kv/MemDB: fix MemDB::_init()

1. mkdir() returns zero on success, or -1 if an error
   occurred (in which case, errno is set appropriately).
2. we shall return the proper error result to caller on failure.

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

diff --git a/src/kv/MemDB.cc b/src/kv/MemDB.cc
index 8976e51f8cfb7a4df1a3563eee7813e5419bf6cf..0a67ca2886777583e873a337fa0a71997c6c0500 100644 (file)
--- a/src/kv/MemDB.cc
+++ b/src/kv/MemDB.cc
@@ -134,8 +134,10 @@ int MemDB::_init(bool create)
   if (create) {
     int r = ::mkdir(m_db_path.c_str(), 0700);
     if (r < 0) {
-      if (r != EEXIST) {
+      r = -errno;
+      if (r != -EEXIST) {
         derr << __func__ << " mkdir failed: " << cpp_strerror(r) << dendl;
+        return r;
       }
     }
  } else {