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 */ 32struct 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 */ 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#ifdef __KERNEL__ 58 59extern char * partition_name(kdev_t dev); 60extern int blk_ioctl(kdev_t dev, unsigned int cmd, unsigned long arg); 61 62#endif /* __KERNEL__ */ 63 64#endif /* _LINUX_BLKPG_H */ 65