4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
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
11 (at your option) any later version.
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
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/types.h>
29 //#include "hashmap.h"
33 /* An enum of well known cgroup controllers */
34 typedef enum CGroupController {
35 CGROUP_CONTROLLER_CPU,
36 CGROUP_CONTROLLER_CPUACCT,
38 CGROUP_CONTROLLER_BLKIO,
39 CGROUP_CONTROLLER_MEMORY,
40 CGROUP_CONTROLLER_DEVICES,
41 CGROUP_CONTROLLER_PIDS,
42 _CGROUP_CONTROLLER_MAX,
43 _CGROUP_CONTROLLER_INVALID = -1,
46 #define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c))
48 /* A bit mask of well known cgroup controllers */
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),
52 CGROUP_MASK_IO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_IO),
53 CGROUP_MASK_BLKIO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BLKIO),
54 CGROUP_MASK_MEMORY = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_MEMORY),
55 CGROUP_MASK_DEVICES = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_DEVICES),
56 CGROUP_MASK_PIDS = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_PIDS),
57 _CGROUP_MASK_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1
60 #if 0 /// UNNEEDED by elogind
61 /* Special values for all weight knobs on unified hierarchy */
62 #define CGROUP_WEIGHT_INVALID ((uint64_t) -1)
63 #define CGROUP_WEIGHT_MIN UINT64_C(1)
64 #define CGROUP_WEIGHT_MAX UINT64_C(10000)
65 #define CGROUP_WEIGHT_DEFAULT UINT64_C(100)
67 #define CGROUP_LIMIT_MIN UINT64_C(0)
68 #define CGROUP_LIMIT_MAX ((uint64_t) -1)
70 static inline bool CGROUP_WEIGHT_IS_OK(uint64_t x) {
72 x == CGROUP_WEIGHT_INVALID ||
73 (x >= CGROUP_WEIGHT_MIN && x <= CGROUP_WEIGHT_MAX);
76 /* IO limits on unified hierarchy */
77 typedef enum CGroupIOLimitType {
83 _CGROUP_IO_LIMIT_TYPE_MAX,
84 _CGROUP_IO_LIMIT_TYPE_INVALID = -1
87 extern const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX];
89 const char* cgroup_io_limit_type_to_string(CGroupIOLimitType t) _const_;
90 CGroupIOLimitType cgroup_io_limit_type_from_string(const char *s) _pure_;
92 /* Special values for the cpu.shares attribute */
93 #define CGROUP_CPU_SHARES_INVALID ((uint64_t) -1)
94 #define CGROUP_CPU_SHARES_MIN UINT64_C(2)
95 #define CGROUP_CPU_SHARES_MAX UINT64_C(262144)
96 #define CGROUP_CPU_SHARES_DEFAULT UINT64_C(1024)
98 static inline bool CGROUP_CPU_SHARES_IS_OK(uint64_t x) {
100 x == CGROUP_CPU_SHARES_INVALID ||
101 (x >= CGROUP_CPU_SHARES_MIN && x <= CGROUP_CPU_SHARES_MAX);
104 /* Special values for the blkio.weight attribute */
105 #define CGROUP_BLKIO_WEIGHT_INVALID ((uint64_t) -1)
106 #define CGROUP_BLKIO_WEIGHT_MIN UINT64_C(10)
107 #define CGROUP_BLKIO_WEIGHT_MAX UINT64_C(1000)
108 #define CGROUP_BLKIO_WEIGHT_DEFAULT UINT64_C(500)
110 static inline bool CGROUP_BLKIO_WEIGHT_IS_OK(uint64_t x) {
112 x == CGROUP_BLKIO_WEIGHT_INVALID ||
113 (x >= CGROUP_BLKIO_WEIGHT_MIN && x <= CGROUP_BLKIO_WEIGHT_MAX);
120 * We accept named hierarchies in the syntax "foo" and "name=foo".
122 * We expect that named hierarchies do not conflict in name with a
123 * kernel hierarchy, modulo the "name=" prefix.
125 * We always generate "normalized" controller names, i.e. without the
128 * We require absolute cgroup paths. When returning, we will always
129 * generate paths with multiple adjacent / removed.
132 int cg_enumerate_processes(const char *controller, const char *path, FILE **_f);
133 int cg_read_pid(FILE *f, pid_t *_pid);
134 int cg_read_event(const char *controller, const char *path, const char *event,
137 int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
138 int cg_read_subgroup(DIR *d, char **fn);
140 typedef enum CGroupFlags {
142 CGROUP_IGNORE_SELF = 2,
146 typedef void (*cg_kill_log_func_t)(pid_t pid, int sig, void *userdata);
148 int cg_kill(const char *controller, const char *path, int sig, CGroupFlags flags, Set *s, cg_kill_log_func_t kill_log, void *userdata);
149 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);
151 int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
152 int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
153 int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
155 int cg_split_spec(const char *spec, char **controller, char **path);
156 int cg_mangle_path(const char *path, char **result);
158 int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs);
159 int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs);
161 int cg_pid_get_path(const char *controller, pid_t pid, char **path);
163 int cg_trim(const char *controller, const char *path, bool delete_root);
165 int cg_rmdir(const char *controller, const char *path);
167 int cg_create(const char *controller, const char *path);
168 int cg_attach(const char *controller, const char *path, pid_t pid);
169 int cg_attach_fallback(const char *controller, const char *path, pid_t pid);
170 int cg_create_and_attach(const char *controller, const char *path, pid_t pid);
172 int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value);
173 int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret);
175 #if 0 /// UNNEEDED by elogind
176 int cg_set_group_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
177 int cg_set_task_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
180 int cg_install_release_agent(const char *controller, const char *agent);
181 int cg_uninstall_release_agent(const char *controller);
183 int cg_is_empty(const char *controller, const char *path);
184 int cg_is_empty_recursive(const char *controller, const char *path);
186 int cg_get_root_path(char **path);
188 int cg_path_get_session(const char *path, char **session);
189 #if 0 /// UNNEEDED by elogind
190 int cg_path_get_owner_uid(const char *path, uid_t *uid);
191 int cg_path_get_unit(const char *path, char **unit);
192 int cg_path_get_user_unit(const char *path, char **unit);
193 int cg_path_get_machine_name(const char *path, char **machine);
194 int cg_path_get_slice(const char *path, char **slice);
195 int cg_path_get_user_slice(const char *path, char **slice);
198 int cg_shift_path(const char *cgroup, const char *cached_root, const char **shifted);
199 int cg_pid_get_path_shifted(pid_t pid, const char *cached_root, char **cgroup);
201 int cg_pid_get_session(pid_t pid, char **session);
202 #if 0 /// UNNEEDED by elogind
203 int cg_pid_get_owner_uid(pid_t pid, uid_t *uid);
204 int cg_pid_get_unit(pid_t pid, char **unit);
205 int cg_pid_get_user_unit(pid_t pid, char **unit);
206 int cg_pid_get_machine_name(pid_t pid, char **machine);
207 int cg_pid_get_slice(pid_t pid, char **slice);
208 int cg_pid_get_user_slice(pid_t pid, char **slice);
210 int cg_path_decode_unit(const char *cgroup, char **unit);
213 char *cg_escape(const char *p);
214 char *cg_unescape(const char *p) _pure_;
216 bool cg_controller_is_valid(const char *p);
218 #if 0 /// UNNEEDED by elogind
219 int cg_slice_to_path(const char *unit, char **ret);
221 typedef const char* (*cg_migrate_callback_t)(CGroupMask mask, void *userdata);
223 int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path);
224 int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_migrate_callback_t callback, void *userdata);
225 int cg_attach_many_everywhere(CGroupMask supported, const char *path, Set* pids, cg_migrate_callback_t callback, void *userdata);
226 int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to, cg_migrate_callback_t callback, void *userdata);
227 int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root);
228 int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p);
231 int cg_mask_supported(CGroupMask *ret);
233 #if 0 /// UNNEEDED by elogind
234 int cg_kernel_controllers(Set *controllers);
236 bool cg_ns_supported(void);
239 int cg_unified(void);
240 #if 0 /// UNNEEDED by elogind
241 void cg_unified_flush(void);
243 bool cg_is_unified_wanted(void);
245 bool cg_is_legacy_wanted(void);
247 const char* cgroup_controller_to_string(CGroupController c) _const_;
248 CGroupController cgroup_controller_from_string(const char *s) _pure_;
250 #if 0 /// UNNEEDED by elogind
251 int cg_weight_parse(const char *s, uint64_t *ret);
252 int cg_cpu_shares_parse(const char *s, uint64_t *ret);
253 int cg_blkio_weight_parse(const char *s, uint64_t *ret);