linux_timer.c revision 321012 
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 321012 2017-07-15 15:08:18Z dchagin $");
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
52
53static int
54linux_convert_l_sigevent(struct l_sigevent *l_sig, struct sigevent *sig)
55{
56
57	CP(*l_sig, *sig, sigev_notify);
58	switch (l_sig->sigev_notify) {
59	case L_SIGEV_SIGNAL:
60		if (!LINUX_SIG_VALID(l_sig->sigev_signo))
61			return (EINVAL);
62		sig->sigev_notify = SIGEV_SIGNAL;
63		sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
64		PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
65		break;
66	case L_SIGEV_NONE:
67		sig->sigev_notify = SIGEV_NONE;
68		break;
69	case L_SIGEV_THREAD:
70#if 0
71		/* Seems to not be used anywhere (anymore)? */
72		sig->sigev_notify = SIGEV_THREAD;
73		return (ENOSYS);
74#else
75		return (EINVAL);
76#endif
77	case L_SIGEV_THREAD_ID:
78		if (!LINUX_SIG_VALID(l_sig->sigev_signo))
79			return (EINVAL);
80		sig->sigev_notify = SIGEV_THREAD_ID;
81		CP2(*l_sig, *sig, _l_sigev_un._tid, sigev_notify_thread_id);
82		sig->sigev_signo = linux_to_bsd_signal(l_sig->sigev_signo);
83		PTRIN_CP(*l_sig, *sig, sigev_value.sival_ptr);
84		break;
85	default:
86		return (EINVAL);
87	}
88	return (0);
89}
90
91int
92linux_timer_create(struct thread *td, struct linux_timer_create_args *uap)
93{
94	struct l_sigevent l_ev;
95	struct sigevent ev, *evp;
96	clockid_t nwhich;
97	int error, id;
98
99	if (uap->evp == NULL) {
100		evp = NULL;
101	} else {
102		error = copyin(uap->evp, &l_ev, sizeof(l_ev));
103		if (error != 0)
104			return (error);
105		error = linux_convert_l_sigevent(&l_ev, &ev);
106		if (error != 0)
107			return (error);
108		evp = &ev;
109	}
110	error = linux_to_native_clockid(&nwhich, uap->clock_id);
111	if (error != 0)
112		return (error);
113	error = kern_ktimer_create(td, nwhich, evp, &id, -1);
114	if (error == 0) {
115		error = copyout(&id, uap->timerid, sizeof(int));
116		if (error != 0)
117			kern_ktimer_delete(td, id);
118	}
119	return (error);
120}
121
122int
123linux_timer_settime(struct thread *td, struct linux_timer_settime_args *uap)
124{
125	struct l_itimerspec l_val, l_oval;
126	struct itimerspec val, oval, *ovalp;
127	int error;
128
129	error = copyin(uap->new, &l_val, sizeof(l_val));
130	if (error != 0)
131		return (error);
132	ITS_CP(l_val, val);
133	ovalp = uap->old != NULL ? &oval : NULL;
134	error = kern_ktimer_settime(td, uap->timerid, uap->flags, &val, ovalp);
135	if (error == 0 && uap->old != NULL) {
136		ITS_CP(oval, l_oval);
137		error = copyout(&l_oval, uap->old, sizeof(l_oval));
138	}
139	return (error);
140}
141
142int
143linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
144{
145	struct l_itimerspec l_val;
146	struct itimerspec val;
147	int error;
148
149	error = kern_ktimer_gettime(td, uap->timerid, &val);
150	if (error == 0) {
151		ITS_CP(val, l_val);
152		error = copyout(&l_val, uap->setting, sizeof(l_val));
153	}
154	return (error);
155}
156
157int
158linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
159{
160
161	return (kern_ktimer_getoverrun(td, uap->timerid));
162}
163
164int
165linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
166{
167
168	return (kern_ktimer_delete(td, uap->timerid));
169}
170