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470decc6 DK |
1 | /* |
2 | * linux/fs/recovery.c | |
3 | * | |
4 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 | |
5 | * | |
6 | * Copyright 1999-2000 Red Hat Software --- All Rights Reserved | |
7 | * | |
8 | * This file is part of the Linux kernel and is made available under | |
9 | * the terms of the GNU General Public License, version 2, or at your | |
10 | * option, any later version, incorporated herein by reference. | |
11 | * | |
12 | * Journal recovery routines for the generic filesystem journaling code; | |
13 | * part of the ext2fs journaling system. | |
14 | */ | |
15 | ||
16 | #ifndef __KERNEL__ | |
17 | #include "jfs_user.h" | |
18 | #else | |
19 | #include <linux/time.h> | |
20 | #include <linux/fs.h> | |
f7f4bccb | 21 | #include <linux/jbd2.h> |
470decc6 DK |
22 | #include <linux/errno.h> |
23 | #include <linux/slab.h> | |
24 | #endif | |
25 | ||
26 | /* | |
27 | * Maintain information about the progress of the recovery job, so that | |
28 | * the different passes can carry information between them. | |
29 | */ | |
30 | struct recovery_info | |
31 | { | |
32 | tid_t start_transaction; | |
33 | tid_t end_transaction; | |
34 | ||
35 | int nr_replays; | |
36 | int nr_revokes; | |
37 | int nr_revoke_hits; | |
38 | }; | |
39 | ||
40 | enum passtype {PASS_SCAN, PASS_REVOKE, PASS_REPLAY}; | |
41 | static int do_one_pass(journal_t *journal, | |
42 | struct recovery_info *info, enum passtype pass); | |
43 | static int scan_revoke_records(journal_t *, struct buffer_head *, | |
44 | tid_t, struct recovery_info *); | |
45 | ||
46 | #ifdef __KERNEL__ | |
47 | ||
48 | /* Release readahead buffers after use */ | |
49 | static void journal_brelse_array(struct buffer_head *b[], int n) | |
50 | { | |
51 | while (--n >= 0) | |
52 | brelse (b[n]); | |
53 | } | |
54 | ||
55 | ||
56 | /* | |
57 | * When reading from the journal, we are going through the block device | |
58 | * layer directly and so there is no readahead being done for us. We | |
59 | * need to implement any readahead ourselves if we want it to happen at | |
60 | * all. Recovery is basically one long sequential read, so make sure we | |
61 | * do the IO in reasonably large chunks. | |
62 | * | |
63 | * This is not so critical that we need to be enormously clever about | |
64 | * the readahead size, though. 128K is a purely arbitrary, good-enough | |
65 | * fixed value. | |
66 | */ | |
67 | ||
68 | #define MAXBUF 8 | |
69 | static int do_readahead(journal_t *journal, unsigned int start) | |
70 | { | |
71 | int err; | |
72 | unsigned int max, nbufs, next; | |
29971769 | 73 | sector_t blocknr; |
470decc6 DK |
74 | struct buffer_head *bh; |
75 | ||
76 | struct buffer_head * bufs[MAXBUF]; | |
77 | ||
78 | /* Do up to 128K of readahead */ | |
79 | max = start + (128 * 1024 / journal->j_blocksize); | |
80 | if (max > journal->j_maxlen) | |
81 | max = journal->j_maxlen; | |
82 | ||
83 | /* Do the readahead itself. We'll submit MAXBUF buffer_heads at | |
84 | * a time to the block device IO layer. */ | |
85 | ||
86 | nbufs = 0; | |
87 | ||
88 | for (next = start; next < max; next++) { | |
f7f4bccb | 89 | err = jbd2_journal_bmap(journal, next, &blocknr); |
470decc6 DK |
90 | |
91 | if (err) { | |
92 | printk (KERN_ERR "JBD: bad block at offset %u\n", | |
93 | next); | |
94 | goto failed; | |
95 | } | |
96 | ||
97 | bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize); | |
98 | if (!bh) { | |
99 | err = -ENOMEM; | |
100 | goto failed; | |
101 | } | |
102 | ||
103 | if (!buffer_uptodate(bh) && !buffer_locked(bh)) { | |
104 | bufs[nbufs++] = bh; | |
105 | if (nbufs == MAXBUF) { | |
106 | ll_rw_block(READ, nbufs, bufs); | |
107 | journal_brelse_array(bufs, nbufs); | |
108 | nbufs = 0; | |
109 | } | |
110 | } else | |
111 | brelse(bh); | |
112 | } | |
113 | ||
114 | if (nbufs) | |
115 | ll_rw_block(READ, nbufs, bufs); | |
116 | err = 0; | |
117 | ||
118 | failed: | |
119 | if (nbufs) | |
120 | journal_brelse_array(bufs, nbufs); | |
121 | return err; | |
122 | } | |
123 | ||
124 | #endif /* __KERNEL__ */ | |
125 | ||
126 | ||
127 | /* | |
128 | * Read a block from the journal | |
129 | */ | |
130 | ||
131 | static int jread(struct buffer_head **bhp, journal_t *journal, | |
132 | unsigned int offset) | |
133 | { | |
134 | int err; | |
29971769 | 135 | sector_t blocknr; |
470decc6 DK |
136 | struct buffer_head *bh; |
137 | ||
138 | *bhp = NULL; | |
139 | ||
140 | if (offset >= journal->j_maxlen) { | |
141 | printk(KERN_ERR "JBD: corrupted journal superblock\n"); | |
142 | return -EIO; | |
143 | } | |
144 | ||
f7f4bccb | 145 | err = jbd2_journal_bmap(journal, offset, &blocknr); |
470decc6 DK |
146 | |
147 | if (err) { | |
148 | printk (KERN_ERR "JBD: bad block at offset %u\n", | |
149 | offset); | |
150 | return err; | |
151 | } | |
152 | ||
153 | bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize); | |
154 | if (!bh) | |
155 | return -ENOMEM; | |
156 | ||
157 | if (!buffer_uptodate(bh)) { | |
158 | /* If this is a brand new buffer, start readahead. | |
159 | Otherwise, we assume we are already reading it. */ | |
160 | if (!buffer_req(bh)) | |
161 | do_readahead(journal, offset); | |
162 | wait_on_buffer(bh); | |
163 | } | |
164 | ||
165 | if (!buffer_uptodate(bh)) { | |
166 | printk (KERN_ERR "JBD: Failed to read block at offset %u\n", | |
167 | offset); | |
168 | brelse(bh); | |
169 | return -EIO; | |
170 | } | |
171 | ||
172 | *bhp = bh; | |
173 | return 0; | |
174 | } | |
175 | ||
176 | ||
177 | /* | |
178 | * Count the number of in-use tags in a journal descriptor block. | |
179 | */ | |
180 | ||
b517bea1 | 181 | static int count_tags(journal_t *journal, struct buffer_head *bh) |
470decc6 DK |
182 | { |
183 | char * tagp; | |
184 | journal_block_tag_t * tag; | |
b517bea1 ZB |
185 | int nr = 0, size = journal->j_blocksize; |
186 | int tag_bytes = journal_tag_bytes(journal); | |
470decc6 DK |
187 | |
188 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
189 | ||
b517bea1 | 190 | while ((tagp - bh->b_data + tag_bytes) <= size) { |
470decc6 DK |
191 | tag = (journal_block_tag_t *) tagp; |
192 | ||
193 | nr++; | |
b517bea1 | 194 | tagp += tag_bytes; |
f7f4bccb | 195 | if (!(tag->t_flags & cpu_to_be32(JBD2_FLAG_SAME_UUID))) |
470decc6 DK |
196 | tagp += 16; |
197 | ||
f7f4bccb | 198 | if (tag->t_flags & cpu_to_be32(JBD2_FLAG_LAST_TAG)) |
470decc6 DK |
199 | break; |
200 | } | |
201 | ||
202 | return nr; | |
203 | } | |
204 | ||
205 | ||
206 | /* Make sure we wrap around the log correctly! */ | |
207 | #define wrap(journal, var) \ | |
208 | do { \ | |
209 | if (var >= (journal)->j_last) \ | |
210 | var -= ((journal)->j_last - (journal)->j_first); \ | |
211 | } while (0) | |
212 | ||
213 | /** | |
f7f4bccb | 214 | * jbd2_journal_recover - recovers a on-disk journal |
470decc6 DK |
215 | * @journal: the journal to recover |
216 | * | |
217 | * The primary function for recovering the log contents when mounting a | |
218 | * journaled device. | |
219 | * | |
220 | * Recovery is done in three passes. In the first pass, we look for the | |
221 | * end of the log. In the second, we assemble the list of revoke | |
222 | * blocks. In the third and final pass, we replay any un-revoked blocks | |
223 | * in the log. | |
224 | */ | |
f7f4bccb | 225 | int jbd2_journal_recover(journal_t *journal) |
470decc6 DK |
226 | { |
227 | int err; | |
228 | journal_superblock_t * sb; | |
229 | ||
230 | struct recovery_info info; | |
231 | ||
232 | memset(&info, 0, sizeof(info)); | |
233 | sb = journal->j_superblock; | |
234 | ||
235 | /* | |
236 | * The journal superblock's s_start field (the current log head) | |
237 | * is always zero if, and only if, the journal was cleanly | |
238 | * unmounted. | |
239 | */ | |
240 | ||
241 | if (!sb->s_start) { | |
242 | jbd_debug(1, "No recovery required, last transaction %d\n", | |
243 | be32_to_cpu(sb->s_sequence)); | |
244 | journal->j_transaction_sequence = be32_to_cpu(sb->s_sequence) + 1; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | err = do_one_pass(journal, &info, PASS_SCAN); | |
249 | if (!err) | |
250 | err = do_one_pass(journal, &info, PASS_REVOKE); | |
251 | if (!err) | |
252 | err = do_one_pass(journal, &info, PASS_REPLAY); | |
253 | ||
254 | jbd_debug(0, "JBD: recovery, exit status %d, " | |
255 | "recovered transactions %u to %u\n", | |
256 | err, info.start_transaction, info.end_transaction); | |
257 | jbd_debug(0, "JBD: Replayed %d and revoked %d/%d blocks\n", | |
258 | info.nr_replays, info.nr_revoke_hits, info.nr_revokes); | |
259 | ||
260 | /* Restart the log at the next transaction ID, thus invalidating | |
261 | * any existing commit records in the log. */ | |
262 | journal->j_transaction_sequence = ++info.end_transaction; | |
263 | ||
f7f4bccb | 264 | jbd2_journal_clear_revoke(journal); |
470decc6 DK |
265 | sync_blockdev(journal->j_fs_dev); |
266 | return err; | |
267 | } | |
268 | ||
269 | /** | |
f7f4bccb | 270 | * jbd2_journal_skip_recovery - Start journal and wipe exiting records |
470decc6 DK |
271 | * @journal: journal to startup |
272 | * | |
273 | * Locate any valid recovery information from the journal and set up the | |
274 | * journal structures in memory to ignore it (presumably because the | |
275 | * caller has evidence that it is out of date). | |
276 | * This function does'nt appear to be exorted.. | |
277 | * | |
278 | * We perform one pass over the journal to allow us to tell the user how | |
279 | * much recovery information is being erased, and to let us initialise | |
280 | * the journal transaction sequence numbers to the next unused ID. | |
281 | */ | |
f7f4bccb | 282 | int jbd2_journal_skip_recovery(journal_t *journal) |
470decc6 DK |
283 | { |
284 | int err; | |
285 | journal_superblock_t * sb; | |
286 | ||
287 | struct recovery_info info; | |
288 | ||
289 | memset (&info, 0, sizeof(info)); | |
290 | sb = journal->j_superblock; | |
291 | ||
292 | err = do_one_pass(journal, &info, PASS_SCAN); | |
293 | ||
294 | if (err) { | |
295 | printk(KERN_ERR "JBD: error %d scanning journal\n", err); | |
296 | ++journal->j_transaction_sequence; | |
297 | } else { | |
298 | #ifdef CONFIG_JBD_DEBUG | |
299 | int dropped = info.end_transaction - be32_to_cpu(sb->s_sequence); | |
300 | #endif | |
301 | jbd_debug(0, | |
302 | "JBD: ignoring %d transaction%s from the journal.\n", | |
303 | dropped, (dropped == 1) ? "" : "s"); | |
304 | journal->j_transaction_sequence = ++info.end_transaction; | |
305 | } | |
306 | ||
307 | journal->j_tail = 0; | |
308 | return err; | |
309 | } | |
310 | ||
b517bea1 ZB |
311 | static inline sector_t read_tag_block(int tag_bytes, journal_block_tag_t *tag) |
312 | { | |
313 | sector_t block = be32_to_cpu(tag->t_blocknr); | |
314 | if (tag_bytes > JBD_TAG_SIZE32) | |
315 | block |= (u64)be32_to_cpu(tag->t_blocknr_high) << 32; | |
316 | return block; | |
317 | } | |
318 | ||
470decc6 DK |
319 | static int do_one_pass(journal_t *journal, |
320 | struct recovery_info *info, enum passtype pass) | |
321 | { | |
322 | unsigned int first_commit_ID, next_commit_ID; | |
323 | unsigned long next_log_block; | |
324 | int err, success = 0; | |
325 | journal_superblock_t * sb; | |
326 | journal_header_t * tmp; | |
327 | struct buffer_head * bh; | |
328 | unsigned int sequence; | |
329 | int blocktype; | |
b517bea1 | 330 | int tag_bytes = journal_tag_bytes(journal); |
470decc6 DK |
331 | |
332 | /* Precompute the maximum metadata descriptors in a descriptor block */ | |
333 | int MAX_BLOCKS_PER_DESC; | |
334 | MAX_BLOCKS_PER_DESC = ((journal->j_blocksize-sizeof(journal_header_t)) | |
b517bea1 | 335 | / tag_bytes); |
470decc6 DK |
336 | |
337 | /* | |
338 | * First thing is to establish what we expect to find in the log | |
339 | * (in terms of transaction IDs), and where (in terms of log | |
340 | * block offsets): query the superblock. | |
341 | */ | |
342 | ||
343 | sb = journal->j_superblock; | |
344 | next_commit_ID = be32_to_cpu(sb->s_sequence); | |
345 | next_log_block = be32_to_cpu(sb->s_start); | |
346 | ||
347 | first_commit_ID = next_commit_ID; | |
348 | if (pass == PASS_SCAN) | |
349 | info->start_transaction = first_commit_ID; | |
350 | ||
351 | jbd_debug(1, "Starting recovery pass %d\n", pass); | |
352 | ||
353 | /* | |
354 | * Now we walk through the log, transaction by transaction, | |
355 | * making sure that each transaction has a commit block in the | |
356 | * expected place. Each complete transaction gets replayed back | |
357 | * into the main filesystem. | |
358 | */ | |
359 | ||
360 | while (1) { | |
361 | int flags; | |
362 | char * tagp; | |
363 | journal_block_tag_t * tag; | |
364 | struct buffer_head * obh; | |
365 | struct buffer_head * nbh; | |
366 | ||
367 | cond_resched(); /* We're under lock_kernel() */ | |
368 | ||
369 | /* If we already know where to stop the log traversal, | |
370 | * check right now that we haven't gone past the end of | |
371 | * the log. */ | |
372 | ||
373 | if (pass != PASS_SCAN) | |
374 | if (tid_geq(next_commit_ID, info->end_transaction)) | |
375 | break; | |
376 | ||
377 | jbd_debug(2, "Scanning for sequence ID %u at %lu/%lu\n", | |
378 | next_commit_ID, next_log_block, journal->j_last); | |
379 | ||
380 | /* Skip over each chunk of the transaction looking | |
381 | * either the next descriptor block or the final commit | |
382 | * record. */ | |
383 | ||
384 | jbd_debug(3, "JBD: checking block %ld\n", next_log_block); | |
385 | err = jread(&bh, journal, next_log_block); | |
386 | if (err) | |
387 | goto failed; | |
388 | ||
389 | next_log_block++; | |
390 | wrap(journal, next_log_block); | |
391 | ||
392 | /* What kind of buffer is it? | |
393 | * | |
394 | * If it is a descriptor block, check that it has the | |
395 | * expected sequence number. Otherwise, we're all done | |
396 | * here. */ | |
397 | ||
398 | tmp = (journal_header_t *)bh->b_data; | |
399 | ||
f7f4bccb | 400 | if (tmp->h_magic != cpu_to_be32(JBD2_MAGIC_NUMBER)) { |
470decc6 DK |
401 | brelse(bh); |
402 | break; | |
403 | } | |
404 | ||
405 | blocktype = be32_to_cpu(tmp->h_blocktype); | |
406 | sequence = be32_to_cpu(tmp->h_sequence); | |
407 | jbd_debug(3, "Found magic %d, sequence %d\n", | |
408 | blocktype, sequence); | |
409 | ||
410 | if (sequence != next_commit_ID) { | |
411 | brelse(bh); | |
412 | break; | |
413 | } | |
414 | ||
415 | /* OK, we have a valid descriptor block which matches | |
416 | * all of the sequence number checks. What are we going | |
417 | * to do with it? That depends on the pass... */ | |
418 | ||
419 | switch(blocktype) { | |
f7f4bccb | 420 | case JBD2_DESCRIPTOR_BLOCK: |
470decc6 DK |
421 | /* If it is a valid descriptor block, replay it |
422 | * in pass REPLAY; otherwise, just skip over the | |
423 | * blocks it describes. */ | |
424 | if (pass != PASS_REPLAY) { | |
b517bea1 | 425 | next_log_block += count_tags(journal, bh); |
470decc6 DK |
426 | wrap(journal, next_log_block); |
427 | brelse(bh); | |
428 | continue; | |
429 | } | |
430 | ||
431 | /* A descriptor block: we can now write all of | |
432 | * the data blocks. Yay, useful work is finally | |
433 | * getting done here! */ | |
434 | ||
435 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
b517bea1 | 436 | while ((tagp - bh->b_data + tag_bytes) |
470decc6 DK |
437 | <= journal->j_blocksize) { |
438 | unsigned long io_block; | |
439 | ||
440 | tag = (journal_block_tag_t *) tagp; | |
441 | flags = be32_to_cpu(tag->t_flags); | |
442 | ||
443 | io_block = next_log_block++; | |
444 | wrap(journal, next_log_block); | |
445 | err = jread(&obh, journal, io_block); | |
446 | if (err) { | |
447 | /* Recover what we can, but | |
448 | * report failure at the end. */ | |
449 | success = err; | |
450 | printk (KERN_ERR | |
451 | "JBD: IO error %d recovering " | |
452 | "block %ld in log\n", | |
453 | err, io_block); | |
454 | } else { | |
29971769 | 455 | sector_t blocknr; |
470decc6 DK |
456 | |
457 | J_ASSERT(obh != NULL); | |
b517bea1 ZB |
458 | blocknr = read_tag_block(tag_bytes, |
459 | tag); | |
470decc6 DK |
460 | |
461 | /* If the block has been | |
462 | * revoked, then we're all done | |
463 | * here. */ | |
f7f4bccb | 464 | if (jbd2_journal_test_revoke |
470decc6 DK |
465 | (journal, blocknr, |
466 | next_commit_ID)) { | |
467 | brelse(obh); | |
468 | ++info->nr_revoke_hits; | |
469 | goto skip_write; | |
470 | } | |
471 | ||
472 | /* Find a buffer for the new | |
473 | * data being restored */ | |
474 | nbh = __getblk(journal->j_fs_dev, | |
475 | blocknr, | |
476 | journal->j_blocksize); | |
477 | if (nbh == NULL) { | |
478 | printk(KERN_ERR | |
479 | "JBD: Out of memory " | |
480 | "during recovery.\n"); | |
481 | err = -ENOMEM; | |
482 | brelse(bh); | |
483 | brelse(obh); | |
484 | goto failed; | |
485 | } | |
486 | ||
487 | lock_buffer(nbh); | |
488 | memcpy(nbh->b_data, obh->b_data, | |
489 | journal->j_blocksize); | |
f7f4bccb | 490 | if (flags & JBD2_FLAG_ESCAPE) { |
470decc6 | 491 | *((__be32 *)bh->b_data) = |
f7f4bccb | 492 | cpu_to_be32(JBD2_MAGIC_NUMBER); |
470decc6 DK |
493 | } |
494 | ||
495 | BUFFER_TRACE(nbh, "marking dirty"); | |
496 | set_buffer_uptodate(nbh); | |
497 | mark_buffer_dirty(nbh); | |
498 | BUFFER_TRACE(nbh, "marking uptodate"); | |
499 | ++info->nr_replays; | |
500 | /* ll_rw_block(WRITE, 1, &nbh); */ | |
501 | unlock_buffer(nbh); | |
502 | brelse(obh); | |
503 | brelse(nbh); | |
504 | } | |
505 | ||
506 | skip_write: | |
b517bea1 | 507 | tagp += tag_bytes; |
f7f4bccb | 508 | if (!(flags & JBD2_FLAG_SAME_UUID)) |
470decc6 DK |
509 | tagp += 16; |
510 | ||
f7f4bccb | 511 | if (flags & JBD2_FLAG_LAST_TAG) |
470decc6 DK |
512 | break; |
513 | } | |
514 | ||
515 | brelse(bh); | |
516 | continue; | |
517 | ||
f7f4bccb | 518 | case JBD2_COMMIT_BLOCK: |
470decc6 DK |
519 | /* Found an expected commit block: not much to |
520 | * do other than move on to the next sequence | |
521 | * number. */ | |
522 | brelse(bh); | |
523 | next_commit_ID++; | |
524 | continue; | |
525 | ||
f7f4bccb | 526 | case JBD2_REVOKE_BLOCK: |
470decc6 DK |
527 | /* If we aren't in the REVOKE pass, then we can |
528 | * just skip over this block. */ | |
529 | if (pass != PASS_REVOKE) { | |
530 | brelse(bh); | |
531 | continue; | |
532 | } | |
533 | ||
534 | err = scan_revoke_records(journal, bh, | |
535 | next_commit_ID, info); | |
536 | brelse(bh); | |
537 | if (err) | |
538 | goto failed; | |
539 | continue; | |
540 | ||
541 | default: | |
542 | jbd_debug(3, "Unrecognised magic %d, end of scan.\n", | |
543 | blocktype); | |
544 | brelse(bh); | |
545 | goto done; | |
546 | } | |
547 | } | |
548 | ||
549 | done: | |
550 | /* | |
551 | * We broke out of the log scan loop: either we came to the | |
552 | * known end of the log or we found an unexpected block in the | |
553 | * log. If the latter happened, then we know that the "current" | |
554 | * transaction marks the end of the valid log. | |
555 | */ | |
556 | ||
557 | if (pass == PASS_SCAN) | |
558 | info->end_transaction = next_commit_ID; | |
559 | else { | |
560 | /* It's really bad news if different passes end up at | |
561 | * different places (but possible due to IO errors). */ | |
562 | if (info->end_transaction != next_commit_ID) { | |
563 | printk (KERN_ERR "JBD: recovery pass %d ended at " | |
564 | "transaction %u, expected %u\n", | |
565 | pass, next_commit_ID, info->end_transaction); | |
566 | if (!success) | |
567 | success = -EIO; | |
568 | } | |
569 | } | |
570 | ||
571 | return success; | |
572 | ||
573 | failed: | |
574 | return err; | |
575 | } | |
576 | ||
577 | ||
578 | /* Scan a revoke record, marking all blocks mentioned as revoked. */ | |
579 | ||
580 | static int scan_revoke_records(journal_t *journal, struct buffer_head *bh, | |
581 | tid_t sequence, struct recovery_info *info) | |
582 | { | |
f7f4bccb | 583 | jbd2_journal_revoke_header_t *header; |
470decc6 | 584 | int offset, max; |
b517bea1 | 585 | int record_len = 4; |
470decc6 | 586 | |
f7f4bccb MC |
587 | header = (jbd2_journal_revoke_header_t *) bh->b_data; |
588 | offset = sizeof(jbd2_journal_revoke_header_t); | |
470decc6 DK |
589 | max = be32_to_cpu(header->r_count); |
590 | ||
b517bea1 ZB |
591 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT)) |
592 | record_len = 8; | |
593 | ||
594 | while (offset + record_len <= max) { | |
29971769 | 595 | sector_t blocknr; |
470decc6 DK |
596 | int err; |
597 | ||
b517bea1 ZB |
598 | if (record_len == 4) |
599 | blocknr = be32_to_cpu(* ((__be32 *) (bh->b_data+offset))); | |
600 | else | |
601 | blocknr = be64_to_cpu(* ((__be64 *) (bh->b_data+offset))); | |
602 | offset += record_len; | |
f7f4bccb | 603 | err = jbd2_journal_set_revoke(journal, blocknr, sequence); |
470decc6 DK |
604 | if (err) |
605 | return err; | |
606 | ++info->nr_revokes; | |
607 | } | |
608 | return 0; | |
609 | } |