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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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/server 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
47 #define PRINT_MASK D_SUPER|D_CONFIG
51 #include <lustre_fsfilt.h>
52 #include <obd_class.h>
53 #include <lustre/lustre_user.h>
54 #include <linux/version.h>
55 #include <lustre_log.h>
56 #include <lustre_disk.h>
57 #include <lustre_param.h>
59 static int (*client_fill_super)(struct super_block *sb) = NULL;
60 static void (*kill_super_cb)(struct super_block *sb) = NULL;
62 /*********** mount lookup *********/
64 CFS_DECLARE_MUTEX(lustre_mount_info_lock);
65 static CFS_LIST_HEAD(server_mount_info_list);
67 static struct lustre_mount_info *server_find_mount(const char *name)
70 struct lustre_mount_info *lmi;
73 cfs_list_for_each(tmp, &server_mount_info_list) {
74 lmi = cfs_list_entry(tmp, struct lustre_mount_info,
76 if (strcmp(name, lmi->lmi_name) == 0)
82 /* we must register an obd for a mount before we call the setup routine.
83 *_setup will call lustre_get_mount to get the mnt struct
84 by obd_name, since we can't pass the pointer to setup. */
85 static int server_register_mount(const char *name, struct super_block *sb,
88 struct lustre_mount_info *lmi;
95 OBD_ALLOC(lmi, sizeof(*lmi));
98 OBD_ALLOC(name_cp, strlen(name) + 1);
100 OBD_FREE(lmi, sizeof(*lmi));
103 strcpy(name_cp, name);
105 cfs_down(&lustre_mount_info_lock);
107 if (server_find_mount(name)) {
108 cfs_up(&lustre_mount_info_lock);
109 OBD_FREE(lmi, sizeof(*lmi));
110 OBD_FREE(name_cp, strlen(name) + 1);
111 CERROR("Already registered %s\n", name);
114 lmi->lmi_name = name_cp;
117 cfs_list_add(&lmi->lmi_list_chain, &server_mount_info_list);
119 cfs_up(&lustre_mount_info_lock);
121 CDEBUG(D_MOUNT, "reg_mnt %p from %s, vfscount=%d\n",
122 lmi->lmi_mnt, name, cfs_atomic_read(&lmi->lmi_mnt->mnt_count));
127 /* when an obd no longer needs a mount */
128 static int server_deregister_mount(const char *name)
130 struct lustre_mount_info *lmi;
133 cfs_down(&lustre_mount_info_lock);
134 lmi = server_find_mount(name);
136 cfs_up(&lustre_mount_info_lock);
137 CERROR("%s not registered\n", name);
141 CDEBUG(D_MOUNT, "dereg_mnt %p from %s, vfscount=%d\n",
142 lmi->lmi_mnt, name, cfs_atomic_read(&lmi->lmi_mnt->mnt_count));
144 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
145 cfs_list_del(&lmi->lmi_list_chain);
146 OBD_FREE(lmi, sizeof(*lmi));
147 cfs_up(&lustre_mount_info_lock);
152 /* obd's look up a registered mount using their obdname. This is just
153 for initial obd setup to find the mount struct. It should not be
154 called every time you want to mntget. */
155 struct lustre_mount_info *server_get_mount(const char *name)
157 struct lustre_mount_info *lmi;
158 struct lustre_sb_info *lsi;
161 cfs_down(&lustre_mount_info_lock);
162 lmi = server_find_mount(name);
163 cfs_up(&lustre_mount_info_lock);
165 CERROR("Can't find mount for %s\n", name);
168 lsi = s2lsi(lmi->lmi_sb);
169 mntget(lmi->lmi_mnt);
170 cfs_atomic_inc(&lsi->lsi_mounts);
172 CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d, vfscount=%d\n",
173 lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts),
174 cfs_atomic_read(&lmi->lmi_mnt->mnt_count));
180 * Used by mdt to get mount_info from obdname.
181 * There are no blocking when using the mount_info.
182 * Do not use server_get_mount for this purpose.
184 struct lustre_mount_info *server_get_mount_2(const char *name)
186 struct lustre_mount_info *lmi;
189 cfs_down(&lustre_mount_info_lock);
190 lmi = server_find_mount(name);
191 cfs_up(&lustre_mount_info_lock);
193 CERROR("Can't find mount for %s\n", name);
198 static void unlock_mntput(struct vfsmount *mnt)
200 if (kernel_locked()) {
209 static int lustre_put_lsi(struct super_block *sb);
211 /* to be called from obd_cleanup methods */
212 int server_put_mount(const char *name, struct vfsmount *mnt)
214 struct lustre_mount_info *lmi;
215 struct lustre_sb_info *lsi;
216 int count = atomic_read(&mnt->mnt_count) - 1;
219 /* This might be the last one, can't deref after this */
222 cfs_down(&lustre_mount_info_lock);
223 lmi = server_find_mount(name);
224 cfs_up(&lustre_mount_info_lock);
226 CERROR("Can't find mount for %s\n", name);
229 lsi = s2lsi(lmi->lmi_sb);
230 LASSERT(lmi->lmi_mnt == mnt);
232 CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d, vfscount=%d\n",
233 lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts), count);
235 if (lustre_put_lsi(lmi->lmi_sb)) {
236 CDEBUG(D_MOUNT, "Last put of mnt %p from %s, vfscount=%d\n",
237 lmi->lmi_mnt, name, count);
238 /* last mount is the One True Mount */
240 CERROR("%s: mount busy, vfscount=%d!\n", name, count);
243 /* this obd should never need the mount again */
244 server_deregister_mount(name);
249 /* Corresponding to server_get_mount_2 */
250 int server_put_mount_2(const char *name, struct vfsmount *mnt)
256 /******* mount helper utilities *********/
259 static void ldd_print(struct lustre_disk_data *ldd)
261 PRINT_CMD(PRINT_MASK, " disk data:\n");
262 PRINT_CMD(PRINT_MASK, "server: %s\n", ldd->ldd_svname);
263 PRINT_CMD(PRINT_MASK, "uuid: %s\n", (char *)ldd->ldd_uuid);
264 PRINT_CMD(PRINT_MASK, "fs: %s\n", ldd->ldd_fsname);
265 PRINT_CMD(PRINT_MASK, "index: %04x\n", ldd->ldd_svindex);
266 PRINT_CMD(PRINT_MASK, "config: %d\n", ldd->ldd_config_ver);
267 PRINT_CMD(PRINT_MASK, "flags: %#x\n", ldd->ldd_flags);
268 PRINT_CMD(PRINT_MASK, "diskfs: %s\n", MT_STR(ldd));
269 PRINT_CMD(PRINT_MASK, "options: %s\n", ldd->ldd_mount_opts);
270 PRINT_CMD(PRINT_MASK, "params: %s\n", ldd->ldd_params);
271 PRINT_CMD(PRINT_MASK, "comment: %s\n", ldd->ldd_userdata);
275 static int ldd_parse(struct lvfs_run_ctxt *mount_ctxt,
276 struct lustre_disk_data *ldd)
278 struct lvfs_run_ctxt saved;
285 push_ctxt(&saved, mount_ctxt, NULL);
287 file = filp_open(MOUNT_DATA_FILE, O_RDONLY, 0644);
290 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
294 len = i_size_read(file->f_dentry->d_inode);
295 CDEBUG(D_MOUNT, "Have %s, size %lu\n", MOUNT_DATA_FILE, len);
296 if (len != sizeof(*ldd)) {
297 CERROR("disk data size does not match: see %lu expect %u\n",
298 len, (int)sizeof(*ldd));
299 GOTO(out_close, rc = -EINVAL);
302 rc = lustre_fread(file, ldd, len, &off);
304 CERROR("error reading %s: read %d of %lu\n",
305 MOUNT_DATA_FILE, rc, len);
306 GOTO(out_close, rc = -EINVAL);
310 if (ldd->ldd_magic != LDD_MAGIC) {
311 /* FIXME add swabbing support */
312 CERROR("Bad magic in %s: %x!=%x\n", MOUNT_DATA_FILE,
313 ldd->ldd_magic, LDD_MAGIC);
314 GOTO(out_close, rc = -EINVAL);
317 if (ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP) {
318 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
320 ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP);
321 GOTO(out_close, rc = -EINVAL);
323 if (ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP) {
324 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
326 ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP);
327 /* Do something like remount filesystem read-only */
328 GOTO(out_close, rc = -EINVAL);
334 pop_ctxt(&saved, mount_ctxt, NULL);
338 static int ldd_write(struct lvfs_run_ctxt *mount_ctxt,
339 struct lustre_disk_data *ldd)
341 struct lvfs_run_ctxt saved;
344 unsigned long len = sizeof(struct lustre_disk_data);
348 LASSERT(ldd->ldd_magic == LDD_MAGIC);
350 ldd->ldd_config_ver++;
352 push_ctxt(&saved, mount_ctxt, NULL);
354 file = filp_open(MOUNT_DATA_FILE, O_RDWR, 0644);
357 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
361 rc = lustre_fwrite(file, ldd, len, &off);
363 CERROR("error writing %s: read %d of %lu\n",
364 MOUNT_DATA_FILE, rc, len);
365 GOTO(out_close, rc = -EINVAL);
373 pop_ctxt(&saved, mount_ctxt, NULL);
378 /**************** config llog ********************/
380 /** Get a config log from the MGS and process it.
381 * This func is called for both clients and servers.
382 * Continue to process new statements appended to the logs
383 * (whenever the config lock is revoked) until lustre_end_log
385 * @param sb The superblock is used by the MGC to write to the local copy of
387 * @param logname The name of the llog to replicate from the MGS
388 * @param cfg Since the same mgc may be used to follow multiple config logs
389 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
390 * this log, and is added to the mgc's list of logs to follow.
392 int lustre_process_log(struct super_block *sb, char *logname,
393 struct config_llog_instance *cfg)
395 struct lustre_cfg *lcfg;
396 struct lustre_cfg_bufs bufs;
397 struct lustre_sb_info *lsi = s2lsi(sb);
398 struct obd_device *mgc = lsi->lsi_mgc;
405 /* mgc_process_config */
406 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
407 lustre_cfg_bufs_set_string(&bufs, 1, logname);
408 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
409 lustre_cfg_bufs_set(&bufs, 3, &sb, sizeof(sb));
410 lcfg = lustre_cfg_new(LCFG_LOG_START, &bufs);
411 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
412 lustre_cfg_free(lcfg);
415 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
416 "failed from the MGS (%d). Make sure this "
417 "client and the MGS are running compatible "
418 "versions of Lustre.\n",
419 mgc->obd_name, logname, rc);
422 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
423 "failed (%d). This may be the result of "
424 "communication errors between this node and "
425 "the MGS, a bad configuration, or other "
426 "errors. See the syslog for more "
427 "information.\n", mgc->obd_name, logname,
430 /* class_obd_list(); */
434 /* Stop watching this config log for updates */
435 int lustre_end_log(struct super_block *sb, char *logname,
436 struct config_llog_instance *cfg)
438 struct lustre_cfg *lcfg;
439 struct lustre_cfg_bufs bufs;
440 struct lustre_sb_info *lsi = s2lsi(sb);
441 struct obd_device *mgc = lsi->lsi_mgc;
448 /* mgc_process_config */
449 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
450 lustre_cfg_bufs_set_string(&bufs, 1, logname);
452 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
453 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
454 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
455 lustre_cfg_free(lcfg);
459 /**************** obd start *******************/
461 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
462 * lctl (and do for echo cli/srv.
464 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
465 char *s1, char *s2, char *s3, char *s4)
467 struct lustre_cfg_bufs bufs;
468 struct lustre_cfg * lcfg = NULL;
471 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
472 cmd, s1, s2, s3, s4);
474 lustre_cfg_bufs_reset(&bufs, cfgname);
476 lustre_cfg_bufs_set_string(&bufs, 1, s1);
478 lustre_cfg_bufs_set_string(&bufs, 2, s2);
480 lustre_cfg_bufs_set_string(&bufs, 3, s3);
482 lustre_cfg_bufs_set_string(&bufs, 4, s4);
484 lcfg = lustre_cfg_new(cmd, &bufs);
485 lcfg->lcfg_nid = nid;
486 rc = class_process_config(lcfg);
487 lustre_cfg_free(lcfg);
491 /** Call class_attach and class_setup. These methods in turn call
492 * obd type-specific methods.
494 static int lustre_start_simple(char *obdname, char *type, char *uuid,
498 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
500 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
502 CERROR("%s attach error %d\n", obdname, rc);
505 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, 0, 0);
507 CERROR("%s setup error %d\n", obdname, rc);
508 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
513 /* Set up a MGS to serve startup logs */
514 static int server_start_mgs(struct super_block *sb)
516 struct lustre_sb_info *lsi = s2lsi(sb);
517 struct vfsmount *mnt = lsi->lsi_srv_mnt;
518 struct lustre_mount_info *lmi;
523 /* It is impossible to have more than 1 MGS per node, since
524 MGC wouldn't know which to connect to */
525 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
527 lsi = s2lsi(lmi->lmi_sb);
528 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
530 lsi->lsi_ldd->ldd_svname);
534 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
536 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
539 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
540 LUSTRE_MGS_OBDNAME, 0, 0);
541 /* Do NOT call server_deregister_mount() here. This leads to
542 * inability cleanup cleanly and free lsi and other stuff when
543 * mgs calls server_put_mount() in error handling case. -umka */
547 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
548 "Is the 'mgs' module loaded?\n",
549 LUSTRE_MGS_OBDNAME, rc);
553 static int server_stop_mgs(struct super_block *sb)
555 struct obd_device *obd;
559 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
561 /* There better be only one MGS */
562 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
564 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
568 /* The MGS should always stop when we say so */
570 rc = class_manual_cleanup(obd);
574 CFS_DECLARE_MUTEX(mgc_start_lock);
576 /** Set up a mgc obd to process startup logs
578 * \param sb [in] super block of the mgc obd
580 * \retval 0 success, otherwise error code
582 static int lustre_start_mgc(struct super_block *sb)
584 struct obd_connect_data *data = NULL;
585 struct lustre_sb_info *lsi = s2lsi(sb);
586 struct obd_device *obd;
587 struct obd_export *exp;
588 struct obd_uuid *uuid;
591 char *mgcname, *niduuid, *mgssec;
594 int rc = 0, i = 0, j, len;
597 LASSERT(lsi->lsi_lmd);
599 /* Find the first non-lo MGS nid for our MGC name */
600 if (lsi->lsi_flags & LSI_SERVER) {
601 ptr = lsi->lsi_ldd->ldd_params;
602 /* Use mgsnode= nids */
603 if ((class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0) &&
604 (class_parse_nid(ptr, &nid, &ptr) == 0)) {
606 } else if (IS_MGS(lsi->lsi_ldd)) {
607 lnet_process_id_t id;
608 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
609 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
616 } else { /* client */
617 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
618 ptr = lsi->lsi_lmd->lmd_dev;
619 if (class_parse_nid(ptr, &nid, &ptr) == 0)
623 CERROR("No valid MGS nids found.\n");
627 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
628 OBD_ALLOC(mgcname, len);
629 OBD_ALLOC(niduuid, len + 2);
630 if (!mgcname || !niduuid)
631 GOTO(out_free, rc = -ENOMEM);
632 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
634 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
636 cfs_mutex_down(&mgc_start_lock);
638 obd = class_name2obd(mgcname);
639 if (obd && !obd->obd_stopping) {
640 rc = obd_set_info_async(obd->obd_self_export,
641 strlen(KEY_MGSSEC), KEY_MGSSEC,
642 strlen(mgssec), mgssec, NULL);
646 /* Re-using an existing MGC */
647 cfs_atomic_inc(&obd->u.cli.cl_mgc_refcount);
650 /* If we are restarting the MGS, don't try to keep the MGC's
651 old connection, or registration will fail. */
652 if ((lsi->lsi_flags & LSI_SERVER) && IS_MGS(lsi->lsi_ldd)) {
653 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
657 /* Try all connections, but only once (again).
658 We don't want to block another target from starting
659 (using its local copy of the log), but we do want to connect
660 if at all possible. */
662 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
663 rc = obd_set_info_async(obd->obd_self_export,
664 sizeof(KEY_INIT_RECOV_BACKUP),
665 KEY_INIT_RECOV_BACKUP,
666 sizeof(recov_bk), &recov_bk, NULL);
670 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
672 /* Add the primary nids for the MGS */
674 sprintf(niduuid, "%s_%x", mgcname, i);
675 if (lsi->lsi_flags & LSI_SERVER) {
676 ptr = lsi->lsi_ldd->ldd_params;
677 if (IS_MGS(lsi->lsi_ldd)) {
678 /* Use local nids (including LO) */
679 lnet_process_id_t id;
680 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
681 rc = do_lcfg(mgcname, id.nid,
682 LCFG_ADD_UUID, niduuid, 0,0,0);
685 /* Use mgsnode= nids */
686 if (class_find_param(ptr, PARAM_MGSNODE, &ptr) != 0) {
687 CERROR("No MGS nids given.\n");
688 GOTO(out_free, rc = -EINVAL);
690 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
691 rc = do_lcfg(mgcname, nid,
692 LCFG_ADD_UUID, niduuid, 0,0,0);
696 } else { /* client */
697 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
698 ptr = lsi->lsi_lmd->lmd_dev;
699 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
700 rc = do_lcfg(mgcname, nid,
701 LCFG_ADD_UUID, niduuid, 0,0,0);
703 /* Stop at the first failover nid */
709 CERROR("No valid MGS nids found.\n");
710 GOTO(out_free, rc = -EINVAL);
712 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
714 /* Random uuid for MGC allows easier reconnects */
716 ll_generate_random_uuid(uuidc);
717 class_uuid_unparse(uuidc, uuid);
720 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
721 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
727 /* Add any failover MGS nids */
729 while ((*ptr == ':' ||
730 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0)) {
731 /* New failover node */
732 sprintf(niduuid, "%s_%x", mgcname, i);
734 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
736 rc = do_lcfg(mgcname, nid,
737 LCFG_ADD_UUID, niduuid, 0,0,0);
742 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
750 lsi->lsi_lmd->lmd_mgs_failnodes = i;
752 obd = class_name2obd(mgcname);
754 CERROR("Can't find mgcobd %s\n", mgcname);
755 GOTO(out_free, rc = -ENOTCONN);
758 rc = obd_set_info_async(obd->obd_self_export,
759 strlen(KEY_MGSSEC), KEY_MGSSEC,
760 strlen(mgssec), mgssec, NULL);
764 /* Keep a refcount of servers/clients who started with "mount",
765 so we know when we can get rid of the mgc. */
766 cfs_atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
768 /* Try all connections, but only once. */
770 rc = obd_set_info_async(obd->obd_self_export,
771 sizeof(KEY_INIT_RECOV_BACKUP),
772 KEY_INIT_RECOV_BACKUP,
773 sizeof(recov_bk), &recov_bk, NULL);
776 CWARN("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
777 /* We connect to the MGS at setup, and don't disconnect until cleanup */
780 GOTO(out, rc = -ENOMEM);
781 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_FID |
782 OBD_CONNECT_AT | OBD_CONNECT_FULL20;
783 data->ocd_version = LUSTRE_VERSION_CODE;
784 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
787 CERROR("connect failed %d\n", rc);
791 obd->u.cli.cl_mgc_mgsexp = exp;
794 /* Keep the mgc info in the sb. Note that many lsi's can point
798 cfs_mutex_up(&mgc_start_lock);
801 OBD_FREE(mgcname, len);
803 OBD_FREE(niduuid, len + 2);
807 static int lustre_stop_mgc(struct super_block *sb)
809 struct lustre_sb_info *lsi = s2lsi(sb);
810 struct obd_device *obd;
811 char *niduuid = 0, *ptr = 0;
812 int i, rc = 0, len = 0;
822 cfs_mutex_down(&mgc_start_lock);
823 LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
824 if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
825 /* This is not fatal, every client that stops
826 will call in here. */
827 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
828 cfs_atomic_read(&obd->u.cli.cl_mgc_refcount));
829 GOTO(out, rc = -EBUSY);
832 /* The MGC has no recoverable data in any case.
833 * force shotdown set in umount_begin */
834 obd->obd_no_recov = 1;
836 if (obd->u.cli.cl_mgc_mgsexp) {
837 /* An error is not fatal, if we are unable to send the
838 disconnect mgs ping evictor cleans up the export */
839 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
841 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
844 /* Save the obdname for cleaning the nid uuids, which are
846 len = strlen(obd->obd_name) + 6;
847 OBD_ALLOC(niduuid, len);
849 strcpy(niduuid, obd->obd_name);
850 ptr = niduuid + strlen(niduuid);
853 rc = class_manual_cleanup(obd);
857 /* Clean the nid uuids */
859 GOTO(out, rc = -ENOMEM);
861 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
862 sprintf(ptr, "_%x", i);
863 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
866 CERROR("del MDC UUID %s failed: rc = %d\n",
871 OBD_FREE(niduuid, len);
873 /* class_import_put will get rid of the additional connections */
874 cfs_mutex_up(&mgc_start_lock);
878 /* Since there's only one mgc per node, we have to change it's fs to get
879 access to the right disk. */
880 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
882 struct lustre_sb_info *lsi = s2lsi(sb);
886 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
888 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
889 rc = obd_set_info_async(mgc->obd_self_export,
890 sizeof(KEY_SET_FS), KEY_SET_FS,
891 sizeof(*sb), sb, NULL);
893 CERROR("can't set_fs %d\n", rc);
899 static int server_mgc_clear_fs(struct obd_device *mgc)
904 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
906 rc = obd_set_info_async(mgc->obd_self_export,
907 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
912 CFS_DECLARE_MUTEX(server_start_lock);
914 /* Stop MDS/OSS if nobody is using them */
915 static int server_stop_servers(int lddflags, int lsiflags)
917 struct obd_device *obd = NULL;
918 struct obd_type *type = NULL;
922 cfs_mutex_down(&server_start_lock);
924 /* Either an MDT or an OST or neither */
925 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
926 if ((lddflags & LDD_F_SV_TYPE_MDT) &&
927 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
928 /*FIXME pre-rename, should eventually be LUSTRE_MDT_NAME*/
929 type = class_search_type(LUSTRE_MDS_NAME);
931 /* if this was an OST, and there are no more OST's, clean up the OSS */
932 if ((lddflags & LDD_F_SV_TYPE_OST) &&
933 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
934 type = class_search_type(LUSTRE_OST_NAME);
937 if (obd && (!type || !type->typ_refcnt)) {
940 /* obd_fail doesn't mean much on a server obd */
941 err = class_manual_cleanup(obd);
946 cfs_mutex_up(&server_start_lock);
951 int server_mti_print(char *title, struct mgs_target_info *mti)
953 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
954 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
955 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
956 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
957 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
958 mti->mti_config_ver, mti->mti_flags);
962 static int server_sb2mti(struct super_block *sb, struct mgs_target_info *mti)
964 struct lustre_sb_info *lsi = s2lsi(sb);
965 struct lustre_disk_data *ldd = lsi->lsi_ldd;
966 lnet_process_id_t id;
970 if (!(lsi->lsi_flags & LSI_SERVER))
973 strncpy(mti->mti_fsname, ldd->ldd_fsname,
974 sizeof(mti->mti_fsname));
975 strncpy(mti->mti_svname, ldd->ldd_svname,
976 sizeof(mti->mti_svname));
978 mti->mti_nid_count = 0;
979 while (LNetGetId(i++, &id) != -ENOENT) {
980 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
982 mti->mti_nids[mti->mti_nid_count] = id.nid;
983 mti->mti_nid_count++;
984 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
985 CWARN("Only using first %d nids for %s\n",
986 mti->mti_nid_count, mti->mti_svname);
991 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
992 mti->mti_config_ver = 0;
993 mti->mti_flags = ldd->ldd_flags;
994 mti->mti_stripe_index = ldd->ldd_svindex;
995 memcpy(mti->mti_uuid, ldd->ldd_uuid, sizeof(mti->mti_uuid));
996 if (strlen(ldd->ldd_params) > sizeof(mti->mti_params)) {
997 CERROR("params too big for mti\n");
1000 memcpy(mti->mti_params, ldd->ldd_params, sizeof(mti->mti_params));
1004 /* Register an old or new target with the MGS. If needed MGS will construct
1005 startup logs and assign index */
1006 int server_register_target(struct super_block *sb)
1008 struct lustre_sb_info *lsi = s2lsi(sb);
1009 struct obd_device *mgc = lsi->lsi_mgc;
1010 struct lustre_disk_data *ldd = lsi->lsi_ldd;
1011 struct mgs_target_info *mti = NULL;
1017 if (!(lsi->lsi_flags & LSI_SERVER))
1023 rc = server_sb2mti(sb, mti);
1027 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1028 mti->mti_svname, mti->mti_fsname,
1029 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1032 /* Register the target */
1033 /* FIXME use mgc_process_config instead */
1034 rc = obd_set_info_async(mgc->u.cli.cl_mgc_mgsexp,
1035 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1036 sizeof(*mti), mti, NULL);
1040 /* Always update our flags */
1041 ldd->ldd_flags = mti->mti_flags & ~LDD_F_REWRITE_LDD;
1043 /* If this flag is set, it means the MGS wants us to change our
1044 on-disk data. (So far this means just the index.) */
1045 if (mti->mti_flags & LDD_F_REWRITE_LDD) {
1048 CDEBUG(D_MOUNT, "Changing on-disk index from %#x to %#x "
1049 "for %s\n", ldd->ldd_svindex, mti->mti_stripe_index,
1051 ldd->ldd_svindex = mti->mti_stripe_index;
1052 strncpy(ldd->ldd_svname, mti->mti_svname,
1053 sizeof(ldd->ldd_svname));
1054 /* or ldd_make_sv_name(ldd); */
1055 ldd_write(&mgc->obd_lvfs_ctxt, ldd);
1056 err = fsfilt_set_label(mgc, lsi->lsi_srv_mnt->mnt_sb,
1059 CERROR("Label set error %d\n", err);
1060 label = fsfilt_get_label(mgc, lsi->lsi_srv_mnt->mnt_sb);
1062 CDEBUG(D_MOUNT, "Disk label changed to %s\n", label);
1064 /* Flush the new ldd to disk */
1065 fsfilt_sync(mgc, lsi->lsi_srv_mnt->mnt_sb);
1074 /** Start server targets: MDTs and OSTs
1076 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1078 struct obd_device *obd;
1079 struct lustre_sb_info *lsi = s2lsi(sb);
1080 struct config_llog_instance cfg;
1084 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_ldd->ldd_svname);
1087 /* If we're an MDT, make sure the global MDS is running */
1088 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_MDT) {
1089 /* make sure the MDS is started */
1090 cfs_mutex_down(&server_start_lock);
1091 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1093 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1094 /* FIXME pre-rename, should eventually be LUSTRE_MDS_NAME */
1096 LUSTRE_MDS_OBDNAME"_uuid",
1099 cfs_mutex_up(&server_start_lock);
1100 CERROR("failed to start MDS: %d\n", rc);
1104 cfs_mutex_up(&server_start_lock);
1108 /* If we're an OST, make sure the global OSS is running */
1109 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_OST) {
1110 /* make sure OSS is started */
1111 cfs_mutex_down(&server_start_lock);
1112 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1114 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1116 LUSTRE_OSS_OBDNAME"_uuid",
1119 cfs_mutex_up(&server_start_lock);
1120 CERROR("failed to start OSS: %d\n", rc);
1124 cfs_mutex_up(&server_start_lock);
1127 /* Set the mgc fs to our server disk. This allows the MGC to
1128 * read and write configs locally, in case it can't talk to the MGS. */
1129 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1133 /* Register with MGS */
1134 rc = server_register_target(sb);
1135 if (rc && (lsi->lsi_ldd->ldd_flags &
1136 (LDD_F_NEED_INDEX | LDD_F_UPDATE | LDD_F_UPGRADE14))){
1137 CERROR("Required registration failed for %s: %d\n",
1138 lsi->lsi_ldd->ldd_svname, rc);
1140 LCONSOLE_ERROR_MSG(0x15f, "Communication error with "
1141 "the MGS. Is the MGS running?\n");
1145 if (rc == -EINVAL) {
1146 LCONSOLE_ERROR_MSG(0x160, "The MGS is refusing to allow this "
1147 "server (%s) to start. Please see messages"
1148 " on the MGS node.\n",
1149 lsi->lsi_ldd->ldd_svname);
1152 /* non-fatal error of registeration with MGS */
1154 CDEBUG(D_MOUNT, "Cannot register with MGS: %d\n", rc);
1156 /* Let the target look up the mount using the target's name
1157 (we can't pass the sb or mnt through class_process_config.) */
1158 rc = server_register_mount(lsi->lsi_ldd->ldd_svname, sb, mnt);
1162 /* Start targets using the llog named for the target */
1163 memset(&cfg, 0, sizeof(cfg));
1164 rc = lustre_process_log(sb, lsi->lsi_ldd->ldd_svname, &cfg);
1166 CERROR("failed to start server %s: %d\n",
1167 lsi->lsi_ldd->ldd_svname, rc);
1168 /* Do NOT call server_deregister_mount() here. This makes it
1169 * impossible to find mount later in cleanup time and leaves
1170 * @lsi and othder stuff leaked. -umka */
1175 /* Release the mgc fs for others to use */
1176 server_mgc_clear_fs(lsi->lsi_mgc);
1179 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1181 CERROR("no server named %s was started\n",
1182 lsi->lsi_ldd->ldd_svname);
1186 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1187 (OBP(obd, iocontrol))) {
1188 obd_iocontrol(OBD_IOC_ABORT_RECOVERY,
1189 obd->obd_self_export, 0, NULL, NULL);
1192 /* log has been fully processed */
1193 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1199 /***************** lustre superblock **************/
1201 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1203 struct lustre_sb_info *lsi;
1209 OBD_ALLOC_PTR(lsi->lsi_lmd);
1210 if (!lsi->lsi_lmd) {
1215 lsi->lsi_lmd->lmd_exclude_count = 0;
1216 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1217 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1218 s2lsi_nocast(sb) = lsi;
1219 /* we take 1 extra ref for our setup */
1220 cfs_atomic_set(&lsi->lsi_mounts, 1);
1222 /* Default umount style */
1223 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1228 static int lustre_free_lsi(struct super_block *sb)
1230 struct lustre_sb_info *lsi = s2lsi(sb);
1233 LASSERT(lsi != NULL);
1234 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1236 /* someone didn't call server_put_mount. */
1237 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1239 if (lsi->lsi_ldd != NULL)
1240 OBD_FREE(lsi->lsi_ldd, sizeof(*lsi->lsi_ldd));
1242 if (lsi->lsi_lmd != NULL) {
1243 if (lsi->lsi_lmd->lmd_dev != NULL)
1244 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1245 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1246 if (lsi->lsi_lmd->lmd_profile != NULL)
1247 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1248 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1249 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1250 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1251 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1252 if (lsi->lsi_lmd->lmd_opts != NULL)
1253 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1254 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1255 if (lsi->lsi_lmd->lmd_exclude_count)
1256 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1257 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1258 lsi->lsi_lmd->lmd_exclude_count);
1259 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1262 LASSERT(lsi->lsi_llsbi == NULL);
1263 OBD_FREE(lsi, sizeof(*lsi));
1264 s2lsi_nocast(sb) = NULL;
1269 /* The lsi has one reference for every server that is using the disk -
1270 e.g. MDT, MGS, and potentially MGC */
1271 static int lustre_put_lsi(struct super_block *sb)
1273 struct lustre_sb_info *lsi = s2lsi(sb);
1276 LASSERT(lsi != NULL);
1278 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
1279 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
1280 lustre_free_lsi(sb);
1286 /*************** server mount ******************/
1288 /** Kernel mount using mount options in MOUNT_DATA_FILE.
1289 * Since this file lives on the disk, we pre-mount using a common
1290 * type, read the file, then re-mount using the type specified in the
1293 static struct vfsmount *server_kernel_mount(struct super_block *sb)
1295 struct lvfs_run_ctxt mount_ctxt;
1296 struct lustre_sb_info *lsi = s2lsi(sb);
1297 struct lustre_disk_data *ldd;
1298 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1299 struct vfsmount *mnt;
1300 char *options = NULL;
1301 unsigned long page, s_flags;
1302 struct page *__page;
1306 OBD_ALLOC(ldd, sizeof(*ldd));
1308 RETURN(ERR_PTR(-ENOMEM));
1310 /* In the past, we have always used flags = 0.
1311 Note ext3/ldiskfs can't be mounted ro. */
1312 s_flags = sb->s_flags;
1314 /* allocate memory for options */
1315 OBD_PAGE_ALLOC(__page, CFS_ALLOC_STD);
1317 GOTO(out_free, rc = -ENOMEM);
1318 page = (unsigned long)cfs_page_address(__page);
1319 options = (char *)page;
1320 memset(options, 0, CFS_PAGE_SIZE);
1322 /* mount-line options must be added for pre-mount because it may
1323 * contain mount options such as journal_dev which are required
1324 * to mount successfuly the underlying filesystem */
1325 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0))
1326 strncat(options, lmd->lmd_opts, CFS_PAGE_SIZE - 1);
1328 /* Pre-mount ldiskfs to read the MOUNT_DATA_FILE */
1329 CDEBUG(D_MOUNT, "Pre-mount ldiskfs %s\n", lmd->lmd_dev);
1330 mnt = ll_kern_mount("ldiskfs", s_flags, lmd->lmd_dev, (void *)options);
1333 CERROR("premount %s:%#lx ldiskfs failed: %d "
1334 "Is the ldiskfs module available?\n",
1335 lmd->lmd_dev, s_flags, rc );
1339 OBD_SET_CTXT_MAGIC(&mount_ctxt);
1340 mount_ctxt.pwdmnt = mnt;
1341 mount_ctxt.pwd = mnt->mnt_root;
1342 mount_ctxt.fs = get_ds();
1344 rc = ldd_parse(&mount_ctxt, ldd);
1348 CERROR("premount parse options failed: rc = %d\n", rc);
1352 /* Done with our pre-mount, now do the real mount. */
1354 /* Glom up mount options */
1355 memset(options, 0, CFS_PAGE_SIZE);
1356 strncpy(options, ldd->ldd_mount_opts, CFS_PAGE_SIZE - 2);
1358 /* Add in any mount-line options */
1359 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0)) {
1360 int len = CFS_PAGE_SIZE - strlen(options) - 2;
1362 strcat(options, ",");
1363 strncat(options, lmd->lmd_opts, len);
1366 /* Special permanent mount flags */
1368 s_flags |= MS_NOATIME | MS_NODIRATIME;
1370 CDEBUG(D_MOUNT, "kern_mount: %s %s %s\n",
1371 MT_STR(ldd), lmd->lmd_dev, options);
1372 mnt = ll_kern_mount(MT_STR(ldd), s_flags, lmd->lmd_dev,
1376 CERROR("ll_kern_mount failed: rc = %d\n", rc);
1380 if (lmd->lmd_flags & LMD_FLG_ABORT_RECOV)
1381 simple_truncate(mnt->mnt_sb->s_root, mnt, LAST_RCVD,
1384 OBD_PAGE_FREE(__page);
1385 lsi->lsi_ldd = ldd; /* freed at lsi cleanup */
1386 CDEBUG(D_SUPER, "%s: mnt = %p\n", lmd->lmd_dev, mnt);
1391 OBD_PAGE_FREE(__page);
1392 OBD_FREE(ldd, sizeof(*ldd));
1393 lsi->lsi_ldd = NULL;
1394 RETURN(ERR_PTR(rc));
1397 /** Wait here forever until the mount refcount is 0 before completing umount,
1398 * else we risk dereferencing a null pointer.
1399 * LNET may take e.g. 165s before killing zombies.
1401 static void server_wait_finished(struct vfsmount *mnt)
1405 cfs_sigset_t blocked;
1407 cfs_waitq_init(&waitq);
1409 while (atomic_read(&mnt->mnt_count) > 1) {
1410 if (waited && (waited % 30 == 0))
1411 LCONSOLE_WARN("Mount still busy with %d refs after "
1413 atomic_read(&mnt->mnt_count),
1415 /* Cannot use l_event_wait() for an interruptible sleep. */
1417 blocked = l_w_e_set_sigs(sigmask(SIGKILL));
1418 cfs_waitq_wait_event_interruptible_timeout(
1420 (atomic_read(&mnt->mnt_count) == 1),
1421 cfs_time_seconds(3),
1423 cfs_block_sigs(blocked);
1425 LCONSOLE_EMERG("Danger: interrupted umount %s with "
1428 atomic_read(&mnt->mnt_count));
1435 /** Start the shutdown of servers at umount.
1437 static void server_put_super(struct super_block *sb)
1439 struct lustre_sb_info *lsi = s2lsi(sb);
1440 struct obd_device *obd;
1441 struct vfsmount *mnt = lsi->lsi_srv_mnt;
1442 char *tmpname, *extraname = NULL;
1444 int lddflags = lsi->lsi_ldd->ldd_flags;
1445 int lsiflags = lsi->lsi_flags;
1448 LASSERT(lsiflags & LSI_SERVER);
1450 tmpname_sz = strlen(lsi->lsi_ldd->ldd_svname) + 1;
1451 OBD_ALLOC(tmpname, tmpname_sz);
1452 memcpy(tmpname, lsi->lsi_ldd->ldd_svname, tmpname_sz);
1453 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1454 if (IS_MDT(lsi->lsi_ldd) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1455 snprintf(tmpname, tmpname_sz, "MGS");
1457 /* Stop the target */
1458 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1459 (IS_MDT(lsi->lsi_ldd) || IS_OST(lsi->lsi_ldd))) {
1460 struct lustre_profile *lprof = NULL;
1462 /* tell the mgc to drop the config log */
1463 lustre_end_log(sb, lsi->lsi_ldd->ldd_svname, NULL);
1465 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1466 If there are any setup/cleanup errors, save the lov
1467 name for safety cleanup later. */
1468 lprof = class_get_profile(lsi->lsi_ldd->ldd_svname);
1469 if (lprof && lprof->lp_dt) {
1470 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1471 strcpy(extraname, lprof->lp_dt);
1474 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1476 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1477 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
1479 /* We can't seem to give an error return code
1480 * to .put_super, so we better make sure we clean up! */
1482 class_manual_cleanup(obd);
1484 CERROR("no obd %s\n", lsi->lsi_ldd->ldd_svname);
1485 server_deregister_mount(lsi->lsi_ldd->ldd_svname);
1489 /* If they wanted the mgs to stop separately from the mdt, they
1490 should have put it on a different device. */
1491 if (IS_MGS(lsi->lsi_ldd)) {
1492 /* if MDS start with --nomgs, don't stop MGS then */
1493 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
1494 server_stop_mgs(sb);
1497 /* Clean the mgc and sb */
1498 lustre_common_put_super(sb);
1500 /* Wait for the targets to really clean up - can't exit (and let the
1501 sb get destroyed) while the mount is still in use */
1502 server_wait_finished(mnt);
1504 /* drop the One True Mount */
1507 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1508 until the target is really gone so that our type refcount check
1510 server_stop_servers(lddflags, lsiflags);
1512 /* In case of startup or cleanup err, stop related obds */
1514 obd = class_name2obd(extraname);
1516 CWARN("Cleaning orphaned obd %s\n", extraname);
1518 class_manual_cleanup(obd);
1520 OBD_FREE(extraname, strlen(extraname) + 1);
1523 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1524 OBD_FREE(tmpname, tmpname_sz);
1528 /** Called only for 'umount -f'
1530 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1531 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
1533 struct super_block *sb = vfsmnt->mnt_sb;
1535 static void server_umount_begin(struct super_block *sb)
1538 struct lustre_sb_info *lsi = s2lsi(sb);
1541 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1542 if (!(flags & MNT_FORCE)) {
1548 CDEBUG(D_MOUNT, "umount -f\n");
1549 /* umount = failover
1551 no third way to do non-force, non-failover */
1552 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1553 lsi->lsi_flags |= LSI_UMOUNT_FORCE;
1557 #ifndef HAVE_STATFS_DENTRY_PARAM
1558 static int server_statfs (struct super_block *sb, cfs_kstatfs_t *buf)
1561 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
1563 struct super_block *sb = dentry->d_sb;
1565 struct vfsmount *mnt = s2lsi(sb)->lsi_srv_mnt;
1568 if (mnt && mnt->mnt_sb && mnt->mnt_sb->s_op->statfs) {
1569 #ifdef HAVE_STATFS_DENTRY_PARAM
1570 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_root, buf);
1572 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_sb, buf);
1575 buf->f_type = sb->s_magic;
1581 buf->f_type = sb->s_magic;
1582 buf->f_bsize = sb->s_blocksize;
1588 buf->f_namelen = NAME_MAX;
1592 /** The operations we support directly on the superblock:
1593 * mount, umount, and df.
1595 static struct super_operations server_ops =
1597 .put_super = server_put_super,
1598 .umount_begin = server_umount_begin, /* umount -f */
1599 .statfs = server_statfs,
1602 #define log2(n) cfs_ffz(~(n))
1603 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1605 static int server_fill_super_common(struct super_block *sb)
1607 struct inode *root = 0;
1610 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1612 sb->s_blocksize = 4096;
1613 sb->s_blocksize_bits = log2(sb->s_blocksize);
1614 sb->s_magic = LUSTRE_SUPER_MAGIC;
1615 sb->s_maxbytes = 0; //PAGE_CACHE_MAXBYTES;
1616 sb->s_flags |= MS_RDONLY;
1617 sb->s_op = &server_ops;
1619 root = new_inode(sb);
1621 CERROR("Can't make root inode\n");
1625 /* returns -EIO for every operation */
1626 /* make_bad_inode(root); -- badness - can't umount */
1627 /* apparently we need to be a directory for the mount to finish */
1628 root->i_mode = S_IFDIR;
1630 sb->s_root = d_alloc_root(root);
1632 CERROR("Can't make root dentry\n");
1640 /** Fill in the superblock info for a Lustre server.
1641 * Mount the device with the correct options.
1642 * Read the on-disk config file.
1643 * Start the services.
1645 static int server_fill_super(struct super_block *sb)
1647 struct lustre_sb_info *lsi = s2lsi(sb);
1648 struct vfsmount *mnt;
1652 /* the One True Mount */
1653 mnt = server_kernel_mount(sb);
1656 CERROR("Unable to mount device %s: %d\n",
1657 lsi->lsi_lmd->lmd_dev, rc);
1661 lsi->lsi_srv_mnt = mnt;
1663 LASSERT(lsi->lsi_ldd);
1664 CDEBUG(D_MOUNT, "Found service %s for fs '%s' on device %s\n",
1665 lsi->lsi_ldd->ldd_svname, lsi->lsi_ldd->ldd_fsname,
1666 lsi->lsi_lmd->lmd_dev);
1668 if (class_name2obd(lsi->lsi_ldd->ldd_svname)) {
1669 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1670 "running. Double-mount may have compromised"
1671 " the disk journal.\n",
1672 lsi->lsi_ldd->ldd_svname);
1678 /* Start MGS before MGC */
1679 if (IS_MGS(lsi->lsi_ldd) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
1680 rc = server_start_mgs(sb);
1685 /* Start MGC before servers */
1686 rc = lustre_start_mgc(sb);
1690 /* Set up all obd devices for service */
1691 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1692 (IS_OST(lsi->lsi_ldd) || IS_MDT(lsi->lsi_ldd))) {
1693 rc = server_start_targets(sb, mnt);
1695 CERROR("Unable to start targets: %d\n", rc);
1698 /* FIXME overmount client here,
1699 or can we just start a client log and client_fill_super on this sb?
1700 We need to make sure server_put_super gets called too - ll_put_super
1701 calls lustre_common_put_super; check there for LSI_SERVER flag,
1703 Probably should start client from new thread so we can return.
1704 Client will not finish until all servers are connected.
1705 Note - MGS-only server does NOT get a client, since there is no
1706 lustre fs associated - the MGS is for all lustre fs's */
1709 rc = server_fill_super_common(sb);
1715 /* We jump here in case of failure while starting targets or MGS.
1716 * In this case we can't just put @mnt and have to do real cleanup
1717 * with stoping targets, etc. */
1718 server_put_super(sb);
1722 /* Get the index from the obd name.
1723 rc = server type, or
1725 if endptr isn't NULL it is set to end of name */
1726 int server_name2index(char *svname, __u32 *idx, char **endptr)
1728 unsigned long index;
1730 char *dash = strrchr(svname, '-');
1734 /* intepret <fsname>-MDTXXXXX-mdc as mdt, the better way is to pass
1735 * in the fsname, then determine the server index */
1736 if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) {
1738 for (; dash > svname && *dash != '-'; dash--);
1743 if (strncmp(dash + 1, "MDT", 3) == 0)
1744 rc = LDD_F_SV_TYPE_MDT;
1745 else if (strncmp(dash + 1, "OST", 3) == 0)
1746 rc = LDD_F_SV_TYPE_OST;
1749 if (strcmp(dash + 4, "all") == 0)
1750 return rc | LDD_F_SV_ALL;
1752 index = simple_strtoul(dash + 4, endptr, 16);
1757 /*************** mount common betweeen server and client ***************/
1760 int lustre_common_put_super(struct super_block *sb)
1765 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
1767 /* Drop a ref to the MGC */
1768 rc = lustre_stop_mgc(sb);
1769 if (rc && (rc != -ENOENT)) {
1771 CERROR("Can't stop MGC: %d\n", rc);
1774 /* BUSY just means that there's some other obd that
1775 needs the mgc. Let him clean it up. */
1776 CDEBUG(D_MOUNT, "MGC still in use\n");
1778 /* Drop a ref to the mounted disk */
1784 static void lmd_print(struct lustre_mount_data *lmd)
1788 PRINT_CMD(PRINT_MASK, " mount data:\n");
1789 if (lmd_is_client(lmd))
1790 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
1791 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
1792 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
1795 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
1797 if (lmd->lmd_recovery_time_soft)
1798 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
1799 lmd->lmd_recovery_time_soft);
1801 if (lmd->lmd_recovery_time_hard)
1802 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
1803 lmd->lmd_recovery_time_hard);
1805 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1806 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
1807 lmd->lmd_exclude[i]);
1811 /* Is this server on the exclusion list */
1812 int lustre_check_exclusion(struct super_block *sb, char *svname)
1814 struct lustre_sb_info *lsi = s2lsi(sb);
1815 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1820 rc = server_name2index(svname, &index, NULL);
1821 if (rc != LDD_F_SV_TYPE_OST)
1822 /* Only exclude OSTs */
1825 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1826 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1828 for(i = 0; i < lmd->lmd_exclude_count; i++) {
1829 if (index == lmd->lmd_exclude[i]) {
1830 CWARN("Excluding %s (on exclusion list)\n", svname);
1837 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1838 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
1840 char *s1 = ptr, *s2;
1841 __u32 index, *exclude_list;
1845 /* The shortest an ost name can be is 8 chars: -OST0000.
1846 We don't actually know the fsname at this time, so in fact
1847 a user could specify any fsname. */
1848 devmax = strlen(ptr) / 8 + 1;
1850 /* temp storage until we figure out how many we have */
1851 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
1855 /* we enter this fn pointing at the '=' */
1856 while (*s1 && *s1 != ' ' && *s1 != ',') {
1858 rc = server_name2index(s1, &index, &s2);
1860 CERROR("Can't parse server name '%s'\n", s1);
1863 if (rc == LDD_F_SV_TYPE_OST)
1864 exclude_list[lmd->lmd_exclude_count++] = index;
1866 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
1868 /* now we are pointing at ':' (next exclude)
1869 or ',' (end of excludes) */
1870 if (lmd->lmd_exclude_count >= devmax)
1873 if (rc >= 0) /* non-err */
1876 if (lmd->lmd_exclude_count) {
1877 /* permanent, freed in lustre_free_lsi */
1878 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1879 lmd->lmd_exclude_count);
1880 if (lmd->lmd_exclude) {
1881 memcpy(lmd->lmd_exclude, exclude_list,
1882 sizeof(index) * lmd->lmd_exclude_count);
1885 lmd->lmd_exclude_count = 0;
1888 OBD_FREE(exclude_list, sizeof(index) * devmax);
1892 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1897 if (lmd->lmd_mgssec != NULL) {
1898 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1899 lmd->lmd_mgssec = NULL;
1902 tail = strchr(ptr, ',');
1904 length = strlen(ptr);
1906 length = tail - ptr;
1908 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1909 if (lmd->lmd_mgssec == NULL)
1912 memcpy(lmd->lmd_mgssec, ptr, length);
1913 lmd->lmd_mgssec[length] = '\0';
1917 /** Parse mount line options
1918 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
1919 * dev is passed as device=uml1:/lustre by mount.lustre
1921 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1923 char *s1, *s2, *devname = NULL;
1924 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1930 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1931 "/sbin/mount.lustre is installed.\n");
1935 /* Options should be a string - try to detect old lmd data */
1936 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1937 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1938 "/sbin/mount.lustre. Please install "
1939 "version %s\n", LUSTRE_VERSION_STRING);
1942 lmd->lmd_magic = LMD_MAGIC;
1944 /* Set default flags here */
1949 int time_min = 2 * (CONNECTION_SWITCH_MAX +
1950 2 * INITIAL_CONNECT_TIMEOUT);
1952 /* Skip whitespace and extra commas */
1953 while (*s1 == ' ' || *s1 == ',')
1956 /* Client options are parsed in ll_options: eg. flock,
1959 /* Parse non-ldiskfs options here. Rather than modifying
1960 ldiskfs, we just zero these out here */
1961 if (strncmp(s1, "abort_recov", 11) == 0) {
1962 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1964 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1965 lmd->lmd_recovery_time_soft = max_t(int,
1966 simple_strtoul(s1 + 19, NULL, 10), time_min);
1968 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1969 lmd->lmd_recovery_time_hard = max_t(int,
1970 simple_strtoul(s1 + 19, NULL, 10), time_min);
1972 } else if (strncmp(s1, "nosvc", 5) == 0) {
1973 lmd->lmd_flags |= LMD_FLG_NOSVC;
1975 } else if (strncmp(s1, "nomgs", 5) == 0) {
1976 lmd->lmd_flags |= LMD_FLG_NOMGS;
1978 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1979 rc = lmd_parse_mgssec(lmd, s1 + 7);
1983 /* ost exclusion list */
1984 } else if (strncmp(s1, "exclude=", 8) == 0) {
1985 rc = lmd_make_exclusion(lmd, s1 + 7);
1990 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1991 end of the options. */
1992 else if (strncmp(s1, "device=", 7) == 0) {
1994 /* terminate options right before device. device
1995 must be the last one. */
2001 s2 = strchr(s1, ',');
2009 memmove(s1, s2, strlen(s2) + 1);
2015 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2016 "(need mount option 'device=...')\n");
2020 s1 = strstr(devname, ":/");
2023 lmd->lmd_flags = LMD_FLG_CLIENT;
2024 /* Remove leading /s from fsname */
2025 while (*++s1 == '/') ;
2026 /* Freed in lustre_free_lsi */
2027 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2028 if (!lmd->lmd_profile)
2030 sprintf(lmd->lmd_profile, "%s-client", s1);
2033 /* Freed in lustre_free_lsi */
2034 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2037 strcpy(lmd->lmd_dev, devname);
2039 /* Save mount options */
2040 s1 = options + strlen(options) - 1;
2041 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2043 if (*options != 0) {
2044 /* Freed in lustre_free_lsi */
2045 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2048 strcpy(lmd->lmd_opts, options);
2052 lmd->lmd_magic = LMD_MAGIC;
2057 CERROR("Bad mount options %s\n", options);
2062 /** This is the entry point for the mount call into Lustre.
2063 * This is called when a server or client is mounted,
2064 * and this is where we start setting things up.
2065 * @param data Mount options (e.g. -o flock,abort_recov)
2067 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2069 struct lustre_mount_data *lmd;
2070 struct lustre_sb_info *lsi;
2074 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2076 lsi = lustre_init_lsi(sb);
2082 * Disable lockdep during mount, because mount locking patterns are
2087 /* Figure out the lmd from the mount options */
2088 if (lmd_parse((char *)data, lmd)) {
2090 GOTO(out, rc = -EINVAL);
2093 if (lmd_is_client(lmd)) {
2094 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2095 if (!client_fill_super) {
2096 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2097 "client mount! Is the 'lustre' "
2098 "module loaded?\n");
2102 rc = lustre_start_mgc(sb);
2107 /* Connect and start */
2108 /* (should always be ll_fill_super) */
2109 rc = (*client_fill_super)(sb);
2110 /* c_f_s will call lustre_common_put_super on failure */
2113 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2114 lsi->lsi_flags |= LSI_SERVER;
2115 rc = server_fill_super(sb);
2116 /* s_f_s calls lustre_start_mgc after the mount because we need
2117 the MGS nids which are stored on disk. Plus, we may
2118 need to start the MGS first. */
2119 /* s_f_s will call server_put_super on failure */
2122 /* If error happens in fill_super() call, @lsi will be killed there.
2123 * This is why we do not put it here. */
2127 CERROR("Unable to mount %s (%d)\n",
2128 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2130 CDEBUG(D_SUPER, "Mount %s complete\n",
2138 /* We can't call ll_fill_super by name because it lives in a module that
2139 must be loaded after this one. */
2140 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb))
2142 client_fill_super = cfs;
2145 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
2147 kill_super_cb = cfs;
2150 /***************** FS registration ******************/
2152 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
2153 struct super_block * lustre_get_sb(struct file_system_type *fs_type,
2154 int flags, const char *devname, void * data)
2156 return get_sb_nodev(fs_type, flags, data, lustre_fill_super);
2159 int lustre_get_sb(struct file_system_type *fs_type,
2160 int flags, const char *devname, void * data,
2161 struct vfsmount *mnt)
2163 return get_sb_nodev(fs_type, flags, data, lustre_fill_super, mnt);
2167 void lustre_kill_super(struct super_block *sb)
2169 struct lustre_sb_info *lsi = s2lsi(sb);
2171 if (kill_super_cb && lsi && !(lsi->lsi_flags & LSI_SERVER))
2172 (*kill_super_cb)(sb);
2174 kill_anon_super(sb);
2177 /** Register the "lustre" fs type
2179 struct file_system_type lustre_fs_type = {
2180 .owner = THIS_MODULE,
2182 .get_sb = lustre_get_sb,
2183 .kill_sb = lustre_kill_super,
2184 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
2185 #ifdef FS_HAS_FIEMAP
2188 LL_RENAME_DOES_D_MOVE,
2191 int lustre_register_fs(void)
2193 return register_filesystem(&lustre_fs_type);
2196 int lustre_unregister_fs(void)
2198 return unregister_filesystem(&lustre_fs_type);
2201 EXPORT_SYMBOL(lustre_register_client_fill_super);
2202 EXPORT_SYMBOL(lustre_register_kill_super_cb);
2203 EXPORT_SYMBOL(lustre_common_put_super);
2204 EXPORT_SYMBOL(lustre_process_log);
2205 EXPORT_SYMBOL(lustre_end_log);
2206 EXPORT_SYMBOL(server_get_mount);
2207 EXPORT_SYMBOL(server_get_mount_2);
2208 EXPORT_SYMBOL(server_put_mount);
2209 EXPORT_SYMBOL(server_put_mount_2);
2210 EXPORT_SYMBOL(server_register_target);
2211 EXPORT_SYMBOL(server_name2index);
2212 EXPORT_SYMBOL(server_mti_print);
2213 EXPORT_SYMBOL(do_lcfg);