service: when reloading a service fails don't fail the entire service but just the reload job

TODO

@@ -1,5 +1,7 @@
 Bugs:
 
+* Don't try to connect to dbus during early boot
+
 * Fix multiple reload statements
 
 * sometimes processes seem to remain when we kill a service

src/automount.c

@@ -244,7 +244,7 @@ static void automount_set_state(Automount *a, AutomountState state) {
                           automount_state_to_string(old_state),
                           automount_state_to_string(state));
 
-        unit_notify(UNIT(a), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(a), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int automount_coldplug(Unit *u) {

src/device.c

@@ -92,7 +92,7 @@ static void device_set_state(Device *d, DeviceState state) {
                           device_state_to_string(old_state),
                           device_state_to_string(state));
 
-        unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int device_coldplug(Unit *u) {

src/mount.c

@@ -554,7 +554,8 @@ static void mount_set_state(Mount *m, MountState state) {
                           mount_state_to_string(old_state),
                           mount_state_to_string(state));
 
-        unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
+        m->reload_failure = false;
 }
 
 static int mount_coldplug(Unit *u) {
@@ -910,7 +911,8 @@ static void mount_enter_remounting(Mount *m, bool success) {
 
 fail:
         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
-        mount_enter_mounted(m, false);
+        m->reload_failure = true;
+        mount_enter_mounted(m, true);
 }
 
 static int mount_start(Unit *u) {
@@ -1098,9 +1100,6 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
         case MOUNT_MOUNTING_DONE:
         case MOUNT_MOUNTING_SIGKILL:
         case MOUNT_MOUNTING_SIGTERM:
-        case MOUNT_REMOUNTING:
-        case MOUNT_REMOUNTING_SIGKILL:
-        case MOUNT_REMOUNTING_SIGTERM:
 
                 if (success)
                         mount_enter_mounted(m, true);
@@ -1110,6 +1109,18 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
                         mount_enter_dead(m, false);
                 break;
 
+        case MOUNT_REMOUNTING:
+        case MOUNT_REMOUNTING_SIGKILL:
+        case MOUNT_REMOUNTING_SIGTERM:
+
+                m->reload_failure = !success;
+                if (m->from_proc_self_mountinfo)
+                        mount_enter_mounted(m, true);
+                else
+                        mount_enter_dead(m, true);
+
+                break;
+
         case MOUNT_UNMOUNTING:
         case MOUNT_UNMOUNTING_SIGKILL:
         case MOUNT_UNMOUNTING_SIGTERM:
@@ -1147,7 +1158,8 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 
         case MOUNT_REMOUNTING:
                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
-                mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
+                m->reload_failure = true;
+                mount_enter_mounted(m, true);
                 break;
 
         case MOUNT_UNMOUNTING:

src/mount.h

@@ -79,6 +79,7 @@ struct Mount {
         bool just_changed:1;
 
         bool failure:1;
+        bool reload_failure:1;
 
         mode_t directory_mode;
 

src/path.c

@@ -279,7 +279,7 @@ static void path_set_state(Path *p, PathState state) {
                           path_state_to_string(old_state),
                           path_state_to_string(state));
 
-        unit_notify(UNIT(p), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(p), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static void path_enter_waiting(Path *p, bool initial, bool recheck);

src/service.c

@@ -1446,7 +1446,8 @@ static void service_set_state(Service *s, ServiceState state) {
         if (old_state != state)
                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
 
-        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
+        s->reload_failure = false;
 }
 
 static int service_coldplug(Unit *u) {
@@ -2120,7 +2121,8 @@ static void service_enter_reload(Service *s) {
 
 fail:
         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
-        service_enter_stop(s, false);
+        s->reload_failure = true;
+        service_enter_running(s, true);
 }
 
 static void service_run_next_control(Service *s, bool success) {
@@ -2161,7 +2163,10 @@ fail:
                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
         else if (s->state == SERVICE_STOP_POST)
                 service_enter_dead(s, false, true);
-        else
+        else if (s->state == SERVICE_RELOAD) {
+                s->reload_failure = true;
+                service_enter_running(s, true);
+        } else
                 service_enter_stop(s, false);
 }
 
@@ -2647,11 +2652,8 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
                                 /* Fall through */
 
                         case SERVICE_RELOAD:
-                                if (success)
+                                s->reload_failure = !success;
                                 service_enter_running(s, true);
-                                else
-                                        service_enter_running(s, false);
-
                                 break;
 
                         case SERVICE_STOP:
@@ -2701,11 +2703,16 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
                 break;
 
         case SERVICE_START_POST:
-        case SERVICE_RELOAD:
                 log_warning("%s operation timed out. Stopping.", u->meta.id);
                 service_enter_stop(s, false);
                 break;
 
+        case SERVICE_RELOAD:
+                log_warning("%s operation timed out. Stopping.", u->meta.id);
+                s->reload_failure = true;
+                service_enter_running(s, true);
+                break;
+
         case SERVICE_STOP:
                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);

src/service.h

@@ -118,6 +118,8 @@ struct Service {
 
         /* If we shut down, remember why */
         bool failure:1;
+        bool reload_failure:1;
+
         bool main_pid_known:1;
         bool bus_name_good:1;
         bool forbid_restart:1;

src/snapshot.c

@@ -45,7 +45,7 @@ static void snapshot_set_state(Snapshot *s, SnapshotState state) {
                           snapshot_state_to_string(old_state),
                           snapshot_state_to_string(state));
 
-        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int snapshot_load(Unit *u) {

src/socket.c

@@ -880,7 +880,7 @@ static void socket_set_state(Socket *s, SocketState state) {
                           socket_state_to_string(old_state),
                           socket_state_to_string(state));
 
-        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int socket_coldplug(Unit *u) {

src/swap.c

@@ -501,7 +501,7 @@ static void swap_set_state(Swap *s, SwapState state) {
                           swap_state_to_string(old_state),
                           swap_state_to_string(state));
 
-        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int swap_coldplug(Unit *u) {

src/target.c

@@ -49,7 +49,7 @@ static void target_set_state(Target *t, TargetState state) {
                           target_state_to_string(old_state),
                           target_state_to_string(state));
 
-        unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static int target_add_default_dependencies(Target *t) {

src/timer.c

@@ -152,7 +152,7 @@ static void timer_set_state(Timer *t, TimerState state) {
                           timer_state_to_string(old_state),
                           timer_state_to_string(state));
 
-        unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]);
+        unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
 }
 
 static void timer_enter_waiting(Timer *t, bool initial);

src/unit.c

@@ -1067,7 +1067,7 @@ static void retroactively_stop_dependencies(Unit *u) {
                         unit_check_unneeded(other);
 }
 
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
+void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
         dual_timestamp ts;
         bool unexpected;
 
@@ -1134,7 +1134,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
 
                         if (u->meta.job->state == JOB_RUNNING) {
                                 if (ns == UNIT_ACTIVE)
-                                        job_finish_and_invalidate(u->meta.job, true);
+                                        job_finish_and_invalidate(u->meta.job, reload_success);
                                 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
                                         unexpected = true;
 

src/unit.h

@@ -456,7 +456,7 @@ int unit_reload(Unit *u);
 
 int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error);
 
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns);
+void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
 
 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w);
 void unit_unwatch_fd(Unit *u, Watch *w);