void child(int cpu)
{
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
if (sched_setaffinity(0, sizeof(set), &set) != 0) {
ksft_print_msg("sched_setaffinity() failed: %s\n",
strerror(errno));
_exit(1);
}
if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) {
ksft_print_msg("ptrace(PTRACE_TRACEME) failed: %s\n",
strerror(errno));
_exit(1);
}
if (raise(SIGSTOP) != 0) {
ksft_print_msg("raise(SIGSTOP) failed: %s\n", strerror(errno));
_exit(1);
}
_exit(0);
}
int main(int argc, char *argv[])
{
int c, ret;
while ((c = getopt(argc, argv, "bchlot:v:")) != -1) {
switch (c) {
case 'b':
broadcast = 1;
break;
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'l':
locked = 1;
break;
case 'o':
owner = 1;
locked = 0;
break;
case 't':
timeout_ns = atoi(optarg);
break;
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_print_msg("%s: Test requeue functionality\n", basename(argv[0]));
ksft_print_msg(
"\tArguments: broadcast=%d locked=%d owner=%d timeout=%ldns\n",
broadcast, locked, owner, timeout_ns);
/*
* FIXME: unit_test is obsolete now that we parse options and the
* various style of runs are done by run.sh - simplify the code and move
* unit_test into main()
*/
ret = unit_test(broadcast, locked, owner, timeout_ns);
print_result(TEST_NAME, ret);
return ret;
}
int main(int argc, char **argv)
{
const char *atsec = "";
/*
* Be careful just in case a setgid or setcapped copy of this
* helper gets out.
*/
if (argc != 5)
ksft_exit_fail_msg("wrong argc\n");
#ifdef HAVE_GETAUXVAL
if (getauxval(AT_SECURE))
atsec = " (AT_SECURE is set)";
else
atsec = " (AT_SECURE is not set)";
#endif
capng_get_caps_process();
if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
ksft_print_msg("Wrong effective state%s\n", atsec);
return 1;
}
if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
ksft_print_msg("Wrong permitted state%s\n", atsec);
return 1;
}
if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
ksft_print_msg("Wrong inheritable state%s\n", atsec);
return 1;
}
if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
ksft_print_msg("Wrong ambient state%s\n", atsec);
return 1;
}
ksft_print_msg("%s: Capabilities after execve were correct\n",
"validate_cap:");
return 0;
}
int main(int argc, char **argv)
{
pthread_t thr;
int ret = RET_PASS;
int res;
int c;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg(
"%s: Test the futex value of private file mappings in FUTEX_WAIT\n",
basename(argv[0]));
ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);
if (ret < 0) {
fprintf(stderr, "pthread_create error\n");
ret = RET_ERROR;
goto out;
}
info("wait a while\n");
usleep(WAKE_WAIT_US);
val = 2;
res = futex_wake(&val, 1, 0);
info("futex_wake %d\n", res);
if (res != 1) {
fail("FUTEX_WAKE didn't find the waiting thread.\n");
ret = RET_FAIL;
}
info("join\n");
pthread_join(thr, NULL);
out:
print_result(TEST_NAME, ret);
return ret;
}
int main(int argc, char *argv[])
{
unsigned int old_val;
struct sigaction sa;
pthread_t waiter;
int c, res, ret = RET_PASS;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Test signal handling during requeue_pi\n",
basename(argv[0]));
ksft_print_msg("\tArguments: <none>\n");
sa.sa_handler = handle_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGUSR1, &sa, NULL)) {
error("sigaction\n", errno);
exit(1);
}
info("m1:f2: %x\n", f2);
info("Creating waiter\n");
res = create_rt_thread(&waiter, waiterfn, NULL, SCHED_FIFO, 1);
if (res) {
error("Creating waiting thread failed", res);
ret = RET_ERROR;
goto out;
}
info("Calling FUTEX_LOCK_PI on f2=%x @ %p\n", f2, &f2);
info("m2:f2: %x\n", f2);
futex_lock_pi(&f2, 0, 0, FUTEX_PRIVATE_FLAG);
info("m3:f2: %x\n", f2);
while (1) {
/*
* signal the waiter before requeue, waiter should automatically
* restart futex_wait_requeue_pi() in the kernel. Wait for the
* waiter to block on f1 again.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
usleep(DELAY_US);
info("Requeueing waiter via FUTEX_CMP_REQUEUE_PI\n");
old_val = f1;
res = futex_cmp_requeue_pi(&f1, old_val, &(f2), 1, 0,
FUTEX_PRIVATE_FLAG);
/*
* If res is non-zero, we either requeued the waiter or hit an
* error, break out and handle it. If it is zero, then the
* signal may have hit before the the waiter was blocked on f1.
* Try again.
*/
if (res > 0) {
atomic_set(&requeued, 1);
break;
} else if (res < 0) {
error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
ret = RET_ERROR;
break;
}
}
info("m4:f2: %x\n", f2);
/*
* Signal the waiter after requeue, waiter should return from
* futex_wait_requeue_pi() with EWOULDBLOCK. Join the thread here so the
* futex_unlock_pi() can't happen before the signal wakeup is detected
* in the kernel.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
info("Waiting for waiter to return\n");
pthread_join(waiter, NULL);
info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n", f2, &f2);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
info("m5:f2: %x\n", f2);
out:
if (ret == RET_PASS && waiter_ret)
ret = waiter_ret;
print_result(TEST_NAME, ret);
return ret;
}
static int test_pidfd_send_signal_recycled_pid_fail(void)
{
int i, ret;
pid_t pid1;
const char *test_name = "pidfd_send_signal signal recycled pid";
ret = unshare(CLONE_NEWPID);
if (ret < 0)
ksft_exit_fail_msg("%s test: Failed to unshare pid namespace\n",
test_name);
ret = unshare(CLONE_NEWNS);
if (ret < 0)
ksft_exit_fail_msg(
"%s test: Failed to unshare mount namespace\n",
test_name);
ret = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
if (ret < 0)
ksft_exit_fail_msg("%s test: Failed to remount / private\n",
test_name);
/* pid 1 in new pid namespace */
pid1 = fork();
if (pid1 < 0)
ksft_exit_fail_msg("%s test: Failed to create new process\n",
test_name);
if (pid1 == 0) {
char buf[256];
pid_t pid2;
int pidfd = -1;
(void)umount2("/proc", MNT_DETACH);
ret = mount("proc", "/proc", "proc", 0, NULL);
if (ret < 0)
_exit(PIDFD_ERROR);
/* grab pid PID_RECYCLE */
for (i = 0; i <= PIDFD_MAX_DEFAULT; i++) {
pid2 = fork();
if (pid2 < 0)
_exit(PIDFD_ERROR);
if (pid2 == 0)
_exit(PIDFD_PASS);
if (pid2 == PID_RECYCLE) {
snprintf(buf, sizeof(buf), "/proc/%d", pid2);
ksft_print_msg("pid to recycle is %d\n", pid2);
pidfd = open(buf, O_DIRECTORY | O_CLOEXEC);
}
if (wait_for_pid(pid2))
_exit(PIDFD_ERROR);
if (pid2 >= PID_RECYCLE)
break;
}
/*
* We want to be as predictable as we can so if we haven't been
* able to grab pid PID_RECYCLE skip the test.
*/
if (pid2 != PID_RECYCLE) {
/* skip test */
close(pidfd);
_exit(PIDFD_SKIP);
}
if (pidfd < 0)
_exit(PIDFD_ERROR);
for (i = 0; i <= PIDFD_MAX_DEFAULT; i++) {
char c;
int pipe_fds[2];
pid_t recycled_pid;
int child_ret = PIDFD_PASS;
ret = pipe2(pipe_fds, O_CLOEXEC);
if (ret < 0)
_exit(PIDFD_ERROR);
recycled_pid = fork();
if (recycled_pid < 0)
_exit(PIDFD_ERROR);
if (recycled_pid == 0) {
close(pipe_fds[1]);
(void)read(pipe_fds[0], &c, 1);
close(pipe_fds[0]);
_exit(PIDFD_PASS);
}
/*
* Stop the child so we can inspect whether we have
* recycled pid PID_RECYCLE.
*/
close(pipe_fds[0]);
ret = kill(recycled_pid, SIGSTOP);
close(pipe_fds[1]);
if (ret) {
(void)wait_for_pid(recycled_pid);
_exit(PIDFD_ERROR);
}
/*
* We have recycled the pid. Try to signal it. This
* needs to fail since this is a different process than
* the one the pidfd refers to.
*/
if (recycled_pid == PID_RECYCLE) {
ret = sys_pidfd_send_signal(pidfd, SIGCONT,
NULL, 0);
if (ret && errno == ESRCH)
child_ret = PIDFD_XFAIL;
else
child_ret = PIDFD_FAIL;
}
/* let the process move on */
ret = kill(recycled_pid, SIGCONT);
if (ret)
(void)kill(recycled_pid, SIGKILL);
if (wait_for_pid(recycled_pid))
_exit(PIDFD_ERROR);
switch (child_ret) {
case PIDFD_FAIL:
/* fallthrough */
case PIDFD_XFAIL:
_exit(child_ret);
case PIDFD_PASS:
break;
default:
/* not reached */
_exit(PIDFD_ERROR);
}
/*
* If the user set a custom pid_max limit we could be
* in the millions.
* Skip the test in this case.
*/
if (recycled_pid > PIDFD_MAX_DEFAULT)
_exit(PIDFD_SKIP);
}
/* failed to recycle pid */
_exit(PIDFD_SKIP);
}
ret = wait_for_pid(pid1);
switch (ret) {
case PIDFD_FAIL:
ksft_exit_fail_msg(
"%s test: Managed to signal recycled pid %d\n",
test_name, PID_RECYCLE);
case PIDFD_PASS:
ksft_exit_fail_msg("%s test: Failed to recycle pid %d\n",
test_name, PID_RECYCLE);
case PIDFD_SKIP:
ksft_print_msg("%s test: Skipping test\n", test_name);
ret = 0;
break;
case PIDFD_XFAIL:
ksft_test_result_pass(
"%s test: Failed to signal recycled pid as expected\n",
test_name);
ret = 0;
break;
default /* PIDFD_ERROR */:
ksft_exit_fail_msg("%s test: Error while running tests\n",
test_name);
}
return ret;
}
bool run_test(int cpu)
{
int status;
pid_t pid = fork();
pid_t wpid;
if (pid < 0) {
ksft_print_msg("fork() failed: %s\n", strerror(errno));
return false;
}
if (pid == 0)
child(cpu);
wpid = waitpid(pid, &status, __WALL);
if (wpid != pid) {
ksft_print_msg("waitpid() failed: %s\n", strerror(errno));
return false;
}
if (!WIFSTOPPED(status)) {
ksft_print_msg("child did not stop: %s\n", strerror(errno));
return false;
}
if (WSTOPSIG(status) != SIGSTOP) {
ksft_print_msg("child did not stop with SIGSTOP: %s\n",
strerror(errno));
return false;
}
if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) {
if (errno == EIO) {
ksft_exit_skip(
"ptrace(PTRACE_SINGLESTEP) not supported on this architecture: %s\n",
strerror(errno));
}
ksft_print_msg("ptrace(PTRACE_SINGLESTEP) failed: %s\n",
strerror(errno));
return false;
}
wpid = waitpid(pid, &status, __WALL);
if (wpid != pid) {
ksft_print_msg("waitpid() failed: $s\n", strerror(errno));
return false;
}
if (WIFEXITED(status)) {
ksft_print_msg("child did not single-step: %s\n",
strerror(errno));
return false;
}
if (!WIFSTOPPED(status)) {
ksft_print_msg("child did not stop: %s\n", strerror(errno));
return false;
}
if (WSTOPSIG(status) != SIGTRAP) {
ksft_print_msg("child did not stop with SIGTRAP: %s\n",
strerror(errno));
return false;
}
if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) {
ksft_print_msg("ptrace(PTRACE_CONT) failed: %s\n",
strerror(errno));
return false;
}
wpid = waitpid(pid, &status, __WALL);
if (wpid != pid) {
ksft_print_msg("waitpid() failed: %s\n", strerror(errno));
return false;
}
if (!WIFEXITED(status)) {
ksft_print_msg("child did not exit after PTRACE_CONT: %s\n",
strerror(errno));
return false;
}
return true;
}