/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright 1994, 1995 Massachusetts Institute of Technology
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $FreeBSD: src/sys/netinet/in_rmx.c,v 1.37.2.1 2001/05/14 08:23:49 ru Exp $
*/
/*
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
+#include <sys/protosw.h>
#include <sys/syslog.h>
+#include <sys/mcache.h>
+#include <kern/locks.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
+#include <netinet/in_arp.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#include <netinet6/nd6.h>
+
+extern int tvtohz(struct timeval *);
-extern int in_inithead __P((void **head, int off));
+static int in_rtqtimo_run; /* in_rtqtimo is scheduled to run */
+static void in_rtqtimo(void *);
+static void in_sched_rtqtimo(struct timeval *);
-#ifdef __APPLE__
-static void in_rtqtimo(void *rock);
-#endif
+static struct radix_node *in_addroute(void *, void *, struct radix_node_head *,
+ struct radix_node *);
+static struct radix_node *in_deleteroute(void *, void *,
+ struct radix_node_head *);
+static struct radix_node *in_matroute(void *, struct radix_node_head *);
+static struct radix_node *in_matroute_args(void *, struct radix_node_head *,
+ rn_matchf_t *f, void *);
+static void in_clsroute(struct radix_node *, struct radix_node_head *);
+static int in_rtqkill(struct radix_node *, void *);
-#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */
+static int in_ifadownkill(struct radix_node *, void *);
/*
* Do what we need to do when inserting a route.
*/
static struct radix_node *
in_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_in *sin = (struct sockaddr_in *)rt_key(rt);
+ struct sockaddr_in *sin = (struct sockaddr_in *)(void *)rt_key(rt);
struct radix_node *ret;
+ char dbuf[MAX_IPv4_STR_LEN], gbuf[MAX_IPv4_STR_LEN];
+ uint32_t flags = rt->rt_flags;
+ boolean_t verbose = (rt_verbose > 1);
+
+ 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));
+ }
/*
* For IP, all unicast non-host routes are automatically cloning.
*/
- if(IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
+ if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
rt->rt_flags |= RTF_MULTICAST;
+ }
- if(!(rt->rt_flags & (RTF_HOST | RTF_CLONING | RTF_MULTICAST))) {
+ if (!(rt->rt_flags & (RTF_HOST | RTF_CLONING | RTF_MULTICAST))) {
rt->rt_flags |= RTF_PRCLONING;
}
if (in_broadcast(sin->sin_addr, rt->rt_ifp)) {
rt->rt_flags |= RTF_BROADCAST;
} else {
-#define satosin(sa) ((struct sockaddr_in *)sa)
- if (satosin(rt->rt_ifa->ifa_addr)->sin_addr.s_addr
- == sin->sin_addr.s_addr)
+ /* Become a regular mutex */
+ RT_CONVERT_LOCK(rt);
+ IFA_LOCK_SPIN(rt->rt_ifa);
+ if (satosin(rt->rt_ifa->ifa_addr)->sin_addr.s_addr ==
+ sin->sin_addr.s_addr) {
rt->rt_flags |= RTF_LOCAL;
-#undef satosin
+ }
+ 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;
+ if (INTF_ADJUST_MTU_FOR_CLAT46(rt->rt_ifp)) {
+ rt->rt_rmx.rmx_mtu = IN6_LINKMTU(rt->rt_ifp);
+ /* Further adjust the size for CLAT46 expansion */
+ rt->rt_rmx.rmx_mtu -= CLAT46_HDR_EXPANSION_OVERHD;
+ }
+ }
ret = rn_addroute(v_arg, n_arg, head, treenodes);
- if (ret == NULL && rt->rt_flags & RTF_HOST) {
+ if (ret == NULL && (rt->rt_flags & RTF_HOST)) {
struct rtentry *rt2;
/*
* 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.
*/
- rt2 = rtalloc1((struct sockaddr *)sin, 0,
- RTF_CLONING | RTF_PRCLONING);
- if (rt2) {
- if (rt2->rt_flags & RTF_LLINFO &&
- rt2->rt_flags & RTF_HOST &&
- rt2->rt_gateway &&
- rt2->rt_gateway->sa_family == AF_LINK) {
- rtrequest(RTM_DELETE,
- (struct sockaddr *)rt_key(rt2),
- rt2->rt_gateway,
- rt_mask(rt2), rt2->rt_flags, 0);
+ rt2 = rtalloc1_scoped_locked(rt_key(rt), 0,
+ RTF_CLONING | RTF_PRCLONING, sin_get_ifscope(rt_key(rt)));
+ if (rt2 != NULL) {
+ char dbufc[MAX_IPv4_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 ARP 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
+ * prevents another thread from calling
+ * rt_setgate() on this route.
+ */
+ RT_UNLOCK(rt2);
+ (void) rtrequest_locked(RTM_DELETE, rt_key(rt2),
+ rt2->rt_gateway, rt_mask(rt2),
+ rt2->rt_flags, NULL);
ret = rn_addroute(v_arg, n_arg, head,
- treenodes);
+ treenodes);
+ } else {
+ RT_UNLOCK(rt2);
}
- rtfree(rt2);
+ rtfree_locked(rt2);
}
}
+
+ 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 *
+in_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);
+
+ rn = rn_delete(v_arg, netmask_arg, head);
+ if (rt_verbose > 1 && rn != NULL) {
+ char dbuf[MAX_IPv4_STR_LEN], gbuf[MAX_IPv4_STR_LEN];
+ struct rtentry *rt = (struct rtentry *)rn;
+
+ RT_LOCK(rt);
+ 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;
+}
+
+/*
+ * Validate (unexpire) an expiring AF_INET route.
+ */
+struct radix_node *
+in_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_IPv4_STR_LEN], gbuf[MAX_IPv4_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;
+}
+
+/*
+ * Similar to in_matroute_args except without the leaf-matching parameters.
+ */
+static struct radix_node *
+in_matroute(void *v_arg, struct radix_node_head *head)
+{
+ return in_matroute_args(v_arg, head, NULL, NULL);
+}
+
/*
* This code is the inverse of in_clsroute: on first reference, if we
* were managing the route, stop doing so and set the expiration timer
* back off again.
*/
static struct radix_node *
-in_matroute(void *v_arg, struct radix_node_head *head)
+in_matroute_args(void *v_arg, struct radix_node_head *head,
+ rn_matchf_t *f, void *w)
{
- struct radix_node *rn = rn_match(v_arg, head);
- struct rtentry *rt = (struct rtentry *)rn;
+ struct radix_node *rn = rn_match_args(v_arg, head, f, w);
- if(rt && rt->rt_refcnt == 0) { /* this is first reference */
- if(rt->rt_flags & RTPRF_OURS) {
- rt->rt_flags &= ~RTPRF_OURS;
- rt->rt_rmx.rmx_expire = 0;
- }
+ if (rn != NULL) {
+ RT_LOCK_SPIN((struct rtentry *)rn);
+ in_validate(rn);
+ RT_UNLOCK((struct rtentry *)rn);
}
return rn;
}
-static int rtq_reallyold = 60*60;
- /* one hour is ``really old'' */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTEXPIRE, rtexpire, CTLFLAG_RW,
- &rtq_reallyold , 0,
+/* one hour is ``really old'' */
+static uint32_t rtq_reallyold = 60 * 60;
+SYSCTL_UINT(_net_inet_ip, IPCTL_RTEXPIRE, rtexpire,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_reallyold, 0,
"Default expiration time on dynamically learned routes");
-
-static int rtq_minreallyold = 10;
- /* never automatically crank down to less */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTMINEXPIRE, rtminexpire, CTLFLAG_RW,
- &rtq_minreallyold , 0,
+
+/* never automatically crank down to less */
+static uint32_t rtq_minreallyold = 10;
+SYSCTL_UINT(_net_inet_ip, IPCTL_RTMINEXPIRE, rtminexpire,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_minreallyold, 0,
"Minimum time to attempt to hold onto dynamically learned routes");
-
-static int rtq_toomany = 128;
- /* 128 cached routes is ``too many'' */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTMAXCACHE, rtmaxcache, CTLFLAG_RW,
- &rtq_toomany , 0, "Upper limit on dynamically learned routes");
-
-#ifdef __APPLE__
-/* XXX LD11JUL02 Special case for AOL 5.1.2 connectivity issue to AirPort BS (Radar 2969954)
- * AOL is adding a circular route ("10.0.1.1/32 10.0.1.1") when establishing its ppp tunnel
- * to the AP BaseStation by removing the default gateway and replacing it with their tunnel entry point.
- * There is no apparent reason to add this route as there is a valid 10.0.1.1/24 route to the BS.
- * That circular route was ignored on previous version of MacOS X because of a routing bug
- * corrected with the merge to FreeBSD4.4 (a route generated from an RTF_CLONING route had the RTF_WASCLONED
- * flag set but did not have a reference to the parent route) and that entry was left in the RT. This workaround is
- * made in order to provide binary compatibility with AOL.
- * If we catch a process adding a circular route with a /32 from the routing socket, we error it out instead of
- * confusing the routing table with a wrong route to the previous default gateway
- * If for some reason a circular route is needed, turn this sysctl (net.inet.ip.check_route_selfref) to zero.
- */
-int check_routeselfref = 1;
-SYSCTL_INT(_net_inet_ip, OID_AUTO, check_route_selfref, CTLFLAG_RW,
- &check_routeselfref , 0, "");
-#endif
-__private_extern__ int use_routegenid = 1;
-SYSCTL_INT(_net_inet_ip, OID_AUTO, use_route_genid, CTLFLAG_RW,
- &use_routegenid , 0, "");
+/* 128 cached routes is ``too many'' */
+static uint32_t rtq_toomany = 128;
+SYSCTL_UINT(_net_inet_ip, IPCTL_RTMAXCACHE, rtmaxcache,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &rtq_toomany, 0,
+ "Upper limit on dynamically learned routes");
/*
* On last reference drop, mark the route as belong to us so that it can be
static void
in_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
+#pragma unused(head)
+ char dbuf[MAX_IPv4_STR_LEN], gbuf[MAX_IPv4_STR_LEN];
struct rtentry *rt = (struct rtentry *)rn;
+ boolean_t verbose = (rt_verbose > 1);
- if(!(rt->rt_flags & RTF_UP))
- return; /* prophylactic measures */
+ LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
+ RT_LOCK_ASSERT_HELD(rt);
- 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 & (RTF_WASCLONED | RTPRF_OURS))
- != RTF_WASCLONED)
+ if (rt->rt_flags & RTPRF_OURS) {
return;
+ }
+
+ if (!(rt->rt_flags & (RTF_WASCLONED | RTF_DYNAMIC))) {
+ return;
+ }
+
+ if (verbose) {
+ rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf));
+ }
/*
- * As requested by David Greenman:
- * If rtq_reallyold is 0, just delete the route without
- * waiting for a timeout cycle to kill it.
+ * Delete the route immediately if RTF_DELCLONE is set or
+ * if route caching is disabled (rtq_reallyold set to 0).
+ * Otherwise, let it expire and be deleted by in_rtqkill().
*/
- if(rtq_reallyold != 0) {
- rt->rt_flags |= RTPRF_OURS;
- rt->rt_rmx.rmx_expire = time_second + rtq_reallyold;
+ 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
+ * deallocate it until we return from this routine by
+ * telling rtrequest that we're interested in it.
+ * Safe to drop rt_lock and use rt_key, rt_gateway since
+ * holding rnh_lock here prevents another thread from
+ * calling rt_setgate() on this route.
+ */
+ RT_UNLOCK(rt);
+ 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 {
- rtrequest(RTM_DELETE,
- (struct sockaddr *)rt_key(rt),
- rt->rt_gateway, rt_mask(rt),
- rt->rt_flags, 0);
+ uint64_t timenow;
+
+ timenow = net_uptime();
+ rt->rt_flags |= RTPRF_OURS;
+ 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 */
+ in_sched_rtqtimo(NULL);
}
}
struct rtqk_arg {
struct radix_node_head *rnh;
- int draining;
- int killed;
- int found;
int updating;
- time_t nextstop;
+ int draining;
+ uint32_t killed;
+ uint32_t found;
+ uint64_t nextstop;
};
/*
{
struct rtqk_arg *ap = rock;
struct rtentry *rt = (struct rtentry *)rn;
+ boolean_t verbose = (rt_verbose > 1);
+ uint64_t timenow;
int err;
- if(rt->rt_flags & RTPRF_OURS) {
- ap->found++;
+ timenow = net_uptime();
+ LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
+
+ RT_LOCK(rt);
+ if (rt->rt_flags & RTPRF_OURS) {
+ char dbuf[MAX_IPv4_STR_LEN], gbuf[MAX_IPv4_STR_LEN];
+
+ if (verbose) {
+ rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf));
+ }
- if(ap->draining || rt->rt_rmx.rmx_expire <= time_second) {
- if(rt->rt_refcnt > 0)
- panic("rtqkill route really not free");
+ 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) {
+ if (rt->rt_refcnt > 0) {
+ panic("%s: route %p marked with RTPRF_OURS "
+ "with non-zero refcnt (%u)", __func__,
+ rt, rt->rt_refcnt);
+ /* NOTREACHED */
+ }
- err = rtrequest(RTM_DELETE,
- (struct sockaddr *)rt_key(rt),
- rt->rt_gateway, rt_mask(rt),
- rt->rt_flags, 0);
- if(err) {
- log(LOG_WARNING, "in_rtqkill: error %d\n", err);
+ 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
+ * can no longer refer to 'rt' upon returning
+ * from rtrequest(). Safe to drop rt_lock and
+ * use rt_key, rt_gateway since holding rnh_lock
+ * here prevents another thread from calling
+ * rt_setgate() on this route.
+ */
+ RT_UNLOCK(rt);
+ err = rtrequest_locked(RTM_DELETE, rt_key(rt),
+ 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 - time_second
- > rtq_reallyold)) {
- rt->rt_rmx.rmx_expire = time_second
- + 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 {
+ RT_UNLOCK(rt);
}
return 0;
}
-static void
-in_rtqtimo_funnel(void *rock)
-{
- boolean_t funnel_state;
-
- funnel_state = thread_funnel_set(network_flock, TRUE);
- in_rtqtimo(rock);
- (void) thread_funnel_set(network_flock, FALSE);
-
-}
-#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
-in_rtqtimo(void *rock)
+in_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;
- int s;
-
- arg.found = arg.killed = 0;
+ static uint64_t last_adjusted_timeout = 0;
+ boolean_t verbose = (rt_verbose > 1);
+ uint64_t timenow;
+ uint32_t ours;
+
+ lck_mtx_lock(rnh_lock);
+ rnh = rt_tables[AF_INET];
+ VERIFY(rnh != NULL);
+
+ /* 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 = time_second + rtq_timeout;
- arg.draining = arg.updating = 0;
- s = splnet();
+ arg.nextstop = timenow + rtq_timeout;
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
- splx(s);
-
+ 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,
* than once in rtq_timeout seconds, to keep from cranking down too
* hard.
*/
- if((arg.found - arg.killed > rtq_toomany)
- && (time_second - last_adjusted_timeout >= rtq_timeout)
- && rtq_reallyold > rtq_minreallyold) {
- rtq_reallyold = 2*rtq_reallyold / 3;
- if(rtq_reallyold < rtq_minreallyold) {
+ 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 = time_second;
-#if DIAGNOSTIC
- log(LOG_DEBUG, "in_rtqtimo: adjusted rtq_reallyold to %d\n",
- 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;
- s = splnet();
rnh->rnh_walktree(rnh, in_rtqkill, &arg);
- splx(s);
}
atv.tv_usec = 0;
- atv.tv_sec = arg.nextstop - time_second;
- timeout(in_rtqtimo_funnel, rock, tvtohz(&atv));
+ atv.tv_sec = arg.nextstop - timenow;
+ /* re-arm the timer only if there's work to do */
+ in_rtqtimo_run = 0;
+ if (ours > 0) {
+ in_sched_rtqtimo(&atv);
+ } else if (verbose) {
+ log(LOG_DEBUG, "%s: not rescheduling timer\n", __func__);
+ }
+ lck_mtx_unlock(rnh_lock);
+}
+
+static void
+in_sched_rtqtimo(struct timeval *atv)
+{
+ LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
+
+ if (!in_rtqtimo_run) {
+ struct timeval tv;
+
+ 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);
+ }
+ in_rtqtimo_run = 1;
+ timeout(in_rtqtimo, NULL, tvtohz(atv));
+ }
}
void
in_rtqdrain(void)
{
- struct radix_node_head *rnh = rt_tables[AF_INET];
+ struct radix_node_head *rnh;
struct rtqk_arg arg;
- int s;
- arg.found = arg.killed = 0;
+
+ if (rt_verbose > 1) {
+ log(LOG_DEBUG, "%s: draining routes\n", __func__);
+ }
+
+ lck_mtx_lock(rnh_lock);
+ rnh = rt_tables[AF_INET];
+ 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, in_rtqkill, &arg);
- splx(s);
+ lck_mtx_unlock(rnh_lock);
}
/*
{
struct radix_node_head *rnh;
-#ifdef __APPLE__
- if (*head)
- return 1;
-#endif
+ /* If called from route_init(), make sure it is exactly once */
+ VERIFY(head != (void **)&rt_tables[AF_INET] || *head == NULL);
- if(!rn_inithead(head, off))
+ if (!rn_inithead(head, off)) {
return 0;
+ }
- if(head != (void **)&rt_tables[AF_INET]) /* BOGUS! */
- return 1; /* only do this for the real routing table */
-
+ /*
+ * 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_INET]) {
+ return 1; /* only do this for the real routing table */
+ }
rnh = *head;
rnh->rnh_addaddr = in_addroute;
+ rnh->rnh_deladdr = in_deleteroute;
rnh->rnh_matchaddr = in_matroute;
+ rnh->rnh_matchaddr_args = in_matroute_args;
rnh->rnh_close = in_clsroute;
- in_rtqtimo(rnh); /* kick off timeout first time */
return 1;
}
-\f
/*
* This zaps old routes when the interface goes down or interface
* address is deleted. In the latter case, it deletes static routes
static int
in_ifadownkill(struct radix_node *rn, void *xap)
{
+ char dbuf[MAX_IPv4_STR_LEN], gbuf[MAX_IPv4_STR_LEN];
struct in_ifadown_arg *ap = xap;
struct rtentry *rt = (struct rtentry *)rn;
+ boolean_t verbose = (rt_verbose != 0);
int err;
+ LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
+
+ RT_LOCK(rt);
if (rt->rt_ifa == ap->ifa &&
(ap->del || !(rt->rt_flags & RTF_STATIC))) {
+ rt_str(rt, dbuf, sizeof(dbuf), gbuf, sizeof(gbuf));
+ 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);
+ }
+ RT_ADDREF_LOCKED(rt); /* for us to free below */
/*
* We need to disable the automatic prune that happens
* in this case in rtrequest() because it will blow
* away the pointers that rn_walktree() needs in order
* continue our descent. We will end up deleting all
* the routes that rtrequest() would have in any case,
- * so that behavior is not needed there.
+ * so that behavior is not needed there. Safe to drop
+ * rt_lock and use rt_key, rt_gateway, since holding
+ * rnh_lock here prevents another thread from calling
+ * rt_setgate() on this route.
*/
rt->rt_flags &= ~(RTF_CLONING | RTF_PRCLONING);
- err = rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
- rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
- if (err) {
- log(LOG_WARNING, "in_ifadownkill: error %d\n", err);
+ RT_UNLOCK(rt);
+ err = rtrequest_locked(RTM_DELETE, rt_key(rt),
+ 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);
}
+ rtfree_locked(rt);
+ } else {
+ RT_UNLOCK(rt);
}
return 0;
}
struct in_ifadown_arg arg;
struct radix_node_head *rnh;
- if (ifa->ifa_addr->sa_family != AF_INET)
+ LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
+
+ /*
+ * Holding rnh_lock here prevents the possibility of
+ * ifa from changing (e.g. in_ifinit), so it is safe
+ * to access its ifa_addr without locking.
+ */
+ if (ifa->ifa_addr->sa_family != AF_INET) {
return 1;
+ }
+
+ /* trigger route cache reevaluation */
+ routegenid_inet_update();
arg.rnh = rnh = rt_tables[AF_INET];
arg.ifa = ifa;
arg.del = delete;
rnh->rnh_walktree(rnh, in_ifadownkill, &arg);
+ IFA_LOCK_SPIN(ifa);
ifa->ifa_flags &= ~IFA_ROUTE;
+ IFA_UNLOCK(ifa);
return 0;
}
projects / apple / xnu.git / blobdiff