linux-kernel - [PATCH] ipv4, bpf: Introduced to support the ULP to modify sockets during setopt

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Message-ID: <20250121080547.3159934-1-zhangmingyi5@huawei.com>
Date: Tue, 21 Jan 2025 16:05:47 +0800
From: zhangmingyi <zhangmingyi5@...wei.com>
To: <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
	<martin.lau@...ux.dev>, <song@...nel.org>, <yhs@...com>,
	<john.fastabend@...il.com>, <kpsingh@...nel.org>, <sdf@...gle.com>,
	<haoluo@...gle.com>, <jolsa@...nel.org>
CC: <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <yanan@...wei.com>,
	<wuchangye@...wei.com>, <xiesongyang@...wei.com>, <liuxin350@...wei.com>,
	<liwei883@...wei.com>, <tianmuyang@...wei.com>, <zhangmingyi5@...wei.com>
Subject: [PATCH] ipv4, bpf: Introduced to support the ULP to modify sockets during setopt

Note that tcp_getsockopt and tcp_setsockopt support TCP_ULP, while
bpf_getsockopt and bpf_setsockopt do not support TCP_ULP.
I think we can add the handling of this case.

Signed-off-by: zhangmingyi <zhangmingyi5@...wei.com>
---
 net/core/filter.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index 713d6f454df3..f23d3f87e690 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5383,6 +5383,10 @@ static int sol_tcp_sockopt(struct sock *sk, int optname,
 		if (*optlen < 1)
 			return -EINVAL;
 		break;
+	case TCP_ULP:
+		if (getopt)
+			return -EINVAL;
+		break;
 	case TCP_BPF_SOCK_OPS_CB_FLAGS:
 		if (*optlen != sizeof(int))
 			return -EINVAL;
-- 
2.43.0