LXR linux/tools/testing/selftests/cgroup/cgroup

   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);
  57extern int cg_prepare_for_wait(const char *cgroup);
  58extern int cg_wait_for(int fd);
  59