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 int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb,
62 static int ocfs2_trylock_journal(struct ocfs2_super *osb,
64 static int ocfs2_recover_orphans(struct ocfs2_super *osb,
66 static int ocfs2_commit_thread(void *arg);
68 static int ocfs2_commit_cache(struct ocfs2_super *osb)
73 struct ocfs2_journal *journal = NULL;
77 journal = osb->journal;
79 /* Flush all pending commits and checkpoint the journal. */
80 down_write(&journal->j_trans_barrier);
82 if (atomic_read(&journal->j_num_trans) == 0) {
83 up_write(&journal->j_trans_barrier);
84 mlog(0, "No transactions for me to flush!\n");
88 journal_lock_updates(journal->j_journal);
89 status = journal_flush(journal->j_journal);
90 journal_unlock_updates(journal->j_journal);
92 up_write(&journal->j_trans_barrier);
97 old_id = ocfs2_inc_trans_id(journal);
99 flushed = atomic_read(&journal->j_num_trans);
100 atomic_set(&journal->j_num_trans, 0);
101 up_write(&journal->j_trans_barrier);
103 mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n",
104 journal->j_trans_id, flushed);
106 ocfs2_kick_vote_thread(osb);
107 wake_up(&journal->j_checkpointed);
113 struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb)
115 struct ocfs2_journal_handle *retval = NULL;
117 retval = kcalloc(1, sizeof(*retval), GFP_NOFS);
119 mlog(ML_ERROR, "Failed to allocate memory for journal "
123 retval->k_handle = NULL;
125 retval->journal = osb->journal;
130 /* pass it NULL and it will allocate a new handle object for you. If
131 * you pass it a handle however, it may still return error, in which
132 * case it has free'd the passed handle for you. */
133 struct ocfs2_journal_handle *ocfs2_start_trans(struct ocfs2_super *osb,
134 struct ocfs2_journal_handle *handle,
138 journal_t *journal = osb->journal->j_journal;
140 mlog_entry("(max_buffs = %d)\n", max_buffs);
142 BUG_ON(!osb || !osb->journal->j_journal);
144 if (ocfs2_is_hard_readonly(osb)) {
149 BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE);
150 BUG_ON(max_buffs <= 0);
152 /* JBD might support this, but our journalling code doesn't yet. */
153 if (journal_current_handle()) {
154 mlog(ML_ERROR, "Recursive transaction attempted!\n");
159 handle = ocfs2_alloc_handle(osb);
162 mlog(ML_ERROR, "Failed to allocate memory for journal "
167 down_read(&osb->journal->j_trans_barrier);
169 /* actually start the transaction now */
170 handle->k_handle = journal_start(journal, max_buffs);
171 if (IS_ERR(handle->k_handle)) {
172 up_read(&osb->journal->j_trans_barrier);
174 ret = PTR_ERR(handle->k_handle);
175 handle->k_handle = NULL;
178 if (is_journal_aborted(journal)) {
179 ocfs2_abort(osb->sb, "Detected aborted journal");
185 atomic_inc(&(osb->journal->j_num_trans));
187 mlog_exit_ptr(handle);
198 void ocfs2_commit_trans(struct ocfs2_journal_handle *handle)
200 handle_t *jbd_handle;
202 struct ocfs2_journal *journal = handle->journal;
208 if (!handle->k_handle) {
214 /* ocfs2_extend_trans may have had to call journal_restart
215 * which will always commit the transaction, but may return
216 * error for any number of reasons. If this is the case, we
217 * clear k_handle as it's not valid any more. */
218 if (handle->k_handle) {
219 jbd_handle = handle->k_handle;
221 /* actually stop the transaction. if we've set h_sync,
222 * it'll have been committed when we return */
223 retval = journal_stop(jbd_handle);
226 mlog(ML_ERROR, "Could not commit transaction\n");
230 handle->k_handle = NULL; /* it's been free'd in journal_stop */
233 up_read(&journal->j_trans_barrier);
240 * 'nblocks' is what you want to add to the current
241 * transaction. extend_trans will either extend the current handle by
242 * nblocks, or commit it and start a new one with nblocks credits.
244 * WARNING: This will not release any semaphores or disk locks taken
245 * during the transaction, so make sure they were taken *before*
246 * start_trans or we'll have ordering deadlocks.
248 * WARNING2: Note that we do *not* drop j_trans_barrier here. This is
249 * good because transaction ids haven't yet been recorded on the
250 * cluster locks associated with this handle.
252 int ocfs2_extend_trans(handle_t *handle, int nblocks)
261 mlog(0, "Trying to extend transaction by %d blocks\n", nblocks);
263 status = journal_extend(handle, nblocks);
270 mlog(0, "journal_extend failed, trying journal_restart\n");
271 status = journal_restart(handle, nblocks);
285 int ocfs2_journal_access(struct ocfs2_journal_handle *handle,
287 struct buffer_head *bh,
296 mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n",
297 (unsigned long long)bh->b_blocknr, type,
298 (type == OCFS2_JOURNAL_ACCESS_CREATE) ?
299 "OCFS2_JOURNAL_ACCESS_CREATE" :
300 "OCFS2_JOURNAL_ACCESS_WRITE",
303 /* we can safely remove this assertion after testing. */
304 if (!buffer_uptodate(bh)) {
305 mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n");
306 mlog(ML_ERROR, "b_blocknr=%llu\n",
307 (unsigned long long)bh->b_blocknr);
311 /* Set the current transaction information on the inode so
312 * that the locking code knows whether it can drop it's locks
313 * on this inode or not. We're protected from the commit
314 * thread updating the current transaction id until
315 * ocfs2_commit_trans() because ocfs2_start_trans() took
316 * j_trans_barrier for us. */
317 ocfs2_set_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode);
319 mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
321 case OCFS2_JOURNAL_ACCESS_CREATE:
322 case OCFS2_JOURNAL_ACCESS_WRITE:
323 status = journal_get_write_access(handle->k_handle, bh);
326 case OCFS2_JOURNAL_ACCESS_UNDO:
327 status = journal_get_undo_access(handle->k_handle, bh);
332 mlog(ML_ERROR, "Uknown access type!\n");
334 mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
337 mlog(ML_ERROR, "Error %d getting %d access to buffer!\n",
344 int ocfs2_journal_dirty(struct ocfs2_journal_handle *handle,
345 struct buffer_head *bh)
349 mlog_entry("(bh->b_blocknr=%llu)\n",
350 (unsigned long long)bh->b_blocknr);
352 status = journal_dirty_metadata(handle->k_handle, bh);
354 mlog(ML_ERROR, "Could not dirty metadata buffer. "
355 "(bh->b_blocknr=%llu)\n",
356 (unsigned long long)bh->b_blocknr);
362 int ocfs2_journal_dirty_data(handle_t *handle,
363 struct buffer_head *bh)
365 int err = journal_dirty_data(handle, bh);
368 /* TODO: When we can handle it, abort the handle and go RO on
374 #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * 5)
376 void ocfs2_set_journal_params(struct ocfs2_super *osb)
378 journal_t *journal = osb->journal->j_journal;
380 spin_lock(&journal->j_state_lock);
381 journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
382 if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
383 journal->j_flags |= JFS_BARRIER;
385 journal->j_flags &= ~JFS_BARRIER;
386 spin_unlock(&journal->j_state_lock);
389 int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty)
392 struct inode *inode = NULL; /* the journal inode */
393 journal_t *j_journal = NULL;
394 struct ocfs2_dinode *di = NULL;
395 struct buffer_head *bh = NULL;
396 struct ocfs2_super *osb;
403 osb = journal->j_osb;
405 /* already have the inode for our journal */
406 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
413 if (is_bad_inode(inode)) {
414 mlog(ML_ERROR, "access error (bad inode)\n");
421 SET_INODE_JOURNAL(inode);
422 OCFS2_I(inode)->ip_open_count++;
424 /* Skip recovery waits here - journal inode metadata never
425 * changes in a live cluster so it can be considered an
426 * exception to the rule. */
427 status = ocfs2_meta_lock_full(inode, NULL, &bh, 1,
428 OCFS2_META_LOCK_RECOVERY);
430 if (status != -ERESTARTSYS)
431 mlog(ML_ERROR, "Could not get lock on journal!\n");
436 di = (struct ocfs2_dinode *)bh->b_data;
438 if (inode->i_size < OCFS2_MIN_JOURNAL_SIZE) {
439 mlog(ML_ERROR, "Journal file size (%lld) is too small!\n",
445 mlog(0, "inode->i_size = %lld\n", inode->i_size);
446 mlog(0, "inode->i_blocks = %llu\n",
447 (unsigned long long)inode->i_blocks);
448 mlog(0, "inode->ip_clusters = %u\n", OCFS2_I(inode)->ip_clusters);
450 /* call the kernels journal init function now */
451 j_journal = journal_init_inode(inode);
452 if (j_journal == NULL) {
453 mlog(ML_ERROR, "Linux journal layer error\n");
458 mlog(0, "Returned from journal_init_inode\n");
459 mlog(0, "j_journal->j_maxlen = %u\n", j_journal->j_maxlen);
461 *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) &
462 OCFS2_JOURNAL_DIRTY_FL);
464 journal->j_journal = j_journal;
465 journal->j_inode = inode;
468 ocfs2_set_journal_params(osb);
470 journal->j_state = OCFS2_JOURNAL_LOADED;
476 ocfs2_meta_unlock(inode, 1);
480 OCFS2_I(inode)->ip_open_count--;
489 static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb,
494 struct ocfs2_journal *journal = osb->journal;
495 struct buffer_head *bh = journal->j_bh;
496 struct ocfs2_dinode *fe;
500 fe = (struct ocfs2_dinode *)bh->b_data;
501 if (!OCFS2_IS_VALID_DINODE(fe)) {
502 /* This is called from startup/shutdown which will
503 * handle the errors in a specific manner, so no need
504 * to call ocfs2_error() here. */
505 mlog(ML_ERROR, "Journal dinode %llu has invalid "
506 "signature: %.*s", (unsigned long long)fe->i_blkno, 7,
512 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
514 flags |= OCFS2_JOURNAL_DIRTY_FL;
516 flags &= ~OCFS2_JOURNAL_DIRTY_FL;
517 fe->id1.journal1.ij_flags = cpu_to_le32(flags);
519 status = ocfs2_write_block(osb, bh, journal->j_inode);
529 * If the journal has been kmalloc'd it needs to be freed after this
532 void ocfs2_journal_shutdown(struct ocfs2_super *osb)
534 struct ocfs2_journal *journal = NULL;
536 struct inode *inode = NULL;
537 int num_running_trans = 0;
543 journal = osb->journal;
547 inode = journal->j_inode;
549 if (journal->j_state != OCFS2_JOURNAL_LOADED)
552 /* need to inc inode use count as journal_destroy will iput. */
556 num_running_trans = atomic_read(&(osb->journal->j_num_trans));
557 if (num_running_trans > 0)
558 mlog(0, "Shutting down journal: must wait on %d "
559 "running transactions!\n",
562 /* Do a commit_cache here. It will flush our journal, *and*
563 * release any locks that are still held.
564 * set the SHUTDOWN flag and release the trans lock.
565 * the commit thread will take the trans lock for us below. */
566 journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN;
568 /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not
569 * drop the trans_lock (which we want to hold until we
570 * completely destroy the journal. */
571 if (osb->commit_task) {
572 /* Wait for the commit thread */
573 mlog(0, "Waiting for ocfs2commit to exit....\n");
574 kthread_stop(osb->commit_task);
575 osb->commit_task = NULL;
578 BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0);
580 status = ocfs2_journal_toggle_dirty(osb, 0);
584 /* Shutdown the kernel journal system */
585 journal_destroy(journal->j_journal);
587 OCFS2_I(inode)->ip_open_count--;
589 /* unlock our journal */
590 ocfs2_meta_unlock(inode, 1);
592 brelse(journal->j_bh);
593 journal->j_bh = NULL;
595 journal->j_state = OCFS2_JOURNAL_FREE;
597 // up_write(&journal->j_trans_barrier);
604 static void ocfs2_clear_journal_error(struct super_block *sb,
610 olderr = journal_errno(journal);
612 mlog(ML_ERROR, "File system error %d recorded in "
613 "journal %u.\n", olderr, slot);
614 mlog(ML_ERROR, "File system on device %s needs checking.\n",
617 journal_ack_err(journal);
618 journal_clear_err(journal);
622 int ocfs2_journal_load(struct ocfs2_journal *journal)
625 struct ocfs2_super *osb;
632 osb = journal->j_osb;
634 status = journal_load(journal->j_journal);
636 mlog(ML_ERROR, "Failed to load journal!\n");
640 ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num);
642 status = ocfs2_journal_toggle_dirty(osb, 1);
648 /* Launch the commit thread */
649 osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt");
650 if (IS_ERR(osb->commit_task)) {
651 status = PTR_ERR(osb->commit_task);
652 osb->commit_task = NULL;
653 mlog(ML_ERROR, "unable to launch ocfs2commit thread, error=%d",
664 /* 'full' flag tells us whether we clear out all blocks or if we just
665 * mark the journal clean */
666 int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full)
674 status = journal_wipe(journal->j_journal, full);
680 status = ocfs2_journal_toggle_dirty(journal->j_osb, 0);
690 * JBD Might read a cached version of another nodes journal file. We
691 * don't want this as this file changes often and we get no
692 * notification on those changes. The only way to be sure that we've
693 * got the most up to date version of those blocks then is to force
694 * read them off disk. Just searching through the buffer cache won't
695 * work as there may be pages backing this file which are still marked
696 * up to date. We know things can't change on this file underneath us
697 * as we have the lock by now :)
699 static int ocfs2_force_read_journal(struct inode *inode)
703 u64 v_blkno, p_blkno;
704 #define CONCURRENT_JOURNAL_FILL 32
705 struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL];
709 BUG_ON(inode->i_blocks !=
710 ocfs2_align_bytes_to_sectors(i_size_read(inode)));
712 memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL);
714 mlog(0, "Force reading %llu blocks\n",
715 (unsigned long long)(inode->i_blocks >>
716 (inode->i_sb->s_blocksize_bits - 9)));
720 (inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9))) {
722 status = ocfs2_extent_map_get_blocks(inode, v_blkno,
730 if (p_blocks > CONCURRENT_JOURNAL_FILL)
731 p_blocks = CONCURRENT_JOURNAL_FILL;
733 /* We are reading journal data which should not
734 * be put in the uptodate cache */
735 status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb),
736 p_blkno, p_blocks, bhs, 0,
743 for(i = 0; i < p_blocks; i++) {
752 for(i = 0; i < CONCURRENT_JOURNAL_FILL; i++)
759 struct ocfs2_la_recovery_item {
760 struct list_head lri_list;
762 struct ocfs2_dinode *lri_la_dinode;
763 struct ocfs2_dinode *lri_tl_dinode;
766 /* Does the second half of the recovery process. By this point, the
767 * node is marked clean and can actually be considered recovered,
768 * hence it's no longer in the recovery map, but there's still some
769 * cleanup we can do which shouldn't happen within the recovery thread
770 * as locking in that context becomes very difficult if we are to take
771 * recovering nodes into account.
773 * NOTE: This function can and will sleep on recovery of other nodes
774 * during cluster locking, just like any other ocfs2 process.
776 void ocfs2_complete_recovery(void *data)
779 struct ocfs2_super *osb = data;
780 struct ocfs2_journal *journal = osb->journal;
781 struct ocfs2_dinode *la_dinode, *tl_dinode;
782 struct ocfs2_la_recovery_item *item;
783 struct list_head *p, *n;
784 LIST_HEAD(tmp_la_list);
788 mlog(0, "completing recovery from keventd\n");
790 spin_lock(&journal->j_lock);
791 list_splice_init(&journal->j_la_cleanups, &tmp_la_list);
792 spin_unlock(&journal->j_lock);
794 list_for_each_safe(p, n, &tmp_la_list) {
795 item = list_entry(p, struct ocfs2_la_recovery_item, lri_list);
796 list_del_init(&item->lri_list);
798 mlog(0, "Complete recovery for slot %d\n", item->lri_slot);
800 la_dinode = item->lri_la_dinode;
802 mlog(0, "Clean up local alloc %llu\n",
803 (unsigned long long)la_dinode->i_blkno);
805 ret = ocfs2_complete_local_alloc_recovery(osb,
813 tl_dinode = item->lri_tl_dinode;
815 mlog(0, "Clean up truncate log %llu\n",
816 (unsigned long long)tl_dinode->i_blkno);
818 ret = ocfs2_complete_truncate_log_recovery(osb,
826 ret = ocfs2_recover_orphans(osb, item->lri_slot);
833 mlog(0, "Recovery completion\n");
837 /* NOTE: This function always eats your references to la_dinode and
838 * tl_dinode, either manually on error, or by passing them to
839 * ocfs2_complete_recovery */
840 static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal,
842 struct ocfs2_dinode *la_dinode,
843 struct ocfs2_dinode *tl_dinode)
845 struct ocfs2_la_recovery_item *item;
847 item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS);
849 /* Though we wish to avoid it, we are in fact safe in
850 * skipping local alloc cleanup as fsck.ocfs2 is more
851 * than capable of reclaiming unused space. */
862 INIT_LIST_HEAD(&item->lri_list);
863 item->lri_la_dinode = la_dinode;
864 item->lri_slot = slot_num;
865 item->lri_tl_dinode = tl_dinode;
867 spin_lock(&journal->j_lock);
868 list_add_tail(&item->lri_list, &journal->j_la_cleanups);
869 queue_work(ocfs2_wq, &journal->j_recovery_work);
870 spin_unlock(&journal->j_lock);
873 /* Called by the mount code to queue recovery the last part of
874 * recovery for it's own slot. */
875 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb)
877 struct ocfs2_journal *journal = osb->journal;
880 /* No need to queue up our truncate_log as regular
881 * cleanup will catch that. */
882 ocfs2_queue_recovery_completion(journal,
884 osb->local_alloc_copy,
886 ocfs2_schedule_truncate_log_flush(osb, 0);
888 osb->local_alloc_copy = NULL;
893 static int __ocfs2_recovery_thread(void *arg)
895 int status, node_num;
896 struct ocfs2_super *osb = arg;
900 status = ocfs2_wait_on_mount(osb);
906 status = ocfs2_super_lock(osb, 1);
912 while(!ocfs2_node_map_is_empty(osb, &osb->recovery_map)) {
913 node_num = ocfs2_node_map_first_set_bit(osb,
915 if (node_num == O2NM_INVALID_NODE_NUM) {
916 mlog(0, "Out of nodes to recover.\n");
920 status = ocfs2_recover_node(osb, node_num);
923 "Error %d recovering node %d on device (%u,%u)!\n",
925 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
926 mlog(ML_ERROR, "Volume requires unmount.\n");
930 ocfs2_recovery_map_clear(osb, node_num);
932 ocfs2_super_unlock(osb, 1);
934 /* We always run recovery on our own orphan dir - the dead
935 * node(s) may have voted "no" on an inode delete earlier. A
936 * revote is therefore required. */
937 ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL,
941 mutex_lock(&osb->recovery_lock);
943 !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) {
944 mutex_unlock(&osb->recovery_lock);
948 osb->recovery_thread_task = NULL;
949 mb(); /* sync with ocfs2_recovery_thread_running */
950 wake_up(&osb->recovery_event);
952 mutex_unlock(&osb->recovery_lock);
955 /* no one is callint kthread_stop() for us so the kthread() api
956 * requires that we call do_exit(). And it isn't exported, but
957 * complete_and_exit() seems to be a minimal wrapper around it. */
958 complete_and_exit(NULL, status);
962 void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num)
964 mlog_entry("(node_num=%d, osb->node_num = %d)\n",
965 node_num, osb->node_num);
967 mutex_lock(&osb->recovery_lock);
968 if (osb->disable_recovery)
971 /* People waiting on recovery will wait on
972 * the recovery map to empty. */
973 if (!ocfs2_recovery_map_set(osb, node_num))
974 mlog(0, "node %d already be in recovery.\n", node_num);
976 mlog(0, "starting recovery thread...\n");
978 if (osb->recovery_thread_task)
981 osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb,
983 if (IS_ERR(osb->recovery_thread_task)) {
984 mlog_errno((int)PTR_ERR(osb->recovery_thread_task));
985 osb->recovery_thread_task = NULL;
989 mutex_unlock(&osb->recovery_lock);
990 wake_up(&osb->recovery_event);
995 /* Does the actual journal replay and marks the journal inode as
996 * clean. Will only replay if the journal inode is marked dirty. */
997 static int ocfs2_replay_journal(struct ocfs2_super *osb,
1004 struct inode *inode = NULL;
1005 struct ocfs2_dinode *fe;
1006 journal_t *journal = NULL;
1007 struct buffer_head *bh = NULL;
1009 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
1011 if (inode == NULL) {
1016 if (is_bad_inode(inode)) {
1023 SET_INODE_JOURNAL(inode);
1025 status = ocfs2_meta_lock_full(inode, NULL, &bh, 1,
1026 OCFS2_META_LOCK_RECOVERY);
1028 mlog(0, "status returned from ocfs2_meta_lock=%d\n", status);
1029 if (status != -ERESTARTSYS)
1030 mlog(ML_ERROR, "Could not lock journal!\n");
1035 fe = (struct ocfs2_dinode *) bh->b_data;
1037 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
1039 if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) {
1040 mlog(0, "No recovery required for node %d\n", node_num);
1044 mlog(ML_NOTICE, "Recovering node %d from slot %d on device (%u,%u)\n",
1046 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1048 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1050 status = ocfs2_force_read_journal(inode);
1056 mlog(0, "calling journal_init_inode\n");
1057 journal = journal_init_inode(inode);
1058 if (journal == NULL) {
1059 mlog(ML_ERROR, "Linux journal layer error\n");
1064 status = journal_load(journal);
1069 journal_destroy(journal);
1073 ocfs2_clear_journal_error(osb->sb, journal, slot_num);
1075 /* wipe the journal */
1076 mlog(0, "flushing the journal.\n");
1077 journal_lock_updates(journal);
1078 status = journal_flush(journal);
1079 journal_unlock_updates(journal);
1083 /* This will mark the node clean */
1084 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
1085 flags &= ~OCFS2_JOURNAL_DIRTY_FL;
1086 fe->id1.journal1.ij_flags = cpu_to_le32(flags);
1088 status = ocfs2_write_block(osb, bh, inode);
1095 journal_destroy(journal);
1098 /* drop the lock on this nodes journal */
1100 ocfs2_meta_unlock(inode, 1);
1113 * Do the most important parts of node recovery:
1114 * - Replay it's journal
1115 * - Stamp a clean local allocator file
1116 * - Stamp a clean truncate log
1117 * - Mark the node clean
1119 * If this function completes without error, a node in OCFS2 can be
1120 * said to have been safely recovered. As a result, failure during the
1121 * second part of a nodes recovery process (local alloc recovery) is
1122 * far less concerning.
1124 static int ocfs2_recover_node(struct ocfs2_super *osb,
1129 struct ocfs2_slot_info *si = osb->slot_info;
1130 struct ocfs2_dinode *la_copy = NULL;
1131 struct ocfs2_dinode *tl_copy = NULL;
1133 mlog_entry("(node_num=%d, osb->node_num = %d)\n",
1134 node_num, osb->node_num);
1136 mlog(0, "checking node %d\n", node_num);
1138 /* Should not ever be called to recover ourselves -- in that
1139 * case we should've called ocfs2_journal_load instead. */
1140 BUG_ON(osb->node_num == node_num);
1142 slot_num = ocfs2_node_num_to_slot(si, node_num);
1143 if (slot_num == OCFS2_INVALID_SLOT) {
1145 mlog(0, "no slot for this node, so no recovery required.\n");
1149 mlog(0, "node %d was using slot %d\n", node_num, slot_num);
1151 status = ocfs2_replay_journal(osb, node_num, slot_num);
1157 /* Stamp a clean local alloc file AFTER recovering the journal... */
1158 status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy);
1164 /* An error from begin_truncate_log_recovery is not
1165 * serious enough to warrant halting the rest of
1167 status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy);
1171 /* Likewise, this would be a strange but ultimately not so
1172 * harmful place to get an error... */
1173 ocfs2_clear_slot(si, slot_num);
1174 status = ocfs2_update_disk_slots(osb, si);
1178 /* This will kfree the memory pointed to by la_copy and tl_copy */
1179 ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy,
1189 /* Test node liveness by trylocking his journal. If we get the lock,
1190 * we drop it here. Return 0 if we got the lock, -EAGAIN if node is
1191 * still alive (we couldn't get the lock) and < 0 on error. */
1192 static int ocfs2_trylock_journal(struct ocfs2_super *osb,
1196 struct inode *inode = NULL;
1198 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
1200 if (inode == NULL) {
1201 mlog(ML_ERROR, "access error\n");
1205 if (is_bad_inode(inode)) {
1206 mlog(ML_ERROR, "access error (bad inode)\n");
1212 SET_INODE_JOURNAL(inode);
1214 flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE;
1215 status = ocfs2_meta_lock_full(inode, NULL, NULL, 1, flags);
1217 if (status != -EAGAIN)
1222 ocfs2_meta_unlock(inode, 1);
1230 /* Call this underneath ocfs2_super_lock. It also assumes that the
1231 * slot info struct has been updated from disk. */
1232 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
1234 int status, i, node_num;
1235 struct ocfs2_slot_info *si = osb->slot_info;
1237 /* This is called with the super block cluster lock, so we
1238 * know that the slot map can't change underneath us. */
1240 spin_lock(&si->si_lock);
1241 for(i = 0; i < si->si_num_slots; i++) {
1242 if (i == osb->slot_num)
1244 if (ocfs2_is_empty_slot(si, i))
1247 node_num = si->si_global_node_nums[i];
1248 if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num))
1250 spin_unlock(&si->si_lock);
1252 /* Ok, we have a slot occupied by another node which
1253 * is not in the recovery map. We trylock his journal
1254 * file here to test if he's alive. */
1255 status = ocfs2_trylock_journal(osb, i);
1257 /* Since we're called from mount, we know that
1258 * the recovery thread can't race us on
1259 * setting / checking the recovery bits. */
1260 ocfs2_recovery_thread(osb, node_num);
1261 } else if ((status < 0) && (status != -EAGAIN)) {
1266 spin_lock(&si->si_lock);
1268 spin_unlock(&si->si_lock);
1276 static int ocfs2_queue_orphans(struct ocfs2_super *osb,
1278 struct inode **head)
1281 struct inode *orphan_dir_inode = NULL;
1283 unsigned long offset, blk, local;
1284 struct buffer_head *bh = NULL;
1285 struct ocfs2_dir_entry *de;
1286 struct super_block *sb = osb->sb;
1288 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1289 ORPHAN_DIR_SYSTEM_INODE,
1291 if (!orphan_dir_inode) {
1297 mutex_lock(&orphan_dir_inode->i_mutex);
1298 status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0);
1306 while(offset < i_size_read(orphan_dir_inode)) {
1307 blk = offset >> sb->s_blocksize_bits;
1309 bh = ocfs2_bread(orphan_dir_inode, blk, &status, 0);
1320 while(offset < i_size_read(orphan_dir_inode)
1321 && local < sb->s_blocksize) {
1322 de = (struct ocfs2_dir_entry *) (bh->b_data + local);
1324 if (!ocfs2_check_dir_entry(orphan_dir_inode,
1332 local += le16_to_cpu(de->rec_len);
1333 offset += le16_to_cpu(de->rec_len);
1335 /* I guess we silently fail on no inode? */
1336 if (!le64_to_cpu(de->inode))
1338 if (de->file_type > OCFS2_FT_MAX) {
1340 "block %llu contains invalid de: "
1341 "inode = %llu, rec_len = %u, "
1342 "name_len = %u, file_type = %u, "
1344 (unsigned long long)bh->b_blocknr,
1345 (unsigned long long)le64_to_cpu(de->inode),
1346 le16_to_cpu(de->rec_len),
1353 if (de->name_len == 1 && !strncmp(".", de->name, 1))
1355 if (de->name_len == 2 && !strncmp("..", de->name, 2))
1358 iter = ocfs2_iget(osb, le64_to_cpu(de->inode),
1359 OCFS2_FI_FLAG_NOLOCK);
1363 mlog(0, "queue orphan %llu\n",
1364 (unsigned long long)OCFS2_I(iter)->ip_blkno);
1365 /* No locking is required for the next_orphan
1366 * queue as there is only ever a single
1367 * process doing orphan recovery. */
1368 OCFS2_I(iter)->ip_next_orphan = *head;
1375 ocfs2_meta_unlock(orphan_dir_inode, 0);
1377 mutex_unlock(&orphan_dir_inode->i_mutex);
1378 iput(orphan_dir_inode);
1382 static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb,
1387 spin_lock(&osb->osb_lock);
1388 ret = !osb->osb_orphan_wipes[slot];
1389 spin_unlock(&osb->osb_lock);
1393 static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb,
1396 spin_lock(&osb->osb_lock);
1397 /* Mark ourselves such that new processes in delete_inode()
1398 * know to quit early. */
1399 ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot);
1400 while (osb->osb_orphan_wipes[slot]) {
1401 /* If any processes are already in the middle of an
1402 * orphan wipe on this dir, then we need to wait for
1404 spin_unlock(&osb->osb_lock);
1405 wait_event_interruptible(osb->osb_wipe_event,
1406 ocfs2_orphan_recovery_can_continue(osb, slot));
1407 spin_lock(&osb->osb_lock);
1409 spin_unlock(&osb->osb_lock);
1412 static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb,
1415 ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot);
1419 * Orphan recovery. Each mounted node has it's own orphan dir which we
1420 * must run during recovery. Our strategy here is to build a list of
1421 * the inodes in the orphan dir and iget/iput them. The VFS does
1422 * (most) of the rest of the work.
1424 * Orphan recovery can happen at any time, not just mount so we have a
1425 * couple of extra considerations.
1427 * - We grab as many inodes as we can under the orphan dir lock -
1428 * doing iget() outside the orphan dir risks getting a reference on
1430 * - We must be sure not to deadlock with other processes on the
1431 * system wanting to run delete_inode(). This can happen when they go
1432 * to lock the orphan dir and the orphan recovery process attempts to
1433 * iget() inside the orphan dir lock. This can be avoided by
1434 * advertising our state to ocfs2_delete_inode().
1436 static int ocfs2_recover_orphans(struct ocfs2_super *osb,
1440 struct inode *inode = NULL;
1442 struct ocfs2_inode_info *oi;
1444 mlog(0, "Recover inodes from orphan dir in slot %d\n", slot);
1446 ocfs2_mark_recovering_orphan_dir(osb, slot);
1447 ret = ocfs2_queue_orphans(osb, slot, &inode);
1448 ocfs2_clear_recovering_orphan_dir(osb, slot);
1450 /* Error here should be noted, but we want to continue with as
1451 * many queued inodes as we've got. */
1456 oi = OCFS2_I(inode);
1457 mlog(0, "iput orphan %llu\n", (unsigned long long)oi->ip_blkno);
1459 iter = oi->ip_next_orphan;
1461 spin_lock(&oi->ip_lock);
1462 /* Delete voting may have set these on the assumption
1463 * that the other node would wipe them successfully.
1464 * If they are still in the node's orphan dir, we need
1465 * to reset that state. */
1466 oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE);
1468 /* Set the proper information to get us going into
1469 * ocfs2_delete_inode. */
1470 oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED;
1471 oi->ip_orphaned_slot = slot;
1472 spin_unlock(&oi->ip_lock);
1482 static int ocfs2_wait_on_mount(struct ocfs2_super *osb)
1484 /* This check is good because ocfs2 will wait on our recovery
1485 * thread before changing it to something other than MOUNTED
1487 wait_event(osb->osb_mount_event,
1488 atomic_read(&osb->vol_state) == VOLUME_MOUNTED ||
1489 atomic_read(&osb->vol_state) == VOLUME_DISABLED);
1491 /* If there's an error on mount, then we may never get to the
1492 * MOUNTED flag, but this is set right before
1493 * dismount_volume() so we can trust it. */
1494 if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) {
1495 mlog(0, "mount error, exiting!\n");
1502 static int ocfs2_commit_thread(void *arg)
1505 struct ocfs2_super *osb = arg;
1506 struct ocfs2_journal *journal = osb->journal;
1508 /* we can trust j_num_trans here because _should_stop() is only set in
1509 * shutdown and nobody other than ourselves should be able to start
1510 * transactions. committing on shutdown might take a few iterations
1511 * as final transactions put deleted inodes on the list */
1512 while (!(kthread_should_stop() &&
1513 atomic_read(&journal->j_num_trans) == 0)) {
1515 wait_event_interruptible(osb->checkpoint_event,
1516 atomic_read(&journal->j_num_trans)
1517 || kthread_should_stop());
1519 status = ocfs2_commit_cache(osb);
1523 if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){
1525 "commit_thread: %u transactions pending on "
1527 atomic_read(&journal->j_num_trans));
1534 /* Look for a dirty journal without taking any cluster locks. Used for
1535 * hard readonly access to determine whether the file system journals
1536 * require recovery. */
1537 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb)
1541 struct buffer_head *di_bh;
1542 struct ocfs2_dinode *di;
1543 struct inode *journal = NULL;
1545 for(slot = 0; slot < osb->max_slots; slot++) {
1546 journal = ocfs2_get_system_file_inode(osb,
1547 JOURNAL_SYSTEM_INODE,
1549 if (!journal || is_bad_inode(journal)) {
1556 ret = ocfs2_read_block(osb, OCFS2_I(journal)->ip_blkno, &di_bh,
1563 di = (struct ocfs2_dinode *) di_bh->b_data;
1565 if (le32_to_cpu(di->id1.journal1.ij_flags) &
1566 OCFS2_JOURNAL_DIRTY_FL)