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Diskmanage: add append_partition sub

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we will use this for adding a partition to a disk when using a device
for ceph osd db/wal which already has partitions on it

first we search for the highest partition number, then add the partition
and search for the resulting device (we cannot assume to simply
append the number, e.g. from /dev/nvme0n1 we get /dev/nvme0n1pX)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
This commit is contained in:
Dominik Csapak
2019-06-04 12:35:23 +02:00
committed by Thomas Lamprecht
parent 52a064afcd
commit 1dc3038d40
1 changed files with 33 additions and 0 deletions
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33
PVE/Diskmanage.pm
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@ -680,4 +680,37 @@ sub assert_disk_unused {
return undef;
}
sub append_partition {
my ($dev, $size) = @_;
my $devname = $dev;
$devname =~ s|^/dev/||;
my $newpartid = 1;
dir_glob_foreach("/sys/block/$devname", qr/\Q$devname\E.*?(\d+)/, sub {
my ($part, $partid) = @_;
if ($partid >= $newpartid) {
$newpartid = $partid + 1;
}
});
$size = PVE::Tools::convert_size($size, 'b' => 'mb');
run_command([ $SGDISK, '-n', "$newpartid:0:+${size}M", $dev ],
errmsg => "error creating partition '$newpartid' on '$dev'");
my $partition;
# loop again to detect the real partiton device which does not always follow
# a strict $devname$partition scheme like /dev/nvme0n1 -> /dev/nvme0n1p1
dir_glob_foreach("/sys/block/$devname", qr/\Q$devname\E.*$newpartid/, sub {
my ($part) = @_;
$partition = "/dev/$part";
});
return $partition;
}
1;