netdev - [PATCH] samples: bpf: xdp2: remove duplicate code to find protocol

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Message-Id: <20210808123428.12796-1-falakreyaz@gmail.com>
Date:   Sun,  8 Aug 2021 18:04:28 +0530
From:   Muhammad Falak R Wani <falakreyaz@...il.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        KP Singh <kpsingh@...nel.org>, Yonghong Song <yhs@...com>,
        Song Liu <songliubraving@...com>,
        Martin KaFai Lau <kafai@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org,
        Muhammad Falak R Wani <falakreyaz@...il.com>
Subject: [PATCH] samples: bpf: xdp2: remove duplicate code to find protocol

The code to find h_vlan_encapsulated_proto is duplicated.
Remove the extra block.

Signed-off-by: Muhammad Falak R Wani <falakreyaz@...il.com>
---
 samples/bpf/xdp2_kern.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/samples/bpf/xdp2_kern.c b/samples/bpf/xdp2_kern.c
index c787f4b49646..be4b0c642a6b 100644
--- a/samples/bpf/xdp2_kern.c
+++ b/samples/bpf/xdp2_kern.c
@@ -73,15 +73,6 @@ int xdp_prog1(struct xdp_md *ctx)
 
 	h_proto = eth->h_proto;
 
-	if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) {
-		struct vlan_hdr *vhdr;
-
-		vhdr = data + nh_off;
-		nh_off += sizeof(struct vlan_hdr);
-		if (data + nh_off > data_end)
-			return rc;
-		h_proto = vhdr->h_vlan_encapsulated_proto;
-	}
 	if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) {
 		struct vlan_hdr *vhdr;
 
-- 
2.17.1