[LTP] [PATCH v5] kill01: New case cgroup kill

Wei Gao via ltp
2023-03-07T08:52:14Z

Signed-off-by: Wei Gao <wegao@suse.com>
---
lib/tst_cgroup.c | 1 +
runtest/controllers | 1 +
testcases/kernel/controllers/kill/.gitignore | 1 +
testcases/kernel/controllers/kill/Makefile | 6 +
testcases/kernel/controllers/kill/kill01.c | 138 +++++++++++++++++++
5 files changed, 147 insertions(+)
create mode 100644 testcases/kernel/controllers/kill/.gitignore
create mode 100644 testcases/kernel/controllers/kill/Makefile
create mode 100644 testcases/kernel/controllers/kill/kill01.c

diff --git a/lib/tst_cgroup.c b/lib/tst_cgroup.c
index 50699bc63..77575431d 100644
--- a/lib/tst_cgroup.c
+++ b/lib/tst_cgroup.c
@@ -166,6 +166,7 @@ static const struct cgroup_file cgroup_ctrl_files[] = {
{ "cgroup.controllers", NULL, 0 },
{ "cgroup.subtree_control", NULL, 0 },
{ "cgroup.clone_children", "cgroup.clone_children", 0 },
+ { "cgroup.kill", NULL, 0 },
{ }
};

diff --git a/runtest/controllers b/runtest/controllers
index 8d1b936bf..2f69a8ec2 100644
--- a/runtest/controllers
+++ b/runtest/controllers
@@ -23,6 +23,7 @@ memcontrol01 memcontrol01
memcontrol02 memcontrol02
memcontrol03 memcontrol03
memcontrol04 memcontrol04
+kill01 kill01

cgroup_fj_function_debug cgroup_fj_function.sh debug
cgroup_fj_function_cpuset cgroup_fj_function.sh cpuset
diff --git a/testcases/kernel/controllers/kill/.gitignore b/testcases/kernel/controllers/kill/.gitignore
new file mode 100644
index 000000000..4f9649e27
--- /dev/null
+++ b/testcases/kernel/controllers/kill/.gitignore
@@ -0,0 +1 @@
+/kill01
diff --git a/testcases/kernel/controllers/kill/Makefile b/testcases/kernel/controllers/kill/Makefile
new file mode 100644
index 000000000..5ea7d67db
--- /dev/null
+++ b/testcases/kernel/controllers/kill/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/controllers/kill/kill01.c b/testcases/kernel/controllers/kill/kill01.c
new file mode 100644
index 000000000..432747e16
--- /dev/null
+++ b/testcases/kernel/controllers/kill/kill01.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2012 Christian Brauner <brauner-AT-kernel.org>
+ * Copyright (c) 2023 SUSE LLC <wegao@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Basic cgroup kill test.
+ *
+ */
+
+#include <errno.h>
+#include <linux/limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include "lapi/syscalls.h"
+#include "tst_test.h"
+
+#define MAX_PID_NUM 100
+#define pid_num MIN(MAX_PID_NUM, (tst_ncpus_available() + 1))
+#define buf_len (20 * pid_num)
+
+static char *buf;
+static struct tst_cg_group *cg_child_test_simple;
+
+static int wait_for_pid(pid_t pid)
+{
+ int status, ret;
+
+again:
+ ret = waitpid(pid, &status, 0);
+ if (ret == -1) {
+ if (errno == EINTR)
+ goto again;
+
+ return -1;
+ }
+
+ if (!WIFEXITED(status))
+ return -1;
+
+ return WEXITSTATUS(status);
+}
+
+/*
+ * A simple process running in a sleep loop until being
+ * re-parented.
+ */
+static void child_fn(void)
+{
+ int ppid = getppid();
+
+ while (getppid() == ppid)
+ usleep(1000);
+
+}
+
+static int cg_run_nowait(const struct tst_cg_group *const cg,
+ void (*fn)(void))
+{
+ int pid;
+
+ pid = SAFE_FORK();
+ if (pid == 0) {
+ SAFE_CG_PRINTF(cg, "cgroup.procs", "%d", getpid());
+ fn();
+ }
+
+ return pid;
+}
+
+static int cg_wait_for_proc_count(const struct tst_cg_group *cg, int count)
+{
+ int attempts;
+ char *ptr;
+
+ for (attempts = 100; attempts >= 0; attempts--) {
+ int nr = 0;
+
+ SAFE_CG_READ(cg, "cgroup.procs", buf, buf_len);
+
+ for (ptr = buf; *ptr; ptr++)
+ if (*ptr == '\n')
+ nr++;
+
+ if (nr >= count)
+ return 0;
+
+ usleep(100000);
+ }
+
+ return -1;
+}
+
+static void run(void)
+{
+ pid_t pids[MAX_PID_NUM];
+ int i;
+
+ cg_child_test_simple = tst_cg_group_mk(tst_cg, "cg_test_simple");
+
+ memset(buf, 0, buf_len);
+
+ for (i = 0; i < pid_num; i++)
+ pids[i] = cg_run_nowait(cg_child_test_simple, child_fn);
+
+ TST_EXP_PASS(cg_wait_for_proc_count(cg_child_test_simple, pid_num));
+ SAFE_CG_PRINTF(cg_child_test_simple, "cgroup.kill", "%d", 1);
+
+ for (i = 0; i < pid_num; i++) {
+ /* wait_for_pid(pids[i]); */
+ TST_EXP_PASS_SILENT(wait_for_pid(pids[i]) == SIGKILL);
+ }
+
+ cg_child_test_simple = tst_cg_group_rm(cg_child_test_simple);
+}
+
+static void setup(void)
+{
+ buf = tst_alloc(buf_len);
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .forks_child = 1,
+ .max_runtime = 15,
+ .needs_cgroup_ctrls = (const char *const []){ "memory", NULL },
+ .needs_cgroup_ver = TST_CG_V2,
+};
--
2.35.3