BlueStore: fix wrong decode logic of nid_max

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 2abf6b5cd3ba0239021a0466cdfc3e4fc55952e0..0b86b055e460665e2fe3001e973a81e82a3b900f 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -3376,8 +3376,9 @@ int BlueStore::_open_super_meta()
     nid_max = 0;
     bufferlist bl;
     db->get(PREFIX_SUPER, "nid_max", &bl);
+    bufferlist::iterator p = bl.begin();
     try {
-      ::decode(nid_max, bl);
+      ::decode(nid_max, p);
     } catch (buffer::error& e) {
     }
     dout(10) << __func__ << " old nid_max " << nid_max << dendl;