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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Norman Maurer <norman_maurer@apple.com>,
        David Ahern <dsahern@kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 140/188] net: udp: Add support for getsockopt(..., ..., UDP_GRO, ..., ...);
Date:   Mon, 12 Apr 2021 10:40:54 +0200
Message-Id: <20210412084018.291305997@linuxfoundation.org>
In-Reply-To: <20210412084013.643370347@linuxfoundation.org>
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From: Norman Maurer <norman_maurer@apple.com>

[ Upstream commit 98184612aca0a9ee42b8eb0262a49900ee9eef0d ]

Support for UDP_GRO was added in the past but the implementation for
getsockopt was missed which did lead to an error when we tried to
retrieve the setting for UDP_GRO. This patch adds the missing switch
case for UDP_GRO

Fixes: e20cf8d3f1f7 ("udp: implement GRO for plain UDP sockets.")
Signed-off-by: Norman Maurer <norman_maurer@apple.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/ipv4/udp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index e37a2fa65c29..4a2fd286787c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2747,6 +2747,10 @@ int udp_lib_getsockopt(struct sock *sk, int level, int optname,
 		val = up->gso_size;
 		break;
 
+	case UDP_GRO:
+		val = up->gro_enabled;
+		break;
+
 	/* The following two cannot be changed on UDP sockets, the return is
 	 * always 0 (which corresponds to the full checksum coverage of UDP). */
 	case UDPLITE_SEND_CSCOV:
-- 
2.30.2