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#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <sys/timerfd.h>
#include "zdtmtst.h"
const char *test_doc = "Checks timerfd survives checkpoint/restore\n";
const char *test_author = "Cyrill Gorcunov <gorcunov@openvz.org>";
#define TIMERFD_VNSEC 50000
#define TIMERFD_ISEC 4
struct timerfd_status {
int clockid;
uint64_t ticks;
int settime_flags;
struct itimerspec v;
};
static void show_timerfd(char *prefix, struct timerfd_status *s)
{
test_msg("\t%s clockid %d ticks %llu settime_flags %d it_value(%llu, %llu) it_interval(%llu, %llu)\n", prefix,
s->clockid, (unsigned long long)s->ticks, s->settime_flags, (unsigned long long)s->v.it_value.tv_sec,
(unsigned long long)s->v.it_value.tv_nsec, (unsigned long long)s->v.it_interval.tv_sec,
(unsigned long long)s->v.it_interval.tv_nsec);
}
static int parse_self_fdinfo(int fd, struct timerfd_status *s)
{
char buf[256];
int ret = -1;
FILE *f;
sprintf(buf, "/proc/self/fdinfo/%d", fd);
f = fopen(buf, "r");
if (!f) {
pr_perror("Can't open %s to parse", buf);
return -1;
}
memset(s, 0, sizeof(*s));
/*
* clockid: 0
* ticks: 0
* settime flags: 01
* it_value: (0, 49406829)
* it_interval: (1, 0)
*/
while (fgets(buf, sizeof(buf), f)) {
if (strncmp(buf, "clockid:", 8))
continue;
if (sscanf(buf, "clockid: %d", &s->clockid) != 1)
goto parse_err;
if (!fgets(buf, sizeof(buf), f))
goto parse_err;
if (sscanf(buf, "ticks: %llu", (unsigned long long *)&s->ticks) != 1)
goto parse_err;
if (!fgets(buf, sizeof(buf), f))
goto parse_err;
if (sscanf(buf, "settime flags: 0%o", &s->settime_flags) != 1)
goto parse_err;
if (!fgets(buf, sizeof(buf), f))
goto parse_err;
if (sscanf(buf, "it_value: (%llu, %llu)", (unsigned long long *)&s->v.it_value.tv_sec,
(unsigned long long *)&s->v.it_value.tv_nsec) != 2)
goto parse_err;
if (!fgets(buf, sizeof(buf), f))
goto parse_err;
if (sscanf(buf, "it_interval: (%llu, %llu)", (unsigned long long *)&s->v.it_interval.tv_sec,
(unsigned long long *)&s->v.it_interval.tv_nsec) != 2)
goto parse_err;
ret = 0;
break;
}
if (ret)
goto parse_err;
err:
fclose(f);
return ret;
parse_err:
pr_perror("Format error");
goto err;
}
static int check_timerfd(int fd, struct timerfd_status *old)
{
struct timerfd_status new;
if (parse_self_fdinfo(fd, &new))
return -1;
show_timerfd("restored", &new);
if (old->clockid != new.clockid || old->settime_flags != new.settime_flags || old->ticks > new.ticks ||
old->v.it_value.tv_sec > new.v.it_value.tv_sec || old->v.it_interval.tv_sec != new.v.it_interval.tv_sec)
return -1;
return 0;
}
int main(int argc, char *argv[])
{
struct timerfd_status old = {
.clockid = CLOCK_MONOTONIC,
.ticks = 0,
.settime_flags = 0,
.v = {
.it_value = {
.tv_sec = 0,
.tv_nsec= TIMERFD_VNSEC,
},
.it_interval = {
.tv_sec = TIMERFD_ISEC,
.tv_nsec= 0,
},
},
};
int timerfd = 0, ret;
test_init(argc, argv);
timerfd = timerfd_create(old.clockid, 0);
if (timerfd < 0) {
pr_perror("timerfd_create failed");
return -1;
}
show_timerfd("setup", &old);
if (timerfd_settime(timerfd, old.settime_flags, &old.v, NULL)) {
pr_perror("timerfd_settime failed");
return -1;
}
sleep(1);
test_daemon();
test_waitsig();
ret = check_timerfd(timerfd, &old);
if (ret)
fail();
else
pass();
return ret;
}
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