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https://gitlab.com/libvirt/libvirt.git
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Add locking for thread safety to network driver
This commit is contained in:
Daniel P. Berrange
parent
b6dbbdc9fe
commit
bff6ac7b63
@ -1,3 +1,7 @@
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Thu Dec 4 21:38:41 GMT 2008 Daniel P. Berrange <berrange@redhat.com>
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* src/network_driver.c: Add locking for thread safety
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Thu Dec 4 21:37:41 GMT 2008 Daniel P. Berrange <berrange@redhat.com>
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* src/network_driver.c: Merge all return paths from driver APIs
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@ -59,6 +59,8 @@
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/* Main driver state */
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struct network_driver {
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PTHREAD_MUTEX_T(lock);
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virNetworkObjList networks;
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iptablesContext *iptables;
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@ -68,6 +70,16 @@ struct network_driver {
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char *logDir;
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};
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static void networkDriverLock(struct network_driver *driver)
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{
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pthread_mutex_lock(&driver->lock);
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}
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static void networkDriverUnlock(struct network_driver *driver)
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{
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pthread_mutex_unlock(&driver->lock);
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}
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static int networkShutdown(void);
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/* networkDebug statements should be changed to use this macro instead. */
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@ -95,6 +107,7 @@ networkAutostartConfigs(struct network_driver *driver) {
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unsigned int i;
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for (i = 0 ; i < driver->networks.count ; i++) {
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virNetworkObjLock(driver->networks.objs[i]);
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if (driver->networks.objs[i]->autostart &&
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!virNetworkIsActive(driver->networks.objs[i]) &&
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networkStartNetworkDaemon(NULL, driver, driver->networks.objs[i]) < 0) {
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@ -103,6 +116,7 @@ networkAutostartConfigs(struct network_driver *driver) {
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driver->networks.objs[i]->def->name,
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err ? err->message : NULL);
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}
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virNetworkObjUnlock(driver->networks.objs[i]);
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}
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}
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@ -120,6 +134,9 @@ networkStartup(void) {
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if (VIR_ALLOC(driverState) < 0)
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goto error;
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pthread_mutex_init(&driverState->lock, NULL);
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networkDriverLock(driverState);
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if (!uid) {
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if (asprintf(&driverState->logDir,
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"%s/log/libvirt/qemu", LOCAL_STATE_DIR) == -1)
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@ -165,6 +182,8 @@ networkStartup(void) {
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networkAutostartConfigs(driverState);
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networkDriverUnlock(driverState);
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return 0;
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out_of_memory:
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@ -172,6 +191,9 @@ out_of_memory:
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"%s", _("networkStartup: out of memory\n"));
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error:
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if (driverState)
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networkDriverUnlock(driverState);
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VIR_FREE(base);
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networkShutdown();
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return -1;
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@ -188,6 +210,7 @@ networkReload(void) {
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if (!driverState)
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return 0;
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networkDriverLock(driverState);
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virNetworkLoadAllConfigs(NULL,
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&driverState->networks,
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driverState->networkConfigDir,
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@ -200,7 +223,7 @@ networkReload(void) {
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}
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networkAutostartConfigs(driverState);
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networkDriverUnlock(driverState);
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return 0;
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}
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@ -220,12 +243,15 @@ networkActive(void) {
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if (!driverState)
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return 0;
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networkDriverLock(driverState);
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for (i = 0 ; i < driverState->networks.count ; i++) {
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virNetworkObjPtr net = driverState->networks.objs[i];
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virNetworkObjLock(net);
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if (virNetworkIsActive(net))
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active = 1;
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virNetworkObjUnlock(net);
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}
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networkDriverUnlock(driverState);
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return active;
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}
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@ -241,12 +267,16 @@ networkShutdown(void) {
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if (!driverState)
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return -1;
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networkDriverLock(driverState);
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/* shutdown active networks */
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for (i = 0 ; i < driverState->networks.count ; i++) {
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virNetworkObjPtr net = driverState->networks.objs[i];
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virNetworkObjLock(net);
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if (virNetworkIsActive(net))
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networkShutdownNetworkDaemon(NULL, driverState,
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driverState->networks.objs[i]);
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virNetworkObjUnlock(net);
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}
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/* free inactive networks */
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@ -261,6 +291,8 @@ networkShutdown(void) {
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if (driverState->iptables)
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iptablesContextFree(driverState->iptables);
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networkDriverUnlock(driverState);
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VIR_FREE(driverState);
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return 0;
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@ -801,10 +833,6 @@ static int networkShutdownNetworkDaemon(virConnectPtr conn ATTRIBUTE_UNUSED,
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network->newDef = NULL;
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}
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if (!network->configFile)
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virNetworkRemoveInactive(&driver->networks,
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network);
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return 0;
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}
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@ -815,7 +843,9 @@ static virNetworkPtr networkLookupByUUID(virConnectPtr conn,
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virNetworkObjPtr network;
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virNetworkPtr ret = NULL;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(conn, NULL, NULL, VIR_ERR_NO_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -825,6 +855,8 @@ static virNetworkPtr networkLookupByUUID(virConnectPtr conn,
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ret = virGetNetwork(conn, network->def->name, network->def->uuid);
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -834,7 +866,9 @@ static virNetworkPtr networkLookupByName(virConnectPtr conn,
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virNetworkObjPtr network;
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virNetworkPtr ret = NULL;
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networkDriverLock(driver);
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network = virNetworkFindByName(&driver->networks, name);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(conn, NULL, NULL, VIR_ERR_NO_NETWORK,
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"%s", _("no network with matching name"));
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@ -844,6 +878,8 @@ static virNetworkPtr networkLookupByName(virConnectPtr conn,
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ret = virGetNetwork(conn, network->def->name, network->def->uuid);
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -866,9 +902,14 @@ static int networkNumNetworks(virConnectPtr conn) {
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int nactive = 0, i;
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struct network_driver *driver = conn->networkPrivateData;
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for (i = 0 ; i < driver->networks.count ; i++)
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networkDriverLock(driver);
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for (i = 0 ; i < driver->networks.count ; i++) {
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virNetworkObjLock(driver->networks.objs[i]);
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if (virNetworkIsActive(driver->networks.objs[i]))
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nactive++;
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virNetworkObjUnlock(driver->networks.objs[i]);
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}
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networkDriverUnlock(driver);
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return nactive;
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}
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@ -877,19 +918,26 @@ static int networkListNetworks(virConnectPtr conn, char **const names, int nname
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struct network_driver *driver = conn->networkPrivateData;
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int got = 0, i;
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networkDriverLock(driver);
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for (i = 0 ; i < driver->networks.count && got < nnames ; i++) {
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virNetworkObjLock(driver->networks.objs[i]);
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if (virNetworkIsActive(driver->networks.objs[i])) {
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if (!(names[got] = strdup(driver->networks.objs[i]->def->name))) {
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virNetworkObjUnlock(driver->networks.objs[i]);
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networkReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY,
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"%s", _("failed to allocate space for VM name string"));
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goto cleanup;
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}
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got++;
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}
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virNetworkObjUnlock(driver->networks.objs[i]);
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}
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networkDriverUnlock(driver);
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return got;
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cleanup:
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networkDriverUnlock(driver);
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for (i = 0 ; i < got ; i++)
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VIR_FREE(names[i]);
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return -1;
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@ -899,9 +947,14 @@ static int networkNumDefinedNetworks(virConnectPtr conn) {
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int ninactive = 0, i;
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struct network_driver *driver = conn->networkPrivateData;
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for (i = 0 ; i < driver->networks.count ; i++)
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networkDriverLock(driver);
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for (i = 0 ; i < driver->networks.count ; i++) {
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virNetworkObjLock(driver->networks.objs[i]);
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if (!virNetworkIsActive(driver->networks.objs[i]))
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ninactive++;
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virNetworkObjUnlock(driver->networks.objs[i]);
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}
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networkDriverUnlock(driver);
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return ninactive;
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}
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@ -910,19 +963,25 @@ static int networkListDefinedNetworks(virConnectPtr conn, char **const names, in
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struct network_driver *driver = conn->networkPrivateData;
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int got = 0, i;
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networkDriverLock(driver);
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for (i = 0 ; i < driver->networks.count && got < nnames ; i++) {
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virNetworkObjLock(driver->networks.objs[i]);
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if (!virNetworkIsActive(driver->networks.objs[i])) {
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if (!(names[got] = strdup(driver->networks.objs[i]->def->name))) {
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virNetworkObjUnlock(driver->networks.objs[i]);
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networkReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY,
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"%s", _("failed to allocate space for VM name string"));
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goto cleanup;
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}
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got++;
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}
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virNetworkObjUnlock(driver->networks.objs[i]);
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}
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networkDriverUnlock(driver);
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return got;
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cleanup:
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networkDriverUnlock(driver);
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for (i = 0 ; i < got ; i++)
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VIR_FREE(names[i]);
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return -1;
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@ -931,9 +990,11 @@ static int networkListDefinedNetworks(virConnectPtr conn, char **const names, in
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static virNetworkPtr networkCreate(virConnectPtr conn, const char *xml) {
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struct network_driver *driver = conn->networkPrivateData;
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virNetworkDefPtr def;
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virNetworkObjPtr network;
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virNetworkObjPtr network = NULL;
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virNetworkPtr ret = NULL;
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networkDriverLock(driver);
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if (!(def = virNetworkDefParseString(conn, xml)))
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goto cleanup;
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@ -946,6 +1007,7 @@ static virNetworkPtr networkCreate(virConnectPtr conn, const char *xml) {
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if (networkStartNetworkDaemon(conn, driver, network) < 0) {
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virNetworkRemoveInactive(&driver->networks,
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network);
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network = NULL;
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goto cleanup;
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}
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@ -953,15 +1015,20 @@ static virNetworkPtr networkCreate(virConnectPtr conn, const char *xml) {
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cleanup:
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virNetworkDefFree(def);
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if (network)
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virNetworkObjUnlock(network);
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networkDriverUnlock(driver);
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return ret;
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}
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static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
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struct network_driver *driver = conn->networkPrivateData;
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virNetworkDefPtr def;
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virNetworkObjPtr network;
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virNetworkObjPtr network = NULL;
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virNetworkPtr ret = NULL;
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networkDriverLock(driver);
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if (!(def = virNetworkDefParseString(conn, xml)))
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goto cleanup;
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@ -977,6 +1044,7 @@ static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
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network) < 0) {
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virNetworkRemoveInactive(&driver->networks,
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network);
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network = NULL;
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goto cleanup;
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}
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@ -984,14 +1052,19 @@ static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
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cleanup:
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virNetworkDefFree(def);
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if (network)
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virNetworkObjUnlock(network);
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networkDriverUnlock(driver);
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return ret;
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}
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static int networkUndefine(virNetworkPtr net) {
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struct network_driver *driver = net->conn->networkPrivateData;
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virNetworkObjPtr network;
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virNetworkObjPtr network = NULL;
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int ret = -1;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_DOMAIN,
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@ -1010,9 +1083,13 @@ static int networkUndefine(virNetworkPtr net) {
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virNetworkRemoveInactive(&driver->networks,
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network);
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network = NULL;
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ret = 0;
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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networkDriverUnlock(driver);
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return ret;
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}
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@ -1021,7 +1098,10 @@ static int networkStart(virNetworkPtr net) {
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virNetworkObjPtr network;
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int ret = -1;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -1031,6 +1111,8 @@ static int networkStart(virNetworkPtr net) {
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ret = networkStartNetworkDaemon(net->conn, driver, network);
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -1039,7 +1121,10 @@ static int networkDestroy(virNetworkPtr net) {
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virNetworkObjPtr network;
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int ret = -1;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -1047,8 +1132,15 @@ static int networkDestroy(virNetworkPtr net) {
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}
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ret = networkShutdownNetworkDaemon(net->conn, driver, network);
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if (!network->configFile) {
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virNetworkRemoveInactive(&driver->networks,
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network);
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network = NULL;
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}
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -1057,7 +1149,10 @@ static char *networkDumpXML(virNetworkPtr net, int flags ATTRIBUTE_UNUSED) {
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virNetworkObjPtr network;
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char *ret = NULL;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -1067,6 +1162,8 @@ static char *networkDumpXML(virNetworkPtr net, int flags ATTRIBUTE_UNUSED) {
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ret = virNetworkDefFormat(net->conn, network->def);
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -1075,7 +1172,10 @@ static char *networkGetBridgeName(virNetworkPtr net) {
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virNetworkObjPtr network;
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char *bridge = NULL;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching id"));
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@ -1088,6 +1188,8 @@ static char *networkGetBridgeName(virNetworkPtr net) {
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"%s", _("failed to allocate space for network bridge string"));
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return bridge;
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}
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@ -1097,7 +1199,9 @@ static int networkGetAutostart(virNetworkPtr net,
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virNetworkObjPtr network;
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int ret = -1;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -1108,6 +1212,8 @@ static int networkGetAutostart(virNetworkPtr net,
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ret = 0;
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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@ -1117,7 +1223,10 @@ static int networkSetAutostart(virNetworkPtr net,
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virNetworkObjPtr network;
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int ret = -1;
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networkDriverLock(driver);
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network = virNetworkFindByUUID(&driver->networks, net->uuid);
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networkDriverUnlock(driver);
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if (!network) {
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networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
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"%s", _("no network with matching uuid"));
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@ -1157,6 +1266,8 @@ static int networkSetAutostart(virNetworkPtr net,
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ret = 0;
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cleanup:
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if (network)
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virNetworkObjUnlock(network);
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return ret;
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}
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