linux-kernel - [RFC PATCH v2 5/6] can: netlink: extend stats to the error types (ack, CRC, form, ...)

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Message-ID: <20241029084525.2858224-6-dario.binacchi@amarulasolutions.com>
Date: Tue, 29 Oct 2024 09:44:49 +0100
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Vincent Mailhol <mailhol.vincent@...adoo.fr>,
	linux-can@...r.kernel.org
Subject: [RFC PATCH v2 5/6] can: netlink: extend stats to the error types (ack, CRC, form, ...)

The CAN bus protocol specifies 5 CAN error types:

- Bit Error [Transmitter]
- Bit Stuffing Error [Receiver]
- Form Error [Receiver]
- ACK Error (Acknowledgment) [Transmitter]
- CRC Error (Cyclic Redundancy Check) [Receiver]

The patch also adds the corresponding counters to the statistics. Since
each device/driver can determine which of these errors has occurred, why
not export this information along with the more general counters?

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---

(no changes since v1)

 include/uapi/linux/can/netlink.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/uapi/linux/can/netlink.h b/include/uapi/linux/can/netlink.h
index 02ec32d69474..8b33549e7e19 100644
--- a/include/uapi/linux/can/netlink.h
+++ b/include/uapi/linux/can/netlink.h
@@ -114,6 +114,12 @@ struct can_device_stats {
 	__u32 bus_off;		/* Changes to bus off state */
 	__u32 arbitration_lost; /* Arbitration lost errors */
 	__u32 restarts;		/* CAN controller re-starts */
+	__u32 bit_error;        /* Bit error */
+	__u32 stuff_error;      /* Bit stuffing error */
+	__u32 form_error;       /* form error */
+	__u32 ack_error;        /* ack error */
+	__u32 crc_error;        /* CRC error */
+	__u32 pad;
 };
 
 /*
-- 
2.43.0