dapl_rsp_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 2003 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31/* 32 * 33 * MODULE: dapl_rsp_free.c 34 * 35 * PURPOSE: Connection management 36 * Description: Interfaces in this file are completely described in 37 * the DAPL 1.1 API, Chapter 6, section 4 38 * 39 * $Id: dapl_rsp_free.c,v 1.16 2003/07/25 19:24:11 sjs2 Exp $ 40 */ 41 42#include "dapl.h" 43#include "dapl_sp_util.h" 44#include "dapl_ia_util.h" 45#include "dapl_adapter_util.h" 46 47/* 48 * dapl_rsp_free 49 * 50 * uDAPL: User Direct Access Program Library Version 1.1, 6.4.3.5 51 * 52 * Destroy a specific instance of a Reserved Service Point. 53 * 54 * Input: 55 * rsp_handle 56 * 57 * Output: 58 * none 59 * 60 * Returns: 61 * DAT_SUCCESS 62 * DAT_INVALID_HANDLE 63 */ 64DAT_RETURN 65dapl_rsp_free( 66 IN DAT_RSP_HANDLE rsp_handle) 67{ 68 DAPL_IA *ia_ptr; 69 DAPL_SP *sp_ptr; 70 DAPL_EP *ep_ptr; 71 DAT_RETURN dat_status; 72 73 dat_status = DAT_SUCCESS; 74 75 sp_ptr = (DAPL_SP *)rsp_handle; 76 /* 77 * Verify handle 78 */ 79 dapl_dbg_log(DAPL_DBG_TYPE_CM, 80 ">>> dapl_rsp_free %p\n", 81 rsp_handle); 82 if (DAPL_BAD_HANDLE(sp_ptr, DAPL_MAGIC_RSP)) { 83 dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 84 DAT_INVALID_HANDLE_RSP); 85 goto bail; 86 } 87 88 /* ia_ptr = (DAPL_IA *)sp_ptr->header.owner_ia; */ 89 ia_ptr = sp_ptr->header.owner_ia; 90 91 /* 92 * Remove the connection listener if there are no connections. If 93 * we defer removing the sp it becomes something of a zombie 94 * container until disconnection, after which it will be cleaned up. 95 */ 96 dapl_os_lock(&sp_ptr->header.lock); 97 98 /* 99 * Make sure we don't leave a dangling EP. If the state is still 100 * RESERVED then the RSP still owns it. 101 */ 102 ep_ptr = (DAPL_EP *)sp_ptr->ep_handle; 103 if (ep_ptr->param.ep_state == DAT_EP_STATE_RESERVED) { 104 ep_ptr->param.ep_state = DAT_EP_STATE_UNCONNECTED; 105 } 106 sp_ptr->ep_handle = NULL; 107 108 /* Release reference on EVD */ 109 dapl_os_atomic_dec(&((DAPL_EVD *)sp_ptr->evd_handle)->evd_ref_count); 110 sp_ptr->evd_handle = NULL; 111 112 /* 113 * Release the base resource if there are no outstanding connections; 114 * else the last disconnect on this RSP will free it up. The RSP 115 * is used to contain CR records for each connection, which 116 * contain information necessary to disconnect. 117 */ 118 if (sp_ptr->listening == DAT_TRUE && sp_ptr->cr_list_count == 0) { 119 sp_ptr->listening = DAT_FALSE; 120 sp_ptr->state = DAPL_SP_STATE_FREE; 121 dapl_os_unlock(&sp_ptr->header.lock); 122 dat_status = dapls_ib_remove_conn_listener(ia_ptr, sp_ptr); 123 if (dat_status != DAT_SUCCESS) { 124 sp_ptr->listening = DAT_TRUE; 125 sp_ptr->state = DAPL_SP_STATE_RSP_LISTENING; 126 goto bail; 127 } 128 dapls_ia_unlink_sp(ia_ptr, sp_ptr); 129 dapls_sp_free_sp(sp_ptr); 130 131 } else { 132 /* 133 * The RSP is now in the pending state, where it will sit until 134 * the connection terminates or the app uses the same 135 * ServiceID again, which will reactivate it. 136 */ 137 sp_ptr->state = DAPL_SP_STATE_RSP_PENDING; 138 dapl_os_unlock(&sp_ptr->header.lock); 139 } 140 141bail: 142 return (dat_status); 143} 144 145/* 146 * Local variables: 147 * c-indent-level: 4 148 * c-basic-offset: 4 149 * c-brace-offset: -4 150 * tab-width: 8 151 * End: 152 */ 153