[PATCH mptcp-net v5 0/5] mptcp: fix stall because of data_ready

[Gang Yan <gang.yan@linux.dev>]

From: Gang Yan <yangang@kylinos.cn>

Changelog:
V5:
  - Patch 1 fixes missing initialization of msk->backlog_unaccounted in
    __mptcp_init_sock() to match the commit message.
  - Patch 4 removes the 'else' branch to fix potential TOCTOU race and
    fix typo in title.
  - Patch 5 drops the redundant tcp_rmem restore.
  - Add notes in some patches of the series in response to the AI
    review.
v4:
  - Pass 'delta' to 'move_skbs_to_msk' to fix the potential problems,
    and add a helper named 'move_skbs_from_backlog' to achieve this.
  - Add a test case in mptcp_join.sh which can reproduce such stall
    prolems.
  - Fix a dead_lock problems which is imported in the 1d77124a6322
    ('mptcp: fix the stall problems with data_ready.').
v3:
  - Replace backlog list with backlog_queue(rb-tree) to solve the
    stall problems.
  Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1773735950.git.yangang@kylinos.cn/
v2:
  Link: https://patchwork.kernel.org/project/mptcp/patch/20260209084717.506379-1-gang.yan@linux.dev/
 v1:
  Link: https://patchwork.kernel.org/project/mptcp/cover/cover.1770273341.git.yangang@kylinos.cn/


Gang Yan (5):
  mptcp: replace backlog_list with backlog_queue
  mptcp: fix the stall problems using backlog_queue
  mptcp: fix the stall problems with data_ready
  mptcp: fix the dead_lock in mptcp_data_ready
  selftests: mptcp: test transmission with small rcvbuf

 net/mptcp/protocol.c                          | 110 +++++++++++++++---
 net/mptcp/protocol.h                          |   2 +-
 .../testing/selftests/net/mptcp/mptcp_join.sh |  17 +++
 3 files changed, 112 insertions(+), 17 deletions(-)

-- 
2.43.0