[PATCH v2] ubi-utils: Add ubiblock tool

[Ezequiel Garcia]

On Apr 07, Artem Bityutskiy wrote:
> On Sat, 2014-04-05 at 17:33 -0300, Ezequiel Garcia wrote:
> > Hello Artem, Richard:
> > 
> > On Mar 14, Ezequiel Garcia wrote:
> > > With the addition of block device access to UBI volumes, we now
> > > add a simple userspace tool to access the new ioctls.
> > > 
> > > Usage of this tool is as simple as it gets:
> > > 
> > >   $ ubiblock --create /dev/ubi0_0
> > > 
> > > will create a new block device /dev/ubiblock0_0, and
> > > 
> > >   $ ubiblock --remove /dev/ubi0_0
> > > 
> > 
> > After using this for something else than silly tests, I've found this
> > usage is actually a bit braindead :-)
> > 
> > The user will probably want to create a block device based on the volume's
> > name or ID, and not just the node path. In particular, using the name is
> > probably the most useful case, given the atomic ubi volume rename feature.
> > 
> > Therefore, I'd like to see this fixed, but I'm not entirely sure what's the
> > best approach. Here are my ideas so far to identify a volume:
> > 
> >   * Follow the convention of ubirmvol:
> > 
> >     ubiblock --create /dev/ubi0_0 (like we have now)
> >     ubiblock --create <UBI device node file name>
> > 	     [-n <volume id>] [--vol_id=<volume id>]
> >              [-N <volume name>] [--name=<volume name>]
> > 
> >   * Implement something matching the mount command usage. For example,
> > 
> >     ubiblock --create /dev/ubi0_0 (like we have now)
> >     ubiblock --create ubi0:name
> >     ubiblock --create ubi0_0
> > 
> >   * All of them?
> > 
> > To be honest, I don't have any preference.
> 
> Oh, and I released your tool before I read this e-mail.
> 

Oh, no problem. It's my fault for not giving enough thought to this.

> Well, this means that your new changes need to be compatible. Sorry for
> this. Sure, go ahead with the improvements. I also do not have
> preferences. Try to be consistent with other tools, change them too if
> necessary, implement what makes sense and useful.
> 

Right then. I'll cook a patch, hopefully today!
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com