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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
=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;
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