netdev - [RFC PATCH 3/7] net: sched: Add members to qdisc_skb

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Date: Sun,  8 Oct 2023 14:20:47 +0900
From: Akihiko Odaki <akihiko.odaki@...nix.com>
To: 
Cc: Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	Jason Wang <jasowang@...hat.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Xuan Zhuo Shuah Khan <"xuanzhuo@...ux.alibaba.comshuah"@kernel.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	linux-kselftest@...r.kernel.org, bpf@...r.kernel.org,
	davem@...emloft.net, kuba@...nel.org, ast@...nel.org,
	daniel@...earbox.net, andrii@...nel.org, kafai@...com,
	songliubraving@...com, yhs@...com, john.fastabend@...il.com,
	kpsingh@...nel.org, rdunlap@...radead.org, willemb@...gle.com,
	gustavoars@...nel.org, herbert@...dor.apana.org.au,
	steffen.klassert@...unet.com, nogikh@...gle.com, pablo@...filter.org,
	decui@...rosoft.com, cai@....pw, jakub@...udflare.com,
	elver@...gle.com, pabeni@...hat.com,
	Yuri Benditovich <yuri.benditovich@...nix.com>,
	Akihiko Odaki <akihiko.odaki@...nix.com>
Subject: [RFC PATCH 3/7] net: sched: Add members to qdisc_skb_cb

The new members will be used to deliver virtio-net hash information by
tun. The other members are also reordered so that the overall size will
not change.

Signed-off-by: Akihiko Odaki <akihiko.odaki@...nix.com>
---
 include/net/sch_generic.h | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index f232512505f8..9dfdc63859c7 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -430,13 +430,15 @@ struct tcf_proto {
 };
 
 struct qdisc_skb_cb {
-	struct {
-		unsigned int		pkt_len;
-		u16			slave_dev_queue_mapping;
-		u16			tc_classid;
-	};
 #define QDISC_CB_PRIV_LEN 20
 	unsigned char		data[QDISC_CB_PRIV_LEN];
+	unsigned int		pkt_len;
+	u16			slave_dev_queue_mapping;
+	union {
+		u16		tc_classid;
+		u16		tun_vnet_hash_report;
+	};
+	u32			tun_vnet_hash_value;
 };
 
 typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv);
-- 
2.42.0