[PATCH 5/5] efi_selftest: Enhance MBR test for PARTITION_INFO_PROTOCOL

[Javier Martinez Canillas <javierm@redhat.com>]

The EFI_PARTITION_INFO_PROTOCOL test was added before the protocol fully
supported MBR partitions. As a result, it lacked specific checks for the
content of the raw MBR partition record.

Now that MBR support has been implemented, enhance the selftest to provide
coverage for the MBR entries too.

This verifies that the protocol correctly reads and exposes MBR partition
records and prevents this functionality to regress due future changes.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---

 lib/efi_selftest/efi_selftest_block_device.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/efi_selftest/efi_selftest_block_device.c b/lib/efi_selftest/efi_selftest_block_device.c
index f145e58a267a..50d1fb29e1ef 100644
--- a/lib/efi_selftest/efi_selftest_block_device.c
+++ b/lib/efi_selftest/efi_selftest_block_device.c
@@ -404,6 +404,18 @@ static int execute(void)
 			     part_info->system);
 		return EFI_ST_FAILURE;
 	}
+	/* The first partition starts at LBA 1 on the test image */
+	if (part_info->info.mbr.start_sect != 1) {
+		efi_st_error("MBR start sector %d, expected 1\n",
+			     part_info->info.mbr.start_sect);
+		return EFI_ST_FAILURE;
+	}
+	/* The partition type is FAT12 (0x01) in the test image */
+	if (part_info->info.mbr.sys_ind != 0x01) {
+		efi_st_error("MBR system indicator %d, expected 1\n",
+			     part_info->info.mbr.sys_ind);
+		return EFI_ST_FAILURE;
+	}
 
 	/* Open the simple file system protocol */
 	ret = boottime->open_protocol(handle_partition,
-- 
2.52.0