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package raid;
use diagnostics;
use strict;
#-######################################################################################
#- misc imports
#-######################################################################################
use common qw(:common :functional);
use run_program;
use devices;
use commands;
use fs;
sub nb($) {
my ($nb) = @_;
first((ref $nb ? $nb->{device} : $nb) =~ /(\d+)/);
}
sub is($) {
my ($part) = @_;
$part->{device} =~ /^md/;
}
sub new($$) {
my ($raid, $part) = @_;
my $nb = @$raid;
$raid->[$nb] = { 'chunk-size' => "64k", type => 0x83, disks => [ $part ], device => "md$nb", notFormatted => 1 };
$part->{raid} = $nb;
delete $part->{mntpoint};
$nb;
}
sub add($$$) {
my ($raid, $part, $nb) = @_; $nb = nb($nb);
$raid->[$nb]{isMounted} and die _("Can't add a partition to _formatted_ RAID md%d", $nb);
$part->{raid} = $nb;
delete $part->{mntpoint};
push @{$raid->[$nb]{disks}}, $part;
}
sub delete($$) {
my ($raid, $nb) = @_;
$nb = nb($nb);
delete $_->{raid} foreach @{$raid->[$nb]{disks}};
undef $raid->[$nb];
}
sub changeNb($$$) {
my ($raid, $oldnb, $newnb) = @_;
if ($oldnb != $newnb) {
($raid->[$newnb], $raid->[$oldnb]) = ($raid->[$oldnb], undef);
$raid->[$newnb]{device} = "md$newnb";
$_->{raid} = $newnb foreach @{$raid->[$newnb]{disks}};
}
$newnb;
}
sub removeDisk($$) {
my ($raid, $part) = @_;
my $nb = nb($part->{raid});
run_program::run("raidstop", devices::make($part->{device}));
delete $part->{raid};
@{$raid->[$nb]{disks}} = grep { $_ != $part } @{$raid->[$nb]{disks}};
update($raid->[$nb]);
}
sub updateSize($) {
my ($part) = @_;
local $_ = $part->{level};
my @l = map { $_->{size} } @{$part->{disks}};
$part->{size} = do {
if (/0|linear/) { sum @l }
elsif (/1/ ) { min @l }
elsif (/4|5/) { min(@l) * $#l }
};
}
sub module($) {
my ($part) = @_;
my $mod = $part->{level};
$mod = 5 if $mod eq "4";
$mod = "raid$mod" if $mod =~ /^\d+$/;
$mod;
}
sub updateIsFormatted($) {
my ($part) = @_;
$part->{isFormatted} = and_ map { $_->{isFormatted} } @{$part->{disks}};
$part->{notFormatted} = and_ map { $_->{notFormatted} } @{$part->{disks}};
}
sub update {
foreach (@_) {
updateSize($_);
updateIsFormatted($_);
}
}
sub write($) {
my ($raid, $file) = @_;
local *F;
local $\ = "\n";
open F, ">$file" or die _("Can't write file $file");
foreach (grep {$_} @$raid) {
print F <<"EOF";
raiddev /dev/$_->{device}
raid-level $_->{level}
chunk-size $_->{'chunk-size'}
persistent-superblock 1
EOF
print F "nr-raid-disks ", int @{$_->{disks}};
map_index {
print F " device ", devices::make($_->{device});
print F " raid-disk $::i";
} @{$_->{disks}};
}
}
sub make {
my ($raid, $part) = @_;
is($_) and make($raid, $_) foreach @{$part->{disks}};
my $dev = devices::make($part->{device});
eval { commands::modprobe(module($part)) };
run_program::run("raidstop", $dev);
&write($raid, "/etc/raidtab");
run_program::run("mkraid", "--really-force", $dev);
}
sub format_part($$) {
my ($raid, $part) = @_;
make($raid->{raid}, $part);
fs::real_format_part($part);
$_->{isFormatted} = 1 foreach @{$part->{disks}};
}
sub verify($) {
my ($raid) = @_;
$raid && $raid->{raid} or return;
foreach (grep {$_} @{$raid->{raid}}) {
@{$_->{disks}} >= ($_->{level} =~ /4|5/ ? 3 : 2) or die _("Not enough partitions for RAID level %d\n", $_->{level});
}
}
sub prepare_prefixed($$) {
my ($raid, $prefix) = @_;
$raid && $raid->{raid} or return;
eval { commands::cp("-f", "/etc/raidtab", "$prefix/etc/raidtab") };
foreach (@{$raid->{raid}}) {
devices::make("$prefix/dev/$_->{device}") foreach @{$_->{disks}};
}
}
sub stopAll() { run_program::run("raidstop", devices::make("md$_")) foreach 0..7 }
1;
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