diff options
Diffstat (limited to 'fs/btrfs/free-space-tree.c')
| -rw-r--r-- | fs/btrfs/free-space-tree.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c index 4d155a48ec59..b21da1446f2a 100644 --- a/fs/btrfs/free-space-tree.c +++ b/fs/btrfs/free-space-tree.c @@ -1252,7 +1252,7 @@ out: return ret; } -int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info) +int btrfs_delete_free_space_tree(struct btrfs_fs_info *fs_info) { struct btrfs_trans_handle *trans; struct btrfs_root *tree_root = fs_info->tree_root; @@ -1298,6 +1298,54 @@ abort: return ret; } +int btrfs_rebuild_free_space_tree(struct btrfs_fs_info *fs_info) +{ + struct btrfs_trans_handle *trans; + struct btrfs_key key = { + .objectid = BTRFS_FREE_SPACE_TREE_OBJECTID, + .type = BTRFS_ROOT_ITEM_KEY, + .offset = 0, + }; + struct btrfs_root *free_space_root = btrfs_global_root(fs_info, &key); + struct rb_node *node; + int ret; + + trans = btrfs_start_transaction(free_space_root, 1); + if (IS_ERR(trans)) + return PTR_ERR(trans); + + set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags); + set_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags); + + ret = clear_free_space_tree(trans, free_space_root); + if (ret) + goto abort; + + node = rb_first_cached(&fs_info->block_group_cache_tree); + while (node) { + struct btrfs_block_group *block_group; + + block_group = rb_entry(node, struct btrfs_block_group, + cache_node); + ret = populate_free_space_tree(trans, block_group); + if (ret) + goto abort; + node = rb_next(node); + } + + btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE); + btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID); + clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags); + + ret = btrfs_commit_transaction(trans); + clear_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags); + return ret; +abort: + btrfs_abort_transaction(trans, ret); + btrfs_end_transaction(trans); + return ret; +} + static int __add_block_group_free_space(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct btrfs_path *path) |