netdev - [Patch bpf-next v5 3/4] skmsg: save some space in struct sk

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Message-Id: <20251228002219.1183459-4-xiyou.wangcong@gmail.com>
Date: Sat, 27 Dec 2025 16:22:18 -0800
From: Cong Wang <xiyou.wangcong@...il.com>
To: netdev@...r.kernel.org
Cc: hemanthmalla@...il.com,
	john.fastabend@...il.com,
	jakub@...udflare.com,
	bpf@...r.kernel.org,
	Cong Wang <cong.wang@...edance.com>
Subject: [Patch bpf-next v5 3/4] skmsg: save some space in struct sk_psock

From: Cong Wang <cong.wang@...edance.com>

This patch aims to save some space in struct sk_psock and prepares for
the next patch which will add more fields.

psock->eval can only have 4 possible values, make it 8-bit is
sufficient.

psock->redir_ingress is just a boolean, using 1 bit is enough.

Reviewed-by: John Fastabend <john.fastabend@...il.com>
Signed-off-by: Cong Wang <cong.wang@...edance.com>
---
 include/linux/skmsg.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h
index 61e2c2e6840b..99ef5d501b8f 100644
--- a/include/linux/skmsg.h
+++ b/include/linux/skmsg.h
@@ -85,8 +85,8 @@ struct sk_psock {
 	struct sock			*sk_redir;
 	u32				apply_bytes;
 	u32				cork_bytes;
-	u32				eval;
-	bool				redir_ingress; /* undefined if sk_redir is null */
+	u8				eval;
+	u8 				redir_ingress : 1; /* undefined if sk_redir is null */
 	struct sk_msg			*cork;
 	struct sk_psock_progs		progs;
 #if IS_ENABLED(CONFIG_BPF_STREAM_PARSER)
-- 
2.34.1