[Samba] Samba locking fails over NFS

[Darren Gamble]

Good day,

Our Windows users aren't able to edit their MS Office files over our Samba shares (Samba 3.0.10, CentOS4 w/ their i386 RPM).  It looks like the clients' attempts to lock the files fails.  When their client attempts to open such a file, Samba reports:

----------8<-----------------------
[2006/10/27 15:55:57, 0] locking/posix.c:posix_fcntl_lock(657)
  posix_fcntl_lock: WARNING: lock request at offset 2147483538, length 1 returned
[2006/10/27 15:55:57, 0] locking/posix.c:posix_fcntl_lock(658)
  an No locks available error. This can happen when using 64 bit lock offsets
[2006/10/27 15:55:57, 0] locking/posix.c:posix_fcntl_lock(659)
  on 32 bit NFS mounted file systems.
----------8<-----------------------


The filesystem the file is on is indeed a NFS filesystem mounted from a Netapp device, although I have no idea if Samba tried a 64-bit lock.  The machine and Samba binary are 32-bit, although I am guessing Samba thinks it's supposed to use 64-bit locks.

But, I have no idea how to actually fix this problem.  I've found lots of posts with people with this issue, and a couple others describing the details of the problem and why it happens, but none actually resolving it- other than one suggestion to set "locking no", which is obviously not desirable at all!

Can someone suggest how this could be resolved?  Thanks!

============================
Darren Gamble
Systems Architect, Regional Services
Shaw Cablesystems GP
630 - 3rd Avenue SW
Calgary, Alberta, Canada
T2P 4L4
(403) 781-4948