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Hi everyone,
at office, we have very strange problems with file locking.
At first, I have to say that we have many different flavours of
Windows running here as clients, it reaches from Windows 98 up to
Windows XP Home Edition/Professional Edition.
The following problem mainly exists with software like AutoCAD (LT
95/2000, 2000, 2003, 2005) and Microsoft Office (95, 97, 2000, XP):
When one client opens a file for writing, lets say an AutoCAD drawing
(*.dwg), Samba sets a DENY_WRITE on that file, sometimes with an
oplock, depending on the client system, the output of smbstatus -L is
the following:
Locked files:
Pid DenyMode Access R/W Oplock Name
- --------------------------------------------------------------
40526 DENY_WRITE 0x2019f RDWR NONE /path/to/
data/somedrawing.dwg Sat Jun 11 14:05:58 2005
After that, a second client (with different username, maybe different
group) opens the same file with the same or a different version of
the same program, after that, the output of smbclient -L is the
following:
Locked files:
Pid DenyMode Access R/W Oplock Name
- --------------------------------------------------------------
40389 DENY_WRITE 0x3 RDWR NONE /path/to/data/
somedrawing.dwg Sat Jun 11 14:06:02 2005
As you can see, the lock has switched the owner, which should not
occur. Additionally, the Access Mode has changed from 0x2019f to 0x3,
whatever this means (I'm not too deep into SMB techs).
The outcome of this whole procedure is, that data is *lost* (one
client opens a file, changes it, second client opens while first is
working, first client saves, second client saves too, work of first
client is lost, etc...). What we wish to have is that p.e. AutoCAD
says - when a second client tries to open a file which has already
been opened by another client - "this file is already being edited.
Cannot open for writing. Open read-only?".
Does anyone have a clue why this is happening? I think it is a really
strange behaviour, since under old NT4, it worked.
Please help, we already lost a good bunch of data due to this problem
named above :(
Thanks anyone for listening; the smb.conf is attached to this mailing!
Best regards,
Ulrik Guenther
=====
smb.conf of server:
[global]
netbios name = SERVER1
workgroup = WORKGROUP
server string = LDAP PDC
ldap passwd sync = yes
passdb backend = ldapsam:ldap://127.0.0.1/
ldap admin dn = cn=Manager,dc=workgroup,dc=local
ldap suffix = dc=workgroup,dc=local
ldap group suffix = ou=Groups
ldap user suffix = ou=Users
ldap machine suffix = ou=Computers
syslog = yes
log file = /data/samba/log/samba.log
os level = 65
preferred master = yes
domain master = yes
local master = yes
security = user
encrypt passwords = yes
domain logons = yes
logon path = \\SERVER1\profiles\%U
logon drive = H:
logon home = \\SERVER1\homes\%U
logon script = netlogon.bat
add user script = /usr/local/sbin/smbldap-useradd -m "%u"
ldap delete dn = yes
add machine script = /usr/local/sbin/smbldap-useradd -w "%u"
add group script = /usr/local/sbin/smbldap-groupadd -p "%g"
add user to group script = /usr/local/sbin/smbldap-groupmod -m "%
u" "%g"
delete user from group script = /usr/local/sbin/smbldap-groupmod -
x "%u" "%g"
set primary group script = /usr/local/sbin/smbldap-usermod -g "%
g" "%u"
dos charset = 850
mangling method = hash2
mangling char = ~
mangle prefix = 6
display charset = ISO8859-1
unix charset = ISO8859-1
admin users = Administrator
printcap name = cups
load printers = yes
[printers]
comment = Drucker
printing = CUPS
printable = yes
create mask = 0600
path = /data/printers
browseable = yes
guest ok = yes
[netlogon]
path = /data/netlogon
comment = Network Logon Service
read only = yes
write list = @"Domain Admins"
browseable = no
guest ok = yes
[profiles]
comment = Nutzerprofile
path = /data/profiles
read only = no
browseable = no
create mask = 0664
directory mask = 0775
profile acls = Yes
guest ok = yes
force user = %U
valid users = %U @"Domain Admins"
[homes]
comment = Dateien von %U (%u)
read only = no
create mask = 0644
directory mask = 0775
browseable = no
[Programme]
path = /data/shares/programme
comment = Programme
read only = no
create mask = 0644
directory mask = 0775
browseable = yes
guest ok = yes
[Daten]
path = /data/shares/daten
comment = Daten
read only = no
create mask = 0664
directory mask = 0775
browseable = yes
guest ok = no
valid users = %U @"Domain Users" @"Domain Admins"
oplocks = no
[Admin]
path = /data/shares/admin
comment = administrative Freigabe
read only = no
create mask = 0644
directory mask = 0775
browseable = yes
guest ok = no
valid users = %U @"Domain Admins"
force group = "Domain Admins"
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