forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
189 lines
4.2 KiB
189 lines
4.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
#define _GNU_SOURCE |
|
#include <errno.h> |
|
#include <fcntl.h> |
|
#include <sched.h> |
|
#include <stdio.h> |
|
#include <stdbool.h> |
|
#include <sys/stat.h> |
|
#include <sys/syscall.h> |
|
#include <sys/types.h> |
|
#include <time.h> |
|
#include <unistd.h> |
|
#include <string.h> |
|
|
|
#include "log.h" |
|
#include "timens.h" |
|
|
|
/* |
|
* Test shouldn't be run for a day, so add 10 days to child |
|
* time and check parent's time to be in the same day. |
|
*/ |
|
#define DAY_IN_SEC (60*60*24) |
|
#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC) |
|
|
|
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
|
|
|
struct test_clock { |
|
clockid_t id; |
|
char *name; |
|
/* |
|
* off_id is -1 if a clock has own offset, or it contains an index |
|
* which contains a right offset of this clock. |
|
*/ |
|
int off_id; |
|
time_t offset; |
|
}; |
|
|
|
#define ct(clock, off_id) { clock, #clock, off_id } |
|
static struct test_clock clocks[] = { |
|
ct(CLOCK_BOOTTIME, -1), |
|
ct(CLOCK_BOOTTIME_ALARM, 1), |
|
ct(CLOCK_MONOTONIC, -1), |
|
ct(CLOCK_MONOTONIC_COARSE, 1), |
|
ct(CLOCK_MONOTONIC_RAW, 1), |
|
}; |
|
#undef ct |
|
|
|
static int child_ns, parent_ns = -1; |
|
|
|
static int switch_ns(int fd) |
|
{ |
|
if (setns(fd, CLONE_NEWTIME)) { |
|
pr_perror("setns()"); |
|
return -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int init_namespaces(void) |
|
{ |
|
char path[] = "/proc/self/ns/time_for_children"; |
|
struct stat st1, st2; |
|
|
|
if (parent_ns == -1) { |
|
parent_ns = open(path, O_RDONLY); |
|
if (parent_ns <= 0) |
|
return pr_perror("Unable to open %s", path); |
|
} |
|
|
|
if (fstat(parent_ns, &st1)) |
|
return pr_perror("Unable to stat the parent timens"); |
|
|
|
if (unshare_timens()) |
|
return -1; |
|
|
|
child_ns = open(path, O_RDONLY); |
|
if (child_ns <= 0) |
|
return pr_perror("Unable to open %s", path); |
|
|
|
if (fstat(child_ns, &st2)) |
|
return pr_perror("Unable to stat the timens"); |
|
|
|
if (st1.st_ino == st2.st_ino) |
|
return pr_perror("The same child_ns after CLONE_NEWTIME"); |
|
|
|
return 0; |
|
} |
|
|
|
static int test_gettime(clockid_t clock_index, bool raw_syscall, time_t offset) |
|
{ |
|
struct timespec child_ts_new, parent_ts_old, cur_ts; |
|
char *entry = raw_syscall ? "syscall" : "vdso"; |
|
double precision = 0.0; |
|
|
|
if (check_skip(clocks[clock_index].id)) |
|
return 0; |
|
|
|
switch (clocks[clock_index].id) { |
|
case CLOCK_MONOTONIC_COARSE: |
|
case CLOCK_MONOTONIC_RAW: |
|
precision = -2.0; |
|
break; |
|
} |
|
|
|
if (switch_ns(parent_ns)) |
|
return pr_err("switch_ns(%d)", child_ns); |
|
|
|
if (_gettime(clocks[clock_index].id, &parent_ts_old, raw_syscall)) |
|
return -1; |
|
|
|
child_ts_new.tv_nsec = parent_ts_old.tv_nsec; |
|
child_ts_new.tv_sec = parent_ts_old.tv_sec + offset; |
|
|
|
if (switch_ns(child_ns)) |
|
return pr_err("switch_ns(%d)", child_ns); |
|
|
|
if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall)) |
|
return -1; |
|
|
|
if (difftime(cur_ts.tv_sec, child_ts_new.tv_sec) < precision) { |
|
ksft_test_result_fail( |
|
"Child's %s (%s) time has not changed: %lu -> %lu [%lu]\n", |
|
clocks[clock_index].name, entry, parent_ts_old.tv_sec, |
|
child_ts_new.tv_sec, cur_ts.tv_sec); |
|
return -1; |
|
} |
|
|
|
if (switch_ns(parent_ns)) |
|
return pr_err("switch_ns(%d)", parent_ns); |
|
|
|
if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall)) |
|
return -1; |
|
|
|
if (difftime(cur_ts.tv_sec, parent_ts_old.tv_sec) > DAY_IN_SEC) { |
|
ksft_test_result_fail( |
|
"Parent's %s (%s) time has changed: %lu -> %lu [%lu]\n", |
|
clocks[clock_index].name, entry, parent_ts_old.tv_sec, |
|
child_ts_new.tv_sec, cur_ts.tv_sec); |
|
/* Let's play nice and put it closer to original */ |
|
clock_settime(clocks[clock_index].id, &cur_ts); |
|
return -1; |
|
} |
|
|
|
ksft_test_result_pass("Passed for %s (%s)\n", |
|
clocks[clock_index].name, entry); |
|
return 0; |
|
} |
|
|
|
int main(int argc, char *argv[]) |
|
{ |
|
unsigned int i; |
|
time_t offset; |
|
int ret = 0; |
|
|
|
nscheck(); |
|
|
|
check_supported_timers(); |
|
|
|
ksft_set_plan(ARRAY_SIZE(clocks) * 2); |
|
|
|
if (init_namespaces()) |
|
return 1; |
|
|
|
/* Offsets have to be set before tasks enter the namespace. */ |
|
for (i = 0; i < ARRAY_SIZE(clocks); i++) { |
|
if (clocks[i].off_id != -1) |
|
continue; |
|
offset = TEN_DAYS_IN_SEC + i * 1000; |
|
clocks[i].offset = offset; |
|
if (_settime(clocks[i].id, offset)) |
|
return 1; |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(clocks); i++) { |
|
if (clocks[i].off_id != -1) |
|
offset = clocks[clocks[i].off_id].offset; |
|
else |
|
offset = clocks[i].offset; |
|
ret |= test_gettime(i, true, offset); |
|
ret |= test_gettime(i, false, offset); |
|
} |
|
|
|
if (ret) |
|
ksft_exit_fail(); |
|
|
|
ksft_exit_pass(); |
|
return !!ret; |
|
}
|
|
|