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, Intel Corporation.
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 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 mutex_lock(&lustre_mount_info_lock);
110 if (server_find_mount(name)) {
111 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 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 mutex_lock(&lustre_mount_info_lock);
136 lmi = server_find_mount(name);
138 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 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 mutex_lock(&lustre_mount_info_lock);
163 lmi = server_find_mount(name);
164 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 mutex_lock(&lustre_mount_info_lock);
191 lmi = server_find_mount(name);
192 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 mutex_lock(&lustre_mount_info_lock);
210 lmi = server_find_mount(name);
211 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;
393 /* It is impossible to have more than 1 MGS per node, since
394 MGC wouldn't know which to connect to */
395 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
397 lsi = s2lsi(lmi->lmi_sb);
398 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
403 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
405 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
408 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
409 LUSTRE_MGS_OBDNAME, 0, 0,
410 lsi->lsi_osd_obdname, 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 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 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_quiet(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 |
685 OBD_CONNECT_LVB_TYPE;
687 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
688 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
690 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
693 if (lmd_is_client(lsi->lsi_lmd) &&
694 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
695 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
696 data->ocd_version = LUSTRE_VERSION_CODE;
697 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
699 CERROR("connect failed %d\n", rc);
703 obd->u.cli.cl_mgc_mgsexp = exp;
706 /* Keep the mgc info in the sb. Note that many lsi's can point
710 mutex_unlock(&mgc_start_lock);
715 OBD_FREE(mgcname, len);
717 OBD_FREE(niduuid, len + 2);
721 static int lustre_stop_mgc(struct super_block *sb)
723 struct lustre_sb_info *lsi = s2lsi(sb);
724 struct obd_device *obd;
725 char *niduuid = 0, *ptr = 0;
726 int i, rc = 0, len = 0;
736 mutex_lock(&mgc_start_lock);
737 LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
738 if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
739 /* This is not fatal, every client that stops
740 will call in here. */
741 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
742 cfs_atomic_read(&obd->u.cli.cl_mgc_refcount));
743 GOTO(out, rc = -EBUSY);
746 /* The MGC has no recoverable data in any case.
747 * force shotdown set in umount_begin */
748 obd->obd_no_recov = 1;
750 if (obd->u.cli.cl_mgc_mgsexp) {
751 /* An error is not fatal, if we are unable to send the
752 disconnect mgs ping evictor cleans up the export */
753 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
755 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
758 /* Save the obdname for cleaning the nid uuids, which are
760 len = strlen(obd->obd_name) + 6;
761 OBD_ALLOC(niduuid, len);
763 strcpy(niduuid, obd->obd_name);
764 ptr = niduuid + strlen(niduuid);
767 rc = class_manual_cleanup(obd);
771 /* Clean the nid uuids */
773 GOTO(out, rc = -ENOMEM);
775 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
776 sprintf(ptr, "_%x", i);
777 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
780 CERROR("del MDC UUID %s failed: rc = %d\n",
785 OBD_FREE(niduuid, len);
787 /* class_import_put will get rid of the additional connections */
788 mutex_unlock(&mgc_start_lock);
792 /* Since there's only one mgc per node, we have to change it's fs to get
793 access to the right disk. */
794 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
796 struct lustre_sb_info *lsi = s2lsi(sb);
800 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
802 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
803 rc = obd_set_info_async(NULL, mgc->obd_self_export,
804 sizeof(KEY_SET_FS), KEY_SET_FS,
805 sizeof(*sb), sb, NULL);
807 CERROR("can't set_fs %d\n", rc);
813 static int server_mgc_clear_fs(struct obd_device *mgc)
818 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
820 rc = obd_set_info_async(NULL, mgc->obd_self_export,
821 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
826 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
827 * @param [in] svname server name including type and index
828 * @param [out] fsname Buffer to copy filesystem name prefix into.
829 * Must have at least 'strlen(fsname) + 1' chars.
830 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
833 int server_name2fsname(char *svname, char *fsname, char **endptr)
835 char *dash = strrchr(svname, '-');
837 dash = strrchr(svname, ':');
842 /* interpret <fsname>-MDTXXXXX-mdc as mdt, the better way is to pass
843 * in the fsname, then determine the server index */
844 if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) {
846 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
852 if (fsname != NULL) {
853 strncpy(fsname, svname, dash - svname);
854 fsname[dash - svname] = '\0';
862 EXPORT_SYMBOL(server_name2fsname);
864 static int is_mdc_device(char *devname)
867 ptr = strrchr(devname, '-');
868 if (ptr != NULL && strcmp(ptr, "-mdc") == 0)
873 static int inline tgt_is_mdt0(char *tgtname)
878 type = server_name2index(tgtname, &idx, NULL);
879 if (type != LDD_F_SV_TYPE_MDT)
882 return (idx == 0) ? 1 :0;
885 static int inline is_mdc_for_mdt0(char *devname)
889 if (!is_mdc_device(devname))
892 ptr = strrchr(devname, '-');
897 if (tgt_is_mdt0(devname)) {
906 * Convert OST/MDT name(fsname-OSTxxxx) to an osp name
907 * (fsname-MDT0000-osp-OSTxxxx), which will be used to
908 * communicate with MDT0 for this target.
910 int tgt_name2ospname(char *svname, char *ospname)
917 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
921 rc = server_name2fsname(svname, fsname, &tgt);
923 CERROR("%s change fsname error: rc %d\n", svname, rc);
927 if (*tgt != '-' && *tgt != ':') {
928 CERROR("%s wrong svname name!\n", svname);
929 GOTO(cleanup, rc = -EINVAL);
933 if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
934 CERROR("%s is not an OST or MDT target!\n", svname);
935 GOTO(cleanup, rc = -EINVAL);
937 sprintf(ospname, "%s-MDT0000-%s-%s", fsname, LUSTRE_OSP_NAME, tgt);
940 OBD_FREE(fsname, MTI_NAME_MAXLEN);
943 EXPORT_SYMBOL(tgt_name2ospname);
945 static CFS_LIST_HEAD(osp_register_list);
946 DEFINE_MUTEX(osp_register_list_lock);
948 int lustre_register_osp_item(char *ospname, struct obd_export **exp,
949 register_osp_cb cb_func, void *cb_data)
951 struct obd_device *osp;
952 struct osp_register_item *ori;
955 LASSERTF(strlen(ospname) < MTI_NAME_MAXLEN, "ospname is too long %s\n",
957 LASSERT(exp != NULL && *exp == NULL);
963 mutex_lock(&osp_register_list_lock);
965 osp = class_name2obd(ospname);
966 if (osp != NULL && osp->obd_set_up == 1) {
967 struct obd_uuid *uuid;
971 mutex_unlock(&osp_register_list_lock);
975 memcpy(uuid->uuid, ospname, strlen(ospname));
976 *exp = cfs_hash_lookup(osp->obd_uuid_hash, uuid);
980 memcpy(ori->ori_name, ospname, strlen(ospname));
982 ori->ori_cb_func = cb_func;
983 ori->ori_cb_data = cb_data;
984 CFS_INIT_LIST_HEAD(&ori->ori_list);
985 cfs_list_add(&ori->ori_list, &osp_register_list);
987 if (*exp != NULL && cb_func != NULL)
990 mutex_unlock(&osp_register_list_lock);
993 EXPORT_SYMBOL(lustre_register_osp_item);
995 void lustre_deregister_osp_item(struct obd_export **exp)
997 struct osp_register_item *ori, *tmp;
999 mutex_lock(&osp_register_list_lock);
1000 cfs_list_for_each_entry_safe(ori, tmp, &osp_register_list, ori_list) {
1001 if (exp == ori->ori_exp) {
1003 class_export_put(*exp);
1004 cfs_list_del(&ori->ori_list);
1009 mutex_unlock(&osp_register_list_lock);
1011 EXPORT_SYMBOL(lustre_deregister_osp_item);
1013 static void lustre_notify_osp_list(struct obd_export *exp)
1015 struct osp_register_item *ori, *tmp;
1016 LASSERT(exp != NULL);
1018 mutex_lock(&osp_register_list_lock);
1019 cfs_list_for_each_entry_safe(ori, tmp, &osp_register_list, ori_list) {
1020 if (strcmp(exp->exp_obd->obd_name, ori->ori_name))
1022 if (*ori->ori_exp != NULL)
1024 *ori->ori_exp = class_export_get(exp);
1025 if (ori->ori_cb_func != NULL)
1026 ori->ori_cb_func(ori->ori_cb_data);
1028 mutex_unlock(&osp_register_list_lock);
1031 static int lustre_osp_connect(struct obd_device *osp)
1034 struct lu_context session_ctx;
1035 struct obd_export *exp;
1036 struct obd_uuid *uuid = NULL;
1037 struct obd_connect_data *data = NULL;
1041 /* log has been fully processed, let clients connect */
1042 rc = lu_env_init(&env, osp->obd_lu_dev->ld_type->ldt_ctx_tags);
1046 lu_context_init(&session_ctx, LCT_SESSION);
1047 session_ctx.lc_thread = NULL;
1048 lu_context_enter(&session_ctx);
1049 env.le_ses = &session_ctx;
1051 OBD_ALLOC_PTR(data);
1053 GOTO(out, rc = -ENOMEM);
1055 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
1056 data->ocd_version = LUSTRE_VERSION_CODE;
1057 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
1058 OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE |
1059 OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE |
1060 OBD_CONNECT_LIGHTWEIGHT;
1061 OBD_ALLOC_PTR(uuid);
1063 GOTO(out, rc = -ENOMEM);
1065 if (strlen(osp->obd_name) > sizeof(uuid->uuid)) {
1066 CERROR("%s: Too long osp name %s, max_size is %d\n",
1067 osp->obd_name, osp->obd_name, (int)sizeof(uuid->uuid));
1068 GOTO(out, rc = -EINVAL);
1070 /* Use osp name as the uuid, so we find the export by
1072 memcpy(uuid->uuid, osp->obd_name, strlen(osp->obd_name));
1073 rc = obd_connect(&env, &exp, osp, uuid, data, NULL);
1075 CERROR("%s: connect failed: rc = %d\n", osp->obd_name, rc);
1077 lustre_notify_osp_list(exp);
1086 lu_context_exit(&session_ctx);
1087 lu_context_fini(&session_ctx);
1093 * osp-on-ost is used by slaves (Non-MDT0 targets) to manage the connection
1096 * The OSTs will communicate with MDT0 by the connection established by the
1097 * osp-on-ost to get quota and fid sequence.
1100 static int lustre_osp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi)
1102 struct obd_connect_data *data = NULL;
1103 struct obd_device *obd;
1104 char *ospname = NULL;
1105 char *ospuuid = NULL;
1109 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1112 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
1116 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1117 if (ospname == NULL)
1118 GOTO(out, rc = -ENOMEM);
1120 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1122 CERROR("%s change ospname error: rc %d\n",
1123 lsi->lsi_svname, rc);
1127 OBD_ALLOC(ospuuid, MTI_NAME_MAXLEN);
1128 if (ospuuid == NULL)
1129 GOTO(out, rc = -ENOMEM);
1131 sprintf(ospuuid, "%s_UUID", ospname);
1132 rc = lustre_start_simple(ospname, LUSTRE_OSP_NAME,
1133 ospuuid, lustre_cfg_string(lcfg, 1),
1136 CERROR("%s: setup up failed: rc %d\n", ospname, rc);
1140 obd = class_name2obd(ospname);
1141 LASSERT(obd != NULL);
1143 rc = lustre_osp_connect(obd);
1145 CERROR("%s: connect failed: rc = %d\n", ospname, rc);
1149 if (ospname != NULL)
1150 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1151 if (ospuuid != NULL)
1152 OBD_FREE(ospuuid, MTI_NAME_MAXLEN);
1157 static int lustre_osp_add_conn(struct lustre_cfg *cfg,
1158 struct lustre_sb_info *lsi)
1160 struct lustre_cfg_bufs *bufs = NULL;
1161 struct lustre_cfg *lcfg = NULL;
1162 char *ospname = NULL;
1163 struct obd_device *osp;
1167 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1168 if (ospname == NULL)
1169 GOTO(out, rc = -ENOMEM);
1171 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1173 CERROR("%s change ospname error: rc %d\n",
1174 lsi->lsi_svname, rc);
1178 OBD_ALLOC_PTR(bufs);
1180 GOTO(out, rc = -ENOMEM);
1182 lustre_cfg_bufs_reset(bufs, ospname);
1183 lustre_cfg_bufs_set_string(bufs, 1,
1184 lustre_cfg_string(cfg, 1));
1186 lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
1188 osp = class_name2obd(ospname);
1190 CERROR("Can not find %s\n", ospname);
1191 GOTO(out, rc = -EINVAL);
1194 rc = class_add_conn(osp, lcfg);
1196 CERROR("%s: can't add conn: rc = %d\n", ospname, rc);
1202 lustre_cfg_free(lcfg);
1203 if (ospname != NULL)
1204 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1210 * Retrieve MDT nids from the client log, then start the osp-on-ost device.
1211 * there are only two scenarios which would include mdt nid.
1213 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx-
1214 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
1215 * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID
1216 * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp
1217 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
1218 * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp
1219 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx
1220 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx-
1222 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1223 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
1224 * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp
1225 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1227 static int client_osp_config_process(const struct lu_env *env,
1228 struct llog_handle *handle,
1229 struct llog_rec_hdr *rec, void *data)
1231 struct config_llog_instance *clli = data;
1232 int cfg_len = rec->lrh_len;
1233 char *cfg_buf = (char *) (rec + 1);
1234 struct lustre_cfg *lcfg = NULL;
1235 struct lustre_sb_info *lsi;
1236 int rc = 0, swab = 0;
1239 if (rec->lrh_type != OBD_CFG_REC) {
1240 CERROR("Unknown llog record type %#x encountered\n",
1245 LASSERT(clli->cfg_sb != NULL);
1246 lsi = s2lsi(clli->cfg_sb);
1248 lcfg = (struct lustre_cfg *)cfg_buf;
1249 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1250 lustre_swab_lustre_cfg(lcfg);
1254 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1258 switch (lcfg->lcfg_command) {
1260 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1262 lustre_swab_cfg_marker(marker, swab,
1263 LUSTRE_CFG_BUFLEN(lcfg, 1));
1264 if (marker->cm_flags & CM_SKIP ||
1265 marker->cm_flags & CM_EXCLUDE)
1268 if (!tgt_is_mdt0(marker->cm_tgtname))
1271 if(!strncmp(marker->cm_comment, "add mdc", 7) ||
1272 !strncmp(marker->cm_comment, "add failnid", 11)) {
1273 if (marker->cm_flags & CM_START) {
1274 clli->cfg_flags = CFG_F_MARKER;
1275 /* This hack is to differentiate the
1276 * ADD_UUID is come from "add mdc" record
1277 * or from "add failnid" record. */
1278 if (!strncmp(marker->cm_comment,
1280 clli->cfg_flags |= CFG_F_SKIP;
1281 } else if (marker->cm_flags & CM_END) {
1282 clli->cfg_flags = 0;
1287 case LCFG_ADD_UUID: {
1288 if (clli->cfg_flags == CFG_F_MARKER) {
1289 rc = lustre_osp_setup(lcfg, lsi);
1290 /* XXX: process only the first nid as
1291 * we don't need another instance of osp */
1292 clli->cfg_flags |= CFG_F_SKIP;
1293 } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
1294 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1297 CERROR("%s: Fail to add uuid, rc:%d\n",
1298 lsi->lsi_svname, rc);
1302 case LCFG_ADD_CONN: {
1303 if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0)))
1304 rc = lustre_osp_add_conn(lcfg, lsi);
1314 static int lustre_disconnect_osp(struct super_block *sb)
1316 struct lustre_sb_info *lsi = s2lsi(sb);
1317 struct obd_device *osp;
1318 char *ospname = NULL;
1319 char *logname = NULL;
1320 struct lustre_cfg *lcfg = NULL;
1321 struct lustre_cfg_bufs *bufs = NULL;
1322 struct config_llog_instance *cfg = NULL;
1326 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1330 /* Only disconnect MDT0-osp-MDT0 here, other osp on MDT
1331 * will be disconnect during MDT stack cleanup.
1332 * FIXME: remove later when quota on DNE is finished */
1333 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1339 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1340 if (logname == NULL)
1343 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1344 if (ospname == NULL)
1345 GOTO(out, rc = -ENOMEM);
1347 rc = server_name2fsname(lsi->lsi_svname, ospname, NULL);
1349 CERROR("%s: get fsname error: %d\n",
1350 lsi->lsi_svname, rc);
1353 sprintf(logname, "%s-client", ospname);
1357 GOTO(out, rc = -ENOMEM);
1360 cfg->cfg_instance = sb;
1361 rc = lustre_end_log(sb, logname, cfg);
1363 CERROR("Can't end config log %s\n", ospname);
1367 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1369 CERROR("%s: get osp name error: %d\n",
1370 lsi->lsi_svname, rc);
1374 osp = class_name2obd(ospname);
1376 CERROR("Can't find osp-on-ost %s\n", ospname);
1377 GOTO(out, rc = -ENOENT);
1380 OBD_ALLOC_PTR(bufs);
1382 GOTO(out, rc = -ENOMEM);
1384 lustre_cfg_bufs_reset(bufs, osp->obd_name);
1385 lustre_cfg_bufs_set_string(bufs, 1, NULL);
1386 lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
1388 GOTO(out, rc = -ENOMEM);
1390 /* Disconnect import first. NULL is passed for the '@env', since
1391 * it will not be used for the 'osp-on-ost'. (see osp_shutdown()) */
1392 rc = osp->obd_lu_dev->ld_ops->ldo_process_config(NULL, osp->obd_lu_dev,
1396 lustre_cfg_free(lcfg);
1402 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1404 OBD_FREE(logname, MTI_NAME_MAXLEN);
1409 * Stop the osp(fsname-MDT0000-osp-OSTxxxx) or (fsname-MDT0000-osp-MDT0000) for an OST target.
1411 static int lustre_stop_osp(struct super_block *sb)
1413 struct lustre_sb_info *lsi = s2lsi(sb);
1414 struct obd_device *osp = NULL;
1415 char *ospname = NULL;
1419 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1423 /* Only disconnect MDT0-osp-MDT0 here, other osp on MDT
1424 * will be disconnect during MDT stack cleanup.
1425 * FIXME: remove later when quota on DNE is finished */
1426 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1433 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1434 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1436 CERROR("%s get fsname error: rc %d\n",
1437 lsi->lsi_svname, rc);
1441 osp = class_name2obd(ospname);
1443 CERROR("Can not find osp-on-ost %s\n", ospname);
1444 GOTO(cleanup, rc = -ENOENT);
1448 rc = class_manual_cleanup(osp);
1451 if (ospname != NULL)
1452 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1456 DEFINE_MUTEX(server_start_lock);
1458 /* Stop MDS/OSS if nobody is using them */
1459 static int server_stop_servers(int lsiflags)
1461 struct obd_device *obd = NULL;
1462 struct obd_type *type = NULL;
1466 mutex_lock(&server_start_lock);
1468 /* Either an MDT or an OST or neither */
1469 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1470 if ((lsiflags & LDD_F_SV_TYPE_MDT) &&
1471 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
1472 type = class_search_type(LUSTRE_MDT_NAME);
1474 /* if this was an OST, and there are no more OST's, clean up the OSS */
1475 if ((lsiflags & LDD_F_SV_TYPE_OST) &&
1476 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
1477 type = class_search_type(LUSTRE_OST_NAME);
1480 if (obd && (!type || !type->typ_refcnt)) {
1483 /* obd_fail doesn't mean much on a server obd */
1484 err = class_manual_cleanup(obd);
1489 mutex_unlock(&server_start_lock);
1494 int server_mti_print(char *title, struct mgs_target_info *mti)
1496 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1497 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1498 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1499 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1500 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1501 mti->mti_config_ver, mti->mti_flags);
1506 * Get service name (svname) from string
1508 * if endptr isn't NULL it is set to end of fsname *
1510 int server_name2svname(char *label, char *svname, char **endptr)
1515 /* We use server_name2fsname() just for parsing */
1516 rc = server_name2fsname(label, NULL, &dash);
1523 strncpy(svname, dash + 1, MTI_NAME_MAXLEN);
1527 EXPORT_SYMBOL(server_name2svname);
1530 /* Get the index from the obd name.
1531 rc = server type, or
1533 if endptr isn't NULL it is set to end of name */
1534 int server_name2index(char *svname, __u32 *idx, char **endptr)
1536 unsigned long index;
1540 /* We use server_name2fsname() just for parsing */
1541 rc = server_name2fsname(svname, NULL, &dash);
1550 if (strncmp(dash, "MDT", 3) == 0)
1551 rc = LDD_F_SV_TYPE_MDT;
1552 else if (strncmp(dash, "OST", 3) == 0)
1553 rc = LDD_F_SV_TYPE_OST;
1559 if (strcmp(dash, "all") == 0)
1560 return rc | LDD_F_SV_ALL;
1562 index = simple_strtoul(dash, endptr, 16);
1567 EXPORT_SYMBOL(server_name2index);
1569 /* Generate data for registration */
1570 static int server_lsi2mti(struct lustre_sb_info *lsi,
1571 struct mgs_target_info *mti)
1573 lnet_process_id_t id;
1577 if (!IS_SERVER(lsi))
1580 strncpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname));
1582 mti->mti_nid_count = 0;
1583 while (LNetGetId(i++, &id) != -ENOENT) {
1584 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1587 /* server use --servicenode param, only allow specified
1588 * nids be registered */
1589 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1590 class_match_nid(lsi->lsi_lmd->lmd_params,
1591 PARAM_FAILNODE, id.nid) < 1)
1594 /* match specified network */
1595 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1596 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1599 mti->mti_nids[mti->mti_nid_count] = id.nid;
1600 mti->mti_nid_count++;
1601 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1602 CWARN("Only using first %d nids for %s\n",
1603 mti->mti_nid_count, mti->mti_svname);
1608 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1609 mti->mti_config_ver = 0;
1611 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1615 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1618 /* Orion requires index to be set */
1619 LASSERT(!(rc & LDD_F_NEED_INDEX));
1620 /* keep only LDD flags */
1621 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1622 if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
1623 mti->mti_flags |= LDD_F_UPDATE;
1624 strncpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1625 sizeof(mti->mti_params));
1629 /* Register an old or new target with the MGS. If needed MGS will construct
1630 startup logs and assign index */
1631 static int server_register_target(struct lustre_sb_info *lsi)
1633 struct obd_device *mgc = lsi->lsi_mgc;
1634 struct mgs_target_info *mti = NULL;
1641 if (!IS_SERVER(lsi))
1648 rc = server_lsi2mti(lsi, mti);
1652 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1653 mti->mti_svname, mti->mti_fsname,
1654 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1657 /* if write_conf is true, the registration must succeed */
1658 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1659 mti->mti_flags |= LDD_F_OPC_REG;
1661 /* Register the target */
1662 /* FIXME use mgc_process_config instead */
1663 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1664 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1665 sizeof(*mti), mti, NULL);
1667 if (mti->mti_flags & LDD_F_ERROR) {
1668 LCONSOLE_ERROR_MSG(0x160,
1669 "The MGS is refusing to allow this "
1670 "server (%s) to start. Please see messages"
1671 " on the MGS node.\n", lsi->lsi_svname);
1672 } else if (writeconf) {
1673 LCONSOLE_ERROR_MSG(0x15f,
1674 "Communication to the MGS return error %d. "
1675 "Is the MGS running?\n", rc);
1677 CERROR("Cannot talk to the MGS: %d, not fatal\n", rc);
1678 /* reset the error code for non-fatal error. */
1691 * Notify the MGS that this target is ready.
1692 * Used by IR - if the MGS receives this message, it will notify clients.
1694 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1696 struct lustre_sb_info *lsi = s2lsi(sb);
1697 struct obd_device *mgc = lsi->lsi_mgc;
1698 struct mgs_target_info *mti = NULL;
1704 if (!(IS_SERVER(lsi)))
1710 rc = server_lsi2mti(lsi, mti);
1714 mti->mti_instance = obd->u.obt.obt_instance;
1715 mti->mti_flags |= LDD_F_OPC_READY;
1717 /* FIXME use mgc_process_config instead */
1718 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1719 sizeof(KEY_REGISTER_TARGET),
1720 KEY_REGISTER_TARGET,
1721 sizeof(*mti), mti, NULL);
1723 /* Imperative recovery: if the mgs informs us to use IR? */
1724 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1725 (mti->mti_flags & LDD_F_IR_CAPABLE))
1726 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1736 * Start the osp(fsname-MDT0000-osp-OSTxxxx) for an OST target,
1737 * which would be used to communicate with MDT0 for quota and FID.
1739 static int lustre_start_osp(struct super_block *sb)
1741 struct lustre_sb_info *lsi = s2lsi(sb);
1742 struct config_llog_instance *cfg = NULL;
1743 struct obd_device *osp;
1744 char *ospname = NULL;
1745 char *logname = NULL;
1750 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1751 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1752 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1753 if (ospname == NULL || logname == NULL)
1754 GOTO(cleanup, rc = -ENOMEM);
1756 rc = server_name2fsname(lsi->lsi_svname, ospname, &tgt);
1758 CERROR("%s change fsname error: rc %d\n",
1759 lsi->lsi_svname, rc);
1762 sprintf(logname, "%s-client", ospname);
1764 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1766 CERROR("%s change ospname error: rc %d\n",
1767 lsi->lsi_svname, rc);
1771 osp = class_name2obd(ospname);
1773 GOTO(cleanup, rc = 0);
1777 GOTO(cleanup, rc = -ENOMEM);
1779 cfg->cfg_callback = client_osp_config_process;
1780 cfg->cfg_instance = sb;
1782 rc = lustre_process_log(sb, logname, cfg);
1785 if (ospname != NULL)
1786 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1787 if (logname != NULL)
1788 OBD_FREE(logname, MTI_NAME_MAXLEN);
1795 /** Start server targets: MDTs and OSTs
1797 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1799 struct obd_device *obd;
1800 struct lustre_sb_info *lsi = s2lsi(sb);
1801 struct config_llog_instance cfg;
1803 struct lu_device *dev;
1807 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1810 /* make sure the MDS is started */
1811 mutex_lock(&server_start_lock);
1812 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1814 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1816 LUSTRE_MDS_OBDNAME"_uuid",
1819 mutex_unlock(&server_start_lock);
1820 CERROR("failed to start MDS: %d\n", rc);
1824 mutex_unlock(&server_start_lock);
1827 /* If we're an OST, make sure the global OSS is running */
1829 /* make sure OSS is started */
1830 mutex_lock(&server_start_lock);
1831 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1833 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1835 LUSTRE_OSS_OBDNAME"_uuid",
1838 mutex_unlock(&server_start_lock);
1839 CERROR("failed to start OSS: %d\n", rc);
1843 mutex_unlock(&server_start_lock);
1846 /* Set the mgc fs to our server disk. This allows the MGC to
1847 * read and write configs locally, in case it can't talk to the MGS. */
1848 if (lsi->lsi_srv_mnt) {
1849 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1851 GOTO(out_stop_service, rc);
1854 /* Register with MGS */
1855 rc = server_register_target(lsi);
1859 /* Let the target look up the mount using the target's name
1860 (we can't pass the sb or mnt through class_process_config.) */
1861 rc = server_register_mount(lsi->lsi_svname, sb, mnt);
1865 /* Start targets using the llog named for the target */
1866 memset(&cfg, 0, sizeof(cfg));
1867 cfg.cfg_callback = class_config_llog_handler;
1868 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1870 CERROR("failed to start server %s: %d\n",
1871 lsi->lsi_svname, rc);
1872 /* Do NOT call server_deregister_mount() here. This makes it
1873 * impossible to find mount later in cleanup time and leaves
1874 * @lsi and othder stuff leaked. -umka */
1878 obd = class_name2obd(lsi->lsi_svname);
1880 CERROR("no server named %s was started\n", lsi->lsi_svname);
1881 GOTO(out_mgc, rc = -ENXIO);
1884 if (IS_OST(lsi) || IS_MDT(lsi)) {
1885 rc = lustre_start_osp(sb);
1887 CERROR("%s: failed to start OSP: %d\n",
1888 lsi->lsi_svname, rc);
1893 server_notify_target(sb, obd);
1895 /* calculate recovery timeout, do it after lustre_process_log */
1896 server_calc_timeout(lsi, obd);
1898 /* log has been fully processed */
1899 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1901 /* log has been fully processed, let clients connect */
1902 dev = obd->obd_lu_dev;
1903 if (dev && dev->ld_ops->ldo_prepare) {
1904 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1906 struct lu_context session_ctx;
1908 lu_context_init(&session_ctx, LCT_SESSION);
1909 session_ctx.lc_thread = NULL;
1910 lu_context_enter(&session_ctx);
1911 env.le_ses = &session_ctx;
1913 dev->ld_ops->ldo_prepare(&env, NULL, dev);
1916 lu_context_exit(&session_ctx);
1917 lu_context_fini(&session_ctx);
1921 /* abort recovery only on the complete stack:
1922 * many devices can be involved */
1923 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1924 (OBP(obd, iocontrol))) {
1925 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1930 /* Release the mgc fs for others to use */
1931 if (lsi->lsi_srv_mnt)
1932 server_mgc_clear_fs(lsi->lsi_mgc);
1936 server_stop_servers(lsi->lsi_flags);
1941 /***************** lustre superblock **************/
1943 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1945 struct lustre_sb_info *lsi;
1951 OBD_ALLOC_PTR(lsi->lsi_lmd);
1952 if (!lsi->lsi_lmd) {
1957 lsi->lsi_lmd->lmd_exclude_count = 0;
1958 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1959 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1960 s2lsi_nocast(sb) = lsi;
1961 /* we take 1 extra ref for our setup */
1962 cfs_atomic_set(&lsi->lsi_mounts, 1);
1964 /* Default umount style */
1965 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1970 static int lustre_free_lsi(struct super_block *sb)
1972 struct lustre_sb_info *lsi = s2lsi(sb);
1975 LASSERT(lsi != NULL);
1976 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1978 /* someone didn't call server_put_mount. */
1979 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1981 if (lsi->lsi_lmd != NULL) {
1982 if (lsi->lsi_lmd->lmd_dev != NULL)
1983 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1984 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1985 if (lsi->lsi_lmd->lmd_profile != NULL)
1986 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1987 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1988 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1989 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1990 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1991 if (lsi->lsi_lmd->lmd_opts != NULL)
1992 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1993 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1994 if (lsi->lsi_lmd->lmd_exclude_count)
1995 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1996 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1997 lsi->lsi_lmd->lmd_exclude_count);
1998 if (lsi->lsi_lmd->lmd_mgs != NULL)
1999 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
2000 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
2001 if (lsi->lsi_lmd->lmd_osd_type != NULL)
2002 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
2003 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
2004 if (lsi->lsi_lmd->lmd_params != NULL)
2005 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
2007 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
2010 LASSERT(lsi->lsi_llsbi == NULL);
2011 OBD_FREE(lsi, sizeof(*lsi));
2012 s2lsi_nocast(sb) = NULL;
2017 /* The lsi has one reference for every server that is using the disk -
2018 e.g. MDT, MGS, and potentially MGC */
2019 static int lustre_put_lsi(struct super_block *sb)
2021 struct lustre_sb_info *lsi = s2lsi(sb);
2024 LASSERT(lsi != NULL);
2026 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
2027 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
2028 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
2029 obd_disconnect(lsi->lsi_osd_exp);
2030 /* wait till OSD is gone */
2031 obd_zombie_barrier();
2033 lustre_free_lsi(sb);
2039 static int lsi_prepare(struct lustre_sb_info *lsi)
2046 LASSERT(lsi->lsi_lmd);
2048 /* The server name is given as a mount line option */
2049 if (lsi->lsi_lmd->lmd_profile == NULL) {
2050 LCONSOLE_ERROR("Can't determine server name\n");
2054 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname))
2055 RETURN(-ENAMETOOLONG);
2057 strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile);
2059 /* Determine osd type */
2060 if (lsi->lsi_lmd->lmd_osd_type != NULL) {
2061 if (strlen(lsi->lsi_lmd->lmd_osd_type) >=
2062 sizeof(lsi->lsi_osd_type))
2063 RETURN(-ENAMETOOLONG);
2065 strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type);
2067 strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME);
2070 /* XXX: a temp. solution for components using fsfilt
2071 * to be removed in one of the subsequent patches */
2072 if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) {
2073 strcpy(lsi->lsi_fstype, "ldiskfs");
2075 strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type);
2078 /* Determine server type */
2079 rc = server_name2index(lsi->lsi_svname, &index, NULL);
2081 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
2082 /* Assume we're a bare MGS */
2084 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
2086 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
2091 lsi->lsi_flags |= rc;
2093 /* Add mount line flags that used to be in ldd:
2094 * writeconf, mgs, anything else?
2096 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
2097 LDD_F_WRITECONF : 0;
2098 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
2100 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
2101 LDD_F_SV_TYPE_MGS : 0;
2102 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
2103 LDD_F_NO_PRIMNODE : 0;
2108 /*************** server mount ******************/
2110 /** Start the shutdown of servers at umount.
2112 static void server_put_super(struct super_block *sb)
2114 struct lustre_sb_info *lsi = s2lsi(sb);
2115 struct obd_device *obd;
2116 char *tmpname, *extraname = NULL;
2118 int lsiflags = lsi->lsi_flags;
2121 LASSERT(IS_SERVER(lsi));
2123 tmpname_sz = strlen(lsi->lsi_svname) + 1;
2124 OBD_ALLOC(tmpname, tmpname_sz);
2125 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
2126 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
2127 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
2128 snprintf(tmpname, tmpname_sz, "MGS");
2130 /* disconnect the osp-on-ost first to drain off the inflight request */
2131 if (IS_OST(lsi) || IS_MDT(lsi)) {
2134 rc = lustre_disconnect_osp(sb);
2135 if (rc && rc != ETIMEDOUT)
2136 CERROR("%s: failed to disconnect osp-on-ost (rc=%d)!\n",
2140 /* Stop the target */
2141 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2142 (IS_MDT(lsi) || IS_OST(lsi))) {
2143 struct lustre_profile *lprof = NULL;
2145 /* tell the mgc to drop the config log */
2146 lustre_end_log(sb, lsi->lsi_svname, NULL);
2148 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
2149 If there are any setup/cleanup errors, save the lov
2150 name for safety cleanup later. */
2151 lprof = class_get_profile(lsi->lsi_svname);
2152 if (lprof && lprof->lp_dt) {
2153 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
2154 strcpy(extraname, lprof->lp_dt);
2157 obd = class_name2obd(lsi->lsi_svname);
2159 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
2160 if (lsiflags & LSI_UMOUNT_FAILOVER)
2162 /* We can't seem to give an error return code
2163 * to .put_super, so we better make sure we clean up! */
2165 class_manual_cleanup(obd);
2167 CERROR("no obd %s\n", lsi->lsi_svname);
2168 server_deregister_mount(lsi->lsi_svname);
2172 /* If they wanted the mgs to stop separately from the mdt, they
2173 should have put it on a different device. */
2175 /* if MDS start with --nomgs, don't stop MGS then */
2176 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
2177 server_stop_mgs(sb);
2180 if (IS_OST(lsi) || IS_MDT(lsi)) {
2181 if (lustre_stop_osp(sb) < 0)
2182 CERROR("%s: Fail to stop osp-on-ost!\n", tmpname);
2185 /* Clean the mgc and sb */
2186 lustre_common_put_super(sb);
2188 /* wait till all in-progress cleanups are done
2189 * specifically we're interested in ofd cleanup
2191 obd_zombie_barrier();
2193 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
2194 until the target is really gone so that our type refcount check
2196 server_stop_servers(lsiflags);
2198 /* In case of startup or cleanup err, stop related obds */
2200 obd = class_name2obd(extraname);
2202 CWARN("Cleaning orphaned obd %s\n", extraname);
2204 class_manual_cleanup(obd);
2206 OBD_FREE(extraname, strlen(extraname) + 1);
2209 LCONSOLE_WARN("server umount %s complete\n", tmpname);
2210 OBD_FREE(tmpname, tmpname_sz);
2214 /** Called only for 'umount -f'
2216 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2217 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
2219 struct super_block *sb = vfsmnt->mnt_sb;
2221 static void server_umount_begin(struct super_block *sb)
2224 struct lustre_sb_info *lsi = s2lsi(sb);
2227 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2228 if (!(flags & MNT_FORCE)) {
2234 CDEBUG(D_MOUNT, "umount -f\n");
2235 /* umount = failover
2237 no third way to do non-force, non-failover */
2238 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
2242 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
2244 struct super_block *sb = dentry->d_sb;
2245 struct lustre_sb_info *lsi = s2lsi(sb);
2246 struct obd_statfs statfs;
2250 if (lsi->lsi_dt_dev) {
2251 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
2253 statfs_unpack(buf, &statfs);
2254 buf->f_type = sb->s_magic;
2260 buf->f_type = sb->s_magic;
2261 buf->f_bsize = sb->s_blocksize;
2267 buf->f_namelen = NAME_MAX;
2271 /** The operations we support directly on the superblock:
2272 * mount, umount, and df.
2274 static struct super_operations server_ops =
2276 .put_super = server_put_super,
2277 .umount_begin = server_umount_begin, /* umount -f */
2278 .statfs = server_statfs,
2281 #define log2(n) ffz(~(n))
2282 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
2284 static int server_fill_super_common(struct super_block *sb)
2286 struct inode *root = 0;
2289 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
2291 sb->s_blocksize = 4096;
2292 sb->s_blocksize_bits = log2(sb->s_blocksize);
2293 sb->s_magic = LUSTRE_SUPER_MAGIC;
2294 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
2295 sb->s_flags |= MS_RDONLY;
2296 sb->s_op = &server_ops;
2298 root = new_inode(sb);
2300 CERROR("Can't make root inode\n");
2304 /* returns -EIO for every operation */
2305 /* make_bad_inode(root); -- badness - can't umount */
2306 /* apparently we need to be a directory for the mount to finish */
2307 root->i_mode = S_IFDIR;
2309 sb->s_root = d_make_root(root);
2311 CERROR("%s: can't make root dentry\n", sb->s_id);
2318 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
2320 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2321 struct obd_device *obd;
2322 struct dt_device_param p;
2328 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
2329 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
2331 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
2332 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
2333 strcat(lsi->lsi_osd_uuid, "_UUID");
2334 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
2336 obd = class_name2obd(lsi->lsi_osd_obdname);
2338 rc = lustre_start_simple(lsi->lsi_osd_obdname,
2340 lsi->lsi_osd_uuid, lmd->lmd_dev,
2341 flagstr, lsi->lsi_lmd->lmd_opts,
2345 obd = class_name2obd(lsi->lsi_osd_obdname);
2349 rc = obd_connect(NULL, &lsi->lsi_osd_exp, obd, &obd->obd_uuid, NULL, NULL);
2352 class_manual_cleanup(obd);
2353 lsi->lsi_dt_dev = NULL;
2356 /* XXX: to keep support old components relying on lsi_srv_mnt
2357 * we get this info from OSD just started */
2358 LASSERT(obd->obd_lu_dev);
2359 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
2360 LASSERT(lsi->lsi_dt_dev);
2362 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
2364 lsi->lsi_srv_mnt = p.ddp_mnt;
2370 /** Fill in the superblock info for a Lustre server.
2371 * Mount the device with the correct options.
2372 * Read the on-disk config file.
2373 * Start the services.
2375 static int server_fill_super(struct super_block *sb)
2377 struct lustre_sb_info *lsi = s2lsi(sb);
2381 rc = lsi_prepare(lsi);
2385 /* Start low level OSD */
2386 rc = osd_start(lsi, sb->s_flags);
2388 CERROR("Unable to start osd on %s: %d\n",
2389 lsi->lsi_lmd->lmd_dev, rc);
2394 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
2395 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
2397 if (class_name2obd(lsi->lsi_svname)) {
2398 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
2399 "running. Double-mount may have compromised"
2400 " the disk journal.\n",
2406 /* Start MGS before MGC */
2407 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
2408 rc = server_start_mgs(sb);
2413 /* Start MGC before servers */
2414 rc = lustre_start_mgc(sb);
2418 /* Set up all obd devices for service */
2419 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2420 (IS_OST(lsi) || IS_MDT(lsi))) {
2421 rc = server_start_targets(sb, lsi->lsi_srv_mnt);
2423 CERROR("Unable to start targets: %d\n", rc);
2426 /* FIXME overmount client here,
2427 or can we just start a client log and client_fill_super on this sb?
2428 We need to make sure server_put_super gets called too - ll_put_super
2429 calls lustre_common_put_super; check there for LSI_SERVER flag,
2431 Probably should start client from new thread so we can return.
2432 Client will not finish until all servers are connected.
2433 Note - MGS-only server does NOT get a client, since there is no
2434 lustre fs associated - the MGS is for all lustre fs's */
2437 rc = server_fill_super_common(sb);
2443 /* We jump here in case of failure while starting targets or MGS.
2444 * In this case we can't just put @mnt and have to do real cleanup
2445 * with stoping targets, etc. */
2446 server_put_super(sb);
2451 * Calculate timeout value for a target.
2453 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
2455 struct lustre_mount_data *lmd;
2459 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
2460 int min = OBD_RECOVERY_TIME_MIN;
2462 LASSERT(IS_SERVER(lsi));
2466 soft = lmd->lmd_recovery_time_soft;
2467 hard = lmd->lmd_recovery_time_hard;
2468 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
2469 obd->obd_no_ir = !has_ir;
2473 soft = OBD_RECOVERY_TIME_SOFT;
2475 hard = OBD_RECOVERY_TIME_HARD;
2477 /* target may have ir_factor configured. */
2478 factor = OBD_IR_FACTOR_DEFAULT;
2479 if (obd->obd_recovery_ir_factor)
2480 factor = obd->obd_recovery_ir_factor;
2483 int new_soft = soft;
2484 int new_hard = hard;
2486 /* adjust timeout value by imperative recovery */
2488 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
2489 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
2491 /* make sure the timeout is not too short */
2492 new_soft = max(min, new_soft);
2493 new_hard = max(new_soft, new_hard);
2495 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
2496 "window shrunk from %d-%d down to %d-%d\n",
2497 obd->obd_name, soft, hard, new_soft, new_hard);
2504 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
2505 obd->obd_recovery_time_hard = hard;
2506 obd->obd_recovery_ir_factor = factor;
2508 EXPORT_SYMBOL(server_calc_timeout);
2510 /*************** mount common betweeen server and client ***************/
2513 int lustre_common_put_super(struct super_block *sb)
2518 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
2520 /* Drop a ref to the MGC */
2521 rc = lustre_stop_mgc(sb);
2522 if (rc && (rc != -ENOENT)) {
2524 CERROR("Can't stop MGC: %d\n", rc);
2527 /* BUSY just means that there's some other obd that
2528 needs the mgc. Let him clean it up. */
2529 CDEBUG(D_MOUNT, "MGC still in use\n");
2531 /* Drop a ref to the mounted disk */
2536 EXPORT_SYMBOL(lustre_common_put_super);
2538 static void lmd_print(struct lustre_mount_data *lmd)
2542 PRINT_CMD(PRINT_MASK, " mount data:\n");
2543 if (lmd_is_client(lmd))
2544 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
2545 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
2546 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
2549 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
2551 if (lmd->lmd_recovery_time_soft)
2552 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
2553 lmd->lmd_recovery_time_soft);
2555 if (lmd->lmd_recovery_time_hard)
2556 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
2557 lmd->lmd_recovery_time_hard);
2559 for (i = 0; i < lmd->lmd_exclude_count; i++) {
2560 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
2561 lmd->lmd_exclude[i]);
2565 /* Is this server on the exclusion list */
2566 int lustre_check_exclusion(struct super_block *sb, char *svname)
2568 struct lustre_sb_info *lsi = s2lsi(sb);
2569 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2574 rc = server_name2index(svname, &index, NULL);
2575 if (rc != LDD_F_SV_TYPE_OST)
2576 /* Only exclude OSTs */
2579 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
2580 index, lmd->lmd_exclude_count, lmd->lmd_dev);
2582 for(i = 0; i < lmd->lmd_exclude_count; i++) {
2583 if (index == lmd->lmd_exclude[i]) {
2584 CWARN("Excluding %s (on exclusion list)\n", svname);
2591 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
2592 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
2594 char *s1 = ptr, *s2;
2595 __u32 index, *exclude_list;
2599 /* The shortest an ost name can be is 8 chars: -OST0000.
2600 We don't actually know the fsname at this time, so in fact
2601 a user could specify any fsname. */
2602 devmax = strlen(ptr) / 8 + 1;
2604 /* temp storage until we figure out how many we have */
2605 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
2609 /* we enter this fn pointing at the '=' */
2610 while (*s1 && *s1 != ' ' && *s1 != ',') {
2612 rc = server_name2index(s1, &index, &s2);
2614 CERROR("Can't parse server name '%s'\n", s1);
2617 if (rc == LDD_F_SV_TYPE_OST)
2618 exclude_list[lmd->lmd_exclude_count++] = index;
2620 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
2622 /* now we are pointing at ':' (next exclude)
2623 or ',' (end of excludes) */
2624 if (lmd->lmd_exclude_count >= devmax)
2627 if (rc >= 0) /* non-err */
2630 if (lmd->lmd_exclude_count) {
2631 /* permanent, freed in lustre_free_lsi */
2632 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
2633 lmd->lmd_exclude_count);
2634 if (lmd->lmd_exclude) {
2635 memcpy(lmd->lmd_exclude, exclude_list,
2636 sizeof(index) * lmd->lmd_exclude_count);
2639 lmd->lmd_exclude_count = 0;
2642 OBD_FREE(exclude_list, sizeof(index) * devmax);
2646 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
2651 if (lmd->lmd_mgssec != NULL) {
2652 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
2653 lmd->lmd_mgssec = NULL;
2656 tail = strchr(ptr, ',');
2658 length = strlen(ptr);
2660 length = tail - ptr;
2662 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
2663 if (lmd->lmd_mgssec == NULL)
2666 memcpy(lmd->lmd_mgssec, ptr, length);
2667 lmd->lmd_mgssec[length] = '\0';
2671 static int lmd_parse_string(char **handle, char *ptr)
2676 if ((handle == NULL) || (ptr == NULL))
2679 if (*handle != NULL) {
2680 OBD_FREE(*handle, strlen(*handle) + 1);
2684 tail = strchr(ptr, ',');
2686 length = strlen(ptr);
2688 length = tail - ptr;
2690 OBD_ALLOC(*handle, length + 1);
2691 if (*handle == NULL)
2694 memcpy(*handle, ptr, length);
2695 (*handle)[length] = '\0';
2700 /* Collect multiple values for mgsnid specifiers */
2701 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
2709 /* Find end of nidlist */
2710 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
2711 length = tail - *ptr;
2713 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
2717 if (lmd->lmd_mgs != NULL)
2718 oldlen = strlen(lmd->lmd_mgs) + 1;
2720 OBD_ALLOC(mgsnid, oldlen + length + 1);
2724 if (lmd->lmd_mgs != NULL) {
2725 /* Multiple mgsnid= are taken to mean failover locations */
2726 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
2727 mgsnid[oldlen - 1] = ':';
2728 OBD_FREE(lmd->lmd_mgs, oldlen);
2730 memcpy(mgsnid + oldlen, *ptr, length);
2731 mgsnid[oldlen + length] = '\0';
2732 lmd->lmd_mgs = mgsnid;
2738 /** Parse mount line options
2739 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
2740 * dev is passed as device=uml1:/lustre by mount.lustre
2742 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
2744 char *s1, *s2, *devname = NULL;
2745 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
2751 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
2752 "/sbin/mount.lustre is installed.\n");
2756 /* Options should be a string - try to detect old lmd data */
2757 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
2758 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
2759 "/sbin/mount.lustre. Please install "
2760 "version %s\n", LUSTRE_VERSION_STRING);
2763 lmd->lmd_magic = LMD_MAGIC;
2765 OBD_ALLOC(lmd->lmd_params, 4096);
2766 if (lmd->lmd_params == NULL)
2768 lmd->lmd_params[0] = '\0';
2770 /* Set default flags here */
2775 int time_min = OBD_RECOVERY_TIME_MIN;
2777 /* Skip whitespace and extra commas */
2778 while (*s1 == ' ' || *s1 == ',')
2781 /* Client options are parsed in ll_options: eg. flock,
2784 /* Parse non-ldiskfs options here. Rather than modifying
2785 ldiskfs, we just zero these out here */
2786 if (strncmp(s1, "abort_recov", 11) == 0) {
2787 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
2789 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
2790 lmd->lmd_recovery_time_soft = max_t(int,
2791 simple_strtoul(s1 + 19, NULL, 10), time_min);
2793 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
2794 lmd->lmd_recovery_time_hard = max_t(int,
2795 simple_strtoul(s1 + 19, NULL, 10), time_min);
2797 } else if (strncmp(s1, "noir", 4) == 0) {
2798 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
2800 } else if (strncmp(s1, "nosvc", 5) == 0) {
2801 lmd->lmd_flags |= LMD_FLG_NOSVC;
2803 } else if (strncmp(s1, "nomgs", 5) == 0) {
2804 lmd->lmd_flags |= LMD_FLG_NOMGS;
2806 } else if (strncmp(s1, "noscrub", 7) == 0) {
2807 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
2809 } else if (strncmp(s1, PARAM_MGSNODE,
2810 sizeof(PARAM_MGSNODE) - 1) == 0) {
2811 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
2812 /* Assume the next mount opt is the first
2813 invalid nid we get to. */
2814 rc = lmd_parse_mgs(lmd, &s2);
2818 } else if (strncmp(s1, "writeconf", 9) == 0) {
2819 lmd->lmd_flags |= LMD_FLG_WRITECONF;
2821 } else if (strncmp(s1, "virgin", 6) == 0) {
2822 lmd->lmd_flags |= LMD_FLG_VIRGIN;
2824 } else if (strncmp(s1, "noprimnode", 10) == 0) {
2825 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
2827 } else if (strncmp(s1, "mgssec=", 7) == 0) {
2828 rc = lmd_parse_mgssec(lmd, s1 + 7);
2832 /* ost exclusion list */
2833 } else if (strncmp(s1, "exclude=", 8) == 0) {
2834 rc = lmd_make_exclusion(lmd, s1 + 7);
2838 } else if (strncmp(s1, "mgs", 3) == 0) {
2840 lmd->lmd_flags |= LMD_FLG_MGS;
2842 } else if (strncmp(s1, "svname=", 7) == 0) {
2843 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
2847 } else if (strncmp(s1, "param=", 6) == 0) {
2849 char *tail = strchr(s1 + 6, ',');
2851 length = strlen(s1);
2855 strncat(lmd->lmd_params, s1 + 6, length);
2856 strcat(lmd->lmd_params, " ");
2858 } else if (strncmp(s1, "osd=", 4) == 0) {
2859 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
2864 /* Linux 2.4 doesn't pass the device, so we stuck it at the
2865 end of the options. */
2866 else if (strncmp(s1, "device=", 7) == 0) {
2868 /* terminate options right before device. device
2869 must be the last one. */
2875 s2 = strchr(s1, ',');
2883 memmove(s1, s2, strlen(s2) + 1);
2889 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2890 "(need mount option 'device=...')\n");
2894 s1 = strstr(devname, ":/");
2897 lmd->lmd_flags |= LMD_FLG_CLIENT;
2898 /* Remove leading /s from fsname */
2899 while (*++s1 == '/') ;
2900 /* Freed in lustre_free_lsi */
2901 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2902 if (!lmd->lmd_profile)
2904 sprintf(lmd->lmd_profile, "%s-client", s1);
2907 /* Freed in lustre_free_lsi */
2908 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2911 strcpy(lmd->lmd_dev, devname);
2913 /* Save mount options */
2914 s1 = options + strlen(options) - 1;
2915 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2917 if (*options != 0) {
2918 /* Freed in lustre_free_lsi */
2919 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2922 strcpy(lmd->lmd_opts, options);
2926 lmd->lmd_magic = LMD_MAGIC;
2931 CERROR("Bad mount options %s\n", options);
2935 struct lustre_mount_data2 {
2937 struct vfsmount *lmd2_mnt;
2940 /** This is the entry point for the mount call into Lustre.
2941 * This is called when a server or client is mounted,
2942 * and this is where we start setting things up.
2943 * @param data Mount options (e.g. -o flock,abort_recov)
2945 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2947 struct lustre_mount_data *lmd;
2948 struct lustre_mount_data2 *lmd2 = data;
2949 struct lustre_sb_info *lsi;
2953 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2955 lsi = lustre_init_lsi(sb);
2961 * Disable lockdep during mount, because mount locking patterns are
2967 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
2969 obd_zombie_barrier();
2971 /* Figure out the lmd from the mount options */
2972 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
2974 GOTO(out, rc = -EINVAL);
2977 if (lmd_is_client(lmd)) {
2978 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2979 if (!client_fill_super) {
2980 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2981 "client mount! Is the 'lustre' "
2982 "module loaded?\n");
2986 rc = lustre_start_mgc(sb);
2991 /* Connect and start */
2992 /* (should always be ll_fill_super) */
2993 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
2994 /* c_f_s will call lustre_common_put_super on failure */
2997 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2998 rc = server_fill_super(sb);
2999 /* s_f_s calls lustre_start_mgc after the mount because we need
3000 the MGS nids which are stored on disk. Plus, we may
3001 need to start the MGS first. */
3002 /* s_f_s will call server_put_super on failure */
3005 /* If error happens in fill_super() call, @lsi will be killed there.
3006 * This is why we do not put it here. */
3010 CERROR("Unable to mount %s (%d)\n",
3011 s2lsi(sb) ? lmd->lmd_dev : "", rc);
3013 CDEBUG(D_SUPER, "Mount %s complete\n",
3021 /* We can't call ll_fill_super by name because it lives in a module that
3022 must be loaded after this one. */
3023 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
3024 struct vfsmount *mnt))
3026 client_fill_super = cfs;
3028 EXPORT_SYMBOL(lustre_register_client_fill_super);
3030 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
3032 kill_super_cb = cfs;
3034 EXPORT_SYMBOL(lustre_register_kill_super_cb);
3036 /***************** FS registration ******************/
3037 #ifdef HAVE_FSTYPE_MOUNT
3038 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
3039 const char *devname, void *data)
3041 struct lustre_mount_data2 lmd2 = { data, NULL };
3043 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
3046 int lustre_get_sb(struct file_system_type *fs_type, int flags,
3047 const char *devname, void * data, struct vfsmount *mnt)
3049 struct lustre_mount_data2 lmd2 = { data, mnt };
3051 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
3055 void lustre_kill_super(struct super_block *sb)
3057 struct lustre_sb_info *lsi = s2lsi(sb);
3059 if (kill_super_cb && lsi && !IS_SERVER(lsi))
3060 (*kill_super_cb)(sb);
3062 kill_anon_super(sb);
3065 /** Register the "lustre" fs type
3067 struct file_system_type lustre_fs_type = {
3068 .owner = THIS_MODULE,
3070 #ifdef HAVE_FSTYPE_MOUNT
3071 .mount = lustre_mount,
3073 .get_sb = lustre_get_sb,
3075 .kill_sb = lustre_kill_super,
3076 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
3077 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
3080 int lustre_register_fs(void)
3082 return register_filesystem(&lustre_fs_type);
3085 int lustre_unregister_fs(void)
3087 return unregister_filesystem(&lustre_fs_type);
3090 EXPORT_SYMBOL(server_mti_print);