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 */
values_close(long a,long b,int err)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 */
values_close_report(long a,long b,int err)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