in6_rmx.c revision 185747
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 185747 2008-12-07 21:15:43Z kmacy $"); 77174510Sobrien 7853541Sshin#include <sys/param.h> 7953541Sshin#include <sys/systm.h> 8053541Sshin#include <sys/kernel.h> 8153541Sshin#include <sys/sysctl.h> 8253541Sshin#include <sys/queue.h> 8353541Sshin#include <sys/socket.h> 8453541Sshin#include <sys/socketvar.h> 8553541Sshin#include <sys/mbuf.h> 86185747Skmacy#include <sys/rwlock.h> 8753541Sshin#include <sys/syslog.h> 88120727Ssam#include <sys/callout.h> 89181803Sbz#include <sys/vimage.h> 9053541Sshin 9153541Sshin#include <net/if.h> 9253541Sshin#include <net/route.h> 93185571Sbz#include <net/vnet.h> 94185571Sbz 9553541Sshin#include <netinet/in.h> 9653541Sshin#include <netinet/ip_var.h> 9753541Sshin#include <netinet/in_var.h> 9853541Sshin 9962587Sitojun#include <netinet/ip6.h> 10053541Sshin#include <netinet6/ip6_var.h> 10153541Sshin 10262587Sitojun#include <netinet/icmp6.h> 103121283Sume#include <netinet6/nd6.h> 104185571Sbz#include <netinet6/vinet6.h> 10553541Sshin 10653541Sshin#include <netinet/tcp.h> 10753541Sshin#include <netinet/tcp_seq.h> 10853541Sshin#include <netinet/tcp_timer.h> 10953541Sshin#include <netinet/tcp_var.h> 11053541Sshin 111175162Sobrienextern int in6_inithead(void **head, int off); 11253541Sshin 11362587Sitojun#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */ 11453541Sshin 11553541Sshin/* 11653541Sshin * Do what we need to do when inserting a route. 11753541Sshin */ 11853541Sshinstatic struct radix_node * 11953541Sshinin6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, 120171260Sdelphij struct radix_node *treenodes) 12153541Sshin{ 12253541Sshin struct rtentry *rt = (struct rtentry *)treenodes; 12353541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt); 12453541Sshin struct radix_node *ret; 12553541Sshin 12653541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 12753541Sshin rt->rt_flags |= RTF_MULTICAST; 12853541Sshin 12953541Sshin /* 13053541Sshin * A little bit of help for both IPv6 output and input: 13153541Sshin * For local addresses, we make sure that RTF_LOCAL is set, 13253541Sshin * with the thought that this might one day be used to speed up 13353541Sshin * ip_input(). 13453541Sshin * 13553541Sshin * We also mark routes to multicast addresses as such, because 13653541Sshin * it's easy to do and might be useful (but this is much more 13753541Sshin * dubious since it's so easy to inspect the address). (This 13853541Sshin * is done above.) 13953541Sshin * 14053541Sshin * XXX 14153541Sshin * should elaborate the code. 14253541Sshin */ 14353541Sshin if (rt->rt_flags & RTF_HOST) { 14453541Sshin if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr) 14553541Sshin ->sin6_addr, 14653541Sshin &sin6->sin6_addr)) { 14753541Sshin rt->rt_flags |= RTF_LOCAL; 14853541Sshin } 14953541Sshin } 15053541Sshin 151122922Sandre if (!rt->rt_rmx.rmx_mtu && rt->rt_ifp) 152121283Sume rt->rt_rmx.rmx_mtu = IN6_LINKMTU(rt->rt_ifp); 15353541Sshin 15453541Sshin ret = rn_addroute(v_arg, n_arg, head, treenodes); 15553541Sshin if (ret == NULL && rt->rt_flags & RTF_HOST) { 15653541Sshin struct rtentry *rt2; 15753541Sshin /* 15853541Sshin * We are trying to add a host route, but can't. 15953541Sshin * Find out if it is because of an 16053541Sshin * ARP entry and delete it if so. 16153541Sshin */ 162122921Sandre rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING); 16353541Sshin if (rt2) { 16453541Sshin if (rt2->rt_flags & RTF_LLINFO && 16553541Sshin rt2->rt_flags & RTF_HOST && 16653541Sshin rt2->rt_gateway && 16753541Sshin rt2->rt_gateway->sa_family == AF_LINK) { 168121770Ssam rtexpunge(rt2); 169121770Ssam RTFREE_LOCKED(rt2); 17053541Sshin ret = rn_addroute(v_arg, n_arg, head, 17153541Sshin treenodes); 172121770Ssam } else 173121770Ssam RTFREE_LOCKED(rt2); 17453541Sshin } 17553541Sshin } else if (ret == NULL && rt->rt_flags & RTF_CLONING) { 17653541Sshin struct rtentry *rt2; 17753541Sshin /* 17853541Sshin * We are trying to add a net route, but can't. 17953541Sshin * The following case should be allowed, so we'll make a 18053541Sshin * special check for this: 18153541Sshin * Two IPv6 addresses with the same prefix is assigned 18253541Sshin * to a single interrface. 18353541Sshin * # ifconfig if0 inet6 3ffe:0501::1 prefix 64 alias (*1) 18453541Sshin * # ifconfig if0 inet6 3ffe:0501::2 prefix 64 alias (*2) 18553541Sshin * In this case, (*1) and (*2) want to add the same 18653541Sshin * net route entry, 3ffe:0501:: -> if0. 18753541Sshin * This case should not raise an error. 18853541Sshin */ 189122921Sandre rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING); 19053541Sshin if (rt2) { 19153541Sshin if ((rt2->rt_flags & (RTF_CLONING|RTF_HOST|RTF_GATEWAY)) 19253541Sshin == RTF_CLONING 19353541Sshin && rt2->rt_gateway 19453541Sshin && rt2->rt_gateway->sa_family == AF_LINK 19553541Sshin && rt2->rt_ifp == rt->rt_ifp) { 19653541Sshin ret = rt2->rt_nodes; 19753541Sshin } 198120727Ssam RTFREE_LOCKED(rt2); 19953541Sshin } 20053541Sshin } 20153541Sshin return ret; 20253541Sshin} 20353541Sshin 20453541Sshin/* 20553541Sshin * This code is the inverse of in6_clsroute: on first reference, if we 20653541Sshin * were managing the route, stop doing so and set the expiration timer 20753541Sshin * back off again. 20853541Sshin */ 20953541Sshinstatic struct radix_node * 21053541Sshinin6_matroute(void *v_arg, struct radix_node_head *head) 21153541Sshin{ 21253541Sshin struct radix_node *rn = rn_match(v_arg, head); 21353541Sshin struct rtentry *rt = (struct rtentry *)rn; 21453541Sshin 21553541Sshin if (rt && rt->rt_refcnt == 0) { /* this is first reference */ 21653541Sshin if (rt->rt_flags & RTPRF_OURS) { 21753541Sshin rt->rt_flags &= ~RTPRF_OURS; 21853541Sshin rt->rt_rmx.rmx_expire = 0; 21953541Sshin } 22053541Sshin } 22153541Sshin return rn; 22253541Sshin} 22353541Sshin 22462604SitojunSYSCTL_DECL(_net_inet6_ip6); 22562604Sitojun 226185088Szec#ifdef VIMAGE_GLOBALS 227185088Szecstatic int rtq_reallyold6; 228185088Szecstatic int rtq_minreallyold6; 229185088Szecstatic int rtq_toomany6; 230185088Szec#endif 231185088Szec 232185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTEXPIRE, 233185348Szec rtexpire, CTLFLAG_RW, rtq_reallyold6 , 0, ""); 234120913Sume 235185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTMINEXPIRE, 236185348Szec rtminexpire, CTLFLAG_RW, rtq_minreallyold6 , 0, ""); 237120913Sume 238185348SzecSYSCTL_V_INT(V_NET, vnet_inet6, _net_inet6_ip6, IPV6CTL_RTMAXCACHE, 239185348Szec rtmaxcache, CTLFLAG_RW, rtq_toomany6 , 0, ""); 24053541Sshin 241120913Sume 24253541Sshin/* 24353541Sshin * On last reference drop, mark the route as belong to us so that it can be 24453541Sshin * timed out. 24553541Sshin */ 24653541Sshinstatic void 24753541Sshinin6_clsroute(struct radix_node *rn, struct radix_node_head *head) 24853541Sshin{ 249183550Szec INIT_VNET_INET6(curvnet); 25053541Sshin struct rtentry *rt = (struct rtentry *)rn; 25153541Sshin 252120727Ssam RT_LOCK_ASSERT(rt); 253120727Ssam 25453541Sshin if (!(rt->rt_flags & RTF_UP)) 25553541Sshin return; /* prophylactic measures */ 25653541Sshin 25753541Sshin if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST) 25853541Sshin return; 25953541Sshin 260108250Shsu if ((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS)) != RTF_WASCLONED) 26153541Sshin return; 26253541Sshin 26353541Sshin /* 26453541Sshin * As requested by David Greenman: 265181832Sbz * If rtq_reallyold6 is 0, just delete the route without 26653541Sshin * waiting for a timeout cycle to kill it. 26753541Sshin */ 268181832Sbz if (V_rtq_reallyold6 != 0) { 26953541Sshin rt->rt_flags |= RTPRF_OURS; 270181832Sbz rt->rt_rmx.rmx_expire = time_uptime + V_rtq_reallyold6; 27153541Sshin } else { 272121770Ssam rtexpunge(rt); 27353541Sshin } 27453541Sshin} 27553541Sshin 27653541Sshinstruct rtqk_arg { 27753541Sshin struct radix_node_head *rnh; 27853541Sshin int mode; 27953541Sshin int updating; 28053541Sshin int draining; 28153541Sshin int killed; 28253541Sshin int found; 28353541Sshin time_t nextstop; 28453541Sshin}; 28553541Sshin 28653541Sshin/* 28753541Sshin * Get rid of old routes. When draining, this deletes everything, even when 28853541Sshin * the timeout is not expired yet. When updating, this makes sure that 289181832Sbz * nothing has a timeout longer than the current value of rtq_reallyold6. 29053541Sshin */ 29153541Sshinstatic int 29253541Sshinin6_rtqkill(struct radix_node *rn, void *rock) 29353541Sshin{ 294183550Szec INIT_VNET_INET6(curvnet); 29553541Sshin struct rtqk_arg *ap = rock; 29653541Sshin struct rtentry *rt = (struct rtentry *)rn; 29753541Sshin int err; 29853541Sshin 29953541Sshin if (rt->rt_flags & RTPRF_OURS) { 30053541Sshin ap->found++; 30153541Sshin 302150351Sandre if (ap->draining || rt->rt_rmx.rmx_expire <= time_uptime) { 30353541Sshin if (rt->rt_refcnt > 0) 30453541Sshin panic("rtqkill route really not free"); 30553541Sshin 30653541Sshin err = rtrequest(RTM_DELETE, 30753541Sshin (struct sockaddr *)rt_key(rt), 30853541Sshin rt->rt_gateway, rt_mask(rt), 30953541Sshin rt->rt_flags, 0); 31053541Sshin if (err) { 31153541Sshin log(LOG_WARNING, "in6_rtqkill: error %d", err); 31253541Sshin } else { 31353541Sshin ap->killed++; 31453541Sshin } 31553541Sshin } else { 31653541Sshin if (ap->updating 317150351Sandre && (rt->rt_rmx.rmx_expire - time_uptime 318181832Sbz > V_rtq_reallyold6)) { 319150351Sandre rt->rt_rmx.rmx_expire = time_uptime 320181832Sbz + V_rtq_reallyold6; 32153541Sshin } 32253541Sshin ap->nextstop = lmin(ap->nextstop, 32353541Sshin rt->rt_rmx.rmx_expire); 32453541Sshin } 32553541Sshin } 32653541Sshin 32753541Sshin return 0; 32853541Sshin} 32953541Sshin 33053541Sshin#define RTQ_TIMEOUT 60*10 /* run no less than once every ten minutes */ 331185088Szec#ifdef VIMAGE_GLOBALS 332185088Szecstatic int rtq_timeout6; 333180088Skanstatic struct callout rtq_timer6; 334185088Szec#endif 33553541Sshin 33653541Sshinstatic void 33753541Sshinin6_rtqtimo(void *rock) 33853541Sshin{ 339183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 340183550Szec INIT_VNET_NET((struct vnet *) rock); 341183550Szec INIT_VNET_INET6((struct vnet *) rock); 34253541Sshin struct radix_node_head *rnh = rock; 34353541Sshin struct rtqk_arg arg; 34453541Sshin struct timeval atv; 34553541Sshin static time_t last_adjusted_timeout = 0; 34653541Sshin 34753541Sshin arg.found = arg.killed = 0; 34853541Sshin arg.rnh = rnh; 349181803Sbz arg.nextstop = time_uptime + V_rtq_timeout6; 35053541Sshin arg.draining = arg.updating = 0; 351108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 35253541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 353108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 35453541Sshin 35553541Sshin /* 35653541Sshin * Attempt to be somewhat dynamic about this: 35753541Sshin * If there are ``too many'' routes sitting around taking up space, 35853541Sshin * then crank down the timeout, and see if we can't make some more 35953541Sshin * go away. However, we make sure that we will never adjust more 360180084Sjulian * than once in rtq_timeout6 seconds, to keep from cranking down too 36153541Sshin * hard. 36253541Sshin */ 363181832Sbz if ((arg.found - arg.killed > V_rtq_toomany6) 364181803Sbz && (time_uptime - last_adjusted_timeout >= V_rtq_timeout6) 365181832Sbz && V_rtq_reallyold6 > V_rtq_minreallyold6) { 366181832Sbz V_rtq_reallyold6 = 2*V_rtq_reallyold6 / 3; 367181832Sbz if (V_rtq_reallyold6 < V_rtq_minreallyold6) { 368181832Sbz V_rtq_reallyold6 = V_rtq_minreallyold6; 36953541Sshin } 37053541Sshin 371160123Soleg last_adjusted_timeout = time_uptime; 37253541Sshin#ifdef DIAGNOSTIC 373181832Sbz log(LOG_DEBUG, "in6_rtqtimo: adjusted rtq_reallyold6 to %d", 374181832Sbz V_rtq_reallyold6); 37553541Sshin#endif 37653541Sshin arg.found = arg.killed = 0; 37753541Sshin arg.updating = 1; 378108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 37953541Sshin rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 380108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 38153541Sshin } 38253541Sshin 38353541Sshin atv.tv_usec = 0; 384160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 385181803Sbz callout_reset(&V_rtq_timer6, tvtohz(&atv), in6_rtqtimo, rock); 386183550Szec CURVNET_RESTORE(); 38753541Sshin} 38853541Sshin 38953541Sshin/* 39053541Sshin * Age old PMTUs. 39153541Sshin */ 39253541Sshinstruct mtuex_arg { 39353541Sshin struct radix_node_head *rnh; 39453541Sshin time_t nextstop; 39553541Sshin}; 396185088Szec#ifdef VIMAGE_GLOBALS 397120727Ssamstatic struct callout rtq_mtutimer; 398185088Szec#endif 39953541Sshin 40053541Sshinstatic int 40153541Sshinin6_mtuexpire(struct radix_node *rn, void *rock) 40253541Sshin{ 40353541Sshin struct rtentry *rt = (struct rtentry *)rn; 40453541Sshin struct mtuex_arg *ap = rock; 40553541Sshin 40653541Sshin /* sanity */ 40753541Sshin if (!rt) 40853541Sshin panic("rt == NULL in in6_mtuexpire"); 40953541Sshin 41053541Sshin if (rt->rt_rmx.rmx_expire && !(rt->rt_flags & RTF_PROBEMTU)) { 411150351Sandre if (rt->rt_rmx.rmx_expire <= time_uptime) { 41253541Sshin rt->rt_flags |= RTF_PROBEMTU; 41353541Sshin } else { 41453541Sshin ap->nextstop = lmin(ap->nextstop, 41553541Sshin rt->rt_rmx.rmx_expire); 41653541Sshin } 41753541Sshin } 41853541Sshin 41953541Sshin return 0; 42053541Sshin} 42153541Sshin 42253541Sshin#define MTUTIMO_DEFAULT (60*1) 42353541Sshin 42453541Sshinstatic void 42553541Sshinin6_mtutimo(void *rock) 42653541Sshin{ 427183550Szec CURVNET_SET_QUIET((struct vnet *) rock); 428183550Szec INIT_VNET_NET((struct vnet *) rock); 429183550Szec INIT_VNET_INET6((struct vnet *) rock); 43053541Sshin struct radix_node_head *rnh = rock; 43153541Sshin struct mtuex_arg arg; 43253541Sshin struct timeval atv; 43353541Sshin 43453541Sshin arg.rnh = rnh; 435160123Soleg arg.nextstop = time_uptime + MTUTIMO_DEFAULT; 436108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 43753541Sshin rnh->rnh_walktree(rnh, in6_mtuexpire, &arg); 438108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 43953541Sshin 44053541Sshin atv.tv_usec = 0; 441160123Soleg atv.tv_sec = arg.nextstop - time_uptime; 442136184Ssuz if (atv.tv_sec < 0) { 44353541Sshin printf("invalid mtu expiration time on routing table\n"); 444160123Soleg arg.nextstop = time_uptime + 30; /* last resort */ 445160123Soleg atv.tv_sec = 30; 44653541Sshin } 447181803Sbz callout_reset(&V_rtq_mtutimer, tvtohz(&atv), in6_mtutimo, rock); 448183550Szec CURVNET_RESTORE(); 44953541Sshin} 45053541Sshin 45162587Sitojun#if 0 45262587Sitojunvoid 453171259Sdelphijin6_rtqdrain(void) 45462587Sitojun{ 455183550Szec INIT_VNET_NET(curvnet); 456181803Sbz struct radix_node_head *rnh = V_rt_tables[AF_INET6]; 45762587Sitojun struct rtqk_arg arg; 458120727Ssam 45962587Sitojun arg.found = arg.killed = 0; 46062587Sitojun arg.rnh = rnh; 46162587Sitojun arg.nextstop = 0; 46262587Sitojun arg.draining = 1; 46362587Sitojun arg.updating = 0; 464108250Shsu RADIX_NODE_HEAD_LOCK(rnh); 46562587Sitojun rnh->rnh_walktree(rnh, in6_rtqkill, &arg); 466108250Shsu RADIX_NODE_HEAD_UNLOCK(rnh); 46762587Sitojun} 46862587Sitojun#endif 46962587Sitojun 47053541Sshin/* 47153541Sshin * Initialize our routing tree. 472178888Sjulian * XXX MRT When off == 0, we are being called from vfs_export.c 473178888Sjulian * so just set up their table and leave. (we know what the correct 474178888Sjulian * value should be so just use that).. FIX AFTER RELENG_7 is MFC'd 475178888Sjulian * see also comments in in_inithead() vfs_export.c and domain.h 47653541Sshin */ 47753541Sshinint 47853541Sshinin6_inithead(void **head, int off) 47953541Sshin{ 480183550Szec INIT_VNET_INET6(curvnet); 48153541Sshin struct radix_node_head *rnh; 48253541Sshin 483178888Sjulian if (!rn_inithead(head, offsetof(struct sockaddr_in6, sin6_addr) << 3)) 484178888Sjulian return 0; /* See above */ 48553541Sshin 486178888Sjulian if (off == 0) /* See above */ 487178888Sjulian return 1; /* only do the rest for the real thing */ 48853541Sshin 489185088Szec V_rtq_reallyold6 = 60*60; /* one hour is ``really old'' */ 490185088Szec V_rtq_minreallyold6 = 10; /* never automatically crank down to less */ 491185088Szec V_rtq_toomany6 = 128; /* 128 cached routes is ``too many'' */ 492185088Szec V_rtq_timeout6 = RTQ_TIMEOUT; 493185088Szec 49453541Sshin rnh = *head; 49553541Sshin rnh->rnh_addaddr = in6_addroute; 49653541Sshin rnh->rnh_matchaddr = in6_matroute; 49753541Sshin rnh->rnh_close = in6_clsroute; 498181803Sbz callout_init(&V_rtq_timer6, CALLOUT_MPSAFE); 49953541Sshin in6_rtqtimo(rnh); /* kick off timeout first time */ 500181803Sbz callout_init(&V_rtq_mtutimer, CALLOUT_MPSAFE); 50153541Sshin in6_mtutimo(rnh); /* kick off timeout first time */ 50253541Sshin return 1; 50353541Sshin} 504