ueventd: allow using external firmware handlers
Userspace may want to load a different firmware than the one that the
kernel requests in some cases, therefore this change adds the ability
to ueventd to run an external handler that will determine the name of
the file that should actually be loaded.
Bug: 138352500
Test: unit tests
Change-Id: Ic5da37268fd78109f83ae52d1b903bf7322a5ee5
diff --git a/init/firmware_handler.h b/init/firmware_handler.h
index 3996096..b4138f1 100644
--- a/init/firmware_handler.h
+++ b/init/firmware_handler.h
@@ -14,32 +14,48 @@
* limitations under the License.
*/
-#ifndef _INIT_FIRMWARE_HANDLER_H
-#define _INIT_FIRMWARE_HANDLER_H
+#pragma once
+
+#include <pwd.h>
#include <string>
#include <vector>
+#include "result.h"
#include "uevent.h"
#include "uevent_handler.h"
namespace android {
namespace init {
+struct ExternalFirmwareHandler {
+ ExternalFirmwareHandler(std::string devpath, uid_t uid, std::string handler_path)
+ : devpath(std::move(devpath)), uid(uid), handler_path(std::move(handler_path)) {}
+ std::string devpath;
+ uid_t uid;
+ std::string handler_path;
+};
+
class FirmwareHandler : public UeventHandler {
public:
- explicit FirmwareHandler(std::vector<std::string> firmware_directories);
+ FirmwareHandler(std::vector<std::string> firmware_directories,
+ std::vector<ExternalFirmwareHandler> external_firmware_handlers);
virtual ~FirmwareHandler() = default;
void HandleUevent(const Uevent& uevent) override;
private:
- void ProcessFirmwareEvent(const Uevent& uevent);
+ friend void FirmwareTestWithExternalHandler(const std::string& test_name,
+ bool expect_new_firmware);
+
+ Result<std::string> RunExternalHandler(const std::string& handler, uid_t uid,
+ const Uevent& uevent) const;
+ std::string GetFirmwarePath(const Uevent& uevent) const;
+ void ProcessFirmwareEvent(const std::string& root, const std::string& firmware) const;
std::vector<std::string> firmware_directories_;
+ std::vector<ExternalFirmwareHandler> external_firmware_handlers_;
};
} // namespace init
} // namespace android
-
-#endif