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Subject: Re: [PATCH] can: raw: add missing error queue support
To:     Vincent Mailhol <mailhol.vincent@wanadoo.fr>,
        linux-can@vger.kernel.org
Cc:     Oliver Hartkopp <socketcan@hartkopp.net>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
References: <20200926162527.270030-1-mailhol.vincent@wanadoo.fr>
From:   Marc Kleine-Budde <mkl@pengutronix.de>
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Message-ID: <24898bf1-ee74-0281-bbaa-b8f922904ba9@pengutronix.de>
Date:   Sun, 4 Oct 2020 11:39:45 +0200
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In-Reply-To: <20200926162527.270030-1-mailhol.vincent@wanadoo.fr>
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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Vincent Mailhol <mailhol.vincent@wanadoo.fr>, linux-can@vger.kernel.org
Cc: Oliver Hartkopp <socketcan@hartkopp.net>,
 "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>,
 linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Message-ID: <24898bf1-ee74-0281-bbaa-b8f922904ba9@pengutronix.de>
Subject: Re: [PATCH] can: raw: add missing error queue support
References: <20200926162527.270030-1-mailhol.vincent@wanadoo.fr>
In-Reply-To: <20200926162527.270030-1-mailhol.vincent@wanadoo.fr>

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On 9/26/20 6:24 PM, Vincent Mailhol wrote:
> Error queue are not yet implemented in CAN-raw sockets.
>=20
> The problem: a userland call to recvmsg(soc, msg, MSG_ERRQUEUE) on a
> CAN-raw socket would unqueue messages from the normal queue without
> any kind of error or warning. As such, it prevented CAN drivers from
> using the functionalities that relies on the error queue such as
> skb_tx_timestamp().
>=20
> SCM_CAN_RAW_ERRQUEUE is defined as the type for the CAN raw error
> queue. SCM stands for "Socket control messages". The name is inspired
> from SCM_J1939_ERRQUEUE of include/uapi/linux/can/j1939.h.
>=20
> Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>

Applied to linux-can-next.

Tnx,
Marc

--=20
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
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