Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 466 insertions, 0 deletions

diff --git a/src/test/test-cgroup-util.c b/src/test/test-cgroup-util.c
new file mode 100644
index 0000000..51f52d9
--- /dev/null
+++ b/src/test/test-cgroup-util.c
@@ -0,0 +1,466 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "cgroup-util.h"
+#include "dirent-util.h"
+#include "errno-util.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+#include "special.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tests.h"
+#include "user-util.h"
+
+static void check_p_d_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
+        int r;
+
+        r = cg_path_decode_unit(path, &unit);
+        printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, strnull(result), code);
+        assert_se(r == code);
+        assert_se(streq_ptr(unit, result));
+}
+
+TEST(path_decode_unit) {
+        check_p_d_u("getty@tty2.service", 0, "getty@tty2.service");
+        check_p_d_u("getty@tty2.service/", 0, "getty@tty2.service");
+        check_p_d_u("getty@tty2.service/xxx", 0, "getty@tty2.service");
+        check_p_d_u("getty@.service/", -ENXIO, NULL);
+        check_p_d_u("getty@.service", -ENXIO, NULL);
+        check_p_d_u("getty.service", 0, "getty.service");
+        check_p_d_u("getty", -ENXIO, NULL);
+        check_p_d_u("getty/waldo", -ENXIO, NULL);
+        check_p_d_u("_cpu.service", 0, "cpu.service");
+}
+
+static void check_p_g_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
+        int r;
+
+        r = cg_path_get_unit(path, &unit);
+        printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, strnull(result), code);
+        assert_se(r == code);
+        assert_se(streq_ptr(unit, result));
+}
+
+TEST(path_get_unit) {
+        check_p_g_u("/system.slice/foobar.service/sdfdsaf", 0, "foobar.service");
+        check_p_g_u("/system.slice/getty@tty5.service", 0, "getty@tty5.service");
+        check_p_g_u("/system.slice/getty@tty5.service/aaa/bbb", 0, "getty@tty5.service");
+        check_p_g_u("/system.slice/getty@tty5.service/", 0, "getty@tty5.service");
+        check_p_g_u("/system.slice/getty@tty6.service/tty5", 0, "getty@tty6.service");
+        check_p_g_u("sadfdsafsda", -ENXIO, NULL);
+        check_p_g_u("/system.slice/getty####@tty6.service/xxx", -ENXIO, NULL);
+        check_p_g_u("/system.slice/system-waldo.slice/foobar.service/sdfdsaf", 0, "foobar.service");
+        check_p_g_u("/system.slice/system-waldo.slice/_cpu.service/sdfdsaf", 0, "cpu.service");
+        check_p_g_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "user@1000.service");
+        check_p_g_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
+}
+
+static void check_p_g_u_p(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit_path = NULL;
+        int r;
+
+        r = cg_path_get_unit_path(path, &unit_path);
+        printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit_path, r, strnull(result), code);
+        assert_se(r == code);
+        assert_se(streq_ptr(unit_path, result));
+}
+
+TEST(path_get_unit_path) {
+        check_p_g_u_p("/system.slice/foobar.service/sdfdsaf", 0, "/system.slice/foobar.service");
+        check_p_g_u_p("/system.slice/getty@tty5.service", 0, "/system.slice/getty@tty5.service");
+        check_p_g_u_p("/system.slice/getty@tty5.service/aaa/bbb", 0, "/system.slice/getty@tty5.service");
+        check_p_g_u_p("/system.slice/getty@tty5.service/", 0, "/system.slice/getty@tty5.service");
+        check_p_g_u_p("/system.slice/getty@tty6.service/tty5", 0, "/system.slice/getty@tty6.service");
+        check_p_g_u_p("sadfdsafsda", -ENXIO, NULL);
+        check_p_g_u_p("/system.slice/getty####@tty6.service/xxx", -ENXIO, NULL);
+        check_p_g_u_p("/system.slice/system-waldo.slice/foobar.service/sdfdsaf", 0, "/system.slice/system-waldo.slice/foobar.service");
+        check_p_g_u_p("/system.slice/system-waldo.slice/_cpu.service/sdfdsaf", 0, "/system.slice/system-waldo.slice/_cpu.service");
+        check_p_g_u_p("/system.slice/system-waldo.slice/_cpu.service", 0, "/system.slice/system-waldo.slice/_cpu.service");
+        check_p_g_u_p("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "/user.slice/user-1000.slice/user@1000.service");
+        check_p_g_u_p("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
+        check_p_g_u_p("/user.slice/_user-1000.slice/user@1000.service/foobar.slice/foobar@pie.service", 0, "/user.slice/_user-1000.slice/user@1000.service");
+        check_p_g_u_p("/_session-2.scope/_foobar@pie.service/pa/po", 0, "/_session-2.scope");
+}
+
+static void check_p_g_u_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
+        int r;
+
+        r = cg_path_get_user_unit(path, &unit);
+        printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, strnull(result), code);
+        assert_se(r == code);
+        assert_se(streq_ptr(unit, result));
+}
+
+TEST(path_get_user_unit) {
+        check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "foobar.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo.slice/foobar.service", 0, "foobar.service");
+        check_p_g_u_u("/user.slice/user-1002.slice/session-2.scope/foobar.service/waldo", 0, "foobar.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service/waldo/uuuux", 0, "foobar.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo/waldo/uuuux", -ENXIO, NULL);
+        check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
+        check_p_g_u_u("/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
+        check_p_g_u_u("/xyz.slice/xyz-waldo.slice/session-77.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
+        check_p_g_u_u("/meh.service", -ENXIO, NULL);
+        check_p_g_u_u("/session-3.scope/_cpu.service", 0, "cpu.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "server.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/foobar.slice/foobar@pie.service", 0, "foobar@pie.service");
+        check_p_g_u_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
+}
+
+static void check_p_g_s(const char *path, int code, const char *result) {
+        _cleanup_free_ char *s = NULL;
+
+        assert_se(cg_path_get_session(path, &s) == code);
+        assert_se(streq_ptr(s, result));
+}
+
+TEST(path_get_session) {
+        check_p_g_s("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "2");
+        check_p_g_s("/session-3.scope", 0, "3");
+        check_p_g_s("/session-.scope", -ENXIO, NULL);
+        check_p_g_s("", -ENXIO, NULL);
+}
+
+static void check_p_g_o_u(const char *path, int code, uid_t result) {
+        uid_t uid = 0;
+
+        assert_se(cg_path_get_owner_uid(path, &uid) == code);
+        assert_se(uid == result);
+}
+
+TEST(path_get_owner_uid) {
+        check_p_g_o_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, 1000);
+        check_p_g_o_u("/user.slice/user-1006.slice", 0, 1006);
+        check_p_g_o_u("", -ENXIO, 0);
+}
+
+static void check_p_g_slice(const char *path, int code, const char *result) {
+        _cleanup_free_ char *s = NULL;
+
+        assert_se(cg_path_get_slice(path, &s) == code);
+        assert_se(streq_ptr(s, result));
+}
+
+TEST(path_get_slice) {
+        check_p_g_slice("/user.slice", 0, "user.slice");
+        check_p_g_slice("/foobar", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_slice("/user.slice/user-waldo.slice", 0, "user-waldo.slice");
+        check_p_g_slice("", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_slice("foobar", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_slice("foobar.slice", 0, "foobar.slice");
+        check_p_g_slice("foo.slice/foo-bar.slice/waldo.service", 0, "foo-bar.slice");
+}
+
+static void check_p_g_u_slice(const char *path, int code, const char *result) {
+        _cleanup_free_ char *s = NULL;
+
+        assert_se(cg_path_get_user_slice(path, &s) == code);
+        assert_se(streq_ptr(s, result));
+}
+
+TEST(path_get_user_slice) {
+        check_p_g_u_slice("/user.slice", -ENXIO, NULL);
+        check_p_g_u_slice("/foobar", -ENXIO, NULL);
+        check_p_g_u_slice("/user.slice/user-waldo.slice", -ENXIO, NULL);
+        check_p_g_u_slice("", -ENXIO, NULL);
+        check_p_g_u_slice("foobar", -ENXIO, NULL);
+        check_p_g_u_slice("foobar.slice", -ENXIO, NULL);
+        check_p_g_u_slice("foo.slice/foo-bar.slice/waldo.service", -ENXIO, NULL);
+
+        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service///", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/waldo.service", 0, SPECIAL_ROOT_SLICE);
+        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/piep.slice/foo.service", 0, "piep.slice");
+        check_p_g_u_slice("/foo.slice//foo-bar.slice/user@1000.service/piep.slice//piep-pap.slice//foo.service", 0, "piep-pap.slice");
+}
+
+TEST(get_paths, .sd_booted = true) {
+        _cleanup_free_ char *a = NULL;
+
+        assert_se(cg_get_root_path(&a) >= 0);
+        log_info("Root = %s", a);
+}
+
+TEST(proc) {
+        _cleanup_closedir_ DIR *d = NULL;
+        int r;
+
+        assert_se(proc_dir_open(&d) >= 0);
+
+        for (;;) {
+                _cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
+                _cleanup_(pidref_done) PidRef pid = PIDREF_NULL;
+                uid_t uid = UID_INVALID;
+
+                r = proc_dir_read_pidref(d, &pid);
+                assert_se(r >= 0);
+
+                if (r == 0)
+                        break;
+
+                if (pidref_is_kernel_thread(&pid) != 0)
+                        continue;
+
+                cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid.pid, &path);
+                cg_pid_get_path_shifted(pid.pid, NULL, &path_shifted);
+                cg_pid_get_owner_uid(pid.pid, &uid);
+                cg_pid_get_session(pid.pid, &session);
+                cg_pid_get_unit(pid.pid, &unit);
+                cg_pid_get_user_unit(pid.pid, &user_unit);
+                cg_pid_get_machine_name(pid.pid, &machine);
+                cg_pid_get_slice(pid.pid, &slice);
+
+                printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
+                       pid.pid,
+                       path,
+                       path_shifted,
+                       uid,
+                       session,
+                       unit,
+                       user_unit,
+                       machine,
+                       slice);
+        }
+}
+
+static void test_escape_one(const char *s, const char *expected) {
+        _cleanup_free_ char *b = NULL;
+
+        assert_se(s);
+        assert_se(expected);
+
+        assert_se(cg_escape(s, &b) >= 0);
+        assert_se(streq(b, expected));
+
+        assert_se(streq(cg_unescape(b), s));
+
+        assert_se(filename_is_valid(b));
+        assert_se(!cg_needs_escape(s) || b[0] == '_');
+}
+
+TEST(escape, .sd_booted = true) {
+        test_escape_one("foobar", "foobar");
+        test_escape_one(".foobar", "_.foobar");
+        test_escape_one("foobar.service", "foobar.service");
+        test_escape_one("cgroup.service", "_cgroup.service");
+        test_escape_one("tasks", "_tasks");
+        if (access("/sys/fs/cgroup/cpu", F_OK) == 0)
+                test_escape_one("cpu.service", "_cpu.service");
+        test_escape_one("_foobar", "__foobar");
+        test_escape_one("", "_");
+        test_escape_one("_", "__");
+        test_escape_one(".", "_.");
+}
+
+TEST(controller_is_valid) {
+        assert_se(cg_controller_is_valid("foobar"));
+        assert_se(cg_controller_is_valid("foo_bar"));
+        assert_se(cg_controller_is_valid("name=foo"));
+        assert_se(!cg_controller_is_valid(""));
+        assert_se(!cg_controller_is_valid("name="));
+        assert_se(!cg_controller_is_valid("="));
+        assert_se(!cg_controller_is_valid("cpu,cpuacct"));
+        assert_se(!cg_controller_is_valid("_"));
+        assert_se(!cg_controller_is_valid("_foobar"));
+        assert_se(!cg_controller_is_valid("tatü"));
+}
+
+static void test_slice_to_path_one(const char *unit, const char *path, int error) {
+        _cleanup_free_ char *ret = NULL;
+        int r;
+
+        log_info("unit: %s", unit);
+
+        r = cg_slice_to_path(unit, &ret);
+        log_info("actual: %s / %d", strnull(ret), r);
+        log_info("expect: %s / %d", strnull(path), error);
+        assert_se(r == error);
+        assert_se(streq_ptr(ret, path));
+}
+
+TEST(slice_to_path) {
+        test_slice_to_path_one("foobar.slice", "foobar.slice", 0);
+        test_slice_to_path_one("foobar-waldo.slice", "foobar.slice/foobar-waldo.slice", 0);
+        test_slice_to_path_one("foobar-waldo.service", NULL, -EINVAL);
+        test_slice_to_path_one(SPECIAL_ROOT_SLICE, "", 0);
+        test_slice_to_path_one("--.slice", NULL, -EINVAL);
+        test_slice_to_path_one("-", NULL, -EINVAL);
+        test_slice_to_path_one("-foo-.slice", NULL, -EINVAL);
+        test_slice_to_path_one("-foo.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo-.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo--bar.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo.slice/foo--bar.slice", NULL, -EINVAL);
+        test_slice_to_path_one("a-b.slice", "a.slice/a-b.slice", 0);
+        test_slice_to_path_one("a-b-c-d-e.slice", "a.slice/a-b.slice/a-b-c.slice/a-b-c-d.slice/a-b-c-d-e.slice", 0);
+
+        test_slice_to_path_one("foobar@.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foobar@waldo.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foobar@waldo.service", NULL, -EINVAL);
+        test_slice_to_path_one("-foo@-.slice", NULL, -EINVAL);
+        test_slice_to_path_one("-foo@.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo@-.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo@@bar.slice", NULL, -EINVAL);
+        test_slice_to_path_one("foo.slice/foo@@bar.slice", NULL, -EINVAL);
+}
+
+static void test_shift_path_one(const char *raw, const char *root, const char *shifted) {
+        const char *s = NULL;
+
+        assert_se(cg_shift_path(raw, root, &s) >= 0);
+        assert_se(streq(s, shifted));
+}
+
+TEST(shift_path) {
+        test_shift_path_one("/foobar/waldo", "/", "/foobar/waldo");
+        test_shift_path_one("/foobar/waldo", "", "/foobar/waldo");
+        test_shift_path_one("/foobar/waldo", "/foobar", "/waldo");
+        test_shift_path_one("/foobar/waldo", "/hogehoge", "/foobar/waldo");
+}
+
+TEST(mask_supported, .sd_booted = true) {
+        CGroupMask m;
+        CGroupController c;
+
+        assert_se(cg_mask_supported(&m) >= 0);
+
+        for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++)
+                printf("'%s' is supported: %s\n", cgroup_controller_to_string(c), yes_no(m & CGROUP_CONTROLLER_TO_MASK(c)));
+}
+
+TEST(is_cgroup_fs, .sd_booted = true) {
+        struct statfs sfs;
+        assert_se(statfs("/sys/fs/cgroup", &sfs) == 0);
+        if (is_temporary_fs(&sfs))
+                assert_se(statfs("/sys/fs/cgroup/systemd", &sfs) == 0);
+        assert_se(is_cgroup_fs(&sfs));
+}
+
+TEST(fd_is_cgroup_fs, .sd_booted = true) {
+        int fd;
+
+        fd = open("/sys/fs/cgroup", O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+        assert_se(fd >= 0);
+        if (fd_is_temporary_fs(fd)) {
+                fd = safe_close(fd);
+                fd = open("/sys/fs/cgroup/systemd", O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+                assert_se(fd >= 0);
+        }
+        assert_se(fd_is_cgroup_fs(fd));
+        fd = safe_close(fd);
+}
+
+TEST(cg_tests) {
+        int all, hybrid, systemd, r;
+
+        r = cg_unified();
+        if (r == -ENOMEDIUM) {
+                log_tests_skipped("cgroup not mounted");
+                return;
+        }
+        assert_se(r >= 0);
+
+        all = cg_all_unified();
+        assert_se(IN_SET(all, 0, 1));
+
+        hybrid = cg_hybrid_unified();
+        assert_se(IN_SET(hybrid, 0, 1));
+
+        systemd = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER);
+        assert_se(IN_SET(systemd, 0, 1));
+
+        if (all) {
+                assert_se(systemd);
+                assert_se(!hybrid);
+
+        } else if (hybrid) {
+                assert_se(systemd);
+                assert_se(!all);
+
+        } else
+                assert_se(!systemd);
+}
+
+TEST(cg_get_keyed_attribute) {
+        _cleanup_free_ char *val = NULL;
+        char *vals3[3] = {}, *vals3a[3] = {};
+        int i, r;
+
+        r = cg_get_keyed_attribute("cpu", "/init.scope", "no_such_file", STRV_MAKE("no_such_attr"), &val);
+        if (r == -ENOMEDIUM || ERRNO_IS_PRIVILEGE(r)) {
+                log_info_errno(r, "Skipping most of %s, /sys/fs/cgroup not accessible: %m", __func__);
+                return;
+        }
+
+        assert_se(r == -ENOENT);
+        assert_se(val == NULL);
+
+        if (access("/sys/fs/cgroup/init.scope/cpu.stat", R_OK) < 0) {
+                log_info_errno(errno, "Skipping most of %s, /init.scope/cpu.stat not accessible: %m", __func__);
+                return;
+        }
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("no_such_attr"), &val) == -ENXIO);
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat", STRV_MAKE("no_such_attr"), &val) == 0);
+        assert_se(val == NULL);
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec"), &val) == 0);
+        val = mfree(val);
+
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec"), &val) == 1);
+        log_info("cpu /init.scope cpu.stat [usage_usec] → \"%s\"", val);
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "no_such_attr"), vals3) == -ENXIO);
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "no_such_attr"), vals3) == 1);
+        assert_se(vals3[0] && !vals3[1]);
+        free(vals3[0]);
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "usage_usec"), vals3) == -ENXIO);
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "usage_usec"), vals3) == 1);
+        assert_se(vals3[0] && !vals3[1]);
+        free(vals3[0]);
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat",
+                                         STRV_MAKE("usage_usec", "user_usec", "system_usec"), vals3) == 0);
+        for (i = 0; i < 3; i++)
+                free(vals3[i]);
+
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat",
+                                         STRV_MAKE("usage_usec", "user_usec", "system_usec"), vals3) == 3);
+        log_info("cpu /init.scope cpu.stat [usage_usec user_usec system_usec] → \"%s\", \"%s\", \"%s\"",
+                 vals3[0], vals3[1], vals3[2]);
+
+        assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat",
+                                         STRV_MAKE("system_usec", "user_usec", "usage_usec"), vals3a) == 0);
+        for (i = 0; i < 3; i++)
+                free(vals3a[i]);
+
+        assert_se(cg_get_keyed_attribute_graceful("cpu", "/init.scope", "cpu.stat",
+                                         STRV_MAKE("system_usec", "user_usec", "usage_usec"), vals3a) == 3);
+        log_info("cpu /init.scope cpu.stat [system_usec user_usec usage_usec] → \"%s\", \"%s\", \"%s\"",
+                 vals3a[0], vals3a[1], vals3a[2]);
+
+        for (i = 0; i < 3; i++) {
+                free(vals3[i]);
+                free(vals3a[i]);
+        }
+}
+
+TEST(bfq_weight_conversion) {
+        assert_se(BFQ_WEIGHT(1) == 1);
+        assert_se(BFQ_WEIGHT(50) == 50);
+        assert_se(BFQ_WEIGHT(100) == 100);
+        assert_se(BFQ_WEIGHT(500) == 136);
+        assert_se(BFQ_WEIGHT(5000) == 545);
+        assert_se(BFQ_WEIGHT(10000) == 1000);
+}
+
+DEFINE_TEST_MAIN(LOG_DEBUG);