1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * load/unload driver, mount/dismount volumes
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
26 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/utsname.h>
32 #include <linux/init.h>
33 #include <linux/random.h>
34 #include <linux/statfs.h>
35 #include <linux/moduleparam.h>
36 #include <linux/blkdev.h>
37 #include <linux/socket.h>
38 #include <linux/inet.h>
39 #include <linux/parser.h>
40 #include <linux/crc32.h>
41 #include <linux/debugfs.h>
42 #include <linux/mount.h>
43 #include <linux/seq_file.h>
45 #define MLOG_MASK_PREFIX ML_SUPER
46 #include <cluster/masklog.h>
50 /* this should be the only file to include a version 1 header */
51 #include "ocfs1_fs_compat.h"
56 #include "extent_map.h"
57 #include "heartbeat.h"
60 #include "localalloc.h"
69 #include "buffer_head_io.h"
71 static struct kmem_cache *ocfs2_inode_cachep = NULL;
73 /* OCFS2 needs to schedule several differnt types of work which
74 * require cluster locking, disk I/O, recovery waits, etc. Since these
75 * types of work tend to be heavy we avoid using the kernel events
76 * workqueue and schedule on our own. */
77 struct workqueue_struct *ocfs2_wq = NULL;
79 static struct dentry *ocfs2_debugfs_root = NULL;
81 MODULE_AUTHOR("Oracle");
82 MODULE_LICENSE("GPL");
86 unsigned long commit_interval;
87 unsigned long mount_opt;
88 unsigned int atime_quantum;
90 unsigned int localalloc_opt;
91 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
94 static int ocfs2_parse_options(struct super_block *sb, char *options,
95 struct mount_options *mopt,
97 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
98 static void ocfs2_put_super(struct super_block *sb);
99 static int ocfs2_mount_volume(struct super_block *sb);
100 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
101 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
102 static int ocfs2_initialize_mem_caches(void);
103 static void ocfs2_free_mem_caches(void);
104 static void ocfs2_delete_osb(struct ocfs2_super *osb);
106 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
108 static int ocfs2_sync_fs(struct super_block *sb, int wait);
110 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
111 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
112 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
113 static int ocfs2_check_volume(struct ocfs2_super *osb);
114 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
115 struct buffer_head *bh,
117 static int ocfs2_initialize_super(struct super_block *sb,
118 struct buffer_head *bh,
120 static int ocfs2_get_sector(struct super_block *sb,
121 struct buffer_head **bh,
124 static void ocfs2_write_super(struct super_block *sb);
125 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
126 static void ocfs2_destroy_inode(struct inode *inode);
128 static const struct super_operations ocfs2_sops = {
129 .statfs = ocfs2_statfs,
130 .alloc_inode = ocfs2_alloc_inode,
131 .destroy_inode = ocfs2_destroy_inode,
132 .drop_inode = ocfs2_drop_inode,
133 .clear_inode = ocfs2_clear_inode,
134 .delete_inode = ocfs2_delete_inode,
135 .sync_fs = ocfs2_sync_fs,
136 .write_super = ocfs2_write_super,
137 .put_super = ocfs2_put_super,
138 .remount_fs = ocfs2_remount,
139 .show_options = ocfs2_show_options,
163 static const match_table_t tokens = {
164 {Opt_barrier, "barrier=%u"},
165 {Opt_err_panic, "errors=panic"},
166 {Opt_err_ro, "errors=remount-ro"},
168 {Opt_nointr, "nointr"},
169 {Opt_hb_none, OCFS2_HB_NONE},
170 {Opt_hb_local, OCFS2_HB_LOCAL},
171 {Opt_data_ordered, "data=ordered"},
172 {Opt_data_writeback, "data=writeback"},
173 {Opt_atime_quantum, "atime_quantum=%u"},
174 {Opt_slot, "preferred_slot=%u"},
175 {Opt_commit, "commit=%u"},
176 {Opt_localalloc, "localalloc=%d"},
177 {Opt_localflocks, "localflocks"},
178 {Opt_stack, "cluster_stack=%s"},
179 {Opt_user_xattr, "user_xattr"},
180 {Opt_nouser_xattr, "nouser_xattr"},
185 * write_super and sync_fs ripped right out of ext3.
187 static void ocfs2_write_super(struct super_block *sb)
189 if (mutex_trylock(&sb->s_lock) != 0)
194 static int ocfs2_sync_fs(struct super_block *sb, int wait)
198 struct ocfs2_super *osb = OCFS2_SB(sb);
202 if (ocfs2_is_hard_readonly(osb))
206 status = ocfs2_flush_truncate_log(osb);
210 ocfs2_schedule_truncate_log_flush(osb, 0);
213 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
215 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
221 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
223 struct inode *new = NULL;
229 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
231 status = PTR_ERR(new);
235 osb->root_inode = new;
237 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
239 status = PTR_ERR(new);
243 osb->sys_root_inode = new;
245 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
246 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
247 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
249 ocfs2_release_system_inodes(osb);
252 /* FIXME: Should ERROR_RO_FS */
253 mlog(ML_ERROR, "Unable to load system inode %d, "
254 "possibly corrupt fs?", i);
257 // the array now has one ref, so drop this one
266 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
268 struct inode *new = NULL;
274 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
275 i < NUM_SYSTEM_INODES;
277 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
279 ocfs2_release_system_inodes(osb);
281 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
282 status, i, osb->slot_num);
285 /* the array now has one ref, so drop this one */
294 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
301 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
302 inode = osb->system_inodes[i];
305 osb->system_inodes[i] = NULL;
309 inode = osb->sys_root_inode;
312 osb->sys_root_inode = NULL;
315 inode = osb->root_inode;
318 osb->root_inode = NULL;
324 /* We're allocating fs objects, use GFP_NOFS */
325 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
327 struct ocfs2_inode_info *oi;
329 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
333 return &oi->vfs_inode;
336 static void ocfs2_destroy_inode(struct inode *inode)
338 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
341 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
344 unsigned int bytes = 1 << cbits;
345 unsigned int trim = bytes;
346 unsigned int bitshift = 32;
349 * i_size and all block offsets in ocfs2 are always 64 bits
350 * wide. i_clusters is 32 bits, in cluster-sized units. So on
351 * 64 bit platforms, cluster size will be the limiting factor.
354 #if BITS_PER_LONG == 32
355 # if defined(CONFIG_LBD)
356 BUILD_BUG_ON(sizeof(sector_t) != 8);
358 * We might be limited by page cache size.
360 if (bytes > PAGE_CACHE_SIZE) {
361 bytes = PAGE_CACHE_SIZE;
364 * Shift by 31 here so that we don't get larger than
371 * We are limited by the size of sector_t. Use block size, as
372 * that's what we expose to the VFS.
381 * Trim by a whole cluster when we can actually approach the
382 * on-disk limits. Otherwise we can overflow i_clusters when
383 * an extent start is at the max offset.
385 return (((unsigned long long)bytes) << bitshift) - trim;
388 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
390 int incompat_features;
392 struct mount_options parsed_options;
393 struct ocfs2_super *osb = OCFS2_SB(sb);
395 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
400 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
401 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
403 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
407 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
408 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
410 mlog(ML_ERROR, "Cannot change data mode on remount\n");
414 /* We're going to/from readonly mode. */
415 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
416 /* Lock here so the check of HARD_RO and the potential
417 * setting of SOFT_RO is atomic. */
418 spin_lock(&osb->osb_lock);
419 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
420 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
425 if (*flags & MS_RDONLY) {
426 mlog(0, "Going to ro mode.\n");
427 sb->s_flags |= MS_RDONLY;
428 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
430 mlog(0, "Making ro filesystem writeable.\n");
432 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
433 mlog(ML_ERROR, "Cannot remount RDWR "
434 "filesystem due to previous errors.\n");
438 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
439 if (incompat_features) {
440 mlog(ML_ERROR, "Cannot remount RDWR because "
441 "of unsupported optional features "
442 "(%x).\n", incompat_features);
446 sb->s_flags &= ~MS_RDONLY;
447 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
450 spin_unlock(&osb->osb_lock);
454 /* Only save off the new mount options in case of a successful
456 osb->s_mount_opt = parsed_options.mount_opt;
457 osb->s_atime_quantum = parsed_options.atime_quantum;
458 osb->preferred_slot = parsed_options.slot;
459 if (parsed_options.commit_interval)
460 osb->osb_commit_interval = parsed_options.commit_interval;
462 if (!ocfs2_is_hard_readonly(osb))
463 ocfs2_set_journal_params(osb);
469 static int ocfs2_sb_probe(struct super_block *sb,
470 struct buffer_head **bh,
474 struct ocfs1_vol_disk_hdr *hdr;
475 struct ocfs2_dinode *di;
481 *sector_size = bdev_hardsect_size(sb->s_bdev);
482 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
483 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
484 *sector_size, OCFS2_MAX_BLOCKSIZE);
489 /* Can this really happen? */
490 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
491 *sector_size = OCFS2_MIN_BLOCKSIZE;
493 /* check block zero for old format */
494 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
499 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
500 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
501 mlog(ML_ERROR, "incompatible version: %u.%u\n",
502 hdr->major_version, hdr->minor_version);
505 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
506 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
507 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
514 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
515 "upgraded before mounting with ocfs v2\n");
520 * Now check at magic offset for 512, 1024, 2048, 4096
521 * blocksizes. 4096 is the maximum blocksize because it is
522 * the minimum clustersize.
525 for (blksize = *sector_size;
526 blksize <= OCFS2_MAX_BLOCKSIZE;
528 tmpstat = ocfs2_get_sector(sb, bh,
529 OCFS2_SUPER_BLOCK_BLKNO,
536 di = (struct ocfs2_dinode *) (*bh)->b_data;
537 status = ocfs2_verify_volume(di, *bh, blksize);
542 if (status != -EAGAIN)
550 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
552 if (ocfs2_mount_local(osb)) {
553 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
554 mlog(ML_ERROR, "Cannot heartbeat on a locally "
555 "mounted device.\n");
560 if (ocfs2_userspace_stack(osb)) {
561 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
562 mlog(ML_ERROR, "Userspace stack expected, but "
563 "o2cb heartbeat arguments passed to mount\n");
568 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
569 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
570 !ocfs2_userspace_stack(osb)) {
571 mlog(ML_ERROR, "Heartbeat has to be started to mount "
572 "a read-write clustered device.\n");
581 * If we're using a userspace stack, mount should have passed
582 * a name that matches the disk. If not, mount should not
583 * have passed a stack.
585 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
586 struct mount_options *mopt)
588 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
590 "cluster stack passed to mount, but this filesystem "
591 "does not support it\n");
595 if (ocfs2_userspace_stack(osb) &&
596 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
597 OCFS2_STACK_LABEL_LEN)) {
599 "cluster stack passed to mount (\"%s\") does not "
600 "match the filesystem (\"%s\")\n",
602 osb->osb_cluster_stack);
609 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
612 int status, sector_size;
613 struct mount_options parsed_options;
614 struct inode *inode = NULL;
615 struct ocfs2_super *osb = NULL;
616 struct buffer_head *bh = NULL;
619 mlog_entry("%p, %p, %i", sb, data, silent);
621 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
623 goto read_super_error;
626 /* probe for superblock */
627 status = ocfs2_sb_probe(sb, &bh, §or_size);
629 mlog(ML_ERROR, "superblock probe failed!\n");
630 goto read_super_error;
633 status = ocfs2_initialize_super(sb, bh, sector_size);
637 goto read_super_error;
641 osb->s_mount_opt = parsed_options.mount_opt;
642 osb->s_atime_quantum = parsed_options.atime_quantum;
643 osb->preferred_slot = parsed_options.slot;
644 osb->osb_commit_interval = parsed_options.commit_interval;
645 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
646 osb->local_alloc_bits = osb->local_alloc_default_bits;
648 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
650 goto read_super_error;
652 sb->s_magic = OCFS2_SUPER_MAGIC;
654 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
656 if (bdev_read_only(sb->s_bdev)) {
657 if (!(sb->s_flags & MS_RDONLY)) {
659 mlog(ML_ERROR, "Readonly device detected but readonly "
660 "mount was not specified.\n");
661 goto read_super_error;
664 /* You should not be able to start a local heartbeat
665 * on a readonly device. */
666 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
668 mlog(ML_ERROR, "Local heartbeat specified on readonly "
670 goto read_super_error;
673 status = ocfs2_check_journals_nolocks(osb);
675 if (status == -EROFS)
676 mlog(ML_ERROR, "Recovery required on readonly "
677 "file system, but write access is "
681 goto read_super_error;
684 ocfs2_set_ro_flag(osb, 1);
686 printk(KERN_NOTICE "Readonly device detected. No cluster "
687 "services will be utilized for this mount. Recovery "
688 "will be skipped.\n");
691 if (!ocfs2_is_hard_readonly(osb)) {
692 if (sb->s_flags & MS_RDONLY)
693 ocfs2_set_ro_flag(osb, 0);
696 status = ocfs2_verify_heartbeat(osb);
699 goto read_super_error;
702 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
704 if (!osb->osb_debug_root) {
706 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
707 goto read_super_error;
710 status = ocfs2_mount_volume(sb);
712 inode = igrab(osb->root_inode);
715 goto read_super_error;
720 goto read_super_error;
723 root = d_alloc_root(inode);
727 goto read_super_error;
732 ocfs2_complete_mount_recovery(osb);
734 if (ocfs2_mount_local(osb))
735 snprintf(nodestr, sizeof(nodestr), "local");
737 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
739 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
740 "with %s data mode.\n",
741 osb->dev_str, nodestr, osb->slot_num,
742 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
745 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
746 wake_up(&osb->osb_mount_event);
759 atomic_set(&osb->vol_state, VOLUME_DISABLED);
760 wake_up(&osb->osb_mount_event);
761 ocfs2_dismount_volume(sb, 1);
768 static int ocfs2_get_sb(struct file_system_type *fs_type,
770 const char *dev_name,
772 struct vfsmount *mnt)
774 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
778 static struct file_system_type ocfs2_fs_type = {
779 .owner = THIS_MODULE,
781 .get_sb = ocfs2_get_sb, /* is this called when we mount
783 .kill_sb = kill_block_super, /* set to the generic one
784 * right now, but do we
785 * need to change that? */
786 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
790 static int ocfs2_parse_options(struct super_block *sb,
792 struct mount_options *mopt,
798 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
799 options ? options : "(none)");
801 mopt->commit_interval = 0;
803 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
804 mopt->slot = OCFS2_INVALID_SLOT;
805 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
806 mopt->cluster_stack[0] = '\0';
813 while ((p = strsep(&options, ",")) != NULL) {
815 substring_t args[MAX_OPT_ARGS];
820 token = match_token(p, tokens, args);
823 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
826 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
829 if (match_int(&args[0], &option)) {
834 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
836 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
839 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
842 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
845 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
848 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
850 case Opt_data_ordered:
851 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
853 case Opt_data_writeback:
854 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
857 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
859 case Opt_nouser_xattr:
860 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
862 case Opt_atime_quantum:
863 if (match_int(&args[0], &option)) {
868 mopt->atime_quantum = option;
872 if (match_int(&args[0], &option)) {
877 mopt->slot = (s16)option;
881 if (match_int(&args[0], &option)) {
888 option = JBD_DEFAULT_MAX_COMMIT_AGE;
889 mopt->commit_interval = HZ * option;
893 if (match_int(&args[0], &option)) {
897 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
898 mopt->localalloc_opt = option;
900 case Opt_localflocks:
902 * Changing this during remount could race
903 * flock() requests, or "unbalance" existing
904 * ones (e.g., a lock is taken in one mode but
905 * dropped in the other). If users care enough
906 * to flip locking modes during remount, we
907 * could add a "local" flag to individual
908 * flock structures for proper tracking of
912 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
915 /* Check both that the option we were passed
916 * is of the right length and that it is a proper
917 * string of the right length.
919 if (((args[0].to - args[0].from) !=
920 OCFS2_STACK_LABEL_LEN) ||
921 (strnlen(args[0].from,
922 OCFS2_STACK_LABEL_LEN) !=
923 OCFS2_STACK_LABEL_LEN)) {
925 "Invalid cluster_stack option\n");
929 memcpy(mopt->cluster_stack, args[0].from,
930 OCFS2_STACK_LABEL_LEN);
931 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
935 "Unrecognized mount option \"%s\" "
936 "or missing value\n", p);
949 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
951 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
952 unsigned long opts = osb->s_mount_opt;
953 unsigned int local_alloc_megs;
955 if (opts & OCFS2_MOUNT_HB_LOCAL)
956 seq_printf(s, ",_netdev,heartbeat=local");
958 seq_printf(s, ",heartbeat=none");
960 if (opts & OCFS2_MOUNT_NOINTR)
961 seq_printf(s, ",nointr");
963 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
964 seq_printf(s, ",data=writeback");
966 seq_printf(s, ",data=ordered");
968 if (opts & OCFS2_MOUNT_BARRIER)
969 seq_printf(s, ",barrier=1");
971 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
972 seq_printf(s, ",errors=panic");
974 seq_printf(s, ",errors=remount-ro");
976 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
977 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
979 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
980 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
982 if (osb->osb_commit_interval)
983 seq_printf(s, ",commit=%u",
984 (unsigned) (osb->osb_commit_interval / HZ));
986 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
987 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
988 seq_printf(s, ",localalloc=%d", local_alloc_megs);
990 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
991 seq_printf(s, ",localflocks,");
993 if (osb->osb_cluster_stack[0])
994 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
995 osb->osb_cluster_stack);
1000 static int __init ocfs2_init(void)
1006 ocfs2_print_version();
1008 status = init_ocfs2_uptodate_cache();
1014 status = ocfs2_initialize_mem_caches();
1020 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1026 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1027 if (!ocfs2_debugfs_root) {
1029 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1032 ocfs2_set_locking_protocol();
1036 ocfs2_free_mem_caches();
1037 exit_ocfs2_uptodate_cache();
1043 return register_filesystem(&ocfs2_fs_type);
1048 static void __exit ocfs2_exit(void)
1053 flush_workqueue(ocfs2_wq);
1054 destroy_workqueue(ocfs2_wq);
1057 debugfs_remove(ocfs2_debugfs_root);
1059 ocfs2_free_mem_caches();
1061 unregister_filesystem(&ocfs2_fs_type);
1063 exit_ocfs2_uptodate_cache();
1068 static void ocfs2_put_super(struct super_block *sb)
1070 mlog_entry("(0x%p)\n", sb);
1072 ocfs2_sync_blockdev(sb);
1073 ocfs2_dismount_volume(sb, 0);
1078 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1080 struct ocfs2_super *osb;
1081 u32 numbits, freebits;
1083 struct ocfs2_dinode *bm_lock;
1084 struct buffer_head *bh = NULL;
1085 struct inode *inode = NULL;
1087 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1089 osb = OCFS2_SB(dentry->d_sb);
1091 inode = ocfs2_get_system_file_inode(osb,
1092 GLOBAL_BITMAP_SYSTEM_INODE,
1093 OCFS2_INVALID_SLOT);
1095 mlog(ML_ERROR, "failed to get bitmap inode\n");
1100 status = ocfs2_inode_lock(inode, &bh, 0);
1106 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1108 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1109 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1111 buf->f_type = OCFS2_SUPER_MAGIC;
1112 buf->f_bsize = dentry->d_sb->s_blocksize;
1113 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1114 buf->f_blocks = ((sector_t) numbits) *
1115 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1116 buf->f_bfree = ((sector_t) freebits) *
1117 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1118 buf->f_bavail = buf->f_bfree;
1119 buf->f_files = numbits;
1120 buf->f_ffree = freebits;
1124 ocfs2_inode_unlock(inode, 0);
1135 static void ocfs2_inode_init_once(void *data)
1137 struct ocfs2_inode_info *oi = data;
1140 oi->ip_open_count = 0;
1141 spin_lock_init(&oi->ip_lock);
1142 ocfs2_extent_map_init(&oi->vfs_inode);
1143 INIT_LIST_HEAD(&oi->ip_io_markers);
1144 oi->ip_created_trans = 0;
1145 oi->ip_last_trans = 0;
1146 oi->ip_dir_start_lookup = 0;
1148 init_rwsem(&oi->ip_alloc_sem);
1149 init_rwsem(&oi->ip_xattr_sem);
1150 mutex_init(&oi->ip_io_mutex);
1152 oi->ip_blkno = 0ULL;
1153 oi->ip_clusters = 0;
1155 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1156 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1157 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1159 ocfs2_metadata_cache_init(&oi->vfs_inode);
1161 inode_init_once(&oi->vfs_inode);
1164 static int ocfs2_initialize_mem_caches(void)
1166 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1167 sizeof(struct ocfs2_inode_info),
1169 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1171 ocfs2_inode_init_once);
1172 if (!ocfs2_inode_cachep)
1178 static void ocfs2_free_mem_caches(void)
1180 if (ocfs2_inode_cachep)
1181 kmem_cache_destroy(ocfs2_inode_cachep);
1183 ocfs2_inode_cachep = NULL;
1186 static int ocfs2_get_sector(struct super_block *sb,
1187 struct buffer_head **bh,
1191 if (!sb_set_blocksize(sb, sect_size)) {
1192 mlog(ML_ERROR, "unable to set blocksize\n");
1196 *bh = sb_getblk(sb, block);
1202 if (!buffer_dirty(*bh))
1203 clear_buffer_uptodate(*bh);
1205 ll_rw_block(READ, 1, bh);
1206 wait_on_buffer(*bh);
1210 static int ocfs2_mount_volume(struct super_block *sb)
1213 int unlock_super = 0;
1214 struct ocfs2_super *osb = OCFS2_SB(sb);
1218 if (ocfs2_is_hard_readonly(osb))
1221 status = ocfs2_dlm_init(osb);
1227 status = ocfs2_super_lock(osb, 1);
1234 /* This will load up the node map and add ourselves to it. */
1235 status = ocfs2_find_slot(osb);
1241 /* load all node-local system inodes */
1242 status = ocfs2_init_local_system_inodes(osb);
1248 status = ocfs2_check_volume(osb);
1254 status = ocfs2_truncate_log_init(osb);
1260 if (ocfs2_mount_local(osb))
1265 ocfs2_super_unlock(osb, 1);
1271 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1273 int tmp, hangup_needed = 0;
1274 struct ocfs2_super *osb = NULL;
1277 mlog_entry("(0x%p)\n", sb);
1283 ocfs2_shutdown_local_alloc(osb);
1285 ocfs2_truncate_log_shutdown(osb);
1287 /* This will disable recovery and flush any recovery work. */
1288 ocfs2_recovery_exit(osb);
1290 ocfs2_journal_shutdown(osb);
1292 ocfs2_sync_blockdev(sb);
1294 /* No cluster connection means we've failed during mount, so skip
1295 * all the steps which depended on that to complete. */
1297 tmp = ocfs2_super_lock(osb, 1);
1304 if (osb->slot_num != OCFS2_INVALID_SLOT)
1305 ocfs2_put_slot(osb);
1308 ocfs2_super_unlock(osb, 1);
1310 ocfs2_release_system_inodes(osb);
1313 * If we're dismounting due to mount error, mount.ocfs2 will clean
1314 * up heartbeat. If we're a local mount, there is no heartbeat.
1315 * If we failed before we got a uuid_str yet, we can't stop
1316 * heartbeat. Otherwise, do it.
1318 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1322 ocfs2_dlm_shutdown(osb, hangup_needed);
1324 debugfs_remove(osb->osb_debug_root);
1327 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1329 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1331 if (ocfs2_mount_local(osb))
1332 snprintf(nodestr, sizeof(nodestr), "local");
1334 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1336 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1337 osb->dev_str, nodestr);
1339 ocfs2_delete_osb(osb);
1342 sb->s_fs_info = NULL;
1345 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1346 unsigned uuid_bytes)
1351 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1353 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1354 if (osb->uuid_str == NULL)
1357 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1358 /* print with null */
1359 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1360 if (ret != 2) /* drop super cleans up */
1362 /* then only advance past the last char */
1369 static int ocfs2_initialize_super(struct super_block *sb,
1370 struct buffer_head *bh,
1374 int i, cbits, bbits;
1375 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1376 struct inode *inode = NULL;
1377 struct ocfs2_journal *journal;
1378 __le32 uuid_net_key;
1379 struct ocfs2_super *osb;
1383 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1390 sb->s_fs_info = osb;
1391 sb->s_op = &ocfs2_sops;
1392 sb->s_export_op = &ocfs2_export_ops;
1393 sb->s_xattr = ocfs2_xattr_handlers;
1394 sb->s_time_gran = 1;
1395 sb->s_flags |= MS_NOATIME;
1396 /* this is needed to support O_LARGEFILE */
1397 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1398 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1399 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1402 /* Save off for ocfs2_rw_direct */
1403 osb->s_sectsize_bits = blksize_bits(sector_size);
1404 BUG_ON(!osb->s_sectsize_bits);
1406 spin_lock_init(&osb->dc_task_lock);
1407 init_waitqueue_head(&osb->dc_event);
1408 osb->dc_work_sequence = 0;
1409 osb->dc_wake_sequence = 0;
1410 INIT_LIST_HEAD(&osb->blocked_lock_list);
1411 osb->blocked_lock_count = 0;
1412 spin_lock_init(&osb->osb_lock);
1413 ocfs2_init_inode_steal_slot(osb);
1415 atomic_set(&osb->alloc_stats.moves, 0);
1416 atomic_set(&osb->alloc_stats.local_data, 0);
1417 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1418 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1419 atomic_set(&osb->alloc_stats.bg_extends, 0);
1421 ocfs2_init_node_maps(osb);
1423 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1424 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1426 status = ocfs2_recovery_init(osb);
1428 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1433 init_waitqueue_head(&osb->checkpoint_event);
1434 atomic_set(&osb->needs_checkpoint, 0);
1436 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1438 osb->slot_num = OCFS2_INVALID_SLOT;
1440 osb->s_xattr_inline_size = le16_to_cpu(
1441 di->id2.i_super.s_xattr_inline_size);
1443 osb->local_alloc_state = OCFS2_LA_UNUSED;
1444 osb->local_alloc_bh = NULL;
1445 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
1447 init_waitqueue_head(&osb->osb_mount_event);
1449 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1450 if (!osb->vol_label) {
1451 mlog(ML_ERROR, "unable to alloc vol label\n");
1456 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1457 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1458 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1463 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1465 osb->slot_recovery_generations =
1466 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1468 if (!osb->slot_recovery_generations) {
1474 init_waitqueue_head(&osb->osb_wipe_event);
1475 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1476 sizeof(*osb->osb_orphan_wipes),
1478 if (!osb->osb_orphan_wipes) {
1484 osb->s_feature_compat =
1485 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1486 osb->s_feature_ro_compat =
1487 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1488 osb->s_feature_incompat =
1489 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1491 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1492 mlog(ML_ERROR, "couldn't mount because of unsupported "
1493 "optional features (%x).\n", i);
1497 if (!(osb->sb->s_flags & MS_RDONLY) &&
1498 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1499 mlog(ML_ERROR, "couldn't mount RDWR because of "
1500 "unsupported optional features (%x).\n", i);
1505 if (ocfs2_userspace_stack(osb)) {
1506 memcpy(osb->osb_cluster_stack,
1507 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1508 OCFS2_STACK_LABEL_LEN);
1509 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1510 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1512 "couldn't mount because of an invalid "
1513 "cluster stack label (%s) \n",
1514 osb->osb_cluster_stack);
1519 /* The empty string is identical with classic tools that
1520 * don't know about s_cluster_info. */
1521 osb->osb_cluster_stack[0] = '\0';
1524 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1527 * This should be done in ocfs2_journal_init(), but unknown
1528 * ordering issues will cause the filesystem to crash.
1529 * If anyone wants to figure out what part of the code
1530 * refers to osb->journal before ocfs2_journal_init() is run,
1533 /* initialize our journal structure */
1535 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1537 mlog(ML_ERROR, "unable to alloc journal\n");
1541 osb->journal = journal;
1542 journal->j_osb = osb;
1544 atomic_set(&journal->j_num_trans, 0);
1545 init_rwsem(&journal->j_trans_barrier);
1546 init_waitqueue_head(&journal->j_checkpointed);
1547 spin_lock_init(&journal->j_lock);
1548 journal->j_trans_id = (unsigned long) 1;
1549 INIT_LIST_HEAD(&journal->j_la_cleanups);
1550 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1551 journal->j_state = OCFS2_JOURNAL_FREE;
1553 /* get some pseudo constants for clustersize bits */
1554 osb->s_clustersize_bits =
1555 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1556 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1557 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1559 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1560 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1561 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1562 osb->s_clustersize);
1567 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1569 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1570 "what jbd can address in 32 bits.\n");
1575 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1576 sizeof(di->id2.i_super.s_uuid))) {
1577 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1582 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1584 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1585 osb->vol_label[63] = '\0';
1586 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1587 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1588 osb->first_cluster_group_blkno =
1589 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1590 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1591 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1592 mlog(0, "vol_label: %s\n", osb->vol_label);
1593 mlog(0, "uuid: %s\n", osb->uuid_str);
1594 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1595 (unsigned long long)osb->root_blkno,
1596 (unsigned long long)osb->system_dir_blkno);
1598 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1599 if (!osb->osb_dlm_debug) {
1605 atomic_set(&osb->vol_state, VOLUME_INIT);
1607 /* load root, system_dir, and all global system inodes */
1608 status = ocfs2_init_global_system_inodes(osb);
1617 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1618 OCFS2_INVALID_SLOT);
1625 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1628 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
1630 status = ocfs2_init_slot_info(osb);
1642 * will return: -EAGAIN if it is ok to keep searching for superblocks
1643 * -EINVAL if there is a bad superblock
1646 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1647 struct buffer_head *bh,
1650 int status = -EAGAIN;
1654 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1655 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1657 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1658 mlog(ML_ERROR, "found superblock with incorrect block "
1659 "size: found %u, should be %u\n",
1660 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1662 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1663 OCFS2_MAJOR_REV_LEVEL ||
1664 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1665 OCFS2_MINOR_REV_LEVEL) {
1666 mlog(ML_ERROR, "found superblock with bad version: "
1667 "found %u.%u, should be %u.%u\n",
1668 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1669 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1670 OCFS2_MAJOR_REV_LEVEL,
1671 OCFS2_MINOR_REV_LEVEL);
1672 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1673 mlog(ML_ERROR, "bad block number on superblock: "
1674 "found %llu, should be %llu\n",
1675 (unsigned long long)le64_to_cpu(di->i_blkno),
1676 (unsigned long long)bh->b_blocknr);
1677 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1678 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1679 mlog(ML_ERROR, "bad cluster size found: %u\n",
1680 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1681 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1682 mlog(ML_ERROR, "bad root_blkno: 0\n");
1683 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1684 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1685 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1687 "Superblock slots found greater than file system "
1688 "maximum: found %u, max %u\n",
1689 le16_to_cpu(di->id2.i_super.s_max_slots),
1701 static int ocfs2_check_volume(struct ocfs2_super *osb)
1706 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1712 /* Init our journal object. */
1713 status = ocfs2_journal_init(osb->journal, &dirty);
1715 mlog(ML_ERROR, "Could not initialize journal!\n");
1719 /* If the journal was unmounted cleanly then we don't want to
1720 * recover anything. Otherwise, journal_load will do that
1721 * dirty work for us :) */
1723 status = ocfs2_journal_wipe(osb->journal, 0);
1729 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1730 "recovering volume.\n");
1733 local = ocfs2_mount_local(osb);
1735 /* will play back anything left in the journal. */
1736 status = ocfs2_journal_load(osb->journal, local, dirty);
1738 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
1743 /* recover my local alloc if we didn't unmount cleanly. */
1744 status = ocfs2_begin_local_alloc_recovery(osb,
1751 /* we complete the recovery process after we've marked
1752 * ourselves as mounted. */
1755 mlog(0, "Journal loaded.\n");
1757 status = ocfs2_load_local_alloc(osb);
1764 /* Recovery will be completed after we've mounted the
1765 * rest of the volume. */
1767 osb->local_alloc_copy = local_alloc;
1771 /* go through each journal, trylock it and if you get the
1772 * lock, and it's marked as dirty, set the bit in the recover
1773 * map and launch a recovery thread for it. */
1774 status = ocfs2_mark_dead_nodes(osb);
1787 * The routine gets called from dismount or close whenever a dismount on
1788 * volume is requested and the osb open count becomes 1.
1789 * It will remove the osb from the global list and also free up all the
1790 * initialized resources and fileobject.
1792 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1796 /* This function assumes that the caller has the main osb resource */
1798 ocfs2_free_slot_info(osb);
1800 kfree(osb->osb_orphan_wipes);
1801 kfree(osb->slot_recovery_generations);
1803 * This belongs in journal shutdown, but because we have to
1804 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1807 kfree(osb->journal);
1808 if (osb->local_alloc_copy)
1809 kfree(osb->local_alloc_copy);
1810 kfree(osb->uuid_str);
1811 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1812 memset(osb, 0, sizeof(struct ocfs2_super));
1817 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1818 * panic(). We do not support continue-on-error operation. */
1819 static void ocfs2_handle_error(struct super_block *sb)
1821 struct ocfs2_super *osb = OCFS2_SB(sb);
1823 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1824 panic("OCFS2: (device %s): panic forced after error\n",
1827 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1829 if (sb->s_flags & MS_RDONLY &&
1830 (ocfs2_is_soft_readonly(osb) ||
1831 ocfs2_is_hard_readonly(osb)))
1834 printk(KERN_CRIT "File system is now read-only due to the potential "
1835 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1836 "system is unmounted.\n");
1837 sb->s_flags |= MS_RDONLY;
1838 ocfs2_set_ro_flag(osb, 0);
1841 static char error_buf[1024];
1843 void __ocfs2_error(struct super_block *sb,
1844 const char *function,
1845 const char *fmt, ...)
1849 va_start(args, fmt);
1850 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1853 /* Not using mlog here because we want to show the actual
1854 * function the error came from. */
1855 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1856 sb->s_id, function, error_buf);
1858 ocfs2_handle_error(sb);
1861 /* Handle critical errors. This is intentionally more drastic than
1862 * ocfs2_handle_error, so we only use for things like journal errors,
1864 void __ocfs2_abort(struct super_block* sb,
1865 const char *function,
1866 const char *fmt, ...)
1870 va_start(args, fmt);
1871 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1874 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1875 sb->s_id, function, error_buf);
1877 /* We don't have the cluster support yet to go straight to
1878 * hard readonly in here. Until then, we want to keep
1879 * ocfs2_abort() so that we can at least mark critical
1882 * TODO: This should abort the journal and alert other nodes
1883 * that our slot needs recovery. */
1885 /* Force a panic(). This stinks, but it's better than letting
1886 * things continue without having a proper hard readonly
1888 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1889 ocfs2_handle_error(sb);
1892 module_init(ocfs2_init);
1893 module_exit(ocfs2_exit);