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 */
64 DAT_RETURN
dapl_rsp_free(IN DAT_RSP_HANDLE rsp_handle)65 dapl_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
141 bail:
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