[Samba] Strange problem with MS Office while saving
Gionatan Danti
g.danti at assyoma.it
Wed Oct 28 18:18:15 UTC 2015
Hi all,
I sometime have a strange behavior when using MS Office and saving
files.
First things first:
- OS CentOS 6.7 x86_64
- SAMBA version 3.6.23, configured as member server (see [1] for full
configuration)
- inotifywait watching my shares to replicate them off-site
- about 100 W7/W8 clients with MS Office 2010
Using inotifywait, I tracked how MS Office file save function works.
Basically, when clicking on the "diskette" icon, Office do the following
thing:
- create a temporary file with the new content (AAAAAAAA.tmp)
- rename the original file (text.xls) to a new temporary name
(BBBBBBBB.tmp)
- rename the first temporary file (AAAAAAAA.tmp) to the original
filename (test.xls)
- delete the second temporary file (BBBBBBBB.tmp)
The above renaming valzer works flawlessy 99.9% of times, but sometime
it "hang" at point n.3 - renaming the first temporary file to the
original filename. Using inotifywait, I see something similar:
- create a temporary file with the new content (AAAAAAAA.tmp)
- rename the original file (text.xls) to a new temporary name
(BBBBBBBB.tmp)
- <nothing>
- delete the second temporary file (BBBBBBBB.tmp)
The net results is that the user "lose" a file, because it can't see any
file with the original filename and the on-disk temporary file tell it
nothing (its name being randomly generated).
Knowing that the inotify stack can lose events, I enabled samba log and
searched for something related. Sadly, samba logs perfectly mirror what
inotifywait shown: the first temporary file rename is never executed
(nor it reached the samba server).
Any ideas on what is happening here?
I searched the list, but found nothing related.
Thanks.
[1] testparm -vvv output:
Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit
(16384)
Processing section "[DATI]"
Processing section "[EDP]"
Processing section "[UTILITY]"
Processing section "[ARCHIVE]"
Loaded services file OK.
Server role: ROLE_DOMAIN_MEMBER
Press enter to see a dump of your service definitions
[global]
dos charset = CP850
unix charset = UTF-8
display charset = LOCALE
workgroup = EXAMPLE
realm = EXAMPLE
netbios name = FSX
netbios aliases =
netbios scope =
server string = Samba Server Version %v
interfaces =
bind interfaces only = No
security = ADS
auth methods =
encrypt passwords = Yes
client schannel = Auto
server schannel = Auto
allow trusted domains = Yes
map to guest = Never
null passwords = No
obey pam restrictions = No
password server = *
smb passwd file = /var/lib/samba/private/smbpasswd
private dir = /var/lib/samba/private
passdb backend = tdbsam
algorithmic rid base = 1000
root directory =
guest account = nobody
enable privileges = Yes
pam password change = No
passwd program =
passwd chat = *new*password* %n\n *new*password* %n\n *changed*
passwd chat debug = No
passwd chat timeout = 2
check password script =
username map =
password level = 0
username level = 0
unix password sync = No
restrict anonymous = 0
lanman auth = No
ntlm auth = Yes
client NTLMv2 auth = Yes
client lanman auth = No
client plaintext auth = No
client use spnego principal = No
send spnego principal = No
preload modules =
dedicated keytab file =
kerberos method = secrets and keytab
map untrusted to domain = No
log level = 2
syslog = 1
syslog only = No
log file = /var/log/samba/log.%m
max log size = 5000
debug timestamp = Yes
debug prefix timestamp = No
debug hires timestamp = Yes
debug pid = No
debug uid = No
debug class = No
enable core files = Yes
smb ports = 445 139
large readwrite = Yes
max protocol = NT1
min protocol = CORE
min receivefile size = 0
read raw = Yes
write raw = Yes
disable netbios = No
reset on zero vc = No
log writeable files on exit = No
acl compatibility = auto
defer sharing violations = Yes
nt pipe support = Yes
nt status support = Yes
announce version = 4.9
announce as = NT
max mux = 50
max xmit = 16644
name resolve order = lmhosts wins host bcast
max ttl = 259200
max wins ttl = 518400
min wins ttl = 21600
time server = No
unix extensions = No
use spnego = Yes
client signing = auto
server signing = No
client use spnego = Yes
client ldap sasl wrapping = plain
enable asu support = No
svcctl list =
deadtime = 10
getwd cache = Yes
keepalive = 300
lpq cache time = 30
max smbd processes = 0
paranoid server security = Yes
max disk size = 0
max open files = 16384
socket options = TCP_NODELAY SO_KEEPALIVE
use mmap = Yes
hostname lookups = No
name cache timeout = 660
ctdbd socket =
cluster addresses =
clustering = No
ctdb timeout = 0
ctdb locktime warn threshold = 0
smb2 max read = 65536
smb2 max write = 65536
smb2 max trans = 65536
smb2 max credits = 8192
load printers = Yes
printcap cache time = 750
printcap name =
cups server =
cups encrypt = No
cups connection timeout = 30
iprint server =
disable spoolss = No
addport command =
enumports command =
addprinter command =
deleteprinter command =
show add printer wizard = Yes
os2 driver map =
mangling method = hash2
mangle prefix = 1
max stat cache size = 256
stat cache = Yes
machine password timeout = 604800
add user script =
rename user script =
delete user script =
add group script =
delete group script =
add user to group script =
delete user from group script =
set primary group script =
add machine script =
shutdown script =
abort shutdown script =
username map script =
username map cache time = 0
logon script =
logon path = \\%N\%U\profile
logon drive =
logon home = \\%N\%U
domain logons = No
init logon delayed hosts =
init logon delay = 100
os level = 20
lm announce = Auto
lm interval = 60
preferred master = No
local master = Yes
domain master = Auto
browse list = Yes
enhanced browsing = Yes
dns proxy = Yes
wins proxy = No
wins server =
wins support = No
wins hook =
kernel oplocks = Yes
lock spin time = 200
oplock break wait time = 0
ldap admin dn =
ldap delete dn = No
ldap group suffix =
ldap idmap suffix =
ldap machine suffix =
ldap passwd sync = no
ldap replication sleep = 1000
ldap suffix =
ldap ssl = start tls
ldap ssl ads = No
ldap deref = auto
ldap follow referral = Auto
ldap timeout = 15
ldap connection timeout = 2
ldap page size = 1024
ldap user suffix =
ldap debug level = 0
ldap debug threshold = 10
eventlog list =
add share command =
change share command =
delete share command =
preload =
lock directory = /var/lib/samba
state directory = /var/lib/samba
cache directory = /var/lib/samba
pid directory = /var/run
utmp directory =
wtmp directory =
utmp = No
default service =
message command =
get quota command =
set quota command =
remote announce =
remote browse sync =
socket address = 0.0.0.0
nmbd bind explicit broadcast = Yes
homedir map = auto.home
afs username map =
afs token lifetime = 604800
log nt token command =
time offset = 0
NIS homedir = No
registry shares = No
usershare allow guests = No
usershare max shares = 0
usershare owner only = Yes
usershare path = /var/lib/samba/usershares
usershare prefix allow list =
usershare prefix deny list =
usershare template share =
allow insecure wide links = No
async smb echo handler = No
multicast dns register = Yes
panic action =
perfcount module =
host msdfs = Yes
passdb expand explicit = No
idmap backend = tdb
idmap cache time = 604800
idmap negative cache time = 120
idmap uid =
idmap gid =
template homedir = /home/%D/%U
template shell = /bin/false
winbind separator = \
winbind cache time = 300
winbind reconnect delay = 30
winbind max clients = 200
winbind enum users = Yes
winbind enum groups = Yes
winbind use default domain = No
winbind trusted domains only = No
winbind nested groups = Yes
winbind expand groups = 1
winbind nss info = template
winbind refresh tickets = No
winbind offline logon = No
winbind normalize names = No
winbind rpc only = No
create krb5 conf = Yes
ncalrpc dir = /var/ncalrpc
winbind max domain connections = 1
idmap config EXAMPLE : range = 2000000-2999999
idmap config EXAMPLE : backend = rid
idmap config * : range = 10544-10554
idmap config * : backend = tdb
comment =
path =
username =
invalid users =
valid users =
admin users =
read list =
write list =
printer admin =
force user =
force group =
read only = Yes
acl check permissions = Yes
acl group control = No
acl map full control = Yes
create mask = 0744
force create mode = 00
security mask = 0777
force security mode = 00
directory mask = 0755
force directory mode = 00
directory security mask = 0777
force directory security mode = 00
force unknown acl user = No
inherit permissions = No
inherit acls = No
inherit owner = No
guest only = No
administrative share = No
guest ok = No
only user = No
hosts allow =
hosts deny =
allocation roundup size = 1048576
aio read size = 0
aio write size = 0
aio write behind =
ea support = No
nt acl support = Yes
profile acls = No
map acl inherit = Yes
afs share = No
smb encrypt = auto
block size = 1024
change notify = Yes
directory name cache size = 100
kernel change notify = Yes
max connections = 0
min print space = 0
strict allocate = No
strict sync = No
sync always = No
use sendfile = No
write cache size = 0
max reported print jobs = 0
max print jobs = 1000
printable = No
print notify backchannel = Yes
print ok = No
printing = cups
cups options = raw
print command =
lpq command = %p
lprm command =
lppause command =
lpresume command =
queuepause command =
queueresume command =
printer name =
use client driver = No
default devmode = Yes
force printername = No
printjob username = %U
default case = lower
case sensitive = Auto
preserve case = Yes
short preserve case = Yes
mangling char = ~
hide dot files = Yes
hide special files = No
hide unreadable = No
hide unwriteable files = No
delete veto files = Yes
veto files = /____archive____/Thumbs.db/
hide files =
veto oplock files =
map archive = Yes
map hidden = No
map system = No
map readonly = yes
mangled names = Yes
store dos attributes = Yes
dmapi support = No
browseable = Yes
access based share enum = No
blocking locks = Yes
csc policy = manual
fake oplocks = No
locking = Yes
oplocks = Yes
level2 oplocks = Yes
oplock contention limit = 2
posix locking = Yes
strict locking = Auto
share modes = Yes
dfree cache time = 0
dfree command =
copy =
preexec =
preexec close = No
postexec =
root preexec =
root preexec close = No
root postexec =
available = Yes
volume =
fstype = NTFS
set directory = No
wide links = No
follow symlinks = Yes
dont descend =
magic script =
magic output =
delete readonly = No
dos filemode = No
dos filetimes = Yes
dos filetime resolution = No
fake directory create times = No
vfs objects = acl_xattr
msdfs root = No
msdfs proxy =
[DATI]
comment = DATI
path = /opt/fileserver/shares/DATI
read only = No
[EDP]
comment = EDP
path = /opt/fileserver/shares/EDP
read only = No
[UTILITY]
comment = UTILITY
path = /opt/fileserver/shares/UTILITY
read only = No
[ARCHIVE]
comment = ARCHIVE
path = /opt/fileserver/archive/kvm-white.target1
valid users = "@EXAMPLE\domain admins"
--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
GPG public key ID: FF5F32A8
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