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Diffstat (limited to 'perl-install/partition_table/gpt.pm')
| -rw-r--r-- | perl-install/partition_table/gpt.pm | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/perl-install/partition_table/gpt.pm b/perl-install/partition_table/gpt.pm new file mode 100644 index 000000000..af5509f27 --- /dev/null +++ b/perl-install/partition_table/gpt.pm @@ -0,0 +1,161 @@ +package partition_table::gpt; + +use diagnostics; +use strict; +use vars qw(@ISA); + +@ISA = qw(partition_table::raw); + +use fs::type; +use partition_table::raw; +use c; + +=head1 SYNOPSYS + +Read/write GUID partition tables (GPT) + +See https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs for a list of exitings GUIDs + +=head1 Functions + +=over + +=cut +my $nb_primary = 128; + + +sub first_usable_sector { 34 } + +sub last_usable_sector { + my ($hd) = @_; + #- do not use totalsectors because backup GPT is at end + $hd->{totalsectors} - 33; +} + +my %parted_mapping = ( + 'linux-swap(v1)' => 'swap', + 'ntfs' => 'ntfs-3g', + 'fat16' => 'vfat', + 'fat32' => 'vfat', + ); +my %rev_parted_mapping = reverse %parted_mapping; +# prefer 'fat32' over 'fat16': +$rev_parted_mapping{vfat} = 'fat32'; + +sub read_one { + my ($hd, $_sector) = @_; + + $hd->{current_pt_table_type} eq "gpt" or die "$hd->{device} not a GPT disk ($hd->{file})"; + + my @pt; + foreach (c::get_disk_partitions($hd->{file})) { + # compatibility with MBR partitions tables: + $_->{pt_type} = 0x82 if $_->{fs_type} eq 'swap'; + $_->{pt_type} = 0x0b if $_->{fs_type} eq 'vfat'; + $_->{pt_type} = 0x83 if $_->{fs_type} =~ /^ext/; + + # fix detecting ESP (special case are they're detected through pt_type): + if ($_->{flag} eq 'ESP') { + $_->{pt_type} = 0xef; + } elsif ($_->{flag} eq 'BIOS_GRUB') { + $_->{fs_type} = $_->{flag}; # hack to prevent it to land in hd->{raw} + $_->{pt_type} = $_->{flag}; # hack... + } elsif ($_->{flag} eq 'LVM') { + $_->{pt_type} = 0x8e; + } elsif ($_->{flag} eq 'RAID') { + $_->{pt_type} = 0xfd; + } elsif ($_->{flag} eq 'RECOVERY') { + $_->{pt_type} = 0x12; + } + $_->{fs_type} = $parted_mapping{$_->{fs_type}} if $parted_mapping{$_->{fs_type}}; + + @pt[$_->{part_number}-1] = $_; + } + + for (my $part_number = 1; $part_number < $nb_primary; $part_number++) { + next if exists($pt[$part_number-1]); + $pt[$part_number-1] = { part_number => $part_number }; + } + + \@pt; +} + +sub write { + my ($hd, $_handle, $_sector, $pt, $_info) = @_; + + my $ped_disk; + my $partitions_killed; + + # Initialize the disk if current partition table is not gpt + if ($hd->{current_pt_table_type} ne "gpt") { + $ped_disk = c::disk_open($hd->{file}, "gpt") or die "failed to create new partition table on $hd->{file}"; + $partitions_killed = 1; + } else { + $ped_disk = c::disk_open($hd->{file}) or die "failed to open partition table on $hd->{file}"; + } + + foreach (@{$hd->{will_tell_kernel}}) { + my ($action, $part_number, $o_start, $o_size) = @$_; + my ($part) = grep { $_->{start} == $o_start && $_->{size} == $o_size } @$pt; + log::l("GPT partitioning: ($action, $part_number, $o_start, $o_size)"); + if ($action eq 'add') { + local $part->{fs_type} = $rev_parted_mapping{$part->{fs_type}} if $rev_parted_mapping{$part->{fs_type}}; + c::disk_add_partition($ped_disk, $o_start, $o_size, $part->{fs_type}) or die "failed to add partition #$part_number on $hd->{file}"; + my $flag; + if (isESP($part)) { + $flag = 'ESP'; + } elsif (isBIOS_GRUB($part)) { + $flag = 'BIOS_GRUB'; + } elsif (isRawLVM($part)) { + $flag = 'LVM'; + } elsif (isRawRAID($part)) { + $flag = 'RAID'; + } + if ($flag) { + c::set_partition_flag($ped_disk, $part_number, $flag) + or die "failed to set type '$flag' for $part->{file} on $part->{mntpoint}"; + } + } elsif ($action eq 'del' && !$partitions_killed) { + c::disk_del_partition($ped_disk, $part_number) or die "failed to del partition #$part_number on $hd->{file}"; + } elsif ($action eq 'init' && !$partitions_killed) { + c::disk_delete_all($ped_disk) or die "failed to delete all partitions on $hd->{file}"; + } + } + + # Commit changes to the disk and inform the kernel + my $commit_level = c::disk_commit($ped_disk); + # Updating the kernel partition table will fail if any of the deleted partitions were mounted + $hd->{rebootNeeded} = 1 if $commit_level < 2; + $commit_level; +} + +=item need_to_tell_kernel($hd) + +Hint partition_table::write() that telling the kernel to reread the +partition_table is not needed if we already succeeded in that + +=cut + +sub need_to_tell_kernel { + my ($hd) = @_; + # If we failed, try again (partion_table::tell_kernel() will unmount some partitions first) + $hd->{rebootNeeded}; +} + +sub initialize { + my ($class, $hd) = @_; + # part_number starts at 1 + my @raw = map { +{ part_number => $_ + 1 } } 0..$nb_primary-2; + $hd->{primary} = { raw => \@raw }; + bless $hd, $class; +} + +sub can_add { &can_raw_add } +sub adjustStart {} +sub adjustEnd {} + +=back + +=cut + +1; |