xref: /freebsd/sys/compat/linux/linux_timer.c (revision 0957b409)
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("$FreeBSD$");
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 
53 static int
54 linux_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 
91 int
92 linux_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 
122 int
123 linux_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 
142 int
143 linux_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 
157 int
158 linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
159 {
160 
161 	return (kern_ktimer_getoverrun(td, uap->timerid));
162 }
163 
164 int
165 linux_timer_delete(struct thread *td, struct linux_timer_delete_args *uap)
166 {
167 
168 	return (kern_ktimer_delete(td, uap->timerid));
169 }
170