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kern_sysctl.c
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kern_sysctl.c
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/* $OpenBSD: kern_sysctl.c,v 1.408 2022/11/07 14:25:44 robert Exp $ */
/* $NetBSD: kern_sysctl.c,v 1.17 1996/05/20 17:49:05 mrg Exp $ */
/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Karels at Berkeley Software Design, Inc.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
*/
/*
* sysctl system call.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/vnode.h>
#include <sys/unistd.h>
#include <sys/buf.h>
#include <sys/clockintr.h>
#include <sys/tty.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/sysctl.h>
#include <sys/msgbuf.h>
#include <sys/vmmeter.h>
#include <sys/namei.h>
#include <sys/exec.h>
#include <sys/mbuf.h>
#include <sys/percpu.h>
#include <sys/sensors.h>
#include <sys/pipe.h>
#include <sys/eventvar.h>
#include <sys/socketvar.h>
#include <sys/socket.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/pledge.h>
#include <sys/timetc.h>
#include <sys/evcount.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <sys/sched.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/wait.h>
#include <sys/witness.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet6/ip6_var.h>
#ifdef DDB
#include <ddb/db_var.h>
#endif
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
#ifdef SYSVSEM
#include <sys/sem.h>
#endif
#ifdef SYSVSHM
#include <sys/shm.h>
#endif
#include "audio.h"
#include "dt.h"
#include "pf.h"
#include "video.h"
extern struct forkstat forkstat;
extern struct nchstats nchstats;
extern int fscale;
extern fixpt_t ccpu;
extern long numvnodes;
extern int allowdt;
extern int audio_record_enable;
extern int video_record_enable;
extern int autoconf_serial;
int allowkmem;
int sysctl_diskinit(int, struct proc *);
int sysctl_proc_args(int *, u_int, void *, size_t *, struct proc *);
int sysctl_proc_cwd(int *, u_int, void *, size_t *, struct proc *);
int sysctl_proc_nobroadcastkill(int *, u_int, void *, size_t, void *, size_t *,
struct proc *);
int sysctl_proc_vmmap(int *, u_int, void *, size_t *, struct proc *);
int sysctl_intrcnt(int *, u_int, void *, size_t *);
int sysctl_sensors(int *, u_int, void *, size_t *, void *, size_t);
int sysctl_cptime2(int *, u_int, void *, size_t *, void *, size_t);
int sysctl_audio(int *, u_int, void *, size_t *, void *, size_t);
int sysctl_video(int *, u_int, void *, size_t *, void *, size_t);
int sysctl_cpustats(int *, u_int, void *, size_t *, void *, size_t);
int sysctl_utc_offset(void *, size_t *, void *, size_t);
void fill_file(struct kinfo_file *, struct file *, struct filedesc *, int,
struct vnode *, struct process *, struct proc *, struct socket *, int);
void fill_kproc(struct process *, struct kinfo_proc *, struct proc *, int);
int (*cpu_cpuspeed)(int *);
/*
* Lock to avoid too many processes vslocking a large amount of memory
* at the same time.
*/
struct rwlock sysctl_lock = RWLOCK_INITIALIZER("sysctllk");
struct rwlock sysctl_disklock = RWLOCK_INITIALIZER("sysctldlk");
int
sys_sysctl(struct proc *p, void *v, register_t *retval)
{
struct sys_sysctl_args /* {
syscallarg(const int *) name;
syscallarg(u_int) namelen;
syscallarg(void *) old;
syscallarg(size_t *) oldlenp;
syscallarg(void *) new;
syscallarg(size_t) newlen;
} */ *uap = v;
int error, dolock = 1;
size_t savelen = 0, oldlen = 0;
sysctlfn *fn;
int name[CTL_MAXNAME];
if (SCARG(uap, new) != NULL &&
(error = suser(p)))
return (error);
/*
* all top-level sysctl names are non-terminal
*/
if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2)
return (EINVAL);
error = copyin(SCARG(uap, name), name,
SCARG(uap, namelen) * sizeof(int));
if (error)
return (error);
error = pledge_sysctl(p, SCARG(uap, namelen),
name, SCARG(uap, new));
if (error)
return (error);
switch (name[0]) {
case CTL_KERN:
fn = kern_sysctl;
break;
case CTL_HW:
fn = hw_sysctl;
break;
case CTL_VM:
fn = uvm_sysctl;
break;
case CTL_NET:
fn = net_sysctl;
break;
case CTL_FS:
fn = fs_sysctl;
break;
case CTL_VFS:
fn = vfs_sysctl;
break;
case CTL_MACHDEP:
fn = cpu_sysctl;
break;
#ifdef DEBUG_SYSCTL
case CTL_DEBUG:
fn = debug_sysctl;
break;
#endif
#ifdef DDB
case CTL_DDB:
fn = ddb_sysctl;
break;
#endif
default:
return (EOPNOTSUPP);
}
if (SCARG(uap, oldlenp) &&
(error = copyin(SCARG(uap, oldlenp), &oldlen, sizeof(oldlen))))
return (error);
if (SCARG(uap, old) != NULL) {
if ((error = rw_enter(&sysctl_lock, RW_WRITE|RW_INTR)) != 0)
return (error);
if (dolock) {
if (atop(oldlen) > uvmexp.wiredmax - uvmexp.wired) {
rw_exit_write(&sysctl_lock);
return (ENOMEM);
}
error = uvm_vslock(p, SCARG(uap, old), oldlen,
PROT_READ | PROT_WRITE);
if (error) {
rw_exit_write(&sysctl_lock);
return (error);
}
}
savelen = oldlen;
}
error = (*fn)(&name[1], SCARG(uap, namelen) - 1, SCARG(uap, old),
&oldlen, SCARG(uap, new), SCARG(uap, newlen), p);
if (SCARG(uap, old) != NULL) {
if (dolock)
uvm_vsunlock(p, SCARG(uap, old), savelen);
rw_exit_write(&sysctl_lock);
}
if (error)
return (error);
if (SCARG(uap, oldlenp))
error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen));
return (error);
}
/*
* Attributes stored in the kernel.
*/
char hostname[MAXHOSTNAMELEN];
int hostnamelen;
char domainname[MAXHOSTNAMELEN];
int domainnamelen;
long hostid;
char *disknames = NULL;
size_t disknameslen;
struct diskstats *diskstats = NULL;
size_t diskstatslen;
int securelevel;
/* morally const values reported by sysctl_bounded_arr */
static int arg_max = ARG_MAX;
static int openbsd = OpenBSD;
static int posix_version = _POSIX_VERSION;
static int ngroups_max = NGROUPS_MAX;
static int int_zero = 0;
static int int_one = 1;
static int maxpartitions = MAXPARTITIONS;
static int raw_part = RAW_PART;
extern int somaxconn, sominconn;
extern int nosuidcoredump;
extern int maxlocksperuid;
extern int uvm_wxabort;
extern int global_ptrace;
const struct sysctl_bounded_args kern_vars[] = {
{KERN_OSREV, &openbsd, SYSCTL_INT_READONLY},
{KERN_MAXVNODES, &maxvnodes, 0, INT_MAX},
{KERN_MAXPROC, &maxprocess, 0, INT_MAX},
{KERN_MAXFILES, &maxfiles, 0, INT_MAX},
{KERN_NFILES, &numfiles, SYSCTL_INT_READONLY},
{KERN_TTYCOUNT, &tty_count, SYSCTL_INT_READONLY},
{KERN_ARGMAX, &arg_max, SYSCTL_INT_READONLY},
{KERN_POSIX1, &posix_version, SYSCTL_INT_READONLY},
{KERN_NGROUPS, &ngroups_max, SYSCTL_INT_READONLY},
{KERN_JOB_CONTROL, &int_one, SYSCTL_INT_READONLY},
{KERN_SAVED_IDS, &int_one, SYSCTL_INT_READONLY},
{KERN_MAXPARTITIONS, &maxpartitions, SYSCTL_INT_READONLY},
{KERN_RAWPARTITION, &raw_part, SYSCTL_INT_READONLY},
{KERN_MAXTHREAD, &maxthread, 0, INT_MAX},
{KERN_NTHREADS, &nthreads, SYSCTL_INT_READONLY},
{KERN_SOMAXCONN, &somaxconn, 0, SHRT_MAX},
{KERN_SOMINCONN, &sominconn, 0, SHRT_MAX},
{KERN_NOSUIDCOREDUMP, &nosuidcoredump, 0, 3},
{KERN_FSYNC, &int_one, SYSCTL_INT_READONLY},
{KERN_SYSVMSG,
#ifdef SYSVMSG
&int_one,
#else
&int_zero,
#endif
SYSCTL_INT_READONLY},
{KERN_SYSVSEM,
#ifdef SYSVSEM
&int_one,
#else
&int_zero,
#endif
SYSCTL_INT_READONLY},
{KERN_SYSVSHM,
#ifdef SYSVSHM
&int_one,
#else
&int_zero,
#endif
SYSCTL_INT_READONLY},
{KERN_FSCALE, &fscale, SYSCTL_INT_READONLY},
{KERN_CCPU, &ccpu, SYSCTL_INT_READONLY},
{KERN_NPROCS, &nprocesses, SYSCTL_INT_READONLY},
{KERN_SPLASSERT, &splassert_ctl, 0, 3},
{KERN_MAXLOCKSPERUID, &maxlocksperuid, 0, INT_MAX},
{KERN_WXABORT, &uvm_wxabort, 0, 1},
{KERN_NETLIVELOCKS, &int_zero, SYSCTL_INT_READONLY},
#ifdef PTRACE
{KERN_GLOBAL_PTRACE, &global_ptrace, 0, 1},
#endif
{KERN_AUTOCONF_SERIAL, &autoconf_serial, SYSCTL_INT_READONLY},
};
int
kern_sysctl_dirs(int top_name, int *name, u_int namelen,
void *oldp, size_t *oldlenp, void *newp, size_t newlen, struct proc *p)
{
switch (top_name) {
#ifndef SMALL_KERNEL
case KERN_PROC:
return (sysctl_doproc(name, namelen, oldp, oldlenp));
case KERN_PROC_ARGS:
return (sysctl_proc_args(name, namelen, oldp, oldlenp, p));
case KERN_PROC_CWD:
return (sysctl_proc_cwd(name, namelen, oldp, oldlenp, p));
case KERN_PROC_NOBROADCASTKILL:
return (sysctl_proc_nobroadcastkill(name, namelen,
newp, newlen, oldp, oldlenp, p));
case KERN_PROC_VMMAP:
return (sysctl_proc_vmmap(name, namelen, oldp, oldlenp, p));
case KERN_FILE:
return (sysctl_file(name, namelen, oldp, oldlenp, p));
#endif
#if defined(GPROF) || defined(DDBPROF)
case KERN_PROF:
return (sysctl_doprof(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
case KERN_MALLOCSTATS:
return (sysctl_malloc(name, namelen, oldp, oldlenp,
newp, newlen, p));
case KERN_TTY:
return (sysctl_tty(name, namelen, oldp, oldlenp,
newp, newlen));
case KERN_POOL:
return (sysctl_dopool(name, namelen, oldp, oldlenp));
#if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM)
case KERN_SYSVIPC_INFO:
return (sysctl_sysvipc(name, namelen, oldp, oldlenp));
#endif
#ifdef SYSVSEM
case KERN_SEMINFO:
return (sysctl_sysvsem(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
#ifdef SYSVSHM
case KERN_SHMINFO:
return (sysctl_sysvshm(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
#ifndef SMALL_KERNEL
case KERN_INTRCNT:
return (sysctl_intrcnt(name, namelen, oldp, oldlenp));
case KERN_WATCHDOG:
return (sysctl_wdog(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
#ifndef SMALL_KERNEL
case KERN_EVCOUNT:
return (evcount_sysctl(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
case KERN_TIMECOUNTER:
return (sysctl_tc(name, namelen, oldp, oldlenp, newp, newlen));
case KERN_CPTIME2:
return (sysctl_cptime2(name, namelen, oldp, oldlenp,
newp, newlen));
#ifdef WITNESS
case KERN_WITNESSWATCH:
return witness_sysctl_watch(oldp, oldlenp, newp, newlen);
case KERN_WITNESS:
return witness_sysctl(name, namelen, oldp, oldlenp,
newp, newlen);
#endif
#if NAUDIO > 0
case KERN_AUDIO:
return (sysctl_audio(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
#if NVIDEO > 0
case KERN_VIDEO:
return (sysctl_video(name, namelen, oldp, oldlenp,
newp, newlen));
#endif
case KERN_CPUSTATS:
return (sysctl_cpustats(name, namelen, oldp, oldlenp,
newp, newlen));
#ifdef __HAVE_CLOCKINTR
case KERN_CLOCKINTR:
return sysctl_clockintr(name, namelen, oldp, oldlenp, newp,
newlen);
#endif
default:
return (ENOTDIR); /* overloaded */
}
}
/*
* kernel related system variables.
*/
int
kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen, struct proc *p)
{
int error, level, inthostid, stackgap;
dev_t dev;
extern int pool_debug;
/* dispatch the non-terminal nodes first */
if (namelen != 1) {
return kern_sysctl_dirs(name[0], name + 1, namelen - 1,
oldp, oldlenp, newp, newlen, p);
}
switch (name[0]) {
case KERN_OSTYPE:
return (sysctl_rdstring(oldp, oldlenp, newp, ostype));
case KERN_OSRELEASE:
return (sysctl_rdstring(oldp, oldlenp, newp, osrelease));
case KERN_OSVERSION:
return (sysctl_rdstring(oldp, oldlenp, newp, osversion));
case KERN_VERSION:
return (sysctl_rdstring(oldp, oldlenp, newp, version));
case KERN_NUMVNODES: /* XXX numvnodes is a long */
return (sysctl_rdint(oldp, oldlenp, newp, numvnodes));
case KERN_SECURELVL:
level = securelevel;
if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) ||
newp == NULL)
return (error);
if ((securelevel > 0 || level < -1) &&
level < securelevel && p->p_p->ps_pid != 1)
return (EPERM);
securelevel = level;
return (0);
#if NDT > 0
case KERN_ALLOWDT:
return (sysctl_securelevel_int(oldp, oldlenp, newp, newlen,
&allowdt));
#endif
case KERN_ALLOWKMEM:
return (sysctl_securelevel_int(oldp, oldlenp, newp, newlen,
&allowkmem));
case KERN_HOSTNAME:
error = sysctl_tstring(oldp, oldlenp, newp, newlen,
hostname, sizeof(hostname));
if (newp && !error)
hostnamelen = newlen;
return (error);
case KERN_DOMAINNAME:
if (securelevel >= 1 && domainnamelen && newp)
error = EPERM;
else
error = sysctl_tstring(oldp, oldlenp, newp, newlen,
domainname, sizeof(domainname));
if (newp && !error)
domainnamelen = newlen;
return (error);
case KERN_HOSTID:
inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */
error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid);
hostid = inthostid;
return (error);
case KERN_CLOCKRATE:
return (sysctl_clockrate(oldp, oldlenp, newp));
case KERN_BOOTTIME: {
struct timeval bt;
memset(&bt, 0, sizeof bt);
microboottime(&bt);
return (sysctl_rdstruct(oldp, oldlenp, newp, &bt, sizeof bt));
}
case KERN_MBSTAT: {
extern struct cpumem *mbstat;
uint64_t counters[MBSTAT_COUNT];
struct mbstat mbs;
unsigned int i;
memset(&mbs, 0, sizeof(mbs));
counters_read(mbstat, counters, MBSTAT_COUNT);
for (i = 0; i < MBSTAT_TYPES; i++)
mbs.m_mtypes[i] = counters[i];
mbs.m_drops = counters[MBSTAT_DROPS];
mbs.m_wait = counters[MBSTAT_WAIT];
mbs.m_drain = counters[MBSTAT_DRAIN];
return (sysctl_rdstruct(oldp, oldlenp, newp,
&mbs, sizeof(mbs)));
}
case KERN_MSGBUFSIZE:
case KERN_CONSBUFSIZE: {
struct msgbuf *mp;
mp = (name[0] == KERN_MSGBUFSIZE) ? msgbufp : consbufp;
/*
* deal with cases where the message buffer has
* become corrupted.
*/
if (!mp || mp->msg_magic != MSG_MAGIC)
return (ENXIO);
return (sysctl_rdint(oldp, oldlenp, newp, mp->msg_bufs));
}
case KERN_CONSBUF:
if ((error = suser(p)))
return (error);
/* FALLTHROUGH */
case KERN_MSGBUF: {
struct msgbuf *mp;
mp = (name[0] == KERN_MSGBUF) ? msgbufp : consbufp;
/* see note above */
if (!mp || mp->msg_magic != MSG_MAGIC)
return (ENXIO);
return (sysctl_rdstruct(oldp, oldlenp, newp, mp,
mp->msg_bufs + offsetof(struct msgbuf, msg_bufc)));
}
case KERN_CPTIME:
{
CPU_INFO_ITERATOR cii;
struct cpu_info *ci;
long cp_time[CPUSTATES];
int i, n = 0;
memset(cp_time, 0, sizeof(cp_time));
CPU_INFO_FOREACH(cii, ci) {
if (!cpu_is_online(ci))
continue;
n++;
for (i = 0; i < CPUSTATES; i++)
cp_time[i] += ci->ci_schedstate.spc_cp_time[i];
}
for (i = 0; i < CPUSTATES; i++)
cp_time[i] /= n;
return (sysctl_rdstruct(oldp, oldlenp, newp, &cp_time,
sizeof(cp_time)));
}
case KERN_NCHSTATS:
return (sysctl_rdstruct(oldp, oldlenp, newp, &nchstats,
sizeof(struct nchstats)));
case KERN_FORKSTAT:
return (sysctl_rdstruct(oldp, oldlenp, newp, &forkstat,
sizeof(struct forkstat)));
case KERN_STACKGAPRANDOM:
stackgap = stackgap_random;
error = sysctl_int(oldp, oldlenp, newp, newlen, &stackgap);
if (error)
return (error);
/*
* Safety harness.
*/
if ((stackgap < ALIGNBYTES && stackgap != 0) ||
!powerof2(stackgap) || stackgap >= MAXSSIZ)
return (EINVAL);
stackgap_random = stackgap;
return (0);
case KERN_MAXCLUSTERS: {
int val = nmbclust;
error = sysctl_int(oldp, oldlenp, newp, newlen, &val);
if (error == 0 && val != nmbclust)
error = nmbclust_update(val);
return (error);
}
case KERN_CACHEPCT: {
u_int64_t dmapages;
int opct, pgs;
opct = bufcachepercent;
error = sysctl_int(oldp, oldlenp, newp, newlen,
&bufcachepercent);
if (error)
return(error);
if (bufcachepercent > 90 || bufcachepercent < 5) {
bufcachepercent = opct;
return (EINVAL);
}
dmapages = uvm_pagecount(&dma_constraint);
if (bufcachepercent != opct) {
pgs = bufcachepercent * dmapages / 100;
bufadjust(pgs); /* adjust bufpages */
bufhighpages = bufpages; /* set high water mark */
}
return(0);
}
case KERN_CONSDEV:
if (cn_tab != NULL)
dev = cn_tab->cn_dev;
else
dev = NODEV;
return sysctl_rdstruct(oldp, oldlenp, newp, &dev, sizeof(dev));
case KERN_POOL_DEBUG: {
int old_pool_debug = pool_debug;
error = sysctl_int(oldp, oldlenp, newp, newlen,
&pool_debug);
if (error == 0 && pool_debug != old_pool_debug)
pool_reclaim_all();
return (error);
}
#if NPF > 0
case KERN_PFSTATUS:
return (pf_sysctl(oldp, oldlenp, newp, newlen));
#endif
case KERN_TIMEOUT_STATS:
return (timeout_sysctl(oldp, oldlenp, newp, newlen));
case KERN_UTC_OFFSET:
return (sysctl_utc_offset(oldp, oldlenp, newp, newlen));
default:
return (sysctl_bounded_arr(kern_vars, nitems(kern_vars), name,
namelen, oldp, oldlenp, newp, newlen));
}
/* NOTREACHED */
}
/*
* hardware related system variables.
*/
char *hw_vendor, *hw_prod, *hw_uuid, *hw_serial, *hw_ver;
int allowpowerdown = 1;
int hw_power = 1;
/* morally const values reported by sysctl_bounded_arr */
static int byte_order = BYTE_ORDER;
static int page_size = PAGE_SIZE;
const struct sysctl_bounded_args hw_vars[] = {
{HW_NCPU, &ncpus, SYSCTL_INT_READONLY},
{HW_NCPUFOUND, &ncpusfound, SYSCTL_INT_READONLY},
{HW_BYTEORDER, &byte_order, SYSCTL_INT_READONLY},
{HW_PAGESIZE, &page_size, SYSCTL_INT_READONLY},
{HW_DISKCOUNT, &disk_count, SYSCTL_INT_READONLY},
{HW_POWER, &hw_power, SYSCTL_INT_READONLY},
};
int
hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen, struct proc *p)
{
extern char machine[], cpu_model[];
int err, cpuspeed;
/* all sysctl names at this level except sensors are terminal */
if (name[0] != HW_SENSORS && namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case HW_MACHINE:
return (sysctl_rdstring(oldp, oldlenp, newp, machine));
case HW_MODEL:
return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model));
case HW_NCPUONLINE:
return (sysctl_rdint(oldp, oldlenp, newp,
sysctl_hwncpuonline()));
case HW_PHYSMEM:
return (sysctl_rdint(oldp, oldlenp, newp, ptoa(physmem)));
case HW_USERMEM:
return (sysctl_rdint(oldp, oldlenp, newp,
ptoa(physmem - uvmexp.wired)));
case HW_DISKNAMES:
err = sysctl_diskinit(0, p);
if (err)
return err;
if (disknames)
return (sysctl_rdstring(oldp, oldlenp, newp,
disknames));
else
return (sysctl_rdstring(oldp, oldlenp, newp, ""));
case HW_DISKSTATS:
err = sysctl_diskinit(1, p);
if (err)
return err;
return (sysctl_rdstruct(oldp, oldlenp, newp, diskstats,
disk_count * sizeof(struct diskstats)));
case HW_CPUSPEED:
if (!cpu_cpuspeed)
return (EOPNOTSUPP);
err = cpu_cpuspeed(&cpuspeed);
if (err)
return err;
return (sysctl_rdint(oldp, oldlenp, newp, cpuspeed));
#ifndef SMALL_KERNEL
case HW_SENSORS:
return (sysctl_sensors(name + 1, namelen - 1, oldp, oldlenp,
newp, newlen));
case HW_SETPERF:
return (sysctl_hwsetperf(oldp, oldlenp, newp, newlen));
case HW_PERFPOLICY:
return (sysctl_hwperfpolicy(oldp, oldlenp, newp, newlen));
#endif /* !SMALL_KERNEL */
case HW_VENDOR:
if (hw_vendor)
return (sysctl_rdstring(oldp, oldlenp, newp,
hw_vendor));
else
return (EOPNOTSUPP);
case HW_PRODUCT:
if (hw_prod)
return (sysctl_rdstring(oldp, oldlenp, newp, hw_prod));
else
return (EOPNOTSUPP);
case HW_VERSION:
if (hw_ver)
return (sysctl_rdstring(oldp, oldlenp, newp, hw_ver));
else
return (EOPNOTSUPP);
case HW_SERIALNO:
if (hw_serial)
return (sysctl_rdstring(oldp, oldlenp, newp,
hw_serial));
else
return (EOPNOTSUPP);
case HW_UUID:
if (hw_uuid)
return (sysctl_rdstring(oldp, oldlenp, newp, hw_uuid));
else
return (EOPNOTSUPP);
case HW_PHYSMEM64:
return (sysctl_rdquad(oldp, oldlenp, newp,
ptoa((psize_t)physmem)));
case HW_USERMEM64:
return (sysctl_rdquad(oldp, oldlenp, newp,
ptoa((psize_t)physmem - uvmexp.wired)));
case HW_ALLOWPOWERDOWN:
return (sysctl_securelevel_int(oldp, oldlenp, newp, newlen,
&allowpowerdown));
#ifdef __HAVE_CPU_TOPOLOGY
case HW_SMT:
return (sysctl_hwsmt(oldp, oldlenp, newp, newlen));
#endif
default:
return sysctl_bounded_arr(hw_vars, nitems(hw_vars), name,
namelen, oldp, oldlenp, newp, newlen);
}
/* NOTREACHED */
}
#ifdef DEBUG_SYSCTL
/*
* Debugging related system variables.
*/
extern struct ctldebug debug_vfs_busyprt;
struct ctldebug debug1, debug2, debug3, debug4;
struct ctldebug debug5, debug6, debug7, debug8, debug9;
struct ctldebug debug10, debug11, debug12, debug13, debug14;
struct ctldebug debug15, debug16, debug17, debug18, debug19;
static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = {
&debug_vfs_busyprt,
&debug1, &debug2, &debug3, &debug4,
&debug5, &debug6, &debug7, &debug8, &debug9,
&debug10, &debug11, &debug12, &debug13, &debug14,
&debug15, &debug16, &debug17, &debug18, &debug19,
};
int
debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen, struct proc *p)
{
struct ctldebug *cdp;
/* all sysctl names at this level are name and field */
if (namelen != 2)
return (ENOTDIR); /* overloaded */
if (name[0] < 0 || name[0] >= nitems(debugvars))
return (EOPNOTSUPP);
cdp = debugvars[name[0]];
if (cdp->debugname == 0)
return (EOPNOTSUPP);
switch (name[1]) {
case CTL_DEBUG_NAME:
return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname));
case CTL_DEBUG_VALUE:
return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
#endif /* DEBUG_SYSCTL */
/*
* Reads, or writes that lower the value
*/
int
sysctl_int_lower(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
int *valp)
{
unsigned int oval = *valp, val = *valp;
int error;
if (newp == NULL)
return (sysctl_rdint(oldp, oldlenp, newp, val));
if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &val)))
return (error);
if (val > oval)
return (EPERM); /* do not allow raising */
*(unsigned int *)valp = val;
return (0);
}
/*
* Validate parameters and get old / set new parameters
* for an integer-valued sysctl function.
*/
int
sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp)
{
int error = 0;
if (oldp && *oldlenp < sizeof(int))
return (ENOMEM);
if (newp && newlen != sizeof(int))
return (EINVAL);
*oldlenp = sizeof(int);
if (oldp)
error = copyout(valp, oldp, sizeof(int));
if (error == 0 && newp)
error = copyin(newp, valp, sizeof(int));
return (error);
}
/*
* As above, but read-only.
*/
int
sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val)
{
int error = 0;
if (oldp && *oldlenp < sizeof(int))
return (ENOMEM);
if (newp)
return (EPERM);
*oldlenp = sizeof(int);
if (oldp)
error = copyout((caddr_t)&val, oldp, sizeof(int));
return (error);
}
/*
* Selects between sysctl_rdint and sysctl_int according to securelevel.
*/
int
sysctl_securelevel_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
int *valp)
{
if (securelevel > 0)
return (sysctl_rdint(oldp, oldlenp, newp, *valp));
return (sysctl_int(oldp, oldlenp, newp, newlen, valp));
}
/*
* Read-only or bounded integer values.
*/
int
sysctl_int_bounded(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
int *valp, int minimum, int maximum)
{
int val = *valp;
int error;
/* read only */
if (newp == NULL || minimum > maximum)
return (sysctl_rdint(oldp, oldlenp, newp, val));
if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &val)))
return (error);
/* outside limits */
if (val < minimum || maximum < val)
return (EINVAL);
*valp = val;
return (0);
}
/*
* Array of read-only or bounded integer values.
*/
int
sysctl_bounded_arr(const struct sysctl_bounded_args *valpp, u_int valplen,
int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen)
{
u_int i;
if (namelen != 1)
return (ENOTDIR);
for (i = 0; i < valplen; ++i) {
if (valpp[i].mib == name[0]) {
return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
valpp[i].var, valpp[i].minimum, valpp[i].maximum));
}
}
return (EOPNOTSUPP);
}
/*
* Validate parameters and get old / set new parameters
* for an integer-valued sysctl function.
*/
int
sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
int64_t *valp)
{
int error = 0;
if (oldp && *oldlenp < sizeof(int64_t))
return (ENOMEM);
if (newp && newlen != sizeof(int64_t))
return (EINVAL);
*oldlenp = sizeof(int64_t);
if (oldp)
error = copyout(valp, oldp, sizeof(int64_t));
if (error == 0 && newp)
error = copyin(newp, valp, sizeof(int64_t));
return (error);
}
/*
* As above, but read-only.
*/
int
sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, int64_t val)
{
int error = 0;
if (oldp && *oldlenp < sizeof(int64_t))
return (ENOMEM);
if (newp)
return (EPERM);
*oldlenp = sizeof(int64_t);
if (oldp)
error = copyout((caddr_t)&val, oldp, sizeof(int64_t));
return (error);
}
/*
* Validate parameters and get old / set new parameters
* for a string-valued sysctl function.
*/
int
sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str,
size_t maxlen)
{
return sysctl__string(oldp, oldlenp, newp, newlen, str, maxlen, 0);
}
int
sysctl_tstring(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
char *str, size_t maxlen)
{
return sysctl__string(oldp, oldlenp, newp, newlen, str, maxlen, 1);
}
int
sysctl__string(void *oldp, size_t *oldlenp, void *newp, size_t newlen,
char *str, size_t maxlen, int trunc)
{
size_t len;
int error = 0;