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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, device => $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;
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