Re: NFSv4 uninitialized mtime

[Stuart Anderson <anderson@ligo.caltech.edu>]

On Wed, Jun 27, 2007 at 10:30:22PM -0500, Spencer Shepler wrote:
> 
> On Jun 27, 2007, at 10:23 PM, Stuart Anderson wrote:
> 
> >On Wed, Jun 27, 2007 at 10:09:23PM -0500, Spencer Shepler wrote:
> >>>Somewhat related is the reason that we are tring NFSV4 on Linux
> >>>clients is
> >>>that with NFSV3 ACL's do not work between Linux and Solaris if the
> >>>filesystem
> >>>on the Solaris server is ZFS, e.g., cp -p will generate interesting
> >>>error
> >>>messages. While I would rather stay with NFSV4 if possible, has  
> >>>anyone
> >>>gotten this configuration to work with V3?
> >>
> >>It will not.  ZFS does not support the "old" ACL definition; only
> >>NFSv4 support.
> >>
> >
> >Understood, so this is probably not a bug and just a feature, but why
> >does a Linux client try and then generate application level errors?
> >A Solaris client is willing to NFS mount vers=3 a ZFS filesystem  
> >and then
> >run GNU cp -rp, for example, without complaint. Perhaps there is a  
> >simple
> >method determine if ACL's are available/supported on a particular NFS
> >mount?
> 
> Does it fail on the "get" or "set" of the ACL?

set

Here is an strace snippet from running cp -rp on a Linux NFSV3 client
of a Solaris 10 ZFS server:

getxattr("test1/oink", "system.posix_acl_access", "\x02\x00\x00\x00\x01\x00\x06\x00\xff\xff\xff\xff\x04\x00\x04\x00\xff\xff\xff\xff\x10\x00\x07\x00\xff\xff\xff\xff \x00\x04\x00\xff\xff\xff\xff", 132) = 36
setxattr("test2/oink", "system.posix_acl_access", "\x02\x00\x00\x00\x01\x00\x06\x00\xff\xff\xff\xff\x04\x00\x04\x00\xff\xff\xff\xff\x10\x00\x07\x00\xff\xff\xff\xff \x00\x04\x00\xff\xff\xff\xff", 36, 0) = -1 EINVAL (Invalid argument)

We used to have this same problem with Linux NFSV3 mounts from Solaris QFS servers
as well, but that was fixed in a recent update to QFS, so I am not really sure
who is "responsible" for bridging ACL's between the old/new schemes.

Thanks.


-- 
Stuart Anderson  anderson@ligo.caltech.edu
http://www.ligo.caltech.edu/~anderson

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