8863a802eb
This is a simple wrapper for BLKPG_RESIZE_PARTITION (since kernel 3.6). Co-Author: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Karel Zak <kzak@redhat.com>
75 lines
1.4 KiB
C
75 lines
1.4 KiB
C
#ifndef UTIL_LINUX_PARTX_H
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#define UTIL_LINUX_PARTX_H
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#include <sys/ioctl.h>
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#include <linux/blkpg.h>
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#ifndef BLKPG_ADD_PARTITION
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# define BLKPG_ADD_PARTITION 1
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#endif
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#ifndef BLKPG_DEL_PARTITION
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# define BLKPG_DEL_PARTITION 2
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#endif
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#ifndef BLKPG_RESIZE_PARTITION
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# define BLKPG_RESIZE_PARTITION 3 /* since Linux 3.6 */
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#endif
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static inline int partx_del_partition(int fd, unsigned int partno)
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{
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struct blkpg_ioctl_arg a;
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struct blkpg_partition p;
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p.pno = partno;
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p.start = 0;
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p.length = 0;
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p.devname[0] = 0;
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p.volname[0] = 0;
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a.op = BLKPG_DEL_PARTITION;
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a.flags = 0;
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a.datalen = sizeof(p);
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a.data = &p;
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return ioctl(fd, BLKPG, &a);
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}
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static inline int partx_add_partition(int fd, int partno,
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uint64_t start, uint64_t size)
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{
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struct blkpg_ioctl_arg a;
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struct blkpg_partition p;
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p.pno = partno;
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p.start = start << 9;
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p.length = size << 9;
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p.devname[0] = 0;
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p.volname[0] = 0;
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a.op = BLKPG_ADD_PARTITION;
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a.flags = 0;
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a.datalen = sizeof(p);
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a.data = &p;
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return ioctl(fd, BLKPG, &a);
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}
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static inline int partx_resize_partition(int fd, int partno,
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uint64_t start, uint64_t size)
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{
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struct blkpg_ioctl_arg a;
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struct blkpg_partition p;
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p.pno = partno;
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p.start = start << 9;
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p.length = size << 9;
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p.devname[0] = 0;
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p.volname[0] = 0;
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a.op = BLKPG_RESIZE_PARTITION;
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a.flags = 0;
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a.datalen = sizeof(p);
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a.data = &p;
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return ioctl(fd, BLKPG, &a);
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}
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#endif /* UTIL_LINUX_PARTX_H */
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