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
linux32_sys_sysinfo(struct lwp * l,const struct linux32_sys_sysinfo_args * uap,register_t * retval)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