netdev - [PATCH v9 bpf-next 01/14] net: skbuff: add data_len field to skb_shared

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Message-Id: <8ad0d38259a678fb42245368f974f1a5cf47d68d.1623674025.git.lorenzo@kernel.org>
Date:   Mon, 14 Jun 2021 14:49:39 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     bpf@...r.kernel.org, netdev@...r.kernel.org
Cc:     lorenzo.bianconi@...hat.com, davem@...emloft.net, kuba@...nel.org,
        ast@...nel.org, daniel@...earbox.net, shayagr@...zon.com,
        sameehj@...zon.com, john.fastabend@...il.com, dsahern@...nel.org,
        brouer@...hat.com, echaudro@...hat.com, jasowang@...hat.com,
        alexander.duyck@...il.com, saeed@...nel.org,
        maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
        tirthendu.sarkar@...el.com
Subject: [PATCH v9 bpf-next 01/14] net: skbuff: add data_len field to skb_shared_info

data_len field will be used for paged frame len for xdp_buff/xdp_frame.
This is a preliminary patch to properly support xdp-multibuff

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 include/linux/skbuff.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index dbf820a50a39..332ec56c200d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -522,7 +522,10 @@ struct skb_shared_info {
 	struct sk_buff	*frag_list;
 	struct skb_shared_hwtstamps hwtstamps;
 	unsigned int	gso_type;
-	u32		tskey;
+	union {
+		u32	tskey;
+		u32	data_len;
+	};
 
 	/*
 	 * Warning : all fields before dataref are cleared in __alloc_skb()
-- 
2.31.1