btrfs: introduce BTRFS_MAX_ITEM_SIZE

[cascardo/linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 950e4ee..1d46cee 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -150,13 +150,13 @@ struct btrfs_header {
                                     sizeof(struct btrfs_key_ptr))
 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
+#define BTRFS_MAX_ITEM_SIZE(r) \
+       (BTRFS_LEAF_DATA_SIZE(r) - sizeof(struct btrfs_item))
 #define BTRFS_FILE_EXTENT_INLINE_DATA_START            \
                (offsetof(struct btrfs_file_extent_item, disk_bytenr))
-#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
-                                       sizeof(struct btrfs_item) - \
+#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_MAX_ITEM_SIZE(r) - \
                                        BTRFS_FILE_EXTENT_INLINE_DATA_START)
-#define BTRFS_MAX_XATTR_SIZE(r)        (BTRFS_LEAF_DATA_SIZE(r) - \
-                                sizeof(struct btrfs_item) -\
+#define BTRFS_MAX_XATTR_SIZE(r)        (BTRFS_MAX_ITEM_SIZE(r) - \
                                 sizeof(struct btrfs_dir_item))