in6_rmx.c revision 185751
1139826Simp/*- 253541Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 353541Sshin * All rights reserved. 453541Sshin * 553541Sshin * Redistribution and use in source and binary forms, with or without 653541Sshin * modification, are permitted provided that the following conditions 753541Sshin * are met: 853541Sshin * 1. Redistributions of source code must retain the above copyright 953541Sshin * notice, this list of conditions and the following disclaimer. 1053541Sshin * 2. Redistributions in binary form must reproduce the above copyright 1153541Sshin * notice, this list of conditions and the following disclaimer in the 1253541Sshin * documentation and/or other materials provided with the distribution. 1353541Sshin * 3. Neither the name of the project nor the names of its contributors 1453541Sshin * may be used to endorse or promote products derived from this software 1553541Sshin * without specific prior written permission. 1653541Sshin * 1753541Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1853541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1953541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2053541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2153541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2253541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2353541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2453541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2553541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2653541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2753541Sshin * SUCH DAMAGE. 28174510Sobrien * 29174510Sobrien * $KAME: in6_rmx.c,v 1.11 2001/07/26 06:53:16 jinmei Exp $ 3053541Sshin */ 3153541Sshin 32139826Simp/*- 3353541Sshin * Copyright 1994, 1995 Massachusetts Institute of Technology 3453541Sshin * 3553541Sshin * Permission to use, copy, modify, and distribute this software and 3653541Sshin * its documentation for any purpose and without fee is hereby 3753541Sshin * granted, provided that both the above copyright notice and this 3853541Sshin * permission notice appear in all copies, that both the above 3953541Sshin * copyright notice and this permission notice appear in all 4053541Sshin * supporting documentation, and that the name of M.I.T. not be used 4153541Sshin * in advertising or publicity pertaining to distribution of the 4253541Sshin * software without specific, written prior permission. M.I.T. makes 4353541Sshin * no representations about the suitability of this software for any 4453541Sshin * purpose. It is provided "as is" without express or implied 4553541Sshin * warranty. 4653541Sshin * 4753541Sshin * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 4853541Sshin * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 4953541Sshin * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 5053541Sshin * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 5153541Sshin * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5253541Sshin * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5353541Sshin * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5453541Sshin * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5553541Sshin * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5653541Sshin * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 5753541Sshin * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5853541Sshin * SUCH DAMAGE. 5953541Sshin * 6053541Sshin */ 6153541Sshin 6253541Sshin/* 6353541Sshin * This code does two things necessary for the enhanced TCP metrics to 6453541Sshin * function in a useful manner: 6553541Sshin * 1) It marks all non-host routes as `cloning', thus ensuring that 6653541Sshin * every actual reference to such a route actually gets turned 6753541Sshin * into a reference to a host route to the specific destination 6853541Sshin * requested. 6953541Sshin * 2) When such routes lose all their references, it arranges for them 7053541Sshin * to be deleted in some random collection of circumstances, so that 7153541Sshin * a large quantity of stale routing data is not kept in kernel memory 7253541Sshin * indefinitely. See in6_rtqtimo() below for the exact mechanism. 7353541Sshin */ 7453541Sshin 75174510Sobrien#include <sys/cdefs.h> 76174510Sobrien__FBSDID("$FreeBSD: head/sys/netinet6/in6_rmx.c 185751 2008-12-08 00:28:21Z imp $"); 77174510Sobrien 7853541Sshin#include <sys/param.h> 7953541Sshin#include <sys/systm.h> 8053541Sshin#include <sys/kernel.h> 81185751Simp#include <sys/lock.h> 8253541Sshin#include <sys/sysctl.h> 8353541Sshin#include <sys/queue.h> 8453541Sshin#include <sys/socket.h> 8553541Sshin#include <sys/socketvar.h> 8653541Sshin#include <sys/mbuf.h> 87185747Skmacy#include <sys/rwlock.h> 8853541Sshin#include <sys/syslog.h> 89120727Ssam#include <sys/callout.h> 90181803Sbz#include <sys/vimage.h> 9153541Sshin 9253541Sshin#include <net/if.h> 9353541Sshin#include <net/route.h> 94185571Sbz#include <net/vnet.h> 95185571Sbz 9653541Sshin#include <netinet/in.h> 9753541Sshin#include <netinet/ip_var.h> 9853541Sshin#include <netinet/in_var.h> 9953541Sshin 10062587Sitojun#include <netinet/ip6.h> 10153541Sshin#include <netinet6/ip6_var.h> 10253541Sshin 10362587Sitojun#include <netinet/icmp6.h> 104121283Sume#include <netinet6/nd6.h> 105185571Sbz#include <netinet6/vinet6.h> 10653541Sshin 10753541Sshin#include <netinet/tcp.h> 10853541Sshin#include <netinet/tcp_seq.h> 10953541Sshin#include <netinet/tcp_timer.h> 11053541Sshin#include <netinet/tcp_var.h> 11153541Sshin 112175162Sobrienextern int in6_inithead(void **head, int off); 11353541Sshin 11462587Sitojun#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */ 11553541Sshin 11653541Sshin/* 11753541Sshin * Do what we need to do when inserting a route. 11853541Sshin */ 11953541Sshinstatic struct radix_node * 12053541Sshinin6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, 121171260Sdelphij struct radix_node *treenodes) 12253541Sshin{ 12353541Sshin struct rtentry *rt = (struct rtentry *)treenodes; 12453541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt); 12553541Sshin struct radix_node *ret; 12653541Sshin 12753541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 12853541Sshin rt->rt_flags |= RTF_MULTICAST; 12953541Sshin 13053541Sshin /* 13153541Sshin * A little bit of help for both IPv6 output and input: 13253541Sshin * For local addresses, we make sure that RTF_LOCAL is set, 13353541Sshin * with the thought that this might one day be used to speed up 13453541Sshin * ip_input(). 13553541Sshin * 13653541Sshin * We also mark routes to multicast addresses as such, because 13753541Sshin * it's easy to do and might be useful (but this is much more 13853541Sshin * dubious since it's so easy to inspect the address). (This 13953541Sshin * is done above.) 14053541Sshin * 14153541Sshin * XXX 14253541Sshin * should elaborate the code. 14353541Sshin */ 14453541Sshin if (rt->rt_flags & RTF_HOST) { 14553541Sshin if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr) 14653541Sshin ->sin6_addr, 14753541Sshin &sin6->sin6_addr)) { 14853541Sshin rt->rt_flags |= RTF_LOCAL; 14953541Sshin } 15053541Sshin } 15153541Sshin 152122922Sandre if (!rt->rt_rmx.rmx_mtu && rt->rt_ifp) 153121283Sume rt->rt_rmx.rmx_mtu = IN6_LINKMTU(rt->rt_ifp); 15453541Sshin 15553541Sshin ret = rn_addroute(v_arg, n_arg, head, treenodes); 15653541Sshin if (ret == NULL && rt->rt_flags & RTF_HOST) { 15753541Sshin struct rtentry *rt2; 15853541Sshin /* 15953541Sshin * We are trying to add a host route, but can't. 16053541Sshin * Find out if it is because of an 16153541Sshin * ARP entry and delete it if so. 16253541Sshin */ 163122921Sandre rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING); 16453541Sshin if (rt2) { 16553541Sshin if (rt2->rt_flags & RTF_LLINFO && 16653541Sshin rt2->rt_flags & RTF_HOST && 16753541Sshin rt2->rt_gateway && 16853541Sshin rt2->rt_gateway->sa_family == AF_LINK) { 169121770Ssam rtexpunge(rt2); 170121770Ssam RTFREE_LOCKED(rt2); 17153541Sshin ret = rn_addroute(v_arg, n_arg, head, 17253541Sshin treenodes); 173121770Ssam } else 174121770Ssam RTFREE_LOCKED(rt2); 17553541Sshin } 17653541Sshin } else if (ret == NULL && rt->rt_flags & RTF_CLONING) { 17753541Sshin struct rtentry *rt2; 17853541Sshin /* 17953541Sshin * We are trying to add a net route, but can't. 18053541Sshin * The following case should be allowed, so we'll make a 18153541Sshin * special check for this: 18253541Sshin * Two IPv6 addresses with the same prefix is assigned 18353541Sshin * to a single interrface. 18453541Sshin * # ifconfig if0 inet6 3ffe:0501::1 prefix 64 alias (*1) 18553541Sshin * # ifconfig if0 inet6 3ffe:0501::2 prefix 64 alias (*2) 18653541Sshin * In this case, (*1) and (*2) want to add the same 18753541Sshin * net route entry, 3ffe:0501:: -> if0. 18853541Sshin * This case should not raise an error. 18953541Sshin */ 190122921Sandre rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING); 19153541Sshin if (rt2) { 19253541Sshin if ((rt2->rt_flags & (RTF_CLONING|RTF_HOST|RTF_GATEWAY)) 19353541Sshin == RTF_CLONING 19453541Sshin && rt2->rt_gateway 19553541Sshin && rt2->rt_gateway->sa_family == AF_LINK 19653541Sshin && rt2->rt_ifp == rt->rt_ifp) { 19753541Sshin ret = rt2->rt_nodes; 19853541Sshin } 199120727Ssam RTFREE_LOCKED(rt2); 20053541Sshin } 20153541Sshin } 20253541Sshin return ret; 20353541Sshin} 20453541Sshin 20553541Sshin/* 20653541Sshin * This code is the inverse of in6_clsroute: on first reference, if we 20753541Sshin * were managing the route, stop doing so and set the expiration timer 20853541Sshin * back off again. 20953541Sshin */ 21053541Sshinstatic struct radix_node * 21153541Sshinin6_matroute(void *v_arg, struct radix_node_head *head) 21253541Sshin{ 21353541Sshin struct radix_node *rn = rn_match(v_arg, head); 21453541Sshin struct rtentry *rt = (struct rtentry *)rn; 21553541Sshin 21653541Sshin if (rt && rt->rt_refcnt == 0) { /* this is first reference */ 21753541Sshin if (rt->rt_flags & RTPRF_OURS) { 21853541Sshin rt->rt_flags &= ~RTPRF_OURS; 21953541Sshin rt->rt_rmx.rmx_expire = 0; 22053541Sshin } 22153541Sshin } 22253541Sshin return rn; 22353541Sshin} 22453541Sshin 22562604SitojunSYSCTL_DECL(_net_inet6_ip6); 22662604Sitojun 227185088Szec#ifdef VIMAGE_GLOBALS 228185088Szecstatic int rtq_reallyold6; 229185088Szecstatic int rtq_minreallyold6; 230185088Szecstatic int rtq_toomany6; 231185088Szec#endif 232185088Szec 233185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTEXPIRE, 234185348Szec rtexpire, CTLFLAG_RW, rtq_reallyold6 , 0, ""); 235120913Sume 236185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTMINEXPIRE, 237185348Szec rtminexpire, CTLFLAG_RW, rtq_minreallyold6 , 0, ""); 238120913Sume 239185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTMAXCACHE, 240185348Szec rtmaxcache, CTLFLAG_RW, rtq_toomany6 , 0, ""); 24153541Sshin 242120913Sume 24353541Sshin/* 24453541Sshin * On last reference drop, mark the route as belong to us so that it can be 24553541Sshin * timed out. 24653541Sshin */ 24753541Sshinstatic void 24853541Sshinin6_clsroute(struct radix_node *rn, struct radix_node_head *head) 24953541Sshin{ 250183550Szec INIT_VNET_INET6(curvnet); 25153541Sshin struct rtentry *rt = (struct rtentry *)rn; 25253541Sshin 253120727Ssam RT_LOCK_ASSERT(rt); 254120727Ssam 25553541Sshin if (!(rt->rt_flags & RTF_UP)) 25653541Sshin return; /* prophylactic measures */ 25753541Sshin 25853541Sshin if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST) 25953541Sshin return; 26053541Sshin 261108250Shsu if ((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS)) != RTF_WASCLONED) 26253541Sshin return; 26353541Sshin 26453541Sshin /* 26553541Sshin * As requested by David Greenman: 266181832Sbz * If rtq_reallyold6 is 0, just delete the route without 26753541Sshin * waiting for a timeout cycle to kill it. 26853541Sshin */ 269181832Sbz if (V_rtq_reallyold6 != 0) { 27053541Sshin rt->rt_flags |= RTPRF_OURS; 271181832Sbz rt->rt_rmx.rmx_expire = time_uptime + V_rtq_reallyold6; 27253541Sshin } else { 273121770Ssam rtexpunge(rt); 27453541Sshin } 27553541Sshin} 27653541Sshin 27753541Sshinstruct rtqk_arg { 27853541Sshin struct radix_node_head *rnh; 27953541Sshin int mode; 28053541Sshin int updating; 28153541Sshin int draining; 28253541Sshin int killed; 28353541Sshin int found; 28453541Sshin time_t nextstop; 28553541Sshin}; 28653541Sshin 28753541Sshin/* 28853541Sshin * Get rid of old routes. When draining, this deletes everything, even when 28953541Sshin * the timeout is not expired yet. When updating, this makes sure that 290181832Sbz * nothing has a timeout longer than the current value of rtq_reallyold6. 29153541Sshin */ 29253541Sshinstatic int 29353541Sshinin6_rtqkill(struct radix_node *rn, void *rock) 29453541Sshin{ 295183550Szec INIT_VNET_INET6(curvnet); 29653541Sshin struct rtqk_arg *ap = rock; 29753541Sshin struct rtentry *rt = (struct rtentry *)rn; 29853541Sshin int err; 29953541Sshin 30053541Sshin if (rt->rt_flags & RTPRF_OURS) { 30153541Sshin ap->found++; 30253541Sshin 303150351Sandre if (ap->draining || rt->rt_rmx.rmx_expire <= time_uptime) { 30453541Sshin if (rt->rt_refcnt > 0) 30553541Sshin panic("rtqkill route really not free"); 30653541Sshin 30753541Sshin err = rtrequest(RTM_DELETE, 30853541Sshin (struct sockaddr *)rt_key(rt), 30953541Sshin rt->rt_gateway, rt_mask(rt), 31053541Sshin rt->rt_flags, 0); 31153541Sshin if (err) { 31253541Sshin log(LOG_WARNING, "in6_rtqkill: error %d", err); 31353541Sshin } else { 31453541Sshin ap->killed++; 31553541Sshin } 31653541Sshin } else { 31753541Sshin if (ap->updating 318150351Sandre && (rt->rt_rmx.rmx_expire - time_uptime 319181832Sbz > V_rtq_reallyold6)) { 320150351Sandre rt->rt_rmx.rmx_expire = time_uptime 321181832Sbz + V_rtq_reallyold6; 32253541Sshin } 32353541Sshin ap->nextstop = lmin(ap->nextstop, 32453541Sshin rt->rt_rmx.rmx_expire); 32553541Sshin } 32653541Sshin } 32753541Sshin 32853541Sshin return 0; 32953541Sshin} 33053541Sshin 33153541Sshin#define RTQ_TIMEOUT 60*10 /* run no less than once every ten minutes */ 332185088Szec#ifdef VIMAGE_GLOBALS 333185088Szecstatic int rtq_timeout6; 334180088Skanstatic struct callout rtq_timer6; 335185088Szec#endif 33653541Sshin 33753541Sshinstatic void 33853541Sshinin6_rtqtimo(void *rock) 33953541Sshin{ 340183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 341183550Szec INIT_VNET_NET((struct vnet *) rock); 342183550Szec INIT_VNET_INET6((struct vnet *) rock); 34353541Sshin struct radix_node_head *rnh = rock; 34453541Sshin struct rtqk_arg arg; 34553541Sshin struct timeval atv; 34653541Sshin static time_t last_adjusted_timeout = 0; 34753541Sshin 34853541Sshin arg.found = arg.killed = 0; 34953541Sshin arg.rnh = rnh; 350181803Sbz arg.nextstop = time_uptime + V_rtq_timeout6; 35153541Sshin arg.draining = arg.updating = 0; 352108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 35353541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 354108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 35553541Sshin 35653541Sshin /* 35753541Sshin * Attempt to be somewhat dynamic about this: 35853541Sshin * If there are ``too many'' routes sitting around taking up space, 35953541Sshin * then crank down the timeout, and see if we can't make some more 36053541Sshin * go away. However, we make sure that we will never adjust more 361180084Sjulian * than once in rtq_timeout6 seconds, to keep from cranking down too 36253541Sshin * hard. 36353541Sshin */ 364181832Sbz if ((arg.found - arg.killed > V_rtq_toomany6) 365181803Sbz && (time_uptime - last_adjusted_timeout >= V_rtq_timeout6) 366181832Sbz && V_rtq_reallyold6 > V_rtq_minreallyold6) { 367181832Sbz V_rtq_reallyold6 = 2*V_rtq_reallyold6 / 3; 368181832Sbz if (V_rtq_reallyold6 < V_rtq_minreallyold6) { 369181832Sbz V_rtq_reallyold6 = V_rtq_minreallyold6; 37053541Sshin } 37153541Sshin 372160123Soleg last_adjusted_timeout = time_uptime; 37353541Sshin#ifdef DIAGNOSTIC 374181832Sbz log(LOG_DEBUG, "in6_rtqtimo: adjusted rtq_reallyold6 to %d", 375181832Sbz V_rtq_reallyold6); 37653541Sshin#endif 37753541Sshin arg.found = arg.killed = 0; 37853541Sshin arg.updating = 1; 379108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 38053541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 381108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 38253541Sshin } 38353541Sshin 38453541Sshin atv.tv_usec = 0; 385160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 386181803Sbz callout_reset(&V_rtq_timer6, tvtohz(&atv), in6_rtqtimo, rock); 387183550Szec CURVNET_RESTORE(); 38853541Sshin} 38953541Sshin 39053541Sshin/* 39153541Sshin * Age old PMTUs. 39253541Sshin */ 39353541Sshinstruct mtuex_arg { 39453541Sshin struct radix_node_head *rnh; 39553541Sshin time_t nextstop; 39653541Sshin}; 397185088Szec#ifdef VIMAGE_GLOBALS 398120727Ssamstatic struct callout rtq_mtutimer; 399185088Szec#endif 40053541Sshin 40153541Sshinstatic int 40253541Sshinin6_mtuexpire(struct radix_node *rn, void *rock) 40353541Sshin{ 40453541Sshin struct rtentry *rt = (struct rtentry *)rn; 40553541Sshin struct mtuex_arg *ap = rock; 40653541Sshin 40753541Sshin /* sanity */ 40853541Sshin if (!rt) 40953541Sshin panic("rt == NULL in in6_mtuexpire"); 41053541Sshin 41153541Sshin if (rt->rt_rmx.rmx_expire && !(rt->rt_flags & RTF_PROBEMTU)) { 412150351Sandre if (rt->rt_rmx.rmx_expire <= time_uptime) { 41353541Sshin rt->rt_flags |= RTF_PROBEMTU; 41453541Sshin } else { 41553541Sshin ap->nextstop = lmin(ap->nextstop, 41653541Sshin rt->rt_rmx.rmx_expire); 41753541Sshin } 41853541Sshin } 41953541Sshin 42053541Sshin return 0; 42153541Sshin} 42253541Sshin 42353541Sshin#define MTUTIMO_DEFAULT (60*1) 42453541Sshin 42553541Sshinstatic void 42653541Sshinin6_mtutimo(void *rock) 42753541Sshin{ 428183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 429183550Szec INIT_VNET_NET((struct vnet *) rock); 430183550Szec INIT_VNET_INET6((struct vnet *) rock); 43153541Sshin struct radix_node_head *rnh = rock; 43253541Sshin struct mtuex_arg arg; 43353541Sshin struct timeval atv; 43453541Sshin 43553541Sshin arg.rnh = rnh; 436160123Soleg arg.nextstop = time_uptime + MTUTIMO_DEFAULT; 437108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 43853541Sshin rnh->rnh_walktree(rnh, in6_mtuexpire, &arg); 439108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 44053541Sshin 44153541Sshin atv.tv_usec = 0; 442160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 443136184Ssuz if (atv.tv_sec < 0) { 44453541Sshin printf("invalid mtu expiration time on routing table\n"); 445160123Soleg arg.nextstop = time_uptime + 30; /* last resort */ 446160123Soleg atv.tv_sec = 30; 44753541Sshin } 448181803Sbz callout_reset(&V_rtq_mtutimer, tvtohz(&atv), in6_mtutimo, rock); 449183550Szec CURVNET_RESTORE(); 45053541Sshin} 45153541Sshin 45262587Sitojun#if 0 45362587Sitojunvoid 454171259Sdelphijin6_rtqdrain(void) 45562587Sitojun{ 456183550Szec INIT_VNET_NET(curvnet); 457181803Sbz struct radix_node_head *rnh = V_rt_tables[AF_INET6]; 45862587Sitojun struct rtqk_arg arg; 459120727Ssam 46062587Sitojun arg.found = arg.killed = 0; 46162587Sitojun arg.rnh = rnh; 46262587Sitojun arg.nextstop = 0; 46362587Sitojun arg.draining = 1; 46462587Sitojun arg.updating = 0; 465108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 46662587Sitojun rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 467108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 46862587Sitojun} 46962587Sitojun#endif 47062587Sitojun 47153541Sshin/* 47253541Sshin * Initialize our routing tree. 473178888Sjulian * XXX MRT When off == 0, we are being called from vfs_export.c 474178888Sjulian * so just set up their table and leave. (we know what the correct 475178888Sjulian * value should be so just use that).. FIX AFTER RELENG_7 is MFC'd 476178888Sjulian * see also comments in in_inithead() vfs_export.c and domain.h 47753541Sshin */ 47853541Sshinint 47953541Sshinin6_inithead(void **head, int off) 48053541Sshin{ 481183550Szec INIT_VNET_INET6(curvnet); 48253541Sshin struct radix_node_head *rnh; 48353541Sshin 484178888Sjulian if (!rn_inithead(head, offsetof(struct sockaddr_in6, sin6_addr) << 3)) 485178888Sjulian return 0; /* See above */ 48653541Sshin 487178888Sjulian if (off == 0) /* See above */ 488178888Sjulian return 1; /* only do the rest for the real thing */ 48953541Sshin 490185088Szec V_rtq_reallyold6 = 60*60; /* one hour is ``really old'' */ 491185088Szec V_rtq_minreallyold6 = 10; /* never automatically crank down to less */ 492185088Szec V_rtq_toomany6 = 128; /* 128 cached routes is ``too many'' */ 493185088Szec V_rtq_timeout6 = RTQ_TIMEOUT; 494185088Szec 49553541Sshin rnh = *head; 49653541Sshin rnh->rnh_addaddr = in6_addroute; 49753541Sshin rnh->rnh_matchaddr = in6_matroute; 49853541Sshin rnh->rnh_close = in6_clsroute; 499181803Sbz callout_init(&V_rtq_timer6, CALLOUT_MPSAFE); 50053541Sshin in6_rtqtimo(rnh); /* kick off timeout first time */ 501181803Sbz callout_init(&V_rtq_mtutimer, CALLOUT_MPSAFE); 50253541Sshin in6_mtutimo(rnh); /* kick off timeout first time */ 50353541Sshin return 1; 50453541Sshin} 505