osd/osd_types: fix pi_compact_rep empty() condition

We may have no intervals but still be non-empty (have a first and
last), because during that period there were no osds.  This easily
happens when a pool is created before osds are up.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/osd/osd_types.cc b/src/osd/osd_types.cc
index 274e7441ee6eeead5570657b1b136a113f820ede..0743f86304cbf3d71d7e569e8bca7c09bcadb8e3 100644 (file)
--- a/src/osd/osd_types.cc
+++ b/src/osd/osd_types.cc
@@ -3090,7 +3090,9 @@ public:
   pi_compact_rep &operator=(pi_compact_rep &&) = default;
 
   size_t size() const override { return intervals.size(); }
-  bool empty() const override { return intervals.empty(); }
+  bool empty() const override {
+    return first > last || (first == 0 && last == 0);
+  }
   void clear() override {
     *this = pi_compact_rep();
   }