1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/obdclass/obd_mount.c
5 * Client/server mount routines
7 * Copyright (c) 2006 Cluster File Systems, Inc.
8 * Author: Nathan Rutman <nathan@clusterfs.com>
10 * This file is part of Lustre, http://www.lustre.org/
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #define DEBUG_SUBSYSTEM S_CLASS
28 #define D_MOUNT D_SUPER|D_CONFIG /*|D_WARNING */
29 #define PRINT_CMD CDEBUG
30 #define PRINT_MASK D_SUPER|D_CONFIG
34 #include <lustre_fsfilt.h>
35 #include <obd_class.h>
36 #include <lustre/lustre_user.h>
37 #include <linux/version.h>
38 #include <lustre_log.h>
39 #include <lustre_disk.h>
40 #include <lustre_param.h>
42 static int (*client_fill_super)(struct super_block *sb) = NULL;
43 static void (*kill_super_cb)(struct super_block *sb) = NULL;
45 /*********** mount lookup *********/
47 DECLARE_MUTEX(lustre_mount_info_lock);
48 struct list_head server_mount_info_list = LIST_HEAD_INIT(server_mount_info_list);
50 static struct lustre_mount_info *server_find_mount(const char *name)
52 struct list_head *tmp;
53 struct lustre_mount_info *lmi;
56 list_for_each(tmp, &server_mount_info_list) {
57 lmi = list_entry(tmp, struct lustre_mount_info, lmi_list_chain);
58 if (strcmp(name, lmi->lmi_name) == 0)
64 /* we must register an obd for a mount before we call the setup routine.
65 *_setup will call lustre_get_mount to get the mnt struct
66 by obd_name, since we can't pass the pointer to setup. */
67 static int server_register_mount(const char *name, struct super_block *sb,
70 struct lustre_mount_info *lmi;
77 OBD_ALLOC(lmi, sizeof(*lmi));
80 OBD_ALLOC(name_cp, strlen(name) + 1);
82 OBD_FREE(lmi, sizeof(*lmi));
85 strcpy(name_cp, name);
87 down(&lustre_mount_info_lock);
89 if (server_find_mount(name)) {
90 up(&lustre_mount_info_lock);
91 OBD_FREE(lmi, sizeof(*lmi));
92 OBD_FREE(name_cp, strlen(name) + 1);
93 CERROR("Already registered %s\n", name);
96 lmi->lmi_name = name_cp;
99 list_add(&lmi->lmi_list_chain, &server_mount_info_list);
101 up(&lustre_mount_info_lock);
103 CDEBUG(D_MOUNT, "reg_mnt %p from %s, vfscount=%d\n",
104 lmi->lmi_mnt, name, atomic_read(&lmi->lmi_mnt->mnt_count));
109 /* when an obd no longer needs a mount */
110 static int server_deregister_mount(const char *name)
112 struct lustre_mount_info *lmi;
115 down(&lustre_mount_info_lock);
116 lmi = server_find_mount(name);
118 up(&lustre_mount_info_lock);
119 CERROR("%s not registered\n", name);
123 CDEBUG(D_MOUNT, "dereg_mnt %p from %s, vfscount=%d\n",
124 lmi->lmi_mnt, name, atomic_read(&lmi->lmi_mnt->mnt_count));
126 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
127 list_del(&lmi->lmi_list_chain);
128 OBD_FREE(lmi, sizeof(*lmi));
129 up(&lustre_mount_info_lock);
134 /* obd's look up a registered mount using their obdname. This is just
135 for initial obd setup to find the mount struct. It should not be
136 called every time you want to mntget. */
137 struct lustre_mount_info *server_get_mount(const char *name)
139 struct lustre_mount_info *lmi;
140 struct lustre_sb_info *lsi;
143 down(&lustre_mount_info_lock);
144 lmi = server_find_mount(name);
145 up(&lustre_mount_info_lock);
147 CERROR("Can't find mount for %s\n", name);
150 lsi = s2lsi(lmi->lmi_sb);
151 mntget(lmi->lmi_mnt);
152 atomic_inc(&lsi->lsi_mounts);
154 CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d, vfscount=%d\n",
155 lmi->lmi_mnt, name, atomic_read(&lsi->lsi_mounts),
156 atomic_read(&lmi->lmi_mnt->mnt_count));
162 * Used by mdt to get mount_info from obdname.
163 * There are no blocking when using the mount_info.
164 * Do not use server_get_mount for this purpose.
166 struct lustre_mount_info *server_get_mount_2(const char *name)
168 struct lustre_mount_info *lmi;
171 down(&lustre_mount_info_lock);
172 lmi = server_find_mount(name);
173 up(&lustre_mount_info_lock);
175 CERROR("Can't find mount for %s\n", name);
180 static void unlock_mntput(struct vfsmount *mnt)
182 if (kernel_locked()) {
191 static int lustre_put_lsi(struct super_block *sb);
193 /* to be called from obd_cleanup methods */
194 int server_put_mount(const char *name, struct vfsmount *mnt)
196 struct lustre_mount_info *lmi;
197 struct lustre_sb_info *lsi;
198 int count = atomic_read(&mnt->mnt_count) - 1;
201 /* This might be the last one, can't deref after this */
204 down(&lustre_mount_info_lock);
205 lmi = server_find_mount(name);
206 up(&lustre_mount_info_lock);
208 CERROR("Can't find mount for %s\n", name);
211 lsi = s2lsi(lmi->lmi_sb);
212 LASSERT(lmi->lmi_mnt == mnt);
214 CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d, vfscount=%d\n",
215 lmi->lmi_mnt, name, atomic_read(&lsi->lsi_mounts), count);
217 if (lustre_put_lsi(lmi->lmi_sb)) {
218 CDEBUG(D_MOUNT, "Last put of mnt %p from %s, vfscount=%d\n",
219 lmi->lmi_mnt, name, count);
220 /* last mount is the One True Mount */
222 CERROR("%s: mount busy, vfscount=%d!\n", name, count);
225 /* this obd should never need the mount again */
226 server_deregister_mount(name);
231 /* Corresponding to server_get_mount_2 */
232 int server_put_mount_2(const char *name, struct vfsmount *mnt)
238 /******* mount helper utilities *********/
241 static void ldd_print(struct lustre_disk_data *ldd)
243 PRINT_CMD(PRINT_MASK, " disk data:\n");
244 PRINT_CMD(PRINT_MASK, "server: %s\n", ldd->ldd_svname);
245 PRINT_CMD(PRINT_MASK, "uuid: %s\n", (char *)ldd->ldd_uuid);
246 PRINT_CMD(PRINT_MASK, "fs: %s\n", ldd->ldd_fsname);
247 PRINT_CMD(PRINT_MASK, "index: %04x\n", ldd->ldd_svindex);
248 PRINT_CMD(PRINT_MASK, "config: %d\n", ldd->ldd_config_ver);
249 PRINT_CMD(PRINT_MASK, "flags: %#x\n", ldd->ldd_flags);
250 PRINT_CMD(PRINT_MASK, "diskfs: %s\n", MT_STR(ldd));
251 PRINT_CMD(PRINT_MASK, "options: %s\n", ldd->ldd_mount_opts);
252 PRINT_CMD(PRINT_MASK, "params: %s\n", ldd->ldd_params);
253 PRINT_CMD(PRINT_MASK, "comment: %s\n", ldd->ldd_userdata);
257 static int ldd_parse(struct lvfs_run_ctxt *mount_ctxt,
258 struct lustre_disk_data *ldd)
260 struct lvfs_run_ctxt saved;
267 push_ctxt(&saved, mount_ctxt, NULL);
269 file = filp_open(MOUNT_DATA_FILE, O_RDONLY, 0644);
272 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
276 len = i_size_read(file->f_dentry->d_inode);
277 CDEBUG(D_MOUNT, "Have %s, size %lu\n", MOUNT_DATA_FILE, len);
278 if (len != sizeof(*ldd)) {
279 CERROR("disk data size does not match: see %lu expect "LPSZ"\n",
281 GOTO(out_close, rc = -EINVAL);
284 rc = lustre_fread(file, ldd, len, &off);
286 CERROR("error reading %s: read %d of %lu\n",
287 MOUNT_DATA_FILE, rc, len);
288 GOTO(out_close, rc = -EINVAL);
292 if (ldd->ldd_magic != LDD_MAGIC) {
293 /* FIXME add swabbing support */
294 CERROR("Bad magic in %s: %x!=%x\n", MOUNT_DATA_FILE,
295 ldd->ldd_magic, LDD_MAGIC);
296 GOTO(out_close, rc = -EINVAL);
299 if (ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP) {
300 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
302 ldd->ldd_feature_incompat & ~LDD_INCOMPAT_SUPP);
303 GOTO(out_close, rc = -EINVAL);
305 if (ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP) {
306 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
308 ldd->ldd_feature_rocompat & ~LDD_ROCOMPAT_SUPP);
309 /* Do something like remount filesystem read-only */
310 GOTO(out_close, rc = -EINVAL);
316 pop_ctxt(&saved, mount_ctxt, NULL);
320 static int ldd_write(struct lvfs_run_ctxt *mount_ctxt,
321 struct lustre_disk_data *ldd)
323 struct lvfs_run_ctxt saved;
326 unsigned long len = sizeof(struct lustre_disk_data);
330 LASSERT(ldd->ldd_magic == LDD_MAGIC);
332 ldd->ldd_config_ver++;
334 push_ctxt(&saved, mount_ctxt, NULL);
336 file = filp_open(MOUNT_DATA_FILE, O_RDWR, 0644);
339 CERROR("cannot open %s: rc = %d\n", MOUNT_DATA_FILE, rc);
343 rc = lustre_fwrite(file, ldd, len, &off);
345 CERROR("error writing %s: read %d of %lu\n",
346 MOUNT_DATA_FILE, rc, len);
347 GOTO(out_close, rc = -EINVAL);
355 pop_ctxt(&saved, mount_ctxt, NULL);
360 /**************** config llog ********************/
362 /* Get a config log from the MGS and process it.
363 This func is called for both clients and servers.
364 Continue to process new statements appended to the logs
365 (whenever the config lock is revoked) until lustre_end_log
367 int lustre_process_log(struct super_block *sb, char *logname,
368 struct config_llog_instance *cfg)
370 struct lustre_cfg *lcfg;
371 struct lustre_cfg_bufs bufs;
372 struct lustre_sb_info *lsi = s2lsi(sb);
373 struct obd_device *mgc = lsi->lsi_mgc;
380 /* mgc_process_config */
381 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
382 lustre_cfg_bufs_set_string(&bufs, 1, logname);
383 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
384 lustre_cfg_bufs_set(&bufs, 3, &sb, sizeof(sb));
385 lcfg = lustre_cfg_new(LCFG_LOG_START, &bufs);
386 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
387 lustre_cfg_free(lcfg);
390 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
391 "failed from the MGS (%d). Make sure this "
392 "client and the MGS are running compatible "
393 "versions of Lustre.\n",
394 mgc->obd_name, logname, rc);
397 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
398 "failed (%d). This may be the result of "
399 "communication errors between this node and "
400 "the MGS, a bad configuration, or other "
401 "errors. See the syslog for more "
402 "information.\n", mgc->obd_name, logname,
405 /* class_obd_list(); */
409 /* Stop watching this config log for updates */
410 int lustre_end_log(struct super_block *sb, char *logname,
411 struct config_llog_instance *cfg)
413 struct lustre_cfg *lcfg;
414 struct lustre_cfg_bufs bufs;
415 struct lustre_sb_info *lsi = s2lsi(sb);
416 struct obd_device *mgc = lsi->lsi_mgc;
423 /* mgc_process_config */
424 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
425 lustre_cfg_bufs_set_string(&bufs, 1, logname);
427 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
428 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
429 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
430 lustre_cfg_free(lcfg);
434 /**************** obd start *******************/
436 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
437 char *s1, char *s2, char *s3, char *s4)
439 struct lustre_cfg_bufs bufs;
440 struct lustre_cfg * lcfg = NULL;
443 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
444 cmd, s1, s2, s3, s4);
446 lustre_cfg_bufs_reset(&bufs, cfgname);
448 lustre_cfg_bufs_set_string(&bufs, 1, s1);
450 lustre_cfg_bufs_set_string(&bufs, 2, s2);
452 lustre_cfg_bufs_set_string(&bufs, 3, s3);
454 lustre_cfg_bufs_set_string(&bufs, 4, s4);
456 lcfg = lustre_cfg_new(cmd, &bufs);
457 lcfg->lcfg_nid = nid;
458 rc = class_process_config(lcfg);
459 lustre_cfg_free(lcfg);
463 static int lustre_start_simple(char *obdname, char *type, char *uuid,
467 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
469 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
471 CERROR("%s attach error %d\n", obdname, rc);
474 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, 0, 0);
476 CERROR("%s setup error %d\n", obdname, rc);
477 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
482 /* Set up a MGS to serve startup logs */
483 static int server_start_mgs(struct super_block *sb)
485 struct lustre_sb_info *lsi = s2lsi(sb);
486 struct vfsmount *mnt = lsi->lsi_srv_mnt;
487 struct lustre_mount_info *lmi;
492 /* It is impossible to have more than 1 MGS per node, since
493 MGC wouldn't know which to connect to */
494 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
496 lsi = s2lsi(lmi->lmi_sb);
497 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
499 lsi->lsi_ldd->ldd_svname);
503 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
505 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
508 ((rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
509 LUSTRE_MGS_OBDNAME, 0, 0))))
510 server_deregister_mount(LUSTRE_MGS_OBDNAME);
513 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
514 "Is the 'mgs' module loaded?\n",
515 LUSTRE_MGS_OBDNAME, rc);
519 static int server_stop_mgs(struct super_block *sb)
521 struct obd_device *obd;
525 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
527 /* There better be only one MGS */
528 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
530 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
534 /* The MGS should always stop when we say so */
536 rc = class_manual_cleanup(obd);
540 DECLARE_MUTEX(mgc_start_lock);
542 /* Set up a mgcobd to process startup logs */
543 static int lustre_start_mgc(struct super_block *sb)
545 struct lustre_handle mgc_conn = {0, };
546 struct obd_connect_data ocd = { 0 };
547 struct lustre_sb_info *lsi = s2lsi(sb);
548 struct obd_device *obd;
549 struct obd_export *exp;
550 struct obd_uuid *uuid;
553 char *mgcname, *niduuid;
556 int rc = 0, i = 0, j, len;
559 LASSERT(lsi->lsi_lmd);
561 /* Find the first non-lo MGS nid for our MGC name */
562 if (lsi->lsi_flags & LSI_SERVER) {
563 ptr = lsi->lsi_ldd->ldd_params;
564 /* Use mgsnode= nids */
565 if ((class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0) &&
566 (class_parse_nid(ptr, &nid, &ptr) == 0)) {
568 } else if (IS_MGS(lsi->lsi_ldd)) {
569 lnet_process_id_t id;
570 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
571 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
578 } else { /* client */
579 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
580 ptr = lsi->lsi_lmd->lmd_dev;
581 if (class_parse_nid(ptr, &nid, &ptr) == 0)
585 CERROR("No valid MGS nids found.\n");
589 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
590 OBD_ALLOC(mgcname, len);
591 OBD_ALLOC(niduuid, len + 2);
592 if (!mgcname || !niduuid)
593 GOTO(out_free, rc = -ENOMEM);
594 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
596 mutex_down(&mgc_start_lock);
598 obd = class_name2obd(mgcname);
600 /* Re-using an existing MGC */
601 atomic_inc(&obd->u.cli.cl_mgc_refcount);
604 /* If we are restarting the MGS, don't try to keep the MGC's
605 old connection, or registration will fail. */
606 if ((lsi->lsi_flags & LSI_SERVER) && IS_MGS(lsi->lsi_ldd)) {
607 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
611 /* Try all connections, but only once (again).
612 We don't want to block another target from starting
613 (using its local copy of the log), but we do want to connect
614 if at all possible. */
616 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
617 rc = obd_set_info_async(obd->obd_self_export,
618 strlen(KEY_INIT_RECOV_BACKUP),
619 KEY_INIT_RECOV_BACKUP,
620 sizeof(recov_bk), &recov_bk, NULL);
624 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
626 /* Add the primary nids for the MGS */
628 sprintf(niduuid, "%s_%x", mgcname, i);
629 if (lsi->lsi_flags & LSI_SERVER) {
630 ptr = lsi->lsi_ldd->ldd_params;
631 if (IS_MGS(lsi->lsi_ldd)) {
632 /* Use local nids (including LO) */
633 lnet_process_id_t id;
634 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
635 rc = do_lcfg(mgcname, id.nid,
636 LCFG_ADD_UUID, niduuid, 0,0,0);
639 /* Use mgsnode= nids */
640 if (class_find_param(ptr, PARAM_MGSNODE, &ptr) != 0) {
641 CERROR("No MGS nids given.\n");
642 GOTO(out_free, rc = -EINVAL);
644 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
645 rc = do_lcfg(mgcname, nid,
646 LCFG_ADD_UUID, niduuid, 0,0,0);
650 } else { /* client */
651 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
652 ptr = lsi->lsi_lmd->lmd_dev;
653 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
654 rc = do_lcfg(mgcname, nid,
655 LCFG_ADD_UUID, niduuid, 0,0,0);
657 /* Stop at the first failover nid */
663 CERROR("No valid MGS nids found.\n");
664 GOTO(out_free, rc = -EINVAL);
666 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
668 /* Random uuid for MGC allows easier reconnects */
670 ll_generate_random_uuid(uuidc);
671 class_uuid_unparse(uuidc, uuid);
674 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
675 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
681 /* Add any failover MGS nids */
683 while ((*ptr == ':' ||
684 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0)) {
685 /* New failover node */
686 sprintf(niduuid, "%s_%x", mgcname, i);
688 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
690 rc = do_lcfg(mgcname, nid,
691 LCFG_ADD_UUID, niduuid, 0,0,0);
696 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
704 lsi->lsi_lmd->lmd_mgs_failnodes = i;
706 obd = class_name2obd(mgcname);
708 CERROR("Can't find mgcobd %s\n", mgcname);
709 GOTO(out_free, rc = -ENOTCONN);
712 /* Keep a refcount of servers/clients who started with "mount",
713 so we know when we can get rid of the mgc. */
714 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
716 /* Try all connections, but only once. */
718 rc = obd_set_info_async(obd->obd_self_export,
719 strlen(KEY_INIT_RECOV_BACKUP),
720 KEY_INIT_RECOV_BACKUP,
721 sizeof(recov_bk), &recov_bk, NULL);
724 CERROR("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
725 /* We connect to the MGS at setup, and don't disconnect until cleanup */
726 rc = obd_connect(NULL, &mgc_conn, obd, &(obd->obd_uuid), &ocd);
728 CERROR("connect failed %d\n", rc);
732 exp = class_conn2export(&mgc_conn);
733 obd->u.cli.cl_mgc_mgsexp = exp;
736 /* Keep the mgc info in the sb. Note that many lsi's can point
740 mutex_up(&mgc_start_lock);
743 OBD_FREE(mgcname, len);
745 OBD_FREE(niduuid, len + 2);
749 static int lustre_stop_mgc(struct super_block *sb)
751 struct lustre_sb_info *lsi = s2lsi(sb);
752 struct obd_device *obd;
753 char *niduuid = 0, *ptr = 0;
754 int i, rc = 0, len = 0;
764 mutex_down(&mgc_start_lock);
765 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
766 /* This is not fatal, every client that stops
767 will call in here. */
768 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
769 atomic_read(&obd->u.cli.cl_mgc_refcount));
770 GOTO(out, rc = -EBUSY);
773 /* MGC must always stop */
775 /* client_disconnect_export uses the no_recov flag to decide whether it
776 should disconnect or just invalidate. (The MGC has no
777 recoverable data in any case.) */
778 obd->obd_no_recov = 1;
780 if (obd->u.cli.cl_mgc_mgsexp)
781 obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
783 /* Save the obdname for cleaning the nid uuids, which are
785 len = strlen(obd->obd_name) + 6;
786 OBD_ALLOC(niduuid, len);
788 strcpy(niduuid, obd->obd_name);
789 ptr = niduuid + strlen(niduuid);
792 rc = class_manual_cleanup(obd);
796 /* Clean the nid uuids */
799 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
800 sprintf(ptr, "_%x", i);
801 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
804 CERROR("del MDC UUID %s failed: rc = %d\n",
807 OBD_FREE(niduuid, len);
808 /* class_import_put will get rid of the additional connections */
811 mutex_up(&mgc_start_lock);
815 /* Since there's only one mgc per node, we have to change it's fs to get
816 access to the right disk. */
817 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
819 struct lustre_sb_info *lsi = s2lsi(sb);
823 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
825 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
826 rc = obd_set_info_async(mgc->obd_self_export,
827 strlen("set_fs"), "set_fs",
828 sizeof(*sb), sb, NULL);
830 CERROR("can't set_fs %d\n", rc);
836 static int server_mgc_clear_fs(struct obd_device *mgc)
841 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
843 rc = obd_set_info_async(mgc->obd_self_export,
844 strlen("clear_fs"), "clear_fs",
849 DECLARE_MUTEX(server_start_lock);
851 /* Stop MDS/OSS if nobody is using them */
852 static int server_stop_servers(int lddflags, int lsiflags)
854 struct obd_device *obd = NULL;
855 struct obd_type *type = NULL;
859 mutex_down(&server_start_lock);
861 /* Either an MDT or an OST or neither */
862 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
863 if ((lddflags & LDD_F_SV_TYPE_MDT) &&
864 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
865 /*FIXME pre-rename, should eventually be LUSTRE_MDT_NAME*/
866 type = class_search_type(LUSTRE_MDS_NAME);
868 /* if this was an OST, and there are no more OST's, clean up the OSS */
869 if ((lddflags & LDD_F_SV_TYPE_OST) &&
870 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
871 type = class_search_type(LUSTRE_OST_NAME);
874 if (obd && (!type || !type->typ_refcnt)) {
877 /* obd_fail doesn't mean much on a server obd */
878 err = class_manual_cleanup(obd);
883 mutex_up(&server_start_lock);
888 int server_mti_print(char *title, struct mgs_target_info *mti)
890 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
891 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
892 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
893 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
894 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
895 mti->mti_config_ver, mti->mti_flags);
900 int mti_set_sec_opts(struct mgs_target_info *mti, struct lustre_mount_data *lmd)
904 if (lmd->lmd_sec_mdt == NULL && lmd->lmd_sec_cli == NULL) {
905 /* just let on-disk params do its work. but we have an
906 * assumption that any changes of on-disk data by tune2fs
907 * should lead to server rewrite log.
912 /* filter out existing sec options */
913 s1 = mti->mti_params;
920 if (strncmp(s1, PARAM_SEC_RPC_MDT,
921 sizeof(PARAM_SEC_RPC_MDT) - 1) == 0 ||
922 strncmp(s1, PARAM_SEC_RPC_CLI,
923 sizeof(PARAM_SEC_RPC_CLI) - 1) == 0)
928 s2 = strchr(s1, ' ');
936 memmove(s1, s2, strlen(s2) + 1);
941 /* append sec options from lmd */
942 /* FIXME add flag LDD_F_UPDATE after mountconf start supporting
945 if (lmd->lmd_sec_mdt) {
946 if (strlen(mti->mti_params) + strlen(lmd->lmd_sec_mdt) +
947 sizeof(PARAM_SEC_RPC_MDT) + 1 >= sizeof(mti->mti_params)) {
948 CERROR("security params too big for mti\n");
951 strcat(mti->mti_params, " "PARAM_SEC_RPC_MDT);
952 strcat(mti->mti_params, lmd->lmd_sec_mdt);
953 //mti->mti_flags |= LDD_F_UPDATE;
955 if (lmd->lmd_sec_cli) {
956 if (strlen(mti->mti_params) + strlen(lmd->lmd_sec_cli) +
957 sizeof(PARAM_SEC_RPC_CLI) + 2 > sizeof(mti->mti_params)) {
958 CERROR("security params too big for mti\n");
961 strcat(mti->mti_params, " "PARAM_SEC_RPC_CLI);
962 strcat(mti->mti_params, lmd->lmd_sec_cli);
963 //mti->mti_flags |= LDD_F_UPDATE;
969 static int server_sb2mti(struct super_block *sb, struct mgs_target_info *mti)
971 struct lustre_sb_info *lsi = s2lsi(sb);
972 struct lustre_disk_data *ldd = lsi->lsi_ldd;
973 struct lustre_mount_data *lmd = lsi->lsi_lmd;
974 lnet_process_id_t id;
978 if (!(lsi->lsi_flags & LSI_SERVER))
981 strncpy(mti->mti_fsname, ldd->ldd_fsname,
982 sizeof(mti->mti_fsname));
983 strncpy(mti->mti_svname, ldd->ldd_svname,
984 sizeof(mti->mti_svname));
986 mti->mti_nid_count = 0;
987 while (LNetGetId(i++, &id) != -ENOENT) {
988 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
990 mti->mti_nids[mti->mti_nid_count] = id.nid;
991 mti->mti_nid_count++;
992 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
993 CWARN("Only using first %d nids for %s\n",
994 mti->mti_nid_count, mti->mti_svname);
999 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1000 mti->mti_config_ver = 0;
1001 mti->mti_flags = ldd->ldd_flags;
1002 mti->mti_stripe_index = ldd->ldd_svindex;
1003 memcpy(mti->mti_uuid, ldd->ldd_uuid, sizeof(mti->mti_uuid));
1004 if (strlen(ldd->ldd_params) > sizeof(mti->mti_params)) {
1005 CERROR("params too big for mti\n");
1008 memcpy(mti->mti_params, ldd->ldd_params, sizeof(mti->mti_params));
1010 RETURN(mti_set_sec_opts(mti, lmd));
1013 /* Register an old or new target with the MGS. If needed MGS will construct
1014 startup logs and assign index */
1015 int server_register_target(struct super_block *sb)
1017 struct lustre_sb_info *lsi = s2lsi(sb);
1018 struct obd_device *mgc = lsi->lsi_mgc;
1019 struct lustre_disk_data *ldd = lsi->lsi_ldd;
1020 struct mgs_target_info *mti = NULL;
1026 if (!(lsi->lsi_flags & LSI_SERVER))
1032 rc = server_sb2mti(sb, mti);
1036 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1037 mti->mti_svname, mti->mti_fsname,
1038 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1041 /* Register the target */
1042 /* FIXME use mgc_process_config instead */
1043 rc = obd_set_info_async(mgc->u.cli.cl_mgc_mgsexp,
1044 strlen("register_target"), "register_target",
1045 sizeof(*mti), mti, NULL);
1047 CERROR("registration with the MGS failed (%d)\n", rc);
1051 /* Always update our flags */
1052 ldd->ldd_flags = mti->mti_flags & ~LDD_F_REWRITE_LDD;
1054 /* If this flag is set, it means the MGS wants us to change our
1055 on-disk data. (So far this means just the index.) */
1056 if (mti->mti_flags & LDD_F_REWRITE_LDD) {
1059 CDEBUG(D_MOUNT, "Changing on-disk index from %#x to %#x "
1060 "for %s\n", ldd->ldd_svindex, mti->mti_stripe_index,
1062 ldd->ldd_svindex = mti->mti_stripe_index;
1063 strncpy(ldd->ldd_svname, mti->mti_svname,
1064 sizeof(ldd->ldd_svname));
1065 /* or ldd_make_sv_name(ldd); */
1066 ldd_write(&mgc->obd_lvfs_ctxt, ldd);
1067 err = fsfilt_set_label(mgc, lsi->lsi_srv_mnt->mnt_sb,
1070 CERROR("Label set error %d\n", err);
1071 label = fsfilt_get_label(mgc, lsi->lsi_srv_mnt->mnt_sb);
1073 CDEBUG(D_MOUNT, "Disk label changed to %s\n", label);
1075 /* Flush the new ldd to disk */
1076 fsfilt_sync(mgc, lsi->lsi_srv_mnt->mnt_sb);
1086 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1088 struct obd_device *obd;
1089 struct lustre_sb_info *lsi = s2lsi(sb);
1090 struct config_llog_instance cfg;
1094 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_ldd->ldd_svname);
1097 /* If we're an MDT, make sure the global MDS is running */
1098 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_MDT) {
1099 /* make sure the MDS is started */
1100 mutex_down(&server_start_lock);
1101 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1103 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1104 /* FIXME pre-rename, should eventually be LUSTRE_MDS_NAME */
1106 LUSTRE_MDS_OBDNAME"_uuid",
1109 mutex_up(&server_start_lock);
1110 CERROR("failed to start MDS: %d\n", rc);
1114 mutex_up(&server_start_lock);
1118 /* If we're an OST, make sure the global OSS is running */
1119 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_OST) {
1120 /* make sure OSS is started */
1121 mutex_down(&server_start_lock);
1122 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1124 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1126 LUSTRE_OSS_OBDNAME"_uuid",
1129 mutex_up(&server_start_lock);
1130 CERROR("failed to start OSS: %d\n", rc);
1134 mutex_up(&server_start_lock);
1137 /* Set the mgc fs to our server disk. This allows the MGC
1138 to read and write configs locally. */
1139 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1143 /* Register with MGS */
1144 rc = server_register_target(sb);
1145 if (rc && (lsi->lsi_ldd->ldd_flags &
1146 (LDD_F_NEED_INDEX | LDD_F_UPDATE | LDD_F_UPGRADE14))){
1147 CERROR("Required registration failed for %s: %d\n",
1148 lsi->lsi_ldd->ldd_svname, rc);
1150 LCONSOLE_ERROR_MSG(0x15f, "Communication error with "
1151 "the MGS. Is the MGS running?\n");
1155 if (rc == -EINVAL) {
1156 LCONSOLE_ERROR_MSG(0x160, "The MGS is refusing to allow this "
1157 "server (%s) to start. Please see messages"
1158 " on the MGS node.\n",
1159 lsi->lsi_ldd->ldd_svname);
1163 /* Let the target look up the mount using the target's name
1164 (we can't pass the sb or mnt through class_process_config.) */
1165 rc = server_register_mount(lsi->lsi_ldd->ldd_svname, sb, mnt);
1169 /* Start targets using the llog named for the target */
1170 memset(&cfg, 0, sizeof(cfg));
1171 rc = lustre_process_log(sb, lsi->lsi_ldd->ldd_svname, &cfg);
1173 CERROR("failed to start server %s: %d\n",
1174 lsi->lsi_ldd->ldd_svname, rc);
1179 /* Release the mgc fs for others to use */
1180 server_mgc_clear_fs(lsi->lsi_mgc);
1183 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1185 CERROR("no server named %s was started\n",
1186 lsi->lsi_ldd->ldd_svname);
1190 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1191 (OBP(obd, iocontrol))) {
1192 obd_iocontrol(OBD_IOC_ABORT_RECOVERY,
1193 obd->obd_self_export, 0, NULL, NULL);
1196 /* log has been fully processed */
1197 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1203 /***************** lustre superblock **************/
1205 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1207 struct lustre_sb_info *lsi = NULL;
1210 OBD_ALLOC(lsi, sizeof(*lsi));
1213 OBD_ALLOC(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1214 if (!lsi->lsi_lmd) {
1215 OBD_FREE(lsi, sizeof(*lsi));
1219 lsi->lsi_lmd->lmd_exclude_count = 0;
1220 s2lsi_nocast(sb) = lsi;
1221 /* we take 1 extra ref for our setup */
1222 atomic_set(&lsi->lsi_mounts, 1);
1224 /* Default umount style */
1225 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1227 lsi->lsi_lmd->lmd_nllu = NOBODY_UID;
1228 lsi->lsi_lmd->lmd_nllg = NOBODY_GID;
1232 static int lustre_free_lsi(struct super_block *sb)
1234 struct lustre_sb_info *lsi = s2lsi(sb);
1240 CDEBUG(D_MOUNT, "Freeing lsi\n");
1242 /* someone didn't call server_put_mount. */
1243 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
1245 if (lsi->lsi_ldd != NULL)
1246 OBD_FREE(lsi->lsi_ldd, sizeof(*lsi->lsi_ldd));
1248 if (lsi->lsi_lmd != NULL) {
1249 if (lsi->lsi_lmd->lmd_dev != NULL)
1250 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1251 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1252 if (lsi->lsi_lmd->lmd_profile != NULL)
1253 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1254 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1255 if (lsi->lsi_lmd->lmd_sec_mdt != NULL)
1256 OBD_FREE(lsi->lsi_lmd->lmd_sec_mdt,
1257 strlen(lsi->lsi_lmd->lmd_sec_mdt) + 1);
1258 if (lsi->lsi_lmd->lmd_sec_cli != NULL)
1259 OBD_FREE(lsi->lsi_lmd->lmd_sec_cli,
1260 strlen(lsi->lsi_lmd->lmd_sec_cli) + 1);
1261 if (lsi->lsi_lmd->lmd_opts != NULL)
1262 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1263 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1264 if (lsi->lsi_lmd->lmd_exclude_count)
1265 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1266 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1267 lsi->lsi_lmd->lmd_exclude_count);
1268 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1271 LASSERT(lsi->lsi_llsbi == NULL);
1272 OBD_FREE(lsi, sizeof(*lsi));
1273 s2lsi_nocast(sb) = NULL;
1278 /* The lsi has one reference for every server that is using the disk -
1279 e.g. MDT, MGS, and potentially MGC */
1280 static int lustre_put_lsi(struct super_block *sb)
1282 struct lustre_sb_info *lsi = s2lsi(sb);
1287 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
1289 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
1290 lustre_free_lsi(sb);
1296 /*************** server mount ******************/
1298 /* Kernel mount using mount options in MOUNT_DATA_FILE */
1299 static struct vfsmount *server_kernel_mount(struct super_block *sb)
1301 struct lvfs_run_ctxt mount_ctxt;
1302 struct lustre_sb_info *lsi = s2lsi(sb);
1303 struct lustre_disk_data *ldd;
1304 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1305 struct vfsmount *mnt;
1306 char *options = NULL;
1307 unsigned long page, s_flags;
1308 struct page *__page;
1312 OBD_ALLOC(ldd, sizeof(*ldd));
1314 RETURN(ERR_PTR(-ENOMEM));
1316 /* In the past, we have always used flags = 0.
1317 Note ext3/ldiskfs can't be mounted ro. */
1318 s_flags = sb->s_flags;
1320 /* Pre-mount ldiskfs to read the MOUNT_DATA_FILE */
1321 CDEBUG(D_MOUNT, "Pre-mount ldiskfs %s\n", lmd->lmd_dev);
1322 mnt = ll_kern_mount("ldiskfs", s_flags, lmd->lmd_dev, 0);
1325 CERROR("premount %s:%#lx ldiskfs failed: %d "
1326 "Is the ldiskfs module available?\n",
1327 lmd->lmd_dev, s_flags, rc );
1331 OBD_SET_CTXT_MAGIC(&mount_ctxt);
1332 mount_ctxt.pwdmnt = mnt;
1333 mount_ctxt.pwd = mnt->mnt_root;
1334 mount_ctxt.fs = get_ds();
1336 rc = ldd_parse(&mount_ctxt, ldd);
1340 CERROR("premount parse options failed: rc = %d\n", rc);
1344 /* Done with our pre-mount, now do the real mount. */
1346 /* Glom up mount options */
1347 OBD_PAGE_ALLOC(__page, CFS_ALLOC_STD);
1349 GOTO(out_free, rc = -ENOMEM);
1350 page = (unsigned long)cfs_page_address(__page);
1352 options = (char *)page;
1353 memset(options, 0, CFS_PAGE_SIZE);
1354 strncpy(options, ldd->ldd_mount_opts, CFS_PAGE_SIZE - 2);
1356 /* Add in any mount-line options */
1357 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0)) {
1358 int len = CFS_PAGE_SIZE - strlen(options) - 2;
1360 strcat(options, ",");
1361 strncat(options, lmd->lmd_opts, len);
1364 /* Special permanent mount flags */
1366 s_flags |= MS_NOATIME | MS_NODIRATIME;
1368 CDEBUG(D_MOUNT, "kern_mount: %s %s %s\n",
1369 MT_STR(ldd), lmd->lmd_dev, options);
1370 mnt = ll_kern_mount(MT_STR(ldd), s_flags, lmd->lmd_dev,
1372 OBD_PAGE_FREE(__page);
1375 CERROR("ll_kern_mount failed: rc = %d\n", rc);
1379 lsi->lsi_ldd = ldd; /* freed at lsi cleanup */
1380 CDEBUG(D_SUPER, "%s: mnt = %p\n", lmd->lmd_dev, mnt);
1384 OBD_FREE(ldd, sizeof(*ldd));
1385 lsi->lsi_ldd = NULL;
1386 RETURN(ERR_PTR(rc));
1389 static void server_wait_finished(struct vfsmount *mnt)
1391 wait_queue_head_t waitq;
1392 struct l_wait_info lwi;
1395 init_waitqueue_head(&waitq);
1397 while ((atomic_read(&mnt->mnt_count) > 1) && (retries > 0)) {
1398 LCONSOLE_WARN("Mount still busy with %d refs, waiting for "
1400 atomic_read(&mnt->mnt_count), retries);
1402 /* Wait for a bit */
1404 lwi = LWI_TIMEOUT(5 * HZ, NULL, NULL);
1405 l_wait_event(waitq, 0, &lwi);
1407 if (atomic_read(&mnt->mnt_count) > 1) {
1408 CERROR("Mount %p is still busy (%d refs), giving up.\n",
1409 mnt, atomic_read(&mnt->mnt_count));
1413 static void server_put_super(struct super_block *sb)
1415 struct lustre_sb_info *lsi = s2lsi(sb);
1416 struct obd_device *obd;
1417 struct vfsmount *mnt = lsi->lsi_srv_mnt;
1418 char *tmpname, *extraname = NULL;
1420 int lddflags = lsi->lsi_ldd->ldd_flags;
1421 int lsiflags = lsi->lsi_flags;
1425 LASSERT(lsiflags & LSI_SERVER);
1427 tmpname_sz = strlen(lsi->lsi_ldd->ldd_svname) + 1;
1428 OBD_ALLOC(tmpname, tmpname_sz);
1429 memcpy(tmpname, lsi->lsi_ldd->ldd_svname, tmpname_sz);
1430 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1432 /* Stop the target */
1433 if (IS_MDT(lsi->lsi_ldd) || IS_OST(lsi->lsi_ldd)) {
1434 struct lustre_profile *lprof = NULL;
1436 /* tell the mgc to drop the config log */
1437 lustre_end_log(sb, lsi->lsi_ldd->ldd_svname, NULL);
1439 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1440 If there are any setup/cleanup errors, save the lov
1441 name for safety cleanup later. */
1442 lprof = class_get_profile(lsi->lsi_ldd->ldd_svname);
1443 if (lprof && lprof->lp_dt) {
1444 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1445 strcpy(extraname, lprof->lp_dt);
1448 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1450 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1451 if (lsi->lsi_flags & LSI_UMOUNT_FORCE)
1453 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
1455 /* We can't seem to give an error return code
1456 to .put_super, so we better make sure we clean up! */
1458 class_manual_cleanup(obd);
1460 CERROR("no obd %s\n", lsi->lsi_ldd->ldd_svname);
1461 server_deregister_mount(lsi->lsi_ldd->ldd_svname);
1465 /* If they wanted the mgs to stop separately from the mdt, they
1466 should have put it on a different device. */
1467 if (IS_MGS(lsi->lsi_ldd)) {
1468 /* stop the mgc before the mgs so the connection gets cleaned
1470 lustre_stop_mgc(sb);
1471 server_stop_mgs(sb);
1474 /* Clean the mgc and sb */
1475 rc = lustre_common_put_super(sb);
1476 /* FIXME how can I report a failure to umount? */
1478 /* Wait for the targets to really clean up - can't exit (and let the
1479 sb get destroyed) while the mount is still in use */
1480 server_wait_finished(mnt);
1482 /* drop the One True Mount */
1485 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1486 until the target is really gone so that our type refcount check
1488 server_stop_servers(lddflags, lsiflags);
1490 /* In case of startup or cleanup err, stop related obds */
1492 obd = class_name2obd(extraname);
1494 CWARN("Cleaning orphaned obd %s\n", extraname);
1496 class_manual_cleanup(obd);
1498 OBD_FREE(extraname, strlen(extraname) + 1);
1501 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1502 OBD_FREE(tmpname, tmpname_sz);
1506 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1507 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
1509 struct super_block *sb = vfsmnt->mnt_sb;
1511 static void server_umount_begin(struct super_block *sb)
1514 struct lustre_sb_info *lsi = s2lsi(sb);
1517 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1518 if (!(flags & MNT_FORCE)) {
1524 CDEBUG(D_MOUNT, "umount -f\n");
1525 /* umount = failover
1527 no third way to do non-force, non-failover */
1528 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1529 lsi->lsi_flags |= LSI_UMOUNT_FORCE;
1533 #ifndef HAVE_STATFS_DENTRY_PARAM
1534 static int server_statfs (struct super_block *sb, struct kstatfs *buf)
1537 static int server_statfs (struct dentry *dentry, struct kstatfs *buf)
1539 struct super_block *sb = dentry->d_sb;
1541 struct vfsmount *mnt = s2lsi(sb)->lsi_srv_mnt;
1544 if (mnt && mnt->mnt_sb && mnt->mnt_sb->s_op->statfs) {
1545 #ifdef HAVE_STATFS_DENTRY_PARAM
1546 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_root, buf);
1548 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_sb, buf);
1551 buf->f_type = sb->s_magic;
1557 buf->f_type = sb->s_magic;
1558 buf->f_bsize = sb->s_blocksize;
1564 buf->f_namelen = NAME_MAX;
1568 static struct super_operations server_ops =
1570 .put_super = server_put_super,
1571 .umount_begin = server_umount_begin, /* umount -f */
1572 .statfs = server_statfs,
1575 #define log2(n) ffz(~(n))
1576 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1578 static int server_fill_super_common(struct super_block *sb)
1580 struct inode *root = 0;
1583 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1585 sb->s_blocksize = 4096;
1586 sb->s_blocksize_bits = log2(sb->s_blocksize);
1587 sb->s_magic = LUSTRE_SUPER_MAGIC;
1588 sb->s_maxbytes = 0; //PAGE_CACHE_MAXBYTES;
1589 sb->s_flags |= MS_RDONLY;
1590 sb->s_op = &server_ops;
1592 root = new_inode(sb);
1594 CERROR("Can't make root inode\n");
1598 /* returns -EIO for every operation */
1599 /* make_bad_inode(root); -- badness - can't umount */
1600 /* apparently we need to be a directory for the mount to finish */
1601 root->i_mode = S_IFDIR;
1603 sb->s_root = d_alloc_root(root);
1605 CERROR("Can't make root dentry\n");
1613 static int server_fill_super(struct super_block *sb)
1615 struct lustre_sb_info *lsi = s2lsi(sb);
1616 struct vfsmount *mnt;
1620 /* the One True Mount */
1621 mnt = server_kernel_mount(sb);
1624 CERROR("Unable to mount device %s: %d\n",
1625 lsi->lsi_lmd->lmd_dev, rc);
1629 lsi->lsi_srv_mnt = mnt;
1631 LASSERT(lsi->lsi_ldd);
1632 CDEBUG(D_MOUNT, "Found service %s for fs '%s' on device %s\n",
1633 lsi->lsi_ldd->ldd_svname, lsi->lsi_ldd->ldd_fsname,
1634 lsi->lsi_lmd->lmd_dev);
1636 if (class_name2obd(lsi->lsi_ldd->ldd_svname)) {
1637 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1638 "running. Double-mount may have compromised"
1639 " the disk journal.\n",
1640 lsi->lsi_ldd->ldd_svname);
1643 GOTO(out, rc = -EALREADY);
1646 /* start MGS before MGC */
1647 if (IS_MGS(lsi->lsi_ldd)) {
1648 rc = server_start_mgs(sb);
1653 rc = lustre_start_mgc(sb);
1657 /* Set up all obd devices for service */
1658 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1659 (IS_OST(lsi->lsi_ldd) || IS_MDT(lsi->lsi_ldd))) {
1660 rc = server_start_targets(sb, mnt);
1662 CERROR("Unable to start targets: %d\n", rc);
1665 /* FIXME overmount client here,
1666 or can we just start a client log and client_fill_super on this sb?
1667 We need to make sure server_put_super gets called too - ll_put_super
1668 calls lustre_common_put_super; check there for LSI_SERVER flag,
1670 Probably should start client from new thread so we can return.
1671 Client will not finish until all servers are connected.
1672 Note - MGS-only server does NOT get a client, since there is no
1673 lustre fs associated - the MGS is for all lustre fs's */
1676 rc = server_fill_super_common(sb);
1680 LCONSOLE_WARN("Server %s on device %s has started\n",
1681 lsi->lsi_ldd->ldd_svname, lsi->lsi_lmd->lmd_dev);
1686 server_put_super(sb);
1691 /* Get the index from the obd name.
1692 rc = server type, or
1694 if endptr isn't NULL it is set to end of name */
1695 int server_name2index(char *svname, __u32 *idx, char **endptr)
1697 unsigned long index;
1699 char *dash = strchr(svname, '-');
1703 if (strncmp(dash + 1, "MDT", 3) == 0)
1704 rc = LDD_F_SV_TYPE_MDT;
1705 else if (strncmp(dash + 1, "OST", 3) == 0)
1706 rc = LDD_F_SV_TYPE_OST;
1710 index = simple_strtoul(dash + 4, endptr, 16);
1715 /*************** mount common betweeen server and client ***************/
1718 int lustre_common_put_super(struct super_block *sb)
1723 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
1725 /* Drop a ref to the MGC */
1726 rc = lustre_stop_mgc(sb);
1727 if (rc && (rc != -ENOENT)) {
1729 CERROR("Can't stop MGC: %d\n", rc);
1732 /* BUSY just means that there's some other obd that
1733 needs the mgc. Let him clean it up. */
1734 CDEBUG(D_MOUNT, "MGC still in use\n");
1736 /* Drop a ref to the mounted disk */
1742 static void lmd_print(struct lustre_mount_data *lmd)
1746 PRINT_CMD(PRINT_MASK, " mount data:\n");
1747 if (lmd_is_client(lmd))
1748 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
1749 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
1750 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
1751 if (lmd->lmd_sec_mdt)
1752 PRINT_CMD(PRINT_MASK, "sec_mdt: %s\n", lmd->lmd_sec_mdt);
1753 if (lmd->lmd_sec_cli)
1754 PRINT_CMD(PRINT_MASK, "sec_cli: %s\n", lmd->lmd_sec_cli);
1756 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
1757 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1758 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
1759 lmd->lmd_exclude[i]);
1764 /* Is this server on the exclusion list */
1765 int lustre_check_exclusion(struct super_block *sb, char *svname)
1767 struct lustre_sb_info *lsi = s2lsi(sb);
1768 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1773 rc = server_name2index(svname, &index, NULL);
1774 if (rc != LDD_F_SV_TYPE_OST)
1775 /* Only exclude OSTs */
1778 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1779 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1781 for(i = 0; i < lmd->lmd_exclude_count; i++) {
1782 if (index == lmd->lmd_exclude[i]) {
1783 CWARN("Excluding %s (on exclusion list)\n", svname);
1790 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1791 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
1793 char *s1 = ptr, *s2;
1794 __u32 index, *exclude_list;
1798 /* The shortest an ost name can be is 8 chars: -OST0000.
1799 We don't actually know the fsname at this time, so in fact
1800 a user could specify any fsname. */
1801 devmax = strlen(ptr) / 8 + 1;
1803 /* temp storage until we figure out how many we have */
1804 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
1808 /* we enter this fn pointing at the '=' */
1809 while (*s1 && *s1 != ' ' && *s1 != ',') {
1811 rc = server_name2index(s1, &index, &s2);
1813 CERROR("Can't parse server name '%s'\n", s1);
1816 if (rc == LDD_F_SV_TYPE_OST)
1817 exclude_list[lmd->lmd_exclude_count++] = index;
1819 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
1821 /* now we are pointing at ':' (next exclude)
1822 or ',' (end of excludes) */
1823 if (lmd->lmd_exclude_count >= devmax)
1826 if (rc >= 0) /* non-err */
1829 if (lmd->lmd_exclude_count) {
1830 /* permanent, freed in lustre_free_lsi */
1831 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1832 lmd->lmd_exclude_count);
1833 if (lmd->lmd_exclude) {
1834 memcpy(lmd->lmd_exclude, exclude_list,
1835 sizeof(index) * lmd->lmd_exclude_count);
1838 lmd->lmd_exclude_count = 0;
1841 OBD_FREE(exclude_list, sizeof(index) * devmax);
1846 int lmd_set_sec_opts(char **set, char *opts, int length)
1849 OBD_FREE(*set, strlen(*set) + 1);
1851 OBD_ALLOC(*set, length + 1);
1855 memcpy(*set, opts, length);
1856 (*set)[length] = '\0';
1862 int lmd_parse_sec_opts(struct lustre_mount_data *lmd, char *ptr)
1868 /* check peer name */
1869 if (strncmp(ptr, "sec_mdt=", 8) == 0) {
1870 set = &lmd->lmd_sec_mdt;
1872 } else if (strncmp(ptr, "sec_cli=", 8) == 0) {
1873 set = &lmd->lmd_sec_cli;
1875 } else if (strncmp(ptr, "sec=", 4) == 0) {
1876 /* leave 'set' be null */
1879 CERROR("invalid security options: %s\n", ptr);
1883 tail = strchr(ptr, ',');
1885 length = strlen(ptr);
1887 length = tail - ptr;
1890 if (lmd_set_sec_opts(set, ptr, length))
1893 if (lmd->lmd_sec_mdt == NULL &&
1894 lmd_set_sec_opts(&lmd->lmd_sec_mdt, ptr, length))
1897 if (lmd->lmd_sec_cli == NULL &&
1898 lmd_set_sec_opts(&lmd->lmd_sec_cli, ptr, length))
1905 /* mount -v -t lustre uml1:uml2:/lustre-client /mnt/lustre */
1906 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1908 char *s1, *s2, *devname = NULL;
1909 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1915 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1916 "/sbin/mount.lustre is installed.\n");
1920 /* Options should be a string - try to detect old lmd data */
1921 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1922 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1923 "/sbin/mount.lustre. Please install "
1924 "version %s\n", LUSTRE_VERSION_STRING);
1927 lmd->lmd_magic = LMD_MAGIC;
1929 /* Set default flags here */
1934 /* Skip whitespace and extra commas */
1935 while (*s1 == ' ' || *s1 == ',')
1938 /* Client options are parsed in ll_options: eg. flock,
1941 /* Parse non-ldiskfs options here. Rather than modifying
1942 ldiskfs, we just zero these out here */
1943 if (strncmp(s1, "abort_recov", 11) == 0) {
1944 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1946 } else if (strncmp(s1, "nosvc", 5) == 0) {
1947 lmd->lmd_flags |= LMD_FLG_NOSVC;
1949 /* ost exclusion list */
1950 } else if (strncmp(s1, "exclude=", 8) == 0) {
1951 rc = lmd_make_exclusion(lmd, s1 + 7);
1955 } else if (strncmp(s1, "nllu=", 5) == 0) {
1956 lmd->lmd_nllu = simple_strtoul(s1 + 5, NULL, 10);
1958 } else if (strncmp(s1, "nllg=", 5) == 0) {
1959 lmd->lmd_nllg = simple_strtoul(s1 + 5, NULL, 10);
1961 } else if (strncmp(s1, "sec", 3) == 0) {
1962 rc = lmd_parse_sec_opts(lmd, s1);
1967 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1968 end of the options. */
1969 else if (strncmp(s1, "device=", 7) == 0) {
1971 /* terminate options right before device. device
1972 must be the last one. */
1978 s2 = strchr(s1, ',');
1986 memmove(s1, s2, strlen(s2) + 1);
1992 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1993 "(need mount option 'device=...')\n");
1997 s1 = strrchr(devname, ':');
1999 lmd->lmd_flags = LMD_FLG_CLIENT;
2000 /* Remove leading /s from fsname */
2001 while (*++s1 == '/') ;
2002 /* Freed in lustre_free_lsi */
2003 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2004 if (!lmd->lmd_profile)
2006 sprintf(lmd->lmd_profile, "%s-client", s1);
2009 /* Freed in lustre_free_lsi */
2010 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2013 strcpy(lmd->lmd_dev, devname);
2015 /* Save mount options */
2016 s1 = options + strlen(options) - 1;
2017 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2019 if (*options != 0) {
2020 /* Freed in lustre_free_lsi */
2021 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2024 strcpy(lmd->lmd_opts, options);
2027 lmd->lmd_magic = LMD_MAGIC;
2032 CERROR("Bad mount options %s\n", options);
2038 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2040 struct lustre_mount_data *lmd;
2041 struct lustre_sb_info *lsi;
2045 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2047 lsi = lustre_init_lsi(sb);
2052 /* Figure out the lmd from the mount options */
2053 if (lmd_parse((char *)data, lmd)) {
2058 if (lmd_is_client(lmd)) {
2059 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2060 if (!client_fill_super) {
2061 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2062 "client mount! Is the 'lustre' "
2063 "module loaded?\n");
2066 rc = lustre_start_mgc(sb);
2068 lustre_stop_mgc(sb);
2071 /* Connect and start */
2072 /* (should always be ll_fill_super) */
2073 rc = (*client_fill_super)(sb);
2074 /* c_f_s will call lustre_common_put_super on failure */
2077 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2078 lsi->lsi_flags |= LSI_SERVER;
2079 rc = server_fill_super(sb);
2080 /* s_f_s calls lustre_start_mgc after the mount because we need
2081 the MGS nids which are stored on disk. Plus, we may
2082 need to start the MGS first. */
2083 /* s_f_s will call server_put_super on failure */
2088 CERROR("Unable to mount %s (%d)\n",
2089 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2091 CDEBUG(D_SUPER, "mount %s complete\n", lmd->lmd_dev);
2097 /* We can't call ll_fill_super by name because it lives in a module that
2098 must be loaded after this one. */
2099 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb))
2101 client_fill_super = cfs;
2104 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
2106 kill_super_cb = cfs;
2109 /***************** FS registration ******************/
2111 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
2112 struct super_block * lustre_get_sb(struct file_system_type *fs_type,
2113 int flags, const char *devname, void * data)
2115 /* calls back in fill super */
2116 /* we could append devname= onto options (*data) here,
2117 but 2.4 doesn't get devname. So we do it in mount_lustre.c */
2118 return get_sb_nodev(fs_type, flags, data, lustre_fill_super);
2121 int lustre_get_sb(struct file_system_type *fs_type,
2122 int flags, const char *devname, void * data,
2123 struct vfsmount *mnt)
2125 /* calls back in fill super */
2126 /* we could append devname= onto options (*data) here,
2127 but 2.4 doesn't get devname. So we do it in mount_lustre.c */
2128 return get_sb_nodev(fs_type, flags, data, lustre_fill_super, mnt);
2132 void lustre_kill_super(struct super_block *sb)
2134 struct lustre_sb_info *lsi = s2lsi(sb);
2136 if (kill_super_cb && lsi &&(lsi->lsi_flags & LSI_SERVER))
2137 (*kill_super_cb)(sb);
2139 kill_anon_super(sb);
2142 struct file_system_type lustre_fs_type = {
2143 .owner = THIS_MODULE,
2145 .get_sb = lustre_get_sb,
2146 .kill_sb = lustre_kill_super,
2147 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV,
2150 int lustre_register_fs(void)
2152 return register_filesystem(&lustre_fs_type);
2155 int lustre_unregister_fs(void)
2157 return unregister_filesystem(&lustre_fs_type);
2160 EXPORT_SYMBOL(lustre_register_client_fill_super);
2161 EXPORT_SYMBOL(lustre_register_kill_super_cb);
2162 EXPORT_SYMBOL(lustre_common_put_super);
2163 EXPORT_SYMBOL(lustre_process_log);
2164 EXPORT_SYMBOL(lustre_end_log);
2165 EXPORT_SYMBOL(server_get_mount);
2166 EXPORT_SYMBOL(server_get_mount_2);
2167 EXPORT_SYMBOL(server_put_mount);
2168 EXPORT_SYMBOL(server_put_mount_2);
2169 EXPORT_SYMBOL(server_register_target);
2170 EXPORT_SYMBOL(server_name2index);
2171 EXPORT_SYMBOL(server_mti_print);
2172 EXPORT_SYMBOL(do_lcfg);