#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 enum UnitActiveState UnitActiveState;
typedef enum UnitDependency UnitDependency;
-#include "job.h"
-#include "manager.h"
#include "set.h"
#include "util.h"
#include "list.h"
#include "socket-util.h"
#include "execute.h"
-#include "util.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_TIMER,
UNIT_SOCKET,
UNIT_TARGET,
UNIT_DEVICE,
UNIT_MOUNT,
UNIT_AUTOMOUNT,
+ UNIT_TIMER,
UNIT_SNAPSHOT,
_UNIT_TYPE_MAX,
- _UNIT_TYPE_INVALID = -1,
+ _UNIT_TYPE_INVALID = -1
};
enum UnitLoadState {
UNIT_STUB,
UNIT_LOADED,
UNIT_FAILED,
- _UNIT_LOAD_STATE_MAX
+ UNIT_MERGED,
+ _UNIT_LOAD_STATE_MAX,
+ _UNIT_LOAD_STATE_INVALID = -1
};
enum UnitActiveState {
UNIT_INACTIVE,
UNIT_ACTIVATING,
UNIT_DEACTIVATING,
- _UNIT_ACTIVE_STATE_MAX
+ _UNIT_ACTIVE_STATE_MAX,
+ _UNIT_ACTIVE_STATE_INVALID = -1
};
static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
enum UnitDependency {
/* Positive dependencies */
UNIT_REQUIRES,
- UNIT_SOFT_REQUIRES,
- UNIT_WANTS,
+ UNIT_REQUIRES_OVERRIDABLE,
UNIT_REQUISITE,
- UNIT_SOFT_REQUISITE,
+ UNIT_REQUISITE_OVERRIDABLE,
+ UNIT_WANTS,
/* Inverse of the above */
- UNIT_REQUIRED_BY, /* inverse of 'requires' and 'requisite' is 'required_by' */
- UNIT_SOFT_REQUIRED_BY, /* inverse of 'soft_requires' and 'soft_requisite' is 'soft_required_by' */
- UNIT_WANTED_BY, /* inverse of 'wants' */
+ 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' */
+ 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,
_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 *load_path; /* if loaded from a config file this is the primary path to it */
+ 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;
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 active_enter_timestamp;
usec_t active_exit_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);
+
+ /* D-Bus queue */
+ LIST_FIELDS(Meta, dbus_queue);
+
+ /* Cleanup queue */
+ LIST_FIELDS(Meta, cleanup_queue);
};
#include "service.h"
struct UnitVTable {
const char *suffix;
- int (*init)(Unit *u);
+ /* 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() */
+ void (*init)(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);
+
void (*dump)(Unit *u, FILE *f, const char *prefix);
int (*start)(Unit *u);
* 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);
+
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);
+
+ /* 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);
};
DEFINE_CAST(AUTOMOUNT, Automount);
DEFINE_CAST(SNAPSHOT, Snapshot);
-UnitType unit_name_to_type(const char *n);
-bool unit_name_is_valid(const char *n);
-char *unit_name_change_suffix(const char *n, const char *suffix);
-
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);
+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_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);
void unit_add_to_load_queue(Unit *u);
+void unit_add_to_dbus_queue(Unit *u);
+void unit_add_to_cleanup_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(Unit *unit);
-const char* unit_id(Unit *u);
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);
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);
-const char *unit_path(void);
int set_unit_path(const char *p);
-char *unit_name_escape_path(const char *path, const char *suffix);
+char *unit_dbus_path(Unit *u);
+
+int unit_load_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);
+
+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