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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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