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-rw-r--r--src/basic/cgroup-util.h192
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diff --git a/src/basic/cgroup-util.h b/src/basic/cgroup-util.h
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-#pragma once
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <dirent.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <sys/types.h>
-
-#include "def.h"
-#include "hashmap.h"
-#include "macro.h"
-#include "set.h"
-
-/* An enum of well known cgroup controllers */
-typedef enum CGroupController {
- CGROUP_CONTROLLER_CPU,
- CGROUP_CONTROLLER_CPUACCT,
- CGROUP_CONTROLLER_BLKIO,
- CGROUP_CONTROLLER_MEMORY,
- CGROUP_CONTROLLER_DEVICES,
- CGROUP_CONTROLLER_PIDS,
- _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_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;
-
-/* 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);
-}
-
-/*
- * 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_;
-
-int cg_cpu_shares_parse(const char *s, uint64_t *ret);
-int cg_blkio_weight_parse(const char *s, uint64_t *ret);