+/* If the OST-object does not recognize the MDT-object as its parent, and
+ * there is no other MDT-object claims as its parent, then just trust the
+ * given MDT-object as its parent. So update the OST-object filter_fid. */
+static int lfsck_layout_repair_unmatched_pair(const struct lu_env *env,
+ struct lfsck_component *com,
+ struct lfsck_layout_req *llr,
+ const struct lu_attr *pla)
+{
+ struct lfsck_thread_info *info = lfsck_env_info(env);
+ struct filter_fid *pfid = &info->lti_new_pfid;
+ struct lu_attr *tla = &info->lti_la3;
+ struct dt_object *parent = llr->llr_parent->llo_obj;
+ struct dt_object *child = llr->llr_child;
+ struct dt_device *dev = lfsck_obj2dt_dev(child);
+ const struct lu_fid *tfid = lu_object_fid(&parent->do_lu);
+ struct thandle *handle;
+ struct lu_buf *buf;
+ struct lustre_handle lh = { 0 };
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_LFSCK, "Repair unmatched MDT-OST pair for: parent "DFID
+ ", child "DFID", OST-index %u, stripe-index %u, owner %u:%u\n",
+ PFID(lfsck_dto2fid(parent)), PFID(lfsck_dto2fid(child)),
+ llr->llr_ost_idx, llr->llr_lov_idx, pla->la_uid, pla->la_gid);
+
+ rc = lfsck_layout_lock(env, com, parent, &lh,
+ MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR);
+ if (rc != 0)
+ RETURN(rc);
+
+ handle = dt_trans_create(env, dev);
+ if (IS_ERR(handle))
+ GOTO(unlock1, rc = PTR_ERR(handle));
+
+ pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
+ pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
+ /* The ff_parent->f_ver is not the real parent fid->f_ver. Instead,
+ * it is the OST-object index in the parent MDT-object layout. */
+ pfid->ff_parent.f_ver = cpu_to_le32(llr->llr_lov_idx);
+ buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
+
+ rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ tla->la_valid = LA_UID | LA_GID;
+ tla->la_uid = pla->la_uid;
+ tla->la_gid = pla->la_gid;
+ rc = dt_declare_attr_set(env, child, tla, handle);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ rc = dt_trans_start(env, dev, handle);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ dt_write_lock(env, parent, 0);
+ if (unlikely(lu_object_is_dying(parent->do_lu.lo_header)))
+ GOTO(unlock2, rc = 1);
+
+ rc = dt_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle,
+ BYPASS_CAPA);
+ if (rc != 0)
+ GOTO(unlock2, rc);
+
+ /* Get the latest parent's owner. */
+ rc = dt_attr_get(env, parent, tla, BYPASS_CAPA);
+ if (rc != 0)
+ GOTO(unlock2, rc);
+
+ tla->la_valid = LA_UID | LA_GID;
+ rc = dt_attr_set(env, child, tla, handle, BYPASS_CAPA);
+
+ GOTO(unlock2, rc);
+
+unlock2:
+ dt_write_unlock(env, parent);
+
+stop:
+ rc = lfsck_layout_trans_stop(env, dev, handle, rc);
+
+unlock1:
+ lfsck_layout_unlock(&lh);
+
+ return rc;
+}
+
+/* Check whether the OST-object correctly back points to the
+ * MDT-object (@parent) via the XATTR_NAME_FID xattr (@pfid). */
+static int lfsck_layout_check_parent(const struct lu_env *env,
+ struct lfsck_component *com,
+ struct dt_object *parent,
+ const struct lu_fid *pfid,
+ const struct lu_fid *cfid,
+ const struct lu_attr *pla,
+ const struct lu_attr *cla,
+ struct lfsck_layout_req *llr,
+ struct lu_buf *lov_ea, __u32 idx)
+{
+ struct lfsck_thread_info *info = lfsck_env_info(env);
+ struct lu_buf *buf = &info->lti_big_buf;
+ struct dt_object *tobj;
+ struct lov_mds_md_v1 *lmm;
+ struct lov_ost_data_v1 *objs;
+ int rc;
+ int i;
+ __u32 magic;
+ __u16 count;
+ ENTRY;
+
+ if (fid_is_zero(pfid)) {
+ /* client never wrote. */
+ if (cla->la_size == 0 && cla->la_blocks == 0)
+ RETURN(0);
+
+ RETURN(LLIT_UNMATCHED_PAIR);
+ }
+
+ if (unlikely(!fid_is_sane(pfid)))
+ RETURN(LLIT_UNMATCHED_PAIR);
+
+ if (lu_fid_eq(pfid, lu_object_fid(&parent->do_lu))) {
+ if (llr->llr_lov_idx == idx)
+ RETURN(0);
+
+ RETURN(LLIT_UNMATCHED_PAIR);
+ }
+
+ tobj = lfsck_object_find(env, com->lc_lfsck, pfid);
+ if (tobj == NULL)
+ RETURN(LLIT_UNMATCHED_PAIR);
+
+ if (IS_ERR(tobj))
+ RETURN(PTR_ERR(tobj));
+
+ if (!dt_object_exists(tobj))
+ GOTO(out, rc = LLIT_UNMATCHED_PAIR);
+
+ /* Load the tobj's layout EA, in spite of it is a local MDT-object or
+ * remote one on another MDT. Then check whether the given OST-object
+ * is in such layout. If yes, it is multiple referenced, otherwise it
+ * is unmatched referenced case. */
+ rc = lfsck_layout_get_lovea(env, tobj, buf, NULL);
+ if (rc == 0)
+ GOTO(out, rc = LLIT_UNMATCHED_PAIR);
+
+ if (rc < 0)
+ GOTO(out, rc);
+
+ lmm = buf->lb_buf;
+ rc = lfsck_layout_verify_header(lmm);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ /* Currently, we only support LOV_MAGIC_V1/LOV_MAGIC_V3 which has
+ * been verified in lfsck_layout_verify_header() already. If some
+ * new magic introduced in the future, then layout LFSCK needs to
+ * be updated also. */
+ magic = le32_to_cpu(lmm->lmm_magic);
+ if (magic == LOV_MAGIC_V1) {
+ objs = &(lmm->lmm_objects[0]);
+ } else {
+ LASSERT(magic == LOV_MAGIC_V3);
+ objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
+ }
+
+ count = le16_to_cpu(lmm->lmm_stripe_count);
+ for (i = 0; i < count; i++, objs++) {
+ struct lu_fid *tfid = &info->lti_fid2;
+ struct ost_id *oi = &info->lti_oi;
+
+ ostid_le_to_cpu(&objs->l_ost_oi, oi);
+ ostid_to_fid(tfid, oi, le32_to_cpu(objs->l_ost_idx));
+ if (lu_fid_eq(cfid, tfid)) {
+ *lov_ea = *buf;
+
+ GOTO(out, rc = LLIT_MULTIPLE_REFERENCED);
+ }
+ }
+
+ GOTO(out, rc = LLIT_UNMATCHED_PAIR);
+
+out:
+ lfsck_object_put(env, tobj);
+
+ return rc;
+}
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff