Commit | Line | Data |
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470decc6 | 1 | /* |
f7f4bccb | 2 | * linux/fs/jbd2/commit.c |
470decc6 DK |
3 | * |
4 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1998 | |
5 | * | |
6 | * Copyright 1998 Red Hat corp --- 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 commit routines for the generic filesystem journaling code; | |
13 | * part of the ext2fs journaling system. | |
14 | */ | |
15 | ||
16 | #include <linux/time.h> | |
17 | #include <linux/fs.h> | |
f7f4bccb | 18 | #include <linux/jbd2.h> |
470decc6 DK |
19 | #include <linux/errno.h> |
20 | #include <linux/slab.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/pagemap.h> | |
8e85fb3f | 23 | #include <linux/jiffies.h> |
818d276c | 24 | #include <linux/crc32.h> |
470decc6 DK |
25 | |
26 | /* | |
27 | * Default IO end handler for temporary BJ_IO buffer_heads. | |
28 | */ | |
29 | static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate) | |
30 | { | |
31 | BUFFER_TRACE(bh, ""); | |
32 | if (uptodate) | |
33 | set_buffer_uptodate(bh); | |
34 | else | |
35 | clear_buffer_uptodate(bh); | |
36 | unlock_buffer(bh); | |
37 | } | |
38 | ||
39 | /* | |
40 | * When an ext3-ordered file is truncated, it is possible that many pages are | |
41 | * not sucessfully freed, because they are attached to a committing transaction. | |
42 | * After the transaction commits, these pages are left on the LRU, with no | |
43 | * ->mapping, and with attached buffers. These pages are trivially reclaimable | |
44 | * by the VM, but their apparent absence upsets the VM accounting, and it makes | |
45 | * the numbers in /proc/meminfo look odd. | |
46 | * | |
47 | * So here, we have a buffer which has just come off the forget list. Look to | |
48 | * see if we can strip all buffers from the backing page. | |
49 | * | |
50 | * Called under lock_journal(), and possibly under journal_datalist_lock. The | |
51 | * caller provided us with a ref against the buffer, and we drop that here. | |
52 | */ | |
53 | static void release_buffer_page(struct buffer_head *bh) | |
54 | { | |
55 | struct page *page; | |
56 | ||
57 | if (buffer_dirty(bh)) | |
58 | goto nope; | |
59 | if (atomic_read(&bh->b_count) != 1) | |
60 | goto nope; | |
61 | page = bh->b_page; | |
62 | if (!page) | |
63 | goto nope; | |
64 | if (page->mapping) | |
65 | goto nope; | |
66 | ||
67 | /* OK, it's a truncated page */ | |
68 | if (TestSetPageLocked(page)) | |
69 | goto nope; | |
70 | ||
71 | page_cache_get(page); | |
72 | __brelse(bh); | |
73 | try_to_free_buffers(page); | |
74 | unlock_page(page); | |
75 | page_cache_release(page); | |
76 | return; | |
77 | ||
78 | nope: | |
79 | __brelse(bh); | |
80 | } | |
81 | ||
82 | /* | |
83 | * Try to acquire jbd_lock_bh_state() against the buffer, when j_list_lock is | |
84 | * held. For ranking reasons we must trylock. If we lose, schedule away and | |
85 | * return 0. j_list_lock is dropped in this case. | |
86 | */ | |
87 | static int inverted_lock(journal_t *journal, struct buffer_head *bh) | |
88 | { | |
89 | if (!jbd_trylock_bh_state(bh)) { | |
90 | spin_unlock(&journal->j_list_lock); | |
91 | schedule(); | |
92 | return 0; | |
93 | } | |
94 | return 1; | |
95 | } | |
96 | ||
818d276c GS |
97 | /* |
98 | * Done it all: now submit the commit record. We should have | |
470decc6 DK |
99 | * cleaned up our previous buffers by now, so if we are in abort |
100 | * mode we can now just skip the rest of the journal write | |
101 | * entirely. | |
102 | * | |
103 | * Returns 1 if the journal needs to be aborted or 0 on success | |
104 | */ | |
818d276c GS |
105 | static int journal_submit_commit_record(journal_t *journal, |
106 | transaction_t *commit_transaction, | |
107 | struct buffer_head **cbh, | |
108 | __u32 crc32_sum) | |
470decc6 DK |
109 | { |
110 | struct journal_head *descriptor; | |
818d276c | 111 | struct commit_header *tmp; |
470decc6 | 112 | struct buffer_head *bh; |
818d276c | 113 | int ret; |
470decc6 DK |
114 | int barrier_done = 0; |
115 | ||
116 | if (is_journal_aborted(journal)) | |
117 | return 0; | |
118 | ||
f7f4bccb | 119 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 DK |
120 | if (!descriptor) |
121 | return 1; | |
122 | ||
123 | bh = jh2bh(descriptor); | |
124 | ||
818d276c GS |
125 | tmp = (struct commit_header *)bh->b_data; |
126 | tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); | |
127 | tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); | |
128 | tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); | |
129 | ||
130 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
131 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
132 | tmp->h_chksum_type = JBD2_CRC32_CHKSUM; | |
133 | tmp->h_chksum_size = JBD2_CRC32_CHKSUM_SIZE; | |
134 | tmp->h_chksum[0] = cpu_to_be32(crc32_sum); | |
470decc6 DK |
135 | } |
136 | ||
818d276c GS |
137 | JBUFFER_TRACE(descriptor, "submit commit block"); |
138 | lock_buffer(bh); | |
c4b8e635 | 139 | get_bh(bh); |
470decc6 | 140 | set_buffer_dirty(bh); |
818d276c GS |
141 | set_buffer_uptodate(bh); |
142 | bh->b_end_io = journal_end_buffer_io_sync; | |
143 | ||
144 | if (journal->j_flags & JBD2_BARRIER && | |
4d605179 | 145 | !JBD2_HAS_INCOMPAT_FEATURE(journal, |
818d276c | 146 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
470decc6 DK |
147 | set_buffer_ordered(bh); |
148 | barrier_done = 1; | |
149 | } | |
818d276c | 150 | ret = submit_bh(WRITE, bh); |
c4e35e07 DK |
151 | if (barrier_done) |
152 | clear_buffer_ordered(bh); | |
818d276c | 153 | |
470decc6 DK |
154 | /* is it possible for another commit to fail at roughly |
155 | * the same time as this one? If so, we don't want to | |
156 | * trust the barrier flag in the super, but instead want | |
157 | * to remember if we sent a barrier request | |
158 | */ | |
159 | if (ret == -EOPNOTSUPP && barrier_done) { | |
160 | char b[BDEVNAME_SIZE]; | |
161 | ||
162 | printk(KERN_WARNING | |
163 | "JBD: barrier-based sync failed on %s - " | |
164 | "disabling barriers\n", | |
165 | bdevname(journal->j_dev, b)); | |
166 | spin_lock(&journal->j_state_lock); | |
f7f4bccb | 167 | journal->j_flags &= ~JBD2_BARRIER; |
470decc6 DK |
168 | spin_unlock(&journal->j_state_lock); |
169 | ||
170 | /* And try again, without the barrier */ | |
034772b0 | 171 | lock_buffer(bh); |
470decc6 DK |
172 | set_buffer_uptodate(bh); |
173 | set_buffer_dirty(bh); | |
818d276c | 174 | ret = submit_bh(WRITE, bh); |
470decc6 | 175 | } |
818d276c GS |
176 | *cbh = bh; |
177 | return ret; | |
178 | } | |
179 | ||
180 | /* | |
181 | * This function along with journal_submit_commit_record | |
182 | * allows to write the commit record asynchronously. | |
183 | */ | |
184 | static int journal_wait_on_commit_record(struct buffer_head *bh) | |
185 | { | |
186 | int ret = 0; | |
187 | ||
188 | clear_buffer_dirty(bh); | |
189 | wait_on_buffer(bh); | |
470decc6 | 190 | |
818d276c GS |
191 | if (unlikely(!buffer_uptodate(bh))) |
192 | ret = -EIO; | |
193 | put_bh(bh); /* One for getblk() */ | |
194 | jbd2_journal_put_journal_head(bh2jh(bh)); | |
195 | ||
196 | return ret; | |
470decc6 DK |
197 | } |
198 | ||
818d276c GS |
199 | /* |
200 | * Wait for all submitted IO to complete. | |
201 | */ | |
202 | static int journal_wait_on_locked_list(journal_t *journal, | |
203 | transaction_t *commit_transaction) | |
204 | { | |
205 | int ret = 0; | |
206 | struct journal_head *jh; | |
207 | ||
208 | while (commit_transaction->t_locked_list) { | |
209 | struct buffer_head *bh; | |
210 | ||
211 | jh = commit_transaction->t_locked_list->b_tprev; | |
212 | bh = jh2bh(jh); | |
213 | get_bh(bh); | |
214 | if (buffer_locked(bh)) { | |
215 | spin_unlock(&journal->j_list_lock); | |
216 | wait_on_buffer(bh); | |
217 | if (unlikely(!buffer_uptodate(bh))) | |
218 | ret = -EIO; | |
219 | spin_lock(&journal->j_list_lock); | |
220 | } | |
221 | if (!inverted_lock(journal, bh)) { | |
222 | put_bh(bh); | |
223 | spin_lock(&journal->j_list_lock); | |
224 | continue; | |
225 | } | |
226 | if (buffer_jbd(bh) && jh->b_jlist == BJ_Locked) { | |
227 | __jbd2_journal_unfile_buffer(jh); | |
228 | jbd_unlock_bh_state(bh); | |
229 | jbd2_journal_remove_journal_head(bh); | |
230 | put_bh(bh); | |
231 | } else { | |
232 | jbd_unlock_bh_state(bh); | |
233 | } | |
234 | put_bh(bh); | |
235 | cond_resched_lock(&journal->j_list_lock); | |
236 | } | |
237 | return ret; | |
238 | } | |
239 | ||
470decc6 DK |
240 | static void journal_do_submit_data(struct buffer_head **wbuf, int bufs) |
241 | { | |
242 | int i; | |
243 | ||
244 | for (i = 0; i < bufs; i++) { | |
245 | wbuf[i]->b_end_io = end_buffer_write_sync; | |
246 | /* We use-up our safety reference in submit_bh() */ | |
247 | submit_bh(WRITE, wbuf[i]); | |
248 | } | |
249 | } | |
250 | ||
251 | /* | |
252 | * Submit all the data buffers to disk | |
253 | */ | |
254 | static void journal_submit_data_buffers(journal_t *journal, | |
255 | transaction_t *commit_transaction) | |
256 | { | |
257 | struct journal_head *jh; | |
258 | struct buffer_head *bh; | |
259 | int locked; | |
260 | int bufs = 0; | |
261 | struct buffer_head **wbuf = journal->j_wbuf; | |
262 | ||
263 | /* | |
264 | * Whenever we unlock the journal and sleep, things can get added | |
265 | * onto ->t_sync_datalist, so we have to keep looping back to | |
266 | * write_out_data until we *know* that the list is empty. | |
267 | * | |
268 | * Cleanup any flushed data buffers from the data list. Even in | |
269 | * abort mode, we want to flush this out as soon as possible. | |
270 | */ | |
271 | write_out_data: | |
272 | cond_resched(); | |
273 | spin_lock(&journal->j_list_lock); | |
274 | ||
275 | while (commit_transaction->t_sync_datalist) { | |
276 | jh = commit_transaction->t_sync_datalist; | |
277 | bh = jh2bh(jh); | |
278 | locked = 0; | |
279 | ||
280 | /* Get reference just to make sure buffer does not disappear | |
281 | * when we are forced to drop various locks */ | |
282 | get_bh(bh); | |
283 | /* If the buffer is dirty, we need to submit IO and hence | |
284 | * we need the buffer lock. We try to lock the buffer without | |
285 | * blocking. If we fail, we need to drop j_list_lock and do | |
286 | * blocking lock_buffer(). | |
287 | */ | |
288 | if (buffer_dirty(bh)) { | |
289 | if (test_set_buffer_locked(bh)) { | |
290 | BUFFER_TRACE(bh, "needs blocking lock"); | |
291 | spin_unlock(&journal->j_list_lock); | |
292 | /* Write out all data to prevent deadlocks */ | |
293 | journal_do_submit_data(wbuf, bufs); | |
294 | bufs = 0; | |
295 | lock_buffer(bh); | |
296 | spin_lock(&journal->j_list_lock); | |
297 | } | |
298 | locked = 1; | |
299 | } | |
300 | /* We have to get bh_state lock. Again out of order, sigh. */ | |
301 | if (!inverted_lock(journal, bh)) { | |
302 | jbd_lock_bh_state(bh); | |
303 | spin_lock(&journal->j_list_lock); | |
304 | } | |
305 | /* Someone already cleaned up the buffer? */ | |
306 | if (!buffer_jbd(bh) | |
307 | || jh->b_transaction != commit_transaction | |
308 | || jh->b_jlist != BJ_SyncData) { | |
309 | jbd_unlock_bh_state(bh); | |
310 | if (locked) | |
311 | unlock_buffer(bh); | |
312 | BUFFER_TRACE(bh, "already cleaned up"); | |
313 | put_bh(bh); | |
314 | continue; | |
315 | } | |
316 | if (locked && test_clear_buffer_dirty(bh)) { | |
317 | BUFFER_TRACE(bh, "needs writeout, adding to array"); | |
318 | wbuf[bufs++] = bh; | |
f7f4bccb | 319 | __jbd2_journal_file_buffer(jh, commit_transaction, |
470decc6 DK |
320 | BJ_Locked); |
321 | jbd_unlock_bh_state(bh); | |
322 | if (bufs == journal->j_wbufsize) { | |
323 | spin_unlock(&journal->j_list_lock); | |
324 | journal_do_submit_data(wbuf, bufs); | |
325 | bufs = 0; | |
326 | goto write_out_data; | |
327 | } | |
12603925 HH |
328 | } else if (!locked && buffer_locked(bh)) { |
329 | __jbd2_journal_file_buffer(jh, commit_transaction, | |
330 | BJ_Locked); | |
331 | jbd_unlock_bh_state(bh); | |
332 | put_bh(bh); | |
333 | } else { | |
470decc6 | 334 | BUFFER_TRACE(bh, "writeout complete: unfile"); |
f7f4bccb | 335 | __jbd2_journal_unfile_buffer(jh); |
470decc6 DK |
336 | jbd_unlock_bh_state(bh); |
337 | if (locked) | |
338 | unlock_buffer(bh); | |
f7f4bccb | 339 | jbd2_journal_remove_journal_head(bh); |
470decc6 | 340 | /* Once for our safety reference, once for |
f7f4bccb | 341 | * jbd2_journal_remove_journal_head() */ |
470decc6 DK |
342 | put_bh(bh); |
343 | put_bh(bh); | |
344 | } | |
345 | ||
95c354fe | 346 | if (need_resched() || spin_needbreak(&journal->j_list_lock)) { |
470decc6 DK |
347 | spin_unlock(&journal->j_list_lock); |
348 | goto write_out_data; | |
349 | } | |
350 | } | |
351 | spin_unlock(&journal->j_list_lock); | |
352 | journal_do_submit_data(wbuf, bufs); | |
353 | } | |
354 | ||
818d276c GS |
355 | static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh) |
356 | { | |
357 | struct page *page = bh->b_page; | |
358 | char *addr; | |
359 | __u32 checksum; | |
360 | ||
361 | addr = kmap_atomic(page, KM_USER0); | |
362 | checksum = crc32_be(crc32_sum, | |
363 | (void *)(addr + offset_in_page(bh->b_data)), bh->b_size); | |
364 | kunmap_atomic(addr, KM_USER0); | |
365 | ||
366 | return checksum; | |
367 | } | |
368 | ||
369 | static void write_tag_block(int tag_bytes, journal_block_tag_t *tag, | |
18eba7aa | 370 | unsigned long long block) |
b517bea1 ZB |
371 | { |
372 | tag->t_blocknr = cpu_to_be32(block & (u32)~0); | |
cd02ff0b | 373 | if (tag_bytes > JBD2_TAG_SIZE32) |
b517bea1 ZB |
374 | tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); |
375 | } | |
376 | ||
470decc6 | 377 | /* |
f7f4bccb | 378 | * jbd2_journal_commit_transaction |
470decc6 DK |
379 | * |
380 | * The primary function for committing a transaction to the log. This | |
381 | * function is called by the journal thread to begin a complete commit. | |
382 | */ | |
f7f4bccb | 383 | void jbd2_journal_commit_transaction(journal_t *journal) |
470decc6 | 384 | { |
8e85fb3f | 385 | struct transaction_stats_s stats; |
470decc6 DK |
386 | transaction_t *commit_transaction; |
387 | struct journal_head *jh, *new_jh, *descriptor; | |
388 | struct buffer_head **wbuf = journal->j_wbuf; | |
389 | int bufs; | |
390 | int flags; | |
391 | int err; | |
18eba7aa | 392 | unsigned long long blocknr; |
470decc6 DK |
393 | char *tagp = NULL; |
394 | journal_header_t *header; | |
395 | journal_block_tag_t *tag = NULL; | |
396 | int space_left = 0; | |
397 | int first_tag = 0; | |
398 | int tag_flag; | |
399 | int i; | |
b517bea1 | 400 | int tag_bytes = journal_tag_bytes(journal); |
818d276c GS |
401 | struct buffer_head *cbh = NULL; /* For transactional checksums */ |
402 | __u32 crc32_sum = ~0; | |
470decc6 DK |
403 | |
404 | /* | |
405 | * First job: lock down the current transaction and wait for | |
406 | * all outstanding updates to complete. | |
407 | */ | |
408 | ||
409 | #ifdef COMMIT_STATS | |
410 | spin_lock(&journal->j_list_lock); | |
411 | summarise_journal_usage(journal); | |
412 | spin_unlock(&journal->j_list_lock); | |
413 | #endif | |
414 | ||
f7f4bccb MC |
415 | /* Do we need to erase the effects of a prior jbd2_journal_flush? */ |
416 | if (journal->j_flags & JBD2_FLUSHED) { | |
470decc6 | 417 | jbd_debug(3, "super block updated\n"); |
f7f4bccb | 418 | jbd2_journal_update_superblock(journal, 1); |
470decc6 DK |
419 | } else { |
420 | jbd_debug(3, "superblock not updated\n"); | |
421 | } | |
422 | ||
423 | J_ASSERT(journal->j_running_transaction != NULL); | |
424 | J_ASSERT(journal->j_committing_transaction == NULL); | |
425 | ||
426 | commit_transaction = journal->j_running_transaction; | |
427 | J_ASSERT(commit_transaction->t_state == T_RUNNING); | |
428 | ||
429 | jbd_debug(1, "JBD: starting commit of transaction %d\n", | |
430 | commit_transaction->t_tid); | |
431 | ||
432 | spin_lock(&journal->j_state_lock); | |
433 | commit_transaction->t_state = T_LOCKED; | |
434 | ||
8e85fb3f JL |
435 | stats.u.run.rs_wait = commit_transaction->t_max_wait; |
436 | stats.u.run.rs_locked = jiffies; | |
437 | stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, | |
438 | stats.u.run.rs_locked); | |
439 | ||
470decc6 DK |
440 | spin_lock(&commit_transaction->t_handle_lock); |
441 | while (commit_transaction->t_updates) { | |
442 | DEFINE_WAIT(wait); | |
443 | ||
444 | prepare_to_wait(&journal->j_wait_updates, &wait, | |
445 | TASK_UNINTERRUPTIBLE); | |
446 | if (commit_transaction->t_updates) { | |
447 | spin_unlock(&commit_transaction->t_handle_lock); | |
448 | spin_unlock(&journal->j_state_lock); | |
449 | schedule(); | |
450 | spin_lock(&journal->j_state_lock); | |
451 | spin_lock(&commit_transaction->t_handle_lock); | |
452 | } | |
453 | finish_wait(&journal->j_wait_updates, &wait); | |
454 | } | |
455 | spin_unlock(&commit_transaction->t_handle_lock); | |
456 | ||
457 | J_ASSERT (commit_transaction->t_outstanding_credits <= | |
458 | journal->j_max_transaction_buffers); | |
459 | ||
460 | /* | |
461 | * First thing we are allowed to do is to discard any remaining | |
462 | * BJ_Reserved buffers. Note, it is _not_ permissible to assume | |
463 | * that there are no such buffers: if a large filesystem | |
464 | * operation like a truncate needs to split itself over multiple | |
f7f4bccb | 465 | * transactions, then it may try to do a jbd2_journal_restart() while |
470decc6 DK |
466 | * there are still BJ_Reserved buffers outstanding. These must |
467 | * be released cleanly from the current transaction. | |
468 | * | |
469 | * In this case, the filesystem must still reserve write access | |
470 | * again before modifying the buffer in the new transaction, but | |
471 | * we do not require it to remember exactly which old buffers it | |
472 | * has reserved. This is consistent with the existing behaviour | |
f7f4bccb | 473 | * that multiple jbd2_journal_get_write_access() calls to the same |
470decc6 DK |
474 | * buffer are perfectly permissable. |
475 | */ | |
476 | while (commit_transaction->t_reserved_list) { | |
477 | jh = commit_transaction->t_reserved_list; | |
478 | JBUFFER_TRACE(jh, "reserved, unused: refile"); | |
479 | /* | |
f7f4bccb | 480 | * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may |
470decc6 DK |
481 | * leave undo-committed data. |
482 | */ | |
483 | if (jh->b_committed_data) { | |
484 | struct buffer_head *bh = jh2bh(jh); | |
485 | ||
486 | jbd_lock_bh_state(bh); | |
af1e76d6 | 487 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
488 | jh->b_committed_data = NULL; |
489 | jbd_unlock_bh_state(bh); | |
490 | } | |
f7f4bccb | 491 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
492 | } |
493 | ||
494 | /* | |
495 | * Now try to drop any written-back buffers from the journal's | |
496 | * checkpoint lists. We do this *before* commit because it potentially | |
497 | * frees some memory | |
498 | */ | |
499 | spin_lock(&journal->j_list_lock); | |
f7f4bccb | 500 | __jbd2_journal_clean_checkpoint_list(journal); |
470decc6 DK |
501 | spin_unlock(&journal->j_list_lock); |
502 | ||
503 | jbd_debug (3, "JBD: commit phase 1\n"); | |
504 | ||
505 | /* | |
506 | * Switch to a new revoke table. | |
507 | */ | |
f7f4bccb | 508 | jbd2_journal_switch_revoke_table(journal); |
470decc6 | 509 | |
8e85fb3f JL |
510 | stats.u.run.rs_flushing = jiffies; |
511 | stats.u.run.rs_locked = jbd2_time_diff(stats.u.run.rs_locked, | |
512 | stats.u.run.rs_flushing); | |
513 | ||
470decc6 DK |
514 | commit_transaction->t_state = T_FLUSH; |
515 | journal->j_committing_transaction = commit_transaction; | |
516 | journal->j_running_transaction = NULL; | |
517 | commit_transaction->t_log_start = journal->j_head; | |
518 | wake_up(&journal->j_wait_transaction_locked); | |
519 | spin_unlock(&journal->j_state_lock); | |
520 | ||
521 | jbd_debug (3, "JBD: commit phase 2\n"); | |
522 | ||
470decc6 DK |
523 | /* |
524 | * Now start flushing things to disk, in the order they appear | |
525 | * on the transaction lists. Data blocks go first. | |
526 | */ | |
527 | err = 0; | |
528 | journal_submit_data_buffers(journal, commit_transaction); | |
529 | ||
530 | /* | |
818d276c GS |
531 | * Wait for all previously submitted IO to complete if commit |
532 | * record is to be written synchronously. | |
470decc6 DK |
533 | */ |
534 | spin_lock(&journal->j_list_lock); | |
818d276c GS |
535 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
536 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) | |
537 | err = journal_wait_on_locked_list(journal, | |
538 | commit_transaction); | |
470decc6 | 539 | |
470decc6 DK |
540 | spin_unlock(&journal->j_list_lock); |
541 | ||
542 | if (err) | |
a7fa2baf | 543 | jbd2_journal_abort(journal, err); |
470decc6 | 544 | |
f7f4bccb | 545 | jbd2_journal_write_revoke_records(journal, commit_transaction); |
470decc6 DK |
546 | |
547 | jbd_debug(3, "JBD: commit phase 2\n"); | |
548 | ||
549 | /* | |
550 | * If we found any dirty or locked buffers, then we should have | |
551 | * looped back up to the write_out_data label. If there weren't | |
552 | * any then journal_clean_data_list should have wiped the list | |
553 | * clean by now, so check that it is in fact empty. | |
554 | */ | |
555 | J_ASSERT (commit_transaction->t_sync_datalist == NULL); | |
556 | ||
557 | jbd_debug (3, "JBD: commit phase 3\n"); | |
558 | ||
559 | /* | |
560 | * Way to go: we have now written out all of the data for a | |
561 | * transaction! Now comes the tricky part: we need to write out | |
562 | * metadata. Loop over the transaction's entire buffer list: | |
563 | */ | |
02c471cb | 564 | spin_lock(&journal->j_state_lock); |
470decc6 | 565 | commit_transaction->t_state = T_COMMIT; |
02c471cb | 566 | spin_unlock(&journal->j_state_lock); |
470decc6 | 567 | |
8e85fb3f JL |
568 | stats.u.run.rs_logging = jiffies; |
569 | stats.u.run.rs_flushing = jbd2_time_diff(stats.u.run.rs_flushing, | |
570 | stats.u.run.rs_logging); | |
571 | stats.u.run.rs_blocks = commit_transaction->t_outstanding_credits; | |
572 | stats.u.run.rs_blocks_logged = 0; | |
573 | ||
1dfc3220 JB |
574 | J_ASSERT(commit_transaction->t_nr_buffers <= |
575 | commit_transaction->t_outstanding_credits); | |
576 | ||
470decc6 DK |
577 | descriptor = NULL; |
578 | bufs = 0; | |
579 | while (commit_transaction->t_buffers) { | |
580 | ||
581 | /* Find the next buffer to be journaled... */ | |
582 | ||
583 | jh = commit_transaction->t_buffers; | |
584 | ||
585 | /* If we're in abort mode, we just un-journal the buffer and | |
586 | release it for background writing. */ | |
587 | ||
588 | if (is_journal_aborted(journal)) { | |
589 | JBUFFER_TRACE(jh, "journal is aborting: refile"); | |
f7f4bccb | 590 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
591 | /* If that was the last one, we need to clean up |
592 | * any descriptor buffers which may have been | |
593 | * already allocated, even if we are now | |
594 | * aborting. */ | |
595 | if (!commit_transaction->t_buffers) | |
596 | goto start_journal_io; | |
597 | continue; | |
598 | } | |
599 | ||
600 | /* Make sure we have a descriptor block in which to | |
601 | record the metadata buffer. */ | |
602 | ||
603 | if (!descriptor) { | |
604 | struct buffer_head *bh; | |
605 | ||
606 | J_ASSERT (bufs == 0); | |
607 | ||
608 | jbd_debug(4, "JBD: get descriptor\n"); | |
609 | ||
f7f4bccb | 610 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 | 611 | if (!descriptor) { |
a7fa2baf | 612 | jbd2_journal_abort(journal, -EIO); |
470decc6 DK |
613 | continue; |
614 | } | |
615 | ||
616 | bh = jh2bh(descriptor); | |
617 | jbd_debug(4, "JBD: got buffer %llu (%p)\n", | |
618 | (unsigned long long)bh->b_blocknr, bh->b_data); | |
619 | header = (journal_header_t *)&bh->b_data[0]; | |
f7f4bccb MC |
620 | header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
621 | header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); | |
470decc6 DK |
622 | header->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
623 | ||
624 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
625 | space_left = bh->b_size - sizeof(journal_header_t); | |
626 | first_tag = 1; | |
627 | set_buffer_jwrite(bh); | |
628 | set_buffer_dirty(bh); | |
629 | wbuf[bufs++] = bh; | |
630 | ||
631 | /* Record it so that we can wait for IO | |
632 | completion later */ | |
633 | BUFFER_TRACE(bh, "ph3: file as descriptor"); | |
f7f4bccb | 634 | jbd2_journal_file_buffer(descriptor, commit_transaction, |
470decc6 DK |
635 | BJ_LogCtl); |
636 | } | |
637 | ||
638 | /* Where is the buffer to be written? */ | |
639 | ||
f7f4bccb | 640 | err = jbd2_journal_next_log_block(journal, &blocknr); |
470decc6 DK |
641 | /* If the block mapping failed, just abandon the buffer |
642 | and repeat this loop: we'll fall into the | |
643 | refile-on-abort condition above. */ | |
644 | if (err) { | |
a7fa2baf | 645 | jbd2_journal_abort(journal, err); |
470decc6 DK |
646 | continue; |
647 | } | |
648 | ||
649 | /* | |
650 | * start_this_handle() uses t_outstanding_credits to determine | |
651 | * the free space in the log, but this counter is changed | |
f7f4bccb | 652 | * by jbd2_journal_next_log_block() also. |
470decc6 DK |
653 | */ |
654 | commit_transaction->t_outstanding_credits--; | |
655 | ||
656 | /* Bump b_count to prevent truncate from stumbling over | |
657 | the shadowed buffer! @@@ This can go if we ever get | |
658 | rid of the BJ_IO/BJ_Shadow pairing of buffers. */ | |
659 | atomic_inc(&jh2bh(jh)->b_count); | |
660 | ||
661 | /* Make a temporary IO buffer with which to write it out | |
662 | (this will requeue both the metadata buffer and the | |
663 | temporary IO buffer). new_bh goes on BJ_IO*/ | |
664 | ||
665 | set_bit(BH_JWrite, &jh2bh(jh)->b_state); | |
666 | /* | |
f7f4bccb | 667 | * akpm: jbd2_journal_write_metadata_buffer() sets |
470decc6 DK |
668 | * new_bh->b_transaction to commit_transaction. |
669 | * We need to clean this up before we release new_bh | |
670 | * (which is of type BJ_IO) | |
671 | */ | |
672 | JBUFFER_TRACE(jh, "ph3: write metadata"); | |
f7f4bccb | 673 | flags = jbd2_journal_write_metadata_buffer(commit_transaction, |
470decc6 DK |
674 | jh, &new_jh, blocknr); |
675 | set_bit(BH_JWrite, &jh2bh(new_jh)->b_state); | |
676 | wbuf[bufs++] = jh2bh(new_jh); | |
677 | ||
678 | /* Record the new block's tag in the current descriptor | |
679 | buffer */ | |
680 | ||
681 | tag_flag = 0; | |
682 | if (flags & 1) | |
f7f4bccb | 683 | tag_flag |= JBD2_FLAG_ESCAPE; |
470decc6 | 684 | if (!first_tag) |
f7f4bccb | 685 | tag_flag |= JBD2_FLAG_SAME_UUID; |
470decc6 DK |
686 | |
687 | tag = (journal_block_tag_t *) tagp; | |
b517bea1 | 688 | write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr); |
470decc6 | 689 | tag->t_flags = cpu_to_be32(tag_flag); |
b517bea1 ZB |
690 | tagp += tag_bytes; |
691 | space_left -= tag_bytes; | |
470decc6 DK |
692 | |
693 | if (first_tag) { | |
694 | memcpy (tagp, journal->j_uuid, 16); | |
695 | tagp += 16; | |
696 | space_left -= 16; | |
697 | first_tag = 0; | |
698 | } | |
699 | ||
700 | /* If there's no more to do, or if the descriptor is full, | |
701 | let the IO rip! */ | |
702 | ||
703 | if (bufs == journal->j_wbufsize || | |
704 | commit_transaction->t_buffers == NULL || | |
b517bea1 | 705 | space_left < tag_bytes + 16) { |
470decc6 DK |
706 | |
707 | jbd_debug(4, "JBD: Submit %d IOs\n", bufs); | |
708 | ||
709 | /* Write an end-of-descriptor marker before | |
710 | submitting the IOs. "tag" still points to | |
711 | the last tag we set up. */ | |
712 | ||
f7f4bccb | 713 | tag->t_flags |= cpu_to_be32(JBD2_FLAG_LAST_TAG); |
470decc6 DK |
714 | |
715 | start_journal_io: | |
716 | for (i = 0; i < bufs; i++) { | |
717 | struct buffer_head *bh = wbuf[i]; | |
818d276c GS |
718 | /* |
719 | * Compute checksum. | |
720 | */ | |
721 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
722 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
723 | crc32_sum = | |
724 | jbd2_checksum_data(crc32_sum, bh); | |
725 | } | |
726 | ||
470decc6 DK |
727 | lock_buffer(bh); |
728 | clear_buffer_dirty(bh); | |
729 | set_buffer_uptodate(bh); | |
730 | bh->b_end_io = journal_end_buffer_io_sync; | |
731 | submit_bh(WRITE, bh); | |
732 | } | |
733 | cond_resched(); | |
8e85fb3f | 734 | stats.u.run.rs_blocks_logged += bufs; |
470decc6 DK |
735 | |
736 | /* Force a new descriptor to be generated next | |
737 | time round the loop. */ | |
738 | descriptor = NULL; | |
739 | bufs = 0; | |
740 | } | |
741 | } | |
742 | ||
818d276c GS |
743 | /* Done it all: now write the commit record asynchronously. */ |
744 | ||
745 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, | |
746 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
747 | err = journal_submit_commit_record(journal, commit_transaction, | |
748 | &cbh, crc32_sum); | |
749 | if (err) | |
750 | __jbd2_journal_abort_hard(journal); | |
751 | ||
752 | spin_lock(&journal->j_list_lock); | |
753 | err = journal_wait_on_locked_list(journal, | |
754 | commit_transaction); | |
755 | spin_unlock(&journal->j_list_lock); | |
756 | if (err) | |
757 | __jbd2_journal_abort_hard(journal); | |
758 | } | |
759 | ||
470decc6 DK |
760 | /* Lo and behold: we have just managed to send a transaction to |
761 | the log. Before we can commit it, wait for the IO so far to | |
762 | complete. Control buffers being written are on the | |
763 | transaction's t_log_list queue, and metadata buffers are on | |
764 | the t_iobuf_list queue. | |
765 | ||
766 | Wait for the buffers in reverse order. That way we are | |
767 | less likely to be woken up until all IOs have completed, and | |
768 | so we incur less scheduling load. | |
769 | */ | |
770 | ||
771 | jbd_debug(3, "JBD: commit phase 4\n"); | |
772 | ||
773 | /* | |
774 | * akpm: these are BJ_IO, and j_list_lock is not needed. | |
775 | * See __journal_try_to_free_buffer. | |
776 | */ | |
777 | wait_for_iobuf: | |
778 | while (commit_transaction->t_iobuf_list != NULL) { | |
779 | struct buffer_head *bh; | |
780 | ||
781 | jh = commit_transaction->t_iobuf_list->b_tprev; | |
782 | bh = jh2bh(jh); | |
783 | if (buffer_locked(bh)) { | |
784 | wait_on_buffer(bh); | |
785 | goto wait_for_iobuf; | |
786 | } | |
787 | if (cond_resched()) | |
788 | goto wait_for_iobuf; | |
789 | ||
790 | if (unlikely(!buffer_uptodate(bh))) | |
791 | err = -EIO; | |
792 | ||
793 | clear_buffer_jwrite(bh); | |
794 | ||
795 | JBUFFER_TRACE(jh, "ph4: unfile after journal write"); | |
f7f4bccb | 796 | jbd2_journal_unfile_buffer(journal, jh); |
470decc6 DK |
797 | |
798 | /* | |
799 | * ->t_iobuf_list should contain only dummy buffer_heads | |
f7f4bccb | 800 | * which were created by jbd2_journal_write_metadata_buffer(). |
470decc6 DK |
801 | */ |
802 | BUFFER_TRACE(bh, "dumping temporary bh"); | |
f7f4bccb | 803 | jbd2_journal_put_journal_head(jh); |
470decc6 DK |
804 | __brelse(bh); |
805 | J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0); | |
806 | free_buffer_head(bh); | |
807 | ||
808 | /* We also have to unlock and free the corresponding | |
809 | shadowed buffer */ | |
810 | jh = commit_transaction->t_shadow_list->b_tprev; | |
811 | bh = jh2bh(jh); | |
812 | clear_bit(BH_JWrite, &bh->b_state); | |
813 | J_ASSERT_BH(bh, buffer_jbddirty(bh)); | |
814 | ||
815 | /* The metadata is now released for reuse, but we need | |
816 | to remember it against this transaction so that when | |
817 | we finally commit, we can do any checkpointing | |
818 | required. */ | |
819 | JBUFFER_TRACE(jh, "file as BJ_Forget"); | |
f7f4bccb | 820 | jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget); |
470decc6 DK |
821 | /* Wake up any transactions which were waiting for this |
822 | IO to complete */ | |
823 | wake_up_bit(&bh->b_state, BH_Unshadow); | |
824 | JBUFFER_TRACE(jh, "brelse shadowed buffer"); | |
825 | __brelse(bh); | |
826 | } | |
827 | ||
828 | J_ASSERT (commit_transaction->t_shadow_list == NULL); | |
829 | ||
830 | jbd_debug(3, "JBD: commit phase 5\n"); | |
831 | ||
832 | /* Here we wait for the revoke record and descriptor record buffers */ | |
833 | wait_for_ctlbuf: | |
834 | while (commit_transaction->t_log_list != NULL) { | |
835 | struct buffer_head *bh; | |
836 | ||
837 | jh = commit_transaction->t_log_list->b_tprev; | |
838 | bh = jh2bh(jh); | |
839 | if (buffer_locked(bh)) { | |
840 | wait_on_buffer(bh); | |
841 | goto wait_for_ctlbuf; | |
842 | } | |
843 | if (cond_resched()) | |
844 | goto wait_for_ctlbuf; | |
845 | ||
846 | if (unlikely(!buffer_uptodate(bh))) | |
847 | err = -EIO; | |
848 | ||
849 | BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile"); | |
850 | clear_buffer_jwrite(bh); | |
f7f4bccb MC |
851 | jbd2_journal_unfile_buffer(journal, jh); |
852 | jbd2_journal_put_journal_head(jh); | |
470decc6 DK |
853 | __brelse(bh); /* One for getblk */ |
854 | /* AKPM: bforget here */ | |
855 | } | |
856 | ||
857 | jbd_debug(3, "JBD: commit phase 6\n"); | |
858 | ||
818d276c GS |
859 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
860 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
861 | err = journal_submit_commit_record(journal, commit_transaction, | |
862 | &cbh, crc32_sum); | |
863 | if (err) | |
864 | __jbd2_journal_abort_hard(journal); | |
865 | } | |
b048d846 MC |
866 | if (!err && !is_journal_aborted(journal)) |
867 | err = journal_wait_on_commit_record(cbh); | |
470decc6 DK |
868 | |
869 | if (err) | |
a7fa2baf | 870 | jbd2_journal_abort(journal, err); |
470decc6 DK |
871 | |
872 | /* End of a transaction! Finally, we can do checkpoint | |
873 | processing: any buffers committed as a result of this | |
874 | transaction can be removed from any checkpoint list it was on | |
875 | before. */ | |
876 | ||
877 | jbd_debug(3, "JBD: commit phase 7\n"); | |
878 | ||
879 | J_ASSERT(commit_transaction->t_sync_datalist == NULL); | |
880 | J_ASSERT(commit_transaction->t_buffers == NULL); | |
881 | J_ASSERT(commit_transaction->t_checkpoint_list == NULL); | |
882 | J_ASSERT(commit_transaction->t_iobuf_list == NULL); | |
883 | J_ASSERT(commit_transaction->t_shadow_list == NULL); | |
884 | J_ASSERT(commit_transaction->t_log_list == NULL); | |
885 | ||
886 | restart_loop: | |
887 | /* | |
888 | * As there are other places (journal_unmap_buffer()) adding buffers | |
889 | * to this list we have to be careful and hold the j_list_lock. | |
890 | */ | |
891 | spin_lock(&journal->j_list_lock); | |
892 | while (commit_transaction->t_forget) { | |
893 | transaction_t *cp_transaction; | |
894 | struct buffer_head *bh; | |
895 | ||
896 | jh = commit_transaction->t_forget; | |
897 | spin_unlock(&journal->j_list_lock); | |
898 | bh = jh2bh(jh); | |
899 | jbd_lock_bh_state(bh); | |
900 | J_ASSERT_JH(jh, jh->b_transaction == commit_transaction || | |
901 | jh->b_transaction == journal->j_running_transaction); | |
902 | ||
903 | /* | |
904 | * If there is undo-protected committed data against | |
905 | * this buffer, then we can remove it now. If it is a | |
906 | * buffer needing such protection, the old frozen_data | |
907 | * field now points to a committed version of the | |
908 | * buffer, so rotate that field to the new committed | |
909 | * data. | |
910 | * | |
911 | * Otherwise, we can just throw away the frozen data now. | |
912 | */ | |
913 | if (jh->b_committed_data) { | |
af1e76d6 | 914 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
915 | jh->b_committed_data = NULL; |
916 | if (jh->b_frozen_data) { | |
917 | jh->b_committed_data = jh->b_frozen_data; | |
918 | jh->b_frozen_data = NULL; | |
919 | } | |
920 | } else if (jh->b_frozen_data) { | |
af1e76d6 | 921 | jbd2_free(jh->b_frozen_data, bh->b_size); |
470decc6 DK |
922 | jh->b_frozen_data = NULL; |
923 | } | |
924 | ||
925 | spin_lock(&journal->j_list_lock); | |
926 | cp_transaction = jh->b_cp_transaction; | |
927 | if (cp_transaction) { | |
928 | JBUFFER_TRACE(jh, "remove from old cp transaction"); | |
8e85fb3f | 929 | cp_transaction->t_chp_stats.cs_dropped++; |
f7f4bccb | 930 | __jbd2_journal_remove_checkpoint(jh); |
470decc6 DK |
931 | } |
932 | ||
933 | /* Only re-checkpoint the buffer_head if it is marked | |
934 | * dirty. If the buffer was added to the BJ_Forget list | |
f7f4bccb | 935 | * by jbd2_journal_forget, it may no longer be dirty and |
470decc6 DK |
936 | * there's no point in keeping a checkpoint record for |
937 | * it. */ | |
938 | ||
939 | /* A buffer which has been freed while still being | |
940 | * journaled by a previous transaction may end up still | |
941 | * being dirty here, but we want to avoid writing back | |
942 | * that buffer in the future now that the last use has | |
943 | * been committed. That's not only a performance gain, | |
944 | * it also stops aliasing problems if the buffer is left | |
945 | * behind for writeback and gets reallocated for another | |
946 | * use in a different page. */ | |
947 | if (buffer_freed(bh)) { | |
948 | clear_buffer_freed(bh); | |
949 | clear_buffer_jbddirty(bh); | |
950 | } | |
951 | ||
952 | if (buffer_jbddirty(bh)) { | |
953 | JBUFFER_TRACE(jh, "add to new checkpointing trans"); | |
f7f4bccb | 954 | __jbd2_journal_insert_checkpoint(jh, commit_transaction); |
470decc6 | 955 | JBUFFER_TRACE(jh, "refile for checkpoint writeback"); |
f7f4bccb | 956 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
957 | jbd_unlock_bh_state(bh); |
958 | } else { | |
959 | J_ASSERT_BH(bh, !buffer_dirty(bh)); | |
960 | /* The buffer on BJ_Forget list and not jbddirty means | |
961 | * it has been freed by this transaction and hence it | |
962 | * could not have been reallocated until this | |
963 | * transaction has committed. *BUT* it could be | |
964 | * reallocated once we have written all the data to | |
965 | * disk and before we process the buffer on BJ_Forget | |
966 | * list. */ | |
967 | JBUFFER_TRACE(jh, "refile or unfile freed buffer"); | |
f7f4bccb | 968 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
969 | if (!jh->b_transaction) { |
970 | jbd_unlock_bh_state(bh); | |
971 | /* needs a brelse */ | |
f7f4bccb | 972 | jbd2_journal_remove_journal_head(bh); |
470decc6 DK |
973 | release_buffer_page(bh); |
974 | } else | |
975 | jbd_unlock_bh_state(bh); | |
976 | } | |
977 | cond_resched_lock(&journal->j_list_lock); | |
978 | } | |
979 | spin_unlock(&journal->j_list_lock); | |
980 | /* | |
f5a7a6b0 JK |
981 | * This is a bit sleazy. We use j_list_lock to protect transition |
982 | * of a transaction into T_FINISHED state and calling | |
983 | * __jbd2_journal_drop_transaction(). Otherwise we could race with | |
984 | * other checkpointing code processing the transaction... | |
470decc6 DK |
985 | */ |
986 | spin_lock(&journal->j_state_lock); | |
987 | spin_lock(&journal->j_list_lock); | |
988 | /* | |
989 | * Now recheck if some buffers did not get attached to the transaction | |
990 | * while the lock was dropped... | |
991 | */ | |
992 | if (commit_transaction->t_forget) { | |
993 | spin_unlock(&journal->j_list_lock); | |
994 | spin_unlock(&journal->j_state_lock); | |
995 | goto restart_loop; | |
996 | } | |
997 | ||
998 | /* Done with this transaction! */ | |
999 | ||
1000 | jbd_debug(3, "JBD: commit phase 8\n"); | |
1001 | ||
1002 | J_ASSERT(commit_transaction->t_state == T_COMMIT); | |
1003 | ||
8e85fb3f JL |
1004 | commit_transaction->t_start = jiffies; |
1005 | stats.u.run.rs_logging = jbd2_time_diff(stats.u.run.rs_logging, | |
1006 | commit_transaction->t_start); | |
1007 | ||
1008 | /* | |
1009 | * File the transaction for history | |
1010 | */ | |
1011 | stats.ts_type = JBD2_STATS_RUN; | |
1012 | stats.ts_tid = commit_transaction->t_tid; | |
1013 | stats.u.run.rs_handle_count = commit_transaction->t_handle_count; | |
1014 | spin_lock(&journal->j_history_lock); | |
1015 | memcpy(journal->j_history + journal->j_history_cur, &stats, | |
1016 | sizeof(stats)); | |
1017 | if (++journal->j_history_cur == journal->j_history_max) | |
1018 | journal->j_history_cur = 0; | |
1019 | ||
1020 | /* | |
1021 | * Calculate overall stats | |
1022 | */ | |
1023 | journal->j_stats.ts_tid++; | |
1024 | journal->j_stats.u.run.rs_wait += stats.u.run.rs_wait; | |
1025 | journal->j_stats.u.run.rs_running += stats.u.run.rs_running; | |
1026 | journal->j_stats.u.run.rs_locked += stats.u.run.rs_locked; | |
1027 | journal->j_stats.u.run.rs_flushing += stats.u.run.rs_flushing; | |
1028 | journal->j_stats.u.run.rs_logging += stats.u.run.rs_logging; | |
1029 | journal->j_stats.u.run.rs_handle_count += stats.u.run.rs_handle_count; | |
1030 | journal->j_stats.u.run.rs_blocks += stats.u.run.rs_blocks; | |
1031 | journal->j_stats.u.run.rs_blocks_logged += stats.u.run.rs_blocks_logged; | |
1032 | spin_unlock(&journal->j_history_lock); | |
1033 | ||
470decc6 DK |
1034 | commit_transaction->t_state = T_FINISHED; |
1035 | J_ASSERT(commit_transaction == journal->j_committing_transaction); | |
1036 | journal->j_commit_sequence = commit_transaction->t_tid; | |
1037 | journal->j_committing_transaction = NULL; | |
1038 | spin_unlock(&journal->j_state_lock); | |
1039 | ||
f89b7795 JK |
1040 | if (commit_transaction->t_checkpoint_list == NULL && |
1041 | commit_transaction->t_checkpoint_io_list == NULL) { | |
f7f4bccb | 1042 | __jbd2_journal_drop_transaction(journal, commit_transaction); |
470decc6 DK |
1043 | } else { |
1044 | if (journal->j_checkpoint_transactions == NULL) { | |
1045 | journal->j_checkpoint_transactions = commit_transaction; | |
1046 | commit_transaction->t_cpnext = commit_transaction; | |
1047 | commit_transaction->t_cpprev = commit_transaction; | |
1048 | } else { | |
1049 | commit_transaction->t_cpnext = | |
1050 | journal->j_checkpoint_transactions; | |
1051 | commit_transaction->t_cpprev = | |
1052 | commit_transaction->t_cpnext->t_cpprev; | |
1053 | commit_transaction->t_cpnext->t_cpprev = | |
1054 | commit_transaction; | |
1055 | commit_transaction->t_cpprev->t_cpnext = | |
1056 | commit_transaction; | |
1057 | } | |
1058 | } | |
1059 | spin_unlock(&journal->j_list_lock); | |
1060 | ||
1061 | jbd_debug(1, "JBD: commit %d complete, head %d\n", | |
1062 | journal->j_commit_sequence, journal->j_tail_sequence); | |
1063 | ||
1064 | wake_up(&journal->j_wait_done_commit); | |
1065 | } |