X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Funit.h;h=756f465da339fe7310044da24d712ed4dbcb00c5;hp=605fa3774d8944ec4c27a0d5514dcc408efecfa7;hb=bb242b7b5277f5db4a01be905f26eccd382ff1e0;hpb=6daf4f9001d87da9e92c04ff606b454c209f0951 diff --git a/src/unit.h b/src/unit.h index 605fa3774..756f465da 100644 --- a/src/unit.h +++ b/src/unit.h @@ -25,22 +25,21 @@ #include #include -typedef union Unit Unit; -typedef struct Meta Meta; +typedef struct Unit Unit; typedef struct UnitVTable UnitVTable; typedef enum UnitType UnitType; typedef enum UnitLoadState UnitLoadState; typedef enum UnitActiveState UnitActiveState; typedef enum UnitDependency UnitDependency; +typedef struct UnitRef UnitRef; #include "set.h" #include "util.h" #include "list.h" #include "socket-util.h" #include "execute.h" - -#define DEFAULT_TIMEOUT_USEC (60*USEC_PER_SEC) -#define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC) +#include "condition.h" +#include "install.h" enum UnitType { UNIT_SERVICE = 0, @@ -101,11 +100,13 @@ enum UnitDependency { UNIT_REQUISITE, UNIT_REQUISITE_OVERRIDABLE, UNIT_WANTS, + UNIT_BIND_TO, /* 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_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 'bind_to' */ /* Negative dependencies */ UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicted_by' */ @@ -118,6 +119,14 @@ enum UnitDependency { /* On Failure */ UNIT_ON_FAILURE, + /* Triggers (i.e. a socket triggers a service) */ + UNIT_TRIGGERS, + UNIT_TRIGGERED_BY, + + /* Propagate reloads */ + UNIT_PROPAGATE_RELOAD_TO, + UNIT_PROPAGATE_RELOAD_FROM, + /* Reference information for GC logic */ UNIT_REFERENCES, /* Inverse of 'references' is 'referenced_by' */ UNIT_REFERENCED_BY, @@ -129,8 +138,9 @@ enum UnitDependency { #include "manager.h" #include "job.h" #include "cgroup.h" +#include "cgroup-attr.h" -struct Meta { +struct Unit { Manager *manager; UnitType type; @@ -154,6 +164,14 @@ struct Meta { usec_t job_timeout; + /* References to this */ + LIST_HEAD(UnitRef, refs); + + /* Conditions to check */ + LIST_HEAD(Condition, conditions); + + dual_timestamp condition_timestamp; + dual_timestamp inactive_exit_timestamp; dual_timestamp active_enter_timestamp; dual_timestamp active_exit_timestamp; @@ -161,21 +179,22 @@ struct Meta { /* Counterparts in the cgroup filesystem */ CGroupBonding *cgroup_bondings; + CGroupAttribute *cgroup_attributes; /* Per type list */ - LIST_FIELDS(Meta, units_per_type); + LIST_FIELDS(Unit, units_by_type); /* Load queue */ - LIST_FIELDS(Meta, load_queue); + LIST_FIELDS(Unit, load_queue); /* D-Bus queue */ - LIST_FIELDS(Meta, dbus_queue); + LIST_FIELDS(Unit, dbus_queue); /* Cleanup queue */ - LIST_FIELDS(Meta, cleanup_queue); + LIST_FIELDS(Unit, cleanup_queue); /* GC queue */ - LIST_FIELDS(Meta, gc_queue); + LIST_FIELDS(Unit, gc_queue); /* Used during GC sweeps */ unsigned gc_marker; @@ -187,18 +206,15 @@ struct Meta { /* Error code when we didn't manage to load the unit (negative) */ int load_error; - /* If we go down, pull down everything that depends on us, too */ - bool recursive_stop; + /* Cached unit file state */ + UnitFileState unit_file_state; /* Garbage collect us we nobody wants or requires us anymore */ bool stop_when_unneeded; - /* Create default depedencies */ + /* Create default dependencies */ bool default_dependencies; - /* Bring up this unit even if a dependency fails to start */ - bool ignore_dependency_failure; - /* Refuse manual starting, allow starting only indirectly via dependency. */ bool refuse_manual_start; @@ -208,6 +224,18 @@ struct Meta { /* Allow isolation requests */ bool allow_isolate; + /* Isolate OnFailure unit */ + bool on_failure_isolate; + + /* Ignore this unit when isolating */ + bool ignore_on_isolate; + + /* Ignore this unit when snapshotting */ + bool ignore_on_snapshot; + + /* Did the last condition check suceed? */ + bool condition_result; + bool in_load_queue:1; bool in_dbus_queue:1; bool in_cleanup_queue:1; @@ -220,6 +248,15 @@ struct Meta { 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); +}; + #include "service.h" #include "timer.h" #include "socket.h" @@ -231,23 +268,16 @@ struct Meta { #include "swap.h" #include "path.h" -union Unit { - Meta meta; - Service service; - Timer timer; - Socket socket; - Target target; - Device device; - Mount mount; - Automount automount; - Snapshot snapshot; - Swap swap; - Path path; -}; - struct UnitVTable { const char *suffix; + /* How much memory does an object of this unit type need */ + size_t object_size; + + /* Config file sections this unit type understands, separated + * by NUL chars */ + const char *sections; + /* 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 @@ -273,6 +303,8 @@ struct UnitVTable { int (*stop)(Unit *u); int (*reload)(Unit *u); + int (*kill)(Unit *u, KillWho w, KillMode m, int signo, DBusError *error); + bool (*can_reload)(Unit *u); /* Write all data that cannot be restored from other sources @@ -288,7 +320,7 @@ struct UnitVTable { /* 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 + * user a more fine grained explanation in which actual state a * unit is in. */ const char* (*sub_state_to_string)(Unit *u); @@ -304,6 +336,9 @@ struct UnitVTable { void (*sigchld_event)(Unit *u, pid_t pid, int code, int status); void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w); + /* Check whether unit needs a daemon reload */ + bool (*need_daemon_reload)(Unit *u); + /* Reset failed state if we are in failed state */ void (*reset_failed)(Unit *u); @@ -327,6 +362,9 @@ struct UnitVTable { /* 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); + /* 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 @@ -348,42 +386,31 @@ struct UnitVTable { /* 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 stopping on isolation requests */ - bool no_isolate:1; - /* Show status updates on the console */ bool show_status:1; }; extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX]; -#define UNIT_VTABLE(u) unit_vtable[(u)->meta.type] +#define UNIT_VTABLE(u) unit_vtable[(u)->type] /* For casting a unit into the various unit types */ #define DEFINE_CAST(UPPERCASE, MixedCase) \ static inline MixedCase* UPPERCASE(Unit *u) { \ - if (_unlikely_(!u || u->meta.type != UNIT_##UPPERCASE)) \ + if (_unlikely_(!u || u->type != UNIT_##UPPERCASE)) \ return NULL; \ \ return (MixedCase*) u; \ } /* For casting the various unit types into a unit */ -#define UNIT(u) ((Unit*) (&(u)->meta)) +#define UNIT(u) (&(u)->meta) DEFINE_CAST(SOCKET, Socket); DEFINE_CAST(TIMER, Timer); @@ -396,7 +423,7 @@ DEFINE_CAST(SNAPSHOT, Snapshot); DEFINE_CAST(SWAP, Swap); DEFINE_CAST(PATH, Path); -Unit *unit_new(Manager *m); +Unit *unit_new(Manager *m, size_t size); void unit_free(Unit *u); int unit_add_name(Unit *u, const char *name); @@ -414,8 +441,9 @@ 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); +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); @@ -454,7 +482,9 @@ 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_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *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); @@ -491,7 +521,7 @@ int unit_add_node_link(Unit *u, const char *what, bool wants); int unit_coldplug(Unit *u); -void unit_status_printf(Unit *u, const char *format, ...); +void unit_status_printf(Unit *u, const char *status, const char *format, ...); bool unit_need_daemon_reload(Unit *u); @@ -504,9 +534,22 @@ bool unit_pending_active(Unit *u); int unit_add_default_target_dependency(Unit *u, Unit *target); +int unit_following_set(Unit *u, Set **s); + UnitType unit_name_to_type(const char *n); bool unit_name_is_valid(const char *n, bool template_ok); +void unit_trigger_on_failure(Unit *u); + +bool unit_condition_test(Unit *u); + +UnitFileState unit_get_unit_file_state(Unit *u); + +Unit* unit_ref_set(UnitRef *ref, Unit *u); +void unit_ref_unset(UnitRef *ref); + +#define UNIT_DEREF(ref) ((ref).unit) + const char *unit_load_state_to_string(UnitLoadState i); UnitLoadState unit_load_state_from_string(const char *s); @@ -516,7 +559,4 @@ 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