1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include <sys/types.h>
32 #include "cgroup-util.h"
37 #include "path-util.h"
39 #include "unit-name.h"
44 int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
45 _cleanup_free_ char *fs = NULL;
51 r = cg_get_path(controller, path, "cgroup.procs", &fs);
63 int cg_read_pid(FILE *f, pid_t *_pid) {
66 /* Note that the cgroup.procs might contain duplicates! See
67 * cgroups.txt for details. */
73 if (fscanf(f, "%lu", &ul) != 1) {
78 return errno ? -errno : -EIO;
88 int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d) {
89 _cleanup_free_ char *fs = NULL;
95 /* This is not recursive! */
97 r = cg_get_path(controller, path, NULL, &fs);
109 int cg_read_subgroup(DIR *d, char **fn) {
115 FOREACH_DIRENT(de, d, return -errno) {
118 if (de->d_type != DT_DIR)
121 if (streq(de->d_name, ".") ||
122 streq(de->d_name, ".."))
125 b = strdup(de->d_name);
136 int cg_rmdir(const char *controller, const char *path) {
137 _cleanup_free_ char *p = NULL;
140 r = cg_get_path(controller, path, NULL, &p);
145 if (r < 0 && errno != ENOENT)
151 int cg_kill(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, Set *s) {
152 _cleanup_set_free_ Set *allocated_set = NULL;
159 /* This goes through the tasks list and kills them all. This
160 * is repeated until no further processes are added to the
161 * tasks list, to properly handle forking processes */
164 s = allocated_set = set_new(trivial_hash_func, trivial_compare_func);
172 _cleanup_fclose_ FILE *f = NULL;
176 r = cg_enumerate_processes(controller, path, &f);
178 if (ret >= 0 && r != -ENOENT)
184 while ((r = cg_read_pid(f, &pid)) > 0) {
186 if (ignore_self && pid == my_pid)
189 if (set_get(s, LONG_TO_PTR(pid)) == LONG_TO_PTR(pid))
192 /* If we haven't killed this process yet, kill
194 if (kill(pid, sig) < 0) {
195 if (ret >= 0 && errno != ESRCH)
197 } else if (ret == 0) {
207 r = set_put(s, LONG_TO_PTR(pid));
223 /* To avoid racing against processes which fork
224 * quicker than we can kill them we repeat this until
225 * no new pids need to be killed. */
232 int cg_kill_recursive(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, bool rem, Set *s) {
233 _cleanup_set_free_ Set *allocated_set = NULL;
234 _cleanup_closedir_ DIR *d = NULL;
242 s = allocated_set = set_new(trivial_hash_func, trivial_compare_func);
247 ret = cg_kill(controller, path, sig, sigcont, ignore_self, s);
249 r = cg_enumerate_subgroups(controller, path, &d);
251 if (ret >= 0 && r != -ENOENT)
257 while ((r = cg_read_subgroup(d, &fn)) > 0) {
258 _cleanup_free_ char *p = NULL;
260 p = strjoin(path, "/", fn, NULL);
265 r = cg_kill_recursive(controller, p, sig, sigcont, ignore_self, rem, s);
266 if (ret >= 0 && r != 0)
270 if (ret >= 0 && r < 0)
274 r = cg_rmdir(controller, path);
275 if (r < 0 && ret >= 0 && r != -ENOENT && r != -EBUSY)
282 int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self) {
284 _cleanup_set_free_ Set *s = NULL;
293 s = set_new(trivial_hash_func, trivial_compare_func);
300 _cleanup_fclose_ FILE *f = NULL;
304 r = cg_enumerate_processes(cfrom, pfrom, &f);
306 if (ret >= 0 && r != -ENOENT)
312 while ((r = cg_read_pid(f, &pid)) > 0) {
314 /* This might do weird stuff if we aren't a
315 * single-threaded program. However, we
316 * luckily know we are not */
317 if (ignore_self && pid == my_pid)
320 if (set_get(s, LONG_TO_PTR(pid)) == LONG_TO_PTR(pid))
323 r = cg_attach(cto, pto, pid);
325 if (ret >= 0 && r != -ESRCH)
332 r = set_put(s, LONG_TO_PTR(pid));
352 int cg_migrate_recursive(
360 _cleanup_closedir_ DIR *d = NULL;
369 ret = cg_migrate(cfrom, pfrom, cto, pto, ignore_self);
371 r = cg_enumerate_subgroups(cfrom, pfrom, &d);
373 if (ret >= 0 && r != -ENOENT)
379 while ((r = cg_read_subgroup(d, &fn)) > 0) {
380 _cleanup_free_ char *p = NULL;
382 p = strjoin(pfrom, "/", fn, NULL);
391 r = cg_migrate_recursive(cfrom, p, cto, pto, ignore_self, rem);
392 if (r != 0 && ret >= 0)
396 if (r < 0 && ret >= 0)
400 r = cg_rmdir(cfrom, pfrom);
401 if (r < 0 && ret >= 0 && r != -ENOENT && r != -EBUSY)
408 int cg_migrate_recursive_fallback(
423 r = cg_migrate_recursive(cfrom, pfrom, cto, pto, ignore_self, rem);
425 char prefix[strlen(pto) + 1];
427 /* This didn't work? Then let's try all prefixes of the destination */
429 PATH_FOREACH_PREFIX(prefix, pto) {
430 r = cg_migrate_recursive(cfrom, pfrom, cto, prefix, ignore_self, rem);
439 static const char *normalize_controller(const char *controller) {
443 if (streq(controller, SYSTEMD_CGROUP_CONTROLLER))
445 else if (startswith(controller, "name="))
446 return controller + 5;
451 static int join_path(const char *controller, const char *path, const char *suffix, char **fs) {
454 if (!isempty(controller)) {
455 if (!isempty(path) && !isempty(suffix))
456 t = strjoin("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
457 else if (!isempty(path))
458 t = strjoin("/sys/fs/cgroup/", controller, "/", path, NULL);
459 else if (!isempty(suffix))
460 t = strjoin("/sys/fs/cgroup/", controller, "/", suffix, NULL);
462 t = strappend("/sys/fs/cgroup/", controller);
464 if (!isempty(path) && !isempty(suffix))
465 t = strjoin(path, "/", suffix, NULL);
466 else if (!isempty(path))
475 path_kill_slashes(t);
481 int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
483 static thread_local bool good = false;
487 if (controller && !cg_controller_is_valid(controller, true))
490 if (_unlikely_(!good)) {
493 r = path_is_mount_point("/sys/fs/cgroup", false);
495 return r < 0 ? r : -ENOENT;
497 /* Cache this to save a few stat()s */
501 p = controller ? normalize_controller(controller) : NULL;
503 return join_path(p, path, suffix, fs);
506 static int check_hierarchy(const char *p) {
511 /* Check if this controller actually really exists */
512 cc = alloca(sizeof("/sys/fs/cgroup/") + strlen(p));
513 strcpy(stpcpy(cc, "/sys/fs/cgroup/"), p);
514 if (access(cc, F_OK) < 0)
520 int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs) {
526 if (!cg_controller_is_valid(controller, true))
529 /* Normalize the controller syntax */
530 p = normalize_controller(controller);
532 /* Check if this controller actually really exists */
533 r = check_hierarchy(p);
537 return join_path(p, path, suffix, fs);
540 static int trim_cb(const char *path, const struct stat *sb, int typeflag, struct FTW *ftwbuf) {
545 if (typeflag != FTW_DP)
548 if (ftwbuf->level < 1)
555 int cg_trim(const char *controller, const char *path, bool delete_root) {
556 _cleanup_free_ char *fs = NULL;
561 r = cg_get_path(controller, path, NULL, &fs);
566 if (nftw(fs, trim_cb, 64, FTW_DEPTH|FTW_MOUNT|FTW_PHYS) != 0)
567 r = errno ? -errno : -EIO;
570 if (rmdir(fs) < 0 && errno != ENOENT)
577 int cg_delete(const char *controller, const char *path) {
578 _cleanup_free_ char *parent = NULL;
583 r = path_get_parent(path, &parent);
587 r = cg_migrate_recursive(controller, path, controller, parent, false, true);
588 return r == -ENOENT ? 0 : r;
591 int cg_create(const char *controller, const char *path) {
592 _cleanup_free_ char *fs = NULL;
595 r = cg_get_path_and_check(controller, path, NULL, &fs);
599 r = mkdir_parents(fs, 0755);
603 if (mkdir(fs, 0755) < 0) {
614 int cg_create_and_attach(const char *controller, const char *path, pid_t pid) {
619 r = cg_create(controller, path);
623 q = cg_attach(controller, path, pid);
627 /* This does not remove the cgroup on failure */
631 int cg_attach(const char *controller, const char *path, pid_t pid) {
632 _cleanup_free_ char *fs = NULL;
633 char c[DECIMAL_STR_MAX(pid_t) + 2];
639 r = cg_get_path_and_check(controller, path, "cgroup.procs", &fs);
646 snprintf(c, sizeof(c), "%lu\n", (unsigned long) pid);
648 return write_string_file(fs, c);
651 int cg_attach_fallback(const char *controller, const char *path, pid_t pid) {
658 r = cg_attach(controller, path, pid);
660 char prefix[strlen(path) + 1];
662 /* This didn't work? Then let's try all prefixes of
665 PATH_FOREACH_PREFIX(prefix, path) {
666 r = cg_attach(controller, prefix, pid);
675 int cg_set_group_access(
676 const char *controller,
682 _cleanup_free_ char *fs = NULL;
687 if (mode != (mode_t) -1)
690 r = cg_get_path(controller, path, NULL, &fs);
694 return chmod_and_chown(fs, mode, uid, gid);
697 int cg_set_task_access(
698 const char *controller,
704 _cleanup_free_ char *fs = NULL, *procs = NULL;
709 if (mode == (mode_t) -1 && uid == (uid_t) -1 && gid == (gid_t) -1)
712 if (mode != (mode_t) -1)
715 r = cg_get_path(controller, path, "cgroup.procs", &fs);
719 r = chmod_and_chown(fs, mode, uid, gid);
723 /* Compatibility, Always keep values for "tasks" in sync with
725 r = cg_get_path(controller, path, "tasks", &procs);
729 return chmod_and_chown(procs, mode, uid, gid);
732 int cg_pid_get_path(const char *controller, pid_t pid, char **path) {
733 _cleanup_fclose_ FILE *f = NULL;
742 if (!cg_controller_is_valid(controller, true))
745 controller = normalize_controller(controller);
747 controller = SYSTEMD_CGROUP_CONTROLLER;
750 fs = "/proc/self/cgroup";
752 fs = procfs_file_alloca(pid, "cgroup");
756 return errno == ENOENT ? -ESRCH : -errno;
758 cs = strlen(controller);
760 FOREACH_LINE(line, f, return -errno) {
768 l = strchr(line, ':');
779 FOREACH_WORD_SEPARATOR(w, k, l, ",", state) {
781 if (k == cs && memcmp(w, controller, cs) == 0) {
787 memcmp(w, "name=", 5) == 0 &&
788 memcmp(w+5, controller, cs) == 0) {
808 int cg_install_release_agent(const char *controller, const char *agent) {
809 _cleanup_free_ char *fs = NULL, *contents = NULL;
815 r = cg_get_path(controller, NULL, "release_agent", &fs);
819 r = read_one_line_file(fs, &contents);
823 sc = strstrip(contents);
825 r = write_string_file(fs, agent);
828 } else if (!streq(sc, agent))
833 r = cg_get_path(controller, NULL, "notify_on_release", &fs);
839 r = read_one_line_file(fs, &contents);
843 sc = strstrip(contents);
844 if (streq(sc, "0")) {
845 r = write_string_file(fs, "1");
858 int cg_uninstall_release_agent(const char *controller) {
859 _cleanup_free_ char *fs = NULL;
862 r = cg_get_path(controller, NULL, "notify_on_release", &fs);
866 r = write_string_file(fs, "0");
873 r = cg_get_path(controller, NULL, "release_agent", &fs);
877 r = write_string_file(fs, "");
884 int cg_is_empty(const char *controller, const char *path, bool ignore_self) {
885 _cleanup_fclose_ FILE *f = NULL;
886 pid_t pid = 0, self_pid;
892 r = cg_enumerate_processes(controller, path, &f);
894 return r == -ENOENT ? 1 : r;
898 while ((r = cg_read_pid(f, &pid)) > 0) {
900 if (ignore_self && pid == self_pid)
913 int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self) {
914 _cleanup_closedir_ DIR *d = NULL;
920 r = cg_is_empty(controller, path, ignore_self);
924 r = cg_enumerate_subgroups(controller, path, &d);
926 return r == -ENOENT ? 1 : r;
928 while ((r = cg_read_subgroup(d, &fn)) > 0) {
929 _cleanup_free_ char *p = NULL;
931 p = strjoin(path, "/", fn, NULL);
936 r = cg_is_empty_recursive(controller, p, ignore_self);
947 int cg_split_spec(const char *spec, char **controller, char **path) {
949 char *t = NULL, *u = NULL;
950 _cleanup_free_ char *v = NULL;
955 if (!path_is_safe(spec))
963 path_kill_slashes(t);
973 e = strchr(spec, ':');
975 if (!cg_controller_is_valid(spec, true))
979 t = strdup(normalize_controller(spec));
992 v = strndup(spec, e-spec);
995 t = strdup(normalize_controller(v));
998 if (!cg_controller_is_valid(t, true)) {
1003 if (streq(e+1, "")) {
1016 if (!path_is_safe(u) ||
1017 !path_is_absolute(u)) {
1023 path_kill_slashes(u);
1039 int cg_mangle_path(const char *path, char **result) {
1040 _cleanup_free_ char *c = NULL, *p = NULL;
1047 /* First check if it already is a filesystem path */
1048 if (path_startswith(path, "/sys/fs/cgroup")) {
1054 path_kill_slashes(t);
1059 /* Otherwise treat it as cg spec */
1060 r = cg_split_spec(path, &c, &p);
1064 return cg_get_path(c ? c : SYSTEMD_CGROUP_CONTROLLER, p ? p : "/", NULL, result);
1067 int cg_get_root_path(char **path) {
1073 r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 1, &p);
1077 e = endswith(p, "/" SPECIAL_SYSTEM_SLICE);
1085 int cg_shift_path(const char *cgroup, const char *root, const char **shifted) {
1086 _cleanup_free_ char *rt = NULL;
1094 /* If the root was specified let's use that, otherwise
1095 * let's determine it from PID 1 */
1097 r = cg_get_root_path(&rt);
1104 p = path_startswith(cgroup, root);
1113 int cg_pid_get_path_shifted(pid_t pid, const char *root, char **cgroup) {
1114 _cleanup_free_ char *raw = NULL;
1121 r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &raw);
1125 r = cg_shift_path(raw, root, &c);
1145 int cg_path_decode_unit(const char *cgroup, char **unit){
1151 e = strchrnul(cgroup, '/');
1152 c = strndupa(cgroup, e - cgroup);
1155 if (!unit_name_is_valid(c, TEMPLATE_INVALID))
1166 static const char *skip_slices(const char *p) {
1167 /* Skips over all slice assignments */
1172 p += strspn(p, "/");
1174 n = strcspn(p, "/");
1175 if (n <= 6 || memcmp(p + n - 6, ".slice", 6) != 0)
1182 int cg_path_get_unit(const char *path, char **unit) {
1188 e = skip_slices(path);
1190 return cg_path_decode_unit(e, unit);
1193 int cg_pid_get_unit(pid_t pid, char **unit) {
1194 _cleanup_free_ char *cgroup = NULL;
1199 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1203 return cg_path_get_unit(cgroup, unit);
1207 * Skip session-*.scope, but require it to be there.
1209 static const char *skip_session(const char *p) {
1214 p += strspn(p, "/");
1216 n = strcspn(p, "/");
1217 if (n < strlen("session-x.scope") || memcmp(p, "session-", 8) != 0 || memcmp(p + n - 6, ".scope", 6) != 0)
1221 p += strspn(p, "/");
1227 * Skip user@*.service, but require it to be there.
1229 static const char *skip_user_manager(const char *p) {
1234 p += strspn(p, "/");
1236 n = strcspn(p, "/");
1237 if (n < strlen("user@x.service") || memcmp(p, "user@", 5) != 0 || memcmp(p + n - 8, ".service", 8) != 0)
1241 p += strspn(p, "/");
1246 int cg_path_get_user_unit(const char *path, char **unit) {
1252 /* We always have to parse the path from the beginning as unit
1253 * cgroups might have arbitrary child cgroups and we shouldn't get
1254 * confused by those */
1256 /* Skip slices, if there are any */
1257 e = skip_slices(path);
1259 /* Skip the session scope... */
1260 t = skip_session(e);
1262 /* ... and skip more slices if there's one */
1265 /* ... or require a user manager unit to be there */
1266 e = skip_user_manager(e);
1271 return cg_path_decode_unit(e, unit);
1274 int cg_pid_get_user_unit(pid_t pid, char **unit) {
1275 _cleanup_free_ char *cgroup = NULL;
1280 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1284 return cg_path_get_user_unit(cgroup, unit);
1287 int cg_path_get_machine_name(const char *path, char **machine) {
1288 const char *e, *n, *x;
1295 /* Skip slices, if there are any */
1296 e = skip_slices(path);
1298 n = strchrnul(e, '/');
1302 s = strndupa(e, n - e);
1305 x = startswith(s, "machine-");
1308 if (!endswith(x, ".scope"))
1315 r = strndup(x, l - 6);
1323 int cg_pid_get_machine_name(pid_t pid, char **machine) {
1324 _cleanup_free_ char *cgroup = NULL;
1329 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1333 return cg_path_get_machine_name(cgroup, machine);
1336 int cg_path_get_session(const char *path, char **session) {
1337 const char *e, *n, *x;
1344 /* Skip slices, if there are any */
1345 e = skip_slices(path);
1347 n = strchrnul(e, '/');
1351 s = strndupa(e, n - e);
1354 x = startswith(s, "session-");
1357 if (!endswith(x, ".scope"))
1364 r = strndup(x, l - 6);
1372 int cg_pid_get_session(pid_t pid, char **session) {
1373 _cleanup_free_ char *cgroup = NULL;
1378 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1382 return cg_path_get_session(cgroup, session);
1385 int cg_path_get_owner_uid(const char *path, uid_t *uid) {
1386 _cleanup_free_ char *slice = NULL;
1387 const char *start, *end;
1394 r = cg_path_get_slice(path, &slice);
1398 start = startswith(slice, "user-");
1401 end = endswith(slice, ".slice");
1405 s = strndupa(start, end - start);
1409 if (parse_uid(s, &u) < 0)
1418 int cg_pid_get_owner_uid(pid_t pid, uid_t *uid) {
1419 _cleanup_free_ char *cgroup = NULL;
1422 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1426 return cg_path_get_owner_uid(cgroup, uid);
1429 int cg_path_get_slice(const char *p, char **slice) {
1430 const char *e = NULL;
1439 p += strspn(p, "/");
1441 n = strcspn(p, "/");
1442 if (n <= 6 || memcmp(p + n - 6, ".slice", 6) != 0) {
1463 int cg_pid_get_slice(pid_t pid, char **slice) {
1464 _cleanup_free_ char *cgroup = NULL;
1469 r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
1473 return cg_path_get_slice(cgroup, slice);
1476 char *cg_escape(const char *p) {
1477 bool need_prefix = false;
1479 /* This implements very minimal escaping for names to be used
1480 * as file names in the cgroup tree: any name which might
1481 * conflict with a kernel name or is prefixed with '_' is
1482 * prefixed with a '_'. That way, when reading cgroup names it
1483 * is sufficient to remove a single prefixing underscore if
1486 /* The return value of this function (unlike cg_unescape())
1492 streq(p, "notify_on_release") ||
1493 streq(p, "release_agent") ||
1499 dot = strrchr(p, '.');
1502 if (dot - p == 6 && memcmp(p, "cgroup", 6) == 0)
1507 n = strndupa(p, dot - p);
1509 if (check_hierarchy(n) >= 0)
1516 return strappend("_", p);
1521 char *cg_unescape(const char *p) {
1524 /* The return value of this function (unlike cg_escape())
1525 * doesn't need free()! */
1533 #define CONTROLLER_VALID \
1537 bool cg_controller_is_valid(const char *p, bool allow_named) {
1544 s = startswith(p, "name=");
1549 if (*p == 0 || *p == '_')
1552 for (t = p; *t; t++)
1553 if (!strchr(CONTROLLER_VALID, *t))
1556 if (t - p > FILENAME_MAX)
1562 int cg_slice_to_path(const char *unit, char **ret) {
1563 _cleanup_free_ char *p = NULL, *s = NULL, *e = NULL;
1569 if (!unit_name_is_valid(unit, TEMPLATE_INVALID))
1572 if (!endswith(unit, ".slice"))
1575 p = unit_name_to_prefix(unit);
1579 dash = strchr(p, '-');
1581 _cleanup_free_ char *escaped = NULL;
1582 char n[dash - p + sizeof(".slice")];
1584 strcpy(stpncpy(n, p, dash - p), ".slice");
1586 if (!unit_name_is_valid(n, TEMPLATE_INVALID))
1589 escaped = cg_escape(n);
1593 if (!strextend(&s, escaped, "/", NULL))
1596 dash = strchr(dash+1, '-');
1599 e = cg_escape(unit);
1603 if (!strextend(&s, e, NULL))
1612 int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value) {
1613 _cleanup_free_ char *p = NULL;
1616 r = cg_get_path(controller, path, attribute, &p);
1620 return write_string_file(p, value);
1623 static const char mask_names[] =
1630 int cg_create_everywhere(CGroupControllerMask supported, CGroupControllerMask mask, const char *path) {
1631 CGroupControllerMask bit = 1;
1635 /* This one will create a cgroup in our private tree, but also
1636 * duplicate it in the trees specified in mask, and remove it
1639 /* First create the cgroup in our own hierarchy. */
1640 r = cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1644 /* Then, do the same in the other hierarchies */
1645 NULSTR_FOREACH(n, mask_names) {
1648 else if (supported & bit)
1649 cg_trim(n, path, true);
1657 int cg_attach_everywhere(CGroupControllerMask supported, const char *path, pid_t pid) {
1658 CGroupControllerMask bit = 1;
1662 r = cg_attach(SYSTEMD_CGROUP_CONTROLLER, path, pid);
1666 NULSTR_FOREACH(n, mask_names) {
1667 if (supported & bit)
1668 cg_attach_fallback(n, path, pid);
1676 int cg_attach_many_everywhere(CGroupControllerMask supported, const char *path, Set* pids) {
1681 SET_FOREACH(pidp, pids, i) {
1682 pid_t pid = PTR_TO_LONG(pidp);
1685 q = cg_attach_everywhere(supported, path, pid);
1693 int cg_migrate_everywhere(CGroupControllerMask supported, const char *from, const char *to) {
1694 CGroupControllerMask bit = 1;
1698 if (!path_equal(from, to)) {
1699 r = cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER, from, SYSTEMD_CGROUP_CONTROLLER, to, false, true);
1704 NULSTR_FOREACH(n, mask_names) {
1705 if (supported & bit)
1706 cg_migrate_recursive_fallback(SYSTEMD_CGROUP_CONTROLLER, to, n, to, false, false);
1714 int cg_trim_everywhere(CGroupControllerMask supported, const char *path, bool delete_root) {
1715 CGroupControllerMask bit = 1;
1719 r = cg_trim(SYSTEMD_CGROUP_CONTROLLER, path, delete_root);
1723 NULSTR_FOREACH(n, mask_names) {
1724 if (supported & bit)
1725 cg_trim(n, path, delete_root);
1733 CGroupControllerMask cg_mask_supported(void) {
1734 CGroupControllerMask bit = 1, mask = 0;
1737 NULSTR_FOREACH(n, mask_names) {
1738 if (check_hierarchy(n) >= 0)