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systemd/src/test/test-cgroup-util.c
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Zbigniew Jędrzejewski-Szmek 47350c5fb6 meson: simplify the BUILD_MODE conditional 
Using a enum is all nice and generic, but at this point it seems unlikely that
we'll add further build modes. But having an enum means that we need to include
the header file with the enumeration whenerever the conditional is used. I want
to use the conditional in log.h, which makes it hard to avoid circular imports.
2021-04-14 16:19:54 +02:00

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/* 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"
#include "util.h"
#include "version.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));
}
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, strnull(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, strnull(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, 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));
}
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, 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");
}
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;
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));
}
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(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));
}
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", "/hogehoge", "/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_cg_tests(void) {
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);
}
static void test_cg_get_keyed_attribute(void) {
_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(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(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]);
}
}
int main(void) {
test_setup_logging(LOG_DEBUG);
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_cg_tests();
test_cg_get_keyed_attribute();
return 0;
}
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