Module opcode
Const functions for computing opcode values.
Linux's headers define macros such as _IO, _IOR, _IOW, and _IOWR
for defining ioctl values in a structured way that encode whether they
are reading and/or writing, and other information about the ioctl. The
functions in this module correspond to those macros.
If you're writing a driver and defining your own ioctl numbers, it's recommended to use these functions to compute them.
Functions
- from_components Create a new opcode from a direction, group, number, and size.
- none Create a new opcode from a group, a number, that uses no data.
- read Create a new reading opcode from a group, a number and the type of data.
- read_write Create a new reading and writing opcode from a group, a number and the type of data.
- write Create a new writing opcode from a group, a number and the type of data.