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, 2013, 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 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
50 #include <obd_class.h>
51 #include <lustre/lustre_user.h>
52 #include <linux/version.h>
53 #include <lustre_log.h>
54 #include <lustre_disk.h>
55 #include <lustre_param.h>
57 static int (*client_fill_super)(struct super_block *sb,
58 struct vfsmount *mnt);
60 static void (*kill_super_cb)(struct super_block *sb);
62 /**************** config llog ********************/
64 /** Get a config log from the MGS and process it.
65 * This func is called for both clients and servers.
66 * Continue to process new statements appended to the logs
67 * (whenever the config lock is revoked) until lustre_end_log
69 * @param sb The superblock is used by the MGC to write to the local copy of
71 * @param logname The name of the llog to replicate from the MGS
72 * @param cfg Since the same mgc may be used to follow multiple config logs
73 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
74 * this log, and is added to the mgc's list of logs to follow.
76 int lustre_process_log(struct super_block *sb, char *logname,
77 struct config_llog_instance *cfg)
79 struct lustre_cfg *lcfg;
80 struct lustre_cfg_bufs *bufs;
81 struct lustre_sb_info *lsi = s2lsi(sb);
82 struct obd_device *mgc = lsi->lsi_mgc;
93 /* mgc_process_config */
94 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
95 lustre_cfg_bufs_set_string(bufs, 1, logname);
96 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
97 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
98 lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
99 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
100 lustre_cfg_free(lcfg);
105 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s'"
106 "failed from the MGS (%d). Make sure this "
107 "client and the MGS are running compatible "
108 "versions of Lustre.\n",
109 mgc->obd_name, logname, rc);
112 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' "
113 "failed (%d). This may be the result of "
114 "communication errors between this node and "
115 "the MGS, a bad configuration, or other "
116 "errors. See the syslog for more "
117 "information.\n", mgc->obd_name, logname,
120 /* class_obd_list(); */
123 EXPORT_SYMBOL(lustre_process_log);
125 /* Stop watching this config log for updates */
126 int lustre_end_log(struct super_block *sb, char *logname,
127 struct config_llog_instance *cfg)
129 struct lustre_cfg *lcfg;
130 struct lustre_cfg_bufs bufs;
131 struct lustre_sb_info *lsi = s2lsi(sb);
132 struct obd_device *mgc = lsi->lsi_mgc;
139 /* mgc_process_config */
140 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
141 lustre_cfg_bufs_set_string(&bufs, 1, logname);
143 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
144 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
145 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
146 lustre_cfg_free(lcfg);
149 EXPORT_SYMBOL(lustre_end_log);
151 /**************** obd start *******************/
153 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
154 * lctl (and do for echo cli/srv.
156 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
157 char *s1, char *s2, char *s3, char *s4)
159 struct lustre_cfg_bufs bufs;
160 struct lustre_cfg * lcfg = NULL;
163 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
164 cmd, s1, s2, s3, s4);
166 lustre_cfg_bufs_reset(&bufs, cfgname);
168 lustre_cfg_bufs_set_string(&bufs, 1, s1);
170 lustre_cfg_bufs_set_string(&bufs, 2, s2);
172 lustre_cfg_bufs_set_string(&bufs, 3, s3);
174 lustre_cfg_bufs_set_string(&bufs, 4, s4);
176 lcfg = lustre_cfg_new(cmd, &bufs);
177 lcfg->lcfg_nid = nid;
178 rc = class_process_config(lcfg);
179 lustre_cfg_free(lcfg);
182 EXPORT_SYMBOL(do_lcfg);
184 /** Call class_attach and class_setup. These methods in turn call
185 * obd type-specific methods.
187 int lustre_start_simple(char *obdname, char *type, char *uuid,
188 char *s1, char *s2, char *s3, char *s4)
191 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
193 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0);
195 CERROR("%s attach error %d\n", obdname, rc);
198 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
200 CERROR("%s setup error %d\n", obdname, rc);
201 do_lcfg(obdname, 0, LCFG_DETACH, 0, 0, 0, 0);
206 DEFINE_MUTEX(mgc_start_lock);
208 /** Set up a mgc obd to process startup logs
210 * \param sb [in] super block of the mgc obd
212 * \retval 0 success, otherwise error code
214 int lustre_start_mgc(struct super_block *sb)
216 struct obd_connect_data *data = NULL;
217 struct lustre_sb_info *lsi = s2lsi(sb);
218 struct obd_device *obd;
219 struct obd_export *exp;
220 struct obd_uuid *uuid;
223 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
226 int rc = 0, i = 0, j, len;
229 LASSERT(lsi->lsi_lmd);
231 /* Find the first non-lo MGS nid for our MGC name */
232 if (IS_SERVER(lsi)) {
233 /* mount -o mgsnode=nid */
234 ptr = lsi->lsi_lmd->lmd_mgs;
235 if (lsi->lsi_lmd->lmd_mgs &&
236 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
238 } else if (IS_MGS(lsi)) {
239 lnet_process_id_t id;
240 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
241 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
248 } else { /* client */
249 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
250 ptr = lsi->lsi_lmd->lmd_dev;
251 if (class_parse_nid(ptr, &nid, &ptr) == 0)
255 CERROR("No valid MGS nids found.\n");
259 mutex_lock(&mgc_start_lock);
261 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
262 OBD_ALLOC(mgcname, len);
263 OBD_ALLOC(niduuid, len + 2);
264 if (!mgcname || !niduuid)
265 GOTO(out_free, rc = -ENOMEM);
266 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
268 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
272 GOTO(out_free, rc = -ENOMEM);
274 obd = class_name2obd(mgcname);
275 if (obd && !obd->obd_stopping) {
276 rc = obd_set_info_async(NULL, obd->obd_self_export,
277 strlen(KEY_MGSSEC), KEY_MGSSEC,
278 strlen(mgssec), mgssec, NULL);
282 /* Re-using an existing MGC */
283 cfs_atomic_inc(&obd->u.cli.cl_mgc_refcount);
285 /* IR compatibility check, only for clients */
286 if (lmd_is_client(lsi->lsi_lmd)) {
288 int vallen = sizeof(*data);
289 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
291 rc = obd_get_info(NULL, obd->obd_self_export,
292 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
293 &vallen, data, NULL);
295 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
296 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
297 /* LMD_FLG_NOIR is for test purpose only */
299 "Trying to mount a client with IR setting "
300 "not compatible with current mgc. "
301 "Force to use current mgc setting that is "
303 has_ir ? "enabled" : "disabled");
305 *flags &= ~LMD_FLG_NOIR;
307 *flags |= LMD_FLG_NOIR;
312 /* If we are restarting the MGS, don't try to keep the MGC's
313 old connection, or registration will fail. */
315 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
319 /* Try all connections, but only once (again).
320 We don't want to block another target from starting
321 (using its local copy of the log), but we do want to connect
322 if at all possible. */
324 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,recov_bk);
325 rc = obd_set_info_async(NULL, obd->obd_self_export,
326 sizeof(KEY_INIT_RECOV_BACKUP),
327 KEY_INIT_RECOV_BACKUP,
328 sizeof(recov_bk), &recov_bk, NULL);
332 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
334 /* Add the primary nids for the MGS */
336 sprintf(niduuid, "%s_%x", mgcname, i);
337 if (IS_SERVER(lsi)) {
338 ptr = lsi->lsi_lmd->lmd_mgs;
340 /* Use local nids (including LO) */
341 lnet_process_id_t id;
342 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
343 rc = do_lcfg(mgcname, id.nid,
344 LCFG_ADD_UUID, niduuid, 0,0,0);
347 /* Use mgsnode= nids */
348 /* mount -o mgsnode=nid */
349 if (lsi->lsi_lmd->lmd_mgs) {
350 ptr = lsi->lsi_lmd->lmd_mgs;
351 } else if (class_find_param(ptr, PARAM_MGSNODE,
353 CERROR("No MGS nids given.\n");
354 GOTO(out_free, rc = -EINVAL);
356 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
357 rc = do_lcfg(mgcname, nid,
358 LCFG_ADD_UUID, niduuid, 0,0,0);
362 } else { /* client */
363 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
364 ptr = lsi->lsi_lmd->lmd_dev;
365 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
366 rc = do_lcfg(mgcname, nid,
367 LCFG_ADD_UUID, niduuid, 0,0,0);
369 /* Stop at the first failover nid */
375 CERROR("No valid MGS nids found.\n");
376 GOTO(out_free, rc = -EINVAL);
378 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
380 /* Random uuid for MGC allows easier reconnects */
382 ll_generate_random_uuid(uuidc);
383 class_uuid_unparse(uuidc, uuid);
386 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
387 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
393 /* Add any failover MGS nids */
395 while (ptr && ((*ptr == ':' ||
396 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
397 /* New failover node */
398 sprintf(niduuid, "%s_%x", mgcname, i);
400 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
402 rc = do_lcfg(mgcname, nid,
403 LCFG_ADD_UUID, niduuid, 0,0,0);
408 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
416 lsi->lsi_lmd->lmd_mgs_failnodes = i;
418 obd = class_name2obd(mgcname);
420 CERROR("Can't find mgcobd %s\n", mgcname);
421 GOTO(out_free, rc = -ENOTCONN);
424 rc = obd_set_info_async(NULL, obd->obd_self_export,
425 strlen(KEY_MGSSEC), KEY_MGSSEC,
426 strlen(mgssec), mgssec, NULL);
430 /* Keep a refcount of servers/clients who started with "mount",
431 so we know when we can get rid of the mgc. */
432 cfs_atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
434 /* Try all connections, but only once. */
436 rc = obd_set_info_async(NULL, obd->obd_self_export,
437 sizeof(KEY_INIT_RECOV_BACKUP),
438 KEY_INIT_RECOV_BACKUP,
439 sizeof(recov_bk), &recov_bk, NULL);
442 CWARN("can't set %s %d\n", KEY_INIT_RECOV_BACKUP, rc);
444 /* We connect to the MGS at setup, and don't disconnect until cleanup */
445 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
446 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
447 OBD_CONNECT_LVB_TYPE;
449 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
450 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
452 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
455 if (lmd_is_client(lsi->lsi_lmd) &&
456 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
457 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
458 data->ocd_version = LUSTRE_VERSION_CODE;
459 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
461 CERROR("connect failed %d\n", rc);
465 obd->u.cli.cl_mgc_mgsexp = exp;
468 /* Keep the mgc info in the sb. Note that many lsi's can point
472 mutex_unlock(&mgc_start_lock);
477 OBD_FREE(mgcname, len);
479 OBD_FREE(niduuid, len + 2);
483 static int lustre_stop_mgc(struct super_block *sb)
485 struct lustre_sb_info *lsi = s2lsi(sb);
486 struct obd_device *obd;
487 char *niduuid = 0, *ptr = 0;
488 int i, rc = 0, len = 0;
498 mutex_lock(&mgc_start_lock);
499 LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
500 if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
501 /* This is not fatal, every client that stops
502 will call in here. */
503 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
504 cfs_atomic_read(&obd->u.cli.cl_mgc_refcount));
505 GOTO(out, rc = -EBUSY);
508 /* The MGC has no recoverable data in any case.
509 * force shotdown set in umount_begin */
510 obd->obd_no_recov = 1;
512 if (obd->u.cli.cl_mgc_mgsexp) {
513 /* An error is not fatal, if we are unable to send the
514 disconnect mgs ping evictor cleans up the export */
515 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
517 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
520 /* Save the obdname for cleaning the nid uuids, which are
522 len = strlen(obd->obd_name) + 6;
523 OBD_ALLOC(niduuid, len);
525 strcpy(niduuid, obd->obd_name);
526 ptr = niduuid + strlen(niduuid);
529 rc = class_manual_cleanup(obd);
533 /* Clean the nid uuids */
535 GOTO(out, rc = -ENOMEM);
537 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
538 sprintf(ptr, "_%x", i);
539 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
542 CERROR("del MDC UUID %s failed: rc = %d\n",
547 OBD_FREE(niduuid, len);
549 /* class_import_put will get rid of the additional connections */
550 mutex_unlock(&mgc_start_lock);
554 /***************** lustre superblock **************/
556 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
558 struct lustre_sb_info *lsi;
564 OBD_ALLOC_PTR(lsi->lsi_lmd);
570 lsi->lsi_lmd->lmd_exclude_count = 0;
571 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
572 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
573 s2lsi_nocast(sb) = lsi;
574 /* we take 1 extra ref for our setup */
575 cfs_atomic_set(&lsi->lsi_mounts, 1);
577 /* Default umount style */
578 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
583 static int lustre_free_lsi(struct super_block *sb)
585 struct lustre_sb_info *lsi = s2lsi(sb);
588 LASSERT(lsi != NULL);
589 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
591 /* someone didn't call server_put_mount. */
592 LASSERT(cfs_atomic_read(&lsi->lsi_mounts) == 0);
594 if (lsi->lsi_lmd != NULL) {
595 if (lsi->lsi_lmd->lmd_dev != NULL)
596 OBD_FREE(lsi->lsi_lmd->lmd_dev,
597 strlen(lsi->lsi_lmd->lmd_dev) + 1);
598 if (lsi->lsi_lmd->lmd_profile != NULL)
599 OBD_FREE(lsi->lsi_lmd->lmd_profile,
600 strlen(lsi->lsi_lmd->lmd_profile) + 1);
601 if (lsi->lsi_lmd->lmd_mgssec != NULL)
602 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
603 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
604 if (lsi->lsi_lmd->lmd_opts != NULL)
605 OBD_FREE(lsi->lsi_lmd->lmd_opts,
606 strlen(lsi->lsi_lmd->lmd_opts) + 1);
607 if (lsi->lsi_lmd->lmd_exclude_count)
608 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
609 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
610 lsi->lsi_lmd->lmd_exclude_count);
611 if (lsi->lsi_lmd->lmd_mgs != NULL)
612 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
613 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
614 if (lsi->lsi_lmd->lmd_osd_type != NULL)
615 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
616 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
617 if (lsi->lsi_lmd->lmd_params != NULL)
618 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
620 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
623 LASSERT(lsi->lsi_llsbi == NULL);
624 OBD_FREE(lsi, sizeof(*lsi));
625 s2lsi_nocast(sb) = NULL;
630 /* The lsi has one reference for every server that is using the disk -
631 e.g. MDT, MGS, and potentially MGC */
632 int lustre_put_lsi(struct super_block *sb)
634 struct lustre_sb_info *lsi = s2lsi(sb);
637 LASSERT(lsi != NULL);
639 CDEBUG(D_MOUNT, "put %p %d\n", sb, cfs_atomic_read(&lsi->lsi_mounts));
640 if (cfs_atomic_dec_and_test(&lsi->lsi_mounts)) {
641 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
642 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
643 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
644 lsi->lsi_dt_dev = NULL;
645 obd_disconnect(lsi->lsi_osd_exp);
646 /* wait till OSD is gone */
647 obd_zombie_barrier();
656 * <FSNAME><SEPERATOR><TYPE><INDEX>
657 * FSNAME is between 1 and 8 characters (inclusive).
658 * Excluded characters are '/' and ':'
659 * SEPERATOR is either ':' or '-'
660 * TYPE: "OST", "MDT", etc.
661 * INDEX: Hex representation of the index
664 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
665 * @param [in] svname server name including type and index
666 * @param [out] fsname Buffer to copy filesystem name prefix into.
667 * Must have at least 'strlen(fsname) + 1' chars.
668 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
671 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
675 dash = svname + strnlen(svname, 8); /* max fsname length is 8 */
676 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
681 if (fsname != NULL) {
682 strncpy(fsname, svname, dash - svname);
683 fsname[dash - svname] = '\0';
691 EXPORT_SYMBOL(server_name2fsname);
694 * Get service name (svname) from string
696 * if endptr isn't NULL it is set to end of fsname *
698 int server_name2svname(const char *label, char *svname, const char **endptr,
704 /* We use server_name2fsname() just for parsing */
705 rc = server_name2fsname(label, NULL, &dash);
712 if (strlcpy(svname, dash + 1, svsize) >= svsize)
717 EXPORT_SYMBOL(server_name2svname);
720 /* Get the index from the obd name.
723 if endptr isn't NULL it is set to end of name */
724 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
730 /* We use server_name2fsname() just for parsing */
731 rc = server_name2fsname(svname, NULL, &dash);
737 if (strncmp(dash, "MDT", 3) == 0)
738 rc = LDD_F_SV_TYPE_MDT;
739 else if (strncmp(dash, "OST", 3) == 0)
740 rc = LDD_F_SV_TYPE_OST;
746 if (strncmp(dash, "all", 3) == 0) {
749 return rc | LDD_F_SV_ALL;
752 index = simple_strtoul(dash, (char **)endptr, 16);
756 /* Account for -mdc after index that is possible when specifying mdt */
757 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
758 sizeof(LUSTRE_MDC_NAME)-1) == 0)
759 *endptr += sizeof(LUSTRE_MDC_NAME);
763 EXPORT_SYMBOL(server_name2index);
765 /*************** mount common betweeen server and client ***************/
768 int lustre_common_put_super(struct super_block *sb)
773 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
775 /* Drop a ref to the MGC */
776 rc = lustre_stop_mgc(sb);
777 if (rc && (rc != -ENOENT)) {
779 CERROR("Can't stop MGC: %d\n", rc);
782 /* BUSY just means that there's some other obd that
783 needs the mgc. Let him clean it up. */
784 CDEBUG(D_MOUNT, "MGC still in use\n");
786 /* Drop a ref to the mounted disk */
791 EXPORT_SYMBOL(lustre_common_put_super);
793 static void lmd_print(struct lustre_mount_data *lmd)
797 PRINT_CMD(D_MOUNT, " mount data:\n");
798 if (lmd_is_client(lmd))
799 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
800 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
801 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
804 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
806 if (lmd->lmd_recovery_time_soft)
807 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
808 lmd->lmd_recovery_time_soft);
810 if (lmd->lmd_recovery_time_hard)
811 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
812 lmd->lmd_recovery_time_hard);
814 for (i = 0; i < lmd->lmd_exclude_count; i++) {
815 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
816 lmd->lmd_exclude[i]);
820 /* Is this server on the exclusion list */
821 int lustre_check_exclusion(struct super_block *sb, char *svname)
823 struct lustre_sb_info *lsi = s2lsi(sb);
824 struct lustre_mount_data *lmd = lsi->lsi_lmd;
829 rc = server_name2index(svname, &index, NULL);
830 if (rc != LDD_F_SV_TYPE_OST)
831 /* Only exclude OSTs */
834 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
835 index, lmd->lmd_exclude_count, lmd->lmd_dev);
837 for(i = 0; i < lmd->lmd_exclude_count; i++) {
838 if (index == lmd->lmd_exclude[i]) {
839 CWARN("Excluding %s (on exclusion list)\n", svname);
846 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
847 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
849 const char *s1 = ptr, *s2;
850 __u32 index, *exclude_list;
854 /* The shortest an ost name can be is 8 chars: -OST0000.
855 We don't actually know the fsname at this time, so in fact
856 a user could specify any fsname. */
857 devmax = strlen(ptr) / 8 + 1;
859 /* temp storage until we figure out how many we have */
860 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
864 /* we enter this fn pointing at the '=' */
865 while (*s1 && *s1 != ' ' && *s1 != ',') {
867 rc = server_name2index(s1, &index, &s2);
869 CERROR("Can't parse server name '%s': rc = %d\n",
873 if (rc == LDD_F_SV_TYPE_OST)
874 exclude_list[lmd->lmd_exclude_count++] = index;
876 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
877 (uint)(s2-s1), s1, rc);
879 /* now we are pointing at ':' (next exclude)
880 or ',' (end of excludes) */
881 if (lmd->lmd_exclude_count >= devmax)
884 if (rc >= 0) /* non-err */
887 if (lmd->lmd_exclude_count) {
888 /* permanent, freed in lustre_free_lsi */
889 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
890 lmd->lmd_exclude_count);
891 if (lmd->lmd_exclude) {
892 memcpy(lmd->lmd_exclude, exclude_list,
893 sizeof(index) * lmd->lmd_exclude_count);
896 lmd->lmd_exclude_count = 0;
899 OBD_FREE(exclude_list, sizeof(index) * devmax);
903 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
908 if (lmd->lmd_mgssec != NULL) {
909 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
910 lmd->lmd_mgssec = NULL;
913 tail = strchr(ptr, ',');
915 length = strlen(ptr);
919 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
920 if (lmd->lmd_mgssec == NULL)
923 memcpy(lmd->lmd_mgssec, ptr, length);
924 lmd->lmd_mgssec[length] = '\0';
928 static int lmd_parse_string(char **handle, char *ptr)
933 if ((handle == NULL) || (ptr == NULL))
936 if (*handle != NULL) {
937 OBD_FREE(*handle, strlen(*handle) + 1);
941 tail = strchr(ptr, ',');
943 length = strlen(ptr);
947 OBD_ALLOC(*handle, length + 1);
951 memcpy(*handle, ptr, length);
952 (*handle)[length] = '\0';
957 /* Collect multiple values for mgsnid specifiers */
958 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
966 /* Find end of nidlist */
967 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
968 length = tail - *ptr;
970 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
974 if (lmd->lmd_mgs != NULL)
975 oldlen = strlen(lmd->lmd_mgs) + 1;
977 OBD_ALLOC(mgsnid, oldlen + length + 1);
981 if (lmd->lmd_mgs != NULL) {
982 /* Multiple mgsnid= are taken to mean failover locations */
983 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
984 mgsnid[oldlen - 1] = ':';
985 OBD_FREE(lmd->lmd_mgs, oldlen);
987 memcpy(mgsnid + oldlen, *ptr, length);
988 mgsnid[oldlen + length] = '\0';
989 lmd->lmd_mgs = mgsnid;
995 /** Parse mount line options
996 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
997 * dev is passed as device=uml1:/lustre by mount.lustre
999 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
1001 char *s1, *s2, *devname = NULL;
1002 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
1008 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that "
1009 "/sbin/mount.lustre is installed.\n");
1013 /* Options should be a string - try to detect old lmd data */
1014 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1015 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of "
1016 "/sbin/mount.lustre. Please install "
1017 "version %s\n", LUSTRE_VERSION_STRING);
1020 lmd->lmd_magic = LMD_MAGIC;
1022 OBD_ALLOC(lmd->lmd_params, 4096);
1023 if (lmd->lmd_params == NULL)
1025 lmd->lmd_params[0] = '\0';
1027 /* Set default flags here */
1032 int time_min = OBD_RECOVERY_TIME_MIN;
1034 /* Skip whitespace and extra commas */
1035 while (*s1 == ' ' || *s1 == ',')
1038 /* Client options are parsed in ll_options: eg. flock,
1041 /* Parse non-ldiskfs options here. Rather than modifying
1042 ldiskfs, we just zero these out here */
1043 if (strncmp(s1, "abort_recov", 11) == 0) {
1044 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1046 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1047 lmd->lmd_recovery_time_soft = max_t(int,
1048 simple_strtoul(s1 + 19, NULL, 10), time_min);
1050 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1051 lmd->lmd_recovery_time_hard = max_t(int,
1052 simple_strtoul(s1 + 19, NULL, 10), time_min);
1054 } else if (strncmp(s1, "noir", 4) == 0) {
1055 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1057 } else if (strncmp(s1, "nosvc", 5) == 0) {
1058 lmd->lmd_flags |= LMD_FLG_NOSVC;
1060 } else if (strncmp(s1, "nomgs", 5) == 0) {
1061 lmd->lmd_flags |= LMD_FLG_NOMGS;
1063 } else if (strncmp(s1, "noscrub", 7) == 0) {
1064 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1066 } else if (strncmp(s1, PARAM_MGSNODE,
1067 sizeof(PARAM_MGSNODE) - 1) == 0) {
1068 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1069 /* Assume the next mount opt is the first
1070 invalid nid we get to. */
1071 rc = lmd_parse_mgs(lmd, &s2);
1075 } else if (strncmp(s1, "writeconf", 9) == 0) {
1076 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1078 } else if (strncmp(s1, "update", 6) == 0) {
1079 lmd->lmd_flags |= LMD_FLG_UPDATE;
1081 } else if (strncmp(s1, "virgin", 6) == 0) {
1082 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1084 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1085 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1087 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1088 rc = lmd_parse_mgssec(lmd, s1 + 7);
1092 /* ost exclusion list */
1093 } else if (strncmp(s1, "exclude=", 8) == 0) {
1094 rc = lmd_make_exclusion(lmd, s1 + 7);
1098 } else if (strncmp(s1, "mgs", 3) == 0) {
1100 lmd->lmd_flags |= LMD_FLG_MGS;
1102 } else if (strncmp(s1, "svname=", 7) == 0) {
1103 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1107 } else if (strncmp(s1, "param=", 6) == 0) {
1109 char *tail = strchr(s1 + 6, ',');
1111 length = strlen(s1);
1115 strncat(lmd->lmd_params, s1 + 6, length);
1116 strcat(lmd->lmd_params, " ");
1118 } else if (strncmp(s1, "osd=", 4) == 0) {
1119 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1124 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1125 end of the options. */
1126 else if (strncmp(s1, "device=", 7) == 0) {
1128 /* terminate options right before device. device
1129 must be the last one. */
1135 s2 = strchr(s1, ',');
1143 memmove(s1, s2, strlen(s2) + 1);
1149 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name "
1150 "(need mount option 'device=...')\n");
1154 s1 = strstr(devname, ":/");
1157 lmd->lmd_flags |= LMD_FLG_CLIENT;
1158 /* Remove leading /s from fsname */
1159 while (*++s1 == '/') ;
1160 /* Freed in lustre_free_lsi */
1161 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
1162 if (!lmd->lmd_profile)
1164 sprintf(lmd->lmd_profile, "%s-client", s1);
1167 /* Freed in lustre_free_lsi */
1168 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1171 strcpy(lmd->lmd_dev, devname);
1173 /* Save mount options */
1174 s1 = options + strlen(options) - 1;
1175 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1177 if (*options != 0) {
1178 /* Freed in lustre_free_lsi */
1179 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1182 strcpy(lmd->lmd_opts, options);
1186 lmd->lmd_magic = LMD_MAGIC;
1191 CERROR("Bad mount options %s\n", options);
1195 struct lustre_mount_data2 {
1197 struct vfsmount *lmd2_mnt;
1200 /** This is the entry point for the mount call into Lustre.
1201 * This is called when a server or client is mounted,
1202 * and this is where we start setting things up.
1203 * @param data Mount options (e.g. -o flock,abort_recov)
1205 int lustre_fill_super(struct super_block *sb, void *data, int silent)
1207 struct lustre_mount_data *lmd;
1208 struct lustre_mount_data2 *lmd2 = data;
1209 struct lustre_sb_info *lsi;
1213 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1215 lsi = lustre_init_lsi(sb);
1221 * Disable lockdep during mount, because mount locking patterns are
1227 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
1229 obd_zombie_barrier();
1231 /* Figure out the lmd from the mount options */
1232 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
1234 GOTO(out, rc = -EINVAL);
1237 if (lmd_is_client(lmd)) {
1238 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1239 if (!client_fill_super) {
1240 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for "
1241 "client mount! Is the 'lustre' "
1242 "module loaded?\n");
1246 rc = lustre_start_mgc(sb);
1251 /* Connect and start */
1252 /* (should always be ll_fill_super) */
1253 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
1254 /* c_f_s will call lustre_common_put_super on failure */
1257 #ifdef HAVE_SERVER_SUPPORT
1258 CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev);
1259 rc = server_fill_super(sb);
1260 /* s_f_s calls lustre_start_mgc after the mount because we need
1261 the MGS nids which are stored on disk. Plus, we may
1262 need to start the MGS first. */
1263 /* s_f_s will call server_put_super on failure */
1265 CERROR("This is client-side-only module, "
1266 "cannot handle server mount.\n");
1271 /* If error happens in fill_super() call, @lsi will be killed there.
1272 * This is why we do not put it here. */
1276 CERROR("Unable to mount %s (%d)\n",
1277 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1279 CDEBUG(D_SUPER, "Mount %s complete\n",
1287 /* We can't call ll_fill_super by name because it lives in a module that
1288 must be loaded after this one. */
1289 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
1290 struct vfsmount *mnt))
1292 client_fill_super = cfs;
1294 EXPORT_SYMBOL(lustre_register_client_fill_super);
1296 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1298 kill_super_cb = cfs;
1300 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1302 /***************** FS registration ******************/
1303 #ifdef HAVE_FSTYPE_MOUNT
1304 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1305 const char *devname, void *data)
1307 struct lustre_mount_data2 lmd2 = { data, NULL };
1309 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
1312 int lustre_get_sb(struct file_system_type *fs_type, int flags,
1313 const char *devname, void * data, struct vfsmount *mnt)
1315 struct lustre_mount_data2 lmd2 = { data, mnt };
1317 return get_sb_nodev(fs_type, flags, &lmd2, lustre_fill_super, mnt);
1321 void lustre_kill_super(struct super_block *sb)
1323 struct lustre_sb_info *lsi = s2lsi(sb);
1325 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1326 (*kill_super_cb)(sb);
1328 kill_anon_super(sb);
1331 /** Register the "lustre" fs type
1333 struct file_system_type lustre_fs_type = {
1334 .owner = THIS_MODULE,
1336 #ifdef HAVE_FSTYPE_MOUNT
1337 .mount = lustre_mount,
1339 .get_sb = lustre_get_sb,
1341 .kill_sb = lustre_kill_super,
1342 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
1343 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
1346 int lustre_register_fs(void)
1348 return register_filesystem(&lustre_fs_type);
1351 int lustre_unregister_fs(void)
1353 return unregister_filesystem(&lustre_fs_type);