1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/obdclass/obd_mount.c
40 * Client/server mount routines
42 * Author: Nathan Rutman <nathan@clusterfs.com>
46 #define DEBUG_SUBSYSTEM S_CLASS
47 #define D_MOUNT D_SUPER|D_CONFIG /*|D_WARNING */
48 #define PRINT_CMD CDEBUG
49 #define PRINT_MASK D_SUPER|D_CONFIG
53 #include <lustre_fsfilt.h>
54 #include <obd_class.h>
55 #include <lustre/lustre_user.h>
56 #include <linux/version.h>
57 #include <lustre_log.h>
58 #include <lustre_disk.h>
59 #include <lustre_param.h>
61 static int (*client_fill_super)(struct super_block *sb,
62 struct vfsmount *mnt) = NULL;
63 static void (*kill_super_cb)(struct super_block *sb) = NULL;
65 /*********** mount lookup *********/
67 CFS_DEFINE_MUTEX(lustre_mount_info_lock);
68 static CFS_LIST_HEAD(server_mount_info_list);
70 static struct lustre_mount_info *server_find_mount(const char *name)
73 struct lustre_mount_info *lmi;
76 cfs_list_for_each(tmp, &server_mount_info_list) {
77 lmi = cfs_list_entry(tmp, struct lustre_mount_info,
79 if (strcmp(name, lmi->lmi_name) == 0)
85 /* we must register an obd for a mount before we call the setup routine.
86 *_setup will call lustre_get_mount to get the mnt struct
87 by obd_name, since we can't pass the pointer to setup. */
88 static int server_register_mount(const char *name, struct super_block *sb,
91 struct lustre_mount_info *lmi;
98 OBD_ALLOC(lmi, sizeof(*lmi));
101 OBD_ALLOC(name_cp, strlen(name) + 1);
103 OBD_FREE(lmi, sizeof(*lmi));
106 strcpy(name_cp, name);
108 cfs_mutex_lock(&lustre_mount_info_lock);
110 if (server_find_mount(name)) {
111 cfs_mutex_unlock(&lustre_mount_info_lock);
112 OBD_FREE(lmi, sizeof(*lmi));
113 OBD_FREE(name_cp, strlen(name) + 1);
114 CERROR("Already registered %s\n", name);
117 lmi->lmi_name = name_cp;
120 cfs_list_add(&lmi->lmi_list_chain, &server_mount_info_list);
122 cfs_mutex_unlock(&lustre_mount_info_lock);
124 CDEBUG(D_MOUNT, "reg_mnt %p from %s, vfscount=%d\n",
125 lmi->lmi_mnt, name, mnt_get_count(lmi->lmi_mnt));
130 /* when an obd no longer needs a mount */
131 static int server_deregister_mount(const char *name)
133 struct lustre_mount_info *lmi;
136 cfs_mutex_lock(&lustre_mount_info_lock);
137 lmi = server_find_mount(name);
139 cfs_mutex_unlock(&lustre_mount_info_lock);
140 CERROR("%s not registered\n", name);
144 CDEBUG(D_MOUNT, "dereg_mnt %p from %s, vfscount=%d\n",
145 lmi->lmi_mnt, name, mnt_get_count(lmi->lmi_mnt));
147 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
148 cfs_list_del(&lmi->lmi_list_chain);
149 OBD_FREE(lmi, sizeof(*lmi));
150 cfs_mutex_unlock(&lustre_mount_info_lock);
155 /* obd's look up a registered mount using their obdname. This is just
156 for initial obd setup to find the mount struct. It should not be
157 called every time you want to mntget. */
158 struct lustre_mount_info *server_get_mount(const char *name)
160 struct lustre_mount_info *lmi;
161 struct lustre_sb_info *lsi;
164 cfs_mutex_lock(&lustre_mount_info_lock);
165 lmi = server_find_mount(name);
166 cfs_mutex_unlock(&lustre_mount_info_lock);
168 CERROR("Can't find mount for %s\n", name);
171 lsi = s2lsi(lmi->lmi_sb);
172 mntget(lmi->lmi_mnt);
173 cfs_atomic_inc(&lsi->lsi_mounts);
175 CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d, vfscount=%d\n",
176 lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts),
177 mnt_get_count(lmi->lmi_mnt));
183 * Used by mdt to get mount_info from obdname.
184 * There are no blocking when using the mount_info.
185 * Do not use server_get_mount for this purpose.
187 struct lustre_mount_info *server_get_mount_2(const char *name)
189 struct lustre_mount_info *lmi;
192 cfs_mutex_lock(&lustre_mount_info_lock);
193 lmi = server_find_mount(name);
194 cfs_mutex_unlock(&lustre_mount_info_lock);
196 CERROR("Can't find mount for %s\n", name);
201 static void unlock_mntput(struct vfsmount *mnt)
203 if (kernel_locked()) {
212 static int lustre_put_lsi(struct super_block *sb);
214 /* to be called from obd_cleanup methods */
215 int server_put_mount(const char *name, struct vfsmount *mnt)
217 struct lustre_mount_info *lmi;
218 struct lustre_sb_info *lsi;
219 int count = mnt_get_count(mnt) - 1;
222 /* This might be the last one, can't deref after this */
225 cfs_mutex_lock(&lustre_mount_info_lock);
226 lmi = server_find_mount(name);
227 cfs_mutex_unlock(&lustre_mount_info_lock);
229 CERROR("Can't find mount for %s\n", name);
232 lsi = s2lsi(lmi->lmi_sb);
233 LASSERT(lmi->lmi_mnt == mnt);
235 CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d, vfscount=%d\n",
236 lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts), count);
238 if (lustre_put_lsi(lmi->lmi_sb)) {
239 CDEBUG(D_MOUNT, "Last put of mnt %p from %s, vfscount=%d\n",
240 lmi->lmi_mnt, name, count);
241 /* last mount is the One True Mount */
243 CERROR("%s: mount busy, vfscount=%d!\n", name, count);
246 /* this obd should never need the mount again */
247 server_deregister_mount(name);
252 /* Corresponding to server_get_mount_2 */
253 int server_put_mount_2(const char *name, struct vfsmount *mnt)
259 /******* mount helper utilities *********/
262 static void ldd_print(struct lustre_disk_data *ldd)
264 PRINT_CMD(PRINT_MASK, " disk data:\n");
265 PRINT_CMD(PRINT_MASK, "server: %s\n", ldd->ldd_svname);
266 PRINT_CMD(PRINT_MASK, "uuid: %s\n", (char *)ldd->ldd_uuid);
267 PRINT_CMD(PRINT_MASK, "fs: %s\n", ldd->ldd_fsname);
268 PRINT_CMD(PRINT_MASK, "index: %04x\n", ldd->ldd_svindex);
269 PRINT_CMD(PRINT_MASK, "config: %d\n", ldd->ldd_config_ver);
270 PRINT_CMD(PRINT_MASK, "flags: %#x\n", ldd->ldd_flags);
271 PRINT_CMD(PRINT_MASK, "diskfs: %s\n", MT_STR(ldd));
272 PRINT_CMD(PRINT_MASK, "options: %s\n", ldd->ldd_mount_opts);
273 PRINT_CMD(PRINT_MASK, "params: %s\n", ldd->ldd_params);
274 PRINT_CMD(PRINT_MASK, "comment: %s\n", ldd->ldd_userdata);
278 static int ldd_parse(struct lvfs_run_ctxt *mount_ctxt,
279 struct lustre_disk_data *ldd)
281 struct lvfs_run_ctxt saved;
288 push_ctxt(&saved, mount_ctxt, NULL);
290 file = filp_open(MOUNT_DATA_FILE, O_RDONLY, 0644);
293 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
297 len = i_size_read(file->f_dentry->d_inode);
298 CDEBUG(D_MOUNT, "Have %s, size %lu\n", MOUNT_DATA_FILE, len);
299 if (len != sizeof(*ldd)) {
300 CERROR("disk data size does not match: see %lu expect %u\n",
301 len, (int)sizeof(*ldd));
302 GOTO(out_close, rc = -EINVAL);
305 rc = lustre_fread(file, ldd, len, &off);
307 CERROR("error reading %s: read %d of %lu\n",
308 MOUNT_DATA_FILE, rc, len);
309 GOTO(out_close, rc = -EINVAL);
313 if (ldd->ldd_magic != LDD_MAGIC) {
314 /* FIXME add swabbing support */
315 CERROR("Bad magic in %s: %x!=%x\n", MOUNT_DATA_FILE,
316 ldd->ldd_magic, LDD_MAGIC);
317 GOTO(out_close, rc = -EINVAL);
320 if (ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP) {
321 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
323 ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP);
324 GOTO(out_close, rc = -EINVAL);
326 if (ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP) {
327 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
329 ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP);
330 /* Do something like remount filesystem read-only */
331 GOTO(out_close, rc = -EINVAL);
337 pop_ctxt(&saved, mount_ctxt, NULL);
341 static int ldd_write(struct lvfs_run_ctxt *mount_ctxt,
342 struct lustre_disk_data *ldd)
344 struct lvfs_run_ctxt saved;
347 unsigned long len = sizeof(struct lustre_disk_data);
351 LASSERT(ldd->ldd_magic == LDD_MAGIC);
353 ldd->ldd_config_ver++;
355 push_ctxt(&saved, mount_ctxt, NULL);
357 file = filp_open(MOUNT_DATA_FILE, O_RDWR|O_SYNC, 0644);
360 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
364 rc = lustre_fwrite(file, ldd, len, &off);
366 CERROR("error writing %s: read %d of %lu\n",
367 MOUNT_DATA_FILE, rc, len);
368 GOTO(out_close, rc = -EINVAL);
376 pop_ctxt(&saved, mount_ctxt, NULL);
381 /**************** config llog ********************/
383 /** Get a config log from the MGS and process it.
384 * This func is called for both clients and servers.
385 * Continue to process new statements appended to the logs
386 * (whenever the config lock is revoked) until lustre_end_log
388 * @param sb The superblock is used by the MGC to write to the local copy of
390 * @param logname The name of the llog to replicate from the MGS
391 * @param cfg Since the same mgc may be used to follow multiple config logs
392 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
393 * this log, and is added to the mgc's list of logs to follow.
395 int lustre_process_log(struct super_block *sb, char *logname,
396 struct config_llog_instance *cfg)
398 struct lustre_cfg *lcfg;
399 struct lustre_cfg_bufs *bufs;
400 struct lustre_sb_info *lsi = s2lsi(sb);
401 struct obd_device *mgc = lsi->lsi_mgc;
412 /* mgc_process_config */
413 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
414 lustre_cfg_bufs_set_string(bufs, 1, logname);
415 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
416 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
417 lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
418 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
419 lustre_cfg_free(lcfg);
424 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
425 "failed from the MGS (%d). Make sure this "
426 "client and the MGS are running compatible "
427 "versions of Lustre.\n",
428 mgc->obd_name, logname, rc);
431 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
432 "failed (%d). This may be the result of "
433 "communication errors between this node and "
434 "the MGS, a bad configuration, or other "
435 "errors. See the syslog for more "
436 "information.\n", mgc->obd_name, logname,
439 /* class_obd_list(); */
443 /* Stop watching this config log for updates */
444 int lustre_end_log(struct super_block *sb, char *logname,
445 struct config_llog_instance *cfg)
447 struct lustre_cfg *lcfg;
448 struct lustre_cfg_bufs bufs;
449 struct lustre_sb_info *lsi = s2lsi(sb);
450 struct obd_device *mgc = lsi->lsi_mgc;
457 /* mgc_process_config */
458 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
459 lustre_cfg_bufs_set_string(&bufs, 1, logname);
461 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
462 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
463 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
464 lustre_cfg_free(lcfg);
468 /**************** obd start *******************/
470 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
471 * lctl (and do for echo cli/srv.
473 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
474 char *s1, char *s2, char *s3, char *s4)
476 struct lustre_cfg_bufs bufs;
477 struct lustre_cfg * lcfg = NULL;
480 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
481 cmd, s1, s2, s3, s4);
483 lustre_cfg_bufs_reset(&bufs, cfgname);
485 lustre_cfg_bufs_set_string(&bufs, 1, s1);
487 lustre_cfg_bufs_set_string(&bufs, 2, s2);
489 lustre_cfg_bufs_set_string(&bufs, 3, s3);
491 lustre_cfg_bufs_set_string(&bufs, 4, s4);
493 lcfg = lustre_cfg_new(cmd, &bufs);
494 lcfg->lcfg_nid = nid;
495 rc = class_process_config(lcfg);
496 lustre_cfg_free(lcfg);
500 /** Call class_attach and class_setup. These methods in turn call
501 * obd type-specific methods.
503 static int lustre_start_simple(char *obdname, char *type, char *uuid,
507 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
509 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
511 CERROR("%s attach error %d\n", obdname, rc);
514 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, 0, 0);
516 CERROR("%s setup error %d\n", obdname, rc);
517 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
522 /* Set up a MGS to serve startup logs */
523 static int server_start_mgs(struct super_block *sb)
525 struct lustre_sb_info *lsi = s2lsi(sb);
526 struct vfsmount *mnt = lsi->lsi_srv_mnt;
527 struct lustre_mount_info *lmi;
532 /* It is impossible to have more than 1 MGS per node, since
533 MGC wouldn't know which to connect to */
534 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
536 lsi = s2lsi(lmi->lmi_sb);
537 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
539 lsi->lsi_ldd->ldd_svname);
543 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
545 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
548 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
549 LUSTRE_MGS_OBDNAME, 0, 0);
550 /* Do NOT call server_deregister_mount() here. This leads to
551 * inability cleanup cleanly and free lsi and other stuff when
552 * mgs calls server_put_mount() in error handling case. -umka */
556 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
557 "Is the 'mgs' module loaded?\n",
558 LUSTRE_MGS_OBDNAME, rc);
562 static int server_stop_mgs(struct super_block *sb)
564 struct obd_device *obd;
568 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
570 /* There better be only one MGS */
571 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
573 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
577 /* The MGS should always stop when we say so */
579 rc = class_manual_cleanup(obd);
583 CFS_DEFINE_MUTEX(mgc_start_lock);
585 /** Set up a mgc obd to process startup logs
587 * \param sb [in] super block of the mgc obd
589 * \retval 0 success, otherwise error code
591 static int lustre_start_mgc(struct super_block *sb)
593 struct obd_connect_data *data = NULL;
594 struct lustre_sb_info *lsi = s2lsi(sb);
595 struct obd_device *obd;
596 struct obd_export *exp;
597 struct obd_uuid *uuid;
600 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
603 int rc = 0, i = 0, j, len;
606 LASSERT(lsi->lsi_lmd);
608 /* Find the first non-lo MGS nid for our MGC name */
609 if (lsi->lsi_flags & LSI_SERVER) {
610 ptr = lsi->lsi_ldd->ldd_params;
611 /* Use mgsnode= nids */
612 if ((class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0) &&
613 (class_parse_nid(ptr, &nid, &ptr) == 0)) {
615 } else if (IS_MGS(lsi->lsi_ldd)) {
616 lnet_process_id_t id;
617 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
618 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
625 } else { /* client */
626 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
627 ptr = lsi->lsi_lmd->lmd_dev;
628 if (class_parse_nid(ptr, &nid, &ptr) == 0)
632 CERROR("No valid MGS nids found.\n");
636 cfs_mutex_lock(&mgc_start_lock);
638 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
639 OBD_ALLOC(mgcname, len);
640 OBD_ALLOC(niduuid, len + 2);
641 if (!mgcname || !niduuid)
642 GOTO(out_free, rc = -ENOMEM);
643 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
645 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
649 GOTO(out_free, rc = -ENOMEM);
651 obd = class_name2obd(mgcname);
652 if (obd && !obd->obd_stopping) {
653 rc = obd_set_info_async(obd->obd_self_export,
654 strlen(KEY_MGSSEC), KEY_MGSSEC,
655 strlen(mgssec), mgssec, NULL);
659 /* Re-using an existing MGC */
660 cfs_atomic_inc(&obd->u.cli.cl_mgc_refcount);
662 /* IR compatibility check, only for clients */
663 if (lmd_is_client(lsi->lsi_lmd)) {
665 int vallen = sizeof(*data);
666 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
668 rc = obd_get_info(obd->obd_self_export,
669 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
670 &vallen, data, NULL);
672 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
673 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
674 /* LMD_FLG_NOIR is for test purpose only */
676 "Trying to mount a client with IR setting "
677 "not compatible with current mgc. "
678 "Force to use current mgc setting that is "
680 has_ir ? "enabled" : "disabled");
682 *flags &= ~LMD_FLG_NOIR;
684 *flags |= LMD_FLG_NOIR;
689 /* If we are restarting the MGS, don't try to keep the MGC's
690 old connection, or registration will fail. */
691 if ((lsi->lsi_flags & LSI_SERVER) && IS_MGS(lsi->lsi_ldd)) {
692 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
696 /* Try all connections, but only once (again).
697 We don't want to block another target from starting
698 (using its local copy of the log), but we do want to connect
699 if at all possible. */
701 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
702 rc = obd_set_info_async(obd->obd_self_export,
703 sizeof(KEY_INIT_RECOV_BACKUP),
704 KEY_INIT_RECOV_BACKUP,
705 sizeof(recov_bk), &recov_bk, NULL);
709 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
711 /* Add the primary nids for the MGS */
713 sprintf(niduuid, "%s_%x", mgcname, i);
714 if (lsi->lsi_flags & LSI_SERVER) {
715 ptr = lsi->lsi_ldd->ldd_params;
716 if (IS_MGS(lsi->lsi_ldd)) {
717 /* Use local nids (including LO) */
718 lnet_process_id_t id;
719 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
720 rc = do_lcfg(mgcname, id.nid,
721 LCFG_ADD_UUID, niduuid, 0,0,0);
724 /* Use mgsnode= nids */
725 if (class_find_param(ptr, PARAM_MGSNODE, &ptr) != 0) {
726 CERROR("No MGS nids given.\n");
727 GOTO(out_free, rc = -EINVAL);
729 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
730 rc = do_lcfg(mgcname, nid,
731 LCFG_ADD_UUID, niduuid, 0,0,0);
735 } else { /* client */
736 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
737 ptr = lsi->lsi_lmd->lmd_dev;
738 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
739 rc = do_lcfg(mgcname, nid,
740 LCFG_ADD_UUID, niduuid, 0,0,0);
742 /* Stop at the first failover nid */
748 CERROR("No valid MGS nids found.\n");
749 GOTO(out_free, rc = -EINVAL);
751 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
753 /* Random uuid for MGC allows easier reconnects */
755 ll_generate_random_uuid(uuidc);
756 class_uuid_unparse(uuidc, uuid);
759 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
760 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
766 /* Add any failover MGS nids */
768 while ((*ptr == ':' ||
769 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0)) {
770 /* New failover node */
771 sprintf(niduuid, "%s_%x", mgcname, i);
773 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
775 rc = do_lcfg(mgcname, nid,
776 LCFG_ADD_UUID, niduuid, 0,0,0);
781 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
789 lsi->lsi_lmd->lmd_mgs_failnodes = i;
791 obd = class_name2obd(mgcname);
793 CERROR("Can't find mgcobd %s\n", mgcname);
794 GOTO(out_free, rc = -ENOTCONN);
797 rc = obd_set_info_async(obd->obd_self_export,
798 strlen(KEY_MGSSEC), KEY_MGSSEC,
799 strlen(mgssec), mgssec, NULL);
803 /* Keep a refcount of servers/clients who started with "mount",
804 so we know when we can get rid of the mgc. */
805 cfs_atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
807 /* Try all connections, but only once. */
809 rc = obd_set_info_async(obd->obd_self_export,
810 sizeof(KEY_INIT_RECOV_BACKUP),
811 KEY_INIT_RECOV_BACKUP,
812 sizeof(recov_bk), &recov_bk, NULL);
815 CWARN("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
816 /* We connect to the MGS at setup, and don't disconnect until cleanup */
817 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_FID |
818 OBD_CONNECT_AT | OBD_CONNECT_FULL20 |
819 OBD_CONNECT_IMP_RECOV;
820 if (lmd_is_client(lsi->lsi_lmd) &&
821 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
822 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
823 data->ocd_version = LUSTRE_VERSION_CODE;
824 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
826 CERROR("connect failed %d\n", rc);
830 obd->u.cli.cl_mgc_mgsexp = exp;
833 /* Keep the mgc info in the sb. Note that many lsi's can point
837 cfs_mutex_unlock(&mgc_start_lock);
842 OBD_FREE(mgcname, len);
844 OBD_FREE(niduuid, len + 2);
848 static int lustre_stop_mgc(struct super_block *sb)
850 struct lustre_sb_info *lsi = s2lsi(sb);
851 struct obd_device *obd;
852 char *niduuid = 0, *ptr = 0;
853 int i, rc = 0, len = 0;
863 cfs_mutex_lock(&mgc_start_lock);
864 LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
865 if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
866 /* This is not fatal, every client that stops
867 will call in here. */
868 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
869 cfs_atomic_read(&obd->u.cli.cl_mgc_refcount));
870 GOTO(out, rc = -EBUSY);
873 /* The MGC has no recoverable data in any case.
874 * force shotdown set in umount_begin */
875 obd->obd_no_recov = 1;
877 if (obd->u.cli.cl_mgc_mgsexp) {
878 /* An error is not fatal, if we are unable to send the
879 disconnect mgs ping evictor cleans up the export */
880 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
882 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
885 /* Save the obdname for cleaning the nid uuids, which are
887 len = strlen(obd->obd_name) + 6;
888 OBD_ALLOC(niduuid, len);
890 strcpy(niduuid, obd->obd_name);
891 ptr = niduuid + strlen(niduuid);
894 rc = class_manual_cleanup(obd);
898 /* Clean the nid uuids */
900 GOTO(out, rc = -ENOMEM);
902 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
903 sprintf(ptr, "_%x", i);
904 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
907 CERROR("del MDC UUID %s failed: rc = %d\n",
912 OBD_FREE(niduuid, len);
914 /* class_import_put will get rid of the additional connections */
915 cfs_mutex_unlock(&mgc_start_lock);
919 /* Since there's only one mgc per node, we have to change it's fs to get
920 access to the right disk. */
921 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
923 struct lustre_sb_info *lsi = s2lsi(sb);
927 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
929 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
930 rc = obd_set_info_async(mgc->obd_self_export,
931 sizeof(KEY_SET_FS), KEY_SET_FS,
932 sizeof(*sb), sb, NULL);
934 CERROR("can't set_fs %d\n", rc);
940 static int server_mgc_clear_fs(struct obd_device *mgc)
945 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
947 rc = obd_set_info_async(mgc->obd_self_export,
948 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
953 CFS_DEFINE_MUTEX(server_start_lock);
955 /* Stop MDS/OSS if nobody is using them */
956 static int server_stop_servers(int lddflags, int lsiflags)
958 struct obd_device *obd = NULL;
959 struct obd_type *type = NULL;
963 cfs_mutex_lock(&server_start_lock);
965 /* Either an MDT or an OST or neither */
966 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
967 if ((lddflags & LDD_F_SV_TYPE_MDT) &&
968 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
969 /*FIXME pre-rename, should eventually be LUSTRE_MDT_NAME*/
970 type = class_search_type(LUSTRE_MDS_NAME);
972 /* if this was an OST, and there are no more OST's, clean up the OSS */
973 if ((lddflags & LDD_F_SV_TYPE_OST) &&
974 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
975 type = class_search_type(LUSTRE_OST_NAME);
978 if (obd && (!type || !type->typ_refcnt)) {
981 /* obd_fail doesn't mean much on a server obd */
982 err = class_manual_cleanup(obd);
987 cfs_mutex_unlock(&server_start_lock);
992 int server_mti_print(char *title, struct mgs_target_info *mti)
994 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
995 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
996 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
997 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
998 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
999 mti->mti_config_ver, mti->mti_flags);
1003 static int server_sb2mti(struct super_block *sb, struct mgs_target_info *mti)
1005 struct lustre_sb_info *lsi = s2lsi(sb);
1006 struct lustre_disk_data *ldd = lsi->lsi_ldd;
1007 lnet_process_id_t id;
1011 if (!(lsi->lsi_flags & LSI_SERVER))
1014 strncpy(mti->mti_fsname, ldd->ldd_fsname,
1015 sizeof(mti->mti_fsname));
1016 strncpy(mti->mti_svname, ldd->ldd_svname,
1017 sizeof(mti->mti_svname));
1019 mti->mti_nid_count = 0;
1020 while (LNetGetId(i++, &id) != -ENOENT) {
1021 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1024 /* server use --servicenode param, only allow specified
1025 * nids be registered */
1026 if ((ldd->ldd_flags & LDD_F_NO_PRIMNODE) != 0 &&
1027 class_match_nid(ldd->ldd_params,
1028 PARAM_FAILNODE, id.nid) < 1)
1031 /* match specified network */
1032 if (!class_match_net(ldd->ldd_params,
1033 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1036 mti->mti_nids[mti->mti_nid_count] = id.nid;
1037 mti->mti_nid_count++;
1038 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1039 CWARN("Only using first %d nids for %s\n",
1040 mti->mti_nid_count, mti->mti_svname);
1045 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1046 mti->mti_config_ver = 0;
1047 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF)
1048 ldd->ldd_flags |= LDD_F_WRITECONF;
1049 mti->mti_flags = ldd->ldd_flags;
1050 mti->mti_stripe_index = ldd->ldd_svindex;
1051 memcpy(mti->mti_uuid, ldd->ldd_uuid, sizeof(mti->mti_uuid));
1052 if (strlen(ldd->ldd_params) > sizeof(mti->mti_params)) {
1053 CERROR("params too big for mti\n");
1056 memcpy(mti->mti_params, ldd->ldd_params, sizeof(mti->mti_params));
1060 /* Register an old or new target with the MGS. If needed MGS will construct
1061 startup logs and assign index */
1062 int server_register_target(struct super_block *sb)
1064 struct lustre_sb_info *lsi = s2lsi(sb);
1065 struct obd_device *mgc = lsi->lsi_mgc;
1066 struct lustre_disk_data *ldd = lsi->lsi_ldd;
1067 struct mgs_target_info *mti = NULL;
1074 if (!(lsi->lsi_flags & LSI_SERVER))
1080 rc = server_sb2mti(sb, mti);
1084 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1085 mti->mti_svname, mti->mti_fsname,
1086 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1089 /* if write_conf is true, the registration must succeed */
1090 writeconf = !!(ldd->ldd_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1091 mti->mti_flags |= LDD_F_OPC_REG;
1093 /* Register the target */
1094 /* FIXME use mgc_process_config instead */
1095 rc = obd_set_info_async(mgc->u.cli.cl_mgc_mgsexp,
1096 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1097 sizeof(*mti), mti, NULL);
1099 if (mti->mti_flags & LDD_F_ERROR) {
1100 LCONSOLE_ERROR_MSG(0x160,
1101 "The MGS is refusing to allow this "
1102 "server (%s) to start. Please see messages"
1103 " on the MGS node.\n", ldd->ldd_svname);
1104 } else if (writeconf) {
1105 LCONSOLE_ERROR_MSG(0x15f,
1106 "Communication to the MGS return error %d. "
1107 "Is the MGS running?\n", rc);
1109 CERROR("Cannot talk to the MGS: %d, not fatal\n", rc);
1110 /* reset the error code for non-fatal error. */
1116 /* Always update our flags */
1117 ldd->ldd_flags = mti->mti_flags & LDD_F_ONDISK_MASK;
1119 /* If this flag is set, it means the MGS wants us to change our
1120 on-disk data. (So far this means just the index.) */
1121 if (mti->mti_flags & LDD_F_REWRITE_LDD) {
1124 CDEBUG(D_MOUNT, "Changing on-disk index from %#x to %#x "
1125 "for %s\n", ldd->ldd_svindex, mti->mti_stripe_index,
1127 ldd->ldd_svindex = mti->mti_stripe_index;
1128 strncpy(ldd->ldd_svname, mti->mti_svname,
1129 sizeof(ldd->ldd_svname));
1130 /* or ldd_make_sv_name(ldd); */
1131 ldd_write(&mgc->obd_lvfs_ctxt, ldd);
1132 err = fsfilt_set_label(mgc, lsi->lsi_srv_mnt->mnt_sb,
1135 CERROR("Label set error %d\n", err);
1136 label = fsfilt_get_label(mgc, lsi->lsi_srv_mnt->mnt_sb);
1138 CDEBUG(D_MOUNT, "Disk label changed to %s\n", label);
1140 /* Flush the new ldd to disk */
1141 fsfilt_sync(mgc, lsi->lsi_srv_mnt->mnt_sb);
1151 * Notify the MGS that this target is ready.
1152 * Used by IR - if the MGS receives this message, it will notify clients.
1154 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1156 struct lustre_sb_info *lsi = s2lsi(sb);
1157 struct obd_device *mgc = lsi->lsi_mgc;
1158 struct mgs_target_info *mti = NULL;
1164 if (!(lsi->lsi_flags & LSI_SERVER))
1170 rc = server_sb2mti(sb, mti);
1174 mti->mti_instance = obd->u.obt.obt_instance;
1175 mti->mti_flags |= LDD_F_OPC_READY;
1177 /* FIXME use mgc_process_config instead */
1178 rc = obd_set_info_async(mgc->u.cli.cl_mgc_mgsexp,
1179 sizeof(KEY_REGISTER_TARGET),
1180 KEY_REGISTER_TARGET,
1181 sizeof(*mti), mti, NULL);
1183 /* Imperative recovery: if the mgs informs us to use IR? */
1184 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1185 (mti->mti_flags & LDD_F_IR_CAPABLE))
1186 lsi->lsi_flags |= LSI_IR_CAPABLE;
1195 /** Start server targets: MDTs and OSTs
1197 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1199 struct obd_device *obd;
1200 struct lustre_sb_info *lsi = s2lsi(sb);
1201 struct config_llog_instance cfg;
1205 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_ldd->ldd_svname);
1208 /* If we're an MDT, make sure the global MDS is running */
1209 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_MDT) {
1210 /* make sure the MDS is started */
1211 cfs_mutex_lock(&server_start_lock);
1212 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1214 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1215 /* FIXME pre-rename, should eventually be LUSTRE_MDS_NAME */
1217 LUSTRE_MDS_OBDNAME"_uuid",
1220 cfs_mutex_unlock(&server_start_lock);
1221 CERROR("failed to start MDS: %d\n", rc);
1225 cfs_mutex_unlock(&server_start_lock);
1229 /* If we're an OST, make sure the global OSS is running */
1230 if (IS_OST(lsi->lsi_ldd)) {
1231 /* make sure OSS is started */
1232 cfs_mutex_lock(&server_start_lock);
1233 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1235 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1237 LUSTRE_OSS_OBDNAME"_uuid",
1240 cfs_mutex_unlock(&server_start_lock);
1241 CERROR("failed to start OSS: %d\n", rc);
1245 cfs_mutex_unlock(&server_start_lock);
1248 /* Set the mgc fs to our server disk. This allows the MGC to
1249 * read and write configs locally, in case it can't talk to the MGS. */
1250 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1254 /* Register with MGS */
1255 rc = server_register_target(sb);
1259 /* Let the target look up the mount using the target's name
1260 (we can't pass the sb or mnt through class_process_config.) */
1261 rc = server_register_mount(lsi->lsi_ldd->ldd_svname, sb, mnt);
1265 /* Start targets using the llog named for the target */
1266 memset(&cfg, 0, sizeof(cfg));
1267 rc = lustre_process_log(sb, lsi->lsi_ldd->ldd_svname, &cfg);
1269 CERROR("failed to start server %s: %d\n",
1270 lsi->lsi_ldd->ldd_svname, rc);
1271 /* Do NOT call server_deregister_mount() here. This makes it
1272 * impossible to find mount later in cleanup time and leaves
1273 * @lsi and othder stuff leaked. -umka */
1278 /* Release the mgc fs for others to use */
1279 server_mgc_clear_fs(lsi->lsi_mgc);
1282 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1284 CERROR("no server named %s was started\n",
1285 lsi->lsi_ldd->ldd_svname);
1289 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1290 (OBP(obd, iocontrol))) {
1291 obd_iocontrol(OBD_IOC_ABORT_RECOVERY,
1292 obd->obd_self_export, 0, NULL, NULL);
1295 server_notify_target(sb, obd);
1297 /* calculate recovery timeout, do it after lustre_process_log */
1298 server_calc_timeout(lsi, obd);
1300 /* log has been fully processed */
1301 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1307 /***************** lustre superblock **************/
1309 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1311 struct lustre_sb_info *lsi;
1317 OBD_ALLOC_PTR(lsi->lsi_lmd);
1318 if (!lsi->lsi_lmd) {
1323 lsi->lsi_lmd->lmd_exclude_count = 0;
1324 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1325 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1326 s2lsi_nocast(sb) = lsi;
1327 /* we take 1 extra ref for our setup */
1328 cfs_atomic_set(&lsi->lsi_mounts, 1);
1330 /* Default umount style */
1331 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1336 static int lustre_free_lsi(struct super_block *sb)
1338 struct lustre_sb_info *lsi = s2lsi(sb);
1341 LASSERT(lsi != NULL);
1342 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1344 /* someone didn't call server_put_mount. */
1345 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1347 if (lsi->lsi_ldd != NULL)
1348 OBD_FREE(lsi->lsi_ldd, sizeof(*lsi->lsi_ldd));
1350 if (lsi->lsi_lmd != NULL) {
1351 if (lsi->lsi_lmd->lmd_dev != NULL)
1352 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1353 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1354 if (lsi->lsi_lmd->lmd_profile != NULL)
1355 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1356 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1357 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1358 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1359 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1360 if (lsi->lsi_lmd->lmd_opts != NULL)
1361 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1362 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1363 if (lsi->lsi_lmd->lmd_exclude_count)
1364 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1365 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1366 lsi->lsi_lmd->lmd_exclude_count);
1367 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1370 LASSERT(lsi->lsi_llsbi == NULL);
1371 OBD_FREE(lsi, sizeof(*lsi));
1372 s2lsi_nocast(sb) = NULL;
1377 /* The lsi has one reference for every server that is using the disk -
1378 e.g. MDT, MGS, and potentially MGC */
1379 static int lustre_put_lsi(struct super_block *sb)
1381 struct lustre_sb_info *lsi = s2lsi(sb);
1384 LASSERT(lsi != NULL);
1386 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
1387 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
1388 lustre_free_lsi(sb);
1394 /*************** server mount ******************/
1396 /** Kernel mount using mount options in MOUNT_DATA_FILE.
1397 * Since this file lives on the disk, we pre-mount using a common
1398 * type, read the file, then re-mount using the type specified in the
1401 static struct vfsmount *server_kernel_mount(struct super_block *sb)
1403 struct lvfs_run_ctxt mount_ctxt;
1404 struct lustre_sb_info *lsi = s2lsi(sb);
1405 struct lustre_disk_data *ldd;
1406 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1407 struct vfsmount *mnt;
1408 struct file_system_type *type;
1409 char *options = NULL;
1410 unsigned long page, s_flags;
1411 struct page *__page;
1416 OBD_ALLOC(ldd, sizeof(*ldd));
1418 RETURN(ERR_PTR(-ENOMEM));
1420 /* In the past, we have always used flags = 0.
1421 Note ext3/ldiskfs can't be mounted ro. */
1422 s_flags = sb->s_flags;
1424 /* allocate memory for options */
1425 OBD_PAGE_ALLOC(__page, CFS_ALLOC_STD);
1427 GOTO(out_free, rc = -ENOMEM);
1428 page = (unsigned long)cfs_page_address(__page);
1429 options = (char *)page;
1430 memset(options, 0, CFS_PAGE_SIZE);
1432 /* mount-line options must be added for pre-mount because it may
1433 * contain mount options such as journal_dev which are required
1434 * to mount successfuly the underlying filesystem */
1435 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0))
1436 strncat(options, lmd->lmd_opts, CFS_PAGE_SIZE - 1);
1438 /* Pre-mount ldiskfs to read the MOUNT_DATA_FILE */
1439 CDEBUG(D_MOUNT, "Pre-mount ldiskfs %s\n", lmd->lmd_dev);
1440 type = get_fs_type("ldiskfs");
1442 CERROR("premount failed: cannot find ldiskfs module\n");
1443 GOTO(out_free, rc = -ENODEV);
1445 mnt = vfs_kern_mount(type, s_flags, lmd->lmd_dev, (void *)options);
1446 cfs_module_put(type->owner);
1449 CERROR("premount %s:%#lx ldiskfs failed: %d "
1450 "Is the ldiskfs module available?\n",
1451 lmd->lmd_dev, s_flags, rc );
1455 OBD_SET_CTXT_MAGIC(&mount_ctxt);
1456 mount_ctxt.pwdmnt = mnt;
1457 mount_ctxt.pwd = mnt->mnt_root;
1458 mount_ctxt.fs = get_ds();
1460 rc = ldd_parse(&mount_ctxt, ldd);
1464 CERROR("premount parse options failed: rc = %d\n", rc);
1468 /* Done with our pre-mount, now do the real mount. */
1470 /* Glom up mount options */
1471 memset(options, 0, CFS_PAGE_SIZE);
1472 strncpy(options, ldd->ldd_mount_opts, CFS_PAGE_SIZE - 2);
1474 len = CFS_PAGE_SIZE - strlen(options) - 2;
1476 strcat(options, ",");
1477 strncat(options, "no_mbcache", len);
1479 /* Add in any mount-line options */
1480 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0)) {
1481 len = CFS_PAGE_SIZE - strlen(options) - 2;
1482 strcat(options, ",");
1483 strncat(options, lmd->lmd_opts, len);
1486 /* Special permanent mount flags */
1488 s_flags |= MS_NOATIME | MS_NODIRATIME;
1490 CDEBUG(D_MOUNT, "kern_mount: %s %s %s\n",
1491 MT_STR(ldd), lmd->lmd_dev, options);
1492 type = get_fs_type(MT_STR(ldd));
1494 CERROR("get_fs_type failed\n");
1495 GOTO(out_free, rc = -ENODEV);
1497 mnt = vfs_kern_mount(type, s_flags, lmd->lmd_dev, (void *)options);
1498 cfs_module_put(type->owner);
1501 CERROR("vfs_kern_mount failed: rc = %d\n", rc);
1505 if (lmd->lmd_flags & LMD_FLG_ABORT_RECOV)
1506 simple_truncate(mnt->mnt_sb->s_root, mnt, LAST_RCVD,
1509 OBD_PAGE_FREE(__page);
1510 lsi->lsi_ldd = ldd; /* freed at lsi cleanup */
1511 CDEBUG(D_SUPER, "%s: mnt = %p\n", lmd->lmd_dev, mnt);
1516 OBD_PAGE_FREE(__page);
1517 OBD_FREE(ldd, sizeof(*ldd));
1518 lsi->lsi_ldd = NULL;
1519 RETURN(ERR_PTR(rc));
1522 /** Wait here forever until the mount refcount is 0 before completing umount,
1523 * else we risk dereferencing a null pointer.
1524 * LNET may take e.g. 165s before killing zombies.
1526 static void server_wait_finished(struct vfsmount *mnt)
1530 cfs_sigset_t blocked;
1532 cfs_waitq_init(&waitq);
1534 while (mnt_get_count(mnt) > 1) {
1535 if (waited && (waited % 30 == 0))
1536 LCONSOLE_WARN("Mount still busy with %d refs after "
1540 /* Cannot use l_event_wait() for an interruptible sleep. */
1542 blocked = cfs_block_sigsinv(sigmask(SIGKILL));
1543 cfs_waitq_wait_event_interruptible_timeout(
1545 (mnt_get_count(mnt) == 1),
1546 cfs_time_seconds(3),
1548 cfs_block_sigs(blocked);
1550 LCONSOLE_EMERG("Danger: interrupted umount %s with "
1551 "%d refs!\n", mnt->mnt_devname,
1552 mnt_get_count(mnt));
1559 /** Start the shutdown of servers at umount.
1561 static void server_put_super(struct super_block *sb)
1563 struct lustre_sb_info *lsi = s2lsi(sb);
1564 struct obd_device *obd;
1565 struct vfsmount *mnt = lsi->lsi_srv_mnt;
1566 char *tmpname, *extraname = NULL;
1568 int lddflags = lsi->lsi_ldd->ldd_flags;
1569 int lsiflags = lsi->lsi_flags;
1572 LASSERT(lsiflags & LSI_SERVER);
1574 tmpname_sz = strlen(lsi->lsi_ldd->ldd_svname) + 1;
1575 OBD_ALLOC(tmpname, tmpname_sz);
1576 memcpy(tmpname, lsi->lsi_ldd->ldd_svname, tmpname_sz);
1577 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1578 if (IS_MDT(lsi->lsi_ldd) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1579 snprintf(tmpname, tmpname_sz, "MGS");
1581 /* Stop the target */
1582 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1583 (IS_MDT(lsi->lsi_ldd) || IS_OST(lsi->lsi_ldd))) {
1584 struct lustre_profile *lprof = NULL;
1586 /* tell the mgc to drop the config log */
1587 lustre_end_log(sb, lsi->lsi_ldd->ldd_svname, NULL);
1589 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1590 If there are any setup/cleanup errors, save the lov
1591 name for safety cleanup later. */
1592 lprof = class_get_profile(lsi->lsi_ldd->ldd_svname);
1593 if (lprof && lprof->lp_dt) {
1594 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1595 strcpy(extraname, lprof->lp_dt);
1598 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1600 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1601 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
1603 /* We can't seem to give an error return code
1604 * to .put_super, so we better make sure we clean up! */
1606 class_manual_cleanup(obd);
1608 CERROR("no obd %s\n", lsi->lsi_ldd->ldd_svname);
1609 server_deregister_mount(lsi->lsi_ldd->ldd_svname);
1613 /* If they wanted the mgs to stop separately from the mdt, they
1614 should have put it on a different device. */
1615 if (IS_MGS(lsi->lsi_ldd)) {
1616 /* if MDS start with --nomgs, don't stop MGS then */
1617 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) {
1620 OBD_ALLOC(logname, MGS_PARAM_MAXLEN);
1622 LCONSOLE_WARN("Stopping mgs failed %d, please "
1623 "try again.", -ENOMEM);
1626 strcpy(logname, lsi->lsi_ldd->ldd_fsname);
1627 strcat(logname, "-params");
1628 /* tell the mgc to drop parameter config log */
1629 lustre_end_log(sb, logname, NULL);
1630 OBD_FREE(logname, MGS_PARAM_MAXLEN);
1632 server_stop_mgs(sb);
1636 /* Clean the mgc and sb */
1637 lustre_common_put_super(sb);
1639 /* Wait for the targets to really clean up - can't exit (and let the
1640 sb get destroyed) while the mount is still in use */
1641 server_wait_finished(mnt);
1643 /* drop the One True Mount */
1646 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1647 until the target is really gone so that our type refcount check
1649 server_stop_servers(lddflags, lsiflags);
1651 /* In case of startup or cleanup err, stop related obds */
1653 obd = class_name2obd(extraname);
1655 CWARN("Cleaning orphaned obd %s\n", extraname);
1657 class_manual_cleanup(obd);
1659 OBD_FREE(extraname, strlen(extraname) + 1);
1662 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1663 OBD_FREE(tmpname, tmpname_sz);
1667 /** Called only for 'umount -f'
1669 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1670 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
1672 struct super_block *sb = vfsmnt->mnt_sb;
1674 static void server_umount_begin(struct super_block *sb)
1677 struct lustre_sb_info *lsi = s2lsi(sb);
1680 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1681 if (!(flags & MNT_FORCE)) {
1687 CDEBUG(D_MOUNT, "umount -f\n");
1688 /* umount = failover
1690 no third way to do non-force, non-failover */
1691 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1692 lsi->lsi_flags |= LSI_UMOUNT_FORCE;
1696 #ifndef HAVE_STATFS_DENTRY_PARAM
1697 static int server_statfs (struct super_block *sb, cfs_kstatfs_t *buf)
1700 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
1702 struct super_block *sb = dentry->d_sb;
1704 struct vfsmount *mnt = s2lsi(sb)->lsi_srv_mnt;
1707 if (mnt && mnt->mnt_sb && mnt->mnt_sb->s_op->statfs) {
1708 #ifdef HAVE_STATFS_DENTRY_PARAM
1709 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_root, buf);
1711 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_sb, buf);
1714 buf->f_type = sb->s_magic;
1720 buf->f_type = sb->s_magic;
1721 buf->f_bsize = sb->s_blocksize;
1727 buf->f_namelen = NAME_MAX;
1731 /** The operations we support directly on the superblock:
1732 * mount, umount, and df.
1734 static struct super_operations server_ops =
1736 .put_super = server_put_super,
1737 .umount_begin = server_umount_begin, /* umount -f */
1738 .statfs = server_statfs,
1741 #define log2(n) cfs_ffz(~(n))
1742 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1744 static int server_fill_super_common(struct super_block *sb)
1746 struct inode *root = 0;
1749 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1751 sb->s_blocksize = 4096;
1752 sb->s_blocksize_bits = log2(sb->s_blocksize);
1753 sb->s_magic = LUSTRE_SUPER_MAGIC;
1754 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
1755 sb->s_flags |= MS_RDONLY;
1756 sb->s_op = &server_ops;
1758 root = new_inode(sb);
1760 CERROR("Can't make root inode\n");
1764 /* returns -EIO for every operation */
1765 /* make_bad_inode(root); -- badness - can't umount */
1766 /* apparently we need to be a directory for the mount to finish */
1767 root->i_mode = S_IFDIR;
1769 sb->s_root = d_alloc_root(root);
1771 CERROR("Can't make root dentry\n");
1779 /** Fill in the superblock info for a Lustre server.
1780 * Mount the device with the correct options.
1781 * Read the on-disk config file.
1782 * Start the services.
1784 static int server_fill_super(struct super_block *sb)
1786 struct lustre_sb_info *lsi = s2lsi(sb);
1787 struct vfsmount *mnt;
1791 /* the One True Mount */
1792 mnt = server_kernel_mount(sb);
1795 CERROR("Unable to mount device %s: %d\n",
1796 lsi->lsi_lmd->lmd_dev, rc);
1800 lsi->lsi_srv_mnt = mnt;
1802 LASSERT(lsi->lsi_ldd);
1803 CDEBUG(D_MOUNT, "Found service %s for fs '%s' on device %s\n",
1804 lsi->lsi_ldd->ldd_svname, lsi->lsi_ldd->ldd_fsname,
1805 lsi->lsi_lmd->lmd_dev);
1807 if (class_name2obd(lsi->lsi_ldd->ldd_svname)) {
1808 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1809 "running. Double-mount may have compromised"
1810 " the disk journal.\n",
1811 lsi->lsi_ldd->ldd_svname);
1817 /* Start MGS before MGC */
1818 if (IS_MGS(lsi->lsi_ldd) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
1819 rc = server_start_mgs(sb);
1824 /* Start MGC before servers */
1825 rc = lustre_start_mgc(sb);
1829 /* Set up all obd devices for service */
1830 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1831 (IS_OST(lsi->lsi_ldd) || IS_MDT(lsi->lsi_ldd))) {
1832 rc = server_start_targets(sb, mnt);
1834 CERROR("Unable to start targets: %d\n", rc);
1837 /* FIXME overmount client here,
1838 or can we just start a client log and client_fill_super on this sb?
1839 We need to make sure server_put_super gets called too - ll_put_super
1840 calls lustre_common_put_super; check there for LSI_SERVER flag,
1842 Probably should start client from new thread so we can return.
1843 Client will not finish until all servers are connected.
1844 Note - MGS-only server does NOT get a client, since there is no
1845 lustre fs associated - the MGS is for all lustre fs's */
1846 } else if (IS_MGS(lsi->lsi_ldd) &&
1847 !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
1848 struct config_llog_instance cfg;
1851 OBD_ALLOC(logname, MGS_PARAM_MAXLEN);
1852 if (logname == NULL)
1853 GOTO(out_mnt, rc = -ENOMEM);
1854 strcpy(logname, lsi->lsi_ldd->ldd_fsname);
1855 strcat(logname, "-params");
1857 memset(&cfg, 0, sizeof(cfg));
1858 rc = lustre_process_log(sb, logname, &cfg);
1859 OBD_FREE(logname, MGS_PARAM_MAXLEN);
1861 CERROR("failed to process parameters %s: %d\n",
1867 rc = server_fill_super_common(sb);
1873 /* We jump here in case of failure while starting targets or MGS.
1874 * In this case we can't just put @mnt and have to do real cleanup
1875 * with stoping targets, etc. */
1876 server_put_super(sb);
1880 /* Get the index from the obd name.
1881 rc = server type, or
1883 if endptr isn't NULL it is set to end of name */
1884 int server_name2index(char *svname, __u32 *idx, char **endptr)
1886 unsigned long index;
1888 char *dash = strrchr(svname, '-');
1892 /* intepret <fsname>-MDTXXXXX-mdc as mdt, the better way is to pass
1893 * in the fsname, then determine the server index */
1894 if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) {
1896 for (; dash > svname && *dash != '-'; dash--);
1901 if (strncmp(dash + 1, "MDT", 3) == 0)
1902 rc = LDD_F_SV_TYPE_MDT;
1903 else if (strncmp(dash + 1, "OST", 3) == 0)
1904 rc = LDD_F_SV_TYPE_OST;
1907 if (strcmp(dash + 4, "all") == 0)
1908 return rc | LDD_F_SV_ALL;
1910 index = simple_strtoul(dash + 4, endptr, 16);
1916 * Calculate timeout value for a target.
1918 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
1920 struct lustre_mount_data *lmd;
1924 bool has_ir = !!(lsi->lsi_flags & LSI_IR_CAPABLE);
1925 int min = OBD_RECOVERY_TIME_MIN;
1927 LASSERT(lsi->lsi_flags & LSI_SERVER);
1931 soft = lmd->lmd_recovery_time_soft;
1932 hard = lmd->lmd_recovery_time_hard;
1933 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
1934 obd->obd_no_ir = !has_ir;
1938 soft = OBD_RECOVERY_TIME_SOFT;
1940 hard = OBD_RECOVERY_TIME_HARD;
1942 /* target may have ir_factor configured. */
1943 factor = OBD_IR_FACTOR_DEFAULT;
1944 if (obd->obd_recovery_ir_factor)
1945 factor = obd->obd_recovery_ir_factor;
1948 int new_soft = soft;
1949 int new_hard = hard;
1951 /* adjust timeout value by imperative recovery */
1953 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
1954 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
1956 /* make sure the timeout is not too short */
1957 new_soft = max(min, new_soft);
1958 new_hard = max(new_soft, new_hard);
1960 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
1961 "window shrunk from %d-%d down to %d-%d\n",
1962 obd->obd_name, soft, hard, new_soft, new_hard);
1969 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
1970 obd->obd_recovery_time_hard = hard;
1971 obd->obd_recovery_ir_factor = factor;
1973 EXPORT_SYMBOL(server_calc_timeout);
1975 /*************** mount common betweeen server and client ***************/
1978 int lustre_common_put_super(struct super_block *sb)
1983 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
1985 /* Drop a ref to the MGC */
1986 rc = lustre_stop_mgc(sb);
1987 if (rc && (rc != -ENOENT)) {
1989 CERROR("Can't stop MGC: %d\n", rc);
1992 /* BUSY just means that there's some other obd that
1993 needs the mgc. Let him clean it up. */
1994 CDEBUG(D_MOUNT, "MGC still in use\n");
1996 /* Drop a ref to the mounted disk */
2002 static void lmd_print(struct lustre_mount_data *lmd)
2006 PRINT_CMD(PRINT_MASK, " mount data:\n");
2007 if (lmd_is_client(lmd))
2008 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
2009 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
2010 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
2013 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
2015 if (lmd->lmd_recovery_time_soft)
2016 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
2017 lmd->lmd_recovery_time_soft);
2019 if (lmd->lmd_recovery_time_hard)
2020 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
2021 lmd->lmd_recovery_time_hard);
2023 for (i = 0; i < lmd->lmd_exclude_count; i++) {
2024 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
2025 lmd->lmd_exclude[i]);
2029 /* Is this server on the exclusion list */
2030 int lustre_check_exclusion(struct super_block *sb, char *svname)
2032 struct lustre_sb_info *lsi = s2lsi(sb);
2033 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2038 rc = server_name2index(svname, &index, NULL);
2039 if (rc != LDD_F_SV_TYPE_OST)
2040 /* Only exclude OSTs */
2043 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
2044 index, lmd->lmd_exclude_count, lmd->lmd_dev);
2046 for(i = 0; i < lmd->lmd_exclude_count; i++) {
2047 if (index == lmd->lmd_exclude[i]) {
2048 CWARN("Excluding %s (on exclusion list)\n", svname);
2055 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
2056 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
2058 char *s1 = ptr, *s2;
2059 __u32 index, *exclude_list;
2063 /* The shortest an ost name can be is 8 chars: -OST0000.
2064 We don't actually know the fsname at this time, so in fact
2065 a user could specify any fsname. */
2066 devmax = strlen(ptr) / 8 + 1;
2068 /* temp storage until we figure out how many we have */
2069 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
2073 /* we enter this fn pointing at the '=' */
2074 while (*s1 && *s1 != ' ' && *s1 != ',') {
2076 rc = server_name2index(s1, &index, &s2);
2078 CERROR("Can't parse server name '%s'\n", s1);
2081 if (rc == LDD_F_SV_TYPE_OST)
2082 exclude_list[lmd->lmd_exclude_count++] = index;
2084 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
2086 /* now we are pointing at ':' (next exclude)
2087 or ',' (end of excludes) */
2088 if (lmd->lmd_exclude_count >= devmax)
2091 if (rc >= 0) /* non-err */
2094 if (lmd->lmd_exclude_count) {
2095 /* permanent, freed in lustre_free_lsi */
2096 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
2097 lmd->lmd_exclude_count);
2098 if (lmd->lmd_exclude) {
2099 memcpy(lmd->lmd_exclude, exclude_list,
2100 sizeof(index) * lmd->lmd_exclude_count);
2103 lmd->lmd_exclude_count = 0;
2106 OBD_FREE(exclude_list, sizeof(index) * devmax);
2110 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
2115 if (lmd->lmd_mgssec != NULL) {
2116 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
2117 lmd->lmd_mgssec = NULL;
2120 tail = strchr(ptr, ',');
2122 length = strlen(ptr);
2124 length = tail - ptr;
2126 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
2127 if (lmd->lmd_mgssec == NULL)
2130 memcpy(lmd->lmd_mgssec, ptr, length);
2131 lmd->lmd_mgssec[length] = '\0';
2135 /** Parse mount line options
2136 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
2137 * dev is passed as device=uml1:/lustre by mount.lustre
2139 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
2141 char *s1, *s2, *devname = NULL;
2142 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
2148 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
2149 "/sbin/mount.lustre is installed.\n");
2153 /* Options should be a string - try to detect old lmd data */
2154 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
2155 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
2156 "/sbin/mount.lustre. Please install "
2157 "version %s\n", LUSTRE_VERSION_STRING);
2160 lmd->lmd_magic = LMD_MAGIC;
2162 /* Set default flags here */
2167 int time_min = OBD_RECOVERY_TIME_MIN;
2169 /* Skip whitespace and extra commas */
2170 while (*s1 == ' ' || *s1 == ',')
2173 /* Client options are parsed in ll_options: eg. flock,
2176 /* Parse non-ldiskfs options here. Rather than modifying
2177 ldiskfs, we just zero these out here */
2178 if (strncmp(s1, "abort_recov", 11) == 0) {
2179 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
2181 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
2182 lmd->lmd_recovery_time_soft = max_t(int,
2183 simple_strtoul(s1 + 19, NULL, 10), time_min);
2185 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
2186 lmd->lmd_recovery_time_hard = max_t(int,
2187 simple_strtoul(s1 + 19, NULL, 10), time_min);
2189 } else if (strncmp(s1, "noir", 4) == 0) {
2190 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
2192 } else if (strncmp(s1, "nosvc", 5) == 0) {
2193 lmd->lmd_flags |= LMD_FLG_NOSVC;
2195 } else if (strncmp(s1, "nomgs", 5) == 0) {
2196 lmd->lmd_flags |= LMD_FLG_NOMGS;
2198 } else if (strncmp(s1, "writeconf", 9) == 0) {
2199 lmd->lmd_flags |= LMD_FLG_WRITECONF;
2201 } else if (strncmp(s1, "mgssec=", 7) == 0) {
2202 rc = lmd_parse_mgssec(lmd, s1 + 7);
2206 /* ost exclusion list */
2207 } else if (strncmp(s1, "exclude=", 8) == 0) {
2208 rc = lmd_make_exclusion(lmd, s1 + 7);
2213 /* Linux 2.4 doesn't pass the device, so we stuck it at the
2214 end of the options. */
2215 else if (strncmp(s1, "device=", 7) == 0) {
2217 /* terminate options right before device. device
2218 must be the last one. */
2224 s2 = strchr(s1, ',');
2232 memmove(s1, s2, strlen(s2) + 1);
2238 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2239 "(need mount option 'device=...')\n");
2243 s1 = strstr(devname, ":/");
2246 lmd->lmd_flags |= LMD_FLG_CLIENT;
2247 /* Remove leading /s from fsname */
2248 while (*++s1 == '/') ;
2249 /* Freed in lustre_free_lsi */
2250 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2251 if (!lmd->lmd_profile)
2253 sprintf(lmd->lmd_profile, "%s-client", s1);
2256 /* Freed in lustre_free_lsi */
2257 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2260 strcpy(lmd->lmd_dev, devname);
2262 /* Save mount options */
2263 s1 = options + strlen(options) - 1;
2264 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2266 if (*options != 0) {
2267 /* Freed in lustre_free_lsi */
2268 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2271 strcpy(lmd->lmd_opts, options);
2275 lmd->lmd_magic = LMD_MAGIC;
2280 CERROR("Bad mount options %s\n", options);
2284 struct lustre_mount_data2 {
2286 struct vfsmount *lmd2_mnt;
2289 /** This is the entry point for the mount call into Lustre.
2290 * This is called when a server or client is mounted,
2291 * and this is where we start setting things up.
2292 * @param data Mount options (e.g. -o flock,abort_recov)
2294 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2296 struct lustre_mount_data *lmd;
2297 struct lustre_mount_data2 *lmd2 = data;
2298 struct lustre_sb_info *lsi;
2302 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2304 lsi = lustre_init_lsi(sb);
2310 * Disable lockdep during mount, because mount locking patterns are
2316 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
2318 obd_zombie_barrier();
2320 /* Figure out the lmd from the mount options */
2321 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
2323 GOTO(out, rc = -EINVAL);
2326 if (lmd_is_client(lmd)) {
2327 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2328 if (!client_fill_super) {
2329 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2330 "client mount! Is the 'lustre' "
2331 "module loaded?\n");
2335 rc = lustre_start_mgc(sb);
2340 /* Connect and start */
2341 /* (should always be ll_fill_super) */
2342 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
2343 /* c_f_s will call lustre_common_put_super on failure */
2346 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2347 lsi->lsi_flags |= LSI_SERVER;
2348 rc = server_fill_super(sb);
2349 /* s_f_s calls lustre_start_mgc after the mount because we need
2350 the MGS nids which are stored on disk. Plus, we may
2351 need to start the MGS first. */
2352 /* s_f_s will call server_put_super on failure */
2355 /* If error happens in fill_super() call, @lsi will be killed there.
2356 * This is why we do not put it here. */
2360 CERROR("Unable to mount %s (%d)\n",
2361 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2363 CDEBUG(D_SUPER, "Mount %s complete\n",
2371 /* We can't call ll_fill_super by name because it lives in a module that
2372 must be loaded after this one. */
2373 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
2374 struct vfsmount *mnt))
2376 client_fill_super = cfs;
2379 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
2381 kill_super_cb = cfs;
2384 /***************** FS registration ******************/
2386 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
2387 struct super_block * lustre_get_sb(struct file_system_type *fs_type, int flags,
2388 const char *devname, void * data)
2390 return get_sb_nodev(fs_type, flags, data, lustre_fill_super);
2393 int lustre_get_sb(struct file_system_type *fs_type, int flags,
2394 const char *devname, void * data, struct vfsmount *mnt)
2396 struct lustre_mount_data2 lmd2 = {data, mnt};
2398 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
2402 void lustre_kill_super(struct super_block *sb)
2404 struct lustre_sb_info *lsi = s2lsi(sb);
2406 if (kill_super_cb && lsi && !(lsi->lsi_flags & LSI_SERVER))
2407 (*kill_super_cb)(sb);
2409 kill_anon_super(sb);
2412 /** Register the "lustre" fs type
2414 struct file_system_type lustre_fs_type = {
2415 .owner = THIS_MODULE,
2417 .get_sb = lustre_get_sb,
2418 .kill_sb = lustre_kill_super,
2419 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
2420 #ifdef FS_HAS_FIEMAP
2423 LL_RENAME_DOES_D_MOVE,
2426 int lustre_register_fs(void)
2428 return register_filesystem(&lustre_fs_type);
2431 int lustre_unregister_fs(void)
2433 return unregister_filesystem(&lustre_fs_type);
2436 EXPORT_SYMBOL(lustre_register_client_fill_super);
2437 EXPORT_SYMBOL(lustre_register_kill_super_cb);
2438 EXPORT_SYMBOL(lustre_common_put_super);
2439 EXPORT_SYMBOL(lustre_process_log);
2440 EXPORT_SYMBOL(lustre_end_log);
2441 EXPORT_SYMBOL(server_get_mount);
2442 EXPORT_SYMBOL(server_get_mount_2);
2443 EXPORT_SYMBOL(server_put_mount);
2444 EXPORT_SYMBOL(server_put_mount_2);
2445 EXPORT_SYMBOL(server_register_target);
2446 EXPORT_SYMBOL(server_name2index);
2447 EXPORT_SYMBOL(server_mti_print);
2448 EXPORT_SYMBOL(do_lcfg);