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https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/
synced 2026-04-18 06:33:43 -04:00
266679ffd8
Now that kselftest.h can be used with nolibc convert the za-fork test to
use it. We do still have to open code ksft_print_msg() but that's not the
end of the world. Some of the advantage comes from using printf() which we
could have been using already.
This does change the output when tests are skipped, bringing it in line
with the standard kselftest output by removing the test name - we move
from
ok 0 skipped
to
ok 1 # SKIP fork_test
The old output was not following KTAP format for skips, and the
numbering was not standard or consistent with the reported plan.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2022 ARM Limited.
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* Original author: Mark Brown <broonie@kernel.org>
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*/
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include "kselftest.h"
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#define EXPECTED_TESTS 1
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int fork_test(void);
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int verify_fork(void);
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/*
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* If we fork the value in the parent should be unchanged and the
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* child should start with the same value. This is called from the
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* fork_test() asm function.
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*/
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int fork_test_c(void)
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{
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pid_t newpid, waiting;
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int child_status, parent_result;
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newpid = fork();
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if (newpid == 0) {
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/* In child */
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if (!verify_fork()) {
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ksft_print_msg("ZA state invalid in child\n");
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exit(0);
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} else {
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exit(1);
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}
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}
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if (newpid < 0) {
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ksft_print_msg("fork() failed: %d\n", newpid);
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return 0;
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}
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parent_result = verify_fork();
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if (!parent_result)
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ksft_print_msg("ZA state invalid in parent\n");
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for (;;) {
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waiting = waitpid(newpid, &child_status, 0);
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if (waiting < 0) {
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if (errno == EINTR)
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continue;
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ksft_print_msg("waitpid() failed: %d\n", errno);
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return 0;
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}
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if (waiting != newpid) {
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ksft_print_msg("waitpid() returned wrong PID\n");
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return 0;
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}
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if (!WIFEXITED(child_status)) {
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ksft_print_msg("child did not exit\n");
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return 0;
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}
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return WEXITSTATUS(child_status) && parent_result;
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}
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}
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int main(int argc, char **argv)
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{
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int ret, i;
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ksft_print_header();
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ksft_set_plan(EXPECTED_TESTS);
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ksft_print_msg("PID: %d\n", getpid());
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/*
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* This test is run with nolibc which doesn't support hwcap and
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* it's probably disproportionate to implement so instead check
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* for the default vector length configuration in /proc.
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*/
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ret = open("/proc/sys/abi/sme_default_vector_length", O_RDONLY, 0);
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if (ret >= 0) {
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ksft_test_result(fork_test(), "fork_test");
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} else {
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ksft_print_msg("SME not supported\n");
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for (i = 0; i < EXPECTED_TESTS; i++) {
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ksft_test_result_skip("fork_test\n");
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}
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}
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ksft_finished();
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return 0;
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}
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