cached_extent: add get_crc32 helper

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 a2038ca691b7a6b4f129588f8b0dec64639f1351..93560c549ec34d67523c1fd1fbaca6d3129e1e57 100644 (file)
--- a/src/crimson/os/seastore/cached_extent.h
+++ b/src/crimson/os/seastore/cached_extent.h
@@ -196,6 +196,14 @@ public:
     return version;
   }
 
+  /// Returns crc32c of buffer
+  uint32_t get_crc32c(uint32_t crc) {
+    return ceph_crc32c(
+      crc,
+      reinterpret_cast<const unsigned char *>(get_bptr().c_str()),
+      get_length());
+  }
+
   /// Get ref to raw buffer
   bufferptr &get_bptr() { return ptr; }
   const bufferptr &get_bptr() const { return ptr; }