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rndpseudo_50.c revision 1.2.38.1 
      1 /*	$NetBSD: rndpseudo_50.c,v 1.2.38.1 2018/03/21 02:01:34 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Michael Graff <explorer (at) flame.org> and Thor Lancelot Simon.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: rndpseudo_50.c,v 1.2.38.1 2018/03/21 02:01:34 pgoyette Exp $");
     34 
     35 #if defined(_KERNEL_OPT)
     36 #include "opt_compat_netbsd.h"
     37 #endif
     38 
     39 #include <sys/param.h>
     40 #include <sys/file.h>
     41 
     42 #include <sys/rnd.h>
     43 #include <compat/sys/rnd.h>
     44 
     45 /*
     46  * Convert from rndsource_t to rndsource50_t, for the results from
     47  * RNDGETNUM50 and RNDGETNAME50.
     48  */
     49 static void
     50 rndsource_to_rndsource50(rndsource_t *r, rndsource50_t *r50)
     51 {
     52 	memset(r50, 0, sizeof(*r50));
     53 	strlcpy(r50->name, r->name, sizeof(r50->name));
     54 	r50->total = r->total;
     55 	r50->type = r->type;
     56 	r50->flags = r->flags;
     57 }
     58 
     59 /*
     60  * COMPAT_50 handling for rnd_ioctl.  This is called from rnd_ioctl.
     61  *
     62  * It also handles the case of (COMPAT_50 && COMPAT_NETBSD32).
     63  */
     64 int
     65 compat_50_rnd_ioctl(struct file *fp, u_long cmd, void *addr)
     66 {
     67 	int ret = 0;
     68 
     69 	switch (cmd) {
     70 
     71 	case RNDGETSRCNUM50:
     72 	{
     73 		rndstat_t rstbuf = {.start = 0};
     74 		rndstat50_t *rst50 = (rndstat50_t *)addr;
     75 		int count;
     76 
     77 		if (rst50->count > RND_MAXSTATCOUNT50)
     78 			return EINVAL;
     79 
     80 		rstbuf.start = rst50->start;
     81 		rstbuf.count = rst50->count;
     82 
     83 		ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNUM, &rstbuf);
     84 		if (ret != 0)
     85 			return ret;
     86 
     87 		for (count = 0; count < rst50->count; count++) {
     88 			rndsource_to_rndsource50(&rstbuf.source[count],
     89 			    &rst50->source[count]);
     90 		}
     91 		rst50->count = rstbuf.count;
     92 
     93 		break;
     94 	}
     95 
     96 	case RNDGETSRCNAME50:
     97 	{
     98 		rndstat_name_t rstnmbuf = {.name[0] = 0};
     99 		rndstat_name50_t *rstnm50;
    100 		rstnm50 = (rndstat_name50_t *)addr;
    101 
    102 		strlcpy(rstnmbuf.name, rstnm50->name, sizeof(rstnmbuf.name));
    103 
    104 		ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNAME, &rstnmbuf);
    105 		if (ret != 0)
    106 			return ret;
    107 
    108 		rndsource_to_rndsource50(&rstnmbuf.source, &rstnm50->source);
    109 
    110 		break;
    111 	}
    112 
    113 	default:
    114 		return ENOTTY;
    115 	}
    116 
    117 	return ret;
    118 }
    119