xref: /openbmc/linux/fs/ocfs2/dir.h (revision fa60ce2c)
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