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