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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>
This commit is contained in:
Jeff Mahoney 2016-06-15 10:33:06 -04:00 committed by David Sterba
parent 14a1e067b4
commit 1db1ff92b6
1 changed files with 33 additions and 15 deletions
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48
fs/btrfs/ctree.h
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@ -145,21 +145,6 @@ struct btrfs_header {
u8 level; u8 level;
} __attribute__ ((__packed__)); } __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 * this is a very generous portion of the super block, giving us
* room to translate 14 chunks with 3 stripes each. * room to translate 14 chunks with 3 stripes each.
@ -1261,6 +1246,39 @@ struct btrfs_root {
atomic_t qgroup_meta_rsv; 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. * Flags for mount options.
* *