source: MondoRescue/branches/stable/mindi-busybox/e2fsprogs/blkid/blkidP.h @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 5.3 KB
Line 
1/*
2 * blkidP.h - Internal interfaces for libblkid
3 *
4 * Copyright (C) 2001 Andreas Dilger
5 * Copyright (C) 2003 Theodore Ts'o
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the
9 * GNU Lesser General Public License.
10 * %End-Header%
11 */
12
13#ifndef _BLKID_BLKIDP_H
14#define _BLKID_BLKIDP_H
15
16#include <sys/types.h>
17#include <stdio.h>
18
19#include "blkid.h"
20#include "list.h"
21
22#ifdef __GNUC__
23#define __BLKID_ATTR(x) __attribute__(x)
24#else
25#define __BLKID_ATTR(x)
26#endif
27
28
29/*
30 * This describes the attributes of a specific device.
31 * We can traverse all of the tags by bid_tags (linking to the tag bit_names).
32 * The bid_label and bid_uuid fields are shortcuts to the LABEL and UUID tag
33 * values, if they exist.
34 */
35struct blkid_struct_dev
36{
37    struct list_head    bid_devs;   /* All devices in the cache */
38    struct list_head    bid_tags;   /* All tags for this device */
39    blkid_cache     bid_cache;  /* Dev belongs to this cache */
40    char            *bid_name;  /* Device inode pathname */
41    char            *bid_type;  /* Preferred device TYPE */
42    int         bid_pri;    /* Device priority */
43    dev_t           bid_devno;  /* Device major/minor number */
44    time_t          bid_time;   /* Last update time of device */
45    unsigned int        bid_flags;  /* Device status bitflags */
46    char            *bid_label; /* Shortcut to device LABEL */
47    char            *bid_uuid;  /* Shortcut to binary UUID */
48};
49
50#define BLKID_BID_FL_VERIFIED   0x0001  /* Device data validated from disk */
51#define BLKID_BID_FL_INVALID    0x0004  /* Device is invalid */
52
53/*
54 * Each tag defines a NAME=value pair for a particular device.  The tags
55 * are linked via bit_names for a single device, so that traversing the
56 * names list will get you a list of all tags associated with a device.
57 * They are also linked via bit_values for all devices, so one can easily
58 * search all tags with a given NAME for a specific value.
59 */
60struct blkid_struct_tag
61{
62    struct list_head    bit_tags;   /* All tags for this device */
63    struct list_head    bit_names;  /* All tags with given NAME */
64    char            *bit_name;  /* NAME of tag (shared) */
65    char            *bit_val;   /* value of tag */
66    blkid_dev       bit_dev;    /* pointer to device */
67};
68typedef struct blkid_struct_tag *blkid_tag;
69
70/*
71 * Minimum number of seconds between device probes, even when reading
72 * from the cache.  This is to avoid re-probing all devices which were
73 * just probed by another program that does not share the cache.
74 */
75#define BLKID_PROBE_MIN     2
76
77/*
78 * Time in seconds an entry remains verified in the in-memory cache
79 * before being reverified (in case of long-running processes that
80 * keep a cache in memory and continue to use it for a long time).
81 */
82#define BLKID_PROBE_INTERVAL    200
83
84/* This describes an entire blkid cache file and probed devices.
85 * We can traverse all of the found devices via bic_list.
86 * We can traverse all of the tag types by bic_tags, which hold empty tags
87 * for each tag type.  Those tags can be used as list_heads for iterating
88 * through all devices with a specific tag type (e.g. LABEL).
89 */
90struct blkid_struct_cache
91{
92    struct list_head    bic_devs;   /* List head of all devices */
93    struct list_head    bic_tags;   /* List head of all tag types */
94    time_t          bic_time;   /* Last probe time */
95    time_t          bic_ftime;  /* Mod time of the cachefile */
96    unsigned int        bic_flags;  /* Status flags of the cache */
97    char            *bic_filename;  /* filename of cache */
98};
99
100#define BLKID_BIC_FL_PROBED 0x0002  /* We probed /proc/partition devices */
101#define BLKID_BIC_FL_CHANGED    0x0004  /* Cache has changed from disk */
102
103extern char *blkid_strdup(const char *s);
104extern char *blkid_strndup(const char *s, const int length);
105
106#define BLKID_CACHE_FILE "/etc/blkid.tab"
107extern const char *blkid_devdirs[];
108
109#define BLKID_ERR_IO     5
110#define BLKID_ERR_PROC   9
111#define BLKID_ERR_MEM   12
112#define BLKID_ERR_CACHE 14
113#define BLKID_ERR_DEV   19
114#define BLKID_ERR_PARAM 22
115#define BLKID_ERR_BIG   27
116
117/*
118 * Priority settings for different types of devices
119 */
120#define BLKID_PRI_EVMS  30
121#define BLKID_PRI_LVM   20
122#define BLKID_PRI_MD    10
123
124#if defined(TEST_PROGRAM) && !defined(CONFIG_BLKID_DEBUG)
125#define CONFIG_BLKID_DEBUG
126#endif
127
128#define DEBUG_CACHE 0x0001
129#define DEBUG_DUMP  0x0002
130#define DEBUG_DEV   0x0004
131#define DEBUG_DEVNAME   0x0008
132#define DEBUG_DEVNO 0x0010
133#define DEBUG_PROBE 0x0020
134#define DEBUG_READ  0x0040
135#define DEBUG_RESOLVE   0x0080
136#define DEBUG_SAVE  0x0100
137#define DEBUG_TAG   0x0200
138#define DEBUG_INIT  0x8000
139#define DEBUG_ALL   0xFFFF
140
141#ifdef CONFIG_BLKID_DEBUG
142#include <stdio.h>
143extern int      blkid_debug_mask;
144#define DBG(m,x)    if ((m) & blkid_debug_mask) x;
145#else
146#define DBG(m,x)
147#endif
148
149#ifdef CONFIG_BLKID_DEBUG
150extern void blkid_debug_dump_dev(blkid_dev dev);
151extern void blkid_debug_dump_tag(blkid_tag tag);
152#endif
153
154/* lseek.c */
155/* extern blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int whence); */
156#ifdef CONFIG_LFS
157# define blkid_llseek lseek64
158#else
159# define blkid_llseek lseek
160#endif
161
162/* read.c */
163extern void blkid_read_cache(blkid_cache cache);
164
165/* save.c */
166extern int blkid_flush_cache(blkid_cache cache);
167
168/*
169 * Functions to create and find a specific tag type: tag.c
170 */
171extern void blkid_free_tag(blkid_tag tag);
172extern blkid_tag blkid_find_tag_dev(blkid_dev dev, const char *type);
173extern int blkid_set_tag(blkid_dev dev, const char *name,
174             const char *value, const int vlength);
175
176/*
177 * Functions to create and find a specific tag type: dev.c
178 */
179extern blkid_dev blkid_new_dev(void);
180extern void blkid_free_dev(blkid_dev dev);
181
182#ifdef __cplusplus
183}
184#endif
185
186#endif /* _BLKID_BLKIDP_H */
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