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