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261501d94e
Xin Long says: ==================== 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 ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.