Merge pull request #4710 from martinpitt/networkd-dbus

networkd: allow networkd to start in early boot

7 files changed, 128 insertions, 108 deletions

diff --git a/src/network/networkd-dhcp4.c b/src/network/networkd-dhcp4.c
index ca23c1c2a7..c5c5b95c8f 100644
--- a/src/network/networkd-dhcp4.c
+++ b/src/network/networkd-dhcp4.c
@@ -255,7 +255,7 @@ static int dhcp_lease_lost(Link *link) {
 
                 if (hostname) {
                         /* If a hostname was set due to the lease, then unset it now. */
-                        r = link_set_hostname(link, NULL);
+                        r = manager_set_hostname(link->manager, NULL);
                         if (r < 0)
                                 log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
                 }
@@ -439,7 +439,7 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
                         (void) sd_dhcp_lease_get_hostname(lease, &hostname);
 
                 if (hostname) {
-                        r = link_set_hostname(link, hostname);
+                        r = manager_set_hostname(link->manager, hostname);
                         if (r < 0)
                                 log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
                 }
@@ -451,7 +451,7 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
                 (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
 
                 if (tz) {
-                        r = link_set_timezone(link, tz);
+                        r = manager_set_timezone(link->manager, tz);
                         if (r < 0)
                                 log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
                 }
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index b38eec1ba7..cb7df633b7 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1175,109 +1175,6 @@ static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userd
         return 0;
 }
 
-static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
-        _cleanup_link_unref_ Link *link = userdata;
-        const sd_bus_error *e;
-
-        assert(m);
-        assert(link);
-
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
-                return 1;
-
-        e = sd_bus_message_get_error(m);
-        if (e)
-                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
-
-        return 1;
-}
-
-int link_set_hostname(Link *link, const char *hostname) {
-        int r;
-
-        assert(link);
-        assert(link->manager);
-
-        log_link_debug(link, "Setting transient hostname: '%s'", strna(hostname));
-
-        if (!link->manager->bus) {
-                /* TODO: replace by assert when we can rely on kdbus */
-                log_link_info(link, "Not connected to system bus, ignoring transient hostname.");
-                return 0;
-        }
-
-        r = sd_bus_call_method_async(
-                        link->manager->bus,
-                        NULL,
-                        "org.freedesktop.hostname1",
-                        "/org/freedesktop/hostname1",
-                        "org.freedesktop.hostname1",
-                        "SetHostname",
-                        set_hostname_handler,
-                        link,
-                        "sb",
-                        hostname,
-                        false);
-
-        if (r < 0)
-                return log_link_error_errno(link, r, "Could not set transient hostname: %m");
-
-        link_ref(link);
-
-        return 0;
-}
-
-static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
-        _cleanup_link_unref_ Link *link = userdata;
-        const sd_bus_error *e;
-
-        assert(m);
-        assert(link);
-
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
-                return 1;
-
-        e = sd_bus_message_get_error(m);
-        if (e)
-                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
-
-        return 1;
-}
-
-int link_set_timezone(Link *link, const char *tz) {
-        int r;
-
-        assert(link);
-        assert(link->manager);
-        assert(tz);
-
-        log_link_debug(link, "Setting system timezone: '%s'", tz);
-
-        if (!link->manager->bus) {
-                log_link_info(link, "Not connected to system bus, ignoring timezone.");
-                return 0;
-        }
-
-        r = sd_bus_call_method_async(
-                        link->manager->bus,
-                        NULL,
-                        "org.freedesktop.timedate1",
-                        "/org/freedesktop/timedate1",
-                        "org.freedesktop.timedate1",
-                        "SetTimezone",
-                        set_timezone_handler,
-                        link,
-                        "sb",
-                        tz,
-                        false);
-        if (r < 0)
-                return log_link_error_errno(link, r, "Could not set timezone: %m");
-
-        link_ref(link);
-
-        return 0;
-}
-
 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
         _cleanup_link_unref_ Link *link = userdata;
         int r;
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h
index 77f72d070e..e6190fbe57 100644
--- a/src/network/networkd-link.h
+++ b/src/network/networkd-link.h
@@ -159,8 +159,6 @@ bool link_has_carrier(Link *link);
 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 
 int link_set_mtu(Link *link, uint32_t mtu);
-int link_set_hostname(Link *link, const char *hostname);
-int link_set_timezone(Link *link, const char *timezone);
 
 int ipv4ll_configure(Link *link);
 int dhcp4_configure(Link *link);
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index c3d3f48a3f..4e3f9e35c6 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -192,6 +192,18 @@ int manager_connect_bus(Manager *m) {
         if (r < 0)
                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 
+       /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
+        if (m->dynamic_hostname) {
+                r = manager_set_hostname(m, m->dynamic_hostname);
+                if (r < 0)
+                        return r;
+        }
+        if (m->dynamic_timezone) {
+                r = manager_set_timezone(m, m->dynamic_timezone);
+                if (r < 0)
+                        return r;
+        }
+
         return 0;
 }
 
@@ -1119,6 +1131,9 @@ void manager_free(Manager *m) {
         sd_bus_slot_unref(m->prepare_for_sleep_slot);
         sd_event_source_unref(m->bus_retry_event_source);
 
+        free(m->dynamic_timezone);
+        free(m->dynamic_hostname);
+
         free(m);
 }
 
@@ -1365,3 +1380,96 @@ void manager_dirty(Manager *manager) {
         /* the serialized state in /run is no longer up-to-date */
         manager->dirty = true;
 }
+
+static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+        Manager *manager = userdata;
+        const sd_bus_error *e;
+
+        assert(m);
+        assert(manager);
+
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
+
+        return 1;
+}
+
+int manager_set_hostname(Manager *m, const char *hostname) {
+        int r;
+
+        log_debug("Setting transient hostname: '%s'", strna(hostname));
+        if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
+                return log_oom();
+
+        if (!m->bus) {
+                /* TODO: replace by assert when we can rely on kdbus */
+                log_info("Not connected to system bus, ignoring transient hostname.");
+                return 0;
+        }
+
+        r = sd_bus_call_method_async(
+                        m->bus,
+                        NULL,
+                        "org.freedesktop.hostname1",
+                        "/org/freedesktop/hostname1",
+                        "org.freedesktop.hostname1",
+                        "SetHostname",
+                        set_hostname_handler,
+                        m,
+                        "sb",
+                        hostname,
+                        false);
+
+        if (r < 0)
+                return log_error_errno(r, "Could not set transient hostname: %m");
+
+        return 0;
+}
+
+static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+        Manager *manager = userdata;
+        const sd_bus_error *e;
+
+        assert(m);
+        assert(manager);
+
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
+
+        return 1;
+}
+
+int manager_set_timezone(Manager *m, const char *tz) {
+        int r;
+
+        assert(m);
+        assert(tz);
+
+        log_debug("Setting system timezone: '%s'", tz);
+        if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
+                return log_oom();
+
+        if (!m->bus) {
+                log_info("Not connected to system bus, ignoring timezone.");
+                return 0;
+        }
+
+        r = sd_bus_call_method_async(
+                        m->bus,
+                        NULL,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetTimezone",
+                        set_timezone_handler,
+                        m,
+                        "sb",
+                        tz,
+                        false);
+        if (r < 0)
+                return log_error_errno(r, "Could not set timezone: %m");
+
+        return 0;
+}
diff --git a/src/network/networkd-manager.h b/src/network/networkd-manager.h
index a90d9a933f..c81f5057b7 100644
--- a/src/network/networkd-manager.h
+++ b/src/network/networkd-manager.h
@@ -63,6 +63,8 @@ struct Manager {
         usec_t network_dirs_ts_usec;
 
         DUID duid;
+        char* dynamic_hostname;
+        char* dynamic_timezone;
 };
 
 static inline const DUID* link_duid(const Link *link) {
@@ -97,5 +99,8 @@ int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, uni
 
 Link* manager_find_uplink(Manager *m, Link *exclude);
 
+int manager_set_hostname(Manager *m, const char *hostname);
+int manager_set_timezone(Manager *m, const char *timezone);
+
 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 #define _cleanup_manager_free_ _cleanup_(manager_freep)
diff --git a/src/network/systemd-networkd.pkla b/src/network/systemd-networkd.pkla
new file mode 100644
index 0000000000..fb257d933b
--- /dev/null
+++ b/src/network/systemd-networkd.pkla
@@ -0,0 +1,4 @@
+[Allow systemd-networkd to set timezone and transient hostname]
+Identity=unix-user:systemd-network
+Action=org.freedesktop.hostname1.set-hostname;org.freedesktop.timedate1.set-timezone;
+ResultAny=yes
diff --git a/src/network/systemd-networkd.rules b/src/network/systemd-networkd.rules
new file mode 100644
index 0000000000..2e4bc42bfb
--- /dev/null
+++ b/src/network/systemd-networkd.rules
@@ -0,0 +1,8 @@
+// Allow systemd-networkd to set timezone and transient hostname
+polkit.addRule(function(action, subject) {
+    if ((action.id == "org.freedesktop.hostname1.set-hostname" ||
+         action.id == "org.freedesktop.timedate1.set-timezone") &&
+        subject.user == "systemd-network") {
+        return polkit.Result.YES;
+    }
+});