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fib_algo.c
(41.78 KB)
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fib_algo.h
(4.28 KB)
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mpath_ctl.c
(5.54 KB)
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nhgrp.c
(8.81 KB)
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nhgrp_ctl.c
(21.99 KB)
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nhgrp_var.h
(2.86 KB)
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nhop.c
(10.51 KB)
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nhop.h
(8.29 KB)
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nhop_ctl.c
(23.22 KB)
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nhop_utils.c
(4.8 KB)
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nhop_utils.h
(6.45 KB)
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nhop_var.h
(4.18 KB)
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route_ctl.c
(36.3 KB)
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route_ctl.h
(5.84 KB)
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route_ddb.c
(6.44 KB)
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route_helpers.c
(10.28 KB)
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route_ifaddrs.c
(5.8 KB)
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route_tables.c
(9.32 KB)
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route_temporal.c
(4.29 KB)
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route_var.h
(12.6 KB)
Editing: route_temporal.c
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2020 Alexander V. Chernikov * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * This file contains code responsible for expiring temporal routes * (typically, redirect-originated) from the route tables. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/socket.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/ck.h> #include <sys/rmlock.h> #include <sys/callout.h> #include <net/if.h> #include <net/route.h> #include <net/route/route_ctl.h> #include <net/route/route_var.h> #include <net/vnet.h> /* * Callback returning 1 for the expired routes. * Updates time of the next nearest route expiration as a side effect. */ static int expire_route(const struct rtentry *rt, const struct nhop_object *nh, void *arg) { time_t *next_callout; if (rt->rt_expire == 0) return (0); if (rt->rt_expire <= time_uptime) return (1); next_callout = (time_t *)arg; /* * Update next_callout to determine the next ts to * run the callback at. */ if (*next_callout == 0 || *next_callout > rt->rt_expire) *next_callout = rt->rt_expire; return (0); } /* * Per-rnh callout function traversing the tree and deleting * expired routes. Calculates next callout run by looking at * the rt_expire time for the remaining temporal routes. */ static void expire_callout(void *arg) { struct rib_head *rnh; time_t next_expire; int seconds; rnh = (struct rib_head *)arg; CURVNET_SET(rnh->rib_vnet); next_expire = 0; rib_walk_del(rnh->rib_fibnum, rnh->rib_family, expire_route, (void *)&next_expire, 1); RIB_WLOCK(rnh); if (next_expire > 0) { seconds = (next_expire - time_uptime); if (seconds < 0) seconds = 0; callout_reset_sbt(&rnh->expire_callout, SBT_1S * seconds, SBT_1MS * 500, expire_callout, rnh, 0); rnh->next_expire = next_expire; } else { /* * Before resetting next_expire, check that tmproutes_update() * has not kicked in and scheduled another invocation. */ if (callout_pending(&rnh->expire_callout) == 0) rnh->next_expire = 0; } RIB_WUNLOCK(rnh); CURVNET_RESTORE(); } /* * Function responsible for updating the time of the next calllout * w.r.t. new temporal routes insertion. * * Called by the routing code upon adding new temporal route * to the tree. RIB_WLOCK must be held. */ void tmproutes_update(struct rib_head *rnh, struct rtentry *rt) { int seconds; RIB_WLOCK_ASSERT(rnh); if (rnh->next_expire == 0 || rnh->next_expire > rt->rt_expire) { /* * Callback is not scheduled, is executing, * or is scheduled for a later time than we need. * * Schedule the one for the current @rt expiration time. */ seconds = (rt->rt_expire - time_uptime); if (seconds < 0) seconds = 0; callout_reset_sbt(&rnh->expire_callout, SBT_1S * seconds, SBT_1MS * 500, expire_callout, rnh, 0); rnh->next_expire = rt->rt_expire; } } void tmproutes_init(struct rib_head *rh) { callout_init(&rh->expire_callout, 1); } void tmproutes_destroy(struct rib_head *rh) { callout_drain(&rh->expire_callout); }
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