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Subject: [PATCH 2 00/14] NFSD backchannel fixes
From: Chuck Lever <cel@kernel.org>
To: linux-nfs@vger.kernel.org
Date: Fri, 26 Jan 2024 12:45:10 -0500
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The first four patches fix bugs that prevent NFSD's backchannel
from reliably retransmitting after a client reconnects.

Following that are some new trace points that might be helpful for
field troubleshooting.

Then there are some minor clean-ups.

Changes since RFC:
- Replace the msleep with queue_delayed_work
- Refinements to patch descriptions

---

Chuck Lever (14):
      NFSD: Reset cb_seq_status after NFS4ERR_DELAY
      NFSD: Convert the callback workqueue to use delayed_work
      NFSD: Reschedule CB operations when backchannel rpc_clnt is shut down
      NFSD: Retransmit callbacks after client reconnects
      NFSD: Add nfsd_seq4_status trace event
      NFSD: Replace dprintks in nfsd4_cb_sequence_done()
      NFSD: Rename nfsd_cb_state trace point
      NFSD: Add callback operation lifetime trace points
      SUNRPC: Remove EXPORT_SYMBOL_GPL for svc_process_bc()
      NFSD: Remove unused @reason argument
      NFSD: Replace comment with lockdep assertion
      NFSD: Remove BUG_ON in nfsd4_process_cb_update()
      SUNRPC: Remove stale comments
      NFSD: Remove redundant cb_seq_status initialization


 fs/nfsd/nfs4callback.c   |  94 +++++++++++++++--------
 fs/nfsd/nfs4state.c      |   1 +
 fs/nfsd/state.h          |   2 +-
 fs/nfsd/trace.h          | 162 ++++++++++++++++++++++++++++++++++++++-
 include/trace/misc/nfs.h |  34 ++++++++
 net/sunrpc/svc.c         |   1 -
 net/sunrpc/xprtsock.c    |   9 ---
 7 files changed, 261 insertions(+), 42 deletions(-)

--
Chuck Lever