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Command: getdevvp | Section: 9 | Source: OpenBSD | File: getdevvp.9
GETDEVVP(9) FreeBSD Kernel Developer's Manual 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
a NULLVP. See getnewvnode(9) for further return values.
SEE ALSO
getnewvnode(9), vnode(9)
FreeBSD 14.1-RELEASE-p8 November 14, 2020 FreeBSD 14.1-RELEASE-p8