include/sys/zcons.h

   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 "master" side)
  37  * of the zcons driver.
  38  */
  39 #define ZCONS_MASTER_NAME       "masterconsole"
  40
  41 /*
  42  * Minor node name of the non-global zone side (often called the "slave"
  43  * side) of the zcons driver.  We name it "zoneconsole" since that nameo
  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_SLAVE_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 master side of the console to hold or release
  57  * a reference to the slave 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 slave's STREAMS anchor, ptem, is preserved when ttymon starts
  60  * popping STREAMS modules from within the associated zone.  This guarantees
  61  * that the zone slave console will always have terminal semantics while the
  62  * zone is running.
  63  *
  64  * A more detailed description can be found in uts/common/io/zcons.c.
  65  */
  66 #define ZC_HOLDSLAVE    (ZC_IOC | 0)    /* get and save slave side reference */
  67 #define ZC_RELEASESLAVE (ZC_IOC | 1)    /* release slave side reference */
  68
  69 #ifdef  __cplusplus
  70 }
  71 #endif
  72
  73 #endif  /* _SYS_ZCONS_H */