ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/tools/testing/selftests/pidfd/.gitignore b/marvell/linux/tools/testing/selftests/pidfd/.gitignore
new file mode 100644
index 0000000..8d06949
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/.gitignore
@@ -0,0 +1,4 @@
+pidfd_open_test
+pidfd_poll_test
+pidfd_test
+pidfd_wait
diff --git a/marvell/linux/tools/testing/selftests/pidfd/Makefile b/marvell/linux/tools/testing/selftests/pidfd/Makefile
new file mode 100644
index 0000000..7550f08
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+CFLAGS += -g -I../../../../usr/include/ -pthread
+
+TEST_GEN_PROGS := pidfd_test pidfd_open_test pidfd_poll_test pidfd_wait
+
+include ../lib.mk
+
diff --git a/marvell/linux/tools/testing/selftests/pidfd/pidfd.h b/marvell/linux/tools/testing/selftests/pidfd/pidfd.h
new file mode 100644
index 0000000..c6bc683
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/pidfd.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __PIDFD_H
+#define __PIDFD_H
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <sys/mount.h>
+
+#include "../kselftest.h"
+
+#ifndef P_PIDFD
+#define P_PIDFD 3
+#endif
+
+#ifndef CLONE_PIDFD
+#define CLONE_PIDFD 0x00001000
+#endif
+
+#ifndef __NR_pidfd_open
+#define __NR_pidfd_open -1
+#endif
+
+#ifndef __NR_pidfd_send_signal
+#define __NR_pidfd_send_signal -1
+#endif
+
+#ifndef __NR_clone3
+#define __NR_clone3 -1
+#endif
+
+/*
+ * The kernel reserves 300 pids via RESERVED_PIDS in kernel/pid.c
+ * That means, when it wraps around any pid < 300 will be skipped.
+ * So we need to use a pid > 300 in order to test recycling.
+ */
+#define PID_RECYCLE 1000
+
+/*
+ * Define a few custom error codes for the child process to clearly indicate
+ * what is happening. This way we can tell the difference between a system
+ * error, a test error, etc.
+ */
+#define PIDFD_PASS 0
+#define PIDFD_FAIL 1
+#define PIDFD_ERROR 2
+#define PIDFD_SKIP 3
+#define PIDFD_XFAIL 4
+
+int wait_for_pid(pid_t pid)
+{
+ int status, ret;
+
+again:
+ ret = waitpid(pid, &status, 0);
+ if (ret == -1) {
+ if (errno == EINTR)
+ goto again;
+
+ return -1;
+ }
+
+ if (!WIFEXITED(status))
+ return -1;
+
+ return WEXITSTATUS(status);
+}
+
+static inline int sys_pidfd_open(pid_t pid, unsigned int flags)
+{
+ return syscall(__NR_pidfd_open, pid, flags);
+}
+
+static inline int sys_pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
+ unsigned int flags)
+{
+ return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags);
+}
+
+#endif /* __PIDFD_H */
diff --git a/marvell/linux/tools/testing/selftests/pidfd/pidfd_open_test.c b/marvell/linux/tools/testing/selftests/pidfd/pidfd_open_test.c
new file mode 100644
index 0000000..8a59438
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <linux/types.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <sys/mount.h>
+#include <sys/prctl.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "pidfd.h"
+#include "../kselftest.h"
+
+static int safe_int(const char *numstr, int *converted)
+{
+ char *err = NULL;
+ long sli;
+
+ errno = 0;
+ sli = strtol(numstr, &err, 0);
+ if (errno == ERANGE && (sli == LONG_MAX || sli == LONG_MIN))
+ return -ERANGE;
+
+ if (errno != 0 && sli == 0)
+ return -EINVAL;
+
+ if (err == numstr || *err != '\0')
+ return -EINVAL;
+
+ if (sli > INT_MAX || sli < INT_MIN)
+ return -ERANGE;
+
+ *converted = (int)sli;
+ return 0;
+}
+
+static int char_left_gc(const char *buffer, size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++) {
+ if (buffer[i] == ' ' ||
+ buffer[i] == '\t')
+ continue;
+
+ return i;
+ }
+
+ return 0;
+}
+
+static int char_right_gc(const char *buffer, size_t len)
+{
+ int i;
+
+ for (i = len - 1; i >= 0; i--) {
+ if (buffer[i] == ' ' ||
+ buffer[i] == '\t' ||
+ buffer[i] == '\n' ||
+ buffer[i] == '\0')
+ continue;
+
+ return i + 1;
+ }
+
+ return 0;
+}
+
+static char *trim_whitespace_in_place(char *buffer)
+{
+ buffer += char_left_gc(buffer, strlen(buffer));
+ buffer[char_right_gc(buffer, strlen(buffer))] = '\0';
+ return buffer;
+}
+
+static pid_t get_pid_from_fdinfo_file(int pidfd, const char *key, size_t keylen)
+{
+ int ret;
+ char path[512];
+ FILE *f;
+ size_t n = 0;
+ pid_t result = -1;
+ char *line = NULL;
+
+ snprintf(path, sizeof(path), "/proc/self/fdinfo/%d", pidfd);
+
+ f = fopen(path, "re");
+ if (!f)
+ return -1;
+
+ while (getline(&line, &n, f) != -1) {
+ char *numstr;
+
+ if (strncmp(line, key, keylen))
+ continue;
+
+ numstr = trim_whitespace_in_place(line + 4);
+ ret = safe_int(numstr, &result);
+ if (ret < 0)
+ goto out;
+
+ break;
+ }
+
+out:
+ free(line);
+ fclose(f);
+ return result;
+}
+
+int main(int argc, char **argv)
+{
+ int pidfd = -1, ret = 1;
+ pid_t pid;
+
+ ksft_set_plan(3);
+
+ pidfd = sys_pidfd_open(-1, 0);
+ if (pidfd >= 0) {
+ ksft_print_msg(
+ "%s - succeeded to open pidfd for invalid pid -1\n",
+ strerror(errno));
+ goto on_error;
+ }
+ ksft_test_result_pass("do not allow invalid pid test: passed\n");
+
+ pidfd = sys_pidfd_open(getpid(), 1);
+ if (pidfd >= 0) {
+ ksft_print_msg(
+ "%s - succeeded to open pidfd with invalid flag value specified\n",
+ strerror(errno));
+ goto on_error;
+ }
+ ksft_test_result_pass("do not allow invalid flag test: passed\n");
+
+ pidfd = sys_pidfd_open(getpid(), 0);
+ if (pidfd < 0) {
+ ksft_print_msg("%s - failed to open pidfd\n", strerror(errno));
+ goto on_error;
+ }
+ ksft_test_result_pass("open a new pidfd test: passed\n");
+
+ pid = get_pid_from_fdinfo_file(pidfd, "Pid:", sizeof("Pid:") - 1);
+ ksft_print_msg("pidfd %d refers to process with pid %d\n", pidfd, pid);
+
+ ret = 0;
+
+on_error:
+ if (pidfd >= 0)
+ close(pidfd);
+
+ return !ret ? ksft_exit_pass() : ksft_exit_fail();
+}
diff --git a/marvell/linux/tools/testing/selftests/pidfd/pidfd_poll_test.c b/marvell/linux/tools/testing/selftests/pidfd/pidfd_poll_test.c
new file mode 100644
index 0000000..6108112
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <linux/types.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "pidfd.h"
+#include "../kselftest.h"
+
+static bool timeout;
+
+static void handle_alarm(int sig)
+{
+ timeout = true;
+}
+
+int main(int argc, char **argv)
+{
+ struct pollfd fds;
+ int iter, nevents;
+ int nr_iterations = 10000;
+
+ fds.events = POLLIN;
+
+ if (argc > 2)
+ ksft_exit_fail_msg("Unexpected command line argument\n");
+
+ if (argc == 2) {
+ nr_iterations = atoi(argv[1]);
+ if (nr_iterations <= 0)
+ ksft_exit_fail_msg("invalid input parameter %s\n",
+ argv[1]);
+ }
+
+ ksft_print_msg("running pidfd poll test for %d iterations\n",
+ nr_iterations);
+
+ for (iter = 0; iter < nr_iterations; iter++) {
+ int pidfd;
+ int child_pid = fork();
+
+ if (child_pid < 0) {
+ if (errno == EAGAIN) {
+ iter--;
+ continue;
+ }
+ ksft_exit_fail_msg(
+ "%s - failed to fork a child process\n",
+ strerror(errno));
+ }
+
+ if (child_pid == 0) {
+ /* Child process just sleeps for a min and exits */
+ sleep(60);
+ exit(EXIT_SUCCESS);
+ }
+
+ /* Parent kills the child and waits for its death */
+ pidfd = sys_pidfd_open(child_pid, 0);
+ if (pidfd < 0)
+ ksft_exit_fail_msg("%s - pidfd_open failed\n",
+ strerror(errno));
+
+ /* Setup 3 sec alarm - plenty of time */
+ if (signal(SIGALRM, handle_alarm) == SIG_ERR)
+ ksft_exit_fail_msg("%s - signal failed\n",
+ strerror(errno));
+ alarm(3);
+
+ /* Send SIGKILL to the child */
+ if (sys_pidfd_send_signal(pidfd, SIGKILL, NULL, 0))
+ ksft_exit_fail_msg("%s - pidfd_send_signal failed\n",
+ strerror(errno));
+
+ /* Wait for the death notification */
+ fds.fd = pidfd;
+ nevents = poll(&fds, 1, -1);
+
+ /* Check for error conditions */
+ if (nevents < 0)
+ ksft_exit_fail_msg("%s - poll failed\n",
+ strerror(errno));
+
+ if (nevents != 1)
+ ksft_exit_fail_msg("unexpected poll result: %d\n",
+ nevents);
+
+ if (!(fds.revents & POLLIN))
+ ksft_exit_fail_msg(
+ "unexpected event type received: 0x%x\n",
+ fds.revents);
+
+ if (timeout)
+ ksft_exit_fail_msg(
+ "death notification wait timeout\n");
+
+ close(pidfd);
+ /* Wait for child to prevent zombies */
+ if (waitpid(child_pid, NULL, 0) < 0)
+ ksft_exit_fail_msg("%s - waitpid failed\n",
+ strerror(errno));
+
+ }
+
+ ksft_test_result_pass("pidfd poll test: pass\n");
+ return ksft_exit_pass();
+}
diff --git a/marvell/linux/tools/testing/selftests/pidfd/pidfd_test.c b/marvell/linux/tools/testing/selftests/pidfd/pidfd_test.c
new file mode 100644
index 0000000..7aff2d3
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/pidfd_test.c
@@ -0,0 +1,536 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/types.h>
+#include <pthread.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <sys/epoll.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "pidfd.h"
+#include "../kselftest.h"
+
+#define str(s) _str(s)
+#define _str(s) #s
+#define CHILD_THREAD_MIN_WAIT 3 /* seconds */
+
+#define MAX_EVENTS 5
+
+static pid_t pidfd_clone(int flags, int *pidfd, int (*fn)(void *))
+{
+ size_t stack_size = 1024;
+ char *stack[1024] = { 0 };
+
+#ifdef __ia64__
+ return __clone2(fn, stack, stack_size, flags | SIGCHLD, NULL, pidfd);
+#else
+ return clone(fn, stack + stack_size, flags | SIGCHLD, NULL, pidfd);
+#endif
+}
+
+static int signal_received;
+
+static void set_signal_received_on_sigusr1(int sig)
+{
+ if (sig == SIGUSR1)
+ signal_received = 1;
+}
+
+/*
+ * Straightforward test to see whether pidfd_send_signal() works is to send
+ * a signal to ourself.
+ */
+static int test_pidfd_send_signal_simple_success(void)
+{
+ int pidfd, ret;
+ const char *test_name = "pidfd_send_signal send SIGUSR1";
+
+ pidfd = open("/proc/self", O_DIRECTORY | O_CLOEXEC);
+ if (pidfd < 0)
+ ksft_exit_fail_msg(
+ "%s test: Failed to open process file descriptor\n",
+ test_name);
+
+ signal(SIGUSR1, set_signal_received_on_sigusr1);
+
+ ret = sys_pidfd_send_signal(pidfd, SIGUSR1, NULL, 0);
+ close(pidfd);
+ if (ret < 0)
+ ksft_exit_fail_msg("%s test: Failed to send signal\n",
+ test_name);
+
+ if (signal_received != 1)
+ ksft_exit_fail_msg("%s test: Failed to receive signal\n",
+ test_name);
+
+ signal_received = 0;
+ ksft_test_result_pass("%s test: Sent signal\n", test_name);
+ return 0;
+}
+
+static int test_pidfd_send_signal_exited_fail(void)
+{
+ int pidfd, ret, saved_errno;
+ char buf[256];
+ pid_t pid;
+ const char *test_name = "pidfd_send_signal signal exited process";
+
+ pid = fork();
+ if (pid < 0)
+ ksft_exit_fail_msg("%s test: Failed to create new process\n",
+ test_name);
+
+ if (pid == 0)
+ _exit(EXIT_SUCCESS);
+
+ snprintf(buf, sizeof(buf), "/proc/%d", pid);
+
+ pidfd = open(buf, O_DIRECTORY | O_CLOEXEC);
+
+ (void)wait_for_pid(pid);
+
+ if (pidfd < 0)
+ ksft_exit_fail_msg(
+ "%s test: Failed to open process file descriptor\n",
+ test_name);
+
+ ret = sys_pidfd_send_signal(pidfd, 0, NULL, 0);
+ saved_errno = errno;
+ close(pidfd);
+ if (ret == 0)
+ ksft_exit_fail_msg(
+ "%s test: Managed to send signal to process even though it should have failed\n",
+ test_name);
+
+ if (saved_errno != ESRCH)
+ ksft_exit_fail_msg(
+ "%s test: Expected to receive ESRCH as errno value but received %d instead\n",
+ test_name, saved_errno);
+
+ ksft_test_result_pass("%s test: Failed to send signal as expected\n",
+ test_name);
+ return 0;
+}
+
+/*
+ * Maximum number of cycles we allow. This is equivalent to PID_MAX_DEFAULT.
+ * If users set a higher limit or we have cycled PIDFD_MAX_DEFAULT number of
+ * times then we skip the test to not go into an infinite loop or block for a
+ * long time.
+ */
+#define PIDFD_MAX_DEFAULT 0x8000
+
+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;
+}
+
+static int test_pidfd_send_signal_syscall_support(void)
+{
+ int pidfd, ret;
+ const char *test_name = "pidfd_send_signal check for support";
+
+ pidfd = open("/proc/self", O_DIRECTORY | O_CLOEXEC);
+ if (pidfd < 0)
+ ksft_exit_fail_msg(
+ "%s test: Failed to open process file descriptor\n",
+ test_name);
+
+ ret = sys_pidfd_send_signal(pidfd, 0, NULL, 0);
+ if (ret < 0) {
+ if (errno == ENOSYS)
+ ksft_exit_skip(
+ "%s test: pidfd_send_signal() syscall not supported\n",
+ test_name);
+
+ ksft_exit_fail_msg("%s test: Failed to send signal\n",
+ test_name);
+ }
+
+ close(pidfd);
+ ksft_test_result_pass(
+ "%s test: pidfd_send_signal() syscall is supported. Tests can be executed\n",
+ test_name);
+ return 0;
+}
+
+static void *test_pidfd_poll_exec_thread(void *priv)
+{
+ ksft_print_msg("Child Thread: starting. pid %d tid %d ; and sleeping\n",
+ getpid(), syscall(SYS_gettid));
+ ksft_print_msg("Child Thread: doing exec of sleep\n");
+
+ execl("/bin/sleep", "sleep", str(CHILD_THREAD_MIN_WAIT), (char *)NULL);
+
+ ksft_print_msg("Child Thread: DONE. pid %d tid %d\n",
+ getpid(), syscall(SYS_gettid));
+ return NULL;
+}
+
+static void poll_pidfd(const char *test_name, int pidfd)
+{
+ int c;
+ int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+ struct epoll_event event, events[MAX_EVENTS];
+
+ if (epoll_fd == -1)
+ ksft_exit_fail_msg("%s test: Failed to create epoll file descriptor "
+ "(errno %d)\n",
+ test_name, errno);
+
+ event.events = EPOLLIN;
+ event.data.fd = pidfd;
+
+ if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, pidfd, &event)) {
+ ksft_exit_fail_msg("%s test: Failed to add epoll file descriptor "
+ "(errno %d)\n",
+ test_name, errno);
+ }
+
+ c = epoll_wait(epoll_fd, events, MAX_EVENTS, 5000);
+ if (c != 1 || !(events[0].events & EPOLLIN))
+ ksft_exit_fail_msg("%s test: Unexpected epoll_wait result (c=%d, events=%x) ",
+ "(errno %d)\n",
+ test_name, c, events[0].events, errno);
+
+ close(epoll_fd);
+ return;
+
+}
+
+static int child_poll_exec_test(void *args)
+{
+ pthread_t t1;
+
+ ksft_print_msg("Child (pidfd): starting. pid %d tid %d\n", getpid(),
+ syscall(SYS_gettid));
+ pthread_create(&t1, NULL, test_pidfd_poll_exec_thread, NULL);
+ /*
+ * Exec in the non-leader thread will destroy the leader immediately.
+ * If the wait in the parent returns too soon, the test fails.
+ */
+ while (1)
+ sleep(1);
+}
+
+static void test_pidfd_poll_exec(int use_waitpid)
+{
+ int pid, pidfd = 0;
+ int status, ret;
+ pthread_t t1;
+ time_t prog_start = time(NULL);
+ const char *test_name = "pidfd_poll check for premature notification on child thread exec";
+
+ ksft_print_msg("Parent: pid: %d\n", getpid());
+ pid = pidfd_clone(CLONE_PIDFD, &pidfd, child_poll_exec_test);
+ if (pid < 0)
+ ksft_exit_fail_msg("%s test: pidfd_clone failed (ret %d, errno %d)\n",
+ test_name, pid, errno);
+
+ ksft_print_msg("Parent: Waiting for Child (%d) to complete.\n", pid);
+
+ if (use_waitpid) {
+ ret = waitpid(pid, &status, 0);
+ if (ret == -1)
+ ksft_print_msg("Parent: error\n");
+
+ if (ret == pid)
+ ksft_print_msg("Parent: Child process waited for.\n");
+ } else {
+ poll_pidfd(test_name, pidfd);
+ }
+
+ time_t prog_time = time(NULL) - prog_start;
+
+ ksft_print_msg("Time waited for child: %lu\n", prog_time);
+
+ close(pidfd);
+
+ if (prog_time < CHILD_THREAD_MIN_WAIT || prog_time > CHILD_THREAD_MIN_WAIT + 2)
+ ksft_exit_fail_msg("%s test: Failed\n", test_name);
+ else
+ ksft_test_result_pass("%s test: Passed\n", test_name);
+}
+
+static void *test_pidfd_poll_leader_exit_thread(void *priv)
+{
+ ksft_print_msg("Child Thread: starting. pid %d tid %d ; and sleeping\n",
+ getpid(), syscall(SYS_gettid));
+ sleep(CHILD_THREAD_MIN_WAIT);
+ ksft_print_msg("Child Thread: DONE. pid %d tid %d\n", getpid(), syscall(SYS_gettid));
+ return NULL;
+}
+
+static time_t *child_exit_secs;
+static int child_poll_leader_exit_test(void *args)
+{
+ pthread_t t1, t2;
+
+ ksft_print_msg("Child: starting. pid %d tid %d\n", getpid(), syscall(SYS_gettid));
+ pthread_create(&t1, NULL, test_pidfd_poll_leader_exit_thread, NULL);
+ pthread_create(&t2, NULL, test_pidfd_poll_leader_exit_thread, NULL);
+
+ /*
+ * glibc exit calls exit_group syscall, so explicity call exit only
+ * so that only the group leader exits, leaving the threads alone.
+ */
+ *child_exit_secs = time(NULL);
+ syscall(SYS_exit, 0);
+}
+
+static void test_pidfd_poll_leader_exit(int use_waitpid)
+{
+ int pid, pidfd = 0;
+ int status, ret;
+ time_t prog_start = time(NULL);
+ const char *test_name = "pidfd_poll check for premature notification on non-empty"
+ "group leader exit";
+
+ child_exit_secs = mmap(NULL, sizeof *child_exit_secs, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+ if (child_exit_secs == MAP_FAILED)
+ ksft_exit_fail_msg("%s test: mmap failed (errno %d)\n",
+ test_name, errno);
+
+ ksft_print_msg("Parent: pid: %d\n", getpid());
+ pid = pidfd_clone(CLONE_PIDFD, &pidfd, child_poll_leader_exit_test);
+ if (pid < 0)
+ ksft_exit_fail_msg("%s test: pidfd_clone failed (ret %d, errno %d)\n",
+ test_name, pid, errno);
+
+ ksft_print_msg("Parent: Waiting for Child (%d) to complete.\n", pid);
+
+ if (use_waitpid) {
+ ret = waitpid(pid, &status, 0);
+ if (ret == -1)
+ ksft_print_msg("Parent: error\n");
+ } else {
+ /*
+ * This sleep tests for the case where if the child exits, and is in
+ * EXIT_ZOMBIE, but the thread group leader is non-empty, then the poll
+ * doesn't prematurely return even though there are active threads
+ */
+ sleep(1);
+ poll_pidfd(test_name, pidfd);
+ }
+
+ if (ret == pid)
+ ksft_print_msg("Parent: Child process waited for.\n");
+
+ time_t since_child_exit = time(NULL) - *child_exit_secs;
+
+ ksft_print_msg("Time since child exit: %lu\n", since_child_exit);
+
+ close(pidfd);
+
+ if (since_child_exit < CHILD_THREAD_MIN_WAIT ||
+ since_child_exit > CHILD_THREAD_MIN_WAIT + 2)
+ ksft_exit_fail_msg("%s test: Failed\n", test_name);
+ else
+ ksft_test_result_pass("%s test: Passed\n", test_name);
+}
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+ ksft_set_plan(4);
+
+ test_pidfd_poll_exec(0);
+ test_pidfd_poll_exec(1);
+ test_pidfd_poll_leader_exit(0);
+ test_pidfd_poll_leader_exit(1);
+ test_pidfd_send_signal_syscall_support();
+ test_pidfd_send_signal_simple_success();
+ test_pidfd_send_signal_exited_fail();
+ test_pidfd_send_signal_recycled_pid_fail();
+
+ return ksft_exit_pass();
+}
diff --git a/marvell/linux/tools/testing/selftests/pidfd/pidfd_wait.c b/marvell/linux/tools/testing/selftests/pidfd/pidfd_wait.c
new file mode 100644
index 0000000..7079f8e
--- /dev/null
+++ b/marvell/linux/tools/testing/selftests/pidfd/pidfd_wait.c
@@ -0,0 +1,271 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "pidfd.h"
+#include "../kselftest.h"
+
+#define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr)))
+
+static pid_t sys_clone3(struct clone_args *args)
+{
+ return syscall(__NR_clone3, args, sizeof(struct clone_args));
+}
+
+static int sys_waitid(int which, pid_t pid, siginfo_t *info, int options,
+ struct rusage *ru)
+{
+ return syscall(__NR_waitid, which, pid, info, options, ru);
+}
+
+static int test_pidfd_wait_simple(void)
+{
+ const char *test_name = "pidfd wait simple";
+ int pidfd = -1, status = 0;
+ pid_t parent_tid = -1;
+ struct clone_args args = {
+ .parent_tid = ptr_to_u64(&parent_tid),
+ .pidfd = ptr_to_u64(&pidfd),
+ .flags = CLONE_PIDFD | CLONE_PARENT_SETTID,
+ .exit_signal = SIGCHLD,
+ };
+ int ret;
+ pid_t pid;
+ siginfo_t info = {
+ .si_signo = 0,
+ };
+
+ pidfd = open("/proc/self", O_DIRECTORY | O_RDONLY | O_CLOEXEC);
+ if (pidfd < 0)
+ ksft_exit_fail_msg("%s test: failed to open /proc/self %s\n",
+ test_name, strerror(errno));
+
+ pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
+ if (pid == 0)
+ ksft_exit_fail_msg(
+ "%s test: succeeded to wait on invalid pidfd %s\n",
+ test_name, strerror(errno));
+ close(pidfd);
+ pidfd = -1;
+
+ pidfd = open("/dev/null", O_RDONLY | O_CLOEXEC);
+ if (pidfd == 0)
+ ksft_exit_fail_msg("%s test: failed to open /dev/null %s\n",
+ test_name, strerror(errno));
+
+ pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
+ if (pid == 0)
+ ksft_exit_fail_msg(
+ "%s test: succeeded to wait on invalid pidfd %s\n",
+ test_name, strerror(errno));
+ close(pidfd);
+ pidfd = -1;
+
+ pid = sys_clone3(&args);
+ if (pid < 0)
+ ksft_exit_fail_msg("%s test: failed to create new process %s\n",
+ test_name, strerror(errno));
+
+ if (pid == 0)
+ exit(EXIT_SUCCESS);
+
+ pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
+ if (pid < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to wait on process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ if (!WIFEXITED(info.si_status) || WEXITSTATUS(info.si_status))
+ ksft_exit_fail_msg(
+ "%s test: unexpected status received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+ close(pidfd);
+
+ if (info.si_signo != SIGCHLD)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_signo, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_code != CLD_EXITED)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_code, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_pid != parent_tid)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_pid, parent_tid, pidfd,
+ strerror(errno));
+
+ ksft_test_result_pass("%s test: Passed\n", test_name);
+ return 0;
+}
+
+static int test_pidfd_wait_states(void)
+{
+ const char *test_name = "pidfd wait states";
+ int pidfd = -1, status = 0;
+ pid_t parent_tid = -1;
+ struct clone_args args = {
+ .parent_tid = ptr_to_u64(&parent_tid),
+ .pidfd = ptr_to_u64(&pidfd),
+ .flags = CLONE_PIDFD | CLONE_PARENT_SETTID,
+ .exit_signal = SIGCHLD,
+ };
+ int ret;
+ pid_t pid;
+ siginfo_t info = {
+ .si_signo = 0,
+ };
+
+ pid = sys_clone3(&args);
+ if (pid < 0)
+ ksft_exit_fail_msg("%s test: failed to create new process %s\n",
+ test_name, strerror(errno));
+
+ if (pid == 0) {
+ kill(getpid(), SIGSTOP);
+ kill(getpid(), SIGSTOP);
+ exit(EXIT_SUCCESS);
+ }
+
+ ret = sys_waitid(P_PIDFD, pidfd, &info, WSTOPPED, NULL);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to wait on WSTOPPED process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ if (info.si_signo != SIGCHLD)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_signo, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_code != CLD_STOPPED)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_code, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_pid != parent_tid)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_pid, parent_tid, pidfd,
+ strerror(errno));
+
+ ret = sys_pidfd_send_signal(pidfd, SIGCONT, NULL, 0);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to send signal to process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ ret = sys_waitid(P_PIDFD, pidfd, &info, WCONTINUED, NULL);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to wait WCONTINUED on process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ if (info.si_signo != SIGCHLD)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_signo, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_code != CLD_CONTINUED)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_code, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_pid != parent_tid)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_pid, parent_tid, pidfd,
+ strerror(errno));
+
+ ret = sys_waitid(P_PIDFD, pidfd, &info, WUNTRACED, NULL);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to wait on WUNTRACED process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ if (info.si_signo != SIGCHLD)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_signo, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_code != CLD_STOPPED)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_code, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_pid != parent_tid)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_pid, parent_tid, pidfd,
+ strerror(errno));
+
+ ret = sys_pidfd_send_signal(pidfd, SIGKILL, NULL, 0);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to send SIGKILL to process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ ret = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
+ if (ret < 0)
+ ksft_exit_fail_msg(
+ "%s test: failed to wait on WEXITED process with pid %d and pidfd %d: %s\n",
+ test_name, parent_tid, pidfd, strerror(errno));
+
+ if (info.si_signo != SIGCHLD)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_signo, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_code != CLD_KILLED)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_code, parent_tid, pidfd,
+ strerror(errno));
+
+ if (info.si_pid != parent_tid)
+ ksft_exit_fail_msg(
+ "%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
+ test_name, info.si_pid, parent_tid, pidfd,
+ strerror(errno));
+
+ close(pidfd);
+
+ ksft_test_result_pass("%s test: Passed\n", test_name);
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+ ksft_set_plan(2);
+
+ test_pidfd_wait_simple();
+ test_pidfd_wait_states();
+
+ return ksft_exit_pass();
+}