unit: add minimal condition checker for unit startup

[elogind.git] / src / unit.h

diff --git a/src/unit.h b/src/unit.h
index a99d33ef07f4e5bea60eb532b47e9b56d33458f5..fa869ece8fb7859dbea2def6c055dd1b68632796 100644 (file)
--- a/src/unit.h
+++ b/src/unit.h
@@ -1,4 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
 #ifndef foounithfoo
 #define foounithfoo
@@ -38,8 +38,8 @@ typedef enum UnitDependency UnitDependency;
 #include "list.h"
 #include "socket-util.h"
 #include "execute.h"
+#include "condition.h"
 
-#define UNIT_NAME_MAX 256
 #define DEFAULT_TIMEOUT_USEC (60*USEC_PER_SEC)
 #define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC)
 
@@ -61,8 +61,9 @@ enum UnitType {
 enum UnitLoadState {
         UNIT_STUB,
         UNIT_LOADED,
-        UNIT_FAILED,
+        UNIT_ERROR,
         UNIT_MERGED,
+        UNIT_MASKED,
         _UNIT_LOAD_STATE_MAX,
         _UNIT_LOAD_STATE_INVALID = -1
 };
@@ -71,7 +72,7 @@ enum UnitActiveState {
         UNIT_ACTIVE,
         UNIT_RELOADING,
         UNIT_INACTIVE,
-        UNIT_MAINTENANCE,
+        UNIT_FAILED,
         UNIT_ACTIVATING,
         UNIT_DEACTIVATING,
         _UNIT_ACTIVE_STATE_MAX,
@@ -87,11 +88,11 @@ static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
 }
 
 static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
-        return t == UNIT_INACTIVE || t == UNIT_MAINTENANCE || t == UNIT_DEACTIVATING;
+        return t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_DEACTIVATING;
 }
 
-static inline bool UNIT_IS_INACTIVE_OR_MAINTENANCE(UnitActiveState t) {
-        return t == UNIT_INACTIVE || t == UNIT_MAINTENANCE;
+static inline bool UNIT_IS_INACTIVE_OR_FAILED(UnitActiveState t) {
+        return t == UNIT_INACTIVE || t == UNIT_FAILED;
 }
 
 enum UnitDependency {
@@ -154,6 +155,9 @@ struct Meta {
 
         usec_t job_timeout;
 
+        /* Conditions to check */
+        LIST_HEAD(Condition, conditions);
+
         dual_timestamp inactive_exit_timestamp;
         dual_timestamp active_enter_timestamp;
         dual_timestamp active_exit_timestamp;
@@ -184,6 +188,9 @@ struct Meta {
          * unit here, if there was a job scheduled */
         int deserialized_job; /* This is actually of type JobType */
 
+        /* 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;
 
@@ -202,6 +209,9 @@ struct Meta {
         /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */
         bool refuse_manual_stop;
 
+        /* Allow isolation requests */
+        bool allow_isolate;
+
         bool in_load_queue:1;
         bool in_dbus_queue:1;
         bool in_cleanup_queue:1;
@@ -298,8 +308,8 @@ 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);
 
-        /* Reset maintenance state if we are in maintainance state */
-        void (*reset_maintenance)(Unit *u);
+        /* 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 */
@@ -331,6 +341,14 @@ struct UnitVTable {
         /* 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;
+
         /* Can units of this type have multiple names? */
         bool no_alias:1;
 
@@ -348,7 +366,7 @@ struct UnitVTable {
         /* Exclude from automatic gc */
         bool no_gc:1;
 
-        /* Exclude from isolation requests */
+        /* Exclude from stopping on isolation requests */
         bool no_isolate:1;
 
         /* Show status updates on the console */
@@ -434,6 +452,7 @@ 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);
 
 int unit_start(Unit *u);
 int unit_stop(Unit *u);
@@ -480,10 +499,18 @@ void unit_status_printf(Unit *u, const char *format, ...);
 
 bool unit_need_daemon_reload(Unit *u);
 
-void unit_reset_maintenance(Unit *u);
+void unit_reset_failed(Unit *u);
 
 Unit *unit_following(Unit *u);
 
+bool unit_pending_inactive(Unit *u);
+bool unit_pending_active(Unit *u);
+
+int unit_add_default_target_dependency(Unit *u, Unit *target);
+
+UnitType unit_name_to_type(const char *n);
+bool unit_name_is_valid(const char *n, bool template_ok);
+
 const char *unit_load_state_to_string(UnitLoadState i);
 UnitLoadState unit_load_state_from_string(const char *s);