selftests/pidfd/pidfd_fdinfo_test.c

25 static int error_set(struct error *err, int code, const char *fmt, ...)
30 	if (code == PIDFD_PASS || !err || err->code != PIDFD_PASS)
33 	err->code = code;
35 	r = vsnprintf(err->msg, sizeof(err->msg), fmt, args);
36 	assert((size_t)r < sizeof(err->msg));
42 static void error_report(struct error *err, const char *test_name)
44 	switch (err->code) {
46 		ksft_exit_fail_msg("%s test: Fatal: %s\n", test_name, err->msg);
51 		ksft_test_result_error("%s test: %s\n", test_name, err->msg);
56 		ksft_test_result_skip("%s test: %s\n", test_name, err->msg);
61 				      test_name, err->msg);
70 				   test_name, err->code, err->msg);
75 static inline int error_check(struct error *err, const char *test_name)
78 	if (err->code == PIDFD_ERROR)
79 		error_report(err, test_name);
81 	return err->code;
93 				struct error *err)
104 		error_set(err, -1, "mmap of stack failed (errno %d)", errno);
115 		error_set(err, PIDFD_ERROR, "clone failed (ret %d, errno %d)",
130 static inline int child_join(struct child *child, struct error *err)
136 		error_set(err, PIDFD_ERROR, "waitpid failed (ret %d, errno %d)",
139 		error_set(err, r, "child %d reported: %d", child->pid, r);
142 		error_set(err, -1, "munmap of child stack failed (errno %d)", errno);
150 static inline int child_join_close(struct child *child, struct error *err)
153 	return child_join(child, err);
164 static int verify_fdinfo(int pidfd, struct error *err, const char *prefix,
184 		return error_set(err, PIDFD_ERROR, "fdinfo open failed for %d",
200 			error_set(err, PIDFD_FAIL, "%s '%s' != '%s'",
210 		return error_set(err, PIDFD_FAIL, "%s not found for fd %d",
218 	struct error err;
244 	r = verify_fdinfo(pidfd, &err, "NSpid:", 6, "\t0\n");
247 		ksft_print_msg("NSpid fdinfo check failed: %s\n", err.msg);
255 	struct error err = {0, };
259 	a = clone_newns(child_fdinfo_nspid_test, NULL, &err);
260 	error_check(&err, test_name);
267 	b = clone_newns(child_fdinfo_nspid_test, &a.fd, &err);
268 	error_check(&err, test_name);
273 	verify_fdinfo(a.fd, &err, "NSpid:", 6, "\t%d\t%d\n", a.pid, 1);
274 	verify_fdinfo(b.fd, &err, "NSpid:", 6, "\t%d\t%d\n", b.pid, 1);
277 	 * 'err' accordingly, if it is not already set.
279 	child_join_close(&a, &err);
280 	child_join_close(&b, &err);
282 	error_report(&err, test_name);
288 	struct error err = {0, };
292 	a = clone_newns(child_fdinfo_nspid_test, NULL, &err);
293 	error_check(&err, test_name);
294 	child_join(&a, &err);
296 	verify_fdinfo(a.fd, &err, "Pid:", 4, "\t-1\n");
297 	verify_fdinfo(a.fd, &err, "NSpid:", 6, "\t-1\n");
299 	error_report(&err, test_name);