return false;
}
-static bool types_match(JobType a, JobType b, JobType c, JobType d) {
- return
- (a == c && b == d) ||
- (a == d && b == c);
-}
-
-int job_type_merge(JobType *a, JobType b) {
- if (*a == b)
- return 0;
-
- /* Merging is associative! a merged with b merged with c is
- * the same as a merged with c merged with b. */
-
- /* Mergeability is transitive! if a can be merged with b and b
- * with c then a also with c */
-
- /* Also, if a merged with b cannot be merged with c, then
- * either a or b cannot be merged with c either */
-
- if (types_match(*a, b, JOB_START, JOB_VERIFY_ACTIVE))
- *a = JOB_START;
- else if (types_match(*a, b, JOB_START, JOB_RELOAD) ||
- types_match(*a, b, JOB_START, JOB_RELOAD_OR_START) ||
- types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RELOAD_OR_START) ||
- types_match(*a, b, JOB_RELOAD, JOB_RELOAD_OR_START))
- *a = JOB_RELOAD_OR_START;
- else if (types_match(*a, b, JOB_START, JOB_RESTART) ||
- types_match(*a, b, JOB_START, JOB_TRY_RESTART) ||
- types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RESTART) ||
- types_match(*a, b, JOB_RELOAD, JOB_RESTART) ||
- types_match(*a, b, JOB_RELOAD_OR_START, JOB_RESTART) ||
- types_match(*a, b, JOB_RELOAD_OR_START, JOB_TRY_RESTART) ||
- types_match(*a, b, JOB_RESTART, JOB_TRY_RESTART))
- *a = JOB_RESTART;
- else if (types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RELOAD))
- *a = JOB_RELOAD;
- else if (types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_TRY_RESTART) ||
- types_match(*a, b, JOB_RELOAD, JOB_TRY_RESTART))
- *a = JOB_TRY_RESTART;
- else
- return -EEXIST;
-
- return 0;
-}
-
-bool job_type_is_mergeable(JobType a, JobType b) {
- return job_type_merge(&a, b) >= 0;
-}
-
-bool job_type_is_superset(JobType a, JobType b) {
+/*
+ * Merging is commutative, so imagine the matrix as symmetric. We store only
+ * its lower triangle to avoid duplication. We don't store the main diagonal,
+ * because A merged with A is simply A.
+ *
+ * Merging is associative! A merged with B merged with C is the same as
+ * A merged with C merged with B.
+ *
+ * Mergeability is transitive! If A can be merged with B and B with C then
+ * A also with C.
+ *
+ * Also, if A merged with B cannot be merged with C, then either A or B cannot
+ * 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 */
+/************************************************************************************************************************************/
+/*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,
+};
- /* Checks whether operation a is a "superset" of b in its
- * actions */
+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);
if (a == b)
- return true;
-
- switch (a) {
- case JOB_START:
- return b == JOB_VERIFY_ACTIVE;
-
- case JOB_RELOAD:
- return
- b == JOB_VERIFY_ACTIVE;
-
- case JOB_RELOAD_OR_START:
- return
- b == JOB_RELOAD ||
- b == JOB_START ||
- b == JOB_VERIFY_ACTIVE;
-
- case JOB_RESTART:
- return
- b == JOB_START ||
- b == JOB_VERIFY_ACTIVE ||
- b == JOB_RELOAD ||
- b == JOB_RELOAD_OR_START ||
- b == JOB_TRY_RESTART;
-
- case JOB_TRY_RESTART:
- return
- b == JOB_VERIFY_ACTIVE ||
- b == JOB_RELOAD;
- default:
- return false;
+ return a;
+ if (a < b) {
+ JobType tmp = a;
+ a = b;
+ b = tmp;
}
-}
-
-bool job_type_is_conflicting(JobType a, JobType b) {
- assert(a >= 0 && a < _JOB_TYPE_MAX);
- assert(b >= 0 && b < _JOB_TYPE_MAX);
- return (a == JOB_STOP) != (b == JOB_STOP);
+ return job_merging_table[(a - 1) * a / 2 + b];
}
bool job_type_is_redundant(JobType a, UnitActiveState b) {
return true;
}
+static void job_change_type(Job *j, JobType newtype) {
+ log_debug("Converting job %s/%s -> %s/%s",
+ j->unit->id, job_type_to_string(j->type),
+ j->unit->id, job_type_to_string(newtype));
+
+ j->type = newtype;
+}
+
int job_run_and_invalidate(Job *j) {
int r;
uint32_t id;
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);
- /* If this unit cannot be started, then simply
- * wait */
+ /* If this unit cannot be started, then simply wait */
if (r == -EBADR)
r = 0;
-
break;
case JOB_VERIFY_ACTIVE: {
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);
- /* If this unit cannot stopped, then simply
- * wait. */
+ /* If this unit cannot stopped, then simply wait. */
if (r == -EBADR)
r = 0;
break;
r = unit_reload(j->unit);
break;
- case JOB_RELOAD_OR_START:
- if (unit_active_state(j->unit) == UNIT_ACTIVE) {
- j->type = JOB_RELOAD;
- r = unit_reload(j->unit);
- } else {
- j->type = JOB_START;
- r = unit_start(j->unit);
-
- if (r == -EBADR)
- r = 0;
- }
- break;
-
- case JOB_RESTART: {
- UnitActiveState t = unit_active_state(j->unit);
- if (t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_ACTIVATING) {
- j->type = JOB_START;
- r = unit_start(j->unit);
- } else
- r = unit_stop(j->unit);
- break;
- }
-
- case JOB_TRY_RESTART: {
- UnitActiveState t = unit_active_state(j->unit);
- if (t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_DEACTIVATING)
- r = -ENOEXEC;
- else if (t == UNIT_ACTIVATING) {
- j->type = JOB_START;
- r = unit_start(j->unit);
- } else {
- j->type = JOB_RESTART;
- r = unit_stop(j->unit);
- }
- break;
- }
-
default:
assert_not_reached("Unknown job type");
}
job_add_to_dbus_queue(j);
/* Patch restart jobs so that they become normal start jobs */
- if (result == JOB_DONE && (j->type == JOB_RESTART || j->type == JOB_TRY_RESTART)) {
-
- log_debug("Converting job %s/%s -> %s/%s",
- j->unit->id, job_type_to_string(j->type),
- j->unit->id, job_type_to_string(JOB_START));
+ if (result == JOB_DONE && j->type == JOB_RESTART) {
+ job_change_type(j, JOB_START);
j->state = JOB_WAITING;
- j->type = JOB_START;
job_add_to_run_queue(j);
~ianmdlvl / elogind.git / blobdiff