[efi] Provide manufacturer and driver names to all veto checking methods

Most veto checks are likely to use the manufacturer name and driver
name, so pass these as parameters to minimise code duplication.

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

src/interface/efi/efi_veto.c

@@ -20,6 +20,7 @@
 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stddef.h>
+#include <stdlib.h>
 #include <string.h>
 #include <errno.h>
 #include <ipxe/settings.h>
@@ -45,11 +46,14 @@ struct efi_veto {
 	 * @v binding		Driver binding protocol
 	 * @v loaded		Loaded image protocol
 	 * @v wtf		Component name protocol, if present
+	 * @v manufacturer	Manufacturer name, if present
+	 * @v name		Driver name (in "eng" language), if present
 	 * @ret vetoed		Driver is to be vetoed
 	 */
 	int ( * veto ) ( EFI_DRIVER_BINDING_PROTOCOL *binding,
 			 EFI_LOADED_IMAGE_PROTOCOL *loaded,
-			 EFI_COMPONENT_NAME_PROTOCOL *wtf );
+			 EFI_COMPONENT_NAME_PROTOCOL *wtf,
+			 const char *manufacturer, const CHAR16 *name );
 };
 
 /**
@@ -58,31 +62,28 @@ struct efi_veto {
  * @v binding		Driver binding protocol
  * @v loaded		Loaded image protocol
  * @v wtf		Component name protocol, if present
+ * @v manufacturer	Manufacturer name, if present
+ * @v name		Driver name, if present
  * @ret vetoed		Driver is to be vetoed
  */
 static int
 efi_veto_dell_ip4config ( EFI_DRIVER_BINDING_PROTOCOL *binding __unused,
 			  EFI_LOADED_IMAGE_PROTOCOL *loaded __unused,
-			  EFI_COMPONENT_NAME_PROTOCOL *wtf ) {
+			  EFI_COMPONENT_NAME_PROTOCOL *wtf __unused,
+			  const char *manufacturer, const CHAR16 *name ) {
 	static const CHAR16 ip4cfg[] = L"IP4 CONFIG Network Service Driver";
-	static const char dell[] = "Dell Inc.";
+	static const char *dell = "Dell Inc.";
-	char manufacturer[ sizeof ( dell ) ];
-	CHAR16 *name;
 
-	/* Check driver name */
+	/* Check manufacturer and driver name */
-	if ( ! wtf )
+	if ( ! manufacturer )
 		return 0;
-	if ( wtf->GetDriverName ( wtf, "eng", &name ) != 0 )
+	if ( ! name )
+		return 0;
+	if ( strcmp ( manufacturer, dell ) != 0 )
 		return 0;
 	if ( memcmp ( name, ip4cfg, sizeof ( ip4cfg ) ) != 0 )
 		return 0;
 
-	/* Check manufacturer */
-	fetch_string_setting ( NULL, &manufacturer_setting, manufacturer,
-			       sizeof ( manufacturer ) );
-	if ( strcmp ( manufacturer, dell ) != 0 )
-		return 0;
-
 	return 1;
 }
 
@@ -98,10 +99,12 @@ static struct efi_veto efi_vetoes[] = {
  * Find driver veto, if any
  *
  * @v driver		Driver binding handle
+ * @v manufacturer	Manufacturer name, if present
  * @ret veto		Driver veto, or NULL
  * @ret rc		Return status code
  */
-static int efi_veto ( EFI_HANDLE driver, struct efi_veto **veto ) {
+static int efi_veto_find ( EFI_HANDLE driver, const char *manufacturer,
+			   struct efi_veto **veto ) {
 	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
 	union {
 		EFI_DRIVER_BINDING_PROTOCOL *binding;
@@ -115,6 +118,7 @@ static int efi_veto ( EFI_HANDLE driver, struct efi_veto **veto ) {
 		EFI_COMPONENT_NAME_PROTOCOL *wtf;
 		void *interface;
 	} wtf;
+	CHAR16 *name;
 	unsigned int i;
 	EFI_HANDLE image;
 	EFI_STATUS efirc;
@@ -161,11 +165,19 @@ static int efi_veto ( EFI_HANDLE driver, struct efi_veto **veto ) {
 		wtf.interface = NULL;
 	}
 
+	/* Get driver name, if available */
+	if ( wtf.wtf &&
+	     ( ( efirc = wtf.wtf->GetDriverName ( wtf.wtf, "eng",
+						  &name ) != 0 ) ) ) {
+		/* Ignore failure; is not required to be present */
+		name = NULL;
+	}
+
 	/* Check vetoes */
 	for ( i = 0 ; i < ( sizeof ( efi_vetoes ) /
 			    sizeof ( efi_vetoes[0] ) ) ; i++ ) {
 		if ( efi_vetoes[i].veto ( binding.binding, loaded.loaded,
-					  wtf.wtf ) ) {
+					  wtf.wtf, manufacturer, name ) ) {
 			*veto = &efi_vetoes[i];
 			break;
 		}
@@ -199,6 +211,7 @@ void efi_veto_unload ( void ) {
 	EFI_HANDLE driver;
 	UINTN num_drivers;
 	unsigned int i;
+	char *manufacturer;
 	EFI_STATUS efirc;
 	int rc;
 
@@ -212,12 +225,17 @@ void efi_veto_unload ( void ) {
 		return;
 	}
 
+	/* Get manufacturer name */
+	fetch_string_setting_copy ( NULL, &manufacturer_setting,
+				    &manufacturer );
+
 	/* Unload any vetoed drivers */
 	for ( i = 0 ; i < num_drivers ; i++ ) {
 		driver = drivers[i];
-		if ( ( rc = efi_veto ( driver, &veto ) ) != 0 ) {
+		if ( ( rc = efi_veto_find ( driver, manufacturer,
-			DBGC ( driver, "EFIVETO could not determine "
+					    &veto ) ) != 0 ) {
-			       "vetoing for %s: %s\n",
+			DBGC ( driver, "EFIVETO %s could not determine "
+			       "vetoing: %s\n",
 			       efi_handle_name ( driver ), strerror ( rc ) );
 			continue;
 		}
@@ -232,6 +250,9 @@ void efi_veto_unload ( void ) {
 		}
 	}
 
+	/* Free manufacturer name */
+	free ( manufacturer );
+
 	/* Free handle list */
 	bs->FreePool ( drivers );
 }