1 #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 */
32 struct blkpg_ioctl_arg {
33 int op;
34 int flags;
35 int datalen;
36 void *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 */
48 struct 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 #ifdef __KERNEL__
58
59 extern char * partition_name(kdev_t dev);
60 extern int blk_ioctl(kdev_t dev, unsigned int cmd, unsigned long arg);
61
62 #endif /* __KERNEL__ */
63
64 #endif /* _LINUX_BLKPG_H */
65
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