+++ /dev/null
-package PVE::Storage::LVMPlugin;
-
-use strict;
-use warnings;
-use Data::Dumper;
-use IO::File;
-use PVE::Tools qw(run_command trim);
-use PVE::Storage::Plugin;
-use PVE::JSONSchema qw(get_standard_option);
-
-use base qw(PVE::Storage::Plugin);
-
-# lvm helper functions
-
-sub lvm_pv_info {
- my ($device) = @_;
-
- die "no device specified" if !$device;
-
- my $has_label = 0;
-
- my $cmd = ['/usr/bin/file', '-L', '-s', $device];
- run_command($cmd, outfunc => sub {
- my $line = shift;
- $has_label = 1 if $line =~ m/LVM2/;
- });
-
- return undef if !$has_label;
-
- $cmd = ['/sbin/pvs', '--separator', ':', '--noheadings', '--units', 'k',
- '--unbuffered', '--nosuffix', '--options',
- 'pv_name,pv_size,vg_name,pv_uuid', $device];
-
- my $pvinfo;
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($pvname, $size, $vgname, $uuid) = split(':', $line);
-
- die "found multiple pvs entries for device '$device'\n"
- if $pvinfo;
-
- $pvinfo = {
- pvname => $pvname,
- size => $size,
- vgname => $vgname,
- uuid => $uuid,
- };
- });
-
- return $pvinfo;
-}
-
-sub clear_first_sector {
- my ($dev) = shift;
-
- if (my $fh = IO::File->new($dev, "w")) {
- my $buf = 0 x 512;
- syswrite $fh, $buf;
- $fh->close();
- }
-}
-
-sub lvm_create_volume_group {
- my ($device, $vgname, $shared) = @_;
-
- my $res = lvm_pv_info($device);
-
- if ($res->{vgname}) {
- return if $res->{vgname} eq $vgname; # already created
- die "device '$device' is already used by volume group '$res->{vgname}'\n";
- }
-
- clear_first_sector($device); # else pvcreate fails
-
- # we use --metadatasize 250k, which reseults in "pe_start = 512"
- # so pe_start is aligned on a 128k boundary (advantage for SSDs)
- my $cmd = ['/sbin/pvcreate', '--metadatasize', '250k', $device];
-
- run_command($cmd, errmsg => "pvcreate '$device' error");
-
- $cmd = ['/sbin/vgcreate', $vgname, $device];
- # push @$cmd, '-c', 'y' if $shared; # we do not use this yet
-
- run_command($cmd, errmsg => "vgcreate $vgname $device error");
-}
-
-sub lvm_vgs {
-
- my $cmd = ['/sbin/vgs', '--separator', ':', '--noheadings', '--units', 'b',
- '--unbuffered', '--nosuffix', '--options',
- 'vg_name,vg_size,vg_free'];
-
- my $vgs = {};
- eval {
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($name, $size, $free) = split (':', $line);
-
- $vgs->{$name} = { size => int ($size), free => int ($free) };
- });
- };
- my $err = $@;
-
- # just warn (vgs return error code 5 if clvmd does not run)
- # but output is still OK (list without clustered VGs)
- warn $err if $err;
-
- return $vgs;
-}
-
-sub lvm_list_volumes {
- my ($vgname) = @_;
-
- my $cmd = ['/sbin/lvs', '--separator', ':', '--noheadings', '--units', 'b',
- '--unbuffered', '--nosuffix', '--options',
- 'vg_name,lv_name,lv_size,lv_attr,pool_lv,data_percent,metadata_percent,snap_percent,uuid,tags'];
-
- push @$cmd, $vgname if $vgname;
-
- my $lvs = {};
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($vg_name, $lv_name, $lv_size, $lv_attr, $pool_lv, $data_percent, $meta_percent, $snap_percent, $uuid, $tags) = split(':', $line);
- return if !$vg_name;
- return if !$lv_name;
-
- my $lv_type = substr($lv_attr, 0, 1);
-
- my $d = {
- lv_size => $lv_size,
- lv_type => $lv_type,
- };
- $d->{pool_lv} = $pool_lv if $pool_lv;
-
- if ($lv_type eq 't') {
- $data_percent ||= 0;
- $meta_percent ||= 0;
- $snap_percent ||= 0;
- $d->{used} = int((($data_percent + $meta_percent + $snap_percent) * $lv_size)/100);
- }
- $lvs->{$vg_name}->{$lv_name} = $d;
- });
-
- return $lvs;
-}
-
-# Configuration
-
-sub type {
- return 'lvm';
-}
-
-sub plugindata {
- return {
- content => [ {images => 1, rootdir => 1}, { images => 1 }],
- };
-}
-
-sub properties {
- return {
- vgname => {
- description => "Volume group name.",
- type => 'string', format => 'pve-storage-vgname',
- },
- base => {
- description => "Base volume. This volume is automatically activated.",
- type => 'string', format => 'pve-volume-id',
- },
- saferemove => {
- description => "Zero-out data when removing LVs.",
- type => 'boolean',
- },
- saferemove_throughput => {
- description => "Wipe throughput (cstream -t parameter value).",
- type => 'string',
- },
- };
-}
-
-sub options {
- return {
- vgname => { fixed => 1 },
- nodes => { optional => 1 },
- shared => { optional => 1 },
- disable => { optional => 1 },
- saferemove => { optional => 1 },
- saferemove_throughput => { optional => 1 },
- content => { optional => 1 },
- base => { fixed => 1, optional => 1 },
- };
-}
-
-# Storage implementation
-
-sub parse_volname {
- my ($class, $volname) = @_;
-
- PVE::Storage::Plugin::parse_lvm_name($volname);
-
- if ($volname =~ m/^(vm-(\d+)-\S+)$/) {
- return ('images', $1, $2, undef, undef, undef, 'raw');
- }
-
- die "unable to parse lvm volume name '$volname'\n";
-}
-
-sub filesystem_path {
- my ($class, $scfg, $volname, $snapname) = @_;
-
- die "lvm snapshot is not implemented"if defined($snapname);
-
- my ($vtype, $name, $vmid) = $class->parse_volname($volname);
-
- my $vg = $scfg->{vgname};
-
- my $path = "/dev/$vg/$name";
-
- return wantarray ? ($path, $vmid, $vtype) : $path;
-}
-
-sub create_base {
- my ($class, $storeid, $scfg, $volname) = @_;
-
- die "can't create base images in lvm storage\n";
-}
-
-sub clone_image {
- my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_;
-
- die "can't clone images in lvm storage\n";
-}
-
-sub alloc_image {
- my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
-
- die "unsupported format '$fmt'" if $fmt ne 'raw';
-
- die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
- if $name && $name !~ m/^vm-$vmid-/;
-
- my $vgs = lvm_vgs();
-
- my $vg = $scfg->{vgname};
-
- die "no such volume group '$vg'\n" if !defined ($vgs->{$vg});
-
- my $free = int($vgs->{$vg}->{free});
-
- die "not enough free space ($free < $size)\n" if $free < $size;
-
- if (!$name) {
- my $lvs = lvm_list_volumes($vg);
-
- for (my $i = 1; $i < 100; $i++) {
- my $tn = "vm-$vmid-disk-$i";
- if (!defined ($lvs->{$vg}->{$tn})) {
- $name = $tn;
- last;
- }
- }
- }
-
- die "unable to allocate an image name for VM $vmid in storage '$storeid'\n"
- if !$name;
-
- my $cmd = ['/sbin/lvcreate', '-aly', '--addtag', "pve-vm-$vmid", '--size', "${size}k", '--name', $name, $vg];
-
- run_command($cmd, errmsg => "lvcreate '$vg/pve-vm-$vmid' error");
-
- return $name;
-}
-
-sub free_image {
- my ($class, $storeid, $scfg, $volname, $isBase) = @_;
-
- my $vg = $scfg->{vgname};
-
- # we need to zero out LVM data for security reasons
- # and to allow thin provisioning
-
- my $zero_out_worker = sub {
- print "zero-out data on image $volname (/dev/$vg/del-$volname)\n";
-
- # wipe throughput up to 10MB/s by default; may be overwritten with saferemove_throughput
- my $throughput = '-10485760';
- if ($scfg->{saferemove_throughput}) {
- $throughput = $scfg->{saferemove_throughput};
- }
-
- my $cmd = [
- '/usr/bin/cstream',
- '-i', '/dev/zero',
- '-o', "/dev/$vg/del-$volname",
- '-T', '10',
- '-v', '1',
- '-b', '1048576',
- '-t', "$throughput"
- ];
- eval { run_command($cmd, errmsg => "zero out finished (note: 'No space left on device' is ok here)"); };
- warn $@ if $@;
-
- $class->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
- my $cmd = ['/sbin/lvremove', '-f', "$vg/del-$volname"];
- run_command($cmd, errmsg => "lvremove '$vg/del-$volname' error");
- });
- print "successfully removed volume $volname ($vg/del-$volname)\n";
- };
-
- my $cmd = ['/sbin/lvchange', '-aly', "$vg/$volname"];
- run_command($cmd, errmsg => "can't activate LV '$vg/$volname' to zero-out its data");
-
- if ($scfg->{saferemove}) {
- # avoid long running task, so we only rename here
- $cmd = ['/sbin/lvrename', $vg, $volname, "del-$volname"];
- run_command($cmd, errmsg => "lvrename '$vg/$volname' error");
- return $zero_out_worker;
- } else {
- my $tmpvg = $scfg->{vgname};
- $cmd = ['/sbin/lvremove', '-f', "$tmpvg/$volname"];
- run_command($cmd, errmsg => "lvremove '$tmpvg/$volname' error");
- }
-
- return undef;
-}
-
-sub list_images {
- my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
-
- my $vgname = $scfg->{vgname};
-
- $cache->{lvs} = lvm_list_volumes() if !$cache->{lvs};
-
- my $res = [];
-
- if (my $dat = $cache->{lvs}->{$vgname}) {
-
- foreach my $volname (keys %$dat) {
-
- next if $volname !~ m/^vm-(\d+)-/;
- my $owner = $1;
-
- my $info = $dat->{$volname};
-
- next if $info->{lv_type} ne '-';
-
- my $volid = "$storeid:$volname";
-
- if ($vollist) {
- my $found = grep { $_ eq $volid } @$vollist;
- next if !$found;
- } else {
- next if defined($vmid) && ($owner ne $vmid);
- }
-
- push @$res, {
- volid => $volid, format => 'raw', size => $info->{lv_size}, vmid => $owner,
- };
- }
- }
-
- return $res;
-}
-
-sub status {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- $cache->{vgs} = lvm_vgs() if !$cache->{vgs};
-
- my $vgname = $scfg->{vgname};
-
- if (my $info = $cache->{vgs}->{$vgname}) {
- return ($info->{size}, $info->{free}, $info->{size} - $info->{free}, 1);
- }
-
- return undef;
-}
-
-sub activate_storage {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- $cache->{vgs} = lvm_vgs() if !$cache->{vgs};
-
- # In LVM2, vgscans take place automatically;
- # this is just to be sure
- if ($cache->{vgs} && !$cache->{vgscaned} &&
- !$cache->{vgs}->{$scfg->{vgname}}) {
- $cache->{vgscaned} = 1;
- my $cmd = ['/sbin/vgscan', '--ignorelockingfailure', '--mknodes'];
- eval { run_command($cmd, outfunc => sub {}); };
- warn $@ if $@;
- }
-
- # we do not acticate any volumes here ('vgchange -aly')
- # instead, volumes are activate individually later
-}
-
-sub deactivate_storage {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- my $cmd = ['/sbin/vgchange', '-aln', $scfg->{vgname}];
- run_command($cmd, errmsg => "can't deactivate VG '$scfg->{vgname}'");
-}
-
-sub activate_volume {
- my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
- #fix me lvmchange is not provided on
- my $path = $class->path($scfg, $volname, $snapname);
-
- my $lvm_activate_mode = 'ey';
-
- my $cmd = ['/sbin/lvchange', "-a$lvm_activate_mode", $path];
- run_command($cmd, errmsg => "can't activate LV '$path'");
-}
-
-sub deactivate_volume {
- my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
-
- my $path = $class->path($scfg, $volname, $snapname);
- return if ! -b $path;
-
- my $cmd = ['/sbin/lvchange', '-aln', $path];
- run_command($cmd, errmsg => "can't deactivate LV '$path'");
-}
-
-sub volume_resize {
- my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
-
- $size = ($size/1024/1024) . "M";
-
- my $path = $class->path($scfg, $volname);
- my $cmd = ['/sbin/lvextend', '-L', $size, $path];
- run_command($cmd, errmsg => "error resizing volume '$path'");
-
- return 1;
-}
-
-sub volume_snapshot {
- my ($class, $scfg, $storeid, $volname, $snap) = @_;
-
- die "lvm snapshot is not implemented";
-}
-
-sub volume_snapshot_rollback {
- my ($class, $scfg, $storeid, $volname, $snap) = @_;
-
- die "lvm snapshot rollback is not implemented";
-}
-
-sub volume_snapshot_delete {
- my ($class, $scfg, $storeid, $volname, $snap) = @_;
-
- die "lvm snapshot delete is not implemented";
-}
-
-sub volume_has_feature {
- my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
-
- my $features = {
- copy => { base => 1, current => 1},
- };
-
- my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
- $class->parse_volname($volname);
-
- my $key = undef;
- if($snapname){
- $key = 'snap';
- }else{
- $key = $isBase ? 'base' : 'current';
- }
- return 1 if $features->{$feature}->{$key};
-
- return undef;
-}
-
-1;