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nodedev: Alter node device deletion logic

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Alter the node device deletion logic to make use of the parent field
from the obj->def rather than call virNodeDeviceObjListGetParentHost.
As it turns out the saved @def won't have parent_wwnn/wwpn or
parent_fabric_wwn, so the only logical path would be to call
virNodeDeviceObjListGetParentHostByParent which we can accomplish
directly via virNodeDeviceObjListFindByName.
This commit is contained in:
John Ferlan 2017-07-20 09:07:52 -04:00
parent 4860582f67
commit 5ba2ce658b
2 changed files with 32 additions and 20 deletions
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26
src/node_device/node_device_driver.c
View File

@ -594,8 +594,9 @@ nodeDeviceDestroy(virNodeDevicePtr device)
int ret = -1;
virNodeDeviceObjPtr obj = NULL;
virNodeDeviceDefPtr def;
char *parent = NULL;
char *wwnn = NULL, *wwpn = NULL;
int parent_host = -1;
unsigned int parent_host;
if (!(obj = nodeDeviceObjFindByName(device->name)))
return -1;
@ -609,13 +610,23 @@ nodeDeviceDestroy(virNodeDevicePtr device)
if (virNodeDeviceGetWWNs(def, &wwnn, &wwpn) < 0)
goto cleanup;
/* virNodeDeviceGetParentHost will cause the device object's lock
* to be taken, so grab the object def which will have the various
* fields used to search (name, parent, parent_wwnn, parent_wwpn,
* or parent_fabric_wwn) and drop the object lock. */
/* Because we're about to release the lock and thus run into a race
* possibility (however improbable) with a udevAddOneDevice change
* event which would essentially free the existing @def (obj->def) and
* replace it with something new, we need to grab the parent field
* and then find the parent obj in order to manage the vport */
if (VIR_STRDUP(parent, def->parent) < 0)
goto cleanup;
virNodeDeviceObjEndAPI(&obj);
if ((parent_host = virNodeDeviceObjListGetParentHost(driver->devs, def,
EXISTING_DEVICE)) < 0)
if (!(obj = virNodeDeviceObjListFindByName(driver->devs, parent))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find parent '%s' definition"), parent);
goto cleanup;
}
if (virSCSIHostGetNumber(parent, &parent_host) < 0)
goto cleanup;
if (virVHBAManageVport(parent_host, wwpn, wwnn, VPORT_DELETE) < 0)
@ -626,6 +637,7 @@ nodeDeviceDestroy(virNodeDevicePtr device)
cleanup:
nodeDeviceUnlock();
virNodeDeviceObjEndAPI(&obj);
VIR_FREE(parent);
VIR_FREE(wwnn);
VIR_FREE(wwpn);
return ret;

26
src/test/test_driver.c
View File

@ -5515,8 +5515,9 @@ testNodeDeviceDestroy(virNodeDevicePtr dev)
int ret = 0;
testDriverPtr driver = dev->conn->privateData;
virNodeDeviceObjPtr obj = NULL;
virNodeDeviceObjPtr parentobj = NULL;
virNodeDeviceDefPtr def;
char *parent_name = NULL, *wwnn = NULL, *wwpn = NULL;
char *wwnn = NULL, *wwpn = NULL;
virObjectEventPtr event = NULL;
if (!(obj = testNodeDeviceObjFindByName(driver, dev->name)))
@ -5526,22 +5527,22 @@ testNodeDeviceDestroy(virNodeDevicePtr dev)
if (virNodeDeviceGetWWNs(def, &wwnn, &wwpn) == -1)
goto cleanup;
if (VIR_STRDUP(parent_name, def->parent) < 0)
goto cleanup;
/* virNodeDeviceGetParentHost will cause the device object's lock to be
* taken, so we have to dup the parent's name and drop the lock
* before calling it. We don't need the reference to the object
* any more once we have the parent's name. */
/* Unlike the real code we cannot run into the udevAddOneDevice race
* which would replace obj->def, so no need to save off the parent,
* but do need to drop the @obj lock so that the FindByName code doesn't
* deadlock on ourselves */
virObjectUnlock(obj);
/* We do this just for basic validation, but also avoid finding a
* vport capable HBA if for some reason our vHBA doesn't exist */
if (virNodeDeviceObjListGetParentHost(driver->devs, def,
EXISTING_DEVICE) < 0) {
/* We do this just for basic validation and throw away the parentobj
* since there's no vport_delete to be run */
if (!(parentobj = virNodeDeviceObjListFindByName(driver->devs,
def->parent))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find parent '%s' definition"), def->parent);
virObjectLock(obj);
goto cleanup;
}
virNodeDeviceObjEndAPI(&parentobj);
event = virNodeDeviceEventLifecycleNew(dev->name,
VIR_NODE_DEVICE_EVENT_DELETED,
@ -5555,7 +5556,6 @@ testNodeDeviceDestroy(virNodeDevicePtr dev)
cleanup:
virNodeDeviceObjEndAPI(&obj);
testObjectEventQueue(driver, event);
VIR_FREE(parent_name);
VIR_FREE(wwnn);
VIR_FREE(wwpn);
return ret;