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      1 /*	$NetBSD: bio_30.c,v 1.5 2020/12/19 22:10:56 thorpej Exp $ */
      2 /*	$OpenBSD: bio.c,v 1.9 2007/03/20 02:35:55 marco Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2002 Niklas Hallqvist.  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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: bio_30.c,v 1.5 2020/12/19 22:10:56 thorpej Exp $");
     30 
     31 #if defined(_KERNEL_OPT)
     32 #include "opt_compat_netbsd.h"
     33 #endif
     34 
     35 #include <sys/param.h>
     36 #include <sys/conf.h>
     37 #include <sys/device.h>
     38 #include <sys/event.h>
     39 #include <sys/ioctl.h>
     40 #include <sys/kmem.h>
     41 #include <sys/queue.h>
     42 #include <sys/systm.h>
     43 #include <sys/mutex.h>
     44 #include <sys/proc.h>
     45 #include <sys/kauth.h>
     46 #include <sys/compat_stub.h>
     47 
     48 #include <dev/biovar.h>
     49 #include <dev/sysmon/sysmonvar.h>
     50 
     51 #include <compat/common/compat_mod.h>
     52 
     53 static int
     54 compat_30_bio(void *cookie, u_long cmd, void *addr,
     55     int (*delegate)(void *, u_long, void *))
     56 {
     57 	int error;
     58 
     59 	switch (cmd) {
     60 	case OBIOCDISK: {
     61 		struct bioc_disk *bd = kmem_zalloc(sizeof(*bd), KM_SLEEP);
     62 
     63 		(void)memcpy(bd, addr, sizeof(struct obioc_disk));
     64 		error = (*delegate)(cookie, BIOCDISK, bd);
     65 		if (error) {
     66 			kmem_free(bd, sizeof(*bd));
     67 			return error;
     68 		}
     69 
     70 		(void)memcpy(addr, bd, sizeof(struct obioc_disk));
     71 		kmem_free(bd, sizeof(*bd));
     72 		return 0;
     73 	}
     74 	case OBIOCVOL: {
     75 		struct bioc_vol *bv = kmem_zalloc(sizeof(*bv), KM_SLEEP);
     76 
     77 		(void)memcpy(bv, addr, sizeof(struct obioc_vol));
     78 		error = (*delegate)(cookie, BIOCVOL, bv);
     79 		if (error) {
     80 			kmem_free(bv, sizeof(*bv));
     81 			return error;
     82 		}
     83 
     84 		(void)memcpy(addr, bv, sizeof(struct obioc_vol));
     85 		kmem_free(bv, sizeof(*bv));
     86 		return 0;
     87 	}
     88 	default:
     89 		return ENOSYS;
     90 	}
     91 }
     92 
     93 void
     94 bio_30_init(void)
     95 {
     96 
     97 	MODULE_HOOK_SET(compat_bio_30_hook, compat_30_bio);
     98 }
     99 
    100 void
    101 bio_30_fini(void)
    102 {
    103 
    104 	MODULE_HOOK_UNSET(compat_bio_30_hook);
    105 }
    106