188 lines
5.4 KiB
C
188 lines
5.4 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* 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>
|
|
|
|
#include "blkid.h"
|
|
#include "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"
|
|
extern const char *blkid_devdirs[];
|
|
|
|
#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_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
|
|
|
|
/* lseek.c */
|
|
/* extern blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int whence); */
|
|
#ifdef CONFIG_LFS
|
|
# define blkid_llseek lseek64
|
|
#else
|
|
# define blkid_llseek lseek
|
|
#endif
|
|
|
|
/* 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 */
|