[PATCH v2 net-next 0/2] RDS-TCP: Network namespace support

From: Sowmini Varadhan
Date: Tue Aug 04 2015 - 01:29:36 EST


This patch series contains the set of changes to correctly set up
the infra for PF_RDS sockets that use TCP as the transport in multiple
network namespaces.

Patch 1 in the series is the minimal set of changes to allow
a single instance of RDS-TCP to run in any (i.e init_net or other) net
namespace. The changes in this patch set ensure that the execution of
'modprobe [-r] rds_tcp' sets up the kernel TCP sockets
relative to the current netns, so that RDS applications can send/recv
packets from that netns, and the netns can later be deleted cleanly.

Patch 2 of the series further allows multiple RDS-TCP instances,
one per network namespace. The changes in this patch allows dynamic
creation/tear-down of RDS-TCP client and server sockets across all
current and future namespaces.

v2 changes from RFC sent out earlier:
David Ahern comments in patch 1, net_device notifier in patch 2,
patch 3 broken off and submitted separately.

Sowmini Varadhan (2):
Make RDS-TCP work correctly when it is set up in a netns other than
init_net
Support multiple RDS-TCP listen endpoints, one per netns.

net/rds/bind.c | 3 +-
net/rds/connection.c | 16 +++--
net/rds/ib.c | 2 +-
net/rds/ib_cm.c | 5 +-
net/rds/iw.c | 2 +-
net/rds/iw_cm.c | 5 +-
net/rds/rds.h | 23 ++++++-
net/rds/send.c | 3 +-
net/rds/tcp.c | 167 +++++++++++++++++++++++++++++++++++++++++++-----
net/rds/tcp.h | 7 ++-
net/rds/tcp_connect.c | 9 ++-
net/rds/tcp_listen.c | 40 ++++--------
net/rds/transport.c | 4 +-
13 files changed, 216 insertions(+), 70 deletions(-)

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