From: Michal Sekletar Date: Fri, 20 Jul 2012 13:55:01 +0000 (+0200) Subject: systemd: added new dependency PartOf X-Git-Tag: v188~85 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=85e9a1010d16064ce435b84f02dc585bc645aade;p=thirdparty%2Fsystemd.git systemd: added new dependency PartOf This should address TODO item "new dependency type to "group" services in a target". Semantic of new dependency is as follows. Once configured it creates dependency which will cause that all dependent units get stopped if unit they all depend on is stopped or restarted. Usual use case would be configuring PartOf=some.target in template unit file and WantedBy=some.target in [Install] section and enabling desired number of instances. In this case starting one instance won't pull in target but stopping or starting target(in case of WantedBy is properly configured) will cause stop/start of all instances. --- diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml index 286862006a9..bdd8f7d7014 100644 --- a/man/systemd.unit.xml +++ b/man/systemd.unit.xml @@ -441,6 +441,21 @@ systemd. + + PartOf= + + Configures dependency + on other unit. When systemd stops or + restarts unit listed here, stop or + restart is propagated to dependent + units. Note that this is one way + dependency and changes to dependent + units does not affect listed unit. If + something else is desired, please + use some other type of dependency. + + + Conflicts= diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4 index d6a4711a325..2b1cfa073ca 100644 --- a/src/core/load-fragment-gperf.gperf.m4 +++ b/src/core/load-fragment-gperf.gperf.m4 @@ -112,6 +112,7 @@ Unit.PropagatesReloadTo, config_parse_unit_deps, UNIT_PROPAG Unit.PropagateReloadTo, config_parse_unit_deps, UNIT_PROPAGATES_RELOAD_TO, 0 Unit.ReloadPropagatedFrom, config_parse_unit_deps, UNIT_RELOAD_PROPAGATED_FROM, 0 Unit.PropagateReloadFrom, config_parse_unit_deps, UNIT_RELOAD_PROPAGATED_FROM, 0 +Unit.PartOf, config_parse_unit_deps, UNIT_PART_OF, 0 Unit.RequiresMountsFor, config_parse_unit_requires_mounts_for, 0, offsetof(Unit, requires_mounts_for) Unit.StopWhenUnneeded, config_parse_bool, 0, offsetof(Unit, stop_when_unneeded) Unit.RefuseManualStart, config_parse_bool, 0, offsetof(Unit, refuse_manual_start) diff --git a/src/core/transaction.c b/src/core/transaction.c index a1cf7069342..1f8d803aeb7 100644 --- a/src/core/transaction.c +++ b/src/core/transaction.c @@ -994,6 +994,18 @@ int transaction_add_job_and_dependencies( dbus_error_free(e); } } + + SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONSISTS_OF], i) { + r = transaction_add_job_and_dependencies(tr, type, dep, ret, true, override, false, false, ignore_order, e); + if (r < 0) { + if (r != -EBADR) + goto fail; + + if (e) + dbus_error_free(e); + } + } + } if (type == JOB_RELOAD) { diff --git a/src/core/unit.c b/src/core/unit.c index 7b2f597589c..be75cd792d5 100644 --- a/src/core/unit.c +++ b/src/core/unit.c @@ -1610,7 +1610,8 @@ int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_referen [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, - [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO + [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, + [UNIT_PART_OF] = UNIT_CONSISTS_OF }; int r, q = 0, v = 0, w = 0; diff --git a/src/core/unit.h b/src/core/unit.h index 2102b7a5700..89bd61c2d8f 100644 --- a/src/core/unit.h +++ b/src/core/unit.h @@ -75,12 +75,14 @@ enum UnitDependency { UNIT_REQUISITE_OVERRIDABLE, UNIT_WANTS, UNIT_BINDS_TO, + UNIT_PART_OF, /* Inverse of the above */ UNIT_REQUIRED_BY, /* inverse of 'requires' and 'requisite' is 'required_by' */ UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'requires_overridable' and 'requisite_overridable' is 'soft_required_by' */ UNIT_WANTED_BY, /* inverse of 'wants' */ UNIT_BOUND_BY, /* inverse of 'binds_to' */ + UNIT_CONSISTS_OF, /* inverse of 'part_of' */ /* Negative dependencies */ UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicted_by' */