netdev - RE: [PATCH net-next 3/6] flow_offload: add flow_rule_no_control

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Date: Tue, 9 Apr 2024 02:09:41 +0000
From: Baowen Zheng <baowen.zheng@...igine.com>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>, "David S.
 Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub
 Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Louis Peens
	<louis.peens@...igine.com>, Taras Chornyi <taras.chornyi@...ision.eu>,
	Woojung Huh <woojung.huh@...rochip.com>, "UNGLinuxDriver@...rochip.com"
	<UNGLinuxDriver@...rochip.com>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Yanguo Li
	<yanguo.li@...hogine.com>, oss-drivers <oss-drivers@...igine.com>, Andrew
 Lunn <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>, Vladimir
 Oltean <olteanv@...il.com>, Edward Cree <ecree.xilinx@...il.com>, Jamal Hadi
 Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko
	<jiri@...nulli.us>
Subject: RE: [PATCH net-next 3/6] flow_offload: add
 flow_rule_no_control_flags()

On April 8, 2024 9:09 PM, Asbjørn wrote:

>This helper can be used by drivers, that doesn't support any control flags, to
>reject any attempt to install rules with control flags.
>
>This is aimed at drivers, which uses flow_rule_match_control(), but doesn't
>implement any control flags.
>
>Only compile-tested.
>
>Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
>---
> include/net/flow_offload.h | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
>diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h index
>c1317b14da08c..415d225204a1f 100644
>--- a/include/net/flow_offload.h
>+++ b/include/net/flow_offload.h
>@@ -471,6 +471,19 @@ static inline bool
>flow_rule_no_unsupp_control_flags(const u32 supp_flags,
> 	return false;
> }
>
>+/**
>+ * flow_rule_no_control_flags() - check for presence of any control
>+flags
>+ * @flags: flags present in rule
>+ * @extack: The netlink extended ACK for reporting errors.
>+ *
>+ * Returns true if no control flags are set, false otherwise.
>+ */
>+static inline bool flow_rule_no_control_flags(const u32 flags,
>+					      struct netlink_ext_ack *extack) {
>+	return flow_rule_no_unsupp_control_flags(0, flags, extack); }
>+
How about to squash this change with series I patch since they have similar functions for driver to use.
> struct flow_stats {
> 	u64	pkts;
> 	u64	bytes;
>--
>2.43.0