15002a60fSMarcel Moolenaar /*-
24d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
37f2d13d6SPedro F. Giffuni *
45002a60fSMarcel Moolenaar * Copyright (c) 2001 Marcel Moolenaar
55002a60fSMarcel Moolenaar * All rights reserved.
65002a60fSMarcel Moolenaar *
75002a60fSMarcel Moolenaar * Redistribution and use in source and binary forms, with or without
85002a60fSMarcel Moolenaar * modification, are permitted provided that the following conditions
95002a60fSMarcel Moolenaar * are met:
105002a60fSMarcel Moolenaar * 1. Redistributions of source code must retain the above copyright
110ba1b365SEd Maste * notice, this list of conditions and the following disclaimer.
125002a60fSMarcel Moolenaar * 2. Redistributions in binary form must reproduce the above copyright
135002a60fSMarcel Moolenaar * notice, this list of conditions and the following disclaimer in the
145002a60fSMarcel Moolenaar * documentation and/or other materials provided with the distribution.
155002a60fSMarcel Moolenaar *
160ba1b365SEd Maste * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
170ba1b365SEd Maste * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
180ba1b365SEd Maste * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
190ba1b365SEd Maste * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
200ba1b365SEd Maste * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
210ba1b365SEd Maste * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
220ba1b365SEd Maste * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
230ba1b365SEd Maste * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
240ba1b365SEd Maste * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
250ba1b365SEd Maste * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
260ba1b365SEd Maste * SUCH DAMAGE.
275002a60fSMarcel Moolenaar */
285002a60fSMarcel Moolenaar
295002a60fSMarcel Moolenaar #include <sys/param.h>
30d7f94a7aSJonathan Mini #include <sys/lock.h>
3185422e62SBruce Evans #include <sys/malloc.h>
32d7f94a7aSJonathan Mini #include <sys/mutex.h>
33d7f94a7aSJonathan Mini #include <sys/sysctl.h>
34e15583ceSAlfred Perlstein #include <sys/sbuf.h>
35d8e53d94SDmitry Chagin #include <sys/vnode.h>
365002a60fSMarcel Moolenaar
371997c537SDavid E. O'Brien #ifdef COMPAT_LINUX32
384af27623STim J. Robbins #include <machine/../linux32/linux.h>
394af27623STim J. Robbins #include <machine/../linux32/linux32_proto.h>
401997c537SDavid E. O'Brien #else
411997c537SDavid E. O'Brien #include <machine/../linux/linux.h>
421997c537SDavid E. O'Brien #include <machine/../linux/linux_proto.h>
434af27623STim J. Robbins #endif
445002a60fSMarcel Moolenaar
4519e252baSAlexander Leidinger #include <compat/linux/linux_dtrace.h>
46d825ce0aSJohn Baldwin #include <compat/linux/linux_misc.h>
47e15583ceSAlfred Perlstein #include <compat/linux/linux_util.h>
48e15583ceSAlfred Perlstein
495002a60fSMarcel Moolenaar #define LINUX_CTL_KERN 1
505002a60fSMarcel Moolenaar #define LINUX_CTL_VM 2
515002a60fSMarcel Moolenaar #define LINUX_CTL_NET 3
525002a60fSMarcel Moolenaar #define LINUX_CTL_PROC 4
535002a60fSMarcel Moolenaar #define LINUX_CTL_FS 5
545002a60fSMarcel Moolenaar #define LINUX_CTL_DEBUG 6
555002a60fSMarcel Moolenaar #define LINUX_CTL_DEV 7
565002a60fSMarcel Moolenaar #define LINUX_CTL_BUS 8
575002a60fSMarcel Moolenaar
585002a60fSMarcel Moolenaar /* CTL_KERN names */
595002a60fSMarcel Moolenaar #define LINUX_KERN_OSTYPE 1
605002a60fSMarcel Moolenaar #define LINUX_KERN_OSRELEASE 2
615002a60fSMarcel Moolenaar #define LINUX_KERN_OSREV 3
625002a60fSMarcel Moolenaar #define LINUX_KERN_VERSION 4
635002a60fSMarcel Moolenaar
6419e252baSAlexander Leidinger /* DTrace init */
6519e252baSAlexander Leidinger LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
6619e252baSAlexander Leidinger
6719e252baSAlexander Leidinger /**
6819e252baSAlexander Leidinger * DTrace probes in this module.
6919e252baSAlexander Leidinger */
7019e252baSAlexander Leidinger LIN_SDT_PROBE_DEFINE1(sysctl, handle_string, copyout_error, "int");
7119e252baSAlexander Leidinger LIN_SDT_PROBE_DEFINE1(sysctl, linux_sysctl, copyin_error, "int");
7219e252baSAlexander Leidinger LIN_SDT_PROBE_DEFINE2(sysctl, linux_sysctl, wrong_length, "int", "int");
7319e252baSAlexander Leidinger LIN_SDT_PROBE_DEFINE1(sysctl, linux_sysctl, unsupported_sysctl, "char *");
7419e252baSAlexander Leidinger
759c42fa94SEd Maste #ifdef LINUX_LEGACY_SYSCALLS
765002a60fSMarcel Moolenaar static int
handle_string(struct l___sysctl_args * la,char * value)775002a60fSMarcel Moolenaar handle_string(struct l___sysctl_args *la, char *value)
785002a60fSMarcel Moolenaar {
795002a60fSMarcel Moolenaar int error;
805002a60fSMarcel Moolenaar
814af27623STim J. Robbins if (la->oldval != 0) {
825002a60fSMarcel Moolenaar l_int len = strlen(value);
834af27623STim J. Robbins error = copyout(value, PTRIN(la->oldval), len + 1);
844af27623STim J. Robbins if (!error && la->oldlenp != 0)
854af27623STim J. Robbins error = copyout(&len, PTRIN(la->oldlenp), sizeof(len));
8619e252baSAlexander Leidinger if (error) {
8719e252baSAlexander Leidinger LIN_SDT_PROBE1(sysctl, handle_string, copyout_error,
8819e252baSAlexander Leidinger error);
895002a60fSMarcel Moolenaar return (error);
905002a60fSMarcel Moolenaar }
9119e252baSAlexander Leidinger }
925002a60fSMarcel Moolenaar
935e8caee2SEdward Tomasz Napierala if (la->newval != 0)
945002a60fSMarcel Moolenaar return (ENOTDIR);
955002a60fSMarcel Moolenaar
965002a60fSMarcel Moolenaar return (0);
975002a60fSMarcel Moolenaar }
985002a60fSMarcel Moolenaar
995002a60fSMarcel Moolenaar int
linux_sysctl(struct thread * td,struct linux_sysctl_args * args)100b40ce416SJulian Elischer linux_sysctl(struct thread *td, struct linux_sysctl_args *args)
1015002a60fSMarcel Moolenaar {
1025002a60fSMarcel Moolenaar struct l___sysctl_args la;
103e15583ceSAlfred Perlstein struct sbuf *sb;
1045002a60fSMarcel Moolenaar l_int *mib;
10519e252baSAlexander Leidinger char *sysctl_string;
1065002a60fSMarcel Moolenaar int error, i;
1075002a60fSMarcel Moolenaar
10819e252baSAlexander Leidinger error = copyin(args->args, &la, sizeof(la));
10919e252baSAlexander Leidinger if (error) {
11019e252baSAlexander Leidinger LIN_SDT_PROBE1(sysctl, linux_sysctl, copyin_error, error);
11119e252baSAlexander Leidinger return (error);
11219e252baSAlexander Leidinger }
11319e252baSAlexander Leidinger
11419e252baSAlexander Leidinger if (la.nlen <= 0 || la.nlen > LINUX_CTL_MAXNAME) {
11519e252baSAlexander Leidinger LIN_SDT_PROBE2(sysctl, linux_sysctl, wrong_length, la.nlen,
11619e252baSAlexander Leidinger LINUX_CTL_MAXNAME);
1175002a60fSMarcel Moolenaar return (ENOTDIR);
11819e252baSAlexander Leidinger }
1195002a60fSMarcel Moolenaar
120e0d3ea8cSDmitry Chagin mib = malloc(la.nlen * sizeof(l_int), M_LINUX, M_WAITOK);
1214af27623STim J. Robbins error = copyin(PTRIN(la.name), mib, la.nlen * sizeof(l_int));
122206a5d3aSIan Dowse if (error) {
12319e252baSAlexander Leidinger LIN_SDT_PROBE1(sysctl, linux_sysctl, copyin_error, error);
124e0d3ea8cSDmitry Chagin free(mib, M_LINUX);
1255002a60fSMarcel Moolenaar return (error);
126206a5d3aSIan Dowse }
1275002a60fSMarcel Moolenaar
1285002a60fSMarcel Moolenaar switch (mib[0]) {
1295002a60fSMarcel Moolenaar case LINUX_CTL_KERN:
1305002a60fSMarcel Moolenaar if (la.nlen < 2)
1315002a60fSMarcel Moolenaar break;
1325002a60fSMarcel Moolenaar
1335002a60fSMarcel Moolenaar switch (mib[1]) {
1345002a60fSMarcel Moolenaar case LINUX_KERN_VERSION:
135206a5d3aSIan Dowse error = handle_string(&la, version);
136e0d3ea8cSDmitry Chagin free(mib, M_LINUX);
137206a5d3aSIan Dowse return (error);
1385002a60fSMarcel Moolenaar default:
1395002a60fSMarcel Moolenaar break;
1405002a60fSMarcel Moolenaar }
1415002a60fSMarcel Moolenaar break;
1425002a60fSMarcel Moolenaar default:
1435002a60fSMarcel Moolenaar break;
1445002a60fSMarcel Moolenaar }
1455002a60fSMarcel Moolenaar
146e15583ceSAlfred Perlstein sb = sbuf_new(NULL, NULL, 20 + la.nlen * 5, SBUF_AUTOEXTEND);
147e15583ceSAlfred Perlstein if (sb == NULL) {
148e15583ceSAlfred Perlstein linux_msg(td, "sysctl is not implemented");
14919e252baSAlexander Leidinger LIN_SDT_PROBE1(sysctl, linux_sysctl, unsupported_sysctl,
15019e252baSAlexander Leidinger "unknown sysctl, ENOMEM during lookup");
151e15583ceSAlfred Perlstein } else {
152e15583ceSAlfred Perlstein sbuf_printf(sb, "sysctl ");
1535002a60fSMarcel Moolenaar for (i = 0; i < la.nlen; i++)
154e15583ceSAlfred Perlstein sbuf_printf(sb, "%c%d", (i) ? ',' : '{', mib[i]);
155e15583ceSAlfred Perlstein sbuf_printf(sb, "} is not implemented");
156e15583ceSAlfred Perlstein sbuf_finish(sb);
15719e252baSAlexander Leidinger sysctl_string = sbuf_data(sb);
15893494e42SMateusz Guzik linux_msg(td, "%s", sysctl_string);
15919e252baSAlexander Leidinger LIN_SDT_PROBE1(sysctl, linux_sysctl, unsupported_sysctl,
16019e252baSAlexander Leidinger sysctl_string);
161e15583ceSAlfred Perlstein sbuf_delete(sb);
162e15583ceSAlfred Perlstein }
1635002a60fSMarcel Moolenaar
164e0d3ea8cSDmitry Chagin free(mib, M_LINUX);
16519e252baSAlexander Leidinger
1665002a60fSMarcel Moolenaar return (ENOTDIR);
1675002a60fSMarcel Moolenaar }
168931e2a1aSEd Maste #endif
169