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 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 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 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 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