diff options
| -rw-r--r-- | tools/testing/selftests/cgroup/.gitignore | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/cgroup/Makefile | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/cgroup/test_cpu.c | 110 |
3 files changed, 113 insertions, 0 deletions
diff --git a/tools/testing/selftests/cgroup/.gitignore b/tools/testing/selftests/cgroup/.gitignore index be9643ef6285..306ee1b01e72 100644 --- a/tools/testing/selftests/cgroup/.gitignore +++ b/tools/testing/selftests/cgroup/.gitignore @@ -4,3 +4,4 @@ test_core test_freezer test_kmem test_kill +test_cpu diff --git a/tools/testing/selftests/cgroup/Makefile b/tools/testing/selftests/cgroup/Makefile index 745fe25fa0b9..478217cc1371 100644 --- a/tools/testing/selftests/cgroup/Makefile +++ b/tools/testing/selftests/cgroup/Makefile @@ -10,6 +10,7 @@ TEST_GEN_PROGS += test_kmem TEST_GEN_PROGS += test_core TEST_GEN_PROGS += test_freezer TEST_GEN_PROGS += test_kill +TEST_GEN_PROGS += test_cpu LOCAL_HDRS += $(selfdir)/clone3/clone3_selftests.h $(selfdir)/pidfd/pidfd.h @@ -20,3 +21,4 @@ $(OUTPUT)/test_kmem: cgroup_util.c $(OUTPUT)/test_core: cgroup_util.c $(OUTPUT)/test_freezer: cgroup_util.c $(OUTPUT)/test_kill: cgroup_util.c +$(OUTPUT)/test_cpu: cgroup_util.c diff --git a/tools/testing/selftests/cgroup/test_cpu.c b/tools/testing/selftests/cgroup/test_cpu.c new file mode 100644 index 000000000000..a724bff00d07 --- /dev/null +++ b/tools/testing/selftests/cgroup/test_cpu.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE +#include <linux/limits.h> +#include <stdio.h> + +#include "../kselftest.h" +#include "cgroup_util.h" + +/* + * This test creates two nested cgroups with and without enabling + * the cpu controller. + */ +static int test_cpucg_subtree_control(const char *root) +{ + char *parent = NULL, *child = NULL, *parent2 = NULL, *child2 = NULL; + int ret = KSFT_FAIL; + + // Create two nested cgroups with the cpu controller enabled. + parent = cg_name(root, "cpucg_test_0"); + if (!parent) + goto cleanup; + + if (cg_create(parent)) + goto cleanup; + + if (cg_write(parent, "cgroup.subtree_control", "+cpu")) + goto cleanup; + + child = cg_name(parent, "cpucg_test_child"); + if (!child) + goto cleanup; + + if (cg_create(child)) + goto cleanup; + + if (cg_read_strstr(child, "cgroup.controllers", "cpu")) + goto cleanup; + + // Create two nested cgroups without enabling the cpu controller. + parent2 = cg_name(root, "cpucg_test_1"); + if (!parent2) + goto cleanup; + + if (cg_create(parent2)) + goto cleanup; + + child2 = cg_name(parent2, "cpucg_test_child"); + if (!child2) + goto cleanup; + + if (cg_create(child2)) + goto cleanup; + + if (!cg_read_strstr(child2, "cgroup.controllers", "cpu")) + goto cleanup; + + ret = KSFT_PASS; + +cleanup: + cg_destroy(child); + free(child); + cg_destroy(child2); + free(child2); + cg_destroy(parent); + free(parent); + cg_destroy(parent2); + free(parent2); + + return ret; +} + +#define T(x) { x, #x } +struct cpucg_test { + int (*fn)(const char *root); + const char *name; +} tests[] = { + T(test_cpucg_subtree_control), +}; +#undef T + +int main(int argc, char *argv[]) +{ + char root[PATH_MAX]; + int i, ret = EXIT_SUCCESS; + + if (cg_find_unified_root(root, sizeof(root))) + ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "cpu")) + if (cg_write(root, "cgroup.subtree_control", "+cpu")) + ksft_exit_skip("Failed to set cpu controller\n"); + + for (i = 0; i < ARRAY_SIZE(tests); i++) { + switch (tests[i].fn(root)) { + case KSFT_PASS: + ksft_test_result_pass("%s\n", tests[i].name); + break; + case KSFT_SKIP: + ksft_test_result_skip("%s\n", tests[i].name); + break; + default: + ret = EXIT_FAILURE; + ksft_test_result_fail("%s\n", tests[i].name); + break; + } + } + + return ret; +} |