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| author | Stefan Krah | 2007-11-07 12:37:30 +0100 |
|---|---|---|
| committer | Karel Zak | 2007-11-07 12:37:30 +0100 |
| commit | 3738a48e0889cf5d99353432bc9d425258e8e350 (patch) | |
| tree | 06aeb8b6c5ec32fcc43c643805c8231c2f39c073 /include/blkdev.h | |
| parent | mkswap: linux_version() code consolidation (diff) | |
| download | kernel-qcow2-util-linux-3738a48e0889cf5d99353432bc9d425258e8e350.tar.gz kernel-qcow2-util-linux-3738a48e0889cf5d99353432bc9d425258e8e350.tar.xz kernel-qcow2-util-linux-3738a48e0889cf5d99353432bc9d425258e8e350.zip | |
lib: add blkdev.{c,h}
Now we duplicate BLK* ioctls on many places... This patch also
fix BLKGETSIZE64 usage in dependence on kernel version.
Co-Author: Karel Zak <kzak@redhat.com>
Signed-off-by: Stefan Krah <stefan@bytereef.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'include/blkdev.h')
| -rw-r--r-- | include/blkdev.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/blkdev.h b/include/blkdev.h new file mode 100644 index 000000000..8065acc1e --- /dev/null +++ b/include/blkdev.h @@ -0,0 +1,55 @@ +#ifndef BLKDEV_H +#define BLKDEV_H + +#include <sys/types.h> +#include <sys/ioctl.h> + +#define DEFAULT_SECTOR_SIZE 512 + +#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 */ + +#define BLKELVGET _IOR(0x12,106,size_t) /* elevator get */ +#define BLKELVSET _IOW(0x12,107,size_t) /* elevator set */ + +#define BLKGETLASTSECT _IO(0x12,108) /* get last sector of block device */ + +#define BLKBSZGET _IOR(0x12,112,size_t) +#define BLKBSZSET _IOW(0x12,113,size_t) +#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ + +#endif /* BLKROSET */ + +#ifndef HDIO_GETGEO +#define HDIO_GETGEO 0x0301 +struct hd_geometry { + unsigned char heads; + unsigned char sectors; + unsigned short cylinders; /* truncated */ + unsigned long start; +}; +#endif + +/* 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); + + +#endif /* BLKDEV_H */ |