[LTP] [PATCH V3] container: new testcase pidns32

[LTP] [PATCH V3] container: new testcase pidns32

[Yuan Sun]

Kernel imposes a limit of 32 nested levels of pid namespaces.

Signed-off-by: Yuan Sun <sunyuan3@huawei.com>
---
 runtest/containers                           |   1 +
 testcases/kernel/containers/pidns/.gitignore |   1 +
 testcases/kernel/containers/pidns/pidns32.c  | 103 +++++++++++++++++++++++++++
 3 files changed, 105 insertions(+)
 create mode 100644 testcases/kernel/containers/pidns/pidns32.c

diff --git a/runtest/containers b/runtest/containers
index 9dc44bc..ac37ab2 100644
--- a/runtest/containers
+++ b/runtest/containers
@@ -13,6 +13,7 @@ pidns17 pidns17
 pidns20 pidns20
 pidns30 pidns30
 pidns31 pidns31
+pidns32 pidns32
 
 mqns_01 mqns_01
 mqns_01_clone mqns_01 -clone
diff --git a/testcases/kernel/containers/pidns/.gitignore b/testcases/kernel/containers/pidns/.gitignore
index e56c1f9..488b045 100644
--- a/testcases/kernel/containers/pidns/.gitignore
+++ b/testcases/kernel/containers/pidns/.gitignore
@@ -12,3 +12,4 @@
 /pidns20
 /pidns30
 /pidns31
+/pidns32
diff --git a/testcases/kernel/containers/pidns/pidns32.c b/testcases/kernel/containers/pidns/pidns32.c
new file mode 100644
index 0000000..fe530d3
--- /dev/null
+++ b/testcases/kernel/containers/pidns/pidns32.c
@@ -0,0 +1,103 @@
+/*
+ * 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:
+ * The kernel imposes a limit of 32 nested levels of pid 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 "test.h"
+#include "pidns_helper.h"
+
+#define MAXNEST 32
+
+char *TCID = "pidns32";
+int TST_TOTAL = 1;
+
+static void setup(void)
+{
+	if (tst_kvercmp(3, 7, 0) < 0)
+		tst_brkm(TCONF, NULL, "nest depth limitation not supported");
+	tst_require_root();
+	check_newpid();
+	tst_tmpdir();
+}
+
+static void cleanup(void)
+{
+	tst_rmdir();
+}
+
+static int child_fn1(void *arg)
+{
+	pid_t cpid1;
+	long level = (long)arg;
+	int status;
+
+	if (level == MAXNEST)
+		return 0;
+	cpid1 = ltp_clone_quick(CLONE_NEWPID | SIGCHLD,
+		(void *)child_fn1, (void *)(level + 1));
+	if (cpid1 < 0) {
+		printf("level %ld:unexpected error: (%d) %s\n",
+			level, errno, strerror(errno));
+		return -1;
+	}
+	if (waitpid(cpid1, &status, 0) == -1)
+		return -1;
+
+	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)
+{
+	pid_t cpid1;
+
+	cpid1 = ltp_clone_quick(CLONE_NEWPID | SIGCHLD,
+		(void *)child_fn1, (void *)1);
+	if (cpid1 < 0)
+		tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
+
+	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();
+	}
+
+	cleanup();
+	tst_exit();
+}
-- 
1.9.1


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Re: [LTP] [PATCH V3] container: new testcase pidns32

[Jan Stancek]

----- Original Message -----
> From: "Yuan Sun" <sunyuan3@huawei.com>
> To: jstancek@redhat.com
> Cc: ltp-list@lists.sourceforge.net
> Sent: Friday, 14 August, 2015 10:17:24 AM
> Subject: [PATCH V3] container: new testcase pidns32
> 
> Kernel imposes a limit of 32 nested levels of pid namespaces.
> 
> Signed-off-by: Yuan Sun <sunyuan3@huawei.com>

Hi,

pushed with updated commit message and removed kernel version check.
Since we expect that 32 levels will work on any kernel, there's
no need for it now.

Regards,
Jan

> ---
>  runtest/containers                           |   1 +
>  testcases/kernel/containers/pidns/.gitignore |   1 +
>  testcases/kernel/containers/pidns/pidns32.c  | 103
>  +++++++++++++++++++++++++++
>  3 files changed, 105 insertions(+)
>  create mode 100644 testcases/kernel/containers/pidns/pidns32.c
> 

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Re: [LTP] [PATCH V3] container: new testcase pidns32

[Yuan Sun]

On 2015/8/17 21:33, Jan Stancek wrote:
>
>
>
> ----- Original Message -----
>> From: "Yuan Sun" <sunyuan3@huawei.com>
>> To: jstancek@redhat.com
>> Cc: ltp-list@lists.sourceforge.net
>> Sent: Friday, 14 August, 2015 10:17:24 AM
>> Subject: [PATCH V3] container: new testcase pidns32
>>
>> Kernel imposes a limit of 32 nested levels of pid namespaces.
>>
>> Signed-off-by: Yuan Sun <sunyuan3@huawei.com>
> Hi,
>
> pushed with updated commit message and removed kernel version check.
> Since we expect that 32 levels will work on any kernel, there's
> no need for it now.
Yes, you are right. I agree with you. Thank you.
     Yuan
>
> Regards,
> Jan
>
>> ---
>>   runtest/containers                           |   1 +
>>   testcases/kernel/containers/pidns/.gitignore |   1 +
>>   testcases/kernel/containers/pidns/pidns32.c  | 103
>>   +++++++++++++++++++++++++++
>>   3 files changed, 105 insertions(+)
>>   create mode 100644 testcases/kernel/containers/pidns/pidns32.c
>>
>


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