NetBSD-5.0.2/sys/compat/linux32/common/linux32_sysctl.c
/* $NetBSD: linux32_sysctl.c,v 1.9 2008/01/07 16:12:53 ad Exp $ */
/*-
* Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Emmanuel Dreyfus
* 4. 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 THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux32_sysctl.c,v 1.9 2008/01/07 16:12:53 ad 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/syscallargs.h>
#include <sys/ktrace.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_sysctl.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/common/linux32_sysctl.h>
#include <compat/linux32/linux32_syscallargs.h>
char linux32_sysname[128] = "Linux";
char linux32_release[128] = "2.4.18";
char linux32_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
SYSCTL_SETUP(sysctl_emul_linux32_setup, "sysctl emul.linux32 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, "linux32",
SYSCTL_DESCR("Linux 32 bit emulation settings"),
NULL, 0, NULL, 0,
CTL_EMUL, EMUL_LINUX32, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "kern",
SYSCTL_DESCR("Linux 32 bit kernel emulation settings"),
NULL, 0, NULL, 0,
CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "ostype",
SYSCTL_DESCR("Linux 32 bit operating system type"),
NULL, 0, linux32_sysname, sizeof(linux32_sysname),
CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
EMUL_LINUX32_KERN_OSTYPE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "osrelease",
SYSCTL_DESCR("Linux 32 bit operating system release"),
NULL, 0, linux32_release, sizeof(linux32_release),
CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
EMUL_LINUX32_KERN_OSRELEASE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "osversion",
SYSCTL_DESCR("Linux 32 bit operating system revision"),
NULL, 0, linux32_version, sizeof(linux32_version),
CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
EMUL_LINUX32_KERN_VERSION, CTL_EOL);
}
#ifndef _LKM
static
#endif
struct sysctlnode linux32_sysctl_root = {
.sysctl_flags = SYSCTL_VERSION|
CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE,
.sysctl_num = 0,
.sysctl_name = "(linux32_root)",
sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)),
};
SYSCTL_SETUP(linux32_sysctl_setup, "linux32 emulated sysctl subtree setup")
{
const struct sysctlnode *node = &linux32_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, linux32_sysname, sizeof(linux32_sysname),
LINUX_KERN_OSTYPE, CTL_EOL);
sysctl_createv(clog, 0, &node, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "osrelease", NULL,
NULL, 0, linux32_release, sizeof(linux32_release),
LINUX_KERN_OSRELEASE, CTL_EOL);
sysctl_createv(clog, 0, &node, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "version", NULL,
NULL, 0, linux32_version, sizeof(linux32_version),
LINUX_KERN_VERSION, CTL_EOL);
linux32_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE;
}
int
linux32_sys___sysctl(struct lwp *l, const struct linux32_sys___sysctl_args *uap, register_t *retval)
{
/* {
syscallarg(linux32___sysctlp_t) lsp;
} */
struct linux32_sysctl ls32;
int name[CTL_MAXNAME];
size_t savelen;
netbsd32_size_t oldlen32;
size_t oldlen;
int error;
/*
* Read sysctl arguments
*/
if ((error = copyin(SCARG_P32(uap, lsp), &ls32, sizeof(ls32))) != 0)
return error;
/*
* Read oldlen
*/
if (NETBSD32PTR64(ls32.oldlenp) != NULL) {
if ((error = copyin(NETBSD32PTR64(ls32.oldlenp),
&oldlen32, sizeof(oldlen32))) != 0)
return error;
} else {
oldlen32 = 0;
}
savelen = (size_t)oldlen32;
/*
* Sanity check nlen
*/
if ((ls32.nlen > CTL_MAXNAME) || (ls32.nlen < 1))
return EINVAL;
/*
* Read the sysctl name
*/
if ((error = copyin(NETBSD32PTR64(ls32.name), &name,
ls32.nlen * sizeof(int))) != 0)
return error;
ktrmib(name, ls32.nlen);
/*
* First try linux32 tree, then linux tree
*/
oldlen = (size_t)oldlen32;
sysctl_lock(NETBSD32PTR64(ls32.newval) != NULL);
error = sysctl_dispatch(name, ls32.nlen,
NETBSD32PTR64(ls32.oldval), &oldlen,
NETBSD32PTR64(ls32.newval), ls32.newlen,
name, l, &linux32_sysctl_root);
oldlen32 = (netbsd32_size_t)oldlen;
sysctl_unlock();
/*
* Check for oldlen overflow (not likely, but who knows...)
*/
if (oldlen != oldlen32) {
#ifdef DEBUG_LINUX
printf("%s: oldlen32 = %d, oldlen = %ld\n",
__func__, oldlen32, oldlen);
#endif
return EINVAL;
}
/*
* set caller's oldlen, even if we got an error
*/
if (NETBSD32PTR64(ls32.oldlenp)) {
int nerror;
nerror = copyout(&oldlen32,
NETBSD32PTR64(ls32.oldlenp), sizeof(oldlen32));
if (error == 0)
error = nerror;
}
/*
* oldlen was too short
*/
if ((error == 0) &&
(NETBSD32PTR64(ls32.oldval) != NULL) &&
(savelen < oldlen32))
error = ENOMEM;
return error;
}