[LTP] [PATCH V3] containers: new testcase userns04

* [LTP] [PATCH V3] containers: new testcase userns04
@ 2015-06-17 12:56 Yuan Sun
  2015-06-17  4:55 ` Yuan Sun
  0 siblings, 1 reply; 2+ messages in thread
From: Yuan Sun @ 2015-06-17 12:56 UTC (permalink / raw)
  To: jstancek; +Cc: ltp-list

  If a namespace isn't aother namespace's ancestor, the first namespace
does not have the CAP_SYS_ADMIN capability in the second namespace
and the setns() call fails.

Signed-off-by: Yuan Sun <sunyuan3@huawei.com>
---
 testcases/kernel/containers/userns/userns04.c | 134 ++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 testcases/kernel/containers/userns/userns04.c

diff --git a/testcases/kernel/containers/userns/userns04.c b/testcases/kernel/containers/userns/userns04.c
new file mode 100644
index 0000000..c1690c9
--- /dev/null
+++ b/testcases/kernel/containers/userns/userns04.c
@@ -0,0 +1,134 @@
+/*
+ * 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.
+ */
+
+/*
+ * Verify that:
+ *  If a namespace isn't another namespace's ancestor, the first namespace
+ *  does not have the CAP_SYS_ADMIN capability in the second namespace
+ *  and the setns() call fails.
+ */
+
+#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 "test.h"
+#include "userns_helper.h"
+
+char *TCID = "user_namespace4";
+int TST_TOTAL = 1;
+
+static void setup(void)
+{
+	check_newuser();
+	tst_tmpdir();
+	TST_CHECKPOINT_INIT(NULL);
+}
+
+static void cleanup(void)
+{
+	tst_rmdir();
+}
+
+/*
+ * child_fn1() - Inside a new user namespace
+ */
+static int child_fn1(void)
+{
+	TST_SAFE_CHECKPOINT_WAIT(cleanup, 0);
+	return 0;
+}
+
+static int child_fn2(int *arg)
+{
+	int exit_val;
+
+	if (setns(*arg, CLONE_NEWUSER) == -1) {
+		printf("child2 setns() failure is expected\n");
+		exit_val = 0;
+	} else {
+		printf("chile2 setns() success isn't expected\n");
+		exit_val = 1;
+	}
+
+	TST_SAFE_CHECKPOINT_WAIT(NULL, 1);
+	return exit_val;
+}
+
+int main(int argc, char *argv[])
+{
+	int cpid1status, cpid2status;
+	int cpid1, cpid2;
+	char path[BUFSIZ];
+	int fd;
+
+	tst_parse_opts(argc, argv, NULL, NULL);
+	setup();
+/*
+TEST_LOOPING isn't used because the parent pid can't reset to the
+previous namespace after it joins another namespace by setns.
+*/
+	tst_count = 0;
+	cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
+		(void *)child_fn1, NULL);
+
+	if (cpid1 < 0)
+		tst_brkm(TFAIL | TERRNO, cleanup, "clone failed");
+
+	sprintf(path, "/proc/%d/ns/user", cpid1);
+	fd = SAFE_OPEN(cleanup, path, O_RDONLY, 0644);
+
+	cpid2 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
+		(void *)child_fn2, &fd);
+
+	if (cpid2 < 0)
+		tst_brkm(TFAIL | TERRNO, cleanup, "clone failed");
+
+	if (setns(fd, CLONE_NEWUSER) == -1)
+		tst_brkm(TFAIL, cleanup, "parent pid setns failure");
+	else
+		tst_resm(TINFO, "parent pid setns success");
+
+	TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
+	TST_SAFE_CHECKPOINT_WAKE(cleanup, 1);
+
+	if ((waitpid(cpid1, &cpid1status, 0) < 0) ||
+		(waitpid(cpid2, &cpid2status, 0) < 0))
+		tst_brkm(TBROK | TERRNO, cleanup,
+			"parent: waitpid failed.");
+
+	if (WIFSIGNALED(cpid1status)) {
+		tst_resm(TFAIL, "child1 was killed with signal = %d",
+			WTERMSIG(cpid1status));
+	} else if (WIFEXITED(cpid1status) &&
+		WEXITSTATUS(cpid1status) != 0) {
+		tst_resm(TFAIL, "child1 exited abnormally");
+	}
+
+	if (WIFSIGNALED(cpid2status)) {
+		tst_resm(TFAIL, "child2 was killed with signal = %d",
+			WTERMSIG(cpid2status));
+	} else if (WIFEXITED(cpid2status) &&
+		WEXITSTATUS(cpid2status) != 0) {
+		tst_resm(TFAIL, "child2 exited abnormally");
+	} else
+		tst_resm(TPASS, "The setns function works well.");
+
+	cleanup();
+	tst_exit();
+}
+
-- 
1.9.1


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