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# vim: set et ts=4 sw=4:
package ManaTools::Shared::disk_backend::Plugin::Partition;
#============================================================= -*-perl-*-
=head1 NAME
ManaTools::Shared::disk_backend::Plugin::Partition - Partition object
=head1 SYNOPSIS
use ManaTools::Shared::disk_backend::Plugin::Partition;
my $db_man = ManaTools::Shared::disk_backend::Plugin::Partition->new($parent);
...
=head1 DESCRIPTION
This plugin is an Partition plugin for the backend to manadisk
=head1 SUPPORT
You can find documentation for this plugin with the perldoc command:
perldoc ManaTools::Shared::disk_backend::Plugin::Partition
=head1 AUTHOR
Maarten Vanraes <alien@rmail.be>
=head1 COPYRIGHT and LICENSE
Copyright (c) 2015 Maarten Vanraes <alien@rmail.be>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2, as
published by the Free Software Foundation.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
=head1 METHODS
=cut
use Moose;
use File::Basename;
use ManaTools::Shared::disk_backend::PartitionTable;
extends 'ManaTools::Shared::disk_backend::Plugin';
has '+dependencies' => (
default => sub {
return ['Disk', 'Loop'];
}
);
has '+tools' => (
default => sub {
return {parted => '/usr/sbin/parted'};
}
);
#=============================================================
=head2 load
=head3 OUTPUT
0 if failed, 1 if success or unneeded
=head3 DESCRIPTION
this method will load all disks partition tables
=cut
#=============================================================
override ('loadio', sub {
my $self = shift;
my $io = shift;
# get the partition table
my $pt = ManaTools::Shared::disk_backend::PartitionTable->new(parted => $self->tool('parted'), disk => $io->file());
# get partitions and mkio them all
for my $p (values %{$pt->partitions()}) {
my @stat = stat($p->{'file'});
my $dev = $stat[6];
my $minor = $dev % 256;
my $major = int (($dev - $minor) / 256);
my $io = $self->parent->mkio('Partition', {id => $p->{'file'} =~ s'^.+/''r});
$io->prop('dev', $major .':'. $minor);
$io->sync_majorminor();
$io->prop('start', $p->{'start'});
$io->prop('size', $p->{'size'});
$io->prop('num', $p->{'num'});
# TODO: also create the Part (if it doesn't already exists) and link it
}
return 1;
});
#=============================================================
=head2 probeio
=head3 OUTPUT
0 if failed, 1 if success or unneeded
=head3 DESCRIPTION
this method will try to probe the specific disk IO and get partitions
=cut
#=============================================================
override ('probeio', sub {
my $self = shift;
my $io = shift;
my $part = undef;
# return if $io is not the correct type
if ($io->type() ne 'Disk') {
return 1;
}
if ($io->prop('present') == 0) {
return 1;
}
# find out if the IO already has a part, if not: make a part
my @parts = $self->parent->findin($io);
if (scalar(@parts) > 0) {
$part = $parts[0];
}
else {
$part = $self->parent->mkpart('PartitionTable', {plugin => $self});
if (!defined($part)) {
return 0;
}
# assign this IO to the ins
if (!$part->in_add($io)) {
return 0;
}
# add properties
# TODO: partition table type, size and position, logical alignment, etc...
# default partition is always 1 sector ?
$part->prop('size', 1);
# add an action
$part->add_action('addPartition', 'Add a partition', $part, sub {
my $self = shift;
my $part = $self->item();
print STDERR "Add partition is not implemented...\n";
return 1;
}, sub {
my $self = shift;
my $part = $self->item();
return 1;
});
}
@parts = $self->parent->findin($io);
my $err = 0;
my $partitions = 0;
# find subdevices in /sys/
for my $pf (glob($io->path(). "/". $io->id() ."*")) {
my $io = $self->parent->mkio('Partition', {id => $pf =~ s'^.+/''r});
$io->prop_from_file('sectors', $pf . '/size');
# sectors are always 512 bytes here!
$io->prop('size', $io->prop('sectors') * 512);
$io->prop_from_file('start', $pf . '/start');
$io->prop_from_file('ro', $pf . '/ro');
$io->prop_from_file('dev', $pf . '/dev');
$io->sync_majorminor();
$io->prop('num', $pf =~ s/^.+([0-9]+)$/$1/r);
$partitions = $partitions + 1;
if (!$part->out_add($io)) {
$err = 1;
}
}
$part->prop('partitions', $partitions);
# find out how to differentiate between an empty partition table and no partition table
return $err == 0;
});
package ManaTools::Shared::disk_backend::IO::Partition;
use Moose;
extends 'ManaTools::Shared::disk_backend::IO';
with 'ManaTools::Shared::disk_backend::BlockDevice';
has '+type' => (
default => 'Partition'
);
package ManaTools::Shared::disk_backend::Part::PartitionTable;
use Moose;
extends 'ManaTools::Shared::disk_backend::Part';
use MooseX::ClassAttribute;
class_has '+type' => (
default => 'PartitionTable'
);
class_has '+in_restriction' => (
default => sub {
return sub {
my $self = shift;
my $io = shift;
my $del = shift;
if (!defined $del) {
$del = 0;
}
if ($del != 0) {
return ($self->in_length() > 0);
}
return ($self->in_length() == 0 && ref($io) eq 'ManaTools::Shared::disk_backend::IO::Disk');
};
}
);
class_has '+out_restriction' => (
default => sub {
return sub {
my $self = shift;
my $io = shift;
my $del = shift;
if (!defined $del) {
$del = 0;
}
if ($del != 0) {
return ($self->out_length() > 0);
}
return ($self->out_length() < 4 && ref($io) eq 'ManaTools::Shared::disk_backend::IO::Partition');
};
}
);
1;
|
