#include <stdbool.h>
#include <stdlib.h>
+#include <unistd.h>
typedef struct Unit Unit;
typedef struct UnitVTable UnitVTable;
typedef enum UnitActiveState UnitActiveState;
-typedef enum UnitDependency UnitDependency;
typedef struct UnitRef UnitRef;
typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
+#include "sd-event.h"
#include "set.h"
#include "util.h"
#include "list.h"
#include "socket-util.h"
#include "execute.h"
+#include "cgroup.h"
#include "condition.h"
#include "install.h"
#include "unit-name.h"
return t == UNIT_INACTIVE || t == UNIT_FAILED;
}
-enum UnitDependency {
- /* Positive dependencies */
- UNIT_REQUIRES,
- UNIT_REQUIRES_OVERRIDABLE,
- UNIT_REQUISITE,
- UNIT_REQUISITE_OVERRIDABLE,
- UNIT_WANTS,
- UNIT_BINDS_TO,
- UNIT_PART_OF,
-
- /* Inverse of the above */
- UNIT_REQUIRED_BY, /* inverse of 'requires' and 'requisite' is 'required_by' */
- UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'requires_overridable' and 'requisite_overridable' is 'soft_required_by' */
- UNIT_WANTED_BY, /* inverse of 'wants' */
- UNIT_BOUND_BY, /* inverse of 'binds_to' */
- UNIT_CONSISTS_OF, /* inverse of 'part_of' */
-
- /* Negative dependencies */
- UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicted_by' */
- UNIT_CONFLICTED_BY,
-
- /* Order */
- UNIT_BEFORE, /* inverse of 'before' is 'after' and vice versa */
- UNIT_AFTER,
-
- /* On Failure */
- UNIT_ON_FAILURE,
-
- /* Triggers (i.e. a socket triggers a service) */
- UNIT_TRIGGERS,
- UNIT_TRIGGERED_BY,
-
- /* Propagate reloads */
- UNIT_PROPAGATES_RELOAD_TO,
- UNIT_RELOAD_PROPAGATED_FROM,
-
- /* 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"
-#include "cgroup-attr.h"
+
+struct UnitRef {
+ /* Keeps tracks of references to a unit. This is useful so
+ * that we can merge two units if necessary and correct all
+ * references to them */
+
+ Unit* unit;
+ LIST_FIELDS(UnitRef, refs);
+};
struct Unit {
Manager *manager;
char *fragment_path; /* if loaded from a config file this is the primary path to it */
char *source_path; /* if converted, the source file */
+ char **dropin_paths;
usec_t fragment_mtime;
usec_t source_mtime;
+ usec_t dropin_mtime;
/* If there is something to do with this unit, then this is the installed job for it */
Job *job;
dual_timestamp inactive_enter_timestamp;
/* Counterparts in the cgroup filesystem */
- CGroupBonding *cgroup_bondings;
- CGroupAttribute *cgroup_attributes;
+ char *cgroup_path;
+ CGroupControllerMask cgroup_realized_mask;
+ CGroupControllerMask cgroup_subtree_mask;
+ CGroupControllerMask cgroup_members_mask;
+
+ UnitRef slice;
/* Per type list */
LIST_FIELDS(Unit, units_by_type);
/* GC queue */
LIST_FIELDS(Unit, gc_queue);
+ /* CGroup realize members queue */
+ LIST_FIELDS(Unit, cgroup_queue);
+
+ /* PIDs we keep an eye on. Note that a unit might have many
+ * more, but these are the ones we care enough about to
+ * process SIGCHLD for */
+ Set *pids;
+
/* Used during GC sweeps */
unsigned gc_marker;
/* Allow isolation requests */
bool allow_isolate;
- /* Isolate OnFailure unit */
- bool on_failure_isolate;
+ /* How to start OnFailure units */
+ JobMode on_failure_job_mode;
/* Ignore this unit when isolating */
bool ignore_on_isolate;
/* Did the last condition check succeed? */
bool condition_result;
+ /* Is this a transient unit? */
+ bool transient;
+
bool in_load_queue:1;
bool in_dbus_queue:1;
bool in_cleanup_queue:1;
bool in_gc_queue:1;
+ bool in_cgroup_queue:1;
bool sent_dbus_new_signal:1;
bool no_gc:1;
bool in_audit:1;
-};
-
-struct UnitRef {
- /* Keeps tracks of references to a unit. This is useful so
- * that we can merge two units if necessary and correct all
- * references to them */
- Unit* unit;
- LIST_FIELDS(UnitRef, refs);
+ bool cgroup_realized:1;
+ bool cgroup_members_mask_valid:1;
+ bool cgroup_subtree_mask_valid:1;
};
struct UnitStatusMessageFormats {
const char *finished_stop_job[_JOB_RESULT_MAX];
};
+typedef enum UnitSetPropertiesMode {
+ UNIT_CHECK = 0,
+ UNIT_RUNTIME = 1,
+ UNIT_PERSISTENT = 2,
+} UnitSetPropertiesMode;
+
#include "service.h"
-#include "timer.h"
#include "socket.h"
+#include "busname.h"
#include "target.h"
+#include "snapshot.h"
#include "device.h"
#include "mount.h"
#include "automount.h"
-#include "snapshot.h"
#include "swap.h"
+#include "timer.h"
#include "path.h"
+#include "slice.h"
+#include "scope.h"
struct UnitVTable {
/* How much memory does an object of this unit type need */
* ExecContext is found, if the unit type has that */
size_t exec_context_offset;
+ /* If greater than 0, the offset into the object where
+ * CGroupContext is found, if the unit type has that */
+ size_t cgroup_context_offset;
+
+ /* If greater than 0, the offset into the object where
+ * KillContext is found, if the unit type has that */
+ size_t kill_context_offset;
+
+ /* If greater than 0, the offset into the object where the
+ * pointer to ExecRuntime is found, if the unit type has
+ * that */
+ size_t exec_runtime_offset;
+
+ /* The name of the configuration file section with the private settings of this unit*/
+ const char *private_section;
+
/* Config file sections this unit type understands, separated
* by NUL chars */
const char *sections;
int (*stop)(Unit *u);
int (*reload)(Unit *u);
- int (*kill)(Unit *u, KillWho w, int signo, DBusError *error);
+ int (*kill)(Unit *u, KillWho w, int signo, sd_bus_error *error);
bool (*can_reload)(Unit *u);
/* Restore one item from the serialization */
int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
+ /* Try to match up fds with what we need for this unit */
+ int (*distribute_fds)(Unit *u, 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);
/* 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);
+ /* Invoked on every child that died */
void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
- void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
/* Reset failed state if we are in failed state */
void (*reset_failed)(Unit *u);
/* Called whenever any of the cgroups this unit watches for
* ran empty */
- void (*cgroup_notify_empty)(Unit *u);
+ void (*notify_cgroup_empty)(Unit *u);
/* Called whenever a process of this unit sends us a message */
void (*notify_message)(Unit *u, pid_t pid, char **tags);
- /* Called whenever a name thus Unit registered for comes or
+ /* Called whenever a name this 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 property that is being set */
+ int (*bus_set_property)(Unit *u, const char *name, sd_bus_message *message, UnitSetPropertiesMode mode, sd_bus_error *error);
- /* Called for each message received on the bus */
- DBusHandlerResult (*bus_message_handler)(Unit *u, DBusConnection *c, DBusMessage *message);
+ /* Called after at least one property got changed to apply the necessary change */
+ int (*bus_commit_properties)(Unit *u);
/* Return the unit this unit is following */
Unit *(*following)(Unit *u);
/* Return the set of units that are following each other */
int (*following_set)(Unit *u, Set **s);
+ /* Invoked each time a unit this unit is triggering changes
+ * state or gains/loses a job */
+ void (*trigger_notify)(Unit *u, Unit *trigger);
+
/* Called whenever CLOCK_REALTIME made a jump */
void (*time_change)(Unit *u);
+ int (*get_timeout)(Unit *u, uint64_t *timeout);
+
/* 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);
- /* When sending out PropertiesChanged signal, which properties
- * shall be invalidated? This is a NUL separated list of
- * strings, to minimize relocations a little. */
- const char *bus_invalidating_properties;
-
/* The interface name */
const char *bus_interface;
+ /* The bus vtable */
+ const sd_bus_vtable *bus_vtable;
+
+ /* The strings to print in status messages */
UnitStatusMessageFormats status_message_formats;
/* Can units of this type have multiple names? */
/* Exclude from automatic gc */
bool no_gc:1;
+
+ /* True if transient units of this type are OK */
+ bool can_transient:1;
};
extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
/* For casting the various unit types into a unit */
#define UNIT(u) (&(u)->meta)
-DEFINE_CAST(SOCKET, Socket);
-DEFINE_CAST(TIMER, Timer);
+#define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS]))
+
DEFINE_CAST(SERVICE, Service);
+DEFINE_CAST(SOCKET, Socket);
+DEFINE_CAST(BUSNAME, BusName);
DEFINE_CAST(TARGET, Target);
+DEFINE_CAST(SNAPSHOT, Snapshot);
DEFINE_CAST(DEVICE, Device);
DEFINE_CAST(MOUNT, Mount);
DEFINE_CAST(AUTOMOUNT, Automount);
-DEFINE_CAST(SNAPSHOT, Snapshot);
DEFINE_CAST(SWAP, Swap);
+DEFINE_CAST(TIMER, Timer);
DEFINE_CAST(PATH, Path);
+DEFINE_CAST(SLICE, Slice);
+DEFINE_CAST(SCOPE, Scope);
Unit *unit_new(Manager *m, size_t size);
void unit_free(Unit *u);
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_cgroups(Unit *u);
-CGroupBonding* unit_get_default_cgroup(Unit *u);
-int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback);
-
int unit_choose_id(Unit *u, const char *name);
int unit_set_description(Unit *u, const char *description);
int unit_merge(Unit *u, Unit *other);
int unit_merge_by_name(Unit *u, const char *other);
-Unit *unit_follow_merge(Unit *u);
+Unit *unit_follow_merge(Unit *u) _pure_;
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_description(Unit *u);
+int unit_add_default_slice(Unit *u, CGroupContext *c);
+
+const char *unit_description(Unit *u) _pure_;
bool unit_has_name(Unit *u, const char *name);
void unit_dump(Unit *u, FILE *f, const char *prefix);
-bool unit_can_reload(Unit *u);
-bool unit_can_start(Unit *u);
-bool unit_can_isolate(Unit *u);
+bool unit_can_reload(Unit *u) _pure_;
+bool unit_can_start(Unit *u) _pure_;
+bool unit_can_isolate(Unit *u) _pure_;
int unit_start(Unit *u);
int unit_stop(Unit *u);
int unit_reload(Unit *u);
-int unit_kill(Unit *u, KillWho w, int signo, DBusError *error);
+int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error);
+int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, sd_bus_error *error);
void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
-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_all_pids(Unit *u);
+void unit_unwatch_all_pids(Unit *u);
-int unit_watch_timer(Unit *u, clockid_t, bool relative, usec_t usec, Watch *w);
-void unit_unwatch_timer(Unit *u, Watch *w);
+void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2);
int unit_watch_bus_name(Unit *u, const char *name);
void unit_unwatch_bus_name(Unit *u, const char *name);
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);
-bool unit_can_serialize(Unit *u);
+bool unit_can_serialize(Unit *u) _pure_;
int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
-void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_attr_(4,5);
+void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(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_coldplug(Unit *u);
-void unit_status_printf(Unit *u, const char *status, const char *format, ...);
+void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
bool unit_need_daemon_reload(Unit *u);
void unit_reset_failed(Unit *u);
Unit *unit_following(Unit *u);
+int unit_following_set(Unit *u, Set **s);
+
+const char *unit_slice_name(Unit *u);
-bool unit_pending_inactive(Unit *u);
-bool unit_pending_active(Unit *u);
+bool unit_stop_pending(Unit *u) _pure_;
+bool unit_inactive_or_pending(Unit *u) _pure_;
+bool unit_active_or_pending(Unit *u);
int unit_add_default_target_dependency(Unit *u, Unit *target);
char *unit_default_cgroup_path(Unit *u);
-int unit_following_set(Unit *u, Set **s);
-
-void unit_trigger_on_failure(Unit *u);
-
-bool unit_condition_test(Unit *u);
+void unit_start_on_failure(Unit *u);
+void unit_trigger_notify(Unit *u);
UnitFileState unit_get_unit_file_state(Unit *u);
void unit_ref_unset(UnitRef *ref);
#define UNIT_DEREF(ref) ((ref).unit)
+#define UNIT_ISSET(ref) (!!(ref).unit)
+
+int unit_patch_contexts(Unit *u);
+
+ExecContext *unit_get_exec_context(Unit *u) _pure_;
+KillContext *unit_get_kill_context(Unit *u) _pure_;
+CGroupContext *unit_get_cgroup_context(Unit *u) _pure_;
+
+ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_;
+
+int unit_setup_exec_runtime(Unit *u);
+
+int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
+int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
+
+int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
+int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
+
+int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name);
+
+int unit_kill_context(Unit *u, KillContext *c, bool sigkill, pid_t main_pid, pid_t control_pid, bool main_pid_alien);
+
+int unit_make_transient(Unit *u);
-int unit_add_one_mount_link(Unit *u, Mount *m);
-int unit_add_mount_links(Unit *u);
+int unit_require_mounts_for(Unit *u, const char *path);
-int unit_exec_context_defaults(Unit *u, ExecContext *c);
+const char *unit_active_state_to_string(UnitActiveState i) _const_;
+UnitActiveState unit_active_state_from_string(const char *s) _pure_;
-ExecContext *unit_get_exec_context(Unit *u);
+/* Macros which append UNIT= or USER_UNIT= to the message */
-const char *unit_active_state_to_string(UnitActiveState i);
-UnitActiveState unit_active_state_from_string(const char *s);
+#define log_full_unit(level, unit, ...) log_meta_object(level, __FILE__, __LINE__, __func__, getpid() == 1 ? "UNIT=" : "USER_UNIT=", unit, __VA_ARGS__)
+#define log_debug_unit(unit, ...) log_full_unit(LOG_DEBUG, unit, __VA_ARGS__)
+#define log_info_unit(unit, ...) log_full_unit(LOG_INFO, unit, __VA_ARGS__)
+#define log_notice_unit(unit, ...) log_full_unit(LOG_NOTICE, unit, __VA_ARGS__)
+#define log_warning_unit(unit, ...) log_full_unit(LOG_WARNING, unit, __VA_ARGS__)
+#define log_error_unit(unit, ...) log_full_unit(LOG_ERR, unit, __VA_ARGS__)
-const char *unit_dependency_to_string(UnitDependency i);
-UnitDependency unit_dependency_from_string(const char *s);
+#define log_struct_unit(level, unit, ...) log_struct(level, getpid() == 1 ? "UNIT=%s" : "USER_UNIT=%s", unit, __VA_ARGS__)
~ianmdlvl / elogind.git / blobdiff