[libvirt] [PATCH v2] nwfilter: fix loadable module support
Stefan Berger
stefanb at linux.vnet.ibm.com
Tue Jun 15 12:08:46 UTC 2010
Following Daniel Berrange's suggestion of introducing another driver
interface, I now wrote the below patch where the nwfilter driver
registers the functions to instantiate and teardown the nwfilters with a
function in conf/domain_nwfilter.c called virDomainConfNWFilterRegister.
Previous helper functions that were called from qemu_driver.c and
qemu_conf.c were move into conf/domain_nwfilter.h with slight renaming
done for consistency. Those functions now call the function expored by
domain_nwfilter.c, which in turn call the functions of the new driver
interface, if available.
Signed-off-by: Stefan Berger <stefanb at us.ibm.com>
---
src/Makefile.am | 3 -
src/conf/domain_nwfilter.c | 51 ++++++++++++++++++++++++
src/conf/domain_nwfilter.h | 68
+++++++++++++++++++++++++++++++++
src/libvirt_private.syms | 5 ++
src/nwfilter/nwfilter_driver.c | 22 ++++++++++
src/nwfilter/nwfilter_gentech_driver.h | 17 --------
src/qemu/qemu_conf.c | 11 ++---
src/qemu/qemu_driver.c | 2
8 files changed, 155 insertions(+), 24 deletions(-)
Index: libvirt-acl/src/nwfilter/nwfilter_gentech_driver.h
===================================================================
--- libvirt-acl.orig/src/nwfilter/nwfilter_gentech_driver.h
+++ libvirt-acl/src/nwfilter/nwfilter_gentech_driver.h
@@ -67,21 +67,4 @@ void virNWFilterDomainFWUpdateCB(void *p
const char *name ATTRIBUTE_UNUSED,
void *data);
-
-/* tear down an interface's filter before tearing down the interface */
-static inline void
-virNWFilterTearNWFilter(virDomainNetDefPtr net) {
- if ((net->filter) && (net->ifname))
- virNWFilterTeardownFilter(net);
-}
-
-
-static inline void
-virNWFilterTearVMNWFilters(virDomainObjPtr vm) {
- int i;
-
- for (i = 0; i < vm->def->nnets; i++)
- virNWFilterTearNWFilter(vm->def->nets[i]);
-}
-
#endif
Index: libvirt-acl/src/qemu/qemu_conf.c
===================================================================
--- libvirt-acl.orig/src/qemu/qemu_conf.c
+++ libvirt-acl/src/qemu/qemu_conf.c
@@ -54,7 +54,7 @@
#include "network.h"
#include "macvtap.h"
#include "cpu/cpu.h"
-#include "nwfilter/nwfilter_gentech_driver.h"
+#include "domain_nwfilter.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
@@ -1514,9 +1514,10 @@ int qemudExtractVersion(struct qemud_dri
/**
* qemudPhysIfaceConnect:
* @conn: pointer to virConnect object
+ * @driver: pointer to the qemud_driver
* @net: pointer to he VM's interface description with direct device type
- * @linkdev: The name of the physical interface to link the macvtap to
- * @brmode: The mode to put the macvtap device into
+ * @qemuCmdFlags: flags for qemu
+ * @vmuuid: The UUID of the VM (needed by 802.1Qbh)
*
* Returns a filedescriptor on success or -1 in case of error.
*/
@@ -1555,7 +1556,7 @@ qemudPhysIfaceConnect(virConnectPtr conn
if (rc >= 0) {
if ((net->filter) && (net->ifname)) {
- err = virNWFilterInstantiateFilter(conn, net);
+ err = virNWFilterInstantiateNWFilter(conn, net);
if (err) {
close(rc);
rc = -1;
@@ -1688,7 +1689,7 @@ qemudNetworkIfaceConnect(virConnectPtr c
if (tapfd >= 0) {
if ((net->filter) && (net->ifname)) {
- err = virNWFilterInstantiateFilter(conn, net);
+ err = virNWFilterInstantiateNWFilter(conn, net);
if (err) {
close(tapfd);
tapfd = -1;
Index: libvirt-acl/src/qemu/qemu_driver.c
===================================================================
--- libvirt-acl.orig/src/qemu/qemu_driver.c
+++ libvirt-acl/src/qemu/qemu_driver.c
@@ -81,7 +81,7 @@
#include "xml.h"
#include "cpu/cpu.h"
#include "macvtap.h"
-#include "nwfilter/nwfilter_gentech_driver.h"
+#include "domain_nwfilter.h"
#include "hooks.h"
#include "storage_file.h"
Index: libvirt-acl/src/Makefile.am
===================================================================
--- libvirt-acl.orig/src/Makefile.am
+++ libvirt-acl/src/Makefile.am
@@ -97,7 +97,8 @@ DRIVER_SOURCES = \
# Domain driver generic impl APIs
DOMAIN_CONF_SOURCES = \
conf/capabilities.c conf/capabilities.h \
- conf/domain_conf.c conf/domain_conf.h
+ conf/domain_conf.c conf/domain_conf.h \
+ conf/domain_nwfilter.c conf/domain_nwfilter.h
DOMAIN_EVENT_SOURCES = \
conf/domain_event.c conf/domain_event.h
Index: libvirt-acl/src/conf/domain_nwfilter.h
===================================================================
--- /dev/null
+++ libvirt-acl/src/conf/domain_nwfilter.h
@@ -0,0 +1,68 @@
+/*
+ * domain_nwfilter.h:
+ *
+ * Copyright (C) 2010 IBM Corporation
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Stefan Berger <stefanb at us.ibm.com>
+ */
+#ifndef DOMAIN_NWFILTER_H
+# define DOMAIN_NWFILTER_H
+
+typedef int (*virDomainConfInstantiateNWFilter)(virConnectPtr conn,
+ virDomainNetDefPtr net);
+typedef void (*virDomainConfTeardownNWFilter)(virDomainNetDefPtr net);
+
+typedef struct {
+ virDomainConfInstantiateNWFilter instantiateFilter;
+ virDomainConfTeardownNWFilter teardownFilter;
+} virDomainConfNWFilterDriver;
+typedef virDomainConfNWFilterDriver *virDomainConfNWFilterDriverPtr;
+
+void virDomainConfNWFilterRegister(virDomainConfNWFilterDriverPtr driver);
+
+int virDomainConfNWFilterInstantiate(virConnectPtr conn,
+ virDomainNetDefPtr net);
+void virDomainConfNWFilterTeardown(virDomainNetDefPtr net);
+
+
+/* helper functions */
+
+static inline
+int virNWFilterInstantiateNWFilter(virConnectPtr conn,
+ const virDomainNetDefPtr net)
+{
+ return virDomainConfNWFilterInstantiate(conn, net);
+}
+
+/* tear down an interface's filter before tearing down the interface */
+static inline void
+virNWFilterTearNWFilter(virDomainNetDefPtr net) {
+ if ((net->filter) && (net->ifname))
+ virDomainConfNWFilterTeardown(net);
+}
+
+
+static inline void
+virNWFilterTearVMNWFilters(virDomainObjPtr vm) {
+ int i;
+
+ for (i = 0; i < vm->def->nnets; i++)
+ virNWFilterTearNWFilter(vm->def->nets[i]);
+}
+
+#endif /* DOMAIN_NWFILTER_H */
Index: libvirt-acl/src/conf/domain_nwfilter.c
===================================================================
--- /dev/null
+++ libvirt-acl/src/conf/domain_nwfilter.c
@@ -0,0 +1,51 @@
+/*
+ * domain_nwfilter.c:
+ *
+ * Copyright (C) 2010 IBM Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Stefan Berger <stefanb at us.ibm.com>
+ */
+
+#include <config.h>
+
+#include "internal.h"
+
+#include "datatypes.h"
+#include "domain_conf.h"
+#include "domain_nwfilter.h"
+
+static virDomainConfNWFilterDriverPtr nwfilterDriver;
+
+void
+virDomainConfNWFilterRegister(virDomainConfNWFilterDriverPtr driver) {
+ nwfilterDriver = driver;
+}
+
+int
+virDomainConfNWFilterInstantiate(virConnectPtr conn,
+ virDomainNetDefPtr net) {
+ if (nwfilterDriver)
+ return nwfilterDriver->instantiateFilter(conn, net);
+ /* driver module not available -- don't indicate failure */
+ return 0;
+}
+
+void
+virDomainConfNWFilterTeardown(virDomainNetDefPtr net) {
+ if (nwfilterDriver)
+ nwfilterDriver->teardownFilter(net);
+}
Index: libvirt-acl/src/libvirt_private.syms
===================================================================
--- libvirt-acl.orig/src/libvirt_private.syms
+++ libvirt-acl/src/libvirt_private.syms
@@ -264,6 +264,11 @@ virDomainEventDispatchDefaultFunc;
virDomainEventDispatch;
virDomainEventQueueDispatch;
+# domain_nwfilter.h
+virDomainConfNWFilterRegister;
+virDomainConfNWFilterInstantiate;
+virDomainConfNWFilterTeardown;
+
# ebtables.h
ebtablesAddForwardAllowIn;
Index: libvirt-acl/src/nwfilter/nwfilter_driver.c
===================================================================
--- libvirt-acl.orig/src/nwfilter/nwfilter_driver.c
+++ libvirt-acl/src/nwfilter/nwfilter_driver.c
@@ -33,6 +33,7 @@
#include "datatypes.h"
#include "memory.h"
#include "domain_conf.h"
+#include "domain_nwfilter.h"
#include "nwfilter_driver.h"
#include "nwfilter_gentech_driver.h"
@@ -410,6 +411,19 @@ cleanup:
}
+static int
+nwfilterInstantiateFilter(virConnectPtr conn,
+ virDomainNetDefPtr net) {
+ return virNWFilterInstantiateFilter(conn, net);
+}
+
+
+static void
+nwfilterTeardownFilter(virDomainNetDefPtr net) {
+ virNWFilterTeardownFilter(net);
+}
+
+
static virNWFilterDriver nwfilterDriver = {
.name = "nwfilter",
.open = nwfilterOpen,
@@ -432,8 +446,16 @@ static virStateDriver stateDriver = {
.active = nwfilterDriverActive,
};
+
+static virDomainConfNWFilterDriver domainNWFilterDriver = {
+ .instantiateFilter = nwfilterInstantiateFilter,
+ .teardownFilter = nwfilterTeardownFilter,
+};
+
+
int nwfilterRegister(void) {
virRegisterNWFilterDriver(&nwfilterDriver);
virRegisterStateDriver(&stateDriver);
+ virDomainConfNWFilterRegister(&domainNWFilterDriver);
return 0;
}
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