1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #define _GNU_SOURCE
3*4882a593Smuzhiyun #include <sched.h>
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <sys/timerfd.h>
6*4882a593Smuzhiyun #include <sys/syscall.h>
7*4882a593Smuzhiyun #include <sys/types.h>
8*4882a593Smuzhiyun #include <sys/wait.h>
9*4882a593Smuzhiyun #include <time.h>
10*4882a593Smuzhiyun #include <unistd.h>
11*4882a593Smuzhiyun #include <stdlib.h>
12*4882a593Smuzhiyun #include <stdio.h>
13*4882a593Smuzhiyun #include <stdint.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "log.h"
16*4882a593Smuzhiyun #include "timens.h"
17*4882a593Smuzhiyun
tclock_gettime(clock_t clockid,struct timespec * now)18*4882a593Smuzhiyun static int tclock_gettime(clock_t clockid, struct timespec *now)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun if (clockid == CLOCK_BOOTTIME_ALARM)
21*4882a593Smuzhiyun clockid = CLOCK_BOOTTIME;
22*4882a593Smuzhiyun return clock_gettime(clockid, now);
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
run_test(int clockid,struct timespec now)25*4882a593Smuzhiyun int run_test(int clockid, struct timespec now)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct itimerspec new_value;
28*4882a593Smuzhiyun long long elapsed;
29*4882a593Smuzhiyun int fd, i;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (check_skip(clockid))
32*4882a593Smuzhiyun return 0;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun if (tclock_gettime(clockid, &now))
35*4882a593Smuzhiyun return pr_perror("clock_gettime(%d)", clockid);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun for (i = 0; i < 2; i++) {
38*4882a593Smuzhiyun int flags = 0;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun new_value.it_value.tv_sec = 3600;
41*4882a593Smuzhiyun new_value.it_value.tv_nsec = 0;
42*4882a593Smuzhiyun new_value.it_interval.tv_sec = 1;
43*4882a593Smuzhiyun new_value.it_interval.tv_nsec = 0;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (i == 1) {
46*4882a593Smuzhiyun new_value.it_value.tv_sec += now.tv_sec;
47*4882a593Smuzhiyun new_value.it_value.tv_nsec += now.tv_nsec;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun fd = timerfd_create(clockid, 0);
51*4882a593Smuzhiyun if (fd == -1)
52*4882a593Smuzhiyun return pr_perror("timerfd_create(%d)", clockid);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (i == 1)
55*4882a593Smuzhiyun flags |= TFD_TIMER_ABSTIME;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun if (timerfd_settime(fd, flags, &new_value, NULL))
58*4882a593Smuzhiyun return pr_perror("timerfd_settime(%d)", clockid);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun if (timerfd_gettime(fd, &new_value))
61*4882a593Smuzhiyun return pr_perror("timerfd_gettime(%d)", clockid);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun elapsed = new_value.it_value.tv_sec;
64*4882a593Smuzhiyun if (abs(elapsed - 3600) > 60) {
65*4882a593Smuzhiyun ksft_test_result_fail("clockid: %d elapsed: %lld\n",
66*4882a593Smuzhiyun clockid, elapsed);
67*4882a593Smuzhiyun return 1;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun close(fd);
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun ksft_test_result_pass("clockid=%d\n", clockid);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun return 0;
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
main(int argc,char * argv[])78*4882a593Smuzhiyun int main(int argc, char *argv[])
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun int ret, status, len, fd;
81*4882a593Smuzhiyun char buf[4096];
82*4882a593Smuzhiyun pid_t pid;
83*4882a593Smuzhiyun struct timespec btime_now, mtime_now;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun nscheck();
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun check_supported_timers();
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun ksft_set_plan(3);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun clock_gettime(CLOCK_MONOTONIC, &mtime_now);
92*4882a593Smuzhiyun clock_gettime(CLOCK_BOOTTIME, &btime_now);
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun if (unshare_timens())
95*4882a593Smuzhiyun return 1;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
98*4882a593Smuzhiyun CLOCK_MONOTONIC, 70 * 24 * 3600,
99*4882a593Smuzhiyun CLOCK_BOOTTIME, 9 * 24 * 3600);
100*4882a593Smuzhiyun fd = open("/proc/self/timens_offsets", O_WRONLY);
101*4882a593Smuzhiyun if (fd < 0)
102*4882a593Smuzhiyun return pr_perror("/proc/self/timens_offsets");
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun if (write(fd, buf, len) != len)
105*4882a593Smuzhiyun return pr_perror("/proc/self/timens_offsets");
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun close(fd);
108*4882a593Smuzhiyun mtime_now.tv_sec += 70 * 24 * 3600;
109*4882a593Smuzhiyun btime_now.tv_sec += 9 * 24 * 3600;
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun pid = fork();
112*4882a593Smuzhiyun if (pid < 0)
113*4882a593Smuzhiyun return pr_perror("Unable to fork");
114*4882a593Smuzhiyun if (pid == 0) {
115*4882a593Smuzhiyun ret = 0;
116*4882a593Smuzhiyun ret |= run_test(CLOCK_BOOTTIME, btime_now);
117*4882a593Smuzhiyun ret |= run_test(CLOCK_MONOTONIC, mtime_now);
118*4882a593Smuzhiyun ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun if (ret)
121*4882a593Smuzhiyun ksft_exit_fail();
122*4882a593Smuzhiyun ksft_exit_pass();
123*4882a593Smuzhiyun return ret;
124*4882a593Smuzhiyun }
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun if (waitpid(pid, &status, 0) != pid)
127*4882a593Smuzhiyun return pr_perror("Unable to wait the child process");
128*4882a593Smuzhiyun
129*4882a593Smuzhiyun if (WIFEXITED(status))
130*4882a593Smuzhiyun return WEXITSTATUS(status);
131*4882a593Smuzhiyun
132*4882a593Smuzhiyun return 1;
133*4882a593Smuzhiyun }
134