Re: DFS referrals

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Hi again,

On Mon, 29 Jul 2013 14:50:03 +0200
Marcus Moeller <marcus.moeller@xxxxxx> wrote:

[  124.607810] fs/cifs/cifssmb.c: negprot rc 0
[  124.607814] fs/cifs/connect.c: Security Mode: 0xf Capabilities:
0x8001f3fc TimeAdjust: -7200
[  124.607817] fs/cifs/sess.c: sess setup type 4
[  124.607826] fs/cifs/cifs_spnego.c: key description =
ver=0x2;host=d.ethz.ch;ip4=82.130.70.6;sec=krb5;uid=0xaf05;creduid=0xaf05;user=mam4tst;pid=0x61a

[  124.803185] fs/cifs/sess.c: ssetup freeing small buf
ffff88022c31a000
[  124.803195] CIFS VFS: Send error in SessSetup = -126
[  124.803203] fs/cifs/connect.c: CIFS VFS: leaving
cifs_get_smb_ses (xid = 5) rc = -126
[  124.803212] fs/cifs/fscache.c:
cifs_fscache_release_client_cookie:
(0xffff88022a1b6000/0xffff88022a6430f0)
[  124.803368] fs/cifs/connect.c: CIFS VFS: leaving cifs_mount (xid
= 4) rc = -126
[  124.803374] CIFS VFS: cifs_mount failed w/return code = -126

The only failure I see is the one above, and that's because it failed
to upcall for the correct key. Are you sure you have krb5 creds as that
user?

Yes, creds are there and it also works when mounting from one of the
servers directly.

Only mounting using the domainname does not work.


[  131.324798] fs/cifs/cifssmb.c: negprot rc 0
[  131.324804] fs/cifs/connect.c: Security Mode: 0xf Capabilities:
0x8001f3fc TimeAdjust: -7200
[  131.324808] fs/cifs/sess.c: sess setup type 4
[  131.324821] fs/cifs/cifs_spnego.c: key description =
ver=0x2;host=d.ethz.ch;ip4=172.31.65.62;sec=krb5;uid=0xaf05;creduid=0xaf05;user=mam4tst;pid=0x62c

[  131.384335] fs/cifs/transport.c: For smb_command 115
[  131.384344] fs/cifs/transport.c: Sending smb: smb_len=1666
[  131.387043] fs/cifs/connect.c: RFC1002 header 0xf9
[  131.387055] fs/cifs/misc.c: checkSMB Length: 0xfd,
smb_buf_length: 0xf9
[  131.387095] fs/cifs/transport.c: cifs_sync_mid_result: cmd=115
mid=2 state=4
[  131.387100] fs/cifs/misc.c: Null buffer passed to
cifs_small_buf_release

Here' the upcall for a similar set of creds worked fine. The only thing
that seems to have changed in the key description is the IP address.

Do you have cifs.upcall set up to use the --trust-dns flag? If so, why?

A relict from the past. I have removed it from the config. Thanks for
pointing out.


Ok. Does removing that make any difference?

Nope, still behaves the same. I should perhaps add that this worked fine
in the past, so I hoped it might work again with this commit:

http://thread.gmane.org/gmane.linux.kernel.cifs/8197/focus=8232

but it doesn't.

Is there any way to debug this further?

Greets
Marcus


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