ubifs : corruption after power cut test

[Artem Bityutskiy]

On Fri, 2010-09-24 at 17:31 +0200, Matthieu CASTET wrote:
> Artem Bityutskiy a écrit :
> > On Wed, 2010-07-28 at 09:40 +0200, Matthieu CASTET wrote:
> >> I manage to reproduce it with the backtrace [1].
> > 
> > Matthieu, your work-around patch or something very close should
> > certainly be applied to the UBIFS tree, but I still would like to find
> > out what exactly happened in your setup.
> > 
> > I see 2 possibilities:
> > 
> > 1. An error happened and 'ubifs_garbage_collect()' returned while
> > c->gc_lnum was -1. But in this case we should have switched to R/O mode,
> > and the master node would not be written. But may be for some reasons we
> > did not switch to R/O mode, dunno.
> > 
> > 2. More likely scenario: in 'ubifs_rcvry_gc_commit()' we call
> > 'ubifs_garbage_collect_leb()' directly, which can return while
> > c->gc_lnum is -1. And we do not handle this.
> > 
> > Would you please be patient enough to reproduce the issue once again with
> > the following patch, which was created against the latest ubifs-2.6.git, but
> > you should be easily able to apply it to your tree.
> None of these check happen.
> 
> only the dump in ubifs_write_master.

Hmm.... This is weird... I think I need your UBIFS. Is it possible to
share? You can take vanilla 2.6.27 and put all UBIFS stuff there. Or
send patches against ubifs-v2.6.27.git

-- 
Best Regards,
Artem Bityutskiy (Битюцкий Артём)