Re: Reiser4 oops on cat ./..plugin/..readdir

[Jonathan Briggs <jbriggs@esoft.com>]

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On Fri, 2004-02-27 at 10:14, Nikita Danilov wrote:
> Jonathan Briggs writes:
>  > On Fri, 2004-02-27 at 04:29, Nikita Danilov wrote:
>  > > Jonathan Briggs writes:
>  > >  > Filesystem is on a RAID 0 MD device.
>  > >  > Config is attached.
>  > >  > Kernel compiled with:
>  > >  > 
>  > >  > # gcc34 --version
>  > >  > gcc34 (GCC) 3.4.0 20040129 (Red Hat Linux 3.4.0-0.3)
>  > >  > Copyright (C) 2004 Free Software Foundation, Inc.
>  > >  > This is free software; see the source for copying conditions.  There is NO
>  > >  > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>  > >  > 
>  > >  > Problem Description:
>  > >  > A clean, fresh boot into single user mode, no tainted modules:
>  > >  > # cd /home
>  > >  > # cat ./..plugin/..readdir
>  > > 
>  > > Please try the following patch:
>  > > ----------------------------------------------------------------------
>  > > ===== plugin/pseudo/pseudo.c 1.41 vs edited =====
>  > > --- 1.41/plugin/pseudo/pseudo.c	Tue Jan 27 18:40:13 2004
>  > > +++ edited/plugin/pseudo/pseudo.c	Fri Feb 27 14:27:54 2004
>  > > @@ -533,7 +533,7 @@
>  > >  	dotname.len  = 1;
>  > >  
>  > >  	down(&host->i_sem);
>  > > -	if (dplug == NULL) {
>  > > +	if (dplug == NULL || dplug->build_entry_key == NULL) {
>  > >  		finish(NULL);
>  > >  		return NULL;
>  > >  	}
>  > > ----------------------------------------------------------------------
>  > 
>  > Yes, this fixed the Oops.  Thanks.
>  > 
>  > That gives me another question.  Why do I not see any plugins listed
>  > when I do either ls ./..plugin/ or cat ./..plugin/..readdir?
> 
> /data1/tests> cat ./..pseudo # list of pseudo file accessible under "."
> ..uid
> ..gid
> ..rwx
> ..oid
> ..key
> ..size
> ..nlink
> ..locality
> ..pagecache
> ..pseudo
> ..bmap
> ..readdir
> ..plugin
> ..items
> ..new
> /data1/tests> cd ./..plugin # pseudo directory representing plugins of "."
> /mnt/b1/tests/..plugin> ls
> compression  crypto  digest  dir  dir_item  file  formatting  hash  perm  sd
> 
>  > 
>  > Shouldn't there be at least a few default plugins?  I seem to remember
>  > seeing some when I was using a previous snapshot in January.
> 
> See http://namesys.com/v4/pseudo.html for details.

Oh yes, I have read everything about v4 that I could find.  I am very
excited about it! :-)

I see the difference now.  Try just doing ls ./..plugin/.  No output. 
But cd ./..plugin; ls does produce a list just like yours.  Strange!  Is
this a bug?
-- 
Jonathan Briggs
jbriggs@esoft.com

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