From 61b0cd36577df2a9f86cb2c08d14737f0bbcb557 Mon Sep 17 00:00:00 2001 From: Thierry Vignaud Date: Tue, 23 Jul 2002 11:08:35 +0000 Subject: g Move 2: partition table: hierarchy --- perl-install/partition_table/raw.pm | 192 ++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) create mode 100644 perl-install/partition_table/raw.pm (limited to 'perl-install/partition_table/raw.pm') diff --git a/perl-install/partition_table/raw.pm b/perl-install/partition_table/raw.pm new file mode 100644 index 000000000..3be68fe56 --- /dev/null +++ b/perl-install/partition_table/raw.pm @@ -0,0 +1,192 @@ +package partition_table::raw; # $Id$ + +use diagnostics; +use strict; + +use common; +use devices; +use detect_devices; +use log; +use c; + +my @MBR_signatures = ( +if_(arch() =~ /ppc/, + map { [ 'yaboot', 0, "PM", 0x200 * $_ + 0x10, "bootstrap\0" ] } 0 .. 61 +), + [ 'empty', 0, "\0\0\0\0" ], + [ 'grub', 0, "\xEBG", 0x17d, "stage1 \0" ], + [ 'grub', 0, "\xEBH", 0x17e, "stage1 \0" ], + [ 'grub', 0, "\xEBH", 0x18a, "stage1 \0" ], + [ 'grub', 0, "\xEBH", 0x181, "GRUB \0" ], + [ 'lilo', 0x2, "LILO" ], + [ 'lilo', 0x6, "LILO" ], + [ 'grub', 0x6, "GRUB" ], + [ 'osbs', 0x2, "OSBS" ], #- http://www.prz.tu-berlin.de/~wolf/os-bs.html + [ 'pqmagic', 0xef, "PQV" ], + [ 'BootStar', 0x130, "BootStar:" ], + [ 'DocsBoot', 0x148, 'DocsBoot' ], + [ 'system_commander', 0x1ad, "SYSCMNDRSYS" ], + [ 'Be Os', 0x24, 'Boot Manager' ], + [ 'TimO', 0, 'IBM Thinkpad hibernation partition' ], + [ 'dos', 0xa0, "\x25\x03\x4E\x02\xCD\x13" ], + [ 'dos', 0xa0, "\x00\xB4\x08\xCD\x13\x72" ], #- nt2k's + [ 'dos', 0x60, "\xBB\x00\x7C\xB8\x01\x02\x57\xCD\x13\x5F\x73\x0C\x33\xC0\xCD\x13" ], #- nt's + [ 'dos', 0x70, "\x0C\x33\xC0\xCD\x13\x4F\x75\xED\xBE\xA3" ], + [ 'freebsd', 0xC0, "\x00\x30\xE4\xCD\x16\xCD\x19\xBB\x07\x00\xB4" ], + [ 'freebsd', 0x160, "\x6A\x10\x89\xE6\x48\x80\xCC\x40\xCD\x13" ], + [ 'dummy', 0xAC, "\x0E\xB3\x07\x56\xCD\x10\x5E\xEB" ], #- caldera? + [ 'ranish', 0x100, "\x6A\x10\xB4\x42\x8B\xF4\xCD\x13\x8B\xE5\x73" ], + [ 'os2', 0x1c2, "\xA" ], +); + +sub typeOfMBR($) { typeFromMagic(devices::make($_[0]), @MBR_signatures) } +sub typeOfMBR_($) { typeFromMagic($_[0], @MBR_signatures) } + +sub hasExtended { 0 } + +sub cylinder_size($) { + my ($hd) = @_; + $hd->{geom}{sectors} * $hd->{geom}{heads}; +} +sub first_usable_sector { 1 } +sub last_usable_sector { + my ($hd) = @_; + $hd->{totalsectors}; +} + +#- default method for starting a partition, only head size or twice +#- is allowed for starting a partition after a cylinder boundarie. +sub adjustStart($$) { + my ($hd, $part) = @_; + my $end = $part->{start} + $part->{size}; + + $part->{start} = round_up($part->{start}, + $part->{start} % cylinder_size($hd) < 2 * $hd->{geom}{sectors} ? + $hd->{geom}{sectors} : cylinder_size($hd)); + $part->{size} = $end - $part->{start}; + $part->{size} > 0 or die "adjustStart get a too small partition to handle correctly"; +} +#- adjusting end to match a cylinder boundary, two methods are used and must +#- match at the end, else something is wrong and nothing will be done on +#- partition table. +#- $end2 is computed by removing 2 (or only 1 if only 2 heads on drive) groups +#- of sectors, this is necessary to handle extended partition where logical +#- partition start after 1 (or 2 accepted) groups of sectors (typically 63). +#- $end is floating (is not on cylinder boudary) so we have to choice a good +#- candidate, $end1 or $end2 should always be good except $end1 for small +#- partition size. +sub adjustEnd($$) { + my ($hd, $part) = @_; + my $end = $part->{start} + $part->{size}; + $end > $hd->{geom}{cylinders} * cylinder_size($hd) && $end <= $hd->{totalsectors} and return; + my $end1 = round_down($end, cylinder_size($hd)); + my $end2 = round_up($end - ($hd->{geom}{heads} > 2 ? 2 : 1) * $hd->{geom}{sectors}, cylinder_size($hd)); + $end2 <= $hd->{geom}{cylinders} * cylinder_size($hd) or die "adjustEnd go beyond end of device geometry ($end2 > $hd->{totalsectors})"; + $part->{size} = ($end1 - $part->{start} > cylinder_size($hd) ? $end1 : $end2) - $part->{start}; + $part->{size} > 0 or die "adjustEnd get a too small partition to handle correctly"; +} + +sub get_geometry($) { + my ($dev) = @_; + my $g = ""; + + local *F; sysopen F, $dev, 0 or return; + ioctl(F, c::HDIO_GETGEO(), $g) or return; + my %geom; @geom{qw(heads sectors cylinders start)} = unpack "CCSL", $g; + $geom{totalcylinders} = $geom{cylinders}; + + my $total; + #- $geom{cylinders} is no good (only a ushort, that means less than 2^16 => at best 512MB) + if ($total = c::total_sectors(fileno F)) { + $geom{cylinders} = int $total / $geom{heads} / $geom{sectors}; + } else { + $total = $geom{heads} * $geom{sectors} * $geom{cylinders} + } + + { geom => \%geom, totalsectors => $total }; +} + +sub openit($$;$) { sysopen $_[1], $_[0]{file}, $_[2] || 0; } + +# cause kernel to re-read partition table +sub kernel_read($) { + my ($hd) = @_; + common::sync(); + local *F; openit($hd, *F) or return 0; + common::sync(); sleep(1); + $hd->{rebootNeeded} = !ioctl(F, c::BLKRRPART(), 0); + common::sync(); + close F; + common::sync(); sleep(1); +} + +sub raw_removed { + my ($hd, $raw) = @_; +} +sub can_raw_add { + my ($hd) = @_; + $_->{size} || $_->{type} or return 1 foreach @{$hd->{primary}{raw}}; + 0; +} +sub raw_add { + my ($hd, $raw, $part) = @_; + + foreach (@$raw) { + $_->{size} || $_->{type} and next; + $_ = $part; + return; + } + die "raw_add: partition table already full"; +} + +sub zero_MBR { + my ($hd) = @_; + #- force the standard partition type for the architecture + my $type = arch() =~ /ia64/ ? 'gpt' : arch() eq "alpha" ? "bsd" : arch() =~ /^sparc/ ? "sun" : arch() eq "ppc" ? "mac" : "dos"; + #- override standard mac type on PPC for IBM machines to dos + $type = "dos" if (arch() =~ /ppc/ && detect_devices::get_mac_model() =~ /^IBM/); + require("partition_table/$type.pm"); + bless $hd, "partition_table::$type"; + $hd->{primary} = $hd->clear_raw(); + delete $hd->{extended}; +} + +sub zero_MBR_and_dirty { + my ($hd) = @_; + zero_MBR($hd); + $hd->{isDirty} = $hd->{needKernelReread} = 1; + +} + +#- ugly stuff needed mainly for Western Digital IDE drives +#- try writing what we've just read, yells if it fails +#- testing on last sector of head #0 (unused in 99% cases) +#- +#- return false if the device can't be written to (especially for Smartmedia) +sub test_for_bad_drives { + my ($hd) = @_; + + log::l("test_for_bad_drives($hd->{file})"); + my $sector = $hd->{geom}{sectors} - 1; + + + local *F; openit($hd, *F, 2) or die "can't open device"; + + my $seek = sub { + c::lseek_sector(fileno(F), $sector, 0) or die "seeking to sector $sector failed"; + }; + my $tmp; + + &$seek; sysread F, $tmp, $SECTORSIZE or die "test_for_bad_drives: can't even read ($!)"; + &$seek; syswrite F, $tmp or die "test_for_bad_drives: can't even write ($!)"; + + my $tmp2; + &$seek; sysread F, $tmp2, $SECTORSIZE or die "test_for_bad_drives: can't even read again ($!)"; + $tmp eq $tmp2 or die +_("Something bad is happening on your drive. +A test to check the integrity of data has failed. +It means writing anything on the disk will end up with random trash"); + 1; +} + +1; -- cgit v1.2.1