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 a lwp name
907 * (fsname-MDT0000-lwp-OSTxxxx)
909 int tgt_name2lwpname(char *svname, char *lwpname)
915 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
919 rc = server_name2fsname(svname, fsname, &tgt);
921 CERROR("%s: failed to get fsname from svname. %d\n",
926 if (*tgt != '-' && *tgt != ':') {
927 CERROR("%s: invalid 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(lwpname, "%s-MDT0000-%s-%s", fsname, LUSTRE_LWP_NAME, tgt);
939 OBD_FREE(fsname, MTI_NAME_MAXLEN);
942 EXPORT_SYMBOL(tgt_name2lwpname);
944 static CFS_LIST_HEAD(lwp_register_list);
945 DEFINE_MUTEX(lwp_register_list_lock);
947 int lustre_register_lwp_item(char *lwpname, struct obd_export **exp,
948 register_lwp_cb cb_func, void *cb_data)
950 struct obd_device *lwp;
951 struct lwp_register_item *lri;
954 LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n",
956 LASSERT(exp != NULL && *exp == NULL);
962 mutex_lock(&lwp_register_list_lock);
964 lwp = class_name2obd(lwpname);
965 if (lwp != NULL && lwp->obd_set_up == 1) {
966 struct obd_uuid *uuid;
970 mutex_unlock(&lwp_register_list_lock);
974 memcpy(uuid->uuid, lwpname, strlen(lwpname));
975 *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid);
979 memcpy(lri->lri_name, lwpname, strlen(lwpname));
981 lri->lri_cb_func = cb_func;
982 lri->lri_cb_data = cb_data;
983 CFS_INIT_LIST_HEAD(&lri->lri_list);
984 cfs_list_add(&lri->lri_list, &lwp_register_list);
986 if (*exp != NULL && cb_func != NULL)
989 mutex_unlock(&lwp_register_list_lock);
992 EXPORT_SYMBOL(lustre_register_lwp_item);
994 void lustre_deregister_lwp_item(struct obd_export **exp)
996 struct lwp_register_item *lri, *tmp;
998 mutex_lock(&lwp_register_list_lock);
999 cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
1000 if (exp == lri->lri_exp) {
1002 class_export_put(*exp);
1003 cfs_list_del(&lri->lri_list);
1008 mutex_unlock(&lwp_register_list_lock);
1010 EXPORT_SYMBOL(lustre_deregister_lwp_item);
1012 static void lustre_notify_lwp_list(struct obd_export *exp)
1014 struct lwp_register_item *lri, *tmp;
1015 LASSERT(exp != NULL);
1017 mutex_lock(&lwp_register_list_lock);
1018 cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
1019 if (strcmp(exp->exp_obd->obd_name, lri->lri_name))
1021 if (*lri->lri_exp != NULL)
1023 *lri->lri_exp = class_export_get(exp);
1024 if (lri->lri_cb_func != NULL)
1025 lri->lri_cb_func(lri->lri_cb_data);
1027 mutex_unlock(&lwp_register_list_lock);
1030 static int lustre_lwp_connect(struct obd_device *lwp)
1033 struct lu_context session_ctx;
1034 struct obd_export *exp;
1035 struct obd_uuid *uuid = NULL;
1036 struct obd_connect_data *data = NULL;
1040 /* log has been fully processed, let clients connect */
1041 rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags);
1045 lu_context_init(&session_ctx, LCT_SESSION);
1046 session_ctx.lc_thread = NULL;
1047 lu_context_enter(&session_ctx);
1048 env.le_ses = &session_ctx;
1050 OBD_ALLOC_PTR(data);
1052 GOTO(out, rc = -ENOMEM);
1054 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
1055 data->ocd_version = LUSTRE_VERSION_CODE;
1056 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
1057 OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE |
1058 OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE |
1059 OBD_CONNECT_LIGHTWEIGHT |
1060 OBD_CONNECT_PINGLESS;
1061 OBD_ALLOC_PTR(uuid);
1063 GOTO(out, rc = -ENOMEM);
1065 if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) {
1066 CERROR("%s: Too long lwp name %s, max_size is %d\n",
1067 lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid));
1068 GOTO(out, rc = -EINVAL);
1071 /* Use lwp name as the uuid, so we find the export by lwp name later */
1072 memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name));
1073 rc = obd_connect(&env, &exp, lwp, uuid, data, NULL);
1075 CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc);
1077 lustre_notify_lwp_list(exp);
1086 lu_context_exit(&session_ctx);
1087 lu_context_fini(&session_ctx);
1093 * lwp is used by slaves (Non-MDT0 targets) to manage the connection
1096 static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi)
1098 struct obd_connect_data *data = NULL;
1099 struct obd_device *obd;
1100 char *lwpname = NULL;
1101 char *lwpuuid = NULL;
1105 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1108 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
1112 OBD_ALLOC(lwpname, MTI_NAME_MAXLEN);
1113 if (lwpname == NULL)
1114 GOTO(out, rc = -ENOMEM);
1116 rc = tgt_name2lwpname(lsi->lsi_svname, lwpname);
1118 CERROR("%s: failed to generate lwp name. %d\n",
1119 lsi->lsi_svname, rc);
1123 OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN);
1124 if (lwpuuid == NULL)
1125 GOTO(out, rc = -ENOMEM);
1127 sprintf(lwpuuid, "%s_UUID", lwpname);
1128 rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME,
1129 lwpuuid, lustre_cfg_string(lcfg, 1),
1132 CERROR("%s: setup up failed: rc %d\n", lwpname, rc);
1136 obd = class_name2obd(lwpname);
1137 LASSERT(obd != NULL);
1139 rc = lustre_lwp_connect(obd);
1141 CERROR("%s: connect failed: rc = %d\n", lwpname, rc);
1145 if (lwpname != NULL)
1146 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
1147 if (lwpuuid != NULL)
1148 OBD_FREE(lwpuuid, MTI_NAME_MAXLEN);
1153 /* the caller is responsible for memory free */
1154 static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi,
1155 char **lwpname, char **logname)
1157 struct obd_device *lwp;
1161 LASSERT(lwpname != NULL);
1162 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
1164 OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN);
1165 if (*lwpname == NULL)
1166 RETURN(ERR_PTR(-ENOMEM));
1168 if (logname != NULL) {
1169 OBD_ALLOC(*logname, MTI_NAME_MAXLEN);
1170 if (*logname == NULL)
1171 GOTO(out, rc = -ENOMEM);
1172 rc = server_name2fsname(lsi->lsi_svname, *lwpname, NULL);
1174 CERROR("%s: failed to get fsname from svname. %d\n",
1175 lsi->lsi_svname, rc);
1176 GOTO(out, rc = -EINVAL);
1178 sprintf(*logname, "%s-client", *lwpname);
1181 rc = tgt_name2lwpname(lsi->lsi_svname, *lwpname);
1183 CERROR("%s: failed to generate lwp name. %d\n",
1184 lsi->lsi_svname, rc);
1185 GOTO(out, rc = -EINVAL);
1188 lwp = class_name2obd(*lwpname);
1192 if (*lwpname != NULL) {
1193 OBD_FREE(*lwpname, MTI_NAME_MAXLEN);
1196 if (logname != NULL && *logname != NULL) {
1197 OBD_FREE(*logname, MTI_NAME_MAXLEN);
1203 RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT));
1206 static int lustre_lwp_add_conn(struct lustre_cfg *cfg,
1207 struct lustre_sb_info *lsi)
1209 struct lustre_cfg_bufs *bufs = NULL;
1210 struct lustre_cfg *lcfg = NULL;
1211 char *lwpname = NULL;
1212 struct obd_device *lwp;
1216 lwp = lustre_find_lwp(lsi, &lwpname, NULL);
1218 CERROR("%s: can't find lwp device.\n", lsi->lsi_svname);
1219 GOTO(out, rc = PTR_ERR(lwp));
1221 LASSERT(lwpname != NULL);
1223 OBD_ALLOC_PTR(bufs);
1225 GOTO(out, rc = -ENOMEM);
1227 lustre_cfg_bufs_reset(bufs, lwpname);
1228 lustre_cfg_bufs_set_string(bufs, 1,
1229 lustre_cfg_string(cfg, 1));
1231 lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
1233 rc = class_add_conn(lwp, lcfg);
1235 CERROR("%s: can't add conn: rc = %d\n", lwpname, rc);
1241 lustre_cfg_free(lcfg);
1242 if (lwpname != NULL)
1243 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
1248 * Retrieve MDT nids from the client log, then start the lwp device.
1249 * there are only two scenarios which would include mdt nid.
1251 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx-
1252 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
1253 * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID
1254 * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp
1255 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
1256 * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp
1257 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx
1258 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx-
1260 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1261 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
1262 * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp
1263 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
1265 static int client_lwp_config_process(const struct lu_env *env,
1266 struct llog_handle *handle,
1267 struct llog_rec_hdr *rec, void *data)
1269 struct config_llog_instance *clli = data;
1270 int cfg_len = rec->lrh_len;
1271 char *cfg_buf = (char *) (rec + 1);
1272 struct lustre_cfg *lcfg = NULL;
1273 struct lustre_sb_info *lsi;
1274 int rc = 0, swab = 0;
1277 if (rec->lrh_type != OBD_CFG_REC) {
1278 CERROR("Unknown llog record type %#x encountered\n",
1283 LASSERT(clli->cfg_sb != NULL);
1284 lsi = s2lsi(clli->cfg_sb);
1286 lcfg = (struct lustre_cfg *)cfg_buf;
1287 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1288 lustre_swab_lustre_cfg(lcfg);
1292 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1296 switch (lcfg->lcfg_command) {
1298 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1300 lustre_swab_cfg_marker(marker, swab,
1301 LUSTRE_CFG_BUFLEN(lcfg, 1));
1302 if (marker->cm_flags & CM_SKIP ||
1303 marker->cm_flags & CM_EXCLUDE)
1306 if (!tgt_is_mdt0(marker->cm_tgtname))
1309 if(!strncmp(marker->cm_comment, "add mdc", 7) ||
1310 !strncmp(marker->cm_comment, "add failnid", 11)) {
1311 if (marker->cm_flags & CM_START) {
1312 clli->cfg_flags = CFG_F_MARKER;
1313 /* This hack is to differentiate the
1314 * ADD_UUID is come from "add mdc" record
1315 * or from "add failnid" record. */
1316 if (!strncmp(marker->cm_comment,
1318 clli->cfg_flags |= CFG_F_SKIP;
1319 } else if (marker->cm_flags & CM_END) {
1320 clli->cfg_flags = 0;
1325 case LCFG_ADD_UUID: {
1326 if (clli->cfg_flags == CFG_F_MARKER) {
1327 rc = lustre_lwp_setup(lcfg, lsi);
1328 /* XXX: process only the first nid as
1329 * we don't need another instance of lwp */
1330 clli->cfg_flags |= CFG_F_SKIP;
1331 } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
1332 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
1335 CERROR("%s: Fail to add uuid, rc:%d\n",
1336 lsi->lsi_svname, rc);
1340 case LCFG_ADD_CONN: {
1341 if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0)))
1342 rc = lustre_lwp_add_conn(lcfg, lsi);
1352 static int lustre_disconnect_lwp(struct super_block *sb)
1354 struct lustre_sb_info *lsi = s2lsi(sb);
1355 struct obd_device *lwp;
1356 char *lwpname = NULL;
1357 char *logname = NULL;
1358 struct lustre_cfg *lcfg = NULL;
1359 struct lustre_cfg_bufs *bufs = NULL;
1360 struct config_llog_instance *cfg = NULL;
1364 lwp = lustre_find_lwp(lsi, &lwpname, &logname);
1365 if (IS_ERR(lwp) && PTR_ERR(lwp) != -ENOENT)
1366 GOTO(out, rc = PTR_ERR(lwp));
1368 LASSERT(lwpname != NULL);
1369 LASSERT(logname != NULL);
1373 GOTO(out, rc = -ENOMEM);
1376 cfg->cfg_instance = sb;
1377 rc = lustre_end_log(sb, logname, cfg);
1379 CERROR("%s: Can't end config log %s.\n", lwpname, logname);
1383 if (PTR_ERR(lwp) == -ENOENT) {
1384 CDEBUG(D_CONFIG, "%s: lwp device wasn't started.\n",
1389 OBD_ALLOC_PTR(bufs);
1391 GOTO(out, rc = -ENOMEM);
1393 lustre_cfg_bufs_reset(bufs, lwp->obd_name);
1394 lustre_cfg_bufs_set_string(bufs, 1, NULL);
1395 lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
1397 GOTO(out, rc = -ENOMEM);
1399 /* Disconnect import first. NULL is passed for the '@env', since
1400 * it will not be used. */
1401 rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL, lwp->obd_lu_dev,
1405 lustre_cfg_free(lcfg);
1411 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
1413 OBD_FREE(logname, MTI_NAME_MAXLEN);
1418 * Stop the lwp for an OST/MDT target.
1420 static int lustre_stop_lwp(struct super_block *sb)
1422 struct lustre_sb_info *lsi = s2lsi(sb);
1423 struct obd_device *lwp = NULL;
1424 char *lwpname = NULL;
1428 lwp = lustre_find_lwp(lsi, &lwpname, NULL);
1430 CDEBUG(PTR_ERR(lwp) == -ENOENT ? D_CONFIG : D_ERROR,
1431 "%s: lwp wasn't started.\n", lsi->lsi_svname);
1436 rc = class_manual_cleanup(lwp);
1439 if (lwpname != NULL)
1440 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
1445 * Start the lwp(fsname-MDT0000-lwp-OSTxxxx) for an OST or MDT target,
1446 * which would be used to establish connection from OST to MDT0.
1448 static int lustre_start_lwp(struct super_block *sb)
1450 struct lustre_sb_info *lsi = s2lsi(sb);
1451 struct config_llog_instance *cfg = NULL;
1452 struct obd_device *lwp;
1453 char *lwpname = NULL;
1454 char *logname = NULL;
1458 lwp = lustre_find_lwp(lsi, &lwpname, &logname);
1460 /* the lwp device already stared */
1461 if (lwp && !IS_ERR(lwp))
1464 if (PTR_ERR(lwp) != -ENOENT)
1465 GOTO(out, rc = PTR_ERR(lwp));
1467 LASSERT(lwpname != NULL);
1468 LASSERT(logname != NULL);
1472 GOTO(out, rc = -ENOMEM);
1474 cfg->cfg_callback = client_lwp_config_process;
1475 cfg->cfg_instance = sb;
1477 rc = lustre_process_log(sb, logname, cfg);
1479 if (lwpname != NULL)
1480 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
1481 if (logname != NULL)
1482 OBD_FREE(logname, MTI_NAME_MAXLEN);
1488 DEFINE_MUTEX(server_start_lock);
1490 /* Stop MDS/OSS if nobody is using them */
1491 static int server_stop_servers(int lsiflags)
1493 struct obd_device *obd = NULL;
1494 struct obd_type *type = NULL;
1498 mutex_lock(&server_start_lock);
1500 /* Either an MDT or an OST or neither */
1501 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1502 if ((lsiflags & LDD_F_SV_TYPE_MDT) &&
1503 (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) {
1504 type = class_search_type(LUSTRE_MDT_NAME);
1506 /* if this was an OST, and there are no more OST's, clean up the OSS */
1507 if ((lsiflags & LDD_F_SV_TYPE_OST) &&
1508 (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) {
1509 type = class_search_type(LUSTRE_OST_NAME);
1512 if (obd && (!type || !type->typ_refcnt)) {
1515 /* obd_fail doesn't mean much on a server obd */
1516 err = class_manual_cleanup(obd);
1521 mutex_unlock(&server_start_lock);
1526 int server_mti_print(char *title, struct mgs_target_info *mti)
1528 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1529 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1530 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1531 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1532 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1533 mti->mti_config_ver, mti->mti_flags);
1538 * Get service name (svname) from string
1540 * if endptr isn't NULL it is set to end of fsname *
1542 int server_name2svname(char *label, char *svname, char **endptr, size_t svsize)
1547 /* We use server_name2fsname() just for parsing */
1548 rc = server_name2fsname(label, NULL, &dash);
1555 if (strlcpy(svname, dash + 1, svsize) >= svsize)
1560 EXPORT_SYMBOL(server_name2svname);
1563 /* Get the index from the obd name.
1564 rc = server type, or
1566 if endptr isn't NULL it is set to end of name */
1567 int server_name2index(char *svname, __u32 *idx, char **endptr)
1569 unsigned long index;
1573 /* We use server_name2fsname() just for parsing */
1574 rc = server_name2fsname(svname, NULL, &dash);
1583 if (strncmp(dash, "MDT", 3) == 0)
1584 rc = LDD_F_SV_TYPE_MDT;
1585 else if (strncmp(dash, "OST", 3) == 0)
1586 rc = LDD_F_SV_TYPE_OST;
1592 if (strcmp(dash, "all") == 0)
1593 return rc | LDD_F_SV_ALL;
1595 index = simple_strtoul(dash, endptr, 16);
1600 EXPORT_SYMBOL(server_name2index);
1602 /* Generate data for registration */
1603 static int server_lsi2mti(struct lustre_sb_info *lsi,
1604 struct mgs_target_info *mti)
1606 lnet_process_id_t id;
1611 if (!IS_SERVER(lsi))
1614 if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname))
1615 >= sizeof(mti->mti_svname))
1618 mti->mti_nid_count = 0;
1619 while (LNetGetId(i++, &id) != -ENOENT) {
1620 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1623 /* server use --servicenode param, only allow specified
1624 * nids be registered */
1625 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1626 class_match_nid(lsi->lsi_lmd->lmd_params,
1627 PARAM_FAILNODE, id.nid) < 1)
1630 /* match specified network */
1631 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1632 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1635 mti->mti_nids[mti->mti_nid_count] = id.nid;
1636 mti->mti_nid_count++;
1637 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1638 CWARN("Only using first %d nids for %s\n",
1639 mti->mti_nid_count, mti->mti_svname);
1644 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1645 mti->mti_config_ver = 0;
1647 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1651 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1654 /* Orion requires index to be set */
1655 LASSERT(!(rc & LDD_F_NEED_INDEX));
1656 /* keep only LDD flags */
1657 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1658 if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
1659 mti->mti_flags |= LDD_F_UPDATE;
1660 cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1661 sizeof(mti->mti_params));
1662 if (cplen >= sizeof(mti->mti_params))
1667 /* Register an old or new target with the MGS. If needed MGS will construct
1668 startup logs and assign index */
1669 static int server_register_target(struct lustre_sb_info *lsi)
1671 struct obd_device *mgc = lsi->lsi_mgc;
1672 struct mgs_target_info *mti = NULL;
1679 if (!IS_SERVER(lsi))
1686 rc = server_lsi2mti(lsi, mti);
1690 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1691 mti->mti_svname, mti->mti_fsname,
1692 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1695 /* if write_conf is true, the registration must succeed */
1696 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1697 mti->mti_flags |= LDD_F_OPC_REG;
1699 /* Register the target */
1700 /* FIXME use mgc_process_config instead */
1701 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1702 sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET,
1703 sizeof(*mti), mti, NULL);
1705 if (mti->mti_flags & LDD_F_ERROR) {
1706 LCONSOLE_ERROR_MSG(0x160,
1707 "The MGS is refusing to allow this "
1708 "server (%s) to start. Please see messages"
1709 " on the MGS node.\n", lsi->lsi_svname);
1710 } else if (writeconf) {
1711 LCONSOLE_ERROR_MSG(0x15f,
1712 "Communication to the MGS return error %d. "
1713 "Is the MGS running?\n", rc);
1715 CERROR("Cannot talk to the MGS: %d, not fatal\n", rc);
1716 /* reset the error code for non-fatal error. */
1729 * Notify the MGS that this target is ready.
1730 * Used by IR - if the MGS receives this message, it will notify clients.
1732 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1734 struct lustre_sb_info *lsi = s2lsi(sb);
1735 struct obd_device *mgc = lsi->lsi_mgc;
1736 struct mgs_target_info *mti = NULL;
1742 if (!(IS_SERVER(lsi)))
1748 rc = server_lsi2mti(lsi, mti);
1752 mti->mti_instance = obd->u.obt.obt_instance;
1753 mti->mti_flags |= LDD_F_OPC_READY;
1755 /* FIXME use mgc_process_config instead */
1756 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1757 sizeof(KEY_REGISTER_TARGET),
1758 KEY_REGISTER_TARGET,
1759 sizeof(*mti), mti, NULL);
1761 /* Imperative recovery: if the mgs informs us to use IR? */
1762 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1763 (mti->mti_flags & LDD_F_IR_CAPABLE))
1764 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1773 /** Start server targets: MDTs and OSTs
1775 static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
1777 struct obd_device *obd;
1778 struct lustre_sb_info *lsi = s2lsi(sb);
1779 struct config_llog_instance cfg;
1781 struct lu_device *dev;
1785 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1788 /* make sure the MDS is started */
1789 mutex_lock(&server_start_lock);
1790 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1792 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1794 LUSTRE_MDS_OBDNAME"_uuid",
1797 mutex_unlock(&server_start_lock);
1798 CERROR("failed to start MDS: %d\n", rc);
1802 mutex_unlock(&server_start_lock);
1805 /* If we're an OST, make sure the global OSS is running */
1807 /* make sure OSS is started */
1808 mutex_lock(&server_start_lock);
1809 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1811 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1813 LUSTRE_OSS_OBDNAME"_uuid",
1816 mutex_unlock(&server_start_lock);
1817 CERROR("failed to start OSS: %d\n", rc);
1821 mutex_unlock(&server_start_lock);
1824 /* Set the mgc fs to our server disk. This allows the MGC to
1825 * read and write configs locally, in case it can't talk to the MGS. */
1826 if (lsi->lsi_srv_mnt) {
1827 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1829 GOTO(out_stop_service, rc);
1832 /* Register with MGS */
1833 rc = server_register_target(lsi);
1837 /* Let the target look up the mount using the target's name
1838 (we can't pass the sb or mnt through class_process_config.) */
1839 rc = server_register_mount(lsi->lsi_svname, sb, mnt);
1843 /* Start targets using the llog named for the target */
1844 memset(&cfg, 0, sizeof(cfg));
1845 cfg.cfg_callback = class_config_llog_handler;
1846 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1848 CERROR("failed to start server %s: %d\n",
1849 lsi->lsi_svname, rc);
1850 /* Do NOT call server_deregister_mount() here. This makes it
1851 * impossible to find mount later in cleanup time and leaves
1852 * @lsi and othder stuff leaked. -umka */
1856 obd = class_name2obd(lsi->lsi_svname);
1858 CERROR("no server named %s was started\n", lsi->lsi_svname);
1859 GOTO(out_mgc, rc = -ENXIO);
1862 if (IS_OST(lsi) || IS_MDT(lsi)) {
1863 rc = lustre_start_lwp(sb);
1865 CERROR("%s: failed to start LWP: %d\n",
1866 lsi->lsi_svname, rc);
1871 server_notify_target(sb, obd);
1873 /* calculate recovery timeout, do it after lustre_process_log */
1874 server_calc_timeout(lsi, obd);
1876 /* log has been fully processed */
1877 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1879 /* log has been fully processed, let clients connect */
1880 dev = obd->obd_lu_dev;
1881 if (dev && dev->ld_ops->ldo_prepare) {
1882 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1884 struct lu_context session_ctx;
1886 lu_context_init(&session_ctx, LCT_SESSION);
1887 session_ctx.lc_thread = NULL;
1888 lu_context_enter(&session_ctx);
1889 env.le_ses = &session_ctx;
1891 rc = dev->ld_ops->ldo_prepare(&env, NULL, dev);
1894 lu_context_exit(&session_ctx);
1895 lu_context_fini(&session_ctx);
1899 /* abort recovery only on the complete stack:
1900 * many devices can be involved */
1901 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1902 (OBP(obd, iocontrol))) {
1903 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1908 /* Release the mgc fs for others to use */
1909 if (lsi->lsi_srv_mnt)
1910 server_mgc_clear_fs(lsi->lsi_mgc);
1914 server_stop_servers(lsi->lsi_flags);
1919 /***************** lustre superblock **************/
1921 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
1923 struct lustre_sb_info *lsi;
1929 OBD_ALLOC_PTR(lsi->lsi_lmd);
1930 if (!lsi->lsi_lmd) {
1935 lsi->lsi_lmd->lmd_exclude_count = 0;
1936 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
1937 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
1938 s2lsi_nocast(sb) = lsi;
1939 /* we take 1 extra ref for our setup */
1940 cfs_atomic_set(&lsi->lsi_mounts, 1);
1942 /* Default umount style */
1943 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
1948 static int lustre_free_lsi(struct super_block *sb)
1950 struct lustre_sb_info *lsi = s2lsi(sb);
1953 LASSERT(lsi != NULL);
1954 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
1956 /* someone didn't call server_put_mount. */
1957 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
1959 if (lsi->lsi_lmd != NULL) {
1960 if (lsi->lsi_lmd->lmd_dev != NULL)
1961 OBD_FREE(lsi->lsi_lmd->lmd_dev,
1962 strlen(lsi->lsi_lmd->lmd_dev) + 1);
1963 if (lsi->lsi_lmd->lmd_profile != NULL)
1964 OBD_FREE(lsi->lsi_lmd->lmd_profile,
1965 strlen(lsi->lsi_lmd->lmd_profile) + 1);
1966 if (lsi->lsi_lmd->lmd_mgssec != NULL)
1967 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
1968 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
1969 if (lsi->lsi_lmd->lmd_opts != NULL)
1970 OBD_FREE(lsi->lsi_lmd->lmd_opts,
1971 strlen(lsi->lsi_lmd->lmd_opts) + 1);
1972 if (lsi->lsi_lmd->lmd_exclude_count)
1973 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
1974 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
1975 lsi->lsi_lmd->lmd_exclude_count);
1976 if (lsi->lsi_lmd->lmd_mgs != NULL)
1977 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
1978 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
1979 if (lsi->lsi_lmd->lmd_osd_type != NULL)
1980 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
1981 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
1982 if (lsi->lsi_lmd->lmd_params != NULL)
1983 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
1985 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
1988 LASSERT(lsi->lsi_llsbi == NULL);
1989 OBD_FREE(lsi, sizeof(*lsi));
1990 s2lsi_nocast(sb) = NULL;
1995 /* The lsi has one reference for every server that is using the disk -
1996 e.g. MDT, MGS, and potentially MGC */
1997 static int lustre_put_lsi(struct super_block *sb)
1999 struct lustre_sb_info *lsi = s2lsi(sb);
2002 LASSERT(lsi != NULL);
2004 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
2005 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
2006 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
2007 obd_disconnect(lsi->lsi_osd_exp);
2008 /* wait till OSD is gone */
2009 obd_zombie_barrier();
2011 lustre_free_lsi(sb);
2017 static int lsi_prepare(struct lustre_sb_info *lsi)
2024 LASSERT(lsi->lsi_lmd);
2026 /* The server name is given as a mount line option */
2027 if (lsi->lsi_lmd->lmd_profile == NULL) {
2028 LCONSOLE_ERROR("Can't determine server name\n");
2032 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname))
2033 RETURN(-ENAMETOOLONG);
2035 strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile);
2037 /* Determine osd type */
2038 if (lsi->lsi_lmd->lmd_osd_type != NULL) {
2039 if (strlen(lsi->lsi_lmd->lmd_osd_type) >=
2040 sizeof(lsi->lsi_osd_type))
2041 RETURN(-ENAMETOOLONG);
2043 strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type);
2045 strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME);
2048 /* XXX: a temp. solution for components using fsfilt
2049 * to be removed in one of the subsequent patches */
2050 if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) {
2051 strcpy(lsi->lsi_fstype, "ldiskfs");
2053 strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type);
2056 /* Determine server type */
2057 rc = server_name2index(lsi->lsi_svname, &index, NULL);
2059 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
2060 /* Assume we're a bare MGS */
2062 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
2064 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
2069 lsi->lsi_flags |= rc;
2071 /* Add mount line flags that used to be in ldd:
2072 * writeconf, mgs, anything else?
2074 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
2075 LDD_F_WRITECONF : 0;
2076 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
2078 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
2079 LDD_F_SV_TYPE_MGS : 0;
2080 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
2081 LDD_F_NO_PRIMNODE : 0;
2086 /*************** server mount ******************/
2088 /** Start the shutdown of servers at umount.
2090 static void server_put_super(struct super_block *sb)
2092 struct lustre_sb_info *lsi = s2lsi(sb);
2093 struct obd_device *obd;
2094 char *tmpname, *extraname = NULL;
2096 int lsiflags = lsi->lsi_flags;
2099 LASSERT(IS_SERVER(lsi));
2101 tmpname_sz = strlen(lsi->lsi_svname) + 1;
2102 OBD_ALLOC(tmpname, tmpname_sz);
2103 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
2104 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
2105 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
2106 snprintf(tmpname, tmpname_sz, "MGS");
2108 /* disconnect the lwp first to drain off the inflight request */
2109 if (IS_OST(lsi) || IS_MDT(lsi)) {
2112 rc = lustre_disconnect_lwp(sb);
2113 if (rc && rc != ETIMEDOUT)
2114 CERROR("%s: failed to disconnect lwp. (rc=%d)\n",
2118 /* Stop the target */
2119 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2120 (IS_MDT(lsi) || IS_OST(lsi))) {
2121 struct lustre_profile *lprof = NULL;
2123 /* tell the mgc to drop the config log */
2124 lustre_end_log(sb, lsi->lsi_svname, NULL);
2126 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
2127 If there are any setup/cleanup errors, save the lov
2128 name for safety cleanup later. */
2129 lprof = class_get_profile(lsi->lsi_svname);
2130 if (lprof && lprof->lp_dt) {
2131 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
2132 strcpy(extraname, lprof->lp_dt);
2135 obd = class_name2obd(lsi->lsi_svname);
2137 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
2138 if (lsiflags & LSI_UMOUNT_FAILOVER)
2140 /* We can't seem to give an error return code
2141 * to .put_super, so we better make sure we clean up! */
2143 class_manual_cleanup(obd);
2145 CERROR("no obd %s\n", lsi->lsi_svname);
2146 server_deregister_mount(lsi->lsi_svname);
2150 /* If they wanted the mgs to stop separately from the mdt, they
2151 should have put it on a different device. */
2153 /* if MDS start with --nomgs, don't stop MGS then */
2154 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
2155 server_stop_mgs(sb);
2158 if (IS_OST(lsi) || IS_MDT(lsi)) {
2159 if (lustre_stop_lwp(sb) < 0)
2160 CERROR("%s: failed to stop lwp!\n", tmpname);
2163 /* Clean the mgc and sb */
2164 lustre_common_put_super(sb);
2166 /* wait till all in-progress cleanups are done
2167 * specifically we're interested in ofd cleanup
2169 obd_zombie_barrier();
2171 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
2172 until the target is really gone so that our type refcount check
2174 server_stop_servers(lsiflags);
2176 /* In case of startup or cleanup err, stop related obds */
2178 obd = class_name2obd(extraname);
2180 CWARN("Cleaning orphaned obd %s\n", extraname);
2182 class_manual_cleanup(obd);
2184 OBD_FREE(extraname, strlen(extraname) + 1);
2187 LCONSOLE_WARN("server umount %s complete\n", tmpname);
2188 OBD_FREE(tmpname, tmpname_sz);
2192 /** Called only for 'umount -f'
2194 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2195 static void server_umount_begin(struct vfsmount *vfsmnt, int flags)
2197 struct super_block *sb = vfsmnt->mnt_sb;
2199 static void server_umount_begin(struct super_block *sb)
2202 struct lustre_sb_info *lsi = s2lsi(sb);
2205 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2206 if (!(flags & MNT_FORCE)) {
2212 CDEBUG(D_MOUNT, "umount -f\n");
2213 /* umount = failover
2215 no third way to do non-force, non-failover */
2216 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
2220 static int server_statfs (struct dentry *dentry, cfs_kstatfs_t *buf)
2222 struct super_block *sb = dentry->d_sb;
2223 struct lustre_sb_info *lsi = s2lsi(sb);
2224 struct obd_statfs statfs;
2228 if (lsi->lsi_dt_dev) {
2229 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
2231 statfs_unpack(buf, &statfs);
2232 buf->f_type = sb->s_magic;
2238 buf->f_type = sb->s_magic;
2239 buf->f_bsize = sb->s_blocksize;
2245 buf->f_namelen = NAME_MAX;
2249 /** The operations we support directly on the superblock:
2250 * mount, umount, and df.
2252 static struct super_operations server_ops =
2254 .put_super = server_put_super,
2255 .umount_begin = server_umount_begin, /* umount -f */
2256 .statfs = server_statfs,
2259 #define log2(n) ffz(~(n))
2260 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
2262 static int server_fill_super_common(struct super_block *sb)
2264 struct inode *root = 0;
2267 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
2269 sb->s_blocksize = 4096;
2270 sb->s_blocksize_bits = log2(sb->s_blocksize);
2271 sb->s_magic = LUSTRE_SUPER_MAGIC;
2272 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
2273 sb->s_flags |= MS_RDONLY;
2274 sb->s_op = &server_ops;
2276 root = new_inode(sb);
2278 CERROR("Can't make root inode\n");
2282 /* returns -EIO for every operation */
2283 /* make_bad_inode(root); -- badness - can't umount */
2284 /* apparently we need to be a directory for the mount to finish */
2285 root->i_mode = S_IFDIR;
2287 sb->s_root = d_make_root(root);
2289 CERROR("%s: can't make root dentry\n", sb->s_id);
2296 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
2298 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2299 struct obd_device *obd;
2300 struct dt_device_param p;
2306 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
2307 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
2309 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
2310 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
2311 strcat(lsi->lsi_osd_uuid, "_UUID");
2312 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
2314 obd = class_name2obd(lsi->lsi_osd_obdname);
2316 rc = lustre_start_simple(lsi->lsi_osd_obdname,
2318 lsi->lsi_osd_uuid, lmd->lmd_dev,
2319 flagstr, lsi->lsi_lmd->lmd_opts,
2323 obd = class_name2obd(lsi->lsi_osd_obdname);
2327 rc = obd_connect(NULL, &lsi->lsi_osd_exp, obd, &obd->obd_uuid, NULL, NULL);
2330 class_manual_cleanup(obd);
2331 lsi->lsi_dt_dev = NULL;
2334 /* XXX: to keep support old components relying on lsi_srv_mnt
2335 * we get this info from OSD just started */
2336 LASSERT(obd->obd_lu_dev);
2337 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
2338 LASSERT(lsi->lsi_dt_dev);
2340 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
2342 lsi->lsi_srv_mnt = p.ddp_mnt;
2348 /** Fill in the superblock info for a Lustre server.
2349 * Mount the device with the correct options.
2350 * Read the on-disk config file.
2351 * Start the services.
2353 static int server_fill_super(struct super_block *sb)
2355 struct lustre_sb_info *lsi = s2lsi(sb);
2359 rc = lsi_prepare(lsi);
2363 /* Start low level OSD */
2364 rc = osd_start(lsi, sb->s_flags);
2366 CERROR("Unable to start osd on %s: %d\n",
2367 lsi->lsi_lmd->lmd_dev, rc);
2372 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
2373 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
2375 if (class_name2obd(lsi->lsi_svname)) {
2376 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
2377 "running. Double-mount may have compromised"
2378 " the disk journal.\n",
2384 /* Start MGS before MGC */
2385 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){
2386 rc = server_start_mgs(sb);
2391 /* Start MGC before servers */
2392 rc = lustre_start_mgc(sb);
2396 /* Set up all obd devices for service */
2397 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2398 (IS_OST(lsi) || IS_MDT(lsi))) {
2399 rc = server_start_targets(sb, lsi->lsi_srv_mnt);
2401 CERROR("Unable to start targets: %d\n", rc);
2404 /* FIXME overmount client here,
2405 or can we just start a client log and client_fill_super on this sb?
2406 We need to make sure server_put_super gets called too - ll_put_super
2407 calls lustre_common_put_super; check there for LSI_SERVER flag,
2409 Probably should start client from new thread so we can return.
2410 Client will not finish until all servers are connected.
2411 Note - MGS-only server does NOT get a client, since there is no
2412 lustre fs associated - the MGS is for all lustre fs's */
2415 rc = server_fill_super_common(sb);
2421 /* We jump here in case of failure while starting targets or MGS.
2422 * In this case we can't just put @mnt and have to do real cleanup
2423 * with stoping targets, etc. */
2424 server_put_super(sb);
2429 * Calculate timeout value for a target.
2431 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
2433 struct lustre_mount_data *lmd;
2437 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
2438 int min = OBD_RECOVERY_TIME_MIN;
2440 LASSERT(IS_SERVER(lsi));
2444 soft = lmd->lmd_recovery_time_soft;
2445 hard = lmd->lmd_recovery_time_hard;
2446 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
2447 obd->obd_no_ir = !has_ir;
2451 soft = OBD_RECOVERY_TIME_SOFT;
2453 hard = OBD_RECOVERY_TIME_HARD;
2455 /* target may have ir_factor configured. */
2456 factor = OBD_IR_FACTOR_DEFAULT;
2457 if (obd->obd_recovery_ir_factor)
2458 factor = obd->obd_recovery_ir_factor;
2461 int new_soft = soft;
2462 int new_hard = hard;
2464 /* adjust timeout value by imperative recovery */
2466 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
2467 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
2469 /* make sure the timeout is not too short */
2470 new_soft = max(min, new_soft);
2471 new_hard = max(new_soft, new_hard);
2473 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
2474 "window shrunk from %d-%d down to %d-%d\n",
2475 obd->obd_name, soft, hard, new_soft, new_hard);
2482 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
2483 obd->obd_recovery_time_hard = hard;
2484 obd->obd_recovery_ir_factor = factor;
2486 EXPORT_SYMBOL(server_calc_timeout);
2488 /*************** mount common betweeen server and client ***************/
2491 int lustre_common_put_super(struct super_block *sb)
2496 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
2498 /* Drop a ref to the MGC */
2499 rc = lustre_stop_mgc(sb);
2500 if (rc && (rc != -ENOENT)) {
2502 CERROR("Can't stop MGC: %d\n", rc);
2505 /* BUSY just means that there's some other obd that
2506 needs the mgc. Let him clean it up. */
2507 CDEBUG(D_MOUNT, "MGC still in use\n");
2509 /* Drop a ref to the mounted disk */
2514 EXPORT_SYMBOL(lustre_common_put_super);
2516 static void lmd_print(struct lustre_mount_data *lmd)
2520 PRINT_CMD(PRINT_MASK, " mount data:\n");
2521 if (lmd_is_client(lmd))
2522 PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile);
2523 PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev);
2524 PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags);
2527 PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts);
2529 if (lmd->lmd_recovery_time_soft)
2530 PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n",
2531 lmd->lmd_recovery_time_soft);
2533 if (lmd->lmd_recovery_time_hard)
2534 PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n",
2535 lmd->lmd_recovery_time_hard);
2537 for (i = 0; i < lmd->lmd_exclude_count; i++) {
2538 PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i,
2539 lmd->lmd_exclude[i]);
2543 /* Is this server on the exclusion list */
2544 int lustre_check_exclusion(struct super_block *sb, char *svname)
2546 struct lustre_sb_info *lsi = s2lsi(sb);
2547 struct lustre_mount_data *lmd = lsi->lsi_lmd;
2552 rc = server_name2index(svname, &index, NULL);
2553 if (rc != LDD_F_SV_TYPE_OST)
2554 /* Only exclude OSTs */
2557 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
2558 index, lmd->lmd_exclude_count, lmd->lmd_dev);
2560 for(i = 0; i < lmd->lmd_exclude_count; i++) {
2561 if (index == lmd->lmd_exclude[i]) {
2562 CWARN("Excluding %s (on exclusion list)\n", svname);
2569 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
2570 static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr)
2572 char *s1 = ptr, *s2;
2573 __u32 index, *exclude_list;
2577 /* The shortest an ost name can be is 8 chars: -OST0000.
2578 We don't actually know the fsname at this time, so in fact
2579 a user could specify any fsname. */
2580 devmax = strlen(ptr) / 8 + 1;
2582 /* temp storage until we figure out how many we have */
2583 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
2587 /* we enter this fn pointing at the '=' */
2588 while (*s1 && *s1 != ' ' && *s1 != ',') {
2590 rc = server_name2index(s1, &index, &s2);
2592 CERROR("Can't parse server name '%s'\n", s1);
2595 if (rc == LDD_F_SV_TYPE_OST)
2596 exclude_list[lmd->lmd_exclude_count++] = index;
2598 CDEBUG(D_MOUNT, "ignoring exclude %.7s\n", s1);
2600 /* now we are pointing at ':' (next exclude)
2601 or ',' (end of excludes) */
2602 if (lmd->lmd_exclude_count >= devmax)
2605 if (rc >= 0) /* non-err */
2608 if (lmd->lmd_exclude_count) {
2609 /* permanent, freed in lustre_free_lsi */
2610 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
2611 lmd->lmd_exclude_count);
2612 if (lmd->lmd_exclude) {
2613 memcpy(lmd->lmd_exclude, exclude_list,
2614 sizeof(index) * lmd->lmd_exclude_count);
2617 lmd->lmd_exclude_count = 0;
2620 OBD_FREE(exclude_list, sizeof(index) * devmax);
2624 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
2629 if (lmd->lmd_mgssec != NULL) {
2630 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
2631 lmd->lmd_mgssec = NULL;
2634 tail = strchr(ptr, ',');
2636 length = strlen(ptr);
2638 length = tail - ptr;
2640 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
2641 if (lmd->lmd_mgssec == NULL)
2644 memcpy(lmd->lmd_mgssec, ptr, length);
2645 lmd->lmd_mgssec[length] = '\0';
2649 static int lmd_parse_string(char **handle, char *ptr)
2654 if ((handle == NULL) || (ptr == NULL))
2657 if (*handle != NULL) {
2658 OBD_FREE(*handle, strlen(*handle) + 1);
2662 tail = strchr(ptr, ',');
2664 length = strlen(ptr);
2666 length = tail - ptr;
2668 OBD_ALLOC(*handle, length + 1);
2669 if (*handle == NULL)
2672 memcpy(*handle, ptr, length);
2673 (*handle)[length] = '\0';
2678 /* Collect multiple values for mgsnid specifiers */
2679 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
2687 /* Find end of nidlist */
2688 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
2689 length = tail - *ptr;
2691 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
2695 if (lmd->lmd_mgs != NULL)
2696 oldlen = strlen(lmd->lmd_mgs) + 1;
2698 OBD_ALLOC(mgsnid, oldlen + length + 1);
2702 if (lmd->lmd_mgs != NULL) {
2703 /* Multiple mgsnid= are taken to mean failover locations */
2704 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
2705 mgsnid[oldlen - 1] = ':';
2706 OBD_FREE(lmd->lmd_mgs, oldlen);
2708 memcpy(mgsnid + oldlen, *ptr, length);
2709 mgsnid[oldlen + length] = '\0';
2710 lmd->lmd_mgs = mgsnid;
2716 /** Parse mount line options
2717 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
2718 * dev is passed as device=uml1:/lustre by mount.lustre
2720 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
2722 char *s1, *s2, *devname = NULL;
2723 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
2729 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
2730 "/sbin/mount.lustre is installed.\n");
2734 /* Options should be a string - try to detect old lmd data */
2735 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
2736 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
2737 "/sbin/mount.lustre. Please install "
2738 "version %s\n", LUSTRE_VERSION_STRING);
2741 lmd->lmd_magic = LMD_MAGIC;
2743 OBD_ALLOC(lmd->lmd_params, 4096);
2744 if (lmd->lmd_params == NULL)
2746 lmd->lmd_params[0] = '\0';
2748 /* Set default flags here */
2753 int time_min = OBD_RECOVERY_TIME_MIN;
2755 /* Skip whitespace and extra commas */
2756 while (*s1 == ' ' || *s1 == ',')
2759 /* Client options are parsed in ll_options: eg. flock,
2762 /* Parse non-ldiskfs options here. Rather than modifying
2763 ldiskfs, we just zero these out here */
2764 if (strncmp(s1, "abort_recov", 11) == 0) {
2765 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
2767 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
2768 lmd->lmd_recovery_time_soft = max_t(int,
2769 simple_strtoul(s1 + 19, NULL, 10), time_min);
2771 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
2772 lmd->lmd_recovery_time_hard = max_t(int,
2773 simple_strtoul(s1 + 19, NULL, 10), time_min);
2775 } else if (strncmp(s1, "noir", 4) == 0) {
2776 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
2778 } else if (strncmp(s1, "nosvc", 5) == 0) {
2779 lmd->lmd_flags |= LMD_FLG_NOSVC;
2781 } else if (strncmp(s1, "nomgs", 5) == 0) {
2782 lmd->lmd_flags |= LMD_FLG_NOMGS;
2784 } else if (strncmp(s1, "noscrub", 7) == 0) {
2785 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
2787 } else if (strncmp(s1, PARAM_MGSNODE,
2788 sizeof(PARAM_MGSNODE) - 1) == 0) {
2789 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
2790 /* Assume the next mount opt is the first
2791 invalid nid we get to. */
2792 rc = lmd_parse_mgs(lmd, &s2);
2796 } else if (strncmp(s1, "writeconf", 9) == 0) {
2797 lmd->lmd_flags |= LMD_FLG_WRITECONF;
2799 } else if (strncmp(s1, "virgin", 6) == 0) {
2800 lmd->lmd_flags |= LMD_FLG_VIRGIN;
2802 } else if (strncmp(s1, "noprimnode", 10) == 0) {
2803 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
2805 } else if (strncmp(s1, "mgssec=", 7) == 0) {
2806 rc = lmd_parse_mgssec(lmd, s1 + 7);
2810 /* ost exclusion list */
2811 } else if (strncmp(s1, "exclude=", 8) == 0) {
2812 rc = lmd_make_exclusion(lmd, s1 + 7);
2816 } else if (strncmp(s1, "mgs", 3) == 0) {
2818 lmd->lmd_flags |= LMD_FLG_MGS;
2820 } else if (strncmp(s1, "svname=", 7) == 0) {
2821 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
2825 } else if (strncmp(s1, "param=", 6) == 0) {
2827 char *tail = strchr(s1 + 6, ',');
2829 length = strlen(s1);
2833 strncat(lmd->lmd_params, s1 + 6, length);
2834 strcat(lmd->lmd_params, " ");
2836 } else if (strncmp(s1, "osd=", 4) == 0) {
2837 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
2842 /* Linux 2.4 doesn't pass the device, so we stuck it at the
2843 end of the options. */
2844 else if (strncmp(s1, "device=", 7) == 0) {
2846 /* terminate options right before device. device
2847 must be the last one. */
2853 s2 = strchr(s1, ',');
2861 memmove(s1, s2, strlen(s2) + 1);
2867 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
2868 "(need mount option 'device=...')\n");
2872 s1 = strstr(devname, ":/");
2875 lmd->lmd_flags |= LMD_FLG_CLIENT;
2876 /* Remove leading /s from fsname */
2877 while (*++s1 == '/') ;
2878 /* Freed in lustre_free_lsi */
2879 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
2880 if (!lmd->lmd_profile)
2882 sprintf(lmd->lmd_profile, "%s-client", s1);
2885 /* Freed in lustre_free_lsi */
2886 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
2889 strcpy(lmd->lmd_dev, devname);
2891 /* Save mount options */
2892 s1 = options + strlen(options) - 1;
2893 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
2895 if (*options != 0) {
2896 /* Freed in lustre_free_lsi */
2897 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
2900 strcpy(lmd->lmd_opts, options);
2904 lmd->lmd_magic = LMD_MAGIC;
2909 CERROR("Bad mount options %s\n", options);
2913 struct lustre_mount_data2 {
2915 struct vfsmount *lmd2_mnt;
2918 /** This is the entry point for the mount call into Lustre.
2919 * This is called when a server or client is mounted,
2920 * and this is where we start setting things up.
2921 * @param data Mount options (e.g. -o flock,abort_recov)
2923 int lustre_fill_super(struct super_block *sb, void *data, int silent)
2925 struct lustre_mount_data *lmd;
2926 struct lustre_mount_data2 *lmd2 = data;
2927 struct lustre_sb_info *lsi;
2931 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
2933 lsi = lustre_init_lsi(sb);
2939 * Disable lockdep during mount, because mount locking patterns are
2945 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
2947 obd_zombie_barrier();
2949 /* Figure out the lmd from the mount options */
2950 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
2952 GOTO(out, rc = -EINVAL);
2955 if (lmd_is_client(lmd)) {
2956 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
2957 if (!client_fill_super) {
2958 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
2959 "client mount! Is the 'lustre' "
2960 "module loaded?\n");
2964 rc = lustre_start_mgc(sb);
2969 /* Connect and start */
2970 /* (should always be ll_fill_super) */
2971 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
2972 /* c_f_s will call lustre_common_put_super on failure */
2975 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
2976 rc = server_fill_super(sb);
2977 /* s_f_s calls lustre_start_mgc after the mount because we need
2978 the MGS nids which are stored on disk. Plus, we may
2979 need to start the MGS first. */
2980 /* s_f_s will call server_put_super on failure */
2983 /* If error happens in fill_super() call, @lsi will be killed there.
2984 * This is why we do not put it here. */
2988 CERROR("Unable to mount %s (%d)\n",
2989 s2lsi(sb) ? lmd->lmd_dev : "", rc);
2991 CDEBUG(D_SUPER, "Mount %s complete\n",
2999 /* We can't call ll_fill_super by name because it lives in a module that
3000 must be loaded after this one. */
3001 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
3002 struct vfsmount *mnt))
3004 client_fill_super = cfs;
3006 EXPORT_SYMBOL(lustre_register_client_fill_super);
3008 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
3010 kill_super_cb = cfs;
3012 EXPORT_SYMBOL(lustre_register_kill_super_cb);
3014 /***************** FS registration ******************/
3015 #ifdef HAVE_FSTYPE_MOUNT
3016 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
3017 const char *devname, void *data)
3019 struct lustre_mount_data2 lmd2 = { data, NULL };
3021 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
3024 int lustre_get_sb(struct file_system_type *fs_type, int flags,
3025 const char *devname, void * data, struct vfsmount *mnt)
3027 struct lustre_mount_data2 lmd2 = { data, mnt };
3029 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
3033 void lustre_kill_super(struct super_block *sb)
3035 struct lustre_sb_info *lsi = s2lsi(sb);
3037 if (kill_super_cb && lsi && !IS_SERVER(lsi))
3038 (*kill_super_cb)(sb);
3040 kill_anon_super(sb);
3043 /** Register the "lustre" fs type
3045 struct file_system_type lustre_fs_type = {
3046 .owner = THIS_MODULE,
3048 #ifdef HAVE_FSTYPE_MOUNT
3049 .mount = lustre_mount,
3051 .get_sb = lustre_get_sb,
3053 .kill_sb = lustre_kill_super,
3054 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
3055 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
3058 int lustre_register_fs(void)
3060 return register_filesystem(&lustre_fs_type);
3063 int lustre_unregister_fs(void)
3065 return unregister_filesystem(&lustre_fs_type);
3068 EXPORT_SYMBOL(server_mti_print);