Rewrite gpt support with libparted

1 files changed, 38 insertions, 228 deletions

diff --git a/perl-install/partition_table/gpt.pm b/perl-install/partition_table/gpt.pm
index 5c46e25ca..10eab253b 100644
--- a/perl-install/partition_table/gpt.pm
+++ b/perl-install/partition_table/gpt.pm
@@ -6,263 +6,73 @@ use vars qw(@ISA);
 
 @ISA = qw(partition_table::raw);
 
-use common;
 use partition_table::raw;
-use partition_table::dos;
-use partition_table;
-use fs::type;
 use c;
 
-my %gpt_types = (
-  0x00 => "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
-  0x82 => "\x6d\xfd\x57\x06\xab\xa4\xc4\x43\x84\xe5\x09\x33\xc8\x4b\x4f\x4f",
-  0x83 => "\xA2\xA0\xD0\xEB\xE5\xB9\x33\x44\x87\xC0\x68\xB6\xB7\x26\x99\xC7",
-  0x8e => "\x79\xd3\xd6\xe6\x07\xf5\xc2\x44\xa2\x3c\x23\x8f\x2a\x3d\xf9\x28",
-  0xfd => "\x0f\x88\x9d\xa1\xfc\x05\x3b\x4d\xa0\x06\x74\x3f\x0f\x84\x91\x1e",
-  0xef => "\x28\x73\x2A\xC1\x1F\xF8\xd2\x11\xBA\x4B\x00\xA0\xC9\x3E\xC9\x3B",
-  # legacy_partition_table => "\x41\xEE\x4D\x02\xE7\x33\xd3\x11\x9D\x69\x00\x08\xC7\x81\xF3\x9F"
-  # PARTITION_MSFT_RESERVED_GUID "\x16\xE3\xC9\xE3\x5C\x0B\xB8\x4D\x81\x7D\xF9\x2D\xF0\x02\x15\xAE"
-  #PARTITION_RESERVED_GUID "\x39\x33\xa6\x8d\x07\x00\xc0\x60\xc4\x36\x08\x3a\xc8\x23\x09\x08"
-);
-
-my $current_revision = 0x00010200;
-my ($main_format, $main_fields) = list2kv(
-  a8    => 'magic',
-  V     => 'revision',
-  V     => 'headerSize',
-  V     => 'headerCRC32',
-  a4    => 'blank1',
-  Q     => 'myLBA',
-  Q     => 'alternateLBA',
-  Q     => 'firstUsableLBA',
-  Q     => 'lastUsableLBA',
-  a16   => 'guid',
-  Q     => 'partitionEntriesLBA',
-  V     => 'nbPartitions',
-  V     => 'partitionEntrySize',
-  V     => 'partitionEntriesCRC32',
-);
-
-my ($partitionEntry_format, $partitionEntry_fields) = list2kv(
-  a16   => 'gpt_type',
-  a16   => 'guid',
-  Q     => 'start',
-  Q     => 'ending',
-  a8    => 'efi_attributes',
-  a72   => 'name',
-);
-
-my ($guid_format, $guid_fields) = list2kv(
-  N     => 'time_low',
-  n     => 'time_mid',
-  n     => 'time_hi_and_version',
-  n     => 'clock_seq',
-  a6    => 'node',
-);
-
-$_ = join('', @$_) foreach $main_format, $partitionEntry_format, $guid_format;
-
-my $magic = "EFI PART";
-
-sub generate_guid() {
-    my $tmp;
-    open(my $F, devices::make("random")) or die "Could not open /dev/random for GUID generation";
-    read $F, $tmp, psizeof($guid_format);
-	
-    my %guid; @guid{@$guid_fields} = unpack $guid_format, $tmp;
-    $guid{clock_seq} = ($guid{clock_seq} & 0x3fff) | 0x8000;
-    $guid{time_hi_and_version} = ($guid{time_hi_and_version} & 0x0fff) | 0x4000;
-    pack($guid_format, @guid{@$guid_fields});
-}
-
-sub crc32 {
-    my ($buffer) = @_;
-
-    my $crc = 0xFFFFFFFF;
-    foreach (unpack "C*", $buffer) {
-	my $subcrc = ($crc ^ $_) & 0xFF;
-        for (my $j = 8; $j > 0; $j--) {
-	    my $b = $subcrc & 1;
-	    $subcrc = ($subcrc >> 1) & 0x7FFFFFFF;
-	    $subcrc = $subcrc ^ 0xEDB88320 if $b;
-        }
-        $crc = ($crc >> 8) ^ $subcrc;
-    }
-    $crc ^ 0xFFFFFFFF;
-}
-
-sub compute_headerCRC32 {
-    my ($info) = @_;
-    local $info->{headerCRC32} = 0;
-    crc32(pack($main_format, @$info{@$main_fields}));
-}
-
-sub read_header {
-    my ($sector, $F) = @_;
-    my $tmp;
-
-    c::lseek_sector(fileno($F), $sector, 0) or die "reading of partition in sector $sector failed";
-
-    sysread $F, $tmp, psizeof($main_format) or die "error while reading partition table in sector $sector";
-    my %info; @info{@$main_fields} = unpack $main_format, $tmp;
-    
-    $info{magic} eq $magic or die "bad magic number";
-    $info{myLBA} == $sector or die "myLBA is not the same";
-    $info{headerSize} == psizeof($main_format) or die "bad partition table header size";
-    $info{partitionEntrySize} == psizeof($partitionEntry_format) or die "bad partitionEntrySize";
-    $info{revision} <= $current_revision or log::l("oops, this is a new GPT revision ($info{revision} > $current_revision)");
-
-    $info{headerCRC32} == compute_headerCRC32(\%info) or die "bad partition table checksum";
-    \%info;
-}
-
-sub read_partitionEntries {
-    my ($info, $F) = @_;
-    my $tmp;
-
-    c::lseek_sector(fileno($F), $info->{partitionEntriesLBA}, 0) or die "can not seek to sector partitionEntriesLBA";
-    sysread $F, $tmp, psizeof($partitionEntry_format) * $info->{nbPartitions} or die "error while reading partition table in sector $info->{partitionEntriesLBA}";
-    $info->{partitionEntriesCRC32} == crc32($tmp) or die "bad partition entries checksum";
-
-    c::lseek_sector(fileno($F), $info->{partitionEntriesLBA}, 0) or die "can not seek to sector partitionEntriesLBA";
-    my %gpt_types_rev = reverse %gpt_types;
-    my @pt = 
-      map {
-	sysread $F, $tmp, psizeof($partitionEntry_format) or die "error while reading partition table in sector $info->{partitionEntriesLBA}";
-	my %h; @h{@$partitionEntry_fields} = unpack $partitionEntry_format, $tmp;
-	$h{size} = $h{ending} - $h{start} + 1;
-	my $pt_type = $gpt_types_rev{$h{gpt_type}};
-	fs::type::set_pt_type(\%h, defined $pt_type ? $pt_type : 0x100);
-	\%h;
-    } (1 .. $info->{nbPartitions});
-    \@pt;
-}
+#sub use_pt_type { 1 }
 
 sub read_one {
     my ($hd, $sector) = @_;
+    my $info;
+
+    c::get_disk_type($hd->{file}) eq "gpt" or die "not a GPT disk";
+    my @pt = map {
+        my %p;
+        print $_;
+        if (/^([^ ]*) ([^ ]*) ([^ ]*) (.*) \((\d*),(\d*),(\d*)\)$/) {
+            $p{part_number} = $1;
+            $p{real_device} = $2;
+            $p{fs_type} = $3;
+            $p{pt_type} = 0xba;
+            $p{start} = $5;
+            $p{size} = $7;
+        }
+        \%p;
+    } c::get_disk_partitions($hd->{file});
 
-    my $l = partition_table::dos::read($hd, $sector);
-    my @l = grep { $_->{size} && $_->{pt_type} && !partition_table::isExtended($_) } @$l;
-    @l == 1 or die "bad PMBR";
-    $l[0]{pt_type} == 0xee or die "bad PMBR";
-    my $myLBA = $l[0]{start};
-
-    my $F = partition_table::raw::openit($hd) or die "failed to open device";
-    my $info1 = eval { read_header($myLBA, $F) };
-    my $info2 = eval { read_header($info1->{alternateLBA} || $l[0]{start} + $l[0]{size} - 1, $F) }; #- what about using $hd->{totalsectors} ???
-    my $info = $info1 || { %$info2, myLBA => $info2->{alternateLBA}, alternateLBA => $info2->{myLBA}, partitionEntriesLBA => $info2->{alternateLBA} + 1 } or die;
-    my $pt = $info1 && $info2 ? 
-	eval { $info1 && read_partitionEntries($info1, $F) } || read_partitionEntries($info2, $F) :
-	read_partitionEntries($info, $F);
-    $hd->raw_removed($pt);
+    use Data::Dumper;
+    print Dumper(@pt);
 
-    $pt, $info;
+    [ @pt ], $info;
 }
 
-# write the partition table (and extended ones)
-# for each entry, it uses fields: start, size, pt_type, active
 sub write {
     my ($hd, $sector, $pt, $info) = @_;
 
-    foreach (@$pt) {
-	$_->{ending} = $_->{start} + $_->{size} - 1;
-	$_->{guid} ||= generate_guid();
-	$_->{gpt_type} = $gpt_types{$_->{pt_type}} || $_->{gpt_type} || $gpt_types{0x83};
+    # Initialize the disk if current partition table is not gpt
+    if (c::get_disk_type($hd->{file}) ne "gpt") {
+        c::set_disk_type($hd->{file}, "gpt");
     }
-    my $partitionEntries = join('', map {
-	pack($partitionEntry_format, @$_{@$partitionEntry_fields});	
-    } (@$pt, ({}) x ($info->{nbPartitions} - @$pt)));
 
-    $info->{partitionEntriesCRC32} = crc32($partitionEntries);
-    $info->{headerCRC32} = compute_headerCRC32($info);
-
-    my $info2 = { %$info, 
-		  myLBA => $info->{alternateLBA}, alternateLBA => $info->{myLBA}, 
-		  partitionEntriesLBA => $info->{alternateLBA} - psizeof($partitionEntry_format) * $info->{nbPartitions} / 512,
-		};
-    $info2->{headerCRC32} = compute_headerCRC32($info2);
-
-    {
-	# write the PMBR
-	my $pmbr = partition_table::dos::empty_raw();
-	$pmbr->{raw}[0] = { pt_type => 0xee, local_start => $info->{myLBA}, size => $info->{alternateLBA} - $info->{myLBA} + 1 };
-	partition_table::dos::write($hd, $sector, $pmbr->{raw});
+    foreach (@{$hd->{will_tell_kernel}}) {
+        my ($action, $part_number, $o_start, $o_size) = @$_;
+        my $part;
+        print "($action, $part_number, $o_start, $o_size)\n";
+        if ($action eq 'add') {
+            c::disk_add_partition($hd->{file}, $o_start, $o_size, $part->{fs_type}) or die "failed to add partition";
+        } elsif ($action eq 'del') {
+            c::disk_del_partition($hd->{file}, $part_number) or die "failed to del partition";
+        }
     }
-
-    my $F = partition_table::raw::openit($hd, 2) or die "error opening device $hd->{device} for writing";
-    
-    c::lseek_sector(fileno($F), $info->{myLBA}, 0) or return 0;
-    #- pad with 0's
-    syswrite $F, pack($main_format, @$info{@$main_fields}) . "\0" x 512, 512 or return 0;
-
-    c::lseek_sector(fileno($F), $info->{alternateLBA}, 0) or return 0;
-    #- pad with 0's
-    syswrite $F, pack($main_format, @$info2{@$main_fields}) . "\0" x 512, 512 or return 0;
-
-    c::lseek_sector(fileno($F), $info->{partitionEntriesLBA}, 0) or return 0;
-    syswrite $F, $partitionEntries or return 0;
-    
-    c::lseek_sector(fileno($F), $info2->{partitionEntriesLBA}, 0) or return 0;
-    syswrite $F, $partitionEntries or return 0;
-
     common::sync();
     1;
 }
 
-sub raw_removed {
-    my ($_hd, $raw) = @_;
-    @$raw = grep { $_->{size} && $_->{pt_type} } @$raw;
+sub initialize {
+    my ($class, $hd) = @_;
+    $hd->{primary} = { raw => [] };
+    bless $hd, $class;
 }
+
 sub can_add { &can_raw_add }
-sub can_raw_add {
-    my ($hd) = @_;
-    @{$hd->{primary}{raw}} < $hd->{primary}{info}{nbPartitions};
-}
+sub can_raw_add { 1 }
 sub raw_add {
     my ($hd, $raw, $part) = @_;
     $hd->can_raw_add or die "raw_add: partition table already full";
     push @$raw, $part;
 }
 
-sub use_pt_type { 1 }
-
 sub adjustStart {}
 sub adjustEnd {}
 
-sub first_usable_sector {
-    my ($hd) = @_;
-    $hd->{primary}{info}{firstUsableLBA};
-}
-sub last_usable_sector { 
-    my ($hd) = @_;
-    $hd->{primary}{info}{lastUsableLBA} + 1;
-}
-
-sub info {
-    my ($hd) = @_;
-    my $nb_sect = 32;
-
-    #- build a default suitable partition table,
-    #- checksum will be built when writing on disk.
-    {
-	magic => $magic,
-	revision => $current_revision,
-	headerSize => psizeof($main_format),
-	myLBA => 1,
-	alternateLBA => $hd->{totalsectors} - 1,
-	firstUsableLBA => $nb_sect + 2,
-	lastUsableLBA => $hd->{totalsectors} - $nb_sect - 2,
-	guid => generate_guid(),
-	partitionEntriesLBA => 2,
-	nbPartitions => $nb_sect * 512 / psizeof($partitionEntry_format),
-	partitionEntrySize => psizeof($partitionEntry_format),
-    };
-}
-
-sub initialize {
-    my ($class, $hd) = @_;
-    $hd->{primary} = { raw => [], info => info($hd) };
-    bless $hd, $class;
-}
-
 1;