mds: disallow certain file operations to "." and ".." dirents

Also, fixup return value for file operations such as rmdir()
and rename() on these directories.

Signed-off-by: Venky Shankar <vshankar@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/include/filepath.h b/src/include/filepath.h
index 09821b6ed37..b7b7b54385e 100644
--- a/src/include/filepath.h
+++ b/src/include/filepath.h
@@ -219,6 +219,17 @@ class filepath {
     o.push_back(new filepath("var/log", 1));
     o.push_back(new filepath("foo/bar", 101));
   }
+
+  bool is_last_dot_or_dotdot() const {
+    if (depth() > 0) {
+      std::string dname = last_dentry();
+      if (dname == "." || dname == "..") {
+        return true;
+      }
+    }
+
+    return false;
+  }
 };
 
 WRITE_CLASS_ENCODER(filepath)