1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
package lvm; # $Id$
use diagnostics;
use strict;
#-######################################################################################
#- misc imports
#-######################################################################################
use common;
use modules;
use devices;
use fs::type;
use run_program;
#- for partition_table_xxx emulation
sub new {
my ($class, $name) = @_;
$name =~ s/[^\w-]/_/g;
$name = substr($name, 0, 63); # max length must be < NAME_LEN / 2 where NAME_LEN is 128
bless { disks => [], VG_name => $name }, $class;
}
sub use_pt_type { 0 }
sub hasExtended { 0 }
sub adjustStart {}
sub adjustEnd {}
sub write {}
sub cylinder_size {
my ($hd) = @_;
$hd->{extent_size};
}
init() or log::l("lvm::init failed");
sub detect_during_install() {
run_program::run('lvm2', 'vgscan');
run_program::run('lvm2', 'vgchange', '-a', 'y');
}
sub init() {
devices::init_device_mapper();
detect_during_install() if $::isInstall;
1;
}
sub lvm_cmd {
if (my $r = run_program::run('lvm2', @_)) {
$r;
} else {
$? >> 8 == 98 or return;
#- sometimes, it needs running vgscan again, doing so:
run_program::run('lvm2', 'vgscan');
run_program::run('lvm2', @_);
}
}
sub lvm_cmd_or_die {
my ($prog, @para) = @_;
lvm_cmd($prog, @para) or die "$prog failed\n";
}
sub check {
my ($do_pkgs) = @_;
local $::prefix = ''; # We want lvm2 on current system
$do_pkgs->ensure_binary_is_installed('lvm2', 'lvm2') or return;
init();
1;
}
sub get_pv_field {
my ($pv, $field) = @_;
my $dev = expand_symlinks(devices::make($pv->{device}));
run_program::get_stdout('lvm2', 'pvs', '--noheadings', '--nosuffix', '-o', $field, $dev);
}
sub pv_physical_extents {
my ($pv) = @_;
split(' ', lvm::get_pv_field($pv, 'pv_pe_alloc_count,pv_pe_count'));
}
sub pv_to_vg {
my ($pv) = @_;
get_pv_field($pv, 'vg_name') =~ /(\S+)/ && $1;
}
sub pv_move {
my ($pv) = @_;
my $dev = expand_symlinks(devices::make($pv->{device}));
lvm_cmd('pvmove', '-v', $dev) or die N("Moving used physical extents to other physical volumes failed");
}
sub update_size {
my ($lvm) = @_;
$lvm->{extent_size} = to_int(run_program::get_stdout('lvm2', 'vgs', '--noheadings', '--nosuffix', '--units', 's', '-o', 'vg_extent_size', $lvm->{VG_name}));
$lvm->{totalsectors} = to_int(run_program::get_stdout('lvm2', 'vgs', '--noheadings', '--nosuffix', '--units', 's', '-o', 'vg_size', $lvm->{VG_name}));
}
sub get_lv_size {
my ($lvm_device) = @_;
to_int(run_program::get_stdout('lvm2', 'lvs', '--noheadings', '--nosuffix', '--units', 's', '-o', 'lv_size', "/dev/$lvm_device"));
}
sub lv_to_pvs {
my ($lv) = @_;
map { m!(\S+)\(! } run_program::get_stdout('lvm2', 'lvs', '--noheadings', '-o', 'devices', "/dev/$lv->{device}");
}
sub lv_nb_pvs {
my ($lv) = @_;
listlength(lv_to_pvs($lv));
}
sub get_lvs {
my ($lvm) = @_;
my @l = run_program::get_stdout('lvm2', 'lvs', '--noheadings', '--nosuffix', '--units', 's', '-o', 'lv_name', $lvm->{VG_name}) =~ /(\S+)/g;
$lvm->{primary}{normal} =
[
map {
my $device = "$lvm->{VG_name}/$_";
my $part = {
device => $device,
lv_name => $_,
rootDevice => $lvm->{VG_name},
size => get_lv_size($device) };
if (my $type = -e "/dev/$device" && fs::type::type_subpart_from_magic($part)) {
put_in_hash($part, $type);
} else {
$part->{fs_type} = 'ext2';
}
$part;
} @l
];
}
sub vg_add {
my ($part) = @_;
my $dev = expand_symlinks(devices::make($part->{device}));
output($dev, '\0' x 512); #- help pvcreate
lvm_cmd_or_die('pvcreate', '-y', '-ff', $dev);
my $prog = lvm_cmd('vgs', $part->{lvm}) ? 'vgextend' : 'vgcreate';
lvm_cmd_or_die($prog, $part->{lvm}, $dev);
}
sub vg_reduce {
my ($lvm_vg, $part_pv) = @_;
lvm_cmd('vgreduce', $lvm_vg->{VG_name}, devices::make($part_pv->{device})) or die N("Physical volume %s is still in use", $part_pv->{device});
@{$lvm_vg->{disks}} = difference2($lvm_vg->{disks}, [ $part_pv ]);
update_size($lvm_vg);
delete $part_pv->{lvm};
set_isFormatted($part_pv, 0);
}
sub vg_destroy {
my ($lvm) = @_;
is_empty_array_ref($lvm->{primary}{normal}) or die N("Remove the logical volumes first\n");
lvm_cmd('vgchange', '-a', 'n', $lvm->{VG_name});
lvm_cmd_or_die('vgremove', $lvm->{VG_name});
foreach (@{$lvm->{disks}}) {
lvm_cmd_or_die('pvremove', devices::make($_->{device}));
delete $_->{lvm};
set_isFormatted($_, 0);
}
}
sub lv_delete {
my ($lvm, $lv) = @_;
lvm_cmd_or_die('lvremove', '-f', "/dev/$lv->{device}");
my $list = $lvm->{primary}{normal};
@$list = grep { $_ != $lv } @$list;
}
sub suggest_lv_name {
my ($lvm, $lv) = @_;
my $list = $lvm->{primary}{normal} ||= [];
$lv->{lv_name} ||= 1 + max(map { if_($_->{device} =~ /(\d+)$/, $1) } @$list);
}
sub lv_create {
my ($lvm, $lv) = @_;
suggest_lv_name($lvm, $lv);
$lv->{device} = "$lvm->{VG_name}/$lv->{lv_name}";
lvm_cmd_or_die('lvcreate', '--size', int($lv->{size} / 2) . 'k', '-n', $lv->{lv_name}, $lvm->{VG_name});
if ($lv->{mntpoint} eq '/boot' && lv_nb_pvs($lv) > 1) {
lvm_cmd_or_die('lvremove', '-f', "/dev/$lv->{device}");
die N("The bootloader can't handle /boot on multiple physical volumes");
}
$lv->{size} = get_lv_size($lv->{device}); #- the created size is smaller than asked size
set_isFormatted($lv, 0);
my $list = $lvm->{primary}{normal} ||= [];
push @$list, $lv;
}
sub lv_resize {
my ($lv, $oldsize) = @_;
lvm_cmd_or_die($oldsize > $lv->{size} ? ('lvreduce', '-f') : 'lvextend',
'--size', int($lv->{size} / 2) . 'k', "/dev/$lv->{device}");
$lv->{size} = get_lv_size($lv->{device}); #- the resized partition may not be the exact asked size
}
sub add_to_VG {
my ($part, $lvm) = @_;
$part->{lvm} = $lvm->{VG_name};
push @{$lvm->{disks}}, $part;
delete $part->{mntpoint};
vg_add($part);
update_size($lvm);
}
sub create_singleton_vg {
my ($lvms, $part) = @_;
my %existing = map { $_->{VG_name} => 1 } @$lvms;
my $VG_name = find { !$existing{$_} } map { "VG$_" } 1 .. 100 or internal_error();
my $lvm = new lvm($VG_name);
push @$lvms, $lvm;
add_to_VG($part, $lvm);
}
1;
|
