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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/obd_mount.c
38 * Client mount routines
40 * Author: Nathan Rutman <nathan@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_CLASS
45 #define D_MOUNT (D_SUPER|D_CONFIG/*|D_WARNING */)
46 #define PRINT_CMD CDEBUG
50 #include <obd_class.h>
51 #include <lustre/lustre_user.h>
52 #include <lustre_log.h>
53 #include <lustre_disk.h>
54 #include <lustre_param.h>
56 static int (*client_fill_super)(struct super_block *sb,
57 struct vfsmount *mnt);
59 static void (*kill_super_cb)(struct super_block *sb);
61 /**************** 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
68 * @param sb The superblock is used by the MGC to write to the local copy of
70 * @param logname The name of the llog to replicate from the MGS
71 * @param cfg Since the same mgc may be used to follow multiple config logs
72 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
73 * this log, and is added to the mgc's list of logs to follow.
75 int lustre_process_log(struct super_block *sb, char *logname,
76 struct config_llog_instance *cfg)
78 struct lustre_cfg *lcfg;
79 struct lustre_cfg_bufs *bufs;
80 struct lustre_sb_info *lsi = s2lsi(sb);
81 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 lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
97 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
98 lustre_cfg_free(lcfg);
103 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
104 "failed from the MGS (%d). Make sure this "
105 "client and the MGS are running compatible "
106 "versions of Lustre.\n",
107 mgc->obd_name, logname, rc);
110 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
111 "failed (%d). This may be the result of "
112 "communication errors between this node and "
113 "the MGS, a bad configuration, or other "
114 "errors. See the syslog for more "
115 "information.\n", mgc->obd_name, logname,
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;
136 /* mgc_process_config */
137 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
138 lustre_cfg_bufs_set_string(&bufs, 1, logname);
140 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
141 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
142 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
143 lustre_cfg_free(lcfg);
146 EXPORT_SYMBOL(lustre_end_log);
148 /**************** obd start *******************/
150 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
151 * lctl (and do for echo cli/srv.
153 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
154 char *s1, char *s2, char *s3, char *s4)
156 struct lustre_cfg_bufs bufs;
157 struct lustre_cfg * lcfg = NULL;
160 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
161 cmd, s1, s2, s3, s4);
163 lustre_cfg_bufs_reset(&bufs, cfgname);
165 lustre_cfg_bufs_set_string(&bufs, 1, s1);
167 lustre_cfg_bufs_set_string(&bufs, 2, s2);
169 lustre_cfg_bufs_set_string(&bufs, 3, s3);
171 lustre_cfg_bufs_set_string(&bufs, 4, s4);
173 lcfg = lustre_cfg_new(cmd, &bufs);
174 lcfg->lcfg_nid = nid;
175 rc = class_process_config(lcfg);
176 lustre_cfg_free(lcfg);
179 EXPORT_SYMBOL(do_lcfg);
181 /** Call class_attach and class_setup. These methods in turn call
182 * obd type-specific methods.
184 int lustre_start_simple(char *obdname, char *type, char *uuid,
185 char *s1, char *s2, char *s3, char *s4)
188 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
190 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
192 CERROR("%s attach error %d\n", obdname, rc);
195 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
197 CERROR("%s setup error %d\n", obdname, rc);
198 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
203 DEFINE_MUTEX(mgc_start_lock);
205 /** Set up a mgc obd to process startup logs
207 * \param sb [in] super block of the mgc obd
209 * \retval 0 success, otherwise error code
211 int lustre_start_mgc(struct super_block *sb)
213 struct obd_connect_data *data = NULL;
214 struct lustre_sb_info *lsi = s2lsi(sb);
215 struct obd_device *obd;
216 struct obd_export *exp;
217 struct obd_uuid *uuid;
220 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
223 int rc = 0, i = 0, j, len;
225 LASSERT(lsi->lsi_lmd);
227 /* Find the first non-lo MGS nid for our MGC name */
228 if (IS_SERVER(lsi)) {
229 /* mount -o mgsnode=nid */
230 ptr = lsi->lsi_lmd->lmd_mgs;
231 if (lsi->lsi_lmd->lmd_mgs &&
232 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
234 } else if (IS_MGS(lsi)) {
235 lnet_process_id_t id;
236 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
237 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
244 } else { /* client */
245 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
246 ptr = lsi->lsi_lmd->lmd_dev;
247 if (class_parse_nid(ptr, &nid, &ptr) == 0)
251 CERROR("No valid MGS nids found.\n");
255 mutex_lock(&mgc_start_lock);
257 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
258 OBD_ALLOC(mgcname, len);
259 OBD_ALLOC(niduuid, len + 2);
260 if (!mgcname || !niduuid)
261 GOTO(out_free, rc = -ENOMEM);
262 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
264 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
268 GOTO(out_free, rc = -ENOMEM);
270 obd = class_name2obd(mgcname);
271 if (obd && !obd->obd_stopping) {
272 rc = obd_set_info_async(NULL, obd->obd_self_export,
273 strlen(KEY_MGSSEC), KEY_MGSSEC,
274 strlen(mgssec), mgssec, NULL);
278 /* Re-using an existing MGC */
279 atomic_inc(&obd->u.cli.cl_mgc_refcount);
281 /* IR compatibility check, only for clients */
282 if (lmd_is_client(lsi->lsi_lmd)) {
284 int vallen = sizeof(*data);
285 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
287 rc = obd_get_info(NULL, obd->obd_self_export,
288 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
289 &vallen, data, NULL);
291 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
292 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
293 /* LMD_FLG_NOIR is for test purpose only */
295 "Trying to mount a client with IR setting "
296 "not compatible with current mgc. "
297 "Force to use current mgc setting that is "
299 has_ir ? "enabled" : "disabled");
301 *flags &= ~LMD_FLG_NOIR;
303 *flags |= LMD_FLG_NOIR;
308 /* If we are restarting the MGS, don't try to keep the MGC's
309 old connection, or registration will fail. */
311 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
315 /* Try all connections, but only once (again).
316 We don't want to block another target from starting
317 (using its local copy of the log), but we do want to connect
318 if at all possible. */
320 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
321 rc = obd_set_info_async(NULL, obd->obd_self_export,
322 sizeof(KEY_INIT_RECOV_BACKUP),
323 KEY_INIT_RECOV_BACKUP,
324 sizeof(recov_bk), &recov_bk, NULL);
328 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
330 /* Add the primary nids for the MGS */
332 sprintf(niduuid, "%s_%x", mgcname, i);
333 if (IS_SERVER(lsi)) {
334 ptr = lsi->lsi_lmd->lmd_mgs;
336 /* Use local nids (including LO) */
337 lnet_process_id_t id;
338 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
339 rc = do_lcfg(mgcname, id.nid,
340 LCFG_ADD_UUID, niduuid, 0,0,0);
343 /* Use mgsnode= nids */
344 /* mount -o mgsnode=nid */
345 if (lsi->lsi_lmd->lmd_mgs) {
346 ptr = lsi->lsi_lmd->lmd_mgs;
347 } else if (class_find_param(ptr, PARAM_MGSNODE,
349 CERROR("No MGS nids given.\n");
350 GOTO(out_free, rc = -EINVAL);
352 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
353 rc = do_lcfg(mgcname, nid,
354 LCFG_ADD_UUID, niduuid, 0,0,0);
358 } else { /* client */
359 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
360 ptr = lsi->lsi_lmd->lmd_dev;
361 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
362 rc = do_lcfg(mgcname, nid,
363 LCFG_ADD_UUID, niduuid, 0,0,0);
365 /* Stop at the first failover nid */
371 CERROR("No valid MGS nids found.\n");
372 GOTO(out_free, rc = -EINVAL);
374 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
376 /* Random uuid for MGC allows easier reconnects */
378 ll_generate_random_uuid(uuidc);
379 class_uuid_unparse(uuidc, uuid);
382 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
383 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
389 /* Add any failover MGS nids */
391 while (ptr && ((*ptr == ':' ||
392 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
393 /* New failover node */
394 sprintf(niduuid, "%s_%x", mgcname, i);
396 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
398 rc = do_lcfg(mgcname, nid,
399 LCFG_ADD_UUID, niduuid, 0,0,0);
404 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
412 lsi->lsi_lmd->lmd_mgs_failnodes = i;
414 obd = class_name2obd(mgcname);
416 CERROR("Can't find mgcobd %s\n", mgcname);
417 GOTO(out_free, rc = -ENOTCONN);
420 rc = obd_set_info_async(NULL, obd->obd_self_export,
421 strlen(KEY_MGSSEC), KEY_MGSSEC,
422 strlen(mgssec), mgssec, NULL);
426 /* Keep a refcount of servers/clients who started with "mount",
427 so we know when we can get rid of the mgc. */
428 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
430 /* Try all connections, but only once. */
432 rc = obd_set_info_async(NULL, obd->obd_self_export,
433 sizeof(KEY_INIT_RECOV_BACKUP),
434 KEY_INIT_RECOV_BACKUP,
435 sizeof(recov_bk), &recov_bk, NULL);
438 CWARN("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
440 /* We connect to the MGS at setup, and don't disconnect until cleanup */
441 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
442 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
443 OBD_CONNECT_LVB_TYPE;
445 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
446 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
448 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
451 if (lmd_is_client(lsi->lsi_lmd) &&
452 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
453 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
454 data->ocd_version = LUSTRE_VERSION_CODE;
455 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
457 CERROR("connect failed %d\n", rc);
461 obd->u.cli.cl_mgc_mgsexp = exp;
464 /* Keep the mgc info in the sb. Note that many lsi's can point
468 mutex_unlock(&mgc_start_lock);
473 OBD_FREE(mgcname, len);
475 OBD_FREE(niduuid, len + 2);
479 static int lustre_stop_mgc(struct super_block *sb)
481 struct lustre_sb_info *lsi = s2lsi(sb);
482 struct obd_device *obd;
483 char *niduuid = 0, *ptr = 0;
484 int i, rc = 0, len = 0;
493 mutex_lock(&mgc_start_lock);
494 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
495 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
496 /* This is not fatal, every client that stops
497 will call in here. */
498 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
499 atomic_read(&obd->u.cli.cl_mgc_refcount));
500 GOTO(out, rc = -EBUSY);
503 /* The MGC has no recoverable data in any case.
504 * force shotdown set in umount_begin */
505 obd->obd_no_recov = 1;
507 if (obd->u.cli.cl_mgc_mgsexp) {
508 /* An error is not fatal, if we are unable to send the
509 disconnect mgs ping evictor cleans up the export */
510 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
512 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
515 /* Save the obdname for cleaning the nid uuids, which are
517 len = strlen(obd->obd_name) + 6;
518 OBD_ALLOC(niduuid, len);
520 strcpy(niduuid, obd->obd_name);
521 ptr = niduuid + strlen(niduuid);
524 rc = class_manual_cleanup(obd);
528 /* Clean the nid uuids */
530 GOTO(out, rc = -ENOMEM);
532 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
533 sprintf(ptr, "_%x", i);
534 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
537 CERROR("del MDC UUID %s failed: rc = %d\n",
542 OBD_FREE(niduuid, len);
544 /* class_import_put will get rid of the additional connections */
545 mutex_unlock(&mgc_start_lock);
549 /***************** lustre superblock **************/
551 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
553 struct lustre_sb_info *lsi;
558 OBD_ALLOC_PTR(lsi->lsi_lmd);
564 lsi->lsi_lmd->lmd_exclude_count = 0;
565 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
566 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
567 s2lsi_nocast(sb) = lsi;
568 /* we take 1 extra ref for our setup */
569 atomic_set(&lsi->lsi_mounts, 1);
571 /* Default umount style */
572 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
577 static int lustre_free_lsi(struct super_block *sb)
579 struct lustre_sb_info *lsi = s2lsi(sb);
581 LASSERT(lsi != NULL);
582 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
584 /* someone didn't call server_put_mount. */
585 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
587 if (lsi->lsi_lmd != NULL) {
588 if (lsi->lsi_lmd->lmd_dev != NULL)
589 OBD_FREE(lsi->lsi_lmd->lmd_dev,
590 strlen(lsi->lsi_lmd->lmd_dev) + 1);
591 if (lsi->lsi_lmd->lmd_profile != NULL)
592 OBD_FREE(lsi->lsi_lmd->lmd_profile,
593 strlen(lsi->lsi_lmd->lmd_profile) + 1);
594 if (lsi->lsi_lmd->lmd_mgssec != NULL)
595 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
596 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
597 if (lsi->lsi_lmd->lmd_opts != NULL)
598 OBD_FREE(lsi->lsi_lmd->lmd_opts,
599 strlen(lsi->lsi_lmd->lmd_opts) + 1);
600 if (lsi->lsi_lmd->lmd_exclude_count)
601 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
602 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
603 lsi->lsi_lmd->lmd_exclude_count);
604 if (lsi->lsi_lmd->lmd_mgs != NULL)
605 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
606 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
607 if (lsi->lsi_lmd->lmd_osd_type != NULL)
608 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
609 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
610 if (lsi->lsi_lmd->lmd_params != NULL)
611 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
613 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
616 LASSERT(lsi->lsi_llsbi == NULL);
617 OBD_FREE(lsi, sizeof(*lsi));
618 s2lsi_nocast(sb) = NULL;
623 /* The lsi has one reference for every server that is using the disk -
624 e.g. MDT, MGS, and potentially MGC */
625 int lustre_put_lsi(struct super_block *sb)
627 struct lustre_sb_info *lsi = s2lsi(sb);
629 LASSERT(lsi != NULL);
631 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
632 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
633 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
634 obd_disconnect(lsi->lsi_osd_exp);
635 /* wait till OSD is gone */
636 obd_zombie_barrier();
645 * <FSNAME><SEPERATOR><TYPE><INDEX>
646 * FSNAME is between 1 and 8 characters (inclusive).
647 * Excluded characters are '/' and ':'
648 * SEPERATOR is either ':' or '-'
649 * TYPE: "OST", "MDT", etc.
650 * INDEX: Hex representation of the index
653 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
654 * @param [in] svname server name including type and index
655 * @param [out] fsname Buffer to copy filesystem name prefix into.
656 * Must have at least 'strlen(fsname) + 1' chars.
657 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
660 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
664 dash = svname + strnlen(svname, 8); /* max fsname length is 8 */
665 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
670 if (fsname != NULL) {
671 strncpy(fsname, svname, dash - svname);
672 fsname[dash - svname] = '\0';
680 EXPORT_SYMBOL(server_name2fsname);
683 * Get service name (svname) from string
685 * if endptr isn't NULL it is set to end of fsname *
687 int server_name2svname(const char *label, char *svname, const char **endptr,
693 /* We use server_name2fsname() just for parsing */
694 rc = server_name2fsname(label, NULL, &dash);
701 if (strlcpy(svname, dash + 1, svsize) >= svsize)
706 EXPORT_SYMBOL(server_name2svname);
709 /* Get the index from the obd name.
712 if endptr isn't NULL it is set to end of name */
713 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
719 /* We use server_name2fsname() just for parsing */
720 rc = server_name2fsname(svname, NULL, &dash);
726 if (strncmp(dash, "MDT", 3) == 0)
727 rc = LDD_F_SV_TYPE_MDT;
728 else if (strncmp(dash, "OST", 3) == 0)
729 rc = LDD_F_SV_TYPE_OST;
735 if (strncmp(dash, "all", 3) == 0) {
738 return rc | LDD_F_SV_ALL;
741 index = simple_strtoul(dash, (char **)endptr, 16);
745 /* Account for -mdc after index that is possible when specifying mdt */
746 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
747 sizeof(LUSTRE_MDC_NAME)-1) == 0)
748 *endptr += sizeof(LUSTRE_MDC_NAME);
752 EXPORT_SYMBOL(server_name2index);
754 /*************** mount common betweeen server and client ***************/
757 int lustre_common_put_super(struct super_block *sb)
761 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
763 /* Drop a ref to the MGC */
764 rc = lustre_stop_mgc(sb);
765 if (rc && (rc != -ENOENT)) {
767 CERROR("Can't stop MGC: %d\n", rc);
770 /* BUSY just means that there's some other obd that
771 needs the mgc. Let him clean it up. */
772 CDEBUG(D_MOUNT, "MGC still in use\n");
774 /* Drop a ref to the mounted disk */
779 EXPORT_SYMBOL(lustre_common_put_super);
781 static void lmd_print(struct lustre_mount_data *lmd)
785 PRINT_CMD(D_MOUNT, " mount data:\n");
786 if (lmd_is_client(lmd))
787 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
788 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
789 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
792 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
794 if (lmd->lmd_recovery_time_soft)
795 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
796 lmd->lmd_recovery_time_soft);
798 if (lmd->lmd_recovery_time_hard)
799 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
800 lmd->lmd_recovery_time_hard);
802 for (i = 0; i < lmd->lmd_exclude_count; i++) {
803 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
804 lmd->lmd_exclude[i]);
808 /* Is this server on the exclusion list */
809 int lustre_check_exclusion(struct super_block *sb, char *svname)
811 struct lustre_sb_info *lsi = s2lsi(sb);
812 struct lustre_mount_data *lmd = lsi->lsi_lmd;
816 rc = server_name2index(svname, &index, NULL);
817 if (rc != LDD_F_SV_TYPE_OST)
818 /* Only exclude OSTs */
821 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
822 index, lmd->lmd_exclude_count, lmd->lmd_dev);
824 for(i = 0; i < lmd->lmd_exclude_count; i++) {
825 if (index == lmd->lmd_exclude[i]) {
826 CWARN("Excluding %s (on exclusion list)\n", svname);
833 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
834 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
836 const char *s1 = ptr, *s2;
837 __u32 index, *exclude_list;
840 /* The shortest an ost name can be is 8 chars: -OST0000.
841 We don't actually know the fsname at this time, so in fact
842 a user could specify any fsname. */
843 devmax = strlen(ptr) / 8 + 1;
845 /* temp storage until we figure out how many we have */
846 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
850 /* we enter this fn pointing at the '=' */
851 while (*s1 && *s1 != ' ' && *s1 != ',') {
853 rc = server_name2index(s1, &index, &s2);
855 CERROR("Can't parse server name '%s': rc = %d\n",
859 if (rc == LDD_F_SV_TYPE_OST)
860 exclude_list[lmd->lmd_exclude_count++] = index;
862 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
863 (uint)(s2-s1), s1, rc);
865 /* now we are pointing at ':' (next exclude)
866 or ',' (end of excludes) */
867 if (lmd->lmd_exclude_count >= devmax)
870 if (rc >= 0) /* non-err */
873 if (lmd->lmd_exclude_count) {
874 /* permanent, freed in lustre_free_lsi */
875 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
876 lmd->lmd_exclude_count);
877 if (lmd->lmd_exclude) {
878 memcpy(lmd->lmd_exclude, exclude_list,
879 sizeof(index) * lmd->lmd_exclude_count);
882 lmd->lmd_exclude_count = 0;
885 OBD_FREE(exclude_list, sizeof(index) * devmax);
889 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
894 if (lmd->lmd_mgssec != NULL) {
895 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
896 lmd->lmd_mgssec = NULL;
899 tail = strchr(ptr, ',');
901 length = strlen(ptr);
905 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
906 if (lmd->lmd_mgssec == NULL)
909 memcpy(lmd->lmd_mgssec, ptr, length);
910 lmd->lmd_mgssec[length] = '\0';
914 static int lmd_parse_string(char **handle, char *ptr)
919 if ((handle == NULL) || (ptr == NULL))
922 if (*handle != NULL) {
923 OBD_FREE(*handle, strlen(*handle) + 1);
927 tail = strchr(ptr, ',');
929 length = strlen(ptr);
933 OBD_ALLOC(*handle, length + 1);
937 memcpy(*handle, ptr, length);
938 (*handle)[length] = '\0';
943 /* Collect multiple values for mgsnid specifiers */
944 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
952 /* Find end of nidlist */
953 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
954 length = tail - *ptr;
956 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
960 if (lmd->lmd_mgs != NULL)
961 oldlen = strlen(lmd->lmd_mgs) + 1;
963 OBD_ALLOC(mgsnid, oldlen + length + 1);
967 if (lmd->lmd_mgs != NULL) {
968 /* Multiple mgsnid= are taken to mean failover locations */
969 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
970 mgsnid[oldlen - 1] = ':';
971 OBD_FREE(lmd->lmd_mgs, oldlen);
973 memcpy(mgsnid + oldlen, *ptr, length);
974 mgsnid[oldlen + length] = '\0';
975 lmd->lmd_mgs = mgsnid;
981 /** Parse mount line options
982 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
983 * dev is passed as device=uml1:/lustre by mount.lustre
985 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
987 char *s1, *s2, *devname = NULL;
988 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
993 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
994 "/sbin/mount.lustre is installed.\n");
998 /* Options should be a string - try to detect old lmd data */
999 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1000 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1001 "/sbin/mount.lustre. Please install "
1002 "version %s\n", LUSTRE_VERSION_STRING);
1005 lmd->lmd_magic = LMD_MAGIC;
1007 OBD_ALLOC(lmd->lmd_params, 4096);
1008 if (lmd->lmd_params == NULL)
1010 lmd->lmd_params[0] = '\0';
1012 /* Set default flags here */
1017 int time_min = OBD_RECOVERY_TIME_MIN;
1019 /* Skip whitespace and extra commas */
1020 while (*s1 == ' ' || *s1 == ',')
1023 /* Client options are parsed in ll_options: eg. flock,
1026 /* Parse non-ldiskfs options here. Rather than modifying
1027 ldiskfs, we just zero these out here */
1028 if (strncmp(s1, "abort_recov", 11) == 0) {
1029 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1031 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1032 lmd->lmd_recovery_time_soft = max_t(int,
1033 simple_strtoul(s1 + 19, NULL, 10), time_min);
1035 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1036 lmd->lmd_recovery_time_hard = max_t(int,
1037 simple_strtoul(s1 + 19, NULL, 10), time_min);
1039 } else if (strncmp(s1, "noir", 4) == 0) {
1040 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1042 } else if (strncmp(s1, "nosvc", 5) == 0) {
1043 lmd->lmd_flags |= LMD_FLG_NOSVC;
1045 } else if (strncmp(s1, "nomgs", 5) == 0) {
1046 lmd->lmd_flags |= LMD_FLG_NOMGS;
1048 } else if (strncmp(s1, "noscrub", 7) == 0) {
1049 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1051 } else if (strncmp(s1, PARAM_MGSNODE,
1052 sizeof(PARAM_MGSNODE) - 1) == 0) {
1053 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1054 /* Assume the next mount opt is the first
1055 invalid nid we get to. */
1056 rc = lmd_parse_mgs(lmd, &s2);
1060 } else if (strncmp(s1, "writeconf", 9) == 0) {
1061 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1063 } else if (strncmp(s1, "update", 6) == 0) {
1064 lmd->lmd_flags |= LMD_FLG_UPDATE;
1066 } else if (strncmp(s1, "virgin", 6) == 0) {
1067 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1069 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1070 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1072 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1073 rc = lmd_parse_mgssec(lmd, s1 + 7);
1077 /* ost exclusion list */
1078 } else if (strncmp(s1, "exclude=", 8) == 0) {
1079 rc = lmd_make_exclusion(lmd, s1 + 7);
1083 } else if (strncmp(s1, "mgs", 3) == 0) {
1085 lmd->lmd_flags |= LMD_FLG_MGS;
1087 } else if (strncmp(s1, "svname=", 7) == 0) {
1088 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1092 } else if (strncmp(s1, "param=", 6) == 0) {
1094 char *tail = strchr(s1 + 6, ',');
1096 length = strlen(s1);
1100 strncat(lmd->lmd_params, s1 + 6, length);
1101 strcat(lmd->lmd_params, " ");
1103 } else if (strncmp(s1, "osd=", 4) == 0) {
1104 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1109 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1110 end of the options. */
1111 else if (strncmp(s1, "device=", 7) == 0) {
1113 /* terminate options right before device. device
1114 must be the last one. */
1120 s2 = strchr(s1, ',');
1128 memmove(s1, s2, strlen(s2) + 1);
1134 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1135 "(need mount option 'device=...')\n");
1139 s1 = strstr(devname, ":/");
1142 lmd->lmd_flags |= LMD_FLG_CLIENT;
1143 /* Remove leading /s from fsname */
1144 while (*++s1 == '/') ;
1145 /* Freed in lustre_free_lsi */
1146 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
1147 if (!lmd->lmd_profile)
1149 sprintf(lmd->lmd_profile, "%s-client", s1);
1152 /* Freed in lustre_free_lsi */
1153 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1156 strcpy(lmd->lmd_dev, devname);
1158 /* Save mount options */
1159 s1 = options + strlen(options) - 1;
1160 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1162 if (*options != 0) {
1163 /* Freed in lustre_free_lsi */
1164 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1167 strcpy(lmd->lmd_opts, options);
1171 lmd->lmd_magic = LMD_MAGIC;
1176 CERROR("Bad mount options %s\n", options);
1180 struct lustre_mount_data2 {
1182 struct vfsmount *lmd2_mnt;
1185 /** This is the entry point for the mount call into Lustre.
1186 * This is called when a server or client is mounted,
1187 * and this is where we start setting things up.
1188 * @param data Mount options (e.g. -o flock,abort_recov)
1190 int lustre_fill_super(struct super_block *sb, void *data, int silent)
1192 struct lustre_mount_data *lmd;
1193 struct lustre_mount_data2 *lmd2 = data;
1194 struct lustre_sb_info *lsi;
1197 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1199 lsi = lustre_init_lsi(sb);
1205 * Disable lockdep during mount, because mount locking patterns are
1211 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
1213 obd_zombie_barrier();
1215 /* Figure out the lmd from the mount options */
1216 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
1218 GOTO(out, rc = -EINVAL);
1221 if (lmd_is_client(lmd)) {
1222 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1223 if (!client_fill_super) {
1224 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
1225 "client mount! Is the 'lustre' "
1226 "module loaded?\n");
1230 rc = lustre_start_mgc(sb);
1235 /* Connect and start */
1236 /* (should always be ll_fill_super) */
1237 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
1238 /* c_f_s will call lustre_common_put_super on failure */
1241 CERROR("This is client-side-only module, "
1242 "cannot handle server mount.\n");
1246 /* If error happens in fill_super() call, @lsi will be killed there.
1247 * This is why we do not put it here. */
1251 CERROR("Unable to mount %s (%d)\n",
1252 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1254 CDEBUG(D_SUPER, "Mount %s complete\n",
1262 /* We can't call ll_fill_super by name because it lives in a module that
1263 must be loaded after this one. */
1264 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
1265 struct vfsmount *mnt))
1267 client_fill_super = cfs;
1269 EXPORT_SYMBOL(lustre_register_client_fill_super);
1271 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1273 kill_super_cb = cfs;
1275 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1277 /***************** FS registration ******************/
1278 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1279 const char *devname, void *data)
1281 struct lustre_mount_data2 lmd2 = { data, NULL };
1283 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
1286 void lustre_kill_super(struct super_block *sb)
1288 struct lustre_sb_info *lsi = s2lsi(sb);
1290 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1291 (*kill_super_cb)(sb);
1293 kill_anon_super(sb);
1296 /** Register the "lustre" fs type
1298 struct file_system_type lustre_fs_type = {
1299 .owner = THIS_MODULE,
1301 .mount = lustre_mount,
1302 .kill_sb = lustre_kill_super,
1303 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
1304 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
1307 int lustre_register_fs(void)
1309 return register_filesystem(&lustre_fs_type);
1312 int lustre_unregister_fs(void)
1314 return unregister_filesystem(&lustre_fs_type);