Function if_detach

freebsd/net/if.c:1118–1131

* Detach an interface, removing it from the list of "active" interfaces. * If vmove flag is set on entry to if_detach_internal(), perform only a * limited subset of cleanup tasks, given that we are moving an ifnet from * one vnet to another, where it must be fully operational. * * XXXRW: There are some significant questions about event ordering, and * how to prevent things from starting to u

 * how to prevent things from starting to use the interface during detach.
 */
void
if_detach(struct ifnet *ifp)
{
	bool found;

	CURVNET_SET_QUIET(ifp->if_vnet);
	found = if_unlink_ifnet(ifp, false);
	if (found) {
		sx_xlock(&ifnet_detach_sxlock);
		if_detach_internal(ifp, 0, NULL);
		sx_xunlock(&ifnet_detach_sxlock);
	}
	CURVNET_RESTORE();
}

/*
 * The vmove flag, if set, indicates that we are called from a callpath