xfs_dir2_block.h 3.84 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13
/*
 * 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
Russell Cattelan's avatar
Russell Cattelan committed
14
 * or the like.  Any license provided herein, whether implied or
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
 * 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__
Russell Cattelan's avatar
Russell Cattelan committed
33
#define	__XFS_DIR2_BLOCK_H__
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

/*
 * 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
 */

Russell Cattelan's avatar
Russell Cattelan committed
57
#define	XFS_DIR2_BLOCK_MAGIC	0x58443242	/* XD2B: for one block dirs */
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

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)
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P)
xfs_dir2_block_tail_t *
xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block);
Russell Cattelan's avatar
Russell Cattelan committed
80
#define	XFS_DIR2_BLOCK_TAIL_P(mp,block)	xfs_dir2_block_tail_p(mp,block)
81
#else
Russell Cattelan's avatar
Russell Cattelan committed
82
#define	XFS_DIR2_BLOCK_TAIL_P(mp,block)	\
83 84 85 86 87 88 89 90 91
	(((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1)
#endif

/*
 * Pointer to the leaf entries embedded in a data block (1-block format)
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P)
struct xfs_dir2_leaf_entry *xfs_dir2_block_leaf_p_arch(
	xfs_dir2_block_tail_t *btp, xfs_arch_t arch);
Russell Cattelan's avatar
Russell Cattelan committed
92
#define	XFS_DIR2_BLOCK_LEAF_P_ARCH(btp,arch) \
93 94
	xfs_dir2_block_leaf_p_arch(btp,arch)
#else
Russell Cattelan's avatar
Russell Cattelan committed
95
#define	XFS_DIR2_BLOCK_LEAF_P_ARCH(btp,arch)	\
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
	(((struct xfs_dir2_leaf_entry *)(btp)) - INT_GET((btp)->count, arch))
#endif

/*
 * 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__ */