Adding upstream version 2.41.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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177
include/blkdev.h
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177
include/blkdev.h
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/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*
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* Written by Karel Zak <kzak@redhat.com>
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*/
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#ifndef BLKDEV_H
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#define BLKDEV_H
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#ifdef HAVE_SYS_IOCCOM_H
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# include <sys/ioccom.h> /* for _IO macro on e.g. Solaris */
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#endif
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <stdint.h>
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#ifdef HAVE_SYS_MKDEV_H
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# include <sys/mkdev.h> /* major and minor on Solaris */
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#endif
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#define DEFAULT_SECTOR_SIZE 512
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#ifdef __linux__
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/* very basic ioctls, should be available everywhere */
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# ifndef BLKROSET
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# define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
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# define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
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# define BLKRRPART _IO(0x12,95) /* re-read partition table */
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# define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
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# define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
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# define BLKRASET _IO(0x12,98) /* set read ahead for block device */
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# define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
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# define BLKFRASET _IO(0x12,100) /* set filesystem (mm/filemap.c) read-ahead */
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# define BLKFRAGET _IO(0x12,101) /* get filesystem (mm/filemap.c) read-ahead */
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# define BLKSECTSET _IO(0x12,102) /* set max sectors per request (ll_rw_blk.c) */
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# define BLKSECTGET _IO(0x12,103) /* get max sectors per request (ll_rw_blk.c) */
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# define BLKSSZGET _IO(0x12,104) /* get block device sector size */
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/* ioctls introduced in 2.2.16, removed in 2.5.58 */
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# define BLKELVGET _IOR(0x12,106,size_t) /* elevator get */
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# define BLKELVSET _IOW(0x12,107,size_t) /* elevator set */
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# define BLKBSZGET _IOR(0x12,112,size_t)
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# define BLKBSZSET _IOW(0x12,113,size_t)
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# endif /* !BLKROSET */
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# ifndef BLKGETSIZE64
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# define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
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# endif
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/* block device topology ioctls, introduced in 2.6.32 (commit ac481c20) */
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# ifndef BLKIOMIN
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# define BLKIOMIN _IO(0x12,120)
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# define BLKIOOPT _IO(0x12,121)
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# define BLKALIGNOFF _IO(0x12,122)
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# define BLKPBSZGET _IO(0x12,123)
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# endif
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/* discard area on a device */
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#ifndef BLKDISCARD
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# define BLKDISCARD _IO(0x12,119)
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#endif
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#ifndef BLKSECDISCARD
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# define BLKSECDISCARD _IO(0x12,125)
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#endif
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#ifndef BLKZEROOUT
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# define BLKZEROOUT _IO(0x12,127)
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#endif
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/* discard zeroes support, introduced in 2.6.33 (commit 98262f27) */
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# ifndef BLKDISCARDZEROES
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# define BLKDISCARDZEROES _IO(0x12,124)
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# endif
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/* disk sequence number, introduced in 5.15 (commit 7957d93b) */
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# ifndef BLKGETDISKSEQ
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# define BLKGETDISKSEQ _IOR(0x12, 128, uint64_t)
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# endif
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/* filesystem freeze, introduced in 2.6.29 (commit fcccf502) */
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# ifndef FIFREEZE
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# define FIFREEZE _IOWR('X', 119, int) /* Freeze */
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# define FITHAW _IOWR('X', 120, int) /* Thaw */
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# endif
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/* uniform CD-ROM information */
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# ifndef CDROM_GET_CAPABILITY
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# define CDROM_GET_CAPABILITY 0x5331
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# endif
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#endif /* __linux */
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#ifdef APPLE_DARWIN
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# define BLKGETSIZE DKIOCGETBLOCKCOUNT32
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#endif
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#ifndef HDIO_GETGEO
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# ifdef __linux__
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# define HDIO_GETGEO 0x0301
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# endif
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struct hd_geometry {
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders; /* truncated */
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unsigned long start;
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};
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#endif /* HDIO_GETGEO */
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/* are we working with block device? */
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int is_blkdev(int fd);
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/* open block device or file */
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int open_blkdev_or_file(const struct stat *st, const char *name, const int oflag);
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/* Determine size in bytes */
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off_t blkdev_find_size (int fd);
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/* get size in bytes */
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int blkdev_get_size(int fd, unsigned long long *bytes);
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/* get 512-byte sector count */
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int blkdev_get_sectors(int fd, unsigned long long *sectors);
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/* get hardware sector size */
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int blkdev_get_sector_size(int fd, int *sector_size);
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/* specifies whether or not the device is misaligned */
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int blkdev_is_misaligned(int fd);
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/* get physical block device size */
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int blkdev_get_physector_size(int fd, int *sector_size);
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/* is the device cdrom capable? */
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int blkdev_is_cdrom(int fd);
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/* get device's geometry - legacy */
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int blkdev_get_geometry(int fd, unsigned int *h, unsigned int *s);
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/* SCSI device types. Copied almost as-is from kernel header
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* (include/scsi/scsi_proto.h). */
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#define SCSI_TYPE_DISK 0x00
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#define SCSI_TYPE_TAPE 0x01
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#define SCSI_TYPE_PRINTER 0x02
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#define SCSI_TYPE_PROCESSOR 0x03 /* HP scanners use this */
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#define SCSI_TYPE_WORM 0x04 /* Treated as ROM by our system */
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#define SCSI_TYPE_ROM 0x05
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#define SCSI_TYPE_SCANNER 0x06
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#define SCSI_TYPE_MOD 0x07 /* Magneto-optical disk - treated as SCSI_TYPE_DISK */
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#define SCSI_TYPE_MEDIUM_CHANGER 0x08
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#define SCSI_TYPE_COMM 0x09 /* Communications device */
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#define SCSI_TYPE_RAID 0x0c
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#define SCSI_TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
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#define SCSI_TYPE_RBC 0x0e
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#define SCSI_TYPE_OSD 0x11
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#define SCSI_TYPE_NO_LUN 0x7f
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/* convert scsi type code to name */
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const char *blkdev_scsi_type_to_name(int type);
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int blkdev_lock(int fd, const char *devname, const char *lockmode);
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#ifdef HAVE_LINUX_BLKZONED_H
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struct blk_zone_report *blkdev_get_zonereport(int fd, uint64_t sector, uint32_t nzones);
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#else
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static inline struct blk_zone_report *blkdev_get_zonereport(int fd __attribute__((unused)),
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uint64_t sector __attribute__((unused)),
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uint32_t nzones __attribute__((unused)))
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{
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return NULL;
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}
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#endif
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#endif /* BLKDEV_H */
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