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>
44 #include <cluster/nodemanager.h>
46 #define MLOG_MASK_PREFIX ML_SUPER
47 #include <cluster/masklog.h>
51 /* this should be the only file to include a version 1 header */
52 #include "ocfs1_fs_compat.h"
57 #include "extent_map.h"
58 #include "heartbeat.h"
61 #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
;
92 static int ocfs2_parse_options(struct super_block
*sb
, char *options
,
93 struct mount_options
*mopt
,
95 static int ocfs2_show_options(struct seq_file
*s
, struct vfsmount
*mnt
);
96 static void ocfs2_put_super(struct super_block
*sb
);
97 static int ocfs2_mount_volume(struct super_block
*sb
);
98 static int ocfs2_remount(struct super_block
*sb
, int *flags
, char *data
);
99 static void ocfs2_dismount_volume(struct super_block
*sb
, int mnt_err
);
100 static int ocfs2_initialize_mem_caches(void);
101 static void ocfs2_free_mem_caches(void);
102 static void ocfs2_delete_osb(struct ocfs2_super
*osb
);
104 static int ocfs2_statfs(struct dentry
*dentry
, struct kstatfs
*buf
);
106 static int ocfs2_sync_fs(struct super_block
*sb
, int wait
);
108 static int ocfs2_init_global_system_inodes(struct ocfs2_super
*osb
);
109 static int ocfs2_init_local_system_inodes(struct ocfs2_super
*osb
);
110 static void ocfs2_release_system_inodes(struct ocfs2_super
*osb
);
111 static int ocfs2_fill_local_node_info(struct ocfs2_super
*osb
);
112 static int ocfs2_check_volume(struct ocfs2_super
*osb
);
113 static int ocfs2_verify_volume(struct ocfs2_dinode
*di
,
114 struct buffer_head
*bh
,
116 static int ocfs2_initialize_super(struct super_block
*sb
,
117 struct buffer_head
*bh
,
119 static int ocfs2_get_sector(struct super_block
*sb
,
120 struct buffer_head
**bh
,
123 static void ocfs2_write_super(struct super_block
*sb
);
124 static struct inode
*ocfs2_alloc_inode(struct super_block
*sb
);
125 static void ocfs2_destroy_inode(struct inode
*inode
);
127 static const struct super_operations ocfs2_sops
= {
128 .statfs
= ocfs2_statfs
,
129 .alloc_inode
= ocfs2_alloc_inode
,
130 .destroy_inode
= ocfs2_destroy_inode
,
131 .drop_inode
= ocfs2_drop_inode
,
132 .clear_inode
= ocfs2_clear_inode
,
133 .delete_inode
= ocfs2_delete_inode
,
134 .sync_fs
= ocfs2_sync_fs
,
135 .write_super
= ocfs2_write_super
,
136 .put_super
= ocfs2_put_super
,
137 .remount_fs
= ocfs2_remount
,
138 .show_options
= ocfs2_show_options
,
157 static match_table_t tokens
= {
158 {Opt_barrier
, "barrier=%u"},
159 {Opt_err_panic
, "errors=panic"},
160 {Opt_err_ro
, "errors=remount-ro"},
162 {Opt_nointr
, "nointr"},
163 {Opt_hb_none
, OCFS2_HB_NONE
},
164 {Opt_hb_local
, OCFS2_HB_LOCAL
},
165 {Opt_data_ordered
, "data=ordered"},
166 {Opt_data_writeback
, "data=writeback"},
167 {Opt_atime_quantum
, "atime_quantum=%u"},
168 {Opt_slot
, "preferred_slot=%u"},
169 {Opt_commit
, "commit=%u"},
174 * write_super and sync_fs ripped right out of ext3.
176 static void ocfs2_write_super(struct super_block
*sb
)
178 if (mutex_trylock(&sb
->s_lock
) != 0)
183 static int ocfs2_sync_fs(struct super_block
*sb
, int wait
)
187 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
191 if (ocfs2_is_hard_readonly(osb
))
195 status
= ocfs2_flush_truncate_log(osb
);
199 ocfs2_schedule_truncate_log_flush(osb
, 0);
202 if (journal_start_commit(OCFS2_SB(sb
)->journal
->j_journal
, &target
)) {
204 log_wait_commit(OCFS2_SB(sb
)->journal
->j_journal
,
210 static int ocfs2_init_global_system_inodes(struct ocfs2_super
*osb
)
212 struct inode
*new = NULL
;
218 new = ocfs2_iget(osb
, osb
->root_blkno
, OCFS2_FI_FLAG_SYSFILE
);
220 status
= PTR_ERR(new);
224 osb
->root_inode
= new;
226 new = ocfs2_iget(osb
, osb
->system_dir_blkno
, OCFS2_FI_FLAG_SYSFILE
);
228 status
= PTR_ERR(new);
232 osb
->sys_root_inode
= new;
234 for (i
= OCFS2_FIRST_ONLINE_SYSTEM_INODE
;
235 i
<= OCFS2_LAST_GLOBAL_SYSTEM_INODE
; i
++) {
236 new = ocfs2_get_system_file_inode(osb
, i
, osb
->slot_num
);
238 ocfs2_release_system_inodes(osb
);
241 /* FIXME: Should ERROR_RO_FS */
242 mlog(ML_ERROR
, "Unable to load system inode %d, "
243 "possibly corrupt fs?", i
);
246 // the array now has one ref, so drop this one
255 static int ocfs2_init_local_system_inodes(struct ocfs2_super
*osb
)
257 struct inode
*new = NULL
;
263 for (i
= OCFS2_LAST_GLOBAL_SYSTEM_INODE
+ 1;
264 i
< NUM_SYSTEM_INODES
;
266 new = ocfs2_get_system_file_inode(osb
, i
, osb
->slot_num
);
268 ocfs2_release_system_inodes(osb
);
270 mlog(ML_ERROR
, "status=%d, sysfile=%d, slot=%d\n",
271 status
, i
, osb
->slot_num
);
274 /* the array now has one ref, so drop this one */
283 static void ocfs2_release_system_inodes(struct ocfs2_super
*osb
)
290 for (i
= 0; i
< NUM_SYSTEM_INODES
; i
++) {
291 inode
= osb
->system_inodes
[i
];
294 osb
->system_inodes
[i
] = NULL
;
298 inode
= osb
->sys_root_inode
;
301 osb
->sys_root_inode
= NULL
;
304 inode
= osb
->root_inode
;
307 osb
->root_inode
= NULL
;
313 /* We're allocating fs objects, use GFP_NOFS */
314 static struct inode
*ocfs2_alloc_inode(struct super_block
*sb
)
316 struct ocfs2_inode_info
*oi
;
318 oi
= kmem_cache_alloc(ocfs2_inode_cachep
, GFP_NOFS
);
322 return &oi
->vfs_inode
;
325 static void ocfs2_destroy_inode(struct inode
*inode
)
327 kmem_cache_free(ocfs2_inode_cachep
, OCFS2_I(inode
));
330 static unsigned long long ocfs2_max_file_offset(unsigned int bbits
,
333 unsigned int bytes
= 1 << cbits
;
334 unsigned int trim
= bytes
;
335 unsigned int bitshift
= 32;
338 * i_size and all block offsets in ocfs2 are always 64 bits
339 * wide. i_clusters is 32 bits, in cluster-sized units. So on
340 * 64 bit platforms, cluster size will be the limiting factor.
343 #if BITS_PER_LONG == 32
344 # if defined(CONFIG_LBD)
345 BUILD_BUG_ON(sizeof(sector_t
) != 8);
347 * We might be limited by page cache size.
349 if (bytes
> PAGE_CACHE_SIZE
) {
350 bytes
= PAGE_CACHE_SIZE
;
353 * Shift by 31 here so that we don't get larger than
360 * We are limited by the size of sector_t. Use block size, as
361 * that's what we expose to the VFS.
370 * Trim by a whole cluster when we can actually approach the
371 * on-disk limits. Otherwise we can overflow i_clusters when
372 * an extent start is at the max offset.
374 return (((unsigned long long)bytes
) << bitshift
) - trim
;
377 static int ocfs2_remount(struct super_block
*sb
, int *flags
, char *data
)
379 int incompat_features
;
381 struct mount_options parsed_options
;
382 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
384 if (!ocfs2_parse_options(sb
, data
, &parsed_options
, 1)) {
389 if ((osb
->s_mount_opt
& OCFS2_MOUNT_HB_LOCAL
) !=
390 (parsed_options
.mount_opt
& OCFS2_MOUNT_HB_LOCAL
)) {
392 mlog(ML_ERROR
, "Cannot change heartbeat mode on remount\n");
396 if ((osb
->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
) !=
397 (parsed_options
.mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
)) {
399 mlog(ML_ERROR
, "Cannot change data mode on remount\n");
403 /* We're going to/from readonly mode. */
404 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
)) {
405 /* Lock here so the check of HARD_RO and the potential
406 * setting of SOFT_RO is atomic. */
407 spin_lock(&osb
->osb_lock
);
408 if (osb
->osb_flags
& OCFS2_OSB_HARD_RO
) {
409 mlog(ML_ERROR
, "Remount on readonly device is forbidden.\n");
414 if (*flags
& MS_RDONLY
) {
415 mlog(0, "Going to ro mode.\n");
416 sb
->s_flags
|= MS_RDONLY
;
417 osb
->osb_flags
|= OCFS2_OSB_SOFT_RO
;
419 mlog(0, "Making ro filesystem writeable.\n");
421 if (osb
->osb_flags
& OCFS2_OSB_ERROR_FS
) {
422 mlog(ML_ERROR
, "Cannot remount RDWR "
423 "filesystem due to previous errors.\n");
427 incompat_features
= OCFS2_HAS_RO_COMPAT_FEATURE(sb
, ~OCFS2_FEATURE_RO_COMPAT_SUPP
);
428 if (incompat_features
) {
429 mlog(ML_ERROR
, "Cannot remount RDWR because "
430 "of unsupported optional features "
431 "(%x).\n", incompat_features
);
435 sb
->s_flags
&= ~MS_RDONLY
;
436 osb
->osb_flags
&= ~OCFS2_OSB_SOFT_RO
;
439 spin_unlock(&osb
->osb_lock
);
443 /* Only save off the new mount options in case of a successful
445 osb
->s_mount_opt
= parsed_options
.mount_opt
;
446 osb
->s_atime_quantum
= parsed_options
.atime_quantum
;
447 osb
->preferred_slot
= parsed_options
.slot
;
448 if (parsed_options
.commit_interval
)
449 osb
->osb_commit_interval
= parsed_options
.commit_interval
;
451 if (!ocfs2_is_hard_readonly(osb
))
452 ocfs2_set_journal_params(osb
);
458 static int ocfs2_sb_probe(struct super_block
*sb
,
459 struct buffer_head
**bh
,
463 struct ocfs1_vol_disk_hdr
*hdr
;
464 struct ocfs2_dinode
*di
;
470 *sector_size
= bdev_hardsect_size(sb
->s_bdev
);
471 if (*sector_size
> OCFS2_MAX_BLOCKSIZE
) {
472 mlog(ML_ERROR
, "Hardware sector size too large: %d (max=%d)\n",
473 *sector_size
, OCFS2_MAX_BLOCKSIZE
);
478 /* Can this really happen? */
479 if (*sector_size
< OCFS2_MIN_BLOCKSIZE
)
480 *sector_size
= OCFS2_MIN_BLOCKSIZE
;
482 /* check block zero for old format */
483 status
= ocfs2_get_sector(sb
, bh
, 0, *sector_size
);
488 hdr
= (struct ocfs1_vol_disk_hdr
*) (*bh
)->b_data
;
489 if (hdr
->major_version
== OCFS1_MAJOR_VERSION
) {
490 mlog(ML_ERROR
, "incompatible version: %u.%u\n",
491 hdr
->major_version
, hdr
->minor_version
);
494 if (memcmp(hdr
->signature
, OCFS1_VOLUME_SIGNATURE
,
495 strlen(OCFS1_VOLUME_SIGNATURE
)) == 0) {
496 mlog(ML_ERROR
, "incompatible volume signature: %8s\n",
503 mlog(ML_ERROR
, "This is an ocfs v1 filesystem which must be "
504 "upgraded before mounting with ocfs v2\n");
509 * Now check at magic offset for 512, 1024, 2048, 4096
510 * blocksizes. 4096 is the maximum blocksize because it is
511 * the minimum clustersize.
514 for (blksize
= *sector_size
;
515 blksize
<= OCFS2_MAX_BLOCKSIZE
;
517 tmpstat
= ocfs2_get_sector(sb
, bh
,
518 OCFS2_SUPER_BLOCK_BLKNO
,
525 di
= (struct ocfs2_dinode
*) (*bh
)->b_data
;
526 status
= ocfs2_verify_volume(di
, *bh
, blksize
);
531 if (status
!= -EAGAIN
)
539 static int ocfs2_verify_heartbeat(struct ocfs2_super
*osb
)
541 if (ocfs2_mount_local(osb
)) {
542 if (osb
->s_mount_opt
& OCFS2_MOUNT_HB_LOCAL
) {
543 mlog(ML_ERROR
, "Cannot heartbeat on a locally "
544 "mounted device.\n");
549 if (!(osb
->s_mount_opt
& OCFS2_MOUNT_HB_LOCAL
)) {
550 if (!ocfs2_mount_local(osb
) && !ocfs2_is_hard_readonly(osb
)) {
551 mlog(ML_ERROR
, "Heartbeat has to be started to mount "
552 "a read-write clustered device.\n");
560 static int ocfs2_fill_super(struct super_block
*sb
, void *data
, int silent
)
563 int status
, sector_size
;
564 struct mount_options parsed_options
;
565 struct inode
*inode
= NULL
;
566 struct ocfs2_super
*osb
= NULL
;
567 struct buffer_head
*bh
= NULL
;
570 mlog_entry("%p, %p, %i", sb
, data
, silent
);
572 if (!ocfs2_parse_options(sb
, data
, &parsed_options
, 0)) {
574 goto read_super_error
;
577 /* for now we only have one cluster/node, make sure we see it
578 * in the heartbeat universe */
579 if (parsed_options
.mount_opt
& OCFS2_MOUNT_HB_LOCAL
) {
580 if (!o2hb_check_local_node_heartbeating()) {
582 goto read_super_error
;
586 /* probe for superblock */
587 status
= ocfs2_sb_probe(sb
, &bh
, §or_size
);
589 mlog(ML_ERROR
, "superblock probe failed!\n");
590 goto read_super_error
;
593 status
= ocfs2_initialize_super(sb
, bh
, sector_size
);
597 goto read_super_error
;
601 osb
->s_mount_opt
= parsed_options
.mount_opt
;
602 osb
->s_atime_quantum
= parsed_options
.atime_quantum
;
603 osb
->preferred_slot
= parsed_options
.slot
;
604 osb
->osb_commit_interval
= parsed_options
.commit_interval
;
606 sb
->s_magic
= OCFS2_SUPER_MAGIC
;
608 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
610 if (bdev_read_only(sb
->s_bdev
)) {
611 if (!(sb
->s_flags
& MS_RDONLY
)) {
613 mlog(ML_ERROR
, "Readonly device detected but readonly "
614 "mount was not specified.\n");
615 goto read_super_error
;
618 /* You should not be able to start a local heartbeat
619 * on a readonly device. */
620 if (osb
->s_mount_opt
& OCFS2_MOUNT_HB_LOCAL
) {
622 mlog(ML_ERROR
, "Local heartbeat specified on readonly "
624 goto read_super_error
;
627 status
= ocfs2_check_journals_nolocks(osb
);
629 if (status
== -EROFS
)
630 mlog(ML_ERROR
, "Recovery required on readonly "
631 "file system, but write access is "
635 goto read_super_error
;
638 ocfs2_set_ro_flag(osb
, 1);
640 printk(KERN_NOTICE
"Readonly device detected. No cluster "
641 "services will be utilized for this mount. Recovery "
642 "will be skipped.\n");
645 if (!ocfs2_is_hard_readonly(osb
)) {
646 if (sb
->s_flags
& MS_RDONLY
)
647 ocfs2_set_ro_flag(osb
, 0);
650 status
= ocfs2_verify_heartbeat(osb
);
653 goto read_super_error
;
656 osb
->osb_debug_root
= debugfs_create_dir(osb
->uuid_str
,
658 if (!osb
->osb_debug_root
) {
660 mlog(ML_ERROR
, "Unable to create per-mount debugfs root.\n");
661 goto read_super_error
;
664 status
= ocfs2_mount_volume(sb
);
666 inode
= igrab(osb
->root_inode
);
669 goto read_super_error
;
674 goto read_super_error
;
677 root
= d_alloc_root(inode
);
681 goto read_super_error
;
686 ocfs2_complete_mount_recovery(osb
);
688 if (ocfs2_mount_local(osb
))
689 snprintf(nodestr
, sizeof(nodestr
), "local");
691 snprintf(nodestr
, sizeof(nodestr
), "%d", osb
->node_num
);
693 printk(KERN_INFO
"ocfs2: Mounting device (%s) on (node %s, slot %d) "
694 "with %s data mode.\n",
695 osb
->dev_str
, nodestr
, osb
->slot_num
,
696 osb
->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
? "writeback" :
699 atomic_set(&osb
->vol_state
, VOLUME_MOUNTED
);
700 wake_up(&osb
->osb_mount_event
);
713 atomic_set(&osb
->vol_state
, VOLUME_DISABLED
);
714 wake_up(&osb
->osb_mount_event
);
715 ocfs2_dismount_volume(sb
, 1);
722 static int ocfs2_get_sb(struct file_system_type
*fs_type
,
724 const char *dev_name
,
726 struct vfsmount
*mnt
)
728 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ocfs2_fill_super
,
732 static struct file_system_type ocfs2_fs_type
= {
733 .owner
= THIS_MODULE
,
735 .get_sb
= ocfs2_get_sb
, /* is this called when we mount
737 .kill_sb
= kill_block_super
, /* set to the generic one
738 * right now, but do we
739 * need to change that? */
740 .fs_flags
= FS_REQUIRES_DEV
|FS_RENAME_DOES_D_MOVE
,
744 static int ocfs2_parse_options(struct super_block
*sb
,
746 struct mount_options
*mopt
,
752 mlog_entry("remount: %d, options: \"%s\"\n", is_remount
,
753 options
? options
: "(none)");
755 mopt
->commit_interval
= 0;
757 mopt
->atime_quantum
= OCFS2_DEFAULT_ATIME_QUANTUM
;
758 mopt
->slot
= OCFS2_INVALID_SLOT
;
765 while ((p
= strsep(&options
, ",")) != NULL
) {
767 substring_t args
[MAX_OPT_ARGS
];
772 token
= match_token(p
, tokens
, args
);
775 mopt
->mount_opt
|= OCFS2_MOUNT_HB_LOCAL
;
778 mopt
->mount_opt
&= ~OCFS2_MOUNT_HB_LOCAL
;
781 if (match_int(&args
[0], &option
)) {
786 mopt
->mount_opt
|= OCFS2_MOUNT_BARRIER
;
788 mopt
->mount_opt
&= ~OCFS2_MOUNT_BARRIER
;
791 mopt
->mount_opt
&= ~OCFS2_MOUNT_NOINTR
;
794 mopt
->mount_opt
|= OCFS2_MOUNT_NOINTR
;
797 mopt
->mount_opt
|= OCFS2_MOUNT_ERRORS_PANIC
;
800 mopt
->mount_opt
&= ~OCFS2_MOUNT_ERRORS_PANIC
;
802 case Opt_data_ordered
:
803 mopt
->mount_opt
&= ~OCFS2_MOUNT_DATA_WRITEBACK
;
805 case Opt_data_writeback
:
806 mopt
->mount_opt
|= OCFS2_MOUNT_DATA_WRITEBACK
;
808 case Opt_atime_quantum
:
809 if (match_int(&args
[0], &option
)) {
814 mopt
->atime_quantum
= option
;
818 if (match_int(&args
[0], &option
)) {
823 mopt
->slot
= (s16
)option
;
827 if (match_int(&args
[0], &option
)) {
834 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
835 mopt
->commit_interval
= HZ
* option
;
839 "Unrecognized mount option \"%s\" "
840 "or missing value\n", p
);
853 static int ocfs2_show_options(struct seq_file
*s
, struct vfsmount
*mnt
)
855 struct ocfs2_super
*osb
= OCFS2_SB(mnt
->mnt_sb
);
856 unsigned long opts
= osb
->s_mount_opt
;
858 if (opts
& OCFS2_MOUNT_HB_LOCAL
)
859 seq_printf(s
, ",_netdev,heartbeat=local");
861 seq_printf(s
, ",heartbeat=none");
863 if (opts
& OCFS2_MOUNT_NOINTR
)
864 seq_printf(s
, ",nointr");
866 if (opts
& OCFS2_MOUNT_DATA_WRITEBACK
)
867 seq_printf(s
, ",data=writeback");
869 seq_printf(s
, ",data=ordered");
871 if (opts
& OCFS2_MOUNT_BARRIER
)
872 seq_printf(s
, ",barrier=1");
874 if (opts
& OCFS2_MOUNT_ERRORS_PANIC
)
875 seq_printf(s
, ",errors=panic");
877 seq_printf(s
, ",errors=remount-ro");
879 if (osb
->preferred_slot
!= OCFS2_INVALID_SLOT
)
880 seq_printf(s
, ",preferred_slot=%d", osb
->preferred_slot
);
882 if (osb
->s_atime_quantum
!= OCFS2_DEFAULT_ATIME_QUANTUM
)
883 seq_printf(s
, ",atime_quantum=%u", osb
->s_atime_quantum
);
885 if (osb
->osb_commit_interval
)
886 seq_printf(s
, ",commit=%u",
887 (unsigned) (osb
->osb_commit_interval
/ HZ
));
892 static int __init
ocfs2_init(void)
898 ocfs2_print_version();
900 status
= init_ocfs2_uptodate_cache();
906 status
= ocfs2_initialize_mem_caches();
912 ocfs2_wq
= create_singlethread_workqueue("ocfs2_wq");
918 ocfs2_debugfs_root
= debugfs_create_dir("ocfs2", NULL
);
919 if (!ocfs2_debugfs_root
) {
921 mlog(ML_ERROR
, "Unable to create ocfs2 debugfs root.\n");
926 ocfs2_free_mem_caches();
927 exit_ocfs2_uptodate_cache();
933 return register_filesystem(&ocfs2_fs_type
);
938 static void __exit
ocfs2_exit(void)
943 flush_workqueue(ocfs2_wq
);
944 destroy_workqueue(ocfs2_wq
);
947 debugfs_remove(ocfs2_debugfs_root
);
949 ocfs2_free_mem_caches();
951 unregister_filesystem(&ocfs2_fs_type
);
953 exit_ocfs2_uptodate_cache();
958 static void ocfs2_put_super(struct super_block
*sb
)
960 mlog_entry("(0x%p)\n", sb
);
962 ocfs2_sync_blockdev(sb
);
963 ocfs2_dismount_volume(sb
, 0);
968 static int ocfs2_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
970 struct ocfs2_super
*osb
;
971 u32 numbits
, freebits
;
973 struct ocfs2_dinode
*bm_lock
;
974 struct buffer_head
*bh
= NULL
;
975 struct inode
*inode
= NULL
;
977 mlog_entry("(%p, %p)\n", dentry
->d_sb
, buf
);
979 osb
= OCFS2_SB(dentry
->d_sb
);
981 inode
= ocfs2_get_system_file_inode(osb
,
982 GLOBAL_BITMAP_SYSTEM_INODE
,
985 mlog(ML_ERROR
, "failed to get bitmap inode\n");
990 status
= ocfs2_inode_lock(inode
, &bh
, 0);
996 bm_lock
= (struct ocfs2_dinode
*) bh
->b_data
;
998 numbits
= le32_to_cpu(bm_lock
->id1
.bitmap1
.i_total
);
999 freebits
= numbits
- le32_to_cpu(bm_lock
->id1
.bitmap1
.i_used
);
1001 buf
->f_type
= OCFS2_SUPER_MAGIC
;
1002 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
1003 buf
->f_namelen
= OCFS2_MAX_FILENAME_LEN
;
1004 buf
->f_blocks
= ((sector_t
) numbits
) *
1005 (osb
->s_clustersize
>> osb
->sb
->s_blocksize_bits
);
1006 buf
->f_bfree
= ((sector_t
) freebits
) *
1007 (osb
->s_clustersize
>> osb
->sb
->s_blocksize_bits
);
1008 buf
->f_bavail
= buf
->f_bfree
;
1009 buf
->f_files
= numbits
;
1010 buf
->f_ffree
= freebits
;
1014 ocfs2_inode_unlock(inode
, 0);
1025 static void ocfs2_inode_init_once(struct kmem_cache
*cachep
, void *data
)
1027 struct ocfs2_inode_info
*oi
= data
;
1030 oi
->ip_open_count
= 0;
1031 spin_lock_init(&oi
->ip_lock
);
1032 ocfs2_extent_map_init(&oi
->vfs_inode
);
1033 INIT_LIST_HEAD(&oi
->ip_io_markers
);
1034 oi
->ip_created_trans
= 0;
1035 oi
->ip_last_trans
= 0;
1036 oi
->ip_dir_start_lookup
= 0;
1038 init_rwsem(&oi
->ip_alloc_sem
);
1039 mutex_init(&oi
->ip_io_mutex
);
1041 oi
->ip_blkno
= 0ULL;
1042 oi
->ip_clusters
= 0;
1044 ocfs2_lock_res_init_once(&oi
->ip_rw_lockres
);
1045 ocfs2_lock_res_init_once(&oi
->ip_inode_lockres
);
1046 ocfs2_lock_res_init_once(&oi
->ip_open_lockres
);
1048 ocfs2_metadata_cache_init(&oi
->vfs_inode
);
1050 inode_init_once(&oi
->vfs_inode
);
1053 static int ocfs2_initialize_mem_caches(void)
1055 ocfs2_inode_cachep
= kmem_cache_create("ocfs2_inode_cache",
1056 sizeof(struct ocfs2_inode_info
),
1058 (SLAB_HWCACHE_ALIGN
|SLAB_RECLAIM_ACCOUNT
|
1060 ocfs2_inode_init_once
);
1061 if (!ocfs2_inode_cachep
)
1067 static void ocfs2_free_mem_caches(void)
1069 if (ocfs2_inode_cachep
)
1070 kmem_cache_destroy(ocfs2_inode_cachep
);
1072 ocfs2_inode_cachep
= NULL
;
1075 static int ocfs2_get_sector(struct super_block
*sb
,
1076 struct buffer_head
**bh
,
1080 if (!sb_set_blocksize(sb
, sect_size
)) {
1081 mlog(ML_ERROR
, "unable to set blocksize\n");
1085 *bh
= sb_getblk(sb
, block
);
1091 if (!buffer_dirty(*bh
))
1092 clear_buffer_uptodate(*bh
);
1094 ll_rw_block(READ
, 1, bh
);
1095 wait_on_buffer(*bh
);
1099 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
1100 static int ocfs2_fill_local_node_info(struct ocfs2_super
*osb
)
1104 /* XXX hold a ref on the node while mounte? easy enough, if
1106 if (ocfs2_mount_local(osb
))
1109 osb
->node_num
= o2nm_this_node();
1111 if (osb
->node_num
== O2NM_MAX_NODES
) {
1112 mlog(ML_ERROR
, "could not find this host's node number\n");
1117 mlog(0, "I am node %d\n", osb
->node_num
);
1124 static int ocfs2_mount_volume(struct super_block
*sb
)
1127 int unlock_super
= 0;
1128 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
1132 if (ocfs2_is_hard_readonly(osb
))
1135 status
= ocfs2_fill_local_node_info(osb
);
1141 status
= ocfs2_dlm_init(osb
);
1147 status
= ocfs2_super_lock(osb
, 1);
1154 /* This will load up the node map and add ourselves to it. */
1155 status
= ocfs2_find_slot(osb
);
1161 /* load all node-local system inodes */
1162 status
= ocfs2_init_local_system_inodes(osb
);
1168 status
= ocfs2_check_volume(osb
);
1174 status
= ocfs2_truncate_log_init(osb
);
1180 if (ocfs2_mount_local(osb
))
1185 ocfs2_super_unlock(osb
, 1);
1191 /* we can't grab the goofy sem lock from inside wait_event, so we use
1192 * memory barriers to make sure that we'll see the null task before
1194 static int ocfs2_recovery_thread_running(struct ocfs2_super
*osb
)
1197 return osb
->recovery_thread_task
!= NULL
;
1200 static void ocfs2_dismount_volume(struct super_block
*sb
, int mnt_err
)
1203 struct ocfs2_super
*osb
= NULL
;
1206 mlog_entry("(0x%p)\n", sb
);
1212 ocfs2_shutdown_local_alloc(osb
);
1214 ocfs2_truncate_log_shutdown(osb
);
1216 /* disable any new recovery threads and wait for any currently
1217 * running ones to exit. Do this before setting the vol_state. */
1218 mutex_lock(&osb
->recovery_lock
);
1219 osb
->disable_recovery
= 1;
1220 mutex_unlock(&osb
->recovery_lock
);
1221 wait_event(osb
->recovery_event
, !ocfs2_recovery_thread_running(osb
));
1223 /* At this point, we know that no more recovery threads can be
1224 * launched, so wait for any recovery completion work to
1226 flush_workqueue(ocfs2_wq
);
1228 ocfs2_journal_shutdown(osb
);
1230 ocfs2_sync_blockdev(sb
);
1232 /* No dlm means we've failed during mount, so skip all the
1233 * steps which depended on that to complete. */
1235 tmp
= ocfs2_super_lock(osb
, 1);
1242 if (osb
->slot_num
!= OCFS2_INVALID_SLOT
)
1243 ocfs2_put_slot(osb
);
1246 ocfs2_super_unlock(osb
, 1);
1248 ocfs2_release_system_inodes(osb
);
1251 ocfs2_dlm_shutdown(osb
);
1253 debugfs_remove(osb
->osb_debug_root
);
1256 ocfs2_stop_heartbeat(osb
);
1258 atomic_set(&osb
->vol_state
, VOLUME_DISMOUNTED
);
1260 if (ocfs2_mount_local(osb
))
1261 snprintf(nodestr
, sizeof(nodestr
), "local");
1263 snprintf(nodestr
, sizeof(nodestr
), "%d", osb
->node_num
);
1265 printk(KERN_INFO
"ocfs2: Unmounting device (%s) on (node %s)\n",
1266 osb
->dev_str
, nodestr
);
1268 ocfs2_delete_osb(osb
);
1271 sb
->s_fs_info
= NULL
;
1274 static int ocfs2_setup_osb_uuid(struct ocfs2_super
*osb
, const unsigned char *uuid
,
1275 unsigned uuid_bytes
)
1280 BUG_ON(uuid_bytes
!= OCFS2_VOL_UUID_LEN
);
1282 osb
->uuid_str
= kzalloc(OCFS2_VOL_UUID_LEN
* 2 + 1, GFP_KERNEL
);
1283 if (osb
->uuid_str
== NULL
)
1286 for (i
= 0, ptr
= osb
->uuid_str
; i
< OCFS2_VOL_UUID_LEN
; i
++) {
1287 /* print with null */
1288 ret
= snprintf(ptr
, 3, "%02X", uuid
[i
]);
1289 if (ret
!= 2) /* drop super cleans up */
1291 /* then only advance past the last char */
1298 static int ocfs2_initialize_super(struct super_block
*sb
,
1299 struct buffer_head
*bh
,
1303 int i
, cbits
, bbits
;
1304 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)bh
->b_data
;
1305 struct inode
*inode
= NULL
;
1306 struct ocfs2_journal
*journal
;
1307 __le32 uuid_net_key
;
1308 struct ocfs2_super
*osb
;
1312 osb
= kzalloc(sizeof(struct ocfs2_super
), GFP_KERNEL
);
1319 sb
->s_fs_info
= osb
;
1320 sb
->s_op
= &ocfs2_sops
;
1321 sb
->s_export_op
= &ocfs2_export_ops
;
1322 sb
->s_time_gran
= 1;
1323 sb
->s_flags
|= MS_NOATIME
;
1324 /* this is needed to support O_LARGEFILE */
1325 cbits
= le32_to_cpu(di
->id2
.i_super
.s_clustersize_bits
);
1326 bbits
= le32_to_cpu(di
->id2
.i_super
.s_blocksize_bits
);
1327 sb
->s_maxbytes
= ocfs2_max_file_offset(bbits
, cbits
);
1330 /* Save off for ocfs2_rw_direct */
1331 osb
->s_sectsize_bits
= blksize_bits(sector_size
);
1332 BUG_ON(!osb
->s_sectsize_bits
);
1334 init_waitqueue_head(&osb
->recovery_event
);
1335 spin_lock_init(&osb
->dc_task_lock
);
1336 init_waitqueue_head(&osb
->dc_event
);
1337 osb
->dc_work_sequence
= 0;
1338 osb
->dc_wake_sequence
= 0;
1339 INIT_LIST_HEAD(&osb
->blocked_lock_list
);
1340 osb
->blocked_lock_count
= 0;
1341 spin_lock_init(&osb
->osb_lock
);
1343 atomic_set(&osb
->alloc_stats
.moves
, 0);
1344 atomic_set(&osb
->alloc_stats
.local_data
, 0);
1345 atomic_set(&osb
->alloc_stats
.bitmap_data
, 0);
1346 atomic_set(&osb
->alloc_stats
.bg_allocs
, 0);
1347 atomic_set(&osb
->alloc_stats
.bg_extends
, 0);
1349 ocfs2_init_node_maps(osb
);
1351 snprintf(osb
->dev_str
, sizeof(osb
->dev_str
), "%u,%u",
1352 MAJOR(osb
->sb
->s_dev
), MINOR(osb
->sb
->s_dev
));
1354 mutex_init(&osb
->recovery_lock
);
1356 osb
->disable_recovery
= 0;
1357 osb
->recovery_thread_task
= NULL
;
1359 init_waitqueue_head(&osb
->checkpoint_event
);
1360 atomic_set(&osb
->needs_checkpoint
, 0);
1362 osb
->s_atime_quantum
= OCFS2_DEFAULT_ATIME_QUANTUM
;
1364 osb
->node_num
= O2NM_INVALID_NODE_NUM
;
1365 osb
->slot_num
= OCFS2_INVALID_SLOT
;
1367 osb
->local_alloc_state
= OCFS2_LA_UNUSED
;
1368 osb
->local_alloc_bh
= NULL
;
1370 ocfs2_setup_hb_callbacks(osb
);
1372 init_waitqueue_head(&osb
->osb_mount_event
);
1374 osb
->vol_label
= kmalloc(OCFS2_MAX_VOL_LABEL_LEN
, GFP_KERNEL
);
1375 if (!osb
->vol_label
) {
1376 mlog(ML_ERROR
, "unable to alloc vol label\n");
1381 osb
->max_slots
= le16_to_cpu(di
->id2
.i_super
.s_max_slots
);
1382 if (osb
->max_slots
> OCFS2_MAX_SLOTS
|| osb
->max_slots
== 0) {
1383 mlog(ML_ERROR
, "Invalid number of node slots (%u)\n",
1388 mlog(0, "max_slots for this device: %u\n", osb
->max_slots
);
1390 init_waitqueue_head(&osb
->osb_wipe_event
);
1391 osb
->osb_orphan_wipes
= kcalloc(osb
->max_slots
,
1392 sizeof(*osb
->osb_orphan_wipes
),
1394 if (!osb
->osb_orphan_wipes
) {
1400 osb
->s_feature_compat
=
1401 le32_to_cpu(OCFS2_RAW_SB(di
)->s_feature_compat
);
1402 osb
->s_feature_ro_compat
=
1403 le32_to_cpu(OCFS2_RAW_SB(di
)->s_feature_ro_compat
);
1404 osb
->s_feature_incompat
=
1405 le32_to_cpu(OCFS2_RAW_SB(di
)->s_feature_incompat
);
1407 if ((i
= OCFS2_HAS_INCOMPAT_FEATURE(osb
->sb
, ~OCFS2_FEATURE_INCOMPAT_SUPP
))) {
1408 mlog(ML_ERROR
, "couldn't mount because of unsupported "
1409 "optional features (%x).\n", i
);
1413 if (!(osb
->sb
->s_flags
& MS_RDONLY
) &&
1414 (i
= OCFS2_HAS_RO_COMPAT_FEATURE(osb
->sb
, ~OCFS2_FEATURE_RO_COMPAT_SUPP
))) {
1415 mlog(ML_ERROR
, "couldn't mount RDWR because of "
1416 "unsupported optional features (%x).\n", i
);
1421 get_random_bytes(&osb
->s_next_generation
, sizeof(u32
));
1424 * This should be done in ocfs2_journal_init(), but unknown
1425 * ordering issues will cause the filesystem to crash.
1426 * If anyone wants to figure out what part of the code
1427 * refers to osb->journal before ocfs2_journal_init() is run,
1430 /* initialize our journal structure */
1432 journal
= kzalloc(sizeof(struct ocfs2_journal
), GFP_KERNEL
);
1434 mlog(ML_ERROR
, "unable to alloc journal\n");
1438 osb
->journal
= journal
;
1439 journal
->j_osb
= osb
;
1441 atomic_set(&journal
->j_num_trans
, 0);
1442 init_rwsem(&journal
->j_trans_barrier
);
1443 init_waitqueue_head(&journal
->j_checkpointed
);
1444 spin_lock_init(&journal
->j_lock
);
1445 journal
->j_trans_id
= (unsigned long) 1;
1446 INIT_LIST_HEAD(&journal
->j_la_cleanups
);
1447 INIT_WORK(&journal
->j_recovery_work
, ocfs2_complete_recovery
);
1448 journal
->j_state
= OCFS2_JOURNAL_FREE
;
1450 /* get some pseudo constants for clustersize bits */
1451 osb
->s_clustersize_bits
=
1452 le32_to_cpu(di
->id2
.i_super
.s_clustersize_bits
);
1453 osb
->s_clustersize
= 1 << osb
->s_clustersize_bits
;
1454 mlog(0, "clusterbits=%d\n", osb
->s_clustersize_bits
);
1456 if (osb
->s_clustersize
< OCFS2_MIN_CLUSTERSIZE
||
1457 osb
->s_clustersize
> OCFS2_MAX_CLUSTERSIZE
) {
1458 mlog(ML_ERROR
, "Volume has invalid cluster size (%d)\n",
1459 osb
->s_clustersize
);
1464 if (ocfs2_clusters_to_blocks(osb
->sb
, le32_to_cpu(di
->i_clusters
) - 1)
1466 mlog(ML_ERROR
, "Volume might try to write to blocks beyond "
1467 "what jbd can address in 32 bits.\n");
1472 if (ocfs2_setup_osb_uuid(osb
, di
->id2
.i_super
.s_uuid
,
1473 sizeof(di
->id2
.i_super
.s_uuid
))) {
1474 mlog(ML_ERROR
, "Out of memory trying to setup our uuid.\n");
1479 memcpy(&uuid_net_key
, di
->id2
.i_super
.s_uuid
, sizeof(uuid_net_key
));
1481 strncpy(osb
->vol_label
, di
->id2
.i_super
.s_label
, 63);
1482 osb
->vol_label
[63] = '\0';
1483 osb
->root_blkno
= le64_to_cpu(di
->id2
.i_super
.s_root_blkno
);
1484 osb
->system_dir_blkno
= le64_to_cpu(di
->id2
.i_super
.s_system_dir_blkno
);
1485 osb
->first_cluster_group_blkno
=
1486 le64_to_cpu(di
->id2
.i_super
.s_first_cluster_group
);
1487 osb
->fs_generation
= le32_to_cpu(di
->i_fs_generation
);
1488 mlog(0, "vol_label: %s\n", osb
->vol_label
);
1489 mlog(0, "uuid: %s\n", osb
->uuid_str
);
1490 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1491 (unsigned long long)osb
->root_blkno
,
1492 (unsigned long long)osb
->system_dir_blkno
);
1494 osb
->osb_dlm_debug
= ocfs2_new_dlm_debug();
1495 if (!osb
->osb_dlm_debug
) {
1501 atomic_set(&osb
->vol_state
, VOLUME_INIT
);
1503 /* load root, system_dir, and all global system inodes */
1504 status
= ocfs2_init_global_system_inodes(osb
);
1513 inode
= ocfs2_get_system_file_inode(osb
, GLOBAL_BITMAP_SYSTEM_INODE
,
1514 OCFS2_INVALID_SLOT
);
1521 osb
->bitmap_blkno
= OCFS2_I(inode
)->ip_blkno
;
1524 osb
->bitmap_cpg
= ocfs2_group_bitmap_size(sb
) * 8;
1526 status
= ocfs2_init_slot_info(osb
);
1538 * will return: -EAGAIN if it is ok to keep searching for superblocks
1539 * -EINVAL if there is a bad superblock
1542 static int ocfs2_verify_volume(struct ocfs2_dinode
*di
,
1543 struct buffer_head
*bh
,
1546 int status
= -EAGAIN
;
1550 if (memcmp(di
->i_signature
, OCFS2_SUPER_BLOCK_SIGNATURE
,
1551 strlen(OCFS2_SUPER_BLOCK_SIGNATURE
)) == 0) {
1553 if ((1 << le32_to_cpu(di
->id2
.i_super
.s_blocksize_bits
)) != blksz
) {
1554 mlog(ML_ERROR
, "found superblock with incorrect block "
1555 "size: found %u, should be %u\n",
1556 1 << le32_to_cpu(di
->id2
.i_super
.s_blocksize_bits
),
1558 } else if (le16_to_cpu(di
->id2
.i_super
.s_major_rev_level
) !=
1559 OCFS2_MAJOR_REV_LEVEL
||
1560 le16_to_cpu(di
->id2
.i_super
.s_minor_rev_level
) !=
1561 OCFS2_MINOR_REV_LEVEL
) {
1562 mlog(ML_ERROR
, "found superblock with bad version: "
1563 "found %u.%u, should be %u.%u\n",
1564 le16_to_cpu(di
->id2
.i_super
.s_major_rev_level
),
1565 le16_to_cpu(di
->id2
.i_super
.s_minor_rev_level
),
1566 OCFS2_MAJOR_REV_LEVEL
,
1567 OCFS2_MINOR_REV_LEVEL
);
1568 } else if (bh
->b_blocknr
!= le64_to_cpu(di
->i_blkno
)) {
1569 mlog(ML_ERROR
, "bad block number on superblock: "
1570 "found %llu, should be %llu\n",
1571 (unsigned long long)le64_to_cpu(di
->i_blkno
),
1572 (unsigned long long)bh
->b_blocknr
);
1573 } else if (le32_to_cpu(di
->id2
.i_super
.s_clustersize_bits
) < 12 ||
1574 le32_to_cpu(di
->id2
.i_super
.s_clustersize_bits
) > 20) {
1575 mlog(ML_ERROR
, "bad cluster size found: %u\n",
1576 1 << le32_to_cpu(di
->id2
.i_super
.s_clustersize_bits
));
1577 } else if (!le64_to_cpu(di
->id2
.i_super
.s_root_blkno
)) {
1578 mlog(ML_ERROR
, "bad root_blkno: 0\n");
1579 } else if (!le64_to_cpu(di
->id2
.i_super
.s_system_dir_blkno
)) {
1580 mlog(ML_ERROR
, "bad system_dir_blkno: 0\n");
1581 } else if (le16_to_cpu(di
->id2
.i_super
.s_max_slots
) > OCFS2_MAX_SLOTS
) {
1583 "Superblock slots found greater than file system "
1584 "maximum: found %u, max %u\n",
1585 le16_to_cpu(di
->id2
.i_super
.s_max_slots
),
1597 static int ocfs2_check_volume(struct ocfs2_super
*osb
)
1602 struct ocfs2_dinode
*local_alloc
= NULL
; /* only used if we
1608 /* Init our journal object. */
1609 status
= ocfs2_journal_init(osb
->journal
, &dirty
);
1611 mlog(ML_ERROR
, "Could not initialize journal!\n");
1615 /* If the journal was unmounted cleanly then we don't want to
1616 * recover anything. Otherwise, journal_load will do that
1617 * dirty work for us :) */
1619 status
= ocfs2_journal_wipe(osb
->journal
, 0);
1625 mlog(ML_NOTICE
, "File system was not unmounted cleanly, "
1626 "recovering volume.\n");
1629 local
= ocfs2_mount_local(osb
);
1631 /* will play back anything left in the journal. */
1632 ocfs2_journal_load(osb
->journal
, local
);
1635 /* recover my local alloc if we didn't unmount cleanly. */
1636 status
= ocfs2_begin_local_alloc_recovery(osb
,
1643 /* we complete the recovery process after we've marked
1644 * ourselves as mounted. */
1647 mlog(0, "Journal loaded.\n");
1649 status
= ocfs2_load_local_alloc(osb
);
1656 /* Recovery will be completed after we've mounted the
1657 * rest of the volume. */
1659 osb
->local_alloc_copy
= local_alloc
;
1663 /* go through each journal, trylock it and if you get the
1664 * lock, and it's marked as dirty, set the bit in the recover
1665 * map and launch a recovery thread for it. */
1666 status
= ocfs2_mark_dead_nodes(osb
);
1679 * The routine gets called from dismount or close whenever a dismount on
1680 * volume is requested and the osb open count becomes 1.
1681 * It will remove the osb from the global list and also free up all the
1682 * initialized resources and fileobject.
1684 static void ocfs2_delete_osb(struct ocfs2_super
*osb
)
1688 /* This function assumes that the caller has the main osb resource */
1691 ocfs2_free_slot_info(osb
->slot_info
);
1693 kfree(osb
->osb_orphan_wipes
);
1695 * This belongs in journal shutdown, but because we have to
1696 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1699 kfree(osb
->journal
);
1700 if (osb
->local_alloc_copy
)
1701 kfree(osb
->local_alloc_copy
);
1702 kfree(osb
->uuid_str
);
1703 ocfs2_put_dlm_debug(osb
->osb_dlm_debug
);
1704 memset(osb
, 0, sizeof(struct ocfs2_super
));
1709 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1710 * panic(). We do not support continue-on-error operation. */
1711 static void ocfs2_handle_error(struct super_block
*sb
)
1713 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
1715 if (osb
->s_mount_opt
& OCFS2_MOUNT_ERRORS_PANIC
)
1716 panic("OCFS2: (device %s): panic forced after error\n",
1719 ocfs2_set_osb_flag(osb
, OCFS2_OSB_ERROR_FS
);
1721 if (sb
->s_flags
& MS_RDONLY
&&
1722 (ocfs2_is_soft_readonly(osb
) ||
1723 ocfs2_is_hard_readonly(osb
)))
1726 printk(KERN_CRIT
"File system is now read-only due to the potential "
1727 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1728 "system is unmounted.\n");
1729 sb
->s_flags
|= MS_RDONLY
;
1730 ocfs2_set_ro_flag(osb
, 0);
1733 static char error_buf
[1024];
1735 void __ocfs2_error(struct super_block
*sb
,
1736 const char *function
,
1737 const char *fmt
, ...)
1741 va_start(args
, fmt
);
1742 vsnprintf(error_buf
, sizeof(error_buf
), fmt
, args
);
1745 /* Not using mlog here because we want to show the actual
1746 * function the error came from. */
1747 printk(KERN_CRIT
"OCFS2: ERROR (device %s): %s: %s\n",
1748 sb
->s_id
, function
, error_buf
);
1750 ocfs2_handle_error(sb
);
1753 /* Handle critical errors. This is intentionally more drastic than
1754 * ocfs2_handle_error, so we only use for things like journal errors,
1756 void __ocfs2_abort(struct super_block
* sb
,
1757 const char *function
,
1758 const char *fmt
, ...)
1762 va_start(args
, fmt
);
1763 vsnprintf(error_buf
, sizeof(error_buf
), fmt
, args
);
1766 printk(KERN_CRIT
"OCFS2: abort (device %s): %s: %s\n",
1767 sb
->s_id
, function
, error_buf
);
1769 /* We don't have the cluster support yet to go straight to
1770 * hard readonly in here. Until then, we want to keep
1771 * ocfs2_abort() so that we can at least mark critical
1774 * TODO: This should abort the journal and alert other nodes
1775 * that our slot needs recovery. */
1777 /* Force a panic(). This stinks, but it's better than letting
1778 * things continue without having a proper hard readonly
1780 OCFS2_SB(sb
)->s_mount_opt
|= OCFS2_MOUNT_ERRORS_PANIC
;
1781 ocfs2_handle_error(sb
);
1784 module_init(ocfs2_init
);
1785 module_exit(ocfs2_exit
);