1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Defines functions of journalling api
8 * Copyright (C) 2003, 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.
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/kthread.h>
32 #define MLOG_MASK_PREFIX ML_JOURNAL
33 #include <cluster/masklog.h>
39 #include "extent_map.h"
40 #include "heartbeat.h"
43 #include "localalloc.h"
50 #include "buffer_head_io.h"
52 DEFINE_SPINLOCK(trans_inc_lock
);
54 static int ocfs2_force_read_journal(struct inode
*inode
);
55 static int ocfs2_recover_node(struct ocfs2_super
*osb
,
57 static int __ocfs2_recovery_thread(void *arg
);
58 static int ocfs2_commit_cache(struct ocfs2_super
*osb
);
59 static int ocfs2_wait_on_mount(struct ocfs2_super
*osb
);
60 static void ocfs2_handle_cleanup_locks(struct ocfs2_journal
*journal
,
61 struct ocfs2_journal_handle
*handle
);
62 static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle
*handle
);
63 static int ocfs2_journal_toggle_dirty(struct ocfs2_super
*osb
,
65 static int ocfs2_trylock_journal(struct ocfs2_super
*osb
,
67 static int ocfs2_recover_orphans(struct ocfs2_super
*osb
,
69 static int ocfs2_commit_thread(void *arg
);
71 static int ocfs2_commit_cache(struct ocfs2_super
*osb
)
76 struct ocfs2_journal
*journal
= NULL
;
80 journal
= osb
->journal
;
82 /* Flush all pending commits and checkpoint the journal. */
83 down_write(&journal
->j_trans_barrier
);
85 if (atomic_read(&journal
->j_num_trans
) == 0) {
86 up_write(&journal
->j_trans_barrier
);
87 mlog(0, "No transactions for me to flush!\n");
91 journal_lock_updates(journal
->j_journal
);
92 status
= journal_flush(journal
->j_journal
);
93 journal_unlock_updates(journal
->j_journal
);
95 up_write(&journal
->j_trans_barrier
);
100 old_id
= ocfs2_inc_trans_id(journal
);
102 flushed
= atomic_read(&journal
->j_num_trans
);
103 atomic_set(&journal
->j_num_trans
, 0);
104 up_write(&journal
->j_trans_barrier
);
106 mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n",
107 journal
->j_trans_id
, flushed
);
109 ocfs2_kick_vote_thread(osb
);
110 wake_up(&journal
->j_checkpointed
);
116 struct ocfs2_journal_handle
*ocfs2_alloc_handle(struct ocfs2_super
*osb
)
118 struct ocfs2_journal_handle
*retval
= NULL
;
120 retval
= kcalloc(1, sizeof(*retval
), GFP_NOFS
);
122 mlog(ML_ERROR
, "Failed to allocate memory for journal "
127 retval
->num_locks
= 0;
128 retval
->k_handle
= NULL
;
130 INIT_LIST_HEAD(&retval
->locks
);
131 INIT_LIST_HEAD(&retval
->inode_list
);
132 retval
->journal
= osb
->journal
;
137 /* pass it NULL and it will allocate a new handle object for you. If
138 * you pass it a handle however, it may still return error, in which
139 * case it has free'd the passed handle for you. */
140 struct ocfs2_journal_handle
*ocfs2_start_trans(struct ocfs2_super
*osb
,
141 struct ocfs2_journal_handle
*handle
,
145 journal_t
*journal
= osb
->journal
->j_journal
;
147 mlog_entry("(max_buffs = %d)\n", max_buffs
);
149 BUG_ON(!osb
|| !osb
->journal
->j_journal
);
151 if (ocfs2_is_hard_readonly(osb
)) {
156 BUG_ON(osb
->journal
->j_state
== OCFS2_JOURNAL_FREE
);
157 BUG_ON(max_buffs
<= 0);
159 /* JBD might support this, but our journalling code doesn't yet. */
160 if (journal_current_handle()) {
161 mlog(ML_ERROR
, "Recursive transaction attempted!\n");
166 handle
= ocfs2_alloc_handle(osb
);
169 mlog(ML_ERROR
, "Failed to allocate memory for journal "
174 down_read(&osb
->journal
->j_trans_barrier
);
176 /* actually start the transaction now */
177 handle
->k_handle
= journal_start(journal
, max_buffs
);
178 if (IS_ERR(handle
->k_handle
)) {
179 up_read(&osb
->journal
->j_trans_barrier
);
181 ret
= PTR_ERR(handle
->k_handle
);
182 handle
->k_handle
= NULL
;
185 if (is_journal_aborted(journal
)) {
186 ocfs2_abort(osb
->sb
, "Detected aborted journal");
192 atomic_inc(&(osb
->journal
->j_num_trans
));
193 handle
->flags
|= OCFS2_HANDLE_STARTED
;
195 mlog_exit_ptr(handle
);
200 ocfs2_commit_unstarted_handle(handle
); /* will kfree handle */
206 void ocfs2_handle_add_inode(struct ocfs2_journal_handle
*handle
,
212 atomic_inc(&inode
->i_count
);
214 /* we're obviously changing it... */
215 mutex_lock(&inode
->i_mutex
);
218 BUG_ON(OCFS2_I(inode
)->ip_handle
);
219 BUG_ON(!list_empty(&OCFS2_I(inode
)->ip_handle_list
));
221 OCFS2_I(inode
)->ip_handle
= handle
;
222 list_move_tail(&(OCFS2_I(inode
)->ip_handle_list
), &(handle
->inode_list
));
225 static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle
*handle
)
227 struct list_head
*p
, *n
;
229 struct ocfs2_inode_info
*oi
;
231 list_for_each_safe(p
, n
, &handle
->inode_list
) {
232 oi
= list_entry(p
, struct ocfs2_inode_info
,
234 inode
= &oi
->vfs_inode
;
236 OCFS2_I(inode
)->ip_handle
= NULL
;
237 list_del_init(&OCFS2_I(inode
)->ip_handle_list
);
239 mutex_unlock(&inode
->i_mutex
);
244 /* This is trivial so we do it out of the main commit
245 * paths. Beware, it can be called from start_trans too! */
246 static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle
*handle
)
250 BUG_ON(handle
->flags
& OCFS2_HANDLE_STARTED
);
252 ocfs2_handle_unlock_inodes(handle
);
253 /* You are allowed to add journal locks before the transaction
255 ocfs2_handle_cleanup_locks(handle
->journal
, handle
);
262 void ocfs2_commit_trans(struct ocfs2_journal_handle
*handle
)
264 handle_t
*jbd_handle
;
266 struct ocfs2_journal
*journal
= handle
->journal
;
272 if (!(handle
->flags
& OCFS2_HANDLE_STARTED
)) {
273 ocfs2_commit_unstarted_handle(handle
);
278 /* release inode semaphores we took during this transaction */
279 ocfs2_handle_unlock_inodes(handle
);
281 /* ocfs2_extend_trans may have had to call journal_restart
282 * which will always commit the transaction, but may return
283 * error for any number of reasons. If this is the case, we
284 * clear k_handle as it's not valid any more. */
285 if (handle
->k_handle
) {
286 jbd_handle
= handle
->k_handle
;
288 if (handle
->flags
& OCFS2_HANDLE_SYNC
)
289 jbd_handle
->h_sync
= 1;
291 jbd_handle
->h_sync
= 0;
293 /* actually stop the transaction. if we've set h_sync,
294 * it'll have been committed when we return */
295 retval
= journal_stop(jbd_handle
);
298 mlog(ML_ERROR
, "Could not commit transaction\n");
302 handle
->k_handle
= NULL
; /* it's been free'd in journal_stop */
305 ocfs2_handle_cleanup_locks(journal
, handle
);
307 up_read(&journal
->j_trans_barrier
);
314 * 'nblocks' is what you want to add to the current
315 * transaction. extend_trans will either extend the current handle by
316 * nblocks, or commit it and start a new one with nblocks credits.
318 * WARNING: This will not release any semaphores or disk locks taken
319 * during the transaction, so make sure they were taken *before*
320 * start_trans or we'll have ordering deadlocks.
322 * WARNING2: Note that we do *not* drop j_trans_barrier here. This is
323 * good because transaction ids haven't yet been recorded on the
324 * cluster locks associated with this handle.
326 int ocfs2_extend_trans(struct ocfs2_journal_handle
*handle
,
332 BUG_ON(!(handle
->flags
& OCFS2_HANDLE_STARTED
));
337 mlog(0, "Trying to extend transaction by %d blocks\n", nblocks
);
339 status
= journal_extend(handle
->k_handle
, nblocks
);
346 mlog(0, "journal_extend failed, trying journal_restart\n");
347 status
= journal_restart(handle
->k_handle
, nblocks
);
349 handle
->k_handle
= NULL
;
362 int ocfs2_journal_access(struct ocfs2_journal_handle
*handle
,
364 struct buffer_head
*bh
,
372 BUG_ON(!(handle
->flags
& OCFS2_HANDLE_STARTED
));
374 mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n",
375 (unsigned long long)bh
->b_blocknr
, type
,
376 (type
== OCFS2_JOURNAL_ACCESS_CREATE
) ?
377 "OCFS2_JOURNAL_ACCESS_CREATE" :
378 "OCFS2_JOURNAL_ACCESS_WRITE",
381 /* we can safely remove this assertion after testing. */
382 if (!buffer_uptodate(bh
)) {
383 mlog(ML_ERROR
, "giving me a buffer that's not uptodate!\n");
384 mlog(ML_ERROR
, "b_blocknr=%llu\n",
385 (unsigned long long)bh
->b_blocknr
);
389 /* Set the current transaction information on the inode so
390 * that the locking code knows whether it can drop it's locks
391 * on this inode or not. We're protected from the commit
392 * thread updating the current transaction id until
393 * ocfs2_commit_trans() because ocfs2_start_trans() took
394 * j_trans_barrier for us. */
395 ocfs2_set_inode_lock_trans(OCFS2_SB(inode
->i_sb
)->journal
, inode
);
397 mutex_lock(&OCFS2_I(inode
)->ip_io_mutex
);
399 case OCFS2_JOURNAL_ACCESS_CREATE
:
400 case OCFS2_JOURNAL_ACCESS_WRITE
:
401 status
= journal_get_write_access(handle
->k_handle
, bh
);
404 case OCFS2_JOURNAL_ACCESS_UNDO
:
405 status
= journal_get_undo_access(handle
->k_handle
, bh
);
410 mlog(ML_ERROR
, "Uknown access type!\n");
412 mutex_unlock(&OCFS2_I(inode
)->ip_io_mutex
);
415 mlog(ML_ERROR
, "Error %d getting %d access to buffer!\n",
422 int ocfs2_journal_dirty(struct ocfs2_journal_handle
*handle
,
423 struct buffer_head
*bh
)
427 BUG_ON(!(handle
->flags
& OCFS2_HANDLE_STARTED
));
429 mlog_entry("(bh->b_blocknr=%llu)\n",
430 (unsigned long long)bh
->b_blocknr
);
432 status
= journal_dirty_metadata(handle
->k_handle
, bh
);
434 mlog(ML_ERROR
, "Could not dirty metadata buffer. "
435 "(bh->b_blocknr=%llu)\n",
436 (unsigned long long)bh
->b_blocknr
);
442 int ocfs2_journal_dirty_data(handle_t
*handle
,
443 struct buffer_head
*bh
)
445 int err
= journal_dirty_data(handle
, bh
);
448 /* TODO: When we can handle it, abort the handle and go RO on
454 /* We always assume you're adding a metadata lock at level 'ex' */
455 int ocfs2_handle_add_lock(struct ocfs2_journal_handle
*handle
,
459 struct ocfs2_journal_lock
*lock
;
463 lock
= kmem_cache_alloc(ocfs2_lock_cache
, GFP_NOFS
);
472 lock
->jl_inode
= inode
;
474 list_add_tail(&(lock
->jl_lock_list
), &(handle
->locks
));
483 static void ocfs2_handle_cleanup_locks(struct ocfs2_journal
*journal
,
484 struct ocfs2_journal_handle
*handle
)
486 struct list_head
*p
, *n
;
487 struct ocfs2_journal_lock
*lock
;
490 list_for_each_safe(p
, n
, &(handle
->locks
)) {
491 lock
= list_entry(p
, struct ocfs2_journal_lock
,
493 list_del(&lock
->jl_lock_list
);
496 inode
= lock
->jl_inode
;
497 ocfs2_meta_unlock(inode
, 1);
498 if (atomic_read(&inode
->i_count
) == 1)
500 "Inode %llu, I'm doing a last iput for!",
501 (unsigned long long)OCFS2_I(inode
)->ip_blkno
);
503 kmem_cache_free(ocfs2_lock_cache
, lock
);
507 #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * 5)
509 void ocfs2_set_journal_params(struct ocfs2_super
*osb
)
511 journal_t
*journal
= osb
->journal
->j_journal
;
513 spin_lock(&journal
->j_state_lock
);
514 journal
->j_commit_interval
= OCFS2_DEFAULT_COMMIT_INTERVAL
;
515 if (osb
->s_mount_opt
& OCFS2_MOUNT_BARRIER
)
516 journal
->j_flags
|= JFS_BARRIER
;
518 journal
->j_flags
&= ~JFS_BARRIER
;
519 spin_unlock(&journal
->j_state_lock
);
522 int ocfs2_journal_init(struct ocfs2_journal
*journal
, int *dirty
)
525 struct inode
*inode
= NULL
; /* the journal inode */
526 journal_t
*j_journal
= NULL
;
527 struct ocfs2_dinode
*di
= NULL
;
528 struct buffer_head
*bh
= NULL
;
529 struct ocfs2_super
*osb
;
536 osb
= journal
->j_osb
;
538 /* already have the inode for our journal */
539 inode
= ocfs2_get_system_file_inode(osb
, JOURNAL_SYSTEM_INODE
,
546 if (is_bad_inode(inode
)) {
547 mlog(ML_ERROR
, "access error (bad inode)\n");
554 SET_INODE_JOURNAL(inode
);
555 OCFS2_I(inode
)->ip_open_count
++;
557 /* Skip recovery waits here - journal inode metadata never
558 * changes in a live cluster so it can be considered an
559 * exception to the rule. */
560 status
= ocfs2_meta_lock_full(inode
, NULL
, &bh
, 1,
561 OCFS2_META_LOCK_RECOVERY
);
563 if (status
!= -ERESTARTSYS
)
564 mlog(ML_ERROR
, "Could not get lock on journal!\n");
569 di
= (struct ocfs2_dinode
*)bh
->b_data
;
571 if (inode
->i_size
< OCFS2_MIN_JOURNAL_SIZE
) {
572 mlog(ML_ERROR
, "Journal file size (%lld) is too small!\n",
578 mlog(0, "inode->i_size = %lld\n", inode
->i_size
);
579 mlog(0, "inode->i_blocks = %llu\n",
580 (unsigned long long)inode
->i_blocks
);
581 mlog(0, "inode->ip_clusters = %u\n", OCFS2_I(inode
)->ip_clusters
);
583 /* call the kernels journal init function now */
584 j_journal
= journal_init_inode(inode
);
585 if (j_journal
== NULL
) {
586 mlog(ML_ERROR
, "Linux journal layer error\n");
591 mlog(0, "Returned from journal_init_inode\n");
592 mlog(0, "j_journal->j_maxlen = %u\n", j_journal
->j_maxlen
);
594 *dirty
= (le32_to_cpu(di
->id1
.journal1
.ij_flags
) &
595 OCFS2_JOURNAL_DIRTY_FL
);
597 journal
->j_journal
= j_journal
;
598 journal
->j_inode
= inode
;
601 ocfs2_set_journal_params(osb
);
603 journal
->j_state
= OCFS2_JOURNAL_LOADED
;
609 ocfs2_meta_unlock(inode
, 1);
613 OCFS2_I(inode
)->ip_open_count
--;
622 static int ocfs2_journal_toggle_dirty(struct ocfs2_super
*osb
,
627 struct ocfs2_journal
*journal
= osb
->journal
;
628 struct buffer_head
*bh
= journal
->j_bh
;
629 struct ocfs2_dinode
*fe
;
633 fe
= (struct ocfs2_dinode
*)bh
->b_data
;
634 if (!OCFS2_IS_VALID_DINODE(fe
)) {
635 /* This is called from startup/shutdown which will
636 * handle the errors in a specific manner, so no need
637 * to call ocfs2_error() here. */
638 mlog(ML_ERROR
, "Journal dinode %llu has invalid "
639 "signature: %.*s", (unsigned long long)fe
->i_blkno
, 7,
645 flags
= le32_to_cpu(fe
->id1
.journal1
.ij_flags
);
647 flags
|= OCFS2_JOURNAL_DIRTY_FL
;
649 flags
&= ~OCFS2_JOURNAL_DIRTY_FL
;
650 fe
->id1
.journal1
.ij_flags
= cpu_to_le32(flags
);
652 status
= ocfs2_write_block(osb
, bh
, journal
->j_inode
);
662 * If the journal has been kmalloc'd it needs to be freed after this
665 void ocfs2_journal_shutdown(struct ocfs2_super
*osb
)
667 struct ocfs2_journal
*journal
= NULL
;
669 struct inode
*inode
= NULL
;
670 int num_running_trans
= 0;
676 journal
= osb
->journal
;
680 inode
= journal
->j_inode
;
682 if (journal
->j_state
!= OCFS2_JOURNAL_LOADED
)
685 /* need to inc inode use count as journal_destroy will iput. */
689 num_running_trans
= atomic_read(&(osb
->journal
->j_num_trans
));
690 if (num_running_trans
> 0)
691 mlog(0, "Shutting down journal: must wait on %d "
692 "running transactions!\n",
695 /* Do a commit_cache here. It will flush our journal, *and*
696 * release any locks that are still held.
697 * set the SHUTDOWN flag and release the trans lock.
698 * the commit thread will take the trans lock for us below. */
699 journal
->j_state
= OCFS2_JOURNAL_IN_SHUTDOWN
;
701 /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not
702 * drop the trans_lock (which we want to hold until we
703 * completely destroy the journal. */
704 if (osb
->commit_task
) {
705 /* Wait for the commit thread */
706 mlog(0, "Waiting for ocfs2commit to exit....\n");
707 kthread_stop(osb
->commit_task
);
708 osb
->commit_task
= NULL
;
711 BUG_ON(atomic_read(&(osb
->journal
->j_num_trans
)) != 0);
713 status
= ocfs2_journal_toggle_dirty(osb
, 0);
717 /* Shutdown the kernel journal system */
718 journal_destroy(journal
->j_journal
);
720 OCFS2_I(inode
)->ip_open_count
--;
722 /* unlock our journal */
723 ocfs2_meta_unlock(inode
, 1);
725 brelse(journal
->j_bh
);
726 journal
->j_bh
= NULL
;
728 journal
->j_state
= OCFS2_JOURNAL_FREE
;
730 // up_write(&journal->j_trans_barrier);
737 static void ocfs2_clear_journal_error(struct super_block
*sb
,
743 olderr
= journal_errno(journal
);
745 mlog(ML_ERROR
, "File system error %d recorded in "
746 "journal %u.\n", olderr
, slot
);
747 mlog(ML_ERROR
, "File system on device %s needs checking.\n",
750 journal_ack_err(journal
);
751 journal_clear_err(journal
);
755 int ocfs2_journal_load(struct ocfs2_journal
*journal
)
758 struct ocfs2_super
*osb
;
765 osb
= journal
->j_osb
;
767 status
= journal_load(journal
->j_journal
);
769 mlog(ML_ERROR
, "Failed to load journal!\n");
773 ocfs2_clear_journal_error(osb
->sb
, journal
->j_journal
, osb
->slot_num
);
775 status
= ocfs2_journal_toggle_dirty(osb
, 1);
781 /* Launch the commit thread */
782 osb
->commit_task
= kthread_run(ocfs2_commit_thread
, osb
, "ocfs2cmt");
783 if (IS_ERR(osb
->commit_task
)) {
784 status
= PTR_ERR(osb
->commit_task
);
785 osb
->commit_task
= NULL
;
786 mlog(ML_ERROR
, "unable to launch ocfs2commit thread, error=%d",
797 /* 'full' flag tells us whether we clear out all blocks or if we just
798 * mark the journal clean */
799 int ocfs2_journal_wipe(struct ocfs2_journal
*journal
, int full
)
807 status
= journal_wipe(journal
->j_journal
, full
);
813 status
= ocfs2_journal_toggle_dirty(journal
->j_osb
, 0);
823 * JBD Might read a cached version of another nodes journal file. We
824 * don't want this as this file changes often and we get no
825 * notification on those changes. The only way to be sure that we've
826 * got the most up to date version of those blocks then is to force
827 * read them off disk. Just searching through the buffer cache won't
828 * work as there may be pages backing this file which are still marked
829 * up to date. We know things can't change on this file underneath us
830 * as we have the lock by now :)
832 static int ocfs2_force_read_journal(struct inode
*inode
)
836 u64 v_blkno
, p_blkno
;
837 #define CONCURRENT_JOURNAL_FILL 32
838 struct buffer_head
*bhs
[CONCURRENT_JOURNAL_FILL
];
842 BUG_ON(inode
->i_blocks
!=
843 ocfs2_align_bytes_to_sectors(i_size_read(inode
)));
845 memset(bhs
, 0, sizeof(struct buffer_head
*) * CONCURRENT_JOURNAL_FILL
);
847 mlog(0, "Force reading %llu blocks\n",
848 (unsigned long long)(inode
->i_blocks
>>
849 (inode
->i_sb
->s_blocksize_bits
- 9)));
853 (inode
->i_blocks
>> (inode
->i_sb
->s_blocksize_bits
- 9))) {
855 status
= ocfs2_extent_map_get_blocks(inode
, v_blkno
,
863 if (p_blocks
> CONCURRENT_JOURNAL_FILL
)
864 p_blocks
= CONCURRENT_JOURNAL_FILL
;
866 /* We are reading journal data which should not
867 * be put in the uptodate cache */
868 status
= ocfs2_read_blocks(OCFS2_SB(inode
->i_sb
),
869 p_blkno
, p_blocks
, bhs
, 0,
876 for(i
= 0; i
< p_blocks
; i
++) {
885 for(i
= 0; i
< CONCURRENT_JOURNAL_FILL
; i
++)
892 struct ocfs2_la_recovery_item
{
893 struct list_head lri_list
;
895 struct ocfs2_dinode
*lri_la_dinode
;
896 struct ocfs2_dinode
*lri_tl_dinode
;
899 /* Does the second half of the recovery process. By this point, the
900 * node is marked clean and can actually be considered recovered,
901 * hence it's no longer in the recovery map, but there's still some
902 * cleanup we can do which shouldn't happen within the recovery thread
903 * as locking in that context becomes very difficult if we are to take
904 * recovering nodes into account.
906 * NOTE: This function can and will sleep on recovery of other nodes
907 * during cluster locking, just like any other ocfs2 process.
909 void ocfs2_complete_recovery(void *data
)
912 struct ocfs2_super
*osb
= data
;
913 struct ocfs2_journal
*journal
= osb
->journal
;
914 struct ocfs2_dinode
*la_dinode
, *tl_dinode
;
915 struct ocfs2_la_recovery_item
*item
;
916 struct list_head
*p
, *n
;
917 LIST_HEAD(tmp_la_list
);
921 mlog(0, "completing recovery from keventd\n");
923 spin_lock(&journal
->j_lock
);
924 list_splice_init(&journal
->j_la_cleanups
, &tmp_la_list
);
925 spin_unlock(&journal
->j_lock
);
927 list_for_each_safe(p
, n
, &tmp_la_list
) {
928 item
= list_entry(p
, struct ocfs2_la_recovery_item
, lri_list
);
929 list_del_init(&item
->lri_list
);
931 mlog(0, "Complete recovery for slot %d\n", item
->lri_slot
);
933 la_dinode
= item
->lri_la_dinode
;
935 mlog(0, "Clean up local alloc %llu\n",
936 (unsigned long long)la_dinode
->i_blkno
);
938 ret
= ocfs2_complete_local_alloc_recovery(osb
,
946 tl_dinode
= item
->lri_tl_dinode
;
948 mlog(0, "Clean up truncate log %llu\n",
949 (unsigned long long)tl_dinode
->i_blkno
);
951 ret
= ocfs2_complete_truncate_log_recovery(osb
,
959 ret
= ocfs2_recover_orphans(osb
, item
->lri_slot
);
966 mlog(0, "Recovery completion\n");
970 /* NOTE: This function always eats your references to la_dinode and
971 * tl_dinode, either manually on error, or by passing them to
972 * ocfs2_complete_recovery */
973 static void ocfs2_queue_recovery_completion(struct ocfs2_journal
*journal
,
975 struct ocfs2_dinode
*la_dinode
,
976 struct ocfs2_dinode
*tl_dinode
)
978 struct ocfs2_la_recovery_item
*item
;
980 item
= kmalloc(sizeof(struct ocfs2_la_recovery_item
), GFP_NOFS
);
982 /* Though we wish to avoid it, we are in fact safe in
983 * skipping local alloc cleanup as fsck.ocfs2 is more
984 * than capable of reclaiming unused space. */
995 INIT_LIST_HEAD(&item
->lri_list
);
996 item
->lri_la_dinode
= la_dinode
;
997 item
->lri_slot
= slot_num
;
998 item
->lri_tl_dinode
= tl_dinode
;
1000 spin_lock(&journal
->j_lock
);
1001 list_add_tail(&item
->lri_list
, &journal
->j_la_cleanups
);
1002 queue_work(ocfs2_wq
, &journal
->j_recovery_work
);
1003 spin_unlock(&journal
->j_lock
);
1006 /* Called by the mount code to queue recovery the last part of
1007 * recovery for it's own slot. */
1008 void ocfs2_complete_mount_recovery(struct ocfs2_super
*osb
)
1010 struct ocfs2_journal
*journal
= osb
->journal
;
1013 /* No need to queue up our truncate_log as regular
1014 * cleanup will catch that. */
1015 ocfs2_queue_recovery_completion(journal
,
1017 osb
->local_alloc_copy
,
1019 ocfs2_schedule_truncate_log_flush(osb
, 0);
1021 osb
->local_alloc_copy
= NULL
;
1026 static int __ocfs2_recovery_thread(void *arg
)
1028 int status
, node_num
;
1029 struct ocfs2_super
*osb
= arg
;
1033 status
= ocfs2_wait_on_mount(osb
);
1039 status
= ocfs2_super_lock(osb
, 1);
1045 while(!ocfs2_node_map_is_empty(osb
, &osb
->recovery_map
)) {
1046 node_num
= ocfs2_node_map_first_set_bit(osb
,
1047 &osb
->recovery_map
);
1048 if (node_num
== O2NM_INVALID_NODE_NUM
) {
1049 mlog(0, "Out of nodes to recover.\n");
1053 status
= ocfs2_recover_node(osb
, node_num
);
1056 "Error %d recovering node %d on device (%u,%u)!\n",
1058 MAJOR(osb
->sb
->s_dev
), MINOR(osb
->sb
->s_dev
));
1059 mlog(ML_ERROR
, "Volume requires unmount.\n");
1063 ocfs2_recovery_map_clear(osb
, node_num
);
1065 ocfs2_super_unlock(osb
, 1);
1067 /* We always run recovery on our own orphan dir - the dead
1068 * node(s) may have voted "no" on an inode delete earlier. A
1069 * revote is therefore required. */
1070 ocfs2_queue_recovery_completion(osb
->journal
, osb
->slot_num
, NULL
,
1074 mutex_lock(&osb
->recovery_lock
);
1076 !ocfs2_node_map_is_empty(osb
, &osb
->recovery_map
)) {
1077 mutex_unlock(&osb
->recovery_lock
);
1081 osb
->recovery_thread_task
= NULL
;
1082 mb(); /* sync with ocfs2_recovery_thread_running */
1083 wake_up(&osb
->recovery_event
);
1085 mutex_unlock(&osb
->recovery_lock
);
1088 /* no one is callint kthread_stop() for us so the kthread() api
1089 * requires that we call do_exit(). And it isn't exported, but
1090 * complete_and_exit() seems to be a minimal wrapper around it. */
1091 complete_and_exit(NULL
, status
);
1095 void ocfs2_recovery_thread(struct ocfs2_super
*osb
, int node_num
)
1097 mlog_entry("(node_num=%d, osb->node_num = %d)\n",
1098 node_num
, osb
->node_num
);
1100 mutex_lock(&osb
->recovery_lock
);
1101 if (osb
->disable_recovery
)
1104 /* People waiting on recovery will wait on
1105 * the recovery map to empty. */
1106 if (!ocfs2_recovery_map_set(osb
, node_num
))
1107 mlog(0, "node %d already be in recovery.\n", node_num
);
1109 mlog(0, "starting recovery thread...\n");
1111 if (osb
->recovery_thread_task
)
1114 osb
->recovery_thread_task
= kthread_run(__ocfs2_recovery_thread
, osb
,
1116 if (IS_ERR(osb
->recovery_thread_task
)) {
1117 mlog_errno((int)PTR_ERR(osb
->recovery_thread_task
));
1118 osb
->recovery_thread_task
= NULL
;
1122 mutex_unlock(&osb
->recovery_lock
);
1123 wake_up(&osb
->recovery_event
);
1128 /* Does the actual journal replay and marks the journal inode as
1129 * clean. Will only replay if the journal inode is marked dirty. */
1130 static int ocfs2_replay_journal(struct ocfs2_super
*osb
,
1137 struct inode
*inode
= NULL
;
1138 struct ocfs2_dinode
*fe
;
1139 journal_t
*journal
= NULL
;
1140 struct buffer_head
*bh
= NULL
;
1142 inode
= ocfs2_get_system_file_inode(osb
, JOURNAL_SYSTEM_INODE
,
1144 if (inode
== NULL
) {
1149 if (is_bad_inode(inode
)) {
1156 SET_INODE_JOURNAL(inode
);
1158 status
= ocfs2_meta_lock_full(inode
, NULL
, &bh
, 1,
1159 OCFS2_META_LOCK_RECOVERY
);
1161 mlog(0, "status returned from ocfs2_meta_lock=%d\n", status
);
1162 if (status
!= -ERESTARTSYS
)
1163 mlog(ML_ERROR
, "Could not lock journal!\n");
1168 fe
= (struct ocfs2_dinode
*) bh
->b_data
;
1170 flags
= le32_to_cpu(fe
->id1
.journal1
.ij_flags
);
1172 if (!(flags
& OCFS2_JOURNAL_DIRTY_FL
)) {
1173 mlog(0, "No recovery required for node %d\n", node_num
);
1177 mlog(ML_NOTICE
, "Recovering node %d from slot %d on device (%u,%u)\n",
1179 MAJOR(osb
->sb
->s_dev
), MINOR(osb
->sb
->s_dev
));
1181 OCFS2_I(inode
)->ip_clusters
= le32_to_cpu(fe
->i_clusters
);
1183 status
= ocfs2_force_read_journal(inode
);
1189 mlog(0, "calling journal_init_inode\n");
1190 journal
= journal_init_inode(inode
);
1191 if (journal
== NULL
) {
1192 mlog(ML_ERROR
, "Linux journal layer error\n");
1197 status
= journal_load(journal
);
1202 journal_destroy(journal
);
1206 ocfs2_clear_journal_error(osb
->sb
, journal
, slot_num
);
1208 /* wipe the journal */
1209 mlog(0, "flushing the journal.\n");
1210 journal_lock_updates(journal
);
1211 status
= journal_flush(journal
);
1212 journal_unlock_updates(journal
);
1216 /* This will mark the node clean */
1217 flags
= le32_to_cpu(fe
->id1
.journal1
.ij_flags
);
1218 flags
&= ~OCFS2_JOURNAL_DIRTY_FL
;
1219 fe
->id1
.journal1
.ij_flags
= cpu_to_le32(flags
);
1221 status
= ocfs2_write_block(osb
, bh
, inode
);
1228 journal_destroy(journal
);
1231 /* drop the lock on this nodes journal */
1233 ocfs2_meta_unlock(inode
, 1);
1246 * Do the most important parts of node recovery:
1247 * - Replay it's journal
1248 * - Stamp a clean local allocator file
1249 * - Stamp a clean truncate log
1250 * - Mark the node clean
1252 * If this function completes without error, a node in OCFS2 can be
1253 * said to have been safely recovered. As a result, failure during the
1254 * second part of a nodes recovery process (local alloc recovery) is
1255 * far less concerning.
1257 static int ocfs2_recover_node(struct ocfs2_super
*osb
,
1262 struct ocfs2_slot_info
*si
= osb
->slot_info
;
1263 struct ocfs2_dinode
*la_copy
= NULL
;
1264 struct ocfs2_dinode
*tl_copy
= NULL
;
1266 mlog_entry("(node_num=%d, osb->node_num = %d)\n",
1267 node_num
, osb
->node_num
);
1269 mlog(0, "checking node %d\n", node_num
);
1271 /* Should not ever be called to recover ourselves -- in that
1272 * case we should've called ocfs2_journal_load instead. */
1273 BUG_ON(osb
->node_num
== node_num
);
1275 slot_num
= ocfs2_node_num_to_slot(si
, node_num
);
1276 if (slot_num
== OCFS2_INVALID_SLOT
) {
1278 mlog(0, "no slot for this node, so no recovery required.\n");
1282 mlog(0, "node %d was using slot %d\n", node_num
, slot_num
);
1284 status
= ocfs2_replay_journal(osb
, node_num
, slot_num
);
1290 /* Stamp a clean local alloc file AFTER recovering the journal... */
1291 status
= ocfs2_begin_local_alloc_recovery(osb
, slot_num
, &la_copy
);
1297 /* An error from begin_truncate_log_recovery is not
1298 * serious enough to warrant halting the rest of
1300 status
= ocfs2_begin_truncate_log_recovery(osb
, slot_num
, &tl_copy
);
1304 /* Likewise, this would be a strange but ultimately not so
1305 * harmful place to get an error... */
1306 ocfs2_clear_slot(si
, slot_num
);
1307 status
= ocfs2_update_disk_slots(osb
, si
);
1311 /* This will kfree the memory pointed to by la_copy and tl_copy */
1312 ocfs2_queue_recovery_completion(osb
->journal
, slot_num
, la_copy
,
1322 /* Test node liveness by trylocking his journal. If we get the lock,
1323 * we drop it here. Return 0 if we got the lock, -EAGAIN if node is
1324 * still alive (we couldn't get the lock) and < 0 on error. */
1325 static int ocfs2_trylock_journal(struct ocfs2_super
*osb
,
1329 struct inode
*inode
= NULL
;
1331 inode
= ocfs2_get_system_file_inode(osb
, JOURNAL_SYSTEM_INODE
,
1333 if (inode
== NULL
) {
1334 mlog(ML_ERROR
, "access error\n");
1338 if (is_bad_inode(inode
)) {
1339 mlog(ML_ERROR
, "access error (bad inode)\n");
1345 SET_INODE_JOURNAL(inode
);
1347 flags
= OCFS2_META_LOCK_RECOVERY
| OCFS2_META_LOCK_NOQUEUE
;
1348 status
= ocfs2_meta_lock_full(inode
, NULL
, NULL
, 1, flags
);
1350 if (status
!= -EAGAIN
)
1355 ocfs2_meta_unlock(inode
, 1);
1363 /* Call this underneath ocfs2_super_lock. It also assumes that the
1364 * slot info struct has been updated from disk. */
1365 int ocfs2_mark_dead_nodes(struct ocfs2_super
*osb
)
1367 int status
, i
, node_num
;
1368 struct ocfs2_slot_info
*si
= osb
->slot_info
;
1370 /* This is called with the super block cluster lock, so we
1371 * know that the slot map can't change underneath us. */
1373 spin_lock(&si
->si_lock
);
1374 for(i
= 0; i
< si
->si_num_slots
; i
++) {
1375 if (i
== osb
->slot_num
)
1377 if (ocfs2_is_empty_slot(si
, i
))
1380 node_num
= si
->si_global_node_nums
[i
];
1381 if (ocfs2_node_map_test_bit(osb
, &osb
->recovery_map
, node_num
))
1383 spin_unlock(&si
->si_lock
);
1385 /* Ok, we have a slot occupied by another node which
1386 * is not in the recovery map. We trylock his journal
1387 * file here to test if he's alive. */
1388 status
= ocfs2_trylock_journal(osb
, i
);
1390 /* Since we're called from mount, we know that
1391 * the recovery thread can't race us on
1392 * setting / checking the recovery bits. */
1393 ocfs2_recovery_thread(osb
, node_num
);
1394 } else if ((status
< 0) && (status
!= -EAGAIN
)) {
1399 spin_lock(&si
->si_lock
);
1401 spin_unlock(&si
->si_lock
);
1409 static int ocfs2_queue_orphans(struct ocfs2_super
*osb
,
1411 struct inode
**head
)
1414 struct inode
*orphan_dir_inode
= NULL
;
1416 unsigned long offset
, blk
, local
;
1417 struct buffer_head
*bh
= NULL
;
1418 struct ocfs2_dir_entry
*de
;
1419 struct super_block
*sb
= osb
->sb
;
1421 orphan_dir_inode
= ocfs2_get_system_file_inode(osb
,
1422 ORPHAN_DIR_SYSTEM_INODE
,
1424 if (!orphan_dir_inode
) {
1430 mutex_lock(&orphan_dir_inode
->i_mutex
);
1431 status
= ocfs2_meta_lock(orphan_dir_inode
, NULL
, NULL
, 0);
1439 while(offset
< i_size_read(orphan_dir_inode
)) {
1440 blk
= offset
>> sb
->s_blocksize_bits
;
1442 bh
= ocfs2_bread(orphan_dir_inode
, blk
, &status
, 0);
1453 while(offset
< i_size_read(orphan_dir_inode
)
1454 && local
< sb
->s_blocksize
) {
1455 de
= (struct ocfs2_dir_entry
*) (bh
->b_data
+ local
);
1457 if (!ocfs2_check_dir_entry(orphan_dir_inode
,
1465 local
+= le16_to_cpu(de
->rec_len
);
1466 offset
+= le16_to_cpu(de
->rec_len
);
1468 /* I guess we silently fail on no inode? */
1469 if (!le64_to_cpu(de
->inode
))
1471 if (de
->file_type
> OCFS2_FT_MAX
) {
1473 "block %llu contains invalid de: "
1474 "inode = %llu, rec_len = %u, "
1475 "name_len = %u, file_type = %u, "
1477 (unsigned long long)bh
->b_blocknr
,
1478 (unsigned long long)le64_to_cpu(de
->inode
),
1479 le16_to_cpu(de
->rec_len
),
1486 if (de
->name_len
== 1 && !strncmp(".", de
->name
, 1))
1488 if (de
->name_len
== 2 && !strncmp("..", de
->name
, 2))
1491 iter
= ocfs2_iget(osb
, le64_to_cpu(de
->inode
),
1492 OCFS2_FI_FLAG_NOLOCK
);
1496 mlog(0, "queue orphan %llu\n",
1497 (unsigned long long)OCFS2_I(iter
)->ip_blkno
);
1498 /* No locking is required for the next_orphan
1499 * queue as there is only ever a single
1500 * process doing orphan recovery. */
1501 OCFS2_I(iter
)->ip_next_orphan
= *head
;
1508 ocfs2_meta_unlock(orphan_dir_inode
, 0);
1510 mutex_unlock(&orphan_dir_inode
->i_mutex
);
1511 iput(orphan_dir_inode
);
1515 static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super
*osb
,
1520 spin_lock(&osb
->osb_lock
);
1521 ret
= !osb
->osb_orphan_wipes
[slot
];
1522 spin_unlock(&osb
->osb_lock
);
1526 static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super
*osb
,
1529 spin_lock(&osb
->osb_lock
);
1530 /* Mark ourselves such that new processes in delete_inode()
1531 * know to quit early. */
1532 ocfs2_node_map_set_bit(osb
, &osb
->osb_recovering_orphan_dirs
, slot
);
1533 while (osb
->osb_orphan_wipes
[slot
]) {
1534 /* If any processes are already in the middle of an
1535 * orphan wipe on this dir, then we need to wait for
1537 spin_unlock(&osb
->osb_lock
);
1538 wait_event_interruptible(osb
->osb_wipe_event
,
1539 ocfs2_orphan_recovery_can_continue(osb
, slot
));
1540 spin_lock(&osb
->osb_lock
);
1542 spin_unlock(&osb
->osb_lock
);
1545 static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super
*osb
,
1548 ocfs2_node_map_clear_bit(osb
, &osb
->osb_recovering_orphan_dirs
, slot
);
1552 * Orphan recovery. Each mounted node has it's own orphan dir which we
1553 * must run during recovery. Our strategy here is to build a list of
1554 * the inodes in the orphan dir and iget/iput them. The VFS does
1555 * (most) of the rest of the work.
1557 * Orphan recovery can happen at any time, not just mount so we have a
1558 * couple of extra considerations.
1560 * - We grab as many inodes as we can under the orphan dir lock -
1561 * doing iget() outside the orphan dir risks getting a reference on
1563 * - We must be sure not to deadlock with other processes on the
1564 * system wanting to run delete_inode(). This can happen when they go
1565 * to lock the orphan dir and the orphan recovery process attempts to
1566 * iget() inside the orphan dir lock. This can be avoided by
1567 * advertising our state to ocfs2_delete_inode().
1569 static int ocfs2_recover_orphans(struct ocfs2_super
*osb
,
1573 struct inode
*inode
= NULL
;
1575 struct ocfs2_inode_info
*oi
;
1577 mlog(0, "Recover inodes from orphan dir in slot %d\n", slot
);
1579 ocfs2_mark_recovering_orphan_dir(osb
, slot
);
1580 ret
= ocfs2_queue_orphans(osb
, slot
, &inode
);
1581 ocfs2_clear_recovering_orphan_dir(osb
, slot
);
1583 /* Error here should be noted, but we want to continue with as
1584 * many queued inodes as we've got. */
1589 oi
= OCFS2_I(inode
);
1590 mlog(0, "iput orphan %llu\n", (unsigned long long)oi
->ip_blkno
);
1592 iter
= oi
->ip_next_orphan
;
1594 spin_lock(&oi
->ip_lock
);
1595 /* Delete voting may have set these on the assumption
1596 * that the other node would wipe them successfully.
1597 * If they are still in the node's orphan dir, we need
1598 * to reset that state. */
1599 oi
->ip_flags
&= ~(OCFS2_INODE_DELETED
|OCFS2_INODE_SKIP_DELETE
);
1601 /* Set the proper information to get us going into
1602 * ocfs2_delete_inode. */
1603 oi
->ip_flags
|= OCFS2_INODE_MAYBE_ORPHANED
;
1604 oi
->ip_orphaned_slot
= slot
;
1605 spin_unlock(&oi
->ip_lock
);
1615 static int ocfs2_wait_on_mount(struct ocfs2_super
*osb
)
1617 /* This check is good because ocfs2 will wait on our recovery
1618 * thread before changing it to something other than MOUNTED
1620 wait_event(osb
->osb_mount_event
,
1621 atomic_read(&osb
->vol_state
) == VOLUME_MOUNTED
||
1622 atomic_read(&osb
->vol_state
) == VOLUME_DISABLED
);
1624 /* If there's an error on mount, then we may never get to the
1625 * MOUNTED flag, but this is set right before
1626 * dismount_volume() so we can trust it. */
1627 if (atomic_read(&osb
->vol_state
) == VOLUME_DISABLED
) {
1628 mlog(0, "mount error, exiting!\n");
1635 static int ocfs2_commit_thread(void *arg
)
1638 struct ocfs2_super
*osb
= arg
;
1639 struct ocfs2_journal
*journal
= osb
->journal
;
1641 /* we can trust j_num_trans here because _should_stop() is only set in
1642 * shutdown and nobody other than ourselves should be able to start
1643 * transactions. committing on shutdown might take a few iterations
1644 * as final transactions put deleted inodes on the list */
1645 while (!(kthread_should_stop() &&
1646 atomic_read(&journal
->j_num_trans
) == 0)) {
1648 wait_event_interruptible(osb
->checkpoint_event
,
1649 atomic_read(&journal
->j_num_trans
)
1650 || kthread_should_stop());
1652 status
= ocfs2_commit_cache(osb
);
1656 if (kthread_should_stop() && atomic_read(&journal
->j_num_trans
)){
1658 "commit_thread: %u transactions pending on "
1660 atomic_read(&journal
->j_num_trans
));
1667 /* Look for a dirty journal without taking any cluster locks. Used for
1668 * hard readonly access to determine whether the file system journals
1669 * require recovery. */
1670 int ocfs2_check_journals_nolocks(struct ocfs2_super
*osb
)
1674 struct buffer_head
*di_bh
;
1675 struct ocfs2_dinode
*di
;
1676 struct inode
*journal
= NULL
;
1678 for(slot
= 0; slot
< osb
->max_slots
; slot
++) {
1679 journal
= ocfs2_get_system_file_inode(osb
,
1680 JOURNAL_SYSTEM_INODE
,
1682 if (!journal
|| is_bad_inode(journal
)) {
1689 ret
= ocfs2_read_block(osb
, OCFS2_I(journal
)->ip_blkno
, &di_bh
,
1696 di
= (struct ocfs2_dinode
*) di_bh
->b_data
;
1698 if (le32_to_cpu(di
->id1
.journal1
.ij_flags
) &
1699 OCFS2_JOURNAL_DIRTY_FL
)