[thirdparty/systemd.git] / src / basic / cgroup-util.h

/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once

#include <dirent.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/statfs.h>
#include <sys/types.h>

#include "def.h"
#include "hashmap.h"
#include "macro.h"
#include "set.h"

#define SYSTEMD_CGROUP_CONTROLLER_LEGACY "name=systemd"
#define SYSTEMD_CGROUP_CONTROLLER_HYBRID "name=unified"
#define SYSTEMD_CGROUP_CONTROLLER "_systemd"

/* An enum of well known cgroup controllers */
typedef enum CGroupController {
        /* Original cgroup controllers */
        CGROUP_CONTROLLER_CPU,
        CGROUP_CONTROLLER_CPUACCT,    /* v1 only */
        CGROUP_CONTROLLER_IO,         /* v2 only */
        CGROUP_CONTROLLER_BLKIO,      /* v1 only */
        CGROUP_CONTROLLER_MEMORY,
        CGROUP_CONTROLLER_DEVICES,    /* v1 only */
        CGROUP_CONTROLLER_PIDS,

        /* BPF-based pseudo-controllers, v2 only */
        CGROUP_CONTROLLER_BPF_FIREWALL,

        _CGROUP_CONTROLLER_MAX,
        _CGROUP_CONTROLLER_INVALID = -1,
} CGroupController;

#define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c))

/* A bit mask of well known cgroup controllers */
typedef enum CGroupMask {
        CGROUP_MASK_CPU = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPU),
        CGROUP_MASK_CPUACCT = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPUACCT),
        CGROUP_MASK_IO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_IO),
        CGROUP_MASK_BLKIO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BLKIO),
        CGROUP_MASK_MEMORY = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_MEMORY),
        CGROUP_MASK_DEVICES = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_DEVICES),
        CGROUP_MASK_PIDS = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_PIDS),
        CGROUP_MASK_BPF_FIREWALL = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BPF_FIREWALL),
        _CGROUP_MASK_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1
} CGroupMask;

/* Special values for all weight knobs on unified hierarchy */
#define CGROUP_WEIGHT_INVALID ((uint64_t) -1)
#define CGROUP_WEIGHT_MIN UINT64_C(1)
#define CGROUP_WEIGHT_MAX UINT64_C(10000)
#define CGROUP_WEIGHT_DEFAULT UINT64_C(100)

#define CGROUP_LIMIT_MIN UINT64_C(0)
#define CGROUP_LIMIT_MAX ((uint64_t) -1)

static inline bool CGROUP_WEIGHT_IS_OK(uint64_t x) {
        return
            x == CGROUP_WEIGHT_INVALID ||
            (x >= CGROUP_WEIGHT_MIN && x <= CGROUP_WEIGHT_MAX);
}

/* IO limits on unified hierarchy */
typedef enum CGroupIOLimitType {
        CGROUP_IO_RBPS_MAX,
        CGROUP_IO_WBPS_MAX,
        CGROUP_IO_RIOPS_MAX,
        CGROUP_IO_WIOPS_MAX,

        _CGROUP_IO_LIMIT_TYPE_MAX,
        _CGROUP_IO_LIMIT_TYPE_INVALID = -1
} CGroupIOLimitType;

extern const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX];

const char* cgroup_io_limit_type_to_string(CGroupIOLimitType t) _const_;
CGroupIOLimitType cgroup_io_limit_type_from_string(const char *s) _pure_;

/* Special values for the cpu.shares attribute */
#define CGROUP_CPU_SHARES_INVALID ((uint64_t) -1)
#define CGROUP_CPU_SHARES_MIN UINT64_C(2)
#define CGROUP_CPU_SHARES_MAX UINT64_C(262144)
#define CGROUP_CPU_SHARES_DEFAULT UINT64_C(1024)

static inline bool CGROUP_CPU_SHARES_IS_OK(uint64_t x) {
        return
            x == CGROUP_CPU_SHARES_INVALID ||
            (x >= CGROUP_CPU_SHARES_MIN && x <= CGROUP_CPU_SHARES_MAX);
}

/* Special values for the blkio.weight attribute */
#define CGROUP_BLKIO_WEIGHT_INVALID ((uint64_t) -1)
#define CGROUP_BLKIO_WEIGHT_MIN UINT64_C(10)
#define CGROUP_BLKIO_WEIGHT_MAX UINT64_C(1000)
#define CGROUP_BLKIO_WEIGHT_DEFAULT UINT64_C(500)

static inline bool CGROUP_BLKIO_WEIGHT_IS_OK(uint64_t x) {
        return
            x == CGROUP_BLKIO_WEIGHT_INVALID ||
            (x >= CGROUP_BLKIO_WEIGHT_MIN && x <= CGROUP_BLKIO_WEIGHT_MAX);
}

/* Default resource limits */
#define DEFAULT_TASKS_MAX_PERCENTAGE            15U /* 15% of PIDs, 4915 on default settings */
#define DEFAULT_USER_TASKS_MAX_PERCENTAGE       33U /* 33% of PIDs, 10813 on default settings */

typedef enum CGroupUnified {
        CGROUP_UNIFIED_UNKNOWN = -1,
        CGROUP_UNIFIED_NONE = 0,        /* Both systemd and controllers on legacy */
        CGROUP_UNIFIED_SYSTEMD = 1,     /* Only systemd on unified */
        CGROUP_UNIFIED_ALL = 2,         /* Both systemd and controllers on unified */
} CGroupUnified;

/*
 * General rules:
 *
 * We accept named hierarchies in the syntax "foo" and "name=foo".
 *
 * We expect that named hierarchies do not conflict in name with a
 * kernel hierarchy, modulo the "name=" prefix.
 *
 * We always generate "normalized" controller names, i.e. without the
 * "name=" prefix.
 *
 * We require absolute cgroup paths. When returning, we will always
 * generate paths with multiple adjacent / removed.
 */

int cg_enumerate_processes(const char *controller, const char *path, FILE **_f);
int cg_read_pid(FILE *f, pid_t *_pid);
int cg_read_event(const char *controller, const char *path, const char *event,
                  char **val);

int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
int cg_read_subgroup(DIR *d, char **fn);

typedef enum CGroupFlags {
        CGROUP_SIGCONT     = 1,
        CGROUP_IGNORE_SELF = 2,
        CGROUP_REMOVE      = 4,
} CGroupFlags;

typedef void (*cg_kill_log_func_t)(pid_t pid, int sig, void *userdata);

int cg_kill(const char *controller, const char *path, int sig, CGroupFlags flags, Set *s, cg_kill_log_func_t kill_log, void *userdata);
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);

int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);
int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, CGroupFlags flags);

int cg_split_spec(const char *spec, char **controller, char **path);
int cg_mangle_path(const char *path, char **result);

int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs);
int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs);

int cg_pid_get_path(const char *controller, pid_t pid, char **path);

int cg_trim(const char *controller, const char *path, bool delete_root);

int cg_rmdir(const char *controller, const char *path);

int cg_create(const char *controller, const char *path);
int cg_attach(const char *controller, const char *path, pid_t pid);
int cg_attach_fallback(const char *controller, const char *path, pid_t pid);
int cg_create_and_attach(const char *controller, const char *path, pid_t pid);

int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value);
int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret);
int cg_get_keyed_attribute(const char *controller, const char *path, const char *attribute, char **keys, char **values);

int cg_set_access(const char *controller, const char *path, uid_t uid, gid_t gid);

int cg_set_xattr(const char *controller, const char *path, const char *name, const void *value, size_t size, int flags);
int cg_get_xattr(const char *controller, const char *path, const char *name, void *value, size_t size);

int cg_install_release_agent(const char *controller, const char *agent);
int cg_uninstall_release_agent(const char *controller);

int cg_is_empty(const char *controller, const char *path);
int cg_is_empty_recursive(const char *controller, const char *path);

int cg_get_root_path(char **path);

int cg_path_get_session(const char *path, char **session);
int cg_path_get_owner_uid(const char *path, uid_t *uid);
int cg_path_get_unit(const char *path, char **unit);
int cg_path_get_user_unit(const char *path, char **unit);
int cg_path_get_machine_name(const char *path, char **machine);
int cg_path_get_slice(const char *path, char **slice);
int cg_path_get_user_slice(const char *path, char **slice);

int cg_shift_path(const char *cgroup, const char *cached_root, const char **shifted);
int cg_pid_get_path_shifted(pid_t pid, const char *cached_root, char **cgroup);

int cg_pid_get_session(pid_t pid, char **session);
int cg_pid_get_owner_uid(pid_t pid, uid_t *uid);
int cg_pid_get_unit(pid_t pid, char **unit);
int cg_pid_get_user_unit(pid_t pid, char **unit);
int cg_pid_get_machine_name(pid_t pid, char **machine);
int cg_pid_get_slice(pid_t pid, char **slice);
int cg_pid_get_user_slice(pid_t pid, char **slice);

int cg_path_decode_unit(const char *cgroup, char **unit);

char *cg_escape(const char *p);
char *cg_unescape(const char *p) _pure_;

bool cg_controller_is_valid(const char *p);

int cg_slice_to_path(const char *unit, char **ret);

typedef const char* (*cg_migrate_callback_t)(CGroupMask mask, void *userdata);

int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path);
int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_migrate_callback_t callback, void *userdata);
int cg_attach_many_everywhere(CGroupMask supported, const char *path, Set* pids, cg_migrate_callback_t callback, void *userdata);
int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to, cg_migrate_callback_t callback, void *userdata);
int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root);
int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p);

int cg_mask_supported(CGroupMask *ret);
int cg_mask_from_string(const char *s, CGroupMask *ret);
int cg_mask_to_string(CGroupMask mask, char **ret);

int cg_kernel_controllers(Set **controllers);

bool cg_ns_supported(void);

int cg_all_unified(void);
int cg_hybrid_unified(void);
int cg_unified_controller(const char *controller);
int cg_unified_flush(void);

bool cg_is_unified_wanted(void);
bool cg_is_legacy_wanted(void);
bool cg_is_hybrid_wanted(void);

const char* cgroup_controller_to_string(CGroupController c) _const_;
CGroupController cgroup_controller_from_string(const char *s) _pure_;

int cg_weight_parse(const char *s, uint64_t *ret);
int cg_cpu_shares_parse(const char *s, uint64_t *ret);
int cg_blkio_weight_parse(const char *s, uint64_t *ret);

bool is_cgroup_fs(const struct statfs *s);
bool fd_is_cgroup_fs(int fd);
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
c2f1db8f	2	#pragma once
8c6db833	3
35d2e7ec	4	#include <dirent.h>
11c3a366 TA	5	#include <stdbool.h>
11c3a366 TA	6	#include <stdint.h>
71d35b6b	7	#include <stdio.h>
f0bef277	8	#include <sys/statfs.h>
71d35b6b	9	#include <sys/types.h>
c6c18be3	10
f6a6225e	11	#include "def.h"
11c3a366 TA	12	#include "hashmap.h"
11c3a366 TA	13	#include "macro.h"
93cc7779	14	#include "set.h"
8c6db833	15
68ac0d05 LP	16	#define SYSTEMD_CGROUP_CONTROLLER_LEGACY "name=systemd"
	17	#define SYSTEMD_CGROUP_CONTROLLER_HYBRID "name=unified"
	18	#define SYSTEMD_CGROUP_CONTROLLER "_systemd"
	19
efdb0237 LP	20	/* An enum of well known cgroup controllers */
efdb0237 LP	21	typedef enum CGroupController {
17f14955	22	/* Original cgroup controllers */
efdb0237	23	CGROUP_CONTROLLER_CPU,
00b4a247 LP	24	CGROUP_CONTROLLER_CPUACCT, /* v1 only */
	25	CGROUP_CONTROLLER_IO, /* v2 only */
	26	CGROUP_CONTROLLER_BLKIO, /* v1 only */
efdb0237	27	CGROUP_CONTROLLER_MEMORY,
00b4a247	28	CGROUP_CONTROLLER_DEVICES, /* v1 only */
03a7b521	29	CGROUP_CONTROLLER_PIDS,
17f14955 RG	30
	31	/* BPF-based pseudo-controllers, v2 only */
	32	CGROUP_CONTROLLER_BPF_FIREWALL,
	33
efdb0237 LP	34	_CGROUP_CONTROLLER_MAX,
	35	_CGROUP_CONTROLLER_INVALID = -1,
	36	} CGroupController;
	37
	38	#define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c))
	39
4ad49000	40	/* A bit mask of well known cgroup controllers */
efdb0237 LP	41	typedef enum CGroupMask {
	42	CGROUP_MASK_CPU = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPU),
	43	CGROUP_MASK_CPUACCT = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPUACCT),
13c31542	44	CGROUP_MASK_IO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_IO),
efdb0237 LP	45	CGROUP_MASK_BLKIO = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BLKIO),
efdb0237 LP	46	CGROUP_MASK_MEMORY = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_MEMORY),
3905f127	47	CGROUP_MASK_DEVICES = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_DEVICES),
03a7b521	48	CGROUP_MASK_PIDS = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_PIDS),
17f14955	49	CGROUP_MASK_BPF_FIREWALL = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_BPF_FIREWALL),
efdb0237 LP	50	_CGROUP_MASK_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1
efdb0237 LP	51	} CGroupMask;
4ad49000	52
13c31542 TH	53	/* Special values for all weight knobs on unified hierarchy */
	54	#define CGROUP_WEIGHT_INVALID ((uint64_t) -1)
	55	#define CGROUP_WEIGHT_MIN UINT64_C(1)
	56	#define CGROUP_WEIGHT_MAX UINT64_C(10000)
	57	#define CGROUP_WEIGHT_DEFAULT UINT64_C(100)
	58
	59	#define CGROUP_LIMIT_MIN UINT64_C(0)
	60	#define CGROUP_LIMIT_MAX ((uint64_t) -1)
	61
	62	static inline bool CGROUP_WEIGHT_IS_OK(uint64_t x) {
	63	return
	64	x == CGROUP_WEIGHT_INVALID \|\|
	65	(x >= CGROUP_WEIGHT_MIN && x <= CGROUP_WEIGHT_MAX);
	66	}
	67
9be57249 TH	68	/* IO limits on unified hierarchy */
	69	typedef enum CGroupIOLimitType {
	70	CGROUP_IO_RBPS_MAX,
	71	CGROUP_IO_WBPS_MAX,
ac06a0cf TH	72	CGROUP_IO_RIOPS_MAX,
ac06a0cf TH	73	CGROUP_IO_WIOPS_MAX,
9be57249 TH	74
	75	_CGROUP_IO_LIMIT_TYPE_MAX,
	76	_CGROUP_IO_LIMIT_TYPE_INVALID = -1
	77	} CGroupIOLimitType;
	78
	79	extern const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX];
	80
	81	const char* cgroup_io_limit_type_to_string(CGroupIOLimitType t) _const_;
	82	CGroupIOLimitType cgroup_io_limit_type_from_string(const char *s) _pure_;
	83
d53d9474 LP	84	/* Special values for the cpu.shares attribute */
	85	#define CGROUP_CPU_SHARES_INVALID ((uint64_t) -1)
	86	#define CGROUP_CPU_SHARES_MIN UINT64_C(2)
	87	#define CGROUP_CPU_SHARES_MAX UINT64_C(262144)
	88	#define CGROUP_CPU_SHARES_DEFAULT UINT64_C(1024)
	89
	90	static inline bool CGROUP_CPU_SHARES_IS_OK(uint64_t x) {
	91	return
	92	x == CGROUP_CPU_SHARES_INVALID \|\|
	93	(x >= CGROUP_CPU_SHARES_MIN && x <= CGROUP_CPU_SHARES_MAX);
	94	}
	95
	96	/* Special values for the blkio.weight attribute */
	97	#define CGROUP_BLKIO_WEIGHT_INVALID ((uint64_t) -1)
	98	#define CGROUP_BLKIO_WEIGHT_MIN UINT64_C(10)
	99	#define CGROUP_BLKIO_WEIGHT_MAX UINT64_C(1000)
	100	#define CGROUP_BLKIO_WEIGHT_DEFAULT UINT64_C(500)
	101
	102	static inline bool CGROUP_BLKIO_WEIGHT_IS_OK(uint64_t x) {
	103	return
	104	x == CGROUP_BLKIO_WEIGHT_INVALID \|\|
	105	(x >= CGROUP_BLKIO_WEIGHT_MIN && x <= CGROUP_BLKIO_WEIGHT_MAX);
	106	}
	107
f5058264 TH	108	/* Default resource limits */
	109	#define DEFAULT_TASKS_MAX_PERCENTAGE 15U /* 15% of PIDs, 4915 on default settings */
	110	#define DEFAULT_USER_TASKS_MAX_PERCENTAGE 33U /* 33% of PIDs, 10813 on default settings */
	111
5da38d07 TH	112	typedef enum CGroupUnified {
	113	CGROUP_UNIFIED_UNKNOWN = -1,
	114	CGROUP_UNIFIED_NONE = 0, /* Both systemd and controllers on legacy */
	115	CGROUP_UNIFIED_SYSTEMD = 1, /* Only systemd on unified */
	116	CGROUP_UNIFIED_ALL = 2, /* Both systemd and controllers on unified */
	117	} CGroupUnified;
	118
5954c074 LP	119	/*
	120	* General rules:
	121	*
	122	* We accept named hierarchies in the syntax "foo" and "name=foo".
	123	*
	124	* We expect that named hierarchies do not conflict in name with a
	125	* kernel hierarchy, modulo the "name=" prefix.
	126	*
	127	* We always generate "normalized" controller names, i.e. without the
	128	* "name=" prefix.
	129	*
	130	* We require absolute cgroup paths. When returning, we will always
	131	* generate paths with multiple adjacent / removed.
	132	*/
	133
c6c18be3	134	int cg_enumerate_processes(const char controller, const char path, FILE **_f);
c6c18be3	135	int cg_read_pid(FILE f, pid_t _pid);
ab2c3861 TH	136	int cg_read_event(const char controller, const char path, const char *event,
ab2c3861 TH	137	char **val);
c6c18be3	138
35d2e7ec LP	139	int cg_enumerate_subgroups(const char controller, const char path, DIR **_d);
	140	int cg_read_subgroup(DIR d, char *fn);
	141
1d98fef1 LP	142	typedef enum CGroupFlags {
	143	CGROUP_SIGCONT = 1,
	144	CGROUP_IGNORE_SELF = 2,
	145	CGROUP_REMOVE = 4,
	146	} CGroupFlags;
8c6db833	147
1d98fef1 LP	148	typedef void (cg_kill_log_func_t)(pid_t pid, int sig, void userdata);
	149
	150	int cg_kill(const char controller, const char path, int sig, CGroupFlags flags, Set s, cg_kill_log_func_t kill_log, void userdata);
	151	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);
	152
	153	int cg_migrate(const char cfrom, const char pfrom, const char cto, const char pto, CGroupFlags flags);
	154	int cg_migrate_recursive(const char cfrom, const char pfrom, const char cto, const char pto, CGroupFlags flags);
	155	int cg_migrate_recursive_fallback(const char cfrom, const char pfrom, const char cto, const char pto, CGroupFlags flags);
35d2e7ec LP	156
35d2e7ec LP	157	int cg_split_spec(const char spec, char controller, char *path);
7027ff61	158	int cg_mangle_path(const char path, char *result);
8c6db833 LP	159
8c6db833 LP	160	int cg_get_path(const char controller, const char path, const char suffix, char *fs);
3474ae3c	161	int cg_get_path_and_check(const char controller, const char path, const char suffix, char *fs);
7027ff61 LP	162
7027ff61 LP	163	int cg_pid_get_path(const char controller, pid_t pid, char *path);
8c6db833 LP	164
8c6db833 LP	165	int cg_trim(const char controller, const char path, bool delete_root);
35d2e7ec	166
4ad49000	167	int cg_rmdir(const char controller, const char path);
8c6db833	168
4ad49000	169	int cg_create(const char controller, const char path);
8c6db833	170	int cg_attach(const char controller, const char path, pid_t pid);
13b84ec7	171	int cg_attach_fallback(const char controller, const char path, pid_t pid);
8c6db833 LP	172	int cg_create_and_attach(const char controller, const char path, pid_t pid);
8c6db833 LP	173
4ad49000	174	int cg_set_attribute(const char controller, const char path, const char attribute, const char value);
934277fe	175	int cg_get_attribute(const char controller, const char path, const char attribute, char *ret);
b734a4ff	176	int cg_get_keyed_attribute(const char controller, const char path, const char attribute, char keys, char *values);
4ad49000	177
62b9bb26	178	int cg_set_access(const char controller, const char path, uid_t uid, gid_t gid);
8c6db833	179
4b58153d LP	180	int cg_set_xattr(const char controller, const char path, const char name, const void value, size_t size, int flags);
	181	int cg_get_xattr(const char controller, const char path, const char name, void value, size_t size);
	182
8c6db833	183	int cg_install_release_agent(const char controller, const char agent);
ad929bcc	184	int cg_uninstall_release_agent(const char *controller);
8c6db833	185
6f883237 LP	186	int cg_is_empty(const char controller, const char path);
6f883237 LP	187	int cg_is_empty_recursive(const char controller, const char path);
8c6db833	188
7027ff61	189	int cg_get_root_path(char **path);
6c03089c	190
7027ff61	191	int cg_path_get_session(const char path, char *session);
ae018d9b	192	int cg_path_get_owner_uid(const char path, uid_t uid);
6c03089c LP	193	int cg_path_get_unit(const char path, char *unit);
6c03089c LP	194	int cg_path_get_user_unit(const char path, char *unit);
7027ff61	195	int cg_path_get_machine_name(const char path, char *machine);
1021b21b	196	int cg_path_get_slice(const char path, char *slice);
329ac4bc	197	int cg_path_get_user_slice(const char path, char *slice);
7027ff61	198
751bc6ac	199	int cg_shift_path(const char cgroup, const char cached_root, const char **shifted);
e9174f29	200	int cg_pid_get_path_shifted(pid_t pid, const char cached_root, char *cgroup);
6c03089c	201
7027ff61	202	int cg_pid_get_session(pid_t pid, char **session);
ae018d9b	203	int cg_pid_get_owner_uid(pid_t pid, uid_t *uid);
ba1261bc	204	int cg_pid_get_unit(pid_t pid, char **unit);
ef1673d1	205	int cg_pid_get_user_unit(pid_t pid, char **unit);
7027ff61	206	int cg_pid_get_machine_name(pid_t pid, char **machine);
1021b21b	207	int cg_pid_get_slice(pid_t pid, char **slice);
329ac4bc	208	int cg_pid_get_user_slice(pid_t pid, char **slice);
1f73f0f1	209
7027ff61	210	int cg_path_decode_unit(const char cgroup, char *unit);
96cde13a	211
ae018d9b	212	char cg_escape(const char p);
44a6b1b6	213	char cg_unescape(const char p) _pure_;
78edb35a	214
185a0874	215	bool cg_controller_is_valid(const char *p);
a016b922 LP	216
a016b922 LP	217	int cg_slice_to_path(const char unit, char *ret);
4ad49000	218
efdb0237	219	typedef const char* (cg_migrate_callback_t)(CGroupMask mask, void userdata);
03b90d4b	220
efdb0237 LP	221	int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path);
	222	int cg_attach_everywhere(CGroupMask supported, const char path, pid_t pid, cg_migrate_callback_t callback, void userdata);
	223	int cg_attach_many_everywhere(CGroupMask supported, const char path, Set pids, cg_migrate_callback_t callback, void *userdata);
	224	int cg_migrate_everywhere(CGroupMask supported, const char from, const char to, cg_migrate_callback_t callback, void *userdata);
	225	int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root);
	226	int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p);
4ad49000	227
efdb0237	228	int cg_mask_supported(CGroupMask *ret);
aae7e17f FB	229	int cg_mask_from_string(const char s, CGroupMask ret);
aae7e17f FB	230	int cg_mask_to_string(CGroupMask mask, char **ret);
b12afc8c	231
6925a0de	232	int cg_kernel_controllers(Set **controllers);
efdb0237	233
3228995c CB	234	bool cg_ns_supported(void);
3228995c CB	235
b4cccbc1 LP	236	int cg_all_unified(void);
b4cccbc1 LP	237	int cg_hybrid_unified(void);
c22800e4	238	int cg_unified_controller(const char *controller);
415fc41c	239	int cg_unified_flush(void);
efdb0237 LP	240
	241	bool cg_is_unified_wanted(void);
	242	bool cg_is_legacy_wanted(void);
a4464b95	243	bool cg_is_hybrid_wanted(void);
efdb0237 LP	244
	245	const char* cgroup_controller_to_string(CGroupController c) _const_;
	246	CGroupController cgroup_controller_from_string(const char *s) _pure_;
d53d9474	247
13c31542	248	int cg_weight_parse(const char s, uint64_t ret);
d53d9474 LP	249	int cg_cpu_shares_parse(const char s, uint64_t ret);
d53d9474 LP	250	int cg_blkio_weight_parse(const char s, uint64_t ret);
f0bef277 EV	251
	252	bool is_cgroup_fs(const struct statfs *s);
	253	bool fd_is_cgroup_fs(int fd);