efi_selftest: test EFI_LOAD_FILE_PROTOCOL

A unit test is supplied to test the support for the EFI_LOAD_FILE_PROTOCOL
and the EFI_LOAD_FILE2_PROTOCOL by the LoadImage() boot service.

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

2 files changed, 478 insertions, 0 deletions

diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile
index 706df0b27b7..426552bfa01 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -28,6 +28,7 @@ efi_selftest_event_groups.o \
 efi_selftest_exception.o \
 efi_selftest_exitbootservices.o \
 efi_selftest_gop.o \
+efi_selftest_load_file.o \
 efi_selftest_loaded_image.o \
 efi_selftest_loadimage.o \
 efi_selftest_manageprotocols.o \
@@ -94,6 +95,8 @@ $(obj)/efi_miniapp_file_image_return.h: $(obj)/efi_selftest_miniapp_return.efi
 
 $(obj)/efi_selftest_exception.o: $(obj)/efi_miniapp_file_image_exception.h
 
+$(obj)/efi_selftest_load_file.o: $(obj)/efi_miniapp_file_image_exit.h
+
 $(obj)/efi_selftest_loadimage.o: $(obj)/efi_miniapp_file_image_exit.h
 
 $(obj)/efi_selftest_startimage_exit.o: $(obj)/efi_miniapp_file_image_exit.h
diff --git a/lib/efi_selftest/efi_selftest_load_file.c b/lib/efi_selftest/efi_selftest_load_file.c
new file mode 100644
index 00000000000..4473e7c36ed
--- /dev/null
+++ b/lib/efi_selftest/efi_selftest_load_file.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_load_file
+ *
+ * Copyright (c) 2020 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * This test checks the handling of the LOAD_FILE and the LOAD_FILE2 protocol
+ * by the LoadImage() service.
+ */
+
+#include <efi_selftest.h>
+/* Include containing the miniapp.efi application */
+#include "efi_miniapp_file_image_exit.h"
+
+/* Block size of compressed disk image */
+#define COMPRESSED_DISK_IMAGE_BLOCK_SIZE 8
+
+/* Binary logarithm of the block size */
+#define LB_BLOCK_SIZE 9
+
+#define GUID_VENDOR \
+	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d, \
+		 0x08, 0x72, 0x81, 0x9c, 0x65, 0xfc, 0xbb, 0xd1)
+
+#define GUID_VENDOR2 \
+	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d, \
+		 0x08, 0x72, 0x81, 0x9c, 0x65, 0xfc, 0xbb, 0xd2)
+
+#define FILE_NAME_SIZE 16
+
+static const efi_guid_t efi_st_guid_load_file_protocol =
+					EFI_LOAD_FILE_PROTOCOL_GUID;
+static const efi_guid_t efi_st_guid_load_file2_protocol =
+					EFI_LOAD_FILE2_PROTOCOL_GUID;
+static const efi_guid_t efi_st_guid_device_path =
+					EFI_DEVICE_PATH_PROTOCOL_GUID;
+
+static efi_handle_t image_handle;
+static struct efi_boot_services *boottime;
+static efi_handle_t handle_lf;
+static efi_handle_t handle_lf2;
+
+/* One 8 byte block of the compressed disk image */
+struct line {
+	size_t addr;
+	char *line;
+};
+
+/* Compressed file image */
+struct compressed_file_image {
+	size_t length;
+	struct line lines[];
+};
+
+static struct compressed_file_image img = EFI_ST_DISK_IMG;
+
+static int load_file_call_count;
+static int load_file2_call_count;
+
+/* Decompressed file image */
+static u8 *image;
+
+static struct {
+	struct efi_device_path_vendor v;
+	struct efi_device_path d;
+} dp_lf_prot = {
+	{
+		{
+			DEVICE_PATH_TYPE_HARDWARE_DEVICE,
+			DEVICE_PATH_SUB_TYPE_VENDOR,
+			sizeof(struct efi_device_path_vendor),
+		},
+		GUID_VENDOR,
+	},
+	{
+		DEVICE_PATH_TYPE_END,
+		DEVICE_PATH_SUB_TYPE_END,
+		sizeof(struct efi_device_path),
+	},
+};
+
+static struct {
+	struct efi_device_path_vendor v;
+	struct efi_device_path_file_path f;
+	u16 file_name[FILE_NAME_SIZE];
+	struct efi_device_path e;
+} dp_lf_file = {
+	{
+		{
+			DEVICE_PATH_TYPE_HARDWARE_DEVICE,
+			DEVICE_PATH_SUB_TYPE_VENDOR,
+			sizeof(struct efi_device_path_vendor),
+		},
+		GUID_VENDOR,
+	},
+	{
+		{
+			DEVICE_PATH_TYPE_MEDIA_DEVICE,
+			DEVICE_PATH_SUB_TYPE_FILE_PATH,
+			sizeof(struct efi_device_path_file_path) +
+			FILE_NAME_SIZE * sizeof(u16),
+		}
+	},
+	L"\\lf.efi",
+	{
+		DEVICE_PATH_TYPE_END,
+		DEVICE_PATH_SUB_TYPE_END,
+		sizeof(struct efi_device_path),
+	},
+};
+
+struct efi_device_path *dp_lf_file_remainder = &dp_lf_file.f.dp;
+
+static struct {
+	struct efi_device_path_vendor v;
+	struct efi_device_path d;
+} dp_lf2_prot = {
+	{
+		{
+			DEVICE_PATH_TYPE_HARDWARE_DEVICE,
+			DEVICE_PATH_SUB_TYPE_VENDOR,
+			sizeof(struct efi_device_path_vendor),
+		},
+		GUID_VENDOR2,
+	},
+	{
+		DEVICE_PATH_TYPE_END,
+		DEVICE_PATH_SUB_TYPE_END,
+		sizeof(struct efi_device_path),
+	},
+};
+
+static struct {
+	struct efi_device_path_vendor v;
+	struct efi_device_path_file_path f;
+	u16 file_name[FILE_NAME_SIZE];
+	struct efi_device_path e;
+} dp_lf2_file = {
+	{
+		{
+			DEVICE_PATH_TYPE_HARDWARE_DEVICE,
+			DEVICE_PATH_SUB_TYPE_VENDOR,
+			sizeof(struct efi_device_path_vendor),
+		},
+		GUID_VENDOR2,
+	},
+	{
+		{
+			DEVICE_PATH_TYPE_MEDIA_DEVICE,
+			DEVICE_PATH_SUB_TYPE_FILE_PATH,
+			sizeof(struct efi_device_path_file_path) +
+			FILE_NAME_SIZE * sizeof(u16),
+		}
+	},
+	L"\\lf2.efi",
+	{
+		DEVICE_PATH_TYPE_END,
+		DEVICE_PATH_SUB_TYPE_END,
+		sizeof(struct efi_device_path),
+	},
+};
+
+struct efi_device_path *dp_lf2_file_remainder = &dp_lf2_file.f.dp;
+
+/*
+ * Decompress the disk image.
+ *
+ * @image	decompressed disk image
+ * @return	status code
+ */
+static efi_status_t decompress(u8 **image)
+{
+	u8 *buf;
+	size_t i;
+	size_t addr;
+	size_t len;
+	efi_status_t ret;
+
+	ret = boottime->allocate_pool(EFI_LOADER_DATA, img.length,
+				      (void **)&buf);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Out of memory\n");
+		return ret;
+	}
+	boottime->set_mem(buf, img.length, 0);
+
+	for (i = 0; ; ++i) {
+		if (!img.lines[i].line)
+			break;
+		addr = img.lines[i].addr;
+		len = COMPRESSED_DISK_IMAGE_BLOCK_SIZE;
+		if (addr + len > img.length)
+			len = img.length - addr;
+		boottime->copy_mem(buf + addr, img.lines[i].line, len);
+	}
+	*image = buf;
+	return ret;
+}
+
+/*
+ * load_file() - LoadFile() service of a EFI_LOAD_FILE_PROTOCOL
+ *
+ * @this:		instance of EFI_LOAD_FILE_PROTOCOL
+ * @file_path:		remaining device path
+ * @boot_policy:	true if called by boot manager
+ * @buffer_size:	(required) buffer size
+ * @buffer:		buffer to which the file is to be loaded
+ */
+efi_status_t EFIAPI load_file(struct efi_load_file_protocol *this,
+			      struct efi_device_path *file_path,
+			      bool boot_policy,
+			      efi_uintn_t *buffer_size,
+			      void *buffer)
+{
+	++load_file_call_count;
+	if (memcmp(file_path, dp_lf_file_remainder,
+	    sizeof(struct efi_device_path_file_path) +
+	    FILE_NAME_SIZE * sizeof(u16) +
+	    sizeof(struct efi_device_path))) {
+		efi_st_error("Wrong remaining device path\n");
+		return EFI_NOT_FOUND;
+	}
+	if (this->load_file != load_file) {
+		efi_st_error("wrong this\n");
+		return EFI_INVALID_PARAMETER;
+	}
+	if (*buffer_size < img.length) {
+		*buffer_size = img.length;
+		return EFI_BUFFER_TOO_SMALL;
+	}
+	memcpy(buffer, image, img.length);
+	*buffer_size = img.length;
+	return EFI_SUCCESS;
+}
+
+
+/*
+ * load_file2() - LoadFile() service of a EFI_LOAD_FILE2_PROTOCOL
+ *
+ * @this:		instance of EFI_LOAD_FILE2_PROTOCOL
+ * @file_path:		remaining device path
+ * @boot_policy:	true if called by boot manager
+ * @buffer_size:	(required) buffer size
+ * @buffer:		buffer to which the file is to be loaded
+ */
+efi_status_t EFIAPI load_file2(struct efi_load_file_protocol *this,
+			       struct efi_device_path *file_path,
+			       bool boot_policy,
+			       efi_uintn_t *buffer_size,
+			       void *buffer)
+{
+	++load_file2_call_count;
+	if (memcmp(file_path, dp_lf2_file_remainder,
+	    sizeof(struct efi_device_path_file_path) +
+	    FILE_NAME_SIZE * sizeof(u16) +
+	    sizeof(struct efi_device_path))) {
+		efi_st_error("Wrong remaining device path\n");
+		return EFI_NOT_FOUND;
+	}
+	if (this->load_file != load_file2) {
+		efi_st_error("wrong this\n");
+		return EFI_INVALID_PARAMETER;
+	}
+	if (boot_policy) {
+		efi_st_error("LOAD_FILE2 called with boot_policy = true");
+		return EFI_INVALID_PARAMETER;
+	}
+	if (*buffer_size < img.length) {
+		*buffer_size = img.length;
+		return EFI_BUFFER_TOO_SMALL;
+	}
+	memcpy(buffer, image, img.length);
+	*buffer_size = img.length;
+	return EFI_SUCCESS;
+}
+
+static struct efi_load_file_protocol lf_prot = {load_file};
+static struct efi_load_file_protocol lf2_prot = {load_file2};
+
+/*
+ * Setup unit test.
+ *
+ * Install an EFI_LOAD_FILE_PROTOCOL and an EFI_LOAD_FILE2_PROTOCOL.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int efi_st_load_file_setup(const efi_handle_t handle,
+				  const struct efi_system_table *systable)
+{
+	efi_status_t ret;
+
+	image_handle = handle;
+	boottime = systable->boottime;
+
+	/* Load the application image into memory */
+	decompress(&image);
+
+	ret = boottime->install_multiple_protocol_interfaces(
+		&handle_lf,
+		&efi_st_guid_device_path,
+		&dp_lf_prot,
+		&efi_st_guid_load_file_protocol,
+		&lf_prot,
+		NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("InstallMultipleProtocolInterfaces failed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->install_multiple_protocol_interfaces(
+		&handle_lf2,
+		&efi_st_guid_device_path,
+		&dp_lf2_prot,
+		&efi_st_guid_load_file2_protocol,
+		&lf2_prot,
+		NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("InstallMultipleProtocolInterfaces failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Tear down unit test.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int efi_st_load_file_teardown(void)
+{
+	efi_status_t ret = EFI_ST_SUCCESS;
+
+	if (handle_lf) {
+		ret = boottime->uninstall_multiple_protocol_interfaces(
+			handle_lf,
+			&efi_st_guid_device_path,
+			&dp_lf_prot,
+			&efi_st_guid_load_file_protocol,
+			&lf_prot,
+			NULL);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error(
+				"UninstallMultipleProtocolInterfaces failed\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+	if (handle_lf2) {
+		ret = boottime->uninstall_multiple_protocol_interfaces(
+			handle_lf2,
+			&efi_st_guid_device_path,
+			&dp_lf2_prot,
+			&efi_st_guid_load_file2_protocol,
+			&lf2_prot,
+			NULL);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error(
+				"UninstallMultipleProtocolInterfaces failed\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+
+	if (image) {
+		ret = boottime->free_pool(image);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("Failed to free image\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+	return ret;
+}
+
+/*
+ * Execute unit test.
+ *
+ * Try loading an image via the EFI_LOAD_FILE_PROTOCOL and the
+ * EFI_LOAD_FILE2_PROTOCOL. Finally execute the image.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int efi_st_load_file_execute(void)
+{
+	efi_status_t ret;
+	efi_handle_t handle;
+	efi_uintn_t exit_data_size = 0;
+	u16 *exit_data = NULL;
+	u16 expected_text[] = EFI_ST_SUCCESS_STR;
+
+	load_file_call_count = 0;
+	load_file2_call_count = 0;
+	handle = NULL;
+	ret = boottime->load_image(true, image_handle, &dp_lf_file.v.dp, NULL,
+				   0, &handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to load image\n");
+		return EFI_ST_FAILURE;
+	}
+	if (load_file2_call_count || !load_file_call_count) {
+		efi_st_error("Wrong image loaded\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->unload_image(handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to unload image\n");
+		return EFI_ST_FAILURE;
+	}
+
+	load_file_call_count = 0;
+	load_file2_call_count = 0;
+	handle = NULL;
+	ret = boottime->load_image(false, image_handle, &dp_lf_file.v.dp, NULL,
+				   0, &handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to load image\n");
+		return EFI_ST_FAILURE;
+	}
+	if (load_file2_call_count || !load_file_call_count) {
+		efi_st_error("Wrong image loaded\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->unload_image(handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to unload image\n");
+		return EFI_ST_FAILURE;
+	}
+
+	ret = boottime->load_image(true, image_handle, &dp_lf2_file.v.dp, NULL,
+				   0, &handle);
+	if (ret != EFI_NOT_FOUND) {
+		efi_st_error(
+			"Boot manager should not use LOAD_FILE2_PROTOCOL\n");
+		return EFI_ST_FAILURE;
+	}
+
+	load_file_call_count = 0;
+	load_file2_call_count = 0;
+	handle = NULL;
+	ret = boottime->load_image(false, image_handle, &dp_lf2_file.v.dp, NULL,
+				   0, &handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to load image\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!load_file2_call_count || load_file_call_count) {
+		efi_st_error("Wrong image loaded\n");
+		return EFI_ST_FAILURE;
+	}
+
+	ret = boottime->start_image(handle, &exit_data_size, &exit_data);
+	if (ret != EFI_UNSUPPORTED) {
+		efi_st_error("Wrong return value from application\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!exit_data || exit_data_size != sizeof(expected_text) ||
+	    memcmp(exit_data, expected_text, sizeof(expected_text))) {
+		efi_st_error("Incorrect exit data\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->free_pool(exit_data);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to free exit data\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(load_file_protocol) = {
+	.name = "load file protocol",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = efi_st_load_file_setup,
+	.execute = efi_st_load_file_execute,
+	.teardown = efi_st_load_file_teardown,
+};