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

[Werner Maes]

If I mount the share on the NAS directly then it works but this is not my goal.

What do you mean by "only inside mounted share"?

I'm using fedora 10( 2.6.27-12) which has cifs version 1.54.
Are the problems that I'm facing resolved in 2.6.28 or higher?

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
> >
> >
> >
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> >
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> 
> --
> 
> Best regards,
> 
> -------------------------
> Igor Mammedov,
> niallain "at" gmail.com
> 
> 
> 


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