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uvm_50.c revision 1.2 
      1 /*	$NetBSD: uvm_50.c,v 1.2 2019/01/27 02:08:39 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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: uvm_50.c,v 1.2 2019/01/27 02:08:39 pgoyette Exp $");
     34 
     35 #if defined(_KERNEL_OPT)
     36 #include "opt_compat_netbsd.h"
     37 #endif
     38 
     39 #if defined(_KERNEL) || defined(_MODULE)
     40 #if defined(_KERNEL_OPT)
     41 #include "opt_vmswap.h"
     42 #else
     43 #define VMSWAP	/* XXX */
     44 #endif
     45 #endif
     46 
     47 #include <sys/param.h>
     48 #include <sys/types.h>
     49 #include <sys/systm.h>
     50 #include <sys/syscallargs.h>
     51 #include <sys/swap.h>
     52 #include <uvm/uvm.h>
     53 
     54 #include <compat/sys/uvm.h>
     55 
     56 static void
     57 swapent50_cvt(void *p, const struct swapent *se)
     58 {
     59 	struct swapent50 *sep50 = p;
     60 
     61 	sep50->se50_dev = se->se_dev;
     62 	sep50->se50_flags = se->se_flags;
     63 	sep50->se50_nblks = se->se_nblks;
     64 	sep50->se50_inuse = se->se_inuse;
     65 	sep50->se50_priority = se->se_priority;
     66 	KASSERT(sizeof(se->se_path) <= sizeof(sep50->se50_path));
     67 	strcpy(sep50->se50_path, se->se_path);
     68 }
     69 
     70 
     71 static int
     72 compat_uvm_swap_stats50(const struct sys_swapctl_args *uap, register_t *retval)
     73 {
     74      return uvm_swap_stats(SCARG(uap, arg), SCARG(uap, misc),
     75 	 swapent50_cvt, sizeof(struct swapent50), retval);
     76 
     77 }
     78 
     79 void
     80 uvm_50_init(void)
     81 {
     82 	uvm_swap_stats50 = compat_uvm_swap_stats50;
     83 }
     84 
     85 void
     86 uvm_50_fini(void)
     87 {
     88 	uvm_swap_stats50 = (void *)enosys;
     89 }
     90