Function iflib_clone_create

freebsd/net/iflib_clone.c:169–219

}

static int
iflib_clone_create(struct if_clone *ifc, int unit, caddr_t params)
{
	const char *name = ifc_name(ifc);
	struct iflib_cloneattach_ctx clctx;
	if_ctx_t ctx;
	if_pseudo_t ip;
	device_t dev;
	int rc;

	clctx.cc_ifc = ifc;
	clctx.cc_len = 0;
	clctx.cc_params = params;
	clctx.cc_name = name;

	if (__predict_false(iflib_pseudodev == NULL)) {
		/* SYSINIT initialization would panic !?! */
		mtx_lock(&Giant);
		iflib_pseudodev = device_add_child(root_bus, "ifpseudo", 0);
		mtx_unlock(&Giant);
		MPASS(iflib_pseudodev != NULL);
	}
	ip = iflib_ip_lookup(name);
	if (ip == NULL) {
		printf("no ip found for %s\n", name);
		return (ENOENT);
	}
	if ((dev = devclass_get_device(ip->ip_dc, unit)) != NULL) {
		printf("unit %d allocated\n", unit);
		bus_generic_print_child(iflib_pseudodev, dev);
		return (EBUSY);
	}
	PSEUDO_LOCK();
	dev = device_add_child(iflib_pseudodev, name, unit);
	device_set_driver(dev, &iflib_pseudodriver);
	PSEUDO_UNLOCK();
	device_quiet(dev);
	rc = device_attach(dev);
	MPASS(rc == 0);
	MPASS(dev != NULL);
	MPASS(devclass_get_device(ip->ip_dc, unit) == dev);
	rc = iflib_pseudo_register(dev, ip->ip_sctx, &ctx, &clctx);
	if (rc) {
		mtx_lock(&Giant);
		device_delete_child(iflib_pseudodev, dev);
		mtx_unlock(&Giant);
	} else
		device_set_softc(dev, ctx);

	return (rc);
}

static void
iflib_clone_destroy(if_t ifp)