int scope_abandon(Scope *s) {
assert(s);
if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED))
return -ESTALE;
free(s->controller);
s->controller = NULL;
/* The client is no longer watching the remaining processes,
* so let's step in here, under the assumption that the
* remaining processes will be sooner or later reassigned to
* us as parent. */
unit_tidy_watch_pids(UNIT(s), 0, 0);
unit_watch_all_pids(UNIT(s));
/* If the PID set is empty now, then let's finish this off */
if (set_isempty(UNIT(s)->pids))
scope_notify_cgroup_empty_event(UNIT(s));
else
scope_set_state(s, SCOPE_ABANDONED);
return 0;
}
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 void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) {
/* If we get a SIGCHLD event for one of the processes we were
interested in, then we look for others to watch, under the
assumption that we'll sooner or later get a SIGCHLD for
them, as the original process we watched was probably the
parent of them, and they are hence now our children. */
unit_tidy_watch_pids(u, 0, 0);
unit_watch_all_pids(u);
/* If the PID set is empty now, then let's finish this off */
if (set_isempty(u->pids))
scope_notify_cgroup_empty_event(u);
}
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 int scope_coldplug(Unit *u) {
Scope *s = SCOPE(u);
int r;
assert(s);
assert(s->state == SCOPE_DEAD);
if (s->deserialized_state == s->state)
return 0;
if (IN_SET(s->deserialized_state, SCOPE_STOP_SIGKILL, SCOPE_STOP_SIGTERM)) {
r = scope_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_stop_usec));
if (r < 0)
return r;
}
if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED))
unit_watch_all_pids(UNIT(s));
scope_set_state(s, s->deserialized_state);
return 0;
}
static int scope_coldplug(Unit *u) {
Scope *s = SCOPE(u);
int r;
assert(s);
assert(s->state == SCOPE_DEAD);
if (s->deserialized_state != s->state) {
if (IN_SET(s->deserialized_state, SCOPE_STOP_SIGKILL, SCOPE_STOP_SIGTERM)) {
r = scope_arm_timer(s);
if (r < 0)
return r;
}
if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED))
unit_watch_all_pids(UNIT(s));
scope_set_state(s, s->deserialized_state);
}
return 0;
}
