From 7bc07eb6c9a31f2c26d0fe3e6d7a26a13cbb2369 Mon Sep 17 00:00:00 2001
From: Michal Schmidt <mschmidt@redhat.com>
Date: Thu, 16 Jul 2015 20:08:30 +0200
Subject: [PATCH] core: fix confusing logging of instantaneous jobs
For instantaneous jobs (e.g. starting of targets, sockets, slices, or
Type=simple services) the log shows the job completion
before starting:
systemd[1]: Created slice -.slice.
systemd[1]: Starting -.slice.
systemd[1]: Created slice System Slice.
systemd[1]: Starting System Slice.
systemd[1]: Listening on Journal Audit Socket.
systemd[1]: Starting Journal Audit Socket.
systemd[1]: Reached target Timers.
systemd[1]: Starting Timers.
...
The reason is that the job completes before the ->start() method returns
and only then does unit_start() print the "Starting ..." message.
The same thing happens when stopping units.
Rather than fixing the order of the messages, let's just not emit the
Starting/Stopping message at all when the job completes instantaneously.
The job completion message is sufficient in this case.
(cherry picked from commit d1a34ae9c20f1c02aab17884919eccef572b1d21)
Resolves: #1506256
---
src/core/job.c | 65 +++++++++++++++++++++++++++++++++++++++------------------
src/core/unit.c | 36 +++++++++++---------------------
src/core/unit.h | 1 +
3 files changed, 58 insertions(+), 44 deletions(-)
diff --git a/src/core/job.c b/src/core/job.c
index c9a43a4cb..612caa604 100644
--- a/src/core/job.c
+++ b/src/core/job.c
@@ -504,10 +504,48 @@ static void job_change_type(Job *j, JobType newtype) {
j->type = newtype;
}
+static int job_perform_on_unit(Job **j) {
+ /* While we execute this operation the job might go away (for
+ * example: because it finishes immediately or is replaced by a new,
+ * conflicting job.) To make sure we don't access a freed job later on
+ * we store the id here, so that we can verify the job is still
+ * valid. */
+ Manager *m = (*j)->manager;
+ Unit *u = (*j)->unit;
+ JobType t = (*j)->type;
+ uint32_t id = (*j)->id;
+ int r;
+
+ switch (t) {
+ case JOB_START:
+ r = unit_start(u);
+ break;
+
+ case JOB_RESTART:
+ t = JOB_STOP;
+ case JOB_STOP:
+ r = unit_stop(u);
+ break;
+
+ case JOB_RELOAD:
+ r = unit_reload(u);
+ break;
+
+ default:
+ assert_not_reached("Invalid job type");
+ }
+
+ /* Log if the job still exists and the start/stop/reload function
+ * actually did something. */
+ *j = manager_get_job(m, id);
+ if (*j && r > 0)
+ unit_status_emit_starting_stopping_reloading(u, t);
+
+ return r;
+}
+
int job_run_and_invalidate(Job *j) {
int r;
- uint32_t id;
- Manager *m = j->manager;
assert(j);
assert(j->installed);
@@ -526,23 +564,9 @@ int job_run_and_invalidate(Job *j) {
job_set_state(j, JOB_RUNNING);
job_add_to_dbus_queue(j);
- /* While we execute this operation the job might go away (for
- * example: because it is replaced by a new, conflicting
- * job.) To make sure we don't access a freed job later on we
- * store the id here, so that we can verify the job is still
- * valid. */
- id = j->id;
switch (j->type) {
- case JOB_START:
- r = unit_start(j->unit);
-
- /* If this unit cannot be started, then simply wait */
- if (r == -EBADR)
- r = 0;
- break;
-
case JOB_VERIFY_ACTIVE: {
UnitActiveState t = unit_active_state(j->unit);
if (UNIT_IS_ACTIVE_OR_RELOADING(t))
@@ -554,17 +578,19 @@ int job_run_and_invalidate(Job *j) {
break;
}
+ case JOB_START:
case JOB_STOP:
case JOB_RESTART:
- r = unit_stop(j->unit);
+ r = job_perform_on_unit(&j);
- /* If this unit cannot stopped, then simply wait. */
+ /* If the unit type does not support starting/stopping,
+ * then simply wait. */
if (r == -EBADR)
r = 0;
break;
case JOB_RELOAD:
- r = unit_reload(j->unit);
+ r = job_perform_on_unit(&j);
break;
case JOB_NOP:
@@ -575,7 +601,6 @@ int job_run_and_invalidate(Job *j) {
assert_not_reached("Unknown job type");
}
- j = manager_get_job(m, id);
if (j) {
if (r == -EALREADY)
r = job_finish_and_invalidate(j, JOB_DONE, true, true);
diff --git a/src/core/unit.c b/src/core/unit.c
index 6d535ae12..907a4bf7f 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -1417,6 +1417,15 @@ static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) {
NULL);
}
+void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) {
+
+ unit_status_log_starting_stopping_reloading(u, t);
+
+ /* Reload status messages have traditionally not been printed to console. */
+ if (t != JOB_RELOAD)
+ unit_status_print_starting_stopping(u, t);
+}
+
/* Errors:
* -EBADR: This unit type does not support starting.
* -EALREADY: Unit is already started.
@@ -1427,7 +1436,6 @@ static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) {
int unit_start(Unit *u) {
UnitActiveState state;
Unit *following;
- int r;
assert(u);
@@ -1481,14 +1489,7 @@ int unit_start(Unit *u) {
unit_add_to_dbus_queue(u);
- r = UNIT_VTABLE(u)->start(u);
- if (r <= 0)
- return r;
-
- /* Log if the start function actually did something */
- unit_status_log_starting_stopping_reloading(u, JOB_START);
- unit_status_print_starting_stopping(u, JOB_START);
- return r;
+ return UNIT_VTABLE(u)->start(u);
}
bool unit_can_start(Unit *u) {
@@ -1512,7 +1513,6 @@ bool unit_can_isolate(Unit *u) {
int unit_stop(Unit *u) {
UnitActiveState state;
Unit *following;
- int r;
assert(u);
@@ -1531,13 +1531,7 @@ int unit_stop(Unit *u) {
unit_add_to_dbus_queue(u);
- r = UNIT_VTABLE(u)->stop(u);
- if (r <= 0)
- return r;
-
- unit_status_log_starting_stopping_reloading(u, JOB_STOP);
- unit_status_print_starting_stopping(u, JOB_STOP);
- return r;
+ return UNIT_VTABLE(u)->stop(u);
}
/* Errors:
@@ -1548,7 +1542,6 @@ int unit_stop(Unit *u) {
int unit_reload(Unit *u) {
UnitActiveState state;
Unit *following;
- int r;
assert(u);
@@ -1575,12 +1568,7 @@ int unit_reload(Unit *u) {
unit_add_to_dbus_queue(u);
- r = UNIT_VTABLE(u)->reload(u);
- if (r <= 0)
- return r;
-
- unit_status_log_starting_stopping_reloading(u, JOB_RELOAD);
- return r;
+ return UNIT_VTABLE(u)->reload(u);
}
bool unit_can_reload(Unit *u) {
diff --git a/src/core/unit.h b/src/core/unit.h
index 85f52df18..480e2e95f 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -562,6 +562,7 @@ int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency d);
int unit_coldplug(Unit *u, Hashmap *deferred_work);
void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
+void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t);
bool unit_need_daemon_reload(Unit *u);