diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.c | 43 | ||||
| -rw-r--r-- | fs/btrfs/ctree.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/scrub.c | 3 |
3 files changed, 46 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 9e9de68eb813..30f5b11d7dd3 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -5955,3 +5955,46 @@ int btrfs_previous_item(struct btrfs_root *root, } return 1; } + +/* + * search in extent tree to find a previous Metadata/Data extent item with + * min objecitd. + * + * returns 0 if something is found, 1 if nothing was found and < 0 on error + */ +int btrfs_previous_extent_item(struct btrfs_root *root, + struct btrfs_path *path, u64 min_objectid) +{ + struct btrfs_key found_key; + struct extent_buffer *leaf; + u32 nritems; + int ret; + + while (1) { + if (path->slots[0] == 0) { + btrfs_set_path_blocking(path); + ret = btrfs_prev_leaf(root, path); + if (ret != 0) + return ret; + } else { + path->slots[0]--; + } + leaf = path->nodes[0]; + nritems = btrfs_header_nritems(leaf); + if (nritems == 0) + return 1; + if (path->slots[0] == nritems) + path->slots[0]--; + + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + if (found_key.objectid < min_objectid) + break; + if (found_key.type == BTRFS_EXTENT_ITEM_KEY || + found_key.type == BTRFS_METADATA_ITEM_KEY) + return 0; + if (found_key.objectid == min_objectid && + found_key.type < BTRFS_EXTENT_ITEM_KEY) + break; + } + return 1; +} diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index ca6bcc33d033..3708fd7ee83a 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3334,6 +3334,8 @@ int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); int btrfs_previous_item(struct btrfs_root *root, struct btrfs_path *path, u64 min_objectid, int type); +int btrfs_previous_extent_item(struct btrfs_root *root, + struct btrfs_path *path, u64 min_objectid); void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *new_key); struct extent_buffer *btrfs_root_node(struct btrfs_root *root); diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index e0677e42d66d..51c342b9f5ef 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -2385,8 +2385,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx, goto out; if (ret > 0) { - ret = btrfs_previous_item(root, path, 0, - BTRFS_EXTENT_ITEM_KEY); + ret = btrfs_previous_extent_item(root, path, 0); if (ret < 0) goto out; if (ret > 0) { |
