diff options
| -rw-r--r-- | btrfstune.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/btrfstune.c b/btrfstune.c index 4ccd6d4c..77a8b7ac 100644 --- a/btrfstune.c +++ b/btrfstune.c @@ -219,6 +219,49 @@ static int change_device_uuid(struct btrfs_root *root, struct extent_buffer *eb, return ret; } +static int change_devices_uuid(struct btrfs_fs_info *fs_info) +{ + struct btrfs_root *root = fs_info->chunk_root; + struct btrfs_path *path; + struct btrfs_key key = {0, 0, 0}; + int ret = 0; + + /* + * Unlike change_extents_uuid, we only need to change fsid in dev_item + */ + if (!fs_info->new_fsid) + return 0; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + /* No transaction again */ + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret < 0) + goto out; + + while (1) { + btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); + if (key.type != BTRFS_DEV_ITEM_KEY || + key.objectid != BTRFS_DEV_ITEMS_OBJECTID) + goto next; + ret = change_device_uuid(root, path->nodes[0], path->slots[0]); + if (ret < 0) + goto out; +next: + ret = btrfs_next_item(root, path); + if (ret < 0) + goto out; + if (ret > 0) { + ret = 0; + goto out; + } + } +out: + btrfs_free_path(path); + return ret; +} + static void print_usage(void) { fprintf(stderr, "usage: btrfstune [options] device\n"); |