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160 lines
4.9 KiB
160 lines
4.9 KiB
/* |
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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 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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/* 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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* http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/scsi/scsi.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, uint64_t sector, uint32_t nzones) |
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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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