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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cgroupv2_controller_enabled()
*
* Copyright (c) 2020 Oracle and/or its affiliates.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include <ftw.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
static const char * const PARENT_DIR = "test015cgroup";
static const mode_t MODE = S_IRWXU | S_IRWXG | S_IRWXO;
static const char * const CHILD_DIRS[] = {
"test1-v1cgroup",
"test2-rootcgroup",
"test3-ctrlrenabled",
"test4-ctrlrdisabled",
};
static const int CHILD_DIRS_CNT =
sizeof(CHILD_DIRS) / sizeof(CHILD_DIRS[0]);
static const char * const CONTROLLERS[] = {
"cpu",
"cpuset",
"io",
"memory",
"net_cls",
"pids",
};
static const int CONTROLLERS_CNT =
sizeof(CONTROLLERS) / sizeof(CONTROLLERS[0]);
static const enum cg_version_t VERSIONS[] = {
CGROUP_V2,
CGROUP_V1,
CGROUP_V2,
CGROUP_V2,
CGROUP_V2,
CGROUP_V2,
};
static const int VERSIONS_CNT =
sizeof(VERSIONS) / sizeof(VERSIONS[0]);
class CgroupV2ControllerEnabled : public ::testing::Test {
protected:
void InitChildDir(const char dirname[])
{
char tmp_path[FILENAME_MAX] = {0};
int ret;
/* create the directory */
snprintf(tmp_path, FILENAME_MAX - 1, "%s/%s",
PARENT_DIR, dirname);
ret = mkdir(tmp_path, MODE);
ASSERT_EQ(ret, 0);
}
void InitMountTable(void)
{
char tmp_path[FILENAME_MAX] = {0};
int ret, i;
FILE *f;
ASSERT_EQ(VERSIONS_CNT, CONTROLLERS_CNT);
snprintf(tmp_path, FILENAME_MAX - 1,
"%s/cgroup.subtree_control", PARENT_DIR);
f = fopen(tmp_path, "w");
ASSERT_NE(f, nullptr);
fprintf(f, "cpu io memory pids\n");
fclose(f);
/*
* Artificially populate the mount table with local
* directories
*/
memset(&cg_mount_table, 0, sizeof(cg_mount_table));
memset(&cg_namespace_table, 0, sizeof(cg_namespace_table));
for (i = 0; i < CONTROLLERS_CNT; i++) {
snprintf(cg_mount_table[i].name, CONTROL_NAMELEN_MAX,
"%s", CONTROLLERS[i]);
snprintf(cg_mount_table[i].mount.path, FILENAME_MAX,
"%s", PARENT_DIR);
cg_mount_table[i].version = VERSIONS[i];
}
}
void SetUp() override
{
int ret, i;
ret = mkdir(PARENT_DIR, MODE);
ASSERT_EQ(ret, 0);
InitMountTable();
for (i = 0; i < CHILD_DIRS_CNT; i++)
InitChildDir(CHILD_DIRS[i]);
}
/*
* https://stackoverflow.com/questions/5467725/how-to-delete-a-directory-and-its-contents-in-posix-c
*/
static int unlink_cb(const char *fpath, const struct stat *sb, int typeflag,
struct FTW *ftwbuf)
{
return remove(fpath);
}
int rmrf(const char * const path)
{
return nftw(path, unlink_cb, 64, FTW_DEPTH | FTW_PHYS);
}
void TearDown() override
{
int ret = 0;
ret = rmrf(PARENT_DIR);
ASSERT_EQ(ret, 0);
}
};
TEST_F(CgroupV2ControllerEnabled, CgroupV1Controller)
{
char ctrlr_name[] = "cpuset";
char cg_name[] = "foo";
int ret;
ret = cgroupv2_controller_enabled(cg_name, ctrlr_name);
ASSERT_EQ(ret, 0);
}
TEST_F(CgroupV2ControllerEnabled, RootCgroup)
{
char ctrlr_name[] = "cpu";
char cg_name[] = "/";
int ret;
ret = cgroupv2_controller_enabled(cg_name, ctrlr_name);
ASSERT_EQ(ret, 0);
}
TEST_F(CgroupV2ControllerEnabled, ControllerEnabled)
{
char ctrlr_name[] = "pids";
char cg_name[] = "test3-ctrlrenabled";
int ret;
ret = cgroupv2_controller_enabled(cg_name, ctrlr_name);
ASSERT_EQ(ret, 0);
}
TEST_F(CgroupV2ControllerEnabled, ControllerDisabled)
{
char ctrlr_name[] = "net_cls";
char cg_name[] = "test4-ctrlrdisabled";
int ret;
ret = cgroupv2_controller_enabled(cg_name, ctrlr_name);
ASSERT_EQ(ret, ECGROUPNOTMOUNTED);
}
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