../src/basic/cgroup-util.c

Bug Summary

File:	build-scan/../src/basic/cgroup-util.c
Warning:	line 251, column 21 Although the value stored to 'allocated_set' is used in the enclosing expression, the value is never actually read from 'allocated_set'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name cgroup-util.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -menable-no-infs -menable-no-nans -menable-unsafe-fp-math -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -ffast-math -ffinite-math-only -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/12.0.0 -include config.h -I src/basic/libbasic.a.p -I src/basic -I ../src/basic -I src/shared -I ../src/shared -I src/systemd -I ../src/systemd -I src/journal -I ../src/journal -I src/journal-remote -I ../src/journal-remote -I src/nspawn -I ../src/nspawn -I src/resolve -I ../src/resolve -I src/timesync -I ../src/timesync -I ../src/time-wait-sync -I src/login -I ../src/login -I src/udev -I ../src/udev -I src/libudev -I ../src/libudev -I src/core -I ../src/core -I ../src/libsystemd/sd-bus -I ../src/libsystemd/sd-device -I ../src/libsystemd/sd-hwdb -I ../src/libsystemd/sd-id128 -I ../src/libsystemd/sd-netlink -I ../src/libsystemd/sd-network -I src/libsystemd-network -I ../src/libsystemd-network -I . -I .. -I /usr/include/blkid -I /usr/include/libmount -D _FILE_OFFSET_BITS=64 -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/12.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wwrite-strings -Wno-unused-parameter -Wno-missing-field-initializers -Wno-unused-result -Wno-format-signedness -Wno-error=nonnull -std=gnu99 -fconst-strings -fdebug-compilation-dir /home/mrc0mmand/repos/@redhat-plumbers/systemd-rhel8/build-scan -ferror-limit 19 -fvisibility default -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -analyzer-output=html -faddrsig -o /tmp/scan-build-2021-07-16-221226-1465241-1 -x c ../src/basic/cgroup-util.c

1	/* SPDX-License-Identifier: LGPL-2.1+ */
2
3	#include <dirent.h>
4	#include <errno(*__errno_location ()).h>
5	#include <ftw.h>
6	#include <limits.h>
7	#include <signal.h>
8	#include <stddef.h>
9	#include <stdio_ext.h>
10	#include <stdlib.h>
11	#include <string.h>
12	#include <sys/stat.h>
13	#include <sys/statfs.h>
14	#include <sys/types.h>
15	#include <sys/xattr.h>
16	#include <unistd.h>
17
18	#include "alloc-util.h"
19	#include "cgroup-util.h"
20	#include "def.h"
21	#include "dirent-util.h"
22	#include "extract-word.h"
23	#include "fd-util.h"
24	#include "fileio.h"
25	#include "format-util.h"
26	#include "fs-util.h"
27	#include "log.h"
28	#include "login-util.h"
29	#include "macro.h"
30	#include "missing.h"
31	#include "mkdir.h"
32	#include "parse-util.h"
33	#include "path-util.h"
34	#include "proc-cmdline.h"
35	#include "process-util.h"
36	#include "set.h"
37	#include "special.h"
38	#include "stat-util.h"
39	#include "stdio-util.h"
40	#include "string-table.h"
41	#include "string-util.h"
42	#include "strv.h"
43	#include "unit-name.h"
44	#include "user-util.h"
45
46	int cg_enumerate_processes(const char controller, const char path, FILE **_f) {
47	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
48	FILE *f;
49	int r;
50
51	assert(_f)do { if ((__builtin_expect(!!(!(_f)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("_f"), "../src/basic/cgroup-util.c", 51, __PRETTY_FUNCTION__); } while (0);
52
53	r = cg_get_path(controller, path, "cgroup.procs", &fs);
54	if (r < 0)
55	return r;
56
57	f = fopen(fs, "re");
58	if (!f)
59	return -errno(*__errno_location ());
60
61	*_f = f;
62	return 0;
63	}
64
65	int cg_read_pid(FILE f, pid_t _pid) {
66	unsigned long ul;
67
68	/* Note that the cgroup.procs might contain duplicates! See
69	* cgroups.txt for details. */
70
71	assert(f)do { if ((__builtin_expect(!!(!(f)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("f"), "../src/basic/cgroup-util.c", 71, __PRETTY_FUNCTION__ ); } while (0);
72	assert(_pid)do { if ((__builtin_expect(!!(!(_pid)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("_pid"), "../src/basic/cgroup-util.c", 72 , __PRETTY_FUNCTION__); } while (0);
73
74	errno(*__errno_location ()) = 0;
75	if (fscanf(f, "%lu", &ul) != 1) {
76
77	if (feof(f))
78	return 0;
79
80	return errno(__errno_location ()) > 0 ? -errno(__errno_location ()) : -EIO5;
81	}
82
83	if (ul <= 0)
84	return -EIO5;
85
86	*_pid = (pid_t) ul;
87	return 1;
88	}
89
90	int cg_read_event(
91	const char *controller,
92	const char *path,
93	const char *event,
94	char **val) {
95
96	_cleanup_free___attribute__((cleanup(freep))) char events = NULL((void)0), content = NULL((void)0);
97	char p, line;
98	int r;
99
100	r = cg_get_path(controller, path, "cgroup.events", &events);
101	if (r < 0)
102	return r;
103
104	r = read_full_file(events, &content, NULL((void*)0));
105	if (r < 0)
106	return r;
107
108	p = content;
109	while ((line = strsep(&p, "\n"))) {
110	char *key;
111
112	key = strsep(&line, " ");
113	if (!key \|\| !line)
114	return -EINVAL22;
115
116	if (strcmp(key, event))
117	continue;
118
119	*val = strdup(line);
120	return 0;
121	}
122
123	return -ENOENT2;
124	}
125
126	bool_Bool cg_ns_supported(void) {
127	static thread_local__thread int enabled = -1;
128
129	if (enabled >= 0)
130	return enabled;
131
132	if (access("/proc/self/ns/cgroup", F_OK0) == 0)
133	enabled = 1;
134	else
135	enabled = 0;
136
137	return enabled;
138	}
139
140	bool_Bool cg_freezer_supported(void) {
141	static thread_local__thread int supported = -1;
142
143	if (supported >= 0)
144	return supported;
145
146	supported = cg_all_unified() > 0 && access("/sys/fs/cgroup/init.scope/cgroup.freeze", F_OK0) == 0;
147
148	return supported;
149	}
150
151	int cg_enumerate_subgroups(const char controller, const char path, DIR **_d) {
152	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
153	int r;
154	DIR *d;
155
156	assert(_d)do { if ((__builtin_expect(!!(!(_d)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("_d"), "../src/basic/cgroup-util.c", 156 , __PRETTY_FUNCTION__); } while (0);
157
158	/* This is not recursive! */
159
160	r = cg_get_path(controller, path, NULL((void*)0), &fs);
161	if (r < 0)
162	return r;
163
164	d = opendir(fs);
165	if (!d)
166	return -errno(*__errno_location ());
167
168	*_d = d;
169	return 0;
170	}
171
172	int cg_read_subgroup(DIR d, char *fn) {
173	struct dirent *de;
174
175	assert(d)do { if ((__builtin_expect(!!(!(d)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("d"), "../src/basic/cgroup-util.c", 175, __PRETTY_FUNCTION__); } while (0);
176	assert(fn)do { if ((__builtin_expect(!!(!(fn)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fn"), "../src/basic/cgroup-util.c", 176 , __PRETTY_FUNCTION__); } while (0);
177
178	FOREACH_DIRENT_ALL(de, d, return -errno)for ((__errno_location ()) = 0, de = readdir(d);; (__errno_location ()) = 0, de = readdir(d)) if (!de) { if ((__errno_location ( )) > 0) { return -(__errno_location ()); } break; } else {
179	char *b;
180
181	if (de->d_type != DT_DIRDT_DIR)
182	continue;
183
184	if (dot_or_dot_dot(de->d_name))
185	continue;
186
187	b = strdup(de->d_name);
188	if (!b)
189	return -ENOMEM12;
190
191	*fn = b;
192	return 1;
193	}
194
195	return 0;
196	}
197
198	int cg_rmdir(const char controller, const char path) {
199	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
200	int r;
201
202	r = cg_get_path(controller, path, NULL((void*)0), &p);
203	if (r < 0)
204	return r;
205
206	r = rmdir(p);
207	if (r < 0 && errno(*__errno_location ()) != ENOENT2)
208	return -errno(*__errno_location ());
209
210	r = cg_hybrid_unified();
211	if (r < 0)
212	return r;
213	if (r == 0)
214	return 0;
215
216	if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
217	r = cg_rmdir(SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd", path);
218	if (r < 0)
219	log_warning_errno(r, "Failed to remove compat systemd cgroup %s: %m", path)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 219, __func__, "Failed to remove compat systemd cgroup %s: %m" , path) : -abs(_e); });
220	}
221
222	return 0;
223	}
224
225	int cg_kill(
226	const char *controller,
227	const char *path,
228	int sig,
229	CGroupFlags flags,
230	Set *s,
231	cg_kill_log_func_t log_kill,
232	void *userdata) {
233
234	_cleanup_set_free___attribute__((cleanup(set_freep))) Set allocated_set = NULL((void)0);
235	bool_Bool done = false0;
236	int r, ret = 0;
237	pid_t my_pid;
238
239	assert(sig >= 0)do { if ((__builtin_expect(!!(!(sig >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("sig >= 0"), "../src/basic/cgroup-util.c" , 239, __PRETTY_FUNCTION__); } while (0);
240
241	/* Don't send SIGCONT twice. Also, SIGKILL always works even when process is suspended, hence don't send
242	* SIGCONT on SIGKILL. */
243	if (IN_SET(sig, SIGCONT, SIGKILL)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){18, 9})/sizeof(int)]; switch(sig) { case 18: case 9: _found = 1; break; default: break; } _found; }))
244	flags &= ~CGROUP_SIGCONT;
245
246	/* This goes through the tasks list and kills them all. This
247	* is repeated until no further processes are added to the
248	* tasks list, to properly handle forking processes */
249
250	if (!s) {
251	s = allocated_set = set_new(NULL)internal_set_new(((void*)0) );
	Although the value stored to 'allocated_set' is used in the enclosing expression, the value is never actually read from 'allocated_set'
252	if (!s)
253	return -ENOMEM12;
254	}
255
256	my_pid = getpid_cached();
257
258	do {
259	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
260	pid_t pid = 0;
261	done = true1;
262
263	r = cg_enumerate_processes(controller, path, &f);
264	if (r < 0) {
265	if (ret >= 0 && r != -ENOENT2)
266	return r;
267
268	return ret;
269	}
270
271	while ((r = cg_read_pid(f, &pid)) > 0) {
272
273	if ((flags & CGROUP_IGNORE_SELF) && pid == my_pid)
274	continue;
275
276	if (set_get(s, PID_TO_PTR(pid)) == PID_TO_PTR(pid))
277	continue;
278
279	if (log_kill)
280	log_kill(pid, sig, userdata);
281
282	/* If we haven't killed this process yet, kill
283	* it */
284	if (kill(pid, sig) < 0) {
285	if (ret >= 0 && errno(*__errno_location ()) != ESRCH3)
286	ret = -errno(*__errno_location ());
287	} else {
288	if (flags & CGROUP_SIGCONT)
289	(void) kill(pid, SIGCONT18);
290
291	if (ret == 0)
292	ret = 1;
293	}
294
295	done = false0;
296
297	r = set_put(s, PID_TO_PTR(pid));
298	if (r < 0) {
299	if (ret >= 0)
300	return r;
301
302	return ret;
303	}
304	}
305
306	if (r < 0) {
307	if (ret >= 0)
308	return r;
309
310	return ret;
311	}
312
313	/* To avoid racing against processes which fork
314	* quicker than we can kill them we repeat this until
315	* no new pids need to be killed. */
316
317	} while (!done);
318
319	return ret;
320	}
321
322	int cg_kill_recursive(
323	const char *controller,
324	const char *path,
325	int sig,
326	CGroupFlags flags,
327	Set *s,
328	cg_kill_log_func_t log_kill,
329	void *userdata) {
330
331	_cleanup_set_free___attribute__((cleanup(set_freep))) Set allocated_set = NULL((void)0);
332	_cleanup_closedir___attribute__((cleanup(closedirp))) DIR d = NULL((void)0);
333	int r, ret;
334	char *fn;
335
336	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 336 , __PRETTY_FUNCTION__); } while (0);
337	assert(sig >= 0)do { if ((__builtin_expect(!!(!(sig >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("sig >= 0"), "../src/basic/cgroup-util.c" , 337, __PRETTY_FUNCTION__); } while (0);
338
339	if (!s) {
340	s = allocated_set = set_new(NULL)internal_set_new(((void*)0) );
341	if (!s)
342	return -ENOMEM12;
343	}
344
345	ret = cg_kill(controller, path, sig, flags, s, log_kill, userdata);
346
347	r = cg_enumerate_subgroups(controller, path, &d);
348	if (r < 0) {
349	if (ret >= 0 && r != -ENOENT2)
350	return r;
351
352	return ret;
353	}
354
355	while ((r = cg_read_subgroup(d, &fn)) > 0) {
356	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
357
358	p = strjoin(path, "/", fn)strjoin_real((path), "/", fn, ((void*)0));
359	free(fn);
360	if (!p)
361	return -ENOMEM12;
362
363	r = cg_kill_recursive(controller, p, sig, flags, s, log_kill, userdata);
364	if (r != 0 && ret >= 0)
365	ret = r;
366	}
367	if (ret >= 0 && r < 0)
368	ret = r;
369
370	if (flags & CGROUP_REMOVE) {
371	r = cg_rmdir(controller, path);
372	if (r < 0 && ret >= 0 && !IN_SET(r, -ENOENT, -EBUSY)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){-2, -16})/sizeof(int)]; switch(r) { case -2: case -16: _found = 1; break; default: break; } _found; } ))
373	return r;
374	}
375
376	return ret;
377	}
378
379	int cg_migrate(
380	const char *cfrom,
381	const char *pfrom,
382	const char *cto,
383	const char *pto,
384	CGroupFlags flags) {
385
386	bool_Bool done = false0;
387	_cleanup_set_free___attribute__((cleanup(set_freep))) Set s = NULL((void)0);
388	int r, ret = 0;
389	pid_t my_pid;
390
391	assert(cfrom)do { if ((__builtin_expect(!!(!(cfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cfrom"), "../src/basic/cgroup-util.c", 391 , __PRETTY_FUNCTION__); } while (0);
392	assert(pfrom)do { if ((__builtin_expect(!!(!(pfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pfrom"), "../src/basic/cgroup-util.c", 392 , __PRETTY_FUNCTION__); } while (0);
393	assert(cto)do { if ((__builtin_expect(!!(!(cto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cto"), "../src/basic/cgroup-util.c", 393 , __PRETTY_FUNCTION__); } while (0);
394	assert(pto)do { if ((__builtin_expect(!!(!(pto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pto"), "../src/basic/cgroup-util.c", 394 , __PRETTY_FUNCTION__); } while (0);
395
396	s = set_new(NULL)internal_set_new(((void*)0) );
397	if (!s)
398	return -ENOMEM12;
399
400	my_pid = getpid_cached();
401
402	do {
403	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
404	pid_t pid = 0;
405	done = true1;
406
407	r = cg_enumerate_processes(cfrom, pfrom, &f);
408	if (r < 0) {
409	if (ret >= 0 && r != -ENOENT2)
410	return r;
411
412	return ret;
413	}
414
415	while ((r = cg_read_pid(f, &pid)) > 0) {
416
417	/* This might do weird stuff if we aren't a
418	* single-threaded program. However, we
419	* luckily know we are not */
420	if ((flags & CGROUP_IGNORE_SELF) && pid == my_pid)
421	continue;
422
423	if (set_get(s, PID_TO_PTR(pid)) == PID_TO_PTR(pid))
424	continue;
425
426	/* Ignore kernel threads. Since they can only
427	* exist in the root cgroup, we only check for
428	* them there. */
429	if (cfrom &&
430	empty_or_root(pfrom) &&
431	is_kernel_thread(pid) > 0)
432	continue;
433
434	r = cg_attach(cto, pto, pid);
435	if (r < 0) {
436	if (ret >= 0 && r != -ESRCH3)
437	ret = r;
438	} else if (ret == 0)
439	ret = 1;
440
441	done = false0;
442
443	r = set_put(s, PID_TO_PTR(pid));
444	if (r < 0) {
445	if (ret >= 0)
446	return r;
447
448	return ret;
449	}
450	}
451
452	if (r < 0) {
453	if (ret >= 0)
454	return r;
455
456	return ret;
457	}
458	} while (!done);
459
460	return ret;
461	}
462
463	int cg_migrate_recursive(
464	const char *cfrom,
465	const char *pfrom,
466	const char *cto,
467	const char *pto,
468	CGroupFlags flags) {
469
470	_cleanup_closedir___attribute__((cleanup(closedirp))) DIR d = NULL((void)0);
471	int r, ret = 0;
472	char *fn;
473
474	assert(cfrom)do { if ((__builtin_expect(!!(!(cfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cfrom"), "../src/basic/cgroup-util.c", 474 , __PRETTY_FUNCTION__); } while (0);
475	assert(pfrom)do { if ((__builtin_expect(!!(!(pfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pfrom"), "../src/basic/cgroup-util.c", 475 , __PRETTY_FUNCTION__); } while (0);
476	assert(cto)do { if ((__builtin_expect(!!(!(cto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cto"), "../src/basic/cgroup-util.c", 476 , __PRETTY_FUNCTION__); } while (0);
477	assert(pto)do { if ((__builtin_expect(!!(!(pto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pto"), "../src/basic/cgroup-util.c", 477 , __PRETTY_FUNCTION__); } while (0);
478
479	ret = cg_migrate(cfrom, pfrom, cto, pto, flags);
480
481	r = cg_enumerate_subgroups(cfrom, pfrom, &d);
482	if (r < 0) {
483	if (ret >= 0 && r != -ENOENT2)
484	return r;
485
486	return ret;
487	}
488
489	while ((r = cg_read_subgroup(d, &fn)) > 0) {
490	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
491
492	p = strjoin(pfrom, "/", fn)strjoin_real((pfrom), "/", fn, ((void*)0));
493	free(fn);
494	if (!p)
495	return -ENOMEM12;
496
497	r = cg_migrate_recursive(cfrom, p, cto, pto, flags);
498	if (r != 0 && ret >= 0)
499	ret = r;
500	}
501
502	if (r < 0 && ret >= 0)
503	ret = r;
504
505	if (flags & CGROUP_REMOVE) {
506	r = cg_rmdir(cfrom, pfrom);
507	if (r < 0 && ret >= 0 && !IN_SET(r, -ENOENT, -EBUSY)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){-2, -16})/sizeof(int)]; switch(r) { case -2: case -16: _found = 1; break; default: break; } _found; } ))
508	return r;
509	}
510
511	return ret;
512	}
513
514	int cg_migrate_recursive_fallback(
515	const char *cfrom,
516	const char *pfrom,
517	const char *cto,
518	const char *pto,
519	CGroupFlags flags) {
520
521	int r;
522
523	assert(cfrom)do { if ((__builtin_expect(!!(!(cfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cfrom"), "../src/basic/cgroup-util.c", 523 , __PRETTY_FUNCTION__); } while (0);
524	assert(pfrom)do { if ((__builtin_expect(!!(!(pfrom)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pfrom"), "../src/basic/cgroup-util.c", 524 , __PRETTY_FUNCTION__); } while (0);
525	assert(cto)do { if ((__builtin_expect(!!(!(cto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cto"), "../src/basic/cgroup-util.c", 525 , __PRETTY_FUNCTION__); } while (0);
526	assert(pto)do { if ((__builtin_expect(!!(!(pto)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pto"), "../src/basic/cgroup-util.c", 526 , __PRETTY_FUNCTION__); } while (0);
527
528	r = cg_migrate_recursive(cfrom, pfrom, cto, pto, flags);
529	if (r < 0) {
530	char prefix[strlen(pto) + 1];
531
532	/* This didn't work? Then let's try all prefixes of the destination */
533
534	PATH_FOREACH_PREFIX(prefix, pto)for (char _slash = ({ path_simplify(strcpy(prefix, pto), 0); (strcmp((prefix),("/")) == 0) ? ((void)0) : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), 1); _slash = strrchr ((prefix), '/')) {
535	int q;
536
537	q = cg_migrate_recursive(cfrom, pfrom, cto, prefix, flags);
538	if (q >= 0)
539	return q;
540	}
541	}
542
543	return r;
544	}
545
546	static const char controller_to_dirname(const char controller) {
547	const char *e;
548
549	assert(controller)do { if ((__builtin_expect(!!(!(controller)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("controller"), "../src/basic/cgroup-util.c" , 549, __PRETTY_FUNCTION__); } while (0);
550
551	/* Converts a controller name to the directory name below
552	* /sys/fs/cgroup/ we want to mount it to. Effectively, this
553	* just cuts off the name= prefixed used for named
554	* hierarchies, if it is specified. */
555
556	if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
557	if (cg_hybrid_unified() > 0)
558	controller = SYSTEMD_CGROUP_CONTROLLER_HYBRID"name=unified";
559	else
560	controller = SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd";
561	}
562
563	e = startswith(controller, "name=");
564	if (e)
565	return e;
566
567	return controller;
568	}
569
570	static int join_path_legacy(const char controller, const char path, const char suffix, char *fs) {
571	const char *dn;
572	char t = NULL((void)0);
573
574	assert(fs)do { if ((__builtin_expect(!!(!(fs)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fs"), "../src/basic/cgroup-util.c", 574 , __PRETTY_FUNCTION__); } while (0);
575	assert(controller)do { if ((__builtin_expect(!!(!(controller)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("controller"), "../src/basic/cgroup-util.c" , 575, __PRETTY_FUNCTION__); } while (0);
576
577	dn = controller_to_dirname(controller);
578
579	if (isempty(path) && isempty(suffix))
580	t = strappend("/sys/fs/cgroup/", dn);
581	else if (isempty(path))
582	t = strjoin("/sys/fs/cgroup/", dn, "/", suffix)strjoin_real(("/sys/fs/cgroup/"), dn, "/", suffix, ((void*)0) );
583	else if (isempty(suffix))
584	t = strjoin("/sys/fs/cgroup/", dn, "/", path)strjoin_real(("/sys/fs/cgroup/"), dn, "/", path, ((void*)0));
585	else
586	t = strjoin("/sys/fs/cgroup/", dn, "/", path, "/", suffix)strjoin_real(("/sys/fs/cgroup/"), dn, "/", path, "/", suffix, ((void*)0));
587	if (!t)
588	return -ENOMEM12;
589
590	*fs = t;
591	return 0;
592	}
593
594	static int join_path_unified(const char path, const char suffix, char **fs) {
595	char *t;
596
597	assert(fs)do { if ((__builtin_expect(!!(!(fs)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fs"), "../src/basic/cgroup-util.c", 597 , __PRETTY_FUNCTION__); } while (0);
598
599	if (isempty(path) && isempty(suffix))
600	t = strdup("/sys/fs/cgroup");
601	else if (isempty(path))
602	t = strappend("/sys/fs/cgroup/", suffix);
603	else if (isempty(suffix))
604	t = strappend("/sys/fs/cgroup/", path);
605	else
606	t = strjoin("/sys/fs/cgroup/", path, "/", suffix)strjoin_real(("/sys/fs/cgroup/"), path, "/", suffix, ((void*) 0));
607	if (!t)
608	return -ENOMEM12;
609
610	*fs = t;
611	return 0;
612	}
613
614	int cg_get_path(const char controller, const char path, const char suffix, char *fs) {
615	int r;
616
617	assert(fs)do { if ((__builtin_expect(!!(!(fs)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fs"), "../src/basic/cgroup-util.c", 617 , __PRETTY_FUNCTION__); } while (0);
618
619	if (!controller) {
620	char *t;
621
622	/* If no controller is specified, we return the path
623	* below the controllers, without any prefix. */
624
625	if (!path && !suffix)
626	return -EINVAL22;
627
628	if (!suffix)
629	t = strdup(path);
630	else if (!path)
631	t = strdup(suffix);
632	else
633	t = strjoin(path, "/", suffix)strjoin_real((path), "/", suffix, ((void*)0));
634	if (!t)
635	return -ENOMEM12;
636
637	*fs = path_simplify(t, false0);
638	return 0;
639	}
640
641	if (!cg_controller_is_valid(controller))
642	return -EINVAL22;
643
644	r = cg_all_unified();
645	if (r < 0)
646	return r;
647	if (r > 0)
648	r = join_path_unified(path, suffix, fs);
649	else
650	r = join_path_legacy(controller, path, suffix, fs);
651	if (r < 0)
652	return r;
653
654	path_simplify(*fs, false0);
655	return 0;
656	}
657
658	static int controller_is_accessible(const char *controller) {
659	int r;
660
661	assert(controller)do { if ((__builtin_expect(!!(!(controller)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("controller"), "../src/basic/cgroup-util.c" , 661, __PRETTY_FUNCTION__); } while (0);
662
663	/* Checks whether a specific controller is accessible,
664	* i.e. its hierarchy mounted. In the unified hierarchy all
665	* controllers are considered accessible, except for the named
666	* hierarchies */
667
668	if (!cg_controller_is_valid(controller))
669	return -EINVAL22;
670
671	r = cg_all_unified();
672	if (r < 0)
673	return r;
674	if (r > 0) {
675	/* We don't support named hierarchies if we are using
676	* the unified hierarchy. */
677
678	if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0))
679	return 0;
680
681	if (startswith(controller, "name="))
682	return -EOPNOTSUPP95;
683
684	} else {
685	const char cc, dn;
686
687	dn = controller_to_dirname(controller);
688	cc = strjoina("/sys/fs/cgroup/", dn)({ const char _appendees_[] = { "/sys/fs/cgroup/", dn }; char _d_, _p_; size_t _len_ = 0; size_t _i_; for (_i_ = 0; _i_ < __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(_appendees_), typeof(&(_appendees_))), sizeof(_appendees_ )/sizeof((_appendees_)[0]), ((void)0))) && _appendees_ [_i_]; _i_++) _len_ += strlen(_appendees_[_i_]); _p_ = _d_ = __builtin_alloca (_len_ + 1); for (_i_ = 0; _i_ < __extension__ (__builtin_choose_expr ( !__builtin_types_compatible_p(typeof(_appendees_), typeof(& (_appendees_))), sizeof(_appendees_)/sizeof((_appendees_)[0] ), ((void)0))) && _appendees_[_i_]; _i_++) _p_ = stpcpy (_p_, _appendees_[_i_]); _p_ = 0; _d_; });
689
690	if (laccess(cc, F_OK)faccessat(-100, (cc), (0), 0x100) < 0)
691	return -errno(*__errno_location ());
692	}
693
694	return 0;
695	}
696
697	int cg_get_path_and_check(const char controller, const char path, const char suffix, char *fs) {
698	int r;
699
700	assert(controller)do { if ((__builtin_expect(!!(!(controller)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("controller"), "../src/basic/cgroup-util.c" , 700, __PRETTY_FUNCTION__); } while (0);
701	assert(fs)do { if ((__builtin_expect(!!(!(fs)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fs"), "../src/basic/cgroup-util.c", 701 , __PRETTY_FUNCTION__); } while (0);
702
703	/* Check if the specified controller is actually accessible */
704	r = controller_is_accessible(controller);
705	if (r < 0)
706	return r;
707
708	return cg_get_path(controller, path, suffix, fs);
709	}
710
711	static int trim_cb(const char path, const struct stat sb, int typeflag, struct FTW *ftwbuf) {
712	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 712 , __PRETTY_FUNCTION__); } while (0);
713	assert(sb)do { if ((__builtin_expect(!!(!(sb)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("sb"), "../src/basic/cgroup-util.c", 713 , __PRETTY_FUNCTION__); } while (0);
714	assert(ftwbuf)do { if ((__builtin_expect(!!(!(ftwbuf)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ftwbuf"), "../src/basic/cgroup-util.c", 714, __PRETTY_FUNCTION__); } while (0);
715
716	if (typeflag != FTW_DPFTW_DP)
717	return 0;
718
719	if (ftwbuf->level < 1)
720	return 0;
721
722	(void) rmdir(path);
723	return 0;
724	}
725
726	int cg_trim(const char controller, const char path, bool_Bool delete_root) {
727	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
728	int r = 0, q;
729
730	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 730 , __PRETTY_FUNCTION__); } while (0);
731
732	r = cg_get_path(controller, path, NULL((void*)0), &fs);
733	if (r < 0)
734	return r;
735
736	errno(*__errno_location ()) = 0;
737	if (nftw(fs, trim_cb, 64, FTW_DEPTHFTW_DEPTH\|FTW_MOUNTFTW_MOUNT\|FTW_PHYSFTW_PHYS) != 0) {
738	if (errno(*__errno_location ()) == ENOENT2)
739	r = 0;
740	else if (errno(*__errno_location ()) > 0)
741	r = -errno(*__errno_location ());
742	else
743	r = -EIO5;
744	}
745
746	if (delete_root) {
747	if (rmdir(fs) < 0 && errno(*__errno_location ()) != ENOENT2)
748	return -errno(*__errno_location ());
749	}
750
751	q = cg_hybrid_unified();
752	if (q < 0)
753	return q;
754	if (q > 0 && streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
755	q = cg_trim(SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd", path, delete_root);
756	if (q < 0)
757	log_warning_errno(q, "Failed to trim compat systemd cgroup %s: %m", path)({ int _level = ((4)), _e = ((q)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 757, __func__, "Failed to trim compat systemd cgroup %s: %m" , path) : -abs(_e); });
758	}
759
760	return r;
761	}
762
763	/* Create a cgroup in the hierarchy of controller.
764	* Returns 0 if the group already existed, 1 on success, negative otherwise.
765	*/
766	int cg_create(const char controller, const char path) {
767	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
768	int r;
769
770	r = cg_get_path_and_check(controller, path, NULL((void*)0), &fs);
771	if (r < 0)
772	return r;
773
774	r = mkdir_parents(fs, 0755);
775	if (r < 0)
776	return r;
777
778	r = mkdir_errno_wrapper(fs, 0755);
779	if (r == -EEXIST17)
780	return 0;
781	if (r < 0)
782	return r;
783
784	r = cg_hybrid_unified();
785	if (r < 0)
786	return r;
787
788	if (r > 0 && streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
789	r = cg_create(SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd", path);
790	if (r < 0)
791	log_warning_errno(r, "Failed to create compat systemd cgroup %s: %m", path)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 791, __func__, "Failed to create compat systemd cgroup %s: %m" , path) : -abs(_e); });
792	}
793
794	return 1;
795	}
796
797	int cg_create_and_attach(const char controller, const char path, pid_t pid) {
798	int r, q;
799
800	assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/cgroup-util.c" , 800, __PRETTY_FUNCTION__); } while (0);
801
802	r = cg_create(controller, path);
803	if (r < 0)
804	return r;
805
806	q = cg_attach(controller, path, pid);
807	if (q < 0)
808	return q;
809
810	/* This does not remove the cgroup on failure */
811	return r;
812	}
813
814	int cg_attach(const char controller, const char path, pid_t pid) {
815	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
816	char c[DECIMAL_STR_MAX(pid_t)(2+(sizeof(pid_t) <= 1 ? 3 : sizeof(pid_t) <= 2 ? 5 : sizeof (pid_t) <= 4 ? 10 : sizeof(pid_t) <= 8 ? 20 : sizeof(int [-2*(sizeof(pid_t) > 8)]))) + 2];
817	int r;
818
819	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 819 , __PRETTY_FUNCTION__); } while (0);
820	assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/cgroup-util.c" , 820, __PRETTY_FUNCTION__); } while (0);
821
822	r = cg_get_path_and_check(controller, path, "cgroup.procs", &fs);
823	if (r < 0)
824	return r;
825
826	if (pid == 0)
827	pid = getpid_cached();
828
829	xsprintf(c, PID_FMT "\n", pid)do { if ((__builtin_expect(!!(!(((size_t) snprintf(c, __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p(typeof (c), typeof(&(c))), sizeof(c)/sizeof((c)[0]), ((void)0)) ), "%" "i" "\n", pid) < (__extension__ (__builtin_choose_expr ( !__builtin_types_compatible_p(typeof(c), typeof(&(c))) , sizeof(c)/sizeof((c)[0]), ((void)0))))))),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("xsprintf: " "c" "[] must be big enough" ), "../src/basic/cgroup-util.c", 829, __PRETTY_FUNCTION__); } while (0);
830
831	r = write_string_file(fs, c, 0);
832	if (r < 0)
833	return r;
834
835	r = cg_hybrid_unified();
836	if (r < 0)
837	return r;
838
839	if (r > 0 && streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
840	r = cg_attach(SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd", path, pid);
841	if (r < 0)
842	log_warning_errno(r, "Failed to attach "PID_FMT" to compat systemd cgroup %s: %m", pid, path)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 842, __func__, "Failed to attach " "%" "i"" to compat systemd cgroup %s: %m", pid, path) : -abs( _e); });
843	}
844
845	return 0;
846	}
847
848	int cg_attach_fallback(const char controller, const char path, pid_t pid) {
849	int r;
850
851	assert(controller)do { if ((__builtin_expect(!!(!(controller)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("controller"), "../src/basic/cgroup-util.c" , 851, __PRETTY_FUNCTION__); } while (0);
852	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 852 , __PRETTY_FUNCTION__); } while (0);
853	assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/cgroup-util.c" , 853, __PRETTY_FUNCTION__); } while (0);
854
855	r = cg_attach(controller, path, pid);
856	if (r < 0) {
857	char prefix[strlen(path) + 1];
858
859	/* This didn't work? Then let's try all prefixes of
860	* the destination */
861
862	PATH_FOREACH_PREFIX(prefix, path)for (char _slash = ({ path_simplify(strcpy(prefix, path), 0) ; (strcmp((prefix),("/")) == 0) ? ((void)0) : strrchr(prefix , '/'); }); _slash && ((*_slash = 0), 1); _slash = strrchr ((prefix), '/')) {
863	int q;
864
865	q = cg_attach(controller, prefix, pid);
866	if (q >= 0)
867	return q;
868	}
869	}
870
871	return r;
872	}
873
874	int cg_set_access(
875	const char *controller,
876	const char *path,
877	uid_t uid,
878	gid_t gid) {
879
880	struct Attribute {
881	const char *name;
882	bool_Bool fatal;
883	};
884
885	/* cgroupsv1, aka legacy/non-unified */
886	static const struct Attribute legacy_attributes[] = {
887	{ "cgroup.procs", true1 },
888	{ "tasks", false0 },
889	{ "cgroup.clone_children", false0 },
890	{},
891	};
892
893	/* cgroupsv2, aka unified */
894	static const struct Attribute unified_attributes[] = {
895	{ "cgroup.procs", true1 },
896	{ "cgroup.subtree_control", true1 },
897	{ "cgroup.threads", false0 },
898	{},
899	};
900
901	static const struct Attribute* const attributes[] = {
902	[false0] = legacy_attributes,
903	[true1] = unified_attributes,
904	};
905
906	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
907	const struct Attribute *i;
908	int r, unified;
909
910	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 910 , __PRETTY_FUNCTION__); } while (0);
911
912	if (uid == UID_INVALID((uid_t) -1) && gid == GID_INVALID((gid_t) -1))
913	return 0;
914
915	unified = cg_unified_controller(controller);
916	if (unified < 0)
917	return unified;
918
919	/* Configure access to the cgroup itself */
920	r = cg_get_path(controller, path, NULL((void*)0), &fs);
921	if (r < 0)
922	return r;
923
924	r = chmod_and_chown(fs, 0755, uid, gid);
925	if (r < 0)
926	return r;
927
928	/* Configure access to the cgroup's attributes */
929	for (i = attributes[unified]; i->name; i++) {
930	fs = mfree(fs);
931
932	r = cg_get_path(controller, path, i->name, &fs);
933	if (r < 0)
934	return r;
935
936	r = chmod_and_chown(fs, 0644, uid, gid);
937	if (r < 0) {
938	if (i->fatal)
939	return r;
940
941	log_debug_errno(r, "Failed to set access on cgroup %s, ignoring: %m", fs)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 941, __func__, "Failed to set access on cgroup %s, ignoring: %m" , fs) : -abs(_e); });
942	}
943	}
944
945	if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0)) {
946	r = cg_hybrid_unified();
947	if (r < 0)
948	return r;
949	if (r > 0) {
950	/* Always propagate access mode from unified to legacy controller */
951	r = cg_set_access(SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd", path, uid, gid);
952	if (r < 0)
953	log_debug_errno(r, "Failed to set access on compatibility systemd cgroup %s, ignoring: %m", path)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 953, __func__, "Failed to set access on compatibility systemd cgroup %s, ignoring: %m" , path) : -abs(_e); });
954	}
955	}
956
957	return 0;
958	}
959
960	int cg_set_xattr(const char controller, const char path, const char name, const void value, size_t size, int flags) {
961	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
962	int r;
963
964	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 964 , __PRETTY_FUNCTION__); } while (0);
965	assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("name"), "../src/basic/cgroup-util.c", 965 , __PRETTY_FUNCTION__); } while (0);
966	assert(value \|\| size <= 0)do { if ((__builtin_expect(!!(!(value \|\| size <= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("value \|\| size <= 0"), "../src/basic/cgroup-util.c" , 966, __PRETTY_FUNCTION__); } while (0);
967
968	r = cg_get_path(controller, path, NULL((void*)0), &fs);
969	if (r < 0)
970	return r;
971
972	if (setxattr(fs, name, value, size, flags) < 0)
973	return -errno(*__errno_location ());
974
975	return 0;
976	}
977
978	int cg_get_xattr(const char controller, const char path, const char name, void value, size_t size) {
979	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
980	ssize_t n;
981	int r;
982
983	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 983 , __PRETTY_FUNCTION__); } while (0);
984	assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("name"), "../src/basic/cgroup-util.c", 984 , __PRETTY_FUNCTION__); } while (0);
985
986	r = cg_get_path(controller, path, NULL((void*)0), &fs);
987	if (r < 0)
988	return r;
989
990	n = getxattr(fs, name, value, size);
991	if (n < 0)
992	return -errno(*__errno_location ());
993
994	return (int) n;
995	}
996
997	int cg_pid_get_path(const char controller, pid_t pid, char *path) {
998	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
999	char line[LINE_MAX2048];
1000	const char fs, controller_str;
1001	size_t cs = 0;
1002	int unified;
1003
1004	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1004 , __PRETTY_FUNCTION__); } while (0);
1005	assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/cgroup-util.c" , 1005, __PRETTY_FUNCTION__); } while (0);
1006
1007	if (controller) {
1008	if (!cg_controller_is_valid(controller))
1009	return -EINVAL22;
1010	} else
1011	controller = SYSTEMD_CGROUP_CONTROLLER"_systemd";
1012
1013	unified = cg_unified_controller(controller);
1014	if (unified < 0)
1015	return unified;
1016	if (unified == 0) {
1017	if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)(strcmp((controller),("_systemd")) == 0))
1018	controller_str = SYSTEMD_CGROUP_CONTROLLER_LEGACY"name=systemd";
1019	else
1020	controller_str = controller;
1021
1022	cs = strlen(controller_str);
1023	}
1024
1025	fs = procfs_file_alloca(pid, "cgroup")({ pid_t _pid_ = (pid); const char _r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "cgroup"); } else { _r_ = __builtin_alloca ( (sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2(sizeof(pid_t) > 8)]))) + 1 + sizeof("cgroup")); sprintf((char*) _r_, "/proc/""%" "i""/" "cgroup", _pid_); } _r_; });
1026	f = fopen(fs, "re");
1027	if (!f)
1028	return errno(__errno_location ()) == ENOENT2 ? -ESRCH3 : -errno(__errno_location ());
1029
1030	(void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER);
1031
1032	FOREACH_LINE(line, f, return -errno)for (;;) if (!fgets(line, sizeof(line), f)) { if (ferror(f)) { return -(*__errno_location ()); } break; } else {
1033	char e, p;
1034
1035	truncate_nl(line);
1036
1037	if (unified) {
1038	e = startswith(line, "0:");
1039	if (!e)
1040	continue;
1041
1042	e = strchr(e, ':');
1043	if (!e)
1044	continue;
1045	} else {
1046	char *l;
1047	size_t k;
1048	const char word, state;
1049	bool_Bool found = false0;
1050
1051	l = strchr(line, ':');
1052	if (!l)
1053	continue;
1054
1055	l++;
1056	e = strchr(l, ':');
1057	if (!e)
1058	continue;
1059
1060	*e = 0;
1061	FOREACH_WORD_SEPARATOR(word, k, l, ",", state)for ((state) = (l), (word) = split(&(state), &(k), ("," ), (0)); (word); (word) = split(&(state), &(k), (",") , (0)))
1062	if (k == cs && memcmp(word, controller_str, cs) == 0) {
1063	found = true1;
1064	break;
1065	}
1066	if (!found)
1067	continue;
1068	}
1069
1070	p = strdup(e + 1);
1071	if (!p)
1072	return -ENOMEM12;
1073
1074	/* Truncate suffix indicating the process is a zombie */
1075	e = endswith(p, " (deleted)");
1076	if (e)
1077	*e = 0;
1078
1079	*path = p;
1080	return 0;
1081	}
1082
1083	return -ENODATA61;
1084	}
1085
1086	int cg_install_release_agent(const char controller, const char agent) {
1087	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0), contents = NULL((void)0);
1088	const char *sc;
1089	int r;
1090
1091	assert(agent)do { if ((__builtin_expect(!!(!(agent)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("agent"), "../src/basic/cgroup-util.c", 1091 , __PRETTY_FUNCTION__); } while (0);
1092
1093	r = cg_unified_controller(controller);
1094	if (r < 0)
1095	return r;
1096	if (r > 0) /* doesn't apply to unified hierarchy */
1097	return -EOPNOTSUPP95;
1098
1099	r = cg_get_path(controller, NULL((void*)0), "release_agent", &fs);
1100	if (r < 0)
1101	return r;
1102
1103	r = read_one_line_file(fs, &contents);
1104	if (r < 0)
1105	return r;
1106
1107	sc = strstrip(contents);
1108	if (isempty(sc)) {
1109	r = write_string_file(fs, agent, 0);
1110	if (r < 0)
1111	return r;
1112	} else if (!path_equal(sc, agent))
1113	return -EEXIST17;
1114
1115	fs = mfree(fs);
1116	r = cg_get_path(controller, NULL((void*)0), "notify_on_release", &fs);
1117	if (r < 0)
1118	return r;
1119
1120	contents = mfree(contents);
1121	r = read_one_line_file(fs, &contents);
1122	if (r < 0)
1123	return r;
1124
1125	sc = strstrip(contents);
1126	if (streq(sc, "0")(strcmp((sc),("0")) == 0)) {
1127	r = write_string_file(fs, "1", 0);
1128	if (r < 0)
1129	return r;
1130
1131	return 1;
1132	}
1133
1134	if (!streq(sc, "1")(strcmp((sc),("1")) == 0))
1135	return -EIO5;
1136
1137	return 0;
1138	}
1139
1140	int cg_uninstall_release_agent(const char *controller) {
1141	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
1142	int r;
1143
1144	r = cg_unified_controller(controller);
1145	if (r < 0)
1146	return r;
1147	if (r > 0) /* Doesn't apply to unified hierarchy */
1148	return -EOPNOTSUPP95;
1149
1150	r = cg_get_path(controller, NULL((void*)0), "notify_on_release", &fs);
1151	if (r < 0)
1152	return r;
1153
1154	r = write_string_file(fs, "0", 0);
1155	if (r < 0)
1156	return r;
1157
1158	fs = mfree(fs);
1159
1160	r = cg_get_path(controller, NULL((void*)0), "release_agent", &fs);
1161	if (r < 0)
1162	return r;
1163
1164	r = write_string_file(fs, "", 0);
1165	if (r < 0)
1166	return r;
1167
1168	return 0;
1169	}
1170
1171	int cg_is_empty(const char controller, const char path) {
1172	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
1173	pid_t pid;
1174	int r;
1175
1176	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1176 , __PRETTY_FUNCTION__); } while (0);
1177
1178	r = cg_enumerate_processes(controller, path, &f);
1179	if (r == -ENOENT2)
1180	return 1;
1181	if (r < 0)
1182	return r;
1183
1184	r = cg_read_pid(f, &pid);
1185	if (r < 0)
1186	return r;
1187
1188	return r == 0;
1189	}
1190
1191	int cg_is_empty_recursive(const char controller, const char path) {
1192	int r;
1193
1194	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1194 , __PRETTY_FUNCTION__); } while (0);
1195
1196	/* The root cgroup is always populated */
1197	if (controller && empty_or_root(path))
1198	return false0;
1199
1200	r = cg_unified_controller(controller);
1201	if (r < 0)
1202	return r;
1203	if (r > 0) {
1204	_cleanup_free___attribute__((cleanup(freep))) char t = NULL((void)0);
1205
1206	/* On the unified hierarchy we can check empty state
1207	* via the "populated" attribute of "cgroup.events". */
1208
1209	r = cg_read_event(controller, path, "populated", &t);
1210	if (r < 0)
1211	return r;
1212
1213	return streq(t, "0")(strcmp((t),("0")) == 0);
1214	} else {
1215	_cleanup_closedir___attribute__((cleanup(closedirp))) DIR d = NULL((void)0);
1216	char *fn;
1217
1218	r = cg_is_empty(controller, path);
1219	if (r <= 0)
1220	return r;
1221
1222	r = cg_enumerate_subgroups(controller, path, &d);
1223	if (r == -ENOENT2)
1224	return 1;
1225	if (r < 0)
1226	return r;
1227
1228	while ((r = cg_read_subgroup(d, &fn)) > 0) {
1229	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
1230
1231	p = strjoin(path, "/", fn)strjoin_real((path), "/", fn, ((void*)0));
1232	free(fn);
1233	if (!p)
1234	return -ENOMEM12;
1235
1236	r = cg_is_empty_recursive(controller, p);
1237	if (r <= 0)
1238	return r;
1239	}
1240	if (r < 0)
1241	return r;
1242
1243	return true1;
1244	}
1245	}
1246
1247	int cg_split_spec(const char spec, char controller, char *path) {
1248	char t = NULL((void)0), u = NULL((void)0);
1249	const char *e;
1250
1251	assert(spec)do { if ((__builtin_expect(!!(!(spec)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("spec"), "../src/basic/cgroup-util.c", 1251 , __PRETTY_FUNCTION__); } while (0);
1252
1253	if (*spec == '/') {
1254	if (!path_is_normalized(spec))
1255	return -EINVAL22;
1256
1257	if (path) {
1258	t = strdup(spec);
1259	if (!t)
1260	return -ENOMEM12;
1261
1262	*path = path_simplify(t, false0);
1263	}
1264
1265	if (controller)
1266	controller = NULL((void)0);
1267
1268	return 0;
1269	}
1270
1271	e = strchr(spec, ':');
1272	if (!e) {
1273	if (!cg_controller_is_valid(spec))
1274	return -EINVAL22;
1275
1276	if (controller) {
1277	t = strdup(spec);
1278	if (!t)
1279	return -ENOMEM12;
1280
1281	*controller = t;
1282	}
1283
1284	if (path)
1285	path = NULL((void)0);
1286
1287	return 0;
1288	}
1289
1290	t = strndup(spec, e-spec);
1291	if (!t)
1292	return -ENOMEM12;
1293	if (!cg_controller_is_valid(t)) {
1294	free(t);
1295	return -EINVAL22;
1296	}
1297
1298	if (isempty(e+1))
1299	u = NULL((void*)0);
1300	else {
1301	u = strdup(e+1);
1302	if (!u) {
1303	free(t);
1304	return -ENOMEM12;
1305	}
1306
1307	if (!path_is_normalized(u) \|\|
1308	!path_is_absolute(u)) {
1309	free(t);
1310	free(u);
1311	return -EINVAL22;
1312	}
1313
1314	path_simplify(u, false0);
1315	}
1316
1317	if (controller)
1318	*controller = t;
1319	else
1320	free(t);
1321
1322	if (path)
1323	*path = u;
1324	else
1325	free(u);
1326
1327	return 0;
1328	}
1329
1330	int cg_mangle_path(const char path, char *result) {
1331	_cleanup_free___attribute__((cleanup(freep))) char c = NULL((void)0), p = NULL((void)0);
1332	char *t;
1333	int r;
1334
1335	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1335 , __PRETTY_FUNCTION__); } while (0);
1336	assert(result)do { if ((__builtin_expect(!!(!(result)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("result"), "../src/basic/cgroup-util.c", 1336, __PRETTY_FUNCTION__); } while (0);
1337
1338	/* First, check if it already is a filesystem path */
1339	if (path_startswith(path, "/sys/fs/cgroup")) {
1340
1341	t = strdup(path);
1342	if (!t)
1343	return -ENOMEM12;
1344
1345	*result = path_simplify(t, false0);
1346	return 0;
1347	}
1348
1349	/* Otherwise, treat it as cg spec */
1350	r = cg_split_spec(path, &c, &p);
1351	if (r < 0)
1352	return r;
1353
1354	return cg_get_path(c ?: SYSTEMD_CGROUP_CONTROLLER"_systemd", p ?: "/", NULL((void*)0), result);
1355	}
1356
1357	int cg_get_root_path(char **path) {
1358	char p, e;
1359	int r;
1360
1361	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1361 , __PRETTY_FUNCTION__); } while (0);
1362
1363	r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER"_systemd", 1, &p);
1364	if (r < 0)
1365	return r;
1366
1367	e = endswith(p, "/" SPECIAL_INIT_SCOPE"init.scope");
1368	if (!e)
1369	e = endswith(p, "/" SPECIAL_SYSTEM_SLICE"system.slice"); /* legacy */
1370	if (!e)
1371	e = endswith(p, "/system"); /* even more legacy */
1372	if (e)
1373	*e = 0;
1374
1375	*path = p;
1376	return 0;
1377	}
1378
1379	int cg_shift_path(const char cgroup, const char root, const char **shifted) {
1380	_cleanup_free___attribute__((cleanup(freep))) char rt = NULL((void)0);
1381	char *p;
1382	int r;
1383
1384	assert(cgroup)do { if ((__builtin_expect(!!(!(cgroup)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cgroup"), "../src/basic/cgroup-util.c", 1384, __PRETTY_FUNCTION__); } while (0);
1385	assert(shifted)do { if ((__builtin_expect(!!(!(shifted)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("shifted"), "../src/basic/cgroup-util.c" , 1385, __PRETTY_FUNCTION__); } while (0);
1386
1387	if (!root) {
1388	/* If the root was specified let's use that, otherwise
1389	* let's determine it from PID 1 */
1390
1391	r = cg_get_root_path(&rt);
1392	if (r < 0)
1393	return r;
1394
1395	root = rt;
1396	}
1397
1398	p = path_startswith(cgroup, root);
1399	if (p && p > cgroup)
1400	*shifted = p - 1;
1401	else
1402	*shifted = cgroup;
1403
1404	return 0;
1405	}
1406
1407	int cg_pid_get_path_shifted(pid_t pid, const char root, char *cgroup) {
1408	_cleanup_free___attribute__((cleanup(freep))) char raw = NULL((void)0);
1409	const char *c;
1410	int r;
1411
1412	assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/cgroup-util.c" , 1412, __PRETTY_FUNCTION__); } while (0);
1413	assert(cgroup)do { if ((__builtin_expect(!!(!(cgroup)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cgroup"), "../src/basic/cgroup-util.c", 1413, __PRETTY_FUNCTION__); } while (0);
1414
1415	r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER"_systemd", pid, &raw);
1416	if (r < 0)
1417	return r;
1418
1419	r = cg_shift_path(raw, root, &c);
1420	if (r < 0)
1421	return r;
1422
1423	if (c == raw)
1424	cgroup = TAKE_PTR(raw)({ typeof(raw) _ptr_ = (raw); (raw) = ((void)0); _ptr_; });
1425	else {
1426	char *n;
1427
1428	n = strdup(c);
1429	if (!n)
1430	return -ENOMEM12;
1431
1432	*cgroup = n;
1433	}
1434
1435	return 0;
1436	}
1437
1438	int cg_path_decode_unit(const char cgroup, char *unit) {
1439	char c, s;
1440	size_t n;
1441
1442	assert(cgroup)do { if ((__builtin_expect(!!(!(cgroup)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("cgroup"), "../src/basic/cgroup-util.c", 1442, __PRETTY_FUNCTION__); } while (0);
1443	assert(unit)do { if ((__builtin_expect(!!(!(unit)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("unit"), "../src/basic/cgroup-util.c", 1443 , __PRETTY_FUNCTION__); } while (0);
1444
1445	n = strcspn(cgroup, "/");
1446	if (n < 3)
1447	return -ENXIO6;
1448
1449	c = strndupa(cgroup, n)(__extension__ ({ const char __old = (cgroup); size_t __len = strnlen (__old, (n)); char __new = (char ) __builtin_alloca (__len + 1); __new[__len] = '\0'; (char ) memcpy (__new, __old , __len); }));
1450	c = cg_unescape(c);
1451
1452	if (!unit_name_is_valid(c, UNIT_NAME_PLAIN\|UNIT_NAME_INSTANCE))
1453	return -ENXIO6;
1454
1455	s = strdup(c);
1456	if (!s)
1457	return -ENOMEM12;
1458
1459	*unit = s;
1460	return 0;
1461	}
1462
1463	static bool_Bool valid_slice_name(const char *p, size_t n) {
1464
1465	if (!p)
1466	return false0;
1467
1468	if (n < STRLEN("x.slice")(sizeof("""x.slice""") - 1))
1469	return false0;
1470
1471	if (memcmp(p + n - 6, ".slice", 6) == 0) {
1472	char buf[n+1], *c;
1473
1474	memcpy(buf, p, n);
1475	buf[n] = 0;
1476
1477	c = cg_unescape(buf);
1478
1479	return unit_name_is_valid(c, UNIT_NAME_PLAIN);
1480	}
1481
1482	return false0;
1483	}
1484
1485	static const char skip_slices(const char p) {
1486	assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("p"), "../src/basic/cgroup-util.c", 1486 , __PRETTY_FUNCTION__); } while (0);
1487
1488	/* Skips over all slice assignments */
1489
1490	for (;;) {
1491	size_t n;
1492
1493	p += strspn(p, "/");
1494
1495	n = strcspn(p, "/");
1496	if (!valid_slice_name(p, n))
1497	return p;
1498
1499	p += n;
1500	}
1501	}
1502
1503	int cg_path_get_unit(const char path, char *ret) {
1504	const char *e;
1505	char *unit;
1506	int r;
1507
1508	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1508 , __PRETTY_FUNCTION__); } while (0);
1509	assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/cgroup-util.c", 1509 , __PRETTY_FUNCTION__); } while (0);
1510
1511	e = skip_slices(path);
1512
1513	r = cg_path_decode_unit(e, &unit);
1514	if (r < 0)
1515	return r;
1516
1517	/* We skipped over the slices, don't accept any now */
1518	if (endswith(unit, ".slice")) {
1519	free(unit);
1520	return -ENXIO6;
1521	}
1522
1523	*ret = unit;
1524	return 0;
1525	}
1526
1527	int cg_pid_get_unit(pid_t pid, char **unit) {
1528	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1529	int r;
1530
1531	assert(unit)do { if ((__builtin_expect(!!(!(unit)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("unit"), "../src/basic/cgroup-util.c", 1531 , __PRETTY_FUNCTION__); } while (0);
1532
1533	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1534	if (r < 0)
1535	return r;
1536
1537	return cg_path_get_unit(cgroup, unit);
1538	}
1539
1540	/**
1541	* Skip session-*.scope, but require it to be there.
1542	*/
1543	static const char skip_session(const char p) {
1544	size_t n;
1545
1546	if (isempty(p))
1547	return NULL((void*)0);
1548
1549	p += strspn(p, "/");
1550
1551	n = strcspn(p, "/");
1552	if (n < STRLEN("session-x.scope")(sizeof("""session-x.scope""") - 1))
1553	return NULL((void*)0);
1554
1555	if (memcmp(p, "session-", 8) == 0 && memcmp(p + n - 6, ".scope", 6) == 0) {
1556	char buf[n - 8 - 6 + 1];
1557
1558	memcpy(buf, p + 8, n - 8 - 6);
1559	buf[n - 8 - 6] = 0;
1560
1561	/* Note that session scopes never need unescaping,
1562	* since they cannot conflict with the kernel's own
1563	* names, hence we don't need to call cg_unescape()
1564	* here. */
1565
1566	if (!session_id_valid(buf))
1567	return false0;
1568
1569	p += n;
1570	p += strspn(p, "/");
1571	return p;
1572	}
1573
1574	return NULL((void*)0);
1575	}
1576
1577	/**
1578	* Skip user@*.service, but require it to be there.
1579	*/
1580	static const char skip_user_manager(const char p) {
1581	size_t n;
1582
1583	if (isempty(p))
1584	return NULL((void*)0);
1585
1586	p += strspn(p, "/");
1587
1588	n = strcspn(p, "/");
1589	if (n < STRLEN("user@x.service")(sizeof("""user@x.service""") - 1))
1590	return NULL((void*)0);
1591
1592	if (memcmp(p, "user@", 5) == 0 && memcmp(p + n - 8, ".service", 8) == 0) {
1593	char buf[n - 5 - 8 + 1];
1594
1595	memcpy(buf, p + 5, n - 5 - 8);
1596	buf[n - 5 - 8] = 0;
1597
1598	/* Note that user manager services never need unescaping,
1599	* since they cannot conflict with the kernel's own
1600	* names, hence we don't need to call cg_unescape()
1601	* here. */
1602
1603	if (parse_uid(buf, NULL((void*)0)) < 0)
1604	return NULL((void*)0);
1605
1606	p += n;
1607	p += strspn(p, "/");
1608
1609	return p;
1610	}
1611
1612	return NULL((void*)0);
1613	}
1614
1615	static const char skip_user_prefix(const char path) {
1616	const char e, t;
1617
1618	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1618 , __PRETTY_FUNCTION__); } while (0);
1619
1620	/* Skip slices, if there are any */
1621	e = skip_slices(path);
1622
1623	/* Skip the user manager, if it's in the path now... */
1624	t = skip_user_manager(e);
1625	if (t)
1626	return t;
1627
1628	/* Alternatively skip the user session if it is in the path... */
1629	return skip_session(e);
1630	}
1631
1632	int cg_path_get_user_unit(const char path, char *ret) {
1633	const char *t;
1634
1635	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1635 , __PRETTY_FUNCTION__); } while (0);
1636	assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/cgroup-util.c", 1636 , __PRETTY_FUNCTION__); } while (0);
1637
1638	t = skip_user_prefix(path);
1639	if (!t)
1640	return -ENXIO6;
1641
1642	/* And from here on it looks pretty much the same as for a
1643	* system unit, hence let's use the same parser from here
1644	* on. */
1645	return cg_path_get_unit(t, ret);
1646	}
1647
1648	int cg_pid_get_user_unit(pid_t pid, char **unit) {
1649	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1650	int r;
1651
1652	assert(unit)do { if ((__builtin_expect(!!(!(unit)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("unit"), "../src/basic/cgroup-util.c", 1652 , __PRETTY_FUNCTION__); } while (0);
1653
1654	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1655	if (r < 0)
1656	return r;
1657
1658	return cg_path_get_user_unit(cgroup, unit);
1659	}
1660
1661	int cg_path_get_machine_name(const char path, char *machine) {
1662	_cleanup_free___attribute__((cleanup(freep))) char u = NULL((void)0);
1663	const char *sl;
1664	int r;
1665
1666	r = cg_path_get_unit(path, &u);
1667	if (r < 0)
1668	return r;
1669
1670	sl = strjoina("/run/systemd/machines/unit:", u)({ const char _appendees_[] = { "/run/systemd/machines/unit:" , u }; char _d_, _p_; size_t _len_ = 0; size_t _i_; for (_i_ = 0; _i_ < __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(_appendees_), typeof(&(_appendees_))), sizeof(_appendees_ )/sizeof((_appendees_)[0]), ((void)0))) && _appendees_ [_i_]; _i_++) _len_ += strlen(_appendees_[_i_]); _p_ = _d_ = __builtin_alloca (_len_ + 1); for (_i_ = 0; _i_ < __extension__ (__builtin_choose_expr ( !__builtin_types_compatible_p(typeof(_appendees_), typeof(& (_appendees_))), sizeof(_appendees_)/sizeof((_appendees_)[0] ), ((void)0))) && _appendees_[_i_]; _i_++) _p_ = stpcpy (_p_, _appendees_[_i_]); _p_ = 0; _d_; });
1671	return readlink_malloc(sl, machine);
1672	}
1673
1674	int cg_pid_get_machine_name(pid_t pid, char **machine) {
1675	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1676	int r;
1677
1678	assert(machine)do { if ((__builtin_expect(!!(!(machine)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("machine"), "../src/basic/cgroup-util.c" , 1678, __PRETTY_FUNCTION__); } while (0);
1679
1680	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1681	if (r < 0)
1682	return r;
1683
1684	return cg_path_get_machine_name(cgroup, machine);
1685	}
1686
1687	int cg_path_get_session(const char path, char *session) {
1688	_cleanup_free___attribute__((cleanup(freep))) char unit = NULL((void)0);
1689	char start, end;
1690	int r;
1691
1692	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1692 , __PRETTY_FUNCTION__); } while (0);
1693
1694	r = cg_path_get_unit(path, &unit);
1695	if (r < 0)
1696	return r;
1697
1698	start = startswith(unit, "session-");
1699	if (!start)
1700	return -ENXIO6;
1701	end = endswith(start, ".scope");
1702	if (!end)
1703	return -ENXIO6;
1704
1705	*end = 0;
1706	if (!session_id_valid(start))
1707	return -ENXIO6;
1708
1709	if (session) {
1710	char *rr;
1711
1712	rr = strdup(start);
1713	if (!rr)
1714	return -ENOMEM12;
1715
1716	*session = rr;
1717	}
1718
1719	return 0;
1720	}
1721
1722	int cg_pid_get_session(pid_t pid, char **session) {
1723	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1724	int r;
1725
1726	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1727	if (r < 0)
1728	return r;
1729
1730	return cg_path_get_session(cgroup, session);
1731	}
1732
1733	int cg_path_get_owner_uid(const char path, uid_t uid) {
1734	_cleanup_free___attribute__((cleanup(freep))) char slice = NULL((void)0);
1735	char start, end;
1736	int r;
1737
1738	assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/cgroup-util.c", 1738 , __PRETTY_FUNCTION__); } while (0);
1739
1740	r = cg_path_get_slice(path, &slice);
1741	if (r < 0)
1742	return r;
1743
1744	start = startswith(slice, "user-");
1745	if (!start)
1746	return -ENXIO6;
1747	end = endswith(start, ".slice");
1748	if (!end)
1749	return -ENXIO6;
1750
1751	*end = 0;
1752	if (parse_uid(start, uid) < 0)
1753	return -ENXIO6;
1754
1755	return 0;
1756	}
1757
1758	int cg_pid_get_owner_uid(pid_t pid, uid_t *uid) {
1759	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1760	int r;
1761
1762	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1763	if (r < 0)
1764	return r;
1765
1766	return cg_path_get_owner_uid(cgroup, uid);
1767	}
1768
1769	int cg_path_get_slice(const char p, char *slice) {
1770	const char e = NULL((void)0);
1771
1772	assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("p"), "../src/basic/cgroup-util.c", 1772 , __PRETTY_FUNCTION__); } while (0);
1773	assert(slice)do { if ((__builtin_expect(!!(!(slice)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("slice"), "../src/basic/cgroup-util.c", 1773 , __PRETTY_FUNCTION__); } while (0);
1774
1775	/* Finds the right-most slice unit from the beginning, but
1776	* stops before we come to the first non-slice unit. */
1777
1778	for (;;) {
1779	size_t n;
1780
1781	p += strspn(p, "/");
1782
1783	n = strcspn(p, "/");
1784	if (!valid_slice_name(p, n)) {
1785
1786	if (!e) {
1787	char *s;
1788
1789	s = strdup(SPECIAL_ROOT_SLICE"-.slice");
1790	if (!s)
1791	return -ENOMEM12;
1792
1793	*slice = s;
1794	return 0;
1795	}
1796
1797	return cg_path_decode_unit(e, slice);
1798	}
1799
1800	e = p;
1801	p += n;
1802	}
1803	}
1804
1805	int cg_pid_get_slice(pid_t pid, char **slice) {
1806	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1807	int r;
1808
1809	assert(slice)do { if ((__builtin_expect(!!(!(slice)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("slice"), "../src/basic/cgroup-util.c", 1809 , __PRETTY_FUNCTION__); } while (0);
1810
1811	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1812	if (r < 0)
1813	return r;
1814
1815	return cg_path_get_slice(cgroup, slice);
1816	}
1817
1818	int cg_path_get_user_slice(const char p, char *slice) {
1819	const char *t;
1820	assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("p"), "../src/basic/cgroup-util.c", 1820 , __PRETTY_FUNCTION__); } while (0);
1821	assert(slice)do { if ((__builtin_expect(!!(!(slice)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("slice"), "../src/basic/cgroup-util.c", 1821 , __PRETTY_FUNCTION__); } while (0);
1822
1823	t = skip_user_prefix(p);
1824	if (!t)
1825	return -ENXIO6;
1826
1827	/* And now it looks pretty much the same as for a system
1828	* slice, so let's just use the same parser from here on. */
1829	return cg_path_get_slice(t, slice);
1830	}
1831
1832	int cg_pid_get_user_slice(pid_t pid, char **slice) {
1833	_cleanup_free___attribute__((cleanup(freep))) char cgroup = NULL((void)0);
1834	int r;
1835
1836	assert(slice)do { if ((__builtin_expect(!!(!(slice)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("slice"), "../src/basic/cgroup-util.c", 1836 , __PRETTY_FUNCTION__); } while (0);
1837
1838	r = cg_pid_get_path_shifted(pid, NULL((void*)0), &cgroup);
1839	if (r < 0)
1840	return r;
1841
1842	return cg_path_get_user_slice(cgroup, slice);
1843	}
1844
1845	char cg_escape(const char p) {
1846	bool_Bool need_prefix = false0;
1847
1848	/* This implements very minimal escaping for names to be used
1849	* as file names in the cgroup tree: any name which might
1850	* conflict with a kernel name or is prefixed with '_' is
1851	* prefixed with a '_'. That way, when reading cgroup names it
1852	* is sufficient to remove a single prefixing underscore if
1853	* there is one. */
1854
1855	/* The return value of this function (unlike cg_unescape())
1856	* needs free()! */
1857
1858	if (IN_SET(p[0], 0, '_', '.')({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){0, '_', '.'})/sizeof(int)]; switch(p[0]) { case 0: case '_': case '.': _found = 1; break; default: break ; } _found; }) \|\|
1859	streq(p, "notify_on_release")(strcmp((p),("notify_on_release")) == 0) \|\|
1860	streq(p, "release_agent")(strcmp((p),("release_agent")) == 0) \|\|
1861	streq(p, "tasks")(strcmp((p),("tasks")) == 0) \|\|
1862	startswith(p, "cgroup."))
1863	need_prefix = true1;
1864	else {
1865	const char *dot;
1866
1867	dot = strrchr(p, '.');
1868	if (dot) {
1869	CGroupController c;
1870	size_t l = dot - p;
1871
1872	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
1873	const char *n;
1874
1875	n = cgroup_controller_to_string(c);
1876
1877	if (l != strlen(n))
1878	continue;
1879
1880	if (memcmp(p, n, l) != 0)
1881	continue;
1882
1883	need_prefix = true1;
1884	break;
1885	}
1886	}
1887	}
1888
1889	if (need_prefix)
1890	return strappend("_", p);
1891
1892	return strdup(p);
1893	}
1894
1895	char cg_unescape(const char p) {
1896	assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("p"), "../src/basic/cgroup-util.c", 1896 , __PRETTY_FUNCTION__); } while (0);
1897
1898	/* The return value of this function (unlike cg_escape())
1899	* doesn't need free()! */
1900
1901	if (p[0] == '_')
1902	return (char*) p+1;
1903
1904	return (char*) p;
1905	}
1906
1907	#define CONTROLLER_VALID"0123456789" "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "_" \
1908	DIGITS"0123456789" LETTERS"abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
1909	"_"
1910
1911	bool_Bool cg_controller_is_valid(const char *p) {
1912	const char t, s;
1913
1914	if (!p)
1915	return false0;
1916
1917	if (streq(p, SYSTEMD_CGROUP_CONTROLLER)(strcmp((p),("_systemd")) == 0))
1918	return true1;
1919
1920	s = startswith(p, "name=");
1921	if (s)
1922	p = s;
1923
1924	if (IN_SET(p, 0, '_')({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){0, '_'})/sizeof(int)]; switch(p) { case 0: case '_': _found = 1; break; default: break; } _found; }))
1925	return false0;
1926
1927	for (t = p; *t; t++)
1928	if (!strchr(CONTROLLER_VALID"0123456789" "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "_", *t))
1929	return false0;
1930
1931	if (t - p > FILENAME_MAX4096)
1932	return false0;
1933
1934	return true1;
1935	}
1936
1937	int cg_slice_to_path(const char unit, char *ret) {
1938	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0), s = NULL((void)0), e = NULL((void)0);
1939	const char *dash;
1940	int r;
1941
1942	assert(unit)do { if ((__builtin_expect(!!(!(unit)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("unit"), "../src/basic/cgroup-util.c", 1942 , __PRETTY_FUNCTION__); } while (0);
1943	assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/cgroup-util.c", 1943 , __PRETTY_FUNCTION__); } while (0);
1944
1945	if (streq(unit, SPECIAL_ROOT_SLICE)(strcmp((unit),("-.slice")) == 0)) {
1946	char *x;
1947
1948	x = strdup("");
1949	if (!x)
1950	return -ENOMEM12;
1951	*ret = x;
1952	return 0;
1953	}
1954
1955	if (!unit_name_is_valid(unit, UNIT_NAME_PLAIN))
1956	return -EINVAL22;
1957
1958	if (!endswith(unit, ".slice"))
1959	return -EINVAL22;
1960
1961	r = unit_name_to_prefix(unit, &p);
1962	if (r < 0)
1963	return r;
1964
1965	dash = strchr(p, '-');
1966
1967	/* Don't allow initial dashes */
1968	if (dash == p)
1969	return -EINVAL22;
1970
1971	while (dash) {
1972	_cleanup_free___attribute__((cleanup(freep))) char escaped = NULL((void)0);
1973	char n[dash - p + sizeof(".slice")];
1974
1975	#if HAS_FEATURE_MEMORY_SANITIZER0
1976	/* msan doesn't instrument stpncpy, so it thinks
1977	* n is later used unitialized:
1978	* https://github.com/google/sanitizers/issues/926
1979	*/
1980	zero(n)(({ size_t _l_ = (sizeof(n)); void *_x_ = (&(n)); _l_ == 0 ? _x_ : memset(_x_, 0, _l_); }));
1981	#endif
1982
1983	/* Don't allow trailing or double dashes */
1984	if (IN_SET(dash[1], 0, '-')({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){0, '-'})/sizeof(int)]; switch(dash[1]) { case 0: case '-': _found = 1; break; default: break; } _found ; }))
1985	return -EINVAL22;
1986
1987	strcpy(stpncpy(n, p, dash - p), ".slice");
1988	if (!unit_name_is_valid(n, UNIT_NAME_PLAIN))
1989	return -EINVAL22;
1990
1991	escaped = cg_escape(n);
1992	if (!escaped)
1993	return -ENOMEM12;
1994
1995	if (!strextend(&s, escaped, "/", NULL)strextend_with_separator(&s, ((void)0), escaped, "/", (( void)0)))
1996	return -ENOMEM12;
1997
1998	dash = strchr(dash+1, '-');
1999	}
2000
2001	e = cg_escape(unit);
2002	if (!e)
2003	return -ENOMEM12;
2004
2005	if (!strextend(&s, e, NULL)strextend_with_separator(&s, ((void)0), e, ((void)0)))
2006	return -ENOMEM12;
2007
2008	ret = TAKE_PTR(s)({ typeof(s) _ptr_ = (s); (s) = ((void)0); _ptr_; });
2009
2010	return 0;
2011	}
2012
2013	int cg_set_attribute(const char controller, const char path, const char attribute, const char value) {
2014	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
2015	int r;
2016
2017	r = cg_get_path(controller, path, attribute, &p);
2018	if (r < 0)
2019	return r;
2020
2021	return write_string_file(p, value, 0);
2022	}
2023
2024	int cg_get_attribute(const char controller, const char path, const char attribute, char *ret) {
2025	_cleanup_free___attribute__((cleanup(freep))) char p = NULL((void)0);
2026	int r;
2027
2028	r = cg_get_path(controller, path, attribute, &p);
2029	if (r < 0)
2030	return r;
2031
2032	return read_one_line_file(p, ret);
2033	}
2034
2035	int cg_get_keyed_attribute_full(
2036	const char *controller,
2037	const char *path,
2038	const char *attribute,
2039	char **keys,
2040	char **ret_values,
2041	CGroupKeyMode mode) {
2042
2043	_cleanup_free___attribute__((cleanup(freep))) char filename = NULL((void)0), contents = NULL((void)0);
2044	const char *p;
2045	size_t n, i, n_done = 0;
2046	char **v;
2047	int r;
2048
2049	/* Reads one or more fields of a cgroupsv2 keyed attribute file. The 'keys' parameter should be an strv with
2050	* all keys to retrieve. The 'ret_values' parameter should be passed as string size with the same number of
2051	* entries as 'keys'. On success each entry will be set to the value of the matching key.
2052	*
2053	* If the attribute file doesn't exist at all returns ENOENT, if any key is not found returns ENXIO. If mode
2054	* is set to GG_KEY_MODE_GRACEFUL we ignore missing keys and return those that were parsed successfully. */
2055
2056	r = cg_get_path(controller, path, attribute, &filename);
2057	if (r < 0)
2058	return r;
2059
2060	r = read_full_file(filename, &contents, NULL((void*)0));
2061	if (r < 0)
2062	return r;
2063
2064	n = strv_length(keys);
2065	if (n == 0) /* No keys to retrieve? That's easy, we are done then */
2066	return 0;
2067
2068	/* Let's build this up in a temporary array for now in order not to clobber the return parameter on failure */
2069	v = newa0(char, n)({ do { if ((__builtin_expect(!!(!(!size_multiply_overflow(sizeof (char), n))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("!size_multiply_overflow(sizeof(char), n)"), "../src/basic/cgroup-util.c" , 2069, __PRETTY_FUNCTION__); } while (0); (char) ({ char _new_; size_t _len_ = sizeof(char)(n); _new_ = __builtin_alloca (_len_); (void *) memset(_new_, 0, _len_); }); });
2070
2071	for (p = contents; *p;) {
2072	const char w = NULL((void)0);
2073
2074	for (i = 0; i < n; i++)
2075	if (!v[i]) {
2076	w = first_word(p, keys[i]);
2077	if (w)
2078	break;
2079	}
2080
2081	if (w) {
2082	size_t l;
2083
2084	l = strcspn(w, NEWLINE"\n\r");
2085	v[i] = strndup(w, l);
2086	if (!v[i]) {
2087	r = -ENOMEM12;
2088	goto fail;
2089	}
2090
2091	n_done++;
2092	if (n_done >= n)
2093	goto done;
2094
2095	p = w + l;
2096	} else
2097	p += strcspn(p, NEWLINE"\n\r");
2098
2099	p += strspn(p, NEWLINE"\n\r");
2100	}
2101
2102	if (mode & CG_KEY_MODE_GRACEFUL)
2103	goto done;
2104
2105	r = -ENXIO6;
2106
2107	fail:
2108	for (i = 0; i < n; i++)
2109	free(v[i]);
2110
2111	return r;
2112
2113	done:
2114	memcpy(ret_values, v, sizeof(char) n);
2115	if (mode & CG_KEY_MODE_GRACEFUL)
2116	return n_done;
2117
2118	return 0;
2119
2120	}
2121
2122	int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path) {
2123	CGroupController c;
2124	bool_Bool created;
2125	int r;
2126
2127	/* This one will create a cgroup in our private tree, but also
2128	* duplicate it in the trees specified in mask, and remove it
2129	* in all others.
2130	*
2131	* Returns 0 if the group already existed in the systemd hierarchy,
2132	* 1 on success, negative otherwise.
2133	*/
2134
2135	/* First create the cgroup in our own hierarchy. */
2136	r = cg_create(SYSTEMD_CGROUP_CONTROLLER"_systemd", path);
2137	if (r < 0)
2138	return r;
2139	created = !!r;
2140
2141	/* If we are in the unified hierarchy, we are done now */
2142	r = cg_all_unified();
2143	if (r < 0)
2144	return r;
2145	if (r > 0)
2146	return created;
2147
2148	/* Otherwise, do the same in the other hierarchies */
2149	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2150	CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2151	const char *n;
2152
2153	n = cgroup_controller_to_string(c);
2154
2155	if (mask & bit)
2156	(void) cg_create(n, path);
2157	else if (supported & bit)
2158	(void) cg_trim(n, path, true1);
2159	}
2160
2161	return created;
2162	}
2163
2164	int cg_attach_everywhere(CGroupMask supported, const char path, pid_t pid, cg_migrate_callback_t path_callback, void userdata) {
2165	CGroupController c;
2166	int r;
2167
2168	r = cg_attach(SYSTEMD_CGROUP_CONTROLLER"_systemd", path, pid);
2169	if (r < 0)
2170	return r;
2171
2172	r = cg_all_unified();
2173	if (r < 0)
2174	return r;
2175	if (r > 0)
2176	return 0;
2177
2178	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2179	CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2180	const char p = NULL((void)0);
2181
2182	if (!(supported & bit))
2183	continue;
2184
2185	if (path_callback)
2186	p = path_callback(bit, userdata);
2187
2188	if (!p)
2189	p = path;
2190
2191	(void) cg_attach_fallback(cgroup_controller_to_string(c), p, pid);
2192	}
2193
2194	return 0;
2195	}
2196
2197	int cg_attach_many_everywhere(CGroupMask supported, const char path, Set pids, cg_migrate_callback_t path_callback, void *userdata) {
2198	Iterator i;
2199	void *pidp;
2200	int r = 0;
2201
2202	SET_FOREACH(pidp, pids, i)for ((i) = ((Iterator) { .idx = ((2147483647 2U +1U) - 1), . next_key = ((void)0) }); set_iterate((pids), &(i), (void **)&(pidp)); ) {
2203	pid_t pid = PTR_TO_PID(pidp);
2204	int q;
2205
2206	q = cg_attach_everywhere(supported, path, pid, path_callback, userdata);
2207	if (q < 0 && r >= 0)
2208	r = q;
2209	}
2210
2211	return r;
2212	}
2213
2214	int cg_migrate_everywhere(CGroupMask supported, const char from, const char to, cg_migrate_callback_t to_callback, void *userdata) {
2215	CGroupController c;
2216	int r = 0, q;
2217
2218	if (!path_equal(from, to)) {
2219	r = cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER"_systemd", from, SYSTEMD_CGROUP_CONTROLLER"_systemd", to, CGROUP_REMOVE);
2220	if (r < 0)
2221	return r;
2222	}
2223
2224	q = cg_all_unified();
2225	if (q < 0)
2226	return q;
2227	if (q > 0)
2228	return r;
2229
2230	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2231	CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2232	const char p = NULL((void)0);
2233
2234	if (!(supported & bit))
2235	continue;
2236
2237	if (to_callback)
2238	p = to_callback(bit, userdata);
2239
2240	if (!p)
2241	p = to;
2242
2243	(void) cg_migrate_recursive_fallback(SYSTEMD_CGROUP_CONTROLLER"_systemd", to, cgroup_controller_to_string(c), p, 0);
2244	}
2245
2246	return 0;
2247	}
2248
2249	int cg_trim_everywhere(CGroupMask supported, const char *path, bool_Bool delete_root) {
2250	CGroupController c;
2251	int r, q;
2252
2253	r = cg_trim(SYSTEMD_CGROUP_CONTROLLER"_systemd", path, delete_root);
2254	if (r < 0)
2255	return r;
2256
2257	q = cg_all_unified();
2258	if (q < 0)
2259	return q;
2260	if (q > 0)
2261	return r;
2262
2263	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2264	CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2265
2266	if (!(supported & bit))
2267	continue;
2268
2269	(void) cg_trim(cgroup_controller_to_string(c), path, delete_root);
2270	}
2271
2272	return 0;
2273	}
2274
2275	int cg_mask_to_string(CGroupMask mask, char **ret) {
2276	_cleanup_free___attribute__((cleanup(freep))) char s = NULL((void)0);
2277	size_t n = 0, allocated = 0;
2278	bool_Bool space = false0;
2279	CGroupController c;
2280
2281	assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/cgroup-util.c", 2281 , __PRETTY_FUNCTION__); } while (0);
2282
2283	if (mask == 0) {
2284	ret = NULL((void)0);
2285	return 0;
2286	}
2287
2288	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2289	const char *k;
2290	size_t l;
2291
2292	if (!(mask & CGROUP_CONTROLLER_TO_MASK(c)(1 << (c))))
2293	continue;
2294
2295	k = cgroup_controller_to_string(c);
2296	l = strlen(k);
2297
2298	if (!GREEDY_REALLOC(s, allocated, n + space + l + 1)greedy_realloc((void**) &(s), &(allocated), (n + space + l + 1), sizeof((s)[0])))
2299	return -ENOMEM12;
2300
2301	if (space)
2302	s[n] = ' ';
2303	memcpy(s + n + space, k, l);
2304	n += space + l;
2305
2306	space = true1;
2307	}
2308
2309	assert(s)do { if ((__builtin_expect(!!(!(s)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("s"), "../src/basic/cgroup-util.c", 2309 , __PRETTY_FUNCTION__); } while (0);
2310
2311	s[n] = 0;
2312	ret = TAKE_PTR(s)({ typeof(s) _ptr_ = (s); (s) = ((void)0); _ptr_; });
2313
2314	return 0;
2315	}
2316
2317	int cg_mask_from_string(const char value, CGroupMask mask) {
2318	assert(mask)do { if ((__builtin_expect(!!(!(mask)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("mask"), "../src/basic/cgroup-util.c", 2318 , __PRETTY_FUNCTION__); } while (0);
2319	assert(value)do { if ((__builtin_expect(!!(!(value)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("value"), "../src/basic/cgroup-util.c", 2319 , __PRETTY_FUNCTION__); } while (0);
2320
2321	for (;;) {
2322	_cleanup_free___attribute__((cleanup(freep))) char n = NULL((void)0);
2323	CGroupController v;
2324	int r;
2325
2326	r = extract_first_word(&value, &n, NULL((void*)0), 0);
2327	if (r < 0)
2328	return r;
2329	if (r == 0)
2330	break;
2331
2332	v = cgroup_controller_from_string(n);
2333	if (v < 0)
2334	continue;
2335
2336	*mask \|= CGROUP_CONTROLLER_TO_MASK(v)(1 << (v));
2337	}
2338	return 0;
2339	}
2340
2341	int cg_mask_supported(CGroupMask *ret) {
2342	CGroupMask mask = 0;
2343	int r;
2344
2345	/* Determines the mask of supported cgroup controllers. Only
2346	* includes controllers we can make sense of and that are
2347	* actually accessible. */
2348
2349	r = cg_all_unified();
2350	if (r < 0)
2351	return r;
2352	if (r > 0) {
2353	_cleanup_free___attribute__((cleanup(freep))) char root = NULL((void)0), controllers = NULL((void)0), path = NULL((void)0);
2354
2355	/* In the unified hierarchy we can read the supported
2356	* and accessible controllers from a the top-level
2357	* cgroup attribute */
2358
2359	r = cg_get_root_path(&root);
2360	if (r < 0)
2361	return r;
2362
2363	r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER"_systemd", root, "cgroup.controllers", &path);
2364	if (r < 0)
2365	return r;
2366
2367	r = read_one_line_file(path, &controllers);
2368	if (r < 0)
2369	return r;
2370
2371	r = cg_mask_from_string(controllers, &mask);
2372	if (r < 0)
2373	return r;
2374
2375	/* Currently, we support the cpu, memory, io, pids and cpuset
2376	* controller in the unified hierarchy, mask
2377	* everything else off. */
2378	mask &= CGROUP_MASK_CPU \| CGROUP_MASK_MEMORY \| CGROUP_MASK_IO \| CGROUP_MASK_PIDS \| CGROUP_MASK_CPUSET;
2379
2380	} else {
2381	CGroupController c;
2382
2383	/* In the legacy hierarchy, we check whether which
2384	* hierarchies are mounted. */
2385
2386	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2387	const char *n;
2388
2389	if (c == CGROUP_CONTROLLER_CPUSET)
2390	continue;
2391
2392	n = cgroup_controller_to_string(c);
2393	if (controller_is_accessible(n) >= 0)
2394	mask \|= CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2395	}
2396	}
2397
2398	*ret = mask;
2399	return 0;
2400	}
2401
2402	int cg_kernel_controllers(Set **ret) {
2403	_cleanup_set_free_free___attribute__((cleanup(set_free_freep))) Set controllers = NULL((void)0);
2404	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
2405	int r;
2406
2407	assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/cgroup-util.c", 2407 , __PRETTY_FUNCTION__); } while (0);
2408
2409	/* Determines the full list of kernel-known controllers. Might
2410	* include controllers we don't actually support, arbitrary
2411	* named hierarchies and controllers that aren't currently
2412	* accessible (because not mounted). */
2413
2414	controllers = set_new(&string_hash_ops)internal_set_new(&string_hash_ops );
2415	if (!controllers)
2416	return -ENOMEM12;
2417
2418	f = fopen("/proc/cgroups", "re");
2419	if (!f) {
2420	if (errno(*__errno_location ()) == ENOENT2) {
2421	ret = NULL((void)0);
2422	return 0;
2423	}
2424
2425	return -errno(*__errno_location ());
2426	}
2427
2428	(void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER);
2429
2430	/* Ignore the header line */
2431	(void) read_line(f, (size_t) -1, NULL((void*)0));
2432
2433	for (;;) {
2434	char *controller;
2435	int enabled = 0;
2436
2437	errno(*__errno_location ()) = 0;
2438	if (fscanf(f, "%ms %i %i %i", &controller, &enabled) != 2) {
2439
2440	if (feof(f))
2441	break;
2442
2443	if (ferror(f) && errno(*__errno_location ()) > 0)
2444	return -errno(*__errno_location ());
2445
2446	return -EBADMSG74;
2447	}
2448
2449	if (!enabled) {
2450	free(controller);
2451	continue;
2452	}
2453
2454	if (!cg_controller_is_valid(controller)) {
2455	free(controller);
2456	return -EBADMSG74;
2457	}
2458
2459	r = set_consume(controllers, controller);
2460	if (r < 0)
2461	return r;
2462	}
2463
2464	ret = TAKE_PTR(controllers)({ typeof(controllers) _ptr_ = (controllers); (controllers) = ((void)0); _ptr_; });
2465
2466	return 0;
2467	}
2468
2469	static thread_local__thread CGroupUnified unified_cache = CGROUP_UNIFIED_UNKNOWN;
2470
2471	/* The hybrid mode was initially implemented in v232 and simply mounted cgroup v2 on /sys/fs/cgroup/systemd. This
2472	* unfortunately broke other tools (such as docker) which expected the v1 "name=systemd" hierarchy on
2473	* /sys/fs/cgroup/systemd. From v233 and on, the hybrid mode mountnbs v2 on /sys/fs/cgroup/unified and maintains
2474	* "name=systemd" hierarchy on /sys/fs/cgroup/systemd for compatibility with other tools.
2475	*
2476	* To keep live upgrade working, we detect and support v232 layout. When v232 layout is detected, to keep cgroup v2
2477	* process management but disable the compat dual layout, we return %true on
2478	* cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) and %false on cg_hybrid_unified().
2479	*/
2480	static thread_local__thread bool_Bool unified_systemd_v232;
2481
2482	static int cg_unified_update(void) {
2483
2484	struct statfs fs;
2485
2486	/* Checks if we support the unified hierarchy. Returns an
2487	* error when the cgroup hierarchies aren't mounted yet or we
2488	* have any other trouble determining if the unified hierarchy
2489	* is supported. */
2490
2491	if (unified_cache >= CGROUP_UNIFIED_NONE)
2492	return 0;
2493
2494	if (statfs("/sys/fs/cgroup/", &fs) < 0)
2495	return log_debug_errno(errno, "statfs(\"/sys/fs/cgroup/\") failed: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 \| (_level)), _e, "../src/basic/cgroup-util.c", 2495, __func__ , "statfs(\"/sys/fs/cgroup/\") failed: %m") : -abs(_e); });
2496
2497	if (F_TYPE_EQUAL(fs.f_type, CGROUP2_SUPER_MAGIC)(fs.f_type == (typeof(fs.f_type)) 0x63677270)) {
2498	log_debug("Found cgroup2 on /sys/fs/cgroup/, full unified hierarchy")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2498, __func__, "Found cgroup2 on /sys/fs/cgroup/, full unified hierarchy" ) : -abs(_e); });
2499	unified_cache = CGROUP_UNIFIED_ALL;
2500	} else if (F_TYPE_EQUAL(fs.f_type, TMPFS_MAGIC)(fs.f_type == (typeof(fs.f_type)) 0x01021994)) {
2501	if (statfs("/sys/fs/cgroup/unified/", &fs) == 0 &&
2502	F_TYPE_EQUAL(fs.f_type, CGROUP2_SUPER_MAGIC)(fs.f_type == (typeof(fs.f_type)) 0x63677270)) {
2503	log_debug("Found cgroup2 on /sys/fs/cgroup/unified, unified hierarchy for systemd controller")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2503, __func__, "Found cgroup2 on /sys/fs/cgroup/unified, unified hierarchy for systemd controller" ) : -abs(_e); });
2504	unified_cache = CGROUP_UNIFIED_SYSTEMD;
2505	unified_systemd_v232 = false0;
2506	} else {
2507	if (statfs("/sys/fs/cgroup/systemd/", &fs) < 0)
2508	return log_debug_errno(errno, "statfs(\"/sys/fs/cgroup/systemd\" failed: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 \| (_level)), _e, "../src/basic/cgroup-util.c", 2508, __func__ , "statfs(\"/sys/fs/cgroup/systemd\" failed: %m") : -abs(_e); });
2509
2510	if (F_TYPE_EQUAL(fs.f_type, CGROUP2_SUPER_MAGIC)(fs.f_type == (typeof(fs.f_type)) 0x63677270)) {
2511	log_debug("Found cgroup2 on /sys/fs/cgroup/systemd, unified hierarchy for systemd controller (v232 variant)")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2511, __func__, "Found cgroup2 on /sys/fs/cgroup/systemd, unified hierarchy for systemd controller (v232 variant)" ) : -abs(_e); });
2512	unified_cache = CGROUP_UNIFIED_SYSTEMD;
2513	unified_systemd_v232 = true1;
2514	} else if (F_TYPE_EQUAL(fs.f_type, CGROUP_SUPER_MAGIC)(fs.f_type == (typeof(fs.f_type)) 0x27e0eb)) {
2515	log_debug("Found cgroup on /sys/fs/cgroup/systemd, legacy hierarchy")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2515, __func__, "Found cgroup on /sys/fs/cgroup/systemd, legacy hierarchy" ) : -abs(_e); });
2516	unified_cache = CGROUP_UNIFIED_NONE;
2517	} else {
2518	log_debug("Unexpected filesystem type %llx mounted on /sys/fs/cgroup/systemd, assuming legacy hierarchy",({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2519, __func__, "Unexpected filesystem type %llx mounted on /sys/fs/cgroup/systemd, assuming legacy hierarchy" , (unsigned long long) fs.f_type) : -abs(_e); })
2519	(unsigned long long) fs.f_type)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2519, __func__, "Unexpected filesystem type %llx mounted on /sys/fs/cgroup/systemd, assuming legacy hierarchy" , (unsigned long long) fs.f_type) : -abs(_e); });
2520	unified_cache = CGROUP_UNIFIED_NONE;
2521	}
2522	}
2523	} else {
2524	log_debug("Unknown filesystem type %llx mounted on /sys/fs/cgroup.",({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2525, __func__, "Unknown filesystem type %llx mounted on /sys/fs/cgroup." , (unsigned long long) fs.f_type) : -abs(_e); })
2525	(unsigned long long) fs.f_type)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2525, __func__, "Unknown filesystem type %llx mounted on /sys/fs/cgroup." , (unsigned long long) fs.f_type) : -abs(_e); });
2526	return -ENOMEDIUM123;
2527	}
2528
2529	return 0;
2530	}
2531
2532	int cg_unified_controller(const char *controller) {
2533	int r;
2534
2535	r = cg_unified_update();
2536	if (r < 0)
2537	return r;
2538
2539	if (unified_cache == CGROUP_UNIFIED_NONE)
2540	return false0;
2541
2542	if (unified_cache >= CGROUP_UNIFIED_ALL)
2543	return true1;
2544
2545	return streq_ptr(controller, SYSTEMD_CGROUP_CONTROLLER"_systemd");
2546	}
2547
2548	int cg_all_unified(void) {
2549	int r;
2550
2551	r = cg_unified_update();
2552	if (r < 0)
2553	return r;
2554
2555	return unified_cache >= CGROUP_UNIFIED_ALL;
2556	}
2557
2558	int cg_hybrid_unified(void) {
2559	int r;
2560
2561	r = cg_unified_update();
2562	if (r < 0)
2563	return r;
2564
2565	return unified_cache == CGROUP_UNIFIED_SYSTEMD && !unified_systemd_v232;
2566	}
2567
2568	int cg_unified_flush(void) {
2569	unified_cache = CGROUP_UNIFIED_UNKNOWN;
2570
2571	return cg_unified_update();
2572	}
2573
2574	int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p) {
2575	_cleanup_fclose___attribute__((cleanup(fclosep))) FILE f = NULL((void)0);
2576	_cleanup_free___attribute__((cleanup(freep))) char fs = NULL((void)0);
2577	CGroupController c;
2578	int r;
2579
2580	assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("p"), "../src/basic/cgroup-util.c", 2580 , __PRETTY_FUNCTION__); } while (0);
2581
2582	if (supported == 0)
2583	return 0;
2584
2585	r = cg_all_unified();
2586	if (r < 0)
2587	return r;
2588	if (r == 0) /* on the legacy hiearchy there's no joining of controllers defined */
2589	return 0;
2590
2591	r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER"_systemd", p, "cgroup.subtree_control", &fs);
2592	if (r < 0)
2593	return r;
2594
2595	for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
2596	CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c)(1 << (c));
2597	const char *n;
2598
2599	if (!(supported & bit))
2600	continue;
2601
2602	n = cgroup_controller_to_string(c);
2603	{
2604	char s[1 + strlen(n) + 1];
2605
2606	s[0] = mask & bit ? '+' : '-';
2607	strcpy(s + 1, n);
2608
2609	if (!f) {
2610	f = fopen(fs, "we");
2611	if (!f) {
2612	log_debug_errno(errno, "Failed to open cgroup.subtree_control file of %s: %m", p)({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 \| (_level)), _e, "../src/basic/cgroup-util.c", 2612, __func__ , "Failed to open cgroup.subtree_control file of %s: %m", p) : -abs(_e); });
2613	break;
2614	}
2615	}
2616
2617	r = write_string_stream(f, s, 0);
2618	if (r < 0) {
2619	log_debug_errno(r, "Failed to enable controller %s for %s (%s): %m", n, p, fs)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 \| (_level)), _e , "../src/basic/cgroup-util.c", 2619, __func__, "Failed to enable controller %s for %s (%s): %m" , n, p, fs) : -abs(_e); });
2620	clearerr(f);
2621	}
2622	}
2623	}
2624
2625	return 0;
2626	}
2627
2628	bool_Bool cg_is_unified_wanted(void) {
2629	static thread_local__thread int wanted = -1;
2630	int r;
2631	bool_Bool b;
2632	const bool_Bool is_default = DEFAULT_HIERARCHYCGROUP_UNIFIED_SYSTEMD == CGROUP_UNIFIED_ALL;
2633
2634	/* If we have a cached value, return that. */
2635	if (wanted >= 0)
2636	return wanted;
2637
2638	/* If the hierarchy is already mounted, then follow whatever
2639	* was chosen for it. */
2640	if (cg_unified_flush() >= 0)
2641	return (wanted = unified_cache >= CGROUP_UNIFIED_ALL);
2642
2643	/* Otherwise, let's see what the kernel command line has to say.
2644	* Since checking is expensive, cache a non-error result. */
2645	r = proc_cmdline_get_bool("systemd.unified_cgroup_hierarchy", &b);
2646
2647	return (wanted = r > 0 ? b : is_default);
2648	}
2649
2650	bool_Bool cg_is_legacy_wanted(void) {
2651	static thread_local__thread int wanted = -1;
2652
2653	/* If we have a cached value, return that. */
2654	if (wanted >= 0)
2655	return wanted;
2656
2657	/* Check if we have cgroups2 already mounted. */
2658	if (cg_unified_flush() >= 0 &&
2659	unified_cache == CGROUP_UNIFIED_ALL)
2660	return (wanted = false0);
2661
2662	/* Otherwise, assume that at least partial legacy is wanted,
2663	* since cgroups2 should already be mounted at this point. */
2664	return (wanted = true1);
2665	}
2666
2667	bool_Bool cg_is_hybrid_wanted(void) {
2668	static thread_local__thread int wanted = -1;
2669	int r;
2670	bool_Bool b;
2671	const bool_Bool is_default = DEFAULT_HIERARCHYCGROUP_UNIFIED_SYSTEMD >= CGROUP_UNIFIED_SYSTEMD;
2672	/* We default to true if the default is "hybrid", obviously,
2673	* but also when the default is "unified", because if we get
2674	* called, it means that unified hierarchy was not mounted. */
2675
2676	/* If we have a cached value, return that. */
2677	if (wanted >= 0)
2678	return wanted;
2679
2680	/* If the hierarchy is already mounted, then follow whatever
2681	* was chosen for it. */
2682	if (cg_unified_flush() >= 0 &&
2683	unified_cache == CGROUP_UNIFIED_ALL)
2684	return (wanted = false0);
2685
2686	/* Otherwise, let's see what the kernel command line has to say.
2687	* Since checking is expensive, cache a non-error result. */
2688	r = proc_cmdline_get_bool("systemd.legacy_systemd_cgroup_controller", &b);
2689
2690	/* The meaning of the kernel option is reversed wrt. to the return value
2691	* of this function, hence the negation. */
2692	return (wanted = r > 0 ? !b : is_default);
2693	}
2694
2695	int cg_weight_parse(const char s, uint64_t ret) {
2696	uint64_t u;
2697	int r;
2698
2699	if (isempty(s)) {
2700	*ret = CGROUP_WEIGHT_INVALID((uint64_t) -1);
2701	return 0;
2702	}
2703
2704	r = safe_atou64(s, &u);
2705	if (r < 0)
2706	return r;
2707
2708	if (u < CGROUP_WEIGHT_MIN1UL \|\| u > CGROUP_WEIGHT_MAX10000UL)
2709	return -ERANGE34;
2710
2711	*ret = u;
2712	return 0;
2713	}
2714
2715	const uint64_t cgroup_io_limit_defaults[_CGROUP_IO_LIMIT_TYPE_MAX] = {
2716	[CGROUP_IO_RBPS_MAX] = CGROUP_LIMIT_MAX((uint64_t) -1),
2717	[CGROUP_IO_WBPS_MAX] = CGROUP_LIMIT_MAX((uint64_t) -1),
2718	[CGROUP_IO_RIOPS_MAX] = CGROUP_LIMIT_MAX((uint64_t) -1),
2719	[CGROUP_IO_WIOPS_MAX] = CGROUP_LIMIT_MAX((uint64_t) -1),
2720	};
2721
2722	static const char* const cgroup_io_limit_type_table[_CGROUP_IO_LIMIT_TYPE_MAX] = {
2723	[CGROUP_IO_RBPS_MAX] = "IOReadBandwidthMax",
2724	[CGROUP_IO_WBPS_MAX] = "IOWriteBandwidthMax",
2725	[CGROUP_IO_RIOPS_MAX] = "IOReadIOPSMax",
2726	[CGROUP_IO_WIOPS_MAX] = "IOWriteIOPSMax",
2727	};
2728
2729	DEFINE_STRING_TABLE_LOOKUP(cgroup_io_limit_type, CGroupIOLimitType)const char cgroup_io_limit_type_to_string(CGroupIOLimitType i ) { if (i < 0 \|\| i >= (CGroupIOLimitType) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p(typeof (cgroup_io_limit_type_table), typeof(&(cgroup_io_limit_type_table ))), sizeof(cgroup_io_limit_type_table)/sizeof((cgroup_io_limit_type_table )[0]), ((void)0)))) return ((void)0); return cgroup_io_limit_type_table [i]; } CGroupIOLimitType cgroup_io_limit_type_from_string(const char s) { return (CGroupIOLimitType) string_table_lookup(cgroup_io_limit_type_table , __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(cgroup_io_limit_type_table), typeof(&*(cgroup_io_limit_type_table ))), sizeof(cgroup_io_limit_type_table)/sizeof((cgroup_io_limit_type_table )[0]), ((void)0))), s); };
2730
2731	int cg_cpu_shares_parse(const char s, uint64_t ret) {
2732	uint64_t u;
2733	int r;
2734
2735	if (isempty(s)) {
2736	*ret = CGROUP_CPU_SHARES_INVALID((uint64_t) -1);
2737	return 0;
2738	}
2739
2740	r = safe_atou64(s, &u);
2741	if (r < 0)
2742	return r;
2743
2744	if (u < CGROUP_CPU_SHARES_MIN2UL \|\| u > CGROUP_CPU_SHARES_MAX262144UL)
2745	return -ERANGE34;
2746
2747	*ret = u;
2748	return 0;
2749	}
2750
2751	int cg_blkio_weight_parse(const char s, uint64_t ret) {
2752	uint64_t u;
2753	int r;
2754
2755	if (isempty(s)) {
2756	*ret = CGROUP_BLKIO_WEIGHT_INVALID((uint64_t) -1);
2757	return 0;
2758	}
2759
2760	r = safe_atou64(s, &u);
2761	if (r < 0)
2762	return r;
2763
2764	if (u < CGROUP_BLKIO_WEIGHT_MIN10UL \|\| u > CGROUP_BLKIO_WEIGHT_MAX1000UL)
2765	return -ERANGE34;
2766
2767	*ret = u;
2768	return 0;
2769	}
2770
2771	bool_Bool is_cgroup_fs(const struct statfs *s) {
2772	return is_fs_type(s, CGROUP_SUPER_MAGIC0x27e0eb) \|\|
2773	is_fs_type(s, CGROUP2_SUPER_MAGIC0x63677270);
2774	}
2775
2776	bool_Bool fd_is_cgroup_fs(int fd) {
2777	struct statfs s;
2778
2779	if (fstatfs(fd, &s) < 0)
2780	return -errno(*__errno_location ());
2781
2782	return is_cgroup_fs(&s);
2783	}
2784
2785	static const char *cgroup_controller_table[_CGROUP_CONTROLLER_MAX] = {
2786	[CGROUP_CONTROLLER_CPU] = "cpu",
2787	[CGROUP_CONTROLLER_CPUACCT] = "cpuacct",
2788	[CGROUP_CONTROLLER_CPUSET] = "cpuset",
2789	[CGROUP_CONTROLLER_IO] = "io",
2790	[CGROUP_CONTROLLER_BLKIO] = "blkio",
2791	[CGROUP_CONTROLLER_MEMORY] = "memory",
2792	[CGROUP_CONTROLLER_DEVICES] = "devices",
2793	[CGROUP_CONTROLLER_PIDS] = "pids",
2794	};
2795
2796	DEFINE_STRING_TABLE_LOOKUP(cgroup_controller, CGroupController)const char cgroup_controller_to_string(CGroupController i) { if (i < 0 \|\| i >= (CGroupController) __extension__ (__builtin_choose_expr ( !__builtin_types_compatible_p(typeof(cgroup_controller_table ), typeof(&(cgroup_controller_table))), sizeof(cgroup_controller_table )/sizeof((cgroup_controller_table)[0]), ((void)0)))) return ( (void)0); return cgroup_controller_table[i]; } CGroupController cgroup_controller_from_string(const char s) { return (CGroupController ) string_table_lookup(cgroup_controller_table, __extension__ ( __builtin_choose_expr( !__builtin_types_compatible_p(typeof(cgroup_controller_table ), typeof(&*(cgroup_controller_table))), sizeof(cgroup_controller_table )/sizeof((cgroup_controller_table)[0]), ((void)0))), s); };