1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <stdbool.h>
 3#include <stdlib.h>
 4
 5#define PAGE_SIZE 4096
 6
 7#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 8
 9#define MB(x) (x << 20)
10
11/*
12 * Checks if two given values differ by less than err% of their sum.
13 */
14static inline int values_close(long a, long b, int err)
15{
16	return abs(a - b) <= (a + b) / 100 * err;
17}
18
19extern int cg_find_unified_root(char *root, size_t len);
20extern char *cg_name(const char *root, const char *name);
21extern char *cg_name_indexed(const char *root, const char *name, int index);
22extern char *cg_control(const char *cgroup, const char *control);
23extern int cg_create(const char *cgroup);
24extern int cg_destroy(const char *cgroup);
25extern int cg_read(const char *cgroup, const char *control,
26		   char *buf, size_t len);
27extern int cg_read_strcmp(const char *cgroup, const char *control,
28			  const char *expected);
29extern int cg_read_strstr(const char *cgroup, const char *control,
30			  const char *needle);
31extern long cg_read_long(const char *cgroup, const char *control);
32long cg_read_key_long(const char *cgroup, const char *control, const char *key);
33extern long cg_read_lc(const char *cgroup, const char *control);
34extern int cg_write(const char *cgroup, const char *control, char *buf);
35extern int cg_run(const char *cgroup,
36		  int (*fn)(const char *cgroup, void *arg),
37		  void *arg);
38extern int cg_enter(const char *cgroup, int pid);
39extern int cg_enter_current(const char *cgroup);
40extern int cg_enter_current_thread(const char *cgroup);
41extern int cg_run_nowait(const char *cgroup,
42			 int (*fn)(const char *cgroup, void *arg),
43			 void *arg);
44extern int get_temp_fd(void);
45extern int alloc_pagecache(int fd, size_t size);
46extern int alloc_anon(const char *cgroup, void *arg);
47extern int is_swap_enabled(void);
48extern int set_oom_adj_score(int pid, int score);
49extern int cg_wait_for_proc_count(const char *cgroup, int count);
50extern int cg_killall(const char *cgroup);
51extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size);
52extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle);
53extern pid_t clone_into_cgroup(int cgroup_fd);
54extern int clone_reap(pid_t pid, int options);
55extern int clone_into_cgroup_run_wait(const char *cgroup);
56extern int dirfd_open_opath(const char *dir);