diff options
Diffstat (limited to 'perl-install/partition_table_sun.pm')
| -rw-r--r-- | perl-install/partition_table_sun.pm | 169 |
1 files changed, 121 insertions, 48 deletions
diff --git a/perl-install/partition_table_sun.pm b/perl-install/partition_table_sun.pm index 5c8fc749f..2eec591b3 100644 --- a/perl-install/partition_table_sun.pm +++ b/perl-install/partition_table_sun.pm @@ -1,4 +1,4 @@ -package partition_table_sun; +package partition_table_sun; # $Id$ use diagnostics; use strict; @@ -11,12 +11,6 @@ use partition_table_raw; use partition_table; use c; -#- very bad and rough handling :( -my %typeToDos = ( - 5 => 0, -); -my %typeFromDos = reverse %typeToDos; - my ($main_format, $main_fields) = list2kv( a128 => 'info', a14 => 'spare0', @@ -39,12 +33,44 @@ my ($main_format, $main_fields) = list2kv( $main_format = join '', @$main_format; my ($fields1, $fields2) = ([ qw(type flags) ], [ qw(start_cylinder size) ]); -my ($format1, $format2) = ("x C x C", "N N"); +my ($format1, $format2) = ("xCxC", "N2"); my ($size1, $size2) = map { psizeof($_) } ($format1, $format2); my $magic = 0xDABE; my $nb_primary = 8; my $offset = 0; +sub adjustStart($$) { + my ($hd, $part) = @_; + my $end = $part->{start} + $part->{size}; + + #- since partition must always start on cylinders boundaries on sparc, + #- note that if start sector is on the first cylinder, it is adjusted + #- to 0 and it is valid, cylinder 0 bug is from bad define for sparc + #- compilation of mke2fs combined with a blind kernel... + $part->{start} = round_down($part->{start}, $hd->cylinder_size()); + $part->{size} = $end - $part->{start}; + $part->{size} = $hd->cylinder_size() if $part->{size} <= 0; +} +sub adjustEnd($$) { + my ($hd, $part) = @_; + my $end = $part->{start} + $part->{size}; + my $end2 = round_up($end, $hd->cylinder_size()); + $end2 = $hd->{geom}{cylinders} * $hd->cylinder_size() if $end2 > $hd->{geom}{cylinders} * $hd->cylinder_size(); + $part->{size} = $end2 - $part->{start}; +} + +#- compute crc checksum used for Sun Label partition, expect +#- $tmp to be the 512 bytes buffer to be read/written to MBR. +sub compute_crc($) { + my ($tmp) = @_; + my @l2b = unpack "n256", $tmp; + my $crc = 0; + + map { $crc ^= $_ } @l2b; + + $crc; +} + sub read($$) { my ($hd, $sector) = @_; my $tmp; @@ -58,18 +84,31 @@ sub read($$) { #- check magic number $info{magic} == $magic or die "bad magic number"; - @{$hd->{geom}}{qw(cylinders heads sectors)} = @info{qw(ncyl nsect ntrks)}; - - #- TODO verify checksum - my @pt = mapn { - my %h; - @h{@$fields1} = unpack $format1, $_[0]; - @h{@$fields2} = unpack $format2, $_[1]; - $h{start} = $sector + $h{start_cylinder} * partition_table::cylinder_size($hd); - $h{type} = $typeToDos{$h{type}} || $h{type}; - $h{size} or $h{$_} = 0 foreach keys %h; - \%h; - } [ $info{infos} =~ /(.{$size1})/g ], [ $info{partitions} =~ /(.{$size2})/g ]; + #- check crc, csum contains the crc so result should be 0. + compute_crc($tmp) == 0 or die "bad checksum"; + + @{$hd->{geom}}{qw(cylinders heads sectors)} = @info{qw(ncyl ntrks nsect)}; + + my @pt; + my @infos_up = unpack $format1 x $nb_primary, $info{infos}; + my @partitions_up = unpack $format2 x $nb_primary, $info{partitions}; + for (0..$nb_primary-1) { + my $h = { type => $infos_up[2 * $_], flag => $infos_up[1 + 2 * $_], + start_cylinder => $partitions_up[2 * $_], size => $partitions_up[1 + 2 * $_] }; + $h->{start} = $sector + $h->{start_cylinder} * $hd->cylinder_size(); + $h->{type} && $h->{size} or $h->{$_} = 0 foreach keys %$h; + push @pt, $h; + } + +#- this code is completely broken by null char inside strings, it gets completely crazy :-) +# my @pt = mapn { +# my %h; +# @h{@$fields1} = unpack $format1, $_[0]; +# @h{@$fields2} = unpack $format2, $_[1]; +# $h{start} = $sector + $h{start_cylinder} * $hd->cylinder_size(); +# $h{type} && $h{size} or $h{$_} = 0 foreach keys %h; +# \%h; +# } [ grep { $_ } split /(.{$size1})/o, $info{infos} ], [ grep { $_ } split /(.{$size2})/o, $info{partitions} ]; [ @pt ], \%info; } @@ -78,51 +117,85 @@ sub read($$) { # for each entry, it uses fields: start, size, type, active sub write($$$;$) { my ($hd, $sector, $pt, $info) = @_; - - local *F; partition_table_raw::openit($hd, *F, 2) or die "error opening device $hd->{device} for writing"; - c::lseek_sector(fileno(F), $sector, $offset) or return 0; - - #- TODO compute checksum +# my ($csize, $wdsize) = (0, 0); + + #- handle testing for writing partition table on file only! + local *F; + if ($::testing) { + my $file = "/tmp/partition_table_$hd->{device}"; + open F, ">$file" or die "error opening test file $file"; + } else { + partition_table_raw::openit($hd, *F, 2) or die "error opening device $hd->{device} for writing"; + c::lseek_sector(fileno(F), $sector, $offset) or return 0; + } ($info->{infos}, $info->{partitions}) = map { join '', @$_ } list2kv map { - $_->{start} % partition_table::cylinder_size($hd) == 0 or die "partition not at beginning of cylinder"; - local $_->{type} = $typeFromDos{$_->{type}} || $_->{type}; - local $_->{start_cylinder} = $_->{start} / partition_table::cylinder_size($hd) - $sector; + $_->{start} % $hd->cylinder_size() == 0 or die "partition not at beginning of cylinder"; +# $csize += $_->{size} if $_->{type} != 5; +# $wdsize += $_->{size} if $_->{type} == 5; + $_->{flags} |= 0x10 if $_->{mntpoint} eq '/'; + $_->{flags} |= 0x01 if partition_table::isSwap($_); + local $_->{start_cylinder} = $_->{start} / $hd->cylinder_size() - $sector; pack($format1, @$_{@$fields1}), pack($format2, @$_{@$fields2}); } @$pt; +# $csize == $wdsize or die "partitions are not using whole disk space"; + + #- compute the checksum by building the buffer to write and call compute_crc. + #- set csum to 0 so compute_crc will give the right csum value. + $info->{csum} = 0; + $info->{csum} = compute_crc(pack($main_format, @$info{@$main_fields})); syswrite F, pack($main_format, @$info{@$main_fields}), psizeof($main_format) or return 0; + sync(); + 1; } sub info { my ($hd) = @_; - my $dtype_scsi = 4; #- taken from fdisk, removed unused one, - my $dtype_ST506 = 6; #- see fdisk for more - - { - magic => $magic, - magic2 => $magic, - dtype => $hd->{device} =~ /^sd/ ? $dtype_scsi : $dtype_ST506, - secsize => $common::SECTORSIZE, - ncylinders => $hd->{geom}{cylinders}, - secpercyl => partition_table::cylinder_size($hd), - secprtunit => $hd->{geom}{totalsectors}, - rpm => 3600, - interleave => 1, - trackskew => 0, - cylskew => 0, - headswitch => 0, - trkseek => 0, - bbsize => 8192, #- size of boot area, with label - sbsize => 8192, #- max size of fs superblock + + #- take care of reduction of the number of cylinders, avoid loop of reduction! + unless ($hd->{geom}{totalcylinders} > $hd->{geom}{cylinders}) { + $hd->{geom}{totalcylinders} = $hd->{geom}{cylinders}; + $hd->{geom}{cylinders} -= 2; + + #- rebuild some constants according to number of cylinders. + $hd->{totalsectors} = $hd->{geom}{heads} * $hd->{geom}{sectors} * $hd->{geom}{cylinders}; + } + + #- build a default suitable partition table, + #- checksum will be built when writing on disk. + #- note third partition is ALWAYS of type Whole disk. + my $info = { + info => "DiskDrake partition table", + rspeed => 5400, + pcylcount => $hd->{geom}{totalcylinders}, + sparecyl => 0, + ilfact => 1, + ncyl => $hd->{geom}{cylinders}, + nacyl => $hd->{geom}{totalcylinders} - $hd->{geom}{cylinders}, + ntrks => $hd->{geom}{heads}, + nsect => $hd->{geom}{sectors}, + magic => $magic, }; + + $info; } sub clear_raw { my ($hd) = @_; - { raw => [ ({}) x $nb_primary ], info => info($hd) }; + my $pt = { raw => [ ({}) x $nb_primary ], info => info($hd) }; + + #- handle special case for partition 2 which is whole disk. + $pt->{raw}[2] = { + type => 5, #- the whole disk type. + flags => 0, + start_cylinder => 0, + size => $hd->{geom}{cylinders} * $hd->cylinder_size(), + }; + + $pt; } 1; |