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)
41 struct btrfs_fs_devices *fs_devices;
44 if (buf->start != btrfs_header_bytenr(buf))
47 fs_devices = root->fs_info->fs_devices;
49 if (!memcmp_extent_buffer(buf, fs_devices->fsid,
50 (unsigned long)btrfs_header_fsid(buf),
55 fs_devices = fs_devices->seed;
60 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len)
62 return crc32c(seed, data, len);
65 void btrfs_csum_final(u32 crc, char *result)
67 *(__le32 *)result = ~cpu_to_le32(crc);
70 int csum_tree_block_size(struct extent_buffer *buf, u16 csum_size,
77 result = malloc(csum_size * sizeof(char));
81 len = buf->len - BTRFS_CSUM_SIZE;
82 crc = crc32c(crc, buf->data + BTRFS_CSUM_SIZE, len);
83 btrfs_csum_final(crc, result);
86 if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
87 printk("checksum verify failed on %llu wanted %X "
88 "found %X\n", (unsigned long long)buf->start,
89 *((int *)result), *((int *)buf));
94 write_extent_buffer(buf, result, 0, csum_size);
100 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
104 btrfs_super_csum_size(&root->fs_info->super_copy);
105 return csum_tree_block_size(buf, csum_size, verify);
108 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
109 u64 bytenr, u32 blocksize)
111 return find_extent_buffer(&root->fs_info->extent_cache,
115 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
116 u64 bytenr, u32 blocksize)
118 return alloc_extent_buffer(&root->fs_info->extent_cache, bytenr,
122 int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
127 struct extent_buffer *eb;
129 struct btrfs_multi_bio *multi = NULL;
130 struct btrfs_device *device;
132 eb = btrfs_find_tree_block(root, bytenr, blocksize);
133 if (eb && btrfs_buffer_uptodate(eb, parent_transid)) {
134 free_extent_buffer(eb);
140 ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
141 bytenr, &length, &multi, 0);
143 device = multi->stripes[0].dev;
145 blocksize = min(blocksize, (u32)(64 * 1024));
146 readahead(device->fd, multi->stripes[0].physical, blocksize);
151 static int verify_parent_transid(struct extent_io_tree *io_tree,
152 struct extent_buffer *eb, u64 parent_transid)
156 if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
159 if (extent_buffer_uptodate(eb) &&
160 btrfs_header_generation(eb) == parent_transid) {
164 printk("parent transid verify failed on %llu wanted %llu found %llu\n",
165 (unsigned long long)eb->start,
166 (unsigned long long)parent_transid,
167 (unsigned long long)btrfs_header_generation(eb));
170 clear_extent_buffer_uptodate(io_tree, eb);
176 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
177 u32 blocksize, u64 parent_transid)
181 struct extent_buffer *eb;
183 struct btrfs_multi_bio *multi = NULL;
184 struct btrfs_device *device;
188 eb = btrfs_find_create_tree_block(root, bytenr, blocksize);
192 if (btrfs_buffer_uptodate(eb, parent_transid))
198 ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
199 eb->start, &length, &multi, mirror_num);
201 device = multi->stripes[0].dev;
204 eb->dev_bytenr = multi->stripes[0].physical;
206 ret = read_extent_from_disk(eb);
207 if (ret == 0 && check_tree_block(root, eb) == 0 &&
208 csum_tree_block(root, eb, 1) == 0 &&
209 verify_parent_transid(eb->tree, eb, parent_transid) == 0) {
210 btrfs_set_buffer_uptodate(eb);
213 num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
215 if (num_copies == 1) {
219 if (mirror_num > num_copies) {
223 free_extent_buffer(eb);
227 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
228 struct extent_buffer *eb)
233 struct btrfs_multi_bio *multi = NULL;
235 if (check_tree_block(root, eb))
237 if (!btrfs_buffer_uptodate(eb, trans->transid))
240 btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
241 csum_tree_block(root, eb, 0);
245 ret = btrfs_map_block(&root->fs_info->mapping_tree, WRITE,
246 eb->start, &length, &multi, 0);
248 while(dev_nr < multi->num_stripes) {
250 eb->fd = multi->stripes[dev_nr].dev->fd;
251 eb->dev_bytenr = multi->stripes[dev_nr].physical;
252 multi->stripes[dev_nr].dev->total_ios++;
254 ret = write_extent_to_disk(eb);
261 static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
262 u32 stripesize, struct btrfs_root *root,
263 struct btrfs_fs_info *fs_info, u64 objectid)
266 root->commit_root = NULL;
267 root->sectorsize = sectorsize;
268 root->nodesize = nodesize;
269 root->leafsize = leafsize;
270 root->stripesize = stripesize;
272 root->track_dirty = 0;
274 root->fs_info = fs_info;
275 root->objectid = objectid;
276 root->last_trans = 0;
277 root->highest_inode = 0;
278 root->last_inode_alloc = 0;
280 INIT_LIST_HEAD(&root->dirty_list);
281 memset(&root->root_key, 0, sizeof(root->root_key));
282 memset(&root->root_item, 0, sizeof(root->root_item));
283 root->root_key.objectid = objectid;
287 static int update_cowonly_root(struct btrfs_trans_handle *trans,
288 struct btrfs_root *root)
292 struct btrfs_root *tree_root = root->fs_info->tree_root;
294 btrfs_write_dirty_block_groups(trans, root);
296 old_root_bytenr = btrfs_root_bytenr(&root->root_item);
297 if (old_root_bytenr == root->node->start)
299 btrfs_set_root_bytenr(&root->root_item,
301 btrfs_set_root_generation(&root->root_item,
303 root->root_item.level = btrfs_header_level(root->node);
304 ret = btrfs_update_root(trans, tree_root,
308 btrfs_write_dirty_block_groups(trans, root);
313 static int commit_tree_roots(struct btrfs_trans_handle *trans,
314 struct btrfs_fs_info *fs_info)
316 struct btrfs_root *root;
317 struct list_head *next;
318 struct extent_buffer *eb;
320 if (fs_info->readonly)
323 eb = fs_info->tree_root->node;
324 extent_buffer_get(eb);
325 btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb);
326 free_extent_buffer(eb);
328 while(!list_empty(&fs_info->dirty_cowonly_roots)) {
329 next = fs_info->dirty_cowonly_roots.next;
331 root = list_entry(next, struct btrfs_root, dirty_list);
332 update_cowonly_root(trans, root);
337 static int __commit_transaction(struct btrfs_trans_handle *trans,
338 struct btrfs_root *root)
342 struct extent_buffer *eb;
343 struct extent_io_tree *tree = &root->fs_info->extent_cache;
347 ret = find_first_extent_bit(tree, 0, &start, &end,
351 while(start <= end) {
352 eb = find_first_extent_buffer(tree, start);
353 BUG_ON(!eb || eb->start != start);
354 ret = write_tree_block(trans, root, eb);
357 clear_extent_buffer_dirty(eb);
358 free_extent_buffer(eb);
364 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
365 struct btrfs_root *root)
368 struct btrfs_root *new_root = NULL;
369 struct btrfs_fs_info *fs_info = root->fs_info;
371 if (root->commit_root == root->node)
374 new_root = malloc(sizeof(*new_root));
377 memcpy(new_root, root, sizeof(*new_root));
378 new_root->node = root->commit_root;
379 root->commit_root = NULL;
381 root->root_key.offset = trans->transid;
382 btrfs_set_root_bytenr(&root->root_item, root->node->start);
383 btrfs_set_root_generation(&root->root_item, root->root_key.offset);
384 root->root_item.level = btrfs_header_level(root->node);
385 ret = btrfs_insert_root(trans, fs_info->tree_root,
386 &root->root_key, &root->root_item);
389 btrfs_set_root_refs(&new_root->root_item, 0);
390 ret = btrfs_update_root(trans, root->fs_info->tree_root,
391 &new_root->root_key, &new_root->root_item);
394 ret = commit_tree_roots(trans, fs_info);
396 ret = __commit_transaction(trans, root);
398 write_ctree_super(trans, root);
399 btrfs_finish_extent_commit(trans, fs_info->extent_root,
400 &fs_info->pinned_extents);
401 btrfs_free_transaction(root, trans);
402 fs_info->running_transaction = NULL;
404 trans = btrfs_start_transaction(root, 1);
405 ret = btrfs_drop_snapshot(trans, new_root);
407 ret = btrfs_del_root(trans, fs_info->tree_root, &new_root->root_key);
410 ret = commit_tree_roots(trans, fs_info);
412 ret = __commit_transaction(trans, root);
414 write_ctree_super(trans, root);
415 btrfs_finish_extent_commit(trans, fs_info->extent_root,
416 &fs_info->pinned_extents);
417 btrfs_free_transaction(root, trans);
418 free_extent_buffer(root->commit_root);
419 root->commit_root = NULL;
420 fs_info->running_transaction = NULL;
422 free_extent_buffer(new_root->node);
428 static int find_and_setup_root(struct btrfs_root *tree_root,
429 struct btrfs_fs_info *fs_info,
430 u64 objectid, struct btrfs_root *root)
436 __setup_root(tree_root->nodesize, tree_root->leafsize,
437 tree_root->sectorsize, tree_root->stripesize,
438 root, fs_info, objectid);
439 ret = btrfs_find_last_root(tree_root, objectid,
440 &root->root_item, &root->root_key);
443 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
444 generation = btrfs_root_generation(&root->root_item);
445 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
446 blocksize, generation);
451 static int find_and_setup_log_root(struct btrfs_root *tree_root,
452 struct btrfs_fs_info *fs_info,
453 struct btrfs_super_block *disk_super)
456 u64 blocknr = btrfs_super_log_root(disk_super);
457 struct btrfs_root *log_root = malloc(sizeof(struct btrfs_root));
462 blocksize = btrfs_level_size(tree_root,
463 btrfs_super_log_root_level(disk_super));
465 __setup_root(tree_root->nodesize, tree_root->leafsize,
466 tree_root->sectorsize, tree_root->stripesize,
467 log_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
469 log_root->node = read_tree_block(tree_root, blocknr,
471 btrfs_super_generation(disk_super) + 1);
473 fs_info->log_root_tree = log_root;
474 BUG_ON(!log_root->node);
478 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
481 free_extent_buffer(root->node);
482 if (root->commit_root)
483 free_extent_buffer(root->commit_root);
489 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
490 struct btrfs_key *location)
492 struct btrfs_root *root;
493 struct btrfs_root *tree_root = fs_info->tree_root;
494 struct btrfs_path *path;
495 struct extent_buffer *l;
500 root = malloc(sizeof(*root));
502 return ERR_PTR(-ENOMEM);
503 memset(root, 0, sizeof(*root));
504 if (location->offset == (u64)-1) {
505 ret = find_and_setup_root(tree_root, fs_info,
506 location->objectid, root);
514 __setup_root(tree_root->nodesize, tree_root->leafsize,
515 tree_root->sectorsize, tree_root->stripesize,
516 root, fs_info, location->objectid);
518 path = btrfs_alloc_path();
520 ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0);
527 read_extent_buffer(l, &root->root_item,
528 btrfs_item_ptr_offset(l, path->slots[0]),
529 sizeof(root->root_item));
530 memcpy(&root->root_key, location, sizeof(*location));
533 btrfs_release_path(root, path);
534 btrfs_free_path(path);
539 generation = btrfs_root_generation(&root->root_item);
540 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
541 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
542 blocksize, generation);
549 struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes)
552 struct btrfs_root *root;
553 int flags = O_CREAT | O_RDWR;
558 fp = open(filename, flags, 0600);
560 fprintf (stderr, "Could not open %s\n", filename);
563 root = open_ctree_fd(fp, filename, sb_bytenr, writes);
569 struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
578 struct btrfs_root *root = malloc(sizeof(struct btrfs_root));
579 struct btrfs_root *tree_root = malloc(sizeof(struct btrfs_root));
580 struct btrfs_root *extent_root = malloc(sizeof(struct btrfs_root));
581 struct btrfs_root *chunk_root = malloc(sizeof(struct btrfs_root));
582 struct btrfs_root *dev_root = malloc(sizeof(struct btrfs_root));
583 struct btrfs_root *csum_root = malloc(sizeof(struct btrfs_root));
584 struct btrfs_fs_info *fs_info = malloc(sizeof(*fs_info));
586 struct btrfs_super_block *disk_super;
587 struct btrfs_fs_devices *fs_devices = NULL;
591 sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
593 ret = btrfs_scan_one_device(fp, path, &fs_devices,
594 &total_devs, sb_bytenr);
597 fprintf(stderr, "No valid Btrfs found on %s\n", path);
601 if (total_devs != 1) {
602 ret = btrfs_scan_for_fsid(fs_devices, total_devs, 1);
606 memset(fs_info, 0, sizeof(*fs_info));
607 fs_info->fs_root = root;
608 fs_info->tree_root = tree_root;
609 fs_info->extent_root = extent_root;
610 fs_info->chunk_root = chunk_root;
611 fs_info->dev_root = dev_root;
612 fs_info->csum_root = csum_root;
615 fs_info->readonly = 1;
617 extent_io_tree_init(&fs_info->extent_cache);
618 extent_io_tree_init(&fs_info->free_space_cache);
619 extent_io_tree_init(&fs_info->block_group_cache);
620 extent_io_tree_init(&fs_info->pinned_extents);
621 extent_io_tree_init(&fs_info->pending_del);
622 extent_io_tree_init(&fs_info->extent_ins);
624 cache_tree_init(&fs_info->mapping_tree.cache_tree);
626 mutex_init(&fs_info->fs_mutex);
627 fs_info->fs_devices = fs_devices;
628 INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
629 INIT_LIST_HEAD(&fs_info->space_info);
631 __setup_root(4096, 4096, 4096, 4096, tree_root,
632 fs_info, BTRFS_ROOT_TREE_OBJECTID);
635 ret = btrfs_open_devices(fs_devices, O_RDWR);
637 ret = btrfs_open_devices(fs_devices, O_RDONLY);
640 fs_info->super_bytenr = sb_bytenr;
641 disk_super = &fs_info->super_copy;
642 ret = btrfs_read_dev_super(fs_devices->latest_bdev,
643 disk_super, sb_bytenr);
645 printk("No valid btrfs found\n");
649 memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
651 nodesize = btrfs_super_nodesize(disk_super);
652 leafsize = btrfs_super_leafsize(disk_super);
653 sectorsize = btrfs_super_sectorsize(disk_super);
654 stripesize = btrfs_super_stripesize(disk_super);
655 tree_root->nodesize = nodesize;
656 tree_root->leafsize = leafsize;
657 tree_root->sectorsize = sectorsize;
658 tree_root->stripesize = stripesize;
660 ret = btrfs_read_sys_array(tree_root);
662 blocksize = btrfs_level_size(tree_root,
663 btrfs_super_chunk_root_level(disk_super));
664 generation = btrfs_super_chunk_root_generation(disk_super);
666 __setup_root(nodesize, leafsize, sectorsize, stripesize,
667 chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
669 chunk_root->node = read_tree_block(chunk_root,
670 btrfs_super_chunk_root(disk_super),
671 blocksize, generation);
673 BUG_ON(!chunk_root->node);
675 read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
676 (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
679 if (!(btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_METADUMP)) {
680 ret = btrfs_read_chunk_tree(chunk_root);
684 blocksize = btrfs_level_size(tree_root,
685 btrfs_super_root_level(disk_super));
686 generation = btrfs_super_generation(disk_super);
688 tree_root->node = read_tree_block(tree_root,
689 btrfs_super_root(disk_super),
690 blocksize, generation);
691 BUG_ON(!tree_root->node);
692 ret = find_and_setup_root(tree_root, fs_info,
693 BTRFS_EXTENT_TREE_OBJECTID, extent_root);
695 extent_root->track_dirty = 1;
697 ret = find_and_setup_root(tree_root, fs_info,
698 BTRFS_DEV_TREE_OBJECTID, dev_root);
700 dev_root->track_dirty = 1;
702 ret = find_and_setup_root(tree_root, fs_info,
703 BTRFS_CSUM_TREE_OBJECTID, csum_root);
705 csum_root->track_dirty = 1;
707 ret = find_and_setup_root(tree_root, fs_info,
708 BTRFS_FS_TREE_OBJECTID, root);
712 find_and_setup_log_root(tree_root, fs_info, disk_super);
713 btrfs_read_block_groups(root);
715 fs_info->data_alloc_profile = (u64)-1;
716 fs_info->metadata_alloc_profile = (u64)-1;
717 fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
722 int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr)
724 struct btrfs_super_block buf;
730 if (sb_bytenr != BTRFS_SUPER_INFO_OFFSET) {
731 ret = pread64(fd, &buf, sizeof(buf), sb_bytenr);
732 if (ret < sizeof(buf))
735 if (btrfs_super_bytenr(&buf) != sb_bytenr ||
736 strncmp((char *)(&buf.magic), BTRFS_MAGIC,
740 memcpy(sb, &buf, sizeof(*sb));
744 for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
745 bytenr = btrfs_sb_offset(i);
746 ret = pread64(fd, &buf, sizeof(buf), bytenr);
747 if (ret < sizeof(buf))
750 if (btrfs_super_bytenr(&buf) != bytenr ||
751 strncmp((char *)(&buf.magic), BTRFS_MAGIC,
755 if (btrfs_super_generation(&buf) > transid) {
756 memcpy(sb, &buf, sizeof(*sb));
757 transid = btrfs_super_generation(&buf);
761 return transid > 0 ? 0 : -1;
764 int write_dev_supers(struct btrfs_root *root, struct btrfs_super_block *sb,
765 struct btrfs_device *device)
771 if (root->fs_info->super_bytenr != BTRFS_SUPER_INFO_OFFSET) {
772 btrfs_set_super_bytenr(sb, root->fs_info->super_bytenr);
775 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
776 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
777 btrfs_csum_final(crc, (char *)&sb->csum[0]);
779 ret = pwrite64(device->fd, sb, BTRFS_SUPER_INFO_SIZE,
780 root->fs_info->super_bytenr);
781 BUG_ON(ret != BTRFS_SUPER_INFO_SIZE);
785 for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
786 bytenr = btrfs_sb_offset(i);
787 if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes)
790 btrfs_set_super_bytenr(sb, bytenr);
793 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
794 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
795 btrfs_csum_final(crc, (char *)&sb->csum[0]);
797 ret = pwrite64(device->fd, sb, BTRFS_SUPER_INFO_SIZE, bytenr);
798 BUG_ON(ret != BTRFS_SUPER_INFO_SIZE);
803 int write_all_supers(struct btrfs_root *root)
805 struct list_head *cur;
806 struct list_head *head = &root->fs_info->fs_devices->devices;
807 struct btrfs_device *dev;
808 struct btrfs_super_block *sb;
809 struct btrfs_dev_item *dev_item;
813 sb = &root->fs_info->super_copy;
814 dev_item = &sb->dev_item;
815 list_for_each(cur, head) {
816 dev = list_entry(cur, struct btrfs_device, dev_list);
820 btrfs_set_stack_device_generation(dev_item, 0);
821 btrfs_set_stack_device_type(dev_item, dev->type);
822 btrfs_set_stack_device_id(dev_item, dev->devid);
823 btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes);
824 btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used);
825 btrfs_set_stack_device_io_align(dev_item, dev->io_align);
826 btrfs_set_stack_device_io_width(dev_item, dev->io_width);
827 btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
828 memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
829 memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE);
831 flags = btrfs_super_flags(sb);
832 btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);
834 ret = write_dev_supers(root, sb, dev);
840 int write_ctree_super(struct btrfs_trans_handle *trans,
841 struct btrfs_root *root)
844 struct btrfs_root *tree_root = root->fs_info->tree_root;
845 struct btrfs_root *chunk_root = root->fs_info->chunk_root;
847 if (root->fs_info->readonly)
850 btrfs_set_super_generation(&root->fs_info->super_copy,
852 btrfs_set_super_root(&root->fs_info->super_copy,
853 tree_root->node->start);
854 btrfs_set_super_root_level(&root->fs_info->super_copy,
855 btrfs_header_level(tree_root->node));
856 btrfs_set_super_chunk_root(&root->fs_info->super_copy,
857 chunk_root->node->start);
858 btrfs_set_super_chunk_root_level(&root->fs_info->super_copy,
859 btrfs_header_level(chunk_root->node));
860 btrfs_set_super_chunk_root_generation(&root->fs_info->super_copy,
861 btrfs_header_generation(chunk_root->node));
863 ret = write_all_supers(root);
865 fprintf(stderr, "failed to write new super block err %d\n", ret);
869 static int close_all_devices(struct btrfs_fs_info *fs_info)
871 struct list_head *list;
872 struct list_head *next;
873 struct btrfs_device *device;
877 list = &fs_info->fs_devices->devices;
878 list_for_each(next, list) {
879 device = list_entry(next, struct btrfs_device, dev_list);
885 int close_ctree(struct btrfs_root *root)
888 struct btrfs_trans_handle *trans;
889 struct btrfs_fs_info *fs_info = root->fs_info;
891 trans = btrfs_start_transaction(root, 1);
892 btrfs_commit_transaction(trans, root);
893 trans = btrfs_start_transaction(root, 1);
894 ret = commit_tree_roots(trans, root->fs_info);
896 ret = __commit_transaction(trans, root);
898 write_ctree_super(trans, root);
899 btrfs_free_transaction(root, trans);
900 btrfs_free_block_groups(root->fs_info);
902 free_extent_buffer(root->node);
903 if (root->fs_info->extent_root->node)
904 free_extent_buffer(root->fs_info->extent_root->node);
905 if (root->fs_info->tree_root->node)
906 free_extent_buffer(root->fs_info->tree_root->node);
907 free_extent_buffer(root->commit_root);
909 if (root->fs_info->chunk_root->node)
910 free_extent_buffer(root->fs_info->chunk_root->node);
911 if (root->fs_info->dev_root->node)
912 free_extent_buffer(root->fs_info->dev_root->node);
913 if (root->fs_info->csum_root->node)
914 free_extent_buffer(root->fs_info->csum_root->node);
916 if (root->fs_info->log_root_tree) {
917 if (root->fs_info->log_root_tree->node)
918 free_extent_buffer(root->fs_info->log_root_tree->node);
919 free(root->fs_info->log_root_tree);
922 close_all_devices(root->fs_info);
923 extent_io_tree_cleanup(&fs_info->extent_cache);
924 extent_io_tree_cleanup(&fs_info->free_space_cache);
925 extent_io_tree_cleanup(&fs_info->block_group_cache);
926 extent_io_tree_cleanup(&fs_info->pinned_extents);
927 extent_io_tree_cleanup(&fs_info->pending_del);
928 extent_io_tree_cleanup(&fs_info->extent_ins);
930 free(fs_info->tree_root);
931 free(fs_info->extent_root);
932 free(fs_info->fs_root);
933 free(fs_info->chunk_root);
934 free(fs_info->dev_root);
935 free(fs_info->csum_root);
941 int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
942 struct extent_buffer *eb)
944 return clear_extent_buffer_dirty(eb);
947 int wait_on_tree_block_writeback(struct btrfs_root *root,
948 struct extent_buffer *eb)
953 void btrfs_mark_buffer_dirty(struct extent_buffer *eb)
955 set_extent_buffer_dirty(eb);
958 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
962 ret = extent_buffer_uptodate(buf);
966 ret = verify_parent_transid(buf->tree, buf, parent_transid);
970 int btrfs_set_buffer_uptodate(struct extent_buffer *eb)
972 return set_extent_buffer_uptodate(eb);