+# Check if a disk or any of its partitions has a holder.
+# Can also be called with a partition.
+# Expected to be called with a result of verify_blockdev_path().
+sub has_holder {
+ my ($devpath) = @_;
+
+ my $dev = strip_dev($devpath);
+
+ return $devpath if !dir_is_empty("/sys/class/block/${dev}/holders");
+
+ my $found;
+ dir_glob_foreach("/sys/block/${dev}", "${dev}.+", sub {
+ my ($part) = @_;
+ $found = "/dev/${part}" if !dir_is_empty("/sys/class/block/${part}/holders");
+ });
+
+ return $found;
+}
+
+# Basic check if a disk or any of its partitions is mounted.
+# Can also be called with a partition.
+# Expected to be called with a result of verify_blockdev_path().
+sub is_mounted {
+ my ($devpath) = @_;
+
+ my $mounted = mounted_blockdevs();
+
+ return $devpath if $mounted->{$devpath};
+
+ my $dev = strip_dev($devpath);
+
+ my $found;
+ dir_glob_foreach("/sys/block/${dev}", "${dev}.+", sub {
+ my ($part) = @_;
+ my $partpath = "/dev/${part}";
+
+ $found = $partpath if $mounted->{$partpath};
+ });
+
+ return $found;
+}
+
+# Currently only supports GPT-partitioned disks.
+sub change_parttype {
+ my ($partpath, $parttype) = @_;
+
+ my $err = "unable to change partition type for $partpath";
+
+ my $partnum = get_partnum($partpath);
+ my $blockdev = get_blockdev($partpath);
+ my $dev = strip_dev($blockdev);
+
+ my $info = get_disks($dev, 1);
+ die "$err - unable to get disk info for '$blockdev'\n" if !defined($info->{$dev});
+ die "$err - disk '$blockdev' is not GPT partitioned\n" if !$info->{$dev}->{gpt};
+
+ run_command(['sgdisk', "-t${partnum}:${parttype}", $blockdev], errmsg => $err);
+}
+
+# Wipes all labels and the first 200 MiB of a disk/partition (or the whole if it is smaller).
+# If called with a partition, also sets the partition type to 0x83 'Linux filesystem'.
+# Expected to be called with a result of verify_blockdev_path().
+sub wipe_blockdev {
+ my ($devpath) = @_;
+
+ my $devname = basename($devpath);
+ my $dev_size = PVE::Tools::file_get_contents("/sys/class/block/$devname/size");
+
+ ($dev_size) = $dev_size =~ m|(\d+)|; # untaint $dev_size
+ die "Couldn't get the size of the device $devname\n" if !defined($dev_size);
+
+ my $size = ($dev_size * 512 / 1024 / 1024);
+ my $count = ($size < 200) ? $size : 200;
+
+ my $to_wipe = [];
+ dir_glob_foreach("/sys/class/block/${devname}", "${devname}.+", sub {
+ my ($part) = @_;
+ push $to_wipe->@*, "/dev/${part}" if -b "/dev/${part}";
+ });
+
+ if (scalar($to_wipe->@*) > 0) {
+ print "found child partitions to wipe: ". join(', ', $to_wipe->@*) ."\n";
+ }
+ push $to_wipe->@*, $devpath; # put actual device last
+
+ print "wiping block device ${devpath}\n";
+
+ run_command(['wipefs', '--all', $to_wipe->@*], errmsg => "error wiping '${devpath}'");
+
+ run_command(
+ ['dd', 'if=/dev/zero', "of=${devpath}", 'bs=1M', 'conv=fdatasync', "count=${count}"],
+ errmsg => "error wiping '${devpath}'",
+ );
+
+ if (is_partition($devpath)) {
+ eval { change_parttype($devpath, '8300'); };
+ warn $@ if $@;
+ }
+}
+