Re: CD writing in future Linux (stirring up a hornets' nest)

[Joerg Schilling]

"Theodore Ts'o" <tytso@xxxxxxx> wrote:

> On Fri, Feb 10, 2006 at 03:54:44PM +0100, Joerg Schilling wrote:
> > >
> > > 1)  File != device.
> > 
> > I am sorry, but it turns out that you did not understand the problem.
> > 
> > Try to inform yourself about the relevence (and content) of st_dev before
> > replying again.
>
> st_dev is irrelevant in the context of CD burning.

If you did try to understand the reason why I did introduce the POSIX
claim, you would know that if Linux did try to follow the POSIX rule,
a side effect would be that removable devices need to have a stable 
mapping in the kernel


> In the context of mounted files, the only guarantee given by POSIX is
> that st_dev and st_ino for a particular file is unique.  But that
> clearly is true while the containing filesystem is mounted.  Even with
> Solaris, if a particular removable filesystem is unmounted and removed
> from one device (say one Jazz/Zip drive) and inserted into another
> device (say another Jazz/Zip drive), st_dev will change --- while the
> system is running.

Please don't confuse the fact that you will _always_ be able to find
ways to confuse a system with the fact that this needs to happen in all cases.

Jörg

-- 
 EMail:joerg@xxxxxxxxxxxxxxxxxxxxxxxxxxx (home) Jörg Schilling D-13353 Berlin
       js@xxxxxxxxxxxxxxx                (uni)  
       schilling@xxxxxxxxxxxxxxxxxxx     (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/