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1 | package PVE::Diskmanage; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use PVE::ProcFSTools; | |
6 | use Data::Dumper; | |
7 | use Cwd qw(abs_path); | |
8 | use Fcntl ':mode'; | |
9 | ||
10 | use PVE::Tools qw(extract_param run_command file_get_contents file_read_firstline dir_glob_regex dir_glob_foreach trim); | |
11 | ||
12 | my $SMARTCTL = "/usr/sbin/smartctl"; | |
13 | my $ZPOOL = "/sbin/zpool"; | |
14 | my $SGDISK = "/sbin/sgdisk"; | |
15 | my $PVS = "/sbin/pvs"; | |
16 | my $UDEVADM = "/bin/udevadm"; | |
17 | ||
18 | sub verify_blockdev_path { | |
19 | my ($rel_path) = @_; | |
20 | ||
21 | die "missing path" if !$rel_path; | |
22 | my $path = abs_path($rel_path); | |
23 | die "failed to get absolute path to $rel_path\n" if !$path; | |
24 | ||
25 | die "got unusual device path '$path'\n" if $path !~ m|^/dev/(.*)$|; | |
26 | ||
27 | $path = "/dev/$1"; # untaint | |
28 | ||
29 | assert_blockdev($path); | |
30 | ||
31 | return $path; | |
32 | } | |
33 | ||
34 | sub assert_blockdev { | |
35 | my ($dev, $noerr) = @_; | |
36 | ||
37 | if ($dev !~ m|^/dev/| || !(-b $dev)) { | |
38 | return undef if $noerr; | |
39 | die "not a valid block device\n"; | |
40 | } | |
41 | ||
42 | return 1; | |
43 | } | |
44 | ||
45 | sub init_disk { | |
46 | my ($disk, $uuid) = @_; | |
47 | ||
48 | assert_blockdev($disk); | |
49 | ||
50 | # we should already have checked if it is in use in the api call | |
51 | # but we check again for safety | |
52 | die "disk $disk is already in use\n" if disk_is_used($disk); | |
53 | ||
54 | my $id = $uuid || 'R'; | |
55 | run_command([$SGDISK, $disk, '-U', $id]); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | sub disk_is_used { | |
60 | my ($disk) = @_; | |
61 | ||
62 | my $dev = $disk; | |
63 | $dev =~ s|^/dev/||; | |
64 | ||
65 | my $disklist = get_disks($dev, 1); | |
66 | ||
67 | die "'$disk' is not a valid local disk\n" if !defined($disklist->{$dev}); | |
68 | return 1 if $disklist->{$dev}->{used}; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | sub get_smart_data { | |
74 | my ($disk, $healthonly) = @_; | |
75 | ||
76 | assert_blockdev($disk); | |
77 | my $smartdata = {}; | |
78 | my $type; | |
79 | ||
80 | my $returncode = 0; | |
81 | ||
82 | $disk =~ s/n\d+$// | |
83 | if $disk =~ m!^/dev/nvme\d+n\d+$!; | |
84 | ||
85 | my $cmd = [$SMARTCTL, '-H']; | |
86 | push @$cmd, '-A', '-f', 'brief' if !$healthonly; | |
87 | push @$cmd, $disk; | |
88 | ||
89 | eval { | |
90 | $returncode = run_command($cmd, noerr => 1, outfunc => sub{ | |
91 | my ($line) = @_; | |
92 | ||
93 | # ATA SMART attributes, e.g.: | |
94 | # ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE | |
95 | # 1 Raw_Read_Error_Rate POSR-K 100 100 000 - 0 | |
96 | # | |
97 | # SAS and NVME disks, e.g.: | |
98 | # Data Units Written: 5,584,952 [2.85 TB] | |
99 | # Accumulated start-stop cycles: 34 | |
100 | ||
101 | if (defined($type) && $type eq 'ata' && $line =~ m/^([ \d]{2}\d)\s+(\S+)\s+(\S{6})\s+(\d+)\s+(\d+)\s+(\S+)\s+(\S+)\s+(.*)$/) { | |
102 | my $entry = {}; | |
103 | ||
104 | ||
105 | $entry->{name} = $2 if defined $2; | |
106 | $entry->{flags} = $3 if defined $3; | |
107 | # the +0 makes a number out of the strings | |
108 | $entry->{value} = $4+0 if defined $4; | |
109 | $entry->{worst} = $5+0 if defined $5; | |
110 | # some disks report the default threshold as --- instead of 000 | |
111 | if (defined($6) && $6 eq '---') { | |
112 | $entry->{threshold} = 0; | |
113 | } else { | |
114 | $entry->{threshold} = $6+0 if defined $6; | |
115 | } | |
116 | $entry->{fail} = $7 if defined $7; | |
117 | $entry->{raw} = $8 if defined $8; | |
118 | $entry->{id} = $1 if defined $1; | |
119 | push @{$smartdata->{attributes}}, $entry; | |
120 | } elsif ($line =~ m/(?:Health Status|self\-assessment test result): (.*)$/ ) { | |
121 | $smartdata->{health} = $1; | |
122 | } elsif ($line =~ m/Vendor Specific SMART Attributes with Thresholds:/) { | |
123 | $type = 'ata'; | |
124 | delete $smartdata->{text}; | |
125 | } elsif ($line =~ m/=== START OF (READ )?SMART DATA SECTION ===/) { | |
126 | $type = 'text'; | |
127 | } elsif (defined($type) && $type eq 'text') { | |
128 | $smartdata->{text} = '' if !defined $smartdata->{text}; | |
129 | $smartdata->{text} .= "$line\n"; | |
130 | } elsif ($line =~ m/SMART Disabled/) { | |
131 | $smartdata->{health} = "SMART Disabled"; | |
132 | } | |
133 | }); | |
134 | }; | |
135 | my $err = $@; | |
136 | ||
137 | # bit 0 and 1 mark an severe smartctl error | |
138 | # all others are for disk status, so ignore them | |
139 | # see smartctl(8) | |
140 | if ((defined($returncode) && ($returncode & 0b00000011)) || $err) { | |
141 | die "Error getting S.M.A.R.T. data: Exit code: $returncode\n"; | |
142 | } | |
143 | ||
144 | $smartdata->{type} = $type; | |
145 | ||
146 | return $smartdata; | |
147 | } | |
148 | ||
149 | sub get_zfs_devices { | |
150 | my $list = {}; | |
151 | ||
152 | # use zpool and parttype uuid, | |
153 | # because log and cache do not have | |
154 | # zfs type uuid | |
155 | eval { | |
156 | run_command([$ZPOOL, 'list', '-HPLv'], outfunc => sub { | |
157 | my ($line) = @_; | |
158 | ||
159 | if ($line =~ m|^\t([^\t]+)\t|) { | |
160 | $list->{$1} = 1; | |
161 | } | |
162 | }); | |
163 | }; | |
164 | ||
165 | # only warn here, | |
166 | # because maybe zfs tools are not installed | |
167 | warn "$@\n" if $@; | |
168 | ||
169 | my $applezfsuuid = "6a898cc3-1dd2-11b2-99a6-080020736631"; | |
170 | my $bsdzfsuuid = "516e7cba-6ecf-11d6-8ff8-00022d09712b"; | |
171 | ||
172 | dir_glob_foreach('/dev/disk/by-parttypeuuid', "($applezfsuuid|$bsdzfsuuid)\..+", sub { | |
173 | my ($entry) = @_; | |
174 | my $real_dev = abs_path("/dev/disk/by-parttypeuuid/$entry"); | |
175 | $list->{$real_dev} = 1; | |
176 | }); | |
177 | ||
178 | return $list; | |
179 | } | |
180 | ||
181 | sub get_lvm_devices { | |
182 | my $list = {}; | |
183 | eval { | |
184 | run_command([$PVS, '--noheadings', '--readonly', '-o', 'pv_name'], outfunc => sub{ | |
185 | my ($line) = @_; | |
186 | $line = trim($line); | |
187 | if ($line =~ m|^/dev/|) { | |
188 | $list->{$line} = 1; | |
189 | } | |
190 | }); | |
191 | }; | |
192 | ||
193 | # if something goes wrong, we do not want | |
194 | # to give up, but indicate an error has occured | |
195 | warn "$@\n" if $@; | |
196 | ||
197 | my $lvmuuid = "e6d6d379-f507-44c2-a23c-238f2a3df928"; | |
198 | ||
199 | dir_glob_foreach('/dev/disk/by-parttypeuuid', "$lvmuuid\..+", sub { | |
200 | my ($entry) = @_; | |
201 | my $real_dev = abs_path("/dev/disk/by-parttypeuuid/$entry"); | |
202 | $list->{$real_dev} = 1; | |
203 | }); | |
204 | ||
205 | return $list; | |
206 | } | |
207 | ||
208 | sub get_ceph_journals { | |
209 | my $journalhash = {}; | |
210 | ||
211 | my $journal_uuid = '45b0969e-9b03-4f30-b4c6-b4b80ceff106'; | |
212 | my $db_uuid = '30cd0809-c2b2-499c-8879-2d6b78529876'; | |
213 | my $wal_uuid = '5ce17fce-4087-4169-b7ff-056cc58473f9'; | |
214 | my $block_uuid = 'cafecafe-9b03-4f30-b4c6-b4b80ceff106'; | |
215 | ||
216 | dir_glob_foreach('/dev/disk/by-parttypeuuid', "($journal_uuid|$db_uuid|$wal_uuid|$block_uuid)\..+", sub { | |
217 | my ($entry, $type) = @_; | |
218 | my $real_dev = abs_path("/dev/disk/by-parttypeuuid/$entry"); | |
219 | if ($type eq $journal_uuid) { | |
220 | $journalhash->{$real_dev} = 1; | |
221 | } elsif ($type eq $db_uuid) { | |
222 | $journalhash->{$real_dev} = 2; | |
223 | } elsif ($type eq $wal_uuid) { | |
224 | $journalhash->{$real_dev} = 3; | |
225 | } elsif ($type eq $block_uuid) { | |
226 | $journalhash->{$real_dev} = 4; | |
227 | } | |
228 | }); | |
229 | ||
230 | return $journalhash; | |
231 | } | |
232 | ||
233 | sub get_udev_info { | |
234 | my ($dev) = @_; | |
235 | ||
236 | my $info = ""; | |
237 | my $data = {}; | |
238 | eval { | |
239 | run_command([$UDEVADM, 'info', '-p', $dev, '--query', 'all'], outfunc => sub { | |
240 | my ($line) = @_; | |
241 | $info .= "$line\n"; | |
242 | }); | |
243 | }; | |
244 | warn $@ if $@; | |
245 | return undef if !$info; | |
246 | ||
247 | return undef if $info !~ m/^E: DEVTYPE=disk$/m; | |
248 | return undef if $info =~ m/^E: ID_CDROM/m; | |
249 | ||
250 | # we use this, because some disks are not simply in /dev | |
251 | # e.g. /dev/cciss/c0d0 | |
252 | if ($info =~ m/^E: DEVNAME=(\S+)$/m) { | |
253 | $data->{devpath} = $1; | |
254 | } | |
255 | return if !defined($data->{devpath}); | |
256 | ||
257 | $data->{serial} = 'unknown'; | |
258 | if ($info =~ m/^E: ID_SERIAL_SHORT=(\S+)$/m) { | |
259 | $data->{serial} = $1; | |
260 | } | |
261 | ||
262 | $data->{gpt} = 0; | |
263 | if ($info =~ m/^E: ID_PART_TABLE_TYPE=gpt$/m) { | |
264 | $data->{gpt} = 1; | |
265 | } | |
266 | ||
267 | # detect SSD | |
268 | $data->{rpm} = -1; | |
269 | if ($info =~ m/^E: ID_ATA_ROTATION_RATE_RPM=(\d+)$/m) { | |
270 | $data->{rpm} = $1; | |
271 | } | |
272 | ||
273 | if ($info =~ m/^E: ID_BUS=usb$/m) { | |
274 | $data->{usb} = 1; | |
275 | } | |
276 | ||
277 | if ($info =~ m/^E: ID_MODEL=(.+)$/m) { | |
278 | $data->{model} = $1; | |
279 | } | |
280 | ||
281 | $data->{wwn} = 'unknown'; | |
282 | if ($info =~ m/^E: ID_WWN=(.*)$/m) { | |
283 | $data->{wwn} = $1; | |
284 | } | |
285 | ||
286 | return $data; | |
287 | } | |
288 | ||
289 | sub get_sysdir_info { | |
290 | my ($sysdir) = @_; | |
291 | ||
292 | return undef if ! -d "$sysdir/device"; | |
293 | ||
294 | my $data = {}; | |
295 | ||
296 | my $size = file_read_firstline("$sysdir/size"); | |
297 | return undef if !$size; | |
298 | ||
299 | # linux always considers sectors to be 512 bytes, | |
300 | # independently of real block size | |
301 | $data->{size} = $size * 512; | |
302 | ||
303 | # dir/queue/rotational should be 1 for hdd, 0 for ssd | |
304 | $data->{rotational} = file_read_firstline("$sysdir/queue/rotational") // -1; | |
305 | ||
306 | $data->{vendor} = file_read_firstline("$sysdir/device/vendor") || 'unknown'; | |
307 | $data->{model} = file_read_firstline("$sysdir/device/model") || 'unknown'; | |
308 | ||
309 | return $data; | |
310 | } | |
311 | ||
312 | sub get_wear_leveling_info { | |
313 | my ($attributes, $model) = @_; | |
314 | ||
315 | my $wearout; | |
316 | ||
317 | my $vendormap = { | |
318 | 'kingston' => 231, | |
319 | 'samsung' => 177, | |
320 | 'intel' => 233, | |
321 | 'sandisk' => 233, | |
322 | 'crucial' => 202, | |
323 | 'default' => 233, | |
324 | }; | |
325 | ||
326 | # find target attr id | |
327 | ||
328 | my $attrid; | |
329 | ||
330 | foreach my $vendor (keys %$vendormap) { | |
331 | if ($model =~ m/$vendor/i) { | |
332 | $attrid = $vendormap->{$vendor}; | |
333 | # found the attribute | |
334 | last; | |
335 | } | |
336 | } | |
337 | ||
338 | if (!$attrid) { | |
339 | $attrid = $vendormap->{default}; | |
340 | } | |
341 | ||
342 | foreach my $attr (@$attributes) { | |
343 | next if $attr->{id} != $attrid; | |
344 | $wearout = $attr->{value}; | |
345 | last; | |
346 | } | |
347 | ||
348 | return $wearout; | |
349 | } | |
350 | ||
351 | sub dir_is_empty { | |
352 | my ($dir) = @_; | |
353 | ||
354 | my $dh = IO::Dir->new ($dir); | |
355 | return 1 if !$dh; | |
356 | ||
357 | while (defined(my $tmp = $dh->read)) { | |
358 | next if $tmp eq '.' || $tmp eq '..'; | |
359 | $dh->close; | |
360 | return 0; | |
361 | } | |
362 | $dh->close; | |
363 | return 1; | |
364 | } | |
365 | ||
366 | sub get_disks { | |
367 | my ($disk, $nosmart) = @_; | |
368 | my $disklist = {}; | |
369 | ||
370 | my $mounted = {}; | |
371 | ||
372 | my $mounts = PVE::ProcFSTools::parse_proc_mounts(); | |
373 | ||
374 | foreach my $mount (@$mounts) { | |
375 | next if $mount->[0] !~ m|^/dev/|; | |
376 | $mounted->{abs_path($mount->[0])} = $mount->[1]; | |
377 | }; | |
378 | ||
379 | my $dev_is_mounted = sub { | |
380 | my ($dev) = @_; | |
381 | return $mounted->{$dev}; | |
382 | }; | |
383 | ||
384 | my $journalhash = get_ceph_journals(); | |
385 | ||
386 | my $zfslist = get_zfs_devices(); | |
387 | ||
388 | my $lvmlist = get_lvm_devices(); | |
389 | ||
390 | # we get cciss/c0d0 but need cciss!c0d0 | |
391 | if (defined($disk) && $disk =~ m|^cciss/|) { | |
392 | $disk =~ s|cciss/|cciss!|; | |
393 | } | |
394 | ||
395 | dir_glob_foreach('/sys/block', '.*', sub { | |
396 | my ($dev) = @_; | |
397 | return if defined($disk) && $disk ne $dev; | |
398 | # whitelisting following devices | |
399 | # hdX: ide block device | |
400 | # sdX: sd block device | |
401 | # vdX: virtual block device | |
402 | # xvdX: xen virtual block device | |
403 | # nvmeXnY: nvme devices | |
404 | # cciss!cXnY: cciss devices | |
405 | return if $dev !~ m/^(h|s|x?v)d[a-z]+$/ && | |
406 | $dev !~ m/^nvme\d+n\d+$/ && | |
407 | $dev !~ m/^cciss\!c\d+d\d+$/; | |
408 | ||
409 | my $data = get_udev_info("/sys/block/$dev"); | |
410 | return if !defined($data); | |
411 | my $devpath = $data->{devpath}; | |
412 | ||
413 | my $sysdir = "/sys/block/$dev"; | |
414 | ||
415 | # we do not want iscsi devices | |
416 | return if -l $sysdir && readlink($sysdir) =~ m|host[^/]*/session[^/]*|; | |
417 | ||
418 | my $sysdata = get_sysdir_info($sysdir); | |
419 | return if !defined($sysdata); | |
420 | ||
421 | my $type = 'unknown'; | |
422 | ||
423 | if ($sysdata->{rotational} == 0) { | |
424 | $type = 'ssd'; | |
425 | $data->{rpm} = 0; | |
426 | } elsif ($sysdata->{rotational} == 1) { | |
427 | if ($data->{rpm} != -1) { | |
428 | $type = 'hdd'; | |
429 | } elsif ($data->{usb}) { | |
430 | $type = 'usb'; | |
431 | $data->{rpm} = 0; | |
432 | } | |
433 | } | |
434 | ||
435 | my $health = 'UNKNOWN'; | |
436 | my $wearout = 'N/A'; | |
437 | ||
438 | if (!$nosmart) { | |
439 | eval { | |
440 | my $smartdata = get_smart_data($devpath, ($type ne 'ssd')); | |
441 | $health = $smartdata->{health} if $smartdata->{health}; | |
442 | ||
443 | if ($type eq 'ssd') { | |
444 | # if we have an ssd we try to get the wearout indicator | |
445 | my $wearval = get_wear_leveling_info($smartdata->{attributes}, $data->{model} || $sysdir->{model}); | |
446 | $wearout = $wearval if $wearval; | |
447 | } | |
448 | }; | |
449 | } | |
450 | ||
451 | my $used; | |
452 | ||
453 | $used = 'LVM' if $lvmlist->{$devpath}; | |
454 | ||
455 | $used = 'mounted' if &$dev_is_mounted($devpath); | |
456 | ||
457 | $used = 'ZFS' if $zfslist->{$devpath}; | |
458 | ||
459 | # we replaced cciss/ with cciss! above | |
460 | # but in the result we need cciss/ again | |
461 | # because the caller might want to check the | |
462 | # result again with the original parameter | |
463 | if ($dev =~ m|^cciss!|) { | |
464 | $dev =~ s|^cciss!|cciss/|; | |
465 | } | |
466 | ||
467 | $disklist->{$dev} = { | |
468 | vendor => $sysdata->{vendor}, | |
469 | model => $data->{model} || $sysdata->{model}, | |
470 | size => $sysdata->{size}, | |
471 | serial => $data->{serial}, | |
472 | gpt => $data->{gpt}, | |
473 | rpm => $data->{rpm}, | |
474 | type => $type, | |
475 | wwn => $data->{wwn}, | |
476 | health => $health, | |
477 | devpath => $devpath, | |
478 | wearout => $wearout, | |
479 | }; | |
480 | ||
481 | my $osdid = -1; | |
482 | my $bluestore = 0; | |
483 | ||
484 | my $journal_count = 0; | |
485 | my $db_count = 0; | |
486 | my $wal_count = 0; | |
487 | ||
488 | my $found_partitions; | |
489 | my $found_lvm; | |
490 | my $found_mountpoints; | |
491 | my $found_zfs; | |
492 | my $found_dm; | |
493 | my $partpath = $devpath; | |
494 | ||
495 | # remove part after last / to | |
496 | # get the base path for the partitions | |
497 | # e.g. from /dev/cciss/c0d0 get /dev/cciss | |
498 | $partpath =~ s/\/[^\/]+$//; | |
499 | ||
500 | dir_glob_foreach("$sysdir", "$dev.+", sub { | |
501 | my ($part) = @_; | |
502 | ||
503 | $found_partitions = 1; | |
504 | ||
505 | if (my $mp = &$dev_is_mounted("$partpath/$part")) { | |
506 | $found_mountpoints = 1; | |
507 | if ($mp =~ m|^/var/lib/ceph/osd/ceph-(\d+)$|) { | |
508 | $osdid = $1; | |
509 | } | |
510 | } | |
511 | ||
512 | if ($lvmlist->{"$partpath/$part"}) { | |
513 | $found_lvm = 1; | |
514 | } | |
515 | ||
516 | if ($zfslist->{"$partpath/$part"}) { | |
517 | $found_zfs = 1; | |
518 | } | |
519 | ||
520 | if ($journalhash->{"$partpath/$part"}) { | |
521 | $journal_count++ if $journalhash->{"$partpath/$part"} == 1; | |
522 | $db_count++ if $journalhash->{"$partpath/$part"} == 2; | |
523 | $wal_count++ if $journalhash->{"$partpath/$part"} == 3; | |
524 | $bluestore = 1 if $journalhash->{"$partpath/$part"} == 4; | |
525 | } | |
526 | ||
527 | if (!dir_is_empty("$sysdir/$part/holders") && !$found_lvm) { | |
528 | $found_dm = 1; | |
529 | } | |
530 | }); | |
531 | ||
532 | $used = 'mounted' if $found_mountpoints && !$used; | |
533 | $used = 'LVM' if $found_lvm && !$used; | |
534 | $used = 'ZFS' if $found_zfs && !$used; | |
535 | $used = 'Device Mapper' if $found_dm && !$used; | |
536 | $used = 'partitions' if $found_partitions && !$used; | |
537 | ||
538 | # multipath, software raid, etc. | |
539 | # this check comes in last, to show more specific info | |
540 | # if we have it | |
541 | $used = 'Device Mapper' if !$used && !dir_is_empty("$sysdir/holders"); | |
542 | ||
543 | $disklist->{$dev}->{used} = $used if $used; | |
544 | $disklist->{$dev}->{osdid} = $osdid; | |
545 | $disklist->{$dev}->{journals} = $journal_count if $journal_count; | |
546 | $disklist->{$dev}->{bluestore} = $bluestore if $osdid != -1; | |
547 | $disklist->{$dev}->{db} = $db_count if $db_count; | |
548 | $disklist->{$dev}->{wal} = $wal_count if $wal_count; | |
549 | }); | |
550 | ||
551 | return $disklist; | |
552 | ||
553 | } | |
554 | ||
555 | sub get_partnum { | |
556 | my ($part_path) = @_; | |
557 | ||
558 | my ($mode, $rdev) = (stat($part_path))[2,6]; | |
559 | ||
560 | next if !$mode || !S_ISBLK($mode) || !$rdev; | |
561 | my $major = int($rdev / 0x100); | |
562 | my $minor = $rdev % 0x100; | |
563 | my $partnum_path = "/sys/dev/block/$major:$minor/"; | |
564 | ||
565 | my $partnum; | |
566 | ||
567 | $partnum = file_read_firstline("${partnum_path}partition"); | |
568 | ||
569 | die "Partition does not exists\n" if !defined($partnum); | |
570 | ||
571 | #untaint and ensure it is a int | |
572 | if ($partnum =~ m/(\d+)/) { | |
573 | $partnum = $1; | |
574 | die "Partition number $partnum is invalid\n" if $partnum > 128; | |
575 | } else { | |
576 | die "Failed to get partition number\n"; | |
577 | } | |
578 | ||
579 | return $partnum; | |
580 | } | |
581 | ||
582 | sub get_blockdev { | |
583 | my ($part_path) = @_; | |
584 | ||
585 | my $dev = $1 if $part_path =~ m|^/dev/(.*)$|; | |
586 | my $link = readlink "/sys/class/block/$dev"; | |
587 | my $block_dev = $1 if $link =~ m|([^/]*)/$dev$|; | |
588 | ||
589 | die "Can't parse parent device\n" if !defined($block_dev); | |
590 | die "No valid block device\n" if index($dev, $block_dev) == -1; | |
591 | ||
592 | $block_dev = "/dev/$block_dev"; | |
593 | die "Block device does not exsists\n" if !(-b $block_dev); | |
594 | ||
595 | return $block_dev; | |
596 | } | |
597 | ||
598 | 1; |