package fs::dmraid; # $Id: dmraid.pm 265309 2010-01-27 00:28:23Z pterjan $ use diagnostics; use strict; #-###################################################################################### #- misc imports #-###################################################################################### use common; use modules; use devices; use fs::type; use fs::wild_device; use run_program; =head1 SYNOPSYS Manage fake RAIDs using dmraid =head1 Functions =over =item init() Load kernel modules, init device mapper then scan for fake RAIDs. =cut sub init() { whereis_binary('dmraid') or die "dmraid not installed"; eval { modules::load('dm-mirror', 'dm-zero') }; devices::init_device_mapper(); if ($::isInstall) { call_dmraid('-ay'); } 1; } #- call_dmraid is overloaded when debugging, see the end of this file sub call_dmraid { my ($option, @args) = @_; run_program::get_stdout('dmraid', $option, @args); } sub check { my ($in) = @_; $in->do_pkgs->ensure_binary_is_installed('dmraid', 'dmraid') or return; init(); 1; } sub _raid_devices_raw() { # get the real vg names, needed for ddf1, and safer than begins_with for raid10 log::l("_raid_devices_raw"); my %vgs; my %pv2vg = map { chomp(); log::l("got: $_"); my %l; @l{qw(name size stride level status subsets devs spares)} = split(':'); $vgs{$l{name}} = 1 if defined $l{spares}; if (/freeing device "(.*)", path "(.*)"/ && defined $vgs{$1}) { log::l("$2 => $1"); $2 => $1; } } call_dmraid(qw(-d -s -c -c)); map { chomp; log::l("got: $_"); my %l; @l{qw(pv format vg level status size)} = split(':'); if (defined $l{size} && defined $l{vg} && defined $pv2vg{$l{pv}} && !defined $vgs{$l{vg}}) { log::l("using $pv2vg{$l{pv}} instead of $l{vg}"); $l{vg} = $pv2vg{$l{pv}}; } if_(defined $l{size}, \%l); } call_dmraid(qw(-r -c -c)); } sub _raid_devices() { my @l = _raid_devices_raw(); my %vg2pv; push @{$vg2pv{$_->{vg}}}, delete $_->{pv} foreach @l; my %vg2status; push @{$vg2status{$_->{vg}}}, delete $_->{status} foreach @l; map { delete $_->{size}; #- now irrelevant $_->{disks} = $vg2pv{$_->{vg}}; $_->{status} = (every { $_ eq 'ok' } @{$vg2status{$_->{vg}}}) ? 'ok' : join(' ', @{$vg2status{$_->{vg}}}); $_; } uniq_ { $_->{vg} } @l; } sub _sets_raw() { map { chomp; log::l("got: $_"); my %l; @l{qw(name size stride level status subsets devs spares)} = split(':'); if_(defined $l{spares}, \%l); } call_dmraid('-s', '-c', '-c'); } sub _sets() { my @sets = _sets_raw(); my @raid_devices = _raid_devices(); foreach (@sets) { my $name = $_->{name}; my @l = grep { begins_with($name, $_->{vg}) } @raid_devices; log::l("ERROR: multiple match for set $name: " . join(' ', map { $_->{vg} } @l)) if @l > 1; @l = grep { begins_with($_->{vg}, $name) } @raid_devices if !@l; if (@l) { foreach my $raid (@l) { push @{$_->{disks}}, @{$raid->{disks}}; add2hash($_, $raid); $_->{status} = $raid->{status} if $_->{status} eq 'ok' && $::isInstall; } } else { log::l("ERROR: no matching raid devices for set $name"); } } @sets; } sub vgs() { map { my $dev = "mapper/$_->{name}"; my $vg = fs::wild_device::to_subpart("/dev/$dev"); add2hash($vg, { media_type => 'hd', bus => "dmraid_$_->{format}", disks => $_->{disks} }); #- device should exist, created by dmraid(8) using libdevmapper #- if it doesn't, we suppose it's not in use if (-e "/dev/$dev") { $vg; } else { log::l("ignoring $dev as /dev/$dev doesn't exist"); (); } } grep { if ($_->{status} eq 'ok') { 1; } else { call_dmraid('-an', $_->{vg}) if $::isInstall; #- for things like bad_sil below, deactivating half activated dmraid 0; } } _sets(); } # the goal is to handle migration from /dev/mapper/xxx1 to /dev/mapper/xxxp1, # as used by initrd/nash. # dmraid has been patched to follow xxxp1 device names. # so until the box has rebooted on new initrd/dmraid, we must cope with /dev/mapper/xxx1 device names # (cf #44182) sub migrate_device_names { my ($vg) = @_; my $dev_name = basename($vg->{device}); foreach (all('/dev/mapper')) { my ($nb) = /^\Q$dev_name\E(\d+)$/ or next; my $new = $dev_name . 'p' . $nb; if (! -e "/dev/mapper/$new") { log::l("migrating to $new, creating a compat symlink $_"); rename "/dev/mapper/$_", "/dev/mapper/$new"; symlink $new, "/dev/mapper/$_"; } } } if ($ENV{DRAKX_DEBUG_DMRAID}) { eval(<<'EOF'); my %debug_data = ( isw => { # dmraid -s #################### # *** Group superset isw_ffafgbdhi # --> Active Subset # name : isw_ffafgbdhi_toto # size : 234441216 # stride : 256 # type : mirror # status : ok # subsets: 0 # devs : 2 # spares : 0 '-s' => "isw_ffafgbdhi_toto:234441216:256:mirror:ok:0:2:0\n", # dmraid -r #################### #/dev/sda: isw, "isw_ffafgbdhi", GROUP, ok, 488397166 sectors, data@ 0 #/dev/sdb: isw, "isw_ffafgbdhi", GROUP, ok, 234441646 sectors, data@ 0 '-r' => "/dev/sda:isw:isw_ffafgbdhi:GROUP:ok:488397166:0\n" . "/dev/sdb:isw:isw_ffafgbdhi:GROUP:ok:234441646:0\n", }, pdc => { # dmraid -s #################### # *** Active Set # name : pdc_bcefbiigfg # size : 80043200 # stride : 128 # type : mirror # status : ok # subsets: 0 # devs : 2 # spares : 0 '-s' => "pdc_bcefbiigfg:80043200:128:mirror:ok:0:2:0\n", # dmraid -r #################### # /dev/sda: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0 # /dev/sdb: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0 '-r' => "/dev/sda:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n" . "/dev/sdb:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n", }, bad_sil => { '-s' => "sil_aeacdidecbcb:234439600:0:mirror:ok:0:1:0\n", # ERROR: sil: only 3/4 metadata areas found on /dev/sdb, electing... '-r' => "/dev/sdb:sil:sil_aeacdidecbcb:mirror:broken:234439600:0\n", # ERROR: sil: only 3/4 metadata areas found on /dev/sdb, electing... }, weird_nvidia => { '-s' => <<'EO', /dev/sda: "sil" and "nvidia" formats discovered (using nvidia)! /dev/sdb: "sil" and "nvidia" formats discovered (using nvidia)! nvidia_bcjdbjfa:586114702:128:mirror:ok:0:2:0 EO '-r' => <<'EO', /dev/sda: "sil" and "nvidia" formats discovered (using nvidia)! /dev/sdb: "sil" and "nvidia" formats discovered (using nvidia)! /dev/sda:nvidia:nvidia_bcjdbjfa:mirror:ok:586114702:0 /dev/sdb:nvidia:nvidia_bcjdbjfa:mirror:ok:586114702:0 EO # ERROR: multiple match for set nvidia_bcjdbjfa: nvidia_bcjdbjfa }, nvidia_with_subsets => { '-s' => <<'EO', nvidia_bfcciffh:625163520:128:raid10:ok:2:4:0 EO '-r' => <<'EO', /dev/sda:nvidia:nvidia_bfcciffh-0:stripe:ok:312581806:0 /dev/sdb:nvidia:nvidia_bfcciffh-0:stripe:ok:312581806:0 /dev/sdc:nvidia:nvidia_bfcciffh-1:stripe:ok:312581806:0 /dev/sdd:nvidia:nvidia_bfcciffh-1:stripe:ok:312581806:0 EO # ERROR: multiple match for set nvidia_bcjdbjfa: nvidia_bcjdbjfa }, ); *call_dmraid = sub { my ($option, @args) = @_; if (my $s = $debug_data{$ENV{DRAKX_DEBUG_DMRAID}}{$option}) { split("\n", $s); } else { warn "dmraid $option @args\n"; } }; EOF $@ and die; } =back =cut 1;