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c2f1db8f | 1 | #pragma once |
8c6db833 LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
8c6db833 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
8c6db833 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
8c6db833 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
35d2e7ec | 22 | #include <dirent.h> |
11c3a366 TA |
23 | #include <stdbool.h> |
24 | #include <stdint.h> | |
71d35b6b TA |
25 | #include <stdio.h> |
26 | #include <sys/types.h> | |
c6c18be3 | 27 | |
f6a6225e | 28 | #include "def.h" |
11c3a366 TA |
29 | #include "hashmap.h" |
30 | #include "macro.h" | |
93cc7779 | 31 | #include "set.h" |
8c6db833 | 32 | |
efdb0237 LP |
33 | /* An enum of well known cgroup controllers */ |
34 | typedef enum CGroupController { | |
35 | CGROUP_CONTROLLER_CPU, | |
36 | CGROUP_CONTROLLER_CPUACCT, | |
13c31542 | 37 | CGROUP_CONTROLLER_IO, |
efdb0237 LP |
38 | CGROUP_CONTROLLER_BLKIO, |
39 | CGROUP_CONTROLLER_MEMORY, | |
3905f127 | 40 | CGROUP_CONTROLLER_DEVICES, |
03a7b521 | 41 | CGROUP_CONTROLLER_PIDS, |
efdb0237 LP |
42 | _CGROUP_CONTROLLER_MAX, |
43 | _CGROUP_CONTROLLER_INVALID = -1, | |
44 | } CGroupController; | |
45 | ||
46 | #define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c)) | |
47 | ||
4ad49000 | 48 | /* A bit mask of well known cgroup controllers */ |
efdb0237 LP |
49 | typedef enum CGroupMask { |
50 | CGROUP_MASK_CPU = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPU), | |
51 | CGROUP_MASK_CPUACCT = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPUACCT), | |
13c31542 | 52 | CGROUP_MASK_IO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_IO), |
efdb0237 LP |
53 | CGROUP_MASK_BLKIO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BLKIO), |
54 | CGROUP_MASK_MEMORY = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_MEMORY), | |
3905f127 | 55 | CGROUP_MASK_DEVICES = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_DEVICES), |
03a7b521 | 56 | CGROUP_MASK_PIDS = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_PIDS), |
efdb0237 LP |
57 | _CGROUP_MASK_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1 |
58 | } CGroupMask; | |
4ad49000 | 59 | |
13c31542 TH |
60 | /* Special values for all weight knobs on unified hierarchy */ |
61 | #define CGROUP_WEIGHT_INVALID ((uint64_t) -1) | |
62 | #define CGROUP_WEIGHT_MIN UINT64_C(1) | |
63 | #define CGROUP_WEIGHT_MAX UINT64_C(10000) | |
64 | #define CGROUP_WEIGHT_DEFAULT UINT64_C(100) | |
65 | ||
66 | #define CGROUP_LIMIT_MIN UINT64_C(0) | |
67 | #define CGROUP_LIMIT_MAX ((uint64_t) -1) | |
68 | ||
69 | static inline bool CGROUP_WEIGHT_IS_OK(uint64_t x) { | |
70 | return | |
71 | x == CGROUP_WEIGHT_INVALID || | |
72 | (x >= CGROUP_WEIGHT_MIN && x <= CGROUP_WEIGHT_MAX); | |
73 | } | |
74 | ||
9be57249 TH |
75 | /* IO limits on unified hierarchy */ |
76 | typedef enum CGroupIOLimitType { | |
77 | CGROUP_IO_RBPS_MAX, | |
78 | CGROUP_IO_WBPS_MAX, | |
ac06a0cf TH |
79 | CGROUP_IO_RIOPS_MAX, |
80 | CGROUP_IO_WIOPS_MAX, | |
9be57249 TH |
81 | |
82 | _CGROUP_IO_LIMIT_TYPE_MAX, | |
83 | _CGROUP_IO_LIMIT_TYPE_INVALID = -1 | |
84 | } CGroupIOLimitType; | |
85 | ||
86 | extern const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX]; | |
87 | ||
88 | const char* cgroup_io_limit_type_to_string(CGroupIOLimitType t) _const_; | |
89 | CGroupIOLimitType cgroup_io_limit_type_from_string(const char *s) _pure_; | |
90 | ||
d53d9474 LP |
91 | /* Special values for the cpu.shares attribute */ |
92 | #define CGROUP_CPU_SHARES_INVALID ((uint64_t) -1) | |
93 | #define CGROUP_CPU_SHARES_MIN UINT64_C(2) | |
94 | #define CGROUP_CPU_SHARES_MAX UINT64_C(262144) | |
95 | #define CGROUP_CPU_SHARES_DEFAULT UINT64_C(1024) | |
96 | ||
97 | static inline bool CGROUP_CPU_SHARES_IS_OK(uint64_t x) { | |
98 | return | |
99 | x == CGROUP_CPU_SHARES_INVALID || | |
100 | (x >= CGROUP_CPU_SHARES_MIN && x <= CGROUP_CPU_SHARES_MAX); | |
101 | } | |
102 | ||
103 | /* Special values for the blkio.weight attribute */ | |
104 | #define CGROUP_BLKIO_WEIGHT_INVALID ((uint64_t) -1) | |
105 | #define CGROUP_BLKIO_WEIGHT_MIN UINT64_C(10) | |
106 | #define CGROUP_BLKIO_WEIGHT_MAX UINT64_C(1000) | |
107 | #define CGROUP_BLKIO_WEIGHT_DEFAULT UINT64_C(500) | |
108 | ||
109 | static inline bool CGROUP_BLKIO_WEIGHT_IS_OK(uint64_t x) { | |
110 | return | |
111 | x == CGROUP_BLKIO_WEIGHT_INVALID || | |
112 | (x >= CGROUP_BLKIO_WEIGHT_MIN && x <= CGROUP_BLKIO_WEIGHT_MAX); | |
113 | } | |
114 | ||
f5058264 TH |
115 | /* Default resource limits */ |
116 | #define DEFAULT_TASKS_MAX_PERCENTAGE 15U /* 15% of PIDs, 4915 on default settings */ | |
117 | #define DEFAULT_USER_TASKS_MAX_PERCENTAGE 33U /* 33% of PIDs, 10813 on default settings */ | |
118 | ||
5da38d07 TH |
119 | typedef enum CGroupUnified { |
120 | CGROUP_UNIFIED_UNKNOWN = -1, | |
121 | CGROUP_UNIFIED_NONE = 0, /* Both systemd and controllers on legacy */ | |
122 | CGROUP_UNIFIED_SYSTEMD = 1, /* Only systemd on unified */ | |
123 | CGROUP_UNIFIED_ALL = 2, /* Both systemd and controllers on unified */ | |
124 | } CGroupUnified; | |
125 | ||
5954c074 LP |
126 | /* |
127 | * General rules: | |
128 | * | |
129 | * We accept named hierarchies in the syntax "foo" and "name=foo". | |
130 | * | |
131 | * We expect that named hierarchies do not conflict in name with a | |
132 | * kernel hierarchy, modulo the "name=" prefix. | |
133 | * | |
134 | * We always generate "normalized" controller names, i.e. without the | |
135 | * "name=" prefix. | |
136 | * | |
137 | * We require absolute cgroup paths. When returning, we will always | |
138 | * generate paths with multiple adjacent / removed. | |
139 | */ | |
140 | ||
c6c18be3 | 141 | int cg_enumerate_processes(const char *controller, const char *path, FILE **_f); |
c6c18be3 | 142 | int cg_read_pid(FILE *f, pid_t *_pid); |
ab2c3861 TH |
143 | int cg_read_event(const char *controller, const char *path, const char *event, |
144 | char **val); | |
c6c18be3 | 145 | |
35d2e7ec LP |
146 | int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d); |
147 | int cg_read_subgroup(DIR *d, char **fn); | |
148 | ||
1d98fef1 LP |
149 | typedef enum CGroupFlags { |
150 | CGROUP_SIGCONT = 1, | |
151 | CGROUP_IGNORE_SELF = 2, | |
152 | CGROUP_REMOVE = 4, | |
153 | } CGroupFlags; | |
8c6db833 | 154 | |
1d98fef1 LP |
155 | typedef void (*cg_kill_log_func_t)(pid_t pid, int sig, void *userdata); |
156 | ||
157 | int cg_kill(const char *controller, const char *path, int sig, CGroupFlags flags, Set *s, cg_kill_log_func_t kill_log, void *userdata); | |
158 | 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); | |
159 | ||
160 | int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags); | |
161 | int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags); | |
162 | int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags); | |
35d2e7ec LP |
163 | |
164 | int cg_split_spec(const char *spec, char **controller, char **path); | |
7027ff61 | 165 | int cg_mangle_path(const char *path, char **result); |
8c6db833 LP |
166 | |
167 | int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs); | |
3474ae3c | 168 | int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs); |
7027ff61 LP |
169 | |
170 | int cg_pid_get_path(const char *controller, pid_t pid, char **path); | |
8c6db833 LP |
171 | |
172 | int cg_trim(const char *controller, const char *path, bool delete_root); | |
35d2e7ec | 173 | |
4ad49000 | 174 | int cg_rmdir(const char *controller, const char *path); |
8c6db833 | 175 | |
4ad49000 | 176 | int cg_create(const char *controller, const char *path); |
8c6db833 | 177 | int cg_attach(const char *controller, const char *path, pid_t pid); |
13b84ec7 | 178 | int cg_attach_fallback(const char *controller, const char *path, pid_t pid); |
8c6db833 LP |
179 | int cg_create_and_attach(const char *controller, const char *path, pid_t pid); |
180 | ||
4ad49000 | 181 | int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value); |
934277fe | 182 | int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret); |
66ebf6c0 | 183 | int cg_get_keyed_attribute(const char *controller, const char *path, const char *attribute, const char **keys, char **values); |
4ad49000 | 184 | |
8c6db833 | 185 | int cg_set_group_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid); |
4ad49000 | 186 | int cg_set_task_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid); |
8c6db833 | 187 | |
4b58153d LP |
188 | int cg_set_xattr(const char *controller, const char *path, const char *name, const void *value, size_t size, int flags); |
189 | int cg_get_xattr(const char *controller, const char *path, const char *name, void *value, size_t size); | |
190 | ||
8c6db833 | 191 | int cg_install_release_agent(const char *controller, const char *agent); |
ad929bcc | 192 | int cg_uninstall_release_agent(const char *controller); |
8c6db833 | 193 | |
6f883237 LP |
194 | int cg_is_empty(const char *controller, const char *path); |
195 | int cg_is_empty_recursive(const char *controller, const char *path); | |
8c6db833 | 196 | |
7027ff61 | 197 | int cg_get_root_path(char **path); |
6c03089c | 198 | |
7027ff61 | 199 | int cg_path_get_session(const char *path, char **session); |
ae018d9b | 200 | int cg_path_get_owner_uid(const char *path, uid_t *uid); |
6c03089c LP |
201 | int cg_path_get_unit(const char *path, char **unit); |
202 | int cg_path_get_user_unit(const char *path, char **unit); | |
7027ff61 | 203 | int cg_path_get_machine_name(const char *path, char **machine); |
1021b21b | 204 | int cg_path_get_slice(const char *path, char **slice); |
329ac4bc | 205 | int cg_path_get_user_slice(const char *path, char **slice); |
7027ff61 | 206 | |
751bc6ac | 207 | int cg_shift_path(const char *cgroup, const char *cached_root, const char **shifted); |
e9174f29 | 208 | int cg_pid_get_path_shifted(pid_t pid, const char *cached_root, char **cgroup); |
6c03089c | 209 | |
7027ff61 | 210 | int cg_pid_get_session(pid_t pid, char **session); |
ae018d9b | 211 | int cg_pid_get_owner_uid(pid_t pid, uid_t *uid); |
ba1261bc | 212 | int cg_pid_get_unit(pid_t pid, char **unit); |
ef1673d1 | 213 | int cg_pid_get_user_unit(pid_t pid, char **unit); |
7027ff61 | 214 | int cg_pid_get_machine_name(pid_t pid, char **machine); |
1021b21b | 215 | int cg_pid_get_slice(pid_t pid, char **slice); |
329ac4bc | 216 | int cg_pid_get_user_slice(pid_t pid, char **slice); |
1f73f0f1 | 217 | |
7027ff61 | 218 | int cg_path_decode_unit(const char *cgroup, char **unit); |
96cde13a | 219 | |
ae018d9b | 220 | char *cg_escape(const char *p); |
44a6b1b6 | 221 | char *cg_unescape(const char *p) _pure_; |
78edb35a | 222 | |
185a0874 | 223 | bool cg_controller_is_valid(const char *p); |
a016b922 LP |
224 | |
225 | int cg_slice_to_path(const char *unit, char **ret); | |
4ad49000 | 226 | |
efdb0237 | 227 | typedef const char* (*cg_migrate_callback_t)(CGroupMask mask, void *userdata); |
03b90d4b | 228 | |
efdb0237 LP |
229 | int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path); |
230 | int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_migrate_callback_t callback, void *userdata); | |
231 | int cg_attach_many_everywhere(CGroupMask supported, const char *path, Set* pids, cg_migrate_callback_t callback, void *userdata); | |
232 | int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to, cg_migrate_callback_t callback, void *userdata); | |
233 | int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root); | |
234 | int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p); | |
4ad49000 | 235 | |
efdb0237 | 236 | int cg_mask_supported(CGroupMask *ret); |
b12afc8c LP |
237 | |
238 | int cg_kernel_controllers(Set *controllers); | |
efdb0237 | 239 | |
3228995c CB |
240 | bool cg_ns_supported(void); |
241 | ||
ca2f6384 | 242 | int cg_all_unified(void); |
5da38d07 | 243 | int cg_unified(const char *controller); |
efdb0237 LP |
244 | void cg_unified_flush(void); |
245 | ||
246 | bool cg_is_unified_wanted(void); | |
247 | bool cg_is_legacy_wanted(void); | |
5da38d07 TH |
248 | bool cg_is_unified_systemd_controller_wanted(void); |
249 | bool cg_is_legacy_systemd_controller_wanted(void); | |
efdb0237 LP |
250 | |
251 | const char* cgroup_controller_to_string(CGroupController c) _const_; | |
252 | CGroupController cgroup_controller_from_string(const char *s) _pure_; | |
d53d9474 | 253 | |
13c31542 | 254 | int cg_weight_parse(const char *s, uint64_t *ret); |
d53d9474 LP |
255 | int cg_cpu_shares_parse(const char *s, uint64_t *ret); |
256 | int cg_blkio_weight_parse(const char *s, uint64_t *ret); |