4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/utils/mount_lustre.c
34 * Author: Robert Read <rread@clusterfs.com>
35 * Author: Nathan Rutman <nathan@clusterfs.com>
50 #include <sys/mount.h>
51 #include <sys/param.h>
52 #include <linux/lustre/lustre_ver.h>
55 #include <linux/lnet/nidstr.h>
56 #include <libcfs/util/string.h>
59 #include "mount_utils.h"
62 # define WITH_LIBMOUNT "(libmount)"
64 # define WITH_LIBMOUNT ""
67 #define MAX_RETRIES 99
76 "\nThis mount helper should only be invoked via the mount (8) command,\ne.g. mount -t lustre dev dir\n\n");
77 fprintf(out, "usage: %s [-fhnvV] [-o <srvopt>] <device> <mountpt>\n",
79 fprintf(out, "usage: %s [-fhnvV] [-o <cliopt>] <mgstarget> <mountpt>\n",
82 "\t<device>: the local disk device when mounting a server\n"
83 "\t<mgstarget>: the server MGS and filesystem for a client:\n"
84 "\t\t<mgsnid>[:<altmgsnid>...]:/<filesystem>[/<subdir>]\n"
85 "\t\t\t<mgsnid>: MGS LNet Node Identifier (e.g. mgs01@o2ib)\n"
86 "\t\t\t<filesystem>: Lustre filesystem name (e.g. lustre1)\n"
87 "\t\t\t<subdir>: subdirectory of the filesystem to mount\n"
88 "\t<mountpt>: filesystem mountpoint (e.g. /mnt/lustre)\n"
89 "\t-f|--fake: fake mount (only update /etc/mtab)\n"
90 "\t-o force|--force: force mount even if already in /etc/mtab\n"
91 "\t-h|--help: print this usage message\n"
92 "\t-n|--nomtab: do not update /etc/mtab after mount\n"
93 "\t-v|--verbose: print verbose config settings\n"
94 "\t-V|--version: output build version of the utility and exit\n"
95 "\tdefault options are marked below with '*'\n"
96 "\t\t(no)flock: disable* or enable POSIX flock support\n"
97 "\t\t(no)user_xattr: disable or enable* user xattr namespace\n"
98 "\t<srvopt>: one or more comma separated server options:\n"
99 "\t\t(no)acl: disable or enable* POSIX ACL support completely\n"
100 "\t\tabort_recov: abort server recovery handling\n"
101 "\t\tnosvc: only start MGC/MGS without starting MDS/OSS\n"
102 "\t\tnomgs: only start target MDS/OSS, using existing MGS\n"
103 "\t\tnoscrub: do NOT auto start OI scrub unless requested\n"
104 "\t\tskip_lfsck: do NOT auto resume paused/crashed LFSCK\n"
105 "\t\tmd_stripe_cache_size=<num>: set MD RAID device stripe cache size\n"
106 "\t<cliopt>: one or more comma separated client options:\n"
107 "\t\texclude=<ostname>[:<ostname>]: list of inactive OSTs (e.g. lustre-OST0001)\n"
108 "\t\tlocalflock: enable POSIX flock only on local client\n"
109 "\t\tretry=<num>: number of times mount is retried by client\n"
111 "\t\tskpath=<file|directory>: path of keys to load into kernel keyring\n"
113 "\t\t(no)user_fid2path: disable* or enable user $MOUNT/.lustre/fid access\n"
114 "\t\t(no)checksum: disable or enable* data checksums\n"
115 "\t\t(no)lruresize: disable or enable* LDLM dynamic LRU size\n"
116 "\t\t(no)lazystatfs: disable or enable* statfs to work if OST is unavailable\n"
117 "\t\t32bitapi: return only 32-bit inode numbers to userspace\n"
118 "\t\t(no)verbose: disable or enable* messages at filesystem (un,re)mount\n"
120 exit((out != stdout) ? EINVAL : 0);
123 /* Get rid of symbolic hostnames for tcp, since kernel can't do lookups */
124 #define MAXNIDSTR 1024
125 static char *convert_hostnames(char *s1)
127 char *converted, *s2 = 0, *c;
129 int left = MAXNIDSTR;
132 converted = malloc(left);
134 fprintf(stderr, "out of memory: needed %d bytes\n",
139 while ((left > 0) && (*s1 != '/')) {
140 s2 = strpbrk(s1, ",:");
145 nid = libcfs_str2nid(s1);
146 *s2 = sep; /* back to original string */
147 if (nid == LNET_NID_ANY)
149 c += scnprintf(c, left, "%s%c", libcfs_nid2str(nid), sep);
150 left = converted + MAXNIDSTR - c;
153 snprintf(c, left, "%s", s1);
156 fprintf(stderr, "%s: Can't parse NID '%s'\n", progname, s1);
161 /*****************************************************************************
163 * This part was cribbed from util-linux/mount/mount.c. There was no clear
164 * license information, but many other files in the package are identified as
165 * GNU GPL, so it's a pretty safe bet that was their intent.
167 ****************************************************************************/
169 const char *opt; /* option name */
170 int inv; /* true if flag value should be inverted */
171 int mask; /* flag mask value */
174 static const struct opt_map opt_map[] = {
175 /* these flags are parsed by mount, not Lustre */
176 { .opt = "async", .mask = MS_SYNCHRONOUS, .inv = 1 }, /* asynchronous I/O */
177 { .opt = "atime", .mask = MS_NOATIME, .inv = 1 }, /* set access time */
178 { .opt = "auto" }, /* allow auto mount */
179 { .opt = "defaults" }, /* default options */
180 { .opt = "dev", .mask = MS_NODEV, .inv = 1 }, /* interpret devs */
181 { .opt = "exec", .mask = MS_NOEXEC, .inv = 1 }, /* allow execution */
183 { .opt = "noatime", .mask = MS_NOATIME }, /* do not set atime */
184 { .opt = "noauto" }, /* mount explicitly */
185 { .opt = "nodev", .mask = MS_NODEV }, /* no interpret devs */
186 { .opt = "noowner", .inv = 1 }, /* no special privs */
187 { .opt = "nosuid", .mask = MS_NOSUID }, /* do not honor suid */
188 { .opt = "nouser", .inv = 1 }, /* users cannot mount */
189 { .opt = "nousers", .inv = 1 }, /* users cannot mount */
190 { .opt = "_netdev" }, /* network only */
191 { .opt = "noexec", .mask = MS_NOEXEC }, /* no execute */
192 { .opt = "remount", .mask = MS_REMOUNT }, /* remount */
193 { .opt = "ro", .mask = MS_RDONLY }, /* read-only */
194 { .opt = "rw", .mask = MS_RDONLY, .inv = 1 }, /* read-write */
195 { .opt = "suid", .mask = MS_NOSUID, .inv = 1 }, /* honor suid */
196 { .opt = "sync", .mask = MS_SYNCHRONOUS }, /* synchronous I/O */
198 { .opt = "diratime", /* set access time */
199 .mask = MS_NODIRATIME, .inv = 1 }, /* on read */
200 { .opt = "nodiratime", /* do not set access */
201 .mask = MS_NODIRATIME }, /* time on read */
204 { .opt = "norelatime", /* do not set rel */
205 .mask = MS_RELATIME, .inv = 1 }, /* access time */
206 { .opt = "relatime", /* set relative */
207 .mask = MS_RELATIME }, /* access time */
209 #ifdef MS_STRICTATIME
210 { .opt = "strictatime",
211 .mask = MS_STRICTATIME }, /* strict access time */
214 /****************************************************************************/
217 * 1 = don't pass on to lustre
218 * 0 = pass on to lustre
220 static int parse_one_option(const char *check, int *flagp)
222 const struct opt_map *opt;
224 for (opt = &opt_map[0]; opt->opt != NULL; opt++) {
225 if (strncmp(check, opt->opt, strlen(opt->opt)) == 0) {
228 *flagp &= ~(opt->mask);
236 * Assume any unknown options are valid and pass them on. The mount
237 * will fail if lmd_parse, ll_options or ldiskfs doesn't recognize it.
242 static size_t merge_strings(char *dst, const char *src, size_t size)
244 size_t dsize = strlen(dst);
245 size_t len = strlen(src);
246 size_t ret = dsize + len;
252 memcpy(dst, src, len);
257 static int append_option(char *options, size_t options_len,
258 const char *param, const char *value)
262 if (options[0] != '\0') {
263 rc = merge_strings(options, ",", options_len);
264 if (rc >= options_len)
268 rc = merge_strings(options, param, options_len);
269 if (rc >= options_len)
273 rc = merge_strings(options, value, options_len);
274 if (rc >= options_len)
279 fprintf(stderr, "error: mount options %s%s too long\n", param, value);
284 * Replace options with subset of Lustre-specific options, and
285 * fill in mount flags
287 int parse_options(struct mount_opts *mop, char *orig_options,
288 int *flagp, size_t options_len)
290 char *options, *opt, *nextopt, *arg, *val;
293 options = calloc(strlen(orig_options) + 1, 1);
298 nextopt = orig_options;
299 while ((opt = strsep(&nextopt, ","))) {
304 /* Handle retries in a slightly different manner */
306 val = strchr(opt, '=');
308 * please note that some ldiskfs mount options are also in
309 * the form of param=value. We should pay attention not to
310 * remove those mount options, see bug 22097.
312 if (val && strncmp(arg, "max_sectors_kb", 14) == 0) {
313 mop->mo_max_sectors_kb = atoi(val + 1);
315 strncmp(arg, "md_stripe_cache_size", 20) == 0) {
316 mop->mo_md_stripe_cache_size = atoi(val + 1);
317 } else if (val && strncmp(arg, "retry", 5) == 0) {
318 mop->mo_retry = atoi(val + 1);
319 if (mop->mo_retry > MAX_RETRIES)
320 mop->mo_retry = MAX_RETRIES;
321 else if (mop->mo_retry < 0)
323 } else if (val && strncmp(arg, "mgssec", 6) == 0) {
324 rc = append_option(options, options_len, opt, NULL);
327 } else if (strncmp(arg, "nosvc", 5) == 0) {
329 rc = append_option(options, options_len, opt, NULL);
332 } else if (strcmp(opt, "force") == 0) {
333 /* XXX special check for 'force' option */
335 printf("force: %d\n", mop->mo_force);
337 } else if (val && strncmp(opt, "skpath=", 7) == 0) {
338 if (strlen(val) + 1 >= sizeof(mop->mo_skpath)) {
340 "%s: shared key path too long\n",
345 strncpy(mop->mo_skpath, val + 1,
346 sizeof(mop->mo_skpath) - 1);
348 } else if (parse_one_option(opt, flagp) == 0) {
349 /* pass this on as an option */
350 rc = append_option(options, options_len, opt, NULL);
355 #ifdef MS_STRICTATIME
356 #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(3, 2, 53, 0)
359 * In the future when upstream fixes land in all supported kernels
360 * we should stop forcing MS_STRICTATIME in lustre mounts.
361 * We override the kernel level default of MS_RELATIME for now
362 * due to a kernel vfs level bug in atime updates that fails
363 * to reset timestamps from the future.
365 #warn "remove MS_STRICTATIME override if kernel updates atime from the future"
368 * set strictatime to default if NOATIME or RELATIME
371 if (!(*flagp & (MS_NOATIME | MS_RELATIME)))
372 *flagp |= MS_STRICTATIME;
374 strcpy(orig_options, options);
381 #ifdef HAVE_SERVER_SUPPORT
382 /* Add mgsnids from ldd params */
383 static int add_mgsnids(struct mount_opts *mop, char *options,
384 const char *params, size_t options_len)
386 char *ptr = (char *)params;
390 while ((ptr = strstr(ptr, PARAM_MGSNODE)) != NULL) {
391 sep = strchr(ptr, ' ');
396 rc = append_option(options, options_len, ptr, NULL);
399 mop->mo_have_mgsnid++;
412 static int clear_update_ondisk(char *source, struct lustre_disk_data *ldd)
414 char wanted_mountopts[512] = "";
415 struct mkfs_opts mkop;
419 memset(&mkop, 0, sizeof(mkop));
421 mkop.mo_ldd.ldd_flags &= ~LDD_F_UPDATE;
422 mkop.mo_flags = MO_NOHOSTID_CHECK; /* Ignore missing hostid */
423 if (strlen(source) > sizeof(mkop.mo_device) - 1) {
425 fprintf(stderr, "Device name too long: %s\n", source);
428 strncpy(mkop.mo_device, source, sizeof(mkop.mo_device));
430 ret = osd_prepare_lustre(&mkop,
431 wanted_mountopts, sizeof(wanted_mountopts));
434 fprintf(stderr, "Can't prepare device %s: %s\n",
435 source, strerror(ret));
439 /* Create the loopback file */
440 if (mkop.mo_flags & MO_IS_LOOP) {
441 ret = access(mkop.mo_device, F_OK);
445 fprintf(stderr, "Can't access device %s: %s\n",
446 source, strerror(ret));
450 ret = loop_setup(&mkop);
453 fprintf(stderr, "Loop device setup for %s failed: %s\n",
454 mkop.mo_device, strerror(ret));
458 ret = osd_write_ldd(&mkop);
461 fprintf(stderr, "failed to write local files: %s\n",
465 ret2 = loop_cleanup(&mkop);
472 static int parse_ldd(char *source, struct mount_opts *mop,
473 char *options, size_t options_len)
475 struct lustre_disk_data *ldd = &mop->mo_ldd;
480 rc = osd_is_lustre(source, &ldd->ldd_mount_type);
483 "%s: %s has not been formatted with mkfs.lustre or the backend filesystem type is not supported by this tool\n",
488 rc = osd_read_ldd(source, ldd);
491 "%s: %s failed to read permanent mount data: %s\n",
492 progname, source, rc >= 0 ? strerror(rc) : "");
496 if ((IS_MDT(ldd) || IS_OST(ldd)) &&
497 (ldd->ldd_flags & LDD_F_NEED_INDEX)) {
499 "%s: %s has no index assigned (probably formatted with old mkfs)\n",
504 if (ldd->ldd_flags & LDD_F_UPDATE)
505 clear_update_ondisk(source, ldd);
507 /* Since we never rewrite ldd, ignore temp flags */
508 ldd->ldd_flags &= ~(LDD_F_VIRGIN | LDD_F_WRITECONF);
510 /* This is to make sure default options go first */
511 temp_options = strdup(options);
513 fprintf(stderr, "%s: can't allocate memory for temp_options\n",
517 strncpy(options, ldd->ldd_mount_opts, options_len);
518 rc = append_option(options, options_len, temp_options, NULL);
523 /* svname of the form lustre:OST1234 means never registered */
524 rc = strlen(ldd->ldd_svname);
525 if (strcmp(ldd->ldd_svname, "MGS") != 0) {
527 fprintf(stderr, "%s: invalid name '%s'\n",
528 progname, ldd->ldd_svname);
530 } else if (ldd->ldd_svname[rc - 8] == ':') {
531 ldd->ldd_svname[rc - 8] = '-';
532 ldd->ldd_flags |= LDD_F_VIRGIN;
533 } else if (ldd->ldd_svname[rc - 8] == '=') {
534 ldd->ldd_svname[rc - 8] = '-';
535 ldd->ldd_flags |= LDD_F_WRITECONF;
538 /* backend osd type */
539 rc = append_option(options, options_len, "osd=",
540 mt_type(ldd->ldd_mount_type));
544 if (!mop->mo_have_mgsnid) {
546 * Only use disk data if mount -o mgsnode=nid wasn't
549 if (ldd->ldd_flags & LDD_F_SV_TYPE_MGS) {
550 rc = append_option(options, options_len, "mgs", NULL);
553 mop->mo_have_mgsnid++;
555 if (add_mgsnids(mop, options, ldd->ldd_params,
560 /* Better have an mgsnid by now */
561 if (!mop->mo_have_mgsnid) {
562 fprintf(stderr, "%s: missing option mgsnode=<nid>\n",
567 if (ldd->ldd_flags & LDD_F_VIRGIN) {
568 rc = append_option(options, options_len, "virgin", NULL);
572 if (ldd->ldd_flags & LDD_F_UPDATE) {
573 rc = append_option(options, options_len, "update", NULL);
577 if (ldd->ldd_flags & LDD_F_WRITECONF) {
578 rc = append_option(options, options_len, "writeconf", NULL);
582 if (ldd->ldd_flags & LDD_F_NO_PRIMNODE) {
583 rc = append_option(options, options_len, "noprimnode", NULL);
589 * prefix every lustre parameter with param= so that in-kernel
590 * mount can recognize them properly and send to MGS at registration
592 start = ldd->ldd_params;
593 while (start && *start != '\0') {
594 while (*start == ' ')
599 start = strchr(cur, ' ');
604 rc = append_option(options, options_len, "param=", cur);
609 /* svname must be last option */
610 rc = append_option(options, options_len, "svname=", ldd->ldd_svname);
614 #endif /* HAVE_SERVER_SUPPORT */
616 static void set_defaults(struct mount_opts *mop)
618 memset(mop, 0, sizeof(*mop));
619 mop->mo_usource = NULL;
620 mop->mo_source = NULL;
625 mop->mo_have_mgsnid = 0;
626 mop->mo_md_stripe_cache_size = 16384;
627 mop->mo_orig_options = "";
629 mop->mo_max_sectors_kb = -1;
632 static int parse_opts(int argc, char *const argv[], struct mount_opts *mop)
634 static struct option long_opts[] = {
635 { .val = 1, .name = "force", .has_arg = no_argument },
636 { .val = 'f', .name = "fake", .has_arg = no_argument },
637 { .val = 'h', .name = "help", .has_arg = no_argument },
638 { .val = 'n', .name = "nomtab", .has_arg = no_argument },
639 { .val = 'o', .name = "options", .has_arg = required_argument },
640 { .val = 'v', .name = "verbose", .has_arg = no_argument },
641 { .val = 'V', .name = "version", .has_arg = no_argument },
643 char real_path[PATH_MAX] = {'\0'};
645 char path[256], name[256];
650 while ((opt = getopt_long(argc, argv, "fhno:vV",
651 long_opts, NULL)) != EOF){
655 printf("force: %d\n", mop->mo_force);
659 printf("fake: %d\n", mop->mo_fake);
666 printf("nomtab: %d\n", mop->mo_nomtab);
669 mop->mo_orig_options = optarg;
676 fprintf(stdout, "%s %s %s\n", progname,
677 LUSTRE_VERSION_STRING, WITH_LIBMOUNT);
680 fprintf(stderr, "%s: unknown option '%c'\n",
687 if (optind + 2 > argc) {
688 fprintf(stderr, "%s: too few arguments\n", progname);
692 mop->mo_usource = argv[optind];
693 if (!mop->mo_usource)
697 * Try to get the real path to the device, in case it is a
698 * symbolic link for instance
700 if (realpath(mop->mo_usource, real_path) != NULL) {
701 ptr = strrchr(real_path, '/');
702 if (ptr && strncmp(ptr, "/dm-", 4) == 0 &&
703 isdigit(*(ptr + 4))) {
704 snprintf(path, sizeof(path), "/sys/block/%s/dm/name",
706 if ((f = fopen(path, "r"))) {
707 /* read "<name>\n" from sysfs */
708 if (fgets(name, sizeof(name), f) &&
709 (sz = strlen(name)) > 1) {
711 snprintf(real_path, sizeof(real_path),
712 "/dev/mapper/%s", name);
717 mop->mo_usource = strdup(real_path);
720 ptr = strstr(mop->mo_usource, ":/");
722 mop->mo_source = convert_hostnames(mop->mo_usource);
726 mop->mo_source = strdup(mop->mo_usource);
729 if (realpath(argv[optind + 1], mop->mo_target) == NULL) {
731 fprintf(stderr, "warning: %s: cannot resolve: %s\n",
732 argv[optind + 1], strerror(errno));
739 #ifdef HAVE_SERVER_SUPPORT
741 * change label from <fsname>:<index> to
742 * <fsname>-<index> to indicate the device has
743 * been registered. only if the label is
744 * supposed to be changed and target service
745 * is supposed to start
747 static void label_lustre(struct mount_opts *mop)
752 if (mop->mo_ldd.ldd_flags & (LDD_F_VIRGIN | LDD_F_WRITECONF)) {
753 (void)osd_label_lustre(mop);
755 struct lustre_disk_data ldd;
759 * device label could be changed after journal recovery,
760 * it should also be relabeled for mount has succeeded.
762 memset(&ldd, 0, sizeof(ldd));
763 ldd.ldd_mount_type = mop->mo_ldd.ldd_mount_type;
764 rc = osd_read_ldd(mop->mo_source, &ldd);
766 rc = strlen(ldd.ldd_svname);
767 if (rc >= 8 && ldd.ldd_svname[rc - 8] != '-')
768 (void)osd_label_lustre(mop);
772 #endif /* HAVE_SERVER_SUPPORT */
774 int main(int argc, char *const argv[])
776 struct mount_opts mop;
784 progname = strrchr(argv[0], '/');
785 progname = progname ? progname + 1 : argv[0];
789 g_pagesize = sysconf(_SC_PAGESIZE);
790 if (g_pagesize == -1) {
792 printf("error: %d failed to get page size.\n", rc);
795 maxopt_len = MIN(g_pagesize, 64 * 1024);
797 rc = parse_opts(argc, argv, &mop);
802 for (i = 0; i < argc; i++)
803 printf("arg[%d] = %s\n", i, argv[i]);
804 printf("source = %s (%s), target = %s\n", mop.mo_usource,
805 mop.mo_source, mop.mo_target);
806 printf("options = %s\n", mop.mo_orig_options);
809 options = malloc(maxopt_len);
811 fprintf(stderr, "can't allocate memory for options\n");
816 if (strlen(mop.mo_orig_options) >= maxopt_len) {
817 fprintf(stderr, "error: mount options too long\n");
822 strcpy(options, mop.mo_orig_options);
823 rc = parse_options(&mop, options, &flags, maxopt_len);
825 fprintf(stderr, "%s: can't parse options: %s\n",
831 rc = check_mtab_entry(mop.mo_usource, mop.mo_source,
832 mop.mo_target, "lustre");
833 if (rc && !(flags & MS_REMOUNT)) {
835 "%s: according to %s %s is already mounted on %s\n",
836 progname, MOUNTED, mop.mo_usource,
841 if (!rc && (flags & MS_REMOUNT)) {
843 "%s: according to %s %s is not already mounted on %s\n",
844 progname, MOUNTED, mop.mo_usource,
850 if (flags & MS_REMOUNT)
853 rc = access(mop.mo_target, F_OK);
856 fprintf(stderr, "%s: %s inaccessible: %s\n", progname,
857 mop.mo_target, strerror(errno));
861 client = (strstr(mop.mo_usource, ":/") != NULL);
863 #ifdef HAVE_SERVER_SUPPORT
868 rc = parse_ldd(mop.mo_source, &mop, options, maxopt_len);
878 * In Linux 2.4, the target device doesn't get passed to any of our
879 * functions. So we'll stick it on the end of the options.
881 rc = append_option(options, maxopt_len, "device=", mop.mo_source);
886 printf("mounting device %s at %s, flags=%#x options=%s\n",
887 mop.mo_source, mop.mo_target, flags, options);
889 #ifdef HAVE_SERVER_SUPPORT
890 if (!client && osd_tune_lustre(mop.mo_source, &mop)) {
893 "%s: unable to set tunables for %s (may cause reduced IO performance)\n",
894 argv[0], mop.mo_source);
898 if (mop.mo_skpath[0] != '\0') {
899 /* Treat shared key failures as fatal */
900 rc = load_shared_keys(&mop);
902 fprintf(stderr, "%s: Error loading shared keys: %s\n",
903 progname, strerror(rc));
907 #endif /* HAVE_GSS */
911 * flags and target get to lustre_get_sb(), but not
912 * lustre_fill_super(). Lustre ignores the flags, but mount
915 for (i = 0, rc = -EAGAIN; i <= mop.mo_retry && rc != 0; i++) {
916 rc = mount(mop.mo_source, mop.mo_target, "lustre",
917 flags, (void *)options);
921 "%s: mount %s at %s failed: %s retries left: %d\n",
923 mop.mo_usource, mop.mo_target,
929 int limit = i / 2 > 5 ? i / 2 : 5;
935 #ifdef HAVE_SERVER_SUPPORT
949 cli = strrchr(mop.mo_usource, ':');
950 if (cli && (strlen(cli) > 2))
955 fprintf(stderr, "%s: mount %s at %s failed: %s\n", progname,
956 mop.mo_usource, mop.mo_target, strerror(errno));
959 "Is the backend filesystem mounted?\n Check /etc/mtab and /proc/mounts\n");
962 "Are the lustre modules loaded?\n Check /etc/modprobe.conf and /proc/filesystems\n");
963 if (errno == ENOTBLK)
964 fprintf(stderr, "Do you need -o loop?\n");
965 if (errno == ENOMEDIUM)
967 "This filesystem needs at least 1 OST\n");
968 if (errno == ENOENT) {
969 fprintf(stderr, "Is the MGS specification correct?\n");
970 fprintf(stderr, "Is the filesystem name correct?\n");
972 "If upgrading, is the copied client log valid? (see upgrade docs)\n");
974 if (errno == EALREADY)
976 "The target service is already running. (%s)\n",
980 "The target service failed to start (bad config log?) (%s). See /var/log/messages.\n",
983 fprintf(stderr, "Is the MGS running?\n");
984 if (errno == EADDRINUSE)
986 "The target service's index is already in use. (%s)\n",
988 if (errno == EINVAL) {
989 fprintf(stderr, "This may have multiple causes.\n");
992 "Is '%s' the correct filesystem name?\n",
994 fprintf(stderr, "Are the mount options correct?\n");
995 fprintf(stderr, "Check the syslog for more info.\n");
998 /* May as well try to clean up loop devs */
999 if (strncmp(mop.mo_usource, "/dev/loop", 9) == 0) {
1003 sprintf(cmd, "/sbin/losetup -d %s", mop.mo_usource);
1004 if ((ret = system(cmd)) < 0)
1007 rc = WEXITSTATUS(ret);
1012 * Deal with utab just for client. Note that we ignore
1013 * the return value here since it is not worth to fail
1014 * mount by prevent some rare cases
1016 if (strstr(mop.mo_usource, ":/") != NULL)
1017 update_utab_entry(&mop);
1018 if (!mop.mo_nomtab) {
1019 rc = update_mtab_entry(mop.mo_usource, mop.mo_target,
1020 "lustre", mop.mo_orig_options,
1026 #ifdef HAVE_SERVER_SUPPORT
1034 /* mo_usource should be freed, but we can rely on the kernel */
1035 free(mop.mo_source);