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| author | Chris Mason <chris.mason@oracle.com> | 2007-12-12 14:38:19 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:58 -0400 |
| commit | 3954401fa6013bb2f2c8758b903e9bffcf25b64b (patch) | |
| tree | cc9e732db0466d35c7b7b42caef6e6bc994f940c /fs/btrfs/ctree.h | |
| parent | d8d5f3e16d1ae4fe9b93312e083f2c04a95520f0 (diff) | |
| download | lwn-3954401fa6013bb2f2c8758b903e9bffcf25b64b.tar.gz lwn-3954401fa6013bb2f2c8758b903e9bffcf25b64b.zip | |
Btrfs: Add back pointers from the inode to the directory that references it
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index cb1b156d954e..035fa1550343 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -53,7 +53,7 @@ extern struct kmem_cache *btrfs_path_cachep; #define BTRFS_CSUM_SIZE 32 /* four bytes for CRC32 */ #define BTRFS_CRC32_SIZE 4 -#define BTRFS_EMPTY_DIR_SIZE 6 +#define BTRFS_EMPTY_DIR_SIZE 0 #define BTRFS_FT_UNKNOWN 0 #define BTRFS_FT_REG_FILE 1 @@ -206,6 +206,11 @@ struct btrfs_extent_ref { __le64 offset; } __attribute__ ((__packed__)); +struct btrfs_inode_ref { + __le16 name_len; + /* name goes here */ +} __attribute__ ((__packed__)); + struct btrfs_inode_timespec { __le64 sec; __le32 nsec; @@ -379,7 +384,8 @@ struct btrfs_root { * the FS */ #define BTRFS_INODE_ITEM_KEY 1 -#define BTRFS_XATTR_ITEM_KEY 2 +#define BTRFS_INODE_REF_KEY 2 +#define BTRFS_XATTR_ITEM_KEY 8 /* reserve 2-15 close to the inode for later flexibility */ /* @@ -486,6 +492,9 @@ BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, used, 64); +/* struct btrfs_inode_ref */ +BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); + /* struct btrfs_inode_item */ BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); @@ -1043,6 +1052,14 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); /* inode-item.c */ +int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid); +int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid); int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid); |