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f0e49f6631
insert flow entry. During the route lookup the critical section is exited. It may happen, that after route lookup we will be executed on an other CPU that already has such flowentry. Before this change we simply freed the flowentry and returned to ip_output() with failure. Actually there is nothing wrong with using previously allocated flow entry, updating it properly. Thus, make flowentry_insert() return the new either old fle, and make use of it. Count reuses as "collisions" and real inserts as "inserts". Reviewed by: adrian Sponsored by: Netflix Sponsored by: Nginx, Inc.
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*-
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* Copyright (c) 2014 Gleb Smirnoff <glebius@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <net/flowtable.h>
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#include <err.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "netstat.h"
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/*
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* Print flowtable statistics.
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*/
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static void
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print_stats(struct flowtable_stat *stat)
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{
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#define p(f, m) if (stat->f || sflag <= 1) \
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printf(m, (uintmax_t)stat->f, plural(stat->f))
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#define p2(f, m) if (stat->f || sflag <= 1) \
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printf(m, (uintmax_t)stat->f, plurales(stat->f))
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p(ft_lookups, "\t%ju lookup%s\n");
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p(ft_hits, "\t%ju hit%s\n");
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p2(ft_misses, "\t%ju miss%s\n");
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p(ft_inserts, "\t%ju insert%s\n");
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p(ft_collisions, "\t%ju collision%s\n");
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p(ft_free_checks, "\t%ju free check%s\n");
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p(ft_frees, "\t%ju free%s\n");
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p(ft_fail_lle_invalid,
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"\t%ju lookup%s with not resolved Layer 2 address\n");
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#undef p2
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#undef p
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}
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void
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flowtable_stats(void)
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{
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struct flowtable_stat stat;
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size_t len = sizeof(stat);
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if (!live)
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return;
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if (sysctlbyname("net.flowtable.ip4.stat", &stat, &len, NULL, 0) == 0) {
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printf("flowtable for IPv4:\n");
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print_stats(&stat);
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}
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if (sysctlbyname("net.flowtable.ip6.stat", &stat, &len, NULL, 0) == 0) {
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printf("flowtable for IPv6:\n");
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print_stats(&stat);
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}
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}
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