static int mdt_lvbo_size(struct ldlm_lock *lock) { struct mdt_device *mdt; /* resource on server side never changes. */ mdt = ldlm_res_to_ns(lock->l_resource)->ns_lvbp; LASSERT(mdt != NULL); if (IS_LQUOTA_RES(lock->l_resource)) { if (mdt->mdt_qmt_dev == NULL) return 0; /* call lvbo size function of quota master */ return qmt_hdls.qmth_lvbo_size(mdt->mdt_qmt_dev, lock); } if (ldlm_has_layout(lock)) return mdt->mdt_max_mdsize; return 0; }
/** * Callback handler for receiving incoming completion ASTs. * * This only can happen on client side. */ static void ldlm_handle_cp_callback(struct ptlrpc_request *req, struct ldlm_namespace *ns, struct ldlm_request *dlm_req, struct ldlm_lock *lock) { int lvb_len; LIST_HEAD(ast_list); int rc = 0; LDLM_DEBUG(lock, "client completion callback handler START"); if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) { int to = cfs_time_seconds(1); while (to > 0) { schedule_timeout_and_set_state( TASK_INTERRUPTIBLE, to); if (lock->l_granted_mode == lock->l_req_mode || lock->l_flags & LDLM_FL_DESTROYED) break; } } lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT); if (lvb_len < 0) { LDLM_ERROR(lock, "Fail to get lvb_len, rc = %d", lvb_len); GOTO(out, rc = lvb_len); } else if (lvb_len > 0) { if (lock->l_lvb_len > 0) { /* for extent lock, lvb contains ost_lvb{}. */ LASSERT(lock->l_lvb_data != NULL); if (unlikely(lock->l_lvb_len < lvb_len)) { LDLM_ERROR(lock, "Replied LVB is larger than " "expectation, expected = %d, " "replied = %d", lock->l_lvb_len, lvb_len); GOTO(out, rc = -EINVAL); } } else if (ldlm_has_layout(lock)) { /* for layout lock, lvb has * variable length */ void *lvb_data; OBD_ALLOC(lvb_data, lvb_len); if (lvb_data == NULL) { LDLM_ERROR(lock, "No memory: %d.\n", lvb_len); GOTO(out, rc = -ENOMEM); } lock_res_and_lock(lock); LASSERT(lock->l_lvb_data == NULL); lock->l_lvb_data = lvb_data; lock->l_lvb_len = lvb_len; unlock_res_and_lock(lock); } } lock_res_and_lock(lock); if ((lock->l_flags & LDLM_FL_DESTROYED) || lock->l_granted_mode == lock->l_req_mode) { /* bug 11300: the lock has already been granted */ unlock_res_and_lock(lock); LDLM_DEBUG(lock, "Double grant race happened"); GOTO(out, rc = 0); } /* If we receive the completion AST before the actual enqueue returned, * then we might need to switch lock modes, resources, or extents. */ if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) { lock->l_req_mode = dlm_req->lock_desc.l_granted_mode; LDLM_DEBUG(lock, "completion AST, new lock mode"); } if (lock->l_resource->lr_type != LDLM_PLAIN) { ldlm_convert_policy_to_local(req->rq_export, dlm_req->lock_desc.l_resource.lr_type, &dlm_req->lock_desc.l_policy_data, &lock->l_policy_data); LDLM_DEBUG(lock, "completion AST, new policy data"); } ldlm_resource_unlink_lock(lock); if (memcmp(&dlm_req->lock_desc.l_resource.lr_name, &lock->l_resource->lr_name, sizeof(lock->l_resource->lr_name)) != 0) { unlock_res_and_lock(lock); rc = ldlm_lock_change_resource(ns, lock, &dlm_req->lock_desc.l_resource.lr_name); if (rc < 0) { LDLM_ERROR(lock, "Failed to allocate resource"); GOTO(out, rc); } LDLM_DEBUG(lock, "completion AST, new resource"); CERROR("change resource!\n"); lock_res_and_lock(lock); } if (dlm_req->lock_flags & LDLM_FL_AST_SENT) { /* BL_AST locks are not needed in LRU. * Let ldlm_cancel_lru() be fast. */ ldlm_lock_remove_from_lru(lock); lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST; LDLM_DEBUG(lock, "completion AST includes blocking AST"); } if (lock->l_lvb_len > 0) { rc = ldlm_fill_lvb(lock, &req->rq_pill, RCL_CLIENT, lock->l_lvb_data, lvb_len); if (rc < 0) { unlock_res_and_lock(lock); GOTO(out, rc); } } ldlm_grant_lock(lock, &ast_list); unlock_res_and_lock(lock); LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work"); /* Let Enqueue to call osc_lock_upcall() and initialize * l_ast_data */ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2); ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST); LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)", lock); GOTO(out, rc); out: if (rc < 0) { lock_res_and_lock(lock); lock->l_flags |= LDLM_FL_FAILED; unlock_res_and_lock(lock); wake_up(&lock->l_waitq); } LDLM_LOCK_RELEASE(lock); }
static int mdt_lvbo_fill(struct ldlm_lock *lock, void *lvb, int lvblen) { struct lu_env env; struct mdt_thread_info *info; struct mdt_device *mdt; struct lu_fid *fid; struct mdt_object *obj = NULL; struct md_object *child = NULL; int rc; ENTRY; mdt = ldlm_lock_to_ns(lock)->ns_lvbp; if (IS_LQUOTA_RES(lock->l_resource)) { if (mdt->mdt_qmt_dev == NULL) RETURN(0); /* call lvbo fill function of quota master */ rc = qmt_hdls.qmth_lvbo_fill(mdt->mdt_qmt_dev, lock, lvb, lvblen); RETURN(rc); } if (!ldlm_has_layout(lock)) RETURN(0); /* layout lock will be granted to client, fill in lvb with layout */ /* XXX create an env to talk to mdt stack. We should get this env from * ptlrpc_thread->t_env. */ rc = lu_env_init(&env, LCT_MD_THREAD); /* Likely ENOMEM */ if (rc) RETURN(rc); info = lu_context_key_get(&env.le_ctx, &mdt_thread_key); /* Likely ENOMEM */ if (info == NULL) GOTO(out, rc = -ENOMEM); memset(info, 0, sizeof *info); info->mti_env = &env; info->mti_exp = lock->l_export; info->mti_mdt = mdt; /* XXX get fid by resource id. why don't include fid in ldlm_resource */ fid = &info->mti_tmp_fid2; fid_extract_from_res_name(fid, &lock->l_resource->lr_name); obj = mdt_object_find(&env, info->mti_mdt, fid); if (IS_ERR(obj)) GOTO(out, rc = PTR_ERR(obj)); if (!mdt_object_exists(obj) || mdt_object_remote(obj)) GOTO(out, rc = -ENOENT); child = mdt_object_child(obj); /* get the length of lsm */ rc = mo_xattr_get(&env, child, &LU_BUF_NULL, XATTR_NAME_LOV); if (rc < 0) GOTO(out, rc); if (rc > 0) { struct lu_buf *lmm = NULL; if (lvblen < rc) { CERROR("%s: expected %d actual %d.\n", mdt_obd_name(mdt), rc, lvblen); GOTO(out, rc = -ERANGE); } lmm = &info->mti_buf; lmm->lb_buf = lvb; lmm->lb_len = rc; rc = mo_xattr_get(&env, child, lmm, XATTR_NAME_LOV); if (rc < 0) GOTO(out, rc); } out: if (obj != NULL && !IS_ERR(obj)) mdt_object_put(&env, obj); lu_env_fini(&env); RETURN(rc < 0 ? 0 : rc); }