Re: [RFC ovpn net] ovpn: use monotonic clock for peer keepalive timeouts

Hi Marco,

On 29/05/2026 15:15, Marco Baffo wrote:
> Replace ktime_get_real_seconds() with the monotonic ktime_get_boottime_seconds()
> to ensure the keepalive mechanism is robust against system clock modifications.
> 
> Right now, the driver uses ktime_get_real_seconds() to track peer timeouts,
> relying on the system wall-clock.
> 
> An administrative time adjustment or an NTP sync that steps the clock forward
> can cause `now' to instantly exceed `last_recv + timeout'.
> 
> When this occurs, the driver artificially expires healthy peers. Depending on
> the OpenVPN user-space configuration, this triggers a premature tunnel restart
> (if --keepalive or --ping-restart is used) or a complete disconnection of the
> client (if --ping-exit is used).
> 
> Signed-off-by: Marco Baffo <[email protected]>

This looks good. Please send it as PATCH so that I can queue it for 
sending to net.

Cheers,



-- 
Antonio Quartulli