LU-9846 lod: Add overstriping support

[fs/lustre-release.git] / lustre / mdt / mdt_open.c

diff --git a/lustre/mdt/mdt_open.c b/lustre/mdt/mdt_open.c
index 9211ee2..43d891c 100644 (file)
--- a/lustre/mdt/mdt_open.c
+++ b/lustre/mdt/mdt_open.c
@@ -542,6 +542,11 @@ static int mdt_finish_open(struct mdt_thread_info *info,
                RETURN(-EOPNOTSUPP);
        }
 
+       /* Overstriped files can crash older clients */
+       if (isreg && !exp_connect_overstriping(exp) &&
+           mdt_lmm_is_overstriping(ma->ma_lmm))
+               RETURN(-EOPNOTSUPP);
+
        /* LU-2275, simulate broken behaviour (esp. prevalent in
         * pre-2.4 servers where a very strange reply is sent on error
         * that looks like it was actually almost successful and a