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linux_ioctl.c revision 1.28 
      1 /*	$NetBSD: linux_ioctl.c,v 1.28 2001/11/13 02:08:53 lukem Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Frank van der Linden and Eric Haszlakiewicz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: linux_ioctl.c,v 1.28 2001/11/13 02:08:53 lukem Exp $");
     41 
     42 #if defined(_KERNEL_OPT)
     43 #include "sequencer.h"
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/proc.h>
     48 #include <sys/systm.h>
     49 #include <sys/conf.h>
     50 #include <sys/ioctl.h>
     51 #include <sys/mount.h>
     52 #include <sys/file.h>
     53 #include <sys/vnode.h>
     54 #include <sys/filedesc.h>
     55 
     56 #include <sys/socket.h>
     57 #include <net/if.h>
     58 #include <sys/sockio.h>
     59 
     60 #include <sys/syscallargs.h>
     61 
     62 #include <compat/linux/common/linux_types.h>
     63 #include <compat/linux/common/linux_signal.h>
     64 #include <compat/linux/common/linux_ioctl.h>
     65 
     66 #include <compat/linux/linux_syscallargs.h>
     67 
     68 #include <compat/ossaudio/ossaudio.h>
     69 #define LINUX_TO_OSS(v) (v)	/* do nothing, same ioctl() encoding */
     70 
     71 /*
     72  * Most ioctl command are just converted to their NetBSD values,
     73  * and passed on. The ones that take structure pointers and (flag)
     74  * values need some massaging. This is done the usual way by
     75  * allocating stackgap memory, letting the actual ioctl call do its
     76  * work there and converting back the data afterwards.
     77  */
     78 int
     79 linux_sys_ioctl(p, v, retval)
     80 	struct proc *p;
     81 	void *v;
     82 	register_t *retval;
     83 {
     84 	struct linux_sys_ioctl_args /* {
     85 		syscallarg(int) fd;
     86 		syscallarg(u_long) com;
     87 		syscallarg(caddr_t) data;
     88 	} */ *uap = v;
     89 
     90 	switch (LINUX_IOCGROUP(SCARG(uap, com))) {
     91 	case 'M':
     92 		return oss_ioctl_mixer(p, LINUX_TO_OSS(v), retval);
     93 	case 'Q':
     94 		return oss_ioctl_sequencer(p, LINUX_TO_OSS(v), retval);
     95 	case 'P':
     96 		return oss_ioctl_audio(p, LINUX_TO_OSS(v), retval);
     97 	case 'S':
     98 		return linux_ioctl_cdrom(p, uap, retval);
     99 	case 't':
    100 	case 'f':
    101 		return linux_ioctl_termios(p, uap, retval);
    102 	case 'T':
    103 	{
    104 #if NSEQUENCER > 0
    105 /* XXX XAX 2x check this. */
    106 		/*
    107 		 * Both termios and the MIDI sequncer use 'T' to identify
    108 		 * the ioctl, so we have to differentiate them in another
    109 		 * way.  We do it by indexing in the cdevsw with the major
    110 		 * device number and check if that is the sequencer entry.
    111 		 */
    112 		struct file *fp;
    113 		struct filedesc *fdp;
    114 		struct vnode *vp;
    115 		struct vattr va;
    116 		extern int sequencerioctl
    117 			__P((dev_t, u_long, caddr_t, int, struct proc *));
    118 
    119 		fdp = p->p_fd;
    120 		if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
    121 			return EBADF;
    122 		if (fp->f_type == DTYPE_VNODE &&
    123 		    (vp = (struct vnode *)fp->f_data) != NULL &&
    124 		    vp->v_type == VCHR &&
    125 		    VOP_GETATTR(vp, &va, p->p_ucred, p) == 0 &&
    126 		    major(va.va_rdev) < nchrdev &&
    127 		    cdevsw[major(va.va_rdev)].d_ioctl == &sequencerioctl)
    128 			return oss_ioctl_sequencer(p, (void*)LINUX_TO_OSS(uap),
    129 						   retval);
    130 		else
    131 #endif
    132 			return linux_ioctl_termios(p, uap, retval);
    133 	}
    134 	case 0x89:
    135 		return linux_ioctl_socket(p, uap, retval);
    136 	case 0x03:
    137 		return linux_ioctl_hdio(p, uap, retval);
    138 	case 0x02:
    139 		return linux_ioctl_fdio(p, uap, retval);
    140 	case 0x12:
    141 		return linux_ioctl_blkio(p, uap, retval);
    142 	default:
    143 		return linux_machdepioctl(p, uap, retval);
    144 	}
    145 }
    146