1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * journal.c
6 *
7 * Defines functions of journalling api
8 *
9 * Copyright (C) 2003, 2004 Oracle. All rights reserved.
10 */
11
12 #include <linux/fs.h>
13 #include <linux/types.h>
14 #include <linux/slab.h>
15 #include <linux/highmem.h>
16 #include <linux/kthread.h>
17 #include <linux/time.h>
18 #include <linux/random.h>
19 #include <linux/delay.h>
20
21 #include <cluster/masklog.h>
22
23 #include "ocfs2.h"
24
25 #include "alloc.h"
26 #include "blockcheck.h"
27 #include "dir.h"
28 #include "dlmglue.h"
29 #include "extent_map.h"
30 #include "heartbeat.h"
31 #include "inode.h"
32 #include "journal.h"
33 #include "localalloc.h"
34 #include "slot_map.h"
35 #include "super.h"
36 #include "sysfile.h"
37 #include "uptodate.h"
38 #include "quota.h"
39 #include "file.h"
40 #include "namei.h"
41
42 #include "buffer_head_io.h"
43 #include "ocfs2_trace.h"
44
45 DEFINE_SPINLOCK(trans_inc_lock);
46
47 #define ORPHAN_SCAN_SCHEDULE_TIMEOUT 300000
48
49 static int ocfs2_force_read_journal(struct inode *inode);
50 static int ocfs2_recover_node(struct ocfs2_super *osb,
51 int node_num, int slot_num);
52 static int __ocfs2_recovery_thread(void *arg);
53 static int ocfs2_commit_cache(struct ocfs2_super *osb);
54 static int __ocfs2_wait_on_mount(struct ocfs2_super *osb, int quota);
55 static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb,
56 int dirty, int replayed);
57 static int ocfs2_trylock_journal(struct ocfs2_super *osb,
58 int slot_num);
59 static int ocfs2_recover_orphans(struct ocfs2_super *osb,
60 int slot,
61 enum ocfs2_orphan_reco_type orphan_reco_type);
62 static int ocfs2_commit_thread(void *arg);
63 static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal,
64 int slot_num,
65 struct ocfs2_dinode *la_dinode,
66 struct ocfs2_dinode *tl_dinode,
67 struct ocfs2_quota_recovery *qrec,
68 enum ocfs2_orphan_reco_type orphan_reco_type);
69
ocfs2_wait_on_mount(struct ocfs2_super * osb)70 static inline int ocfs2_wait_on_mount(struct ocfs2_super *osb)
71 {
72 return __ocfs2_wait_on_mount(osb, 0);
73 }
74
ocfs2_wait_on_quotas(struct ocfs2_super * osb)75 static inline int ocfs2_wait_on_quotas(struct ocfs2_super *osb)
76 {
77 return __ocfs2_wait_on_mount(osb, 1);
78 }
79
80 /*
81 * This replay_map is to track online/offline slots, so we could recover
82 * offline slots during recovery and mount
83 */
84
85 enum ocfs2_replay_state {
86 REPLAY_UNNEEDED = 0, /* Replay is not needed, so ignore this map */
87 REPLAY_NEEDED, /* Replay slots marked in rm_replay_slots */
88 REPLAY_DONE /* Replay was already queued */
89 };
90
91 struct ocfs2_replay_map {
92 unsigned int rm_slots;
93 enum ocfs2_replay_state rm_state;
94 unsigned char rm_replay_slots[0];
95 };
96
ocfs2_replay_map_set_state(struct ocfs2_super * osb,int state)97 static void ocfs2_replay_map_set_state(struct ocfs2_super *osb, int state)
98 {
99 if (!osb->replay_map)
100 return;
101
102 /* If we've already queued the replay, we don't have any more to do */
103 if (osb->replay_map->rm_state == REPLAY_DONE)
104 return;
105
106 osb->replay_map->rm_state = state;
107 }
108
ocfs2_compute_replay_slots(struct ocfs2_super * osb)109 int ocfs2_compute_replay_slots(struct ocfs2_super *osb)
110 {
111 struct ocfs2_replay_map *replay_map;
112 int i, node_num;
113
114 /* If replay map is already set, we don't do it again */
115 if (osb->replay_map)
116 return 0;
117
118 replay_map = kzalloc(sizeof(struct ocfs2_replay_map) +
119 (osb->max_slots * sizeof(char)), GFP_KERNEL);
120
121 if (!replay_map) {
122 mlog_errno(-ENOMEM);
123 return -ENOMEM;
124 }
125
126 spin_lock(&osb->osb_lock);
127
128 replay_map->rm_slots = osb->max_slots;
129 replay_map->rm_state = REPLAY_UNNEEDED;
130
131 /* set rm_replay_slots for offline slot(s) */
132 for (i = 0; i < replay_map->rm_slots; i++) {
133 if (ocfs2_slot_to_node_num_locked(osb, i, &node_num) == -ENOENT)
134 replay_map->rm_replay_slots[i] = 1;
135 }
136
137 osb->replay_map = replay_map;
138 spin_unlock(&osb->osb_lock);
139 return 0;
140 }
141
ocfs2_queue_replay_slots(struct ocfs2_super * osb,enum ocfs2_orphan_reco_type orphan_reco_type)142 static void ocfs2_queue_replay_slots(struct ocfs2_super *osb,
143 enum ocfs2_orphan_reco_type orphan_reco_type)
144 {
145 struct ocfs2_replay_map *replay_map = osb->replay_map;
146 int i;
147
148 if (!replay_map)
149 return;
150
151 if (replay_map->rm_state != REPLAY_NEEDED)
152 return;
153
154 for (i = 0; i < replay_map->rm_slots; i++)
155 if (replay_map->rm_replay_slots[i])
156 ocfs2_queue_recovery_completion(osb->journal, i, NULL,
157 NULL, NULL,
158 orphan_reco_type);
159 replay_map->rm_state = REPLAY_DONE;
160 }
161
ocfs2_free_replay_slots(struct ocfs2_super * osb)162 void ocfs2_free_replay_slots(struct ocfs2_super *osb)
163 {
164 struct ocfs2_replay_map *replay_map = osb->replay_map;
165
166 if (!osb->replay_map)
167 return;
168
169 kfree(replay_map);
170 osb->replay_map = NULL;
171 }
172
ocfs2_recovery_init(struct ocfs2_super * osb)173 int ocfs2_recovery_init(struct ocfs2_super *osb)
174 {
175 struct ocfs2_recovery_map *rm;
176
177 mutex_init(&osb->recovery_lock);
178 osb->disable_recovery = 0;
179 osb->recovery_thread_task = NULL;
180 init_waitqueue_head(&osb->recovery_event);
181
182 rm = kzalloc(sizeof(struct ocfs2_recovery_map) +
183 osb->max_slots * sizeof(unsigned int),
184 GFP_KERNEL);
185 if (!rm) {
186 mlog_errno(-ENOMEM);
187 return -ENOMEM;
188 }
189
190 rm->rm_entries = (unsigned int *)((char *)rm +
191 sizeof(struct ocfs2_recovery_map));
192 osb->recovery_map = rm;
193
194 return 0;
195 }
196
197 /* we can't grab the goofy sem lock from inside wait_event, so we use
198 * memory barriers to make sure that we'll see the null task before
199 * being woken up */
ocfs2_recovery_thread_running(struct ocfs2_super * osb)200 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
201 {
202 mb();
203 return osb->recovery_thread_task != NULL;
204 }
205
ocfs2_recovery_exit(struct ocfs2_super * osb)206 void ocfs2_recovery_exit(struct ocfs2_super *osb)
207 {
208 struct ocfs2_recovery_map *rm;
209
210 /* disable any new recovery threads and wait for any currently
211 * running ones to exit. Do this before setting the vol_state. */
212 mutex_lock(&osb->recovery_lock);
213 osb->disable_recovery = 1;
214 mutex_unlock(&osb->recovery_lock);
215 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
216
217 /* At this point, we know that no more recovery threads can be
218 * launched, so wait for any recovery completion work to
219 * complete. */
220 if (osb->ocfs2_wq)
221 flush_workqueue(osb->ocfs2_wq);
222
223 /*
224 * Now that recovery is shut down, and the osb is about to be
225 * freed, the osb_lock is not taken here.
226 */
227 rm = osb->recovery_map;
228 /* XXX: Should we bug if there are dirty entries? */
229
230 kfree(rm);
231 }
232
__ocfs2_recovery_map_test(struct ocfs2_super * osb,unsigned int node_num)233 static int __ocfs2_recovery_map_test(struct ocfs2_super *osb,
234 unsigned int node_num)
235 {
236 int i;
237 struct ocfs2_recovery_map *rm = osb->recovery_map;
238
239 assert_spin_locked(&osb->osb_lock);
240
241 for (i = 0; i < rm->rm_used; i++) {
242 if (rm->rm_entries[i] == node_num)
243 return 1;
244 }
245
246 return 0;
247 }
248
249 /* Behaves like test-and-set. Returns the previous value */
ocfs2_recovery_map_set(struct ocfs2_super * osb,unsigned int node_num)250 static int ocfs2_recovery_map_set(struct ocfs2_super *osb,
251 unsigned int node_num)
252 {
253 struct ocfs2_recovery_map *rm = osb->recovery_map;
254
255 spin_lock(&osb->osb_lock);
256 if (__ocfs2_recovery_map_test(osb, node_num)) {
257 spin_unlock(&osb->osb_lock);
258 return 1;
259 }
260
261 /* XXX: Can this be exploited? Not from o2dlm... */
262 BUG_ON(rm->rm_used >= osb->max_slots);
263
264 rm->rm_entries[rm->rm_used] = node_num;
265 rm->rm_used++;
266 spin_unlock(&osb->osb_lock);
267
268 return 0;
269 }
270
ocfs2_recovery_map_clear(struct ocfs2_super * osb,unsigned int node_num)271 static void ocfs2_recovery_map_clear(struct ocfs2_super *osb,
272 unsigned int node_num)
273 {
274 int i;
275 struct ocfs2_recovery_map *rm = osb->recovery_map;
276
277 spin_lock(&osb->osb_lock);
278
279 for (i = 0; i < rm->rm_used; i++) {
280 if (rm->rm_entries[i] == node_num)
281 break;
282 }
283
284 if (i < rm->rm_used) {
285 /* XXX: be careful with the pointer math */
286 memmove(&(rm->rm_entries[i]), &(rm->rm_entries[i + 1]),
287 (rm->rm_used - i - 1) * sizeof(unsigned int));
288 rm->rm_used--;
289 }
290
291 spin_unlock(&osb->osb_lock);
292 }
293
ocfs2_commit_cache(struct ocfs2_super * osb)294 static int ocfs2_commit_cache(struct ocfs2_super *osb)
295 {
296 int status = 0;
297 unsigned int flushed;
298 struct ocfs2_journal *journal = NULL;
299
300 journal = osb->journal;
301
302 /* Flush all pending commits and checkpoint the journal. */
303 down_write(&journal->j_trans_barrier);
304
305 flushed = atomic_read(&journal->j_num_trans);
306 trace_ocfs2_commit_cache_begin(flushed);
307 if (flushed == 0) {
308 up_write(&journal->j_trans_barrier);
309 goto finally;
310 }
311
312 jbd2_journal_lock_updates(journal->j_journal);
313 status = jbd2_journal_flush(journal->j_journal);
314 jbd2_journal_unlock_updates(journal->j_journal);
315 if (status < 0) {
316 up_write(&journal->j_trans_barrier);
317 mlog_errno(status);
318 goto finally;
319 }
320
321 ocfs2_inc_trans_id(journal);
322
323 flushed = atomic_read(&journal->j_num_trans);
324 atomic_set(&journal->j_num_trans, 0);
325 up_write(&journal->j_trans_barrier);
326
327 trace_ocfs2_commit_cache_end(journal->j_trans_id, flushed);
328
329 ocfs2_wake_downconvert_thread(osb);
330 wake_up(&journal->j_checkpointed);
331 finally:
332 return status;
333 }
334
ocfs2_start_trans(struct ocfs2_super * osb,int max_buffs)335 handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs)
336 {
337 journal_t *journal = osb->journal->j_journal;
338 handle_t *handle;
339
340 BUG_ON(!osb || !osb->journal->j_journal);
341
342 if (ocfs2_is_hard_readonly(osb))
343 return ERR_PTR(-EROFS);
344
345 BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE);
346 BUG_ON(max_buffs <= 0);
347
348 /* Nested transaction? Just return the handle... */
349 if (journal_current_handle())
350 return jbd2_journal_start(journal, max_buffs);
351
352 sb_start_intwrite(osb->sb);
353
354 down_read(&osb->journal->j_trans_barrier);
355
356 handle = jbd2_journal_start(journal, max_buffs);
357 if (IS_ERR(handle)) {
358 up_read(&osb->journal->j_trans_barrier);
359 sb_end_intwrite(osb->sb);
360
361 mlog_errno(PTR_ERR(handle));
362
363 if (is_journal_aborted(journal)) {
364 ocfs2_abort(osb->sb, "Detected aborted journal\n");
365 handle = ERR_PTR(-EROFS);
366 }
367 } else {
368 if (!ocfs2_mount_local(osb))
369 atomic_inc(&(osb->journal->j_num_trans));
370 }
371
372 return handle;
373 }
374
ocfs2_commit_trans(struct ocfs2_super * osb,handle_t * handle)375 int ocfs2_commit_trans(struct ocfs2_super *osb,
376 handle_t *handle)
377 {
378 int ret, nested;
379 struct ocfs2_journal *journal = osb->journal;
380
381 BUG_ON(!handle);
382
383 nested = handle->h_ref > 1;
384 ret = jbd2_journal_stop(handle);
385 if (ret < 0)
386 mlog_errno(ret);
387
388 if (!nested) {
389 up_read(&journal->j_trans_barrier);
390 sb_end_intwrite(osb->sb);
391 }
392
393 return ret;
394 }
395
396 /*
397 * 'nblocks' is what you want to add to the current transaction.
398 *
399 * This might call jbd2_journal_restart() which will commit dirty buffers
400 * and then restart the transaction. Before calling
401 * ocfs2_extend_trans(), any changed blocks should have been
402 * dirtied. After calling it, all blocks which need to be changed must
403 * go through another set of journal_access/journal_dirty calls.
404 *
405 * WARNING: This will not release any semaphores or disk locks taken
406 * during the transaction, so make sure they were taken *before*
407 * start_trans or we'll have ordering deadlocks.
408 *
409 * WARNING2: Note that we do *not* drop j_trans_barrier here. This is
410 * good because transaction ids haven't yet been recorded on the
411 * cluster locks associated with this handle.
412 */
ocfs2_extend_trans(handle_t * handle,int nblocks)413 int ocfs2_extend_trans(handle_t *handle, int nblocks)
414 {
415 int status, old_nblocks;
416
417 BUG_ON(!handle);
418 BUG_ON(nblocks < 0);
419
420 if (!nblocks)
421 return 0;
422
423 old_nblocks = handle->h_buffer_credits;
424
425 trace_ocfs2_extend_trans(old_nblocks, nblocks);
426
427 #ifdef CONFIG_OCFS2_DEBUG_FS
428 status = 1;
429 #else
430 status = jbd2_journal_extend(handle, nblocks);
431 if (status < 0) {
432 mlog_errno(status);
433 goto bail;
434 }
435 #endif
436
437 if (status > 0) {
438 trace_ocfs2_extend_trans_restart(old_nblocks + nblocks);
439 status = jbd2_journal_restart(handle,
440 old_nblocks + nblocks);
441 if (status < 0) {
442 mlog_errno(status);
443 goto bail;
444 }
445 }
446
447 status = 0;
448 bail:
449 return status;
450 }
451
452 /*
453 * If we have fewer than thresh credits, extend by OCFS2_MAX_TRANS_DATA.
454 * If that fails, restart the transaction & regain write access for the
455 * buffer head which is used for metadata modifications.
456 * Taken from Ext4: extend_or_restart_transaction()
457 */
ocfs2_allocate_extend_trans(handle_t * handle,int thresh)458 int ocfs2_allocate_extend_trans(handle_t *handle, int thresh)
459 {
460 int status, old_nblks;
461
462 BUG_ON(!handle);
463
464 old_nblks = handle->h_buffer_credits;
465 trace_ocfs2_allocate_extend_trans(old_nblks, thresh);
466
467 if (old_nblks < thresh)
468 return 0;
469
470 status = jbd2_journal_extend(handle, OCFS2_MAX_TRANS_DATA);
471 if (status < 0) {
472 mlog_errno(status);
473 goto bail;
474 }
475
476 if (status > 0) {
477 status = jbd2_journal_restart(handle, OCFS2_MAX_TRANS_DATA);
478 if (status < 0)
479 mlog_errno(status);
480 }
481
482 bail:
483 return status;
484 }
485
486
487 struct ocfs2_triggers {
488 struct jbd2_buffer_trigger_type ot_triggers;
489 int ot_offset;
490 };
491
to_ocfs2_trigger(struct jbd2_buffer_trigger_type * triggers)492 static inline struct ocfs2_triggers *to_ocfs2_trigger(struct jbd2_buffer_trigger_type *triggers)
493 {
494 return container_of(triggers, struct ocfs2_triggers, ot_triggers);
495 }
496
ocfs2_frozen_trigger(struct jbd2_buffer_trigger_type * triggers,struct buffer_head * bh,void * data,size_t size)497 static void ocfs2_frozen_trigger(struct jbd2_buffer_trigger_type *triggers,
498 struct buffer_head *bh,
499 void *data, size_t size)
500 {
501 struct ocfs2_triggers *ot = to_ocfs2_trigger(triggers);
502
503 /*
504 * We aren't guaranteed to have the superblock here, so we
505 * must unconditionally compute the ecc data.
506 * __ocfs2_journal_access() will only set the triggers if
507 * metaecc is enabled.
508 */
509 ocfs2_block_check_compute(data, size, data + ot->ot_offset);
510 }
511
512 /*
513 * Quota blocks have their own trigger because the struct ocfs2_block_check
514 * offset depends on the blocksize.
515 */
ocfs2_dq_frozen_trigger(struct jbd2_buffer_trigger_type * triggers,struct buffer_head * bh,void * data,size_t size)516 static void ocfs2_dq_frozen_trigger(struct jbd2_buffer_trigger_type *triggers,
517 struct buffer_head *bh,
518 void *data, size_t size)
519 {
520 struct ocfs2_disk_dqtrailer *dqt =
521 ocfs2_block_dqtrailer(size, data);
522
523 /*
524 * We aren't guaranteed to have the superblock here, so we
525 * must unconditionally compute the ecc data.
526 * __ocfs2_journal_access() will only set the triggers if
527 * metaecc is enabled.
528 */
529 ocfs2_block_check_compute(data, size, &dqt->dq_check);
530 }
531
532 /*
533 * Directory blocks also have their own trigger because the
534 * struct ocfs2_block_check offset depends on the blocksize.
535 */
ocfs2_db_frozen_trigger(struct jbd2_buffer_trigger_type * triggers,struct buffer_head * bh,void * data,size_t size)536 static void ocfs2_db_frozen_trigger(struct jbd2_buffer_trigger_type *triggers,
537 struct buffer_head *bh,
538 void *data, size_t size)
539 {
540 struct ocfs2_dir_block_trailer *trailer =
541 ocfs2_dir_trailer_from_size(size, data);
542
543 /*
544 * We aren't guaranteed to have the superblock here, so we
545 * must unconditionally compute the ecc data.
546 * __ocfs2_journal_access() will only set the triggers if
547 * metaecc is enabled.
548 */
549 ocfs2_block_check_compute(data, size, &trailer->db_check);
550 }
551
ocfs2_abort_trigger(struct jbd2_buffer_trigger_type * triggers,struct buffer_head * bh)552 static void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *triggers,
553 struct buffer_head *bh)
554 {
555 mlog(ML_ERROR,
556 "ocfs2_abort_trigger called by JBD2. bh = 0x%lx, "
557 "bh->b_blocknr = %llu\n",
558 (unsigned long)bh,
559 (unsigned long long)bh->b_blocknr);
560
561 ocfs2_error(bh->b_bdev->bd_super,
562 "JBD2 has aborted our journal, ocfs2 cannot continue\n");
563 }
564
565 static struct ocfs2_triggers di_triggers = {
566 .ot_triggers = {
567 .t_frozen = ocfs2_frozen_trigger,
568 .t_abort = ocfs2_abort_trigger,
569 },
570 .ot_offset = offsetof(struct ocfs2_dinode, i_check),
571 };
572
573 static struct ocfs2_triggers eb_triggers = {
574 .ot_triggers = {
575 .t_frozen = ocfs2_frozen_trigger,
576 .t_abort = ocfs2_abort_trigger,
577 },
578 .ot_offset = offsetof(struct ocfs2_extent_block, h_check),
579 };
580
581 static struct ocfs2_triggers rb_triggers = {
582 .ot_triggers = {
583 .t_frozen = ocfs2_frozen_trigger,
584 .t_abort = ocfs2_abort_trigger,
585 },
586 .ot_offset = offsetof(struct ocfs2_refcount_block, rf_check),
587 };
588
589 static struct ocfs2_triggers gd_triggers = {
590 .ot_triggers = {
591 .t_frozen = ocfs2_frozen_trigger,
592 .t_abort = ocfs2_abort_trigger,
593 },
594 .ot_offset = offsetof(struct ocfs2_group_desc, bg_check),
595 };
596
597 static struct ocfs2_triggers db_triggers = {
598 .ot_triggers = {
599 .t_frozen = ocfs2_db_frozen_trigger,
600 .t_abort = ocfs2_abort_trigger,
601 },
602 };
603
604 static struct ocfs2_triggers xb_triggers = {
605 .ot_triggers = {
606 .t_frozen = ocfs2_frozen_trigger,
607 .t_abort = ocfs2_abort_trigger,
608 },
609 .ot_offset = offsetof(struct ocfs2_xattr_block, xb_check),
610 };
611
612 static struct ocfs2_triggers dq_triggers = {
613 .ot_triggers = {
614 .t_frozen = ocfs2_dq_frozen_trigger,
615 .t_abort = ocfs2_abort_trigger,
616 },
617 };
618
619 static struct ocfs2_triggers dr_triggers = {
620 .ot_triggers = {
621 .t_frozen = ocfs2_frozen_trigger,
622 .t_abort = ocfs2_abort_trigger,
623 },
624 .ot_offset = offsetof(struct ocfs2_dx_root_block, dr_check),
625 };
626
627 static struct ocfs2_triggers dl_triggers = {
628 .ot_triggers = {
629 .t_frozen = ocfs2_frozen_trigger,
630 .t_abort = ocfs2_abort_trigger,
631 },
632 .ot_offset = offsetof(struct ocfs2_dx_leaf, dl_check),
633 };
634
__ocfs2_journal_access(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,struct ocfs2_triggers * triggers,int type)635 static int __ocfs2_journal_access(handle_t *handle,
636 struct ocfs2_caching_info *ci,
637 struct buffer_head *bh,
638 struct ocfs2_triggers *triggers,
639 int type)
640 {
641 int status;
642 struct ocfs2_super *osb =
643 OCFS2_SB(ocfs2_metadata_cache_get_super(ci));
644
645 BUG_ON(!ci || !ci->ci_ops);
646 BUG_ON(!handle);
647 BUG_ON(!bh);
648
649 trace_ocfs2_journal_access(
650 (unsigned long long)ocfs2_metadata_cache_owner(ci),
651 (unsigned long long)bh->b_blocknr, type, bh->b_size);
652
653 /* we can safely remove this assertion after testing. */
654 if (!buffer_uptodate(bh)) {
655 mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n");
656 mlog(ML_ERROR, "b_blocknr=%llu, b_state=0x%lx\n",
657 (unsigned long long)bh->b_blocknr, bh->b_state);
658
659 lock_buffer(bh);
660 /*
661 * A previous transaction with a couple of buffer heads fail
662 * to checkpoint, so all the bhs are marked as BH_Write_EIO.
663 * For current transaction, the bh is just among those error
664 * bhs which previous transaction handle. We can't just clear
665 * its BH_Write_EIO and reuse directly, since other bhs are
666 * not written to disk yet and that will cause metadata
667 * inconsistency. So we should set fs read-only to avoid
668 * further damage.
669 */
670 if (buffer_write_io_error(bh) && !buffer_uptodate(bh)) {
671 unlock_buffer(bh);
672 return ocfs2_error(osb->sb, "A previous attempt to "
673 "write this buffer head failed\n");
674 }
675 unlock_buffer(bh);
676 }
677
678 /* Set the current transaction information on the ci so
679 * that the locking code knows whether it can drop it's locks
680 * on this ci or not. We're protected from the commit
681 * thread updating the current transaction id until
682 * ocfs2_commit_trans() because ocfs2_start_trans() took
683 * j_trans_barrier for us. */
684 ocfs2_set_ci_lock_trans(osb->journal, ci);
685
686 ocfs2_metadata_cache_io_lock(ci);
687 switch (type) {
688 case OCFS2_JOURNAL_ACCESS_CREATE:
689 case OCFS2_JOURNAL_ACCESS_WRITE:
690 status = jbd2_journal_get_write_access(handle, bh);
691 break;
692
693 case OCFS2_JOURNAL_ACCESS_UNDO:
694 status = jbd2_journal_get_undo_access(handle, bh);
695 break;
696
697 default:
698 status = -EINVAL;
699 mlog(ML_ERROR, "Unknown access type!\n");
700 }
701 if (!status && ocfs2_meta_ecc(osb) && triggers)
702 jbd2_journal_set_triggers(bh, &triggers->ot_triggers);
703 ocfs2_metadata_cache_io_unlock(ci);
704
705 if (status < 0)
706 mlog(ML_ERROR, "Error %d getting %d access to buffer!\n",
707 status, type);
708
709 return status;
710 }
711
ocfs2_journal_access_di(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)712 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci,
713 struct buffer_head *bh, int type)
714 {
715 return __ocfs2_journal_access(handle, ci, bh, &di_triggers, type);
716 }
717
ocfs2_journal_access_eb(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)718 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci,
719 struct buffer_head *bh, int type)
720 {
721 return __ocfs2_journal_access(handle, ci, bh, &eb_triggers, type);
722 }
723
ocfs2_journal_access_rb(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)724 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci,
725 struct buffer_head *bh, int type)
726 {
727 return __ocfs2_journal_access(handle, ci, bh, &rb_triggers,
728 type);
729 }
730
ocfs2_journal_access_gd(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)731 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci,
732 struct buffer_head *bh, int type)
733 {
734 return __ocfs2_journal_access(handle, ci, bh, &gd_triggers, type);
735 }
736
ocfs2_journal_access_db(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)737 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci,
738 struct buffer_head *bh, int type)
739 {
740 return __ocfs2_journal_access(handle, ci, bh, &db_triggers, type);
741 }
742
ocfs2_journal_access_xb(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)743 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci,
744 struct buffer_head *bh, int type)
745 {
746 return __ocfs2_journal_access(handle, ci, bh, &xb_triggers, type);
747 }
748
ocfs2_journal_access_dq(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)749 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci,
750 struct buffer_head *bh, int type)
751 {
752 return __ocfs2_journal_access(handle, ci, bh, &dq_triggers, type);
753 }
754
ocfs2_journal_access_dr(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)755 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci,
756 struct buffer_head *bh, int type)
757 {
758 return __ocfs2_journal_access(handle, ci, bh, &dr_triggers, type);
759 }
760
ocfs2_journal_access_dl(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)761 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci,
762 struct buffer_head *bh, int type)
763 {
764 return __ocfs2_journal_access(handle, ci, bh, &dl_triggers, type);
765 }
766
ocfs2_journal_access(handle_t * handle,struct ocfs2_caching_info * ci,struct buffer_head * bh,int type)767 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci,
768 struct buffer_head *bh, int type)
769 {
770 return __ocfs2_journal_access(handle, ci, bh, NULL, type);
771 }
772
ocfs2_journal_dirty(handle_t * handle,struct buffer_head * bh)773 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh)
774 {
775 int status;
776
777 trace_ocfs2_journal_dirty((unsigned long long)bh->b_blocknr);
778
779 status = jbd2_journal_dirty_metadata(handle, bh);
780 if (status) {
781 mlog_errno(status);
782 if (!is_handle_aborted(handle)) {
783 journal_t *journal = handle->h_transaction->t_journal;
784 struct super_block *sb = bh->b_bdev->bd_super;
785
786 mlog(ML_ERROR, "jbd2_journal_dirty_metadata failed. "
787 "Aborting transaction and journal.\n");
788 handle->h_err = status;
789 jbd2_journal_abort_handle(handle);
790 jbd2_journal_abort(journal, status);
791 ocfs2_abort(sb, "Journal already aborted.\n");
792 }
793 }
794 }
795
796 #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE)
797
ocfs2_set_journal_params(struct ocfs2_super * osb)798 void ocfs2_set_journal_params(struct ocfs2_super *osb)
799 {
800 journal_t *journal = osb->journal->j_journal;
801 unsigned long commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
802
803 if (osb->osb_commit_interval)
804 commit_interval = osb->osb_commit_interval;
805
806 write_lock(&journal->j_state_lock);
807 journal->j_commit_interval = commit_interval;
808 if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
809 journal->j_flags |= JBD2_BARRIER;
810 else
811 journal->j_flags &= ~JBD2_BARRIER;
812 write_unlock(&journal->j_state_lock);
813 }
814
ocfs2_journal_init(struct ocfs2_journal * journal,int * dirty)815 int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty)
816 {
817 int status = -1;
818 struct inode *inode = NULL; /* the journal inode */
819 journal_t *j_journal = NULL;
820 struct ocfs2_dinode *di = NULL;
821 struct buffer_head *bh = NULL;
822 struct ocfs2_super *osb;
823 int inode_lock = 0;
824
825 BUG_ON(!journal);
826
827 osb = journal->j_osb;
828
829 /* already have the inode for our journal */
830 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
831 osb->slot_num);
832 if (inode == NULL) {
833 status = -EACCES;
834 mlog_errno(status);
835 goto done;
836 }
837 if (is_bad_inode(inode)) {
838 mlog(ML_ERROR, "access error (bad inode)\n");
839 iput(inode);
840 inode = NULL;
841 status = -EACCES;
842 goto done;
843 }
844
845 SET_INODE_JOURNAL(inode);
846 OCFS2_I(inode)->ip_open_count++;
847
848 /* Skip recovery waits here - journal inode metadata never
849 * changes in a live cluster so it can be considered an
850 * exception to the rule. */
851 status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
852 if (status < 0) {
853 if (status != -ERESTARTSYS)
854 mlog(ML_ERROR, "Could not get lock on journal!\n");
855 goto done;
856 }
857
858 inode_lock = 1;
859 di = (struct ocfs2_dinode *)bh->b_data;
860
861 if (i_size_read(inode) < OCFS2_MIN_JOURNAL_SIZE) {
862 mlog(ML_ERROR, "Journal file size (%lld) is too small!\n",
863 i_size_read(inode));
864 status = -EINVAL;
865 goto done;
866 }
867
868 trace_ocfs2_journal_init(i_size_read(inode),
869 (unsigned long long)inode->i_blocks,
870 OCFS2_I(inode)->ip_clusters);
871
872 /* call the kernels journal init function now */
873 j_journal = jbd2_journal_init_inode(inode);
874 if (j_journal == NULL) {
875 mlog(ML_ERROR, "Linux journal layer error\n");
876 status = -EINVAL;
877 goto done;
878 }
879
880 trace_ocfs2_journal_init_maxlen(j_journal->j_maxlen);
881
882 *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) &
883 OCFS2_JOURNAL_DIRTY_FL);
884
885 journal->j_journal = j_journal;
886 journal->j_inode = inode;
887 journal->j_bh = bh;
888
889 ocfs2_set_journal_params(osb);
890
891 journal->j_state = OCFS2_JOURNAL_LOADED;
892
893 status = 0;
894 done:
895 if (status < 0) {
896 if (inode_lock)
897 ocfs2_inode_unlock(inode, 1);
898 brelse(bh);
899 if (inode) {
900 OCFS2_I(inode)->ip_open_count--;
901 iput(inode);
902 }
903 }
904
905 return status;
906 }
907
ocfs2_bump_recovery_generation(struct ocfs2_dinode * di)908 static void ocfs2_bump_recovery_generation(struct ocfs2_dinode *di)
909 {
910 le32_add_cpu(&(di->id1.journal1.ij_recovery_generation), 1);
911 }
912
ocfs2_get_recovery_generation(struct ocfs2_dinode * di)913 static u32 ocfs2_get_recovery_generation(struct ocfs2_dinode *di)
914 {
915 return le32_to_cpu(di->id1.journal1.ij_recovery_generation);
916 }
917
ocfs2_journal_toggle_dirty(struct ocfs2_super * osb,int dirty,int replayed)918 static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb,
919 int dirty, int replayed)
920 {
921 int status;
922 unsigned int flags;
923 struct ocfs2_journal *journal = osb->journal;
924 struct buffer_head *bh = journal->j_bh;
925 struct ocfs2_dinode *fe;
926
927 fe = (struct ocfs2_dinode *)bh->b_data;
928
929 /* The journal bh on the osb always comes from ocfs2_journal_init()
930 * and was validated there inside ocfs2_inode_lock_full(). It's a
931 * code bug if we mess it up. */
932 BUG_ON(!OCFS2_IS_VALID_DINODE(fe));
933
934 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
935 if (dirty)
936 flags |= OCFS2_JOURNAL_DIRTY_FL;
937 else
938 flags &= ~OCFS2_JOURNAL_DIRTY_FL;
939 fe->id1.journal1.ij_flags = cpu_to_le32(flags);
940
941 if (replayed)
942 ocfs2_bump_recovery_generation(fe);
943
944 ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &fe->i_check);
945 status = ocfs2_write_block(osb, bh, INODE_CACHE(journal->j_inode));
946 if (status < 0)
947 mlog_errno(status);
948
949 return status;
950 }
951
952 /*
953 * If the journal has been kmalloc'd it needs to be freed after this
954 * call.
955 */
ocfs2_journal_shutdown(struct ocfs2_super * osb)956 void ocfs2_journal_shutdown(struct ocfs2_super *osb)
957 {
958 struct ocfs2_journal *journal = NULL;
959 int status = 0;
960 struct inode *inode = NULL;
961 int num_running_trans = 0;
962
963 BUG_ON(!osb);
964
965 journal = osb->journal;
966 if (!journal)
967 goto done;
968
969 inode = journal->j_inode;
970
971 if (journal->j_state != OCFS2_JOURNAL_LOADED)
972 goto done;
973
974 /* need to inc inode use count - jbd2_journal_destroy will iput. */
975 if (!igrab(inode))
976 BUG();
977
978 num_running_trans = atomic_read(&(osb->journal->j_num_trans));
979 trace_ocfs2_journal_shutdown(num_running_trans);
980
981 /* Do a commit_cache here. It will flush our journal, *and*
982 * release any locks that are still held.
983 * set the SHUTDOWN flag and release the trans lock.
984 * the commit thread will take the trans lock for us below. */
985 journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN;
986
987 /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not
988 * drop the trans_lock (which we want to hold until we
989 * completely destroy the journal. */
990 if (osb->commit_task) {
991 /* Wait for the commit thread */
992 trace_ocfs2_journal_shutdown_wait(osb->commit_task);
993 kthread_stop(osb->commit_task);
994 osb->commit_task = NULL;
995 }
996
997 BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0);
998
999 if (ocfs2_mount_local(osb)) {
1000 jbd2_journal_lock_updates(journal->j_journal);
1001 status = jbd2_journal_flush(journal->j_journal);
1002 jbd2_journal_unlock_updates(journal->j_journal);
1003 if (status < 0)
1004 mlog_errno(status);
1005 }
1006
1007 /* Shutdown the kernel journal system */
1008 if (!jbd2_journal_destroy(journal->j_journal) && !status) {
1009 /*
1010 * Do not toggle if flush was unsuccessful otherwise
1011 * will leave dirty metadata in a "clean" journal
1012 */
1013 status = ocfs2_journal_toggle_dirty(osb, 0, 0);
1014 if (status < 0)
1015 mlog_errno(status);
1016 }
1017 journal->j_journal = NULL;
1018
1019 OCFS2_I(inode)->ip_open_count--;
1020
1021 /* unlock our journal */
1022 ocfs2_inode_unlock(inode, 1);
1023
1024 brelse(journal->j_bh);
1025 journal->j_bh = NULL;
1026
1027 journal->j_state = OCFS2_JOURNAL_FREE;
1028
1029 // up_write(&journal->j_trans_barrier);
1030 done:
1031 iput(inode);
1032 }
1033
ocfs2_clear_journal_error(struct super_block * sb,journal_t * journal,int slot)1034 static void ocfs2_clear_journal_error(struct super_block *sb,
1035 journal_t *journal,
1036 int slot)
1037 {
1038 int olderr;
1039
1040 olderr = jbd2_journal_errno(journal);
1041 if (olderr) {
1042 mlog(ML_ERROR, "File system error %d recorded in "
1043 "journal %u.\n", olderr, slot);
1044 mlog(ML_ERROR, "File system on device %s needs checking.\n",
1045 sb->s_id);
1046
1047 jbd2_journal_ack_err(journal);
1048 jbd2_journal_clear_err(journal);
1049 }
1050 }
1051
ocfs2_journal_load(struct ocfs2_journal * journal,int local,int replayed)1052 int ocfs2_journal_load(struct ocfs2_journal *journal, int local, int replayed)
1053 {
1054 int status = 0;
1055 struct ocfs2_super *osb;
1056
1057 BUG_ON(!journal);
1058
1059 osb = journal->j_osb;
1060
1061 status = jbd2_journal_load(journal->j_journal);
1062 if (status < 0) {
1063 mlog(ML_ERROR, "Failed to load journal!\n");
1064 goto done;
1065 }
1066
1067 ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num);
1068
1069 if (replayed) {
1070 jbd2_journal_lock_updates(journal->j_journal);
1071 status = jbd2_journal_flush(journal->j_journal);
1072 jbd2_journal_unlock_updates(journal->j_journal);
1073 if (status < 0)
1074 mlog_errno(status);
1075 }
1076
1077 status = ocfs2_journal_toggle_dirty(osb, 1, replayed);
1078 if (status < 0) {
1079 mlog_errno(status);
1080 goto done;
1081 }
1082
1083 /* Launch the commit thread */
1084 if (!local) {
1085 osb->commit_task = kthread_run(ocfs2_commit_thread, osb,
1086 "ocfs2cmt-%s", osb->uuid_str);
1087 if (IS_ERR(osb->commit_task)) {
1088 status = PTR_ERR(osb->commit_task);
1089 osb->commit_task = NULL;
1090 mlog(ML_ERROR, "unable to launch ocfs2commit thread, "
1091 "error=%d", status);
1092 goto done;
1093 }
1094 } else
1095 osb->commit_task = NULL;
1096
1097 done:
1098 return status;
1099 }
1100
1101
1102 /* 'full' flag tells us whether we clear out all blocks or if we just
1103 * mark the journal clean */
ocfs2_journal_wipe(struct ocfs2_journal * journal,int full)1104 int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full)
1105 {
1106 int status;
1107
1108 BUG_ON(!journal);
1109
1110 status = jbd2_journal_wipe(journal->j_journal, full);
1111 if (status < 0) {
1112 mlog_errno(status);
1113 goto bail;
1114 }
1115
1116 status = ocfs2_journal_toggle_dirty(journal->j_osb, 0, 0);
1117 if (status < 0)
1118 mlog_errno(status);
1119
1120 bail:
1121 return status;
1122 }
1123
ocfs2_recovery_completed(struct ocfs2_super * osb)1124 static int ocfs2_recovery_completed(struct ocfs2_super *osb)
1125 {
1126 int empty;
1127 struct ocfs2_recovery_map *rm = osb->recovery_map;
1128
1129 spin_lock(&osb->osb_lock);
1130 empty = (rm->rm_used == 0);
1131 spin_unlock(&osb->osb_lock);
1132
1133 return empty;
1134 }
1135
ocfs2_wait_for_recovery(struct ocfs2_super * osb)1136 void ocfs2_wait_for_recovery(struct ocfs2_super *osb)
1137 {
1138 wait_event(osb->recovery_event, ocfs2_recovery_completed(osb));
1139 }
1140
1141 /*
1142 * JBD Might read a cached version of another nodes journal file. We
1143 * don't want this as this file changes often and we get no
1144 * notification on those changes. The only way to be sure that we've
1145 * got the most up to date version of those blocks then is to force
1146 * read them off disk. Just searching through the buffer cache won't
1147 * work as there may be pages backing this file which are still marked
1148 * up to date. We know things can't change on this file underneath us
1149 * as we have the lock by now :)
1150 */
ocfs2_force_read_journal(struct inode * inode)1151 static int ocfs2_force_read_journal(struct inode *inode)
1152 {
1153 int status = 0;
1154 int i;
1155 u64 v_blkno, p_blkno, p_blocks, num_blocks;
1156 struct buffer_head *bh = NULL;
1157 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1158
1159 num_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode));
1160 v_blkno = 0;
1161 while (v_blkno < num_blocks) {
1162 status = ocfs2_extent_map_get_blocks(inode, v_blkno,
1163 &p_blkno, &p_blocks, NULL);
1164 if (status < 0) {
1165 mlog_errno(status);
1166 goto bail;
1167 }
1168
1169 for (i = 0; i < p_blocks; i++, p_blkno++) {
1170 bh = __find_get_block(osb->sb->s_bdev, p_blkno,
1171 osb->sb->s_blocksize);
1172 /* block not cached. */
1173 if (!bh)
1174 continue;
1175
1176 brelse(bh);
1177 bh = NULL;
1178 /* We are reading journal data which should not
1179 * be put in the uptodate cache.
1180 */
1181 status = ocfs2_read_blocks_sync(osb, p_blkno, 1, &bh);
1182 if (status < 0) {
1183 mlog_errno(status);
1184 goto bail;
1185 }
1186
1187 brelse(bh);
1188 bh = NULL;
1189 }
1190
1191 v_blkno += p_blocks;
1192 }
1193
1194 bail:
1195 return status;
1196 }
1197
1198 struct ocfs2_la_recovery_item {
1199 struct list_head lri_list;
1200 int lri_slot;
1201 struct ocfs2_dinode *lri_la_dinode;
1202 struct ocfs2_dinode *lri_tl_dinode;
1203 struct ocfs2_quota_recovery *lri_qrec;
1204 enum ocfs2_orphan_reco_type lri_orphan_reco_type;
1205 };
1206
1207 /* Does the second half of the recovery process. By this point, the
1208 * node is marked clean and can actually be considered recovered,
1209 * hence it's no longer in the recovery map, but there's still some
1210 * cleanup we can do which shouldn't happen within the recovery thread
1211 * as locking in that context becomes very difficult if we are to take
1212 * recovering nodes into account.
1213 *
1214 * NOTE: This function can and will sleep on recovery of other nodes
1215 * during cluster locking, just like any other ocfs2 process.
1216 */
ocfs2_complete_recovery(struct work_struct * work)1217 void ocfs2_complete_recovery(struct work_struct *work)
1218 {
1219 int ret = 0;
1220 struct ocfs2_journal *journal =
1221 container_of(work, struct ocfs2_journal, j_recovery_work);
1222 struct ocfs2_super *osb = journal->j_osb;
1223 struct ocfs2_dinode *la_dinode, *tl_dinode;
1224 struct ocfs2_la_recovery_item *item, *n;
1225 struct ocfs2_quota_recovery *qrec;
1226 enum ocfs2_orphan_reco_type orphan_reco_type;
1227 LIST_HEAD(tmp_la_list);
1228
1229 trace_ocfs2_complete_recovery(
1230 (unsigned long long)OCFS2_I(journal->j_inode)->ip_blkno);
1231
1232 spin_lock(&journal->j_lock);
1233 list_splice_init(&journal->j_la_cleanups, &tmp_la_list);
1234 spin_unlock(&journal->j_lock);
1235
1236 list_for_each_entry_safe(item, n, &tmp_la_list, lri_list) {
1237 list_del_init(&item->lri_list);
1238
1239 ocfs2_wait_on_quotas(osb);
1240
1241 la_dinode = item->lri_la_dinode;
1242 tl_dinode = item->lri_tl_dinode;
1243 qrec = item->lri_qrec;
1244 orphan_reco_type = item->lri_orphan_reco_type;
1245
1246 trace_ocfs2_complete_recovery_slot(item->lri_slot,
1247 la_dinode ? le64_to_cpu(la_dinode->i_blkno) : 0,
1248 tl_dinode ? le64_to_cpu(tl_dinode->i_blkno) : 0,
1249 qrec);
1250
1251 if (la_dinode) {
1252 ret = ocfs2_complete_local_alloc_recovery(osb,
1253 la_dinode);
1254 if (ret < 0)
1255 mlog_errno(ret);
1256
1257 kfree(la_dinode);
1258 }
1259
1260 if (tl_dinode) {
1261 ret = ocfs2_complete_truncate_log_recovery(osb,
1262 tl_dinode);
1263 if (ret < 0)
1264 mlog_errno(ret);
1265
1266 kfree(tl_dinode);
1267 }
1268
1269 ret = ocfs2_recover_orphans(osb, item->lri_slot,
1270 orphan_reco_type);
1271 if (ret < 0)
1272 mlog_errno(ret);
1273
1274 if (qrec) {
1275 ret = ocfs2_finish_quota_recovery(osb, qrec,
1276 item->lri_slot);
1277 if (ret < 0)
1278 mlog_errno(ret);
1279 /* Recovery info is already freed now */
1280 }
1281
1282 kfree(item);
1283 }
1284
1285 trace_ocfs2_complete_recovery_end(ret);
1286 }
1287
1288 /* NOTE: This function always eats your references to la_dinode and
1289 * tl_dinode, either manually on error, or by passing them to
1290 * ocfs2_complete_recovery */
ocfs2_queue_recovery_completion(struct ocfs2_journal * journal,int slot_num,struct ocfs2_dinode * la_dinode,struct ocfs2_dinode * tl_dinode,struct ocfs2_quota_recovery * qrec,enum ocfs2_orphan_reco_type orphan_reco_type)1291 static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal,
1292 int slot_num,
1293 struct ocfs2_dinode *la_dinode,
1294 struct ocfs2_dinode *tl_dinode,
1295 struct ocfs2_quota_recovery *qrec,
1296 enum ocfs2_orphan_reco_type orphan_reco_type)
1297 {
1298 struct ocfs2_la_recovery_item *item;
1299
1300 item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS);
1301 if (!item) {
1302 /* Though we wish to avoid it, we are in fact safe in
1303 * skipping local alloc cleanup as fsck.ocfs2 is more
1304 * than capable of reclaiming unused space. */
1305 kfree(la_dinode);
1306 kfree(tl_dinode);
1307
1308 if (qrec)
1309 ocfs2_free_quota_recovery(qrec);
1310
1311 mlog_errno(-ENOMEM);
1312 return;
1313 }
1314
1315 INIT_LIST_HEAD(&item->lri_list);
1316 item->lri_la_dinode = la_dinode;
1317 item->lri_slot = slot_num;
1318 item->lri_tl_dinode = tl_dinode;
1319 item->lri_qrec = qrec;
1320 item->lri_orphan_reco_type = orphan_reco_type;
1321
1322 spin_lock(&journal->j_lock);
1323 list_add_tail(&item->lri_list, &journal->j_la_cleanups);
1324 queue_work(journal->j_osb->ocfs2_wq, &journal->j_recovery_work);
1325 spin_unlock(&journal->j_lock);
1326 }
1327
1328 /* Called by the mount code to queue recovery the last part of
1329 * recovery for it's own and offline slot(s). */
ocfs2_complete_mount_recovery(struct ocfs2_super * osb)1330 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb)
1331 {
1332 struct ocfs2_journal *journal = osb->journal;
1333
1334 if (ocfs2_is_hard_readonly(osb))
1335 return;
1336
1337 /* No need to queue up our truncate_log as regular cleanup will catch
1338 * that */
1339 ocfs2_queue_recovery_completion(journal, osb->slot_num,
1340 osb->local_alloc_copy, NULL, NULL,
1341 ORPHAN_NEED_TRUNCATE);
1342 ocfs2_schedule_truncate_log_flush(osb, 0);
1343
1344 osb->local_alloc_copy = NULL;
1345
1346 /* queue to recover orphan slots for all offline slots */
1347 ocfs2_replay_map_set_state(osb, REPLAY_NEEDED);
1348 ocfs2_queue_replay_slots(osb, ORPHAN_NEED_TRUNCATE);
1349 ocfs2_free_replay_slots(osb);
1350 }
1351
ocfs2_complete_quota_recovery(struct ocfs2_super * osb)1352 void ocfs2_complete_quota_recovery(struct ocfs2_super *osb)
1353 {
1354 if (osb->quota_rec) {
1355 ocfs2_queue_recovery_completion(osb->journal,
1356 osb->slot_num,
1357 NULL,
1358 NULL,
1359 osb->quota_rec,
1360 ORPHAN_NEED_TRUNCATE);
1361 osb->quota_rec = NULL;
1362 }
1363 }
1364
__ocfs2_recovery_thread(void * arg)1365 static int __ocfs2_recovery_thread(void *arg)
1366 {
1367 int status, node_num, slot_num;
1368 struct ocfs2_super *osb = arg;
1369 struct ocfs2_recovery_map *rm = osb->recovery_map;
1370 int *rm_quota = NULL;
1371 int rm_quota_used = 0, i;
1372 struct ocfs2_quota_recovery *qrec;
1373
1374 /* Whether the quota supported. */
1375 int quota_enabled = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb,
1376 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
1377 || OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb,
1378 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA);
1379
1380 status = ocfs2_wait_on_mount(osb);
1381 if (status < 0) {
1382 goto bail;
1383 }
1384
1385 if (quota_enabled) {
1386 rm_quota = kcalloc(osb->max_slots, sizeof(int), GFP_NOFS);
1387 if (!rm_quota) {
1388 status = -ENOMEM;
1389 goto bail;
1390 }
1391 }
1392 restart:
1393 status = ocfs2_super_lock(osb, 1);
1394 if (status < 0) {
1395 mlog_errno(status);
1396 goto bail;
1397 }
1398
1399 status = ocfs2_compute_replay_slots(osb);
1400 if (status < 0)
1401 mlog_errno(status);
1402
1403 /* queue recovery for our own slot */
1404 ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL,
1405 NULL, NULL, ORPHAN_NO_NEED_TRUNCATE);
1406
1407 spin_lock(&osb->osb_lock);
1408 while (rm->rm_used) {
1409 /* It's always safe to remove entry zero, as we won't
1410 * clear it until ocfs2_recover_node() has succeeded. */
1411 node_num = rm->rm_entries[0];
1412 spin_unlock(&osb->osb_lock);
1413 slot_num = ocfs2_node_num_to_slot(osb, node_num);
1414 trace_ocfs2_recovery_thread_node(node_num, slot_num);
1415 if (slot_num == -ENOENT) {
1416 status = 0;
1417 goto skip_recovery;
1418 }
1419
1420 /* It is a bit subtle with quota recovery. We cannot do it
1421 * immediately because we have to obtain cluster locks from
1422 * quota files and we also don't want to just skip it because
1423 * then quota usage would be out of sync until some node takes
1424 * the slot. So we remember which nodes need quota recovery
1425 * and when everything else is done, we recover quotas. */
1426 if (quota_enabled) {
1427 for (i = 0; i < rm_quota_used
1428 && rm_quota[i] != slot_num; i++)
1429 ;
1430
1431 if (i == rm_quota_used)
1432 rm_quota[rm_quota_used++] = slot_num;
1433 }
1434
1435 status = ocfs2_recover_node(osb, node_num, slot_num);
1436 skip_recovery:
1437 if (!status) {
1438 ocfs2_recovery_map_clear(osb, node_num);
1439 } else {
1440 mlog(ML_ERROR,
1441 "Error %d recovering node %d on device (%u,%u)!\n",
1442 status, node_num,
1443 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1444 mlog(ML_ERROR, "Volume requires unmount.\n");
1445 }
1446
1447 spin_lock(&osb->osb_lock);
1448 }
1449 spin_unlock(&osb->osb_lock);
1450 trace_ocfs2_recovery_thread_end(status);
1451
1452 /* Refresh all journal recovery generations from disk */
1453 status = ocfs2_check_journals_nolocks(osb);
1454 status = (status == -EROFS) ? 0 : status;
1455 if (status < 0)
1456 mlog_errno(status);
1457
1458 /* Now it is right time to recover quotas... We have to do this under
1459 * superblock lock so that no one can start using the slot (and crash)
1460 * before we recover it */
1461 if (quota_enabled) {
1462 for (i = 0; i < rm_quota_used; i++) {
1463 qrec = ocfs2_begin_quota_recovery(osb, rm_quota[i]);
1464 if (IS_ERR(qrec)) {
1465 status = PTR_ERR(qrec);
1466 mlog_errno(status);
1467 continue;
1468 }
1469 ocfs2_queue_recovery_completion(osb->journal,
1470 rm_quota[i],
1471 NULL, NULL, qrec,
1472 ORPHAN_NEED_TRUNCATE);
1473 }
1474 }
1475
1476 ocfs2_super_unlock(osb, 1);
1477
1478 /* queue recovery for offline slots */
1479 ocfs2_queue_replay_slots(osb, ORPHAN_NEED_TRUNCATE);
1480
1481 bail:
1482 mutex_lock(&osb->recovery_lock);
1483 if (!status && !ocfs2_recovery_completed(osb)) {
1484 mutex_unlock(&osb->recovery_lock);
1485 goto restart;
1486 }
1487
1488 ocfs2_free_replay_slots(osb);
1489 osb->recovery_thread_task = NULL;
1490 mb(); /* sync with ocfs2_recovery_thread_running */
1491 wake_up(&osb->recovery_event);
1492
1493 mutex_unlock(&osb->recovery_lock);
1494
1495 if (quota_enabled)
1496 kfree(rm_quota);
1497
1498 /* no one is callint kthread_stop() for us so the kthread() api
1499 * requires that we call do_exit(). And it isn't exported, but
1500 * complete_and_exit() seems to be a minimal wrapper around it. */
1501 complete_and_exit(NULL, status);
1502 }
1503
ocfs2_recovery_thread(struct ocfs2_super * osb,int node_num)1504 void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num)
1505 {
1506 mutex_lock(&osb->recovery_lock);
1507
1508 trace_ocfs2_recovery_thread(node_num, osb->node_num,
1509 osb->disable_recovery, osb->recovery_thread_task,
1510 osb->disable_recovery ?
1511 -1 : ocfs2_recovery_map_set(osb, node_num));
1512
1513 if (osb->disable_recovery)
1514 goto out;
1515
1516 if (osb->recovery_thread_task)
1517 goto out;
1518
1519 osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb,
1520 "ocfs2rec-%s", osb->uuid_str);
1521 if (IS_ERR(osb->recovery_thread_task)) {
1522 mlog_errno((int)PTR_ERR(osb->recovery_thread_task));
1523 osb->recovery_thread_task = NULL;
1524 }
1525
1526 out:
1527 mutex_unlock(&osb->recovery_lock);
1528 wake_up(&osb->recovery_event);
1529 }
1530
ocfs2_read_journal_inode(struct ocfs2_super * osb,int slot_num,struct buffer_head ** bh,struct inode ** ret_inode)1531 static int ocfs2_read_journal_inode(struct ocfs2_super *osb,
1532 int slot_num,
1533 struct buffer_head **bh,
1534 struct inode **ret_inode)
1535 {
1536 int status = -EACCES;
1537 struct inode *inode = NULL;
1538
1539 BUG_ON(slot_num >= osb->max_slots);
1540
1541 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
1542 slot_num);
1543 if (!inode || is_bad_inode(inode)) {
1544 mlog_errno(status);
1545 goto bail;
1546 }
1547 SET_INODE_JOURNAL(inode);
1548
1549 status = ocfs2_read_inode_block_full(inode, bh, OCFS2_BH_IGNORE_CACHE);
1550 if (status < 0) {
1551 mlog_errno(status);
1552 goto bail;
1553 }
1554
1555 status = 0;
1556
1557 bail:
1558 if (inode) {
1559 if (status || !ret_inode)
1560 iput(inode);
1561 else
1562 *ret_inode = inode;
1563 }
1564 return status;
1565 }
1566
1567 /* Does the actual journal replay and marks the journal inode as
1568 * clean. Will only replay if the journal inode is marked dirty. */
ocfs2_replay_journal(struct ocfs2_super * osb,int node_num,int slot_num)1569 static int ocfs2_replay_journal(struct ocfs2_super *osb,
1570 int node_num,
1571 int slot_num)
1572 {
1573 int status;
1574 int got_lock = 0;
1575 unsigned int flags;
1576 struct inode *inode = NULL;
1577 struct ocfs2_dinode *fe;
1578 journal_t *journal = NULL;
1579 struct buffer_head *bh = NULL;
1580 u32 slot_reco_gen;
1581
1582 status = ocfs2_read_journal_inode(osb, slot_num, &bh, &inode);
1583 if (status) {
1584 mlog_errno(status);
1585 goto done;
1586 }
1587
1588 fe = (struct ocfs2_dinode *)bh->b_data;
1589 slot_reco_gen = ocfs2_get_recovery_generation(fe);
1590 brelse(bh);
1591 bh = NULL;
1592
1593 /*
1594 * As the fs recovery is asynchronous, there is a small chance that
1595 * another node mounted (and recovered) the slot before the recovery
1596 * thread could get the lock. To handle that, we dirty read the journal
1597 * inode for that slot to get the recovery generation. If it is
1598 * different than what we expected, the slot has been recovered.
1599 * If not, it needs recovery.
1600 */
1601 if (osb->slot_recovery_generations[slot_num] != slot_reco_gen) {
1602 trace_ocfs2_replay_journal_recovered(slot_num,
1603 osb->slot_recovery_generations[slot_num], slot_reco_gen);
1604 osb->slot_recovery_generations[slot_num] = slot_reco_gen;
1605 status = -EBUSY;
1606 goto done;
1607 }
1608
1609 /* Continue with recovery as the journal has not yet been recovered */
1610
1611 status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
1612 if (status < 0) {
1613 trace_ocfs2_replay_journal_lock_err(status);
1614 if (status != -ERESTARTSYS)
1615 mlog(ML_ERROR, "Could not lock journal!\n");
1616 goto done;
1617 }
1618 got_lock = 1;
1619
1620 fe = (struct ocfs2_dinode *) bh->b_data;
1621
1622 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
1623 slot_reco_gen = ocfs2_get_recovery_generation(fe);
1624
1625 if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) {
1626 trace_ocfs2_replay_journal_skip(node_num);
1627 /* Refresh recovery generation for the slot */
1628 osb->slot_recovery_generations[slot_num] = slot_reco_gen;
1629 goto done;
1630 }
1631
1632 /* we need to run complete recovery for offline orphan slots */
1633 ocfs2_replay_map_set_state(osb, REPLAY_NEEDED);
1634
1635 printk(KERN_NOTICE "ocfs2: Begin replay journal (node %d, slot %d) on "\
1636 "device (%u,%u)\n", node_num, slot_num, MAJOR(osb->sb->s_dev),
1637 MINOR(osb->sb->s_dev));
1638
1639 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1640
1641 status = ocfs2_force_read_journal(inode);
1642 if (status < 0) {
1643 mlog_errno(status);
1644 goto done;
1645 }
1646
1647 journal = jbd2_journal_init_inode(inode);
1648 if (journal == NULL) {
1649 mlog(ML_ERROR, "Linux journal layer error\n");
1650 status = -EIO;
1651 goto done;
1652 }
1653
1654 status = jbd2_journal_load(journal);
1655 if (status < 0) {
1656 mlog_errno(status);
1657 if (!igrab(inode))
1658 BUG();
1659 jbd2_journal_destroy(journal);
1660 goto done;
1661 }
1662
1663 ocfs2_clear_journal_error(osb->sb, journal, slot_num);
1664
1665 /* wipe the journal */
1666 jbd2_journal_lock_updates(journal);
1667 status = jbd2_journal_flush(journal);
1668 jbd2_journal_unlock_updates(journal);
1669 if (status < 0)
1670 mlog_errno(status);
1671
1672 /* This will mark the node clean */
1673 flags = le32_to_cpu(fe->id1.journal1.ij_flags);
1674 flags &= ~OCFS2_JOURNAL_DIRTY_FL;
1675 fe->id1.journal1.ij_flags = cpu_to_le32(flags);
1676
1677 /* Increment recovery generation to indicate successful recovery */
1678 ocfs2_bump_recovery_generation(fe);
1679 osb->slot_recovery_generations[slot_num] =
1680 ocfs2_get_recovery_generation(fe);
1681
1682 ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &fe->i_check);
1683 status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
1684 if (status < 0)
1685 mlog_errno(status);
1686
1687 if (!igrab(inode))
1688 BUG();
1689
1690 jbd2_journal_destroy(journal);
1691
1692 printk(KERN_NOTICE "ocfs2: End replay journal (node %d, slot %d) on "\
1693 "device (%u,%u)\n", node_num, slot_num, MAJOR(osb->sb->s_dev),
1694 MINOR(osb->sb->s_dev));
1695 done:
1696 /* drop the lock on this nodes journal */
1697 if (got_lock)
1698 ocfs2_inode_unlock(inode, 1);
1699
1700 iput(inode);
1701 brelse(bh);
1702
1703 return status;
1704 }
1705
1706 /*
1707 * Do the most important parts of node recovery:
1708 * - Replay it's journal
1709 * - Stamp a clean local allocator file
1710 * - Stamp a clean truncate log
1711 * - Mark the node clean
1712 *
1713 * If this function completes without error, a node in OCFS2 can be
1714 * said to have been safely recovered. As a result, failure during the
1715 * second part of a nodes recovery process (local alloc recovery) is
1716 * far less concerning.
1717 */
ocfs2_recover_node(struct ocfs2_super * osb,int node_num,int slot_num)1718 static int ocfs2_recover_node(struct ocfs2_super *osb,
1719 int node_num, int slot_num)
1720 {
1721 int status = 0;
1722 struct ocfs2_dinode *la_copy = NULL;
1723 struct ocfs2_dinode *tl_copy = NULL;
1724
1725 trace_ocfs2_recover_node(node_num, slot_num, osb->node_num);
1726
1727 /* Should not ever be called to recover ourselves -- in that
1728 * case we should've called ocfs2_journal_load instead. */
1729 BUG_ON(osb->node_num == node_num);
1730
1731 status = ocfs2_replay_journal(osb, node_num, slot_num);
1732 if (status < 0) {
1733 if (status == -EBUSY) {
1734 trace_ocfs2_recover_node_skip(slot_num, node_num);
1735 status = 0;
1736 goto done;
1737 }
1738 mlog_errno(status);
1739 goto done;
1740 }
1741
1742 /* Stamp a clean local alloc file AFTER recovering the journal... */
1743 status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy);
1744 if (status < 0) {
1745 mlog_errno(status);
1746 goto done;
1747 }
1748
1749 /* An error from begin_truncate_log_recovery is not
1750 * serious enough to warrant halting the rest of
1751 * recovery. */
1752 status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy);
1753 if (status < 0)
1754 mlog_errno(status);
1755
1756 /* Likewise, this would be a strange but ultimately not so
1757 * harmful place to get an error... */
1758 status = ocfs2_clear_slot(osb, slot_num);
1759 if (status < 0)
1760 mlog_errno(status);
1761
1762 /* This will kfree the memory pointed to by la_copy and tl_copy */
1763 ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy,
1764 tl_copy, NULL, ORPHAN_NEED_TRUNCATE);
1765
1766 status = 0;
1767 done:
1768
1769 return status;
1770 }
1771
1772 /* Test node liveness by trylocking his journal. If we get the lock,
1773 * we drop it here. Return 0 if we got the lock, -EAGAIN if node is
1774 * still alive (we couldn't get the lock) and < 0 on error. */
ocfs2_trylock_journal(struct ocfs2_super * osb,int slot_num)1775 static int ocfs2_trylock_journal(struct ocfs2_super *osb,
1776 int slot_num)
1777 {
1778 int status, flags;
1779 struct inode *inode = NULL;
1780
1781 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE,
1782 slot_num);
1783 if (inode == NULL) {
1784 mlog(ML_ERROR, "access error\n");
1785 status = -EACCES;
1786 goto bail;
1787 }
1788 if (is_bad_inode(inode)) {
1789 mlog(ML_ERROR, "access error (bad inode)\n");
1790 iput(inode);
1791 inode = NULL;
1792 status = -EACCES;
1793 goto bail;
1794 }
1795 SET_INODE_JOURNAL(inode);
1796
1797 flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE;
1798 status = ocfs2_inode_lock_full(inode, NULL, 1, flags);
1799 if (status < 0) {
1800 if (status != -EAGAIN)
1801 mlog_errno(status);
1802 goto bail;
1803 }
1804
1805 ocfs2_inode_unlock(inode, 1);
1806 bail:
1807 iput(inode);
1808
1809 return status;
1810 }
1811
1812 /* Call this underneath ocfs2_super_lock. It also assumes that the
1813 * slot info struct has been updated from disk. */
ocfs2_mark_dead_nodes(struct ocfs2_super * osb)1814 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
1815 {
1816 unsigned int node_num;
1817 int status, i;
1818 u32 gen;
1819 struct buffer_head *bh = NULL;
1820 struct ocfs2_dinode *di;
1821
1822 /* This is called with the super block cluster lock, so we
1823 * know that the slot map can't change underneath us. */
1824
1825 for (i = 0; i < osb->max_slots; i++) {
1826 /* Read journal inode to get the recovery generation */
1827 status = ocfs2_read_journal_inode(osb, i, &bh, NULL);
1828 if (status) {
1829 mlog_errno(status);
1830 goto bail;
1831 }
1832 di = (struct ocfs2_dinode *)bh->b_data;
1833 gen = ocfs2_get_recovery_generation(di);
1834 brelse(bh);
1835 bh = NULL;
1836
1837 spin_lock(&osb->osb_lock);
1838 osb->slot_recovery_generations[i] = gen;
1839
1840 trace_ocfs2_mark_dead_nodes(i,
1841 osb->slot_recovery_generations[i]);
1842
1843 if (i == osb->slot_num) {
1844 spin_unlock(&osb->osb_lock);
1845 continue;
1846 }
1847
1848 status = ocfs2_slot_to_node_num_locked(osb, i, &node_num);
1849 if (status == -ENOENT) {
1850 spin_unlock(&osb->osb_lock);
1851 continue;
1852 }
1853
1854 if (__ocfs2_recovery_map_test(osb, node_num)) {
1855 spin_unlock(&osb->osb_lock);
1856 continue;
1857 }
1858 spin_unlock(&osb->osb_lock);
1859
1860 /* Ok, we have a slot occupied by another node which
1861 * is not in the recovery map. We trylock his journal
1862 * file here to test if he's alive. */
1863 status = ocfs2_trylock_journal(osb, i);
1864 if (!status) {
1865 /* Since we're called from mount, we know that
1866 * the recovery thread can't race us on
1867 * setting / checking the recovery bits. */
1868 ocfs2_recovery_thread(osb, node_num);
1869 } else if ((status < 0) && (status != -EAGAIN)) {
1870 mlog_errno(status);
1871 goto bail;
1872 }
1873 }
1874
1875 status = 0;
1876 bail:
1877 return status;
1878 }
1879
1880 /*
1881 * Scan timer should get fired every ORPHAN_SCAN_SCHEDULE_TIMEOUT. Add some
1882 * randomness to the timeout to minimize multple nodes firing the timer at the
1883 * same time.
1884 */
ocfs2_orphan_scan_timeout(void)1885 static inline unsigned long ocfs2_orphan_scan_timeout(void)
1886 {
1887 unsigned long time;
1888
1889 get_random_bytes(&time, sizeof(time));
1890 time = ORPHAN_SCAN_SCHEDULE_TIMEOUT + (time % 5000);
1891 return msecs_to_jiffies(time);
1892 }
1893
1894 /*
1895 * ocfs2_queue_orphan_scan calls ocfs2_queue_recovery_completion for
1896 * every slot, queuing a recovery of the slot on the ocfs2_wq thread. This
1897 * is done to catch any orphans that are left over in orphan directories.
1898 *
1899 * It scans all slots, even ones that are in use. It does so to handle the
1900 * case described below:
1901 *
1902 * Node 1 has an inode it was using. The dentry went away due to memory
1903 * pressure. Node 1 closes the inode, but it's on the free list. The node
1904 * has the open lock.
1905 * Node 2 unlinks the inode. It grabs the dentry lock to notify others,
1906 * but node 1 has no dentry and doesn't get the message. It trylocks the
1907 * open lock, sees that another node has a PR, and does nothing.
1908 * Later node 2 runs its orphan dir. It igets the inode, trylocks the
1909 * open lock, sees the PR still, and does nothing.
1910 * Basically, we have to trigger an orphan iput on node 1. The only way
1911 * for this to happen is if node 1 runs node 2's orphan dir.
1912 *
1913 * ocfs2_queue_orphan_scan gets called every ORPHAN_SCAN_SCHEDULE_TIMEOUT
1914 * seconds. It gets an EX lock on os_lockres and checks sequence number
1915 * stored in LVB. If the sequence number has changed, it means some other
1916 * node has done the scan. This node skips the scan and tracks the
1917 * sequence number. If the sequence number didn't change, it means a scan
1918 * hasn't happened. The node queues a scan and increments the
1919 * sequence number in the LVB.
1920 */
ocfs2_queue_orphan_scan(struct ocfs2_super * osb)1921 static void ocfs2_queue_orphan_scan(struct ocfs2_super *osb)
1922 {
1923 struct ocfs2_orphan_scan *os;
1924 int status, i;
1925 u32 seqno = 0;
1926
1927 os = &osb->osb_orphan_scan;
1928
1929 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
1930 goto out;
1931
1932 trace_ocfs2_queue_orphan_scan_begin(os->os_count, os->os_seqno,
1933 atomic_read(&os->os_state));
1934
1935 status = ocfs2_orphan_scan_lock(osb, &seqno);
1936 if (status < 0) {
1937 if (status != -EAGAIN)
1938 mlog_errno(status);
1939 goto out;
1940 }
1941
1942 /* Do no queue the tasks if the volume is being umounted */
1943 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
1944 goto unlock;
1945
1946 if (os->os_seqno != seqno) {
1947 os->os_seqno = seqno;
1948 goto unlock;
1949 }
1950
1951 for (i = 0; i < osb->max_slots; i++)
1952 ocfs2_queue_recovery_completion(osb->journal, i, NULL, NULL,
1953 NULL, ORPHAN_NO_NEED_TRUNCATE);
1954 /*
1955 * We queued a recovery on orphan slots, increment the sequence
1956 * number and update LVB so other node will skip the scan for a while
1957 */
1958 seqno++;
1959 os->os_count++;
1960 os->os_scantime = ktime_get_seconds();
1961 unlock:
1962 ocfs2_orphan_scan_unlock(osb, seqno);
1963 out:
1964 trace_ocfs2_queue_orphan_scan_end(os->os_count, os->os_seqno,
1965 atomic_read(&os->os_state));
1966 return;
1967 }
1968
1969 /* Worker task that gets fired every ORPHAN_SCAN_SCHEDULE_TIMEOUT millsec */
ocfs2_orphan_scan_work(struct work_struct * work)1970 static void ocfs2_orphan_scan_work(struct work_struct *work)
1971 {
1972 struct ocfs2_orphan_scan *os;
1973 struct ocfs2_super *osb;
1974
1975 os = container_of(work, struct ocfs2_orphan_scan,
1976 os_orphan_scan_work.work);
1977 osb = os->os_osb;
1978
1979 mutex_lock(&os->os_lock);
1980 ocfs2_queue_orphan_scan(osb);
1981 if (atomic_read(&os->os_state) == ORPHAN_SCAN_ACTIVE)
1982 queue_delayed_work(osb->ocfs2_wq, &os->os_orphan_scan_work,
1983 ocfs2_orphan_scan_timeout());
1984 mutex_unlock(&os->os_lock);
1985 }
1986
ocfs2_orphan_scan_stop(struct ocfs2_super * osb)1987 void ocfs2_orphan_scan_stop(struct ocfs2_super *osb)
1988 {
1989 struct ocfs2_orphan_scan *os;
1990
1991 os = &osb->osb_orphan_scan;
1992 if (atomic_read(&os->os_state) == ORPHAN_SCAN_ACTIVE) {
1993 atomic_set(&os->os_state, ORPHAN_SCAN_INACTIVE);
1994 mutex_lock(&os->os_lock);
1995 cancel_delayed_work(&os->os_orphan_scan_work);
1996 mutex_unlock(&os->os_lock);
1997 }
1998 }
1999
ocfs2_orphan_scan_init(struct ocfs2_super * osb)2000 void ocfs2_orphan_scan_init(struct ocfs2_super *osb)
2001 {
2002 struct ocfs2_orphan_scan *os;
2003
2004 os = &osb->osb_orphan_scan;
2005 os->os_osb = osb;
2006 os->os_count = 0;
2007 os->os_seqno = 0;
2008 mutex_init(&os->os_lock);
2009 INIT_DELAYED_WORK(&os->os_orphan_scan_work, ocfs2_orphan_scan_work);
2010 }
2011
ocfs2_orphan_scan_start(struct ocfs2_super * osb)2012 void ocfs2_orphan_scan_start(struct ocfs2_super *osb)
2013 {
2014 struct ocfs2_orphan_scan *os;
2015
2016 os = &osb->osb_orphan_scan;
2017 os->os_scantime = ktime_get_seconds();
2018 if (ocfs2_is_hard_readonly(osb) || ocfs2_mount_local(osb))
2019 atomic_set(&os->os_state, ORPHAN_SCAN_INACTIVE);
2020 else {
2021 atomic_set(&os->os_state, ORPHAN_SCAN_ACTIVE);
2022 queue_delayed_work(osb->ocfs2_wq, &os->os_orphan_scan_work,
2023 ocfs2_orphan_scan_timeout());
2024 }
2025 }
2026
2027 struct ocfs2_orphan_filldir_priv {
2028 struct dir_context ctx;
2029 struct inode *head;
2030 struct ocfs2_super *osb;
2031 enum ocfs2_orphan_reco_type orphan_reco_type;
2032 };
2033
ocfs2_orphan_filldir(struct dir_context * ctx,const char * name,int name_len,loff_t pos,u64 ino,unsigned type)2034 static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
2035 int name_len, loff_t pos, u64 ino,
2036 unsigned type)
2037 {
2038 struct ocfs2_orphan_filldir_priv *p =
2039 container_of(ctx, struct ocfs2_orphan_filldir_priv, ctx);
2040 struct inode *iter;
2041
2042 if (name_len == 1 && !strncmp(".", name, 1))
2043 return 0;
2044 if (name_len == 2 && !strncmp("..", name, 2))
2045 return 0;
2046
2047 /* do not include dio entry in case of orphan scan */
2048 if ((p->orphan_reco_type == ORPHAN_NO_NEED_TRUNCATE) &&
2049 (!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX,
2050 OCFS2_DIO_ORPHAN_PREFIX_LEN)))
2051 return 0;
2052
2053 /* Skip bad inodes so that recovery can continue */
2054 iter = ocfs2_iget(p->osb, ino,
2055 OCFS2_FI_FLAG_ORPHAN_RECOVERY, 0);
2056 if (IS_ERR(iter))
2057 return 0;
2058
2059 if (!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX,
2060 OCFS2_DIO_ORPHAN_PREFIX_LEN))
2061 OCFS2_I(iter)->ip_flags |= OCFS2_INODE_DIO_ORPHAN_ENTRY;
2062
2063 /* Skip inodes which are already added to recover list, since dio may
2064 * happen concurrently with unlink/rename */
2065 if (OCFS2_I(iter)->ip_next_orphan) {
2066 iput(iter);
2067 return 0;
2068 }
2069
2070 trace_ocfs2_orphan_filldir((unsigned long long)OCFS2_I(iter)->ip_blkno);
2071 /* No locking is required for the next_orphan queue as there
2072 * is only ever a single process doing orphan recovery. */
2073 OCFS2_I(iter)->ip_next_orphan = p->head;
2074 p->head = iter;
2075
2076 return 0;
2077 }
2078
ocfs2_queue_orphans(struct ocfs2_super * osb,int slot,struct inode ** head,enum ocfs2_orphan_reco_type orphan_reco_type)2079 static int ocfs2_queue_orphans(struct ocfs2_super *osb,
2080 int slot,
2081 struct inode **head,
2082 enum ocfs2_orphan_reco_type orphan_reco_type)
2083 {
2084 int status;
2085 struct inode *orphan_dir_inode = NULL;
2086 struct ocfs2_orphan_filldir_priv priv = {
2087 .ctx.actor = ocfs2_orphan_filldir,
2088 .osb = osb,
2089 .head = *head,
2090 .orphan_reco_type = orphan_reco_type
2091 };
2092
2093 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2094 ORPHAN_DIR_SYSTEM_INODE,
2095 slot);
2096 if (!orphan_dir_inode) {
2097 status = -ENOENT;
2098 mlog_errno(status);
2099 return status;
2100 }
2101
2102 inode_lock(orphan_dir_inode);
2103 status = ocfs2_inode_lock(orphan_dir_inode, NULL, 0);
2104 if (status < 0) {
2105 mlog_errno(status);
2106 goto out;
2107 }
2108
2109 status = ocfs2_dir_foreach(orphan_dir_inode, &priv.ctx);
2110 if (status) {
2111 mlog_errno(status);
2112 goto out_cluster;
2113 }
2114
2115 *head = priv.head;
2116
2117 out_cluster:
2118 ocfs2_inode_unlock(orphan_dir_inode, 0);
2119 out:
2120 inode_unlock(orphan_dir_inode);
2121 iput(orphan_dir_inode);
2122 return status;
2123 }
2124
ocfs2_orphan_recovery_can_continue(struct ocfs2_super * osb,int slot)2125 static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb,
2126 int slot)
2127 {
2128 int ret;
2129
2130 spin_lock(&osb->osb_lock);
2131 ret = !osb->osb_orphan_wipes[slot];
2132 spin_unlock(&osb->osb_lock);
2133 return ret;
2134 }
2135
ocfs2_mark_recovering_orphan_dir(struct ocfs2_super * osb,int slot)2136 static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb,
2137 int slot)
2138 {
2139 spin_lock(&osb->osb_lock);
2140 /* Mark ourselves such that new processes in delete_inode()
2141 * know to quit early. */
2142 ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot);
2143 while (osb->osb_orphan_wipes[slot]) {
2144 /* If any processes are already in the middle of an
2145 * orphan wipe on this dir, then we need to wait for
2146 * them. */
2147 spin_unlock(&osb->osb_lock);
2148 wait_event_interruptible(osb->osb_wipe_event,
2149 ocfs2_orphan_recovery_can_continue(osb, slot));
2150 spin_lock(&osb->osb_lock);
2151 }
2152 spin_unlock(&osb->osb_lock);
2153 }
2154
ocfs2_clear_recovering_orphan_dir(struct ocfs2_super * osb,int slot)2155 static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb,
2156 int slot)
2157 {
2158 ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot);
2159 }
2160
2161 /*
2162 * Orphan recovery. Each mounted node has it's own orphan dir which we
2163 * must run during recovery. Our strategy here is to build a list of
2164 * the inodes in the orphan dir and iget/iput them. The VFS does
2165 * (most) of the rest of the work.
2166 *
2167 * Orphan recovery can happen at any time, not just mount so we have a
2168 * couple of extra considerations.
2169 *
2170 * - We grab as many inodes as we can under the orphan dir lock -
2171 * doing iget() outside the orphan dir risks getting a reference on
2172 * an invalid inode.
2173 * - We must be sure not to deadlock with other processes on the
2174 * system wanting to run delete_inode(). This can happen when they go
2175 * to lock the orphan dir and the orphan recovery process attempts to
2176 * iget() inside the orphan dir lock. This can be avoided by
2177 * advertising our state to ocfs2_delete_inode().
2178 */
ocfs2_recover_orphans(struct ocfs2_super * osb,int slot,enum ocfs2_orphan_reco_type orphan_reco_type)2179 static int ocfs2_recover_orphans(struct ocfs2_super *osb,
2180 int slot,
2181 enum ocfs2_orphan_reco_type orphan_reco_type)
2182 {
2183 int ret = 0;
2184 struct inode *inode = NULL;
2185 struct inode *iter;
2186 struct ocfs2_inode_info *oi;
2187 struct buffer_head *di_bh = NULL;
2188 struct ocfs2_dinode *di = NULL;
2189
2190 trace_ocfs2_recover_orphans(slot);
2191
2192 ocfs2_mark_recovering_orphan_dir(osb, slot);
2193 ret = ocfs2_queue_orphans(osb, slot, &inode, orphan_reco_type);
2194 ocfs2_clear_recovering_orphan_dir(osb, slot);
2195
2196 /* Error here should be noted, but we want to continue with as
2197 * many queued inodes as we've got. */
2198 if (ret)
2199 mlog_errno(ret);
2200
2201 while (inode) {
2202 oi = OCFS2_I(inode);
2203 trace_ocfs2_recover_orphans_iput(
2204 (unsigned long long)oi->ip_blkno);
2205
2206 iter = oi->ip_next_orphan;
2207 oi->ip_next_orphan = NULL;
2208
2209 if (oi->ip_flags & OCFS2_INODE_DIO_ORPHAN_ENTRY) {
2210 inode_lock(inode);
2211 ret = ocfs2_rw_lock(inode, 1);
2212 if (ret < 0) {
2213 mlog_errno(ret);
2214 goto unlock_mutex;
2215 }
2216 /*
2217 * We need to take and drop the inode lock to
2218 * force read inode from disk.
2219 */
2220 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2221 if (ret) {
2222 mlog_errno(ret);
2223 goto unlock_rw;
2224 }
2225
2226 di = (struct ocfs2_dinode *)di_bh->b_data;
2227
2228 if (di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)) {
2229 ret = ocfs2_truncate_file(inode, di_bh,
2230 i_size_read(inode));
2231 if (ret < 0) {
2232 if (ret != -ENOSPC)
2233 mlog_errno(ret);
2234 goto unlock_inode;
2235 }
2236
2237 ret = ocfs2_del_inode_from_orphan(osb, inode,
2238 di_bh, 0, 0);
2239 if (ret)
2240 mlog_errno(ret);
2241 }
2242 unlock_inode:
2243 ocfs2_inode_unlock(inode, 1);
2244 brelse(di_bh);
2245 di_bh = NULL;
2246 unlock_rw:
2247 ocfs2_rw_unlock(inode, 1);
2248 unlock_mutex:
2249 inode_unlock(inode);
2250
2251 /* clear dio flag in ocfs2_inode_info */
2252 oi->ip_flags &= ~OCFS2_INODE_DIO_ORPHAN_ENTRY;
2253 } else {
2254 spin_lock(&oi->ip_lock);
2255 /* Set the proper information to get us going into
2256 * ocfs2_delete_inode. */
2257 oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED;
2258 spin_unlock(&oi->ip_lock);
2259 }
2260
2261 iput(inode);
2262 inode = iter;
2263 }
2264
2265 return ret;
2266 }
2267
__ocfs2_wait_on_mount(struct ocfs2_super * osb,int quota)2268 static int __ocfs2_wait_on_mount(struct ocfs2_super *osb, int quota)
2269 {
2270 /* This check is good because ocfs2 will wait on our recovery
2271 * thread before changing it to something other than MOUNTED
2272 * or DISABLED. */
2273 wait_event(osb->osb_mount_event,
2274 (!quota && atomic_read(&osb->vol_state) == VOLUME_MOUNTED) ||
2275 atomic_read(&osb->vol_state) == VOLUME_MOUNTED_QUOTAS ||
2276 atomic_read(&osb->vol_state) == VOLUME_DISABLED);
2277
2278 /* If there's an error on mount, then we may never get to the
2279 * MOUNTED flag, but this is set right before
2280 * dismount_volume() so we can trust it. */
2281 if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) {
2282 trace_ocfs2_wait_on_mount(VOLUME_DISABLED);
2283 mlog(0, "mount error, exiting!\n");
2284 return -EBUSY;
2285 }
2286
2287 return 0;
2288 }
2289
ocfs2_commit_thread(void * arg)2290 static int ocfs2_commit_thread(void *arg)
2291 {
2292 int status;
2293 struct ocfs2_super *osb = arg;
2294 struct ocfs2_journal *journal = osb->journal;
2295
2296 /* we can trust j_num_trans here because _should_stop() is only set in
2297 * shutdown and nobody other than ourselves should be able to start
2298 * transactions. committing on shutdown might take a few iterations
2299 * as final transactions put deleted inodes on the list */
2300 while (!(kthread_should_stop() &&
2301 atomic_read(&journal->j_num_trans) == 0)) {
2302
2303 wait_event_interruptible(osb->checkpoint_event,
2304 atomic_read(&journal->j_num_trans)
2305 || kthread_should_stop());
2306
2307 status = ocfs2_commit_cache(osb);
2308 if (status < 0) {
2309 static unsigned long abort_warn_time;
2310
2311 /* Warn about this once per minute */
2312 if (printk_timed_ratelimit(&abort_warn_time, 60*HZ))
2313 mlog(ML_ERROR, "status = %d, journal is "
2314 "already aborted.\n", status);
2315 /*
2316 * After ocfs2_commit_cache() fails, j_num_trans has a
2317 * non-zero value. Sleep here to avoid a busy-wait
2318 * loop.
2319 */
2320 msleep_interruptible(1000);
2321 }
2322
2323 if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){
2324 mlog(ML_KTHREAD,
2325 "commit_thread: %u transactions pending on "
2326 "shutdown\n",
2327 atomic_read(&journal->j_num_trans));
2328 }
2329 }
2330
2331 return 0;
2332 }
2333
2334 /* Reads all the journal inodes without taking any cluster locks. Used
2335 * for hard readonly access to determine whether any journal requires
2336 * recovery. Also used to refresh the recovery generation numbers after
2337 * a journal has been recovered by another node.
2338 */
ocfs2_check_journals_nolocks(struct ocfs2_super * osb)2339 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb)
2340 {
2341 int ret = 0;
2342 unsigned int slot;
2343 struct buffer_head *di_bh = NULL;
2344 struct ocfs2_dinode *di;
2345 int journal_dirty = 0;
2346
2347 for(slot = 0; slot < osb->max_slots; slot++) {
2348 ret = ocfs2_read_journal_inode(osb, slot, &di_bh, NULL);
2349 if (ret) {
2350 mlog_errno(ret);
2351 goto out;
2352 }
2353
2354 di = (struct ocfs2_dinode *) di_bh->b_data;
2355
2356 osb->slot_recovery_generations[slot] =
2357 ocfs2_get_recovery_generation(di);
2358
2359 if (le32_to_cpu(di->id1.journal1.ij_flags) &
2360 OCFS2_JOURNAL_DIRTY_FL)
2361 journal_dirty = 1;
2362
2363 brelse(di_bh);
2364 di_bh = NULL;
2365 }
2366
2367 out:
2368 if (journal_dirty)
2369 ret = -EROFS;
2370 return ret;
2371 }
2372