PVE/Storage/RBDPlugin.pm

   1 package PVE::Storage::RBDPlugin;
   2
   3 use strict;
   4 use warnings;
   5
   6 use IO::File;
   7 use JSON;
   8 use Net::IP;
   9
  10 use PVE::CephConfig;
  11 use PVE::JSONSchema qw(get_standard_option);
  12 use PVE::ProcFSTools;
  13 use PVE::RADOS;
  14 use PVE::Storage::Plugin;
  15 use PVE::Tools qw(run_command trim);
  16
  17 use base qw(PVE::Storage::Plugin);
  18
  19 my $get_parent_image_name = sub {
  20     my ($parent) = @_;
  21     return undef if !$parent;
  22     return $parent->{image} . "@" . $parent->{snapshot};
  23 };
  24
  25 my sub get_rbd_path {
  26     my ($scfg, $volume) = @_;
  27     my $path = $scfg->{pool} ? $scfg->{pool} : 'rbd';
  28     $path .= "/$scfg->{namespace}" if defined($scfg->{namespace});
  29     $path .= "/$volume" if defined($volume);
  30     return $path;
  31 };
  32
  33 my $build_cmd = sub {
  34     my ($binary, $scfg, $storeid, $op, @options) = @_;
  35
  36     my $cmd_option = PVE::CephConfig::ceph_connect_option($scfg, $storeid);
  37     my $pool =  $scfg->{pool} ? $scfg->{pool} : 'rbd';
  38
  39     my $cmd = [$binary, '-p', $pool];
  40
  41     if (defined(my $namespace = $scfg->{namespace})) {
  42         # some subcommands will fail if the --namespace parameter is present
  43         my $no_namespace_parameter = {
  44             unmap => 1,
  45         };
  46         push @$cmd, '--namespace', "$namespace" if !$no_namespace_parameter->{$op};
  47     }
  48     push @$cmd, '-c', $cmd_option->{ceph_conf} if ($cmd_option->{ceph_conf});
  49     push @$cmd, '-m', $cmd_option->{mon_host} if ($cmd_option->{mon_host});
  50     push @$cmd, '--auth_supported', $cmd_option->{auth_supported} if ($cmd_option->{auth_supported});
  51     push @$cmd, '-n', "client.$cmd_option->{userid}" if ($cmd_option->{userid});
  52     push @$cmd, '--keyring', $cmd_option->{keyring} if ($cmd_option->{keyring});
  53
  54     push @$cmd, $op;
  55
  56     push @$cmd, @options if scalar(@options);
  57
  58     return $cmd;
  59 };
  60
  61 my $rbd_cmd = sub {
  62     my ($scfg, $storeid, $op, @options) = @_;
  63
  64     return $build_cmd->('/usr/bin/rbd', $scfg, $storeid, $op, @options);
  65 };
  66
  67 my $rados_cmd = sub {
  68     my ($scfg, $storeid, $op, @options) = @_;
  69
  70     return $build_cmd->('/usr/bin/rados', $scfg, $storeid, $op, @options);
  71 };
  72
  73 my $librados_connect = sub {
  74     my ($scfg, $storeid, $options) = @_;
  75
  76     my $librados_config = PVE::CephConfig::ceph_connect_option($scfg, $storeid);
  77
  78     my $rados = PVE::RADOS->new(%$librados_config);
  79
  80     return $rados;
  81 };
  82
  83 # needed for volumes created using ceph jewel (or higher)
  84 my $krbd_feature_update = sub {
  85     my ($scfg, $storeid, $name) = @_;
  86
  87     my (@disable, @enable);
  88     my ($kmajor, $kminor) = PVE::ProcFSTools::kernel_version();
  89
  90     if ($kmajor > 5 || $kmajor == 5 && $kminor >= 3) {
  91         # 'deep-flatten' can only be disabled, not enabled after image creation
  92         push @enable, 'fast-diff', 'object-map';
  93     } else {
  94         push @disable, 'fast-diff', 'object-map', 'deep-flatten';
  95     }
  96
  97     if ($kmajor >= 5) {
  98         push @enable, 'exclusive-lock';
  99     } else {
 100         push @disable, 'exclusive-lock';
 101     }
 102
 103     my $active_features_list = (rbd_volume_info($scfg, $storeid, $name))[4];
 104     my $active_features = { map { $_ => 1 } @$active_features_list };
 105
 106     my $to_disable = join(',', grep {  $active_features->{$_} } @disable);
 107     my $to_enable  = join(',', grep { !$active_features->{$_} } @enable );
 108
 109     if ($to_disable) {
 110         print "disable RBD image features this kernel RBD drivers is not compatible with: $to_disable\n";
 111         my $cmd = $rbd_cmd->($scfg, $storeid, 'feature', 'disable', $name, $to_disable);
 112         run_rbd_command(
 113             $cmd,
 114             errmsg => "could not disable krbd-incompatible image features '$to_disable' for rbd image: $name",
 115         );
 116     }
 117     if ($to_enable) {
 118         print "enable RBD image features this kernel RBD drivers supports: $to_enable\n";
 119         eval {
 120             my $cmd = $rbd_cmd->($scfg, $storeid, 'feature', 'enable', $name, $to_enable);
 121             run_rbd_command(
 122                 $cmd,
 123                 errmsg => "could not enable krbd-compatible image features '$to_enable' for rbd image: $name",
 124             );
 125         };
 126         warn "$@" if $@;
 127     }
 128 };
 129
 130 sub run_rbd_command {
 131     my ($cmd, %args) = @_;
 132
 133     my $lasterr;
 134     my $errmsg = $args{errmsg} . ": " || "";
 135     if (!exists($args{errfunc})) {
 136         # ' error: 2014-02-06 11:51:59.839135 7f09f94d0760 -1 librbd: snap_unprotect: can't unprotect;
 137         # at least 1 child(ren) in pool cephstor1
 138         $args{errfunc} = sub {
 139             my $line = shift;
 140             if ($line =~ m/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+ [0-9a-f]+ [\-\d]+ librbd: (.*)$/) {
 141                 $lasterr = "$1\n";
 142             } else {
 143                 $lasterr = $line;
 144             }
 145             print STDERR $lasterr;
 146             *STDERR->flush();
 147         };
 148     }
 149
 150     eval { run_command($cmd, %args); };
 151     if (my $err = $@) {
 152         die $errmsg . $lasterr if length($lasterr);
 153         die $err;
 154     }
 155
 156     return undef;
 157 }
 158
 159 sub rbd_ls {
 160     my ($scfg, $storeid) = @_;
 161
 162     my $pool =  $scfg->{pool} ? $scfg->{pool} : 'rbd';
 163     $pool .= "/$scfg->{namespace}" if defined($scfg->{namespace});
 164
 165     my $raw = '';
 166     my $parser = sub { $raw .= shift };
 167
 168     my $cmd = $rbd_cmd->($scfg, $storeid, 'ls', '-l', '--format', 'json');
 169     eval {
 170         run_rbd_command($cmd, errmsg => "rbd error", errfunc => sub {}, outfunc => $parser);
 171     };
 172     my $err = $@;
 173
 174     die $err if $err && $err !~ m/doesn't contain rbd images/ ;
 175
 176     my $result;
 177     if ($raw eq '') {
 178         $result = [];
 179     } elsif ($raw =~ m/^(\[.*\])$/s) { # untaint
 180         $result = JSON::decode_json($1);
 181     } else {
 182         die "got unexpected data from rbd ls: '$raw'\n";
 183     }
 184
 185     my $list = {};
 186
 187     foreach my $el (@$result) {
 188         next if defined($el->{snapshot});
 189
 190         my $image = $el->{image};
 191
 192         my ($owner) = $image =~ m/^(?:vm|base)-(\d+)-/;
 193         next if !defined($owner);
 194
 195         $list->{$pool}->{$image} = {
 196             name => $image,
 197             size => $el->{size},
 198             parent => $get_parent_image_name->($el->{parent}),
 199             vmid => $owner
 200         };
 201     }
 202
 203     return $list;
 204 }
 205
 206 sub rbd_ls_snap {
 207     my ($scfg, $storeid, $name) = @_;
 208
 209     my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'ls', $name, '--format', 'json');
 210
 211     my $raw = '';
 212     run_rbd_command($cmd, errmsg => "rbd error", errfunc => sub {}, outfunc => sub { $raw .= shift; });
 213
 214     my $list;
 215     if ($raw =~ m/^(\[.*\])$/s) { # untaint
 216         $list = eval { JSON::decode_json($1) };
 217         die "invalid JSON output from 'rbd snap ls $name': $@\n" if $@;
 218     } else {
 219         die "got unexpected data from 'rbd snap ls $name': '$raw'\n";
 220     }
 221
 222     $list = [] if !defined($list);
 223
 224     my $res = {};
 225     foreach my $el (@$list) {
 226         my $snap = $el->{name};
 227         my $protected = defined($el->{protected}) && $el->{protected} eq "true" ? 1 : undef;
 228         $res->{$snap} = {
 229             name => $snap,
 230             id => $el->{id} // undef,
 231             size => $el->{size} // 0,
 232             protected => $protected,
 233         };
 234     }
 235     return $res;
 236 }
 237
 238 sub rbd_volume_info {
 239     my ($scfg, $storeid, $volname, $snap) = @_;
 240
 241     my $cmd = undef;
 242
 243     my @options = ('info', $volname, '--format', 'json');
 244     if ($snap) {
 245         push @options, '--snap', $snap;
 246     }
 247
 248     $cmd = $rbd_cmd->($scfg, $storeid, @options);
 249
 250     my $raw = '';
 251     my $parser = sub { $raw .= shift };
 252
 253     run_rbd_command($cmd, errmsg => "rbd error", errfunc => sub {}, outfunc => $parser);
 254
 255     my $volume;
 256     if ($raw eq '') {
 257         $volume = {};
 258     } elsif ($raw =~ m/^(\{.*\})$/s) { # untaint
 259         $volume = JSON::decode_json($1);
 260     } else {
 261         die "got unexpected data from rbd info: '$raw'\n";
 262     }
 263
 264     $volume->{parent} = $get_parent_image_name->($volume->{parent});
 265     $volume->{protected} = defined($volume->{protected}) && $volume->{protected} eq "true" ? 1 : undef;
 266
 267     return $volume->@{qw(size parent format protected features)};
 268 }
 269
 270 # Configuration
 271
 272 sub type {
 273     return 'rbd';
 274 }
 275
 276 sub plugindata {
 277     return {
 278         content => [ {images => 1, rootdir => 1}, { images => 1 }],
 279     };
 280 }
 281
 282 sub properties {
 283     return {
 284         monhost => {
 285             description => "IP addresses of monitors (for external clusters).",
 286             type => 'string', format => 'pve-storage-portal-dns-list',
 287         },
 288         pool => {
 289             description => "Pool.",
 290             type => 'string',
 291         },
 292         'data-pool' => {
 293             description => "Data Pool (for erasure coding only)",
 294             type => 'string',
 295         },
 296         namespace => {
 297             description => "RBD Namespace.",
 298             type => 'string',
 299         },
 300         username => {
 301             description => "RBD Id.",
 302             type => 'string',
 303         },
 304         authsupported => {
 305             description => "Authsupported.",
 306             type => 'string',
 307         },
 308         krbd => {
 309             description => "Always access rbd through krbd kernel module.",
 310             type => 'boolean',
 311         },
 312         keyring => {
 313             description => "Client keyring contents (for external clusters).",
 314             type => 'string',
 315         },
 316     };
 317 }
 318
 319 sub options {
 320     return {
 321         nodes => { optional => 1 },
 322         disable => { optional => 1 },
 323         monhost => { optional => 1},
 324         pool => { optional => 1 },
 325         'data-pool' => { optional => 1 },
 326         namespace => { optional => 1 },
 327         username => { optional => 1 },
 328         content => { optional => 1 },
 329         krbd => { optional => 1 },
 330         keyring => { optional => 1 },
 331         bwlimit => { optional => 1 },
 332     };
 333 }
 334
 335 # Storage implementation
 336
 337 sub on_add_hook {
 338     my ($class, $storeid, $scfg, %param) = @_;
 339
 340     my $secret = $param{keyring} if defined $param{keyring} // undef;
 341     PVE::CephConfig::ceph_create_keyfile($scfg->{type}, $storeid, $secret);
 342
 343     return;
 344 }
 345
 346 sub on_update_hook {
 347     my ($class, $storeid, $scfg, %param) = @_;
 348
 349     if (exists($param{keyring})) {
 350         if (defined($param{keyring})) {
 351             PVE::CephConfig::ceph_create_keyfile($scfg->{type}, $storeid, $param{keyring});
 352         } else {
 353             PVE::CephConfig::ceph_remove_keyfile($scfg->{type}, $storeid);
 354         }
 355     }
 356
 357     return;
 358 }
 359
 360 sub on_delete_hook {
 361     my ($class, $storeid, $scfg) = @_;
 362     PVE::CephConfig::ceph_remove_keyfile($scfg->{type}, $storeid);
 363     return;
 364 }
 365
 366 sub parse_volname {
 367     my ($class, $volname) = @_;
 368
 369     if ($volname =~ m/^((base-(\d+)-\S+)\/)?((base)?(vm)?-(\d+)-\S+)$/) {
 370         return ('images', $4, $7, $2, $3, $5, 'raw');
 371     }
 372
 373     die "unable to parse rbd volume name '$volname'\n";
 374 }
 375
 376 sub path {
 377     my ($class, $scfg, $volname, $storeid, $snapname) = @_;
 378
 379     my $cmd_option = PVE::CephConfig::ceph_connect_option($scfg, $storeid);
 380     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 381     $name .= '@'.$snapname if $snapname;
 382
 383     my $rbd_path = get_rbd_path($scfg, $name);
 384     return ("/dev/rbd/${rbd_path}", $vmid, $vtype) if $scfg->{krbd};
 385
 386     my $path = "rbd:${rbd_path}";
 387
 388     $path .= ":conf=$cmd_option->{ceph_conf}" if $cmd_option->{ceph_conf};
 389     if (defined($scfg->{monhost})) {
 390         my $monhost = PVE::CephConfig::hostlist($scfg->{monhost}, ';');
 391         $monhost =~ s/:/\\:/g;
 392         $path .= ":mon_host=$monhost";
 393         $path .= ":auth_supported=$cmd_option->{auth_supported}";
 394     }
 395
 396     $path .= ":id=$cmd_option->{userid}:keyring=$cmd_option->{keyring}" if ($cmd_option->{keyring});
 397
 398     return ($path, $vmid, $vtype);
 399 }
 400
 401 sub find_free_diskname {
 402     my ($class, $storeid, $scfg, $vmid, $fmt, $add_fmt_suffix) = @_;
 403
 404     my $cmd = $rbd_cmd->($scfg, $storeid, 'ls');
 405
 406     my $disk_list = [];
 407
 408     my $parser = sub {
 409         my $line = shift;
 410         if ($line =~ m/^(.*)$/) { # untaint
 411             push @$disk_list, $1;
 412         }
 413     };
 414
 415     eval {
 416         run_rbd_command($cmd, errmsg => "rbd error", errfunc => sub {}, outfunc => $parser);
 417     };
 418     my $err = $@;
 419
 420     die $err if $err && $err !~ m/doesn't contain rbd images/;
 421
 422     return PVE::Storage::Plugin::get_next_vm_diskname($disk_list, $storeid, $vmid, undef, $scfg);
 423 }
 424
 425 sub create_base {
 426     my ($class, $storeid, $scfg, $volname) = @_;
 427
 428     my $snap = '__base__';
 429
 430     my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
 431         $class->parse_volname($volname);
 432
 433     die "create_base not possible with base image\n" if $isBase;
 434
 435     my ($size, $parent, $format, undef) = rbd_volume_info($scfg, $storeid, $name);
 436     die "rbd volume info on '$name' failed\n" if !($size);
 437
 438     die "rbd image must be at format V2" if $format ne "2";
 439
 440     die "volname '$volname' contains wrong information about parent $parent $basename\n"
 441         if $basename && (!$parent || $parent ne $basename."@".$snap);
 442
 443     my $newname = $name;
 444     $newname =~ s/^vm-/base-/;
 445
 446     my $newvolname = $basename ? "$basename/$newname" : "$newname";
 447
 448     my $cmd = $rbd_cmd->(
 449         $scfg,
 450         $storeid,
 451         'rename',
 452         get_rbd_path($scfg, $name),
 453         get_rbd_path($scfg, $newname),
 454     );
 455     run_rbd_command($cmd, errmsg => "rbd rename '$name' error");
 456
 457     my $running  = undef; #fixme : is create_base always offline ?
 458
 459     $class->volume_snapshot($scfg, $storeid, $newname, $snap, $running);
 460
 461     my (undef, undef, undef, $protected) = rbd_volume_info($scfg, $storeid, $newname, $snap);
 462
 463     if (!$protected){
 464         my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'protect', $newname, '--snap', $snap);
 465         run_rbd_command($cmd, errmsg => "rbd protect $newname snap '$snap' error");
 466     }
 467
 468     return $newvolname;
 469
 470 }
 471
 472 sub clone_image {
 473     my ($class, $scfg, $storeid, $volname, $vmid, $snapname) = @_;
 474
 475     my $snap = '__base__';
 476     $snap = $snapname if length $snapname;
 477
 478     my ($vtype, $basename, $basevmid, undef, undef, $isBase) =
 479         $class->parse_volname($volname);
 480
 481     die "$volname is not a base image and snapname is not provided\n"
 482         if !$isBase && !length($snapname);
 483
 484     my $name = $class->find_free_diskname($storeid, $scfg, $vmid);
 485
 486     warn "clone $volname: $basename snapname $snap to $name\n";
 487
 488     if (length($snapname)) {
 489         my (undef, undef, undef, $protected) = rbd_volume_info($scfg, $storeid, $volname, $snapname);
 490
 491         if (!$protected) {
 492             my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'protect', $volname, '--snap', $snapname);
 493             run_rbd_command($cmd, errmsg => "rbd protect $volname snap $snapname error");
 494         }
 495     }
 496
 497     my $newvol = "$basename/$name";
 498     $newvol = $name if length($snapname);
 499
 500     my @options = (
 501         get_rbd_path($scfg, $basename),
 502         '--snap', $snap,
 503     );
 504     push @options, ('--data-pool', $scfg->{'data-pool'}) if $scfg->{'data-pool'};
 505
 506     my $cmd = $rbd_cmd->($scfg, $storeid, 'clone', @options, get_rbd_path($scfg, $name));
 507     run_rbd_command($cmd, errmsg => "rbd clone '$basename' error");
 508
 509     return $newvol;
 510 }
 511
 512 sub alloc_image {
 513     my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
 514
 515
 516     die "illegal name '$name' - should be 'vm-$vmid-*'\n"
 517         if  $name && $name !~ m/^vm-$vmid-/;
 518
 519     $name = $class->find_free_diskname($storeid, $scfg, $vmid) if !$name;
 520
 521     my @options = (
 522         '--image-format' , 2,
 523         '--size', int(($size + 1023) / 1024),
 524     );
 525     push @options, ('--data-pool', $scfg->{'data-pool'}) if $scfg->{'data-pool'};
 526
 527     my $cmd = $rbd_cmd->($scfg, $storeid, 'create', @options, $name);
 528     run_rbd_command($cmd, errmsg => "rbd create '$name' error");
 529
 530     return $name;
 531 }
 532
 533 sub free_image {
 534     my ($class, $storeid, $scfg, $volname, $isBase) = @_;
 535
 536     my ($vtype, $name, $vmid, undef, undef, undef) =
 537         $class->parse_volname($volname);
 538
 539
 540     my $snaps = rbd_ls_snap($scfg, $storeid, $name);
 541     foreach my $snap (keys %$snaps) {
 542         if ($snaps->{$snap}->{protected}) {
 543             my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'unprotect', $name, '--snap', $snap);
 544             run_rbd_command($cmd, errmsg => "rbd unprotect $name snap '$snap' error");
 545         }
 546     }
 547
 548     $class->deactivate_volume($storeid, $scfg, $volname);
 549
 550     my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'purge',  $name);
 551     run_rbd_command($cmd, errmsg => "rbd snap purge '$name' error");
 552
 553     $cmd = $rbd_cmd->($scfg, $storeid, 'rm', $name);
 554     run_rbd_command($cmd, errmsg => "rbd rm '$name' error");
 555
 556     return undef;
 557 }
 558
 559 sub list_images {
 560     my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
 561
 562     $cache->{rbd} = rbd_ls($scfg, $storeid) if !$cache->{rbd};
 563
 564     my $dat = $cache->{rbd}->{get_rbd_path($scfg)};
 565     return [] if !$dat; # nothing found
 566
 567     my $res = [];
 568     for my $image (sort keys %$dat) {
 569         my $info = $dat->{$image};
 570         my ($volname, $parent, $owner) = $info->@{'name', 'parent', 'vmid'};
 571
 572         if ($parent && $parent =~ m/^(base-\d+-\S+)\@__base__$/) {
 573             $info->{volid} = "$storeid:$1/$volname";
 574         } else {
 575             $info->{volid} = "$storeid:$volname";
 576         }
 577
 578         if ($vollist) {
 579             my $found = grep { $_ eq $info->{volid} } @$vollist;
 580             next if !$found;
 581         } else {
 582             next if defined ($vmid) && ($owner ne $vmid);
 583         }
 584
 585         $info->{format} = 'raw';
 586
 587         push @$res, $info;
 588     }
 589
 590     return $res;
 591 }
 592
 593 sub status {
 594     my ($class, $storeid, $scfg, $cache) = @_;
 595
 596     my $rados = $librados_connect->($scfg, $storeid);
 597     my $df = $rados->mon_command({ prefix => 'df', format => 'json' });
 598
 599     my ($d) = grep { $_->{name} eq $scfg->{pool} } @{$df->{pools}};
 600
 601     # max_avail -> max available space for data w/o replication in the pool
 602     # bytes_used -> data w/o replication in the pool
 603     my $free = $d->{stats}->{max_avail};
 604     my $used = $d->{stats}->{stored} // $d->{stats}->{bytes_used};
 605     my $total = $used + $free;
 606     my $active = 1;
 607
 608     return ($total, $free, $used, $active);
 609 }
 610
 611 sub activate_storage {
 612     my ($class, $storeid, $scfg, $cache) = @_;
 613     return 1;
 614 }
 615
 616 sub deactivate_storage {
 617     my ($class, $storeid, $scfg, $cache) = @_;
 618     return 1;
 619 }
 620
 621 my sub get_kernel_device_path {
 622     my ($scfg, $name) = @_;
 623     return "/dev/rbd/" . get_rbd_path($scfg, $name);
 624 };
 625
 626 sub map_volume {
 627     my ($class, $storeid, $scfg, $volname, $snapname) = @_;
 628
 629     my ($vtype, $img_name, $vmid) = $class->parse_volname($volname);
 630
 631     my $name = $img_name;
 632     $name .= '@'.$snapname if $snapname;
 633
 634     my $kerneldev = get_kernel_device_path($scfg, $name);
 635
 636     return $kerneldev if -b $kerneldev; # already mapped
 637
 638     # features can only be enabled/disabled for image, not for snapshot!
 639     $krbd_feature_update->($scfg, $storeid, $img_name);
 640
 641     my $cmd = $rbd_cmd->($scfg, $storeid, 'map', $name);
 642     run_rbd_command($cmd, errmsg => "can't map rbd volume $name");
 643
 644     return $kerneldev;
 645 }
 646
 647 sub unmap_volume {
 648     my ($class, $storeid, $scfg, $volname, $snapname) = @_;
 649
 650     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 651     $name .= '@'.$snapname if $snapname;
 652
 653     my $kerneldev = get_kernel_device_path($scfg, $name);
 654
 655     if (-b $kerneldev) {
 656         my $cmd = $rbd_cmd->($scfg, $storeid, 'unmap', $kerneldev);
 657         run_rbd_command($cmd, errmsg => "can't unmap rbd device $kerneldev");
 658     }
 659
 660     return 1;
 661 }
 662
 663 sub activate_volume {
 664     my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
 665
 666     $class->map_volume($storeid, $scfg, $volname, $snapname) if $scfg->{krbd};
 667
 668     return 1;
 669 }
 670
 671 sub deactivate_volume {
 672     my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
 673
 674     $class->unmap_volume($storeid, $scfg, $volname, $snapname);
 675
 676     return 1;
 677 }
 678
 679 sub volume_size_info {
 680     my ($class, $scfg, $storeid, $volname, $timeout) = @_;
 681
 682     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 683     my ($size, undef) = rbd_volume_info($scfg, $storeid, $name);
 684     return $size;
 685 }
 686
 687 sub volume_resize {
 688     my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
 689
 690     return 1 if $running && !$scfg->{krbd}; # FIXME???
 691
 692     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 693
 694     my $cmd = $rbd_cmd->($scfg, $storeid, 'resize', '--allow-shrink', '--size', ($size/1024/1024), $name);
 695     run_rbd_command($cmd, errmsg => "rbd resize '$volname' error");
 696     return undef;
 697 }
 698
 699 sub volume_snapshot {
 700     my ($class, $scfg, $storeid, $volname, $snap) = @_;
 701
 702     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 703
 704     my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'create', '--snap', $snap, $name);
 705     run_rbd_command($cmd, errmsg => "rbd snapshot '$volname' error");
 706     return undef;
 707 }
 708
 709 sub volume_snapshot_rollback {
 710     my ($class, $scfg, $storeid, $volname, $snap) = @_;
 711
 712     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 713
 714     my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'rollback', '--snap', $snap, $name);
 715     run_rbd_command($cmd, errmsg => "rbd snapshot $volname to '$snap' error");
 716 }
 717
 718 sub volume_snapshot_delete {
 719     my ($class, $scfg, $storeid, $volname, $snap, $running) = @_;
 720
 721     return 1 if $running && !$scfg->{krbd}; # FIXME: ????
 722
 723     $class->deactivate_volume($storeid, $scfg, $volname, $snap, {});
 724
 725     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
 726
 727     my (undef, undef, undef, $protected) = rbd_volume_info($scfg, $storeid, $name, $snap);
 728     if ($protected){
 729         my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'unprotect', $name, '--snap', $snap);
 730         run_rbd_command($cmd, errmsg => "rbd unprotect $name snap '$snap' error");
 731     }
 732
 733     my $cmd = $rbd_cmd->($scfg, $storeid, 'snap', 'rm', '--snap', $snap, $name);
 734
 735     run_rbd_command($cmd, errmsg => "rbd snapshot '$volname' error");
 736
 737     return undef;
 738 }
 739
 740 sub volume_snapshot_needs_fsfreeze {
 741     return 1;
 742 }
 743
 744 sub volume_has_feature {
 745     my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
 746
 747    my $features = {
 748         snapshot => { current => 1, snap => 1},
 749         clone => { base => 1, snap => 1},
 750         template => { current => 1},
 751         copy => { base => 1, current => 1, snap => 1},
 752         sparseinit => { base => 1, current => 1},
 753         rename => {current => 1},
 754     };
 755
 756     my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = $class->parse_volname($volname);
 757
 758     my $key = undef;
 759     if ($snapname){
 760         $key = 'snap';
 761     } else {
 762         $key = $isBase ? 'base' : 'current';
 763     }
 764     return 1 if $features->{$feature}->{$key};
 765
 766     return undef;
 767 }
 768
 769 sub rename_volume {
 770     my ($class, $scfg, $storeid, $source_volname, $target_vmid, $target_volname) = @_;
 771
 772     my (
 773         undef,
 774         $source_image,
 775         $source_vmid,
 776         $base_name,
 777         $base_vmid,
 778         undef,
 779         $format
 780     ) = $class->parse_volname($source_volname);
 781     $target_volname = $class->find_free_diskname($storeid, $scfg, $target_vmid, $format)
 782         if !$target_volname;
 783
 784     eval {
 785         my $cmd = $rbd_cmd->($scfg, $storeid, 'info', $target_volname);
 786         run_rbd_command($cmd, errmsg => "exist check",  quiet => 1);
 787     };
 788     die "target volume '${target_volname}' already exists\n" if !$@;
 789
 790     my $cmd = $rbd_cmd->($scfg, $storeid, 'rename', $source_image, $target_volname);
 791
 792     run_rbd_command(
 793         $cmd,
 794         errmsg => "could not rename image '${source_image}' to '${target_volname}'",
 795     );
 796
 797     $base_name = $base_name ? "${base_name}/" : '';
 798
 799     return "${storeid}:${base_name}${target_volname}";
 800 }
 801
 802 1;