usr/src/cmd/vscan/vscand/vs_door.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
  29 /*
  30  * vscand door server
  31  */
  32
  33 #include <door.h>
  34 #include <errno.h>
  35 #include <syslog.h>
  36 #include <unistd.h>
  37 #include <varargs.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <synch.h>
  42 #include <fcntl.h>
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #include <sys/param.h>
  46 #include <pthread.h>
  47 #include "vs_incl.h"
  48
  49 #define VS_DOOR_VERSION 1
  50 static int vs_door_cookie;
  51
  52 /* function prototype */
  53 static void vs_door_scan_req(void *, char *, size_t, door_desc_t *, uint_t);
  54
  55 /* local data */
  56 static int vs_door_fd = -1;
  57 static pthread_mutex_t vs_door_mutex = PTHREAD_MUTEX_INITIALIZER;
  58
  59
  60 /*
  61  * vs_door_init
  62  *
  63  * Start the vscand door service.
  64  * Returns 0 on success. Otherwise, -1.
  65  */
  66 int
  67 vs_door_init(void)
  68 {
  69         (void) pthread_mutex_lock(&vs_door_mutex);
  70
  71         if ((vs_door_fd = door_create(vs_door_scan_req,
  72             &vs_door_cookie, (DOOR_UNREF | DOOR_REFUSE_DESC))) < 0) {
  73                 syslog(LOG_ERR, "vscand: door create%s", strerror(errno));
  74                 vs_door_fd = -1;
  75         }
  76
  77         (void) pthread_mutex_unlock(&vs_door_mutex);
  78         return (vs_door_fd);
  79 }
  80
  81
  82 /*
  83  * vscan_door_fini
  84  *
  85  * Stop the vscand door service.
  86  */
  87 void
  88 vs_door_fini(void)
  89 {
  90         (void) pthread_mutex_lock(&vs_door_mutex);
  91
  92         if (vs_door_fd >= 0) {
  93                 if (door_revoke(vs_door_fd) < 0)
  94                         syslog(LOG_ERR, "vscand: door revoke %s",
  95                             strerror(errno));
  96         }
  97
  98         vs_door_fd = -1;
  99
 100         (void) pthread_mutex_unlock(&vs_door_mutex);
 101 }
 102
 103
 104 /*
 105  * vs_door_scan_req
 106  *
 107  * Invoke the vscand door service.
 108  */
 109 /* ARGSUSED */
 110 static void
 111 vs_door_scan_req(void *cookie, char *ptr, size_t size, door_desc_t *dp,
 112     uint_t n_desc)
 113 {
 114         vs_scan_req_t *scan_req;
 115         uint32_t result = VS_STATUS_ERROR;
 116
 117         if (ptr != NULL) {
 118                 /* LINTED E_BAD_PTR_CAST_ALIGN - to be fixed with encoding */
 119                 scan_req = (vs_scan_req_t *)ptr;
 120                 result = vs_svc_queue_scan_req(scan_req);
 121         }
 122
 123         (void) door_return((char *)&result, sizeof (uint32_t), NULL, 0);
 124 }