RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket

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Add per-net sysctl tunables to set the size of sndbuf and
rcvbuf on the kernel tcp socket.

The tunables are added at /proc/sys/net/rds/tcp/rds_tcp_sndbuf
and /proc/sys/net/rds/tcp/rds_tcp_rcvbuf.

These values must be set before accept() or connect(),
and there may be an arbitrary number of existing rds-tcp
sockets when the tunable is modified. To make sure that all
connections in the netns pick up the same value for the tunable,
we reset existing rds-tcp connections in the netns, so that
they can reconnect with the new parameters.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Sowmini Varadhan 2016-03-16 11:38:12 -07:00 • committed by David S. Miller

parent 79d3b59a93

commit c6a58ffed5

1 changed files with 135 additions and 10 deletions

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net/rds/tcp.c

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