1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* blkidP.h - Internal interfaces for libblkid
*
* Copyright (C) 2001 Andreas Dilger
* Copyright (C) 2003 Theodore Ts'o
*
* %Begin-Header%
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
* %End-Header%
*/
#ifndef _BLKID_BLKIDP_H
#define _BLKID_BLKIDP_H
#include <sys/types.h>
#include <stdio.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <blkid/blkid.h>
#include <blkid/list.h>
#ifdef __GNUC__
#define __BLKID_ATTR(x) __attribute__(x)
#else
#define __BLKID_ATTR(x)
#endif
/*
* This describes the attributes of a specific device.
* We can traverse all of the tags by bid_tags (linking to the tag bit_names).
* The bid_label and bid_uuid fields are shortcuts to the LABEL and UUID tag
* values, if they exist.
*/
struct blkid_struct_dev
{
struct list_head bid_devs; /* All devices in the cache */
struct list_head bid_tags; /* All tags for this device */
blkid_cache bid_cache; /* Dev belongs to this cache */
char *bid_name; /* Device inode pathname */
char *bid_type; /* Preferred device TYPE */
int bid_pri; /* Device priority */
dev_t bid_devno; /* Device major/minor number */
time_t bid_time; /* Last update time of device */
unsigned int bid_flags; /* Device status bitflags */
char *bid_label; /* Shortcut to device LABEL */
char *bid_uuid; /* Shortcut to binary UUID */
};
#define BLKID_BID_FL_VERIFIED 0x0001 /* Device data validated from disk */
#define BLKID_BID_FL_INVALID 0x0004 /* Device is invalid */
/*
* Each tag defines a NAME=value pair for a particular device. The tags
* are linked via bit_names for a single device, so that traversing the
* names list will get you a list of all tags associated with a device.
* They are also linked via bit_values for all devices, so one can easily
* search all tags with a given NAME for a specific value.
*/
struct blkid_struct_tag
{
struct list_head bit_tags; /* All tags for this device */
struct list_head bit_names; /* All tags with given NAME */
char *bit_name; /* NAME of tag (shared) */
char *bit_val; /* value of tag */
blkid_dev bit_dev; /* pointer to device */
};
typedef struct blkid_struct_tag *blkid_tag;
/*
* Minimum number of seconds between device probes, even when reading
* from the cache. This is to avoid re-probing all devices which were
* just probed by another program that does not share the cache.
*/
#define BLKID_PROBE_MIN 2
/*
* Time in seconds an entry remains verified in the in-memory cache
* before being reverified (in case of long-running processes that
* keep a cache in memory and continue to use it for a long time).
*/
#define BLKID_PROBE_INTERVAL 200
/* This describes an entire blkid cache file and probed devices.
* We can traverse all of the found devices via bic_list.
* We can traverse all of the tag types by bic_tags, which hold empty tags
* for each tag type. Those tags can be used as list_heads for iterating
* through all devices with a specific tag type (e.g. LABEL).
*/
struct blkid_struct_cache
{
struct list_head bic_devs; /* List head of all devices */
struct list_head bic_tags; /* List head of all tag types */
time_t bic_time; /* Last probe time */
time_t bic_ftime; /* Mod time of the cachefile */
unsigned int bic_flags; /* Status flags of the cache */
char *bic_filename; /* filename of cache */
};
#define BLKID_BIC_FL_PROBED 0x0002 /* We probed /proc/partition devices */
#define BLKID_BIC_FL_CHANGED 0x0004 /* Cache has changed from disk */
extern char *blkid_strdup(const char *s);
extern char *blkid_strndup(const char *s, const int length);
#define BLKID_CACHE_FILE "/etc/blkid.tab"
#define BLKID_ERR_IO 5
#define BLKID_ERR_PROC 9
#define BLKID_ERR_MEM 12
#define BLKID_ERR_CACHE 14
#define BLKID_ERR_DEV 19
#define BLKID_ERR_PARAM 22
#define BLKID_ERR_BIG 27
/*
* Priority settings for different types of devices
*/
#define BLKID_PRI_DM 40
#define BLKID_PRI_EVMS 30
#define BLKID_PRI_LVM 20
#define BLKID_PRI_MD 10
#if defined(TEST_PROGRAM) && !defined(CONFIG_BLKID_DEBUG)
#define CONFIG_BLKID_DEBUG
#endif
#define DEBUG_CACHE 0x0001
#define DEBUG_DUMP 0x0002
#define DEBUG_DEV 0x0004
#define DEBUG_DEVNAME 0x0008
#define DEBUG_DEVNO 0x0010
#define DEBUG_PROBE 0x0020
#define DEBUG_READ 0x0040
#define DEBUG_RESOLVE 0x0080
#define DEBUG_SAVE 0x0100
#define DEBUG_TAG 0x0200
#define DEBUG_INIT 0x8000
#define DEBUG_ALL 0xFFFF
#ifdef CONFIG_BLKID_DEBUG
#include <stdio.h>
extern int blkid_debug_mask;
#define DBG(m,x) if ((m) & blkid_debug_mask) x;
#else
#define DBG(m,x)
#endif
#ifdef CONFIG_BLKID_DEBUG
extern void blkid_debug_dump_dev(blkid_dev dev);
extern void blkid_debug_dump_tag(blkid_tag tag);
#endif
static inline int blkidP_is_disk_device(mode_t mode)
{
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
return S_ISBLK(mode) || S_ISCHR(mode);
#else
return S_ISBLK(mode);
#endif
}
/* devno.c */
struct dir_list {
char *name;
struct dir_list *next;
};
extern void blkid__scan_dir(const char *, dev_t, struct dir_list **, char **);
/* lseek.c */
extern blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int whence);
/* read.c */
extern void blkid_read_cache(blkid_cache cache);
/* save.c */
extern int blkid_flush_cache(blkid_cache cache);
/*
* Functions to create and find a specific tag type: tag.c
*/
extern void blkid_free_tag(blkid_tag tag);
extern blkid_tag blkid_find_tag_dev(blkid_dev dev, const char *type);
extern int blkid_set_tag(blkid_dev dev, const char *name,
const char *value, const int vlength);
/*
* Functions to create and find a specific tag type: dev.c
*/
extern blkid_dev blkid_new_dev(void);
extern void blkid_free_dev(blkid_dev dev);
#ifdef __cplusplus
}
#endif
#endif /* _BLKID_BLKIDP_H */
|
