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/random.h>
47 #include <libcfs/linux/linux-uuid.h>
48 #include <linux/version.h>
49 #include <lustre_log.h>
50 #include <lustre_disk.h>
51 #include <uapi/linux/lustre/lustre_param.h>
53 static int (*client_fill_super)(struct super_block *sb);
55 static void (*kill_super_cb)(struct super_block *sb);
57 /**************** config llog ********************/
60 * Get a config log from the MGS and process it.
61 * This func is called for both clients and servers.
62 * Continue to process new statements appended to the logs
63 * (whenever the config lock is revoked) until lustre_end_log
66 * @param sb The superblock is used by the MGC to write to the local copy of
68 * @param logname The name of the llog to replicate from the MGS
69 * @param cfg Since the same MGC may be used to follow multiple config logs
70 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
71 * this log, and is added to the mgc's list of logs to follow.
73 int lustre_process_log(struct super_block *sb, char *logname,
74 struct config_llog_instance *cfg)
76 struct lustre_cfg *lcfg;
77 struct lustre_cfg_bufs *bufs;
78 struct lustre_sb_info *lsi = s2lsi(sb);
79 struct obd_device *mgc = lsi->lsi_mgc;
91 /* mgc_process_config */
92 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
93 lustre_cfg_bufs_set_string(bufs, 1, logname);
94 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
95 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
96 OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
98 GOTO(out, rc = -ENOMEM);
99 lustre_cfg_init(lcfg, LCFG_LOG_START, bufs);
101 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
102 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
107 LCONSOLE_ERROR_MSG(0x15b,
108 "%s: Configuration from log %s failed from MGS %d. Check client and MGS are on compatible version.\n",
109 mgc->obd_name, logname, rc);
111 LCONSOLE_ERROR_MSG(0x15c,
112 "%s: Confguration from log %s failed from MGS %d. Communication error between node & MGS, a bad configuration, or other errors. See syslog for more info\n",
113 mgc->obd_name, logname, rc);
115 /* class_obd_list(); */
118 EXPORT_SYMBOL(lustre_process_log);
120 /* Stop watching this config log for updates */
121 int lustre_end_log(struct super_block *sb, char *logname,
122 struct config_llog_instance *cfg)
124 struct lustre_cfg *lcfg;
125 struct lustre_cfg_bufs bufs;
126 struct lustre_sb_info *lsi = s2lsi(sb);
127 struct obd_device *mgc = lsi->lsi_mgc;
135 /* mgc_process_config */
136 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
137 lustre_cfg_bufs_set_string(&bufs, 1, logname);
139 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
140 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
143 lustre_cfg_init(lcfg, LCFG_LOG_END, &bufs);
144 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
145 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
148 EXPORT_SYMBOL(lustre_end_log);
150 /**************** 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));
187 * Call class_attach and class_setup. These methods in turn call
188 * OBD type-specific methods.
190 int lustre_start_simple(char *obdname, char *type, char *uuid,
191 char *s1, char *s2, char *s3, char *s4)
195 CDEBUG(D_MOUNT, "Starting OBD %s (typ=%s)\n", obdname, type);
197 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
199 CERROR("%s attach error %d\n", obdname, rc);
202 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
204 CERROR("%s setup error %d\n", obdname, rc);
205 do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
210 static DEFINE_MUTEX(mgc_start_lock);
213 * Set up a MGC OBD to process startup logs
215 * \param sb [in] super block of the MGC OBD
217 * \retval 0 success, otherwise error code
219 int lustre_start_mgc(struct super_block *sb)
221 struct obd_connect_data *data = NULL;
222 struct lustre_sb_info *lsi = s2lsi(sb);
223 struct obd_device *obd;
224 struct obd_export *exp;
225 struct obd_uuid *uuid = NULL;
228 char nidstr[LNET_NIDSTR_SIZE];
229 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
231 int rc = 0, i = 0, j;
236 LASSERT(lsi->lsi_lmd);
238 /* Find the first non-lo MGS NID for our MGC name */
239 if (IS_SERVER(lsi)) {
240 /* mount -o mgsnode=nid */
241 ptr = lsi->lsi_lmd->lmd_mgs;
242 if (lsi->lsi_lmd->lmd_mgs &&
243 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
245 } else if (IS_MGS(lsi)) {
246 struct lnet_process_id id;
248 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
249 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
256 } else { /* client */
257 /* Use NIDs from mount line: uml1,1@elan:uml2,2@elan:/lustre */
258 ptr = lsi->lsi_lmd->lmd_dev;
259 if (class_parse_nid(ptr, &nid, &ptr) == 0)
263 CERROR("No valid MGS NIDs found.\n");
267 mutex_lock(&mgc_start_lock);
269 libcfs_nid2str_r(nid, nidstr, sizeof(nidstr));
270 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(nidstr) + 1;
271 OBD_ALLOC(mgcname, len);
272 OBD_ALLOC(niduuid, len + 2);
273 if (mgcname == NULL || niduuid == NULL)
274 GOTO(out_free, rc = -ENOMEM);
275 snprintf(mgcname, len, "%s%s", LUSTRE_MGC_OBDNAME, nidstr);
277 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
281 GOTO(out_free, rc = -ENOMEM);
283 obd = class_name2obd(mgcname);
284 if (obd && !obd->obd_stopping) {
287 rc = obd_set_info_async(NULL, obd->obd_self_export,
288 strlen(KEY_MGSSEC), KEY_MGSSEC,
289 strlen(mgssec), mgssec, NULL);
293 /* Re-using an existing MGC */
294 atomic_inc(&obd->u.cli.cl_mgc_refcount);
296 /* IR compatibility check, only for clients */
297 if (lmd_is_client(lsi->lsi_lmd)) {
299 int vallen = sizeof(*data);
300 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
302 rc = obd_get_info(NULL, obd->obd_self_export,
303 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
306 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
307 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
308 /* LMD_FLG_NOIR is for test purpose only */
310 "Mounting client with IR setting not compatible with current MGC. Using MGC setting that is IR %s",
311 has_ir ? "enabled" : "disabled");
313 *flags &= ~LMD_FLG_NOIR;
315 *flags |= LMD_FLG_NOIR;
321 * If we are restarting the MGS, don't try to keep the MGC's
322 * old connection, or registration will fail.
325 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
330 * Try all connections, but only once (again).
331 * We don't want to block another target from starting
332 * (using its local copy of the log), but we do want to connect
333 * if at all possible.
336 CDEBUG(D_MOUNT, "%s:Set MGC reconnect %d\n", mgcname, recov_bk);
337 rc = obd_set_info_async(NULL, obd->obd_self_export,
338 sizeof(KEY_INIT_RECOV_BACKUP),
339 KEY_INIT_RECOV_BACKUP,
340 sizeof(recov_bk), &recov_bk, NULL);
344 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
346 /* Add the primary NIDs for the MGS */
348 snprintf(niduuid, len + 2, "%s_%x", mgcname, i);
349 if (IS_SERVER(lsi)) {
350 ptr = lsi->lsi_lmd->lmd_mgs;
351 CDEBUG(D_MOUNT, "mgs NIDs %s.\n", ptr);
353 /* Use local NIDs (including LO) */
354 struct lnet_process_id id;
356 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
357 rc = do_lcfg(mgcname, id.nid, LCFG_ADD_UUID,
358 niduuid, NULL, NULL, NULL);
361 /* Use mgsnode= nids */
362 /* mount -o mgsnode=nid */
363 if (lsi->lsi_lmd->lmd_mgs) {
364 ptr = lsi->lsi_lmd->lmd_mgs;
365 } else if (class_find_param(ptr, PARAM_MGSNODE,
367 CERROR("No MGS NIDs given.\n");
368 GOTO(out_free, rc = -EINVAL);
371 * Add primary MGS NID(s).
372 * Multiple NIDs on one MGS node are separated
375 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
376 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
377 niduuid, NULL, NULL, NULL);
380 /* Stop at the first failover NID */
385 } else { /* client */
386 /* Use NIDs from mount line: uml1,1@elan:uml2,2@elan:/lustre */
387 ptr = lsi->lsi_lmd->lmd_dev;
388 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
389 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
390 niduuid, NULL, NULL, NULL);
393 /* Stop at the first failover NID */
399 CERROR("No valid MGS NIDs found.\n");
400 GOTO(out_free, rc = -EINVAL);
402 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
404 /* Random uuid for MGC allows easier reconnects */
407 GOTO(out_free, rc = -ENOMEM);
409 generate_random_uuid(uuidc.b);
410 snprintf(uuid->uuid, UUID_SIZE, "%pU", uuidc.b);
413 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
414 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
415 niduuid, NULL, NULL);
419 /* Add any failover MGS NIDs */
421 while (ptr && ((*ptr == ':' ||
422 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
423 /* New failover node */
424 sprintf(niduuid, "%s_%x", mgcname, i);
426 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
427 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
428 niduuid, NULL, NULL, NULL);
435 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
436 niduuid, NULL, NULL, NULL);
444 lsi->lsi_lmd->lmd_mgs_failnodes = i;
446 obd = class_name2obd(mgcname);
448 CERROR("Can't find mgcobd %s\n", mgcname);
449 GOTO(out_free, rc = -ENOTCONN);
452 rc = obd_set_info_async(NULL, obd->obd_self_export,
453 strlen(KEY_MGSSEC), KEY_MGSSEC,
454 strlen(mgssec), mgssec, NULL);
459 * Keep a refcount of servers/clients who started with "mount",
460 * so we know when we can get rid of the mgc.
462 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
464 /* We connect to the MGS at setup, and don't disconnect until cleanup */
465 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
466 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
467 OBD_CONNECT_LVB_TYPE |
468 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_BARRIER;
470 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
471 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
474 if (lmd_is_client(lsi->lsi_lmd) &&
475 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
476 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
477 data->ocd_version = LUSTRE_VERSION_CODE;
478 rc = obd_connect(NULL, &exp, obd, uuid, data, NULL);
480 CERROR("connect failed %d\n", rc);
484 obd->u.cli.cl_mgc_mgsexp = exp;
488 * Keep the MGC info in the sb. Note that many lsi's can point
493 mutex_unlock(&mgc_start_lock);
500 OBD_FREE(mgcname, len);
502 OBD_FREE(niduuid, len + 2);
506 static int lustre_stop_mgc(struct super_block *sb)
508 struct lustre_sb_info *lsi = s2lsi(sb);
509 struct obd_device *obd;
510 char *niduuid = NULL, *ptr = NULL;
511 int i, rc = 0, len = 0;
522 mutex_lock(&mgc_start_lock);
523 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
524 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
526 * This is not fatal, every client that stops
529 CDEBUG(D_MOUNT, "MGC still has %d references.\n",
530 atomic_read(&obd->u.cli.cl_mgc_refcount));
531 GOTO(out, rc = -EBUSY);
535 * The MGC has no recoverable data in any case.
536 * force shotdown set in umount_begin
538 obd->obd_no_recov = 1;
540 if (obd->u.cli.cl_mgc_mgsexp) {
542 * An error is not fatal, if we are unable to send the
543 * disconnect mgs ping evictor cleans up the export
545 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
547 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
551 * Save the obdname for cleaning the nid uuids, which are
554 len = strlen(obd->obd_name) + 6;
555 OBD_ALLOC(niduuid, len);
557 strcpy(niduuid, obd->obd_name);
558 ptr = niduuid + strlen(niduuid);
561 rc = class_manual_cleanup(obd);
565 /* Clean the nid uuids */
567 GOTO(out, rc = -ENOMEM);
569 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
570 sprintf(ptr, "_%x", i);
571 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
572 niduuid, NULL, NULL, NULL);
574 CERROR("del MDC UUID %s failed: rc = %d\n",
579 OBD_FREE(niduuid, len);
581 /* class_import_put will get rid of the additional connections */
582 mutex_unlock(&mgc_start_lock);
586 /***************** lustre superblock **************/
588 static struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
590 struct lustre_sb_info *lsi;
597 OBD_ALLOC_PTR(lsi->lsi_lmd);
603 lsi->lsi_lmd->lmd_exclude_count = 0;
604 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
605 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
606 s2lsi_nocast(sb) = lsi;
607 /* we take 1 extra ref for our setup */
608 atomic_set(&lsi->lsi_mounts, 1);
610 /* Default umount style */
611 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
612 INIT_LIST_HEAD(&lsi->lsi_lwp_list);
613 mutex_init(&lsi->lsi_lwp_mutex);
618 static int lustre_free_lsi(struct super_block *sb)
620 struct lustre_sb_info *lsi = s2lsi(sb);
624 LASSERT(lsi != NULL);
625 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
627 /* someone didn't call server_put_mount. */
628 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
630 if (lsi->lsi_lmd != NULL) {
631 if (lsi->lsi_lmd->lmd_dev != NULL)
632 OBD_FREE(lsi->lsi_lmd->lmd_dev,
633 strlen(lsi->lsi_lmd->lmd_dev) + 1);
634 if (lsi->lsi_lmd->lmd_profile != NULL)
635 OBD_FREE(lsi->lsi_lmd->lmd_profile,
636 strlen(lsi->lsi_lmd->lmd_profile) + 1);
637 if (lsi->lsi_lmd->lmd_fileset != NULL)
638 OBD_FREE(lsi->lsi_lmd->lmd_fileset,
639 strlen(lsi->lsi_lmd->lmd_fileset) + 1);
640 if (lsi->lsi_lmd->lmd_mgssec != NULL)
641 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
642 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
643 if (lsi->lsi_lmd->lmd_opts != NULL)
644 OBD_FREE(lsi->lsi_lmd->lmd_opts,
645 strlen(lsi->lsi_lmd->lmd_opts) + 1);
646 if (lsi->lsi_lmd->lmd_exclude_count)
647 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
648 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
649 lsi->lsi_lmd->lmd_exclude_count);
650 if (lsi->lsi_lmd->lmd_mgs != NULL)
651 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
652 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
653 if (lsi->lsi_lmd->lmd_osd_type != NULL)
654 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
655 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
656 if (lsi->lsi_lmd->lmd_params != NULL)
657 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
658 if (lsi->lsi_lmd->lmd_nidnet != NULL)
659 OBD_FREE(lsi->lsi_lmd->lmd_nidnet,
660 strlen(lsi->lsi_lmd->lmd_nidnet) + 1);
662 OBD_FREE_PTR(lsi->lsi_lmd);
665 LASSERT(lsi->lsi_llsbi == NULL);
667 s2lsi_nocast(sb) = NULL;
673 * The lsi has one reference for every server that is using the disk -
674 * e.g. MDT, MGS, and potentially MGC
676 int lustre_put_lsi(struct super_block *sb)
678 struct lustre_sb_info *lsi = s2lsi(sb);
682 LASSERT(lsi != NULL);
684 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
685 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
686 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
687 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
688 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
689 lsi->lsi_dt_dev = NULL;
690 obd_disconnect(lsi->lsi_osd_exp);
691 /* wait till OSD is gone */
692 obd_zombie_barrier();
701 * The goal of this function is to extract the file system name
702 * from the OBD name. This can come in two flavors. One is
703 * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
704 * number. In both cases we should return fsname. If it is
705 * not a valid OBD name it is assumed to be the file system
708 void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
715 * First we have to see if the @tgt has '-' at all. It is
716 * valid for the user to request something like
717 * lctl set_param -P llite.lustre*.xattr_cache=0
719 ptr = strrchr(tgt, '-');
721 /* No '-' means it could end in '*' */
722 ptr = strchr(tgt, '*');
724 /* No '*' either. Assume tgt = fsname */
732 /* tgt format fsname-MDT0000-* */
733 if ((!strncmp(ptr, "-MDT", 4) ||
734 !strncmp(ptr, "-OST", 4)) &&
735 (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
736 isxdigit(ptr[6]) && isxdigit(ptr[7]))) {
742 * tgt_format fsname-cli'dev'-'uuid' except for the llite case
743 * which are named fsname-'uuid'. Examples:
745 * lustre-clilov-ffff88104db5b800
746 * lustre-ffff88104db5b800 (for llite device)
748 * The length of the OBD uuid can vary on different platforms.
749 * This test if any invalid characters are in string. Allow
750 * wildcards with '*' character.
753 if (!strspn(ptr, "0123456789abcdefABCDEF*")) {
759 * Now that we validated the device name lets extract the
760 * file system name. Most of the names in this class will
761 * have '-cli' in its name which needs to be dropped. If
762 * it doesn't have '-cli' then its a llite device which
763 * ptr already points to the start of the uuid string.
765 tmp = strstr(tgt, "-cli");
772 len = min_t(size_t, len, LUSTRE_MAXFSNAME);
773 snprintf(fsname, buflen, "%.*s", (int)len, tgt);
777 EXPORT_SYMBOL(obdname2fsname);
781 * <FSNAME><SEPARATOR><TYPE><INDEX>
782 * FSNAME is between 1 and 8 characters (inclusive).
783 * Excluded characters are '/' and ':'
784 * SEPARATOR is either ':' or '-'
785 * TYPE: "OST", "MDT", etc.
786 * INDEX: Hex representation of the index
790 * Get the fsname ("lustre") from the server name ("lustre-OST003F").
791 * @param [in] svname server name including type and index
792 * @param [out] fsname Buffer to copy filesystem name prefix into.
793 * Must have at least 'strlen(fsname) + 1' chars.
794 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
797 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
801 dash = svname + strnlen(svname, LUSTRE_MAXFSNAME);
802 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
807 if (fsname != NULL) {
808 strncpy(fsname, svname, dash - svname);
809 fsname[dash - svname] = '\0';
817 EXPORT_SYMBOL(server_name2fsname);
820 * Get service name (svname) from string
822 * if endptr isn't NULL it is set to end of fsname *
824 int server_name2svname(const char *label, char *svname, const char **endptr,
830 /* We use server_name2fsname() just for parsing */
831 rc = server_name2fsname(label, NULL, &dash);
838 if (strlcpy(svname, dash + 1, svsize) >= svsize)
843 EXPORT_SYMBOL(server_name2svname);
846 * check server name is OST.
848 int server_name_is_ost(const char *svname)
853 /* We use server_name2fsname() just for parsing */
854 rc = server_name2fsname(svname, NULL, &dash);
860 if (strncmp(dash, "OST", 3) == 0)
864 EXPORT_SYMBOL(server_name_is_ost);
867 * Get the index from the target name MDTXXXX/OSTXXXX
868 * rc = server type, or rc < 0 on error
870 int target_name2index(const char *tgtname, __u32 *idx, const char **endptr)
872 const char *dash = tgtname;
876 if (strncmp(dash, "MDT", 3) == 0)
877 rc = LDD_F_SV_TYPE_MDT;
878 else if (strncmp(dash, "OST", 3) == 0)
879 rc = LDD_F_SV_TYPE_OST;
885 if (strncmp(dash, "all", 3) == 0) {
888 return rc | LDD_F_SV_ALL;
891 index = simple_strtoul(dash, (char **)endptr, 16);
900 EXPORT_SYMBOL(target_name2index);
903 * Get the index from the OBD name.
904 * rc = server type, or
906 * if endptr isn't NULL it is set to end of name
908 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
913 /* We use server_name2fsname() just for parsing */
914 rc = server_name2fsname(svname, NULL, &dash);
919 rc = target_name2index(dash, idx, endptr);
923 /* Account for -mdc after index that is possible when specifying mdt */
924 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
925 sizeof(LUSTRE_MDC_NAME)-1) == 0)
926 *endptr += sizeof(LUSTRE_MDC_NAME);
930 EXPORT_SYMBOL(server_name2index);
932 /*************** mount common betweeen server and client ***************/
935 int lustre_common_put_super(struct super_block *sb)
941 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
943 /* Drop a ref to the MGC */
944 rc = lustre_stop_mgc(sb);
945 if (rc && (rc != -ENOENT)) {
947 CERROR("Can't stop MGC: %d\n", rc);
951 * BUSY just means that there's some other OBD that
952 * needs the mgc. Let him clean it up.
954 CDEBUG(D_MOUNT, "MGC still in use\n");
956 /* Drop a ref to the mounted disk */
961 EXPORT_SYMBOL(lustre_common_put_super);
963 static void lmd_print(struct lustre_mount_data *lmd)
967 PRINT_CMD(D_MOUNT, " mount data:\n");
968 if (lmd_is_client(lmd))
969 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
970 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
971 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
974 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
976 if (lmd->lmd_recovery_time_soft)
977 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
978 lmd->lmd_recovery_time_soft);
980 if (lmd->lmd_recovery_time_hard)
981 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
982 lmd->lmd_recovery_time_hard);
984 for (i = 0; i < lmd->lmd_exclude_count; i++) {
985 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
986 lmd->lmd_exclude[i]);
990 /* Is this server on the exclusion list */
991 int lustre_check_exclusion(struct super_block *sb, char *svname)
993 struct lustre_sb_info *lsi = s2lsi(sb);
994 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1000 rc = server_name2index(svname, &index, NULL);
1001 if (rc != LDD_F_SV_TYPE_OST)
1002 /* Only exclude OSTs */
1005 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1006 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1008 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1009 if (index == lmd->lmd_exclude[i]) {
1010 CWARN("Excluding %s (on exclusion list)\n", svname);
1017 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1018 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
1020 const char *s1 = ptr, *s2;
1021 __u32 *exclude_list;
1028 * The shortest an ost name can be is 8 chars: -OST0000.
1029 * We don't actually know the fsname at this time, so in fact
1030 * a user could specify any fsname.
1032 devmax = strlen(ptr) / 8 + 1;
1034 /* temp storage until we figure out how many we have */
1035 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
1039 /* we enter this fn pointing at the '=' */
1040 while (*s1 && *s1 != ' ' && *s1 != ',') {
1042 rc = server_name2index(s1, &index, &s2);
1044 CERROR("Can't parse server name '%s': rc = %d\n",
1048 if (rc == LDD_F_SV_TYPE_OST)
1049 exclude_list[lmd->lmd_exclude_count++] = index;
1051 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
1052 (uint)(s2-s1), s1, rc);
1055 * now we are pointing at ':' (next exclude)
1056 * or ',' (end of excludes)
1058 if (lmd->lmd_exclude_count >= devmax)
1061 if (rc >= 0) /* non-err */
1064 if (lmd->lmd_exclude_count) {
1065 /* permanent, freed in lustre_free_lsi */
1066 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1067 lmd->lmd_exclude_count);
1068 if (lmd->lmd_exclude) {
1069 memcpy(lmd->lmd_exclude, exclude_list,
1070 sizeof(index) * lmd->lmd_exclude_count);
1073 lmd->lmd_exclude_count = 0;
1076 OBD_FREE(exclude_list, sizeof(index) * devmax);
1080 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1085 if (lmd->lmd_mgssec != NULL) {
1086 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1087 lmd->lmd_mgssec = NULL;
1090 tail = strchr(ptr, ',');
1092 length = strlen(ptr);
1094 length = tail - ptr;
1096 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1097 if (lmd->lmd_mgssec == NULL)
1100 memcpy(lmd->lmd_mgssec, ptr, length);
1101 lmd->lmd_mgssec[length] = '\0';
1105 static int lmd_parse_network(struct lustre_mount_data *lmd, char *ptr)
1110 if (lmd->lmd_nidnet != NULL) {
1111 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1112 lmd->lmd_nidnet = NULL;
1115 tail = strchr(ptr, ',');
1117 length = strlen(ptr);
1119 length = tail - ptr;
1121 OBD_ALLOC(lmd->lmd_nidnet, length + 1);
1122 if (lmd->lmd_nidnet == NULL)
1125 memcpy(lmd->lmd_nidnet, ptr, length);
1126 lmd->lmd_nidnet[length] = '\0';
1130 static int lmd_parse_string(char **handle, char *ptr)
1135 if ((handle == NULL) || (ptr == NULL))
1138 if (*handle != NULL) {
1139 OBD_FREE(*handle, strlen(*handle) + 1);
1143 tail = strchr(ptr, ',');
1145 length = strlen(ptr);
1147 length = tail - ptr;
1149 OBD_ALLOC(*handle, length + 1);
1150 if (*handle == NULL)
1153 memcpy(*handle, ptr, length);
1154 (*handle)[length] = '\0';
1159 /* Collect multiple values for mgsnid specifiers */
1160 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
1168 /* Find end of NID-list */
1169 while (class_parse_nid_quiet(tail, &nid, &tail) == 0)
1172 length = tail - *ptr;
1174 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
1178 if (lmd->lmd_mgs != NULL)
1179 oldlen = strlen(lmd->lmd_mgs) + 1;
1181 OBD_ALLOC(mgsnid, oldlen + length + 1);
1185 if (lmd->lmd_mgs != NULL) {
1186 /* Multiple mgsnid= are taken to mean failover locations */
1187 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
1188 mgsnid[oldlen - 1] = ':';
1189 OBD_FREE(lmd->lmd_mgs, oldlen);
1191 memcpy(mgsnid + oldlen, *ptr, length);
1192 mgsnid[oldlen + length] = '\0';
1193 lmd->lmd_mgs = mgsnid;
1200 * Find the first delimiter (comma or colon) from the specified \a buf and
1201 * make \a *endh point to the string starting with the delimiter. The commas
1202 * in expression list [...] will be skipped.
1204 * @buf a delimiter-separated string
1205 * @endh a pointer to a pointer that will point to the string
1206 * starting with the delimiter
1208 * RETURNS true if delimiter is found, false if delimiter is not found
1210 static bool lmd_find_delimiter(char *buf, char **endh)
1219 if (*c == ',' || *c == ':')
1222 pos = strcspn(c, "[:,]");
1226 /* Not a valid mount string */
1228 CWARN("invalid mount string format\n");
1236 /* invalid mount string */
1238 CWARN("invalid mount string format\n");
1253 * Find the first valid string delimited by comma or colon from the specified
1254 * \a buf and parse it to see whether it's a valid NID list. If yes, \a *endh
1255 * will point to the next string starting with the delimiter.
1257 * \param[in] buf a delimiter-separated string
1258 * \param[in] endh a pointer to a pointer that will point to the string
1259 * starting with the delimiter
1261 * \retval 0 if the string is a valid NID list
1262 * \retval 1 if the string is not a valid NID list
1264 static int lmd_parse_nidlist(char *buf, char **endh)
1266 struct list_head nidlist;
1273 while (*buf == ',' || *buf == ':')
1275 if (*buf == ' ' || *buf == '/' || *buf == '\0')
1278 if (!lmd_find_delimiter(buf, &endp))
1279 endp = buf + strlen(buf);
1284 INIT_LIST_HEAD(&nidlist);
1285 if (cfs_parse_nidlist(buf, strlen(buf), &nidlist) <= 0)
1287 cfs_free_nidlist(&nidlist);
1298 * Parse mount line options
1299 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1300 * dev is passed as device=uml1:/lustre by mount.lustre_tgt
1302 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1304 char *s1, *s2, *devname = NULL;
1305 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1312 LCONSOLE_ERROR_MSG(0x162,
1313 "Missing mount data: check /sbin/mount.lustre_tgt is installed.\n");
1317 /* Options should be a string - try to detect old lmd data */
1318 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1319 LCONSOLE_ERROR_MSG(0x163,
1320 "Using an old version of /sbin/mount.lustre. Please install version %s\n",
1321 LUSTRE_VERSION_STRING);
1324 lmd->lmd_magic = LMD_MAGIC;
1326 OBD_ALLOC(lmd->lmd_params, LMD_PARAMS_MAXLEN);
1327 if (lmd->lmd_params == NULL)
1329 lmd->lmd_params[0] = '\0';
1331 /* Set default flags here */
1336 int time_min = OBD_RECOVERY_TIME_MIN;
1339 /* Skip whitespace and extra commas */
1340 while (*s1 == ' ' || *s1 == ',')
1345 * Client options are parsed in ll_options: eg. flock,
1350 * Parse non-ldiskfs options here. Rather than modifying
1351 * ldiskfs, we just zero these out here
1353 if (strncmp(s1, "abort_recov", 11) == 0) {
1354 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1356 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1357 lmd->lmd_recovery_time_soft =
1358 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1361 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1362 lmd->lmd_recovery_time_hard =
1363 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1366 } else if (strncmp(s1, "noir", 4) == 0) {
1367 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1369 } else if (strncmp(s1, "nosvc", 5) == 0) {
1370 lmd->lmd_flags |= LMD_FLG_NOSVC;
1372 } else if (strncmp(s1, "nomgs", 5) == 0) {
1373 lmd->lmd_flags |= LMD_FLG_NOMGS;
1375 } else if (strncmp(s1, "noscrub", 7) == 0) {
1376 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1378 } else if (strncmp(s1, "skip_lfsck", 10) == 0) {
1379 lmd->lmd_flags |= LMD_FLG_SKIP_LFSCK;
1381 } else if (strncmp(s1, "rdonly_dev", 10) == 0) {
1382 lmd->lmd_flags |= LMD_FLG_DEV_RDONLY;
1384 } else if (strncmp(s1, PARAM_MGSNODE,
1385 sizeof(PARAM_MGSNODE) - 1) == 0) {
1386 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1388 * Assume the next mount opt is the first
1389 * invalid NID we get to.
1391 rc = lmd_parse_mgs(lmd, &s2);
1396 } else if (strncmp(s1, "writeconf", 9) == 0) {
1397 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1399 } else if (strncmp(s1, "update", 6) == 0) {
1400 lmd->lmd_flags |= LMD_FLG_UPDATE;
1402 } else if (strncmp(s1, "virgin", 6) == 0) {
1403 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1405 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1406 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1408 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1409 rc = lmd_parse_mgssec(lmd, s1 + 7);
1413 /* ost exclusion list */
1414 } else if (strncmp(s1, "exclude=", 8) == 0) {
1415 rc = lmd_make_exclusion(lmd, s1 + 7);
1419 } else if (strncmp(s1, "mgs", 3) == 0) {
1421 lmd->lmd_flags |= LMD_FLG_MGS;
1423 } else if (strncmp(s1, "svname=", 7) == 0) {
1424 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1428 } else if (strncmp(s1, "param=", 6) == 0) {
1429 size_t length, params_length;
1432 if (lmd_find_delimiter(s1 + 6, &tail)) {
1433 char *param_str = tail + 1;
1434 int supplementary = 1;
1436 while (lmd_parse_nidlist(param_str,
1440 length = param_str - s1 - supplementary;
1442 length = strlen(s1);
1445 params_length = strlen(lmd->lmd_params);
1446 if (params_length + length + 1 >= LMD_PARAMS_MAXLEN)
1448 strncat(lmd->lmd_params, s1 + 6, length);
1449 lmd->lmd_params[params_length + length] = '\0';
1450 strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN);
1451 s3 = s1 + 6 + length;
1453 } else if (strncmp(s1, "osd=", 4) == 0) {
1454 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1460 * Linux 2.4 doesn't pass the device, so we stuck it at
1461 * the end of the options.
1463 else if (strncmp(s1, "device=", 7) == 0) {
1466 * terminate options right before device. device
1467 * must be the last one.
1471 } else if (strncmp(s1, "network=", 8) == 0) {
1472 rc = lmd_parse_network(lmd, s1 + 8);
1476 /* check if LNet dynamic peer discovery is activated */
1477 if (LNetGetPeerDiscoveryStatus()) {
1478 CERROR("LNet Dynamic Peer Discovery is enabled "
1479 "on this node. 'network' mount option "
1480 "cannot be taken into account.\n");
1488 s2 = strchr(s3, ',');
1496 memmove(s1, s2, strlen(s2) + 1);
1502 LCONSOLE_ERROR_MSG(0x164,
1503 "Can't find device name (need mount option 'device=...')\n");
1507 s1 = strstr(devname, ":/");
1510 lmd->lmd_flags |= LMD_FLG_CLIENT;
1511 /* Remove leading /s from fsname */
1512 while (*++s1 == '/')
1515 while (*s2 != '/' && *s2 != '\0')
1517 /* Freed in lustre_free_lsi */
1518 OBD_ALLOC(lmd->lmd_profile, s2 - s1 + 8);
1519 if (!lmd->lmd_profile)
1522 strncat(lmd->lmd_profile, s1, s2 - s1);
1523 strncat(lmd->lmd_profile, "-client", 7);
1526 s2 = s1 + strlen(s1) - 1;
1527 /* Remove padding /s from fileset */
1531 OBD_ALLOC(lmd->lmd_fileset, s2 - s1 + 2);
1532 if (lmd->lmd_fileset == NULL) {
1533 OBD_FREE(lmd->lmd_profile,
1534 strlen(lmd->lmd_profile) + 1);
1537 strncat(lmd->lmd_fileset, s1, s2 - s1 + 1);
1541 if (lmd->lmd_nidnet != NULL) {
1542 /* 'network=' mount option forbidden for server */
1543 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1544 lmd->lmd_nidnet = NULL;
1547 "%s: option 'network=' not allowed for Lustre servers: rc = %d\n",
1553 /* Freed in lustre_free_lsi */
1554 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1557 strncpy(lmd->lmd_dev, devname, strlen(devname)+1);
1559 /* Save mount options */
1560 s1 = options + strlen(options) - 1;
1561 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1563 while (*options && (*options == ',' || *options == ' '))
1565 if (*options != 0) {
1566 /* Freed in lustre_free_lsi */
1567 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1570 strncpy(lmd->lmd_opts, options, strlen(options)+1);
1574 lmd->lmd_magic = LMD_MAGIC;
1579 CERROR("Bad mount options %s\n", options);
1584 * This is the entry point for the mount call into Lustre.
1585 * This is called when a server or client is mounted,
1586 * and this is where we start setting things up.
1587 * @param data Mount options (e.g. -o flock,abort_recov)
1589 static int lustre_fill_super(struct super_block *sb, void *lmd2_data,
1592 struct lustre_mount_data *lmd;
1593 struct lustre_sb_info *lsi;
1598 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1600 lsi = lustre_init_lsi(sb);
1606 * Disable lockdep during mount, because mount locking patterns are
1612 * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
1614 obd_zombie_barrier();
1616 /* Figure out the lmd from the mount options */
1617 if (lmd_parse(lmd2_data, lmd)) {
1619 GOTO(out, rc = -EINVAL);
1622 if (lmd_is_client(lmd)) {
1623 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1624 if (client_fill_super == NULL)
1625 request_module("lustre");
1626 if (client_fill_super == NULL) {
1627 LCONSOLE_ERROR_MSG(0x165,
1628 "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
1632 rc = lustre_start_mgc(sb);
1634 lustre_common_put_super(sb);
1637 /* Connect and start */
1638 /* (should always be ll_fill_super) */
1639 rc = (*client_fill_super)(sb);
1640 /* c_f_s will call lustre_common_put_super on failure */
1643 #ifdef HAVE_SERVER_SUPPORT
1644 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1645 rc = server_fill_super(sb);
1647 * s_f_s calls lustre_start_mgc after the mount because we need
1648 * the MGS NIDs which are stored on disk. Plus, we may
1649 * need to start the MGS first.
1651 /* s_f_s will call server_put_super on failure */
1653 CERROR("client-side-only module, cannot handle server mount\n");
1659 * If error happens in fill_super() call, @lsi will be killed there.
1660 * This is why we do not put it here.
1665 CERROR("Unable to mount %s (%d)\n",
1666 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1668 CDEBUG(D_SUPER, "Mount %s complete\n",
1677 * We can't call ll_fill_super by name because it lives in a module that
1678 * must be loaded after this one.
1680 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb))
1682 client_fill_super = cfs;
1684 EXPORT_SYMBOL(lustre_register_client_fill_super);
1686 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1688 kill_super_cb = cfs;
1690 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1692 /***************** FS registration ******************/
1693 #ifdef HAVE_FSTYPE_MOUNT
1694 static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1695 const char *devname, void *data)
1697 return mount_nodev(fs_type, flags, data, lustre_fill_super);
1700 static int lustre_get_sb(struct file_system_type *fs_type, int flags,
1701 const char *devname, void *data, struct vfsmount *mnt)
1703 return get_sb_nodev(fs_type, flags, data, lustre_fill_super, mnt);
1707 static void lustre_kill_super(struct super_block *sb)
1709 struct lustre_sb_info *lsi = s2lsi(sb);
1711 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1712 (*kill_super_cb)(sb);
1714 kill_anon_super(sb);
1717 #ifdef HAVE_SERVER_SUPPORT
1718 /* Register the "lustre_tgt" fs type.
1720 * Right now this isn't any different than the normal "lustre" filesystem
1721 * type, but it is added so that there is some compatibility to allow
1722 * changing documentation and scripts to start using the "lustre_tgt" type
1723 * at mount time. That will simplify test interop, and in case of upgrades
1724 * that change to the new type and then need to roll back for some reason.
1726 * The long-term goal is to disentangle the client and server mount code.
1728 static struct file_system_type lustre_fs_type_tgt = {
1729 .owner = THIS_MODULE,
1730 .name = "lustre_tgt",
1731 #ifdef HAVE_FSTYPE_MOUNT
1732 .mount = lustre_mount,
1734 .get_sb = lustre_get_sb,
1736 .kill_sb = lustre_kill_super,
1737 .fs_flags = FS_REQUIRES_DEV | FS_RENAME_DOES_D_MOVE,
1739 MODULE_ALIAS_FS("lustre_tgt");
1741 #define register_filesystem_tgt(fstype) \
1745 _rc = register_filesystem(fstype); \
1746 if (_rc && _rc != -EBUSY) { \
1747 /* Don't fail if server code also registers "lustre_tgt" */ \
1748 CERROR("obdclass: register fstype '%s' failed: rc = %d\n", \
1749 (fstype)->name, _rc); \
1753 #define unregister_filesystem_tgt(fstype) unregister_filesystem(fstype)
1755 #define register_filesystem_tgt(fstype) do {} while (0)
1756 #define unregister_filesystem_tgt(fstype) do {} while (0)
1759 /* Register the "lustre" fs type */
1760 static struct file_system_type lustre_fs_type = {
1761 .owner = THIS_MODULE,
1763 #ifdef HAVE_FSTYPE_MOUNT
1764 .mount = lustre_mount,
1766 .get_sb = lustre_get_sb,
1768 .kill_sb = lustre_kill_super,
1769 .fs_flags = FS_RENAME_DOES_D_MOVE,
1771 MODULE_ALIAS_FS("lustre");
1773 int lustre_register_fs(void)
1775 register_filesystem_tgt(&lustre_fs_type_tgt);
1777 return register_filesystem(&lustre_fs_type);
1780 int lustre_unregister_fs(void)
1782 unregister_filesystem_tgt(&lustre_fs_type_tgt);
1784 return unregister_filesystem(&lustre_fs_type);