summaryrefslogtreecommitdiffstats
path: root/perl-install/standalone/bootloader-config
blob: f59a76067346d57a390e504be28006672806eb18 (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
#!/usr/bin/perl

use lib qw(/usr/lib/libDrakX);
use Getopt::Long;

use common;
use bootloader;

$::isStandalone = 1; #- not using standalone which messes with @ARGV and usage
c::openlog('bootloader-config' . "[$$]");

$ENV{PATH} = "/sbin:/usr/sbin:$ENV{PATH}";

my %options = (
	       'action=s' => \ (my $action),

	       'label=s' => \ (my $label),

	       'chainload=s' => \ (my $chainload),

	       'image=s' => \ (my $image), 
	       'kernel-version=s' => \ (my $kernel_version), 

	       'initrd-options=s' => \ (my $initrd_options),
	       'no-short-name' => \ (my $no_short_name),
	       'no-entry' => \ (my $no_entry),
	       'no-launch' => \ (my $no_launch),
	       'no-initrd' => \ (my $no_initrd),
	      );

GetOptions(%options) && $action or die <<'EOF';
usage: bootloader-config --action add-kernel (--image <vmlinuz> | --kernel-version <2.6.xxx>) [--label <...>] [--no-short-name] [--initrd-options <options>]
       bootloader-config --action remove-kernel (--image <vmlinuz> | --kernel-version <2.6.xxx>)

       bootloader-config --action add-entry (--image <image> | --chainload <device>) --label <...>
       bootloader-config --action remove-entry (--image <image> | --chainload <device> | --label <...>)

       bootloader-config --action update-splash
       bootloader-config --action remove-splash
       bootloader-config --action rebuild-initrds
       bootloader-config --action migrate-to-uuids
EOF

my @known_actions = qw(add-kernel remove-kernel update-splash remove-splash rebuild-initrds migrate-to-uuids detectloader add-entry remove-entry add-resume2);
$action && member($action, @known_actions) or die "<action> must be one of " . join(' ', @known_actions) . "\n";

if ($image) {
    if (my $ver = bootloader::vmlinuz2version($image)) {
	if ($kernel_version) {
	    $kernel_version eq $ver or die "$kernel_version and $ver do not match (hint: do not pass both --image and --kernel-version)\n";
	} else {
	    $kernel_version = $ver;
	}
    }
    $image = "/boot/$image" if $image !~ m!^/!;
} elsif ($kernel_version) {
    $image = find { -e $_ } map { "/boot/$_-$kernel_version" } qw(vmlinux uImage vmlinuz);
}


my $all_hds = fsedit::get_hds();
fs::get_info_from_fstab($all_hds);

my $bootloader;
$bootloader = bootloader::read($all_hds);
if (!$bootloader) {
    if (member($action, 'add-kernel', 'remove-kernel')) {
	if ($no_initrd) {
	    die "Cannot find a bootloader installed and initrd build suppressed\n";
	}
	warn "Cannot find a boot loader installed. Only taking care of initrd\n";
    } else {
	die "Cannot find a boot loader installed\n";
    }
}

$action =~ s/-/_/g;
$::{$action}->();


#-###############################################################################
sub remove_now_broken_boot_symlinks() {
    foreach (glob("/boot/vmlinuz*"), glob("/boot/initrd*")) {
	-l $_ && !-e $_ or next;
	log::l("removing now broken symlink $_");
	unlink $_;
    }
}
sub remove_kernel() {
    unlink "/lib/modules/$kernel_version/build";
    unlink "/lib/modules/$kernel_version/source";
    remove_now_broken_boot_symlinks();

    if (!$bootloader) {
	#- removing the initrd for weird configs where no mdv bootloader is configured
	my $kernel_str = bootloader::vmlinuz2kernel_str($image) or die "bad kernel name $image\n";
	my $initrd_long = bootloader::kernel_str2initrd_long($kernel_str);
	unlink "/boot/$initrd_long";
	return;
    }

    my %proposed_labels;
    my @new_entries;

    my ($to_remove, $to_keep) = partition {
	if ($_->{kernel_or_dev} && $_->{kernel_or_dev} eq $image) {
	    1;
	} else {
	    my $vmlinuz = $_->{kernel_or_dev} && bootloader::expand_vmlinuz_symlink($_->{kernel_or_dev});
	    if ($vmlinuz && "/boot/$vmlinuz" eq $image) {
		#- eg: removing kernel XXX and entry "linux" has /boot/vmlinuz -> vmlinuz-XXX
		#-     so finding out which kernel still installed is better suited to use label "linux"
		if (!%proposed_labels) {
		    %proposed_labels = bootloader::get_kernels_and_labels_before_kernel_remove($vmlinuz); 
		}
		if (my $kernel_str = $proposed_labels{$_->{label}}) {
		    push @new_entries, [ $kernel_str, $_ ];
		    1;
		} else {
		    0;
		}
	    } else {
		0;
	    }
	}
    } @{$bootloader->{entries}};

    $_->{initrd} && unlink $_->{initrd} foreach @$to_remove;

    @{$bootloader->{entries}} = @$to_keep;

    foreach (@new_entries) {
	my ($kernel_str, $v) = @$_;
	bootloader::add_kernel($bootloader, $kernel_str, $v);
    }

    modify_bootloader();
}    


#-###############################################################################
sub add_kernel() {
    configure_ide_controller();
    bootloader::create_link_source();

    my $kernel_str = bootloader::vmlinuz2kernel_str($image) or die "bad kernel name $image\n";

    if (!$bootloader) {
	#- building the initrd for weird configs where no mdv bootloader is configured
	my $fake_bootloader = { vga => undef };
	my %opts = (initrd_options => $initrd_options);
	my $initrd_long = bootloader::kernel_str2initrd_long($kernel_str);
	bootloader::mkinitrd($kernel_str->{version}, $fake_bootloader, { %opts }, "/boot/$initrd_long");
	return;
    }

    my $root_part = fs::get::root([ fs::get::fstab($all_hds) ]) or die "cannot find root partition\n";
    my %opts = (
		root => fs::wild_device::from_part('', $root_part), 
		initrd_options => $initrd_options,
		if_($label, label => $label),
		(grep_each { member($::a, 'vga', 'lock') } %{$bootloader->{default_options}}),
	       );

        #- short name
	bootloader::add_kernel($bootloader, $kernel_str, { %opts }, 0, $no_initrd) if !$no_short_name;

        #- long name
	$kernel_str->{use_long_name} = 1;
        bootloader::add_kernel($bootloader, $kernel_str, { %opts }, 1, $no_initrd);

    modify_bootloader();
}

sub configure_ide_controller() {
    my $modules_conf = modules::any_conf->read;
    if ($modules_conf->get_alias('ide-controller') || 
        $modules_conf->get_probeall('ide-controller')) {
	#- already configured
    } elsif (my @l = detect_devices::probe_category('disk/ide')) {
	$modules_conf->add_probeall('ide-controller', $_->{driver}) foreach @l;
	$modules_conf->write;
    }
}

sub modify_bootloader() {
    !$no_entry or return;

    bootloader::action($bootloader, 'write', $all_hds);
    bootloader::action($bootloader, 'when_config_changed') if !$no_launch;
}

#-###############################################################################
sub add_entry() {
    $label or die "you must give a label\n";
    ($image xor $chainload) or die "you must give an image or a chainload\n";

    my $entry = {
		  type => $image ? 'image' : 'other',
		  label => $label,
		  kernel_or_dev => $image || $chainload,
		 };
    bootloader::add_entry($bootloader, $entry);
    modify_bootloader();
}

sub _get_entry() {
    listlength(grep { $_ } $label, $image, $chainload) == 1 or die "you must give one of --label, --image and --chainload\n";

    $label ? bootloader::get_label($label, $bootloader) : 
             find { $_->{kernel_or_dev} && $_->{kernel_or_dev} eq ($image || $chainload) } @{$bootloader->{entries}};
}

sub remove_entry() {
    my $e = _get_entry() or return;

    @{$bootloader->{entries}} = grep { $_ != $e } @{$bootloader->{entries}};
    modify_bootloader();
}

sub add_resume2() {
    my $e = _get_entry() or return;
   
    my ($simple, $dict) = bootloader::unpack_append($e->{append});
    if (my $resume = find { $_->[0] eq 'resume' } @$dict) {
	if (!any { $_->[0] eq 'resume2' } @$dict) {
	    push @$dict, [ resume2 => "swap:$resume->[1]" ];
	    $e->{append} = bootloader::pack_append($simple, $dict);

	    modify_bootloader();
	}
    }
}

#-###############################################################################
sub rebuild_initrds() {    
    bootloader::rebuild_initrds($bootloader);
    bootloader::action($bootloader, 'when_config_changed') if !$no_launch;
}

#-###############################################################################
sub migrate_to_uuids() {    
    foreach (fs::get::fstab($all_hds)) {
	_add_uuid_to_swap($_) if $_->{fs_type} eq 'swap' && !$_->{device_UUID};
    }

    my $fstab = [ fs::get::fstab($all_hds) ];

    _migrate_to_uuids__fstab($fstab);

    my $bootloader_migrated;
    my $may_migrate = sub {
	my ($label, $dev_ref) = @_;
	my $dev_ = _migrate_dev_to_uuid($fstab, $$dev_ref) or return;

	log::l("migrate_to_uuids: migrating bootloader $label=$$dev_ref entry");
	$$dev_ref = $dev_;
	$bootloader_migrated = 1;
    };
    # migrate root=
    $may_migrate->('root', \$_->{root}) foreach grep { !$_->{keep_verbatim} } @{$bootloader->{entries}};

    # migrate resume=
    bootloader::modify_append($bootloader, sub {
	my ($_simple, $dict) = @_;
	foreach (grep { $_->[0] eq 'resume' } @$dict) {
	    $may_migrate->($_->[0], \$_->[1]);
	}
    });

    if ($bootloader_migrated) {
	bootloader::action($bootloader, 'write', $all_hds, '.before-migrate-to-uuids');
	bootloader::action($bootloader, 'when_config_changed');
    }
}

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

    my @raw_fstab = fs::read_fstab('', '/etc/fstab', 'keep_freq_passno', 'verbatim_credentials');

    my $fstab_migrated;
    foreach my $part (@raw_fstab) {
	_should_prefer_UUID($part) or next;

	my $part_ = find { fs::get::is_same_hd($part, $_) } @$fstab
	  or log::l("migrate_to_uuids: do not know $part->{device}, cannot migrate it"), next;

	$part->{device_UUID} = $part_->{device_UUID}
	  or log::l("migrate_to_uuids: no UUID for $part->{device}, cannot migrate it"), next;
	$part->{prefer_device_UUID} = 1;
	$part->{prefer_device} = 0;
	delete $part->{device_alias} if $part->{device_alias} && $part->{device_alias} =~ m!\bmapper/!; # see fs::dmraid::migrate_device_names() for more

	log::l("migrate_to_uuids: migrating fstab $part->{device} entry");
	$fstab_migrated = 1;
    }
    if ($fstab_migrated) {
	cp_af('/etc/fstab', '/etc/fstab.before-migrate-to-uuids');

	my ($s) = fs::prepare_write_fstab(\@raw_fstab, '', 'keep_smb_credentials');
	output('/etc/fstab', $s);
    }
}

sub _migrate_dev_to_uuid {
    my ($fstab, $dev) = @_;
    $dev && $dev =~ m!/dev/! or return;

    my $part = fs::get::device2part($dev, $fstab);
    _should_prefer_UUID($part) or return;
    $part && $part->{device_UUID} && "UUID=$part->{device_UUID}";
}

sub _should_prefer_UUID {
    my ($part) = @_;
    devices::should_prefer_UUID($part->{device})
	|| $part->{device} =~ m!\bmapper/!; # we want to migrate dmraid devices, because of xxx1 vs xxxp1 device name issue
}

# add UUID to swap v.2 in case the swap was created long ago when mkswap didn't do it by default
sub _add_uuid_to_swap {
    my ($part) = @_;

    my $ids = fs::type::call_blkid($part);
    $ids->{ID_FS_VERSION} eq '2' 
      or log::l("ERROR: do not know swap version $ids->{ID_FS_VERSION}, so cannot add UUID to it"), return;

    my $uuid = run_program::get_stdout('uuidgen');
    log::l("adding UUID=$uuid to $part->{device}");
    $uuid =~ s/-//g; 
    $uuid =~ s/(..)/chr(hex($1))/ge;

    {
	my $F;
	sysopen($F, devices::make($part->{device}), 2) or die "error opening device $part->{device} for writing";
	sysseek($F, 1036, 0) && syswrite($F, $uuid) or log::l("writing UUID failed");
    }

    if (my $p = fs::type::type_subpart_from_magic($part)) {
	$part->{device_UUID} = $p->{device_UUID};
    }
}

#-###############################################################################
sub update_splash() {
    bootloader::update_splash($bootloader);
    bootloader::action($bootloader, 'when_config_changed') if !$no_launch;
}

sub remove_splash() {
    foreach (@{$bootloader->{entries}}) {
	bootloader::remove_boot_splash($_->{initrd}) if $_->{initrd};
    }
    bootloader::action($bootloader, 'when_config_changed') if !$no_launch;
}

sub detectloader() {
    print uc(bootloader::main_method($bootloader->{method})), "\n" if $bootloader;
}