]>
Commit | Line | Data |
---|---|---|
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> |
7d308590 | 17 | #include <linux/lm_interface.h> |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d | 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; |
74669416 SW |
65 | struct list_head *first; |
66 | struct gfs2_ail *first_ai, *ai, *tmp; | |
67 | int done = 0; | |
b3b94faa DT |
68 | |
69 | gfs2_log_lock(sdp); | |
70 | if (list_empty(head)) { | |
71 | gfs2_log_unlock(sdp); | |
72 | return; | |
73 | } | |
74 | sync_gen = sdp->sd_ail_sync_gen++; | |
75 | ||
76 | first = head->prev; | |
77 | first_ai = list_entry(first, struct gfs2_ail, ai_list); | |
78 | first_ai->ai_sync_gen = sync_gen; | |
74669416 | 79 | gfs2_ail1_start_one(sdp, first_ai); /* This may drop log lock */ |
b3b94faa DT |
80 | |
81 | if (flags & DIO_ALL) | |
82 | first = NULL; | |
83 | ||
74669416 | 84 | while(!done) { |
484adff8 SW |
85 | if (first && (head->prev != first || |
86 | gfs2_ail1_empty_one(sdp, first_ai, 0))) | |
b3b94faa DT |
87 | break; |
88 | ||
74669416 SW |
89 | done = 1; |
90 | list_for_each_entry_safe_reverse(ai, tmp, head, ai_list) { | |
b3b94faa DT |
91 | if (ai->ai_sync_gen >= sync_gen) |
92 | continue; | |
93 | ai->ai_sync_gen = sync_gen; | |
74669416 SW |
94 | gfs2_ail1_start_one(sdp, ai); /* This may drop log lock */ |
95 | done = 0; | |
b3b94faa DT |
96 | break; |
97 | } | |
b3b94faa DT |
98 | } |
99 | ||
100 | gfs2_log_unlock(sdp); | |
101 | } | |
102 | ||
103 | int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags) | |
104 | { | |
105 | struct gfs2_ail *ai, *s; | |
106 | int ret; | |
107 | ||
108 | gfs2_log_lock(sdp); | |
109 | ||
110 | list_for_each_entry_safe_reverse(ai, s, &sdp->sd_ail1_list, ai_list) { | |
111 | if (gfs2_ail1_empty_one(sdp, ai, flags)) | |
112 | list_move(&ai->ai_list, &sdp->sd_ail2_list); | |
113 | else if (!(flags & DIO_ALL)) | |
114 | break; | |
115 | } | |
116 | ||
117 | ret = list_empty(&sdp->sd_ail1_list); | |
118 | ||
119 | gfs2_log_unlock(sdp); | |
120 | ||
121 | return ret; | |
122 | } | |
123 | ||
124 | static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) | |
125 | { | |
126 | struct gfs2_ail *ai, *safe; | |
127 | unsigned int old_tail = sdp->sd_log_tail; | |
128 | int wrap = (new_tail < old_tail); | |
129 | int a, b, rm; | |
130 | ||
131 | gfs2_log_lock(sdp); | |
132 | ||
133 | list_for_each_entry_safe(ai, safe, &sdp->sd_ail2_list, ai_list) { | |
134 | a = (old_tail <= ai->ai_first); | |
135 | b = (ai->ai_first < new_tail); | |
136 | rm = (wrap) ? (a || b) : (a && b); | |
137 | if (!rm) | |
138 | continue; | |
139 | ||
140 | gfs2_ail2_empty_one(sdp, ai); | |
141 | list_del(&ai->ai_list); | |
142 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail1_list)); | |
143 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail2_list)); | |
144 | kfree(ai); | |
145 | } | |
146 | ||
147 | gfs2_log_unlock(sdp); | |
148 | } | |
149 | ||
150 | /** | |
151 | * gfs2_log_reserve - Make a log reservation | |
152 | * @sdp: The GFS2 superblock | |
153 | * @blks: The number of blocks to reserve | |
154 | * | |
155 | * Returns: errno | |
156 | */ | |
157 | ||
158 | int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) | |
159 | { | |
b3b94faa DT |
160 | unsigned int try = 0; |
161 | ||
162 | if (gfs2_assert_warn(sdp, blks) || | |
163 | gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks)) | |
164 | return -EINVAL; | |
165 | ||
71b86f56 | 166 | mutex_lock(&sdp->sd_log_reserve_mutex); |
484adff8 SW |
167 | gfs2_log_lock(sdp); |
168 | while(sdp->sd_log_blks_free <= blks) { | |
b3b94faa | 169 | gfs2_log_unlock(sdp); |
b3b94faa | 170 | gfs2_ail1_empty(sdp, 0); |
b09e593d | 171 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
172 | |
173 | if (try++) | |
174 | gfs2_ail1_start(sdp, 0); | |
484adff8 | 175 | gfs2_log_lock(sdp); |
b3b94faa | 176 | } |
484adff8 SW |
177 | sdp->sd_log_blks_free -= blks; |
178 | gfs2_log_unlock(sdp); | |
179 | mutex_unlock(&sdp->sd_log_reserve_mutex); | |
180 | ||
181 | down_read(&sdp->sd_log_flush_lock); | |
b3b94faa DT |
182 | |
183 | return 0; | |
184 | } | |
185 | ||
186 | /** | |
187 | * gfs2_log_release - Release a given number of log blocks | |
188 | * @sdp: The GFS2 superblock | |
189 | * @blks: The number of blocks | |
190 | * | |
191 | */ | |
192 | ||
193 | void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks) | |
194 | { | |
b3b94faa DT |
195 | |
196 | gfs2_log_lock(sdp); | |
197 | sdp->sd_log_blks_free += blks; | |
198 | gfs2_assert_withdraw(sdp, | |
199 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); | |
200 | gfs2_log_unlock(sdp); | |
ed386507 | 201 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa DT |
202 | } |
203 | ||
cd915493 | 204 | static u64 log_bmap(struct gfs2_sbd *sdp, unsigned int lbn) |
b3b94faa | 205 | { |
b3b94faa | 206 | int error; |
7a6bbacb | 207 | struct buffer_head bh_map; |
b3b94faa | 208 | |
7a6bbacb SW |
209 | error = gfs2_block_map(sdp->sd_jdesc->jd_inode, lbn, 0, &bh_map, 1); |
210 | if (error || !bh_map.b_blocknr) | |
211 | printk(KERN_INFO "error=%d, dbn=%llu lbn=%u", error, bh_map.b_blocknr, lbn); | |
212 | gfs2_assert_withdraw(sdp, !error && bh_map.b_blocknr); | |
b3b94faa | 213 | |
7a6bbacb | 214 | return bh_map.b_blocknr; |
b3b94faa DT |
215 | } |
216 | ||
217 | /** | |
218 | * log_distance - Compute distance between two journal blocks | |
219 | * @sdp: The GFS2 superblock | |
220 | * @newer: The most recent journal block of the pair | |
221 | * @older: The older journal block of the pair | |
222 | * | |
223 | * Compute the distance (in the journal direction) between two | |
224 | * blocks in the journal | |
225 | * | |
226 | * Returns: the distance in blocks | |
227 | */ | |
228 | ||
faa31ce8 | 229 | static inline unsigned int log_distance(struct gfs2_sbd *sdp, unsigned int newer, |
b3b94faa DT |
230 | unsigned int older) |
231 | { | |
232 | int dist; | |
233 | ||
234 | dist = newer - older; | |
235 | if (dist < 0) | |
236 | dist += sdp->sd_jdesc->jd_blocks; | |
237 | ||
238 | return dist; | |
239 | } | |
240 | ||
241 | static unsigned int current_tail(struct gfs2_sbd *sdp) | |
242 | { | |
243 | struct gfs2_ail *ai; | |
244 | unsigned int tail; | |
245 | ||
246 | gfs2_log_lock(sdp); | |
247 | ||
faa31ce8 | 248 | if (list_empty(&sdp->sd_ail1_list)) { |
b3b94faa | 249 | tail = sdp->sd_log_head; |
faa31ce8 SW |
250 | } else { |
251 | ai = list_entry(sdp->sd_ail1_list.prev, struct gfs2_ail, ai_list); | |
b3b94faa DT |
252 | tail = ai->ai_first; |
253 | } | |
254 | ||
255 | gfs2_log_unlock(sdp); | |
256 | ||
257 | return tail; | |
258 | } | |
259 | ||
260 | static inline void log_incr_head(struct gfs2_sbd *sdp) | |
261 | { | |
262 | if (sdp->sd_log_flush_head == sdp->sd_log_tail) | |
faa31ce8 | 263 | gfs2_assert_withdraw(sdp, sdp->sd_log_flush_head == sdp->sd_log_head); |
b3b94faa DT |
264 | |
265 | if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { | |
266 | sdp->sd_log_flush_head = 0; | |
267 | sdp->sd_log_flush_wrapped = 1; | |
268 | } | |
269 | } | |
270 | ||
271 | /** | |
272 | * gfs2_log_get_buf - Get and initialize a buffer to use for log control data | |
273 | * @sdp: The GFS2 superblock | |
274 | * | |
275 | * Returns: the buffer_head | |
276 | */ | |
277 | ||
278 | struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp) | |
279 | { | |
cd915493 | 280 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
281 | struct gfs2_log_buf *lb; |
282 | struct buffer_head *bh; | |
283 | ||
4f3df041 | 284 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
285 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
286 | ||
287 | bh = lb->lb_bh = sb_getblk(sdp->sd_vfs, blkno); | |
288 | lock_buffer(bh); | |
289 | memset(bh->b_data, 0, bh->b_size); | |
290 | set_buffer_uptodate(bh); | |
291 | clear_buffer_dirty(bh); | |
292 | unlock_buffer(bh); | |
293 | ||
294 | log_incr_head(sdp); | |
295 | ||
296 | return bh; | |
297 | } | |
298 | ||
299 | /** | |
300 | * gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log | |
301 | * @sdp: the filesystem | |
302 | * @data: the data the buffer_head should point to | |
303 | * | |
304 | * Returns: the log buffer descriptor | |
305 | */ | |
306 | ||
307 | struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, | |
308 | struct buffer_head *real) | |
309 | { | |
cd915493 | 310 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
311 | struct gfs2_log_buf *lb; |
312 | struct buffer_head *bh; | |
313 | ||
4f3df041 | 314 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
315 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
316 | lb->lb_real = real; | |
317 | ||
318 | bh = lb->lb_bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL); | |
319 | atomic_set(&bh->b_count, 1); | |
320 | bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate); | |
18ec7d5c | 321 | set_bh_page(bh, real->b_page, bh_offset(real)); |
b3b94faa DT |
322 | bh->b_blocknr = blkno; |
323 | bh->b_size = sdp->sd_sb.sb_bsize; | |
324 | bh->b_bdev = sdp->sd_vfs->s_bdev; | |
325 | ||
326 | log_incr_head(sdp); | |
327 | ||
328 | return bh; | |
329 | } | |
330 | ||
331 | static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail, int pull) | |
332 | { | |
333 | unsigned int dist = log_distance(sdp, new_tail, sdp->sd_log_tail); | |
334 | ||
335 | ail2_empty(sdp, new_tail); | |
336 | ||
337 | gfs2_log_lock(sdp); | |
c5392124 | 338 | sdp->sd_log_blks_free += dist - (pull ? 1 : 0); |
faa31ce8 | 339 | gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); |
b3b94faa DT |
340 | gfs2_log_unlock(sdp); |
341 | ||
342 | sdp->sd_log_tail = new_tail; | |
343 | } | |
344 | ||
345 | /** | |
346 | * log_write_header - Get and initialize a journal header buffer | |
347 | * @sdp: The GFS2 superblock | |
348 | * | |
349 | * Returns: the initialized log buffer descriptor | |
350 | */ | |
351 | ||
cd915493 | 352 | static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull) |
b3b94faa | 353 | { |
cd915493 | 354 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
355 | struct buffer_head *bh; |
356 | struct gfs2_log_header *lh; | |
357 | unsigned int tail; | |
cd915493 | 358 | u32 hash; |
b3b94faa | 359 | |
b3b94faa DT |
360 | bh = sb_getblk(sdp->sd_vfs, blkno); |
361 | lock_buffer(bh); | |
362 | memset(bh->b_data, 0, bh->b_size); | |
363 | set_buffer_uptodate(bh); | |
364 | clear_buffer_dirty(bh); | |
365 | unlock_buffer(bh); | |
366 | ||
367 | gfs2_ail1_empty(sdp, 0); | |
368 | tail = current_tail(sdp); | |
369 | ||
370 | lh = (struct gfs2_log_header *)bh->b_data; | |
371 | memset(lh, 0, sizeof(struct gfs2_log_header)); | |
372 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
373 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); |
374 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); | |
e0f2bf78 SW |
375 | lh->lh_sequence = cpu_to_be64(sdp->sd_log_sequence++); |
376 | lh->lh_flags = cpu_to_be32(flags); | |
377 | lh->lh_tail = cpu_to_be32(tail); | |
378 | lh->lh_blkno = cpu_to_be32(sdp->sd_log_flush_head); | |
b3b94faa DT |
379 | hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header)); |
380 | lh->lh_hash = cpu_to_be32(hash); | |
381 | ||
382 | set_buffer_dirty(bh); | |
383 | if (sync_dirty_buffer(bh)) | |
384 | gfs2_io_error_bh(sdp, bh); | |
385 | brelse(bh); | |
386 | ||
387 | if (sdp->sd_log_tail != tail) | |
388 | log_pull_tail(sdp, tail, pull); | |
389 | else | |
390 | gfs2_assert_withdraw(sdp, !pull); | |
391 | ||
392 | sdp->sd_log_idle = (tail == sdp->sd_log_flush_head); | |
393 | log_incr_head(sdp); | |
394 | } | |
395 | ||
396 | static void log_flush_commit(struct gfs2_sbd *sdp) | |
397 | { | |
398 | struct list_head *head = &sdp->sd_log_flush_list; | |
399 | struct gfs2_log_buf *lb; | |
400 | struct buffer_head *bh; | |
b3b94faa DT |
401 | |
402 | while (!list_empty(head)) { | |
403 | lb = list_entry(head->next, struct gfs2_log_buf, lb_list); | |
404 | list_del(&lb->lb_list); | |
405 | bh = lb->lb_bh; | |
406 | ||
407 | wait_on_buffer(bh); | |
408 | if (!buffer_uptodate(bh)) | |
409 | gfs2_io_error_bh(sdp, bh); | |
410 | if (lb->lb_real) { | |
411 | while (atomic_read(&bh->b_count) != 1) /* Grrrr... */ | |
412 | schedule(); | |
413 | free_buffer_head(bh); | |
414 | } else | |
415 | brelse(bh); | |
416 | kfree(lb); | |
417 | } | |
418 | ||
419 | log_write_header(sdp, 0, 0); | |
420 | } | |
421 | ||
422 | /** | |
b09e593d | 423 | * gfs2_log_flush - flush incore transaction(s) |
b3b94faa DT |
424 | * @sdp: the filesystem |
425 | * @gl: The glock structure to flush. If NULL, flush the whole incore log | |
426 | * | |
427 | */ | |
428 | ||
b09e593d | 429 | void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl) |
b3b94faa DT |
430 | { |
431 | struct gfs2_ail *ai; | |
432 | ||
484adff8 | 433 | down_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
434 | |
435 | if (gl) { | |
436 | gfs2_log_lock(sdp); | |
437 | if (list_empty(&gl->gl_le.le_list)) { | |
438 | gfs2_log_unlock(sdp); | |
484adff8 | 439 | up_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
440 | return; |
441 | } | |
442 | gfs2_log_unlock(sdp); | |
443 | } | |
444 | ||
b09e593d SW |
445 | ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL); |
446 | INIT_LIST_HEAD(&ai->ai_ail1_list); | |
447 | INIT_LIST_HEAD(&ai->ai_ail2_list); | |
b3b94faa | 448 | |
faa31ce8 | 449 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_buf == sdp->sd_log_commited_buf); |
b3b94faa DT |
450 | gfs2_assert_withdraw(sdp, |
451 | sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke); | |
452 | ||
b3b94faa DT |
453 | sdp->sd_log_flush_head = sdp->sd_log_head; |
454 | sdp->sd_log_flush_wrapped = 0; | |
455 | ai->ai_first = sdp->sd_log_flush_head; | |
456 | ||
457 | lops_before_commit(sdp); | |
458 | if (!list_empty(&sdp->sd_log_flush_list)) | |
459 | log_flush_commit(sdp); | |
460 | else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle) | |
461 | log_write_header(sdp, 0, PULL); | |
462 | lops_after_commit(sdp, ai); | |
b3b94faa | 463 | sdp->sd_log_head = sdp->sd_log_flush_head; |
b09e593d | 464 | |
f4154ea0 | 465 | sdp->sd_log_blks_free -= sdp->sd_log_num_hdrs; |
b3b94faa | 466 | |
faa31ce8 SW |
467 | sdp->sd_log_blks_reserved = 0; |
468 | sdp->sd_log_commited_buf = 0; | |
469 | sdp->sd_log_num_hdrs = 0; | |
470 | sdp->sd_log_commited_revoke = 0; | |
b3b94faa DT |
471 | |
472 | gfs2_log_lock(sdp); | |
473 | if (!list_empty(&ai->ai_ail1_list)) { | |
474 | list_add(&ai->ai_list, &sdp->sd_ail1_list); | |
475 | ai = NULL; | |
476 | } | |
477 | gfs2_log_unlock(sdp); | |
478 | ||
b3b94faa | 479 | sdp->sd_vfs->s_dirt = 0; |
484adff8 | 480 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
481 | |
482 | kfree(ai); | |
483 | } | |
484 | ||
485 | static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
486 | { | |
5dc39fe6 | 487 | unsigned int reserved = 0; |
b3b94faa DT |
488 | unsigned int old; |
489 | ||
490 | gfs2_log_lock(sdp); | |
491 | ||
492 | sdp->sd_log_commited_buf += tr->tr_num_buf_new - tr->tr_num_buf_rm; | |
493 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_buf) >= 0); | |
494 | sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm; | |
495 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0); | |
496 | ||
497 | if (sdp->sd_log_commited_buf) | |
f4154ea0 | 498 | reserved += sdp->sd_log_commited_buf; |
b3b94faa DT |
499 | if (sdp->sd_log_commited_revoke) |
500 | reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke, | |
cd915493 | 501 | sizeof(u64)); |
5dc39fe6 BM |
502 | if (reserved) |
503 | reserved++; | |
b3b94faa DT |
504 | |
505 | old = sdp->sd_log_blks_free; | |
506 | sdp->sd_log_blks_free += tr->tr_reserved - | |
507 | (reserved - sdp->sd_log_blks_reserved); | |
508 | ||
b09e593d | 509 | gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old); |
b3b94faa | 510 | gfs2_assert_withdraw(sdp, |
f4154ea0 SW |
511 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks + |
512 | sdp->sd_log_num_hdrs); | |
b3b94faa DT |
513 | |
514 | sdp->sd_log_blks_reserved = reserved; | |
515 | ||
516 | gfs2_log_unlock(sdp); | |
517 | } | |
518 | ||
519 | /** | |
520 | * gfs2_log_commit - Commit a transaction to the log | |
521 | * @sdp: the filesystem | |
522 | * @tr: the transaction | |
523 | * | |
524 | * Returns: errno | |
525 | */ | |
526 | ||
527 | void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
528 | { | |
529 | log_refund(sdp, tr); | |
530 | lops_incore_commit(sdp, tr); | |
531 | ||
532 | sdp->sd_vfs->s_dirt = 1; | |
484adff8 | 533 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa | 534 | |
b3b94faa DT |
535 | gfs2_log_lock(sdp); |
536 | if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) { | |
537 | gfs2_log_unlock(sdp); | |
b09e593d | 538 | gfs2_log_flush(sdp, NULL); |
faa31ce8 | 539 | } else { |
b3b94faa | 540 | gfs2_log_unlock(sdp); |
faa31ce8 | 541 | } |
b3b94faa DT |
542 | } |
543 | ||
544 | /** | |
545 | * gfs2_log_shutdown - write a shutdown header into a journal | |
546 | * @sdp: the filesystem | |
547 | * | |
548 | */ | |
549 | ||
550 | void gfs2_log_shutdown(struct gfs2_sbd *sdp) | |
551 | { | |
484adff8 | 552 | down_write(&sdp->sd_log_flush_lock); |
b3b94faa | 553 | |
b3b94faa DT |
554 | gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved); |
555 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_gl); | |
556 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_buf); | |
18ec7d5c | 557 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
558 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
559 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg); | |
560 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_databuf); | |
190562bd | 561 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_hdrs); |
b3b94faa DT |
562 | gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list)); |
563 | ||
564 | sdp->sd_log_flush_head = sdp->sd_log_head; | |
565 | sdp->sd_log_flush_wrapped = 0; | |
566 | ||
567 | log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0); | |
568 | ||
a74604be SW |
569 | gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks); |
570 | gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail); | |
571 | gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list)); | |
b3b94faa DT |
572 | |
573 | sdp->sd_log_head = sdp->sd_log_flush_head; | |
b3b94faa DT |
574 | sdp->sd_log_tail = sdp->sd_log_head; |
575 | ||
484adff8 | 576 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
577 | } |
578 |