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> |
c969f58c SW |
16 | #include <linux/bio.h> |
17 | #include <linux/fs.h> | |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d | 20 | #include "incore.h" |
2332c443 | 21 | #include "inode.h" |
b3b94faa DT |
22 | #include "glock.h" |
23 | #include "log.h" | |
24 | #include "lops.h" | |
25 | #include "meta_io.h" | |
26 | #include "recovery.h" | |
27 | #include "rgrp.h" | |
28 | #include "trans.h" | |
5c676f6d | 29 | #include "util.h" |
63997775 | 30 | #include "trace_gfs2.h" |
b3b94faa | 31 | |
9b9107a5 SW |
32 | /** |
33 | * gfs2_pin - Pin a buffer in memory | |
34 | * @sdp: The superblock | |
35 | * @bh: The buffer to be pinned | |
36 | * | |
37 | * The log lock must be held when calling this function | |
38 | */ | |
39 | static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) | |
40 | { | |
41 | struct gfs2_bufdata *bd; | |
42 | ||
43 | gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); | |
44 | ||
45 | clear_buffer_dirty(bh); | |
46 | if (test_set_buffer_pinned(bh)) | |
47 | gfs2_assert_withdraw(sdp, 0); | |
48 | if (!buffer_uptodate(bh)) | |
49 | gfs2_io_error_bh(sdp, bh); | |
50 | bd = bh->b_private; | |
51 | /* If this buffer is in the AIL and it has already been written | |
52 | * to in-place disk block, remove it from the AIL. | |
53 | */ | |
c618e87a | 54 | spin_lock(&sdp->sd_ail_lock); |
9b9107a5 SW |
55 | if (bd->bd_ail) |
56 | list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); | |
c618e87a | 57 | spin_unlock(&sdp->sd_ail_lock); |
9b9107a5 | 58 | get_bh(bh); |
5e687eac | 59 | atomic_inc(&sdp->sd_log_pinned); |
63997775 | 60 | trace_gfs2_pin(bd, 1); |
9b9107a5 SW |
61 | } |
62 | ||
63 | /** | |
64 | * gfs2_unpin - Unpin a buffer | |
65 | * @sdp: the filesystem the buffer belongs to | |
66 | * @bh: The buffer to unpin | |
67 | * @ai: | |
68 | * | |
69 | */ | |
70 | ||
71 | static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, | |
72 | struct gfs2_ail *ai) | |
73 | { | |
74 | struct gfs2_bufdata *bd = bh->b_private; | |
75 | ||
76 | gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); | |
77 | ||
78 | if (!buffer_pinned(bh)) | |
79 | gfs2_assert_withdraw(sdp, 0); | |
80 | ||
81 | lock_buffer(bh); | |
82 | mark_buffer_dirty(bh); | |
83 | clear_buffer_pinned(bh); | |
84 | ||
d6a079e8 | 85 | spin_lock(&sdp->sd_ail_lock); |
9b9107a5 SW |
86 | if (bd->bd_ail) { |
87 | list_del(&bd->bd_ail_st_list); | |
88 | brelse(bh); | |
89 | } else { | |
90 | struct gfs2_glock *gl = bd->bd_gl; | |
91 | list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); | |
92 | atomic_inc(&gl->gl_ail_count); | |
93 | } | |
94 | bd->bd_ail = ai; | |
95 | list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); | |
d6a079e8 DC |
96 | spin_unlock(&sdp->sd_ail_lock); |
97 | ||
bc015cb8 SW |
98 | if (test_and_clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags)) |
99 | gfs2_glock_schedule_for_reclaim(bd->bd_gl); | |
63997775 | 100 | trace_gfs2_pin(bd, 0); |
9b9107a5 | 101 | unlock_buffer(bh); |
5e687eac | 102 | atomic_dec(&sdp->sd_log_pinned); |
9b9107a5 SW |
103 | } |
104 | ||
16615be1 SW |
105 | |
106 | static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh) | |
107 | { | |
108 | return (struct gfs2_log_descriptor *)bh->b_data; | |
109 | } | |
110 | ||
111 | static inline __be64 *bh_log_ptr(struct buffer_head *bh) | |
112 | { | |
113 | struct gfs2_log_descriptor *ld = bh_log_desc(bh); | |
114 | return (__force __be64 *)(ld + 1); | |
115 | } | |
116 | ||
117 | static inline __be64 *bh_ptr_end(struct buffer_head *bh) | |
118 | { | |
119 | return (__force __be64 *)(bh->b_data + bh->b_size); | |
120 | } | |
121 | ||
122 | ||
123 | static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) | |
124 | { | |
125 | struct buffer_head *bh = gfs2_log_get_buf(sdp); | |
126 | struct gfs2_log_descriptor *ld = bh_log_desc(bh); | |
127 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
128 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); | |
129 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
130 | ld->ld_type = cpu_to_be32(ld_type); | |
131 | ld->ld_length = 0; | |
132 | ld->ld_data1 = 0; | |
133 | ld->ld_data2 = 0; | |
134 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
135 | return bh; | |
136 | } | |
137 | ||
b3b94faa DT |
138 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
139 | { | |
140 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
0ab7d13f | 141 | struct gfs2_meta_header *mh; |
b3b94faa DT |
142 | struct gfs2_trans *tr; |
143 | ||
9b9107a5 | 144 | lock_buffer(bd->bd_bh); |
8bd95727 | 145 | gfs2_log_lock(sdp); |
9b9107a5 SW |
146 | if (!list_empty(&bd->bd_list_tr)) |
147 | goto out; | |
5c676f6d | 148 | tr = current->journal_info; |
b3b94faa DT |
149 | tr->tr_touched = 1; |
150 | tr->tr_num_buf++; | |
151 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
b3b94faa | 152 | if (!list_empty(&le->le_list)) |
9b9107a5 | 153 | goto out; |
2bcd610d SW |
154 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
155 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
b3b94faa | 156 | gfs2_meta_check(sdp, bd->bd_bh); |
a98ab220 | 157 | gfs2_pin(sdp, bd->bd_bh); |
0ab7d13f SW |
158 | mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; |
159 | mh->__pad0 = cpu_to_be64(0); | |
160 | mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); | |
b3b94faa DT |
161 | sdp->sd_log_num_buf++; |
162 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
b3b94faa | 163 | tr->tr_num_buf_new++; |
9b9107a5 SW |
164 | out: |
165 | gfs2_log_unlock(sdp); | |
166 | unlock_buffer(bd->bd_bh); | |
b3b94faa DT |
167 | } |
168 | ||
b3b94faa DT |
169 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) |
170 | { | |
171 | struct buffer_head *bh; | |
172 | struct gfs2_log_descriptor *ld; | |
173 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
905d2aef | 174 | unsigned int total; |
b3b94faa DT |
175 | unsigned int limit; |
176 | unsigned int num; | |
177 | unsigned n; | |
178 | __be64 *ptr; | |
179 | ||
2332c443 | 180 | limit = buf_limit(sdp); |
b3b94faa DT |
181 | /* for 4k blocks, limit = 503 */ |
182 | ||
905d2aef BP |
183 | gfs2_log_lock(sdp); |
184 | total = sdp->sd_log_num_buf; | |
b3b94faa DT |
185 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); |
186 | while(total) { | |
187 | num = total; | |
188 | if (total > limit) | |
189 | num = limit; | |
905d2aef | 190 | gfs2_log_unlock(sdp); |
16615be1 | 191 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); |
905d2aef | 192 | gfs2_log_lock(sdp); |
16615be1 SW |
193 | ld = bh_log_desc(bh); |
194 | ptr = bh_log_ptr(bh); | |
b3b94faa DT |
195 | ld->ld_length = cpu_to_be32(num + 1); |
196 | ld->ld_data1 = cpu_to_be32(num); | |
b3b94faa DT |
197 | |
198 | n = 0; | |
568f4c96 SW |
199 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
200 | bd_le.le_list) { | |
b3b94faa DT |
201 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
202 | if (++n >= num) | |
203 | break; | |
204 | } | |
205 | ||
905d2aef | 206 | gfs2_log_unlock(sdp); |
721a9602 | 207 | submit_bh(WRITE_SYNC, bh); |
905d2aef | 208 | gfs2_log_lock(sdp); |
b3b94faa DT |
209 | |
210 | n = 0; | |
568f4c96 SW |
211 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
212 | bd_le.le_list) { | |
16615be1 | 213 | get_bh(bd2->bd_bh); |
905d2aef | 214 | gfs2_log_unlock(sdp); |
16615be1 | 215 | lock_buffer(bd2->bd_bh); |
b3b94faa | 216 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
721a9602 | 217 | submit_bh(WRITE_SYNC, bh); |
905d2aef | 218 | gfs2_log_lock(sdp); |
b3b94faa DT |
219 | if (++n >= num) |
220 | break; | |
221 | } | |
222 | ||
905d2aef | 223 | BUG_ON(total < num); |
b3b94faa DT |
224 | total -= num; |
225 | } | |
905d2aef | 226 | gfs2_log_unlock(sdp); |
b3b94faa DT |
227 | } |
228 | ||
229 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
230 | { | |
231 | struct list_head *head = &sdp->sd_log_le_buf; | |
232 | struct gfs2_bufdata *bd; | |
233 | ||
234 | while (!list_empty(head)) { | |
235 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
236 | list_del_init(&bd->bd_le.le_list); | |
237 | sdp->sd_log_num_buf--; | |
238 | ||
a98ab220 | 239 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
240 | } |
241 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
242 | } | |
243 | ||
244 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 245 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 246 | { |
feaa7bba | 247 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
248 | |
249 | if (pass != 0) | |
250 | return; | |
251 | ||
252 | sdp->sd_found_blocks = 0; | |
253 | sdp->sd_replayed_blocks = 0; | |
254 | } | |
255 | ||
256 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
257 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
258 | int pass) | |
259 | { | |
feaa7bba SW |
260 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
261 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 262 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
263 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
264 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 265 | u64 blkno; |
b3b94faa DT |
266 | int error = 0; |
267 | ||
268 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
269 | return 0; | |
270 | ||
271 | gfs2_replay_incr_blk(sdp, &start); | |
272 | ||
273 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
274 | blkno = be64_to_cpu(*ptr++); | |
275 | ||
276 | sdp->sd_found_blocks++; | |
277 | ||
278 | if (gfs2_revoke_check(sdp, blkno, start)) | |
279 | continue; | |
280 | ||
281 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
282 | if (error) |
283 | return error; | |
b3b94faa DT |
284 | |
285 | bh_ip = gfs2_meta_new(gl, blkno); | |
286 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
287 | ||
288 | if (gfs2_meta_check(sdp, bh_ip)) | |
289 | error = -EIO; | |
290 | else | |
291 | mark_buffer_dirty(bh_ip); | |
292 | ||
293 | brelse(bh_log); | |
294 | brelse(bh_ip); | |
295 | ||
296 | if (error) | |
297 | break; | |
298 | ||
299 | sdp->sd_replayed_blocks++; | |
300 | } | |
301 | ||
302 | return error; | |
303 | } | |
304 | ||
305 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
306 | { | |
feaa7bba SW |
307 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
308 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
309 | |
310 | if (error) { | |
7276b3b0 | 311 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
312 | return; |
313 | } | |
314 | if (pass != 1) | |
315 | return; | |
316 | ||
7276b3b0 | 317 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
318 | |
319 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
320 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
321 | } | |
322 | ||
323 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
324 | { | |
325 | struct gfs2_trans *tr; | |
326 | ||
5c676f6d | 327 | tr = current->journal_info; |
b3b94faa DT |
328 | tr->tr_touched = 1; |
329 | tr->tr_num_revoke++; | |
b3b94faa DT |
330 | sdp->sd_log_num_revoke++; |
331 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
b3b94faa DT |
332 | } |
333 | ||
334 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
335 | { | |
336 | struct gfs2_log_descriptor *ld; | |
337 | struct gfs2_meta_header *mh; | |
338 | struct buffer_head *bh; | |
339 | unsigned int offset; | |
340 | struct list_head *head = &sdp->sd_log_le_revoke; | |
82e86087 | 341 | struct gfs2_bufdata *bd; |
b3b94faa DT |
342 | |
343 | if (!sdp->sd_log_num_revoke) | |
344 | return; | |
345 | ||
16615be1 SW |
346 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); |
347 | ld = bh_log_desc(bh); | |
568f4c96 | 348 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
cd915493 | 349 | sizeof(u64))); |
b3b94faa | 350 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
b3b94faa DT |
351 | offset = sizeof(struct gfs2_log_descriptor); |
352 | ||
353 | while (!list_empty(head)) { | |
82e86087 SW |
354 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); |
355 | list_del_init(&bd->bd_le.le_list); | |
b3b94faa DT |
356 | sdp->sd_log_num_revoke--; |
357 | ||
cd915493 | 358 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
721a9602 | 359 | submit_bh(WRITE_SYNC, bh); |
b3b94faa DT |
360 | |
361 | bh = gfs2_log_get_buf(sdp); | |
362 | mh = (struct gfs2_meta_header *)bh->b_data; | |
363 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
364 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
365 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
366 | offset = sizeof(struct gfs2_meta_header); |
367 | } | |
368 | ||
82e86087 | 369 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno); |
0820ab51 | 370 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
b3b94faa | 371 | |
cd915493 | 372 | offset += sizeof(u64); |
b3b94faa DT |
373 | } |
374 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
375 | ||
721a9602 | 376 | submit_bh(WRITE_SYNC, bh); |
b3b94faa DT |
377 | } |
378 | ||
379 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 380 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 381 | { |
feaa7bba | 382 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
383 | |
384 | if (pass != 0) | |
385 | return; | |
386 | ||
387 | sdp->sd_found_revokes = 0; | |
388 | sdp->sd_replay_tail = head->lh_tail; | |
389 | } | |
390 | ||
391 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
392 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
393 | int pass) | |
394 | { | |
feaa7bba | 395 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
396 | unsigned int blks = be32_to_cpu(ld->ld_length); |
397 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
398 | struct buffer_head *bh; | |
399 | unsigned int offset; | |
cd915493 | 400 | u64 blkno; |
b3b94faa DT |
401 | int first = 1; |
402 | int error; | |
403 | ||
404 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
405 | return 0; | |
406 | ||
407 | offset = sizeof(struct gfs2_log_descriptor); | |
408 | ||
409 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
410 | error = gfs2_replay_read_block(jd, start, &bh); | |
411 | if (error) | |
412 | return error; | |
413 | ||
414 | if (!first) | |
415 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
416 | ||
cd915493 | 417 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
418 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
419 | ||
420 | error = gfs2_revoke_add(sdp, blkno, start); | |
3ad62e87 BP |
421 | if (error < 0) { |
422 | brelse(bh); | |
b3b94faa | 423 | return error; |
3ad62e87 | 424 | } |
b3b94faa DT |
425 | else if (error) |
426 | sdp->sd_found_revokes++; | |
427 | ||
428 | if (!--revokes) | |
429 | break; | |
cd915493 | 430 | offset += sizeof(u64); |
b3b94faa DT |
431 | } |
432 | ||
433 | brelse(bh); | |
434 | offset = sizeof(struct gfs2_meta_header); | |
435 | first = 0; | |
436 | } | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
442 | { | |
feaa7bba | 443 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
444 | |
445 | if (error) { | |
446 | gfs2_revoke_clean(sdp); | |
447 | return; | |
448 | } | |
449 | if (pass != 1) | |
450 | return; | |
451 | ||
452 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
453 | jd->jd_jid, sdp->sd_found_revokes); | |
454 | ||
455 | gfs2_revoke_clean(sdp); | |
456 | } | |
457 | ||
458 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
459 | { | |
460 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 461 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 462 | |
5c676f6d | 463 | tr->tr_touched = 1; |
b3b94faa | 464 | |
b3b94faa | 465 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); |
b3b94faa DT |
466 | |
467 | gfs2_log_lock(sdp); | |
68835625 BM |
468 | if (!list_empty(&le->le_list)){ |
469 | gfs2_log_unlock(sdp); | |
470 | return; | |
471 | } | |
472 | gfs2_rgrp_bh_hold(rgd); | |
b3b94faa DT |
473 | sdp->sd_log_num_rg++; |
474 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
907b9bce | 475 | gfs2_log_unlock(sdp); |
b3b94faa DT |
476 | } |
477 | ||
478 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
479 | { | |
480 | struct list_head *head = &sdp->sd_log_le_rg; | |
481 | struct gfs2_rgrpd *rgd; | |
482 | ||
483 | while (!list_empty(head)) { | |
484 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
485 | list_del_init(&rgd->rd_le.le_list); | |
486 | sdp->sd_log_num_rg--; | |
487 | ||
488 | gfs2_rgrp_repolish_clones(rgd); | |
489 | gfs2_rgrp_bh_put(rgd); | |
490 | } | |
491 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
492 | } | |
493 | ||
18ec7d5c SW |
494 | /** |
495 | * databuf_lo_add - Add a databuf to the transaction. | |
496 | * | |
497 | * This is used in two distinct cases: | |
498 | * i) In ordered write mode | |
499 | * We put the data buffer on a list so that we can ensure that its | |
500 | * synced to disk at the right time | |
501 | * ii) In journaled data mode | |
502 | * We need to journal the data block in the same way as metadata in | |
503 | * the functions above. The difference is that here we have a tag | |
504 | * which is two __be64's being the block number (as per meta data) | |
505 | * and a flag which says whether the data block needs escaping or | |
506 | * not. This means we need a new log entry for each 251 or so data | |
507 | * blocks, which isn't an enormous overhead but twice as much as | |
508 | * for normal metadata blocks. | |
509 | */ | |
b3b94faa DT |
510 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
511 | { | |
18ec7d5c | 512 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 513 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 514 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 515 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 516 | |
9b9107a5 | 517 | lock_buffer(bd->bd_bh); |
8bd95727 | 518 | gfs2_log_lock(sdp); |
9ff8ec32 SW |
519 | if (tr) { |
520 | if (!list_empty(&bd->bd_list_tr)) | |
521 | goto out; | |
522 | tr->tr_touched = 1; | |
523 | if (gfs2_is_jdata(ip)) { | |
524 | tr->tr_num_buf++; | |
525 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
526 | } | |
773ed1a0 | 527 | } |
2332c443 | 528 | if (!list_empty(&le->le_list)) |
9b9107a5 | 529 | goto out; |
2332c443 | 530 | |
2bcd610d SW |
531 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
532 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
2332c443 | 533 | if (gfs2_is_jdata(ip)) { |
2332c443 RP |
534 | gfs2_pin(sdp, bd->bd_bh); |
535 | tr->tr_num_databuf_new++; | |
d7b616e2 | 536 | sdp->sd_log_num_databuf++; |
e5884636 | 537 | list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); |
d7b616e2 | 538 | } else { |
e5884636 | 539 | list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); |
9b9107a5 | 540 | } |
9b9107a5 | 541 | out: |
b3b94faa | 542 | gfs2_log_unlock(sdp); |
9b9107a5 | 543 | unlock_buffer(bd->bd_bh); |
b3b94faa DT |
544 | } |
545 | ||
16615be1 | 546 | static void gfs2_check_magic(struct buffer_head *bh) |
18ec7d5c | 547 | { |
18ec7d5c SW |
548 | void *kaddr; |
549 | __be32 *ptr; | |
18ec7d5c | 550 | |
16615be1 SW |
551 | clear_buffer_escaped(bh); |
552 | kaddr = kmap_atomic(bh->b_page, KM_USER0); | |
18ec7d5c SW |
553 | ptr = kaddr + bh_offset(bh); |
554 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
16615be1 | 555 | set_buffer_escaped(bh); |
c312c4fd | 556 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
557 | } |
558 | ||
16615be1 SW |
559 | static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh, |
560 | struct list_head *list, struct list_head *done, | |
561 | unsigned int n) | |
b3b94faa | 562 | { |
16615be1 | 563 | struct buffer_head *bh1; |
18ec7d5c | 564 | struct gfs2_log_descriptor *ld; |
16615be1 SW |
565 | struct gfs2_bufdata *bd; |
566 | __be64 *ptr; | |
d7b616e2 | 567 | |
16615be1 SW |
568 | if (!bh) |
569 | return; | |
b3b94faa | 570 | |
16615be1 SW |
571 | ld = bh_log_desc(bh); |
572 | ld->ld_length = cpu_to_be32(n + 1); | |
573 | ld->ld_data1 = cpu_to_be32(n); | |
b3b94faa | 574 | |
16615be1 SW |
575 | ptr = bh_log_ptr(bh); |
576 | ||
577 | get_bh(bh); | |
721a9602 | 578 | submit_bh(WRITE_SYNC, bh); |
f55ab26a | 579 | gfs2_log_lock(sdp); |
16615be1 SW |
580 | while(!list_empty(list)) { |
581 | bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); | |
582 | list_move_tail(&bd->bd_le.le_list, done); | |
583 | get_bh(bd->bd_bh); | |
584 | while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) { | |
585 | gfs2_log_incr_head(sdp); | |
586 | ptr += 2; | |
18ec7d5c | 587 | } |
f55ab26a | 588 | gfs2_log_unlock(sdp); |
16615be1 SW |
589 | lock_buffer(bd->bd_bh); |
590 | if (buffer_escaped(bd->bd_bh)) { | |
591 | void *kaddr; | |
592 | bh1 = gfs2_log_get_buf(sdp); | |
593 | kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0); | |
594 | memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh), | |
595 | bh1->b_size); | |
596 | kunmap_atomic(kaddr, KM_USER0); | |
597 | *(__be32 *)bh1->b_data = 0; | |
598 | clear_buffer_escaped(bd->bd_bh); | |
599 | unlock_buffer(bd->bd_bh); | |
600 | brelse(bd->bd_bh); | |
601 | } else { | |
602 | bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh); | |
18ec7d5c | 603 | } |
721a9602 | 604 | submit_bh(WRITE_SYNC, bh1); |
f55ab26a | 605 | gfs2_log_lock(sdp); |
16615be1 SW |
606 | ptr += 2; |
607 | } | |
608 | gfs2_log_unlock(sdp); | |
609 | brelse(bh); | |
610 | } | |
611 | ||
612 | /** | |
613 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
614 | * | |
615 | */ | |
616 | ||
617 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) | |
618 | { | |
619 | struct gfs2_bufdata *bd = NULL; | |
620 | struct buffer_head *bh = NULL; | |
621 | unsigned int n = 0; | |
622 | __be64 *ptr = NULL, *end = NULL; | |
623 | LIST_HEAD(processed); | |
624 | LIST_HEAD(in_progress); | |
625 | ||
626 | gfs2_log_lock(sdp); | |
627 | while (!list_empty(&sdp->sd_log_le_databuf)) { | |
628 | if (ptr == end) { | |
f55ab26a | 629 | gfs2_log_unlock(sdp); |
16615be1 SW |
630 | gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); |
631 | n = 0; | |
632 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); | |
633 | ptr = bh_log_ptr(bh); | |
634 | end = bh_ptr_end(bh) - 1; | |
f55ab26a | 635 | gfs2_log_lock(sdp); |
16615be1 | 636 | continue; |
18ec7d5c | 637 | } |
16615be1 SW |
638 | bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); |
639 | list_move_tail(&bd->bd_le.le_list, &in_progress); | |
640 | gfs2_check_magic(bd->bd_bh); | |
641 | *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); | |
642 | *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0); | |
643 | n++; | |
b3b94faa | 644 | } |
f55ab26a | 645 | gfs2_log_unlock(sdp); |
16615be1 SW |
646 | gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); |
647 | gfs2_log_lock(sdp); | |
648 | list_splice(&processed, &sdp->sd_log_le_databuf); | |
649 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
650 | } |
651 | ||
652 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
653 | struct gfs2_log_descriptor *ld, | |
654 | __be64 *ptr, int pass) | |
655 | { | |
feaa7bba SW |
656 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
657 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 658 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
659 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
660 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
661 | u64 blkno; |
662 | u64 esc; | |
18ec7d5c SW |
663 | int error = 0; |
664 | ||
665 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
666 | return 0; | |
667 | ||
668 | gfs2_replay_incr_blk(sdp, &start); | |
669 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
670 | blkno = be64_to_cpu(*ptr++); | |
671 | esc = be64_to_cpu(*ptr++); | |
672 | ||
673 | sdp->sd_found_blocks++; | |
674 | ||
675 | if (gfs2_revoke_check(sdp, blkno, start)) | |
676 | continue; | |
677 | ||
678 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
679 | if (error) | |
680 | return error; | |
681 | ||
682 | bh_ip = gfs2_meta_new(gl, blkno); | |
683 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
684 | ||
685 | /* Unescape */ | |
686 | if (esc) { | |
687 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
688 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
689 | } | |
690 | mark_buffer_dirty(bh_ip); | |
691 | ||
692 | brelse(bh_log); | |
693 | brelse(bh_ip); | |
694 | if (error) | |
695 | break; | |
696 | ||
697 | sdp->sd_replayed_blocks++; | |
698 | } | |
699 | ||
700 | return error; | |
701 | } | |
702 | ||
703 | /* FIXME: sort out accounting for log blocks etc. */ | |
704 | ||
705 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
706 | { | |
feaa7bba SW |
707 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
708 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
709 | |
710 | if (error) { | |
7276b3b0 | 711 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
712 | return; |
713 | } | |
714 | if (pass != 1) | |
715 | return; | |
716 | ||
717 | /* data sync? */ | |
7276b3b0 | 718 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
719 | |
720 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
721 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
722 | } | |
723 | ||
724 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
725 | { | |
726 | struct list_head *head = &sdp->sd_log_le_databuf; | |
727 | struct gfs2_bufdata *bd; | |
728 | ||
729 | while (!list_empty(head)) { | |
730 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
b8e1aabf | 731 | list_del_init(&bd->bd_le.le_list); |
18ec7d5c | 732 | sdp->sd_log_num_databuf--; |
18ec7d5c | 733 | gfs2_unpin(sdp, bd->bd_bh, ai); |
18ec7d5c | 734 | } |
b3b94faa DT |
735 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
736 | } | |
737 | ||
18ec7d5c | 738 | |
b09e593d | 739 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa | 740 | .lo_add = buf_lo_add, |
b3b94faa DT |
741 | .lo_before_commit = buf_lo_before_commit, |
742 | .lo_after_commit = buf_lo_after_commit, | |
743 | .lo_before_scan = buf_lo_before_scan, | |
744 | .lo_scan_elements = buf_lo_scan_elements, | |
745 | .lo_after_scan = buf_lo_after_scan, | |
ea67eedb | 746 | .lo_name = "buf", |
b3b94faa DT |
747 | }; |
748 | ||
b09e593d | 749 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
750 | .lo_add = revoke_lo_add, |
751 | .lo_before_commit = revoke_lo_before_commit, | |
752 | .lo_before_scan = revoke_lo_before_scan, | |
753 | .lo_scan_elements = revoke_lo_scan_elements, | |
754 | .lo_after_scan = revoke_lo_after_scan, | |
ea67eedb | 755 | .lo_name = "revoke", |
b3b94faa DT |
756 | }; |
757 | ||
b09e593d | 758 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
759 | .lo_add = rg_lo_add, |
760 | .lo_after_commit = rg_lo_after_commit, | |
ea67eedb | 761 | .lo_name = "rg", |
b3b94faa DT |
762 | }; |
763 | ||
b09e593d | 764 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa DT |
765 | .lo_add = databuf_lo_add, |
766 | .lo_before_commit = databuf_lo_before_commit, | |
18ec7d5c SW |
767 | .lo_after_commit = databuf_lo_after_commit, |
768 | .lo_scan_elements = databuf_lo_scan_elements, | |
769 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 770 | .lo_name = "databuf", |
b3b94faa DT |
771 | }; |
772 | ||
b09e593d | 773 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
16615be1 | 774 | &gfs2_databuf_lops, |
b3b94faa | 775 | &gfs2_buf_lops, |
b3b94faa | 776 | &gfs2_rg_lops, |
16615be1 | 777 | &gfs2_revoke_lops, |
ea67eedb | 778 | NULL, |
b3b94faa DT |
779 | }; |
780 |