PVE/Diskmanage.pm

   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 use File::stat;
  10 use JSON;
  11
  12 use PVE::Tools qw(extract_param run_command file_get_contents file_read_firstline dir_glob_regex dir_glob_foreach trim);
  13
  14 my $SMARTCTL = "/usr/sbin/smartctl";
  15 my $ZPOOL = "/sbin/zpool";
  16 my $SGDISK = "/sbin/sgdisk";
  17 my $PVS = "/sbin/pvs";
  18 my $LVS = "/sbin/lvs";
  19 my $UDEVADM = "/bin/udevadm";
  20 my $LSBLK = "/bin/lsblk";
  21
  22 sub verify_blockdev_path {
  23     my ($rel_path) = @_;
  24
  25     die "missing path" if !$rel_path;
  26     my $path = abs_path($rel_path);
  27     die "failed to get absolute path to $rel_path\n" if !$path;
  28
  29     die "got unusual device path '$path'\n" if $path !~  m|^/dev/(.*)$|;
  30
  31     $path = "/dev/$1"; # untaint
  32
  33     assert_blockdev($path);
  34
  35     return $path;
  36 }
  37
  38 sub assert_blockdev {
  39     my ($dev, $noerr) = @_;
  40
  41     if ($dev !~ m|^/dev/| || !(-b $dev)) {
  42         return undef if $noerr;
  43         die "not a valid block device\n";
  44     }
  45
  46     return 1;
  47 }
  48
  49 sub init_disk {
  50     my ($disk, $uuid) = @_;
  51
  52     assert_blockdev($disk);
  53
  54     # we should already have checked if it is in use in the api call
  55     # but we check again for safety
  56     die "disk $disk is already in use\n" if disk_is_used($disk);
  57
  58     my $id = $uuid || 'R';
  59     run_command([$SGDISK, $disk, '-U', $id]);
  60     return 1;
  61 }
  62
  63 sub disk_is_used {
  64     my ($disk) = @_;
  65
  66     my $dev = $disk;
  67     $dev =~ s|^/dev/||;
  68
  69     my $disklist = get_disks($dev, 1);
  70
  71     die "'$disk' is not a valid local disk\n" if !defined($disklist->{$dev});
  72     return 1 if $disklist->{$dev}->{used};
  73
  74     return 0;
  75 }
  76
  77 sub get_smart_data {
  78     my ($disk, $healthonly) = @_;
  79
  80     assert_blockdev($disk);
  81     my $smartdata = {};
  82     my $type;
  83
  84     my $returncode = 0;
  85
  86     if ($disk =~ m!^/dev/(nvme\d+n\d+)$!) {
  87         my $info = get_sysdir_info("/sys/block/$1");
  88         $disk = "/dev/".($info->{device}
  89             or die "failed to get nvme controller device for $disk\n");
  90     }
  91
  92     my $cmd = [$SMARTCTL, '-H'];
  93     push @$cmd, '-A', '-f', 'brief' if !$healthonly;
  94     push @$cmd, $disk;
  95
  96     eval {
  97         $returncode = run_command($cmd, noerr => 1, outfunc => sub{
  98             my ($line) = @_;
  99
 100 # ATA SMART attributes, e.g.:
 101 # ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
 102 #   1 Raw_Read_Error_Rate     POSR-K   100   100   000    -    0
 103 #
 104 # SAS and NVME disks, e.g.:
 105 # Data Units Written:                 5,584,952 [2.85 TB]
 106 # Accumulated start-stop cycles:  34
 107
 108             if (defined($type) && $type eq 'ata' && $line =~ m/^([ \d]{2}\d)\s+(\S+)\s+(\S{6})\s+(\d+)\s+(\d+)\s+(\S+)\s+(\S+)\s+(.*)$/) {
 109                 my $entry = {};
 110
 111
 112                 $entry->{name} = $2 if defined $2;
 113                 $entry->{flags} = $3 if defined $3;
 114                 # the +0 makes a number out of the strings
 115                 $entry->{value} = $4+0 if defined $4;
 116                 $entry->{worst} = $5+0 if defined $5;
 117                 # some disks report the default threshold as --- instead of 000
 118                 if (defined($6) && $6 eq '---') {
 119                     $entry->{threshold} = 0;
 120                 } else {
 121                     $entry->{threshold} = $6+0 if defined $6;
 122                 }
 123                 $entry->{fail} = $7 if defined $7;
 124                 $entry->{raw} = $8 if defined $8;
 125                 $entry->{id} = $1 if defined $1;
 126                 push @{$smartdata->{attributes}}, $entry;
 127             } elsif ($line =~ m/(?:Health Status|self\-assessment test result): (.*)$/ ) {
 128                 $smartdata->{health} = $1;
 129             } elsif ($line =~ m/Vendor Specific SMART Attributes with Thresholds:/) {
 130                 $type = 'ata';
 131                 delete $smartdata->{text};
 132             } elsif ($line =~ m/=== START OF (READ )?SMART DATA SECTION ===/) {
 133                 $type = 'text';
 134             } elsif (defined($type) && $type eq 'text') {
 135                 $smartdata->{text} = '' if !defined $smartdata->{text};
 136                 $smartdata->{text} .= "$line\n";
 137                 # extract wearout from nvme text, allow for decimal values
 138                 if ($line =~ m/Percentage Used:\s*(\d+(?:\.\d+)?)\%/i) {
 139                     $smartdata->{wearout} = 100 - $1;
 140                 }
 141             } elsif ($line =~ m/SMART Disabled/) {
 142                 $smartdata->{health} = "SMART Disabled";
 143             }
 144         });
 145     };
 146     my $err = $@;
 147
 148     # bit 0 and 1 mark an severe smartctl error
 149     # all others are for disk status, so ignore them
 150     # see smartctl(8)
 151     if ((defined($returncode) && ($returncode & 0b00000011)) || $err) {
 152         die "Error getting S.M.A.R.T. data: Exit code: $returncode\n";
 153     }
 154
 155     $smartdata->{type} = $type;
 156
 157     return $smartdata;
 158 }
 159
 160 sub get_parttype_info() {
 161     my $cmd = [$LSBLK, '--json', '-o', 'path,parttype'];
 162     my $output = "";
 163     my $res = {};
 164     eval {
 165         run_command($cmd, outfunc => sub {
 166             my ($line) = @_;
 167             $output .= "$line\n";
 168         });
 169     };
 170     warn "$@\n" if $@;
 171     return $res if $output eq '';
 172
 173     my $parsed = eval { decode_json($output) };
 174     warn "$@\n" if $@;
 175     my $list = $parsed->{blockdevices} // [];
 176
 177     foreach my $dev (@$list) {
 178         next if !($dev->{parttype});
 179         my $type = $dev->{parttype};
 180         $res->{$type} = [] if !defined($res->{$type});
 181         push @{$res->{$type}}, $dev->{path};
 182     }
 183
 184     return $res;
 185 }
 186
 187 my $get_devices_by_partuuid = sub {
 188     my ($parttype_map, $uuids, $res) = @_;
 189
 190     $res = {} if !defined($res);
 191
 192     foreach my $uuid (sort keys %$uuids) {
 193        map { $res->{$_} = $uuids->{$uuid} } @{$parttype_map->{$uuid}};
 194     }
 195
 196     return $res;
 197 };
 198
 199 sub get_zfs_devices {
 200     my ($parttype_map) = @_;
 201     my $res = {};
 202
 203     return {} if ! -x $ZPOOL;
 204
 205     # use zpool and parttype uuid,
 206     # because log and cache do not have
 207     # zfs type uuid
 208     eval {
 209         run_command([$ZPOOL, 'list', '-HPLv'], outfunc => sub {
 210              my ($line) = @_;
 211
 212              if ($line =~ m|^\t([^\t]+)\t|) {
 213                 $res->{$1} = 1;
 214              }
 215         });
 216     };
 217
 218     # only warn here,
 219     # because maybe zfs tools are not installed
 220     warn "$@\n" if $@;
 221
 222     my $uuids = {
 223         "6a898cc3-1dd2-11b2-99a6-080020736631" => 1, # apple
 224         "516e7cba-6ecf-11d6-8ff8-00022d09712b" => 1, # bsd
 225     };
 226
 227
 228     $res = $get_devices_by_partuuid->($parttype_map, $uuids, $res);
 229
 230     return $res;
 231 }
 232
 233 sub get_lvm_devices {
 234     my ($parttype_map) = @_;
 235     my $res = {};
 236     eval {
 237         run_command([$PVS, '--noheadings', '--readonly', '-o', 'pv_name'], outfunc => sub{
 238             my ($line) = @_;
 239             $line = trim($line);
 240             if ($line =~ m|^/dev/|) {
 241                 $res->{$line} = 1;
 242             }
 243         });
 244     };
 245
 246     # if something goes wrong, we do not want
 247     # to give up, but indicate an error has occured
 248     warn "$@\n" if $@;
 249
 250     my $uuids = {
 251         "e6d6d379-f507-44c2-a23c-238f2a3df928" => 1,
 252     };
 253
 254     $res = $get_devices_by_partuuid->($parttype_map, $uuids, $res);
 255
 256     return $res;
 257 }
 258
 259 sub get_ceph_journals {
 260     my ($parttype_map) = @_;
 261     my $res = {};
 262
 263     my $uuids = {
 264         '45b0969e-9b03-4f30-b4c6-b4b80ceff106' => 1, # journal
 265         '30cd0809-c2b2-499c-8879-2d6b78529876' => 2, # db
 266         '5ce17fce-4087-4169-b7ff-056cc58473f9' => 3, # wal
 267         'cafecafe-9b03-4f30-b4c6-b4b80ceff106' => 4, # block
 268     };
 269
 270     $res = $get_devices_by_partuuid->($parttype_map, $uuids, $res);
 271
 272     return $res;
 273 }
 274
 275 # reads the lv_tags and matches them with the devices
 276 sub get_ceph_volume_infos {
 277     my $result = {};
 278
 279     my $cmd = [ $LVS, '-S', 'lv_name=~^osd-', '-o', 'devices,lv_name,lv_tags',
 280                '--noheadings', '--readonly', '--separator', ';' ];
 281
 282     run_command($cmd, outfunc => sub {
 283         my $line = shift;
 284         $line =~ s/(?:^\s+)|(?:\s+$)//g; # trim whitespaces
 285
 286         my $fields = [ split(';', $line) ];
 287
 288         # lvs syntax is /dev/sdX(Y) where Y is the start (which we do not need)
 289         my ($dev) = $fields->[0] =~ m|^(/dev/[a-z]+)|;
 290         if ($fields->[1] =~ m|^osd-([^-]+)-|) {
 291             my $type = $1;
 292             # $result autovivification is wanted, to not creating empty hashes
 293             if (($type eq 'block' || $type eq 'data') && $fields->[2] =~ m/ceph.osd_id=([^,]+)/) {
 294                 $result->{$dev}->{osdid} = $1;
 295                 $result->{$dev}->{bluestore} = ($type eq 'block');
 296                 if ($fields->[2] =~ m/ceph\.encrypted=1/) {
 297                     $result->{$dev}->{encrypted} = 1;
 298                 }
 299             } else {
 300                 # undef++ becomes '1' (see `perldoc perlop`: Auto-increment)
 301                 $result->{$dev}->{$type}++;
 302             }
 303         }
 304     });
 305
 306     return $result;
 307 }
 308
 309 sub get_udev_info {
 310     my ($dev) = @_;
 311
 312     my $info = "";
 313     my $data = {};
 314     eval {
 315         run_command([$UDEVADM, 'info', '-p', $dev, '--query', 'all'], outfunc => sub {
 316             my ($line) = @_;
 317             $info .= "$line\n";
 318         });
 319     };
 320     warn $@ if $@;
 321     return undef if !$info;
 322
 323     return undef if $info !~ m/^E: DEVTYPE=disk$/m;
 324     return undef if $info =~ m/^E: ID_CDROM/m;
 325
 326     # we use this, because some disks are not simply in /dev
 327     # e.g. /dev/cciss/c0d0
 328     if ($info =~ m/^E: DEVNAME=(\S+)$/m) {
 329         $data->{devpath} = $1;
 330     }
 331     return if !defined($data->{devpath});
 332
 333     $data->{serial} = 'unknown';
 334     if ($info =~ m/^E: ID_SERIAL_SHORT=(\S+)$/m) {
 335         $data->{serial} = $1;
 336     }
 337
 338     $data->{gpt} = 0;
 339     if ($info =~ m/^E: ID_PART_TABLE_TYPE=gpt$/m) {
 340         $data->{gpt} = 1;
 341     }
 342
 343     # detect SSD
 344     $data->{rpm} = -1;
 345     if ($info =~ m/^E: ID_ATA_ROTATION_RATE_RPM=(\d+)$/m) {
 346         $data->{rpm} = $1;
 347     }
 348
 349     if ($info =~ m/^E: ID_BUS=usb$/m) {
 350         $data->{usb} = 1;
 351     }
 352
 353     if ($info =~ m/^E: ID_MODEL=(.+)$/m) {
 354         $data->{model} = $1;
 355     }
 356
 357     $data->{wwn} = 'unknown';
 358     if ($info =~ m/^E: ID_WWN=(.*)$/m) {
 359         $data->{wwn} = $1;
 360     }
 361
 362     if ($info =~ m/^E: DEVLINKS=(.+)$/m) {
 363         my @devlinks = grep(m#^/dev/disk/by-id/(ata|scsi|nvme(?!-eui))#, split (/ /, $1));
 364         $data->{by_id_link} = $devlinks[0] if defined($devlinks[0]);
 365     }
 366
 367     return $data;
 368 }
 369
 370 sub get_sysdir_info {
 371     my ($sysdir) = @_;
 372
 373     return undef if ! -d "$sysdir/device";
 374
 375     my $data = {};
 376
 377     my $size = file_read_firstline("$sysdir/size");
 378     return undef if !$size;
 379
 380     # linux always considers sectors to be 512 bytes,
 381     # independently of real block size
 382     $data->{size} = $size * 512;
 383
 384     # dir/queue/rotational should be 1 for hdd, 0 for ssd
 385     $data->{rotational} = file_read_firstline("$sysdir/queue/rotational") // -1;
 386
 387     $data->{vendor} = file_read_firstline("$sysdir/device/vendor") || 'unknown';
 388     $data->{model} = file_read_firstline("$sysdir/device/model") || 'unknown';
 389
 390     if (defined(my $device = readlink("$sysdir/device"))) {
 391         # strip directory and untaint:
 392         ($data->{device}) = $device =~ m!([^/]+)$!;
 393     }
 394
 395     return $data;
 396 }
 397
 398 sub get_wear_leveling_info {
 399     my ($smartdata, $model) = @_;
 400     my $attributes = $smartdata->{attributes};
 401
 402     if (defined($smartdata->{wearout})) {
 403         return $smartdata->{wearout};
 404     }
 405
 406     my $wearout;
 407
 408     my $vendormap = {
 409         'kingston' => 231,
 410         'samsung' => 177,
 411         'intel' => 233,
 412         'sandisk' => 233,
 413         'crucial' => 202,
 414         'default' => 233,
 415     };
 416
 417     # find target attr id
 418
 419     my $attrid;
 420
 421     foreach my $vendor (keys %$vendormap) {
 422         if ($model =~ m/$vendor/i) {
 423             $attrid = $vendormap->{$vendor};
 424             # found the attribute
 425             last;
 426         }
 427     }
 428
 429     if (!$attrid) {
 430         $attrid = $vendormap->{default};
 431     }
 432
 433     foreach my $attr (@$attributes) {
 434         next if $attr->{id} != $attrid;
 435         $wearout = $attr->{value};
 436         last;
 437     }
 438
 439     return $wearout;
 440 }
 441
 442 sub dir_is_empty {
 443     my ($dir) = @_;
 444
 445     my $dh = IO::Dir->new ($dir);
 446     return 1 if !$dh;
 447
 448     while (defined(my $tmp = $dh->read)) {
 449         next if $tmp eq '.' || $tmp eq '..';
 450         $dh->close;
 451         return 0;
 452     }
 453     $dh->close;
 454     return 1;
 455 }
 456
 457 sub is_iscsi {
 458     my ($sysdir) = @_;
 459
 460     if (-l $sysdir && readlink($sysdir) =~ m|host[^/]*/session[^/]*|) {
 461         return 1;
 462     }
 463
 464     return 0;
 465 }
 466
 467 sub get_disks {
 468     my ($disks, $nosmart) = @_;
 469     my $disklist = {};
 470
 471     my $mounted = {};
 472
 473     my $mounts = PVE::ProcFSTools::parse_proc_mounts();
 474
 475     foreach my $mount (@$mounts) {
 476         next if $mount->[0] !~ m|^/dev/|;
 477         $mounted->{abs_path($mount->[0])} = $mount->[1];
 478     };
 479
 480     my $dev_is_mounted = sub {
 481         my ($dev) = @_;
 482         return $mounted->{$dev};
 483     };
 484
 485     my $parttype_map = get_parttype_info();
 486
 487     my $journalhash = get_ceph_journals($parttype_map);
 488     my $ceph_volume_infos = get_ceph_volume_infos();
 489
 490     my $zfshash = get_zfs_devices($parttype_map);
 491
 492     my $lvmhash = get_lvm_devices($parttype_map);
 493
 494     my $disk_regex = ".*";
 495     if (defined($disks)) {
 496         if (!ref($disks)) {
 497             $disks = [ $disks ];
 498         } elsif (ref($disks) ne 'ARRAY') {
 499             die "disks is not a string or array reference\n";
 500         }
 501         # we get cciss/c0d0 but need cciss!c0d0
 502         map { s|cciss/|cciss!| } @$disks;
 503
 504         $disk_regex = "(?:" . join('|', @$disks) . ")";
 505     }
 506
 507     dir_glob_foreach('/sys/block', $disk_regex, sub {
 508         my ($dev) = @_;
 509         # whitelisting following devices
 510         # hdX: ide block device
 511         # sdX: sd block device
 512         # vdX: virtual block device
 513         # xvdX: xen virtual block device
 514         # nvmeXnY: nvme devices
 515         # cciss!cXnY: cciss devices
 516         return if $dev !~ m/^(h|s|x?v)d[a-z]+$/ &&
 517                   $dev !~ m/^nvme\d+n\d+$/ &&
 518                   $dev !~ m/^cciss\!c\d+d\d+$/;
 519
 520         my $data = get_udev_info("/sys/block/$dev");
 521         return if !defined($data);
 522         my $devpath = $data->{devpath};
 523
 524         my $sysdir = "/sys/block/$dev";
 525
 526         # we do not want iscsi devices
 527         return if is_iscsi($sysdir);
 528
 529         my $sysdata = get_sysdir_info($sysdir);
 530         return if !defined($sysdata);
 531
 532         my $type = 'unknown';
 533
 534         if ($sysdata->{rotational} == 0) {
 535             $type = 'ssd';
 536             $data->{rpm} = 0;
 537         } elsif ($sysdata->{rotational} == 1) {
 538             if ($data->{rpm} != -1) {
 539                 $type = 'hdd';
 540             } elsif ($data->{usb}) {
 541                 $type = 'usb';
 542                 $data->{rpm} = 0;
 543             }
 544         }
 545
 546         my $health = 'UNKNOWN';
 547         my $wearout = 'N/A';
 548
 549         if (!$nosmart) {
 550             eval {
 551                 my $smartdata = get_smart_data($devpath, ($type ne 'ssd'));
 552                 $health = $smartdata->{health} if $smartdata->{health};
 553
 554                 if ($type eq 'ssd') {
 555                     # if we have an ssd we try to get the wearout indicator
 556                     my $wearval = get_wear_leveling_info($smartdata, $data->{model} || $sysdata->{model});
 557                     $wearout = $wearval if defined($wearval);
 558                 }
 559             };
 560         }
 561
 562         my $used;
 563
 564         $used = 'LVM' if $lvmhash->{$devpath};
 565
 566         $used = 'mounted' if &$dev_is_mounted($devpath);
 567
 568         $used = 'ZFS' if $zfshash->{$devpath};
 569
 570         # we replaced cciss/ with cciss! above
 571         # but in the result we need cciss/ again
 572         # because the caller might want to check the
 573         # result again with the original parameter
 574         if ($dev =~ m|^cciss!|) {
 575             $dev =~ s|^cciss!|cciss/|;
 576         }
 577
 578         $disklist->{$dev} = {
 579             vendor => $sysdata->{vendor},
 580             model => $data->{model} || $sysdata->{model},
 581             size => $sysdata->{size},
 582             serial => $data->{serial},
 583             gpt => $data->{gpt},
 584             rpm => $data->{rpm},
 585             type =>  $type,
 586             wwn => $data->{wwn},
 587             health => $health,
 588             devpath => $devpath,
 589             wearout => $wearout,
 590         };
 591
 592         my $by_id_link = $data->{by_id_link};
 593         $disklist->{$dev}->{by_id_link} = $by_id_link if defined($by_id_link);
 594
 595         my $osdid = -1;
 596         my $bluestore = 0;
 597         my $osdencrypted = 0;
 598
 599         my $journal_count = 0;
 600         my $db_count = 0;
 601         my $wal_count = 0;
 602
 603         my $found_partitions;
 604         my $found_lvm;
 605         my $found_mountpoints;
 606         my $found_zfs;
 607         my $found_dm;
 608         my $partpath = $devpath;
 609
 610         # remove part after last / to
 611         # get the base path for the partitions
 612         # e.g. from /dev/cciss/c0d0 get /dev/cciss
 613         $partpath =~ s/\/[^\/]+$//;
 614
 615         dir_glob_foreach("$sysdir", "$dev.+", sub {
 616             my ($part) = @_;
 617
 618             $found_partitions = 1;
 619
 620             if (my $mp = &$dev_is_mounted("$partpath/$part")) {
 621                 $found_mountpoints = 1;
 622                 if ($mp =~ m|^/var/lib/ceph/osd/ceph-(\d+)$|) {
 623                     $osdid = $1;
 624                 }
 625             }
 626
 627             if ($lvmhash->{"$partpath/$part"}) {
 628                 $found_lvm = 1;
 629             }
 630
 631             if ($zfshash->{"$partpath/$part"}) {
 632                 $found_zfs = 1;
 633             }
 634
 635             if (my $journal_part = $journalhash->{"$partpath/$part"}) {
 636                 $journal_count++ if $journal_part == 1;
 637                 $db_count++ if $journal_part == 2;
 638                 $wal_count++ if $journal_part == 3;
 639                 $bluestore = 1 if $journal_part == 4;
 640             }
 641
 642             if (!dir_is_empty("$sysdir/$part/holders") && !$found_lvm)  {
 643                 $found_dm = 1;
 644             }
 645         });
 646
 647         if (my $ceph_volume = $ceph_volume_infos->{$devpath}) {
 648             $journal_count += $ceph_volume->{journal} // 0;
 649             $db_count += $ceph_volume->{db} // 0;
 650             $wal_count += $ceph_volume->{wal} // 0;
 651             if (defined($ceph_volume->{osdid})) {
 652                 $osdid = $ceph_volume->{osdid};
 653                 $bluestore = 1 if $ceph_volume->{bluestore};
 654                 $osdencrypted = 1 if $ceph_volume->{encrypted};
 655             }
 656         }
 657
 658         $used = 'mounted' if $found_mountpoints && !$used;
 659         $used = 'LVM' if $found_lvm && !$used;
 660         $used = 'ZFS' if $found_zfs && !$used;
 661         $used = 'Device Mapper' if $found_dm && !$used;
 662         $used = 'partitions' if $found_partitions && !$used;
 663
 664         # multipath, software raid, etc.
 665         # this check comes in last, to show more specific info
 666         # if we have it
 667         $used = 'Device Mapper' if !$used && !dir_is_empty("$sysdir/holders");
 668
 669         $disklist->{$dev}->{used} = $used if $used;
 670         $disklist->{$dev}->{osdid} = $osdid;
 671         $disklist->{$dev}->{journals} = $journal_count if $journal_count;
 672         $disklist->{$dev}->{bluestore} = $bluestore if $osdid != -1;
 673         $disklist->{$dev}->{osdencrypted} = $osdencrypted if $osdid != -1;
 674         $disklist->{$dev}->{db} = $db_count if $db_count;
 675         $disklist->{$dev}->{wal} = $wal_count if $wal_count;
 676     });
 677
 678     return $disklist;
 679
 680 }
 681
 682 sub get_partnum {
 683     my ($part_path) = @_;
 684
 685     my $st = stat($part_path);
 686
 687     next if !$st->mode || !S_ISBLK($st->mode) || !$st->rdev;
 688     my $major = PVE::Tools::dev_t_major($st->rdev);
 689     my $minor = PVE::Tools::dev_t_minor($st->rdev);
 690     my $partnum_path = "/sys/dev/block/$major:$minor/";
 691
 692     my $partnum;
 693
 694     $partnum = file_read_firstline("${partnum_path}partition");
 695
 696     die "Partition does not exist\n" if !defined($partnum);
 697
 698     #untaint and ensure it is a int
 699     if ($partnum =~ m/(\d+)/) {
 700         $partnum = $1;
 701         die "Partition number $partnum is invalid\n" if $partnum > 128;
 702     } else {
 703         die "Failed to get partition number\n";
 704     }
 705
 706     return $partnum;
 707 }
 708
 709 sub get_blockdev {
 710     my ($part_path) = @_;
 711
 712     my $dev = $1 if $part_path =~ m|^/dev/(.*)$|;
 713     my $link = readlink "/sys/class/block/$dev";
 714     my $block_dev = $1 if $link =~ m|([^/]*)/$dev$|;
 715
 716     die "Can't parse parent device\n" if !defined($block_dev);
 717     die "No valid block device\n" if index($dev, $block_dev) == -1;
 718
 719     $block_dev = "/dev/$block_dev";
 720     die "Block device does not exsists\n" if !(-b $block_dev);
 721
 722     return $block_dev;
 723 }
 724
 725 sub locked_disk_action {
 726     my ($sub) = @_;
 727     my $res = PVE::Tools::lock_file('/run/lock/pve-diskmanage.lck', undef, $sub);
 728     die $@ if $@;
 729     return $res;
 730 }
 731
 732 sub assert_disk_unused {
 733     my ($dev) = @_;
 734
 735     die "device '$dev' is already in use\n" if disk_is_used($dev);
 736
 737     return undef;
 738 }
 739
 740 sub append_partition {
 741     my ($dev, $size) = @_;
 742
 743     my $devname = $dev;
 744     $devname =~ s|^/dev/||;
 745
 746     my $newpartid = 1;
 747     dir_glob_foreach("/sys/block/$devname", qr/\Q$devname\E.*?(\d+)/, sub {
 748         my ($part, $partid) = @_;
 749
 750         if ($partid >= $newpartid) {
 751             $newpartid = $partid + 1;
 752         }
 753     });
 754
 755     $size = PVE::Tools::convert_size($size, 'b' => 'mb');
 756
 757     run_command([ $SGDISK, '-n', "$newpartid:0:+${size}M", $dev ],
 758                 errmsg => "error creating partition '$newpartid' on '$dev'");
 759
 760     my $partition;
 761
 762     # loop again to detect the real partiton device which does not always follow
 763     # a strict $devname$partition scheme like /dev/nvme0n1 -> /dev/nvme0n1p1
 764     dir_glob_foreach("/sys/block/$devname", qr/\Q$devname\E.*$newpartid/, sub {
 765         my ($part) = @_;
 766
 767         $partition = "/dev/$part";
 768     });
 769
 770     return $partition;
 771 }
 772
 773 1;