[Samba] NFS re-export 64bit / 32bit locking issue?

[Thomas Hannan]

Hi all,

I've got kind of strange setup, wherein all of my data is on a big NFS
server (RH linux 8.0 running the 2.4.18 kernel and nfs-utils 1.0.1-2.80)
and my Samba 3.0.0 PDC server (RH linux 7.3 w/ 2.4.18 kernel, nfs-utils
0.3.3-6.73) mounts the NFS export with the following options:
rw,vers=3,wsize=8192,rsize=8192,hard,intr

This mounted partition is then re-exported to the windows users with the
following smb.conf:

[global]
	workgroup = POI
	netbios name = POI-US
	server string = "POI-USA file server"
	passdb backend = ldapsam:ldap://192.168.1.215 ldap://192.168.1.60
	guest account = smbguest
	log level = 3
	log file = /var/log/samba/%m.log
	time server = Yes
	socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=16384
SO_SNDBUF=16384
	logon script = poi-basic.bat
	logon path = \\%L\Profiles\%U
	logon drive = H:
	logon home = \\%L\%U\.profiles
	domain logons = Yes
	os level = 34
	preferred master = Yes
	domain master = Yes
	wins support = Yes
	ldap suffix = ou=accounts,ou=people,dc=pharm-olam,dc=com
	ldap machine suffix =
ou=machines,ou=accounts,ou=people,dc=pharm-olam,dc=com
	ldap user suffix = ou=users,ou=accounts,ou=people,dc=pharm-olam,dc=com
	ldap group suffix =
ou=groups,ou=accounts,ou=people,dc=pharm-olam,dc=com
	ldap idmap suffix = ou=accounts,ou=people,dc=pharm-olam,dc=com
	ldap admin dn = cn=Manager,dc=pharm-olam,dc=com
	ldap ssl = no

[homes]
	read only = No
	create mask = 0600
	directory mask = 0700

[profiles]
	path = /var/archive/samba/profiles
	read only = No
	create mask = 0600
	directory mask = 0700
	browseable = No


[POIAdmin]
	comment = POI Administrative files
	path = /var/archive/export/POI-Administrative
	write list = poi-admin
	read only = No
	create mask = 0660
	directory mask = 0770
	oplocks = No
	level2 oplocks = No


[netlogon]
	path = /var/archive/samba/netlogon
	locking = No


Everything works except that when users try to run QuickBooks or open up
some Excel documents, it is very very very slow opening them up, and
they occasionally get errors saying that a document could possibly be
corrupted or that they are low on memory, when only 10% of the windows
client's memory is used.

On the Samba server, I get a ton of error messages complaining about
trying to get a 64 bit lock when only 32 bit locks are available. I've
tried enabling and disabling oplocks to no avail. Is there a way to get
samba to not advertise that 64bit locks are available, or otherwise
resolve this?

Thanks much,
Thomas

(logs are below):
[2004/01/22 16:31:13, 3] lib/util.c:fcntl_lock(1632)
  fcntl_lock: fcntl lock gave errno 37 (No locks available)
[2004/01/22 16:31:13, 3] lib/util.c:fcntl_lock(1650)
  fcntl_lock: lock failed at offset 687 count 1 op 13 type 0 (No locks
available
)
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(656)
  posix_fcntl_lock: WARNING: lock request at offset 687, length 1
returned
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(658)
  an No locks available error. This can happen when using 64 bit lock
offsets
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(659)
  on 32 bit NFS mounted file systems.
[2004/01/22 16:31:13, 3] smbd/error.c:error_packet(94)
  error string = No locks available
[2004/01/22 16:31:13, 3] smbd/error.c:error_packet(109)
  error packet at smbd/reply.c(4208) cmd=36 (SMBlockingX)
NT_STATUS_ACCESS_DENIE
D
[2004/01/22 16:31:13, 3] smbd/process.c:process_smb(890)
  Transaction 41744 of length 63
[2004/01/22 16:31:13, 3] smbd/process.c:switch_message(685)
  switch message SMBreadX (pid 4473)
[2004/01/22 16:31:13, 3] smbd/reply.c:send_file_readX(1846)
  send_file_readX fnum=6397 max=1 nread=1
[2004/01/22 16:31:13, 3] smbd/process.c:process_smb(890)
  Transaction 41745 of length 75
[2004/01/22 16:31:13, 3] smbd/process.c:switch_message(685)
  switch message SMBlockingX (pid 4473)
[2004/01/22 16:31:13, 3] lib/util.c:fcntl_lock(1632)
  fcntl_lock: fcntl lock gave errno 37 (No locks available)
[2004/01/22 16:31:13, 3] lib/util.c:fcntl_lock(1650)
  fcntl_lock: lock failed at offset 688 count 1 op 13 type 0 (No locks
available
)
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(656)
  posix_fcntl_lock: WARNING: lock request at offset 688, length 1
returned
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(658)
  an No locks available error. This can happen when using 64 bit lock
offsets
[2004/01/22 16:31:13, 0] locking/posix.c:posix_fcntl_lock(659)
  on 32 bit NFS mounted file systems.
[2004/01/22 16:31:13, 3] smbd/error.c:error_packet(94)
  error string = No locks available
[2004/01/22 16:31:13, 3] smbd/error.c:error_packet(109)
  error packet at smbd/reply.c(4208) cmd=36 (SMBlockingX)
NT_STATUS_ACCESS_DENIE
D