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 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
48 #include "../include/obd.h"
49 #include "../include/linux/lustre_compat25.h"
50 #include "../include/obd_class.h"
51 #include "../include/lustre/lustre_user.h"
52 #include "../include/lustre_log.h"
53 #include "../include/lustre_disk.h"
54 #include "../include/lustre_param.h"
56 static int (*client_fill_super)(struct super_block *sb,
57 struct vfsmount *mnt);
59 static void (*kill_super_cb)(struct super_block *sb);
61 /**************** config llog ********************/
63 /** Get a config log from the MGS and process it.
64 * This func is called for both clients and servers.
65 * Continue to process new statements appended to the logs
66 * (whenever the config lock is revoked) until lustre_end_log
68 * @param sb The superblock is used by the MGC to write to the local copy of
70 * @param logname The name of the llog to replicate from the MGS
71 * @param cfg Since the same mgc may be used to follow multiple config logs
72 * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
73 * this log, and is added to the mgc's list of logs to follow.
75 int lustre_process_log(struct super_block *sb, char *logname,
76 struct config_llog_instance *cfg)
78 struct lustre_cfg *lcfg;
79 struct lustre_cfg_bufs *bufs;
80 struct lustre_sb_info *lsi = s2lsi(sb);
81 struct obd_device *mgc = lsi->lsi_mgc;
91 /* mgc_process_config */
92 lustre_cfg_bufs_reset(bufs, mgc->obd_name);
93 lustre_cfg_bufs_set_string(bufs, 1, logname);
94 lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
95 lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
96 lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
97 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
98 lustre_cfg_free(lcfg);
103 LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s' failed from the MGS (%d). Make sure this client and the MGS are running compatible versions of Lustre.\n",
104 mgc->obd_name, logname, rc);
107 LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' failed (%d). This may be the result of communication errors between this node and the MGS, a bad configuration, or other errors. See the syslog for more information.\n",
108 mgc->obd_name, logname,
111 /* class_obd_list(); */
114 EXPORT_SYMBOL(lustre_process_log);
116 /* Stop watching this config log for updates */
117 int lustre_end_log(struct super_block *sb, char *logname,
118 struct config_llog_instance *cfg)
120 struct lustre_cfg *lcfg;
121 struct lustre_cfg_bufs bufs;
122 struct lustre_sb_info *lsi = s2lsi(sb);
123 struct obd_device *mgc = lsi->lsi_mgc;
129 /* mgc_process_config */
130 lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
131 lustre_cfg_bufs_set_string(&bufs, 1, logname);
133 lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
134 lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
135 rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
136 lustre_cfg_free(lcfg);
139 EXPORT_SYMBOL(lustre_end_log);
141 /**************** obd start *******************/
143 /** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
144 * lctl (and do for echo cli/srv.
146 int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
147 char *s1, char *s2, char *s3, char *s4)
149 struct lustre_cfg_bufs bufs;
150 struct lustre_cfg * lcfg = NULL;
153 CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
154 cmd, s1, s2, s3, s4);
156 lustre_cfg_bufs_reset(&bufs, cfgname);
158 lustre_cfg_bufs_set_string(&bufs, 1, s1);
160 lustre_cfg_bufs_set_string(&bufs, 2, s2);
162 lustre_cfg_bufs_set_string(&bufs, 3, s3);
164 lustre_cfg_bufs_set_string(&bufs, 4, s4);
166 lcfg = lustre_cfg_new(cmd, &bufs);
167 lcfg->lcfg_nid = nid;
168 rc = class_process_config(lcfg);
169 lustre_cfg_free(lcfg);
172 EXPORT_SYMBOL(do_lcfg);
174 /** Call class_attach and class_setup. These methods in turn call
175 * obd type-specific methods.
177 int lustre_start_simple(char *obdname, char *type, char *uuid,
178 char *s1, char *s2, char *s3, char *s4)
181 CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
183 rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
185 CERROR("%s attach error %d\n", obdname, rc);
188 rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
190 CERROR("%s setup error %d\n", obdname, rc);
191 do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
196 DEFINE_MUTEX(mgc_start_lock);
198 /** Set up a mgc obd to process startup logs
200 * \param sb [in] super block of the mgc obd
202 * \retval 0 success, otherwise error code
204 int lustre_start_mgc(struct super_block *sb)
206 struct obd_connect_data *data = NULL;
207 struct lustre_sb_info *lsi = s2lsi(sb);
208 struct obd_device *obd;
209 struct obd_export *exp;
210 struct obd_uuid *uuid;
213 char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
215 int rc = 0, i = 0, j, len;
217 LASSERT(lsi->lsi_lmd);
219 /* Find the first non-lo MGS nid for our MGC name */
220 if (IS_SERVER(lsi)) {
221 /* mount -o mgsnode=nid */
222 ptr = lsi->lsi_lmd->lmd_mgs;
223 if (lsi->lsi_lmd->lmd_mgs &&
224 (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
226 } else if (IS_MGS(lsi)) {
227 lnet_process_id_t id;
228 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
229 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
236 } else { /* client */
237 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
238 ptr = lsi->lsi_lmd->lmd_dev;
239 if (class_parse_nid(ptr, &nid, &ptr) == 0)
243 CERROR("No valid MGS nids found.\n");
247 mutex_lock(&mgc_start_lock);
249 len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
250 OBD_ALLOC(mgcname, len);
251 OBD_ALLOC(niduuid, len + 2);
252 if (!mgcname || !niduuid) {
256 sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
258 mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
266 obd = class_name2obd(mgcname);
267 if (obd && !obd->obd_stopping) {
270 rc = obd_set_info_async(NULL, obd->obd_self_export,
271 strlen(KEY_MGSSEC), KEY_MGSSEC,
272 strlen(mgssec), mgssec, NULL);
276 /* Re-using an existing MGC */
277 atomic_inc(&obd->u.cli.cl_mgc_refcount);
279 /* IR compatibility check, only for clients */
280 if (lmd_is_client(lsi->lsi_lmd)) {
282 int vallen = sizeof(*data);
283 __u32 *flags = &lsi->lsi_lmd->lmd_flags;
285 rc = obd_get_info(NULL, obd->obd_self_export,
286 strlen(KEY_CONN_DATA), KEY_CONN_DATA,
287 &vallen, data, NULL);
289 has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
290 if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
291 /* LMD_FLG_NOIR is for test purpose only */
293 "Trying to mount a client with IR setting not compatible with current mgc. Force to use current mgc setting that is IR %s.\n",
294 has_ir ? "enabled" : "disabled");
296 *flags &= ~LMD_FLG_NOIR;
298 *flags |= LMD_FLG_NOIR;
303 /* If we are restarting the MGS, don't try to keep the MGC's
304 old connection, or registration will fail. */
306 CDEBUG(D_MOUNT, "New MGS with live MGC\n");
310 /* Try all connections, but only once (again).
311 We don't want to block another target from starting
312 (using its local copy of the log), but we do want to connect
313 if at all possible. */
315 CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,
317 rc = obd_set_info_async(NULL, obd->obd_self_export,
318 sizeof(KEY_INIT_RECOV_BACKUP),
319 KEY_INIT_RECOV_BACKUP,
320 sizeof(recov_bk), &recov_bk, NULL);
325 CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
327 /* Add the primary nids for the MGS */
329 sprintf(niduuid, "%s_%x", mgcname, i);
330 if (IS_SERVER(lsi)) {
331 ptr = lsi->lsi_lmd->lmd_mgs;
333 /* Use local nids (including LO) */
334 lnet_process_id_t id;
335 while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
336 rc = do_lcfg(mgcname, id.nid,
337 LCFG_ADD_UUID, niduuid,
341 /* Use mgsnode= nids */
342 /* mount -o mgsnode=nid */
343 if (lsi->lsi_lmd->lmd_mgs) {
344 ptr = lsi->lsi_lmd->lmd_mgs;
345 } else if (class_find_param(ptr, PARAM_MGSNODE,
347 CERROR("No MGS nids given.\n");
351 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
352 rc = do_lcfg(mgcname, nid,
353 LCFG_ADD_UUID, niduuid,
358 } else { /* client */
359 /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
360 ptr = lsi->lsi_lmd->lmd_dev;
361 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
362 rc = do_lcfg(mgcname, nid,
363 LCFG_ADD_UUID, niduuid, NULL, NULL, NULL);
365 /* Stop at the first failover nid */
371 CERROR("No valid MGS nids found.\n");
375 lsi->lsi_lmd->lmd_mgs_failnodes = 1;
377 /* Random uuid for MGC allows easier reconnects */
384 ll_generate_random_uuid(uuidc);
385 class_uuid_unparse(uuidc, uuid);
388 rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
389 (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
390 niduuid, NULL, NULL);
395 /* Add any failover MGS nids */
397 while (ptr && ((*ptr == ':' ||
398 class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
399 /* New failover node */
400 sprintf(niduuid, "%s_%x", mgcname, i);
402 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
404 rc = do_lcfg(mgcname, nid,
405 LCFG_ADD_UUID, niduuid, NULL, NULL, NULL);
410 rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
411 niduuid, NULL, NULL, NULL);
418 lsi->lsi_lmd->lmd_mgs_failnodes = i;
420 obd = class_name2obd(mgcname);
422 CERROR("Can't find mgcobd %s\n", mgcname);
427 rc = obd_set_info_async(NULL, obd->obd_self_export,
428 strlen(KEY_MGSSEC), KEY_MGSSEC,
429 strlen(mgssec), mgssec, NULL);
433 /* Keep a refcount of servers/clients who started with "mount",
434 so we know when we can get rid of the mgc. */
435 atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
437 /* We connect to the MGS at setup, and don't disconnect until cleanup */
438 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
439 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
440 OBD_CONNECT_LVB_TYPE;
442 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
443 data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
445 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
448 if (lmd_is_client(lsi->lsi_lmd) &&
449 lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
450 data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
451 data->ocd_version = LUSTRE_VERSION_CODE;
452 rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
454 CERROR("connect failed %d\n", rc);
458 obd->u.cli.cl_mgc_mgsexp = exp;
461 /* Keep the mgc info in the sb. Note that many lsi's can point
465 mutex_unlock(&mgc_start_lock);
470 OBD_FREE(mgcname, len);
472 OBD_FREE(niduuid, len + 2);
476 static int lustre_stop_mgc(struct super_block *sb)
478 struct lustre_sb_info *lsi = s2lsi(sb);
479 struct obd_device *obd;
480 char *niduuid = NULL, *ptr = NULL;
481 int i, rc = 0, len = 0;
490 mutex_lock(&mgc_start_lock);
491 LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
492 if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
493 /* This is not fatal, every client that stops
494 will call in here. */
495 CDEBUG(D_MOUNT, "mgc still has %d references.\n",
496 atomic_read(&obd->u.cli.cl_mgc_refcount));
501 /* The MGC has no recoverable data in any case.
502 * force shutdown set in umount_begin */
503 obd->obd_no_recov = 1;
505 if (obd->u.cli.cl_mgc_mgsexp) {
506 /* An error is not fatal, if we are unable to send the
507 disconnect mgs ping evictor cleans up the export */
508 rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
510 CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
513 /* Save the obdname for cleaning the nid uuids, which are
515 len = strlen(obd->obd_name) + 6;
516 OBD_ALLOC(niduuid, len);
518 strcpy(niduuid, obd->obd_name);
519 ptr = niduuid + strlen(niduuid);
522 rc = class_manual_cleanup(obd);
526 /* Clean the nid uuids */
532 for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
533 sprintf(ptr, "_%x", i);
534 rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
535 niduuid, NULL, NULL, NULL);
537 CERROR("del MDC UUID %s failed: rc = %d\n",
542 OBD_FREE(niduuid, len);
544 /* class_import_put will get rid of the additional connections */
545 mutex_unlock(&mgc_start_lock);
549 /***************** lustre superblock **************/
551 struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
553 struct lustre_sb_info *lsi;
558 OBD_ALLOC_PTR(lsi->lsi_lmd);
564 lsi->lsi_lmd->lmd_exclude_count = 0;
565 lsi->lsi_lmd->lmd_recovery_time_soft = 0;
566 lsi->lsi_lmd->lmd_recovery_time_hard = 0;
567 s2lsi_nocast(sb) = lsi;
568 /* we take 1 extra ref for our setup */
569 atomic_set(&lsi->lsi_mounts, 1);
571 /* Default umount style */
572 lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
577 static int lustre_free_lsi(struct super_block *sb)
579 struct lustre_sb_info *lsi = s2lsi(sb);
581 LASSERT(lsi != NULL);
582 CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
584 /* someone didn't call server_put_mount. */
585 LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
587 if (lsi->lsi_lmd != NULL) {
588 if (lsi->lsi_lmd->lmd_dev != NULL)
589 OBD_FREE(lsi->lsi_lmd->lmd_dev,
590 strlen(lsi->lsi_lmd->lmd_dev) + 1);
591 if (lsi->lsi_lmd->lmd_profile != NULL)
592 OBD_FREE(lsi->lsi_lmd->lmd_profile,
593 strlen(lsi->lsi_lmd->lmd_profile) + 1);
594 if (lsi->lsi_lmd->lmd_mgssec != NULL)
595 OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
596 strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
597 if (lsi->lsi_lmd->lmd_opts != NULL)
598 OBD_FREE(lsi->lsi_lmd->lmd_opts,
599 strlen(lsi->lsi_lmd->lmd_opts) + 1);
600 if (lsi->lsi_lmd->lmd_exclude_count)
601 OBD_FREE(lsi->lsi_lmd->lmd_exclude,
602 sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
603 lsi->lsi_lmd->lmd_exclude_count);
604 if (lsi->lsi_lmd->lmd_mgs != NULL)
605 OBD_FREE(lsi->lsi_lmd->lmd_mgs,
606 strlen(lsi->lsi_lmd->lmd_mgs) + 1);
607 if (lsi->lsi_lmd->lmd_osd_type != NULL)
608 OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
609 strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
610 if (lsi->lsi_lmd->lmd_params != NULL)
611 OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
613 OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
616 LASSERT(lsi->lsi_llsbi == NULL);
617 OBD_FREE(lsi, sizeof(*lsi));
618 s2lsi_nocast(sb) = NULL;
623 /* The lsi has one reference for every server that is using the disk -
624 e.g. MDT, MGS, and potentially MGC */
625 int lustre_put_lsi(struct super_block *sb)
627 struct lustre_sb_info *lsi = s2lsi(sb);
629 LASSERT(lsi != NULL);
631 CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
632 if (atomic_dec_and_test(&lsi->lsi_mounts)) {
633 if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
634 lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
635 lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
636 lsi->lsi_dt_dev = NULL;
637 obd_disconnect(lsi->lsi_osd_exp);
638 /* wait till OSD is gone */
639 obd_zombie_barrier();
648 * <FSNAME><SEPARATOR><TYPE><INDEX>
649 * FSNAME is between 1 and 8 characters (inclusive).
650 * Excluded characters are '/' and ':'
651 * SEPARATOR is either ':' or '-'
652 * TYPE: "OST", "MDT", etc.
653 * INDEX: Hex representation of the index
656 /** Get the fsname ("lustre") from the server name ("lustre-OST003F").
657 * @param [in] svname server name including type and index
658 * @param [out] fsname Buffer to copy filesystem name prefix into.
659 * Must have at least 'strlen(fsname) + 1' chars.
660 * @param [out] endptr if endptr isn't NULL it is set to end of fsname
663 int server_name2fsname(const char *svname, char *fsname, const char **endptr)
667 dash = svname + strnlen(svname, 8); /* max fsname length is 8 */
668 for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
673 if (fsname != NULL) {
674 strncpy(fsname, svname, dash - svname);
675 fsname[dash - svname] = '\0';
683 EXPORT_SYMBOL(server_name2fsname);
686 * Get service name (svname) from string
688 * if endptr isn't NULL it is set to end of fsname *
690 int server_name2svname(const char *label, char *svname, const char **endptr,
696 /* We use server_name2fsname() just for parsing */
697 rc = server_name2fsname(label, NULL, &dash);
704 if (strlcpy(svname, dash + 1, svsize) >= svsize)
709 EXPORT_SYMBOL(server_name2svname);
712 /* Get the index from the obd name.
715 if endptr isn't NULL it is set to end of name */
716 int server_name2index(const char *svname, __u32 *idx, const char **endptr)
722 /* We use server_name2fsname() just for parsing */
723 rc = server_name2fsname(svname, NULL, &dash);
729 if (strncmp(dash, "MDT", 3) == 0)
730 rc = LDD_F_SV_TYPE_MDT;
731 else if (strncmp(dash, "OST", 3) == 0)
732 rc = LDD_F_SV_TYPE_OST;
738 if (strncmp(dash, "all", 3) == 0) {
741 return rc | LDD_F_SV_ALL;
744 index = simple_strtoul(dash, (char **)endptr, 16);
748 /* Account for -mdc after index that is possible when specifying mdt */
749 if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
750 sizeof(LUSTRE_MDC_NAME)-1) == 0)
751 *endptr += sizeof(LUSTRE_MDC_NAME);
755 EXPORT_SYMBOL(server_name2index);
757 /*************** mount common between server and client ***************/
760 int lustre_common_put_super(struct super_block *sb)
764 CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
766 /* Drop a ref to the MGC */
767 rc = lustre_stop_mgc(sb);
768 if (rc && (rc != -ENOENT)) {
770 CERROR("Can't stop MGC: %d\n", rc);
773 /* BUSY just means that there's some other obd that
774 needs the mgc. Let him clean it up. */
775 CDEBUG(D_MOUNT, "MGC still in use\n");
777 /* Drop a ref to the mounted disk */
782 EXPORT_SYMBOL(lustre_common_put_super);
784 static void lmd_print(struct lustre_mount_data *lmd)
788 PRINT_CMD(D_MOUNT, " mount data:\n");
789 if (lmd_is_client(lmd))
790 PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
791 PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
792 PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
795 PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
797 if (lmd->lmd_recovery_time_soft)
798 PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
799 lmd->lmd_recovery_time_soft);
801 if (lmd->lmd_recovery_time_hard)
802 PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
803 lmd->lmd_recovery_time_hard);
805 for (i = 0; i < lmd->lmd_exclude_count; i++) {
806 PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
807 lmd->lmd_exclude[i]);
811 /* Is this server on the exclusion list */
812 int lustre_check_exclusion(struct super_block *sb, char *svname)
814 struct lustre_sb_info *lsi = s2lsi(sb);
815 struct lustre_mount_data *lmd = lsi->lsi_lmd;
819 rc = server_name2index(svname, &index, NULL);
820 if (rc != LDD_F_SV_TYPE_OST)
821 /* Only exclude OSTs */
824 CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
825 index, lmd->lmd_exclude_count, lmd->lmd_dev);
827 for (i = 0; i < lmd->lmd_exclude_count; i++) {
828 if (index == lmd->lmd_exclude[i]) {
829 CWARN("Excluding %s (on exclusion list)\n", svname);
836 /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
837 static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
839 const char *s1 = ptr, *s2;
840 __u32 index, *exclude_list;
843 /* The shortest an ost name can be is 8 chars: -OST0000.
844 We don't actually know the fsname at this time, so in fact
845 a user could specify any fsname. */
846 devmax = strlen(ptr) / 8 + 1;
848 /* temp storage until we figure out how many we have */
849 OBD_ALLOC(exclude_list, sizeof(index) * devmax);
853 /* we enter this fn pointing at the '=' */
854 while (*s1 && *s1 != ' ' && *s1 != ',') {
856 rc = server_name2index(s1, &index, &s2);
858 CERROR("Can't parse server name '%s': rc = %d\n",
862 if (rc == LDD_F_SV_TYPE_OST)
863 exclude_list[lmd->lmd_exclude_count++] = index;
865 CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
866 (uint)(s2-s1), s1, rc);
868 /* now we are pointing at ':' (next exclude)
869 or ',' (end of excludes) */
870 if (lmd->lmd_exclude_count >= devmax)
873 if (rc >= 0) /* non-err */
876 if (lmd->lmd_exclude_count) {
877 /* permanent, freed in lustre_free_lsi */
878 OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
879 lmd->lmd_exclude_count);
880 if (lmd->lmd_exclude) {
881 memcpy(lmd->lmd_exclude, exclude_list,
882 sizeof(index) * lmd->lmd_exclude_count);
885 lmd->lmd_exclude_count = 0;
888 OBD_FREE(exclude_list, sizeof(index) * devmax);
892 static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
897 if (lmd->lmd_mgssec != NULL) {
898 OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
899 lmd->lmd_mgssec = NULL;
902 tail = strchr(ptr, ',');
904 length = strlen(ptr);
908 OBD_ALLOC(lmd->lmd_mgssec, length + 1);
909 if (lmd->lmd_mgssec == NULL)
912 memcpy(lmd->lmd_mgssec, ptr, length);
913 lmd->lmd_mgssec[length] = '\0';
917 static int lmd_parse_string(char **handle, char *ptr)
922 if ((handle == NULL) || (ptr == NULL))
925 if (*handle != NULL) {
926 OBD_FREE(*handle, strlen(*handle) + 1);
930 tail = strchr(ptr, ',');
932 length = strlen(ptr);
936 OBD_ALLOC(*handle, length + 1);
940 memcpy(*handle, ptr, length);
941 (*handle)[length] = '\0';
946 /* Collect multiple values for mgsnid specifiers */
947 static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
955 /* Find end of nidlist */
956 while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
957 length = tail - *ptr;
959 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
963 if (lmd->lmd_mgs != NULL)
964 oldlen = strlen(lmd->lmd_mgs) + 1;
966 OBD_ALLOC(mgsnid, oldlen + length + 1);
970 if (lmd->lmd_mgs != NULL) {
971 /* Multiple mgsnid= are taken to mean failover locations */
972 memcpy(mgsnid, lmd->lmd_mgs, oldlen);
973 mgsnid[oldlen - 1] = ':';
974 OBD_FREE(lmd->lmd_mgs, oldlen);
976 memcpy(mgsnid + oldlen, *ptr, length);
977 mgsnid[oldlen + length] = '\0';
978 lmd->lmd_mgs = mgsnid;
984 /** Parse mount line options
985 * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
986 * dev is passed as device=uml1:/lustre by mount.lustre
988 static int lmd_parse(char *options, struct lustre_mount_data *lmd)
990 char *s1, *s2, *devname = NULL;
991 struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
996 LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that /sbin/mount.lustre is installed.\n");
1000 /* Options should be a string - try to detect old lmd data */
1001 if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
1002 LCONSOLE_ERROR_MSG(0x163, "You're using an old version of /sbin/mount.lustre. Please install version %s\n",
1003 LUSTRE_VERSION_STRING);
1006 lmd->lmd_magic = LMD_MAGIC;
1008 OBD_ALLOC(lmd->lmd_params, 4096);
1009 if (lmd->lmd_params == NULL)
1011 lmd->lmd_params[0] = '\0';
1013 /* Set default flags here */
1018 int time_min = OBD_RECOVERY_TIME_MIN;
1020 /* Skip whitespace and extra commas */
1021 while (*s1 == ' ' || *s1 == ',')
1024 /* Client options are parsed in ll_options: eg. flock,
1027 /* Parse non-ldiskfs options here. Rather than modifying
1028 ldiskfs, we just zero these out here */
1029 if (strncmp(s1, "abort_recov", 11) == 0) {
1030 lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
1032 } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
1033 lmd->lmd_recovery_time_soft = max_t(int,
1034 simple_strtoul(s1 + 19, NULL, 10), time_min);
1036 } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
1037 lmd->lmd_recovery_time_hard = max_t(int,
1038 simple_strtoul(s1 + 19, NULL, 10), time_min);
1040 } else if (strncmp(s1, "noir", 4) == 0) {
1041 lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
1043 } else if (strncmp(s1, "nosvc", 5) == 0) {
1044 lmd->lmd_flags |= LMD_FLG_NOSVC;
1046 } else if (strncmp(s1, "nomgs", 5) == 0) {
1047 lmd->lmd_flags |= LMD_FLG_NOMGS;
1049 } else if (strncmp(s1, "noscrub", 7) == 0) {
1050 lmd->lmd_flags |= LMD_FLG_NOSCRUB;
1052 } else if (strncmp(s1, PARAM_MGSNODE,
1053 sizeof(PARAM_MGSNODE) - 1) == 0) {
1054 s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
1055 /* Assume the next mount opt is the first
1056 invalid nid we get to. */
1057 rc = lmd_parse_mgs(lmd, &s2);
1061 } else if (strncmp(s1, "writeconf", 9) == 0) {
1062 lmd->lmd_flags |= LMD_FLG_WRITECONF;
1064 } else if (strncmp(s1, "update", 6) == 0) {
1065 lmd->lmd_flags |= LMD_FLG_UPDATE;
1067 } else if (strncmp(s1, "virgin", 6) == 0) {
1068 lmd->lmd_flags |= LMD_FLG_VIRGIN;
1070 } else if (strncmp(s1, "noprimnode", 10) == 0) {
1071 lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
1073 } else if (strncmp(s1, "mgssec=", 7) == 0) {
1074 rc = lmd_parse_mgssec(lmd, s1 + 7);
1078 /* ost exclusion list */
1079 } else if (strncmp(s1, "exclude=", 8) == 0) {
1080 rc = lmd_make_exclusion(lmd, s1 + 7);
1084 } else if (strncmp(s1, "mgs", 3) == 0) {
1086 lmd->lmd_flags |= LMD_FLG_MGS;
1088 } else if (strncmp(s1, "svname=", 7) == 0) {
1089 rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
1093 } else if (strncmp(s1, "param=", 6) == 0) {
1095 char *tail = strchr(s1 + 6, ',');
1097 length = strlen(s1);
1101 strncat(lmd->lmd_params, s1 + 6, length);
1102 strcat(lmd->lmd_params, " ");
1104 } else if (strncmp(s1, "osd=", 4) == 0) {
1105 rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
1110 /* Linux 2.4 doesn't pass the device, so we stuck it at the
1111 end of the options. */
1112 else if (strncmp(s1, "device=", 7) == 0) {
1114 /* terminate options right before device. device
1115 must be the last one. */
1121 s2 = strchr(s1, ',');
1129 memmove(s1, s2, strlen(s2) + 1);
1135 LCONSOLE_ERROR_MSG(0x164, "Can't find the device name (need mount option 'device=...')\n");
1139 s1 = strstr(devname, ":/");
1142 lmd->lmd_flags |= LMD_FLG_CLIENT;
1143 /* Remove leading /s from fsname */
1144 while (*++s1 == '/') ;
1145 /* Freed in lustre_free_lsi */
1146 OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
1147 if (!lmd->lmd_profile)
1149 sprintf(lmd->lmd_profile, "%s-client", s1);
1152 /* Freed in lustre_free_lsi */
1153 OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
1156 strcpy(lmd->lmd_dev, devname);
1158 /* Save mount options */
1159 s1 = options + strlen(options) - 1;
1160 while (s1 >= options && (*s1 == ',' || *s1 == ' '))
1162 if (*options != 0) {
1163 /* Freed in lustre_free_lsi */
1164 OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
1167 strcpy(lmd->lmd_opts, options);
1171 lmd->lmd_magic = LMD_MAGIC;
1176 CERROR("Bad mount options %s\n", options);
1180 struct lustre_mount_data2 {
1182 struct vfsmount *lmd2_mnt;
1185 /** This is the entry point for the mount call into Lustre.
1186 * This is called when a server or client is mounted,
1187 * and this is where we start setting things up.
1188 * @param data Mount options (e.g. -o flock,abort_recov)
1190 int lustre_fill_super(struct super_block *sb, void *data, int silent)
1192 struct lustre_mount_data *lmd;
1193 struct lustre_mount_data2 *lmd2 = data;
1194 struct lustre_sb_info *lsi;
1197 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
1199 lsi = lustre_init_lsi(sb);
1205 * Disable lockdep during mount, because mount locking patterns are
1211 * LU-639: the obd cleanup of last mount may not finish yet, wait here.
1213 obd_zombie_barrier();
1215 /* Figure out the lmd from the mount options */
1216 if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
1222 if (lmd_is_client(lmd)) {
1223 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
1224 if (client_fill_super == NULL)
1225 request_module("lustre");
1226 if (client_fill_super == NULL) {
1227 LCONSOLE_ERROR_MSG(0x165, "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
1231 rc = lustre_start_mgc(sb);
1236 /* Connect and start */
1237 /* (should always be ll_fill_super) */
1238 rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
1239 /* c_f_s will call lustre_common_put_super on failure */
1242 CERROR("This is client-side-only module, cannot handle server mount.\n");
1246 /* If error happens in fill_super() call, @lsi will be killed there.
1247 * This is why we do not put it here. */
1251 CERROR("Unable to mount %s (%d)\n",
1252 s2lsi(sb) ? lmd->lmd_dev : "", rc);
1254 CDEBUG(D_SUPER, "Mount %s complete\n",
1262 /* We can't call ll_fill_super by name because it lives in a module that
1263 must be loaded after this one. */
1264 void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
1265 struct vfsmount *mnt))
1267 client_fill_super = cfs;
1269 EXPORT_SYMBOL(lustre_register_client_fill_super);
1271 void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
1273 kill_super_cb = cfs;
1275 EXPORT_SYMBOL(lustre_register_kill_super_cb);
1277 /***************** FS registration ******************/
1278 struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
1279 const char *devname, void *data)
1281 struct lustre_mount_data2 lmd2 = {
1286 return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
1289 static void lustre_kill_super(struct super_block *sb)
1291 struct lustre_sb_info *lsi = s2lsi(sb);
1293 if (kill_super_cb && lsi && !IS_SERVER(lsi))
1294 (*kill_super_cb)(sb);
1296 kill_anon_super(sb);
1299 /** Register the "lustre" fs type
1301 struct file_system_type lustre_fs_type = {
1302 .owner = THIS_MODULE,
1304 .mount = lustre_mount,
1305 .kill_sb = lustre_kill_super,
1306 .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
1307 FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
1309 MODULE_ALIAS_FS("lustre");
1311 int lustre_register_fs(void)
1313 return register_filesystem(&lustre_fs_type);
1316 int lustre_unregister_fs(void)
1318 return unregister_filesystem(&lustre_fs_type);