[RFC mptcp-next v6 0/7] NVME over MPTCP

[Geliang Tang <geliang@kernel.org>]

From: Geliang Tang <tanggeliang@kylinos.cn>

v6:
 - introduce nvmet_tcp_sockops and nvme_tcp_sockops structures
 - fix set_reuseaddr, set_nodelay and set_syncnt, add sockopt_seq_inc
 calls, only set the first subflow, and synchronize to other subflows in
 sync_socket_options
 - Add implementations for no_linger, set_priority and set_tos
 - This version no longer depends on the "mptcp: fix stall because of
 data_ready" series of fixes

v5:
 - address comments reported by ai-review: set msk->nodelay to true in
   mptcp_sock_set_nodelay, set sk->sk_reuse to ssk->sk_reuse in
   mptcp_sock_set_reuseaddr, add mptcp_nvme.sh to TEST_PROGS, and adjust
   the order of patches.
 - remove TLS-related options from .allowed_opts of
   nvme_mptcp_transport.
 - some cleanups for selftest.
 - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1773374342.git.tanggeliang@kylinos.cn/

v4:
 - a new patch to set nvme iopolicy as Nilay suggested.
 - resend all set to trigger AI review.
 - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1772683110.git.tanggeliang@kylinos.cn/

v3:
 - update the implementation of sock_set_nodelay: originally it only set
the first subflow, but now it sets every subflow.
 - use sk_is_msk helper in this set.
 - update the selftest to perform testing under a multi-interface
environment.
 - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1770627071.git.tanggeliang@kylinos.cn/

v2:
 - Patch 1 fixes the timeout issue reported in v1, thanks to Paolo and Gang
Yan for their help.
 - Patch 5 implements an MPTCP-specific sock_set_syncnt helper.
 - Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1764152990.git.tanggeliang@kylinos.cn/

This series (previously named "MPTCP support to 'NVME over TCP'") had three
RFC versions sent to Hannes in May, with subsequent revisions based on his
input. Following that, I initiated the process of upstreaming the dependent
"implement mptcp read_sock" series to the main MPTCP repository, which has
been merged into net-next recently.

Geliang Tang (7):
  nvmet-tcp: define target tcp_sockops struct
  nvmet-tcp: implement target mptcp sockops
  nvmet-tcp: register target mptcp transport
  nvme-tcp: define host tcp_sockops struct
  nvme-tcp: implement host mptcp sockops
  nvme-tcp: register host mptcp transport
  selftests: mptcp: add NVMe over MPTCP test

 drivers/nvme/host/tcp.c                       |  66 +++++-
 drivers/nvme/target/configfs.c                |   1 +
 drivers/nvme/target/tcp.c                     |  79 ++++++-
 include/linux/nvme.h                          |   1 +
 include/net/mptcp.h                           |  27 +++
 net/mptcp/protocol.h                          |   1 +
 net/mptcp/sockopt.c                           | 120 ++++++++++
 tools/testing/selftests/net/mptcp/Makefile    |   1 +
 tools/testing/selftests/net/mptcp/config      |   7 +
 .../testing/selftests/net/mptcp/mptcp_nvme.sh | 205 ++++++++++++++++++
 10 files changed, 494 insertions(+), 14 deletions(-)
 create mode 100755 tools/testing/selftests/net/mptcp/mptcp_nvme.sh

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2.51.0