tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
23static inline int values_close(long a, long b, int err)
24{
25 return labs(a - b) <= (a + b) / 100 * err;
26}
27
28extern ssize_t read_text(const char *path, char *buf, size_t max_len);
29extern ssize_t write_text(const char *path, char *buf, ssize_t len);
30
31extern int cg_find_controller_root(char *root, size_t len, const char *controller);
32extern int cg_find_unified_root(char *root, size_t len, bool *nsdelegate);
33extern char *cg_name(const char *root, const char *name);
34extern char *cg_name_indexed(const char *root, const char *name, int index);
35extern char *cg_control(const char *cgroup, const char *control);
36extern int cg_create(const char *cgroup);
37extern int cg_destroy(const char *cgroup);
38extern int cg_read(const char *cgroup, const char *control,
39 char *buf, size_t len);
40extern int cg_read_strcmp(const char *cgroup, const char *control,
41 const char *expected);
42extern int cg_read_strstr(const char *cgroup, const char *control,
43 const char *needle);
44extern long cg_read_long(const char *cgroup, const char *control);
45extern long cg_read_long_fd(int fd);
46long cg_read_key_long(const char *cgroup, const char *control, const char *key);
47extern long cg_read_lc(const char *cgroup, const char *control);
48extern int cg_write(const char *cgroup, const char *control, char *buf);
49extern int cg_open(const char *cgroup, const char *control, int flags);
50int cg_write_numeric(const char *cgroup, const char *control, long value);
51extern int cg_run(const char *cgroup,
52 int (*fn)(const char *cgroup, void *arg),
53 void *arg);
54extern int cg_enter(const char *cgroup, int pid);
55extern int cg_enter_current(const char *cgroup);
56extern int cg_enter_current_thread(const char *cgroup);
57extern int cg_run_nowait(const char *cgroup,
58 int (*fn)(const char *cgroup, void *arg),
59 void *arg);
60extern int cg_wait_for_proc_count(const char *cgroup, int count);
61extern int cg_killall(const char *cgroup);
62int proc_mount_contains(const char *option);
63extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size);
64extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle);
65extern pid_t clone_into_cgroup(int cgroup_fd);
66extern int clone_reap(pid_t pid, int options);
67extern int clone_into_cgroup_run_wait(const char *cgroup);
68extern int dirfd_open_opath(const char *dir);
69extern int cg_prepare_for_wait(const char *cgroup);
70extern int memcg_prepare_for_wait(const char *cgroup);
71extern int cg_wait_for(int fd);
72extern bool cg_test_v1_named;