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> |
ede86cc4 | 19 | #include <linux/marker.h> |
470decc6 DK |
20 | #include <linux/errno.h> |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/pagemap.h> | |
8e85fb3f | 24 | #include <linux/jiffies.h> |
818d276c | 25 | #include <linux/crc32.h> |
cd1aac32 AK |
26 | #include <linux/writeback.h> |
27 | #include <linux/backing-dev.h> | |
fd98496f | 28 | #include <linux/bio.h> |
470decc6 DK |
29 | |
30 | /* | |
31 | * Default IO end handler for temporary BJ_IO buffer_heads. | |
32 | */ | |
33 | static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate) | |
34 | { | |
35 | BUFFER_TRACE(bh, ""); | |
36 | if (uptodate) | |
37 | set_buffer_uptodate(bh); | |
38 | else | |
39 | clear_buffer_uptodate(bh); | |
40 | unlock_buffer(bh); | |
41 | } | |
42 | ||
43 | /* | |
87c89c23 JK |
44 | * When an ext4 file is truncated, it is possible that some pages are not |
45 | * successfully freed, because they are attached to a committing transaction. | |
470decc6 DK |
46 | * After the transaction commits, these pages are left on the LRU, with no |
47 | * ->mapping, and with attached buffers. These pages are trivially reclaimable | |
48 | * by the VM, but their apparent absence upsets the VM accounting, and it makes | |
49 | * the numbers in /proc/meminfo look odd. | |
50 | * | |
51 | * So here, we have a buffer which has just come off the forget list. Look to | |
52 | * see if we can strip all buffers from the backing page. | |
53 | * | |
54 | * Called under lock_journal(), and possibly under journal_datalist_lock. The | |
55 | * caller provided us with a ref against the buffer, and we drop that here. | |
56 | */ | |
57 | static void release_buffer_page(struct buffer_head *bh) | |
58 | { | |
59 | struct page *page; | |
60 | ||
61 | if (buffer_dirty(bh)) | |
62 | goto nope; | |
63 | if (atomic_read(&bh->b_count) != 1) | |
64 | goto nope; | |
65 | page = bh->b_page; | |
66 | if (!page) | |
67 | goto nope; | |
68 | if (page->mapping) | |
69 | goto nope; | |
70 | ||
71 | /* OK, it's a truncated page */ | |
529ae9aa | 72 | if (!trylock_page(page)) |
470decc6 DK |
73 | goto nope; |
74 | ||
75 | page_cache_get(page); | |
76 | __brelse(bh); | |
77 | try_to_free_buffers(page); | |
78 | unlock_page(page); | |
79 | page_cache_release(page); | |
80 | return; | |
81 | ||
82 | nope: | |
83 | __brelse(bh); | |
84 | } | |
85 | ||
818d276c GS |
86 | /* |
87 | * Done it all: now submit the commit record. We should have | |
470decc6 DK |
88 | * cleaned up our previous buffers by now, so if we are in abort |
89 | * mode we can now just skip the rest of the journal write | |
90 | * entirely. | |
91 | * | |
92 | * Returns 1 if the journal needs to be aborted or 0 on success | |
93 | */ | |
818d276c GS |
94 | static int journal_submit_commit_record(journal_t *journal, |
95 | transaction_t *commit_transaction, | |
96 | struct buffer_head **cbh, | |
97 | __u32 crc32_sum) | |
470decc6 DK |
98 | { |
99 | struct journal_head *descriptor; | |
818d276c | 100 | struct commit_header *tmp; |
470decc6 | 101 | struct buffer_head *bh; |
818d276c | 102 | int ret; |
470decc6 | 103 | int barrier_done = 0; |
736603ab | 104 | struct timespec now = current_kernel_time(); |
470decc6 DK |
105 | |
106 | if (is_journal_aborted(journal)) | |
107 | return 0; | |
108 | ||
f7f4bccb | 109 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 DK |
110 | if (!descriptor) |
111 | return 1; | |
112 | ||
113 | bh = jh2bh(descriptor); | |
114 | ||
818d276c GS |
115 | tmp = (struct commit_header *)bh->b_data; |
116 | tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); | |
117 | tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); | |
118 | tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); | |
736603ab TT |
119 | tmp->h_commit_sec = cpu_to_be64(now.tv_sec); |
120 | tmp->h_commit_nsec = cpu_to_be32(now.tv_nsec); | |
818d276c GS |
121 | |
122 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
123 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
124 | tmp->h_chksum_type = JBD2_CRC32_CHKSUM; | |
125 | tmp->h_chksum_size = JBD2_CRC32_CHKSUM_SIZE; | |
126 | tmp->h_chksum[0] = cpu_to_be32(crc32_sum); | |
470decc6 DK |
127 | } |
128 | ||
818d276c GS |
129 | JBUFFER_TRACE(descriptor, "submit commit block"); |
130 | lock_buffer(bh); | |
45a90bfd | 131 | clear_buffer_dirty(bh); |
818d276c GS |
132 | set_buffer_uptodate(bh); |
133 | bh->b_end_io = journal_end_buffer_io_sync; | |
134 | ||
135 | if (journal->j_flags & JBD2_BARRIER && | |
4d605179 | 136 | !JBD2_HAS_INCOMPAT_FEATURE(journal, |
818d276c | 137 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
470decc6 DK |
138 | set_buffer_ordered(bh); |
139 | barrier_done = 1; | |
140 | } | |
40a1984d | 141 | ret = submit_bh(WRITE_SYNC, bh); |
c4e35e07 DK |
142 | if (barrier_done) |
143 | clear_buffer_ordered(bh); | |
818d276c | 144 | |
470decc6 DK |
145 | /* is it possible for another commit to fail at roughly |
146 | * the same time as this one? If so, we don't want to | |
147 | * trust the barrier flag in the super, but instead want | |
148 | * to remember if we sent a barrier request | |
149 | */ | |
150 | if (ret == -EOPNOTSUPP && barrier_done) { | |
470decc6 | 151 | printk(KERN_WARNING |
05496769 TT |
152 | "JBD: barrier-based sync failed on %s - " |
153 | "disabling barriers\n", journal->j_devname); | |
470decc6 | 154 | spin_lock(&journal->j_state_lock); |
f7f4bccb | 155 | journal->j_flags &= ~JBD2_BARRIER; |
470decc6 DK |
156 | spin_unlock(&journal->j_state_lock); |
157 | ||
158 | /* And try again, without the barrier */ | |
034772b0 | 159 | lock_buffer(bh); |
470decc6 | 160 | set_buffer_uptodate(bh); |
45a90bfd | 161 | clear_buffer_dirty(bh); |
40a1984d | 162 | ret = submit_bh(WRITE_SYNC, bh); |
470decc6 | 163 | } |
818d276c GS |
164 | *cbh = bh; |
165 | return ret; | |
166 | } | |
167 | ||
168 | /* | |
169 | * This function along with journal_submit_commit_record | |
170 | * allows to write the commit record asynchronously. | |
171 | */ | |
fd98496f TT |
172 | static int journal_wait_on_commit_record(journal_t *journal, |
173 | struct buffer_head *bh) | |
818d276c GS |
174 | { |
175 | int ret = 0; | |
176 | ||
fd98496f | 177 | retry: |
818d276c GS |
178 | clear_buffer_dirty(bh); |
179 | wait_on_buffer(bh); | |
fd98496f TT |
180 | if (buffer_eopnotsupp(bh) && (journal->j_flags & JBD2_BARRIER)) { |
181 | printk(KERN_WARNING | |
182 | "JBD2: wait_on_commit_record: sync failed on %s - " | |
183 | "disabling barriers\n", journal->j_devname); | |
184 | spin_lock(&journal->j_state_lock); | |
185 | journal->j_flags &= ~JBD2_BARRIER; | |
186 | spin_unlock(&journal->j_state_lock); | |
187 | ||
188 | lock_buffer(bh); | |
189 | clear_buffer_dirty(bh); | |
190 | set_buffer_uptodate(bh); | |
191 | bh->b_end_io = journal_end_buffer_io_sync; | |
192 | ||
193 | ret = submit_bh(WRITE_SYNC, bh); | |
194 | if (ret) { | |
195 | unlock_buffer(bh); | |
196 | return ret; | |
197 | } | |
198 | goto retry; | |
199 | } | |
470decc6 | 200 | |
818d276c GS |
201 | if (unlikely(!buffer_uptodate(bh))) |
202 | ret = -EIO; | |
203 | put_bh(bh); /* One for getblk() */ | |
204 | jbd2_journal_put_journal_head(bh2jh(bh)); | |
205 | ||
206 | return ret; | |
470decc6 DK |
207 | } |
208 | ||
cd1aac32 AK |
209 | /* |
210 | * write the filemap data using writepage() address_space_operations. | |
211 | * We don't do block allocation here even for delalloc. We don't | |
212 | * use writepages() because with dealyed allocation we may be doing | |
213 | * block allocation in writepages(). | |
214 | */ | |
215 | static int journal_submit_inode_data_buffers(struct address_space *mapping) | |
216 | { | |
217 | int ret; | |
218 | struct writeback_control wbc = { | |
219 | .sync_mode = WB_SYNC_ALL, | |
220 | .nr_to_write = mapping->nrpages * 2, | |
221 | .range_start = 0, | |
222 | .range_end = i_size_read(mapping->host), | |
223 | .for_writepages = 1, | |
224 | }; | |
225 | ||
226 | ret = generic_writepages(mapping, &wbc); | |
227 | return ret; | |
228 | } | |
229 | ||
c851ed54 JK |
230 | /* |
231 | * Submit all the data buffers of inode associated with the transaction to | |
232 | * disk. | |
233 | * | |
234 | * We are in a committing transaction. Therefore no new inode can be added to | |
235 | * our inode list. We use JI_COMMIT_RUNNING flag to protect inode we currently | |
236 | * operate on from being released while we write out pages. | |
237 | */ | |
cd1aac32 | 238 | static int journal_submit_data_buffers(journal_t *journal, |
c851ed54 JK |
239 | transaction_t *commit_transaction) |
240 | { | |
241 | struct jbd2_inode *jinode; | |
242 | int err, ret = 0; | |
243 | struct address_space *mapping; | |
244 | ||
245 | spin_lock(&journal->j_list_lock); | |
246 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { | |
247 | mapping = jinode->i_vfs_inode->i_mapping; | |
248 | jinode->i_flags |= JI_COMMIT_RUNNING; | |
249 | spin_unlock(&journal->j_list_lock); | |
cd1aac32 AK |
250 | /* |
251 | * submit the inode data buffers. We use writepage | |
252 | * instead of writepages. Because writepages can do | |
253 | * block allocation with delalloc. We need to write | |
254 | * only allocated blocks here. | |
255 | */ | |
256 | err = journal_submit_inode_data_buffers(mapping); | |
c851ed54 JK |
257 | if (!ret) |
258 | ret = err; | |
259 | spin_lock(&journal->j_list_lock); | |
260 | J_ASSERT(jinode->i_transaction == commit_transaction); | |
261 | jinode->i_flags &= ~JI_COMMIT_RUNNING; | |
262 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); | |
263 | } | |
264 | spin_unlock(&journal->j_list_lock); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Wait for data submitted for writeout, refile inodes to proper | |
270 | * transaction if needed. | |
271 | * | |
272 | */ | |
273 | static int journal_finish_inode_data_buffers(journal_t *journal, | |
274 | transaction_t *commit_transaction) | |
275 | { | |
276 | struct jbd2_inode *jinode, *next_i; | |
277 | int err, ret = 0; | |
278 | ||
cd1aac32 | 279 | /* For locking, see the comment in journal_submit_data_buffers() */ |
c851ed54 JK |
280 | spin_lock(&journal->j_list_lock); |
281 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { | |
282 | jinode->i_flags |= JI_COMMIT_RUNNING; | |
283 | spin_unlock(&journal->j_list_lock); | |
284 | err = filemap_fdatawait(jinode->i_vfs_inode->i_mapping); | |
e9e34f4e HK |
285 | if (err) { |
286 | /* | |
287 | * Because AS_EIO is cleared by | |
288 | * wait_on_page_writeback_range(), set it again so | |
289 | * that user process can get -EIO from fsync(). | |
290 | */ | |
291 | set_bit(AS_EIO, | |
292 | &jinode->i_vfs_inode->i_mapping->flags); | |
293 | ||
294 | if (!ret) | |
295 | ret = err; | |
296 | } | |
c851ed54 JK |
297 | spin_lock(&journal->j_list_lock); |
298 | jinode->i_flags &= ~JI_COMMIT_RUNNING; | |
299 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); | |
300 | } | |
301 | ||
302 | /* Now refile inode to proper lists */ | |
303 | list_for_each_entry_safe(jinode, next_i, | |
304 | &commit_transaction->t_inode_list, i_list) { | |
305 | list_del(&jinode->i_list); | |
306 | if (jinode->i_next_transaction) { | |
307 | jinode->i_transaction = jinode->i_next_transaction; | |
308 | jinode->i_next_transaction = NULL; | |
309 | list_add(&jinode->i_list, | |
310 | &jinode->i_transaction->t_inode_list); | |
311 | } else { | |
312 | jinode->i_transaction = NULL; | |
313 | } | |
314 | } | |
315 | spin_unlock(&journal->j_list_lock); | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
818d276c GS |
320 | static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh) |
321 | { | |
322 | struct page *page = bh->b_page; | |
323 | char *addr; | |
324 | __u32 checksum; | |
325 | ||
326 | addr = kmap_atomic(page, KM_USER0); | |
327 | checksum = crc32_be(crc32_sum, | |
328 | (void *)(addr + offset_in_page(bh->b_data)), bh->b_size); | |
329 | kunmap_atomic(addr, KM_USER0); | |
330 | ||
331 | return checksum; | |
332 | } | |
333 | ||
334 | static void write_tag_block(int tag_bytes, journal_block_tag_t *tag, | |
18eba7aa | 335 | unsigned long long block) |
b517bea1 ZB |
336 | { |
337 | tag->t_blocknr = cpu_to_be32(block & (u32)~0); | |
cd02ff0b | 338 | if (tag_bytes > JBD2_TAG_SIZE32) |
b517bea1 ZB |
339 | tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); |
340 | } | |
341 | ||
470decc6 | 342 | /* |
f7f4bccb | 343 | * jbd2_journal_commit_transaction |
470decc6 DK |
344 | * |
345 | * The primary function for committing a transaction to the log. This | |
346 | * function is called by the journal thread to begin a complete commit. | |
347 | */ | |
f7f4bccb | 348 | void jbd2_journal_commit_transaction(journal_t *journal) |
470decc6 | 349 | { |
8e85fb3f | 350 | struct transaction_stats_s stats; |
470decc6 DK |
351 | transaction_t *commit_transaction; |
352 | struct journal_head *jh, *new_jh, *descriptor; | |
353 | struct buffer_head **wbuf = journal->j_wbuf; | |
354 | int bufs; | |
355 | int flags; | |
356 | int err; | |
18eba7aa | 357 | unsigned long long blocknr; |
e07f7183 JB |
358 | ktime_t start_time; |
359 | u64 commit_time; | |
470decc6 DK |
360 | char *tagp = NULL; |
361 | journal_header_t *header; | |
362 | journal_block_tag_t *tag = NULL; | |
363 | int space_left = 0; | |
364 | int first_tag = 0; | |
365 | int tag_flag; | |
fb68407b | 366 | int i, to_free = 0; |
b517bea1 | 367 | int tag_bytes = journal_tag_bytes(journal); |
818d276c GS |
368 | struct buffer_head *cbh = NULL; /* For transactional checksums */ |
369 | __u32 crc32_sum = ~0; | |
470decc6 DK |
370 | |
371 | /* | |
372 | * First job: lock down the current transaction and wait for | |
373 | * all outstanding updates to complete. | |
374 | */ | |
375 | ||
376 | #ifdef COMMIT_STATS | |
377 | spin_lock(&journal->j_list_lock); | |
378 | summarise_journal_usage(journal); | |
379 | spin_unlock(&journal->j_list_lock); | |
380 | #endif | |
381 | ||
f7f4bccb MC |
382 | /* Do we need to erase the effects of a prior jbd2_journal_flush? */ |
383 | if (journal->j_flags & JBD2_FLUSHED) { | |
470decc6 | 384 | jbd_debug(3, "super block updated\n"); |
f7f4bccb | 385 | jbd2_journal_update_superblock(journal, 1); |
470decc6 DK |
386 | } else { |
387 | jbd_debug(3, "superblock not updated\n"); | |
388 | } | |
389 | ||
390 | J_ASSERT(journal->j_running_transaction != NULL); | |
391 | J_ASSERT(journal->j_committing_transaction == NULL); | |
392 | ||
393 | commit_transaction = journal->j_running_transaction; | |
394 | J_ASSERT(commit_transaction->t_state == T_RUNNING); | |
395 | ||
ede86cc4 TT |
396 | trace_mark(jbd2_start_commit, "dev %s transaction %d", |
397 | journal->j_devname, commit_transaction->t_tid); | |
470decc6 DK |
398 | jbd_debug(1, "JBD: starting commit of transaction %d\n", |
399 | commit_transaction->t_tid); | |
400 | ||
401 | spin_lock(&journal->j_state_lock); | |
402 | commit_transaction->t_state = T_LOCKED; | |
403 | ||
8e85fb3f JL |
404 | stats.u.run.rs_wait = commit_transaction->t_max_wait; |
405 | stats.u.run.rs_locked = jiffies; | |
406 | stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, | |
407 | stats.u.run.rs_locked); | |
408 | ||
470decc6 DK |
409 | spin_lock(&commit_transaction->t_handle_lock); |
410 | while (commit_transaction->t_updates) { | |
411 | DEFINE_WAIT(wait); | |
412 | ||
413 | prepare_to_wait(&journal->j_wait_updates, &wait, | |
414 | TASK_UNINTERRUPTIBLE); | |
415 | if (commit_transaction->t_updates) { | |
416 | spin_unlock(&commit_transaction->t_handle_lock); | |
417 | spin_unlock(&journal->j_state_lock); | |
418 | schedule(); | |
419 | spin_lock(&journal->j_state_lock); | |
420 | spin_lock(&commit_transaction->t_handle_lock); | |
421 | } | |
422 | finish_wait(&journal->j_wait_updates, &wait); | |
423 | } | |
424 | spin_unlock(&commit_transaction->t_handle_lock); | |
425 | ||
426 | J_ASSERT (commit_transaction->t_outstanding_credits <= | |
427 | journal->j_max_transaction_buffers); | |
428 | ||
429 | /* | |
430 | * First thing we are allowed to do is to discard any remaining | |
431 | * BJ_Reserved buffers. Note, it is _not_ permissible to assume | |
432 | * that there are no such buffers: if a large filesystem | |
433 | * operation like a truncate needs to split itself over multiple | |
f7f4bccb | 434 | * transactions, then it may try to do a jbd2_journal_restart() while |
470decc6 DK |
435 | * there are still BJ_Reserved buffers outstanding. These must |
436 | * be released cleanly from the current transaction. | |
437 | * | |
438 | * In this case, the filesystem must still reserve write access | |
439 | * again before modifying the buffer in the new transaction, but | |
440 | * we do not require it to remember exactly which old buffers it | |
441 | * has reserved. This is consistent with the existing behaviour | |
f7f4bccb | 442 | * that multiple jbd2_journal_get_write_access() calls to the same |
470decc6 DK |
443 | * buffer are perfectly permissable. |
444 | */ | |
445 | while (commit_transaction->t_reserved_list) { | |
446 | jh = commit_transaction->t_reserved_list; | |
447 | JBUFFER_TRACE(jh, "reserved, unused: refile"); | |
448 | /* | |
f7f4bccb | 449 | * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may |
470decc6 DK |
450 | * leave undo-committed data. |
451 | */ | |
452 | if (jh->b_committed_data) { | |
453 | struct buffer_head *bh = jh2bh(jh); | |
454 | ||
455 | jbd_lock_bh_state(bh); | |
af1e76d6 | 456 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
457 | jh->b_committed_data = NULL; |
458 | jbd_unlock_bh_state(bh); | |
459 | } | |
f7f4bccb | 460 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
461 | } |
462 | ||
463 | /* | |
464 | * Now try to drop any written-back buffers from the journal's | |
465 | * checkpoint lists. We do this *before* commit because it potentially | |
466 | * frees some memory | |
467 | */ | |
468 | spin_lock(&journal->j_list_lock); | |
f7f4bccb | 469 | __jbd2_journal_clean_checkpoint_list(journal); |
470decc6 DK |
470 | spin_unlock(&journal->j_list_lock); |
471 | ||
472 | jbd_debug (3, "JBD: commit phase 1\n"); | |
473 | ||
474 | /* | |
475 | * Switch to a new revoke table. | |
476 | */ | |
f7f4bccb | 477 | jbd2_journal_switch_revoke_table(journal); |
470decc6 | 478 | |
8e85fb3f JL |
479 | stats.u.run.rs_flushing = jiffies; |
480 | stats.u.run.rs_locked = jbd2_time_diff(stats.u.run.rs_locked, | |
481 | stats.u.run.rs_flushing); | |
482 | ||
470decc6 DK |
483 | commit_transaction->t_state = T_FLUSH; |
484 | journal->j_committing_transaction = commit_transaction; | |
485 | journal->j_running_transaction = NULL; | |
e07f7183 | 486 | start_time = ktime_get(); |
470decc6 DK |
487 | commit_transaction->t_log_start = journal->j_head; |
488 | wake_up(&journal->j_wait_transaction_locked); | |
489 | spin_unlock(&journal->j_state_lock); | |
490 | ||
491 | jbd_debug (3, "JBD: commit phase 2\n"); | |
492 | ||
470decc6 DK |
493 | /* |
494 | * Now start flushing things to disk, in the order they appear | |
495 | * on the transaction lists. Data blocks go first. | |
496 | */ | |
cd1aac32 | 497 | err = journal_submit_data_buffers(journal, commit_transaction); |
470decc6 | 498 | if (err) |
a7fa2baf | 499 | jbd2_journal_abort(journal, err); |
470decc6 | 500 | |
f7f4bccb | 501 | jbd2_journal_write_revoke_records(journal, commit_transaction); |
470decc6 DK |
502 | |
503 | jbd_debug(3, "JBD: commit phase 2\n"); | |
504 | ||
470decc6 DK |
505 | /* |
506 | * Way to go: we have now written out all of the data for a | |
507 | * transaction! Now comes the tricky part: we need to write out | |
508 | * metadata. Loop over the transaction's entire buffer list: | |
509 | */ | |
02c471cb | 510 | spin_lock(&journal->j_state_lock); |
470decc6 | 511 | commit_transaction->t_state = T_COMMIT; |
02c471cb | 512 | spin_unlock(&journal->j_state_lock); |
470decc6 | 513 | |
8e85fb3f JL |
514 | stats.u.run.rs_logging = jiffies; |
515 | stats.u.run.rs_flushing = jbd2_time_diff(stats.u.run.rs_flushing, | |
516 | stats.u.run.rs_logging); | |
517 | stats.u.run.rs_blocks = commit_transaction->t_outstanding_credits; | |
518 | stats.u.run.rs_blocks_logged = 0; | |
519 | ||
1dfc3220 JB |
520 | J_ASSERT(commit_transaction->t_nr_buffers <= |
521 | commit_transaction->t_outstanding_credits); | |
522 | ||
87c89c23 | 523 | err = 0; |
470decc6 DK |
524 | descriptor = NULL; |
525 | bufs = 0; | |
526 | while (commit_transaction->t_buffers) { | |
527 | ||
528 | /* Find the next buffer to be journaled... */ | |
529 | ||
530 | jh = commit_transaction->t_buffers; | |
531 | ||
532 | /* If we're in abort mode, we just un-journal the buffer and | |
7ad7445f | 533 | release it. */ |
470decc6 DK |
534 | |
535 | if (is_journal_aborted(journal)) { | |
7ad7445f | 536 | clear_buffer_jbddirty(jh2bh(jh)); |
470decc6 | 537 | JBUFFER_TRACE(jh, "journal is aborting: refile"); |
e06c8227 JB |
538 | jbd2_buffer_abort_trigger(jh, |
539 | jh->b_frozen_data ? | |
540 | jh->b_frozen_triggers : | |
541 | jh->b_triggers); | |
f7f4bccb | 542 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
543 | /* If that was the last one, we need to clean up |
544 | * any descriptor buffers which may have been | |
545 | * already allocated, even if we are now | |
546 | * aborting. */ | |
547 | if (!commit_transaction->t_buffers) | |
548 | goto start_journal_io; | |
549 | continue; | |
550 | } | |
551 | ||
552 | /* Make sure we have a descriptor block in which to | |
553 | record the metadata buffer. */ | |
554 | ||
555 | if (!descriptor) { | |
556 | struct buffer_head *bh; | |
557 | ||
558 | J_ASSERT (bufs == 0); | |
559 | ||
560 | jbd_debug(4, "JBD: get descriptor\n"); | |
561 | ||
f7f4bccb | 562 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 | 563 | if (!descriptor) { |
a7fa2baf | 564 | jbd2_journal_abort(journal, -EIO); |
470decc6 DK |
565 | continue; |
566 | } | |
567 | ||
568 | bh = jh2bh(descriptor); | |
569 | jbd_debug(4, "JBD: got buffer %llu (%p)\n", | |
570 | (unsigned long long)bh->b_blocknr, bh->b_data); | |
571 | header = (journal_header_t *)&bh->b_data[0]; | |
f7f4bccb MC |
572 | header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
573 | header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); | |
470decc6 DK |
574 | header->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
575 | ||
576 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
577 | space_left = bh->b_size - sizeof(journal_header_t); | |
578 | first_tag = 1; | |
579 | set_buffer_jwrite(bh); | |
580 | set_buffer_dirty(bh); | |
581 | wbuf[bufs++] = bh; | |
582 | ||
583 | /* Record it so that we can wait for IO | |
584 | completion later */ | |
585 | BUFFER_TRACE(bh, "ph3: file as descriptor"); | |
f7f4bccb | 586 | jbd2_journal_file_buffer(descriptor, commit_transaction, |
470decc6 DK |
587 | BJ_LogCtl); |
588 | } | |
589 | ||
590 | /* Where is the buffer to be written? */ | |
591 | ||
f7f4bccb | 592 | err = jbd2_journal_next_log_block(journal, &blocknr); |
470decc6 DK |
593 | /* If the block mapping failed, just abandon the buffer |
594 | and repeat this loop: we'll fall into the | |
595 | refile-on-abort condition above. */ | |
596 | if (err) { | |
a7fa2baf | 597 | jbd2_journal_abort(journal, err); |
470decc6 DK |
598 | continue; |
599 | } | |
600 | ||
601 | /* | |
602 | * start_this_handle() uses t_outstanding_credits to determine | |
603 | * the free space in the log, but this counter is changed | |
f7f4bccb | 604 | * by jbd2_journal_next_log_block() also. |
470decc6 DK |
605 | */ |
606 | commit_transaction->t_outstanding_credits--; | |
607 | ||
608 | /* Bump b_count to prevent truncate from stumbling over | |
609 | the shadowed buffer! @@@ This can go if we ever get | |
610 | rid of the BJ_IO/BJ_Shadow pairing of buffers. */ | |
611 | atomic_inc(&jh2bh(jh)->b_count); | |
612 | ||
613 | /* Make a temporary IO buffer with which to write it out | |
614 | (this will requeue both the metadata buffer and the | |
615 | temporary IO buffer). new_bh goes on BJ_IO*/ | |
616 | ||
617 | set_bit(BH_JWrite, &jh2bh(jh)->b_state); | |
618 | /* | |
f7f4bccb | 619 | * akpm: jbd2_journal_write_metadata_buffer() sets |
470decc6 DK |
620 | * new_bh->b_transaction to commit_transaction. |
621 | * We need to clean this up before we release new_bh | |
622 | * (which is of type BJ_IO) | |
623 | */ | |
624 | JBUFFER_TRACE(jh, "ph3: write metadata"); | |
f7f4bccb | 625 | flags = jbd2_journal_write_metadata_buffer(commit_transaction, |
470decc6 DK |
626 | jh, &new_jh, blocknr); |
627 | set_bit(BH_JWrite, &jh2bh(new_jh)->b_state); | |
628 | wbuf[bufs++] = jh2bh(new_jh); | |
629 | ||
630 | /* Record the new block's tag in the current descriptor | |
631 | buffer */ | |
632 | ||
633 | tag_flag = 0; | |
634 | if (flags & 1) | |
f7f4bccb | 635 | tag_flag |= JBD2_FLAG_ESCAPE; |
470decc6 | 636 | if (!first_tag) |
f7f4bccb | 637 | tag_flag |= JBD2_FLAG_SAME_UUID; |
470decc6 DK |
638 | |
639 | tag = (journal_block_tag_t *) tagp; | |
b517bea1 | 640 | write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr); |
470decc6 | 641 | tag->t_flags = cpu_to_be32(tag_flag); |
b517bea1 ZB |
642 | tagp += tag_bytes; |
643 | space_left -= tag_bytes; | |
470decc6 DK |
644 | |
645 | if (first_tag) { | |
646 | memcpy (tagp, journal->j_uuid, 16); | |
647 | tagp += 16; | |
648 | space_left -= 16; | |
649 | first_tag = 0; | |
650 | } | |
651 | ||
652 | /* If there's no more to do, or if the descriptor is full, | |
653 | let the IO rip! */ | |
654 | ||
655 | if (bufs == journal->j_wbufsize || | |
656 | commit_transaction->t_buffers == NULL || | |
b517bea1 | 657 | space_left < tag_bytes + 16) { |
470decc6 DK |
658 | |
659 | jbd_debug(4, "JBD: Submit %d IOs\n", bufs); | |
660 | ||
661 | /* Write an end-of-descriptor marker before | |
662 | submitting the IOs. "tag" still points to | |
663 | the last tag we set up. */ | |
664 | ||
f7f4bccb | 665 | tag->t_flags |= cpu_to_be32(JBD2_FLAG_LAST_TAG); |
470decc6 DK |
666 | |
667 | start_journal_io: | |
668 | for (i = 0; i < bufs; i++) { | |
669 | struct buffer_head *bh = wbuf[i]; | |
818d276c GS |
670 | /* |
671 | * Compute checksum. | |
672 | */ | |
673 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
674 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
675 | crc32_sum = | |
676 | jbd2_checksum_data(crc32_sum, bh); | |
677 | } | |
678 | ||
470decc6 DK |
679 | lock_buffer(bh); |
680 | clear_buffer_dirty(bh); | |
681 | set_buffer_uptodate(bh); | |
682 | bh->b_end_io = journal_end_buffer_io_sync; | |
683 | submit_bh(WRITE, bh); | |
684 | } | |
685 | cond_resched(); | |
8e85fb3f | 686 | stats.u.run.rs_blocks_logged += bufs; |
470decc6 DK |
687 | |
688 | /* Force a new descriptor to be generated next | |
689 | time round the loop. */ | |
690 | descriptor = NULL; | |
691 | bufs = 0; | |
692 | } | |
693 | } | |
694 | ||
818d276c GS |
695 | /* Done it all: now write the commit record asynchronously. */ |
696 | ||
697 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, | |
698 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
699 | err = journal_submit_commit_record(journal, commit_transaction, | |
700 | &cbh, crc32_sum); | |
701 | if (err) | |
702 | __jbd2_journal_abort_hard(journal); | |
818d276c GS |
703 | } |
704 | ||
c851ed54 JK |
705 | /* |
706 | * This is the right place to wait for data buffers both for ASYNC | |
707 | * and !ASYNC commit. If commit is ASYNC, we need to wait only after | |
708 | * the commit block went to disk (which happens above). If commit is | |
709 | * SYNC, we need to wait for data buffers before we start writing | |
710 | * commit block, which happens below in such setting. | |
711 | */ | |
712 | err = journal_finish_inode_data_buffers(journal, commit_transaction); | |
e9e34f4e | 713 | if (err) { |
e9e34f4e HK |
714 | printk(KERN_WARNING |
715 | "JBD2: Detected IO errors while flushing file data " | |
05496769 | 716 | "on %s\n", journal->j_devname); |
5bf5683a HK |
717 | if (journal->j_flags & JBD2_ABORT_ON_SYNCDATA_ERR) |
718 | jbd2_journal_abort(journal, err); | |
e9e34f4e HK |
719 | err = 0; |
720 | } | |
c851ed54 | 721 | |
470decc6 DK |
722 | /* Lo and behold: we have just managed to send a transaction to |
723 | the log. Before we can commit it, wait for the IO so far to | |
724 | complete. Control buffers being written are on the | |
725 | transaction's t_log_list queue, and metadata buffers are on | |
726 | the t_iobuf_list queue. | |
727 | ||
728 | Wait for the buffers in reverse order. That way we are | |
729 | less likely to be woken up until all IOs have completed, and | |
730 | so we incur less scheduling load. | |
731 | */ | |
732 | ||
87c89c23 | 733 | jbd_debug(3, "JBD: commit phase 3\n"); |
470decc6 DK |
734 | |
735 | /* | |
736 | * akpm: these are BJ_IO, and j_list_lock is not needed. | |
737 | * See __journal_try_to_free_buffer. | |
738 | */ | |
739 | wait_for_iobuf: | |
740 | while (commit_transaction->t_iobuf_list != NULL) { | |
741 | struct buffer_head *bh; | |
742 | ||
743 | jh = commit_transaction->t_iobuf_list->b_tprev; | |
744 | bh = jh2bh(jh); | |
745 | if (buffer_locked(bh)) { | |
746 | wait_on_buffer(bh); | |
747 | goto wait_for_iobuf; | |
748 | } | |
749 | if (cond_resched()) | |
750 | goto wait_for_iobuf; | |
751 | ||
752 | if (unlikely(!buffer_uptodate(bh))) | |
753 | err = -EIO; | |
754 | ||
755 | clear_buffer_jwrite(bh); | |
756 | ||
757 | JBUFFER_TRACE(jh, "ph4: unfile after journal write"); | |
f7f4bccb | 758 | jbd2_journal_unfile_buffer(journal, jh); |
470decc6 DK |
759 | |
760 | /* | |
761 | * ->t_iobuf_list should contain only dummy buffer_heads | |
f7f4bccb | 762 | * which were created by jbd2_journal_write_metadata_buffer(). |
470decc6 DK |
763 | */ |
764 | BUFFER_TRACE(bh, "dumping temporary bh"); | |
f7f4bccb | 765 | jbd2_journal_put_journal_head(jh); |
470decc6 DK |
766 | __brelse(bh); |
767 | J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0); | |
768 | free_buffer_head(bh); | |
769 | ||
770 | /* We also have to unlock and free the corresponding | |
771 | shadowed buffer */ | |
772 | jh = commit_transaction->t_shadow_list->b_tprev; | |
773 | bh = jh2bh(jh); | |
774 | clear_bit(BH_JWrite, &bh->b_state); | |
775 | J_ASSERT_BH(bh, buffer_jbddirty(bh)); | |
776 | ||
777 | /* The metadata is now released for reuse, but we need | |
778 | to remember it against this transaction so that when | |
779 | we finally commit, we can do any checkpointing | |
780 | required. */ | |
781 | JBUFFER_TRACE(jh, "file as BJ_Forget"); | |
f7f4bccb | 782 | jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget); |
470decc6 DK |
783 | /* Wake up any transactions which were waiting for this |
784 | IO to complete */ | |
785 | wake_up_bit(&bh->b_state, BH_Unshadow); | |
786 | JBUFFER_TRACE(jh, "brelse shadowed buffer"); | |
787 | __brelse(bh); | |
788 | } | |
789 | ||
790 | J_ASSERT (commit_transaction->t_shadow_list == NULL); | |
791 | ||
87c89c23 | 792 | jbd_debug(3, "JBD: commit phase 4\n"); |
470decc6 DK |
793 | |
794 | /* Here we wait for the revoke record and descriptor record buffers */ | |
795 | wait_for_ctlbuf: | |
796 | while (commit_transaction->t_log_list != NULL) { | |
797 | struct buffer_head *bh; | |
798 | ||
799 | jh = commit_transaction->t_log_list->b_tprev; | |
800 | bh = jh2bh(jh); | |
801 | if (buffer_locked(bh)) { | |
802 | wait_on_buffer(bh); | |
803 | goto wait_for_ctlbuf; | |
804 | } | |
805 | if (cond_resched()) | |
806 | goto wait_for_ctlbuf; | |
807 | ||
808 | if (unlikely(!buffer_uptodate(bh))) | |
809 | err = -EIO; | |
810 | ||
811 | BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile"); | |
812 | clear_buffer_jwrite(bh); | |
f7f4bccb MC |
813 | jbd2_journal_unfile_buffer(journal, jh); |
814 | jbd2_journal_put_journal_head(jh); | |
470decc6 DK |
815 | __brelse(bh); /* One for getblk */ |
816 | /* AKPM: bforget here */ | |
817 | } | |
818 | ||
77e841de HK |
819 | if (err) |
820 | jbd2_journal_abort(journal, err); | |
821 | ||
87c89c23 | 822 | jbd_debug(3, "JBD: commit phase 5\n"); |
470decc6 | 823 | |
818d276c GS |
824 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
825 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
826 | err = journal_submit_commit_record(journal, commit_transaction, | |
827 | &cbh, crc32_sum); | |
828 | if (err) | |
829 | __jbd2_journal_abort_hard(journal); | |
830 | } | |
b048d846 | 831 | if (!err && !is_journal_aborted(journal)) |
fd98496f | 832 | err = journal_wait_on_commit_record(journal, cbh); |
470decc6 DK |
833 | |
834 | if (err) | |
a7fa2baf | 835 | jbd2_journal_abort(journal, err); |
470decc6 DK |
836 | |
837 | /* End of a transaction! Finally, we can do checkpoint | |
838 | processing: any buffers committed as a result of this | |
839 | transaction can be removed from any checkpoint list it was on | |
840 | before. */ | |
841 | ||
87c89c23 | 842 | jbd_debug(3, "JBD: commit phase 6\n"); |
470decc6 | 843 | |
c851ed54 | 844 | J_ASSERT(list_empty(&commit_transaction->t_inode_list)); |
470decc6 DK |
845 | J_ASSERT(commit_transaction->t_buffers == NULL); |
846 | J_ASSERT(commit_transaction->t_checkpoint_list == NULL); | |
847 | J_ASSERT(commit_transaction->t_iobuf_list == NULL); | |
848 | J_ASSERT(commit_transaction->t_shadow_list == NULL); | |
849 | J_ASSERT(commit_transaction->t_log_list == NULL); | |
850 | ||
851 | restart_loop: | |
852 | /* | |
853 | * As there are other places (journal_unmap_buffer()) adding buffers | |
854 | * to this list we have to be careful and hold the j_list_lock. | |
855 | */ | |
856 | spin_lock(&journal->j_list_lock); | |
857 | while (commit_transaction->t_forget) { | |
858 | transaction_t *cp_transaction; | |
859 | struct buffer_head *bh; | |
860 | ||
861 | jh = commit_transaction->t_forget; | |
862 | spin_unlock(&journal->j_list_lock); | |
863 | bh = jh2bh(jh); | |
864 | jbd_lock_bh_state(bh); | |
865 | J_ASSERT_JH(jh, jh->b_transaction == commit_transaction || | |
866 | jh->b_transaction == journal->j_running_transaction); | |
867 | ||
868 | /* | |
869 | * If there is undo-protected committed data against | |
870 | * this buffer, then we can remove it now. If it is a | |
871 | * buffer needing such protection, the old frozen_data | |
872 | * field now points to a committed version of the | |
873 | * buffer, so rotate that field to the new committed | |
874 | * data. | |
875 | * | |
876 | * Otherwise, we can just throw away the frozen data now. | |
e06c8227 JB |
877 | * |
878 | * We also know that the frozen data has already fired | |
879 | * its triggers if they exist, so we can clear that too. | |
470decc6 DK |
880 | */ |
881 | if (jh->b_committed_data) { | |
af1e76d6 | 882 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
883 | jh->b_committed_data = NULL; |
884 | if (jh->b_frozen_data) { | |
885 | jh->b_committed_data = jh->b_frozen_data; | |
886 | jh->b_frozen_data = NULL; | |
e06c8227 | 887 | jh->b_frozen_triggers = NULL; |
470decc6 DK |
888 | } |
889 | } else if (jh->b_frozen_data) { | |
af1e76d6 | 890 | jbd2_free(jh->b_frozen_data, bh->b_size); |
470decc6 | 891 | jh->b_frozen_data = NULL; |
e06c8227 | 892 | jh->b_frozen_triggers = NULL; |
470decc6 DK |
893 | } |
894 | ||
895 | spin_lock(&journal->j_list_lock); | |
896 | cp_transaction = jh->b_cp_transaction; | |
897 | if (cp_transaction) { | |
898 | JBUFFER_TRACE(jh, "remove from old cp transaction"); | |
8e85fb3f | 899 | cp_transaction->t_chp_stats.cs_dropped++; |
f7f4bccb | 900 | __jbd2_journal_remove_checkpoint(jh); |
470decc6 DK |
901 | } |
902 | ||
903 | /* Only re-checkpoint the buffer_head if it is marked | |
904 | * dirty. If the buffer was added to the BJ_Forget list | |
f7f4bccb | 905 | * by jbd2_journal_forget, it may no longer be dirty and |
470decc6 DK |
906 | * there's no point in keeping a checkpoint record for |
907 | * it. */ | |
908 | ||
909 | /* A buffer which has been freed while still being | |
910 | * journaled by a previous transaction may end up still | |
911 | * being dirty here, but we want to avoid writing back | |
912 | * that buffer in the future now that the last use has | |
913 | * been committed. That's not only a performance gain, | |
914 | * it also stops aliasing problems if the buffer is left | |
915 | * behind for writeback and gets reallocated for another | |
916 | * use in a different page. */ | |
917 | if (buffer_freed(bh)) { | |
918 | clear_buffer_freed(bh); | |
919 | clear_buffer_jbddirty(bh); | |
920 | } | |
921 | ||
922 | if (buffer_jbddirty(bh)) { | |
923 | JBUFFER_TRACE(jh, "add to new checkpointing trans"); | |
f7f4bccb | 924 | __jbd2_journal_insert_checkpoint(jh, commit_transaction); |
7ad7445f HK |
925 | if (is_journal_aborted(journal)) |
926 | clear_buffer_jbddirty(bh); | |
470decc6 | 927 | JBUFFER_TRACE(jh, "refile for checkpoint writeback"); |
f7f4bccb | 928 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
929 | jbd_unlock_bh_state(bh); |
930 | } else { | |
931 | J_ASSERT_BH(bh, !buffer_dirty(bh)); | |
932 | /* The buffer on BJ_Forget list and not jbddirty means | |
933 | * it has been freed by this transaction and hence it | |
934 | * could not have been reallocated until this | |
935 | * transaction has committed. *BUT* it could be | |
936 | * reallocated once we have written all the data to | |
937 | * disk and before we process the buffer on BJ_Forget | |
938 | * list. */ | |
939 | JBUFFER_TRACE(jh, "refile or unfile freed buffer"); | |
f7f4bccb | 940 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
941 | if (!jh->b_transaction) { |
942 | jbd_unlock_bh_state(bh); | |
943 | /* needs a brelse */ | |
f7f4bccb | 944 | jbd2_journal_remove_journal_head(bh); |
470decc6 DK |
945 | release_buffer_page(bh); |
946 | } else | |
947 | jbd_unlock_bh_state(bh); | |
948 | } | |
949 | cond_resched_lock(&journal->j_list_lock); | |
950 | } | |
951 | spin_unlock(&journal->j_list_lock); | |
952 | /* | |
f5a7a6b0 JK |
953 | * This is a bit sleazy. We use j_list_lock to protect transition |
954 | * of a transaction into T_FINISHED state and calling | |
955 | * __jbd2_journal_drop_transaction(). Otherwise we could race with | |
956 | * other checkpointing code processing the transaction... | |
470decc6 DK |
957 | */ |
958 | spin_lock(&journal->j_state_lock); | |
959 | spin_lock(&journal->j_list_lock); | |
960 | /* | |
961 | * Now recheck if some buffers did not get attached to the transaction | |
962 | * while the lock was dropped... | |
963 | */ | |
964 | if (commit_transaction->t_forget) { | |
965 | spin_unlock(&journal->j_list_lock); | |
966 | spin_unlock(&journal->j_state_lock); | |
967 | goto restart_loop; | |
968 | } | |
969 | ||
970 | /* Done with this transaction! */ | |
971 | ||
87c89c23 | 972 | jbd_debug(3, "JBD: commit phase 7\n"); |
470decc6 DK |
973 | |
974 | J_ASSERT(commit_transaction->t_state == T_COMMIT); | |
975 | ||
8e85fb3f JL |
976 | commit_transaction->t_start = jiffies; |
977 | stats.u.run.rs_logging = jbd2_time_diff(stats.u.run.rs_logging, | |
978 | commit_transaction->t_start); | |
979 | ||
980 | /* | |
981 | * File the transaction for history | |
982 | */ | |
983 | stats.ts_type = JBD2_STATS_RUN; | |
984 | stats.ts_tid = commit_transaction->t_tid; | |
985 | stats.u.run.rs_handle_count = commit_transaction->t_handle_count; | |
986 | spin_lock(&journal->j_history_lock); | |
987 | memcpy(journal->j_history + journal->j_history_cur, &stats, | |
988 | sizeof(stats)); | |
989 | if (++journal->j_history_cur == journal->j_history_max) | |
990 | journal->j_history_cur = 0; | |
991 | ||
992 | /* | |
993 | * Calculate overall stats | |
994 | */ | |
995 | journal->j_stats.ts_tid++; | |
996 | journal->j_stats.u.run.rs_wait += stats.u.run.rs_wait; | |
997 | journal->j_stats.u.run.rs_running += stats.u.run.rs_running; | |
998 | journal->j_stats.u.run.rs_locked += stats.u.run.rs_locked; | |
999 | journal->j_stats.u.run.rs_flushing += stats.u.run.rs_flushing; | |
1000 | journal->j_stats.u.run.rs_logging += stats.u.run.rs_logging; | |
1001 | journal->j_stats.u.run.rs_handle_count += stats.u.run.rs_handle_count; | |
1002 | journal->j_stats.u.run.rs_blocks += stats.u.run.rs_blocks; | |
1003 | journal->j_stats.u.run.rs_blocks_logged += stats.u.run.rs_blocks_logged; | |
1004 | spin_unlock(&journal->j_history_lock); | |
1005 | ||
470decc6 DK |
1006 | commit_transaction->t_state = T_FINISHED; |
1007 | J_ASSERT(commit_transaction == journal->j_committing_transaction); | |
1008 | journal->j_commit_sequence = commit_transaction->t_tid; | |
1009 | journal->j_committing_transaction = NULL; | |
e07f7183 | 1010 | commit_time = ktime_to_ns(ktime_sub(ktime_get(), start_time)); |
470decc6 | 1011 | |
e07f7183 JB |
1012 | /* |
1013 | * weight the commit time higher than the average time so we don't | |
1014 | * react too strongly to vast changes in the commit time | |
1015 | */ | |
1016 | if (likely(journal->j_average_commit_time)) | |
1017 | journal->j_average_commit_time = (commit_time + | |
1018 | journal->j_average_commit_time*3) / 4; | |
1019 | else | |
1020 | journal->j_average_commit_time = commit_time; | |
470decc6 | 1021 | spin_unlock(&journal->j_state_lock); |
6c20ec85 | 1022 | |
f89b7795 JK |
1023 | if (commit_transaction->t_checkpoint_list == NULL && |
1024 | commit_transaction->t_checkpoint_io_list == NULL) { | |
f7f4bccb | 1025 | __jbd2_journal_drop_transaction(journal, commit_transaction); |
fb68407b | 1026 | to_free = 1; |
470decc6 DK |
1027 | } else { |
1028 | if (journal->j_checkpoint_transactions == NULL) { | |
1029 | journal->j_checkpoint_transactions = commit_transaction; | |
1030 | commit_transaction->t_cpnext = commit_transaction; | |
1031 | commit_transaction->t_cpprev = commit_transaction; | |
1032 | } else { | |
1033 | commit_transaction->t_cpnext = | |
1034 | journal->j_checkpoint_transactions; | |
1035 | commit_transaction->t_cpprev = | |
1036 | commit_transaction->t_cpnext->t_cpprev; | |
1037 | commit_transaction->t_cpnext->t_cpprev = | |
1038 | commit_transaction; | |
1039 | commit_transaction->t_cpprev->t_cpnext = | |
1040 | commit_transaction; | |
1041 | } | |
1042 | } | |
1043 | spin_unlock(&journal->j_list_lock); | |
1044 | ||
fb68407b AK |
1045 | if (journal->j_commit_callback) |
1046 | journal->j_commit_callback(journal, commit_transaction); | |
1047 | ||
ede86cc4 | 1048 | trace_mark(jbd2_end_commit, "dev %s transaction %d head %d", |
fb68407b | 1049 | journal->j_devname, commit_transaction->t_tid, |
ede86cc4 | 1050 | journal->j_tail_sequence); |
470decc6 DK |
1051 | jbd_debug(1, "JBD: commit %d complete, head %d\n", |
1052 | journal->j_commit_sequence, journal->j_tail_sequence); | |
fb68407b AK |
1053 | if (to_free) |
1054 | kfree(commit_transaction); | |
470decc6 DK |
1055 | |
1056 | wake_up(&journal->j_wait_done_commit); | |
1057 | } |