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/
31 * lustre/utils/mount_lustre.c
33 * Author: Robert Read <rread@clusterfs.com>
34 * Author: Nathan Rutman <nathan@clusterfs.com>
49 #include <sys/mount.h>
50 #include <sys/param.h>
51 #include <linux/lustre/lustre_ver.h>
54 #if defined(HAVE_LUSTRE_CRYPTO) && defined(HAVE_LIBKEYUTILS)
57 #include <linux/lnet/nidstr.h>
58 #include <libcfs/util/string.h>
61 #include "mount_utils.h"
63 #define MAX_RETRIES 99
69 static void usage(FILE *out)
72 "\nThis mount helper should only be invoked via the mount (8) command,\ne.g. mount -t lustre dev dir\n\n");
73 fprintf(out, "usage: %s [-fhnvV] [-o <srvopt>] <device> <mountpt>\n",
75 fprintf(out, "usage: %s [-fhnvV] [-o <cliopt>] <mgstarget> <mountpt>\n",
78 "\t<device>: the local disk device when mounting a server\n"
79 "\t<mgstarget>: the server MGS and filesystem for a client:\n"
80 "\t\t<mgsnid>[:<altmgsnid>...]:/<filesystem>[/<subdir>]\n"
81 "\t\t\t<mgsnid>: MGS LNet Node Identifier (e.g. mgs01@o2ib)\n"
82 "\t\t\t<filesystem>: Lustre filesystem name (e.g. lustre1)\n"
83 "\t\t\t<subdir>: subdirectory of the filesystem to mount\n"
84 "\t<mountpt>: filesystem mountpoint (e.g. /mnt/lustre)\n"
85 "\t-f|--fake: fake mount (only update /etc/mtab)\n"
86 "\t-o force|--force: force mount even if already in /etc/mtab\n"
87 "\t-h|--help: print this usage message\n"
88 "\t-n|--nomtab: do not update /etc/mtab after mount\n"
89 "\t-v|--verbose: print verbose config settings\n"
90 "\t-V|--version: output build version of the utility and exit\n"
91 "\tdefault options are marked below with '*'\n"
92 "\t\t(no)flock: disable* or enable POSIX flock support\n"
93 "\t\t(no)user_xattr: disable or enable* user xattr namespace\n"
94 "\t<srvopt>: one or more comma separated server options:\n"
95 "\t\t(no)acl: disable or enable* POSIX ACL support completely\n"
96 "\t\tabort_recov: abort server recovery handling\n"
97 "\t\tnosvc: only start MGC/MGS without starting MDS/OSS\n"
98 "\t\tnomgs: only start target MDS/OSS, using existing MGS\n"
99 "\t\tnoscrub: do NOT auto start OI scrub unless requested\n"
100 "\t\tskip_lfsck: do NOT auto resume paused/crashed LFSCK\n"
101 "\t\tmax_sectors_kb=<size>: set device max_sectors_kb to size or leaves it untouched if size=0\n"
102 "\t\t\tIf not specified, device max_sectors_kb will be set to max_hw_sectors_kb\n"
103 "\t\tmd_stripe_cache_size=<num>: set MD RAID device stripe cache size\n"
104 "\t<cliopt>: one or more comma separated client options:\n"
105 "\t\texclude=<ostname>[:<ostname>]: list of inactive OSTs (e.g. lustre-OST0001)\n"
106 "\t\tlocalflock: enable POSIX flock only on local client\n"
107 "\t\tretry=<num>: number of times mount is retried by client\n"
109 "\t\tskpath=<file|directory>: path of keys to load into kernel keyring\n"
111 "\t\t(no)user_fid2path: disable* or enable user $MOUNT/.lustre/fid access\n"
112 "\t\t(no)checksum: disable or enable* data checksums\n"
113 "\t\t(no)lruresize: disable or enable* LDLM dynamic LRU size\n"
114 "\t\t(no)lazystatfs: disable or enable* statfs to work if OST is unavailable\n"
115 "\t\t32bitapi: return only 32-bit inode numbers to userspace\n"
116 "\t\t(no)verbose: disable or enable* messages at filesystem (un,re)mount\n"
117 #ifdef HAVE_LUSTRE_CRYPTO
118 #ifdef HAVE_LIBKEYUTILS
119 "\t\ttest_dummy_encryption: enable test dummy encryption mode\n"
121 "\t\tnoencrypt: disable client side encryption\n"
124 exit((out != stdout) ? EINVAL : 0);
127 /*****************************************************************************
129 * This part was cribbed from util-linux/mount/mount.c. There was no clear
130 * license information, but many other files in the package are identified as
131 * GNU GPL, so it's a pretty safe bet that was their intent.
133 ****************************************************************************/
135 const char *opt; /* option name */
136 int inv; /* true if flag value should be inverted */
137 int mask; /* flag mask value */
140 static const struct opt_map opt_map[] = {
141 /* these flags are parsed by mount, not Lustre */
142 { .opt = "async", .mask = MS_SYNCHRONOUS, .inv = 1 }, /* asynchronous I/O */
143 { .opt = "atime", .mask = MS_NOATIME, .inv = 1 }, /* set access time */
144 { .opt = "auto" }, /* allow auto mount */
145 { .opt = "defaults" }, /* default options */
146 { .opt = "dev", .mask = MS_NODEV, .inv = 1 }, /* interpret devs */
147 { .opt = "exec", .mask = MS_NOEXEC, .inv = 1 }, /* allow execution */
149 { .opt = "noatime", .mask = MS_NOATIME }, /* do not set atime */
150 { .opt = "noauto" }, /* mount explicitly */
151 { .opt = "nodev", .mask = MS_NODEV }, /* no interpret devs */
152 { .opt = "noowner", .inv = 1 }, /* no special privs */
153 { .opt = "nosuid", .mask = MS_NOSUID }, /* do not honor suid */
154 { .opt = "nouser", .inv = 1 }, /* users cannot mount */
155 { .opt = "nousers", .inv = 1 }, /* users cannot mount */
156 { .opt = "_netdev" }, /* network only */
157 { .opt = "noexec", .mask = MS_NOEXEC }, /* no execute */
158 { .opt = "remount", .mask = MS_REMOUNT }, /* remount */
159 { .opt = "ro", .mask = MS_RDONLY }, /* read-only */
160 { .opt = "rw", .mask = MS_RDONLY, .inv = 1 }, /* read-write */
161 { .opt = "suid", .mask = MS_NOSUID, .inv = 1 }, /* honor suid */
162 { .opt = "sync", .mask = MS_SYNCHRONOUS }, /* synchronous I/O */
164 { .opt = "diratime", /* set access time */
165 .mask = MS_NODIRATIME, .inv = 1 }, /* on read */
166 { .opt = "nodiratime", /* do not set access */
167 .mask = MS_NODIRATIME }, /* time on read */
170 { .opt = "norelatime", /* do not set rel */
171 .mask = MS_RELATIME, .inv = 1 }, /* access time */
172 { .opt = "relatime", /* set relative */
173 .mask = MS_RELATIME }, /* access time */
175 #ifdef MS_STRICTATIME
176 { .opt = "strictatime",
177 .mask = MS_STRICTATIME }, /* strict access time */
180 /****************************************************************************/
183 * 1 = don't pass on to lustre
184 * 0 = pass on to lustre
186 static int parse_one_option(const char *check, int *flagp)
188 const struct opt_map *opt;
190 for (opt = &opt_map[0]; opt->opt != NULL; opt++) {
191 if (strncmp(check, opt->opt, strlen(opt->opt)) == 0) {
194 *flagp &= ~(opt->mask);
202 * Assume any unknown options are valid and pass them on. The mount
203 * will fail if lmd_parse, ll_options or ldiskfs doesn't recognize it.
208 static size_t merge_strings(char *dst, const char *src, size_t size)
210 size_t dsize = strlen(dst);
211 size_t len = strlen(src);
212 size_t ret = dsize + len;
218 memcpy(dst, src, len);
223 static int append_option(char *options, size_t options_len,
224 const char *param, const char *value)
228 if (options[0] != '\0') {
229 rc = merge_strings(options, ",", options_len);
230 if (rc >= options_len)
234 rc = merge_strings(options, param, options_len);
235 if (rc >= options_len)
239 rc = merge_strings(options, value, options_len);
240 if (rc >= options_len)
245 fprintf(stderr, "error: mount options %s%s too long\n", param, value);
250 * Replace options with subset of Lustre-specific options, and
251 * fill in mount flags
253 static int parse_options(struct mount_opts *mop, char *orig_options,
254 int *flagp, size_t options_len)
256 char *options, *opt, *nextopt, *arg, *val;
259 options = calloc(strlen(orig_options) + 1, 1);
264 nextopt = orig_options;
265 while ((opt = strsep(&nextopt, ","))) {
270 /* Handle retries in a slightly different manner */
272 val = strchr(opt, '=');
274 * please note that some ldiskfs mount options are also in
275 * the form of param=value. We should pay attention not to
276 * remove those mount options, see bug 22097.
278 if (val && strncmp(arg, "max_sectors_kb", 14) == 0) {
279 mop->mo_max_sectors_kb = atoi(val + 1);
281 strncmp(arg, "md_stripe_cache_size", 20) == 0) {
282 mop->mo_md_stripe_cache_size = atoi(val + 1);
283 } else if (val && strncmp(arg, "retry", 5) == 0) {
284 mop->mo_retry = atoi(val + 1);
285 if (mop->mo_retry > MAX_RETRIES)
286 mop->mo_retry = MAX_RETRIES;
287 else if (mop->mo_retry < 0)
289 } else if (val && strncmp(arg, "mgssec", 6) == 0) {
290 rc = append_option(options, options_len, opt, NULL);
293 } else if (strncmp(arg, "nosvc", 5) == 0) {
295 rc = append_option(options, options_len, opt, NULL);
298 } else if (strcmp(opt, "force") == 0) {
299 /* XXX special check for 'force' option */
301 printf("force: %d\n", mop->mo_force);
303 } else if (val && strncmp(opt, "skpath=", 7) == 0) {
304 if (strlen(val) + 1 >= sizeof(mop->mo_skpath)) {
306 "%s: shared key path too long\n",
311 strncpy(mop->mo_skpath, val + 1,
312 sizeof(mop->mo_skpath) - 1);
314 #ifdef HAVE_LUSTRE_CRYPTO
315 } else if (strncmp(arg, "test_dummy_encryption", 21) == 0) {
316 #ifdef HAVE_LIBKEYUTILS
317 #ifdef HAVE_FSCRYPT_DUMMY_CONTEXT_ENABLED
318 /* Using dummy encryption mode requires inserting a
319 * special dummy key into the session keyring.
320 * Key type is "logon", key description is
321 * "fscrypt:4242424242424242", and key payload has to be
322 * in the form <mode><raw><size>, where:
323 * <mode> is "\x00\x00\x00\x00"
324 * <raw> is "$(printf ""\\\\x%02x"" {0..63})"
325 * <size> is "\x40\x00\x00\x00" for little endian,
326 * "\x00\x00\x00\x40" for big endian.
329 int *p = (int *)payload;
330 char *q = (char *)(p + 1);
340 key = add_key("logon", "fscrypt:4242424242424242",
341 (const void *)payload, sizeof(payload),
342 KEY_SPEC_SESSION_KEYRING);
346 "%s: test dummy encryption option ignored: could not insert dummy encryption key into session keyring\n",
349 /* pass this on as an option */
350 rc = append_option(options, options_len, opt,
355 #else /* !HAVE_FSCRYPT_DUMMY_CONTEXT_ENABLED */
356 /* pass this on as an option */
357 rc = append_option(options, options_len, opt,
362 #else /* HAVE_LIBKEYUTILS */
364 "%s: test dummy encryption option ignored: Lustre not built with libkeyutils support\n",
368 } else if (parse_one_option(opt, flagp) == 0) {
369 /* pass this on as an option */
370 rc = append_option(options, options_len, opt, NULL);
375 #ifdef MS_STRICTATIME
376 #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(3, 2, 53, 0)
379 * In the future when upstream fixes land in all supported kernels
380 * we should stop forcing MS_STRICTATIME in lustre mounts.
381 * We override the kernel level default of MS_RELATIME for now
382 * due to a kernel vfs level bug in atime updates that fails
383 * to reset timestamps from the future.
385 #warn "remove MS_STRICTATIME override if kernel updates atime from the future"
388 * set strictatime to default if NOATIME or RELATIME
391 if (!(*flagp & (MS_NOATIME | MS_RELATIME)))
392 *flagp |= MS_STRICTATIME;
394 strcpy(orig_options, options);
401 #ifdef HAVE_SERVER_SUPPORT
402 /* Add mgsnids from ldd params */
403 static int add_mgsnids(struct mount_opts *mop, char *options,
404 const char *params, size_t options_len)
406 char *ptr = (char *)params;
410 while ((ptr = strstr(ptr, PARAM_MGSNODE)) != NULL) {
411 sep = strchr(ptr, ' ');
416 rc = append_option(options, options_len, ptr, NULL);
419 mop->mo_have_mgsnid++;
432 static int clear_update_ondisk(char *source, struct lustre_disk_data *ldd)
434 char wanted_mountopts[512] = "";
435 struct mkfs_opts mkop;
439 memset(&mkop, 0, sizeof(mkop));
441 mkop.mo_ldd.ldd_flags &= ~LDD_F_UPDATE;
442 mkop.mo_flags = MO_NOHOSTID_CHECK; /* Ignore missing hostid */
443 if (strlen(source) > sizeof(mkop.mo_device) - 1) {
445 fprintf(stderr, "Device name too long: %s\n", source);
448 strncpy(mkop.mo_device, source, sizeof(mkop.mo_device));
450 ret = osd_prepare_lustre(&mkop,
451 wanted_mountopts, sizeof(wanted_mountopts));
454 fprintf(stderr, "Can't prepare device %s: %s\n",
455 source, strerror(ret));
459 /* Create the loopback file */
460 if (mkop.mo_flags & MO_IS_LOOP) {
461 ret = access(mkop.mo_device, F_OK);
465 fprintf(stderr, "Can't access device %s: %s\n",
466 source, strerror(ret));
470 ret = loop_setup(&mkop);
473 fprintf(stderr, "Loop device setup for %s failed: %s\n",
474 mkop.mo_device, strerror(ret));
478 ret = osd_write_ldd(&mkop);
481 fprintf(stderr, "failed to write local files: %s\n",
485 ret2 = loop_cleanup(&mkop);
492 static int parse_ldd(char *source, struct mount_opts *mop,
493 char *options, size_t options_len)
495 struct lustre_disk_data *ldd = &mop->mo_ldd;
500 rc = osd_is_lustre(source, &ldd->ldd_mount_type);
503 "%s: %s has not been formatted with mkfs.lustre or the backend filesystem type is not supported by this tool\n",
508 rc = osd_read_ldd(source, ldd);
511 "%s: %s failed to read permanent mount data: %s\n",
512 progname, source, rc >= 0 ? strerror(rc) : "");
516 if ((IS_MDT(ldd) || IS_OST(ldd)) &&
517 (ldd->ldd_flags & LDD_F_NEED_INDEX)) {
519 "%s: %s has no index assigned (probably formatted with old mkfs)\n",
524 if (ldd->ldd_flags & LDD_F_UPDATE)
525 clear_update_ondisk(source, ldd);
527 /* Since we never rewrite ldd, ignore temp flags */
528 ldd->ldd_flags &= ~(LDD_F_VIRGIN | LDD_F_WRITECONF |
529 LDD_F_NO_LOCAL_LOGS);
531 /* This is to make sure default options go first */
532 temp_options = strdup(options);
534 fprintf(stderr, "%s: can't allocate memory for temp_options\n",
538 strncpy(options, ldd->ldd_mount_opts, options_len);
539 rc = append_option(options, options_len, temp_options, NULL);
544 /* svname of the form lustre:OST1234 means never registered */
545 rc = strlen(ldd->ldd_svname);
546 if (strcmp(ldd->ldd_svname, "MGS") != 0) {
548 fprintf(stderr, "%s: invalid name '%s'\n",
549 progname, ldd->ldd_svname);
551 } else if (ldd->ldd_svname[rc - 8] == ':') {
552 ldd->ldd_svname[rc - 8] = '-';
553 ldd->ldd_flags |= LDD_F_VIRGIN;
554 } else if (ldd->ldd_svname[rc - 8] == '=') {
555 ldd->ldd_svname[rc - 8] = '-';
556 ldd->ldd_flags |= LDD_F_WRITECONF;
557 } else if (ldd->ldd_svname[rc - 8] == '+') {
558 ldd->ldd_svname[rc - 8] = '-';
559 ldd->ldd_flags |= LDD_F_NO_LOCAL_LOGS;
562 /* backend osd type */
563 rc = append_option(options, options_len, "osd=",
564 mt_type(ldd->ldd_mount_type));
568 if (!mop->mo_have_mgsnid) {
570 * Only use disk data if mount -o mgsnode=nid wasn't
573 if (ldd->ldd_flags & LDD_F_SV_TYPE_MGS) {
574 rc = append_option(options, options_len, "mgs", NULL);
577 mop->mo_have_mgsnid++;
579 if (add_mgsnids(mop, options, ldd->ldd_params,
584 /* Better have an mgsnid by now */
585 if (!mop->mo_have_mgsnid) {
586 fprintf(stderr, "%s: missing option mgsnode=<nid>\n",
591 if (ldd->ldd_flags & LDD_F_VIRGIN) {
592 rc = append_option(options, options_len, "virgin", NULL);
596 if (ldd->ldd_flags & LDD_F_UPDATE) {
597 rc = append_option(options, options_len, "update", NULL);
601 if (ldd->ldd_flags & LDD_F_WRITECONF) {
602 rc = append_option(options, options_len, "writeconf", NULL);
606 if (ldd->ldd_flags & LDD_F_NO_LOCAL_LOGS) {
607 rc = append_option(options, options_len, "nolocallogs", NULL);
611 if (ldd->ldd_flags & LDD_F_NO_PRIMNODE) {
612 rc = append_option(options, options_len, "noprimnode", NULL);
618 * prefix every lustre parameter with param= so that in-kernel
619 * mount can recognize them properly and send to MGS at registration
621 start = ldd->ldd_params;
622 while (start && *start != '\0') {
623 while (*start == ' ')
628 start = strchr(cur, ' ');
633 rc = append_option(options, options_len, "param=", cur);
638 /* svname must be last option */
639 rc = append_option(options, options_len, "svname=", ldd->ldd_svname);
643 #endif /* HAVE_SERVER_SUPPORT */
645 static void set_defaults(struct mount_opts *mop)
647 memset(mop, 0, sizeof(*mop));
648 mop->mo_usource = NULL;
649 mop->mo_source = NULL;
654 mop->mo_have_mgsnid = 0;
655 mop->mo_md_stripe_cache_size = 16384;
656 mop->mo_orig_options = "";
658 mop->mo_max_sectors_kb = -1;
661 static int parse_opts(int argc, char *const argv[], struct mount_opts *mop)
663 static struct option long_opts[] = {
664 { .val = 1, .name = "force", .has_arg = no_argument },
665 { .val = 'f', .name = "fake", .has_arg = no_argument },
666 { .val = 'h', .name = "help", .has_arg = no_argument },
667 { .val = 'n', .name = "nomtab", .has_arg = no_argument },
668 { .val = 'o', .name = "options", .has_arg = required_argument },
669 { .val = 'v', .name = "verbose", .has_arg = no_argument },
670 { .val = 'V', .name = "version", .has_arg = no_argument },
672 char real_path[PATH_MAX] = {'\0'};
674 char path[256], name[256];
679 while ((opt = getopt_long(argc, argv, "fhno:vV",
680 long_opts, NULL)) != EOF){
684 printf("force: %d\n", mop->mo_force);
688 printf("fake: %d\n", mop->mo_fake);
695 printf("nomtab: %d\n", mop->mo_nomtab);
698 mop->mo_orig_options = optarg;
705 fprintf(stdout, "%s %s (libmount)\n", progname,
706 LUSTRE_VERSION_STRING);
709 fprintf(stderr, "%s: unknown option '%c'\n",
716 if (optind + 2 > argc) {
717 fprintf(stderr, "%s: too few arguments\n", progname);
721 mop->mo_usource = argv[optind];
722 if (!mop->mo_usource)
726 * Try to get the real path to the device, in case it is a
727 * symbolic link for instance
729 if (realpath(mop->mo_usource, real_path) != NULL) {
730 ptr = strrchr(real_path, '/');
731 if (ptr && strncmp(ptr, "/dm-", 4) == 0 &&
732 isdigit(*(ptr + 4))) {
733 snprintf(path, sizeof(path), "/sys/block/%s/dm/name",
735 if ((f = fopen(path, "r"))) {
736 /* read "<name>\n" from sysfs */
737 if (fgets(name, sizeof(name), f) &&
738 (sz = strlen(name)) > 1) {
740 snprintf(real_path, sizeof(real_path),
741 "/dev/mapper/%s", name);
746 mop->mo_usource = strdup(real_path);
749 ptr = strstr(mop->mo_usource, ":/");
751 mop->mo_source = convert_hostnames(mop->mo_usource, true);
755 mop->mo_source = strdup(mop->mo_usource);
758 if (realpath(argv[optind + 1], mop->mo_target) == NULL) {
760 fprintf(stderr, "warning: %s: cannot resolve: %s\n",
761 argv[optind + 1], strerror(errno));
768 #ifdef HAVE_SERVER_SUPPORT
770 * change label from <fsname>:<index> to
771 * <fsname>-<index> to indicate the device has
772 * been registered. only if the label is
773 * supposed to be changed and target service
774 * is supposed to start
776 static void label_lustre(struct mount_opts *mop)
781 if (mop->mo_ldd.ldd_flags & (LDD_F_VIRGIN | LDD_F_WRITECONF |
782 LDD_F_NO_LOCAL_LOGS)) {
783 (void)osd_label_lustre(mop);
785 struct lustre_disk_data ldd;
789 * device label could be changed after journal recovery,
790 * it should also be relabeled for mount has succeeded.
792 memset(&ldd, 0, sizeof(ldd));
793 ldd.ldd_mount_type = mop->mo_ldd.ldd_mount_type;
794 rc = osd_read_ldd(mop->mo_source, &ldd);
796 rc = strlen(ldd.ldd_svname);
797 if (rc >= 8 && ldd.ldd_svname[rc - 8] != '-')
798 (void)osd_label_lustre(mop);
802 #endif /* HAVE_SERVER_SUPPORT */
804 int main(int argc, char *const argv[])
806 struct mount_opts mop;
814 progname = strrchr(argv[0], '/');
815 progname = progname ? progname + 1 : argv[0];
819 g_pagesize = sysconf(_SC_PAGESIZE);
820 if (g_pagesize == -1) {
822 printf("error: %d failed to get page size.\n", rc);
825 maxopt_len = MIN(g_pagesize, 64 * 1024);
827 rc = parse_opts(argc, argv, &mop);
832 for (i = 0; i < argc; i++)
833 printf("arg[%d] = %s\n", i, argv[i]);
834 printf("source = %s (%s), target = %s\n", mop.mo_usource,
835 mop.mo_source, mop.mo_target);
836 printf("options = %s\n", mop.mo_orig_options);
839 options = malloc(maxopt_len);
841 fprintf(stderr, "can't allocate memory for options\n");
846 if (strlen(mop.mo_orig_options) >= maxopt_len) {
847 fprintf(stderr, "error: mount options too long\n");
852 strcpy(options, mop.mo_orig_options);
853 rc = parse_options(&mop, options, &flags, maxopt_len);
855 fprintf(stderr, "%s: can't parse options: %s\n",
861 rc = check_mtab_entry(mop.mo_usource, mop.mo_source,
862 mop.mo_target, "lustre");
863 if (rc && !(flags & MS_REMOUNT)) {
865 "%s: according to %s %s is already mounted on %s\n",
866 progname, MOUNTED, mop.mo_usource,
871 if (!rc && (flags & MS_REMOUNT)) {
873 "%s: according to %s %s is not already mounted on %s\n",
874 progname, MOUNTED, mop.mo_usource,
880 if (flags & MS_REMOUNT)
883 rc = access(mop.mo_target, F_OK);
886 fprintf(stderr, "%s: %s inaccessible: %s\n", progname,
887 mop.mo_target, strerror(errno));
891 client = (strstr(mop.mo_usource, ":/") != NULL);
893 #ifdef HAVE_SERVER_SUPPORT
898 rc = parse_ldd(mop.mo_source, &mop, options, maxopt_len);
903 fprintf(stderr, "%s: cannot mount %s: no server support\n",
904 progname, mop.mo_usource);
910 * In Linux 2.4, the target device doesn't get passed to any of our
911 * functions. So we'll stick it on the end of the options.
913 rc = append_option(options, maxopt_len, "device=", mop.mo_source);
918 printf("mounting device %s at %s, flags=%#x options=%s\n",
919 mop.mo_source, mop.mo_target, flags, options);
921 #ifdef HAVE_SERVER_SUPPORT
922 if (!client && osd_tune_lustre(mop.mo_source, &mop)) {
925 "%s: unable to set tunables for %s (may cause reduced IO performance)\n",
926 argv[0], mop.mo_source);
930 if (mop.mo_skpath[0] != '\0') {
931 /* Treat shared key failures as fatal */
932 rc = load_shared_keys(&mop);
934 fprintf(stderr, "%s: Error loading shared keys: %s\n",
935 progname, strerror(rc));
939 #endif /* HAVE_GSS */
944 /* Prefer filesystem type given on mount command line
945 * so it appears correctly in the /proc/mounts output.
947 if (strstr(argv[0], "mount.lustre_tgt"))
948 fstype = "lustre_tgt";
952 * flags and target get to lustre_get_sb(), but not
953 * lustre_fill_super(). Lustre ignores the flags, but mount
956 for (i = 0, rc = -EAGAIN; i <= mop.mo_retry && rc != 0; i++) {
957 rc = mount(mop.mo_source, mop.mo_target, fstype,
958 flags, (void *)options);
962 "%s: mount -t %s %s at %s failed: %s retries left: %d\n",
963 basename(progname), fstype,
964 mop.mo_usource, mop.mo_target,
969 /* Pre-2.13 Lustre without 'lustre_tgt' type?
970 * Try with 'lustre' instead. Eventually this
971 * can be removed (e.g. 2.18 or whenever).
973 if (errno == ENODEV &&
974 strcmp(fstype, "lustre_tgt") == 0) {
981 int limit = i / 2 > 5 ? i / 2 : 5;
987 #ifdef HAVE_SERVER_SUPPORT
1001 cli = strrchr(mop.mo_usource, ':');
1002 if (cli && (strlen(cli) > 2))
1007 fprintf(stderr, "%s: mount %s at %s failed: %s\n", progname,
1008 mop.mo_usource, mop.mo_target, strerror(errno));
1011 "Is the backend filesystem mounted?\n Check /etc/mtab and /proc/mounts\n");
1012 if (errno == ENODEV)
1014 "Are the lustre modules loaded?\n Check /etc/modprobe.conf and /proc/filesystems\n");
1015 if (errno == ENOTBLK)
1016 fprintf(stderr, "Do you need -o loop?\n");
1017 if (errno == ENOMEDIUM)
1019 "This filesystem needs at least 1 OST\n");
1020 if (errno == ENOENT) {
1021 fprintf(stderr, "Is the MGS specification correct?\n");
1022 fprintf(stderr, "Is the filesystem name correct?\n");
1024 "If upgrading, is the copied client log valid? (see upgrade docs)\n");
1026 if (errno == EALREADY)
1028 "The target service is already running. (%s)\n",
1032 "The target service failed to start (bad config log?) (%s). See /var/log/messages.\n",
1035 fprintf(stderr, "Is the MGS running?\n");
1036 if (errno == EADDRINUSE)
1038 "The target service's index is already in use. (%s)\n",
1040 if (errno == EINVAL) {
1041 fprintf(stderr, "This may have multiple causes.\n");
1044 "Is '%s' the correct filesystem name?\n",
1046 fprintf(stderr, "Are the mount options correct?\n");
1047 fprintf(stderr, "Check the syslog for more info.\n");
1050 /* May as well try to clean up loop devs */
1051 if (strncmp(mop.mo_usource, "/dev/loop", 9) == 0) {
1055 sprintf(cmd, "/sbin/losetup -d %s", mop.mo_usource);
1056 if ((ret = system(cmd)) < 0)
1059 rc = WEXITSTATUS(ret);
1064 * Deal with utab just for client. Note that we ignore
1065 * the return value here since it is not worth to fail
1066 * mount by prevent some rare cases
1068 if (strstr(mop.mo_usource, ":/") != NULL)
1069 update_utab_entry(&mop);
1070 if (!mop.mo_nomtab) {
1071 rc = update_mtab_entry(mop.mo_usource, mop.mo_target,
1072 "lustre", mop.mo_orig_options,
1078 #ifdef HAVE_SERVER_SUPPORT
1086 /* mo_usource should be freed, but we can rely on the kernel */
1087 free(mop.mo_source);