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# vim: set et ts=4 sw=4:
package ManaTools::Shared::disk_backend::Plugin::Extfs;
#============================================================= -*-perl-*-
=head1 NAME
ManaTools::Shared::disk_backend::Plugin::Extfs - disks object
=head1 SYNOPSIS
use ManaTools::Shared::disk_backend::Plugin::Extfs;
my $db_man = ManaTools::Shared::disk_backend::Plugin::Extfs->new($parent);
...
=head1 DESCRIPTION
This plugin is a disk 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::Extfs
=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;
extends 'ManaTools::Shared::disk_backend::Plugin';
with 'ManaTools::Shared::disk_backend::FileSystem';
has '+fstypes' => (
default => sub { return ['ext2', 'ext3', 'ext4']; },
);
has '+dependencies' => (
default => sub {
return ['Partition', 'Loop'];
}
);
has '+tools' => (
default => sub {
return {dumpe2fs => '/usr/sbin/dumpe2fs'};
}
);
#=============================================================
=head2 changedpart
=head3 INPUT
$part: ManaTools::Shared::disk_backend::Part
$partstate: PartState
=head3 OUTPUT
0 if failed, 1 if success or unneeded
=head3 DESCRIPTION
this overridden method will load/probe/save a partition table when it's called
=cut
#=============================================================
override ('changedpart', sub {
my $self = shift;
my $part = shift;
my $partstate = shift;
$self->D("$self: called changepart for extfs: $part, $partstate");
## LOAD
# read the partition table
if ($partstate == ManaTools::Shared::disk_backend::Part->LoadedState) {
# only BlockDevices for loading
return 1 if (!$part->does('ManaTools::Shared::disk_backend::BlockDevice'));
# TODO: fstab handles loading
}
## PROBE
# check in the kernel partition table by reading /sys
if ($partstate == ManaTools::Shared::disk_backend::Part->CurrentState) {
print STDERR "$self: called changepart for probing extfs on $part\n";
$self->D("$self: called changepart for probing extfs on $part");
# only BlockDevices for loading
return 1 if (!$part->does('ManaTools::Shared::disk_backend::BlockDevice'));
# only devices that are present
return 1 if ($part->has_prop('present') && !$part->prop('present'));
print STDERR "$self: called changepart for probing extfs on $part: size ". $part->prop('size') ."\n";
$self->D("$self: called changepart for probing extfs on $part: size ". $part->prop('size'));
# only devices with positive size
return 1 if ($part->prop('size') <= 0);
print STDERR "$self: called changepart for probing extfs on $part: devicepath /dev/". $part->devicepath() =~ s'^.+/''r ."\n";
# try with dump2fs if this is actually an extfs filesystem
my %fields = $self->tool_fields('dumpe2fs', ':', '-h', '/dev/'. $part->devicepath() =~ s'^.+/''r);
# get uuid
my $uuid = $fields{'Filesystem UUID'};
print STDERR "$self: called changepart for probing extfs on $part: uuid ". $uuid ."\n";
# this is probably not an extfs filesystem
return undef if (!defined $uuid || !$uuid);
# look or create part for extfs
my $p = $part->trychild($partstate, sub {
my $self = shift;
my $parameters = shift;
return ($self->uuid() eq $parameters->{uuid});
},'Extfs', {plugin => $self, uuid => $uuid, loaded => undef, saved => undef});
# extra properties
$p->prop('label', $fields{'Filesystem volume name'} =~ s'<none>''r);
$p->prop('features', split(' ', $fields{'Filesystem features'}));
$p->prop('options', split(' ', $fields{'Default mount options'}));
$p->prop('state', $fields{'Filesystem state'});
$p->prop('block_size', $fields{'Block size'});
$p->prop('block_count', $fields{'Block count'});
$p->prop('size', $fields{'Block size'} * $fields{'Block count'});
$p->changedpart($partstate);
}
## SAVE
# save the partition table
if ($partstate == ManaTools::Shared::disk_backend::Part->FutureState) {
# in all child parts, find PartitionTable entries and trigger ->save();
for my $p ($part->find_parts(undef, 'child')) {
# TODO: need to be able to abort during save!!!
$p->save();
}
}
return 1;
});
package ManaTools::Shared::disk_backend::Part::Extfs;
use Moose;
extends 'ManaTools::Shared::disk_backend::Part';
use MooseX::ClassAttribute;
with 'ManaTools::Shared::disk_backend::Mountable';
class_has '+type' => (
default => 'Extfs'
);
has 'uuid' => (
is => 'rw',
isa => 'Str',
required => 1,
trigger => sub {
my $self = shift;
my $value = shift;
$self->prop('uuid', $value);
}
);
class_has '+restrictions' => (
default => sub {
return {
parent => sub {
my $self = shift;
my $part = shift;
return $part->does('ManaTools::Shared::disk_backend::BlockDevice');
},
child => sub {
my $self = shift;
my $part = shift;
return $part->isa('ManaTools::Shared::disk_backend::Part::Mount');
},
sibling => sub {
my $self = shift;
my $part = shift;
return 0;
},
}
}
);
1;
|
