> -----Original Message----- > From: Chia-Yu Chang (Nokia) > Sent: Tuesday, January 20, 2026 12:38 PM > To: 'Eric Dumazet' <[email protected]> > Cc: [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; Koen De Schepper (Nokia) > <[email protected]>; [email protected]; > [email protected]; [email protected]; cheshire > <[email protected]>; [email protected]; [email protected]; Vidhi Goel > <[email protected]> > Subject: RE: [PATCH v9 net-next 13/15] tcp: accecn: add tcpi_ecn_mode and > tcpi_option2 in tcp_info > > > -----Original Message----- > > From: Eric Dumazet <[email protected]> > > Sent: Tuesday, January 20, 2026 12:18 PM > > To: Chia-Yu Chang (Nokia) <[email protected]> > > Cc: [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected]; [email protected]; > > [email protected]; Koen De Schepper (Nokia) > > <[email protected]>; [email protected]; > > [email protected]; [email protected]; > > cheshire <[email protected]>; [email protected]; > > [email protected]; Vidhi Goel <[email protected]> > > Subject: Re: [PATCH v9 net-next 13/15] tcp: accecn: add tcpi_ecn_mode > > and tcpi_option2 in tcp_info > > > > > > CAUTION: This is an external email. Please be very careful when clicking > > links or opening attachments. See the URL nok.it/ext for additional > > information. > > > > > > > > On Mon, Jan 19, 2026 at 7:59 PM <[email protected]> wrote: > > > > > > From: Chia-Yu Chang <[email protected]> > > > > > > Add 2-bit tcpi_ecn_mode feild within tcp_info to indicate which ECN > > > mode is negotiated: ECN_MODE_DISABLED, ECN_MODE_RFC3168, > > > ECN_MODE_ACCECN, or ECN_MODE_PENDING. This is done by utilizing > > > available bits from tcpi_accecn_opt_seen (reduced from 16 bits to 2 > > > bits) and tcpi_accecn_fail_mode (reduced from 16 bits to 4 bits). > > > > > > Also, an extra 24-bit tcpi_options2 field is identified to represent > > > newer options and connection features, as all 8 bits of tcpi_options > > > field have been used. > > > > > > Signed-off-by: Chia-Yu Chang <[email protected]> > > > Co-developed-by: Neal Cardwell <[email protected]> > > > Signed-off-by: Neal Cardwell <[email protected]> > > > > Are you sure Neal Cardwell really is ok with this patch, saw it and gave > > his SOB ?
This was discussed in another thread with Neal: "[PATCH net-next 1/1] selftests/net: Add packetdrill packetdrill cases". And Neal/me discussed this change. But it was my miss that not syncing live update of tcp_info in packetdrill. So, I will fix in the next net-next, thanks. Chia-Yu
