1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * dir.h
4 *
5 * Function prototypes
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 */
9
10 #ifndef OCFS2_DIR_H
11 #define OCFS2_DIR_H
12
13 struct ocfs2_dx_hinfo {
14 u32 major_hash;
15 u32 minor_hash;
16 };
17
18 struct ocfs2_dir_lookup_result {
19 struct buffer_head *dl_leaf_bh; /* Unindexed leaf
20 * block */
21 struct ocfs2_dir_entry *dl_entry; /* Target dirent in
22 * unindexed leaf */
23
24 struct buffer_head *dl_dx_root_bh; /* Root of indexed
25 * tree */
26
27 struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */
28 struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in
29 * indexed leaf */
30 struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */
31
32 struct buffer_head *dl_prev_leaf_bh;/* Previous entry in
33 * dir free space
34 * list. NULL if
35 * previous entry is
36 * dx root block. */
37 };
38
39 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
40
41 int ocfs2_find_entry(const char *name, int namelen,
42 struct inode *dir,
43 struct ocfs2_dir_lookup_result *lookup);
44 int ocfs2_delete_entry(handle_t *handle,
45 struct inode *dir,
46 struct ocfs2_dir_lookup_result *res);
47 int __ocfs2_add_entry(handle_t *handle,
48 struct inode *dir,
49 const char *name, int namelen,
50 struct inode *inode, u64 blkno,
51 struct buffer_head *parent_fe_bh,
52 struct ocfs2_dir_lookup_result *lookup);
ocfs2_add_entry(handle_t * handle,struct dentry * dentry,struct inode * inode,u64 blkno,struct buffer_head * parent_fe_bh,struct ocfs2_dir_lookup_result * lookup)53 static inline int ocfs2_add_entry(handle_t *handle,
54 struct dentry *dentry,
55 struct inode *inode, u64 blkno,
56 struct buffer_head *parent_fe_bh,
57 struct ocfs2_dir_lookup_result *lookup)
58 {
59 return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
60 dentry->d_name.name, dentry->d_name.len,
61 inode, blkno, parent_fe_bh, lookup);
62 }
63 int ocfs2_update_entry(struct inode *dir, handle_t *handle,
64 struct ocfs2_dir_lookup_result *res,
65 struct inode *new_entry_inode);
66
67 int ocfs2_check_dir_for_entry(struct inode *dir,
68 const char *name,
69 int namelen);
70 int ocfs2_empty_dir(struct inode *inode);
71
72 int ocfs2_find_files_on_disk(const char *name,
73 int namelen,
74 u64 *blkno,
75 struct inode *inode,
76 struct ocfs2_dir_lookup_result *res);
77 int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
78 int namelen, u64 *blkno);
79 int ocfs2_readdir(struct file *file, struct dir_context *ctx);
80 int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
81 int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
82 struct inode *dir,
83 struct buffer_head *parent_fe_bh,
84 const char *name,
85 int namelen,
86 struct ocfs2_dir_lookup_result *lookup);
87 struct ocfs2_alloc_context;
88 int ocfs2_fill_new_dir(struct ocfs2_super *osb,
89 handle_t *handle,
90 struct inode *parent,
91 struct inode *inode,
92 struct buffer_head *fe_bh,
93 struct ocfs2_alloc_context *data_ac,
94 struct ocfs2_alloc_context *meta_ac);
95
96 int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
97
98 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
99 void *data);
100 #endif /* OCFS2_DIR_H */
101