diff options
| -rw-r--r-- | fs/btrfs/relocation.c | 119 |
1 files changed, 23 insertions, 96 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index c430f2f5be24..3dc7232aa038 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -1901,6 +1901,29 @@ again: BUG_ON(ret); /* + * Info qgroup to trace both subtrees. + * + * We must trace both trees. + * 1) Tree reloc subtree + * If not traced, we will leak data numbers + * 2) Fs subtree + * If not traced, we will double count old data + * and tree block numbers, if current trans doesn't free + * data reloc tree inode. + */ + ret = btrfs_qgroup_trace_subtree(trans, src, parent, + btrfs_header_generation(parent), + btrfs_header_level(parent)); + if (ret < 0) + break; + ret = btrfs_qgroup_trace_subtree(trans, dest, + path->nodes[level], + btrfs_header_generation(path->nodes[level]), + btrfs_header_level(path->nodes[level])); + if (ret < 0) + break; + + /* * swap blocks in fs tree and reloc tree. */ btrfs_set_node_blockptr(parent, slot, new_bytenr); @@ -3949,90 +3972,6 @@ int prepare_to_relocate(struct reloc_control *rc) return 0; } -/* - * Qgroup fixer for data chunk relocation. - * The data relocation is done in the following steps - * 1) Copy data extents into data reloc tree - * 2) Create tree reloc tree(special snapshot) for related subvolumes - * 3) Modify file extents in tree reloc tree - * 4) Merge tree reloc tree with original fs tree, by swapping tree blocks - * - * The problem is, data and tree reloc tree are not accounted to qgroup, - * and 4) will only info qgroup to track tree blocks change, not file extents - * in the tree blocks. - * - * The good news is, related data extents are all in data reloc tree, so we - * only need to info qgroup to track all file extents in data reloc tree - * before commit trans. - */ -static int qgroup_fix_relocated_data_extents(struct btrfs_trans_handle *trans, - struct reloc_control *rc) -{ - struct btrfs_fs_info *fs_info = rc->extent_root->fs_info; - struct inode *inode = rc->data_inode; - struct btrfs_root *data_reloc_root = BTRFS_I(inode)->root; - struct btrfs_path *path; - struct btrfs_key key; - int ret = 0; - - if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) - return 0; - - /* - * Only for stage where we update data pointers the qgroup fix is - * valid. - * For MOVING_DATA stage, we will miss the timing of swapping tree - * blocks, and won't fix it. - */ - if (!(rc->stage == UPDATE_DATA_PTRS && rc->extents_found)) - return 0; - - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - key.objectid = btrfs_ino(inode); - key.type = BTRFS_EXTENT_DATA_KEY; - key.offset = 0; - - ret = btrfs_search_slot(NULL, data_reloc_root, &key, path, 0, 0); - if (ret < 0) - goto out; - - lock_extent(&BTRFS_I(inode)->io_tree, 0, (u64)-1); - while (1) { - struct btrfs_file_extent_item *fi; - - btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); - if (key.objectid > btrfs_ino(inode)) - break; - if (key.type != BTRFS_EXTENT_DATA_KEY) - goto next; - fi = btrfs_item_ptr(path->nodes[0], path->slots[0], - struct btrfs_file_extent_item); - if (btrfs_file_extent_type(path->nodes[0], fi) != - BTRFS_FILE_EXTENT_REG) - goto next; - ret = btrfs_qgroup_trace_extent(trans, fs_info, - btrfs_file_extent_disk_bytenr(path->nodes[0], fi), - btrfs_file_extent_disk_num_bytes(path->nodes[0], fi), - GFP_NOFS); - if (ret < 0) - break; -next: - ret = btrfs_next_item(data_reloc_root, path); - if (ret < 0) - break; - if (ret > 0) { - ret = 0; - break; - } - } - unlock_extent(&BTRFS_I(inode)->io_tree, 0 , (u64)-1); -out: - btrfs_free_path(path); - return ret; -} - static noinline_for_stack int relocate_block_group(struct reloc_control *rc) { struct rb_root blocks = RB_ROOT; @@ -4223,13 +4162,6 @@ restart: err = PTR_ERR(trans); goto out_free; } - ret = qgroup_fix_relocated_data_extents(trans, rc); - if (ret < 0) { - btrfs_abort_transaction(trans, ret); - if (!err) - err = ret; - goto out_free; - } btrfs_commit_transaction(trans, rc->extent_root); out_free: btrfs_free_block_rsv(rc->extent_root, rc->block_rsv); @@ -4635,11 +4567,6 @@ int btrfs_recover_relocation(struct btrfs_root *root) err = PTR_ERR(trans); goto out_free; } - err = qgroup_fix_relocated_data_extents(trans, rc); - if (err < 0) { - btrfs_abort_transaction(trans, err); - goto out_free; - } err = btrfs_commit_transaction(trans, rc->extent_root); out_free: kfree(rc); |