blob: be5d0f4ad24cbc8496ae42a281c82cdf5a162553 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_BLKPG_H
2#define _LINUX_BLKPG_H
3
4/*
5 * Partition table and disk geometry handling
6 *
7 * A single ioctl with lots of subfunctions:
8 *
9 * Device number stuff:
10 * get_whole_disk() (given the device number of a partition,
11 * find the device number of the encompassing disk)
12 * get_all_partitions() (given the device number of a disk, return the
13 * device numbers of all its known partitions)
14 *
15 * Partition stuff:
16 * add_partition()
17 * delete_partition()
18 * test_partition_in_use() (also for test_disk_in_use)
19 *
20 * Geometry stuff:
21 * get_geometry()
22 * set_geometry()
23 * get_bios_drivedata()
24 *
25 * For today, only the partition stuff - aeb, 990515
26 */
27#include <linux/ioctl.h>
28
29#define BLKPG _IO(0x12,105)
30
31/* The argument structure */
32struct blkpg_ioctl_arg {
33 int op;
34 int flags;
35 int datalen;
36 void __user *data;
37};
38
39/* The subfunctions (for the op field) */
40#define BLKPG_ADD_PARTITION 1
41#define BLKPG_DEL_PARTITION 2
42
43/* Sizes of name fields. Unused at present. */
44#define BLKPG_DEVNAMELTH 64
45#define BLKPG_VOLNAMELTH 64
46
47/* The data structure for ADD_PARTITION and DEL_PARTITION */
48struct blkpg_partition {
49 long long start; /* starting offset in bytes */
50 long long length; /* length in bytes */
51 int pno; /* partition number */
52 char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2,
53 to be used in kernel messages */
54 char volname[BLKPG_VOLNAMELTH]; /* volume label */
55};
56
57#endif /* _LINUX_BLKPG_H */