mountfsd: return a better error when invalid file flags are specified on image fd

We already defined an error for this that we return for invalid dir fds
passed in, let's add the same niceness to the image fds.

diff --git a/src/mountfsd/mountwork.c b/src/mountfsd/mountwork.c
index 4c321ce1c07e4489bf14e91787b8f828d8fddb41..7de8784e326d0eab8ed38992af8c633b1e3df286 100644 (file)
--- a/src/mountfsd/mountwork.c
+++ b/src/mountfsd/mountwork.c
@@ -353,6 +353,8 @@ static int vl_method_mount_image(
         }
 
         r = validate_image_fd(image_fd, &p);
+        if (r == -EREMOTEIO)
+                return sd_varlink_errorbo(link, "io.systemd.MountFileSystem.BadFileDescriptorFlags", SD_JSON_BUILD_PAIR_STRING("parameter", "imageFileDescriptor"));
         if (r < 0)
                 return r;