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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cgroup_create_cgroup()
*
* Copyright (c) 2020 Oracle and/or its affiliates.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include <dirent.h>
#include <ftw.h>
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
static const char * const PARENT_DIR = "test012cgroup";
static const mode_t MODE = S_IRWXU | S_IRWXG | S_IRWXO;
static const char * const CONTROLLERS[] = {
"cpu",
"freezer",
"memory",
"cpuset",
"namespaces",
"netns",
};
static const int CONTROLLERS_CNT =
sizeof(CONTROLLERS) / sizeof(CONTROLLERS[0]);
static cg_version_t VERSIONS[] = {
CGROUP_V1,
CGROUP_V2,
CGROUP_V2,
CGROUP_V1,
CGROUP_V1,
CGROUP_V2,
};
static const int VERSIONS_CNT =
sizeof(VERSIONS) / sizeof(VERSIONS[0]);
class CgroupCreateCgroupTest : public ::testing::Test {
protected:
void SetUp() override
{
char tmp_path[FILENAME_MAX];
int ret, i;
FILE *f;
ASSERT_EQ(VERSIONS_CNT, CONTROLLERS_CNT);
ret = mkdir(PARENT_DIR, MODE);
ASSERT_EQ(ret, 0);
/*
* 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]);
cg_mount_table[i].version = VERSIONS[i];
switch (VERSIONS[i]) {
case CGROUP_V1:
snprintf(cg_mount_table[i].mount.path,
FILENAME_MAX, "%s/%s", PARENT_DIR,
CONTROLLERS[i]);
ret = mkdir(cg_mount_table[i].mount.path, MODE);
ASSERT_EQ(ret, 0);
break;
case CGROUP_V2:
snprintf(cg_mount_table[i].mount.path,
FILENAME_MAX, "%s", PARENT_DIR);
memset(tmp_path, 0, sizeof(tmp_path));
snprintf(tmp_path, FILENAME_MAX - 1,
"%s/cgroup.subtree_control",
PARENT_DIR);
f = fopen(tmp_path, "w");
ASSERT_NE(f, nullptr);
fclose(f);
break;
default:
/* we shouldn't get here. fail the test */
ASSERT_TRUE(false);
}
}
}
/*
* 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);
}
};
static void verify_cgroup_created(const char * const cg_name,
const char * const ctrl)
{
char tmp_path[FILENAME_MAX];
DIR *dir;
memset(tmp_path, 0, sizeof(tmp_path));
if (ctrl)
snprintf(tmp_path, FILENAME_MAX - 1, "%s/%s/%s",
PARENT_DIR, ctrl, cg_name);
else
snprintf(tmp_path, FILENAME_MAX - 1, "%s/%s",
PARENT_DIR, cg_name);
dir = opendir(tmp_path);
ASSERT_NE(dir, nullptr);
closedir(dir);
}
static void verify_subtree_contents(const char * const expected)
{
char tmp_path[FILENAME_MAX], buf[4092];
FILE *f;
memset(tmp_path, 0, sizeof(tmp_path));
snprintf(tmp_path, FILENAME_MAX - 1, "%s/cgroup.subtree_control",
PARENT_DIR);
f = fopen(tmp_path, "r");
ASSERT_NE(f, nullptr);
while (fgets(buf, sizeof(buf), f))
ASSERT_STREQ(buf, expected);
fclose(f);
}
TEST_F(CgroupCreateCgroupTest, CgroupCreateCgroupV1)
{
struct cgroup_controller *ctrl;
struct cgroup *cg = NULL;
const char * const ctrl_name = "cpu";
const char * const cg_name = "MyV1Cgroup";
int ret;
cg = cgroup_new_cgroup(cg_name);
ASSERT_NE(cg, nullptr);
ctrl = cgroup_add_controller(cg, ctrl_name);
ASSERT_NE(ctrl, nullptr);
ret = cgroup_create_cgroup(cg, 1);
ASSERT_EQ(ret, 0);
verify_cgroup_created(cg_name, ctrl_name);
}
TEST_F(CgroupCreateCgroupTest, CgroupCreateCgroupV2)
{
struct cgroup_controller *ctrl;
struct cgroup *cg = NULL;
const char * const ctrl_name = "freezer";
const char * const cg_name = "MyV2Cgroup";
int ret;
cg = cgroup_new_cgroup(cg_name);
ASSERT_NE(cg, nullptr);
ctrl = cgroup_add_controller(cg, ctrl_name);
ASSERT_NE(ctrl, nullptr);
ret = cgroup_create_cgroup(cg, 0);
ASSERT_EQ(ret, 0);
verify_cgroup_created(cg_name, NULL);
verify_subtree_contents("+freezer");
}
TEST_F(CgroupCreateCgroupTest, CgroupCreateCgroupV1AndV2)
{
struct cgroup_controller *ctrl;
struct cgroup *cg = NULL;
const char * const ctrl1_name = "memory";
const char * const ctrl2_name = "cpuset";
const char * const cg_name = "MyV1AndV2Cgroup";
int ret;
cg = cgroup_new_cgroup(cg_name);
ASSERT_NE(cg, nullptr);
ctrl = cgroup_add_controller(cg, ctrl1_name);
ASSERT_NE(ctrl, nullptr);
ctrl = NULL;
ctrl = cgroup_add_controller(cg, ctrl2_name);
ASSERT_NE(ctrl, nullptr);
ret = cgroup_create_cgroup(cg, 1);
ASSERT_EQ(ret, 0);
verify_cgroup_created(cg_name, NULL);
verify_cgroup_created(cg_name, ctrl2_name);
verify_subtree_contents("+memory");
}
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