aboutsummaryrefslogtreecommitdiffstats
path: root/fs/gfs2/lops.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/gfs2/lops.c')
-rw-r--r--fs/gfs2/lops.c800
1 files changed, 800 insertions, 0 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
new file mode 100644
index 000000000000..93563e72ae49
--- /dev/null
+++ b/fs/gfs2/lops.c
@@ -0,0 +1,800 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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 <linux/gfs2_ondisk.h>
16
17#include "gfs2.h"
18#include "lm_interface.h"
19#include "incore.h"
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"
27#include "util.h"
28
29static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
30{
31 struct gfs2_glock *gl;
32 struct gfs2_trans *tr = current->journal_info;
33
34 tr->tr_touched = 1;
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
51static 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
67static 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
75 tr = current->journal_info;
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);
86 gfs2_pin(sdp, bd->bd_bh);
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
96static 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
109static 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);
132 sdp->sd_log_num_hdrs++;
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);
136 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
137 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
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;
145 list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
146 bd_le.le_list) {
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;
156 list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
157 bd_le.le_list) {
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
169static 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
179 gfs2_unpin(sdp, bd->bd_bh, ai);
180 }
181 gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
182}
183
184static void buf_lo_before_scan(struct gfs2_jdesc *jd,
185 struct gfs2_log_header *head, int pass)
186{
187 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
188
189 if (pass != 0)
190 return;
191
192 sdp->sd_found_blocks = 0;
193 sdp->sd_replayed_blocks = 0;
194}
195
196static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
197 struct gfs2_log_descriptor *ld, __be64 *ptr,
198 int pass)
199{
200 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
201 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
202 struct gfs2_glock *gl = ip->i_gl;
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
245static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
246{
247 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
248 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
249
250 if (error) {
251 gfs2_meta_sync(ip->i_gl,
252 DIO_START | DIO_WAIT);
253 return;
254 }
255 if (pass != 1)
256 return;
257
258 gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT);
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
264static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
265{
266 struct gfs2_trans *tr;
267
268 tr = current->journal_info;
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
278static 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);
293 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
294 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
295 ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE);
296 ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
297 sizeof(uint64_t)));
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);
305 list_del_init(&rv->rv_le.le_list);
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);
315 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
316 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
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
331static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
332 struct gfs2_log_header *head, int pass)
333{
334 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
335
336 if (pass != 0)
337 return;
338
339 sdp->sd_found_revokes = 0;
340 sdp->sd_replay_tail = head->lh_tail;
341}
342
343static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
344 struct gfs2_log_descriptor *ld, __be64 *ptr,
345 int pass)
346{
347 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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
391static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
392{
393 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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
408static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
409{
410 struct gfs2_rgrpd *rgd;
411 struct gfs2_trans *tr = current->journal_info;
412
413 tr->tr_touched = 1;
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
427static 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
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 */
459static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
460{
461 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
462 struct gfs2_trans *tr = current->journal_info;
463 struct address_space *mapping = bd->bd_bh->b_page->mapping;
464 struct gfs2_inode *ip = GFS2_I(mapping->host);
465
466 tr->tr_touched = 1;
467 if (!list_empty(&bd->bd_list_tr) &&
468 (ip->i_di.di_flags & GFS2_DIF_JDATA)) {
469 tr->tr_num_buf++;
470 gfs2_trans_add_gl(bd->bd_gl);
471 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
472 gfs2_pin(sdp, bd->bd_bh);
473 tr->tr_num_buf_new++;
474 }
475 gfs2_log_lock(sdp);
476 if (!list_empty(&le->le_list)) {
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 }
482 gfs2_log_unlock(sdp);
483}
484
485static 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 */
509static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
510{
511 LIST_HEAD(started);
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;
520 __be64 *ptr = NULL;
521
522 offset += (2*sizeof(__be64) - 1);
523 offset &= ~(2*sizeof(__be64) - 1);
524 limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
525
526 /*
527 * Start writing ordered buffers, write journaled buffers
528 * into the log along with a header
529 */
530 gfs2_log_lock(sdp);
531 bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf,
532 bd_le.le_list);
533 while(total_dbuf) {
534 num = total_jdata;
535 if (num > limit)
536 num = limit;
537 n = 0;
538 list_for_each_entry_safe_continue(bd1, bdt,
539 &sdp->sd_log_le_databuf,
540 bd_le.le_list) {
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;
546 bd2 = list_prepare_entry(bd2,
547 &sdp->sd_log_le_databuf,
548 bd_le.le_list);
549 }
550 total_dbuf--;
551 if (bd1->bd_bh) {
552 get_bh(bd1->bd_bh);
553 if (buffer_dirty(bd1->bd_bh)) {
554 gfs2_log_unlock(sdp);
555 wait_on_buffer(bd1->bd_bh);
556 ll_rw_block(WRITE, 1,
557 &bd1->bd_bh);
558 gfs2_log_lock(sdp);
559 }
560 brelse(bd1->bd_bh);
561 continue;
562 }
563 continue;
564 } else if (bd1->bd_bh) { /* A journaled buffer */
565 int magic;
566 gfs2_log_unlock(sdp);
567 if (!bh) {
568 bh = gfs2_log_get_buf(sdp);
569 sdp->sd_log_num_hdrs++;
570 ld = (struct gfs2_log_descriptor *)
571 bh->b_data;
572 ptr = (__be64 *)(bh->b_data + offset);
573 ld->ld_header.mh_magic =
574 cpu_to_be32(GFS2_MAGIC);
575 ld->ld_header.mh_type =
576 cpu_to_be32(GFS2_METATYPE_LD);
577 ld->ld_header.mh_format =
578 cpu_to_be32(GFS2_FORMAT_LD);
579 ld->ld_type =
580 cpu_to_be32(GFS2_LOG_DESC_JDATA);
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);
592 gfs2_log_lock(sdp);
593 if (n++ > num)
594 break;
595 }
596 }
597 gfs2_log_unlock(sdp);
598 if (bh) {
599 set_buffer_dirty(bh);
600 ll_rw_block(WRITE, 1, &bh);
601 bh = NULL;
602 }
603 n = 0;
604 gfs2_log_lock(sdp);
605 list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf,
606 bd_le.le_list) {
607 if (!bd2->bd_bh)
608 continue;
609 /* copy buffer if it needs escaping */
610 gfs2_log_unlock(sdp);
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);
616 memcpy(bh->b_data,
617 kaddr + bh_offset(bd2->bd_bh),
618 sdp->sd_sb.sb_bsize);
619 kunmap_atomic(page, KM_USER0);
620 *(__be32 *)bh->b_data = 0;
621 } else {
622 bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
623 }
624 set_buffer_dirty(bh);
625 ll_rw_block(WRITE, 1, &bh);
626 gfs2_log_lock(sdp);
627 if (++n >= num)
628 break;
629 }
630 bh = NULL;
631 total_dbuf -= num;
632 total_jdata -= num;
633 }
634 gfs2_log_unlock(sdp);
635
636 /* Wait on all ordered buffers */
637 while (!list_empty(&started)) {
638 gfs2_log_lock(sdp);
639 bd1 = list_entry(started.next, struct gfs2_bufdata,
640 bd_le.le_list);
641 list_del(&bd1->bd_le.le_list);
642 sdp->sd_log_num_databuf--;
643
644 bh = bd1->bd_bh;
645 if (bh) {
646 bh->b_private = NULL;
647 gfs2_log_unlock(sdp);
648 wait_on_buffer(bh);
649 brelse(bh);
650 } else
651 gfs2_log_unlock(sdp);
652
653 kmem_cache_free(gfs2_bufdata_cachep, bd1);
654 }
655
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
660static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
661 struct gfs2_log_descriptor *ld,
662 __be64 *ptr, int pass)
663{
664 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
665 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
666 struct gfs2_glock *gl = ip->i_gl;
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
713static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
714{
715 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
716 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
717
718 if (error) {
719 gfs2_meta_sync(ip->i_gl,
720 DIO_START | DIO_WAIT);
721 return;
722 }
723 if (pass != 1)
724 return;
725
726 /* data sync? */
727 gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT);
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
733static 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);
740 list_del(&bd->bd_le.le_list);
741 sdp->sd_log_num_databuf--;
742 sdp->sd_log_num_jdata--;
743 gfs2_unpin(sdp, bd->bd_bh, ai);
744 }
745 gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
746 gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata);
747}
748
749
750const struct gfs2_log_operations gfs2_glock_lops = {
751 .lo_add = glock_lo_add,
752 .lo_after_commit = glock_lo_after_commit,
753 .lo_name = "glock"
754};
755
756const struct gfs2_log_operations gfs2_buf_lops = {
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
767const struct gfs2_log_operations gfs2_revoke_lops = {
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
776const struct gfs2_log_operations gfs2_rg_lops = {
777 .lo_add = rg_lo_add,
778 .lo_after_commit = rg_lo_after_commit,
779 .lo_name = "rg"
780};
781
782const struct gfs2_log_operations gfs2_databuf_lops = {
783 .lo_add = databuf_lo_add,
784 .lo_incore_commit = buf_lo_incore_commit,
785 .lo_before_commit = databuf_lo_before_commit,
786 .lo_after_commit = databuf_lo_after_commit,
787 .lo_scan_elements = databuf_lo_scan_elements,
788 .lo_after_scan = databuf_lo_after_scan,
789 .lo_name = "databuf"
790};
791
792const struct gfs2_log_operations *gfs2_log_ops[] = {
793 &gfs2_glock_lops,
794 &gfs2_buf_lops,
795 &gfs2_revoke_lops,
796 &gfs2_rg_lops,
797 &gfs2_databuf_lops,
798 NULL
799};
800
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-04 09:42:47 -0500