summaryrefslogtreecommitdiff
path: root/src/core/job.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/core/job.c')
-rw-r--r--src/core/job.c163
1 files changed, 102 insertions, 61 deletions
diff --git a/src/core/job.c b/src/core/job.c
index bd25a63d89..301d83a9dc 100644
--- a/src/core/job.c
+++ b/src/core/job.c
@@ -60,6 +60,7 @@ Job* job_new_raw(Unit *unit) {
j->manager = unit->manager;
j->unit = unit;
+ j->type = _JOB_TYPE_INVALID;
j->timer_watch.type = WATCH_INVALID;
return j;
@@ -115,15 +116,21 @@ void job_free(Job *j) {
}
void job_uninstall(Job *j) {
+ Job **pj;
+
assert(j->installed);
- assert(j->unit->job == j);
+
+ pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
+ assert(*pj == j);
+
/* Detach from next 'bigger' objects */
/* daemon-reload should be transparent to job observers */
if (j->manager->n_reloading <= 0)
bus_job_send_removed_signal(j);
- j->unit->job = NULL;
+ *pj = NULL;
+
unit_add_to_gc_queue(j->unit);
hashmap_remove(j->manager->jobs, UINT32_TO_PTR(j->id));
@@ -144,31 +151,38 @@ static bool job_type_allows_late_merge(JobType t) {
* patched into JOB_START after stopping the unit. So if we see a
* JOB_RESTART running, it means the unit hasn't stopped yet and at
* this time the merge is still allowed. */
- return !(t == JOB_RELOAD || t == JOB_RELOAD_OR_START);
+ return t != JOB_RELOAD;
}
static void job_merge_into_installed(Job *j, Job *other) {
assert(j->installed);
assert(j->unit == other->unit);
- j->type = job_type_lookup_merge(j->type, other->type);
- assert(j->type >= 0);
+ if (j->type != JOB_NOP)
+ job_type_merge_and_collapse(&j->type, other->type, j->unit);
+ else
+ assert(other->type == JOB_NOP);
j->override = j->override || other->override;
}
Job* job_install(Job *j) {
- Job *uj = j->unit->job;
+ Job **pj;
+ Job *uj;
assert(!j->installed);
+ assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION);
+
+ pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
+ uj = *pj;
if (uj) {
- if (job_type_is_conflicting(uj->type, j->type))
+ if (j->type != JOB_NOP && job_type_is_conflicting(uj->type, j->type))
job_finish_and_invalidate(uj, JOB_CANCELED, true);
else {
/* not conflicting, i.e. mergeable */
- if (uj->state == JOB_WAITING ||
+ if (j->type == JOB_NOP || uj->state == JOB_WAITING ||
(job_type_allows_late_merge(j->type) && job_type_is_superset(uj->type, j->type))) {
job_merge_into_installed(uj, j);
log_debug("Merged into installed job %s/%s as %u",
@@ -189,23 +203,33 @@ Job* job_install(Job *j) {
}
/* Install the job */
- j->unit->job = j;
+ *pj = j;
j->installed = true;
j->manager->n_installed_jobs ++;
log_debug("Installed new job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id);
return j;
}
-void job_install_deserialized(Job *j) {
+int job_install_deserialized(Job *j) {
+ Job **pj;
+
assert(!j->installed);
- if (j->unit->job) {
+ if (j->type < 0 || j->type >= _JOB_TYPE_MAX_IN_TRANSACTION) {
+ log_debug("Invalid job type %s in deserialization.", strna(job_type_to_string(j->type)));
+ return -EINVAL;
+ }
+
+ pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job;
+
+ if (*pj) {
log_debug("Unit %s already has a job installed. Not installing deserialized job.", j->unit->id);
- return;
+ return -EEXIST;
}
- j->unit->job = j;
+ *pj = j;
j->installed = true;
log_debug("Reinstalled deserialized job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id);
+ return 0;
}
JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts) {
@@ -268,6 +292,10 @@ void job_dump(Job *j, FILE*f, const char *prefix) {
* its lower triangle to avoid duplication. We don't store the main diagonal,
* because A merged with A is simply A.
*
+ * If the resulting type is collapsed immediately afterwards (to get rid of
+ * the JOB_RELOAD_OR_START, which lies outside the lookup function's domain),
+ * the following properties hold:
+ *
* Merging is associative! A merged with B merged with C is the same as
* A merged with C merged with B.
*
@@ -278,21 +306,19 @@ void job_dump(Job *j, FILE*f, const char *prefix) {
* be merged with C either.
*/
static const JobType job_merging_table[] = {
-/* What \ With * JOB_START JOB_VERIFY_ACTIVE JOB_STOP JOB_RELOAD JOB_RELOAD_OR_START JOB_RESTART JOB_TRY_RESTART */
-/************************************************************************************************************************************/
+/* What \ With * JOB_START JOB_VERIFY_ACTIVE JOB_STOP JOB_RELOAD */
+/*********************************************************************************/
/*JOB_START */
/*JOB_VERIFY_ACTIVE */ JOB_START,
/*JOB_STOP */ -1, -1,
/*JOB_RELOAD */ JOB_RELOAD_OR_START, JOB_RELOAD, -1,
-/*JOB_RELOAD_OR_START*/ JOB_RELOAD_OR_START, JOB_RELOAD_OR_START, -1, JOB_RELOAD_OR_START,
-/*JOB_RESTART */ JOB_RESTART, JOB_RESTART, -1, JOB_RESTART, JOB_RESTART,
-/*JOB_TRY_RESTART */ JOB_RESTART, JOB_TRY_RESTART, -1, JOB_TRY_RESTART, JOB_RESTART, JOB_RESTART,
+/*JOB_RESTART */ JOB_RESTART, JOB_RESTART, -1, JOB_RESTART,
};
JobType job_type_lookup_merge(JobType a, JobType b) {
- assert_cc(ELEMENTSOF(job_merging_table) == _JOB_TYPE_MAX * (_JOB_TYPE_MAX - 1) / 2);
- assert(a >= 0 && a < _JOB_TYPE_MAX);
- assert(b >= 0 && b < _JOB_TYPE_MAX);
+ assert_cc(ELEMENTSOF(job_merging_table) == _JOB_TYPE_MAX_MERGING * (_JOB_TYPE_MAX_MERGING - 1) / 2);
+ assert(a >= 0 && a < _JOB_TYPE_MAX_MERGING);
+ assert(b >= 0 && b < _JOB_TYPE_MAX_MERGING);
if (a == b)
return a;
@@ -328,24 +354,50 @@ bool job_type_is_redundant(JobType a, UnitActiveState b) {
return
b == UNIT_RELOADING;
- case JOB_RELOAD_OR_START:
- return
- b == UNIT_ACTIVATING ||
- b == UNIT_RELOADING;
-
case JOB_RESTART:
return
b == UNIT_ACTIVATING;
+ default:
+ assert_not_reached("Invalid job type");
+ }
+}
+
+void job_type_collapse(JobType *t, Unit *u) {
+ UnitActiveState s;
+
+ switch (*t) {
+
case JOB_TRY_RESTART:
- return
- b == UNIT_ACTIVATING;
+ s = unit_active_state(u);
+ if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s))
+ *t = JOB_NOP;
+ else
+ *t = JOB_RESTART;
+ break;
+
+ case JOB_RELOAD_OR_START:
+ s = unit_active_state(u);
+ if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s))
+ *t = JOB_START;
+ else
+ *t = JOB_RELOAD;
+ break;
default:
- assert_not_reached("Invalid job type");
+ ;
}
}
+int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u) {
+ JobType t = job_type_lookup_merge(*a, b);
+ if (t < 0)
+ return -EEXIST;
+ *a = t;
+ job_type_collapse(a, u);
+ return 0;
+}
+
bool job_is_runnable(Job *j) {
Iterator i;
Unit *other;
@@ -362,10 +414,12 @@ bool job_is_runnable(Job *j) {
if (j->ignore_order)
return true;
+ if (j->type == JOB_NOP)
+ return true;
+
if (j->type == JOB_START ||
j->type == JOB_VERIFY_ACTIVE ||
- j->type == JOB_RELOAD ||
- j->type == JOB_RELOAD_OR_START) {
+ j->type == JOB_RELOAD) {
/* Immediate result is that the job is or might be
* started. In this case lets wait for the
@@ -383,8 +437,7 @@ bool job_is_runnable(Job *j) {
SET_FOREACH(other, j->unit->dependencies[UNIT_BEFORE], i)
if (other->job &&
(other->job->type == JOB_STOP ||
- other->job->type == JOB_RESTART ||
- other->job->type == JOB_TRY_RESTART))
+ other->job->type == JOB_RESTART))
return false;
/* This means that for a service a and a service b where b
@@ -416,6 +469,7 @@ int job_run_and_invalidate(Job *j) {
assert(j);
assert(j->installed);
+ assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION);
if (j->in_run_queue) {
LIST_REMOVE(Job, run_queue, j->manager->run_queue, j);
@@ -441,15 +495,6 @@ int job_run_and_invalidate(Job *j) {
switch (j->type) {
- case JOB_RELOAD_OR_START:
- if (unit_active_state(j->unit) == UNIT_ACTIVE) {
- job_change_type(j, JOB_RELOAD);
- r = unit_reload(j->unit);
- break;
- }
- job_change_type(j, JOB_START);
- /* fall through */
-
case JOB_START:
r = unit_start(j->unit);
@@ -469,14 +514,6 @@ int job_run_and_invalidate(Job *j) {
break;
}
- case JOB_TRY_RESTART:
- if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(j->unit))) {
- r = -ENOEXEC;
- break;
- }
- job_change_type(j, JOB_RESTART);
- /* fall through */
-
case JOB_STOP:
case JOB_RESTART:
r = unit_stop(j->unit);
@@ -490,11 +527,16 @@ int job_run_and_invalidate(Job *j) {
r = unit_reload(j->unit);
break;
+ case JOB_NOP:
+ r = -EALREADY;
+ break;
+
default:
assert_not_reached("Unknown job type");
}
- if ((j = manager_get_job(m, id))) {
+ j = manager_get_job(m, id);
+ if (j) {
if (r == -EALREADY)
r = job_finish_and_invalidate(j, JOB_DONE, true);
else if (r == -ENOEXEC)
@@ -564,6 +606,7 @@ int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) {
assert(j);
assert(j->installed);
+ assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION);
job_add_to_dbus_queue(j);
@@ -597,29 +640,25 @@ int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) {
if (result != JOB_DONE && recursive) {
if (t == JOB_START ||
- t == JOB_VERIFY_ACTIVE ||
- t == JOB_RELOAD_OR_START) {
+ t == JOB_VERIFY_ACTIVE) {
SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i)
if (other->job &&
(other->job->type == JOB_START ||
- other->job->type == JOB_VERIFY_ACTIVE ||
- other->job->type == JOB_RELOAD_OR_START))
+ other->job->type == JOB_VERIFY_ACTIVE))
job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true);
SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
if (other->job &&
(other->job->type == JOB_START ||
- other->job->type == JOB_VERIFY_ACTIVE ||
- other->job->type == JOB_RELOAD_OR_START))
+ other->job->type == JOB_VERIFY_ACTIVE))
job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true);
SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
if (other->job &&
!other->job->override &&
(other->job->type == JOB_START ||
- other->job->type == JOB_VERIFY_ACTIVE ||
- other->job->type == JOB_RELOAD_OR_START))
+ other->job->type == JOB_VERIFY_ACTIVE))
job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true);
} else if (t == JOB_STOP) {
@@ -627,8 +666,7 @@ int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) {
SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i)
if (other->job &&
(other->job->type == JOB_START ||
- other->job->type == JOB_VERIFY_ACTIVE ||
- other->job->type == JOB_RELOAD_OR_START))
+ other->job->type == JOB_VERIFY_ACTIVE))
job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true);
}
}
@@ -808,6 +846,8 @@ int job_deserialize(Job *j, FILE *f, FDSet *fds) {
JobType t = job_type_from_string(v);
if (t < 0)
log_debug("Failed to parse job type %s", v);
+ else if (t >= _JOB_TYPE_MAX_IN_TRANSACTION)
+ log_debug("Cannot deserialize job of type %s", v);
else
j->type = t;
} else if (streq(l, "job-state")) {
@@ -887,6 +927,7 @@ static const char* const job_type_table[_JOB_TYPE_MAX] = {
[JOB_RELOAD_OR_START] = "reload-or-start",
[JOB_RESTART] = "restart",
[JOB_TRY_RESTART] = "try-restart",
+ [JOB_NOP] = "nop",
};
DEFINE_STRING_TABLE_LOOKUP(job_type, JobType);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-23 17:20:29 +0000