tools/testing/selftests/cgroup/cgroup_util.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #include <stdlib.h>
   3
   4 #define PAGE_SIZE 4096
   5
   6 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
   7
   8 #define MB(x) (x << 20)
   9
  10 /*
  11  * Checks if two given values differ by less than err% of their sum.
  12  */
  13 static inline int values_close(long a, long b, int err)
  14 {
  15         return abs(a - b) <= (a + b) / 100 * err;
  16 }
  17
  18 extern int cg_find_unified_root(char *root, size_t len);
  19 extern char *cg_name(const char *root, const char *name);
  20 extern char *cg_name_indexed(const char *root, const char *name, int index);
  21 extern int cg_create(const char *cgroup);
  22 extern int cg_destroy(const char *cgroup);
  23 extern int cg_read(const char *cgroup, const char *control,
  24                    char *buf, size_t len);
  25 extern int cg_read_strcmp(const char *cgroup, const char *control,
  26                           const char *expected);
  27 extern int cg_read_strstr(const char *cgroup, const char *control,
  28                           const char *needle);
  29 extern long cg_read_long(const char *cgroup, const char *control);
  30 long cg_read_key_long(const char *cgroup, const char *control, const char *key);
  31 extern int cg_write(const char *cgroup, const char *control, char *buf);
  32 extern int cg_run(const char *cgroup,
  33                   int (*fn)(const char *cgroup, void *arg),
  34                   void *arg);
  35 extern int cg_enter_current(const char *cgroup);
  36 extern int cg_run_nowait(const char *cgroup,
  37                          int (*fn)(const char *cgroup, void *arg),
  38                          void *arg);
  39 extern int get_temp_fd(void);
  40 extern int alloc_pagecache(int fd, size_t size);
  41 extern int alloc_anon(const char *cgroup, void *arg);
  42 extern int is_swap_enabled(void);