248 lines
7.4 KiB
C
248 lines
7.4 KiB
C
/* $NetBSD: linux32_sysctl.c,v 1.6 2007/08/15 12:07:30 ad Exp $ */
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/*-
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* Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Emmanuel Dreyfus
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* 4. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux32_sysctl.c,v 1.6 2007/08/15 12:07:30 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/syscallargs.h>
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#include <sys/ktrace.h>
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#include <compat/netbsd32/netbsd32.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_sysctl.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/linux32/common/linux32_types.h>
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#include <compat/linux32/common/linux32_signal.h>
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#include <compat/linux32/common/linux32_sysctl.h>
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#include <compat/linux32/linux32_syscallargs.h>
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char linux32_sysname[128] = "Linux";
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char linux32_release[128] = "2.4.18";
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char linux32_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
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SYSCTL_SETUP(sysctl_emul_linux32_setup, "sysctl emul.linux32 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, "linux32",
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SYSCTL_DESCR("Linux 32 bit emulation settings"),
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NULL, 0, NULL, 0,
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CTL_EMUL, EMUL_LINUX32, 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 32 bit kernel emulation settings"),
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NULL, 0, NULL, 0,
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CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_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 32 bit operating system type"),
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NULL, 0, linux32_sysname, sizeof(linux32_sysname),
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CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
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EMUL_LINUX32_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 32 bit operating system release"),
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NULL, 0, linux32_release, sizeof(linux32_release),
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CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
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EMUL_LINUX32_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 32 bit operating system revision"),
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NULL, 0, linux32_version, sizeof(linux32_version),
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CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN,
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EMUL_LINUX32_KERN_VERSION, CTL_EOL);
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}
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#ifndef _LKM
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static
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#endif
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struct sysctlnode linux32_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 = "(linux32_root)",
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sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)),
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};
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SYSCTL_SETUP(linux32_sysctl_setup, "linux32 emulated sysctl subtree setup")
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{
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const struct sysctlnode *node = &linux32_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, linux32_sysname, sizeof(linux32_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, linux32_release, sizeof(linux32_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, linux32_version, sizeof(linux32_version),
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LINUX_KERN_VERSION, CTL_EOL);
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linux32_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE;
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}
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int
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linux32_sys___sysctl(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux32_sys___sysctl_args /* {
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syscallarg(linux32___sysctlp_t) lsp;
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} */ *uap = v;
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struct linux32_sysctl ls32;
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int name[CTL_MAXNAME];
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size_t savelen;
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netbsd32_size_t oldlen32;
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size_t oldlen;
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int error;
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/*
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* Read sysctl arguments
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*/
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if ((error = copyin(SCARG_P32(uap, lsp), &ls32, sizeof(ls32))) != 0)
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return error;
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/*
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* Read oldlen
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*/
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if (NETBSD32PTR64(ls32.oldlenp) != NULL) {
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if ((error = copyin(NETBSD32PTR64(ls32.oldlenp),
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&oldlen32, sizeof(oldlen32))) != 0)
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return error;
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} else {
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oldlen32 = 0;
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}
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savelen = (size_t)oldlen32;
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/*
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* Sanity check nlen
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*/
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if ((ls32.nlen > CTL_MAXNAME) || (ls32.nlen < 1))
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return EINVAL;
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/*
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* Read the sysctl name
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*/
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if ((error = copyin(NETBSD32PTR64(ls32.name), &name,
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ls32.nlen * sizeof(int))) != 0)
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return error;
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ktrmib(name, ls32.nlen);
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if ((error = sysctl_lock(l,
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NETBSD32PTR64(ls32.oldval), savelen)) != 0)
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return error;
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/*
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* First try linux32 tree, then linux tree
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*/
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oldlen = (size_t)oldlen32;
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error = sysctl_dispatch(name, ls32.nlen,
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NETBSD32PTR64(ls32.oldval), &oldlen,
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NETBSD32PTR64(ls32.newval), ls32.newlen,
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name, l, &linux32_sysctl_root);
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oldlen32 = (netbsd32_size_t)oldlen;
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sysctl_unlock(l);
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/*
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* Check for oldlen overflow (not likely, but who knows...)
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*/
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if (oldlen != oldlen32) {
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#ifdef DEBUG_LINUX
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printf("%s: oldlen32 = %d, oldlen = %ld\n",
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__func__, oldlen32, oldlen);
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#endif
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return EINVAL;
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}
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/*
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* set caller's oldlen, even if we got an error
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*/
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if (NETBSD32PTR64(ls32.oldlenp)) {
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int nerror;
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nerror = copyout(&oldlen32,
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NETBSD32PTR64(ls32.oldlenp), sizeof(oldlen32));
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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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* oldlen was too short
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*/
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if ((error == 0) &&
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(NETBSD32PTR64(ls32.oldval) != NULL) &&
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(savelen < oldlen32))
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error = ENOMEM;
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return error;
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}
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