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Diffstat (limited to '')
| -rw-r--r-- | libblkid/blkidP.h | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/libblkid/blkidP.h b/libblkid/blkidP.h deleted file mode 100644 index 2d5e8cb78..000000000 --- a/libblkid/blkidP.h +++ /dev/null @@ -1,551 +0,0 @@ -/* - * 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 - -/* support debug output if LIBBLKID_DEBUG env. variable is set */ -#define CONFIG_BLKID_DEBUG 1 - -/* Always confirm that /dev/disk-by symlinks match with LABEL/UUID on device */ -/* #define CONFIG_BLKID_VERIFY_UDEV 1 */ - -#include <sys/types.h> -#include <dirent.h> -#include <sys/stat.h> -#include <stdio.h> -#include <stdarg.h> -#include <stdint.h> - -#include "c.h" -#include "bitops.h" /* $(top_srcdir)/include/ */ -#include "blkdev.h" - -#include "blkid.h" -#include "list.h" - -/* - * 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 */ - suseconds_t bid_utime; /* Last update time (microseconds) */ - 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 */ -#define BLKID_BID_FL_REMOVABLE 0x0008 /* Device added by blkid_probe_all_removable() */ - -/* - * 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; - -/* - * Chain IDs - */ -enum { - BLKID_CHAIN_SUBLKS, /* FS/RAID superblocks (enabled by default) */ - BLKID_CHAIN_TOPLGY, /* Block device topology */ - BLKID_CHAIN_PARTS, /* Partition tables */ - - BLKID_NCHAINS /* number of chains */ -}; - -struct blkid_chain { - const struct blkid_chaindrv *driver; /* chain driver */ - - int enabled; /* boolean */ - int flags; /* BLKID_<chain>_* */ - int binary; /* boolean */ - int idx; /* index of the current prober (or -1) */ - unsigned long *fltr; /* filter or NULL */ - void *data; /* private chain data or NULL */ -}; - -/* - * Chain driver - */ -struct blkid_chaindrv { - const size_t id; /* BLKID_CHAIN_* */ - const char *name; /* name of chain (for debug purpose) */ - const int dflt_flags; /* default chain flags */ - const int dflt_enabled; /* default enabled boolean */ - int has_fltr; /* boolean */ - - const struct blkid_idinfo **idinfos; /* description of probing functions */ - const size_t nidinfos; /* number of idinfos */ - - /* driver operations */ - int (*probe)(blkid_probe, struct blkid_chain *); - int (*safeprobe)(blkid_probe, struct blkid_chain *); - void (*free_data)(blkid_probe, void *); -}; - -/* - * Low-level probe result - */ -#define BLKID_PROBVAL_BUFSIZ 128 - -#define BLKID_NVALS_SUBLKS 18 -#define BLKID_NVALS_TOPLGY 5 -#define BLKID_NVALS_PARTS 13 - -/* Max number of all values in probing result */ -#define BLKID_NVALS (BLKID_NVALS_SUBLKS + \ - BLKID_NVALS_TOPLGY + \ - BLKID_NVALS_PARTS) - -struct blkid_prval -{ - const char *name; /* value name */ - unsigned char data[BLKID_PROBVAL_BUFSIZ]; /* value data */ - size_t len; /* length of value data */ - - struct blkid_chain *chain; /* owner */ -}; - -/* - * Filesystem / Raid magic strings - */ -struct blkid_idmag -{ - const char *magic; /* magic string */ - unsigned int len; /* length of magic */ - - long kboff; /* kilobyte offset of superblock */ - unsigned int sboff; /* byte offset within superblock */ -}; - -/* - * Filesystem / Raid description - */ -struct blkid_idinfo -{ - const char *name; /* fs, raid or partition table name */ - int usage; /* BLKID_USAGE_* flag */ - int flags; /* BLKID_IDINFO_* flags */ - int minsz; /* minimal device size */ - - /* 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) - -struct blkid_bufinfo { - unsigned char *data; - blkid_loff_t off; - blkid_loff_t len; - struct list_head bufs; /* list of buffers */ -}; - -/* - * 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 */ - - dev_t devno; /* device number (st.st_rdev) */ - dev_t disk_devno; /* devno of the whole-disk or 0 */ - unsigned int blkssz; /* sector size (BLKSSZGET ioctl) */ - mode_t mode; /* struct stat.sb_mode */ - - int flags; /* private libray flags */ - int prob_flags; /* always zeroized by blkid_do_*() */ - - blkid_loff_t wipe_off; /* begin of the wiped area */ - blkid_loff_t wipe_size; /* size of the wiped area */ - struct blkid_chain *wipe_chain; /* superblock, partition, ... */ - - struct list_head buffers; /* list of buffers */ - - struct blkid_chain chains[BLKID_NCHAINS]; /* array of chains */ - struct blkid_chain *cur_chain; /* current chain */ - - struct blkid_prval vals[BLKID_NVALS]; /* results */ - int nvals; /* number of assigned vals */ - - struct blkid_struct_probe *parent; /* for clones */ - struct blkid_struct_probe *disk_probe; /* whole-disk probing */ -}; - -/* private flags library flags */ -#define BLKID_FL_PRIVATE_FD (1 << 1) /* see blkid_new_probe_from_filename() */ -#define BLKID_FL_TINY_DEV (1 << 2) /* <= 1.47MiB (floppy or so) */ -#define BLKID_FL_CDROM_DEV (1 << 3) /* is a CD/DVD drive */ - -/* private per-probing flags */ -#define BLKID_PROBE_FL_IGNORE_PT (1 << 1) /* ignore partition table */ -#define BLKID_PROBE_FL_IGNORE_BACKUP (1 << 2) /* ignore backup superblocks or PT */ - -extern int blkid_probe_ignore_backup(blkid_probe pr); - -extern blkid_probe blkid_clone_probe(blkid_probe parent); -extern blkid_probe blkid_probe_get_wholedisk_probe(blkid_probe pr); - -/* - * 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) - __ul_attribute__((warn_unused_result)); -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 */ - -/* config file */ -#define BLKID_CONFIG_FILE "/etc/blkid.conf" - -/* cache file on systemds with /run */ -#define BLKID_RUNTIME_TOPDIR "/run" -#define BLKID_RUNTIME_DIR BLKID_RUNTIME_TOPDIR "/blkid" -#define BLKID_CACHE_FILE BLKID_RUNTIME_DIR "/blkid.tab" - -/* old systems */ -#define BLKID_CACHE_FILE_OLD "/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_UBI 50 -#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 -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) do { if ((m) & blkid_debug_mask) x; } while (0) - -#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 **) - __attribute__((nonnull(1,4))); -extern int blkid_driver_has_major(const char *drvname, int major) - __attribute__((warn_unused_result)); - -/* 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) - __attribute__((nonnull)); - -/* save.c */ -extern int blkid_flush_cache(blkid_cache cache) - __attribute__((nonnull)); - -/* cache */ -extern char *blkid_safe_getenv(const char *arg) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern char *blkid_get_cache_filename(struct blkid_config *conf) - __attribute__((warn_unused_result)); -/* - * 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) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int blkid_set_tag(blkid_dev dev, const char *name, - const char *value, const int vlength) - __attribute__((nonnull(1,2))); - -/* - * Functions to create and find a specific tag type: dev.c - */ -extern blkid_dev blkid_new_dev(void) - __attribute__((warn_unused_result)); -extern void blkid_free_dev(blkid_dev dev); - -/* probe.c */ -extern int blkid_probe_is_tiny(blkid_probe pr) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); -extern int blkid_probe_is_cdrom(blkid_probe pr) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern unsigned char *blkid_probe_get_buffer(blkid_probe pr, - blkid_loff_t off, blkid_loff_t len) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern unsigned char *blkid_probe_get_sector(blkid_probe pr, unsigned int sector) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int blkid_probe_get_dimension(blkid_probe pr, - blkid_loff_t *off, blkid_loff_t *size) - __attribute__((nonnull)); - -extern int blkid_probe_set_dimension(blkid_probe pr, - blkid_loff_t off, blkid_loff_t size) - __attribute__((nonnull)); - -extern int blkid_probe_get_idmag(blkid_probe pr, const struct blkid_idinfo *id, - blkid_loff_t *offset, const struct blkid_idmag **res) - __attribute__((nonnull(1))); - -/* 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 blkid_partlist blkid_probe_get_partlist(blkid_probe pr) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int blkid_probe_is_covered_by_pt(blkid_probe pr, - blkid_loff_t offset, blkid_loff_t size) - __attribute__((warn_unused_result)); - -extern void blkid_probe_chain_reset_vals(blkid_probe pr, struct blkid_chain *chn) - __attribute__((nonnull)); -extern int blkid_probe_chain_copy_vals(blkid_probe pr, - struct blkid_chain *chn, - struct blkid_prval *vals, - int nvals) - __attribute__((nonnull)); - -extern struct blkid_prval *blkid_probe_assign_value(blkid_probe pr, - const char *name) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int blkid_probe_reset_last_value(blkid_probe pr) - __attribute__((nonnull)); -extern void blkid_probe_append_vals(blkid_probe pr, - struct blkid_prval *vals, - int nvals) - __attribute__((nonnull)); - -extern struct blkid_chain *blkid_probe_get_chain(blkid_probe pr) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern struct blkid_prval *__blkid_probe_get_value(blkid_probe pr, int num) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern struct blkid_prval *__blkid_probe_lookup_value(blkid_probe pr, const char *name) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern unsigned long *blkid_probe_get_filter(blkid_probe pr, int chain, int create) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int __blkid_probe_invert_filter(blkid_probe pr, int chain) - __attribute__((nonnull)); -extern int __blkid_probe_reset_filter(blkid_probe pr, int chain) - __attribute__((nonnull)); -extern int __blkid_probe_filter_types(blkid_probe pr, int chain, int flag, char *names[]) - __attribute__((nonnull)); - -extern void *blkid_probe_get_binary_data(blkid_probe pr, struct blkid_chain *chn) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); - -extern int blkid_probe_set_value(blkid_probe pr, const char *name, - unsigned char *data, size_t len) - __attribute__((nonnull)); - -extern int blkid_probe_vsprintf_value(blkid_probe pr, const char *name, - const char *fmt, va_list ap) - __attribute__((nonnull)); - -extern int blkid_probe_sprintf_value(blkid_probe pr, const char *name, - const char *fmt, ...) - __attribute__((nonnull)) - __attribute__ ((__format__ (__printf__, 3, 4))); - -extern int blkid_probe_set_magic(blkid_probe pr, blkid_loff_t offset, - size_t len, unsigned char *magic) - __attribute__((nonnull)); - -extern void blkid_unparse_uuid(const unsigned char *uuid, char *str, size_t len) - __attribute__((nonnull)); -extern size_t blkid_rtrim_whitespace(unsigned char *str) - __attribute__((nonnull)); -extern size_t blkid_ltrim_whitespace(unsigned char *str) - __attribute__((nonnull)); - -extern void blkid_probe_set_wiper(blkid_probe pr, blkid_loff_t off, - blkid_loff_t size) - __attribute__((nonnull)); -extern int blkid_probe_is_wiped(blkid_probe pr, struct blkid_chain **chn, - blkid_loff_t off, blkid_loff_t size) - __attribute__((nonnull)) - __attribute__((warn_unused_result)); -extern void blkid_probe_use_wiper(blkid_probe pr, blkid_loff_t off, blkid_loff_t size) - __attribute__((nonnull)); - -/* filter bitmap macros */ -#define blkid_bmp_wordsize (8 * sizeof(unsigned long)) -#define blkid_bmp_idx_bit(item) (1UL << ((item) % blkid_bmp_wordsize)) -#define blkid_bmp_idx_byte(item) ((item) / blkid_bmp_wordsize) - -#define blkid_bmp_set_item(bmp, item) \ - ((bmp)[ blkid_bmp_idx_byte(item) ] |= blkid_bmp_idx_bit(item)) - -#define blkid_bmp_unset_item(bmp, item) \ - ((bmp)[ blkid_bmp_idx_byte(item) ] &= ~blkid_bmp_idx_bit(item)) - -#define blkid_bmp_get_item(bmp, item) \ - ((bmp)[ blkid_bmp_idx_byte(item) ] & blkid_bmp_idx_bit(item)) - -#define blkid_bmp_nwords(max_items) \ - (((max_items) + blkid_bmp_wordsize) / blkid_bmp_wordsize) - -#define blkid_bmp_nbytes(max_items) \ - (blkid_bmp_nwords(max_items) * sizeof(unsigned long)) - -/* encode.c */ -extern size_t blkid_encode_to_utf8(int enc, unsigned char *dest, size_t len, - const unsigned char *src, size_t count) - __attribute__((nonnull)); - -#define BLKID_ENC_UTF16BE 0 -#define BLKID_ENC_UTF16LE 1 - -#endif /* _BLKID_BLKIDP_H */ |