diff options
Diffstat (limited to 'perl-install/lvm.pm')
| -rw-r--r-- | perl-install/lvm.pm | 187 |
1 files changed, 165 insertions, 22 deletions
diff --git a/perl-install/lvm.pm b/perl-install/lvm.pm index 48abf5c84..bf212bd6f 100644 --- a/perl-install/lvm.pm +++ b/perl-install/lvm.pm @@ -1,4 +1,4 @@ -package lvm; # $Id$ +package lvm; use diagnostics; use strict; @@ -12,13 +12,24 @@ use devices; use fs::type; use run_program; +=head1 SYNOPSYS + +Manage LVM (PV, VG, LV) + +=head1 Functions + +=over 4 + +=cut + #- for partition_table_xxx emulation sub new { my ($class, $name) = @_; - $name =~ s/\W/_/g; + $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; + bless { disks => [], VG_name => $name, device => $name }, $class; } +sub use_pt_type { 0 } sub hasExtended { 0 } sub adjustStart {} sub adjustEnd {} @@ -28,17 +39,38 @@ sub cylinder_size { $hd->{extent_size}; } -init() or log::l("lvm::init failed"); +=item detect_durting_install() + +Explicitly scan VGs. + +=cut + +sub detect_during_install() { + run_program::run('lvm2', 'vgscan'); + run_program::run('lvm2', 'vgchange', '-a', 'y'); +} + +=item init() + +Loads LVM modules and scan VGs (if in installer, not in standalone tool). + +=cut sub init() { devices::init_device_mapper(); - if ($::isInstall) { - run_program::run('lvm2', 'vgscan'); - run_program::run('lvm2', 'vgchange', '-a', 'y'); - } + detect_during_install() if $::isInstall || $::isLiveInstall; 1; } +init() or log::l("lvm::init failed"); + +=item lvm_cmd(...) + +Run a LVM command, then rescan VG. +See run_program::run() for arguments. + +=cut + sub lvm_cmd { if (my $r = run_program::run('lvm2', @_)) { $r; @@ -46,27 +78,54 @@ sub lvm_cmd { $? >> 8 == 98 or return; #- sometimes, it needs running vgscan again, doing so: + log::l("forcing rescan because of prior failure"); run_program::run('lvm2', 'vgscan'); run_program::run('lvm2', @_); } } + +=item lvm_cmd_or_die($prog, @para) + +Like lvm_cmd() but die if there's an error. + +=cut + sub lvm_cmd_or_die { my ($prog, @para) = @_; - lvm_cmd($prog, @para) or die "$prog failed\n"; + my @err; + lvm_cmd("2>", \@err, $prog, @para) or do { + my $err = $err[-1]; # prevent "Modification of non-creatable array value attempted" + chomp($err); + die "$prog failed: $err\n"; + }; } sub check { - my ($in) = @_; - - $in->do_pkgs->ensure_binary_is_installed('lvm2', 'lvm2') or return; + my ($do_pkgs) = @_; + local $::prefix = ''; # We want lvm2 on current system + $do_pkgs->ensure_binary_is_installed('lvm2', 'lvm2') or return; init(); 1; } -sub get_vg { - my ($part) = @_; - my $dev = expand_symlinks(devices::make($part->{device})); - run_program::get_stdout('lvm2', 'pvs', '--noheadings', '-o', 'vg_name', $dev) =~ /(\S+)/ && $1; +sub get_pv_field { + my ($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', $dev) or die N("Moving used physical extents to other physical volumes failed"); } sub update_size { @@ -80,6 +139,21 @@ sub get_lv_size { to_int(run_program::get_stdout('lvm2', 'lvs', '--noheadings', '--nosuffix', '--units', 's', '-o', 'lv_size', "/dev/$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($lv)); +} + +=item get_lvs($lvm) + +Return list of LVs. + +=cut + 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; @@ -87,12 +161,20 @@ sub get_lvs { [ map { my $device = "$lvm->{VG_name}/$_"; - my $fs_type = -e "/dev/$device" && fs::type::fs_type_from_magic({ device => $device }); - - { device => $device, + my $p = fs::wild_device::to_subpart("/dev/$device"); + my $part = { + device => $device, lv_name => $_, - fs_type => $fs_type || 'ext2', + rootDevice => $lvm->{VG_name}, + minor => $p->{minor}, + major => $p->{major}, size => get_lv_size($device) }; + if (my $type = -e "/dev/$device" && fs::type::type_subpart_from_magic($part)) { + put_in_hash($part, $type); + } else { + $part->{fs_type} = defaultFS(); + } + $part; } @l ]; } @@ -100,11 +182,22 @@ sub get_lvs { sub vg_add { my ($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 ($lvm) = @_; @@ -127,14 +220,37 @@ sub lv_delete { @$list = grep { $_ != $lv } @$list; } -sub lv_create { +sub suggest_lv_name_from_mnt_point { + my ($lv) = @_; + my $str = $lv->{mntpoint}; + $str = "root" if $str eq '/'; + $str =~ s!^/!!; + $str =~ s!/!_!g; + $str =~ s! !_!g; + 'lv_' . $str; +} + +sub suggest_lv_name { my ($lvm, $lv) = @_; my $list = $lvm->{primary}{normal} ||= []; - $lv->{lv_name} ||= 1 + max(map { if_($_->{device} =~ /(\d+)$/, $1) } @$list); + $lv->{lv_name} ||= suggest_lv_name_from_mnt_point($lv); + $lv->{lv_name} ||= "lv_" . (1 + max(map { if_($_->{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; } @@ -145,4 +261,31 @@ sub lv_resize { $lv->{size} = get_lv_size($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); +} + +=back + +=cut + 1; |