efi_selftest: unit test for RegisterProtocolNotify()

Provide a unit test for the RegisterProtocolNotify() boot service.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

lib/efi_selftest/Makefile

@@ -27,6 +27,7 @@ efi_selftest_gop.o \
 efi_selftest_loaded_image.o \
 efi_selftest_manageprotocols.o \
 efi_selftest_memory.o \
+efi_selftest_register_notify.o \
 efi_selftest_rtc.o \
 efi_selftest_snp.o \
 efi_selftest_textinput.o \

lib/efi_selftest/efi_selftest_register_notify.c

@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_register_notify
+ *
+ * Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * This unit test checks the following protocol services:
+ * InstallProtocolInterface, UninstallProtocolInterface,
+ * RegisterProtocolNotify, CreateEvent, CloseEvent.
+ */
+
+#include <efi_selftest.h>
+
+/*
+ * The test currently does not actually call the interface function.
+ * So this is just a dummy structure.
+ */
+struct interface {
+	void (EFIAPI * inc)(void);
+};
+
+struct context {
+	void *registration_key;
+	efi_uintn_t notify_count;
+	efi_uintn_t handle_count;
+	efi_handle_t *handles;
+};
+
+static struct efi_boot_services *boottime;
+static efi_guid_t guid1 =
+	EFI_GUID(0x2e7ca819, 0x21d3, 0x0a3a,
+		 0xf7, 0x91, 0x82, 0x1f, 0x7a, 0x83, 0x67, 0xaf);
+static efi_guid_t guid2 =
+	EFI_GUID(0xf909f2bb, 0x90a8, 0x0d77,
+		 0x94, 0x0c, 0x3e, 0xa8, 0xea, 0x38, 0xd6, 0x6f);
+static struct context context;
+static struct efi_event *event;
+
+/*
+ * Notification function, increments the notification count if parameter
+ * context is provided.
+ *
+ * @event	notified event
+ * @context	pointer to the notification count
+ */
+static void EFIAPI notify(struct efi_event *event, void *context)
+{
+	struct context *cp = context;
+	efi_status_t ret;
+
+	cp->notify_count++;
+
+	ret = boottime->locate_handle_buffer(BY_REGISTER_NOTIFY, NULL,
+					     cp->registration_key,
+					     &cp->handle_count,
+					     &cp->handles);
+	if (ret != EFI_SUCCESS)
+		cp->handle_count = 0;
+}
+
+/*
+ * Setup unit test.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ */
+static int setup(const efi_handle_t img_handle,
+		 const struct efi_system_table *systable)
+{
+	efi_status_t ret;
+
+	boottime = systable->boottime;
+
+	ret = boottime->create_event(EVT_NOTIFY_SIGNAL,
+				     TPL_CALLBACK, notify, &context,
+				     &event);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not create event\n");
+		return EFI_ST_FAILURE;
+	}
+
+	ret = boottime->register_protocol_notify(&guid1, event,
+						 &context.registration_key);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not register event\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Tear down unit test.
+ *
+ */
+static int teardown(void)
+{
+	efi_status_t ret;
+
+	if (event) {
+		ret = boottime->close_event(event);
+		event = NULL;
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("could not close event\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ */
+static int execute(void)
+{
+	efi_status_t ret;
+	efi_handle_t handle1 = NULL, handle2 = NULL;
+	struct interface interface1, interface2;
+
+	ret = boottime->install_protocol_interface(&handle1, &guid1,
+						   EFI_NATIVE_INTERFACE,
+						   &interface1);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not install interface\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!context.notify_count) {
+		efi_st_error("install was not notified\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.notify_count > 1) {
+		efi_st_error("install was notified too often\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.handle_count != 1) {
+		efi_st_error("LocateHandle failed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->free_pool(context.handles);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("FreePool failed\n");
+		return EFI_ST_FAILURE;
+	}
+	context.notify_count = 0;
+	ret = boottime->install_protocol_interface(&handle1, &guid2,
+						   EFI_NATIVE_INTERFACE,
+						   &interface1);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not install interface\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.notify_count) {
+		efi_st_error("wrong protocol was notified\n");
+		return EFI_ST_FAILURE;
+	}
+	context.notify_count = 0;
+	ret = boottime->reinstall_protocol_interface(handle1, &guid1,
+						     &interface1, &interface2);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not reinstall interface\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!context.notify_count) {
+		efi_st_error("reinstall was not notified\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.notify_count > 1) {
+		efi_st_error("reinstall was notified too often\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.handle_count != 1) {
+		efi_st_error("LocateHandle failed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->free_pool(context.handles);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("FreePool failed\n");
+		return EFI_ST_FAILURE;
+	}
+	context.notify_count = 0;
+	ret = boottime->install_protocol_interface(&handle2, &guid1,
+						   EFI_NATIVE_INTERFACE,
+						   &interface1);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("could not install interface\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!context.notify_count) {
+		efi_st_error("install was not notified\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.notify_count > 1) {
+		efi_st_error("install was notified too often\n");
+		return EFI_ST_FAILURE;
+	}
+	if (context.handle_count != 2) {
+		efi_st_error("LocateHandle failed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->free_pool(context.handles);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("FreePool failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	ret = boottime->uninstall_multiple_protocol_interfaces
+			(handle1, &guid1, &interface2,
+			 &guid2, &interface1, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("UninstallMultipleProtocolInterfaces failed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->uninstall_multiple_protocol_interfaces
+			(handle2, &guid1, &interface1, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("UninstallMultipleProtocolInterfaces failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(regprotnot) = {
+	.name = "register protocol notify",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+	.teardown = teardown,
+};