sdbc_ioctl.c revision fcf3ce441efd61da9bb2884968af01cb7c1452cc
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* SDBC user level ioctl interface
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <strings.h>
#include <sys/nsctl/sd_cache.h>
#include <sys/nsctl/sd_conf.h>
#include <sys/nsctl/sdbc_ioctl.h>
#include <sys/unistat/spcs_s.h>
#include <sys/unistat/spcs_s_u.h>
#include <sys/nsctl/sv.h>
#include <sys/nsctl/sv_impl.h>
const char *__sdbc_dev = "/dev/sdbc";
static int __sdbc_fd;
static int
__sdbc_open(void)
{
int fd;
fd = open("/dev/nsctl", O_RDONLY);
if (fd >= 0)
(void) close(fd);
fd = open(__sdbc_dev, O_RDONLY);
if (fd < 0)
return (-1);
return (__sdbc_fd = fd);
}
static void
sv_list()
{
sv_name_t svn[1];
sv_name_t *svn_system;
sv_list_t svl;
static int fd = -1;
if (fd < 0)
fd = open(SV_DEVICE, O_RDONLY);
if (fd < 0)
return;
bzero(&svl, sizeof (svl));
bzero(&svn[0], sizeof (svn));
svl.svl_names = &svn[0];
svl.svl_error = spcs_s_ucreate();
if (ioctl(fd, SVIOC_LIST, &svl) < 0)
return;
svn_system = calloc(svl.svl_maxdevs, sizeof (*svn));
if (svn_system == NULL)
return;
/* Grab the system list from the driver */
svl.svl_count = svl.svl_maxdevs;
svl.svl_names = svn_system;
(void) ioctl(fd, SVIOC_LIST, &svl);
free(svn_system);
spcs_s_ufree(&svl.svl_error);
}
int
sdbc_ioctl(long cmd, long a0, long a1, long a2, long a3, long a4,
spcs_s_info_t *ustatus)
{
_sdbc_ioctl_t args;
int rc;
*ustatus = NULL;
if (!__sdbc_fd && __sdbc_open() < 0)
return (-1);
switch (cmd) {
/*
* These ioctls work on open cache descriptors. The sv_list() function
* has the side-effect of re-opening all configured descriptors.
* Without this call, devices seem to "disappear" from the system when
* certain reconfiguration operations, for example II or SNDR disable,
* are done.
* It does rely on SV being configured, so in an STE-only environment
* the disappearing will still seem to happen.
*/
case SDBC_SET_CD_HINT:
case SDBC_GET_CD_HINT:
case SDBC_STATS:
case SDBC_GET_CD_BLK:
case SDBC_INJ_IOERR:
case SDBC_CLR_IOERR:
sv_list();
break;
default:
break;
}
args.arg0 = a0;
args.arg1 = a1;
args.arg2 = a2;
args.arg3 = a3;
args.arg4 = a4;
args.magic = _SD_MAGIC; /* for versioning */
args.sdbc_ustatus = spcs_s_ucreate();
if ((rc = ioctl(__sdbc_fd, cmd, &args)) < 0) {
*ustatus = args.sdbc_ustatus;
} else {
spcs_s_ufree(&args.sdbc_ustatus);
*ustatus = NULL;
}
return (rc);
}