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_fs_info *fs_info = root->fs_info;
370 if (root->commit_root == root->node)
373 free_extent_buffer(root->commit_root);
374 root->commit_root = NULL;
376 btrfs_set_root_bytenr(&root->root_item, root->node->start);
377 btrfs_set_root_generation(&root->root_item, trans->transid);
378 root->root_item.level = btrfs_header_level(root->node);
379 ret = btrfs_update_root(trans, root->fs_info->tree_root,
380 &root->root_key, &root->root_item);
383 ret = commit_tree_roots(trans, fs_info);
385 ret = __commit_transaction(trans, root);
387 write_ctree_super(trans, root);
388 btrfs_finish_extent_commit(trans, fs_info->extent_root,
389 &fs_info->pinned_extents);
390 btrfs_free_transaction(root, trans);
391 free_extent_buffer(root->commit_root);
392 root->commit_root = NULL;
393 fs_info->running_transaction = NULL;
397 static int find_and_setup_root(struct btrfs_root *tree_root,
398 struct btrfs_fs_info *fs_info,
399 u64 objectid, struct btrfs_root *root)
405 __setup_root(tree_root->nodesize, tree_root->leafsize,
406 tree_root->sectorsize, tree_root->stripesize,
407 root, fs_info, objectid);
408 ret = btrfs_find_last_root(tree_root, objectid,
409 &root->root_item, &root->root_key);
412 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
413 generation = btrfs_root_generation(&root->root_item);
414 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
415 blocksize, generation);
420 static int find_and_setup_log_root(struct btrfs_root *tree_root,
421 struct btrfs_fs_info *fs_info,
422 struct btrfs_super_block *disk_super)
425 u64 blocknr = btrfs_super_log_root(disk_super);
426 struct btrfs_root *log_root = malloc(sizeof(struct btrfs_root));
431 blocksize = btrfs_level_size(tree_root,
432 btrfs_super_log_root_level(disk_super));
434 __setup_root(tree_root->nodesize, tree_root->leafsize,
435 tree_root->sectorsize, tree_root->stripesize,
436 log_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
438 log_root->node = read_tree_block(tree_root, blocknr,
440 btrfs_super_generation(disk_super) + 1);
442 fs_info->log_root_tree = log_root;
443 BUG_ON(!log_root->node);
448 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info,
449 struct btrfs_root *root)
452 free_extent_buffer(root->node);
453 if (root->commit_root)
454 free_extent_buffer(root->commit_root);
459 static int free_fs_roots(struct btrfs_fs_info *fs_info)
461 struct cache_extent *cache;
462 struct btrfs_root *root;
465 cache = find_first_cache_extent(&fs_info->fs_root_cache, 0);
468 root = container_of(cache, struct btrfs_root, cache);
469 remove_cache_extent(&fs_info->fs_root_cache, cache);
470 btrfs_free_fs_root(fs_info, root);
475 struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
476 struct btrfs_key *location)
478 struct btrfs_root *root;
479 struct btrfs_root *tree_root = fs_info->tree_root;
480 struct btrfs_path *path;
481 struct extent_buffer *l;
486 root = malloc(sizeof(*root));
488 return ERR_PTR(-ENOMEM);
489 memset(root, 0, sizeof(*root));
490 if (location->offset == (u64)-1) {
491 ret = find_and_setup_root(tree_root, fs_info,
492 location->objectid, root);
500 __setup_root(tree_root->nodesize, tree_root->leafsize,
501 tree_root->sectorsize, tree_root->stripesize,
502 root, fs_info, location->objectid);
504 path = btrfs_alloc_path();
506 ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0);
513 read_extent_buffer(l, &root->root_item,
514 btrfs_item_ptr_offset(l, path->slots[0]),
515 sizeof(root->root_item));
516 memcpy(&root->root_key, location, sizeof(*location));
519 btrfs_release_path(root, path);
520 btrfs_free_path(path);
525 generation = btrfs_root_generation(&root->root_item);
526 blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
527 root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
528 blocksize, generation);
535 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
536 struct btrfs_key *location)
538 struct btrfs_root *root;
539 struct cache_extent *cache;
542 if (location->objectid == BTRFS_ROOT_TREE_OBJECTID)
543 return fs_info->tree_root;
544 if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID)
545 return fs_info->extent_root;
546 if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID)
547 return fs_info->chunk_root;
548 if (location->objectid == BTRFS_DEV_TREE_OBJECTID)
549 return fs_info->dev_root;
550 if (location->objectid == BTRFS_CSUM_TREE_OBJECTID)
551 return fs_info->csum_root;
553 BUG_ON(location->objectid == BTRFS_TREE_RELOC_OBJECTID ||
554 location->offset != (u64)-1);
556 cache = find_cache_extent(&fs_info->fs_root_cache,
557 location->objectid, 1);
559 return container_of(cache, struct btrfs_root, cache);
561 root = btrfs_read_fs_root_no_cache(fs_info, location);
565 root->cache.start = location->objectid;
566 root->cache.size = 1;
567 ret = insert_existing_cache_extent(&fs_info->fs_root_cache,
573 struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes)
576 struct btrfs_root *root;
577 int flags = O_CREAT | O_RDWR;
582 fp = open(filename, flags, 0600);
584 fprintf (stderr, "Could not open %s\n", filename);
587 root = open_ctree_fd(fp, filename, sb_bytenr, writes);
593 struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
602 struct btrfs_key key;
603 struct btrfs_root *tree_root = malloc(sizeof(struct btrfs_root));
604 struct btrfs_root *extent_root = malloc(sizeof(struct btrfs_root));
605 struct btrfs_root *chunk_root = malloc(sizeof(struct btrfs_root));
606 struct btrfs_root *dev_root = malloc(sizeof(struct btrfs_root));
607 struct btrfs_root *csum_root = malloc(sizeof(struct btrfs_root));
608 struct btrfs_fs_info *fs_info = malloc(sizeof(*fs_info));
610 struct btrfs_super_block *disk_super;
611 struct btrfs_fs_devices *fs_devices = NULL;
616 sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
618 ret = btrfs_scan_one_device(fp, path, &fs_devices,
619 &total_devs, sb_bytenr);
622 fprintf(stderr, "No valid Btrfs found on %s\n", path);
626 if (total_devs != 1) {
627 ret = btrfs_scan_for_fsid(fs_devices, total_devs, 1);
631 memset(fs_info, 0, sizeof(*fs_info));
632 fs_info->tree_root = tree_root;
633 fs_info->extent_root = extent_root;
634 fs_info->chunk_root = chunk_root;
635 fs_info->dev_root = dev_root;
636 fs_info->csum_root = csum_root;
639 fs_info->readonly = 1;
641 extent_io_tree_init(&fs_info->extent_cache);
642 extent_io_tree_init(&fs_info->free_space_cache);
643 extent_io_tree_init(&fs_info->block_group_cache);
644 extent_io_tree_init(&fs_info->pinned_extents);
645 extent_io_tree_init(&fs_info->pending_del);
646 extent_io_tree_init(&fs_info->extent_ins);
647 cache_tree_init(&fs_info->fs_root_cache);
649 cache_tree_init(&fs_info->mapping_tree.cache_tree);
651 mutex_init(&fs_info->fs_mutex);
652 fs_info->fs_devices = fs_devices;
653 INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
654 INIT_LIST_HEAD(&fs_info->space_info);
656 __setup_root(4096, 4096, 4096, 4096, tree_root,
657 fs_info, BTRFS_ROOT_TREE_OBJECTID);
660 ret = btrfs_open_devices(fs_devices, O_RDWR);
662 ret = btrfs_open_devices(fs_devices, O_RDONLY);
665 fs_info->super_bytenr = sb_bytenr;
666 disk_super = &fs_info->super_copy;
667 ret = btrfs_read_dev_super(fs_devices->latest_bdev,
668 disk_super, sb_bytenr);
670 printk("No valid btrfs found\n");
674 memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
677 features = btrfs_super_incompat_flags(disk_super) &
678 ~BTRFS_FEATURE_INCOMPAT_SUPP;
680 printk("couldn't open because of unsupported "
681 "option features (%Lx).\n", features);
685 features = btrfs_super_incompat_flags(disk_super);
686 if (!(features & BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF)) {
687 features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF;
688 btrfs_set_super_incompat_flags(disk_super, features);
691 features = btrfs_super_compat_ro_flags(disk_super) &
692 ~BTRFS_FEATURE_COMPAT_RO_SUPP;
693 if (writes && features) {
694 printk("couldn't open RDWR because of unsupported "
695 "option features (%Lx).\n", features);
699 nodesize = btrfs_super_nodesize(disk_super);
700 leafsize = btrfs_super_leafsize(disk_super);
701 sectorsize = btrfs_super_sectorsize(disk_super);
702 stripesize = btrfs_super_stripesize(disk_super);
703 tree_root->nodesize = nodesize;
704 tree_root->leafsize = leafsize;
705 tree_root->sectorsize = sectorsize;
706 tree_root->stripesize = stripesize;
708 ret = btrfs_read_sys_array(tree_root);
710 blocksize = btrfs_level_size(tree_root,
711 btrfs_super_chunk_root_level(disk_super));
712 generation = btrfs_super_chunk_root_generation(disk_super);
714 __setup_root(nodesize, leafsize, sectorsize, stripesize,
715 chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
717 chunk_root->node = read_tree_block(chunk_root,
718 btrfs_super_chunk_root(disk_super),
719 blocksize, generation);
721 BUG_ON(!chunk_root->node);
723 read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
724 (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
727 if (!(btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_METADUMP)) {
728 ret = btrfs_read_chunk_tree(chunk_root);
732 blocksize = btrfs_level_size(tree_root,
733 btrfs_super_root_level(disk_super));
734 generation = btrfs_super_generation(disk_super);
736 tree_root->node = read_tree_block(tree_root,
737 btrfs_super_root(disk_super),
738 blocksize, generation);
739 BUG_ON(!tree_root->node);
740 ret = find_and_setup_root(tree_root, fs_info,
741 BTRFS_EXTENT_TREE_OBJECTID, extent_root);
743 extent_root->track_dirty = 1;
745 ret = find_and_setup_root(tree_root, fs_info,
746 BTRFS_DEV_TREE_OBJECTID, dev_root);
748 dev_root->track_dirty = 1;
750 ret = find_and_setup_root(tree_root, fs_info,
751 BTRFS_CSUM_TREE_OBJECTID, csum_root);
753 csum_root->track_dirty = 1;
757 find_and_setup_log_root(tree_root, fs_info, disk_super);
758 btrfs_read_block_groups(fs_info->tree_root);
760 key.objectid = BTRFS_FS_TREE_OBJECTID;
761 key.type = BTRFS_ROOT_ITEM_KEY;
762 key.offset = (u64)-1;
763 fs_info->fs_root = btrfs_read_fs_root(fs_info, &key);
765 fs_info->data_alloc_profile = (u64)-1;
766 fs_info->metadata_alloc_profile = (u64)-1;
767 fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
769 return fs_info->fs_root;
772 int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr)
774 struct btrfs_super_block buf;
780 if (sb_bytenr != BTRFS_SUPER_INFO_OFFSET) {
781 ret = pread64(fd, &buf, sizeof(buf), sb_bytenr);
782 if (ret < sizeof(buf))
785 if (btrfs_super_bytenr(&buf) != sb_bytenr ||
786 strncmp((char *)(&buf.magic), BTRFS_MAGIC,
790 memcpy(sb, &buf, sizeof(*sb));
794 for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
795 bytenr = btrfs_sb_offset(i);
796 ret = pread64(fd, &buf, sizeof(buf), bytenr);
797 if (ret < sizeof(buf))
800 if (btrfs_super_bytenr(&buf) != bytenr ||
801 strncmp((char *)(&buf.magic), BTRFS_MAGIC,
805 if (btrfs_super_generation(&buf) > transid) {
806 memcpy(sb, &buf, sizeof(*sb));
807 transid = btrfs_super_generation(&buf);
811 return transid > 0 ? 0 : -1;
814 int write_dev_supers(struct btrfs_root *root, struct btrfs_super_block *sb,
815 struct btrfs_device *device)
821 if (root->fs_info->super_bytenr != BTRFS_SUPER_INFO_OFFSET) {
822 btrfs_set_super_bytenr(sb, root->fs_info->super_bytenr);
825 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
826 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
827 btrfs_csum_final(crc, (char *)&sb->csum[0]);
829 ret = pwrite64(device->fd, sb, BTRFS_SUPER_INFO_SIZE,
830 root->fs_info->super_bytenr);
831 BUG_ON(ret != BTRFS_SUPER_INFO_SIZE);
835 for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
836 bytenr = btrfs_sb_offset(i);
837 if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes)
840 btrfs_set_super_bytenr(sb, bytenr);
843 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
844 BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
845 btrfs_csum_final(crc, (char *)&sb->csum[0]);
847 ret = pwrite64(device->fd, sb, BTRFS_SUPER_INFO_SIZE, bytenr);
848 BUG_ON(ret != BTRFS_SUPER_INFO_SIZE);
853 int write_all_supers(struct btrfs_root *root)
855 struct list_head *cur;
856 struct list_head *head = &root->fs_info->fs_devices->devices;
857 struct btrfs_device *dev;
858 struct btrfs_super_block *sb;
859 struct btrfs_dev_item *dev_item;
863 sb = &root->fs_info->super_copy;
864 dev_item = &sb->dev_item;
865 list_for_each(cur, head) {
866 dev = list_entry(cur, struct btrfs_device, dev_list);
870 btrfs_set_stack_device_generation(dev_item, 0);
871 btrfs_set_stack_device_type(dev_item, dev->type);
872 btrfs_set_stack_device_id(dev_item, dev->devid);
873 btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes);
874 btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used);
875 btrfs_set_stack_device_io_align(dev_item, dev->io_align);
876 btrfs_set_stack_device_io_width(dev_item, dev->io_width);
877 btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
878 memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
879 memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE);
881 flags = btrfs_super_flags(sb);
882 btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);
884 ret = write_dev_supers(root, sb, dev);
890 int write_ctree_super(struct btrfs_trans_handle *trans,
891 struct btrfs_root *root)
894 struct btrfs_root *tree_root = root->fs_info->tree_root;
895 struct btrfs_root *chunk_root = root->fs_info->chunk_root;
897 if (root->fs_info->readonly)
900 btrfs_set_super_generation(&root->fs_info->super_copy,
902 btrfs_set_super_root(&root->fs_info->super_copy,
903 tree_root->node->start);
904 btrfs_set_super_root_level(&root->fs_info->super_copy,
905 btrfs_header_level(tree_root->node));
906 btrfs_set_super_chunk_root(&root->fs_info->super_copy,
907 chunk_root->node->start);
908 btrfs_set_super_chunk_root_level(&root->fs_info->super_copy,
909 btrfs_header_level(chunk_root->node));
910 btrfs_set_super_chunk_root_generation(&root->fs_info->super_copy,
911 btrfs_header_generation(chunk_root->node));
913 ret = write_all_supers(root);
915 fprintf(stderr, "failed to write new super block err %d\n", ret);
919 static int close_all_devices(struct btrfs_fs_info *fs_info)
921 struct list_head *list;
922 struct list_head *next;
923 struct btrfs_device *device;
927 list = &fs_info->fs_devices->devices;
928 list_for_each(next, list) {
929 device = list_entry(next, struct btrfs_device, dev_list);
935 int close_ctree(struct btrfs_root *root)
938 struct btrfs_trans_handle *trans;
939 struct btrfs_fs_info *fs_info = root->fs_info;
941 trans = btrfs_start_transaction(root, 1);
942 btrfs_commit_transaction(trans, root);
943 trans = btrfs_start_transaction(root, 1);
944 ret = commit_tree_roots(trans, fs_info);
946 ret = __commit_transaction(trans, root);
948 write_ctree_super(trans, root);
949 btrfs_free_transaction(root, trans);
950 btrfs_free_block_groups(fs_info);
952 free_fs_roots(fs_info);
954 if (fs_info->extent_root->node)
955 free_extent_buffer(fs_info->extent_root->node);
956 if (fs_info->tree_root->node)
957 free_extent_buffer(fs_info->tree_root->node);
958 if (fs_info->chunk_root->node)
959 free_extent_buffer(fs_info->chunk_root->node);
960 if (fs_info->dev_root->node)
961 free_extent_buffer(fs_info->dev_root->node);
962 if (fs_info->csum_root->node)
963 free_extent_buffer(fs_info->csum_root->node);
965 if (root->fs_info->log_root_tree) {
966 if (root->fs_info->log_root_tree->node)
967 free_extent_buffer(root->fs_info->log_root_tree->node);
968 free(root->fs_info->log_root_tree);
971 close_all_devices(root->fs_info);
972 extent_io_tree_cleanup(&fs_info->extent_cache);
973 extent_io_tree_cleanup(&fs_info->free_space_cache);
974 extent_io_tree_cleanup(&fs_info->block_group_cache);
975 extent_io_tree_cleanup(&fs_info->pinned_extents);
976 extent_io_tree_cleanup(&fs_info->pending_del);
977 extent_io_tree_cleanup(&fs_info->extent_ins);
979 free(fs_info->tree_root);
980 free(fs_info->extent_root);
981 free(fs_info->chunk_root);
982 free(fs_info->dev_root);
983 free(fs_info->csum_root);
989 int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
990 struct extent_buffer *eb)
992 return clear_extent_buffer_dirty(eb);
995 int wait_on_tree_block_writeback(struct btrfs_root *root,
996 struct extent_buffer *eb)
1001 void btrfs_mark_buffer_dirty(struct extent_buffer *eb)
1003 set_extent_buffer_dirty(eb);
1006 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
1010 ret = extent_buffer_uptodate(buf);
1014 ret = verify_parent_transid(buf->tree, buf, parent_transid);
1018 int btrfs_set_buffer_uptodate(struct extent_buffer *eb)
1020 return set_extent_buffer_uptodate(eb);