rbd/resize: if new size is equal to original size, raise error

Signed-off-by: Zheng Yin zhengyin@cmss.chinamobile.com

diff --git a/src/tools/rbd/action/Resize.cc b/src/tools/rbd/action/Resize.cc
index aed5fdad137527dea4bf4f48ba22319b03d597e3..fdb3fcf0ac701268ff5880d77e97c597ba48af01 100644 (file)
--- a/src/tools/rbd/action/Resize.cc
+++ b/src/tools/rbd/action/Resize.cc
@@ -71,6 +71,11 @@ int execute(const po::variables_map &vm,
     return r;
   }
 
+  if (info.size == size) {
+    std::cerr << "rbd: new size is equal to original size " << std::endl;
+    return -EINVAL;
+  }
+
   if (info.size > size && !vm["allow-shrink"].as<bool>()) {
     r = -EINVAL;
   } else {