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package raid; # $Id$
use diagnostics;
use strict;
#-######################################################################################
#- misc imports
#-######################################################################################
use common;
use fs::type;
use run_program;
use devices;
use modules;
use fs;
sub max_nb() { 31 }
sub nb {
my ($nb) = @_;
first((ref($nb) ? $nb->{device} : $nb) =~ /(\d+)/);
}
sub new {
my ($raids, @parts) = @_;
my $nb = @$raids;
$raids->[$nb] = { 'chunk-size' => "64k", fs_type => 'ext3', disks => [ @parts ], device => "md$nb", notFormatted => 1, level => 1 };
foreach my $part (@parts) {
$part->{raid} = $nb;
delete $part->{mntpoint};
}
update($raids->[$nb]);
$nb;
}
sub add {
my ($raids, $part, $nb) = @_; $nb = nb($nb);
$raids->[$nb]{isMounted} and die N("Can't add a partition to _formatted_ RAID md%d", $nb);
inactivate_and_dirty($raids->[$nb]);
set_isFormatted($part, 0);
$part->{raid} = $nb;
delete $part->{mntpoint};
push @{$raids->[$nb]{disks}}, $part;
update($raids->[$nb]);
}
sub delete {
my ($raids, $nb) = @_;
$nb = nb($nb);
inactivate_and_dirty($raids->[$nb]);
delete $_->{raid} foreach @{$raids->[$nb]{disks}};
undef $raids->[$nb];
}
sub changeNb {
my ($raids, $oldnb, $newnb) = @_;
if ($oldnb != $newnb) {
inactivate_and_dirty($raids->[$_]) foreach $oldnb, $newnb;
($raids->[$newnb], $raids->[$oldnb]) = ($raids->[$oldnb], undef);
$raids->[$newnb]{device} = "md$newnb";
$_->{raid} = $newnb foreach @{$raids->[$newnb]{disks}};
}
$newnb;
}
sub removeDisk {
my ($raids, $part) = @_;
my $nb = nb($part->{raid});
inactivate_and_dirty($raids->[$nb]);
delete $part->{raid};
my $disks = $raids->[$nb]{disks};
@$disks = grep { $_ != $part } @$disks;
if (@$disks) {
update($raids->[$nb]);
} else {
undef $raids->[$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 $mod =~ /^\d+$/;
$mod;
}
sub update {
updateSize($_) foreach @_;
}
sub write {
my ($raids, $file) = @_;
return if $::testing;
output($file,
map {
my $s = sprintf(<<EOF, devices::make($_->{device}), $_->{level}, $_->{'chunk-size'}, int @{$_->{disks}});
raiddev %s
raid-level %s
chunk-size %s
persistent-superblock 1
nr-raid-disks %d
EOF
my @devs = map_index {
" device " . devices::make($_->{device}) . "\n raid-disk $::i\n";
} @{$_->{disks}};
$s, @devs
} grep { $_ } @$raids);
}
sub make {
my ($raids, $part) = @_;
return if is_active($part->{device});
inactivate_and_dirty($part);
isRAID($_) and make($raids, $_) foreach @{$part->{disks}};
my $dev = devices::make($part->{device});
eval { modules::load(module($part)) };
&write($raids, "/etc/raidtab");
run_program::run("mkraid", "--really-force", $dev) or die
$::isStandalone ? N("mkraid failed (maybe raidtools are missing?)") : N("mkraid failed");
}
sub format_part {
my ($raids, $part) = @_;
$part->{isFormatted} and return;
make($raids, $part);
fs::format::part_raw($part);
set_isFormatted($_, 1) foreach @{$part->{disks}};
}
sub verify {
my ($raids) = @_;
$raids or return;
foreach (grep { $_ } @$raids) {
@{$_->{disks}} >= ($_->{level} =~ /4|5/ ? 3 : 2) or die N("Not enough partitions for RAID level %d\n", $_->{level});
}
}
sub prepare_prefixed {
my ($raids, $prefix) = @_;
$raids or return;
&write($raids, "/etc/raidtab") if ! -e "/etc/raidtab";
eval { cp_af("/etc/raidtab", "$prefix/etc/raidtab") };
foreach (grep { $_ } @$raids) {
devices::make("$prefix/dev/$_->{device}") foreach @{$_->{disks}};
}
}
sub inactivate_and_dirty {
my ($part) = @_;
run_program::run("raidstop", devices::make($part->{device}));
set_isFormatted($part, 0);
}
sub active_mds() {
map { if_(/^(md\d+) /, $1) } cat_("/proc/mdstat");
}
sub is_active {
my ($dev) = @_;
member($dev, active_mds());
}
sub inactivate_all() { run_program::run("raidstop", devices::make($_)) foreach active_mds() }
1;
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