1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #include <stdbool.h> 3 #include <stdlib.h> 4 5 #ifndef PAGE_SIZE 6 #define PAGE_SIZE 4096 7 #endif 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 #define CG_THREADS_FILE (!cg_test_v1_named ? "cgroup.threads" : "tasks") 17 #define CG_NAMED_NAME "selftest" 18 #define CG_PATH_FORMAT (!cg_test_v1_named ? "0::%s" : (":name=" CG_NAMED_NAME ":%s")) 19 20 /* 21 * Checks if two given values differ by less than err% of their sum. 22 */ 23 static inline int values_close(long a, long b, int err) 24 { 25 return labs(a - b) <= (a + b) / 100 * err; 26 } 27 28 /* 29 * Checks if two given values differ by less than err% of their sum and assert 30 * with detailed debug info if not. 31 */ 32 static inline int values_close_report(long a, long b, int err) 33 { 34 long diff = labs(a - b); 35 long limit = (a + b) / 100 * err; 36 double actual_err = (a + b) ? (100.0 * diff / (a + b)) : 0.0; 37 int close = diff <= limit; 38 39 if (!close) 40 fprintf(stderr, 41 "[FAIL] actual=%ld expected=%ld | diff=%ld | limit=%ld | " 42 "tolerance=%d%% | actual_error=%.2f%%\n", 43 a, b, diff, limit, err, actual_err); 44 45 return close; 46 } 47 48 extern ssize_t read_text(const char *path, char *buf, size_t max_len); 49 extern ssize_t write_text(const char *path, char *buf, ssize_t len); 50 51 extern int cg_find_controller_root(char *root, size_t len, const char *controller); 52 extern int cg_find_unified_root(char *root, size_t len, bool *nsdelegate); 53 extern char *cg_name(const char *root, const char *name); 54 extern char *cg_name_indexed(const char *root, const char *name, int index); 55 extern char *cg_control(const char *cgroup, const char *control); 56 extern int cg_create(const char *cgroup); 57 extern int cg_destroy(const char *cgroup); 58 extern int cg_read(const char *cgroup, const char *control, 59 char *buf, size_t len); 60 extern int cg_read_strcmp(const char *cgroup, const char *control, 61 const char *expected); 62 extern int cg_read_strstr(const char *cgroup, const char *control, 63 const char *needle); 64 extern long cg_read_long(const char *cgroup, const char *control); 65 extern long cg_read_long_fd(int fd); 66 long cg_read_key_long(const char *cgroup, const char *control, const char *key); 67 extern long cg_read_lc(const char *cgroup, const char *control); 68 extern int cg_write(const char *cgroup, const char *control, char *buf); 69 extern int cg_open(const char *cgroup, const char *control, int flags); 70 int cg_write_numeric(const char *cgroup, const char *control, long value); 71 extern int cg_run(const char *cgroup, 72 int (*fn)(const char *cgroup, void *arg), 73 void *arg); 74 extern int cg_enter(const char *cgroup, int pid); 75 extern int cg_enter_current(const char *cgroup); 76 extern int cg_enter_current_thread(const char *cgroup); 77 extern int cg_run_nowait(const char *cgroup, 78 int (*fn)(const char *cgroup, void *arg), 79 void *arg); 80 extern int cg_wait_for_proc_count(const char *cgroup, int count); 81 extern int cg_killall(const char *cgroup); 82 int proc_mount_contains(const char *option); 83 int cgroup_feature(const char *feature); 84 extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size); 85 extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle); 86 extern pid_t clone_into_cgroup(int cgroup_fd); 87 extern int clone_reap(pid_t pid, int options); 88 extern int clone_into_cgroup_run_wait(const char *cgroup); 89 extern int dirfd_open_opath(const char *dir); 90 extern int cg_prepare_for_wait(const char *cgroup); 91 extern int memcg_prepare_for_wait(const char *cgroup); 92 extern int cg_wait_for(int fd); 93 extern bool cg_test_v1_named; 94