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nwfilter_driver: Use automatic mutex management

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Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Tim Wiederhake 2022-03-08 10:54:23 +01:00
parent 183804c043
commit d115fe8d11
1 changed files with 40 additions and 54 deletions
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94
src/nwfilter/nwfilter_driver.c
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@ -57,15 +57,6 @@ static int nwfilterStateReload(void);
static virMutex driverMutex = VIR_MUTEX_INITIALIZER;
static void nwfilterDriverLock(void)
{
virMutexLock(&driverMutex);
}
static void nwfilterDriverUnlock(void)
{
virMutexUnlock(&driverMutex);
}
#ifdef WITH_FIREWALLD
static void
@ -204,6 +195,7 @@ nwfilterStateInitialize(bool privileged,
virStateInhibitCallback callback G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
VIR_LOCK_GUARD lock = virLockGuardLock(&driverMutex);
GDBusConnection *sysbus = NULL;
if (root != NULL) {
@ -230,8 +222,6 @@ nwfilterStateInitialize(bool privileged,
if (!privileged)
return VIR_DRV_STATE_INIT_SKIPPED;
nwfilterDriverLock();
driver->stateDir = g_strdup(RUNSTATEDIR "/libvirt/nwfilter");
if (g_mkdir_with_parents(driver->stateDir, S_IRWXU) < 0) {
@ -290,13 +280,10 @@ nwfilterStateInitialize(bool privileged,
if (virNWFilterBuildAll(driver, false) < 0)
goto error;
nwfilterDriverUnlock();
return VIR_DRV_STATE_INIT_COMPLETE;
error:
nwfilterDriverUnlock();
nwfilterStateCleanup();
nwfilterStateCleanupLocked();
return VIR_DRV_STATE_INIT_ERROR;
@ -335,16 +322,15 @@ nwfilterStateReload(void)
/* shut down all threads -- they will be restarted if necessary */
virNWFilterLearnThreadsTerminate(true);
nwfilterDriverLock();
virNWFilterWriteLockFilterUpdates();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
virNWFilterWriteLockFilterUpdates();
virNWFilterObjListLoadAllConfigs(driver->nwfilters, driver->configDir);
virNWFilterObjListLoadAllConfigs(driver->nwfilters, driver->configDir);
virNWFilterUnlockFilterUpdates();
virNWFilterUnlockFilterUpdates();
virNWFilterBuildAll(driver, false);
nwfilterDriverUnlock();
virNWFilterBuildAll(driver, false);
}
return 0;
}
@ -422,13 +408,13 @@ static virNWFilterPtr
nwfilterLookupByUUID(virConnectPtr conn,
const unsigned char *uuid)
{
virNWFilterObj *obj;
virNWFilterObj *obj = NULL;
virNWFilterDef *def;
virNWFilterPtr nwfilter = NULL;
nwfilterDriverLock();
obj = nwfilterObjFromNWFilter(uuid);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
obj = nwfilterObjFromNWFilter(uuid);
}
if (!obj)
return NULL;
@ -449,13 +435,13 @@ static virNWFilterPtr
nwfilterLookupByName(virConnectPtr conn,
const char *name)
{
virNWFilterObj *obj;
virNWFilterObj *obj = NULL;
virNWFilterDef *def;
virNWFilterPtr nwfilter = NULL;
nwfilterDriverLock();
obj = virNWFilterObjListFindByName(driver->nwfilters, name);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
obj = virNWFilterObjListFindByName(driver->nwfilters, name);
}
if (!obj) {
virReportError(VIR_ERR_NO_NWFILTER,
@ -478,14 +464,15 @@ nwfilterLookupByName(virConnectPtr conn,
static int
nwfilterConnectNumOfNWFilters(virConnectPtr conn)
{
int ret;
int ret = -1;
if (virConnectNumOfNWFiltersEnsureACL(conn) < 0)
return -1;
nwfilterDriverLock();
ret = virNWFilterObjListNumOfNWFilters(driver->nwfilters, conn,
virConnectNumOfNWFiltersCheckACL);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
ret = virNWFilterObjListNumOfNWFilters(driver->nwfilters, conn,
virConnectNumOfNWFiltersCheckACL);
}
return ret;
}
@ -495,16 +482,17 @@ nwfilterConnectListNWFilters(virConnectPtr conn,
char **const names,
int maxnames)
{
int nnames;
int nnames = -1;
if (virConnectListNWFiltersEnsureACL(conn) < 0)
return -1;
nwfilterDriverLock();
nnames = virNWFilterObjListGetNames(driver->nwfilters, conn,
virConnectListNWFiltersCheckACL,
names, maxnames);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
nnames = virNWFilterObjListGetNames(driver->nwfilters, conn,
virConnectListNWFiltersCheckACL,
names, maxnames);
}
return nnames;
}
@ -514,17 +502,17 @@ nwfilterConnectListAllNWFilters(virConnectPtr conn,
virNWFilterPtr **nwfilters,
unsigned int flags)
{
int ret;
int ret = -1;
virCheckFlags(0, -1);
if (virConnectListAllNWFiltersEnsureACL(conn) < 0)
return -1;
nwfilterDriverLock();
ret = virNWFilterObjListExport(conn, driver->nwfilters, nwfilters,
virConnectListAllNWFiltersCheckACL);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
ret = virNWFilterObjListExport(conn, driver->nwfilters, nwfilters,
virConnectListAllNWFiltersCheckACL);
}
return ret;
}
@ -535,6 +523,7 @@ nwfilterDefineXMLFlags(virConnectPtr conn,
const char *xml,
unsigned int flags)
{
VIR_LOCK_GUARD lock = virLockGuardLock(&driverMutex);
virNWFilterDef *def;
virNWFilterObj *obj = NULL;
virNWFilterDef *objdef;
@ -549,7 +538,6 @@ nwfilterDefineXMLFlags(virConnectPtr conn,
return NULL;
}
nwfilterDriverLock();
virNWFilterWriteLockFilterUpdates();
if (!(def = virNWFilterDefParseString(xml, flags)))
@ -576,7 +564,6 @@ nwfilterDefineXMLFlags(virConnectPtr conn,
virNWFilterObjUnlock(obj);
virNWFilterUnlockFilterUpdates();
nwfilterDriverUnlock();
return nwfilter;
}
@ -592,11 +579,11 @@ nwfilterDefineXML(virConnectPtr conn,
static int
nwfilterUndefine(virNWFilterPtr nwfilter)
{
VIR_LOCK_GUARD lock = virLockGuardLock(&driverMutex);
virNWFilterObj *obj;
virNWFilterDef *def;
int ret = -1;
nwfilterDriverLock();
virNWFilterWriteLockFilterUpdates();
if (!(obj = nwfilterObjFromNWFilter(nwfilter->uuid)))
@ -625,7 +612,6 @@ nwfilterUndefine(virNWFilterPtr nwfilter)
virNWFilterObjUnlock(obj);
virNWFilterUnlockFilterUpdates();
nwfilterDriverUnlock();
return ret;
}
@ -634,15 +620,15 @@ static char *
nwfilterGetXMLDesc(virNWFilterPtr nwfilter,
unsigned int flags)
{
virNWFilterObj *obj;
virNWFilterObj *obj = NULL;
virNWFilterDef *def;
char *ret = NULL;
virCheckFlags(0, NULL);
nwfilterDriverLock();
obj = nwfilterObjFromNWFilter(nwfilter->uuid);
nwfilterDriverUnlock();
VIR_WITH_MUTEX_LOCK_GUARD(&driverMutex) {
obj = nwfilterObjFromNWFilter(nwfilter->uuid);
}
if (!obj)
return NULL;