#!/bin/sh

# A script to cleanup resource leases auto-created by
# the libvirt lock plugin for sanlock

# Copyright (C) 2011, 2013 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library.  If not, see
# <http://www.gnu.org/licenses/>.

verbose=1
if test "x$1" = "x-q" ; then
  verbose=0
fi

LOCKSPACE="__LIBVIRT__DISKS__"

LOCKDIR=`augtool get '/files@sysconfdir@/libvirt/qemu-sanlock.conf/disk_lease_dir'`
LOCKDIR=${LOCKDIR#* = }
if test $? != 0 || test "x$LOCKDIR" = "x" ; then
  LOCKDIR="@localstatedir@/lib/libvirt/sanlock"
fi

notify() {
  test $verbose = 1 || return
  if test "x$1" = "x-n"; then
    shift
    printf %s "$*"
  else
    printf %s\\n "$*"
  fi
}

cd "$LOCKDIR" || exit 1

for MD5 in *
do
  if test $MD5 != '*' && test $MD5 != $LOCKSPACE ; then
    RESOURCE="$LOCKSPACE:$MD5:$LOCKDIR/$MD5:0"
    notify -n "Cleanup: $RESOURCE "
    sanlock client command -r $RESOURCE -c /bin/rm -f "$LOCKDIR/$MD5" 2>/dev/null
    if test $? = 0 ; then
      notify "PASS"
    else
      notify "FAIL"
    fi
  fi
done

exit 0

: <<=cut
=pod

=head1 NAME

  virt-sanlock-cleanup - remove stale sanlock resource lease files

=head1 SYNOPSIS

  virt-sanlock-cleanup

=head1 DESCRIPTION

This tool removes any resource lease files created by the sanlock
lock manager plugin. The resource lease files only need to exist
on disks when a guest using the resource is active. This script
reclaims the disk space used by resources which are not currently
active.

=head1 EXIT STATUS

Upon successful processing of leases cleanup, an exit status
of 0 will be set. Upon fatal error a non-zero status will
be set.

=head1 AUTHOR

Daniel Berrange

=head1 BUGS

Report any bugs discovered to the libvirt community via the
mailing list C<http://libvirt.org/contact.html> or bug tracker C<http://libvirt.org/bugs.html>.
Alternatively report bugs to your software distributor / vendor.

=head1 COPYRIGHT

Copyright (C) 2011, 2013 Red Hat, Inc.

=head1 LICENSE

virt-sanlock-cleanup is distributed under the terms of the GNU GPL v2+.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE

=head1 SEE ALSO

C<virsh(1)>, online instructions C<http://libvirt.org/locking.html>

=cut
