diff options
| author | Dmytro Shytyi <dmytro@shytyi.net> | 2022-11-25 23:29:50 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-29 20:24:25 -0800 |
| commit | dfc8d06030335a816d81aa92fe5d1f84d06998ad (patch) | |
| tree | 648fad954e673b0fc482d240987a2bf7ddb12457 /net/mptcp/options.c | |
| parent | b3ea6b272d79a43baaaa9af871ee66f6fda4688f (diff) | |
mptcp: implement delayed seq generation for passive fastopen
With fastopen in place, the first subflow socket is created before the
MPC handshake completes, and we need to properly initialize the sequence
numbers at MPC ACK reception.
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Dmytro Shytyi <dmytro@shytyi.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index ae076468fcb9..5ded85e2c374 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -939,7 +939,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, subflow->mp_join && (mp_opt->suboptions & OPTIONS_MPTCP_MPJ) && !subflow->request_join) tcp_send_ack(ssk); - goto fully_established; + goto check_notify; } /* we must process OoO packets before the first subflow is fully @@ -950,6 +950,8 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, if (TCP_SKB_CB(skb)->seq != subflow->ssn_offset + 1) { if (subflow->mp_join) goto reset; + if (subflow->is_mptfo && mp_opt->suboptions & OPTION_MPTCP_MPC_ACK) + goto set_fully_established; return subflow->mp_capable; } @@ -961,7 +963,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, */ subflow->fully_established = 1; WRITE_ONCE(msk->fully_established, true); - goto fully_established; + goto check_notify; } /* If the first established packet does not contain MP_CAPABLE + data @@ -980,11 +982,12 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, if (mp_opt->deny_join_id0) WRITE_ONCE(msk->pm.remote_deny_join_id0, true); +set_fully_established: if (unlikely(!READ_ONCE(msk->pm.server_side))) pr_warn_once("bogus mpc option on established client sk"); mptcp_subflow_fully_established(subflow, mp_opt); -fully_established: +check_notify: /* if the subflow is not already linked into the conn_list, we can't * notify the PM: this subflow is still on the listener queue * and the PM possibly acquiring the subflow lock could race with |