[PATCH v2 00/13] NFS client user xattr (RFC8276) support

[Frank van der Linden <fllinden@amazon.com>]

v1 is here: https://www.spinics.net/lists/linux-nfs/msg76740.html

v2:

* Move nfs4 specific definitions to nfs_fs4.h
* Squash some patches together to avoid unused function warnings
  when bisecting.
* Made determining server support a two-step process. First,
  the extended attribute FATTR is verified to be supported, then
  the value of the attributed is queried in fsinfo to determine
  support.
* Fixed up Makefile to remove an unneeded extra line.

This was tested as before (using my own stress tests), but also
with xfstests-dev. No issues were found, but xfstests needs some
fixes to correctly run the applicable xattr tests on NFS. I
have those changes, but need to send them out.

I also tested stress-ng-xattr with 1000 workers on the client
side, running for 8 hours without problems (except for noting
that the session tbl_lock can become quite hot when doing
NFS operations by 1000 threads, but that's a separate issue).


Frank van der Linden (13):
  nfs,nfsd:  NFSv4.2 extended attribute protocol definitions
  nfs: add client side only definitions for user xattrs
  NFSv4.2: define limits and sizes for user xattr handling
  NFSv4.2: query the server for extended attribute support
  NFSv4.2: add client side XDR handling for extended attributes
  nfs: define nfs_access_get_cached function
  NFSv4.2: query the extended attribute access bits
  nfs: modify update_changeattr to deal with regular files
  nfs: define and use the NFS_INO_INVALID_XATTR flag
  nfs: make the buf_to_pages_noslab function available to the nfs code
  NFSv4.2: add the extended attribute proc functions.
  NFSv4.2: hook in the user extended attribute handlers
  NFSv4.2: add client side xattr caching.

 fs/nfs/Makefile             |    2 +-
 fs/nfs/client.c             |   22 +-
 fs/nfs/dir.c                |   24 +-
 fs/nfs/inode.c              |   16 +-
 fs/nfs/nfs42.h              |   24 +
 fs/nfs/nfs42proc.c          |  248 ++++++++
 fs/nfs/nfs42xattr.c         | 1083 +++++++++++++++++++++++++++++++++++
 fs/nfs/nfs42xdr.c           |  438 ++++++++++++++
 fs/nfs/nfs4_fs.h            |   35 ++
 fs/nfs/nfs4client.c         |   31 +
 fs/nfs/nfs4proc.c           |  237 +++++++-
 fs/nfs/nfs4super.c          |   10 +
 fs/nfs/nfs4xdr.c            |   31 +
 fs/nfs/nfstrace.h           |    3 +-
 include/linux/nfs4.h        |   25 +
 include/linux/nfs_fs.h      |   12 +
 include/linux/nfs_fs_sb.h   |    6 +
 include/linux/nfs_xdr.h     |   60 +-
 include/uapi/linux/nfs4.h   |    3 +
 include/uapi/linux/nfs_fs.h |    1 +
 20 files changed, 2269 insertions(+), 42 deletions(-)
 create mode 100644 fs/nfs/nfs42xattr.c

-- 
2.17.2