X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..cb3231590a3c94ab4375e2228bd5e86b0cf1ad7e:/bsd/netinet6/in6_rmx.c diff --git a/bsd/netinet6/in6_rmx.c b/bsd/netinet6/in6_rmx.c index 34f2fd320..5874aa079 100644 --- a/bsd/netinet6/in6_rmx.c +++ b/bsd/netinet6/in6_rmx.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003-2008 Apple Inc. All rights reserved. + * Copyright (c) 2003-2016 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -26,9 +26,6 @@ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ -/* $FreeBSD: src/sys/netinet6/in6_rmx.c,v 1.1.2.2 2001/07/03 11:01:52 ume Exp $ */ -/* $KAME: in6_rmx.c,v 1.10 2001/05/24 05:44:58 itojun Exp $ */ - /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. @@ -108,9 +105,11 @@ #include #include #include +#include #include #include -#include +#include +#include #include #include @@ -128,53 +127,68 @@ #include #include -extern int in6_inithead(void **head, int off); -static void in6_rtqtimo(void *rock); -static void in6_mtutimo(void *rock); -extern int tvtohz(struct timeval *); +extern int tvtohz(struct timeval *); + +static int in6_rtqtimo_run; /* in6_rtqtimo is scheduled to run */ +static void in6_rtqtimo(void *); +static void in6_sched_rtqtimo(struct timeval *); +static struct radix_node *in6_addroute(void *, void *, struct radix_node_head *, + struct radix_node *); +static struct radix_node *in6_deleteroute(void *, void *, + struct radix_node_head *); +static struct radix_node *in6_matroute(void *, struct radix_node_head *); static struct radix_node *in6_matroute_args(void *, struct radix_node_head *, rn_matchf_t *, void *); - -#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */ +static void in6_clsroute(struct radix_node *, struct radix_node_head *); +static int in6_rtqkill(struct radix_node *, void *); /* * Accessed by in6_addroute(), in6_deleteroute() and in6_rtqkill(), during * which the routing lock (rnh_lock) is held and thus protects the variable. */ -static int in6dynroutes; +static int in6dynroutes; /* * Do what we need to do when inserting a route. */ static struct radix_node * in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, - struct radix_node *treenodes) + struct radix_node *treenodes) { struct rtentry *rt = (struct rtentry *)treenodes; - struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt); + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)rt_key(rt); struct radix_node *ret; + char dbuf[MAX_IPv6_STR_LEN], gbuf[MAX_IPv6_STR_LEN]; + uint32_t flags = rt->rt_flags; + boolean_t verbose = (rt_verbose > 1); - lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED); RT_LOCK_ASSERT_HELD(rt); + if (verbose) { + rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf)); + } + /* * If this is a dynamic route (which is created via Redirect) and * we already have the maximum acceptable number of such route entries, * reject creating a new one. We could initiate garbage collection to * make available space right now, but the benefit would probably not * be worth the cleaning overhead; we only have to endure a slightly - * suboptimal path even without the redirecbted route. + * suboptimal path even without the redirected route. */ - if ((rt->rt_flags & RTF_DYNAMIC) != 0 && - ip6_maxdynroutes >= 0 && in6dynroutes >= ip6_maxdynroutes) - return (NULL); + if ((rt->rt_flags & RTF_DYNAMIC) && + ip6_maxdynroutes >= 0 && in6dynroutes >= ip6_maxdynroutes) { + return NULL; + } /* * For IPv6, all unicast non-host routes are automatically cloning. */ - if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) + if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { rt->rt_flags |= RTF_MULTICAST; + } if (!(rt->rt_flags & (RTF_HOST | RTF_CLONING | RTF_MULTICAST))) { rt->rt_flags |= RTF_PRCLONING; @@ -195,16 +209,18 @@ in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, * should elaborate the code. */ if (rt->rt_flags & RTF_HOST) { - if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr) - ->sin6_addr, - &sin6->sin6_addr)) { + IFA_LOCK_SPIN(rt->rt_ifa); + if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr)-> + sin6_addr, &sin6->sin6_addr)) { rt->rt_flags |= RTF_LOCAL; } + IFA_UNLOCK(rt->rt_ifa); } - if (!rt->rt_rmx.rmx_mtu && !(rt->rt_rmx.rmx_locks & RTV_MTU) - && rt->rt_ifp) + if (!rt->rt_rmx.rmx_mtu && !(rt->rt_rmx.rmx_locks & RTV_MTU) && + rt->rt_ifp) { rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; + } ret = rn_addroute(v_arg, n_arg, head, treenodes); if (ret == NULL && (rt->rt_flags & RTF_HOST)) { @@ -212,16 +228,35 @@ in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, /* * We are trying to add a host route, but can't. * Find out if it is because of an - * ARP entry and delete it if so. + * ND6 entry and delete it if so. */ - rt2 = rtalloc1_locked((struct sockaddr *)sin6, 0, - RTF_CLONING | RTF_PRCLONING); - if (rt2) { + rt2 = rtalloc1_scoped_locked((struct sockaddr *)sin6, 0, + RTF_CLONING | RTF_PRCLONING, sin6_get_ifscope(rt_key(rt))); + if (rt2 != NULL) { + char dbufc[MAX_IPv6_STR_LEN]; + RT_LOCK(rt2); + if (verbose) { + rt_str(rt2, dbufc, sizeof(dbufc), NULL, 0); + } + if ((rt2->rt_flags & RTF_LLINFO) && (rt2->rt_flags & RTF_HOST) && rt2->rt_gateway != NULL && rt2->rt_gateway->sa_family == AF_LINK) { + if (verbose) { + log(LOG_DEBUG, "%s: unable to insert " + "route to %s:%s, flags=%b, due to " + "existing ND6 route %s->%s " + "flags=%b, attempting to delete\n", + __func__, dbuf, + (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS, + dbufc, (rt2->rt_ifp != NULL) ? + rt2->rt_ifp->if_xname : "", + rt2->rt_flags, RTF_BITS); + } /* * Safe to drop rt_lock and use rt_key, * rt_gateway, since holding rnh_lock here @@ -231,9 +266,9 @@ in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, RT_UNLOCK(rt2); (void) rtrequest_locked(RTM_DELETE, rt_key(rt2), rt2->rt_gateway, rt_mask(rt2), - rt2->rt_flags, 0); + rt2->rt_flags, NULL); ret = rn_addroute(v_arg, n_arg, head, - treenodes); + treenodes); } else { RT_UNLOCK(rt2); } @@ -253,15 +288,15 @@ in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, * net route entry, 3ffe:0501:: -> if0. * This case should not raise an error. */ - rt2 = rtalloc1_locked((struct sockaddr *)sin6, 0, - RTF_CLONING | RTF_PRCLONING); - if (rt2) { + rt2 = rtalloc1_scoped_locked((struct sockaddr *)sin6, 0, + RTF_CLONING | RTF_PRCLONING, sin6_get_ifscope(rt_key(rt))); + if (rt2 != NULL) { RT_LOCK(rt2); - if ((rt2->rt_flags & (RTF_CLONING|RTF_HOST|RTF_GATEWAY)) - == RTF_CLONING - && rt2->rt_gateway - && rt2->rt_gateway->sa_family == AF_LINK - && rt2->rt_ifp == rt->rt_ifp) { + if ((rt2->rt_flags & (RTF_CLONING | RTF_HOST | + RTF_GATEWAY)) == RTF_CLONING && + rt2->rt_gateway && + rt2->rt_gateway->sa_family == AF_LINK && + rt2->rt_ifp == rt->rt_ifp) { ret = rt2->rt_nodes; } RT_UNLOCK(rt2); @@ -269,29 +304,99 @@ in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head, } } - if (ret != NULL && (rt->rt_flags & RTF_DYNAMIC) != 0) + if (ret != NULL && (rt->rt_flags & RTF_DYNAMIC)) { in6dynroutes++; + } + + if (!verbose) { + goto done; + } + if (ret != NULL) { + if (flags != rt->rt_flags) { + log(LOG_DEBUG, "%s: route to %s->%s->%s inserted, " + "oflags=%b, flags=%b\n", __func__, + dbuf, gbuf, (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", flags, RTF_BITS, + rt->rt_flags, RTF_BITS); + } else { + log(LOG_DEBUG, "%s: route to %s->%s->%s inserted, " + "flags=%b\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS); + } + } else { + log(LOG_DEBUG, "%s: unable to insert route to %s->%s->%s, " + "flags=%b, already exists\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS); + } +done: return ret; } static struct radix_node * -in6_deleteroute(void * v_arg, void *netmask_arg, struct radix_node_head *head) +in6_deleteroute(void *v_arg, void *netmask_arg, struct radix_node_head *head) { struct radix_node *rn; - lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED); rn = rn_delete(v_arg, netmask_arg, head); if (rn != NULL) { struct rtentry *rt = (struct rtentry *)rn; - RT_LOCK_SPIN(rt); - if ((rt->rt_flags & RTF_DYNAMIC) != 0) + + RT_LOCK(rt); + if (rt->rt_flags & RTF_DYNAMIC) { in6dynroutes--; + } + if (rt_verbose > 1) { + char dbuf[MAX_IPv6_STR_LEN], gbuf[MAX_IPv6_STR_LEN]; + + rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf)); + log(LOG_DEBUG, "%s: route to %s->%s->%s deleted, " + "flags=%b\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS); + } RT_UNLOCK(rt); } + return rn; +} - return (rn); +/* + * Validate (unexpire) an expiring AF_INET6 route. + */ +struct radix_node * +in6_validate(struct radix_node *rn) +{ + struct rtentry *rt = (struct rtentry *)rn; + + RT_LOCK_ASSERT_HELD(rt); + + /* This is first reference? */ + if (rt->rt_refcnt == 0) { + if (rt_verbose > 2) { + char dbuf[MAX_IPv6_STR_LEN], gbuf[MAX_IPv6_STR_LEN]; + + rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf)); + log(LOG_DEBUG, "%s: route to %s->%s->%s validated, " + "flags=%b\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS); + } + + /* + * It's one of ours; unexpire it. If the timer is already + * scheduled, let it run later as it won't re-arm itself + * if there's nothing to do. + */ + if (rt->rt_flags & RTPRF_OURS) { + rt->rt_flags &= ~RTPRF_OURS; + rt_setexpire(rt, 0); + } + } + return rn; } /* @@ -300,7 +405,7 @@ in6_deleteroute(void * v_arg, void *netmask_arg, struct radix_node_head *head) static struct radix_node * in6_matroute(void *v_arg, struct radix_node_head *head) { - return (in6_matroute_args(v_arg, head, NULL, NULL)); + return in6_matroute_args(v_arg, head, NULL, NULL); } /* @@ -313,61 +418,65 @@ in6_matroute_args(void *v_arg, struct radix_node_head *head, rn_matchf_t *f, void *w) { struct radix_node *rn = rn_match_args(v_arg, head, f, w); - struct rtentry *rt = (struct rtentry *)rn; - /* This is first reference? */ - if (rt != NULL) { - RT_LOCK_SPIN(rt); - if (rt->rt_refcnt == 0 && (rt->rt_flags & RTPRF_OURS)) { - rt->rt_flags &= ~RTPRF_OURS; - rt->rt_rmx.rmx_expire = 0; - } - RT_UNLOCK(rt); + if (rn != NULL) { + RT_LOCK_SPIN((struct rtentry *)rn); + in6_validate(rn); + RT_UNLOCK((struct rtentry *)rn); } - return (rn); + return rn; } SYSCTL_DECL(_net_inet6_ip6); -static int rtq_reallyold = 60*60; - /* one hour is ``really old'' */ -SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RTEXPIRE, rtexpire, - CTLFLAG_RW, &rtq_reallyold , 0, ""); - -static int rtq_minreallyold = 10; - /* never automatically crank down to less */ -SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RTMINEXPIRE, rtminexpire, - CTLFLAG_RW, &rtq_minreallyold , 0, ""); +/* one hour is ``really old'' */ +static uint32_t rtq_reallyold = 60 * 60; +SYSCTL_UINT(_net_inet6_ip6, IPV6CTL_RTEXPIRE, rtexpire, + CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_reallyold, 0, ""); -static int rtq_toomany = 128; - /* 128 cached routes is ``too many'' */ -SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RTMAXCACHE, rtmaxcache, - CTLFLAG_RW, &rtq_toomany , 0, ""); +/* never automatically crank down to less */ +static uint32_t rtq_minreallyold = 10; +SYSCTL_UINT(_net_inet6_ip6, IPV6CTL_RTMINEXPIRE, rtminexpire, + CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_minreallyold, 0, ""); +/* 128 cached routes is ``too many'' */ +static uint32_t rtq_toomany = 128; +SYSCTL_UINT(_net_inet6_ip6, IPV6CTL_RTMAXCACHE, rtmaxcache, + CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_toomany, 0, ""); /* * On last reference drop, mark the route as belong to us so that it can be * timed out. */ static void -in6_clsroute(struct radix_node *rn, __unused struct radix_node_head *head) +in6_clsroute(struct radix_node *rn, struct radix_node_head *head) { +#pragma unused(head) + char dbuf[MAX_IPv6_STR_LEN], gbuf[MAX_IPv6_STR_LEN]; struct rtentry *rt = (struct rtentry *)rn; + boolean_t verbose = (rt_verbose > 1); - lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED); RT_LOCK_ASSERT_HELD(rt); - if (!(rt->rt_flags & RTF_UP)) - return; /* prophylactic measures */ - - if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST) + if (!(rt->rt_flags & RTF_UP)) { + return; /* prophylactic measures */ + } + if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST) { return; + } - if (rt->rt_flags & RTPRF_OURS) + if (rt->rt_flags & RTPRF_OURS) { return; + } - if (!(rt->rt_flags & (RTF_WASCLONED | RTF_DYNAMIC))) + if (!(rt->rt_flags & (RTF_WASCLONED | RTF_DYNAMIC))) { return; + } + + if (verbose) { + rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf)); + } /* * Delete the route immediately if RTF_DELCLONE is set or @@ -375,6 +484,14 @@ in6_clsroute(struct radix_node *rn, __unused struct radix_node_head *head) * Otherwise, let it expire and be deleted by in6_rtqkill(). */ if ((rt->rt_flags & RTF_DELCLONE) || rtq_reallyold == 0) { + int err; + + if (verbose) { + log(LOG_DEBUG, "%s: deleting route to %s->%s->%s, " + "flags=%b\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS); + } /* * Delete the route from the radix tree but since we are * called when the route's reference count is 0, don't @@ -385,31 +502,50 @@ in6_clsroute(struct radix_node *rn, __unused struct radix_node_head *head) * from calling rt_setgate() on this route. */ RT_UNLOCK(rt); - if (rtrequest_locked(RTM_DELETE, rt_key(rt), - rt->rt_gateway, rt_mask(rt), rt->rt_flags, &rt) == 0) { + err = rtrequest_locked(RTM_DELETE, rt_key(rt), + rt->rt_gateway, rt_mask(rt), rt->rt_flags, &rt); + if (err == 0) { /* Now let the caller free it */ RT_LOCK(rt); RT_REMREF_LOCKED(rt); } else { RT_LOCK(rt); + if (!verbose) { + rt_str(rt, dbuf, sizeof(dbuf), + gbuf, sizeof(gbuf)); + } + log(LOG_ERR, "%s: error deleting route to " + "%s->%s->%s, flags=%b, err=%d\n", __func__, + dbuf, gbuf, (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", rt->rt_flags, + RTF_BITS, err); } } else { - struct timeval timenow; + uint64_t timenow; - getmicrotime(&timenow); + timenow = net_uptime(); rt->rt_flags |= RTPRF_OURS; - rt->rt_rmx.rmx_expire = timenow.tv_sec + rtq_reallyold; + rt_setexpire(rt, timenow + rtq_reallyold); + + if (verbose) { + log(LOG_DEBUG, "%s: route to %s->%s->%s invalidated, " + "flags=%b, expire=T+%u\n", __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS, rt->rt_expire - timenow); + } + + /* We have at least one entry; arm the timer if not already */ + in6_sched_rtqtimo(NULL); } } struct rtqk_arg { struct radix_node_head *rnh; - int mode; int updating; int draining; - int killed; - int found; - time_t nextstop; + uint32_t killed; + uint32_t found; + uint64_t nextstop; }; /* @@ -424,23 +560,42 @@ in6_rtqkill(struct radix_node *rn, void *rock) { struct rtqk_arg *ap = rock; struct rtentry *rt = (struct rtentry *)rn; + boolean_t verbose = (rt_verbose > 1); + uint64_t timenow; int err; - struct timeval timenow; - getmicrotime(&timenow); - lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED); + timenow = net_uptime(); + LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED); RT_LOCK(rt); if (rt->rt_flags & RTPRF_OURS) { - ap->found++; + char dbuf[MAX_IPv6_STR_LEN], gbuf[MAX_IPv6_STR_LEN]; - if (ap->draining || rt->rt_rmx.rmx_expire <= timenow.tv_sec || - ((rt->rt_flags & RTF_DYNAMIC) != 0 && - ip6_maxdynroutes >= 0 && + if (verbose) { + rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf)); + } + + ap->found++; + VERIFY(rt->rt_expire == 0 || rt->rt_rmx.rmx_expire != 0); + VERIFY(rt->rt_expire != 0 || rt->rt_rmx.rmx_expire == 0); + if (ap->draining || rt->rt_expire <= timenow || + ((rt->rt_flags & RTF_DYNAMIC) && ip6_maxdynroutes >= 0 && in6dynroutes > ip6_maxdynroutes / 2)) { - if (rt->rt_refcnt > 0) - panic("rtqkill route really not free"); + if (rt->rt_refcnt > 0) { + panic("%s: route %p marked with RTPRF_OURS " + "with non-zero refcnt (%u)", __func__, + rt, rt->rt_refcnt); + /* NOTREACHED */ + } + if (verbose) { + log(LOG_DEBUG, "%s: deleting route to " + "%s->%s->%s, flags=%b, draining=%d\n", + __func__, dbuf, gbuf, (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", rt->rt_flags, + RTF_BITS, ap->draining); + } + RT_ADDREF_LOCKED(rt); /* for us to free below */ /* * Delete this route since we're done with it; * the route may be freed afterwards, so we @@ -452,21 +607,40 @@ in6_rtqkill(struct radix_node *rn, void *rock) */ RT_UNLOCK(rt); err = rtrequest_locked(RTM_DELETE, rt_key(rt), - rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0); - if (err) { - log(LOG_WARNING, "in6_rtqkill: error %d", err); + rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); + if (err != 0) { + RT_LOCK(rt); + if (!verbose) { + rt_str(rt, dbuf, sizeof(dbuf), + gbuf, sizeof(gbuf)); + } + log(LOG_ERR, "%s: error deleting route to " + "%s->%s->%s, flags=%b, err=%d\n", __func__, + dbuf, gbuf, (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", rt->rt_flags, + RTF_BITS, err); + RT_UNLOCK(rt); } else { ap->killed++; } + rtfree_locked(rt); } else { - if (ap->updating - && (rt->rt_rmx.rmx_expire - timenow.tv_sec - > rtq_reallyold)) { - rt->rt_rmx.rmx_expire = timenow.tv_sec - + rtq_reallyold; + uint64_t expire = (rt->rt_expire - timenow); + + if (ap->updating && expire > rtq_reallyold) { + rt_setexpire(rt, timenow + rtq_reallyold); + if (verbose) { + log(LOG_DEBUG, "%s: route to " + "%s->%s->%s, flags=%b, adjusted " + "expire=T+%u (was T+%u)\n", + __func__, dbuf, gbuf, + (rt->rt_ifp != NULL) ? + rt->rt_ifp->if_xname : "", + rt->rt_flags, RTF_BITS, + (rt->rt_expire - timenow), expire); + } } - ap->nextstop = lmin(ap->nextstop, - rt->rt_rmx.rmx_expire); + ap->nextstop = lmin(ap->nextstop, rt->rt_expire); RT_UNLOCK(rt); } } else { @@ -476,28 +650,39 @@ in6_rtqkill(struct radix_node *rn, void *rock) return 0; } -#define RTQ_TIMEOUT 60*10 /* run no less than once every ten minutes */ +#define RTQ_TIMEOUT 60*10 /* run no less than once every ten minutes */ static int rtq_timeout = RTQ_TIMEOUT; static void -in6_rtqtimo(void *rock) +in6_rtqtimo(void *targ) { - struct radix_node_head *rnh = rock; +#pragma unused(targ) + struct radix_node_head *rnh; struct rtqk_arg arg; struct timeval atv; - static time_t last_adjusted_timeout = 0; - struct timeval timenow; + static uint64_t last_adjusted_timeout = 0; + boolean_t verbose = (rt_verbose > 1); + uint64_t timenow; + uint32_t ours; lck_mtx_lock(rnh_lock); - /* Get the timestamp after we acquire the lock for better accuracy */ - getmicrotime(&timenow); + rnh = rt_tables[AF_INET6]; + VERIFY(rnh != NULL); - arg.found = arg.killed = 0; + /* Get the timestamp after we acquire the lock for better accuracy */ + timenow = net_uptime(); + if (verbose) { + log(LOG_DEBUG, "%s: initial nextstop is T+%u seconds\n", + __func__, rtq_timeout); + } + bzero(&arg, sizeof(arg)); arg.rnh = rnh; - arg.nextstop = timenow.tv_sec + rtq_timeout; - arg.draining = arg.updating = 0; + arg.nextstop = timenow + rtq_timeout; rnh->rnh_walktree(rnh, in6_rtqkill, &arg); - + if (verbose) { + log(LOG_DEBUG, "%s: found %u, killed %u\n", __func__, + arg.found, arg.killed); + } /* * Attempt to be somewhat dynamic about this: * If there are ``too many'' routes sitting around taking up space, @@ -506,112 +691,79 @@ in6_rtqtimo(void *rock) * than once in rtq_timeout seconds, to keep from cranking down too * hard. */ - if ((arg.found - arg.killed > rtq_toomany) - && (timenow.tv_sec - last_adjusted_timeout >= rtq_timeout) - && rtq_reallyold > rtq_minreallyold) { - rtq_reallyold = 2*rtq_reallyold / 3; + ours = (arg.found - arg.killed); + if (ours > rtq_toomany && + ((timenow - last_adjusted_timeout) >= (uint64_t)rtq_timeout) && + rtq_reallyold > rtq_minreallyold) { + rtq_reallyold = 2 * rtq_reallyold / 3; if (rtq_reallyold < rtq_minreallyold) { rtq_reallyold = rtq_minreallyold; } - last_adjusted_timeout = timenow.tv_sec; -#if DIAGNOSTIC - log(LOG_DEBUG, "in6_rtqtimo: adjusted rtq_reallyold to %d", - rtq_reallyold); -#endif + last_adjusted_timeout = timenow; + if (verbose) { + log(LOG_DEBUG, "%s: adjusted rtq_reallyold to %d " + "seconds\n", __func__, rtq_reallyold); + } arg.found = arg.killed = 0; arg.updating = 1; rnh->rnh_walktree(rnh, in6_rtqkill, &arg); } atv.tv_usec = 0; - atv.tv_sec = arg.nextstop - timenow.tv_sec; + atv.tv_sec = arg.nextstop - timenow; + /* re-arm the timer only if there's work to do */ + in6_rtqtimo_run = 0; + if (ours > 0) { + in6_sched_rtqtimo(&atv); + } else if (verbose) { + log(LOG_DEBUG, "%s: not rescheduling timer\n", __func__); + } lck_mtx_unlock(rnh_lock); - timeout(in6_rtqtimo, rock, tvtohz(&atv)); } -/* - * Age old PMTUs. - */ -struct mtuex_arg { - struct radix_node_head *rnh; - time_t nextstop; -}; - -static int -in6_mtuexpire(struct radix_node *rn, void *rock) +static void +in6_sched_rtqtimo(struct timeval *atv) { - struct rtentry *rt = (struct rtentry *)rn; - struct mtuex_arg *ap = rock; - struct timeval timenow; + LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED); - getmicrotime(&timenow); + if (!in6_rtqtimo_run) { + struct timeval tv; - /* sanity */ - if (!rt) - panic("rt == NULL in in6_mtuexpire"); - - RT_LOCK(rt); - if (rt->rt_rmx.rmx_expire && !(rt->rt_flags & RTF_PROBEMTU)) { - if (rt->rt_rmx.rmx_expire <= timenow.tv_sec) { - rt->rt_flags |= RTF_PROBEMTU; - } else { - ap->nextstop = lmin(ap->nextstop, - rt->rt_rmx.rmx_expire); + if (atv == NULL) { + tv.tv_usec = 0; + tv.tv_sec = MAX(rtq_timeout / 10, 1); + atv = &tv; } + if (rt_verbose > 1) { + log(LOG_DEBUG, "%s: timer scheduled in " + "T+%llus.%lluu\n", __func__, + (uint64_t)atv->tv_sec, (uint64_t)atv->tv_usec); + } + in6_rtqtimo_run = 1; + timeout(in6_rtqtimo, NULL, tvtohz(atv)); } - RT_UNLOCK(rt); - - return 0; } -#define MTUTIMO_DEFAULT (60*1) - -static void -in6_mtutimo(void *rock) +void +in6_rtqdrain(void) { - struct radix_node_head *rnh = rock; - struct mtuex_arg arg; - struct timeval atv; - struct timeval timenow; - - getmicrotime(&timenow); - - arg.rnh = rnh; - arg.nextstop = timenow.tv_sec + MTUTIMO_DEFAULT; - lck_mtx_lock(rnh_lock); - rnh->rnh_walktree(rnh, in6_mtuexpire, &arg); + struct radix_node_head *rnh; + struct rtqk_arg arg; - atv.tv_usec = 0; - atv.tv_sec = arg.nextstop; - if (atv.tv_sec < timenow.tv_sec) { -#if DIAGNOSTIC - log(LOG_DEBUG, "IPv6: invalid mtu expiration time on routing table\n"); -#endif - arg.nextstop = timenow.tv_sec + 30; /*last resort*/ + if (rt_verbose > 1) { + log(LOG_DEBUG, "%s: draining routes\n", __func__); } - atv.tv_sec -= timenow.tv_sec; - lck_mtx_unlock(rnh_lock); - timeout(in6_mtutimo, rock, tvtohz(&atv)); -} -#if 0 -void -in6_rtqdrain() -{ - struct radix_node_head *rnh = rt_tables[AF_INET6]; - struct rtqk_arg arg; - int s; - arg.found = arg.killed = 0; + lck_mtx_lock(rnh_lock); + rnh = rt_tables[AF_INET6]; + VERIFY(rnh != NULL); + bzero(&arg, sizeof(arg)); arg.rnh = rnh; - arg.nextstop = 0; arg.draining = 1; - arg.updating = 0; - s = splnet(); rnh->rnh_walktree(rnh, in6_rtqkill, &arg); - splx(s); + lck_mtx_unlock(rnh_lock); } -#endif /* * Initialize our routing tree. @@ -621,19 +773,27 @@ in6_inithead(void **head, int off) { struct radix_node_head *rnh; - if (!rn_inithead(head, off)) - return 0; + /* If called from route_init(), make sure it is exactly once */ + VERIFY(head != (void **)&rt_tables[AF_INET6] || *head == NULL); - if (head != (void **)&rt_tables[AF_INET6]) /* BOGUS! */ - return 1; /* only do this for the real routing table */ + if (!rn_inithead(head, off)) { + return 0; + } + /* + * We can get here from nfs_subs.c as well, in which case this + * won't be for the real routing table and thus we're done; + * this also takes care of the case when we're called more than + * once from anywhere but route_init(). + */ + if (head != (void **)&rt_tables[AF_INET6]) { + return 1; /* only do this for the real routing table */ + } rnh = *head; rnh->rnh_addaddr = in6_addroute; rnh->rnh_deladdr = in6_deleteroute; rnh->rnh_matchaddr = in6_matroute; rnh->rnh_matchaddr_args = in6_matroute_args; rnh->rnh_close = in6_clsroute; - in6_rtqtimo(rnh); /* kick off timeout first time */ - in6_mtutimo(rnh); /* kick off timeout first time */ return 1; }