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Commita4fd841

Browse files
avaginKAGA-KOKO
authored andcommitted
selftests/timens: Add a test for futex()
Output on success: 1..2 ok 1 futex with the 0 clockid ok 2 futex with the 1 clockid # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0Signed-off-by: Andrei Vagin <avagin@gmail.com>Signed-off-by: Thomas Gleixner <tglx@linutronix.de>Link:https://lore.kernel.org/r/20201015160020.293748-2-avagin@gmail.com
1 parentc2f7d08 commita4fd841

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2 files changed

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2 files changed

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‎tools/testing/selftests/timens/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
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TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec
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TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec futex
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TEST_GEN_PROGS_EXTENDED := gettime_perf
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CFLAGS := -Wall -Werror -pthread
Lines changed: 110 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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// SPDX-License-Identifier: GPL-2.0
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#define_GNU_SOURCE
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#include<sched.h>
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#include<linux/unistd.h>
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#include<linux/futex.h>
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#include<stdio.h>
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#include<string.h>
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#include<sys/syscall.h>
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#include<sys/types.h>
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#include<sys/wait.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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#defineNSEC_PER_SEC 1000000000ULL
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staticintrun_test(intclockid)
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{
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intfutex_op=FUTEX_WAIT_BITSET;
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structtimespectimeout,end;
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intval=0;
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if (clockid==CLOCK_REALTIME)
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futex_op |=FUTEX_CLOCK_REALTIME;
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clock_gettime(clockid,&timeout);
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timeout.tv_nsec+=NSEC_PER_SEC /10;// 100ms
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if (timeout.tv_nsec>NSEC_PER_SEC) {
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timeout.tv_sec++;
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timeout.tv_nsec-=NSEC_PER_SEC;
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}
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if (syscall(__NR_futex,&val,futex_op,0,
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&timeout,0,FUTEX_BITSET_MATCH_ANY) >=0) {
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ksft_test_result_fail("futex didn't return ETIMEDOUT\n");
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return1;
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}
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if (errno!=ETIMEDOUT) {
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ksft_test_result_fail("futex didn't return ETIMEDOUT: %s\n",
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strerror(errno));
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return1;
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}
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clock_gettime(clockid,&end);
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if (end.tv_sec<timeout.tv_sec||
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(end.tv_sec==timeout.tv_sec&&end.tv_nsec<timeout.tv_nsec)) {
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ksft_test_result_fail("futex slept less than 100ms\n");
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return1;
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}
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ksft_test_result_pass("futex with the %d clockid\n",clockid);
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return0;
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}
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intmain(intargc,char*argv[])
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{
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intstatus,len,fd;
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charbuf[4096];
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pid_tpid;
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structtimespecmtime_now;
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nscheck();
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ksft_set_plan(2);
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clock_gettime(CLOCK_MONOTONIC,&mtime_now);
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if (unshare_timens())
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return1;
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len=snprintf(buf,sizeof(buf),"%d %d 0",
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CLOCK_MONOTONIC,70*24*3600);
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fd=open("/proc/self/timens_offsets",O_WRONLY);
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if (fd<0)
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returnpr_perror("/proc/self/timens_offsets");
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if (write(fd,buf,len)!=len)
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returnpr_perror("/proc/self/timens_offsets");
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close(fd);
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pid=fork();
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if (pid<0)
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returnpr_perror("Unable to fork");
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if (pid==0) {
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intret=0;
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ret |=run_test(CLOCK_REALTIME);
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ret |=run_test(CLOCK_MONOTONIC);
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if (ret)
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ksft_exit_fail();
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ksft_exit_pass();
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return0;
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}
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if (waitpid(pid,&status,0)!=pid)
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returnpr_perror("Unable to wait the child process");
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if (WIFEXITED(status))
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returnWEXITSTATUS(status);
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return1;
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}

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