2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #define _XOPEN_SOURCE 600
24 #include <sys/types.h>
28 #include "kerncompat.h"
29 #include "radix-tree.h"
33 #include "transaction.h"
36 #include "print-tree.h"
38 static int check_tree_block(struct btrfs_root
*root
, struct extent_buffer
*buf
)
40 if (buf
->start
!= btrfs_header_bytenr(buf
))
43 if (memcmp_extent_buffer(buf
, root
->fs_info
->fsid
,
44 (unsigned long)btrfs_header_fsid(buf
),
50 u32
btrfs_csum_data(struct btrfs_root
*root
, char *data
, u32 seed
, size_t len
)
52 return crc32c(seed
, data
, len
);
55 void btrfs_csum_final(u32 crc
, char *result
)
57 *(__le32
*)result
= ~cpu_to_le32(crc
);
60 int csum_tree_block(struct btrfs_root
*root
, struct extent_buffer
*buf
,
63 char result
[BTRFS_CRC32_SIZE
];
67 len
= buf
->len
- BTRFS_CSUM_SIZE
;
68 crc
= crc32c(crc
, buf
->data
+ BTRFS_CSUM_SIZE
, len
);
69 btrfs_csum_final(crc
, result
);
72 if (memcmp_extent_buffer(buf
, result
, 0, BTRFS_CRC32_SIZE
)) {
73 printk("checksum verify failed on %llu wanted %X "
74 "found %X\n", (unsigned long long)buf
->start
,
75 *((int *)result
), *((int *)buf
));
79 write_extent_buffer(buf
, result
, 0, BTRFS_CRC32_SIZE
);
84 struct extent_buffer
*btrfs_find_tree_block(struct btrfs_root
*root
,
85 u64 bytenr
, u32 blocksize
)
87 return find_extent_buffer(&root
->fs_info
->extent_cache
,
91 struct extent_buffer
*btrfs_find_create_tree_block(struct btrfs_root
*root
,
92 u64 bytenr
, u32 blocksize
)
94 return alloc_extent_buffer(&root
->fs_info
->extent_cache
, bytenr
,
98 int readahead_tree_block(struct btrfs_root
*root
, u64 bytenr
, u32 blocksize
)
102 struct extent_buffer
*eb
;
104 struct btrfs_multi_bio
*multi
= NULL
;
105 struct btrfs_device
*device
;
107 eb
= btrfs_find_tree_block(root
, bytenr
, blocksize
);
108 if (eb
&& btrfs_buffer_uptodate(eb
)) {
109 free_extent_buffer(eb
);
115 ret
= btrfs_map_block(&root
->fs_info
->mapping_tree
, READ
,
116 bytenr
, &length
, &multi
, 0);
118 device
= multi
->stripes
[0].dev
;
120 blocksize
= min(blocksize
, (u32
)(64 * 1024));
121 readahead(device
->fd
, multi
->stripes
[0].physical
, blocksize
);
126 struct extent_buffer
*read_tree_block(struct btrfs_root
*root
, u64 bytenr
,
131 struct extent_buffer
*eb
;
133 struct btrfs_multi_bio
*multi
= NULL
;
134 struct btrfs_device
*device
;
138 eb
= btrfs_find_create_tree_block(root
, bytenr
, blocksize
);
142 if (btrfs_buffer_uptodate(eb
))
148 ret
= btrfs_map_block(&root
->fs_info
->mapping_tree
, READ
,
149 eb
->start
, &length
, &multi
, mirror_num
);
151 device
= multi
->stripes
[0].dev
;
154 eb
->dev_bytenr
= multi
->stripes
[0].physical
;
156 ret
= read_extent_from_disk(eb
);
157 if (ret
== 0 && check_tree_block(root
, eb
) == 0 &&
158 csum_tree_block(root
, eb
, 1) == 0) {
159 btrfs_set_buffer_uptodate(eb
);
162 num_copies
= btrfs_num_copies(&root
->fs_info
->mapping_tree
,
164 if (num_copies
== 1) {
165 printk("reading %Lu failed only one copy\n", eb
->start
);
169 if (mirror_num
> num_copies
) {
170 printk("bailing at mirror %d of %d\n", mirror_num
, num_copies
);
174 free_extent_buffer(eb
);
178 int write_tree_block(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
179 struct extent_buffer
*eb
)
184 struct btrfs_multi_bio
*multi
= NULL
;
186 if (check_tree_block(root
, eb
))
188 if (!btrfs_buffer_uptodate(eb
))
191 btrfs_set_header_flag(eb
, BTRFS_HEADER_FLAG_WRITTEN
);
192 csum_tree_block(root
, eb
, 0);
196 ret
= btrfs_map_block(&root
->fs_info
->mapping_tree
, WRITE
,
197 eb
->start
, &length
, &multi
, 0);
199 while(dev_nr
< multi
->num_stripes
) {
201 eb
->fd
= multi
->stripes
[dev_nr
].dev
->fd
;
202 eb
->dev_bytenr
= multi
->stripes
[dev_nr
].physical
;
203 multi
->stripes
[dev_nr
].dev
->total_ios
++;
205 ret
= write_extent_to_disk(eb
);
212 static int __setup_root(u32 nodesize
, u32 leafsize
, u32 sectorsize
,
213 u32 stripesize
, struct btrfs_root
*root
,
214 struct btrfs_fs_info
*fs_info
, u64 objectid
)
217 root
->commit_root
= NULL
;
218 root
->sectorsize
= sectorsize
;
219 root
->nodesize
= nodesize
;
220 root
->leafsize
= leafsize
;
221 root
->stripesize
= stripesize
;
223 root
->track_dirty
= 0;
225 root
->fs_info
= fs_info
;
226 root
->objectid
= objectid
;
227 root
->last_trans
= 0;
228 root
->highest_inode
= 0;
229 root
->last_inode_alloc
= 0;
231 INIT_LIST_HEAD(&root
->dirty_list
);
232 memset(&root
->root_key
, 0, sizeof(root
->root_key
));
233 memset(&root
->root_item
, 0, sizeof(root
->root_item
));
234 root
->root_key
.objectid
= objectid
;
238 static int update_cowonly_root(struct btrfs_trans_handle
*trans
,
239 struct btrfs_root
*root
)
243 struct btrfs_root
*tree_root
= root
->fs_info
->tree_root
;
245 btrfs_write_dirty_block_groups(trans
, root
);
247 old_root_bytenr
= btrfs_root_bytenr(&root
->root_item
);
248 if (old_root_bytenr
== root
->node
->start
)
250 btrfs_set_root_bytenr(&root
->root_item
,
252 root
->root_item
.level
= btrfs_header_level(root
->node
);
253 ret
= btrfs_update_root(trans
, tree_root
,
257 btrfs_write_dirty_block_groups(trans
, root
);
262 static int commit_tree_roots(struct btrfs_trans_handle
*trans
,
263 struct btrfs_fs_info
*fs_info
)
265 struct btrfs_root
*root
;
266 struct list_head
*next
;
268 while(!list_empty(&fs_info
->dirty_cowonly_roots
)) {
269 next
= fs_info
->dirty_cowonly_roots
.next
;
271 root
= list_entry(next
, struct btrfs_root
, dirty_list
);
272 update_cowonly_root(trans
, root
);
277 static int __commit_transaction(struct btrfs_trans_handle
*trans
,
278 struct btrfs_root
*root
)
282 struct extent_buffer
*eb
;
283 struct extent_io_tree
*tree
= &root
->fs_info
->extent_cache
;
287 ret
= find_first_extent_bit(tree
, 0, &start
, &end
,
291 while(start
<= end
) {
292 eb
= find_first_extent_buffer(tree
, start
);
293 BUG_ON(!eb
|| eb
->start
!= start
);
294 ret
= write_tree_block(trans
, root
, eb
);
297 clear_extent_buffer_dirty(eb
);
298 free_extent_buffer(eb
);
304 int btrfs_commit_transaction(struct btrfs_trans_handle
*trans
,
305 struct btrfs_root
*root
)
308 struct btrfs_root
*new_root
= NULL
;
309 struct btrfs_fs_info
*fs_info
= root
->fs_info
;
311 if (root
->commit_root
== root
->node
)
314 new_root
= malloc(sizeof(*new_root
));
317 memcpy(new_root
, root
, sizeof(*new_root
));
318 new_root
->node
= root
->commit_root
;
319 root
->commit_root
= NULL
;
321 root
->root_key
.offset
= trans
->transid
;
322 btrfs_set_root_bytenr(&root
->root_item
, root
->node
->start
);
323 root
->root_item
.level
= btrfs_header_level(root
->node
);
324 ret
= btrfs_insert_root(trans
, fs_info
->tree_root
,
325 &root
->root_key
, &root
->root_item
);
328 btrfs_set_root_refs(&new_root
->root_item
, 0);
329 ret
= btrfs_update_root(trans
, root
->fs_info
->tree_root
,
330 &new_root
->root_key
, &new_root
->root_item
);
333 ret
= commit_tree_roots(trans
, fs_info
);
335 ret
= __commit_transaction(trans
, root
);
337 write_ctree_super(trans
, root
);
338 btrfs_finish_extent_commit(trans
, fs_info
->extent_root
,
339 &fs_info
->pinned_extents
);
340 btrfs_free_transaction(root
, trans
);
341 fs_info
->running_transaction
= NULL
;
343 trans
= btrfs_start_transaction(root
, 1);
344 ret
= btrfs_drop_snapshot(trans
, new_root
);
346 ret
= btrfs_del_root(trans
, fs_info
->tree_root
, &new_root
->root_key
);
349 ret
= commit_tree_roots(trans
, fs_info
);
351 ret
= __commit_transaction(trans
, root
);
353 write_ctree_super(trans
, root
);
354 btrfs_finish_extent_commit(trans
, fs_info
->extent_root
,
355 &fs_info
->pinned_extents
);
356 btrfs_free_transaction(root
, trans
);
357 free_extent_buffer(root
->commit_root
);
358 root
->commit_root
= NULL
;
359 fs_info
->running_transaction
= NULL
;
361 free_extent_buffer(new_root
->node
);
367 static int find_and_setup_root(struct btrfs_root
*tree_root
,
368 struct btrfs_fs_info
*fs_info
,
369 u64 objectid
, struct btrfs_root
*root
)
374 __setup_root(tree_root
->nodesize
, tree_root
->leafsize
,
375 tree_root
->sectorsize
, tree_root
->stripesize
,
376 root
, fs_info
, objectid
);
377 ret
= btrfs_find_last_root(tree_root
, objectid
,
378 &root
->root_item
, &root
->root_key
);
381 blocksize
= btrfs_level_size(root
, btrfs_root_level(&root
->root_item
));
382 root
->node
= read_tree_block(root
, btrfs_root_bytenr(&root
->root_item
),
388 int btrfs_free_fs_root(struct btrfs_fs_info
*fs_info
, struct btrfs_root
*root
)
391 free_extent_buffer(root
->node
);
392 if (root
->commit_root
)
393 free_extent_buffer(root
->commit_root
);
399 struct btrfs_root
*btrfs_read_fs_root(struct btrfs_fs_info
*fs_info
,
400 struct btrfs_key
*location
)
402 struct btrfs_root
*root
;
403 struct btrfs_root
*tree_root
= fs_info
->tree_root
;
404 struct btrfs_path
*path
;
405 struct extent_buffer
*l
;
409 root
= malloc(sizeof(*root
));
411 return ERR_PTR(-ENOMEM
);
412 memset(root
, 0, sizeof(*root
));
413 if (location
->offset
== (u64
)-1) {
414 ret
= find_and_setup_root(tree_root
, fs_info
,
415 location
->objectid
, root
);
423 __setup_root(tree_root
->nodesize
, tree_root
->leafsize
,
424 tree_root
->sectorsize
, tree_root
->stripesize
,
425 root
, fs_info
, location
->objectid
);
427 path
= btrfs_alloc_path();
429 ret
= btrfs_search_slot(NULL
, tree_root
, location
, path
, 0, 0);
436 read_extent_buffer(l
, &root
->root_item
,
437 btrfs_item_ptr_offset(l
, path
->slots
[0]),
438 sizeof(root
->root_item
));
439 memcpy(&root
->root_key
, location
, sizeof(*location
));
442 btrfs_release_path(root
, path
);
443 btrfs_free_path(path
);
448 blocksize
= btrfs_level_size(root
, btrfs_root_level(&root
->root_item
));
449 root
->node
= read_tree_block(root
, btrfs_root_bytenr(&root
->root_item
),
457 struct btrfs_root
*open_ctree(const char *filename
, u64 sb_bytenr
)
461 fp
= open(filename
, O_CREAT
| O_RDWR
, 0600);
465 return open_ctree_fd(fp
, filename
, sb_bytenr
);
468 struct btrfs_root
*open_ctree_fd(int fp
, const char *path
, u64 sb_bytenr
)
475 struct btrfs_root
*root
= malloc(sizeof(struct btrfs_root
));
476 struct btrfs_root
*tree_root
= malloc(sizeof(struct btrfs_root
));
477 struct btrfs_root
*extent_root
= malloc(sizeof(struct btrfs_root
));
478 struct btrfs_root
*chunk_root
= malloc(sizeof(struct btrfs_root
));
479 struct btrfs_root
*dev_root
= malloc(sizeof(struct btrfs_root
));
480 struct btrfs_fs_info
*fs_info
= malloc(sizeof(*fs_info
));
482 struct btrfs_super_block
*disk_super
;
483 struct btrfs_fs_devices
*fs_devices
= NULL
;
487 sb_bytenr
= BTRFS_SUPER_INFO_OFFSET
;
489 ret
= btrfs_scan_one_device(fp
, path
, &fs_devices
,
490 &total_devs
, sb_bytenr
);
493 fprintf(stderr
, "No valid Btrfs found on %s\n", path
);
496 fprintf(stderr
, "found Btrfs on %s with %lu devices\n", path
,
497 (unsigned long)total_devs
);
499 if (total_devs
!= 1) {
500 ret
= btrfs_scan_for_fsid(fs_devices
, total_devs
, 1);
504 memset(fs_info
, 0, sizeof(*fs_info
));
505 fs_info
->fp
= fs_devices
->lowest_bdev
;
506 fs_info
->fs_root
= root
;
507 fs_info
->tree_root
= tree_root
;
508 fs_info
->extent_root
= extent_root
;
509 fs_info
->chunk_root
= chunk_root
;
510 fs_info
->dev_root
= dev_root
;
512 extent_io_tree_init(&fs_info
->extent_cache
);
513 extent_io_tree_init(&fs_info
->free_space_cache
);
514 extent_io_tree_init(&fs_info
->block_group_cache
);
515 extent_io_tree_init(&fs_info
->pinned_extents
);
516 extent_io_tree_init(&fs_info
->pending_del
);
517 extent_io_tree_init(&fs_info
->extent_ins
);
519 cache_tree_init(&fs_info
->mapping_tree
.cache_tree
);
521 mutex_init(&fs_info
->fs_mutex
);
522 fs_info
->fs_devices
= fs_devices
;
523 INIT_LIST_HEAD(&fs_info
->dirty_cowonly_roots
);
524 INIT_LIST_HEAD(&fs_info
->space_info
);
526 __setup_root(4096, 4096, 4096, 4096, tree_root
,
527 fs_info
, BTRFS_ROOT_TREE_OBJECTID
);
529 ret
= btrfs_open_devices(fs_devices
, O_RDWR
);
532 ret
= btrfs_bootstrap_super_map(&fs_info
->mapping_tree
, fs_devices
);
534 fs_info
->sb_buffer
= btrfs_find_create_tree_block(tree_root
, sb_bytenr
,
536 BUG_ON(!fs_info
->sb_buffer
);
537 fs_info
->sb_buffer
->fd
= fs_devices
->latest_bdev
;
538 fs_info
->sb_buffer
->dev_bytenr
= sb_bytenr
;
539 ret
= read_extent_from_disk(fs_info
->sb_buffer
);
541 btrfs_set_buffer_uptodate(fs_info
->sb_buffer
);
543 read_extent_buffer(fs_info
->sb_buffer
, &fs_info
->super_copy
, 0,
544 sizeof(fs_info
->super_copy
));
545 read_extent_buffer(fs_info
->sb_buffer
, fs_info
->fsid
,
546 (unsigned long)btrfs_super_fsid(fs_info
->sb_buffer
),
549 disk_super
= &fs_info
->super_copy
;
550 if (strncmp((char *)(&disk_super
->magic
), BTRFS_MAGIC
,
551 sizeof(disk_super
->magic
))) {
552 printk("No valid btrfs found\n");
555 nodesize
= btrfs_super_nodesize(disk_super
);
556 leafsize
= btrfs_super_leafsize(disk_super
);
557 sectorsize
= btrfs_super_sectorsize(disk_super
);
558 stripesize
= btrfs_super_stripesize(disk_super
);
559 tree_root
->nodesize
= nodesize
;
560 tree_root
->leafsize
= leafsize
;
561 tree_root
->sectorsize
= sectorsize
;
562 tree_root
->stripesize
= stripesize
;
564 ret
= btrfs_read_super_device(tree_root
, fs_info
->sb_buffer
);
566 ret
= btrfs_read_sys_array(tree_root
);
568 blocksize
= btrfs_level_size(tree_root
,
569 btrfs_super_chunk_root_level(disk_super
));
571 __setup_root(nodesize
, leafsize
, sectorsize
, stripesize
,
572 chunk_root
, fs_info
, BTRFS_CHUNK_TREE_OBJECTID
);
574 chunk_root
->node
= read_tree_block(chunk_root
,
575 btrfs_super_chunk_root(disk_super
),
578 BUG_ON(!chunk_root
->node
);
580 ret
= btrfs_read_chunk_tree(chunk_root
);
583 blocksize
= btrfs_level_size(tree_root
,
584 btrfs_super_root_level(disk_super
));
586 tree_root
->node
= read_tree_block(tree_root
,
587 btrfs_super_root(disk_super
),
589 BUG_ON(!tree_root
->node
);
590 ret
= find_and_setup_root(tree_root
, fs_info
,
591 BTRFS_EXTENT_TREE_OBJECTID
, extent_root
);
593 extent_root
->track_dirty
= 1;
595 ret
= find_and_setup_root(tree_root
, fs_info
,
596 BTRFS_DEV_TREE_OBJECTID
, dev_root
);
598 dev_root
->track_dirty
= 1;
600 ret
= find_and_setup_root(tree_root
, fs_info
,
601 BTRFS_FS_TREE_OBJECTID
, root
);
604 fs_info
->generation
= btrfs_super_generation(disk_super
) + 1;
605 btrfs_read_block_groups(root
);
607 fs_info
->data_alloc_profile
= (u64
)-1;
608 fs_info
->metadata_alloc_profile
= (u64
)-1;
609 fs_info
->system_alloc_profile
= fs_info
->metadata_alloc_profile
;
614 int write_all_supers(struct btrfs_root
*root
)
616 struct list_head
*cur
;
617 struct list_head
*head
= &root
->fs_info
->fs_devices
->devices
;
618 struct btrfs_device
*dev
;
619 struct extent_buffer
*sb
;
620 struct btrfs_dev_item
*dev_item
;
623 sb
= root
->fs_info
->sb_buffer
;
624 dev_item
= (struct btrfs_dev_item
*)offsetof(struct btrfs_super_block
,
626 list_for_each(cur
, head
) {
627 dev
= list_entry(cur
, struct btrfs_device
, dev_list
);
628 btrfs_set_device_type(sb
, dev_item
, dev
->type
);
629 btrfs_set_device_id(sb
, dev_item
, dev
->devid
);
630 btrfs_set_device_total_bytes(sb
, dev_item
, dev
->total_bytes
);
631 btrfs_set_device_bytes_used(sb
, dev_item
, dev
->bytes_used
);
632 btrfs_set_device_io_align(sb
, dev_item
, dev
->io_align
);
633 btrfs_set_device_io_width(sb
, dev_item
, dev
->io_width
);
634 btrfs_set_device_sector_size(sb
, dev_item
, dev
->sector_size
);
635 write_extent_buffer(sb
, dev
->uuid
,
636 (unsigned long)btrfs_device_uuid(dev_item
),
637 BTRFS_DEV_UUID_SIZE
);
639 sb
->dev_bytenr
= BTRFS_SUPER_INFO_OFFSET
;
640 btrfs_set_header_flag(sb
, BTRFS_HEADER_FLAG_WRITTEN
);
641 csum_tree_block(root
, sb
, 0);
642 ret
= write_extent_to_disk(sb
);
648 int write_ctree_super(struct btrfs_trans_handle
*trans
,
649 struct btrfs_root
*root
)
652 struct btrfs_root
*tree_root
= root
->fs_info
->tree_root
;
653 struct btrfs_root
*chunk_root
= root
->fs_info
->chunk_root
;
654 btrfs_set_super_generation(&root
->fs_info
->super_copy
,
656 btrfs_set_super_root(&root
->fs_info
->super_copy
,
657 tree_root
->node
->start
);
658 btrfs_set_super_root_level(&root
->fs_info
->super_copy
,
659 btrfs_header_level(tree_root
->node
));
660 btrfs_set_super_chunk_root(&root
->fs_info
->super_copy
,
661 chunk_root
->node
->start
);
662 btrfs_set_super_chunk_root_level(&root
->fs_info
->super_copy
,
663 btrfs_header_level(chunk_root
->node
));
664 write_extent_buffer(root
->fs_info
->sb_buffer
,
665 &root
->fs_info
->super_copy
, 0,
666 sizeof(root
->fs_info
->super_copy
));
667 ret
= write_all_supers(root
);
669 fprintf(stderr
, "failed to write new super block err %d\n", ret
);
673 static int close_all_devices(struct btrfs_fs_info
*fs_info
)
675 struct list_head
*list
;
676 struct list_head
*next
;
677 struct btrfs_device
*device
;
681 list
= &fs_info
->fs_devices
->devices
;
682 list_for_each(next
, list
) {
683 device
= list_entry(next
, struct btrfs_device
, dev_list
);
684 // close(device->fd);
689 int close_ctree(struct btrfs_root
*root
)
692 struct btrfs_trans_handle
*trans
;
693 struct btrfs_fs_info
*fs_info
= root
->fs_info
;
695 trans
= btrfs_start_transaction(root
, 1);
696 btrfs_commit_transaction(trans
, root
);
697 trans
= btrfs_start_transaction(root
, 1);
698 ret
= commit_tree_roots(trans
, root
->fs_info
);
700 ret
= __commit_transaction(trans
, root
);
702 write_ctree_super(trans
, root
);
703 btrfs_free_transaction(root
, trans
);
704 btrfs_free_block_groups(root
->fs_info
);
705 close(root
->fs_info
->fp
);
707 free_extent_buffer(root
->node
);
708 if (root
->fs_info
->extent_root
->node
)
709 free_extent_buffer(root
->fs_info
->extent_root
->node
);
710 if (root
->fs_info
->tree_root
->node
)
711 free_extent_buffer(root
->fs_info
->tree_root
->node
);
712 free_extent_buffer(root
->commit_root
);
713 free_extent_buffer(root
->fs_info
->sb_buffer
);
715 if (root
->fs_info
->chunk_root
->node
);
716 free_extent_buffer(root
->fs_info
->chunk_root
->node
);
718 if (root
->fs_info
->dev_root
->node
);
719 free_extent_buffer(root
->fs_info
->dev_root
->node
);
721 close_all_devices(root
->fs_info
);
722 extent_io_tree_cleanup(&fs_info
->extent_cache
);
723 extent_io_tree_cleanup(&fs_info
->free_space_cache
);
724 extent_io_tree_cleanup(&fs_info
->block_group_cache
);
725 extent_io_tree_cleanup(&fs_info
->pinned_extents
);
726 extent_io_tree_cleanup(&fs_info
->pending_del
);
727 extent_io_tree_cleanup(&fs_info
->extent_ins
);
729 free(fs_info
->tree_root
);
730 free(fs_info
->extent_root
);
731 free(fs_info
->fs_root
);
732 free(fs_info
->chunk_root
);
733 free(fs_info
->dev_root
);
739 int clean_tree_block(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
740 struct extent_buffer
*eb
)
742 return clear_extent_buffer_dirty(eb
);
745 int wait_on_tree_block_writeback(struct btrfs_root
*root
,
746 struct extent_buffer
*eb
)
751 void btrfs_mark_buffer_dirty(struct extent_buffer
*eb
)
753 set_extent_buffer_dirty(eb
);
756 int btrfs_buffer_uptodate(struct extent_buffer
*eb
)
758 return extent_buffer_uptodate(eb
);
761 int btrfs_set_buffer_uptodate(struct extent_buffer
*eb
)
763 return set_extent_buffer_uptodate(eb
);