/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2017, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/utils/mount_lustre.c * * Author: Robert Read * Author: Nathan Rutman */ #ifndef _GNU_SOURCE #define _GNU_SOURCE #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "obdctl.h" #include "mount_utils.h" #ifdef HAVE_LIBMOUNT # define WITH_LIBMOUNT "(libmount)" #else # define WITH_LIBMOUNT "" #endif #define MAX_RETRIES 99 int verbose; int version; char *progname; void usage(FILE *out) { fprintf(out, "\nThis mount helper should only be invoked via the " "mount (8) command,\ne.g. mount -t lustre dev dir\n\n"); fprintf(out, "usage: %s [-fhnvV] [-o ] \n", progname); fprintf(out, "usage: %s [-fhnvV] [-o ] \n", progname); fprintf(out, "\t: the local disk device when mounting a server\n" "\t: the server MGS and filesystem for a client:\n" "\t\t[:...]:/[/]\n" "\t\t\t: MGS LNet Node Identifier (e.g. mgs01@o2ib)\n" "\t\t\t: Lustre filesystem name (e.g. lustre1)\n" "\t\t\t: subdirectory of the filesystem to mount\n" "\t: filesystem mountpoint (e.g. /mnt/lustre)\n" "\t-f|--fake: fake mount (only update /etc/mtab)\n" "\t-o force|--force: force mount even if already in /etc/mtab\n" "\t-h|--help: print this usage message\n" "\t-n|--nomtab: do not update /etc/mtab after mount\n" "\t-v|--verbose: print verbose config settings\n" "\t-V|--version: output build version of the utility and exit\n" "\tdefault options are marked below with '*'\n" "\t\t(no)flock: disable* or enable POSIX flock support\n" "\t\t(no)user_xattr: disable or enable* user xattr namespace\n" "\t: one or more comma separated server options:\n" "\t\t(no)acl: disable or enable* POSIX ACL support completely\n" "\t\tabort_recov: abort server recovery handling\n" "\t\tnosvc: only start MGC/MGS without starting MDS/OSS\n" "\t\tnomgs: only start target MDS/OSS, using existing MGS\n" "\t\tnoscrub: do NOT auto start OI scrub unless requested\n" "\t\tskip_lfsck: do NOT auto resume paused/crashed LFSCK\n" "\t\tmd_stripe_cache_size=: set MD RAID device stripe cache size\n" "\t: one or more comma separated client options:\n" "\t\texclude=[:]: list of inactive OSTs (e.g. lustre-OST0001)\n" "\t\tlocalflock: enable POSIX flock only on local client\n" "\t\tretry=: number of times mount is retried by client\n" #ifdef HAVE_GSS "\t\tskpath=: path of keys to load into kernel keyring\n" #endif "\t\t(no)user_fid2path: disable* or enable user $MOUNT/.lustre/fid access\n" "\t\t(no)checksum: disable or enable* data checksums\n" "\t\t(no)lruresize: disable or enable* LDLM dynamic LRU size\n" "\t\t(no)lazystatfs: disable or enable* statfs to work if OST is unavailable\n" "\t\t32bitapi: return only 32-bit inode numbers to userspace\n" "\t\t(no)verbose: disable or enable* messages at filesystem (un,re)mount\n" ); exit((out != stdout) ? EINVAL : 0); } /* Get rid of symbolic hostnames for tcp, since kernel can't do lookups */ #define MAXNIDSTR 1024 static char *convert_hostnames(char *s1) { char *converted, *s2 = 0, *c; char sep; int left = MAXNIDSTR; lnet_nid_t nid; converted = malloc(left); if (converted == NULL) { fprintf(stderr, "out of memory: needed %d bytes\n", MAXNIDSTR); return NULL; } c = converted; while ((left > 0) && (*s1 != '/')) { s2 = strpbrk(s1, ",:"); if (!s2) goto out_free; sep = *s2; *s2 = '\0'; nid = libcfs_str2nid(s1); *s2 = sep; /* back to original string */ if (nid == LNET_NID_ANY) goto out_free; c += scnprintf(c, left, "%s%c", libcfs_nid2str(nid), sep); left = converted + MAXNIDSTR - c; s1 = s2 + 1; } snprintf(c, left, "%s", s1); return converted; out_free: fprintf(stderr, "%s: Can't parse NID '%s'\n", progname, s1); free(converted); return NULL; } /***************************************************************************** * * This part was cribbed from util-linux/mount/mount.c. There was no clear * license information, but many other files in the package are identified as * GNU GPL, so it's a pretty safe bet that was their intent. * ****************************************************************************/ struct opt_map { const char *opt; /* option name */ int inv; /* true if flag value should be inverted */ int mask; /* flag mask value */ }; static const struct opt_map opt_map[] = { /* these flags are parsed by mount, not Lustre */ { .opt = "async", .mask = MS_SYNCHRONOUS, .inv = 1 }, /* asynchronous I/O */ { .opt = "atime", .mask = MS_NOATIME, .inv = 1 }, /* set access time */ { .opt = "auto" }, /* allow auto mount */ { .opt = "defaults" }, /* default options */ { .opt = "dev", .mask = MS_NODEV, .inv = 1 }, /* interpret devs */ { .opt = "exec", .mask = MS_NOEXEC, .inv = 1 }, /* allow execution */ { .opt = "loop" }, { .opt = "noatime", .mask = MS_NOATIME }, /* do not set atime */ { .opt = "noauto" }, /* mount explicitly */ { .opt = "nodev", .mask = MS_NODEV }, /* no interpret devs */ { .opt = "noowner", .inv = 1 }, /* no special privs */ { .opt = "nosuid", .mask = MS_NOSUID }, /* do not honor suid */ { .opt = "nouser", .inv = 1 }, /* users cannot mount */ { .opt = "nousers", .inv = 1 }, /* users cannot mount */ { .opt = "_netdev" }, /* network only */ { .opt = "noexec", .mask = MS_NOEXEC }, /* no execute */ { .opt = "remount", .mask = MS_REMOUNT }, /* remount */ { .opt = "ro", .mask = MS_RDONLY }, /* read-only */ { .opt = "rw", .mask = MS_RDONLY, .inv = 1 }, /* read-write */ { .opt = "suid", .mask = MS_NOSUID, .inv = 1 }, /* honor suid */ { .opt = "sync", .mask = MS_SYNCHRONOUS }, /* synchronous I/O */ #ifdef MS_NODIRATIME { .opt = "diratime", /* set access time */ .mask = MS_NODIRATIME, .inv = 1 }, /* on read */ { .opt = "nodiratime", /* do not set access */ .mask = MS_NODIRATIME }, /* time on read */ #endif #ifdef MS_RELATIME { .opt = "norelatime", /* do not set rel */ .mask = MS_RELATIME, .inv = 1 }, /* access time */ { .opt = "relatime", /* set relative */ .mask = MS_RELATIME }, /* access time */ #endif #ifdef MS_STRICTATIME { .opt = "strictatime", .mask = MS_STRICTATIME }, /* strict access time */ #endif { .opt = NULL } }; /****************************************************************************/ /* 1 = don't pass on to lustre 0 = pass on to lustre */ static int parse_one_option(const char *check, int *flagp) { const struct opt_map *opt; for (opt = &opt_map[0]; opt->opt != NULL; opt++) { if (strncmp(check, opt->opt, strlen(opt->opt)) == 0) { if (opt->mask) { if (opt->inv) *flagp &= ~(opt->mask); else *flagp |= opt->mask; } return 1; } } /* Assume any unknown options are valid and pass them on. The mount will fail if lmd_parse, ll_options or ldiskfs doesn't recognize it.*/ return 0; } static size_t merge_strings(char *dst, const char *src, size_t size) { size_t dsize = strlen(dst); size_t len = strlen(src); size_t ret = dsize + len; dst += dsize; size -= dsize; if (len >= size) len = size - 1; memcpy(dst, src, len); dst[len] = '\0'; return ret; } static int append_option(char *options, size_t options_len, const char *param, const char *value) { int rc; if (options[0] != '\0') { rc = merge_strings(options, ",", options_len); if (rc >= options_len) goto out_err; } rc = merge_strings(options, param, options_len); if (rc >= options_len) goto out_err; if (value != NULL) { rc = merge_strings(options, value, options_len); if (rc >= options_len) goto out_err; } return 0; out_err: fprintf(stderr, "error: mount options %s%s too long\n", param, value); return E2BIG; } /* Replace options with subset of Lustre-specific options, and fill in mount flags */ int parse_options(struct mount_opts *mop, char *orig_options, int *flagp, size_t options_len) { char *options, *opt, *nextopt, *arg, *val; int rc = 0; options = calloc(strlen(orig_options) + 1, 1); if (options == NULL) return ENOMEM; *flagp = 0; nextopt = orig_options; while ((opt = strsep(&nextopt, ","))) { if (!*opt) /* empty option */ continue; /* Handle retries in a slightly different manner */ arg = opt; val = strchr(opt, '='); /* please note that some ldiskfs mount options are also in * the form of param=value. We should pay attention not to * remove those mount options, see bug 22097. */ if (val && strncmp(arg, "max_sectors_kb", 14) == 0) { mop->mo_max_sectors_kb = atoi(val + 1); } else if (val && strncmp(arg, "md_stripe_cache_size", 20) == 0) { mop->mo_md_stripe_cache_size = atoi(val + 1); } else if (val && strncmp(arg, "retry", 5) == 0) { mop->mo_retry = atoi(val + 1); if (mop->mo_retry > MAX_RETRIES) mop->mo_retry = MAX_RETRIES; else if (mop->mo_retry < 0) mop->mo_retry = 0; } else if (val && strncmp(arg, "mgssec", 6) == 0) { rc = append_option(options, options_len, opt, NULL); if (rc != 0) goto out_options; } else if (strncmp(arg, "nosvc", 5) == 0) { mop->mo_nosvc = 1; rc = append_option(options, options_len, opt, NULL); if (rc != 0) goto out_options; } else if (strcmp(opt, "force") == 0) { /* XXX special check for 'force' option */ ++mop->mo_force; printf("force: %d\n", mop->mo_force); #ifdef HAVE_GSS } else if (val && strncmp(opt, "skpath=", 7) == 0) { if (strlen(val) + 1 >= sizeof(mop->mo_skpath)) { fprintf(stderr, "%s: shared key path too long\n", progname); free(options); return EINVAL; } strncpy(mop->mo_skpath, val + 1, sizeof(mop->mo_skpath) - 1); #endif } else if (parse_one_option(opt, flagp) == 0) { /* pass this on as an option */ rc = append_option(options, options_len, opt, NULL); if (rc != 0) goto out_options; } } #ifdef MS_STRICTATIME #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(3, 2, 53, 0) /* * LU-1783 * In the future when upstream fixes land in all supported kernels * we should stop forcing MS_STRICTATIME in lustre mounts. * We override the kernel level default of MS_RELATIME for now * due to a kernel vfs level bug in atime updates that fails * to reset timestamps from the future. */ #warn "remove MS_STRICTATIME override if kernel updates atime from the future" #endif /* set strictatime to default if NOATIME or RELATIME not given explicit */ if (!(*flagp & (MS_NOATIME | MS_RELATIME))) *flagp |= MS_STRICTATIME; #endif strcpy(orig_options, options); out_options: free(options); return rc; } #ifdef HAVE_SERVER_SUPPORT /* Add mgsnids from ldd params */ static int add_mgsnids(struct mount_opts *mop, char *options, const char *params, size_t options_len) { char *ptr = (char *)params; char tmp, *sep; int rc = 0; while ((ptr = strstr(ptr, PARAM_MGSNODE)) != NULL) { sep = strchr(ptr, ' '); if (sep != NULL) { tmp = *sep; *sep = '\0'; } rc = append_option(options, options_len, ptr, NULL); if (rc != 0) goto out; mop->mo_have_mgsnid++; if (sep) { *sep = tmp; ptr = sep; } else { break; } } out: return rc; } static int clear_update_ondisk(char *source, struct lustre_disk_data *ldd) { char wanted_mountopts[512] = ""; struct mkfs_opts mkop; int ret; int ret2; memset(&mkop, 0, sizeof(mkop)); mkop.mo_ldd = *ldd; mkop.mo_ldd.ldd_flags &= ~LDD_F_UPDATE; mkop.mo_flags = MO_NOHOSTID_CHECK; /* Ignore missing hostid */ if (strlen(source) > sizeof(mkop.mo_device)-1) { fatal(); fprintf(stderr, "Device name too long: %s\n", source); return -E2BIG; } strncpy(mkop.mo_device, source, sizeof(mkop.mo_device)); ret = osd_prepare_lustre(&mkop, wanted_mountopts, sizeof(wanted_mountopts)); if (ret) { fatal(); fprintf(stderr, "Can't prepare device %s: %s\n", source, strerror(ret)); return ret; } /* Create the loopback file */ if (mkop.mo_flags & MO_IS_LOOP) { ret = access(mkop.mo_device, F_OK); if (ret) { ret = errno; fatal(); fprintf(stderr, "Can't access device %s: %s\n", source, strerror(ret)); return ret; } ret = loop_setup(&mkop); if (ret) { fatal(); fprintf(stderr, "Loop device setup for %s failed: %s\n", mkop.mo_device, strerror(ret)); return ret; } } ret = osd_write_ldd(&mkop); if (ret != 0) { fatal(); fprintf(stderr, "failed to write local files: %s\n", strerror(ret)); } ret2 = loop_cleanup(&mkop); if (ret == 0) ret = ret2; return ret; } static int parse_ldd(char *source, struct mount_opts *mop, char *options, size_t options_len) { struct lustre_disk_data *ldd = &mop->mo_ldd; char *cur, *start; char *temp_options; int rc = 0; rc = osd_is_lustre(source, &ldd->ldd_mount_type); if (rc == 0) { fprintf(stderr, "%s: %s has not been formatted with mkfs.lustre" " or the backend filesystem type is not supported by " "this tool\n", progname, source); return ENODEV; } rc = osd_read_ldd(source, ldd); if (rc) { fprintf(stderr, "%s: %s failed to read permanent mount" " data: %s\n", progname, source, rc >= 0 ? strerror(rc) : ""); return rc; } if ((IS_MDT(ldd) || IS_OST(ldd)) && (ldd->ldd_flags & LDD_F_NEED_INDEX)) { fprintf(stderr, "%s: %s has no index assigned " "(probably formatted with old mkfs)\n", progname, source); return EINVAL; } if (ldd->ldd_flags & LDD_F_UPDATE) clear_update_ondisk(source, ldd); /* Since we never rewrite ldd, ignore temp flags */ ldd->ldd_flags &= ~(LDD_F_VIRGIN | LDD_F_WRITECONF); /* This is to make sure default options go first */ temp_options = strdup(options); if (temp_options == NULL) { fprintf(stderr, "%s: can't allocate memory for temp_options\n", progname); return ENOMEM; } strncpy(options, ldd->ldd_mount_opts, options_len); rc = append_option(options, options_len, temp_options, NULL); free(temp_options); if (rc != 0) return rc; /* svname of the form lustre:OST1234 means never registered */ rc = strlen(ldd->ldd_svname); if (strcmp(ldd->ldd_svname, "MGS") != 0) { if (rc < 8) { fprintf(stderr, "%s: invalid name '%s'\n", progname, ldd->ldd_svname); return EINVAL; } else if (ldd->ldd_svname[rc - 8] == ':') { ldd->ldd_svname[rc - 8] = '-'; ldd->ldd_flags |= LDD_F_VIRGIN; } else if (ldd->ldd_svname[rc - 8] == '=') { ldd->ldd_svname[rc - 8] = '-'; ldd->ldd_flags |= LDD_F_WRITECONF; } } /* backend osd type */ rc = append_option(options, options_len, "osd=", mt_type(ldd->ldd_mount_type)); if (rc != 0) return rc; if (!mop->mo_have_mgsnid) { /* Only use disk data if mount -o mgsnode=nid wasn't * specified */ if (ldd->ldd_flags & LDD_F_SV_TYPE_MGS) { rc = append_option(options, options_len, "mgs", NULL); if (rc != 0) return rc; mop->mo_have_mgsnid++; } else { if (add_mgsnids(mop, options, ldd->ldd_params, options_len)) return E2BIG; } } /* Better have an mgsnid by now */ if (!mop->mo_have_mgsnid) { fprintf(stderr, "%s: missing option mgsnode=\n", progname); return EINVAL; } if (ldd->ldd_flags & LDD_F_VIRGIN) { rc = append_option(options, options_len, "virgin", NULL); if (rc != 0) return rc; } if (ldd->ldd_flags & LDD_F_UPDATE) { rc = append_option(options, options_len, "update", NULL); if (rc != 0) return rc; } if (ldd->ldd_flags & LDD_F_WRITECONF) { rc = append_option(options, options_len, "writeconf", NULL); if (rc != 0) return rc; } if (ldd->ldd_flags & LDD_F_NO_PRIMNODE) { rc = append_option(options, options_len, "noprimnode", NULL); if (rc != 0) return rc; } /* prefix every lustre parameter with param= so that in-kernel * mount can recognize them properly and send to MGS at registration */ start = ldd->ldd_params; while (start && *start != '\0') { while (*start == ' ') start++; if (*start == '\0') break; cur = start; start = strchr(cur, ' '); if (start) { *start = '\0'; start++; } rc = append_option(options, options_len, "param=", cur); if (rc != 0) return rc; } /* svname must be last option */ rc = append_option(options, options_len, "svname=", ldd->ldd_svname); return rc; } #endif /* HAVE_SERVER_SUPPORT */ static void set_defaults(struct mount_opts *mop) { memset(mop, 0, sizeof(*mop)); mop->mo_usource = NULL; mop->mo_source = NULL; mop->mo_nomtab = 0; mop->mo_fake = 0; mop->mo_force = 0; mop->mo_retry = 0; mop->mo_have_mgsnid = 0; mop->mo_md_stripe_cache_size = 16384; mop->mo_orig_options = ""; mop->mo_nosvc = 0; mop->mo_max_sectors_kb = -1; } static int parse_opts(int argc, char *const argv[], struct mount_opts *mop) { static struct option long_opts[] = { { .val = 1, .name = "force", .has_arg = no_argument }, { .val = 'f', .name = "fake", .has_arg = no_argument }, { .val = 'h', .name = "help", .has_arg = no_argument }, { .val = 'n', .name = "nomtab", .has_arg = no_argument }, { .val = 'o', .name = "options", .has_arg = required_argument }, { .val = 'v', .name = "verbose", .has_arg = no_argument }, { .val = 'V', .name = "version", .has_arg = no_argument }, { .name = NULL } }; char real_path[PATH_MAX] = {'\0'}; FILE *f; char path[256], name[256]; size_t sz; char *ptr; int opt, rc; while ((opt = getopt_long(argc, argv, "fhno:vV", long_opts, NULL)) != EOF){ switch (opt) { case 1: ++mop->mo_force; printf("force: %d\n", mop->mo_force); break; case 'f': ++mop->mo_fake; printf("fake: %d\n", mop->mo_fake); break; case 'h': usage(stdout); break; case 'n': ++mop->mo_nomtab; printf("nomtab: %d\n", mop->mo_nomtab); break; case 'o': mop->mo_orig_options = optarg; break; case 'v': ++verbose; break; case 'V': ++version; fprintf(stdout, "%s %s %s\n", progname, LUSTRE_VERSION_STRING, WITH_LIBMOUNT); return 0; default: fprintf(stderr, "%s: unknown option '%c'\n", progname, opt); usage(stderr); break; } } if (optind + 2 > argc) { fprintf(stderr, "%s: too few arguments\n", progname); usage(stderr); } mop->mo_usource = argv[optind]; if (!mop->mo_usource) { usage(stderr); } /** * Try to get the real path to the device, in case it is a * symbolic link for instance */ if (realpath(mop->mo_usource, real_path) != NULL) { ptr = strrchr(real_path, '/'); if (ptr && strncmp(ptr, "/dm-", 4) == 0 && isdigit(*(ptr + 4))) { snprintf(path, sizeof(path), "/sys/block/%s/dm/name", ptr+1); if ((f = fopen(path, "r"))) { /* read "\n" from sysfs */ if (fgets(name, sizeof(name), f) && (sz = strlen(name)) > 1) { name[sz - 1] = '\0'; snprintf(real_path, sizeof(real_path), "/dev/mapper/%s", name); } fclose(f); } } mop->mo_usource = strdup(real_path); } ptr = strstr(mop->mo_usource, ":/"); if (ptr != NULL) { mop->mo_source = convert_hostnames(mop->mo_usource); if (!mop->mo_source) usage(stderr); } else { mop->mo_source = strdup(mop->mo_usource); } if (realpath(argv[optind + 1], mop->mo_target) == NULL) { rc = errno; fprintf(stderr, "warning: %s: cannot resolve: %s\n", argv[optind + 1], strerror(errno)); return rc; } return 0; } #ifdef HAVE_SERVER_SUPPORT /* change label from : to * - to indicate the device has * been registered. only if the label is * supposed to be changed and target service * is supposed to start */ static void label_lustre(struct mount_opts *mop) { if (mop->mo_nosvc) return; if (mop->mo_ldd.ldd_flags & (LDD_F_VIRGIN | LDD_F_WRITECONF)) { (void)osd_label_lustre(mop); } else { struct lustre_disk_data ldd; int rc; /* device label could be changed after journal recovery, * it should also be relabeled for mount has succeeded. */ memset(&ldd, 0, sizeof(ldd)); ldd.ldd_mount_type = mop->mo_ldd.ldd_mount_type; rc = osd_read_ldd(mop->mo_source, &ldd); if (rc == 0) { rc = strlen(ldd.ldd_svname); if (rc >= 8 && ldd.ldd_svname[rc - 8] != '-') (void)osd_label_lustre(mop); } } } #endif /* HAVE_SERVER_SUPPORT */ int main(int argc, char *const argv[]) { struct mount_opts mop; char *options; int i, flags; int rc; bool client; size_t maxopt_len; size_t g_pagesize; progname = strrchr(argv[0], '/'); progname = progname ? progname + 1 : argv[0]; set_defaults(&mop); g_pagesize = sysconf(_SC_PAGESIZE); if (g_pagesize == -1) { rc = errno; printf("error: %d failed to get page size.\n", rc); return rc; } maxopt_len = MIN(g_pagesize, 64 * 1024); rc = parse_opts(argc, argv, &mop); if (rc || version) return rc; if (verbose) { for (i = 0; i < argc; i++) printf("arg[%d] = %s\n", i, argv[i]); printf("source = %s (%s), target = %s\n", mop.mo_usource, mop.mo_source, mop.mo_target); printf("options = %s\n", mop.mo_orig_options); } options = malloc(maxopt_len); if (options == NULL) { fprintf(stderr, "can't allocate memory for options\n"); rc = ENOMEM; goto out_mo_source; } if (strlen(mop.mo_orig_options) >= maxopt_len) { fprintf(stderr, "error: mount options too long\n"); rc = E2BIG; goto out_options; } strcpy(options, mop.mo_orig_options); rc = parse_options(&mop, options, &flags, maxopt_len); if (rc) { fprintf(stderr, "%s: can't parse options: %s\n", progname, options); goto out_options; } if (!mop.mo_force) { rc = check_mtab_entry(mop.mo_usource, mop.mo_source, mop.mo_target, "lustre"); if (rc && !(flags & MS_REMOUNT)) { fprintf(stderr, "%s: according to %s %s is " "already mounted on %s\n", progname, MOUNTED, mop.mo_usource, mop.mo_target); rc = EEXIST; goto out_options; } if (!rc && (flags & MS_REMOUNT)) { fprintf(stderr, "%s: according to %s %s is " "not already mounted on %s\n", progname, MOUNTED, mop.mo_usource, mop.mo_target); rc = ENOENT; goto out_options; } } if (flags & MS_REMOUNT) mop.mo_nomtab++; rc = access(mop.mo_target, F_OK); if (rc) { rc = errno; fprintf(stderr, "%s: %s inaccessible: %s\n", progname, mop.mo_target, strerror(errno)); goto out_options; } client = (strstr(mop.mo_usource, ":/") != NULL); if (!client) { #ifdef HAVE_SERVER_SUPPORT rc = osd_init(); if (rc) goto out_options; rc = parse_ldd(mop.mo_source, &mop, options, maxopt_len); if (rc) goto out_osd; #else rc = -EINVAL; goto out_options; #endif } /* In Linux 2.4, the target device doesn't get passed to any of our functions. So we'll stick it on the end of the options. */ rc = append_option(options, maxopt_len, "device=", mop.mo_source); if (rc != 0) goto out_osd; if (verbose) printf("mounting device %s at %s, flags=%#x options=%s\n", mop.mo_source, mop.mo_target, flags, options); #ifdef HAVE_SERVER_SUPPORT if (!client && osd_tune_lustre(mop.mo_source, &mop)) { if (verbose) fprintf(stderr, "%s: unable to set tunables for %s" " (may cause reduced IO performance)\n", argv[0], mop.mo_source); } #endif #ifdef HAVE_GSS if (mop.mo_skpath[0] != '\0') { /* Treat shared key failures as fatal */ rc = load_shared_keys(&mop); if (rc) { fprintf(stderr, "%s: Error loading shared keys: %s\n", progname, strerror(rc)); goto out_osd; } } #endif /* HAVE_GSS */ if (!mop.mo_fake) { /* flags and target get to lustre_get_sb(), but not * lustre_fill_super(). Lustre ignores the flags, but mount * does not. */ for (i = 0, rc = -EAGAIN; i <= mop.mo_retry && rc != 0; i++) { rc = mount(mop.mo_source, mop.mo_target, "lustre", flags, (void *)options); if (rc != 0) { if (verbose) { fprintf(stderr, "%s: mount %s at %s " "failed: %s retries left: " "%d\n", basename(progname), mop.mo_usource, mop.mo_target, strerror(errno), mop.mo_retry - i); } if (mop.mo_retry) { int limit = i/2 > 5 ? i/2 : 5; sleep(1 << limit); } else { rc = errno; } #ifdef HAVE_SERVER_SUPPORT } else { if (!client) label_lustre(&mop); #endif } } } if (rc) { char *cli; rc = errno; cli = strrchr(mop.mo_usource, ':'); if (cli && (strlen(cli) > 2)) cli += 2; else cli = NULL; fprintf(stderr, "%s: mount %s at %s failed: %s\n", progname, mop.mo_usource, mop.mo_target, strerror(errno)); if (errno == EBUSY) fprintf(stderr, "Is the backend filesystem mounted?\n" "Check /etc/mtab and /proc/mounts\n"); if (errno == ENODEV) fprintf(stderr, "Are the lustre modules loaded?\n" "Check /etc/modprobe.conf and " "/proc/filesystems\n"); if (errno == ENOTBLK) fprintf(stderr, "Do you need -o loop?\n"); if (errno == ENOMEDIUM) fprintf(stderr, "This filesystem needs at least 1 OST\n"); if (errno == ENOENT) { fprintf(stderr, "Is the MGS specification correct?\n"); fprintf(stderr, "Is the filesystem name correct?\n"); fprintf(stderr, "If upgrading, is the copied client log" " valid? (see upgrade docs)\n"); } if (errno == EALREADY) fprintf(stderr, "The target service is already running." " (%s)\n", mop.mo_usource); if (errno == ENXIO) fprintf(stderr, "The target service failed to start " "(bad config log?) (%s). " "See /var/log/messages.\n", mop.mo_usource); if (errno == EIO) fprintf(stderr, "Is the MGS running?\n"); if (errno == EADDRINUSE) fprintf(stderr, "The target service's index is already " "in use. (%s)\n", mop.mo_usource); if (errno == EINVAL) { fprintf(stderr, "This may have multiple causes.\n"); if (cli) fprintf(stderr, "Is '%s' the correct filesystem" " name?\n", cli); fprintf(stderr, "Are the mount options correct?\n"); fprintf(stderr, "Check the syslog for more info.\n"); } /* May as well try to clean up loop devs */ if (strncmp(mop.mo_usource, "/dev/loop", 9) == 0) { char cmd[256]; int ret; sprintf(cmd, "/sbin/losetup -d %s", mop.mo_usource); if ((ret = system(cmd)) < 0) rc = errno; else if (ret > 0) rc = WEXITSTATUS(ret); } } else { /* Deal with utab just for client. Note that we ignore * the return value here since it is not worth to fail * mount by prevent some rare cases */ if (strstr(mop.mo_usource, ":/") != NULL) update_utab_entry(&mop); if (!mop.mo_nomtab) { rc = update_mtab_entry(mop.mo_usource, mop.mo_target, "lustre", mop.mo_orig_options, 0, 0, 0); } } out_osd: #ifdef HAVE_SERVER_SUPPORT if (!client) osd_fini(); #endif out_options: free(options); out_mo_source: /* mo_usource should be freed, but we can rely on the kernel */ free(mop.mo_source); return rc; }