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feat 支持容器限额

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BREAKING CHANGE:
支持容器限额对外变更:
1.在proc目录下增加sys/user目录，支持max_容器_container 配额文件

Close #I6HDQK

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: Ieaac046182f679a6f49cbdc74593ab39fcb31f5f
This commit is contained in:
zhushengle
2023-02-23 20:09:42 +08:00
parent 10c5e2e666
commit c141a92544
39 changed files with 1691 additions and 351 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
testsuites/unittest/process/fs/config.gni
View File

@@ -51,7 +51,6 @@ process_fs_sources_smoke = [
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_003.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_004.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_005.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_006.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_007.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_008.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_009.cpp",
@@ -61,11 +60,6 @@ process_fs_sources_smoke = [
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_013.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_014.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_015.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_016.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_017.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_018.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_019.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_020.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_021.cpp",
"$TEST_UNITTEST_DIR/process/fs/smoke/It_process_fs_022.cpp",
]

7
testsuites/unittest/process/fs/smoke/It_process_fs_002.cpp
View File

@@ -41,12 +41,9 @@ void ItProcessFs002(void)
ASSERT_NE(fp, nullptr);
int ret = fread(szStatBuf, 1, LEN_BUFF, fp);
PrintTest("cat /proc/meminfo\n");
PrintTest("%s\n", szStatBuf);
ASSERT_EQ(ret, strlen(szStatBuf));
(void)fclose(fp);
ASSERT_NE(ret, -1);
char *res = strstr(szStatBuf, "UsedSize");
ASSERT_NE(res, nullptr);
(void)fclose(fp);
}

124
testsuites/unittest/process/fs/smoke/It_process_fs_006.cpp
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@@ -1,124 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const maxContainerNum = 5;
static int const configLen = 16;
static int nInitArry[maxContainerNum] = {61, 54, 49, 44, 41};
static std::string arryEntries[maxContainerNum] = {
"max_mnt_container",
"max_pid_container",
"max_user_container",
"max_net_container",
"max_uts_container"
};
static void WriteContainer(const char *filepath, int value)
{
PrintTest("writeproc %d >> %s\n", value, filepath);
int fd = open(filepath, O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
size_t twd = sprintf_s(buf, configLen, "%d", value);
ASSERT_GT(twd, 0);
twd = write(fd, buf, (strlen(buf)+1));
ASSERT_EQ(twd, -1);
(void)close(fd);
}
static void ReadContainer(std::string strFile, int value)
{
char szStatBuf[configLen];
FILE *fp = fopen(strFile.c_str(), "rb");
ASSERT_NE(fp, nullptr);
int ret;
(void)memset_s(szStatBuf, configLen, 0, configLen);
ret = fread(szStatBuf, 1, configLen, fp);
ASSERT_NE(ret, 0);
PrintTest("cat %s\n", strFile.c_str());
PrintTest("%s\n", szStatBuf);
ret = atoi(szStatBuf);
ASSERT_EQ(ret, value);
(void)fclose(fp);
}
static void ErrWriteContainer0(const char *filepath)
{
int fd = open(filepath, O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
int invalidNum = 0;
size_t twd1 = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(twd1, 0);
PrintTest("writeproc %d >> %s\n", invalidNum, filepath);
twd1 = write(fd, buf, (strlen(buf)+1));
(void)close(fd);
ASSERT_EQ(twd1, -1);
}
static void ErrWriteContainer65(const char *filepath)
{
int fd = open(filepath, O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
int invalidNum = 65;
size_t twd2 = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(twd2, 0);
PrintTest("writeproc %d >> %s\n", invalidNum, filepath);
twd2 = write(fd, buf, (strlen(buf)+1));
(void)close(fd);
ASSERT_EQ(twd2, -1);
}
void ItProcessFs006(void)
{
const int CONFIG_FILE_LEN = 1024;
char szFile[CONFIG_FILE_LEN] = {0};
for (int i = 0; i < maxContainerNum; i++) {
size_t count = sprintf_s(szFile, CONFIG_FILE_LEN, "/proc/sys/user/%s", arryEntries[i].c_str());
ASSERT_GT(count, 0);
WriteContainer(szFile, nInitArry[i]);
ReadContainer(szFile, nInitArry[i]);
}
for (int i = 0; i < maxContainerNum; i++) {
size_t count = sprintf_s(szFile, CONFIG_FILE_LEN, "/proc/sys/user/%s", arryEntries[i].c_str());
ASSERT_GT(count, 0);
ErrWriteContainer0(szFile);
ErrWriteContainer65(szFile);
}
}

74
testsuites/unittest/process/fs/smoke/It_process_fs_016.cpp
View File

@@ -1,74 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const configLen = 16;
static int const invalidNum = 2;
static const int CHILD_FUNC_ARG = 0x2088;
const int STACK_SIZE = (1024 * 1024);
static int childFunc(void *arg)
{
(void)arg;
sleep(2); /* 2: delay 2s */
return 0;
}
void ItProcessFs016(void)
{
std::string path = "/proc/sys/user/max_uts_container";
int fd = open(path.c_str(), O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
(void)sprintf(buf, "%d", invalidNum);
size_t ret = write(fd, buf, (strlen(buf) + 1));
ASSERT_NE(ret, -1);
int arg = CHILD_FUNC_ARG;
char *stack = (char *)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
ASSERT_NE(stack, nullptr);
char *stackTop = stack + STACK_SIZE;
auto pid = clone(childFunc, stackTop, CLONE_NEWUTS, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWUTS, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWUTS, &arg);
ASSERT_EQ(pid, -1);
(void)close(fd);
}

75
testsuites/unittest/process/fs/smoke/It_process_fs_017.cpp
View File

@@ -1,75 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const configLen = 16;
static int const invalidNum = 2;
static const int CHILD_FUNC_ARG = 0x2088;
const int STACK_SIZE = (1024 * 1024);
static int childFunc(void *arg)
{
(void)arg;
sleep(2); /* 2: delay 2s */
return 0;
}
void ItProcessFs017(void)
{
std::string path = "/proc/sys/user/max_user_container";
int fd = open(path.c_str(), O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
size_t ret = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(ret, 0);
ret = write(fd, buf, (strlen(buf) + 1));
ASSERT_NE(ret, -1);
int arg = CHILD_FUNC_ARG;
char *stack = (char *)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
ASSERT_NE(stack, nullptr);
char *stackTop = stack + STACK_SIZE;
auto pid = clone(childFunc, stackTop, CLONE_NEWUSER, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWUSER, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWUSER, &arg);
ASSERT_EQ(pid, -1);
(void)close(fd);
}

75
testsuites/unittest/process/fs/smoke/It_process_fs_018.cpp
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@@ -1,75 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const configLen = 16;
static int const invalidNum = 2;
static const int CHILD_FUNC_ARG = 0x2088;
const int STACK_SIZE = (1024 * 1024);
static int childFunc(void *arg)
{
(void)arg;
sleep(2); /* 2: delay 2s */
return 0;
}
void ItProcessFs018(void)
{
std::string path = "/proc/sys/user/max_mnt_container";
int fd = open(path.c_str(), O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
size_t ret = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(ret, 0);
ret = write(fd, buf, (strlen(buf) + 1));
ASSERT_NE(ret, -1);
int arg = CHILD_FUNC_ARG;
char *stack = (char *)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
ASSERT_NE(stack, nullptr);
char *stackTop = stack + STACK_SIZE;
auto pid = clone(childFunc, stackTop, CLONE_NEWNS, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWNS, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWNS, &arg);
ASSERT_EQ(pid, -1);
(void)close(fd);
}

75
testsuites/unittest/process/fs/smoke/It_process_fs_019.cpp
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@@ -1,75 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const configLen = 16;
static int const invalidNum = 2;
static const int CHILD_FUNC_ARG = 0x2088;
const int STACK_SIZE = (1024 * 1024);
static int childFunc(void *arg)
{
(void)arg;
sleep(2); /* 2: delay 2s */
return 0;
}
void ItProcessFs019(void)
{
std::string path = "/proc/sys/user/max_pid_container";
int fd = open(path.c_str(), O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
size_t ret = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(ret, 0);
ret = write(fd, buf, (strlen(buf) + 1));
ASSERT_NE(ret, -1);
int arg = CHILD_FUNC_ARG;
char *stack = (char *)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
ASSERT_NE(stack, nullptr);
char *stackTop = stack + STACK_SIZE;
auto pid = clone(childFunc, stackTop, CLONE_NEWPID, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWPID, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWPID, &arg);
ASSERT_EQ(pid, -1);
(void)close(fd);
}

75
testsuites/unittest/process/fs/smoke/It_process_fs_020.cpp
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@@ -1,75 +0,0 @@
/*
* Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cstdio>
#include "It_process_fs_test.h"
static int const configLen = 16;
static int const invalidNum = 2;
static const int CHILD_FUNC_ARG = 0x2088;
const int STACK_SIZE = (1024 * 1024);
static int childFunc(void *arg)
{
(void)arg;
sleep(2); /* 2: delay 2s */
return 0;
}
void ItProcessFs020(void)
{
std::string path = "/proc/sys/user/max_net_container";
int fd = open(path.c_str(), O_WRONLY);
ASSERT_NE(fd, -1);
char buf[configLen];
size_t ret = sprintf_s(buf, configLen, "%d", invalidNum);
ASSERT_GT(ret, 0);
ret = write(fd, buf, (strlen(buf) + 1));
ASSERT_NE(ret, -1);
int arg = CHILD_FUNC_ARG;
char *stack = (char *)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
ASSERT_NE(stack, nullptr);
char *stackTop = stack + STACK_SIZE;
auto pid = clone(childFunc, stackTop, CLONE_NEWNET, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWNET, &arg);
ASSERT_NE(pid, -1);
pid = clone(childFunc, stackTop, CLONE_NEWNET, &arg);
ASSERT_EQ(pid, -1);
(void)close(fd);
}