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v2.41
include/blkdev.h
177 строк
5 KB
Karel Zak
include/blkdev: share BLKDISCARD macros
17 сен 2024, 14:19
17 сен 2024, 14:19
123d4de
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/* * No copyright is claimed. This code is in the public domain; do with * it what you wish. * * Written by Karel Zak <kzak@redhat.com> */ #ifndef BLKDEV_H #define BLKDEV_H #include <sys/types.h> #include <sys/ioctl.h> #ifdef HAVE_SYS_IOCCOM_H # include <sys/ioccom.h> /* for _IO macro on e.g. Solaris */ #endif #include <fcntl.h> #include <unistd.h> #include <sys/stat.h> #include <stdint.h> #ifdef HAVE_SYS_MKDEV_H # include <sys/mkdev.h> /* major and minor on Solaris */ #endif #define DEFAULT_SECTOR_SIZE 512 #ifdef __linux__ /* very basic ioctls, should be available everywhere */ # ifndef BLKROSET # define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ # define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ # define BLKRRPART _IO(0x12,95) /* re-read partition table */ # define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ # define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ # define BLKRASET _IO(0x12,98) /* set read ahead for block device */ # define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ # define BLKFRASET _IO(0x12,100) /* set filesystem (mm/filemap.c) read-ahead */ # define BLKFRAGET _IO(0x12,101) /* get filesystem (mm/filemap.c) read-ahead */ # define BLKSECTSET _IO(0x12,102) /* set max sectors per request (ll_rw_blk.c) */ # define BLKSECTGET _IO(0x12,103) /* get max sectors per request (ll_rw_blk.c) */ # define BLKSSZGET _IO(0x12,104) /* get block device sector size */ /* ioctls introduced in 2.2.16, removed in 2.5.58 */ # define BLKELVGET _IOR(0x12,106,size_t) /* elevator get */ # define BLKELVSET _IOW(0x12,107,size_t) /* elevator set */ # define BLKBSZGET _IOR(0x12,112,size_t) # define BLKBSZSET _IOW(0x12,113,size_t) # endif /* !BLKROSET */ # ifndef BLKGETSIZE64 # define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ # endif /* block device topology ioctls, introduced in 2.6.32 (commit ac481c20) */ # ifndef BLKIOMIN # define BLKIOMIN _IO(0x12,120) # define BLKIOOPT _IO(0x12,121) # define BLKALIGNOFF _IO(0x12,122) # define BLKPBSZGET _IO(0x12,123) # endif /* discard area on a device */ #ifndef BLKDISCARD # define BLKDISCARD _IO(0x12,119) #endif #ifndef BLKSECDISCARD # define BLKSECDISCARD _IO(0x12,125) #endif #ifndef BLKZEROOUT # define BLKZEROOUT _IO(0x12,127) #endif /* discard zeroes support, introduced in 2.6.33 (commit 98262f27) */ # ifndef BLKDISCARDZEROES # define BLKDISCARDZEROES _IO(0x12,124) # endif /* disk sequence number, introduced in 5.15 (commit 7957d93b) */ # ifndef BLKGETDISKSEQ # define BLKGETDISKSEQ _IOR(0x12, 128, uint64_t) # endif /* filesystem freeze, introduced in 2.6.29 (commit fcccf502) */ # ifndef FIFREEZE # define FIFREEZE _IOWR('X', 119, int) /* Freeze */ # define FITHAW _IOWR('X', 120, int) /* Thaw */ # endif /* uniform CD-ROM information */ # ifndef CDROM_GET_CAPABILITY # define CDROM_GET_CAPABILITY 0x5331 # endif #endif /* __linux */ #ifdef APPLE_DARWIN # define BLKGETSIZE DKIOCGETBLOCKCOUNT32 #endif #ifndef HDIO_GETGEO # ifdef __linux__ # define HDIO_GETGEO 0x0301 # endif struct hd_geometry { unsigned char heads; unsigned char sectors; unsigned short cylinders; /* truncated */ unsigned long start; }; #endif /* HDIO_GETGEO */ /* are we working with block device? */ int is_blkdev(int fd); /* open block device or file */ int open_blkdev_or_file(const struct stat *st, const char *name, const int oflag); /* Determine size in bytes */ off_t blkdev_find_size (int fd); /* get size in bytes */ int blkdev_get_size(int fd, unsigned long long *bytes); /* get 512-byte sector count */ int blkdev_get_sectors(int fd, unsigned long long *sectors); /* get hardware sector size */ int blkdev_get_sector_size(int fd, int *sector_size); /* specifies whether or not the device is misaligned */ int blkdev_is_misaligned(int fd); /* get physical block device size */ int blkdev_get_physector_size(int fd, int *sector_size); /* is the device cdrom capable? */ int blkdev_is_cdrom(int fd); /* get device's geometry - legacy */ int blkdev_get_geometry(int fd, unsigned int *h, unsigned int *s); /* SCSI device types. Copied almost as-is from kernel header * (include/scsi/scsi_proto.h). */ #define SCSI_TYPE_DISK 0x00 #define SCSI_TYPE_TAPE 0x01 #define SCSI_TYPE_PRINTER 0x02 #define SCSI_TYPE_PROCESSOR 0x03 /* HP scanners use this */ #define SCSI_TYPE_WORM 0x04 /* Treated as ROM by our system */ #define SCSI_TYPE_ROM 0x05 #define SCSI_TYPE_SCANNER 0x06 #define SCSI_TYPE_MOD 0x07 /* Magneto-optical disk - treated as SCSI_TYPE_DISK */ #define SCSI_TYPE_MEDIUM_CHANGER 0x08 #define SCSI_TYPE_COMM 0x09 /* Communications device */ #define SCSI_TYPE_RAID 0x0c #define SCSI_TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ #define SCSI_TYPE_RBC 0x0e #define SCSI_TYPE_OSD 0x11 #define SCSI_TYPE_NO_LUN 0x7f /* convert scsi type code to name */ const char *blkdev_scsi_type_to_name(int type); int blkdev_lock(int fd, const char *devname, const char *lockmode); #ifdef HAVE_LINUX_BLKZONED_H struct blk_zone_report *blkdev_get_zonereport(int fd, uint64_t sector, uint32_t nzones); #else static inline struct blk_zone_report *blkdev_get_zonereport(int fd __attribute__((unused)), uint64_t sector __attribute__((unused)), uint32_t nzones __attribute__((unused))) { return NULL; } #endif #endif /* BLKDEV_H */