[PATCH v8 00/18] nfs/nfsd: add support for localio

[Mike Snitzer <snitzer@kernel.org>]

Hi,

Changes since v7:
- Switched from using SRCU to percpu_ref to interlock
  nfsd_destroy_serv() and nfsd_open_local_fh().
- Dropped the "nfs/localio: use dedicated workqueues for filesystem
  read and write" patch, will revisit if/when needed based on evidence
- Changed NFSD_MAY_LOCALIO from 0x800000 to 0x2000.
- Various renames in fs/nfsd/localio.c XDR code suggested by Chuck. 
- Fixed localio_procedures1 and ARRAY_SIZE  suggested by Neil.
- Fixed nfsd_uuid_is_local() to dereference nfsd_uuid within rcu
- Removed a few dprintk in fs/{nfs,nfsd}/localio.c
- Documentation improvements suggested by Jeff.

TODO:
- Must fix xfstests generic/355 (clear suid bit on write)
- Must fix localio's nfs_get_vfs_attr() to support NFS v4 same as is
  done with nfsd4_change_attribute(). But first attempt to do so was
  met with a crash due to the extra STATX_BTIME | STATX_CHANGE_COOKIE
  being included in the request_mask passed to vfs_getattr().

All review and comments are welcome!

Thanks,
Mike

My git tree is here:
https://git.kernel.org/pub/scm/linux/kernel/git/snitzer/linux.git/

This v8 is both branch nfs-localio-for-6.11 (always tracks latest)
and nfs-localio-for-6.11.v8

Mike Snitzer (10):
  nfs_common: add NFS LOCALIO auxiliary protocol enablement
  nfsd: add "localio" support
  nfsd/localio: manage netns reference in nfsd_open_local_fh
  nfsd: use percpu_ref to interlock nfsd_destroy_serv and nfsd_open_local_fh
  nfs/nfsd: add Kconfig options to allow localio to be enabled
  nfs: factor out {encode,decode}_opaque_fixed to nfs_xdr.h
  SUNRPC: remove call_allocate() BUG_ON if p_arglen=0 to allow RPC with void arg
  nfs: implement client support for NFS_LOCALIO_PROGRAM
  nfsd: implement server support for NFS_LOCALIO_PROGRAM
  nfs: add Documentation/filesystems/nfs/localio.rst

NeilBrown (1):
  SUNRPC: replace program list with program array

Trond Myklebust (2):
  NFS: Enable localio for non-pNFS I/O
  pnfs/flexfiles: Enable localio for flexfiles I/O

Weston Andros Adamson (5):
  nfs: pass nfs_client to nfs_initiate_pgio
  nfs: pass descriptor thru nfs_initiate_pgio path
  nfs: pass struct file to nfs_init_pgio and nfs_init_commit
  sunrpc: add rpcauth_map_to_svc_cred_local
  nfs: add "localio" support

 Documentation/filesystems/nfs/localio.rst | 135 ++++
 fs/Kconfig                                |   3 +
 fs/nfs/Kconfig                            |  14 +
 fs/nfs/Makefile                           |   1 +
 fs/nfs/blocklayout/blocklayout.c          |   6 +-
 fs/nfs/client.c                           |  15 +-
 fs/nfs/filelayout/filelayout.c            |  16 +-
 fs/nfs/flexfilelayout/flexfilelayout.c    | 131 +++-
 fs/nfs/flexfilelayout/flexfilelayout.h    |   2 +
 fs/nfs/flexfilelayout/flexfilelayoutdev.c |   6 +
 fs/nfs/inode.c                            |   4 +
 fs/nfs/internal.h                         |  60 +-
 fs/nfs/localio.c                          | 793 ++++++++++++++++++++++
 fs/nfs/nfs4xdr.c                          |  13 -
 fs/nfs/nfstrace.h                         |  61 ++
 fs/nfs/pagelist.c                         |  32 +-
 fs/nfs/pnfs.c                             |  24 +-
 fs/nfs/pnfs.h                             |   6 +-
 fs/nfs/pnfs_nfs.c                         |   2 +-
 fs/nfs/write.c                            |  13 +-
 fs/nfs_common/Makefile                    |   3 +
 fs/nfs_common/nfslocalio.c                |  74 ++
 fs/nfsd/Kconfig                           |  14 +
 fs/nfsd/Makefile                          |   1 +
 fs/nfsd/filecache.c                       |   2 +-
 fs/nfsd/localio.c                         | 329 +++++++++
 fs/nfsd/netns.h                           |  12 +-
 fs/nfsd/nfsctl.c                          |   2 +-
 fs/nfsd/nfsd.h                            |   2 +-
 fs/nfsd/nfssvc.c                          | 116 +++-
 fs/nfsd/trace.h                           |   3 +-
 fs/nfsd/vfs.h                             |   9 +
 include/linux/nfs.h                       |   9 +
 include/linux/nfs_fs.h                    |   2 +
 include/linux/nfs_fs_sb.h                 |  10 +
 include/linux/nfs_xdr.h                   |  20 +-
 include/linux/nfslocalio.h                |  41 ++
 include/linux/sunrpc/auth.h               |   4 +
 include/linux/sunrpc/svc.h                |   7 +-
 net/sunrpc/auth.c                         |  15 +
 net/sunrpc/clnt.c                         |   1 -
 net/sunrpc/svc.c                          |  68 +-
 net/sunrpc/svc_xprt.c                     |   2 +-
 net/sunrpc/svcauth_unix.c                 |   3 +-
 44 files changed, 1951 insertions(+), 135 deletions(-)
 create mode 100644 Documentation/filesystems/nfs/localio.rst
 create mode 100644 fs/nfs/localio.c
 create mode 100644 fs/nfs_common/nfslocalio.c
 create mode 100644 fs/nfsd/localio.c
 create mode 100644 include/linux/nfslocalio.h

-- 
2.44.0