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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
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 | |
7 | * of the GNU General Public License v.2. | |
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> | |
15 | #include <asm/semaphore.h> | |
16 | ||
17 | #include "gfs2.h" | |
18 | #include "glock.h" | |
19 | #include "log.h" | |
20 | #include "lops.h" | |
21 | #include "meta_io.h" | |
22 | #include "recovery.h" | |
23 | #include "rgrp.h" | |
24 | #include "trans.h" | |
25 | ||
26 | static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
27 | { | |
28 | struct gfs2_glock *gl; | |
29 | ||
30 | get_transaction->tr_touched = 1; | |
31 | ||
32 | if (!list_empty(&le->le_list)) | |
33 | return; | |
34 | ||
35 | gl = container_of(le, struct gfs2_glock, gl_le); | |
36 | if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) | |
37 | return; | |
38 | gfs2_glock_hold(gl); | |
39 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
40 | ||
41 | gfs2_log_lock(sdp); | |
42 | sdp->sd_log_num_gl++; | |
43 | list_add(&le->le_list, &sdp->sd_log_le_gl); | |
44 | gfs2_log_unlock(sdp); | |
45 | } | |
46 | ||
47 | static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
48 | { | |
49 | struct list_head *head = &sdp->sd_log_le_gl; | |
50 | struct gfs2_glock *gl; | |
51 | ||
52 | while (!list_empty(head)) { | |
53 | gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); | |
54 | list_del_init(&gl->gl_le.le_list); | |
55 | sdp->sd_log_num_gl--; | |
56 | ||
57 | gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); | |
58 | gfs2_glock_put(gl); | |
59 | } | |
60 | gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); | |
61 | } | |
62 | ||
63 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
64 | { | |
65 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
66 | struct gfs2_trans *tr; | |
67 | ||
68 | if (!list_empty(&bd->bd_list_tr)) | |
69 | return; | |
70 | ||
71 | tr = get_transaction; | |
72 | tr->tr_touched = 1; | |
73 | tr->tr_num_buf++; | |
74 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
75 | ||
76 | if (!list_empty(&le->le_list)) | |
77 | return; | |
78 | ||
79 | gfs2_trans_add_gl(bd->bd_gl); | |
80 | ||
81 | gfs2_meta_check(sdp, bd->bd_bh); | |
a98ab220 | 82 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
83 | |
84 | gfs2_log_lock(sdp); | |
85 | sdp->sd_log_num_buf++; | |
86 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
87 | gfs2_log_unlock(sdp); | |
88 | ||
89 | tr->tr_num_buf_new++; | |
90 | } | |
91 | ||
92 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
93 | { | |
94 | struct list_head *head = &tr->tr_list_buf; | |
95 | struct gfs2_bufdata *bd; | |
96 | ||
97 | while (!list_empty(head)) { | |
98 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
99 | list_del_init(&bd->bd_list_tr); | |
100 | tr->tr_num_buf--; | |
101 | } | |
102 | gfs2_assert_warn(sdp, !tr->tr_num_buf); | |
103 | } | |
104 | ||
105 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
106 | { | |
107 | struct buffer_head *bh; | |
108 | struct gfs2_log_descriptor *ld; | |
109 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
110 | unsigned int total = sdp->sd_log_num_buf; | |
111 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
112 | unsigned int limit; | |
113 | unsigned int num; | |
114 | unsigned n; | |
115 | __be64 *ptr; | |
116 | ||
117 | offset += (sizeof(__be64) - 1); | |
118 | offset &= ~(sizeof(__be64) - 1); | |
119 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
120 | /* for 4k blocks, limit = 503 */ | |
121 | ||
122 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); | |
123 | while(total) { | |
124 | num = total; | |
125 | if (total > limit) | |
126 | num = limit; | |
127 | bh = gfs2_log_get_buf(sdp); | |
128 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
129 | ptr = (__be64 *)(bh->b_data + offset); | |
130 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
131 | ld->ld_header.mh_type = cpu_to_be16(GFS2_METATYPE_LD); | |
132 | ld->ld_header.mh_format = cpu_to_be16(GFS2_FORMAT_LD); | |
133 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); | |
134 | ld->ld_length = cpu_to_be32(num + 1); | |
135 | ld->ld_data1 = cpu_to_be32(num); | |
136 | ld->ld_data2 = cpu_to_be32(0); | |
137 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
138 | ||
139 | n = 0; | |
140 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, bd_le.le_list) { | |
141 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); | |
142 | if (++n >= num) | |
143 | break; | |
144 | } | |
145 | ||
146 | set_buffer_dirty(bh); | |
147 | ll_rw_block(WRITE, 1, &bh); | |
148 | ||
149 | n = 0; | |
150 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, bd_le.le_list) { | |
151 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
152 | set_buffer_dirty(bh); | |
153 | ll_rw_block(WRITE, 1, &bh); | |
154 | if (++n >= num) | |
155 | break; | |
156 | } | |
157 | ||
158 | total -= num; | |
159 | } | |
160 | } | |
161 | ||
162 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
163 | { | |
164 | struct list_head *head = &sdp->sd_log_le_buf; | |
165 | struct gfs2_bufdata *bd; | |
166 | ||
167 | while (!list_empty(head)) { | |
168 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
169 | list_del_init(&bd->bd_le.le_list); | |
170 | sdp->sd_log_num_buf--; | |
171 | ||
a98ab220 | 172 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
173 | } |
174 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
175 | } | |
176 | ||
177 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
178 | struct gfs2_log_header *head, int pass) | |
179 | { | |
7359a19c | 180 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
b3b94faa DT |
181 | |
182 | if (pass != 0) | |
183 | return; | |
184 | ||
185 | sdp->sd_found_blocks = 0; | |
186 | sdp->sd_replayed_blocks = 0; | |
187 | } | |
188 | ||
189 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
190 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
191 | int pass) | |
192 | { | |
7359a19c SW |
193 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
194 | struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl; | |
b3b94faa DT |
195 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
196 | struct buffer_head *bh_log, *bh_ip; | |
197 | uint64_t blkno; | |
198 | int error = 0; | |
199 | ||
200 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
201 | return 0; | |
202 | ||
203 | gfs2_replay_incr_blk(sdp, &start); | |
204 | ||
205 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
206 | blkno = be64_to_cpu(*ptr++); | |
207 | ||
208 | sdp->sd_found_blocks++; | |
209 | ||
210 | if (gfs2_revoke_check(sdp, blkno, start)) | |
211 | continue; | |
212 | ||
213 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
214 | if (error) | |
215 | return error; | |
216 | ||
217 | bh_ip = gfs2_meta_new(gl, blkno); | |
218 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
219 | ||
220 | if (gfs2_meta_check(sdp, bh_ip)) | |
221 | error = -EIO; | |
222 | else | |
223 | mark_buffer_dirty(bh_ip); | |
224 | ||
225 | brelse(bh_log); | |
226 | brelse(bh_ip); | |
227 | ||
228 | if (error) | |
229 | break; | |
230 | ||
231 | sdp->sd_replayed_blocks++; | |
232 | } | |
233 | ||
234 | return error; | |
235 | } | |
236 | ||
237 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
238 | { | |
7359a19c | 239 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
b3b94faa DT |
240 | |
241 | if (error) { | |
7359a19c | 242 | gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT); |
b3b94faa DT |
243 | return; |
244 | } | |
245 | if (pass != 1) | |
246 | return; | |
247 | ||
7359a19c | 248 | gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT); |
b3b94faa DT |
249 | |
250 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
251 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
252 | } | |
253 | ||
254 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
255 | { | |
256 | struct gfs2_trans *tr; | |
257 | ||
258 | tr = get_transaction; | |
259 | tr->tr_touched = 1; | |
260 | tr->tr_num_revoke++; | |
261 | ||
262 | gfs2_log_lock(sdp); | |
263 | sdp->sd_log_num_revoke++; | |
264 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
265 | gfs2_log_unlock(sdp); | |
266 | } | |
267 | ||
268 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
269 | { | |
270 | struct gfs2_log_descriptor *ld; | |
271 | struct gfs2_meta_header *mh; | |
272 | struct buffer_head *bh; | |
273 | unsigned int offset; | |
274 | struct list_head *head = &sdp->sd_log_le_revoke; | |
275 | struct gfs2_revoke *rv; | |
276 | ||
277 | if (!sdp->sd_log_num_revoke) | |
278 | return; | |
279 | ||
280 | bh = gfs2_log_get_buf(sdp); | |
281 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
282 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
283 | ld->ld_header.mh_type = cpu_to_be16(GFS2_METATYPE_LD); | |
284 | ld->ld_header.mh_format = cpu_to_be16(GFS2_FORMAT_LD); | |
285 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); | |
286 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(uint64_t))); | |
287 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); | |
288 | ld->ld_data2 = cpu_to_be32(0); | |
289 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
290 | offset = sizeof(struct gfs2_log_descriptor); | |
291 | ||
292 | while (!list_empty(head)) { | |
293 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 294 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
295 | sdp->sd_log_num_revoke--; |
296 | ||
297 | if (offset + sizeof(uint64_t) > sdp->sd_sb.sb_bsize) { | |
298 | set_buffer_dirty(bh); | |
299 | ll_rw_block(WRITE, 1, &bh); | |
300 | ||
301 | bh = gfs2_log_get_buf(sdp); | |
302 | mh = (struct gfs2_meta_header *)bh->b_data; | |
303 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
304 | mh->mh_type = cpu_to_be16(GFS2_METATYPE_LB); | |
305 | mh->mh_format = cpu_to_be16(GFS2_FORMAT_LB); | |
306 | offset = sizeof(struct gfs2_meta_header); | |
307 | } | |
308 | ||
309 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
310 | kfree(rv); | |
311 | ||
312 | offset += sizeof(uint64_t); | |
313 | } | |
314 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
315 | ||
316 | set_buffer_dirty(bh); | |
317 | ll_rw_block(WRITE, 1, &bh); | |
318 | } | |
319 | ||
320 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
321 | struct gfs2_log_header *head, int pass) | |
322 | { | |
7359a19c | 323 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
b3b94faa DT |
324 | |
325 | if (pass != 0) | |
326 | return; | |
327 | ||
328 | sdp->sd_found_revokes = 0; | |
329 | sdp->sd_replay_tail = head->lh_tail; | |
330 | } | |
331 | ||
332 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
333 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
334 | int pass) | |
335 | { | |
7359a19c | 336 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
b3b94faa DT |
337 | unsigned int blks = be32_to_cpu(ld->ld_length); |
338 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
339 | struct buffer_head *bh; | |
340 | unsigned int offset; | |
341 | uint64_t blkno; | |
342 | int first = 1; | |
343 | int error; | |
344 | ||
345 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
346 | return 0; | |
347 | ||
348 | offset = sizeof(struct gfs2_log_descriptor); | |
349 | ||
350 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
351 | error = gfs2_replay_read_block(jd, start, &bh); | |
352 | if (error) | |
353 | return error; | |
354 | ||
355 | if (!first) | |
356 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
357 | ||
358 | while (offset + sizeof(uint64_t) <= sdp->sd_sb.sb_bsize) { | |
359 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); | |
360 | ||
361 | error = gfs2_revoke_add(sdp, blkno, start); | |
362 | if (error < 0) | |
363 | return error; | |
364 | else if (error) | |
365 | sdp->sd_found_revokes++; | |
366 | ||
367 | if (!--revokes) | |
368 | break; | |
369 | offset += sizeof(uint64_t); | |
370 | } | |
371 | ||
372 | brelse(bh); | |
373 | offset = sizeof(struct gfs2_meta_header); | |
374 | first = 0; | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
381 | { | |
7359a19c | 382 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
b3b94faa DT |
383 | |
384 | if (error) { | |
385 | gfs2_revoke_clean(sdp); | |
386 | return; | |
387 | } | |
388 | if (pass != 1) | |
389 | return; | |
390 | ||
391 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
392 | jd->jd_jid, sdp->sd_found_revokes); | |
393 | ||
394 | gfs2_revoke_clean(sdp); | |
395 | } | |
396 | ||
397 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
398 | { | |
399 | struct gfs2_rgrpd *rgd; | |
400 | ||
401 | get_transaction->tr_touched = 1; | |
402 | ||
403 | if (!list_empty(&le->le_list)) | |
404 | return; | |
405 | ||
406 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); | |
407 | gfs2_rgrp_bh_hold(rgd); | |
408 | ||
409 | gfs2_log_lock(sdp); | |
410 | sdp->sd_log_num_rg++; | |
411 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
412 | gfs2_log_unlock(sdp); | |
413 | } | |
414 | ||
415 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
416 | { | |
417 | struct list_head *head = &sdp->sd_log_le_rg; | |
418 | struct gfs2_rgrpd *rgd; | |
419 | ||
420 | while (!list_empty(head)) { | |
421 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
422 | list_del_init(&rgd->rd_le.le_list); | |
423 | sdp->sd_log_num_rg--; | |
424 | ||
425 | gfs2_rgrp_repolish_clones(rgd); | |
426 | gfs2_rgrp_bh_put(rgd); | |
427 | } | |
428 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
429 | } | |
430 | ||
18ec7d5c SW |
431 | /** |
432 | * databuf_lo_add - Add a databuf to the transaction. | |
433 | * | |
434 | * This is used in two distinct cases: | |
435 | * i) In ordered write mode | |
436 | * We put the data buffer on a list so that we can ensure that its | |
437 | * synced to disk at the right time | |
438 | * ii) In journaled data mode | |
439 | * We need to journal the data block in the same way as metadata in | |
440 | * the functions above. The difference is that here we have a tag | |
441 | * which is two __be64's being the block number (as per meta data) | |
442 | * and a flag which says whether the data block needs escaping or | |
443 | * not. This means we need a new log entry for each 251 or so data | |
444 | * blocks, which isn't an enormous overhead but twice as much as | |
445 | * for normal metadata blocks. | |
446 | */ | |
b3b94faa DT |
447 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
448 | { | |
18ec7d5c SW |
449 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
450 | struct gfs2_trans *tr = get_transaction; | |
451 | struct address_space *mapping = bd->bd_bh->b_page->mapping; | |
452 | struct gfs2_inode *ip = get_v2ip(mapping->host); | |
b3b94faa | 453 | |
18ec7d5c SW |
454 | tr->tr_touched = 1; |
455 | if (!list_empty(&bd->bd_list_tr) && | |
456 | (ip->i_di.di_flags & GFS2_DIF_JDATA)) { | |
457 | tr->tr_num_buf++; | |
458 | gfs2_trans_add_gl(bd->bd_gl); | |
459 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
460 | gfs2_pin(sdp, bd->bd_bh); | |
18ec7d5c | 461 | } |
b3b94faa | 462 | gfs2_log_lock(sdp); |
13538b8e SW |
463 | if (!list_empty(&le->le_list)) { |
464 | if (ip->i_di.di_flags & GFS2_DIF_JDATA) | |
465 | sdp->sd_log_num_jdata++; | |
466 | sdp->sd_log_num_databuf++; | |
467 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
468 | } | |
b3b94faa DT |
469 | gfs2_log_unlock(sdp); |
470 | } | |
471 | ||
18ec7d5c SW |
472 | static int gfs2_check_magic(struct buffer_head *bh) |
473 | { | |
474 | struct page *page = bh->b_page; | |
475 | void *kaddr; | |
476 | __be32 *ptr; | |
477 | int rv = 0; | |
478 | ||
479 | kaddr = kmap_atomic(page, KM_USER0); | |
480 | ptr = kaddr + bh_offset(bh); | |
481 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
482 | rv = 1; | |
483 | kunmap_atomic(page, KM_USER0); | |
484 | ||
485 | return rv; | |
486 | } | |
487 | ||
488 | /** | |
489 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
490 | * | |
491 | * Here we scan through the lists of buffers and make the assumption | |
492 | * that any buffer thats been pinned is being journaled, and that | |
493 | * any unpinned buffer is an ordered write data buffer and therefore | |
494 | * will be written back rather than journaled. | |
495 | */ | |
b3b94faa DT |
496 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
497 | { | |
b3b94faa | 498 | LIST_HEAD(started); |
18ec7d5c SW |
499 | struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
500 | struct buffer_head *bh = NULL; | |
501 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
502 | struct gfs2_log_descriptor *ld; | |
503 | unsigned int limit; | |
504 | unsigned int total_dbuf = sdp->sd_log_num_databuf; | |
505 | unsigned int total_jdata = sdp->sd_log_num_jdata; | |
506 | unsigned int num, n; | |
f55ab26a | 507 | __be64 *ptr = NULL; |
b3b94faa | 508 | |
18ec7d5c SW |
509 | offset += (2*sizeof(__be64) - 1); |
510 | offset &= ~(2*sizeof(__be64) - 1); | |
511 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
b3b94faa | 512 | |
18ec7d5c SW |
513 | /* |
514 | * Start writing ordered buffers, write journaled buffers | |
515 | * into the log along with a header | |
516 | */ | |
f55ab26a | 517 | gfs2_log_lock(sdp); |
18ec7d5c SW |
518 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, bd_le.le_list); |
519 | while(total_dbuf) { | |
520 | num = total_jdata; | |
521 | if (num > limit) | |
522 | num = limit; | |
523 | n = 0; | |
524 | list_for_each_entry_safe_continue(bd1, bdt, &sdp->sd_log_le_databuf, bd_le.le_list) { | |
18ec7d5c SW |
525 | /* An ordered write buffer */ |
526 | if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) { | |
527 | list_move(&bd1->bd_le.le_list, &started); | |
528 | if (bd1 == bd2) { | |
529 | bd2 = NULL; | |
530 | bd2 = list_prepare_entry(bd2, &sdp->sd_log_le_databuf, bd_le.le_list); | |
531 | } | |
532 | total_dbuf--; | |
533 | if (bd1->bd_bh) { | |
534 | get_bh(bd1->bd_bh); | |
18ec7d5c | 535 | if (buffer_dirty(bd1->bd_bh)) { |
f55ab26a | 536 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
537 | wait_on_buffer(bd1->bd_bh); |
538 | ll_rw_block(WRITE, 1, &bd1->bd_bh); | |
f55ab26a | 539 | gfs2_log_lock(sdp); |
18ec7d5c SW |
540 | } |
541 | brelse(bd1->bd_bh); | |
542 | continue; | |
543 | } | |
18ec7d5c SW |
544 | continue; |
545 | } else if (bd1->bd_bh) { /* A journaled buffer */ | |
546 | int magic; | |
547 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
548 | if (!bh) { |
549 | bh = gfs2_log_get_buf(sdp); | |
550 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
551 | ptr = (__be64 *)(bh->b_data + offset); | |
552 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
553 | ld->ld_header.mh_type = cpu_to_be16(GFS2_METATYPE_LD); | |
554 | ld->ld_header.mh_format = cpu_to_be16(GFS2_FORMAT_LD); | |
555 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
556 | ld->ld_length = cpu_to_be32(num + 1); | |
557 | ld->ld_data1 = cpu_to_be32(num); | |
558 | ld->ld_data2 = cpu_to_be32(0); | |
559 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
560 | } | |
561 | magic = gfs2_check_magic(bd1->bd_bh); | |
562 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); | |
563 | *ptr++ = cpu_to_be64((__u64)magic); | |
564 | clear_buffer_escaped(bd1->bd_bh); | |
565 | if (unlikely(magic != 0)) | |
566 | set_buffer_escaped(bd1->bd_bh); | |
f55ab26a | 567 | gfs2_log_lock(sdp); |
18ec7d5c SW |
568 | if (n++ > num) |
569 | break; | |
570 | } | |
571 | } | |
f55ab26a | 572 | gfs2_log_unlock(sdp); |
b3b94faa | 573 | if (bh) { |
18ec7d5c SW |
574 | set_buffer_dirty(bh); |
575 | ll_rw_block(WRITE, 1, &bh); | |
576 | bh = NULL; | |
577 | } | |
578 | n = 0; | |
f55ab26a | 579 | gfs2_log_lock(sdp); |
18ec7d5c SW |
580 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, bd_le.le_list) { |
581 | if (!bd2->bd_bh) | |
582 | continue; | |
583 | /* copy buffer if it needs escaping */ | |
f55ab26a | 584 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
585 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
586 | void *kaddr; | |
587 | struct page *page = bd2->bd_bh->b_page; | |
588 | bh = gfs2_log_get_buf(sdp); | |
589 | kaddr = kmap_atomic(page, KM_USER0); | |
590 | memcpy(bh->b_data, kaddr + bh_offset(bd2->bd_bh), sdp->sd_sb.sb_bsize); | |
591 | kunmap_atomic(page, KM_USER0); | |
592 | *(__be32 *)bh->b_data = 0; | |
593 | } else { | |
594 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 595 | } |
18ec7d5c SW |
596 | set_buffer_dirty(bh); |
597 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 598 | gfs2_log_lock(sdp); |
18ec7d5c SW |
599 | if (++n >= num) |
600 | break; | |
601 | } | |
602 | bh = NULL; | |
603 | total_dbuf -= num; | |
604 | total_jdata -= num; | |
b3b94faa | 605 | } |
f55ab26a SW |
606 | gfs2_log_unlock(sdp); |
607 | ||
18ec7d5c | 608 | /* Wait on all ordered buffers */ |
b3b94faa | 609 | while (!list_empty(&started)) { |
13538b8e | 610 | gfs2_log_lock(sdp); |
18ec7d5c SW |
611 | bd1 = list_entry(started.next, struct gfs2_bufdata, bd_le.le_list); |
612 | list_del(&bd1->bd_le.le_list); | |
b3b94faa DT |
613 | sdp->sd_log_num_databuf--; |
614 | ||
18ec7d5c | 615 | bh = bd1->bd_bh; |
b3b94faa | 616 | if (bh) { |
64fb4eb7 | 617 | set_v2bd(bh, NULL); |
b3b94faa DT |
618 | gfs2_log_unlock(sdp); |
619 | wait_on_buffer(bh); | |
620 | brelse(bh); | |
621 | } else | |
622 | gfs2_log_unlock(sdp); | |
623 | ||
18ec7d5c | 624 | kfree(bd1); |
b3b94faa DT |
625 | } |
626 | ||
18ec7d5c SW |
627 | /* We've removed all the ordered write bufs here, so only jdata left */ |
628 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); | |
629 | } | |
630 | ||
631 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
632 | struct gfs2_log_descriptor *ld, | |
633 | __be64 *ptr, int pass) | |
634 | { | |
7359a19c SW |
635 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
636 | struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl; | |
18ec7d5c SW |
637 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
638 | struct buffer_head *bh_log, *bh_ip; | |
639 | uint64_t blkno; | |
640 | uint64_t esc; | |
641 | int error = 0; | |
642 | ||
643 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
644 | return 0; | |
645 | ||
646 | gfs2_replay_incr_blk(sdp, &start); | |
647 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
648 | blkno = be64_to_cpu(*ptr++); | |
649 | esc = be64_to_cpu(*ptr++); | |
650 | ||
651 | sdp->sd_found_blocks++; | |
652 | ||
653 | if (gfs2_revoke_check(sdp, blkno, start)) | |
654 | continue; | |
655 | ||
656 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
657 | if (error) | |
658 | return error; | |
659 | ||
660 | bh_ip = gfs2_meta_new(gl, blkno); | |
661 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
662 | ||
663 | /* Unescape */ | |
664 | if (esc) { | |
665 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
666 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
667 | } | |
668 | mark_buffer_dirty(bh_ip); | |
669 | ||
670 | brelse(bh_log); | |
671 | brelse(bh_ip); | |
672 | if (error) | |
673 | break; | |
674 | ||
675 | sdp->sd_replayed_blocks++; | |
676 | } | |
677 | ||
678 | return error; | |
679 | } | |
680 | ||
681 | /* FIXME: sort out accounting for log blocks etc. */ | |
682 | ||
683 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
684 | { | |
7359a19c | 685 | struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd; |
18ec7d5c SW |
686 | |
687 | if (error) { | |
7359a19c | 688 | gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT); |
18ec7d5c SW |
689 | return; |
690 | } | |
691 | if (pass != 1) | |
692 | return; | |
693 | ||
694 | /* data sync? */ | |
7359a19c | 695 | gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT); |
18ec7d5c SW |
696 | |
697 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
698 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
699 | } | |
700 | ||
701 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
702 | { | |
703 | struct list_head *head = &sdp->sd_log_le_databuf; | |
704 | struct gfs2_bufdata *bd; | |
705 | ||
706 | while (!list_empty(head)) { | |
707 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
f55ab26a | 708 | list_del(&bd->bd_le.le_list); |
18ec7d5c SW |
709 | sdp->sd_log_num_databuf--; |
710 | sdp->sd_log_num_jdata--; | |
711 | gfs2_unpin(sdp, bd->bd_bh, ai); | |
18ec7d5c | 712 | } |
b3b94faa | 713 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
18ec7d5c | 714 | gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
715 | } |
716 | ||
18ec7d5c | 717 | |
b3b94faa DT |
718 | struct gfs2_log_operations gfs2_glock_lops = { |
719 | .lo_add = glock_lo_add, | |
720 | .lo_after_commit = glock_lo_after_commit, | |
721 | .lo_name = "glock" | |
722 | }; | |
723 | ||
724 | struct gfs2_log_operations gfs2_buf_lops = { | |
725 | .lo_add = buf_lo_add, | |
726 | .lo_incore_commit = buf_lo_incore_commit, | |
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, | |
732 | .lo_name = "buf" | |
733 | }; | |
734 | ||
735 | struct gfs2_log_operations gfs2_revoke_lops = { | |
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, | |
741 | .lo_name = "revoke" | |
742 | }; | |
743 | ||
744 | struct gfs2_log_operations gfs2_rg_lops = { | |
745 | .lo_add = rg_lo_add, | |
746 | .lo_after_commit = rg_lo_after_commit, | |
747 | .lo_name = "rg" | |
748 | }; | |
749 | ||
750 | struct gfs2_log_operations gfs2_databuf_lops = { | |
751 | .lo_add = databuf_lo_add, | |
18ec7d5c | 752 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 753 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
754 | .lo_after_commit = databuf_lo_after_commit, |
755 | .lo_scan_elements = databuf_lo_scan_elements, | |
756 | .lo_after_scan = databuf_lo_after_scan, | |
b3b94faa DT |
757 | .lo_name = "databuf" |
758 | }; | |
759 | ||
760 | struct gfs2_log_operations *gfs2_log_ops[] = { | |
761 | &gfs2_glock_lops, | |
762 | &gfs2_buf_lops, | |
763 | &gfs2_revoke_lops, | |
764 | &gfs2_rg_lops, | |
765 | &gfs2_databuf_lops, | |
766 | NULL | |
767 | }; | |
768 |