LU-5648 ofd: Reject precreate requests below last_id

[fs/lustre-release.git] / lustre / ofd / ofd_dev.c

diff --git a/lustre/ofd/ofd_dev.c b/lustre/ofd/ofd_dev.c
index 6a7dee0..7d7387a 100644 (file)
--- a/lustre/ofd/ofd_dev.c
+++ b/lustre/ofd/ofd_dev.c
@@ -1680,6 +1680,16 @@ static int ofd_create_hdl(struct tgt_session_info *tsi)
                                       ofd_name(ofd), POSTID(&oa->o_oi));
                                GOTO(out, rc = -EINVAL);
                        }
+
+                       if (diff < 0) {
+                               /* LU-5648 */
+                               CERROR("%s: invalid precreate request for "
+                                      DOSTID", last_id " LPU64 ". "
+                                      "Likely MDS last_id corruption\n",
+                                      ofd_name(ofd), POSTID(&oa->o_oi),
+                                      ofd_seq_last_oid(oseq));
+                               GOTO(out, rc = -EINVAL);
+                       }
                }
        }
        if (diff > 0) {