[PATCH v6 0/5] NFSv4.2: Various READ_PLUS fixes

[Anna Schumaker <anna@kernel.org>]

From: Anna Schumaker <Anna.Schumaker@Netapp.com>

These patches are a handul of fixes I've done recently to the READ_PLUS
code. This includes fixing some smatch warnings, fixing the XDR reply
length calculation, improving scratch buffer handling, and having
xdr_inline_decode() kmap pages if we detect that they're HIGHMEM so we
don't oops during READ_PLUS xdr decoding.

I also (optimistically) have a patch at the end to enable
CONFIG_READ_PLUS by default. My hope right now is that we can enable
READ_PLUS for Linux 6.6, and remove it entirely in 6.7 if all goes well.

Thoughts? Patch #4 probably needs the most review, and I'm open to other
approaches if something else makes more sense!

Thanks,
Anna

Anna Schumaker (5):
  NFSv4.2: Fix READ_PLUS smatch warnings
  NFSv4.2: Fix READ_PLUS size calculations
  NFSv4.2: Rework scratch handling for READ_PLUS (again)
  SUNRPC: kmap() the xdr pages during decode
  NFS: Enable the READ_PLUS operation by default

 fs/nfs/Kconfig             |  6 ++----
 fs/nfs/internal.h          |  1 +
 fs/nfs/nfs42.h             |  1 +
 fs/nfs/nfs42xdr.c          | 17 +++++++++++------
 fs/nfs/nfs4proc.c          | 13 +------------
 fs/nfs/read.c              | 10 ++++++++++
 include/linux/sunrpc/xdr.h |  3 +++
 net/sunrpc/clnt.c          |  1 +
 net/sunrpc/svc.c           |  2 ++
 net/sunrpc/xdr.c           | 27 ++++++++++++++++++++++++++-
 10 files changed, 58 insertions(+), 23 deletions(-)

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2.41.0