enum UnitType {
UNIT_SERVICE = 0,
- UNIT_TIMER,
UNIT_SOCKET,
UNIT_TARGET,
UNIT_DEVICE,
UNIT_MOUNT,
UNIT_AUTOMOUNT,
UNIT_SNAPSHOT,
+ UNIT_TIMER,
+ UNIT_SWAP,
_UNIT_TYPE_MAX,
_UNIT_TYPE_INVALID = -1
};
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
};
* the job for it */
Job *job;
- bool in_load_queue:1;
- bool in_dbus_queue:1;
- bool in_cleanup_queue:1;
- bool sent_dbus_new_signal:1;
-
- /* 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;
-
+ 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;
- /* 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;
+
+ /* 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 "mount.h"
#include "automount.h"
#include "snapshot.h"
+#include "swap.h"
union Unit {
Meta meta;
Mount mount;
Automount automount;
Snapshot snapshot;
+ Swap swap;
};
struct UnitVTable {
const char *suffix;
- /* 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;
-
/* This should reset all type-specific variables. This should
- * not allocate memory, and is either called with 0
- * initialized data, or with data left from done() */
+ * 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);
- /* This should free all type-specific variables. It should be
- * idempotent. There's no need to reset variables that deal
- * with dynamic memory/resources. */
- void (*done)(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);
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);
* 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
/* 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_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);
-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);
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);
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);
~ianmdlvl / elogind.git / blobdiff