Failure to set permissions on Samba share via CIFS
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Won't Fix
|
Medium
|
Unassigned | ||
Bug Description
Binary package hint: samba
I'm trying to use a samba share via CIFS and am encountering problems when trying to copy or move files onto the share. If I create a file directly on the share it works as expected (using my umask for permissions) but copying or moving result in errors. To reproduce:
root@boris:/mnt# mount -t cifs //arctic/holding /mnt/testo -o credentials=
root@boris:/mnt# mkdir ~/z
root@boris:/mnt# mv ~/z testo/
mv: failed to preserve ownership for `testo/z': Permission denied
mv: preserving permissions for `testo/z': Permission denied
root@boris:/mnt# ls -ld testo/z
drwx--S--- 2 clouserw root 0 2009-12-14 21:38 testo/z
root@boris:/mnt# umask
0022
This looks _a lot_ like (and might be a duplicate/dependent on) debian bug 532153 ("cifs reports EACCES instead of EOPNOTSUPP for acls" http://
Neither my server or client have ACLs on their filesystem. One maybe relevent note is that mounting the same share from OS X and moving files onto it works as expected with permissions being preserved. OS X has a concept of ACLs on by default.
I'm attaching an strace.
ProblemType: Bug
Architecture: i386
Date: Mon Dec 14 21:44:52 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelMo
Package: smbfs 2:3.4.0-3ubuntu5.1
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
SourcePackage: samba
Uname: Linux 2.6.31-14-generic i686
| Wil Clouser (clouserw) wrote | #1 |
| affects: | samba (Ubuntu) → linux (Ubuntu) |
| tags: | added: karmic |
| Changed in linux (Ubuntu): | |
| importance: | Undecided → Medium |
| status: | New → Triaged |
| Andy Bovett (abovett) wrote | #2 |
| Brad Figg (brad-figg) wrote Unsupported series, setting status to "Won't Fix". | #3 |
| Changed in linux (Ubuntu): | |
| status: | Triaged → Won't Fix |
| Wil Clouser (clouserw) wrote | #4 |
I believe I'm getting the same bug. It only occurs when unix extensions are enabled on the Samba server and client. Server is Debian Lenny. client is Ubuntu Karmic. Some examples:
This works OK:
$ touch x
$ cp x /mnt/SOL/general/
This gives an error:
$ touch x
$ mv x /mnt/SOL/general/
mv: preserving permissions for `/mnt/SOL/
And sure enough the move works but the permissions are different:
$ ls -l x
-rw-rw-r-- 1 andrew andrew 0 2010-01-30 00:17 x
$ ls -l /mnt/SOL/general/x
-rwx-w---- 1 andrew andrew 0 2010-01-30 00:17 /mnt/SOL/general/x*
However this works:
$ chmod 664 /mnt/SOL/general/x
$ ls -l /mnt/SOL/general/x
-rw-rw-r-- 1 andrew andrew 0 2010-01-30 00:17 /mnt/SOL/general/x
This also gives an error:
$ touch x
$ cp -p x /mnt/SOL/general/
cp: preserving permissions for `/mnt/SOL/
Here's my server smb.conf (cleaned up with comments and printer definitions removed)
[global]
workgroup = ajblan
server string = %h server
dns proxy = no
log file = /var/log/
max log size = 1000
syslog = 0
panic action = /usr/share/
security = user
encrypt passwords = true
passdb backend = tdbsam
obey pam restrictions = yes
unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\
pam password change = yes
load printers = yes
printing = cups
printcap name = cups
[general]
comment = General files
path = /media/data/general
valid users = @fullaccess
force group = fullaccess
create mask = 0770
directory mask = 0771
writable = yes
And here's my mount line from fstab on the client:
//SOL/general /mnt/SOL/general cifs credentials=
(I'm aware that file_mode and dir_mode don't apply when unix extensions are enabled but I have them there for when they are not.)
This bug is causing me a lot of hassle so if any help/workarounds can be suggested I'd be grateful.
Andy