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> |
7d308590 | 16 | #include <linux/lm_interface.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
2332c443 | 20 | #include "inode.h" |
b3b94faa DT |
21 | #include "glock.h" |
22 | #include "log.h" | |
23 | #include "lops.h" | |
24 | #include "meta_io.h" | |
25 | #include "recovery.h" | |
26 | #include "rgrp.h" | |
27 | #include "trans.h" | |
5c676f6d | 28 | #include "util.h" |
b3b94faa | 29 | |
9b9107a5 SW |
30 | /** |
31 | * gfs2_pin - Pin a buffer in memory | |
32 | * @sdp: The superblock | |
33 | * @bh: The buffer to be pinned | |
34 | * | |
35 | * The log lock must be held when calling this function | |
36 | */ | |
37 | static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) | |
38 | { | |
39 | struct gfs2_bufdata *bd; | |
40 | ||
41 | gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); | |
42 | ||
43 | clear_buffer_dirty(bh); | |
44 | if (test_set_buffer_pinned(bh)) | |
45 | gfs2_assert_withdraw(sdp, 0); | |
46 | if (!buffer_uptodate(bh)) | |
47 | gfs2_io_error_bh(sdp, bh); | |
48 | bd = bh->b_private; | |
49 | /* If this buffer is in the AIL and it has already been written | |
50 | * to in-place disk block, remove it from the AIL. | |
51 | */ | |
52 | if (bd->bd_ail) | |
53 | list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); | |
54 | get_bh(bh); | |
55 | } | |
56 | ||
57 | /** | |
58 | * gfs2_unpin - Unpin a buffer | |
59 | * @sdp: the filesystem the buffer belongs to | |
60 | * @bh: The buffer to unpin | |
61 | * @ai: | |
62 | * | |
63 | */ | |
64 | ||
65 | static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, | |
66 | struct gfs2_ail *ai) | |
67 | { | |
68 | struct gfs2_bufdata *bd = bh->b_private; | |
69 | ||
70 | gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); | |
71 | ||
72 | if (!buffer_pinned(bh)) | |
73 | gfs2_assert_withdraw(sdp, 0); | |
74 | ||
75 | lock_buffer(bh); | |
76 | mark_buffer_dirty(bh); | |
77 | clear_buffer_pinned(bh); | |
78 | ||
79 | gfs2_log_lock(sdp); | |
80 | if (bd->bd_ail) { | |
81 | list_del(&bd->bd_ail_st_list); | |
82 | brelse(bh); | |
83 | } else { | |
84 | struct gfs2_glock *gl = bd->bd_gl; | |
85 | list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); | |
86 | atomic_inc(&gl->gl_ail_count); | |
87 | } | |
88 | bd->bd_ail = ai; | |
89 | list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); | |
2bcd610d | 90 | clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
9b9107a5 SW |
91 | gfs2_log_unlock(sdp); |
92 | unlock_buffer(bh); | |
93 | } | |
94 | ||
16615be1 SW |
95 | |
96 | static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh) | |
97 | { | |
98 | return (struct gfs2_log_descriptor *)bh->b_data; | |
99 | } | |
100 | ||
101 | static inline __be64 *bh_log_ptr(struct buffer_head *bh) | |
102 | { | |
103 | struct gfs2_log_descriptor *ld = bh_log_desc(bh); | |
104 | return (__force __be64 *)(ld + 1); | |
105 | } | |
106 | ||
107 | static inline __be64 *bh_ptr_end(struct buffer_head *bh) | |
108 | { | |
109 | return (__force __be64 *)(bh->b_data + bh->b_size); | |
110 | } | |
111 | ||
112 | ||
113 | static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) | |
114 | { | |
115 | struct buffer_head *bh = gfs2_log_get_buf(sdp); | |
116 | struct gfs2_log_descriptor *ld = bh_log_desc(bh); | |
117 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
118 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); | |
119 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
120 | ld->ld_type = cpu_to_be32(ld_type); | |
121 | ld->ld_length = 0; | |
122 | ld->ld_data1 = 0; | |
123 | ld->ld_data2 = 0; | |
124 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
125 | return bh; | |
126 | } | |
127 | ||
b3b94faa DT |
128 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
129 | { | |
130 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
131 | struct gfs2_trans *tr; | |
132 | ||
9b9107a5 | 133 | lock_buffer(bd->bd_bh); |
8bd95727 | 134 | gfs2_log_lock(sdp); |
9b9107a5 SW |
135 | if (!list_empty(&bd->bd_list_tr)) |
136 | goto out; | |
5c676f6d | 137 | tr = current->journal_info; |
b3b94faa DT |
138 | tr->tr_touched = 1; |
139 | tr->tr_num_buf++; | |
140 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
b3b94faa | 141 | if (!list_empty(&le->le_list)) |
9b9107a5 | 142 | goto out; |
2bcd610d SW |
143 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
144 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
b3b94faa | 145 | gfs2_meta_check(sdp, bd->bd_bh); |
a98ab220 | 146 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
147 | sdp->sd_log_num_buf++; |
148 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
b3b94faa | 149 | tr->tr_num_buf_new++; |
9b9107a5 SW |
150 | out: |
151 | gfs2_log_unlock(sdp); | |
152 | unlock_buffer(bd->bd_bh); | |
b3b94faa DT |
153 | } |
154 | ||
155 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
156 | { | |
157 | struct list_head *head = &tr->tr_list_buf; | |
158 | struct gfs2_bufdata *bd; | |
159 | ||
8bd95727 | 160 | gfs2_log_lock(sdp); |
b3b94faa DT |
161 | while (!list_empty(head)) { |
162 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
163 | list_del_init(&bd->bd_list_tr); | |
164 | tr->tr_num_buf--; | |
165 | } | |
8bd95727 | 166 | gfs2_log_unlock(sdp); |
b3b94faa DT |
167 | gfs2_assert_warn(sdp, !tr->tr_num_buf); |
168 | } | |
169 | ||
170 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
171 | { | |
172 | struct buffer_head *bh; | |
173 | struct gfs2_log_descriptor *ld; | |
174 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
905d2aef | 175 | unsigned int total; |
b3b94faa DT |
176 | unsigned int limit; |
177 | unsigned int num; | |
178 | unsigned n; | |
179 | __be64 *ptr; | |
180 | ||
2332c443 | 181 | limit = buf_limit(sdp); |
b3b94faa DT |
182 | /* for 4k blocks, limit = 503 */ |
183 | ||
905d2aef BP |
184 | gfs2_log_lock(sdp); |
185 | total = sdp->sd_log_num_buf; | |
b3b94faa DT |
186 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); |
187 | while(total) { | |
188 | num = total; | |
189 | if (total > limit) | |
190 | num = limit; | |
905d2aef | 191 | gfs2_log_unlock(sdp); |
16615be1 | 192 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); |
905d2aef | 193 | gfs2_log_lock(sdp); |
16615be1 SW |
194 | ld = bh_log_desc(bh); |
195 | ptr = bh_log_ptr(bh); | |
b3b94faa DT |
196 | ld->ld_length = cpu_to_be32(num + 1); |
197 | ld->ld_data1 = cpu_to_be32(num); | |
b3b94faa DT |
198 | |
199 | n = 0; | |
568f4c96 SW |
200 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
201 | bd_le.le_list) { | |
b3b94faa DT |
202 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
203 | if (++n >= num) | |
204 | break; | |
205 | } | |
206 | ||
905d2aef | 207 | gfs2_log_unlock(sdp); |
16615be1 | 208 | submit_bh(WRITE, bh); |
905d2aef | 209 | gfs2_log_lock(sdp); |
b3b94faa DT |
210 | |
211 | n = 0; | |
568f4c96 SW |
212 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
213 | bd_le.le_list) { | |
16615be1 | 214 | get_bh(bd2->bd_bh); |
905d2aef | 215 | gfs2_log_unlock(sdp); |
16615be1 | 216 | lock_buffer(bd2->bd_bh); |
b3b94faa | 217 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
16615be1 | 218 | submit_bh(WRITE, bh); |
905d2aef | 219 | gfs2_log_lock(sdp); |
b3b94faa DT |
220 | if (++n >= num) |
221 | break; | |
222 | } | |
223 | ||
905d2aef | 224 | BUG_ON(total < num); |
b3b94faa DT |
225 | total -= num; |
226 | } | |
905d2aef | 227 | gfs2_log_unlock(sdp); |
b3b94faa DT |
228 | } |
229 | ||
230 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
231 | { | |
232 | struct list_head *head = &sdp->sd_log_le_buf; | |
233 | struct gfs2_bufdata *bd; | |
234 | ||
235 | while (!list_empty(head)) { | |
236 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
237 | list_del_init(&bd->bd_le.le_list); | |
238 | sdp->sd_log_num_buf--; | |
239 | ||
a98ab220 | 240 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
241 | } |
242 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
243 | } | |
244 | ||
245 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 246 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 247 | { |
feaa7bba | 248 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
249 | |
250 | if (pass != 0) | |
251 | return; | |
252 | ||
253 | sdp->sd_found_blocks = 0; | |
254 | sdp->sd_replayed_blocks = 0; | |
255 | } | |
256 | ||
257 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
258 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
259 | int pass) | |
260 | { | |
feaa7bba SW |
261 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
262 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 263 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
264 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
265 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 266 | u64 blkno; |
b3b94faa DT |
267 | int error = 0; |
268 | ||
269 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
270 | return 0; | |
271 | ||
272 | gfs2_replay_incr_blk(sdp, &start); | |
273 | ||
274 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
275 | blkno = be64_to_cpu(*ptr++); | |
276 | ||
277 | sdp->sd_found_blocks++; | |
278 | ||
279 | if (gfs2_revoke_check(sdp, blkno, start)) | |
280 | continue; | |
281 | ||
282 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
283 | if (error) |
284 | return error; | |
b3b94faa DT |
285 | |
286 | bh_ip = gfs2_meta_new(gl, blkno); | |
287 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
288 | ||
289 | if (gfs2_meta_check(sdp, bh_ip)) | |
290 | error = -EIO; | |
291 | else | |
292 | mark_buffer_dirty(bh_ip); | |
293 | ||
294 | brelse(bh_log); | |
295 | brelse(bh_ip); | |
296 | ||
297 | if (error) | |
298 | break; | |
299 | ||
300 | sdp->sd_replayed_blocks++; | |
301 | } | |
302 | ||
303 | return error; | |
304 | } | |
305 | ||
306 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
307 | { | |
feaa7bba SW |
308 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
309 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
310 | |
311 | if (error) { | |
7276b3b0 | 312 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
313 | return; |
314 | } | |
315 | if (pass != 1) | |
316 | return; | |
317 | ||
7276b3b0 | 318 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
319 | |
320 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
321 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
322 | } | |
323 | ||
324 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
325 | { | |
326 | struct gfs2_trans *tr; | |
327 | ||
5c676f6d | 328 | tr = current->journal_info; |
b3b94faa DT |
329 | tr->tr_touched = 1; |
330 | tr->tr_num_revoke++; | |
b3b94faa DT |
331 | sdp->sd_log_num_revoke++; |
332 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
b3b94faa DT |
333 | } |
334 | ||
335 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
336 | { | |
337 | struct gfs2_log_descriptor *ld; | |
338 | struct gfs2_meta_header *mh; | |
339 | struct buffer_head *bh; | |
340 | unsigned int offset; | |
341 | struct list_head *head = &sdp->sd_log_le_revoke; | |
82e86087 | 342 | struct gfs2_bufdata *bd; |
b3b94faa DT |
343 | |
344 | if (!sdp->sd_log_num_revoke) | |
345 | return; | |
346 | ||
16615be1 SW |
347 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); |
348 | ld = bh_log_desc(bh); | |
568f4c96 | 349 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
cd915493 | 350 | sizeof(u64))); |
b3b94faa | 351 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
b3b94faa DT |
352 | offset = sizeof(struct gfs2_log_descriptor); |
353 | ||
354 | while (!list_empty(head)) { | |
82e86087 SW |
355 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); |
356 | list_del_init(&bd->bd_le.le_list); | |
b3b94faa DT |
357 | sdp->sd_log_num_revoke--; |
358 | ||
cd915493 | 359 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
16615be1 | 360 | submit_bh(WRITE, bh); |
b3b94faa DT |
361 | |
362 | bh = gfs2_log_get_buf(sdp); | |
363 | mh = (struct gfs2_meta_header *)bh->b_data; | |
364 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
365 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
366 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
367 | offset = sizeof(struct gfs2_meta_header); |
368 | } | |
369 | ||
82e86087 | 370 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno); |
0820ab51 | 371 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
b3b94faa | 372 | |
cd915493 | 373 | offset += sizeof(u64); |
b3b94faa DT |
374 | } |
375 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
376 | ||
16615be1 | 377 | submit_bh(WRITE, bh); |
b3b94faa DT |
378 | } |
379 | ||
380 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 381 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 382 | { |
feaa7bba | 383 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
384 | |
385 | if (pass != 0) | |
386 | return; | |
387 | ||
388 | sdp->sd_found_revokes = 0; | |
389 | sdp->sd_replay_tail = head->lh_tail; | |
390 | } | |
391 | ||
392 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
393 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
394 | int pass) | |
395 | { | |
feaa7bba | 396 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
397 | unsigned int blks = be32_to_cpu(ld->ld_length); |
398 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
399 | struct buffer_head *bh; | |
400 | unsigned int offset; | |
cd915493 | 401 | u64 blkno; |
b3b94faa DT |
402 | int first = 1; |
403 | int error; | |
404 | ||
405 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
406 | return 0; | |
407 | ||
408 | offset = sizeof(struct gfs2_log_descriptor); | |
409 | ||
410 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
411 | error = gfs2_replay_read_block(jd, start, &bh); | |
412 | if (error) | |
413 | return error; | |
414 | ||
415 | if (!first) | |
416 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
417 | ||
cd915493 | 418 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
419 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
420 | ||
421 | error = gfs2_revoke_add(sdp, blkno, start); | |
422 | if (error < 0) | |
423 | return error; | |
424 | else if (error) | |
425 | sdp->sd_found_revokes++; | |
426 | ||
427 | if (!--revokes) | |
428 | break; | |
cd915493 | 429 | offset += sizeof(u64); |
b3b94faa DT |
430 | } |
431 | ||
432 | brelse(bh); | |
433 | offset = sizeof(struct gfs2_meta_header); | |
434 | first = 0; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
441 | { | |
feaa7bba | 442 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
443 | |
444 | if (error) { | |
445 | gfs2_revoke_clean(sdp); | |
446 | return; | |
447 | } | |
448 | if (pass != 1) | |
449 | return; | |
450 | ||
451 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
452 | jd->jd_jid, sdp->sd_found_revokes); | |
453 | ||
454 | gfs2_revoke_clean(sdp); | |
455 | } | |
456 | ||
457 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
458 | { | |
459 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 460 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 461 | |
5c676f6d | 462 | tr->tr_touched = 1; |
b3b94faa | 463 | |
b3b94faa | 464 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); |
b3b94faa DT |
465 | |
466 | gfs2_log_lock(sdp); | |
68835625 BM |
467 | if (!list_empty(&le->le_list)){ |
468 | gfs2_log_unlock(sdp); | |
469 | return; | |
470 | } | |
471 | gfs2_rgrp_bh_hold(rgd); | |
b3b94faa DT |
472 | sdp->sd_log_num_rg++; |
473 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
907b9bce | 474 | gfs2_log_unlock(sdp); |
b3b94faa DT |
475 | } |
476 | ||
477 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
478 | { | |
479 | struct list_head *head = &sdp->sd_log_le_rg; | |
480 | struct gfs2_rgrpd *rgd; | |
481 | ||
482 | while (!list_empty(head)) { | |
483 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
484 | list_del_init(&rgd->rd_le.le_list); | |
485 | sdp->sd_log_num_rg--; | |
486 | ||
487 | gfs2_rgrp_repolish_clones(rgd); | |
488 | gfs2_rgrp_bh_put(rgd); | |
489 | } | |
490 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
491 | } | |
492 | ||
18ec7d5c SW |
493 | /** |
494 | * databuf_lo_add - Add a databuf to the transaction. | |
495 | * | |
496 | * This is used in two distinct cases: | |
497 | * i) In ordered write mode | |
498 | * We put the data buffer on a list so that we can ensure that its | |
499 | * synced to disk at the right time | |
500 | * ii) In journaled data mode | |
501 | * We need to journal the data block in the same way as metadata in | |
502 | * the functions above. The difference is that here we have a tag | |
503 | * which is two __be64's being the block number (as per meta data) | |
504 | * and a flag which says whether the data block needs escaping or | |
505 | * not. This means we need a new log entry for each 251 or so data | |
506 | * blocks, which isn't an enormous overhead but twice as much as | |
507 | * for normal metadata blocks. | |
508 | */ | |
b3b94faa DT |
509 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
510 | { | |
18ec7d5c | 511 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 512 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 513 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 514 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 515 | |
9b9107a5 | 516 | lock_buffer(bd->bd_bh); |
8bd95727 | 517 | gfs2_log_lock(sdp); |
9ff8ec32 SW |
518 | if (tr) { |
519 | if (!list_empty(&bd->bd_list_tr)) | |
520 | goto out; | |
521 | tr->tr_touched = 1; | |
522 | if (gfs2_is_jdata(ip)) { | |
523 | tr->tr_num_buf++; | |
524 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
525 | } | |
773ed1a0 | 526 | } |
2332c443 | 527 | if (!list_empty(&le->le_list)) |
9b9107a5 | 528 | goto out; |
2332c443 | 529 | |
2bcd610d SW |
530 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
531 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
2332c443 | 532 | if (gfs2_is_jdata(ip)) { |
2332c443 RP |
533 | gfs2_pin(sdp, bd->bd_bh); |
534 | tr->tr_num_databuf_new++; | |
d7b616e2 SW |
535 | sdp->sd_log_num_databuf++; |
536 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
537 | } else { | |
538 | list_add(&le->le_list, &sdp->sd_log_le_ordered); | |
9b9107a5 | 539 | } |
9b9107a5 | 540 | out: |
b3b94faa | 541 | gfs2_log_unlock(sdp); |
9b9107a5 | 542 | unlock_buffer(bd->bd_bh); |
b3b94faa DT |
543 | } |
544 | ||
16615be1 | 545 | static void gfs2_check_magic(struct buffer_head *bh) |
18ec7d5c | 546 | { |
18ec7d5c SW |
547 | void *kaddr; |
548 | __be32 *ptr; | |
18ec7d5c | 549 | |
16615be1 SW |
550 | clear_buffer_escaped(bh); |
551 | kaddr = kmap_atomic(bh->b_page, KM_USER0); | |
18ec7d5c SW |
552 | ptr = kaddr + bh_offset(bh); |
553 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
16615be1 | 554 | set_buffer_escaped(bh); |
c312c4fd | 555 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
556 | } |
557 | ||
16615be1 SW |
558 | static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh, |
559 | struct list_head *list, struct list_head *done, | |
560 | unsigned int n) | |
b3b94faa | 561 | { |
16615be1 | 562 | struct buffer_head *bh1; |
18ec7d5c | 563 | struct gfs2_log_descriptor *ld; |
16615be1 SW |
564 | struct gfs2_bufdata *bd; |
565 | __be64 *ptr; | |
d7b616e2 | 566 | |
16615be1 SW |
567 | if (!bh) |
568 | return; | |
b3b94faa | 569 | |
16615be1 SW |
570 | ld = bh_log_desc(bh); |
571 | ld->ld_length = cpu_to_be32(n + 1); | |
572 | ld->ld_data1 = cpu_to_be32(n); | |
b3b94faa | 573 | |
16615be1 SW |
574 | ptr = bh_log_ptr(bh); |
575 | ||
576 | get_bh(bh); | |
577 | submit_bh(WRITE, bh); | |
f55ab26a | 578 | gfs2_log_lock(sdp); |
16615be1 SW |
579 | while(!list_empty(list)) { |
580 | bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); | |
581 | list_move_tail(&bd->bd_le.le_list, done); | |
582 | get_bh(bd->bd_bh); | |
583 | while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) { | |
584 | gfs2_log_incr_head(sdp); | |
585 | ptr += 2; | |
18ec7d5c | 586 | } |
f55ab26a | 587 | gfs2_log_unlock(sdp); |
16615be1 SW |
588 | lock_buffer(bd->bd_bh); |
589 | if (buffer_escaped(bd->bd_bh)) { | |
590 | void *kaddr; | |
591 | bh1 = gfs2_log_get_buf(sdp); | |
592 | kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0); | |
593 | memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh), | |
594 | bh1->b_size); | |
595 | kunmap_atomic(kaddr, KM_USER0); | |
596 | *(__be32 *)bh1->b_data = 0; | |
597 | clear_buffer_escaped(bd->bd_bh); | |
598 | unlock_buffer(bd->bd_bh); | |
599 | brelse(bd->bd_bh); | |
600 | } else { | |
601 | bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh); | |
18ec7d5c | 602 | } |
16615be1 | 603 | submit_bh(WRITE, bh1); |
f55ab26a | 604 | gfs2_log_lock(sdp); |
16615be1 SW |
605 | ptr += 2; |
606 | } | |
607 | gfs2_log_unlock(sdp); | |
608 | brelse(bh); | |
609 | } | |
610 | ||
611 | /** | |
612 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
613 | * | |
614 | */ | |
615 | ||
616 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) | |
617 | { | |
618 | struct gfs2_bufdata *bd = NULL; | |
619 | struct buffer_head *bh = NULL; | |
620 | unsigned int n = 0; | |
621 | __be64 *ptr = NULL, *end = NULL; | |
622 | LIST_HEAD(processed); | |
623 | LIST_HEAD(in_progress); | |
624 | ||
625 | gfs2_log_lock(sdp); | |
626 | while (!list_empty(&sdp->sd_log_le_databuf)) { | |
627 | if (ptr == end) { | |
f55ab26a | 628 | gfs2_log_unlock(sdp); |
16615be1 SW |
629 | gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); |
630 | n = 0; | |
631 | bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); | |
632 | ptr = bh_log_ptr(bh); | |
633 | end = bh_ptr_end(bh) - 1; | |
f55ab26a | 634 | gfs2_log_lock(sdp); |
16615be1 | 635 | continue; |
18ec7d5c | 636 | } |
16615be1 SW |
637 | bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); |
638 | list_move_tail(&bd->bd_le.le_list, &in_progress); | |
639 | gfs2_check_magic(bd->bd_bh); | |
640 | *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); | |
641 | *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0); | |
642 | n++; | |
b3b94faa | 643 | } |
f55ab26a | 644 | gfs2_log_unlock(sdp); |
16615be1 SW |
645 | gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); |
646 | gfs2_log_lock(sdp); | |
647 | list_splice(&processed, &sdp->sd_log_le_databuf); | |
648 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
649 | } |
650 | ||
651 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
652 | struct gfs2_log_descriptor *ld, | |
653 | __be64 *ptr, int pass) | |
654 | { | |
feaa7bba SW |
655 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
656 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 657 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
658 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
659 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
660 | u64 blkno; |
661 | u64 esc; | |
18ec7d5c SW |
662 | int error = 0; |
663 | ||
664 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
665 | return 0; | |
666 | ||
667 | gfs2_replay_incr_blk(sdp, &start); | |
668 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
669 | blkno = be64_to_cpu(*ptr++); | |
670 | esc = be64_to_cpu(*ptr++); | |
671 | ||
672 | sdp->sd_found_blocks++; | |
673 | ||
674 | if (gfs2_revoke_check(sdp, blkno, start)) | |
675 | continue; | |
676 | ||
677 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
678 | if (error) | |
679 | return error; | |
680 | ||
681 | bh_ip = gfs2_meta_new(gl, blkno); | |
682 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
683 | ||
684 | /* Unescape */ | |
685 | if (esc) { | |
686 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
687 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
688 | } | |
689 | mark_buffer_dirty(bh_ip); | |
690 | ||
691 | brelse(bh_log); | |
692 | brelse(bh_ip); | |
693 | if (error) | |
694 | break; | |
695 | ||
696 | sdp->sd_replayed_blocks++; | |
697 | } | |
698 | ||
699 | return error; | |
700 | } | |
701 | ||
702 | /* FIXME: sort out accounting for log blocks etc. */ | |
703 | ||
704 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
705 | { | |
feaa7bba SW |
706 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
707 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
708 | |
709 | if (error) { | |
7276b3b0 | 710 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
711 | return; |
712 | } | |
713 | if (pass != 1) | |
714 | return; | |
715 | ||
716 | /* data sync? */ | |
7276b3b0 | 717 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
718 | |
719 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
720 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
721 | } | |
722 | ||
723 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
724 | { | |
725 | struct list_head *head = &sdp->sd_log_le_databuf; | |
726 | struct gfs2_bufdata *bd; | |
727 | ||
728 | while (!list_empty(head)) { | |
729 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
b8e1aabf | 730 | list_del_init(&bd->bd_le.le_list); |
18ec7d5c | 731 | sdp->sd_log_num_databuf--; |
18ec7d5c | 732 | gfs2_unpin(sdp, bd->bd_bh, ai); |
18ec7d5c | 733 | } |
b3b94faa DT |
734 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
735 | } | |
736 | ||
18ec7d5c | 737 | |
b09e593d | 738 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
739 | .lo_add = buf_lo_add, |
740 | .lo_incore_commit = buf_lo_incore_commit, | |
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 | 765 | .lo_add = databuf_lo_add, |
18ec7d5c | 766 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 767 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
768 | .lo_after_commit = databuf_lo_after_commit, |
769 | .lo_scan_elements = databuf_lo_scan_elements, | |
770 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 771 | .lo_name = "databuf", |
b3b94faa DT |
772 | }; |
773 | ||
b09e593d | 774 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
16615be1 | 775 | &gfs2_databuf_lops, |
b3b94faa | 776 | &gfs2_buf_lops, |
b3b94faa | 777 | &gfs2_rg_lops, |
16615be1 | 778 | &gfs2_revoke_lops, |
ea67eedb | 779 | NULL, |
b3b94faa DT |
780 | }; |
781 |