[PATCH v2 4/6] selftests: pidfd: do not use ksft_exit_skip after ksft_set_plan

[Paolo Bonzini]

Calling ksft_exit_skip after ksft_set_plan results in executing fewer tests
than planned.  Use ksft_test_result_skip instead.

The plan passed to ksft_set_plan was wrong, too, so fix it while at it.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 tools/testing/selftests/pidfd/pidfd_test.c | 39 ++++++++++++++++++----
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/pidfd/pidfd_test.c 
b/tools/testing/selftests/pidfd/pidfd_test.c
index 7aff2d3b42c0..380c6314e6a2 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -8,6 +8,7 @@
 #include <sched.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <syscall.h>
@@ -27,6 +28,8 @@
 
 #define MAX_EVENTS 5
 
+static bool have_pidfd_send_signal = false;
+
 static pid_t pidfd_clone(int flags, int *pidfd, int (*fn)(void *))
 {
        size_t stack_size = 1024;
@@ -56,6 +59,13 @@ static int test_pidfd_send_signal_simple_success(void)
        int pidfd, ret;
        const char *test_name = "pidfd_send_signal send SIGUSR1";
 
+       if (!have_pidfd_send_signal) {
+               ksft_test_result_skip(
+                       "%s test: pidfd_send_signal() syscall not supported\n",
+                       test_name);
+               return 0;
+       }
+
        pidfd = open("/proc/self", O_DIRECTORY | O_CLOEXEC);
        if (pidfd < 0)
                ksft_exit_fail_msg(
@@ -86,6 +96,13 @@ static int test_pidfd_send_signal_exited_fail(void)
        pid_t pid;
        const char *test_name = "pidfd_send_signal signal exited process";
 
+       if (!have_pidfd_send_signal) {
+               ksft_test_result_skip(
+                       "%s test: pidfd_send_signal() syscall not supported\n",
+                       test_name);
+               return 0;
+       }
+
        pid = fork();
        if (pid < 0)
                ksft_exit_fail_msg("%s test: Failed to create new process\n",
@@ -137,6 +154,13 @@ static int test_pidfd_send_signal_recycled_pid_fail(void)
        pid_t pid1;
        const char *test_name = "pidfd_send_signal signal recycled pid";
 
+       if (!have_pidfd_send_signal) {
+               ksft_test_result_skip(
+                       "%s test: pidfd_send_signal() syscall not supported\n",
+                       test_name);
+               return 0;
+       }
+
        ret = unshare(CLONE_NEWPID);
        if (ret < 0)
                ksft_exit_fail_msg("%s test: Failed to unshare pid namespace\n",
@@ -325,13 +349,16 @@ static int test_pidfd_send_signal_syscall_support(void)
 
        ret = sys_pidfd_send_signal(pidfd, 0, NULL, 0);
        if (ret < 0) {
-               if (errno == ENOSYS)
-                       ksft_exit_skip(
+               if (errno == ENOSYS) {
+                       ksft_test_result_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);
+               } else {
+                       ksft_exit_fail_msg("%s test: Failed to send signal\n",
+                                          test_name);
+               }
+       } else {
+               have_pidfd_send_signal = true;
        }
 
        close(pidfd);
@@ -521,7 +548,7 @@ static void test_pidfd_poll_leader_exit(int use_waitpid)
 int main(int argc, char **argv)
 {
        ksft_print_header();
-       ksft_set_plan(4);
+       ksft_set_plan(8);
 
        test_pidfd_poll_exec(0);
        test_pidfd_poll_exec(1);
-- 
2.26.2