getdevvp(9)

NAME

getdevvp, bdevvp, cdevvp — create a vnode for a device

SYNOPSIS

#include <sys/param.h>
#include <sys/vnode.h>

int
getdevvp(dev_t dev, struct vnode **vpp, enum vtype type);

int
bdevvp(dev_t dev, struct vnode **vpp);

int
cdevvp(dev_t dev, struct vnode **vpp);

DESCRIPTION

The getdevvp() function creates a vnode for a device of type type with a device number of dev, and returns a pointer to it in vpp.

Its arguments are:

dev

The device number of the desired device.

vpp

Where the vnode will be returned on success.

type

The type of device, either:

VBLK

For a block device, or

VCHR

for a character device.

bdevvp() and cdevvp() use getdevvp internally, specifying the third argument. bdevvp() will create a vnode for a block device, and is used for the root file system and swap areas, among other things. cdevvp() will create a vnode for a character device and is used in console handling.

RETURN VALUES

All functions return 0 on success. If an error occurs, vpp will point to NULL. See getnewvnode(9) for further return values.

SEE ALSO

getnewvnode(9), vnode(9)