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