Re: [NFS] [PATCH] Make UDF exportable

[Neil Brown <neilb@suse.de>]

On Wednesday February 6, rohde@duff.dk wrote:
> > > +	dotdot.d_name.name = "..";
> > > +	dotdot.d_name.len = 2;
> > > +
> > > +	lock_kernel();
> > > +	if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
> > > +		goto out_unlock;
> >   Have you ever tried this? I think this could never work. UDF doesn't have
> > entry named .. in a directory. You have to search for an entry that has
> > in fileCharacteristics set bit FID_FILE_CHAR_PARENT. Maybe you could
> > hack-around udf_find_entry() to recognize .. dentry and do the search
> > accordingly.
> Probably not. I just tested that I could read files and navigate the
> directory structure. However looking into UDF I think you are right - it
> will fail.
> I have extended udf_find_entry() to do an explicit check based on
> fileCharacteristics as you propose.
> How do I actually test this case?

 - Mount the filesystem from the server.
 - 'cd' a few directories down into the filesystem.
 - reboot the server(1)
 - on the client 'ls -l'.

(1) A full reboot isn't needed.  Just unexport, unmount, remount,
    re-export on the server.

alternately, use a non-linux client and cd down into the filesystem
and
    ls -l ..

NeilBrown