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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
3 | * |
4 | * dir.h |
5 | * |
6 | * Function prototypes |
7 | * |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
9 | * |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public |
12 | * License as published by the Free Software Foundation; either |
13 | * version 2 of the License, or (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public |
21 | * License along with this program; if not, write to the |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
23 | * Boston, MA 021110-1307, USA. |
24 | */ |
25 | |
26 | #ifndef OCFS2_DIR_H |
27 | #define OCFS2_DIR_H |
28 | |
29 | struct ocfs2_dx_hinfo { |
30 | u32 major_hash; |
31 | u32 minor_hash; |
32 | }; |
33 | |
34 | struct ocfs2_dir_lookup_result { |
35 | struct buffer_head *dl_leaf_bh; /* Unindexed leaf |
36 | * block */ |
37 | struct ocfs2_dir_entry *dl_entry; /* Target dirent in |
38 | * unindexed leaf */ |
39 | |
40 | struct buffer_head *dl_dx_root_bh; /* Root of indexed |
41 | * tree */ |
42 | |
43 | struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */ |
44 | struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in |
45 | * indexed leaf */ |
46 | struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */ |
47 | |
48 | struct buffer_head *dl_prev_leaf_bh;/* Previous entry in |
49 | * dir free space |
50 | * list. NULL if |
51 | * previous entry is |
52 | * dx root block. */ |
53 | }; |
54 | |
55 | void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res); |
56 | |
57 | int ocfs2_find_entry(const char *name, int namelen, |
58 | struct inode *dir, |
59 | struct ocfs2_dir_lookup_result *lookup); |
60 | int ocfs2_delete_entry(handle_t *handle, |
61 | struct inode *dir, |
62 | struct ocfs2_dir_lookup_result *res); |
63 | int __ocfs2_add_entry(handle_t *handle, |
64 | struct inode *dir, |
65 | const char *name, int namelen, |
66 | struct inode *inode, u64 blkno, |
67 | struct buffer_head *parent_fe_bh, |
68 | struct ocfs2_dir_lookup_result *lookup); |
69 | static inline int ocfs2_add_entry(handle_t *handle, |
70 | struct dentry *dentry, |
71 | struct inode *inode, u64 blkno, |
72 | struct buffer_head *parent_fe_bh, |
73 | struct ocfs2_dir_lookup_result *lookup) |
74 | { |
75 | return __ocfs2_add_entry(handle, dentry->d_parent->d_inode, |
76 | dentry->d_name.name, dentry->d_name.len, |
77 | inode, blkno, parent_fe_bh, lookup); |
78 | } |
79 | int ocfs2_update_entry(struct inode *dir, handle_t *handle, |
80 | struct ocfs2_dir_lookup_result *res, |
81 | struct inode *new_entry_inode); |
82 | |
83 | int ocfs2_check_dir_for_entry(struct inode *dir, |
84 | const char *name, |
85 | int namelen); |
86 | int ocfs2_empty_dir(struct inode *inode); |
87 | |
88 | int ocfs2_find_files_on_disk(const char *name, |
89 | int namelen, |
90 | u64 *blkno, |
91 | struct inode *inode, |
92 | struct ocfs2_dir_lookup_result *res); |
93 | int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name, |
94 | int namelen, u64 *blkno); |
95 | int ocfs2_readdir(struct file *filp, void *dirent, filldir_t filldir); |
96 | int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv, |
97 | filldir_t filldir); |
98 | int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, |
99 | struct inode *dir, |
100 | struct buffer_head *parent_fe_bh, |
101 | const char *name, |
102 | int namelen, |
103 | struct ocfs2_dir_lookup_result *lookup); |
104 | struct ocfs2_alloc_context; |
105 | int ocfs2_fill_new_dir(struct ocfs2_super *osb, |
106 | handle_t *handle, |
107 | struct inode *parent, |
108 | struct inode *inode, |
109 | struct buffer_head *fe_bh, |
110 | struct ocfs2_alloc_context *data_ac, |
111 | struct ocfs2_alloc_context *meta_ac); |
112 | |
113 | int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh); |
114 | |
115 | struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize, |
116 | void *data); |
117 | #endif /* OCFS2_DIR_H */ |
118 |
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