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/obdclass/obd_mount.c
34 * Client mount routines
36 * Author: Nathan Rutman <nathan@clusterfs.com>
40 #define DEBUG_SUBSYSTEM S_CLASS
41 #define D_MOUNT (D_SUPER|D_CONFIG/*|D_WARNING */)
42 #define PRINT_CMD CDEBUG
45 #include <obd_class.h>
46 #include <linux/version.h>
47 #include <lustre_log.h>
48 #include <lustre_disk.h>
49 #include <uapi/linux/lustre/lustre_param.h>
51 static int (*client_fill_super)(struct super_block *sb,
52 struct vfsmount *mnt);
54 static void (*kill_super_cb)(struct super_block *sb);
56 /**************** config llog ********************/
58 /** Get a config log from the MGS and process it.
59 * This func is called for both clients and servers.
60 * Continue to process new statements appended to the logs
61 * (whenever the config lock is revoked) until lustre_end_log
63 * @param sb The superblock is used by the MGC to write to the local copy of
65 * @param logname The name of the llog to replicate from the MGS
66 * @param cfg Since the same mgc may be used to follow multiple config logs
67 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
68 * this log, and is added to the mgc's list of logs to follow.
70 int lustre_process_log(struct super_block *sb, char *logname,
71 struct config_llog_instance *cfg)
73 struct lustre_cfg *lcfg;
74 struct lustre_cfg_bufs *bufs;
75 struct lustre_sb_info *lsi = s2lsi(sb);
76 struct obd_device *mgc = lsi->lsi_mgc;
87 /* mgc_process_config */
88 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
89 lustre_cfg_bufs_set_string(bufs, 1, logname);
90 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
91 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
92 OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
94 GOTO(out, rc = -ENOMEM);
95 lustre_cfg_init(lcfg, LCFG_LOG_START, bufs);
97 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
98 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
103 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
104 "failed from the MGS (%d). Make sure this "
105 "client and the MGS are running compatible "
106 "versions of Lustre.\n",
107 mgc->obd_name, logname, rc);
109 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
110 "failed (%d). This may be the result of "
111 "communication errors between this node and "
112 "the MGS, a bad configuration, or other "
113 "errors. See the syslog for more "
114 "information.\n", mgc->obd_name, logname,
117 /* class_obd_list(); */
120 EXPORT_SYMBOL(lustre_process_log);
122 /* Stop watching this config log for updates */
123 int lustre_end_log(struct super_block *sb, char *logname,
124 struct config_llog_instance *cfg)
126 struct lustre_cfg *lcfg;
127 struct lustre_cfg_bufs bufs;
128 struct lustre_sb_info *lsi = s2lsi(sb);
129 struct obd_device *mgc = lsi->lsi_mgc;
136 /* mgc_process_config */
137 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
138 lustre_cfg_bufs_set_string(&bufs, 1, logname);
140 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
141 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
144 lustre_cfg_init(lcfg, LCFG_LOG_END, &bufs);
145 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
146 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
149 EXPORT_SYMBOL(lustre_end_log);
151 /**************** obd start *******************/
153 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
154 * lctl (and do for echo cli/srv.
156 static int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
157 char *s1, char *s2, char *s3, char *s4)
159 struct lustre_cfg_bufs bufs;
160 struct lustre_cfg *lcfg = NULL;
163 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
164 cmd, s1, s2, s3, s4);
166 lustre_cfg_bufs_reset(&bufs, cfgname);
168 lustre_cfg_bufs_set_string(&bufs, 1, s1);
170 lustre_cfg_bufs_set_string(&bufs, 2, s2);
172 lustre_cfg_bufs_set_string(&bufs, 3, s3);
174 lustre_cfg_bufs_set_string(&bufs, 4, s4);
176 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
179 lustre_cfg_init(lcfg, cmd, &bufs);
180 lcfg->lcfg_nid = nid;
181 rc = class_process_config(lcfg);
182 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
186 /** Call class_attach and class_setup. These methods in turn call
187 * obd type-specific methods.
189 int lustre_start_simple(char *obdname, char *type, char *uuid,
190 char *s1, char *s2, char *s3, char *s4)
193 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
195 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
197 CERROR("%s attach error %d\n", obdname, rc);
200 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
202 CERROR("%s setup error %d\n", obdname, rc);
203 do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
208 static DEFINE_MUTEX(mgc_start_lock);
210 /** Set up a mgc obd to process startup logs
212 * \param sb [in] super block of the mgc obd
214 * \retval 0 success, otherwise error code
216 int lustre_start_mgc(struct super_block *sb)
218 struct obd_connect_data *data = NULL;
219 struct lustre_sb_info *lsi = s2lsi(sb);
220 struct obd_device *obd;
221 struct obd_export *exp;
222 struct obd_uuid *uuid = NULL;
225 char nidstr[LNET_NIDSTR_SIZE];
226 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
228 int rc = 0, i = 0, j;
232 LASSERT(lsi->lsi_lmd);
234 /* Find the first non-lo MGS nid for our MGC name */
235 if (IS_SERVER(lsi)) {
236 /* mount -o mgsnode=nid */
237 ptr = lsi->lsi_lmd->lmd_mgs;
238 if (lsi->lsi_lmd->lmd_mgs &&
239 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
241 } else if (IS_MGS(lsi)) {
242 struct lnet_process_id id;
244 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
245 if (id.nid == LNET_NID_LO_0)
252 } else { /* client */
253 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
254 ptr = lsi->lsi_lmd->lmd_dev;
255 if (class_parse_nid(ptr, &nid, &ptr) == 0)
259 CERROR("No valid MGS nids found.\n");
263 mutex_lock(&mgc_start_lock);
265 libcfs_nid2str_r(nid, nidstr, sizeof(nidstr));
266 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(nidstr) + 1;
267 OBD_ALLOC(mgcname, len);
268 OBD_ALLOC(niduuid, len + 2);
269 if (mgcname == NULL || niduuid == NULL)
270 GOTO(out_free, rc = -ENOMEM);
271 snprintf(mgcname, len, "%s%s", LUSTRE_MGC_OBDNAME, nidstr);
273 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
277 GOTO(out_free, rc = -ENOMEM);
279 obd = class_name2obd(mgcname);
280 if (obd && !obd->obd_stopping) {
283 rc = obd_set_info_async(NULL, obd->obd_self_export,
284 strlen(KEY_MGSSEC), KEY_MGSSEC,
285 strlen(mgssec), mgssec, NULL);
289 /* Re-using an existing MGC */
290 atomic_inc(&obd->u.cli.cl_mgc_refcount);
292 /* IR compatibility check, only for clients */
293 if (lmd_is_client(lsi->lsi_lmd)) {
295 int vallen = sizeof(*data);
296 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
298 rc = obd_get_info(NULL, obd->obd_self_export,
299 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
302 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
303 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
304 /* LMD_FLG_NOIR is for test purpose only */
306 "Trying to mount a client with IR setting "
307 "not compatible with current mgc. "
308 "Force to use current mgc setting that is "
310 has_ir ? "enabled" : "disabled");
312 *flags &= ~LMD_FLG_NOIR;
314 *flags |= LMD_FLG_NOIR;
319 /* If we are restarting the MGS, don't try to keep the MGC's
320 old connection, or registration will fail. */
322 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
326 /* Try all connections, but only once (again).
327 We don't want to block another target from starting
328 (using its local copy of the log), but we do want to connect
329 if at all possible. */
331 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
332 rc = obd_set_info_async(NULL, obd->obd_self_export,
333 sizeof(KEY_INIT_RECOV_BACKUP),
334 KEY_INIT_RECOV_BACKUP,
335 sizeof(recov_bk), &recov_bk, NULL);
339 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
341 /* Add the primary nids for the MGS */
343 snprintf(niduuid, len + 2, "%s_%x", mgcname, i);
344 if (IS_SERVER(lsi)) {
345 ptr = lsi->lsi_lmd->lmd_mgs;
346 CDEBUG(D_MOUNT, "mgs nids %s.\n", ptr);
348 /* Use local nids (including LO) */
349 struct lnet_process_id id;
351 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
352 rc = do_lcfg(mgcname, id.nid, LCFG_ADD_UUID,
353 niduuid, NULL, NULL, NULL);
356 /* Use mgsnode= nids */
357 /* mount -o mgsnode=nid */
358 if (lsi->lsi_lmd->lmd_mgs) {
359 ptr = lsi->lsi_lmd->lmd_mgs;
360 } else if (class_find_param(ptr, PARAM_MGSNODE,
362 CERROR("No MGS nids given.\n");
363 GOTO(out_free, rc = -EINVAL);
366 * Add primary MGS nid(s).
367 * Multiple nids on one MGS node are separated
370 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
371 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
372 niduuid, NULL, NULL, NULL);
375 /* Stop at the first failover nid */
380 } else { /* client */
381 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
382 ptr = lsi->lsi_lmd->lmd_dev;
383 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
384 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
385 niduuid, NULL, NULL, NULL);
388 /* Stop at the first failover nid */
394 CERROR("No valid MGS nids found.\n");
395 GOTO(out_free, rc = -EINVAL);
397 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
399 /* Random uuid for MGC allows easier reconnects */
402 GOTO(out_free, rc = -ENOMEM);
404 ll_generate_random_uuid(uuidc);
405 class_uuid_unparse(uuidc, uuid);
408 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
409 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
410 niduuid, NULL, NULL);
414 /* Add any failover MGS nids */
416 while (ptr && ((*ptr == ':' ||
417 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
418 /* New failover node */
419 sprintf(niduuid, "%s_%x", mgcname, i);
421 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
422 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
423 niduuid, NULL, NULL, NULL);
430 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
431 niduuid, NULL, NULL, NULL);
439 lsi->lsi_lmd->lmd_mgs_failnodes = i;
441 obd = class_name2obd(mgcname);
443 CERROR("Can't find mgcobd %s\n", mgcname);
444 GOTO(out_free, rc = -ENOTCONN);
447 rc = obd_set_info_async(NULL, obd->obd_self_export,
448 strlen(KEY_MGSSEC), KEY_MGSSEC,
449 strlen(mgssec), mgssec, NULL);
453 /* Keep a refcount of servers/clients who started with "mount",
454 so we know when we can get rid of the mgc. */
455 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
457 /* We connect to the MGS at setup, and don't disconnect until cleanup */
458 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
459 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
460 OBD_CONNECT_LVB_TYPE |
461 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_BARRIER;
463 if (lmd_is_client(lsi->lsi_lmd) &&
464 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
465 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
466 data->ocd_version = LUSTRE_VERSION_CODE;
467 rc = obd_connect(NULL, &exp, obd, uuid, data, NULL);
469 CERROR("connect failed %d\n", rc);
473 obd->u.cli.cl_mgc_mgsexp = exp;
476 /* Keep the mgc info in the sb. Note that many lsi's can point
480 mutex_unlock(&mgc_start_lock);
487 OBD_FREE(mgcname, len);
489 OBD_FREE(niduuid, len + 2);
493 static int lustre_stop_mgc(struct super_block *sb)
495 struct lustre_sb_info *lsi = s2lsi(sb);
496 struct obd_device *obd;
497 char *niduuid = NULL, *ptr = NULL;
498 int i, rc = 0, len = 0;
508 mutex_lock(&mgc_start_lock);
509 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
510 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
511 /* This is not fatal, every client that stops
512 will call in here. */
513 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
514 atomic_read(&obd->u.cli.cl_mgc_refcount));
515 GOTO(out, rc = -EBUSY);
518 /* The MGC has no recoverable data in any case.
519 * force shotdown set in umount_begin */
520 obd->obd_no_recov = 1;
522 if (obd->u.cli.cl_mgc_mgsexp) {
523 /* An error is not fatal, if we are unable to send the
524 disconnect mgs ping evictor cleans up the export */
525 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
527 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
530 /* Save the obdname for cleaning the nid uuids, which are
532 len = strlen(obd->obd_name) + 6;
533 OBD_ALLOC(niduuid, len);
535 strcpy(niduuid, obd->obd_name);
536 ptr = niduuid + strlen(niduuid);
539 rc = class_manual_cleanup(obd);
543 /* Clean the nid uuids */
545 GOTO(out, rc = -ENOMEM);
547 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
548 sprintf(ptr, "_%x", i);
549 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
550 niduuid, NULL, NULL, NULL);
552 CERROR("del MDC UUID %s failed: rc = %d\n",
557 OBD_FREE(niduuid, len);
559 /* class_import_put will get rid of the additional connections */
560 mutex_unlock(&mgc_start_lock);
564 /***************** lustre superblock **************/
566 static struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
568 struct lustre_sb_info *lsi;
574 OBD_ALLOC_PTR(lsi->lsi_lmd);
580 lsi->lsi_lmd->lmd_exclude_count = 0;
581 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
582 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
583 s2lsi_nocast(sb) = lsi;
584 /* we take 1 extra ref for our setup */
585 atomic_set(&lsi->lsi_mounts, 1);
587 /* Default umount style */
588 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
589 INIT_LIST_HEAD(&lsi->lsi_lwp_list);
590 mutex_init(&lsi->lsi_lwp_mutex);
595 static int lustre_free_lsi(struct super_block *sb)
597 struct lustre_sb_info *lsi = s2lsi(sb);
600 LASSERT(lsi != NULL);
601 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
603 /* someone didn't call server_put_mount. */
604 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
606 if (lsi->lsi_lmd != NULL) {
607 if (lsi->lsi_lmd->lmd_dev != NULL)
608 OBD_FREE(lsi->lsi_lmd->lmd_dev,
609 strlen(lsi->lsi_lmd->lmd_dev) + 1);
610 if (lsi->lsi_lmd->lmd_profile != NULL)
611 OBD_FREE(lsi->lsi_lmd->lmd_profile,
612 strlen(lsi->lsi_lmd->lmd_profile) + 1);
613 if (lsi->lsi_lmd->lmd_fileset != NULL)
614 OBD_FREE(lsi->lsi_lmd->lmd_fileset,
615 strlen(lsi->lsi_lmd->lmd_fileset) + 1);
616 if (lsi->lsi_lmd->lmd_mgssec != NULL)
617 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
618 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
619 if (lsi->lsi_lmd->lmd_opts != NULL)
620 OBD_FREE(lsi->lsi_lmd->lmd_opts,
621 strlen(lsi->lsi_lmd->lmd_opts) + 1);
622 if (lsi->lsi_lmd->lmd_exclude_count)
623 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
624 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
625 lsi->lsi_lmd->lmd_exclude_count);
626 if (lsi->lsi_lmd->lmd_mgs != NULL)
627 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
628 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
629 if (lsi->lsi_lmd->lmd_osd_type != NULL)
630 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
631 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
632 if (lsi->lsi_lmd->lmd_params != NULL)
633 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
634 if (lsi->lsi_lmd->lmd_nidnet != NULL)
635 OBD_FREE(lsi->lsi_lmd->lmd_nidnet,
636 strlen(lsi->lsi_lmd->lmd_nidnet) + 1);
638 OBD_FREE_PTR(lsi->lsi_lmd);
641 LASSERT(lsi->lsi_llsbi == NULL);
643 s2lsi_nocast(sb) = NULL;
648 /* The lsi has one reference for every server that is using the disk -
649 e.g. MDT, MGS, and potentially MGC */
650 int lustre_put_lsi(struct super_block *sb)
652 struct lustre_sb_info *lsi = s2lsi(sb);
655 LASSERT(lsi != NULL);
657 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
658 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
659 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
660 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
661 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
662 lsi->lsi_dt_dev = NULL;
663 obd_disconnect(lsi->lsi_osd_exp);
664 /* wait till OSD is gone */
665 obd_zombie_barrier();
674 * The goal of this function is to extract the file system name
675 * from the obd name. This can come in two flavors. One is
676 * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
677 * number. In both cases we should return fsname. If it is
678 * not a valid obd name it is assumed to be the file system
681 void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
687 /* First we have to see if the @tgt has '-' at all. It is
688 * valid for the user to request something like
689 * lctl set_param -P llite.lustre*.xattr_cache=0
691 ptr = strrchr(tgt, '-');
693 /* No '-' means it could end in '*' */
694 ptr = strchr(tgt, '*');
696 /* No '*' either. Assume tgt = fsname */
704 /* tgt format fsname-MDT0000-* */
705 if ((!strncmp(ptr, "-MDT", 4) ||
706 !strncmp(ptr, "-OST", 4)) &&
707 (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
708 isxdigit(ptr[6]) && isxdigit(ptr[7]))) {
713 /* tgt_format fsname-cli'dev'-'uuid' except for the llite case
714 * which are named fsname-'uuid'. Examples:
716 * lustre-clilov-ffff88104db5b800
717 * lustre-ffff88104db5b800 (for llite device)
719 * The length of the obd uuid can vary on different platforms.
720 * This test if any invalid characters are in string. Allow
721 * wildcards with '*' character.
724 if (!strspn(ptr, "0123456789abcdefABCDEF*")) {
729 /* Now that we validated the device name lets extract the
730 * file system name. Most of the names in this class will
731 * have '-cli' in its name which needs to be dropped. If
732 * it doesn't have '-cli' then its a llite device which
733 * ptr already points to the start of the uuid string.
735 tmp = strstr(tgt, "-cli");
742 len = min_t(size_t, len, LUSTRE_MAXFSNAME);
743 snprintf(fsname, buflen, "%.*s", (int)len, tgt);
747 EXPORT_SYMBOL(obdname2fsname);
750 * <FSNAME><SEPARATOR><TYPE><INDEX>
751 * FSNAME is between 1 and 8 characters (inclusive).
752 * Excluded characters are '/' and ':'
753 * SEPARATOR is either ':' or '-'
754 * TYPE: "OST", "MDT", etc.
755 * INDEX: Hex representation of the index
758 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
759 * @param [in] svname server name including type and index
760 * @param [out] fsname Buffer to copy filesystem name prefix into.
761 * Must have at least 'strlen(fsname) + 1' chars.
762 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
765 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
769 dash = svname + strnlen(svname, LUSTRE_MAXFSNAME);
770 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
775 if (fsname != NULL) {
776 strncpy(fsname, svname, dash - svname);
777 fsname[dash - svname] = '\0';
785 EXPORT_SYMBOL(server_name2fsname);
788 * Get service name (svname) from string
790 * if endptr isn't NULL it is set to end of fsname *
792 int server_name2svname(const char *label, char *svname, const char **endptr,
798 /* We use server_name2fsname() just for parsing */
799 rc = server_name2fsname(label, NULL, &dash);
806 if (strlcpy(svname, dash + 1, svsize) >= svsize)
811 EXPORT_SYMBOL(server_name2svname);
814 * check server name is OST.
816 int server_name_is_ost(const char *svname)
821 /* We use server_name2fsname() just for parsing */
822 rc = server_name2fsname(svname, NULL, &dash);
828 if (strncmp(dash, "OST", 3) == 0)
832 EXPORT_SYMBOL(server_name_is_ost);
835 * Get the index from the target name MDTXXXX/OSTXXXX
836 * rc = server type, or rc < 0 on error
838 int target_name2index(const char *tgtname, __u32 *idx, const char **endptr)
840 const char *dash = tgtname;
844 if (strncmp(dash, "MDT", 3) == 0)
845 rc = LDD_F_SV_TYPE_MDT;
846 else if (strncmp(dash, "OST", 3) == 0)
847 rc = LDD_F_SV_TYPE_OST;
853 if (strncmp(dash, "all", 3) == 0) {
856 return rc | LDD_F_SV_ALL;
859 index = simple_strtoul(dash, (char **)endptr, 16);
864 EXPORT_SYMBOL(target_name2index);
866 /* Get the index from the obd name.
869 if endptr isn't NULL it is set to end of name */
870 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
875 /* We use server_name2fsname() just for parsing */
876 rc = server_name2fsname(svname, NULL, &dash);
881 rc = target_name2index(dash, idx, endptr);
885 /* Account for -mdc after index that is possible when specifying mdt */
886 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
887 sizeof(LUSTRE_MDC_NAME)-1) == 0)
888 *endptr += sizeof(LUSTRE_MDC_NAME);
892 EXPORT_SYMBOL(server_name2index);
894 /*************** mount common betweeen server and client ***************/
897 int lustre_common_put_super(struct super_block *sb)
902 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
904 /* Drop a ref to the MGC */
905 rc = lustre_stop_mgc(sb);
906 if (rc && (rc != -ENOENT)) {
908 CERROR("Can't stop MGC: %d\n", rc);
911 /* BUSY just means that there's some other obd that
912 needs the mgc. Let him clean it up. */
913 CDEBUG(D_MOUNT, "MGC still in use\n");
915 /* Drop a ref to the mounted disk */
920 EXPORT_SYMBOL(lustre_common_put_super);
922 static void lmd_print(struct lustre_mount_data *lmd)
926 PRINT_CMD(D_MOUNT, " mount data:\n");
927 if (lmd_is_client(lmd))
928 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
929 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
930 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
933 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
935 if (lmd->lmd_recovery_time_soft)
936 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
937 lmd->lmd_recovery_time_soft);
939 if (lmd->lmd_recovery_time_hard)
940 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
941 lmd->lmd_recovery_time_hard);
943 for (i = 0; i < lmd->lmd_exclude_count; i++) {
944 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
945 lmd->lmd_exclude[i]);
949 /* Is this server on the exclusion list */
950 int lustre_check_exclusion(struct super_block *sb, char *svname)
952 struct lustre_sb_info *lsi = s2lsi(sb);
953 struct lustre_mount_data *lmd = lsi->lsi_lmd;
958 rc = server_name2index(svname, &index, NULL);
959 if (rc != LDD_F_SV_TYPE_OST)
960 /* Only exclude OSTs */
963 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
964 index, lmd->lmd_exclude_count, lmd->lmd_dev);
966 for(i = 0; i < lmd->lmd_exclude_count; i++) {
967 if (index == lmd->lmd_exclude[i]) {
968 CWARN("Excluding %s (on exclusion list)\n", svname);
975 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
976 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
978 const char *s1 = ptr, *s2;
984 /* The shortest an ost name can be is 8 chars: -OST0000.
985 We don't actually know the fsname at this time, so in fact
986 a user could specify any fsname. */
987 devmax = strlen(ptr) / 8 + 1;
989 /* temp storage until we figure out how many we have */
990 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
994 /* we enter this fn pointing at the '=' */
995 while (*s1 && *s1 != ' ' && *s1 != ',') {
997 rc = server_name2index(s1, &index, &s2);
999 CERROR("Can't parse server name '%s': rc = %d\n",
1003 if (rc == LDD_F_SV_TYPE_OST)
1004 exclude_list[lmd->lmd_exclude_count++] = index;
1006 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
1007 (uint)(s2-s1), s1, rc);
1009 /* now we are pointing at ':' (next exclude)
1010 or ',' (end of excludes) */
1011 if (lmd->lmd_exclude_count >= devmax)
1014 if (rc >= 0) /* non-err */
1017 if (lmd->lmd_exclude_count) {
1018 /* permanent, freed in lustre_free_lsi */
1019 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1020 lmd->lmd_exclude_count);
1021 if (lmd->lmd_exclude) {
1022 memcpy(lmd->lmd_exclude, exclude_list,
1023 sizeof(index) * lmd->lmd_exclude_count);
1026 lmd->lmd_exclude_count = 0;
1029 OBD_FREE(exclude_list, sizeof(index) * devmax);
1033 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1038 if (lmd->lmd_mgssec != NULL) {
1039 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1040 lmd->lmd_mgssec = NULL;
1043 tail = strchr(ptr, ',');
1045 length = strlen(ptr);
1047 length = tail - ptr;
1049 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1050 if (lmd->lmd_mgssec == NULL)
1053 memcpy(lmd->lmd_mgssec, ptr, length);
1054 lmd->lmd_mgssec[length] = '\0';
1058 static int lmd_parse_network(struct lustre_mount_data *lmd, char *ptr)
1063 if (lmd->lmd_nidnet != NULL) {
1064 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1065 lmd->lmd_nidnet = NULL;
1068 tail = strchr(ptr, ',');
1070 length = strlen(ptr);
1072 length = tail - ptr;
1074 OBD_ALLOC(lmd->lmd_nidnet, length + 1);
1075 if (lmd->lmd_nidnet == NULL)
1078 memcpy(lmd->lmd_nidnet, ptr, length);
1079 lmd->lmd_nidnet[length] = '\0';
1083 static int lmd_parse_string(char **handle, char *ptr)
1088 if ((handle == NULL) || (ptr == NULL))
1091 if (*handle != NULL) {
1092 OBD_FREE(*handle, strlen(*handle) + 1);
1096 tail = strchr(ptr, ',');
1098 length = strlen(ptr);
1100 length = tail - ptr;
1102 OBD_ALLOC(*handle, length + 1);
1103 if (*handle == NULL)
1106 memcpy(*handle, ptr, length);
1107 (*handle)[length] = '\0';
1112 /* Collect multiple values for mgsnid specifiers */
1113 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
1121 /* Find end of nidlist */
1122 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
1123 length = tail - *ptr;
1125 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
1129 if (lmd->lmd_mgs != NULL)
1130 oldlen = strlen(lmd->lmd_mgs) + 1;
1132 OBD_ALLOC(mgsnid, oldlen + length + 1);
1136 if (lmd->lmd_mgs != NULL) {
1137 /* Multiple mgsnid= are taken to mean failover locations */
1138 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
1139 mgsnid[oldlen - 1] = ':';
1140 OBD_FREE(lmd->lmd_mgs, oldlen);
1142 memcpy(mgsnid + oldlen, *ptr, length);
1143 mgsnid[oldlen + length] = '\0';
1144 lmd->lmd_mgs = mgsnid;
1151 * Find the first delimiter (comma or colon) from the specified \a buf and
1152 * make \a *endh point to the string starting with the delimiter. The commas
1153 * in expression list [...] will be skipped.
1155 * @buf a delimiter-separated string
1156 * @endh a pointer to a pointer that will point to the string
1157 * starting with the delimiter
1159 * RETURNS true if delimiter is found, false if delimiter is not found
1161 static bool lmd_find_delimiter(char *buf, char **endh)
1170 if (*c == ',' || *c == ':')
1173 pos = strcspn(c, "[:,]");
1177 /* Not a valid mount string */
1179 CWARN("invalid mount string format\n");
1187 /* invalid mount string */
1189 CWARN("invalid mount string format\n");
1204 * Find the first valid string delimited by comma or colon from the specified
1205 * \a buf and parse it to see whether it's a valid nid list. If yes, \a *endh
1206 * will point to the next string starting with the delimiter.
1208 * \param[in] buf a delimiter-separated string
1209 * \param[in] endh a pointer to a pointer that will point to the string
1210 * starting with the delimiter
1212 * \retval 0 if the string is a valid nid list
1213 * \retval 1 if the string is not a valid nid list
1215 static int lmd_parse_nidlist(char *buf, char **endh)
1217 struct list_head nidlist;
1224 while (*buf == ',' || *buf == ':')
1226 if (*buf == ' ' || *buf == '/' || *buf == '\0')
1229 if (!lmd_find_delimiter(buf, &endp))
1230 endp = buf + strlen(buf);
1235 INIT_LIST_HEAD(&nidlist);
1236 if (cfs_parse_nidlist(buf, strlen(buf), &nidlist) <= 0)
1238 cfs_free_nidlist(&nidlist);
1248 /** Parse mount line options
1249 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1250 * dev is passed as device=uml1:/lustre by mount.lustre
1252 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1254 char *s1, *s2, *devname = NULL;
1255 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1261 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1262 "/sbin/mount.lustre is installed.\n");
1266 /* Options should be a string - try to detect old lmd data */
1267 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1268 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1269 "/sbin/mount.lustre. Please install "
1270 "version %s\n", LUSTRE_VERSION_STRING);
1273 lmd->lmd_magic = LMD_MAGIC;
1275 OBD_ALLOC(lmd->lmd_params, LMD_PARAMS_MAXLEN);
1276 if (lmd->lmd_params == NULL)
1278 lmd->lmd_params[0] = '\0';
1280 /* Set default flags here */
1285 int time_min = OBD_RECOVERY_TIME_MIN;
1288 /* Skip whitespace and extra commas */
1289 while (*s1 == ' ' || *s1 == ',')
1293 /* Client options are parsed in ll_options: eg. flock,
1296 /* Parse non-ldiskfs options here. Rather than modifying
1297 ldiskfs, we just zero these out here */
1298 if (strncmp(s1, "abort_recov", 11) == 0) {
1299 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1301 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1302 lmd->lmd_recovery_time_soft =
1303 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1306 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1307 lmd->lmd_recovery_time_hard =
1308 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1311 } else if (strncmp(s1, "noir", 4) == 0) {
1312 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1314 } else if (strncmp(s1, "nosvc", 5) == 0) {
1315 lmd->lmd_flags |= LMD_FLG_NOSVC;
1317 } else if (strncmp(s1, "nomgs", 5) == 0) {
1318 lmd->lmd_flags |= LMD_FLG_NOMGS;
1320 } else if (strncmp(s1, "noscrub", 7) == 0) {
1321 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1323 } else if (strncmp(s1, "skip_lfsck", 10) == 0) {
1324 lmd->lmd_flags |= LMD_FLG_SKIP_LFSCK;
1326 } else if (strncmp(s1, "rdonly_dev", 10) == 0) {
1327 lmd->lmd_flags |= LMD_FLG_DEV_RDONLY;
1329 } else if (strncmp(s1, PARAM_MGSNODE,
1330 sizeof(PARAM_MGSNODE) - 1) == 0) {
1331 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1332 /* Assume the next mount opt is the first
1333 invalid nid we get to. */
1334 rc = lmd_parse_mgs(lmd, &s2);
1339 } else if (strncmp(s1, "writeconf", 9) == 0) {
1340 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1342 } else if (strncmp(s1, "update", 6) == 0) {
1343 lmd->lmd_flags |= LMD_FLG_UPDATE;
1345 } else if (strncmp(s1, "virgin", 6) == 0) {
1346 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1348 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1349 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1351 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1352 rc = lmd_parse_mgssec(lmd, s1 + 7);
1356 /* ost exclusion list */
1357 } else if (strncmp(s1, "exclude=", 8) == 0) {
1358 rc = lmd_make_exclusion(lmd, s1 + 7);
1362 } else if (strncmp(s1, "mgs", 3) == 0) {
1364 lmd->lmd_flags |= LMD_FLG_MGS;
1366 } else if (strncmp(s1, "svname=", 7) == 0) {
1367 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1371 } else if (strncmp(s1, "param=", 6) == 0) {
1372 size_t length, params_length;
1375 if (lmd_find_delimiter(s1 + 6, &tail)) {
1376 char *param_str = tail + 1;
1377 int supplementary = 1;
1378 while (lmd_parse_nidlist(param_str,
1382 length = param_str - s1 - supplementary;
1384 length = strlen(s1);
1387 params_length = strlen(lmd->lmd_params);
1388 if (params_length + length + 1 >= LMD_PARAMS_MAXLEN)
1390 strncat(lmd->lmd_params, s1 + 6, length);
1391 lmd->lmd_params[params_length + length] = '\0';
1392 strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN);
1393 s3 = s1 + 6 + length;
1395 } else if (strncmp(s1, "osd=", 4) == 0) {
1396 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1401 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1402 end of the options. */
1403 else if (strncmp(s1, "device=", 7) == 0) {
1405 /* terminate options right before device. device
1406 must be the last one. */
1409 } else if (strncmp(s1, "network=", 8) == 0) {
1410 rc = lmd_parse_network(lmd, s1 + 8);
1414 /* check if LNet dynamic peer discovery is activated */
1415 if (LNetGetPeerDiscoveryStatus()) {
1416 CERROR("LNet Dynamic Peer Discovery is enabled "
1417 "on this node. 'network' mount option "
1418 "cannot be taken into account.\n");
1426 s2 = strchr(s3, ',');
1434 memmove(s1, s2, strlen(s2) + 1);
1440 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1441 "(need mount option 'device=...')\n");
1445 s1 = strstr(devname, ":/");
1448 lmd->lmd_flags |= LMD_FLG_CLIENT;
1449 /* Remove leading /s from fsname */
1450 while (*++s1 == '/')
1453 while (*s2 != '/' && *s2 != '\0')
1455 /* Freed in lustre_free_lsi */
1456 OBD_ALLOC(lmd->lmd_profile, s2 - s1 + 8);
1457 if (!lmd->lmd_profile)
1460 strncat(lmd->lmd_profile, s1, s2 - s1);
1461 strncat(lmd->lmd_profile, "-client", 7);
1464 s2 = s1 + strlen(s1) - 1;
1465 /* Remove padding /s from fileset */
1469 OBD_ALLOC(lmd->lmd_fileset, s2 - s1 + 2);
1470 if (lmd->lmd_fileset == NULL) {
1471 OBD_FREE(lmd->lmd_profile,
1472 strlen(lmd->lmd_profile) + 1);
1475 strncat(lmd->lmd_fileset, s1, s2 - s1 + 1);
1479 if (lmd->lmd_nidnet != NULL) {
1480 /* 'network=' mount option forbidden for server */
1481 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1482 lmd->lmd_nidnet = NULL;
1484 CERROR("%s: option 'network=' not allowed for Lustre "
1485 "servers: rc = %d\n", devname, rc);
1490 /* Freed in lustre_free_lsi */
1491 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1494 strncpy(lmd->lmd_dev, devname, strlen(devname)+1);
1496 /* Save mount options */
1497 s1 = options + strlen(options) - 1;
1498 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1500 while (*options && (*options == ',' || *options == ' '))
1502 if (*options != 0) {
1503 /* Freed in lustre_free_lsi */
1504 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1507 strncpy(lmd->lmd_opts, options, strlen(options)+1);
1511 lmd->lmd_magic = LMD_MAGIC;
1516 CERROR("Bad mount options %s\n", options);
1520 struct lustre_mount_data2 {
1522 struct vfsmount *lmd2_mnt;
1525 /** This is the entry point for the mount call into Lustre.
1526 * This is called when a server or client is mounted,
1527 * and this is where we start setting things up.
1528 * @param data Mount options (e.g. -o flock,abort_recov)
1530 static int lustre_fill_super(struct super_block *sb, void *data, int silent)
1532 struct lustre_mount_data *lmd;
1533 struct lustre_mount_data2 *lmd2 = data;
1534 struct lustre_sb_info *lsi;
1538 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1540 lsi = lustre_init_lsi(sb);
1546 * Disable lockdep during mount, because mount locking patterns are
1552 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
1554 obd_zombie_barrier();
1556 /* Figure out the lmd from the mount options */
1557 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
1559 GOTO(out, rc = -EINVAL);
1562 if (lmd_is_client(lmd)) {
1563 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1564 if (client_fill_super == NULL)
1565 request_module("lustre");
1566 if (client_fill_super == NULL) {
1567 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
1568 "client mount! Is the 'lustre' "
1569 "module loaded?\n");
1573 rc = lustre_start_mgc(sb);
1575 lustre_common_put_super(sb);
1578 /* Connect and start */
1579 /* (should always be ll_fill_super) */
1580 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
1581 /* c_f_s will call lustre_common_put_super on failure */
1584 #ifdef HAVE_SERVER_SUPPORT
1585 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1586 rc = server_fill_super(sb);
1587 /* s_f_s calls lustre_start_mgc after the mount because we need
1588 the MGS nids which are stored on disk. Plus, we may
1589 need to start the MGS first. */
1590 /* s_f_s will call server_put_super on failure */
1592 CERROR("This is client-side-only module, "
1593 "cannot handle server mount.\n");
1598 /* If error happens in fill_super() call, @lsi will be killed there.
1599 * This is why we do not put it here. */
1603 CERROR("Unable to mount %s (%d)\n",
1604 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1606 CDEBUG(D_SUPER, "Mount %s complete\n",
1614 /* We can't call ll_fill_super by name because it lives in a module that
1615 must be loaded after this one. */
1616 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
1617 struct vfsmount *mnt))
1619 client_fill_super = cfs;
1621 EXPORT_SYMBOL(lustre_register_client_fill_super);
1623 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1625 kill_super_cb = cfs;
1627 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1629 /***************** FS registration ******************/
1630 #ifdef HAVE_FSTYPE_MOUNT
1631 static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1632 const char *devname, void *data)
1634 struct lustre_mount_data2 lmd2 = {
1638 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
1641 static int lustre_get_sb(struct file_system_type *fs_type, int flags,
1642 const char *devname, void *data, struct vfsmount *mnt)
1644 struct lustre_mount_data2 lmd2 = {
1649 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
1653 static void lustre_kill_super(struct super_block *sb)
1655 struct lustre_sb_info *lsi = s2lsi(sb);
1657 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1658 (*kill_super_cb)(sb);
1660 kill_anon_super(sb);
1663 /** Register the "lustre" fs type
1665 static struct file_system_type lustre_fs_type = {
1666 .owner = THIS_MODULE,
1668 #ifdef HAVE_FSTYPE_MOUNT
1669 .mount = lustre_mount,
1671 .get_sb = lustre_get_sb,
1673 .kill_sb = lustre_kill_super,
1674 .fs_flags = FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE |
1675 #ifdef HAVE_SERVER_SUPPORT
1681 MODULE_ALIAS_FS("lustre");
1683 int lustre_register_fs(void)
1685 return register_filesystem(&lustre_fs_type);
1688 int lustre_unregister_fs(void)
1690 return unregister_filesystem(&lustre_fs_type);