FreeBSD/Linux Kernel Cross Reference
sys/dev/amr/amr_linux.c

     /*-
      * Copyright (c) 2005 Paul Saab
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.2/sys/dev/amr/amr_linux.c 331722 2018-03-29 02:50:57Z eadler $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/capsicum.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/file.h>
    #include <sys/proc.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>
    
    /* There are multiple ioctl number ranges that need to be handled */
    #define AMR_LINUX_IOCTL_MIN  0x6d00
    #define AMR_LINUX_IOCTL_MAX  0x6d01
    
    static linux_ioctl_function_t amr_linux_ioctl;
    static struct linux_ioctl_handler amr_linux_handler = {amr_linux_ioctl,
                                                           AMR_LINUX_IOCTL_MIN,
                                                           AMR_LINUX_IOCTL_MAX};
    
    SYSINIT  (amr_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
              linux_ioctl_register_handler, &amr_linux_handler);
    SYSUNINIT(amr_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
              linux_ioctl_unregister_handler, &amr_linux_handler);
    
    static int
    amr_linux_modevent(module_t mod, int cmd, void *data)
    {
            return (0);
    }
    
    DEV_MODULE(amr_linux, amr_linux_modevent, NULL);
    MODULE_DEPEND(amr, linux, 1, 1, 1);
    
    static int
    amr_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
    {
            cap_rights_t rights;
            struct file *fp;
            int error;
    
            error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
            if (error != 0)
                    return (error);
            error = fo_ioctl(fp, args->cmd, (caddr_t)args->arg, p->td_ucred, p);
            fdrop(fp, p);
            return (error);
    }

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