linux_time.c revision 204523 
1/*	$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $ */
2
3/*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Emmanuel Dreyfus.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/sys/compat/linux/linux_time.c 204523 2010-03-01 17:20:04Z joel $");
34#if 0
35__KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.14 2006/05/14 03:40:54 christos Exp $");
36#endif
37
38#include "opt_compat.h"
39
40#include <sys/param.h>
41#include <sys/ucred.h>
42#include <sys/mount.h>
43#include <sys/signal.h>
44#include <sys/stdint.h>
45#include <sys/syscallsubr.h>
46#include <sys/sysproto.h>
47#include <sys/time.h>
48#include <sys/systm.h>
49#include <sys/proc.h>
50
51#ifdef COMPAT_LINUX32
52#include <machine/../linux32/linux.h>
53#include <machine/../linux32/linux32_proto.h>
54#else
55#include <machine/../linux/linux.h>
56#include <machine/../linux/linux_proto.h>
57#endif
58
59static void native_to_linux_timespec(struct l_timespec *,
60				     struct timespec *);
61static int linux_to_native_timespec(struct timespec *,
62				     struct l_timespec *);
63static int linux_to_native_clockid(clockid_t *, clockid_t);
64
65static void
66native_to_linux_timespec(struct l_timespec *ltp, struct timespec *ntp)
67{
68	ltp->tv_sec = ntp->tv_sec;
69	ltp->tv_nsec = ntp->tv_nsec;
70}
71
72static int
73linux_to_native_timespec(struct timespec *ntp, struct l_timespec *ltp)
74{
75	if (ltp->tv_sec < 0 || ltp->tv_nsec > (l_long)999999999L)
76		return (EINVAL);
77	ntp->tv_sec = ltp->tv_sec;
78	ntp->tv_nsec = ltp->tv_nsec;
79
80	return (0);
81}
82
83static int
84linux_to_native_clockid(clockid_t *n, clockid_t l)
85{
86	switch (l) {
87	case LINUX_CLOCK_REALTIME:
88		*n = CLOCK_REALTIME;
89		break;
90	case LINUX_CLOCK_MONOTONIC:
91		*n = CLOCK_MONOTONIC;
92		break;
93	case LINUX_CLOCK_PROCESS_CPUTIME_ID:
94	case LINUX_CLOCK_THREAD_CPUTIME_ID:
95	case LINUX_CLOCK_REALTIME_HR:
96	case LINUX_CLOCK_MONOTONIC_HR:
97	default:
98		return (EINVAL);
99		break;
100	}
101
102	return (0);
103}
104
105int
106linux_clock_gettime(struct thread *td, struct linux_clock_gettime_args *args)
107{
108	struct l_timespec lts;
109	int error;
110	clockid_t nwhich = 0;	/* XXX: GCC */
111	struct timespec tp;
112
113	error = linux_to_native_clockid(&nwhich, args->which);
114	if (error != 0)
115		return (error);
116	error = kern_clock_gettime(td, nwhich, &tp);
117	if (error != 0)
118		return (error);
119	native_to_linux_timespec(&lts, &tp);
120
121	return (copyout(&lts, args->tp, sizeof lts));
122}
123
124int
125linux_clock_settime(struct thread *td, struct linux_clock_settime_args *args)
126{
127	struct timespec ts;
128	struct l_timespec lts;
129	int error;
130	clockid_t nwhich = 0;	/* XXX: GCC */
131
132	error = linux_to_native_clockid(&nwhich, args->which);
133	if (error != 0)
134		return (error);
135	error = copyin(args->tp, &lts, sizeof lts);
136	if (error != 0)
137		return (error);
138	error = linux_to_native_timespec(&ts, &lts);
139	if (error != 0)
140		return (error);
141
142	return (kern_clock_settime(td, nwhich, &ts));
143}
144
145int
146linux_clock_getres(struct thread *td, struct linux_clock_getres_args *args)
147{
148	struct timespec ts;
149	struct l_timespec lts;
150	int error;
151	clockid_t nwhich = 0;	/* XXX: GCC */
152
153	if (args->tp == NULL)
154	  	return (0);
155
156	error = linux_to_native_clockid(&nwhich, args->which);
157	if (error != 0)
158		return (error);
159	error = kern_clock_getres(td, nwhich, &ts);
160	if (error != 0)
161		return (error);
162	native_to_linux_timespec(&lts, &ts);
163
164	return (copyout(&lts, args->tp, sizeof lts));
165}
166
167int
168linux_nanosleep(struct thread *td, struct linux_nanosleep_args *args)
169{
170	struct timespec *rmtp;
171	struct l_timespec lrqts, lrmts;
172	struct timespec rqts, rmts;
173	int error;
174
175	error = copyin(args->rqtp, &lrqts, sizeof lrqts);
176	if (error != 0)
177		return (error);
178
179	if (args->rmtp != NULL)
180	   	rmtp = &rmts;
181	else
182	   	rmtp = NULL;
183
184	error = linux_to_native_timespec(&rqts, &lrqts);
185	if (error != 0)
186		return (error);
187	error = kern_nanosleep(td, &rqts, rmtp);
188	if (error != 0)
189		return (error);
190
191	if (args->rmtp != NULL) {
192	   	native_to_linux_timespec(&lrmts, rmtp);
193	   	error = copyout(&lrmts, args->rmtp, sizeof(lrmts));
194		if (error != 0)
195		   	return (error);
196	}
197
198	return (0);
199}
200
201int
202linux_clock_nanosleep(struct thread *td, struct linux_clock_nanosleep_args *args)
203{
204	struct timespec *rmtp;
205	struct l_timespec lrqts, lrmts;
206	struct timespec rqts, rmts;
207	int error;
208
209	if (args->flags != 0)
210		return (EINVAL);	/* XXX deal with TIMER_ABSTIME */
211
212	if (args->which != LINUX_CLOCK_REALTIME)
213		return (EINVAL);
214
215	error = copyin(args->rqtp, &lrqts, sizeof lrqts);
216	if (error != 0)
217		return (error);
218
219	if (args->rmtp != NULL)
220	   	rmtp = &rmts;
221	else
222	   	rmtp = NULL;
223
224	error = linux_to_native_timespec(&rqts, &lrqts);
225	if (error != 0)
226		return (error);
227	error = kern_nanosleep(td, &rqts, rmtp);
228	if (error != 0)
229		return (error);
230
231	if (args->rmtp != NULL) {
232	   	native_to_linux_timespec(&lrmts, rmtp);
233	   	error = copyout(&lrmts, args->rmtp, sizeof lrmts );
234		if (error != 0)
235		   	return (error);
236	}
237
238	return (0);
239}
240