dapl_ep_free.c revision 9517:b4839b0aa7a4
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved. 24 */ 25 26/* 27 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31/* 32 * 33 * MODULE: dapl_ep_free.c 34 * 35 * PURPOSE: Endpoint management 36 * Description: Interfaces in this file are completely described in 37 * the DAPL 1.1 API, Chapter 6, section 5.4 38 * 39 * $Id: dapl_ep_free.c,v 1.21 2003/07/30 18:13:37 hobie16 Exp $ 40 */ 41 42#include "dapl.h" 43#include "dapl_ia_util.h" 44#include "dapl_ep_util.h" 45#include "dapl_adapter_util.h" 46#include "dapl_ring_buffer_util.h" 47 48/* 49 * dapl_ep_free 50 * 51 * DAPL Requirements Version xxx, 6.5.3 52 * 53 * Destroy an instance of the Endpoint 54 * 55 * Input: 56 * ep_handle 57 * 58 * Output: 59 * none 60 * 61 * Returns: 62 * DAT_SUCCESS 63 * DAT_INVALID_PARAMETER 64 * DAT_INVALID_STATE 65 */ 66DAT_RETURN 67dapl_ep_free( 68 IN DAT_EP_HANDLE ep_handle) 69{ 70 DAPL_EP *ep_ptr; 71 DAPL_IA *ia_ptr; 72 DAT_EP_PARAM *param; 73 DAT_RETURN dat_status = DAT_SUCCESS; 74 75 dapl_dbg_log(DAPL_DBG_TYPE_API, "dapl_ep_free (%p)\n", ep_handle); 76 77 ep_ptr = (DAPL_EP *) ep_handle; 78 param = &ep_ptr->param; 79 80 /* 81 * Verify parameter & state 82 */ 83 if (DAPL_BAD_HANDLE(ep_ptr, DAPL_MAGIC_EP) && 84 !(ep_ptr->header.magic == DAPL_MAGIC_EP_EXIT && 85 ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED)) { 86 dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 87 DAT_INVALID_HANDLE_EP); 88 goto bail; 89 } 90 91 if (ep_ptr->param.ep_state == DAT_EP_STATE_RESERVED || 92 ep_ptr->param.ep_state == DAT_EP_STATE_PASSIVE_CONNECTION_PENDING || 93 ep_ptr->param.ep_state == 94 DAT_EP_STATE_TENTATIVE_CONNECTION_PENDING) { 95 dapl_dbg_log(DAPL_DBG_TYPE_WARN, 96 "--> dapl_ep_free: invalid state: %x, ep %p\n", 97 ep_ptr->param.ep_state, ep_ptr); 98 dat_status = DAT_ERROR(DAT_INVALID_STATE, 99 dapls_ep_state_subtype(ep_ptr)); 100 goto bail; 101 } 102 103 ia_ptr = ep_ptr->header.owner_ia; 104 105 /* 106 * If we are connected, issue a disconnect. If we are in the 107 * disconnect_pending state, disconnect with the ABRUPT flag 108 * set. 109 */ 110 111 /* 112 * Do verification of parameters and the state change atomically. 113 */ 114 dapl_os_lock(&ep_ptr->header.lock); 115 116 if (ep_ptr->param.ep_state == DAT_EP_STATE_CONNECTED || 117 ep_ptr->param.ep_state == DAT_EP_STATE_ACTIVE_CONNECTION_PENDING || 118 ep_ptr->param.ep_state == DAT_EP_STATE_COMPLETION_PENDING || 119 ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECT_PENDING) { 120 /* 121 * Issue the disconnect and return. The DISCONNECT callback 122 * will invoke this routine and finish the job 123 */ 124 ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING; 125 dapl_os_unlock(&ep_ptr->header.lock); 126 127 dapl_dbg_log(DAPL_DBG_TYPE_EP, 128 "--> dapl_ep_free: disconnecting EP: %x, ep %p\n", 129 ep_ptr->param.ep_state, ep_ptr); 130 131 dat_status = dapls_ib_disconnect(ep_ptr, DAT_CLOSE_ABRUPT_FLAG); 132 ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING; 133 ep_ptr->header.magic = DAPL_MAGIC_EP_EXIT; 134 } else { 135 dapl_os_unlock(&ep_ptr->header.lock); 136 } 137 138 /* 139 * Release all reference counts and unlink this structure. If we 140 * got here from a callback, don't repeat this step 141 */ 142 if (!(ep_ptr->header.magic == DAPL_MAGIC_EP_EXIT && 143 ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED)) { 144 /* Remove link from the IA */ 145 dapl_ia_unlink_ep(ia_ptr, ep_ptr); 146 } 147 148 /* 149 * If the EP is disconnected tear everything down. Otherwise, 150 * disconnect the EP but leave the QP and basic EP structure 151 * intact; the callback code will finish the job. 152 */ 153 dapl_os_lock(&ep_ptr->header.lock); 154 if (ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED || 155 ep_ptr->param.ep_state == DAT_EP_STATE_UNCONNECTED) { 156 /* 157 * Update ref counts. Note the user may have used ep_modify 158 * to set handles to NULL. 159 */ 160 if (param->pz_handle != NULL) { 161 dapl_os_atomic_dec(&((DAPL_PZ *) 162 param->pz_handle)->pz_ref_count); 163 param->pz_handle = NULL; 164 } 165 if (param->recv_evd_handle != NULL) { 166 dapl_os_atomic_dec(&((DAPL_EVD *) 167 param->recv_evd_handle)->evd_ref_count); 168 param->recv_evd_handle = NULL; 169 } 170 if (param->request_evd_handle != NULL) { 171 dapl_os_atomic_dec(&((DAPL_EVD *) 172 param->request_evd_handle)->evd_ref_count); 173 param->request_evd_handle = NULL; 174 } 175 if (param->connect_evd_handle != NULL) { 176 dapl_os_atomic_dec(&((DAPL_EVD *) 177 param->connect_evd_handle)->evd_ref_count); 178 param->connect_evd_handle = NULL; 179 } 180 181 if (param->srq_handle != NULL) { 182 dapl_os_atomic_dec(&((DAPL_SRQ *) 183 param->srq_handle)->srq_ref_count); 184 param->srq_handle = NULL; 185 } 186 187 dapl_dbg_log(DAPL_DBG_TYPE_EP, 188 "--> dapl_ep_free: Free EP: %x, ep %p\n", 189 ep_ptr->param.ep_state, ep_ptr); 190 /* 191 * Free the QP. If the EP has never been used, 192 * the QP is invalid 193 */ 194 if (ep_ptr->qp_handle != IB_INVALID_HANDLE) { 195 dat_status = dapls_ib_qp_free(ia_ptr, ep_ptr); 196 /* 197 * This should always succeed, but report to the user if 198 * there is a problem 199 */ 200 if (dat_status != DAT_SUCCESS) { 201 goto bail; 202 } 203 ep_ptr->qp_handle = IB_INVALID_HANDLE; 204 } 205 dapl_os_unlock(&ep_ptr->header.lock); 206 /* Free the resource */ 207 dapl_ep_dealloc(ep_ptr); 208 } else { 209 dapl_os_unlock(&ep_ptr->header.lock); 210 } 211bail: 212 return (dat_status); 213 214} 215