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[block] Allow SAN boot device to be identified by UUID

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Add a "--uuid" option which may be used to specify a boot device UUID,
to be matched against the GPT partition GUID.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2024-03-06 08:55:55 +00:00
parent c4471e3408
commit cea22d76e4
5 changed files with 41 additions and 7 deletions
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18
src/interface/efi/efi_block.c
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@@ -597,6 +597,7 @@ static int efi_block_match ( unsigned int drive, EFI_HANDLE handle,
EFI_DEVICE_PATH_PROTOCOL *path;
void *interface;
} u;
union uuid guid;
EFI_STATUS efirc;
int rc;
@@ -623,6 +624,21 @@ static int efi_block_match ( unsigned int drive, EFI_HANDLE handle,
DBGC ( drive, "EFIBLK %#02x contains filesystem %s\n",
drive, efi_devpath_text ( u.path ) );
/* Check if filesystem matches GUID, if applicable */
if ( config->uuid ) {
if ( ( rc = efi_path_guid ( u.path, &guid ) ) != 0 ) {
DBGC ( drive, "EFIBLK %#02x could not determine GUID: "
"%s\n", drive, strerror ( rc ) );
goto err_no_guid;
}
if ( memcmp ( config->uuid, &guid, sizeof ( guid ) ) != 0 ) {
DBGC ( drive, "EFIBLK %#02x has wrong GUID %s\n",
drive, uuid_ntoa ( &guid ) );
rc = -ENOENT;
goto err_wrong_guid;
}
}
/* Check if filesystem contains boot filename */
if ( ( rc = efi_block_filename ( drive, handle,
config->filename ) ) != 0 ) {
@@ -633,6 +649,8 @@ static int efi_block_match ( unsigned int drive, EFI_HANDLE handle,
rc = 0;
err_filename:
err_wrong_guid:
err_no_guid:
err_not_child:
bs->CloseProtocol ( handle, protocol, efi_image_handle, handle );
err_open: