UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicts' */
/* Order */
- UNIT_BEFORE, /* inverse of before is after and vice versa */
+ 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
};
/* Counterparts in the cgroup filesystem */
CGroupBonding *cgroup_bondings;
- /* Load queue */
- LIST_FIELDS(Meta, load_queue);
-
/* 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;
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;
};
* 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);
/* 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];
int unit_add_name(Unit *u, const char *name);
-int unit_add_dependency(Unit *u, UnitDependency d, Unit *other);
-int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename);
-int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *filename);
+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_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);