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Diffstat (limited to '')
| -rw-r--r-- | src/test/test-cgroup-unit-default.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/test/test-cgroup-unit-default.c b/src/test/test-cgroup-unit-default.c new file mode 100644 index 0000000..b03f6ff --- /dev/null +++ b/src/test/test-cgroup-unit-default.c @@ -0,0 +1,146 @@ +/* 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" + +static int test_default_memory_low(void) { + _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_se(get_testdata_dir("units", &unit_dir) >= 0); + assert_se(set_unit_path(unit_dir) >= 0); + assert_se(runtime_dir = setup_fake_runtime_dir()); + r = manager_new(UNIT_FILE_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_se(r >= 0); + assert_se(manager_startup(m, NULL, NULL) >= 0); + + /* 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_se(manager_load_startable_unit_or_warn(m, "dml.slice", NULL, &dml) >= 0); + + assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough.slice", NULL, &dml_passthrough) >= 0); + assert_se(UNIT_DEREF(dml_passthrough->slice) == dml); + assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-empty.service", NULL, &dml_passthrough_empty) >= 0); + assert_se(UNIT_DEREF(dml_passthrough_empty->slice) == dml_passthrough); + assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-dml.service", NULL, &dml_passthrough_set_dml) >= 0); + assert_se(UNIT_DEREF(dml_passthrough_set_dml->slice) == dml_passthrough); + assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-ml.service", NULL, &dml_passthrough_set_ml) >= 0); + assert_se(UNIT_DEREF(dml_passthrough_set_ml->slice) == dml_passthrough); + + assert_se(manager_load_startable_unit_or_warn(m, "dml-override.slice", NULL, &dml_override) >= 0); + assert_se(UNIT_DEREF(dml_override->slice) == dml); + assert_se(manager_load_startable_unit_or_warn(m, "dml-override-empty.service", NULL, &dml_override_empty) >= 0); + assert_se(UNIT_DEREF(dml_override_empty->slice) == dml_override); + + assert_se(manager_load_startable_unit_or_warn(m, "dml-discard.slice", NULL, &dml_discard) >= 0); + assert_se(UNIT_DEREF(dml_discard->slice) == dml); + assert_se(manager_load_startable_unit_or_warn(m, "dml-discard-empty.service", NULL, &dml_discard_empty) >= 0); + assert_se(UNIT_DEREF(dml_discard_empty->slice) == dml_discard); + assert_se(manager_load_startable_unit_or_warn(m, "dml-discard-set-ml.service", NULL, &dml_discard_set_ml) >= 0); + assert_se(UNIT_DEREF(dml_discard_set_ml->slice) == dml_discard); + + root = UNIT_DEREF(dml->slice); + assert_se(!UNIT_ISSET(root->slice)); + + 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; +} + +int main(int argc, char* argv[]) { + int rc = EXIT_SUCCESS; + + test_setup_logging(LOG_DEBUG); + + TEST_REQ_RUNNING_SYSTEMD(rc = test_default_memory_low()); + + return rc; +} |