[LTP] [PATCH v1 7/8] Rewrite userns07.c using new LTP API

[Andrea Cervesato]

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
 testcases/kernel/containers/userns/userns07.c | 126 ++++++++----------
 1 file changed, 52 insertions(+), 74 deletions(-)

diff --git a/testcases/kernel/containers/userns/userns07.c b/testcases/kernel/containers/userns/userns07.c
index 49915969e..03b2a49fe 100644
--- a/testcases/kernel/containers/userns/userns07.c
+++ b/testcases/kernel/containers/userns/userns07.c
@@ -1,47 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) Huawei Technologies Co., Ltd., 2015
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
+ * Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
  */
 
-/*
+/*\
+ * [Description]
+ *
  * Verify that:
  * The kernel imposes a limit of at least 32 nested levels on user namespaces.
  */
 
 #define _GNU_SOURCE
-#include <sys/wait.h>
-#include <assert.h>
+
 #include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include "userns_helper.h"
-#include "test.h"
+#include <stdbool.h>
+#include <sys/wait.h>
+#include "common.h"
+#include "tst_test.h"
 
 #define MAXNEST 32
 
-char *TCID = "userns07";
-int TST_TOTAL = 1;
-
 static void setup(void)
 {
 	check_newuser();
-	tst_tmpdir();
-	TST_CHECKPOINT_INIT(NULL);
-}
-
-static void cleanup(void)
-{
-	tst_rmdir();
 }
 
 static int child_fn1(void *arg)
@@ -52,40 +34,42 @@ static int child_fn1(void *arg)
 	int parentuid;
 	int parentgid;
 
-	TST_SAFE_CHECKPOINT_WAIT(NULL, 0);
+	TST_CHECKPOINT_WAIT(0);
 
-	if (level == MAXNEST)
+	if (level == MAXNEST) {
+		tst_res(TPASS, "nested all children");
 		return 0;
-	cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
-		(void *)child_fn1, (void *)(level + 1));
-	if (cpid1 < 0) {
-		printf("level %ld:unexpected error: (%d) %s\n",
-			level, errno, strerror(errno));
+	}
+
+	TEST(ltp_clone_quick(CLONE_NEWUSER | SIGCHLD, (void *)child_fn1,
+			     (void *)(level + 1)));
+	if (TST_RET < 0) {
+		tst_res(TFAIL, "level %ld, unexpected error: (%d) %s", level,
+			TST_ERR, tst_strerrno(TST_ERR));
 		return 1;
 	}
 
+	cpid1 = (int)TST_RET;
+
 	parentuid = geteuid();
 	parentgid = getegid();
 
-	updatemap(cpid1, UID_MAP, 0, parentuid, NULL);
-	updatemap(cpid1, GID_MAP, 0, parentgid, NULL);
+	updatemap(cpid1, UID_MAP, 0, parentuid);
+	updatemap(cpid1, GID_MAP, 0, parentgid);
 
-	TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
+	TST_CHECKPOINT_WAKE(0);
 
-	if (waitpid(cpid1, &status, 0) == -1)
-		return 1;
+	SAFE_WAITPID(cpid1, &status, 0);
+
+	if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
+		tst_brk(TBROK, "child exited abnormally %s", tst_strstatus(status));
+	else if (WIFSIGNALED(status))
+		tst_brk(TBROK, "child was killed with signal = %d", WTERMSIG(status));
 
-	if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
-		printf("child exited abnormally\n");
-		return 1;
-	} else if (WIFSIGNALED(status)) {
-		printf("child was killed with signal = %d", WTERMSIG(status));
-		return 1;
-	}
 	return 0;
 }
 
-static void test_max_nest(void)
+static void run(void)
 {
 	pid_t cpid1;
 	int parentuid;
@@ -93,41 +77,35 @@ static void test_max_nest(void)
 	int fd;
 	char path[BUFSIZ];
 
-	cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
-		(void *)child_fn1, (void *)0);
+	cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD, (void *)child_fn1, (void *)0);
 	if (cpid1 < 0)
-		tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
+		tst_brk(TBROK | TTERRNO, "clone failed");
 
 	parentuid = geteuid();
 	parentgid = getegid();
 
 	if (access("/proc/self/setgroups", F_OK) == 0) {
 		sprintf(path, "/proc/%d/setgroups", cpid1);
-		fd = SAFE_OPEN(cleanup, path, O_WRONLY, 0644);
-		SAFE_WRITE(cleanup, 1, fd, "deny", 4);
-		SAFE_CLOSE(cleanup, fd);
-	}
-
-	updatemap(cpid1, UID_MAP, 0, parentuid, cleanup);
-	updatemap(cpid1, GID_MAP, 0, parentgid, cleanup);
 
-	TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
-	tst_record_childstatus(cleanup, cpid1);
-}
-
-int main(int argc, char *argv[])
-{
-	int lc;
-
-	setup();
-	tst_parse_opts(argc, argv, NULL, NULL);
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-		test_max_nest();
+		fd = SAFE_OPEN(path, O_WRONLY, 0644);
+		SAFE_WRITE(1, fd, "deny", 4);
+		SAFE_CLOSE(fd);
 	}
 
-	cleanup();
-	tst_exit();
+	updatemap(cpid1, UID_MAP, 0, parentuid);
+	updatemap(cpid1, GID_MAP, 0, parentgid);
+
+	TST_CHECKPOINT_WAKE(0);
 }
 
+static struct tst_test test = {
+	.setup = setup,
+	.test_all = run,
+	.needs_root = 1,
+	.needs_checkpoints = 1,
+	.needs_kconfigs =
+		(const char *[]){
+			"CONFIG_USER_NS",
+			NULL,
+		},
+};
-- 
2.35.1