linux-kernel - [RFC PATCH v1 3/3] uapi: can: netlink: add new field to struct can

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Message-Id: <20211003050147.569044-4-mailhol.vincent@wanadoo.fr>
Date:   Sun,  3 Oct 2021 14:01:47 +0900
From:   Vincent Mailhol <mailhol.vincent@...adoo.fr>
To:     Marc Kleine-Budde <mkl@...gutronix.de>, linux-can@...r.kernel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [RFC PATCH v1 3/3] uapi: can: netlink: add new field to struct can_ctrlmode to report capabilities

This patch is for your convinience. iproute2-next normally directly
pulls the uapi changes but I think it will be more convinient for
people who want to test to just be able to directly apply this series
and have things working.

Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
---
Please do not pull!
---
 include/uapi/linux/can/netlink.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/can/netlink.h b/include/uapi/linux/can/netlink.h
index 00c763df..fa1cab72 100644
--- a/include/uapi/linux/can/netlink.h
+++ b/include/uapi/linux/can/netlink.h
@@ -88,7 +88,10 @@ struct can_berr_counter {
  * CAN controller mode
  */
 struct can_ctrlmode {
-	__u32 mask;
+	union {
+		__u32 mask;		/* Userland to kernel */
+		__u32 supported;	/* Kernel to userland */
+	};
 	__u32 flags;
 };
 
-- 
2.32.0