bsd/net/route.c

1674 		struct rtentry *gwrt = NULL;
1726 		if ((gwrt = rt->rt_gwroute) != NULL)
1768 		 * lock being acquired if gwrt is a clone of rt.
1770 		if (gwrt != NULL)
1771 			rtfree_locked(gwrt);
2305 		struct rtentry *gwrt;
2321 		gwrt = rtalloc1_scoped_locked(gate, 1, RTF_PRCLONING, ifscope);
2322 		if (gwrt != NULL)
2323 			RT_LOCK_ASSERT_NOTHELD(gwrt);
2340 		if (gwrt == rt) {
2341 			RT_REMREF_LOCKED(gwrt);
2349 		 * we're holding rnh_lock now, so rt_gateway and rt_ifp of gwrt
2353 		    gwrt != NULL && gwrt->rt_ifp != NULL &&
2354 		    gwrt->rt_ifp->if_index != ifscope) {
2355 			rtfree_locked(gwrt);	/* rt != gwrt, no deadlock */
2364 			if (gwrt != NULL)
2365 				rtfree_locked(gwrt);
2371 		/* Set gateway route; callee adds ref to gwrt if non-NULL */
2372 		rt_set_gwroute(rt, dst, gwrt);
2394 		    gwrt != NULL && gwrt->rt_gateway->sa_family == AF_LINK &&
2395 		    (gwrt->rt_ifp->if_index == get_primary_ifscope(AF_INET) ||
2397 			kdp_set_gateway_mac(SDL((void *)gwrt->rt_gateway)->
2402 		if (gwrt != NULL)
2403 			RT_REMREF(gwrt);
2444 	 * For consistency between rt_gateway and rt_key(gwrt).
2482 rt_set_gwroute(struct rtentry *rt, struct sockaddr *dst, struct rtentry *gwrt)
2489 	if (gwrt != NULL)
2490 		RT_ADDREF(gwrt);	/* for this routine */
2494 	 * set to gwrt, this is slightly redundant (though safe since
2511 	if ((rt->rt_gwroute = gwrt) != NULL) {
2512 		RT_ADDREF(gwrt);	/* for rt */
2523 		/* If gwrt points to a default router, mark it accordingly */
2524 		if (gwrt_isrouter && RT_HOST(gwrt) &&
2525 		    !(gwrt->rt_flags & RTF_ROUTER)) {
2526 			RT_LOCK(gwrt);
2527 			gwrt->rt_flags |= RTF_ROUTER;
2528 			RT_UNLOCK(gwrt);
2531 		RT_REMREF(gwrt);	/* for this routine */
3379 		struct rtentry *gwrt = rt->rt_gwroute;
3387 		if (gwrt == NULL) {
3397 		 * Take gwrt's lock while holding route's lock;
3398 		 * this is okay since gwrt never points back
3401 		RT_LOCK_SPIN(gwrt);
3402 		if (!(gwrt->rt_flags & RTF_UP)) {
3404 			RT_UNLOCK(gwrt);
3408 			rtfree(gwrt);
3411 			gwrt = rtalloc1_scoped_locked(gw, 1, 0, ifindex);
3419 			if (!(rt->rt_flags & RTF_UP) || gwrt == NULL ||
3420 			    gwrt == rt || !equal(gw, rt->rt_gateway)) {
3421 				if (gwrt == rt) {
3422 					RT_REMREF_LOCKED(gwrt);
3423 					gwrt = NULL;
3429 				if (gwrt != NULL)
3430 					rtfree_locked(gwrt);
3434 			VERIFY(gwrt != NULL);
3436 			 * Set gateway route; callee adds ref to gwrt;
3437 			 * gwrt has an extra ref from rtalloc1() for
3440 			rt_set_gwroute(rt, rt_key(rt), gwrt);
3445 			rt = gwrt;
3447 			RT_ADDREF_LOCKED(gwrt);
3448 			RT_UNLOCK(gwrt);
3452 			rt = gwrt;
3454 		VERIFY(rt == gwrt && rt != hint);
3460 		 * a reference to it.  rt == gwrt.
3484 		/* rt == gwrt; if it is now down, give up */
3510 	/* Clean up route (either it is "rt" or "gwrt") */
3526 rt_revalidate_gwroute(struct rtentry *rt, struct rtentry *gwrt)
3529 	VERIFY(gwrt != NULL);
3533 	    rt->rt_ifp == gwrt->rt_ifp && rt->rt_gateway->sa_family ==
3534 	    rt_key(gwrt)->sa_family && (rt->rt_gwroute == NULL ||
3545 			(void) sa_copy(rt_key(gwrt), &key_ss, NULL);
3550 			isequal = equal(rt_key(gwrt), rt->rt_gateway);
3553 		/* If they are the same, update gwrt */
3558 			rt_set_gwroute(rt, rt_key(rt), gwrt);