LU-11376 lmv: new foreign LMV format

[fs/lustre-release.git] / lustre / lod / lod_lov.c

diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c
index 2197e41..3223e98 100644 (file)
--- a/lustre/lod/lod_lov.c
+++ b/lustre/lod/lod_lov.c
@@ -1513,6 +1513,22 @@ int lod_striping_load(const struct lu_env *env, struct lod_object *lo)
                        lo->ldo_comp_cached = 1;
        } else if (S_ISDIR(lod2lu_obj(lo)->lo_header->loh_attr)) {
                rc = lod_get_lmv_ea(env, lo);
+               if (rc > sizeof(struct lmv_foreign_md)) {
+                       struct lmv_foreign_md *lfm = info->lti_ea_store;
+
+                       if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN) {
+                               lo->ldo_foreign_lmv = info->lti_ea_store;
+                               lo->ldo_foreign_lmv_size =
+                                       info->lti_ea_store_size;
+                               info->lti_ea_store = NULL;
+                               info->lti_ea_store_size = 0;
+
+                               lo->ldo_dir_stripe_loaded = 1;
+                               lo->ldo_dir_is_foreign = 1;
+                               GOTO(unlock, rc = 0);
+                       }
+               }
+
                if (rc < (typeof(rc))sizeof(struct lmv_mds_md_v1)) {
                        /* Let's set stripe_loaded to avoid further
                         * stripe loading especially for non-stripe directory,