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bpf: Add SO_RCVBUF/SO_SNDBUF in _bpf_getsockopt().

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This patch exposes SO_RCVBUF/SO_SNDBUF through bpf_getsockopt().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220104013153.97906-3-kuniyu@amazon.co.jp
This commit is contained in:
Kuniyuki Iwashima 2022-01-04 10:31:49 +09:00 committed by Alexei Starovoitov
parent 04c350b1ae
commit 28479934f2
1 changed files with 6 additions and 0 deletions
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6
net/core/filter.c
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@ -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;