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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cgroup_build_tasks_procs_path()
*
* Copyright (c) 2020 Oracle and/or its affiliates.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
class BuildTasksProcPathTest : public ::testing::Test {
protected:
/**
* Setup this test case
*
* This test case calls cg_build_path() to generate various
* cgroup paths. The SetUp() routine creates a simple mount
* table that can be used to verify cg_build_path() behavior.
*
* cg_mount_table for this test is as follows:
* name mount_point index version
* ----------------------------------------------------------
* controller0 /sys/fs/cgroup/controller0 0 UNK
* controller1 /sys/fs/cgroup/controller1 1 2
* controller2 /sys/fs/cgroup/controller2 2 1
* controller3 /sys/fs/cgroup/controller3 3 2
* controller4 /sys/fs/cgroup/controller4 4 1
* controller5 /sys/fs/cgroup/controller5 5 2
*
* Note that controllers 1 and 4 are also given namespaces
*/
void SetUp() override {
char NAMESPACE1[] = "ns1";
char NAMESPACE4[] = "ns4";
const int ENTRY_CNT = 6;
int i, ret;
memset(&cg_mount_table, 0, sizeof(cg_mount_table));
memset(cg_namespace_table, 0,
CG_CONTROLLER_MAX * sizeof(cg_namespace_table[0]));
// Populate the mount table
for (i = 0; i < ENTRY_CNT; i++) {
snprintf(cg_mount_table[i].name, CONTROL_NAMELEN_MAX,
"controller%d", i);
cg_mount_table[i].index = i;
ret = snprintf(cg_mount_table[i].mount.path, FILENAME_MAX,
"/sys/fs/cgroup/%s", cg_mount_table[i].name);
ASSERT_LT(ret, sizeof(cg_mount_table[i].mount.path));
cg_mount_table[i].mount.next = NULL;
if (i == 0)
cg_mount_table[i].version = CGROUP_UNK;
else
cg_mount_table[i].version =
(cg_version_t)((i % 2) + 1);
}
// Give a couple of the entries a namespace as well
cg_namespace_table[1] = NAMESPACE1;
cg_namespace_table[4] = NAMESPACE4;
}
};
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_ControllerNotFound)
{
char ctrlname[] = "InvalidCtrlr";
char path[FILENAME_MAX];
char cgname[] = "foo";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, ECGOTHER);
ASSERT_STREQ(path, "\0");
}
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_UnknownCgVersion)
{
char ctrlname[] = "controller0";
char path[FILENAME_MAX];
char cgname[] = "bar";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, ECGOTHER);
ASSERT_STREQ(path, "\0");
}
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_CgV1)
{
char ctrlname[] = "controller2";
char path[FILENAME_MAX];
char cgname[] = "Container7";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(path, "/sys/fs/cgroup/controller2/Container7/tasks");
}
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_CgV2)
{
char ctrlname[] = "controller3";
struct cgroup_controller ctrlr = {0};
char path[FILENAME_MAX];
char cgname[] = "tomcat";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(path, "/sys/fs/cgroup/controller3/tomcat/cgroup.procs");
}
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_CgV1WithNs)
{
char ctrlname[] = "controller4";
struct cgroup_controller ctrlr = {0};
char path[FILENAME_MAX];
char cgname[] = "database12";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(path, "/sys/fs/cgroup/controller4/ns4/database12/tasks");
}
TEST_F(BuildTasksProcPathTest, BuildTasksProcPathTest_CgV2WithNs)
{
char ctrlname[] = "controller1";
struct cgroup_controller ctrlr = {0};
char path[FILENAME_MAX];
char cgname[] = "server";
int ret;
ret = cgroup_build_tasks_procs_path(path, sizeof(path), cgname,
ctrlname);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(path, "/sys/fs/cgroup/controller1/ns1/server/cgroup.procs");
}
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