src/test/test-cgroup-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "alloc-util.h"
   4 #include "build.h"
   5 #include "cgroup-util.h"
   6 #include "dirent-util.h"
   7 #include "fd-util.h"
   8 #include "format-util.h"
   9 #include "parse-util.h"
  10 #include "proc-cmdline.h"
  11 #include "process-util.h"
  12 #include "special.h"
  13 #include "stat-util.h"
  14 #include "string-util.h"
  15 #include "strv.h"
  16 #include "tests.h"
  17 #include "user-util.h"
  18 #include "util.h"
  19
  20 static void check_p_d_u(const char *path, int code, const char *result) {
  21         _cleanup_free_ char *unit = NULL;
  22         int r;
  23
  24         r = cg_path_decode_unit(path, &unit);
  25         printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
  26         assert_se(r == code);
  27         assert_se(streq_ptr(unit, result));
  28 }
  29
  30 static void test_path_decode_unit(void) {
  31         check_p_d_u("getty@tty2.service", 0, "getty@tty2.service");
  32         check_p_d_u("getty@tty2.service/", 0, "getty@tty2.service");
  33         check_p_d_u("getty@tty2.service/xxx", 0, "getty@tty2.service");
  34         check_p_d_u("getty@.service/", -ENXIO, NULL);
  35         check_p_d_u("getty@.service", -ENXIO, NULL);
  36         check_p_d_u("getty.service", 0, "getty.service");
  37         check_p_d_u("getty", -ENXIO, NULL);
  38         check_p_d_u("getty/waldo", -ENXIO, NULL);
  39         check_p_d_u("_cpu.service", 0, "cpu.service");
  40 }
  41
  42 static void check_p_g_u(const char *path, int code, const char *result) {
  43         _cleanup_free_ char *unit = NULL;
  44         int r;
  45
  46         r = cg_path_get_unit(path, &unit);
  47         printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
  48         assert_se(r == code);
  49         assert_se(streq_ptr(unit, result));
  50 }
  51
  52 static void test_path_get_unit(void) {
  53         check_p_g_u("/system.slice/foobar.service/sdfdsaf", 0, "foobar.service");
  54         check_p_g_u("/system.slice/getty@tty5.service", 0, "getty@tty5.service");
  55         check_p_g_u("/system.slice/getty@tty5.service/aaa/bbb", 0, "getty@tty5.service");
  56         check_p_g_u("/system.slice/getty@tty5.service/", 0, "getty@tty5.service");
  57         check_p_g_u("/system.slice/getty@tty6.service/tty5", 0, "getty@tty6.service");
  58         check_p_g_u("sadfdsafsda", -ENXIO, NULL);
  59         check_p_g_u("/system.slice/getty####@tty6.service/xxx", -ENXIO, NULL);
  60         check_p_g_u("/system.slice/system-waldo.slice/foobar.service/sdfdsaf", 0, "foobar.service");
  61         check_p_g_u("/system.slice/system-waldo.slice/_cpu.service/sdfdsaf", 0, "cpu.service");
  62         check_p_g_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "user@1000.service");
  63         check_p_g_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
  64 }
  65
  66 static void check_p_g_u_u(const char *path, int code, const char *result) {
  67         _cleanup_free_ char *unit = NULL;
  68         int r;
  69
  70         r = cg_path_get_user_unit(path, &unit);
  71         printf("%s: %s → %s %d expected %s %d\n", __func__, path, unit, r, result, code);
  72         assert_se(r == code);
  73         assert_se(streq_ptr(unit, result));
  74 }
  75
  76 static void test_path_get_user_unit(void) {
  77         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "foobar.service");
  78         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo.slice/foobar.service", 0, "foobar.service");
  79         check_p_g_u_u("/user.slice/user-1002.slice/session-2.scope/foobar.service/waldo", 0, "foobar.service");
  80         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar.service/waldo/uuuux", 0, "foobar.service");
  81         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/waldo/waldo/uuuux", -ENXIO, NULL);
  82         check_p_g_u_u("/user.slice/user-1000.slice/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
  83         check_p_g_u_u("/session-2.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
  84         check_p_g_u_u("/xyz.slice/xyz-waldo.slice/session-77.scope/foobar@pie.service/pa/po", 0, "foobar@pie.service");
  85         check_p_g_u_u("/meh.service", -ENXIO, NULL);
  86         check_p_g_u_u("/session-3.scope/_cpu.service", 0, "cpu.service");
  87         check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/server.service", 0, "server.service");
  88         check_p_g_u_u("/user.slice/user-1000.slice/user@1000.service/foobar.slice/foobar@pie.service", 0, "foobar@pie.service");
  89         check_p_g_u_u("/user.slice/user-1000.slice/user@.service/server.service", -ENXIO, NULL);
  90 }
  91
  92 static void check_p_g_s(const char *path, int code, const char *result) {
  93         _cleanup_free_ char *s = NULL;
  94
  95         assert_se(cg_path_get_session(path, &s) == code);
  96         assert_se(streq_ptr(s, result));
  97 }
  98
  99 static void test_path_get_session(void) {
 100         check_p_g_s("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, "2");
 101         check_p_g_s("/session-3.scope", 0, "3");
 102         check_p_g_s("/session-.scope", -ENXIO, NULL);
 103         check_p_g_s("", -ENXIO, NULL);
 104 }
 105
 106 static void check_p_g_o_u(const char *path, int code, uid_t result) {
 107         uid_t uid = 0;
 108
 109         assert_se(cg_path_get_owner_uid(path, &uid) == code);
 110         assert_se(uid == result);
 111 }
 112
 113 static void test_path_get_owner_uid(void) {
 114         check_p_g_o_u("/user.slice/user-1000.slice/session-2.scope/foobar.service", 0, 1000);
 115         check_p_g_o_u("/user.slice/user-1006.slice", 0, 1006);
 116         check_p_g_o_u("", -ENXIO, 0);
 117 }
 118
 119 static void check_p_g_slice(const char *path, int code, const char *result) {
 120         _cleanup_free_ char *s = NULL;
 121
 122         assert_se(cg_path_get_slice(path, &s) == code);
 123         assert_se(streq_ptr(s, result));
 124 }
 125
 126 static void test_path_get_slice(void) {
 127         check_p_g_slice("/user.slice", 0, "user.slice");
 128         check_p_g_slice("/foobar", 0, SPECIAL_ROOT_SLICE);
 129         check_p_g_slice("/user.slice/user-waldo.slice", 0, "user-waldo.slice");
 130         check_p_g_slice("", 0, SPECIAL_ROOT_SLICE);
 131         check_p_g_slice("foobar", 0, SPECIAL_ROOT_SLICE);
 132         check_p_g_slice("foobar.slice", 0, "foobar.slice");
 133         check_p_g_slice("foo.slice/foo-bar.slice/waldo.service", 0, "foo-bar.slice");
 134 }
 135
 136 static void check_p_g_u_slice(const char *path, int code, const char *result) {
 137         _cleanup_free_ char *s = NULL;
 138
 139         assert_se(cg_path_get_user_slice(path, &s) == code);
 140         assert_se(streq_ptr(s, result));
 141 }
 142
 143 static void test_path_get_user_slice(void) {
 144         check_p_g_u_slice("/user.slice", -ENXIO, NULL);
 145         check_p_g_u_slice("/foobar", -ENXIO, NULL);
 146         check_p_g_u_slice("/user.slice/user-waldo.slice", -ENXIO, NULL);
 147         check_p_g_u_slice("", -ENXIO, NULL);
 148         check_p_g_u_slice("foobar", -ENXIO, NULL);
 149         check_p_g_u_slice("foobar.slice", -ENXIO, NULL);
 150         check_p_g_u_slice("foo.slice/foo-bar.slice/waldo.service", -ENXIO, NULL);
 151
 152         check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service", 0, SPECIAL_ROOT_SLICE);
 153         check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/", 0, SPECIAL_ROOT_SLICE);
 154         check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service///", 0, SPECIAL_ROOT_SLICE);
 155         check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/waldo.service", 0, SPECIAL_ROOT_SLICE);
 156         check_p_g_u_slice("foo.slice/foo-bar.slice/user@1000.service/piep.slice/foo.service", 0, "piep.slice");
 157         check_p_g_u_slice("/foo.slice//foo-bar.slice/user@1000.service/piep.slice//piep-pap.slice//foo.service", 0, "piep-pap.slice");
 158 }
 159
 160 static void test_get_paths(void) {
 161         _cleanup_free_ char *a = NULL;
 162
 163         assert_se(cg_get_root_path(&a) >= 0);
 164         log_info("Root = %s", a);
 165 }
 166
 167 static void test_proc(void) {
 168         _cleanup_closedir_ DIR *d = NULL;
 169         struct dirent *de;
 170         int r;
 171
 172         d = opendir("/proc");
 173         assert_se(d);
 174
 175         FOREACH_DIRENT(de, d, break) {
 176                 _cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
 177                 pid_t pid;
 178                 uid_t uid = UID_INVALID;
 179
 180                 if (!IN_SET(de->d_type, DT_DIR, DT_UNKNOWN))
 181                         continue;
 182
 183                 r = parse_pid(de->d_name, &pid);
 184                 if (r < 0)
 185                         continue;
 186
 187                 if (is_kernel_thread(pid))
 188                         continue;
 189
 190                 cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
 191                 cg_pid_get_path_shifted(pid, NULL, &path_shifted);
 192                 cg_pid_get_owner_uid(pid, &uid);
 193                 cg_pid_get_session(pid, &session);
 194                 cg_pid_get_unit(pid, &unit);
 195                 cg_pid_get_user_unit(pid, &user_unit);
 196                 cg_pid_get_machine_name(pid, &machine);
 197                 cg_pid_get_slice(pid, &slice);
 198
 199                 printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
 200                        pid,
 201                        path,
 202                        path_shifted,
 203                        uid,
 204                        session,
 205                        unit,
 206                        user_unit,
 207                        machine,
 208                        slice);
 209         }
 210 }
 211
 212 static void test_escape_one(const char *s, const char *r) {
 213         _cleanup_free_ char *b;
 214
 215         b = cg_escape(s);
 216         assert_se(b);
 217         assert_se(streq(b, r));
 218
 219         assert_se(streq(cg_unescape(b), s));
 220 }
 221
 222 static void test_escape(void) {
 223         test_escape_one("foobar", "foobar");
 224         test_escape_one(".foobar", "_.foobar");
 225         test_escape_one("foobar.service", "foobar.service");
 226         test_escape_one("cgroup.service", "_cgroup.service");
 227         test_escape_one("tasks", "_tasks");
 228         if (access("/sys/fs/cgroup/cpu", F_OK) == 0)
 229                 test_escape_one("cpu.service", "_cpu.service");
 230         test_escape_one("_foobar", "__foobar");
 231         test_escape_one("", "_");
 232         test_escape_one("_", "__");
 233         test_escape_one(".", "_.");
 234 }
 235
 236 static void test_controller_is_valid(void) {
 237         assert_se(cg_controller_is_valid("foobar"));
 238         assert_se(cg_controller_is_valid("foo_bar"));
 239         assert_se(cg_controller_is_valid("name=foo"));
 240         assert_se(!cg_controller_is_valid(""));
 241         assert_se(!cg_controller_is_valid("name="));
 242         assert_se(!cg_controller_is_valid("="));
 243         assert_se(!cg_controller_is_valid("cpu,cpuacct"));
 244         assert_se(!cg_controller_is_valid("_"));
 245         assert_se(!cg_controller_is_valid("_foobar"));
 246         assert_se(!cg_controller_is_valid("tatü"));
 247 }
 248
 249 static void test_slice_to_path_one(const char *unit, const char *path, int error) {
 250         _cleanup_free_ char *ret = NULL;
 251         int r;
 252
 253         log_info("unit: %s", unit);
 254
 255         r = cg_slice_to_path(unit, &ret);
 256         log_info("actual: %s / %d", strnull(ret), r);
 257         log_info("expect: %s / %d", strnull(path), error);
 258         assert_se(r == error);
 259         assert_se(streq_ptr(ret, path));
 260 }
 261
 262 static void test_slice_to_path(void) {
 263         test_slice_to_path_one("foobar.slice", "foobar.slice", 0);
 264         test_slice_to_path_one("foobar-waldo.slice", "foobar.slice/foobar-waldo.slice", 0);
 265         test_slice_to_path_one("foobar-waldo.service", NULL, -EINVAL);
 266         test_slice_to_path_one(SPECIAL_ROOT_SLICE, "", 0);
 267         test_slice_to_path_one("--.slice", NULL, -EINVAL);
 268         test_slice_to_path_one("-", NULL, -EINVAL);
 269         test_slice_to_path_one("-foo-.slice", NULL, -EINVAL);
 270         test_slice_to_path_one("-foo.slice", NULL, -EINVAL);
 271         test_slice_to_path_one("foo-.slice", NULL, -EINVAL);
 272         test_slice_to_path_one("foo--bar.slice", NULL, -EINVAL);
 273         test_slice_to_path_one("foo.slice/foo--bar.slice", NULL, -EINVAL);
 274         test_slice_to_path_one("a-b.slice", "a.slice/a-b.slice", 0);
 275         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);
 276
 277         test_slice_to_path_one("foobar@.slice", NULL, -EINVAL);
 278         test_slice_to_path_one("foobar@waldo.slice", NULL, -EINVAL);
 279         test_slice_to_path_one("foobar@waldo.service", 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@-.slice", NULL, -EINVAL);
 283         test_slice_to_path_one("foo@@bar.slice", NULL, -EINVAL);
 284         test_slice_to_path_one("foo.slice/foo@@bar.slice", NULL, -EINVAL);
 285 }
 286
 287 static void test_shift_path_one(const char *raw, const char *root, const char *shifted) {
 288         const char *s = NULL;
 289
 290         assert_se(cg_shift_path(raw, root, &s) >= 0);
 291         assert_se(streq(s, shifted));
 292 }
 293
 294 static void test_shift_path(void) {
 295
 296         test_shift_path_one("/foobar/waldo", "/", "/foobar/waldo");
 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", "/hogehoge", "/foobar/waldo");
 300 }
 301
 302 static void test_mask_supported(void) {
 303
 304         CGroupMask m;
 305         CGroupController c;
 306
 307         assert_se(cg_mask_supported(&m) >= 0);
 308
 309         for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++)
 310                 printf("'%s' is supported: %s\n", cgroup_controller_to_string(c), yes_no(m & CGROUP_CONTROLLER_TO_MASK(c)));
 311 }
 312
 313 static void test_is_cgroup_fs(void) {
 314         struct statfs sfs;
 315         assert_se(statfs("/sys/fs/cgroup", &sfs) == 0);
 316         if (is_temporary_fs(&sfs))
 317                 assert_se(statfs("/sys/fs/cgroup/systemd", &sfs) == 0);
 318         assert_se(is_cgroup_fs(&sfs));
 319 }
 320
 321 static void test_fd_is_cgroup_fs(void) {
 322         int fd;
 323
 324         fd = open("/sys/fs/cgroup", O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
 325         assert_se(fd >= 0);
 326         if (fd_is_temporary_fs(fd)) {
 327                 fd = safe_close(fd);
 328                 fd = open("/sys/fs/cgroup/systemd", O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
 329                 assert_se(fd >= 0);
 330         }
 331         assert_se(fd_is_cgroup_fs(fd));
 332         fd = safe_close(fd);
 333 }
 334
 335 static void test_cg_tests(void) {
 336         int all, hybrid, systemd, r;
 337
 338         r = cg_unified();
 339         if (r == -ENOMEDIUM) {
 340                 log_notice_errno(r, "Skipping cg hierarchy tests: %m");
 341                 return;
 342         }
 343         assert_se(r >= 0);
 344
 345         all = cg_all_unified();
 346         assert_se(IN_SET(all, 0, 1));
 347
 348         hybrid = cg_hybrid_unified();
 349         assert_se(IN_SET(hybrid, 0, 1));
 350
 351         systemd = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER);
 352         assert_se(IN_SET(systemd, 0, 1));
 353
 354         if (all) {
 355                 assert_se(systemd);
 356                 assert_se(!hybrid);
 357
 358         } else if (hybrid) {
 359                 assert_se(systemd);
 360                 assert_se(!all);
 361
 362         } else
 363                 assert_se(!systemd);
 364 }
 365
 366 static void test_cg_get_keyed_attribute(void) {
 367         _cleanup_free_ char *val = NULL;
 368         char *vals3[3] = {}, *vals3a[3] = {};
 369         int i, r;
 370
 371         r = cg_get_keyed_attribute("cpu", "/init.scope", "no_such_file", STRV_MAKE("no_such_attr"), &val);
 372         if (r == -ENOMEDIUM) {
 373                 log_info_errno(r, "Skipping most of %s, /sys/fs/cgroup not accessible: %m", __func__);
 374                 return;
 375         }
 376
 377         assert_se(r == -ENOENT);
 378         assert_se(val == NULL);
 379
 380         if (access("/sys/fs/cgroup/init.scope/cpu.stat", R_OK) < 0) {
 381                 log_info_errno(errno, "Skipping most of %s, /init.scope/cpu.stat not accessible: %m", __func__);
 382                 return;
 383         }
 384
 385         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("no_such_attr"), &val) == -ENXIO);
 386         assert_se(val == NULL);
 387
 388         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec"), &val) == 0);
 389         log_info("cpu /init.scope cpu.stat [usage_usec] → \"%s\"", val);
 390
 391         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "no_such_attr"), vals3) == -ENXIO);
 392
 393         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat", STRV_MAKE("usage_usec", "usage_usec"), vals3) == -ENXIO);
 394
 395         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat",
 396                                          STRV_MAKE("usage_usec", "user_usec", "system_usec"), vals3) == 0);
 397         log_info("cpu /init.scope cpu.stat [usage_usec user_usec system_usec] → \"%s\", \"%s\", \"%s\"",
 398                  vals3[0], vals3[1], vals3[2]);
 399
 400         assert_se(cg_get_keyed_attribute("cpu", "/init.scope", "cpu.stat",
 401                                          STRV_MAKE("system_usec", "user_usec", "usage_usec"), vals3a) == 0);
 402         log_info("cpu /init.scope cpu.stat [system_usec user_usec usage_usec] → \"%s\", \"%s\", \"%s\"",
 403                  vals3a[0], vals3a[1], vals3a[2]);
 404
 405         for (i = 0; i < 3; i++) {
 406                 free(vals3[i]);
 407                 free(vals3a[i]);
 408         }
 409 }
 410
 411 int main(void) {
 412         test_setup_logging(LOG_DEBUG);
 413
 414         test_path_decode_unit();
 415         test_path_get_unit();
 416         test_path_get_user_unit();
 417         test_path_get_session();
 418         test_path_get_owner_uid();
 419         test_path_get_slice();
 420         test_path_get_user_slice();
 421         TEST_REQ_RUNNING_SYSTEMD(test_get_paths());
 422         test_proc();
 423         TEST_REQ_RUNNING_SYSTEMD(test_escape());
 424         test_controller_is_valid();
 425         test_slice_to_path();
 426         test_shift_path();
 427         TEST_REQ_RUNNING_SYSTEMD(test_mask_supported());
 428         TEST_REQ_RUNNING_SYSTEMD(test_is_cgroup_fs());
 429         TEST_REQ_RUNNING_SYSTEMD(test_fd_is_cgroup_fs());
 430         test_cg_tests();
 431         test_cg_get_keyed_attribute();
 432
 433         return 0;
 434 }