diff options
Diffstat (limited to 'ctree.c')
| -rw-r--r-- | ctree.c | 40 |
1 files changed, 40 insertions, 0 deletions
@@ -138,6 +138,46 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans, return 0; } +int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, + struct btrfs_root *root) +{ + struct extent_buffer *c; + struct extent_buffer *old = root->node; + int level; + struct btrfs_disk_key disk_key = {0,0,0}; + + level = 0; + + c = btrfs_alloc_free_block(trans, root, + btrfs_level_size(root, 0), + root->root_key.objectid, + &disk_key, level, 0, 0); + if (IS_ERR(c)) + return PTR_ERR(c); + + memset_extent_buffer(c, 0, 0, sizeof(struct btrfs_header)); + btrfs_set_header_level(c, level); + btrfs_set_header_bytenr(c, c->start); + btrfs_set_header_generation(c, trans->transid); + btrfs_set_header_backref_rev(c, BTRFS_MIXED_BACKREF_REV); + btrfs_set_header_owner(c, root->root_key.objectid); + + write_extent_buffer(c, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(c), + BTRFS_FSID_SIZE); + + write_extent_buffer(c, root->fs_info->chunk_tree_uuid, + (unsigned long)btrfs_header_chunk_tree_uuid(c), + BTRFS_UUID_SIZE); + + btrfs_mark_buffer_dirty(c); + + free_extent_buffer(old); + root->node = c; + add_root_to_dirty_list(root); + return 0; +} + /* * check if the tree block can be shared by multiple trees */ |