static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
Scope *s = SCOPE(userdata);
assert(s);
assert(s->timer_event_source == source);
switch (s->state) {
case SCOPE_STOP_SIGTERM:
if (s->kill_context.send_sigkill) {
log_warning_unit(UNIT(s)->id, "%s stopping timed out. Killing.", UNIT(s)->id);
scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT);
} else {
log_warning_unit(UNIT(s)->id, "%s stopping timed out. Skipping SIGKILL.", UNIT(s)->id);
scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT);
}
break;
case SCOPE_STOP_SIGKILL:
log_warning_unit(UNIT(s)->id, "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT);
break;
default:
assert_not_reached("Timeout at wrong time.");
}
return 0;
}
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
int r;
assert(s);
if (f != SCOPE_SUCCESS)
s->result = f;
r = unit_kill_context(
UNIT(s),
&s->kill_context,
state != SCOPE_STOP_SIGTERM,
-1, -1, false);
if (r < 0)
goto fail;
if (r > 0) {
r = scope_arm_timer(s);
if (r < 0)
goto fail;
scope_set_state(s, state);
} else
scope_enter_dead(s, SCOPE_SUCCESS);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
bool skip_signal = false;
int r;
assert(s);
if (s->result == SCOPE_SUCCESS)
s->result = f;
/* Before sending any signal, make sure we track all members of this cgroup */
(void) unit_watch_all_pids(UNIT(s));
/* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
* died now */
(void) unit_enqueue_rewatch_pids(UNIT(s));
/* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going
* directly into SIGTERM berserk mode */
if (state == SCOPE_STOP_SIGTERM)
skip_signal = bus_scope_send_request_stop(s) > 0;
if (skip_signal)
r = 1; /* wait */
else {
r = unit_kill_context(
UNIT(s),
&s->kill_context,
state != SCOPE_STOP_SIGTERM ? KILL_KILL :
s->was_abandoned ? KILL_TERMINATE_AND_LOG :
KILL_TERMINATE,
-1, -1, false);
if (r < 0)
goto fail;
}
if (r > 0) {
r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
if (r < 0)
goto fail;
scope_set_state(s, state);
} else if (state == SCOPE_STOP_SIGTERM)
scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
else
scope_enter_dead(s, SCOPE_SUCCESS);
return;
fail:
log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
bool skip_signal = false;
int r;
assert(s);
if (s->result == SCOPE_SUCCESS)
s->result = f;
unit_watch_all_pids(UNIT(s));
/* If we have a controller set let's ask the controller nicely
* to terminate the scope, instead of us going directly into
* SIGTERM berserk mode */
if (state == SCOPE_STOP_SIGTERM)
skip_signal = bus_scope_send_request_stop(s) > 0;
if (skip_signal)
r = 1; /* wait */
else {
r = unit_kill_context(
UNIT(s),
&s->kill_context,
state != SCOPE_STOP_SIGTERM ? KILL_KILL :
s->was_abandoned ? KILL_TERMINATE_AND_LOG :
KILL_TERMINATE,
-1, -1, false);
if (r < 0)
goto fail;
}
if (r > 0) {
r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
if (r < 0)
goto fail;
scope_set_state(s, state);
} else if (state == SCOPE_STOP_SIGTERM)
scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
else
scope_enter_dead(s, SCOPE_SUCCESS);
return;
fail:
log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
static int scope_start(Unit *u) {
Scope *s = SCOPE(u);
int r;
assert(s);
if (s->state == SCOPE_FAILED)
return -EPERM;
/* We can't fulfill this right now, please try again later */
if (s->state == SCOPE_STOP_SIGTERM ||
s->state == SCOPE_STOP_SIGKILL)
return -EAGAIN;
assert(s->state == SCOPE_DEAD);
if (!u->transient && UNIT(s)->manager->n_reloading <= 0)
return -ENOENT;
(void) unit_realize_cgroup(u);
(void) unit_reset_cpu_usage(u);
r = unit_attach_pids_to_cgroup(u);
if (r < 0) {
log_unit_warning_errno(UNIT(s), r, "Failed to add PIDs to scope's control group: %m");
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
return r;
}
s->result = SCOPE_SUCCESS;
scope_set_state(s, SCOPE_RUNNING);
return 1;
}
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
bool skip_signal = false;
int r;
assert(s);
if (f != SCOPE_SUCCESS)
s->result = f;
unit_watch_all_pids(UNIT(s));
/* If we have a controller set let's ask the controller nicely
* to terminate the scope, instead of us going directly into
* SIGTERM beserk mode */
if (state == SCOPE_STOP_SIGTERM)
skip_signal = bus_scope_send_request_stop(s) > 0;
if (!skip_signal) {
r = unit_kill_context(
UNIT(s),
&s->kill_context,
state != SCOPE_STOP_SIGTERM,
-1, -1, false);
if (r < 0)
goto fail;
} else
r = 1;
if (r > 0) {
r = scope_arm_timer(s);
if (r < 0)
goto fail;
scope_set_state(s, state);
} else if (state == SCOPE_STOP_SIGTERM)
scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
else
scope_enter_dead(s, SCOPE_SUCCESS);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
static void scope_notify_cgroup_empty_event(Unit *u) {
Scope *s = SCOPE(u);
assert(u);
log_unit_debug(u, "cgroup is empty");
if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
scope_enter_dead(s, SCOPE_SUCCESS);
}
static int scope_start(Unit *u) {
Scope *s = SCOPE(u);
int r;
assert(s);
if (unit_has_name(u, SPECIAL_INIT_SCOPE))
return -EPERM;
if (s->state == SCOPE_FAILED)
return -EPERM;
/* We can't fulfill this right now, please try again later */
if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
return -EAGAIN;
assert(s->state == SCOPE_DEAD);
if (!u->transient && !MANAGER_IS_RELOADING(u->manager))
return -ENOENT;
(void) bus_scope_track_controller(s);
r = unit_acquire_invocation_id(u);
if (r < 0)
return r;
(void) unit_realize_cgroup(u);
(void) unit_reset_cpu_accounting(u);
(void) unit_reset_ip_accounting(u);
unit_export_state_files(UNIT(s));
r = unit_attach_pids_to_cgroup(u, UNIT(s)->pids, NULL);
if (r < 0) {
log_unit_warning_errno(UNIT(s), r, "Failed to add PIDs to scope's control group: %m");
scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
return r;
}
s->result = SCOPE_SUCCESS;
scope_set_state(s, SCOPE_RUNNING);
/* Start watching the PIDs currently in the scope */
(void) unit_enqueue_rewatch_pids(UNIT(s));
return 1;
}
static void scope_notify_cgroup_empty_event(Unit *u) {
Scope *s = SCOPE(u);
assert(u);
log_debug_unit(u->id, "%s: cgroup is empty", u->id);
switch (s->state) {
case SCOPE_RUNNING:
case SCOPE_STOP_SIGTERM:
case SCOPE_STOP_SIGKILL:
scope_enter_dead(s, SCOPE_SUCCESS);
break;
default:
;
}
}