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 /* 15 * Checks if two given values differ by less than err% of their sum. 16 */ 17 static inline int values_close(long a, long b, int err) 18 { 19 return abs(a - b) <= (a + b) / 100 * err; 20 } 21 22 extern int cg_find_unified_root(char *root, size_t len); 23 extern char *cg_name(const char *root, const char *name); 24 extern char *cg_name_indexed(const char *root, const char *name, int index); 25 extern char *cg_control(const char *cgroup, const char *control); 26 extern int cg_create(const char *cgroup); 27 extern int cg_destroy(const char *cgroup); 28 extern int cg_read(const char *cgroup, const char *control, 29 char *buf, size_t len); 30 extern int cg_read_strcmp(const char *cgroup, const char *control, 31 const char *expected); 32 extern int cg_read_strstr(const char *cgroup, const char *control, 33 const char *needle); 34 extern long cg_read_long(const char *cgroup, const char *control); 35 long cg_read_key_long(const char *cgroup, const char *control, const char *key); 36 extern long cg_read_lc(const char *cgroup, const char *control); 37 extern int cg_write(const char *cgroup, const char *control, char *buf); 38 int cg_write_numeric(const char *cgroup, const char *control, long value); 39 extern int cg_run(const char *cgroup, 40 int (*fn)(const char *cgroup, void *arg), 41 void *arg); 42 extern int cg_enter(const char *cgroup, int pid); 43 extern int cg_enter_current(const char *cgroup); 44 extern int cg_enter_current_thread(const char *cgroup); 45 extern int cg_run_nowait(const char *cgroup, 46 int (*fn)(const char *cgroup, void *arg), 47 void *arg); 48 extern int get_temp_fd(void); 49 extern int alloc_pagecache(int fd, size_t size); 50 extern int alloc_anon(const char *cgroup, void *arg); 51 extern int is_swap_enabled(void); 52 extern int set_oom_adj_score(int pid, int score); 53 extern int cg_wait_for_proc_count(const char *cgroup, int count); 54 extern int cg_killall(const char *cgroup); 55 int proc_mount_contains(const char *option); 56 extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); 57 extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); 58 extern pid_t clone_into_cgroup(int cgroup_fd); 59 extern int clone_reap(pid_t pid, int options); 60 extern int clone_into_cgroup_run_wait(const char *cgroup); 61 extern int dirfd_open_opath(const char *dir); 62 extern int cg_prepare_for_wait(const char *cgroup); 63 extern int memcg_prepare_for_wait(const char *cgroup); 64 extern int cg_wait_for(int fd); 65