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SubjectRe: Question about leases
Hi again,

On Tue, 27 Aug 2002 14:35:17 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> On Tue, 27 Aug 2002 03:06:16 +0200 Jan Hudec <bulb@cimice.maxinet.cz> wrote:
> >
> > Please can anyone throw a bit light on file leases (fcntl F_SETLEASE
> > command) or at least point me to some documentation? I can't find any.
>
> There isn't any (except maybe the talk I gave at Linux Kongress
> last year (http://www.canb.auug.org.au/~sfr/idle.html).
>
> > As far as I figured out process holding a lease is notified when other
> > process opens the leased file. But I am still not sure how the leases
> > should then be released and how the process knows which lease was broken
> > (struct siginfo does not seem to have union member for that case).
>
> To release a lease, you use fcntl(fd, F_SETLEASE, F_UNLCK). The file
> descriptor of the file that the lease is on is returned in the
> siginfo structure.

You should also be aware that there are lots of bugs with file leases
before 2.4.20-pre3 and in early 2.5 kernels.
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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