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Message-Id: <20240301-upstream-net-next-20240301-mptcp-tcp_notsent_lowat-v1-4-415f0e8ed0e1@kernel.org>
Date: Fri, 01 Mar 2024 18:43:47 +0100
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: mptcp@...ts.linux.dev, Mat Martineau <martineau@...nel.org>,
Geliang Tang <geliang@...nel.org>, "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
"Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Subject: [PATCH net-next 4/4] mptcp: cleanup SOL_TCP handling
From: Paolo Abeni <pabeni@...hat.com>
Most TCP-level socket options get an integer from user space, and
set the corresponding field under the msk-level socket lock.
Reduce the code duplication moving such operations in the common code.
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Reviewed-by: Mat Martineau <martineau@...nel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
net/mptcp/sockopt.c | 75 +++++++++++++++++++++--------------------------------
1 file changed, 30 insertions(+), 45 deletions(-)
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index 1b38dac70719..dcd1c76d2a3b 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -624,18 +624,11 @@ static int mptcp_setsockopt_sol_tcp_congestion(struct mptcp_sock *msk, sockptr_t
return ret;
}
-static int mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, sockptr_t optval,
- unsigned int optlen)
+static int __mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, int val)
{
struct mptcp_subflow_context *subflow;
struct sock *sk = (struct sock *)msk;
- int val, ret;
- ret = mptcp_get_int_option(msk, optval, optlen, &val);
- if (ret)
- return ret;
-
- lock_sock(sk);
sockopt_seq_inc(msk);
msk->cork = !!val;
mptcp_for_each_subflow(msk, subflow) {
@@ -647,23 +640,15 @@ static int mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, sockptr_t optva
}
if (!val)
mptcp_check_and_set_pending(sk);
- release_sock(sk);
return 0;
}
-static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t optval,
- unsigned int optlen)
+static int __mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, int val)
{
struct mptcp_subflow_context *subflow;
struct sock *sk = (struct sock *)msk;
- int val, ret;
- ret = mptcp_get_int_option(msk, optval, optlen, &val);
- if (ret)
- return ret;
-
- lock_sock(sk);
sockopt_seq_inc(msk);
msk->nodelay = !!val;
mptcp_for_each_subflow(msk, subflow) {
@@ -675,8 +660,6 @@ static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t op
}
if (val)
mptcp_check_and_set_pending(sk);
- release_sock(sk);
-
return 0;
}
@@ -799,35 +782,10 @@ static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
int ret, val;
switch (optname) {
- case TCP_INQ:
- ret = mptcp_get_int_option(msk, optval, optlen, &val);
- if (ret)
- return ret;
- if (val < 0 || val > 1)
- return -EINVAL;
-
- lock_sock(sk);
- msk->recvmsg_inq = !!val;
- release_sock(sk);
- return 0;
case TCP_ULP:
return -EOPNOTSUPP;
- case TCP_NOTSENT_LOWAT:
- ret = mptcp_get_int_option(msk, optval, optlen, &val);
- if (ret)
- return ret;
-
- lock_sock(sk);
- WRITE_ONCE(msk->notsent_lowat, val);
- mptcp_write_space(sk);
- release_sock(sk);
- return 0;
case TCP_CONGESTION:
return mptcp_setsockopt_sol_tcp_congestion(msk, optval, optlen);
- case TCP_CORK:
- return mptcp_setsockopt_sol_tcp_cork(msk, optval, optlen);
- case TCP_NODELAY:
- return mptcp_setsockopt_sol_tcp_nodelay(msk, optval, optlen);
case TCP_DEFER_ACCEPT:
/* See tcp.c: TCP_DEFER_ACCEPT does not fail */
mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, optval, optlen);
@@ -840,7 +798,34 @@ static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
optval, optlen);
}
- return -EOPNOTSUPP;
+ ret = mptcp_get_int_option(msk, optval, optlen, &val);
+ if (ret)
+ return ret;
+
+ lock_sock(sk);
+ switch (optname) {
+ case TCP_INQ:
+ if (val < 0 || val > 1)
+ ret = -EINVAL;
+ else
+ msk->recvmsg_inq = !!val;
+ break;
+ case TCP_NOTSENT_LOWAT:
+ WRITE_ONCE(msk->notsent_lowat, val);
+ mptcp_write_space(sk);
+ break;
+ case TCP_CORK:
+ ret = __mptcp_setsockopt_sol_tcp_cork(msk, val);
+ break;
+ case TCP_NODELAY:
+ ret = __mptcp_setsockopt_sol_tcp_nodelay(msk, val);
+ break;
+ default:
+ ret = -ENOPROTOOPT;
+ }
+
+ release_sock(sk);
+ return ret;
}
int mptcp_setsockopt(struct sock *sk, int level, int optname,
--
2.43.0
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