fed up with those stupid warnings
[mmotm.git] / fs / gfs2 / lops.c
blobc038ae65be45dba449d14c2487e964d557173aca
1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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 version 2.
8 */
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 #include <linux/bio.h>
17 #include <linux/fs.h>
18 #include <trace/events/gfs2.h>
20 #include "gfs2.h"
21 #include "incore.h"
22 #include "inode.h"
23 #include "glock.h"
24 #include "log.h"
25 #include "lops.h"
26 #include "meta_io.h"
27 #include "recovery.h"
28 #include "rgrp.h"
29 #include "trans.h"
30 #include "util.h"
32 /**
33 * gfs2_pin - Pin a buffer in memory
34 * @sdp: The superblock
35 * @bh: The buffer to be pinned
37 * The log lock must be held when calling this function
39 static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
41 struct gfs2_bufdata *bd;
43 gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
45 clear_buffer_dirty(bh);
46 if (test_set_buffer_pinned(bh))
47 gfs2_assert_withdraw(sdp, 0);
48 if (!buffer_uptodate(bh))
49 gfs2_io_error_bh(sdp, bh);
50 bd = bh->b_private;
51 /* If this buffer is in the AIL and it has already been written
52 * to in-place disk block, remove it from the AIL.
54 if (bd->bd_ail)
55 list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
56 get_bh(bh);
57 trace_gfs2_pin(bd, 1);
60 /**
61 * gfs2_unpin - Unpin a buffer
62 * @sdp: the filesystem the buffer belongs to
63 * @bh: The buffer to unpin
64 * @ai:
68 static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
69 struct gfs2_ail *ai)
71 struct gfs2_bufdata *bd = bh->b_private;
73 gfs2_assert_withdraw(sdp, buffer_uptodate(bh));
75 if (!buffer_pinned(bh))
76 gfs2_assert_withdraw(sdp, 0);
78 lock_buffer(bh);
79 mark_buffer_dirty(bh);
80 clear_buffer_pinned(bh);
82 gfs2_log_lock(sdp);
83 if (bd->bd_ail) {
84 list_del(&bd->bd_ail_st_list);
85 brelse(bh);
86 } else {
87 struct gfs2_glock *gl = bd->bd_gl;
88 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
89 atomic_inc(&gl->gl_ail_count);
91 bd->bd_ail = ai;
92 list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
93 clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
94 trace_gfs2_pin(bd, 0);
95 gfs2_log_unlock(sdp);
96 unlock_buffer(bh);
100 static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh)
102 return (struct gfs2_log_descriptor *)bh->b_data;
105 static inline __be64 *bh_log_ptr(struct buffer_head *bh)
107 struct gfs2_log_descriptor *ld = bh_log_desc(bh);
108 return (__force __be64 *)(ld + 1);
111 static inline __be64 *bh_ptr_end(struct buffer_head *bh)
113 return (__force __be64 *)(bh->b_data + bh->b_size);
117 static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
119 struct buffer_head *bh = gfs2_log_get_buf(sdp);
120 struct gfs2_log_descriptor *ld = bh_log_desc(bh);
121 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
122 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
123 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
124 ld->ld_type = cpu_to_be32(ld_type);
125 ld->ld_length = 0;
126 ld->ld_data1 = 0;
127 ld->ld_data2 = 0;
128 memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
129 return bh;
132 static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
134 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
135 struct gfs2_trans *tr;
137 lock_buffer(bd->bd_bh);
138 gfs2_log_lock(sdp);
139 if (!list_empty(&bd->bd_list_tr))
140 goto out;
141 tr = current->journal_info;
142 tr->tr_touched = 1;
143 tr->tr_num_buf++;
144 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
145 if (!list_empty(&le->le_list))
146 goto out;
147 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
148 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
149 gfs2_meta_check(sdp, bd->bd_bh);
150 gfs2_pin(sdp, bd->bd_bh);
151 sdp->sd_log_num_buf++;
152 list_add(&le->le_list, &sdp->sd_log_le_buf);
153 tr->tr_num_buf_new++;
154 out:
155 gfs2_log_unlock(sdp);
156 unlock_buffer(bd->bd_bh);
159 static void buf_lo_before_commit(struct gfs2_sbd *sdp)
161 struct buffer_head *bh;
162 struct gfs2_log_descriptor *ld;
163 struct gfs2_bufdata *bd1 = NULL, *bd2;
164 unsigned int total;
165 unsigned int limit;
166 unsigned int num;
167 unsigned n;
168 __be64 *ptr;
170 limit = buf_limit(sdp);
171 /* for 4k blocks, limit = 503 */
173 gfs2_log_lock(sdp);
174 total = sdp->sd_log_num_buf;
175 bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list);
176 while(total) {
177 num = total;
178 if (total > limit)
179 num = limit;
180 gfs2_log_unlock(sdp);
181 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA);
182 gfs2_log_lock(sdp);
183 ld = bh_log_desc(bh);
184 ptr = bh_log_ptr(bh);
185 ld->ld_length = cpu_to_be32(num + 1);
186 ld->ld_data1 = cpu_to_be32(num);
188 n = 0;
189 list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
190 bd_le.le_list) {
191 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
192 if (++n >= num)
193 break;
196 gfs2_log_unlock(sdp);
197 submit_bh(WRITE_SYNC_PLUG, bh);
198 gfs2_log_lock(sdp);
200 n = 0;
201 list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
202 bd_le.le_list) {
203 get_bh(bd2->bd_bh);
204 gfs2_log_unlock(sdp);
205 lock_buffer(bd2->bd_bh);
206 bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
207 submit_bh(WRITE_SYNC_PLUG, bh);
208 gfs2_log_lock(sdp);
209 if (++n >= num)
210 break;
213 BUG_ON(total < num);
214 total -= num;
216 gfs2_log_unlock(sdp);
219 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
221 struct list_head *head = &sdp->sd_log_le_buf;
222 struct gfs2_bufdata *bd;
224 while (!list_empty(head)) {
225 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
226 list_del_init(&bd->bd_le.le_list);
227 sdp->sd_log_num_buf--;
229 gfs2_unpin(sdp, bd->bd_bh, ai);
231 gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
234 static void buf_lo_before_scan(struct gfs2_jdesc *jd,
235 struct gfs2_log_header_host *head, int pass)
237 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
239 if (pass != 0)
240 return;
242 sdp->sd_found_blocks = 0;
243 sdp->sd_replayed_blocks = 0;
246 static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
247 struct gfs2_log_descriptor *ld, __be64 *ptr,
248 int pass)
250 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
251 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
252 struct gfs2_glock *gl = ip->i_gl;
253 unsigned int blks = be32_to_cpu(ld->ld_data1);
254 struct buffer_head *bh_log, *bh_ip;
255 u64 blkno;
256 int error = 0;
258 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
259 return 0;
261 gfs2_replay_incr_blk(sdp, &start);
263 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
264 blkno = be64_to_cpu(*ptr++);
266 sdp->sd_found_blocks++;
268 if (gfs2_revoke_check(sdp, blkno, start))
269 continue;
271 error = gfs2_replay_read_block(jd, start, &bh_log);
272 if (error)
273 return error;
275 bh_ip = gfs2_meta_new(gl, blkno);
276 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
278 if (gfs2_meta_check(sdp, bh_ip))
279 error = -EIO;
280 else
281 mark_buffer_dirty(bh_ip);
283 brelse(bh_log);
284 brelse(bh_ip);
286 if (error)
287 break;
289 sdp->sd_replayed_blocks++;
292 return error;
295 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
297 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
298 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
300 if (error) {
301 gfs2_meta_sync(ip->i_gl);
302 return;
304 if (pass != 1)
305 return;
307 gfs2_meta_sync(ip->i_gl);
309 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
310 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
313 static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
315 struct gfs2_trans *tr;
317 tr = current->journal_info;
318 tr->tr_touched = 1;
319 tr->tr_num_revoke++;
320 sdp->sd_log_num_revoke++;
321 list_add(&le->le_list, &sdp->sd_log_le_revoke);
324 static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
326 struct gfs2_log_descriptor *ld;
327 struct gfs2_meta_header *mh;
328 struct buffer_head *bh;
329 unsigned int offset;
330 struct list_head *head = &sdp->sd_log_le_revoke;
331 struct gfs2_bufdata *bd;
333 if (!sdp->sd_log_num_revoke)
334 return;
336 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE);
337 ld = bh_log_desc(bh);
338 ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
339 sizeof(u64)));
340 ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke);
341 offset = sizeof(struct gfs2_log_descriptor);
343 while (!list_empty(head)) {
344 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
345 list_del_init(&bd->bd_le.le_list);
346 sdp->sd_log_num_revoke--;
348 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
349 submit_bh(WRITE_SYNC_PLUG, bh);
351 bh = gfs2_log_get_buf(sdp);
352 mh = (struct gfs2_meta_header *)bh->b_data;
353 mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
354 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
355 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
356 offset = sizeof(struct gfs2_meta_header);
359 *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno);
360 kmem_cache_free(gfs2_bufdata_cachep, bd);
362 offset += sizeof(u64);
364 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
366 submit_bh(WRITE_SYNC_PLUG, bh);
369 static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
370 struct gfs2_log_header_host *head, int pass)
372 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
374 if (pass != 0)
375 return;
377 sdp->sd_found_revokes = 0;
378 sdp->sd_replay_tail = head->lh_tail;
381 static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
382 struct gfs2_log_descriptor *ld, __be64 *ptr,
383 int pass)
385 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
386 unsigned int blks = be32_to_cpu(ld->ld_length);
387 unsigned int revokes = be32_to_cpu(ld->ld_data1);
388 struct buffer_head *bh;
389 unsigned int offset;
390 u64 blkno;
391 int first = 1;
392 int error;
394 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
395 return 0;
397 offset = sizeof(struct gfs2_log_descriptor);
399 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
400 error = gfs2_replay_read_block(jd, start, &bh);
401 if (error)
402 return error;
404 if (!first)
405 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
407 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
408 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
410 error = gfs2_revoke_add(sdp, blkno, start);
411 if (error < 0) {
412 brelse(bh);
413 return error;
415 else if (error)
416 sdp->sd_found_revokes++;
418 if (!--revokes)
419 break;
420 offset += sizeof(u64);
423 brelse(bh);
424 offset = sizeof(struct gfs2_meta_header);
425 first = 0;
428 return 0;
431 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
433 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
435 if (error) {
436 gfs2_revoke_clean(sdp);
437 return;
439 if (pass != 1)
440 return;
442 fs_info(sdp, "jid=%u: Found %u revoke tags\n",
443 jd->jd_jid, sdp->sd_found_revokes);
445 gfs2_revoke_clean(sdp);
448 static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
450 struct gfs2_rgrpd *rgd;
451 struct gfs2_trans *tr = current->journal_info;
453 tr->tr_touched = 1;
455 rgd = container_of(le, struct gfs2_rgrpd, rd_le);
457 gfs2_log_lock(sdp);
458 if (!list_empty(&le->le_list)){
459 gfs2_log_unlock(sdp);
460 return;
462 gfs2_rgrp_bh_hold(rgd);
463 sdp->sd_log_num_rg++;
464 list_add(&le->le_list, &sdp->sd_log_le_rg);
465 gfs2_log_unlock(sdp);
468 static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
470 struct list_head *head = &sdp->sd_log_le_rg;
471 struct gfs2_rgrpd *rgd;
473 while (!list_empty(head)) {
474 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list);
475 list_del_init(&rgd->rd_le.le_list);
476 sdp->sd_log_num_rg--;
478 gfs2_rgrp_repolish_clones(rgd);
479 gfs2_rgrp_bh_put(rgd);
481 gfs2_assert_warn(sdp, !sdp->sd_log_num_rg);
485 * databuf_lo_add - Add a databuf to the transaction.
487 * This is used in two distinct cases:
488 * i) In ordered write mode
489 * We put the data buffer on a list so that we can ensure that its
490 * synced to disk at the right time
491 * ii) In journaled data mode
492 * We need to journal the data block in the same way as metadata in
493 * the functions above. The difference is that here we have a tag
494 * which is two __be64's being the block number (as per meta data)
495 * and a flag which says whether the data block needs escaping or
496 * not. This means we need a new log entry for each 251 or so data
497 * blocks, which isn't an enormous overhead but twice as much as
498 * for normal metadata blocks.
500 static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
502 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
503 struct gfs2_trans *tr = current->journal_info;
504 struct address_space *mapping = bd->bd_bh->b_page->mapping;
505 struct gfs2_inode *ip = GFS2_I(mapping->host);
507 lock_buffer(bd->bd_bh);
508 gfs2_log_lock(sdp);
509 if (tr) {
510 if (!list_empty(&bd->bd_list_tr))
511 goto out;
512 tr->tr_touched = 1;
513 if (gfs2_is_jdata(ip)) {
514 tr->tr_num_buf++;
515 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
518 if (!list_empty(&le->le_list))
519 goto out;
521 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
522 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
523 if (gfs2_is_jdata(ip)) {
524 gfs2_pin(sdp, bd->bd_bh);
525 tr->tr_num_databuf_new++;
526 sdp->sd_log_num_databuf++;
527 list_add(&le->le_list, &sdp->sd_log_le_databuf);
528 } else {
529 list_add(&le->le_list, &sdp->sd_log_le_ordered);
531 out:
532 gfs2_log_unlock(sdp);
533 unlock_buffer(bd->bd_bh);
536 static void gfs2_check_magic(struct buffer_head *bh)
538 void *kaddr;
539 __be32 *ptr;
541 clear_buffer_escaped(bh);
542 kaddr = kmap_atomic(bh->b_page, KM_USER0);
543 ptr = kaddr + bh_offset(bh);
544 if (*ptr == cpu_to_be32(GFS2_MAGIC))
545 set_buffer_escaped(bh);
546 kunmap_atomic(kaddr, KM_USER0);
549 static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh,
550 struct list_head *list, struct list_head *done,
551 unsigned int n)
553 struct buffer_head *bh1;
554 struct gfs2_log_descriptor *ld;
555 struct gfs2_bufdata *bd;
556 __be64 *ptr;
558 if (!bh)
559 return;
561 ld = bh_log_desc(bh);
562 ld->ld_length = cpu_to_be32(n + 1);
563 ld->ld_data1 = cpu_to_be32(n);
565 ptr = bh_log_ptr(bh);
567 get_bh(bh);
568 submit_bh(WRITE_SYNC_PLUG, bh);
569 gfs2_log_lock(sdp);
570 while(!list_empty(list)) {
571 bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list);
572 list_move_tail(&bd->bd_le.le_list, done);
573 get_bh(bd->bd_bh);
574 while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) {
575 gfs2_log_incr_head(sdp);
576 ptr += 2;
578 gfs2_log_unlock(sdp);
579 lock_buffer(bd->bd_bh);
580 if (buffer_escaped(bd->bd_bh)) {
581 void *kaddr;
582 bh1 = gfs2_log_get_buf(sdp);
583 kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0);
584 memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh),
585 bh1->b_size);
586 kunmap_atomic(kaddr, KM_USER0);
587 *(__be32 *)bh1->b_data = 0;
588 clear_buffer_escaped(bd->bd_bh);
589 unlock_buffer(bd->bd_bh);
590 brelse(bd->bd_bh);
591 } else {
592 bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh);
594 submit_bh(WRITE_SYNC_PLUG, bh1);
595 gfs2_log_lock(sdp);
596 ptr += 2;
598 gfs2_log_unlock(sdp);
599 brelse(bh);
603 * databuf_lo_before_commit - Scan the data buffers, writing as we go
607 static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
609 struct gfs2_bufdata *bd = NULL;
610 struct buffer_head *bh = NULL;
611 unsigned int n = 0;
612 __be64 *ptr = NULL, *end = NULL;
613 LIST_HEAD(processed);
614 LIST_HEAD(in_progress);
616 gfs2_log_lock(sdp);
617 while (!list_empty(&sdp->sd_log_le_databuf)) {
618 if (ptr == end) {
619 gfs2_log_unlock(sdp);
620 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
621 n = 0;
622 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA);
623 ptr = bh_log_ptr(bh);
624 end = bh_ptr_end(bh) - 1;
625 gfs2_log_lock(sdp);
626 continue;
628 bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list);
629 list_move_tail(&bd->bd_le.le_list, &in_progress);
630 gfs2_check_magic(bd->bd_bh);
631 *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr);
632 *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0);
633 n++;
635 gfs2_log_unlock(sdp);
636 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
637 gfs2_log_lock(sdp);
638 list_splice(&processed, &sdp->sd_log_le_databuf);
639 gfs2_log_unlock(sdp);
642 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
643 struct gfs2_log_descriptor *ld,
644 __be64 *ptr, int pass)
646 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
647 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
648 struct gfs2_glock *gl = ip->i_gl;
649 unsigned int blks = be32_to_cpu(ld->ld_data1);
650 struct buffer_head *bh_log, *bh_ip;
651 u64 blkno;
652 u64 esc;
653 int error = 0;
655 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
656 return 0;
658 gfs2_replay_incr_blk(sdp, &start);
659 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
660 blkno = be64_to_cpu(*ptr++);
661 esc = be64_to_cpu(*ptr++);
663 sdp->sd_found_blocks++;
665 if (gfs2_revoke_check(sdp, blkno, start))
666 continue;
668 error = gfs2_replay_read_block(jd, start, &bh_log);
669 if (error)
670 return error;
672 bh_ip = gfs2_meta_new(gl, blkno);
673 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
675 /* Unescape */
676 if (esc) {
677 __be32 *eptr = (__be32 *)bh_ip->b_data;
678 *eptr = cpu_to_be32(GFS2_MAGIC);
680 mark_buffer_dirty(bh_ip);
682 brelse(bh_log);
683 brelse(bh_ip);
684 if (error)
685 break;
687 sdp->sd_replayed_blocks++;
690 return error;
693 /* FIXME: sort out accounting for log blocks etc. */
695 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
697 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
698 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
700 if (error) {
701 gfs2_meta_sync(ip->i_gl);
702 return;
704 if (pass != 1)
705 return;
707 /* data sync? */
708 gfs2_meta_sync(ip->i_gl);
710 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
711 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
714 static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
716 struct list_head *head = &sdp->sd_log_le_databuf;
717 struct gfs2_bufdata *bd;
719 while (!list_empty(head)) {
720 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
721 list_del_init(&bd->bd_le.le_list);
722 sdp->sd_log_num_databuf--;
723 gfs2_unpin(sdp, bd->bd_bh, ai);
725 gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
729 const struct gfs2_log_operations gfs2_buf_lops = {
730 .lo_add = buf_lo_add,
731 .lo_before_commit = buf_lo_before_commit,
732 .lo_after_commit = buf_lo_after_commit,
733 .lo_before_scan = buf_lo_before_scan,
734 .lo_scan_elements = buf_lo_scan_elements,
735 .lo_after_scan = buf_lo_after_scan,
736 .lo_name = "buf",
739 const struct gfs2_log_operations gfs2_revoke_lops = {
740 .lo_add = revoke_lo_add,
741 .lo_before_commit = revoke_lo_before_commit,
742 .lo_before_scan = revoke_lo_before_scan,
743 .lo_scan_elements = revoke_lo_scan_elements,
744 .lo_after_scan = revoke_lo_after_scan,
745 .lo_name = "revoke",
748 const struct gfs2_log_operations gfs2_rg_lops = {
749 .lo_add = rg_lo_add,
750 .lo_after_commit = rg_lo_after_commit,
751 .lo_name = "rg",
754 const struct gfs2_log_operations gfs2_databuf_lops = {
755 .lo_add = databuf_lo_add,
756 .lo_before_commit = databuf_lo_before_commit,
757 .lo_after_commit = databuf_lo_after_commit,
758 .lo_scan_elements = databuf_lo_scan_elements,
759 .lo_after_scan = databuf_lo_after_scan,
760 .lo_name = "databuf",
763 const struct gfs2_log_operations *gfs2_log_ops[] = {
764 &gfs2_databuf_lops,
765 &gfs2_buf_lops,
766 &gfs2_rg_lops,
767 &gfs2_revoke_lops,
768 NULL,