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
65 DAT_RETURN
dapl_psp_free(IN DAT_PSP_HANDLE psp_handle)66 dapl_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
135 bail:
136 return (dat_status);
137 }
138