1 #ifndef _UAPI__LINUX_BLKPG_H
2 #define _UAPI__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/compiler.h>
28 #include <linux/ioctl.h>
29 
30 #define BLKPG      _IO(0x12,105)
31 
32 /* The argument structure */
33 struct blkpg_ioctl_arg {
34         int op;
35         int flags;
36         int datalen;
37         void __user *data;
38 };
39 
40 /* The subfunctions (for the op field) */
41 #define BLKPG_ADD_PARTITION	1
42 #define BLKPG_DEL_PARTITION	2
43 #define BLKPG_RESIZE_PARTITION	3
44 
45 /* Sizes of name fields. Unused at present. */
46 #define BLKPG_DEVNAMELTH	64
47 #define BLKPG_VOLNAMELTH	64
48 
49 /* The data structure for ADD_PARTITION and DEL_PARTITION */
50 struct blkpg_partition {
51 	long long start;		/* starting offset in bytes */
52 	long long length;		/* length in bytes */
53 	int pno;			/* partition number */
54 	char devname[BLKPG_DEVNAMELTH];	/* partition name, like sda5 or c0d1p2,
55 					   to be used in kernel messages */
56 	char volname[BLKPG_VOLNAMELTH];	/* volume label */
57 };
58 
59 #endif /* _UAPI__LINUX_BLKPG_H */
60