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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*/
#ifndef UTIL_LINUX_PARTX_H
#define UTIL_LINUX_PARTX_H
#include <sys/ioctl.h>
#include <linux/blkpg.h>
#include <stdint.h>
#ifndef BLKPG_ADD_PARTITION
# define BLKPG_ADD_PARTITION 1
#endif
#ifndef BLKPG_DEL_PARTITION
# define BLKPG_DEL_PARTITION 2
#endif
#ifndef BLKPG_RESIZE_PARTITION
# define BLKPG_RESIZE_PARTITION 3 /* since Linux 3.6 */
#endif
#define INIT_BLKPG_PARTITION(_partno, _start, _size) { \
.pno = (_partno), \
.start = (_start) << 9, \
.length = (_size) << 9, \
.devname[0] = 0, \
.volname[0] = 0 \
}
#define INIT_BLKPG_ARG(_action, _part) { \
.op = (_action), \
.flags = 0, \
.datalen = sizeof(*(_part)), \
.data = (_part) \
}
static inline int partx_del_partition(int fd, unsigned int partno)
{
struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, 0, 0);
struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_DEL_PARTITION, &p);
return ioctl(fd, BLKPG, &a);
}
static inline int partx_add_partition(int fd, int partno,
uint64_t start, uint64_t size)
{
struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_ADD_PARTITION, &p);
return ioctl(fd, BLKPG, &a);
}
static inline int partx_resize_partition(int fd, int partno,
uint64_t start, uint64_t size)
{
struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_RESIZE_PARTITION, &p);
return ioctl(fd, BLKPG, &a);
}
#endif /* UTIL_LINUX_PARTX_H */
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