Re: fistgen-0.1.1 released (linux-2.6 support)

["Charles P. Wright" <cpwright@cpwright.com>]

On Mon, 2004-08-02 at 21:54, Shaya Potter wrote:
> > One uses it by typing "cp -a dir1 dir2" or "cp -r dir1 dir2".
> > 
> > That's all.  There are no user-visible versions, no branch
> > management, and no other commands.
> 
> I have a "working" (relative term as performance sucks) fs that can do
> that.  It combined a file system based out of fist's templates and a bit
> of hacking on ext3cow.
> 
> basic idea is that ext3cow provided the individual file versioning
> semantic (and directories are just treated as containers) while the
> stackable fs managed the branching (and deciding when to version and the
> like).
> 
> was able to build 4 kernels side by side w/o a problem.
> 
> i.e. it was something along the lines of (from memory)
> 
> # mkfs.ext3cow /dev/loop0
> # mount -t ext3cow /dev/loop0 /mnt
> # mount -o bind /mnt /mnt1
> # mount -o bind /mnt /mnt2
> # mount -o bind /mnt /mnt3
> # (cd /mnt ; tar xzf ~/linux.tar.gz)
> # mount -t branchfs -o new_branch=new,old_branch=,(some fist
> options) /mnt /mnt
> # cd /mnt
> # branch_ioctl new1
> # mount -t branchfs -o new_branch=new2,old_branch=new,(some fist
> options) /mnt1 /mnt1
> # mount -t branchfs -o new_branch=new2,old_branch=new,(some fist
> options) /mnt2 /mnt2
> # mount -t branchfs -o new_branch=new2,old_branch=new,(some fist
> options) /mnt2 /mnt2
> 
> lots of issues w/ it, but it was able to do the above as (well as then
> build the kernels).
> 
Shaya,

What does that sequence of commands actually mean?

Charles