From: Mat Martineau <mathew.j.martineau@linux.intel.com>
To: netdev@vger.kernel.org
Cc: Paolo Abeni <pabeni@redhat.com>,
davem@davemloft.net, kuba@kernel.org,
matthieu.baerts@tessares.net, mptcp@lists.linux.dev,
Mat Martineau <mathew.j.martineau@linux.intel.com>
Subject: [PATCH net-next 4/5] mptcp: optimize the input options processing
Date: Thu, 26 Aug 2021 17:44:53 -0700 [thread overview]
Message-ID: <20210827004455.286754-5-mathew.j.martineau@linux.intel.com> (raw)
In-Reply-To: <20210827004455.286754-1-mathew.j.martineau@linux.intel.com>
From: Paolo Abeni <pabeni@redhat.com>
Most MPTCP packets carries a single MPTCP subption: the
DSS containing the mapping for the current packet.
Check explicitly for the above, so that is such scenario we
replace most conditional statements with a single likely() one.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
---
net/mptcp/options.c | 71 +++++++++++++++++++++++----------------------
1 file changed, 37 insertions(+), 34 deletions(-)
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 0d33c020062f..f5fa8e7efd9c 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -1111,48 +1111,51 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
if (!check_fully_established(msk, sk, subflow, skb, &mp_opt))
return sk->sk_state != TCP_CLOSE;
- if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) &&
- msk->local_key == mp_opt.rcvr_key) {
- WRITE_ONCE(msk->rcv_fastclose, true);
- mptcp_schedule_work((struct sock *)msk);
- }
+ if (unlikely(mp_opt.suboptions != OPTION_MPTCP_DSS)) {
+ if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) &&
+ msk->local_key == mp_opt.rcvr_key) {
+ WRITE_ONCE(msk->rcv_fastclose, true);
+ mptcp_schedule_work((struct sock *)msk);
+ }
- if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) && add_addr_hmac_valid(msk, &mp_opt)) {
- if (!mp_opt.echo) {
- mptcp_pm_add_addr_received(msk, &mp_opt.addr);
- MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR);
- } else {
- mptcp_pm_add_addr_echoed(msk, &mp_opt.addr);
- mptcp_pm_del_add_timer(msk, &mp_opt.addr, true);
- MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ECHOADD);
+ if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) &&
+ add_addr_hmac_valid(msk, &mp_opt)) {
+ if (!mp_opt.echo) {
+ mptcp_pm_add_addr_received(msk, &mp_opt.addr);
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR);
+ } else {
+ mptcp_pm_add_addr_echoed(msk, &mp_opt.addr);
+ mptcp_pm_del_add_timer(msk, &mp_opt.addr, true);
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ECHOADD);
+ }
+
+ if (mp_opt.addr.port)
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD);
}
- if (mp_opt.addr.port)
- MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD);
- }
+ if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR)
+ mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list);
- if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR)
- mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list);
+ if (mp_opt.suboptions & OPTION_MPTCP_PRIO) {
+ mptcp_pm_mp_prio_received(sk, mp_opt.backup);
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX);
+ }
- if (mp_opt.suboptions & OPTION_MPTCP_PRIO) {
- mptcp_pm_mp_prio_received(sk, mp_opt.backup);
- MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX);
- }
+ if (mp_opt.suboptions & OPTION_MPTCP_FAIL) {
+ mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq);
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX);
+ }
- if (mp_opt.suboptions & OPTION_MPTCP_FAIL) {
- mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq);
- MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX);
- }
+ if (mp_opt.suboptions & OPTION_MPTCP_RST) {
+ subflow->reset_seen = 1;
+ subflow->reset_reason = mp_opt.reset_reason;
+ subflow->reset_transient = mp_opt.reset_transient;
+ }
- if (mp_opt.suboptions & OPTION_MPTCP_RST) {
- subflow->reset_seen = 1;
- subflow->reset_reason = mp_opt.reset_reason;
- subflow->reset_transient = mp_opt.reset_transient;
+ if (!(mp_opt.suboptions & OPTION_MPTCP_DSS))
+ return true;
}
- if (!(mp_opt.suboptions & OPTION_MPTCP_DSS))
- return true;
-
/* we can't wait for recvmsg() to update the ack_seq, otherwise
* monodirectional flows will stuck
*/
@@ -1179,7 +1182,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
memset(mpext, 0, sizeof(*mpext));
- if (mp_opt.use_map) {
+ if (likely(mp_opt.use_map)) {
if (mp_opt.mpc_map) {
/* this is an MP_CAPABLE carrying MPTCP data
* we know this map the first chunk of data
--
2.33.0
next prev parent reply other threads:[~2021-08-27 0:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-27 0:44 [PATCH net-next 0/5] mptcp: Optimize received options handling Mat Martineau
2021-08-27 0:44 ` [PATCH net-next 1/5] mptcp: do not set unconditionally csum_reqd on incoming opt Mat Martineau
2021-08-27 0:44 ` [PATCH net-next 2/5] mptcp: better binary layout for mptcp_options_received Mat Martineau
2021-08-27 0:44 ` [PATCH net-next 3/5] mptcp: consolidate in_opt sub-options fields in a bitmask Mat Martineau
2021-08-27 0:44 ` Mat Martineau [this message]
2021-08-27 0:44 ` [PATCH net-next 5/5] mptcp: make the locking tx schema more readable Mat Martineau
2021-08-27 9:10 ` [PATCH net-next 0/5] mptcp: Optimize received options handling patchwork-bot+netdevbpf
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