Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 16 | #include <linux/crc32.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d SW |
19 | #include "lm_interface.h" |
20 | #include "incore.h" | |
b3b94faa DT |
21 | #include "bmap.h" |
22 | #include "glock.h" | |
23 | #include "log.h" | |
24 | #include "lops.h" | |
25 | #include "meta_io.h" | |
5c676f6d | 26 | #include "util.h" |
71b86f56 | 27 | #include "dir.h" |
b3b94faa DT |
28 | |
29 | #define PULL 1 | |
30 | ||
b3b94faa DT |
31 | /** |
32 | * gfs2_struct2blk - compute stuff | |
33 | * @sdp: the filesystem | |
34 | * @nstruct: the number of structures | |
35 | * @ssize: the size of the structures | |
36 | * | |
37 | * Compute the number of log descriptor blocks needed to hold a certain number | |
38 | * of structures of a certain size. | |
39 | * | |
40 | * Returns: the number of blocks needed (minimum is always 1) | |
41 | */ | |
42 | ||
43 | unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct, | |
44 | unsigned int ssize) | |
45 | { | |
46 | unsigned int blks; | |
47 | unsigned int first, second; | |
48 | ||
49 | blks = 1; | |
faa31ce8 | 50 | first = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / ssize; |
b3b94faa DT |
51 | |
52 | if (nstruct > first) { | |
568f4c96 SW |
53 | second = (sdp->sd_sb.sb_bsize - |
54 | sizeof(struct gfs2_meta_header)) / ssize; | |
5c676f6d | 55 | blks += DIV_ROUND_UP(nstruct - first, second); |
b3b94faa DT |
56 | } |
57 | ||
58 | return blks; | |
59 | } | |
60 | ||
61 | void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags) | |
62 | { | |
63 | struct list_head *head = &sdp->sd_ail1_list; | |
cd915493 | 64 | u64 sync_gen; |
b3b94faa DT |
65 | struct list_head *first, *tmp; |
66 | struct gfs2_ail *first_ai, *ai; | |
67 | ||
68 | gfs2_log_lock(sdp); | |
69 | if (list_empty(head)) { | |
70 | gfs2_log_unlock(sdp); | |
71 | return; | |
72 | } | |
73 | sync_gen = sdp->sd_ail_sync_gen++; | |
74 | ||
75 | first = head->prev; | |
76 | first_ai = list_entry(first, struct gfs2_ail, ai_list); | |
77 | first_ai->ai_sync_gen = sync_gen; | |
78 | gfs2_ail1_start_one(sdp, first_ai); | |
79 | ||
80 | if (flags & DIO_ALL) | |
81 | first = NULL; | |
82 | ||
83 | for (;;) { | |
484adff8 SW |
84 | if (first && (head->prev != first || |
85 | gfs2_ail1_empty_one(sdp, first_ai, 0))) | |
b3b94faa DT |
86 | break; |
87 | ||
88 | for (tmp = head->prev; tmp != head; tmp = tmp->prev) { | |
89 | ai = list_entry(tmp, struct gfs2_ail, ai_list); | |
90 | if (ai->ai_sync_gen >= sync_gen) | |
91 | continue; | |
92 | ai->ai_sync_gen = sync_gen; | |
93 | gfs2_ail1_start_one(sdp, ai); | |
94 | break; | |
95 | } | |
96 | ||
97 | if (tmp == head) | |
98 | break; | |
99 | } | |
100 | ||
101 | gfs2_log_unlock(sdp); | |
102 | } | |
103 | ||
104 | int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags) | |
105 | { | |
106 | struct gfs2_ail *ai, *s; | |
107 | int ret; | |
108 | ||
109 | gfs2_log_lock(sdp); | |
110 | ||
111 | list_for_each_entry_safe_reverse(ai, s, &sdp->sd_ail1_list, ai_list) { | |
112 | if (gfs2_ail1_empty_one(sdp, ai, flags)) | |
113 | list_move(&ai->ai_list, &sdp->sd_ail2_list); | |
114 | else if (!(flags & DIO_ALL)) | |
115 | break; | |
116 | } | |
117 | ||
118 | ret = list_empty(&sdp->sd_ail1_list); | |
119 | ||
120 | gfs2_log_unlock(sdp); | |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
125 | static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) | |
126 | { | |
127 | struct gfs2_ail *ai, *safe; | |
128 | unsigned int old_tail = sdp->sd_log_tail; | |
129 | int wrap = (new_tail < old_tail); | |
130 | int a, b, rm; | |
131 | ||
132 | gfs2_log_lock(sdp); | |
133 | ||
134 | list_for_each_entry_safe(ai, safe, &sdp->sd_ail2_list, ai_list) { | |
135 | a = (old_tail <= ai->ai_first); | |
136 | b = (ai->ai_first < new_tail); | |
137 | rm = (wrap) ? (a || b) : (a && b); | |
138 | if (!rm) | |
139 | continue; | |
140 | ||
141 | gfs2_ail2_empty_one(sdp, ai); | |
142 | list_del(&ai->ai_list); | |
143 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail1_list)); | |
144 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail2_list)); | |
145 | kfree(ai); | |
146 | } | |
147 | ||
148 | gfs2_log_unlock(sdp); | |
149 | } | |
150 | ||
151 | /** | |
152 | * gfs2_log_reserve - Make a log reservation | |
153 | * @sdp: The GFS2 superblock | |
154 | * @blks: The number of blocks to reserve | |
155 | * | |
156 | * Returns: errno | |
157 | */ | |
158 | ||
159 | int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) | |
160 | { | |
b3b94faa DT |
161 | unsigned int try = 0; |
162 | ||
163 | if (gfs2_assert_warn(sdp, blks) || | |
164 | gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks)) | |
165 | return -EINVAL; | |
166 | ||
71b86f56 | 167 | mutex_lock(&sdp->sd_log_reserve_mutex); |
484adff8 SW |
168 | gfs2_log_lock(sdp); |
169 | while(sdp->sd_log_blks_free <= blks) { | |
b3b94faa | 170 | gfs2_log_unlock(sdp); |
b3b94faa | 171 | gfs2_ail1_empty(sdp, 0); |
b09e593d | 172 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
173 | |
174 | if (try++) | |
175 | gfs2_ail1_start(sdp, 0); | |
484adff8 | 176 | gfs2_log_lock(sdp); |
b3b94faa | 177 | } |
484adff8 SW |
178 | sdp->sd_log_blks_free -= blks; |
179 | gfs2_log_unlock(sdp); | |
180 | mutex_unlock(&sdp->sd_log_reserve_mutex); | |
181 | ||
182 | down_read(&sdp->sd_log_flush_lock); | |
b3b94faa DT |
183 | |
184 | return 0; | |
185 | } | |
186 | ||
187 | /** | |
188 | * gfs2_log_release - Release a given number of log blocks | |
189 | * @sdp: The GFS2 superblock | |
190 | * @blks: The number of blocks | |
191 | * | |
192 | */ | |
193 | ||
194 | void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks) | |
195 | { | |
b3b94faa DT |
196 | |
197 | gfs2_log_lock(sdp); | |
198 | sdp->sd_log_blks_free += blks; | |
199 | gfs2_assert_withdraw(sdp, | |
200 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); | |
201 | gfs2_log_unlock(sdp); | |
ed386507 | 202 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa DT |
203 | } |
204 | ||
cd915493 | 205 | static u64 log_bmap(struct gfs2_sbd *sdp, unsigned int lbn) |
b3b94faa DT |
206 | { |
207 | int new = 0; | |
cd915493 | 208 | u64 dbn; |
b3b94faa | 209 | int error; |
fd88de56 | 210 | int bdy; |
b3b94faa | 211 | |
fd88de56 | 212 | error = gfs2_block_map(sdp->sd_jdesc->jd_inode, lbn, &new, &dbn, &bdy); |
a67cdbd4 | 213 | if (error || !dbn) |
fd4de2d4 | 214 | printk(KERN_INFO "error=%d, dbn=%llu lbn=%u", error, (unsigned long long)dbn, lbn); |
b3b94faa DT |
215 | gfs2_assert_withdraw(sdp, !error && dbn); |
216 | ||
217 | return dbn; | |
218 | } | |
219 | ||
220 | /** | |
221 | * log_distance - Compute distance between two journal blocks | |
222 | * @sdp: The GFS2 superblock | |
223 | * @newer: The most recent journal block of the pair | |
224 | * @older: The older journal block of the pair | |
225 | * | |
226 | * Compute the distance (in the journal direction) between two | |
227 | * blocks in the journal | |
228 | * | |
229 | * Returns: the distance in blocks | |
230 | */ | |
231 | ||
faa31ce8 | 232 | static inline unsigned int log_distance(struct gfs2_sbd *sdp, unsigned int newer, |
b3b94faa DT |
233 | unsigned int older) |
234 | { | |
235 | int dist; | |
236 | ||
237 | dist = newer - older; | |
238 | if (dist < 0) | |
239 | dist += sdp->sd_jdesc->jd_blocks; | |
240 | ||
241 | return dist; | |
242 | } | |
243 | ||
244 | static unsigned int current_tail(struct gfs2_sbd *sdp) | |
245 | { | |
246 | struct gfs2_ail *ai; | |
247 | unsigned int tail; | |
248 | ||
249 | gfs2_log_lock(sdp); | |
250 | ||
faa31ce8 | 251 | if (list_empty(&sdp->sd_ail1_list)) { |
b3b94faa | 252 | tail = sdp->sd_log_head; |
faa31ce8 SW |
253 | } else { |
254 | ai = list_entry(sdp->sd_ail1_list.prev, struct gfs2_ail, ai_list); | |
b3b94faa DT |
255 | tail = ai->ai_first; |
256 | } | |
257 | ||
258 | gfs2_log_unlock(sdp); | |
259 | ||
260 | return tail; | |
261 | } | |
262 | ||
263 | static inline void log_incr_head(struct gfs2_sbd *sdp) | |
264 | { | |
265 | if (sdp->sd_log_flush_head == sdp->sd_log_tail) | |
faa31ce8 | 266 | gfs2_assert_withdraw(sdp, sdp->sd_log_flush_head == sdp->sd_log_head); |
b3b94faa DT |
267 | |
268 | if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { | |
269 | sdp->sd_log_flush_head = 0; | |
270 | sdp->sd_log_flush_wrapped = 1; | |
271 | } | |
272 | } | |
273 | ||
274 | /** | |
275 | * gfs2_log_get_buf - Get and initialize a buffer to use for log control data | |
276 | * @sdp: The GFS2 superblock | |
277 | * | |
278 | * Returns: the buffer_head | |
279 | */ | |
280 | ||
281 | struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp) | |
282 | { | |
cd915493 | 283 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
284 | struct gfs2_log_buf *lb; |
285 | struct buffer_head *bh; | |
286 | ||
4f3df041 | 287 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
288 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
289 | ||
290 | bh = lb->lb_bh = sb_getblk(sdp->sd_vfs, blkno); | |
291 | lock_buffer(bh); | |
292 | memset(bh->b_data, 0, bh->b_size); | |
293 | set_buffer_uptodate(bh); | |
294 | clear_buffer_dirty(bh); | |
295 | unlock_buffer(bh); | |
296 | ||
297 | log_incr_head(sdp); | |
298 | ||
299 | return bh; | |
300 | } | |
301 | ||
302 | /** | |
303 | * gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log | |
304 | * @sdp: the filesystem | |
305 | * @data: the data the buffer_head should point to | |
306 | * | |
307 | * Returns: the log buffer descriptor | |
308 | */ | |
309 | ||
310 | struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, | |
311 | struct buffer_head *real) | |
312 | { | |
cd915493 | 313 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
314 | struct gfs2_log_buf *lb; |
315 | struct buffer_head *bh; | |
316 | ||
4f3df041 | 317 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
318 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
319 | lb->lb_real = real; | |
320 | ||
321 | bh = lb->lb_bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL); | |
322 | atomic_set(&bh->b_count, 1); | |
323 | bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate); | |
18ec7d5c | 324 | set_bh_page(bh, real->b_page, bh_offset(real)); |
b3b94faa DT |
325 | bh->b_blocknr = blkno; |
326 | bh->b_size = sdp->sd_sb.sb_bsize; | |
327 | bh->b_bdev = sdp->sd_vfs->s_bdev; | |
328 | ||
329 | log_incr_head(sdp); | |
330 | ||
331 | return bh; | |
332 | } | |
333 | ||
334 | static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail, int pull) | |
335 | { | |
336 | unsigned int dist = log_distance(sdp, new_tail, sdp->sd_log_tail); | |
337 | ||
338 | ail2_empty(sdp, new_tail); | |
339 | ||
340 | gfs2_log_lock(sdp); | |
c5392124 | 341 | sdp->sd_log_blks_free += dist - (pull ? 1 : 0); |
faa31ce8 | 342 | gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); |
b3b94faa DT |
343 | gfs2_log_unlock(sdp); |
344 | ||
345 | sdp->sd_log_tail = new_tail; | |
346 | } | |
347 | ||
348 | /** | |
349 | * log_write_header - Get and initialize a journal header buffer | |
350 | * @sdp: The GFS2 superblock | |
351 | * | |
352 | * Returns: the initialized log buffer descriptor | |
353 | */ | |
354 | ||
cd915493 | 355 | static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull) |
b3b94faa | 356 | { |
cd915493 | 357 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
358 | struct buffer_head *bh; |
359 | struct gfs2_log_header *lh; | |
360 | unsigned int tail; | |
cd915493 | 361 | u32 hash; |
b3b94faa | 362 | |
b3b94faa DT |
363 | bh = sb_getblk(sdp->sd_vfs, blkno); |
364 | lock_buffer(bh); | |
365 | memset(bh->b_data, 0, bh->b_size); | |
366 | set_buffer_uptodate(bh); | |
367 | clear_buffer_dirty(bh); | |
368 | unlock_buffer(bh); | |
369 | ||
370 | gfs2_ail1_empty(sdp, 0); | |
371 | tail = current_tail(sdp); | |
372 | ||
373 | lh = (struct gfs2_log_header *)bh->b_data; | |
374 | memset(lh, 0, sizeof(struct gfs2_log_header)); | |
375 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
376 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); |
377 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); | |
e0f2bf78 SW |
378 | lh->lh_sequence = cpu_to_be64(sdp->sd_log_sequence++); |
379 | lh->lh_flags = cpu_to_be32(flags); | |
380 | lh->lh_tail = cpu_to_be32(tail); | |
381 | lh->lh_blkno = cpu_to_be32(sdp->sd_log_flush_head); | |
b3b94faa DT |
382 | hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header)); |
383 | lh->lh_hash = cpu_to_be32(hash); | |
384 | ||
385 | set_buffer_dirty(bh); | |
386 | if (sync_dirty_buffer(bh)) | |
387 | gfs2_io_error_bh(sdp, bh); | |
388 | brelse(bh); | |
389 | ||
390 | if (sdp->sd_log_tail != tail) | |
391 | log_pull_tail(sdp, tail, pull); | |
392 | else | |
393 | gfs2_assert_withdraw(sdp, !pull); | |
394 | ||
395 | sdp->sd_log_idle = (tail == sdp->sd_log_flush_head); | |
396 | log_incr_head(sdp); | |
397 | } | |
398 | ||
399 | static void log_flush_commit(struct gfs2_sbd *sdp) | |
400 | { | |
401 | struct list_head *head = &sdp->sd_log_flush_list; | |
402 | struct gfs2_log_buf *lb; | |
403 | struct buffer_head *bh; | |
b3b94faa DT |
404 | |
405 | while (!list_empty(head)) { | |
406 | lb = list_entry(head->next, struct gfs2_log_buf, lb_list); | |
407 | list_del(&lb->lb_list); | |
408 | bh = lb->lb_bh; | |
409 | ||
410 | wait_on_buffer(bh); | |
411 | if (!buffer_uptodate(bh)) | |
412 | gfs2_io_error_bh(sdp, bh); | |
413 | if (lb->lb_real) { | |
414 | while (atomic_read(&bh->b_count) != 1) /* Grrrr... */ | |
415 | schedule(); | |
416 | free_buffer_head(bh); | |
417 | } else | |
418 | brelse(bh); | |
419 | kfree(lb); | |
420 | } | |
421 | ||
422 | log_write_header(sdp, 0, 0); | |
423 | } | |
424 | ||
425 | /** | |
b09e593d | 426 | * gfs2_log_flush - flush incore transaction(s) |
b3b94faa DT |
427 | * @sdp: the filesystem |
428 | * @gl: The glock structure to flush. If NULL, flush the whole incore log | |
429 | * | |
430 | */ | |
431 | ||
b09e593d | 432 | void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl) |
b3b94faa DT |
433 | { |
434 | struct gfs2_ail *ai; | |
435 | ||
484adff8 | 436 | down_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
437 | |
438 | if (gl) { | |
439 | gfs2_log_lock(sdp); | |
440 | if (list_empty(&gl->gl_le.le_list)) { | |
441 | gfs2_log_unlock(sdp); | |
484adff8 | 442 | up_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
443 | return; |
444 | } | |
445 | gfs2_log_unlock(sdp); | |
446 | } | |
447 | ||
b09e593d SW |
448 | ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL); |
449 | INIT_LIST_HEAD(&ai->ai_ail1_list); | |
450 | INIT_LIST_HEAD(&ai->ai_ail2_list); | |
b3b94faa | 451 | |
faa31ce8 | 452 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_buf == sdp->sd_log_commited_buf); |
b3b94faa DT |
453 | gfs2_assert_withdraw(sdp, |
454 | sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke); | |
455 | ||
b3b94faa DT |
456 | sdp->sd_log_flush_head = sdp->sd_log_head; |
457 | sdp->sd_log_flush_wrapped = 0; | |
458 | ai->ai_first = sdp->sd_log_flush_head; | |
459 | ||
460 | lops_before_commit(sdp); | |
461 | if (!list_empty(&sdp->sd_log_flush_list)) | |
462 | log_flush_commit(sdp); | |
463 | else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle) | |
464 | log_write_header(sdp, 0, PULL); | |
465 | lops_after_commit(sdp, ai); | |
b3b94faa | 466 | sdp->sd_log_head = sdp->sd_log_flush_head; |
b09e593d | 467 | |
f4154ea0 | 468 | sdp->sd_log_blks_free -= sdp->sd_log_num_hdrs; |
b3b94faa | 469 | |
faa31ce8 SW |
470 | sdp->sd_log_blks_reserved = 0; |
471 | sdp->sd_log_commited_buf = 0; | |
472 | sdp->sd_log_num_hdrs = 0; | |
473 | sdp->sd_log_commited_revoke = 0; | |
b3b94faa DT |
474 | |
475 | gfs2_log_lock(sdp); | |
476 | if (!list_empty(&ai->ai_ail1_list)) { | |
477 | list_add(&ai->ai_list, &sdp->sd_ail1_list); | |
478 | ai = NULL; | |
479 | } | |
480 | gfs2_log_unlock(sdp); | |
481 | ||
b3b94faa | 482 | sdp->sd_vfs->s_dirt = 0; |
484adff8 | 483 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
484 | |
485 | kfree(ai); | |
486 | } | |
487 | ||
488 | static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
489 | { | |
5dc39fe6 | 490 | unsigned int reserved = 0; |
b3b94faa DT |
491 | unsigned int old; |
492 | ||
493 | gfs2_log_lock(sdp); | |
494 | ||
495 | sdp->sd_log_commited_buf += tr->tr_num_buf_new - tr->tr_num_buf_rm; | |
496 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_buf) >= 0); | |
497 | sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm; | |
498 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0); | |
499 | ||
500 | if (sdp->sd_log_commited_buf) | |
f4154ea0 | 501 | reserved += sdp->sd_log_commited_buf; |
b3b94faa DT |
502 | if (sdp->sd_log_commited_revoke) |
503 | reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke, | |
cd915493 | 504 | sizeof(u64)); |
5dc39fe6 BM |
505 | if (reserved) |
506 | reserved++; | |
b3b94faa DT |
507 | |
508 | old = sdp->sd_log_blks_free; | |
509 | sdp->sd_log_blks_free += tr->tr_reserved - | |
510 | (reserved - sdp->sd_log_blks_reserved); | |
511 | ||
b09e593d | 512 | gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old); |
b3b94faa | 513 | gfs2_assert_withdraw(sdp, |
f4154ea0 SW |
514 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks + |
515 | sdp->sd_log_num_hdrs); | |
b3b94faa DT |
516 | |
517 | sdp->sd_log_blks_reserved = reserved; | |
518 | ||
519 | gfs2_log_unlock(sdp); | |
520 | } | |
521 | ||
522 | /** | |
523 | * gfs2_log_commit - Commit a transaction to the log | |
524 | * @sdp: the filesystem | |
525 | * @tr: the transaction | |
526 | * | |
527 | * Returns: errno | |
528 | */ | |
529 | ||
530 | void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
531 | { | |
532 | log_refund(sdp, tr); | |
533 | lops_incore_commit(sdp, tr); | |
534 | ||
535 | sdp->sd_vfs->s_dirt = 1; | |
484adff8 | 536 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa | 537 | |
b3b94faa DT |
538 | gfs2_log_lock(sdp); |
539 | if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) { | |
540 | gfs2_log_unlock(sdp); | |
b09e593d | 541 | gfs2_log_flush(sdp, NULL); |
faa31ce8 | 542 | } else { |
b3b94faa | 543 | gfs2_log_unlock(sdp); |
faa31ce8 | 544 | } |
b3b94faa DT |
545 | } |
546 | ||
547 | /** | |
548 | * gfs2_log_shutdown - write a shutdown header into a journal | |
549 | * @sdp: the filesystem | |
550 | * | |
551 | */ | |
552 | ||
553 | void gfs2_log_shutdown(struct gfs2_sbd *sdp) | |
554 | { | |
484adff8 | 555 | down_write(&sdp->sd_log_flush_lock); |
b3b94faa | 556 | |
b3b94faa DT |
557 | gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved); |
558 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_gl); | |
559 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_buf); | |
18ec7d5c | 560 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
561 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
562 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg); | |
563 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_databuf); | |
190562bd | 564 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_hdrs); |
b3b94faa DT |
565 | gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list)); |
566 | ||
567 | sdp->sd_log_flush_head = sdp->sd_log_head; | |
568 | sdp->sd_log_flush_wrapped = 0; | |
569 | ||
570 | log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0); | |
571 | ||
a74604be SW |
572 | gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks); |
573 | gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail); | |
574 | gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list)); | |
b3b94faa DT |
575 | |
576 | sdp->sd_log_head = sdp->sd_log_flush_head; | |
b3b94faa DT |
577 | sdp->sd_log_tail = sdp->sd_log_head; |
578 | ||
484adff8 | 579 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
580 | } |
581 |