usr/src/cmd/avs/sdbc/sdbc_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  * SDBC user level ioctl interface
  28  */
  29
  30 #include <stdio.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33 #include <sys/types.h>
  34 #include <fcntl.h>
  35 #include <strings.h>
  36
  37 #include <sys/nsctl/sd_cache.h>
  38 #include <sys/nsctl/sd_conf.h>
  39 #include <sys/nsctl/sdbc_ioctl.h>
  40 #include <sys/unistat/spcs_s.h>
  41 #include <sys/unistat/spcs_s_u.h>
  42
  43 #include <sys/nsctl/sv.h>
  44 #include <sys/nsctl/sv_impl.h>
  45
  46
  47 const char *__sdbc_dev = "/dev/sdbc";
  48 static int __sdbc_fd;
  49
  50
  51 static int
  52 __sdbc_open(void)
  53 {
  54         int fd;
  55
  56         fd = open("/dev/nsctl", O_RDONLY);
  57         if (fd >= 0)
  58                 (void) close(fd);
  59
  60         fd = open(__sdbc_dev, O_RDONLY);
  61         if (fd < 0)
  62                 return (-1);
  63
  64         return (__sdbc_fd = fd);
  65 }
  66
  67
  68 static void
  69 sv_list()
  70 {
  71         sv_name_t svn[1];
  72         sv_name_t *svn_system;
  73         sv_list_t svl;
  74         static int fd = -1;
  75
  76         if (fd < 0)
  77                 fd = open(SV_DEVICE, O_RDONLY);
  78         if (fd < 0)
  79                 return;
  80
  81         bzero(&svl, sizeof (svl));
  82         bzero(&svn[0], sizeof (svn));
  83
  84         svl.svl_names = &svn[0];
  85         svl.svl_error = spcs_s_ucreate();
  86
  87         if (ioctl(fd, SVIOC_LIST, &svl) < 0)
  88                 return;
  89
  90         svn_system = calloc(svl.svl_maxdevs, sizeof (*svn));
  91         if (svn_system == NULL)
  92                 return;
  93
  94         /* Grab the system list from the driver */
  95         svl.svl_count = svl.svl_maxdevs;
  96         svl.svl_names = svn_system;
  97
  98         (void) ioctl(fd, SVIOC_LIST, &svl);
  99
 100         free(svn_system);
 101         spcs_s_ufree(&svl.svl_error);
 102 }
 103
 104
 105 int
 106 sdbc_ioctl(long cmd, long a0, long a1, long a2, long a3, long a4,
 107     spcs_s_info_t *ustatus)
 108 {
 109         _sdbc_ioctl_t args;
 110         int rc;
 111
 112         *ustatus = NULL;
 113
 114         if (!__sdbc_fd && __sdbc_open() < 0)
 115                 return (-1);
 116
 117         switch (cmd) {
 118         /*
 119          * These ioctls work on open cache descriptors. The sv_list() function
 120          * has the side-effect of re-opening all configured descriptors.
 121          * Without this call, devices seem to "disappear" from the system when
 122          * certain reconfiguration operations, for example II or SNDR disable,
 123          * are done.
 124          * It does rely on SV being configured, so in an STE-only environment
 125          * the disappearing will still seem to happen.
 126          */
 127         case SDBC_SET_CD_HINT:
 128         case SDBC_GET_CD_HINT:
 129         case SDBC_STATS:
 130         case SDBC_GET_CD_BLK:
 131         case SDBC_INJ_IOERR:
 132         case SDBC_CLR_IOERR:
 133                 sv_list();
 134                 break;
 135
 136         default:
 137                 break;
 138         }
 139
 140         args.arg0 = a0;
 141         args.arg1 = a1;
 142         args.arg2 = a2;
 143         args.arg3 = a3;
 144         args.arg4 = a4;
 145         args.magic = _SD_MAGIC; /* for versioning */
 146         args.sdbc_ustatus = spcs_s_ucreate();
 147
 148         if ((rc = ioctl(__sdbc_fd, cmd, &args)) < 0) {
 149                 *ustatus = args.sdbc_ustatus;
 150         } else {
 151                 spcs_s_ufree(&args.sdbc_ustatus);
 152                 *ustatus = NULL;
 153         }
 154
 155         return (rc);
 156 }