Macros
#define	_IO(type, nr) _IOC(_IOC_NONE,(type),(nr),0)

#define	_IOC(dir, type, nr, size)

#define	_IOC_DIRBITS 2

#define	_IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)

#define	_IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)

#define	_IOC_NONE 0U

#define	_IOC_NRBITS 8

#define	_IOC_NRMASK ((1 << _IOC_NRBITS)-1)

#define	_IOC_NRSHIFT 0

#define	_IOC_READ 2U

#define	_IOC_SIZEBITS 14

#define	_IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)

#define	_IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)

#define	_IOC_TYPEBITS 8

#define	_IOC_TYPECHECK(t) (sizeof(t))

#define	_IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)

#define	_IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)

#define	_IOC_WRITE 1U

#define	_IOR(type, nr, size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))

#define	_IOW(type, nr, size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))

#define	_IOWR(type, nr, size) _IOC(_IOC_READ\|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))

#define	BLKGETSIZE64 _IOR(0x12,114,size_t) /* get device size in bytes (u64 arg) /

#define	BLKPBSZGET _IO(0x12,123) /* get block physical device sector size */

#define	BLKSSZGET _IO(0x12,104) /* get block logical device sector size */

Macro Definition Documentation

◆ _IO

#define _IO	(	type,
		nr
	)	_IOC(_IOC_NONE,(type),(nr),0)

Definition at line 92 of file ioctl.h.

◆ _IOC

#define _IOC	(	dir,
		type,
		nr,
		size
	)

Value:

   (((dir)  << _IOC_DIRSHIFT) | \
   ((type) << _IOC_TYPESHIFT) | \
   ((nr)   << _IOC_NRSHIFT) | \
   ((size) << _IOC_SIZESHIFT))

Definition at line 72 of file ioctl.h.

◆ _IOC_DIRBITS

#define _IOC_DIRBITS 2

Definition at line 39 of file ioctl.h.

◆ _IOC_DIRMASK

#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)

Definition at line 45 of file ioctl.h.

◆ _IOC_DIRSHIFT

#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)

Definition at line 50 of file ioctl.h.

◆ _IOC_NONE

#define _IOC_NONE 0U

Definition at line 61 of file ioctl.h.

◆ _IOC_NRBITS

#define _IOC_NRBITS 8

Definition at line 31 of file ioctl.h.

◆ _IOC_NRMASK

#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)

Definition at line 42 of file ioctl.h.

◆ _IOC_NRSHIFT

#define _IOC_NRSHIFT 0

Definition at line 47 of file ioctl.h.

◆ _IOC_READ

#define _IOC_READ 2U

Definition at line 69 of file ioctl.h.

◆ _IOC_SIZEBITS

#define _IOC_SIZEBITS 14

Definition at line 35 of file ioctl.h.

◆ _IOC_SIZEMASK

#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)

Definition at line 44 of file ioctl.h.

◆ _IOC_SIZESHIFT

#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)

Definition at line 49 of file ioctl.h.

◆ _IOC_TYPEBITS

#define _IOC_TYPEBITS 8

Definition at line 32 of file ioctl.h.

◆ _IOC_TYPECHECK

#define _IOC_TYPECHECK ( t ) (sizeof(t))

Definition at line 79 of file ioctl.h.

◆ _IOC_TYPEMASK

#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)

Definition at line 43 of file ioctl.h.

◆ _IOC_TYPESHIFT

#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)

Definition at line 48 of file ioctl.h.

◆ _IOC_WRITE

#define _IOC_WRITE 1U

Definition at line 65 of file ioctl.h.

◆ _IOR

#define _IOR	(	type,
		nr,
		size
	)	_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))

Definition at line 93 of file ioctl.h.

◆ _IOW

#define _IOW	(	type,
		nr,
		size
	)	_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))

Definition at line 94 of file ioctl.h.

◆ _IOWR

#define _IOWR	(	type,
		nr,
		size
	)	_IOC(_IOC_READ\|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))

Definition at line 95 of file ioctl.h.

◆ BLKGETSIZE64

#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* get device size in bytes (u64 *arg) */

Definition at line 100 of file ioctl.h.

◆ BLKPBSZGET

#define BLKPBSZGET _IO(0x12,123) /* get block physical device sector size */

Definition at line 101 of file ioctl.h.

◆ BLKSSZGET

#define BLKSSZGET _IO(0x12,104) /* get block logical device sector size */

Definition at line 99 of file ioctl.h.

Macros