IOReturn IOCatalogue::terminateDriversForModule(
OSString * moduleName,
bool unload)
{
IOReturn ret;
OSDictionary * dict;
bool isLoaded = false;
/* Check first if the kext currently has any linkage dependents;
* in such a case the unload would fail so let's not terminate any
* IOServices (since doing so typically results in a panic when there
* are loaded dependencies). Note that we aren't locking the kext here
* so it might lose or gain dependents by the time we call unloadModule();
* I think that's ok, our unload can fail if a kext comes in on top of
* this one even after we've torn down IOService objects. Conversely,
* if we fail the unload here and then lose a library, the autounload
* thread will get us in short order.
*/
if (OSKext::isKextWithIdentifierLoaded(moduleName->getCStringNoCopy())) {
isLoaded = true;
if (!OSKext::canUnloadKextWithIdentifier(moduleName,
/* checkClasses */ false)) {
ret = kOSKextReturnInUse;
goto finish;
}
}
dict = OSDictionary::withCapacity(1);
if (!dict) {
ret = kIOReturnNoMemory;
goto finish;
}
dict->setObject(gIOModuleIdentifierKey, moduleName);
ret = _terminateDrivers(dict);
/* No goto between IOLock calls!
*/
IOLockLock(lock);
if (kIOReturnSuccess == ret) {
ret = _removeDrivers(array, dict);
}
kernelTables->reset();
// Unload the module itself.
if (unload && isLoaded && ret == kIOReturnSuccess) {
ret = unloadModule(moduleName);
}
IOLockUnlock(lock);
dict->release();
finish:
return ret;
}
IOReturn IOCatalogue::terminateDrivers(OSDictionary * matching)
{
IOReturn ret;
ret = _terminateDrivers(matching);
IORWLockWrite(lock);
if (kIOReturnSuccess == ret)
ret = _removeDrivers(matching);
IORWLockUnlock(lock);
return ret;
}
IOReturn IOCatalogue::terminateDrivers(OSDictionary * matching)
{
IOReturn ret;
ret = _terminateDrivers(matching);
IOLockLock(lock);
if (kIOReturnSuccess == ret)
ret = _removeDrivers(array, matching);
kernelTables->reset();
IOLockUnlock(lock);
return ret;
}