mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
5d77c0dc0c
Just minor housekeeping, a lot more functions can be trivially made static; others could if we reordered things a bit... Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Alex Elder <aelder@sgi.com>
101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_DIR2_NODE_H__
|
|
#define __XFS_DIR2_NODE_H__
|
|
|
|
/*
|
|
* Directory version 2, btree node format structures
|
|
*/
|
|
|
|
struct uio;
|
|
struct xfs_dabuf;
|
|
struct xfs_da_args;
|
|
struct xfs_da_state;
|
|
struct xfs_da_state_blk;
|
|
struct xfs_inode;
|
|
struct xfs_trans;
|
|
|
|
/*
|
|
* Offset of the freespace index.
|
|
*/
|
|
#define XFS_DIR2_FREE_SPACE 2
|
|
#define XFS_DIR2_FREE_OFFSET (XFS_DIR2_FREE_SPACE * XFS_DIR2_SPACE_SIZE)
|
|
#define XFS_DIR2_FREE_FIRSTDB(mp) \
|
|
xfs_dir2_byte_to_db(mp, XFS_DIR2_FREE_OFFSET)
|
|
|
|
#define XFS_DIR2_FREE_MAGIC 0x58443246 /* XD2F */
|
|
|
|
typedef struct xfs_dir2_free_hdr {
|
|
__be32 magic; /* XFS_DIR2_FREE_MAGIC */
|
|
__be32 firstdb; /* db of first entry */
|
|
__be32 nvalid; /* count of valid entries */
|
|
__be32 nused; /* count of used entries */
|
|
} xfs_dir2_free_hdr_t;
|
|
|
|
typedef struct xfs_dir2_free {
|
|
xfs_dir2_free_hdr_t hdr; /* block header */
|
|
__be16 bests[1]; /* best free counts */
|
|
/* unused entries are -1 */
|
|
} xfs_dir2_free_t;
|
|
|
|
#define XFS_DIR2_MAX_FREE_BESTS(mp) \
|
|
(((mp)->m_dirblksize - (uint)sizeof(xfs_dir2_free_hdr_t)) / \
|
|
(uint)sizeof(xfs_dir2_data_off_t))
|
|
|
|
/*
|
|
* Convert data space db to the corresponding free db.
|
|
*/
|
|
static inline xfs_dir2_db_t
|
|
xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db)
|
|
{
|
|
return (XFS_DIR2_FREE_FIRSTDB(mp) + (db) / XFS_DIR2_MAX_FREE_BESTS(mp));
|
|
}
|
|
|
|
/*
|
|
* Convert data space db to the corresponding index in a free db.
|
|
*/
|
|
static inline int
|
|
xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db)
|
|
{
|
|
return ((db) % XFS_DIR2_MAX_FREE_BESTS(mp));
|
|
}
|
|
|
|
extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args,
|
|
struct xfs_dabuf *lbp);
|
|
extern xfs_dahash_t xfs_dir2_leafn_lasthash(struct xfs_dabuf *bp, int *count);
|
|
extern int xfs_dir2_leafn_lookup_int(struct xfs_dabuf *bp,
|
|
struct xfs_da_args *args, int *indexp,
|
|
struct xfs_da_state *state);
|
|
extern int xfs_dir2_leafn_order(struct xfs_dabuf *leaf1_bp,
|
|
struct xfs_dabuf *leaf2_bp);
|
|
extern int xfs_dir2_leafn_split(struct xfs_da_state *state,
|
|
struct xfs_da_state_blk *oldblk,
|
|
struct xfs_da_state_blk *newblk);
|
|
extern int xfs_dir2_leafn_toosmall(struct xfs_da_state *state, int *action);
|
|
extern void xfs_dir2_leafn_unbalance(struct xfs_da_state *state,
|
|
struct xfs_da_state_blk *drop_blk,
|
|
struct xfs_da_state_blk *save_blk);
|
|
extern int xfs_dir2_node_addname(struct xfs_da_args *args);
|
|
extern int xfs_dir2_node_lookup(struct xfs_da_args *args);
|
|
extern int xfs_dir2_node_removename(struct xfs_da_args *args);
|
|
extern int xfs_dir2_node_replace(struct xfs_da_args *args);
|
|
extern int xfs_dir2_node_trim_free(struct xfs_da_args *args, xfs_fileoff_t fo,
|
|
int *rvalp);
|
|
|
|
#endif /* __XFS_DIR2_NODE_H__ */
|