cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/blkpg.h

#ifndef _UAPI__LINUX_BLKPG_H

#define _UAPI__LINUX_BLKPG_H

/*
 * Partition table and disk geometry handling
 *
 * A single ioctl with lots of subfunctions:
 *
 * Device number stuff:
 *    get_whole_disk()          (given the device number of a partition,
 *                               find the device number of the encompassing disk)
 *    get_all_partitions()      (given the device number of a disk, return the
 *                               device numbers of all its known partitions)
 *
 * Partition stuff:
 *    add_partition()
 *    delete_partition()
 *    test_partition_in_use()   (also for test_disk_in_use)
 *
 * Geometry stuff:
 *    get_geometry()
 *    set_geometry()
 *    get_bios_drivedata()
 *
 * For today, only the partition stuff - aeb, 990515
 */
#include <linux/compiler.h>
#include <linux/ioctl.h>


#define BLKPG      _IO(0x12,105)

/* The argument structure */

struct blkpg_ioctl_arg {
        
int op;
        
int flags;
        
int datalen;
        
void __user *data;
};

/* The subfunctions (for the op field) */

#define BLKPG_ADD_PARTITION	1

#define BLKPG_DEL_PARTITION	2

#define BLKPG_RESIZE_PARTITION	3

/* Sizes of name fields. Unused at present. */

#define BLKPG_DEVNAMELTH	64

#define BLKPG_VOLNAMELTH	64

/* The data structure for ADD_PARTITION and DEL_PARTITION */

struct blkpg_partition {
	
long long start;		/* starting offset in bytes */
	
long long length;		/* length in bytes */
	
int pno;			/* partition number */
	
char devname[BLKPG_DEVNAMELTH];	/* partition name, like sda5 or c0d1p2,
                                           to be used in kernel messages */
	
char volname[BLKPG_VOLNAMELTH];	/* volume label */
};

#endif /* _UAPI__LINUX_BLKPG_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8588.54%120.00%
Vivek Goyal44.17%120.00%
David Woodhouse33.12%120.00%
Brian Norris33.12%120.00%
Al Viro11.04%120.00%
Total96100.00%5100.00%
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