netdev - [PATCH bpf-next 2/6] bpf: Add SO_RCVBUF/SO_SNDBUF in _bpf

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Date:   Tue, 4 Jan 2022 10:31:49 +0900
From:   Kuniyuki Iwashima <kuniyu@...zon.co.jp>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
CC:     Martin KaFai Lau <kafai@...com>,
        Benjamin Herrenschmidt <benh@...zon.com>,
        Kuniyuki Iwashima <kuniyu@...zon.co.jp>,
        Kuniyuki Iwashima <kuni1840@...il.com>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>
Subject: [PATCH bpf-next 2/6] bpf: Add SO_RCVBUF/SO_SNDBUF in _bpf_getsockopt().

This patch exposes SO_RCVBUF/SO_SNDBUF through bpf_getsockopt().

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.co.jp>
---
 net/core/filter.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index 368fe28c8dc6..cac2be559ab0 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4969,6 +4969,12 @@ static int _bpf_getsockopt(struct sock *sk, int level, int optname,
 			goto err_clear;
 
 		switch (optname) {
+		case SO_RCVBUF:
+			*((int *)optval) = sk->sk_rcvbuf;
+			break;
+		case SO_SNDBUF:
+			*((int *)optval) = sk->sk_sndbuf;
+			break;
 		case SO_MARK:
 			*((int *)optval) = sk->sk_mark;
 			break;
-- 
2.30.2