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      1 /*	$NetBSD: freebsd_ioctl.c,v 1.15 2007/12/20 23:02:47 dsl Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Frank van der Linden
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed for the NetBSD Project
     18  *      by Frank van der Linden
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: freebsd_ioctl.c,v 1.15 2007/12/20 23:02:47 dsl Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/proc.h>
     40 #include <sys/mount.h>
     41 #include <sys/sockio.h>
     42 
     43 #include <sys/syscallargs.h>
     44 
     45 #include <net/if.h>
     46 
     47 #include <compat/sys/sockio.h>
     48 
     49 #include <compat/freebsd/freebsd_syscallargs.h>
     50 #include <compat/common/compat_util.h>
     51 #include <compat/freebsd/freebsd_ioctl.h>
     52 
     53 #include <compat/ossaudio/ossaudio.h>
     54 #include <compat/ossaudio/ossaudiovar.h>
     55 
     56 /* The FreeBSD and OSS(Linux) encodings of ioctl R/W differ. */
     57 static void freebsd_to_oss(const struct freebsd_sys_ioctl_args *,
     58 			   struct oss_sys_ioctl_args *);
     59 
     60 static void
     61 freebsd_to_oss(const struct freebsd_sys_ioctl_args *uap, struct oss_sys_ioctl_args *rap)
     62 {
     63 	u_long ocmd, ncmd;
     64 
     65         ocmd = SCARG(uap, com);
     66         ncmd = ocmd &~ FREEBSD_IOC_DIRMASK;
     67 	switch(ocmd & FREEBSD_IOC_DIRMASK) {
     68         case FREEBSD_IOC_VOID:  ncmd |= OSS_IOC_VOID;  break;
     69         case FREEBSD_IOC_OUT:   ncmd |= OSS_IOC_OUT;   break;
     70         case FREEBSD_IOC_IN:    ncmd |= OSS_IOC_IN;    break;
     71         case FREEBSD_IOC_INOUT: ncmd |= OSS_IOC_INOUT; break;
     72         }
     73         SCARG(rap, fd) = SCARG(uap, fd);
     74         SCARG(rap, com) = ncmd;
     75         SCARG(rap, data) = SCARG(uap, data);
     76 }
     77 
     78 
     79 static void freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap,
     80 				      struct sys_ioctl_args *nap);
     81 
     82 static void
     83 freebsd_to_netbsd_ifioctl(const struct freebsd_sys_ioctl_args *uap, struct sys_ioctl_args *nap)
     84 {
     85 	u_long ocmd, ncmd;
     86 	ocmd = SCARG(uap, com);
     87 	switch (ocmd) {
     88 	case FREEBSD_SIOCALIFADDR:
     89 		ncmd =SIOCALIFADDR;
     90 		break;
     91 	case FREEBSD_SIOCGLIFADDR:
     92 		ncmd =SIOCGLIFADDR;
     93 		break;
     94 	case FREEBSD_SIOCDLIFADDR:
     95 		ncmd =SIOCDLIFADDR;
     96 		break;
     97 	case FREEBSD_SIOCGIFMTU:
     98 		ncmd = SIOCGIFMTU;
     99 		break;
    100 	case FREEBSD_SIOCSIFMTU:
    101 		ncmd = SIOCSIFMTU;
    102 		break;
    103 	default:
    104 		ncmd = ocmd;
    105 		break;
    106 	}
    107 	SCARG(nap, fd) = SCARG(uap, fd);
    108 	SCARG(nap, com) = ncmd;
    109 	SCARG(nap, data) = SCARG(uap, data);
    110 }
    111 
    112 int
    113 freebsd_sys_ioctl(struct lwp *l, const struct freebsd_sys_ioctl_args *uap, register_t *retval)
    114 {
    115 	/* {
    116 		syscallarg(int) fd;
    117 		syscallarg(u_long) com;
    118 		syscallarg(void *) data;
    119 	} */
    120         struct oss_sys_ioctl_args ap;
    121 	struct sys_ioctl_args nap;
    122 
    123 	/*
    124 	 * XXX - <sys/cdio.h>'s incompatibility
    125 	 *	_IO('c', 25..27, *):	incompatible
    126 	 *	_IO('c', 28... , *):	not exist
    127 	 */
    128 	/* XXX - <sys/mtio.h> */
    129 	/* XXX - <sys/scsiio.h> */
    130 	/* XXX - should convert machine dependent ioctl()s */
    131 
    132 	switch (FREEBSD_IOCGROUP(SCARG(uap, com))) {
    133 	case 'M':
    134         	freebsd_to_oss(uap, &ap);
    135 		return oss_ioctl_mixer(l, &ap, retval);
    136 	case 'Q':
    137         	freebsd_to_oss(uap, &ap);
    138 		return oss_ioctl_sequencer(l, &ap, retval);
    139 	case 'P':
    140         	freebsd_to_oss(uap, &ap);
    141 		return oss_ioctl_audio(l, &ap, retval);
    142 	case 'i':
    143 		freebsd_to_netbsd_ifioctl(uap, &nap);
    144 		return sys_ioctl(l, &nap, retval);
    145 	default:
    146 		return sys_ioctl(l, (const void *)uap, retval);
    147 	}
    148 }
    149