223 lines
6.8 KiB
C
223 lines
6.8 KiB
C
/* $NetBSD: linux_sysctl.c,v 1.37 2008/11/12 12:36:10 ad Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Brown.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* sysctl system call.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.37 2008/11/12 12:36:10 ad Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <sys/sched.h>
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#include <sys/syscallargs.h>
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#include <sys/ktrace.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_ipc.h>
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#include <compat/linux/common/linux_sem.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/linux/common/linux_sysctl.h>
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#include <compat/linux/common/linux_exec.h>
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#include <compat/linux/common/linux_machdep.h>
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char linux_sysname[128] = "Linux";
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#if defined(__amd64__) || defined(__i386__) || defined(__powerpc__)
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char linux_release[128] = "2.4.18";
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char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
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#else
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char linux_release[128] = "2.0.38";
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char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000";
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#endif
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struct sysctlnode linux_sysctl_root = {
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.sysctl_flags = SYSCTL_VERSION|
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CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE,
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.sysctl_num = 0,
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.sysctl_name = "(linux_root)",
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sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)),
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};
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/*
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* setup for small sysctl tree used by emulation
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*/
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SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup")
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{
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const struct sysctlnode *node = &linux_sysctl_root;
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sysctl_createv(clog, 0, &node, &node,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "kern", NULL,
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NULL, 0, NULL, 0,
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LINUX_CTL_KERN, CTL_EOL);
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sysctl_createv(clog, 0, &node, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_STRING, "ostype", NULL,
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NULL, 0, linux_sysname, sizeof(linux_sysname),
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LINUX_KERN_OSTYPE, CTL_EOL);
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sysctl_createv(clog, 0, &node, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_STRING, "osrelease", NULL,
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NULL, 0, linux_release, sizeof(linux_release),
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LINUX_KERN_OSRELEASE, CTL_EOL);
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sysctl_createv(clog, 0, &node, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_STRING, "version", NULL,
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NULL, 0, linux_version, sizeof(linux_version),
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LINUX_KERN_VERSION, CTL_EOL);
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linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE;
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}
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/*
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* linux sysctl system call
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*/
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int
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linux_sys___sysctl(struct lwp *l, const struct linux_sys___sysctl_args *uap, register_t *retval)
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{
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struct linux___sysctl ls;
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int error, nerror, name[CTL_MAXNAME];
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size_t savelen = 0, oldlen = 0;
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/*
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* get linux args structure
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*/
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if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls))))
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return error;
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/*
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* get oldlen
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*/
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oldlen = 0;
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if (ls.oldlenp != NULL) {
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error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen));
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if (error)
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return (error);
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}
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savelen = oldlen;
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/*
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* top-level sysctl names may or may not be non-terminal, but
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* we don't care
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*/
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if (ls.nlen > CTL_MAXNAME || ls.nlen < 1)
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return (EINVAL);
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error = copyin(ls.name, &name, ls.nlen * sizeof(int));
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if (error)
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return (error);
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ktrmib(name, ls.nlen);
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/*
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* dispatch request into linux sysctl tree
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*/
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sysctl_lock(ls.newval != NULL);
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error = sysctl_dispatch(&name[0], ls.nlen,
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ls.oldval, &oldlen,
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ls.newval, ls.newlen,
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&name[0], l, &linux_sysctl_root);
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sysctl_unlock();
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/*
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* reset caller's oldlen, even if we got an error
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*/
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if (ls.oldlenp) {
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nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen));
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if (error == 0)
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error = nerror;
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}
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/*
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* if the only problem is that we weren't given enough space,
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* that's an ENOMEM error
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*/
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if (error == 0 && ls.oldval != NULL && savelen < oldlen)
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error = ENOMEM;
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return (error);
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}
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/*
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* kernel related system variables under emul.linux in the main sysctl
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* tree
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*/
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SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup")
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{
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "emul", NULL,
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NULL, 0, NULL, 0,
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CTL_EMUL, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "linux",
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SYSCTL_DESCR("Linux emulation settings"),
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NULL, 0, NULL, 0,
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CTL_EMUL, EMUL_LINUX, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "kern",
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SYSCTL_DESCR("Linux kernel emulation settings"),
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NULL, 0, NULL, 0,
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CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_STRING, "ostype",
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SYSCTL_DESCR("Linux operating system type"),
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NULL, 0, linux_sysname, sizeof(linux_sysname),
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CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
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EMUL_LINUX_KERN_OSTYPE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_STRING, "osrelease",
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SYSCTL_DESCR("Linux operating system release"),
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NULL, 0, linux_release, sizeof(linux_release),
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CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
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EMUL_LINUX_KERN_OSRELEASE, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
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CTLTYPE_STRING, "osversion",
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SYSCTL_DESCR("Linux operating system revision"),
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NULL, 0, linux_version, sizeof(linux_version),
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CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
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EMUL_LINUX_KERN_VERSION, CTL_EOL);
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}
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