[thirdparty/systemd.git] / src / test / test-cgroup-util.c

/***
  This file is part of systemd.

  Copyright 2013 Zbigniew Jędrzejewski-Szmek

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include "alloc-util.h"
#include "build.h"
#include "cgroup-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "format-util.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "stat-util.h"
#include "string-util.h"
#include "test-helper.h"
#include "user-util.h"
#include "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, result, code);
        assert_se(r == code);
        assert_se(streq_ptr(unit, result));
}

static void test_path_decode_unit(void) {
        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, result, code);
        assert_se(r == code);
        assert_se(streq_ptr(unit, result));
}

static void test_path_get_unit(void) {
        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_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, result, code);
        assert_se(r == code);
        assert_se(streq_ptr(unit, result));
}

static void test_path_get_user_unit(void) {
        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));
}

static void test_path_get_session(void) {
        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);
}

static void test_path_get_owner_uid(void) {
        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));
}

static void test_path_get_slice(void) {
        check_p_g_slice("/user.slice", 0, "user.slice");
        check_p_g_slice("/foobar", 0, "-.slice");
        check_p_g_slice("/user.slice/user-waldo.slice", 0, "user-waldo.slice");
        check_p_g_slice("", 0, "-.slice");
        check_p_g_slice("foobar", 0, "-.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));
}

static void test_path_get_user_slice(void) {
        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, "-.slice");
        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/", 0, "-.slice");
        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service///", 0, "-.slice");
        check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/waldo.service", 0, "-.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");
}

static void test_get_paths(void) {
        _cleanup_free_ char *a = NULL;

        assert_se(cg_get_root_path(&a) >= 0);
        log_info("Root = %s", a);
}

static void test_proc(void) {
        _cleanup_closedir_ DIR *d = NULL;
        struct dirent *de;
        int r;

        d = opendir("/proc");
        assert_se(d);

        FOREACH_DIRENT(de, d, break) {
                _cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
                pid_t pid;
                uid_t uid = UID_INVALID;

                if (!IN_SET(de->d_type, DT_DIR, DT_UNKNOWN))
                        continue;

                r = parse_pid(de->d_name, &pid);
                if (r < 0)
                        continue;

                if (is_kernel_thread(pid))
                        continue;

                cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
                cg_pid_get_path_shifted(pid, NULL, &path_shifted);
                cg_pid_get_owner_uid(pid, &uid);
                cg_pid_get_session(pid, &session);
                cg_pid_get_unit(pid, &unit);
                cg_pid_get_user_unit(pid, &user_unit);
                cg_pid_get_machine_name(pid, &machine);
                cg_pid_get_slice(pid, &slice);

                printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
                       pid,
                       path,
                       path_shifted,
                       uid,
                       session,
                       unit,
                       user_unit,
                       machine,
                       slice);
        }
}

static void test_escape_one(const char *s, const char *r) {
        _cleanup_free_ char *b;

        b = cg_escape(s);
        assert_se(b);
        assert_se(streq(b, r));

        assert_se(streq(cg_unescape(b), s));
}

static void test_escape(void) {
        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(".", "_.");
}

static void test_controller_is_valid(void) {
        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;

        assert_se(cg_slice_to_path(unit, &ret) == error);
        assert_se(streq_ptr(ret, path));
}

static void test_slice_to_path(void) {

        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("-.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);
}

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));
}

static void test_shift_path(void) {

        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", "/fuckfuck", "/foobar/waldo");
}

static void test_mask_supported(void) {

        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)));
}

static void test_is_cgroup_fs(void) {
        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));
}

static void test_fd_is_cgroup_fs(void) {
        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);
}

static void test_is_wanted_print(bool header) {
        _cleanup_free_ char *cmdline = NULL;

        log_info("-- %s --", __func__);
        assert_se(proc_cmdline(&cmdline) >= 0);
        log_info("cmdline: %s", cmdline);
        if (header) {

                log_info(_CGROUP_HIEARCHY_);
                (void) system("findmnt -n /sys/fs/cgroup");
        }

        log_info("is_unified_wanted() → %s", yes_no(cg_is_unified_wanted()));
        log_info("is_hybrid_wanted() → %s", yes_no(cg_is_hybrid_wanted()));
        log_info("is_legacy_wanted() → %s", yes_no(cg_is_legacy_wanted()));
        log_info(" ");
}

static void test_is_wanted(void) {
        assert_se(setenv("SYSTEMD_PROC_CMDLINE",
                         "systemd.unified_cgroup_hierarchy", 1) >= 0);
        test_is_wanted_print(false);

        assert_se(setenv("SYSTEMD_PROC_CMDLINE",
                         "systemd.unified_cgroup_hierarchy=0", 1) >= 0);
        test_is_wanted_print(false);

        assert_se(setenv("SYSTEMD_PROC_CMDLINE",
                         "systemd.unified_cgroup_hierarchy=0 "
                         "systemd.legacy_systemd_cgroup_controller", 1) >= 0);
        test_is_wanted_print(false);

        assert_se(setenv("SYSTEMD_PROC_CMDLINE",
                         "systemd.unified_cgroup_hierarchy=0 "
                         "systemd.legacy_systemd_cgroup_controller=0", 1) >= 0);
        test_is_wanted_print(false);
}

static void test_cg_tests(void) {
        int all, hybrid, systemd;

        assert_se(cg_unified_flush() == 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);
}

int main(void) {
        log_set_max_level(LOG_DEBUG);
        log_parse_environment();
        log_open();

        test_path_decode_unit();
        test_path_get_unit();
        test_path_get_user_unit();
        test_path_get_session();
        test_path_get_owner_uid();
        test_path_get_slice();
        test_path_get_user_slice();
        TEST_REQ_RUNNING_SYSTEMD(test_get_paths());
        test_proc();
        TEST_REQ_RUNNING_SYSTEMD(test_escape());
        test_controller_is_valid();
        test_slice_to_path();
        test_shift_path();
        TEST_REQ_RUNNING_SYSTEMD(test_mask_supported());
        TEST_REQ_RUNNING_SYSTEMD(test_is_cgroup_fs());
        TEST_REQ_RUNNING_SYSTEMD(test_fd_is_cgroup_fs());
        test_is_wanted_print(true);
        test_is_wanted_print(false); /* run twice to test caching */
        test_is_wanted();
        test_cg_tests();

        return 0;
}
Commit	Line	Data
6c03089c LP	1	/***
	2	This file is part of systemd.
	3
	4	Copyright 2013 Zbigniew Jędrzejewski-Szmek
	5
	6	systemd is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU Lesser General Public License as published by
	8	the Free Software Foundation; either version 2.1 of the License, or
	9	(at your option) any later version.
	10
	11	systemd is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public License
	17	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	18	***/
	19
b5efdb8a	20	#include "alloc-util.h"
0a05dcc0	21	#include "build.h"
96cde13a	22	#include "cgroup-util.h"
a0956174	23	#include "dirent-util.h"
3ffd4af2	24	#include "fd-util.h"
f97b34a6	25	#include "format-util.h"
6bedfcbb	26	#include "parse-util.h"
0a05dcc0	27	#include "proc-cmdline.h"
0b452006	28	#include "process-util.h"
f0bef277	29	#include "stat-util.h"
07630cea	30	#include "string-util.h"
3ffd4af2	31	#include "test-helper.h"
ee104e11	32	#include "user-util.h"
3ffd4af2	33	#include "util.h"
96cde13a	34
7027ff61	35	static void check_p_d_u(const char path, int code, const char result) {
6c03089c	36	_cleanup_free_ char *unit = NULL;
d4fffc4b	37	int r;
96cde13a	38
d4fffc4b ZJS	39	r = cg_path_decode_unit(path, &unit);
	40	printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
	41	assert_se(r == code);
6c03089c LP	42	assert_se(streq_ptr(unit, result));
6c03089c LP	43	}
96cde13a	44
7027ff61	45	static void test_path_decode_unit(void) {
d7bd3de0 LP	46	check_p_d_u("getty@tty2.service", 0, "getty@tty2.service");
	47	check_p_d_u("getty@tty2.service/", 0, "getty@tty2.service");
	48	check_p_d_u("getty@tty2.service/xxx", 0, "getty@tty2.service");
cfeaa44a LP	49	check_p_d_u("getty@.service/", -ENXIO, NULL);
cfeaa44a LP	50	check_p_d_u("getty@.service", -ENXIO, NULL);
7027ff61	51	check_p_d_u("getty.service", 0, "getty.service");
cfeaa44a LP	52	check_p_d_u("getty", -ENXIO, NULL);
cfeaa44a LP	53	check_p_d_u("getty/waldo", -ENXIO, NULL);
d7bd3de0	54	check_p_d_u("_cpu.service", 0, "cpu.service");
6c03089c LP	55	}
	56
	57	static void check_p_g_u(const char path, int code, const char result) {
	58	_cleanup_free_ char *unit = NULL;
d4fffc4b	59	int r;
6c03089c	60
d4fffc4b ZJS	61	r = cg_path_get_unit(path, &unit);
	62	printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
	63	assert_se(r == code);
6c03089c LP	64	assert_se(streq_ptr(unit, result));
	65	}
	66
9444b1f2 LP	67	static void test_path_get_unit(void) {
9444b1f2 LP	68	check_p_g_u("/system.slice/foobar.service/sdfdsaf", 0, "foobar.service");
d7bd3de0 LP	69	check_p_g_u("/system.slice/getty@tty5.service", 0, "getty@tty5.service");
	70	check_p_g_u("/system.slice/getty@tty5.service/aaa/bbb", 0, "getty@tty5.service");
	71	check_p_g_u("/system.slice/getty@tty5.service/", 0, "getty@tty5.service");
9444b1f2	72	check_p_g_u("/system.slice/getty@tty6.service/tty5", 0, "getty@tty6.service");
cfeaa44a LP	73	check_p_g_u("sadfdsafsda", -ENXIO, NULL);
cfeaa44a LP	74	check_p_g_u("/system.slice/getty####@tty6.service/xxx", -ENXIO, NULL);
9444b1f2	75	check_p_g_u("/system.slice/system-waldo.slice/foobar.service/sdfdsaf", 0, "foobar.service");
d7bd3de0	76	check_p_g_u("/system.slice/system-waldo.slice/_cpu.service/sdfdsaf", 0, "cpu.service");
d4fffc4b	77	check_p_g_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "user@1000.service");
cfeaa44a	78	check_p_g_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
9444b1f2 LP	79	}
9444b1f2 LP	80
6c03089c LP	81	static void check_p_g_u_u(const char path, int code, const char result) {
6c03089c LP	82	_cleanup_free_ char *unit = NULL;
d4fffc4b	83	int r;
6c03089c	84
d4fffc4b ZJS	85	r = cg_path_get_user_unit(path, &unit);
	86	printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
	87	assert_se(r == code);
6c03089c LP	88	assert_se(streq_ptr(unit, result));
	89	}
	90
9444b1f2	91	static void test_path_get_user_unit(void) {
374ec6ab LP	92	check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "foobar.service");
	93	check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo.slice/foobar.service", 0, "foobar.service");
	94	check_p_g_u_u("/user.slice/user-1002.slice/session-2.scope/foobar.service/waldo", 0, "foobar.service");
	95	check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service/waldo/uuuux", 0, "foobar.service");
cfeaa44a	96	check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo/waldo/uuuux", -ENXIO, NULL);
d7bd3de0 LP	97	check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
	98	check_p_g_u_u("/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
	99	check_p_g_u_u("/xyz.slice/xyz-waldo.slice/session-77.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
cfeaa44a	100	check_p_g_u_u("/meh.service", -ENXIO, NULL);
d7bd3de0	101	check_p_g_u_u("/session-3.scope/_cpu.service", 0, "cpu.service");
d4fffc4b	102	check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "server.service");
32081481	103	check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/foobar.slice/foobar@pie.service", 0, "foobar@pie.service");
cfeaa44a	104	check_p_g_u_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
7027ff61	105	}
6c03089c	106
9444b1f2 LP	107	static void check_p_g_s(const char path, int code, const char result) {
	108	_cleanup_free_ char *s = NULL;
	109
	110	assert_se(cg_path_get_session(path, &s) == code);
	111	assert_se(streq_ptr(s, result));
96cde13a ZJS	112	}
96cde13a ZJS	113
9444b1f2	114	static void test_path_get_session(void) {
374ec6ab LP	115	check_p_g_s("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "2");
374ec6ab LP	116	check_p_g_s("/session-3.scope", 0, "3");
cfeaa44a LP	117	check_p_g_s("/session-.scope", -ENXIO, NULL);
cfeaa44a LP	118	check_p_g_s("", -ENXIO, NULL);
9444b1f2	119	}
7027ff61	120
9444b1f2 LP	121	static void check_p_g_o_u(const char *path, int code, uid_t result) {
9444b1f2 LP	122	uid_t uid = 0;
7027ff61	123
9444b1f2 LP	124	assert_se(cg_path_get_owner_uid(path, &uid) == code);
	125	assert_se(uid == result);
	126	}
	127
	128	static void test_path_get_owner_uid(void) {
374ec6ab LP	129	check_p_g_o_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, 1000);
374ec6ab LP	130	check_p_g_o_u("/user.slice/user-1006.slice", 0, 1006);
cfeaa44a	131	check_p_g_o_u("", -ENXIO, 0);
9444b1f2	132	}
7027ff61	133
8b0849e9 LP	134	static void check_p_g_slice(const char path, int code, const char result) {
	135	_cleanup_free_ char *s = NULL;
	136
	137	assert_se(cg_path_get_slice(path, &s) == code);
	138	assert_se(streq_ptr(s, result));
	139	}
	140
	141	static void test_path_get_slice(void) {
	142	check_p_g_slice("/user.slice", 0, "user.slice");
	143	check_p_g_slice("/foobar", 0, "-.slice");
	144	check_p_g_slice("/user.slice/user-waldo.slice", 0, "user-waldo.slice");
	145	check_p_g_slice("", 0, "-.slice");
	146	check_p_g_slice("foobar", 0, "-.slice");
	147	check_p_g_slice("foobar.slice", 0, "foobar.slice");
	148	check_p_g_slice("foo.slice/foo-bar.slice/waldo.service", 0, "foo-bar.slice");
	149	}
	150
329ac4bc LP	151	static void check_p_g_u_slice(const char path, int code, const char result) {
	152	_cleanup_free_ char *s = NULL;
	153
	154	assert_se(cg_path_get_user_slice(path, &s) == code);
	155	assert_se(streq_ptr(s, result));
	156	}
	157
	158	static void test_path_get_user_slice(void) {
	159	check_p_g_u_slice("/user.slice", -ENXIO, NULL);
	160	check_p_g_u_slice("/foobar", -ENXIO, NULL);
	161	check_p_g_u_slice("/user.slice/user-waldo.slice", -ENXIO, NULL);
	162	check_p_g_u_slice("", -ENXIO, NULL);
	163	check_p_g_u_slice("foobar", -ENXIO, NULL);
	164	check_p_g_u_slice("foobar.slice", -ENXIO, NULL);
	165	check_p_g_u_slice("foo.slice/foo-bar.slice/waldo.service", -ENXIO, NULL);
	166
	167	check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service", 0, "-.slice");
	168	check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/", 0, "-.slice");
	169	check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service///", 0, "-.slice");
	170	check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/waldo.service", 0, "-.slice");
	171	check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/piep.slice/foo.service", 0, "piep.slice");
	172	check_p_g_u_slice("/foo.slice//foo-bar.slice/user@1000.service/piep.slice//piep-pap.slice//foo.service", 0, "piep-pap.slice");
	173	}
	174
9444b1f2 LP	175	static void test_get_paths(void) {
	176	_cleanup_free_ char *a = NULL;
	177
	178	assert_se(cg_get_root_path(&a) >= 0);
	179	log_info("Root = %s", a);
7027ff61 LP	180	}
7027ff61 LP	181
aff38e74 LP	182	static void test_proc(void) {
	183	_cleanup_closedir_ DIR *d = NULL;
	184	struct dirent *de;
	185	int r;
	186
	187	d = opendir("/proc");
	188	assert_se(d);
	189
	190	FOREACH_DIRENT(de, d, break) {
e9174f29	191	_cleanup_free_ char path = NULL, path_shifted = NULL, session = NULL, unit = NULL, user_unit = NULL, machine = NULL, *slice = NULL;
aff38e74	192	pid_t pid;
fed1e721	193	uid_t uid = UID_INVALID;
aff38e74	194
ec2ce0c5	195	if (!IN_SET(de->d_type, DT_DIR, DT_UNKNOWN))
aff38e74 LP	196	continue;
	197
	198	r = parse_pid(de->d_name, &pid);
	199	if (r < 0)
	200	continue;
	201
ae018d9b LP	202	if (is_kernel_thread(pid))
	203	continue;
	204
aff38e74	205	cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
e9174f29	206	cg_pid_get_path_shifted(pid, NULL, &path_shifted);
ae018d9b	207	cg_pid_get_owner_uid(pid, &uid);
aff38e74 LP	208	cg_pid_get_session(pid, &session);
	209	cg_pid_get_unit(pid, &unit);
	210	cg_pid_get_user_unit(pid, &user_unit);
	211	cg_pid_get_machine_name(pid, &machine);
1021b21b	212	cg_pid_get_slice(pid, &slice);
aff38e74	213
de0671ee ZJS	214	printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
de0671ee ZJS	215	pid,
aff38e74	216	path,
aff38e74	217	path_shifted,
de0671ee	218	uid,
aff38e74 LP	219	session,
	220	unit,
	221	user_unit,
1021b21b LP	222	machine,
1021b21b LP	223	slice);
aff38e74 LP	224	}
	225	}
	226
ae018d9b LP	227	static void test_escape_one(const char s, const char r) {
	228	_cleanup_free_ char *b;
	229
	230	b = cg_escape(s);
	231	assert_se(b);
	232	assert_se(streq(b, r));
	233
	234	assert_se(streq(cg_unescape(b), s));
	235	}
	236
	237	static void test_escape(void) {
	238	test_escape_one("foobar", "foobar");
a0ab5665	239	test_escape_one(".foobar", "_.foobar");
ae018d9b LP	240	test_escape_one("foobar.service", "foobar.service");
ae018d9b LP	241	test_escape_one("cgroup.service", "_cgroup.service");
ae018d9b	242	test_escape_one("tasks", "_tasks");
e13bb5d2 KS	243	if (access("/sys/fs/cgroup/cpu", F_OK) == 0)
e13bb5d2 KS	244	test_escape_one("cpu.service", "_cpu.service");
ae018d9b	245	test_escape_one("_foobar", "__foobar");
a0ab5665 LP	246	test_escape_one("", "_");
	247	test_escape_one("_", "__");
	248	test_escape_one(".", "_.");
ae018d9b LP	249	}
ae018d9b LP	250
78edb35a	251	static void test_controller_is_valid(void) {
185a0874 DJL	252	assert_se(cg_controller_is_valid("foobar"));
	253	assert_se(cg_controller_is_valid("foo_bar"));
	254	assert_se(cg_controller_is_valid("name=foo"));
	255	assert_se(!cg_controller_is_valid(""));
	256	assert_se(!cg_controller_is_valid("name="));
	257	assert_se(!cg_controller_is_valid("="));
	258	assert_se(!cg_controller_is_valid("cpu,cpuacct"));
	259	assert_se(!cg_controller_is_valid("_"));
	260	assert_se(!cg_controller_is_valid("_foobar"));
	261	assert_se(!cg_controller_is_valid("tatü"));
78edb35a LP	262	}
78edb35a LP	263
a016b922 LP	264	static void test_slice_to_path_one(const char unit, const char path, int error) {
	265	_cleanup_free_ char *ret = NULL;
	266
	267	assert_se(cg_slice_to_path(unit, &ret) == error);
	268	assert_se(streq_ptr(ret, path));
	269	}
	270
	271	static void test_slice_to_path(void) {
	272
	273	test_slice_to_path_one("foobar.slice", "foobar.slice", 0);
	274	test_slice_to_path_one("foobar-waldo.slice", "foobar.slice/foobar-waldo.slice", 0);
	275	test_slice_to_path_one("foobar-waldo.service", NULL, -EINVAL);
c96cc582 LP	276	test_slice_to_path_one("-.slice", "", 0);
	277	test_slice_to_path_one("--.slice", NULL, -EINVAL);
	278	test_slice_to_path_one("-", NULL, -EINVAL);
a016b922 LP	279	test_slice_to_path_one("-foo-.slice", NULL, -EINVAL);
a016b922 LP	280	test_slice_to_path_one("-foo.slice", NULL, -EINVAL);
c96cc582	281	test_slice_to_path_one("foo-.slice", NULL, -EINVAL);
e66e5b61	282	test_slice_to_path_one("foo--bar.slice", NULL, -EINVAL);
c96cc582	283	test_slice_to_path_one("foo.slice/foo--bar.slice", NULL, -EINVAL);
a016b922 LP	284	test_slice_to_path_one("a-b.slice", "a.slice/a-b.slice", 0);
	285	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);
	286	}
	287
751bc6ac LP	288	static void test_shift_path_one(const char raw, const char root, const char *shifted) {
	289	const char *s = NULL;
	290
	291	assert_se(cg_shift_path(raw, root, &s) >= 0);
	292	assert_se(streq(s, shifted));
	293	}
	294
	295	static void test_shift_path(void) {
	296
	297	test_shift_path_one("/foobar/waldo", "/", "/foobar/waldo");
	298	test_shift_path_one("/foobar/waldo", "", "/foobar/waldo");
	299	test_shift_path_one("/foobar/waldo", "/foobar", "/waldo");
	300	test_shift_path_one("/foobar/waldo", "/fuckfuck", "/foobar/waldo");
	301	}
	302
5f4c5fef LP	303	static void test_mask_supported(void) {
	304
	305	CGroupMask m;
	306	CGroupController c;
	307
	308	assert_se(cg_mask_supported(&m) >= 0);
	309
	310	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++)
	311	printf("'%s' is supported: %s\n", cgroup_controller_to_string(c), yes_no(m & CGROUP_CONTROLLER_TO_MASK(c)));
	312	}
	313
f0bef277 EV	314	static void test_is_cgroup_fs(void) {
	315	struct statfs sfs;
	316	assert_se(statfs("/sys/fs/cgroup", &sfs) == 0);
	317	if (is_temporary_fs(&sfs))
	318	assert_se(statfs("/sys/fs/cgroup/systemd", &sfs) == 0);
	319	assert_se(is_cgroup_fs(&sfs));
	320	}
	321
	322	static void test_fd_is_cgroup_fs(void) {
	323	int fd;
	324
	325	fd = open("/sys/fs/cgroup", O_RDONLY\|O_DIRECTORY\|O_CLOEXEC\|O_NOFOLLOW);
	326	assert_se(fd >= 0);
	327	if (fd_is_temporary_fs(fd)) {
	328	fd = safe_close(fd);
	329	fd = open("/sys/fs/cgroup/systemd", O_RDONLY\|O_DIRECTORY\|O_CLOEXEC\|O_NOFOLLOW);
	330	assert_se(fd >= 0);
	331	}
	332	assert_se(fd_is_cgroup_fs(fd));
	333	fd = safe_close(fd);
	334	}
	335
0a05dcc0 ZJS	336	static void test_is_wanted_print(bool header) {
	337	_cleanup_free_ char *cmdline = NULL;
	338
	339	log_info("-- %s --", __func__);
	340	assert_se(proc_cmdline(&cmdline) >= 0);
	341	log_info("cmdline: %s", cmdline);
	342	if (header) {
	343
	344	log_info(_CGROUP_HIEARCHY_);
	345	(void) system("findmnt -n /sys/fs/cgroup");
	346	}
	347
	348	log_info("is_unified_wanted() → %s", yes_no(cg_is_unified_wanted()));
	349	log_info("is_hybrid_wanted() → %s", yes_no(cg_is_hybrid_wanted()));
	350	log_info("is_legacy_wanted() → %s", yes_no(cg_is_legacy_wanted()));
	351	log_info(" ");
	352	}
	353
	354	static void test_is_wanted(void) {
	355	assert_se(setenv("SYSTEMD_PROC_CMDLINE",
	356	"systemd.unified_cgroup_hierarchy", 1) >= 0);
	357	test_is_wanted_print(false);
	358
	359	assert_se(setenv("SYSTEMD_PROC_CMDLINE",
	360	"systemd.unified_cgroup_hierarchy=0", 1) >= 0);
	361	test_is_wanted_print(false);
	362
	363	assert_se(setenv("SYSTEMD_PROC_CMDLINE",
	364	"systemd.unified_cgroup_hierarchy=0 "
	365	"systemd.legacy_systemd_cgroup_controller", 1) >= 0);
	366	test_is_wanted_print(false);
	367
	368	assert_se(setenv("SYSTEMD_PROC_CMDLINE",
	369	"systemd.unified_cgroup_hierarchy=0 "
	370	"systemd.legacy_systemd_cgroup_controller=0", 1) >= 0);
	371	test_is_wanted_print(false);
	372	}
	373
073e8f09 ZJS	374	static void test_cg_tests(void) {
	375	int all, hybrid, systemd;
	376
	377	assert_se(cg_unified_flush() == 0);
	378
	379	all = cg_all_unified();
	380	assert_se(IN_SET(all, 0, 1));
	381
	382	hybrid = cg_hybrid_unified();
	383	assert_se(IN_SET(hybrid, 0, 1));
	384
	385	systemd = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER);
	386	assert_se(IN_SET(systemd, 0, 1));
	387
	388	if (all) {
	389	assert_se(systemd);
	390	assert_se(!hybrid);
	391
	392	} else if (hybrid) {
	393	assert_se(systemd);
	394	assert_se(!all);
	395
	396	} else
	397	assert_se(!systemd);
	398	}
	399
96cde13a	400	int main(void) {
0a05dcc0 ZJS	401	log_set_max_level(LOG_DEBUG);
	402	log_parse_environment();
	403	log_open();
	404
7027ff61	405	test_path_decode_unit();
6c03089c	406	test_path_get_unit();
7027ff61	407	test_path_get_user_unit();
9444b1f2 LP	408	test_path_get_session();
9444b1f2 LP	409	test_path_get_owner_uid();
8b0849e9	410	test_path_get_slice();
329ac4bc	411	test_path_get_user_slice();
143bfdaf	412	TEST_REQ_RUNNING_SYSTEMD(test_get_paths());
aff38e74	413	test_proc();
143bfdaf	414	TEST_REQ_RUNNING_SYSTEMD(test_escape());
78edb35a	415	test_controller_is_valid();
a016b922	416	test_slice_to_path();
751bc6ac	417	test_shift_path();
b3a7ba89	418	TEST_REQ_RUNNING_SYSTEMD(test_mask_supported());
f0bef277 EV	419	TEST_REQ_RUNNING_SYSTEMD(test_is_cgroup_fs());
f0bef277 EV	420	TEST_REQ_RUNNING_SYSTEMD(test_fd_is_cgroup_fs());
0a05dcc0 ZJS	421	test_is_wanted_print(true);
	422	test_is_wanted_print(false); /* run twice to test caching */
	423	test_is_wanted();
073e8f09	424	test_cg_tests();
96cde13a ZJS	425
	426	return 0;
	427	}