usr/src/cmd/devfsadm/i386/xen_link.c

   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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <regex.h>
  29 #include <devfsadm.h>
  30 #include <stdio.h>
  31 #include <strings.h>
  32 #include <stdlib.h>
  33 #include <limits.h>
  34 #include <sys/privcmd_impl.h>
  35 #include <sys/domcaps_impl.h>
  36 #include <sys/balloon.h>
  37
  38 /*
  39  * Handle miscellaneous children of xendev
  40  */
  41 static int devxen(di_minor_t, di_node_t);
  42 static int xdt(di_minor_t minor, di_node_t node);
  43
  44 static devfsadm_create_t xen_cbt[] = {
  45         { "xendev", DDI_PSEUDO, "xenbus",
  46             TYPE_EXACT | DRV_EXACT, ILEVEL_0, devxen,
  47         },
  48         { "xendev", DDI_PSEUDO, PRIVCMD_DRIVER_NAME,
  49             TYPE_EXACT | DRV_EXACT, ILEVEL_0, devxen,
  50         },
  51         { "xendev", DDI_PSEUDO, "evtchn",
  52             TYPE_EXACT | DRV_EXACT, ILEVEL_0, devxen,
  53         },
  54         { "xendev", DDI_PSEUDO, DOMCAPS_DRIVER_NAME,
  55             TYPE_EXACT | DRV_EXACT, ILEVEL_0, devxen,
  56         },
  57         { "xendev", DDI_PSEUDO, BALLOON_DRIVER_NAME,
  58             TYPE_EXACT | DRV_EXACT, ILEVEL_0, devxen,
  59         },
  60         { "pseudo", DDI_PSEUDO, "xdt",
  61             TYPE_EXACT | DRV_EXACT, ILEVEL_0, xdt
  62         },
  63 };
  64
  65 DEVFSADM_CREATE_INIT_V0(xen_cbt);
  66
  67 static devfsadm_remove_t xen_remove_cbt[] = {
  68         { "xendev", "^" "xen/xenbus" "$", RM_ALWAYS | RM_PRE | RM_HOT,
  69             ILEVEL_0, devfsadm_rm_all
  70         },
  71         { "xendev", "^" PRIVCMD_PATHNAME "$", RM_ALWAYS | RM_PRE | RM_HOT,
  72             ILEVEL_0, devfsadm_rm_all
  73         },
  74         { "xendev", "^" "xen/evtchn" "$", RM_ALWAYS | RM_PRE | RM_HOT,
  75             ILEVEL_0, devfsadm_rm_all
  76         },
  77         { "xendev", "^" DOMCAPS_PATHNAME "$", RM_ALWAYS | RM_PRE | RM_HOT,
  78             ILEVEL_0, devfsadm_rm_all
  79         },
  80         { "xendev", "^" BALLOON_PATHNAME "$", RM_ALWAYS | RM_PRE | RM_HOT,
  81             ILEVEL_0, devfsadm_rm_all
  82         },
  83 };
  84
  85 DEVFSADM_REMOVE_INIT_V0(xen_remove_cbt);
  86
  87 /*
  88  * /dev/xen/<foo>       ->      /devices/xendev/<whatever>:<foo>
  89  */
  90 static int
  91 devxen(di_minor_t minor, di_node_t node)
  92 {
  93         char buf[256];
  94
  95         (void) snprintf(buf, sizeof (buf), "xen/%s", di_minor_name(minor));
  96         (void) devfsadm_mklink(buf, node, minor, 0);
  97
  98         return (DEVFSADM_CONTINUE);
  99 }
 100
 101 static int
 102 xdt(di_minor_t minor, di_node_t node)
 103 {
 104         char *mname = di_minor_name(minor);
 105         char path[MAXPATHLEN];
 106
 107         (void) snprintf(path, sizeof (path), "dtrace/provider/%s", mname);
 108         (void) devfsadm_mklink(path, node, minor, 0);
 109
 110         return (DEVFSADM_CONTINUE);
 111 }