crimson/os/seastore/cached_extent: add buffer sharing constructor

Signed-off-by: Samuel Just <sjust@redhat.com>

diff --git a/src/crimson/os/seastore/cached_extent.h b/src/crimson/os/seastore/cached_extent.h
index 83d54c77ead5b038c1bca50cf7d7536ae97335cf..463f5eeae595f77603565a7c6b6df0acf53fc243 100644 (file)
--- a/src/crimson/os/seastore/cached_extent.h
+++ b/src/crimson/os/seastore/cached_extent.h
@@ -278,6 +278,7 @@ private:
   }
 
 protected:
+  CachedExtent(CachedExtent &&other) = default;
   CachedExtent(ceph::bufferptr &&ptr) : ptr(std::move(ptr)) {}
   CachedExtent(const CachedExtent &other)
     : state(other.state),
@@ -285,6 +286,14 @@ protected:
       version(other.version),
       poffset(other.poffset) {}
 
+  struct share_buffer_t {};
+  CachedExtent(const CachedExtent &other, share_buffer_t) :
+    state(other.state),
+    ptr(other.ptr),
+    version(other.version),
+    poffset(other.poffset) {}
+
+
   friend class Cache;
   template <typename T, typename... Args>
   static TCachedExtentRef<T> make_cached_extent_ref(Args&&... args) {