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Man Pages
VCOUNT(9) FreeBSD Kernel Developer's Manual VCOUNT(9)

vcount, count_dev
get total number of references to a device

#include <sys/param.h>
#include <sys/time.h>
#include <sys/conf.h>
#include <sys/vnode.h>
int
vcount(struct vnode *vp);
int
count_dev(struct cdev *dev);

vcount() is used to get the number of references to a particular device. It allows for the fact that multiple vnodes may reference the same device. count_dev() does the same thing as vcount(), but takes a struct cdev rather than a struct vnode pointer as an argument.

vcount() and count_dev() both return the number of references to the device.

VFS(9), vnode(9)

This manual page was written by Andrew Stevenson.
January 19, 2012 FreeBSD 12.0-RELEASE

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