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Date: Mon, 12 Nov 2018 18:27:14 +0800
From: Xin Long <lucien.xin@...il.com>
To: network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org
Cc: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
Neil Horman <nhorman@...driver.com>, davem@...emloft.net
Subject: [PATCHv2 net-next 0/3] sctp: add support for sk_reuseport
sctp sk_reuseport allows multiple socks to listen on the same port and
addresses, as long as these socks have the same uid. This works pretty
much as TCP/UDP does, the only difference is that sctp is multi-homing
and all the bind_addrs in these socks will have to completely matched,
otherwise listen() will return err.
The below is when 5 sockets are listening on 172.16.254.254:6400 on a
server, 26 sockets on a client connect to 172.16.254.254:6400 and each
may be processed by a different socket on the server which is selected
by hash(lport, pport, paddr) in reuseport_select_sock():
# ss --sctp -nn
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 10 172.16.254.254:6400 *:*
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.2.1:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.2.4:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.3.3:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.3.4:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.5.2:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.5.3:1234
LISTEN 0 10 172.16.254.254:6400 *:*
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.1.3:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.1.4:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.3.2:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.4.1:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.4.2:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.4.3:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.4.4:1234
LISTEN 0 10 172.16.254.254:6400 *:*
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.1.2:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.3.5:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.4.5:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.253.253:1234
LISTEN 0 10 172.16.254.254:6400 *:*
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.2.2:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.2.3:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.5.4:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.5.5:1234
LISTEN 0 10 172.16.254.254:6400 *:*
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.1.1:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.1.5:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.2.5:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.3.1:1234
`- ESTAB 0 0 172.16.254.254%eth1:6400 172.16.5.1:1234
Xin Long (3):
sctp: do reuseport_select_sock in __sctp_rcv_lookup_endpoint
sctp: add sock_reuseport for the sock in __sctp_hash_endpoint
sctp: process sk_reuseport in sctp_get_port_local
include/net/sctp/sctp.h | 2 +-
include/net/sctp/structs.h | 6 ++-
net/core/sock_reuseport.c | 1 +
net/sctp/bind_addr.c | 28 ++++++++++
net/sctp/input.c | 129 ++++++++++++++++++++++++++++++++-------------
net/sctp/socket.c | 49 +++++++++++------
6 files changed, 162 insertions(+), 53 deletions(-)
--
2.1.0
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