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 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <sys/types.h>
26 #include <sys/param.h>
27 #include <sys/termios.h>
28 #include <sys/stream.h>
29 #include <sys/stropts.h>
30 #include <sys/kmem.h>
31 #include <sys/stat.h>
32 #include <sys/sunddi.h>
33 #include <sys/ddi.h>
34 #include <sys/bitmap.h>
35 #include <sys/sysmacros.h>
36 #include <sys/ddi_impldefs.h>
37 #include <sys/zone.h>
38 #include <sys/thread.h>
39 #ifdef DEBUG
40 #include <sys/strlog.h>
41 #endif
42
43 #include <sys/consdev.h>
44 #include <sys/console.h>
45 #include <sys/wscons.h>
46 #include <sys/vt_impl.h>
47 #include <sys/note.h>
48 #include <sys/avl.h>
49
50 /* set if console driver is attached */
51 dev_info_t *wc_dip = NULL;
52 /* active virtual console minor number */
53 minor_t vc_active_console = VT_MINOR_INVALID;
54 /*
55 * console_user symbol link minor number.
56 * VT_MINOR_INVALID : /dev/console
57 * N : /dev/vt/N
58 */
59 minor_t vc_cons_user = VT_MINOR_INVALID;
60 /* vc_state_t AVL tree */
61 avl_tree_t vc_avl_root;
62 /* virtual console global lock */
63 kmutex_t vc_lock;
64
_NOTE(MUTEX_PROTECTS_DATA (vc_lock,wc_dip vc_avl_root vc_active_console vc_cons_user))65 _NOTE(MUTEX_PROTECTS_DATA(vc_lock, wc_dip vc_avl_root vc_active_console
66 vc_cons_user))
67
68 /*
69 * Called from vt devname part. Checks if dip is attached. If it is,
70 * return its major number.
71 */
72 major_t
73 vt_wc_attached(void)
74 {
75 major_t maj = (major_t)-1;
76
77 mutex_enter(&vc_lock);
78
79 if (wc_dip)
80 maj = ddi_driver_major(wc_dip);
81
82 mutex_exit(&vc_lock);
83
84 return (maj);
85 }
86
87 void
vt_getactive(char * buf,int buflen)88 vt_getactive(char *buf, int buflen)
89 {
90 ASSERT(buf);
91 ASSERT(buflen != 0);
92
93 mutex_enter(&vc_lock);
94
95 if (vc_active_console == 0 || vc_active_console == VT_MINOR_INVALID)
96 (void) snprintf(buf, buflen, "/dev/console");
97 else
98 (void) snprintf(buf, buflen, "%u", vc_active_console);
99
100 mutex_exit(&vc_lock);
101 }
102
103 void
vt_getconsuser(char * buf,int buflen)104 vt_getconsuser(char *buf, int buflen)
105 {
106 ASSERT(buf);
107 ASSERT(buflen != 0);
108
109 mutex_enter(&vc_lock);
110
111 if (vc_cons_user == VT_MINOR_INVALID) {
112 (void) snprintf(buf, buflen, "/dev/console");
113 mutex_exit(&vc_lock);
114 return;
115 }
116
117 (void) snprintf(buf, buflen, "%u", vc_cons_user);
118 mutex_exit(&vc_lock);
119 }
120
121 boolean_t
vt_minor_valid(minor_t minor)122 vt_minor_valid(minor_t minor)
123 {
124 if (consmode == CONS_FW) {
125 if (minor == 0)
126 return (B_TRUE);
127
128 return (B_FALSE);
129 }
130
131 mutex_enter(&vc_lock);
132 if (minor < VC_INSTANCES_COUNT) {
133 mutex_exit(&vc_lock);
134 return (B_TRUE);
135 }
136
137 mutex_exit(&vc_lock);
138 return (B_FALSE);
139
140 }
141