xref: /illumos-gate/usr/src/uts/common/sys/zcons.h (revision 1fa2a66491e7d8ae0be84e7da4da8e812480c710)
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 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SYS_ZCONS_H
27 #define	_SYS_ZCONS_H
28 
29 #include <sys/types.h>
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 /*
36  * Minor node name of the global zone side (often called the "manager" side)
37  * of the zcons driver.
38  */
39 #define	ZCONS_MANAGER_NAME	"globalconsole"
40 
41 /*
42  * Minor node name of the non-global zone side (often called the "subsidiary"
43  * side) of the zcons driver.  We name it "zoneconsole" since that name
44  * will show up in 'ps' output, and will make some sense to the global zone
45  * user.  Inside the zone, it will simply show up as "console" due to the
46  * links we create.
47  */
48 #define	ZCONS_SUBSIDIARY_NAME	"zoneconsole"
49 
50 /*
51  * ZC_IOC forms the base for all zcons ioctls.
52  */
53 #define	ZC_IOC		(('Z' << 24) | ('o' << 16) | ('n' << 8))
54 
55 /*
56  * These ioctls instruct the manager side of the console to hold or release
57  * a reference to the subsidiary side's vnode.  They are meant to be issued by
58  * zoneadmd after the console device node is created and before it is destroyed
59  * so that the subsidiary's STREAMS anchor, ptem, is preserved when ttymon
60  * starts popping STREAMS modules from within the associated zone.  This
61  * guarantees that the zone subsidiary console will always have terminal
62  * semantics while the zone is running.
63  *
64  * A more detailed description can be found in uts/common/io/zcons.c.
65  */
66 #define	ZC_HOLDSUBSID		(ZC_IOC | 0)
67 #define	ZC_RELEASESUBSID	(ZC_IOC | 1)
68 
69 #ifdef	__cplusplus
70 }
71 #endif
72 
73 #endif	/* _SYS_ZCONS_H */
74