[pve-devel] [PATCH manager 1/2] Fix #2053: OSD destroy only on specified node

[Dominic Jäger]

Allow destroying only OSDs that belong to the node that has been specified in
the API path.

So if
 - OSD 1 belongs to node A and
 - OSD 2 belongs to node B
then
 - pvesh delete nodes/A/ceph/osd/1 is allowed but
 - pvesh delete nodes/A/ceph/osd/2 is not

Destroying an OSD via GUI automatically inserts the correct node
into the API path.

pveceph automatically insert the local node into the API call, too.
Consequently, it can now only destroy local OSDs (fix #2053).
 - pveceph osd destroy 1 is allowed on node A but
 - pveceph osd destroy 2 is not

Signed-off-by: Dominic Jäger <d.jaeger at proxmox.com>
---
 PVE/API2/Ceph/OSD.pm | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/PVE/API2/Ceph/OSD.pm b/PVE/API2/Ceph/OSD.pm
index b81a8054..6763e95b 100644
--- a/PVE/API2/Ceph/OSD.pm
+++ b/PVE/API2/Ceph/OSD.pm
@@ -478,6 +478,22 @@ __PACKAGE__->register_method ({
 	return $rpcenv->fork_worker('cephcreateosd', $devname,  $authuser, $worker);
     }});
 
+# Check if $osdid belongs to $nodename
+# $tree ... rados osd tree (passing the tree makes it easy to test)
+sub osd_belongs_to_node {
+    my ($tree, $nodename, $osdid) = @_;
+
+    die "No tree nodes found\n" if !($tree && $tree->{nodes});
+    my $allNodes = $tree->{nodes};
+
+    my @match = grep($_->{name} eq $nodename, @$allNodes);
+    my $node = shift @match; # contains rados information about $nodename
+    die "There must not be more than one such node in the list" if @match;
+
+    my $osds = $node->{children};
+    return grep($_ == $osdid, @$osds);
+}
+
 __PACKAGE__->register_method ({
     name => 'destroyosd',
     path => '{osdid}',
@@ -515,6 +531,15 @@ __PACKAGE__->register_method ({
 	my $cleanup = $param->{cleanup};
 
 	my $rados = PVE::RADOS->new();
+
+	my $osd_belongs_to_node = osd_belongs_to_node(
+	    $rados->mon_command({ prefix => 'osd tree' }),
+	    $param->{node},
+	    $osdid,
+	);
+	die "OSD osd.$osdid does not belong to node $param->{node}!"
+	    if !$osd_belongs_to_node;
+
 	# dies if osdid is unknown
 	my $osdstat = $get_osd_status->($rados, $osdid);
 
-- 
2.20.1