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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; | |
568f4c96 SW |
50 | first = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / |
51 | ssize; | |
b3b94faa DT |
52 | |
53 | if (nstruct > first) { | |
568f4c96 SW |
54 | second = (sdp->sd_sb.sb_bsize - |
55 | sizeof(struct gfs2_meta_header)) / ssize; | |
5c676f6d | 56 | blks += DIV_ROUND_UP(nstruct - first, second); |
b3b94faa DT |
57 | } |
58 | ||
59 | return blks; | |
60 | } | |
61 | ||
62 | void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags) | |
63 | { | |
64 | struct list_head *head = &sdp->sd_ail1_list; | |
cd915493 | 65 | u64 sync_gen; |
b3b94faa DT |
66 | struct list_head *first, *tmp; |
67 | struct gfs2_ail *first_ai, *ai; | |
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; | |
79 | gfs2_ail1_start_one(sdp, first_ai); | |
80 | ||
81 | if (flags & DIO_ALL) | |
82 | first = NULL; | |
83 | ||
84 | for (;;) { | |
484adff8 SW |
85 | if (first && (head->prev != first || |
86 | gfs2_ail1_empty_one(sdp, first_ai, 0))) | |
b3b94faa DT |
87 | break; |
88 | ||
89 | for (tmp = head->prev; tmp != head; tmp = tmp->prev) { | |
90 | ai = list_entry(tmp, struct gfs2_ail, ai_list); | |
91 | if (ai->ai_sync_gen >= sync_gen) | |
92 | continue; | |
93 | ai->ai_sync_gen = sync_gen; | |
94 | gfs2_ail1_start_one(sdp, ai); | |
95 | break; | |
96 | } | |
97 | ||
98 | if (tmp == head) | |
99 | break; | |
100 | } | |
101 | ||
102 | gfs2_log_unlock(sdp); | |
103 | } | |
104 | ||
105 | int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags) | |
106 | { | |
107 | struct gfs2_ail *ai, *s; | |
108 | int ret; | |
109 | ||
110 | gfs2_log_lock(sdp); | |
111 | ||
112 | list_for_each_entry_safe_reverse(ai, s, &sdp->sd_ail1_list, ai_list) { | |
113 | if (gfs2_ail1_empty_one(sdp, ai, flags)) | |
114 | list_move(&ai->ai_list, &sdp->sd_ail2_list); | |
115 | else if (!(flags & DIO_ALL)) | |
116 | break; | |
117 | } | |
118 | ||
119 | ret = list_empty(&sdp->sd_ail1_list); | |
120 | ||
121 | gfs2_log_unlock(sdp); | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
126 | static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) | |
127 | { | |
128 | struct gfs2_ail *ai, *safe; | |
129 | unsigned int old_tail = sdp->sd_log_tail; | |
130 | int wrap = (new_tail < old_tail); | |
131 | int a, b, rm; | |
132 | ||
133 | gfs2_log_lock(sdp); | |
134 | ||
135 | list_for_each_entry_safe(ai, safe, &sdp->sd_ail2_list, ai_list) { | |
136 | a = (old_tail <= ai->ai_first); | |
137 | b = (ai->ai_first < new_tail); | |
138 | rm = (wrap) ? (a || b) : (a && b); | |
139 | if (!rm) | |
140 | continue; | |
141 | ||
142 | gfs2_ail2_empty_one(sdp, ai); | |
143 | list_del(&ai->ai_list); | |
144 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail1_list)); | |
145 | gfs2_assert_warn(sdp, list_empty(&ai->ai_ail2_list)); | |
146 | kfree(ai); | |
147 | } | |
148 | ||
149 | gfs2_log_unlock(sdp); | |
150 | } | |
151 | ||
152 | /** | |
153 | * gfs2_log_reserve - Make a log reservation | |
154 | * @sdp: The GFS2 superblock | |
155 | * @blks: The number of blocks to reserve | |
156 | * | |
157 | * Returns: errno | |
158 | */ | |
159 | ||
160 | int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) | |
161 | { | |
b3b94faa DT |
162 | unsigned int try = 0; |
163 | ||
164 | if (gfs2_assert_warn(sdp, blks) || | |
165 | gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks)) | |
166 | return -EINVAL; | |
167 | ||
71b86f56 | 168 | mutex_lock(&sdp->sd_log_reserve_mutex); |
484adff8 SW |
169 | gfs2_log_lock(sdp); |
170 | while(sdp->sd_log_blks_free <= blks) { | |
b3b94faa | 171 | gfs2_log_unlock(sdp); |
b3b94faa | 172 | gfs2_ail1_empty(sdp, 0); |
b09e593d | 173 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
174 | |
175 | if (try++) | |
176 | gfs2_ail1_start(sdp, 0); | |
484adff8 | 177 | gfs2_log_lock(sdp); |
b3b94faa | 178 | } |
484adff8 SW |
179 | sdp->sd_log_blks_free -= blks; |
180 | gfs2_log_unlock(sdp); | |
181 | mutex_unlock(&sdp->sd_log_reserve_mutex); | |
182 | ||
183 | down_read(&sdp->sd_log_flush_lock); | |
b3b94faa DT |
184 | |
185 | return 0; | |
186 | } | |
187 | ||
188 | /** | |
189 | * gfs2_log_release - Release a given number of log blocks | |
190 | * @sdp: The GFS2 superblock | |
191 | * @blks: The number of blocks | |
192 | * | |
193 | */ | |
194 | ||
195 | void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks) | |
196 | { | |
b3b94faa DT |
197 | |
198 | gfs2_log_lock(sdp); | |
199 | sdp->sd_log_blks_free += blks; | |
200 | gfs2_assert_withdraw(sdp, | |
201 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); | |
202 | gfs2_log_unlock(sdp); | |
ed386507 | 203 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa DT |
204 | } |
205 | ||
cd915493 | 206 | static u64 log_bmap(struct gfs2_sbd *sdp, unsigned int lbn) |
b3b94faa DT |
207 | { |
208 | int new = 0; | |
cd915493 | 209 | u64 dbn; |
b3b94faa | 210 | int error; |
fd88de56 | 211 | int bdy; |
b3b94faa | 212 | |
fd88de56 | 213 | error = gfs2_block_map(sdp->sd_jdesc->jd_inode, lbn, &new, &dbn, &bdy); |
a67cdbd4 | 214 | if (error || !dbn) |
fd4de2d4 | 215 | printk(KERN_INFO "error=%d, dbn=%llu lbn=%u", error, (unsigned long long)dbn, lbn); |
b3b94faa DT |
216 | gfs2_assert_withdraw(sdp, !error && dbn); |
217 | ||
218 | return dbn; | |
219 | } | |
220 | ||
221 | /** | |
222 | * log_distance - Compute distance between two journal blocks | |
223 | * @sdp: The GFS2 superblock | |
224 | * @newer: The most recent journal block of the pair | |
225 | * @older: The older journal block of the pair | |
226 | * | |
227 | * Compute the distance (in the journal direction) between two | |
228 | * blocks in the journal | |
229 | * | |
230 | * Returns: the distance in blocks | |
231 | */ | |
232 | ||
233 | static inline unsigned int log_distance(struct gfs2_sbd *sdp, | |
234 | unsigned int newer, | |
235 | unsigned int older) | |
236 | { | |
237 | int dist; | |
238 | ||
239 | dist = newer - older; | |
240 | if (dist < 0) | |
241 | dist += sdp->sd_jdesc->jd_blocks; | |
242 | ||
243 | return dist; | |
244 | } | |
245 | ||
246 | static unsigned int current_tail(struct gfs2_sbd *sdp) | |
247 | { | |
248 | struct gfs2_ail *ai; | |
249 | unsigned int tail; | |
250 | ||
251 | gfs2_log_lock(sdp); | |
252 | ||
253 | if (list_empty(&sdp->sd_ail1_list)) | |
254 | tail = sdp->sd_log_head; | |
255 | else { | |
59a1cc6b SW |
256 | ai = list_entry(sdp->sd_ail1_list.prev, struct gfs2_ail, |
257 | ai_list); | |
b3b94faa DT |
258 | tail = ai->ai_first; |
259 | } | |
260 | ||
261 | gfs2_log_unlock(sdp); | |
262 | ||
263 | return tail; | |
264 | } | |
265 | ||
266 | static inline void log_incr_head(struct gfs2_sbd *sdp) | |
267 | { | |
268 | if (sdp->sd_log_flush_head == sdp->sd_log_tail) | |
269 | gfs2_assert_withdraw(sdp, | |
270 | sdp->sd_log_flush_head == sdp->sd_log_head); | |
271 | ||
272 | if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { | |
273 | sdp->sd_log_flush_head = 0; | |
274 | sdp->sd_log_flush_wrapped = 1; | |
275 | } | |
276 | } | |
277 | ||
278 | /** | |
279 | * gfs2_log_get_buf - Get and initialize a buffer to use for log control data | |
280 | * @sdp: The GFS2 superblock | |
281 | * | |
282 | * Returns: the buffer_head | |
283 | */ | |
284 | ||
285 | struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp) | |
286 | { | |
cd915493 | 287 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
288 | struct gfs2_log_buf *lb; |
289 | struct buffer_head *bh; | |
290 | ||
4f3df041 | 291 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
292 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
293 | ||
294 | bh = lb->lb_bh = sb_getblk(sdp->sd_vfs, blkno); | |
295 | lock_buffer(bh); | |
296 | memset(bh->b_data, 0, bh->b_size); | |
297 | set_buffer_uptodate(bh); | |
298 | clear_buffer_dirty(bh); | |
299 | unlock_buffer(bh); | |
300 | ||
301 | log_incr_head(sdp); | |
302 | ||
303 | return bh; | |
304 | } | |
305 | ||
306 | /** | |
307 | * gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log | |
308 | * @sdp: the filesystem | |
309 | * @data: the data the buffer_head should point to | |
310 | * | |
311 | * Returns: the log buffer descriptor | |
312 | */ | |
313 | ||
314 | struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, | |
315 | struct buffer_head *real) | |
316 | { | |
cd915493 | 317 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
318 | struct gfs2_log_buf *lb; |
319 | struct buffer_head *bh; | |
320 | ||
4f3df041 | 321 | lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
322 | list_add(&lb->lb_list, &sdp->sd_log_flush_list); |
323 | lb->lb_real = real; | |
324 | ||
325 | bh = lb->lb_bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL); | |
326 | atomic_set(&bh->b_count, 1); | |
327 | bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate); | |
18ec7d5c | 328 | set_bh_page(bh, real->b_page, bh_offset(real)); |
b3b94faa DT |
329 | bh->b_blocknr = blkno; |
330 | bh->b_size = sdp->sd_sb.sb_bsize; | |
331 | bh->b_bdev = sdp->sd_vfs->s_bdev; | |
332 | ||
333 | log_incr_head(sdp); | |
334 | ||
335 | return bh; | |
336 | } | |
337 | ||
338 | static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail, int pull) | |
339 | { | |
340 | unsigned int dist = log_distance(sdp, new_tail, sdp->sd_log_tail); | |
341 | ||
342 | ail2_empty(sdp, new_tail); | |
343 | ||
344 | gfs2_log_lock(sdp); | |
345 | sdp->sd_log_blks_free += dist - ((pull) ? 1 : 0); | |
b09e593d | 346 | /* printk(KERN_INFO "pull tail refunding %u blocks (%u left) pull=%d\n", dist - ((pull) ? 1 : 0), sdp->sd_log_blks_free, pull); */ |
b3b94faa DT |
347 | gfs2_assert_withdraw(sdp, |
348 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks); | |
349 | gfs2_log_unlock(sdp); | |
350 | ||
351 | sdp->sd_log_tail = new_tail; | |
352 | } | |
353 | ||
354 | /** | |
355 | * log_write_header - Get and initialize a journal header buffer | |
356 | * @sdp: The GFS2 superblock | |
357 | * | |
358 | * Returns: the initialized log buffer descriptor | |
359 | */ | |
360 | ||
cd915493 | 361 | static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull) |
b3b94faa | 362 | { |
cd915493 | 363 | u64 blkno = log_bmap(sdp, sdp->sd_log_flush_head); |
b3b94faa DT |
364 | struct buffer_head *bh; |
365 | struct gfs2_log_header *lh; | |
366 | unsigned int tail; | |
cd915493 | 367 | u32 hash; |
b3b94faa | 368 | |
b09e593d SW |
369 | /* printk(KERN_INFO "log write header start (flags=%08x, pull=%d)\n", flags, pull); */ |
370 | ||
b3b94faa DT |
371 | bh = sb_getblk(sdp->sd_vfs, blkno); |
372 | lock_buffer(bh); | |
373 | memset(bh->b_data, 0, bh->b_size); | |
374 | set_buffer_uptodate(bh); | |
375 | clear_buffer_dirty(bh); | |
376 | unlock_buffer(bh); | |
377 | ||
378 | gfs2_ail1_empty(sdp, 0); | |
379 | tail = current_tail(sdp); | |
380 | ||
381 | lh = (struct gfs2_log_header *)bh->b_data; | |
382 | memset(lh, 0, sizeof(struct gfs2_log_header)); | |
383 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
384 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); |
385 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); | |
e0f2bf78 SW |
386 | lh->lh_sequence = cpu_to_be64(sdp->sd_log_sequence++); |
387 | lh->lh_flags = cpu_to_be32(flags); | |
388 | lh->lh_tail = cpu_to_be32(tail); | |
389 | lh->lh_blkno = cpu_to_be32(sdp->sd_log_flush_head); | |
b3b94faa DT |
390 | hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header)); |
391 | lh->lh_hash = cpu_to_be32(hash); | |
392 | ||
393 | set_buffer_dirty(bh); | |
394 | if (sync_dirty_buffer(bh)) | |
395 | gfs2_io_error_bh(sdp, bh); | |
396 | brelse(bh); | |
397 | ||
398 | if (sdp->sd_log_tail != tail) | |
399 | log_pull_tail(sdp, tail, pull); | |
400 | else | |
401 | gfs2_assert_withdraw(sdp, !pull); | |
402 | ||
403 | sdp->sd_log_idle = (tail == sdp->sd_log_flush_head); | |
404 | log_incr_head(sdp); | |
b09e593d SW |
405 | |
406 | /* printk(KERN_INFO "log write header out\n"); */ | |
b3b94faa DT |
407 | } |
408 | ||
409 | static void log_flush_commit(struct gfs2_sbd *sdp) | |
410 | { | |
411 | struct list_head *head = &sdp->sd_log_flush_list; | |
412 | struct gfs2_log_buf *lb; | |
413 | struct buffer_head *bh; | |
b3b94faa DT |
414 | |
415 | while (!list_empty(head)) { | |
416 | lb = list_entry(head->next, struct gfs2_log_buf, lb_list); | |
417 | list_del(&lb->lb_list); | |
418 | bh = lb->lb_bh; | |
419 | ||
420 | wait_on_buffer(bh); | |
421 | if (!buffer_uptodate(bh)) | |
422 | gfs2_io_error_bh(sdp, bh); | |
423 | if (lb->lb_real) { | |
424 | while (atomic_read(&bh->b_count) != 1) /* Grrrr... */ | |
425 | schedule(); | |
426 | free_buffer_head(bh); | |
427 | } else | |
428 | brelse(bh); | |
429 | kfree(lb); | |
430 | } | |
431 | ||
432 | log_write_header(sdp, 0, 0); | |
433 | } | |
434 | ||
435 | /** | |
b09e593d | 436 | * gfs2_log_flush - flush incore transaction(s) |
b3b94faa DT |
437 | * @sdp: the filesystem |
438 | * @gl: The glock structure to flush. If NULL, flush the whole incore log | |
439 | * | |
440 | */ | |
441 | ||
b09e593d | 442 | void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl) |
b3b94faa DT |
443 | { |
444 | struct gfs2_ail *ai; | |
445 | ||
484adff8 | 446 | down_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
447 | |
448 | if (gl) { | |
449 | gfs2_log_lock(sdp); | |
450 | if (list_empty(&gl->gl_le.le_list)) { | |
451 | gfs2_log_unlock(sdp); | |
484adff8 | 452 | up_write(&sdp->sd_log_flush_lock); |
f55ab26a SW |
453 | return; |
454 | } | |
455 | gfs2_log_unlock(sdp); | |
456 | } | |
457 | ||
b09e593d SW |
458 | ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL); |
459 | INIT_LIST_HEAD(&ai->ai_ail1_list); | |
460 | INIT_LIST_HEAD(&ai->ai_ail2_list); | |
b3b94faa DT |
461 | |
462 | gfs2_assert_withdraw(sdp, | |
463 | sdp->sd_log_num_buf == sdp->sd_log_commited_buf); | |
464 | gfs2_assert_withdraw(sdp, | |
465 | sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke); | |
466 | ||
b3b94faa DT |
467 | sdp->sd_log_flush_head = sdp->sd_log_head; |
468 | sdp->sd_log_flush_wrapped = 0; | |
469 | ai->ai_first = sdp->sd_log_flush_head; | |
470 | ||
471 | lops_before_commit(sdp); | |
472 | if (!list_empty(&sdp->sd_log_flush_list)) | |
473 | log_flush_commit(sdp); | |
474 | else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle) | |
475 | log_write_header(sdp, 0, PULL); | |
476 | lops_after_commit(sdp, ai); | |
b3b94faa | 477 | sdp->sd_log_head = sdp->sd_log_flush_head; |
b09e593d SW |
478 | |
479 | /* printk(KERN_INFO "sd_log_num_hdrs %u\n", sdp->sd_log_num_hdrs); */ | |
f4154ea0 | 480 | sdp->sd_log_blks_free -= sdp->sd_log_num_hdrs; |
b3b94faa DT |
481 | |
482 | sdp->sd_log_blks_reserved = | |
483 | sdp->sd_log_commited_buf = | |
b09e593d | 484 | sdp->sd_log_num_hdrs = |
b3b94faa DT |
485 | sdp->sd_log_commited_revoke = 0; |
486 | ||
487 | gfs2_log_lock(sdp); | |
488 | if (!list_empty(&ai->ai_ail1_list)) { | |
489 | list_add(&ai->ai_list, &sdp->sd_ail1_list); | |
490 | ai = NULL; | |
491 | } | |
492 | gfs2_log_unlock(sdp); | |
493 | ||
b3b94faa | 494 | sdp->sd_vfs->s_dirt = 0; |
484adff8 | 495 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
496 | |
497 | kfree(ai); | |
498 | } | |
499 | ||
500 | static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
501 | { | |
5dc39fe6 | 502 | unsigned int reserved = 0; |
b3b94faa DT |
503 | unsigned int old; |
504 | ||
505 | gfs2_log_lock(sdp); | |
506 | ||
507 | sdp->sd_log_commited_buf += tr->tr_num_buf_new - tr->tr_num_buf_rm; | |
508 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_buf) >= 0); | |
509 | sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm; | |
510 | gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0); | |
511 | ||
512 | if (sdp->sd_log_commited_buf) | |
f4154ea0 | 513 | reserved += sdp->sd_log_commited_buf; |
b3b94faa DT |
514 | if (sdp->sd_log_commited_revoke) |
515 | reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke, | |
cd915493 | 516 | sizeof(u64)); |
5dc39fe6 BM |
517 | if (reserved) |
518 | reserved++; | |
b3b94faa DT |
519 | |
520 | old = sdp->sd_log_blks_free; | |
521 | sdp->sd_log_blks_free += tr->tr_reserved - | |
522 | (reserved - sdp->sd_log_blks_reserved); | |
523 | ||
b09e593d | 524 | gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old); |
b3b94faa | 525 | gfs2_assert_withdraw(sdp, |
f4154ea0 SW |
526 | sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks + |
527 | sdp->sd_log_num_hdrs); | |
b3b94faa DT |
528 | |
529 | sdp->sd_log_blks_reserved = reserved; | |
530 | ||
531 | gfs2_log_unlock(sdp); | |
532 | } | |
533 | ||
534 | /** | |
535 | * gfs2_log_commit - Commit a transaction to the log | |
536 | * @sdp: the filesystem | |
537 | * @tr: the transaction | |
538 | * | |
539 | * Returns: errno | |
540 | */ | |
541 | ||
542 | void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
543 | { | |
544 | log_refund(sdp, tr); | |
545 | lops_incore_commit(sdp, tr); | |
546 | ||
547 | sdp->sd_vfs->s_dirt = 1; | |
484adff8 | 548 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa | 549 | |
b3b94faa DT |
550 | gfs2_log_lock(sdp); |
551 | if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) { | |
552 | gfs2_log_unlock(sdp); | |
b09e593d | 553 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
554 | } else |
555 | gfs2_log_unlock(sdp); | |
556 | } | |
557 | ||
558 | /** | |
559 | * gfs2_log_shutdown - write a shutdown header into a journal | |
560 | * @sdp: the filesystem | |
561 | * | |
562 | */ | |
563 | ||
564 | void gfs2_log_shutdown(struct gfs2_sbd *sdp) | |
565 | { | |
484adff8 | 566 | down_write(&sdp->sd_log_flush_lock); |
b3b94faa | 567 | |
b3b94faa DT |
568 | gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved); |
569 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_gl); | |
570 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_buf); | |
18ec7d5c | 571 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
572 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
573 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg); | |
574 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_databuf); | |
190562bd | 575 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_hdrs); |
b3b94faa DT |
576 | gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list)); |
577 | ||
578 | sdp->sd_log_flush_head = sdp->sd_log_head; | |
579 | sdp->sd_log_flush_wrapped = 0; | |
580 | ||
581 | log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0); | |
582 | ||
f4154ea0 | 583 | /* printk(KERN_INFO "sd_log_blks_free %u, sd_jdesc->jd_blocks %u\n", sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); */ |
a74604be SW |
584 | gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks); |
585 | gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail); | |
586 | gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list)); | |
b3b94faa DT |
587 | |
588 | sdp->sd_log_head = sdp->sd_log_flush_head; | |
b3b94faa DT |
589 | sdp->sd_log_tail = sdp->sd_log_head; |
590 | ||
484adff8 | 591 | up_write(&sdp->sd_log_flush_lock); |
b3b94faa DT |
592 | } |
593 |