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/mfi/mfi_linux.c

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    1 /*-
    2  * Copyright (c) 2006 IronPort Systems
    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: releng/10.0/sys/dev/mfi/mfi_linux.c 255219 2013-09-05 00:09:56Z pjd $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/capability.h>
   33 #include <sys/conf.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/file.h>
   37 #include <sys/proc.h>
   38 #include <machine/bus.h>
   39 
   40 #if defined(__amd64__) /* Assume amd64 wants 32 bit Linux */
   41 #include <machine/../linux32/linux.h>
   42 #include <machine/../linux32/linux32_proto.h>
   43 #else
   44 #include <machine/../linux/linux.h>
   45 #include <machine/../linux/linux_proto.h>
   46 #endif
   47 #include <compat/linux/linux_ioctl.h>
   48 #include <compat/linux/linux_util.h>
   49 
   50 #include <dev/mfi/mfireg.h>
   51 #include <dev/mfi/mfi_ioctl.h>
   52 
   53 /* There are multiple ioctl number ranges that need to be handled */
   54 #define MFI_LINUX_IOCTL_MIN  0x4d00
   55 #define MFI_LINUX_IOCTL_MAX  0x4d04
   56 
   57 static linux_ioctl_function_t mfi_linux_ioctl;
   58 static struct linux_ioctl_handler mfi_linux_handler = {mfi_linux_ioctl,
   59                                                        MFI_LINUX_IOCTL_MIN,
   60                                                        MFI_LINUX_IOCTL_MAX};
   61 
   62 SYSINIT  (mfi_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
   63           linux_ioctl_register_handler, &mfi_linux_handler);
   64 SYSUNINIT(mfi_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
   65           linux_ioctl_unregister_handler, &mfi_linux_handler);
   66 
   67 static struct linux_device_handler mfi_device_handler =
   68         { "mfi", "megaraid_sas", "mfi0", "megaraid_sas_ioctl_node", -1, 0, 1};
   69 
   70 SYSINIT  (mfi_register2,   SI_SUB_KLD, SI_ORDER_MIDDLE,
   71           linux_device_register_handler, &mfi_device_handler);
   72 SYSUNINIT(mfi_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
   73           linux_device_unregister_handler, &mfi_device_handler);
   74 
   75 static int
   76 mfi_linux_modevent(module_t mod, int cmd, void *data)
   77 {
   78         return (0);
   79 }
   80 
   81 DEV_MODULE(mfi_linux, mfi_linux_modevent, NULL);
   82 MODULE_DEPEND(mfi, linux, 1, 1, 1);
   83 
   84 static int
   85 mfi_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
   86 {
   87         cap_rights_t rights;
   88         struct file *fp;
   89         int error;
   90         u_long cmd = args->cmd;
   91 
   92         switch (cmd) {
   93         case MFI_LINUX_CMD:
   94                 cmd = MFI_LINUX_CMD_2;
   95                 break;
   96         case MFI_LINUX_SET_AEN:
   97                 cmd = MFI_LINUX_SET_AEN_2;
   98                 break;
   99         }
  100 
  101         error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
  102         if (error != 0)
  103                 return (error);
  104         error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
  105         fdrop(fp, p);
  106         return (error);
  107 }

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