1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
14 #include <sys/statfs.h>
15 #include <sys/types.h>
18 //#include "hashmap.h"
22 #if 0 /// elogind has them set through config.h
23 #define SYSTEMD_CGROUP_CONTROLLER_LEGACY "name=systemd"
24 #define SYSTEMD_CGROUP_CONTROLLER_HYBRID "name=unified"
25 #define SYSTEMD_CGROUP_CONTROLLER "_systemd"
28 /* An enum of well known cgroup controllers */
29 typedef enum CGroupController {
30 CGROUP_CONTROLLER_CPU,
31 CGROUP_CONTROLLER_CPUACCT, /* v1 only */
32 CGROUP_CONTROLLER_IO, /* v2 only */
33 CGROUP_CONTROLLER_BLKIO, /* v1 only */
34 CGROUP_CONTROLLER_MEMORY,
35 CGROUP_CONTROLLER_DEVICES, /* v1 only */
36 CGROUP_CONTROLLER_PIDS,
37 _CGROUP_CONTROLLER_MAX,
38 _CGROUP_CONTROLLER_INVALID = -1,
41 #define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c))
43 /* A bit mask of well known cgroup controllers */
44 typedef enum CGroupMask {
45 CGROUP_MASK_CPU = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPU),
46 CGROUP_MASK_CPUACCT = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPUACCT),
47 CGROUP_MASK_IO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_IO),
48 CGROUP_MASK_BLKIO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BLKIO),
49 CGROUP_MASK_MEMORY = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_MEMORY),
50 CGROUP_MASK_DEVICES = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_DEVICES),
51 CGROUP_MASK_PIDS = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_PIDS),
52 _CGROUP_MASK_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1
55 /* Special values for all weight knobs on unified hierarchy */
56 #define CGROUP_WEIGHT_INVALID ((uint64_t) -1)
57 #define CGROUP_WEIGHT_MIN UINT64_C(1)
58 #define CGROUP_WEIGHT_MAX UINT64_C(10000)
59 #define CGROUP_WEIGHT_DEFAULT UINT64_C(100)
61 #define CGROUP_LIMIT_MIN UINT64_C(0)
62 #define CGROUP_LIMIT_MAX ((uint64_t) -1)
64 #if 0 /// UNNEEDED by elogind
65 static inline bool CGROUP_WEIGHT_IS_OK(uint64_t x) {
67 x == CGROUP_WEIGHT_INVALID ||
68 (x >= CGROUP_WEIGHT_MIN && x <= CGROUP_WEIGHT_MAX);
71 /* IO limits on unified hierarchy */
72 typedef enum CGroupIOLimitType {
78 _CGROUP_IO_LIMIT_TYPE_MAX,
79 _CGROUP_IO_LIMIT_TYPE_INVALID = -1
82 extern const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX];
84 const char* cgroup_io_limit_type_to_string(CGroupIOLimitType t) _const_;
85 CGroupIOLimitType cgroup_io_limit_type_from_string(const char *s) _pure_;
88 /* Special values for the cpu.shares attribute */
89 #define CGROUP_CPU_SHARES_INVALID ((uint64_t) -1)
90 #define CGROUP_CPU_SHARES_MIN UINT64_C(2)
91 #define CGROUP_CPU_SHARES_MAX UINT64_C(262144)
92 #define CGROUP_CPU_SHARES_DEFAULT UINT64_C(1024)
94 #if 0 /// UNNEEDED by elogind
95 static inline bool CGROUP_CPU_SHARES_IS_OK(uint64_t x) {
97 x == CGROUP_CPU_SHARES_INVALID ||
98 (x >= CGROUP_CPU_SHARES_MIN && x <= CGROUP_CPU_SHARES_MAX);
102 /* Special values for the blkio.weight attribute */
103 #define CGROUP_BLKIO_WEIGHT_INVALID ((uint64_t) -1)
104 #define CGROUP_BLKIO_WEIGHT_MIN UINT64_C(10)
105 #define CGROUP_BLKIO_WEIGHT_MAX UINT64_C(1000)
106 #define CGROUP_BLKIO_WEIGHT_DEFAULT UINT64_C(500)
108 #if 0 /// UNNEEDED by elogind
109 static inline bool CGROUP_BLKIO_WEIGHT_IS_OK(uint64_t x) {
111 x == CGROUP_BLKIO_WEIGHT_INVALID ||
112 (x >= CGROUP_BLKIO_WEIGHT_MIN && x <= CGROUP_BLKIO_WEIGHT_MAX);
116 /* Default resource limits */
117 #define DEFAULT_TASKS_MAX_PERCENTAGE 15U /* 15% of PIDs, 4915 on default settings */
118 #define DEFAULT_USER_TASKS_MAX_PERCENTAGE 33U /* 33% of PIDs, 10813 on default settings */
120 typedef enum CGroupUnified {
121 CGROUP_UNIFIED_UNKNOWN = -1,
122 CGROUP_UNIFIED_NONE = 0, /* Both systemd and controllers on legacy */
123 CGROUP_UNIFIED_SYSTEMD = 1, /* Only systemd on unified */
124 CGROUP_UNIFIED_ALL = 2, /* Both systemd and controllers on unified */
130 * We accept named hierarchies in the syntax "foo" and "name=foo".
132 * We expect that named hierarchies do not conflict in name with a
133 * kernel hierarchy, modulo the "name=" prefix.
135 * We always generate "normalized" controller names, i.e. without the
138 * We require absolute cgroup paths. When returning, we will always
139 * generate paths with multiple adjacent / removed.
142 int cg_enumerate_processes(const char *controller, const char *path, FILE **_f);
143 int cg_read_pid(FILE *f, pid_t *_pid);
144 int cg_read_event(const char *controller, const char *path, const char *event,
147 int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
148 int cg_read_subgroup(DIR *d, char **fn);
150 typedef enum CGroupFlags {
152 CGROUP_IGNORE_SELF = 2,
156 typedef void (*cg_kill_log_func_t)(pid_t pid, int sig, void *userdata);
158 int cg_kill(const char *controller, const char *path, int sig, CGroupFlags flags, Set *s, cg_kill_log_func_t kill_log, void *userdata);
159 int cg_kill_recursive(const char *controller, const char *path, int sig, CGroupFlags flags, Set *s, cg_kill_log_func_t kill_log, void *userdata);
161 int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
162 int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
163 int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
165 int cg_split_spec(const char *spec, char **controller, char **path);
166 int cg_mangle_path(const char *path, char **result);
168 int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs);
169 int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs);
171 int cg_pid_get_path(const char *controller, pid_t pid, char **path);
173 int cg_trim(const char *controller, const char *path, bool delete_root);
175 int cg_rmdir(const char *controller, const char *path);
177 int cg_create(const char *controller, const char *path);
178 int cg_attach(const char *controller, const char *path, pid_t pid);
179 int cg_attach_fallback(const char *controller, const char *path, pid_t pid);
180 int cg_create_and_attach(const char *controller, const char *path, pid_t pid);
182 int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value);
183 int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret);
184 #if 0 /// UNNEEDED by elogind
185 int cg_get_keyed_attribute(const char *controller, const char *path, const char *attribute, char **keys, char **values);
187 int cg_set_access(const char *controller, const char *path, uid_t uid, gid_t gid);
189 int cg_set_xattr(const char *controller, const char *path, const char *name, const void *value, size_t size, int flags);
190 int cg_get_xattr(const char *controller, const char *path, const char *name, void *value, size_t size);
192 int cg_install_release_agent(const char *controller, const char *agent);
193 int cg_uninstall_release_agent(const char *controller);
196 int cg_is_empty(const char *controller, const char *path);
197 int cg_is_empty_recursive(const char *controller, const char *path);
199 int cg_get_root_path(char **path);
201 int cg_path_get_session(const char *path, char **session);
202 int cg_path_get_owner_uid(const char *path, uid_t *uid);
203 int cg_path_get_unit(const char *path, char **unit);
204 #if 0 /// UNNEEDED by elogind
205 int cg_path_get_user_unit(const char *path, char **unit);
206 int cg_path_get_machine_name(const char *path, char **machine);
208 int cg_path_get_slice(const char *path, char **slice);
209 int cg_path_get_user_slice(const char *path, char **slice);
211 int cg_shift_path(const char *cgroup, const char *cached_root, const char **shifted);
212 int cg_pid_get_path_shifted(pid_t pid, const char *cached_root, char **cgroup);
214 int cg_pid_get_session(pid_t pid, char **session);
215 int cg_pid_get_owner_uid(pid_t pid, uid_t *uid);
216 int cg_pid_get_unit(pid_t pid, char **unit);
217 #if 0 /// UNNEEDED by elogind
218 int cg_pid_get_user_unit(pid_t pid, char **unit);
219 int cg_pid_get_machine_name(pid_t pid, char **machine);
221 int cg_pid_get_slice(pid_t pid, char **slice);
222 int cg_pid_get_user_slice(pid_t pid, char **slice);
224 int cg_path_decode_unit(const char *cgroup, char **unit);
226 char *cg_escape(const char *p);
227 char *cg_unescape(const char *p) _pure_;
229 bool cg_controller_is_valid(const char *p);
231 #if 0 /// UNNEEDED by elogind
232 int cg_slice_to_path(const char *unit, char **ret);
234 typedef const char* (*cg_migrate_callback_t)(CGroupMask mask, void *userdata);
236 int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path);
237 int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_migrate_callback_t callback, void *userdata);
238 int cg_attach_many_everywhere(CGroupMask supported, const char *path, Set* pids, cg_migrate_callback_t callback, void *userdata);
239 int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to, cg_migrate_callback_t callback, void *userdata);
240 int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root);
241 int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p);
244 int cg_mask_supported(CGroupMask *ret);
245 int cg_mask_from_string(const char *s, CGroupMask *ret);
246 int cg_mask_to_string(CGroupMask mask, char **ret);
248 #if 0 /// UNNEEDED by elogind
249 int cg_kernel_controllers(Set **controllers);
251 bool cg_ns_supported(void);
254 int cg_all_unified(void);
255 int cg_hybrid_unified(void);
256 int cg_unified_controller(const char *controller);
257 int cg_unified_flush(void);
259 bool cg_is_unified_wanted(void);
260 bool cg_is_legacy_wanted(void);
261 bool cg_is_hybrid_wanted(void);
263 const char* cgroup_controller_to_string(CGroupController c) _const_;
264 CGroupController cgroup_controller_from_string(const char *s) _pure_;
266 #if 0 /// UNNEEDED by elogind
267 int cg_weight_parse(const char *s, uint64_t *ret);
268 int cg_cpu_shares_parse(const char *s, uint64_t *ret);
269 int cg_blkio_weight_parse(const char *s, uint64_t *ret);
272 bool is_cgroup_fs(const struct statfs *s);
273 bool fd_is_cgroup_fs(int fd);