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 (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
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 LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
464 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
467 if (lmd_is_client(lsi->lsi_lmd) &&
468 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
469 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
470 data->ocd_version = LUSTRE_VERSION_CODE;
471 rc = obd_connect(NULL, &exp, obd, uuid, data, NULL);
473 CERROR("connect failed %d\n", rc);
477 obd->u.cli.cl_mgc_mgsexp = exp;
480 /* Keep the mgc info in the sb. Note that many lsi's can point
484 mutex_unlock(&mgc_start_lock);
491 OBD_FREE(mgcname, len);
493 OBD_FREE(niduuid, len + 2);
497 static int lustre_stop_mgc(struct super_block *sb)
499 struct lustre_sb_info *lsi = s2lsi(sb);
500 struct obd_device *obd;
501 char *niduuid = NULL, *ptr = NULL;
502 int i, rc = 0, len = 0;
512 mutex_lock(&mgc_start_lock);
513 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
514 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
515 /* This is not fatal, every client that stops
516 will call in here. */
517 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
518 atomic_read(&obd->u.cli.cl_mgc_refcount));
519 GOTO(out, rc = -EBUSY);
522 /* The MGC has no recoverable data in any case.
523 * force shotdown set in umount_begin */
524 obd->obd_no_recov = 1;
526 if (obd->u.cli.cl_mgc_mgsexp) {
527 /* An error is not fatal, if we are unable to send the
528 disconnect mgs ping evictor cleans up the export */
529 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
531 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
534 /* Save the obdname for cleaning the nid uuids, which are
536 len = strlen(obd->obd_name) + 6;
537 OBD_ALLOC(niduuid, len);
539 strcpy(niduuid, obd->obd_name);
540 ptr = niduuid + strlen(niduuid);
543 rc = class_manual_cleanup(obd);
547 /* Clean the nid uuids */
549 GOTO(out, rc = -ENOMEM);
551 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
552 sprintf(ptr, "_%x", i);
553 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
554 niduuid, NULL, NULL, NULL);
556 CERROR("del MDC UUID %s failed: rc = %d\n",
561 OBD_FREE(niduuid, len);
563 /* class_import_put will get rid of the additional connections */
564 mutex_unlock(&mgc_start_lock);
568 /***************** lustre superblock **************/
570 static struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
572 struct lustre_sb_info *lsi;
578 OBD_ALLOC_PTR(lsi->lsi_lmd);
584 lsi->lsi_lmd->lmd_exclude_count = 0;
585 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
586 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
587 s2lsi_nocast(sb) = lsi;
588 /* we take 1 extra ref for our setup */
589 atomic_set(&lsi->lsi_mounts, 1);
591 /* Default umount style */
592 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
593 INIT_LIST_HEAD(&lsi->lsi_lwp_list);
594 spin_lock_init(&lsi->lsi_lwp_lock);
599 static int lustre_free_lsi(struct super_block *sb)
601 struct lustre_sb_info *lsi = s2lsi(sb);
604 LASSERT(lsi != NULL);
605 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
607 /* someone didn't call server_put_mount. */
608 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
610 if (lsi->lsi_lmd != NULL) {
611 if (lsi->lsi_lmd->lmd_dev != NULL)
612 OBD_FREE(lsi->lsi_lmd->lmd_dev,
613 strlen(lsi->lsi_lmd->lmd_dev) + 1);
614 if (lsi->lsi_lmd->lmd_profile != NULL)
615 OBD_FREE(lsi->lsi_lmd->lmd_profile,
616 strlen(lsi->lsi_lmd->lmd_profile) + 1);
617 if (lsi->lsi_lmd->lmd_fileset != NULL)
618 OBD_FREE(lsi->lsi_lmd->lmd_fileset,
619 strlen(lsi->lsi_lmd->lmd_fileset) + 1);
620 if (lsi->lsi_lmd->lmd_mgssec != NULL)
621 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
622 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
623 if (lsi->lsi_lmd->lmd_opts != NULL)
624 OBD_FREE(lsi->lsi_lmd->lmd_opts,
625 strlen(lsi->lsi_lmd->lmd_opts) + 1);
626 if (lsi->lsi_lmd->lmd_exclude_count)
627 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
628 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
629 lsi->lsi_lmd->lmd_exclude_count);
630 if (lsi->lsi_lmd->lmd_mgs != NULL)
631 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
632 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
633 if (lsi->lsi_lmd->lmd_osd_type != NULL)
634 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
635 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
636 if (lsi->lsi_lmd->lmd_params != NULL)
637 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
638 if (lsi->lsi_lmd->lmd_nidnet != NULL)
639 OBD_FREE(lsi->lsi_lmd->lmd_nidnet,
640 strlen(lsi->lsi_lmd->lmd_nidnet) + 1);
642 OBD_FREE_PTR(lsi->lsi_lmd);
645 LASSERT(lsi->lsi_llsbi == NULL);
647 s2lsi_nocast(sb) = NULL;
652 /* The lsi has one reference for every server that is using the disk -
653 e.g. MDT, MGS, and potentially MGC */
654 int lustre_put_lsi(struct super_block *sb)
656 struct lustre_sb_info *lsi = s2lsi(sb);
659 LASSERT(lsi != NULL);
661 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
662 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
663 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
664 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
665 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
666 lsi->lsi_dt_dev = NULL;
667 obd_disconnect(lsi->lsi_osd_exp);
668 /* wait till OSD is gone */
669 obd_zombie_barrier();
678 * The goal of this function is to extract the file system name
679 * from the obd name. This can come in two flavors. One is
680 * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
681 * number. In both cases we should return fsname. If it is
682 * not a valid obd name it is assumed to be the file system
685 void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
691 /* First we have to see if the @tgt has '-' at all. It is
692 * valid for the user to request something like
693 * lctl set_param -P llite.lustre*.xattr_cache=0
695 ptr = strrchr(tgt, '-');
697 /* No '-' means it could end in '*' */
698 ptr = strchr(tgt, '*');
700 /* No '*' either. Assume tgt = fsname */
708 /* tgt format fsname-MDT0000-* */
709 if ((!strncmp(ptr, "-MDT", 4) ||
710 !strncmp(ptr, "-OST", 4)) &&
711 (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
712 isxdigit(ptr[6]) && isxdigit(ptr[7]))) {
717 /* tgt_format fsname-cli'dev'-'uuid' except for the llite case
718 * which are named fsname-'uuid'. Examples:
720 * lustre-clilov-ffff88104db5b800
721 * lustre-ffff88104db5b800 (for llite device)
723 * The length of the obd uuid can vary on different platforms.
724 * This test if any invalid characters are in string. Allow
725 * wildcards with '*' character.
728 if (!strspn(ptr, "0123456789abcdefABCDEF*")) {
733 /* Now that we validated the device name lets extract the
734 * file system name. Most of the names in this class will
735 * have '-cli' in its name which needs to be dropped. If
736 * it doesn't have '-cli' then its a llite device which
737 * ptr already points to the start of the uuid string.
739 tmp = strstr(tgt, "-cli");
746 len = min_t(size_t, len, LUSTRE_MAXFSNAME);
747 snprintf(fsname, buflen, "%.*s", (int)len, tgt);
751 EXPORT_SYMBOL(obdname2fsname);
754 * <FSNAME><SEPARATOR><TYPE><INDEX>
755 * FSNAME is between 1 and 8 characters (inclusive).
756 * Excluded characters are '/' and ':'
757 * SEPARATOR is either ':' or '-'
758 * TYPE: "OST", "MDT", etc.
759 * INDEX: Hex representation of the index
762 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
763 * @param [in] svname server name including type and index
764 * @param [out] fsname Buffer to copy filesystem name prefix into.
765 * Must have at least 'strlen(fsname) + 1' chars.
766 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
769 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
773 dash = svname + strnlen(svname, LUSTRE_MAXFSNAME);
774 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
779 if (fsname != NULL) {
780 strncpy(fsname, svname, dash - svname);
781 fsname[dash - svname] = '\0';
789 EXPORT_SYMBOL(server_name2fsname);
792 * Get service name (svname) from string
794 * if endptr isn't NULL it is set to end of fsname *
796 int server_name2svname(const char *label, char *svname, const char **endptr,
802 /* We use server_name2fsname() just for parsing */
803 rc = server_name2fsname(label, NULL, &dash);
810 if (strlcpy(svname, dash + 1, svsize) >= svsize)
815 EXPORT_SYMBOL(server_name2svname);
818 * check server name is OST.
820 int server_name_is_ost(const char *svname)
825 /* We use server_name2fsname() just for parsing */
826 rc = server_name2fsname(svname, NULL, &dash);
832 if (strncmp(dash, "OST", 3) == 0)
836 EXPORT_SYMBOL(server_name_is_ost);
839 * Get the index from the target name MDTXXXX/OSTXXXX
840 * rc = server type, or rc < 0 on error
842 int target_name2index(const char *tgtname, __u32 *idx, const char **endptr)
844 const char *dash = tgtname;
848 if (strncmp(dash, "MDT", 3) == 0)
849 rc = LDD_F_SV_TYPE_MDT;
850 else if (strncmp(dash, "OST", 3) == 0)
851 rc = LDD_F_SV_TYPE_OST;
857 if (strncmp(dash, "all", 3) == 0) {
860 return rc | LDD_F_SV_ALL;
863 index = simple_strtoul(dash, (char **)endptr, 16);
868 EXPORT_SYMBOL(target_name2index);
870 /* Get the index from the obd name.
873 if endptr isn't NULL it is set to end of name */
874 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
879 /* We use server_name2fsname() just for parsing */
880 rc = server_name2fsname(svname, NULL, &dash);
885 rc = target_name2index(dash, idx, endptr);
889 /* Account for -mdc after index that is possible when specifying mdt */
890 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
891 sizeof(LUSTRE_MDC_NAME)-1) == 0)
892 *endptr += sizeof(LUSTRE_MDC_NAME);
896 EXPORT_SYMBOL(server_name2index);
898 /*************** mount common betweeen server and client ***************/
901 int lustre_common_put_super(struct super_block *sb)
906 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
908 /* Drop a ref to the MGC */
909 rc = lustre_stop_mgc(sb);
910 if (rc && (rc != -ENOENT)) {
912 CERROR("Can't stop MGC: %d\n", rc);
915 /* BUSY just means that there's some other obd that
916 needs the mgc. Let him clean it up. */
917 CDEBUG(D_MOUNT, "MGC still in use\n");
919 /* Drop a ref to the mounted disk */
924 EXPORT_SYMBOL(lustre_common_put_super);
926 static void lmd_print(struct lustre_mount_data *lmd)
930 PRINT_CMD(D_MOUNT, " mount data:\n");
931 if (lmd_is_client(lmd))
932 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
933 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
934 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
937 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
939 if (lmd->lmd_recovery_time_soft)
940 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
941 lmd->lmd_recovery_time_soft);
943 if (lmd->lmd_recovery_time_hard)
944 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
945 lmd->lmd_recovery_time_hard);
947 for (i = 0; i < lmd->lmd_exclude_count; i++) {
948 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
949 lmd->lmd_exclude[i]);
953 /* Is this server on the exclusion list */
954 int lustre_check_exclusion(struct super_block *sb, char *svname)
956 struct lustre_sb_info *lsi = s2lsi(sb);
957 struct lustre_mount_data *lmd = lsi->lsi_lmd;
962 rc = server_name2index(svname, &index, NULL);
963 if (rc != LDD_F_SV_TYPE_OST)
964 /* Only exclude OSTs */
967 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
968 index, lmd->lmd_exclude_count, lmd->lmd_dev);
970 for(i = 0; i < lmd->lmd_exclude_count; i++) {
971 if (index == lmd->lmd_exclude[i]) {
972 CWARN("Excluding %s (on exclusion list)\n", svname);
979 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
980 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
982 const char *s1 = ptr, *s2;
988 /* The shortest an ost name can be is 8 chars: -OST0000.
989 We don't actually know the fsname at this time, so in fact
990 a user could specify any fsname. */
991 devmax = strlen(ptr) / 8 + 1;
993 /* temp storage until we figure out how many we have */
994 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
998 /* we enter this fn pointing at the '=' */
999 while (*s1 && *s1 != ' ' && *s1 != ',') {
1001 rc = server_name2index(s1, &index, &s2);
1003 CERROR("Can't parse server name '%s': rc = %d\n",
1007 if (rc == LDD_F_SV_TYPE_OST)
1008 exclude_list[lmd->lmd_exclude_count++] = index;
1010 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
1011 (uint)(s2-s1), s1, rc);
1013 /* now we are pointing at ':' (next exclude)
1014 or ',' (end of excludes) */
1015 if (lmd->lmd_exclude_count >= devmax)
1018 if (rc >= 0) /* non-err */
1021 if (lmd->lmd_exclude_count) {
1022 /* permanent, freed in lustre_free_lsi */
1023 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1024 lmd->lmd_exclude_count);
1025 if (lmd->lmd_exclude) {
1026 memcpy(lmd->lmd_exclude, exclude_list,
1027 sizeof(index) * lmd->lmd_exclude_count);
1030 lmd->lmd_exclude_count = 0;
1033 OBD_FREE(exclude_list, sizeof(index) * devmax);
1037 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1042 if (lmd->lmd_mgssec != NULL) {
1043 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1044 lmd->lmd_mgssec = NULL;
1047 tail = strchr(ptr, ',');
1049 length = strlen(ptr);
1051 length = tail - ptr;
1053 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1054 if (lmd->lmd_mgssec == NULL)
1057 memcpy(lmd->lmd_mgssec, ptr, length);
1058 lmd->lmd_mgssec[length] = '\0';
1062 static int lmd_parse_network(struct lustre_mount_data *lmd, char *ptr)
1067 if (lmd->lmd_nidnet != NULL) {
1068 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1069 lmd->lmd_nidnet = NULL;
1072 tail = strchr(ptr, ',');
1074 length = strlen(ptr);
1076 length = tail - ptr;
1078 OBD_ALLOC(lmd->lmd_nidnet, length + 1);
1079 if (lmd->lmd_nidnet == NULL)
1082 memcpy(lmd->lmd_nidnet, ptr, length);
1083 lmd->lmd_nidnet[length] = '\0';
1087 static int lmd_parse_string(char **handle, char *ptr)
1092 if ((handle == NULL) || (ptr == NULL))
1095 if (*handle != NULL) {
1096 OBD_FREE(*handle, strlen(*handle) + 1);
1100 tail = strchr(ptr, ',');
1102 length = strlen(ptr);
1104 length = tail - ptr;
1106 OBD_ALLOC(*handle, length + 1);
1107 if (*handle == NULL)
1110 memcpy(*handle, ptr, length);
1111 (*handle)[length] = '\0';
1116 /* Collect multiple values for mgsnid specifiers */
1117 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
1125 /* Find end of nidlist */
1126 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
1127 length = tail - *ptr;
1129 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
1133 if (lmd->lmd_mgs != NULL)
1134 oldlen = strlen(lmd->lmd_mgs) + 1;
1136 OBD_ALLOC(mgsnid, oldlen + length + 1);
1140 if (lmd->lmd_mgs != NULL) {
1141 /* Multiple mgsnid= are taken to mean failover locations */
1142 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
1143 mgsnid[oldlen - 1] = ':';
1144 OBD_FREE(lmd->lmd_mgs, oldlen);
1146 memcpy(mgsnid + oldlen, *ptr, length);
1147 mgsnid[oldlen + length] = '\0';
1148 lmd->lmd_mgs = mgsnid;
1155 * Find the first delimiter (comma or colon) from the specified \a buf and
1156 * make \a *endh point to the string starting with the delimiter. The commas
1157 * in expression list [...] will be skipped.
1159 * @buf a delimiter-separated string
1160 * @endh a pointer to a pointer that will point to the string
1161 * starting with the delimiter
1163 * RETURNS true if delimiter is found, false if delimiter is not found
1165 static bool lmd_find_delimiter(char *buf, char **endh)
1174 if (*c == ',' || *c == ':')
1177 pos = strcspn(c, "[:,]");
1181 /* Not a valid mount string */
1183 CWARN("invalid mount string format\n");
1191 /* invalid mount string */
1193 CWARN("invalid mount string format\n");
1208 * Find the first valid string delimited by comma or colon from the specified
1209 * \a buf and parse it to see whether it's a valid nid list. If yes, \a *endh
1210 * will point to the next string starting with the delimiter.
1212 * \param[in] buf a delimiter-separated string
1213 * \param[in] endh a pointer to a pointer that will point to the string
1214 * starting with the delimiter
1216 * \retval 0 if the string is a valid nid list
1217 * \retval 1 if the string is not a valid nid list
1219 static int lmd_parse_nidlist(char *buf, char **endh)
1221 struct list_head nidlist;
1228 while (*buf == ',' || *buf == ':')
1230 if (*buf == ' ' || *buf == '/' || *buf == '\0')
1233 if (!lmd_find_delimiter(buf, &endp))
1234 endp = buf + strlen(buf);
1239 INIT_LIST_HEAD(&nidlist);
1240 if (cfs_parse_nidlist(buf, strlen(buf), &nidlist) <= 0)
1242 cfs_free_nidlist(&nidlist);
1252 /** Parse mount line options
1253 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1254 * dev is passed as device=uml1:/lustre by mount.lustre
1256 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1258 char *s1, *s2, *devname = NULL;
1259 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1265 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1266 "/sbin/mount.lustre is installed.\n");
1270 /* Options should be a string - try to detect old lmd data */
1271 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1272 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1273 "/sbin/mount.lustre. Please install "
1274 "version %s\n", LUSTRE_VERSION_STRING);
1277 lmd->lmd_magic = LMD_MAGIC;
1279 OBD_ALLOC(lmd->lmd_params, LMD_PARAMS_MAXLEN);
1280 if (lmd->lmd_params == NULL)
1282 lmd->lmd_params[0] = '\0';
1284 /* Set default flags here */
1289 int time_min = OBD_RECOVERY_TIME_MIN;
1292 /* Skip whitespace and extra commas */
1293 while (*s1 == ' ' || *s1 == ',')
1297 /* Client options are parsed in ll_options: eg. flock,
1300 /* Parse non-ldiskfs options here. Rather than modifying
1301 ldiskfs, we just zero these out here */
1302 if (strncmp(s1, "abort_recov", 11) == 0) {
1303 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1305 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1306 lmd->lmd_recovery_time_soft =
1307 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1310 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1311 lmd->lmd_recovery_time_hard =
1312 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1315 } else if (strncmp(s1, "noir", 4) == 0) {
1316 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1318 } else if (strncmp(s1, "nosvc", 5) == 0) {
1319 lmd->lmd_flags |= LMD_FLG_NOSVC;
1321 } else if (strncmp(s1, "nomgs", 5) == 0) {
1322 lmd->lmd_flags |= LMD_FLG_NOMGS;
1324 } else if (strncmp(s1, "noscrub", 7) == 0) {
1325 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1327 } else if (strncmp(s1, "skip_lfsck", 10) == 0) {
1328 lmd->lmd_flags |= LMD_FLG_SKIP_LFSCK;
1330 } else if (strncmp(s1, "rdonly_dev", 10) == 0) {
1331 lmd->lmd_flags |= LMD_FLG_DEV_RDONLY;
1333 } else if (strncmp(s1, PARAM_MGSNODE,
1334 sizeof(PARAM_MGSNODE) - 1) == 0) {
1335 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1336 /* Assume the next mount opt is the first
1337 invalid nid we get to. */
1338 rc = lmd_parse_mgs(lmd, &s2);
1343 } else if (strncmp(s1, "writeconf", 9) == 0) {
1344 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1346 } else if (strncmp(s1, "update", 6) == 0) {
1347 lmd->lmd_flags |= LMD_FLG_UPDATE;
1349 } else if (strncmp(s1, "virgin", 6) == 0) {
1350 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1352 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1353 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1355 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1356 rc = lmd_parse_mgssec(lmd, s1 + 7);
1360 /* ost exclusion list */
1361 } else if (strncmp(s1, "exclude=", 8) == 0) {
1362 rc = lmd_make_exclusion(lmd, s1 + 7);
1366 } else if (strncmp(s1, "mgs", 3) == 0) {
1368 lmd->lmd_flags |= LMD_FLG_MGS;
1370 } else if (strncmp(s1, "svname=", 7) == 0) {
1371 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1375 } else if (strncmp(s1, "param=", 6) == 0) {
1376 size_t length, params_length;
1379 if (lmd_find_delimiter(s1 + 6, &tail)) {
1380 char *param_str = tail + 1;
1381 int supplementary = 1;
1382 while (lmd_parse_nidlist(param_str,
1386 length = param_str - s1 - supplementary;
1388 length = strlen(s1);
1391 params_length = strlen(lmd->lmd_params);
1392 if (params_length + length + 1 >= LMD_PARAMS_MAXLEN)
1394 strncat(lmd->lmd_params, s1 + 6, length);
1395 lmd->lmd_params[params_length + length] = '\0';
1396 strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN);
1397 s3 = s1 + 6 + length;
1399 } else if (strncmp(s1, "osd=", 4) == 0) {
1400 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1405 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1406 end of the options. */
1407 else if (strncmp(s1, "device=", 7) == 0) {
1409 /* terminate options right before device. device
1410 must be the last one. */
1413 } else if (strncmp(s1, "network=", 8) == 0) {
1414 rc = lmd_parse_network(lmd, s1 + 8);
1418 /* check if LNet dynamic peer discovery is activated */
1419 if (LNetGetPeerDiscoveryStatus()) {
1420 CERROR("LNet Dynamic Peer Discovery is enabled "
1421 "on this node. 'network' mount option "
1422 "cannot be taken into account.\n");
1430 s2 = strchr(s3, ',');
1438 memmove(s1, s2, strlen(s2) + 1);
1444 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1445 "(need mount option 'device=...')\n");
1449 s1 = strstr(devname, ":/");
1452 lmd->lmd_flags |= LMD_FLG_CLIENT;
1453 /* Remove leading /s from fsname */
1454 while (*++s1 == '/')
1457 while (*s2 != '/' && *s2 != '\0')
1459 /* Freed in lustre_free_lsi */
1460 OBD_ALLOC(lmd->lmd_profile, s2 - s1 + 8);
1461 if (!lmd->lmd_profile)
1464 strncat(lmd->lmd_profile, s1, s2 - s1);
1465 strncat(lmd->lmd_profile, "-client", 7);
1468 s2 = s1 + strlen(s1) - 1;
1469 /* Remove padding /s from fileset */
1473 OBD_ALLOC(lmd->lmd_fileset, s2 - s1 + 2);
1474 if (lmd->lmd_fileset == NULL) {
1475 OBD_FREE(lmd->lmd_profile,
1476 strlen(lmd->lmd_profile) + 1);
1479 strncat(lmd->lmd_fileset, s1, s2 - s1 + 1);
1483 if (lmd->lmd_nidnet != NULL) {
1484 /* 'network=' mount option forbidden for server */
1485 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1486 lmd->lmd_nidnet = NULL;
1488 CERROR("%s: option 'network=' not allowed for Lustre "
1489 "servers: rc = %d\n", devname, rc);
1494 /* Freed in lustre_free_lsi */
1495 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1498 strncpy(lmd->lmd_dev, devname, strlen(devname)+1);
1500 /* Save mount options */
1501 s1 = options + strlen(options) - 1;
1502 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1504 while (*options && (*options == ',' || *options == ' '))
1506 if (*options != 0) {
1507 /* Freed in lustre_free_lsi */
1508 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1511 strncpy(lmd->lmd_opts, options, strlen(options)+1);
1515 lmd->lmd_magic = LMD_MAGIC;
1520 CERROR("Bad mount options %s\n", options);
1524 struct lustre_mount_data2 {
1526 struct vfsmount *lmd2_mnt;
1529 /** This is the entry point for the mount call into Lustre.
1530 * This is called when a server or client is mounted,
1531 * and this is where we start setting things up.
1532 * @param data Mount options (e.g. -o flock,abort_recov)
1534 static int lustre_fill_super(struct super_block *sb, void *data, int silent)
1536 struct lustre_mount_data *lmd;
1537 struct lustre_mount_data2 *lmd2 = data;
1538 struct lustre_sb_info *lsi;
1542 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1544 lsi = lustre_init_lsi(sb);
1550 * Disable lockdep during mount, because mount locking patterns are
1556 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
1558 obd_zombie_barrier();
1560 /* Figure out the lmd from the mount options */
1561 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
1563 GOTO(out, rc = -EINVAL);
1566 if (lmd_is_client(lmd)) {
1567 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1568 if (client_fill_super == NULL)
1569 request_module("lustre");
1570 if (client_fill_super == NULL) {
1571 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
1572 "client mount! Is the 'lustre' "
1573 "module loaded?\n");
1577 rc = lustre_start_mgc(sb);
1579 lustre_common_put_super(sb);
1582 /* Connect and start */
1583 /* (should always be ll_fill_super) */
1584 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
1585 /* c_f_s will call lustre_common_put_super on failure */
1588 #ifdef HAVE_SERVER_SUPPORT
1589 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1590 rc = server_fill_super(sb);
1591 /* s_f_s calls lustre_start_mgc after the mount because we need
1592 the MGS nids which are stored on disk. Plus, we may
1593 need to start the MGS first. */
1594 /* s_f_s will call server_put_super on failure */
1596 CERROR("This is client-side-only module, "
1597 "cannot handle server mount.\n");
1602 /* If error happens in fill_super() call, @lsi will be killed there.
1603 * This is why we do not put it here. */
1607 CERROR("Unable to mount %s (%d)\n",
1608 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1610 CDEBUG(D_SUPER, "Mount %s complete\n",
1618 /* We can't call ll_fill_super by name because it lives in a module that
1619 must be loaded after this one. */
1620 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
1621 struct vfsmount *mnt))
1623 client_fill_super = cfs;
1625 EXPORT_SYMBOL(lustre_register_client_fill_super);
1627 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1629 kill_super_cb = cfs;
1631 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1633 /***************** FS registration ******************/
1634 #ifdef HAVE_FSTYPE_MOUNT
1635 static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1636 const char *devname, void *data)
1638 struct lustre_mount_data2 lmd2 = {
1642 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
1645 static int lustre_get_sb(struct file_system_type *fs_type, int flags,
1646 const char *devname, void *data, struct vfsmount *mnt)
1648 struct lustre_mount_data2 lmd2 = {
1653 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
1657 static void lustre_kill_super(struct super_block *sb)
1659 struct lustre_sb_info *lsi = s2lsi(sb);
1661 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1662 (*kill_super_cb)(sb);
1664 kill_anon_super(sb);
1667 /** Register the "lustre" fs type
1669 static struct file_system_type lustre_fs_type = {
1670 .owner = THIS_MODULE,
1672 #ifdef HAVE_FSTYPE_MOUNT
1673 .mount = lustre_mount,
1675 .get_sb = lustre_get_sb,
1677 .kill_sb = lustre_kill_super,
1678 .fs_flags = FS_REQUIRES_DEV | FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
1680 MODULE_ALIAS_FS("lustre");
1682 int lustre_register_fs(void)
1684 return register_filesystem(&lustre_fs_type);
1687 int lustre_unregister_fs(void)
1689 return unregister_filesystem(&lustre_fs_type);