/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#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;
/*
* Constants.
*/
/*
* 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 */
/*
* Structures.
*/
typedef struct xfs_dir2_free_hdr {
__uint32_t magic; /* XFS_DIR2_FREE_MAGIC */
__int32_t firstdb; /* db of first entry */
__int32_t nvalid; /* count of valid entries */
__int32_t nused; /* count of used entries */
} xfs_dir2_free_hdr_t;
typedef struct xfs_dir2_free {
xfs_dir2_free_hdr_t hdr; /* block header */
xfs_dir2_data_off_t 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))
/*
* Macros.
*/
/*
* Convert data space db to the corresponding free db.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_TO_FDB)
xfs_dir2_db_t
xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db);
#define XFS_DIR2_DB_TO_FDB(mp,db) xfs_dir2_db_to_fdb(mp, db)
#else
#define XFS_DIR2_DB_TO_FDB(mp,db) \
(XFS_DIR2_FREE_FIRSTDB(mp) + (db) / XFS_DIR2_MAX_FREE_BESTS(mp))
#endif
/*
* Convert data space db to the corresponding index in a free db.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_TO_FDINDEX)
int
xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db);
#define XFS_DIR2_DB_TO_FDINDEX(mp,db) xfs_dir2_db_to_fdindex(mp, db)
#else
#define XFS_DIR2_DB_TO_FDINDEX(mp,db) ((db) % XFS_DIR2_MAX_FREE_BESTS(mp))
#endif
/*
* Functions.
*/
extern void
xfs_dir2_free_log_bests(struct xfs_trans *tp, struct xfs_dabuf *bp,
int first, int last);
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__ */
