Add additional message when backendfs is extfs without d_type support
ext4 support d_type by default, but filetype feature is a tunable so
there is still a chance to disable it for some reasons. In this case,
print additional message to explicitly tell how to support d_type.
@@ -14,6 +14,11 @@ func ErrDTypeNotSupported(driver, backingFs string) error {
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support."
}
+
+ if backingFs == "extfs" {
+ msg += " Reformat the filesystem (or use tune2fs) with -O filetype flag to enable d_type support."
+ }
+
msg += " Backing filesystems without d_type support are not supported."
return graphdriver.NotSupportedError(msg)
