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systemd: Support OOMPolicy in scope units

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Closes #25376.
This commit is contained in:
Mark Laws 2022-11-14 21:48:09 +09:00
parent 09cd639a59
commit 5fa098357e
5 changed files with 33 additions and 3 deletions
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6
man/org.freedesktop.systemd1.xml
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@ -10139,6 +10139,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
readonly t RuntimeMaxUSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("const")
readonly t RuntimeRandomizedExtraUSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("const")
readonly s OOMPolicy = '...';
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly s Slice = '...';
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
@ -10313,6 +10315,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
<!--property RuntimeRandomizedExtraUSec is not documented!-->
<!--property OOMPolicy is not documented!-->
<!--property Slice is not documented!-->
<!--property ControlGroupId is not documented!-->
@ -10495,6 +10499,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
<variablelist class="dbus-property" generated="True" extra-ref="RuntimeRandomizedExtraUSec"/>
<variablelist class="dbus-property" generated="True" extra-ref="OOMPolicy"/>
<variablelist class="dbus-property" generated="True" extra-ref="Slice"/>
<variablelist class="dbus-property" generated="True" extra-ref="ControlGroup"/>

6
src/core/dbus-scope.c
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@ -5,6 +5,7 @@
#include "bus-get-properties.h"
#include "dbus-cgroup.h"
#include "dbus-kill.h"
#include "dbus-manager.h"
#include "dbus-scope.h"
#include "dbus-unit.h"
#include "dbus-util.h"
@ -39,6 +40,7 @@ int bus_scope_method_abandon(sd_bus_message *message, void *userdata, sd_bus_err
}
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult);
static BUS_DEFINE_SET_TRANSIENT_PARSE(oom_policy, OOMPolicy, oom_policy_from_string);
const sd_bus_vtable bus_scope_vtable[] = {
SD_BUS_VTABLE_START(0),
@ -47,6 +49,7 @@ const sd_bus_vtable bus_scope_vtable[] = {
SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("RuntimeMaxUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("RuntimeRandomizedExtraUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_rand_extra_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("OOMPolicy", "s", bus_property_get_oom_policy, offsetof(Scope, oom_policy), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_SIGNAL("RequestStop", NULL, 0),
SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_method_abandon, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END
@ -77,6 +80,9 @@ static int bus_scope_set_transient_property(
if (streq(name, "RuntimeRandomizedExtraUSec"))
return bus_set_transient_usec(u, name, &s->runtime_rand_extra_usec, message, flags, error);
if (streq(name, "OOMPolicy"))
return bus_set_transient_oom_policy(u, name, &s->oom_policy, message, flags, error);
if (streq(name, "PIDs")) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
unsigned n = 0;

19
src/core/scope.c
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@ -43,6 +43,7 @@ static void scope_init(Unit *u) {
s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
u->ignore_on_isolate = true;
s->user = s->group = NULL;
s->oom_policy = _OOM_POLICY_INVALID;
}
static void scope_done(Unit *u) {
@ -194,6 +195,11 @@ static int scope_add_extras(Scope *s) {
if (r < 0)
return r;
if (s->oom_policy < 0)
s->oom_policy = s->cgroup_context.delegate ? OOM_CONTINUE : UNIT(s)->manager->default_oom_policy;
s->cgroup_context.memory_oom_group = s->oom_policy == OOM_KILL;
return scope_add_default_dependencies(s);
}
@ -286,11 +292,13 @@ static void scope_dump(Unit *u, FILE *f, const char *prefix) {
"%sScope State: %s\n"
"%sResult: %s\n"
"%sRuntimeMaxSec: %s\n"
"%sRuntimeRandomizedExtraSec: %s\n",
"%sRuntimeRandomizedExtraSec: %s\n"
"%sOOMPolicy: %s\n",
prefix, scope_state_to_string(s->state),
prefix, scope_result_to_string(s->result),
prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC),
prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC));
prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC),
prefix, oom_policy_to_string(s->oom_policy));
cgroup_context_dump(UNIT(s), f, prefix);
kill_context_dump(&s->kill_context, f, prefix);
@ -635,11 +643,16 @@ static void scope_notify_cgroup_oom_event(Unit *u, bool managed_oom) {
else
log_unit_debug(u, "Process of control group was killed by the OOM killer.");
/* This will probably need to be modified when scope units get an oom-policy */
if (s->oom_policy == OOM_CONTINUE)
return;
switch (s->state) {
case SCOPE_START_CHOWN:
case SCOPE_RUNNING:
scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_OOM_KILL);
break;
case SCOPE_STOP_SIGTERM:
scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_OOM_KILL);
break;

2
src/core/scope.h
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@ -38,6 +38,8 @@ struct Scope {
char *user;
char *group;
OOMPolicy oom_policy;
};
extern const UnitVTable scope_vtable;

3
src/shared/bus-unit-util.c
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@ -2142,6 +2142,9 @@ static int bus_append_scope_property(sd_bus_message *m, const char *field, const
if (STR_IN_SET(field, "User", "Group"))
return bus_append_string(m, field, eq);
if (streq(field, "OOMPolicy"))
return bus_append_string(m, field, eq);
return 0;
}