+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
-
-#ifndef foounithfoo
-#define foounithfoo
-
-/***
- 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 General Public License as published by
- the Free Software Foundation; either version 2 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdbool.h>
-#include <stdlib.h>
-
-typedef union Unit Unit;
-typedef struct Meta Meta;
-typedef struct UnitVTable UnitVTable;
-typedef enum UnitType UnitType;
-typedef enum UnitLoadState UnitLoadState;
-typedef enum UnitActiveState UnitActiveState;
-typedef enum UnitDependency UnitDependency;
-
-#include "set.h"
-#include "util.h"
-#include "list.h"
-#include "socket-util.h"
-#include "execute.h"
-
-#define UNIT_NAME_MAX 128
-#define DEFAULT_TIMEOUT_USEC (20*USEC_PER_SEC)
-#define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC)
-
-typedef enum KillMode {
- KILL_CONTROL_GROUP = 0,
- KILL_PROCESS_GROUP,
- KILL_PROCESS,
- KILL_NONE,
- _KILL_MODE_MAX,
- _KILL_MODE_INVALID = -1
-} KillMode;
-
-enum UnitType {
- UNIT_SERVICE = 0,
- UNIT_SOCKET,
- UNIT_TARGET,
- UNIT_DEVICE,
- UNIT_MOUNT,
- UNIT_AUTOMOUNT,
- UNIT_SNAPSHOT,
- UNIT_TIMER,
- UNIT_SWAP,
- _UNIT_TYPE_MAX,
- _UNIT_TYPE_INVALID = -1
-};
-
-enum UnitLoadState {
- UNIT_STUB,
- UNIT_LOADED,
- UNIT_FAILED,
- UNIT_MERGED,
- _UNIT_LOAD_STATE_MAX,
- _UNIT_LOAD_STATE_INVALID = -1
-};
-
-enum UnitActiveState {
- UNIT_ACTIVE,
- UNIT_ACTIVE_RELOADING,
- UNIT_INACTIVE,
- UNIT_ACTIVATING,
- UNIT_DEACTIVATING,
- _UNIT_ACTIVE_STATE_MAX,
- _UNIT_ACTIVE_STATE_INVALID = -1
-};
-
-static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
- return t == UNIT_ACTIVE || t == UNIT_ACTIVE_RELOADING;
-}
-
-static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
- return t == UNIT_ACTIVE || t == UNIT_ACTIVATING || t == UNIT_ACTIVE_RELOADING;
-}
-
-static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
- return t == UNIT_INACTIVE || t == UNIT_DEACTIVATING;
-}
-
-enum UnitDependency {
- /* Positive dependencies */
- UNIT_REQUIRES,
- UNIT_REQUIRES_OVERRIDABLE,
- UNIT_REQUISITE,
- UNIT_REQUISITE_OVERRIDABLE,
- UNIT_WANTS,
-
- /* Inverse of the above */
- UNIT_REQUIRED_BY, /* inverse of 'requires' and 'requisite' is 'required_by' */
- UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'soft_requires' and 'soft_requisite' is 'soft_required_by' */
- UNIT_WANTED_BY, /* inverse of 'wants' */
-
- /* Negative dependencies */
- UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicts' */
-
- /* Order */
- UNIT_BEFORE, /* inverse of 'before' is 'after' and vice versa */
- UNIT_AFTER,
-
- /* Reference information for GC logic */
- UNIT_REFERENCES, /* Inverse of 'references' is 'referenced_by' */
- UNIT_REFERENCED_BY,
-
- _UNIT_DEPENDENCY_MAX,
- _UNIT_DEPENDENCY_INVALID = -1
-};
-
-#include "manager.h"
-#include "job.h"
-#include "cgroup.h"
-
-struct Meta {
- Manager *manager;
-
- UnitType type;
- UnitLoadState load_state;
- Unit *merged_into;
-
- char *id; /* One name is special because we use it for identification. Points to an entry in the names set */
- char *instance;
-
- Set *names;
- Set *dependencies[_UNIT_DEPENDENCY_MAX];
-
- char *description;
- char *fragment_path; /* if loaded from a config file this is the primary path to it */
-
- /* If there is something to do with this unit, then this is
- * the job for it */
- Job *job;
-
- usec_t inactive_exit_timestamp;
- usec_t active_enter_timestamp;
- usec_t active_exit_timestamp;
- usec_t inactive_enter_timestamp;
-
- /* Counterparts in the cgroup filesystem */
- CGroupBonding *cgroup_bondings;
-
- /* Per type list */
- LIST_FIELDS(Meta, units_per_type);
-
- /* Load queue */
- LIST_FIELDS(Meta, load_queue);
-
- /* D-Bus queue */
- LIST_FIELDS(Meta, dbus_queue);
-
- /* Cleanup queue */
- LIST_FIELDS(Meta, cleanup_queue);
-
- /* GC queue */
- LIST_FIELDS(Meta, gc_queue);
-
- /* Used during GC sweeps */
- unsigned gc_marker;
-
- /* If we go down, pull down everything that depends on us, too */
- bool recursive_stop;
-
- /* Garbage collect us we nobody wants or requires us anymore */
- bool stop_when_unneeded;
-
- bool in_load_queue:1;
- bool in_dbus_queue:1;
- bool in_cleanup_queue:1;
- bool in_gc_queue:1;
-
- bool sent_dbus_new_signal:1;
-};
-
-#include "service.h"
-#include "timer.h"
-#include "socket.h"
-#include "target.h"
-#include "device.h"
-#include "mount.h"
-#include "automount.h"
-#include "snapshot.h"
-#include "swap.h"
-
-union Unit {
- Meta meta;
- Service service;
- Timer timer;
- Socket socket;
- Target target;
- Device device;
- Mount mount;
- Automount automount;
- Snapshot snapshot;
- Swap swap;
-};
-
-struct UnitVTable {
- const char *suffix;
-
- /* This should reset all type-specific variables. This should
- * not allocate memory, and is called with zero-initialized
- * data. It should hence only initialize variables that need
- * to be set != 0. */
- void (*init)(Unit *u);
-
- /* This should free all type-specific variables. It should be
- * idempotent. */
- void (*done)(Unit *u);
-
- /* Actually load data from disk. This may fail, and should set
- * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
- * UNIT_STUB if no configuration could be found. */
- int (*load)(Unit *u);
-
- /* If a a lot of units got created via enumerate(), this is
- * where to actually set the state and call unit_notify(). */
- int (*coldplug)(Unit *u);
-
- void (*dump)(Unit *u, FILE *f, const char *prefix);
-
- int (*start)(Unit *u);
- int (*stop)(Unit *u);
- int (*reload)(Unit *u);
-
- bool (*can_reload)(Unit *u);
-
- /* Write all data that cannot be restored from other sources
- * away using unit_serialize_item() */
- int (*serialize)(Unit *u, FILE *f, FDSet *fds);
-
- /* Restore one item from the serialization */
- int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
-
- /* Boils down the more complex internal state of this unit to
- * a simpler one that the engine can understand */
- UnitActiveState (*active_state)(Unit *u);
-
- /* Returns the substate specific to this unit type as
- * string. This is purely information so that we can give the
- * user a more finegrained explanation in which actual state a
- * unit is in. */
- const char* (*sub_state_to_string)(Unit *u);
-
- /* Return true when there is reason to keep this entry around
- * even nothing references it and it isn't active in any
- * way */
- bool (*check_gc)(Unit *u);
-
- /* Return true when this unit is suitable for snapshotting */
- bool (*check_snapshot)(Unit *u);
-
- void (*fd_event)(Unit *u, int fd, uint32_t events, Watch *w);
- void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
- void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
-
- /* Called whenever any of the cgroups this unit watches for
- * ran empty */
- void (*cgroup_notify_empty)(Unit *u);
-
- /* Called whenever a name thus Unit registered for comes or
- * goes away. */
- void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
-
- /* Called whenever a bus PID lookup finishes */
- void (*bus_query_pid_done)(Unit *u, const char *name, pid_t pid);
-
- /* Called for each message received on the bus */
- DBusHandlerResult (*bus_message_handler)(Unit *u, DBusMessage *message);
-
- /* This is called for each unit type and should be used to
- * enumerate existing devices and load them. However,
- * everything that is loaded here should still stay in
- * inactive state. It is the job of the coldplug() call above
- * to put the units into the initial state. */
- int (*enumerate)(Manager *m);
-
- /* Type specific cleanups. */
- void (*shutdown)(Manager *m);
-
- /* Can units of this type have multiple names? */
- bool no_alias:1;
-
- /* If true units of this types can never have "Requires"
- * dependencies, because state changes can only be observed,
- * not triggered */
- bool no_requires:1;
-
- /* Instances make no sense for this type */
- bool no_instances:1;
-
- /* Exclude this type from snapshots */
- bool no_snapshots:1;
-
- /* Exclude from automatic gc */
- bool no_gc:1;
-
- /* Exclude from isolation requests */
- bool no_isolate:1;
-};
-
-extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
-
-#define UNIT_VTABLE(u) unit_vtable[(u)->meta.type]
-
-/* For casting a unit into the various unit types */
-#define DEFINE_CAST(UPPERCASE, MixedCase) \
- static inline MixedCase* UPPERCASE(Unit *u) { \
- if (!u || u->meta.type != UNIT_##UPPERCASE) \
- return NULL; \
- \
- return (MixedCase*) u; \
- }
-
-/* For casting the various unit types into a unit */
-#define UNIT(u) ((Unit*) (u))
-
-DEFINE_CAST(SOCKET, Socket);
-DEFINE_CAST(TIMER, Timer);
-DEFINE_CAST(SERVICE, Service);
-DEFINE_CAST(TARGET, Target);
-DEFINE_CAST(DEVICE, Device);
-DEFINE_CAST(MOUNT, Mount);
-DEFINE_CAST(AUTOMOUNT, Automount);
-DEFINE_CAST(SNAPSHOT, Snapshot);
-DEFINE_CAST(SWAP, Swap);
-
-Unit *unit_new(Manager *m);
-void unit_free(Unit *u);
-
-int unit_add_name(Unit *u, const char *name);
-
-int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference);
-int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
-int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
-
-int unit_add_exec_dependencies(Unit *u, ExecContext *c);
-
-int unit_add_cgroup(Unit *u, CGroupBonding *b);
-int unit_add_cgroup_from_text(Unit *u, const char *name);
-int unit_add_default_cgroup(Unit *u);
-CGroupBonding* unit_get_default_cgroup(Unit *u);
-
-int unit_choose_id(Unit *u, const char *name);
-int unit_set_description(Unit *u, const char *description);
-
-bool unit_check_gc(Unit *u);
-
-void unit_add_to_load_queue(Unit *u);
-void unit_add_to_dbus_queue(Unit *u);
-void unit_add_to_cleanup_queue(Unit *u);
-void unit_add_to_gc_queue(Unit *u);
-
-int unit_merge(Unit *u, Unit *other);
-int unit_merge_by_name(Unit *u, const char *other);
-
-Unit *unit_follow_merge(Unit *u);
-
-int unit_load_fragment_and_dropin(Unit *u);
-int unit_load_fragment_and_dropin_optional(Unit *u);
-int unit_load_nop(Unit *u);
-int unit_load(Unit *unit);
-
-const char *unit_description(Unit *u);
-
-bool unit_has_name(Unit *u, const char *name);
-
-UnitActiveState unit_active_state(Unit *u);
-
-const char* unit_sub_state_to_string(Unit *u);
-
-void unit_dump(Unit *u, FILE *f, const char *prefix);
-
-bool unit_can_reload(Unit *u);
-bool unit_can_start(Unit *u);
-
-int unit_start(Unit *u);
-int unit_stop(Unit *u);
-int unit_reload(Unit *u);
-
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns);
-
-int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w);
-void unit_unwatch_fd(Unit *u, Watch *w);
-
-int unit_watch_pid(Unit *u, pid_t pid);
-void unit_unwatch_pid(Unit *u, pid_t pid);
-
-int unit_watch_timer(Unit *u, usec_t delay, Watch *w);
-void unit_unwatch_timer(Unit *u, Watch *w);
-
-int unit_watch_bus_name(Unit *u, const char *name);
-void unit_unwatch_bus_name(Unit *u, const char *name);
-
-bool unit_job_is_applicable(Unit *u, JobType j);
-
-int set_unit_path(const char *p);
-
-char *unit_dbus_path(Unit *u);
-
-int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
-int unit_get_related_unit(Unit *u, const char *type, Unit **_found);
-
-char *unit_name_printf(Unit *u, const char* text);
-char *unit_full_printf(Unit *u, const char *text);
-char **unit_full_printf_strv(Unit *u, char **l);
-
-bool unit_can_serialize(Unit *u);
-int unit_serialize(Unit *u, FILE *f, FDSet *fds);
-void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_attr(4,5);
-void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
-int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
-
-int unit_add_node_link(Unit *u, const char *what, bool wants);
-
-const char *unit_type_to_string(UnitType i);
-UnitType unit_type_from_string(const char *s);
-
-const char *unit_load_state_to_string(UnitLoadState i);
-UnitLoadState unit_load_state_from_string(const char *s);
-
-const char *unit_active_state_to_string(UnitActiveState i);
-UnitActiveState unit_active_state_from_string(const char *s);
-
-const char *unit_dependency_to_string(UnitDependency i);
-UnitDependency unit_dependency_from_string(const char *s);
-
-const char *kill_mode_to_string(KillMode k);
-KillMode kill_mode_from_string(const char *s);
-
-#endif
~ianmdlvl / elogind.git / blobdiff