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bio_30.c revision 1.2 
      1 /*	$NetBSD: bio_30.c,v 1.2 2019/01/27 02:08:39 pgoyette 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 1.2 2019/01/27 02:08:39 pgoyette 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/malloc.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 =
     62 		    malloc(sizeof(*bd), M_DEVBUF, M_WAITOK|M_ZERO);
     63 
     64 		(void)memcpy(bd, addr, sizeof(struct obioc_disk));
     65 		error = (*delegate)(cookie, BIOCDISK, bd);
     66 		if (error) {
     67 			free(bd, M_DEVBUF);
     68 			return error;
     69 		}
     70 
     71 		(void)memcpy(addr, bd, sizeof(struct obioc_disk));
     72 		free(bd, M_DEVBUF);
     73 		return 0;
     74 	}
     75 	case OBIOCVOL: {
     76 		struct bioc_vol *bv =
     77 		    malloc(sizeof(*bv), M_DEVBUF, M_WAITOK|M_ZERO);
     78 
     79 		(void)memcpy(bv, addr, sizeof(struct obioc_vol));
     80 		error = (*delegate)(cookie, BIOCVOL, bv);
     81 		if (error) {
     82 			free(bv, M_DEVBUF);
     83 			return error;
     84 		}
     85 
     86 		(void)memcpy(addr, bv, sizeof(struct obioc_vol));
     87 		free(bv, M_DEVBUF);
     88 		return 0;
     89 	}
     90 	default:
     91 		return ENOSYS;
     92 	}
     93 }
     94 
     95 void
     96 bio_30_init(void)
     97 {
     98 
     99 	MODULE_SET_HOOK(compat_bio_30_hook, "bio_30", compat_30_bio);
    100 }
    101 
    102 void
    103 bio_30_fini(void)
    104 {
    105 
    106 	MODULE_UNSET_HOOK(compat_bio_30_hook);
    107 }
    108