[PATCH 0/4] add to support for virtio-user server mode

[Zhiyong Yang <zhiyong.yang@intel.com>]

When vhost user/ovs-dpdk restart, virtio user is expected to keep alive
so that vhost user can reconnect it successfully and continue to exchange
packets.

The series support the feature and target for 18.05 release.

Virtio user with server mode creates socket file and then starts to wait
for first connection from vhost user with client mode in blocking mode.

Virtio user with server mode supports many times' vhost reconnections with
same configurations. 

Virtio user supports only one connection at the same time in server/client
mode.

How to test?
for example:

./x86_64-native-linuxapp-gcc/app/testpmd -c 0x3 -n 4 -m 256,0 --no-pci \
--file-prefix=testpmd0 --vdev=net_virtio_user0,mac=00:11:22:33:44:10, \
path=/tmp/sock0,server=1,queues=1 -- -i --rxq=1 --txq=1 --no-numa

./x86_64-native-linuxapp-gcc/app/testpmd -c 0x3e000 -n 4 --socket-mem 256,0 \
--vdev 'net_vhost0,iface=/tmp/sock0,client=0,queues=1' -- -i --rxq=1 --txq=1 \
--nb-cores=1 --no-numa

Zhiyong Yang (4):
  vhost: move fdset functions from fd_man.c to fd_man.h
  net/virtio-user: add data members to support server mode
  net/virtio-user: support server mode
  net/vhost: add memory checking to support client mode

 drivers/net/vhost/rte_eth_vhost.c                |   9 +
 drivers/net/virtio/virtio_ethdev.c               |   9 +-
 drivers/net/virtio/virtio_user/vhost_user.c      |  77 ++++++-
 drivers/net/virtio/virtio_user/virtio_user_dev.c |  44 ++--
 drivers/net/virtio/virtio_user/virtio_user_dev.h |   8 +
 drivers/net/virtio/virtio_user_ethdev.c          |  81 ++++++-
 lib/librte_vhost/Makefile                        |   3 +-
 lib/librte_vhost/fd_man.c                        | 274 -----------------------
 lib/librte_vhost/fd_man.h                        | 258 ++++++++++++++++++++-
 9 files changed, 456 insertions(+), 307 deletions(-)
 delete mode 100644 lib/librte_vhost/fd_man.c

-- 
2.13.3