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| author | Chris Mason <chris.mason@oracle.com> | 2007-03-14 10:31:29 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-03-14 10:31:29 -0400 |
| commit | 4beb1b8b75a86373f6020103ab840448d14c8880 (patch) | |
| tree | 944e80ccd6764afd16b4e31d5595d2decf36dabc /fs/btrfs/ctree.h | |
| parent | 710874947aa0f81c3b348b052e81cb9075113c49 (diff) | |
| download | lwn-4beb1b8b75a86373f6020103ab840448d14c8880.tar.gz lwn-4beb1b8b75a86373f6020103ab840448d14c8880.zip | |
Btrfs: add leaf data casting helper
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0968899fb7f9..05c7707263f5 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -401,6 +401,10 @@ static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, s->blocksize = cpu_to_le16(val); } +/* helper function to cast into the data area of the leaf. */ +#define btrfs_item_ptr(leaf, slot, type) \ + ((type *)((leaf)->data + btrfs_item_offset((leaf)->items + (slot)))) + struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_root *root); int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf); int btrfs_free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks); |