[linux-cifs-client] CIFS Permissions mapping from Linux to windows shares

[apostolos pantazis]

Shirish, here are the details:

The Old entry (using smbfs) was as follows:

//myshare/Paul$ /Paul/Test smbfs
rw,credentials=/etc/.smbpassword2,workgroup=AP,uid=11119,gid=8890,dmask=770,fmask=770
0 0

The new entry (using CIFS) looks like:

//myshare/Paul$ /Paul/Test cifs
rw,credentials=/etc/.creds2,domain=AP,uid=11119,gid=8890,dir_mode=0770,file_mode=0770
0 0

The .creds2 file is different from the .smbpasswd2 file in the
following aspects:

.smbpasswd2 used to look like:

username = AP/myusername
password = Thepassword

.creds2

username=myusername
password=The password

In other words, the .creds2 file does not contain any spaces on either
side of the equal sign and it does not specify a domain as from what I
understand under CIFS,
The only other "main" difference is that dmask and fmask have been
replaced with dir_mode and file_mode and are now expressed in octal.
There were no changes on the windows share side to accommodate this I
assumed it would work the same. The reason for not making any changes
is that I don't understand how the UNIX permissions (SLES 9 SP3 in
this case so actually Linux) map on the windows side. Does CIFS work
different than smbfs used to in this aspect?


Here is the information on the loaded CIFS module:

version:        1.33 7C34472C845ED754C697073
description:    VFS to access servers complying with the SNIA CIFS
Specification e.g. Samba and Windows
license:        GPL
author:         Steve French <sfrench at us.ibm.com>
parm:           cifs_max_pending:Simultaneous requests to server.
Default: 50 Range: 2 to 256 (int)
parm:           cifs_min_small:Small network buffers in pool. Default:
30 Range: 2 to 256 (int)
parm:           cifs_min_rcv:Network buffers in pool. Default: 4
Range: 1 to 64 (int)
parm:           CIFSMaxBufSize:Network buffer size (not including
header). Default: 16384 Range: 8192 to 130048 (int)
depends:
supported:      external
vermagic:       2.6.5-7.287.3-bigsmp SMP PENTIUMII REGPARM gcc-3.3



My running Kernel is: 2.6.5-7.287.3-bigsmp

I sure appreciate the help.





On Thu, Mar 19, 2009 at 6:29 AM, Shirish Pargaonkar
<shirishpargaonkar at gmail.com> wrote:
> On Wed, Mar 18, 2009 at 4:26 PM, apostolos pantazis
> <apostolos.pantazis at gmail.com> wrote:
>> I am mounting a few filesystems from a Windows share to some of my
>> Linux Servers. Recently, there was a lot of talk in regards to smbfs
>> becoming deprecated under the latest kernels and so we decided to
>> replace our smbfs mounts with cifs. Read the manual, looked online
>> Read the man page, made the appropriate changes in fstab and properly
>> mounted the filesystems. All ok so far. However, when trying to do an
>> ls from the Linux side to see the contents of the share - permission
>> denied. I kept the same permissions as the smbfs mounts used (only
>> expressed in octal for CIFS)the same username and password I was
>> mounting as before and no luck. What changed in CIFS in the way
>> permissions map from Linux to windows? If anyone could explain this I
>> would be very grateful.
>>
>> Thank you kindly.
>> --
>> Paul
>> _______________________________________________
>> linux-cifs-client mailing list
>> linux-cifs-client at lists.samba.org
>> https://lists.samba.org/mailman/listinfo/linux-cifs-client
>>
>
> How are you mounting the share?  Would you be able to provide that entry?
> You can also add cifsacl mount option.
> What is the version of cifs module?
>
> If you can provide a tcpdump of the failing ls command, that would be useful.
>
> Regards,
>
> Shirish
>



-- 
Paul