NAME    [Toc]    [Back]

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

SYNOPSIS    [Toc]    [Back]

     #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    [Toc]    [Back]

     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  kernfs
and in some
     console handling.

RETURN VALUES    [Toc]    [Back]

     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    [Toc]    [Back]

     getnewvnode(9), vnode(9)

OpenBSD     3.6                        February     18,      2002