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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cgroup_process_v2_mnt()
*
* Copyright (c) 2020 Oracle and/or its affiliates.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include <ftw.h>
#include <mntent.h>
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
static const char * const PARENT_DIR = "test008cgroup";
static const char * const PARENT2_DIR = "test008cgroup2";
static const mode_t MODE = S_IRWXU | S_IRWXG | S_IRWXO;
static const char * const CONTROLLERS[] = {
"cpuset",
"cpu",
"io",
"memory",
"pids",
"rdma",
};
static const int CONTROLLERS_CNT =
sizeof(CONTROLLERS) / sizeof(CONTROLLERS[0]);
static int mnt_tbl_idx = 0;
class CgroupProcessV2MntTest : public ::testing::Test {
protected:
void CreateHierarchy(const char * const dir)
{
char tmp_path[FILENAME_MAX];
int i, ret;
FILE *f;
ret = mkdir(dir, MODE);
ASSERT_EQ(ret, 0);
memset(tmp_path, 0, sizeof(tmp_path));
snprintf(tmp_path, FILENAME_MAX - 1, "%s/cgroup.controllers",
dir);
f = fopen(tmp_path, "w");
ASSERT_NE(f, nullptr);
for (i = 0; i < CONTROLLERS_CNT; i++)
fprintf(f, "%s ", CONTROLLERS[i]);
fclose(f);
}
void SetUp() override
{
char tmp_path[FILENAME_MAX];
int i, ret;
FILE *f;
CreateHierarchy(PARENT_DIR);
/* make another directory to test the duplicate logic */
CreateHierarchy(PARENT2_DIR);
}
/*
* 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);
ret = rmrf(PARENT2_DIR);
ASSERT_EQ(ret, 0);
}
};
TEST_F(CgroupProcessV2MntTest, AddV2Mount)
{
char *mnt_dir = strdup(PARENT_DIR);
struct mntent ent = (struct mntent) {
.mnt_fsname = "cgroup2",
.mnt_dir = mnt_dir,
.mnt_type = "cgroup2",
.mnt_opts = "rw,relatime,seclabel",
};
int ret;
ret = cgroup_process_v2_mnt(&ent, &mnt_tbl_idx);
ASSERT_EQ(ret, 0);
ASSERT_EQ(mnt_tbl_idx, 7);
ASSERT_STREQ(cg_mount_table[0].name, "cpuset");
ASSERT_STREQ(cg_mount_table[1].name, "cpu");
ASSERT_STREQ(cg_mount_table[2].name, "io");
ASSERT_STREQ(cg_mount_table[3].name, "memory");
ASSERT_STREQ(cg_mount_table[4].name, "pids");
ASSERT_STREQ(cg_mount_table[5].name, "rdma");
ASSERT_STREQ(cg_mount_table[6].name, "cgroup");
ASSERT_STREQ(cg_mount_table[0].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[1].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[2].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[3].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[4].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[5].mount.path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[6].mount.path, ent.mnt_dir);
}
TEST_F(CgroupProcessV2MntTest, AddV2Mount_Duplicate)
{
char *mnt_dir = strdup(PARENT2_DIR);
struct mntent ent = (struct mntent) {
.mnt_fsname = "cgroup2",
.mnt_dir = mnt_dir,
.mnt_type = "cgroup2",
.mnt_opts = "rw,relatime,seclabel",
};
int ret;
ret = cgroup_process_v2_mnt(&ent, &mnt_tbl_idx);
ASSERT_EQ(ret, 0);
ASSERT_EQ(mnt_tbl_idx, 7);
ASSERT_STREQ(cg_mount_table[0].name, "cpuset");
ASSERT_STREQ(cg_mount_table[1].name, "cpu");
ASSERT_STREQ(cg_mount_table[2].name, "io");
ASSERT_STREQ(cg_mount_table[3].name, "memory");
ASSERT_STREQ(cg_mount_table[4].name, "pids");
ASSERT_STREQ(cg_mount_table[5].name, "rdma");
ASSERT_STREQ(cg_mount_table[6].name, "cgroup");
ASSERT_STREQ(cg_mount_table[0].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[1].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[2].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[3].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[4].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[5].mount.next->path, ent.mnt_dir);
ASSERT_STREQ(cg_mount_table[6].mount.next->path, ent.mnt_dir);
}
/*
* This test must be last because it makes destructive changes to the cgroup hierarchy
*/
TEST_F(CgroupProcessV2MntTest, EmptyControllersFile)
{
char tmp_path[FILENAME_MAX];
char *mnt_dir = strdup(PARENT_DIR);
struct mntent ent = (struct mntent) {
.mnt_fsname = "cgroup2",
.mnt_dir = mnt_dir,
.mnt_type = "cgroup2",
.mnt_opts = "rw,relatime,seclabel",
};
FILE *f;
int ret;
memset(tmp_path, 0, sizeof(tmp_path));
snprintf(tmp_path, FILENAME_MAX - 1, "%s/cgroup.controllers",
PARENT_DIR);
/* clear the cgroup.controllers file */
f = fopen(tmp_path, "w");
ASSERT_NE(f, nullptr);
fclose(f);
/* reset the mount table count */
mnt_tbl_idx = 0;
ret = cgroup_process_v2_mnt(&ent, &mnt_tbl_idx);
ASSERT_EQ(ret, ECGEOF);
ASSERT_EQ(mnt_tbl_idx, 0);
}
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