1  /* SPDX-License-Identifier: GPL-2.0 */
2  #ifndef __CGROUP_HELPERS_H
3  #define __CGROUP_HELPERS_H
4  
5  #include <errno.h>
6  #include <string.h>
7  
8  #define clean_errno() (errno == 0 ? "None" : strerror(errno))
9  #define log_err(MSG, ...) fprintf(stderr, "(%s:%d: errno: %s) " MSG "\n", \
10  	__FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
11  
12  /* cgroupv2 related */
13  int enable_controllers(const char *relative_path, const char *controllers);
14  int write_cgroup_file(const char *relative_path, const char *file,
15  		      const char *buf);
16  int write_cgroup_file_parent(const char *relative_path, const char *file,
17  			     const char *buf);
18  int cgroup_setup_and_join(const char *relative_path);
19  int get_root_cgroup(void);
20  int create_and_get_cgroup(const char *relative_path);
21  void remove_cgroup(const char *relative_path);
22  unsigned long long get_cgroup_id(const char *relative_path);
23  int get_cgroup1_hierarchy_id(const char *subsys_name);
24  
25  int join_cgroup(const char *relative_path);
26  int join_root_cgroup(void);
27  int join_parent_cgroup(const char *relative_path);
28  
29  int setup_cgroup_environment(void);
30  void cleanup_cgroup_environment(void);
31  
32  /* cgroupv1 related */
33  int set_classid(void);
34  int join_classid(void);
35  unsigned long long get_classid_cgroup_id(void);
36  int open_classid(void);
37  
38  int setup_classid_environment(void);
39  void cleanup_classid_environment(void);
40  
41  #endif /* __CGROUP_HELPERS_H */
42