1/* SPDX-License-Identifier: GPL-2.0 */
2#include <stdbool.h>
3#include <stdlib.h>
4
5#include "../kselftest.h"
6
7#define PAGE_SIZE 4096
8
9#define MB(x) (x << 20)
10
11#define USEC_PER_SEC	1000000L
12#define NSEC_PER_SEC	1000000000L
13
14#define TEST_UID	65534 /* usually nobody, any !root is fine */
15
16/*
17 * Checks if two given values differ by less than err% of their sum.
18 */
19static inline int values_close(long a, long b, int err)
20{
21	return abs(a - b) <= (a + b) / 100 * err;
22}
23
24extern int cg_find_unified_root(char *root, size_t len);
25extern char *cg_name(const char *root, const char *name);
26extern char *cg_name_indexed(const char *root, const char *name, int index);
27extern char *cg_control(const char *cgroup, const char *control);
28extern int cg_create(const char *cgroup);
29extern int cg_destroy(const char *cgroup);
30extern int cg_read(const char *cgroup, const char *control,
31		   char *buf, size_t len);
32extern int cg_read_strcmp(const char *cgroup, const char *control,
33			  const char *expected);
34extern int cg_read_strstr(const char *cgroup, const char *control,
35			  const char *needle);
36extern long cg_read_long(const char *cgroup, const char *control);
37long cg_read_key_long(const char *cgroup, const char *control, const char *key);
38extern long cg_read_lc(const char *cgroup, const char *control);
39extern int cg_write(const char *cgroup, const char *control, char *buf);
40int cg_write_numeric(const char *cgroup, const char *control, long value);
41extern int cg_run(const char *cgroup,
42		  int (*fn)(const char *cgroup, void *arg),
43		  void *arg);
44extern int cg_enter(const char *cgroup, int pid);
45extern int cg_enter_current(const char *cgroup);
46extern int cg_enter_current_thread(const char *cgroup);
47extern int cg_run_nowait(const char *cgroup,
48			 int (*fn)(const char *cgroup, void *arg),
49			 void *arg);
50extern int get_temp_fd(void);
51extern int alloc_pagecache(int fd, size_t size);
52extern int alloc_anon(const char *cgroup, void *arg);
53extern int is_swap_enabled(void);
54extern int set_oom_adj_score(int pid, int score);
55extern int cg_wait_for_proc_count(const char *cgroup, int count);
56extern int cg_killall(const char *cgroup);
57int proc_mount_contains(const char *option);
58extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size);
59extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle);
60extern pid_t clone_into_cgroup(int cgroup_fd);
61extern int clone_reap(pid_t pid, int options);
62extern int clone_into_cgroup_run_wait(const char *cgroup);
63extern int dirfd_open_opath(const char *dir);
64extern int cg_prepare_for_wait(const char *cgroup);
65extern int memcg_prepare_for_wait(const char *cgroup);
66extern int cg_wait_for(int fd);
67