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Diffstat (limited to 'shlibs/blkid/src/blkidP.h')
| -rw-r--r-- | shlibs/blkid/src/blkidP.h | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/shlibs/blkid/src/blkidP.h b/shlibs/blkid/src/blkidP.h new file mode 100644 index 000000000..4131c5bba --- /dev/null +++ b/shlibs/blkid/src/blkidP.h @@ -0,0 +1,343 @@ +/* + * 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 + + +#define CONFIG_BLKID_DEBUG 1 + +#include <sys/types.h> +#include <stdio.h> + +#include "bitops.h" /* $(top_srcdir)/include/ */ +#include "blkid.h" +#include "list.h" + +#ifdef __GNUC__ +#define __BLKID_ATTR(x) __attribute__(x) +#else +#define __BLKID_ATTR(x) +#endif + +#ifndef TRUE +#define TRUE 1 +#define FALSE 1 +#endif + +#include <limits.h> +#ifndef PATH_MAX +# define PATH_MAX 4096 +#endif + +/* TODO: move to some top-level util-linux include file */ +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) +#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; + +/* + * Low-level probe result + */ +#define BLKID_PROBVAL_BUFSIZ 64 +#define BLKID_PROBVAL_NVALS 8 /* see blkid.h BLKID_PROBREQ_* */ + +struct blkid_prval +{ + const char *name; /* value name */ + unsigned char data[BLKID_PROBVAL_BUFSIZ]; /* value data */ + size_t len; /* length of value data */ +}; + +/* + * Low-level probing control struct + */ +struct blkid_struct_probe +{ + int fd; /* device file descriptor */ + blkid_loff_t off; /* begin of data on the device */ + blkid_loff_t size; /* end of data on the device */ + + unsigned char *sbbuf; /* superblok buffer */ + size_t sbbuf_len; /* size of data in superblock buffer */ + + unsigned char *buf; /* seek buffer */ + blkid_loff_t buf_off; /* offset of seek buffer */ + size_t buf_len; /* size of data in seek buffer */ + size_t buf_max; /* allocated size of seek buffer */ + + struct blkid_prval vals[BLKID_PROBVAL_NVALS]; + int nvals; + + int probreq; /* BLKID_PROBREQ_* flags */ + int idx; /* index of the last prober */ + + unsigned long *fltr; /* filter */ +}; + +#define BLKID_SB_BUFSIZ 0x11000 + +/* + * Filesystem / Raid magic strings + */ +struct blkid_idmag +{ + const char *magic; /* magic string */ + unsigned len; /* length of magic */ + + long kboff; /* kilobyte offset of superblock */ + unsigned sboff; /* byte offset within superblock */ +}; + +/* + * Filesystem / Raid description + */ +struct blkid_idinfo +{ + const char *name; /* FS/RAID name */ + int usage; /* BLKID_USAGE_* flag */ + int flags; /* BLKID_IDINFO_* flags */ + + /* probe function */ + int (*probefunc)(blkid_probe pr, const struct blkid_idmag *mag); + + struct blkid_idmag magics[]; /* NULL or array with magic strings */ +}; + +#define BLKID_NONE_MAGIC {{ NULL }} + +/* + * tolerant FS - can share the same device with more filesystems (e.g. typical + * on CD-ROMs). We need this flag to detect ambivalent results (e.g. valid fat + * and valid linux swap on the same device). + */ +#define BLKID_IDINFO_TOLERANT (1 << 1) + +/* + * Evaluation methods (for blkid_eval_* API) + */ +enum { + BLKID_EVAL_UDEV = 0, + BLKID_EVAL_SCAN, + + __BLKID_EVAL_LAST +}; + +/* + * Library config options + */ +struct blkid_config { + int eval[__BLKID_EVAL_LAST]; /* array with EVALUATION=<udev,cache> options */ + int nevals; /* number of elems in eval array */ + int uevent; /* SEND_UEVENT=<yes|not> option */ + char *cachefile; /* CACHE_FILE=<path> option */ +}; + +extern struct blkid_config *blkid_read_config(const char *filename); +extern void blkid_free_config(struct blkid_config *conf); + +/* + * 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 */ + blkid_probe probe; /* low-level probing stuff */ +}; + +#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_CONFIG_FILE "/etc/blkid.conf" + +#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_LOWPROBE 0x0400 +#define DEBUG_CONFIG 0x0800 +#define DEBUG_EVALUATE 0x1000 +#define DEBUG_INIT 0x8000 +#define DEBUG_ALL 0xFFFF + +#ifdef CONFIG_BLKID_DEBUG +#include <stdio.h> +extern int blkid_debug_mask; +extern void blkid_init_debug(int mask); +extern void blkid_debug_dump_dev(blkid_dev dev); +extern void blkid_debug_dump_tag(blkid_tag tag); + +#define DBG(m,x) if ((m) & blkid_debug_mask) x; + +#else /* !CONFIG_BLKID_DEBUG */ +#define DBG(m,x) +#define blkid_init_debug(x) +#endif /* CONFIG_BLKID_DEBUG */ + +/* devno.c */ +struct dir_list { + char *name; + struct dir_list *next; +}; +extern void blkid__scan_dir(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); + +/* cache */ +extern char *blkid_safe_getenv(const char *arg); +extern char *blkid_get_cache_filename(struct blkid_config *conf); + +/* + * 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); + +/* probe.c */ +unsigned char *blkid_probe_get_buffer(blkid_probe pr, + blkid_loff_t off, blkid_loff_t len); + +/* returns superblok according to 'struct blkid_idmag' */ +#define blkid_probe_get_sb(_pr, _mag, type) \ + ((type *) blkid_probe_get_buffer((_pr),\ + (_mag)->kboff << 10, sizeof(type))) + +extern int blkid_probe_set_value(blkid_probe pr, const char *name, + unsigned char *data, size_t len); +extern int blkid_probe_vsprintf_value(blkid_probe pr, const char *name, + const char *fmt, va_list ap); +extern int blkid_probe_set_version(blkid_probe pr, const char *version); +extern int blkid_probe_sprintf_version(blkid_probe pr, const char *fmt, ...) + __attribute__ ((format (printf, 2, 3))); + +extern int blkid_probe_set_label(blkid_probe pr, unsigned char *label, size_t len); +extern int blkid_probe_set_utf8label(blkid_probe pr, unsigned char *label, + size_t len, int enc); +extern int blkid_probe_sprintf_uuid(blkid_probe pr, unsigned char *uuid, + size_t len, const char *fmt, ...) + __attribute__ ((format (printf, 4, 5))); +extern int blkid_probe_strncpy_uuid(blkid_probe pr, unsigned char *str, size_t len); + +extern int blkid_probe_set_uuid(blkid_probe pr, unsigned char *uuid); +extern int blkid_probe_set_uuid_as(blkid_probe pr, unsigned char *uuid, const char *name); + +#define BLKID_ENC_UTF16BE 0 +#define BLKID_ENC_UTF16LE 1 + +#endif /* _BLKID_BLKIDP_H */ |