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      1 /*	$NetBSD: linux32_sysinfo.c,v 1.14 2021/11/25 03:08:04 ryo Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Emmanuel Dreyfus
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
     22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 __KERNEL_RCSID(0, "$NetBSD: linux32_sysinfo.c,v 1.14 2021/11/25 03:08:04 ryo Exp $");
     37 
     38 #include <sys/types.h>
     39 #include <sys/param.h>
     40 #include <sys/atomic.h>
     41 #include <sys/kernel.h>
     42 #include <sys/dirent.h>
     43 #include <sys/proc.h>
     44 
     45 #include <sys/syscallargs.h>
     46 
     47 #include <uvm/uvm_extern.h>
     48 
     49 #include <compat/netbsd32/netbsd32.h>
     50 #include <compat/netbsd32/netbsd32_conv.h>
     51 #include <compat/netbsd32/netbsd32_syscallargs.h>
     52 
     53 #include <compat/linux/common/linux_types.h>
     54 #include <compat/linux/common/linux_signal.h>
     55 #include <compat/linux/common/linux_misc.h>
     56 #include <compat/linux/common/linux_ipc.h>
     57 #include <compat/linux/common/linux_sem.h>
     58 #include <compat/linux/linux_syscallargs.h>
     59 
     60 #include <compat/linux32/common/linux32_types.h>
     61 #include <compat/linux32/common/linux32_signal.h>
     62 #include <compat/linux32/linux32_syscallargs.h>
     63 
     64 /* ARGSUSED */
     65 int
     66 linux32_sys_sysinfo(struct lwp *l, const struct linux32_sys_sysinfo_args *uap, register_t *retval)
     67 {
     68 	/* {
     69 		syscallarg(struct linux32_sysinfo *) arg;
     70 	} */
     71 	struct linux32_sysinfo si;
     72 	struct loadavg *la;
     73 	int64_t filepg;
     74 
     75 	memset(&si, 0, sizeof(si));
     76 	si.uptime = time_uptime;
     77 	la = &averunnable;
     78 	si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
     79 	si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
     80 	si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
     81 	si.totalram = ctob((u_long)physmem);
     82 	/* uvm_availmem() may sync the counters. */
     83 	si.freeram = (u_long)uvm_availmem(true) * uvmexp.pagesize;
     84 	filepg = cpu_count_get(CPU_COUNT_FILECLEAN) +
     85 	    cpu_count_get(CPU_COUNT_FILEDIRTY) +
     86 	    cpu_count_get(CPU_COUNT_FILEUNKNOWN) -
     87 	    cpu_count_get(CPU_COUNT_EXECPAGES);
     88 	si.sharedram = 0;	/* XXX */
     89 	si.bufferram = (u_long)(filepg * uvmexp.pagesize);
     90 	si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize;
     91 	si.freeswap =
     92 	    (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize;
     93 	si.procs = atomic_load_relaxed(&nprocs);
     94 
     95 	/* The following are only present in newer Linux kernels. */
     96 	si.totalbig = 0;
     97 	si.freebig = 0;
     98 	si.mem_unit = 1;
     99 
    100 	return (copyout(&si, SCARG_P32(uap, arg), sizeof si));
    101 }
    102 
    103