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 */ values_close(long a,long b,int err)19 static inline int values_close(long a, long b, int err) 20 { 21 return labs(a - b) <= (a + b) / 100 * err; 22 } 23 24 extern int cg_find_unified_root(char *root, size_t len, bool *nsdelegate); 25 extern char *cg_name(const char *root, const char *name); 26 extern char *cg_name_indexed(const char *root, const char *name, int index); 27 extern char *cg_control(const char *cgroup, const char *control); 28 extern int cg_create(const char *cgroup); 29 extern int cg_destroy(const char *cgroup); 30 extern int cg_read(const char *cgroup, const char *control, 31 char *buf, size_t len); 32 extern int cg_read_strcmp(const char *cgroup, const char *control, 33 const char *expected); 34 extern int cg_read_strstr(const char *cgroup, const char *control, 35 const char *needle); 36 extern long cg_read_long(const char *cgroup, const char *control); 37 extern long cg_read_long_fd(int fd); 38 long cg_read_key_long(const char *cgroup, const char *control, const char *key); 39 extern long cg_read_lc(const char *cgroup, const char *control); 40 extern int cg_write(const char *cgroup, const char *control, char *buf); 41 extern int cg_open(const char *cgroup, const char *control, int flags); 42 int cg_write_numeric(const char *cgroup, const char *control, long value); 43 extern int cg_run(const char *cgroup, 44 int (*fn)(const char *cgroup, void *arg), 45 void *arg); 46 extern int cg_enter(const char *cgroup, int pid); 47 extern int cg_enter_current(const char *cgroup); 48 extern int cg_enter_current_thread(const char *cgroup); 49 extern int cg_run_nowait(const char *cgroup, 50 int (*fn)(const char *cgroup, void *arg), 51 void *arg); 52 extern int get_temp_fd(void); 53 extern int alloc_pagecache(int fd, size_t size); 54 extern int alloc_anon(const char *cgroup, void *arg); 55 extern int is_swap_enabled(void); 56 extern int set_oom_adj_score(int pid, int score); 57 extern int cg_wait_for_proc_count(const char *cgroup, int count); 58 extern int cg_killall(const char *cgroup); 59 int proc_mount_contains(const char *option); 60 extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); 61 extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); 62 extern pid_t clone_into_cgroup(int cgroup_fd); 63 extern int clone_reap(pid_t pid, int options); 64 extern int clone_into_cgroup_run_wait(const char *cgroup); 65 extern int dirfd_open_opath(const char *dir); 66 extern int cg_prepare_for_wait(const char *cgroup); 67 extern int memcg_prepare_for_wait(const char *cgroup); 68 extern int cg_wait_for(int fd); 69