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package fs::dmraid; # $Id$
use diagnostics;
use strict;
#-######################################################################################
#- misc imports
#-######################################################################################
use common;
use modules;
use devices;
use fs::type;
use fs::wild_device;
use run_program;
init() or log::l("dmraid::init failed");
sub init() {
whereis_binary('dmraid') or die "dmraid not installed";
eval { modules::load('dm-mirror') };
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) = @_;
run_program::get_stdout('dmraid', $option);
}
sub check {
my ($in) = @_;
$in->do_pkgs->ensure_binary_is_installed('dmraid', 'dmraid') or return;
init();
1;
}
sub _raid_devices_raw() {
map {
chomp;
log::l("got: $_");
my %l; @l{qw(pv format vg level status size)} = split(':');
\%l;
} call_dmraid('-ccr');
}
sub _raid_devices() {
my @l = _raid_devices_raw();
my %vg2pv; push @{$vg2pv{$_->{vg}}}, delete $_->{pv} foreach @l;
map {
delete $_->{size}; #- now irrelevant
$_->{disks} = $vg2pv{$_->{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(':');
\%l;
} call_dmraid('-ccs');
}
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;
if (@l) {
log::l("ERROR: multiple match for set $name: " . join(' ', map { $_->{vg} } @l)) if @l > 1;
my ($raid) = @l;
add2hash($_, $raid);
} 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', prefix => $dev, bus => "dmraid_$_->{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);
} grep { $_->{status} eq 'ok' } _sets();
}
if ($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
'-ccs' => "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
'-ccr' => "/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
'-ccs' => "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
'-ccr' => "/dev/sda:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n" .
"/dev/sdb:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n",
},
);
*call_dmraid = sub {
my ($option) = @_;
my $s = $debug_data{$ENV{DRAKX_DEBUG_DMRAID}}{$option} or return;
split("\n", $s);
};
EOF
}
1;
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