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