6.6-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
[ Upstream commit 724b00c12957973656d312dce2a110c75ae2c680 ]
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@redhat.com Signed-off-by: Eric Dumazet edumazet@google.com Reviewed-by: Simon Horman horms@kernel.org Acked-by: Paolo Abeni pabeni@redhat.com Reviewed-by: Mat Martineau martineau@kernel.org Fixes: 74c7dfbee3e1 ("mptcp: consolidate in_opt sub-options fields in a bitmask") Link: https://lore.kernel.org/r/20240111194917.4044654-6-edumazet@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 93f43a5cce40..70b7a47a53c7 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) {