udapl_tavor/common/dapl_ep_free.c

9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * CDDL HEADER START
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * The contents of this file are subject to the terms of the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Common Development and Distribution License (the "License").
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You may not use this file except in compliance with the License.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * or http://www.opensolaris.org/os/licensing.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * See the License for the specific language governing permissions
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * and limitations under the License.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * When distributing Covered Code, include this CDDL HEADER in each
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * If applicable, add the following below this CDDL HEADER, with the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * fields enclosed by brackets "[]" replaced with your own identifying
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * information: Portions Copyright [yyyy] [name of copyright owner]
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * CDDL HEADER END
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Use is subject to license terms.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * MODULE: dapl_ep_free.c
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * PURPOSE: Endpoint management
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Description: Interfaces in this file are completely described in
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *      the DAPL 1.1 API, Chapter 6, section 5.4
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * $Id: dapl_ep_free.c,v 1.21 2003/07/30 18:13:37 hobie16 Exp $
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl_ia_util.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl_ep_util.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl_adapter_util.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl_ring_buffer_util.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * dapl_ep_free
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * DAPL Requirements Version xxx, 6.5.3
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Destroy an instance of the Endpoint
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Input:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  ep_handle
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Output:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  none
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Returns:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  DAT_SUCCESS
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  DAT_INVALID_PARAMETER
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  DAT_INVALID_STATE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorDAT_RETURN
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylordapl_ep_free(
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    IN DAT_EP_HANDLE ep_handle)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor{
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAPL_EP *ep_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAPL_IA *ia_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAT_EP_PARAM *param;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAT_RETURN dat_status = DAT_SUCCESS;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dapl_dbg_log(DAPL_DBG_TYPE_API, "dapl_ep_free (%p)\n", ep_handle);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ep_ptr = (DAPL_EP *) ep_handle;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    param = &ep_ptr->param;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Verify parameter & state
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (DAPL_BAD_HANDLE(ep_ptr, DAPL_MAGIC_EP) &&
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        !(ep_ptr->header.magic == DAPL_MAGIC_EP_EXIT &&
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED)) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            DAT_INVALID_HANDLE_EP);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ep_ptr->param.ep_state == DAT_EP_STATE_RESERVED ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_PASSIVE_CONNECTION_PENDING ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state ==
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        DAT_EP_STATE_TENTATIVE_CONNECTION_PENDING) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_dbg_log(DAPL_DBG_TYPE_WARN,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            "--> dapl_ep_free: invalid state: %x, ep %p\n",
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ep_ptr->param.ep_state, ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_ERROR(DAT_INVALID_STATE,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapls_ep_state_subtype(ep_ptr));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ia_ptr = ep_ptr->header.owner_ia;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * If we are connected, issue a disconnect. If we are in the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * disconnect_pending state, disconnect with the ABRUPT flag
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * set.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Do verification of parameters and the state change atomically.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dapl_os_lock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ep_ptr->param.ep_state == DAT_EP_STATE_CONNECTED ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_ACTIVE_CONNECTION_PENDING ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_COMPLETION_PENDING ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECT_PENDING) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * Issue the disconnect and return. The DISCONNECT callback
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * will invoke this routine and finish the job
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_dbg_log(DAPL_DBG_TYPE_EP,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            "--> dapl_ep_free: disconnecting EP: %x, ep %p\n",
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ep_ptr->param.ep_state, ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = dapls_ib_disconnect(ep_ptr, DAT_CLOSE_ABRUPT_FLAG);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->header.magic = DAPL_MAGIC_EP_EXIT;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    } else {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Release all reference counts and unlink this structure. If we
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * got here from a callback, don't repeat this step
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (!(ep_ptr->header.magic == DAPL_MAGIC_EP_EXIT &&
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED)) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /* Remove link from the IA */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_ia_unlink_ep(ia_ptr, ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * If the EP is disconnected tear everything down.  Otherwise,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * disconnect the EP but leave the QP and basic EP structure
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * intact; the callback code will finish the job.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dapl_os_lock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED ||
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ep_ptr->param.ep_state == DAT_EP_STATE_UNCONNECTED) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * Update ref counts. Note the user may have used ep_modify
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * to set handles to NULL.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (param->pz_handle != NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapl_os_atomic_dec(&((DAPL_PZ *)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                param->pz_handle)->pz_ref_count);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            param->pz_handle = NULL;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (param->recv_evd_handle != NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapl_os_atomic_dec(&((DAPL_EVD *)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                param->recv_evd_handle)->evd_ref_count);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            param->recv_evd_handle = NULL;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (param->request_evd_handle != NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapl_os_atomic_dec(&((DAPL_EVD *)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                param->request_evd_handle)->evd_ref_count);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            param->request_evd_handle = NULL;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (param->connect_evd_handle != NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapl_os_atomic_dec(&((DAPL_EVD *)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                param->connect_evd_handle)->evd_ref_count);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            param->connect_evd_handle = NULL;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (param->srq_handle != NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dapl_os_atomic_dec(&((DAPL_SRQ *)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                param->srq_handle)->srq_ref_count);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            param->srq_handle = NULL;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_dbg_log(DAPL_DBG_TYPE_EP,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            "--> dapl_ep_free: Free EP: %x, ep %p\n",
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ep_ptr->param.ep_state, ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * Free the QP. If the EP has never been used,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         * the QP is invalid
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (ep_ptr->qp_handle != IB_INVALID_HANDLE) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            dat_status = dapls_ib_qp_free(ia_ptr, ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor             * This should always succeed, but report to the user if
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor             * there is a problem
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor             */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            if (dat_status != DAT_SUCCESS) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ep_ptr->qp_handle = IB_INVALID_HANDLE;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /* Free the resource */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_ep_dealloc(ep_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    } else {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&ep_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylorbail:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    return (dat_status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor}