[linux-cifs-client] mount.cifs and dfs referrals

Thu Jan 29 20:06:32 GMT 2009

What exactly do you need?

________________________________________
Van: Q (Igor Mammedov) [niallain at gmail.com]
Verzonden: donderdag 29 januari 2009 20:29
Aan: Werner Maes
CC: linux-cifs-client at lists.samba.org
Onderwerp: Re: [linux-cifs-client] mount.cifs and dfs referrals

It is hard to comment on issue, without log and dump of the packets.

On Thu, Jan 29, 2009 at 8:23 PM, Werner Maes
<Werner.Maes at icts.kuleuven.be> wrote:
> yes
>
> I had configured it:
>
> # cat /etc/request-key.conf
> create cifs.spnego * * /usr/sbin/cifs.upcall %k
> create dns_resolver * * /usr/sbin/cifs.upcall %k
>
> this resolved some issues e.g:
> I can now follow a dfs link in this mounted share:
>
> mount.cifs //dfsserver.icts.kuleuven.be/shares /mnt -o ... (dfs root level)
> this share on the dfs-server contains dfs links and they work.
>
> HOWEVER:
>
> what does not work if I access it through the domain level e.g.:
>
> mount.cifs //AD-DOMAIN/shares /mnt
>
> the mount works without kernel failures but I can't follow the link
>
> [root at fedora10 Users]# ls
> ls: reading directory .: Object is remote
>
> Jan 29 17:52:43 localhost kernel: Status code returned 0xc0000257 NT_STATUS_PATH_NOT_COVERED
>
> (Users being a dfs link)
>
> I enabled some error logging with echo 7 > /proc/fs/cifs/cifsFYI
> but I can't work out what's wrong..
> maybe some issues with Active Directory??
>
> werner
>
>> -----Original Message-----
>> From: Igor Mammedov [mailto:niallain at gmail.com]
>> Sent: donderdag 29 januari 2009 17:56
>> To: Werner Maes
>> Cc: 'linux-cifs-client at lists.samba.org'
>> Subject: Re: [linux-cifs-client] mount.cifs and dfs referrals
>>
>> Werner Maes wrote:
>> > I also get this message
>> >
>> > CIFS VFS: dns_resolve_server_name_to_ip: unable to resolve:
>> xxx.icts.kuleuven.be
>> > CIFS VFS: compose_mount_options: Failed to resolve server part of
>> \\xxx.icts.kuleuven.be\share to IP
>> >
>> > which seems strange since I can ping the server name in question.
>>
>> Check if your samba package have cifs.upcall program.
>> Then add into /etc/request-key.conf a line like this:
>>
>> create dns_resolver     *       *     /bla/bla/cifs.upcall %k
>>
>>
>>
>> >
>> > what does mount.cifs use for name resolution?
>> >
>> > werner
>> >
>> >> -----Original Message-----
>> >> From: Igor Mammedov [mailto:niallain at gmail.com]
>> >> Sent: donderdag 29 januari 2009 14:16
>> >> To: Werner Maes
>> >> Cc: 'linux-cifs-client at lists.samba.org'
>> >> Subject: Re: [linux-cifs-client] mount.cifs and dfs referrals
>> >>
>> >> At the present moment cifs is able to follow DFS links only inside
>> >> mounted share.
>> >> You are attempting to mount share that itself is remote, and cifs
>> can't
>> >> do it now.
>> >> However there is workaround, you can find out what server works as a
>> >> real storage
>> >> for your share and mount it.
>> >>
>> >> Werner Maes wrote:
>> >>> hello
>> >>>
>> >>> I wanted to know whether mount.cifs is able to follow dfs
>> referrals.
>> >>> On my system I get a kernel failure if I try this
>> >>>
>> >>> mount.cifs //AD-DOMAIN/DFS /mnt -o username="AD\user"
>> >>>
>> >>> /mnt seems to be mounted
>> >>> //xx.yy.KULEUVEN.BE/xx/ on /mnt type cifs (rw,mand)
>> >>>
>> >>> but if I do ll /mnt, I get a segmentation fault and this appears in
>> >> dmesg (see below):
>> >>> so my question is: is mount.cifs able to follow dfs links like
>> >> smbclient can?
>> >>> kind regards
>> >>>
>> >>> werner
>> >>>
>> >>> kernel BUG at fs/cifs/cifs_dfs_ref.c:274!
>> >>> invalid opcode: 0000 [#1] SMP
>> >>> Modules linked in: nls_utf8 cifs fuse sunrpc ipv6 dm_multipath
>> uinput
>> >> ppdev floppy pcspkr i2c_piix4 pcnet32 mii parport_pc i2c_core
>> parport
>> >> BusLogic [last unloaded: microcode]
>> >>> Pid: 5110, comm: ls Not tainted (2.6.27.12-170.2.5.fc10.i686 #1)
>> >>> EIP: 0060:[<d09d6ef1>] EFLAGS: 00010246 CPU: 0
>> >>> EIP is at cifs_dfs_follow_mountpoint+0x3b/0x627 [cifs]
>> >>> EAX: c68ce7f8 EBX: c68ce7f8 ECX: d09ec7dc EDX: cfb85f38
>> >>> ESI: cfb85f38 EDI: ce5d3000 EBP: cfb85e88 ESP: cfb85e3c
>> >>>  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
>> >>> Process ls (pid: 5110, ti=cfb85000 task=c1613340 task.ti=cfb85000)
>> >>> Stack: cfb85e58 cfb85f38 cf84af68 cf84af00 ce5d3000 cfb85e70
>> c04a4a55
>> >> c06a9411
>> >>>        cf0565d8 cfb85edc cfb85f38 cfb85edc ce5d3000 cfb85e78
>> 00000000
>> >> 00000000
>> >>>        00000000 cfb85f38 ce5d3000 cfb85eb4 c049941c cfb85edc
>> cfb85edc
>> >> c68ce7f8
>> >>> Call Trace:
>> >>>  [<c04a4a55>] ? mntput_no_expire+0x1a/0xf7
>> >>>  [<c06a9411>] ? _spin_lock+0x8/0xb
>> >>>  [<c049941c>] ? do_follow_link+0xdb/0x272
>> >>>  [<c0499110>] ? __link_path_walk+0x5b2/0x6b5
>> >>>  [<c04995ff>] ? path_walk+0x4c/0x9b
>> >>>  [<c04997fb>] ? do_path_lookup+0x12d/0x175
>> >>>  [<c049a8fa>] ? user_path_at+0x3c/0x62
>> >>>  [<c04a4a55>] ? mntput_no_expire+0x1a/0xf7
>> >>>  [<c0497986>] ? mntput+0x13/0x15
>> >>>  [<c04a9021>] ? sys_getxattr+0x1e/0x49
>> >>>  [<c051edbc>] ? trace_hardirqs_on_thunk+0xc/0x10
>> >>>  [<c0403c6e>] ? syscall_call+0x7/0xb
>> >>>  =======================
>> >>> Code: d0 01 89 55 b8 c7 45 f0 00 00 00 00 c7 45 ec 00 00 00 00 74
>> 11
>> >> 68 94 a6 9d d0 68 2f 64 9e d0 e8 82 08 cd ef 59 5e 3b 5b 18 75 04
>> <0f>
>> >> 0b eb fe e8 20 7c ff ff f6 05 00 da 9e d0 01 89 45 bc 74 21
>> >>> EIP: [<d09d6ef1>] cifs_dfs_follow_mountpoint+0x3b/0x627 [cifs]
>> SS:ESP
>> >> 0068:cfb85e3c
>> >>>
>> >>>
>> >>> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
>> >>>
>> >>> _______________________________________________
>> >>> linux-cifs-client mailing list
>> >>> linux-cifs-client at lists.samba.org
>> >>> https://lists.samba.org/mailman/listinfo/linux-cifs-client
>> >> --
>> >>
>> >> Best regards,
>> >>
>> >> -------------------------
>> >> Igor Mammedov,
>> >> niallain "at" gmail.com
>> >>
>> >>
>> >>
>> >
>> >
>> > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
>> >
>>
>> --
>>
>> Best regards,
>>
>> -------------------------
>> Igor Mammedov,
>> niallain "at" gmail.com
>>
>>
>>
>
>
> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
>
>
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm