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![Shuah Khan](/assets/img/avatar_default.png)
ARRAY_SIZE is defined in several selftests. Remove definitions from individual test files and include header file for the define instead. ARRAY_SIZE define is added in a separate patch to prepare for this change. Remove ARRAY_SIZE from timens tests and pickup the one defined in kselftest.h. Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
197 lines
3.9 KiB
C
197 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <math.h>
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#include <sched.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include "log.h"
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#include "timens.h"
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/*
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* Test shouldn't be run for a day, so add 10 days to child
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* time and check parent's time to be in the same day.
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*/
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#define MAX_TEST_TIME_SEC (60*5)
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#define DAY_IN_SEC (60*60*24)
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#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
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static int child_ns, parent_ns;
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static int switch_ns(int fd)
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{
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if (setns(fd, CLONE_NEWTIME))
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return pr_perror("setns()");
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return 0;
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}
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static int init_namespaces(void)
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{
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char path[] = "/proc/self/ns/time_for_children";
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struct stat st1, st2;
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parent_ns = open(path, O_RDONLY);
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if (parent_ns <= 0)
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return pr_perror("Unable to open %s", path);
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if (fstat(parent_ns, &st1))
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return pr_perror("Unable to stat the parent timens");
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if (unshare_timens())
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return -1;
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child_ns = open(path, O_RDONLY);
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if (child_ns <= 0)
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return pr_perror("Unable to open %s", path);
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if (fstat(child_ns, &st2))
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return pr_perror("Unable to stat the timens");
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if (st1.st_ino == st2.st_ino)
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return pr_err("The same child_ns after CLONE_NEWTIME");
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if (_settime(CLOCK_BOOTTIME, TEN_DAYS_IN_SEC))
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return -1;
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return 0;
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}
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static int read_proc_uptime(struct timespec *uptime)
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{
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unsigned long up_sec, up_nsec;
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FILE *proc;
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proc = fopen("/proc/uptime", "r");
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if (proc == NULL) {
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pr_perror("Unable to open /proc/uptime");
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return -1;
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}
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if (fscanf(proc, "%lu.%02lu", &up_sec, &up_nsec) != 2) {
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if (errno) {
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pr_perror("fscanf");
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return -errno;
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}
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pr_err("failed to parse /proc/uptime");
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return -1;
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}
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fclose(proc);
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uptime->tv_sec = up_sec;
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uptime->tv_nsec = up_nsec;
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return 0;
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}
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static int read_proc_stat_btime(unsigned long long *boottime_sec)
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{
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FILE *proc;
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char line_buf[2048];
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proc = fopen("/proc/stat", "r");
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if (proc == NULL) {
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pr_perror("Unable to open /proc/stat");
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return -1;
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}
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while (fgets(line_buf, 2048, proc)) {
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if (sscanf(line_buf, "btime %llu", boottime_sec) != 1)
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continue;
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fclose(proc);
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return 0;
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}
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if (errno) {
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pr_perror("fscanf");
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fclose(proc);
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return -errno;
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}
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pr_err("failed to parse /proc/stat");
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fclose(proc);
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return -1;
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}
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static int check_uptime(void)
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{
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struct timespec uptime_new, uptime_old;
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time_t uptime_expected;
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double prec = MAX_TEST_TIME_SEC;
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if (switch_ns(parent_ns))
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return pr_err("switch_ns(%d)", parent_ns);
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if (read_proc_uptime(&uptime_old))
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return 1;
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if (switch_ns(child_ns))
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return pr_err("switch_ns(%d)", child_ns);
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if (read_proc_uptime(&uptime_new))
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return 1;
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uptime_expected = uptime_old.tv_sec + TEN_DAYS_IN_SEC;
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if (fabs(difftime(uptime_new.tv_sec, uptime_expected)) > prec) {
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pr_fail("uptime in /proc/uptime: old %ld, new %ld [%ld]",
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uptime_old.tv_sec, uptime_new.tv_sec,
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uptime_old.tv_sec + TEN_DAYS_IN_SEC);
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return 1;
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}
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ksft_test_result_pass("Passed for /proc/uptime\n");
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return 0;
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}
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static int check_stat_btime(void)
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{
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unsigned long long btime_new, btime_old;
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unsigned long long btime_expected;
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if (switch_ns(parent_ns))
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return pr_err("switch_ns(%d)", parent_ns);
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if (read_proc_stat_btime(&btime_old))
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return 1;
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if (switch_ns(child_ns))
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return pr_err("switch_ns(%d)", child_ns);
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if (read_proc_stat_btime(&btime_new))
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return 1;
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btime_expected = btime_old - TEN_DAYS_IN_SEC;
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if (btime_new != btime_expected) {
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pr_fail("btime in /proc/stat: old %llu, new %llu [%llu]",
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btime_old, btime_new, btime_expected);
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return 1;
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}
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ksft_test_result_pass("Passed for /proc/stat btime\n");
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int ret = 0;
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nscheck();
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ksft_set_plan(2);
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if (init_namespaces())
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return 1;
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ret |= check_uptime();
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ret |= check_stat_btime();
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if (ret)
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ksft_exit_fail();
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ksft_exit_pass();
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return ret;
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}
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