netdev - [PATCH net-next v2 4/5] net: skbuff: push nf

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Message-Id: <20230417155350.337873-5-kuba@kernel.org>
Date:   Mon, 17 Apr 2023 08:53:49 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
        Jakub Kicinski <kuba@...nel.org>,
        Florian Westphal <fw@...len.de>,
        Florian Fainelli <f.fainelli@...il.com>, pablo@...filter.org
Subject: [PATCH net-next v2 4/5] net: skbuff: push nf_trace down the bitfield

nf_trace is a debug feature, AFAIU, and yet it sits oddly
high in the sk_buff bitfield. Move it down, pushing up
dst_pending_confirm and inner_protocol_type.

Next change will make nf_trace optional (under Kconfig)
and all optional fields should be placed after 2b fields
to avoid 2b fields straddling bytes.

dst_pending_confirm is L3, so it makes sense next to ignore_df.
inner_protocol_type goes up just to keep the balance.

Acked-by: Florian Westphal <fw@...len.de>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: pablo@...filter.org
CC: fw@...len.de
---
 include/linux/skbuff.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 2595b2cfba0d..3ae9e8868afa 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -934,7 +934,7 @@ struct sk_buff {
 	/* public: */
 	__u8			pkt_type:3; /* see PKT_TYPE_MAX */
 	__u8			ignore_df:1;
-	__u8			nf_trace:1;
+	__u8			dst_pending_confirm:1;
 	__u8			ip_summed:2;
 	__u8			ooo_okay:1;
 
@@ -949,7 +949,7 @@ struct sk_buff {
 	__u8			remcsum_offload:1;
 	__u8			csum_complete_sw:1;
 	__u8			csum_level:2;
-	__u8			dst_pending_confirm:1;
+	__u8			inner_protocol_type:1;
 
 	__u8			l4_hash:1;
 	__u8			sw_hash:1;
@@ -967,7 +967,7 @@ struct sk_buff {
 #endif
 
 	__u8			ipvs_property:1;
-	__u8			inner_protocol_type:1;
+	__u8			nf_trace:1;
 #ifdef CONFIG_NET_SWITCHDEV
 	__u8			offload_fwd_mark:1;
 	__u8			offload_l3_fwd_mark:1;
-- 
2.39.2