common: add an hobject_t::is_min() function

Signed-off-by: Greg Farnum <greg@inktank.com>

diff --git a/src/common/hobject.h b/src/common/hobject.h
index a769ad060d925989028a68bb5a5a2ff7a1e27331..edaf04a301fd64817da8d69d97c762d394a17a80 100644 (file)
--- a/src/common/hobject.h
+++ b/src/common/hobject.h
@@ -118,6 +118,13 @@ public:
   bool is_max() const {
     return max;
   }
+  bool is_min() const {
+    // this needs to match how it's constructed
+    return snap == 0 &&
+          hash == 0 &&
+          !max &&
+          pool == -1;
+  }
 
   static uint32_t _reverse_nibbles(uint32_t retval) {
     // reverse nibbles