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;
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 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_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;
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 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
826 * @param [in] svname server name including type and index
827 * @param [out] fsname Buffer to copy filesystem name prefix into.
828 * Must have at least 'strlen(fsname) + 1' chars.
829 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
832 int server_name2fsname(char *svname, char *fsname, char **endptr)
834 char *dash = strrchr(svname, '-');
836 dash = strrchr(svname, ':');
841 /* interpret <fsname>-MDTXXXXX-mdc as mdt, the better way is to pass
842 * in the fsname, then determine the server index */
843 if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) {
845 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
851 if (fsname != NULL) {
852 strncpy(fsname, svname, dash - svname);
853 fsname[dash - svname] = '\0';
861 EXPORT_SYMBOL(server_name2fsname);
863 static int is_mdc_device(char *devname)
866 ptr = strrchr(devname, '-');
867 if (ptr != NULL && strcmp(ptr, "-mdc") == 0)
872 static int inline tgt_is_mdt0(char *tgtname)
877 type = server_name2index(tgtname, &idx, NULL);
878 if (type != LDD_F_SV_TYPE_MDT)
881 return (idx == 0) ? 1 :0;
884 static int inline is_mdc_for_mdt0(char *devname)
888 if (!is_mdc_device(devname))
891 ptr = strrchr(devname, '-');
896 if (tgt_is_mdt0(devname)) {
905 * Convert OST/MDT name(fsname-OSTxxxx) to an osp name
906 * (fsname-MDT0000-osp-OSTxxxx), which will be used to
907 * communicate with MDT0 for this target.
909 int tgt_name2ospname(char *svname, char *ospname)
916 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
920 rc = server_name2fsname(svname, fsname, &tgt);
922 CERROR("%s change fsname error: rc %d\n", svname, rc);
926 if (*tgt != '-' && *tgt != ':') {
927 CERROR("%s wrong svname name!\n", svname);
928 GOTO(cleanup, rc = -EINVAL);
932 if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
933 CERROR("%s is not an OST or MDT target!\n", svname);
934 GOTO(cleanup, rc = -EINVAL);
936 sprintf(ospname, "%s-MDT0000-%s-%s", fsname, LUSTRE_OSP_NAME, tgt);
939 OBD_FREE(fsname, MTI_NAME_MAXLEN);
942 EXPORT_SYMBOL(tgt_name2ospname);
944 static CFS_LIST_HEAD(osp_register_list);
945 CFS_DEFINE_MUTEX(osp_register_list_lock);
947 int lustre_register_osp_item(char *ospname, struct obd_export **exp,
948 register_osp_cb cb_func, void *cb_data)
950 struct obd_device *osp;
951 struct osp_register_item *ori;
954 LASSERTF(strlen(ospname) < MTI_NAME_MAXLEN, "ospname is too long %s\n",
956 LASSERT(exp != NULL && *exp == NULL);
962 cfs_mutex_lock(&osp_register_list_lock);
964 osp = class_name2obd(ospname);
965 if (osp != NULL && osp->obd_set_up == 1) {
966 struct obd_uuid *uuid;
970 cfs_mutex_unlock(&osp_register_list_lock);
973 memcpy(uuid->uuid, ospname, strlen(ospname));
974 *exp = cfs_hash_lookup(osp->obd_uuid_hash, uuid);
978 memcpy(ori->ori_name, ospname, strlen(ospname));
980 ori->ori_cb_func = cb_func;
981 ori->ori_cb_data = cb_data;
982 CFS_INIT_LIST_HEAD(&ori->ori_list);
983 cfs_list_add(&ori->ori_list, &osp_register_list);
985 if (*exp != NULL && cb_func != NULL)
988 cfs_mutex_unlock(&osp_register_list_lock);
991 EXPORT_SYMBOL(lustre_register_osp_item);
993 void lustre_deregister_osp_item(struct obd_export **exp)
995 struct osp_register_item *ori, *tmp;
997 cfs_mutex_lock(&osp_register_list_lock);
998 cfs_list_for_each_entry_safe(ori, tmp, &osp_register_list, ori_list) {
999 if (exp == ori->ori_exp) {
1001 class_export_put(*exp);
1002 cfs_list_del(&ori->ori_list);
1007 cfs_mutex_unlock(&osp_register_list_lock);
1009 EXPORT_SYMBOL(lustre_deregister_osp_item);
1011 static void lustre_notify_osp_list(struct obd_export *exp)
1013 struct osp_register_item *ori, *tmp;
1014 LASSERT(exp != NULL);
1016 cfs_mutex_lock(&osp_register_list_lock);
1017 cfs_list_for_each_entry_safe(ori, tmp, &osp_register_list, ori_list) {
1018 if (strcmp(exp->exp_obd->obd_name, ori->ori_name))
1020 if (*ori->ori_exp != NULL)
1022 *ori->ori_exp = class_export_get(exp);
1023 if (ori->ori_cb_func != NULL)
1024 ori->ori_cb_func(ori->ori_cb_data);
1026 cfs_mutex_unlock(&osp_register_list_lock);
1029 static int lustre_osp_connect(struct obd_device *osp)
1032 struct lu_context session_ctx;
1033 struct obd_export *exp;
1034 struct obd_uuid *uuid = NULL;
1035 struct obd_connect_data *data = NULL;
1039 /* log has been fully processed, let clients connect */
1040 rc = lu_env_init(&env, osp->obd_lu_dev->ld_type->ldt_ctx_tags);
1044 lu_context_init(&session_ctx, LCT_SESSION);
1045 session_ctx.lc_thread = NULL;
1046 lu_context_enter(&session_ctx);
1047 env.le_ses = &session_ctx;
1049 OBD_ALLOC_PTR(data);
1051 GOTO(out, rc = -ENOMEM);
1053 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
1054 data->ocd_version = LUSTRE_VERSION_CODE;
1055 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
1056 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_IBITS |
1057 OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
1058 OBD_CONNECT_AT | OBD_CONNECT_FULL20 |
1059 OBD_CONNECT_LIGHTWEIGHT;
1060 OBD_ALLOC_PTR(uuid);
1062 GOTO(out, rc = -ENOMEM);
1064 if (strlen(osp->obd_name) > sizeof(uuid->uuid)) {
1065 CERROR("%s: Too long osp name %s, max_size is %d\n",
1066 osp->obd_name, osp->obd_name, (int)sizeof(uuid->uuid));
1067 GOTO(out, rc = -EINVAL);
1069 /* Use osp name as the uuid, so we find the export by
1071 memcpy(uuid->uuid, osp->obd_name, strlen(osp->obd_name));
1072 rc = obd_connect(&env, &exp, osp, uuid, data, NULL);
1074 CERROR("%s: connect failed: rc = %d\n", osp->obd_name, rc);
1076 lustre_notify_osp_list(exp);
1085 lu_context_exit(&session_ctx);
1086 lu_context_fini(&session_ctx);
1092 * osp-on-ost is used by slaves (Non-MDT0 targets) to manage the connection
1095 * The OSTs will communicate with MDT0 by the connection established by the
1096 * osp-on-ost to get quota and fid sequence.
1099 static int lustre_osp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi)
1101 struct obd_connect_data *data = NULL;
1102 struct obd_device *obd;
1103 char *ospname = NULL;
1104 char *ospuuid = NULL;
1108 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1111 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
1115 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1116 if (ospname == NULL)
1117 GOTO(out, rc = -ENOMEM);
1119 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1121 CERROR("%s change ospname error: rc %d\n",
1122 lsi->lsi_svname, rc);
1126 OBD_ALLOC(ospuuid, MTI_NAME_MAXLEN);
1127 if (ospuuid == NULL)
1128 GOTO(out, rc = -ENOMEM);
1130 sprintf(ospuuid, "%s_UUID", ospname);
1131 rc = lustre_start_simple(ospname, LUSTRE_OSP_NAME,
1132 ospuuid, lustre_cfg_string(lcfg, 1),
1135 CERROR("%s: setup up failed: rc %d\n", ospname, rc);
1139 obd = class_name2obd(ospname);
1140 LASSERT(obd != NULL);
1142 rc = lustre_osp_connect(obd);
1144 CERROR("%s: connect failed: rc = %d\n", ospname, rc);
1148 if (ospname != NULL)
1149 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1150 if (ospuuid != NULL)
1151 OBD_FREE(ospuuid, MTI_NAME_MAXLEN);
1156 static int lustre_osp_add_conn(struct lustre_cfg *cfg,
1157 struct lustre_sb_info *lsi)
1159 struct lustre_cfg_bufs *bufs = NULL;
1160 struct lustre_cfg *lcfg = NULL;
1161 char *ospname = NULL;
1162 struct obd_device *osp;
1166 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1167 if (ospname == NULL)
1168 GOTO(out, rc = -ENOMEM);
1170 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1172 CERROR("%s change ospname error: rc %d\n",
1173 lsi->lsi_svname, rc);
1177 OBD_ALLOC_PTR(bufs);
1181 lustre_cfg_bufs_reset(bufs, ospname);
1182 lustre_cfg_bufs_set_string(bufs, 1,
1183 lustre_cfg_string(cfg, 1));
1185 lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
1187 osp = class_name2obd(ospname);
1189 CERROR("Can not find %s\n", ospname);
1190 GOTO(out, rc = -EINVAL);
1193 rc = class_add_conn(osp, lcfg);
1195 CERROR("%s: can't add conn: rc = %d\n", ospname, rc);
1201 lustre_cfg_free(lcfg);
1202 if (ospname != NULL)
1203 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1209 * Retrieve MDT nids from the client log, then start the osp-on-ost device.
1210 * there are only two scenarios which would include mdt nid.
1212 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx-
1213 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
1214 * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID
1215 * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp
1216 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
1217 * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp
1218 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx
1219 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx-
1221 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1222 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
1223 * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp
1224 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1226 static int client_osp_config_process(const struct lu_env *env,
1227 struct llog_handle *handle,
1228 struct llog_rec_hdr *rec, void *data)
1230 struct config_llog_instance *clli = data;
1231 int cfg_len = rec->lrh_len;
1232 char *cfg_buf = (char *) (rec + 1);
1233 struct lustre_cfg *lcfg = NULL;
1234 struct lustre_sb_info *lsi;
1235 int rc = 0, swab = 0;
1238 if (rec->lrh_type != OBD_CFG_REC) {
1239 CERROR("Unknown llog record type %#x encountered\n",
1244 LASSERT(clli->cfg_sb != NULL);
1245 lsi = s2lsi(clli->cfg_sb);
1247 lcfg = (struct lustre_cfg *)cfg_buf;
1248 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1249 lustre_swab_lustre_cfg(lcfg);
1253 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1257 switch (lcfg->lcfg_command) {
1259 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1261 lustre_swab_cfg_marker(marker, swab,
1262 LUSTRE_CFG_BUFLEN(lcfg, 1));
1263 if (marker->cm_flags & CM_SKIP ||
1264 marker->cm_flags & CM_EXCLUDE)
1267 if (!tgt_is_mdt0(marker->cm_tgtname))
1270 if(!strncmp(marker->cm_comment, "add mdc", 7) ||
1271 !strncmp(marker->cm_comment, "add failnid", 11)) {
1272 if (marker->cm_flags & CM_START) {
1273 clli->cfg_flags = CFG_F_MARKER;
1274 /* This hack is to differentiate the
1275 * ADD_UUID is come from "add mdc" record
1276 * or from "add failnid" record. */
1277 if (!strncmp(marker->cm_comment,
1279 clli->cfg_flags |= CFG_F_SKIP;
1280 } else if (marker->cm_flags & CM_END) {
1281 clli->cfg_flags = 0;
1286 case LCFG_ADD_UUID: {
1287 if (clli->cfg_flags == CFG_F_MARKER) {
1288 rc = lustre_osp_setup(lcfg, lsi);
1289 /* XXX: process only the first nid as
1290 * we don't need another instance of osp */
1291 clli->cfg_flags |= CFG_F_SKIP;
1292 } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
1293 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1296 CERROR("%s: Fail to add uuid, rc:%d\n",
1297 lsi->lsi_svname, rc);
1301 case LCFG_ADD_CONN: {
1302 if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0)))
1303 rc = lustre_osp_add_conn(lcfg, lsi);
1313 static int lustre_disconnect_osp(struct super_block *sb)
1315 struct lustre_sb_info *lsi = s2lsi(sb);
1316 struct obd_device *osp;
1317 char *ospname = NULL;
1318 char *logname = NULL;
1319 struct lustre_cfg *lcfg = NULL;
1320 struct lustre_cfg_bufs *bufs = NULL;
1321 struct config_llog_instance *cfg = NULL;
1325 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1326 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1327 if (logname == NULL)
1330 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1331 if (ospname == NULL)
1332 GOTO(out, rc = -ENOMEM);
1334 rc = server_name2fsname(lsi->lsi_svname, ospname, NULL);
1336 CERROR("%s: get fsname error: %d\n",
1337 lsi->lsi_svname, rc);
1340 sprintf(logname, "%s-client", ospname);
1344 GOTO(out, rc = -ENOMEM);
1347 cfg->cfg_instance = sb;
1348 rc = lustre_end_log(sb, logname, cfg);
1350 CERROR("Can't end config log %s\n", ospname);
1354 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1356 CERROR("%s: get osp name error: %d\n",
1357 lsi->lsi_svname, rc);
1361 osp = class_name2obd(ospname);
1363 CERROR("Can't find osp-on-ost %s\n", ospname);
1364 GOTO(out, rc = -ENOENT);
1367 OBD_ALLOC_PTR(bufs);
1369 GOTO(out, rc = -ENOMEM);
1371 lustre_cfg_bufs_reset(bufs, osp->obd_name);
1372 lustre_cfg_bufs_set_string(bufs, 1, NULL);
1373 lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
1375 GOTO(out, rc = -ENOMEM);
1377 /* Disconnect import first. NULL is passed for the '@env', since
1378 * it will not be used for the 'osp-on-ost'. (see osp_shutdown()) */
1379 rc = osp->obd_lu_dev->ld_ops->ldo_process_config(NULL, osp->obd_lu_dev,
1383 lustre_cfg_free(lcfg);
1389 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1391 OBD_FREE(logname, MTI_NAME_MAXLEN);
1396 * Stop the osp(fsname-MDT0000-osp-OSTxxxx) for an OST target.
1398 static int lustre_stop_osp(struct super_block *sb)
1400 struct lustre_sb_info *lsi = s2lsi(sb);
1401 struct obd_device *osp = NULL;
1402 char *ospname = NULL;
1406 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1407 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1409 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1411 CERROR("%s get fsname error: rc %d\n",
1412 lsi->lsi_svname, rc);
1416 osp = class_name2obd(ospname);
1418 CERROR("Can not find osp-on-ost %s\n", ospname);
1419 GOTO(cleanup, rc = -ENOENT);
1423 rc = class_manual_cleanup(osp);
1426 if (ospname != NULL)
1427 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1431 CFS_DEFINE_MUTEX(server_start_lock);
1433 /* Stop MDS/OSS if nobody is using them */
1434 static int server_stop_servers(int lsiflags)
1436 struct obd_device *obd = NULL;
1437 struct obd_type *type = NULL;
1441 cfs_mutex_lock(&server_start_lock);
1443 /* Either an MDT or an OST or neither */
1444 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1445 if ((lsiflags & LDD_F_SV_TYPE_MDT) &&
1446 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
1447 /*FIXME pre-rename, should eventually be LUSTRE_MDT_NAME*/
1448 type = class_search_type(LUSTRE_MDS_NAME);
1450 /* if this was an OST, and there are no more OST's, clean up the OSS */
1451 if ((lsiflags & LDD_F_SV_TYPE_OST) &&
1452 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
1453 type = class_search_type(LUSTRE_OST_NAME);
1456 if (obd && (!type || !type->typ_refcnt)) {
1459 /* obd_fail doesn't mean much on a server obd */
1460 err = class_manual_cleanup(obd);
1465 cfs_mutex_unlock(&server_start_lock);
1470 int server_mti_print(char *title, struct mgs_target_info *mti)
1472 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1473 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1474 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1475 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1476 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1477 mti->mti_config_ver, mti->mti_flags);
1482 * Get service name (svname) from string
1484 * if endptr isn't NULL it is set to end of fsname *
1486 int server_name2svname(char *label, char *svname, char **endptr)
1491 /* We use server_name2fsname() just for parsing */
1492 rc = server_name2fsname(label, NULL, &dash);
1499 strncpy(svname, dash + 1, MTI_NAME_MAXLEN);
1503 EXPORT_SYMBOL(server_name2svname);
1506 /* Get the index from the obd name.
1507 rc = server type, or
1509 if endptr isn't NULL it is set to end of name */
1510 int server_name2index(char *svname, __u32 *idx, char **endptr)
1512 unsigned long index;
1516 /* We use server_name2fsname() just for parsing */
1517 rc = server_name2fsname(svname, NULL, &dash);
1526 if (strncmp(dash, "MDT", 3) == 0)
1527 rc = LDD_F_SV_TYPE_MDT;
1528 else if (strncmp(dash, "OST", 3) == 0)
1529 rc = LDD_F_SV_TYPE_OST;
1535 if (strcmp(dash, "all") == 0)
1536 return rc | LDD_F_SV_ALL;
1538 index = simple_strtoul(dash, endptr, 16);
1543 EXPORT_SYMBOL(server_name2index);
1545 /* Generate data for registration */
1546 static int server_lsi2mti(struct lustre_sb_info *lsi,
1547 struct mgs_target_info *mti)
1549 lnet_process_id_t id;
1553 if (!IS_SERVER(lsi))
1556 strncpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname));
1558 mti->mti_nid_count = 0;
1559 while (LNetGetId(i++, &id) != -ENOENT) {
1560 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1563 /* server use --servicenode param, only allow specified
1564 * nids be registered */
1565 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1566 class_match_nid(lsi->lsi_lmd->lmd_params,
1567 PARAM_FAILNODE, id.nid) < 1)
1570 /* match specified network */
1571 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1572 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1575 mti->mti_nids[mti->mti_nid_count] = id.nid;
1576 mti->mti_nid_count++;
1577 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1578 CWARN("Only using first %d nids for %s\n",
1579 mti->mti_nid_count, mti->mti_svname);
1584 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1585 mti->mti_config_ver = 0;
1587 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1591 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1594 /* Orion requires index to be set */
1595 LASSERT(!(rc & LDD_F_NEED_INDEX));
1596 /* keep only LDD flags */
1597 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1598 mti->mti_flags |= LDD_F_UPDATE;
1599 strncpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1600 sizeof(mti->mti_params));
1604 /* Register an old or new target with the MGS. If needed MGS will construct
1605 startup logs and assign index */
1606 static int server_register_target(struct lustre_sb_info *lsi)
1608 struct obd_device *mgc = lsi->lsi_mgc;
1609 struct mgs_target_info *mti = NULL;
1616 if (!IS_SERVER(lsi))
1623 rc = server_lsi2mti(lsi, mti);
1627 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1628 mti->mti_svname, mti->mti_fsname,
1629 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1632 /* if write_conf is true, the registration must succeed */
1633 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1634 mti->mti_flags |= LDD_F_OPC_REG;
1636 /* Register the target */
1637 /* FIXME use mgc_process_config instead */
1638 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1639 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1640 sizeof(*mti), mti, NULL);
1642 if (mti->mti_flags & LDD_F_ERROR) {
1643 LCONSOLE_ERROR_MSG(0x160,
1644 "The MGS is refusing to allow this "
1645 "server (%s) to start. Please see messages"
1646 " on the MGS node.\n", lsi->lsi_svname);
1647 } else if (writeconf) {
1648 LCONSOLE_ERROR_MSG(0x15f,
1649 "Communication to the MGS return error %d. "
1650 "Is the MGS running?\n", rc);
1652 CERROR("Cannot talk to the MGS: %d, not fatal\n", rc);
1653 /* reset the error code for non-fatal error. */
1666 * Notify the MGS that this target is ready.
1667 * Used by IR - if the MGS receives this message, it will notify clients.
1669 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1671 struct lustre_sb_info *lsi = s2lsi(sb);
1672 struct obd_device *mgc = lsi->lsi_mgc;
1673 struct mgs_target_info *mti = NULL;
1679 if (!(IS_SERVER(lsi)))
1685 rc = server_lsi2mti(lsi, mti);
1689 mti->mti_instance = obd->u.obt.obt_instance;
1690 mti->mti_flags |= LDD_F_OPC_READY;
1692 /* FIXME use mgc_process_config instead */
1693 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1694 sizeof(KEY_REGISTER_TARGET),
1695 KEY_REGISTER_TARGET,
1696 sizeof(*mti), mti, NULL);
1698 /* Imperative recovery: if the mgs informs us to use IR? */
1699 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1700 (mti->mti_flags & LDD_F_IR_CAPABLE))
1701 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1711 * Start the osp(fsname-MDT0000-osp-OSTxxxx) for an OST target,
1712 * which would be used to communicate with MDT0 for quota and FID.
1714 static int lustre_start_osp(struct super_block *sb)
1716 struct lustre_sb_info *lsi = s2lsi(sb);
1717 struct config_llog_instance *cfg = NULL;
1718 struct obd_device *osp;
1719 char *ospname = NULL;
1720 char *logname = NULL;
1725 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1726 OBD_ALLOC(ospname, MTI_NAME_MAXLEN);
1727 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1728 if (ospname == NULL || logname == NULL)
1729 GOTO(cleanup, rc = -ENOMEM);
1731 rc = server_name2fsname(lsi->lsi_svname, ospname, &tgt);
1733 CERROR("%s change fsname error: rc %d\n",
1734 lsi->lsi_svname, rc);
1737 sprintf(logname, "%s-client", ospname);
1739 rc = tgt_name2ospname(lsi->lsi_svname, ospname);
1741 CERROR("%s change ospname error: rc %d\n",
1742 lsi->lsi_svname, rc);
1746 osp = class_name2obd(ospname);
1748 GOTO(cleanup, rc = 0);
1752 GOTO(cleanup, rc = -ENOMEM);
1754 cfg->cfg_callback = client_osp_config_process;
1755 cfg->cfg_instance = sb;
1757 rc = lustre_process_log(sb, logname, cfg);
1760 if (ospname != NULL)
1761 OBD_FREE(ospname, MTI_NAME_MAXLEN);
1762 if (logname != NULL)
1763 OBD_FREE(logname, MTI_NAME_MAXLEN);
1770 /** Start server targets: MDTs and OSTs
1772 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1774 struct obd_device *obd;
1775 struct lustre_sb_info *lsi = s2lsi(sb);
1776 struct config_llog_instance cfg;
1778 struct lu_device *dev;
1782 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1785 /* If we're an MDT, make sure the global MDS is running */
1786 if (lsi->lsi_ldd->ldd_flags & LDD_F_SV_TYPE_MDT) {
1787 /* make sure the MDS is started */
1788 cfs_mutex_lock(&server_start_lock);
1789 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1791 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1792 /* FIXME pre-rename, should eventually be LUSTRE_MDS_NAME */
1794 LUSTRE_MDS_OBDNAME"_uuid",
1797 cfs_mutex_unlock(&server_start_lock);
1798 CERROR("failed to start MDS: %d\n", rc);
1802 cfs_mutex_unlock(&server_start_lock);
1806 /* If we're an OST, make sure the global OSS is running */
1808 /* make sure OSS is started */
1809 cfs_mutex_lock(&server_start_lock);
1810 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1812 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1814 LUSTRE_OSS_OBDNAME"_uuid",
1817 cfs_mutex_unlock(&server_start_lock);
1818 CERROR("failed to start OSS: %d\n", rc);
1822 cfs_mutex_unlock(&server_start_lock);
1825 /* Set the mgc fs to our server disk. This allows the MGC to
1826 * read and write configs locally, in case it can't talk to the MGS. */
1827 if (lsi->lsi_srv_mnt) {
1828 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1833 /* Register with MGS */
1834 rc = server_register_target(lsi);
1838 /* Let the target look up the mount using the target's name
1839 (we can't pass the sb or mnt through class_process_config.) */
1840 rc = server_register_mount(lsi->lsi_svname, sb, mnt);
1844 /* Start targets using the llog named for the target */
1845 memset(&cfg, 0, sizeof(cfg));
1846 cfg.cfg_callback = class_config_llog_handler;
1847 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1849 CERROR("failed to start server %s: %d\n",
1850 lsi->lsi_svname, rc);
1851 /* Do NOT call server_deregister_mount() here. This makes it
1852 * impossible to find mount later in cleanup time and leaves
1853 * @lsi and othder stuff leaked. -umka */
1857 obd = class_name2obd(lsi->lsi_svname);
1859 CERROR("no server named %s was started\n", lsi->lsi_svname);
1860 GOTO(out_mgc, rc = -ENXIO);
1863 if (IS_OST(lsi) || IS_MDT(lsi)) {
1864 rc = lustre_start_osp(sb);
1866 CERROR("%s: failed to start OSP: %d\n",
1867 lsi->lsi_svname, rc);
1872 server_notify_target(sb, obd);
1874 /* calculate recovery timeout, do it after lustre_process_log */
1875 server_calc_timeout(lsi, obd);
1877 /* log has been fully processed */
1878 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1880 /* log has been fully processed, let clients connect */
1881 dev = obd->obd_lu_dev;
1882 if (dev && dev->ld_ops->ldo_prepare) {
1883 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1885 struct lu_context session_ctx;
1887 lu_context_init(&session_ctx, LCT_SESSION);
1888 session_ctx.lc_thread = NULL;
1889 lu_context_enter(&session_ctx);
1890 env.le_ses = &session_ctx;
1892 dev->ld_ops->ldo_prepare(&env, NULL, dev);
1895 lu_context_exit(&session_ctx);
1896 lu_context_fini(&session_ctx);
1900 /* abort recovery only on the complete stack:
1901 * many devices can be involved */
1902 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1903 (OBP(obd, iocontrol))) {
1904 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1909 /* Release the mgc fs for others to use */
1910 if (lsi->lsi_srv_mnt)
1911 server_mgc_clear_fs(lsi->lsi_mgc);
1916 /***************** lustre superblock **************/
1918 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1920 struct lustre_sb_info *lsi;
1926 OBD_ALLOC_PTR(lsi->lsi_lmd);
1927 if (!lsi->lsi_lmd) {
1932 lsi->lsi_lmd->lmd_exclude_count = 0;
1933 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1934 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1935 s2lsi_nocast(sb) = lsi;
1936 /* we take 1 extra ref for our setup */
1937 cfs_atomic_set(&lsi->lsi_mounts, 1);
1939 /* Default umount style */
1940 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1945 static int lustre_free_lsi(struct super_block *sb)
1947 struct lustre_sb_info *lsi = s2lsi(sb);
1950 LASSERT(lsi != NULL);
1951 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1953 /* someone didn't call server_put_mount. */
1954 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1956 if (lsi->lsi_lmd != NULL) {
1957 if (lsi->lsi_lmd->lmd_dev != NULL)
1958 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1959 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1960 if (lsi->lsi_lmd->lmd_profile != NULL)
1961 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1962 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1963 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1964 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1965 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1966 if (lsi->lsi_lmd->lmd_opts != NULL)
1967 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1968 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1969 if (lsi->lsi_lmd->lmd_exclude_count)
1970 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1971 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1972 lsi->lsi_lmd->lmd_exclude_count);
1973 if (lsi->lsi_lmd->lmd_mgs != NULL)
1974 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
1975 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
1976 if (lsi->lsi_lmd->lmd_osd_type != NULL)
1977 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
1978 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
1979 if (lsi->lsi_lmd->lmd_params != NULL)
1980 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
1982 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1985 LASSERT(lsi->lsi_llsbi == NULL);
1986 OBD_FREE(lsi, sizeof(*lsi));
1987 s2lsi_nocast(sb) = NULL;
1992 /* The lsi has one reference for every server that is using the disk -
1993 e.g. MDT, MGS, and potentially MGC */
1994 static int lustre_put_lsi(struct super_block *sb)
1996 struct lustre_sb_info *lsi = s2lsi(sb);
1999 LASSERT(lsi != NULL);
2001 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
2002 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
2003 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
2004 obd_disconnect(lsi->lsi_osd_exp);
2005 /* wait till OSD is gone */
2006 obd_zombie_barrier();
2008 lustre_free_lsi(sb);
2014 static int lsi_prepare(struct lustre_sb_info *lsi)
2021 LASSERT(lsi->lsi_lmd);
2023 /* The server name is given as a mount line option */
2024 if (lsi->lsi_lmd->lmd_profile == NULL) {
2025 LCONSOLE_ERROR("Can't determine server name\n");
2029 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname))
2030 RETURN(-ENAMETOOLONG);
2032 strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile);
2034 /* Determine osd type */
2035 if (lsi->lsi_lmd->lmd_osd_type != NULL) {
2036 if (strlen(lsi->lsi_lmd->lmd_osd_type) >=
2037 sizeof(lsi->lsi_osd_type))
2038 RETURN(-ENAMETOOLONG);
2040 strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type);
2042 strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME);
2045 /* XXX: a temp. solution for components using fsfilt
2046 * to be removed in one of the subsequent patches */
2047 if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) {
2048 strcpy(lsi->lsi_fstype, "ldiskfs");
2050 strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type);
2053 /* Determine server type */
2054 rc = server_name2index(lsi->lsi_svname, &index, NULL);
2056 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
2057 /* Assume we're a bare MGS */
2059 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
2061 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
2066 lsi->lsi_flags |= rc;
2068 /* Add mount line flags that used to be in ldd:
2069 * writeconf, mgs, anything else?
2071 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
2072 LDD_F_WRITECONF : 0;
2073 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
2075 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
2076 LDD_F_SV_TYPE_MGS : 0;
2077 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
2078 LDD_F_NO_PRIMNODE : 0;
2083 /*************** server mount ******************/
2085 /** Start the shutdown of servers at umount.
2087 static void server_put_super(struct super_block *sb)
2089 struct lustre_sb_info *lsi = s2lsi(sb);
2090 struct obd_device *obd;
2091 char *tmpname, *extraname = NULL;
2093 int lsiflags = lsi->lsi_flags;
2096 LASSERT(IS_SERVER(lsi));
2098 tmpname_sz = strlen(lsi->lsi_svname) + 1;
2099 OBD_ALLOC(tmpname, tmpname_sz);
2100 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
2101 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
2102 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
2103 snprintf(tmpname, tmpname_sz, "MGS");
2105 /* disconnect the osp-on-ost first to drain off the inflight request */
2106 if (IS_OST(lsi) || IS_MDT(lsi)) {
2109 rc = lustre_disconnect_osp(sb);
2110 if (rc && rc != ETIMEDOUT)
2111 CERROR("%s: failed to disconnect osp-on-ost (rc=%d)!\n",
2115 /* Stop the target */
2116 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2117 (IS_MDT(lsi) || IS_OST(lsi))) {
2118 struct lustre_profile *lprof = NULL;
2120 /* tell the mgc to drop the config log */
2121 lustre_end_log(sb, lsi->lsi_svname, NULL);
2123 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
2124 If there are any setup/cleanup errors, save the lov
2125 name for safety cleanup later. */
2126 lprof = class_get_profile(lsi->lsi_svname);
2127 if (lprof && lprof->lp_dt) {
2128 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
2129 strcpy(extraname, lprof->lp_dt);
2132 obd = class_name2obd(lsi->lsi_svname);
2134 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
2135 if (lsi->lsi_flags & LSI_UMOUNT_FAILOVER)
2137 /* We can't seem to give an error return code
2138 * to .put_super, so we better make sure we clean up! */
2140 class_manual_cleanup(obd);
2142 CERROR("no obd %s\n", lsi->lsi_svname);
2143 server_deregister_mount(lsi->lsi_svname);
2147 /* If they wanted the mgs to stop separately from the mdt, they
2148 should have put it on a different device. */
2150 /* if MDS start with --nomgs, don't stop MGS then */
2151 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
2152 server_stop_mgs(sb);
2155 if (IS_OST(lsi) || IS_MDT(lsi)) {
2156 if (lustre_stop_osp(sb) < 0)
2157 CERROR("%s: Fail to stop osp-on-ost!\n", tmpname);
2160 /* Clean the mgc and sb */
2161 lustre_common_put_super(sb);
2163 /* wait till all in-progress cleanups are done
2164 * specifically we're interested in ofd cleanup
2166 obd_zombie_barrier();
2168 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
2169 until the target is really gone so that our type refcount check
2171 server_stop_servers(lsiflags);
2173 /* In case of startup or cleanup err, stop related obds */
2175 obd = class_name2obd(extraname);
2177 CWARN("Cleaning orphaned obd %s\n", extraname);
2179 class_manual_cleanup(obd);
2181 OBD_FREE(extraname, strlen(extraname) + 1);
2184 LCONSOLE_WARN("server umount %s complete\n", tmpname);
2185 OBD_FREE(tmpname, tmpname_sz);
2189 /** Called only for 'umount -f'
2191 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2192 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
2194 struct super_block *sb = vfsmnt->mnt_sb;
2196 static void server_umount_begin(struct super_block *sb)
2199 struct lustre_sb_info *lsi = s2lsi(sb);
2202 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2203 if (!(flags & MNT_FORCE)) {
2209 CDEBUG(D_MOUNT, "umount -f\n");
2210 /* umount = failover
2212 no third way to do non-force, non-failover */
2213 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
2217 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
2219 struct super_block *sb = dentry->d_sb;
2220 struct lustre_sb_info *lsi = s2lsi(sb);
2221 struct obd_statfs statfs;
2225 if (lsi->lsi_dt_dev) {
2226 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
2228 statfs_unpack(buf, &statfs);
2229 buf->f_type = sb->s_magic;
2235 buf->f_type = sb->s_magic;
2236 buf->f_bsize = sb->s_blocksize;
2242 buf->f_namelen = NAME_MAX;
2246 /** The operations we support directly on the superblock:
2247 * mount, umount, and df.
2249 static struct super_operations server_ops =
2251 .put_super = server_put_super,
2252 .umount_begin = server_umount_begin, /* umount -f */
2253 .statfs = server_statfs,
2256 #define log2(n) cfs_ffz(~(n))
2257 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
2259 static int server_fill_super_common(struct super_block *sb)
2261 struct inode *root = 0;
2264 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
2266 sb->s_blocksize = 4096;
2267 sb->s_blocksize_bits = log2(sb->s_blocksize);
2268 sb->s_magic = LUSTRE_SUPER_MAGIC;
2269 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
2270 sb->s_flags |= MS_RDONLY;
2271 sb->s_op = &server_ops;
2273 root = new_inode(sb);
2275 CERROR("Can't make root inode\n");
2279 /* returns -EIO for every operation */
2280 /* make_bad_inode(root); -- badness - can't umount */
2281 /* apparently we need to be a directory for the mount to finish */
2282 root->i_mode = S_IFDIR;
2284 sb->s_root = d_alloc_root(root);
2286 CERROR("Can't make root dentry\n");
2294 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
2296 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2297 struct obd_device *obd;
2298 struct dt_device_param p;
2304 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
2305 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
2307 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
2308 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
2309 strcat(lsi->lsi_osd_uuid, "_UUID");
2310 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
2312 obd = class_name2obd(lsi->lsi_osd_obdname);
2314 rc = lustre_start_simple(lsi->lsi_osd_obdname,
2316 lsi->lsi_osd_uuid, lmd->lmd_dev,
2317 flagstr, lsi->lsi_lmd->lmd_opts,
2321 obd = class_name2obd(lsi->lsi_osd_obdname);
2325 rc = obd_connect(NULL, &lsi->lsi_osd_exp, obd, &obd->obd_uuid, NULL, NULL);
2328 class_manual_cleanup(obd);
2329 lsi->lsi_dt_dev = NULL;
2332 /* XXX: to keep support old components relying on lsi_srv_mnt
2333 * we get this info from OSD just started */
2334 LASSERT(obd->obd_lu_dev);
2335 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
2336 LASSERT(lsi->lsi_dt_dev);
2338 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
2340 lsi->lsi_srv_mnt = p.ddp_mnt;
2346 /** Fill in the superblock info for a Lustre server.
2347 * Mount the device with the correct options.
2348 * Read the on-disk config file.
2349 * Start the services.
2351 static int server_fill_super(struct super_block *sb)
2353 struct lustre_sb_info *lsi = s2lsi(sb);
2357 rc = lsi_prepare(lsi);
2361 /* Start low level OSD */
2362 rc = osd_start(lsi, sb->s_flags);
2364 CERROR("Unable to start osd on %s: %d\n",
2365 lsi->lsi_lmd->lmd_dev, rc);
2370 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
2371 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
2373 if (class_name2obd(lsi->lsi_svname)) {
2374 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
2375 "running. Double-mount may have compromised"
2376 " the disk journal.\n",
2382 /* Start MGS before MGC */
2383 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
2384 rc = server_start_mgs(sb);
2389 /* Start MGC before servers */
2390 rc = lustre_start_mgc(sb);
2394 /* Set up all obd devices for service */
2395 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2396 (IS_OST(lsi) || IS_MDT(lsi))) {
2397 rc = server_start_targets(sb, lsi->lsi_srv_mnt);
2399 CERROR("Unable to start targets: %d\n", rc);
2402 /* FIXME overmount client here,
2403 or can we just start a client log and client_fill_super on this sb?
2404 We need to make sure server_put_super gets called too - ll_put_super
2405 calls lustre_common_put_super; check there for LSI_SERVER flag,
2407 Probably should start client from new thread so we can return.
2408 Client will not finish until all servers are connected.
2409 Note - MGS-only server does NOT get a client, since there is no
2410 lustre fs associated - the MGS is for all lustre fs's */
2413 rc = server_fill_super_common(sb);
2419 /* We jump here in case of failure while starting targets or MGS.
2420 * In this case we can't just put @mnt and have to do real cleanup
2421 * with stoping targets, etc. */
2422 server_put_super(sb);
2427 * Calculate timeout value for a target.
2429 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
2431 struct lustre_mount_data *lmd;
2435 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
2436 int min = OBD_RECOVERY_TIME_MIN;
2438 LASSERT(IS_SERVER(lsi));
2442 soft = lmd->lmd_recovery_time_soft;
2443 hard = lmd->lmd_recovery_time_hard;
2444 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
2445 obd->obd_no_ir = !has_ir;
2449 soft = OBD_RECOVERY_TIME_SOFT;
2451 hard = OBD_RECOVERY_TIME_HARD;
2453 /* target may have ir_factor configured. */
2454 factor = OBD_IR_FACTOR_DEFAULT;
2455 if (obd->obd_recovery_ir_factor)
2456 factor = obd->obd_recovery_ir_factor;
2459 int new_soft = soft;
2460 int new_hard = hard;
2462 /* adjust timeout value by imperative recovery */
2464 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
2465 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
2467 /* make sure the timeout is not too short */
2468 new_soft = max(min, new_soft);
2469 new_hard = max(new_soft, new_hard);
2471 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
2472 "window shrunk from %d-%d down to %d-%d\n",
2473 obd->obd_name, soft, hard, new_soft, new_hard);
2480 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
2481 obd->obd_recovery_time_hard = hard;
2482 obd->obd_recovery_ir_factor = factor;
2484 EXPORT_SYMBOL(server_calc_timeout);
2486 /*************** mount common betweeen server and client ***************/
2489 int lustre_common_put_super(struct super_block *sb)
2494 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
2496 /* Drop a ref to the MGC */
2497 rc = lustre_stop_mgc(sb);
2498 if (rc && (rc != -ENOENT)) {
2500 CERROR("Can't stop MGC: %d\n", rc);
2503 /* BUSY just means that there's some other obd that
2504 needs the mgc. Let him clean it up. */
2505 CDEBUG(D_MOUNT, "MGC still in use\n");
2507 /* Drop a ref to the mounted disk */
2512 EXPORT_SYMBOL(lustre_common_put_super);
2514 static void lmd_print(struct lustre_mount_data *lmd)
2518 PRINT_CMD(PRINT_MASK, " mount data:\n");
2519 if (lmd_is_client(lmd))
2520 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
2521 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
2522 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
2525 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
2527 if (lmd->lmd_recovery_time_soft)
2528 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
2529 lmd->lmd_recovery_time_soft);
2531 if (lmd->lmd_recovery_time_hard)
2532 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
2533 lmd->lmd_recovery_time_hard);
2535 for (i = 0; i < lmd->lmd_exclude_count; i++) {
2536 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
2537 lmd->lmd_exclude[i]);
2541 /* Is this server on the exclusion list */
2542 int lustre_check_exclusion(struct super_block *sb, char *svname)
2544 struct lustre_sb_info *lsi = s2lsi(sb);
2545 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2550 rc = server_name2index(svname, &index, NULL);
2551 if (rc != LDD_F_SV_TYPE_OST)
2552 /* Only exclude OSTs */
2555 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
2556 index, lmd->lmd_exclude_count, lmd->lmd_dev);
2558 for(i = 0; i < lmd->lmd_exclude_count; i++) {
2559 if (index == lmd->lmd_exclude[i]) {
2560 CWARN("Excluding %s (on exclusion list)\n", svname);
2567 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
2568 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
2570 char *s1 = ptr, *s2;
2571 __u32 index, *exclude_list;
2575 /* The shortest an ost name can be is 8 chars: -OST0000.
2576 We don't actually know the fsname at this time, so in fact
2577 a user could specify any fsname. */
2578 devmax = strlen(ptr) / 8 + 1;
2580 /* temp storage until we figure out how many we have */
2581 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
2585 /* we enter this fn pointing at the '=' */
2586 while (*s1 && *s1 != ' ' && *s1 != ',') {
2588 rc = server_name2index(s1, &index, &s2);
2590 CERROR("Can't parse server name '%s'\n", s1);
2593 if (rc == LDD_F_SV_TYPE_OST)
2594 exclude_list[lmd->lmd_exclude_count++] = index;
2596 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
2598 /* now we are pointing at ':' (next exclude)
2599 or ',' (end of excludes) */
2600 if (lmd->lmd_exclude_count >= devmax)
2603 if (rc >= 0) /* non-err */
2606 if (lmd->lmd_exclude_count) {
2607 /* permanent, freed in lustre_free_lsi */
2608 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
2609 lmd->lmd_exclude_count);
2610 if (lmd->lmd_exclude) {
2611 memcpy(lmd->lmd_exclude, exclude_list,
2612 sizeof(index) * lmd->lmd_exclude_count);
2615 lmd->lmd_exclude_count = 0;
2618 OBD_FREE(exclude_list, sizeof(index) * devmax);
2622 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
2627 if (lmd->lmd_mgssec != NULL) {
2628 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
2629 lmd->lmd_mgssec = NULL;
2632 tail = strchr(ptr, ',');
2634 length = strlen(ptr);
2636 length = tail - ptr;
2638 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
2639 if (lmd->lmd_mgssec == NULL)
2642 memcpy(lmd->lmd_mgssec, ptr, length);
2643 lmd->lmd_mgssec[length] = '\0';
2647 static int lmd_parse_string(char **handle, char *ptr)
2652 if ((handle == NULL) || (ptr == NULL))
2655 if (*handle != NULL) {
2656 OBD_FREE(*handle, strlen(*handle) + 1);
2660 tail = strchr(ptr, ',');
2662 length = strlen(ptr);
2664 length = tail - ptr;
2666 OBD_ALLOC(*handle, length + 1);
2667 if (*handle == NULL)
2670 memcpy(*handle, ptr, length);
2671 (*handle)[length] = '\0';
2676 /* Collect multiple values for mgsnid specifiers */
2677 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
2685 /* Find end of nidlist */
2686 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
2687 length = tail - *ptr;
2689 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
2693 if (lmd->lmd_mgs != NULL)
2694 oldlen = strlen(lmd->lmd_mgs) + 1;
2696 OBD_ALLOC(mgsnid, oldlen + length + 1);
2700 if (lmd->lmd_mgs != NULL) {
2701 /* Multiple mgsnid= are taken to mean failover locations */
2702 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
2703 mgsnid[oldlen - 1] = ':';
2704 OBD_FREE(lmd->lmd_mgs, oldlen);
2706 memcpy(mgsnid + oldlen, *ptr, length);
2707 mgsnid[oldlen + length] = '\0';
2708 lmd->lmd_mgs = mgsnid;
2714 /** Parse mount line options
2715 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
2716 * dev is passed as device=uml1:/lustre by mount.lustre
2718 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
2720 char *s1, *s2, *devname = NULL;
2721 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
2727 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
2728 "/sbin/mount.lustre is installed.\n");
2732 /* Options should be a string - try to detect old lmd data */
2733 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
2734 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
2735 "/sbin/mount.lustre. Please install "
2736 "version %s\n", LUSTRE_VERSION_STRING);
2739 lmd->lmd_magic = LMD_MAGIC;
2741 OBD_ALLOC(lmd->lmd_params, 4096);
2742 if (lmd->lmd_params == NULL)
2744 lmd->lmd_params[0] = '\0';
2746 /* Set default flags here */
2751 int time_min = OBD_RECOVERY_TIME_MIN;
2753 /* Skip whitespace and extra commas */
2754 while (*s1 == ' ' || *s1 == ',')
2757 /* Client options are parsed in ll_options: eg. flock,
2760 /* Parse non-ldiskfs options here. Rather than modifying
2761 ldiskfs, we just zero these out here */
2762 if (strncmp(s1, "abort_recov", 11) == 0) {
2763 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
2765 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
2766 lmd->lmd_recovery_time_soft = max_t(int,
2767 simple_strtoul(s1 + 19, NULL, 10), time_min);
2769 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
2770 lmd->lmd_recovery_time_hard = max_t(int,
2771 simple_strtoul(s1 + 19, NULL, 10), time_min);
2773 } else if (strncmp(s1, "noir", 4) == 0) {
2774 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
2776 } else if (strncmp(s1, "nosvc", 5) == 0) {
2777 lmd->lmd_flags |= LMD_FLG_NOSVC;
2779 } else if (strncmp(s1, "nomgs", 5) == 0) {
2780 lmd->lmd_flags |= LMD_FLG_NOMGS;
2782 } else if (strncmp(s1, "noscrub", 7) == 0) {
2783 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
2785 } else if (strncmp(s1, PARAM_MGSNODE,
2786 sizeof(PARAM_MGSNODE) - 1) == 0) {
2787 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
2788 /* Assume the next mount opt is the first
2789 invalid nid we get to. */
2790 rc = lmd_parse_mgs(lmd, &s2);
2794 } else if (strncmp(s1, "writeconf", 9) == 0) {
2795 lmd->lmd_flags |= LMD_FLG_WRITECONF;
2797 } else if (strncmp(s1, "virgin", 6) == 0) {
2798 lmd->lmd_flags |= LMD_FLG_VIRGIN;
2800 } else if (strncmp(s1, "noprimnode", 10) == 0) {
2801 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
2803 } else if (strncmp(s1, "mgssec=", 7) == 0) {
2804 rc = lmd_parse_mgssec(lmd, s1 + 7);
2808 /* ost exclusion list */
2809 } else if (strncmp(s1, "exclude=", 8) == 0) {
2810 rc = lmd_make_exclusion(lmd, s1 + 7);
2814 } else if (strncmp(s1, "mgs", 3) == 0) {
2816 lmd->lmd_flags |= LMD_FLG_MGS;
2818 } else if (strncmp(s1, "svname=", 7) == 0) {
2819 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
2823 } else if (strncmp(s1, "param=", 6) == 0) {
2825 char *tail = strchr(s1 + 6, ',');
2827 length = strlen(s1);
2831 strncat(lmd->lmd_params, s1 + 6, length);
2832 strcat(lmd->lmd_params, " ");
2834 } else if (strncmp(s1, "osd=", 4) == 0) {
2835 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
2840 /* Linux 2.4 doesn't pass the device, so we stuck it at the
2841 end of the options. */
2842 else if (strncmp(s1, "device=", 7) == 0) {
2844 /* terminate options right before device. device
2845 must be the last one. */
2851 s2 = strchr(s1, ',');
2859 memmove(s1, s2, strlen(s2) + 1);
2865 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2866 "(need mount option 'device=...')\n");
2870 s1 = strstr(devname, ":/");
2873 lmd->lmd_flags |= LMD_FLG_CLIENT;
2874 /* Remove leading /s from fsname */
2875 while (*++s1 == '/') ;
2876 /* Freed in lustre_free_lsi */
2877 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2878 if (!lmd->lmd_profile)
2880 sprintf(lmd->lmd_profile, "%s-client", s1);
2883 /* Freed in lustre_free_lsi */
2884 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2887 strcpy(lmd->lmd_dev, devname);
2889 /* Save mount options */
2890 s1 = options + strlen(options) - 1;
2891 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2893 if (*options != 0) {
2894 /* Freed in lustre_free_lsi */
2895 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2898 strcpy(lmd->lmd_opts, options);
2902 lmd->lmd_magic = LMD_MAGIC;
2907 CERROR("Bad mount options %s\n", options);
2911 struct lustre_mount_data2 {
2913 struct vfsmount *lmd2_mnt;
2916 /** This is the entry point for the mount call into Lustre.
2917 * This is called when a server or client is mounted,
2918 * and this is where we start setting things up.
2919 * @param data Mount options (e.g. -o flock,abort_recov)
2921 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2923 struct lustre_mount_data *lmd;
2924 struct lustre_mount_data2 *lmd2 = data;
2925 struct lustre_sb_info *lsi;
2929 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2931 lsi = lustre_init_lsi(sb);
2937 * Disable lockdep during mount, because mount locking patterns are
2943 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
2945 obd_zombie_barrier();
2947 /* Figure out the lmd from the mount options */
2948 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
2950 GOTO(out, rc = -EINVAL);
2953 if (lmd_is_client(lmd)) {
2954 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2955 if (!client_fill_super) {
2956 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2957 "client mount! Is the 'lustre' "
2958 "module loaded?\n");
2962 rc = lustre_start_mgc(sb);
2967 /* Connect and start */
2968 /* (should always be ll_fill_super) */
2969 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
2970 /* c_f_s will call lustre_common_put_super on failure */
2973 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2974 rc = server_fill_super(sb);
2975 /* s_f_s calls lustre_start_mgc after the mount because we need
2976 the MGS nids which are stored on disk. Plus, we may
2977 need to start the MGS first. */
2978 /* s_f_s will call server_put_super on failure */
2981 /* If error happens in fill_super() call, @lsi will be killed there.
2982 * This is why we do not put it here. */
2986 CERROR("Unable to mount %s (%d)\n",
2987 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2989 CDEBUG(D_SUPER, "Mount %s complete\n",
2997 /* We can't call ll_fill_super by name because it lives in a module that
2998 must be loaded after this one. */
2999 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
3000 struct vfsmount *mnt))
3002 client_fill_super = cfs;
3004 EXPORT_SYMBOL(lustre_register_client_fill_super);
3006 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
3008 kill_super_cb = cfs;
3010 EXPORT_SYMBOL(lustre_register_kill_super_cb);
3012 /***************** FS registration ******************/
3013 #ifdef HAVE_FSTYPE_MOUNT
3014 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
3015 const char *devname, void *data)
3017 struct lustre_mount_data2 lmd2 = { data, NULL };
3019 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
3022 int lustre_get_sb(struct file_system_type *fs_type, int flags,
3023 const char *devname, void * data, struct vfsmount *mnt)
3025 struct lustre_mount_data2 lmd2 = { data, mnt };
3027 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
3031 void lustre_kill_super(struct super_block *sb)
3033 struct lustre_sb_info *lsi = s2lsi(sb);
3035 if (kill_super_cb && lsi && !IS_SERVER(lsi))
3036 (*kill_super_cb)(sb);
3038 kill_anon_super(sb);
3041 /** Register the "lustre" fs type
3043 struct file_system_type lustre_fs_type = {
3044 .owner = THIS_MODULE,
3046 #ifdef HAVE_FSTYPE_MOUNT
3047 .mount = lustre_mount,
3049 .get_sb = lustre_get_sb,
3051 .kill_sb = lustre_kill_super,
3052 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
3053 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
3056 int lustre_register_fs(void)
3058 return register_filesystem(&lustre_fs_type);
3061 int lustre_unregister_fs(void)
3063 return unregister_filesystem(&lustre_fs_type);
3066 EXPORT_SYMBOL(server_mti_print);