1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * dir.h
6 *
7 * Function prototypes
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 */
11
12 #ifndef OCFS2_DIR_H
13 #define OCFS2_DIR_H
14
15 struct ocfs2_dx_hinfo {
16 u32 major_hash;
17 u32 minor_hash;
18 };
19
20 struct ocfs2_dir_lookup_result {
21 struct buffer_head *dl_leaf_bh; /* Unindexed leaf
22 * block */
23 struct ocfs2_dir_entry *dl_entry; /* Target dirent in
24 * unindexed leaf */
25
26 struct buffer_head *dl_dx_root_bh; /* Root of indexed
27 * tree */
28
29 struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */
30 struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in
31 * indexed leaf */
32 struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */
33
34 struct buffer_head *dl_prev_leaf_bh;/* Previous entry in
35 * dir free space
36 * list. NULL if
37 * previous entry is
38 * dx root block. */
39 };
40
41 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
42
43 int ocfs2_find_entry(const char *name, int namelen,
44 struct inode *dir,
45 struct ocfs2_dir_lookup_result *lookup);
46 int ocfs2_delete_entry(handle_t *handle,
47 struct inode *dir,
48 struct ocfs2_dir_lookup_result *res);
49 int __ocfs2_add_entry(handle_t *handle,
50 struct inode *dir,
51 const char *name, int namelen,
52 struct inode *inode, u64 blkno,
53 struct buffer_head *parent_fe_bh,
54 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)55 static inline int ocfs2_add_entry(handle_t *handle,
56 struct dentry *dentry,
57 struct inode *inode, u64 blkno,
58 struct buffer_head *parent_fe_bh,
59 struct ocfs2_dir_lookup_result *lookup)
60 {
61 return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
62 dentry->d_name.name, dentry->d_name.len,
63 inode, blkno, parent_fe_bh, lookup);
64 }
65 int ocfs2_update_entry(struct inode *dir, handle_t *handle,
66 struct ocfs2_dir_lookup_result *res,
67 struct inode *new_entry_inode);
68
69 int ocfs2_check_dir_for_entry(struct inode *dir,
70 const char *name,
71 int namelen);
72 int ocfs2_empty_dir(struct inode *inode);
73
74 int ocfs2_find_files_on_disk(const char *name,
75 int namelen,
76 u64 *blkno,
77 struct inode *inode,
78 struct ocfs2_dir_lookup_result *res);
79 int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
80 int namelen, u64 *blkno);
81 int ocfs2_readdir(struct file *file, struct dir_context *ctx);
82 int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
83 int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
84 struct inode *dir,
85 struct buffer_head *parent_fe_bh,
86 const char *name,
87 int namelen,
88 struct ocfs2_dir_lookup_result *lookup);
89 struct ocfs2_alloc_context;
90 int ocfs2_fill_new_dir(struct ocfs2_super *osb,
91 handle_t *handle,
92 struct inode *parent,
93 struct inode *inode,
94 struct buffer_head *fe_bh,
95 struct ocfs2_alloc_context *data_ac,
96 struct ocfs2_alloc_context *meta_ac);
97
98 int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
99
100 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
101 void *data);
102 #endif /* OCFS2_DIR_H */
103