Adding upstream version 252.22.upstream/252.22

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 311 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-slot.c b/src/libsystemd/sd-bus/bus-slot.c
new file mode 100644
index 0000000..9f28957
--- /dev/null
+++ b/src/libsystemd/sd-bus/bus-slot.c
@@ -0,0 +1,311 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "sd-bus.h"
+
+#include "alloc-util.h"
+#include "bus-control.h"
+#include "bus-objects.h"
+#include "bus-slot.h"
+#include "string-util.h"
+
+sd_bus_slot *bus_slot_allocate(
+                sd_bus *bus,
+                bool floating,
+                BusSlotType type,
+                size_t extra,
+                void *userdata) {
+
+        sd_bus_slot *slot;
+
+        assert(bus);
+
+        slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra);
+        if (!slot)
+                return NULL;
+
+        slot->n_ref = 1;
+        slot->type = type;
+        slot->bus = bus;
+        slot->floating = floating;
+        slot->userdata = userdata;
+
+        if (!floating)
+                sd_bus_ref(bus);
+
+        LIST_PREPEND(slots, bus->slots, slot);
+
+        return slot;
+}
+
+void bus_slot_disconnect(sd_bus_slot *slot, bool unref) {
+        sd_bus *bus;
+
+        assert(slot);
+
+        if (!slot->bus)
+                return;
+
+        switch (slot->type) {
+
+        case BUS_REPLY_CALLBACK:
+
+                if (slot->reply_callback.cookie != 0)
+                        ordered_hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie);
+
+                if (slot->reply_callback.timeout_usec != 0)
+                        prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
+
+                break;
+
+        case BUS_FILTER_CALLBACK:
+                slot->bus->filter_callbacks_modified = true;
+                LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback);
+                break;
+
+        case BUS_MATCH_CALLBACK:
+
+                if (slot->match_added)
+                        (void) bus_remove_match_internal(slot->bus, slot->match_callback.match_string);
+
+                if (slot->match_callback.install_slot) {
+                        bus_slot_disconnect(slot->match_callback.install_slot, true);
+                        slot->match_callback.install_slot = sd_bus_slot_unref(slot->match_callback.install_slot);
+                }
+
+                slot->bus->match_callbacks_modified = true;
+                bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback);
+
+                slot->match_callback.match_string = mfree(slot->match_callback.match_string);
+
+                break;
+
+        case BUS_NODE_CALLBACK:
+
+                if (slot->node_callback.node) {
+                        LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback);
+                        slot->bus->nodes_modified = true;
+
+                        bus_node_gc(slot->bus, slot->node_callback.node);
+                }
+
+                break;
+
+        case BUS_NODE_ENUMERATOR:
+
+                if (slot->node_enumerator.node) {
+                        LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator);
+                        slot->bus->nodes_modified = true;
+
+                        bus_node_gc(slot->bus, slot->node_enumerator.node);
+                }
+
+                break;
+
+        case BUS_NODE_OBJECT_MANAGER:
+
+                if (slot->node_object_manager.node) {
+                        LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager);
+                        slot->bus->nodes_modified = true;
+
+                        bus_node_gc(slot->bus, slot->node_object_manager.node);
+                }
+
+                break;
+
+        case BUS_NODE_VTABLE:
+
+                if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) {
+                        const sd_bus_vtable *v;
+
+                        for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v = bus_vtable_next(slot->node_vtable.vtable, v)) {
+                                struct vtable_member *x = NULL;
+
+                                switch (v->type) {
+
+                                case _SD_BUS_VTABLE_METHOD: {
+                                        struct vtable_member key;
+
+                                        key.path = slot->node_vtable.node->path;
+                                        key.interface = slot->node_vtable.interface;
+                                        key.member = v->x.method.member;
+
+                                        x = hashmap_remove(slot->bus->vtable_methods, &key);
+                                        break;
+                                }
+
+                                case _SD_BUS_VTABLE_PROPERTY:
+                                case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
+                                        struct vtable_member key;
+
+                                        key.path = slot->node_vtable.node->path;
+                                        key.interface = slot->node_vtable.interface;
+                                        key.member = v->x.method.member;
+
+                                        x = hashmap_remove(slot->bus->vtable_properties, &key);
+                                        break;
+                                }}
+
+                                free(x);
+                        }
+                }
+
+                slot->node_vtable.interface = mfree(slot->node_vtable.interface);
+
+                if (slot->node_vtable.node) {
+                        LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable);
+                        slot->bus->nodes_modified = true;
+
+                        bus_node_gc(slot->bus, slot->node_vtable.node);
+                }
+
+                break;
+
+        default:
+                assert_not_reached();
+        }
+
+        bus = slot->bus;
+
+        slot->type = _BUS_SLOT_INVALID;
+        slot->bus = NULL;
+        LIST_REMOVE(slots, bus->slots, slot);
+
+        if (!slot->floating)
+                sd_bus_unref(bus);
+        else if (unref)
+                sd_bus_slot_unref(slot);
+}
+
+static sd_bus_slot* bus_slot_free(sd_bus_slot *slot) {
+        assert(slot);
+
+        bus_slot_disconnect(slot, false);
+
+        if (slot->destroy_callback)
+                slot->destroy_callback(slot->userdata);
+
+        free(slot->description);
+        return mfree(slot);
+}
+
+DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus_slot, sd_bus_slot, bus_slot_free);
+
+_public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) {
+        assert_return(slot, NULL);
+
+        return slot->bus;
+}
+
+_public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) {
+        assert_return(slot, NULL);
+
+        return slot->userdata;
+}
+
+_public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) {
+        void *ret;
+
+        assert_return(slot, NULL);
+
+        ret = slot->userdata;
+        slot->userdata = userdata;
+
+        return ret;
+}
+
+_public_ int sd_bus_slot_set_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t callback) {
+        assert_return(slot, -EINVAL);
+
+        slot->destroy_callback = callback;
+        return 0;
+}
+
+_public_ int sd_bus_slot_get_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t *callback) {
+        assert_return(slot, -EINVAL);
+
+        if (callback)
+                *callback = slot->destroy_callback;
+
+        return !!slot->destroy_callback;
+}
+
+_public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) {
+        assert_return(slot, NULL);
+        assert_return(slot->type >= 0, NULL);
+
+        if (slot->bus->current_slot != slot)
+                return NULL;
+
+        return slot->bus->current_message;
+}
+
+_public_ sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot) {
+        assert_return(slot, NULL);
+        assert_return(slot->type >= 0, NULL);
+
+        if (slot->bus->current_slot != slot)
+                return NULL;
+
+        return slot->bus->current_handler;
+}
+
+_public_ void* sd_bus_slot_get_current_userdata(sd_bus_slot *slot) {
+        assert_return(slot, NULL);
+        assert_return(slot->type >= 0, NULL);
+
+        if (slot->bus->current_slot != slot)
+                return NULL;
+
+        return slot->bus->current_userdata;
+}
+
+_public_ int sd_bus_slot_get_floating(sd_bus_slot *slot) {
+        assert_return(slot, -EINVAL);
+
+        return slot->floating;
+}
+
+_public_ int sd_bus_slot_set_floating(sd_bus_slot *slot, int b) {
+        assert_return(slot, -EINVAL);
+
+        if (slot->floating == !!b)
+                return 0;
+
+        if (!slot->bus) /* already disconnected slots can't be reconnected */
+                return -ESTALE;
+
+        slot->floating = b;
+
+        /* When a slot is "floating" then the bus references the slot. Otherwise the slot references the bus. Hence,
+         * when we move from one to the other, let's increase one reference and decrease the other. */
+
+        if (b) {
+                sd_bus_slot_ref(slot);
+                sd_bus_unref(slot->bus);
+        } else {
+                sd_bus_ref(slot->bus);
+                sd_bus_slot_unref(slot);
+        }
+
+        return 1;
+}
+
+_public_ int sd_bus_slot_set_description(sd_bus_slot *slot, const char *description) {
+        assert_return(slot, -EINVAL);
+
+        return free_and_strdup(&slot->description, description);
+}
+
+_public_ int sd_bus_slot_get_description(sd_bus_slot *slot, const char **description) {
+        assert_return(slot, -EINVAL);
+        assert_return(description, -EINVAL);
+
+        if (slot->description)
+                *description = slot->description;
+        else if (slot->type == BUS_MATCH_CALLBACK)
+                *description = slot->match_callback.match_string;
+        else
+                return -ENXIO;
+
+        return 0;
+}