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/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 44 /* Sizes of name fields. Unused at present. */ 45 #define BLKPG_DEVNAMELTH 64 46 #define BLKPG_VOLNAMELTH 64 47 48 /* The data structure for ADD_PARTITION and DEL_PARTITION */ 49 struct blkpg_partition { 50 long long start; /* starting offset in bytes */ 51 long long length; /* length in bytes */ 52 int pno; /* partition number */ 53 char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2, 54 to be used in kernel messages */ 55 char volname[BLKPG_VOLNAMELTH]; /* volume label */ 56 }; 57 58 #endif /* _LINUX_BLKPG_H */ 59