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 /*
12  * Checks if two given values differ by less than err% of their sum.
13  */
14 static inline int values_close(long a, long b, int err)
15 {
16 	return abs(a - b) <= (a + b) / 100 * err;
17 }
18 
19 extern int cg_find_unified_root(char *root, size_t len);
20 extern char *cg_name(const char *root, const char *name);
21 extern char *cg_name_indexed(const char *root, const char *name, int index);
22 extern char *cg_control(const char *cgroup, const char *control);
23 extern int cg_create(const char *cgroup);
24 extern int cg_destroy(const char *cgroup);
25 extern int cg_read(const char *cgroup, const char *control,
26 		   char *buf, size_t len);
27 extern int cg_read_strcmp(const char *cgroup, const char *control,
28 			  const char *expected);
29 extern int cg_read_strstr(const char *cgroup, const char *control,
30 			  const char *needle);
31 extern long cg_read_long(const char *cgroup, const char *control);
32 long cg_read_key_long(const char *cgroup, const char *control, const char *key);
33 extern long cg_read_lc(const char *cgroup, const char *control);
34 extern int cg_write(const char *cgroup, const char *control, char *buf);
35 extern int cg_run(const char *cgroup,
36 		  int (*fn)(const char *cgroup, void *arg),
37 		  void *arg);
38 extern int cg_enter(const char *cgroup, int pid);
39 extern int cg_enter_current(const char *cgroup);
40 extern int cg_enter_current_thread(const char *cgroup);
41 extern int cg_run_nowait(const char *cgroup,
42 			 int (*fn)(const char *cgroup, void *arg),
43 			 void *arg);
44 extern int get_temp_fd(void);
45 extern int alloc_pagecache(int fd, size_t size);
46 extern int alloc_anon(const char *cgroup, void *arg);
47 extern int is_swap_enabled(void);
48 extern int set_oom_adj_score(int pid, int score);
49 extern int cg_wait_for_proc_count(const char *cgroup, int count);
50 extern int cg_killall(const char *cgroup);
51 extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size);
52 extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle);
53 extern pid_t clone_into_cgroup(int cgroup_fd);
54 extern int clone_reap(pid_t pid, int options);
55 extern int clone_into_cgroup_run_wait(const char *cgroup);
56 extern int dirfd_open_opath(const char *dir);
57 extern int cg_prepare_for_wait(const char *cgroup);
58 extern int memcg_prepare_for_wait(const char *cgroup);
59 extern int cg_wait_for(int fd);
60