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 | |
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> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
16 | |
17 | #include "gfs2.h" | |
5c676f6d SW |
18 | #include "lm_interface.h" |
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 | ||
72 | if (!list_empty(&bd->bd_list_tr)) | |
73 | return; | |
74 | ||
5c676f6d | 75 | tr = current->journal_info; |
b3b94faa DT |
76 | tr->tr_touched = 1; |
77 | tr->tr_num_buf++; | |
78 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
79 | ||
80 | if (!list_empty(&le->le_list)) | |
81 | return; | |
82 | ||
83 | gfs2_trans_add_gl(bd->bd_gl); | |
84 | ||
85 | gfs2_meta_check(sdp, bd->bd_bh); | |
a98ab220 | 86 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
87 | |
88 | gfs2_log_lock(sdp); | |
89 | sdp->sd_log_num_buf++; | |
90 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
91 | gfs2_log_unlock(sdp); | |
92 | ||
93 | tr->tr_num_buf_new++; | |
94 | } | |
95 | ||
96 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
97 | { | |
98 | struct list_head *head = &tr->tr_list_buf; | |
99 | struct gfs2_bufdata *bd; | |
100 | ||
101 | while (!list_empty(head)) { | |
102 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
103 | list_del_init(&bd->bd_list_tr); | |
104 | tr->tr_num_buf--; | |
105 | } | |
106 | gfs2_assert_warn(sdp, !tr->tr_num_buf); | |
107 | } | |
108 | ||
109 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
110 | { | |
111 | struct buffer_head *bh; | |
112 | struct gfs2_log_descriptor *ld; | |
113 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
114 | unsigned int total = sdp->sd_log_num_buf; | |
115 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
116 | unsigned int limit; | |
117 | unsigned int num; | |
118 | unsigned n; | |
119 | __be64 *ptr; | |
120 | ||
121 | offset += (sizeof(__be64) - 1); | |
122 | offset &= ~(sizeof(__be64) - 1); | |
123 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
124 | /* for 4k blocks, limit = 503 */ | |
125 | ||
126 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); | |
127 | while(total) { | |
128 | num = total; | |
129 | if (total > limit) | |
130 | num = limit; | |
131 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 132 | sdp->sd_log_num_hdrs++; |
b3b94faa DT |
133 | ld = (struct gfs2_log_descriptor *)bh->b_data; |
134 | ptr = (__be64 *)(bh->b_data + offset); | |
135 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
136 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
137 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa DT |
138 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
139 | ld->ld_length = cpu_to_be32(num + 1); | |
140 | ld->ld_data1 = cpu_to_be32(num); | |
141 | ld->ld_data2 = cpu_to_be32(0); | |
142 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
143 | ||
144 | n = 0; | |
568f4c96 SW |
145 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
146 | bd_le.le_list) { | |
b3b94faa DT |
147 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
148 | if (++n >= num) | |
149 | break; | |
150 | } | |
151 | ||
152 | set_buffer_dirty(bh); | |
153 | ll_rw_block(WRITE, 1, &bh); | |
154 | ||
155 | n = 0; | |
568f4c96 SW |
156 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
157 | bd_le.le_list) { | |
b3b94faa DT |
158 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
159 | set_buffer_dirty(bh); | |
160 | ll_rw_block(WRITE, 1, &bh); | |
161 | if (++n >= num) | |
162 | break; | |
163 | } | |
164 | ||
165 | total -= num; | |
166 | } | |
167 | } | |
168 | ||
169 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
170 | { | |
171 | struct list_head *head = &sdp->sd_log_le_buf; | |
172 | struct gfs2_bufdata *bd; | |
173 | ||
174 | while (!list_empty(head)) { | |
175 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
176 | list_del_init(&bd->bd_le.le_list); | |
177 | sdp->sd_log_num_buf--; | |
178 | ||
a98ab220 | 179 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
180 | } |
181 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
182 | } | |
183 | ||
184 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
185 | struct gfs2_log_header *head, int pass) | |
186 | { | |
feaa7bba | 187 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
188 | |
189 | if (pass != 0) | |
190 | return; | |
191 | ||
192 | sdp->sd_found_blocks = 0; | |
193 | sdp->sd_replayed_blocks = 0; | |
194 | } | |
195 | ||
196 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
197 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
198 | int pass) | |
199 | { | |
feaa7bba SW |
200 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
201 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 202 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
203 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
204 | struct buffer_head *bh_log, *bh_ip; | |
205 | uint64_t blkno; | |
206 | int error = 0; | |
207 | ||
208 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
209 | return 0; | |
210 | ||
211 | gfs2_replay_incr_blk(sdp, &start); | |
212 | ||
213 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
214 | blkno = be64_to_cpu(*ptr++); | |
215 | ||
216 | sdp->sd_found_blocks++; | |
217 | ||
218 | if (gfs2_revoke_check(sdp, blkno, start)) | |
219 | continue; | |
220 | ||
221 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
222 | if (error) | |
223 | return error; | |
224 | ||
225 | bh_ip = gfs2_meta_new(gl, blkno); | |
226 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
227 | ||
228 | if (gfs2_meta_check(sdp, bh_ip)) | |
229 | error = -EIO; | |
230 | else | |
231 | mark_buffer_dirty(bh_ip); | |
232 | ||
233 | brelse(bh_log); | |
234 | brelse(bh_ip); | |
235 | ||
236 | if (error) | |
237 | break; | |
238 | ||
239 | sdp->sd_replayed_blocks++; | |
240 | } | |
241 | ||
242 | return error; | |
243 | } | |
244 | ||
245 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
246 | { | |
feaa7bba SW |
247 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
248 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
249 | |
250 | if (error) { | |
5c676f6d | 251 | gfs2_meta_sync(ip->i_gl, |
568f4c96 | 252 | DIO_START | DIO_WAIT); |
b3b94faa DT |
253 | return; |
254 | } | |
255 | if (pass != 1) | |
256 | return; | |
257 | ||
5c676f6d | 258 | gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT); |
b3b94faa DT |
259 | |
260 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
261 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
262 | } | |
263 | ||
264 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
265 | { | |
266 | struct gfs2_trans *tr; | |
267 | ||
5c676f6d | 268 | tr = current->journal_info; |
b3b94faa DT |
269 | tr->tr_touched = 1; |
270 | tr->tr_num_revoke++; | |
271 | ||
272 | gfs2_log_lock(sdp); | |
273 | sdp->sd_log_num_revoke++; | |
274 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
275 | gfs2_log_unlock(sdp); | |
276 | } | |
277 | ||
278 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
279 | { | |
280 | struct gfs2_log_descriptor *ld; | |
281 | struct gfs2_meta_header *mh; | |
282 | struct buffer_head *bh; | |
283 | unsigned int offset; | |
284 | struct list_head *head = &sdp->sd_log_le_revoke; | |
285 | struct gfs2_revoke *rv; | |
286 | ||
287 | if (!sdp->sd_log_num_revoke) | |
288 | return; | |
289 | ||
290 | bh = gfs2_log_get_buf(sdp); | |
291 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
292 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
293 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
294 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa | 295 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); |
568f4c96 SW |
296 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
297 | sizeof(uint64_t))); | |
b3b94faa DT |
298 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
299 | ld->ld_data2 = cpu_to_be32(0); | |
300 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
301 | offset = sizeof(struct gfs2_log_descriptor); | |
302 | ||
303 | while (!list_empty(head)) { | |
304 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 305 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
306 | sdp->sd_log_num_revoke--; |
307 | ||
308 | if (offset + sizeof(uint64_t) > sdp->sd_sb.sb_bsize) { | |
309 | set_buffer_dirty(bh); | |
310 | ll_rw_block(WRITE, 1, &bh); | |
311 | ||
312 | bh = gfs2_log_get_buf(sdp); | |
313 | mh = (struct gfs2_meta_header *)bh->b_data; | |
314 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
315 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
316 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
317 | offset = sizeof(struct gfs2_meta_header); |
318 | } | |
319 | ||
320 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
321 | kfree(rv); | |
322 | ||
323 | offset += sizeof(uint64_t); | |
324 | } | |
325 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
326 | ||
327 | set_buffer_dirty(bh); | |
328 | ll_rw_block(WRITE, 1, &bh); | |
329 | } | |
330 | ||
331 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
332 | struct gfs2_log_header *head, int pass) | |
333 | { | |
feaa7bba | 334 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
335 | |
336 | if (pass != 0) | |
337 | return; | |
338 | ||
339 | sdp->sd_found_revokes = 0; | |
340 | sdp->sd_replay_tail = head->lh_tail; | |
341 | } | |
342 | ||
343 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
344 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
345 | int pass) | |
346 | { | |
feaa7bba | 347 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
348 | unsigned int blks = be32_to_cpu(ld->ld_length); |
349 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
350 | struct buffer_head *bh; | |
351 | unsigned int offset; | |
352 | uint64_t blkno; | |
353 | int first = 1; | |
354 | int error; | |
355 | ||
356 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
357 | return 0; | |
358 | ||
359 | offset = sizeof(struct gfs2_log_descriptor); | |
360 | ||
361 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
362 | error = gfs2_replay_read_block(jd, start, &bh); | |
363 | if (error) | |
364 | return error; | |
365 | ||
366 | if (!first) | |
367 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
368 | ||
369 | while (offset + sizeof(uint64_t) <= sdp->sd_sb.sb_bsize) { | |
370 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); | |
371 | ||
372 | error = gfs2_revoke_add(sdp, blkno, start); | |
373 | if (error < 0) | |
374 | return error; | |
375 | else if (error) | |
376 | sdp->sd_found_revokes++; | |
377 | ||
378 | if (!--revokes) | |
379 | break; | |
380 | offset += sizeof(uint64_t); | |
381 | } | |
382 | ||
383 | brelse(bh); | |
384 | offset = sizeof(struct gfs2_meta_header); | |
385 | first = 0; | |
386 | } | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
392 | { | |
feaa7bba | 393 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
394 | |
395 | if (error) { | |
396 | gfs2_revoke_clean(sdp); | |
397 | return; | |
398 | } | |
399 | if (pass != 1) | |
400 | return; | |
401 | ||
402 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
403 | jd->jd_jid, sdp->sd_found_revokes); | |
404 | ||
405 | gfs2_revoke_clean(sdp); | |
406 | } | |
407 | ||
408 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
409 | { | |
410 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 411 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 412 | |
5c676f6d | 413 | tr->tr_touched = 1; |
b3b94faa DT |
414 | |
415 | if (!list_empty(&le->le_list)) | |
416 | return; | |
417 | ||
418 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); | |
419 | gfs2_rgrp_bh_hold(rgd); | |
420 | ||
421 | gfs2_log_lock(sdp); | |
422 | sdp->sd_log_num_rg++; | |
423 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
424 | gfs2_log_unlock(sdp); | |
425 | } | |
426 | ||
427 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
428 | { | |
429 | struct list_head *head = &sdp->sd_log_le_rg; | |
430 | struct gfs2_rgrpd *rgd; | |
431 | ||
432 | while (!list_empty(head)) { | |
433 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
434 | list_del_init(&rgd->rd_le.le_list); | |
435 | sdp->sd_log_num_rg--; | |
436 | ||
437 | gfs2_rgrp_repolish_clones(rgd); | |
438 | gfs2_rgrp_bh_put(rgd); | |
439 | } | |
440 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
441 | } | |
442 | ||
18ec7d5c SW |
443 | /** |
444 | * databuf_lo_add - Add a databuf to the transaction. | |
445 | * | |
446 | * This is used in two distinct cases: | |
447 | * i) In ordered write mode | |
448 | * We put the data buffer on a list so that we can ensure that its | |
449 | * synced to disk at the right time | |
450 | * ii) In journaled data mode | |
451 | * We need to journal the data block in the same way as metadata in | |
452 | * the functions above. The difference is that here we have a tag | |
453 | * which is two __be64's being the block number (as per meta data) | |
454 | * and a flag which says whether the data block needs escaping or | |
455 | * not. This means we need a new log entry for each 251 or so data | |
456 | * blocks, which isn't an enormous overhead but twice as much as | |
457 | * for normal metadata blocks. | |
458 | */ | |
b3b94faa DT |
459 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
460 | { | |
18ec7d5c | 461 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 462 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 463 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 464 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 465 | |
18ec7d5c | 466 | tr->tr_touched = 1; |
15d00c0b | 467 | if (list_empty(&bd->bd_list_tr) && |
18ec7d5c SW |
468 | (ip->i_di.di_flags & GFS2_DIF_JDATA)) { |
469 | tr->tr_num_buf++; | |
18ec7d5c SW |
470 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); |
471 | gfs2_pin(sdp, bd->bd_bh); | |
b4dc7291 | 472 | tr->tr_num_buf_new++; |
18ec7d5c | 473 | } |
b61dde79 | 474 | gfs2_trans_add_gl(bd->bd_gl); |
b3b94faa | 475 | gfs2_log_lock(sdp); |
15d00c0b | 476 | if (list_empty(&le->le_list)) { |
13538b8e SW |
477 | if (ip->i_di.di_flags & GFS2_DIF_JDATA) |
478 | sdp->sd_log_num_jdata++; | |
479 | sdp->sd_log_num_databuf++; | |
480 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
481 | } | |
b3b94faa DT |
482 | gfs2_log_unlock(sdp); |
483 | } | |
484 | ||
18ec7d5c SW |
485 | static int gfs2_check_magic(struct buffer_head *bh) |
486 | { | |
487 | struct page *page = bh->b_page; | |
488 | void *kaddr; | |
489 | __be32 *ptr; | |
490 | int rv = 0; | |
491 | ||
492 | kaddr = kmap_atomic(page, KM_USER0); | |
493 | ptr = kaddr + bh_offset(bh); | |
494 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
495 | rv = 1; | |
496 | kunmap_atomic(page, KM_USER0); | |
497 | ||
498 | return rv; | |
499 | } | |
500 | ||
501 | /** | |
502 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
503 | * | |
504 | * Here we scan through the lists of buffers and make the assumption | |
505 | * that any buffer thats been pinned is being journaled, and that | |
506 | * any unpinned buffer is an ordered write data buffer and therefore | |
507 | * will be written back rather than journaled. | |
508 | */ | |
b3b94faa DT |
509 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
510 | { | |
b3b94faa | 511 | LIST_HEAD(started); |
18ec7d5c SW |
512 | struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
513 | struct buffer_head *bh = NULL; | |
514 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
515 | struct gfs2_log_descriptor *ld; | |
516 | unsigned int limit; | |
517 | unsigned int total_dbuf = sdp->sd_log_num_databuf; | |
518 | unsigned int total_jdata = sdp->sd_log_num_jdata; | |
519 | unsigned int num, n; | |
f55ab26a | 520 | __be64 *ptr = NULL; |
b3b94faa | 521 | |
18ec7d5c SW |
522 | offset += (2*sizeof(__be64) - 1); |
523 | offset &= ~(2*sizeof(__be64) - 1); | |
524 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
b3b94faa | 525 | |
18ec7d5c SW |
526 | /* |
527 | * Start writing ordered buffers, write journaled buffers | |
528 | * into the log along with a header | |
529 | */ | |
f55ab26a | 530 | gfs2_log_lock(sdp); |
568f4c96 SW |
531 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, |
532 | bd_le.le_list); | |
18ec7d5c SW |
533 | while(total_dbuf) { |
534 | num = total_jdata; | |
535 | if (num > limit) | |
536 | num = limit; | |
537 | n = 0; | |
568f4c96 SW |
538 | list_for_each_entry_safe_continue(bd1, bdt, |
539 | &sdp->sd_log_le_databuf, | |
540 | bd_le.le_list) { | |
18ec7d5c SW |
541 | /* An ordered write buffer */ |
542 | if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) { | |
543 | list_move(&bd1->bd_le.le_list, &started); | |
544 | if (bd1 == bd2) { | |
545 | bd2 = NULL; | |
568f4c96 SW |
546 | bd2 = list_prepare_entry(bd2, |
547 | &sdp->sd_log_le_databuf, | |
548 | bd_le.le_list); | |
18ec7d5c SW |
549 | } |
550 | total_dbuf--; | |
551 | if (bd1->bd_bh) { | |
552 | get_bh(bd1->bd_bh); | |
18ec7d5c | 553 | if (buffer_dirty(bd1->bd_bh)) { |
f55ab26a | 554 | gfs2_log_unlock(sdp); |
18ec7d5c | 555 | wait_on_buffer(bd1->bd_bh); |
568f4c96 SW |
556 | ll_rw_block(WRITE, 1, |
557 | &bd1->bd_bh); | |
f55ab26a | 558 | gfs2_log_lock(sdp); |
18ec7d5c SW |
559 | } |
560 | brelse(bd1->bd_bh); | |
561 | continue; | |
562 | } | |
18ec7d5c SW |
563 | continue; |
564 | } else if (bd1->bd_bh) { /* A journaled buffer */ | |
565 | int magic; | |
566 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
567 | if (!bh) { |
568 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 569 | sdp->sd_log_num_hdrs++; |
568f4c96 SW |
570 | ld = (struct gfs2_log_descriptor *) |
571 | bh->b_data; | |
18ec7d5c | 572 | ptr = (__be64 *)(bh->b_data + offset); |
568f4c96 SW |
573 | ld->ld_header.mh_magic = |
574 | cpu_to_be32(GFS2_MAGIC); | |
575 | ld->ld_header.mh_type = | |
e3167ded | 576 | cpu_to_be32(GFS2_METATYPE_LD); |
568f4c96 | 577 | ld->ld_header.mh_format = |
e3167ded | 578 | cpu_to_be32(GFS2_FORMAT_LD); |
568f4c96 SW |
579 | ld->ld_type = |
580 | cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
18ec7d5c SW |
581 | ld->ld_length = cpu_to_be32(num + 1); |
582 | ld->ld_data1 = cpu_to_be32(num); | |
583 | ld->ld_data2 = cpu_to_be32(0); | |
584 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
585 | } | |
586 | magic = gfs2_check_magic(bd1->bd_bh); | |
587 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); | |
588 | *ptr++ = cpu_to_be64((__u64)magic); | |
589 | clear_buffer_escaped(bd1->bd_bh); | |
590 | if (unlikely(magic != 0)) | |
591 | set_buffer_escaped(bd1->bd_bh); | |
f55ab26a | 592 | gfs2_log_lock(sdp); |
18ec7d5c SW |
593 | if (n++ > num) |
594 | break; | |
595 | } | |
596 | } | |
f55ab26a | 597 | gfs2_log_unlock(sdp); |
b3b94faa | 598 | if (bh) { |
18ec7d5c SW |
599 | set_buffer_dirty(bh); |
600 | ll_rw_block(WRITE, 1, &bh); | |
601 | bh = NULL; | |
602 | } | |
603 | n = 0; | |
f55ab26a | 604 | gfs2_log_lock(sdp); |
568f4c96 SW |
605 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, |
606 | bd_le.le_list) { | |
18ec7d5c SW |
607 | if (!bd2->bd_bh) |
608 | continue; | |
609 | /* copy buffer if it needs escaping */ | |
f55ab26a | 610 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
611 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
612 | void *kaddr; | |
613 | struct page *page = bd2->bd_bh->b_page; | |
614 | bh = gfs2_log_get_buf(sdp); | |
615 | kaddr = kmap_atomic(page, KM_USER0); | |
568f4c96 SW |
616 | memcpy(bh->b_data, |
617 | kaddr + bh_offset(bd2->bd_bh), | |
618 | sdp->sd_sb.sb_bsize); | |
18ec7d5c SW |
619 | kunmap_atomic(page, KM_USER0); |
620 | *(__be32 *)bh->b_data = 0; | |
621 | } else { | |
622 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 623 | } |
18ec7d5c SW |
624 | set_buffer_dirty(bh); |
625 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 626 | gfs2_log_lock(sdp); |
18ec7d5c SW |
627 | if (++n >= num) |
628 | break; | |
629 | } | |
630 | bh = NULL; | |
631 | total_dbuf -= num; | |
632 | total_jdata -= num; | |
b3b94faa | 633 | } |
f55ab26a SW |
634 | gfs2_log_unlock(sdp); |
635 | ||
18ec7d5c | 636 | /* Wait on all ordered buffers */ |
b3b94faa | 637 | while (!list_empty(&started)) { |
13538b8e | 638 | gfs2_log_lock(sdp); |
568f4c96 SW |
639 | bd1 = list_entry(started.next, struct gfs2_bufdata, |
640 | bd_le.le_list); | |
08867605 | 641 | list_del_init(&bd1->bd_le.le_list); |
b3b94faa | 642 | sdp->sd_log_num_databuf--; |
18ec7d5c | 643 | bh = bd1->bd_bh; |
b3b94faa | 644 | if (bh) { |
5c676f6d | 645 | bh->b_private = NULL; |
15d00c0b | 646 | get_bh(bh); |
b3b94faa DT |
647 | gfs2_log_unlock(sdp); |
648 | wait_on_buffer(bh); | |
649 | brelse(bh); | |
650 | } else | |
651 | gfs2_log_unlock(sdp); | |
652 | ||
3a8476dd | 653 | kmem_cache_free(gfs2_bufdata_cachep, bd1); |
b3b94faa DT |
654 | } |
655 | ||
18ec7d5c SW |
656 | /* We've removed all the ordered write bufs here, so only jdata left */ |
657 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); | |
658 | } | |
659 | ||
660 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
661 | struct gfs2_log_descriptor *ld, | |
662 | __be64 *ptr, int pass) | |
663 | { | |
feaa7bba SW |
664 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
665 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 666 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
667 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
668 | struct buffer_head *bh_log, *bh_ip; | |
669 | uint64_t blkno; | |
670 | uint64_t esc; | |
671 | int error = 0; | |
672 | ||
673 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
674 | return 0; | |
675 | ||
676 | gfs2_replay_incr_blk(sdp, &start); | |
677 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
678 | blkno = be64_to_cpu(*ptr++); | |
679 | esc = be64_to_cpu(*ptr++); | |
680 | ||
681 | sdp->sd_found_blocks++; | |
682 | ||
683 | if (gfs2_revoke_check(sdp, blkno, start)) | |
684 | continue; | |
685 | ||
686 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
687 | if (error) | |
688 | return error; | |
689 | ||
690 | bh_ip = gfs2_meta_new(gl, blkno); | |
691 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
692 | ||
693 | /* Unescape */ | |
694 | if (esc) { | |
695 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
696 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
697 | } | |
698 | mark_buffer_dirty(bh_ip); | |
699 | ||
700 | brelse(bh_log); | |
701 | brelse(bh_ip); | |
702 | if (error) | |
703 | break; | |
704 | ||
705 | sdp->sd_replayed_blocks++; | |
706 | } | |
707 | ||
708 | return error; | |
709 | } | |
710 | ||
711 | /* FIXME: sort out accounting for log blocks etc. */ | |
712 | ||
713 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
714 | { | |
feaa7bba SW |
715 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
716 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
717 | |
718 | if (error) { | |
5c676f6d | 719 | gfs2_meta_sync(ip->i_gl, |
568f4c96 | 720 | DIO_START | DIO_WAIT); |
18ec7d5c SW |
721 | return; |
722 | } | |
723 | if (pass != 1) | |
724 | return; | |
725 | ||
726 | /* data sync? */ | |
5c676f6d | 727 | gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT); |
18ec7d5c SW |
728 | |
729 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
730 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
731 | } | |
732 | ||
733 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
734 | { | |
735 | struct list_head *head = &sdp->sd_log_le_databuf; | |
736 | struct gfs2_bufdata *bd; | |
737 | ||
738 | while (!list_empty(head)) { | |
739 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
f55ab26a | 740 | list_del(&bd->bd_le.le_list); |
18ec7d5c SW |
741 | sdp->sd_log_num_databuf--; |
742 | sdp->sd_log_num_jdata--; | |
743 | gfs2_unpin(sdp, bd->bd_bh, ai); | |
18ec7d5c | 744 | } |
b3b94faa | 745 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
18ec7d5c | 746 | gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
747 | } |
748 | ||
18ec7d5c | 749 | |
b09e593d | 750 | const struct gfs2_log_operations gfs2_glock_lops = { |
b3b94faa DT |
751 | .lo_add = glock_lo_add, |
752 | .lo_after_commit = glock_lo_after_commit, | |
753 | .lo_name = "glock" | |
754 | }; | |
755 | ||
b09e593d | 756 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
757 | .lo_add = buf_lo_add, |
758 | .lo_incore_commit = buf_lo_incore_commit, | |
759 | .lo_before_commit = buf_lo_before_commit, | |
760 | .lo_after_commit = buf_lo_after_commit, | |
761 | .lo_before_scan = buf_lo_before_scan, | |
762 | .lo_scan_elements = buf_lo_scan_elements, | |
763 | .lo_after_scan = buf_lo_after_scan, | |
764 | .lo_name = "buf" | |
765 | }; | |
766 | ||
b09e593d | 767 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
768 | .lo_add = revoke_lo_add, |
769 | .lo_before_commit = revoke_lo_before_commit, | |
770 | .lo_before_scan = revoke_lo_before_scan, | |
771 | .lo_scan_elements = revoke_lo_scan_elements, | |
772 | .lo_after_scan = revoke_lo_after_scan, | |
773 | .lo_name = "revoke" | |
774 | }; | |
775 | ||
b09e593d | 776 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
777 | .lo_add = rg_lo_add, |
778 | .lo_after_commit = rg_lo_after_commit, | |
779 | .lo_name = "rg" | |
780 | }; | |
781 | ||
b09e593d | 782 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 783 | .lo_add = databuf_lo_add, |
18ec7d5c | 784 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 785 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
786 | .lo_after_commit = databuf_lo_after_commit, |
787 | .lo_scan_elements = databuf_lo_scan_elements, | |
788 | .lo_after_scan = databuf_lo_after_scan, | |
b3b94faa DT |
789 | .lo_name = "databuf" |
790 | }; | |
791 | ||
b09e593d | 792 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
b3b94faa DT |
793 | &gfs2_glock_lops, |
794 | &gfs2_buf_lops, | |
795 | &gfs2_revoke_lops, | |
796 | &gfs2_rg_lops, | |
797 | &gfs2_databuf_lops, | |
798 | NULL | |
799 | }; | |
800 |