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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
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> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
16 | #include <asm/semaphore.h> |
17 | ||
18 | #include "gfs2.h" | |
5c676f6d SW |
19 | #include "lm_interface.h" |
20 | #include "incore.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 DT |
29 | |
30 | static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
31 | { | |
32 | struct gfs2_glock *gl; | |
5c676f6d | 33 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 34 | |
5c676f6d | 35 | tr->tr_touched = 1; |
b3b94faa DT |
36 | |
37 | if (!list_empty(&le->le_list)) | |
38 | return; | |
39 | ||
40 | gl = container_of(le, struct gfs2_glock, gl_le); | |
41 | if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) | |
42 | return; | |
43 | gfs2_glock_hold(gl); | |
44 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
45 | ||
46 | gfs2_log_lock(sdp); | |
47 | sdp->sd_log_num_gl++; | |
48 | list_add(&le->le_list, &sdp->sd_log_le_gl); | |
49 | gfs2_log_unlock(sdp); | |
50 | } | |
51 | ||
52 | static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
53 | { | |
54 | struct list_head *head = &sdp->sd_log_le_gl; | |
55 | struct gfs2_glock *gl; | |
56 | ||
57 | while (!list_empty(head)) { | |
58 | gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); | |
59 | list_del_init(&gl->gl_le.le_list); | |
60 | sdp->sd_log_num_gl--; | |
61 | ||
62 | gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); | |
63 | gfs2_glock_put(gl); | |
64 | } | |
65 | gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); | |
66 | } | |
67 | ||
68 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
69 | { | |
70 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
71 | struct gfs2_trans *tr; | |
72 | ||
73 | if (!list_empty(&bd->bd_list_tr)) | |
74 | return; | |
75 | ||
5c676f6d | 76 | tr = current->journal_info; |
b3b94faa DT |
77 | tr->tr_touched = 1; |
78 | tr->tr_num_buf++; | |
79 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
80 | ||
81 | if (!list_empty(&le->le_list)) | |
82 | return; | |
83 | ||
84 | gfs2_trans_add_gl(bd->bd_gl); | |
85 | ||
86 | gfs2_meta_check(sdp, bd->bd_bh); | |
a98ab220 | 87 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
88 | |
89 | gfs2_log_lock(sdp); | |
90 | sdp->sd_log_num_buf++; | |
91 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
92 | gfs2_log_unlock(sdp); | |
93 | ||
94 | tr->tr_num_buf_new++; | |
95 | } | |
96 | ||
97 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
98 | { | |
99 | struct list_head *head = &tr->tr_list_buf; | |
100 | struct gfs2_bufdata *bd; | |
101 | ||
102 | while (!list_empty(head)) { | |
103 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
104 | list_del_init(&bd->bd_list_tr); | |
105 | tr->tr_num_buf--; | |
106 | } | |
107 | gfs2_assert_warn(sdp, !tr->tr_num_buf); | |
108 | } | |
109 | ||
110 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
111 | { | |
112 | struct buffer_head *bh; | |
113 | struct gfs2_log_descriptor *ld; | |
114 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
115 | unsigned int total = sdp->sd_log_num_buf; | |
116 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
117 | unsigned int limit; | |
118 | unsigned int num; | |
119 | unsigned n; | |
120 | __be64 *ptr; | |
121 | ||
122 | offset += (sizeof(__be64) - 1); | |
123 | offset &= ~(sizeof(__be64) - 1); | |
124 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
125 | /* for 4k blocks, limit = 503 */ | |
126 | ||
127 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); | |
128 | while(total) { | |
129 | num = total; | |
130 | if (total > limit) | |
131 | num = limit; | |
132 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 133 | sdp->sd_log_num_hdrs++; |
b3b94faa DT |
134 | ld = (struct gfs2_log_descriptor *)bh->b_data; |
135 | ptr = (__be64 *)(bh->b_data + offset); | |
136 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
137 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
138 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa DT |
139 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
140 | ld->ld_length = cpu_to_be32(num + 1); | |
141 | ld->ld_data1 = cpu_to_be32(num); | |
142 | ld->ld_data2 = cpu_to_be32(0); | |
143 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
144 | ||
145 | n = 0; | |
568f4c96 SW |
146 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
147 | bd_le.le_list) { | |
b3b94faa DT |
148 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
149 | if (++n >= num) | |
150 | break; | |
151 | } | |
152 | ||
153 | set_buffer_dirty(bh); | |
154 | ll_rw_block(WRITE, 1, &bh); | |
155 | ||
156 | n = 0; | |
568f4c96 SW |
157 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
158 | bd_le.le_list) { | |
b3b94faa DT |
159 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
160 | set_buffer_dirty(bh); | |
161 | ll_rw_block(WRITE, 1, &bh); | |
162 | if (++n >= num) | |
163 | break; | |
164 | } | |
165 | ||
166 | total -= num; | |
167 | } | |
168 | } | |
169 | ||
170 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
171 | { | |
172 | struct list_head *head = &sdp->sd_log_le_buf; | |
173 | struct gfs2_bufdata *bd; | |
174 | ||
175 | while (!list_empty(head)) { | |
176 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
177 | list_del_init(&bd->bd_le.le_list); | |
178 | sdp->sd_log_num_buf--; | |
179 | ||
a98ab220 | 180 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
181 | } |
182 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
183 | } | |
184 | ||
185 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
186 | struct gfs2_log_header *head, int pass) | |
187 | { | |
5c676f6d SW |
188 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
189 | struct gfs2_sbd *sdp = ip->i_sbd; | |
b3b94faa DT |
190 | |
191 | if (pass != 0) | |
192 | return; | |
193 | ||
194 | sdp->sd_found_blocks = 0; | |
195 | sdp->sd_replayed_blocks = 0; | |
196 | } | |
197 | ||
198 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
199 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
200 | int pass) | |
201 | { | |
5c676f6d SW |
202 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
203 | struct gfs2_sbd *sdp = ip->i_sbd; | |
204 | struct gfs2_glock *gl = ip->i_gl; | |
b3b94faa DT |
205 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
206 | struct buffer_head *bh_log, *bh_ip; | |
207 | uint64_t blkno; | |
208 | int error = 0; | |
209 | ||
210 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
211 | return 0; | |
212 | ||
213 | gfs2_replay_incr_blk(sdp, &start); | |
214 | ||
215 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
216 | blkno = be64_to_cpu(*ptr++); | |
217 | ||
218 | sdp->sd_found_blocks++; | |
219 | ||
220 | if (gfs2_revoke_check(sdp, blkno, start)) | |
221 | continue; | |
222 | ||
223 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
224 | if (error) | |
225 | return error; | |
226 | ||
227 | bh_ip = gfs2_meta_new(gl, blkno); | |
228 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
229 | ||
230 | if (gfs2_meta_check(sdp, bh_ip)) | |
231 | error = -EIO; | |
232 | else | |
233 | mark_buffer_dirty(bh_ip); | |
234 | ||
235 | brelse(bh_log); | |
236 | brelse(bh_ip); | |
237 | ||
238 | if (error) | |
239 | break; | |
240 | ||
241 | sdp->sd_replayed_blocks++; | |
242 | } | |
243 | ||
244 | return error; | |
245 | } | |
246 | ||
247 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
248 | { | |
5c676f6d SW |
249 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
250 | struct gfs2_sbd *sdp = ip->i_sbd; | |
b3b94faa DT |
251 | |
252 | if (error) { | |
5c676f6d | 253 | gfs2_meta_sync(ip->i_gl, |
568f4c96 | 254 | DIO_START | DIO_WAIT); |
b3b94faa DT |
255 | return; |
256 | } | |
257 | if (pass != 1) | |
258 | return; | |
259 | ||
5c676f6d | 260 | gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT); |
b3b94faa DT |
261 | |
262 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
263 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
264 | } | |
265 | ||
266 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
267 | { | |
268 | struct gfs2_trans *tr; | |
269 | ||
5c676f6d | 270 | tr = current->journal_info; |
b3b94faa DT |
271 | tr->tr_touched = 1; |
272 | tr->tr_num_revoke++; | |
273 | ||
274 | gfs2_log_lock(sdp); | |
275 | sdp->sd_log_num_revoke++; | |
276 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
277 | gfs2_log_unlock(sdp); | |
278 | } | |
279 | ||
280 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
281 | { | |
282 | struct gfs2_log_descriptor *ld; | |
283 | struct gfs2_meta_header *mh; | |
284 | struct buffer_head *bh; | |
285 | unsigned int offset; | |
286 | struct list_head *head = &sdp->sd_log_le_revoke; | |
287 | struct gfs2_revoke *rv; | |
288 | ||
289 | if (!sdp->sd_log_num_revoke) | |
290 | return; | |
291 | ||
292 | bh = gfs2_log_get_buf(sdp); | |
293 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
294 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
295 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
296 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa | 297 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); |
568f4c96 SW |
298 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
299 | sizeof(uint64_t))); | |
b3b94faa DT |
300 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
301 | ld->ld_data2 = cpu_to_be32(0); | |
302 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
303 | offset = sizeof(struct gfs2_log_descriptor); | |
304 | ||
305 | while (!list_empty(head)) { | |
306 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 307 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
308 | sdp->sd_log_num_revoke--; |
309 | ||
310 | if (offset + sizeof(uint64_t) > sdp->sd_sb.sb_bsize) { | |
311 | set_buffer_dirty(bh); | |
312 | ll_rw_block(WRITE, 1, &bh); | |
313 | ||
314 | bh = gfs2_log_get_buf(sdp); | |
315 | mh = (struct gfs2_meta_header *)bh->b_data; | |
316 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
317 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
318 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
319 | offset = sizeof(struct gfs2_meta_header); |
320 | } | |
321 | ||
322 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
323 | kfree(rv); | |
324 | ||
325 | offset += sizeof(uint64_t); | |
326 | } | |
327 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
328 | ||
329 | set_buffer_dirty(bh); | |
330 | ll_rw_block(WRITE, 1, &bh); | |
331 | } | |
332 | ||
333 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
334 | struct gfs2_log_header *head, int pass) | |
335 | { | |
5c676f6d SW |
336 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
337 | struct gfs2_sbd *sdp = ip->i_sbd; | |
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 | { | |
5c676f6d SW |
350 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
351 | struct gfs2_sbd *sdp = ip->i_sbd; | |
b3b94faa DT |
352 | unsigned int blks = be32_to_cpu(ld->ld_length); |
353 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
354 | struct buffer_head *bh; | |
355 | unsigned int offset; | |
356 | uint64_t blkno; | |
357 | int first = 1; | |
358 | int error; | |
359 | ||
360 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
361 | return 0; | |
362 | ||
363 | offset = sizeof(struct gfs2_log_descriptor); | |
364 | ||
365 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
366 | error = gfs2_replay_read_block(jd, start, &bh); | |
367 | if (error) | |
368 | return error; | |
369 | ||
370 | if (!first) | |
371 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
372 | ||
373 | while (offset + sizeof(uint64_t) <= sdp->sd_sb.sb_bsize) { | |
374 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); | |
375 | ||
376 | error = gfs2_revoke_add(sdp, blkno, start); | |
377 | if (error < 0) | |
378 | return error; | |
379 | else if (error) | |
380 | sdp->sd_found_revokes++; | |
381 | ||
382 | if (!--revokes) | |
383 | break; | |
384 | offset += sizeof(uint64_t); | |
385 | } | |
386 | ||
387 | brelse(bh); | |
388 | offset = sizeof(struct gfs2_meta_header); | |
389 | first = 0; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
396 | { | |
5c676f6d SW |
397 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
398 | struct gfs2_sbd *sdp = ip->i_sbd; | |
b3b94faa DT |
399 | |
400 | if (error) { | |
401 | gfs2_revoke_clean(sdp); | |
402 | return; | |
403 | } | |
404 | if (pass != 1) | |
405 | return; | |
406 | ||
407 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
408 | jd->jd_jid, sdp->sd_found_revokes); | |
409 | ||
410 | gfs2_revoke_clean(sdp); | |
411 | } | |
412 | ||
413 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
414 | { | |
415 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 416 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 417 | |
5c676f6d | 418 | tr->tr_touched = 1; |
b3b94faa DT |
419 | |
420 | if (!list_empty(&le->le_list)) | |
421 | return; | |
422 | ||
423 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); | |
424 | gfs2_rgrp_bh_hold(rgd); | |
425 | ||
426 | gfs2_log_lock(sdp); | |
427 | sdp->sd_log_num_rg++; | |
428 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
429 | gfs2_log_unlock(sdp); | |
430 | } | |
431 | ||
432 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
433 | { | |
434 | struct list_head *head = &sdp->sd_log_le_rg; | |
435 | struct gfs2_rgrpd *rgd; | |
436 | ||
437 | while (!list_empty(head)) { | |
438 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
439 | list_del_init(&rgd->rd_le.le_list); | |
440 | sdp->sd_log_num_rg--; | |
441 | ||
442 | gfs2_rgrp_repolish_clones(rgd); | |
443 | gfs2_rgrp_bh_put(rgd); | |
444 | } | |
445 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
446 | } | |
447 | ||
18ec7d5c SW |
448 | /** |
449 | * databuf_lo_add - Add a databuf to the transaction. | |
450 | * | |
451 | * This is used in two distinct cases: | |
452 | * i) In ordered write mode | |
453 | * We put the data buffer on a list so that we can ensure that its | |
454 | * synced to disk at the right time | |
455 | * ii) In journaled data mode | |
456 | * We need to journal the data block in the same way as metadata in | |
457 | * the functions above. The difference is that here we have a tag | |
458 | * which is two __be64's being the block number (as per meta data) | |
459 | * and a flag which says whether the data block needs escaping or | |
460 | * not. This means we need a new log entry for each 251 or so data | |
461 | * blocks, which isn't an enormous overhead but twice as much as | |
462 | * for normal metadata blocks. | |
463 | */ | |
b3b94faa DT |
464 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
465 | { | |
18ec7d5c | 466 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 467 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 468 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
5c676f6d | 469 | struct gfs2_inode *ip = mapping->host->u.generic_ip; |
b3b94faa | 470 | |
18ec7d5c SW |
471 | tr->tr_touched = 1; |
472 | if (!list_empty(&bd->bd_list_tr) && | |
473 | (ip->i_di.di_flags & GFS2_DIF_JDATA)) { | |
474 | tr->tr_num_buf++; | |
475 | gfs2_trans_add_gl(bd->bd_gl); | |
476 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
477 | gfs2_pin(sdp, bd->bd_bh); | |
b4dc7291 | 478 | tr->tr_num_buf_new++; |
18ec7d5c | 479 | } |
b3b94faa | 480 | gfs2_log_lock(sdp); |
13538b8e SW |
481 | if (!list_empty(&le->le_list)) { |
482 | if (ip->i_di.di_flags & GFS2_DIF_JDATA) | |
483 | sdp->sd_log_num_jdata++; | |
484 | sdp->sd_log_num_databuf++; | |
485 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
486 | } | |
b3b94faa DT |
487 | gfs2_log_unlock(sdp); |
488 | } | |
489 | ||
18ec7d5c SW |
490 | static int gfs2_check_magic(struct buffer_head *bh) |
491 | { | |
492 | struct page *page = bh->b_page; | |
493 | void *kaddr; | |
494 | __be32 *ptr; | |
495 | int rv = 0; | |
496 | ||
497 | kaddr = kmap_atomic(page, KM_USER0); | |
498 | ptr = kaddr + bh_offset(bh); | |
499 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
500 | rv = 1; | |
501 | kunmap_atomic(page, KM_USER0); | |
502 | ||
503 | return rv; | |
504 | } | |
505 | ||
506 | /** | |
507 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
508 | * | |
509 | * Here we scan through the lists of buffers and make the assumption | |
510 | * that any buffer thats been pinned is being journaled, and that | |
511 | * any unpinned buffer is an ordered write data buffer and therefore | |
512 | * will be written back rather than journaled. | |
513 | */ | |
b3b94faa DT |
514 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
515 | { | |
b3b94faa | 516 | LIST_HEAD(started); |
18ec7d5c SW |
517 | struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
518 | struct buffer_head *bh = NULL; | |
519 | unsigned int offset = sizeof(struct gfs2_log_descriptor); | |
520 | struct gfs2_log_descriptor *ld; | |
521 | unsigned int limit; | |
522 | unsigned int total_dbuf = sdp->sd_log_num_databuf; | |
523 | unsigned int total_jdata = sdp->sd_log_num_jdata; | |
524 | unsigned int num, n; | |
f55ab26a | 525 | __be64 *ptr = NULL; |
b3b94faa | 526 | |
18ec7d5c SW |
527 | offset += (2*sizeof(__be64) - 1); |
528 | offset &= ~(2*sizeof(__be64) - 1); | |
529 | limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); | |
b3b94faa | 530 | |
18ec7d5c SW |
531 | /* |
532 | * Start writing ordered buffers, write journaled buffers | |
533 | * into the log along with a header | |
534 | */ | |
f55ab26a | 535 | gfs2_log_lock(sdp); |
568f4c96 SW |
536 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, |
537 | bd_le.le_list); | |
18ec7d5c SW |
538 | while(total_dbuf) { |
539 | num = total_jdata; | |
540 | if (num > limit) | |
541 | num = limit; | |
542 | n = 0; | |
568f4c96 SW |
543 | list_for_each_entry_safe_continue(bd1, bdt, |
544 | &sdp->sd_log_le_databuf, | |
545 | bd_le.le_list) { | |
18ec7d5c SW |
546 | /* An ordered write buffer */ |
547 | if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) { | |
548 | list_move(&bd1->bd_le.le_list, &started); | |
549 | if (bd1 == bd2) { | |
550 | bd2 = NULL; | |
568f4c96 SW |
551 | bd2 = list_prepare_entry(bd2, |
552 | &sdp->sd_log_le_databuf, | |
553 | bd_le.le_list); | |
18ec7d5c SW |
554 | } |
555 | total_dbuf--; | |
556 | if (bd1->bd_bh) { | |
557 | get_bh(bd1->bd_bh); | |
18ec7d5c | 558 | if (buffer_dirty(bd1->bd_bh)) { |
f55ab26a | 559 | gfs2_log_unlock(sdp); |
18ec7d5c | 560 | wait_on_buffer(bd1->bd_bh); |
568f4c96 SW |
561 | ll_rw_block(WRITE, 1, |
562 | &bd1->bd_bh); | |
f55ab26a | 563 | gfs2_log_lock(sdp); |
18ec7d5c SW |
564 | } |
565 | brelse(bd1->bd_bh); | |
566 | continue; | |
567 | } | |
18ec7d5c SW |
568 | continue; |
569 | } else if (bd1->bd_bh) { /* A journaled buffer */ | |
570 | int magic; | |
571 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
572 | if (!bh) { |
573 | bh = gfs2_log_get_buf(sdp); | |
b09e593d | 574 | sdp->sd_log_num_hdrs++; |
568f4c96 SW |
575 | ld = (struct gfs2_log_descriptor *) |
576 | bh->b_data; | |
18ec7d5c | 577 | ptr = (__be64 *)(bh->b_data + offset); |
568f4c96 SW |
578 | ld->ld_header.mh_magic = |
579 | cpu_to_be32(GFS2_MAGIC); | |
580 | ld->ld_header.mh_type = | |
e3167ded | 581 | cpu_to_be32(GFS2_METATYPE_LD); |
568f4c96 | 582 | ld->ld_header.mh_format = |
e3167ded | 583 | cpu_to_be32(GFS2_FORMAT_LD); |
568f4c96 SW |
584 | ld->ld_type = |
585 | cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
18ec7d5c SW |
586 | ld->ld_length = cpu_to_be32(num + 1); |
587 | ld->ld_data1 = cpu_to_be32(num); | |
588 | ld->ld_data2 = cpu_to_be32(0); | |
589 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
590 | } | |
591 | magic = gfs2_check_magic(bd1->bd_bh); | |
592 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); | |
593 | *ptr++ = cpu_to_be64((__u64)magic); | |
594 | clear_buffer_escaped(bd1->bd_bh); | |
595 | if (unlikely(magic != 0)) | |
596 | set_buffer_escaped(bd1->bd_bh); | |
f55ab26a | 597 | gfs2_log_lock(sdp); |
18ec7d5c SW |
598 | if (n++ > num) |
599 | break; | |
600 | } | |
601 | } | |
f55ab26a | 602 | gfs2_log_unlock(sdp); |
b3b94faa | 603 | if (bh) { |
18ec7d5c SW |
604 | set_buffer_dirty(bh); |
605 | ll_rw_block(WRITE, 1, &bh); | |
606 | bh = NULL; | |
607 | } | |
608 | n = 0; | |
f55ab26a | 609 | gfs2_log_lock(sdp); |
568f4c96 SW |
610 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, |
611 | bd_le.le_list) { | |
18ec7d5c SW |
612 | if (!bd2->bd_bh) |
613 | continue; | |
614 | /* copy buffer if it needs escaping */ | |
f55ab26a | 615 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
616 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
617 | void *kaddr; | |
618 | struct page *page = bd2->bd_bh->b_page; | |
619 | bh = gfs2_log_get_buf(sdp); | |
620 | kaddr = kmap_atomic(page, KM_USER0); | |
568f4c96 SW |
621 | memcpy(bh->b_data, |
622 | kaddr + bh_offset(bd2->bd_bh), | |
623 | sdp->sd_sb.sb_bsize); | |
18ec7d5c SW |
624 | kunmap_atomic(page, KM_USER0); |
625 | *(__be32 *)bh->b_data = 0; | |
626 | } else { | |
627 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 628 | } |
18ec7d5c SW |
629 | set_buffer_dirty(bh); |
630 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 631 | gfs2_log_lock(sdp); |
18ec7d5c SW |
632 | if (++n >= num) |
633 | break; | |
634 | } | |
635 | bh = NULL; | |
636 | total_dbuf -= num; | |
637 | total_jdata -= num; | |
b3b94faa | 638 | } |
f55ab26a SW |
639 | gfs2_log_unlock(sdp); |
640 | ||
18ec7d5c | 641 | /* Wait on all ordered buffers */ |
b3b94faa | 642 | while (!list_empty(&started)) { |
13538b8e | 643 | gfs2_log_lock(sdp); |
568f4c96 SW |
644 | bd1 = list_entry(started.next, struct gfs2_bufdata, |
645 | bd_le.le_list); | |
18ec7d5c | 646 | list_del(&bd1->bd_le.le_list); |
b3b94faa DT |
647 | sdp->sd_log_num_databuf--; |
648 | ||
18ec7d5c | 649 | bh = bd1->bd_bh; |
b3b94faa | 650 | if (bh) { |
5c676f6d | 651 | bh->b_private = NULL; |
b3b94faa DT |
652 | gfs2_log_unlock(sdp); |
653 | wait_on_buffer(bh); | |
654 | brelse(bh); | |
655 | } else | |
656 | gfs2_log_unlock(sdp); | |
657 | ||
18ec7d5c | 658 | kfree(bd1); |
b3b94faa DT |
659 | } |
660 | ||
18ec7d5c SW |
661 | /* We've removed all the ordered write bufs here, so only jdata left */ |
662 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); | |
663 | } | |
664 | ||
665 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
666 | struct gfs2_log_descriptor *ld, | |
667 | __be64 *ptr, int pass) | |
668 | { | |
5c676f6d SW |
669 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
670 | struct gfs2_sbd *sdp = ip->i_sbd; | |
671 | struct gfs2_glock *gl = ip->i_gl; | |
18ec7d5c SW |
672 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
673 | struct buffer_head *bh_log, *bh_ip; | |
674 | uint64_t blkno; | |
675 | uint64_t esc; | |
676 | int error = 0; | |
677 | ||
678 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
679 | return 0; | |
680 | ||
681 | gfs2_replay_incr_blk(sdp, &start); | |
682 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
683 | blkno = be64_to_cpu(*ptr++); | |
684 | esc = be64_to_cpu(*ptr++); | |
685 | ||
686 | sdp->sd_found_blocks++; | |
687 | ||
688 | if (gfs2_revoke_check(sdp, blkno, start)) | |
689 | continue; | |
690 | ||
691 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
692 | if (error) | |
693 | return error; | |
694 | ||
695 | bh_ip = gfs2_meta_new(gl, blkno); | |
696 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
697 | ||
698 | /* Unescape */ | |
699 | if (esc) { | |
700 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
701 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
702 | } | |
703 | mark_buffer_dirty(bh_ip); | |
704 | ||
705 | brelse(bh_log); | |
706 | brelse(bh_ip); | |
707 | if (error) | |
708 | break; | |
709 | ||
710 | sdp->sd_replayed_blocks++; | |
711 | } | |
712 | ||
713 | return error; | |
714 | } | |
715 | ||
716 | /* FIXME: sort out accounting for log blocks etc. */ | |
717 | ||
718 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
719 | { | |
5c676f6d SW |
720 | struct gfs2_inode *ip = jd->jd_inode->u.generic_ip; |
721 | struct gfs2_sbd *sdp = ip->i_sbd; | |
18ec7d5c SW |
722 | |
723 | if (error) { | |
5c676f6d | 724 | gfs2_meta_sync(ip->i_gl, |
568f4c96 | 725 | DIO_START | DIO_WAIT); |
18ec7d5c SW |
726 | return; |
727 | } | |
728 | if (pass != 1) | |
729 | return; | |
730 | ||
731 | /* data sync? */ | |
5c676f6d | 732 | gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT); |
18ec7d5c SW |
733 | |
734 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
735 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
736 | } | |
737 | ||
738 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
739 | { | |
740 | struct list_head *head = &sdp->sd_log_le_databuf; | |
741 | struct gfs2_bufdata *bd; | |
742 | ||
743 | while (!list_empty(head)) { | |
744 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
f55ab26a | 745 | list_del(&bd->bd_le.le_list); |
18ec7d5c SW |
746 | sdp->sd_log_num_databuf--; |
747 | sdp->sd_log_num_jdata--; | |
748 | gfs2_unpin(sdp, bd->bd_bh, ai); | |
18ec7d5c | 749 | } |
b3b94faa | 750 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
18ec7d5c | 751 | gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
752 | } |
753 | ||
18ec7d5c | 754 | |
b09e593d | 755 | const struct gfs2_log_operations gfs2_glock_lops = { |
b3b94faa DT |
756 | .lo_add = glock_lo_add, |
757 | .lo_after_commit = glock_lo_after_commit, | |
758 | .lo_name = "glock" | |
759 | }; | |
760 | ||
b09e593d | 761 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
762 | .lo_add = buf_lo_add, |
763 | .lo_incore_commit = buf_lo_incore_commit, | |
764 | .lo_before_commit = buf_lo_before_commit, | |
765 | .lo_after_commit = buf_lo_after_commit, | |
766 | .lo_before_scan = buf_lo_before_scan, | |
767 | .lo_scan_elements = buf_lo_scan_elements, | |
768 | .lo_after_scan = buf_lo_after_scan, | |
769 | .lo_name = "buf" | |
770 | }; | |
771 | ||
b09e593d | 772 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
773 | .lo_add = revoke_lo_add, |
774 | .lo_before_commit = revoke_lo_before_commit, | |
775 | .lo_before_scan = revoke_lo_before_scan, | |
776 | .lo_scan_elements = revoke_lo_scan_elements, | |
777 | .lo_after_scan = revoke_lo_after_scan, | |
778 | .lo_name = "revoke" | |
779 | }; | |
780 | ||
b09e593d | 781 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
782 | .lo_add = rg_lo_add, |
783 | .lo_after_commit = rg_lo_after_commit, | |
784 | .lo_name = "rg" | |
785 | }; | |
786 | ||
b09e593d | 787 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 788 | .lo_add = databuf_lo_add, |
18ec7d5c | 789 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 790 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
791 | .lo_after_commit = databuf_lo_after_commit, |
792 | .lo_scan_elements = databuf_lo_scan_elements, | |
793 | .lo_after_scan = databuf_lo_after_scan, | |
b3b94faa DT |
794 | .lo_name = "databuf" |
795 | }; | |
796 | ||
b09e593d | 797 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
b3b94faa DT |
798 | &gfs2_glock_lops, |
799 | &gfs2_buf_lops, | |
800 | &gfs2_revoke_lops, | |
801 | &gfs2_rg_lops, | |
802 | &gfs2_databuf_lops, | |
803 | NULL | |
804 | }; | |
805 |