btrfs: Add checker for EXTENT_CSUM (4b865cab) · Commits · 戴 / test

fs/btrfs/disk-io.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -626,6 +626,27 @@ 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->fs_info->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.
		*/
		@@ -639,6 +660,9 @@ 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;
		}