From 5892a914d173e4b968d2a14fbf717373dee3999a Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Mon, 17 Mar 2014 11:41:21 +0100 Subject: busname: introduce Activating directive Add a new config 'Activating' directive which denotes whether a busname is actually registered on the bus. It defaults to 'yes'. If set to 'no', the .busname unit only uploads policy, which will remain active as long as the unit is running. --- src/core/busname.c | 57 ++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 36 insertions(+), 21 deletions(-) (limited to 'src/core/busname.c') diff --git a/src/core/busname.c b/src/core/busname.c index ccef32e9e7..0cae20d2d1 100644 --- a/src/core/busname.c +++ b/src/core/busname.c @@ -29,6 +29,7 @@ static const UnitActiveState state_translation_table[_BUSNAME_STATE_MAX] = { [BUSNAME_DEAD] = UNIT_INACTIVE, + [BUSNAME_REGISTERED] = UNIT_ACTIVE, [BUSNAME_LISTENING] = UNIT_ACTIVE, [BUSNAME_RUNNING] = UNIT_ACTIVE, [BUSNAME_FAILED] = UNIT_FAILED @@ -96,20 +97,22 @@ static int busname_add_extras(BusName *n) { return r; } - if (!UNIT_DEREF(n->service)) { - Unit *x; + if (n->activating) { + if (!UNIT_DEREF(n->service)) { + Unit *x; - r = unit_load_related_unit(u, ".service", &x); + r = unit_load_related_unit(u, ".service", &x); + if (r < 0) + return r; + + unit_ref_set(&n->service, x); + } + + r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(n->service), true); if (r < 0) return r; - - unit_ref_set(&n->service, x); } - r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(n->service), true); - if (r < 0) - return r; - if (u->default_dependencies) { r = busname_add_default_default_dependencies(n); if (r < 0) @@ -172,10 +175,12 @@ static void busname_dump(Unit *u, FILE *f, const char *prefix) { "%sBus Name State: %s\n" "%sResult: %s\n" "%sName: %s\n" + "%sActivating: %s\n" "%sAccept FD: %s\n", prefix, busname_state_to_string(n->state), prefix, busname_result_to_string(n->result), prefix, n->name, + prefix, yes_no(n->activating), prefix, yes_no(n->accept_fd)); } @@ -231,7 +236,7 @@ static int busname_open_fd(BusName *n) { n->starter_fd = bus_kernel_create_starter( UNIT(n)->manager->running_as == SYSTEMD_SYSTEM ? "system" : "user", - n->name, n->accept_fd, n->policy); + n->name, n->activating, n->accept_fd, n->policy); if (n->starter_fd < 0) { log_warning_unit(UNIT(n)->id, "Failed to create starter fd: %s", strerror(-n->starter_fd)); @@ -251,7 +256,7 @@ static void busname_set_state(BusName *n, BusNameState state) { if (state != BUSNAME_LISTENING) busname_unwatch_fd(n); - if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_RUNNING)) + if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) busname_close_fd(n); if (state != old_state) @@ -271,7 +276,7 @@ static int busname_coldplug(Unit *u) { if (n->deserialized_state == n->state) return 0; - if (IN_SET(n->deserialized_state, BUSNAME_LISTENING, BUSNAME_RUNNING)) { + if (IN_SET(n->deserialized_state, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) { r = busname_open_fd(n); if (r < 0) return r; @@ -303,17 +308,23 @@ static void busname_enter_listening(BusName *n) { r = busname_open_fd(n); if (r < 0) { - log_warning_unit(UNIT(n)->id, "%s failed to listen on bus names: %s", UNIT(n)->id, strerror(-r)); + log_warning_unit(UNIT(n)->id, "%s failed to %s: %s", UNIT(n)->id, + n->activating ? "listen on bus name" : "register policy for name", + strerror(-r)); goto fail; } - r = busname_watch_fd(n); - if (r < 0) { - log_warning_unit(UNIT(n)->id, "%s failed to watch names: %s", UNIT(n)->id, strerror(-r)); - goto fail; - } + if (n->activating) { + r = busname_watch_fd(n); + if (r < 0) { + log_warning_unit(UNIT(n)->id, "%s failed to watch names: %s", UNIT(n)->id, strerror(-r)); + goto fail; + } + + busname_set_state(n, BUSNAME_LISTENING); + } else + busname_set_state(n, BUSNAME_REGISTERED); - busname_set_state(n, BUSNAME_LISTENING); return; fail: @@ -329,6 +340,9 @@ static void busname_enter_running(BusName *n) { assert(n); + if (!n->activating) + return; + /* We don't take conenctions anymore if we are supposed to * shut down anyway */ @@ -369,7 +383,7 @@ static int busname_start(Unit *u) { assert(n); - if (UNIT_ISSET(n->service)) { + if (n->activating && UNIT_ISSET(n->service)) { Service *service; service = SERVICE(UNIT_DEREF(n->service)); @@ -392,7 +406,7 @@ static int busname_stop(Unit *u) { BusName *n = BUSNAME(u); assert(n); - assert(n->state == BUSNAME_LISTENING || n->state == BUSNAME_RUNNING); + assert(IN_SET(n->state, BUSNAME_REGISTERED, BUSNAME_LISTENING, BUSNAME_RUNNING)); busname_enter_dead(n, BUSNAME_SUCCESS); return 0; @@ -536,6 +550,7 @@ static void busname_trigger_notify(Unit *u, Unit *other) { static const char* const busname_state_table[_BUSNAME_STATE_MAX] = { [BUSNAME_DEAD] = "dead", + [BUSNAME_REGISTERED] = "registered", [BUSNAME_LISTENING] = "listening", [BUSNAME_RUNNING] = "running", [BUSNAME_FAILED] = "failed" -- cgit v1.2.3-54-g00ecf