From d9ff286a0f59fa7843549e49bd240393dd7d8b87 Mon Sep 17 00:00:00 2001
From: Eric Dumazet
Date: Wed, 23 Jan 2019 09:22:27 -0800
Subject: bpf: allow BPF programs access skb_shared_info->gso_segs field

This adds the ability to read gso_segs from a BPF program.

v3: Use BPF_REG_AX instead of BPF_REG_TMP for the temporary register,
    as suggested by Martin.

v2: refined Eddie Hao patch to address Alexei feedback.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Eddie Hao <eddieh@google.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 include/uapi/linux/bpf.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/uapi/linux/bpf.h')

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 91c43884f295..2940a9854f6d 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -2540,6 +2540,7 @@ struct __sk_buff {
 	__bpf_md_ptr(struct bpf_flow_keys *, flow_keys);
 	__u64 tstamp;
 	__u32 wire_len;
+	__u32 gso_segs;
 };
 
 struct bpf_tunnel_key {
-- 
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