inet/ip/ip.c

1871 	dce_t		*dce;
1895 	dce = dce_lookup_and_add_v4(dst, ipst);
1896 	if (dce == NULL) {
1898 		ip1dbg(("icmp_inbound_too_big_v4: no dce for 0x%x\n",
1908 	mutex_enter(&dce->dce_lock);
1909 	if (dce->dce_flags & DCEF_PMTU)
1910 		old_mtu = dce->dce_pmtu;
1924 		DTRACE_PROBE2(ip4__pmtu__guess, dce_t *, dce,
1933 			ip1dbg(("Wrong mtu: sent %d, dce %d\n",
1958 		dce->dce_flags |= DCEF_TOO_SMALL_PMTU;
1960 		dce->dce_flags &= ~DCEF_TOO_SMALL_PMTU;
1962 	dce->dce_pmtu = MIN(old_mtu, mtu);
1965 	icmph->icmph_du_mtu =  htons((uint16_t)dce->dce_pmtu);
1967 	    dce, int, orig_mtu, int, mtu);
1970 	dce->dce_flags |= DCEF_PMTU;
1971 	dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
1972 	mutex_exit(&dce->dce_lock);
1978 	dce_increment_generation(dce);
1979 	dce_refrele(dce);
3350  * routing lookup but the dce and label checks will be done on dst_addr,
3369 	dce_t		*dce;
3473 		/* Fallback to the default dce if allocation fails */
3474 		dce = dce_lookup_and_add_v4(dst_addr, ipst);
3475 		if (dce != NULL)
3476 			generation = dce->dce_generation;
3478 			dce = dce_lookup_v4(dst_addr, ipst, &generation);
3480 		dce = dce_lookup_v4(dst_addr, ipst, &generation);
3482 	ASSERT(dce != NULL);
3486 	dce_refhold_notr(dce);
3487 	dce_refrele(dce);
3489 	ixa->ixa_dce = dce;
3635 		if (dce->dce_flags & DCEF_UINFO)
3636 			*uinfo = dce->dce_uinfo;
3700  * Assumes that ixa_ire, dce, and nce have already been set up.
3707  * is no longer required since the dce is per final destination.
3713 	dce_t		*dce;
3719 	dce = ixa->ixa_dce;
3743 	if ((dce->dce_flags & DCEF_PMTU) &&
3744 	    TICK_TO_SEC(ddi_get_lbolt64()) - dce->dce_last_change_time >
3749 		mutex_enter(&dce->dce_lock);
3750 		dce->dce_flags &= ~(DCEF_PMTU|DCEF_TOO_SMALL_PMTU);
3751 		dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
3752 		mutex_exit(&dce->dce_lock);
3753 		dce_increment_generation(dce);
3767 		if (dce->dce_flags & DCEF_PMTU) {
3768 			if (dce->dce_pmtu < pmtu)
3769 				pmtu = dce->dce_pmtu;
3771 			if (dce->dce_flags & DCEF_TOO_SMALL_PMTU) {
3872 		if ((dce->dce_flags & DCEF_TOO_SMALL_PMTU) ||
8511 			 * The dce and fragmentation code can cope with