diff options
| -rw-r--r-- | fs/btrfs/disk-io.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 80ebcfdf6051..e1ac4b8de251 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -605,6 +605,27 @@ static int check_extent_data_item(struct btrfs_root *root, return 0; } +static int check_csum_item(struct btrfs_root *root, struct extent_buffer *leaf, + struct btrfs_key *key, int slot) +{ + u32 sectorsize = root->sectorsize; + u32 csumsize = btrfs_super_csum_size(root->fs_info->super_copy); + + if (key->objectid != BTRFS_EXTENT_CSUM_OBJECTID) { + CORRUPT("invalid objectid for csum item", leaf, root, slot); + return -EUCLEAN; + } + if (!IS_ALIGNED(key->offset, sectorsize)) { + CORRUPT("unaligned key offset for csum item", leaf, root, slot); + return -EUCLEAN; + } + if (!IS_ALIGNED(btrfs_item_size_nr(leaf, slot), csumsize)) { + CORRUPT("unaligned csum item size", leaf, root, slot); + return -EUCLEAN; + } + return 0; +} + /* * Common point to switch the item-specific validation. */ @@ -618,6 +639,9 @@ static int check_leaf_item(struct btrfs_root *root, case BTRFS_EXTENT_DATA_KEY: ret = check_extent_data_item(root, leaf, key, slot); break; + case BTRFS_EXTENT_CSUM_KEY: + ret = check_csum_item(root, leaf, key, slot); + break; } return ret; } |