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# Copyright (c) 2006, 2007 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
# NBD_Squash.pm
# - provides NBD+Squashfs-specific overrides of the OpenSLX::OSExport::ExportType API.
# -----------------------------------------------------------------------------
package OpenSLX::OSExport::ExportType::NBD_Squash;
use vars qw(@ISA $VERSION);
@ISA = ('OpenSLX::OSExport::ExportType::Base');
$VERSION = 1.01; # API-version . implementation-version
use strict;
use Carp;
use File::Basename;
use OpenSLX::Basics;
use OpenSLX::OSExport::ExportType::Base 1.01;
################################################################################
### interface methods
################################################################################
sub new
{
my $class = shift;
my $self = {
'name' => 'NBD_Squash',
};
return bless $self, $class;
}
sub exportVendorOS
{
my $self = shift;
my $source = shift;
my $target = shift;
# TODO: once the include/exclude-patch by Vito has been applied
# to mksquashfs, the extra route via rsync isn't necessary anymore:
my $mksquashfsCanFilter = 0;
if ($mksquashfsCanFilter) {
# do filtering as part of mksquashfs (needs additional mapping of
# our internal (rsync-)filter format to regexes):
my $includeExcludeList = $self->determineIncludeExcludeList();
vlog 1, _tr("using include-exclude-filter:\n%s\n", $includeExcludeList);
$self->createSquashFS($source, $target, $includeExcludeList);
} else {
# do filtering via an rsync copy:
vlog 0, _tr("taking detour via rsync...");
my $tmpTarget = "${target}_###RSYNC_TMP###";
$self->copyViaRsync($source, $tmpTarget);
$self->createSquashFS($tmpTarget, $target);
# system("rm -r $tmpTarget");
}
$self->showNbdParams($target);
}
################################################################################
### implementation methods
################################################################################
sub createSquashFS
{
my $self = shift;
my $source = shift;
my $target = shift;
my $includeExcludeList = shift;
system("rm -rf $target");
# mksquasfs isn't significantly faster if fs already exists, but it
# causes the filesystem to grow somewhat, so we remove it in order to
# get the smallest FS-file possible.
if (system("mksquashfs $source $target -info")) {
die _tr("unable to create squashfs for source '%s into target '%s', giving up! (%s)",
$source, $target, $!);
}
}
sub showNbdParams
{
my $self = shift;
my $target = shift;
print (('#' x 80)."\n");
print _tr("Please make sure you start a corresponding nbd-server:\n\t%s\n",
"nbd-server -r $self->{engine}->{'export-path'}");
print (('#' x 80)."\n");
}
1;
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