4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lustre/obdclass/obd_mount.c
33 * Client mount routines
35 * Author: Nathan Rutman <nathan@clusterfs.com>
39 #define DEBUG_SUBSYSTEM S_CLASS
40 #define D_MOUNT (D_SUPER|D_CONFIG/*|D_WARNING */)
41 #define PRINT_CMD CDEBUG
44 #include <obd_class.h>
45 #include <linux/random.h>
46 #include <libcfs/linux/linux-uuid.h>
47 #include <linux/version.h>
48 #include <lustre_log.h>
49 #include <lustre_disk.h>
50 #include <uapi/linux/lustre/lustre_param.h>
51 #include <lustre_crypto.h>
53 /**************** config llog ********************/
56 * Get a config log from the MGS and process it.
57 * This func is called for both clients and servers.
58 * Continue to process new statements appended to the logs
59 * (whenever the config lock is revoked) until lustre_end_log
62 * @param sb The superblock is used by the MGC to write to the local copy of
64 * @param logname The name of the llog to replicate from the MGS
65 * @param cfg Since the same MGC may be used to follow multiple config logs
66 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
67 * this log, and is added to the mgc's list of logs to follow.
69 int lustre_process_log(struct super_block *sb, char *logname,
70 struct config_llog_instance *cfg)
72 struct lustre_cfg *lcfg;
73 struct lustre_cfg_bufs *bufs;
74 struct lustre_sb_info *lsi = s2lsi(sb);
75 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,
104 "%s: Configuration from log %s failed from MGS %d. Check client and MGS are on compatible version.\n",
105 mgc->obd_name, logname, rc);
107 LCONSOLE_ERROR_MSG(0x15c,
108 "%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",
109 mgc->obd_name, logname, rc);
111 /* class_obd_list(); */
114 EXPORT_SYMBOL(lustre_process_log);
116 /* Stop watching this config log for updates */
117 int lustre_end_log(struct super_block *sb, char *logname,
118 struct config_llog_instance *cfg)
120 struct lustre_cfg *lcfg;
121 struct lustre_cfg_bufs bufs;
122 struct lustre_sb_info *lsi = s2lsi(sb);
123 struct obd_device *mgc = lsi->lsi_mgc;
131 /* mgc_process_config */
132 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
133 lustre_cfg_bufs_set_string(&bufs, 1, logname);
135 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
136 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
139 lustre_cfg_init(lcfg, LCFG_LOG_END, &bufs);
140 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
141 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
144 EXPORT_SYMBOL(lustre_end_log);
146 /**************** OBD start *******************/
149 * lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
150 * lctl (and do for echo cli/srv.
152 static int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
153 char *s1, char *s2, char *s3, char *s4)
155 struct lustre_cfg_bufs bufs;
156 struct lustre_cfg *lcfg = NULL;
159 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
160 cmd, s1, s2, s3, s4);
162 lustre_cfg_bufs_reset(&bufs, cfgname);
164 lustre_cfg_bufs_set_string(&bufs, 1, s1);
166 lustre_cfg_bufs_set_string(&bufs, 2, s2);
168 lustre_cfg_bufs_set_string(&bufs, 3, s3);
170 lustre_cfg_bufs_set_string(&bufs, 4, s4);
172 OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
175 lustre_cfg_init(lcfg, cmd, &bufs);
176 lcfg->lcfg_nid = nid;
177 rc = class_process_config(lcfg);
178 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
183 * Call class_attach and class_setup. These methods in turn call
184 * OBD type-specific methods.
186 int lustre_start_simple(char *obdname, char *type, char *uuid,
187 char *s1, char *s2, char *s3, char *s4)
191 CDEBUG(D_MOUNT, "Starting OBD %s (typ=%s)\n", obdname, type);
193 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
195 CERROR("%s attach error %d\n", obdname, rc);
198 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
200 CERROR("%s setup error %d\n", obdname, rc);
201 do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
206 static DEFINE_MUTEX(mgc_start_lock);
209 * Set up a MGC OBD to process startup logs
211 * \param sb [in] super block of the MGC OBD
213 * \retval 0 success, otherwise error code
215 int lustre_start_mgc(struct super_block *sb)
217 struct obd_connect_data *data = NULL;
218 struct lustre_sb_info *lsi = s2lsi(sb);
219 struct obd_device *obd;
220 struct obd_export *exp;
221 struct obd_uuid *uuid = NULL;
224 char nidstr[LNET_NIDSTR_SIZE];
225 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
227 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_processid id;
244 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
245 if (nid_is_lo0(&id.nid))
247 nid = lnet_nid_to_nid4(&id.nid);
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 "Mounting client with IR setting not compatible with current MGC. Using MGC setting that is IR %s",
307 has_ir ? "enabled" : "disabled");
309 *flags &= ~LMD_FLG_NOIR;
311 *flags |= LMD_FLG_NOIR;
317 * If we are restarting the MGS, don't try to keep the MGC's
318 * old connection, or registration will fail.
321 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.
332 CDEBUG(D_MOUNT, "%s:Set MGC reconnect %d\n", mgcname, recov_bk);
333 rc = obd_set_info_async(NULL, obd->obd_self_export,
334 sizeof(KEY_INIT_RECOV_BACKUP),
335 KEY_INIT_RECOV_BACKUP,
336 sizeof(recov_bk), &recov_bk, NULL);
340 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
342 /* Add the primary NIDs for the MGS */
344 snprintf(niduuid, len + 2, "%s_%x", mgcname, i);
345 if (IS_SERVER(lsi)) {
346 ptr = lsi->lsi_lmd->lmd_mgs;
347 CDEBUG(D_MOUNT, "mgs NIDs %s.\n", ptr);
349 /* Use local NIDs (including LO) */
350 struct lnet_processid id;
352 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
353 rc = do_lcfg(mgcname, lnet_nid_to_nid4(&id.nid),
355 niduuid, NULL, NULL, NULL);
358 /* Use mgsnode= nids */
359 /* mount -o mgsnode=nid */
360 if (lsi->lsi_lmd->lmd_mgs) {
361 ptr = lsi->lsi_lmd->lmd_mgs;
362 } else if (class_find_param(ptr, PARAM_MGSNODE,
364 CERROR("No MGS NIDs given.\n");
365 GOTO(out_free, rc = -EINVAL);
368 * Add primary MGS NID(s).
369 * Multiple NIDs on one MGS node are separated
372 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
373 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
374 niduuid, NULL, NULL, NULL);
377 /* Stop at the first failover NID */
382 } else { /* client */
383 /* Use NIDs from mount line: uml1,1@elan:uml2,2@elan:/lustre */
384 ptr = lsi->lsi_lmd->lmd_dev;
385 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
386 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
387 niduuid, NULL, NULL, NULL);
390 /* Stop at the first failover NID */
396 CERROR("No valid MGS NIDs found.\n");
397 GOTO(out_free, rc = -EINVAL);
399 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
401 /* Random uuid for MGC allows easier reconnects */
404 GOTO(out_free, rc = -ENOMEM);
406 generate_random_uuid(uuidc.b);
407 snprintf(uuid->uuid, sizeof(*uuid), "%pU", uuidc.b);
410 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
411 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
412 niduuid, NULL, NULL);
416 /* Add any failover MGS NIDs */
418 while (ptr && ((*ptr == ':' ||
419 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
420 /* New failover node */
421 sprintf(niduuid, "%s_%x", mgcname, i);
423 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
424 rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID,
425 niduuid, NULL, NULL, NULL);
432 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
433 niduuid, NULL, NULL, NULL);
441 lsi->lsi_lmd->lmd_mgs_failnodes = i;
443 obd = class_name2obd(mgcname);
445 CERROR("Can't find mgcobd %s\n", mgcname);
446 GOTO(out_free, rc = -ENOTCONN);
449 rc = obd_set_info_async(NULL, obd->obd_self_export,
450 strlen(KEY_MGSSEC), KEY_MGSSEC,
451 strlen(mgssec), mgssec, NULL);
456 * Keep a refcount of servers/clients who started with "mount",
457 * so we know when we can get rid of the mgc.
459 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
461 /* We connect to the MGS at setup, and don't disconnect until cleanup */
462 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
463 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
464 OBD_CONNECT_LVB_TYPE |
465 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_BARRIER |
467 data->ocd_connect_flags2 = OBD_CONNECT2_REP_MBITS;
469 if (lmd_is_client(lsi->lsi_lmd) &&
470 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
471 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
472 data->ocd_version = LUSTRE_VERSION_CODE;
473 rc = obd_connect(NULL, &exp, obd, uuid, data, NULL);
475 CERROR("connect failed %d\n", rc);
479 obd->u.cli.cl_mgc_mgsexp = exp;
483 * Keep the MGC info in the sb. Note that many lsi's can point
488 mutex_unlock(&mgc_start_lock);
495 OBD_FREE(mgcname, len);
497 OBD_FREE(niduuid, len + 2);
500 EXPORT_SYMBOL(lustre_start_mgc);
502 static int lustre_stop_mgc(struct super_block *sb)
504 struct lustre_sb_info *lsi = s2lsi(sb);
505 struct obd_device *obd;
506 char niduuid[MAX_OBD_NAME + 6], *ptr = NULL;
518 mutex_lock(&mgc_start_lock);
519 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
520 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
522 * This is not fatal, every client that stops
525 CDEBUG(D_MOUNT, "MGC still has %d references.\n",
526 atomic_read(&obd->u.cli.cl_mgc_refcount));
527 GOTO(out, rc = -EBUSY);
531 * The MGC has no recoverable data in any case.
532 * force shotdown set in umount_begin
534 obd->obd_no_recov = 1;
536 if (obd->u.cli.cl_mgc_mgsexp) {
538 * An error is not fatal, if we are unable to send the
539 * disconnect mgs ping evictor cleans up the export
541 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
543 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
547 * Cache the obdname for cleaning the nid uuids, which are
548 * obdname_XX before calling class_manual_cleanup
550 strcpy(niduuid, obd->obd_name);
551 ptr = niduuid + strlen(niduuid);
553 rc = class_manual_cleanup(obd);
557 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
558 sprintf(ptr, "_%x", i);
559 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
560 niduuid, NULL, NULL, NULL);
562 CERROR("del MDC UUID %s failed: rc = %d\n",
566 /* class_import_put will get rid of the additional connections */
567 mutex_unlock(&mgc_start_lock);
571 /***************** lustre superblock **************/
573 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
575 struct lustre_sb_info *lsi;
582 OBD_ALLOC_PTR(lsi->lsi_lmd);
588 s2lsi_nocast(sb) = lsi;
589 /* we take 1 extra ref for our setup */
590 atomic_set(&lsi->lsi_mounts, 1);
592 /* Default umount style */
593 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
594 INIT_LIST_HEAD(&lsi->lsi_lwp_list);
595 mutex_init(&lsi->lsi_lwp_mutex);
599 EXPORT_SYMBOL(lustre_init_lsi);
601 static int lustre_free_lsi(struct super_block *sb)
603 struct lustre_sb_info *lsi = s2lsi(sb);
607 LASSERT(lsi != NULL);
608 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
610 /* someone didn't call server_put_mount. */
611 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
614 if (lsi->lsi_lmd != NULL) {
615 if (lsi->lsi_lmd->lmd_dev != NULL)
616 OBD_FREE(lsi->lsi_lmd->lmd_dev,
617 strlen(lsi->lsi_lmd->lmd_dev) + 1);
618 if (lsi->lsi_lmd->lmd_profile != NULL)
619 OBD_FREE(lsi->lsi_lmd->lmd_profile,
620 strlen(lsi->lsi_lmd->lmd_profile) + 1);
621 if (lsi->lsi_lmd->lmd_fileset != NULL)
622 OBD_FREE(lsi->lsi_lmd->lmd_fileset,
623 strlen(lsi->lsi_lmd->lmd_fileset) + 1);
624 if (lsi->lsi_lmd->lmd_mgssec != NULL)
625 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
626 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
627 if (lsi->lsi_lmd->lmd_opts != NULL)
628 OBD_FREE(lsi->lsi_lmd->lmd_opts,
629 strlen(lsi->lsi_lmd->lmd_opts) + 1);
630 if (lsi->lsi_lmd->lmd_exclude_count)
631 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
632 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
633 lsi->lsi_lmd->lmd_exclude_count);
634 if (lsi->lsi_lmd->lmd_mgs != NULL)
635 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
636 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
637 if (lsi->lsi_lmd->lmd_osd_type != NULL)
638 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
639 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
640 if (lsi->lsi_lmd->lmd_params != NULL)
641 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
642 if (lsi->lsi_lmd->lmd_nidnet != NULL)
643 OBD_FREE(lsi->lsi_lmd->lmd_nidnet,
644 strlen(lsi->lsi_lmd->lmd_nidnet) + 1);
646 OBD_FREE_PTR(lsi->lsi_lmd);
649 LASSERT(lsi->lsi_llsbi == NULL);
651 s2lsi_nocast(sb) = NULL;
657 * The lsi has one reference for every server that is using the disk -
658 * e.g. MDT, MGS, and potentially MGC
660 int lustre_put_lsi(struct super_block *sb)
662 struct lustre_sb_info *lsi = s2lsi(sb);
666 LASSERT(lsi != NULL);
668 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
669 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
670 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
671 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
672 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
673 lsi->lsi_dt_dev = NULL;
674 obd_disconnect(lsi->lsi_osd_exp);
675 /* wait till OSD is gone */
676 obd_zombie_barrier();
683 EXPORT_SYMBOL(lustre_put_lsi);
686 * The goal of this function is to extract the file system name
687 * from the OBD name. This can come in two flavors. One is
688 * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
689 * number. In both cases we should return fsname. If it is
690 * not a valid OBD name it is assumed to be the file system
693 void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
700 * First we have to see if the @tgt has '-' at all. It is
701 * valid for the user to request something like
702 * lctl set_param -P llite.lustre*.xattr_cache=0
704 ptr = strrchr(tgt, '-');
706 /* No '-' means it could end in '*' */
707 ptr = strchr(tgt, '*');
709 /* No '*' either. Assume tgt = fsname */
717 /* tgt format fsname-MDT0000-* */
718 if ((!strncmp(ptr, "-MDT", 4) ||
719 !strncmp(ptr, "-OST", 4)) &&
720 (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
721 isxdigit(ptr[6]) && isxdigit(ptr[7]))) {
727 * tgt_format fsname-cli'dev'-'uuid' except for the llite case
728 * which are named fsname-'uuid'. Examples:
730 * lustre-clilov-ffff88104db5b800
731 * lustre-ffff88104db5b800 (for llite device)
733 * The length of the OBD uuid can vary on different platforms.
734 * This test if any invalid characters are in string. Allow
735 * wildcards with '*' character.
738 if (!strspn(ptr, "0123456789abcdefABCDEF*")) {
744 * Now that we validated the device name lets extract the
745 * file system name. Most of the names in this class will
746 * have '-cli' in its name which needs to be dropped. If
747 * it doesn't have '-cli' then its a llite device which
748 * ptr already points to the start of the uuid string.
750 tmp = strstr(tgt, "-cli");
757 len = min_t(size_t, len, LUSTRE_MAXFSNAME);
758 snprintf(fsname, buflen, "%.*s", (int)len, tgt);
762 EXPORT_SYMBOL(obdname2fsname);
766 * <FSNAME><SEPARATOR><TYPE><INDEX>
767 * FSNAME is between 1 and 8 characters (inclusive).
768 * Excluded characters are '/' and ':'
769 * SEPARATOR is either ':' or '-'
770 * TYPE: "OST", "MDT", etc.
771 * INDEX: Hex representation of the index
775 * Get the fsname ("lustre") from the server name ("lustre-OST003F").
776 * @param [in] svname server name including type and index
777 * @param [out] fsname Buffer to copy filesystem name prefix into.
778 * Must have at least 'strlen(fsname) + 1' chars.
779 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
782 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
786 dash = svname + strnlen(svname, LUSTRE_MAXFSNAME);
787 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
792 if (fsname != NULL) {
793 strncpy(fsname, svname, dash - svname);
794 fsname[dash - svname] = '\0';
802 EXPORT_SYMBOL(server_name2fsname);
805 * Get service name (svname) from string
807 * if endptr isn't NULL it is set to end of fsname *
809 int server_name2svname(const char *label, char *svname, const char **endptr,
815 /* We use server_name2fsname() just for parsing */
816 rc = server_name2fsname(label, NULL, &dash);
823 if (strlcpy(svname, dash + 1, svsize) >= svsize)
828 EXPORT_SYMBOL(server_name2svname);
831 * check server name is OST.
833 int server_name_is_ost(const char *svname)
838 /* We use server_name2fsname() just for parsing */
839 rc = server_name2fsname(svname, NULL, &dash);
845 if (strncmp(dash, "OST", 3) == 0)
849 EXPORT_SYMBOL(server_name_is_ost);
852 * Get the index from the target name MDTXXXX/OSTXXXX
853 * rc = server type, or rc < 0 on error
855 int target_name2index(const char *tgtname, __u32 *idx, const char **endptr)
857 const char *dash = tgtname;
861 if (strncmp(dash, "MDT", 3) == 0)
862 rc = LDD_F_SV_TYPE_MDT;
863 else if (strncmp(dash, "OST", 3) == 0)
864 rc = LDD_F_SV_TYPE_OST;
870 if (strncmp(dash, "all", 3) == 0) {
873 return rc | LDD_F_SV_ALL;
876 index = simple_strtoul(dash, (char **)endptr, 16);
885 EXPORT_SYMBOL(target_name2index);
888 * Get the index from the OBD name.
889 * rc = server type, or
891 * if endptr isn't NULL it is set to end of name
893 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
898 /* We use server_name2fsname() just for parsing */
899 rc = server_name2fsname(svname, NULL, &dash);
904 rc = target_name2index(dash, idx, endptr);
908 /* Account for -mdc after index that is possible when specifying mdt */
909 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
910 sizeof(LUSTRE_MDC_NAME)-1) == 0)
911 *endptr += sizeof(LUSTRE_MDC_NAME);
915 EXPORT_SYMBOL(server_name2index);
917 /*************** mount common betweeen server and client ***************/
920 int lustre_common_put_super(struct super_block *sb)
926 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
928 /* Drop a ref to the MGC */
929 rc = lustre_stop_mgc(sb);
930 if (rc && (rc != -ENOENT)) {
932 CERROR("Can't stop MGC: %d\n", rc);
936 * BUSY just means that there's some other OBD that
937 * needs the mgc. Let him clean it up.
939 CDEBUG(D_MOUNT, "MGC still in use\n");
941 /* Drop a ref to the mounted disk */
946 EXPORT_SYMBOL(lustre_common_put_super);
948 static void lmd_print(struct lustre_mount_data *lmd)
952 PRINT_CMD(D_MOUNT, " mount data:\n");
953 if (lmd_is_client(lmd))
954 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
955 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
956 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
959 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
961 if (lmd->lmd_recovery_time_soft)
962 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
963 lmd->lmd_recovery_time_soft);
965 if (lmd->lmd_recovery_time_hard)
966 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
967 lmd->lmd_recovery_time_hard);
969 for (i = 0; i < lmd->lmd_exclude_count; i++) {
970 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
971 lmd->lmd_exclude[i]);
975 /* Is this server on the exclusion list */
976 int lustre_check_exclusion(struct super_block *sb, char *svname)
978 struct lustre_sb_info *lsi = s2lsi(sb);
979 struct lustre_mount_data *lmd = lsi->lsi_lmd;
985 rc = server_name2index(svname, &index, NULL);
986 if (rc != LDD_F_SV_TYPE_OST)
987 /* Only exclude OSTs */
990 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
991 index, lmd->lmd_exclude_count, lmd->lmd_dev);
993 for (i = 0; i < lmd->lmd_exclude_count; i++) {
994 if (index == lmd->lmd_exclude[i]) {
995 CWARN("Excluding %s (on exclusion list)\n", svname);
1002 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1003 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
1005 const char *s1 = ptr, *s2;
1006 __u32 *exclude_list;
1013 * The shortest an ost name can be is 8 chars: -OST0000.
1014 * We don't actually know the fsname at this time, so in fact
1015 * a user could specify any fsname.
1017 devmax = strlen(ptr) / 8 + 1;
1019 /* temp storage until we figure out how many we have */
1020 OBD_ALLOC_PTR_ARRAY(exclude_list, devmax);
1024 /* we enter this fn pointing at the '=' */
1025 while (*s1 && *s1 != ' ' && *s1 != ',') {
1027 rc = server_name2index(s1, &index, &s2);
1029 CERROR("Can't parse server name '%s': rc = %d\n",
1033 if (rc == LDD_F_SV_TYPE_OST)
1034 exclude_list[lmd->lmd_exclude_count++] = index;
1036 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
1037 (uint)(s2-s1), s1, rc);
1040 * now we are pointing at ':' (next exclude)
1041 * or ',' (end of excludes)
1043 if (lmd->lmd_exclude_count >= devmax)
1046 if (rc >= 0) /* non-err */
1049 if (lmd->lmd_exclude_count) {
1050 /* permanent, freed in lustre_free_lsi */
1051 OBD_ALLOC_PTR_ARRAY(lmd->lmd_exclude,
1052 lmd->lmd_exclude_count);
1053 if (lmd->lmd_exclude) {
1054 memcpy(lmd->lmd_exclude, exclude_list,
1055 sizeof(index) * lmd->lmd_exclude_count);
1058 lmd->lmd_exclude_count = 0;
1061 OBD_FREE_PTR_ARRAY(exclude_list, devmax);
1065 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1070 if (lmd->lmd_mgssec != NULL) {
1071 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1072 lmd->lmd_mgssec = NULL;
1075 tail = strchr(ptr, ',');
1077 length = strlen(ptr);
1079 length = tail - ptr;
1081 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1082 if (lmd->lmd_mgssec == NULL)
1085 memcpy(lmd->lmd_mgssec, ptr, length);
1086 lmd->lmd_mgssec[length] = '\0';
1090 static int lmd_parse_network(struct lustre_mount_data *lmd, char *ptr)
1095 if (lmd->lmd_nidnet != NULL) {
1096 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1097 lmd->lmd_nidnet = NULL;
1100 tail = strchr(ptr, ',');
1102 length = strlen(ptr);
1104 length = tail - ptr;
1106 OBD_ALLOC(lmd->lmd_nidnet, length + 1);
1107 if (lmd->lmd_nidnet == NULL)
1110 memcpy(lmd->lmd_nidnet, ptr, length);
1111 lmd->lmd_nidnet[length] = '\0';
1115 static int lmd_parse_string(char **handle, char *ptr)
1120 if ((handle == NULL) || (ptr == NULL))
1123 if (*handle != NULL) {
1124 OBD_FREE(*handle, strlen(*handle) + 1);
1128 tail = strchr(ptr, ',');
1130 length = strlen(ptr);
1132 length = tail - ptr;
1134 OBD_ALLOC(*handle, length + 1);
1135 if (*handle == NULL)
1138 memcpy(*handle, ptr, length);
1139 (*handle)[length] = '\0';
1144 /* Collect multiple values for mgsnid specifiers */
1145 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
1153 /* Find end of NID-list */
1154 while (class_parse_nid_quiet(tail, &nid, &tail) == 0)
1157 length = tail - *ptr;
1159 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
1163 if (lmd->lmd_mgs != NULL)
1164 oldlen = strlen(lmd->lmd_mgs) + 1;
1166 OBD_ALLOC(mgsnid, oldlen + length + 1);
1170 if (lmd->lmd_mgs != NULL) {
1171 /* Multiple mgsnid= are taken to mean failover locations */
1172 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
1173 mgsnid[oldlen - 1] = ':';
1174 OBD_FREE(lmd->lmd_mgs, oldlen);
1176 memcpy(mgsnid + oldlen, *ptr, length);
1177 mgsnid[oldlen + length] = '\0';
1178 lmd->lmd_mgs = mgsnid;
1185 * Find the first delimiter (comma or colon) from the specified \a buf and
1186 * make \a *endh point to the string starting with the delimiter. The commas
1187 * in expression list [...] will be skipped.
1189 * @buf a delimiter-separated string
1190 * @endh a pointer to a pointer that will point to the string
1191 * starting with the delimiter
1193 * RETURNS true if delimiter is found, false if delimiter is not found
1195 static bool lmd_find_delimiter(char *buf, char **endh)
1204 if (*c == ',' || *c == ':')
1207 pos = strcspn(c, "[:,]");
1211 /* Not a valid mount string */
1213 CWARN("invalid mount string format\n");
1221 /* invalid mount string */
1223 CWARN("invalid mount string format\n");
1238 * Find the first valid string delimited by comma or colon from the specified
1239 * \a buf and parse it to see whether it's a valid NID list. If yes, \a *endh
1240 * will point to the next string starting with the delimiter.
1242 * \param[in] buf a delimiter-separated string
1243 * \param[in] endh a pointer to a pointer that will point to the string
1244 * starting with the delimiter
1246 * \retval 0 if the string is a valid NID list
1247 * \retval 1 if the string is not a valid NID list
1249 static int lmd_parse_nidlist(char *buf, char **endh)
1258 while (*buf == ',' || *buf == ':')
1260 if (*buf == ' ' || *buf == '/' || *buf == '\0')
1263 if (!lmd_find_delimiter(buf, &endp))
1264 endp = buf + strlen(buf);
1269 if (cfs_parse_nidlist(buf, strlen(buf), &nidlist) <= 0)
1271 cfs_free_nidlist(&nidlist);
1282 * Parse mount line options
1283 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1284 * dev is passed as device=uml1:/lustre by mount.lustre_tgt
1286 int lmd_parse(char *options, struct lustre_mount_data *lmd)
1288 char *s1, *s2, *devname = NULL;
1289 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1296 LCONSOLE_ERROR_MSG(0x162,
1297 "Missing mount data: check /sbin/mount.lustre_tgt is installed.\n");
1301 /* Options should be a string - try to detect old lmd data */
1302 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1303 LCONSOLE_ERROR_MSG(0x163,
1304 "Using an old version of /sbin/mount.lustre. Please install version %s\n",
1305 LUSTRE_VERSION_STRING);
1308 lmd->lmd_magic = LMD_MAGIC;
1310 OBD_ALLOC(lmd->lmd_params, LMD_PARAMS_MAXLEN);
1311 if (lmd->lmd_params == NULL)
1313 lmd->lmd_params[0] = '\0';
1315 /* Set default flags here */
1320 int time_min = OBD_RECOVERY_TIME_MIN;
1323 /* Skip whitespace and extra commas */
1324 while (*s1 == ' ' || *s1 == ',')
1329 * Client options are parsed in ll_options: eg. flock,
1334 * Parse non-ldiskfs options here. Rather than modifying
1335 * ldiskfs, we just zero these out here
1337 if (strncmp(s1, "abort_recov", 11) == 0) {
1338 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1340 } else if (strncmp(s1, "abort_recov_mdt", 15) == 0) {
1341 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV_MDT;
1343 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1344 lmd->lmd_recovery_time_soft =
1345 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1348 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1349 lmd->lmd_recovery_time_hard =
1350 max_t(int, simple_strtoul(s1 + 19, NULL, 10),
1353 } else if (strncmp(s1, "no_precreate", 12) == 0) {
1354 lmd->lmd_flags |= LMD_FLG_NO_PRECREATE;
1356 } else if (strncmp(s1, "noir", 4) == 0) {
1357 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1359 } else if (strncmp(s1, "nosvc", 5) == 0) {
1360 lmd->lmd_flags |= LMD_FLG_NOSVC;
1362 } else if (strncmp(s1, "nomgs", 5) == 0) {
1363 lmd->lmd_flags |= LMD_FLG_NOMGS;
1365 } else if (strncmp(s1, "noscrub", 7) == 0) {
1366 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1368 } else if (strncmp(s1, "skip_lfsck", 10) == 0) {
1369 lmd->lmd_flags |= LMD_FLG_SKIP_LFSCK;
1371 } else if (strncmp(s1, "rdonly_dev", 10) == 0) {
1372 lmd->lmd_flags |= LMD_FLG_DEV_RDONLY;
1374 } else if (strncmp(s1, PARAM_MGSNODE,
1375 sizeof(PARAM_MGSNODE) - 1) == 0) {
1376 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1378 * Assume the next mount opt is the first
1379 * invalid NID we get to.
1381 rc = lmd_parse_mgs(lmd, &s2);
1386 } else if (strncmp(s1, "writeconf", 9) == 0) {
1387 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1389 } else if (strncmp(s1, "nolocallogs", 11) == 0) {
1390 lmd->lmd_flags |= LMD_FLG_NO_LOCAL_LOGS;
1392 } else if (strncmp(s1, "update", 6) == 0) {
1393 lmd->lmd_flags |= LMD_FLG_UPDATE;
1395 } else if (strncmp(s1, "virgin", 6) == 0) {
1396 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1398 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1399 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1401 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1402 rc = lmd_parse_mgssec(lmd, s1 + 7);
1406 /* ost exclusion list */
1407 } else if (strncmp(s1, "exclude=", 8) == 0) {
1408 rc = lmd_make_exclusion(lmd, s1 + 7);
1412 } else if (strncmp(s1, "mgs", 3) == 0) {
1414 lmd->lmd_flags |= LMD_FLG_MGS;
1416 } else if (strncmp(s1, "svname=", 7) == 0) {
1417 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1421 } else if (strncmp(s1, "param=", 6) == 0) {
1422 size_t length, params_length;
1425 if (lmd_find_delimiter(s1 + 6, &tail)) {
1426 char *param_str = tail + 1;
1427 int supplementary = 1;
1429 while (lmd_parse_nidlist(param_str,
1433 length = param_str - s1 - supplementary;
1435 length = strlen(s1);
1438 params_length = strlen(lmd->lmd_params);
1439 if (params_length + length + 1 >= LMD_PARAMS_MAXLEN)
1441 strncat(lmd->lmd_params, s1 + 6, length);
1442 lmd->lmd_params[params_length + length] = '\0';
1443 strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN);
1444 s3 = s1 + 6 + length;
1446 } else if (strncmp(s1, "localrecov", 10) == 0) {
1447 lmd->lmd_flags |= LMD_FLG_LOCAL_RECOV;
1449 } else if (strncmp(s1, "osd=", 4) == 0) {
1450 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1456 * Linux 2.4 doesn't pass the device, so we stuck it at
1457 * the end of the options.
1459 else if (strncmp(s1, "device=", 7) == 0) {
1462 * terminate options right before device. device
1463 * must be the last one.
1467 } else if (strncmp(s1, "network=", 8) == 0) {
1468 rc = lmd_parse_network(lmd, s1 + 8);
1472 /* check if LNet dynamic peer discovery is activated */
1473 if (LNetGetPeerDiscoveryStatus()) {
1474 CERROR("LNet Dynamic Peer Discovery is enabled "
1475 "on this node. 'network' mount option "
1476 "cannot be taken into account.\n");
1484 s2 = strchr(s3, ',');
1492 memmove(s1, s2, strlen(s2) + 1);
1498 LCONSOLE_ERROR_MSG(0x164,
1499 "Can't find device name (need mount option 'device=...')\n");
1503 s1 = strstr(devname, ":/");
1506 lmd->lmd_flags |= LMD_FLG_CLIENT;
1507 /* Remove leading /s from fsname */
1508 while (*++s1 == '/')
1511 while (*s2 != '/' && *s2 != '\0')
1513 /* Freed in lustre_free_lsi */
1514 OBD_ALLOC(lmd->lmd_profile, s2 - s1 + 8);
1515 if (!lmd->lmd_profile)
1518 strncat(lmd->lmd_profile, s1, s2 - s1);
1519 strncat(lmd->lmd_profile, "-client", 7);
1522 s2 = s1 + strlen(s1) - 1;
1523 /* Remove padding /s from fileset */
1527 OBD_ALLOC(lmd->lmd_fileset, s2 - s1 + 2);
1528 if (lmd->lmd_fileset == NULL) {
1529 OBD_FREE(lmd->lmd_profile,
1530 strlen(lmd->lmd_profile) + 1);
1533 strncat(lmd->lmd_fileset, s1, s2 - s1 + 1);
1537 if (lmd->lmd_nidnet != NULL) {
1538 /* 'network=' mount option forbidden for server */
1539 OBD_FREE(lmd->lmd_nidnet, strlen(lmd->lmd_nidnet) + 1);
1540 lmd->lmd_nidnet = NULL;
1543 "%s: option 'network=' not allowed for Lustre servers: rc = %d\n",
1549 /* Freed in lustre_free_lsi */
1550 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1553 strncpy(lmd->lmd_dev, devname, strlen(devname)+1);
1555 /* Save mount options */
1556 s1 = options + strlen(options) - 1;
1557 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1559 while (*options && (*options == ',' || *options == ' '))
1561 if (*options != 0) {
1562 /* Freed in lustre_free_lsi */
1563 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1566 strncpy(lmd->lmd_opts, options, strlen(options)+1);
1570 lmd->lmd_magic = LMD_MAGIC;
1575 CERROR("Bad mount options %s\n", options);
1578 EXPORT_SYMBOL(lmd_parse);
1580 #ifdef HAVE_SERVER_SUPPORT
1582 * This is the entry point for the mount call into Lustre.
1583 * This is called when a server target is mounted,
1584 * and this is where we start setting things up.
1585 * @param data Mount options (e.g. -o flock,abort_recov)
1587 static int lustre_tgt_fill_super(struct super_block *sb, void *lmd2_data,
1590 struct lustre_mount_data *lmd;
1591 struct lustre_sb_info *lsi;
1596 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1598 lsi = lustre_init_lsi(sb);
1604 * Disable lockdep during mount, because mount locking patterns are
1610 * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
1612 obd_zombie_barrier();
1614 /* Figure out the lmd from the mount options */
1615 if (lmd_parse(lmd2_data, lmd)) {
1617 GOTO(out, rc = -EINVAL);
1620 if (lmd_is_client(lmd)) {
1622 CERROR("%s: attempting to mount a client with -t lustre_tgt' which is only for server-side mounts: rc = %d\n",
1628 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1629 rc = server_fill_super(sb);
1631 * server_fill_super calls lustre_start_mgc after the mount
1632 * because we need the MGS NIDs which are stored on disk.
1633 * Plus, we may need to start the MGS first.
1635 * server_fill_super will call server_put_super on failure
1637 * If error happens in fill_super() call, @lsi will be killed there.
1638 * This is why we do not put it here.
1642 CERROR("Unable to mount %s (%d)\n",
1643 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1645 CDEBUG(D_SUPER, "Mount %s complete\n",
1652 /***************** FS registration ******************/
1653 static struct dentry *lustre_tgt_mount(struct file_system_type *fs_type,
1654 int flags, const char *devname,
1657 return mount_nodev(fs_type, flags, data, lustre_tgt_fill_super);
1660 /* Register the "lustre_tgt" fs type.
1662 * Right now this isn't any different than the normal "lustre" filesystem
1663 * type, but it is added so that there is some compatibility to allow
1664 * changing documentation and scripts to start using the "lustre_tgt" type
1665 * at mount time. That will simplify test interop, and in case of upgrades
1666 * that change to the new type and then need to roll back for some reason.
1668 * The long-term goal is to disentangle the client and server mount code.
1670 static struct file_system_type lustre_tgt_fstype = {
1671 .owner = THIS_MODULE,
1672 .name = "lustre_tgt",
1673 .mount = lustre_tgt_mount,
1674 .kill_sb = kill_anon_super,
1675 .fs_flags = FS_REQUIRES_DEV | FS_RENAME_DOES_D_MOVE,
1677 MODULE_ALIAS_FS("lustre_tgt");
1679 int lustre_tgt_register_fs(void)
1681 return register_filesystem(&lustre_tgt_fstype);
1684 void lustre_tgt_unregister_fs(void)
1686 unregister_filesystem(&lustre_tgt_fstype);
1689 #endif /* HAVE_SERVER_SUPPORT */