NetBSD-5.0.2/sys/compat/linux/common/linux_sysctl.c
/* $NetBSD: linux_sysctl.c,v 1.36 2008/06/18 12:24:18 tsutsui 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* sysctl system call.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.36 2008/06/18 12:24:18 tsutsui Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <sys/sched.h>
#include <sys/syscallargs.h>
#include <sys/ktrace.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux/common/linux_sysctl.h>
#include <compat/linux/common/linux_exec.h>
#include <compat/linux/common/linux_machdep.h>
char linux_sysname[128] = "Linux";
#if defined(__amd64__) || defined(__i386__) || defined(__powerpc__)
char linux_release[128] = "2.4.18";
char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
#else
char linux_release[128] = "2.0.38";
char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000";
#endif
#ifndef _LKM
static
#endif
struct sysctlnode linux_sysctl_root = {
.sysctl_flags = SYSCTL_VERSION|
CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE,
.sysctl_num = 0,
.sysctl_name = "(linux_root)",
sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)),
};
/*
* setup for small sysctl tree used by emulation
*/
SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup")
{
const struct sysctlnode *node = &linux_sysctl_root;
sysctl_createv(clog, 0, &node, &node,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "kern", NULL,
NULL, 0, NULL, 0,
LINUX_CTL_KERN, CTL_EOL);
sysctl_createv(clog, 0, &node, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "ostype", NULL,
NULL, 0, linux_sysname, sizeof(linux_sysname),
LINUX_KERN_OSTYPE, CTL_EOL);
sysctl_createv(clog, 0, &node, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "osrelease", NULL,
NULL, 0, linux_release, sizeof(linux_release),
LINUX_KERN_OSRELEASE, CTL_EOL);
sysctl_createv(clog, 0, &node, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "version", NULL,
NULL, 0, linux_version, sizeof(linux_version),
LINUX_KERN_VERSION, CTL_EOL);
linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE;
}
/*
* linux sysctl system call
*/
int
linux_sys___sysctl(struct lwp *l, const struct linux_sys___sysctl_args *uap, register_t *retval)
{
struct linux___sysctl ls;
int error, nerror, name[CTL_MAXNAME];
size_t savelen = 0, oldlen = 0;
/*
* get linux args structure
*/
if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls))))
return error;
/*
* get oldlen
*/
oldlen = 0;
if (ls.oldlenp != NULL) {
error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen));
if (error)
return (error);
}
savelen = oldlen;
/*
* top-level sysctl names may or may not be non-terminal, but
* we don't care
*/
if (ls.nlen > CTL_MAXNAME || ls.nlen < 1)
return (EINVAL);
error = copyin(ls.name, &name, ls.nlen * sizeof(int));
if (error)
return (error);
ktrmib(name, ls.nlen);
/*
* dispatch request into linux sysctl tree
*/
sysctl_lock(ls.newval != NULL);
error = sysctl_dispatch(&name[0], ls.nlen,
ls.oldval, &oldlen,
ls.newval, ls.newlen,
&name[0], l, &linux_sysctl_root);
sysctl_unlock();
/*
* reset caller's oldlen, even if we got an error
*/
if (ls.oldlenp) {
nerror = copyout(&oldlen, ls.oldlenp, sizeof(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 && ls.oldval != NULL && savelen < oldlen)
error = ENOMEM;
return (error);
}
/*
* kernel related system variables under emul.linux in the main sysctl
* tree
*/
SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "emul", NULL,
NULL, 0, NULL, 0,
CTL_EMUL, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "linux",
SYSCTL_DESCR("Linux emulation settings"),
NULL, 0, NULL, 0,
CTL_EMUL, EMUL_LINUX, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "kern",
SYSCTL_DESCR("Linux kernel emulation settings"),
NULL, 0, NULL, 0,
CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "ostype",
SYSCTL_DESCR("Linux operating system type"),
NULL, 0, linux_sysname, sizeof(linux_sysname),
CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
EMUL_LINUX_KERN_OSTYPE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "osrelease",
SYSCTL_DESCR("Linux operating system release"),
NULL, 0, linux_release, sizeof(linux_release),
CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
EMUL_LINUX_KERN_OSRELEASE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "osversion",
SYSCTL_DESCR("Linux operating system revision"),
NULL, 0, linux_version, sizeof(linux_version),
CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
EMUL_LINUX_KERN_VERSION, CTL_EOL);
}