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> |
7d308590 | 16 | #include <linux/lm_interface.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
20 | #include "glock.h" |
21 | #include "log.h" | |
22 | #include "lops.h" | |
23 | #include "meta_io.h" | |
24 | #include "recovery.h" | |
25 | #include "rgrp.h" | |
26 | #include "trans.h" | |
5c676f6d | 27 | #include "util.h" |
b3b94faa DT |
28 | |
29 | static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
30 | { | |
31 | struct gfs2_glock *gl; | |
5c676f6d | 32 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 33 | |
5c676f6d | 34 | tr->tr_touched = 1; |
b3b94faa DT |
35 | |
36 | if (!list_empty(&le->le_list)) | |
37 | return; | |
38 | ||
39 | gl = container_of(le, struct gfs2_glock, gl_le); | |
40 | if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) | |
41 | return; | |
42 | gfs2_glock_hold(gl); | |
43 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
44 | ||
45 | gfs2_log_lock(sdp); | |
46 | sdp->sd_log_num_gl++; | |
47 | list_add(&le->le_list, &sdp->sd_log_le_gl); | |
48 | gfs2_log_unlock(sdp); | |
49 | } | |
50 | ||
51 | static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
52 | { | |
53 | struct list_head *head = &sdp->sd_log_le_gl; | |
54 | struct gfs2_glock *gl; | |
55 | ||
56 | while (!list_empty(head)) { | |
57 | gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); | |
58 | list_del_init(&gl->gl_le.le_list); | |
59 | sdp->sd_log_num_gl--; | |
60 | ||
61 | gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); | |
62 | gfs2_glock_put(gl); | |
63 | } | |
64 | gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); | |
65 | } | |
66 | ||
67 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
68 | { | |
69 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
70 | struct gfs2_trans *tr; | |
71 | ||
8bd95727 SW |
72 | gfs2_log_lock(sdp); |
73 | if (!list_empty(&bd->bd_list_tr)) { | |
74 | gfs2_log_unlock(sdp); | |
b3b94faa | 75 | return; |
8bd95727 | 76 | } |
5c676f6d | 77 | tr = current->journal_info; |
b3b94faa DT |
78 | tr->tr_touched = 1; |
79 | tr->tr_num_buf++; | |
80 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
8bd95727 | 81 | gfs2_log_unlock(sdp); |
b3b94faa DT |
82 | |
83 | if (!list_empty(&le->le_list)) | |
84 | return; | |
85 | ||
86 | gfs2_trans_add_gl(bd->bd_gl); | |
87 | ||
88 | gfs2_meta_check(sdp, bd->bd_bh); | |
a98ab220 | 89 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
90 | gfs2_log_lock(sdp); |
91 | sdp->sd_log_num_buf++; | |
92 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
93 | gfs2_log_unlock(sdp); | |
94 | ||
95 | tr->tr_num_buf_new++; | |
96 | } | |
97 | ||
98 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
99 | { | |
100 | struct list_head *head = &tr->tr_list_buf; | |
101 | struct gfs2_bufdata *bd; | |
102 | ||
8bd95727 | 103 | gfs2_log_lock(sdp); |
b3b94faa DT |
104 | while (!list_empty(head)) { |
105 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
106 | list_del_init(&bd->bd_list_tr); | |
107 | tr->tr_num_buf--; | |
108 | } | |
8bd95727 | 109 | gfs2_log_unlock(sdp); |
b3b94faa DT |
110 | gfs2_assert_warn(sdp, !tr->tr_num_buf); |
111 | } | |
112 | ||
113 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
114 | { | |
115 | struct buffer_head *bh; | |
116 | struct gfs2_log_descriptor *ld; | |
117 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
118 | unsigned int total = sdp->sd_log_num_buf; | |
119 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
120 | unsigned int limit; | |
121 | unsigned int num; | |
122 | unsigned n; | |
123 | __be64 *ptr; | |
124 | ||
82ffa516 | 125 | offset += sizeof(__be64) - 1; |
b3b94faa DT |
126 | offset &= ~(sizeof(__be64) - 1); |
127 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
128 | /* for 4k blocks, limit = 503 */ | |
129 | ||
130 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); | |
131 | while(total) { | |
132 | num = total; | |
133 | if (total > limit) | |
134 | num = limit; | |
135 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 136 | sdp->sd_log_num_hdrs++; |
b3b94faa DT |
137 | ld = (struct gfs2_log_descriptor *)bh->b_data; |
138 | ptr = (__be64 *)(bh->b_data + offset); | |
139 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
140 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
141 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa DT |
142 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
143 | ld->ld_length = cpu_to_be32(num + 1); | |
144 | ld->ld_data1 = cpu_to_be32(num); | |
145 | ld->ld_data2 = cpu_to_be32(0); | |
146 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
147 | ||
148 | n = 0; | |
568f4c96 SW |
149 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
150 | bd_le.le_list) { | |
b3b94faa DT |
151 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
152 | if (++n >= num) | |
153 | break; | |
154 | } | |
155 | ||
156 | set_buffer_dirty(bh); | |
157 | ll_rw_block(WRITE, 1, &bh); | |
158 | ||
159 | n = 0; | |
568f4c96 SW |
160 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
161 | bd_le.le_list) { | |
b3b94faa DT |
162 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
163 | set_buffer_dirty(bh); | |
164 | ll_rw_block(WRITE, 1, &bh); | |
165 | if (++n >= num) | |
166 | break; | |
167 | } | |
168 | ||
169 | total -= num; | |
170 | } | |
171 | } | |
172 | ||
173 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
174 | { | |
175 | struct list_head *head = &sdp->sd_log_le_buf; | |
176 | struct gfs2_bufdata *bd; | |
177 | ||
178 | while (!list_empty(head)) { | |
179 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
180 | list_del_init(&bd->bd_le.le_list); | |
181 | sdp->sd_log_num_buf--; | |
182 | ||
a98ab220 | 183 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
184 | } |
185 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
186 | } | |
187 | ||
188 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 189 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 190 | { |
feaa7bba | 191 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
192 | |
193 | if (pass != 0) | |
194 | return; | |
195 | ||
196 | sdp->sd_found_blocks = 0; | |
197 | sdp->sd_replayed_blocks = 0; | |
198 | } | |
199 | ||
200 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
201 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
202 | int pass) | |
203 | { | |
feaa7bba SW |
204 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
205 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 206 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
207 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
208 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 209 | u64 blkno; |
b3b94faa DT |
210 | int error = 0; |
211 | ||
212 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
213 | return 0; | |
214 | ||
215 | gfs2_replay_incr_blk(sdp, &start); | |
216 | ||
217 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
218 | blkno = be64_to_cpu(*ptr++); | |
219 | ||
220 | sdp->sd_found_blocks++; | |
221 | ||
222 | if (gfs2_revoke_check(sdp, blkno, start)) | |
223 | continue; | |
224 | ||
225 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
226 | if (error) |
227 | return error; | |
b3b94faa DT |
228 | |
229 | bh_ip = gfs2_meta_new(gl, blkno); | |
230 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
231 | ||
232 | if (gfs2_meta_check(sdp, bh_ip)) | |
233 | error = -EIO; | |
234 | else | |
235 | mark_buffer_dirty(bh_ip); | |
236 | ||
237 | brelse(bh_log); | |
238 | brelse(bh_ip); | |
239 | ||
240 | if (error) | |
241 | break; | |
242 | ||
243 | sdp->sd_replayed_blocks++; | |
244 | } | |
245 | ||
246 | return error; | |
247 | } | |
248 | ||
249 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
250 | { | |
feaa7bba SW |
251 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
252 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
253 | |
254 | if (error) { | |
7276b3b0 | 255 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
256 | return; |
257 | } | |
258 | if (pass != 1) | |
259 | return; | |
260 | ||
7276b3b0 | 261 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
262 | |
263 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
264 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
265 | } | |
266 | ||
267 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
268 | { | |
269 | struct gfs2_trans *tr; | |
270 | ||
5c676f6d | 271 | tr = current->journal_info; |
b3b94faa DT |
272 | tr->tr_touched = 1; |
273 | tr->tr_num_revoke++; | |
274 | ||
275 | gfs2_log_lock(sdp); | |
276 | sdp->sd_log_num_revoke++; | |
277 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
278 | gfs2_log_unlock(sdp); | |
279 | } | |
280 | ||
281 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
282 | { | |
283 | struct gfs2_log_descriptor *ld; | |
284 | struct gfs2_meta_header *mh; | |
285 | struct buffer_head *bh; | |
286 | unsigned int offset; | |
287 | struct list_head *head = &sdp->sd_log_le_revoke; | |
288 | struct gfs2_revoke *rv; | |
289 | ||
290 | if (!sdp->sd_log_num_revoke) | |
291 | return; | |
292 | ||
293 | bh = gfs2_log_get_buf(sdp); | |
294 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
295 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
296 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
297 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa | 298 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); |
568f4c96 | 299 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
cd915493 | 300 | sizeof(u64))); |
b3b94faa DT |
301 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
302 | ld->ld_data2 = cpu_to_be32(0); | |
303 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
304 | offset = sizeof(struct gfs2_log_descriptor); | |
305 | ||
306 | while (!list_empty(head)) { | |
307 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 308 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
309 | sdp->sd_log_num_revoke--; |
310 | ||
cd915493 | 311 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
312 | set_buffer_dirty(bh); |
313 | ll_rw_block(WRITE, 1, &bh); | |
314 | ||
315 | bh = gfs2_log_get_buf(sdp); | |
316 | mh = (struct gfs2_meta_header *)bh->b_data; | |
317 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
318 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
319 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
320 | offset = sizeof(struct gfs2_meta_header); |
321 | } | |
322 | ||
323 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
324 | kfree(rv); | |
325 | ||
cd915493 | 326 | offset += sizeof(u64); |
b3b94faa DT |
327 | } |
328 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
329 | ||
330 | set_buffer_dirty(bh); | |
331 | ll_rw_block(WRITE, 1, &bh); | |
332 | } | |
333 | ||
334 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 335 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 336 | { |
feaa7bba | 337 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
338 | |
339 | if (pass != 0) | |
340 | return; | |
341 | ||
342 | sdp->sd_found_revokes = 0; | |
343 | sdp->sd_replay_tail = head->lh_tail; | |
344 | } | |
345 | ||
346 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
347 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
348 | int pass) | |
349 | { | |
feaa7bba | 350 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
351 | unsigned int blks = be32_to_cpu(ld->ld_length); |
352 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
353 | struct buffer_head *bh; | |
354 | unsigned int offset; | |
cd915493 | 355 | u64 blkno; |
b3b94faa DT |
356 | int first = 1; |
357 | int error; | |
358 | ||
359 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
360 | return 0; | |
361 | ||
362 | offset = sizeof(struct gfs2_log_descriptor); | |
363 | ||
364 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
365 | error = gfs2_replay_read_block(jd, start, &bh); | |
366 | if (error) | |
367 | return error; | |
368 | ||
369 | if (!first) | |
370 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
371 | ||
cd915493 | 372 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
373 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
374 | ||
375 | error = gfs2_revoke_add(sdp, blkno, start); | |
376 | if (error < 0) | |
377 | return error; | |
378 | else if (error) | |
379 | sdp->sd_found_revokes++; | |
380 | ||
381 | if (!--revokes) | |
382 | break; | |
cd915493 | 383 | offset += sizeof(u64); |
b3b94faa DT |
384 | } |
385 | ||
386 | brelse(bh); | |
387 | offset = sizeof(struct gfs2_meta_header); | |
388 | first = 0; | |
389 | } | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
395 | { | |
feaa7bba | 396 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
397 | |
398 | if (error) { | |
399 | gfs2_revoke_clean(sdp); | |
400 | return; | |
401 | } | |
402 | if (pass != 1) | |
403 | return; | |
404 | ||
405 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
406 | jd->jd_jid, sdp->sd_found_revokes); | |
407 | ||
408 | gfs2_revoke_clean(sdp); | |
409 | } | |
410 | ||
411 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
412 | { | |
413 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 414 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 415 | |
5c676f6d | 416 | tr->tr_touched = 1; |
b3b94faa DT |
417 | |
418 | if (!list_empty(&le->le_list)) | |
419 | return; | |
420 | ||
421 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); | |
422 | gfs2_rgrp_bh_hold(rgd); | |
423 | ||
424 | gfs2_log_lock(sdp); | |
425 | sdp->sd_log_num_rg++; | |
426 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
907b9bce | 427 | gfs2_log_unlock(sdp); |
b3b94faa DT |
428 | } |
429 | ||
430 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
431 | { | |
432 | struct list_head *head = &sdp->sd_log_le_rg; | |
433 | struct gfs2_rgrpd *rgd; | |
434 | ||
435 | while (!list_empty(head)) { | |
436 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
437 | list_del_init(&rgd->rd_le.le_list); | |
438 | sdp->sd_log_num_rg--; | |
439 | ||
440 | gfs2_rgrp_repolish_clones(rgd); | |
441 | gfs2_rgrp_bh_put(rgd); | |
442 | } | |
443 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
444 | } | |
445 | ||
18ec7d5c SW |
446 | /** |
447 | * databuf_lo_add - Add a databuf to the transaction. | |
448 | * | |
449 | * This is used in two distinct cases: | |
450 | * i) In ordered write mode | |
451 | * We put the data buffer on a list so that we can ensure that its | |
452 | * synced to disk at the right time | |
453 | * ii) In journaled data mode | |
454 | * We need to journal the data block in the same way as metadata in | |
455 | * the functions above. The difference is that here we have a tag | |
456 | * which is two __be64's being the block number (as per meta data) | |
457 | * and a flag which says whether the data block needs escaping or | |
458 | * not. This means we need a new log entry for each 251 or so data | |
459 | * blocks, which isn't an enormous overhead but twice as much as | |
460 | * for normal metadata blocks. | |
461 | */ | |
b3b94faa DT |
462 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
463 | { | |
18ec7d5c | 464 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 465 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 466 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 467 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 468 | |
8bd95727 | 469 | gfs2_log_lock(sdp); |
18ec7d5c | 470 | tr->tr_touched = 1; |
15d00c0b | 471 | if (list_empty(&bd->bd_list_tr) && |
18ec7d5c SW |
472 | (ip->i_di.di_flags & GFS2_DIF_JDATA)) { |
473 | tr->tr_num_buf++; | |
18ec7d5c | 474 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); |
8bd95727 | 475 | gfs2_log_unlock(sdp); |
18ec7d5c | 476 | gfs2_pin(sdp, bd->bd_bh); |
b4dc7291 | 477 | tr->tr_num_buf_new++; |
8bd95727 SW |
478 | } else { |
479 | gfs2_log_unlock(sdp); | |
18ec7d5c | 480 | } |
b61dde79 | 481 | gfs2_trans_add_gl(bd->bd_gl); |
b3b94faa | 482 | gfs2_log_lock(sdp); |
15d00c0b | 483 | if (list_empty(&le->le_list)) { |
13538b8e SW |
484 | if (ip->i_di.di_flags & GFS2_DIF_JDATA) |
485 | sdp->sd_log_num_jdata++; | |
486 | sdp->sd_log_num_databuf++; | |
487 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
488 | } | |
b3b94faa DT |
489 | gfs2_log_unlock(sdp); |
490 | } | |
491 | ||
18ec7d5c SW |
492 | static int gfs2_check_magic(struct buffer_head *bh) |
493 | { | |
494 | struct page *page = bh->b_page; | |
495 | void *kaddr; | |
496 | __be32 *ptr; | |
497 | int rv = 0; | |
498 | ||
499 | kaddr = kmap_atomic(page, KM_USER0); | |
500 | ptr = kaddr + bh_offset(bh); | |
501 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
502 | rv = 1; | |
c312c4fd | 503 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
504 | |
505 | return rv; | |
506 | } | |
507 | ||
508 | /** | |
509 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
510 | * | |
511 | * Here we scan through the lists of buffers and make the assumption | |
512 | * that any buffer thats been pinned is being journaled, and that | |
513 | * any unpinned buffer is an ordered write data buffer and therefore | |
514 | * will be written back rather than journaled. | |
515 | */ | |
b3b94faa DT |
516 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
517 | { | |
b3b94faa | 518 | LIST_HEAD(started); |
18ec7d5c | 519 | struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
70209331 | 520 | struct buffer_head *bh = NULL,*bh1 = NULL; |
18ec7d5c SW |
521 | unsigned int offset = sizeof(struct gfs2_log_descriptor); |
522 | struct gfs2_log_descriptor *ld; | |
523 | unsigned int limit; | |
524 | unsigned int total_dbuf = sdp->sd_log_num_databuf; | |
525 | unsigned int total_jdata = sdp->sd_log_num_jdata; | |
526 | unsigned int num, n; | |
f55ab26a | 527 | __be64 *ptr = NULL; |
b3b94faa | 528 | |
a67cdbd4 | 529 | offset += 2*sizeof(__be64) - 1; |
18ec7d5c SW |
530 | offset &= ~(2*sizeof(__be64) - 1); |
531 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
b3b94faa | 532 | |
18ec7d5c SW |
533 | /* |
534 | * Start writing ordered buffers, write journaled buffers | |
535 | * into the log along with a header | |
536 | */ | |
f55ab26a | 537 | gfs2_log_lock(sdp); |
568f4c96 SW |
538 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, |
539 | bd_le.le_list); | |
18ec7d5c SW |
540 | while(total_dbuf) { |
541 | num = total_jdata; | |
542 | if (num > limit) | |
543 | num = limit; | |
544 | n = 0; | |
568f4c96 SW |
545 | list_for_each_entry_safe_continue(bd1, bdt, |
546 | &sdp->sd_log_le_databuf, | |
547 | bd_le.le_list) { | |
70209331 RC |
548 | /* store off the buffer head in a local ptr since |
549 | * gfs2_bufdata might change when we drop the log lock | |
550 | */ | |
551 | bh1 = bd1->bd_bh; | |
552 | ||
18ec7d5c | 553 | /* An ordered write buffer */ |
70209331 | 554 | if (bh1 && !buffer_pinned(bh1)) { |
18ec7d5c SW |
555 | list_move(&bd1->bd_le.le_list, &started); |
556 | if (bd1 == bd2) { | |
557 | bd2 = NULL; | |
568f4c96 SW |
558 | bd2 = list_prepare_entry(bd2, |
559 | &sdp->sd_log_le_databuf, | |
560 | bd_le.le_list); | |
18ec7d5c SW |
561 | } |
562 | total_dbuf--; | |
70209331 RC |
563 | if (bh1) { |
564 | if (buffer_dirty(bh1)) { | |
565 | get_bh(bh1); | |
566 | ||
f55ab26a | 567 | gfs2_log_unlock(sdp); |
70209331 RC |
568 | |
569 | ll_rw_block(SWRITE, 1, &bh1); | |
570 | brelse(bh1); | |
571 | ||
f55ab26a | 572 | gfs2_log_lock(sdp); |
18ec7d5c | 573 | } |
18ec7d5c SW |
574 | continue; |
575 | } | |
18ec7d5c | 576 | continue; |
70209331 | 577 | } else if (bh1) { /* A journaled buffer */ |
18ec7d5c SW |
578 | int magic; |
579 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
580 | if (!bh) { |
581 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 582 | sdp->sd_log_num_hdrs++; |
568f4c96 SW |
583 | ld = (struct gfs2_log_descriptor *) |
584 | bh->b_data; | |
18ec7d5c | 585 | ptr = (__be64 *)(bh->b_data + offset); |
568f4c96 SW |
586 | ld->ld_header.mh_magic = |
587 | cpu_to_be32(GFS2_MAGIC); | |
588 | ld->ld_header.mh_type = | |
e3167ded | 589 | cpu_to_be32(GFS2_METATYPE_LD); |
568f4c96 | 590 | ld->ld_header.mh_format = |
e3167ded | 591 | cpu_to_be32(GFS2_FORMAT_LD); |
568f4c96 SW |
592 | ld->ld_type = |
593 | cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
18ec7d5c SW |
594 | ld->ld_length = cpu_to_be32(num + 1); |
595 | ld->ld_data1 = cpu_to_be32(num); | |
596 | ld->ld_data2 = cpu_to_be32(0); | |
597 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
598 | } | |
70209331 RC |
599 | magic = gfs2_check_magic(bh1); |
600 | *ptr++ = cpu_to_be64(bh1->b_blocknr); | |
18ec7d5c | 601 | *ptr++ = cpu_to_be64((__u64)magic); |
70209331 | 602 | clear_buffer_escaped(bh1); |
18ec7d5c | 603 | if (unlikely(magic != 0)) |
70209331 | 604 | set_buffer_escaped(bh1); |
f55ab26a | 605 | gfs2_log_lock(sdp); |
18ec7d5c SW |
606 | if (n++ > num) |
607 | break; | |
70209331 | 608 | } else if (!bh1) { |
623d9355 SW |
609 | total_dbuf--; |
610 | sdp->sd_log_num_databuf--; | |
611 | list_del_init(&bd1->bd_le.le_list); | |
612 | if (bd1 == bd2) { | |
613 | bd2 = NULL; | |
614 | bd2 = list_prepare_entry(bd2, | |
615 | &sdp->sd_log_le_databuf, | |
616 | bd_le.le_list); | |
617 | } | |
618 | kmem_cache_free(gfs2_bufdata_cachep, bd1); | |
18ec7d5c SW |
619 | } |
620 | } | |
f55ab26a | 621 | gfs2_log_unlock(sdp); |
b3b94faa | 622 | if (bh) { |
18ec7d5c SW |
623 | set_buffer_dirty(bh); |
624 | ll_rw_block(WRITE, 1, &bh); | |
625 | bh = NULL; | |
626 | } | |
627 | n = 0; | |
f55ab26a | 628 | gfs2_log_lock(sdp); |
568f4c96 SW |
629 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, |
630 | bd_le.le_list) { | |
18ec7d5c SW |
631 | if (!bd2->bd_bh) |
632 | continue; | |
633 | /* copy buffer if it needs escaping */ | |
f55ab26a | 634 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
635 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
636 | void *kaddr; | |
637 | struct page *page = bd2->bd_bh->b_page; | |
638 | bh = gfs2_log_get_buf(sdp); | |
639 | kaddr = kmap_atomic(page, KM_USER0); | |
568f4c96 SW |
640 | memcpy(bh->b_data, |
641 | kaddr + bh_offset(bd2->bd_bh), | |
642 | sdp->sd_sb.sb_bsize); | |
c312c4fd | 643 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
644 | *(__be32 *)bh->b_data = 0; |
645 | } else { | |
646 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 647 | } |
18ec7d5c SW |
648 | set_buffer_dirty(bh); |
649 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 650 | gfs2_log_lock(sdp); |
18ec7d5c SW |
651 | if (++n >= num) |
652 | break; | |
653 | } | |
654 | bh = NULL; | |
655 | total_dbuf -= num; | |
656 | total_jdata -= num; | |
b3b94faa | 657 | } |
f55ab26a SW |
658 | gfs2_log_unlock(sdp); |
659 | ||
18ec7d5c | 660 | /* Wait on all ordered buffers */ |
b3b94faa | 661 | while (!list_empty(&started)) { |
13538b8e | 662 | gfs2_log_lock(sdp); |
568f4c96 SW |
663 | bd1 = list_entry(started.next, struct gfs2_bufdata, |
664 | bd_le.le_list); | |
08867605 | 665 | list_del_init(&bd1->bd_le.le_list); |
b3b94faa | 666 | sdp->sd_log_num_databuf--; |
18ec7d5c | 667 | bh = bd1->bd_bh; |
b3b94faa | 668 | if (bh) { |
5c676f6d | 669 | bh->b_private = NULL; |
15d00c0b | 670 | get_bh(bh); |
b3b94faa DT |
671 | gfs2_log_unlock(sdp); |
672 | wait_on_buffer(bh); | |
673 | brelse(bh); | |
674 | } else | |
675 | gfs2_log_unlock(sdp); | |
676 | ||
3a8476dd | 677 | kmem_cache_free(gfs2_bufdata_cachep, bd1); |
b3b94faa DT |
678 | } |
679 | ||
18ec7d5c SW |
680 | /* We've removed all the ordered write bufs here, so only jdata left */ |
681 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); | |
682 | } | |
683 | ||
684 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
685 | struct gfs2_log_descriptor *ld, | |
686 | __be64 *ptr, int pass) | |
687 | { | |
feaa7bba SW |
688 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
689 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 690 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
691 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
692 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
693 | u64 blkno; |
694 | u64 esc; | |
18ec7d5c SW |
695 | int error = 0; |
696 | ||
697 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
698 | return 0; | |
699 | ||
700 | gfs2_replay_incr_blk(sdp, &start); | |
701 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
702 | blkno = be64_to_cpu(*ptr++); | |
703 | esc = be64_to_cpu(*ptr++); | |
704 | ||
705 | sdp->sd_found_blocks++; | |
706 | ||
707 | if (gfs2_revoke_check(sdp, blkno, start)) | |
708 | continue; | |
709 | ||
710 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
711 | if (error) | |
712 | return error; | |
713 | ||
714 | bh_ip = gfs2_meta_new(gl, blkno); | |
715 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
716 | ||
717 | /* Unescape */ | |
718 | if (esc) { | |
719 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
720 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
721 | } | |
722 | mark_buffer_dirty(bh_ip); | |
723 | ||
724 | brelse(bh_log); | |
725 | brelse(bh_ip); | |
726 | if (error) | |
727 | break; | |
728 | ||
729 | sdp->sd_replayed_blocks++; | |
730 | } | |
731 | ||
732 | return error; | |
733 | } | |
734 | ||
735 | /* FIXME: sort out accounting for log blocks etc. */ | |
736 | ||
737 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
738 | { | |
feaa7bba SW |
739 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
740 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
741 | |
742 | if (error) { | |
7276b3b0 | 743 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
744 | return; |
745 | } | |
746 | if (pass != 1) | |
747 | return; | |
748 | ||
749 | /* data sync? */ | |
7276b3b0 | 750 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
751 | |
752 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
753 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
754 | } | |
755 | ||
756 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
757 | { | |
758 | struct list_head *head = &sdp->sd_log_le_databuf; | |
759 | struct gfs2_bufdata *bd; | |
760 | ||
761 | while (!list_empty(head)) { | |
762 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
b8e1aabf | 763 | list_del_init(&bd->bd_le.le_list); |
18ec7d5c SW |
764 | sdp->sd_log_num_databuf--; |
765 | sdp->sd_log_num_jdata--; | |
766 | gfs2_unpin(sdp, bd->bd_bh, ai); | |
18ec7d5c | 767 | } |
b3b94faa | 768 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
18ec7d5c | 769 | gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
770 | } |
771 | ||
18ec7d5c | 772 | |
b09e593d | 773 | const struct gfs2_log_operations gfs2_glock_lops = { |
b3b94faa DT |
774 | .lo_add = glock_lo_add, |
775 | .lo_after_commit = glock_lo_after_commit, | |
ea67eedb | 776 | .lo_name = "glock", |
b3b94faa DT |
777 | }; |
778 | ||
b09e593d | 779 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
780 | .lo_add = buf_lo_add, |
781 | .lo_incore_commit = buf_lo_incore_commit, | |
782 | .lo_before_commit = buf_lo_before_commit, | |
783 | .lo_after_commit = buf_lo_after_commit, | |
784 | .lo_before_scan = buf_lo_before_scan, | |
785 | .lo_scan_elements = buf_lo_scan_elements, | |
786 | .lo_after_scan = buf_lo_after_scan, | |
ea67eedb | 787 | .lo_name = "buf", |
b3b94faa DT |
788 | }; |
789 | ||
b09e593d | 790 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
791 | .lo_add = revoke_lo_add, |
792 | .lo_before_commit = revoke_lo_before_commit, | |
793 | .lo_before_scan = revoke_lo_before_scan, | |
794 | .lo_scan_elements = revoke_lo_scan_elements, | |
795 | .lo_after_scan = revoke_lo_after_scan, | |
ea67eedb | 796 | .lo_name = "revoke", |
b3b94faa DT |
797 | }; |
798 | ||
b09e593d | 799 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
800 | .lo_add = rg_lo_add, |
801 | .lo_after_commit = rg_lo_after_commit, | |
ea67eedb | 802 | .lo_name = "rg", |
b3b94faa DT |
803 | }; |
804 | ||
b09e593d | 805 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 806 | .lo_add = databuf_lo_add, |
18ec7d5c | 807 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 808 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
809 | .lo_after_commit = databuf_lo_after_commit, |
810 | .lo_scan_elements = databuf_lo_scan_elements, | |
811 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 812 | .lo_name = "databuf", |
b3b94faa DT |
813 | }; |
814 | ||
b09e593d | 815 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
b3b94faa DT |
816 | &gfs2_glock_lops, |
817 | &gfs2_buf_lops, | |
818 | &gfs2_revoke_lops, | |
819 | &gfs2_rg_lops, | |
820 | &gfs2_databuf_lops, | |
ea67eedb | 821 | NULL, |
b3b94faa DT |
822 | }; |
823 |