cgroup-util.h revision 03a7b521e3ffb7f5d153d90480ba5d4bc29d1e8f
124baf9a815afca02e01743867baf8319557e921kenneth_suter/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter#pragma once
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter/***
124baf9a815afca02e01743867baf8319557e921kenneth_suter This file is part of systemd.
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter Copyright 2010 Lennart Poettering
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter systemd is free software; you can redistribute it and/or modify it
124baf9a815afca02e01743867baf8319557e921kenneth_suter under the terms of the GNU Lesser General Public License as published by
124baf9a815afca02e01743867baf8319557e921kenneth_suter the Free Software Foundation; either version 2.1 of the License, or
124baf9a815afca02e01743867baf8319557e921kenneth_suter (at your option) any later version.
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter systemd is distributed in the hope that it will be useful, but
124baf9a815afca02e01743867baf8319557e921kenneth_suter WITHOUT ANY WARRANTY; without even the implied warranty of
124baf9a815afca02e01743867baf8319557e921kenneth_suter MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
124baf9a815afca02e01743867baf8319557e921kenneth_suter Lesser General Public License for more details.
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter You should have received a copy of the GNU Lesser General Public License
124baf9a815afca02e01743867baf8319557e921kenneth_suter along with systemd; If not, see <http://www.gnu.org/licenses/>.
124baf9a815afca02e01743867baf8319557e921kenneth_suter***/
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter#include <sys/types.h>
65e99be301d5a19db33f25841f671756e8dbb9b5ludovicp#include <stdio.h>
124baf9a815afca02e01743867baf8319557e921kenneth_suter#include <dirent.h>
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter#include "set.h"
124baf9a815afca02e01743867baf8319557e921kenneth_suter#include "def.h"
124baf9a815afca02e01743867baf8319557e921kenneth_suter
124baf9a815afca02e01743867baf8319557e921kenneth_suter/* An enum of well known cgroup controllers */
124baf9a815afca02e01743867baf8319557e921kenneth_sutertypedef enum CGroupController {
24d6db06810f2ea747f6dff60d483e4fca3aaa13davidely CGROUP_CONTROLLER_CPU,
124baf9a815afca02e01743867baf8319557e921kenneth_suter CGROUP_CONTROLLER_CPUACCT,
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter CGROUP_CONTROLLER_BLKIO,
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter CGROUP_CONTROLLER_MEMORY,
124baf9a815afca02e01743867baf8319557e921kenneth_suter CGROUP_CONTROLLER_DEVICES,
124baf9a815afca02e01743867baf8319557e921kenneth_suter CGROUP_CONTROLLER_PIDS,
124baf9a815afca02e01743867baf8319557e921kenneth_suter _CGROUP_CONTROLLER_MAX,
24d6db06810f2ea747f6dff60d483e4fca3aaa13davidely _CGROUP_CONTROLLER_INVALID = -1,
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter} CGroupController;
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter#define CGROUP_CONTROLLER_TO_MASK(c) (1 << (c))
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_suter
b4d83f40b246f01d3fce58e93251be9776f36ac1kenneth_suter/* A bit mask of well known cgroup controllers */
9aa7345ed04cb0b19c9302863d6012606c67c0c6kenneth_sutertypedef enum CGroupMask {
124baf9a815afca02e01743867baf8319557e921kenneth_suter CGROUP_MASK_CPU = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPU),
CGROUP_MASK_CPUACCT = CGROUP_CONTROLLER_TO_MASK(CGROUP_CONTROLLER_CPUACCT),
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_ALL = CGROUP_CONTROLLER_TO_MASK(_CGROUP_CONTROLLER_MAX) - 1
} CGroupMask;
/*
* 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_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
int cg_read_subgroup(DIR *d, char **fn);
int cg_kill(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, Set *s);
int cg_kill_recursive(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, bool remove, Set *s);
int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self);
int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self, bool remove);
int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self, bool rem);
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_set_group_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
int cg_set_task_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
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_kernel_controllers(Set *controllers);
int cg_unified(void);
void cg_unified_flush(void);
bool cg_is_unified_wanted(void);
bool cg_is_legacy_wanted(void);
const char* cgroup_controller_to_string(CGroupController c) _const_;
CGroupController cgroup_controller_from_string(const char *s) _pure_;