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_psp_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_psp_free.c,v 1.17 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_psp_free
49 *
50 * uDAPL: User Direct Access Program Library Version 1.1, 6.4.1.2
51 *
52 * Destroy a specific instance of a Service Point.
53 *
54 * Input:
55 * 	psp_handle
56 *
57 * Output:
58 * 	none
59 *
60 * Returns:
61 * 	DAT_SUCCESS
62 * 	DAT_INVALID_PARAMETER
63 */
64
65DAT_RETURN
66dapl_psp_free(
67	IN DAT_PSP_HANDLE psp_handle)
68{
69	DAPL_IA *ia_ptr;
70	DAPL_SP *sp_ptr;
71	DAT_RETURN dat_status;
72
73	sp_ptr = (DAPL_SP *) psp_handle;
74	dat_status = DAT_SUCCESS;
75	/*
76	 * Verify handle
77	 */
78	dapl_dbg_log(DAPL_DBG_TYPE_CM, ">>> dapl_psp_free %p\n", psp_handle);
79
80	if (DAPL_BAD_HANDLE(sp_ptr, DAPL_MAGIC_PSP)) {
81		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
82		    DAT_INVALID_HANDLE_PSP);
83		goto bail;
84	}
85
86	/* ia_ptr = (DAPL_IA *)sp_ptr->header.owner_ia; */
87	ia_ptr = sp_ptr->header.owner_ia;
88	/*
89	 * Remove the connection listener if it has been established
90	 * and there are no current connections in progress.
91	 * If we defer removing the sp it becomes something of a zombie
92	 * container until the last connection is disconnected, after
93	 * which it will be cleaned up.
94	 */
95	dapl_os_lock(&sp_ptr->header.lock);
96	sp_ptr->listening = DAT_FALSE;
97	/*
98	 * Release reference on EVD.
99	 * If an error was encountered in a previous
100	 * free the evd_handle will be NULL
101	 */
102	if (sp_ptr->evd_handle) {
103		dapl_os_atomic_dec(&((DAPL_EVD *)sp_ptr->evd_handle)->
104		    evd_ref_count);
105		sp_ptr->evd_handle = NULL;
106	}
107	/*
108	 * Release the base resource if there are no outstanding
109	 * connections; else the last disconnect on this PSP will free it
110	 * up. The PSP is used to contain CR records for each connection,
111	 * which contain information necessary to disconnect.
112	 */
113	if ((sp_ptr->state == DAPL_SP_STATE_PSP_LISTENING) &&
114	    (sp_ptr->cr_list_count == 0)) {
115		sp_ptr->state = DAPL_SP_STATE_FREE;
116		dapl_os_unlock(&sp_ptr->header.lock);
117		dat_status = dapls_ib_remove_conn_listener(ia_ptr, sp_ptr);
118		if (dat_status != DAT_SUCCESS) {
119			/* revert to entry state on error */
120			sp_ptr->state = DAPL_SP_STATE_PSP_LISTENING;
121			goto bail;
122		}
123		dapls_ia_unlink_sp(ia_ptr, sp_ptr);
124		dapls_sp_free_sp(sp_ptr);
125	} else {
126	/*
127	 * The PSP is now in the pending state, where it will sit until
128	 * the last connection terminates or the app uses the same
129	 * ServiceID again, which will reactivate it.
130	 */
131		sp_ptr->state = DAPL_SP_STATE_PSP_PENDING;
132		dapl_os_unlock(&sp_ptr->header.lock);
133	}
134
135bail:
136	return (dat_status);
137}
138