Phill Gillespie
2005-Oct-31 09:41 UTC
[Samba] Locking for Linux/WinXP clients (-or- CIFS issues)
Hi...
I've been running samba 3.0 for quite some time now (Debian's stable
version, currently 3.0.14) and I've had no problems. That's probably
been because all my clients were Windows XP boxes. I've now moved
several users to Linux (Ubuntu Breezy) as their desktop and I've noticed
there seems to be a problem in accessing files across the platforms.
If a Linux box opens a file and then another Linux box tries to open the
same file it gets a read-only copy. The same thing happens if an XP box
opens the file and then another XP box tries to open it. If a Linux box
opens a file and then an XP box tries to open it nothing at all happens
and if the XP box has the file open and a Linux box tries to open it I
get a "general input/output error while accessing X" message from
OpenOffice.org.
I though it might be something to do with the oplocks so I tested all
possible combinations and the results stayed exactly as above. The only
thing that changed was the line from smbstatus:
No oplocks, XP opening file:
9868 DENY_WRITE 0x2019f RDWR NONE
No oplocks, Linux opening file:
9871 DENY_NONE 0x12019f RDWR NONE
Level 1 only, XP opening file:
9966 DENY_WRITE 0x2019f RDWR EXCLUSIVE+BATCH
Level 1 only, Linux opening file:
9968 DENY_NONE 0x12019f RDWR EXCLUSIVE
Level 1 and 2 oplocks, XP opening file:
10028 DENY_WRITE 0x2019f RDWR LEVEL_II
Level 1 and 2 oplocks, Linux opening file:
10026 DENY_NONE 0x12019f RDWR EXCLUSIVE (changes to NONE
when a second linux box opens the file and gets Read-Only)
These problems only seemed to start when I added the Linux boxes to my
network as they use CIFS rather than SMBFS (the fstab line is simply
\\Greyskull\Intranet /home/phill/Snipef/Intranet cifs
username=phill,passwd=phill 0 0)
Can somebody please help me change this so I can open a file on one
platform and then be able to open it read-only on the other one.
Thanks in advance for any help,
P h i l l
---
Output from testparam:
Load smb config files from /etc/samba/smb.conf
Processing section "[homes]"
Processing section "[netlogon]"
Processing section "[profiles]"
Processing section "[printers]"
Processing section "[print$]"
Processing section "[finance]"
Processing section "[bpec]"
Processing section "[bpeccolour]"
Processing section "[xerox_top]"
Processing section "[xerox_mid]"
Processing section "[xerox_bot]"
Processing section "[hp_third]"
Processing section "[hp_second]"
Processing section "[Home]"
Processing section "[backup]"
Processing section "[CLS]"
Processing section "[Documents]"
Processing section "[Intranet]"
Processing section "[Mozilla]"
Processing section "[Phill]"
Processing section "[Programmes]"
Processing section "[Temporary]"
Processing section "[Win2k]"
Processing section "[WinXP]"
Processing section "[cdrom]"
Loaded services file OK.
Server role: ROLE_DOMAIN_PDC
Press enter to see a dump of your service definitions
# Global parameters
[global]
workgroup = HE-MAN
server string = Greyskull PDC server
obey pam restrictions = Yes
passdb backend = smbpasswd, guest
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\sUNIX\spassword:* %n\n
*Retype\snew\sUNIX\spassword:* %n\n .
unix password sync = Yes
log level = 2
log file = /var/log/samba/log.%m
max log size = 10000
name resolve order = lmhosts host wins bcast
time server = Yes
printcap name = /etc/printcap
add user script = /usr/local/sbin/add-samba-machine %u
logon script = %m.bat
logon path logon drive = H:
logon home = \\Greyskull\%U
domain logons = Yes
os level = 99
preferred master = Yes
domain master = Yes
wins support = Yes
message command = /bin/sh -c '/usr/bin/linpopup "%f"
"%m" %s; rm
%s' &
panic action = /usr/share/samba/panic-action %d
admin users = root, phill
printer admin = @ntadmin, root, phill
print command = lpr -r -h -P'%p' %s
hide files = /.Trash*/
veto oplock files = /*.sxc/
[homes]
comment = Home Directories
read only = No
create mask = 0700
directory mask = 0700
browseable = No
[netlogon]
comment = Network Logon Service
path = /home/samba/netlogon
guest ok = Yes
nt acl support = No
locking = No
[profiles]
path = /home/profile/
read only = No
create mask = 0600
directory mask = 0700
profile acls = Yes
browseable = No
[printers]
comment = All Printers
path = /var/spool/samba
guest ok = Yes
printable = Yes
browseable = No
[print$]
comment = Printer Drivers
path = /etc/samba/drivers
write list = @ntadmin, root, phill
guest ok = Yes
browseable = No
[finance]
comment = The OKI printer in Finance
path = /var/spool/samba/oki_top
printable = Yes
printer name = oki_top
[bpec]
comment = The OKI printer in BPEC
path = /var/spool/samba/oki_bpec
printable = Yes
printer name = oki_bpec
[bpeccolour]
comment = Epson Colour in BPEC
path = /var/spool/samba/bpeccolour
guest ok = Yes
printable = Yes
printer name = epson_bpec
[xerox_top]
comment = Xerox Top
path = /var/spool/samba/xerox_top
guest ok = Yes
printable = Yes
[xerox_mid]
comment = Xerox Mid
path = /var/spool/samba/xerox_mid
guest ok = Yes
printable = Yes
[xerox_bot]
comment = Xerox Bot
path = /var/spool/samba/xerox_bot
guest ok = Yes
printable = Yes
[hp_third]
comment = HP Third
path = /var/spool/samba/hp_third
guest ok = Yes
printable = Yes
[hp_second]
comment = HP Second
path = /var/spool/samba/hp_second
guest ok = Yes
printable = Yes
[Home]
path = /home
valid users = root, phill, tytus, denisebryson, megator
read only = No
browseable = No
[backup]
path = /backup
valid users = root, phill
read only = No
browseable = No
[CLS]
path = /home/SAMBA/CLS
read only = No
create mask = 0777
force create mode = 0777
force directory mode = 0777
guest only = Yes
guest ok = Yes
browseable = No
[Documents]
path = /home/SAMBA/Documents
read only = No
create mask = 0777
force create mode = 0777
force directory mode = 0777
guest only = Yes
guest ok = Yes
[Intranet]
comment = www folder
path = /var/www
read only = No
create mask = 0775
guest only = Yes
guest ok = Yes
browseable = No
[Mozilla]
path = /samba/Mozilla
read only = No
guest only = Yes
guest ok = Yes
[Phill]
path = /samba/HomePhill
valid users = phill
force user = phill
read only = No
browseable = No
[Programmes]
path = /samba/Programmes
read only = No
guest only = Yes
guest ok = Yes
[Temporary]
path = /samba/Temporary
read only = No
create mask = 0777
force create mode = 0777
force directory mode = 0777
guest ok = Yes
[Win2k]
path = /samba/Windows2k
guest only = Yes
guest ok = Yes
[WinXP]
path = /samba/WindowsXP
guest only = Yes
guest ok = Yes
[cdrom]
comment = Greyskull CD-ROM
path = /cdrom
guest ok = Yes
locking = No
preexec = /bin/mount /cdrom
postexec = /bin/umount /cdrom
Jeremy Allison
2005-Nov-01 01:37 UTC
[Samba] Locking for Linux/WinXP clients (-or- CIFS issues)
On Mon, Oct 31, 2005 at 09:41:04AM +0000, Phill Gillespie wrote:> Hi... > > I've been running samba 3.0 for quite some time now (Debian's stable > version, currently 3.0.14) and I've had no problems. That's probably > been because all my clients were Windows XP boxes. I've now moved > several users to Linux (Ubuntu Breezy) as their desktop and I've noticed > there seems to be a problem in accessing files across the platforms. > > If a Linux box opens a file and then another Linux box tries to open the > same file it gets a read-only copy. The same thing happens if an XP box > opens the file and then another XP box tries to open it. If a Linux box > opens a file and then an XP box tries to open it nothing at all happens > and if the XP box has the file open and a Linux box tries to open it I > get a "general input/output error while accessing X" message from > OpenOffice.org. > > I though it might be something to do with the oplocks so I tested all > possible combinations and the results stayed exactly as above. The only > thing that changed was the line from smbstatus: > > No oplocks, XP opening file: > 9868 DENY_WRITE 0x2019f RDWR NONE > > No oplocks, Linux opening file: > 9871 DENY_NONE 0x12019f RDWR NONE > > Level 1 only, XP opening file: > 9966 DENY_WRITE 0x2019f RDWR EXCLUSIVE+BATCH > > Level 1 only, Linux opening file: > 9968 DENY_NONE 0x12019f RDWR EXCLUSIVE > > Level 1 and 2 oplocks, XP opening file: > 10028 DENY_WRITE 0x2019f RDWR LEVEL_II > > Level 1 and 2 oplocks, Linux opening file: > 10026 DENY_NONE 0x12019f RDWR EXCLUSIVE (changes to NONE > when a second linux box opens the file and gets Read-Only) > > > These problems only seemed to start when I added the Linux boxes to my > network as they use CIFS rather than SMBFS (the fstab line is simply > \\Greyskull\Intranet /home/phill/Snipef/Intranet cifs > username=phill,passwd=phill 0 0) > Can somebody please help me change this so I can open a file on one > platform and then be able to open it read-only on the other one.We need to know how OpenOffice on Linux does the exclusion of "another user has this file open" and how this interacts with a Windows user. Windows apps usually use "share modes" to provide exclusive access, POSIX doesn't have this so it uses byte range locks to do the same thing. Until we know how OO on Linux does this it's hard to speculate as to exactly what is wrong. This is important enough to Novell (who pay my wages :-) that I'll look into this - it's something we just solved for simultaneous access from NetWare and CIFS from Windows clients. Jeremy.