The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/aac/aac_linux.c

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    1 /*-
    2  * Copyright (c) 2002 Scott Long
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 /*
   31  * Linux ioctl handler for the aac device driver
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/conf.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/file.h>
   40 #include <sys/proc.h>
   41 #include <machine/../linux/linux.h>
   42 #include <machine/../linux/linux_proto.h>
   43 #include <compat/linux/linux_ioctl.h>
   44 
   45 /* There are multiple ioctl number ranges that need to be handled */
   46 #define AAC_LINUX_IOCTL_MIN  0x0000
   47 #define AAC_LINUX_IOCTL_MAX  0x21ff
   48 
   49 static linux_ioctl_function_t aac_linux_ioctl;
   50 static struct linux_ioctl_handler aac_linux_handler = {aac_linux_ioctl,
   51                                                        AAC_LINUX_IOCTL_MIN,
   52                                                        AAC_LINUX_IOCTL_MAX};
   53 
   54 SYSINIT  (aac_linux_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
   55           linux_ioctl_register_handler, &aac_linux_handler);
   56 SYSUNINIT(aac_linux_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
   57           linux_ioctl_unregister_handler, &aac_linux_handler);
   58 
   59 static int
   60 aac_linux_modevent(module_t mod, int type, void *data)
   61 {
   62         /* Do we care about any specific load/unload actions? */
   63         return (0);
   64 }
   65 
   66 DEV_MODULE(aac_linux, aac_linux_modevent, NULL);
   67 MODULE_DEPEND(aac_linux, linux, 1, 1, 1);
   68 
   69 static int
   70 aac_linux_ioctl(struct thread *td, struct linux_ioctl_args *args)
   71 {
   72         struct file *fp;
   73         u_long cmd;
   74         int error;
   75 
   76         if ((error = fget(td, args->fd, &fp)) != 0)
   77                 return (error);
   78         cmd = args->cmd;
   79 
   80         /*
   81          * Pass the ioctl off to our standard handler.
   82          */
   83         error = (fo_ioctl(fp, cmd, (caddr_t)args->arg, td->td_ucred, td));
   84         fdrop(fp, td);
   85         return (error);
   86 }

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