1 # Copyright (c) 2010-2012 Zmanda, Inc. All Rights Reserved.
3 # This program is free software; you can redistribute it and/or modify it
4 # under the terms of the GNU General Public License version 2 as published
5 # by the Free Software Foundation.
7 # This program is distributed in the hope that it will be useful, but
8 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
9 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 # You should have received a copy of the GNU General Public License along
13 # with this program; if not, write to the Free Software Foundation, Inc.,
14 # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 # Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
17 # Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
19 package Amanda::Taper::Scan::oldest;
23 Amanda::Taper::Scan::oldest
27 This package implements the "oldest" taperscan algorithm. See
28 C<amanda-taperscan(7)>.
34 use base qw( Amanda::ScanInventory Amanda::Taper::Scan );
40 use base qw(Exporter);
41 our @EXPORT_OK = qw($DEFAULT_CHANGER);
45 use Amanda::Device qw( :constants );
46 use Amanda::Debug qw( debug );
49 use Amanda::Interactivity;
50 use Amanda::Taper::Scan::traditional;
52 our $DEFAULT_CHANGER = {};
58 my $chg = $params{'changer'};
60 $chg = Amanda::Changer->new();
61 $params{'changer'} = $chg;
63 if (!$chg->have_inventory()) {
64 return Amanda::Taper::Scan::traditional->new(%params);
66 my $self = Amanda::ScanInventory->new(%params);
67 return bless ($self, $class);
72 return $self->oldest_reusable_volume();
75 sub first_reusable_label {
80 for my $tle (@{$self->{'tapelist'}->{'tles'}}) {
81 $label = $tle->{'label'} if $self->is_reusable_volume(label => $tle->{'label'});
89 my $tles = $self->{'tapelist'}->{tles};
90 my $label = $tles->[0]->{'label'};
95 my $inventory = shift;
102 my $first_new_volume;
108 my $label = $self->most_prefered();
109 $self->{'most_prefered_label'} = $label;
111 for my $i (0..(scalar(@$inventory)-1)) {
112 my $sl = $inventory->[$i];
113 if ($sl->{current}) {
116 next if $seen->{$sl->{slot}} and (!$res || $res->{'this_slot'} ne $sl->{'slot'});
118 if (!defined $sl->{'state'} ||
119 $sl->{'state'} == Amanda::Changer::SLOT_UNKNOWN) {
120 $first_unknown = $sl if !$first_unknown;
121 $unknown = $sl if $current && !$unknown;
122 } elsif ($sl->{'state'} == Amanda::Changer::SLOT_EMPTY) {
123 } elsif (defined $sl->{'label'}) {
124 if ($label && $sl->{'label'} eq $label) {
125 $most_prefered = $sl;
126 } elsif ($self->is_reusable_volume(label => $sl->{'label'})) {
129 my $vol_tle = $self->{'tapelist'}->lookup_tapelabel($sl->{'label'});
131 if ($vol_tle->{'datestamp'} eq '0') {
132 push @new_labeled, $sl;
134 } elsif ($self->volume_is_labelable($sl)) {
135 $first_new_volume = $sl if !$first_new_volume;
136 $new_volume = $sl if $current && !$new_volume;
137 push @new_volume, $sl;
140 } elsif ($self->volume_is_labelable($sl)) {
141 $first_new_volume = $sl if !$first_new_volume;
142 $new_volume = $sl if $current && !$new_volume;
143 push @new_volume, $sl;
144 } elsif (!defined($sl->{device_status}) && !defined($sl->{label})) {
145 $first_unknown = $sl if !$first_unknown;
146 $unknown = $sl if $current && !$unknown;
150 $unknown = $first_unknown if !defined $unknown;
151 $new_volume = $first_new_volume if !defined $new_volume;
153 my $first_label = $self->first_reusable_label();
154 my $last_label = $self->last_use_label();
157 for my $sl (@reusable) {
158 my $tle = $self->{'tapelist'}->lookup_tapelabel($sl->{'label'});
159 $sl->{'datestamp'} = $tle->{'datestamp'};
160 $reusable = $sl if !defined $reusable or
161 $sl->{'datestamp'} < $reusable->{'datestamp'};
165 for my $sl (@new_labeled) {
166 $new_labeled = $sl if !defined $new_labeled or
168 $sl->{'label'} lt $new_labeled->{'label'}) or
170 $sl->{'label'} gt $last_label and
171 $sl->{'label'} lt $new_labeled->{'label'}) or
173 $sl->{'label'} gt $last_label and
174 $new_labeled->{'label'} lt $last_label) or
176 $new_labeled->{'label'} lt $last_label and
177 $sl->{'label'} lt $new_labeled->{'label'});
180 for my $sl (@new_volume) {
181 $sl->{'label'} = $self->{'chg'}->make_new_tape_label(
182 barcode => $sl->{'barcode'},
183 slot => $sl->{'slot'},
184 meta => $sl->{'meta'});
185 $new_volume = $sl if defined $last_label and
186 $new_volume->{'label'} ne $sl->{'label'} and
187 (($sl->{'label'} gt $last_label and
188 $sl->{'label'} lt $new_volume->{'label'}) or
189 ($sl->{'label'} gt $last_label and
190 $new_volume->{'label'} lt $last_label) or
191 ($new_volume->{'label'} lt $last_label and
192 $sl->{'label'} lt $new_volume->{'label'}));
196 if ($new_labeled && $self->{'scan_conf'}->{'new_labeled'} eq 'soon') {
198 } elsif ($new_volume && $self->{'scan_conf'}->{'new_volume'} eq 'soon') {
200 } elsif ($new_labeled &&
201 $self->{'scan_conf'}->{'new_labeled'} eq 'order' and
202 (!$label || !$first_label || !$last_label || !$most_prefered or
203 ($last_label and $most_prefered and
204 $new_labeled->{'label'} gt $last_label and
205 $new_labeled->{'label'} lt $most_prefered->{'label'}) or
206 ($last_label and $most_prefered and
207 $new_labeled->{'label'} gt $last_label and
208 $most_prefered->{'label'} lt $last_label) or
209 ($first_label and $most_prefered and
210 $new_labeled->{'label'} lt $first_label and
211 $new_labeled->{'label'} lt $most_prefered->{'label'}))) {
213 } elsif ($new_volume and
214 $self->{'scan_conf'}->{'new_volume'} eq 'order' and
215 (!$label || !$first_label || !$last_label || !$most_prefered or
216 ($last_label and $most_prefered and
217 $new_volume->{'label'} gt $last_label and
218 $new_volume->{'label'} lt $most_prefered->{'label'}) or
219 ($last_label and $most_prefered and
220 $new_volume->{'label'} gt $last_label and
221 $most_prefered->{'label'} lt $last_label) or
222 ($first_label and $most_prefered and
223 $new_volume->{'label'} lt $first_label and
224 $new_volume->{'label'} lt $most_prefered->{'label'}))) {
226 } elsif (defined $most_prefered) {
227 $use = $most_prefered;
228 } elsif (defined $reusable) {
230 } elsif ($new_labeled and $self->{'scan_conf'}->{'new_labeled'} eq 'last') {
232 } elsif ($new_volume and $self->{'scan_conf'}->{'new_volume'} eq 'last') {
237 if (defined $res and $res->{'this_slot'} eq $use->{'slot'}) {
238 return (Amanda::ScanInventory::SCAN_DONE);
240 return (Amanda::ScanInventory::SCAN_LOAD,
243 } elsif ($unknown and $self->{'scan_conf'}->{'scan'}) {
244 return (Amanda::ScanInventory::SCAN_LOAD,
246 } elsif ($self->{'scan_conf'}->{'ask'}) {
247 return (Amanda::ScanInventory::SCAN_ASK_POLL);
249 return (Amanda::ScanInventory::SCAN_FAIL);