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      1 /*	$NetBSD: ccd_60.c,v 1.11 2019/12/12 02:15:42 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: ccd_60.c,v 1.11 2019/12/12 02:15:42 pgoyette Exp $");
     30 
     31 #ifdef _KERNEL_OPT
     32 #include "opt_compat_netbsd.h"
     33 #endif
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/disk.h>
     38 #include <sys/lwp.h>
     39 #include <sys/compat_stub.h>
     40 
     41 #include <dev/ccdvar.h>
     42 #include <compat/sys/ccdvar.h>
     43 
     44 /*
     45  * Compat code must not be called if on a platform where
     46  * sizeof (size_t) == sizeof (uint64_t) as CCDIOCSET will
     47  * be the same as CCDIOCSET_60
     48  */
     49 static int
     50 compat_60_ccdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l,
     51     int (*f)(dev_t, u_long, void *, int, struct lwp *))
     52 {
     53 	switch (cmd) {
     54 #ifdef CCDIOCSET_60
     55 	case CCDIOCSET_60: {
     56 		if (data == NULL)
     57 			return 0;
     58 
     59 		struct ccd_ioctl ccio;
     60        		struct ccd_ioctl_60 *ccio60 = data;
     61 
     62 		ccio.ccio_disks = ccio60->ccio_disks;
     63 		ccio.ccio_ndisks = ccio60->ccio_ndisks;
     64 		ccio.ccio_ileave = ccio60->ccio_ileave;
     65 		ccio.ccio_flags = ccio60->ccio_flags;
     66 		ccio.ccio_unit = ccio60->ccio_unit;
     67 		int error = (*f)(dev, CCDIOCSET, &ccio, flag, l);
     68 		if (!error) {
     69 			/* Copy data back, adjust types if necessary */
     70 			ccio60->ccio_disks = ccio.ccio_disks;
     71 			ccio60->ccio_ndisks = ccio.ccio_ndisks;
     72 			ccio60->ccio_ileave = ccio.ccio_ileave;
     73 			ccio60->ccio_flags = ccio.ccio_flags;
     74 			ccio60->ccio_unit = ccio.ccio_unit;
     75 			ccio60->ccio_size = (size_t)ccio.ccio_size;
     76 		}
     77 		return error;
     78 	}
     79 
     80 	case CCDIOCCLR_60:
     81 		if (data == NULL)
     82 			return ENOSYS;
     83 		/*
     84 		 * ccio_size member not used, so existing struct OK
     85 		 * drop through to existing non-compat version
     86 		 */
     87 		return (*f)(dev, CCDIOCCLR, data, flag, l);
     88 #endif
     89 	default:
     90 		return ENOSYS;
     91 	}
     92 }
     93 
     94 void
     95 ccd_60_init(void)
     96 {
     97 
     98 	MODULE_HOOK_SET(ccd_ioctl_60_hook, compat_60_ccdioctl);
     99 }
    100 
    101 void
    102 ccd_60_fini(void)
    103 {
    104 
    105 	MODULE_HOOK_UNSET(ccd_ioctl_60_hook);
    106 }
    107