vn_isdisk
— checks
if a vnode represents a disk
#include
<sys/param.h>
#include <sys/vnode.h>
bool
vn_isdisk
(struct
vnode *vp);
bool
vn_isdisk_error
(struct
vnode *vp, int
*errp);
The
vn_isdisk
()
and
vn_isdisk_error
()
functions check to see if vp represents a disk. In
order for vp to be a disk, it must be a character
device, v_rdev must be valid, and the
cdevsw entry's flags must have
D_DISK
set.
The arguments are:
- vp
- The vnode to check.
- errp
- An integer pointer to store the error number in if the call fails.
If the vnode represents a disk, true is returned; otherwise, false
is returned and errp will contain the error
number.