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authorLennart Poettering <lennart@poettering.net>2015-01-05 17:22:10 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-05 17:54:59 +0100
commit9c3349e23b14db27e7ba45f82cf647899c563ea9 (patch)
tree387cb16085148be5626917ae4a83afdc3bc61d3e /src/core
parentbbe05969ec5b8b89a20f052f63ebb3790c0c5574 (diff)
core: rework counting of running jobs
Let's unify the code that counts the running jobs a bit, in order to make sure we are less likely to miss one. This is related to this bug: https://bugs.freedesktop.org/show_bug.cgi?id=87349 However, it probably won't fix it fully, and I cannot reproduce the issue. The change also adds an explicit assert change when the counter is off.
Diffstat (limited to 'src/core')
-rw-r--r--src/core/job.c61
-rw-r--r--src/core/manager.c8
-rw-r--r--src/core/unit.c11
3 files changed, 52 insertions, 28 deletions
diff --git a/src/core/job.c b/src/core/job.c
index a3ba7cf703..2129773ede 100644
--- a/src/core/job.c
+++ b/src/core/job.c
@@ -96,11 +96,39 @@ void job_free(Job *j) {
free(j);
}
+static void job_set_state(Job *j, JobState state) {
+ assert(j);
+ assert(state >= 0);
+ assert(state < _JOB_STATE_MAX);
+
+ if (j->state == state)
+ return;
+
+ j->state = state;
+
+ if (!j->installed)
+ return;
+
+ if (j->state == JOB_RUNNING)
+ j->unit->manager->n_running_jobs++;
+ else {
+ assert(j->state == JOB_WAITING);
+ assert(j->unit->manager->n_running_jobs > 0);
+
+ j->unit->manager->n_running_jobs--;
+
+ if (j->unit->manager->n_running_jobs <= 0)
+ j->unit->manager->jobs_in_progress_event_source = sd_event_source_unref(j->unit->manager->jobs_in_progress_event_source);
+ }
+}
+
void job_uninstall(Job *j) {
Job **pj;
assert(j->installed);
+ job_set_state(j, JOB_WAITING);
+
pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
assert(*pj == j);
@@ -155,6 +183,7 @@ Job* job_install(Job *j) {
assert(!j->installed);
assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION);
+ assert(j->state == JOB_WAITING);
pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
uj = *pj;
@@ -181,8 +210,8 @@ Job* job_install(Job *j) {
log_unit_debug(uj->unit->id,
"Merged into running job, re-running: %s/%s as %u",
uj->unit->id, job_type_to_string(uj->type), (unsigned) uj->id);
- uj->state = JOB_WAITING;
- uj->manager->n_running_jobs--;
+
+ job_set_state(uj, JOB_WAITING);
return uj;
}
}
@@ -191,6 +220,7 @@ Job* job_install(Job *j) {
/* Install the job */
*pj = j;
j->installed = true;
+
j->manager->n_installed_jobs ++;
log_unit_debug(j->unit->id,
"Installed new job %s/%s as %u",
@@ -209,15 +239,17 @@ int job_install_deserialized(Job *j) {
}
pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
-
if (*pj) {
- log_unit_debug(j->unit->id,
- "Unit %s already has a job installed. Not installing deserialized job.",
- j->unit->id);
+ log_unit_debug(j->unit->id, "Unit %s already has a job installed. Not installing deserialized job.", j->unit->id);
return -EEXIST;
}
+
*pj = j;
j->installed = true;
+
+ if (j->state == JOB_RUNNING)
+ j->unit->manager->n_running_jobs++;
+
log_unit_debug(j->unit->id,
"Reinstalled deserialized job %s/%s as %u",
j->unit->id, job_type_to_string(j->type), (unsigned) j->id);
@@ -484,8 +516,7 @@ int job_run_and_invalidate(Job *j) {
if (!job_is_runnable(j))
return -EAGAIN;
- j->state = JOB_RUNNING;
- m->n_running_jobs++;
+ job_set_state(j, JOB_RUNNING);
job_add_to_dbus_queue(j);
/* While we execute this operation the job might go away (for
@@ -549,10 +580,9 @@ int job_run_and_invalidate(Job *j) {
r = job_finish_and_invalidate(j, JOB_ASSERT, true);
else if (r == -ENOTSUP)
r = job_finish_and_invalidate(j, JOB_UNSUPPORTED, true);
- else if (r == -EAGAIN) {
- j->state = JOB_WAITING;
- m->n_running_jobs--;
- } else if (r < 0)
+ else if (r == -EAGAIN)
+ job_set_state(j, JOB_WAITING);
+ else if (r < 0)
r = job_finish_and_invalidate(j, JOB_FAILED, true);
}
@@ -780,9 +810,6 @@ int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) {
j->result = result;
- if (j->state == JOB_RUNNING)
- j->manager->n_running_jobs--;
-
log_unit_debug(u->id, "Job %s/%s finished, result=%s",
u->id, job_type_to_string(t), job_result_to_string(result));
@@ -795,7 +822,7 @@ int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) {
if (result == JOB_DONE && t == JOB_RESTART) {
job_change_type(j, JOB_START);
- j->state = JOB_WAITING;
+ job_set_state(j, JOB_WAITING);
job_add_to_run_queue(j);
@@ -1027,7 +1054,7 @@ int job_deserialize(Job *j, FILE *f, FDSet *fds) {
if (s < 0)
log_debug("Failed to parse job state %s", v);
else
- j->state = s;
+ job_set_state(j, s);
} else if (streq(l, "job-override")) {
int b;
diff --git a/src/core/manager.c b/src/core/manager.c
index 9705e64da9..519b374382 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -162,6 +162,7 @@ static void manager_print_jobs_in_progress(Manager *m) {
uint64_t x;
assert(m);
+ assert(m->n_running_jobs > 0);
manager_flip_auto_status(m, true);
@@ -184,8 +185,7 @@ static void manager_print_jobs_in_progress(Manager *m) {
m->jobs_in_progress_iteration++;
if (m->n_running_jobs > 1)
- if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
- job_of_n = NULL;
+ asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs);
format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
if (job_get_timeout(j, &x) > 0)
@@ -197,7 +197,6 @@ static void manager_print_jobs_in_progress(Manager *m) {
job_type_to_string(j->type),
unit_description(j->unit),
time, limit);
-
}
static int have_ask_password(void) {
@@ -2635,9 +2634,6 @@ void manager_check_finished(Manager *m) {
assert(m);
- if (m->n_running_jobs == 0)
- m->jobs_in_progress_event_source = sd_event_source_unref(m->jobs_in_progress_event_source);
-
if (hashmap_size(m->jobs) > 0) {
if (m->jobs_in_progress_event_source)
diff --git a/src/core/unit.c b/src/core/unit.c
index 9f7ba9227b..229bd0f73a 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -2674,7 +2674,9 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
if (streq(l, "job")) {
if (v[0] == '\0') {
/* new-style serialized job */
- Job *j = job_new_raw(u);
+ Job *j;
+
+ j = job_new_raw(u);
if (!j)
return -ENOMEM;
@@ -2696,12 +2698,11 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
job_free(j);
return r;
}
-
- if (j->state == JOB_RUNNING)
- u->manager->n_running_jobs++;
} else {
/* legacy */
- JobType type = job_type_from_string(v);
+ JobType type;
+
+ type = job_type_from_string(v);
if (type < 0)
log_debug("Failed to parse job type value %s", v);
else