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/* SPDX-License-Identifier: LGPL-2.1-only */
/**
* libcgroup googletest for cg_get_cgroups_from_proc_cgroups()
*
* Copyright (c) 2019 Oracle and/or its affiliates. All rights reserved.
* Author: Tom Hromatka <tom.hromatka@oracle.com>
*/
#include "gtest/gtest.h"
#include "libcgroup-internal.h"
class GetCgroupsFromProcCgroupsTest : public ::testing::Test {
};
static void CreateCgroupProcFile(const char * const contents)
{
FILE *f;
f = fopen(TEST_PROC_PID_CGROUP_FILE, "w");
ASSERT_NE(f, nullptr);
fprintf(f, "%s", contents);
fclose(f);
}
TEST_F(GetCgroupsFromProcCgroupsTest, ReadSingleLine)
{
#undef LIST_LEN
#define LIST_LEN 3
char contents[] =
"5:pids:/user.slice/user-1000.slice/session-1.scope\n";
char *controller_list[LIST_LEN];
char *cgroup_list[LIST_LEN];
pid_t pid = 1234;
int ret, i;
for (i = 0; i < LIST_LEN; i++) {
controller_list[i] = NULL;
cgroup_list[i] = NULL;
}
CreateCgroupProcFile(contents);
ret = cg_get_cgroups_from_proc_cgroups(pid, cgroup_list,
controller_list, LIST_LEN);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(controller_list[0], "pids");
ASSERT_STREQ(cgroup_list[0],
"user.slice/user-1000.slice/session-1.scope");
}
TEST_F(GetCgroupsFromProcCgroupsTest, ReadSingleLine2)
{
#undef LIST_LEN
#define LIST_LEN 1
char contents[] =
"5:cpu,cpuacct:/\n";
char *controller_list[LIST_LEN];
char *cgroup_list[LIST_LEN];
pid_t pid = 1234;
int ret, i;
for (i = 0; i < LIST_LEN; i++) {
controller_list[i] = NULL;
cgroup_list[i] = NULL;
}
CreateCgroupProcFile(contents);
ret = cg_get_cgroups_from_proc_cgroups(pid, cgroup_list,
controller_list, LIST_LEN);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(controller_list[0], "cpu,cpuacct");
ASSERT_STREQ(cgroup_list[0], "/");
}
TEST_F(GetCgroupsFromProcCgroupsTest, ReadEmptyController)
{
#undef LIST_LEN
#define LIST_LEN 1
char contents[] =
"0::/user.slice/user-1000.slice/session-1.scope\n";
char *controller_list[LIST_LEN];
char *cgroup_list[LIST_LEN];
pid_t pid = 1234;
int ret, i;
for (i = 0; i < LIST_LEN; i++) {
controller_list[i] = NULL;
cgroup_list[i] = NULL;
}
CreateCgroupProcFile(contents);
ret = cg_get_cgroups_from_proc_cgroups(pid, cgroup_list,
controller_list, LIST_LEN);
ASSERT_EQ(ret, 0);
ASSERT_EQ(controller_list[0], nullptr);
ASSERT_EQ(cgroup_list[0], nullptr);
}
TEST_F(GetCgroupsFromProcCgroupsTest, ReadExampleFile)
{
char contents[] =
"12:memory:/user/johndoe/0\n"
"11:perf_event:/\n"
"10:rdma:/\n"
"9:blkio:/user.slice\n"
"8:cpu,cpuacct:/myCgroup\n"
"7:freezer:/user/johndoe/0\n"
"6:net_cls,net_prio:/\n"
"5:pids:/user.slice/user-1000.slice/session-1.scope\n"
"4:devices:/user.slice\n"
"3:cpuset:/\n"
"2:hugetlb:/\n"
"1:name=systemd:/user.slice/user-1000.slice/session-1.scope\n"
"0::/user.slice/user-1000.slice/session-1.scope\n";
char *controller_list[MAX_MNT_ELEMENTS];
char *cgroup_list[MAX_MNT_ELEMENTS];
pid_t pid = 5678;
int ret, i;
for (i = 0; i < MAX_MNT_ELEMENTS; i++) {
controller_list[i] = NULL;
cgroup_list[i] = NULL;
}
CreateCgroupProcFile(contents);
ret = cg_get_cgroups_from_proc_cgroups(pid, cgroup_list,
controller_list, MAX_MNT_ELEMENTS);
ASSERT_EQ(ret, 0);
ASSERT_STREQ(controller_list[0], "memory");
ASSERT_STREQ(cgroup_list[0], "user/johndoe/0");
ASSERT_STREQ(controller_list[1], "perf_event");
ASSERT_STREQ(cgroup_list[1], "/");
ASSERT_STREQ(controller_list[2], "rdma");
ASSERT_STREQ(cgroup_list[2], "/");
ASSERT_STREQ(controller_list[3], "blkio");
ASSERT_STREQ(cgroup_list[3], "user.slice");
ASSERT_STREQ(controller_list[4], "cpu,cpuacct");
ASSERT_STREQ(cgroup_list[4], "myCgroup");
ASSERT_STREQ(controller_list[5], "freezer");
ASSERT_STREQ(cgroup_list[5], "user/johndoe/0");
ASSERT_STREQ(controller_list[6], "net_cls,net_prio");
ASSERT_STREQ(cgroup_list[6], "/");
ASSERT_STREQ(controller_list[7], "pids");
ASSERT_STREQ(cgroup_list[7], "user.slice/user-1000.slice/session-1.scope");
ASSERT_STREQ(controller_list[8], "devices");
ASSERT_STREQ(cgroup_list[8], "user.slice");
ASSERT_STREQ(controller_list[9], "cpuset");
ASSERT_STREQ(cgroup_list[9], "/");
ASSERT_STREQ(controller_list[10], "hugetlb");
ASSERT_STREQ(cgroup_list[10], "/");
ASSERT_STREQ(controller_list[11], "name=systemd");
ASSERT_STREQ(cgroup_list[11], "user.slice/user-1000.slice/session-1.scope");
ASSERT_EQ(controller_list[12], nullptr);
ASSERT_EQ(cgroup_list[12], nullptr);
}
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