src/test/test-cgroup-util.c

   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
  20 #include "alloc-util.h"
  21 #include "build.h"
  22 #include "cgroup-util.h"
  23 #include "dirent-util.h"
  24 #include "fd-util.h"
  25 #include "format-util.h"
  26 #include "parse-util.h"
  27 #include "proc-cmdline.h"
  28 #include "process-util.h"
  29 #include "stat-util.h"
  30 #include "string-util.h"
  31 #include "test-helper.h"
  32 #include "user-util.h"
  33 #include "util.h"
  34
  35 static void check_p_d_u(const char *path, int code, const char *result) {
  36         _cleanup_free_ char *unit = NULL;
  37         int r;
  38
  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);
  42         assert_se(streq_ptr(unit, result));
  43 }
  44
  45 static void test_path_decode_unit(void) {
  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");
  49         check_p_d_u("getty@.service/", -ENXIO, NULL);
  50         check_p_d_u("getty@.service", -ENXIO, NULL);
  51         check_p_d_u("getty.service", 0, "getty.service");
  52         check_p_d_u("getty", -ENXIO, NULL);
  53         check_p_d_u("getty/waldo", -ENXIO, NULL);
  54         check_p_d_u("_cpu.service", 0, "cpu.service");
  55 }
  56
  57 static void check_p_g_u(const char *path, int code, const char *result) {
  58         _cleanup_free_ char *unit = NULL;
  59         int r;
  60
  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);
  64         assert_se(streq_ptr(unit, result));
  65 }
  66
  67 static void test_path_get_unit(void) {
  68         check_p_g_u("/system.slice/foobar.service/sdfdsaf", 0, "foobar.service");
  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");
  72         check_p_g_u("/system.slice/getty@tty6.service/tty5", 0, "getty@tty6.service");
  73         check_p_g_u("sadfdsafsda", -ENXIO, NULL);
  74         check_p_g_u("/system.slice/getty####@tty6.service/xxx", -ENXIO, NULL);
  75         check_p_g_u("/system.slice/system-waldo.slice/foobar.service/sdfdsaf", 0, "foobar.service");
  76         check_p_g_u("/system.slice/system-waldo.slice/_cpu.service/sdfdsaf", 0, "cpu.service");
  77         check_p_g_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "user@1000.service");
  78         check_p_g_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
  79 }
  80
  81 static void check_p_g_u_u(const char *path, int code, const char *result) {
  82         _cleanup_free_ char *unit = NULL;
  83         int r;
  84
  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);
  88         assert_se(streq_ptr(unit, result));
  89 }
  90
  91 static void test_path_get_user_unit(void) {
  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");
  96         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo/waldo/uuuux", -ENXIO, NULL);
  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");
 100         check_p_g_u_u("/meh.service", -ENXIO, NULL);
 101         check_p_g_u_u("/session-3.scope/_cpu.service", 0, "cpu.service");
 102         check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "server.service");
 103         check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/foobar.slice/foobar@pie.service", 0, "foobar@pie.service");
 104         check_p_g_u_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
 105 }
 106
 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));
 112 }
 113
 114 static void test_path_get_session(void) {
 115         check_p_g_s("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "2");
 116         check_p_g_s("/session-3.scope", 0, "3");
 117         check_p_g_s("/session-.scope", -ENXIO, NULL);
 118         check_p_g_s("", -ENXIO, NULL);
 119 }
 120
 121 static void check_p_g_o_u(const char *path, int code, uid_t result) {
 122         uid_t uid = 0;
 123
 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) {
 129         check_p_g_o_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, 1000);
 130         check_p_g_o_u("/user.slice/user-1006.slice", 0, 1006);
 131         check_p_g_o_u("", -ENXIO, 0);
 132 }
 133
 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
 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
 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);
 180 }
 181
 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) {
 191                 _cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
 192                 pid_t pid;
 193                 uid_t uid = UID_INVALID;
 194
 195                 if (!IN_SET(de->d_type, DT_DIR, DT_UNKNOWN))
 196                         continue;
 197
 198                 r = parse_pid(de->d_name, &pid);
 199                 if (r < 0)
 200                         continue;
 201
 202                 if (is_kernel_thread(pid))
 203                         continue;
 204
 205                 cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
 206                 cg_pid_get_path_shifted(pid, NULL, &path_shifted);
 207                 cg_pid_get_owner_uid(pid, &uid);
 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);
 212                 cg_pid_get_slice(pid, &slice);
 213
 214                 printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
 215                        pid,
 216                        path,
 217                        path_shifted,
 218                        uid,
 219                        session,
 220                        unit,
 221                        user_unit,
 222                        machine,
 223                        slice);
 224         }
 225 }
 226
 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");
 239         test_escape_one(".foobar", "_.foobar");
 240         test_escape_one("foobar.service", "foobar.service");
 241         test_escape_one("cgroup.service", "_cgroup.service");
 242         test_escape_one("tasks", "_tasks");
 243         if (access("/sys/fs/cgroup/cpu", F_OK) == 0)
 244                 test_escape_one("cpu.service", "_cpu.service");
 245         test_escape_one("_foobar", "__foobar");
 246         test_escape_one("", "_");
 247         test_escape_one("_", "__");
 248         test_escape_one(".", "_.");
 249 }
 250
 251 static void test_controller_is_valid(void) {
 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"));
 262 }
 263
 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);
 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);
 279         test_slice_to_path_one("-foo-.slice", NULL, -EINVAL);
 280         test_slice_to_path_one("-foo.slice", NULL, -EINVAL);
 281         test_slice_to_path_one("foo-.slice", NULL, -EINVAL);
 282         test_slice_to_path_one("foo--bar.slice", NULL, -EINVAL);
 283         test_slice_to_path_one("foo.slice/foo--bar.slice", NULL, -EINVAL);
 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
 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
 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
 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
 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
 374 int main(void) {
 375         log_set_max_level(LOG_DEBUG);
 376         log_parse_environment();
 377         log_open();
 378
 379         test_path_decode_unit();
 380         test_path_get_unit();
 381         test_path_get_user_unit();
 382         test_path_get_session();
 383         test_path_get_owner_uid();
 384         test_path_get_slice();
 385         test_path_get_user_slice();
 386         TEST_REQ_RUNNING_SYSTEMD(test_get_paths());
 387         test_proc();
 388         TEST_REQ_RUNNING_SYSTEMD(test_escape());
 389         test_controller_is_valid();
 390         test_slice_to_path();
 391         test_shift_path();
 392         TEST_REQ_RUNNING_SYSTEMD(test_mask_supported());
 393         TEST_REQ_RUNNING_SYSTEMD(test_is_cgroup_fs());
 394         TEST_REQ_RUNNING_SYSTEMD(test_fd_is_cgroup_fs());
 395         test_is_wanted_print(true);
 396         test_is_wanted_print(false); /* run twice to test caching */
 397         test_is_wanted();
 398
 399         return 0;
 400 }