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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <stdio.h>
#include "cgroup.h"
#include "manager.h"
#include "rm-rf.h"
#include "tests.h"
#include "unit.h"
TEST_RET(default_memory_low, .sd_booted = true) {
_cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
_cleanup_(manager_freep) Manager *m = NULL;
Unit *root, *dml,
*dml_passthrough, *dml_passthrough_empty, *dml_passthrough_set_dml, *dml_passthrough_set_ml,
*dml_override, *dml_override_empty,
*dml_discard, *dml_discard_empty, *dml_discard_set_ml;
uint64_t dml_tree_default;
int r;
r = enter_cgroup_subroot(NULL);
if (r == -ENOMEDIUM)
return log_tests_skipped("cgroupfs not available");
_cleanup_free_ char *unit_dir = NULL;
ASSERT_OK(get_testdata_dir("units", &unit_dir));
ASSERT_OK(set_unit_path(unit_dir));
assert_se(runtime_dir = setup_fake_runtime_dir());
r = manager_new(RUNTIME_SCOPE_USER, MANAGER_TEST_RUN_BASIC, &m);
if (IN_SET(r, -EPERM, -EACCES)) {
log_error_errno(r, "manager_new: %m");
return log_tests_skipped("cannot create manager");
}
ASSERT_OK(r);
ASSERT_OK(manager_startup(m, NULL, NULL, NULL));
/* dml.slice has DefaultMemoryLow=50. Beyond that, individual subhierarchies look like this:
*
* 1. dml-passthrough.slice sets MemoryLow=100. This should not affect its children, as only
* DefaultMemoryLow is propagated, not MemoryLow. As such, all leaf services should end up with
* memory.low as 50, inherited from dml.slice, *except* for dml-passthrough-set-ml.service, which
* should have the value of 0, as it has MemoryLow explicitly set.
*
* ┌───────────┐
* │ dml.slice │
* └─────┬─────┘
* MemoryLow=100
* ┌───────────┴───────────┐
* │ dml-passthrough.slice │
* └───────────┬───────────┘
* ┌───────────────────────────────────┼───────────────────────────────────┐
* no new settings DefaultMemoryLow=15 MemoryLow=0
* ┌───────────────┴───────────────┐ ┌────────────────┴────────────────┐ ┌───────────────┴────────────────┐
* │ dml-passthrough-empty.service │ │ dml-passthrough-set-dml.service │ │ dml-passthrough-set-ml.service │
* └───────────────────────────────┘ └─────────────────────────────────┘ └────────────────────────────────┘
*
* 2. dml-override.slice sets DefaultMemoryLow=10. As such, dml-override-empty.service should also
* end up with a memory.low of 10. dml-override.slice should still have a memory.low of 50.
*
* ┌───────────┐
* │ dml.slice │
* └─────┬─────┘
* DefaultMemoryLow=10
* ┌─────────┴──────────┐
* │ dml-override.slice │
* └─────────┬──────────┘
* no new settings
* ┌─────────────┴──────────────┐
* │ dml-override-empty.service │
* └────────────────────────────┘
*
* 3. dml-discard.slice sets DefaultMemoryLow= with no rvalue. As such,
* dml-discard-empty.service should end up with a value of 0.
* dml-discard-set-ml.service sets MemoryLow=15, and as such should have that override the
* reset DefaultMemoryLow value. dml-discard.slice should still have an eventual memory.low of 50.
*
* ┌───────────┐
* │ dml.slice │
* └─────┬─────┘
* DefaultMemoryLow=
* ┌─────────┴─────────┐
* │ dml-discard.slice │
* └─────────┬─────────┘
* ┌──────────────┴───────────────┐
* no new settings MemoryLow=15
* ┌─────────────┴─────────────┐ ┌─────────────┴──────────────┐
* │ dml-discard-empty.service │ │ dml-discard-set-ml.service │
* └───────────────────────────┘ └────────────────────────────┘
*/
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml.slice", NULL, &dml));
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-passthrough.slice", NULL, &dml_passthrough));
assert_se(UNIT_GET_SLICE(dml_passthrough) == dml);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-passthrough-empty.service", NULL, &dml_passthrough_empty));
assert_se(UNIT_GET_SLICE(dml_passthrough_empty) == dml_passthrough);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-dml.service", NULL, &dml_passthrough_set_dml));
assert_se(UNIT_GET_SLICE(dml_passthrough_set_dml) == dml_passthrough);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-ml.service", NULL, &dml_passthrough_set_ml));
assert_se(UNIT_GET_SLICE(dml_passthrough_set_ml) == dml_passthrough);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-override.slice", NULL, &dml_override));
assert_se(UNIT_GET_SLICE(dml_override) == dml);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-override-empty.service", NULL, &dml_override_empty));
assert_se(UNIT_GET_SLICE(dml_override_empty) == dml_override);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-discard.slice", NULL, &dml_discard));
assert_se(UNIT_GET_SLICE(dml_discard) == dml);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-discard-empty.service", NULL, &dml_discard_empty));
assert_se(UNIT_GET_SLICE(dml_discard_empty) == dml_discard);
ASSERT_OK(manager_load_startable_unit_or_warn(m, "dml-discard-set-ml.service", NULL, &dml_discard_set_ml));
assert_se(UNIT_GET_SLICE(dml_discard_set_ml) == dml_discard);
assert_se(root = UNIT_GET_SLICE(dml));
assert_se(!UNIT_GET_SLICE(root));
assert_se(unit_get_ancestor_memory_low(root) == CGROUP_LIMIT_MIN);
assert_se(unit_get_ancestor_memory_low(dml) == CGROUP_LIMIT_MIN);
dml_tree_default = unit_get_cgroup_context(dml)->default_memory_low;
assert_se(dml_tree_default == 50);
assert_se(unit_get_ancestor_memory_low(dml_passthrough) == 100);
assert_se(unit_get_ancestor_memory_low(dml_passthrough_empty) == dml_tree_default);
assert_se(unit_get_ancestor_memory_low(dml_passthrough_set_dml) == 50);
assert_se(unit_get_ancestor_memory_low(dml_passthrough_set_ml) == 0);
assert_se(unit_get_ancestor_memory_low(dml_override) == dml_tree_default);
assert_se(unit_get_ancestor_memory_low(dml_override_empty) == 10);
assert_se(unit_get_ancestor_memory_low(dml_discard) == dml_tree_default);
assert_se(unit_get_ancestor_memory_low(dml_discard_empty) == CGROUP_LIMIT_MIN);
assert_se(unit_get_ancestor_memory_low(dml_discard_set_ml) == 15);
return 0;
}
DEFINE_TEST_MAIN(LOG_DEBUG);
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