[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240111194917.4044654-6-edumazet@google.com>
Date: Thu, 11 Jan 2024 19:49:17 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Matthieu Baerts <matttbe@...nel.org>, Mat Martineau <martineau@...nel.org>,
Geliang Tang <geliang.tang@...ux.dev>, Florian Westphal <fw@...len.de>, netdev@...r.kernel.org,
eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 5/5] mptcp: refine opt_mp_capable determination
OPTIONS_MPTCP_MPC is a combination of three flags.
It would be better to be strict about testing what
flag is expected, at least for code readability.
mptcp_parse_option() already makes the distinction.
- subflow_check_req() should use OPTION_MPTCP_MPC_SYN.
- mptcp_subflow_init_cookie_req() should use OPTION_MPTCP_MPC_ACK.
- subflow_finish_connect() should use OPTION_MPTCP_MPC_SYNACK
- subflow_syn_recv_sock should use OPTION_MPTCP_MPC_ACK
Suggested-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
net/mptcp/subflow.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 13039ac8d1ab641fb9b22b621ac011e6a7bc9e37..1117d1e84274a5ea1ede990566f67c0073fd86a0 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -157,7 +157,7 @@ static int subflow_check_req(struct request_sock *req,
mptcp_get_options(skb, &mp_opt);
- opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
+ opt_mp_capable = !!(mp_opt.suboptions & OPTION_MPTCP_MPC_SYN);
opt_mp_join = !!(mp_opt.suboptions & OPTION_MPTCP_MPJ_SYN);
if (opt_mp_capable) {
SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE);
@@ -254,7 +254,7 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req,
subflow_init_req(req, sk_listener);
mptcp_get_options(skb, &mp_opt);
- opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
+ opt_mp_capable = !!(mp_opt.suboptions & OPTION_MPTCP_MPC_ACK);
opt_mp_join = !!(mp_opt.suboptions & OPTION_MPTCP_MPJ_ACK);
if (opt_mp_capable && opt_mp_join)
return -EINVAL;
@@ -486,7 +486,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
mptcp_get_options(skb, &mp_opt);
if (subflow->request_mptcp) {
- if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) {
+ if (!(mp_opt.suboptions & OPTION_MPTCP_MPC_SYNACK)) {
MPTCP_INC_STATS(sock_net(sk),
MPTCP_MIB_MPCAPABLEACTIVEFALLBACK);
mptcp_do_fallback(sk);
@@ -783,7 +783,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
* options.
*/
mptcp_get_options(skb, &mp_opt);
- if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC))
+ if (!(mp_opt.suboptions & OPTION_MPTCP_MPC_ACK))
fallback = true;
} else if (subflow_req->mp_join) {
--
2.43.0.275.g3460e3d667-goog
Powered by blists - more mailing lists