Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <stdio.h>
4 :
5 : #include "cgroup.h"
6 : #include "manager.h"
7 : #include "rm-rf.h"
8 : #include "test-helper.h"
9 : #include "tests.h"
10 : #include "unit.h"
11 :
12 1 : static int test_default_memory_low(void) {
13 1 : _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
14 1 : _cleanup_(manager_freep) Manager *m = NULL;
15 : Unit *root, *dml,
16 : *dml_passthrough, *dml_passthrough_empty, *dml_passthrough_set_dml, *dml_passthrough_set_ml,
17 : *dml_override, *dml_override_empty,
18 : *dml_discard, *dml_discard_empty, *dml_discard_set_ml;
19 : uint64_t dml_tree_default;
20 : int r;
21 :
22 1 : r = enter_cgroup_subroot();
23 1 : if (r == -ENOMEDIUM)
24 0 : return log_tests_skipped("cgroupfs not available");
25 :
26 1 : assert_se(set_unit_path(get_testdata_dir()) >= 0);
27 1 : assert_se(runtime_dir = setup_fake_runtime_dir());
28 1 : r = manager_new(UNIT_FILE_USER, MANAGER_TEST_RUN_BASIC, &m);
29 1 : if (IN_SET(r, -EPERM, -EACCES)) {
30 0 : log_error_errno(r, "manager_new: %m");
31 0 : return log_tests_skipped("cannot create manager");
32 : }
33 :
34 1 : assert_se(r >= 0);
35 1 : assert_se(manager_startup(m, NULL, NULL) >= 0);
36 :
37 : /* dml.slice has DefaultMemoryLow=50. Beyond that, individual subhierarchies look like this:
38 : *
39 : * 1. dml-passthrough.slice sets MemoryLow=100. This should not affect its children, as only
40 : * DefaultMemoryLow is propagated, not MemoryLow. As such, all leaf services should end up with
41 : * memory.low as 50, inherited from dml.slice, *except* for dml-passthrough-set-ml.service, which
42 : * should have the value of 0, as it has MemoryLow explicitly set.
43 : *
44 : * ┌───────────┐
45 : * │ dml.slice │
46 : * └─────┬─────┘
47 : * MemoryLow=100
48 : * ┌───────────┴───────────┐
49 : * │ dml-passthrough.slice │
50 : * └───────────┬───────────┘
51 : * ┌───────────────────────────────────┼───────────────────────────────────┐
52 : * no new settings DefaultMemoryLow=15 MemoryLow=0
53 : * ┌───────────────┴───────────────┐ ┌────────────────┴────────────────┐ ┌───────────────┴────────────────┐
54 : * │ dml-passthrough-empty.service │ │ dml-passthrough-set-dml.service │ │ dml-passthrough-set-ml.service │
55 : * └───────────────────────────────┘ └─────────────────────────────────┘ └────────────────────────────────┘
56 : *
57 : * 2. dml-override.slice sets DefaultMemoryLow=10. As such, dml-override-empty.service should also
58 : * end up with a memory.low of 10. dml-override.slice should still have a memory.low of 50.
59 : *
60 : * ┌───────────┐
61 : * │ dml.slice │
62 : * └─────┬─────┘
63 : * DefaultMemoryLow=10
64 : * ┌─────────┴──────────┐
65 : * │ dml-override.slice │
66 : * └─────────┬──────────┘
67 : * no new settings
68 : * ┌─────────────┴──────────────┐
69 : * │ dml-override-empty.service │
70 : * └────────────────────────────┘
71 : *
72 : * 3. dml-discard.slice sets DefaultMemoryLow= with no rvalue. As such,
73 : * dml-discard-empty.service should end up with a value of 0.
74 : * dml-discard-explicit-ml.service sets MemoryLow=70, and as such should have that override the
75 : * reset DefaultMemoryLow value. dml-discard.slice should still have an eventual memory.low of 50.
76 : *
77 : * ┌───────────┐
78 : * │ dml.slice │
79 : * └─────┬─────┘
80 : * DefaultMemoryLow=
81 : * ┌─────────┴─────────┐
82 : * │ dml-discard.slice │
83 : * └─────────┬─────────┘
84 : * ┌──────────────┴───────────────┐
85 : * no new settings MemoryLow=15
86 : * ┌─────────────┴─────────────┐ ┌─────────────┴──────────────┐
87 : * │ dml-discard-empty.service │ │ dml-discard-set-ml.service │
88 : * └───────────────────────────┘ └────────────────────────────┘
89 : */
90 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml.slice", NULL, &dml) >= 0);
91 :
92 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough.slice", NULL, &dml_passthrough) >= 0);
93 1 : assert_se(UNIT_DEREF(dml_passthrough->slice) == dml);
94 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-empty.service", NULL, &dml_passthrough_empty) >= 0);
95 1 : assert_se(UNIT_DEREF(dml_passthrough_empty->slice) == dml_passthrough);
96 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-dml.service", NULL, &dml_passthrough_set_dml) >= 0);
97 1 : assert_se(UNIT_DEREF(dml_passthrough_set_dml->slice) == dml_passthrough);
98 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-passthrough-set-ml.service", NULL, &dml_passthrough_set_ml) >= 0);
99 1 : assert_se(UNIT_DEREF(dml_passthrough_set_ml->slice) == dml_passthrough);
100 :
101 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-override.slice", NULL, &dml_override) >= 0);
102 1 : assert_se(UNIT_DEREF(dml_override->slice) == dml);
103 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-override-empty.service", NULL, &dml_override_empty) >= 0);
104 1 : assert_se(UNIT_DEREF(dml_override_empty->slice) == dml_override);
105 :
106 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-discard.slice", NULL, &dml_discard) >= 0);
107 1 : assert_se(UNIT_DEREF(dml_discard->slice) == dml);
108 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-discard-empty.service", NULL, &dml_discard_empty) >= 0);
109 1 : assert_se(UNIT_DEREF(dml_discard_empty->slice) == dml_discard);
110 1 : assert_se(manager_load_startable_unit_or_warn(m, "dml-discard-set-ml.service", NULL, &dml_discard_set_ml) >= 0);
111 1 : assert_se(UNIT_DEREF(dml_discard_set_ml->slice) == dml_discard);
112 :
113 1 : root = UNIT_DEREF(dml->slice);
114 1 : assert_se(!UNIT_ISSET(root->slice));
115 :
116 1 : assert_se(unit_get_ancestor_memory_low(root) == CGROUP_LIMIT_MIN);
117 :
118 1 : assert_se(unit_get_ancestor_memory_low(dml) == CGROUP_LIMIT_MIN);
119 1 : dml_tree_default = unit_get_cgroup_context(dml)->default_memory_low;
120 1 : assert_se(dml_tree_default == 50);
121 :
122 1 : assert_se(unit_get_ancestor_memory_low(dml_passthrough) == 100);
123 1 : assert_se(unit_get_ancestor_memory_low(dml_passthrough_empty) == dml_tree_default);
124 1 : assert_se(unit_get_ancestor_memory_low(dml_passthrough_set_dml) == 50);
125 1 : assert_se(unit_get_ancestor_memory_low(dml_passthrough_set_ml) == 0);
126 :
127 1 : assert_se(unit_get_ancestor_memory_low(dml_override) == dml_tree_default);
128 1 : assert_se(unit_get_ancestor_memory_low(dml_override_empty) == 10);
129 :
130 1 : assert_se(unit_get_ancestor_memory_low(dml_discard) == dml_tree_default);
131 1 : assert_se(unit_get_ancestor_memory_low(dml_discard_empty) == CGROUP_LIMIT_MIN);
132 1 : assert_se(unit_get_ancestor_memory_low(dml_discard_set_ml) == 15);
133 :
134 1 : return 0;
135 : }
136 :
137 1 : int main(int argc, char* argv[]) {
138 1 : int rc = EXIT_SUCCESS;
139 :
140 1 : test_setup_logging(LOG_DEBUG);
141 :
142 1 : TEST_REQ_RUNNING_SYSTEMD(rc = test_default_memory_low());
143 :
144 1 : return rc;
145 : }
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