/*      $NetBSD: netbsd32_sysctl.c,v 1.45 2021/01/19 03:20:13 simonb Exp $      */

/*
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* 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. 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 AUTHOR ``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 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: netbsd32_sysctl.c,v 1.45 2021/01/19 03:20:13 simonb Exp $");

#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <sys/syscallargs.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/dirent.h>
#include <sys/ktrace.h>

#include <uvm/uvm_extern.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>
#include <compat/netbsd32/netbsd32_sysctl.h>

#if defined(DDB)
#include <ddb/ddbvar.h>
#endif

struct sysctlnode netbsd32_sysctl_root = {
       .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
       .sysctl_num = 0,
       .sysctl_name = "(netbsd32_root)",
       .sysctl_size = sizeof(struct sysctlnode),
};

/*
* sysctl helper routine for netbsd32's kern.boottime node
*/
static int
netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS)
{
       struct sysctlnode node;
       struct netbsd32_timespec bt32;
       struct timespec ts;

       getnanoboottime(&ts);
       netbsd32_from_timespec(&ts, &bt32);

       node = *rnode;
       node.sysctl_data = &bt32;
       return sysctl_lookup(SYSCTLFN_CALL(&node));
}

/*
* sysctl helper routine for netbsd32's vm.loadavg node
*/
static int
netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS)
{
       struct sysctlnode node;
       struct netbsd32_loadavg av32;

       netbsd32_from_loadavg(&av32, &averunnable);

       node = *rnode;
       node.sysctl_data = &av32;
       return sysctl_lookup(SYSCTLFN_CALL(&node));
}

static int
sysctl_hw_machine_arch32(SYSCTLFN_ARGS)
{
       struct sysctlnode node = *rnode;
#ifndef PROC_MACHINE_ARCH32
       extern const char machine_arch32[];
#define PROC_MACHINE_ARCH32(P)  __UNCONST(machine_arch32)
#endif

       node.sysctl_data = PROC_MACHINE_ARCH32(l->l_proc);
       node.sysctl_size = strlen(node.sysctl_data) + 1;
       return sysctl_lookup(SYSCTLFN_CALL(&node));
}

SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "netbsd32 shadow tree")
{
       const struct sysctlnode *_root = &netbsd32_sysctl_root;
       extern const char machine32[];

       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_NODE, "kern", NULL,
                      NULL, 0, NULL, 0,
                      CTL_KERN, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_STRUCT, "boottime", NULL,
                      netbsd32_sysctl_kern_boottime, 0, NULL,
                      sizeof(struct netbsd32_timeval),
                      CTL_KERN, KERN_BOOTTIME, CTL_EOL);

       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_NODE, "vm", NULL,
                      NULL, 0, NULL, 0,
                      CTL_VM, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_STRUCT, "loadavg", NULL,
                      netbsd32_sysctl_vm_loadavg, 0, NULL,
                      sizeof(struct netbsd32_loadavg),
                      CTL_VM, VM_LOADAVG, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
                      CTLTYPE_INT, "maxaddress",
                      SYSCTL_DESCR("Maximum user address"),
                      NULL, VM_MAXUSER_ADDRESS32, NULL, 0,
                      CTL_VM, VM_MAXADDRESS, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
                      CTLTYPE_INT, "minaddress",
                      SYSCTL_DESCR("Minimum user address"),
                      NULL, VM_MIN_ADDRESS, NULL, 0,
                      CTL_VM, VM_MINADDRESS, CTL_EOL);

       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_NODE, "hw", NULL,
                      NULL, 0, NULL, 0,
                      CTL_HW, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
                      CTLTYPE_INT, "alignbytes", NULL,
                      NULL, ALIGNBYTES32, NULL, 0,
                      CTL_HW, HW_ALIGNBYTES, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT,
                      CTLTYPE_STRING, "machine", NULL,
                      NULL, 0, __UNCONST(&machine32), 0,
                      CTL_HW, HW_MACHINE, CTL_EOL);
       sysctl_createv(clog, 0, &_root, NULL,
                      CTLFLAG_PERMANENT|CTLFLAG_READONLY,
                      CTLTYPE_STRING, "machine_arch", NULL,
                      sysctl_hw_machine_arch32, 0, NULL, 0,
                      CTL_HW, HW_MACHINE_ARCH, CTL_EOL);
}

void
netbsd32_sysctl_fini(void)
{

       sysctl_free(&netbsd32_sysctl_root);
}

int
netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval)
{
       /* {
               syscallarg(netbsd32_intp) name;
               syscallarg(u_int) namelen;
               syscallarg(netbsd32_voidp) old;
               syscallarg(netbsd32_size_tp) oldlenp;
               syscallarg(netbsd32_voidp) new;
               syscallarg(netbsd32_size_t) newlen;
       } */
       const struct sysctlnode *pnode;
       netbsd32_size_t netbsd32_oldlen;
       size_t oldlen, *oldlenp, savelen;
       int name[CTL_MAXNAME], error, nerror, *namep;
       void *newp, *oldp;

       /*
        * get and convert 32 bit size_t to native size_t
        */
       namep = SCARG_P32(uap, name);
       oldp = SCARG_P32(uap, oldv);
       newp = SCARG_P32(uap, newv);
       oldlenp = SCARG_P32(uap, oldlenp);
       oldlen = 0;
       if (oldlenp != NULL) {
               error = copyin(oldlenp, &netbsd32_oldlen,
                              sizeof(netbsd32_oldlen));
               if (error)
                       return error;
               oldlen = netbsd32_oldlen;
       }
       savelen = oldlen;

       /*
        * retrieve name and see if we need to dispatch this query to
        * the shadow tree.  if we find it in the shadow tree,
        * dispatch to there, otherwise NULL means use the built-in
        * default main tree.
        */
       if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1)
               return EINVAL;
       error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int));
       if (error)
               return error;

       ktrmib(name, SCARG(uap, namelen));

       sysctl_lock(newp != NULL);
       pnode = &netbsd32_sysctl_root;
       error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL);
       pnode = (error == 0) ? &netbsd32_sysctl_root : NULL;
       error = sysctl_dispatch(&name[0], SCARG(uap, namelen),
                               oldp, &oldlen,
                               newp, SCARG(uap, newlen),
                               &name[0], l, pnode);
       sysctl_unlock();

       /*
        * reset caller's oldlen, even if we got an error
        */
       if (oldlenp) {
               netbsd32_oldlen = oldlen;
               nerror = copyout(&netbsd32_oldlen, oldlenp,
                                sizeof(netbsd32_oldlen));
               if (error == 0)
                       error = nerror;
       }

       /*
        * if the only problem is that we weren't given enough space,
        * that's an ENOMEM error
        */
       if (error == 0 && oldp != NULL && savelen < oldlen)
               error = ENOMEM;

       return error;
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.