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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | #ifndef __XFS_DIR2_H__ | |
33 | #define __XFS_DIR2_H__ | |
34 | ||
35 | struct uio; | |
36 | struct xfs_dabuf; | |
37 | struct xfs_da_args; | |
38 | struct xfs_dir2_put_args; | |
39 | struct xfs_inode; | |
40 | struct xfs_trans; | |
41 | ||
42 | /* | |
43 | * Directory version 2. | |
44 | * There are 4 possible formats: | |
45 | * shortform | |
46 | * single block - data with embedded leaf at the end | |
47 | * multiple data blocks, single leaf+freeindex block | |
48 | * data blocks, node&leaf blocks (btree), freeindex blocks | |
49 | * | |
50 | * The shortform format is in xfs_dir2_sf.h. | |
51 | * The single block format is in xfs_dir2_block.h. | |
52 | * The data block format is in xfs_dir2_data.h. | |
53 | * The leaf and freeindex block formats are in xfs_dir2_leaf.h. | |
54 | * Node blocks are the same as the other version, in xfs_da_btree.h. | |
55 | */ | |
56 | ||
57 | /* | |
58 | * Byte offset in data block and shortform entry. | |
59 | */ | |
60 | typedef __uint16_t xfs_dir2_data_off_t; | |
61 | #define NULLDATAOFF 0xffffU | |
62 | typedef uint xfs_dir2_data_aoff_t; /* argument form */ | |
63 | ||
64 | /* | |
65 | * Directory block number (logical dirblk in file) | |
66 | */ | |
67 | typedef __uint32_t xfs_dir2_db_t; | |
68 | ||
69 | /* | |
70 | * Byte offset in a directory. | |
71 | */ | |
72 | typedef xfs_off_t xfs_dir2_off_t; | |
73 | ||
74 | /* | |
75 | * For getdents, argument struct for put routines. | |
76 | */ | |
77 | typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa); | |
78 | typedef struct xfs_dir2_put_args { | |
79 | xfs_off_t cook; /* cookie of (next) entry */ | |
80 | xfs_intino_t ino; /* inode number */ | |
81 | struct xfs_dirent *dbp; /* buffer pointer */ | |
82 | char *name; /* directory entry name */ | |
83 | int namelen; /* length of name */ | |
84 | int done; /* output: set if value was stored */ | |
85 | xfs_dir2_put_t put; /* put function ptr (i/o) */ | |
86 | struct uio *uio; /* uio control structure */ | |
87 | } xfs_dir2_put_args_t; | |
88 | ||
89 | #define XFS_DIR_IS_V2(mp) ((mp)->m_dirversion == 2) | |
90 | extern xfs_dirops_t xfsv2_dirops; | |
91 | ||
92 | /* | |
93 | * Other interfaces used by the rest of the dir v2 code. | |
94 | */ | |
95 | extern int | |
96 | xfs_dir2_grow_inode(struct xfs_da_args *args, int space, | |
97 | xfs_dir2_db_t *dbp); | |
98 | ||
99 | extern int | |
100 | xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *vp); | |
101 | ||
102 | extern int | |
103 | xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *vp); | |
104 | ||
105 | extern int | |
106 | xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, | |
107 | struct xfs_dabuf *bp); | |
108 | ||
109 | #endif /* __XFS_DIR2_H__ */ |