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uvm_50.c revision 1.1.2.2 
      1 /*	$NetBSD: uvm_50.c,v 1.1.2.2 2018/03/15 09:12:05 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 1.1.2.2 2018/03/15 09:12:05 pgoyette Exp $");
     34 
     35 #if defined(_KERNEL) || defined(_MODULE)
     36 #if defined(_KERNEL_OPT)
     37 #include "opt_vmswap.h"
     38 #else
     39 #define VMSWAP	/* XXX */
     40 #endif
     41 #endif
     42 
     43 #include <sys/param.h>
     44 #include <sys/types.h>
     45 #include <sys/systm.h>
     46 #include <sys/syscallargs.h>
     47 #include <sys/swap.h>
     48 #include <uvm/uvm.h>
     49 
     50 #include <compat/sys/uvm.h>
     51 
     52 static void
     53 swapent50_cvt(void *p, const struct swapent *se)
     54 {
     55 	struct swapent50 *sep50 = p;
     56 
     57 	sep50->se50_dev = se->se_dev;
     58 	sep50->se50_flags = se->se_flags;
     59 	sep50->se50_nblks = se->se_nblks;
     60 	sep50->se50_inuse = se->se_inuse;
     61 	sep50->se50_priority = se->se_priority;
     62 	KASSERT(sizeof(se->se_path) <= sizeof(sep50->se50_path));
     63 	strcpy(sep50->se50_path, se->se_path);
     64 }
     65 
     66 
     67 static int
     68 compat_uvm_swap_stats50(const struct sys_swapctl_args *uap, register_t *retval)
     69 {
     70      return uvm_swap_stats(SCARG(uap, arg), SCARG(uap, misc),
     71 	 swapent50_cvt, sizeof(struct swapent50), retval);
     72 
     73 }
     74 
     75 void
     76 uvm_50_init(void)
     77 {
     78 	uvm_swap_stats50 = compat_uvm_swap_stats50;
     79 }
     80 
     81 void
     82 uvm_50_fini(void)
     83 {
     84 	uvm_swap_stats50 = (void *)enosys;
     85 }
     86