Commit | Line | Data |
---|---|---|
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 | 114 | int barrier_done = 0; |
736603ab | 115 | struct timespec now = current_kernel_time(); |
470decc6 DK |
116 | |
117 | if (is_journal_aborted(journal)) | |
118 | return 0; | |
119 | ||
f7f4bccb | 120 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 DK |
121 | if (!descriptor) |
122 | return 1; | |
123 | ||
124 | bh = jh2bh(descriptor); | |
125 | ||
818d276c GS |
126 | tmp = (struct commit_header *)bh->b_data; |
127 | tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); | |
128 | tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); | |
129 | tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); | |
736603ab TT |
130 | tmp->h_commit_sec = cpu_to_be64(now.tv_sec); |
131 | tmp->h_commit_nsec = cpu_to_be32(now.tv_nsec); | |
818d276c GS |
132 | |
133 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
134 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
135 | tmp->h_chksum_type = JBD2_CRC32_CHKSUM; | |
136 | tmp->h_chksum_size = JBD2_CRC32_CHKSUM_SIZE; | |
137 | tmp->h_chksum[0] = cpu_to_be32(crc32_sum); | |
470decc6 DK |
138 | } |
139 | ||
818d276c GS |
140 | JBUFFER_TRACE(descriptor, "submit commit block"); |
141 | lock_buffer(bh); | |
c4b8e635 | 142 | get_bh(bh); |
470decc6 | 143 | set_buffer_dirty(bh); |
818d276c GS |
144 | set_buffer_uptodate(bh); |
145 | bh->b_end_io = journal_end_buffer_io_sync; | |
146 | ||
147 | if (journal->j_flags & JBD2_BARRIER && | |
4d605179 | 148 | !JBD2_HAS_INCOMPAT_FEATURE(journal, |
818d276c | 149 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
470decc6 DK |
150 | set_buffer_ordered(bh); |
151 | barrier_done = 1; | |
152 | } | |
818d276c | 153 | ret = submit_bh(WRITE, bh); |
c4e35e07 DK |
154 | if (barrier_done) |
155 | clear_buffer_ordered(bh); | |
818d276c | 156 | |
470decc6 DK |
157 | /* is it possible for another commit to fail at roughly |
158 | * the same time as this one? If so, we don't want to | |
159 | * trust the barrier flag in the super, but instead want | |
160 | * to remember if we sent a barrier request | |
161 | */ | |
162 | if (ret == -EOPNOTSUPP && barrier_done) { | |
163 | char b[BDEVNAME_SIZE]; | |
164 | ||
165 | printk(KERN_WARNING | |
166 | "JBD: barrier-based sync failed on %s - " | |
167 | "disabling barriers\n", | |
168 | bdevname(journal->j_dev, b)); | |
169 | spin_lock(&journal->j_state_lock); | |
f7f4bccb | 170 | journal->j_flags &= ~JBD2_BARRIER; |
470decc6 DK |
171 | spin_unlock(&journal->j_state_lock); |
172 | ||
173 | /* And try again, without the barrier */ | |
034772b0 | 174 | lock_buffer(bh); |
470decc6 DK |
175 | set_buffer_uptodate(bh); |
176 | set_buffer_dirty(bh); | |
818d276c | 177 | ret = submit_bh(WRITE, bh); |
470decc6 | 178 | } |
818d276c GS |
179 | *cbh = bh; |
180 | return ret; | |
181 | } | |
182 | ||
183 | /* | |
184 | * This function along with journal_submit_commit_record | |
185 | * allows to write the commit record asynchronously. | |
186 | */ | |
187 | static int journal_wait_on_commit_record(struct buffer_head *bh) | |
188 | { | |
189 | int ret = 0; | |
190 | ||
191 | clear_buffer_dirty(bh); | |
192 | wait_on_buffer(bh); | |
470decc6 | 193 | |
818d276c GS |
194 | if (unlikely(!buffer_uptodate(bh))) |
195 | ret = -EIO; | |
196 | put_bh(bh); /* One for getblk() */ | |
197 | jbd2_journal_put_journal_head(bh2jh(bh)); | |
198 | ||
199 | return ret; | |
470decc6 DK |
200 | } |
201 | ||
818d276c GS |
202 | /* |
203 | * Wait for all submitted IO to complete. | |
204 | */ | |
205 | static int journal_wait_on_locked_list(journal_t *journal, | |
206 | transaction_t *commit_transaction) | |
207 | { | |
208 | int ret = 0; | |
209 | struct journal_head *jh; | |
210 | ||
211 | while (commit_transaction->t_locked_list) { | |
212 | struct buffer_head *bh; | |
213 | ||
214 | jh = commit_transaction->t_locked_list->b_tprev; | |
215 | bh = jh2bh(jh); | |
216 | get_bh(bh); | |
217 | if (buffer_locked(bh)) { | |
218 | spin_unlock(&journal->j_list_lock); | |
219 | wait_on_buffer(bh); | |
220 | if (unlikely(!buffer_uptodate(bh))) | |
221 | ret = -EIO; | |
222 | spin_lock(&journal->j_list_lock); | |
223 | } | |
224 | if (!inverted_lock(journal, bh)) { | |
225 | put_bh(bh); | |
226 | spin_lock(&journal->j_list_lock); | |
227 | continue; | |
228 | } | |
229 | if (buffer_jbd(bh) && jh->b_jlist == BJ_Locked) { | |
230 | __jbd2_journal_unfile_buffer(jh); | |
231 | jbd_unlock_bh_state(bh); | |
232 | jbd2_journal_remove_journal_head(bh); | |
233 | put_bh(bh); | |
234 | } else { | |
235 | jbd_unlock_bh_state(bh); | |
236 | } | |
237 | put_bh(bh); | |
238 | cond_resched_lock(&journal->j_list_lock); | |
239 | } | |
240 | return ret; | |
241 | } | |
242 | ||
470decc6 DK |
243 | static void journal_do_submit_data(struct buffer_head **wbuf, int bufs) |
244 | { | |
245 | int i; | |
246 | ||
247 | for (i = 0; i < bufs; i++) { | |
248 | wbuf[i]->b_end_io = end_buffer_write_sync; | |
249 | /* We use-up our safety reference in submit_bh() */ | |
250 | submit_bh(WRITE, wbuf[i]); | |
251 | } | |
252 | } | |
253 | ||
254 | /* | |
255 | * Submit all the data buffers to disk | |
256 | */ | |
257 | static void journal_submit_data_buffers(journal_t *journal, | |
258 | transaction_t *commit_transaction) | |
259 | { | |
260 | struct journal_head *jh; | |
261 | struct buffer_head *bh; | |
262 | int locked; | |
263 | int bufs = 0; | |
264 | struct buffer_head **wbuf = journal->j_wbuf; | |
265 | ||
266 | /* | |
267 | * Whenever we unlock the journal and sleep, things can get added | |
268 | * onto ->t_sync_datalist, so we have to keep looping back to | |
269 | * write_out_data until we *know* that the list is empty. | |
270 | * | |
271 | * Cleanup any flushed data buffers from the data list. Even in | |
272 | * abort mode, we want to flush this out as soon as possible. | |
273 | */ | |
274 | write_out_data: | |
275 | cond_resched(); | |
276 | spin_lock(&journal->j_list_lock); | |
277 | ||
278 | while (commit_transaction->t_sync_datalist) { | |
279 | jh = commit_transaction->t_sync_datalist; | |
280 | bh = jh2bh(jh); | |
281 | locked = 0; | |
282 | ||
283 | /* Get reference just to make sure buffer does not disappear | |
284 | * when we are forced to drop various locks */ | |
285 | get_bh(bh); | |
286 | /* If the buffer is dirty, we need to submit IO and hence | |
287 | * we need the buffer lock. We try to lock the buffer without | |
288 | * blocking. If we fail, we need to drop j_list_lock and do | |
289 | * blocking lock_buffer(). | |
290 | */ | |
291 | if (buffer_dirty(bh)) { | |
292 | if (test_set_buffer_locked(bh)) { | |
293 | BUFFER_TRACE(bh, "needs blocking lock"); | |
294 | spin_unlock(&journal->j_list_lock); | |
295 | /* Write out all data to prevent deadlocks */ | |
296 | journal_do_submit_data(wbuf, bufs); | |
297 | bufs = 0; | |
298 | lock_buffer(bh); | |
299 | spin_lock(&journal->j_list_lock); | |
300 | } | |
301 | locked = 1; | |
302 | } | |
303 | /* We have to get bh_state lock. Again out of order, sigh. */ | |
304 | if (!inverted_lock(journal, bh)) { | |
305 | jbd_lock_bh_state(bh); | |
306 | spin_lock(&journal->j_list_lock); | |
307 | } | |
308 | /* Someone already cleaned up the buffer? */ | |
309 | if (!buffer_jbd(bh) | |
310 | || jh->b_transaction != commit_transaction | |
311 | || jh->b_jlist != BJ_SyncData) { | |
312 | jbd_unlock_bh_state(bh); | |
313 | if (locked) | |
314 | unlock_buffer(bh); | |
315 | BUFFER_TRACE(bh, "already cleaned up"); | |
316 | put_bh(bh); | |
317 | continue; | |
318 | } | |
319 | if (locked && test_clear_buffer_dirty(bh)) { | |
320 | BUFFER_TRACE(bh, "needs writeout, adding to array"); | |
321 | wbuf[bufs++] = bh; | |
f7f4bccb | 322 | __jbd2_journal_file_buffer(jh, commit_transaction, |
470decc6 DK |
323 | BJ_Locked); |
324 | jbd_unlock_bh_state(bh); | |
325 | if (bufs == journal->j_wbufsize) { | |
326 | spin_unlock(&journal->j_list_lock); | |
327 | journal_do_submit_data(wbuf, bufs); | |
328 | bufs = 0; | |
329 | goto write_out_data; | |
330 | } | |
12603925 HH |
331 | } else if (!locked && buffer_locked(bh)) { |
332 | __jbd2_journal_file_buffer(jh, commit_transaction, | |
333 | BJ_Locked); | |
334 | jbd_unlock_bh_state(bh); | |
335 | put_bh(bh); | |
336 | } else { | |
470decc6 | 337 | BUFFER_TRACE(bh, "writeout complete: unfile"); |
f7f4bccb | 338 | __jbd2_journal_unfile_buffer(jh); |
470decc6 DK |
339 | jbd_unlock_bh_state(bh); |
340 | if (locked) | |
341 | unlock_buffer(bh); | |
f7f4bccb | 342 | jbd2_journal_remove_journal_head(bh); |
470decc6 | 343 | /* Once for our safety reference, once for |
f7f4bccb | 344 | * jbd2_journal_remove_journal_head() */ |
470decc6 DK |
345 | put_bh(bh); |
346 | put_bh(bh); | |
347 | } | |
348 | ||
95c354fe | 349 | if (need_resched() || spin_needbreak(&journal->j_list_lock)) { |
470decc6 DK |
350 | spin_unlock(&journal->j_list_lock); |
351 | goto write_out_data; | |
352 | } | |
353 | } | |
354 | spin_unlock(&journal->j_list_lock); | |
355 | journal_do_submit_data(wbuf, bufs); | |
356 | } | |
357 | ||
818d276c GS |
358 | static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh) |
359 | { | |
360 | struct page *page = bh->b_page; | |
361 | char *addr; | |
362 | __u32 checksum; | |
363 | ||
364 | addr = kmap_atomic(page, KM_USER0); | |
365 | checksum = crc32_be(crc32_sum, | |
366 | (void *)(addr + offset_in_page(bh->b_data)), bh->b_size); | |
367 | kunmap_atomic(addr, KM_USER0); | |
368 | ||
369 | return checksum; | |
370 | } | |
371 | ||
372 | static void write_tag_block(int tag_bytes, journal_block_tag_t *tag, | |
18eba7aa | 373 | unsigned long long block) |
b517bea1 ZB |
374 | { |
375 | tag->t_blocknr = cpu_to_be32(block & (u32)~0); | |
cd02ff0b | 376 | if (tag_bytes > JBD2_TAG_SIZE32) |
b517bea1 ZB |
377 | tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); |
378 | } | |
379 | ||
470decc6 | 380 | /* |
f7f4bccb | 381 | * jbd2_journal_commit_transaction |
470decc6 DK |
382 | * |
383 | * The primary function for committing a transaction to the log. This | |
384 | * function is called by the journal thread to begin a complete commit. | |
385 | */ | |
f7f4bccb | 386 | void jbd2_journal_commit_transaction(journal_t *journal) |
470decc6 | 387 | { |
8e85fb3f | 388 | struct transaction_stats_s stats; |
470decc6 DK |
389 | transaction_t *commit_transaction; |
390 | struct journal_head *jh, *new_jh, *descriptor; | |
391 | struct buffer_head **wbuf = journal->j_wbuf; | |
392 | int bufs; | |
393 | int flags; | |
394 | int err; | |
18eba7aa | 395 | unsigned long long blocknr; |
470decc6 DK |
396 | char *tagp = NULL; |
397 | journal_header_t *header; | |
398 | journal_block_tag_t *tag = NULL; | |
399 | int space_left = 0; | |
400 | int first_tag = 0; | |
401 | int tag_flag; | |
402 | int i; | |
b517bea1 | 403 | int tag_bytes = journal_tag_bytes(journal); |
818d276c GS |
404 | struct buffer_head *cbh = NULL; /* For transactional checksums */ |
405 | __u32 crc32_sum = ~0; | |
470decc6 DK |
406 | |
407 | /* | |
408 | * First job: lock down the current transaction and wait for | |
409 | * all outstanding updates to complete. | |
410 | */ | |
411 | ||
412 | #ifdef COMMIT_STATS | |
413 | spin_lock(&journal->j_list_lock); | |
414 | summarise_journal_usage(journal); | |
415 | spin_unlock(&journal->j_list_lock); | |
416 | #endif | |
417 | ||
f7f4bccb MC |
418 | /* Do we need to erase the effects of a prior jbd2_journal_flush? */ |
419 | if (journal->j_flags & JBD2_FLUSHED) { | |
470decc6 | 420 | jbd_debug(3, "super block updated\n"); |
f7f4bccb | 421 | jbd2_journal_update_superblock(journal, 1); |
470decc6 DK |
422 | } else { |
423 | jbd_debug(3, "superblock not updated\n"); | |
424 | } | |
425 | ||
426 | J_ASSERT(journal->j_running_transaction != NULL); | |
427 | J_ASSERT(journal->j_committing_transaction == NULL); | |
428 | ||
429 | commit_transaction = journal->j_running_transaction; | |
430 | J_ASSERT(commit_transaction->t_state == T_RUNNING); | |
431 | ||
432 | jbd_debug(1, "JBD: starting commit of transaction %d\n", | |
433 | commit_transaction->t_tid); | |
434 | ||
435 | spin_lock(&journal->j_state_lock); | |
436 | commit_transaction->t_state = T_LOCKED; | |
437 | ||
8e85fb3f JL |
438 | stats.u.run.rs_wait = commit_transaction->t_max_wait; |
439 | stats.u.run.rs_locked = jiffies; | |
440 | stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, | |
441 | stats.u.run.rs_locked); | |
442 | ||
470decc6 DK |
443 | spin_lock(&commit_transaction->t_handle_lock); |
444 | while (commit_transaction->t_updates) { | |
445 | DEFINE_WAIT(wait); | |
446 | ||
447 | prepare_to_wait(&journal->j_wait_updates, &wait, | |
448 | TASK_UNINTERRUPTIBLE); | |
449 | if (commit_transaction->t_updates) { | |
450 | spin_unlock(&commit_transaction->t_handle_lock); | |
451 | spin_unlock(&journal->j_state_lock); | |
452 | schedule(); | |
453 | spin_lock(&journal->j_state_lock); | |
454 | spin_lock(&commit_transaction->t_handle_lock); | |
455 | } | |
456 | finish_wait(&journal->j_wait_updates, &wait); | |
457 | } | |
458 | spin_unlock(&commit_transaction->t_handle_lock); | |
459 | ||
460 | J_ASSERT (commit_transaction->t_outstanding_credits <= | |
461 | journal->j_max_transaction_buffers); | |
462 | ||
463 | /* | |
464 | * First thing we are allowed to do is to discard any remaining | |
465 | * BJ_Reserved buffers. Note, it is _not_ permissible to assume | |
466 | * that there are no such buffers: if a large filesystem | |
467 | * operation like a truncate needs to split itself over multiple | |
f7f4bccb | 468 | * transactions, then it may try to do a jbd2_journal_restart() while |
470decc6 DK |
469 | * there are still BJ_Reserved buffers outstanding. These must |
470 | * be released cleanly from the current transaction. | |
471 | * | |
472 | * In this case, the filesystem must still reserve write access | |
473 | * again before modifying the buffer in the new transaction, but | |
474 | * we do not require it to remember exactly which old buffers it | |
475 | * has reserved. This is consistent with the existing behaviour | |
f7f4bccb | 476 | * that multiple jbd2_journal_get_write_access() calls to the same |
470decc6 DK |
477 | * buffer are perfectly permissable. |
478 | */ | |
479 | while (commit_transaction->t_reserved_list) { | |
480 | jh = commit_transaction->t_reserved_list; | |
481 | JBUFFER_TRACE(jh, "reserved, unused: refile"); | |
482 | /* | |
f7f4bccb | 483 | * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may |
470decc6 DK |
484 | * leave undo-committed data. |
485 | */ | |
486 | if (jh->b_committed_data) { | |
487 | struct buffer_head *bh = jh2bh(jh); | |
488 | ||
489 | jbd_lock_bh_state(bh); | |
af1e76d6 | 490 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
491 | jh->b_committed_data = NULL; |
492 | jbd_unlock_bh_state(bh); | |
493 | } | |
f7f4bccb | 494 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
495 | } |
496 | ||
497 | /* | |
498 | * Now try to drop any written-back buffers from the journal's | |
499 | * checkpoint lists. We do this *before* commit because it potentially | |
500 | * frees some memory | |
501 | */ | |
502 | spin_lock(&journal->j_list_lock); | |
f7f4bccb | 503 | __jbd2_journal_clean_checkpoint_list(journal); |
470decc6 DK |
504 | spin_unlock(&journal->j_list_lock); |
505 | ||
506 | jbd_debug (3, "JBD: commit phase 1\n"); | |
507 | ||
508 | /* | |
509 | * Switch to a new revoke table. | |
510 | */ | |
f7f4bccb | 511 | jbd2_journal_switch_revoke_table(journal); |
470decc6 | 512 | |
8e85fb3f JL |
513 | stats.u.run.rs_flushing = jiffies; |
514 | stats.u.run.rs_locked = jbd2_time_diff(stats.u.run.rs_locked, | |
515 | stats.u.run.rs_flushing); | |
516 | ||
470decc6 DK |
517 | commit_transaction->t_state = T_FLUSH; |
518 | journal->j_committing_transaction = commit_transaction; | |
519 | journal->j_running_transaction = NULL; | |
520 | commit_transaction->t_log_start = journal->j_head; | |
521 | wake_up(&journal->j_wait_transaction_locked); | |
522 | spin_unlock(&journal->j_state_lock); | |
523 | ||
524 | jbd_debug (3, "JBD: commit phase 2\n"); | |
525 | ||
470decc6 DK |
526 | /* |
527 | * Now start flushing things to disk, in the order they appear | |
528 | * on the transaction lists. Data blocks go first. | |
529 | */ | |
530 | err = 0; | |
531 | journal_submit_data_buffers(journal, commit_transaction); | |
532 | ||
533 | /* | |
818d276c GS |
534 | * Wait for all previously submitted IO to complete if commit |
535 | * record is to be written synchronously. | |
470decc6 DK |
536 | */ |
537 | spin_lock(&journal->j_list_lock); | |
818d276c GS |
538 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
539 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) | |
540 | err = journal_wait_on_locked_list(journal, | |
541 | commit_transaction); | |
470decc6 | 542 | |
470decc6 DK |
543 | spin_unlock(&journal->j_list_lock); |
544 | ||
545 | if (err) | |
a7fa2baf | 546 | jbd2_journal_abort(journal, err); |
470decc6 | 547 | |
f7f4bccb | 548 | jbd2_journal_write_revoke_records(journal, commit_transaction); |
470decc6 DK |
549 | |
550 | jbd_debug(3, "JBD: commit phase 2\n"); | |
551 | ||
552 | /* | |
553 | * If we found any dirty or locked buffers, then we should have | |
554 | * looped back up to the write_out_data label. If there weren't | |
555 | * any then journal_clean_data_list should have wiped the list | |
556 | * clean by now, so check that it is in fact empty. | |
557 | */ | |
558 | J_ASSERT (commit_transaction->t_sync_datalist == NULL); | |
559 | ||
560 | jbd_debug (3, "JBD: commit phase 3\n"); | |
561 | ||
562 | /* | |
563 | * Way to go: we have now written out all of the data for a | |
564 | * transaction! Now comes the tricky part: we need to write out | |
565 | * metadata. Loop over the transaction's entire buffer list: | |
566 | */ | |
02c471cb | 567 | spin_lock(&journal->j_state_lock); |
470decc6 | 568 | commit_transaction->t_state = T_COMMIT; |
02c471cb | 569 | spin_unlock(&journal->j_state_lock); |
470decc6 | 570 | |
8e85fb3f JL |
571 | stats.u.run.rs_logging = jiffies; |
572 | stats.u.run.rs_flushing = jbd2_time_diff(stats.u.run.rs_flushing, | |
573 | stats.u.run.rs_logging); | |
574 | stats.u.run.rs_blocks = commit_transaction->t_outstanding_credits; | |
575 | stats.u.run.rs_blocks_logged = 0; | |
576 | ||
1dfc3220 JB |
577 | J_ASSERT(commit_transaction->t_nr_buffers <= |
578 | commit_transaction->t_outstanding_credits); | |
579 | ||
470decc6 DK |
580 | descriptor = NULL; |
581 | bufs = 0; | |
582 | while (commit_transaction->t_buffers) { | |
583 | ||
584 | /* Find the next buffer to be journaled... */ | |
585 | ||
586 | jh = commit_transaction->t_buffers; | |
587 | ||
588 | /* If we're in abort mode, we just un-journal the buffer and | |
589 | release it for background writing. */ | |
590 | ||
591 | if (is_journal_aborted(journal)) { | |
592 | JBUFFER_TRACE(jh, "journal is aborting: refile"); | |
f7f4bccb | 593 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
594 | /* If that was the last one, we need to clean up |
595 | * any descriptor buffers which may have been | |
596 | * already allocated, even if we are now | |
597 | * aborting. */ | |
598 | if (!commit_transaction->t_buffers) | |
599 | goto start_journal_io; | |
600 | continue; | |
601 | } | |
602 | ||
603 | /* Make sure we have a descriptor block in which to | |
604 | record the metadata buffer. */ | |
605 | ||
606 | if (!descriptor) { | |
607 | struct buffer_head *bh; | |
608 | ||
609 | J_ASSERT (bufs == 0); | |
610 | ||
611 | jbd_debug(4, "JBD: get descriptor\n"); | |
612 | ||
f7f4bccb | 613 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 | 614 | if (!descriptor) { |
a7fa2baf | 615 | jbd2_journal_abort(journal, -EIO); |
470decc6 DK |
616 | continue; |
617 | } | |
618 | ||
619 | bh = jh2bh(descriptor); | |
620 | jbd_debug(4, "JBD: got buffer %llu (%p)\n", | |
621 | (unsigned long long)bh->b_blocknr, bh->b_data); | |
622 | header = (journal_header_t *)&bh->b_data[0]; | |
f7f4bccb MC |
623 | header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
624 | header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); | |
470decc6 DK |
625 | header->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
626 | ||
627 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
628 | space_left = bh->b_size - sizeof(journal_header_t); | |
629 | first_tag = 1; | |
630 | set_buffer_jwrite(bh); | |
631 | set_buffer_dirty(bh); | |
632 | wbuf[bufs++] = bh; | |
633 | ||
634 | /* Record it so that we can wait for IO | |
635 | completion later */ | |
636 | BUFFER_TRACE(bh, "ph3: file as descriptor"); | |
f7f4bccb | 637 | jbd2_journal_file_buffer(descriptor, commit_transaction, |
470decc6 DK |
638 | BJ_LogCtl); |
639 | } | |
640 | ||
641 | /* Where is the buffer to be written? */ | |
642 | ||
f7f4bccb | 643 | err = jbd2_journal_next_log_block(journal, &blocknr); |
470decc6 DK |
644 | /* If the block mapping failed, just abandon the buffer |
645 | and repeat this loop: we'll fall into the | |
646 | refile-on-abort condition above. */ | |
647 | if (err) { | |
a7fa2baf | 648 | jbd2_journal_abort(journal, err); |
470decc6 DK |
649 | continue; |
650 | } | |
651 | ||
652 | /* | |
653 | * start_this_handle() uses t_outstanding_credits to determine | |
654 | * the free space in the log, but this counter is changed | |
f7f4bccb | 655 | * by jbd2_journal_next_log_block() also. |
470decc6 DK |
656 | */ |
657 | commit_transaction->t_outstanding_credits--; | |
658 | ||
659 | /* Bump b_count to prevent truncate from stumbling over | |
660 | the shadowed buffer! @@@ This can go if we ever get | |
661 | rid of the BJ_IO/BJ_Shadow pairing of buffers. */ | |
662 | atomic_inc(&jh2bh(jh)->b_count); | |
663 | ||
664 | /* Make a temporary IO buffer with which to write it out | |
665 | (this will requeue both the metadata buffer and the | |
666 | temporary IO buffer). new_bh goes on BJ_IO*/ | |
667 | ||
668 | set_bit(BH_JWrite, &jh2bh(jh)->b_state); | |
669 | /* | |
f7f4bccb | 670 | * akpm: jbd2_journal_write_metadata_buffer() sets |
470decc6 DK |
671 | * new_bh->b_transaction to commit_transaction. |
672 | * We need to clean this up before we release new_bh | |
673 | * (which is of type BJ_IO) | |
674 | */ | |
675 | JBUFFER_TRACE(jh, "ph3: write metadata"); | |
f7f4bccb | 676 | flags = jbd2_journal_write_metadata_buffer(commit_transaction, |
470decc6 DK |
677 | jh, &new_jh, blocknr); |
678 | set_bit(BH_JWrite, &jh2bh(new_jh)->b_state); | |
679 | wbuf[bufs++] = jh2bh(new_jh); | |
680 | ||
681 | /* Record the new block's tag in the current descriptor | |
682 | buffer */ | |
683 | ||
684 | tag_flag = 0; | |
685 | if (flags & 1) | |
f7f4bccb | 686 | tag_flag |= JBD2_FLAG_ESCAPE; |
470decc6 | 687 | if (!first_tag) |
f7f4bccb | 688 | tag_flag |= JBD2_FLAG_SAME_UUID; |
470decc6 DK |
689 | |
690 | tag = (journal_block_tag_t *) tagp; | |
b517bea1 | 691 | write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr); |
470decc6 | 692 | tag->t_flags = cpu_to_be32(tag_flag); |
b517bea1 ZB |
693 | tagp += tag_bytes; |
694 | space_left -= tag_bytes; | |
470decc6 DK |
695 | |
696 | if (first_tag) { | |
697 | memcpy (tagp, journal->j_uuid, 16); | |
698 | tagp += 16; | |
699 | space_left -= 16; | |
700 | first_tag = 0; | |
701 | } | |
702 | ||
703 | /* If there's no more to do, or if the descriptor is full, | |
704 | let the IO rip! */ | |
705 | ||
706 | if (bufs == journal->j_wbufsize || | |
707 | commit_transaction->t_buffers == NULL || | |
b517bea1 | 708 | space_left < tag_bytes + 16) { |
470decc6 DK |
709 | |
710 | jbd_debug(4, "JBD: Submit %d IOs\n", bufs); | |
711 | ||
712 | /* Write an end-of-descriptor marker before | |
713 | submitting the IOs. "tag" still points to | |
714 | the last tag we set up. */ | |
715 | ||
f7f4bccb | 716 | tag->t_flags |= cpu_to_be32(JBD2_FLAG_LAST_TAG); |
470decc6 DK |
717 | |
718 | start_journal_io: | |
719 | for (i = 0; i < bufs; i++) { | |
720 | struct buffer_head *bh = wbuf[i]; | |
818d276c GS |
721 | /* |
722 | * Compute checksum. | |
723 | */ | |
724 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
725 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
726 | crc32_sum = | |
727 | jbd2_checksum_data(crc32_sum, bh); | |
728 | } | |
729 | ||
470decc6 DK |
730 | lock_buffer(bh); |
731 | clear_buffer_dirty(bh); | |
732 | set_buffer_uptodate(bh); | |
733 | bh->b_end_io = journal_end_buffer_io_sync; | |
734 | submit_bh(WRITE, bh); | |
735 | } | |
736 | cond_resched(); | |
8e85fb3f | 737 | stats.u.run.rs_blocks_logged += bufs; |
470decc6 DK |
738 | |
739 | /* Force a new descriptor to be generated next | |
740 | time round the loop. */ | |
741 | descriptor = NULL; | |
742 | bufs = 0; | |
743 | } | |
744 | } | |
745 | ||
818d276c GS |
746 | /* Done it all: now write the commit record asynchronously. */ |
747 | ||
748 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, | |
749 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
750 | err = journal_submit_commit_record(journal, commit_transaction, | |
751 | &cbh, crc32_sum); | |
752 | if (err) | |
753 | __jbd2_journal_abort_hard(journal); | |
754 | ||
755 | spin_lock(&journal->j_list_lock); | |
756 | err = journal_wait_on_locked_list(journal, | |
757 | commit_transaction); | |
758 | spin_unlock(&journal->j_list_lock); | |
759 | if (err) | |
760 | __jbd2_journal_abort_hard(journal); | |
761 | } | |
762 | ||
470decc6 DK |
763 | /* Lo and behold: we have just managed to send a transaction to |
764 | the log. Before we can commit it, wait for the IO so far to | |
765 | complete. Control buffers being written are on the | |
766 | transaction's t_log_list queue, and metadata buffers are on | |
767 | the t_iobuf_list queue. | |
768 | ||
769 | Wait for the buffers in reverse order. That way we are | |
770 | less likely to be woken up until all IOs have completed, and | |
771 | so we incur less scheduling load. | |
772 | */ | |
773 | ||
774 | jbd_debug(3, "JBD: commit phase 4\n"); | |
775 | ||
776 | /* | |
777 | * akpm: these are BJ_IO, and j_list_lock is not needed. | |
778 | * See __journal_try_to_free_buffer. | |
779 | */ | |
780 | wait_for_iobuf: | |
781 | while (commit_transaction->t_iobuf_list != NULL) { | |
782 | struct buffer_head *bh; | |
783 | ||
784 | jh = commit_transaction->t_iobuf_list->b_tprev; | |
785 | bh = jh2bh(jh); | |
786 | if (buffer_locked(bh)) { | |
787 | wait_on_buffer(bh); | |
788 | goto wait_for_iobuf; | |
789 | } | |
790 | if (cond_resched()) | |
791 | goto wait_for_iobuf; | |
792 | ||
793 | if (unlikely(!buffer_uptodate(bh))) | |
794 | err = -EIO; | |
795 | ||
796 | clear_buffer_jwrite(bh); | |
797 | ||
798 | JBUFFER_TRACE(jh, "ph4: unfile after journal write"); | |
f7f4bccb | 799 | jbd2_journal_unfile_buffer(journal, jh); |
470decc6 DK |
800 | |
801 | /* | |
802 | * ->t_iobuf_list should contain only dummy buffer_heads | |
f7f4bccb | 803 | * which were created by jbd2_journal_write_metadata_buffer(). |
470decc6 DK |
804 | */ |
805 | BUFFER_TRACE(bh, "dumping temporary bh"); | |
f7f4bccb | 806 | jbd2_journal_put_journal_head(jh); |
470decc6 DK |
807 | __brelse(bh); |
808 | J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0); | |
809 | free_buffer_head(bh); | |
810 | ||
811 | /* We also have to unlock and free the corresponding | |
812 | shadowed buffer */ | |
813 | jh = commit_transaction->t_shadow_list->b_tprev; | |
814 | bh = jh2bh(jh); | |
815 | clear_bit(BH_JWrite, &bh->b_state); | |
816 | J_ASSERT_BH(bh, buffer_jbddirty(bh)); | |
817 | ||
818 | /* The metadata is now released for reuse, but we need | |
819 | to remember it against this transaction so that when | |
820 | we finally commit, we can do any checkpointing | |
821 | required. */ | |
822 | JBUFFER_TRACE(jh, "file as BJ_Forget"); | |
f7f4bccb | 823 | jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget); |
470decc6 DK |
824 | /* Wake up any transactions which were waiting for this |
825 | IO to complete */ | |
826 | wake_up_bit(&bh->b_state, BH_Unshadow); | |
827 | JBUFFER_TRACE(jh, "brelse shadowed buffer"); | |
828 | __brelse(bh); | |
829 | } | |
830 | ||
831 | J_ASSERT (commit_transaction->t_shadow_list == NULL); | |
832 | ||
833 | jbd_debug(3, "JBD: commit phase 5\n"); | |
834 | ||
835 | /* Here we wait for the revoke record and descriptor record buffers */ | |
836 | wait_for_ctlbuf: | |
837 | while (commit_transaction->t_log_list != NULL) { | |
838 | struct buffer_head *bh; | |
839 | ||
840 | jh = commit_transaction->t_log_list->b_tprev; | |
841 | bh = jh2bh(jh); | |
842 | if (buffer_locked(bh)) { | |
843 | wait_on_buffer(bh); | |
844 | goto wait_for_ctlbuf; | |
845 | } | |
846 | if (cond_resched()) | |
847 | goto wait_for_ctlbuf; | |
848 | ||
849 | if (unlikely(!buffer_uptodate(bh))) | |
850 | err = -EIO; | |
851 | ||
852 | BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile"); | |
853 | clear_buffer_jwrite(bh); | |
f7f4bccb MC |
854 | jbd2_journal_unfile_buffer(journal, jh); |
855 | jbd2_journal_put_journal_head(jh); | |
470decc6 DK |
856 | __brelse(bh); /* One for getblk */ |
857 | /* AKPM: bforget here */ | |
858 | } | |
859 | ||
860 | jbd_debug(3, "JBD: commit phase 6\n"); | |
861 | ||
818d276c GS |
862 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
863 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
864 | err = journal_submit_commit_record(journal, commit_transaction, | |
865 | &cbh, crc32_sum); | |
866 | if (err) | |
867 | __jbd2_journal_abort_hard(journal); | |
868 | } | |
b048d846 MC |
869 | if (!err && !is_journal_aborted(journal)) |
870 | err = journal_wait_on_commit_record(cbh); | |
470decc6 DK |
871 | |
872 | if (err) | |
a7fa2baf | 873 | jbd2_journal_abort(journal, err); |
470decc6 DK |
874 | |
875 | /* End of a transaction! Finally, we can do checkpoint | |
876 | processing: any buffers committed as a result of this | |
877 | transaction can be removed from any checkpoint list it was on | |
878 | before. */ | |
879 | ||
880 | jbd_debug(3, "JBD: commit phase 7\n"); | |
881 | ||
882 | J_ASSERT(commit_transaction->t_sync_datalist == NULL); | |
883 | J_ASSERT(commit_transaction->t_buffers == NULL); | |
884 | J_ASSERT(commit_transaction->t_checkpoint_list == NULL); | |
885 | J_ASSERT(commit_transaction->t_iobuf_list == NULL); | |
886 | J_ASSERT(commit_transaction->t_shadow_list == NULL); | |
887 | J_ASSERT(commit_transaction->t_log_list == NULL); | |
888 | ||
889 | restart_loop: | |
890 | /* | |
891 | * As there are other places (journal_unmap_buffer()) adding buffers | |
892 | * to this list we have to be careful and hold the j_list_lock. | |
893 | */ | |
894 | spin_lock(&journal->j_list_lock); | |
895 | while (commit_transaction->t_forget) { | |
896 | transaction_t *cp_transaction; | |
897 | struct buffer_head *bh; | |
898 | ||
899 | jh = commit_transaction->t_forget; | |
900 | spin_unlock(&journal->j_list_lock); | |
901 | bh = jh2bh(jh); | |
902 | jbd_lock_bh_state(bh); | |
903 | J_ASSERT_JH(jh, jh->b_transaction == commit_transaction || | |
904 | jh->b_transaction == journal->j_running_transaction); | |
905 | ||
906 | /* | |
907 | * If there is undo-protected committed data against | |
908 | * this buffer, then we can remove it now. If it is a | |
909 | * buffer needing such protection, the old frozen_data | |
910 | * field now points to a committed version of the | |
911 | * buffer, so rotate that field to the new committed | |
912 | * data. | |
913 | * | |
914 | * Otherwise, we can just throw away the frozen data now. | |
915 | */ | |
916 | if (jh->b_committed_data) { | |
af1e76d6 | 917 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
918 | jh->b_committed_data = NULL; |
919 | if (jh->b_frozen_data) { | |
920 | jh->b_committed_data = jh->b_frozen_data; | |
921 | jh->b_frozen_data = NULL; | |
922 | } | |
923 | } else if (jh->b_frozen_data) { | |
af1e76d6 | 924 | jbd2_free(jh->b_frozen_data, bh->b_size); |
470decc6 DK |
925 | jh->b_frozen_data = NULL; |
926 | } | |
927 | ||
928 | spin_lock(&journal->j_list_lock); | |
929 | cp_transaction = jh->b_cp_transaction; | |
930 | if (cp_transaction) { | |
931 | JBUFFER_TRACE(jh, "remove from old cp transaction"); | |
8e85fb3f | 932 | cp_transaction->t_chp_stats.cs_dropped++; |
f7f4bccb | 933 | __jbd2_journal_remove_checkpoint(jh); |
470decc6 DK |
934 | } |
935 | ||
936 | /* Only re-checkpoint the buffer_head if it is marked | |
937 | * dirty. If the buffer was added to the BJ_Forget list | |
f7f4bccb | 938 | * by jbd2_journal_forget, it may no longer be dirty and |
470decc6 DK |
939 | * there's no point in keeping a checkpoint record for |
940 | * it. */ | |
941 | ||
942 | /* A buffer which has been freed while still being | |
943 | * journaled by a previous transaction may end up still | |
944 | * being dirty here, but we want to avoid writing back | |
945 | * that buffer in the future now that the last use has | |
946 | * been committed. That's not only a performance gain, | |
947 | * it also stops aliasing problems if the buffer is left | |
948 | * behind for writeback and gets reallocated for another | |
949 | * use in a different page. */ | |
950 | if (buffer_freed(bh)) { | |
951 | clear_buffer_freed(bh); | |
952 | clear_buffer_jbddirty(bh); | |
953 | } | |
954 | ||
955 | if (buffer_jbddirty(bh)) { | |
956 | JBUFFER_TRACE(jh, "add to new checkpointing trans"); | |
f7f4bccb | 957 | __jbd2_journal_insert_checkpoint(jh, commit_transaction); |
470decc6 | 958 | JBUFFER_TRACE(jh, "refile for checkpoint writeback"); |
f7f4bccb | 959 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
960 | jbd_unlock_bh_state(bh); |
961 | } else { | |
962 | J_ASSERT_BH(bh, !buffer_dirty(bh)); | |
963 | /* The buffer on BJ_Forget list and not jbddirty means | |
964 | * it has been freed by this transaction and hence it | |
965 | * could not have been reallocated until this | |
966 | * transaction has committed. *BUT* it could be | |
967 | * reallocated once we have written all the data to | |
968 | * disk and before we process the buffer on BJ_Forget | |
969 | * list. */ | |
970 | JBUFFER_TRACE(jh, "refile or unfile freed buffer"); | |
f7f4bccb | 971 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
972 | if (!jh->b_transaction) { |
973 | jbd_unlock_bh_state(bh); | |
974 | /* needs a brelse */ | |
f7f4bccb | 975 | jbd2_journal_remove_journal_head(bh); |
470decc6 DK |
976 | release_buffer_page(bh); |
977 | } else | |
978 | jbd_unlock_bh_state(bh); | |
979 | } | |
980 | cond_resched_lock(&journal->j_list_lock); | |
981 | } | |
982 | spin_unlock(&journal->j_list_lock); | |
983 | /* | |
f5a7a6b0 JK |
984 | * This is a bit sleazy. We use j_list_lock to protect transition |
985 | * of a transaction into T_FINISHED state and calling | |
986 | * __jbd2_journal_drop_transaction(). Otherwise we could race with | |
987 | * other checkpointing code processing the transaction... | |
470decc6 DK |
988 | */ |
989 | spin_lock(&journal->j_state_lock); | |
990 | spin_lock(&journal->j_list_lock); | |
991 | /* | |
992 | * Now recheck if some buffers did not get attached to the transaction | |
993 | * while the lock was dropped... | |
994 | */ | |
995 | if (commit_transaction->t_forget) { | |
996 | spin_unlock(&journal->j_list_lock); | |
997 | spin_unlock(&journal->j_state_lock); | |
998 | goto restart_loop; | |
999 | } | |
1000 | ||
1001 | /* Done with this transaction! */ | |
1002 | ||
1003 | jbd_debug(3, "JBD: commit phase 8\n"); | |
1004 | ||
1005 | J_ASSERT(commit_transaction->t_state == T_COMMIT); | |
1006 | ||
8e85fb3f JL |
1007 | commit_transaction->t_start = jiffies; |
1008 | stats.u.run.rs_logging = jbd2_time_diff(stats.u.run.rs_logging, | |
1009 | commit_transaction->t_start); | |
1010 | ||
1011 | /* | |
1012 | * File the transaction for history | |
1013 | */ | |
1014 | stats.ts_type = JBD2_STATS_RUN; | |
1015 | stats.ts_tid = commit_transaction->t_tid; | |
1016 | stats.u.run.rs_handle_count = commit_transaction->t_handle_count; | |
1017 | spin_lock(&journal->j_history_lock); | |
1018 | memcpy(journal->j_history + journal->j_history_cur, &stats, | |
1019 | sizeof(stats)); | |
1020 | if (++journal->j_history_cur == journal->j_history_max) | |
1021 | journal->j_history_cur = 0; | |
1022 | ||
1023 | /* | |
1024 | * Calculate overall stats | |
1025 | */ | |
1026 | journal->j_stats.ts_tid++; | |
1027 | journal->j_stats.u.run.rs_wait += stats.u.run.rs_wait; | |
1028 | journal->j_stats.u.run.rs_running += stats.u.run.rs_running; | |
1029 | journal->j_stats.u.run.rs_locked += stats.u.run.rs_locked; | |
1030 | journal->j_stats.u.run.rs_flushing += stats.u.run.rs_flushing; | |
1031 | journal->j_stats.u.run.rs_logging += stats.u.run.rs_logging; | |
1032 | journal->j_stats.u.run.rs_handle_count += stats.u.run.rs_handle_count; | |
1033 | journal->j_stats.u.run.rs_blocks += stats.u.run.rs_blocks; | |
1034 | journal->j_stats.u.run.rs_blocks_logged += stats.u.run.rs_blocks_logged; | |
1035 | spin_unlock(&journal->j_history_lock); | |
1036 | ||
470decc6 DK |
1037 | commit_transaction->t_state = T_FINISHED; |
1038 | J_ASSERT(commit_transaction == journal->j_committing_transaction); | |
1039 | journal->j_commit_sequence = commit_transaction->t_tid; | |
1040 | journal->j_committing_transaction = NULL; | |
1041 | spin_unlock(&journal->j_state_lock); | |
1042 | ||
f89b7795 JK |
1043 | if (commit_transaction->t_checkpoint_list == NULL && |
1044 | commit_transaction->t_checkpoint_io_list == NULL) { | |
f7f4bccb | 1045 | __jbd2_journal_drop_transaction(journal, commit_transaction); |
470decc6 DK |
1046 | } else { |
1047 | if (journal->j_checkpoint_transactions == NULL) { | |
1048 | journal->j_checkpoint_transactions = commit_transaction; | |
1049 | commit_transaction->t_cpnext = commit_transaction; | |
1050 | commit_transaction->t_cpprev = commit_transaction; | |
1051 | } else { | |
1052 | commit_transaction->t_cpnext = | |
1053 | journal->j_checkpoint_transactions; | |
1054 | commit_transaction->t_cpprev = | |
1055 | commit_transaction->t_cpnext->t_cpprev; | |
1056 | commit_transaction->t_cpnext->t_cpprev = | |
1057 | commit_transaction; | |
1058 | commit_transaction->t_cpprev->t_cpnext = | |
1059 | commit_transaction; | |
1060 | } | |
1061 | } | |
1062 | spin_unlock(&journal->j_list_lock); | |
1063 | ||
1064 | jbd_debug(1, "JBD: commit %d complete, head %d\n", | |
1065 | journal->j_commit_sequence, journal->j_tail_sequence); | |
1066 | ||
1067 | wake_up(&journal->j_wait_done_commit); | |
1068 | } |