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package partition_table; # $Id$
use diagnostics;
use strict;
use common;
use fs::type;
use partition_table::raw;
use detect_devices;
use log;
sub hd2minimal_part {
my ($hd) = @_;
{
rootDevice => $hd->{device},
if_($hd->{usb_media_type}, is_removable => 1),
};
}
#- works for both hard drives and partitions ;p
sub description {
my ($hd) = @_;
my $win = $hd->{device_windobe};
sprintf "%s%s (%s)",
$hd->{device},
$win && " [$win:]",
join(', ',
grep { $_ }
formatXiB($hd->{totalsectors} || $hd->{size}, 512),
$hd->{info}, $hd->{mntpoint}, $hd->{fs_type});
}
sub adjustStartAndEnd {
my ($hd, $part) = @_;
$hd->adjustStart($part);
$hd->adjustEnd($part);
}
sub verifyNotOverlap {
my ($a, $b) = @_;
$a->{start} + $a->{size} <= $b->{start} || $b->{start} + $b->{size} <= $a->{start};
}
sub verifyInside {
my ($a, $b) = @_;
$b->{start} <= $a->{start} && $a->{start} + $a->{size} <= $b->{start} + $b->{size};
}
sub verifyParts_ {
foreach my $i (@_) {
foreach (@_) {
next if !$i || !$_ || $i == $_ || isWholedisk($i) || isExtended($i); #- avoid testing twice for simplicity :-)
if (isWholedisk($_)) {
verifyInside($i, $_) or
cdie sprintf("partition sector #$i->{start} (%s) is not inside whole disk (%s)!",
formatXiB($i->{size}, 512), formatXiB($_->{size}, 512));
} elsif (isExtended($_)) {
verifyNotOverlap($i, $_) or
log::l(sprintf("warning partition sector #$i->{start} (%s) is overlapping with extended partition!",
formatXiB($i->{size}, 512))); #- only warning for this one is acceptable
} else {
verifyNotOverlap($i, $_) or
cdie sprintf("partitions sector #$i->{start} (%s) and sector #$_->{start} (%s) are overlapping!",
formatXiB($i->{size}, 512), formatXiB($_->{size}, 512));
}
}
}
}
sub verifyParts {
my ($hd) = @_;
verifyParts_(get_normal_parts($hd));
}
sub verifyPrimary {
my ($pt) = @_;
$_->{start} > 0 || arch() =~ /^sparc/ || die "partition must NOT start at sector 0" foreach @{$pt->{normal}};
verifyParts_(@{$pt->{normal}}, $pt->{extended});
}
sub compute_device_name {
my ($part, $hd) = @_;
$part->{device} = $hd->{prefix} . $part->{part_number};
}
sub assign_device_numbers {
my ($hd) = @_;
my $i = 1;
my $start = 1;
#- on PPC we need to assign device numbers to the holes too - big FUN!
#- not if it's an IBM machine using a DOS partition table though
if (arch() =~ /ppc/ && detect_devices::get_mac_model() !~ /^IBM/) {
#- first sort the normal parts
$hd->{primary}{normal} = [ sort { $a->{start} <=> $b->{start} } @{$hd->{primary}{normal}} ];
#- now loop through them, assigning partition numbers - reserve one for the holes
foreach (@{$hd->{primary}{normal}}) {
if ($_->{start} > $start) {
log::l("PPC: found a hole on $hd->{prefix} before $_->{start}, skipping device...");
$i++;
}
$_->{part_number} = $i;
compute_device_name($_, $hd);
$start = $_->{start} + $_->{size};
$i++;
}
} else {
foreach (@{$hd->{primary}{raw}}) {
$_->{part_number} = $i;
compute_device_name($_, $hd);
$i++;
}
foreach (map { $_->{normal} } @{$hd->{extended} || []}) {
my $dev = $hd->{prefix} . $i;
my $renumbered = $_->{device} && $dev ne $_->{device};
if ($renumbered) {
require fs::mount;
eval { fs::mount::umount_part($_) }; #- at least try to umount it
will_tell_kernel($hd, del => $_, 'delay_del');
push @{$hd->{partitionsRenumbered}}, [ $_->{device}, $dev ];
}
$_->{part_number} = $i;
compute_device_name($_, $hd);
if ($renumbered) {
will_tell_kernel($hd, add => $_, 'delay_add');
}
$i++;
}
}
#- try to figure what the windobe drive letter could be!
#
#- first verify there's at least one primary dos partition, otherwise it
#- means it is a secondary disk and all will be false :(
#-
my ($c, @others) = grep { isFat_or_NTFS($_) } @{$hd->{primary}{normal}};
$i = ord 'C';
$c->{device_windobe} = chr($i++) if $c;
$_->{device_windobe} = chr($i++) foreach grep { isFat_or_NTFS($_) } map { $_->{normal} } @{$hd->{extended}};
$_->{device_windobe} = chr($i++) foreach @others;
}
sub remove_empty_extended {
my ($hd) = @_;
my $last = $hd->{primary}{extended} or return;
@{$hd->{extended}} = grep {
if ($_->{normal}) {
$last = $_;
} else {
%{$last->{extended}} = $_->{extended} ? %{$_->{extended}} : ();
}
$_->{normal};
} @{$hd->{extended}};
adjust_main_extended($hd);
}
sub adjust_main_extended {
my ($hd) = @_;
if (!is_empty_array_ref $hd->{extended}) {
my ($l, @l) = @{$hd->{extended}};
# the first is a special case, must recompute its real size
my $start = round_down($l->{normal}{start} - 1, $hd->{geom}{sectors});
my $end = $l->{normal}{start} + $l->{normal}{size};
my $only_linux = 1; my $has_win_lba = 0;
foreach (map { $_->{normal} } $l, @l) {
$start = min($start, $_->{start});
$end = max($end, $_->{start} + $_->{size});
$only_linux &&= isTrueLocalFS($_) || isSwap($_);
$has_win_lba ||= $_->{pt_type} == 0xc || $_->{pt_type} == 0xe;
}
$l->{start} = $hd->{primary}{extended}{start} = $start;
$l->{size} = $hd->{primary}{extended}{size} = $end - $start;
}
if (!@{$hd->{extended} || []} && $hd->{primary}{extended}) {
will_tell_kernel($hd, del => $hd->{primary}{extended});
%{$hd->{primary}{extended}} = (); #- modify the raw entry
delete $hd->{primary}{extended};
}
verifyParts($hd); #- verify everything is all right
}
sub adjust_local_extended {
my ($hd, $part) = @_;
my $extended = find { $_->{normal} == $part } @{$hd->{extended} || []} or return;
$extended->{size} = $part->{size} + $part->{start} - $extended->{start};
#- must write it there too because values are not shared
my $prev = find { $_->{extended}{start} == $extended->{start} } @{$hd->{extended} || []} or return;
$prev->{extended}{size} = $part->{size} + $part->{start} - $prev->{extended}{start};
}
sub get_normal_parts {
my ($hd) = @_;
@{$hd->{primary}{normal} || []}, map { $_->{normal} } @{$hd->{extended} || []};
}
sub get_normal_parts_and_holes {
my ($hd) = @_;
my ($start, $last) = ($hd->first_usable_sector, $hd->last_usable_sector);
ref($hd) or print("get_normal_parts_and_holes: bad hd" . backtrace(), "\n");
my $minimal_hole = put_in_hash({ pt_type => 0 }, hd2minimal_part($hd));
my @l = map {
my $current = $start;
$start = $_->{start} + $_->{size};
my $hole = { start => $current, size => $_->{start} - $current, %$minimal_hole };
put_in_hash($hole, hd2minimal_part($hd));
$hole, $_;
} sort { $a->{start} <=> $b->{start} } grep { !isWholedisk($_) } get_normal_parts($hd);
push @l, { start => $start, size => min($last - $start, $hd->max_partition_size), %$minimal_hole } if $start < $hd->max_partition_start;
grep { !isEmpty($_) || $_->{size} >= $hd->cylinder_size } @l;
}
sub _default_type {
my ($hd) = @_;
arch() =~ /ia64/ ? 'gpt' :
arch() eq "alpha" ? "bsd" :
arch() =~ /^sparc/ ? "sun" :
arch() eq "ppc" && detect_devices::get_mac_model() !~ /^IBM/ ? "mac" :
$hd->{totalsectors} > 4 * 1024 * 1024 * 2048 ? 'lvm' : "dos"; #- default to LVM on full disk when >4TB
}
sub initialize {
my ($hd, $o_type) = @_;
my $type = $o_type || _default_type($hd);
require "partition_table/$type.pm";
"partition_table::$type"->initialize($hd);
delete $hd->{extended};
if (detect_devices::is_xbox()) {
my $part = { start => 1, size => 15632048, pt_type => 0x0bf, isFormatted => 1 };
partition_table::dos::compute_CHS($hd, $part);
$hd->{primary}{raw}[0] = $part;
}
}
sub read_primary {
my ($hd) = @_;
#- it can be safely considered that the first sector is used to probe the partition table
#- but other sectors (typically for extended partition ones) have to match this type!
my @parttype = (
if_(arch() =~ /^ia64/, 'gpt'),
arch() =~ /^sparc/ ? ('sun', 'bsd') : ('dos', 'lvm', 'bsd', 'sun', 'mac'),
);
foreach ('empty', @parttype, 'unknown') {
/unknown/ and die "unknown partition table format on disk " . $hd->{file};
# perl_checker: require partition_table::bsd
# perl_checker: require partition_table::dos
# perl_checker: require partition_table::empty
# perl_checker: require partition_table::lvm
# perl_checker: require partition_table::gpt
# perl_checker: require partition_table::mac
# perl_checker: require partition_table::sun
require "partition_table/$_.pm";
bless $hd, "partition_table::$_";
if ($hd->read_primary) {
log::l("found a $_ partition table on $hd->{file} at sector 0");
return 1;
}
}
0;
}
sub read {
my ($hd) = @_;
read_primary($hd) or return 0;
eval {
my $need_removing_empty_extended;
if ($hd->{primary}{extended}) {
read_extended($hd, $hd->{primary}{extended}, \$need_removing_empty_extended) or return 0;
}
if ($need_removing_empty_extended) {
#- special case when hda5 is empty, it must be skipped
#- (windows XP generates such partition tables)
remove_empty_extended($hd); #- includes adjust_main_extended
}
};
die "extended partition: $@" if $@;
assign_device_numbers($hd);
remove_empty_extended($hd);
$hd->set_best_geometry_for_the_partition_table;
1;
}
sub read_extended {
my ($hd, $extended, $need_removing_empty_extended) = @_;
my $pt = do {
my ($pt, $info) = $hd->read_one($extended->{start}) or return 0;
partition_table::raw::pt_info_to_primary($hd, $pt, $info);
};
$pt = { %$extended, %$pt };
push @{$hd->{extended}}, $pt;
@{$hd->{extended}} > 100 and die "oops, seems like we're looping here :( (or you have more than 100 extended partitions!)";
if (@{$pt->{normal}} == 0) {
$$need_removing_empty_extended = 1;
delete $pt->{normal};
print "need_removing_empty_extended\n";
} elsif (@{$pt->{normal}} > 1) {
die "more than one normal partition in extended partition";
|