efi_loader: Uri() device path node

iPXE used Uri() device path nodes. So we should support them in the
device path to text protocol.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

include/efi_api.h

@@ -523,6 +523,7 @@ struct efi_device_path_acpi_path {
 #  define DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS	0x0f
 #  define DEVICE_PATH_SUB_TYPE_MSG_SATA		0x12
 #  define DEVICE_PATH_SUB_TYPE_MSG_NVME		0x17
+#  define DEVICE_PATH_SUB_TYPE_MSG_URI		0x18
 #  define DEVICE_PATH_SUB_TYPE_MSG_SD		0x1a
 #  define DEVICE_PATH_SUB_TYPE_MSG_MMC		0x1d
 
@@ -587,6 +588,11 @@ struct efi_device_path_nvme {
 	u8 eui64[8];
 } __packed;
 
+struct efi_device_path_uri {
+	struct efi_device_path dp;
+	u8 uri[];
+} __packed;
+
 #define DEVICE_PATH_TYPE_MEDIA_DEVICE		0x04
 #  define DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH	0x01
 #  define DEVICE_PATH_SUB_TYPE_CDROM_PATH	0x02

lib/efi_loader/efi_device_path_to_text.c

@@ -190,6 +190,19 @@ static char *dp_msging(char *s, struct efi_device_path *dp)
 
 		break;
 	}
+	case DEVICE_PATH_SUB_TYPE_MSG_URI: {
+		struct efi_device_path_uri *udp =
+			(struct efi_device_path_uri *)dp;
+		int n;
+
+		n = (int)udp->dp.length - sizeof(struct efi_device_path_uri);
+
+		s += sprintf(s, "Uri(");
+		if (n > 0 && n < MAX_NODE_LEN - 6)
+			s += snprintf(s, n, "%s", (char *)udp->uri);
+		s += sprintf(s, ")");
+		break;
+	}
 	case DEVICE_PATH_SUB_TYPE_MSG_SD:
 	case DEVICE_PATH_SUB_TYPE_MSG_MMC: {
 		const char *typename =