linux-kernel - [RFC v2 Optimizing veth xsk performance 7/9] sk_buff: add destructor_arg_xsk

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Message-Id: <20230807122549.85841-1-huangjie.albert@bytedance.com>
Date:   Mon,  7 Aug 2023 20:25:45 +0800
From:   Albert Huang <huangjie.albert@...edance.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Albert Huang <huangjie.albert@...edance.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Pavel Begunkov <asml.silence@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Kees Cook <keescook@...omium.org>,
        Richard Gobert <richardbgobert@...il.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC v2 Optimizing veth xsk performance 7/9] sk_buff: add destructor_arg_xsk_pool for zero copy

this member is add for dummy dev to suppot zero copy

Signed-off-by: Albert Huang <huangjie.albert@...edance.com>
---
 include/linux/skbuff.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 16a49ba534e4..db999056022e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -592,6 +592,8 @@ struct skb_shared_info {
 	/* Intermediate layers must ensure that destructor_arg
 	 * remains valid until skb destructor */
 	void *		destructor_arg;
+	/* just for dummy device xsk zero copy */
+	void		*destructor_arg_xsk_pool;
 
 	/* must be last field, see pskb_expand_head() */
 	skb_frag_t	frags[MAX_SKB_FRAGS];
-- 
2.20.1