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
29struct ocfs2_dx_hinfo {
30	u32	major_hash;
31	u32	minor_hash;
32};
33
34struct 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
55void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
56
57int ocfs2_find_entry(const char *name, int namelen,
58		     struct inode *dir,
59		     struct ocfs2_dir_lookup_result *lookup);
60int ocfs2_delete_entry(handle_t *handle,
61		       struct inode *dir,
62		       struct ocfs2_dir_lookup_result *res);
63int __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);
69static 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}
79int ocfs2_update_entry(struct inode *dir, handle_t *handle,
80		       struct ocfs2_dir_lookup_result *res,
81		       struct inode *new_entry_inode);
82
83int ocfs2_check_dir_for_entry(struct inode *dir,
84			      const char *name,
85			      int namelen);
86int ocfs2_empty_dir(struct inode *inode);
87
88int 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);
93int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
94			       int namelen, u64 *blkno);
95int ocfs2_readdir(struct file *filp, void *dirent, filldir_t filldir);
96int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv,
97		      filldir_t filldir);
98int 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);
104struct ocfs2_alloc_context;
105int 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
113int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
114
115struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
116							    void *data);
117#endif /* OCFS2_DIR_H */
118