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

["Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de>]

Hi Frank.

----- Original Message -----
> From: "Frank van der Linden" <fllinden@amazon.com>
> To: "linux-nfs" <linux-nfs@vger.kernel.org>, "Anna Schumaker" <anna.schumaker@netapp.com>, "Trond Myklebust"
> <trond.myklebust@hammerspace.com>
> Cc: "Frank van der Linden" <fllinden@amazon.com>
> Sent: Thursday, March 26, 2020 12:10:38 AM
> Subject: [PATCH v2 00/13] NFS client user xattr (RFC8276) support

> 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.

The new patchset looks broken to me.

Client quiryes for supported attributes and gets xattr_support bit set:

Mar 26 11:27:07 ani.desy.de kernel: decode_attr_supported: bitmask=fcffbfff:40fdbe3e:00040800

However, the attribute never queries, but client makes is decision:

Mar 26 11:27:07 ani.desy.de kernel: decode_attr_xattrsupport: XATTR support=false

The packets can be found here: https://sas.desy.de/index.php/s/GEPiBxPg3eR4aGA

Can you provide packets of your mount/umount round.

Regards,
   Tigran.


> * 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