1 files changed, 23 insertions, 0 deletions
diff --git a/src/common/CDC.cc b/src/common/CDC.cc
index 69cb978278f..e478ba46e51 100644
--- a/src/common/CDC.cc
+++ b/src/common/CDC.cc
@@ -20,3 +20,26 @@ std::unique_ptr<CDC> CDC::create(
   }
   return nullptr;
 }
+
+void generate_buffer(int size, bufferlist *outbl, int seed)
+{
+  std::mt19937_64 engine, engine2;
+  engine.seed(seed);
+  engine2.seed(seed);
+
+  // assemble from randomly-sized segments!
+  outbl->clear();
+  auto left = size;
+  while (left) {
+    size_t l = std::min<size_t>((engine2() & 0xffff0) + 16, left);
+    left -= l;
+    bufferptr p(l);
+    p.set_length(l);
+    char *b = p.c_str();
+    for (size_t i = 0; i < l / sizeof(uint64_t); ++i) {
+      ((ceph_le64 *)b)[i] = init_le64(engine());
+    }
+    outbl->append(p);
+  }
+}
+