1 /*
2 * ext2fsP.h --- private header file for ext2 library
3 *
4 * Copyright (C) 1997 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
9 * %End-Header%
10 */
11
12 #if HAVE_SYS_STAT_H
13 #include <sys/stat.h>
14 #endif
15
16 #include "ext2fs.h"
17
18 #define EXT2FS_MAX_NESTED_LINKS 8
19
ext2fsP_is_disk_device(mode_t mode)20 static inline int ext2fsP_is_disk_device(mode_t mode)
21 {
22 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
23 return S_ISBLK(mode) || S_ISCHR(mode);
24 #else
25 return S_ISBLK(mode);
26 #endif
27 }
28
29 /*
30 * Badblocks list
31 */
32 struct ext2_struct_u32_list {
33 int magic;
34 int num;
35 int size;
36 __u32 *list;
37 int badblocks_flags;
38 };
39
40 struct ext2_struct_u32_iterate {
41 int magic;
42 ext2_u32_list bb;
43 int ptr;
44 };
45
46
47 /*
48 * Directory block iterator definition
49 */
50 struct ext2_struct_dblist {
51 int magic;
52 ext2_filsys fs;
53 unsigned long long size;
54 unsigned long long count;
55 int sorted;
56 struct ext2_db_entry2 * list;
57 };
58
59 /*
60 * For directory iterators
61 */
62 struct dir_context {
63 ext2_ino_t dir;
64 int flags;
65 char *buf;
66 unsigned int buflen;
67 int (*func)(ext2_ino_t dir,
68 int entry,
69 struct ext2_dir_entry *dirent,
70 int offset,
71 int blocksize,
72 char *buf,
73 void *priv_data);
74 void *priv_data;
75 errcode_t errcode;
76 };
77
78 /*
79 * Inode cache structure
80 */
81 struct ext2_inode_cache {
82 void * buffer;
83 blk64_t buffer_blk;
84 int cache_last;
85 unsigned int cache_size;
86 int refcount;
87 struct ext2_inode_cache_ent *cache;
88 };
89
90 struct ext2_inode_cache_ent {
91 ext2_ino_t ino;
92 struct ext2_inode *inode;
93 };
94
95 /*
96 * NLS defintions
97 */
98 struct ext2fs_nls_table {
99 int version;
100 const struct ext2fs_nls_ops *ops;
101 };
102
103 struct ext2fs_nls_ops {
104 int (*casefold)(const struct ext2fs_nls_table *charset,
105 const unsigned char *str, size_t len,
106 unsigned char *dest, size_t dlen);
107 };
108
109 /* Function prototypes */
110
111 extern int ext2fs_process_dir_block(ext2_filsys fs,
112 blk64_t *blocknr,
113 e2_blkcnt_t blockcnt,
114 blk64_t ref_block,
115 int ref_offset,
116 void *priv_data);
117
118 extern errcode_t ext2fs_inline_data_ea_remove(ext2_filsys fs, ext2_ino_t ino);
119 extern errcode_t ext2fs_inline_data_expand(ext2_filsys fs, ext2_ino_t ino);
120 extern int ext2fs_inline_data_dir_iterate(ext2_filsys fs,
121 ext2_ino_t ino,
122 void *priv_data);
123
124 /* Generic numeric progress meter */
125
126 struct ext2fs_numeric_progress_struct {
127 __u64 max;
128 int log_max;
129 int skip_progress;
130 };
131
132 /*
133 * progress callback functions
134 */
135 struct ext2fs_progress_ops {
136 void (*init)(ext2_filsys fs,
137 struct ext2fs_numeric_progress_struct * progress,
138 const char *label, __u64 max);
139 void (*update)(ext2_filsys fs,
140 struct ext2fs_numeric_progress_struct * progress,
141 __u64 val);
142 void (*close)(ext2_filsys fs,
143 struct ext2fs_numeric_progress_struct * progress,
144 const char *message);
145 };
146
147 extern struct ext2fs_progress_ops ext2fs_numeric_progress_ops;
148
149 extern void ext2fs_numeric_progress_init(ext2_filsys fs,
150 struct ext2fs_numeric_progress_struct * progress,
151 const char *label, __u64 max);
152 extern void ext2fs_numeric_progress_update(ext2_filsys fs,
153 struct ext2fs_numeric_progress_struct * progress,
154 __u64 val);
155 extern void ext2fs_numeric_progress_close(ext2_filsys fs,
156 struct ext2fs_numeric_progress_struct * progress,
157 const char *message);
158
159 /*
160 * 64-bit bitmap support
161 */
162
163 extern errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
164 int type, __u64 start, __u64 end,
165 __u64 real_end,
166 const char * description,
167 ext2fs_generic_bitmap *bmap);
168
169 extern void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
170
171 extern errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
172 ext2fs_generic_bitmap *dest);
173
174 extern errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
175 __u64 new_end,
176 __u64 new_real_end);
177 extern errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
178 errcode_t neq,
179 __u64 end, __u64 *oend);
180 extern int ext2fs_mark_generic_bmap(ext2fs_generic_bitmap bitmap,
181 __u64 arg);
182 extern int ext2fs_unmark_generic_bmap(ext2fs_generic_bitmap bitmap,
183 __u64 arg);
184 extern int ext2fs_test_generic_bmap(ext2fs_generic_bitmap bitmap,
185 __u64 arg);
186 extern errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bitmap,
187 __u64 start, unsigned int num,
188 void *in);
189 extern errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bitmap,
190 __u64 start, unsigned int num,
191 void *out);
192 extern void ext2fs_warn_bitmap32(ext2fs_generic_bitmap bitmap,const char *func);
193
194 extern int ext2fs_mem_is_zero(const char *mem, size_t len);
195
196 extern int ext2fs_file_block_offset_too_big(ext2_filsys fs,
197 struct ext2_inode *inode,
198 blk64_t offset);
199
200 /* atexit support */
201 typedef void (*ext2_exit_fn)(void *);
202 errcode_t ext2fs_add_exit_fn(ext2_exit_fn fn, void *data);
203 errcode_t ext2fs_remove_exit_fn(ext2_exit_fn fn, void *data);
204
205 #define EXT2FS_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2*!!(cond)]))
206