[RFC mptcp-next v3 0/7] NVME over MPTCP

[Geliang Tang <geliang@kernel.org>]

From: Geliang Tang <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.

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.

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.

Depends on: mptcp: fix stall because of data_ready
Without this fix, NVMe-over-MPTCP test will probabilistically fail.
Based-on: <20260209084717.506379-1-gang.yan@linux.dev>

Geliang Tang (7):
  mptcp: add sk_is_msk helper
  nvmet-tcp: add mptcp support
  nvme-tcp: add mptcp support
  mptcp: add sock_set_nodelay
  mptcp: add sock_set_reuseaddr
  mptcp: add sock_set_syncnt
  selftests: mptcp: add NVMe-over-MPTCP test

 drivers/nvme/host/tcp.c                       |  26 ++-
 drivers/nvme/target/configfs.c                |   1 +
 drivers/nvme/target/tcp.c                     |  38 +++-
 include/linux/nvme.h                          |   1 +
 include/net/mptcp.h                           |  27 +++
 net/mptcp/protocol.c                          |  51 +++++
 tools/testing/selftests/net/mptcp/config      |   7 +
 .../testing/selftests/net/mptcp/mptcp_nvme.sh | 179 ++++++++++++++++++
 8 files changed, 327 insertions(+), 3 deletions(-)
 create mode 100755 tools/testing/selftests/net/mptcp/mptcp_nvme.sh

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2.53.0