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>
52 #include <libcfs/crypto/llcrypt.h>
54 static DEFINE_SPINLOCK(client_lock);
55 static struct module *client_mod;
56 static int (*client_fill_super)(struct super_block *sb);
58 static void (*kill_super_cb)(struct super_block *sb);
60 /**************** config llog ********************/
63 * Get a config log from the MGS and process it.
64 * This func is called for both clients and servers.
65 * Continue to process new statements appended to the logs
66 * (whenever the config lock is revoked) until lustre_end_log
69 * @param sb The superblock is used by the MGC to write to the local copy of
71 * @param logname The name of the llog to replicate from the MGS
72 * @param cfg Since the same MGC may be used to follow multiple config logs
73 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
74 * this log, and is added to the mgc's list of logs to follow.
76 int lustre_process_log(struct super_block *sb, char *logname,
77 struct config_llog_instance *cfg)
79 struct lustre_cfg *lcfg;
80 struct lustre_cfg_bufs *bufs;
81 struct lustre_sb_info *lsi = s2lsi(sb);
82 struct obd_device *mgc = lsi->lsi_mgc;
94 /* mgc_process_config */
95 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
96 lustre_cfg_bufs_set_string(bufs, 1, logname);
97 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
98 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
99 OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
101 GOTO(out, rc = -ENOMEM);
102 lustre_cfg_init(lcfg, LCFG_LOG_START, bufs);
104 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
105 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
110 LCONSOLE_ERROR_MSG(0x15b,
111 "%s: Configuration from log %s failed from MGS %d. Check client and MGS are on compatible version.\n",
112 mgc->obd_name, logname, rc);
114 LCONSOLE_ERROR_MSG(0x15c,
115 "%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",
116 mgc->obd_name, logname, rc);
118 /* class_obd_list(); */
121 EXPORT_SYMBOL(lustre_process_log);
123 /* Stop watching this config log for updates */
124 int lustre_end_log(struct super_block *sb, char *logname,
125 struct config_llog_instance *cfg)
127 struct lustre_cfg *lcfg;
128 struct lustre_cfg_bufs bufs;
129 struct lustre_sb_info *lsi = s2lsi(sb);
130 struct obd_device *mgc = lsi->lsi_mgc;
138 /* mgc_process_config */
139 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
140 lustre_cfg_bufs_set_string(&bufs, 1, logname);
142 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
143 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
146 lustre_cfg_init(lcfg, LCFG_LOG_END, &bufs);
147 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
148 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
151 EXPORT_SYMBOL(lustre_end_log);
153 /**************** OBD start *******************/
156 * lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
157 * lctl (and do for echo cli/srv.
159 static int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
160 char *s1, char *s2, char *s3, char *s4)
162 struct lustre_cfg_bufs bufs;
163 struct lustre_cfg *lcfg = NULL;
166 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
167 cmd, s1, s2, s3, s4);
169 lustre_cfg_bufs_reset(&bufs, cfgname);
171 lustre_cfg_bufs_set_string(&bufs, 1, s1);
173 lustre_cfg_bufs_set_string(&bufs, 2, s2);
175 lustre_cfg_bufs_set_string(&bufs, 3, s3);
177 lustre_cfg_bufs_set_string(&bufs, 4, s4);
179 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
182 lustre_cfg_init(lcfg, cmd, &bufs);
183 lcfg->lcfg_nid = nid;
184 rc = class_process_config(lcfg);
185 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
190 * Call class_attach and class_setup. These methods in turn call
191 * OBD type-specific methods.
193 int lustre_start_simple(char *obdname, char *type, char *uuid,
194 char *s1, char *s2, char *s3, char *s4)
198 CDEBUG(D_MOUNT, "Starting OBD %s (typ=%s)\n", obdname, type);
200 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
202 CERROR("%s attach error %d\n", obdname, rc);
205 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
207 CERROR("%s setup error %d\n", obdname, rc);
208 do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
213 static DEFINE_MUTEX(mgc_start_lock);
216 * Set up a MGC OBD to process startup logs
218 * \param sb [in] super block of the MGC OBD
220 * \retval 0 success, otherwise error code
222 int lustre_start_mgc(struct super_block *sb)
224 struct obd_connect_data *data = NULL;
225 struct lustre_sb_info *lsi = s2lsi(sb);
226 struct obd_device *obd;
227 struct obd_export *exp;
228 struct obd_uuid *uuid = NULL;
231 char nidstr[LNET_NIDSTR_SIZE];
232 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
234 int rc = 0, i = 0, j;
239 LASSERT(lsi->lsi_lmd);
241 /* Find the first non-lo MGS NID for our MGC name */
242 if (IS_SERVER(lsi)) {
243 /* mount -o mgsnode=nid */
244 ptr = lsi->lsi_lmd->lmd_mgs;
245 if (lsi->lsi_lmd->lmd_mgs &&
246 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
248 } else if (IS_MGS(lsi)) {
249 struct lnet_process_id id;
251 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
252 if (id.nid == LNET_NID_LO_0)
259 } else { /* client */
260 /* Use NIDs from mount line: uml1,1@elan:uml2,2@elan:/lustre */
261 ptr = lsi->lsi_lmd->lmd_dev;
262 if (class_parse_nid(ptr, &nid, &ptr) == 0)
266 CERROR("No valid MGS NIDs found.\n");
270 mutex_lock(&mgc_start_lock);
272 libcfs_nid2str_r(nid, nidstr, sizeof(nidstr));
273 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(nidstr) + 1;
274 OBD_ALLOC(mgcname, len);
275 OBD_ALLOC(niduuid, len + 2);
276 if (mgcname == NULL || niduuid == NULL)
277 GOTO(out_free, rc = -ENOMEM);
278 snprintf(mgcname, len, "%s%s", LUSTRE_MGC_OBDNAME, nidstr);
280 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
284 GOTO(out_free, rc = -ENOMEM);
286 obd = class_name2obd(mgcname);
287 if (obd && !obd->obd_stopping) {
290 rc = obd_set_info_async(NULL, obd->obd_self_export,
291 strlen(KEY_MGSSEC), KEY_MGSSEC,
292 strlen(mgssec), mgssec, NULL);
296 /* Re-using an existing MGC */
297 atomic_inc(&obd->u.cli.cl_mgc_refcount);
299 /* IR compatibility check, only for clients */
300 if (lmd_is_client(lsi->lsi_lmd)) {
302 int vallen = sizeof(*data);
303 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
305 rc = obd_get_info(NULL, obd->obd_self_export,
306 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
309 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
310 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
311 /* LMD_FLG_NOIR is for test purpose only */
313 "Mounting client with IR setting not compatible with current MGC. Using MGC setting that is IR %s",
314 has_ir ? "enabled" : "disabled");
316 *flags &= ~LMD_FLG_NOIR;
318 *flags |= LMD_FLG_NOIR;
324 * If we are restarting the MGS, don't try to keep the MGC's
325 * old connection, or registration will fail.
328 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
333 * Try all connections, but only once (again).
334 * We don't want to block another target from starting
335 * (using its local copy of the log), but we do want to connect
336 * if at all possible.
339 CDEBUG(D_MOUNT, "%s:Set MGC reconnect %d\n", mgcname, recov_bk);
340 rc = obd_set_info_async(NULL, obd->obd_self_export,
341 sizeof(KEY_INIT_RECOV_BACKUP),
342 KEY_INIT_RECOV_BACKUP,
343 sizeof(recov_bk), &recov_bk, NULL);
347 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
349 /* Add the primary NIDs for the MGS */
351 snprintf(niduuid, len + 2, "%s_%x", mgcname, i);
352 if (IS_SERVER(lsi)) {
353 ptr = lsi->lsi_lmd->lmd_mgs;
354 CDEBUG(D_MOUNT, "mgs NIDs %s.\n", ptr);
356 /* Use local NIDs (including LO) */
357 struct lnet_process_id id;
359 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
360 rc = do_lcfg(mgcname, id.nid, LCFG_ADD_UUID,
361 niduuid, NULL, NULL, NULL);
364 /* Use mgsnode= nids */
365 /* mount -o mgsnode=nid */
366 if (lsi->lsi_lmd->lmd_mgs) {
367 ptr = lsi->lsi_lmd->lmd_mgs;
368 } else if (class_find_param(ptr, PARAM_MGSNODE,
370 CERROR("No MGS NIDs given.\n");
371 GOTO(out_free, rc = -EINVAL);
374 * Add primary MGS NID(s).
375 * Multiple NIDs on one MGS node are separated
378 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
379 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
380 niduuid, NULL, NULL, NULL);
383 /* Stop at the first failover NID */
388 } else { /* client */
389 /* Use NIDs from mount line: uml1,1@elan:uml2,2@elan:/lustre */
390 ptr = lsi->lsi_lmd->lmd_dev;
391 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
392 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
393 niduuid, NULL, NULL, NULL);
396 /* Stop at the first failover NID */
402 CERROR("No valid MGS NIDs found.\n");
403 GOTO(out_free, rc = -EINVAL);
405 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
407 /* Random uuid for MGC allows easier reconnects */
410 GOTO(out_free, rc = -ENOMEM);
412 generate_random_uuid(uuidc.b);
413 snprintf(uuid->uuid, sizeof(*uuid), "%pU", uuidc.b);
416 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
417 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
418 niduuid, NULL, NULL);
422 /* Add any failover MGS NIDs */
424 while (ptr && ((*ptr == ':' ||
425 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
426 /* New failover node */
427 sprintf(niduuid, "%s_%x", mgcname, i);
429 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
430 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
431 niduuid, NULL, NULL, NULL);
438 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
439 niduuid, NULL, NULL, NULL);
447 lsi->lsi_lmd->lmd_mgs_failnodes = i;
449 obd = class_name2obd(mgcname);
451 CERROR("Can't find mgcobd %s\n", mgcname);
452 GOTO(out_free, rc = -ENOTCONN);
455 rc = obd_set_info_async(NULL, obd->obd_self_export,
456 strlen(KEY_MGSSEC), KEY_MGSSEC,
457 strlen(mgssec), mgssec, NULL);
462 * Keep a refcount of servers/clients who started with "mount",
463 * so we know when we can get rid of the mgc.
465 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
467 /* We connect to the MGS at setup, and don't disconnect until cleanup */
468 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
469 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
470 OBD_CONNECT_LVB_TYPE |
471 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_BARRIER;
473 if (lmd_is_client(lsi->lsi_lmd) &&
474 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
475 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
476 data->ocd_version = LUSTRE_VERSION_CODE;
477 rc = obd_connect(NULL, &exp, obd, uuid, data, NULL);
479 CERROR("connect failed %d\n", rc);
483 obd->u.cli.cl_mgc_mgsexp = exp;
487 * Keep the MGC info in the sb. Note that many lsi's can point
492 mutex_unlock(&mgc_start_lock);
499 OBD_FREE(mgcname, len);
501 OBD_FREE(niduuid, len + 2);
505 static int lustre_stop_mgc(struct super_block *sb)
507 struct lustre_sb_info *lsi = s2lsi(sb);
508 struct obd_device *obd;
509 char *niduuid = NULL, *ptr = NULL;
510 int i, rc = 0, len = 0;
521 mutex_lock(&mgc_start_lock);
522 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
523 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
525 * This is not fatal, every client that stops
528 CDEBUG(D_MOUNT, "MGC still has %d references.\n",
529 atomic_read(&obd->u.cli.cl_mgc_refcount));
530 GOTO(out, rc = -EBUSY);
534 * The MGC has no recoverable data in any case.
535 * force shotdown set in umount_begin
537 obd->obd_no_recov = 1;
539 if (obd->u.cli.cl_mgc_mgsexp) {
541 * An error is not fatal, if we are unable to send the
542 * disconnect mgs ping evictor cleans up the export
544 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
546 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
550 * Save the obdname for cleaning the nid uuids, which are
553 len = strlen(obd->obd_name) + 6;
554 OBD_ALLOC(niduuid, len);
556 strcpy(niduuid, obd->obd_name);
557 ptr = niduuid + strlen(niduuid);
560 rc = class_manual_cleanup(obd);
564 /* Clean the nid uuids */
566 GOTO(out, rc = -ENOMEM);
568 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
569 sprintf(ptr, "_%x", i);
570 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
571 niduuid, NULL, NULL, NULL);
573 CERROR("del MDC UUID %s failed: rc = %d\n",
578 OBD_FREE(niduuid, len);
580 /* class_import_put will get rid of the additional connections */
581 mutex_unlock(&mgc_start_lock);
585 /***************** lustre superblock **************/
587 static struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
589 struct lustre_sb_info *lsi;
596 OBD_ALLOC_PTR(lsi->lsi_lmd);
602 s2lsi_nocast(sb) = lsi;
603 /* we take 1 extra ref for our setup */
604 atomic_set(&lsi->lsi_mounts, 1);
606 /* Default umount style */
607 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
608 INIT_LIST_HEAD(&lsi->lsi_lwp_list);
609 mutex_init(&lsi->lsi_lwp_mutex);
614 static int lustre_free_lsi(struct super_block *sb)
616 struct lustre_sb_info *lsi = s2lsi(sb);
620 LASSERT(lsi != NULL);
621 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
623 /* someone didn't call server_put_mount. */
624 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
627 if (lsi->lsi_lmd != NULL) {
628 if (lsi->lsi_lmd->lmd_dev != NULL)
629 OBD_FREE(lsi->lsi_lmd->lmd_dev,
630 strlen(lsi->lsi_lmd->lmd_dev) + 1);
631 if (lsi->lsi_lmd->lmd_profile != NULL)
632 OBD_FREE(lsi->lsi_lmd->lmd_profile,
633 strlen(lsi->lsi_lmd->lmd_profile) + 1);
634 if (lsi->lsi_lmd->lmd_fileset != NULL)
635 OBD_FREE(lsi->lsi_lmd->lmd_fileset,
636 strlen(lsi->lsi_lmd->lmd_fileset) + 1);
637 if (lsi->lsi_lmd->lmd_mgssec != NULL)
638 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
639 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
640 if (lsi->lsi_lmd->lmd_opts != NULL)
641 OBD_FREE(lsi->lsi_lmd->lmd_opts,
642 strlen(lsi->lsi_lmd->lmd_opts) + 1);
643 if (lsi->lsi_lmd->lmd_exclude_count)
644 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
645 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
646 lsi->lsi_lmd->lmd_exclude_count);
647 if (lsi->lsi_lmd->lmd_mgs != NULL)
648 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
649 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
650 if (lsi->lsi_lmd->lmd_osd_type != NULL)
651 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
652 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
653 if (lsi->lsi_lmd->lmd_params != NULL)
654 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
655 if (lsi->lsi_lmd->lmd_nidnet != NULL)
656 OBD_FREE(lsi->lsi_lmd->lmd_nidnet,
657 strlen(lsi->lsi_lmd->lmd_nidnet) + 1);
659 OBD_FREE_PTR(lsi->lsi_lmd);
662 LASSERT(lsi->lsi_llsbi == NULL);
664 s2lsi_nocast(sb) = NULL;
670 * The lsi has one reference for every server that is using the disk -
671 * e.g. MDT, MGS, and potentially MGC
673 int lustre_put_lsi(struct super_block *sb)
675 struct lustre_sb_info *lsi = s2lsi(sb);
679 LASSERT(lsi != NULL);
681 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
682 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
683 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
684 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
685 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
686 lsi->lsi_dt_dev = NULL;
687 obd_disconnect(lsi->lsi_osd_exp);
688 /* wait till OSD is gone */
689 obd_zombie_barrier();
696 EXPORT_SYMBOL(lustre_put_lsi);
699 * The goal of this function is to extract the file system name
700 * from the OBD name. This can come in two flavors. One is
701 * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
702 * number. In both cases we should return fsname. If it is
703 * not a valid OBD name it is assumed to be the file system
706 void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
713 * First we have to see if the @tgt has '-' at all. It is
714 * valid for the user to request something like
715 * lctl set_param -P llite.lustre*.xattr_cache=0
717 ptr = strrchr(tgt, '-');
719 /* No '-' means it could end in '*' */
720 ptr = strchr(tgt, '*');
722 /* No '*' either. Assume tgt = fsname */
730 /* tgt format fsname-MDT0000-* */
731 if ((!strncmp(ptr, "-MDT", 4) ||
732 !strncmp(ptr, "-OST", 4)) &&
733 (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
734 isxdigit(ptr[6]) && isxdigit(ptr[7]))) {
740 * tgt_format fsname-cli'dev'-'uuid' except for the llite case
741 * which are named fsname-'uuid'. Examples:
743 * lustre-clilov-ffff88104db5b800
744 * lustre-ffff88104db5b800 (for llite device)
746 * The length of the OBD uuid can vary on different platforms.
747 * This test if any invalid characters are in string. Allow
748 * wildcards with '*' character.
751 if (!strspn(ptr, "0123456789abcdefABCDEF*")) {
757 * Now that we validated the device name lets extract the
758 * file system name. Most of the names in this class will
759 * have '-cli' in its name which needs to be dropped. If
760 * it doesn't have '-cli' then its a llite device which
761 * ptr already points to the start of the uuid string.
763 tmp = strstr(tgt, "-cli");
770 len = min_t(size_t, len, LUSTRE_MAXFSNAME);
771 snprintf(fsname, buflen, "%.*s", (int)len, tgt);
775 EXPORT_SYMBOL(obdname2fsname);
779 * <FSNAME><SEPARATOR><TYPE><INDEX>
780 * FSNAME is between 1 and 8 characters (inclusive).
781 * Excluded characters are '/' and ':'
782 * SEPARATOR is either ':' or '-'
783 * TYPE: "OST", "MDT", etc.
784 * INDEX: Hex representation of the index
788 * Get the fsname ("lustre") from the server name ("lustre-OST003F").
789 * @param [in] svname server name including type and index
790 * @param [out] fsname Buffer to copy filesystem name prefix into.
791 * Must have at least 'strlen(fsname) + 1' chars.
792 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
795 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
799 dash = svname + strnlen(svname, LUSTRE_MAXFSNAME);
800 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
805 if (fsname != NULL) {
806 strncpy(fsname, svname, dash - svname);
807 fsname[dash - svname] = '\0';
815 EXPORT_SYMBOL(server_name2fsname);
818 * Get service name (svname) from string
820 * if endptr isn't NULL it is set to end of fsname *
822 int server_name2svname(const char *label, char *svname, const char **endptr,
828 /* We use server_name2fsname() just for parsing */
829 rc = server_name2fsname(label, NULL, &dash);
836 if (strlcpy(svname, dash + 1, svsize) >= svsize)
841 EXPORT_SYMBOL(server_name2svname);
844 * check server name is OST.
846 int server_name_is_ost(const char *svname)
851 /* We use server_name2fsname() just for parsing */
852 rc = server_name2fsname(svname, NULL, &dash);
858 if (strncmp(dash, "OST", 3) == 0)
862 EXPORT_SYMBOL(server_name_is_ost);
865 * Get the index from the target name MDTXXXX/OSTXXXX
866 * rc = server type, or rc < 0 on error
868 int target_name2index(const char *tgtname, __u32 *idx, const char **endptr)
870 const char *dash = tgtname;
874 if (strncmp(dash, "MDT", 3) == 0)
875 rc = LDD_F_SV_TYPE_MDT;
876 else if (strncmp(dash, "OST", 3) == 0)
877 rc = LDD_F_SV_TYPE_OST;
883 if (strncmp(dash, "all", 3) == 0) {
886 return rc | LDD_F_SV_ALL;
889 index = simple_strtoul(dash, (char **)endptr, 16);
898 EXPORT_SYMBOL(target_name2index);
901 * Get the index from the OBD name.
902 * rc = server type, or
904 * if endptr isn't NULL it is set to end of name
906 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
911 /* We use server_name2fsname() just for parsing */
912 rc = server_name2fsname(svname, NULL, &dash);
917 rc = target_name2index(dash, idx, endptr);
921 /* Account for -mdc after index that is possible when specifying mdt */
922 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
923 sizeof(LUSTRE_MDC_NAME)-1) == 0)
924 *endptr += sizeof(LUSTRE_MDC_NAME);
928 EXPORT_SYMBOL(server_name2index);
930 /*************** mount common betweeen server and client ***************/
933 int lustre_common_put_super(struct super_block *sb)
939 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
941 /* Drop a ref to the MGC */
942 rc = lustre_stop_mgc(sb);
943 if (rc && (rc != -ENOENT)) {
945 CERROR("Can't stop MGC: %d\n", rc);
949 * BUSY just means that there's some other OBD that
950 * needs the mgc. Let him clean it up.
952 CDEBUG(D_MOUNT, "MGC still in use\n");
954 /* Drop a ref to the mounted disk */
959 EXPORT_SYMBOL(lustre_common_put_super);
961 static void lmd_print(struct lustre_mount_data *lmd)
965 PRINT_CMD(D_MOUNT, " mount data:\n");
966 if (lmd_is_client(lmd))
967 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
968 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
969 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
972 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
974 if (lmd->lmd_recovery_time_soft)
975 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
976 lmd->lmd_recovery_time_soft);
978 if (lmd->lmd_recovery_time_hard)
979 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
980 lmd->lmd_recovery_time_hard);
982 for (i = 0; i < lmd->lmd_exclude_count; i++) {
983 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
984 lmd->lmd_exclude[i]);
988 /* Is this server on the exclusion list */
989 int lustre_check_exclusion(struct super_block *sb, char *svname)
991 struct lustre_sb_info *lsi = s2lsi(sb);
992 struct lustre_mount_data *lmd = lsi->lsi_lmd;
998 rc = server_name2index(svname, &index, NULL);
999 if (rc != LDD_F_SV_TYPE_OST)
1000 /* Only exclude OSTs */
1003 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1004 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1006 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1007 if (index == lmd->lmd_exclude[i]) {
1008 CWARN("Excluding %s (on exclusion list)\n", svname);
1015 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1016 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
1018 const char *s1 = ptr, *s2;
1019 __u32 *exclude_list;
1026 * The shortest an ost name can be is 8 chars: -OST0000.
1027 * We don't actually know the fsname at this time, so in fact
1028 * a user could specify any fsname.
1030 devmax = strlen(ptr) / 8 + 1;
1032 /* temp storage until we figure out how many we have */
1033 OBD_ALLOC_PTR_ARRAY(exclude_list, devmax);
1037 /* we enter this fn pointing at the '=' */
1038 while (*s1 && *s1 != ' ' && *s1 != ',') {
1040 rc = server_name2index(s1, &index, &s2);
1042 CERROR("Can't parse server name '%s': rc = %d\n",
1046 if (rc == LDD_F_SV_TYPE_OST)
1047 exclude_list[lmd->lmd_exclude_count++] = index;
1049 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
1050 (uint)(s2-s1), s1, rc);
1053 * now we are pointing at ':' (next exclude)
1054 * or ',' (end of excludes)
1056 if (lmd->lmd_exclude_count >= devmax)
1059 if (rc >= 0) /* non-err */
1062 if (lmd->lmd_exclude_count) {
1063 /* permanent, freed in lustre_free_lsi */
1064 OBD_ALLOC_PTR_ARRAY(lmd->lmd_exclude,
1065 lmd->lmd_exclude_count);
1066 if (lmd->lmd_exclude) {
1067 memcpy(lmd->lmd_exclude, exclude_list,
1068 sizeof(index) * lmd->lmd_exclude_count);
1071 lmd->lmd_exclude_count = 0;
1074 OBD_FREE_PTR_ARRAY(exclude_list, devmax);
1078 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1083 if (lmd->lmd_mgssec != NULL) {
1084 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1085 lmd->lmd_mgssec = NULL;
1088 tail = strchr(ptr, ',');
1090 length = strlen(ptr);
1092 length = tail - ptr;
1094 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1095 if (lmd->lmd_mgssec == NULL)
1098 memcpy(lmd->lmd_mgssec, ptr, length);
1099 lmd->lmd_mgssec[length] = '\0';
1103 static int lmd_parse_network(struct lustre_mount_data *lmd, char *ptr)
1108 if (lmd->lmd_nidnet != NULL) {
1109 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1110 lmd->lmd_nidnet = NULL;
1113 tail = strchr(ptr, ',');
1115 length = strlen(ptr);
1117 length = tail - ptr;
1119 OBD_ALLOC(lmd->lmd_nidnet, length + 1);
1120 if (lmd->lmd_nidnet == NULL)
1123 memcpy(lmd->lmd_nidnet, ptr, length);
1124 lmd->lmd_nidnet[length] = '\0';
1128 static int lmd_parse_string(char **handle, char *ptr)
1133 if ((handle == NULL) || (ptr == NULL))
1136 if (*handle != NULL) {
1137 OBD_FREE(*handle, strlen(*handle) + 1);
1141 tail = strchr(ptr, ',');
1143 length = strlen(ptr);
1145 length = tail - ptr;
1147 OBD_ALLOC(*handle, length + 1);
1148 if (*handle == NULL)
1151 memcpy(*handle, ptr, length);
1152 (*handle)[length] = '\0';
1157 /* Collect multiple values for mgsnid specifiers */
1158 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
1166 /* Find end of NID-list */
1167 while (class_parse_nid_quiet(tail, &nid, &tail) == 0)
1170 length = tail - *ptr;
1172 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
1176 if (lmd->lmd_mgs != NULL)
1177 oldlen = strlen(lmd->lmd_mgs) + 1;
1179 OBD_ALLOC(mgsnid, oldlen + length + 1);
1183 if (lmd->lmd_mgs != NULL) {
1184 /* Multiple mgsnid= are taken to mean failover locations */
1185 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
1186 mgsnid[oldlen - 1] = ':';
1187 OBD_FREE(lmd->lmd_mgs, oldlen);
1189 memcpy(mgsnid + oldlen, *ptr, length);
1190 mgsnid[oldlen + length] = '\0';
1191 lmd->lmd_mgs = mgsnid;
1198 * Find the first delimiter (comma or colon) from the specified \a buf and
1199 * make \a *endh point to the string starting with the delimiter. The commas
1200 * in expression list [...] will be skipped.
1202 * @buf a delimiter-separated string
1203 * @endh a pointer to a pointer that will point to the string
1204 * starting with the delimiter
1206 * RETURNS true if delimiter is found, false if delimiter is not found
1208 static bool lmd_find_delimiter(char *buf, char **endh)
1217 if (*c == ',' || *c == ':')
1220 pos = strcspn(c, "[:,]");
1224 /* Not a valid mount string */
1226 CWARN("invalid mount string format\n");
1234 /* invalid mount string */
1236 CWARN("invalid mount string format\n");
1251 * Find the first valid string delimited by comma or colon from the specified
1252 * \a buf and parse it to see whether it's a valid NID list. If yes, \a *endh
1253 * will point to the next string starting with the delimiter.
1255 * \param[in] buf a delimiter-separated string
1256 * \param[in] endh a pointer to a pointer that will point to the string
1257 * starting with the delimiter
1259 * \retval 0 if the string is a valid NID list
1260 * \retval 1 if the string is not a valid NID list
1262 static int lmd_parse_nidlist(char *buf, char **endh)
1271 while (*buf == ',' || *buf == ':')
1273 if (*buf == ' ' || *buf == '/' || *buf == '\0')
1276 if (!lmd_find_delimiter(buf, &endp))
1277 endp = buf + strlen(buf);
1282 if (cfs_parse_nidlist(buf, strlen(buf), &nidlist) <= 0)
1284 cfs_free_nidlist(&nidlist);
1295 * Parse mount line options
1296 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1297 * dev is passed as device=uml1:/lustre by mount.lustre_tgt
1299 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1301 char *s1, *s2, *devname = NULL;
1302 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1309 LCONSOLE_ERROR_MSG(0x162,
1310 "Missing mount data: check /sbin/mount.lustre_tgt is installed.\n");
1314 /* Options should be a string - try to detect old lmd data */
1315 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1316 LCONSOLE_ERROR_MSG(0x163,
1317 "Using an old version of /sbin/mount.lustre. Please install version %s\n",
1318 LUSTRE_VERSION_STRING);
1321 lmd->lmd_magic = LMD_MAGIC;
1323 OBD_ALLOC(lmd->lmd_params, LMD_PARAMS_MAXLEN);
1324 if (lmd->lmd_params == NULL)
1326 lmd->lmd_params[0] = '\0';
1328 /* Set default flags here */
1333 int time_min = OBD_RECOVERY_TIME_MIN;
1336 /* Skip whitespace and extra commas */
1337 while (*s1 == ' ' || *s1 == ',')
1342 * Client options are parsed in ll_options: eg. flock,
1347 * Parse non-ldiskfs options here. Rather than modifying
1348 * ldiskfs, we just zero these out here
1350 if (strncmp(s1, "abort_recov", 11) == 0) {
1351 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1353 } else if (strncmp(s1, "abort_recov_mdt", 15) == 0) {
1354 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV_MDT;
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, "no_precreate", 12) == 0) {
1367 lmd->lmd_flags |= LMD_FLG_NO_PRECREATE;
1369 } else if (strncmp(s1, "noir", 4) == 0) {
1370 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1372 } else if (strncmp(s1, "nosvc", 5) == 0) {
1373 lmd->lmd_flags |= LMD_FLG_NOSVC;
1375 } else if (strncmp(s1, "nomgs", 5) == 0) {
1376 lmd->lmd_flags |= LMD_FLG_NOMGS;
1378 } else if (strncmp(s1, "noscrub", 7) == 0) {
1379 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1381 } else if (strncmp(s1, "skip_lfsck", 10) == 0) {
1382 lmd->lmd_flags |= LMD_FLG_SKIP_LFSCK;
1384 } else if (strncmp(s1, "rdonly_dev", 10) == 0) {
1385 lmd->lmd_flags |= LMD_FLG_DEV_RDONLY;
1387 } else if (strncmp(s1, PARAM_MGSNODE,
1388 sizeof(PARAM_MGSNODE) - 1) == 0) {
1389 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1391 * Assume the next mount opt is the first
1392 * invalid NID we get to.
1394 rc = lmd_parse_mgs(lmd, &s2);
1399 } else if (strncmp(s1, "writeconf", 9) == 0) {
1400 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1402 } else if (strncmp(s1, "update", 6) == 0) {
1403 lmd->lmd_flags |= LMD_FLG_UPDATE;
1405 } else if (strncmp(s1, "virgin", 6) == 0) {
1406 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1408 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1409 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1411 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1412 rc = lmd_parse_mgssec(lmd, s1 + 7);
1416 /* ost exclusion list */
1417 } else if (strncmp(s1, "exclude=", 8) == 0) {
1418 rc = lmd_make_exclusion(lmd, s1 + 7);
1422 } else if (strncmp(s1, "mgs", 3) == 0) {
1424 lmd->lmd_flags |= LMD_FLG_MGS;
1426 } else if (strncmp(s1, "svname=", 7) == 0) {
1427 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1431 } else if (strncmp(s1, "param=", 6) == 0) {
1432 size_t length, params_length;
1435 if (lmd_find_delimiter(s1 + 6, &tail)) {
1436 char *param_str = tail + 1;
1437 int supplementary = 1;
1439 while (lmd_parse_nidlist(param_str,
1443 length = param_str - s1 - supplementary;
1445 length = strlen(s1);
1448 params_length = strlen(lmd->lmd_params);
1449 if (params_length + length + 1 >= LMD_PARAMS_MAXLEN)
1451 strncat(lmd->lmd_params, s1 + 6, length);
1452 lmd->lmd_params[params_length + length] = '\0';
1453 strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN);
1454 s3 = s1 + 6 + length;
1456 } else if (strncmp(s1, "localrecov", 10) == 0) {
1457 lmd->lmd_flags |= LMD_FLG_LOCAL_RECOV;
1459 } else if (strncmp(s1, "osd=", 4) == 0) {
1460 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1466 * Linux 2.4 doesn't pass the device, so we stuck it at
1467 * the end of the options.
1469 else if (strncmp(s1, "device=", 7) == 0) {
1472 * terminate options right before device. device
1473 * must be the last one.
1477 } else if (strncmp(s1, "network=", 8) == 0) {
1478 rc = lmd_parse_network(lmd, s1 + 8);
1482 /* check if LNet dynamic peer discovery is activated */
1483 if (LNetGetPeerDiscoveryStatus()) {
1484 CERROR("LNet Dynamic Peer Discovery is enabled "
1485 "on this node. 'network' mount option "
1486 "cannot be taken into account.\n");
1494 s2 = strchr(s3, ',');
1502 memmove(s1, s2, strlen(s2) + 1);
1508 LCONSOLE_ERROR_MSG(0x164,
1509 "Can't find device name (need mount option 'device=...')\n");
1513 s1 = strstr(devname, ":/");
1516 lmd->lmd_flags |= LMD_FLG_CLIENT;
1517 /* Remove leading /s from fsname */
1518 while (*++s1 == '/')
1521 while (*s2 != '/' && *s2 != '\0')
1523 /* Freed in lustre_free_lsi */
1524 OBD_ALLOC(lmd->lmd_profile, s2 - s1 + 8);
1525 if (!lmd->lmd_profile)
1528 strncat(lmd->lmd_profile, s1, s2 - s1);
1529 strncat(lmd->lmd_profile, "-client", 7);
1532 s2 = s1 + strlen(s1) - 1;
1533 /* Remove padding /s from fileset */
1537 OBD_ALLOC(lmd->lmd_fileset, s2 - s1 + 2);
1538 if (lmd->lmd_fileset == NULL) {
1539 OBD_FREE(lmd->lmd_profile,
1540 strlen(lmd->lmd_profile) + 1);
1543 strncat(lmd->lmd_fileset, s1, s2 - s1 + 1);
1547 if (lmd->lmd_nidnet != NULL) {
1548 /* 'network=' mount option forbidden for server */
1549 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1550 lmd->lmd_nidnet = NULL;
1553 "%s: option 'network=' not allowed for Lustre servers: rc = %d\n",
1559 /* Freed in lustre_free_lsi */
1560 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1563 strncpy(lmd->lmd_dev, devname, strlen(devname)+1);
1565 /* Save mount options */
1566 s1 = options + strlen(options) - 1;
1567 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1569 while (*options && (*options == ',' || *options == ' '))
1571 if (*options != 0) {
1572 /* Freed in lustre_free_lsi */
1573 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1576 strncpy(lmd->lmd_opts, options, strlen(options)+1);
1580 lmd->lmd_magic = LMD_MAGIC;
1585 CERROR("Bad mount options %s\n", options);
1590 * This is the entry point for the mount call into Lustre.
1591 * This is called when a server or client is mounted,
1592 * and this is where we start setting things up.
1593 * @param data Mount options (e.g. -o flock,abort_recov)
1595 static int lustre_fill_super(struct super_block *sb, void *lmd2_data,
1598 struct lustre_mount_data *lmd;
1599 struct lustre_sb_info *lsi;
1604 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1606 lsi = lustre_init_lsi(sb);
1612 * Disable lockdep during mount, because mount locking patterns are
1618 * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
1620 obd_zombie_barrier();
1622 /* Figure out the lmd from the mount options */
1623 if (lmd_parse(lmd2_data, lmd)) {
1625 GOTO(out, rc = -EINVAL);
1628 if (lmd_is_client(lmd)) {
1629 bool have_client = false;
1631 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1632 if (!client_fill_super)
1633 request_module("lustre");
1634 spin_lock(&client_lock);
1635 if (client_fill_super && try_module_get(client_mod))
1637 spin_unlock(&client_lock);
1639 LCONSOLE_ERROR_MSG(0x165,
1640 "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
1644 rc = lustre_start_mgc(sb);
1646 lustre_common_put_super(sb);
1649 /* Connect and start */
1650 /* (should always be ll_fill_super) */
1651 rc = (*client_fill_super)(sb);
1652 /* c_f_s will call lustre_common_put_super on failure,
1653 * which takes care of the module reference.
1657 #ifdef HAVE_SERVER_SUPPORT
1658 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1659 rc = server_fill_super(sb);
1661 * s_f_s calls lustre_start_mgc after the mount because we need
1662 * the MGS NIDs which are stored on disk. Plus, we may
1663 * need to start the MGS first.
1665 /* s_f_s will call server_put_super on failure */
1667 CERROR("client-side-only module, cannot handle server mount\n");
1673 * If error happens in fill_super() call, @lsi will be killed there.
1674 * This is why we do not put it here.
1679 CERROR("Unable to mount %s (%d)\n",
1680 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1682 CDEBUG(D_SUPER, "Mount %s complete\n",
1691 * We can't call ll_fill_super by name because it lives in a module that
1692 * must be loaded after this one.
1694 void lustre_register_super_ops(struct module *mod,
1695 int (*cfs)(struct super_block *sb),
1696 void (*ksc)(struct super_block *sb))
1698 spin_lock(&client_lock);
1700 client_fill_super = cfs;
1701 kill_super_cb = ksc;
1702 spin_unlock(&client_lock);
1704 EXPORT_SYMBOL(lustre_register_super_ops);
1706 /***************** FS registration ******************/
1707 static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1708 const char *devname, void *data)
1710 return mount_nodev(fs_type, flags, data, lustre_fill_super);
1713 static void lustre_kill_super(struct super_block *sb)
1715 struct lustre_sb_info *lsi = s2lsi(sb);
1717 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1718 (*kill_super_cb)(sb);
1720 kill_anon_super(sb);
1723 #ifdef HAVE_SERVER_SUPPORT
1724 /* Register the "lustre_tgt" fs type.
1726 * Right now this isn't any different than the normal "lustre" filesystem
1727 * type, but it is added so that there is some compatibility to allow
1728 * changing documentation and scripts to start using the "lustre_tgt" type
1729 * at mount time. That will simplify test interop, and in case of upgrades
1730 * that change to the new type and then need to roll back for some reason.
1732 * The long-term goal is to disentangle the client and server mount code.
1734 static struct file_system_type lustre_fs_type_tgt = {
1735 .owner = THIS_MODULE,
1736 .name = "lustre_tgt",
1737 .mount = lustre_mount,
1738 .kill_sb = lustre_kill_super,
1739 .fs_flags = FS_REQUIRES_DEV | FS_RENAME_DOES_D_MOVE,
1741 MODULE_ALIAS_FS("lustre_tgt");
1743 #define register_filesystem_tgt(fstype) \
1747 _rc = register_filesystem(fstype); \
1748 if (_rc && _rc != -EBUSY) { \
1749 /* Don't fail if server code also registers "lustre_tgt" */ \
1750 CERROR("obdclass: register fstype '%s' failed: rc = %d\n", \
1751 (fstype)->name, _rc); \
1755 #define unregister_filesystem_tgt(fstype) unregister_filesystem(fstype)
1757 #define register_filesystem_tgt(fstype) do {} while (0)
1758 #define unregister_filesystem_tgt(fstype) do {} while (0)
1761 /* Register the "lustre" fs type */
1762 static struct file_system_type lustre_fs_type = {
1763 .owner = THIS_MODULE,
1765 .mount = lustre_mount,
1766 .kill_sb = lustre_kill_super,
1767 .fs_flags = FS_RENAME_DOES_D_MOVE,
1769 MODULE_ALIAS_FS("lustre");
1771 int lustre_register_fs(void)
1773 register_filesystem_tgt(&lustre_fs_type_tgt);
1775 return register_filesystem(&lustre_fs_type);
1778 int lustre_unregister_fs(void)
1780 unregister_filesystem_tgt(&lustre_fs_type_tgt);
1782 return unregister_filesystem(&lustre_fs_type);