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Fix misc locking bugs identified by lock checker

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This commit is contained in:
Daniel P. Berrange 2009-05-19 11:06:25 +00:00
parent 6962a2dd7e
commit de658ab4e4
6 changed files with 50 additions and 32 deletions
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20
ChangeLog
View File

@ -1,3 +1,23 @@
Tue May 19 12:04:22 BST 2009 Daniel P. Berrange <berrange@redhat.com>
Fix misc locking bugs identified by lock checker
* src/test.c: Add missing driver lock calls in testOpen()
* src/uml_driver.c: Remove bogus driver unlock call in
umlDomainStart. Ensure driver lock is held for the duration
of umlDomainSetAutostart.
* src/network_driver.c: Ensure driver lock is held for the
duration of networkStart, networkDestroy and networkSetAutostart
* src/storage_driver.c: Ensure driver lock is held for the
duration of storagePoolRefresh, and storagePoolSetAutostart.
Ensure driver is locked before re-obtaining pool lock in
storageVolumeCreateXML.
* src/qemu_driver.c: Ensure lock is held when removing domain
event callbacks in qemudClose(). Drop driver lock before calling
qemudAutostartConfigs, since that will obtain a lock when calling
virConnectClose. Hold lock across duration of suspend, resume,
start, get security label, device attach and device detach
operations.
Tue May 19 11:10:22 BST 2009 Daniel P. Berrange <berrange@redhat.com>
Add an optional OCaml+CIL mutex lock checker

6
src/network_driver.c
View File

@ -1217,7 +1217,6 @@ static int networkStart(virNetworkPtr net) {
networkDriverLock(driver);
network = virNetworkFindByUUID(&driver->networks, net->uuid);
networkDriverUnlock(driver);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
@ -1230,6 +1229,7 @@ static int networkStart(virNetworkPtr net) {
cleanup:
if (network)
virNetworkObjUnlock(network);
networkDriverUnlock(driver);
return ret;
}
@ -1240,7 +1240,6 @@ static int networkDestroy(virNetworkPtr net) {
networkDriverLock(driver);
network = virNetworkFindByUUID(&driver->networks, net->uuid);
networkDriverUnlock(driver);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
@ -1258,6 +1257,7 @@ static int networkDestroy(virNetworkPtr net) {
cleanup:
if (network)
virNetworkObjUnlock(network);
networkDriverUnlock(driver);
return ret;
}
@ -1349,7 +1349,6 @@ static int networkSetAutostart(virNetworkPtr net,
networkDriverLock(driver);
network = virNetworkFindByUUID(&driver->networks, net->uuid);
networkDriverUnlock(driver);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
@ -1399,6 +1398,7 @@ cleanup:
VIR_FREE(autostartLink);
if (network)
virNetworkObjUnlock(network);
networkDriverUnlock(driver);
return ret;
}

42
src/qemu_driver.c
View File

@ -215,6 +215,7 @@ qemudAutostartConfigs(struct qemud_driver *driver) {
"qemu:///system");
/* Ignoring NULL conn which is mostly harmless here */
qemuDriverLock(driver);
for (i = 0 ; i < driver->domains.count ; i++) {
virDomainObjPtr vm = driver->domains.objs[i];
virDomainObjLock(vm);
@ -237,6 +238,7 @@ qemudAutostartConfigs(struct qemud_driver *driver) {
}
virDomainObjUnlock(vm);
}
qemuDriverUnlock(driver);
if (conn)
virConnectClose(conn);
@ -519,9 +521,10 @@ qemudStartup(void) {
NULL, NULL) < 0)
goto error;
qemudReconnectVMs(qemu_driver);
qemuDriverUnlock(qemu_driver);
qemudAutostartConfigs(qemu_driver);
qemuDriverUnlock(qemu_driver);
return 0;
@ -567,9 +570,9 @@ qemudReload(void) {
qemu_driver->configDir,
qemu_driver->autostartDir,
qemudNotifyLoadDomain, qemu_driver);
qemuDriverUnlock(qemu_driver);
qemudAutostartConfigs(qemu_driver);
qemuDriverUnlock(qemu_driver);
return 0;
}
@ -1812,7 +1815,9 @@ static int qemudClose(virConnectPtr conn) {
struct qemud_driver *driver = conn->privateData;
/* Get rid of callbacks registered for this conn */
qemuDriverLock(driver);
virDomainEventCallbackListRemoveConn(conn, driver->domainEventCallbacks);
qemuDriverUnlock(driver);
conn->privateData = NULL;
@ -2229,7 +2234,6 @@ static int qemudDomainSuspend(virDomainPtr dom) {
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -2264,11 +2268,9 @@ cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event) {
qemuDriverLock(driver);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
}
qemuDriverUnlock(driver);
return ret;
}
@ -2282,7 +2284,6 @@ static int qemudDomainResume(virDomainPtr dom) {
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -2316,11 +2317,9 @@ static int qemudDomainResume(virDomainPtr dom) {
cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event) {
qemuDriverLock(driver);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
}
qemuDriverUnlock(driver);
return ret;
}
@ -3153,7 +3152,6 @@ static int qemudDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr sec
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -3199,6 +3197,7 @@ static int qemudDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr sec
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
@ -3473,7 +3472,6 @@ static int qemudDomainStart(virDomainPtr dom) {
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -3492,11 +3490,9 @@ static int qemudDomainStart(virDomainPtr dom) {
cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event) {
qemuDriverLock(driver);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
}
qemuDriverUnlock(driver);
return ret;
}
@ -3984,7 +3980,6 @@ static int qemudDomainAttachDevice(virDomainPtr dom,
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
qemuDriverUnlock(driver);
virUUIDFormat(dom->uuid, uuidstr);
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
@ -3992,7 +3987,6 @@ static int qemudDomainAttachDevice(virDomainPtr dom,
}
if (!virDomainIsActive(vm)) {
qemuDriverUnlock(driver);
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID,
"%s", _("cannot attach device on inactive domain"));
goto cleanup;
@ -4000,7 +3994,6 @@ static int qemudDomainAttachDevice(virDomainPtr dom,
dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml,
VIR_DOMAIN_XML_INACTIVE);
qemuDriverUnlock(driver);
if (dev == NULL)
goto cleanup;
@ -4053,6 +4046,7 @@ cleanup:
virDomainDeviceDefFree(dev);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
@ -4136,7 +4130,6 @@ static int qemudDomainDetachDevice(virDomainPtr dom,
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
qemuDriverUnlock(driver);
virUUIDFormat(dom->uuid, uuidstr);
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
@ -4144,7 +4137,6 @@ static int qemudDomainDetachDevice(virDomainPtr dom,
}
if (!virDomainIsActive(vm)) {
qemuDriverUnlock(driver);
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID,
"%s", _("cannot detach device on inactive domain"));
goto cleanup;
@ -4152,7 +4144,6 @@ static int qemudDomainDetachDevice(virDomainPtr dom,
dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml,
VIR_DOMAIN_XML_INACTIVE);
qemuDriverUnlock(driver);
if (dev == NULL)
goto cleanup;
@ -4176,6 +4167,7 @@ cleanup:
virDomainDeviceDefFree(dev);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
@ -4215,7 +4207,6 @@ static int qemudDomainSetAutostart(virDomainPtr dom,
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -4273,6 +4264,7 @@ cleanup:
VIR_FREE(autostartLink);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}

7
src/storage_driver.c
View File

@ -792,7 +792,6 @@ storagePoolRefresh(virStoragePoolPtr obj,
storageDriverLock(driver);
pool = virStoragePoolObjFindByUUID(&driver->pools, obj->uuid);
storageDriverUnlock(driver);
if (!pool) {
virStorageReportError(obj->conn, VIR_ERR_INVALID_STORAGE_POOL,
@ -834,6 +833,7 @@ storagePoolRefresh(virStoragePoolPtr obj,
cleanup:
if (pool)
virStoragePoolObjUnlock(pool);
storageDriverUnlock(driver);
return ret;
}
@ -939,7 +939,6 @@ storagePoolSetAutostart(virStoragePoolPtr obj,
storageDriverLock(driver);
pool = virStoragePoolObjFindByUUID(&driver->pools, obj->uuid);
storageDriverUnlock(driver);
if (!pool) {
virStorageReportError(obj->conn, VIR_ERR_INVALID_STORAGE_POOL,
@ -988,6 +987,7 @@ storagePoolSetAutostart(virStoragePoolPtr obj,
cleanup:
if (pool)
virStoragePoolObjUnlock(pool);
storageDriverUnlock(driver);
return ret;
}
@ -1274,7 +1274,10 @@ storageVolumeCreateXML(virStoragePoolPtr obj,
buildret = backend->buildVol(obj->conn, buildvoldef);
storageDriverLock(driver);
virStoragePoolObjLock(pool);
storageDriverUnlock(driver);
voldef->building = 0;
pool->asyncjobs--;

3
src/test.c
View File

@ -659,10 +659,12 @@ static virDrvOpenStatus testOpen(virConnectPtr conn,
if (ret == VIR_DRV_OPEN_SUCCESS) {
testConnPtr privconn = conn->privateData;
testDriverLock(privconn);
/* Init callback list */
if (VIR_ALLOC(privconn->domainEventCallbacks) < 0 ||
!(privconn->domainEventQueue = virDomainEventQueueNew())) {
virReportOOMError(NULL);
testDriverUnlock(privconn);
testClose(conn);
return VIR_DRV_OPEN_ERROR;
}
@ -671,6 +673,7 @@ static virDrvOpenStatus testOpen(virConnectPtr conn,
virEventAddTimeout(-1, testDomainEventFlush, privconn, NULL)) < 0)
DEBUG0("virEventAddTimeout failed: No addTimeoutImpl defined. "
"continuing without events.");
testDriverUnlock(privconn);
}
return (ret);

4
src/uml_driver.c
View File

@ -1553,7 +1553,6 @@ static int umlDomainStart(virDomainPtr dom) {
umlDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
umlReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN,
@ -1672,6 +1671,7 @@ static int umlDomainGetAutostart(virDomainPtr dom,
cleanup:
if (vm)
virDomainObjUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
@ -1684,7 +1684,6 @@ static int umlDomainSetAutostart(virDomainPtr dom,
umlDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
umlReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN,
@ -1740,6 +1739,7 @@ cleanup:
VIR_FREE(autostartLink);
if (vm)
virDomainObjUnlock(vm);
umlDriverUnlock(driver);
return ret;
}