summaryrefslogtreecommitdiffstats
path: root/perl-install/fs/dmraid.pm
blob: 892a85d0ac784266cdd85e26bff289e294a2ee7c (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
package fs::dmraid; # $Id: dmraid.pm 265309 2010-01-27 00:28:23Z pterjan $

use diagnostics;
use strict;

#-######################################################################################
#- misc imports
#-######################################################################################
use common;
use modules;
use devices;
use fs::type;
use fs::wild_device;
use run_program;


sub init() {
    whereis_binary('dmraid') or die "dmraid not installed";

    eval { modules::load('dm-mirror', 'dm-zero') };
    devices::init_device_mapper();
    if ($::isInstall) {
	call_dmraid('-ay');
    }
    1;
}

#- call_dmraid is overloaded when debugging, see the end of this file
sub call_dmraid {
    my ($option, @args) = @_;
    run_program::get_stdout('dmraid', $option, @args);
}

sub check {
    my ($in) = @_;

    $in->do_pkgs->ensure_binary_is_installed('dmraid', 'dmraid') or return;
    init();
    1;
}

sub _raid_devices_raw() {
    # get the real vg names, needed for ddf1, and safer than begins_with for raid10
    log::l("_raid_devices_raw");
    my %vgs;
    my %pv2vg = map {
	chomp();
	log::l("got: $_");
	my %l; @l{qw(name size stride level status subsets devs spares)} = split(':');
	$vgs{$l{name}} = 1 if defined $l{spares};
	if (/freeing device "(.*)", path "(.*)"/ && defined $vgs{$1}) {
	    log::l("$2 => $1");
	    { $2 => $1 }
        }
    } call_dmraid(qw(-d -s -c -c));
    map {
	chomp;
	log::l("got: $_");
	my %l; @l{qw(pv format vg level status size)} = split(':');
	if (defined $l{size} && defined $l{vg} && defined $pv2vg{$l{pv}} && !defined $vgs{$l{vg}}) {
	    log::l("using $pv2vg{$l{pv}} instead of $l{vg}");
	    $l{vg} = $pv2vg{$l{pv}};
	}
	if_(defined $l{size}, \%l);
    } call_dmraid(qw(-r -c -c));
}

sub _raid_devices() {
    my @l = _raid_devices_raw();
    my %vg2pv; push @{$vg2pv{$_->{vg}}}, delete $_->{pv} foreach @l;
    my %vg2status; push @{$vg2status{$_->{vg}}}, delete $_->{status} foreach @l;
    map {
	delete $_->{size}; #- now irrelevant
	$_->{disks} = $vg2pv{$_->{vg}};
	$_->{status} = (every { $_ eq 'ok' } @{$vg2status{$_->{vg}}}) ? 'ok' : join(' ', @{$vg2status{$_->{vg}}});
	$_;
    } uniq_ { $_->{vg} } @l;
}

sub _sets_raw() {
    map {
	chomp;
	log::l("got: $_");
	my %l; @l{qw(name size stride level status subsets devs spares)} = split(':');
	if_(defined $l{spares}, \%l);
    } call_dmraid('-s', '-c', '-c');
}

sub _sets() {
    my @sets = _sets_raw();
    my @raid_devices = _raid_devices();
    foreach (@sets) {
	my $name = $_->{name};
	my @l = grep { begins_with($name, $_->{vg}) } @raid_devices;
	log::l("ERROR: multiple match for set $name: " . join(' ', map { $_->{vg} } @l)) if @l > 1;

	@l = grep { begins_with($_->{vg}, $name) } @raid_devices if !@l;
	
	if (@l) {
	    foreach my $raid (@l) {
		push @{$_->{disks}}, @{$raid->{disks}};
		add2hash($_, $raid);
		$_->{status} = $raid->{status} if $_->{status} eq 'ok' && $::isInstall;
	    }
	} else {
	    log::l("ERROR: no matching raid devices for set $name");
	}
    }
    @sets;
}

sub vgs() {
    map {
	my $dev = "mapper/$_->{name}";
	my $vg = fs::wild_device::to_subpart("/dev/$dev");
	add2hash($vg, { media_type => 'hd', bus => "dmraid_$_->{format}", disks => $_->{disks} });

	#- device should exist, created by dmraid(8) using libdevmapper
	#- if it doesn't, we suppose it's not in use
	if_(-e "/dev/$dev", $vg); 

    } grep { 
	if ($_->{status} eq 'ok') {
	    1;
	} else {
	    call_dmraid('-an', $_->{vg}) if $::isInstall; #- for things like bad_sil below, deactivating half activated dmraid
	    0;
	}
    } _sets();
}

# the goal is to handle migration from /dev/mapper/xxx1 to /dev/mapper/xxxp1,
# as used by initrd/nash.
# dmraid has been patched to follow xxxp1 device names.
# so until the box has rebooted on new initrd/dmraid, we must cope with /dev/mapper/xxx1 device names
# (cf #44182)
sub migrate_device_names {
    my ($vg) = @_;

    my $dev_name = basename($vg->{device});
    foreach (all('/dev/mapper')) {
	my ($nb) = /^\Q$dev_name\E(\d+)$/ or next;
	my $new = $dev_name . 'p' . $nb;
	if (! -e "/dev/mapper/$new") {
	    log::l("migrating to $new, creating a compat symlink $_");
	    rename "/dev/mapper/$_", "/dev/mapper/$new";
	    symlink $new, "/dev/mapper/$_";
	}
    }
}

if ($ENV{DRAKX_DEBUG_DMRAID}) {
    eval(<<'EOF');
    my %debug_data = (
    
     isw => {
    
      # dmraid -s ####################
      # *** Group superset isw_ffafgbdhi
      # --> Active Subset
      # name   : isw_ffafgbdhi_toto
      # size   : 234441216
      # stride : 256
      # type   : mirror
      # status : ok
      # subsets: 0
      # devs   : 2
      # spares : 0
    
      '-s' => "isw_ffafgbdhi_toto:234441216:256:mirror:ok:0:2:0\n",
    
      # dmraid -r ####################
      #/dev/sda: isw, "isw_ffafgbdhi", GROUP, ok, 488397166 sectors, data@ 0
      #/dev/sdb: isw, "isw_ffafgbdhi", GROUP, ok, 234441646 sectors, data@ 0
    
      '-r' => "/dev/sda:isw:isw_ffafgbdhi:GROUP:ok:488397166:0\n" .
              "/dev/sdb:isw:isw_ffafgbdhi:GROUP:ok:234441646:0\n",
     },
    
     pdc => {
      # dmraid -s ####################
      # *** Active Set
      # name   : pdc_bcefbiigfg
      # size   : 80043200
      # stride : 128
      # type   : mirror
      # status : ok
      # subsets: 0
      # devs   : 2
      # spares : 0
    
      '-s' => "pdc_bcefbiigfg:80043200:128:mirror:ok:0:2:0\n",
    
      # dmraid -r ####################
      # /dev/sda: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0
      # /dev/sdb: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0
    
      '-r' => "/dev/sda:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n" .
                "/dev/sdb:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n",
     },
    
     bad_sil => {
      '-s' => "sil_aeacdidecbcb:234439600:0:mirror:ok:0:1:0\n",
                # ERROR: sil: only 3/4 metadata areas found on /dev/sdb, electing...

      '-r' => "/dev/sdb:sil:sil_aeacdidecbcb:mirror:broken:234439600:0\n",
                # ERROR: sil: only 3/4 metadata areas found on /dev/sdb, electing...
     },

     weird_nvidia =>  {
      '-s' => <<'EO',
/dev/sda: "sil" and "nvidia" formats discovered (using nvidia)!
/dev/sdb: "sil" and "nvidia" formats discovered (using nvidia)!
nvidia_bcjdbjfa:586114702:128:mirror:ok:0:2:0
EO
       '-r' => <<'EO',
/dev/sda: "sil" and "nvidia" formats discovered (using nvidia)!
/dev/sdb: "sil" and "nvidia" formats discovered (using nvidia)!
/dev/sda:nvidia:nvidia_bcjdbjfa:mirror:ok:586114702:0
/dev/sdb:nvidia:nvidia_bcjdbjfa:mirror:ok:586114702:0
EO
	 # ERROR: multiple match for set nvidia_bcjdbjfa:  nvidia_bcjdbjfa
     },

     nvidia_with_subsets => {
      '-s' => <<'EO',
nvidia_bfcciffh:625163520:128:raid10:ok:2:4:0
EO
       '-r' => <<'EO',
/dev/sda:nvidia:nvidia_bfcciffh-0:stripe:ok:312581806:0
/dev/sdb:nvidia:nvidia_bfcciffh-0:stripe:ok:312581806:0
/dev/sdc:nvidia:nvidia_bfcciffh-1:stripe:ok:312581806:0
/dev/sdd:nvidia:nvidia_bfcciffh-1:stripe:ok:312581806:0
EO
	 # ERROR: multiple match for set nvidia_bcjdbjfa:  nvidia_bcjdbjfa
     },
    );
    
    *call_dmraid = sub {
        my ($option, @args) = @_;
        if (my $s = $debug_data{$ENV{DRAKX_DEBUG_DMRAID}}{$option}) {
            split("\n", $s);
	} else {
            warn "dmraid $option @args\n";
        }
    };
EOF
    $@ and die;
}

1;