summaryrefslogtreecommitdiffstats
path: root/perl-install/fsedit.pm
blob: fe5fcc0ab27142a7eda76fd31b91e232580566c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
package fsedit; # $Id$

use diagnostics;
use strict;
use vars qw(%suggestions);

#-######################################################################################
#- misc imports
#-######################################################################################
use common qw(:common :constant :functional :file);
use partition_table qw(:types);
use partition_table_raw;
use detect_devices;
use fsedit;
use devices;
use loopback;
use log;
use fs;

%suggestions = (
  __("simple") => [
    { mntpoint => "/",     size => 300 << 11, type => 0x83, ratio => 5, maxsize =>3500 << 11 },
    { mntpoint => "swap",  size =>  64 << 11, type => 0x82, ratio => 1, maxsize => 250 << 11 },
    { mntpoint => "/home", size => 300 << 11, type => 0x83, ratio => 3 },
  ], 'with usr' => [
    { mntpoint => "/",     size => 150 << 11, type => 0x83, ratio => 1, maxsize => 500 << 11 },
    { mntpoint => "swap",  size =>  64 << 11, type => 0x82, ratio => 1, maxsize => 250 << 11 },
    { mntpoint => "/usr",  size => 300 << 11, type => 0x83, ratio => 4, maxsize =>3000 << 11 },
    { mntpoint => "/home", size => 100 << 11, type => 0x83, ratio => 5 },
  ], __("server") => [
    { mntpoint => "/",     size => 150 << 11, type => 0x83, ratio => 1, maxsize => 250 << 11 },
    { mntpoint => "swap",  size =>  64 << 11, type => 0x82, ratio => 2, maxsize => 400 << 11 },
    { mntpoint => "/usr",  size => 300 << 11, type => 0x83, ratio => 3, maxsize =>3000 << 11 },
    { mntpoint => "/var",  size => 100 << 11, type => 0x83, ratio => 4 },
    { mntpoint => "/home", size => 100 << 11, type => 0x83, ratio => 5 },
  ],
);
my @suggestions_mntpoints = (
    "/root", "/var/ftp", "/var/www", "/boot",
    arch() =~ /sparc/ ? "/mnt/sunos" : "/mnt/windows",
);

my @partitions_signatures = (
    [ 0x83, 0x438, "\x53\xEF" ],
    [ 0x183, 0x10034, "ReIsErFs" ],
    [ 0x183, 0x10034, "ReIsEr2Fs" ],
    [ 0x82, 4086, "SWAP-SPACE" ],
    [ 0x7,  0x1FE, "\x55\xAA", 0x3, "NTFS" ],
    [ 0xc,  0x1FE, "\x55\xAA", 0x52, "FAT32" ],
arch() !~ /^sparc/ ? (
    [ 0x6,  0x1FE, "\x55\xAA", 0x36, "FAT" ],
) : (),
);

sub typeOfPart { typeFromMagic(devices::make($_[0]), @partitions_signatures) }

#-######################################################################################
#- Functions
#-######################################################################################
sub hds {
    my ($drives, $flags) = @_;
    my (@hds, @lvms);
    my $rc;

    foreach (@$drives) {
	my $file = devices::make($_->{device});

	my $hd = partition_table_raw::get_geometry($file) or log::l("An error occurred while getting the geometry of block device $file: $!"), next;
	add2hash_($hd, $_);
	$hd->{file} = $file;
	$hd->{prefix} = $hd->{device};
	# for RAID arrays of format c0d0p1
	$hd->{prefix} .= "p" if $hd->{prefix} =~ m,(rd|ida|cciss)/,;

	eval { partition_table::read($hd, $flags->{clearall} || member($_->{device}, @{$flags->{clear} || []})) };
	if ($@) {
	    partition_table_raw::zero_MBR($hd);
	}
	member($_->{device}, @{$flags->{clear} || []}) and partition_table::remove($hd, $_)
	  foreach partition_table::get_normal_parts($hd);

	#- special case for type overloading (eg: reiserfs is 0x183)
	foreach (grep { isExt2($_) } partition_table::get_normal_parts($hd)) {
	    my $type = typeOfPart($_->{device});
	    $_->{type} = $type if $type > 0x100;
	}
	push @hds, $hd;
    }
    if (my @pvs = grep { isLVM($_) } map { partition_table::get_normal_parts($_) } @hds) {
	#- otherwise vgscan won't find them
	devices::make($_->{device}) foreach @pvs; 
	require lvm;
	foreach (@pvs) {
	    my $name = lvm::get_vg($_) or next;
	    my ($lvm) = grep { $_->{LVMname} eq $name } @hds;
	    if (!$lvm) {
		$lvm = bless { disks => [], LVMname => $name, level => 'linear' }, 'lvm';
		lvm::update_size($lvm);
		lvm::get_lvs($lvm);
		push @lvms, $lvm;
	    }
	    $_->{lvm} = $name;
	    push @{$lvm->{disks}}, $_;
	}
    }
    \@hds, \@lvms;
}

sub readProcPartitions {
    my ($hds) = @_;
    my @parts;
    foreach (cat_("/proc/partitions")) {
	my (undef, undef, $size, $device) = split;
	next if $size eq "1"; #- extended partitions
	foreach (@$hds) {
	    push @parts, { start => 0, size => $size * 2, device => $device, 
			   type => typeOfPart($device), rootDevice => $_->{device} 
			 } if $device =~ /^$_->{device}./;
	}
    }
    @parts;
}

#- get all normal partition including special ones as found on sparc.
sub get_fstab {
    loopback::loopbacks(@_), map { partition_table::get_normal_parts($_) } @_
}

#- get normal partition that should be visible for working on.
sub get_visible_fstab {
    grep { $_ && !partition_table::isWholedisk($_) && !partition_table::isHiddenMacPart($_) } map { partition_table::get_normal_parts($_) } @_;
}

sub free_space {
    sum map { $_->{size} } map { partition_table::get_holes($_) } @_;
}

sub is_one_big_fat {
    my ($hds) = @_;
    @$hds == 1 or return;

    my @l = get_fstab(@$hds);
    @l == 1 && isFat($l[0]) && free_space(@$hds) < 10 << 11;
}


sub computeSize {
    my ($part, $best, $hds, $suggestions) = @_;
    my $max = $part->{maxsize} || $part->{size};
    return min($max, $best->{size}) unless $best->{ratio};

    my $free_space = free_space(@$hds);
    my @l = my @L = grep { 
	if (!has_mntpoint($_->{mntpoint}, $hds) && $free_space >= $_->{size}) {
	    $free_space -= $_->{size};
	    1;
	} else { 0 } } @$suggestions;

    my $tot_ratios = 0;
    while (1) {
	my $old_free_space = $free_space;
	my $old_tot_ratios = $tot_ratios;

	$tot_ratios = sum(map { $_->{ratio} } @l);
	last if $tot_ratios == $old_tot_ratios;

	@l = grep { 
	    if ($_->{ratio} && $_->{maxsize} && $tot_ratios &&
		$_->{size} + $_->{ratio} / $tot_ratios * $old_free_space >= $_->{maxsize}) {
		return min($max, $best->{maxsize}) if $best->{mntpoint} eq $_->{mntpoint};
		$free_space -= $_->{maxsize} - $_->{size};
		0;
	    } else {
		$_->{ratio};
	    } 
	} @l;
    }
    my $size = int min($max, $best->{size} + $free_space * ($tot_ratios && $best->{ratio} / $tot_ratios));
    #- verify other entry can fill the hole
    if (grep { $_->{size} < $max - $size } @L) { $size } else { $max }
}

sub suggest_part {
    my ($part, $hds, $suggestions) = @_;
    $suggestions ||= $suggestions{server};

    my $has_swap = grep { isSwap($_) } get_fstab(@$hds);

    my ($best, $second) =
      grep { !$_->{maxsize} || $part->{size} <= $_->{maxsize} }
      grep { $_->{size} <= ($part->{maxsize} || $part->{size}) }
      grep { !has_mntpoint($_->{mntpoint}, $hds) || isSwap($_) && !$has_swap }
      grep { !$_->{hd} || $_->{hd} eq $part->{rootDevice} }
      grep { !$part->{type} || $part->{type} == $_->{type} || isTrueFS($part) && isTrueFS($_) }
	@$suggestions or return;

#-    if (arch() =~ /i.86/) {
#-	  $best = $second if
#-	    $best->{mntpoint} eq '/boot' &&
#-	    $part->{start} + $best->{size} > 1024 * $hd->cylinder_size(); #- 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};
    $part->{size} = computeSize($part, $best, $hds, $suggestions);
    1;
}

sub suggestions_mntpoint {
    my ($hds) = @_;
    sort grep { !/swap/ && !has_mntpoint($_, $hds) }
      (@suggestions_mntpoints, map { $_->{mntpoint} } @{$suggestions{server}});
}

#-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 mntpoint2part {
    my ($mntpoint, $fstab) = @_;
    first(grep { $mntpoint eq $_->{mntpoint} } @$fstab);
}
sub has_mntpoint {
    my ($mntpoint, $hds) = @_;
    mntpoint2part($mntpoint, [ get_fstab(@$hds) ]);
}
sub get_root_ {
    my ($fstab, $boot) = @_;
    $boot && mntpoint2part("/boot", $fstab) || mntpoint2part("/", $fstab);
}
sub get_root { &get_root_ || {} }

#- do this before modifying $part->{mntpoint}
#- $part->{mntpoint} should not be used here, use $mntpoint instead
sub check_mntpoint {
    my ($mntpoint, $hd, $part, $hds, $loopbackDevice) = @_;

    ref $loopbackDevice or undef $loopbackDevice;

    $mntpoint eq '' || isSwap($part) || isNonMountable($part) 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\n", $mntpoint);

    my $fake_part = { mntpoint => $mntpoint, device => $loopbackDevice };
    $fake_part->{loopback_file} = 1 if $loopbackDevice;
    my $fstab = [ get_fstab(@$hds), $fake_part ];
    my $check; $check = sub {
	my ($p, @seen) = @_;
	push @seen, $p->{mntpoint} || return;
	@seen > 1 && $p->{mntpoint} eq $mntpoint and die _("Circular mounts %s\n", join(", ", @seen));
	if (my $part = fs::up_mount_point($p->{mntpoint}, $fstab)) {
	    #- '/' carrier is a special case, it will be mounted first
	    $check->($part, @seen) unless loopback::carryRootLoopback($p);
	}
	if (isLoopback($p)) {
	    $check->($p->{device}, @seen);
	}
    };
    $check->($fake_part) unless $mntpoint eq '/' && $loopbackDevice; #- '/' is a special case, no loop check

    die "raid / with no /boot" if $mntpoint eq "/" && isMDRAID($part) && !has_mntpoint("/boot", $hds);
    die _("You can't use a LVM Logical Volume for mount point %s", $mntpoint) if ($mntpoint eq '/' || $mntpoint eq '/boot') && isLVMBased($hd);
    die _("This directory should remain within the root filesystem") if member($mntpoint, qw(/bin /dev /etc /lib /sbin));
    die _("You need a true filesystem (ext2, reiserfs) for this mount point\n") if !isTrueFS($part) && member($mntpoint, qw(/ /home /tmp /usr /var));
#-    if ($part->{start} + $part->{size} > 1024 * $hd->cylinder_size() && arch() =~ /i.86/) {
#-	  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, $options) = @_;

    isSwap($part) ?
      ($part->{mntpoint} = 'swap') :
      $options->{force} || check_mntpoint($part->{mntpoint}, $hd, $part, $hds);

    delete $part->{maxsize};

    if (isLVMBased($hd)) {
	lvm::lv_create($hd, $part);
    } else {
	partition_table::add($hd, $part, $options->{primaryOrExtended});
    }
}

sub allocatePartitions($$) {
    my ($hds, $to_add) = @_;

    foreach my $hd (@$hds) {
	foreach (partition_table::get_holes($hd)) {
	    my ($start, $size) = @$_{"start", "size"};
	    my $part;
	    while (suggest_part($part = { start => $start, size => 0, maxsize => $size, rootDevice => $hd->{device} }, 
				$hds, $to_add)) {
		add($hd, $part, $hds);
		$size -= $part->{size} + $part->{start} - $start;
		$start = $part->{start} + $part->{size};
	    }
	}
    }
}

sub auto_allocate {
    my ($hds, $suggestions) = @_;    
    allocatePartitions($hds, $suggestions || $suggestions{simple});
    map { partition_table::assign_device_numbers($_) } @$hds;
}

sub undo_prepare($) {
    my ($hds) = @_;
    require Data::Dumper;
    $Data::Dumper::Purity = 1;
    foreach (@$hds) {
	my @h = @{$_}{@partition_table::fields2save};
	push @{$_->{undo}}, Data::Dumper->Dump([\@h], ['$h']);
    }
}
sub undo($) {
    my ($hds) = @_;
    foreach (@$hds) {
	my $h; eval pop @{$_->{undo}} || next;
	@{$_}{@partition_table::fields2save} = @$h;

	$_->{isDirty} = $_->{needKernelReread} = 1 if $_->{hasBeenDirty};
    }
}

sub move {
    my ($hd, $part, $hd2, $sector2) = @_;

    my $part1 = { %$part };
    my $part2 = { %$part };
    $part2->{start} = $sector2;
    $part2->{size} += $hd2->cylinder_size() - 1;
    partition_table::remove($hd, $part);
    {
	local ($part2->{notFormatted}, $part2->{isFormatted}); #- do not allow partition::add to change this
	partition_table::add($hd2, $part2);
    }

    return if $part2->{notFormatted} && !$part2->{isFormatted} || $::testing;

    local (*F, *G);
    sysopen F, $hd->{file}, 0 or die '';
    sysopen G, $hd2->{file}, 2 or die _("Error opening %s for writing: %s", $hd2->{file}, "$!");

    my $base = $part1->{start};
    my $base2 = $part2->{start};
    my $step = 10;
    if ($hd eq $hd2) {
	$base == $base2 and return;
	$step = min($step, abs($base2 - $base));

	if ($base < $base2) {
	    $base  += $part1->{size} - $step;
	    $base2 += $part1->{size} - $step;
	    $step = -$step;
	}
    }

    my $f = sub {
	$base  < 0 and $base2 += -$base,  $base  = 0;
	$base2 < 0 and $base  += -$base2, $base2 = 0;
	c::lseek_sector(fileno(F), $base,  0) or die "seeking to sector $base failed on drive $hd->{device}";
	c::lseek_sector(fileno(G), $base2, 0) or die "seeking to sector $base2 failed on drive $hd2->{device}";

	my $buf;
	sysread F, $buf, $SECTORSIZE * abs($_[0]) or die '';
	syswrite G, $buf;
    };

    for (my $i = 0; $i < $part1->{size} / abs($step); $i++, $base += $step, $base2 += $step) {
	print "$base $base2\n";
	&$f($step);
    }
    if (my $v = ($part1->{size} % abs($step)) * sign($step)) {
	$base += $v;
	$base2 += $v;
	&$f($v);
    }
}

sub change_type($$$) {
    my ($hd, $part, $type) = @_;
    $type != $part->{type} or return;
    $hd->{isDirty} = 1;
    $part->{mntpoint} = '' if isSwap($part) && $part->{mntpoint} eq "swap";
    $part->{type} = $type;
    $part->{notFormatted} = 1;
    $part->{isFormatted} = 0;    
}

sub rescuept($) {
    my ($hd) = @_;
    my ($ext, @hd);

    my $dev = devices::make($hd->{device});
    local *F; open F, "rescuept $dev|";
    local $_;
    while (<F>) {
	my ($st, $si, $id) = /start=\s*(\d+),\s*size=\s*(\d+),\s*Id=\s*(\d+)/ or next;
	my $part = { start => $st, size => $si, type => hex($id) };
	if (isExtended($part)) {
	    $ext = $part;
	} else {
	    push @hd, $part;
	}
    }
    close F or die "rescuept failed";

    partition_table_raw::zero_MBR($hd);
    foreach (@hd) {
	my $b = partition_table::verifyInside($_, $ext);
	if ($b) {
	    $_->{start}--;
	    $_->{size}++;
	}
	local $_->{notFormatted};

	partition_table::add($hd, $_, ($b ? 'Extended' : 'Primary'), 1);
    }
}

sub verifyHds {
    my ($hds, $readonly, $ok) = @_;

    if (is_empty_array_ref($hds)) { #- no way
	die _("An error has occurred - no valid devices were found on which to create new filesystems. Please check your hardware for the cause of this problem");
    }

    my @parts = readProcPartitions($hds);
    $ok &&= @parts == listlength(get_fstab(@$hds)) unless arch() eq "ppc";

    if ($readonly && !$ok) {
	log::l("using /proc/partitions as diskdrake failed :(");
	foreach my $hd (@$hds) {
	    partition_table_raw::zero_MBR($hd);
	    $hd->{primary} = { normal => [ grep { $hd->{device} eq $_->{rootDevice} } @parts ] };
	}
	$ok = 1;
    }
    $readonly && get_fstab(@$hds) == 0 and die _("You don't have any partitions!");
    $ok;
}

#-######################################################################################
#- Wonderful perl :(
#-######################################################################################
1; #