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Creating firewall rules for the virtual networks causes the kernel to load the conntrack module. This imposes a significant performance penalty on Linux network traffic. Thus we want to only take that hit if we actually have virtual networks running. We need to create global firewall rules during startup in order to "upgrade" rules for any running networks created by older libvirt. If no running networks are present though, we can safely delay setup until the time we actually start a network. Reviewed-by: Jim Fehlig <jfehlig@suse.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
204 lines
4.9 KiB
C
204 lines
4.9 KiB
C
/*
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* networkxml2firewalltest.c: Test iptables rule generation
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*
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* Copyright (C) 2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include "testutils.h"
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#include "viralloc.h"
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#if defined (__linux__)
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# include "network/bridge_driver_platform.h"
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# include "virbuffer.h"
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# define LIBVIRT_VIRFIREWALLPRIV_H_ALLOW
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# include "virfirewallpriv.h"
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# define LIBVIRT_VIRCOMMANDPRIV_H_ALLOW
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# include "vircommandpriv.h"
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# define VIR_FROM_THIS VIR_FROM_NONE
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# ifdef __linux__
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# define RULESTYPE "linux"
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# else
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# error "test case not ported to this platform"
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# endif
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static void
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testCommandDryRun(const char *const*args ATTRIBUTE_UNUSED,
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const char *const*env ATTRIBUTE_UNUSED,
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const char *input ATTRIBUTE_UNUSED,
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char **output,
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char **error,
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int *status,
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void *opaque ATTRIBUTE_UNUSED)
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{
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*status = 0;
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ignore_value(VIR_STRDUP_QUIET(*output, ""));
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ignore_value(VIR_STRDUP_QUIET(*error, ""));
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}
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static int testCompareXMLToArgvFiles(const char *xml,
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const char *cmdline,
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const char *baseargs)
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{
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char *expectargv = NULL;
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char *actualargv = NULL;
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virBuffer buf = VIR_BUFFER_INITIALIZER;
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virNetworkDefPtr def = NULL;
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int ret = -1;
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char *actual;
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virCommandSetDryRun(&buf, testCommandDryRun, NULL);
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if (!(def = virNetworkDefParseFile(xml)))
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goto cleanup;
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if (networkAddFirewallRules(def) < 0)
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goto cleanup;
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if (virBufferError(&buf))
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goto cleanup;
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actual = actualargv = virBufferContentAndReset(&buf);
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virTestClearCommandPath(actualargv);
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virCommandSetDryRun(NULL, NULL, NULL);
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/* The first network to be created populates the
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* libvirt global chains. We must skip args for
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* that if present
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*/
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if (STRPREFIX(actual, baseargs))
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actual += strlen(baseargs);
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if (virTestCompareToFile(actual, cmdline) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virBufferFreeAndReset(&buf);
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VIR_FREE(expectargv);
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VIR_FREE(actualargv);
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virNetworkDefFree(def);
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return ret;
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}
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struct testInfo {
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const char *name;
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const char *baseargs;
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};
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static int
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testCompareXMLToIPTablesHelper(const void *data)
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{
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int result = -1;
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const struct testInfo *info = data;
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char *xml = NULL;
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char *args = NULL;
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if (virAsprintf(&xml, "%s/networkxml2firewalldata/%s.xml",
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abs_srcdir, info->name) < 0 ||
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virAsprintf(&args, "%s/networkxml2firewalldata/%s-%s.args",
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abs_srcdir, info->name, RULESTYPE) < 0)
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goto cleanup;
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result = testCompareXMLToArgvFiles(xml, args, info->baseargs);
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cleanup:
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VIR_FREE(xml);
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VIR_FREE(args);
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return result;
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}
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static bool
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hasNetfilterTools(void)
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{
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return virFileIsExecutable(IPTABLES_PATH) &&
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virFileIsExecutable(IP6TABLES_PATH) &&
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virFileIsExecutable(EBTABLES_PATH);
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}
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static int
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mymain(void)
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{
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int ret = 0;
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VIR_AUTOFREE(char *)basefile = NULL;
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VIR_AUTOFREE(char *)baseargs = NULL;
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# define DO_TEST(name) \
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do { \
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struct testInfo info = { \
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name, baseargs, \
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}; \
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if (virTestRun("Network XML-2-iptables " name, \
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testCompareXMLToIPTablesHelper, &info) < 0) \
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ret = -1; \
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} while (0)
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virFirewallSetLockOverride(true);
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if (virFirewallSetBackend(VIR_FIREWALL_BACKEND_DIRECT) < 0) {
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if (!hasNetfilterTools()) {
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fprintf(stderr, "iptables/ip6tables/ebtables tools not present");
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return EXIT_AM_SKIP;
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}
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ret = -1;
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goto cleanup;
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}
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if (virAsprintf(&basefile, "%s/networkxml2firewalldata/base.args",
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abs_srcdir) < 0) {
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ret = -1;
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goto cleanup;
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}
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if (virTestLoadFile(basefile, &baseargs) < 0) {
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ret = -1;
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goto cleanup;
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}
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DO_TEST("nat-default");
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DO_TEST("nat-tftp");
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DO_TEST("nat-many-ips");
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DO_TEST("nat-no-dhcp");
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DO_TEST("nat-ipv6");
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DO_TEST("route-default");
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cleanup:
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIR_TEST_MAIN(mymain)
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#else /* ! defined (__linux__) */
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int main(void)
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{
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return EXIT_AM_SKIP;
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}
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#endif /* ! defined (__linux__) */
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