1 files changed, 28 insertions, 0 deletions
diff --git a/src/librbd/crypto/CryptoImageDispatch.cc b/src/librbd/crypto/CryptoImageDispatch.cc
new file mode 100644
index 000000000..15513bf55
--- /dev/null
+++ b/src/librbd/crypto/CryptoImageDispatch.cc
@@ -0,0 +1,28 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/crypto/CryptoImageDispatch.h"
+
+namespace librbd {
+namespace crypto {
+
+CryptoImageDispatch::CryptoImageDispatch(
+        uint64_t data_offset) : m_data_offset(data_offset) {
+}
+
+
+void CryptoImageDispatch::remap_extents(
+        io::Extents& image_extents, io::ImageExtentsMapType type) {
+  if (type == io::IMAGE_EXTENTS_MAP_TYPE_LOGICAL_TO_PHYSICAL) {
+    for (auto& extent: image_extents) {
+      extent.first += m_data_offset;
+    }
+  } else if (type == io::IMAGE_EXTENTS_MAP_TYPE_PHYSICAL_TO_LOGICAL) {
+    for (auto& extent: image_extents) {
+      extent.first -= m_data_offset;
+    }
+  }
+}
+
+} // namespace crypto
+} // namespace librbd