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Btrfs: Add back pointers from the inode to the directory that references it

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-12-12 14:38:19 -05:00
parent d8d5f3e16d
commit 3954401fa6
3 changed files with 272 additions and 143 deletions
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21
fs/btrfs/ctree.h
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@@ -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);