/*	$NetBSD: linux32_sysinfo.c,v 1.14 2021/11/25 03:08:04 ryo Exp $ */

/*-
 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Emmanuel Dreyfus
 * 4. The name of the author may not be used to endorse or promote 
 *    products derived from this software without specific prior written 
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD: linux32_sysinfo.c,v 1.14 2021/11/25 03:08:04 ryo Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/atomic.h>
#include <sys/kernel.h>
#include <sys/dirent.h>
#include <sys/proc.h>

#include <sys/syscallargs.h>

#include <uvm/uvm_extern.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_conv.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>

#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_misc.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>

#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/linux32_syscallargs.h>

/* ARGSUSED */
int
linux32_sys_sysinfo(struct lwp *l, const struct linux32_sys_sysinfo_args *uap, register_t *retval)
{
	/* {
		syscallarg(struct linux32_sysinfo *) arg;
	} */
	struct linux32_sysinfo si;
	struct loadavg *la;
	int64_t filepg;

	memset(&si, 0, sizeof(si));
	si.uptime = time_uptime;
	la = &averunnable;
	si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
	si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
	si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
	si.totalram = ctob((u_long)physmem);
	/* uvm_availmem() may sync the counters. */
	si.freeram = (u_long)uvm_availmem(true) * uvmexp.pagesize;
	filepg = cpu_count_get(CPU_COUNT_FILECLEAN) +
	    cpu_count_get(CPU_COUNT_FILEDIRTY) +
	    cpu_count_get(CPU_COUNT_FILEUNKNOWN) -
	    cpu_count_get(CPU_COUNT_EXECPAGES);
	si.sharedram = 0;	/* XXX */
	si.bufferram = (u_long)(filepg * uvmexp.pagesize);
	si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize;
	si.freeswap = 
	    (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize;
	si.procs = atomic_load_relaxed(&nprocs);

	/* The following are only present in newer Linux kernels. */
	si.totalbig = 0;
	si.freebig = 0;
	si.mem_unit = 1;

	return (copyout(&si, SCARG_P32(uap, arg), sizeof si));
}