[libvirt] [PATCH] [RFC] nwfilter: fix loadable module support
Stefan Berger
stefanb at linux.vnet.ibm.com
Mon Jun 14 11:49:50 UTC 2010
Hello!
I am trying to fix the loadable modules support by removing all direct
calls from qemu_driver.c and qemu_conf.c into nwfilter functions. The
below patch extends the nwfilter driver interface with 2 more private
functions to instantiate and tear down the filters. I call them
'private' because no client should ever be calling them via RPC and be
able to tear down the filters for example -- they should only ever be
callable from within libvirtd.
I extended the qemudShutdownVMDaemon function with the virConnectPtr
type of parameter so that I have the pointer to conn->nwfilterDriver to
access the private nwfilter driver functions. The problem with that is
that the conn pointer is not always available to be passed
(qemuReconnectDomain, qemuHandleMonitorEOF), particularly in tear-down
functions, and so I have to pass a NULL pointer, which then prevents the
calling of the private interface function to tear down the filters.Does
anyone have a suggestion on how I would best change the interface with
the nwfilter driver to fix this particular problem?
Stefan
Signed-off-by: Stefan Berger <stefanb at us.ibm.com>
---
src/esx/esx_nwfilter_driver.c | 10 ++++++++
src/nwfilter/nwfilter_driver.c | 15 ++++++++++++
src/nwfilter/nwfilter_gentech_driver.h | 26 ++++++++++++++++-----
src/qemu/qemu_conf.c | 10 ++++----
src/qemu/qemu_driver.c | 40
++++++++++++++++++---------------
5 files changed, 72 insertions(+), 29 deletions(-)
Index: libvirt-acl/src/nwfilter/nwfilter_driver.c
===================================================================
--- libvirt-acl.orig/src/nwfilter/nwfilter_driver.c
+++ libvirt-acl/src/nwfilter/nwfilter_driver.c
@@ -410,6 +410,19 @@ 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,
@@ -421,6 +434,8 @@ static virNWFilterDriver nwfilterDriver
.defineXML = nwfilterDefine,
.undefine = nwfilterUndefine,
.getXMLDesc = nwfilterDumpXML,
+ .privateInstantiateFilter = nwfilterInstantiateFilter,
+ .privateTeardownFilter = nwfilterTeardownFilter,
};
Index: libvirt-acl/src/esx/esx_nwfilter_driver.c
===================================================================
--- libvirt-acl.orig/src/esx/esx_nwfilter_driver.c
+++ libvirt-acl/src/esx/esx_nwfilter_driver.c
@@ -75,6 +75,8 @@ static virNWFilterDriver esxNWFilterDriv
NULL, /* defineXML */
NULL, /* undefine */
NULL, /* getXMLDesc */
+ NULL, /* privateInstantiateFilter */
+ NULL, /* privateTeardownFilter */
};
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
@@ -23,6 +23,8 @@
#ifndef __NWFILTER_GENTECH_DRIVER_H
# define __NWFILTER_GENTECH_DRIVER_H
+# include "datatypes.h"
+
virNWFilterTechDriverPtr virNWFilterTechDriverForName(const char *name);
int virNWFilterRuleInstAddData(virNWFilterRuleInstPtr res,
@@ -37,8 +39,18 @@ enum instCase {
};
+static inline
+int virNWFilterInstNWFilter(virConnectPtr conn,
+ const virDomainNetDefPtr net)
+{
+ if ((conn) && (conn->nwfilterDriver))
+ return conn->nwfilterDriver->privateInstantiateFilter(conn, net);
+ return 0;
+}
+
int virNWFilterInstantiateFilter(virConnectPtr conn,
const virDomainNetDefPtr net);
+
int virNWFilterUpdateInstantiateFilter(virConnectPtr conn,
const virDomainNetDefPtr net,
bool *skipIface);
@@ -70,18 +82,20 @@ void virNWFilterDomainFWUpdateCB(void *p
/* tear down an interface's filter before tearing down the interface */
static inline void
-virNWFilterTearNWFilter(virDomainNetDefPtr net) {
- if ((net->filter) && (net->ifname))
- virNWFilterTeardownFilter(net);
+virNWFilterTearNWFilter(virConnectPtr conn, virDomainNetDefPtr net) {
+ if ((conn) && (conn->nwfilterDriver) && (net->filter) && (net->ifname))
+ conn->nwfilterDriver->privateTeardownFilter(net);
}
static inline void
-virNWFilterTearVMNWFilters(virDomainObjPtr vm) {
+virNWFilterTearVMNWFilters(virConnectPtr conn, virDomainObjPtr vm) {
int i;
- for (i = 0; i < vm->def->nnets; i++)
- virNWFilterTearNWFilter(vm->def->nets[i]);
+ if (conn) {
+ for (i = 0; i < vm->def->nnets; i++)
+ virNWFilterTearNWFilter(conn, 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
@@ -1555,7 +1555,7 @@ qemudPhysIfaceConnect(virConnectPtr conn
if (rc >= 0) {
if ((net->filter) && (net->ifname)) {
- err = virNWFilterInstantiateFilter(conn, net);
+ err = virNWFilterInstNWFilter(conn, net);
if (err) {
close(rc);
rc = -1;
@@ -1688,7 +1688,7 @@ qemudNetworkIfaceConnect(virConnectPtr c
if (tapfd >= 0) {
if ((net->filter) && (net->ifname)) {
- err = virNWFilterInstantiateFilter(conn, net);
+ err = virNWFilterInstNWFilter(conn, net);
if (err) {
close(tapfd);
tapfd = -1;
@@ -4207,7 +4207,7 @@ int qemudBuildCommandLine(virConnectPtr
goto error;
if (VIR_REALLOC_N(*vmfds, (*nvmfds)+1) < 0) {
- virNWFilterTearNWFilter(net);
+ virNWFilterTearNWFilter(conn, net);
close(tapfd);
goto no_memory;
}
@@ -4226,7 +4226,7 @@ int qemudBuildCommandLine(virConnectPtr
goto error;
if (VIR_REALLOC_N(*vmfds, (*nvmfds)+1) < 0) {
- virNWFilterTearNWFilter(net);
+ virNWFilterTearNWFilter(conn, net);
close(tapfd);
goto no_memory;
}
@@ -4766,7 +4766,7 @@ int qemudBuildCommandLine(virConnectPtr
virReportOOMError();
error:
for (i = 0; i <= last_good_net; i++)
- virNWFilterTearNWFilter(def->nets[i]);
+ virNWFilterTearNWFilter(conn, def->nets[i]);
if (vmfds &&
*vmfds) {
for (i = 0; i < *nvmfds; i++)
Index: libvirt-acl/src/qemu/qemu_driver.c
===================================================================
--- libvirt-acl.orig/src/qemu/qemu_driver.c
+++ libvirt-acl/src/qemu/qemu_driver.c
@@ -158,7 +158,8 @@ static int qemudStartVMDaemon(virConnect
int stdin_fd,
const char *stdin_path);
-static void qemudShutdownVMDaemon(struct qemud_driver *driver,
+static void qemudShutdownVMDaemon(virConnectPtr conn,
+ struct qemud_driver *driver,
virDomainObjPtr vm,
int migrated);
@@ -735,7 +736,7 @@ qemuHandleMonitorEOF(qemuMonitorPtr mon
VIR_DOMAIN_EVENT_STOPPED_FAILED :
VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(NULL, driver, vm, 0);
if (!vm->persistent)
virDomainRemoveInactive(&driver->domains, vm);
else
@@ -1283,7 +1284,7 @@ error:
/* We can't get the monitor back, so must kill the VM
* to remove danger of it ending up running twice if
* user tries to start it again later */
- qemudShutdownVMDaemon(driver, obj, 0);
+ qemudShutdownVMDaemon(NULL, driver, obj, 0);
if (!obj->persistent)
virDomainRemoveInactive(&driver->domains, obj);
else
@@ -3576,7 +3577,7 @@ static int qemudStartVMDaemon(virConnect
VIR_FREE(progenv);
if (ret == -1) /* The VM failed to start; tear filters before taps */
- virNWFilterTearVMNWFilters(vm);
+ virNWFilterTearVMNWFilters(conn, vm);
if (vmfds) {
for (i = 0 ; i < nvmfds ; i++) {
@@ -3642,7 +3643,7 @@ cleanup:
/* We jump here if we failed to start the VM for any reason, or
* if we failed to initialize the now running VM. kill it off and
* pretend we never started it */
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(conn, driver, vm, 0);
if (logfile != -1)
close(logfile);
@@ -3651,7 +3652,8 @@ cleanup:
}
-static void qemudShutdownVMDaemon(struct qemud_driver *driver,
+static void qemudShutdownVMDaemon(virConnectPtr conn,
+ struct qemud_driver *driver,
virDomainObjPtr vm,
int migrated) {
int ret;
@@ -3668,7 +3670,7 @@ static void qemudShutdownVMDaemon(struct
* reporting so we don't squash a legit error. */
orig_err = virSaveLastError();
- virNWFilterTearVMNWFilters(vm);
+ virNWFilterTearVMNWFilters(conn, vm);
if (driver->macFilter) {
def = vm->def;
@@ -4465,7 +4467,7 @@ static int qemudDomainDestroy(virDomainP
goto endjob;
}
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(dom->conn, driver, vm, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
@@ -5211,7 +5213,7 @@ static int qemudDomainSaveFlag(virDomain
ret = 0;
/* Shut it down */
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(dom->conn, driver, vm, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SAVED);
@@ -5528,7 +5530,7 @@ static int qemudDomainCoreDump(virDomain
endjob:
if ((ret == 0) && (flags & VIR_DUMP_CRASH)) {
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(dom->conn, driver, vm, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_CRASHED);
@@ -7640,7 +7642,7 @@ cleanup:
VIR_WARN0("Unable to release PCI address on NIC");
if (ret != 0)
- virNWFilterTearNWFilter(net);
+ virNWFilterTearNWFilter(conn, net);
VIR_FREE(nicstr);
VIR_FREE(netstr);
@@ -8534,7 +8536,8 @@ cleanup:
}
static int
-qemudDomainDetachNetDevice(struct qemud_driver *driver,
+qemudDomainDetachNetDevice(virConnectPtr conn,
+ struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
unsigned long long qemuCmdFlags)
@@ -8609,7 +8612,7 @@ qemudDomainDetachNetDevice(struct qemud_
}
qemuDomainObjExitMonitorWithDriver(driver, vm);
- virNWFilterTearNWFilter(detach);
+ virNWFilterTearNWFilter(conn, detach);
#if WITH_MACVTAP
if (detach->type == VIR_DOMAIN_NET_TYPE_DIRECT) {
@@ -8921,7 +8924,8 @@ static int qemudDomainDetachDevice(virDo
_("This type of disk cannot be hot
unplugged"));
}
} else if (dev->type == VIR_DOMAIN_DEVICE_NET) {
- ret = qemudDomainDetachNetDevice(driver, vm, dev, qemuCmdFlags);
+ ret = qemudDomainDetachNetDevice(dom->conn, driver, vm, dev,
+ qemuCmdFlags);
} else if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER) {
if (dev->data.controller->type ==
VIR_DOMAIN_CONTROLLER_TYPE_SCSI) {
ret = qemudDomainDetachPciControllerDevice(driver, vm, dev,
@@ -10215,7 +10219,7 @@ qemudDomainMigratePrepareTunnel(virConne
qemust = qemuStreamMigOpen(st, unixfile);
if (qemust == NULL) {
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(dconn, driver, vm, 0);
if (!vm->persistent) {
if (qemuDomainObjEndJob(vm) > 0)
virDomainRemoveInactive(&driver->domains, vm);
@@ -10940,7 +10944,7 @@ qemudDomainMigratePerform (virDomainPtr
}
/* Clean up the source domain. */
- qemudShutdownVMDaemon(driver, vm, 1);
+ qemudShutdownVMDaemon(dom->conn, driver, vm, 1);
resume = 0;
event = virDomainEventNewFromObj(vm,
@@ -11100,7 +11104,7 @@ qemudDomainMigrateFinish2 (virConnectPtr
goto endjob;
}
} else {
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(dconn, driver, vm, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FAILED);
@@ -11946,7 +11950,7 @@ static int qemuDomainRevertToSnapshot(vi
*/
if (virDomainObjIsActive(vm)) {
- qemudShutdownVMDaemon(driver, vm, 0);
+ qemudShutdownVMDaemon(snapshot->domain->conn, driver, vm, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
Index: libvirt-acl/src/driver.h
===================================================================
--- libvirt-acl.orig/src/driver.h
+++ libvirt-acl/src/driver.h
@@ -1098,6 +1098,14 @@ typedef char *
(*virDrvNWFilterGetXMLDesc) (virNWFilterPtr pool,
unsigned int flags);
+# include "conf/domain_conf.h"
+
+typedef int
+ (*virDrvNWFilterInstantiateFilter) (virConnectPtr conn,
+ const virDomainNetDefPtr
net);
+
+typedef void
+ (*virDrvNWFilterTeardownFilter) (virDomainNetDefPtr net);
typedef struct _virNWFilterDriver virNWFilterDriver;
typedef virNWFilterDriver *virNWFilterDriverPtr;
@@ -1124,6 +1132,8 @@ struct _virNWFilterDriver {
virDrvNWFilterDefineXML defineXML;
virDrvNWFilterUndefine undefine;
virDrvNWFilterGetXMLDesc getXMLDesc;
+ virDrvNWFilterInstantiateFilter privateInstantiateFilter;
+ virDrvNWFilterTeardownFilter privateTeardownFilter;
};
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