[efi] Add efi_path_terminate() utility function

Signed-off-by: Michael Brown <mcb30@ipxe.org>

5 files changed, 24 insertions, 33 deletions

diff --git a/src/image/efi_image.c b/src/image/efi_image.c
index 3c98dec..66a1952 100644
--- a/src/image/efi_image.c
+++ b/src/image/efi_image.c
@@ -96,9 +96,7 @@ efi_image_path ( struct image *image, EFI_DEVICE_PATH_PROTOCOL *parent ) {
 	efi_snprintf ( filepath->PathName, ( name_len + 1 /* NUL */ ),
 		       "%s", image->name );
 	end = ( ( ( void * ) filepath ) + filepath_len );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	return path;
 }
diff --git a/src/include/ipxe/efi/efi_path.h b/src/include/ipxe/efi/efi_path.h
index 9dea74b..98b922a 100644
--- a/src/include/ipxe/efi/efi_path.h
+++ b/src/include/ipxe/efi/efi_path.h
@@ -21,6 +21,19 @@ struct fcp_description;
 struct ib_srp_device;
 struct usb_function;
 
+/**
+ * Terminate device path
+ *
+ * @v end		End of device path to fill in
+ */
+static inline void efi_path_terminate ( EFI_DEVICE_PATH_PROTOCOL *end ) {
+
+	end->Type = END_DEVICE_PATH_TYPE;
+	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
+	end->Length[0] = sizeof ( *end );
+	end->Length[1] = 0;
+}
+
 extern EFI_DEVICE_PATH_PROTOCOL *
 efi_path_next ( EFI_DEVICE_PATH_PROTOCOL *path );
 extern EFI_DEVICE_PATH_PROTOCOL *
diff --git a/src/interface/efi/efi_block.c b/src/interface/efi/efi_block.c
index 74cf7c0..cb73260 100644
--- a/src/interface/efi/efi_block.c
+++ b/src/interface/efi/efi_block.c
@@ -582,9 +582,7 @@ static int efi_block_boot_image ( struct san_device *sandev, EFI_HANDLE handle,
 			 sizeof ( efi_block_boot_filename ) );
 	}
 	end = ( ( ( void * ) filepath ) + filepath_len );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 	DBGC ( sandev, "EFIBLK %#02x trying to load %s\n",
 	       sandev->drive, efi_devpath_text ( boot_path ) );
 
diff --git a/src/interface/efi/efi_path.c b/src/interface/efi/efi_path.c
index fb0f305..50027b7 100644
--- a/src/interface/efi/efi_path.c
+++ b/src/interface/efi/efi_path.c
@@ -161,9 +161,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_paths ( EFI_DEVICE_PATH_PROTOCOL *first, ... ) {
 	}
 	va_end ( args );
 	end = dst;
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	return path;
 }
@@ -223,9 +221,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_netdev_path ( struct net_device *netdev ) {
 	} else {
 		end = ( ( ( void * ) macpath ) + sizeof ( *macpath ) );
 	}
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	return path;
 }
@@ -265,9 +261,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_uri_path ( struct uri *uri ) {
 	uripath->Header.Length[1] = ( uripath_len >> 8 );
 	format_uri ( uri, uripath->Uri, uri_len );
 	end = ( ( ( void * ) path ) + uripath_len );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	return path;
 }
@@ -324,9 +318,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_iscsi_path ( struct iscsi_session *iscsi ) {
 	name = ( ( ( void * ) iscsipath ) + sizeof ( *iscsipath ) );
 	memcpy ( name, iscsi->target_iqn, name_len );
 	end = ( ( ( void * ) name ) + name_len );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	/* Free temporary paths */
 	free ( netpath );
@@ -366,9 +358,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_aoe_path ( struct aoe_device *aoedev ) {
 	satapath.sata.Header.Length[0] = sizeof ( satapath.sata );
 	satapath.sata.HBAPortNumber = aoedev->major;
 	satapath.sata.PortMultiplierPortNumber = aoedev->minor;
-	satapath.end.Type = END_DEVICE_PATH_TYPE;
-	satapath.end.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	satapath.end.Length[0] = sizeof ( satapath.end );
+	efi_path_terminate ( &satapath.end );
 
 	/* Construct overall device path */
 	path = efi_paths ( netpath, &satapath, NULL );
@@ -409,9 +399,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_fcp_path ( struct fcp_description *desc ) {
 	path->fc.Header.Length[0] = sizeof ( path->fc );
 	memcpy ( path->fc.WWN, &desc->wwn, sizeof ( path->fc.WWN ) );
 	memcpy ( path->fc.Lun, &desc->lun, sizeof ( path->fc.Lun ) );
-	path->end.Type = END_DEVICE_PATH_TYPE;
-	path->end.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	path->end.Length[0] = sizeof ( path->end );
+	efi_path_terminate ( &path->end );
 
 	return &path->fc.Header;
 }
@@ -463,9 +451,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_ib_srp_path ( struct ib_srp_device *ib_srp ) {
 	memcpy ( &ibpath->DeviceId, &id->ib.id_ext,
 		 sizeof ( ibpath->DeviceId ) );
 	end = ( ( ( void * ) ibpath ) + sizeof ( *ibpath ) );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 
 	return path;
 }
@@ -511,9 +497,7 @@ EFI_DEVICE_PATH_PROTOCOL * efi_usb_path ( struct usb_function *func ) {
 	/* Construct device path */
 	memcpy ( path, efidev->path, prefix_len );
 	end = ( ( ( void * ) path ) + len - sizeof ( *end ) );
-	end->Type = END_DEVICE_PATH_TYPE;
-	end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	end->Length[0] = sizeof ( *end );
+	efi_path_terminate ( end );
 	usbpath = ( ( ( void * ) end ) - sizeof ( *usbpath ) );
 	usbpath->InterfaceNumber = func->interface[0];
 	for ( ; usb ; usbpath--, usb = usb->port->hub->usb ) {
diff --git a/src/interface/efi/efi_snp_hii.c b/src/interface/efi/efi_snp_hii.c
index 5d5f80c..8b65c8a 100644
--- a/src/interface/efi/efi_snp_hii.c
+++ b/src/interface/efi/efi_snp_hii.c
@@ -704,9 +704,7 @@ int efi_snp_hii_install ( struct efi_snp_device *snpdev ) {
 	vendor_path->Header.Length[0] = sizeof ( *vendor_path );
 	efi_snp_hii_random_guid ( &vendor_path->Guid );
 	path_end = ( ( void * ) ( vendor_path + 1 ) );
-	path_end->Type = END_DEVICE_PATH_TYPE;
-	path_end->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
-	path_end->Length[0] = sizeof ( *path_end );
+	efi_path_terminate ( path_end );
 
 	/* Create device path and child handle for HII association */
 	if ( ( efirc = bs->InstallMultipleProtocolInterfaces (