[thirdparty/util-linux.git] / include / partx.h

/*
 * 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 */
Commit	Line	Data
faeb1b64 KZ	1	/*
	2	* No copyright is claimed. This code is in the public domain; do with
	3	* it what you wish.
	4	*/
c4ecaf21 DB	5	#ifndef UTIL_LINUX_PARTX_H
	6	#define UTIL_LINUX_PARTX_H
	7
	8	#include <sys/ioctl.h>
	9	#include <linux/blkpg.h>
e163adb8	10	#include <stdint.h>
c4ecaf21	11
8863a802 KZ	12	#ifndef BLKPG_ADD_PARTITION
	13	# define BLKPG_ADD_PARTITION 1
	14	#endif
	15
	16	#ifndef BLKPG_DEL_PARTITION
	17	# define BLKPG_DEL_PARTITION 2
	18	#endif
	19
	20	#ifndef BLKPG_RESIZE_PARTITION
	21	# define BLKPG_RESIZE_PARTITION 3 /* since Linux 3.6 */
	22	#endif
	23
24b7db7e KZ	24
	25	#define INIT_BLKPG_PARTITION(_partno, _start, _size) { \
	26	.pno = (_partno), \
	27	.start = (_start) << 9, \
	28	.length = (_size) << 9, \
	29	.devname[0] = 0, \
	30	.volname[0] = 0 \
	31	}
	32
	33	#define INIT_BLKPG_ARG(_action, _part) { \
	34	.op = (_action), \
	35	.flags = 0, \
	36	.datalen = sizeof(*(_part)), \
	37	.data = (_part) \
	38	}
	39
	40
659e5f5b	41	static inline int partx_del_partition(int fd, unsigned int partno)
c4ecaf21	42	{
24b7db7e KZ	43	struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, 0, 0);
24b7db7e KZ	44	struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_DEL_PARTITION, &p);
c4ecaf21 DB	45
	46	return ioctl(fd, BLKPG, &a);
	47	}
22853e4a	48
c4ecaf21	49	static inline int partx_add_partition(int fd, int partno,
659e5f5b	50	uint64_t start, uint64_t size)
c4ecaf21	51	{
24b7db7e KZ	52	struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
24b7db7e KZ	53	struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_ADD_PARTITION, &p);
c4ecaf21 DB	54
c4ecaf21 DB	55	return ioctl(fd, BLKPG, &a);
22853e4a	56	}
1d4ad1de	57
8863a802 KZ	58	static inline int partx_resize_partition(int fd, int partno,
	59	uint64_t start, uint64_t size)
	60	{
24b7db7e KZ	61	struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
24b7db7e KZ	62	struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_RESIZE_PARTITION, &p);
8863a802 KZ	63
	64	return ioctl(fd, BLKPG, &a);
	65	}
	66
c4ecaf21	67	#endif /* UTIL_LINUX_PARTX_H */