xref: /illumos-gate/usr/src/lib/sun_sas/common/Sun_sasCloseAdapter.c (revision 9e86db79b7d1bbc5f2f04e99954cbd5eae0e22bb)
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 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include    <sun_sas.h>
28 
29 /*
30  * Closes an adapter
31  *
32  * the handle is removed from the open_handles list
33  */
34 void
Sun_sasCloseAdapter(HBA_HANDLE handle)35 Sun_sasCloseAdapter(HBA_HANDLE handle)
36 {
37 	const char			ROUTINE[] = "Sun_sasCloseAdapter";
38 	struct open_handle		*open_handle_ptr, *open_handle_prev_ptr;
39 	int				found = 0;
40 
41 	if (global_hba_head == NULL) {
42 		log(LOG_DEBUG, ROUTINE,
43 		    "Attempted to close an invalid handle %08lx. "
44 		    "There are no hba handles loaded in the VSL.",
45 		    handle);
46 		return;
47 	}
48 
49 	/* Removing handle from open_handles; */
50 	lock(&open_handles_lock);
51 	if (global_hba_head->open_handles == NULL) {
52 		/* check to see if there are any open global_hba_head */
53 		log(LOG_DEBUG, ROUTINE,
54 		    "Attempted to close an invalid handle %08lx. "
55 		    "There are no open handles in the VSL.",
56 		    handle);
57 	} else if (global_hba_head->open_handles->next == NULL) {
58 		/* there is only one handle open */
59 		if (global_hba_head->open_handles->handle == handle) {
60 			free(global_hba_head->open_handles);
61 			global_hba_head->open_handles = NULL;
62 		} else {
63 			log(LOG_DEBUG, ROUTINE,
64 			    "Attempted to close an invalid handle %08lx. "
65 			    "Unable to find handle to close.", handle);
66 		}
67 	} else {	/* there is more than one handle open */
68 		open_handle_ptr = global_hba_head->open_handles;
69 		if (open_handle_ptr->handle == handle) {
70 			global_hba_head->open_handles = open_handle_ptr->next;
71 			free(open_handle_ptr);
72 		} else {
73 			for (open_handle_ptr = open_handle_ptr->next,
74 			    open_handle_prev_ptr =
75 			    global_hba_head->open_handles;
76 			    open_handle_ptr != NULL;
77 			    open_handle_ptr = open_handle_ptr->next) {
78 				if (open_handle_ptr->handle == handle) {
79 					open_handle_prev_ptr->next =
80 					    open_handle_ptr->next;
81 					free(open_handle_ptr);
82 					found = 1;
83 					break;
84 				} else {
85 					open_handle_prev_ptr =
86 					    open_handle_prev_ptr->next;
87 				}
88 			}
89 			if (found == 0) {
90 				log(LOG_DEBUG, ROUTINE,
91 				    "Attempted to close an invalid handle "
92 				    "%08lx.  Unable to find handle to close.",
93 				    handle);
94 			}
95 		}
96 	}
97 
98 	unlock(&open_handles_lock);
99 }
100