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