+static int osc_object_ast_clear(struct ldlm_lock *lock, void *data)
+{
+ ENTRY;
+
+ if (lock->l_ast_data == data)
+ lock->l_ast_data = NULL;
+ RETURN(LDLM_ITER_CONTINUE);
+}
+
+static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
+{
+ struct osc_object *osc = cl2osc(obj);
+ struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
+
+ /* DLM locks don't hold a reference of osc_object so we have to
+ * clear it before the object is being destroyed. */
+ ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
+ ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
+ osc_object_ast_clear, osc);
+ return 0;
+}
+
+static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
+ struct ll_fiemap_info_key *fmkey,
+ struct fiemap *fiemap, size_t *buflen)
+{
+ struct obd_export *exp = osc_export(cl2osc(obj));
+ struct ldlm_res_id resid;
+ union ldlm_policy_data policy;
+ struct lustre_handle lockh;
+ enum ldlm_mode mode = LCK_MINMODE;
+ struct ptlrpc_request *req;
+ struct fiemap *reply;
+ char *tmp;
+ int rc;
+ ENTRY;
+
+ fmkey->lfik_oa.o_oi = cl2osc(obj)->oo_oinfo->loi_oi;
+ if (!(fmkey->lfik_fiemap.fm_flags & FIEMAP_FLAG_SYNC))
+ goto skip_locking;
+
+ policy.l_extent.start = fmkey->lfik_fiemap.fm_start & PAGE_MASK;
+
+ if (OBD_OBJECT_EOF - fmkey->lfik_fiemap.fm_length <=
+ fmkey->lfik_fiemap.fm_start + PAGE_SIZE - 1)
+ policy.l_extent.end = OBD_OBJECT_EOF;
+ else
+ policy.l_extent.end = (fmkey->lfik_fiemap.fm_start +
+ fmkey->lfik_fiemap.fm_length +
+ PAGE_SIZE - 1) & PAGE_MASK;
+
+ ostid_build_res_name(&fmkey->lfik_oa.o_oi, &resid);
+ mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
+ LDLM_FL_BLOCK_GRANTED | LDLM_FL_LVB_READY,
+ &resid, LDLM_EXTENT, &policy,
+ LCK_PR | LCK_PW, &lockh, 0);
+ if (mode) { /* lock is cached on client */
+ if (mode != LCK_PR) {
+ ldlm_lock_addref(&lockh, LCK_PR);
+ ldlm_lock_decref(&lockh, LCK_PW);
+ }
+ } else { /* no cached lock, needs acquire lock on server side */
+ fmkey->lfik_oa.o_valid |= OBD_MD_FLFLAGS;
+ fmkey->lfik_oa.o_flags |= OBD_FL_SRVLOCK;
+ }
+
+skip_locking:
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_OST_GET_INFO_FIEMAP);
+ if (req == NULL)
+ GOTO(drop_lock, rc = -ENOMEM);
+
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY, RCL_CLIENT,
+ sizeof(*fmkey));
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_CLIENT,
+ *buflen);
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL, RCL_SERVER,
+ *buflen);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
+ if (rc != 0) {
+ ptlrpc_request_free(req);
+ GOTO(drop_lock, rc);
+ }
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
+ memcpy(tmp, fmkey, sizeof(*fmkey));
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+ memcpy(tmp, fiemap, *buflen);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc != 0)
+ GOTO(fini_req, rc);
+
+ reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+ if (reply == NULL)
+ GOTO(fini_req, rc = -EPROTO);
+
+ memcpy(fiemap, reply, *buflen);
+fini_req:
+ ptlrpc_req_finished(req);
+drop_lock:
+ if (mode)
+ ldlm_lock_decref(&lockh, LCK_PR);
+ RETURN(rc);
+}