On Sat, Mar 28, 2020 at 02:53:49PM -0700, Kees Cook wrote:

quoted

quoted

quoted

+/* definitions for hide_pid field */
+enum {
+	HIDEPID_OFF            = 0,
+	HIDEPID_NO_ACCESS      = 1,
+	HIDEPID_INVISIBLE      = 2,
+	HIDEPID_NOT_PTRACEABLE = 4,
+};

Should the numeric values still be UAPI if there is string parsing now?

I think yes, because these are still valid hidepid= values.

But if we don't expose the values, we can do whatever we like with
future numbers (e.g. the "is this a value or a bit field?" question).

Alexey Dobriyan suggested to put these parameters into the UAPI and it
makes sense because these are user parameters.

-- 
Rgrds, legion