linux_timer.c revision 272020 
1/*-
2 * Copyright (c) 2014 Bjoern A. Zeeb
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
7 * ("MRC2"), as part of the DARPA MRC research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_timer.c 272020 2014-09-23 07:50:04Z bz $");
32
33#include "opt_compat.h"
34
35#include <sys/param.h>
36#include <sys/errno.h>
37#include <sys/signal.h>
38#include <sys/syscallsubr.h>
39#include <sys/systm.h>
40#include <sys/time.h>
41#include <sys/types.h>
42
43#ifdef COMPAT_LINUX32
44#include <machine/../linux32/linux.h>
45#include <machine/../linux32/linux32_proto.h>
46#else
47#include <machine/../linux/linux.h>
48#include <machine/../linux/linux_proto.h>
49#endif
50#include <compat/linux/linux_timer.h>
51
52static int
53linux_convert_l_clockid(clockid_t *clock_id)
54{
55
56	switch (*clock_id) {
57	case LINUX_CLOCK_REALTIME:
58		*clock_id = CLOCK_REALTIME;
59		break;
60	case LINUX_CLOCK_MONOTONIC:
61		*clock_id = CLOCK_MONOTONIC;
62		break;
63	default:
64		return (EINVAL);
65	}
66
67	return (0);
68}
69
70static int
71linux_convert_l_sigevent(struct l_sigevent *l_sig, struct sigevent *sig)
72{
73
74	CP(*l_sig, *sig, sigev_notify);
75	switch (l_sig->sigev_notify) {
76	case L_SIGEV_SIGNAL:
77		sig->sigev_notify = SIGEV_SIGNAL;
78		CP(*l_sig, *sig, sigev_signo);
79		PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
80		break;
81	case L_SIGEV_NONE:
82		sig->sigev_notify = SIGEV_NONE;
83		break;
84	case L_SIGEV_THREAD:
85#if 0
86		/* Seems to not be used anywhere (anymore)? */
87		sig->sigev_notify = SIGEV_THREAD;
88		return (ENOSYS);
89#else
90		return (EINVAL);
91#endif
92	case L_SIGEV_THREAD_ID:
93		sig->sigev_notify = SIGEV_THREAD_ID;
94		CP2(*l_sig, *sig, _l_sigev_un._tid, sigev_notify_thread_id);
95		CP(*l_sig, *sig, sigev_signo);
96		PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
97		break;
98	default:
99		return (EINVAL);
100	}
101	return (0);
102}
103
104int
105linux_timer_create(struct thread *td, struct linux_timer_create_args *uap)
106{
107	struct l_sigevent l_ev;
108	struct sigevent ev, *evp;
109	int error, id;
110
111	if (uap->evp == NULL) {
112		evp = NULL;
113	} else {
114		error = copyin(uap->evp, &l_ev, sizeof(l_ev));
115		if (error != 0)
116			return (error);
117		error = linux_convert_l_sigevent(&l_ev, &ev);
118		if (error != 0)
119			return (error);
120		evp = &ev;
121	}
122	error = linux_convert_l_clockid(&uap->clock_id);
123	if (error != 0)
124		return (error);
125	error = kern_ktimer_create(td, uap->clock_id, evp, &id, -1);
126	if (error == 0) {
127		error = copyout(&id, uap->timerid, sizeof(int));
128		if (error != 0)
129			kern_ktimer_delete(td, id);
130	}
131	return (error);
132}
133
134int
135linux_timer_settime(struct thread *td, struct linux_timer_settime_args *uap)
136{
137	struct l_itimerspec l_val, l_oval;
138	struct itimerspec val, oval, *ovalp;
139	int error;
140
141	error = copyin(uap->new, &l_val, sizeof(l_val));
142	if (error != 0)
143		return (error);
144	ITS_CP(l_val, val);
145	ovalp = uap->old != NULL ? &oval : NULL;
146	error = kern_ktimer_settime(td, uap->timerid, uap->flags, &val, ovalp);
147	if (error == 0 && uap->old != NULL) {
148		ITS_CP(oval, l_oval);
149		error = copyout(&l_oval, uap->old, sizeof(l_oval));
150	}
151	return (error);
152}
153
154int
155linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
156{
157	struct l_itimerspec l_val;
158	struct itimerspec val;
159	int error;
160
161	error = kern_ktimer_gettime(td, uap->timerid, &val);
162	if (error == 0) {
163		ITS_CP(val, l_val);
164		error = copyout(&l_val, uap->setting, sizeof(l_val));
165	}
166	return (error);
167}
168
169int
170linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
171{
172
173	return (kern_ktimer_getoverrun(td, uap->timerid));
174}
175
176int
177linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
178{
179
180	return (kern_ktimer_delete(td, uap->timerid));
181}
182
183