btrfs: convert nodesize macros to static inlines

This patch converts the macros used to calculate various node
size limits to static inlines.  That way we get type checking for free.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 1d46cee..85e0b60 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -145,21 +145,6 @@ struct btrfs_header {
        u8 level;
 } __attribute__ ((__packed__));
 
-#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
-                                     sizeof(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_MAX_ITEM_SIZE(r) - \
-                                       BTRFS_FILE_EXTENT_INLINE_DATA_START)
-#define BTRFS_MAX_XATTR_SIZE(r)        (BTRFS_MAX_ITEM_SIZE(r) - \
-                                sizeof(struct btrfs_dir_item))
-
-
 /*
  * this is a very generous portion of the super block, giving us
  * room to translate 14 chunks with 3 stripes each.
@@ -1261,6 +1246,39 @@ struct btrfs_root {
        atomic_t qgroup_meta_rsv;
 };
 
+static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
+{
+       return blocksize - sizeof(struct btrfs_header);
+}
+
+static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root)
+{
+       return __BTRFS_LEAF_DATA_SIZE(root->nodesize);
+}
+
+static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root)
+{
+       return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
+}
+
+static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root)
+{
+       return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr);
+}
+
+#define BTRFS_FILE_EXTENT_INLINE_DATA_START            \
+               (offsetof(struct btrfs_file_extent_item, disk_bytenr))
+static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root)
+{
+       return BTRFS_MAX_ITEM_SIZE(root) -
+              BTRFS_FILE_EXTENT_INLINE_DATA_START;
+}
+
+static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root)
+{
+       return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item);
+}
+
 /*
  * Flags for mount options.
  *