LU-1187 lod: prepare default stripe EA for remote directory

During remote directory create, it should prepare the default
stripe EA in declare, so the default EA can be set correctly
on the remote directory.

Change-Id: Ief93e72cc033f3553865f2abba53e81df0f3fa89
Signed-off-by: Wang Di <di.wang@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/4335
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/lod/lod_object.c b/lustre/lod/lod_object.c
index de28d9c..f082c91 100644 (file)
--- a/lustre/lod/lod_object.c
+++ b/lustre/lod/lod_object.c
@@ -707,7 +707,10 @@ static void lod_ah_init(const struct lu_env *env,
                        lc->ldo_def_stripe_offset = lp->ldo_def_stripe_offset;
                        lc->ldo_striping_cached = 1;
                        lc->ldo_def_striping_set = 1;
-                       CDEBUG(D_OTHER, "inherite striping defaults\n");
+                       CDEBUG(D_OTHER, "inherite EA sz:%d off:%d nr:%d\n",
+                              (int)lc->ldo_def_stripenr,
+                              (int)lc->ldo_def_stripe_size,
+                              (int)lc->ldo_def_stripe_offset);
                }
                return;
        }
@@ -901,11 +904,35 @@ static int lod_declare_object_create(const struct lu_env *env,
        } else if (dof->dof_type == DFT_DIR && lo->ldo_striping_cached) {
                struct lod_thread_info *info = lod_env_info(env);
 
-               info->lti_buf.lb_buf = NULL;
-               info->lti_buf.lb_len = sizeof(struct lov_user_md_v3);
+               struct lov_user_md_v3 *v3;
+
+               if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size,
+                                       lo->ldo_def_stripenr,
+                                       lo->ldo_def_stripe_offset))
+                       RETURN(0);
+
+               OBD_ALLOC_PTR(v3);
+               if (v3 == NULL)
+                       RETURN(-ENOMEM);
+
+               v3->lmm_magic = cpu_to_le32(LOV_MAGIC_V3);
+               v3->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
+               v3->lmm_object_id = fid_oid(lu_object_fid(&dt->do_lu));
+               v3->lmm_object_seq = fid_seq(lu_object_fid(&dt->do_lu));
+               v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
+               v3->lmm_stripe_count = cpu_to_le32(lo->ldo_def_stripenr);
+               v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
+               if (lo->ldo_pool)
+                       strncpy(v3->lmm_pool_name, lo->ldo_pool,
+                               LOV_MAXPOOLNAME);
+
+               info->lti_buf.lb_buf = v3;
+               info->lti_buf.lb_len = sizeof(*v3);
+
                /* to transfer default striping from the parent */
                rc = dt_declare_xattr_set(env, next, &info->lti_buf,
                                          XATTR_NAME_LOV, 0, th);
+               OBD_FREE_PTR(v3);
        }
 
 out: