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;
1311 OBD_ALLOC(ldd, sizeof(*ldd));
1313 RETURN(ERR_PTR(-ENOMEM));
1315 /* In the past, we have always used flags = 0.
1316 Note ext3/ldiskfs can't be mounted ro. */
1317 s_flags = sb->s_flags;
1319 /* Pre-mount ldiskfs to read the MOUNT_DATA_FILE */
1320 CDEBUG(D_MOUNT, "Pre-mount ldiskfs %s\n", lmd->lmd_dev);
1321 mnt = ll_kern_mount("ldiskfs", s_flags, lmd->lmd_dev, 0);
1324 CERROR("premount %s:%#lx ldiskfs failed: %d "
1325 "Is the ldiskfs module available?\n",
1326 lmd->lmd_dev, s_flags, rc );
1330 OBD_SET_CTXT_MAGIC(&mount_ctxt);
1331 mount_ctxt.pwdmnt = mnt;
1332 mount_ctxt.pwd = mnt->mnt_root;
1333 mount_ctxt.fs = get_ds();
1335 rc = ldd_parse(&mount_ctxt, ldd);
1339 CERROR("premount parse options failed: rc = %d\n", rc);
1343 /* Done with our pre-mount, now do the real mount. */
1345 /* Glom up mount options */
1346 page = __get_free_page(GFP_KERNEL);
1348 GOTO(out_free, rc = -ENOMEM);
1350 options = (char *)page;
1351 memset(options, 0, CFS_PAGE_SIZE);
1352 strncpy(options, ldd->ldd_mount_opts, CFS_PAGE_SIZE - 2);
1354 /* Add in any mount-line options */
1355 if (lmd->lmd_opts && (*(lmd->lmd_opts) != 0)) {
1356 int len = CFS_PAGE_SIZE - strlen(options) - 2;
1358 strcat(options, ",");
1359 strncat(options, lmd->lmd_opts, len);
1362 /* Special permanent mount flags */
1364 s_flags |= MS_NOATIME | MS_NODIRATIME;
1366 CDEBUG(D_MOUNT, "kern_mount: %s %s %s\n",
1367 MT_STR(ldd), lmd->lmd_dev, options);
1368 mnt = ll_kern_mount(MT_STR(ldd), s_flags, lmd->lmd_dev,
1373 CERROR("ll_kern_mount failed: rc = %d\n", rc);
1377 lsi->lsi_ldd = ldd; /* freed at lsi cleanup */
1378 CDEBUG(D_SUPER, "%s: mnt = %p\n", lmd->lmd_dev, mnt);
1382 OBD_FREE(ldd, sizeof(*ldd));
1383 lsi->lsi_ldd = NULL;
1384 RETURN(ERR_PTR(rc));
1387 static void server_wait_finished(struct vfsmount *mnt)
1389 wait_queue_head_t waitq;
1390 struct l_wait_info lwi;
1393 init_waitqueue_head(&waitq);
1395 while ((atomic_read(&mnt->mnt_count) > 1) && (retries > 0)) {
1396 LCONSOLE_WARN("Mount still busy with %d refs, waiting for "
1398 atomic_read(&mnt->mnt_count), retries);
1400 /* Wait for a bit */
1402 lwi = LWI_TIMEOUT(5 * HZ, NULL, NULL);
1403 l_wait_event(waitq, 0, &lwi);
1405 if (atomic_read(&mnt->mnt_count) > 1) {
1406 CERROR("Mount %p is still busy (%d refs), giving up.\n",
1407 mnt, atomic_read(&mnt->mnt_count));
1411 static void server_put_super(struct super_block *sb)
1413 struct lustre_sb_info *lsi = s2lsi(sb);
1414 struct obd_device *obd;
1415 struct vfsmount *mnt = lsi->lsi_srv_mnt;
1416 char *tmpname, *extraname = NULL;
1418 int lddflags = lsi->lsi_ldd->ldd_flags;
1419 int lsiflags = lsi->lsi_flags;
1423 LASSERT(lsiflags & LSI_SERVER);
1425 tmpname_sz = strlen(lsi->lsi_ldd->ldd_svname) + 1;
1426 OBD_ALLOC(tmpname, tmpname_sz);
1427 memcpy(tmpname, lsi->lsi_ldd->ldd_svname, tmpname_sz);
1428 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1430 /* Stop the target */
1431 if (IS_MDT(lsi->lsi_ldd) || IS_OST(lsi->lsi_ldd)) {
1432 struct lustre_profile *lprof = NULL;
1434 /* tell the mgc to drop the config log */
1435 lustre_end_log(sb, lsi->lsi_ldd->ldd_svname, NULL);
1437 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1438 If there are any setup/cleanup errors, save the lov
1439 name for safety cleanup later. */
1440 lprof = class_get_profile(lsi->lsi_ldd->ldd_svname);
1441 if (lprof && lprof->lp_dt) {
1442 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1443 strcpy(extraname, lprof->lp_dt);
1446 obd = class_name2obd(lsi->lsi_ldd->ldd_svname);
1448 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1449 if (lsi->lsi_flags & LSI_UMOUNT_FORCE)
1451 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
1453 /* We can't seem to give an error return code
1454 to .put_super, so we better make sure we clean up! */
1456 class_manual_cleanup(obd);
1458 CERROR("no obd %s\n", lsi->lsi_ldd->ldd_svname);
1459 server_deregister_mount(lsi->lsi_ldd->ldd_svname);
1463 /* If they wanted the mgs to stop separately from the mdt, they
1464 should have put it on a different device. */
1465 if (IS_MGS(lsi->lsi_ldd)) {
1466 /* stop the mgc before the mgs so the connection gets cleaned
1468 lustre_stop_mgc(sb);
1469 server_stop_mgs(sb);
1472 /* Clean the mgc and sb */
1473 rc = lustre_common_put_super(sb);
1474 /* FIXME how can I report a failure to umount? */
1476 /* Wait for the targets to really clean up - can't exit (and let the
1477 sb get destroyed) while the mount is still in use */
1478 server_wait_finished(mnt);
1480 /* drop the One True Mount */
1483 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1484 until the target is really gone so that our type refcount check
1486 server_stop_servers(lddflags, lsiflags);
1488 /* In case of startup or cleanup err, stop related obds */
1490 obd = class_name2obd(extraname);
1492 CWARN("Cleaning orphaned obd %s\n", extraname);
1494 class_manual_cleanup(obd);
1496 OBD_FREE(extraname, strlen(extraname) + 1);
1499 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1500 OBD_FREE(tmpname, tmpname_sz);
1504 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1505 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
1507 struct super_block *sb = vfsmnt->mnt_sb;
1509 static void server_umount_begin(struct super_block *sb)
1512 struct lustre_sb_info *lsi = s2lsi(sb);
1515 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1516 if (!(flags & MNT_FORCE)) {
1522 CDEBUG(D_MOUNT, "umount -f\n");
1523 /* umount = failover
1525 no third way to do non-force, non-failover */
1526 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1527 lsi->lsi_flags |= LSI_UMOUNT_FORCE;
1531 #ifndef HAVE_STATFS_DENTRY_PARAM
1532 static int server_statfs (struct super_block *sb, struct kstatfs *buf)
1535 static int server_statfs (struct dentry *dentry, struct kstatfs *buf)
1537 struct super_block *sb = dentry->d_sb;
1539 struct vfsmount *mnt = s2lsi(sb)->lsi_srv_mnt;
1542 if (mnt && mnt->mnt_sb && mnt->mnt_sb->s_op->statfs) {
1543 #ifdef HAVE_STATFS_DENTRY_PARAM
1544 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_root, buf);
1546 int rc = mnt->mnt_sb->s_op->statfs(mnt->mnt_sb, buf);
1549 buf->f_type = sb->s_magic;
1555 buf->f_type = sb->s_magic;
1556 buf->f_bsize = sb->s_blocksize;
1562 buf->f_namelen = NAME_MAX;
1566 static struct super_operations server_ops =
1568 .put_super = server_put_super,
1569 .umount_begin = server_umount_begin, /* umount -f */
1570 .statfs = server_statfs,
1573 #define log2(n) ffz(~(n))
1574 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1576 static int server_fill_super_common(struct super_block *sb)
1578 struct inode *root = 0;
1581 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1583 sb->s_blocksize = 4096;
1584 sb->s_blocksize_bits = log2(sb->s_blocksize);
1585 sb->s_magic = LUSTRE_SUPER_MAGIC;
1586 sb->s_maxbytes = 0; //PAGE_CACHE_MAXBYTES;
1587 sb->s_flags |= MS_RDONLY;
1588 sb->s_op = &server_ops;
1590 root = new_inode(sb);
1592 CERROR("Can't make root inode\n");
1596 /* returns -EIO for every operation */
1597 /* make_bad_inode(root); -- badness - can't umount */
1598 /* apparently we need to be a directory for the mount to finish */
1599 root->i_mode = S_IFDIR;
1601 sb->s_root = d_alloc_root(root);
1603 CERROR("Can't make root dentry\n");
1611 static int server_fill_super(struct super_block *sb)
1613 struct lustre_sb_info *lsi = s2lsi(sb);
1614 struct vfsmount *mnt;
1618 /* the One True Mount */
1619 mnt = server_kernel_mount(sb);
1622 CERROR("Unable to mount device %s: %d\n",
1623 lsi->lsi_lmd->lmd_dev, rc);
1627 lsi->lsi_srv_mnt = mnt;
1629 LASSERT(lsi->lsi_ldd);
1630 CDEBUG(D_MOUNT, "Found service %s for fs '%s' on device %s\n",
1631 lsi->lsi_ldd->ldd_svname, lsi->lsi_ldd->ldd_fsname,
1632 lsi->lsi_lmd->lmd_dev);
1634 if (class_name2obd(lsi->lsi_ldd->ldd_svname)) {
1635 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1636 "running. Double-mount may have compromised"
1637 " the disk journal.\n",
1638 lsi->lsi_ldd->ldd_svname);
1641 GOTO(out, rc = -EALREADY);
1644 /* start MGS before MGC */
1645 if (IS_MGS(lsi->lsi_ldd)) {
1646 rc = server_start_mgs(sb);
1651 rc = lustre_start_mgc(sb);
1655 /* Set up all obd devices for service */
1656 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1657 (IS_OST(lsi->lsi_ldd) || IS_MDT(lsi->lsi_ldd))) {
1658 rc = server_start_targets(sb, mnt);
1660 CERROR("Unable to start targets: %d\n", rc);
1663 /* FIXME overmount client here,
1664 or can we just start a client log and client_fill_super on this sb?
1665 We need to make sure server_put_super gets called too - ll_put_super
1666 calls lustre_common_put_super; check there for LSI_SERVER flag,
1668 Probably should start client from new thread so we can return.
1669 Client will not finish until all servers are connected.
1670 Note - MGS-only server does NOT get a client, since there is no
1671 lustre fs associated - the MGS is for all lustre fs's */
1674 rc = server_fill_super_common(sb);
1678 LCONSOLE_WARN("Server %s on device %s has started\n",
1679 lsi->lsi_ldd->ldd_svname, lsi->lsi_lmd->lmd_dev);
1684 server_put_super(sb);
1689 /* Get the index from the obd name.
1690 rc = server type, or
1692 if endptr isn't NULL it is set to end of name */
1693 int server_name2index(char *svname, __u32 *idx, char **endptr)
1695 unsigned long index;
1697 char *dash = strchr(svname, '-');
1701 if (strncmp(dash + 1, "MDT", 3) == 0)
1702 rc = LDD_F_SV_TYPE_MDT;
1703 else if (strncmp(dash + 1, "OST", 3) == 0)
1704 rc = LDD_F_SV_TYPE_OST;
1708 index = simple_strtoul(dash + 4, endptr, 16);
1713 /*************** mount common betweeen server and client ***************/
1716 int lustre_common_put_super(struct super_block *sb)
1721 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
1723 /* Drop a ref to the MGC */
1724 rc = lustre_stop_mgc(sb);
1725 if (rc && (rc != -ENOENT)) {
1727 CERROR("Can't stop MGC: %d\n", rc);
1730 /* BUSY just means that there's some other obd that
1731 needs the mgc. Let him clean it up. */
1732 CDEBUG(D_MOUNT, "MGC still in use\n");
1734 /* Drop a ref to the mounted disk */
1740 static void lmd_print(struct lustre_mount_data *lmd)
1744 PRINT_CMD(PRINT_MASK, " mount data:\n");
1745 if (lmd_is_client(lmd))
1746 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
1747 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
1748 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
1749 if (lmd->lmd_sec_mdt)
1750 PRINT_CMD(PRINT_MASK, "sec_mdt: %s\n", lmd->lmd_sec_mdt);
1751 if (lmd->lmd_sec_cli)
1752 PRINT_CMD(PRINT_MASK, "sec_cli: %s\n", lmd->lmd_sec_cli);
1754 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
1755 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1756 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
1757 lmd->lmd_exclude[i]);
1762 /* Is this server on the exclusion list */
1763 int lustre_check_exclusion(struct super_block *sb, char *svname)
1765 struct lustre_sb_info *lsi = s2lsi(sb);
1766 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1771 rc = server_name2index(svname, &index, NULL);
1772 if (rc != LDD_F_SV_TYPE_OST)
1773 /* Only exclude OSTs */
1776 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1777 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1779 for(i = 0; i < lmd->lmd_exclude_count; i++) {
1780 if (index == lmd->lmd_exclude[i]) {
1781 CWARN("Excluding %s (on exclusion list)\n", svname);
1788 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1789 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
1791 char *s1 = ptr, *s2;
1792 __u32 index, *exclude_list;
1796 /* The shortest an ost name can be is 8 chars: -OST0000.
1797 We don't actually know the fsname at this time, so in fact
1798 a user could specify any fsname. */
1799 devmax = strlen(ptr) / 8 + 1;
1801 /* temp storage until we figure out how many we have */
1802 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
1806 /* we enter this fn pointing at the '=' */
1807 while (*s1 && *s1 != ' ' && *s1 != ',') {
1809 rc = server_name2index(s1, &index, &s2);
1811 CERROR("Can't parse server name '%s'\n", s1);
1814 if (rc == LDD_F_SV_TYPE_OST)
1815 exclude_list[lmd->lmd_exclude_count++] = index;
1817 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
1819 /* now we are pointing at ':' (next exclude)
1820 or ',' (end of excludes) */
1821 if (lmd->lmd_exclude_count >= devmax)
1824 if (rc >= 0) /* non-err */
1827 if (lmd->lmd_exclude_count) {
1828 /* permanent, freed in lustre_free_lsi */
1829 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1830 lmd->lmd_exclude_count);
1831 if (lmd->lmd_exclude) {
1832 memcpy(lmd->lmd_exclude, exclude_list,
1833 sizeof(index) * lmd->lmd_exclude_count);
1836 lmd->lmd_exclude_count = 0;
1839 OBD_FREE(exclude_list, sizeof(index) * devmax);
1844 int lmd_set_sec_opts(char **set, char *opts, int length)
1847 OBD_FREE(*set, strlen(*set) + 1);
1849 OBD_ALLOC(*set, length + 1);
1853 memcpy(*set, opts, length);
1854 (*set)[length] = '\0';
1860 int lmd_parse_sec_opts(struct lustre_mount_data *lmd, char *ptr)
1866 /* check peer name */
1867 if (strncmp(ptr, "sec_mdt=", 8) == 0) {
1868 set = &lmd->lmd_sec_mdt;
1870 } else if (strncmp(ptr, "sec_cli=", 8) == 0) {
1871 set = &lmd->lmd_sec_cli;
1873 } else if (strncmp(ptr, "sec=", 4) == 0) {
1874 /* leave 'set' be null */
1877 CERROR("invalid security options: %s\n", ptr);
1881 tail = strchr(ptr, ',');
1883 length = strlen(ptr);
1885 length = tail - ptr;
1888 if (lmd_set_sec_opts(set, ptr, length))
1891 if (lmd->lmd_sec_mdt == NULL &&
1892 lmd_set_sec_opts(&lmd->lmd_sec_mdt, ptr, length))
1895 if (lmd->lmd_sec_cli == NULL &&
1896 lmd_set_sec_opts(&lmd->lmd_sec_cli, ptr, length))
1903 /* mount -v -t lustre uml1:uml2:/lustre-client /mnt/lustre */
1904 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1906 char *s1, *s2, *devname = NULL;
1907 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1913 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1914 "/sbin/mount.lustre is installed.\n");
1918 /* Options should be a string - try to detect old lmd data */
1919 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1920 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1921 "/sbin/mount.lustre. Please install "
1922 "version %s\n", LUSTRE_VERSION_STRING);
1925 lmd->lmd_magic = LMD_MAGIC;
1927 /* Set default flags here */
1932 /* Skip whitespace and extra commas */
1933 while (*s1 == ' ' || *s1 == ',')
1936 /* Client options are parsed in ll_options: eg. flock,
1939 /* Parse non-ldiskfs options here. Rather than modifying
1940 ldiskfs, we just zero these out here */
1941 if (strncmp(s1, "abort_recov", 11) == 0) {
1942 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1944 } else if (strncmp(s1, "nosvc", 5) == 0) {
1945 lmd->lmd_flags |= LMD_FLG_NOSVC;
1947 /* ost exclusion list */
1948 } else if (strncmp(s1, "exclude=", 8) == 0) {
1949 rc = lmd_make_exclusion(lmd, s1 + 7);
1953 } else if (strncmp(s1, "nllu=", 5) == 0) {
1954 lmd->lmd_nllu = simple_strtoul(s1 + 5, NULL, 10);
1956 } else if (strncmp(s1, "nllg=", 5) == 0) {
1957 lmd->lmd_nllg = simple_strtoul(s1 + 5, NULL, 10);
1959 } else if (strncmp(s1, "sec", 3) == 0) {
1960 rc = lmd_parse_sec_opts(lmd, s1);
1965 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1966 end of the options. */
1967 else if (strncmp(s1, "device=", 7) == 0) {
1969 /* terminate options right before device. device
1970 must be the last one. */
1976 s2 = strchr(s1, ',');
1984 memmove(s1, s2, strlen(s2) + 1);
1990 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1991 "(need mount option 'device=...')\n");
1995 s1 = strrchr(devname, ':');
1997 lmd->lmd_flags = LMD_FLG_CLIENT;
1998 /* Remove leading /s from fsname */
1999 while (*++s1 == '/') ;
2000 /* Freed in lustre_free_lsi */
2001 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2002 if (!lmd->lmd_profile)
2004 sprintf(lmd->lmd_profile, "%s-client", s1);
2007 /* Freed in lustre_free_lsi */
2008 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2011 strcpy(lmd->lmd_dev, devname);
2013 /* Save mount options */
2014 s1 = options + strlen(options) - 1;
2015 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2017 if (*options != 0) {
2018 /* Freed in lustre_free_lsi */
2019 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2022 strcpy(lmd->lmd_opts, options);
2025 lmd->lmd_magic = LMD_MAGIC;
2030 CERROR("Bad mount options %s\n", options);
2036 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2038 struct lustre_mount_data *lmd;
2039 struct lustre_sb_info *lsi;
2043 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2045 lsi = lustre_init_lsi(sb);
2050 /* Figure out the lmd from the mount options */
2051 if (lmd_parse((char *)data, lmd)) {
2056 if (lmd_is_client(lmd)) {
2057 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2058 if (!client_fill_super) {
2059 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2060 "client mount! Is the 'lustre' "
2061 "module loaded?\n");
2064 rc = lustre_start_mgc(sb);
2066 lustre_stop_mgc(sb);
2069 /* Connect and start */
2070 /* (should always be ll_fill_super) */
2071 rc = (*client_fill_super)(sb);
2072 /* c_f_s will call lustre_common_put_super on failure */
2075 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2076 lsi->lsi_flags |= LSI_SERVER;
2077 rc = server_fill_super(sb);
2078 /* s_f_s calls lustre_start_mgc after the mount because we need
2079 the MGS nids which are stored on disk. Plus, we may
2080 need to start the MGS first. */
2081 /* s_f_s will call server_put_super on failure */
2086 CERROR("Unable to mount %s (%d)\n",
2087 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2089 CDEBUG(D_SUPER, "mount %s complete\n", lmd->lmd_dev);
2095 /* We can't call ll_fill_super by name because it lives in a module that
2096 must be loaded after this one. */
2097 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb))
2099 client_fill_super = cfs;
2102 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
2104 kill_super_cb = cfs;
2107 /***************** FS registration ******************/
2109 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
2110 struct super_block * lustre_get_sb(struct file_system_type *fs_type,
2111 int flags, const char *devname, void * data)
2113 /* calls back in fill super */
2114 /* we could append devname= onto options (*data) here,
2115 but 2.4 doesn't get devname. So we do it in mount_lustre.c */
2116 return get_sb_nodev(fs_type, flags, data, lustre_fill_super);
2119 int lustre_get_sb(struct file_system_type *fs_type,
2120 int flags, const char *devname, void * data,
2121 struct vfsmount *mnt)
2123 /* calls back in fill super */
2124 /* we could append devname= onto options (*data) here,
2125 but 2.4 doesn't get devname. So we do it in mount_lustre.c */
2126 return get_sb_nodev(fs_type, flags, data, lustre_fill_super, mnt);
2130 void lustre_kill_super(struct super_block *sb)
2132 struct lustre_sb_info *lsi = s2lsi(sb);
2134 if (kill_super_cb && lsi &&(lsi->lsi_flags & LSI_SERVER))
2135 (*kill_super_cb)(sb);
2137 kill_anon_super(sb);
2140 struct file_system_type lustre_fs_type = {
2141 .owner = THIS_MODULE,
2143 .get_sb = lustre_get_sb,
2144 .kill_sb = lustre_kill_super,
2145 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV,
2148 int lustre_register_fs(void)
2150 return register_filesystem(&lustre_fs_type);
2153 int lustre_unregister_fs(void)
2155 return unregister_filesystem(&lustre_fs_type);
2158 EXPORT_SYMBOL(lustre_register_client_fill_super);
2159 EXPORT_SYMBOL(lustre_register_kill_super_cb);
2160 EXPORT_SYMBOL(lustre_common_put_super);
2161 EXPORT_SYMBOL(lustre_process_log);
2162 EXPORT_SYMBOL(lustre_end_log);
2163 EXPORT_SYMBOL(server_get_mount);
2164 EXPORT_SYMBOL(server_get_mount_2);
2165 EXPORT_SYMBOL(server_put_mount);
2166 EXPORT_SYMBOL(server_put_mount_2);
2167 EXPORT_SYMBOL(server_register_target);
2168 EXPORT_SYMBOL(server_name2index);
2169 EXPORT_SYMBOL(server_mti_print);
2170 EXPORT_SYMBOL(do_lcfg);