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.
21 #include <sys/types.h>
25 #include <uuid/uuid.h>
26 #include "kerncompat.h"
27 #include "radix-tree.h"
31 #include "transaction.h"
34 #include "print-tree.h"
35 #include "rbtree-utils.h"
37 /* specified errno for check_tree_block */
38 #define BTRFS_BAD_BYTENR (-1)
39 #define BTRFS_BAD_FSID (-2)
40 #define BTRFS_BAD_LEVEL (-3)
41 #define BTRFS_BAD_NRITEMS (-4)
43 #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
45 /* Calculate max possible nritems for a leaf/node */
46 static u32 max_nritems(u8 level, u32 nodesize)
50 return ((nodesize - sizeof(struct btrfs_header)) /
51 sizeof(struct btrfs_item));
52 return ((nodesize - sizeof(struct btrfs_header)) /
53 sizeof(struct btrfs_key_ptr));
56 static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
59 struct btrfs_fs_devices *fs_devices;
60 int ret = BTRFS_BAD_FSID;
62 if (buf->start != btrfs_header_bytenr(buf))
63 return BTRFS_BAD_BYTENR;
64 if (btrfs_header_level(buf) >= BTRFS_MAX_LEVEL)
65 return BTRFS_BAD_LEVEL;
66 if (btrfs_header_nritems(buf) > max_nritems(btrfs_header_level(buf),
68 return BTRFS_BAD_NRITEMS;
70 fs_devices = root->fs_info->fs_devices;
72 if (root->fs_info->ignore_fsid_mismatch ||
73 !memcmp_extent_buffer(buf, fs_devices->fsid,
79 fs_devices = fs_devices->seed;
84 static void print_tree_block_error(struct btrfs_root *root,
85 struct extent_buffer *eb,
88 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = {'\0'};
89 char found_uuid[BTRFS_UUID_UNPARSED_SIZE] = {'\0'};
90 u8 buf[BTRFS_UUID_SIZE];
94 read_extent_buffer(eb, buf, btrfs_header_fsid(),
96 uuid_unparse(buf, found_uuid);
97 uuid_unparse(root->fs_info->fsid, fs_uuid);
98 fprintf(stderr, "fsid mismatch, want=%s, have=%s\n",
101 case BTRFS_BAD_BYTENR:
102 fprintf(stderr, "bytenr mismatch, want=%llu, have=%llu\n",
103 eb->start, btrfs_header_bytenr(eb));
105 case BTRFS_BAD_LEVEL:
106 fprintf(stderr, "bad level, %u > %u\n",
107 btrfs_header_level(eb), BTRFS_MAX_LEVEL);
109 case BTRFS_BAD_NRITEMS:
110 fprintf(stderr, "invalid nr_items: %u\n",
111 btrfs_header_nritems(eb));
116 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len)
118 return crc32c(seed, data, len);
121 void btrfs_csum_final(u32 crc, char *result)
123 *(__le32 *)result = ~cpu_to_le32(crc);
126 static int __csum_tree_block_size(struct extent_buffer *buf, u16 csum_size,
127 int verify, int silent)
129 char result[BTRFS_CSUM_SIZE];
133 len = buf->len - BTRFS_CSUM_SIZE;
134 crc = crc32c(crc, buf->data + BTRFS_CSUM_SIZE, len);
135 btrfs_csum_final(crc, result);
138 if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
140 printk("checksum verify failed on %llu found %08X wanted %08X\n",
141 (unsigned long long)buf->start,
143 *((u32*)(char *)buf->data));
147 write_extent_buffer(buf, result, 0, csum_size);
152 int csum_tree_block_size(struct extent_buffer *buf, u16 csum_size, int verify)
154 return __csum_tree_block_size(buf, csum_size, verify, 0);
157 int verify_tree_block_csum_silent(struct extent_buffer *buf, u16 csum_size)
159 return __csum_tree_block_size(buf, csum_size, 1, 1);
162 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
166 btrfs_super_csum_size(root->fs_info->super_copy);
167 if (verify && root->fs_info->suppress_check_block_errors)
168 return verify_tree_block_csum_silent(buf, csum_size);
169 return csum_tree_block_size(buf, csum_size, verify);
172 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
173 u64 bytenr, u32 blocksize)
175 return find_extent_buffer(&root->fs_info->extent_cache,
179 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
180 u64 bytenr, u32 blocksize)
182 return alloc_extent_buffer(&root->fs_info->extent_cache, bytenr,
186 void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
189 struct extent_buffer *eb;
191 struct btrfs_multi_bio *multi = NULL;
192 struct btrfs_device *device;
194 eb = btrfs_find_tree_block(root, bytenr, blocksize);
195 if (!(eb && btrfs_buffer_uptodate(eb, parent_transid)) &&
196 !btrfs_map_block(&root->fs_info->mapping_tree, READ,
197 bytenr, &length, &multi, 0, NULL)) {
198 device = multi->stripes[0].dev;
200 blocksize = min(blocksize, (u32)(64 * 1024));
201 readahead(device->fd, multi->stripes[0].physical, blocksize);
204 free_extent_buffer(eb);
208 static int verify_parent_transid(struct extent_io_tree *io_tree,
209 struct extent_buffer *eb, u64 parent_transid,
214 if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
217 if (extent_buffer_uptodate(eb) &&
218 btrfs_header_generation(eb) == parent_transid) {
222 printk("parent transid verify failed on %llu wanted %llu found %llu\n",
223 (unsigned long long)eb->start,
224 (unsigned long long)parent_transid,
225 (unsigned long long)btrfs_header_generation(eb));
227 eb->flags |= EXTENT_BAD_TRANSID;
228 printk("Ignoring transid failure\n");
234 clear_extent_buffer_uptodate(io_tree, eb);
240 int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror)
242 unsigned long offset = 0;
243 struct btrfs_multi_bio *multi = NULL;
244 struct btrfs_device *device;
247 unsigned long bytes_left = eb->len;
250 read_len = bytes_left;
253 if (!info->on_restoring &&
254 eb->start != BTRFS_SUPER_INFO_OFFSET) {
255 ret = btrfs_map_block(&info->mapping_tree, READ,
256 eb->start + offset, &read_len, &multi,
259 printk("Couldn't map the block %Lu\n", eb->start + offset);
263 device = multi->stripes[0].dev;
265 if (device->fd <= 0) {
272 eb->dev_bytenr = multi->stripes[0].physical;
276 /* special case for restore metadump */
277 list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
278 if (device->devid == 1)
283 eb->dev_bytenr = eb->start;
287 if (read_len > bytes_left)
288 read_len = bytes_left;
290 ret = read_extent_from_disk(eb, offset, read_len);
294 bytes_left -= read_len;
299 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
300 u32 blocksize, u64 parent_transid)
303 struct extent_buffer *eb;
304 u64 best_transid = 0;
310 eb = btrfs_find_create_tree_block(root, bytenr, blocksize);
312 return ERR_PTR(-ENOMEM);
314 if (btrfs_buffer_uptodate(eb, parent_transid))
318 ret = read_whole_eb(root->fs_info, eb, mirror_num);
319 if (ret == 0 && csum_tree_block(root, eb, 1) == 0 &&
320 check_tree_block(root, eb) == 0 &&
321 verify_parent_transid(eb->tree, eb, parent_transid, ignore)
323 if (eb->flags & EXTENT_BAD_TRANSID &&
324 list_empty(&eb->recow)) {
325 list_add_tail(&eb->recow,
326 &root->fs_info->recow_ebs);
329 btrfs_set_buffer_uptodate(eb);
333 if (check_tree_block(root, eb)) {
334 if (!root->fs_info->suppress_check_block_errors)
335 print_tree_block_error(root, eb,
336 check_tree_block(root, eb));
338 if (!root->fs_info->suppress_check_block_errors)
339 fprintf(stderr, "Csum didn't match\n");
344 num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
346 if (num_copies == 1) {
350 if (btrfs_header_generation(eb) > best_transid && mirror_num) {
351 best_transid = btrfs_header_generation(eb);
352 good_mirror = mirror_num;
355 if (mirror_num > num_copies) {
356 mirror_num = good_mirror;
361 free_extent_buffer(eb);
365 int read_extent_data(struct btrfs_root *root, char *data,
366 u64 logical, u64 *len, int mirror)
369 struct btrfs_multi_bio *multi = NULL;
370 struct btrfs_fs_info *info = root->fs_info;
371 struct btrfs_device *device;
375 ret = btrfs_map_block(&info->mapping_tree, READ, logical, len,
376 &multi, mirror, NULL);
378 fprintf(stderr, "Couldn't map the block %llu\n",
382 device = multi->stripes[0].dev;
389 ret = pread64(device->fd, data, *len, multi->stripes[0].physical);
399 int write_and_map_eb(struct btrfs_trans_handle *trans,
400 struct btrfs_root *root,
401 struct extent_buffer *eb)
406 u64 *raid_map = NULL;
407 struct btrfs_multi_bio *multi = NULL;
411 ret = btrfs_map_block(&root->fs_info->mapping_tree, WRITE,
412 eb->start, &length, &multi, 0, &raid_map);
415 ret = write_raid56_with_parity(root->fs_info, eb, multi,
418 } else while (dev_nr < multi->num_stripes) {
420 eb->fd = multi->stripes[dev_nr].dev->fd;
421 eb->dev_bytenr = multi->stripes[dev_nr].physical;
422 multi->stripes[dev_nr].dev->total_ios++;
424 ret = write_extent_to_disk(eb);
432 int write_tree_block(struct btrfs_trans_handle *trans,
433 struct btrfs_root *root,
434 struct extent_buffer *eb)
436 if (check_tree_block(root, eb)) {
437 print_tree_block_error(root, eb, check_tree_block(root, eb));
441 if (trans && !btrfs_buffer_uptodate(eb, trans->transid))
444 btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
445 csum_tree_block(root, eb, 0);
447 return write_and_map_eb(trans, root, eb);
450 int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
451 u32 stripesize, struct btrfs_root *root,
452 struct btrfs_fs_info *fs_info, u64 objectid)
455 root->commit_root = NULL;
456 root->sectorsize = sectorsize;
457 root->nodesize = nodesize;
458 root->leafsize = leafsize;
459 root->stripesize = stripesize;
461 root->track_dirty = 0;
463 root->fs_info = fs_info;
464 root->objectid = objectid;
465 root->last_trans = 0;
466 root->highest_inode = 0;
467 root->last_inode_alloc = 0;
469 INIT_LIST_HEAD(&root->dirty_list);
470 INIT_LIST_HEAD(&root->orphan_data_extents);
471 memset(&root->root_key, 0, sizeof(root->root_key));
472 memset(&root->root_item, 0, sizeof(root->root_item));
473 root->root_key.objectid = objectid;
477 static int update_cowonly_root(struct btrfs_trans_handle *trans,
478 struct btrfs_root *root)
482 struct btrfs_root *tree_root = root->fs_info->tree_root;
484 btrfs_write_dirty_block_groups(trans, root);
486 old_root_bytenr = btrfs_root_bytenr(&root->root_item);
487 if (old_root_bytenr == root->node->start)
489 btrfs_set_root_bytenr(&root->root_item,
491 btrfs_set_root_generation(&root->root_item,
493 root->root_item.level = btrfs_header_level(root->node);
494 ret = btrfs_update_root(trans, tree_root,
498 btrfs_write_dirty_block_groups(trans, root);
503 static int commit_tree_roots(struct btrfs_trans_handle *trans,
504 struct btrfs_fs_info *fs_info)
506 struct btrfs_root *root;
507 struct list_head *next;
508 struct extent_buffer *eb;
511 if (fs_info->readonly)
514 eb = fs_info->tree_root->node;
515 extent_buffer_get(eb);
516 ret = btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb);
517 free_extent_buffer(eb);
521 while(!list_empty(&fs_info->dirty_cowonly_roots)) {
522 next = fs_info->dirty_cowonly_roots.next;
524 root = list_entry(next, struct btrfs_root, dirty_list);
525 update_cowonly_root(trans, root);
526 free_extent_buffer(root->commit_root);
527 root->commit_root = NULL;
533 static int __commit_transaction(struct btrfs_trans_handle *trans,
534 struct btrfs_root *root)
538 struct extent_buffer *eb;
539 struct extent_io_tree *tree = &root->fs_info->extent_cache;
543 ret = find_first_extent_bit(tree, 0, &start, &end,
547 while(start <= end) {
548 eb = find_first_extent_buffer(tree, start);
549 BUG_ON(!eb || eb->start != start);
550 ret = write_tree_block(trans, root, eb);
553 clear_extent_buffer_dirty(eb);
554 free_extent_buffer(eb);
560 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
561 struct btrfs_root *root)
563 u64 transid = trans->transid;
565 struct btrfs_fs_info *fs_info = root->fs_info;
567 if (root->commit_root == root->node)
569 if (root == root->fs_info->tree_root)
571 if (root == root->fs_info->chunk_root)
574 free_extent_buffer(root->commit_root);
575 root->commit_root = NULL;
577 btrfs_set_root_bytenr(&root->root_item, root->node->start);
578 btrfs_set_root_generation(&root->root_item, trans->transid);
579 root->root_item.level = btrfs_header_level(root->node);
580 ret = btrfs_update_root(trans, root->fs_info->tree_root,
581 &root->root_key, &root->root_item);
584 ret = commit_tree_roots(trans, fs_info);
586 ret = __commit_transaction(trans, root);
588 write_ctree_super(trans, root);
589 btrfs_finish_extent_commit(trans, fs_info->extent_root,
590 &fs_info->pinned_extents);
591 btrfs_free_transaction(root, trans);
592 free_extent_buffer(root->commit_root);
593 root->commit_root = NULL;
594 fs_info->running_transaction = NULL;
595 fs_info->last_trans_committed = transid;
599 static int find_and_setup_root(struct btrfs_root *tree_root,
600 struct btrfs_fs_info *fs_info,
601 u64 objectid, struct btrfs_root *root)
607 __setup_root(tree_root->nodesize, tree_root->leafsize,
608 tree_root->sectorsize, tree_root->stripesize,
609 root, fs_info, objectid);
610 ret = btrfs_find_last_root(tree_root, objectid,
611 &root->root_item, &root->root_key);
615 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
616 generation = btrfs_root_generation(&root->root_item);
617 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
618 blocksize, generation);
619 if (!extent_buffer_uptodate(root->node))
625 static int find_and_setup_log_root(struct btrfs_root *tree_root,
626 struct btrfs_fs_info *fs_info,
627 struct btrfs_super_block *disk_super)
630 u64 blocknr = btrfs_super_log_root(disk_super);
631 struct btrfs_root *log_root = malloc(sizeof(struct btrfs_root));
641 blocksize = btrfs_level_size(tree_root,
642 btrfs_super_log_root_level(disk_super));
644 __setup_root(tree_root->nodesize, tree_root->leafsize,
645 tree_root->sectorsize, tree_root->stripesize,
646 log_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
648 log_root->node = read_tree_block(tree_root, blocknr,
650 btrfs_super_generation(disk_super) + 1);
652 fs_info->log_root_tree = log_root;
654 if (!extent_buffer_uptodate(log_root->node)) {
655 free_extent_buffer(log_root->node);
657 fs_info->log_root_tree = NULL;
664 int btrfs_free_fs_root(struct btrfs_root *root)
667 free_extent_buffer(root->node);
668 if (root->commit_root)
669 free_extent_buffer(root->commit_root);
674 static void __free_fs_root(struct rb_node *node)
676 struct btrfs_root *root;
678 root = container_of(node, struct btrfs_root, rb_node);
679 btrfs_free_fs_root(root);
682 FREE_RB_BASED_TREE(fs_roots, __free_fs_root);
684 struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
685 struct btrfs_key *location)
687 struct btrfs_root *root;
688 struct btrfs_root *tree_root = fs_info->tree_root;
689 struct btrfs_path *path;
690 struct extent_buffer *l;
695 root = calloc(1, sizeof(*root));
697 return ERR_PTR(-ENOMEM);
698 if (location->offset == (u64)-1) {
699 ret = find_and_setup_root(tree_root, fs_info,
700 location->objectid, root);
708 __setup_root(tree_root->nodesize, tree_root->leafsize,
709 tree_root->sectorsize, tree_root->stripesize,
710 root, fs_info, location->objectid);
712 path = btrfs_alloc_path();
714 ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0);
721 read_extent_buffer(l, &root->root_item,
722 btrfs_item_ptr_offset(l, path->slots[0]),
723 sizeof(root->root_item));
724 memcpy(&root->root_key, location, sizeof(*location));
727 btrfs_free_path(path);
732 generation = btrfs_root_generation(&root->root_item);
733 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
734 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
735 blocksize, generation);
736 if (!extent_buffer_uptodate(root->node)) {
738 return ERR_PTR(-EIO);
745 static int btrfs_fs_roots_compare_objectids(struct rb_node *node,
748 u64 objectid = *((u64 *)data);
749 struct btrfs_root *root;
751 root = rb_entry(node, struct btrfs_root, rb_node);
752 if (objectid > root->objectid)
754 else if (objectid < root->objectid)
760 static int btrfs_fs_roots_compare_roots(struct rb_node *node1,
761 struct rb_node *node2)
763 struct btrfs_root *root;
765 root = rb_entry(node2, struct btrfs_root, rb_node);
766 return btrfs_fs_roots_compare_objectids(node1, (void *)&root->objectid);
769 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
770 struct btrfs_key *location)
772 struct btrfs_root *root;
773 struct rb_node *node;
775 u64 objectid = location->objectid;
777 if (location->objectid == BTRFS_ROOT_TREE_OBJECTID)
778 return fs_info->tree_root;
779 if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID)
780 return fs_info->extent_root;
781 if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID)
782 return fs_info->chunk_root;
783 if (location->objectid == BTRFS_DEV_TREE_OBJECTID)
784 return fs_info->dev_root;
785 if (location->objectid == BTRFS_CSUM_TREE_OBJECTID)
786 return fs_info->csum_root;
787 if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID)
788 return fs_info->quota_root;
790 BUG_ON(location->objectid == BTRFS_TREE_RELOC_OBJECTID ||
791 location->offset != (u64)-1);
793 node = rb_search(&fs_info->fs_root_tree, (void *)&objectid,
794 btrfs_fs_roots_compare_objectids, NULL);
796 return container_of(node, struct btrfs_root, rb_node);
798 root = btrfs_read_fs_root_no_cache(fs_info, location);
802 ret = rb_insert(&fs_info->fs_root_tree, &root->rb_node,
803 btrfs_fs_roots_compare_roots);
808 void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
810 free(fs_info->tree_root);
811 free(fs_info->extent_root);
812 free(fs_info->chunk_root);
813 free(fs_info->dev_root);
814 free(fs_info->csum_root);
815 free(fs_info->quota_root);
816 free(fs_info->super_copy);
817 free(fs_info->log_root_tree);
821 struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
823 struct btrfs_fs_info *fs_info;
825 fs_info = calloc(1, sizeof(struct btrfs_fs_info));
829 fs_info->tree_root = calloc(1, sizeof(struct btrfs_root));
830 fs_info->extent_root = calloc(1, sizeof(struct btrfs_root));
831 fs_info->chunk_root = calloc(1, sizeof(struct btrfs_root));
832 fs_info->dev_root = calloc(1, sizeof(struct btrfs_root));
833 fs_info->csum_root = calloc(1, sizeof(struct btrfs_root));
834 fs_info->quota_root = calloc(1, sizeof(struct btrfs_root));
835 fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
837 if (!fs_info->tree_root || !fs_info->extent_root ||
838 !fs_info->chunk_root || !fs_info->dev_root ||
839 !fs_info->csum_root || !fs_info->quota_root ||
840 !fs_info->super_copy)
843 extent_io_tree_init(&fs_info->extent_cache);
844 extent_io_tree_init(&fs_info->free_space_cache);
845 extent_io_tree_init(&fs_info->block_group_cache);
846 extent_io_tree_init(&fs_info->pinned_extents);
847 extent_io_tree_init(&fs_info->pending_del);
848 extent_io_tree_init(&fs_info->extent_ins);
849 fs_info->excluded_extents = NULL;
851 fs_info->fs_root_tree = RB_ROOT;
852 cache_tree_init(&fs_info->mapping_tree.cache_tree);
854 mutex_init(&fs_info->fs_mutex);
855 INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
856 INIT_LIST_HEAD(&fs_info->space_info);
857 INIT_LIST_HEAD(&fs_info->recow_ebs);
860 fs_info->readonly = 1;
862 fs_info->super_bytenr = sb_bytenr;
863 fs_info->data_alloc_profile = (u64)-1;
864 fs_info->metadata_alloc_profile = (u64)-1;
865 fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
868 btrfs_free_fs_info(fs_info);
872 int btrfs_check_fs_compatibility(struct btrfs_super_block *sb, int writable)
876 features = btrfs_super_incompat_flags(sb) &
877 ~BTRFS_FEATURE_INCOMPAT_SUPP;
879 printk("couldn't open because of unsupported "
880 "option features (%Lx).\n",
881 (unsigned long long)features);
885 features = btrfs_super_incompat_flags(sb);
886 if (!(features & BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF)) {
887 features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF;
888 btrfs_set_super_incompat_flags(sb, features);
891 features = btrfs_super_compat_ro_flags(sb) &
892 ~BTRFS_FEATURE_COMPAT_RO_SUPP;
893 if (writable && features) {
894 printk("couldn't open RDWR because of unsupported "
895 "option features (%Lx).\n",
896 (unsigned long long)features);
902 static int find_best_backup_root(struct btrfs_super_block *super)
904 struct btrfs_root_backup *backup;
905 u64 orig_gen = btrfs_super_generation(super);
910 for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
911 backup = super->super_roots + i;
912 if (btrfs_backup_tree_root_gen(backup) != orig_gen &&
913 btrfs_backup_tree_root_gen(backup) > gen) {
915 gen = btrfs_backup_tree_root_gen(backup);
921 static int setup_root_or_create_block(struct btrfs_fs_info *fs_info,
922 enum btrfs_open_ctree_flags flags,
923 struct btrfs_root *info_root,
924 u64 objectid, char *str)
926 struct btrfs_super_block *sb = fs_info->super_copy;
927 struct btrfs_root *root = fs_info->tree_root;
928 u32 leafsize = btrfs_super_leafsize(sb);
931 ret = find_and_setup_root(root, fs_info, objectid, info_root);
933 printk("Couldn't setup %s tree\n", str);
934 if (!(flags & OPEN_CTREE_PARTIAL))
937 * Need a blank node here just so we don't screw up in the
938 * million of places that assume a root has a valid ->node
941 btrfs_find_create_tree_block(info_root, 0, leafsize);
942 if (!info_root->node)
944 clear_extent_buffer_uptodate(NULL, info_root->node);
950 int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
951 enum btrfs_open_ctree_flags flags)
953 struct btrfs_super_block *sb = fs_info->super_copy;
954 struct btrfs_root *root;
955 struct btrfs_key key;
964 nodesize = btrfs_super_nodesize(sb);
965 leafsize = btrfs_super_leafsize(sb);
966 sectorsize = btrfs_super_sectorsize(sb);
967 stripesize = btrfs_super_stripesize(sb);
969 root = fs_info->tree_root;
970 __setup_root(nodesize, leafsize, sectorsize, stripesize,
971 root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
972 blocksize = btrfs_level_size(root, btrfs_super_root_level(sb));
973 generation = btrfs_super_generation(sb);
975 if (!root_tree_bytenr && !(flags & OPEN_CTREE_BACKUP_ROOT)) {
976 root_tree_bytenr = btrfs_super_root(sb);
977 } else if (flags & OPEN_CTREE_BACKUP_ROOT) {
978 struct btrfs_root_backup *backup;
979 int index = find_best_backup_root(sb);
980 if (index >= BTRFS_NUM_BACKUP_ROOTS) {
981 fprintf(stderr, "Invalid backup root number\n");
984 backup = fs_info->super_copy->super_roots + index;
985 root_tree_bytenr = btrfs_backup_tree_root(backup);
986 generation = btrfs_backup_tree_root_gen(backup);
989 root->node = read_tree_block(root, root_tree_bytenr, blocksize,
991 if (!extent_buffer_uptodate(root->node)) {
992 fprintf(stderr, "Couldn't read tree root\n");
996 ret = setup_root_or_create_block(fs_info, flags, fs_info->extent_root,
997 BTRFS_EXTENT_TREE_OBJECTID, "extent");
1000 fs_info->extent_root->track_dirty = 1;
1002 ret = find_and_setup_root(root, fs_info, BTRFS_DEV_TREE_OBJECTID,
1005 printk("Couldn't setup device tree\n");
1008 fs_info->dev_root->track_dirty = 1;
1010 ret = setup_root_or_create_block(fs_info, flags, fs_info->csum_root,
1011 BTRFS_CSUM_TREE_OBJECTID, "csum");
1014 fs_info->csum_root->track_dirty = 1;
1016 ret = find_and_setup_root(root, fs_info, BTRFS_QUOTA_TREE_OBJECTID,
1017 fs_info->quota_root);
1019 fs_info->quota_enabled = 1;
1021 ret = find_and_setup_log_root(root, fs_info, sb);
1023 printk("Couldn't setup log root tree\n");
1024 if (!(flags & OPEN_CTREE_PARTIAL))
1028 fs_info->generation = generation;
1029 fs_info->last_trans_committed = generation;
1030 if (extent_buffer_uptodate(fs_info->extent_root->node) &&
1031 !(flags & OPEN_CTREE_NO_BLOCK_GROUPS))
1032 btrfs_read_block_groups(fs_info->tree_root);
1034 key.objectid = BTRFS_FS_TREE_OBJECTID;
1035 key.type = BTRFS_ROOT_ITEM_KEY;
1036 key.offset = (u64)-1;
1037 fs_info->fs_root = btrfs_read_fs_root(fs_info, &key);
1039 if (IS_ERR(fs_info->fs_root))
1044 void btrfs_release_all_roots(struct btrfs_fs_info *fs_info)
1046 if (fs_info->quota_root)
1047 free_extent_buffer(fs_info->quota_root->node);
1048 if (fs_info->csum_root)
1049 free_extent_buffer(fs_info->csum_root->node);
1050 if (fs_info->dev_root)
1051 free_extent_buffer(fs_info->dev_root->node);
1052 if (fs_info->extent_root)
1053 free_extent_buffer(fs_info->extent_root->node);
1054 if (fs_info->tree_root)
1055 free_extent_buffer(fs_info->tree_root->node);
1056 if (fs_info->log_root_tree)
1057 free_extent_buffer(fs_info->log_root_tree->node);
1058 if (fs_info->chunk_root)
1059 free_extent_buffer(fs_info->chunk_root->node);
1062 static void free_map_lookup(struct cache_extent *ce)
1064 struct map_lookup *map;
1066 map = container_of(ce, struct map_lookup, ce);
1070 FREE_EXTENT_CACHE_BASED_TREE(mapping_cache, free_map_lookup);
1072 void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info)
1074 while (!list_empty(&fs_info->recow_ebs)) {
1075 struct extent_buffer *eb;
1076 eb = list_first_entry(&fs_info->recow_ebs,
1077 struct extent_buffer, recow);
1078 list_del_init(&eb->recow);
1079 free_extent_buffer(eb);
1081 free_mapping_cache_tree(&fs_info->mapping_tree.cache_tree);
1082 extent_io_tree_cleanup(&fs_info->extent_cache);
1083 extent_io_tree_cleanup(&fs_info->free_space_cache);
1084 extent_io_tree_cleanup(&fs_info->block_group_cache);
1085 extent_io_tree_cleanup(&fs_info->pinned_extents);
1086 extent_io_tree_cleanup(&fs_info->pending_del);
1087 extent_io_tree_cleanup(&fs_info->extent_ins);
1090 int btrfs_scan_fs_devices(int fd, const char *path,
1091 struct btrfs_fs_devices **fs_devices,
1092 u64 sb_bytenr, int super_recover,
1100 sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
1102 seek_ret = lseek(fd, 0, SEEK_END);
1106 dev_size = seek_ret;
1107 lseek(fd, 0, SEEK_SET);
1108 if (sb_bytenr > dev_size) {
1109 fprintf(stderr, "Superblock bytenr is larger than device size\n");
1113 ret = btrfs_scan_one_device(fd, path, fs_devices,
1114 &total_devs, sb_bytenr, super_recover);
1116 fprintf(stderr, "No valid Btrfs found on %s\n", path);
1120 if (!skip_devices && total_devs != 1) {
1121 ret = btrfs_scan_lblkid();
1128 int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info)
1130 struct btrfs_super_block *sb = fs_info->super_copy;
1139 nodesize = btrfs_super_nodesize(sb);
1140 leafsize = btrfs_super_leafsize(sb);
1141 sectorsize = btrfs_super_sectorsize(sb);
1142 stripesize = btrfs_super_stripesize(sb);
1144 __setup_root(nodesize, leafsize, sectorsize, stripesize,
1145 fs_info->chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
1147 ret = btrfs_read_sys_array(fs_info->chunk_root);
1151 blocksize = btrfs_level_size(fs_info->chunk_root,
1152 btrfs_super_chunk_root_level(sb));
1153 generation = btrfs_super_chunk_root_generation(sb);
1155 fs_info->chunk_root->node = read_tree_block(fs_info->chunk_root,
1156 btrfs_super_chunk_root(sb),
1157 blocksize, generation);
1158 if (!extent_buffer_uptodate(fs_info->chunk_root->node)) {
1159 fprintf(stderr, "Couldn't read chunk root\n");
1163 if (!(btrfs_super_flags(sb) & BTRFS_SUPER_FLAG_METADUMP)) {
1164 ret = btrfs_read_chunk_tree(fs_info->chunk_root);
1166 fprintf(stderr, "Couldn't read chunk tree\n");
1173 static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
1175 u64 root_tree_bytenr,
1176 enum btrfs_open_ctree_flags flags)
1178 struct btrfs_fs_info *fs_info;
1179 struct btrfs_super_block *disk_super;
1180 struct btrfs_fs_devices *fs_devices = NULL;
1181 struct extent_buffer *eb;
1186 sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
1188 /* try to drop all the caches */
1189 if (posix_fadvise(fp, 0, 0, POSIX_FADV_DONTNEED))
1190 fprintf(stderr, "Warning, could not drop caches\n");
1192 fs_info = btrfs_new_fs_info(flags & OPEN_CTREE_WRITES, sb_bytenr);
1194 fprintf(stderr, "Failed to allocate memory for fs_info\n");
1197 if (flags & OPEN_CTREE_RESTORE)
1198 fs_info->on_restoring = 1;
1199 if (flags & OPEN_CTREE_SUPPRESS_CHECK_BLOCK_ERRORS)
1200 fs_info->suppress_check_block_errors = 1;
1201 if (flags & OPEN_CTREE_IGNORE_FSID_MISMATCH)
1202 fs_info->ignore_fsid_mismatch = 1;
1204 ret = btrfs_scan_fs_devices(fp, path, &fs_devices, sb_bytenr,
1205 (flags & OPEN_CTREE_RECOVER_SUPER),
1206 (flags & OPEN_CTREE_NO_DEVICES));
1210 fs_info->fs_devices = fs_devices;
1211 if (flags & OPEN_CTREE_WRITES)
1216 if (flags & OPEN_CTREE_EXCLUSIVE)
1219 ret = btrfs_open_devices(fs_devices, oflags);
1223 disk_super = fs_info->super_copy;
1224 if (!(flags & OPEN_CTREE_RECOVER_SUPER))
1225 ret = btrfs_read_dev_super(fs_devices->latest_bdev,
1226 disk_super, sb_bytenr, 1);
1228 ret = btrfs_read_dev_super(fp, disk_super, sb_bytenr, 0);
1230 printk("No valid btrfs found\n");
1234 if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_CHANGING_FSID &&
1235 !fs_info->ignore_fsid_mismatch) {
1236 fprintf(stderr, "ERROR: Filesystem UUID change in progress\n");
1240 memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
1242 ret = btrfs_check_fs_compatibility(fs_info->super_copy,
1243 flags & OPEN_CTREE_WRITES);
1247 ret = btrfs_setup_chunk_tree_and_device_map(fs_info);
1251 eb = fs_info->chunk_root->node;
1252 read_extent_buffer(eb, fs_info->chunk_tree_uuid,
1253 btrfs_header_chunk_tree_uuid(eb),
1256 ret = btrfs_setup_all_roots(fs_info, root_tree_bytenr, flags);
1257 if (ret && !(flags & __OPEN_CTREE_RETURN_CHUNK_ROOT))
1263 btrfs_release_all_roots(fs_info);
1264 btrfs_cleanup_all_caches(fs_info);
1266 btrfs_close_devices(fs_devices);
1268 btrfs_free_fs_info(fs_info);
1272 struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
1273 u64 sb_bytenr, u64 root_tree_bytenr,
1274 enum btrfs_open_ctree_flags flags)
1277 struct btrfs_fs_info *info;
1278 int oflags = O_CREAT | O_RDWR;
1280 if (!(flags & OPEN_CTREE_WRITES))
1283 fp = open(filename, oflags, 0600);
1285 fprintf (stderr, "Could not open %s\n", filename);
1288 info = __open_ctree_fd(fp, filename, sb_bytenr, root_tree_bytenr,
1294 struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr,
1295 enum btrfs_open_ctree_flags flags)
1297 struct btrfs_fs_info *info;
1299 info = open_ctree_fs_info(filename, sb_bytenr, 0, flags);
1302 if (flags & __OPEN_CTREE_RETURN_CHUNK_ROOT)
1303 return info->chunk_root;
1304 return info->fs_root;
1307 struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
1308 enum btrfs_open_ctree_flags flags)
1310 struct btrfs_fs_info *info;
1311 info = __open_ctree_fd(fp, path, sb_bytenr, 0, flags);
1314 if (flags & __OPEN_CTREE_RETURN_CHUNK_ROOT)
1315 return info->chunk_root;
1316 return info->fs_root;
1320 * Check if the super is valid:
1321 * - nodesize/sectorsize - minimum, maximum, alignment
1322 * - tree block starts - alignment
1323 * - number of devices - something sane
1324 * - sys array size - maximum
1326 static int check_super(struct btrfs_super_block *sb)
1328 char result[BTRFS_CSUM_SIZE];
1333 if (btrfs_super_magic(sb) != BTRFS_MAGIC) {
1334 fprintf(stderr, "ERROR: superblock magic doesn't match\n");
1338 csum_type = btrfs_super_csum_type(sb);
1339 if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
1340 fprintf(stderr, "ERROR: unsupported checksum algorithm %u\n",
1344 csum_size = btrfs_csum_sizes[csum_type];
1347 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
1348 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
1349 btrfs_csum_final(crc, result);
1351 if (memcmp(result, sb->csum, csum_size)) {
1352 fprintf(stderr, "ERROR: superblock checksum mismatch\n");
1355 if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) {
1356 fprintf(stderr, "ERROR: tree_root level too big: %d >= %d\n",
1357 btrfs_super_root_level(sb), BTRFS_MAX_LEVEL);
1360 if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) {
1361 fprintf(stderr, "ERROR: chunk_root level too big: %d >= %d\n",
1362 btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL);
1365 if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) {
1366 fprintf(stderr, "ERROR: log_root level too big: %d >= %d\n",
1367 btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL);
1371 if (!IS_ALIGNED(btrfs_super_root(sb), 4096)) {
1372 fprintf(stderr, "ERROR: tree_root block unaligned: %llu\n",
1373 btrfs_super_root(sb));
1376 if (!IS_ALIGNED(btrfs_super_chunk_root(sb), 4096)) {
1377 fprintf(stderr, "ERROR: chunk_root block unaligned: %llu\n",
1378 btrfs_super_chunk_root(sb));
1381 if (!IS_ALIGNED(btrfs_super_log_root(sb), 4096)) {
1382 fprintf(stderr, "ERROR: log_root block unaligned: %llu\n",
1383 btrfs_super_log_root(sb));
1386 if (btrfs_super_nodesize(sb) < 4096) {
1387 fprintf(stderr, "ERROR: nodesize too small: %u < 4096\n",
1388 btrfs_super_nodesize(sb));
1391 if (!IS_ALIGNED(btrfs_super_nodesize(sb), 4096)) {
1392 fprintf(stderr, "ERROR: nodesize unaligned: %u\n",
1393 btrfs_super_nodesize(sb));
1396 if (btrfs_super_sectorsize(sb) < 4096) {
1397 fprintf(stderr, "ERROR: sectorsize too small: %u < 4096\n",
1398 btrfs_super_sectorsize(sb));
1401 if (!IS_ALIGNED(btrfs_super_sectorsize(sb), 4096)) {
1402 fprintf(stderr, "ERROR: sectorsize unaligned: %u\n",
1403 btrfs_super_sectorsize(sb));
1407 if (memcmp(sb->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) {
1408 char fsid[BTRFS_UUID_UNPARSED_SIZE];
1409 char dev_fsid[BTRFS_UUID_UNPARSED_SIZE];
1411 uuid_unparse(sb->fsid, fsid);
1412 uuid_unparse(sb->dev_item.fsid, dev_fsid);
1414 "ERROR: dev_item UUID does not match fsid: %s != %s\n",
1420 * Hint to catch really bogus numbers, bitflips or so
1422 if (btrfs_super_num_devices(sb) > (1UL << 31)) {
1423 fprintf(stderr, "WARNING: suspicious number of devices: %llu\n",
1424 btrfs_super_num_devices(sb));
1427 if (btrfs_super_num_devices(sb) == 0) {
1428 fprintf(stderr, "ERROR: number of devices is 0\n");
1433 * Obvious sys_chunk_array corruptions, it must hold at least one key
1436 if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
1437 fprintf(stderr, "BTRFS: system chunk array too big %u > %u\n",
1438 btrfs_super_sys_array_size(sb),
1439 BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
1442 if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
1443 + sizeof(struct btrfs_chunk)) {
1444 fprintf(stderr, "BTRFS: system chunk array too small %u < %lu\n",
1445 btrfs_super_sys_array_size(sb),
1446 sizeof(struct btrfs_disk_key) +
1447 sizeof(struct btrfs_chunk));
1454 int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr,
1457 u8 fsid[BTRFS_FSID_SIZE];
1458 int fsid_is_initialized = 0;
1459 char tmp[BTRFS_SUPER_INFO_SIZE];
1460 struct btrfs_super_block *buf = (struct btrfs_super_block *)tmp;
1463 int max_super = super_recover ? BTRFS_SUPER_MIRROR_MAX : 1;
1467 if (sb_bytenr != BTRFS_SUPER_INFO_OFFSET) {
1468 ret = pread64(fd, buf, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
1469 if (ret < BTRFS_SUPER_INFO_SIZE)
1472 if (btrfs_super_bytenr(buf) != sb_bytenr)
1475 if (check_super(buf))
1477 memcpy(sb, buf, BTRFS_SUPER_INFO_SIZE);
1482 * we would like to check all the supers, but that would make
1483 * a btrfs mount succeed after a mkfs from a different FS.
1484 * So, we need to add a special mount option to scan for
1485 * later supers, using BTRFS_SUPER_MIRROR_MAX instead
1488 for (i = 0; i < max_super; i++) {
1489 bytenr = btrfs_sb_offset(i);
1490 ret = pread64(fd, buf, BTRFS_SUPER_INFO_SIZE, bytenr);
1491 if (ret < BTRFS_SUPER_INFO_SIZE)
1494 if (btrfs_super_bytenr(buf) != bytenr )
1496 /* if magic is NULL, the device was removed */
1497 if (btrfs_super_magic(buf) == 0 && i == 0)
1499 if (check_super(buf))
1502 if (!fsid_is_initialized) {
1503 memcpy(fsid, buf->fsid, sizeof(fsid));
1504 fsid_is_initialized = 1;
1505 } else if (memcmp(fsid, buf->fsid, sizeof(fsid))) {
1507 * the superblocks (the original one and
1508 * its backups) contain data of different
1509 * filesystems -> the super cannot be trusted
1514 if (btrfs_super_generation(buf) > transid) {
1515 memcpy(sb, buf, BTRFS_SUPER_INFO_SIZE);
1516 transid = btrfs_super_generation(buf);
1520 return transid > 0 ? 0 : -1;
1523 static int write_dev_supers(struct btrfs_root *root,
1524 struct btrfs_super_block *sb,
1525 struct btrfs_device *device)
1531 if (root->fs_info->super_bytenr != BTRFS_SUPER_INFO_OFFSET) {
1532 btrfs_set_super_bytenr(sb, root->fs_info->super_bytenr);
1534 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
1535 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
1536 btrfs_csum_final(crc, (char *)&sb->csum[0]);
1539 * super_copy is BTRFS_SUPER_INFO_SIZE bytes and is
1540 * zero filled, we can use it directly
1542 ret = pwrite64(device->fd, root->fs_info->super_copy,
1543 BTRFS_SUPER_INFO_SIZE,
1544 root->fs_info->super_bytenr);
1545 if (ret != BTRFS_SUPER_INFO_SIZE)
1550 for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
1551 bytenr = btrfs_sb_offset(i);
1552 if (bytenr + BTRFS_SUPER_INFO_SIZE > device->total_bytes)
1555 btrfs_set_super_bytenr(sb, bytenr);
1558 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
1559 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
1560 btrfs_csum_final(crc, (char *)&sb->csum[0]);
1563 * super_copy is BTRFS_SUPER_INFO_SIZE bytes and is
1564 * zero filled, we can use it directly
1566 ret = pwrite64(device->fd, root->fs_info->super_copy,
1567 BTRFS_SUPER_INFO_SIZE, bytenr);
1568 if (ret != BTRFS_SUPER_INFO_SIZE)
1576 fprintf(stderr, "WARNING: failed to write all sb data\n");
1578 fprintf(stderr, "WARNING: failed to write sb: %s\n",
1583 int write_all_supers(struct btrfs_root *root)
1585 struct list_head *cur;
1586 struct list_head *head = &root->fs_info->fs_devices->devices;
1587 struct btrfs_device *dev;
1588 struct btrfs_super_block *sb;
1589 struct btrfs_dev_item *dev_item;
1593 sb = root->fs_info->super_copy;
1594 dev_item = &sb->dev_item;
1595 list_for_each(cur, head) {
1596 dev = list_entry(cur, struct btrfs_device, dev_list);
1597 if (!dev->writeable)
1600 btrfs_set_stack_device_generation(dev_item, 0);
1601 btrfs_set_stack_device_type(dev_item, dev->type);
1602 btrfs_set_stack_device_id(dev_item, dev->devid);
1603 btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes);
1604 btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used);
1605 btrfs_set_stack_device_io_align(dev_item, dev->io_align);
1606 btrfs_set_stack_device_io_width(dev_item, dev->io_width);
1607 btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
1608 memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
1609 memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE);
1611 flags = btrfs_super_flags(sb);
1612 btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);
1614 ret = write_dev_supers(root, sb, dev);
1620 int write_ctree_super(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root)
1624 struct btrfs_root *tree_root = root->fs_info->tree_root;
1625 struct btrfs_root *chunk_root = root->fs_info->chunk_root;
1627 if (root->fs_info->readonly)
1630 btrfs_set_super_generation(root->fs_info->super_copy,
1632 btrfs_set_super_root(root->fs_info->super_copy,
1633 tree_root->node->start);
1634 btrfs_set_super_root_level(root->fs_info->super_copy,
1635 btrfs_header_level(tree_root->node));
1636 btrfs_set_super_chunk_root(root->fs_info->super_copy,
1637 chunk_root->node->start);
1638 btrfs_set_super_chunk_root_level(root->fs_info->super_copy,
1639 btrfs_header_level(chunk_root->node));
1640 btrfs_set_super_chunk_root_generation(root->fs_info->super_copy,
1641 btrfs_header_generation(chunk_root->node));
1643 ret = write_all_supers(root);
1645 fprintf(stderr, "failed to write new super block err %d\n", ret);
1649 int close_ctree(struct btrfs_root *root)
1652 struct btrfs_trans_handle *trans;
1653 struct btrfs_fs_info *fs_info = root->fs_info;
1655 if (fs_info->last_trans_committed !=
1656 fs_info->generation) {
1657 trans = btrfs_start_transaction(root, 1);
1658 btrfs_commit_transaction(trans, root);
1659 trans = btrfs_start_transaction(root, 1);
1660 ret = commit_tree_roots(trans, fs_info);
1662 ret = __commit_transaction(trans, root);
1664 write_ctree_super(trans, root);
1665 btrfs_free_transaction(root, trans);
1667 btrfs_free_block_groups(fs_info);
1669 free_fs_roots_tree(&fs_info->fs_root_tree);
1671 btrfs_release_all_roots(fs_info);
1672 btrfs_close_devices(fs_info->fs_devices);
1673 btrfs_cleanup_all_caches(fs_info);
1674 btrfs_free_fs_info(fs_info);
1678 int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1679 struct extent_buffer *eb)
1681 return clear_extent_buffer_dirty(eb);
1684 int wait_on_tree_block_writeback(struct btrfs_root *root,
1685 struct extent_buffer *eb)
1690 void btrfs_mark_buffer_dirty(struct extent_buffer *eb)
1692 set_extent_buffer_dirty(eb);
1695 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
1699 ret = extent_buffer_uptodate(buf);
1703 ret = verify_parent_transid(buf->tree, buf, parent_transid, 1);
1707 int btrfs_set_buffer_uptodate(struct extent_buffer *eb)
1709 return set_extent_buffer_uptodate(eb);