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Commit | Line | Data |
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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
da6dd40d | 4 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
7 | #include <linux/sched.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/spinlock.h> | |
10 | #include <linux/completion.h> | |
11 | #include <linux/buffer_head.h> | |
5c676f6d | 12 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 13 | #include <linux/crc32.h> |
c1696fb8 | 14 | #include <linux/crc32c.h> |
a25311c8 | 15 | #include <linux/delay.h> |
ec69b188 SW |
16 | #include <linux/kthread.h> |
17 | #include <linux/freezer.h> | |
254db57f | 18 | #include <linux/bio.h> |
885bceca | 19 | #include <linux/blkdev.h> |
4667a0ec | 20 | #include <linux/writeback.h> |
4a36d08d | 21 | #include <linux/list_sort.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "bmap.h" |
26 | #include "glock.h" | |
27 | #include "log.h" | |
28 | #include "lops.h" | |
29 | #include "meta_io.h" | |
5c676f6d | 30 | #include "util.h" |
71b86f56 | 31 | #include "dir.h" |
63997775 | 32 | #include "trace_gfs2.h" |
b839dada | 33 | #include "trans.h" |
b3b94faa | 34 | |
feed98a8 BP |
35 | static void gfs2_log_shutdown(struct gfs2_sbd *sdp); |
36 | ||
b3b94faa DT |
37 | /** |
38 | * gfs2_struct2blk - compute stuff | |
39 | * @sdp: the filesystem | |
40 | * @nstruct: the number of structures | |
b3b94faa DT |
41 | * |
42 | * Compute the number of log descriptor blocks needed to hold a certain number | |
43 | * of structures of a certain size. | |
44 | * | |
45 | * Returns: the number of blocks needed (minimum is always 1) | |
46 | */ | |
47 | ||
2e9eeaa1 | 48 | unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct) |
b3b94faa DT |
49 | { |
50 | unsigned int blks; | |
51 | unsigned int first, second; | |
52 | ||
6188e877 | 53 | /* The initial struct gfs2_log_descriptor block */ |
b3b94faa | 54 | blks = 1; |
2e9eeaa1 | 55 | first = sdp->sd_ldptrs; |
b3b94faa DT |
56 | |
57 | if (nstruct > first) { | |
6188e877 | 58 | /* Subsequent struct gfs2_meta_header blocks */ |
2e9eeaa1 | 59 | second = sdp->sd_inptrs; |
5c676f6d | 60 | blks += DIV_ROUND_UP(nstruct - first, second); |
b3b94faa DT |
61 | } |
62 | ||
63 | return blks; | |
64 | } | |
65 | ||
1e1a3d03 SW |
66 | /** |
67 | * gfs2_remove_from_ail - Remove an entry from the ail lists, updating counters | |
1e1a3d03 SW |
68 | * @bd: The gfs2_bufdata to remove |
69 | * | |
c618e87a | 70 | * The ail lock _must_ be held when calling this function |
1e1a3d03 SW |
71 | * |
72 | */ | |
73 | ||
68942870 | 74 | void gfs2_remove_from_ail(struct gfs2_bufdata *bd) |
1e1a3d03 | 75 | { |
16ca9412 | 76 | bd->bd_tr = NULL; |
1ad38c43 SW |
77 | list_del_init(&bd->bd_ail_st_list); |
78 | list_del_init(&bd->bd_ail_gl_list); | |
1e1a3d03 | 79 | atomic_dec(&bd->bd_gl->gl_ail_count); |
1e1a3d03 SW |
80 | brelse(bd->bd_bh); |
81 | } | |
82 | ||
ddacfaf7 | 83 | /** |
c551f66c LJ |
84 | * gfs2_ail1_start_one - Start I/O on a transaction |
85 | * @sdp: The superblock | |
4667a0ec | 86 | * @wbc: The writeback control structure |
c551f66c LJ |
87 | * @tr: The transaction to start I/O on |
88 | * @plug: The block plug currently active | |
ddacfaf7 SW |
89 | */ |
90 | ||
4f1de018 SW |
91 | static int gfs2_ail1_start_one(struct gfs2_sbd *sdp, |
92 | struct writeback_control *wbc, | |
17d77684 | 93 | struct gfs2_trans *tr, struct blk_plug *plug) |
d6a079e8 DC |
94 | __releases(&sdp->sd_ail_lock) |
95 | __acquires(&sdp->sd_ail_lock) | |
ddacfaf7 | 96 | { |
5ac048bb | 97 | struct gfs2_glock *gl = NULL; |
4667a0ec | 98 | struct address_space *mapping; |
ddacfaf7 SW |
99 | struct gfs2_bufdata *bd, *s; |
100 | struct buffer_head *bh; | |
b1676cbb | 101 | int ret = 0; |
ddacfaf7 | 102 | |
16ca9412 | 103 | list_for_each_entry_safe_reverse(bd, s, &tr->tr_ail1_list, bd_ail_st_list) { |
4667a0ec | 104 | bh = bd->bd_bh; |
ddacfaf7 | 105 | |
16ca9412 | 106 | gfs2_assert(sdp, bd->bd_tr == tr); |
ddacfaf7 | 107 | |
4667a0ec | 108 | if (!buffer_busy(bh)) { |
30fe70a8 BP |
109 | if (buffer_uptodate(bh)) { |
110 | list_move(&bd->bd_ail_st_list, | |
111 | &tr->tr_ail2_list); | |
112 | continue; | |
113 | } | |
036330c9 | 114 | if (!cmpxchg(&sdp->sd_log_error, 0, -EIO)) { |
4667a0ec | 115 | gfs2_io_error_bh(sdp, bh); |
69511080 | 116 | gfs2_withdraw_delayed(sdp); |
9e1a9ecd | 117 | } |
4667a0ec SW |
118 | } |
119 | ||
30fe70a8 BP |
120 | if (gfs2_withdrawn(sdp)) { |
121 | gfs2_remove_from_ail(bd); | |
122 | continue; | |
123 | } | |
4667a0ec SW |
124 | if (!buffer_dirty(bh)) |
125 | continue; | |
126 | if (gl == bd->bd_gl) | |
127 | continue; | |
128 | gl = bd->bd_gl; | |
16ca9412 | 129 | list_move(&bd->bd_ail_st_list, &tr->tr_ail1_list); |
4667a0ec | 130 | mapping = bh->b_page->mapping; |
4f1de018 SW |
131 | if (!mapping) |
132 | continue; | |
4667a0ec | 133 | spin_unlock(&sdp->sd_ail_lock); |
b1676cbb | 134 | ret = generic_writepages(mapping, wbc); |
17d77684 BP |
135 | if (need_resched()) { |
136 | blk_finish_plug(plug); | |
137 | cond_resched(); | |
138 | blk_start_plug(plug); | |
139 | } | |
4667a0ec | 140 | spin_lock(&sdp->sd_ail_lock); |
4e79e3f0 BP |
141 | if (ret == -ENODATA) /* if a jdata write into a new hole */ |
142 | ret = 0; /* ignore it */ | |
b1676cbb | 143 | if (ret || wbc->nr_to_write <= 0) |
4667a0ec | 144 | break; |
b1676cbb | 145 | return -EBUSY; |
4667a0ec | 146 | } |
4f1de018 | 147 | |
b1676cbb | 148 | return ret; |
4667a0ec | 149 | } |
ddacfaf7 | 150 | |
9592ea80 BP |
151 | static void dump_ail_list(struct gfs2_sbd *sdp) |
152 | { | |
153 | struct gfs2_trans *tr; | |
154 | struct gfs2_bufdata *bd; | |
155 | struct buffer_head *bh; | |
156 | ||
9592ea80 BP |
157 | list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) { |
158 | list_for_each_entry_reverse(bd, &tr->tr_ail1_list, | |
159 | bd_ail_st_list) { | |
160 | bh = bd->bd_bh; | |
161 | fs_err(sdp, "bd %p: blk:0x%llx bh=%p ", bd, | |
162 | (unsigned long long)bd->bd_blkno, bh); | |
163 | if (!bh) { | |
164 | fs_err(sdp, "\n"); | |
165 | continue; | |
166 | } | |
167 | fs_err(sdp, "0x%llx up2:%d dirt:%d lkd:%d req:%d " | |
168 | "map:%d new:%d ar:%d aw:%d delay:%d " | |
169 | "io err:%d unwritten:%d dfr:%d pin:%d esc:%d\n", | |
170 | (unsigned long long)bh->b_blocknr, | |
171 | buffer_uptodate(bh), buffer_dirty(bh), | |
172 | buffer_locked(bh), buffer_req(bh), | |
173 | buffer_mapped(bh), buffer_new(bh), | |
174 | buffer_async_read(bh), buffer_async_write(bh), | |
175 | buffer_delay(bh), buffer_write_io_error(bh), | |
176 | buffer_unwritten(bh), | |
177 | buffer_defer_completion(bh), | |
178 | buffer_pinned(bh), buffer_escaped(bh)); | |
179 | } | |
180 | } | |
181 | } | |
ddacfaf7 | 182 | |
4667a0ec SW |
183 | /** |
184 | * gfs2_ail1_flush - start writeback of some ail1 entries | |
185 | * @sdp: The super block | |
186 | * @wbc: The writeback control structure | |
187 | * | |
188 | * Writes back some ail1 entries, according to the limits in the | |
189 | * writeback control structure | |
190 | */ | |
ddacfaf7 | 191 | |
4667a0ec SW |
192 | void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc) |
193 | { | |
194 | struct list_head *head = &sdp->sd_ail1_list; | |
16ca9412 | 195 | struct gfs2_trans *tr; |
885bceca | 196 | struct blk_plug plug; |
75b46c43 | 197 | int ret; |
9592ea80 | 198 | unsigned long flush_start = jiffies; |
ddacfaf7 | 199 | |
c83ae9ca | 200 | trace_gfs2_ail_flush(sdp, wbc, 1); |
885bceca | 201 | blk_start_plug(&plug); |
4667a0ec | 202 | spin_lock(&sdp->sd_ail_lock); |
4f1de018 | 203 | restart: |
75b46c43 | 204 | ret = 0; |
9592ea80 | 205 | if (time_after(jiffies, flush_start + (HZ * 600))) { |
d5dc3d96 BP |
206 | fs_err(sdp, "Error: In %s for ten minutes! t=%d\n", |
207 | __func__, current->journal_info ? 1 : 0); | |
9592ea80 BP |
208 | dump_ail_list(sdp); |
209 | goto out; | |
210 | } | |
16ca9412 | 211 | list_for_each_entry_reverse(tr, head, tr_list) { |
4667a0ec | 212 | if (wbc->nr_to_write <= 0) |
ddacfaf7 | 213 | break; |
17d77684 | 214 | ret = gfs2_ail1_start_one(sdp, wbc, tr, &plug); |
b1676cbb BP |
215 | if (ret) { |
216 | if (ret == -EBUSY) | |
217 | goto restart; | |
218 | break; | |
219 | } | |
4667a0ec | 220 | } |
9592ea80 | 221 | out: |
4667a0ec | 222 | spin_unlock(&sdp->sd_ail_lock); |
885bceca | 223 | blk_finish_plug(&plug); |
49003128 BP |
224 | if (ret) { |
225 | gfs2_lm(sdp, "gfs2_ail1_start_one (generic_writepages) " | |
226 | "returned: %d\n", ret); | |
badb55ec | 227 | gfs2_withdraw(sdp); |
49003128 | 228 | } |
c83ae9ca | 229 | trace_gfs2_ail_flush(sdp, wbc, 0); |
4667a0ec SW |
230 | } |
231 | ||
232 | /** | |
233 | * gfs2_ail1_start - start writeback of all ail1 entries | |
234 | * @sdp: The superblock | |
235 | */ | |
236 | ||
237 | static void gfs2_ail1_start(struct gfs2_sbd *sdp) | |
238 | { | |
239 | struct writeback_control wbc = { | |
240 | .sync_mode = WB_SYNC_NONE, | |
241 | .nr_to_write = LONG_MAX, | |
242 | .range_start = 0, | |
243 | .range_end = LLONG_MAX, | |
244 | }; | |
245 | ||
246 | return gfs2_ail1_flush(sdp, &wbc); | |
ddacfaf7 SW |
247 | } |
248 | ||
5cb738b5 AG |
249 | static void gfs2_log_update_flush_tail(struct gfs2_sbd *sdp) |
250 | { | |
251 | unsigned int new_flush_tail = sdp->sd_log_head; | |
252 | struct gfs2_trans *tr; | |
253 | ||
254 | if (!list_empty(&sdp->sd_ail1_list)) { | |
255 | tr = list_last_entry(&sdp->sd_ail1_list, | |
256 | struct gfs2_trans, tr_list); | |
257 | new_flush_tail = tr->tr_first; | |
258 | } | |
259 | sdp->sd_log_flush_tail = new_flush_tail; | |
260 | } | |
261 | ||
262 | static void gfs2_log_update_head(struct gfs2_sbd *sdp) | |
263 | { | |
264 | unsigned int new_head = sdp->sd_log_flush_head; | |
265 | ||
266 | if (sdp->sd_log_flush_tail == sdp->sd_log_head) | |
267 | sdp->sd_log_flush_tail = new_head; | |
268 | sdp->sd_log_head = new_head; | |
269 | } | |
270 | ||
c551f66c | 271 | /* |
76fce654 AG |
272 | * gfs2_ail_empty_tr - empty one of the ail lists of a transaction |
273 | */ | |
274 | ||
275 | static void gfs2_ail_empty_tr(struct gfs2_sbd *sdp, struct gfs2_trans *tr, | |
276 | struct list_head *head) | |
277 | { | |
278 | struct gfs2_bufdata *bd; | |
279 | ||
280 | while (!list_empty(head)) { | |
281 | bd = list_first_entry(head, struct gfs2_bufdata, | |
282 | bd_ail_st_list); | |
283 | gfs2_assert(sdp, bd->bd_tr == tr); | |
284 | gfs2_remove_from_ail(bd); | |
285 | } | |
286 | } | |
287 | ||
ddacfaf7 SW |
288 | /** |
289 | * gfs2_ail1_empty_one - Check whether or not a trans in the AIL has been synced | |
290 | * @sdp: the filesystem | |
5e4c7632 BP |
291 | * @tr: the transaction |
292 | * @max_revokes: If nonzero, issue revokes for the bd items for written buffers | |
ddacfaf7 | 293 | * |
36c78309 | 294 | * returns: the transaction's count of remaining active items |
ddacfaf7 SW |
295 | */ |
296 | ||
36c78309 | 297 | static int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_trans *tr, |
5e4c7632 | 298 | int *max_revokes) |
ddacfaf7 SW |
299 | { |
300 | struct gfs2_bufdata *bd, *s; | |
301 | struct buffer_head *bh; | |
36c78309 | 302 | int active_count = 0; |
ddacfaf7 | 303 | |
16ca9412 | 304 | list_for_each_entry_safe_reverse(bd, s, &tr->tr_ail1_list, |
ddacfaf7 SW |
305 | bd_ail_st_list) { |
306 | bh = bd->bd_bh; | |
16ca9412 | 307 | gfs2_assert(sdp, bd->bd_tr == tr); |
036330c9 BP |
308 | /* |
309 | * If another process flagged an io error, e.g. writing to the | |
310 | * journal, error all other bhs and move them off the ail1 to | |
311 | * prevent a tight loop when unmount tries to flush ail1, | |
312 | * regardless of whether they're still busy. If no outside | |
313 | * errors were found and the buffer is busy, move to the next. | |
314 | * If the ail buffer is not busy and caught an error, flag it | |
315 | * for others. | |
316 | */ | |
36c78309 BP |
317 | if (!sdp->sd_log_error && buffer_busy(bh)) { |
318 | active_count++; | |
4667a0ec | 319 | continue; |
36c78309 | 320 | } |
b524abcc | 321 | if (!buffer_uptodate(bh) && |
036330c9 | 322 | !cmpxchg(&sdp->sd_log_error, 0, -EIO)) { |
ddacfaf7 | 323 | gfs2_io_error_bh(sdp, bh); |
69511080 | 324 | gfs2_withdraw_delayed(sdp); |
9e1a9ecd | 325 | } |
5e4c7632 BP |
326 | /* |
327 | * If we have space for revokes and the bd is no longer on any | |
328 | * buf list, we can just add a revoke for it immediately and | |
329 | * avoid having to put it on the ail2 list, where it would need | |
330 | * to be revoked later. | |
331 | */ | |
332 | if (*max_revokes && list_empty(&bd->bd_list)) { | |
333 | gfs2_add_revoke(sdp, bd); | |
334 | (*max_revokes)--; | |
335 | continue; | |
336 | } | |
16ca9412 | 337 | list_move(&bd->bd_ail_st_list, &tr->tr_ail2_list); |
ddacfaf7 | 338 | } |
36c78309 | 339 | return active_count; |
ddacfaf7 SW |
340 | } |
341 | ||
4667a0ec SW |
342 | /** |
343 | * gfs2_ail1_empty - Try to empty the ail1 lists | |
344 | * @sdp: The superblock | |
5e4c7632 | 345 | * @max_revokes: If non-zero, add revokes where appropriate |
4667a0ec SW |
346 | * |
347 | * Tries to empty the ail1 lists, starting with the oldest first | |
348 | */ | |
b3b94faa | 349 | |
5e4c7632 | 350 | static int gfs2_ail1_empty(struct gfs2_sbd *sdp, int max_revokes) |
b3b94faa | 351 | { |
16ca9412 | 352 | struct gfs2_trans *tr, *s; |
5d054964 | 353 | int oldest_tr = 1; |
b3b94faa DT |
354 | int ret; |
355 | ||
d6a079e8 | 356 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 | 357 | list_for_each_entry_safe_reverse(tr, s, &sdp->sd_ail1_list, tr_list) { |
36c78309 | 358 | if (!gfs2_ail1_empty_one(sdp, tr, &max_revokes) && oldest_tr) |
16ca9412 | 359 | list_move(&tr->tr_list, &sdp->sd_ail2_list); |
4667a0ec | 360 | else |
5d054964 | 361 | oldest_tr = 0; |
b3b94faa | 362 | } |
5cb738b5 | 363 | gfs2_log_update_flush_tail(sdp); |
b3b94faa | 364 | ret = list_empty(&sdp->sd_ail1_list); |
d6a079e8 | 365 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 366 | |
69511080 | 367 | if (test_bit(SDF_WITHDRAWING, &sdp->sd_flags)) { |
badb55ec AG |
368 | gfs2_lm(sdp, "fatal: I/O error(s)\n"); |
369 | gfs2_withdraw(sdp); | |
370 | } | |
9e1a9ecd | 371 | |
b3b94faa DT |
372 | return ret; |
373 | } | |
374 | ||
26b06a69 SW |
375 | static void gfs2_ail1_wait(struct gfs2_sbd *sdp) |
376 | { | |
16ca9412 | 377 | struct gfs2_trans *tr; |
26b06a69 SW |
378 | struct gfs2_bufdata *bd; |
379 | struct buffer_head *bh; | |
380 | ||
381 | spin_lock(&sdp->sd_ail_lock); | |
16ca9412 BM |
382 | list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) { |
383 | list_for_each_entry(bd, &tr->tr_ail1_list, bd_ail_st_list) { | |
26b06a69 SW |
384 | bh = bd->bd_bh; |
385 | if (!buffer_locked(bh)) | |
386 | continue; | |
387 | get_bh(bh); | |
388 | spin_unlock(&sdp->sd_ail_lock); | |
389 | wait_on_buffer(bh); | |
390 | brelse(bh); | |
391 | return; | |
392 | } | |
393 | } | |
394 | spin_unlock(&sdp->sd_ail_lock); | |
395 | } | |
ddacfaf7 | 396 | |
6e80674a | 397 | static void __ail2_empty(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
ddacfaf7 | 398 | { |
6e80674a AG |
399 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); |
400 | list_del(&tr->tr_list); | |
401 | gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list)); | |
402 | gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list)); | |
403 | gfs2_trans_free(sdp, tr); | |
ddacfaf7 SW |
404 | } |
405 | ||
b3b94faa DT |
406 | static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) |
407 | { | |
6e80674a | 408 | struct list_head *ail2_list = &sdp->sd_ail2_list; |
b3b94faa | 409 | unsigned int old_tail = sdp->sd_log_tail; |
6e80674a | 410 | struct gfs2_trans *tr, *safe; |
b3b94faa | 411 | |
d6a079e8 | 412 | spin_lock(&sdp->sd_ail_lock); |
6e80674a AG |
413 | if (old_tail <= new_tail) { |
414 | list_for_each_entry_safe(tr, safe, ail2_list, tr_list) { | |
415 | if (old_tail <= tr->tr_first && tr->tr_first < new_tail) | |
416 | __ail2_empty(sdp, tr); | |
417 | } | |
418 | } else { | |
419 | list_for_each_entry_safe(tr, safe, ail2_list, tr_list) { | |
420 | if (old_tail <= tr->tr_first || tr->tr_first < new_tail) | |
421 | __ail2_empty(sdp, tr); | |
422 | } | |
b3b94faa | 423 | } |
d6a079e8 | 424 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 425 | } |
b3b94faa | 426 | |
f3708fb5 AG |
427 | /** |
428 | * gfs2_log_is_empty - Check if the log is empty | |
429 | * @sdp: The GFS2 superblock | |
430 | */ | |
b3b94faa | 431 | |
f3708fb5 AG |
432 | bool gfs2_log_is_empty(struct gfs2_sbd *sdp) { |
433 | return atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks; | |
434 | } | |
435 | ||
2129b428 AG |
436 | static bool __gfs2_log_try_reserve_revokes(struct gfs2_sbd *sdp, unsigned int revokes) |
437 | { | |
438 | unsigned int available; | |
439 | ||
440 | available = atomic_read(&sdp->sd_log_revokes_available); | |
441 | while (available >= revokes) { | |
442 | if (atomic_try_cmpxchg(&sdp->sd_log_revokes_available, | |
443 | &available, available - revokes)) | |
444 | return true; | |
b3b94faa | 445 | } |
2129b428 AG |
446 | return false; |
447 | } | |
b3b94faa | 448 | |
2129b428 AG |
449 | /** |
450 | * gfs2_log_release_revokes - Release a given number of revokes | |
451 | * @sdp: The GFS2 superblock | |
452 | * @revokes: The number of revokes to release | |
453 | * | |
454 | * sdp->sd_log_flush_lock must be held. | |
455 | */ | |
456 | void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes) | |
457 | { | |
458 | if (revokes) | |
459 | atomic_add(revokes, &sdp->sd_log_revokes_available); | |
b3b94faa DT |
460 | } |
461 | ||
24972557 BM |
462 | /** |
463 | * gfs2_log_release - Release a given number of log blocks | |
464 | * @sdp: The GFS2 superblock | |
465 | * @blks: The number of blocks | |
466 | * | |
467 | */ | |
468 | ||
469 | void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks) | |
470 | { | |
24972557 BM |
471 | atomic_add(blks, &sdp->sd_log_blks_free); |
472 | trace_gfs2_log_blocks(sdp, blks); | |
473 | gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <= | |
474 | sdp->sd_jdesc->jd_blocks); | |
5ae8fff8 AG |
475 | if (atomic_read(&sdp->sd_log_blks_needed)) |
476 | wake_up(&sdp->sd_log_waitq); | |
24972557 BM |
477 | } |
478 | ||
b3b94faa | 479 | /** |
fe3e3976 AG |
480 | * __gfs2_log_try_reserve - Try to make a log reservation |
481 | * @sdp: The GFS2 superblock | |
482 | * @blks: The number of blocks to reserve | |
483 | * @taboo_blks: The number of blocks to leave free | |
484 | * | |
485 | * Try to do the same as __gfs2_log_reserve(), but fail if no more log | |
486 | * space is immediately available. | |
487 | */ | |
488 | static bool __gfs2_log_try_reserve(struct gfs2_sbd *sdp, unsigned int blks, | |
489 | unsigned int taboo_blks) | |
490 | { | |
491 | unsigned wanted = blks + taboo_blks; | |
492 | unsigned int free_blocks; | |
493 | ||
494 | free_blocks = atomic_read(&sdp->sd_log_blks_free); | |
495 | while (free_blocks >= wanted) { | |
496 | if (atomic_try_cmpxchg(&sdp->sd_log_blks_free, &free_blocks, | |
497 | free_blocks - blks)) { | |
498 | trace_gfs2_log_blocks(sdp, -blks); | |
499 | return true; | |
500 | } | |
501 | } | |
502 | return false; | |
503 | } | |
504 | ||
505 | /** | |
506 | * __gfs2_log_reserve - Make a log reservation | |
b3b94faa DT |
507 | * @sdp: The GFS2 superblock |
508 | * @blks: The number of blocks to reserve | |
fe3e3976 | 509 | * @taboo_blks: The number of blocks to leave free |
b3b94faa | 510 | * |
fe3e3976 AG |
511 | * @taboo_blks is set to 0 for logd, and to GFS2_LOG_FLUSH_MIN_BLOCKS |
512 | * for all other processes. This ensures that when the log is almost full, | |
513 | * logd will still be able to call gfs2_log_flush one more time without | |
514 | * blocking, which will advance the tail and make some more log space | |
515 | * available. | |
b004157a | 516 | * |
5e687eac BM |
517 | * We no longer flush the log here, instead we wake up logd to do that |
518 | * for us. To avoid the thundering herd and to ensure that we deal fairly | |
519 | * with queued waiters, we use an exclusive wait. This means that when we | |
520 | * get woken with enough journal space to get our reservation, we need to | |
521 | * wake the next waiter on the list. | |
b3b94faa DT |
522 | */ |
523 | ||
fe3e3976 AG |
524 | static void __gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks, |
525 | unsigned int taboo_blks) | |
b3b94faa | 526 | { |
fe3e3976 | 527 | unsigned wanted = blks + taboo_blks; |
5e687eac | 528 | unsigned int free_blocks; |
b3b94faa | 529 | |
f07b3520 | 530 | atomic_add(blks, &sdp->sd_log_blks_needed); |
5ae8fff8 AG |
531 | for (;;) { |
532 | if (current != sdp->sd_logd_process) | |
5e687eac | 533 | wake_up(&sdp->sd_logd_waitq); |
5ae8fff8 AG |
534 | io_wait_event(sdp->sd_log_waitq, |
535 | (free_blocks = atomic_read(&sdp->sd_log_blks_free), | |
536 | free_blocks >= wanted)); | |
537 | do { | |
538 | if (atomic_try_cmpxchg(&sdp->sd_log_blks_free, | |
539 | &free_blocks, | |
540 | free_blocks - blks)) | |
541 | goto reserved; | |
542 | } while (free_blocks >= wanted); | |
2e60d768 | 543 | } |
5e687eac | 544 | |
5ae8fff8 AG |
545 | reserved: |
546 | trace_gfs2_log_blocks(sdp, -blks); | |
547 | if (atomic_sub_return(blks, &sdp->sd_log_blks_needed)) | |
5e687eac | 548 | wake_up(&sdp->sd_log_waitq); |
b3b94faa DT |
549 | } |
550 | ||
fe3e3976 | 551 | /** |
2129b428 | 552 | * gfs2_log_try_reserve - Try to make a log reservation |
fe3e3976 | 553 | * @sdp: The GFS2 superblock |
2129b428 AG |
554 | * @tr: The transaction |
555 | * @extra_revokes: The number of additional revokes reserved (output) | |
556 | * | |
557 | * This is similar to gfs2_log_reserve, but sdp->sd_log_flush_lock must be | |
558 | * held for correct revoke accounting. | |
fe3e3976 | 559 | */ |
484adff8 | 560 | |
2129b428 AG |
561 | bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr, |
562 | unsigned int *extra_revokes) | |
fe3e3976 | 563 | { |
2129b428 AG |
564 | unsigned int blks = tr->tr_reserved; |
565 | unsigned int revokes = tr->tr_revokes; | |
566 | unsigned int revoke_blks = 0; | |
567 | ||
568 | *extra_revokes = 0; | |
569 | if (revokes && !__gfs2_log_try_reserve_revokes(sdp, revokes)) { | |
570 | revoke_blks = DIV_ROUND_UP(revokes, sdp->sd_inptrs); | |
571 | *extra_revokes = revoke_blks * sdp->sd_inptrs - revokes; | |
572 | blks += revoke_blks; | |
24972557 | 573 | } |
2129b428 AG |
574 | if (!blks) |
575 | return true; | |
fe3e3976 | 576 | if (__gfs2_log_try_reserve(sdp, blks, GFS2_LOG_FLUSH_MIN_BLOCKS)) |
2129b428 AG |
577 | return true; |
578 | if (!revoke_blks) | |
579 | gfs2_log_release_revokes(sdp, revokes); | |
580 | return false; | |
581 | } | |
582 | ||
583 | /** | |
584 | * gfs2_log_reserve - Make a log reservation | |
585 | * @sdp: The GFS2 superblock | |
586 | * @tr: The transaction | |
587 | * @extra_revokes: The number of additional revokes reserved (output) | |
588 | * | |
589 | * sdp->sd_log_flush_lock must not be held. | |
590 | */ | |
591 | ||
592 | void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr, | |
593 | unsigned int *extra_revokes) | |
594 | { | |
595 | unsigned int blks = tr->tr_reserved; | |
596 | unsigned int revokes = tr->tr_revokes; | |
597 | unsigned int revoke_blks = 0; | |
598 | ||
599 | *extra_revokes = 0; | |
600 | if (revokes) { | |
601 | revoke_blks = DIV_ROUND_UP(revokes, sdp->sd_inptrs); | |
602 | *extra_revokes = revoke_blks * sdp->sd_inptrs - revokes; | |
603 | blks += revoke_blks; | |
604 | } | |
fe3e3976 | 605 | __gfs2_log_reserve(sdp, blks, GFS2_LOG_FLUSH_MIN_BLOCKS); |
b3b94faa DT |
606 | } |
607 | ||
b3b94faa DT |
608 | /** |
609 | * log_distance - Compute distance between two journal blocks | |
610 | * @sdp: The GFS2 superblock | |
611 | * @newer: The most recent journal block of the pair | |
612 | * @older: The older journal block of the pair | |
613 | * | |
614 | * Compute the distance (in the journal direction) between two | |
615 | * blocks in the journal | |
616 | * | |
617 | * Returns: the distance in blocks | |
618 | */ | |
619 | ||
faa31ce8 | 620 | static inline unsigned int log_distance(struct gfs2_sbd *sdp, unsigned int newer, |
b3b94faa DT |
621 | unsigned int older) |
622 | { | |
623 | int dist; | |
624 | ||
625 | dist = newer - older; | |
626 | if (dist < 0) | |
627 | dist += sdp->sd_jdesc->jd_blocks; | |
628 | ||
629 | return dist; | |
630 | } | |
631 | ||
2332c443 | 632 | /** |
6188e877 | 633 | * calc_reserved - Calculate the number of blocks to keep reserved |
2332c443 RP |
634 | * @sdp: The GFS2 superblock |
635 | * | |
636 | * This is complex. We need to reserve room for all our currently used | |
6188e877 AG |
637 | * metadata blocks (e.g. normal file I/O rewriting file time stamps) and |
638 | * all our journaled data blocks for journaled files (e.g. files in the | |
2332c443 | 639 | * meta_fs like rindex, or files for which chattr +j was done.) |
6188e877 | 640 | * If we don't reserve enough space, corruption will follow. |
2332c443 | 641 | * |
6188e877 AG |
642 | * We can have metadata blocks and jdata blocks in the same journal. Each |
643 | * type gets its own log descriptor, for which we need to reserve a block. | |
644 | * In fact, each type has the potential for needing more than one log descriptor | |
645 | * in cases where we have more blocks than will fit in a log descriptor. | |
2332c443 | 646 | * Metadata journal entries take up half the space of journaled buffer entries. |
2332c443 RP |
647 | * |
648 | * Also, we need to reserve blocks for revoke journal entries and one for an | |
649 | * overall header for the lot. | |
650 | * | |
651 | * Returns: the number of blocks reserved | |
652 | */ | |
653 | static unsigned int calc_reserved(struct gfs2_sbd *sdp) | |
654 | { | |
fe3e3976 | 655 | unsigned int reserved = GFS2_LOG_FLUSH_MIN_BLOCKS; |
71b219f4 | 656 | unsigned int blocks; |
022ef4fe | 657 | struct gfs2_trans *tr = sdp->sd_log_tr; |
2332c443 | 658 | |
022ef4fe | 659 | if (tr) { |
71b219f4 AG |
660 | blocks = tr->tr_num_buf_new - tr->tr_num_buf_rm; |
661 | reserved += blocks + DIV_ROUND_UP(blocks, buf_limit(sdp)); | |
662 | blocks = tr->tr_num_databuf_new - tr->tr_num_databuf_rm; | |
663 | reserved += blocks + DIV_ROUND_UP(blocks, databuf_limit(sdp)); | |
022ef4fe | 664 | } |
2332c443 RP |
665 | return reserved; |
666 | } | |
667 | ||
5cb738b5 | 668 | static void log_pull_tail(struct gfs2_sbd *sdp) |
b3b94faa | 669 | { |
5cb738b5 AG |
670 | unsigned int new_tail = sdp->sd_log_flush_tail; |
671 | unsigned int dist; | |
b3b94faa | 672 | |
5cb738b5 AG |
673 | if (new_tail == sdp->sd_log_tail) |
674 | return; | |
675 | dist = log_distance(sdp, new_tail, sdp->sd_log_tail); | |
b3b94faa | 676 | ail2_empty(sdp, new_tail); |
c1eba1b0 | 677 | gfs2_log_release(sdp, dist); |
b3b94faa DT |
678 | sdp->sd_log_tail = new_tail; |
679 | } | |
680 | ||
b3b94faa | 681 | |
9ff78289 | 682 | void log_flush_wait(struct gfs2_sbd *sdp) |
b3b94faa | 683 | { |
16615be1 SW |
684 | DEFINE_WAIT(wait); |
685 | ||
686 | if (atomic_read(&sdp->sd_log_in_flight)) { | |
687 | do { | |
688 | prepare_to_wait(&sdp->sd_log_flush_wait, &wait, | |
689 | TASK_UNINTERRUPTIBLE); | |
690 | if (atomic_read(&sdp->sd_log_in_flight)) | |
691 | io_schedule(); | |
692 | } while(atomic_read(&sdp->sd_log_in_flight)); | |
693 | finish_wait(&sdp->sd_log_flush_wait, &wait); | |
b3b94faa | 694 | } |
b3b94faa DT |
695 | } |
696 | ||
4f0f586b | 697 | static int ip_cmp(void *priv, const struct list_head *a, const struct list_head *b) |
4a36d08d | 698 | { |
45138990 | 699 | struct gfs2_inode *ipa, *ipb; |
4a36d08d | 700 | |
45138990 SW |
701 | ipa = list_entry(a, struct gfs2_inode, i_ordered); |
702 | ipb = list_entry(b, struct gfs2_inode, i_ordered); | |
4a36d08d | 703 | |
45138990 | 704 | if (ipa->i_no_addr < ipb->i_no_addr) |
4a36d08d | 705 | return -1; |
45138990 | 706 | if (ipa->i_no_addr > ipb->i_no_addr) |
4a36d08d BP |
707 | return 1; |
708 | return 0; | |
709 | } | |
710 | ||
7542486b BP |
711 | static void __ordered_del_inode(struct gfs2_inode *ip) |
712 | { | |
713 | if (!list_empty(&ip->i_ordered)) | |
714 | list_del_init(&ip->i_ordered); | |
715 | } | |
716 | ||
d7b616e2 SW |
717 | static void gfs2_ordered_write(struct gfs2_sbd *sdp) |
718 | { | |
45138990 | 719 | struct gfs2_inode *ip; |
d7b616e2 SW |
720 | LIST_HEAD(written); |
721 | ||
45138990 | 722 | spin_lock(&sdp->sd_ordered_lock); |
a5b1d3fc AG |
723 | list_sort(NULL, &sdp->sd_log_ordered, &ip_cmp); |
724 | while (!list_empty(&sdp->sd_log_ordered)) { | |
969183bc | 725 | ip = list_first_entry(&sdp->sd_log_ordered, struct gfs2_inode, i_ordered); |
1f23bc78 | 726 | if (ip->i_inode.i_mapping->nrpages == 0) { |
7542486b | 727 | __ordered_del_inode(ip); |
d7b616e2 | 728 | continue; |
1f23bc78 AD |
729 | } |
730 | list_move(&ip->i_ordered, &written); | |
45138990 SW |
731 | spin_unlock(&sdp->sd_ordered_lock); |
732 | filemap_fdatawrite(ip->i_inode.i_mapping); | |
733 | spin_lock(&sdp->sd_ordered_lock); | |
d7b616e2 | 734 | } |
a5b1d3fc | 735 | list_splice(&written, &sdp->sd_log_ordered); |
45138990 | 736 | spin_unlock(&sdp->sd_ordered_lock); |
d7b616e2 SW |
737 | } |
738 | ||
739 | static void gfs2_ordered_wait(struct gfs2_sbd *sdp) | |
740 | { | |
45138990 | 741 | struct gfs2_inode *ip; |
d7b616e2 | 742 | |
45138990 | 743 | spin_lock(&sdp->sd_ordered_lock); |
a5b1d3fc | 744 | while (!list_empty(&sdp->sd_log_ordered)) { |
969183bc | 745 | ip = list_first_entry(&sdp->sd_log_ordered, struct gfs2_inode, i_ordered); |
7542486b | 746 | __ordered_del_inode(ip); |
45138990 | 747 | if (ip->i_inode.i_mapping->nrpages == 0) |
d7b616e2 | 748 | continue; |
45138990 SW |
749 | spin_unlock(&sdp->sd_ordered_lock); |
750 | filemap_fdatawait(ip->i_inode.i_mapping); | |
751 | spin_lock(&sdp->sd_ordered_lock); | |
d7b616e2 | 752 | } |
45138990 SW |
753 | spin_unlock(&sdp->sd_ordered_lock); |
754 | } | |
755 | ||
756 | void gfs2_ordered_del_inode(struct gfs2_inode *ip) | |
757 | { | |
758 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
759 | ||
760 | spin_lock(&sdp->sd_ordered_lock); | |
7542486b | 761 | __ordered_del_inode(ip); |
45138990 | 762 | spin_unlock(&sdp->sd_ordered_lock); |
d7b616e2 SW |
763 | } |
764 | ||
5d054964 BM |
765 | void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) |
766 | { | |
767 | struct buffer_head *bh = bd->bd_bh; | |
768 | struct gfs2_glock *gl = bd->bd_gl; | |
769 | ||
f4e2f5e1 AG |
770 | sdp->sd_log_num_revoke++; |
771 | if (atomic_inc_return(&gl->gl_revokes) == 1) | |
772 | gfs2_glock_hold(gl); | |
5d054964 BM |
773 | bh->b_private = NULL; |
774 | bd->bd_blkno = bh->b_blocknr; | |
9290a9a7 BP |
775 | gfs2_remove_from_ail(bd); /* drops ref on bh */ |
776 | bd->bd_bh = NULL; | |
5d054964 | 777 | set_bit(GLF_LFLUSH, &gl->gl_flags); |
a5b1d3fc | 778 | list_add(&bd->bd_list, &sdp->sd_log_revokes); |
5d054964 BM |
779 | } |
780 | ||
fe5e7ba1 BP |
781 | void gfs2_glock_remove_revoke(struct gfs2_glock *gl) |
782 | { | |
783 | if (atomic_dec_return(&gl->gl_revokes) == 0) { | |
784 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
785 | gfs2_glock_queue_put(gl); | |
786 | } | |
787 | } | |
788 | ||
5e4c7632 | 789 | /** |
e7501bf8 | 790 | * gfs2_flush_revokes - Add as many revokes to the system transaction as we can |
5e4c7632 BP |
791 | * @sdp: The GFS2 superblock |
792 | * | |
793 | * Our usual strategy is to defer writing revokes as much as we can in the hope | |
794 | * that we'll eventually overwrite the journal, which will make those revokes | |
795 | * go away. This changes when we flush the log: at that point, there will | |
796 | * likely be some left-over space in the last revoke block of that transaction. | |
797 | * We can fill that space with additional revokes for blocks that have already | |
798 | * been written back. This will basically come at no cost now, and will save | |
799 | * us from having to keep track of those blocks on the AIL2 list later. | |
800 | */ | |
e7501bf8 | 801 | void gfs2_flush_revokes(struct gfs2_sbd *sdp) |
5d054964 | 802 | { |
5e4c7632 | 803 | /* number of revokes we still have room for */ |
2129b428 | 804 | unsigned int max_revokes = atomic_read(&sdp->sd_log_revokes_available); |
5d054964 | 805 | |
5e4c7632 | 806 | gfs2_log_lock(sdp); |
5e4c7632 | 807 | gfs2_ail1_empty(sdp, max_revokes); |
5d054964 | 808 | gfs2_log_unlock(sdp); |
5d054964 BM |
809 | } |
810 | ||
34cc1781 | 811 | /** |
7c70b896 | 812 | * gfs2_write_log_header - Write a journal log header buffer at lblock |
34cc1781 | 813 | * @sdp: The GFS2 superblock |
c1696fb8 | 814 | * @jd: journal descriptor of the journal to which we are writing |
588bff95 BP |
815 | * @seq: sequence number |
816 | * @tail: tail of the log | |
7c70b896 | 817 | * @lblock: value for lh_blkno (block number relative to start of journal) |
c1696fb8 | 818 | * @flags: log header flags GFS2_LOG_HEAD_* |
588bff95 | 819 | * @op_flags: flags to pass to the bio |
34cc1781 SW |
820 | * |
821 | * Returns: the initialized log buffer descriptor | |
822 | */ | |
823 | ||
c1696fb8 | 824 | void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd, |
7c70b896 BP |
825 | u64 seq, u32 tail, u32 lblock, u32 flags, |
826 | int op_flags) | |
34cc1781 | 827 | { |
34cc1781 | 828 | struct gfs2_log_header *lh; |
c1696fb8 | 829 | u32 hash, crc; |
ade48088 | 830 | struct page *page; |
c1696fb8 BP |
831 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
832 | struct timespec64 tv; | |
833 | struct super_block *sb = sdp->sd_vfs; | |
7c70b896 | 834 | u64 dblock; |
588bff95 | 835 | |
ade48088 | 836 | if (gfs2_withdrawn(sdp)) |
4a3d049d | 837 | return; |
ade48088 BP |
838 | |
839 | page = mempool_alloc(gfs2_page_pool, GFP_NOIO); | |
e8c92ed7 SW |
840 | lh = page_address(page); |
841 | clear_page(lh); | |
34cc1781 | 842 | |
34cc1781 SW |
843 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
844 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); | |
845 | lh->lh_header.__pad0 = cpu_to_be64(0); | |
846 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); | |
847 | lh->lh_header.mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); | |
588bff95 | 848 | lh->lh_sequence = cpu_to_be64(seq); |
34cc1781 SW |
849 | lh->lh_flags = cpu_to_be32(flags); |
850 | lh->lh_tail = cpu_to_be32(tail); | |
7c70b896 | 851 | lh->lh_blkno = cpu_to_be32(lblock); |
c1696fb8 | 852 | hash = ~crc32(~0, lh, LH_V1_SIZE); |
34cc1781 SW |
853 | lh->lh_hash = cpu_to_be32(hash); |
854 | ||
ee9c7f9a | 855 | ktime_get_coarse_real_ts64(&tv); |
c1696fb8 BP |
856 | lh->lh_nsec = cpu_to_be32(tv.tv_nsec); |
857 | lh->lh_sec = cpu_to_be64(tv.tv_sec); | |
7c70b896 | 858 | if (!list_empty(&jd->extent_list)) |
19ebc050 | 859 | dblock = gfs2_log_bmap(jd, lblock); |
7c70b896 | 860 | else { |
152f58c9 AG |
861 | unsigned int extlen; |
862 | int ret; | |
863 | ||
864 | extlen = 1; | |
865 | ret = gfs2_get_extent(jd->jd_inode, lblock, &dblock, &extlen); | |
7c70b896 BP |
866 | if (gfs2_assert_withdraw(sdp, ret == 0)) |
867 | return; | |
868 | } | |
869 | lh->lh_addr = cpu_to_be64(dblock); | |
c1696fb8 BP |
870 | lh->lh_jinode = cpu_to_be64(GFS2_I(jd->jd_inode)->i_no_addr); |
871 | ||
872 | /* We may only write local statfs, quota, etc., when writing to our | |
873 | own journal. The values are left 0 when recovering a journal | |
874 | different from our own. */ | |
875 | if (!(flags & GFS2_LOG_HEAD_RECOVERY)) { | |
876 | lh->lh_statfs_addr = | |
877 | cpu_to_be64(GFS2_I(sdp->sd_sc_inode)->i_no_addr); | |
878 | lh->lh_quota_addr = | |
879 | cpu_to_be64(GFS2_I(sdp->sd_qc_inode)->i_no_addr); | |
880 | ||
881 | spin_lock(&sdp->sd_statfs_spin); | |
882 | lh->lh_local_total = cpu_to_be64(l_sc->sc_total); | |
883 | lh->lh_local_free = cpu_to_be64(l_sc->sc_free); | |
884 | lh->lh_local_dinodes = cpu_to_be64(l_sc->sc_dinodes); | |
885 | spin_unlock(&sdp->sd_statfs_spin); | |
886 | } | |
887 | ||
888 | BUILD_BUG_ON(offsetof(struct gfs2_log_header, lh_crc) != LH_V1_SIZE); | |
889 | ||
890 | crc = crc32c(~0, (void *)lh + LH_V1_SIZE + 4, | |
891 | sb->s_blocksize - LH_V1_SIZE - 4); | |
892 | lh->lh_crc = cpu_to_be32(crc); | |
893 | ||
82218943 BP |
894 | gfs2_log_write(sdp, jd, page, sb->s_blocksize, 0, dblock); |
895 | gfs2_log_submit_bio(&jd->jd_log_bio, REQ_OP_WRITE | op_flags); | |
588bff95 BP |
896 | } |
897 | ||
898 | /** | |
899 | * log_write_header - Get and initialize a journal header buffer | |
900 | * @sdp: The GFS2 superblock | |
c1696fb8 | 901 | * @flags: The log header flags, including log header origin |
588bff95 BP |
902 | * |
903 | * Returns: the initialized log buffer descriptor | |
904 | */ | |
905 | ||
906 | static void log_write_header(struct gfs2_sbd *sdp, u32 flags) | |
907 | { | |
588bff95 BP |
908 | int op_flags = REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC; |
909 | enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state); | |
910 | ||
911 | gfs2_assert_withdraw(sdp, (state != SFS_FROZEN)); | |
588bff95 | 912 | |
34cc1781 SW |
913 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) { |
914 | gfs2_ordered_wait(sdp); | |
915 | log_flush_wait(sdp); | |
70fd7614 | 916 | op_flags = REQ_SYNC | REQ_META | REQ_PRIO; |
34cc1781 | 917 | } |
5cb738b5 AG |
918 | sdp->sd_log_idle = (sdp->sd_log_flush_tail == sdp->sd_log_flush_head); |
919 | gfs2_write_log_header(sdp, sdp->sd_jdesc, sdp->sd_log_sequence++, | |
920 | sdp->sd_log_flush_tail, sdp->sd_log_flush_head, | |
921 | flags, op_flags); | |
19ebc050 | 922 | gfs2_log_incr_head(sdp); |
4a3d049d | 923 | log_flush_wait(sdp); |
5cb738b5 | 924 | log_pull_tail(sdp); |
fe3e3976 | 925 | gfs2_log_update_head(sdp); |
34cc1781 SW |
926 | } |
927 | ||
2ca0c2fb BP |
928 | /** |
929 | * ail_drain - drain the ail lists after a withdraw | |
930 | * @sdp: Pointer to GFS2 superblock | |
931 | */ | |
932 | static void ail_drain(struct gfs2_sbd *sdp) | |
933 | { | |
934 | struct gfs2_trans *tr; | |
935 | ||
936 | spin_lock(&sdp->sd_ail_lock); | |
937 | /* | |
938 | * For transactions on the sd_ail1_list we need to drain both the | |
939 | * ail1 and ail2 lists. That's because function gfs2_ail1_start_one | |
940 | * (temporarily) moves items from its tr_ail1 list to tr_ail2 list | |
941 | * before revokes are sent for that block. Items on the sd_ail2_list | |
942 | * should have already gotten beyond that point, so no need. | |
943 | */ | |
944 | while (!list_empty(&sdp->sd_ail1_list)) { | |
945 | tr = list_first_entry(&sdp->sd_ail1_list, struct gfs2_trans, | |
946 | tr_list); | |
947 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail1_list); | |
948 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); | |
949 | list_del(&tr->tr_list); | |
b839dada | 950 | gfs2_trans_free(sdp, tr); |
2ca0c2fb BP |
951 | } |
952 | while (!list_empty(&sdp->sd_ail2_list)) { | |
953 | tr = list_first_entry(&sdp->sd_ail2_list, struct gfs2_trans, | |
954 | tr_list); | |
955 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); | |
956 | list_del(&tr->tr_list); | |
b839dada | 957 | gfs2_trans_free(sdp, tr); |
2ca0c2fb BP |
958 | } |
959 | spin_unlock(&sdp->sd_ail_lock); | |
960 | } | |
961 | ||
d5dc3d96 BP |
962 | /** |
963 | * empty_ail1_list - try to start IO and empty the ail1 list | |
964 | * @sdp: Pointer to GFS2 superblock | |
965 | */ | |
966 | static void empty_ail1_list(struct gfs2_sbd *sdp) | |
967 | { | |
968 | unsigned long start = jiffies; | |
969 | ||
970 | for (;;) { | |
971 | if (time_after(jiffies, start + (HZ * 600))) { | |
972 | fs_err(sdp, "Error: In %s for 10 minutes! t=%d\n", | |
973 | __func__, current->journal_info ? 1 : 0); | |
974 | dump_ail_list(sdp); | |
975 | return; | |
976 | } | |
977 | gfs2_ail1_start(sdp); | |
978 | gfs2_ail1_wait(sdp); | |
979 | if (gfs2_ail1_empty(sdp, 0)) | |
980 | return; | |
981 | } | |
982 | } | |
983 | ||
462582b9 | 984 | /** |
521031fa | 985 | * trans_drain - drain the buf and databuf queue for a failed transaction |
462582b9 BP |
986 | * @tr: the transaction to drain |
987 | * | |
988 | * When this is called, we're taking an error exit for a log write that failed | |
989 | * but since we bypassed the after_commit functions, we need to remove the | |
990 | * items from the buf and databuf queue. | |
991 | */ | |
992 | static void trans_drain(struct gfs2_trans *tr) | |
993 | { | |
994 | struct gfs2_bufdata *bd; | |
995 | struct list_head *head; | |
996 | ||
997 | if (!tr) | |
998 | return; | |
999 | ||
1000 | head = &tr->tr_buf; | |
1001 | while (!list_empty(head)) { | |
1002 | bd = list_first_entry(head, struct gfs2_bufdata, bd_list); | |
1003 | list_del_init(&bd->bd_list); | |
1a5a2cfd BP |
1004 | if (!list_empty(&bd->bd_ail_st_list)) |
1005 | gfs2_remove_from_ail(bd); | |
462582b9 BP |
1006 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
1007 | } | |
1008 | head = &tr->tr_databuf; | |
1009 | while (!list_empty(head)) { | |
1010 | bd = list_first_entry(head, struct gfs2_bufdata, bd_list); | |
1011 | list_del_init(&bd->bd_list); | |
1a5a2cfd BP |
1012 | if (!list_empty(&bd->bd_ail_st_list)) |
1013 | gfs2_remove_from_ail(bd); | |
462582b9 BP |
1014 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
1015 | } | |
1016 | } | |
1017 | ||
b3b94faa | 1018 | /** |
b09e593d | 1019 | * gfs2_log_flush - flush incore transaction(s) |
c551f66c | 1020 | * @sdp: The filesystem |
b3b94faa | 1021 | * @gl: The glock structure to flush. If NULL, flush the whole incore log |
805c0907 | 1022 | * @flags: The log header flags: GFS2_LOG_HEAD_FLUSH_* and debug flags |
b3b94faa DT |
1023 | * |
1024 | */ | |
1025 | ||
c1696fb8 | 1026 | void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags) |
b3b94faa | 1027 | { |
2ca0c2fb | 1028 | struct gfs2_trans *tr = NULL; |
fe3e3976 | 1029 | unsigned int reserved_blocks = 0, used_blocks = 0; |
2e60d768 | 1030 | enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state); |
fe3e3976 | 1031 | unsigned int first_log_head; |
2129b428 | 1032 | unsigned int reserved_revokes = 0; |
b3b94faa | 1033 | |
484adff8 | 1034 | down_write(&sdp->sd_log_flush_lock); |
fe3e3976 | 1035 | trace_gfs2_log_flush(sdp, 1, flags); |
f55ab26a | 1036 | |
fe3e3976 | 1037 | repeat: |
2ca0c2fb BP |
1038 | /* |
1039 | * Do this check while holding the log_flush_lock to prevent new | |
1040 | * buffers from being added to the ail via gfs2_pin() | |
1041 | */ | |
0efc4976 | 1042 | if (gfs2_withdrawn(sdp) || !test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) |
2ca0c2fb BP |
1043 | goto out; |
1044 | ||
2bcd610d | 1045 | /* Log might have been flushed while we waited for the flush lock */ |
5a61ae14 AG |
1046 | if (gl && !test_bit(GLF_LFLUSH, &gl->gl_flags)) |
1047 | goto out; | |
f55ab26a | 1048 | |
fe3e3976 AG |
1049 | first_log_head = sdp->sd_log_head; |
1050 | sdp->sd_log_flush_head = first_log_head; | |
400ac52e | 1051 | |
16ca9412 | 1052 | tr = sdp->sd_log_tr; |
fe3e3976 AG |
1053 | if (tr || sdp->sd_log_num_revoke) { |
1054 | if (reserved_blocks) | |
1055 | gfs2_log_release(sdp, reserved_blocks); | |
1056 | reserved_blocks = sdp->sd_log_blks_reserved; | |
2129b428 | 1057 | reserved_revokes = sdp->sd_log_num_revoke; |
fe3e3976 AG |
1058 | if (tr) { |
1059 | sdp->sd_log_tr = NULL; | |
1060 | tr->tr_first = first_log_head; | |
2129b428 | 1061 | if (unlikely (state == SFS_FROZEN)) { |
fe3e3976 AG |
1062 | if (gfs2_assert_withdraw_delayed(sdp, |
1063 | !tr->tr_num_buf_new && !tr->tr_num_databuf_new)) | |
1064 | goto out_withdraw; | |
2129b428 | 1065 | } |
fe3e3976 AG |
1066 | } |
1067 | } else if (!reserved_blocks) { | |
1068 | unsigned int taboo_blocks = GFS2_LOG_FLUSH_MIN_BLOCKS; | |
1069 | ||
1070 | reserved_blocks = GFS2_LOG_FLUSH_MIN_BLOCKS; | |
1071 | if (current == sdp->sd_logd_process) | |
1072 | taboo_blocks = 0; | |
1073 | ||
1074 | if (!__gfs2_log_try_reserve(sdp, reserved_blocks, taboo_blocks)) { | |
1075 | up_write(&sdp->sd_log_flush_lock); | |
1076 | __gfs2_log_reserve(sdp, reserved_blocks, taboo_blocks); | |
1077 | down_write(&sdp->sd_log_flush_lock); | |
1078 | goto repeat; | |
1079 | } | |
2129b428 | 1080 | BUG_ON(sdp->sd_log_num_revoke); |
16ca9412 | 1081 | } |
b3b94faa | 1082 | |
fe3e3976 AG |
1083 | if (flags & GFS2_LOG_HEAD_FLUSH_SHUTDOWN) |
1084 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
1085 | ||
2e60d768 | 1086 | if (unlikely(state == SFS_FROZEN)) |
2129b428 | 1087 | if (gfs2_assert_withdraw_delayed(sdp, !reserved_revokes)) |
5a61ae14 | 1088 | goto out_withdraw; |
b3b94faa | 1089 | |
d7b616e2 | 1090 | gfs2_ordered_write(sdp); |
2ca0c2fb | 1091 | if (gfs2_withdrawn(sdp)) |
5a61ae14 | 1092 | goto out_withdraw; |
d69a3c65 | 1093 | lops_before_commit(sdp, tr); |
2ca0c2fb | 1094 | if (gfs2_withdrawn(sdp)) |
5a61ae14 | 1095 | goto out_withdraw; |
82218943 | 1096 | gfs2_log_submit_bio(&sdp->sd_jdesc->jd_log_bio, REQ_OP_WRITE); |
2ca0c2fb | 1097 | if (gfs2_withdrawn(sdp)) |
5a61ae14 | 1098 | goto out_withdraw; |
d7b616e2 | 1099 | |
34cc1781 | 1100 | if (sdp->sd_log_head != sdp->sd_log_flush_head) { |
c1696fb8 | 1101 | log_write_header(sdp, flags); |
5cb738b5 | 1102 | } else if (sdp->sd_log_tail != sdp->sd_log_flush_tail && !sdp->sd_log_idle) { |
c1696fb8 | 1103 | log_write_header(sdp, flags); |
2332c443 | 1104 | } |
2ca0c2fb | 1105 | if (gfs2_withdrawn(sdp)) |
5a61ae14 | 1106 | goto out_withdraw; |
16ca9412 | 1107 | lops_after_commit(sdp, tr); |
b09e593d | 1108 | |
fe1a698f | 1109 | gfs2_log_lock(sdp); |
faa31ce8 | 1110 | sdp->sd_log_blks_reserved = 0; |
b3b94faa | 1111 | |
d6a079e8 | 1112 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 BM |
1113 | if (tr && !list_empty(&tr->tr_ail1_list)) { |
1114 | list_add(&tr->tr_list, &sdp->sd_ail1_list); | |
1115 | tr = NULL; | |
b3b94faa | 1116 | } |
d6a079e8 | 1117 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 1118 | gfs2_log_unlock(sdp); |
24972557 | 1119 | |
c1696fb8 | 1120 | if (!(flags & GFS2_LOG_HEAD_FLUSH_NORMAL)) { |
24972557 | 1121 | if (!sdp->sd_log_idle) { |
d5dc3d96 | 1122 | empty_ail1_list(sdp); |
30fe70a8 | 1123 | if (gfs2_withdrawn(sdp)) |
5a61ae14 | 1124 | goto out_withdraw; |
c1696fb8 | 1125 | log_write_header(sdp, flags); |
24972557 | 1126 | } |
c1696fb8 BP |
1127 | if (flags & (GFS2_LOG_HEAD_FLUSH_SHUTDOWN | |
1128 | GFS2_LOG_HEAD_FLUSH_FREEZE)) | |
24972557 | 1129 | gfs2_log_shutdown(sdp); |
c1696fb8 | 1130 | if (flags & GFS2_LOG_HEAD_FLUSH_FREEZE) |
2e60d768 | 1131 | atomic_set(&sdp->sd_freeze_state, SFS_FROZEN); |
24972557 BM |
1132 | } |
1133 | ||
5a61ae14 | 1134 | out_end: |
fe3e3976 | 1135 | used_blocks = log_distance(sdp, sdp->sd_log_flush_head, first_log_head); |
2129b428 AG |
1136 | reserved_revokes += atomic_read(&sdp->sd_log_revokes_available); |
1137 | atomic_set(&sdp->sd_log_revokes_available, sdp->sd_ldptrs); | |
1138 | gfs2_assert_withdraw(sdp, reserved_revokes % sdp->sd_inptrs == sdp->sd_ldptrs); | |
1139 | if (reserved_revokes > sdp->sd_ldptrs) | |
1140 | reserved_blocks += (reserved_revokes - sdp->sd_ldptrs) / sdp->sd_inptrs; | |
5a61ae14 | 1141 | out: |
2129b428 AG |
1142 | if (used_blocks != reserved_blocks) { |
1143 | gfs2_assert_withdraw_delayed(sdp, used_blocks < reserved_blocks); | |
fe3e3976 | 1144 | gfs2_log_release(sdp, reserved_blocks - used_blocks); |
2129b428 | 1145 | } |
484adff8 | 1146 | up_write(&sdp->sd_log_flush_lock); |
b839dada | 1147 | gfs2_trans_free(sdp, tr); |
5a61ae14 AG |
1148 | if (gfs2_withdrawing(sdp)) |
1149 | gfs2_withdraw(sdp); | |
fe3e3976 | 1150 | trace_gfs2_log_flush(sdp, 0, flags); |
5a61ae14 AG |
1151 | return; |
1152 | ||
1153 | out_withdraw: | |
1154 | trans_drain(tr); | |
1155 | /** | |
1156 | * If the tr_list is empty, we're withdrawing during a log | |
1157 | * flush that targets a transaction, but the transaction was | |
1158 | * never queued onto any of the ail lists. Here we add it to | |
1159 | * ail1 just so that ail_drain() will find and free it. | |
1160 | */ | |
1161 | spin_lock(&sdp->sd_ail_lock); | |
1162 | if (tr && list_empty(&tr->tr_list)) | |
1163 | list_add(&tr->tr_list, &sdp->sd_ail1_list); | |
1164 | spin_unlock(&sdp->sd_ail_lock); | |
1165 | ail_drain(sdp); /* frees all transactions */ | |
1166 | tr = NULL; | |
1167 | goto out_end; | |
b3b94faa DT |
1168 | } |
1169 | ||
d69a3c65 SW |
1170 | /** |
1171 | * gfs2_merge_trans - Merge a new transaction into a cached transaction | |
c551f66c | 1172 | * @sdp: the filesystem |
d69a3c65 SW |
1173 | * @new: New transaction to be merged |
1174 | */ | |
1175 | ||
83d060ca | 1176 | static void gfs2_merge_trans(struct gfs2_sbd *sdp, struct gfs2_trans *new) |
d69a3c65 | 1177 | { |
83d060ca BP |
1178 | struct gfs2_trans *old = sdp->sd_log_tr; |
1179 | ||
9862ca05 | 1180 | WARN_ON_ONCE(!test_bit(TR_ATTACHED, &old->tr_flags)); |
d69a3c65 SW |
1181 | |
1182 | old->tr_num_buf_new += new->tr_num_buf_new; | |
1183 | old->tr_num_databuf_new += new->tr_num_databuf_new; | |
1184 | old->tr_num_buf_rm += new->tr_num_buf_rm; | |
1185 | old->tr_num_databuf_rm += new->tr_num_databuf_rm; | |
2129b428 | 1186 | old->tr_revokes += new->tr_revokes; |
d69a3c65 | 1187 | old->tr_num_revoke += new->tr_num_revoke; |
d69a3c65 SW |
1188 | |
1189 | list_splice_tail_init(&new->tr_databuf, &old->tr_databuf); | |
1190 | list_splice_tail_init(&new->tr_buf, &old->tr_buf); | |
83d060ca BP |
1191 | |
1192 | spin_lock(&sdp->sd_ail_lock); | |
1193 | list_splice_tail_init(&new->tr_ail1_list, &old->tr_ail1_list); | |
1194 | list_splice_tail_init(&new->tr_ail2_list, &old->tr_ail2_list); | |
1195 | spin_unlock(&sdp->sd_ail_lock); | |
d69a3c65 SW |
1196 | } |
1197 | ||
b3b94faa DT |
1198 | static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
1199 | { | |
2332c443 | 1200 | unsigned int reserved; |
ac39aadd | 1201 | unsigned int unused; |
022ef4fe | 1202 | unsigned int maxres; |
b3b94faa DT |
1203 | |
1204 | gfs2_log_lock(sdp); | |
1205 | ||
022ef4fe | 1206 | if (sdp->sd_log_tr) { |
83d060ca | 1207 | gfs2_merge_trans(sdp, tr); |
022ef4fe | 1208 | } else if (tr->tr_num_buf_new || tr->tr_num_databuf_new) { |
c968f578 | 1209 | gfs2_assert_withdraw(sdp, !test_bit(TR_ONSTACK, &tr->tr_flags)); |
022ef4fe | 1210 | sdp->sd_log_tr = tr; |
9862ca05 | 1211 | set_bit(TR_ATTACHED, &tr->tr_flags); |
022ef4fe SW |
1212 | } |
1213 | ||
2332c443 | 1214 | reserved = calc_reserved(sdp); |
022ef4fe SW |
1215 | maxres = sdp->sd_log_blks_reserved + tr->tr_reserved; |
1216 | gfs2_assert_withdraw(sdp, maxres >= reserved); | |
1217 | unused = maxres - reserved; | |
5ae8fff8 AG |
1218 | if (unused) |
1219 | gfs2_log_release(sdp, unused); | |
b3b94faa DT |
1220 | sdp->sd_log_blks_reserved = reserved; |
1221 | ||
1222 | gfs2_log_unlock(sdp); | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * gfs2_log_commit - Commit a transaction to the log | |
1227 | * @sdp: the filesystem | |
1228 | * @tr: the transaction | |
1229 | * | |
5e687eac BM |
1230 | * We wake up gfs2_logd if the number of pinned blocks exceed thresh1 |
1231 | * or the total number of used blocks (pinned blocks plus AIL blocks) | |
1232 | * is greater than thresh2. | |
1233 | * | |
b57bc0fb | 1234 | * At mount time thresh1 is 2/5ths of journal size, thresh2 is 4/5ths of |
5e687eac BM |
1235 | * journal size. |
1236 | * | |
b3b94faa DT |
1237 | * Returns: errno |
1238 | */ | |
1239 | ||
1240 | void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
1241 | { | |
1242 | log_refund(sdp, tr); | |
b3b94faa | 1243 | |
5e687eac BM |
1244 | if (atomic_read(&sdp->sd_log_pinned) > atomic_read(&sdp->sd_log_thresh1) || |
1245 | ((sdp->sd_jdesc->jd_blocks - atomic_read(&sdp->sd_log_blks_free)) > | |
1246 | atomic_read(&sdp->sd_log_thresh2))) | |
1247 | wake_up(&sdp->sd_logd_waitq); | |
b3b94faa DT |
1248 | } |
1249 | ||
1250 | /** | |
1251 | * gfs2_log_shutdown - write a shutdown header into a journal | |
1252 | * @sdp: the filesystem | |
1253 | * | |
1254 | */ | |
1255 | ||
feed98a8 | 1256 | static void gfs2_log_shutdown(struct gfs2_sbd *sdp) |
b3b94faa | 1257 | { |
b3b94faa | 1258 | gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved); |
b3b94faa | 1259 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
b3b94faa DT |
1260 | gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list)); |
1261 | ||
805c0907 | 1262 | log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT | GFS2_LFC_SHUTDOWN); |
fe3e3976 | 1263 | log_pull_tail(sdp); |
b3b94faa | 1264 | |
a74604be SW |
1265 | gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail); |
1266 | gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list)); | |
a25311c8 SW |
1267 | } |
1268 | ||
5e687eac BM |
1269 | static inline int gfs2_jrnl_flush_reqd(struct gfs2_sbd *sdp) |
1270 | { | |
f07b3520 BP |
1271 | return (atomic_read(&sdp->sd_log_pinned) + |
1272 | atomic_read(&sdp->sd_log_blks_needed) >= | |
1273 | atomic_read(&sdp->sd_log_thresh1)); | |
5e687eac BM |
1274 | } |
1275 | ||
1276 | static inline int gfs2_ail_flush_reqd(struct gfs2_sbd *sdp) | |
1277 | { | |
1278 | unsigned int used_blocks = sdp->sd_jdesc->jd_blocks - atomic_read(&sdp->sd_log_blks_free); | |
b066a4ee AD |
1279 | |
1280 | if (test_and_clear_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags)) | |
1281 | return 1; | |
1282 | ||
f07b3520 BP |
1283 | return used_blocks + atomic_read(&sdp->sd_log_blks_needed) >= |
1284 | atomic_read(&sdp->sd_log_thresh2); | |
5e687eac | 1285 | } |
ec69b188 SW |
1286 | |
1287 | /** | |
1288 | * gfs2_logd - Update log tail as Active Items get flushed to in-place blocks | |
c551f66c | 1289 | * @data: Pointer to GFS2 superblock |
ec69b188 SW |
1290 | * |
1291 | * Also, periodically check to make sure that we're using the most recent | |
1292 | * journal index. | |
1293 | */ | |
1294 | ||
1295 | int gfs2_logd(void *data) | |
1296 | { | |
1297 | struct gfs2_sbd *sdp = data; | |
5e687eac BM |
1298 | unsigned long t = 1; |
1299 | DEFINE_WAIT(wait); | |
ec69b188 SW |
1300 | |
1301 | while (!kthread_should_stop()) { | |
ec69b188 | 1302 | |
d22f69a0 BP |
1303 | if (gfs2_withdrawn(sdp)) { |
1304 | msleep_interruptible(HZ); | |
1305 | continue; | |
1306 | } | |
942b0cdd BP |
1307 | /* Check for errors writing to the journal */ |
1308 | if (sdp->sd_log_error) { | |
badb55ec AG |
1309 | gfs2_lm(sdp, |
1310 | "GFS2: fsid=%s: error %d: " | |
1311 | "withdrawing the file system to " | |
1312 | "prevent further damage.\n", | |
1313 | sdp->sd_fsname, sdp->sd_log_error); | |
1314 | gfs2_withdraw(sdp); | |
d22f69a0 | 1315 | continue; |
942b0cdd BP |
1316 | } |
1317 | ||
5e687eac | 1318 | if (gfs2_jrnl_flush_reqd(sdp) || t == 0) { |
5e4c7632 | 1319 | gfs2_ail1_empty(sdp, 0); |
805c0907 | 1320 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | |
fe3e3976 | 1321 | GFS2_LFC_LOGD_JFLUSH_REQD); |
5e687eac | 1322 | } |
ec69b188 | 1323 | |
5e687eac BM |
1324 | if (gfs2_ail_flush_reqd(sdp)) { |
1325 | gfs2_ail1_start(sdp); | |
26b06a69 | 1326 | gfs2_ail1_wait(sdp); |
5e4c7632 | 1327 | gfs2_ail1_empty(sdp, 0); |
805c0907 | 1328 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | |
fe3e3976 | 1329 | GFS2_LFC_LOGD_AIL_FLUSH_REQD); |
ec69b188 SW |
1330 | } |
1331 | ||
ec69b188 | 1332 | t = gfs2_tune_get(sdp, gt_logd_secs) * HZ; |
a0acae0e TH |
1333 | |
1334 | try_to_freeze(); | |
5e687eac BM |
1335 | |
1336 | do { | |
1337 | prepare_to_wait(&sdp->sd_logd_waitq, &wait, | |
5f487490 | 1338 | TASK_INTERRUPTIBLE); |
5e687eac BM |
1339 | if (!gfs2_ail_flush_reqd(sdp) && |
1340 | !gfs2_jrnl_flush_reqd(sdp) && | |
1341 | !kthread_should_stop()) | |
1342 | t = schedule_timeout(t); | |
1343 | } while(t && !gfs2_ail_flush_reqd(sdp) && | |
1344 | !gfs2_jrnl_flush_reqd(sdp) && | |
1345 | !kthread_should_stop()); | |
1346 | finish_wait(&sdp->sd_logd_waitq, &wait); | |
ec69b188 SW |
1347 | } |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 |