Re: [PATCH] bug in old-cache handling in mountd.

[Steve Dickson <SteveD@redhat.com>]

Neil Brown wrote:
> Hi,
>  there is a bug in the old-cache behaviour of mountd.
>  Hopefully no-one is using this but you never know....
> 
>  The bug was reported to redhat
>     https://bugzilla.redhat.com/show_bug.cgi?id=164186
> 
>  It was fixed incorrectly and never (that I recall) reported
>  upstream. :-(
> 
>  A SLES customer thinks they have hit the same problem, which is why
>  I'm looking at it.  (They shouldn't really hit it because that
>  version of sles uses 'new_cache' but maybe nfsdfs was disabled
>  somehow - don't know yet).
> 
>  Anyway, when mountd gets a mount request, it tells the kernel about it
>  and remembers that it told the kernel so it doesn't have to tell the
>  kernel again.
>  It is possible that "exportfs -r" will tell the kernel to forget that
>  information if the client has since unmounted.
>  So mountd really needs to tell the kernel even if it thinks the
>  kernel should already know.
> 
>  The following patch does this if the kernel refuses to provide a
>  valid filehandle.
> 
>  Does RHEL3 use old-cache or new-cache ??
The new cache, if it exists...

Committed..

steved.