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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cgroupv2_get_subtree_control()
*
* Copyright (c) 2020 Oracle and/or its affiliates.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include <fcntl.h>
#include <ftw.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
static const char * const PARENT_DIR = "test013cgroup/";
static const char * const SUBTREE_FILE = "cgroup.subtree_control";
class GetSubtreeControlTest : public ::testing::Test {
protected:
void SetUp() override {
char tmp_path[FILENAME_MAX];
int ret, i;
FILE *f;
ret = mkdir(PARENT_DIR, S_IRWXU | S_IRWXG | S_IRWXO);
ASSERT_EQ(ret, 0);
}
/*
* 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;
ret = rmrf(PARENT_DIR);
ASSERT_EQ(ret, 0);
}
};
static void write_subtree_file(const char * const contents, ssize_t len)
{
char tmp_path[FILENAME_MAX];
ssize_t bytes_written;
int ret, fd;
memset(tmp_path, 0, sizeof(tmp_path));
ret = snprintf(tmp_path, FILENAME_MAX - 1, "%s%s",
PARENT_DIR, SUBTREE_FILE);
ASSERT_GT(ret, 0);
fd = open(tmp_path, O_WRONLY | O_TRUNC | O_CREAT, S_IRWXU | S_IRWXG);
ASSERT_GT(fd, 0);
bytes_written = write(fd, contents, len);
ASSERT_EQ(bytes_written, len);
close(fd);
}
TEST_F(GetSubtreeControlTest, SingleControllerEnabled)
{
char ctrlr_name[] = "cpu";
char subtree_contents[] = "cpu\n";
bool enabled = false;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, 0);
ASSERT_EQ(enabled, true);
}
TEST_F(GetSubtreeControlTest, SingleControllerNoMatch)
{
char ctrlr_name[] = "cpu";
char subtree_contents[] = "cpuset\n";
bool enabled = true;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, ECGROUPNOTMOUNTED);
ASSERT_EQ(enabled, false);
}
TEST_F(GetSubtreeControlTest, SingleControllerNoMatch2)
{
char ctrlr_name[] = "cpuset";
char subtree_contents[] = "cpu\n";
bool enabled = true;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, ECGROUPNOTMOUNTED);
ASSERT_EQ(enabled, false);
}
TEST_F(GetSubtreeControlTest, MultipleControllersEnabled)
{
char ctrlr_name[] = "cpu";
char subtree_contents[] = "cpu cpuset io memory pids\n";
bool enabled = false;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, 0);
ASSERT_EQ(enabled, true);
}
TEST_F(GetSubtreeControlTest, MultipleControllersEnabled2)
{
char ctrlr_name[] = "pids";
char subtree_contents[] = "cpu cpuset io memory pids\n";
bool enabled = false;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, 0);
ASSERT_EQ(enabled, true);
}
TEST_F(GetSubtreeControlTest, MultipleControllersNoMatch)
{
char ctrlr_name[] = "network";
char subtree_contents[] = "cpu cpuset io memory pids\n";
bool enabled = true;
int ret;
write_subtree_file(subtree_contents, strlen(subtree_contents));
ret = cgroupv2_get_subtree_control(PARENT_DIR, ctrlr_name, &enabled);
ASSERT_EQ(ret, ECGROUPNOTMOUNTED);
ASSERT_EQ(enabled, false);
}
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