4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/obd_mount.c
38 * Client/server mount routines
40 * Author: Nathan Rutman <nathan@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_CLASS
45 #define D_MOUNT D_SUPER|D_CONFIG /*|D_WARNING */
46 #define PRINT_CMD CDEBUG
47 #define PRINT_MASK D_SUPER|D_CONFIG
51 #include <lustre_fsfilt.h>
52 #include <obd_class.h>
53 #include <lustre/lustre_user.h>
54 #include <linux/version.h>
55 #include <lustre_log.h>
56 #include <lustre_disk.h>
57 #include <lustre_param.h>
58 #ifdef HAVE_KERNEL_LOCKED
59 #include <linux/smp_lock.h>
62 static int (*client_fill_super)(struct super_block *sb,
63 struct vfsmount *mnt) = NULL;
64 static void (*kill_super_cb)(struct super_block *sb) = NULL;
66 /*********** mount lookup *********/
68 CFS_DEFINE_MUTEX(lustre_mount_info_lock);
69 static CFS_LIST_HEAD(server_mount_info_list);
71 static struct lustre_mount_info *server_find_mount(const char *name)
74 struct lustre_mount_info *lmi;
77 cfs_list_for_each(tmp, &server_mount_info_list) {
78 lmi = cfs_list_entry(tmp, struct lustre_mount_info,
80 if (strcmp(name, lmi->lmi_name) == 0)
86 /* we must register an obd for a mount before we call the setup routine.
87 *_setup will call lustre_get_mount to get the mnt struct
88 by obd_name, since we can't pass the pointer to setup. */
89 static int server_register_mount(const char *name, struct super_block *sb,
92 struct lustre_mount_info *lmi;
98 OBD_ALLOC(lmi, sizeof(*lmi));
101 OBD_ALLOC(name_cp, strlen(name) + 1);
103 OBD_FREE(lmi, sizeof(*lmi));
106 strcpy(name_cp, name);
108 cfs_mutex_lock(&lustre_mount_info_lock);
110 if (server_find_mount(name)) {
111 cfs_mutex_unlock(&lustre_mount_info_lock);
112 OBD_FREE(lmi, sizeof(*lmi));
113 OBD_FREE(name_cp, strlen(name) + 1);
114 CERROR("Already registered %s\n", name);
117 lmi->lmi_name = name_cp;
120 cfs_list_add(&lmi->lmi_list_chain, &server_mount_info_list);
122 cfs_mutex_unlock(&lustre_mount_info_lock);
124 CDEBUG(D_MOUNT, "reg_mnt %p from %s\n", lmi->lmi_mnt, name);
129 /* when an obd no longer needs a mount */
130 static int server_deregister_mount(const char *name)
132 struct lustre_mount_info *lmi;
135 cfs_mutex_lock(&lustre_mount_info_lock);
136 lmi = server_find_mount(name);
138 cfs_mutex_unlock(&lustre_mount_info_lock);
139 CERROR("%s not registered\n", name);
143 CDEBUG(D_MOUNT, "dereg_mnt %p from %s\n", lmi->lmi_mnt, name);
145 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
146 cfs_list_del(&lmi->lmi_list_chain);
147 OBD_FREE(lmi, sizeof(*lmi));
148 cfs_mutex_unlock(&lustre_mount_info_lock);
153 /* obd's look up a registered mount using their obdname. This is just
154 for initial obd setup to find the mount struct. It should not be
155 called every time you want to mntget. */
156 struct lustre_mount_info *server_get_mount(const char *name)
158 struct lustre_mount_info *lmi;
159 struct lustre_sb_info *lsi;
162 cfs_mutex_lock(&lustre_mount_info_lock);
163 lmi = server_find_mount(name);
164 cfs_mutex_unlock(&lustre_mount_info_lock);
166 CERROR("Can't find mount for %s\n", name);
169 lsi = s2lsi(lmi->lmi_sb);
171 cfs_atomic_inc(&lsi->lsi_mounts);
173 CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d\n", lmi->lmi_mnt,
174 name, cfs_atomic_read(&lsi->lsi_mounts));
178 EXPORT_SYMBOL(server_get_mount);
181 * Used by mdt to get mount_info from obdname.
182 * There are no blocking when using the mount_info.
183 * Do not use server_get_mount for this purpose.
185 struct lustre_mount_info *server_get_mount_2(const char *name)
187 struct lustre_mount_info *lmi;
190 cfs_mutex_lock(&lustre_mount_info_lock);
191 lmi = server_find_mount(name);
192 cfs_mutex_unlock(&lustre_mount_info_lock);
194 CERROR("Can't find mount for %s\n", name);
198 EXPORT_SYMBOL(server_get_mount_2);
200 static int lustre_put_lsi(struct super_block *sb);
202 /* to be called from obd_cleanup methods */
203 int server_put_mount(const char *name, struct vfsmount *mnt)
205 struct lustre_mount_info *lmi;
206 struct lustre_sb_info *lsi;
209 cfs_mutex_lock(&lustre_mount_info_lock);
210 lmi = server_find_mount(name);
211 cfs_mutex_unlock(&lustre_mount_info_lock);
213 CERROR("Can't find mount for %s\n", name);
216 lsi = s2lsi(lmi->lmi_sb);
218 CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d\n",
219 lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts));
221 if (lustre_put_lsi(lmi->lmi_sb))
222 CDEBUG(D_MOUNT, "Last put of mnt %p from %s\n",
225 /* this obd should never need the mount again */
226 server_deregister_mount(name);
230 EXPORT_SYMBOL(server_put_mount);
232 /* Corresponding to server_get_mount_2 */
233 int server_put_mount_2(const char *name, struct vfsmount *mnt)
238 EXPORT_SYMBOL(server_put_mount_2);
240 /**************** config llog ********************/
242 /** Get a config log from the MGS and process it.
243 * This func is called for both clients and servers.
244 * Continue to process new statements appended to the logs
245 * (whenever the config lock is revoked) until lustre_end_log
247 * @param sb The superblock is used by the MGC to write to the local copy of
249 * @param logname The name of the llog to replicate from the MGS
250 * @param cfg Since the same mgc may be used to follow multiple config logs
251 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
252 * this log, and is added to the mgc's list of logs to follow.
254 int lustre_process_log(struct super_block *sb, char *logname,
255 struct config_llog_instance *cfg)
257 struct lustre_cfg *lcfg;
258 struct lustre_cfg_bufs *bufs;
259 struct lustre_sb_info *lsi = s2lsi(sb);
260 struct obd_device *mgc = lsi->lsi_mgc;
271 /* mgc_process_config */
272 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
273 lustre_cfg_bufs_set_string(bufs, 1, logname);
274 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
275 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
276 lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
277 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
278 lustre_cfg_free(lcfg);
283 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
284 "failed from the MGS (%d). Make sure this "
285 "client and the MGS are running compatible "
286 "versions of Lustre.\n",
287 mgc->obd_name, logname, rc);
290 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
291 "failed (%d). This may be the result of "
292 "communication errors between this node and "
293 "the MGS, a bad configuration, or other "
294 "errors. See the syslog for more "
295 "information.\n", mgc->obd_name, logname,
298 /* class_obd_list(); */
301 EXPORT_SYMBOL(lustre_process_log);
303 /* Stop watching this config log for updates */
304 int lustre_end_log(struct super_block *sb, char *logname,
305 struct config_llog_instance *cfg)
307 struct lustre_cfg *lcfg;
308 struct lustre_cfg_bufs bufs;
309 struct lustre_sb_info *lsi = s2lsi(sb);
310 struct obd_device *mgc = lsi->lsi_mgc;
317 /* mgc_process_config */
318 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
319 lustre_cfg_bufs_set_string(&bufs, 1, logname);
321 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
322 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
323 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
324 lustre_cfg_free(lcfg);
327 EXPORT_SYMBOL(lustre_end_log);
329 /**************** obd start *******************/
331 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
332 * lctl (and do for echo cli/srv.
334 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
335 char *s1, char *s2, char *s3, char *s4)
337 struct lustre_cfg_bufs bufs;
338 struct lustre_cfg * lcfg = NULL;
341 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
342 cmd, s1, s2, s3, s4);
344 lustre_cfg_bufs_reset(&bufs, cfgname);
346 lustre_cfg_bufs_set_string(&bufs, 1, s1);
348 lustre_cfg_bufs_set_string(&bufs, 2, s2);
350 lustre_cfg_bufs_set_string(&bufs, 3, s3);
352 lustre_cfg_bufs_set_string(&bufs, 4, s4);
354 lcfg = lustre_cfg_new(cmd, &bufs);
355 lcfg->lcfg_nid = nid;
356 rc = class_process_config(lcfg);
357 lustre_cfg_free(lcfg);
360 EXPORT_SYMBOL(do_lcfg);
362 /** Call class_attach and class_setup. These methods in turn call
363 * obd type-specific methods.
365 static int lustre_start_simple(char *obdname, char *type, char *uuid,
366 char *s1, char *s2, char *s3, char *s4)
369 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
371 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
373 CERROR("%s attach error %d\n", obdname, rc);
376 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
378 CERROR("%s setup error %d\n", obdname, rc);
379 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
384 /* Set up a MGS to serve startup logs */
385 static int server_start_mgs(struct super_block *sb)
387 struct lustre_sb_info *lsi = s2lsi(sb);
388 struct vfsmount *mnt = lsi->lsi_srv_mnt;
389 struct lustre_mount_info *lmi;
394 /* It is impossible to have more than 1 MGS per node, since
395 MGC wouldn't know which to connect to */
396 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
398 lsi = s2lsi(lmi->lmi_sb);
399 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
404 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
406 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
409 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
410 LUSTRE_MGS_OBDNAME, 0, 0, 0, 0);
411 /* Do NOT call server_deregister_mount() here. This leads to
412 * inability cleanup cleanly and free lsi and other stuff when
413 * mgs calls server_put_mount() in error handling case. -umka */
417 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
418 "Is the 'mgs' module loaded?\n",
419 LUSTRE_MGS_OBDNAME, rc);
423 static int server_stop_mgs(struct super_block *sb)
425 struct obd_device *obd;
429 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
431 /* There better be only one MGS */
432 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
434 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
438 /* The MGS should always stop when we say so */
440 rc = class_manual_cleanup(obd);
444 CFS_DEFINE_MUTEX(mgc_start_lock);
446 /** Set up a mgc obd to process startup logs
448 * \param sb [in] super block of the mgc obd
450 * \retval 0 success, otherwise error code
452 static int lustre_start_mgc(struct super_block *sb)
454 struct obd_connect_data *data = NULL;
455 struct lustre_sb_info *lsi = s2lsi(sb);
456 struct obd_device *obd;
457 struct obd_export *exp;
458 struct obd_uuid *uuid;
461 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
464 int rc = 0, i = 0, j, len;
467 LASSERT(lsi->lsi_lmd);
469 /* Find the first non-lo MGS nid for our MGC name */
470 if (IS_SERVER(lsi)) {
471 /* mount -o mgsnode=nid */
472 ptr = lsi->lsi_lmd->lmd_mgs;
473 if (lsi->lsi_lmd->lmd_mgs &&
474 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
476 } else if (IS_MGS(lsi)) {
477 lnet_process_id_t id;
478 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
479 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
486 } else { /* client */
487 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
488 ptr = lsi->lsi_lmd->lmd_dev;
489 if (class_parse_nid(ptr, &nid, &ptr) == 0)
493 CERROR("No valid MGS nids found.\n");
497 cfs_mutex_lock(&mgc_start_lock);
499 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
500 OBD_ALLOC(mgcname, len);
501 OBD_ALLOC(niduuid, len + 2);
502 if (!mgcname || !niduuid)
503 GOTO(out_free, rc = -ENOMEM);
504 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
506 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
510 GOTO(out_free, rc = -ENOMEM);
512 obd = class_name2obd(mgcname);
513 if (obd && !obd->obd_stopping) {
514 rc = obd_set_info_async(NULL, obd->obd_self_export,
515 strlen(KEY_MGSSEC), KEY_MGSSEC,
516 strlen(mgssec), mgssec, NULL);
520 /* Re-using an existing MGC */
521 cfs_atomic_inc(&obd->u.cli.cl_mgc_refcount);
523 /* IR compatibility check, only for clients */
524 if (lmd_is_client(lsi->lsi_lmd)) {
526 int vallen = sizeof(*data);
527 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
529 rc = obd_get_info(NULL, obd->obd_self_export,
530 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
531 &vallen, data, NULL);
533 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
534 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
535 /* LMD_FLG_NOIR is for test purpose only */
537 "Trying to mount a client with IR setting "
538 "not compatible with current mgc. "
539 "Force to use current mgc setting that is "
541 has_ir ? "enabled" : "disabled");
543 *flags &= ~LMD_FLG_NOIR;
545 *flags |= LMD_FLG_NOIR;
550 /* If we are restarting the MGS, don't try to keep the MGC's
551 old connection, or registration will fail. */
553 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
557 /* Try all connections, but only once (again).
558 We don't want to block another target from starting
559 (using its local copy of the log), but we do want to connect
560 if at all possible. */
562 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
563 rc = obd_set_info_async(NULL, obd->obd_self_export,
564 sizeof(KEY_INIT_RECOV_BACKUP),
565 KEY_INIT_RECOV_BACKUP,
566 sizeof(recov_bk), &recov_bk, NULL);
570 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
572 /* Add the primary nids for the MGS */
574 sprintf(niduuid, "%s_%x", mgcname, i);
575 if (IS_SERVER(lsi)) {
576 ptr = lsi->lsi_lmd->lmd_mgs;
578 /* Use local nids (including LO) */
579 lnet_process_id_t id;
580 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
581 rc = do_lcfg(mgcname, id.nid,
582 LCFG_ADD_UUID, niduuid, 0,0,0);
585 /* Use mgsnode= nids */
586 /* mount -o mgsnode=nid */
587 if (lsi->lsi_lmd->lmd_mgs) {
588 ptr = lsi->lsi_lmd->lmd_mgs;
589 } else if (class_find_param(ptr, PARAM_MGSNODE,
591 CERROR("No MGS nids given.\n");
592 GOTO(out_free, rc = -EINVAL);
594 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
595 rc = do_lcfg(mgcname, nid,
596 LCFG_ADD_UUID, niduuid, 0,0,0);
600 } else { /* client */
601 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
602 ptr = lsi->lsi_lmd->lmd_dev;
603 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
604 rc = do_lcfg(mgcname, nid,
605 LCFG_ADD_UUID, niduuid, 0,0,0);
607 /* Stop at the first failover nid */
613 CERROR("No valid MGS nids found.\n");
614 GOTO(out_free, rc = -EINVAL);
616 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
618 /* Random uuid for MGC allows easier reconnects */
620 ll_generate_random_uuid(uuidc);
621 class_uuid_unparse(uuidc, uuid);
624 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
625 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
631 /* Add any failover MGS nids */
633 while (ptr && ((*ptr == ':' ||
634 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
635 /* New failover node */
636 sprintf(niduuid, "%s_%x", mgcname, i);
638 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
640 rc = do_lcfg(mgcname, nid,
641 LCFG_ADD_UUID, niduuid, 0,0,0);
646 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
654 lsi->lsi_lmd->lmd_mgs_failnodes = i;
656 obd = class_name2obd(mgcname);
658 CERROR("Can't find mgcobd %s\n", mgcname);
659 GOTO(out_free, rc = -ENOTCONN);
662 rc = obd_set_info_async(NULL, obd->obd_self_export,
663 strlen(KEY_MGSSEC), KEY_MGSSEC,
664 strlen(mgssec), mgssec, NULL);
668 /* Keep a refcount of servers/clients who started with "mount",
669 so we know when we can get rid of the mgc. */
670 cfs_atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
672 /* Try all connections, but only once. */
674 rc = obd_set_info_async(NULL, obd->obd_self_export,
675 sizeof(KEY_INIT_RECOV_BACKUP),
676 KEY_INIT_RECOV_BACKUP,
677 sizeof(recov_bk), &recov_bk, NULL);
680 CWARN("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
682 /* We connect to the MGS at setup, and don't disconnect until cleanup */
683 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
684 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV;
686 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
687 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
689 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
692 if (lmd_is_client(lsi->lsi_lmd) &&
693 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
694 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
695 data->ocd_version = LUSTRE_VERSION_CODE;
696 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
698 CERROR("connect failed %d\n", rc);
702 obd->u.cli.cl_mgc_mgsexp = exp;
705 /* Keep the mgc info in the sb. Note that many lsi's can point
709 cfs_mutex_unlock(&mgc_start_lock);
714 OBD_FREE(mgcname, len);
716 OBD_FREE(niduuid, len + 2);
720 static int lustre_stop_mgc(struct super_block *sb)
722 struct lustre_sb_info *lsi = s2lsi(sb);
723 struct obd_device *obd;
724 char *niduuid = 0, *ptr = 0;
725 int i, rc = 0, len = 0;
735 cfs_mutex_lock(&mgc_start_lock);
736 LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
737 if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
738 /* This is not fatal, every client that stops
739 will call in here. */
740 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
741 cfs_atomic_read(&obd->u.cli.cl_mgc_refcount));
742 GOTO(out, rc = -EBUSY);
745 /* The MGC has no recoverable data in any case.
746 * force shotdown set in umount_begin */
747 obd->obd_no_recov = 1;
749 if (obd->u.cli.cl_mgc_mgsexp) {
750 /* An error is not fatal, if we are unable to send the
751 disconnect mgs ping evictor cleans up the export */
752 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
754 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
757 /* Save the obdname for cleaning the nid uuids, which are
759 len = strlen(obd->obd_name) + 6;
760 OBD_ALLOC(niduuid, len);
762 strcpy(niduuid, obd->obd_name);
763 ptr = niduuid + strlen(niduuid);
766 rc = class_manual_cleanup(obd);
770 /* Clean the nid uuids */
772 GOTO(out, rc = -ENOMEM);
774 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
775 sprintf(ptr, "_%x", i);
776 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
779 CERROR("del MDC UUID %s failed: rc = %d\n",
784 OBD_FREE(niduuid, len);
786 /* class_import_put will get rid of the additional connections */
787 cfs_mutex_unlock(&mgc_start_lock);
791 /* Since there's only one mgc per node, we have to change it's fs to get
792 access to the right disk. */
793 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
795 struct lustre_sb_info *lsi = s2lsi(sb);
799 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
801 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
802 rc = obd_set_info_async(NULL, mgc->obd_self_export,
803 sizeof(KEY_SET_FS), KEY_SET_FS,
804 sizeof(*sb), sb, NULL);
806 CERROR("can't set_fs %d\n", rc);
812 static int server_mgc_clear_fs(struct obd_device *mgc)
817 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
819 rc = obd_set_info_async(NULL, mgc->obd_self_export,
820 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
825 CFS_DEFINE_MUTEX(server_start_lock);
827 /* Stop MDS/OSS if nobody is using them */
828 static int server_stop_servers(int lsiflags)
830 struct obd_device *obd = NULL;
831 struct obd_type *type = NULL;
835 cfs_mutex_lock(&server_start_lock);
837 /* Either an MDT or an OST or neither */
838 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
839 if ((lsiflags & LDD_F_SV_TYPE_MDT) &&
840 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
841 /*FIXME pre-rename, should eventually be LUSTRE_MDT_NAME*/
842 type = class_search_type(LUSTRE_MDS_NAME);
844 /* if this was an OST, and there are no more OST's, clean up the OSS */
845 if ((lsiflags & LDD_F_SV_TYPE_OST) &&
846 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
847 type = class_search_type(LUSTRE_OST_NAME);
850 if (obd && (!type || !type->typ_refcnt)) {
853 /* obd_fail doesn't mean much on a server obd */
854 err = class_manual_cleanup(obd);
859 cfs_mutex_unlock(&server_start_lock);
864 int server_mti_print(char *title, struct mgs_target_info *mti)
866 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
867 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
868 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
869 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
870 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
871 mti->mti_config_ver, mti->mti_flags);
875 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
876 * @param [in] svname server name including type and index
877 * @param [out] fsname Buffer to copy filesystem name prefix into.
878 * Must have at least 'strlen(fsname) + 1' chars.
879 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
882 static int server_name2fsname(char *svname, char *fsname, char **endptr)
886 p = strstr(svname, "-OST");
888 p = strstr(svname, "-MDT");
893 strncpy(fsname, svname, p - svname);
894 fsname[p - svname] = '\0';
904 * Get service name (svname) from string
906 * if endptr isn't NULL it is set to end of fsname *
908 int server_name2svname(char *label, char *svname, char **endptr)
913 /* We use server_name2fsname() just for parsing */
914 rc = server_name2fsname(label, NULL, &dash);
921 strncpy(svname, dash + 1, MTI_NAME_MAXLEN);
925 EXPORT_SYMBOL(server_name2svname);
928 /* Get the index from the obd name.
931 if endptr isn't NULL it is set to end of name */
932 int server_name2index(char *svname, __u32 *idx, char **endptr)
938 /* We use server_name2fsname() just for parsing */
939 rc = server_name2fsname(svname, NULL, &dash);
948 if (strncmp(dash, "MDT", 3) == 0)
949 rc = LDD_F_SV_TYPE_MDT;
950 else if (strncmp(dash, "OST", 3) == 0)
951 rc = LDD_F_SV_TYPE_OST;
957 if (strcmp(dash, "all") == 0)
958 return rc | LDD_F_SV_ALL;
960 index = simple_strtoul(dash, endptr, 16);
965 EXPORT_SYMBOL(server_name2index);
967 /* Generate data for registration */
968 static int server_lsi2mti(struct lustre_sb_info *lsi,
969 struct mgs_target_info *mti)
971 lnet_process_id_t id;
978 strncpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname));
980 mti->mti_nid_count = 0;
981 while (LNetGetId(i++, &id) != -ENOENT) {
982 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
985 /* server use --servicenode param, only allow specified
986 * nids be registered */
987 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
988 class_match_nid(lsi->lsi_lmd->lmd_params,
989 PARAM_FAILNODE, id.nid) < 1)
992 /* match specified network */
993 if (!class_match_net(lsi->lsi_lmd->lmd_params,
994 PARAM_NETWORK, LNET_NIDNET(id.nid)))
997 mti->mti_nids[mti->mti_nid_count] = id.nid;
998 mti->mti_nid_count++;
999 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1000 CWARN("Only using first %d nids for %s\n",
1001 mti->mti_nid_count, mti->mti_svname);
1006 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1007 mti->mti_config_ver = 0;
1009 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1013 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1016 /* Orion requires index to be set */
1017 LASSERT(!(rc & LDD_F_NEED_INDEX));
1018 /* keep only LDD flags */
1019 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1020 mti->mti_flags |= LDD_F_UPDATE;
1021 strncpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1022 sizeof(mti->mti_params));
1026 /* Register an old or new target with the MGS. If needed MGS will construct
1027 startup logs and assign index */
1028 static int server_register_target(struct lustre_sb_info *lsi)
1030 struct obd_device *mgc = lsi->lsi_mgc;
1031 struct mgs_target_info *mti = NULL;
1038 if (!IS_SERVER(lsi))
1045 rc = server_lsi2mti(lsi, mti);
1049 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1050 mti->mti_svname, mti->mti_fsname,
1051 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1054 /* if write_conf is true, the registration must succeed */
1055 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1056 mti->mti_flags |= LDD_F_OPC_REG;
1058 /* Register the target */
1059 /* FIXME use mgc_process_config instead */
1060 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1061 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1062 sizeof(*mti), mti, NULL);
1064 if (mti->mti_flags & LDD_F_ERROR) {
1065 LCONSOLE_ERROR_MSG(0x160,
1066 "The MGS is refusing to allow this "
1067 "server (%s) to start. Please see messages"
1068 " on the MGS node.\n", lsi->lsi_svname);
1069 } else if (writeconf) {
1070 LCONSOLE_ERROR_MSG(0x15f,
1071 "Communication to the MGS return error %d. "
1072 "Is the MGS running?\n", rc);
1074 CERROR("Cannot talk to the MGS: %d, not fatal\n", rc);
1075 /* reset the error code for non-fatal error. */
1088 * Notify the MGS that this target is ready.
1089 * Used by IR - if the MGS receives this message, it will notify clients.
1091 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1093 struct lustre_sb_info *lsi = s2lsi(sb);
1094 struct obd_device *mgc = lsi->lsi_mgc;
1095 struct mgs_target_info *mti = NULL;
1101 if (!(IS_SERVER(lsi)))
1107 rc = server_lsi2mti(lsi, mti);
1111 mti->mti_instance = obd->u.obt.obt_instance;
1112 mti->mti_flags |= LDD_F_OPC_READY;
1114 /* FIXME use mgc_process_config instead */
1115 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1116 sizeof(KEY_REGISTER_TARGET),
1117 KEY_REGISTER_TARGET,
1118 sizeof(*mti), mti, NULL);
1120 /* Imperative recovery: if the mgs informs us to use IR? */
1121 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1122 (mti->mti_flags & LDD_F_IR_CAPABLE))
1123 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1132 /** Start server targets: MDTs and OSTs
1134 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1136 struct obd_device *obd;
1137 struct lustre_sb_info *lsi = s2lsi(sb);
1138 struct config_llog_instance cfg;
1142 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1145 /* If we're an MDT, make sure the global MDS is running */
1146 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_MDT) {
1147 /* make sure the MDS is started */
1148 cfs_mutex_lock(&server_start_lock);
1149 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1151 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1152 /* FIXME pre-rename, should eventually be LUSTRE_MDS_NAME */
1154 LUSTRE_MDS_OBDNAME"_uuid",
1157 cfs_mutex_unlock(&server_start_lock);
1158 CERROR("failed to start MDS: %d\n", rc);
1162 cfs_mutex_unlock(&server_start_lock);
1166 /* If we're an OST, make sure the global OSS is running */
1168 /* make sure OSS is started */
1169 cfs_mutex_lock(&server_start_lock);
1170 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1172 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1174 LUSTRE_OSS_OBDNAME"_uuid",
1177 cfs_mutex_unlock(&server_start_lock);
1178 CERROR("failed to start OSS: %d\n", rc);
1182 cfs_mutex_unlock(&server_start_lock);
1185 /* Set the mgc fs to our server disk. This allows the MGC to
1186 * read and write configs locally, in case it can't talk to the MGS. */
1187 if (lsi->lsi_srv_mnt) {
1188 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1193 /* Register with MGS */
1194 rc = server_register_target(lsi);
1198 /* Let the target look up the mount using the target's name
1199 (we can't pass the sb or mnt through class_process_config.) */
1200 rc = server_register_mount(lsi->lsi_svname, sb, mnt);
1204 /* Start targets using the llog named for the target */
1205 memset(&cfg, 0, sizeof(cfg));
1206 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1208 CERROR("failed to start server %s: %d\n",
1209 lsi->lsi_svname, rc);
1210 /* Do NOT call server_deregister_mount() here. This makes it
1211 * impossible to find mount later in cleanup time and leaves
1212 * @lsi and othder stuff leaked. -umka */
1217 /* Release the mgc fs for others to use */
1218 if (lsi->lsi_srv_mnt)
1219 server_mgc_clear_fs(lsi->lsi_mgc);
1222 obd = class_name2obd(lsi->lsi_svname);
1224 CERROR("no server named %s was started\n",
1229 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1230 (OBP(obd, iocontrol))) {
1231 obd_iocontrol(OBD_IOC_ABORT_RECOVERY,
1232 obd->obd_self_export, 0, NULL, NULL);
1235 server_notify_target(sb, obd);
1237 /* calculate recovery timeout, do it after lustre_process_log */
1238 server_calc_timeout(lsi, obd);
1240 /* log has been fully processed */
1241 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1247 /***************** lustre superblock **************/
1249 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1251 struct lustre_sb_info *lsi;
1257 OBD_ALLOC_PTR(lsi->lsi_lmd);
1258 if (!lsi->lsi_lmd) {
1263 lsi->lsi_lmd->lmd_exclude_count = 0;
1264 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1265 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1266 s2lsi_nocast(sb) = lsi;
1267 /* we take 1 extra ref for our setup */
1268 cfs_atomic_set(&lsi->lsi_mounts, 1);
1270 /* Default umount style */
1271 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1276 static int lustre_free_lsi(struct super_block *sb)
1278 struct lustre_sb_info *lsi = s2lsi(sb);
1281 LASSERT(lsi != NULL);
1282 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1284 /* someone didn't call server_put_mount. */
1285 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1287 if (lsi->lsi_lmd != NULL) {
1288 if (lsi->lsi_lmd->lmd_dev != NULL)
1289 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1290 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1291 if (lsi->lsi_lmd->lmd_profile != NULL)
1292 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1293 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1294 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1295 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1296 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1297 if (lsi->lsi_lmd->lmd_opts != NULL)
1298 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1299 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1300 if (lsi->lsi_lmd->lmd_exclude_count)
1301 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1302 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1303 lsi->lsi_lmd->lmd_exclude_count);
1304 if (lsi->lsi_lmd->lmd_mgs != NULL)
1305 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
1306 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
1307 if (lsi->lsi_lmd->lmd_osd_type != NULL)
1308 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
1309 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
1310 if (lsi->lsi_lmd->lmd_params != NULL)
1311 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
1313 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1316 LASSERT(lsi->lsi_llsbi == NULL);
1317 OBD_FREE(lsi, sizeof(*lsi));
1318 s2lsi_nocast(sb) = NULL;
1323 /* The lsi has one reference for every server that is using the disk -
1324 e.g. MDT, MGS, and potentially MGC */
1325 static int lustre_put_lsi(struct super_block *sb)
1327 struct lustre_sb_info *lsi = s2lsi(sb);
1330 LASSERT(lsi != NULL);
1332 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
1333 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
1334 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
1335 obd_disconnect(lsi->lsi_osd_exp);
1336 /* wait till OSD is gone */
1337 obd_zombie_barrier();
1339 lustre_free_lsi(sb);
1345 static int lsi_prepare(struct lustre_sb_info *lsi)
1352 LASSERT(lsi->lsi_lmd);
1354 /* The server name is given as a mount line option */
1355 if (lsi->lsi_lmd->lmd_profile == NULL) {
1356 LCONSOLE_ERROR("Can't determine server name\n");
1360 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname))
1361 RETURN(-ENAMETOOLONG);
1363 strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile);
1365 /* Determine osd type */
1366 if (lsi->lsi_lmd->lmd_osd_type != NULL) {
1367 if (strlen(lsi->lsi_lmd->lmd_osd_type) >=
1368 sizeof(lsi->lsi_osd_type))
1369 RETURN(-ENAMETOOLONG);
1371 strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type);
1373 strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME);
1376 /* XXX: a temp. solution for components using fsfilt
1377 * to be removed in one of the subsequent patches */
1378 if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) {
1379 strcpy(lsi->lsi_fstype, "ldiskfs");
1381 strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type);
1384 /* Determine server type */
1385 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1387 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
1388 /* Assume we're a bare MGS */
1390 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
1392 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
1397 lsi->lsi_flags |= rc;
1399 /* Add mount line flags that used to be in ldd:
1400 * writeconf, mgs, iam, anything else?
1402 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
1403 LDD_F_WRITECONF : 0;
1404 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
1406 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
1407 LDD_F_SV_TYPE_MGS : 0;
1408 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_IAM) ?
1410 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
1411 LDD_F_NO_PRIMNODE : 0;
1416 /*************** server mount ******************/
1418 /** Start the shutdown of servers at umount.
1420 static void server_put_super(struct super_block *sb)
1422 struct lustre_sb_info *lsi = s2lsi(sb);
1423 struct obd_device *obd;
1424 char *tmpname, *extraname = NULL;
1426 int lsiflags = lsi->lsi_flags;
1429 LASSERT(IS_SERVER(lsi));
1431 tmpname_sz = strlen(lsi->lsi_svname) + 1;
1432 OBD_ALLOC(tmpname, tmpname_sz);
1433 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
1434 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1435 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1436 snprintf(tmpname, tmpname_sz, "MGS");
1438 /* Stop the target */
1439 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1440 (IS_MDT(lsi) || IS_OST(lsi))) {
1441 struct lustre_profile *lprof = NULL;
1443 /* tell the mgc to drop the config log */
1444 lustre_end_log(sb, lsi->lsi_svname, NULL);
1446 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1447 If there are any setup/cleanup errors, save the lov
1448 name for safety cleanup later. */
1449 lprof = class_get_profile(lsi->lsi_svname);
1450 if (lprof && lprof->lp_dt) {
1451 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1452 strcpy(extraname, lprof->lp_dt);
1455 obd = class_name2obd(lsi->lsi_svname);
1457 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1458 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
1460 /* We can't seem to give an error return code
1461 * to .put_super, so we better make sure we clean up! */
1463 class_manual_cleanup(obd);
1465 CERROR("no obd %s\n", lsi->lsi_svname);
1466 server_deregister_mount(lsi->lsi_svname);
1470 /* If they wanted the mgs to stop separately from the mdt, they
1471 should have put it on a different device. */
1473 /* if MDS start with --nomgs, don't stop MGS then */
1474 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
1475 server_stop_mgs(sb);
1478 /* Clean the mgc and sb */
1479 lustre_common_put_super(sb);
1481 /* wait till all in-progress cleanups are done
1482 * specifically we're interested in ofd cleanup
1484 obd_zombie_barrier();
1486 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1487 until the target is really gone so that our type refcount check
1489 server_stop_servers(lsiflags);
1491 /* In case of startup or cleanup err, stop related obds */
1493 obd = class_name2obd(extraname);
1495 CWARN("Cleaning orphaned obd %s\n", extraname);
1497 class_manual_cleanup(obd);
1499 OBD_FREE(extraname, strlen(extraname) + 1);
1502 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1503 OBD_FREE(tmpname, tmpname_sz);
1507 /** Called only for 'umount -f'
1509 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1510 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
1512 struct super_block *sb = vfsmnt->mnt_sb;
1514 static void server_umount_begin(struct super_block *sb)
1517 struct lustre_sb_info *lsi = s2lsi(sb);
1520 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1521 if (!(flags & MNT_FORCE)) {
1527 CDEBUG(D_MOUNT, "umount -f\n");
1528 /* umount = failover
1530 no third way to do non-force, non-failover */
1531 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1535 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
1537 struct super_block *sb = dentry->d_sb;
1538 struct lustre_sb_info *lsi = s2lsi(sb);
1539 struct obd_statfs statfs;
1543 if (lsi->lsi_dt_dev) {
1544 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
1546 statfs_unpack(buf, &statfs);
1547 buf->f_type = sb->s_magic;
1553 buf->f_type = sb->s_magic;
1554 buf->f_bsize = sb->s_blocksize;
1560 buf->f_namelen = NAME_MAX;
1564 /** The operations we support directly on the superblock:
1565 * mount, umount, and df.
1567 static struct super_operations server_ops =
1569 .put_super = server_put_super,
1570 .umount_begin = server_umount_begin, /* umount -f */
1571 .statfs = server_statfs,
1574 #define log2(n) cfs_ffz(~(n))
1575 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1577 static int server_fill_super_common(struct super_block *sb)
1579 struct inode *root = 0;
1582 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1584 sb->s_blocksize = 4096;
1585 sb->s_blocksize_bits = log2(sb->s_blocksize);
1586 sb->s_magic = LUSTRE_SUPER_MAGIC;
1587 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
1588 sb->s_flags |= MS_RDONLY;
1589 sb->s_op = &server_ops;
1591 root = new_inode(sb);
1593 CERROR("Can't make root inode\n");
1597 /* returns -EIO for every operation */
1598 /* make_bad_inode(root); -- badness - can't umount */
1599 /* apparently we need to be a directory for the mount to finish */
1600 root->i_mode = S_IFDIR;
1602 sb->s_root = d_alloc_root(root);
1604 CERROR("Can't make root dentry\n");
1612 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
1614 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1615 struct obd_device *obd;
1616 struct dt_device_param p;
1622 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
1623 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
1625 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
1626 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
1627 strcat(lsi->lsi_osd_uuid, "_UUID");
1628 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
1630 obd = class_name2obd(lsi->lsi_osd_obdname);
1632 rc = lustre_start_simple(lsi->lsi_osd_obdname,
1634 lsi->lsi_osd_uuid, lmd->lmd_dev,
1635 flagstr, lsi->lsi_lmd->lmd_opts,
1639 obd = class_name2obd(lsi->lsi_osd_obdname);
1643 rc = obd_connect(NULL, &lsi->lsi_osd_exp, obd, &obd->obd_uuid, NULL, NULL);
1646 class_manual_cleanup(obd);
1647 lsi->lsi_dt_dev = NULL;
1650 /* XXX: to keep support old components relying on lsi_srv_mnt
1651 * we get this info from OSD just started */
1652 LASSERT(obd->obd_lu_dev);
1653 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
1654 LASSERT(lsi->lsi_dt_dev);
1656 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
1658 lsi->lsi_srv_mnt = p.ddp_mnt;
1664 /** Fill in the superblock info for a Lustre server.
1665 * Mount the device with the correct options.
1666 * Read the on-disk config file.
1667 * Start the services.
1669 static int server_fill_super(struct super_block *sb)
1671 struct lustre_sb_info *lsi = s2lsi(sb);
1675 rc = lsi_prepare(lsi);
1679 /* Start low level OSD */
1680 rc = osd_start(lsi, sb->s_flags);
1682 CERROR("Unable to start osd on %s: %d\n",
1683 lsi->lsi_lmd->lmd_dev, rc);
1688 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
1689 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
1691 if (class_name2obd(lsi->lsi_svname)) {
1692 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1693 "running. Double-mount may have compromised"
1694 " the disk journal.\n",
1700 /* Start MGS before MGC */
1701 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
1702 rc = server_start_mgs(sb);
1707 /* Start MGC before servers */
1708 rc = lustre_start_mgc(sb);
1712 /* Set up all obd devices for service */
1713 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1714 (IS_OST(lsi) || IS_MDT(lsi))) {
1715 rc = server_start_targets(sb, lsi->lsi_srv_mnt);
1717 CERROR("Unable to start targets: %d\n", rc);
1720 /* FIXME overmount client here,
1721 or can we just start a client log and client_fill_super on this sb?
1722 We need to make sure server_put_super gets called too - ll_put_super
1723 calls lustre_common_put_super; check there for LSI_SERVER flag,
1725 Probably should start client from new thread so we can return.
1726 Client will not finish until all servers are connected.
1727 Note - MGS-only server does NOT get a client, since there is no
1728 lustre fs associated - the MGS is for all lustre fs's */
1731 rc = server_fill_super_common(sb);
1737 /* We jump here in case of failure while starting targets or MGS.
1738 * In this case we can't just put @mnt and have to do real cleanup
1739 * with stoping targets, etc. */
1740 server_put_super(sb);
1745 * Calculate timeout value for a target.
1747 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
1749 struct lustre_mount_data *lmd;
1753 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
1754 int min = OBD_RECOVERY_TIME_MIN;
1756 LASSERT(IS_SERVER(lsi));
1760 soft = lmd->lmd_recovery_time_soft;
1761 hard = lmd->lmd_recovery_time_hard;
1762 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
1763 obd->obd_no_ir = !has_ir;
1767 soft = OBD_RECOVERY_TIME_SOFT;
1769 hard = OBD_RECOVERY_TIME_HARD;
1771 /* target may have ir_factor configured. */
1772 factor = OBD_IR_FACTOR_DEFAULT;
1773 if (obd->obd_recovery_ir_factor)
1774 factor = obd->obd_recovery_ir_factor;
1777 int new_soft = soft;
1778 int new_hard = hard;
1780 /* adjust timeout value by imperative recovery */
1782 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
1783 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
1785 /* make sure the timeout is not too short */
1786 new_soft = max(min, new_soft);
1787 new_hard = max(new_soft, new_hard);
1789 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
1790 "window shrunk from %d-%d down to %d-%d\n",
1791 obd->obd_name, soft, hard, new_soft, new_hard);
1798 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
1799 obd->obd_recovery_time_hard = hard;
1800 obd->obd_recovery_ir_factor = factor;
1802 EXPORT_SYMBOL(server_calc_timeout);
1804 /*************** mount common betweeen server and client ***************/
1807 int lustre_common_put_super(struct super_block *sb)
1812 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
1814 /* Drop a ref to the MGC */
1815 rc = lustre_stop_mgc(sb);
1816 if (rc && (rc != -ENOENT)) {
1818 CERROR("Can't stop MGC: %d\n", rc);
1821 /* BUSY just means that there's some other obd that
1822 needs the mgc. Let him clean it up. */
1823 CDEBUG(D_MOUNT, "MGC still in use\n");
1825 /* Drop a ref to the mounted disk */
1830 EXPORT_SYMBOL(lustre_common_put_super);
1832 static void lmd_print(struct lustre_mount_data *lmd)
1836 PRINT_CMD(PRINT_MASK, " mount data:\n");
1837 if (lmd_is_client(lmd))
1838 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
1839 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
1840 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
1843 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
1845 if (lmd->lmd_recovery_time_soft)
1846 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
1847 lmd->lmd_recovery_time_soft);
1849 if (lmd->lmd_recovery_time_hard)
1850 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
1851 lmd->lmd_recovery_time_hard);
1853 for (i = 0; i < lmd->lmd_exclude_count; i++) {
1854 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
1855 lmd->lmd_exclude[i]);
1859 /* Is this server on the exclusion list */
1860 int lustre_check_exclusion(struct super_block *sb, char *svname)
1862 struct lustre_sb_info *lsi = s2lsi(sb);
1863 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1868 rc = server_name2index(svname, &index, NULL);
1869 if (rc != LDD_F_SV_TYPE_OST)
1870 /* Only exclude OSTs */
1873 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
1874 index, lmd->lmd_exclude_count, lmd->lmd_dev);
1876 for(i = 0; i < lmd->lmd_exclude_count; i++) {
1877 if (index == lmd->lmd_exclude[i]) {
1878 CWARN("Excluding %s (on exclusion list)\n", svname);
1885 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
1886 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
1888 char *s1 = ptr, *s2;
1889 __u32 index, *exclude_list;
1893 /* The shortest an ost name can be is 8 chars: -OST0000.
1894 We don't actually know the fsname at this time, so in fact
1895 a user could specify any fsname. */
1896 devmax = strlen(ptr) / 8 + 1;
1898 /* temp storage until we figure out how many we have */
1899 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
1903 /* we enter this fn pointing at the '=' */
1904 while (*s1 && *s1 != ' ' && *s1 != ',') {
1906 rc = server_name2index(s1, &index, &s2);
1908 CERROR("Can't parse server name '%s'\n", s1);
1911 if (rc == LDD_F_SV_TYPE_OST)
1912 exclude_list[lmd->lmd_exclude_count++] = index;
1914 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
1916 /* now we are pointing at ':' (next exclude)
1917 or ',' (end of excludes) */
1918 if (lmd->lmd_exclude_count >= devmax)
1921 if (rc >= 0) /* non-err */
1924 if (lmd->lmd_exclude_count) {
1925 /* permanent, freed in lustre_free_lsi */
1926 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
1927 lmd->lmd_exclude_count);
1928 if (lmd->lmd_exclude) {
1929 memcpy(lmd->lmd_exclude, exclude_list,
1930 sizeof(index) * lmd->lmd_exclude_count);
1933 lmd->lmd_exclude_count = 0;
1936 OBD_FREE(exclude_list, sizeof(index) * devmax);
1940 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
1945 if (lmd->lmd_mgssec != NULL) {
1946 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
1947 lmd->lmd_mgssec = NULL;
1950 tail = strchr(ptr, ',');
1952 length = strlen(ptr);
1954 length = tail - ptr;
1956 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
1957 if (lmd->lmd_mgssec == NULL)
1960 memcpy(lmd->lmd_mgssec, ptr, length);
1961 lmd->lmd_mgssec[length] = '\0';
1965 static int lmd_parse_string(char **handle, char *ptr)
1970 if ((handle == NULL) || (ptr == NULL))
1973 if (*handle != NULL) {
1974 OBD_FREE(*handle, strlen(*handle) + 1);
1978 tail = strchr(ptr, ',');
1980 length = strlen(ptr);
1982 length = tail - ptr;
1984 OBD_ALLOC(*handle, length + 1);
1985 if (*handle == NULL)
1988 memcpy(*handle, ptr, length);
1989 (*handle)[length] = '\0';
1994 /* Collect multiple values for mgsnid specifiers */
1995 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
2003 /* Find end of nidlist */
2004 while (class_parse_nid(tail, &nid, &tail) == 0) {}
2005 length = tail - *ptr;
2007 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
2011 if (lmd->lmd_mgs != NULL)
2012 oldlen = strlen(lmd->lmd_mgs) + 1;
2014 OBD_ALLOC(mgsnid, oldlen + length + 1);
2018 if (lmd->lmd_mgs != NULL) {
2019 /* Multiple mgsnid= are taken to mean failover locations */
2020 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
2021 mgsnid[oldlen - 1] = ':';
2022 OBD_FREE(lmd->lmd_mgs, oldlen);
2024 memcpy(mgsnid + oldlen, *ptr, length);
2025 mgsnid[oldlen + length] = '\0';
2026 lmd->lmd_mgs = mgsnid;
2032 /** Parse mount line options
2033 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
2034 * dev is passed as device=uml1:/lustre by mount.lustre
2036 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
2038 char *s1, *s2, *devname = NULL;
2039 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
2045 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
2046 "/sbin/mount.lustre is installed.\n");
2050 /* Options should be a string - try to detect old lmd data */
2051 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
2052 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
2053 "/sbin/mount.lustre. Please install "
2054 "version %s\n", LUSTRE_VERSION_STRING);
2057 lmd->lmd_magic = LMD_MAGIC;
2059 OBD_ALLOC(lmd->lmd_params, 4096);
2060 if (lmd->lmd_params == NULL)
2062 lmd->lmd_params[0] = '\0';
2064 /* Set default flags here */
2069 int time_min = OBD_RECOVERY_TIME_MIN;
2071 /* Skip whitespace and extra commas */
2072 while (*s1 == ' ' || *s1 == ',')
2075 /* Client options are parsed in ll_options: eg. flock,
2078 /* Parse non-ldiskfs options here. Rather than modifying
2079 ldiskfs, we just zero these out here */
2080 if (strncmp(s1, "abort_recov", 11) == 0) {
2081 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
2083 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
2084 lmd->lmd_recovery_time_soft = max_t(int,
2085 simple_strtoul(s1 + 19, NULL, 10), time_min);
2087 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
2088 lmd->lmd_recovery_time_hard = max_t(int,
2089 simple_strtoul(s1 + 19, NULL, 10), time_min);
2091 } else if (strncmp(s1, "noir", 4) == 0) {
2092 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
2094 } else if (strncmp(s1, "nosvc", 5) == 0) {
2095 lmd->lmd_flags |= LMD_FLG_NOSVC;
2097 } else if (strncmp(s1, "nomgs", 5) == 0) {
2098 lmd->lmd_flags |= LMD_FLG_NOMGS;
2100 } else if (strncmp(s1, "noscrub", 7) == 0) {
2101 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
2103 } else if (strncmp(s1, PARAM_MGSNODE,
2104 sizeof(PARAM_MGSNODE) - 1) == 0) {
2105 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
2106 /* Assume the next mount opt is the first
2107 invalid nid we get to. */
2108 rc = lmd_parse_mgs(lmd, &s2);
2112 } else if (strncmp(s1, "writeconf", 9) == 0) {
2113 lmd->lmd_flags |= LMD_FLG_WRITECONF;
2115 } else if (strncmp(s1, "virgin", 6) == 0) {
2116 lmd->lmd_flags |= LMD_FLG_VIRGIN;
2118 } else if (strncmp(s1, "noprimnode", 10) == 0) {
2119 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
2121 } else if (strncmp(s1, "mgssec=", 7) == 0) {
2122 rc = lmd_parse_mgssec(lmd, s1 + 7);
2126 /* ost exclusion list */
2127 } else if (strncmp(s1, "exclude=", 8) == 0) {
2128 rc = lmd_make_exclusion(lmd, s1 + 7);
2132 } else if (strncmp(s1, "mgs", 3) == 0) {
2134 lmd->lmd_flags |= LMD_FLG_MGS;
2136 } else if (strncmp(s1, "svname=", 7) == 0) {
2137 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
2141 } else if (strncmp(s1, "param=", 6) == 0) {
2143 char *tail = strchr(s1 + 6, ',');
2145 length = strlen(s1);
2149 strncat(lmd->lmd_params, s1 + 6, length);
2150 strcat(lmd->lmd_params, " ");
2152 } else if (strncmp(s1, "osd=", 4) == 0) {
2153 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
2158 /* Linux 2.4 doesn't pass the device, so we stuck it at the
2159 end of the options. */
2160 else if (strncmp(s1, "device=", 7) == 0) {
2162 /* terminate options right before device. device
2163 must be the last one. */
2169 s2 = strchr(s1, ',');
2177 memmove(s1, s2, strlen(s2) + 1);
2183 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2184 "(need mount option 'device=...')\n");
2188 s1 = strstr(devname, ":/");
2191 lmd->lmd_flags |= LMD_FLG_CLIENT;
2192 /* Remove leading /s from fsname */
2193 while (*++s1 == '/') ;
2194 /* Freed in lustre_free_lsi */
2195 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2196 if (!lmd->lmd_profile)
2198 sprintf(lmd->lmd_profile, "%s-client", s1);
2201 /* Freed in lustre_free_lsi */
2202 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2205 strcpy(lmd->lmd_dev, devname);
2207 /* Save mount options */
2208 s1 = options + strlen(options) - 1;
2209 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2211 if (*options != 0) {
2212 /* Freed in lustre_free_lsi */
2213 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2216 strcpy(lmd->lmd_opts, options);
2220 lmd->lmd_magic = LMD_MAGIC;
2225 CERROR("Bad mount options %s\n", options);
2229 struct lustre_mount_data2 {
2231 struct vfsmount *lmd2_mnt;
2234 /** This is the entry point for the mount call into Lustre.
2235 * This is called when a server or client is mounted,
2236 * and this is where we start setting things up.
2237 * @param data Mount options (e.g. -o flock,abort_recov)
2239 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2241 struct lustre_mount_data *lmd;
2242 struct lustre_mount_data2 *lmd2 = data;
2243 struct lustre_sb_info *lsi;
2247 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2249 lsi = lustre_init_lsi(sb);
2255 * Disable lockdep during mount, because mount locking patterns are
2261 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
2263 obd_zombie_barrier();
2265 /* Figure out the lmd from the mount options */
2266 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
2268 GOTO(out, rc = -EINVAL);
2271 if (lmd_is_client(lmd)) {
2272 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2273 if (!client_fill_super) {
2274 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2275 "client mount! Is the 'lustre' "
2276 "module loaded?\n");
2280 rc = lustre_start_mgc(sb);
2285 /* Connect and start */
2286 /* (should always be ll_fill_super) */
2287 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
2288 /* c_f_s will call lustre_common_put_super on failure */
2291 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2292 rc = server_fill_super(sb);
2293 /* s_f_s calls lustre_start_mgc after the mount because we need
2294 the MGS nids which are stored on disk. Plus, we may
2295 need to start the MGS first. */
2296 /* s_f_s will call server_put_super on failure */
2299 /* If error happens in fill_super() call, @lsi will be killed there.
2300 * This is why we do not put it here. */
2304 CERROR("Unable to mount %s (%d)\n",
2305 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2307 CDEBUG(D_SUPER, "Mount %s complete\n",
2315 /* We can't call ll_fill_super by name because it lives in a module that
2316 must be loaded after this one. */
2317 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
2318 struct vfsmount *mnt))
2320 client_fill_super = cfs;
2322 EXPORT_SYMBOL(lustre_register_client_fill_super);
2324 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
2326 kill_super_cb = cfs;
2328 EXPORT_SYMBOL(lustre_register_kill_super_cb);
2330 /***************** FS registration ******************/
2331 #ifdef HAVE_FSTYPE_MOUNT
2332 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
2333 const char *devname, void *data)
2335 struct lustre_mount_data2 lmd2 = { data, NULL };
2337 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
2340 int lustre_get_sb(struct file_system_type *fs_type, int flags,
2341 const char *devname, void * data, struct vfsmount *mnt)
2343 struct lustre_mount_data2 lmd2 = { data, mnt };
2345 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
2349 void lustre_kill_super(struct super_block *sb)
2351 struct lustre_sb_info *lsi = s2lsi(sb);
2353 if (kill_super_cb && lsi && !IS_SERVER(lsi))
2354 (*kill_super_cb)(sb);
2356 kill_anon_super(sb);
2359 /** Register the "lustre" fs type
2361 struct file_system_type lustre_fs_type = {
2362 .owner = THIS_MODULE,
2364 #ifdef HAVE_FSTYPE_MOUNT
2365 .mount = lustre_mount,
2367 .get_sb = lustre_get_sb,
2369 .kill_sb = lustre_kill_super,
2370 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
2371 #ifdef FS_HAS_FIEMAP
2374 LL_RENAME_DOES_D_MOVE,
2377 int lustre_register_fs(void)
2379 return register_filesystem(&lustre_fs_type);
2382 int lustre_unregister_fs(void)
2384 return unregister_filesystem(&lustre_fs_type);
2387 EXPORT_SYMBOL(server_mti_print);