[libvirt] [PATCH 22/26] Convert nwfilter ebtablesApplyDropAllRules to virFirewall
Daniel P. Berrange
berrange at redhat.com
Tue Apr 8 15:38:14 UTC 2014
Convert the nwfilter ebtablesApplyDropAllRules method to use the
virFirewall object APIs instead of creating shell scripts
using virBuffer APIs. This provides a performance improvement
through allowing direct use of firewalld dbus APIs and will
facilitate automated testing.
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/nwfilter/nwfilter_ebiptables_driver.c | 93 ++++++++-----------------------
tests/nwfilterebiptablestest.c | 75 +++++++++++++++++++++++++
2 files changed, 99 insertions(+), 69 deletions(-)
diff --git a/src/nwfilter/nwfilter_ebiptables_driver.c b/src/nwfilter/nwfilter_ebiptables_driver.c
index 62866ac..db6e324 100644
--- a/src/nwfilter/nwfilter_ebiptables_driver.c
+++ b/src/nwfilter/nwfilter_ebiptables_driver.c
@@ -3284,31 +3284,6 @@ ebtablesRemoveTmpSubChainsFW(virFirewallPtr fw,
}
static void
-ebtablesRenameTmpSubChain(virBufferPtr buf,
- bool incoming,
- const char *ifname,
- const char *protocol)
-{
- char tmpchain[MAX_CHAINNAME_LENGTH], chain[MAX_CHAINNAME_LENGTH];
- char tmpChainPrefix = incoming ? CHAINPREFIX_HOST_IN_TEMP
- : CHAINPREFIX_HOST_OUT_TEMP;
- char chainPrefix = incoming ? CHAINPREFIX_HOST_IN
- : CHAINPREFIX_HOST_OUT;
-
- if (protocol) {
- PRINT_CHAIN(tmpchain, tmpChainPrefix, ifname, protocol);
- PRINT_CHAIN(chain, chainPrefix, ifname, protocol);
- } else {
- PRINT_ROOT_CHAIN(tmpchain, tmpChainPrefix, ifname);
- PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
- }
-
- virBufferAsprintf(buf,
- "$EBT -t nat -E %s %s" CMD_SEPARATOR,
- tmpchain, chain);
-}
-
-static void
ebtablesRenameTmpSubChainFW(virFirewallPtr fw,
int incoming,
const char *ifname,
@@ -3333,14 +3308,6 @@ ebtablesRenameTmpSubChainFW(virFirewallPtr fw,
}
static void
-ebtablesRenameTmpRootChain(virBufferPtr buf,
- bool incoming,
- const char *ifname)
-{
- ebtablesRenameTmpSubChain(buf, incoming, ifname, NULL);
-}
-
-static void
ebtablesRenameTmpRootChainFW(virFirewallPtr fw,
bool incoming,
const char *ifname)
@@ -3642,60 +3609,48 @@ ebtablesApplyDHCPOnlyRules(const char *ifname,
static int
ebtablesApplyDropAllRules(const char *ifname)
{
- virBuffer buf = VIR_BUFFER_INITIALIZER;
char chain_in [MAX_CHAINNAME_LENGTH],
chain_out[MAX_CHAINNAME_LENGTH];
+ virFirewallPtr fw = virFirewallNew();
- if (!ebtables_cmd_path) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("cannot create rules since ebtables tool is "
- "missing."));
- return -1;
- }
-
- ebiptablesAllTeardown(ifname);
+ if (ebiptablesAllTeardown(ifname) < 0)
+ goto error;
- NWFILTER_SET_EBTABLES_SHELLVAR(&buf);
+ virFirewallStartTransaction(fw, 0);
- ebtablesCreateTmpRootChain(&buf, true, ifname);
- ebtablesCreateTmpRootChain(&buf, false, ifname);
+ ebtablesCreateTmpRootChainFW(fw, true, ifname);
+ ebtablesCreateTmpRootChainFW(fw, false, ifname);
PRINT_ROOT_CHAIN(chain_in, CHAINPREFIX_HOST_IN_TEMP, ifname);
PRINT_ROOT_CHAIN(chain_out, CHAINPREFIX_HOST_OUT_TEMP, ifname);
- virBufferAsprintf(&buf,
- CMD_DEF("$EBT -t nat -A %s -j DROP") CMD_SEPARATOR
- CMD_EXEC
- "%s",
-
- chain_in,
- CMD_STOPONERR(true));
-
- virBufferAsprintf(&buf,
- CMD_DEF("$EBT -t nat -A %s -j DROP") CMD_SEPARATOR
- CMD_EXEC
- "%s",
+ virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET,
+ "-t", "nat", "-A", chain_in,
+ "-j", "DROP", NULL);
- chain_out,
- CMD_STOPONERR(true));
+ virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET,
+ "-t", "nat", "-A", chain_out,
+ "-j", "DROP", NULL);
- ebtablesLinkTmpRootChain(&buf, true, ifname);
- ebtablesLinkTmpRootChain(&buf, false, ifname);
- ebtablesRenameTmpRootChain(&buf, true, ifname);
- ebtablesRenameTmpRootChain(&buf, false, ifname);
+ ebtablesLinkTmpRootChainFW(fw, true, ifname);
+ ebtablesLinkTmpRootChainFW(fw, false, ifname);
+ ebtablesRenameTmpRootChainFW(fw, true, ifname);
+ ebtablesRenameTmpRootChainFW(fw, false, ifname);
- if (ebiptablesExecCLI(&buf, false, NULL) < 0)
+ virMutexLock(&execCLIMutex);
+ if (virFirewallApply(fw) < 0) {
+ virMutexUnlock(&execCLIMutex);
goto tear_down_tmpebchains;
+ }
+ virMutexUnlock(&execCLIMutex);
+ virFirewallFree(fw);
return 0;
tear_down_tmpebchains:
ebtablesCleanAll(ifname);
-
- virReportError(VIR_ERR_BUILD_FIREWALL,
- "%s",
- _("Some rules could not be created."));
-
+ error:
+ virFirewallFree(fw);
return -1;
}
diff --git a/tests/nwfilterebiptablestest.c b/tests/nwfilterebiptablestest.c
index 3010668..f994331 100644
--- a/tests/nwfilterebiptablestest.c
+++ b/tests/nwfilterebiptablestest.c
@@ -426,6 +426,76 @@ testNWFilterEBIPTablesApplyDHCPOnlyRules(const void *opaque ATTRIBUTE_UNUSED)
}
+
+static int
+testNWFilterEBIPTablesApplyDropAllRules(const void *opaque ATTRIBUTE_UNUSED)
+{
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+ const char *expected =
+ "/usr/sbin/iptables -D libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FO-vnet0\n"
+ "/usr/sbin/iptables -D libvirt-out -m physdev --physdev-out vnet0 -g FO-vnet0\n"
+ "/usr/sbin/iptables -D libvirt-in -m physdev --physdev-in vnet0 -g FI-vnet0\n"
+ "/usr/sbin/iptables -D libvirt-host-in -m physdev --physdev-in vnet0 -g HI-vnet0\n"
+ "/usr/sbin/iptables -D libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n"
+ "/usr/sbin/iptables -F FO-vnet0\n"
+ "/usr/sbin/iptables -X FO-vnet0\n"
+ "/usr/sbin/iptables -F FI-vnet0\n"
+ "/usr/sbin/iptables -X FI-vnet0\n"
+ "/usr/sbin/iptables -F HI-vnet0\n"
+ "/usr/sbin/iptables -X HI-vnet0\n"
+ "/usr/sbin/ip6tables -D libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FO-vnet0\n"
+ "/usr/sbin/ip6tables -D libvirt-out -m physdev --physdev-out vnet0 -g FO-vnet0\n"
+ "/usr/sbin/ip6tables -D libvirt-in -m physdev --physdev-in vnet0 -g FI-vnet0\n"
+ "/usr/sbin/ip6tables -D libvirt-host-in -m physdev --physdev-in vnet0 -g HI-vnet0\n"
+ "/usr/sbin/ip6tables -D libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n"
+ "/usr/sbin/ip6tables -F FO-vnet0\n"
+ "/usr/sbin/ip6tables -X FO-vnet0\n"
+ "/usr/sbin/ip6tables -F FI-vnet0\n"
+ "/usr/sbin/ip6tables -X FI-vnet0\n"
+ "/usr/sbin/ip6tables -F HI-vnet0\n"
+ "/usr/sbin/ip6tables -X HI-vnet0\n"
+ "/usr/sbin/ebtables -t nat -D PREROUTING -i vnet0 -j libvirt-I-vnet0\n"
+ "/usr/sbin/ebtables -t nat -D POSTROUTING -o vnet0 -j libvirt-O-vnet0\n"
+ "/usr/sbin/ebtables -t nat -L libvirt-I-vnet0\n"
+ "/usr/sbin/ebtables -t nat -L libvirt-O-vnet0\n"
+ "/usr/sbin/ebtables -t nat -F libvirt-I-vnet0\n"
+ "/usr/sbin/ebtables -t nat -X libvirt-I-vnet0\n"
+ "/usr/sbin/ebtables -t nat -F libvirt-O-vnet0\n"
+ "/usr/sbin/ebtables -t nat -X libvirt-O-vnet0\n"
+ "/usr/sbin/ebtables -t nat -N libvirt-J-vnet0\n"
+ "/usr/sbin/ebtables -t nat -N libvirt-P-vnet0\n"
+ "/usr/sbin/ebtables -t nat -A libvirt-J-vnet0 -j DROP\n"
+ "/usr/sbin/ebtables -t nat -A libvirt-P-vnet0 -j DROP\n"
+ "/usr/sbin/ebtables -t nat -A PREROUTING -i vnet0 -j libvirt-J-vnet0\n"
+ "/usr/sbin/ebtables -t nat -A POSTROUTING -o vnet0 -j libvirt-P-vnet0\n"
+ "/usr/sbin/ebtables -t nat -E libvirt-J-vnet0 libvirt-I-vnet0\n"
+ "/usr/sbin/ebtables -t nat -E libvirt-P-vnet0 libvirt-O-vnet0\n";
+ const char *actual = NULL;
+ int ret = -1;
+
+ virCommandSetDryRun(&buf, NULL, NULL);
+
+ if (ebiptables_driver.applyDropAllRules("vnet0") < 0)
+ goto cleanup;
+
+ if (virBufferError(&buf))
+ goto cleanup;
+
+ actual = virBufferCurrentContent(&buf);
+
+ if (STRNEQ_NULLABLE(actual, expected)) {
+ virtTestDifference(stderr, actual, expected);
+ goto cleanup;
+ }
+
+ ret = 0;
+ cleanup:
+ virCommandSetDryRun(NULL, NULL, NULL);
+ virBufferFreeAndReset(&buf);
+ return ret;
+}
+
+
static int
mymain(void)
{
@@ -466,6 +536,11 @@ mymain(void)
NULL) < 0)
ret = -1;
+ if (virtTestRun("ebiptablesApplyDropAllRules",
+ testNWFilterEBIPTablesApplyDropAllRules,
+ NULL) < 0)
+ ret = -1;
+
cleanup:
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
--
1.9.0
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