Merge 028b710a62 into bbec1c87d3

Continuation of 4ebbb5bfe8.
Closes #35307.

man/daemon.xml

@@ -684,6 +684,15 @@ fi</programlisting>
     <citerefentry><refentrytitle>file-hierarchy</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
   </refsect1>
 
+  <refsect1>
+    <title>Notes</title>
+
+    <para>
+       All example codes in this page are licensed under <literal>MIT No Attribution</literal>
+      (SPDX-License-Identifier: MIT-0).
+    </para>
+  </refsect1>
+
   <refsect1>
     <title>See Also</title>
     <para><simplelist type="inline">

man/importctl.xml

@@ -128,7 +128,8 @@
 
         <para>If <option>-keep-download=yes</option> is specified the image will be downloaded and stored in
         a read-only subvolume/directory in the image directory that is named after the specified URL and its
-        HTTP etag. A writable snapshot is then taken from this subvolume, and named after the specified local
+        HTTP etag (see <ulink url="https://en.wikipedia.org/wiki/HTTP_ETag">HTTP ETag</ulink> for more
+        information). A writable snapshot is then taken from this subvolume, and named after the specified local
         name. This behavior ensures that creating multiple instances of the same URL is efficient, as
         multiple downloads are not necessary. In order to create only the read-only image, and avoid creating
         its writable snapshot, specify <literal>-</literal> as local name.</para>

man/pam_systemd_loadkey.xml

@@ -28,7 +28,9 @@
     <title>Description</title>
 
     <para><command>pam_systemd_loadkey</command> reads a NUL-separated password list from the kernel keyring,
-    and sets the last password in the list as the PAM authtok.</para>
+    and sets the last password in the list as the PAM authtok, which can be used by e.g.
+    <citerefentry project='man-pages'><refentrytitle>pam_get_authtok</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+    </para>
 
     <para>The password list is supposed to be stored in the "user" keyring of the root user,
     by an earlier call to

man/run0.xml

@@ -61,7 +61,10 @@
     <literal>systemd-run0</literal> PAM stack.</para>
 
     <para>Note that <command>run0</command> is implemented as an alternative multi-call invocation of
-    <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
+    <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>. That is,
+    <command>run0</command> is a symbolic link to <command>systemd-run</command> executable file, and it
+    behaves as <command>run0</command> if it is invoked through the symbolic link, otherwise behaves as
+    <command>systemd-run</command>.</para>
   </refsect1>
 
   <refsect1>

man/systemd-rfkill.service.xml

@@ -41,8 +41,10 @@
   <refsect1>
     <title>Kernel Command Line</title>
 
-    <para><filename>systemd-rfkill</filename> understands the
+    <para>
-    following kernel command line parameter:</para>
+      <command>systemd-rfkill</command> understands the following kernel command line parameter. See also
+      <citerefentry><refentrytitle>kernel-command-line</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
+    </para>
 
     <variablelist class='kernel-commandline-options'>
       <varlistentry>

man/systemd-system.conf.xml

@@ -302,7 +302,7 @@
         and running in an initrd equivalent to true, otherwise false. This implements a restricted subset of
         the per-unit setting of the same name, see
         <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
-        details: currently, the <literal>full</literal> or <literal>struct</literal> values are not
+        details: currently, the <literal>full</literal> or <literal>strict</literal> values are not
         supported.</para>
 
         <xi:include href="version-info.xml" xpointer="v256"/></listitem>

man/ukify.xml

@@ -394,9 +394,9 @@
           <listitem><para>SBAT metadata associated with the UKI or addon. SBAT policies are useful to revoke
           whole groups of UKIs or addons with a single, static policy update that does not take space in
           DBX/MOKX. If not specified manually, a default metadata entry consisting of
-          <literal>uki,1,UKI,uki,1,https://uapi-group.org/specifications/specs/unified_kernel_image/</literal>
+          <programlisting>uki,1,UKI,uki,1,https://uapi-group.org/specifications/specs/unified_kernel_image/</programlisting>
           for UKIs and
-          <literal>uki-addon,1,UKI Addon,addon,1,https://www.freedesktop.org/software/systemd/man/latest/systemd-stub.html</literal>
+          <programlisting>uki-addon,1,UKI Addon,addon,1,https://www.freedesktop.org/software/systemd/man/latest/systemd-stub.html</programlisting>
           for addons will be used, to ensure it is always possible to revoke them. For more information on
           SBAT see <ulink url="https://github.com/rhboot/shim/blob/main/SBAT.md">Shim documentation</ulink>.
           </para>

meson.build

@@ -27,6 +27,8 @@ conf = configuration_data()
 conf.set_quoted('PROJECT_URL', 'https://systemd.io/')
 conf.set('PROJECT_VERSION', project_major_version,
          description : 'Numerical project version (used where a simple number is expected)')
+conf.set_quoted('PROJECT_VERSION_STR', project_major_version,
+        description: 'Stringified project version (used where a simple string is expected)')
 conf.set_quoted('PROJECT_VERSION_FULL', meson.project_version(), description : 'Full project version')
 
 # This is to be used instead of meson.source_root(), as the latter will return

src/basic/fileio.c

@@ -289,7 +289,8 @@ int write_string_file_full(
                 const char *fn,
                 const char *line,
                 WriteStringFileFlags flags,
-                const struct timespec *ts) {
+                const struct timespec *ts,
+                const char *label_fn) {
 
         bool call_label_ops_post = false, made_file = false;
         _cleanup_fclose_ FILE *f = NULL;
@@ -321,7 +322,8 @@ int write_string_file_full(
         mode_t mode = write_string_file_flags_to_mode(flags);
 
         if (FLAGS_SET(flags, WRITE_STRING_FILE_LABEL|WRITE_STRING_FILE_CREATE)) {
-                r = label_ops_pre(dir_fd, fn, mode);
+                const char *lookup = label_fn ? label_fn : fn;
+                r = label_ops_pre(dir_fd, lookup, mode);
                 if (r < 0)
                         goto fail;
 

src/basic/fileio.h

@@ -51,12 +51,13 @@ int write_string_stream_full(FILE *f, const char *line, WriteStringFileFlags fla
 static inline int write_string_stream(FILE *f, const char *line, WriteStringFileFlags flags) {
         return write_string_stream_full(f, line, flags, /* ts= */ NULL);
 }
-int write_string_file_full(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags, const struct timespec *ts);
+
+int write_string_file_full(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags, const struct timespec *ts, const char *label_fn);
 static inline int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) {
-        return write_string_file_full(AT_FDCWD, fn, line, flags, /* ts= */ NULL);
+        return write_string_file_full(AT_FDCWD, fn, line, flags, /* ts= */ NULL, /*label_fn=*/ NULL);
 }
 static inline int write_string_file_at(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags) {
-        return write_string_file_full(dir_fd, fn, line, flags, /* ts= */ NULL);
+        return write_string_file_full(dir_fd, fn, line, flags, /* ts= */ NULL, /*label_fn=*/ NULL);
 }
 int write_string_filef(const char *fn, WriteStringFileFlags flags, const char *format, ...) _printf_(3, 4);
 

src/basic/log.c

@@ -1471,6 +1471,12 @@ int log_get_max_level(void) {
         return log_max_level;
 }
 
+int log_get_target_max_level(LogTarget target) {
+        assert(target >= 0);
+        assert(target < _LOG_TARGET_SINGLE_MAX);
+        return log_target_max_level[target];
+}
+
 void log_show_color(bool b) {
         show_color = b;
 }

src/basic/log.h

@@ -59,6 +59,7 @@ void log_settle_target(void);
 int log_set_max_level(int level);
 int log_set_max_level_from_string(const char *e);
 int log_get_max_level(void) _pure_;
+int log_get_target_max_level(LogTarget target);
 int log_max_levels_to_string(int level, char **ret);
 
 void log_set_facility(int facility);

src/core/core-varlink.c

@@ -3,13 +3,19 @@
 #include "sd-varlink.h"
 
 #include "core-varlink.h"
+#include "format-util.h"
 #include "json-util.h"
+#include "manager-varlink.h"
 #include "mkdir-label.h"
 #include "strv.h"
+#include "unit-varlink.h"
 #include "user-util.h"
 #include "varlink-internal.h"
+#include "varlink-serialize.h"
+#include "varlink-io.systemd.Unit.h"
 #include "varlink-io.systemd.UserDatabase.h"
 #include "varlink-io.systemd.ManagedOOM.h"
+#include "varlink-io.systemd.Manager.h"
 #include "varlink-util.h"
 
 typedef struct LookupParameters {
@@ -579,34 +585,50 @@ int manager_setup_varlink_server(Manager *m) {
         if (m->varlink_server)
                 return 0;
 
-        if (!MANAGER_IS_SYSTEM(m))
+        sd_varlink_server_flags_t flags = SD_VARLINK_SERVER_INHERIT_USERDATA;
-                return -EINVAL;
+        if (MANAGER_IS_SYSTEM(m))
+                flags |= SD_VARLINK_SERVER_ACCOUNT_UID;
 
-        r = sd_varlink_server_new(&s, SD_VARLINK_SERVER_ACCOUNT_UID|SD_VARLINK_SERVER_INHERIT_USERDATA);
+        r = sd_varlink_server_new(&s, flags);
         if (r < 0)
                 return log_debug_errno(r, "Failed to allocate varlink server object: %m");
 
         sd_varlink_server_set_userdata(s, m);
 
-        r = sd_varlink_server_add_interface_many(
+        r = sd_varlink_server_add_interface_many(s,
-                        s,
+                        &vl_interface_io_systemd_Manager,
-                        &vl_interface_io_systemd_UserDatabase,
+                        &vl_interface_io_systemd_Unit);
-                        &vl_interface_io_systemd_ManagedOOM);
         if (r < 0)
                 return log_debug_errno(r, "Failed to add interfaces to varlink server: %m");
 
         r = sd_varlink_server_bind_method_many(
                         s,
-                        "io.systemd.UserDatabase.GetUserRecord",  vl_method_get_user_record,
+                        "io.systemd.Manager.Describe", vl_method_describe_manager,
-                        "io.systemd.UserDatabase.GetGroupRecord", vl_method_get_group_record,
+                        "io.systemd.Unit.List",        vl_method_list_units);
-                        "io.systemd.UserDatabase.GetMemberships", vl_method_get_memberships,
-                        "io.systemd.ManagedOOM.SubscribeManagedOOMCGroups", vl_method_subscribe_managed_oom_cgroups);
         if (r < 0)
                 return log_debug_errno(r, "Failed to register varlink methods: %m");
 
-        r = sd_varlink_server_bind_disconnect(s, vl_disconnect);
+        if (MANAGER_IS_SYSTEM(m)) {
-        if (r < 0)
+                r = sd_varlink_server_add_interface_many(
-                return log_debug_errno(r, "Failed to register varlink disconnect handler: %m");
+                                s,
+                                &vl_interface_io_systemd_UserDatabase,
+                                &vl_interface_io_systemd_ManagedOOM);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to add interfaces to varlink server: %m");
+
+                r = sd_varlink_server_bind_method_many(
+                                s,
+                                "io.systemd.UserDatabase.GetUserRecord",  vl_method_get_user_record,
+                                "io.systemd.UserDatabase.GetGroupRecord", vl_method_get_group_record,
+                                "io.systemd.UserDatabase.GetMemberships", vl_method_get_memberships,
+                                "io.systemd.ManagedOOM.SubscribeManagedOOMCGroups", vl_method_subscribe_managed_oom_cgroups);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to register varlink methods: %m");
+
+                r = sd_varlink_server_bind_disconnect(s, vl_disconnect);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to register varlink disconnect handler: %m");
+        }
 
         r = sd_varlink_server_attach_event(s, m->event, EVENT_PRIORITY_IPC);
         if (r < 0)
@@ -630,22 +652,22 @@ static int manager_varlink_init_system(Manager *m) {
         bool fresh = r > 0;
 
         if (!MANAGER_IS_TEST_RUN(m)) {
-                (void) mkdir_p_label("/run/systemd/userdb", 0755);
+                FOREACH_STRING(dir,
+                               "/run/systemd/userdb",
+                               "/run/systemd/unit") {
+                        r = mkdir_p_label(dir, 0755);
+                        if (r < 0)
+                                log_debug_errno(r, "Failed to create dir '%s', ignoring: %m", dir);
+                }
 
-                FOREACH_STRING(address, "/run/systemd/userdb/io.systemd.DynamicUser", VARLINK_ADDR_PATH_MANAGED_OOM_SYSTEM) {
+                FOREACH_STRING(address,
-                        if (!fresh) {
+                               "/run/systemd/userdb/io.systemd.DynamicUser",
-                                /* We might have got sockets through deserialization. Do not bind to them twice. */
+                               VARLINK_ADDR_PATH_MANAGED_OOM_SYSTEM,
-
+                               "/run/systemd/io.systemd.Manager",
-                                bool found = false;
+                               "/run/systemd/unit/io.systemd.Unit") {
-                                LIST_FOREACH(sockets, ss, m->varlink_server->sockets)
+                        /* We might have got sockets through deserialization. Do not bind to them twice. */
-                                        if (path_equal(ss->address, address)) {
+                        if (!fresh && varlink_server_contains_socket(m->varlink_server, address))
-                                                found = true;
+                                continue;
-                                                break;
-                                        }
-
-                                if (found)
-                                        continue;
-                        }
 
                         r = sd_varlink_server_listen_address(m->varlink_server, address, 0666);
                         if (r < 0)
@@ -657,6 +679,8 @@ static int manager_varlink_init_system(Manager *m) {
 }
 
 static int manager_varlink_init_user(Manager *m) {
+        int r;
+
         assert(m);
 
         if (!MANAGER_IS_USER(m))
@@ -665,6 +689,34 @@ static int manager_varlink_init_user(Manager *m) {
         if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
+        r = manager_setup_varlink_server(m);
+        if (r < 0)
+                return log_error_errno(r, "Failed to set up varlink server: %m");
+        bool fresh = r > 0;
+
+        FOREACH_STRING(a,
+                       "systemd/io.systemd.Manager",
+                       "systemd/unit/io.systemd.Unit") {
+                _cleanup_free_ char *address = NULL, *dir = NULL;
+                address = path_join(m->prefix[EXEC_DIRECTORY_RUNTIME], a);
+                if (!address)
+                        return -ENOMEM;
+                /* We might have got sockets through deserialization. Do not bind to them twice. */
+                if (fresh || !varlink_server_contains_socket(m->varlink_server, address)) {
+                        r = path_extract_directory(address, &dir);
+                        if (r < 0)
+                                log_debug_errno(r, "Failed to extract directory from path '%s', ignoring: %m", address);
+
+                        r = mkdir_p_label(dir, 0755);
+                        if (r < 0)
+                                log_debug_errno(r, "Failed to create dir '%s', ignoring: %m", dir);
+
+                        r = sd_varlink_server_listen_address(m->varlink_server, address, 0666);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to bind to varlink socket '%s': %m", address);
+                }
+        }
+
         return manager_varlink_managed_oom_connect(m);
 }
 

src/core/manager-serialize.c

@@ -497,7 +497,7 @@ int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
                         if (r < 0)
                                 return r;
                 } else if ((val = startswith(l, "varlink-server-socket-address="))) {
-                        if (!m->varlink_server && MANAGER_IS_SYSTEM(m)) {
+                        if (!m->varlink_server) {
                                 r = manager_setup_varlink_server(m);
                                 if (r < 0) {
                                         log_warning_errno(r, "Failed to setup varlink server, ignoring: %m");

src/core/manager-varlink.c

@@ -0,0 +1,203 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sys/prctl.h>
+
+#include "build.h"
+#include "confidential-virt.h"
+#include "json-util.h"
+#include "manager-varlink.h"
+#include "manager.h"
+#include "syslog-util.h"
+#include "taint.h"
+#include "version.h"
+#include "varlink-common.h"
+#include "virt.h"
+#include "watchdog.h"
+
+static int manager_environment_build_json(sd_json_variant **ret, const char *name, void *userdata) {
+        _cleanup_strv_free_ char **l = NULL;
+        Manager *m = ASSERT_PTR(userdata);
+        int r;
+
+        assert(ret);
+
+        r = manager_get_effective_environment(m, &l);
+        if (r < 0)
+                return r;
+
+        if (strv_isempty(l))
+                return 0;
+
+        return sd_json_variant_new_array_strv(ret, l);
+}
+
+static int log_level_build_json(sd_json_variant **ret, const char *name, void *userdata, int log_max_level) {
+        _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
+        int r;
+
+        assert(ret);
+        assert(log_max_level >= 0);
+
+        for (int log_target = 0; log_target < _LOG_TARGET_SINGLE_MAX; log_target++) {
+                _cleanup_free_ char *log_level_string = NULL;
+
+                int target_max_level = log_get_target_max_level(log_target);
+                const char *log_target_string = log_target_to_string(log_target);
+
+                int log_level = MIN(log_max_level, target_max_level);
+                r = log_level_to_string_alloc(log_level, &log_level_string);
+                if (r < 0)
+                        return r;
+
+                r = sd_json_variant_set_field_string(&v, log_target_string, log_level_string);
+                if (r < 0)
+                        return r;
+        }
+
+        *ret = TAKE_PTR(v);
+        return 0;
+}
+
+static int log_level_build_context_json(sd_json_variant **ret, const char *name, void *userdata) {
+        Manager *m = ASSERT_PTR(userdata);
+        int log_level = m->log_level_overridden ? m->original_log_level : log_get_max_level();
+        return log_level_build_json(ret, name, userdata, log_level);
+}
+
+static int log_level_build_runtime_json(sd_json_variant **ret, const char *name, void *userdata) {
+        Manager *m = ASSERT_PTR(userdata);
+        if (!m->log_level_overridden)
+                return 0;
+
+        return log_level_build_json(ret, name, userdata, log_get_max_level());
+}
+
+static int manager_context_build_json(sd_json_variant **ret, const char *name, void *userdata) {
+        Manager *m = ASSERT_PTR(userdata);
+
+        return sd_json_buildo(ASSERT_PTR(ret),
+                        SD_JSON_BUILD_PAIR_STRING("Version", GIT_VERSION),
+                        SD_JSON_BUILD_PAIR_STRING("Architecture", architecture_to_string(uname_architecture())),
+                        SD_JSON_BUILD_PAIR_STRING("Features", systemd_features),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("ShowStatus", show_status_on(MANAGER_IS_USER(m) ? _SHOW_STATUS_INVALID : m->show_status)),
+                        SD_JSON_BUILD_PAIR_STRV("UnitPath", m->lookup_paths.search_path),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("LogLevel", log_level_build_context_json, m),
+                        SD_JSON_BUILD_PAIR_STRING("LogTarget", log_target_to_string(m->log_target_overridden ? m->original_log_target : log_get_target())),
+                        JSON_BUILD_PAIR_STRV_NON_EMPTY("Environment", m->transient_environment),
+                        SD_JSON_BUILD_PAIR_STRING("DefaultStandardOutput", exec_output_to_string(m->defaults.std_output)),
+                        SD_JSON_BUILD_PAIR_STRING("DefaultStandardError", exec_output_to_string(m->defaults.std_error)),
+                        JSON_BUILD_PAIR_FINITE_USEC("RuntimeWatchdogUSec", manager_get_watchdog(m, WATCHDOG_RUNTIME)),
+                        JSON_BUILD_PAIR_FINITE_USEC("RuntimeWatchdogPreUSec", manager_get_watchdog(m, WATCHDOG_PRETIMEOUT)),
+                        JSON_BUILD_PAIR_STRING_NON_EMPTY("RuntimeWatchdogPreGovernor", m->watchdog_pretimeout_governor),
+                        JSON_BUILD_PAIR_FINITE_USEC("RebootWatchdogUSec", manager_get_watchdog(m, WATCHDOG_REBOOT)),
+                        JSON_BUILD_PAIR_FINITE_USEC("KExecWatchdogUSec", manager_get_watchdog(m, WATCHDOG_KEXEC)),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("ServiceWatchdogs", m->service_watchdogs),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultTimerAccuracyUSec", m->defaults.timer_accuracy_usec),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutStartUSec", m->defaults.timeout_start_usec),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutStopUSec", m->defaults.timeout_stop_usec),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutAbortUSec", manager_default_timeout_abort_usec(m)),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultDeviceTimeoutUSec", m->defaults.device_timeout_usec),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultRestartUSec", m->defaults.restart_usec),
+                        JSON_BUILD_PAIR_RATELIMIT("DefaultStartLimit", &m->defaults.start_limit),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultCPUAccounting", m->defaults.cpu_accounting),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultBlockIOAccounting", m->defaults.blockio_accounting),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultIOAccounting", m->defaults.io_accounting),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultIPAccounting", m->defaults.ip_accounting),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultMemoryAccounting", m->defaults.memory_accounting),
+                        SD_JSON_BUILD_PAIR_BOOLEAN("DefaultTasksAccounting", m->defaults.tasks_accounting),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitCPU", rlimit_build_json, m->defaults.rlimit[RLIMIT_CPU]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitFSIZE", rlimit_build_json, m->defaults.rlimit[RLIMIT_FSIZE]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitDATA", rlimit_build_json, m->defaults.rlimit[RLIMIT_DATA]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitSTACK", rlimit_build_json, m->defaults.rlimit[RLIMIT_STACK]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitCORE", rlimit_build_json, m->defaults.rlimit[RLIMIT_CORE]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitRSS", rlimit_build_json, m->defaults.rlimit[RLIMIT_RSS]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitNOFILE", rlimit_build_json, m->defaults.rlimit[RLIMIT_NOFILE]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitAS", rlimit_build_json, m->defaults.rlimit[RLIMIT_AS]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitNPROC", rlimit_build_json, m->defaults.rlimit[RLIMIT_NPROC]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitMEMLOCK", rlimit_build_json, m->defaults.rlimit[RLIMIT_MEMLOCK]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitLOCKS", rlimit_build_json, m->defaults.rlimit[RLIMIT_LOCKS]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitSIGPENDING", rlimit_build_json, m->defaults.rlimit[RLIMIT_SIGPENDING]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitMSGQUEUE", rlimit_build_json, m->defaults.rlimit[RLIMIT_MSGQUEUE]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitNICE", rlimit_build_json, m->defaults.rlimit[RLIMIT_NICE]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitRTPRIO", rlimit_build_json, m->defaults.rlimit[RLIMIT_RTPRIO]),
+                        JSON_BUILD_PAIR_CALLBACK_NON_NULL("DefaultLimitRTTIME", rlimit_build_json, m->defaults.rlimit[RLIMIT_RTTIME]),
+                        SD_JSON_BUILD_PAIR_UNSIGNED("DefaultTasksMax", cgroup_tasks_max_resolve(&m->defaults.tasks_max)),
+                        JSON_BUILD_PAIR_FINITE_USEC("DefaultMemoryPressureThresholdUSec", m->defaults.memory_pressure_threshold_usec),
+                        SD_JSON_BUILD_PAIR_STRING("DefaultMemoryPressureWatch", cgroup_pressure_watch_to_string(m->defaults.memory_pressure_watch)),
+                        JSON_BUILD_PAIR_FINITE_USEC("TimerSlackNSec", (uint64_t) prctl(PR_GET_TIMERSLACK)),
+                        SD_JSON_BUILD_PAIR_STRING("DefaultOOMPolicy", oom_policy_to_string(m->defaults.oom_policy)),
+                        SD_JSON_BUILD_PAIR_INTEGER("DefaultOOMScoreAdjust", m->defaults.oom_score_adjust),
+                        SD_JSON_BUILD_PAIR_STRING("CtrlAltDelBurstAction", emergency_action_to_string(m->cad_burst_action)));
+}
+
+static int manager_runtime_build_json(sd_json_variant **ret, const char *name, void *userdata) {
+        Manager *m = ASSERT_PTR(userdata);
+        dual_timestamp watchdog_last_ping = {
+                .monotonic = watchdog_get_last_ping(CLOCK_MONOTONIC),
+                .realtime = watchdog_get_last_ping(CLOCK_REALTIME),
+        };
+        _cleanup_strv_free_ char **taints = NULL;
+
+        taints = taint_strv();
+        if (!taints)
+                return -ENOMEM;
+
+        return sd_json_buildo(ASSERT_PTR(ret),
+                SD_JSON_BUILD_PAIR_STRING("Virtualization", virtualization_to_string(detect_virtualization())),
+                SD_JSON_BUILD_PAIR_STRING("ConfidentialVirtualization", confidential_virtualization_to_string(detect_confidential_virtualization())),
+                SD_JSON_BUILD_PAIR_STRV("Taints", taints),
+                JSON_BUILD_PAIR_STRING_NON_EMPTY("ConfirmSpawn", manager_get_confirm_spawn(m)),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("FirmwareTimestamp", &m->timestamps[MANAGER_TIMESTAMP_FIRMWARE]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("LoaderTimestamp", &m->timestamps[MANAGER_TIMESTAMP_LOADER]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("KernelTimestamp", &m->timestamps[MANAGER_TIMESTAMP_KERNEL]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UserspaceTimestamp", &m->timestamps[MANAGER_TIMESTAMP_USERSPACE]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("FinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("SecurityStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_SECURITY_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("SecurityFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_SECURITY_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("GeneratorsStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_GENERATORS_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("GeneratorsFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_GENERATORS_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDSecurityStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_SECURITY_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDSecurityFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDGeneratorsStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_GENERATORS_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDGeneratorsFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDUnitsLoadStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START]),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDUnitsLoadFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH]),
+                SD_JSON_BUILD_PAIR_CONDITION(m->show_status_overridden != _SHOW_STATUS_INVALID, "ShowStatus", SD_JSON_BUILD_BOOLEAN(manager_get_show_status_on(m))),
+                JSON_BUILD_PAIR_CALLBACK_NON_NULL("LogLevel", log_level_build_runtime_json, m),
+                SD_JSON_BUILD_PAIR_CONDITION(m->log_target_overridden, "LogTarget", SD_JSON_BUILD_STRING(log_target_to_string(log_get_target()))),
+                SD_JSON_BUILD_PAIR_UNSIGNED("NNames", hashmap_size(m->units)),
+                SD_JSON_BUILD_PAIR_UNSIGNED("NFailedUnits", set_size(m->failed_units)),
+                SD_JSON_BUILD_PAIR_UNSIGNED("NJobs", hashmap_size(m->jobs)),
+                SD_JSON_BUILD_PAIR_UNSIGNED("NInstalledJobs", m->n_installed_jobs),
+                SD_JSON_BUILD_PAIR_UNSIGNED("NFailedJobs", m->n_failed_jobs),
+                SD_JSON_BUILD_PAIR_REAL("Progress", manager_get_progress(m)),
+                JSON_BUILD_PAIR_CALLBACK_NON_NULL("Environment", manager_environment_build_json, m),
+                JSON_BUILD_PAIR_STRING_NON_EMPTY("WatchdogDevice", watchdog_get_device()),
+                JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("WatchdogLastPingTimestamp", &watchdog_last_ping),
+                JSON_BUILD_PAIR_STRING_NON_EMPTY("ControlGroup", m->cgroup_root),
+                SD_JSON_BUILD_PAIR_STRING("SystemState", manager_state_to_string(manager_state(m))),
+                SD_JSON_BUILD_PAIR_UNSIGNED("ExitCode", m->return_value));
+}
+
+int vl_method_describe_manager(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) {
+        _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
+        Manager *manager = ASSERT_PTR(userdata);
+        int r;
+
+        assert(parameters);
+
+        if (sd_json_variant_elements(parameters) > 0)
+                return sd_varlink_error_invalid_parameter(link, parameters);
+
+        r = sd_json_buildo(&v,
+                        SD_JSON_BUILD_PAIR_CALLBACK("Context", manager_context_build_json, manager),
+                        SD_JSON_BUILD_PAIR_CALLBACK("Runtime", manager_runtime_build_json, manager));
+        if (r < 0)
+                return log_error_errno(r, "Failed to build manager JSON data: %m");
+
+        return sd_varlink_reply(link, v);
+}

src/core/manager-varlink.h

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-json.h"
+#include "sd-varlink.h"
+
+int vl_method_describe_manager(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata);

src/core/meson.build

@@ -45,6 +45,7 @@ libcore_sources = files(
         'load-fragment.c',
         'manager-dump.c',
         'manager-serialize.c',
+        'manager-varlink.c',
         'manager.c',
         'mount.c',
         'namespace.c',
@@ -63,7 +64,9 @@ libcore_sources = files(
         'unit-dependency-atom.c',
         'unit-printf.c',
         'unit-serialize.c',
+        'unit-varlink.c',
         'unit.c',
+        'varlink-common.c',
 )
 
 if conf.get('BPF_FRAMEWORK') == 1

src/core/unit-varlink.h

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-varlink.h"
+
+int vl_method_list_units(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata);

src/core/varlink-common.c

@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "json-util.h"
+#include "rlimit-util.h"
+#include "varlink-common.h"
+
+int rlimit_build_json(sd_json_variant **ret, const char *name, void *userdata) {
+        const struct rlimit *rl = userdata;
+        struct rlimit buf = {};
+        int r;
+
+        assert(ret);
+        assert(name);
+
+        if (!rl) {
+                const char *p;
+                int z;
+
+                /* Skip over any prefix, such as "Default" */
+                assert_se(p = strstrafter(name, "Limit"));
+
+                z = rlimit_from_string(p);
+                assert(z >= 0 && z < _RLIMIT_MAX);
+
+                r = getrlimit(z, &buf);
+                if (r < 0) {
+                        log_debug_errno(errno, "Failed to getrlimit(%s), ignoring: %m", name);
+                        return 0;
+                }
+
+                rl = &buf;
+        }
+
+        if (rl->rlim_cur == RLIM_INFINITY && rl->rlim_max == RLIM_INFINITY)
+                return 0;
+
+        /* rlim_t might have different sizes, let's map RLIMIT_INFINITY to UINT64_MAX, so that it is the same
+         * on all archs */
+        return sd_json_buildo(ret,
+                        JSON_BUILD_PAIR_UNSIGNED_NOT_EQUAL("soft", rl->rlim_cur, RLIM_INFINITY),
+                        JSON_BUILD_PAIR_UNSIGNED_NOT_EQUAL("hard", rl->rlim_max, RLIM_INFINITY));
+}

src/core/varlink-common.h

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-json.h"
+#include "sd-varlink.h"
+
+int rlimit_build_json(sd_json_variant **ret, const char *name, void *userdata);

src/cryptsetup/cryptsetup-pkcs11.c

@@ -16,6 +16,7 @@
 #include "fileio.h"
 #include "format-util.h"
 #include "hexdecoct.h"
+#include "iovec-util.h"
 #include "macro.h"
 #include "memory-util.h"
 #include "parse-util.h"
@@ -31,8 +32,7 @@ int decrypt_pkcs11_key(
                 const char *key_file,         /* We either expect key_file and associated parameters to be set (for file keys) … */
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,         /* … or key_data and key_data_size (for literal keys) */
+                const struct iovec *key_data, /* … or literal keys via key_data */
-                size_t key_data_size,
                 usec_t until,
                 AskPasswordFlags askpw_flags,
                 void **ret_decrypted_key,
@@ -47,15 +47,15 @@ int decrypt_pkcs11_key(
 
         assert(friendly_name);
         assert(pkcs11_uri);
-        assert(key_file || key_data);
+        assert(key_file || iovec_is_set(key_data));
         assert(ret_decrypted_key);
         assert(ret_decrypted_key_size);
 
         /* The functions called here log about all errors, except for EAGAIN which means "token not found right now" */
 
-        if (key_data) {
+        if (iovec_is_set(key_data)) {
-                data.encrypted_key = (void*) key_data;
+                data.encrypted_key = (void*) key_data->iov_base;
-                data.encrypted_key_size = key_data_size;
+                data.encrypted_key_size = key_data->iov_len;
 
                 data.free_encrypted_key = false;
         } else {

src/cryptsetup/cryptsetup-pkcs11.h

@@ -16,8 +16,7 @@ int decrypt_pkcs11_key(
                 const char *key_file,
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 AskPasswordFlags askpw_flags,
                 void **ret_decrypted_key,
@@ -39,8 +38,7 @@ static inline int decrypt_pkcs11_key(
                 const char *key_file,
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 AskPasswordFlags askpw_flags,
                 void **ret_decrypted_key,

src/cryptsetup/cryptsetup.c

@@ -1471,8 +1471,7 @@ static int attach_luks_or_plain_or_bitlk_by_fido2(
                 struct crypt_device *cd,
                 const char *name,
                 const char *key_file,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 uint32_t flags,
                 bool pass_volume_key) {
@@ -1489,7 +1488,7 @@ static int attach_luks_or_plain_or_bitlk_by_fido2(
         assert(name);
         assert(arg_fido2_device || arg_fido2_device_auto);
 
-        if (arg_fido2_cid && !key_file && !key_data)
+        if (arg_fido2_cid && !key_file && !iovec_is_set(key_data))
                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                         "FIDO2 mode with manual parameters selected, but no keyfile specified, refusing.");
 
@@ -1513,7 +1512,7 @@ static int attach_luks_or_plain_or_bitlk_by_fido2(
                                                 arg_fido2_rp_id,
                                                 arg_fido2_cid, arg_fido2_cid_size,
                                                 key_file, arg_keyfile_size, arg_keyfile_offset,
-                                                key_data, key_data_size,
+                                                key_data,
                                                 until,
                                                 arg_fido2_manual_flags,
                                                 "cryptsetup.fido2-pin",
@@ -1623,8 +1622,7 @@ static int attach_luks_or_plain_or_bitlk_by_pkcs11(
                 struct crypt_device *cd,
                 const char *name,
                 const char *key_file,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 uint32_t flags,
                 bool pass_volume_key) {
@@ -1635,6 +1633,7 @@ static int attach_luks_or_plain_or_bitlk_by_pkcs11(
         _cleanup_(erase_and_freep) void *decrypted_key = NULL;
         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
         _cleanup_free_ void *discovered_key = NULL;
+        struct iovec discovered_key_data = {};
         int keyslot = arg_key_slot, r;
         const char *uri = NULL;
         bool use_libcryptsetup_plugin = use_token_plugins();
@@ -1653,13 +1652,13 @@ static int attach_luks_or_plain_or_bitlk_by_pkcs11(
                                 return r;
 
                         uri = discovered_uri;
-                        key_data = discovered_key;
+                        discovered_key_data = IOVEC_MAKE(discovered_key, discovered_key_size);
-                        key_data_size = discovered_key_size;
+                        key_data = &discovered_key_data;
                 }
         } else {
                 uri = arg_pkcs11_uri;
 
-                if (!key_file && !key_data)
+                if (!key_file && !iovec_is_set(key_data))
                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "PKCS#11 mode selected but no key file specified, refusing.");
         }
 
@@ -1682,7 +1681,7 @@ static int attach_luks_or_plain_or_bitlk_by_pkcs11(
                                         friendly,
                                         uri,
                                         key_file, arg_keyfile_size, arg_keyfile_offset,
-                                        key_data, key_data_size,
+                                        key_data,
                                         until,
                                         arg_ask_password_flags,
                                         &decrypted_key, &decrypted_key_size);
@@ -2231,9 +2230,9 @@ static int attach_luks_or_plain_or_bitlk(
         if (token_type == TOKEN_TPM2)
                 return attach_luks_or_plain_or_bitlk_by_tpm2(cd, name, key_file, key_data, until, flags, pass_volume_key);
         if (token_type == TOKEN_FIDO2)
-                return attach_luks_or_plain_or_bitlk_by_fido2(cd, name, key_file, key_data->iov_base, key_data->iov_len, until, flags, pass_volume_key);
+                return attach_luks_or_plain_or_bitlk_by_fido2(cd, name, key_file, key_data, until, flags, pass_volume_key);
         if (token_type == TOKEN_PKCS11)
-                return attach_luks_or_plain_or_bitlk_by_pkcs11(cd, name, key_file, key_data->iov_base, key_data->iov_len, until, flags, pass_volume_key);
+                return attach_luks_or_plain_or_bitlk_by_pkcs11(cd, name, key_file, key_data, until, flags, pass_volume_key);
         if (key_data)
                 return attach_luks_or_plain_or_bitlk_by_key_data(cd, name, key_data, flags, pass_volume_key);
         if (key_file)

src/libsystemd/sd-varlink/sd-varlink.c

@@ -1698,7 +1698,8 @@ _public_ int sd_varlink_get_events(sd_varlink *v) {
                 ret |= EPOLLIN;
 
         if (!v->write_disconnected &&
-            v->output_buffer_size > 0)
+            (v->output_queue ||
+             v->output_buffer_size > 0))
                 ret |= EPOLLOUT;
 
         return ret;

src/shared/cryptsetup-fido2.c

@@ -24,8 +24,7 @@ int acquire_fido2_key(
                 const char *key_file,
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 Fido2EnrollFlags required,
                 const char *askpw_credential,
@@ -45,10 +44,10 @@ int acquire_fido2_key(
                                         "Local verification is required to unlock this volume, but the 'headless' parameter was set.");
 
         assert(cid);
-        assert(key_file || key_data);
+        assert(key_file || iovec_is_set(key_data));
 
-        if (key_data)
+        if (iovec_is_set(key_data))
-                salt = IOVEC_MAKE(key_data, key_data_size);
+                salt = *key_data;
         else {
                 if (key_file_size > 0)
                         log_debug("Ignoring 'keyfile-size=' option for a FIDO2 salt file.");
@@ -252,7 +251,7 @@ int acquire_fido2_key_auto(
                                 /* key_file= */ NULL, /* salt is read from LUKS header instead of key_file */
                                 /* key_file_size= */ 0,
                                 /* key_file_offset= */ 0,
-                                salt, salt_size,
+                                &IOVEC_MAKE(salt, salt_size),
                                 until,
                                 required,
                                 "cryptsetup.fido2-pin",

src/shared/cryptsetup-fido2.h

@@ -20,8 +20,7 @@ int acquire_fido2_key(
                 const char *key_file,
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 Fido2EnrollFlags required,
                 const char *askpw_credential,
@@ -52,8 +51,7 @@ static inline int acquire_fido2_key(
                 const char *key_file,
                 size_t key_file_size,
                 uint64_t key_file_offset,
-                const void *key_data,
+                const struct iovec *key_data,
-                size_t key_data_size,
                 usec_t until,
                 Fido2EnrollFlags required,
                 const char *askpw_credential,

src/shared/meson.build

@@ -185,6 +185,7 @@ shared_sources = files(
         'varlink-io.systemd.Machine.c',
         'varlink-io.systemd.MachineImage.c',
         'varlink-io.systemd.ManagedOOM.c',
+        'varlink-io.systemd.Manager.c',
         'varlink-io.systemd.MountFileSystem.c',
         'varlink-io.systemd.NamespaceResource.c',
         'varlink-io.systemd.Network.c',
@@ -192,6 +193,7 @@ shared_sources = files(
         'varlink-io.systemd.PCRLock.c',
         'varlink-io.systemd.Resolve.c',
         'varlink-io.systemd.Resolve.Monitor.c',
+        'varlink-io.systemd.Unit.c',
         'varlink-io.systemd.UserDatabase.c',
         'varlink-io.systemd.oom.c',
         'varlink-io.systemd.service.c',

src/shared/nsflags.c

@@ -7,6 +7,7 @@
 #include "namespace-util.h"
 #include "nsflags.h"
 #include "string-util.h"
+#include "strv.h"
 
 int namespace_flags_from_string(const char *name, unsigned long *ret) {
         unsigned long flags = 0;
@@ -42,18 +43,20 @@ int namespace_flags_from_string(const char *name, unsigned long *ret) {
 }
 
 int namespace_flags_to_string(unsigned long flags, char **ret) {
+        _cleanup_strv_free_ char **l = NULL;
         _cleanup_free_ char *s = NULL;
-        unsigned i;
+        int r;
 
-        for (i = 0; namespace_info[i].proc_name; i++) {
+        r = namespace_flags_to_strv(flags, &l);
-                if ((flags & namespace_info[i].clone_flag) != namespace_info[i].clone_flag)
+        if (r < 0)
-                        continue;
+                return r;
 
-                if (!strextend_with_separator(&s, " ", namespace_info[i].proc_name))
+        s = strv_join(l, NULL);
-                        return -ENOMEM;
+        if (!s)
-        }
+                return -ENOMEM;
 
-        *ret = TAKE_PTR(s);
+        if (ret)
+                *ret = TAKE_PTR(s);
 
         return 0;
 }
@@ -65,3 +68,23 @@ const char* namespace_single_flag_to_string(unsigned long flag) {
 
         return NULL;
 }
+
+int namespace_flags_to_strv(unsigned long flags, char ***ret) {
+        _cleanup_strv_free_ char **s = NULL;
+        unsigned i;
+        int r;
+
+        for (i = 0; namespace_info[i].proc_name; i++) {
+                if ((flags & namespace_info[i].clone_flag) != namespace_info[i].clone_flag)
+                        continue;
+
+                r = strv_extend(&s, namespace_info[i].proc_name);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ret)
+                *ret = TAKE_PTR(s);
+
+        return 0;
+}

src/shared/nsflags.h

@@ -20,4 +20,5 @@
 
 int namespace_flags_from_string(const char *name, unsigned long *ret);
 int namespace_flags_to_string(unsigned long flags, char **ret);
+int namespace_flags_to_strv(unsigned long flags, char ***ret);
 const char* namespace_single_flag_to_string(unsigned long flag);

src/shared/varlink-idl-common.c

@@ -19,3 +19,17 @@ SD_VARLINK_DEFINE_STRUCT_TYPE(
                 SD_VARLINK_DEFINE_FIELD(pidfdId, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("Boot ID of the system the inode number belongs to"),
                 SD_VARLINK_DEFINE_FIELD(bootId, SD_VARLINK_INT, SD_VARLINK_NULLABLE));
+
+SD_VARLINK_DEFINE_STRUCT_TYPE(
+                RateLimit,
+                SD_VARLINK_FIELD_COMMENT("The ratelimit interval"),
+                SD_VARLINK_DEFINE_FIELD(intervalUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("The ratelimit burst"),
+                SD_VARLINK_DEFINE_FIELD(burst, SD_VARLINK_INT, 0));
+
+SD_VARLINK_DEFINE_STRUCT_TYPE(
+                ResourceLimit,
+                SD_VARLINK_FIELD_COMMENT("The soft resource limit"),
+                SD_VARLINK_DEFINE_FIELD(soft, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("The hard resource limit"),
+                SD_VARLINK_DEFINE_FIELD(hard, SD_VARLINK_INT, SD_VARLINK_NULLABLE));

src/shared/varlink-idl-common.h

@@ -5,3 +5,5 @@
 
 extern const sd_varlink_symbol vl_type_Timestamp;
 extern const sd_varlink_symbol vl_type_ProcessId;
+extern const sd_varlink_symbol vl_type_RateLimit;
+extern const sd_varlink_symbol vl_type_ResourceLimit;

src/shared/varlink-io.systemd.Manager.c

@@ -0,0 +1,224 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "build.h"
+#include "varlink-idl-common.h"
+#include "varlink-io.systemd.Manager.h"
+
+static SD_VARLINK_DEFINE_STRUCT_TYPE(
+                LogLevelStruct,
+                SD_VARLINK_FIELD_COMMENT("'console' target log level"),
+                SD_VARLINK_DEFINE_FIELD(console, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("'kmsg' target log level"),
+                SD_VARLINK_DEFINE_FIELD(kmsg, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("'syslog' target log level"),
+                SD_VARLINK_DEFINE_FIELD(syslog, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("'journal' target log level"),
+                SD_VARLINK_DEFINE_FIELD(journal, SD_VARLINK_STRING, 0));
+
+/* The split between ManagerContext and ManagerRuntime follows the rule:
+ * - Context is what cannot change once configuration is loaded. You can think about context settings as constants.
+ * - Runtime is changable settings at runtime, in other words - variables. */
+
+static SD_VARLINK_DEFINE_STRUCT_TYPE(
+                ManagerContext,
+                SD_VARLINK_FIELD_COMMENT("The version string of the running systemd instance"),
+                SD_VARLINK_DEFINE_FIELD(Version, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("A short ID string describing the architecture the systemd instance is running on"),
+                SD_VARLINK_DEFINE_FIELD(Architecture, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("The features that have been enabled and disabled for this build"),
+                SD_VARLINK_DEFINE_FIELD(Features, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("Whether systemd will show status messages on the system console"),
+                SD_VARLINK_DEFINE_FIELD(ShowStatus, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("The unit search path"),
+                SD_VARLINK_DEFINE_FIELD(UnitPath, SD_VARLINK_STRING, SD_VARLINK_ARRAY),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#LogColor="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(LogLevel, LogLevelStruct, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/latest/systemd-system.conf.html#LogColor="),
+                SD_VARLINK_DEFINE_FIELD(LogTarget, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/latest/systemd-system.conf.html#ManagerEnvironment="),
+                SD_VARLINK_DEFINE_FIELD(Environment, SD_VARLINK_STRING, SD_VARLINK_ARRAY|SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultStandardOutput="),
+                SD_VARLINK_DEFINE_FIELD(DefaultStandardOutput, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultStandardError="),
+                SD_VARLINK_DEFINE_FIELD(DefaultStandardError, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#RuntimeWatchdogSec="),
+                SD_VARLINK_DEFINE_FIELD(RuntimeWatchdogUSec, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#RuntimeWatchdogPreSec="),
+                SD_VARLINK_DEFINE_FIELD(RuntimeWatchdogPreUSec, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#RuntimeWatchdogPreGovernor="),
+                SD_VARLINK_DEFINE_FIELD(RuntimeWatchdogPreGovernor, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#RebootWatchdogSec="),
+                SD_VARLINK_DEFINE_FIELD(RebootWatchdogUSec, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#KExecWatchdogSec="),
+                SD_VARLINK_DEFINE_FIELD(KExecWatchdogUSec, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#ServiceWatchdogs="),
+                SD_VARLINK_DEFINE_FIELD(ServiceWatchdogs, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTimerAccuracySec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTimerAccuracyUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTimeoutStartSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTimeoutStartUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTimeoutStopSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTimeoutStopUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTimeoutAbortSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTimeoutAbortUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultDeviceTimeoutSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultDeviceTimeoutUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultRestartSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultRestartUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultStartLimit="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultStartLimit, RateLimit, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultCPUAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultCPUAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultBlockIOAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultBlockIOAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultIOAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultIOAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultIPAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultIPAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultMemoryAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultMemoryAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTasksAccounting="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTasksAccounting, SD_VARLINK_BOOL, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitCPU="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitCPU, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitFSIZE="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitFSIZE, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitDATA="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitDATA, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitSTACK="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitSTACK, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitCORE="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitCORE, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitRSS="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitRSS, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitNOFILE="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitNOFILE, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitAS="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitAS, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitNPROC="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitNPROC, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitMEMLOCK="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitMEMLOCK, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitLOCKS="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitLOCKS, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitSIGPENDING="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitSIGPENDING, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitMSGQUEUE="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitMSGQUEUE, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitNICE="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitNICE, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitRTPRIO="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitRTPRIO, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultLimitRTTIME="),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(DefaultLimitRTTIME, ResourceLimit, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultTasksMax="),
+                SD_VARLINK_DEFINE_FIELD(DefaultTasksMax, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultMemoryPressureThresholdUSec="),
+                SD_VARLINK_DEFINE_FIELD(DefaultMemoryPressureThresholdUSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultMemoryPressureWatch="),
+                SD_VARLINK_DEFINE_FIELD(DefaultMemoryPressureWatch, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#TimerSlackNSec="),
+                SD_VARLINK_DEFINE_FIELD(TimerSlackNSec, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultOOMPolicy="),
+                SD_VARLINK_DEFINE_FIELD(DefaultOOMPolicy, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#DefaultOOMScoreAdjust="),
+                SD_VARLINK_DEFINE_FIELD(DefaultOOMScoreAdjust, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("https://www.freedesktop.org/software/systemd/man/"PROJECT_VERSION_STR"/systemd-system.conf.html#CtrlAltDelBurstAction="),
+                SD_VARLINK_DEFINE_FIELD(CtrlAltDelBurstAction, SD_VARLINK_STRING, 0));
+
+static SD_VARLINK_DEFINE_STRUCT_TYPE(
+                ManagerRuntime,
+                SD_VARLINK_FIELD_COMMENT("A short ID string describing the virtualization technology the system runs in"),
+                SD_VARLINK_DEFINE_FIELD(Virtualization, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("A short ID string describing the confidential virtualization technology the system runs in"),
+                SD_VARLINK_DEFINE_FIELD(ConfidentialVirtualization, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("An array of strings describing the taints applied to the running system"),
+                SD_VARLINK_DEFINE_FIELD(Taints, SD_VARLINK_STRING, SD_VARLINK_ARRAY),
+                SD_VARLINK_FIELD_COMMENT("The console on which systemd asks for confirmation when spawning processes"),
+                SD_VARLINK_DEFINE_FIELD(ConfirmSpawn, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the firmware first began execution"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(FirmwareTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the boot loader first began execution"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(LoaderTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the kernel first began execution"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(KernelTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the initrd first began execution"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the initrd first began execution"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(UserspaceTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the system finished booting up"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(FinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager started uploading security policies to the kernel"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(SecurityStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager finished uploading security policies to the kernel"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(SecurityFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager started executing generators"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(GeneratorsStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager finished executing generators"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(GeneratorsFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager first started loading units"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(UnitsLoadStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager first finished loading units"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(UnitsLoadFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager last started loading units"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(UnitsLoadTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager started uploading security policies to the kernel in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDSecurityStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager finished uploading security policies to the kernel in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDSecurityFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager started executing generators in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDGeneratorsStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager finished executing generators in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDGeneratorsFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager first started loading units in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDUnitsLoadStartTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the manager first finished loading units in the initrd"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(InitRDUnitsLoadFinishTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("The current show status of the manager"),
+                SD_VARLINK_DEFINE_FIELD(ShowStatus, SD_VARLINK_BOOL, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("The current log level of the manager"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(LogLevel, LogLevelStruct, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("The current log target of the manager"),
+                SD_VARLINK_DEFINE_FIELD(LogTarget, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("The amount of unique unit names currently loaded"),
+                SD_VARLINK_DEFINE_FIELD(NNames, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("The amount of failed units"),
+                SD_VARLINK_DEFINE_FIELD(NFailedUnits, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("The amount of currently queued jobs"),
+                SD_VARLINK_DEFINE_FIELD(NJobs, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("The total amount of queued jobs"),
+                SD_VARLINK_DEFINE_FIELD(NInstalledJobs, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("The total amount of failed jobs"),
+                SD_VARLINK_DEFINE_FIELD(NFailedJobs, SD_VARLINK_INT, 0),
+                SD_VARLINK_FIELD_COMMENT("Boot progress as a floating point value between 0.0 and 1.0"),
+                SD_VARLINK_DEFINE_FIELD(Progress, SD_VARLINK_FLOAT, 0),
+                SD_VARLINK_FIELD_COMMENT("The manager environment variables"),
+                SD_VARLINK_DEFINE_FIELD(Environment, SD_VARLINK_STRING, SD_VARLINK_ARRAY),
+                SD_VARLINK_FIELD_COMMENT("The hardware watchdog device currently in use"),
+                SD_VARLINK_DEFINE_FIELD(WatchdogDevice, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Timestamp when the hardware watchdog was last pinged"),
+                SD_VARLINK_DEFINE_FIELD_BY_TYPE(WatchdogLastPingTimestamp, Timestamp, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Root of the control group hierarchy that the manager is running in"),
+                SD_VARLINK_DEFINE_FIELD(ControlGroup, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_FIELD_COMMENT("Current state of the system"),
+                SD_VARLINK_DEFINE_FIELD(SystemState, SD_VARLINK_STRING, 0),
+                SD_VARLINK_FIELD_COMMENT("Exit code of the manager"),
+                SD_VARLINK_DEFINE_FIELD(ExitCode, SD_VARLINK_INT, 0));
+
+static SD_VARLINK_DEFINE_METHOD(
+                Describe,
+                SD_VARLINK_FIELD_COMMENT("Configuration of the manager"),
+                SD_VARLINK_DEFINE_OUTPUT_BY_TYPE(Context, ManagerContext, 0),
+                SD_VARLINK_FIELD_COMMENT("Runtime information of the manager"),
+                SD_VARLINK_DEFINE_OUTPUT_BY_TYPE(Runtime, ManagerRuntime, 0));
+
+SD_VARLINK_DEFINE_INTERFACE(
+                io_systemd_Manager,
+                "io.systemd.Manager",
+                &vl_method_Describe,
+                &vl_type_ManagerContext,
+                &vl_type_ManagerRuntime,
+                &vl_type_Timestamp,
+                &vl_type_ResourceLimit,
+                &vl_type_RateLimit,
+                &vl_type_LogLevelStruct);

src/shared/varlink-io.systemd.Manager.h

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-varlink-idl.h"
+
+extern const sd_varlink_interface vl_interface_io_systemd_Manager;

src/shared/varlink-io.systemd.Unit.h

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-varlink-idl.h"
+
+extern const sd_varlink_interface vl_interface_io_systemd_Unit;

src/shared/varlink-serialize.c

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include "parse-util.h"
+#include "path-util.h"
 #include "varlink-internal.h"
 #include "varlink-serialize.h"
 
@@ -83,3 +84,14 @@ int varlink_server_deserialize_one(sd_varlink_server *s, const char *value, FDSe
         LIST_PREPEND(sockets, s->sockets, TAKE_PTR(ss));
         return 0;
 }
+
+int varlink_server_contains_socket(sd_varlink_server *s, const char *address) {
+        assert(s);
+        assert(address);
+
+        LIST_FOREACH(sockets, ss, s->sockets)
+                if (path_equal(ss->address, address))
+                        return true;
+
+        return false;
+}

src/shared/varlink-serialize.h

@@ -9,3 +9,5 @@
 
 int varlink_server_serialize(sd_varlink_server *s, FILE *f, FDSet *fds);
 int varlink_server_deserialize_one(sd_varlink_server *s, const char *value, FDSet *fds);
+
+int varlink_server_contains_socket(sd_varlink_server *s, const char *address);

src/sysext/sysext.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <linux/loop.h>
@@ -45,6 +46,7 @@
 #include "process-util.h"
 #include "rm-rf.h"
 #include "sort-util.h"
+#include "selinux-util.h"
 #include "string-table.h"
 #include "string-util.h"
 #include "terminal-util.h"
@@ -899,6 +901,7 @@ static int resolve_mutable_directory(
         _cleanup_free_ char *path = NULL, *resolved_path = NULL, *dir_name = NULL;
         const char *root = arg_root, *base = MUTABLE_EXTENSIONS_BASE_DIR;
         int r;
+        _cleanup_close_ int atfd = -EBADF;
 
         assert(hierarchy);
         assert(ret_resolved_mutable_directory);
@@ -943,6 +946,14 @@ static int resolve_mutable_directory(
                 r = mkdir_p(path_in_root, 0700);
                 if (r < 0)
                         return log_error_errno(r, "Failed to create a directory '%s': %m", path_in_root);
+
+                atfd = open(path_in_root, O_DIRECTORY|O_CLOEXEC);
+                if (atfd < 0)
+                        return log_error_errno(errno, "Failed to open directory '%s': %m", path_in_root);
+
+                r = mac_selinux_fix_full(atfd, NULL, hierarchy, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", path_in_root);
         }
 
         r = chase(path, root, CHASE_PREFIX_ROOT, &resolved_path, NULL);
@@ -1289,6 +1300,7 @@ static int mount_overlayfs_with_op(
 
         int r;
         const char *top_layer = NULL;
+        _cleanup_close_ int atfd = -EBADF;
 
         assert(op);
         assert(overlay_path);
@@ -1301,10 +1313,28 @@ static int mount_overlayfs_with_op(
         if (r < 0)
                 return log_error_errno(r, "Failed to make directory '%s': %m", meta_path);
 
+        atfd = open(meta_path, O_DIRECTORY|O_CLOEXEC);
+        if (atfd < 0)
+                return log_error_errno(errno, "Failed to open directory '%s': %m", meta_path);
+
+        r = mac_selinux_fix_full(atfd, NULL, op->hierarchy, 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", meta_path);
+
         if (op->upper_dir && op->work_dir) {
                 r = mkdir_p(op->work_dir, 0700);
                 if (r < 0)
                         return log_error_errno(r, "Failed to make directory '%s': %m", op->work_dir);
+                _cleanup_close_ int dfd = -EBADF;
+
+                dfd = open(op->work_dir, O_DIRECTORY|O_CLOEXEC);
+                if (dfd < 0)
+                        return log_error_errno(errno, "Failed to open directory '%s': %m", op->work_dir);
+
+                r = mac_selinux_fix_full(dfd, NULL, op->hierarchy, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", op->work_dir);
+
                 top_layer = op->upper_dir;
         } else {
                 assert(!strv_isempty(op->lower_dirs));
@@ -1325,7 +1355,7 @@ static int mount_overlayfs_with_op(
         return 0;
 }
 
-static int write_extensions_file(ImageClass image_class, char **extensions, const char *meta_path) {
+static int write_extensions_file(ImageClass image_class, char **extensions, const char *meta_path, const char *hierarchy) {
         _cleanup_free_ char *f = NULL, *buf = NULL;
         int r;
 
@@ -1343,14 +1373,15 @@ static int write_extensions_file(ImageClass image_class, char **extensions, cons
         if (!buf)
                 return log_oom();
 
-        r = write_string_file(f, buf, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MKDIR_0755);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, image_class_info[image_class].short_identifier_plural);
+        r = write_string_file_full(AT_FDCWD,f, buf, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MKDIR_0755|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write extension meta file '%s': %m", f);
 
         return 0;
 }
 
-static int write_dev_file(ImageClass image_class, const char *meta_path, const char *overlay_path) {
+static int write_dev_file(ImageClass image_class, const char *meta_path, const char *overlay_path, const char *hierarchy) {
         _cleanup_free_ char *f = NULL;
         struct stat st;
         int r;
@@ -1372,14 +1403,15 @@ static int write_dev_file(ImageClass image_class, const char *meta_path, const c
         /* Modifying the underlying layers while the overlayfs is mounted is technically undefined, but at
          * least it won't crash or deadlock, as per the kernel docs about overlayfs:
          * https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html#changes-to-underlying-filesystems */
-        r = write_string_file(f, FORMAT_DEVNUM(st.st_dev), WRITE_STRING_FILE_CREATE);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, image_class_info[image_class].short_identifier_plural);
+        r = write_string_file_full(AT_FDCWD, f, FORMAT_DEVNUM(st.st_dev), WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write '%s': %m", f);
 
         return 0;
 }
 
-static int write_work_dir_file(ImageClass image_class, const char *meta_path, const char *work_dir) {
+static int write_work_dir_file(ImageClass image_class, const char *meta_path, const char *work_dir, const char* hierarchy) {
         _cleanup_free_ char *escaped_work_dir_in_root = NULL, *f = NULL;
         char *work_dir_in_root = NULL;
         int r;
@@ -1406,7 +1438,8 @@ static int write_work_dir_file(ImageClass image_class, const char *meta_path, co
         escaped_work_dir_in_root = cescape(work_dir_in_root);
         if (!escaped_work_dir_in_root)
                 return log_oom();
-        r = write_string_file(f, escaped_work_dir_in_root, WRITE_STRING_FILE_CREATE);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, "work_dir");
+        r = write_string_file_full(AT_FDCWD, f, escaped_work_dir_in_root, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write '%s': %m", f);
 
@@ -1418,8 +1451,10 @@ static int store_info_in_meta(
                 char **extensions,
                 const char *meta_path,
                 const char *overlay_path,
-                const char *work_dir) {
+                const char *work_dir,
-
+                const char *hierarchy) {
+        _cleanup_free_ char *f = NULL;
+        _cleanup_close_ int atfd = -EBADF;
         int r;
 
         assert(extensions);
@@ -1427,15 +1462,32 @@ static int store_info_in_meta(
         assert(overlay_path);
         /* work_dir may be NULL */
 
-        r = write_extensions_file(image_class, extensions, meta_path);
+        f = path_join(meta_path, image_class_info[image_class].dot_directory_name);
+        if (!f)
+                return log_oom();
+
+        r = mkdir_p(f, 0755);
         if (r < 0)
                 return r;
 
-        r = write_dev_file(image_class, meta_path, overlay_path);
+        atfd = open(f, O_DIRECTORY|O_CLOEXEC);
+        if (atfd < 0)
+                return log_error_errno(errno, "Failed to open directory '%s': %m", f);
+
+        r = mac_selinux_fix_full(atfd, NULL, hierarchy, 0);
+
+        if (r < 0)
+                return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", hierarchy);
+
+        r = write_extensions_file(image_class, extensions, meta_path, hierarchy);
         if (r < 0)
                 return r;
 
-        r = write_work_dir_file(image_class, meta_path, work_dir);
+        r = write_dev_file(image_class, meta_path, overlay_path, hierarchy);
+        if (r < 0)
+                return r;
+
+        r = write_work_dir_file(image_class, meta_path, work_dir, hierarchy);
         if (r < 0)
                 return r;
 
@@ -1501,6 +1553,8 @@ static int merge_hierarchy(
         assert(overlay_path);
         assert(workspace_path);
 
+        mac_selinux_init();
+
         r = determine_used_extensions(hierarchy, paths, &used_paths, &extensions_used);
         if (r < 0)
                 return r;
@@ -1528,7 +1582,7 @@ static int merge_hierarchy(
         if (r < 0)
                 return r;
 
-        r = store_info_in_meta(image_class, extensions, meta_path, overlay_path, op->work_dir);
+        r = store_info_in_meta(image_class, extensions, meta_path, overlay_path, op->work_dir, op->hierarchy);
         if (r < 0)
                 return r;
 

src/sysupdate/updatectl.c

@@ -1414,7 +1414,7 @@ static int verb_enable(int argc, char **argv, void *userdata) {
                                        "SetFeatureEnabled",
                                        &error,
                                        /* reply= */ NULL,
-                                       "sbt",
+                                       "sit",
                                        *feature,
                                        (int) enable,
                                        UINT64_C(0));

src/test/test-varlink-idl.c

@@ -16,6 +16,7 @@
 #include "varlink-io.systemd.Journal.h"
 #include "varlink-io.systemd.Machine.h"
 #include "varlink-io.systemd.MachineImage.h"
+#include "varlink-io.systemd.Manager.h"
 #include "varlink-io.systemd.ManagedOOM.h"
 #include "varlink-io.systemd.MountFileSystem.h"
 #include "varlink-io.systemd.NamespaceResource.h"
@@ -24,6 +25,7 @@
 #include "varlink-io.systemd.PCRLock.h"
 #include "varlink-io.systemd.Resolve.h"
 #include "varlink-io.systemd.Resolve.Monitor.h"
+#include "varlink-io.systemd.Unit.h"
 #include "varlink-io.systemd.UserDatabase.h"
 #include "varlink-io.systemd.oom.h"
 #include "varlink-io.systemd.service.h"
@@ -193,6 +195,10 @@ TEST(parse_format) {
         print_separator();
         test_parse_format_one(&vl_interface_io_systemd_MachineImage);
         print_separator();
+        test_parse_format_one(&vl_interface_io_systemd_Manager);
+        print_separator();
+        test_parse_format_one(&vl_interface_io_systemd_Unit);
+        print_separator();
         test_parse_format_one(&vl_interface_xyz_test);
 }
 

src/udev/udev-ctrl.c

@@ -292,7 +292,7 @@ int udev_ctrl_start(UdevCtrl *uctrl, udev_ctrl_handler_t callback, void *userdat
 
 int udev_ctrl_send(UdevCtrl *uctrl, UdevCtrlMessageType type, const void *data) {
         UdevCtrlMessageWire ctrl_msg_wire = {
-                .version = "udev-" STRINGIFY(PROJECT_VERSION),
+                .version = "udev-" PROJECT_VERSION_STR,
                 .magic = UDEV_CTRL_MAGIC,
                 .type = type,
         };

src/udev/udevadm.h

@@ -19,6 +19,6 @@ int lock_main(int argc, char *argv[], void *userdata);
 
 static inline int print_version(void) {
         /* Dracut relies on the version being a single integer */
-        puts(STRINGIFY(PROJECT_VERSION));
+        puts(PROJECT_VERSION_STR);
         return 0;
 }

src/update-done/update-done.c

@@ -29,7 +29,7 @@ static int apply_timestamp(const char *path, struct timespec *ts) {
                      timespec_load_nsec(ts)) < 0)
                 return log_oom();
 
-        r = write_string_file_full(AT_FDCWD, path, message, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL, ts);
+        r = write_string_file_full(AT_FDCWD, path, message, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL, ts, NULL);
         if (r == -EROFS)
                 log_debug_errno(r, "Cannot create \"%s\", file system is read-only.", path);
         else if (r < 0)

test/units/TEST-13-NSPAWN.machined.sh

@@ -22,6 +22,11 @@ trap at_exit EXIT
 
 systemctl service-log-level systemd-machined debug
 systemctl service-log-level systemd-importd debug
+# per request in https://github.com/systemd/systemd/pull/35117
+systemctl edit --runtime --stdin 'systemd-nspawn@.service' --drop-in=debug.conf <<EOF
+[Service]
+Environment=SYSTEMD_LOG_LEVEL=debug
+EOF
 
 # Mount temporary directory over /var/lib/machines to not pollute the image
 mkdir -p /var/lib/machines
@@ -278,13 +283,13 @@ varlinkctl call /run/systemd/machine/io.systemd.Machine io.systemd.Machine.List
 # sending TRAP signal
 rm -f /var/lib/machines/long-running/trap
 varlinkctl call /run/systemd/machine/io.systemd.Machine io.systemd.Machine.Kill '{"name":"long-running", "whom": "leader", "signal": 5}'
-timeout 30 bash -c "until test -e /var/lib/machines/long-running/trap; do sleep .5; done"
+timeout 120 bash -c "until test -e /var/lib/machines/long-running/trap; do sleep .5; done"
 
 # test io.systemd.Machine.Terminate
 long_running_machine_start
 rm -f /var/lib/machines/long-running/terminate
 varlinkctl call /run/systemd/machine/io.systemd.Machine io.systemd.Machine.Terminate '{"name":"long-running"}'
-timeout 10 bash -c "until test -e /var/lib/machines/long-running/terminate; do sleep .5; done"
+timeout 30 bash -c "until test -e /var/lib/machines/long-running/terminate; do sleep .5; done"
 timeout 30 bash -c "while varlinkctl call /run/systemd/machine/io.systemd.Machine io.systemd.Machine.List '{\"name\":\"long-running\"}'; do sleep 0.5; done"
 
 # test io.systemd.Machine.Register
@@ -356,7 +361,7 @@ journalctl --sync
 machinectl terminate container-without-os-release
 machinectl terminate long-running
 # wait for the container being stopped, otherwise acquiring image metadata by io.systemd.MachineImage.List may fail in the below.
-timeout 10 bash -c "while machinectl status long-running &>/dev/null; do sleep .5; done"
+timeout 30 bash -c "while machinectl status long-running &>/dev/null; do sleep .5; done"
 systemctl kill --signal=KILL systemd-nspawn@long-running.service || :
 
 (ip addr show lo | grep -q 192.168.1.100) || ip address add 192.168.1.100/24 dev lo

test/units/TEST-74-AUX-UTILS.varlinkctl.sh

@@ -160,3 +160,24 @@ done
 varlinkctl info /run/systemd/io.systemd.Hostname
 varlinkctl introspect /run/systemd/io.systemd.Hostname io.systemd.Hostname
 varlinkctl call /run/systemd/io.systemd.Hostname io.systemd.Hostname.Describe '{}'
+
+# test io.systemd.Manager
+varlinkctl info /run/systemd/io.systemd.Manager
+varlinkctl introspect /run/systemd/io.systemd.Manager io.systemd.Manager
+varlinkctl call /run/systemd/io.systemd.Manager io.systemd.Manager.Describe '{}'
+
+# test io.system.Unit
+varlinkctl info /run/systemd/unit/io.systemd.Unit
+varlinkctl introspect /run/systemd/unit/io.systemd.Unit io.systemd.Unit
+varlinkctl --more call /run/systemd/unit/io.systemd.Unit io.systemd.Unit.List '{}'
+
+# test io.systemd.Manager in user manager
+systemctl start user@4711
+varlinkctl info /run/user/4711/systemd/io.systemd.Manager
+varlinkctl introspect /run/user/4711/systemd/io.systemd.Manager
+varlinkctl call /run/user/4711/systemd/io.systemd.Manager io.systemd.Manager.Describe '{}'
+
+# test io.systemd.Unit in user manager
+varlinkctl info /run/user/4711/systemd/unit/io.systemd.Unit
+varlinkctl introspect /run/user/4711/systemd/unit/io.systemd.Unit
+varlinkctl --more call /run/user/4711/systemd/unit/io.systemd.Unit io.systemd.Unit.List '{}'