[RFC 22/22] efi_selftest: block device: adjust dp for a test disk

[Heinrich Schuchardt]

On 10/1/21 07:02, AKASHI Takahiro wrote:
> Due to efi_disk-dm integration, the resultant device path for a test disk
> got slightly changed, with efi_root contained as the first component.

The caller of ConnectController() creates a handle with a devicepath and
a block IO protocol. The caller can choose whatever devicepath he wants.

If this test fails without this patch, this indicates that you broke the
code. Please, review your design.

Best regards

Heinrich

>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
> ---
>   lib/efi_selftest/efi_selftest_block_device.c | 26 ++++++++++++++++++--
>   1 file changed, 24 insertions(+), 2 deletions(-)
>
> diff --git a/lib/efi_selftest/efi_selftest_block_device.c b/lib/efi_selftest/efi_selftest_block_device.c
> index 15f03751ac87..cac76249e6b4 100644
> --- a/lib/efi_selftest/efi_selftest_block_device.c
> +++ b/lib/efi_selftest/efi_selftest_block_device.c
> @@ -30,6 +30,9 @@ static const efi_guid_t guid_device_path = EFI_DEVICE_PATH_PROTOCOL_GUID;
>   static const efi_guid_t guid_simple_file_system_protocol =
>   					EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
>   static const efi_guid_t guid_file_system_info = EFI_FILE_SYSTEM_INFO_GUID;
> +static efi_guid_t guid_uboot =
> +	EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
> +		 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b);
>   static efi_guid_t guid_vendor =
>   	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
>   		 0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xb7, 0xb8);
> @@ -206,25 +209,44 @@ static int setup(const efi_handle_t handle,
>
>   	ret = boottime->allocate_pool(EFI_LOADER_DATA,
>   				      sizeof(struct efi_device_path_vendor) +
> +				      sizeof(struct efi_device_path_vendor) +
> +				      sizeof(u8) +
>   				      sizeof(struct efi_device_path),
>   				      (void **)&dp);
>   	if (ret != EFI_SUCCESS) {
>   		efi_st_error("Out of memory\n");
>   		return EFI_ST_FAILURE;
>   	}
> +	/* first part */
>   	vendor_node.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
>   	vendor_node.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
>   	vendor_node.dp.length = sizeof(struct efi_device_path_vendor);
>
> -	boottime->copy_mem(&vendor_node.guid, &guid_vendor,
> +	boottime->copy_mem(&vendor_node.guid, &guid_uboot,
>   			   sizeof(efi_guid_t));
>   	boottime->copy_mem(dp, &vendor_node,
>   			   sizeof(struct efi_device_path_vendor));
> +
> +	/* second part */
> +	vendor_node.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
> +	vendor_node.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
> +	vendor_node.dp.length = sizeof(struct efi_device_path_vendor) + 1;
> +
> +	boottime->copy_mem(&vendor_node.guid, &guid_vendor,
> +			   sizeof(efi_guid_t));
> +	boottime->copy_mem((char *)dp + sizeof(struct efi_device_path_vendor),
> +			   &vendor_node,
> +			   sizeof(struct efi_device_path_vendor));
> +	/* vendor_data[0] */
> +	*((char *)dp + sizeof(struct efi_device_path_vendor) * 2) = 0;
> +
>   	end_node.type = DEVICE_PATH_TYPE_END;
>   	end_node.sub_type = DEVICE_PATH_SUB_TYPE_END;
>   	end_node.length = sizeof(struct efi_device_path);
>
> -	boottime->copy_mem((char *)dp + sizeof(struct efi_device_path_vendor),
> +	boottime->copy_mem((char *)dp + sizeof(struct efi_device_path_vendor)
> +			   + sizeof(struct efi_device_path_vendor)
> +			   + sizeof(u8),
>   			   &end_node, sizeof(struct efi_device_path));
>   	ret = boottime->install_protocol_interface(&disk_handle,
>   						   &guid_device_path,
>