freebsd-skq/sys/dev/mrsas/mrsas_linux.c

/*
 * Copyright (c) 2014, LSI Corp.
 * All rights reserved.
 * Author: Kashyap Desai, Sibananda Sahu
 * Support: freebsdraid@lsi.com
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the <ORGANIZATION> nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation
 * are those of the authors and should not be interpreted as representing
 * official policies,either expressed or implied, of the FreeBSD Project.
 *
 * Send feedback to: <megaraidfbsd@lsi.com>
 * Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
 *    ATTN: MegaRaid FreeBSD
 *
 * $FreeBSD$
 */

#include <sys/cdefs.h>

#include <sys/param.h>
#include <sys/systm.h>

#if (__FreeBSD_version > 900000)
#include <sys/capability.h>
#endif

#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/file.h>
#include <sys/proc.h>
#include <machine/bus.h>

#if defined(__amd64__) /* Assume amd64 wants 32 bit Linux */
#include <machine/../linux32/linux.h>
#include <machine/../linux32/linux32_proto.h>
#else
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#endif
#include <compat/linux/linux_ioctl.h>
#include <compat/linux/linux_util.h>

#include <dev/mrsas/mrsas.h>
#include <dev/mrsas/mrsas_ioctl.h>

/* There are multiple ioctl number ranges that need to be handled */
#define MRSAS_LINUX_IOCTL_MIN  0x4d00
#define MRSAS_LINUX_IOCTL_MAX  0x4d01

static linux_ioctl_function_t mrsas_linux_ioctl;
static struct linux_ioctl_handler mrsas_linux_handler = {mrsas_linux_ioctl,
						       MRSAS_LINUX_IOCTL_MIN,
						       MRSAS_LINUX_IOCTL_MAX};

SYSINIT  (mrsas_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
	  linux_ioctl_register_handler, &mrsas_linux_handler);
SYSUNINIT(mrsas_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
	  linux_ioctl_unregister_handler, &mrsas_linux_handler);

static struct linux_device_handler mrsas_device_handler =
	{ "mrsas", "megaraid_sas", "mrsas0", "megaraid_sas_ioctl_node", -1, 0, 1};

SYSINIT  (mrsas_register2,   SI_SUB_KLD, SI_ORDER_MIDDLE,
	  linux_device_register_handler, &mrsas_device_handler);
SYSUNINIT(mrsas_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
	  linux_device_unregister_handler, &mrsas_device_handler);

static int
mrsas_linux_modevent(module_t mod __unused, int cmd __unused, void *data __unused)
{
	return (0);
}

static int
mrsas_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
{
	#if (__FreeBSD_version >= 1000000)
	cap_rights_t rights;
	#endif
	struct file *fp;
	int error;
	u_long cmd = args->cmd;

	if (cmd != MRSAS_LINUX_CMD32){
		error = ENOTSUP;
		goto END;
	}

	#if (__FreeBSD_version >= 1000000)
	error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
	#elif (__FreeBSD_version <= 900000)
	error = fget(p, args->fd, &fp);
	#else	/* For FreeBSD version greater than 9.0.0 but less than 10.0.0 */
	error = fget(p, args->fd, CAP_IOCTL, &fp);
	#endif
	if (error != 0)
		goto END;

	error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
	fdrop(fp, p);
END:
	return (error);
}

DEV_MODULE(mrsas_linux, mrsas_linux_modevent, NULL);
MODULE_DEPEND(mrsas, linux, 1, 1, 1);