From: Geliang Tang <tanggeliang@kylinos.cn>

v2:
 - set splice_read of mptcp
 - add a splice selftest.

I have good news! I recently added MPTCP support to "NVME over TCP".
And my RFC patches are under review by NVME maintainer Hannes.

Replacing "NVME over TCP" with MPTCP is very simple. I used IPPROTO_MPTCP
instead of IPPROTO_TCP to create MPTCP sockets on both target and host
sides, these sockets are created in Kernel space.

nvmet_tcp_add_port:

	ret = sock_create(port->addr.ss_family, SOCK_STREAM,
				IPPROTO_MPTCP, &port->sock);

nvme_tcp_alloc_queue:

	ret = sock_create_kern(current->nsproxy->net_ns,
			ctrl->addr.ss_family, SOCK_STREAM,
			IPPROTO_MPTCP, &queue->sock);

nvme_tcp_try_recv() needs to call .read_sock interface of struct
proto_ops, but it is not implemented in MPTCP. So I implemented it
with reference to __mptcp_recvmsg_mskq().

Since the NVME part patches are still under reviewing, I only send the
MPTCP part patches in this set to MPTCP ML for your opinions.

Geliang Tang (4):
  mptcp: use sk_eat_skb in recvmsg_mskq
  mptcp: implement .read_sock
  mptcp: set .splice_read
  selftests: mptcp: add splice test

 net/ipv4/tcp.c                                |   6 +
 net/mptcp/protocol.c                          |  66 +++++-
 tools/testing/selftests/net/mptcp/Makefile    |   2 +-
 .../testing/selftests/net/mptcp/mptcp_join.sh |  20 ++
 .../selftests/net/mptcp/mptcp_splice.c        | 201 ++++++++++++++++++
 5 files changed, 292 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/net/mptcp/mptcp_splice.c

-- 
2.43.0