1_INSANE_STRIPE_COUNT) {
                                fprintf(stderr,
                                        "%s %s: invalid stripe offset '%s'\n",
                                        progname, argv[0], optarg);
@@ -2877,7 +3769,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                goto usage_error;
                        }
                        if (opc == SO_MIRROR_EXTEND) {
-                               if (last_mirror == NULL) {
+                               if (!last_mirror) {
                                        fprintf(stderr,
                                "error: %s: '-N' must exist in front of '%s'\n",
                                                progname, argv[optopt + 1]);
@@ -2887,7 +3779,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                last_mirror->m_count = 1;
                        } else {
                                /* mirror split */
-                               if (mirror_list == NULL)
+                               if (!mirror_list)
                                        mirror_list = lfs_mirror_alloc();
                                mirror_list->m_file = optarg;
                        }
@@ -2896,24 +3788,24 @@ static int lfs_setstripe_internal(int argc, char **argv,
                case 'L':
                        if (strcmp(argv[optind - 1], "mdt") == 0) {
                                /* Can be only the first component */
-                               if (layout != NULL) {
+                               if (layout) {
                                        result = -EINVAL;
-                                       fprintf(stderr, "error: 'mdt' layout "
-                                               "can be only the first one\n");
+                                       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");
+                                       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]);
+                               fprintf(stderr,
+                                       "error: layout '%s' is unknown, supported layouts are: 'mdt', 'raid0'\n",
+                                       argv[optind]);
                                goto error;
                        }
                        break;
@@ -2927,7 +3819,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        migrate_mdt_mode = true;
                        lsa.lsa_nr_tgts = parse_targets(tgts,
                                                sizeof(tgts) / sizeof(__u32),
-                                               lsa.lsa_nr_tgts, optarg);
+                                               lsa.lsa_nr_tgts, optarg, NULL);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid MDT target(s) '%s'\n",
@@ -2954,9 +3846,12 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                mirror_mode = true;
                        }
                        mirror_count = 1;
-                       if (optarg != NULL) {
+                       if (optarg) {
+                               errno = 0;
                                mirror_count = strtoul(optarg, &end, 0);
-                               if (*end != '\0' || mirror_count == 0) {
+                               if (errno != 0 || *end != '\0' ||
+                                   mirror_count == 0 ||
+                                   mirror_count > LUSTRE_MIRROR_COUNT_MAX) {
                                        fprintf(stderr,
                                                "error: %s: bad mirror count: %s\n",
                                                progname, optarg);
@@ -2968,11 +3863,13 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        new_mirror = lfs_mirror_alloc();
                        new_mirror->m_count = mirror_count;
 
-                       if (mirror_list == NULL)
+                       if (!mirror_list)
                                mirror_list = new_mirror;
 
-                       if (last_mirror != NULL) {
+                       if (last_mirror) {
                                /* wrap up last mirror */
+                               if (!setstripe_args_specified(&lsa))
+                                       last_mirror->m_inherit = true;
                                if (lsa.lsa_comp_end == 0)
                                        lsa.lsa_comp_end = LUSTRE_EOF;
 
@@ -2993,12 +3890,25 @@ static int lfs_setstripe_internal(int argc, char **argv,
                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");
+                               fprintf(stderr,
+                                       "warning: '--ost-list' is deprecated, use '--ost' instead\n");
 #endif
+                       if (lsa.lsa_pattern == LLAPI_LAYOUT_MDT) {
+                               fprintf(stderr,
+                                       "%s %s: -o|--ost incompatible with DoM layout\n",
+                                       progname, argv[0]);
+                               goto usage_error;
+                       }
+                       /*
+                        * -o allows overstriping, and must note it because
+                        * parse_targets is shared with MDT striping, which
+                        * does not allow duplicates
+                        */
+                       lsa.lsa_pattern = LLAPI_LAYOUT_OVERSTRIPING;
                        lsa.lsa_nr_tgts = parse_targets(tgts,
                                                sizeof(tgts) / sizeof(__u32),
-                                               lsa.lsa_nr_tgts, optarg);
+                                               lsa.lsa_nr_tgts, optarg,
+                                               &lsa.lsa_pattern);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid OST target(s) '%s'\n",
@@ -3011,7 +3921,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                lsa.lsa_stripe_off = tgts[0];
                        break;
                case 'p':
-                       if (optarg == NULL)
+                       if (!optarg)
                                goto usage_error;
                        lsa.lsa_pool_name = optarg;
 
@@ -3023,7 +3933,11 @@ static int lfs_setstripe_internal(int argc, char **argv,
                case 'S':
                        result = llapi_parse_size(optarg, &lsa.lsa_stripe_size,
                                                  &size_units, 0);
-                       if (result) {
+                       /* assume units of KB if too small to be valid */
+                       if (lsa.lsa_stripe_size < 4096)
+                               lsa.lsa_stripe_size *= 1024;
+                       if (result ||
+                           lsa.lsa_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
                                fprintf(stderr,
                                        "%s %s: invalid stripe size '%s'\n",
                                        progname, argv[0], optarg);
@@ -3040,10 +3954,26 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        migrate_mdt_param.fp_verbose = VERBOSE_DETAIL;
                        migration_flags = MIGRATION_VERBOSE;
                        break;
+               case 'x':
+                       xattr = optarg;
+                       break;
                case 'y':
                        from_yaml = true;
                        template = optarg;
                        break;
+               case 'z':
+                       result = llapi_parse_size(optarg,
+                                                 &lsa.lsa_extension_size,
+                                                 &size_units, 0);
+                       if (result) {
+                               fprintf(stderr,
+                                       "%s %s: invalid extension size '%s'\n",
+                                       progname, argv[0], optarg);
+                               goto usage_error;
+                       }
+
+                       lsa.lsa_extension_comp = true;
+                       break;
                default:
                        fprintf(stderr, "%s %s: unrecognized option '%s'\n",
                                progname, argv[0], argv[optind - 1]);
@@ -3059,6 +3989,35 @@ static int lfs_setstripe_internal(int argc, char **argv,
                goto usage_error;
        }
 
+       /* lfs migrate $filename should keep the file's layout by default */
+       if (migrate_mode && !setstripe_args_specified(&lsa) && !layout &&
+           !from_yaml)
+               from_copy = true;
+
+       if (xattr && !foreign_mode) {
+               /*
+                * only print a warning as this is harmless and will be ignored
+                */
+               fprintf(stderr,
+                       "%s %s: xattr has been specified for non-foreign layout\n",
+                       progname, argv[0]);
+       } else if (foreign_mode && !xattr) {
+               fprintf(stderr,
+                       "%s %s: xattr must be provided in foreign mode\n",
+                       progname, argv[0]);
+               goto usage_error;
+       }
+
+       if (foreign_mode && (!setstripe_mode || comp_add | comp_del ||
+           comp_set || comp_id || delete || from_copy ||
+           setstripe_args_specified(&lsa) || lsa.lsa_nr_tgts ||
+           lsa.lsa_tgts)) {
+               fprintf(stderr,
+                       "%s %s: only --xattr/--flags/--mode options are valid with --foreign\n",
+                       progname, argv[0]);
+               return CMD_HELP;
+       }
+
        if (mirror_mode && mirror_count == 0) {
                fprintf(stderr,
                        "error: %s: --mirror-count|-N option is required\n",
@@ -3068,14 +4027,20 @@ static int lfs_setstripe_internal(int argc, char **argv,
        }
 
        if (mirror_mode) {
+               if (!setstripe_args_specified(&lsa))
+                       last_mirror->m_inherit = true;
                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)
+               if (result) {
+                       fprintf(stderr, "error: %s: invalid layout\n",
+                               progname);
+                       result = -EINVAL;
                        goto error;
+               }
        }
 
        if (mirror_flags & MF_NO_VERIFY) {
@@ -3094,11 +4059,9 @@ static int lfs_setstripe_internal(int argc, char **argv,
                }
        }
 
-       /* 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",
+       if (comp_set && !comp_id && !lsa.lsa_pool_name) {
+               fprintf(stderr,
+                       "%s %s: --component-set doesn't have component-id set\n",
                        progname, argv[0]);
                goto usage_error;
        }
@@ -3145,26 +4108,20 @@ static int lfs_setstripe_internal(int argc, char **argv,
                }
 
                if (mirror_mode) {
-                       fprintf(stderr, "error: %s: can't use --component-add "
-                               "or --component-del for mirror operation\n",
+                       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) {
+               if (!layout) {
                        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) {
@@ -3176,8 +4133,8 @@ static int lfs_setstripe_internal(int argc, char **argv,
 
        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",
+               fprintf(stderr,
+                       "error: %s: can't specify --yaml or --copy with -c, -S, -i, -o, -p or -E options.\n",
                        argv[0]);
                goto error;
        }
@@ -3189,11 +4146,11 @@ static int lfs_setstripe_internal(int argc, char **argv,
                goto usage_error;
        }
 
-       if (!comp_del && !comp_set && (opc != SO_MIRROR_SPLIT) &&
-           comp_id != 0) {
+       if (!comp_del && !comp_set && opc != SO_MIRROR_SPLIT &&
+           opc != SO_MIRROR_DELETE && 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]);
+                       "%s: option -I can only be used with --component-del or --component-set or lfs mirror split\n",
+                       progname);
                goto usage_error;
        }
 
@@ -3223,10 +4180,12 @@ static int lfs_setstripe_internal(int argc, char **argv,
                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)
+                       lmu->lum_hash_type = LMV_HASH_TYPE_UNKNOWN;
+               if (lsa.lsa_pool_name) {
                        strncpy(lmu->lum_pool_name, lsa.lsa_pool_name,
-                               sizeof(lmu->lum_pool_name));
+                               sizeof(lmu->lum_pool_name) - 1);
+                       lmu->lum_pool_name[sizeof(lmu->lum_pool_name) - 1] = 0;
+               }
                if (lsa.lsa_nr_tgts > 1) {
                        int i;
 
@@ -3236,7 +4195,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                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);
+                                       lsa.lsa_nr_tgts);
                                free(lmu);
                                goto usage_error;
                        }
@@ -3251,11 +4210,11 @@ static int lfs_setstripe_internal(int argc, char **argv,
 
                migrate_mdt_param.fp_lmv_md = lmu;
                migrate_mdt_param.fp_migrate = 1;
-       } else if (layout == NULL) {
+       } else if (!layout) {
                /* initialize stripe parameters */
                param = calloc(1, offsetof(typeof(*param),
                               lsp_osts[lsa.lsa_nr_tgts]));
-               if (param == NULL) {
+               if (!param) {
                        fprintf(stderr,
                                "%s %s: cannot allocate memory for parameters: %s\n",
                                progname, argv[0], strerror(ENOMEM));
@@ -3275,6 +4234,14 @@ static int lfs_setstripe_internal(int argc, char **argv,
                        param->lsp_stripe_offset = -1;
                else
                        param->lsp_stripe_offset = lsa.lsa_stripe_off;
+               param->lsp_stripe_pattern =
+                               llapi_pattern_to_lov(lsa.lsa_pattern);
+               if (param->lsp_stripe_pattern == EINVAL) {
+                       fprintf(stderr, "error: %s: invalid stripe pattern\n",
+                               argv[0]);
+                       free(param);
+                       goto usage_error;
+               }
                param->lsp_pool = lsa.lsa_pool_name;
                param->lsp_is_specific = false;
                if (lsa.lsa_nr_tgts > 0) {
@@ -3282,9 +4249,9 @@ static int lfs_setstripe_internal(int argc, char **argv,
                            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,
+                               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;
@@ -3302,22 +4269,41 @@ static int lfs_setstripe_internal(int argc, char **argv,
                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",
+                       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);
+       }
+
+       if (layout != NULL || mirror_list != NULL) {
+               if (mirror_list)
+                       result = mirror_adjust_first_extents(mirror_list);
+               else
+                       result = layout_adjust_first_extent(fname, layout,
+                                                           comp_add);
+               if (result == -ENODATA)
+                       comp_add = 0;
+               else if (result != 0) {
+                       fprintf(stderr, "error: %s: invalid layout\n",
+                               progname);
                        goto error;
                }
        }
 
        for (fname = argv[optind]; fname != NULL; fname = argv[++optind]) {
+               if (from_copy) {
+                       layout = llapi_layout_get_by_path(template ?: fname, 0);
+                       if (!layout) {
+                               fprintf(stderr,
+                                       "%s: can't create composite layout from file %s: %s\n",
+                                       progname, template ?: fname,
+                                       strerror(errno));
+                               result = -errno;
+                               goto error;
+                       }
+               }
+
                if (migrate_mdt_mode) {
                        result = llapi_migrate_mdt(fname, &migrate_mdt_param);
                } else if (migrate_mode) {
@@ -3325,6 +4311,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                                             layout);
                } else if (comp_set != 0) {
                        result = lfs_component_set(fname, comp_id,
+                                                  lsa.lsa_pool_name,
                                                   lsa.lsa_comp_flags,
                                                   lsa.lsa_comp_neg_flags);
                } else if (comp_del != 0) {
@@ -3338,23 +4325,39 @@ static int lfs_setstripe_internal(int argc, char **argv,
                } 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) {
+               } else if (opc == SO_MIRROR_SPLIT || opc == SO_MIRROR_DELETE) {
+                       if (!mirror_id && !comp_id && !lsa.lsa_pool_name) {
                                fprintf(stderr,
-                       "%s %s: no mirror id or component id is specified\n",
-                                       progname, argv[0]);
+                                       "%s: no mirror specified to delete from '%s'\n",
+                                       progname, fname);
                                goto usage_error;
                        }
-                       if (mirror_id != 0)
+                       if (lsa.lsa_pool_name)
+                               mirror_flags |= MF_COMP_POOL;
+                       else if (mirror_id != 0)
                                comp_id = mirror_id;
                        else
                                mirror_flags |= MF_COMP_ID;
-                       result = mirror_split(fname, comp_id, mirror_flags,
+                       if (has_m_file && !strcmp(fname, mirror_list->m_file)) {
+                               fprintf(stderr,
+                                       "%s: the file specified by -f cannot be same as the source file '%s'\n",
+                                       progname, fname);
+                               goto usage_error;
+                       }
+                       result = mirror_split(fname, comp_id, lsa.lsa_pool_name,
+                                             mirror_flags,
                                              has_m_file ? mirror_list->m_file :
                                              NULL);
-               } else if (layout != NULL) {
+               } else if (layout) {
                        result = lfs_component_create(fname, O_CREAT | O_WRONLY,
-                                                     0666, layout);
+                                                     mode, layout);
+                       if (result >= 0) {
+                               close(result);
+                               result = 0;
+                       }
+               } else if (foreign_mode) {
+                       result = llapi_file_create_foreign(fname, mode, type,
+                                                          flags, xattr);
                        if (result >= 0) {
                                close(result);
                                result = 0;
@@ -3362,7 +4365,7 @@ static int lfs_setstripe_internal(int argc, char **argv,
                } else {
                        result = llapi_file_open_param(fname,
                                                       O_CREAT | O_WRONLY,
-                                                      0666, param);
+                                                      mode, param);
                        if (result >= 0) {
                                close(result);
                                result = 0;
@@ -3376,6 +4379,9 @@ static int lfs_setstripe_internal(int argc, char **argv,
                }
        }
 
+       if (mode_opt)
+               umask(previous_umask);
+
        free(param);
        free(migrate_mdt_param.fp_lmv_md);
        llapi_layout_free(layout);
@@ -3391,44 +4397,90 @@ error:
 
 static int lfs_poollist(int argc, char **argv)
 {
-        if (argc != 2)
-                return CMD_HELP;
+       if (argc != 2)
+               return CMD_HELP;
 
-        return llapi_poollist(argv[1]);
+       return llapi_poollist(argv[1]);
 }
 
-static int set_time(time_t *time, time_t *set, char *str)
+#define FP_DEFAULT_TIME_MARGIN (24 * 60 * 60)
+static time_t set_time(struct find_param *param, time_t *time, time_t *set,
+                      char *str)
 {
-       time_t t;
-       int res = 0;
-       char *endptr;
+       long long t = 0;
+       int sign = 0;
+       char *endptr = "AD";
+       char *timebuf;
 
        if (str[0] == '+')
-               res = 1;
+               sign = 1;
        else if (str[0] == '-')
-               res = -1;
+               sign = -1;
 
-       if (res)
+       if (sign)
                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;
+       for (timebuf = str; *endptr && *(endptr + 1); timebuf = endptr + 1) {
+               long long val = strtoll(timebuf, &endptr, 0);
+               int unit = 1;
+
+               switch (*endptr) {
+               case  'y':
+                       unit *= 52; /* 52 weeks + 1 day below */
+               case  'w':      /* fallthrough */
+                       unit *= 7;
+                       if (param->fp_time_margin == FP_DEFAULT_TIME_MARGIN)
+                               param->fp_time_margin *= (1 + unit / 52);
+                       unit += (*endptr == 'y'); /* +1 day for 365 days/year */
+               case '\0': /* days are default unit if none used */
+               case  'd':      /* fallthrough */
+                       unit *= 24;
+               case  'h':      /* fallthrough */
+                       unit *= 60;
+               case  'm':      /* fallthrough */
+                       unit *= 60;
+               case  's':      /* fallthrough */
+                       break;
+                       /* don't need to multiply by 1 for seconds */
+               default:
+                       fprintf(stderr,
+                               "%s find: bad time string '%s': %s\n",
+                               progname, timebuf, strerror(EINVAL));
+                       return LONG_MAX;
+               }
+
+               if (param->fp_time_margin == 0 ||
+                   (*endptr && unit < param->fp_time_margin))
+                       param->fp_time_margin = unit;
+
+               t += val * unit;
        }
-       if (*time < t * 24 * 60 * 60) {
-               if (res != 0)
+       if (*time < t) {
+               if (sign != 0)
                        str--;
-               fprintf(stderr,
-                       "%s find: bad time '%s': too large\n",
+               fprintf(stderr, "%s find: bad time '%s': too large\n",
                        progname, str);
-               return INT_MAX;
+               return LONG_MAX;
        }
 
-       *set = *time - t * 24 * 60 * 60;
-       return res;
+       *set = *time - t;
+
+       return sign;
+}
+
+static int str2quotaid(__u32 *id, const char *arg)
+{
+       unsigned long int projid_tmp = 0;
+       char *endptr = NULL;
+
+       projid_tmp = strtoul(arg, &endptr, 10);
+       if (*endptr != '\0')
+               return -EINVAL;
+       if (projid_tmp >= UINT32_MAX)
+               return -ERANGE;
+
+       *id = projid_tmp;
+       return 0;
 }
 
 static int name2uid(unsigned int *id, const char *name)
@@ -3436,7 +4488,7 @@ static int name2uid(unsigned int *id, const char *name)
        struct passwd *passwd;
 
        passwd = getpwnam(name);
-       if (passwd == NULL)
+       if (!passwd)
                return -ENOENT;
        *id = passwd->pw_uid;
 
@@ -3448,7 +4500,7 @@ static int name2gid(unsigned int *id, const char *name)
        struct group *group;
 
        group = getgrnam(name);
-       if (group == NULL)
+       if (!group)
                return -ENOENT;
        *id = group->gr_gid;
 
@@ -3465,7 +4517,7 @@ static int uid2name(char **name, unsigned int id)
        struct passwd *passwd;
 
        passwd = getpwuid(id);
-       if (passwd == NULL)
+       if (!passwd)
                return -ENOENT;
        *name = passwd->pw_name;
 
@@ -3477,7 +4529,7 @@ static inline int gid2name(char **name, unsigned int id)
        struct group *group;
 
        group = getgrgid(id);
-       if (group == NULL)
+       if (!group)
                return -ENOENT;
        *name = group->gr_name;
 
@@ -3491,7 +4543,7 @@ static int name2layout(__u32 *layout, char *name)
        *layout = 0;
        for (ptr = name; ; ptr = NULL) {
                layout_name = strtok(ptr, ",");
-               if (layout_name == NULL)
+               if (!layout_name)
                        break;
                if (strcmp(layout_name, "released") == 0)
                        *layout |= LOV_PATTERN_F_RELEASED;
@@ -3499,6 +4551,8 @@ static int name2layout(__u32 *layout, char *name)
                        *layout |= LOV_PATTERN_RAID0;
                else if (strcmp(layout_name, "mdt") == 0)
                        *layout |= LOV_PATTERN_MDT;
+               else if (strcmp(layout_name, "overstriping") == 0)
+                       *layout |= LOV_PATTERN_OVERSTRIPING;
                else
                        return -1;
        }
@@ -3513,10 +4567,13 @@ static int lfs_find(int argc, char **argv)
        struct find_param param = {
                .fp_max_depth = -1,
                .fp_quiet = 1,
+               .fp_time_margin = FP_DEFAULT_TIME_MARGIN,
        };
-        struct option long_opts[] = {
+       struct option long_opts[] = {
        { .val = 'A',   .name = "atime",        .has_arg = required_argument },
        { .val = 'b',   .name = "blocks",       .has_arg = required_argument },
+       { .val = 'B',   .name = "btime",        .has_arg = required_argument },
+       { .val = 'B',   .name = "Btime",        .has_arg = required_argument },
        { .val = LFS_COMP_COUNT_OPT,
                        .name = "comp-count",   .has_arg = required_argument },
        { .val = LFS_COMP_COUNT_OPT,
@@ -3534,6 +4591,58 @@ static int lfs_find(int argc, char **argv)
                                                .has_arg = required_argument },
        { .val = LFS_MIRROR_STATE_OPT,
                        .name = "mirror-state", .has_arg = required_argument },
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newer",        .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "neweraa",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "neweram",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerac",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerab",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerma",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newermm",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newermc",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newermb",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerca",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newercm",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newercc",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newercb",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerba",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerbm",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerbc",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerbb",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerBa",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerBm",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerBc",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerBB",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerat",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newermt",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerct",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerbt",      .has_arg = required_argument},
+       { .val = LFS_NEWERXY_OPT,
+                       .name = "newerBt",      .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 },
@@ -3543,12 +4652,15 @@ static int lfs_find(int argc, char **argv)
        { .val = 'E',   .name = "component-end",
                                                .has_arg = required_argument },
 /* find        { .val = 'F',   .name = "fid",          .has_arg = no_argument }, */
+       { .val = LFS_LAYOUT_FOREIGN_OPT,
+                       .name = "foreign",      .has_arg = optional_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 = "lazy",         .has_arg = no_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 },
@@ -3576,61 +4688,75 @@ static int lfs_find(int argc, char **argv)
        { .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 },
+       { .val = 'z',   .name = "extension-size",
+                                               .has_arg = required_argument },
+       { .val = 'z',   .name = "ext-size",     .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;
+       int optidx = 0;
+       int pathstart = -1;
+       int pathend = -1;
+       int pathbad = -1;
+       int neg_opt = 0;
+       time_t *xtime;
+       int *xsign;
+       int isoption;
+       char *endptr;
 
-        time(&t);
+       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;
+               "-0A:b:B:c:C:D:E:g:G:H:i:L:m:M:n:N:O:Ppqrs:S:t:T:u:U:vz:",
+               long_opts, &optidx)) >= 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 'B' for btime */
+               case 'B':
+                       if (c == 'B') {
+                               xtime = &param.fp_btime;
+                               xsign = &param.fp_bsign;
+                               param.fp_exclude_btime = !!neg_opt;
+                       }
                        /* no break, this falls through to 'C' for ctime */
                case 'C':
                        if (c == 'C') {
@@ -3645,8 +4771,8 @@ static int lfs_find(int argc, char **argv)
                                xsign = &param.fp_msign;
                                param.fp_exclude_mtime = !!neg_opt;
                        }
-                       rc = set_time(&t, xtime, optarg);
-                       if (rc == INT_MAX) {
+                       rc = set_time(&param, &t, xtime, optarg);
+                       if (rc == LONG_MAX) {
                                ret = -1;
                                goto err;
                        }
@@ -3682,10 +4808,13 @@ static int lfs_find(int argc, char **argv)
                                optarg++;
                        }
 
+                       errno = 0;
                        param.fp_comp_count = strtoul(optarg, &endptr, 0);
-                       if (*endptr != '\0') {
-                               fprintf(stderr, "error: bad component count "
-                                       "'%s'\n", optarg);
+                       if (errno != 0 || *endptr != '\0' ||
+                           param.fp_comp_count > UINT32_MAX) {
+                               fprintf(stderr,
+                                       "error: bad component count '%s'\n",
+                                       optarg);
                                goto err;
                        }
                        param.fp_check_comp_count = 1;
@@ -3695,13 +4824,15 @@ static int lfs_find(int argc, char **argv)
                        rc = comp_str2flags(optarg, &param.fp_comp_flags,
                                            &param.fp_comp_neg_flags);
                        if (rc) {
-                               fprintf(stderr, "error: bad component flags "
-                                       "'%s'\n", optarg);
+                               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;
                        }
@@ -3718,8 +4849,9 @@ static int lfs_find(int argc, char **argv)
                        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);
+                               fprintf(stderr,
+                                       "error: bad component start '%s'\n",
+                                       optarg);
                                goto err;
                        }
                        param.fp_check_comp_start = 1;
@@ -3737,32 +4869,44 @@ static int lfs_find(int argc, char **argv)
                        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] == '+') {
+               case 'c':
+                       if (optarg[0] == '+') {
                                param.fp_stripe_count_sign = -1;
-                                optarg++;
-                        } else if (optarg[0] == '-') {
+                               optarg++;
+                       } else if (optarg[0] == '-') {
                                param.fp_stripe_count_sign =  1;
-                                optarg++;
-                        }
+                               optarg++;
+                       }
 
+                       errno = 0;
                        param.fp_stripe_count = strtoul(optarg, &endptr, 0);
-                        if (*endptr != '\0') {
-                                fprintf(stderr,"error: bad stripe_count '%s'\n",
-                                        optarg);
-                                ret = -1;
-                                goto err;
-                        }
+                       if (errno != 0 || *endptr != '\0' ||
+                           param.fp_stripe_count > LOV_MAX_STRIPE_COUNT) {
+                               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;
+                       break;
                case 'D':
+                       errno = 0;
                        param.fp_max_depth = strtol(optarg, 0, 0);
+                       if (errno != 0 || param.fp_max_depth < 0) {
+                               fprintf(stderr,
+                                       "error: bad maxdepth '%s'\n",
+                                       optarg);
+                               ret = -1;
+                               goto err;
+                       }
                        break;
                case 'E':
                        if (optarg[0] == '+') {
@@ -3781,41 +4925,224 @@ static int lfs_find(int argc, char **argv)
                                rc = llapi_parse_size(optarg,
                                                &param.fp_comp_end,
                                                &param.fp_comp_end_units, 0);
+                               /* assume units of KB if too small */
+                               if (param.fp_comp_end < 4096)
+                                       param.fp_comp_end *= 1024;
                        }
                        if (rc) {
-                               fprintf(stderr, "error: bad component end "
-                                       "'%s'\n", optarg);
+                               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 LFS_LAYOUT_FOREIGN_OPT: {
+                       /* all types by default */
+                       uint32_t type = LU_FOREIGN_TYPE_UNKNOWN;
+
+                       if (optarg) {
+                               /* check pure numeric */
+                               type = strtoul(optarg, &endptr, 0);
+                               if (*endptr) {
+                                       /* check name */
+                                       type = check_foreign_type_name(optarg);
+                                       if (type == LU_FOREIGN_TYPE_UNKNOWN) {
+                                               fprintf(stderr,
+                                                       "%s %s: unknown foreign type '%s'\n",
+                                                       progname, argv[0],
+                                                       optarg);
+                                               return CMD_HELP;
+                                       }
+                               } else if (type >= UINT32_MAX) {
+                                       fprintf(stderr,
+                                               "%s %s: invalid foreign type '%s'\n",
+                                               progname, argv[0], optarg);
+                                       return CMD_HELP;
+                               }
+                       }
+                       param.fp_foreign_type = type;
+                       param.fp_check_foreign = 1;
+                       param.fp_exclude_foreign = !!neg_opt;
+                       break;
+               }
+               case LFS_NEWERXY_OPT: {
+                       char x = 'm';
+                       char y = 'm';
+                       int xidx;
+                       int negidx;
+                       time_t *newery;
+                       time_t ref = time(NULL);
+
+                       /* no need to check bad options, they won't get here */
+                       if (strlen(long_opts[optidx].name) == 7) {
+                               x = long_opts[optidx].name[5];
+                               y = long_opts[optidx].name[6];
+                       }
+
+                       if (y == 't') {
+                               static const char *const fmts[] = {
+                                       "%Y-%m-%d %H:%M:%S",
+                                       "%Y-%m-%d %H:%M",
+                                       "%Y-%m-%d",
+                                       "%H:%M:%S", /* sometime today */
+                                       "%H:%M",
+                                       "@%s",
+                                       "%s",
+                                       NULL };
+                               struct tm tm;
+                               bool found = false;
+                               int i;
+
+                               for (i = 0; fmts[i] != NULL; i++) {
+                                       char *ptr;
+
+                                       /* Init for times relative to today */
+                                       if (strncmp(fmts[i], "%H", 2) == 0)
+                                               localtime_r(&ref, &tm);
+                                       else
+                                               memset(&tm, 0, sizeof(tm));
+                                       ptr = strptime(optarg, fmts[i], &tm);
+                                       /* Skip spaces */
+                                       while (ptr && isspace(*ptr))
+                                               ptr++;
+                                       if (ptr == optarg + strlen(optarg)) {
+                                               found = true;
+                                               break;
+                                       }
+                               }
+
+                               if (!found) {
+                                       fprintf(stderr,
+                                               "%s: invalid time '%s'\n",
+                                               progname, optarg);
+                                       fprintf(stderr,
+                                               "supported formats are:\n  ");
+                                       for (i = 0; fmts[i] != NULL; i++)
+                                               fprintf(stderr, "'%s', ",
+                                                       fmts[i]);
+                                       fprintf(stderr, "\n");
+                                       ret = -EINVAL;
+                                       goto err;
+                               }
+
+                               ref = mktime(&tm);
+                       } else if (y == 'b' || y == 'B') {
+                               lstatx_t stx;
+
+                               rc = llapi_get_lum_file(optarg, NULL, &stx,
+                                                       NULL, 0);
+                               if (rc || !(stx.stx_mask & STATX_BTIME)) {
+                                       if (!(stx.stx_mask & STATX_BTIME))
+                                               ret = -EOPNOTSUPP;
+                                       else
+                                               ret = -errno;
+                                       fprintf(stderr,
+                                               "%s: get btime failed '%s': %s\n",
+                                               progname, optarg,
+                                               strerror(-ret));
+                                       goto err;
+                               }
+
+                               ref = stx.stx_btime.tv_sec;
+                       } else {
+                               struct stat statbuf;
+
+                               if (stat(optarg, &statbuf) < 0) {
+                                       fprintf(stderr,
+                                               "%s: cannot stat file '%s': %s\n",
+                                               progname, optarg,
+                                               strerror(errno));
+                                       ret = -errno;
+                                       goto err;
+                               }
+
+                               switch (y) {
+                               case 'a':
+                                       ref = statbuf.st_atime;
+                                       break;
+                               case 'm':
+                                       ref = statbuf.st_mtime;
+                                       break;
+                               case 'c':
+                                       ref = statbuf.st_ctime;
+                                       break;
+                               default:
+                                       fprintf(stderr,
+                                               "%s: invalid Y argument: '%c'\n",
+                                               progname, x);
+                                       ret = -EINVAL;
+                                       goto err;
+                               }
+                       }
+
+                       switch (x) {
+                       case 'a':
+                               xidx = NEWERXY_ATIME;
+                               break;
+                       case 'm':
+                               xidx = NEWERXY_MTIME;
+                               break;
+                       case 'c':
+                               xidx = NEWERXY_CTIME;
+                               break;
+                       case 'b':
+                       case 'B':
+                               xidx = NEWERXY_BTIME;
+                               break;
+                       default:
+                               fprintf(stderr,
+                                       "%s: invalid X argument: '%c'\n",
+                                       progname, x);
+                               ret = -EINVAL;
+                               goto err;
+                       }
+
+                       negidx = !!neg_opt;
+                       newery = &param.fp_newery[xidx][negidx];
+
+                       if (*newery == 0) {
+                               *newery = ref;
+                       } else {
+                               if (negidx)
+                                       *newery = *newery > ref ? ref : *newery;
+                               else
+                                       *newery = *newery > ref ? *newery : ref;
+                       }
+                       param.fp_newerxy = 1;
+                       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;
-                                }
-                        }
+                               if (str2quotaid(&param.fp_gid, optarg)) {
+                                       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;
+                       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);
+                       rc = mdthash_input(optarg, &param.fp_hash_inflags,
+                                          &param.fp_hash_exflags,
+                                          &param.fp_hash_type);
+                       if (rc) {
                                ret = -1;
                                goto err;
                        }
-                       param.fp_check_hash_type = 1;
+                       if (param.fp_hash_inflags || param.fp_hash_exflags)
+                               param.fp_check_hash_flag = 1;
                        param.fp_exclude_hash_type = !!neg_opt;
                        break;
+               case 'l':
+                       param.fp_lazy = 1;
+                       break;
                case 'L':
                        ret = name2layout(&param.fp_layout, optarg);
                        if (ret)
@@ -3827,21 +5154,21 @@ static int lfs_find(int argc, char **argv)
                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;
-                                }
-                        }
+                               if (str2quotaid(&param.fp_uid, optarg)) {
+                                       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':
+                       break;
+               case 'n':
                        param.fp_pattern = (char *)optarg;
                        param.fp_exclude_pattern = !!neg_opt;
-                        break;
+                       break;
                case 'N':
                        if (optarg[0] == '+') {
                                param.fp_mirror_count_sign = -1;
@@ -3851,8 +5178,10 @@ static int lfs_find(int argc, char **argv)
                                optarg++;
                        }
 
+                       errno = 0;
                        param.fp_mirror_count = strtoul(optarg, &endptr, 0);
-                       if (*endptr != '\0') {
+                       if (errno != 0 || *endptr != '\0' ||
+                           param.fp_mirror_count > LUSTRE_MIRROR_COUNT_MAX) {
                                fprintf(stderr,
                                        "error: bad mirror count '%s'\n",
                                        optarg);
@@ -3861,56 +5190,57 @@ static int lfs_find(int argc, char **argv)
                        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;
-                        }
+               case 'm':
+               case 'i':
+               case 'O': {
+                       char *buf, *token, *next, *p;
+                       int len = 1;
+                       void *tmp;
+
+                       buf = strdup(optarg);
+                       if (!buf) {
+                               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') {
+                       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) {
+                               if (!tmp) {
                                        ret = -ENOMEM;
                                        goto err_free;
                                }
 
                                param.fp_mdt_uuid = tmp;
-                        } else {
+                       } 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) {
+                               if (!tmp) {
                                        ret = -ENOMEM;
                                        goto err_free;
                                }
 
                                param.fp_obd_uuid = tmp;
-                        }
-                        for (token = buf; token && *token; token = next) {
+                       }
+                       for (token = buf; token && *token; token = next) {
                                struct obd_uuid *puuid;
+
                                if (c == 'm') {
                                        puuid =
                                        &param.fp_mdt_uuid[param.fp_num_mdts++];
@@ -3918,12 +5248,12 @@ static int lfs_find(int argc, char **argv)
                                        puuid =
                                        &param.fp_obd_uuid[param.fp_num_obds++];
                                }
-                                p = strchr(token, ',');
-                                next = 0;
-                                if (p) {
-                                        *p = 0;
-                                        next = p+1;
-                                }
+                               p = strchr(token, ',');
+                               next = 0;
+                               if (p) {
+                                       *p = 0;
+                                       next = p+1;
+                               }
 
                                if (strlen(token) > sizeof(puuid->uuid) - 1) {
                                        ret = -E2BIG;
@@ -3971,10 +5301,9 @@ err_free:
                case LFS_PROJID_OPT:
                        rc = name2projid(&param.fp_projid, optarg);
                        if (rc) {
-                               param.fp_projid = strtoul(optarg, &endptr, 10);
-                               if (*endptr != '\0') {
+                               if (str2quotaid(&param.fp_projid, optarg)) {
                                        fprintf(stderr,
-                                               "Invalid project ID: %s",
+                                               "Invalid project ID: %s\n",
                                                optarg);
                                        ret = -1;
                                        goto err;
@@ -4013,6 +5342,9 @@ err_free:
 
                        ret = llapi_parse_size(optarg, &param.fp_stripe_size,
                                               &param.fp_stripe_size_units, 0);
+                       /* assume units of KB if too small to be valid */
+                       if (param.fp_stripe_size < 4096)
+                               param.fp_stripe_size *= 1024;
                        if (ret) {
                                fprintf(stderr, "error: bad stripe_size '%s'\n",
                                        optarg);
@@ -4061,8 +5393,10 @@ err_free:
                                optarg++;
                        }
 
+                       errno = 0;
                        param.fp_mdt_count = strtoul(optarg, &endptr, 0);
-                       if (*endptr != '\0') {
+                       if (errno != 0 || *endptr != '\0' ||
+                           param.fp_mdt_count >= UINT32_MAX) {
                                fprintf(stderr, "error: bad mdt_count '%s'\n",
                                        optarg);
                                ret = -1;
@@ -4071,31 +5405,55 @@ err_free:
                        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;
-        }
+               case 'z':
+                       if (optarg[0] == '+') {
+                               param.fp_ext_size_sign = -1;
+                               optarg++;
+                       } else if (optarg[0] == '-') {
+                               param.fp_ext_size_sign =  1;
+                               optarg++;
+                       }
+
+                       ret = llapi_parse_size(optarg, &param.fp_ext_size,
+                                              &param.fp_ext_size_units, 0);
+                       if (ret) {
+                               fprintf(stderr, "error: bad ext-size '%s'\n",
+                                       optarg);
+                               goto err;
+                       }
+                       param.fp_ext_size /= SEL_UNIT_SIZE;
+                       param.fp_ext_size_units /= SEL_UNIT_SIZE;
+                       param.fp_check_ext_size = 1;
+                       param.fp_exclude_ext_size = !!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)
+               if (rc && !ret) {
                        ret = rc;
+                       pathbad = pathstart;
+               }
        } while (++pathstart < pathend);
 
-        if (ret)
-                fprintf(stderr, "error: %s failed for %s.\n",
-                        argv[0], argv[optind - 1]);
+       if (ret)
+               fprintf(stderr, "%s: failed for '%s': %s\n",
+                       progname, argv[pathbad], strerror(-rc));
+
 err:
        if (param.fp_obd_uuid && param.fp_num_alloc_obds)
                free(param.fp_obd_uuid);
@@ -4103,7 +5461,7 @@ err:
        if (param.fp_mdt_uuid && param.fp_num_alloc_mdts)
                free(param.fp_mdt_uuid);
 
-        return ret;
+       return ret;
 }
 
 static int lfs_getstripe_internal(int argc, char **argv,
@@ -4112,6 +5470,8 @@ static int lfs_getstripe_internal(int argc, char **argv,
        struct option long_opts[] = {
 /* find        { .val = 'A',   .name = "atime",        .has_arg = required_argument }*/
 /* find        { .val = 'b',   .name = "blocks",       .has_arg = required_argument }*/
+/* find        { .val = 'B',   .name = "btime",        .has_arg = required_argument }*/
+/* find        { .val = 'B',   .name = "Btime",        .has_arg = required_argument }*/
        { .val = LFS_COMP_COUNT_OPT,
                        .name = "comp-count",   .has_arg = no_argument },
        { .val = LFS_COMP_COUNT_OPT,
@@ -4143,6 +5503,7 @@ static int lfs_getstripe_internal(int argc, char **argv,
        { .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 },
+/* find { .val = 'l',  .name = "lazy",         .has_arg = no_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 },
@@ -4165,6 +5526,8 @@ static int lfs_getstripe_internal(int argc, char **argv,
 /* 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 },
+       { .val = 'z',   .name = "extension-size", .has_arg = no_argument },
+       { .val = 'z',   .name = "ext-size",     .has_arg = no_argument },
        { .name = NULL } };
        int c, rc;
        int neg_opt = 0;
@@ -4173,7 +5536,7 @@ static int lfs_getstripe_internal(int argc, char **argv,
        char *end, *tmp;
 
        while ((c = getopt_long(argc, argv,
-                       "-cdDE::FghiI::LmMNoO:pqrRsSvy",
+                       "-cdDE::FghiI::LmMNoO:pqrRsSvyz",
                        long_opts, NULL)) != -1) {
                if (neg_opt)
                        --neg_opt;
@@ -4208,13 +5571,13 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        param->fp_max_depth = 0;
                        break;
                case LFS_COMP_FLAGS_OPT:
-                       if (optarg != NULL) {
+                       if (optarg) {
                                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",
+                                       fprintf(stderr,
+                                               "error: %s bad component flags '%s'.\n",
                                                argv[0], optarg);
                                        return CMD_HELP;
                                }
@@ -4225,7 +5588,7 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        }
                        break;
                case LFS_COMP_START_OPT:
-                       if (optarg != NULL) {
+                       if (optarg) {
                                tmp = optarg;
                                if (tmp[0] == '+') {
                                        param->fp_comp_start_sign = -1;
@@ -4238,19 +5601,20 @@ static int lfs_getstripe_internal(int argc, char **argv,
                                                &param->fp_comp_start,
                                                &param->fp_comp_start_units, 0);
                                if (rc != 0) {
-                                       fprintf(stderr, "error: %s bad "
-                                               "component start '%s'.\n",
+                                       fprintf(stderr,
+                                               "error: %s bad component start '%s'.\n",
                                                argv[0], tmp);
                                        return CMD_HELP;
-                               } else {
-                                       param->fp_check_comp_start = 1;
                                }
+                               param->fp_check_comp_start = 1;
                        } else {
                                param->fp_verbose |= VERBOSE_COMP_START;
                                param->fp_max_depth = 0;
                        }
                        break;
-               case LFS_MIRROR_INDEX_OPT:
+               case LFS_MIRROR_INDEX_OPT: {
+                       unsigned long int mirror_index;
+
                        if (optarg[0] == '+') {
                                param->fp_mirror_index_sign = -1;
                                optarg++;
@@ -4259,14 +5623,19 @@ static int lfs_getstripe_internal(int argc, char **argv,
                                optarg++;
                        }
 
-                       param->fp_mirror_index = strtoul(optarg, &end, 0);
-                       if (*end != '\0' || (param->fp_mirror_index == 0 &&
+                       errno = 0;
+                       mirror_index = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' ||
+                           mirror_index > UINT16_MAX || (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;
                        }
+
+                       param->fp_mirror_index = (__u16)mirror_index;
+
                        if (param->fp_mirror_id != 0) {
                                fprintf(stderr,
                                        "%s %s: can't specify both mirror index and mirror ID\n",
@@ -4276,7 +5645,10 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        param->fp_check_mirror_index = 1;
                        param->fp_exclude_mirror_index = !!neg_opt;
                        break;
-               case LFS_MIRROR_ID_OPT:
+               }
+               case LFS_MIRROR_ID_OPT: {
+                       unsigned long int mirror_id;
+
                        if (optarg[0] == '+') {
                                param->fp_mirror_id_sign = -1;
                                optarg++;
@@ -4285,14 +5657,19 @@ static int lfs_getstripe_internal(int argc, char **argv,
                                optarg++;
                        }
 
-                       param->fp_mirror_id = strtoul(optarg, &end, 0);
-                       if (*end != '\0' || (param->fp_mirror_id == 0 &&
+                       errno = 0;
+                       mirror_id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' ||
+                           mirror_id > UINT16_MAX || (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;
                        }
+
+                       param->fp_mirror_id = (__u16)mirror_id;
+
                        if (param->fp_mirror_index != 0) {
                                fprintf(stderr,
                                        "%s %s: can't specify both mirror index and mirror ID\n",
@@ -4302,6 +5679,7 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        param->fp_check_mirror_id = 1;
                        param->fp_exclude_mirror_id = !!neg_opt;
                        break;
+               }
                case 'd':
                        param->fp_max_depth = 0;
                        break;
@@ -4309,7 +5687,7 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        param->fp_get_default_lmv = 1;
                        break;
                case 'E':
-                       if (optarg != NULL) {
+                       if (optarg) {
                                tmp = optarg;
                                if (tmp[0] == '+') {
                                        param->fp_comp_end_sign = -1;
@@ -4327,10 +5705,13 @@ static int lfs_getstripe_internal(int argc, char **argv,
                                        rc = llapi_parse_size(tmp,
                                                &param->fp_comp_end,
                                                &param->fp_comp_end_units, 0);
+                                       /* assume units of KB if too small */
+                                       if (param->fp_comp_end < 4096)
+                                               param->fp_comp_end *= 1024;
                                }
                                if (rc != 0) {
-                                       fprintf(stderr, "error: %s bad "
-                                               "component end '%s'.\n",
+                                       fprintf(stderr,
+                                               "error: %s bad component end '%s'.\n",
                                                argv[0], tmp);
                                        return CMD_HELP;
                                }
@@ -4359,17 +5740,16 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        }
                        break;
                case 'I':
-                       if (optarg != NULL) {
+                       if (optarg) {
                                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",
+                                       fprintf(stderr,
+                                               "error: %s bad component id '%s'\n",
                                                argv[0], optarg);
                                        return CMD_HELP;
-                               } else {
-                                       param->fp_check_comp_id = 1;
                                }
+                               param->fp_check_comp_id = 1;
                        } else {
                                param->fp_max_depth = 0;
                                param->fp_verbose |= VERBOSE_COMP_ID;
@@ -4383,8 +5763,8 @@ static int lfs_getstripe_internal(int argc, char **argv,
                        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");
+                       fprintf(stderr,
+                               "warning: '-M' deprecated, use '--mdt-index' or '-m' instead\n");
 #endif
                case 'm':
                        if (!(param->fp_verbose & VERBOSE_DETAIL))
@@ -4433,6 +5813,12 @@ static int lfs_getstripe_internal(int argc, char **argv,
                case 'y':
                        param->fp_yaml = 1;
                        break;
+               case 'z':
+                       if (!(param->fp_verbose & VERBOSE_DETAIL)) {
+                               param->fp_verbose |= VERBOSE_EXT_SIZE;
+                               param->fp_max_depth = 0;
+                       }
+                       break;
                default:
                        return CMD_HELP;
                }
@@ -4472,40 +5858,40 @@ static int lfs_getstripe_internal(int argc, char **argv,
 
 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;
+       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)
+               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;
-        }
+       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;
+       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"))
+               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);
-        }
+               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;
+       return rc;
 }
 
 static int lfs_getstripe(int argc, char **argv)
@@ -4529,6 +5915,7 @@ static int lfs_getdirstripe(int argc, char **argv)
        { .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 = 'v',   .name = "verbose",      .has_arg = no_argument },
        { .val = 'y',   .name = "yaml",         .has_arg = no_argument },
        { .name = NULL } };
        int c, rc;
@@ -4536,8 +5923,7 @@ static int lfs_getdirstripe(int argc, char **argv)
        param.fp_get_lmv = 1;
 
        while ((c = getopt_long(argc, argv,
-                               "cDHimO:rtTy", long_opts, NULL)) != -1)
-       {
+                               "cDHimO:rtTvy", long_opts, NULL)) != -1) {
                switch (c) {
                case 'c':
                case 'T':
@@ -4552,8 +5938,8 @@ static int lfs_getdirstripe(int argc, char **argv)
                        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");
+                       fprintf(stderr,
+                               "warning: '-t' deprecated, use '--mdt-hash' or '-H' instead\n");
 #endif
                case 'H':
                        param.fp_verbose |= VERBOSE_HASH_TYPE;
@@ -4570,10 +5956,15 @@ static int lfs_getdirstripe(int argc, char **argv)
                case 'r':
                        param.fp_recursive = 1;
                        break;
+               case 'v':
+                       param.fp_verbose |= VERBOSE_DETAIL;
+                       break;
                case 'y':
                        param.fp_yaml = 1;
                        break;
                default:
+                       fprintf(stderr, "%s %s: unrecognized option '%s'\n",
+                               progname, argv[0], argv[optind - 1]);
                        return CMD_HELP;
                }
        }
@@ -4603,13 +5994,14 @@ enum mntdf_flags {
        MNTDF_LAZY      = 0x0004,
        MNTDF_VERBOSE   = 0x0008,
        MNTDF_SHOW      = 0x0010,
+       MNTDF_DECIMAL   = 0x0020,
 };
 
-#define COOK(value)                                            \
+#define COOK(value, base)                                      \
 ({                                                             \
        int radix = 0;                                          \
-       while (value > 1024) {                                  \
-               value /= 1024;                                  \
+       while (value > base) {                                  \
+               value /= base;                                  \
                radix++;                                        \
        }                                                       \
        radix;                                                  \
@@ -4639,13 +6031,35 @@ static inline int obd_statfs_ratio(const struct obd_statfs *st, bool inodes)
        return (ratio - (int)ratio) > 0 ? (int)(ratio + 1) : (int)ratio;
 }
 
+/*
+ * This is to identify various problem states for "lfs df" if .osn_err = true,
+ * so only show flags reflecting those states by default. Informational states
+ * are only shown with "-v" and use lower-case names to distinguish them.
+ * UNUSED[12] were for "EROFS = 30" until 1.6 but are now available for use.
+ */
+static struct obd_statfs_state_names {
+       enum obd_statfs_state   osn_state;
+       const char              osn_name;
+       bool                    osn_err;
+} oss_names[] = {
+       { .osn_state = OS_STATFS_DEGRADED,   .osn_name = 'D', .osn_err = true },
+       { .osn_state = OS_STATFS_READONLY,   .osn_name = 'R', .osn_err = true },
+       { .osn_state = OS_STATFS_NOPRECREATE,.osn_name = 'N', .osn_err = true },
+       { .osn_state = OS_STATFS_UNUSED1,    .osn_name = '?', .osn_err = true },
+       { .osn_state = OS_STATFS_UNUSED2,    .osn_name = '?', .osn_err = true },
+       { .osn_state = OS_STATFS_ENOSPC,     .osn_name = 'S', .osn_err = true },
+       { .osn_state = OS_STATFS_ENOINO,     .osn_name = 'I', .osn_err = true },
+       { .osn_state = OS_STATFS_SUM,        .osn_name = 'a', /* aggregate */ },
+       { .osn_state = OS_STATFS_NONROT,     .osn_name = 'f', /* flash */     },
+};
+
 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";
+       char *suffix = flags & MNTDF_DECIMAL ? "kMGTPEZY" : "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)];
@@ -4673,11 +6087,12 @@ static int showdf(char *mntdir, struct obd_statfs *stat,
                ratio = obd_statfs_ratio(stat, flags & MNTDF_INODES);
 
                if (flags & MNTDF_COOKED) {
-                       int i;
+                       int base = flags & MNTDF_DECIMAL ? 1000 : 1024;
                        double cook_val;
+                       int i;
 
                        cook_val = (double)total;
-                       i = COOK(cook_val);
+                       i = COOK(cook_val, base);
                        if (i > 0)
                                snprintf(tbuf, sizeof(tbuf), HDF, cook_val,
                                         suffix[i - 1]);
@@ -4685,7 +6100,7 @@ static int showdf(char *mntdir, struct obd_statfs *stat,
                                snprintf(tbuf, sizeof(tbuf), CDF, total);
 
                        cook_val = (double)used;
-                       i = COOK(cook_val);
+                       i = COOK(cook_val, base);
                        if (i > 0)
                                snprintf(ubuf, sizeof(ubuf), HDF, cook_val,
                                         suffix[i - 1]);
@@ -4693,7 +6108,7 @@ static int showdf(char *mntdir, struct obd_statfs *stat,
                                snprintf(ubuf, sizeof(ubuf), CDF, used);
 
                        cook_val = (double)avail;
-                       i = COOK(cook_val);
+                       i = COOK(cook_val, base);
                        if (i > 0)
                                snprintf(abuf, sizeof(abuf), HDF, cook_val,
                                         suffix[i - 1]);
@@ -4712,21 +6127,14 @@ static int showdf(char *mntdir, struct obd_statfs *stat,
                        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;
+                       uint32_t 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;
+                       for (i = 0; i < ARRAY_SIZE(oss_names); i++) {
+                               if (oss_names[i].osn_state & stat->os_state &&
+                                   (oss_names[i].osn_err ||
+                                    flags & MNTDF_VERBOSE))
+                                       printf("%c", oss_names[i].osn_name);
                        }
                }
 
@@ -4771,6 +6179,7 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
                { .st_op = LL_STATFS_LOV,       .st_name = "OST" },
                { .st_name = NULL } };
        struct ll_stat_type *tp;
+       __u64 ost_files = 0;
        __u64 ost_ffree = 0;
        __u32 index;
        __u32 type;
@@ -4780,7 +6189,7 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
 
        if (pool) {
                poolname = strchr(pool, '.');
-               if (poolname != NULL) {
+               if (poolname) {
                        if (strncmp(fsname, pool, strlen(fsname))) {
                                fprintf(stderr, "filesystem name incorrect\n");
                                return -ENODEV;
@@ -4834,7 +6243,8 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
                                rc = rc2;
                        }
 
-                       /* If we have OSTs then don't report MDT block counts.
+                       /*
+                        * 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
@@ -4853,11 +6263,13 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
                                             obd_uuid2str(&uuid_buf)) != 1)
                                continue;
 
-                       /* the llapi_obd_statfs() call may have returned with
+                       /*
+                        * the llapi_obd_fstatfs() 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. */
+                        * 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);
@@ -4878,6 +6290,7 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
                                sum.os_ffree += stat_buf.os_ffree;
                                sum.os_files += stat_buf.os_files;
                        } else /* if (tp->st_op == LL_STATFS_LOV) */ {
+                               ost_files += stat_buf.os_files;
                                ost_ffree += stat_buf.os_ffree;
                        }
                        sum.os_blocks += stat_buf.os_blocks *
@@ -4891,11 +6304,13 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
 
        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) {
+       /*
+        * If we have _some_ OSTs, but don't have as many free objects on the
+        * OST as inodes on the MDTs, reduce the reported number of inodes
+        * to compensate, so that the "inodes in use" number is correct.
+        * This should be kept in sync with ll_statfs_internal().
+        */
+       if (ost_files && ost_ffree < sum.os_ffree) {
                sum.os_files = (sum.os_files - sum.os_ffree) + ost_ffree;
                sum.os_ffree = ost_ffree;
        }
@@ -4908,58 +6323,39 @@ static int mntdf(char *mntdir, char *fsname, char *pool, enum mntdf_flags flags,
        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;
-
+       char *dname;
+       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;
+       bool delete = false;
+       bool foreign_mode = false;
+       mode_t mode = S_IRWXU | S_IRWXG | S_IRWXO;
+       mode_t previous_mode = 0;
+       char *xattr = NULL;
+       __u32 type = LU_FOREIGN_TYPE_SYMLINK, flags = 0;
        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 = LFS_LAYOUT_FLAGS_OPT,
+                       .name = "flags",        .has_arg = required_argument },
+       { .val = LFS_LAYOUT_FOREIGN_OPT,
+                       .name = "foreign",      .has_arg = optional_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
+/* find { .val = 'l',  .name = "lazy",         .has_arg = no_argument }, */
        { .val = 'm',   .name = "mdt-index",    .has_arg = required_argument },
        { .val = 'm',   .name = "mdt",          .has_arg = required_argument },
 #endif
@@ -4972,20 +6368,25 @@ static int lfs_setdirstripe(int argc, char **argv)
 #endif
        { .val = 'T',   .name = "mdt-count",    .has_arg = required_argument },
 /* setstripe { .val = 'y', .name = "yaml",     .has_arg = no_argument }, */
+       { .val = 'x',   .name = "xattr",        .has_arg = required_argument },
        { .name = NULL } };
+       int result = 0;
 
        setstripe_args_init(&lsa);
 
-       while ((c = getopt_long(argc, argv, "c:dDi:H:m:o:t:T:", long_opts,
-                               NULL)) >= 0) {
+       while ((c = getopt_long(argc, argv, "c:dDi:H:m:o:t:T:x:",
+                               long_opts, NULL)) >= 0) {
                switch (c) {
                case 0:
                        /* Long options. */
                        break;
                case 'c':
                case 'T':
+                       errno = 0;
                        lsa.lsa_stripe_count = strtoul(optarg, &end, 0);
-                       if (*end != '\0') {
+                       if (errno != 0 || *end != '\0' ||
+                           lsa.lsa_stripe_count < -1 ||
+                           lsa.lsa_stripe_count > LOV_MAX_STRIPE_COUNT) {
                                fprintf(stderr,
                                        "%s %s: invalid stripe count '%s'\n",
                                        progname, argv[0], optarg);
@@ -4999,10 +6400,50 @@ static int lfs_setdirstripe(int argc, char **argv)
                case 'D':
                        default_stripe = true;
                        break;
+               case LFS_LAYOUT_FOREIGN_OPT:
+                       if (optarg) {
+                               /* check pure numeric */
+                               type = strtoul(optarg, &end, 0);
+                               if (*end) {
+                                       /* check name */
+                                       type = check_foreign_type_name(optarg);
+                                       if (type == LU_FOREIGN_TYPE_UNKNOWN) {
+                                               fprintf(stderr,
+                                                       "%s %s: unknown foreign type '%s'\n",
+                                                       progname, argv[0],
+                                                       optarg);
+                                               return CMD_HELP;
+                                       }
+                               } else if (type >= UINT32_MAX) {
+                                       fprintf(stderr,
+                                               "%s %s: invalid foreign type '%s'\n",
+                                               progname, argv[0], optarg);
+                                       return CMD_HELP;
+                               }
+                       }
+                       foreign_mode = true;
+                       break;
+               case LFS_LAYOUT_FLAGS_OPT:
+                       errno = 0;
+                       flags = strtoul(optarg, &end, 16);
+                       if (errno != 0 || *end != '\0' ||
+                           flags >= UINT32_MAX) {
+                               fprintf(stderr,
+                                       "%s %s: invalid hex flags '%s'\n",
+                                       progname, argv[0], optarg);
+                               return CMD_HELP;
+                       }
+                       if (!foreign_mode) {
+                               fprintf(stderr,
+                                       "%s %s: hex flags must be specified with --foreign option\n",
+                                       progname, argv[0]);
+                               return CMD_HELP;
+                       }
+                       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");
+                       fprintf(stderr,
+                               "warning: '--hash-type' and '-t' deprecated, use '--mdt-hash' or '-H' instead\n");
 #endif
                case 'H':
                        lsa.lsa_pattern = check_hashtype(optarg);
@@ -5017,8 +6458,6 @@ static int lfs_setdirstripe(int argc, char **argv)
 #if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 17, 53, 0)
                case 'm':
 #endif
-                       fprintf(stderr, "warning: '-m' is deprecated, "
-                               "use '--mode' or '-o' instead\n");
 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
                        if (strcmp(argv[optind - 1], "--index") == 0)
                                fprintf(stderr,
@@ -5027,7 +6466,7 @@ static int lfs_setdirstripe(int argc, char **argv)
 #endif
                        lsa.lsa_nr_tgts = parse_targets(mdts,
                                                sizeof(mdts) / sizeof(__u32),
-                                               lsa.lsa_nr_tgts, optarg);
+                                               lsa.lsa_nr_tgts, optarg, NULL);
                        if (lsa.lsa_nr_tgts < 0) {
                                fprintf(stderr,
                                        "%s %s: invalid MDT target(s) '%s'\n",
@@ -5041,12 +6480,15 @@ static int lfs_setdirstripe(int argc, char **argv)
                        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");
+                       fprintf(stderr,
+                               "warning: '-m' is deprecated, use '--mode' or '-o' instead\n");
 #endif
                case 'o':
                        mode_opt = optarg;
                        break;
+               case 'x':
+                       xattr = optarg;
+                       break;
                default:
                        fprintf(stderr, "%s %s: unrecognized option '%s'\n",
                                progname, argv[0], argv[optind - 1]);
@@ -5060,14 +6502,36 @@ static int lfs_setdirstripe(int argc, char **argv)
                return CMD_HELP;
        }
 
-       if (!delete && lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT &&
-           lsa.lsa_stripe_count == LLAPI_LAYOUT_DEFAULT) {
+       if (xattr && !foreign_mode) {
+               /*
+                * only print a warning as this is armless and will be
+                * ignored
+                */
+               fprintf(stderr,
+                       "%s %s: xattr has been specified for non-foreign layout\n",
+                       progname, argv[0]);
+       } else if (foreign_mode && !xattr) {
+               fprintf(stderr,
+                       "%s %s: xattr must be provided in foreign mode\n",
+                       progname, argv[0]);
+               return CMD_HELP;
+       }
+
+       if (foreign_mode && (delete || default_stripe || lsa.lsa_nr_tgts ||
+           lsa.lsa_tgts || setstripe_args_specified(&lsa))) {
                fprintf(stderr,
-                       "%s %s: stripe offset and count must be specified\n",
+                       "%s %s: only --xattr/--flags/--mode options are valid with --foreign\n",
                        progname, argv[0]);
                return CMD_HELP;
        }
 
+       if (!delete && lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT &&
+           lsa.lsa_stripe_count == LLAPI_LAYOUT_DEFAULT && !foreign_mode) {
+               /* if no parameters set, create directory on least-used MDTs */
+               lsa.lsa_stripe_off = -1;
+               lsa.lsa_stripe_count = 1;
+       }
+
        if (delete &&
            (lsa.lsa_stripe_off != LLAPI_LAYOUT_DEFAULT ||
             lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT)) {
@@ -5077,7 +6541,7 @@ static int lfs_setdirstripe(int argc, char **argv)
                return CMD_HELP;
        }
 
-       if (mode_opt != NULL) {
+       if (mode_opt) {
                mode = strtoul(mode_opt, &end, 8);
                if (*end != '\0') {
                        fprintf(stderr,
@@ -5088,6 +6552,25 @@ static int lfs_setdirstripe(int argc, char **argv)
                previous_mode = umask(0);
        }
 
+       /* foreign LMV/dir case */
+       if (foreign_mode) {
+               if (argc > optind + 1) {
+                       fprintf(stderr,
+                               "%s %s: cannot specify multiple foreign dirs\n",
+                               progname, argv[0]);
+                       return CMD_HELP;
+               }
+
+               dname = argv[optind];
+               result = llapi_dir_create_foreign(dname, mode, type, flags,
+                                                 xattr);
+               if (result != 0)
+                       fprintf(stderr,
+                               "%s mkdir: can't create foreign dir '%s': %s\n",
+                               progname, dname, strerror(-result));
+               return result;
+       }
+
        /*
         * initialize stripe parameters, in case param is converted to specific,
         * i.e, 'lfs mkdir -i -1 -c N', always allocate space for lsp_tgts.
@@ -5095,13 +6578,18 @@ static int lfs_setdirstripe(int argc, char **argv)
        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) {
+       if (!param) {
                fprintf(stderr,
                        "%s %s: cannot allocate memory for parameters: %s\n",
                        progname, argv[0], strerror(ENOMEM));
                return CMD_HELP;
        }
 
+       /* if "lfs setdirstripe -D -i -1" is used, assume 1-stripe directory */
+       if (default_stripe && lsa.lsa_stripe_off == -1 &&
+           (lsa.lsa_stripe_count == LLAPI_LAYOUT_DEFAULT ||
+            lsa.lsa_stripe_count == 0))
+               lsa.lsa_stripe_count = 1;
        if (lsa.lsa_stripe_count != LLAPI_LAYOUT_DEFAULT)
                param->lsp_stripe_count = lsa.lsa_stripe_count;
        if (lsa.lsa_stripe_off == LLAPI_LAYOUT_DEFAULT)
@@ -5111,16 +6599,17 @@ static int lfs_setdirstripe(int argc, char **argv)
        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_stripe_pattern = LMV_HASH_TYPE_UNKNOWN;
        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);
+                       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;
                }
@@ -5134,114 +6623,23 @@ static int lfs_setdirstripe(int argc, char **argv)
        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 set default stripe on dir '%s': %s\n",
+                                       progname, dname, strerror(-result));
+                       continue;
                }
 
-               if (result) {
+               result = llapi_dir_create(dname, mode, param);
+               if (result)
                        fprintf(stderr,
-                               "%s setdirstripe: cannot create stripe dir '%s': %s\n",
+                               "%s setdirstripe: cannot create dir '%s': %s\n",
                                progname, dname, strerror(-result));
-                       break;
-               }
-               dname = argv[++optind];
-       } while (dname != NULL);
+       } while (!result && (dname = argv[++optind]));
 
-       if (mode_opt != NULL)
+       if (mode_opt)
                umask(previous_mode);
 
-       free(lsb);
        free(param);
        return result;
 }
@@ -5261,11 +6659,12 @@ static int lfs_rmentry(int argc, char **argv)
 
        index = 1;
        dname = argv[index];
-       while (dname != NULL) {
+       while (dname) {
                result = llapi_direntry_remove(dname);
                if (result) {
-                       fprintf(stderr, "error: %s: remove dir entry '%s' "
-                               "failed\n", argv[0], dname);
+                       fprintf(stderr,
+                               "error: %s: remove dir entry '%s' failed\n",
+                               argv[0], dname);
                        break;
                }
                dname = argv[++index];
@@ -5273,6 +6672,33 @@ static int lfs_rmentry(int argc, char **argv)
        return result;
 }
 
+static int lfs_unlink_foreign(int argc, char **argv)
+{
+       char *name;
+       int   index;
+       int   result = 0;
+
+       if (argc <= 1) {
+               fprintf(stderr, "error: %s: missing pathname\n",
+                       argv[0]);
+               return CMD_HELP;
+       }
+
+       index = 1;
+       name = argv[index];
+       while (name != NULL) {
+               result = llapi_unlink_foreign(name);
+               if (result) {
+                       fprintf(stderr,
+                               "error: %s: unlink foreign entry '%s' failed\n",
+                               argv[0], name);
+                       break;
+               }
+               name = argv[++index];
+       }
+       return result;
+}
+
 static int lfs_mv(int argc, char **argv)
 {
        struct lmv_user_md lmu = { LMV_USER_MAGIC };
@@ -5293,12 +6719,14 @@ static int lfs_mv(int argc, char **argv)
                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");
+                       fprintf(stderr,
+                               "warning: '-M' deprecated, use '--mdt-index' or '-m' instead\n");
 #endif
                case 'm':
+                       errno = 0;
                        lmu.lum_stripe_offset = strtoul(optarg, &end, 0);
-                       if (*end != '\0') {
+                       if (errno != 0 || *end != '\0' ||
+                           lmu.lum_stripe_offset >= UINT32_MAX) {
                                fprintf(stderr, "%s mv: bad MDT index '%s'\n",
                                        progname, optarg);
                                return CMD_HELP;
@@ -5314,7 +6742,7 @@ static int lfs_mv(int argc, char **argv)
                }
        }
 
-       if (lmu.lum_stripe_offset == -1) {
+       if (lmu.lum_stripe_offset == LMV_OFFSET_DEFAULT) {
                fprintf(stderr, "%s mv: MDT index must be specified\n",
                        progname);
                return CMD_HELP;
@@ -5325,6 +6753,7 @@ static int lfs_mv(int argc, char **argv)
                return CMD_HELP;
        }
 
+       lmu.lum_hash_type = LMV_HASH_TYPE_UNKNOWN;
 
        /* initialize migrate mdt parameters */
        param.fp_lmv_md = &lmu;
@@ -5332,19 +6761,19 @@ static int lfs_mv(int argc, char **argv)
        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,
+                       progname, argv[optind], lmu.lum_stripe_offset,
                        strerror(-rc));
        return rc;
 }
 
 static int lfs_osts(int argc, char **argv)
 {
-        return lfs_tgts(argc, argv);
+       return lfs_tgts(argc, argv);
 }
 
 static int lfs_mdts(int argc, char **argv)
 {
-        return lfs_tgts(argc, argv);
+       return lfs_tgts(argc, argv);
 }
 
 static int lfs_df(int argc, char **argv)
@@ -5355,18 +6784,21 @@ static int lfs_df(int argc, char **argv)
        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 = 'h',   .name = "human-readable", .has_arg = no_argument },
+       { .val = 'H',   .name = "si",           .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) {
+       while ((c = getopt_long(argc, argv, "hHilp:v", long_opts, NULL)) != -1) {
                switch (c) {
                case 'h':
-                       flags |= MNTDF_COOKED;
+                       flags = (flags & ~MNTDF_DECIMAL) | MNTDF_COOKED;
+                       break;
+               case 'H':
+                       flags |= MNTDF_COOKED | MNTDF_DECIMAL;
                        break;
                case 'i':
                        flags |= MNTDF_INODES;
@@ -5391,60 +6823,108 @@ static int lfs_df(int argc, char **argv)
                return rc;
        }
 
-       while (!llapi_search_mounts(path, index++, mntdir, fsname)) {
-               /* Check if we have a mount point */
-               if (mntdir[0] == '\0')
-                       continue;
+       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 print_instance(const char *mntdir, char *buf, size_t buflen,
+                         bool opt_instance, bool opt_fsname, bool opt_mntdir)
+{
+       int rc = 0;
+
+       if (opt_fsname == opt_instance) { /* both true or both false */
+               rc = llapi_getname(mntdir, buf, buflen);
+       } else if (opt_fsname) {
+               /*
+                * llapi_search_mounts() fills @buf with fsname, but that is not
+                * called if explicit paths are specified on the command-line
+                */
+               if (buf[0] == '\0')
+                       rc = llapi_get_fsname(mntdir, buf, buflen);
+       } else /* if (opt_instance) */ {
+               rc = llapi_get_instance(mntdir, buf, buflen);
+       }
+
+       if (rc < 0) {
+               fprintf(stderr, "cannot get instance for '%s': %s\n",
+                       mntdir, strerror(-rc));
+               return rc;
+       }
+
+       if (opt_mntdir)
+               printf("%s %s\n", buf, mntdir);
+       else
+               printf("%s\n", buf);
+
+       return 0;
+}
+
+static int lfs_getname(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'h',   .name = "help",         .has_arg = no_argument },
+       { .val = 'i',   .name = "instance",     .has_arg = no_argument },
+       { .val = 'n',   .name = "fsname",       .has_arg = no_argument },
+       { .name = NULL} };
+       bool opt_instance = false, opt_fsname = false;
+       char fsname[PATH_MAX] = "";
+       int rc = 0, rc2, c;
+
+       while ((c = getopt_long(argc, argv, "hin", long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'i':
+                       opt_instance = true;
+                       break;
+               case 'n':
+                       opt_fsname = true;
+                       break;
+               case 'h':
+               default:
+                       return CMD_HELP;
+               }
+       }
+
+       if (optind == argc) { /* no paths specified, get all paths. */
+               char mntdir[PATH_MAX] = "", path[PATH_MAX] = "";
+               int index = 0;
 
-               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 */
+               while (!llapi_search_mounts(path, index++, mntdir, fsname)) {
+                       rc2 = print_instance(mntdir, fsname, sizeof(fsname),
+                                            opt_instance, opt_fsname, true);
+                       if (!rc)
+                               rc = rc2;
+                       path[0] = fsname[0] = mntdir[0] = '\0';
+               }
+       } else { /* paths specified, only attempt to search these. */
+               bool opt_mntdir;
+
+               /* if only one path is given, print only requested info */
+               opt_mntdir = argc - optind > 1 || (opt_instance == opt_fsname);
+
+               for (; optind < argc; optind++) {
+                       rc2 = print_instance(argv[optind], fsname,
+                                            sizeof(fsname), opt_instance,
+                                            opt_fsname, opt_mntdir);
+                       if (!rc)
+                               rc = rc2;
+                       fsname[0] = '\0';
+               }
        }
 
        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'};
@@ -5484,7 +6964,7 @@ static int lfs_check(int argc, char **argv)
                return CMD_HELP;
        }
 
-        rc = llapi_search_mounts(NULL, 0, mntdir, NULL);
+       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",
@@ -5498,22 +6978,12 @@ static int lfs_check(int argc, char **argv)
                        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)
+#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
@@ -5522,54 +6992,58 @@ do {                                                                    \
  *        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;
+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;
+               ptr = strchr(spec, *tail);
+               if (!ptr)
+                       /* unknown specifier */
+                       goto error;
 
-                ind = ptr - spec;
+               ind = ptr - spec;
 
-                /* check if product will overflow the type */
-                if (!(v < ULONG_MAX / mult[ind]))
-                        goto error;
+               /* 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;
+               ADD_OVERFLOW(val, mult[ind] * v);
+               if (val == ULONG_MAX)
+                       goto error;
 
-                timestr = tail + 1;
-        }
+               timestr = tail + 1;
+       }
 
-        return val;
+       return val;
 
 error:
-        return ULONG_MAX;
+       return ULONG_MAX;
 }
 
 #define ARG2ULL(nr, str, def_units)                                    \
@@ -5588,35 +7062,46 @@ do {                                                                    \
 
 static inline int has_times_option(int argc, char **argv)
 {
-        int i;
+       int i;
 
-        for (i = 1; i < argc; i++)
-                if (!strcmp(argv[i], "-t"))
-                        return 1;
+       for (i = 1; i < argc; i++)
+               if (!strcmp(argv[i], "-t"))
+                       return 1;
+
+       return 0;
+}
 
-        return 0;
+static inline int lfs_verify_poolarg(char *pool)
+{
+       if (strnlen(optarg, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME) {
+               fprintf(stderr,
+                       "Pool name '%.*s' is longer than %d\n",
+                       LOV_MAXPOOLNAME, pool, LOV_MAXPOOLNAME);
+               return 1;
+       }
+       return 0;
 }
 
-int lfs_setquota_times(int argc, char **argv)
+int lfs_setquota_times(int argc, char **argv, struct if_quotactl *qctl)
 {
-        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[] = {
+       int c, rc;
+       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 },
+       { .val = LFS_POOL_OPT,
+                       .name = "pool",         .has_arg = required_argument },
        { .name = NULL } };
        int qtype;
 
-       memset(&qctl, 0, sizeof(qctl));
-       qctl.qc_cmd  = LUSTRE_Q_SETINFO;
-       qctl.qc_type = ALLQUOTA;
+       qctl->qc_cmd  = LUSTRE_Q_SETINFO;
+       qctl->qc_type = ALLQUOTA;
 
        while ((c = getopt_long(argc, argv, "b:gi:ptu",
                                long_opts, NULL)) != -1) {
@@ -5630,63 +7115,80 @@ int lfs_setquota_times(int argc, char **argv)
                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");
+                       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;
-        }
+                       qctl->qc_type = qtype;
+                       break;
+               case 'b':
+                       if (strncmp(optarg, NOTIFY_GRACE,
+                                   strlen(NOTIFY_GRACE)) == 0) {
+                               dqi->dqi_bgrace = NOTIFY_GRACE_TIME;
+                       } else {
+                               dqi->dqi_bgrace = str2sec(optarg);
+                               if (dqi->dqi_bgrace >= NOTIFY_GRACE_TIME) {
+                                       fprintf(stderr,
+                                               "error: bad block-grace: %s\n",
+                                               optarg);
+                                       return CMD_HELP;
+                               }
+                       }
+                       dqb->dqb_valid |= QIF_BTIME;
+                       break;
+               case 'i':
+                       if (strncmp(optarg, NOTIFY_GRACE,
+                                   strlen(NOTIFY_GRACE)) == 0) {
+                               dqi->dqi_igrace = NOTIFY_GRACE_TIME;
+                       } else {
+                               dqi->dqi_igrace = str2sec(optarg);
+                               if (dqi->dqi_igrace >= NOTIFY_GRACE_TIME) {
+                                       fprintf(stderr,
+                                               "error: bad inode-grace: %s\n",
+                                               optarg);
+                                       return CMD_HELP;
+                               }
+                       }
+                       dqb->dqb_valid |= QIF_ITIME;
+                       break;
+               case 't': /* Yes, of course! */
+                       break;
+               case LFS_POOL_OPT:
+                       if (lfs_verify_poolarg(optarg))
+                               return -1;
+                       fprintf(stdout,
+                               "Trying to set grace for pool %s\n", optarg);
+                       strncpy(qctl->qc_poolname, optarg, LOV_MAXPOOLNAME);
+                       qctl->qc_cmd  = LUSTRE_Q_SETINFOPOOL;
+                       break;
+               /* getopt prints error message for us when opterr != 0 */
+               default:
+                       return CMD_HELP;
+               }
+       }
 
-        if (optind != argc - 1) {
-                fprintf(stderr, "error: unexpected parameters encountered\n");
-                return CMD_HELP;
-        }
+       if (qctl->qc_type == ALLQUOTA) {
+               fprintf(stderr, "error: neither -u, -g nor -p specified\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");
+       if (optind != argc - 1) {
+               fprintf(stderr, "error: unexpected parameters encountered\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;
-        }
+       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;
+       return 0;
 }
 
 #define BSLIMIT (1 << 0)
@@ -5697,9 +7199,9 @@ quota_type:
 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 if_quotactl *qctl;
+       char *mnt, *obd_type;
+       struct obd_dqblk *dqb;
        struct option long_opts[] = {
        { .val = 'b',   .name = "block-softlimit",
                                                .has_arg = required_argument },
@@ -5716,79 +7218,93 @@ int lfs_setquota(int argc, char **argv)
        { .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 },
+       { .val = LFS_POOL_OPT,
+                       .name = "pool",         .has_arg = required_argument },
        { .name = NULL } };
-       unsigned limit_mask = 0;
-       char *endptr;
+       unsigned int limit_mask = 0;
        bool use_default = false;
-       int qtype;
+       int qtype, qctl_len;
+
+       qctl_len = sizeof(*qctl) + LOV_MAXPOOLNAME + 1;
+       qctl = malloc(qctl_len);
+       if (!qctl)
+               return -ENOMEM;
+
+       memset(qctl, 0, qctl_len);
+       obd_type = (char *)qctl->obd_type;
+       dqb = &qctl->qc_dqblk;
 
-       if (has_times_option(argc, argv))
-               return lfs_setquota_times(argc, argv);
+       if (has_times_option(argc, argv)) {
+               rc = lfs_setquota_times(argc, argv, qctl);
+               goto out;
+       }
 
-       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 */
+       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;
+                       qctl->qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = USRQUOTA;
-                       qctl.qc_id = 0;
+                       qctl->qc_id = 0;
                        goto quota_type_def;
                case 'u':
                        qtype = USRQUOTA;
-                       rc = name2uid(&qctl.qc_id, optarg);
+                       rc = name2uid(&qctl->qc_id, optarg);
                        goto quota_type;
                case 'G':
-                       qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
+                       qctl->qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = GRPQUOTA;
-                       qctl.qc_id = 0;
+                       qctl->qc_id = 0;
                        goto quota_type_def;
-                case 'g':
+               case 'g':
                        qtype = GRPQUOTA;
-                       rc = name2gid(&qctl.qc_id, optarg);
+                       rc = name2gid(&qctl->qc_id, optarg);
                        goto quota_type;
                case 'P':
-                       qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
+                       qctl->qc_cmd = LUSTRE_Q_SETDEFAULT;
                        qtype = PRJQUOTA;
-                       qctl.qc_id = 0;
+                       qctl->qc_id = 0;
                        goto quota_type_def;
                case 'p':
                        qtype = PRJQUOTA;
-                       rc = name2projid(&qctl.qc_id, optarg);
+                       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 (str2quotaid(&qctl->qc_id, optarg)) {
+                                       fprintf(stderr,
+                                               "%s setquota: invalid id '%s'\n",
+                                               progname, optarg);
+                                       rc = -1;
+                                       goto out;
                                }
                        }
 
-                       if (qctl.qc_id == 0) {
-                               fprintf(stderr, "%s setquota: can't set quota"
-                                       " for root usr/group/project.\n",
+                       if (qctl->qc_id == 0) {
+                               fprintf(stderr,
+                                       "%s setquota: can't set quota for root usr/group/project.\n",
                                        progname);
-                               return -1;
+                               rc = -1;
+                               goto out;
                        }
 
 quota_type_def:
-                       if (qctl.qc_type != ALLQUOTA) {
+                       if (qctl->qc_type != ALLQUOTA) {
                                fprintf(stderr,
-                                       "%s setquota: only one of -u, -U, -g,"
-                                       " -G, -p or -P may be specified\n",
+                                       "%s setquota: only one of -u, -U, -g, -G, -p or -P may be specified\n",
                                        progname);
-                               return CMD_HELP;
+                               rc = CMD_HELP;
+                               goto out;
                        }
-                       qctl.qc_type = qtype;
+                       qctl->qc_type = qtype;
                        break;
                case 'd':
-                       qctl.qc_cmd = LUSTRE_Q_SETDEFAULT;
+                       qctl->qc_cmd = LUSTRE_Q_SETDEFAULT;
                        use_default = true;
                        break;
                case 'b':
@@ -5798,9 +7314,9 @@ quota_type_def:
                        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,
+                                       "%s setquota: warning: block softlimit '%llu' smaller than minimum qunit size\nSee '%s help setquota' or Lustre manual for details\n",
+                                       progname,
+                                       (unsigned long long)dqb->dqb_bsoftlimit,
                                        progname);
                        break;
                case 'B':
@@ -5812,7 +7328,8 @@ quota_type_def:
                                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,
+                                       (unsigned long long)dqb->dqb_bhardlimit,
                                        progname);
                        break;
                case 'i':
@@ -5821,9 +7338,9 @@ quota_type_def:
                        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,
+                                       "%s setquota: warning: inode softlimit '%llu' smaller than minimum qunit size\nSee '%s help setquota' or Lustre manual for details\n",
+                                       progname,
+                                       (unsigned long long)dqb->dqb_isoftlimit,
                                        progname);
                        break;
                case 'I':
@@ -5832,57 +7349,71 @@ quota_type_def:
                        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,
+                                       "%s setquota: warning: inode hardlimit '%llu' smaller than minimum qunit size\nSee '%s help setquota' or Lustre manual for details\n",
+                                       progname,
+                                       (unsigned long long)dqb->dqb_ihardlimit,
                                        progname);
                        break;
+               case LFS_POOL_OPT:
+                       if (lfs_verify_poolarg(optarg)) {
+                               rc = -1;
+                               goto out;
+                       }
+                       fprintf(stdout,
+                               "Trying to set quota for pool %s\n", optarg);
+                       strncpy(qctl->qc_poolname, optarg, LOV_MAXPOOLNAME);
+                       qctl->qc_cmd  = LUSTRE_Q_SETQUOTAPOOL;
+                       break;
                default:
                        fprintf(stderr,
                                "%s setquota: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
-                       return CMD_HELP;
+                       rc = CMD_HELP;
+                       goto out;
                }
        }
 
-       if (qctl.qc_type == ALLQUOTA) {
+       if (qctl->qc_type == ALLQUOTA) {
                fprintf(stderr,
                        "%s setquota: either -u or -g must be specified\n",
                        progname);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
        if (!use_default && limit_mask == 0) {
                fprintf(stderr,
                        "%s setquota: at least one limit must be specified\n",
                        progname);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
        if (use_default && limit_mask != 0) {
                fprintf(stderr,
-                       "%s setquota: limits should not be specified when"
-                       " using default quota\n",
+                       "%s setquota: limits should not be specified when using default quota\n",
                        progname);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
-       if (use_default && qctl.qc_id == 0) {
+       if (use_default && qctl->qc_id == 0) {
                fprintf(stderr,
-                       "%s setquota: can not set default quota for root"
-                       " user/group/project\n",
+                       "%s setquota: can not set default quota for root user/group/project\n",
                        progname);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
        if (optind != argc - 1) {
                fprintf(stderr,
                        "%s setquota: filesystem not specified or unexpected argument '%s'\n",
                        progname, argv[optind]);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
-        mnt = argv[optind];
+       mnt = argv[optind];
 
        if (use_default) {
                dqb->dqb_bhardlimit = 0;
@@ -5896,12 +7427,12 @@ quota_type_def:
                   (!(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};
+                                              .qc_type = qctl->qc_type,
+                                              .qc_id   = qctl->qc_id};
 
                rc = llapi_quotactl(mnt, &tmp_qctl);
                if (rc < 0)
-                       return rc;
+                       goto out;
 
                if (!(limit_mask & BHLIMIT))
                        dqb->dqb_bhardlimit = tmp_qctl.qc_dqblk.dqb_bhardlimit;
@@ -5927,17 +7458,17 @@ quota_type_def:
        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);
+       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;
+                               obd_uuid2str(&qctl->obd_uuid), strerror(-rc));
        }
-
-       return 0;
+out:
+       free(qctl);
+       return rc;
 }
 
 /* Converts seconds value into format string
@@ -5947,52 +7478,52 @@ quota_type_def:
  *        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)
+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;
+       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];
+       for (i = ARRAY_SIZE(mult) - 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]);
+               if (c > 0 || (i == 0 && buf == tail))
+                       tail += scnprintf(tail, 40-(tail-buf), "%lu%c", c,
+                                         spec[i]);
 
-                seconds %= mult[i];
-        }
+               seconds %= mult[i];
+       }
 
-        return tail;
+       return tail;
 }
 
 static void sec2str(time_t seconds, char *buf, int rc)
 {
-        char *tail = buf;
+       char *tail = buf;
 
-        if (rc)
-                *tail++ = '[';
+       if (rc)
+               *tail++ = '[';
 
-        tail = __sec2str(seconds, tail);
+       tail = __sec2str(seconds, tail);
 
-        if (rc && tail - buf < 39) {
-                *tail++ = ']';
-                *tail++ = 0;
-        }
+       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);
+       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,
@@ -6045,6 +7576,7 @@ static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
        time(&now);
 
        if (qctl->qc_cmd == LUSTRE_Q_GETQUOTA || qctl->qc_cmd == Q_GETOQUOTA ||
+           qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL ||
            qctl->qc_cmd == LUSTRE_Q_GETDEFAULT) {
                int bover = 0, iover = 0;
                struct obd_dqblk *dqb = &qctl->qc_dqblk;
@@ -6054,26 +7586,23 @@ static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
 
                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) {
+                       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 {
+                       else
                                iover = 3;
-                       }
-                }
-
+               }
 
                if (strlen(mnt) > 15)
                        printf("%s\n%15s", mnt, "");
@@ -6084,7 +7613,7 @@ static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
                        diff2str(dqb->dqb_btime, timebuf, now);
                else if (show_default)
                        snprintf(timebuf, sizeof(timebuf), "%llu",
-                                dqb->dqb_btime);
+                                (unsigned long long)dqb->dqb_btime);
 
                kbytes2str(lustre_stoqb(dqb->dqb_curspace),
                           strbuf, sizeof(strbuf), h);
@@ -6112,12 +7641,11 @@ static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
                               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);
+                                (unsigned long long)dqb->dqb_itime);
 
                snprintf(numbuf[0], sizeof(numbuf),
                         (dqb->dqb_valid & QIF_INODES) ? "%ju" : "[%ju]",
@@ -6142,48 +7670,113 @@ static void print_quota(char *mnt, struct if_quotactl *qctl, int type,
                else
                        printf(" %7s %7s %7s %7s", "-", "-", "-", "-");
                printf("\n");
+       } else if (qctl->qc_cmd == LUSTRE_Q_GETINFO || LUSTRE_Q_GETINFOPOOL ||
+                  qctl->qc_cmd == Q_GETOINFO) {
+               char bgtimebuf[40];
+               char igtimebuf[40];
+
+               if (qctl->qc_dqinfo.dqi_bgrace == NOTIFY_GRACE_TIME)
+                       strncpy(bgtimebuf, NOTIFY_GRACE, 40);
+               else
+                       sec2str(qctl->qc_dqinfo.dqi_bgrace, bgtimebuf, rc);
+               if (qctl->qc_dqinfo.dqi_igrace == NOTIFY_GRACE_TIME)
+                       strncpy(igtimebuf, NOTIFY_GRACE, 40);
+               else
+                       sec2str(qctl->qc_dqinfo.dqi_igrace, igtimebuf, rc);
+
+               printf("Block grace time: %s; Inode grace time: %s\n",
+                      bgtimebuf, igtimebuf);
+       }
+}
+
+static int tgt_name2index(const char *tgtname, unsigned int *idx)
+{
+       char *dash, *endp;
+
+       /* format is "lustre-OST0001" */
+       dash = memchr(tgtname, '-', LUSTRE_MAXFSNAME + 1);
+       if (!dash) {
+               fprintf(stderr, "wrong tgtname format '%s'\n", tgtname);
+               return -EINVAL;
+       }
+       dash += 4;
 
-        } else if (qctl->qc_cmd == LUSTRE_Q_GETINFO ||
-                   qctl->qc_cmd == Q_GETOINFO) {
-                char bgtimebuf[40];
-                char igtimebuf[40];
+       *idx = strtoul(dash, &endp, 16);
+       if (*idx > 0xffff) {
+               fprintf(stderr, "wrong index %s\n", tgtname);
+               return -ERANGE;
+       }
 
-                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);
-        }
+       return 0;
 }
 
 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;
+       int rc = 0, rc1 = 0, count = 0, i = 0;
+       char **list = NULL, *buffer = NULL;
+       __u32 valid = qctl->qc_valid;
+
+       if (qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL && is_mdt)
+               return 0;
+
+       /* Is it correct for the case OST0000, OST0002, OST0003 -
+        * we will ask OST0001 that is absent and won't ask OST0003? */
+       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;
+       }
+
+       if (qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
+               char fname[PATH_MAX];
+               char fsname[LUSTRE_MAXFSNAME + 1];
+               int bufsize = sizeof(struct obd_uuid) * count;
+
+               rc = llapi_search_fsname(mnt, fsname);
+               if (rc) {
+                       fprintf(stderr, "cannot get fsname for mountpoint %s\n",
+                               mnt);
+                       goto out;
+               }
+               buffer = malloc(bufsize + sizeof(*list) * count);
+               if (!buffer)
+                       return -ENOMEM;
+               list = (char **)(buffer + bufsize);
+               snprintf(fname, PATH_MAX, "%s.%s", fsname, qctl->qc_poolname);
+               count = llapi_get_poolmembers(fname, list, count,
+                                             buffer, bufsize);
+               if (count <= 0)
+                       goto out;
+       }
+
+       for (i = 0; i < count; i++) {
+               if (qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
+                       unsigned int index;
 
-        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;
-        }
+                       if (tgt_name2index(list[i], &index))
+                               continue;
+                       qctl->qc_idx = index;
+               } else {
+                       qctl->qc_idx = i;
+               }
 
-        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) {
+               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;
-                        }
+                               rc = 0;
+                               goto out;
+                       }
 
-                        if (!rc1)
-                                rc1 = rc;
-                        fprintf(stderr, "quotactl %s%d failed.\n",
-                                is_mdt ? "mdt": "ost", qctl->qc_idx);
-                        continue;
-                }
+                       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);
@@ -6191,6 +7784,8 @@ static int print_obd_quota(char *mnt, struct if_quotactl *qctl, int is_mdt,
                                   qctl->qc_dqblk.dqb_bhardlimit;
        }
 out:
+       if (buffer)
+               free(buffer);
        qctl->qc_valid = valid;
        return rc ? : rc1;
 }
@@ -6249,6 +7844,7 @@ static int get_print_quota(char *mnt, char *name, struct if_quotactl *qctl,
        }
 
        if ((qctl->qc_cmd == LUSTRE_Q_GETQUOTA ||
+            qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL ||
             qctl->qc_cmd == LUSTRE_Q_GETDEFAULT) && !quiet)
                print_quota_title(name, qctl, human_readable, show_default);
 
@@ -6258,14 +7854,16 @@ static int get_print_quota(char *mnt, char *name, struct if_quotactl *qctl,
        if (qctl->qc_valid != QC_GENERAL)
                mnt = "";
 
-       inacc = (qctl->qc_cmd == LUSTRE_Q_GETQUOTA) &&
+       inacc = (qctl->qc_cmd == LUSTRE_Q_GETQUOTA ||
+                qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) &&
                ((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) {
+           qctl->qc_valid == QC_GENERAL && qctl->qc_cmd != LUSTRE_Q_GETINFO &&
+           qctl->qc_cmd != LUSTRE_Q_GETINFOPOOL) {
                char strbuf[STRBUF_LEN];
 
                rc2 = print_obd_quota(mnt, qctl, 1, human_readable,
@@ -6274,9 +7872,8 @@ static int get_print_quota(char *mnt, char *name, struct if_quotactl *qctl,
                                      &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);
+               printf("Total allocated inode limit: %ju, total allocated block limit: %s\n",
+                      (uintmax_t)total_ialloc, strbuf);
        }
 
        if (use_default_for_blk)
@@ -6288,12 +7885,18 @@ static int get_print_quota(char *mnt, char *name, struct if_quotactl *qctl,
                       *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");
+               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;
+       if (rc1)
+               return rc1;
+       if (rc2)
+               return rc2;
+       if (rc3)
+               return rc3;
+       if (inacc)
+               return -EIO;
 
+       return 0;
 }
 
 static int lfs_project(int argc, char **argv)
@@ -6350,7 +7953,13 @@ static int lfs_project(int argc, char **argv)
                        phc.recursive = true;
                        break;
                case 'p':
-                       phc.projid = strtoul(optarg, NULL, 0);
+                       if (str2quotaid(&phc.projid, optarg)) {
+                               fprintf(stderr,
+                                       "Invalid project ID: %s\n",
+                                       optarg);
+                               return CMD_HELP;
+                       }
+
                        phc.assign_projid = true;
 
                        break;
@@ -6454,17 +8063,27 @@ 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;
+       struct if_quotactl *qctl;
+       char *obd_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;
+       struct option long_opts[] = {
+       { .val = LFS_POOL_OPT, .name = "pool", .has_arg = required_argument },
+       { .name = NULL } };
+
+       qctl = calloc(1, sizeof(*qctl) + LOV_MAXPOOLNAME + 1);
+       if (!qctl)
+               return -ENOMEM;
+
+       qctl->qc_cmd = LUSTRE_Q_GETQUOTA;
+       qctl->qc_type = ALLQUOTA;
+       obd_uuid = (char *)qctl->obd_uuid.uuid;
 
-       while ((c = getopt(argc, argv, "gGi:I:o:pPqtuUvh")) != -1) {
+       while ((c = getopt_long(argc, argv, "gGi:I:o:pPqtuUvh",
+               long_opts, NULL)) != -1) {
                switch (c) {
                case 'U':
                        show_default = true;
@@ -6481,183 +8100,211 @@ static int lfs_quota(int argc, char **argv)
                case 'p':
                        qtype = PRJQUOTA;
 quota_type:
-                       if (qctl.qc_type != ALLQUOTA) {
+                       if (qctl->qc_type != ALLQUOTA) {
                                fprintf(stderr,
                                        "%s quota: only one of -u, -g, or -p may be specified\n",
                                        progname);
-                               return CMD_HELP;
+                               rc = CMD_HELP;
+                               goto out;
                        }
-                       qctl.qc_type = qtype;
+                       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(*obd_uuid), "%s", optarg);
                        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);
+                       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;
+                               rc = CMD_HELP;
+                               goto out;
                        }
                        break;
                case 'I':
-                       valid = qctl.qc_valid = QC_OSTIDX;
-                       idx = qctl.qc_idx = atoi(optarg);
+                       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;
+                               rc = CMD_HELP;
+                               goto out;
                        }
                        break;
-                case 'v':
-                        verbose = 1;
-                        break;
-                case 'q':
-                        quiet = 1;
-                        break;
+               case 'v':
+                       verbose = 1;
+                       break;
+               case 'q':
+                       quiet = 1;
+                       break;
                case 'h':
                        human_readable = true;
                        break;
+               case LFS_POOL_OPT:
+                       if (lfs_verify_poolarg(optarg)) {
+                               rc = -1;
+                               goto out;
+                       }
+                       strncpy(qctl->qc_poolname, optarg, LOV_MAXPOOLNAME);
+                       qctl->qc_cmd = qctl->qc_cmd == LUSTRE_Q_GETINFO ?
+                                               LUSTRE_Q_GETINFOPOOL :
+                                               LUSTRE_Q_GETQUOTAPOOL;
+                       break;
                default:
                        fprintf(stderr, "%s quota: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
-                       return CMD_HELP;
+                       rc = CMD_HELP;
+                       goto out;
                }
        }
 
-        /* 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;
+       /* current uid/gid info for "lfs quota /path/to/lustre/mount" */
+       if ((qctl->qc_cmd == LUSTRE_Q_GETQUOTA ||
+            qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) &&
+            qctl->qc_type == ALLQUOTA &&
+            optind == argc - 1 && !show_default) {
+               qctl->qc_idx = idx;
 
                for (qtype = USRQUOTA; qtype <= GRPQUOTA; qtype++) {
-                       qctl.qc_type = qtype;
+                       qctl->qc_type = qtype;
+                       qctl->qc_valid = valid;
                        if (qtype == USRQUOTA) {
-                               qctl.qc_id = geteuid();
-                               rc = uid2name(&name, qctl.qc_id);
+                               qctl->qc_id = geteuid();
+                               rc = uid2name(&name, qctl->qc_id);
                        } else {
-                               qctl.qc_id = getegid();
-                               rc = gid2name(&name, qctl.qc_id);
+                               qctl->qc_id = getegid();
+                               rc = gid2name(&name, qctl->qc_id);
+                               memset(&qctl->qc_dqblk, 0,
+                                      sizeof(qctl->qc_dqblk));
                        }
                        if (rc)
                                name = "<unknown>";
                        mnt = argv[optind];
-                       rc1 = get_print_quota(mnt, name, &qctl, verbose, quiet,
+                       rc1 = get_print_quota(mnt, name, qctl, verbose, quiet,
                                              human_readable, show_default);
                        if (rc1 && !rc)
                                rc = rc1;
                }
-               return rc;
+               goto out;
        /* lfs quota -u username /path/to/lustre/mount */
-       } else if (qctl.qc_cmd == LUSTRE_Q_GETQUOTA) {
+       } else if (qctl->qc_cmd == LUSTRE_Q_GETQUOTA ||
+                  qctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
                /* 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) {
+                   qctl->qc_type == ALLQUOTA) {
                        fprintf(stderr,
                                "%s quota: name and mount point must be specified\n",
                                progname);
-                       return CMD_HELP;
+                       rc = CMD_HELP;
+                       goto out;
                }
 
                if (!show_default) {
                        name = argv[optind++];
-                       switch (qctl.qc_type) {
+                       switch (qctl->qc_type) {
                        case USRQUOTA:
-                               rc = name2uid(&qctl.qc_id, name);
+                               rc = name2uid(&qctl->qc_id, name);
                                break;
                        case GRPQUOTA:
-                               rc = name2gid(&qctl.qc_id, name);
+                               rc = name2gid(&qctl->qc_id, name);
                                break;
                        case PRJQUOTA:
-                               rc = name2projid(&qctl.qc_id, name);
+                               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;
+                       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') {
+                       if (str2quotaid(&qctl->qc_id, name)) {
                                fprintf(stderr, "%s quota: invalid id '%s'\n",
                                        progname, name);
-                               return CMD_HELP;
+                               rc = CMD_HELP;
+                               goto out;
                        }
                }
-       } else if (optind + 1 != argc || qctl.qc_type == ALLQUOTA) {
+       } else if (optind + 1 != argc || qctl->qc_type == ALLQUOTA) {
                fprintf(stderr, "%s quota: missing quota info argument(s)\n",
                        progname);
-               return CMD_HELP;
+               rc = CMD_HELP;
+               goto out;
        }
 
        mnt = argv[optind];
-       rc = get_print_quota(mnt, name, &qctl, verbose, quiet,
+       rc = get_print_quota(mnt, name, qctl, verbose, quiet,
                             human_readable, show_default);
+out:
+       free(qctl);
        return rc;
 }
 #endif /* HAVE_SYS_QUOTA_H! */
 
 static int flushctx_ioctl(char *mp)
 {
-        int fd, rc;
+       int fd, rc;
 
-        fd = open(mp, O_RDONLY);
-        if (fd == -1) {
-                fprintf(stderr, "flushctx: error open %s: %s\n",
-                        mp, strerror(errno));
-                return -1;
-        }
+       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));
+       rc = ioctl(fd, LL_IOC_FLUSHCTX);
+       if (rc == -1)
+               fprintf(stderr, "flushctx: error ioctl %s: %s\n",
+                       mp, strerror(errno));
 
-        close(fd);
-        return rc;
+       close(fd);
+       return rc;
 }
 
 static int lfs_flushctx(int argc, char **argv)
 {
-       int     kdestroy = 0, c;
+       int     kdestroy = 0, reap = 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);
-            }
-        }
+       while ((c = getopt(argc, argv, "kr")) != -1) {
+               switch (c) {
+               case 'k':
+                       kdestroy = 1;
+                       break;
+               case 'r':
+                       reap = 1;
+                       break;
+               default:
+                       fprintf(stderr,
+                               "error: %s: option '-%c' unrecognized\n",
+                               argv[0], c);
+                       return CMD_HELP;
+               }
+       }
+
+       if (kdestroy) {
+               rc = system("kdestroy > /dev/null");
+               if (rc) {
+                       rc = WEXITSTATUS(rc);
+                       fprintf(stderr,
+                               "error destroying tickets: %d, continuing\n",
+                               rc);
+               }
+       }
 
        if (optind >= argc) {
                /* flush for all mounted lustre fs. */
@@ -6671,28 +8318,23 @@ static int lfs_flushctx(int argc, char **argv)
 
                        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;
-}
+       } else {
+               /* flush fs as specified */
+               while (optind < argc) {
+                       if (flushctx_ioctl(argv[optind++]))
+                               rc = -1;
+               }
+       }
 
-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;
-}
+       if (reap) {
+               rc = system("keyctl reap > /dev/null");
+               if (rc != 0) {
+                       rc = WEXITSTATUS(rc);
+                       fprintf(stderr, "error reaping keyring: %d\n", rc);
+               }
+       }
 
-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;
+       return rc;
 }
 
 static int lfs_changelog(int argc, char **argv)
@@ -6709,28 +8351,45 @@ static int lfs_changelog(int argc, char **argv)
 
        while ((rc = getopt_long(argc, argv, short_opts,
                long_opts, NULL)) != -1) {
-                switch (rc) {
-                case 'f':
-                        follow++;
-                        break;
-                default:
+               switch (rc) {
+               case 'f':
+                       follow++;
+                       break;
+               default:
                        fprintf(stderr,
                                "%s changelog: unrecognized option '%s'\n",
                                progname, argv[optind - 1]);
-                        return CMD_HELP;
-                }
-        }
+                       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);
+       mdd = argv[optind++];
+       if (argc > optind) {
+               errno = 0;
+               startrec = strtoll(argv[optind++], NULL, 10);
+               if (errno != 0 || startrec < 0) {
+                       fprintf(stderr,
+                               "%s changelog: bad startrec\n",
+                               progname);
+                       return CMD_HELP;
+               }
+       }
+
+       if (argc > optind) {
+               errno = 0;
+               endrec = strtoll(argv[optind++], NULL, 10);
+               if (errno != 0 || endrec < 0) {
+                       fprintf(stderr,
+                               "%s changelog: bad endrec\n",
+                               progname);
+                       return CMD_HELP;
+               }
+       }
 
        rc = llapi_changelog_start(&changelog_priv,
                                   CHANGELOG_FLAG_BLOCK |
@@ -6791,14 +8450,16 @@ static int lfs_changelog(int argc, char **argv)
                        struct changelog_ext_extra_flags *ef =
                                changelog_rec_extra_flags(rec);
 
-                       printf(" ef=0x%llx", ef->cr_extra_flags);
+                       printf(" ef=0x%llx",
+                              (unsigned long long)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);
+                                      (unsigned long long)uidgid->cr_uid,
+                                      (unsigned long long)uidgid->cr_gid);
                        }
                        if (ef->cr_extra_flags & CLFE_NID) {
                                struct changelog_ext_nid *nid =
@@ -6828,7 +8489,6 @@ static int lfs_changelog(int argc, char **argv)
 
                                if (strcmp(mode, "---") != 0)
                                        printf(" m=%s", mode);
-
                        }
 
                        if (ef->cr_extra_flags & CLFE_XATTR) {
@@ -6840,9 +8500,11 @@ static int lfs_changelog(int argc, char **argv)
                        }
                }
 
+               if (!fid_is_zero(&rec->cr_pfid))
+                       printf(" p="DFID, PFID(&rec->cr_pfid));
                if (rec->cr_namelen)
-                       printf(" p="DFID" %.*s", PFID(&rec->cr_pfid),
-                              rec->cr_namelen, changelog_rec_name(rec));
+                       printf(" %.*s", rec->cr_namelen,
+                              changelog_rec_name(rec));
 
                if (rec->cr_flags & CLF_RENAME) {
                        struct changelog_ext_rename *rnm =
@@ -6877,7 +8539,14 @@ static int lfs_changelog_clear(int argc, char **argv)
        if (argc != 4)
                return CMD_HELP;
 
+       errno = 0;
        endrec = strtoll(argv[3], NULL, 10);
+       if (errno != 0 || endrec < 0) {
+               fprintf(stderr,
+                       "%s: bad endrec '%s'\n",
+                       argv[0], argv[3]);
+               return CMD_HELP;
+       }
 
        rc = llapi_changelog_clear(argv[1], argv[2], endrec);
 
@@ -6897,31 +8566,49 @@ static int lfs_changelog_clear(int argc, char **argv)
        return rc;
 }
 
+static void rstripc(char *str, int c)
+{
+       char *end = str + strlen(str);
+
+       for (; str < end && end[-1] == c; --end)
+               end[-1] = '\0';
+}
+
 static int lfs_fid2path(int argc, char **argv)
 {
        struct option long_opts[] = {
                { .val = 'c',   .name = "cur",  .has_arg = no_argument },
+               { .val = 'c',   .name = "current",      .has_arg = no_argument },
+               { .val = 'c',   .name = "print-link",   .has_arg = no_argument },
+               { .val = 'f',   .name = "print-fid",    .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;
+       char short_opts[] = "cfl:pr:";
+       bool print_link = false;
+       bool print_fid = false;
+       bool print_mnt_dir;
+       char mnt_dir[PATH_MAX] = "";
+       int mnt_fd = -1;
+       char *path_or_fsname;
        long long recno = -1;
        int linkno = -1;
-       int lnktmp;
-       int printcur = 0;
-       int rc = 0;
        char *endptr = NULL;
+       int rc = 0;
+       int c;
+       int i;
 
-       while ((rc = getopt_long(argc, argv, short_opts,
-               long_opts, NULL)) != -1) {
-               switch (rc) {
+       while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
+               switch (c) {
                case 'c':
-                       printcur++;
+                       print_link = true;
+                       break;
+               case 'f':
+                       print_fid = true;
                        break;
                case 'l':
+                       errno = 0;
                        linkno = strtol(optarg, &endptr, 10);
-                       if (*endptr != '\0') {
+                       if (errno != 0 || *endptr != '\0' || linkno < 0) {
                                fprintf(stderr,
                                        "%s fid2path: invalid linkno '%s'\n",
                                        progname, optarg);
@@ -6929,8 +8616,13 @@ static int lfs_fid2path(int argc, char **argv)
                        }
                        break;
                case 'r':
+                       /* recno is something to do with changelogs
+                        * that was never implemented. We just pass it
+                        * through for the MDT to ignore.
+                        */
+                       errno = 0;
                        recno = strtoll(optarg, &endptr, 10);
-                       if (*endptr != '\0') {
+                       if (errno != 0 || *endptr != '\0' || recno < 0) {
                                fprintf(stderr,
                                        "%s fid2path: invalid recno '%s'\n",
                                        progname, optarg);
@@ -6945,64 +8637,110 @@ static int lfs_fid2path(int argc, char **argv)
                }
        }
 
-       if (argc < 3) {
+       if (argc - optind < 2) {
                fprintf(stderr,
-                       "%s fid2path: <fsname|rootpath> and <fid>... must be specified\n",
+                       "Usage: %s fid2path FSNAME|ROOT FID...\n",
                        progname);
                return CMD_HELP;
        }
 
-       device = argv[optind++];
-       path = calloc(1, PATH_MAX);
-       if (path == NULL) {
-               rc = -errno;
+       path_or_fsname = argv[optind];
+
+       if (*path_or_fsname == '/') {
+               print_mnt_dir = true;
+               rc = llapi_search_mounts(path_or_fsname, 0, mnt_dir, NULL);
+       } else {
+               print_mnt_dir = false;
+               rc = llapi_search_rootpath(mnt_dir, path_or_fsname);
+       }
+
+       if (rc < 0) {
                fprintf(stderr,
-                       "%s fid2path: cannot allocate memory for path: %s\n",
-                       progname, strerror(-rc));
-               return rc;
+                       "%s fid2path: cannot resolve mount point for '%s': %s\n",
+                       progname, path_or_fsname, strerror(-rc));
+               goto out;
        }
 
-       rc = 0;
-       while (optind < argc) {
-               fid = argv[optind++];
+       mnt_fd = open(mnt_dir, O_RDONLY | O_DIRECTORY);
+       if (mnt_fd < 0) {
+               fprintf(stderr,
+                       "%s fid2path: cannot open mount point for '%s': %s\n",
+                       progname, path_or_fsname, strerror(-rc));
+               goto out;
+       }
+
+       /* Strip trailing slashes from mnt_dir. */
+       rstripc(mnt_dir + 1, '/');
+
+       for (i = optind + 1; i < argc; i++) {
+               const char *fid_str = argv[i];
+               struct lu_fid fid;
+               int rc2;
+
+               rc2 = llapi_fid_parse(fid_str, &fid, NULL);
+               if (rc2 < 0) {
+                       fprintf(stderr,
+                               "%s fid2path: invalid FID '%s'\n",
+                               progname, fid_str);
+                       if (rc == 0)
+                               rc = rc2;
+
+                       continue;
+               }
 
-               lnktmp = (linkno >= 0) ? linkno : 0;
+               int linktmp = (linkno >= 0) ? linkno : 0;
                while (1) {
-                       int oldtmp = lnktmp;
+                       int oldtmp = linktmp;
                        long long rectmp = recno;
-                       int rc2;
-                       rc2 = llapi_fid2path(device, fid, path, PATH_MAX,
-                                            &rectmp, &lnktmp);
+                       char path_buf[PATH_MAX];
+
+                       rc2 = llapi_fid2path_at(mnt_fd, &fid,
+                               path_buf, sizeof(path_buf), &rectmp, &linktmp);
                        if (rc2 < 0) {
                                fprintf(stderr,
-                                       "%s fid2path: cannot find '%s': %s\n",
-                                       progname, fid, strerror(errno = -rc2));
+                                       "%s fid2path: cannot find %s %s: %s\n",
+                                       progname, path_or_fsname, fid_str,
+                                       strerror(-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 (print_fid)
+                               printf("%s ", fid_str);
+
+                       if (print_link)
+                               printf("%d ", linktmp);
+
+                       /* You may think this looks wrong or weird (and it is!)
+                        * but we are actually trying to preserve the old quirky
+                        * behaviors (enforced by our old quirky tests!) that
+                        * make lfs so much fun to work on:
+                        *
+                        *   lustre 0x200000007:0x1:0x0 => "/"
+                        *   /mnt/lustre 0x200000007:0x1:0x0 => "/mnt/lustre//"
+                        *
+                        * Note that llapi_fid2path() returns "" for the root
+                        * FID. */
+
+                       printf("%s%s%s\n",
+                              print_mnt_dir ? mnt_dir : "",
+                              (print_mnt_dir || *path_buf == '\0') ? "/" : "",
+                              path_buf);
 
                        if (linkno >= 0)
                                /* specified linkno */
                                break;
-                       if (oldtmp == lnktmp)
+
+                       if (oldtmp == linktmp)
                                /* no more links */
                                break;
                }
        }
+out:
+       if (!(mnt_fd < 0))
+               close(mnt_fd);
 
-       free(path);
        return rc;
 }
 
@@ -7036,13 +8774,14 @@ static int lfs_path2fid(int argc, char **argv)
                fprintf(stderr, "%s path2fid: FILE... must be specified\n",
                        progname);
                return CMD_HELP;
-       }
-       else if (optind < argc - 1)
+       } 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)
@@ -7085,6 +8824,86 @@ static int lfs_path2fid(int argc, char **argv)
        return rc;
 }
 
+#define MAX_ERRNO      4095
+#define IS_ERR_VALUE(x) ((unsigned long)(x) >= (unsigned long)-MAX_ERRNO)
+
+static int lfs_rmfid_and_show_errors(const char *device, struct fid_array *fa)
+{
+       int rc, rc2, k;
+
+       rc = llapi_rmfid(device, fa);
+       if (rc < 0) {
+               fprintf(stderr, "%s rmfid: cannot remove FIDs: %s\n",
+                       progname, strerror(-rc));
+               return rc;
+       }
+
+       for (k = 0; k < fa->fa_nr; k++) {
+               rc2 = (__s32)fa->fa_fids[k].f_ver;
+               if (!IS_ERR_VALUE(rc2))
+                       continue;
+
+               if (rc == 0)
+                       rc = rc2;
+
+               fa->fa_fids[k].f_ver = 0;
+               fprintf(stderr, "%s rmfid: cannot remove "DFID": %s\n",
+                       progname, PFID(&fa->fa_fids[k]), strerror(-rc2));
+       }
+
+       return rc;
+}
+
+static int lfs_rmfid(int argc, char **argv)
+{
+       char *fidstr, *device;
+       int rc = 0, rc2, nr;
+       struct fid_array *fa;
+
+       if (optind > argc - 1) {
+               fprintf(stderr, "%s rmfid: missing dirname\n", progname);
+               return CMD_HELP;
+       }
+
+       device = argv[optind++];
+
+       nr = argc - optind;
+       fa = malloc(offsetof(struct fid_array, fa_fids[nr + 1]));
+       if (!fa)
+               return -ENOMEM;
+
+       fa->fa_nr = 0;
+       rc = 0;
+       while (optind < argc) {
+               int found;
+
+               fidstr = argv[optind++];
+               while (*fidstr == '[')
+                       fidstr++;
+               found = sscanf(fidstr, SFID, RFID(&fa->fa_fids[fa->fa_nr]));
+               if (found != 3) {
+                       fprintf(stderr, "unrecognized FID: %s\n",
+                               argv[optind - 1]);
+                       exit(1);
+               }
+               fa->fa_nr++;
+               if (fa->fa_nr == OBD_MAX_FIDS_IN_ARRAY) {
+                       /* start another batch */
+                       rc2 = lfs_rmfid_and_show_errors(device, fa);
+                       if (rc2 && !rc)
+                               rc = rc2;
+                       fa->fa_nr = 0;
+               }
+       }
+       if (fa->fa_nr) {
+               rc2 = lfs_rmfid_and_show_errors(device, fa);
+               if (rc2 && !rc)
+                       rc = rc2;
+       }
+
+       return rc;
+}
+
 static int lfs_data_version(int argc, char **argv)
 {
        char *path;
@@ -7245,8 +9064,9 @@ static int lfs_hsm_change_flags(int argc, char **argv, int mode)
                        mask |= HS_EXISTS;
                        break;
                case 'i':
+                       errno = 0;
                        archive_id = strtol(optarg, &end, 10);
-                       if (*end != '\0') {
+                       if (errno != 0 || *end != '\0' || archive_id < 0) {
                                fprintf(stderr, "invalid archive_id: '%s'\n",
                                        end);
                                return CMD_HELP;
@@ -7266,7 +9086,6 @@ static int lfs_hsm_change_flags(int argc, char **argv, int mode)
                return CMD_HELP;
 
        while (optind < argc) {
-
                path = argv[optind];
 
                /* If mode == 0, this means we apply the mask. */
@@ -7369,7 +9188,8 @@ static int lfs_hsm_prepare_file(const char *file, struct lu_fid *fid,
                fprintf(stderr, "Cannot stat %s: %s\n", file, strerror(errno));
                return -errno;
        }
-       /* Checking for regular file as archiving as posix copytool
+       /*
+        * Checking for regular file as archiving as posix copytool
         * rejects archiving files other than regular files
         */
        if (!S_ISREG(st.st_mode)) {
@@ -7378,8 +9198,9 @@ static int lfs_hsm_prepare_file(const char *file, struct lu_fid *fid,
        }
        /* 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);
+               fprintf(stderr,
+                       "All files should be on the same filesystem: %s\n",
+                       file);
                return -EINVAL;
        }
        *last_dev = st.st_dev;
@@ -7417,17 +9238,11 @@ static int fill_hur_item(struct hsm_user_request *hur, unsigned int idx,
 
        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 {
+       if (mntpath) {
+               rc = llapi_fid_parse(fname, &hui->hui_fid, NULL);
+               if (rc)
                        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);
        }
@@ -7446,23 +9261,23 @@ static int lfs_hsm_request(int argc, char **argv, int action)
        { .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;
+       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;
@@ -7480,14 +9295,13 @@ static int lfs_hsm_request(int argc, char **argv, int action)
                        if (action != HUA_ARCHIVE &&
                            action != HUA_REMOVE) {
                                fprintf(stderr,
-                                       "error: -a is supported only "
-                                       "when archiving or removing\n");
+                                       "error: -a is supported only when archiving or removing\n");
                                return CMD_HELP;
                        }
                        archive_id = atoi(optarg);
                        break;
                case 'm':
-                       if (some_file == NULL) {
+                       if (!some_file) {
                                mntpath = optarg;
                                some_file = strdup(optarg);
                        }
@@ -7504,16 +9318,18 @@ static int lfs_hsm_request(int argc, char **argv, int action)
        /* All remaining args are files, so we have at least nbfile */
        nbfile = argc - optind;
 
-       if ((nbfile == 0) && (filelist == NULL))
+       if ((nbfile == 0) && (!filelist))
                return CMD_HELP;
 
-       if (opaque != NULL)
+       if (opaque)
                opaque_len = strlen(opaque);
 
-       /* Alloc the request structure with enough place to store all files
-        * from command line. */
+       /*
+        * 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) {
+       if (!hur) {
                fprintf(stderr, "Cannot create the request: %s\n",
                        strerror(errno));
                return errno;
@@ -7538,9 +9354,9 @@ static int lfs_hsm_request(int argc, char **argv, int action)
        /* 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) {
+       if (filelist) {
                fp = fopen(filelist, "r");
-               if (fp == NULL) {
+               if (!fp) {
                        fprintf(stderr, "Cannot read the file list %s: %s\n",
                                filelist, strerror(errno));
                        rc = -errno;
@@ -7548,8 +9364,10 @@ static int lfs_hsm_request(int argc, char **argv, int action)
                }
 
                while ((rc = getline(&line, &len, fp)) != -1) {
-                       /* If allocated buffer was too small, get something
-                        * larger */
+                       /*
+                        * If allocated buffer was too small, get something
+                        * larger
+                        */
                        if (nbfile_alloc <= hur->hur_request.hr_itemcount) {
                                ssize_t size;
 
@@ -7557,9 +9375,9 @@ static int lfs_hsm_request(int argc, char **argv, int action)
                                oldhur = hur;
                                hur = llapi_hsm_user_request_alloc(nbfile_alloc,
                                                                   opaque_len);
-                               if (hur == NULL) {
-                                       fprintf(stderr, "hsm: cannot allocate "
-                                               "the request: %s\n",
+                               if (!hur) {
+                                       fprintf(stderr,
+                                               "hsm: cannot allocate the request: %s\n",
                                                strerror(errno));
                                        hur = oldhur;
                                        rc = -errno;
@@ -7568,10 +9386,10 @@ static int lfs_hsm_request(int argc, char **argv, int action)
                                }
                                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);
+                                       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;
@@ -7593,7 +9411,7 @@ static int lfs_hsm_request(int argc, char **argv, int action)
                                goto out_free;
                        }
 
-                       if (some_file == NULL) {
+                       if (!some_file) {
                                some_file = line;
                                line = NULL;
                        }
@@ -7605,7 +9423,7 @@ static int lfs_hsm_request(int argc, char **argv, int action)
 
        /* If a --data was used, add it to the request */
        hur->hur_request.hr_data_len = opaque_len;
-       if (opaque != NULL)
+       if (opaque)
                memcpy(hur_data(hur), opaque, opaque_len);
 
        /* Send the HSM request */
@@ -7726,8 +9544,9 @@ static int lfs_ladvise(int argc, char **argv)
                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,
+                                       "%s: invalid advice type '%s'\n",
+                                       argv[0], optarg);
                                fprintf(stderr, "Valid types:");
 
                                for (advice_type = 0;
@@ -7764,8 +9583,9 @@ static int lfs_ladvise(int argc, char **argv)
                        rc = llapi_parse_size(optarg, &start,
                                              &size_units, 0);
                        if (rc) {
-                               fprintf(stderr, "%s: bad start offset "
-                                       "'%s'\n", argv[0], optarg);
+                               fprintf(stderr,
+                                       "%s: bad start offset '%s'\n",
+                                       argv[0], optarg);
                                return CMD_HELP;
                        }
                        break;
@@ -7782,8 +9602,8 @@ static int lfs_ladvise(int argc, char **argv)
                case 'm':
                        mode = lfs_get_mode(optarg);
                        if (mode < 0) {
-                               fprintf(stderr, "%s: bad mode '%s', valid "
-                                                "modes are READ or WRITE\n",
+                               fprintf(stderr,
+                                       "%s: bad mode '%s', valid modes are READ or WRITE\n",
                                        argv[0], optarg);
                                return CMD_HELP;
                        }
@@ -7811,9 +9631,9 @@ static int lfs_ladvise(int argc, char **argv)
        }
 
        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]);
+               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;
        }
 
@@ -7851,8 +9671,147 @@ static int lfs_ladvise(int argc, char **argv)
        }
 
        while (optind < argc) {
-               int rc2;
-
+               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;
+}
+
+static const char *const heat_names[] = LU_HEAT_NAMES;
+
+static int lfs_heat_get(int argc, char **argv)
+{
+       struct lu_heat *heat;
+       int rc = 0, rc2;
+       char *path;
+       int fd;
+       int i;
+
+       if (argc <= 1)
+               return CMD_HELP;
+
+       heat = calloc(sizeof(*heat) + sizeof(__u64) * OBD_HEAT_COUNT, 1);
+       if (!heat) {
+               fprintf(stderr, "%s: memory allocation failed\n", argv[0]);
+               return -ENOMEM;
+       }
+
+       optind = 1;
+       while (optind < argc) {
+               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;
+               }
+
+               heat->lh_count = OBD_HEAT_COUNT;
+               rc2 = llapi_heat_get(fd, heat);
+               close(fd);
+               if (rc2 < 0) {
+                       fprintf(stderr,
+                               "%s: cannot get heat of file '%s': %s\n",
+                               argv[0], path, strerror(errno));
+                       goto next;
+               }
+
+               printf("flags: %x\n", heat->lh_flags);
+               for (i = 0; i < heat->lh_count; i++)
+                       printf("%s: %llu\n", heat_names[i],
+                              (unsigned long long)heat->lh_heat[i]);
+next:
+               if (rc == 0 && rc2 < 0)
+                       rc = rc2;
+       }
+
+       free(heat);
+       return rc;
+}
+
+static int lfs_heat_set(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'c',   .name = "clear",        .has_arg = no_argument },
+       { .val = 'o',   .name = "off",          .has_arg = no_argument },
+       { .val = 'O',   .name = "on",           .has_arg = no_argument },
+       { .name = NULL } };
+       enum lu_heat_flag flags = 0;
+       int rc = 0, rc2;
+       char *path;
+       int fd;
+       int c;
+
+       if (argc <= 1)
+               return CMD_HELP;
+
+       optind = 0;
+       while ((c = getopt_long(argc, argv, "coO", long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'c':
+                       flags |= LU_HEAT_FLAG_CLEAR;
+                       break;
+               case 'o':
+                       flags |= LU_HEAT_FLAG_CLEAR;
+                       flags |= LU_HEAT_FLAG_OFF;
+                       break;
+               case 'O':
+                       flags &= ~LU_HEAT_FLAG_OFF;
+                       break;
+               case '?':
+                       return CMD_HELP;
+               default:
+                       fprintf(stderr, "%s: option '%s' unrecognized\n",
+                               argv[0], argv[optind - 1]);
+                       return CMD_HELP;
+               }
+       }
+
+       if (argc <= optind) {
+               fprintf(stderr, "%s: please give one or more file names\n",
+                       argv[0]);
+               return CMD_HELP;
+       }
+
+       while (optind < argc) {
                path = argv[optind++];
 
                fd = open(path, O_RDONLY);
@@ -7863,29 +9822,14 @@ static int lfs_ladvise(int argc, char **argv)
                        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);
+               rc2 = llapi_heat_set(fd, flags);
                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));
-
+                       fprintf(stderr,
+                               "%s: cannot setflags heat of file '%s': %s\n",
+                               argv[0], path, strerror(errno));
                        goto next;
                }
-
 next:
                if (rc == 0 && rc2 < 0)
                        rc = rc2;
@@ -7893,7 +9837,8 @@ next:
        return rc;
 }
 
-/** The input string contains a comma delimited list of component ids and
+/**
+ * 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)
@@ -7903,7 +9848,7 @@ static int parse_mirror_ids(__u16 *ids, int size, char *arg)
        int nr = 0;
        int rc;
 
-       if (arg == NULL)
+       if (!arg)
                return -EINVAL;
 
        while (!end_of_loop) {
@@ -7955,7 +9900,7 @@ static int parse_mirror_ids(__u16 *ids, int size, char *arg)
                arg = ++ptr;
                rc = 0;
        }
-       if (!end_of_loop && ptr != NULL)
+       if (!end_of_loop && ptr)
                *ptr = ',';
 
        return rc < 0 ? rc : nr;
@@ -8066,7 +10011,7 @@ int verify_mirror_ids(const char *fname, __u16 *mirror_ids, int ids_nr)
        }
 
        layout = llapi_layout_get_by_fd(fd, 0);
-       if (layout == NULL) {
+       if (!layout) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
@@ -8140,6 +10085,7 @@ int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
        int idx;
        int fd;
        int rc;
+       int rc2;
 
        if (stat(fname, &stbuf) < 0) {
                fprintf(stderr, "%s: cannot stat file '%s': %s.\n",
@@ -8163,7 +10109,7 @@ int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
        }
 
        layout = llapi_layout_get_by_fd(fd, 0);
-       if (layout == NULL) {
+       if (!layout) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
@@ -8204,7 +10150,7 @@ int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
                else
                        fprintf(stderr,
                            "%s: '%s' llapi_lease_get_ext resync failed: %s.\n",
-                               progname, fname, strerror(errno));
+                               progname, fname, strerror(-rc));
                goto free_layout;
        }
 
@@ -8228,10 +10174,10 @@ int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
        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);
+               fprintf(stderr, "%s: '%s' llapi_mirror_resync_many: %s.\n",
+                       progname, fname, strerror(-rc));
 
-       /* prepare ioc for lease put */
+       /* need to do the lease unlock even resync fails */
        ioc->lil_mode = LL_LEASE_UNLCK;
        ioc->lil_flags = LL_LEASE_RESYNC_DONE;
        ioc->lil_count = 0;
@@ -8242,19 +10188,19 @@ int lfs_mirror_resync_file(const char *fname, struct ll_ioc_lease *ioc,
                }
        }
 
-       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;
-       }
+       rc2 = llapi_lease_set(fd, ioc);
        /**
         * llapi_lease_set returns lease mode when it request to unlock
-        * the lease lock
+        * the lease lock.
         */
-       rc = 0;
+       if (rc2 <= 0) {
+               /* rc2 == 0 means lost lease lock */
+               if (rc2 == 0 && rc == 0)
+                       rc = -EBUSY;
+               fprintf(stderr, "%s: resync file '%s' failed: %s.\n",
+                       progname, fname,
+                       rc2 == 0 ? "lost lease lock" : strerror(-rc2));
+       }
 
 free_layout:
        llapi_layout_free(layout);
@@ -8310,7 +10256,6 @@ static inline int lfs_mirror_resync(int argc, char **argv)
                        argv[0]);
                rc = CMD_HELP;
                goto error;
-
        }
 
        if (ids_nr > 0) {
@@ -8321,7 +10266,7 @@ static inline int lfs_mirror_resync(int argc, char **argv)
 
        /* set the lease on the file */
        ioc = calloc(sizeof(*ioc) + sizeof(__u32) * 4096, 1);
-       if (ioc == NULL) {
+       if (!ioc) {
                fprintf(stderr, "%s: cannot alloc id array for ioc: %s.\n",
                        argv[0], strerror(errno));
                rc = -errno;
@@ -8348,7 +10293,7 @@ static inline int verify_mirror_id_by_fd(int fd, __u16 mirror_id)
        int rc;
 
        layout = llapi_layout_get_by_fd(fd, 0);
-       if (layout == NULL) {
+       if (!layout) {
                fprintf(stderr, "could not get layout.\n");
                return  -EINVAL;
        }
@@ -8376,22 +10321,16 @@ static inline int verify_mirror_id_by_fd(int fd, __u16 mirror_id)
  * \retval     1  not the same file
  * \retval     <0 error code
  */
-static inline int check_same_file(const char *f1, const char *f2)
+static inline int check_same_file(int fd, 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));
+       if (fstat(fd, &stbuf1) < 0)
                return -errno;
-       }
 
-       if (stat(f2, &stbuf2) < 0) {
-               fprintf(stderr, "%s: cannot stat file '%s': %s\n",
-                       progname, f2, strerror(errno));
-               return -errno;
-       }
+       if (stat(f2, &stbuf2) < 0)
+               return 1;
 
        if (stbuf1.st_rdev == stbuf2.st_rdev &&
            stbuf1.st_ino == stbuf2.st_ino)
@@ -8421,15 +10360,22 @@ static inline int lfs_mirror_read(int argc, char **argv)
                char *end;
 
                switch (c) {
-               case 'N':
-                       mirror_id = strtoul(optarg, &end, 0);
-                       if (*end != '\0' || mirror_id == 0) {
+               case 'N': {
+                       unsigned long int id;
+
+                       errno = 0;
+                       id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' || id == 0 ||
+                           id > UINT16_MAX) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return rc;
                        }
+
+                       mirror_id = (__u16)id;
                        break;
+               }
                case 'o':
                        outfile = optarg;
                        break;
@@ -8457,19 +10403,6 @@ static inline int lfs_mirror_read(int argc, char **argv)
 
        /* 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",
@@ -8486,7 +10419,7 @@ static inline int lfs_mirror_read(int argc, char **argv)
                goto close_fd;
        }
 
-       /* open output file */
+       /* open output file - O_EXCL ensures output is not the same as input */
        if (outfile) {
                outfd = open(outfile, O_EXCL | O_WRONLY | O_CREAT, 0644);
                if (outfd < 0) {
@@ -8590,15 +10523,22 @@ static inline int lfs_mirror_write(int argc, char **argv)
                char *end;
 
                switch (c) {
-               case 'N':
-                       mirror_id = strtoul(optarg, &end, 0);
-                       if (*end != '\0' || mirror_id == 0) {
+               case 'N': {
+                       unsigned long int id;
+
+                       errno = 0;
+                       id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' || id == 0 ||
+                           id > UINT16_MAX) {
                                fprintf(stderr,
                                        "%s %s: invalid mirror ID '%s'\n",
                                        progname, argv[0], optarg);
                                return rc;
                        }
+
+                       mirror_id = (__u16)id;
                        break;
+               }
                case 'i':
                        inputfile = optarg;
                        break;
@@ -8626,19 +10566,6 @@ static inline int lfs_mirror_write(int argc, char **argv)
 
        /* 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",
@@ -8657,6 +10584,16 @@ static inline int lfs_mirror_write(int argc, char **argv)
 
        /* open input file */
        if (inputfile) {
+               rc = check_same_file(fd, inputfile);
+               if (rc == 0) {
+                       fprintf(stderr,
+                       "%s %s: input file cannot be the mirrored file\n",
+                               progname, argv[0]);
+                       goto close_fd;
+               }
+               if (rc < 0)
+                       goto close_fd;
+
                inputfd = open(inputfile, O_RDONLY, 0644);
                if (inputfd < 0) {
                        fprintf(stderr, "%s %s: cannot open file '%s': %s\n",
@@ -8765,6 +10702,256 @@ close_fd:
        return rc;
 }
 
+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) {
+               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': {
+                       unsigned long int id;
+
+                       errno = 0;
+                       id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' || id == 0 ||
+                           id > UINT16_MAX) {
+                               fprintf(stderr,
+                                       "%s %s: invalid read mirror ID '%s'\n",
+                                       progname, argv[0], optarg);
+                               return rc;
+                       }
+
+                       read_mirror_id = (__u16)id;
+                       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) {
+               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) {
+               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.
@@ -8991,7 +11178,7 @@ int lfs_mirror_prepare_chunk(struct llapi_layout *layout,
                                goto error;
                        }
 
-               next:
+next:
                        rc = llapi_layout_comp_use(layout,
                                                   LLAPI_LAYOUT_COMP_USE_NEXT);
                        if (rc < 0) {
@@ -9101,8 +11288,6 @@ int lfs_mirror_verify_chunk(int fd, size_t file_size,
                for (i = 1; i < chunk->mirror_count; i++) {
                        if (crc_array[i] != crc_array[0]) {
                                rc = -EINVAL;
-                               if (!verbose)
-                                       goto error;
 
                                fprintf(stderr,
                                        "%s: chunk "DEXT" has different checksum value on mirror %u and mirror %u.\n",
@@ -9201,7 +11386,7 @@ int lfs_mirror_verify_file(const char *fname, __u16 *mirror_ids, int ids_nr,
        }
 
        layout = llapi_layout_get_by_fd(fd, 0);
-       if (layout == NULL) {
+       if (!layout) {
                fprintf(stderr, "%s: '%s' llapi_layout_get_by_fd failed: %s.\n",
                        progname, fname, strerror(errno));
                rc = -errno;
@@ -9380,7 +11565,6 @@ static inline int lfs_mirror_verify(int argc, char **argv)
                        progname);
                rc = CMD_HELP;
                goto error;
-
        }
 
        if (ids_nr > 0) {
@@ -9498,14 +11682,15 @@ static int lfs_getsom(int argc, char **argv)
        switch (type) {
        case LFS_SOM_ATTR_ALL:
                printf("file: %s size: %llu blocks: %llu flags: %x\n",
-                      path, attrs->lsa_size, attrs->lsa_blocks,
+                      path, (unsigned long long)attrs->lsa_size,
+                      (unsigned long long)attrs->lsa_blocks,
                       attrs->lsa_valid);
                break;
        case LFS_SOM_SIZE:
-               printf("%llu\n", attrs->lsa_size);
+               printf("%llu\n", (unsigned long long)attrs->lsa_size);
                break;
        case LFS_SOM_BLOCKS:
-               printf("%llu\n", attrs->lsa_blocks);
+               printf("%llu\n", (unsigned long long)attrs->lsa_blocks);
                break;
        case LFS_SOM_FLAGS:
                printf("%x\n", attrs->lsa_valid);
@@ -9537,6 +11722,357 @@ static int lfs_mirror_list_commands(int argc, char **argv)
        return 0;
 }
 
+static int lfs_pcc_attach(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'i',   .name = "id",   .has_arg = required_argument },
+       { .name = NULL } };
+       int c;
+       int rc = 0;
+       __u32 archive_id = 0;
+       const char *path;
+       char *end;
+       char fullpath[PATH_MAX];
+       enum lu_pcc_type type = LU_PCC_READWRITE;
+
+       optind = 0;
+       while ((c = getopt_long(argc, argv, "i:",
+                               long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'i':
+                       errno = 0;
+                       archive_id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' ||
+                           archive_id == 0 || archive_id > UINT32_MAX) {
+                               fprintf(stderr,
+                                       "error: %s: bad archive ID '%s'\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 (archive_id == 0) {
+               fprintf(stderr, "%s: must specify attach ID\n", argv[0]);
+               return CMD_HELP;
+       }
+
+       if (argc <= optind) {
+               fprintf(stderr, "%s: must specify one or more file names\n",
+                       argv[0]);
+               return CMD_HELP;
+       }
+
+       while (optind < argc) {
+               int rc2;
+
+               path = argv[optind++];
+               if (!realpath(path, fullpath)) {
+                       fprintf(stderr, "%s: could not find path '%s': %s\n",
+                               argv[0], path, strerror(errno));
+                       if (rc == 0)
+                               rc = -EINVAL;
+                       continue;
+               }
+
+               rc2 = llapi_pcc_attach(fullpath, archive_id, type);
+               if (rc2 < 0) {
+                       fprintf(stderr,
+                               "%s: cannot attach '%s' to PCC with archive ID '%u': %s\n",
+                               argv[0], path, archive_id, strerror(-rc2));
+                       if (rc == 0)
+                               rc = rc2;
+               }
+       }
+       return rc;
+}
+
+static int lfs_pcc_attach_fid(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'i',   .name = "id",   .has_arg = required_argument },
+       { .val = 'm',   .name = "mnt",  .has_arg = required_argument },
+       { .name = NULL } };
+       char                     short_opts[] = "i:m:";
+       int                      c;
+       int                      rc = 0;
+       __u32                    archive_id = 0;
+       char                    *end;
+       const char              *mntpath = NULL;
+       const char              *fidstr;
+       enum lu_pcc_type         type = LU_PCC_READWRITE;
+
+       optind = 0;
+       while ((c = getopt_long(argc, argv, short_opts,
+                               long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'i':
+                       errno = 0;
+                       archive_id = strtoul(optarg, &end, 0);
+                       if (errno != 0 || *end != '\0' ||
+                           archive_id > UINT32_MAX) {
+                               fprintf(stderr,
+                                       "error: %s: bad archive ID '%s'\n",
+                                       argv[0], optarg);
+                               return CMD_HELP;
+                       }
+                       break;
+               case 'm':
+                       mntpath = optarg;
+                       break;
+               case '?':
+                       return CMD_HELP;
+               default:
+                       fprintf(stderr, "%s: option '%s' unrecognized\n",
+                               argv[0], argv[optind - 1]);
+                       return CMD_HELP;
+               }
+       }
+
+       if (archive_id == 0) {
+               fprintf(stderr, "%s: must specify an archive ID\n", argv[0]);
+               return CMD_HELP;
+       }
+
+       if (!mntpath) {
+               fprintf(stderr, "%s: must specify Lustre mount point\n",
+                       argv[0]);
+               return CMD_HELP;
+       }
+
+       if (argc <= optind) {
+               fprintf(stderr, "%s: must specify one or more fids\n", argv[0]);
+               return CMD_HELP;
+       }
+
+       while (optind < argc) {
+               int rc2;
+
+               fidstr = argv[optind++];
+
+               rc2 = llapi_pcc_attach_fid_str(mntpath, fidstr,
+                                              archive_id, type);
+               if (rc2 < 0) {
+                       fprintf(stderr,
+                               "%s: cannot attach '%s' on '%s' to PCC with archive ID '%u': %s\n",
+                               argv[0], fidstr, mntpath, archive_id,
+                               strerror(rc2));
+               }
+               if (rc == 0 && rc2 < 0)
+                       rc = rc2;
+       }
+       return rc;
+}
+
+static int lfs_pcc_detach(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'k',   .name = "keep", .has_arg = no_argument },
+       { .name = NULL } };
+       char                     short_opts[] = "k";
+       int                      c;
+       int                      rc = 0;
+       const char              *path;
+       char                     fullpath[PATH_MAX];
+       __u32                    detach_opt = PCC_DETACH_OPT_UNCACHE;
+
+       optind = 0;
+       while ((c = getopt_long(argc, argv, short_opts,
+                               long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'k':
+                       detach_opt = PCC_DETACH_OPT_NONE;
+                       break;
+               case '?':
+                       return CMD_HELP;
+               default:
+                       fprintf(stderr, "%s: option '%s' unrecognized\n",
+                               argv[0], argv[optind - 1]);
+                       return CMD_HELP;
+               }
+       }
+
+       while (optind < argc) {
+               int rc2;
+
+               path = argv[optind++];
+               if (!realpath(path, fullpath)) {
+                       fprintf(stderr, "%s: could not find path '%s': %s\n",
+                               argv[0], path, strerror(errno));
+                       if (rc == 0)
+                               rc = -EINVAL;
+                       continue;
+               }
+
+               rc2 = llapi_pcc_detach_file(fullpath, detach_opt);
+               if (rc2 < 0) {
+                       rc2 = -errno;
+                       fprintf(stderr,
+                               "%s: cannot detach '%s' from PCC: %s\n",
+                               argv[0], path, strerror(errno));
+                       if (rc == 0)
+                               rc = rc2;
+               }
+       }
+       return rc;
+}
+
+static int lfs_pcc_detach_fid(int argc, char **argv)
+{
+       struct option long_opts[] = {
+       { .val = 'k',   .name = "keep", .has_arg = no_argument },
+       { .name = NULL } };
+       char             short_opts[] = "k";
+       int              c;
+       int              rc = 0;
+       const char      *fid;
+       const char      *mntpath;
+       __u32            detach_opt = PCC_DETACH_OPT_UNCACHE;
+
+       optind = 0;
+       while ((c = getopt_long(argc, argv, short_opts,
+                               long_opts, NULL)) != -1) {
+               switch (c) {
+               case 'k':
+                       detach_opt = PCC_DETACH_OPT_NONE;
+                       break;
+               case '?':
+                       return CMD_HELP;
+               default:
+                       fprintf(stderr, "%s: option '%s' unrecognized\n",
+                               argv[0], argv[optind - 1]);
+                       return CMD_HELP;
+               }
+       }
+
+       mntpath = argv[optind++];
+
+       while (optind < argc) {
+               int rc2;
+
+               fid = argv[optind++];
+
+               rc2 = llapi_pcc_detach_fid_str(mntpath, fid, detach_opt);
+               if (rc2 < 0) {
+                       fprintf(stderr,
+                               "%s: cannot detach '%s' on '%s' from PCC: %s\n",
+                               argv[0], fid, mntpath, strerror(-rc2));
+                       if (rc == 0)
+                               rc = rc2;
+               }
+       }
+       return rc;
+}
+
+static int lfs_pcc_state(int argc, char **argv)
+{
+       int                      rc = 0;
+       const char              *path;
+       char                     fullpath[PATH_MAX];
+       struct lu_pcc_state      state;
+
+       optind = 1;
+
+       if (argc <= 1) {
+               fprintf(stderr, "%s: must specify one or more file names\n",
+                       argv[0]);
+               return CMD_HELP;
+       }
+
+       while (optind < argc) {
+               int rc2;
+
+               path = argv[optind++];
+               if (!realpath(path, fullpath)) {
+                       fprintf(stderr, "%s: could not find path '%s': %s\n",
+                               argv[0], path, strerror(errno));
+                       if (rc == 0)
+                               rc = -EINVAL;
+                       continue;
+               }
+
+               rc2 = llapi_pcc_state_get(fullpath, &state);
+               if (rc2 < 0) {
+                       if (rc == 0)
+                               rc = rc2;
+                       fprintf(stderr,
+                               "%s: cannot get PCC state of '%s': %s\n",
+                               argv[0], path, strerror(-rc2));
+                       continue;
+               }
+
+               printf("file: %s", path);
+               printf(", type: %s", pcc_type2string(state.pccs_type));
+               if (state.pccs_type == LU_PCC_NONE &&
+                   state.pccs_open_count == 0) {
+                       printf("\n");
+                       continue;
+               }
+
+               printf(", PCC file: %s", state.pccs_path);
+               printf(", user number: %u", state.pccs_open_count);
+               printf(", flags: %x", state.pccs_flags);
+               printf("\n");
+       }
+       return rc;
+}
+
+/**
+ * lfs_pcc_list_commands() - List lfs pcc commands.
+ * @argc: The count of command line arguments.
+ * @argv: Array of strings for command line arguments.
+ *
+ * This function lists lfs pcc commands defined in pcc_cmdlist[].
+ *
+ * Return: 0 on success.
+ */
+static int lfs_pcc_list_commands(int argc, char **argv)
+{
+       char buffer[81] = "";
+
+       Parser_list_commands(pcc_cmdlist, buffer, sizeof(buffer),
+                            NULL, 0, 4);
+
+       return 0;
+}
+
+/**
+ * lfs_pcc() - Parse and execute lfs pcc commands.
+ * @argc: The count of lfs pcc command line arguments.
+ * @argv: Array of strings for lfs pcc command line arguments.
+ *
+ * This function parses lfs pcc commands and performs the
+ * corresponding functions specified in pcc_cmdlist[].
+ *
+ * Return: 0 on success or an error code on failure.
+ */
+static int lfs_pcc(int argc, char **argv)
+{
+       char cmd[PATH_MAX];
+       int rc = 0;
+
+       setlinebuf(stdout);
+
+       Parser_init("lfs-pcc > ", pcc_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, pcc_cmdlist);
+       else
+               rc = Parser_commands();
+
+       return rc < 0 ? -rc : rc;
+}
+
 static int lfs_list_commands(int argc, char **argv)
 {
        char buffer[81] = ""; /* 80 printable chars + terminating NUL */