Merge pull request #1024 from poettering/sd-bus-explicit

sd-bus: introduce new SD_BUS_VTABLE_PROPERTY_EXPLICIT flag

5 files changed, 11 insertions, 2 deletions

diff --git a/src/libsystemd/sd-bus/bus-introspect.c b/src/libsystemd/sd-bus/bus-introspect.c
index c2233d0cf3..3107d00092 100644
--- a/src/libsystemd/sd-bus/bus-introspect.c
+++ b/src/libsystemd/sd-bus/bus-introspect.c
@@ -81,6 +81,9 @@ static void introspect_write_flags(struct introspect *i, int type, int flags) {
                 fputs("   <annotation name=\"org.freedesktop.DBus.Method.NoReply\" value=\"true\"/>\n", i->f);
 
         if (type == _SD_BUS_VTABLE_PROPERTY || type == _SD_BUS_VTABLE_WRITABLE_PROPERTY) {
+                if (flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)
+                        fputs("   <annotation name=\"org.freedesktop.systemd1.Explicit\" value=\"true\"/>\n", i->f);
+
                 if (flags & SD_BUS_VTABLE_PROPERTY_CONST)
                         fputs("   <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"const\"/>\n", i->f);
                 else if (flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)
diff --git a/src/libsystemd/sd-bus/bus-objects.c b/src/libsystemd/sd-bus/bus-objects.c
index b2e617ada4..a8e9a12494 100644
--- a/src/libsystemd/sd-bus/bus-objects.c
+++ b/src/libsystemd/sd-bus/bus-objects.c
@@ -749,6 +749,9 @@ static int vtable_append_all_properties(
                 if (v->flags & SD_BUS_VTABLE_HIDDEN)
                         continue;
 
+                if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)
+                        continue;
+
                 r = vtable_append_one_property(bus, reply, path, c, v, userdata, error);
                 if (r < 0)
                         return r;
@@ -1740,8 +1743,9 @@ static int add_object_vtable_internal(
                         if (!member_name_is_valid(v->x.property.member) ||
                             !signature_is_single(v->x.property.signature, false) ||
                             !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) ||
-                            v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
+                            (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) ||
                             (!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 ||
+                            ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) ||
                             (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) {
                                 r = -EINVAL;
                                 goto fail;
diff --git a/src/libsystemd/sd-bus/test-bus-introspect.c b/src/libsystemd/sd-bus/test-bus-introspect.c
index b2caa02870..f39dedeb24 100644
--- a/src/libsystemd/sd-bus/test-bus-introspect.c
+++ b/src/libsystemd/sd-bus/test-bus-introspect.c
@@ -41,7 +41,7 @@ static const sd_bus_vtable vtable[] = {
         SD_BUS_PROPERTY("AReadOnlyDeprecatedProperty", "(ut)", prop_get, 0, SD_BUS_VTABLE_DEPRECATED),
         SD_BUS_PROPERTY("ChangingProperty", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
         SD_BUS_PROPERTY("Invalidating", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
-        SD_BUS_PROPERTY("Constant", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("Constant", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EXPLICIT),
         SD_BUS_VTABLE_END
 };
 
diff --git a/src/libsystemd/sd-bus/test-bus-objects.c b/src/libsystemd/sd-bus/test-bus-objects.c
index 6b3bfad5b6..195013f49a 100644
--- a/src/libsystemd/sd-bus/test-bus-objects.c
+++ b/src/libsystemd/sd-bus/test-bus-objects.c
@@ -217,6 +217,7 @@ static const sd_bus_vtable vtable2[] = {
         SD_BUS_PROPERTY("Value2", "s", value_handler, 10, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
         SD_BUS_PROPERTY("Value3", "s", value_handler, 10, SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("Value4", "s", value_handler, 10, 0),
+        SD_BUS_PROPERTY("AnExplicitProperty", "s", NULL, offsetof(struct context, something), SD_BUS_VTABLE_PROPERTY_EXPLICIT|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
         SD_BUS_VTABLE_END
 };
 
diff --git a/src/systemd/sd-bus-vtable.h b/src/systemd/sd-bus-vtable.h
index bb4b1eb748..c5d05a2db2 100644
--- a/src/systemd/sd-bus-vtable.h
+++ b/src/systemd/sd-bus-vtable.h
@@ -47,6 +47,7 @@ enum {
         SD_BUS_VTABLE_PROPERTY_CONST               = 1ULL << 4,
         SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE        = 1ULL << 5,
         SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION  = 1ULL << 6,
+        SD_BUS_VTABLE_PROPERTY_EXPLICIT            = 1ULL << 7,
         _SD_BUS_VTABLE_CAPABILITY_MASK             = 0xFFFFULL << 40
 };