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1 | /* |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. |
4 | * |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as |
7 | * published by the Free Software Foundation. |
8 | * |
9 | * 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. |
13 | * |
14 | * 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 |
17 | */ |
18 | #ifndef __XFS_DIR2_H__ |
19 | #define __XFS_DIR2_H__ |
20 | |
21 | struct uio; |
22 | struct xfs_dabuf; |
23 | struct xfs_da_args; |
24 | struct xfs_dir2_put_args; |
25 | struct xfs_bmap_free; |
26 | struct xfs_inode; |
27 | struct xfs_mount; |
28 | struct xfs_trans; |
29 | |
30 | /* |
31 | * Directory version 2. |
32 | * There are 4 possible formats: |
33 | * shortform |
34 | * single block - data with embedded leaf at the end |
35 | * multiple data blocks, single leaf+freeindex block |
36 | * data blocks, node&leaf blocks (btree), freeindex blocks |
37 | * |
38 | * The shortform format is in xfs_dir2_sf.h. |
39 | * The single block format is in xfs_dir2_block.h. |
40 | * The data block format is in xfs_dir2_data.h. |
41 | * The leaf and freeindex block formats are in xfs_dir2_leaf.h. |
42 | * Node blocks are the same as the other version, in xfs_da_btree.h. |
43 | */ |
44 | |
45 | /* |
46 | * Byte offset in data block and shortform entry. |
47 | */ |
48 | typedef __uint16_t xfs_dir2_data_off_t; |
49 | #define NULLDATAOFF 0xffffU |
50 | typedef uint xfs_dir2_data_aoff_t; /* argument form */ |
51 | |
52 | /* |
53 | * Directory block number (logical dirblk in file) |
54 | */ |
55 | typedef __uint32_t xfs_dir2_db_t; |
56 | |
57 | /* |
58 | * Byte offset in a directory. |
59 | */ |
60 | typedef xfs_off_t xfs_dir2_off_t; |
61 | |
62 | extern struct xfs_name xfs_name_dotdot; |
63 | |
64 | /* |
65 | * Generic directory interface routines |
66 | */ |
67 | extern void xfs_dir_startup(void); |
68 | extern void xfs_dir_mount(struct xfs_mount *mp); |
69 | extern int xfs_dir_isempty(struct xfs_inode *dp); |
70 | extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp, |
71 | struct xfs_inode *pdp); |
72 | extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp, |
73 | struct xfs_name *name, xfs_ino_t inum, |
74 | xfs_fsblock_t *first, |
75 | struct xfs_bmap_free *flist, xfs_extlen_t tot); |
76 | extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp, |
77 | struct xfs_name *name, xfs_ino_t *inum, |
78 | struct xfs_name *ci_name); |
79 | extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp, |
80 | struct xfs_name *name, xfs_ino_t ino, |
81 | xfs_fsblock_t *first, |
82 | struct xfs_bmap_free *flist, xfs_extlen_t tot); |
83 | extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp, |
84 | struct xfs_name *name, xfs_ino_t inum, |
85 | xfs_fsblock_t *first, |
86 | struct xfs_bmap_free *flist, xfs_extlen_t tot); |
87 | extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp, |
88 | struct xfs_name *name, uint resblks); |
89 | extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino); |
90 | |
91 | /* |
92 | * Utility routines for v2 directories. |
93 | */ |
94 | extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space, |
95 | xfs_dir2_db_t *dbp); |
96 | extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, |
97 | int *vp); |
98 | extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, |
99 | int *vp); |
100 | extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, |
101 | struct xfs_dabuf *bp); |
102 | |
103 | extern int xfs_dir_cilookup_result(struct xfs_da_args *args, |
104 | const unsigned char *name, int len); |
105 | |
106 | #endif /* __XFS_DIR2_H__ */ |
107 |
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