Remove kdbus custom endpoint support

This feature will not be used anytime soon, so remove a bit of cruft.

The BusPolicy= config directive will stay around as compat noop.

19 files changed, 3 insertions, 428 deletions

diff --git a/src/basic/exit-status.c b/src/basic/exit-status.c
index 5e0bc415c8..92fa5ace61 100644
--- a/src/basic/exit-status.c
+++ b/src/basic/exit-status.c
@@ -147,9 +147,6 @@ const char* exit_status_to_string(ExitStatus status, ExitStatusLevel level) {
                 case EXIT_MAKE_STARTER:
                         return "MAKE_STARTER";
 
-                case EXIT_BUS_ENDPOINT:
-                        return "BUS_ENDPOINT";
-
                 case EXIT_SMACK_PROCESS_LABEL:
                         return "SMACK_PROCESS_LABEL";
                 }
diff --git a/src/basic/exit-status.h b/src/basic/exit-status.h
index 79525d30ee..1208c8feed 100644
--- a/src/basic/exit-status.h
+++ b/src/basic/exit-status.h
@@ -77,7 +77,6 @@ typedef enum ExitStatus {
         EXIT_RUNTIME_DIRECTORY,
         EXIT_MAKE_STARTER,
         EXIT_CHOWN,
-        EXIT_BUS_ENDPOINT,
         EXIT_SMACK_PROCESS_LABEL,
 } ExitStatus;
 
diff --git a/src/core/bus-endpoint.c b/src/core/bus-endpoint.c
deleted file mode 100644
index d22a80c91f..0000000000
--- a/src/core/bus-endpoint.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Daniel Mack
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdlib.h>
-
-#include "alloc-util.h"
-#include "bus-endpoint.h"
-#include "bus-kernel.h"
-#include "bus-policy.h"
-#include "kdbus.h"
-
-int bus_kernel_set_endpoint_policy(int fd, uid_t uid, BusEndpoint *ep) {
-
-        struct kdbus_cmd *update;
-        struct kdbus_item *n;
-        BusEndpointPolicy *po;
-        Iterator i;
-        size_t size;
-        int r;
-
-        size = ALIGN8(offsetof(struct kdbus_cmd, items));
-
-        HASHMAP_FOREACH(po, ep->policy_hash, i) {
-                size += ALIGN8(offsetof(struct kdbus_item, str) + strlen(po->name) + 1);
-                size += ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access));
-        }
-
-        update = alloca0_align(size, 8);
-        update->size = size;
-
-        n = update->items;
-
-        HASHMAP_FOREACH(po, ep->policy_hash, i) {
-                n->type = KDBUS_ITEM_NAME;
-                n->size = offsetof(struct kdbus_item, str) + strlen(po->name) + 1;
-                strcpy(n->str, po->name);
-                n = KDBUS_ITEM_NEXT(n);
-
-                n->type = KDBUS_ITEM_POLICY_ACCESS;
-                n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
-
-                n->policy_access.type = KDBUS_POLICY_ACCESS_USER;
-                n->policy_access.access = bus_kernel_translate_access(po->access);
-                n->policy_access.id = uid;
-
-                n = KDBUS_ITEM_NEXT(n);
-        }
-
-        r = ioctl(fd, KDBUS_CMD_ENDPOINT_UPDATE, update);
-        if (r < 0)
-                return -errno;
-
-        return 0;
-}
-
-int bus_endpoint_new(BusEndpoint **ep) {
-        assert(ep);
-
-        *ep = new0(BusEndpoint, 1);
-        if (!*ep)
-                return -ENOMEM;
-
-        return 0;
-}
-
-int bus_endpoint_add_policy(BusEndpoint *ep, const char *name, BusPolicyAccess access) {
-        _cleanup_free_ BusEndpointPolicy *po = NULL;
-        _cleanup_free_ char *key = NULL;
-        int r;
-
-        assert(ep);
-        assert(name);
-        assert(access > _BUS_POLICY_ACCESS_INVALID && access < _BUS_POLICY_ACCESS_MAX);
-
-        /* check if we already have this name in the policy list. If we do, see if the new access level
-         * is higher than the exising one, and upgrade the entry in that case. Otherwise, do nothing.
-         */
-
-        if (ep->policy_hash) {
-                po = hashmap_get(ep->policy_hash, name);
-                if (po) {
-                        if (po->access < access)
-                                po->access = access;
-
-                        return 0;
-                }
-        } else {
-                ep->policy_hash = hashmap_new(&string_hash_ops);
-                if (!ep->policy_hash)
-                        return -ENOMEM;
-        }
-
-        po = new0(BusEndpointPolicy, 1);
-        if (!po)
-                return -ENOMEM;
-
-        key = strdup(name);
-        if (!key)
-                return -ENOMEM;
-
-        po->name = key;
-        po->access = access;
-
-        r = hashmap_put(ep->policy_hash, key, po);
-        if (r < 0)
-                return r;
-
-        po = NULL;
-        key = NULL;
-        return 0;
-}
-
-void bus_endpoint_free(BusEndpoint *endpoint) {
-        if (!endpoint)
-                return;
-
-        hashmap_free_free_free(endpoint->policy_hash);
-        free(endpoint);
-}
diff --git a/src/core/bus-endpoint.h b/src/core/bus-endpoint.h
deleted file mode 100644
index f2fbc4701c..0000000000
--- a/src/core/bus-endpoint.h
+++ /dev/null
@@ -1,42 +0,0 @@
-#pragma once
-
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Daniel Mack
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-typedef struct BusEndpoint BusEndpoint;
-typedef struct BusEndpointPolicy BusEndpointPolicy;
-
-#include "bus-policy.h"
-#include "hashmap.h"
-
-struct BusEndpointPolicy {
-        char *name;
-        BusPolicyAccess access;
-};
-
-struct BusEndpoint {
-        Hashmap *policy_hash;
-};
-
-int bus_endpoint_new(BusEndpoint **ep);
-void bus_endpoint_free(BusEndpoint *endpoint);
-
-int bus_endpoint_add_policy(BusEndpoint *ep, const char *name, BusPolicyAccess access);
-
-int bus_kernel_set_endpoint_policy(int fd, uid_t uid, BusEndpoint *ep);
diff --git a/src/core/busname.h b/src/core/busname.h
index 6b6f6c62d4..52c4055dbb 100644
--- a/src/core/busname.h
+++ b/src/core/busname.h
@@ -23,6 +23,7 @@ typedef struct BusName BusName;
 typedef struct BusNamePolicy BusNamePolicy;
 
 #include "unit.h"
+#include "bus-policy.h"
 
 typedef enum BusNameResult {
         BUSNAME_SUCCESS,
diff --git a/src/core/execute.c b/src/core/execute.c
index 1e4630182d..30f7e05b90 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -57,7 +57,6 @@
 #endif
 #include "async.h"
 #include "barrier.h"
-#include "bus-endpoint.h"
 #include "cap-list.h"
 #include "capability-util.h"
 #include "def.h"
@@ -1387,9 +1386,6 @@ static bool exec_needs_mount_namespace(
         if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir))
                 return true;
 
-        if (params->bus_endpoint_path)
-                return true;
-
         if (context->private_devices ||
             context->protect_system != PROTECT_SYSTEM_NO ||
             context->protect_home != PROTECT_HOME_NO)
@@ -1423,9 +1419,6 @@ static int close_remaining_fds(
                 n_dont_close += n_fds;
         }
 
-        if (params->bus_endpoint_fd >= 0)
-                dont_close[n_dont_close++] = params->bus_endpoint_fd;
-
         if (runtime) {
                 if (runtime->netns_storage_socket[0] >= 0)
                         dont_close[n_dont_close++] = runtime->netns_storage_socket[0];
@@ -1655,16 +1648,6 @@ static int exec_child(
                 }
         }
 
-        if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) {
-                uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid;
-
-                r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint);
-                if (r < 0) {
-                        *exit_status = EXIT_BUS_ENDPOINT;
-                        return r;
-                }
-        }
-
         /* If delegation is enabled we'll pass ownership of the cgroup
          * (but only in systemd's own controller hierarchy!) to the
          * user of the new process. */
@@ -1787,7 +1770,6 @@ static int exec_child(
                                 context->inaccessible_dirs,
                                 tmp,
                                 var,
-                                params->bus_endpoint_path,
                                 context->private_devices,
                                 context->protect_home,
                                 context->protect_system,
@@ -2214,9 +2196,6 @@ void exec_context_done(ExecContext *c) {
         c->address_families = set_free(c->address_families);
 
         c->runtime_directory = strv_free(c->runtime_directory);
-
-        bus_endpoint_free(c->bus_endpoint);
-        c->bus_endpoint = NULL;
 }
 
 int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) {
diff --git a/src/core/execute.h b/src/core/execute.h
index 578f85b6bc..f7205701f4 100644
--- a/src/core/execute.h
+++ b/src/core/execute.h
@@ -30,7 +30,6 @@ typedef struct ExecParameters ExecParameters;
 #include <stdio.h>
 #include <sys/capability.h>
 
-#include "bus-endpoint.h"
 #include "fdset.h"
 #include "list.h"
 #include "missing.h"
@@ -201,9 +200,6 @@ struct ExecContext {
         bool ioprio_set:1;
         bool cpu_sched_set:1;
         bool no_new_privileges_set:1;
-
-        /* custom dbus enpoint */
-        BusEndpoint *bus_endpoint;
 };
 
 #include "cgroup-util.h"
@@ -234,9 +230,6 @@ struct ExecParameters {
 
         int *idle_pipe;
 
-        char *bus_endpoint_path;
-        int bus_endpoint_fd;
-
         int stdin_fd;
         int stdout_fd;
         int stderr_fd;
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index 5024fd19a5..fde64c9747 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -240,7 +240,7 @@ Service.BusName,                 config_parse_bus_name,              0,
 Service.FileDescriptorStoreMax,  config_parse_unsigned,              0,                             offsetof(Service, n_fd_store_max)
 Service.NotifyAccess,            config_parse_notify_access,         0,                             offsetof(Service, notify_access)
 Service.Sockets,                 config_parse_service_sockets,       0,                             0
-Service.BusPolicy,               config_parse_bus_endpoint_policy,   0,                             offsetof(Service, exec_context)
+Service.BusPolicy,               config_parse_warn_compat,           DISABLED_LEGACY,               0
 Service.USBFunctionDescriptors,  config_parse_path,                  0,                             offsetof(Service, usb_function_descriptors)
 Service.USBFunctionStrings,      config_parse_path,                  0,                             offsetof(Service, usb_function_strings)
 EXEC_CONTEXT_CONFIG_ITEMS(Service)m4_dnl
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index b3dec7b8cc..ba551fb41d 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -1902,59 +1902,6 @@ int config_parse_bus_policy(
         return 0;
 }
 
-int config_parse_bus_endpoint_policy(
-                const char *unit,
-                const char *filename,
-                unsigned line,
-                const char *section,
-                unsigned section_line,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        _cleanup_free_ char *name = NULL;
-        BusPolicyAccess access;
-        ExecContext *c = data;
-        char *access_str;
-        int r;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        name = strdup(rvalue);
-        if (!name)
-                return log_oom();
-
-        access_str = strpbrk(name, WHITESPACE);
-        if (!access_str) {
-                log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid endpoint policy value '%s'", rvalue);
-                return 0;
-        }
-
-        *access_str = '\0';
-        access_str++;
-        access_str += strspn(access_str, WHITESPACE);
-
-        access = bus_policy_access_from_string(access_str);
-        if (access <= _BUS_POLICY_ACCESS_INVALID ||
-            access >= _BUS_POLICY_ACCESS_MAX) {
-                log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid endpoint policy access type '%s'", access_str);
-                return 0;
-        }
-
-        if (!c->bus_endpoint) {
-                r = bus_endpoint_new(&c->bus_endpoint);
-                if (r < 0)
-                        return log_error_errno(r, "Failed to create bus endpoint object: %m");
-        }
-
-        return bus_endpoint_add_policy(c->bus_endpoint, name, access);
-}
-
 int config_parse_working_directory(
                 const char *unit,
                 const char *filename,
diff --git a/src/core/load-fragment.h b/src/core/load-fragment.h
index 5fb5910919..372d05a61d 100644
--- a/src/core/load-fragment.h
+++ b/src/core/load-fragment.h
@@ -67,7 +67,6 @@ int config_parse_service_sockets(const char *unit, const char *filename, unsigne
 int config_parse_busname_service(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_bus_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_bus_policy_world(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
-int config_parse_bus_endpoint_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_unit_env_file(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_ip_tos(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_unit_condition_path(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/core/mount.c b/src/core/mount.c
index de1075d3a0..93d2bd595c 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -703,7 +703,6 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
                 .apply_permissions = true,
                 .apply_chroot      = true,
                 .apply_tty_stdin   = true,
-                .bus_endpoint_fd   = -1,
                 .stdin_fd          = -1,
                 .stdout_fd         = -1,
                 .stderr_fd         = -1,
diff --git a/src/core/namespace.c b/src/core/namespace.c
index 4fa381db5b..b573f008b9 100644
--- a/src/core/namespace.c
+++ b/src/core/namespace.c
@@ -51,7 +51,6 @@ typedef enum MountMode {
         PRIVATE_TMP,
         PRIVATE_VAR_TMP,
         PRIVATE_DEV,
-        PRIVATE_BUS_ENDPOINT,
         READWRITE
 } MountMode;
 
@@ -268,78 +267,6 @@ fail:
         return r;
 }
 
-static int mount_kdbus(BindMount *m) {
-
-        char temporary_mount[] = "/tmp/kdbus-dev-XXXXXX";
-        _cleanup_free_ char *basepath = NULL;
-        _cleanup_umask_ mode_t u;
-        char *busnode = NULL, *root;
-        struct stat st;
-        int r;
-
-        assert(m);
-
-        u = umask(0000);
-
-        if (!mkdtemp(temporary_mount))
-                return log_error_errno(errno, "Failed create temp dir: %m");
-
-        root = strjoina(temporary_mount, "/kdbus");
-        (void) mkdir(root, 0755);
-        if (mount("tmpfs", root, "tmpfs", MS_NOSUID|MS_STRICTATIME, "mode=777") < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        /* create a new /dev/null dev node copy so we have some fodder to
-         * bind-mount the custom endpoint over. */
-        if (stat("/dev/null", &st) < 0) {
-                r = log_error_errno(errno, "Failed to stat /dev/null: %m");
-                goto fail;
-        }
-
-        busnode = strjoina(root, "/bus");
-        if (mknod(busnode, (st.st_mode & ~07777) | 0600, st.st_rdev) < 0) {
-                r = log_error_errno(errno, "mknod() for %s failed: %m",
-                                    busnode);
-                goto fail;
-        }
-
-        r = mount(m->path, busnode, NULL, MS_BIND, NULL);
-        if (r < 0) {
-                r = log_error_errno(errno, "bind mount of %s failed: %m",
-                                    m->path);
-                goto fail;
-        }
-
-        basepath = dirname_malloc(m->path);
-        if (!basepath) {
-                r = -ENOMEM;
-                goto fail;
-        }
-
-        if (mount(root, basepath, NULL, MS_MOVE, NULL) < 0) {
-                r = log_error_errno(errno, "bind mount of %s failed: %m",
-                                    basepath);
-                goto fail;
-        }
-
-        rmdir(temporary_mount);
-        return 0;
-
-fail:
-        if (busnode) {
-                umount(busnode);
-                unlink(busnode);
-        }
-
-        umount(root);
-        rmdir(root);
-        rmdir(temporary_mount);
-
-        return r;
-}
-
 static int apply_mount(
                 BindMount *m,
                 const char *tmp_dir,
@@ -379,9 +306,6 @@ static int apply_mount(
         case PRIVATE_DEV:
                 return mount_dev(m);
 
-        case PRIVATE_BUS_ENDPOINT:
-                return mount_kdbus(m);
-
         default:
                 assert_not_reached("Unknown mode");
         }
@@ -422,7 +346,6 @@ int setup_namespace(
                 char** inaccessible_dirs,
                 const char* tmp_dir,
                 const char* var_tmp_dir,
-                const char* bus_endpoint_path,
                 bool private_dev,
                 ProtectHome protect_home,
                 ProtectSystem protect_system,
@@ -438,7 +361,7 @@ int setup_namespace(
         if (unshare(CLONE_NEWNS) < 0)
                 return -errno;
 
-        n = !!tmp_dir + !!var_tmp_dir + !!bus_endpoint_path +
+        n = !!tmp_dir + !!var_tmp_dir +
                 strv_length(read_write_dirs) +
                 strv_length(read_only_dirs) +
                 strv_length(inaccessible_dirs) +
@@ -479,12 +402,6 @@ int setup_namespace(
                         m++;
                 }
 
-                if (bus_endpoint_path) {
-                        m->path = prefix_roota(root_directory, bus_endpoint_path);
-                        m->mode = PRIVATE_BUS_ENDPOINT;
-                        m++;
-                }
-
                 if (protect_home != PROTECT_HOME_NO) {
                         const char *home_dir, *run_user_dir, *root_dir;
 
diff --git a/src/core/namespace.h b/src/core/namespace.h
index 40bee74e2c..b54b7b47d6 100644
--- a/src/core/namespace.h
+++ b/src/core/namespace.h
@@ -45,7 +45,6 @@ int setup_namespace(const char *chroot,
                     char **inaccessible_dirs,
                     const char *tmp_dir,
                     const char *var_tmp_dir,
-                    const char *endpoint_path,
                     bool private_dev,
                     ProtectHome protect_home,
                     ProtectSystem protect_system,
diff --git a/src/core/service.c b/src/core/service.c
index ac7e41d777..ed24417859 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -113,7 +113,6 @@ static void service_init(Unit *u) {
         s->runtime_max_usec = USEC_INFINITY;
         s->type = _SERVICE_TYPE_INVALID;
         s->socket_fd = -1;
-        s->bus_endpoint_fd = -1;
         s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
         s->guess_main_pid = true;
 
@@ -321,7 +320,6 @@ static void service_done(Unit *u) {
 
         s->bus_name_owner = mfree(s->bus_name_owner);
 
-        s->bus_endpoint_fd = safe_close(s->bus_endpoint_fd);
         service_close_socket_fd(s);
         service_connection_unref(s);
 
@@ -1157,7 +1155,6 @@ static int service_spawn(
                 pid_t *_pid) {
 
         _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL;
-        _cleanup_free_ char *bus_endpoint_path = NULL;
         _cleanup_free_ int *fds = NULL;
         unsigned n_fds = 0, n_env = 0;
         const char *path;
@@ -1167,7 +1164,6 @@ static int service_spawn(
                 .apply_permissions = apply_permissions,
                 .apply_chroot      = apply_chroot,
                 .apply_tty_stdin   = apply_tty_stdin,
-                .bus_endpoint_fd   = -1,
                 .stdin_fd          = -1,
                 .stdout_fd         = -1,
                 .stderr_fd         = -1,
@@ -1267,18 +1263,6 @@ static int service_spawn(
         } else
                 path = UNIT(s)->cgroup_path;
 
-        if (s->exec_context.bus_endpoint) {
-                r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == MANAGER_SYSTEM ? "system" : "user",
-                                               UNIT(s)->id, &bus_endpoint_path);
-                if (r < 0)
-                        return r;
-
-                /* Pass the fd to the exec_params so that the child process can upload the policy.
-                 * Keep a reference to the fd in the service, so the endpoint is kept alive as long
-                 * as the service is running. */
-                exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r;
-        }
-
         exec_params.argv = argv;
         exec_params.fds = fds;
         exec_params.fd_names = fd_names;
@@ -1290,7 +1274,6 @@ static int service_spawn(
         exec_params.cgroup_delegate = s->cgroup_context.delegate;
         exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
         exec_params.watchdog_usec = s->watchdog_usec;
-        exec_params.bus_endpoint_path = bus_endpoint_path;
         exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
         if (s->type == SERVICE_IDLE)
                 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
@@ -2126,9 +2109,6 @@ static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
         r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
         if (r < 0)
                 return r;
-        r = unit_serialize_item_fd(u, f, fds, "endpoint-fd", s->bus_endpoint_fd);
-        if (r < 0)
-                return r;
 
         LIST_FOREACH(fd_store, fs, s->fd_store) {
                 _cleanup_free_ char *c = NULL;
@@ -2263,15 +2243,6 @@ static int service_deserialize_item(Unit *u, const char *key, const char *value,
                         asynchronous_close(s->socket_fd);
                         s->socket_fd = fdset_remove(fds, fd);
                 }
-        } else if (streq(key, "endpoint-fd")) {
-                int fd;
-
-                if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
-                        log_unit_debug(u, "Failed to parse endpoint-fd value: %s", value);
-                else {
-                        safe_close(s->bus_endpoint_fd);
-                        s->bus_endpoint_fd = fdset_remove(fds, fd);
-                }
         } else if (streq(key, "fd-store-fd")) {
                 const char *fdv;
                 size_t pf;
diff --git a/src/core/service.h b/src/core/service.h
index d342e000bb..a5ced215e4 100644
--- a/src/core/service.h
+++ b/src/core/service.h
@@ -150,8 +150,6 @@ struct Service {
         int socket_fd;
         bool socket_fd_selinux_context_net;
 
-        int bus_endpoint_fd;
-
         bool permissions_start_only;
         bool root_directory_start_only;
         bool remain_after_exit;
diff --git a/src/core/socket.c b/src/core/socket.c
index 976687af41..a1cb54d77a 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -1527,7 +1527,6 @@ static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
                 .apply_permissions = true,
                 .apply_chroot      = true,
                 .apply_tty_stdin   = true,
-                .bus_endpoint_fd   = -1,
                 .stdin_fd          = -1,
                 .stdout_fd         = -1,
                 .stderr_fd         = -1,
diff --git a/src/core/swap.c b/src/core/swap.c
index 1bf0c0a808..11506d9ecb 100644
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -609,7 +609,6 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
                 .apply_permissions = true,
                 .apply_chroot      = true,
                 .apply_tty_stdin   = true,
-                .bus_endpoint_fd   = -1,
                 .stdin_fd          = -1,
                 .stdout_fd         = -1,
                 .stderr_fd         = -1,
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 0896eeb177..59398b841d 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -1693,50 +1693,6 @@ int bus_kernel_open_bus_fd(const char *bus, char **path) {
         return fd;
 }
 
-int bus_kernel_create_endpoint(const char *bus_name, const char *ep_name, char **ep_path) {
-        _cleanup_free_ char *path = NULL;
-        struct kdbus_cmd *make;
-        struct kdbus_item *n;
-        const char *name;
-        int fd;
-
-        fd = bus_kernel_open_bus_fd(bus_name, &path);
-        if (fd < 0)
-                return fd;
-
-        make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd, items)) +
-                             ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + strlen(ep_name) + 1),
-                             8);
-        make->size = ALIGN8(offsetof(struct kdbus_cmd, items));
-        make->flags = KDBUS_MAKE_ACCESS_WORLD;
-
-        n = make->items;
-        sprintf(n->str, UID_FMT "-%s", getuid(), ep_name);
-        n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
-        n->type = KDBUS_ITEM_MAKE_NAME;
-        make->size += ALIGN8(n->size);
-        name = n->str;
-
-        if (ioctl(fd, KDBUS_CMD_ENDPOINT_MAKE, make) < 0) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        if (ep_path) {
-                char *p;
-
-                p = strjoin(dirname(path), "/", name, NULL);
-                if (!p) {
-                        safe_close(fd);
-                        return -ENOMEM;
-                }
-
-                *ep_path = p;
-        }
-
-        return fd;
-}
-
 int bus_kernel_try_close(sd_bus *bus) {
         struct kdbus_cmd byebye = { .size = sizeof(byebye) };
 
diff --git a/src/test/test-ns.c b/src/test/test-ns.c
index cf627be6c5..9248f2987c 100644
--- a/src/test/test-ns.c
+++ b/src/test/test-ns.c
@@ -68,7 +68,6 @@ int main(int argc, char *argv[]) {
                             (char **) inaccessible,
                             tmp_dir,
                             var_tmp_dir,
-                            NULL,
                             true,
                             PROTECT_HOME_NO,
                             PROTECT_SYSTEM_NO,