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package fsedit;
use diagnostics;
use strict;
use common qw(:common);
use partition_table qw(:types);
use partition_table_raw;
use devices;
use log;
1;
my @suggestions = (
{ mntpoint => "/boot", minsize => 10 << 11, size => 16 << 11, type => 0x83 },
{ mntpoint => "/", minsize => 50 << 11, size => 100 << 11, type => 0x83 },
{ mntpoint => "swap", minsize => 30 << 11, size => 60 << 11, type => 0x82 },
{ mntpoint => "/usr", minsize => 200 << 11, size => 500 << 11, type => 0x83 },
{ mntpoint => "/home", minsize => 50 << 11, size => 200 << 11, type => 0x83 },
{ mntpoint => "/var", minsize => 200 << 11, size => 250 << 11, type => 0x83 },
{ mntpoint => "/tmp", minsize => 50 << 11, size => 100 << 11, type => 0x83 },
{ mntpoint => "/mnt/iso", minsize => 700 << 11, size => 800 << 11, type => 0x83 },
);
1;
sub suggestions_mntpoint($) {
my ($hds) = @_;
grep { !/swap/ && !has_mntpoint($_, $hds) } map { $_->{mntpoint} } @suggestions;
}
sub hds($$) {
my ($drives, $flags) = @_;
my @hds;
my $rc;
foreach (@$drives) {
my $file = devices::make($_->{device});
my $hd = partition_table_raw::get_geometry($file) or die _("An error occurred while getting the geometry of block device %s: %s", $file, "$!");
$hd = { (%$_, %$hd) };
$hd->{file} = $file;
$hd->{prefix} = $hd->{device};
# for RAID arrays of format c0d0p1
$hd->{prefix} .= "p" if $hd->{prefix} =~ m,(rd|ida)/,;
eval { $rc = partition_table::read($hd, $flags->{clearall}) };
if ($@) {
$@ =~ /bad magic number/ or die;
partition_table_raw::zero_MBR($hd) if $flags->{eraseBadPartitions};
}
$rc ? push @hds, $hd : log::l("An error occurred reading the partition table for the block device $_->{device}");
}
[ @hds ];
}
sub get_fstab(@) {
map { partition_table::get_normal_parts($_) } @_;
}
sub suggest_part($$$;$) {
my ($hd, $part, $hds, $suggestions) = @_;
$suggestions ||= \@suggestions;
foreach (@$suggestions) { $_->{minsize} ||= $_->{size} }
my $has_swap = grep { isSwap($_) } get_fstab(@$hds);
my ($best, $second) =
grep { $part->{size} >= $_->{minsize} }
grep { ! has_mntpoint($_->{mntpoint}, $hds) || isSwap($_) && !$has_swap }
@$suggestions or return;
$best = $second if
$best->{mntpoint} eq '/boot' &&
$part->{start} + $best->{minsize} > 1024 * partition_table::cylinder_size($hd); # if the empty slot is beyond the 1024th cylinder, no use having /boot
defined $best or return; # sorry no suggestion :(
$part->{mntpoint} = $best->{mntpoint};
$part->{type} = $best->{type};
$part->{size} = min($part->{size}, $best->{size});
1;
}
#sub partitionDrives {
#
# my $cmd = "/sbin/fdisk";
# -x $cmd or $cmd = "/usr/bin/fdisk";
#
# my $drives = findDrivesPresent() or die "You don't have any hard drives available! You probably forgot to configure a SCSI controller.";
#
# foreach (@$drives) {
# my $text = "/dev/" . $_->{device};
# $text .= " - SCSI ID " . $_->{id} if $_->{device} =~ /^sd/;
# $text .= " - Model " . $_->{info};
# $text .= " array" if $_->{device} =~ /^c.d/;
#
# # truncate at 50 columns for now
# $text = substr $text, 0, 50;
# }
# #TODO TODO
#}
sub has_mntpoint($$) {
my ($mntpoint, $hds) = @_;
scalar grep { $mntpoint eq $_->{mntpoint} } get_fstab(@$hds);
}
# do this before modifying $part->{mntpoint}
# $part->{mntpoint} should not be used here, use $mntpoint instead
sub check_mntpoint {
my ($mntpoint, $hd, $part, $hds) = @_;
$mntpoint eq '' and return;
local $_ = $mntpoint;
m|^/| or die _("Mount points must begin with a leading /");
# m|(.)/$| and die "The mount point $_ is illegal.\nMount points may not end with a /";
has_mntpoint($mntpoint, $hds) and die _("There is already a partition with mount point %s", $mntpoint);
if ($part->{start} + $part->{size} > 124 * partition_table::cylinder_size($hd)) {
die "/boot ending on cylinder > 1024" if $mntpoint eq "/boot";
die "/ ending on cylinder > 1024" if $mntpoint eq "/" && !has_mntpoint("/boot", $hds);
}
}
sub add($$$;$) {
my ($hd, $part, $hds, $force) = @_;
isSwap($part) ?
($part->{mntpoint} = 'swap') :
$force || check_mntpoint($part->{mntpoint}, $hd, $part, $hds);
partition_table::add($hd, $part);
}
sub removeFromList($$$) {
my ($start, $end, $list) = @_;
my $err = "error in removeFromList: removing an non-free block";
for (my $i = 0; $i < @$list; $i += 2) {
$start < $list->[$i] and die $err;
$start > $list->[$i + 1] and next;
if ($start == $list->[$i]) {
$end > $list->[$i + 1] and die $err;
if ($end == $list->[$i + 1]) {
# the free block is just the same size, removing it
splice(@$list, 0, 2);
} else {
# the free block now start just after this block
$list->[$i] = $end;
}
} else {
$end <= $list->[$i + 1] or die $err;
if ($end < $list->[$i + 1]) {
splice(@$list, $i + 2, 0, $end, $list->[$i + 1]);
}
$list->[$i + 1] = $start; # shorten the free block
}
return;
}
}
sub allocatePartitions($$) {
my ($hds, $to_add) = @_;
my %free_sectors = map { $_->{device} => [1, $_->{totalsectors} ] } @$hds; # first sector is always occupied by the MBR
my $remove = sub { removeFromList($_[0]->{start}, $_[0]->{start} + $_[0]->{size}, $free_sectors{$_[0]->{rootDevice}}) };
my $success = 0;
foreach (get_fstab(@$hds)) { &$remove($_); }
FSTAB: foreach (@$to_add) {
my %e = %$_;
foreach my $hd (@$hds) {
my $v = $free_sectors{$hd->{device}};
for (my $i = 0; $i < @$v; $i += 2) {
my $size = $v->[$i + 1] - $v->[$i];
$e{size} > $size and next;
$e{start} = $v->[$i];
$e{rootDevice} = $hd->{device};
partition_table::adjustStartAndEnd($hd, \%e);
&$remove(\%e);
partition_table::add($hd, \%e);
$success++;
next FSTAB;
}
}
log::ld("can't allocate partition $e{mntpoint} of size $e{size}, not enough room");
}
$success;
}
sub auto_allocate($;$) {
my ($hds, $suggestions) = @_;
allocatePartitions($hds, [
grep { ! has_mntpoint($_->{mntpoint}, $hds) }
@{ $suggestions || \@suggestions }
]);
map { partition_table::assign_device_numbers($_) } @$hds;
}
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