Provided by: freebsd-manpages_12.2-1_all 

NAME
vn_isdisk — checks if a vnode represents a disk
SYNOPSIS
#include <sys/param.h>
#include <sys/vnode.h>
int
vn_isdisk(struct vnode *vp, int *errp);
DESCRIPTION
The vn_isdisk() function checks 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.
Its arguments are:
vp The vnode to check.
errp An integer pointer to store the error number in if the call fails.
RETURN VALUES
If the vnode represents a disk, 1 is returned; otherwise, 0 is returned and errp will contain the error
number.
AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>.
Debian July 9, 2001 VN_ISDISK(9)