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/*
* @copyright Copyright (c) 2016-2020 TOYOTA MOTOR CORPORATION.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "cl_cgroup.h"
#define CL_CGROOT "/sys/fs/cgroup/"
static char *cl_cgroup_base(cl_cgroup_t cgroup) {
switch (cgroup) { // LCOV_EXCL_BR_LINE 200: internal interface,code make sure
case CL_CGROUP_MEMORY:
return CL_CGROOT "/memory";
case CL_CGROUP_CPU:
return CL_CGROOT "/cpu";
}
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
return NULL;// LCOV_EXCL_LINE 200:internal interface,code make sure nerver run
}
static char *cl_cgroup_create_path(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler) {
char *path = malloc(FILENAME_MAX);
if (path == NULL) { // LCOV_EXCL_BR_LINE 5:fail safe for libc malloc
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
errno = ENOMEM; // LCOV_EXCL_LINE 5:fail safe for libc malloc
goto error; // LCOV_EXCL_LINE 5:fail safe for libc malloc
}
if (cgroup != CL_CGROUP_MEMORY && cgroup != CL_CGROUP_CPU) { // LCOV_EXCL_BR_LINE 200: internal interface,code make sure
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
errno = EINVAL; // LCOV_EXCL_LINE 200: internal interface,code make sure
goto error; // LCOV_EXCL_LINE 200: internal interface,code make sure
}
if (cgroup_name == NULL) { // LCOV_EXCL_BR_LINE 200: internal interface,code make sure
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
errno = EINVAL; // LCOV_EXCL_LINE 200: internal interface,code make sure
goto error; // LCOV_EXCL_LINE 200: internal interface,code make sure
}
if (controler) {
snprintf(path, FILENAME_MAX, "%s/%s/%s", cl_cgroup_base(cgroup), cgroup_name, controler);
} else {
snprintf(path, FILENAME_MAX, "%s/%s", cl_cgroup_base(cgroup), cgroup_name);
}
return path;
error:
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
free(path); // LCOV_EXCL_LINE 200: internal interface,code make sure
return NULL; // LCOV_EXCL_LINE 200: internal interface,code make sure
}
int cl_cgroup_make(cl_cgroup_t cgroup, const char *cgroup_name) {
int r = -1;
char *path = cl_cgroup_create_path(cgroup, cgroup_name, NULL);
if (path == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
goto exit; // LCOV_EXCL_LINE 6: double check
}
if (mkdir(path, 0777) < 0) { // LCOV_EXCL_BR_LINE 5:fail safe for libc mkdir
goto exit;
}
r = 0;
exit:
if (path) {// LCOV_EXCL_BR_LINE 6: double check
free(path);
}
return r;
}
int cl_cgroup_remove(cl_cgroup_t cgroup, const char *cgroup_name) {
int r = -1;
char *path = cl_cgroup_create_path(cgroup, cgroup_name, NULL);
if (path == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
goto exit; // LCOV_EXCL_LINE 6: double check
}
if (rmdir(path) < 0) { // LCOV_EXCL_BR_LINE 5:fail safe for libc rmdir
goto exit;
}
r = 0;
exit:
if (path) { // LCOV_EXCL_BR_LINE 6: double check
free(path);
}
return r;
}
int cl_cgroup_exist(cl_cgroup_t cgroup, const char *cgroup_name) {
int r = -1;
char *path = cl_cgroup_create_path(cgroup, cgroup_name, NULL);
if (path == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
goto exit; // LCOV_EXCL_LINE 6: double check
}
r = access(path, F_OK);
exit:
if (path) { // LCOV_EXCL_BR_LINE 6: double check
free(path);
}
return r;
}
int cl_cgroup_open(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler, int flags) {
int r = -1;
char *path = cl_cgroup_create_path(cgroup, cgroup_name, controler);
int fd = -1;
if (path == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
goto exit; // LCOV_EXCL_LINE 6: double check
}
if (controler == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
errno = EINVAL; // LCOV_EXCL_LINE 6: double check
goto exit; // LCOV_EXCL_LINE 6: double check
}
if ((fd = open(path, flags | O_CLOEXEC)) < 0) { // LCOV_EXCL_BR_LINE 5:fail safe for libc open
goto exit;
}
r = fd;
exit:
if (path) { // LCOV_EXCL_BR_LINE 6: double check
free(path);
}
return r;
}
int cl_cgroup_set_string(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler, const char *string) {
int r = -1;
int fd = -1;
if (controler == NULL || string == NULL) { // LCOV_EXCL_BR_LINE 6: double check
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
errno = EINVAL;// LCOV_EXCL_LINE 6: double check
goto exit;// LCOV_EXCL_LINE 6: double check
}
fd = cl_cgroup_open(cgroup, cgroup_name, controler, O_WRONLY);
if (fd < 0) { // LCOV_EXCL_BR_LINE 5: fail safe for glibc funtion open
goto exit;
}
if (write(fd, string, strlen(string)) < 0) { // LCOV_EXCL_BR_LINE 5:fail safe for libc write
goto exit;
}
r = 0;
exit:
if (fd >= 0) { // LCOV_EXCL_BR_LINE 5: fail safe for glibc funtion open
int save_err = errno;
close(fd);
errno = save_err;
}
return r;
}
int cl_cgroup_set_num(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler, int64_t value) {
char num_str[22];
snprintf(num_str, sizeof(num_str), "%" PRId64, value);
return cl_cgroup_set_string(cgroup, cgroup_name, controler, num_str);
}
int cl_cgroup_get_string(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler, char *string, size_t length) { // LCOV_EXCL_START 8: dead code // NOLINT (readability/nolint)
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
int r = -1;
int fd = -1;
if (controler == NULL || string == NULL) {
errno = EINVAL;
goto exit;
}
fd = cl_cgroup_open(cgroup, cgroup_name, controler, O_RDONLY);
if (fd < 0) {
goto exit;
}
if (read(fd, string, length) < 0) {
goto exit;
}
r = 0;
exit:
if (fd >= 0) {
int save_err = errno;
close(fd);
errno = save_err;
}
return r;
}
// LCOV_EXCL_STOP
int64_t cl_cgroup_get_num(cl_cgroup_t cgroup, const char *cgroup_name, const char *controler) { // LCOV_EXCL_START 8: dead code // NOLINT (readability/nolint)
AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert
int r;
char num_str[22];
if ((r = cl_cgroup_get_string(cgroup, cgroup_name, controler, num_str, sizeof(num_str))) < 0) {
return r;
}
return atoll(num_str);
}
// LCOV_EXCL_STOP
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