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-rw-r--r--libblkid/src/blkidP.h558
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diff --git a/libblkid/src/blkidP.h b/libblkid/src/blkidP.h
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+/*
+ * 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
+
+/* 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>
+
+#ifdef HAVE_LIBUUID
+# include <uuid.h>
+#else
+# define UUID_STR_LEN 37
+#endif
+
+#include "c.h"
+#include "bitops.h" /* $(top_srcdir)/include/ */
+#include "blkdev.h"
+
+#include "debug.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 real path (as used in cache) */
+ char *bid_xname; /* Device path as used by application (maybe symlink..) */
+ 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 *);
+};
+
+/* chains */
+extern const struct blkid_chaindrv superblocks_drv;
+extern const struct blkid_chaindrv topology_drv;
+extern const struct blkid_chaindrv partitions_drv;
+
+/*
+ * Low-level probe result
+ */
+struct blkid_prval
+{
+ const char *name; /* value name */
+ unsigned char *data; /* value data */
+ size_t len; /* length of value data */
+
+ struct blkid_chain *chain; /* owner */
+ struct list_head prvals; /* list of results */
+};
+
+/*
+ * 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;
+ uint64_t off;
+ uint64_t len;
+ struct list_head bufs; /* list of buffers */
+};
+
+/*
+ * Low-level probing control struct
+ */
+struct blkid_struct_probe
+{
+ int fd; /* device file descriptor */
+ uint64_t off; /* begin of data on the device */
+ uint64_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 library flags */
+ int prob_flags; /* always zeroized by blkid_do_*() */
+
+ uint64_t wipe_off; /* begin of the wiped area */
+ uint64_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 list_head values; /* results */
+
+ 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 */
+#define BLKID_FL_NOSCAN_DEV (1 << 4) /* do not scan this device */
+#define BLKID_FL_MODIF_BUFF (1 << 5) /* cached bufferes has been modified */
+
+/* private per-probing flags */
+#define BLKID_PROBE_FL_IGNORE_PT (1 << 1) /* ignore partition table */
+
+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_PROBE_OK 0
+#define BLKID_PROBE_NONE 1
+
+#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
+
+#define BLKID_DEBUG_HELP (1 << 0)
+#define BLKID_DEBUG_INIT (1 << 1)
+#define BLKID_DEBUG_CACHE (1 << 2)
+#define BLKID_DEBUG_CONFIG (1 << 3)
+#define BLKID_DEBUG_DEV (1 << 4)
+#define BLKID_DEBUG_DEVNAME (1 << 5)
+#define BLKID_DEBUG_DEVNO (1 << 6)
+#define BLKID_DEBUG_EVALUATE (1 << 7)
+#define BLKID_DEBUG_LOWPROBE (1 << 8)
+#define BLKID_DEBUG_PROBE (1 << 9)
+#define BLKID_DEBUG_READ (1 << 10)
+#define BLKID_DEBUG_SAVE (1 << 11)
+#define BLKID_DEBUG_TAG (1 << 12)
+#define BLKID_DEBUG_BUFFER (1 << 13)
+#define BLKID_DEBUG_ALL 0xFFFF /* (1 << 16) aka FFFF is expected by API */
+
+UL_DEBUG_DECLARE_MASK(libblkid);
+#define DBG(m, x) __UL_DBG(libblkid, BLKID_DEBUG_, m, x)
+#define ON_DBG(m, x) __UL_DBG_CALL(libblkid, BLKID_DEBUG_, m, x)
+
+#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(libblkid)
+#include "debugobj.h"
+
+extern void blkid_debug_dump_dev(blkid_dev dev);
+
+
+/* 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,
+ uint64_t off, uint64_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,
+ uint64_t *off, uint64_t *size)
+ __attribute__((nonnull));
+
+extern int blkid_probe_set_dimension(blkid_probe pr,
+ uint64_t off, uint64_t size)
+ __attribute__((nonnull));
+
+extern int blkid_probe_get_idmag(blkid_probe pr, const struct blkid_idinfo *id,
+ uint64_t *offset, const struct blkid_idmag **res)
+ __attribute__((nonnull(1)));
+
+/* returns superblock 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,
+ uint64_t offset, uint64_t size)
+ __attribute__((warn_unused_result));
+
+extern void blkid_probe_chain_reset_values(blkid_probe pr, struct blkid_chain *chn)
+ __attribute__((nonnull));
+extern int blkid_probe_chain_save_values(blkid_probe pr,
+ struct blkid_chain *chn,
+ struct list_head *vals)
+ __attribute__((nonnull));
+
+extern struct blkid_prval *blkid_probe_assign_value(blkid_probe pr,
+ const char *name)
+ __attribute__((nonnull))
+ __attribute__((warn_unused_result));
+
+extern void blkid_probe_free_value(struct blkid_prval *v);
+
+
+extern void blkid_probe_append_values_list(blkid_probe pr,
+ struct list_head *vals)
+ __attribute__((nonnull));
+
+extern void blkid_probe_free_values_list(struct list_head *vals);
+
+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 struct blkid_prval *blkid_probe_new_val(void)
+ __attribute__((warn_unused_result));
+extern int blkid_probe_set_value(blkid_probe pr, const char *name,
+ const unsigned char *data, size_t len)
+ __attribute__((nonnull));
+extern int blkid_probe_value_set_data(struct blkid_prval *v,
+ const 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, uint64_t offset,
+ size_t len, const unsigned char *magic)
+ __attribute__((nonnull));
+
+extern int blkid_probe_verify_csum(blkid_probe pr, uint64_t csum, uint64_t expected)
+ __attribute__((nonnull));
+
+extern void blkid_unparse_uuid(const unsigned char *uuid, char *str, size_t len)
+ __attribute__((nonnull));
+extern int blkid_uuid_is_empty(const unsigned char *buf, size_t len);
+
+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, uint64_t off,
+ uint64_t size)
+ __attribute__((nonnull));
+extern int blkid_probe_is_wiped(blkid_probe pr, struct blkid_chain **chn,
+ uint64_t off, uint64_t size)
+ __attribute__((nonnull))
+ __attribute__((warn_unused_result));
+extern void blkid_probe_use_wiper(blkid_probe pr, uint64_t off, uint64_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 unsigned char *blkid_encode_alloc(size_t count, size_t *reslen);
+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
+#define BLKID_ENC_LATIN1 2
+
+#endif /* _BLKID_BLKIDP_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 01:23:14 +0000