LU-11376 lmv: new foreign LMV format

[fs/lustre-release.git] / lustre / mdc / mdc_request.c

diff --git a/lustre/mdc/mdc_request.c b/lustre/mdc/mdc_request.c
index 048c25a..0db1628 100644 (file)
--- a/lustre/mdc/mdc_request.c
+++ b/lustre/mdc/mdc_request.c
@@ -602,10 +602,17 @@ int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
                                GOTO(out, rc);
 
                        if (rc < (typeof(rc))sizeof(*md->lmv)) {
-                               CDEBUG(D_INFO, "size too small:  "
-                                      "rc < sizeof(*md->lmv) (%d < %d)\n",
-                                       rc, (int)sizeof(*md->lmv));
-                               GOTO(out, rc = -EPROTO);
+                               struct lmv_foreign_md   *lfm = md->lfm;
+
+                               /* short (< sizeof(struct lmv_stripe_md))
+                                * foreign LMV case
+                                */
+                               if (lfm->lfm_magic != LMV_MAGIC_FOREIGN) {
+                                       CDEBUG(D_INFO,
+                                              "size too small: rc < sizeof(*md->lmv) (%d < %d)\n",
+                                              rc, (int)sizeof(*md->lmv));
+                                       GOTO(out, rc = -EPROTO);
+                               }
                        }
                }
         }