mon/MgrStatMonitor.cc: do not update score when disabled

This commit adds changes to ensure the availability score
tracking is not updated when the feature is disabled. We
will preserve the score calculated before the feature is
turned off and start updating it again when the feature
is enabled.

Fixes: https://tracker.ceph.com/issues/71494

Signed-off-by: Shraddha Agrawal <[email protected]>
(cherry picked from commit 017c9b9)

Author: shraddhaag

src/mon/MgrStatMonitor.cc

@@ -69,6 +69,14 @@ void MgrStatMonitor::create_initial()
 void MgrStatMonitor::calc_pool_availability()
 {
   dout(20) << __func__ << dendl;
+
+  // if feature is disabled by user, do not update the uptime 
+  // and downtime, exit early
+  if (!g_conf().get_val<bool>("enable_availability_tracking")) {
+    dout(20) << __func__ << " tracking availability score is disabled" << dendl;
+    return;
+  }
+
   auto pool_avail_end = pool_availability.end();
   for (const auto& i : digest.pool_pg_unavailable_map) {
     const auto& poolid = i.first;

src/mon/OSDMonitor.cc

@@ -14412,7 +14412,7 @@ bool OSDMonitor::prepare_command_impl(MonOpRequestRef op,
   } else if (prefix == "osd pool availability-status") {
     if (!g_conf().get_val<bool>("enable_availability_tracking")) {
       ss << "availability tracking is disabled; you can enable it by setting the config option enable_availability_tracking";
-      err = -EPERM;
+      err = -EOPNOTSUPP;
       goto reply_no_propose;
     }
     TextTable tbl;