1 /*-
2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28
29 #include <sys/param.h>
30 #include <sys/proc.h>
31 #include <sys/stdint.h>
32 #include <sys/syscallsubr.h>
33
34 #include <compat/cloudabi/cloudabi_proto.h>
35 #include <compat/cloudabi/cloudabi_syscalldefs.h>
36 #include <compat/cloudabi/cloudabi_util.h>
37
38 /* Converts a CloudABI clock ID to a FreeBSD clock ID. */
39 static int
cloudabi_convert_clockid(cloudabi_clockid_t in,clockid_t * out)40 cloudabi_convert_clockid(cloudabi_clockid_t in, clockid_t *out)
41 {
42 switch (in) {
43 case CLOUDABI_CLOCK_MONOTONIC:
44 *out = CLOCK_MONOTONIC;
45 return (0);
46 case CLOUDABI_CLOCK_PROCESS_CPUTIME_ID:
47 *out = CLOCK_PROCESS_CPUTIME_ID;
48 return (0);
49 case CLOUDABI_CLOCK_REALTIME:
50 *out = CLOCK_REALTIME;
51 return (0);
52 case CLOUDABI_CLOCK_THREAD_CPUTIME_ID:
53 *out = CLOCK_THREAD_CPUTIME_ID;
54 return (0);
55 default:
56 return (EINVAL);
57 }
58 }
59
60 /* Converts a struct timespec to a CloudABI timestamp. */
61 int
cloudabi_convert_timespec(const struct timespec * in,cloudabi_timestamp_t * out)62 cloudabi_convert_timespec(const struct timespec *in, cloudabi_timestamp_t *out)
63 {
64 cloudabi_timestamp_t s, ns;
65
66 if (in->tv_sec < 0) {
67 /* Timestamps from before the Epoch cannot be expressed. */
68 *out = 0;
69 return (EOVERFLOW);
70 }
71 s = in->tv_sec;
72 ns = in->tv_nsec;
73 if (s > UINT64_MAX / 1000000000 ||
74 (s == UINT64_MAX / 1000000000 && ns > UINT64_MAX % 1000000000)) {
75 /* Addition of seconds and nanoseconds would overflow. */
76 *out = UINT64_MAX;
77 return (EOVERFLOW);
78 }
79 *out = s * 1000000000 + ns;
80 return (0);
81 }
82
83 /* Fetches the time value of a clock. */
84 int
cloudabi_clock_time_get(struct thread * td,cloudabi_clockid_t clock_id,cloudabi_timestamp_t * ret)85 cloudabi_clock_time_get(struct thread *td, cloudabi_clockid_t clock_id,
86 cloudabi_timestamp_t *ret)
87 {
88 struct timespec ts;
89 int error;
90 clockid_t clockid;
91
92 error = cloudabi_convert_clockid(clock_id, &clockid);
93 if (error != 0)
94 return (error);
95 error = kern_clock_gettime(td, clockid, &ts);
96 if (error != 0)
97 return (error);
98 return (cloudabi_convert_timespec(&ts, ret));
99 }
100
101 int
cloudabi_sys_clock_res_get(struct thread * td,struct cloudabi_sys_clock_res_get_args * uap)102 cloudabi_sys_clock_res_get(struct thread *td,
103 struct cloudabi_sys_clock_res_get_args *uap)
104 {
105 struct timespec ts;
106 cloudabi_timestamp_t cts;
107 int error;
108 clockid_t clockid;
109
110 error = cloudabi_convert_clockid(uap->clock_id, &clockid);
111 if (error != 0)
112 return (error);
113 error = kern_clock_getres(td, clockid, &ts);
114 if (error != 0)
115 return (error);
116 error = cloudabi_convert_timespec(&ts, &cts);
117 if (error != 0)
118 return (error);
119 td->td_retval[0] = cts;
120 return (0);
121 }
122
123 int
cloudabi_sys_clock_time_get(struct thread * td,struct cloudabi_sys_clock_time_get_args * uap)124 cloudabi_sys_clock_time_get(struct thread *td,
125 struct cloudabi_sys_clock_time_get_args *uap)
126 {
127 cloudabi_timestamp_t ts;
128 int error;
129
130 error = cloudabi_clock_time_get(td, uap->clock_id, &ts);
131 td->td_retval[0] = ts;
132 return (error);
133 }
134