[OpenAFS-devel] getcwd() on Linux 2.6.18+OpenAFS 1.4.2 bugs/errors.

[Michael Loftis]

--On November 8, 2007 3:15:07 PM -0800 Russ Allbery <rra@stanford.edu> 
wrote:

> Michael Loftis <mloftis@wgops.com> writes:
>> --On November 8, 2007 5:49:40 PM -0500 Jim Rees <rees@umich.edu> wrote:
>
>>> You've mounted a volume in two different places and now you're
>>> surprised that you can get to it from either mount point?  I don't see
>>> what the problem is.
>
>> No.  The problem is pwd (getcwd()) returns erroneous information.  Worse
>> when you chroot it returns paths *outside* the chroot.
>
> This is probably the same as:
>
>     http://rt.central.org/rt/Ticket/Display.html?id=3753
>
> which is a long-standing problem related to how the Linux kernel caches
> directory information (I think).

I've confirmed it as being present in 2.6.23.1-21.fc7 + OpenAFS1.4.5 
(1.4.5-fc7.1) as well.
The behavior sounds identical to that, and matches what I was thinking 
about the dentry cache being involved somehow.  My Darwin/OSX (Leopard) 
laptop with 1.4.5 doesn't see the same behavior (can't chroot mind you but 
I can do pwd) so that matches that as well.  Is there any ... timeline or 
proposal for fixing?

It's somewhat fuzzy to me so i'm not 100% certain, but all the symptoms 
indeed match that.



>
> --
> Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>
>



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