Re: recent nfs change causes autofs regression

Jakob Oestergaard
2007-08-31T07:40:38Z

On Thu, Aug 30, 2007 at 10:16:37PM -0700, Linus Torvalds wrote:
>
...
> > Why aren't we doing that for any other filesystem than NFS?
>
> How hard is it to acknowledge the following little word:
>
> "regression"
>
> It's simple. You broke things. You may want to fix them, but you need to
> fix them in a way that does not break user space.

Trond has a point Linus.

What he "broke" is, for example, a ro mount being mounted as rw.

That *could* be a very serious security (etc.etc.) problem which he just fixed.
Anything depending on read-only not being enforced will cease to work, of
course, and that is what a few people complain about(!).

If ext3 in some rare case (which would still mean it hit a few thousand users)
failed to remember that a file had been marked read-only and allowed writes to
it, wouldn't we want to fix that too? It would cause regressions, but we'd fix
it, right?

mount passes back the error code on a failed mount. autofs passes that error
along too (when people configure syslog correctly). In short; when these
serious mistakes are made and caught, the admin sees an error in his logs.

This is not wrong. This is good.

--

/ jakob