usr/src/cmd/devfsadm/dtrace_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 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <devfsadm.h>
  27 #include <strings.h>
  28 #include <stdio.h>
  29 #include <sys/dtrace.h>
  30
  31 static int dtrace(di_minor_t minor, di_node_t node);
  32 static int dtrace_provider(di_minor_t minor, di_node_t node);
  33
  34 static devfsadm_create_t dtrace_create_cbt[] = {
  35         { "pseudo", "ddi_pseudo", "dtrace",
  36             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace },
  37         { "pseudo", "ddi_pseudo", "fasttrap",
  38             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  39         { "pseudo", "ddi_pseudo", "fbt",
  40             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  41         { "pseudo", "ddi_pseudo", "lockstat",
  42             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  43         { "pseudo", "ddi_pseudo", "profile",
  44             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  45         { "pseudo", "ddi_pseudo", "sdt",
  46             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  47         { "pseudo", "ddi_pseudo", "systrace",
  48             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  49         { "pseudo", "ddi_pseudo", "dcpc",
  50             TYPE_EXACT | DRV_EXACT, ILEVEL_0, dtrace_provider },
  51 };
  52
  53 DEVFSADM_CREATE_INIT_V0(dtrace_create_cbt);
  54
  55 static int
  56 dtrace(di_minor_t minor, di_node_t node)
  57 {
  58         char *mname = di_minor_name(minor);
  59         char path[MAXPATHLEN];
  60
  61         (void) snprintf(path, sizeof (path), "dtrace/%s", mname);
  62         (void) devfsadm_mklink(path, node, minor, 0);
  63
  64         return (DEVFSADM_CONTINUE);
  65 }
  66
  67 static int
  68 dtrace_provider(di_minor_t minor, di_node_t node)
  69 {
  70         char *mname = di_minor_name(minor);
  71         char path[MAXPATHLEN];
  72
  73         (void) snprintf(path, sizeof (path), "dtrace/provider/%s", mname);
  74         (void) devfsadm_mklink(path, node, minor, 0);
  75
  76         return (DEVFSADM_CONTINUE);
  77 }