summaryrefslogtreecommitdiffstats
path: root/perl-install/fs.pm
blob: 36e9f63819a485d35df5c0fbd3d63933bf261a0f (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
package fs; # $Id$

use diagnostics;
use strict;

use MDK::Common::System;
use common;
use log;
use devices;
use partition_table qw(:types);
use run_program;
use swap;
use detect_devices;
use commands;
use modules;
use fsedit;
use loopback;

1;

sub add_options(\$@) {
    my ($option, @options) = @_;
    my %l; @l{split(',', $$option), @options} = (); delete $l{defaults};
    $$option = join(',', keys %l) || "defaults";
}

sub read_fstab($) {
    my ($file) = @_;

    local *F;
    open F, $file or return;

    map {
	my ($dev, @l) = split;
	$dev =~ s,/(tmp|dev)/,,;
	{ device => $dev, mntpoint => $l[0], type => $l[1], options => $l[2] }
    } <F>;
}

sub up_mount_point {
    my ($mntpoint, $fstab) = @_;
    while (1) {
	$mntpoint = dirname($mntpoint);
	$mntpoint ne "." or return;
	$_->{mntpoint} eq $mntpoint and return $_ foreach @$fstab;
    }
}

sub check_mounted($) {
    my ($fstab) = @_;

    local (*F, *G, *H);
    open F, "/etc/mtab";
    open G, "/proc/mounts";
    open H, "/proc/swaps";
    foreach (<F>, <G>, <H>) {
	foreach my $p (@$fstab) {
	    /$p->{device}\s+([^\s]*)\s+/ and $p->{mntpoint} = $1, $p->{isMounted} = $p->{isFormatted} = 1;
	}
    }
}

sub get_mntpoints_from_fstab {
    my ($fstab, $prefix, $uniq) = @_;

    log::l("reading fstab");
    foreach (read_fstab("$prefix/etc/fstab")) {
	next if $uniq && fsedit::mntpoint2part($_->{mntpoint}, $fstab);

	foreach my $p (@$fstab) {
	    $p->{device} eq $_->{device} or next;
	    $_->{type} ne 'auto' && $_->{type} ne type2fs($p->{type}) and
		log::l("err, fstab and partition table do not agree for $_->{device} type: " . (type2fs($p->{type}) || type2name($p->{type})) . " vs $_->{type}"), next;
	    delete $p->{unsafeMntpoint} || !$p->{mntpoint} or next;
	    $p->{mntpoint} = $_->{mntpoint};
	    $p->{options} = $_->{options};
	}
    }
}

#- mke2fs -b (1024|2048|4096) -c -i(1024 > 262144) -N (1 > 100000000) -m (0-100%) -L volume-label
#- tune2fs
sub format_ext2($@) {
    my ($dev, @options) = @_;

    $dev =~ m,(rd|ida|cciss)/, and push @options, qw(-b 4096 -R stride=16); #- For RAID only.
    push @options, qw(-b 1024 -O none) if arch() =~ /alpha/;

    run_program::run("mke2fs", @options, devices::make($dev)) or die _("%s formatting of %s failed", "ext2", $dev);
}

sub format_reiserfs($@) {
    my ($dev, @options) = @_;

    #TODO add -h tea
    run_program::run("mkreiserfs", "-f", "-q", @options, devices::make($dev)) or die _("%s formatting of %s failed", "reiserfs", $dev);
}

sub format_xfs($@) {
    my ($dev, @options) = @_;

    run_program::run("mkfs.xfs", "-f", "-q", @options, devices::make($dev)) or die _("%s formatting of %s failed", "xfs", $dev);
}

sub format_dos($@) {
    my ($dev, @options) = @_;

    run_program::run("mkdosfs", @options, devices::make($dev)) or die _("%s formatting of %s failed", "dos", $dev);
}

sub format_hfs($@) {
    my ($dev, @options) = @_;

    run_program::run("hformat", @options, devices::make($dev)) or die _("%s formatting of %s failed", "HFS", $dev);
}

sub real_format_part {
    my ($part) = @_;

    $part->{isFormatted} and return;

    my @options = $part->{toFormatCheck} ? "-c" : ();
    log::l("formatting device $part->{device} (type ", type2name($part->{type}), ")");

    if (isExt2($part)) {
	push @options, "-F" if isLoopback($part);
	format_ext2($part->{device}, @options);
    } elsif (isReiserfs($part)) {
        format_reiserfs($part->{device}, @options, if_(c::kernel_version() =~ /^\Q2.2/, "-v", "1"));
    } elsif (isXfs($part)) {
        format_xfs($part->{device}, @options);
    } elsif (isDos($part)) {
        format_dos($part->{device}, @options);
    } elsif (isWin($part)) {
        format_dos($part->{device}, @options, '-F', 32);
    } elsif (isHFS($part)) {
        format_hfs($part->{device}, @options, '-l', "Untitled");
    } elsif (isAppleBootstrap($part)) {
        format_hfs($part->{device}, @options, '-l', "bootstrap");
    } elsif (isSwap($part)) {
	my $check_blocks = grep { /^-c$/ } @options;
        swap::make($part->{device}, $check_blocks);
    } else {
	die _("I don't know how to format %s in type %s", $_->{device}, type2name($_->{type}));
    }
    $part->{isFormatted} = 1;
}
sub format_part {
    my ($raid, $part, $prefix) = @_;
    if (isMDRAID($part)) {
	require raid;
	raid::format_part($raid, $part);
    } elsif (isLoopback($part)) {
	loopback::format_part($part, $prefix);
    } else {
	real_format_part($part);
    }
}

sub formatMount_part {
    my ($part, $raid, $fstab, $prefix, $callback) = @_;

    if (isLoopback($part)) {
	formatMount_part($part->{device}, $raid, $fstab, $prefix, $callback);
    }
    if (my $p = up_mount_point($part->{mntpoint}, $fstab)) {
	formatMount_part($p, $raid, $fstab, $prefix, $callback) unless loopback::carryRootLoopback($part);
    }

    if ($part->{toFormat}) {
	$callback->($part) if $callback;
	format_part($raid, $part, $prefix);
    }
    mount_part($part, $prefix);
}

sub formatMount_all {
    my ($raid, $fstab, $prefix, $callback) = @_;
    formatMount_part($_, $raid, $fstab, $prefix, $callback) 
      foreach sort { isLoopback($a) ? 1 : isSwap($a) ? -1 : 0 } grep { $_->{mntpoint} } @$fstab;

    #- ensure the link is there
    loopback::carryRootCreateSymlink($_, $prefix) foreach @$fstab;

    #- for fun :)
    #- that way, when install exits via ctrl-c, it gives hand to partition
    eval {
	local $SIG{__DIE__} = 'ignore';
	my ($type, $major, $minor) = devices::entry(fsedit::get_root($fstab)->{device});
	output "/proc/sys/kernel/real-root-dev", makedev($major, $minor);
    };
}

sub mount($$$;$) {
    my ($dev, $where, $fs, $rdonly) = @_;
    log::l("mounting $dev on $where as type $fs");

    -d $where or commands::mkdir_('-p', $where);

    if ($fs eq 'nfs') {
	log::l("calling nfs::mount($dev, $where)");
#	nfs::mount($dev, $where) or die _("nfs mount failed");
    } elsif ($fs eq 'smb') {
	die "no smb yet...";
    } else {
	$dev = devices::make($dev) if $fs ne 'proc' && $fs ne 'usbdevfs';

	my $flag = c::MS_MGC_VAL();
	$flag |= c::MS_RDONLY() if $rdonly;
	my $mount_opt = "";

	if ($fs eq 'vfat') {
	    $mount_opt = 'check=relaxed';
	    eval { modules::load('vfat') }; #- try using vfat
	    eval { modules::load('msdos') } if $@; #- otherwise msdos...
	} elsif ($fs eq 'hfs') {
	    eval { modules::load('hfs') };
	} elsif ($fs eq 'ufs') {
	    eval { modules::load('ufs') };
	} elsif ($fs eq 'xfs') {
	    eval { modules::load('xfs') };
	} elsif ($fs eq 'reiserfs') {
	    #- could be better if we knew if there is a /boot or not
	    #- without knowing it, / is forced to be mounted with notail
	    # if $where =~ m|/(boot)?$|;
	    $mount_opt = 'notail'; #- notail in any case
	    eval { modules::load('reiserfs') };
	} elsif ($fs eq 'romfs') {
	    eval { modules::load('romfs') };
	} elsif ($fs eq 'ext2') {
	    run_program::run("fsck.ext2", "-a", $dev);
	    $? & 0x0100 and log::l("fsck corrected partition $dev");
	    $? & 0xfeff and die _("fsck failed with exit code %d or signal %d", $? >> 8, $? & 255);
	}

	$where =~ s|/$||;
	log::l("calling mount($dev, $where, $fs, $flag, $mount_opt)");
	syscall_('mount', $dev, $where, $fs, $flag, $mount_opt) or die _("mount failed: ") . "$!";
    }
    local *F;
    open F, ">>/etc/mtab" or return; #- fail silently, must be read-only /etc
    print F "$dev $where $fs defaults 0 0\n";
}

#- takes the mount point to umount (can also be the device)
sub umount($) {
    my ($mntpoint) = @_;
    $mntpoint =~ s|/$||;
    log::l("calling umount($mntpoint)");
    syscall_('umount', $mntpoint) or die _("error unmounting %s: %s", $mntpoint, "$!");

    substInFile { $_ = '' if /(^|\s)$mntpoint\s/ } '/etc/mtab'; #- don't care about error, if we can't read, we won't manage to write... (and mess mtab)
}

sub mount_part($;$$) {
    my ($part, $prefix, $rdonly) = @_;

    #- root carrier's link can't be mounted
    loopback::carryRootCreateSymlink($part, $prefix);

    return if $part->{isMounted};

    unless ($::testing) {
	if (isSwap($part)) {
	    swap::swapon(isLoopback($part) ? $prefix . loopback::file($part) : $part->{device});
	} else {
	    $part->{mntpoint} or die "missing mount point";

	    my $dev = $part->{device};
	    my $mntpoint = ($prefix || '') . $part->{mntpoint};
	    if (isLoopback($part)) {
		eval { modules::load('loop') };
		$dev = $part->{real_device} = devices::set_loop($prefix . loopback::file($part)) || die;
	    } elsif (loopback::carryRootLoopback($part)) {
		$mntpoint = "/initrd/loopfs";
	    }
	    mount(devices::make($dev), $mntpoint, type2fs($part->{type}), $rdonly);
	    rmdir "$mntpoint/lost+found";
	}
    }
    $part->{isMounted} = $part->{isFormatted} = 1; #- assume that if mount works, partition is formatted
}

sub umount_part($;$) {
    my ($part, $prefix) = @_;

    $part->{isMounted} or return;

    unless ($::testing) {
	if (isSwap($part)) {
	    swap::swapoff($part->{device});
	} elsif (loopback::carryRootLoopback($part)) {
	    umount("/initrd/loopfs");
	} else {
	    umount(($prefix || '') . $part->{mntpoint} || devices::make($part->{device}));
	    c::del_loop(delete $part->{real_device}) if isLoopback($part);
	}
    }
    $part->{isMounted} = 0;
}

sub mount_all($;$$) {
    my ($fstab, $prefix) = @_;

    #- TODO fsck, create check_mount_all ?
    log::l("mounting all filesystems");

    #- order mount by alphabetical ordre, that way / < /home < /home/httpd...
    foreach (sort { $a->{mntpoint} cmp $b->{mntpoint} } grep { isSwap($_) || $_->{mntpoint} && isTrueFS($_) } @$fstab) {
	mount_part($_, $prefix);
    }
}

sub umount_all($;$) {
    my ($fstab, $prefix) = @_;

    log::l("unmounting all filesystems");

    foreach (sort { $b->{mntpoint} cmp $a->{mntpoint} } @$fstab) {
	$_->{mntpoint} and umount_part($_, $prefix);
    }
}

sub df {
    my ($part, $prefix) = @_;
    my $dir = "/tmp/tmp_fs_df";

    return $part->{free} if exists $part->{free};

    if ($part->{isMounted}) {
	$dir = ($prefix || '') . $part->{mntpoint};
    } elsif ($part->{notFormatted} && !$part->{isFormatted}) {
	return; #- won't even try!
    } else {
	mkdir $dir;
	eval { mount($part->{device}, $dir, type2fs($part->{type}), 'readonly') };
	if ($@) {
	    $part->{notFormatted} = 1;
	    $part->{isFormatted} = 0;
	    unlink $dir;
	    return;
	}
    }
    my (undef, $free) = MDK::Common::System::df($dir);

    if (!$part->{isMounted}) {
	umount($dir);
	unlink($dir)
    }

    $part->{free} = 2 * $free if defined $free;
    $part->{free};
}

#- do some stuff before calling write_fstab
sub write {
    my ($prefix, $fstab, $manualFstab, $useSupermount, $options) = @_;
    $fstab = [ @{$fstab||[]}, @{$manualFstab||[]} ];

    unless ($::live) {
	log::l("resetting /etc/mtab");
	local *F;
	open F, "> $prefix/etc/mtab" or die "error resetting $prefix/etc/mtab";
    }

    my $floppy = detect_devices::floppy();

    my @to_add = (
       $useSupermount ?
       [ split ' ', "/mnt/floppy /mnt/floppy supermount fs=vfat,dev=/dev/$floppy 0 0" ] :
       [ split ' ', "/dev/$floppy /mnt/floppy auto sync,user,noauto,nosuid,nodev 0 0" ],
       [ split ' ', 'none /proc proc defaults 0 0' ],
       [ split ' ', 'none /dev/pts devpts mode=0620 0 0' ],
       (map_index {
	   my $i = $::i ? $::i + 1 : '';
	   mkdir "$prefix/mnt/cdrom$i", 0755;#- or log::l("failed to mkdir $prefix/mnt/cdrom$i: $!");
	   symlinkf $_->{device}, "$prefix/dev/cdrom$i" or log::l("failed to symlink $prefix/dev/cdrom$i: $!");
	   chown 0, 22, "$prefix/dev/$_->{device}";
	   $useSupermount ?
	     [ "/mnt/cdrom$i", "/mnt/cdrom$i", "supermount", "fs=iso9660,dev=/dev/cdrom$i", 0, 0 ] :
	     [ "/dev/cdrom$i", "/mnt/cdrom$i", "auto", "user,noauto,nosuid,exec,nodev,ro", 0, 0 ];
       } detect_devices::cdroms()),
       (map_index { #- for zip drives, the right partition is the 4th by default.
	   my $i = $::i ? $::i + 1 : '';
	   mkdir "$prefix/mnt/zip$i", 0755 or log::l("failed to mkdir $prefix/mnt/zip$i: $!");
	   symlinkf "$_->{device}4", "$prefix/dev/zip$i" or log::l("failed to symlink $prefix/dev/zip$i: $!");
	   $useSupermount ?
	     [ "/mnt/zip$i", "/mnt/zip$i", "supermount", "fs=vfat,dev=/dev/zip$i", 0, 0 ] :
	     [ "/dev/zip$i", "/mnt/zip$i", "auto", "user,noauto,nosuid,exec,nodev", 0, 0 ];
       } detect_devices::zips()));
    write_fstab($fstab, $prefix, $options, @to_add);
}

sub write_fstab($;$$@) {
    my ($fstab, $prefix, $options, @to_add) = @_;
    $prefix ||= '';

    my $format_options = sub { 
	my ($default, @l) = @_;
	join(',', $default, map { "$_=$options->{$_}" } grep { $options->{$_} } @l);
    };

    unshift @to_add, map {
	my ($dir, $options, $freq, $passno) = qw(/dev/ defaults 0 0);
	$options = $_->{options} || $options;
	
	isTrueFS($_) and ($freq, $passno) = (1, ($_->{mntpoint} eq '/') ? 1 : 2);
	isNfs($_) and $dir = '', $options = $_->{options} || $format_options->('ro,nosuid,rsize=8192,wsize=8192', 'iocharset');
	isFat($_) and $options = $_->{options} || $format_options->("user,exec,umask=0", 'codepage', 'iocharset');
	
	#isReiserfs($_) && $_ == fsedit::get_root($fstab, 'boot') and add_options($options, "notail");
	
	my $dev = isLoopback($_) ?
	  ($_->{mntpoint} eq '/' ? "/initrd/loopfs$_->{loopback_file}" : loopback::file($_)) :
	  ($_->{device} =~ /^\// ? $_->{device} : "$dir$_->{device}");
	
	local $_->{mntpoint} = do { 
	    $passno = 0;
	    "/initrd/loopfs";
	} if loopback::carryRootLoopback($_);
	
	add_options($options, "loop") if isLoopback($_) && !isSwap($_); #- no need for loop option for swap files
	
	eval { devices::make("$prefix/$dev") } if $dir && !isLoopback($_);
	mkdir "$prefix/$_->{mntpoint}", 0755 if $_->{mntpoint} && !isSwap($_);
	
	[ $dev, $_->{mntpoint}, type2fs($_->{type}), $options, $freq, $passno ];
	
    } grep { $_->{mntpoint} && type2fs($_->{type}) } @$fstab;

    push @to_add, map { [ split ] } cat_("$prefix/etc/fstab");

    my %new;
    @to_add = grep { 
	if (($_->[0] eq 'none' || !$new{$_->[0]}) && !$new{$_->[1]}) {
	    #- keep in mind the new line for fstab.
	    @new{$_->[0], $_->[1]} = (1, 1);
	    1;
	} else {
	    0;
	}
    } @to_add;

    log::l("writing $prefix/etc/fstab");
    local *F;
    open F, "> $prefix/etc/fstab" or die "error writing $prefix/etc/fstab";
    print F join(" ", @$_), "\n" foreach sort { $a->[1] cmp $b->[1] } @to_add;
}

sub merge_fstabs {
    my ($fstab, $manualFstab) = @_;
    my %l; $l{$_->{device}} = $_ foreach @$manualFstab;
    put_in_hash($_, $l{$_->{device}}) foreach @$fstab;
}

#sub check_mount_all_fstab($;$) {
#    my ($fstab, $prefix) = @_;
#    $prefix ||= '';
#
#    foreach (sort { ($a->{mntpoint} || '') cmp ($b->{mntpoint} || '') } @$fstab) {
#	 #- avoid unwanted mount in fstab.
#	 next if ($_->{device} =~ /none/ || $_->{type} =~ /nfs|smbfs|ncpfs|proc/ || $_->{options} =~ /noauto|ro/);
#
#	 #- TODO fsck
#
#	 eval { mount(devices::make($_->{device}), $prefix . $_->{mntpoint}, $_->{type}, 0); };
#	 if ($@) {
#	     log::l("unable to mount partition $_->{device} on $prefix/$_->{mntpoint}");
#	 }
#    }
#}