usr/src/cmd/avs/rdc/rdc_ioctl.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 /*
  27  * RDC user level ioctl interface
  28  */
  29
  30 #include <stdio.h>
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <fcntl.h>
  34
  35 #include <sys/nsctl/sd_cache.h>
  36 #include <sys/nsctl/sd_conf.h>
  37 #include <sys/nsctl/rdc_ioctl.h>
  38 #include <sys/unistat/spcs_s.h>
  39 #include <sys/unistat/spcs_s_u.h>
  40
  41 const char *__rdc_dev = "/dev/rdc";
  42 static int __rdc_fd;
  43
  44
  45 static int
  46 __rdc_open(void)
  47 {
  48         int fd = open(__rdc_dev, O_RDONLY);
  49
  50         if (fd < 0)
  51                 return (-1);
  52
  53         return (__rdc_fd = fd);
  54 }
  55
  56
  57 int
  58 rdc_ioctl(long cmd, long a0, long a1, long a2, long a3, long a4,
  59         spcs_s_info_t ustatus)
  60 {
  61         _rdc_ioctl_t args;
  62
  63         if (!__rdc_fd && __rdc_open() < 0)
  64                 return (-1);
  65
  66         args.arg0 = a0;
  67         args.arg1 = a1;
  68         args.arg2 = a2;
  69         args.arg3 = a3;
  70         args.arg4 = a4;
  71         args.magic = RDC_MAGIC; /* for versioning */
  72         args.ustatus = ustatus;
  73
  74         return (ioctl(__rdc_fd, cmd, &args));
  75 }
  76
  77 /*
  78  * Simple form of the ioctl, just pass the command and buffer address
  79  * to the kernel.
  80  */
  81 int
  82 rdc_ioctl_simple(long cmd, void *addr)
  83 {
  84         if (!__rdc_fd && __rdc_open() < 0)
  85                 return (-1);
  86         return (ioctl(__rdc_fd, cmd, addr));
  87 }