linux-kernel - [PATCH RESEND 0/2] j1939: make sure that sent DAT/CTL frames are marked as TX

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Date:   Mon,  9 May 2022 19:07:44 +0200
From:   Devid Antonio Filoni <devid.filoni@...uetechnologies.com>
To:     Robin van der Gracht <robin@...tonic.nl>,
        Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     kernel@...gutronix.de, linux-can@...r.kernel.org,
        Oleksij Rempel <linux@...pel-privat.de>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Jayat <maxime.jayat@...ile-devices.fr>,
        kbuild test robot <lkp@...el.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Devid Antonio Filoni <devid.filoni@...uetechnologies.com>
Subject: [PATCH RESEND 0/2] j1939: make sure that sent DAT/CTL frames are marked as TX

Hello,

If candump -x is used to dump CAN bus traffic on an interface while a J1939
socket is sending multi-packet messages, then the DAT and CTL frames
show up as RX instead of TX.

This patch series sets to generated struct sk_buff the owning struct sock
pointer so that the MSG_DONTROUTE flag can be set by recv functions.

I'm not sure that j1939_session_skb_get is needed, I think that session->sk
could be directly passed as can_skb_set_owner parameter. This patch
is based on j1939_simple_txnext function which uses j1939_session_skb_get.
I can provide an additional patch to remove the calls to
j1939_session_skb_get function if you think they are not needed.

Thank you,
Devid

Devid Antonio Filoni (2):
  can: j1939: make sure that sent DAT frames are marked as TX
  can: j1939: make sure that sent CTL frames are marked as TX

 net/can/j1939/transport.c | 69 ++++++++++++++++++++++++++++++++-------
 1 file changed, 57 insertions(+), 12 deletions(-)

-- 
2.25.1