mds: disallow layout changes for files with data

Fixes: #10737
Signed-off-by: Yan, Zheng <zyan@redhat.com>

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index e31da938a0e54ae81382589036597da5cef6ac52..036267409e46e44309b02bcf0eef9beebce74e5c 100644 (file)
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -3924,6 +3924,11 @@ void Server::handle_set_vxattr(MDRequestRef& mdr, CInode *cur,
        respond_to_request(mdr, -EINVAL);
        return;
       }
+      if (cur->get_projected_inode()->size ||
+         cur->get_projected_inode()->truncate_seq > 1) {
+       respond_to_request(mdr, -ENOTEMPTY);
+       return;
+      }
       ceph_file_layout layout = cur->get_projected_inode()->layout;
       rest = name.substr(name.find("layout"));
       const OSDMap *osdmap = mds->objecter->get_osdmap_read();