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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_DIR2_H__
19#define __XFS_DIR2_H__
20
21struct uio;
22struct xfs_dabuf;
23struct xfs_da_args;
24struct xfs_dir2_put_args;
25struct xfs_inode;
26struct xfs_trans;
27
28/*
29 * Directory version 2.
30 * There are 4 possible formats:
31 * shortform
32 * single block - data with embedded leaf at the end
33 * multiple data blocks, single leaf+freeindex block
34 * data blocks, node&leaf blocks (btree), freeindex blocks
35 *
36 * The shortform format is in xfs_dir2_sf.h.
37 * The single block format is in xfs_dir2_block.h.
38 * The data block format is in xfs_dir2_data.h.
39 * The leaf and freeindex block formats are in xfs_dir2_leaf.h.
40 * Node blocks are the same as the other version, in xfs_da_btree.h.
41 */
42
43/*
44 * Byte offset in data block and shortform entry.
45 */
46typedef __uint16_t xfs_dir2_data_off_t;
47#define NULLDATAOFF 0xffffU
48typedef uint xfs_dir2_data_aoff_t; /* argument form */
49
50/*
51 * Directory block number (logical dirblk in file)
52 */
53typedef __uint32_t xfs_dir2_db_t;
54
55/*
56 * Byte offset in a directory.
57 */
58typedef xfs_off_t xfs_dir2_off_t;
59
60/*
61 * For getdents, argument struct for put routines.
62 */
63typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa);
64typedef struct xfs_dir2_put_args {
65 xfs_off_t cook; /* cookie of (next) entry */
66 xfs_intino_t ino; /* inode number */
67 struct xfs_dirent *dbp; /* buffer pointer */
68 char *name; /* directory entry name */
69 int namelen; /* length of name */
70 int done; /* output: set if value was stored */
71 xfs_dir2_put_t put; /* put function ptr (i/o) */
72 struct uio *uio; /* uio control structure */
73} xfs_dir2_put_args_t;
74
75#define XFS_DIR_IS_V2(mp) ((mp)->m_dirversion == 2)
76extern xfs_dirops_t xfsv2_dirops;
77
78/*
79 * Other interfaces used by the rest of the dir v2 code.
80 */
81extern int
82 xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
83 xfs_dir2_db_t *dbp);
84
85extern int
86 xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *vp);
87
88extern int
89 xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *vp);
90
91extern int
92 xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
93 struct xfs_dabuf *bp);
94
95#endif /* __XFS_DIR2_H__ */