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Systemd/src/test/test-cgroup-util.c
Lennart Poettering a016b9228f core: add new .slice unit type for partitioning systems 
In order to prepare for the kernel cgroup rework, let's introduce a new
unit type to systemd, the "slice". Slices can be arranged in a tree and
are useful to partition resources freely and hierarchally by the user.

Each service unit can now be assigned to one of these slices, and later
on login users and machines may too.

Slices translate pretty directly to the cgroup hierarchy, and the
various objects can be assigned to any of the slices in the tree.
2013-06-17 21:36:51 +02:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <assert.h>
#include "util.h"
#include "cgroup-util.h"
static void check_p_d_u(const char *path, int code, const char *result) {
_cleanup_free_ char *unit = NULL;
assert_se(cg_path_decode_unit(path, &unit) == code);
assert_se(streq_ptr(unit, result));
}
static void test_path_decode_unit(void) {
check_p_d_u("getty@.service/getty@tty2.service", 0, "getty@tty2.service");
check_p_d_u("getty@.service/getty@tty2.service/xxx", 0, "getty@tty2.service");
check_p_d_u("getty@.service/", -EINVAL, NULL);
check_p_d_u("getty@.service", -EINVAL, NULL);
check_p_d_u("getty.service", 0, "getty.service");
check_p_d_u("getty", -EINVAL, NULL);
}
static void check_p_g_u(const char *path, int code, const char *result) {
_cleanup_free_ char *unit = NULL;
assert_se(cg_path_get_unit(path, &unit) == code);
assert_se(streq_ptr(unit, result));
}
static void check_p_g_u_u(const char *path, int code, const char *result) {
_cleanup_free_ char *unit = NULL;
assert_se(cg_path_get_user_unit(path, &unit) == code);
assert_se(streq_ptr(unit, result));
}
static void test_path_get_unit(void) {
check_p_g_u("/system/foobar.service/sdfdsaf", 0, "foobar.service");
check_p_g_u("/system/getty@.service/getty@tty5.service", 0, "getty@tty5.service");
check_p_g_u("/system/getty@.service/getty@tty5.service/aaa/bbb", 0, "getty@tty5.service");
check_p_g_u("/system/getty@.service/getty@tty5.service/", 0, "getty@tty5.service");
check_p_g_u("/system/getty@tty6.service/tty5", 0, "getty@tty6.service");
check_p_g_u("sadfdsafsda", -ENOENT, NULL);
check_p_g_u("/system/getty####@tty6.service/tty5", -EINVAL, NULL);
}
static void test_path_get_user_unit(void) {
check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service", 0, "foobar.service");
check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service/waldo", 0, "foobar.service");
check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service/waldo/uuuux", 0, "foobar.service");
check_p_g_u_u("/user/lennart/2/systemd-21548/waldo/waldo/uuuux", -EINVAL, NULL);
check_p_g_u_u("/user/lennart/2/foobar.service", -ENOENT, NULL);
check_p_g_u_u("/user/lennart/2/systemd-21548/foobar@.service/foobar@pie.service/pa/po", 0, "foobar@pie.service");
}
static void test_get_paths(void) {
_cleanup_free_ char *a = NULL, *b = NULL, *c = NULL, *d = NULL;
assert_se(cg_get_root_path(&a) >= 0);
log_info("Root = %s", a);
assert_se(cg_get_system_path(&b) >= 0);
log_info("System = %s", b);
assert_se(cg_get_user_path(&c) >= 0);
log_info("User = %s", c);
assert_se(cg_get_machine_path("harley", &d) >= 0);
log_info("Machine = %s", d);
}
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, *prefix = NULL;
pid_t pid;
uid_t uid = (uid_t) -1;
if (de->d_type != DT_DIR &&
de->d_type != 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, &prefix, &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);
printf("%lu\t%s\t%s\t%s\t%lu\t%s\t%s\t%s\t%s\n",
(unsigned long) pid,
path,
prefix,
path_shifted,
(unsigned long) uid,
session,
unit,
user_unit,
machine);
}
}
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("cpu.service", "_cpu.service");
test_escape_one("tasks", "_tasks");
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", false));
assert_se(cg_controller_is_valid("foo_bar", false));
assert_se(cg_controller_is_valid("name=foo", true));
assert_se(!cg_controller_is_valid("", false));
assert_se(!cg_controller_is_valid("name=", true));
assert_se(!cg_controller_is_valid("=", false));
assert_se(!cg_controller_is_valid("cpu,cpuacct", false));
assert_se(!cg_controller_is_valid("_", false));
assert_se(!cg_controller_is_valid("_foobar", false));
assert_se(!cg_controller_is_valid("tatü", false));
}
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", 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("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);
}
int main(void) {
test_path_decode_unit();
test_path_get_unit();
test_path_get_user_unit();
test_get_paths();
test_proc();
test_escape();
test_controller_is_valid();
test_slice_to_path();
return 0;
}
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