COUNT_DEV(9FREEBSD) - man page online | system kernel interfaces

Get total number of references to a device.

January 19, 2012
VCOUNT(9)                         BSD Kernel Developer's Manual                         VCOUNT(9)

NAME vcount, count_dev — get total number of references to a device
SYNOPSIS #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);
DESCRIPTION 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.
RETURN VALUES vcount() and count_dev() both return the number of references to the device.
SEE ALSO VFS(9), vnode(9)
AUTHORS This manual page was written by Andrew Stevenson.
BSD January 19, 2012 BSD
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count_dev(9freebsd) referred by
refer to vcount(9freebsd) | VFS(9freebsd) | vnode(9freebsd)