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/*
* Copyright (c) 2000-2001 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_BLOCK_H__
#define __XFS_DIR2_BLOCK_H__
/*
* xfs_dir2_block.h
* Directory version 2, single block format structures
*/
struct uio;
struct xfs_dabuf;
struct xfs_da_args;
struct xfs_dir2_data_hdr;
struct xfs_dir2_leaf_entry;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;
/*
* The single block format is as follows:
* xfs_dir2_data_hdr_t structure
* xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
* xfs_dir2_leaf_entry_t structures
* xfs_dir2_block_tail_t structure
*/
#define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
typedef struct xfs_dir2_block_tail {
__uint32_t count; /* count of leaf entries */
__uint32_t stale; /* count of stale lf entries */
} xfs_dir2_block_tail_t;
/*
* Generic single-block structure, for xfs_db.
*/
typedef struct xfs_dir2_block {
xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */
xfs_dir2_data_union_t u[1];
xfs_dir2_leaf_entry_t leaf[1];
xfs_dir2_block_tail_t tail;
} xfs_dir2_block_t;
/*
* Pointer to the leaf header embedded in a data block (1-block format)
*/
#define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block)
static inline xfs_dir2_block_tail_t *
xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block)
{
return (((xfs_dir2_block_tail_t *)
((char *)(block) + (mp)->m_dirblksize)) - 1);
}
/*
* Pointer to the leaf entries embedded in a data block (1-block format)
*/
#define XFS_DIR2_BLOCK_LEAF_P(btp) xfs_dir2_block_leaf_p(btp)
static inline struct xfs_dir2_leaf_entry *
xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp)
{
return (((struct xfs_dir2_leaf_entry *)
(btp)) - INT_GET((btp)->count, ARCH_CONVERT));
}
/*
* Function declarations.
*/
extern int xfs_dir2_block_addname(struct xfs_da_args *args);
extern int xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
struct uio *uio, int *eofp,
struct xfs_dirent *dbp, xfs_dir2_put_t put);
extern int xfs_dir2_block_lookup(struct xfs_da_args *args);
extern int xfs_dir2_block_removename(struct xfs_da_args *args);
extern int xfs_dir2_block_replace(struct xfs_da_args *args);
extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
struct xfs_dabuf *lbp, struct xfs_dabuf *dbp);
extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
#endif /* __XFS_DIR2_BLOCK_H__ */
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