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Commit | Line | Data |
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8e274523 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4ad49000 | 4 | Copyright 2013 Lennart Poettering |
8e274523 LP |
5 | |
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
8e274523 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
8e274523 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
8e274523 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
c6c18be3 | 20 | #include <fcntl.h> |
e41969e3 | 21 | #include <fnmatch.h> |
8c6db833 | 22 | |
b5efdb8a | 23 | #include "alloc-util.h" |
03a7b521 | 24 | #include "cgroup-util.h" |
3ffd4af2 LP |
25 | #include "cgroup.h" |
26 | #include "fd-util.h" | |
0d39fa9c | 27 | #include "fileio.h" |
77601719 | 28 | #include "fs-util.h" |
6bedfcbb | 29 | #include "parse-util.h" |
9eb977db | 30 | #include "path-util.h" |
03a7b521 | 31 | #include "process-util.h" |
9444b1f2 | 32 | #include "special.h" |
8b43440b | 33 | #include "string-table.h" |
07630cea | 34 | #include "string-util.h" |
13c31542 | 35 | #include "stdio-util.h" |
8e274523 | 36 | |
9a054909 LP |
37 | #define CGROUP_CPU_QUOTA_PERIOD_USEC ((usec_t) 100 * USEC_PER_MSEC) |
38 | ||
2b40998d | 39 | static void cgroup_compat_warn(void) { |
128fadc9 TH |
40 | static bool cgroup_compat_warned = false; |
41 | ||
42 | if (cgroup_compat_warned) | |
43 | return; | |
44 | ||
45 | log_warning("cgroup compatibility translation between legacy and unified hierarchy settings activated. See cgroup-compat debug messages for details."); | |
46 | cgroup_compat_warned = true; | |
47 | } | |
48 | ||
49 | #define log_cgroup_compat(unit, fmt, ...) do { \ | |
50 | cgroup_compat_warn(); \ | |
51 | log_unit_debug(unit, "cgroup-compat: " fmt, ##__VA_ARGS__); \ | |
2b40998d | 52 | } while (false) |
128fadc9 | 53 | |
4ad49000 LP |
54 | void cgroup_context_init(CGroupContext *c) { |
55 | assert(c); | |
56 | ||
57 | /* Initialize everything to the kernel defaults, assuming the | |
58 | * structure is preinitialized to 0 */ | |
59 | ||
66ebf6c0 TH |
60 | c->cpu_weight = CGROUP_WEIGHT_INVALID; |
61 | c->startup_cpu_weight = CGROUP_WEIGHT_INVALID; | |
62 | c->cpu_quota_per_sec_usec = USEC_INFINITY; | |
63 | ||
d53d9474 LP |
64 | c->cpu_shares = CGROUP_CPU_SHARES_INVALID; |
65 | c->startup_cpu_shares = CGROUP_CPU_SHARES_INVALID; | |
d53d9474 | 66 | |
da4d897e TH |
67 | c->memory_high = CGROUP_LIMIT_MAX; |
68 | c->memory_max = CGROUP_LIMIT_MAX; | |
69 | ||
70 | c->memory_limit = CGROUP_LIMIT_MAX; | |
b2f8b02e | 71 | |
13c31542 TH |
72 | c->io_weight = CGROUP_WEIGHT_INVALID; |
73 | c->startup_io_weight = CGROUP_WEIGHT_INVALID; | |
74 | ||
d53d9474 LP |
75 | c->blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID; |
76 | c->startup_blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID; | |
77 | ||
78 | c->tasks_max = (uint64_t) -1; | |
4ad49000 | 79 | } |
8e274523 | 80 | |
4ad49000 LP |
81 | void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a) { |
82 | assert(c); | |
83 | assert(a); | |
84 | ||
71fda00f | 85 | LIST_REMOVE(device_allow, c->device_allow, a); |
4ad49000 LP |
86 | free(a->path); |
87 | free(a); | |
88 | } | |
89 | ||
13c31542 TH |
90 | void cgroup_context_free_io_device_weight(CGroupContext *c, CGroupIODeviceWeight *w) { |
91 | assert(c); | |
92 | assert(w); | |
93 | ||
94 | LIST_REMOVE(device_weights, c->io_device_weights, w); | |
95 | free(w->path); | |
96 | free(w); | |
97 | } | |
98 | ||
99 | void cgroup_context_free_io_device_limit(CGroupContext *c, CGroupIODeviceLimit *l) { | |
100 | assert(c); | |
101 | assert(l); | |
102 | ||
103 | LIST_REMOVE(device_limits, c->io_device_limits, l); | |
104 | free(l->path); | |
105 | free(l); | |
106 | } | |
107 | ||
4ad49000 LP |
108 | void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w) { |
109 | assert(c); | |
110 | assert(w); | |
111 | ||
71fda00f | 112 | LIST_REMOVE(device_weights, c->blockio_device_weights, w); |
4ad49000 LP |
113 | free(w->path); |
114 | free(w); | |
115 | } | |
116 | ||
117 | void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b) { | |
118 | assert(c); | |
8e274523 | 119 | assert(b); |
8e274523 | 120 | |
71fda00f | 121 | LIST_REMOVE(device_bandwidths, c->blockio_device_bandwidths, b); |
4ad49000 LP |
122 | free(b->path); |
123 | free(b); | |
124 | } | |
125 | ||
126 | void cgroup_context_done(CGroupContext *c) { | |
127 | assert(c); | |
128 | ||
13c31542 TH |
129 | while (c->io_device_weights) |
130 | cgroup_context_free_io_device_weight(c, c->io_device_weights); | |
131 | ||
132 | while (c->io_device_limits) | |
133 | cgroup_context_free_io_device_limit(c, c->io_device_limits); | |
134 | ||
4ad49000 LP |
135 | while (c->blockio_device_weights) |
136 | cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights); | |
137 | ||
138 | while (c->blockio_device_bandwidths) | |
139 | cgroup_context_free_blockio_device_bandwidth(c, c->blockio_device_bandwidths); | |
140 | ||
141 | while (c->device_allow) | |
142 | cgroup_context_free_device_allow(c, c->device_allow); | |
143 | } | |
144 | ||
145 | void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) { | |
13c31542 TH |
146 | CGroupIODeviceLimit *il; |
147 | CGroupIODeviceWeight *iw; | |
4ad49000 LP |
148 | CGroupBlockIODeviceBandwidth *b; |
149 | CGroupBlockIODeviceWeight *w; | |
150 | CGroupDeviceAllow *a; | |
9a054909 | 151 | char u[FORMAT_TIMESPAN_MAX]; |
4ad49000 LP |
152 | |
153 | assert(c); | |
154 | assert(f); | |
155 | ||
156 | prefix = strempty(prefix); | |
157 | ||
158 | fprintf(f, | |
159 | "%sCPUAccounting=%s\n" | |
13c31542 | 160 | "%sIOAccounting=%s\n" |
4ad49000 LP |
161 | "%sBlockIOAccounting=%s\n" |
162 | "%sMemoryAccounting=%s\n" | |
d53d9474 | 163 | "%sTasksAccounting=%s\n" |
66ebf6c0 TH |
164 | "%sCPUWeight=%" PRIu64 "\n" |
165 | "%sStartupCPUWeight=%" PRIu64 "\n" | |
d53d9474 LP |
166 | "%sCPUShares=%" PRIu64 "\n" |
167 | "%sStartupCPUShares=%" PRIu64 "\n" | |
b2f8b02e | 168 | "%sCPUQuotaPerSecSec=%s\n" |
13c31542 TH |
169 | "%sIOWeight=%" PRIu64 "\n" |
170 | "%sStartupIOWeight=%" PRIu64 "\n" | |
d53d9474 LP |
171 | "%sBlockIOWeight=%" PRIu64 "\n" |
172 | "%sStartupBlockIOWeight=%" PRIu64 "\n" | |
da4d897e TH |
173 | "%sMemoryLow=%" PRIu64 "\n" |
174 | "%sMemoryHigh=%" PRIu64 "\n" | |
175 | "%sMemoryMax=%" PRIu64 "\n" | |
4ad49000 | 176 | "%sMemoryLimit=%" PRIu64 "\n" |
03a7b521 | 177 | "%sTasksMax=%" PRIu64 "\n" |
a931ad47 LP |
178 | "%sDevicePolicy=%s\n" |
179 | "%sDelegate=%s\n", | |
4ad49000 | 180 | prefix, yes_no(c->cpu_accounting), |
13c31542 | 181 | prefix, yes_no(c->io_accounting), |
4ad49000 LP |
182 | prefix, yes_no(c->blockio_accounting), |
183 | prefix, yes_no(c->memory_accounting), | |
d53d9474 | 184 | prefix, yes_no(c->tasks_accounting), |
66ebf6c0 TH |
185 | prefix, c->cpu_weight, |
186 | prefix, c->startup_cpu_weight, | |
4ad49000 | 187 | prefix, c->cpu_shares, |
95ae05c0 | 188 | prefix, c->startup_cpu_shares, |
b1d6dcf5 | 189 | prefix, format_timespan(u, sizeof(u), c->cpu_quota_per_sec_usec, 1), |
13c31542 TH |
190 | prefix, c->io_weight, |
191 | prefix, c->startup_io_weight, | |
4ad49000 | 192 | prefix, c->blockio_weight, |
95ae05c0 | 193 | prefix, c->startup_blockio_weight, |
da4d897e TH |
194 | prefix, c->memory_low, |
195 | prefix, c->memory_high, | |
196 | prefix, c->memory_max, | |
4ad49000 | 197 | prefix, c->memory_limit, |
03a7b521 | 198 | prefix, c->tasks_max, |
a931ad47 LP |
199 | prefix, cgroup_device_policy_to_string(c->device_policy), |
200 | prefix, yes_no(c->delegate)); | |
4ad49000 LP |
201 | |
202 | LIST_FOREACH(device_allow, a, c->device_allow) | |
203 | fprintf(f, | |
204 | "%sDeviceAllow=%s %s%s%s\n", | |
205 | prefix, | |
206 | a->path, | |
207 | a->r ? "r" : "", a->w ? "w" : "", a->m ? "m" : ""); | |
208 | ||
13c31542 TH |
209 | LIST_FOREACH(device_weights, iw, c->io_device_weights) |
210 | fprintf(f, | |
211 | "%sIODeviceWeight=%s %" PRIu64, | |
212 | prefix, | |
213 | iw->path, | |
214 | iw->weight); | |
215 | ||
216 | LIST_FOREACH(device_limits, il, c->io_device_limits) { | |
217 | char buf[FORMAT_BYTES_MAX]; | |
9be57249 TH |
218 | CGroupIOLimitType type; |
219 | ||
220 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) | |
221 | if (il->limits[type] != cgroup_io_limit_defaults[type]) | |
222 | fprintf(f, | |
223 | "%s%s=%s %s\n", | |
224 | prefix, | |
225 | cgroup_io_limit_type_to_string(type), | |
226 | il->path, | |
227 | format_bytes(buf, sizeof(buf), il->limits[type])); | |
13c31542 TH |
228 | } |
229 | ||
4ad49000 LP |
230 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) |
231 | fprintf(f, | |
d53d9474 | 232 | "%sBlockIODeviceWeight=%s %" PRIu64, |
4ad49000 LP |
233 | prefix, |
234 | w->path, | |
235 | w->weight); | |
236 | ||
237 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
238 | char buf[FORMAT_BYTES_MAX]; | |
239 | ||
979d0311 TH |
240 | if (b->rbps != CGROUP_LIMIT_MAX) |
241 | fprintf(f, | |
242 | "%sBlockIOReadBandwidth=%s %s\n", | |
243 | prefix, | |
244 | b->path, | |
245 | format_bytes(buf, sizeof(buf), b->rbps)); | |
246 | if (b->wbps != CGROUP_LIMIT_MAX) | |
247 | fprintf(f, | |
248 | "%sBlockIOWriteBandwidth=%s %s\n", | |
249 | prefix, | |
250 | b->path, | |
251 | format_bytes(buf, sizeof(buf), b->wbps)); | |
4ad49000 LP |
252 | } |
253 | } | |
254 | ||
13c31542 | 255 | static int lookup_block_device(const char *p, dev_t *dev) { |
4ad49000 LP |
256 | struct stat st; |
257 | int r; | |
258 | ||
259 | assert(p); | |
260 | assert(dev); | |
261 | ||
262 | r = stat(p, &st); | |
4a62c710 MS |
263 | if (r < 0) |
264 | return log_warning_errno(errno, "Couldn't stat device %s: %m", p); | |
8e274523 | 265 | |
4ad49000 LP |
266 | if (S_ISBLK(st.st_mode)) |
267 | *dev = st.st_rdev; | |
268 | else if (major(st.st_dev) != 0) { | |
269 | /* If this is not a device node then find the block | |
270 | * device this file is stored on */ | |
271 | *dev = st.st_dev; | |
272 | ||
273 | /* If this is a partition, try to get the originating | |
274 | * block device */ | |
275 | block_get_whole_disk(*dev, dev); | |
276 | } else { | |
277 | log_warning("%s is not a block device and file system block device cannot be determined or is not local.", p); | |
278 | return -ENODEV; | |
279 | } | |
8e274523 | 280 | |
8e274523 | 281 | return 0; |
8e274523 LP |
282 | } |
283 | ||
4ad49000 LP |
284 | static int whitelist_device(const char *path, const char *node, const char *acc) { |
285 | char buf[2+DECIMAL_STR_MAX(dev_t)*2+2+4]; | |
286 | struct stat st; | |
8c6db833 | 287 | int r; |
8e274523 | 288 | |
4ad49000 LP |
289 | assert(path); |
290 | assert(acc); | |
8e274523 | 291 | |
4ad49000 LP |
292 | if (stat(node, &st) < 0) { |
293 | log_warning("Couldn't stat device %s", node); | |
294 | return -errno; | |
295 | } | |
296 | ||
297 | if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { | |
298 | log_warning("%s is not a device.", node); | |
299 | return -ENODEV; | |
300 | } | |
301 | ||
302 | sprintf(buf, | |
303 | "%c %u:%u %s", | |
304 | S_ISCHR(st.st_mode) ? 'c' : 'b', | |
305 | major(st.st_rdev), minor(st.st_rdev), | |
306 | acc); | |
307 | ||
308 | r = cg_set_attribute("devices", path, "devices.allow", buf); | |
1aeab12b | 309 | if (r < 0) |
077ba06e | 310 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
714e2e1d | 311 | "Failed to set devices.allow on %s: %m", path); |
4ad49000 LP |
312 | |
313 | return r; | |
8e274523 LP |
314 | } |
315 | ||
90060676 LP |
316 | static int whitelist_major(const char *path, const char *name, char type, const char *acc) { |
317 | _cleanup_fclose_ FILE *f = NULL; | |
318 | char line[LINE_MAX]; | |
319 | bool good = false; | |
320 | int r; | |
321 | ||
322 | assert(path); | |
323 | assert(acc); | |
324 | assert(type == 'b' || type == 'c'); | |
325 | ||
326 | f = fopen("/proc/devices", "re"); | |
4a62c710 MS |
327 | if (!f) |
328 | return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s (%c): %m", name, type); | |
90060676 LP |
329 | |
330 | FOREACH_LINE(line, f, goto fail) { | |
331 | char buf[2+DECIMAL_STR_MAX(unsigned)+3+4], *p, *w; | |
332 | unsigned maj; | |
333 | ||
334 | truncate_nl(line); | |
335 | ||
336 | if (type == 'c' && streq(line, "Character devices:")) { | |
337 | good = true; | |
338 | continue; | |
339 | } | |
340 | ||
341 | if (type == 'b' && streq(line, "Block devices:")) { | |
342 | good = true; | |
343 | continue; | |
344 | } | |
345 | ||
346 | if (isempty(line)) { | |
347 | good = false; | |
348 | continue; | |
349 | } | |
350 | ||
351 | if (!good) | |
352 | continue; | |
353 | ||
354 | p = strstrip(line); | |
355 | ||
356 | w = strpbrk(p, WHITESPACE); | |
357 | if (!w) | |
358 | continue; | |
359 | *w = 0; | |
360 | ||
361 | r = safe_atou(p, &maj); | |
362 | if (r < 0) | |
363 | continue; | |
364 | if (maj <= 0) | |
365 | continue; | |
366 | ||
367 | w++; | |
368 | w += strspn(w, WHITESPACE); | |
e41969e3 LP |
369 | |
370 | if (fnmatch(name, w, 0) != 0) | |
90060676 LP |
371 | continue; |
372 | ||
373 | sprintf(buf, | |
374 | "%c %u:* %s", | |
375 | type, | |
376 | maj, | |
377 | acc); | |
378 | ||
379 | r = cg_set_attribute("devices", path, "devices.allow", buf); | |
1aeab12b | 380 | if (r < 0) |
077ba06e | 381 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
714e2e1d | 382 | "Failed to set devices.allow on %s: %m", path); |
90060676 LP |
383 | } |
384 | ||
385 | return 0; | |
386 | ||
387 | fail: | |
56f64d95 | 388 | log_warning_errno(errno, "Failed to read /proc/devices: %m"); |
90060676 LP |
389 | return -errno; |
390 | } | |
391 | ||
66ebf6c0 TH |
392 | static bool cgroup_context_has_cpu_weight(CGroupContext *c) { |
393 | return c->cpu_weight != CGROUP_WEIGHT_INVALID || | |
394 | c->startup_cpu_weight != CGROUP_WEIGHT_INVALID; | |
395 | } | |
396 | ||
397 | static bool cgroup_context_has_cpu_shares(CGroupContext *c) { | |
398 | return c->cpu_shares != CGROUP_CPU_SHARES_INVALID || | |
399 | c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID; | |
400 | } | |
401 | ||
402 | static uint64_t cgroup_context_cpu_weight(CGroupContext *c, ManagerState state) { | |
403 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && | |
404 | c->startup_cpu_weight != CGROUP_WEIGHT_INVALID) | |
405 | return c->startup_cpu_weight; | |
406 | else if (c->cpu_weight != CGROUP_WEIGHT_INVALID) | |
407 | return c->cpu_weight; | |
408 | else | |
409 | return CGROUP_WEIGHT_DEFAULT; | |
410 | } | |
411 | ||
412 | static uint64_t cgroup_context_cpu_shares(CGroupContext *c, ManagerState state) { | |
413 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && | |
414 | c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID) | |
415 | return c->startup_cpu_shares; | |
416 | else if (c->cpu_shares != CGROUP_CPU_SHARES_INVALID) | |
417 | return c->cpu_shares; | |
418 | else | |
419 | return CGROUP_CPU_SHARES_DEFAULT; | |
420 | } | |
421 | ||
422 | static void cgroup_apply_unified_cpu_config(Unit *u, uint64_t weight, uint64_t quota) { | |
423 | char buf[MAX(DECIMAL_STR_MAX(uint64_t) + 1, (DECIMAL_STR_MAX(usec_t) + 1) * 2)]; | |
424 | int r; | |
425 | ||
426 | xsprintf(buf, "%" PRIu64 "\n", weight); | |
427 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.weight", buf); | |
428 | if (r < 0) | |
429 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, | |
430 | "Failed to set cpu.weight: %m"); | |
431 | ||
432 | if (quota != USEC_INFINITY) | |
433 | xsprintf(buf, USEC_FMT " " USEC_FMT "\n", | |
434 | quota * CGROUP_CPU_QUOTA_PERIOD_USEC / USEC_PER_SEC, CGROUP_CPU_QUOTA_PERIOD_USEC); | |
435 | else | |
436 | xsprintf(buf, "max " USEC_FMT "\n", CGROUP_CPU_QUOTA_PERIOD_USEC); | |
437 | ||
438 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.max", buf); | |
439 | ||
440 | if (r < 0) | |
441 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, | |
442 | "Failed to set cpu.max: %m"); | |
443 | } | |
444 | ||
445 | static void cgroup_apply_legacy_cpu_config(Unit *u, uint64_t shares, uint64_t quota) { | |
446 | char buf[MAX(DECIMAL_STR_MAX(uint64_t), DECIMAL_STR_MAX(usec_t)) + 1]; | |
447 | int r; | |
448 | ||
449 | xsprintf(buf, "%" PRIu64 "\n", shares); | |
450 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.shares", buf); | |
451 | if (r < 0) | |
452 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, | |
453 | "Failed to set cpu.shares: %m"); | |
454 | ||
455 | xsprintf(buf, USEC_FMT "\n", CGROUP_CPU_QUOTA_PERIOD_USEC); | |
456 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.cfs_period_us", buf); | |
457 | if (r < 0) | |
458 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, | |
459 | "Failed to set cpu.cfs_period_us: %m"); | |
460 | ||
461 | if (quota != USEC_INFINITY) { | |
462 | xsprintf(buf, USEC_FMT "\n", quota * CGROUP_CPU_QUOTA_PERIOD_USEC / USEC_PER_SEC); | |
463 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.cfs_quota_us", buf); | |
464 | } else | |
465 | r = cg_set_attribute("cpu", u->cgroup_path, "cpu.cfs_quota_us", "-1"); | |
466 | if (r < 0) | |
467 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, | |
468 | "Failed to set cpu.cfs_quota_us: %m"); | |
469 | } | |
470 | ||
471 | static uint64_t cgroup_cpu_shares_to_weight(uint64_t shares) { | |
472 | return CLAMP(shares * CGROUP_WEIGHT_DEFAULT / CGROUP_CPU_SHARES_DEFAULT, | |
473 | CGROUP_WEIGHT_MIN, CGROUP_WEIGHT_MAX); | |
474 | } | |
475 | ||
476 | static uint64_t cgroup_cpu_weight_to_shares(uint64_t weight) { | |
477 | return CLAMP(weight * CGROUP_CPU_SHARES_DEFAULT / CGROUP_WEIGHT_DEFAULT, | |
478 | CGROUP_CPU_SHARES_MIN, CGROUP_CPU_SHARES_MAX); | |
479 | } | |
480 | ||
508c45da | 481 | static bool cgroup_context_has_io_config(CGroupContext *c) { |
538b4852 TH |
482 | return c->io_accounting || |
483 | c->io_weight != CGROUP_WEIGHT_INVALID || | |
484 | c->startup_io_weight != CGROUP_WEIGHT_INVALID || | |
485 | c->io_device_weights || | |
486 | c->io_device_limits; | |
487 | } | |
488 | ||
508c45da | 489 | static bool cgroup_context_has_blockio_config(CGroupContext *c) { |
538b4852 TH |
490 | return c->blockio_accounting || |
491 | c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || | |
492 | c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || | |
493 | c->blockio_device_weights || | |
494 | c->blockio_device_bandwidths; | |
495 | } | |
496 | ||
508c45da | 497 | static uint64_t cgroup_context_io_weight(CGroupContext *c, ManagerState state) { |
64faf04c TH |
498 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && |
499 | c->startup_io_weight != CGROUP_WEIGHT_INVALID) | |
500 | return c->startup_io_weight; | |
501 | else if (c->io_weight != CGROUP_WEIGHT_INVALID) | |
502 | return c->io_weight; | |
503 | else | |
504 | return CGROUP_WEIGHT_DEFAULT; | |
505 | } | |
506 | ||
508c45da | 507 | static uint64_t cgroup_context_blkio_weight(CGroupContext *c, ManagerState state) { |
64faf04c TH |
508 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && |
509 | c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID) | |
510 | return c->startup_blockio_weight; | |
511 | else if (c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID) | |
512 | return c->blockio_weight; | |
513 | else | |
514 | return CGROUP_BLKIO_WEIGHT_DEFAULT; | |
515 | } | |
516 | ||
508c45da | 517 | static uint64_t cgroup_weight_blkio_to_io(uint64_t blkio_weight) { |
538b4852 TH |
518 | return CLAMP(blkio_weight * CGROUP_WEIGHT_DEFAULT / CGROUP_BLKIO_WEIGHT_DEFAULT, |
519 | CGROUP_WEIGHT_MIN, CGROUP_WEIGHT_MAX); | |
520 | } | |
521 | ||
508c45da | 522 | static uint64_t cgroup_weight_io_to_blkio(uint64_t io_weight) { |
538b4852 TH |
523 | return CLAMP(io_weight * CGROUP_BLKIO_WEIGHT_DEFAULT / CGROUP_WEIGHT_DEFAULT, |
524 | CGROUP_BLKIO_WEIGHT_MIN, CGROUP_BLKIO_WEIGHT_MAX); | |
525 | } | |
526 | ||
f29ff115 | 527 | static void cgroup_apply_io_device_weight(Unit *u, const char *dev_path, uint64_t io_weight) { |
64faf04c TH |
528 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
529 | dev_t dev; | |
530 | int r; | |
531 | ||
532 | r = lookup_block_device(dev_path, &dev); | |
533 | if (r < 0) | |
534 | return; | |
535 | ||
536 | xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), io_weight); | |
f29ff115 | 537 | r = cg_set_attribute("io", u->cgroup_path, "io.weight", buf); |
64faf04c | 538 | if (r < 0) |
f29ff115 TH |
539 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
540 | "Failed to set io.weight: %m"); | |
64faf04c TH |
541 | } |
542 | ||
f29ff115 | 543 | static void cgroup_apply_blkio_device_weight(Unit *u, const char *dev_path, uint64_t blkio_weight) { |
64faf04c TH |
544 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
545 | dev_t dev; | |
546 | int r; | |
547 | ||
548 | r = lookup_block_device(dev_path, &dev); | |
549 | if (r < 0) | |
550 | return; | |
551 | ||
552 | xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), blkio_weight); | |
f29ff115 | 553 | r = cg_set_attribute("blkio", u->cgroup_path, "blkio.weight_device", buf); |
64faf04c | 554 | if (r < 0) |
f29ff115 TH |
555 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
556 | "Failed to set blkio.weight_device: %m"); | |
64faf04c TH |
557 | } |
558 | ||
f29ff115 | 559 | static unsigned cgroup_apply_io_device_limit(Unit *u, const char *dev_path, uint64_t *limits) { |
64faf04c TH |
560 | char limit_bufs[_CGROUP_IO_LIMIT_TYPE_MAX][DECIMAL_STR_MAX(uint64_t)]; |
561 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+(6+DECIMAL_STR_MAX(uint64_t)+1)*4]; | |
562 | CGroupIOLimitType type; | |
563 | dev_t dev; | |
564 | unsigned n = 0; | |
565 | int r; | |
566 | ||
567 | r = lookup_block_device(dev_path, &dev); | |
568 | if (r < 0) | |
569 | return 0; | |
570 | ||
571 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) { | |
572 | if (limits[type] != cgroup_io_limit_defaults[type]) { | |
573 | xsprintf(limit_bufs[type], "%" PRIu64, limits[type]); | |
574 | n++; | |
575 | } else { | |
576 | xsprintf(limit_bufs[type], "%s", limits[type] == CGROUP_LIMIT_MAX ? "max" : "0"); | |
577 | } | |
578 | } | |
579 | ||
580 | xsprintf(buf, "%u:%u rbps=%s wbps=%s riops=%s wiops=%s\n", major(dev), minor(dev), | |
581 | limit_bufs[CGROUP_IO_RBPS_MAX], limit_bufs[CGROUP_IO_WBPS_MAX], | |
582 | limit_bufs[CGROUP_IO_RIOPS_MAX], limit_bufs[CGROUP_IO_WIOPS_MAX]); | |
f29ff115 | 583 | r = cg_set_attribute("io", u->cgroup_path, "io.max", buf); |
64faf04c | 584 | if (r < 0) |
f29ff115 TH |
585 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
586 | "Failed to set io.max: %m"); | |
64faf04c TH |
587 | return n; |
588 | } | |
589 | ||
f29ff115 | 590 | static unsigned cgroup_apply_blkio_device_limit(Unit *u, const char *dev_path, uint64_t rbps, uint64_t wbps) { |
64faf04c TH |
591 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
592 | dev_t dev; | |
593 | unsigned n = 0; | |
594 | int r; | |
595 | ||
596 | r = lookup_block_device(dev_path, &dev); | |
597 | if (r < 0) | |
598 | return 0; | |
599 | ||
600 | if (rbps != CGROUP_LIMIT_MAX) | |
601 | n++; | |
602 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), rbps); | |
f29ff115 | 603 | r = cg_set_attribute("blkio", u->cgroup_path, "blkio.throttle.read_bps_device", buf); |
64faf04c | 604 | if (r < 0) |
f29ff115 TH |
605 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
606 | "Failed to set blkio.throttle.read_bps_device: %m"); | |
64faf04c TH |
607 | |
608 | if (wbps != CGROUP_LIMIT_MAX) | |
609 | n++; | |
610 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), wbps); | |
f29ff115 | 611 | r = cg_set_attribute("blkio", u->cgroup_path, "blkio.throttle.write_bps_device", buf); |
64faf04c | 612 | if (r < 0) |
f29ff115 TH |
613 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
614 | "Failed to set blkio.throttle.write_bps_device: %m"); | |
64faf04c TH |
615 | |
616 | return n; | |
617 | } | |
618 | ||
da4d897e TH |
619 | static bool cgroup_context_has_unified_memory_config(CGroupContext *c) { |
620 | return c->memory_low > 0 || c->memory_high != CGROUP_LIMIT_MAX || c->memory_max != CGROUP_LIMIT_MAX; | |
621 | } | |
622 | ||
f29ff115 | 623 | static void cgroup_apply_unified_memory_limit(Unit *u, const char *file, uint64_t v) { |
da4d897e TH |
624 | char buf[DECIMAL_STR_MAX(uint64_t) + 1] = "max"; |
625 | int r; | |
626 | ||
627 | if (v != CGROUP_LIMIT_MAX) | |
628 | xsprintf(buf, "%" PRIu64 "\n", v); | |
629 | ||
f29ff115 | 630 | r = cg_set_attribute("memory", u->cgroup_path, file, buf); |
da4d897e | 631 | if (r < 0) |
f29ff115 TH |
632 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
633 | "Failed to set %s: %m", file); | |
da4d897e TH |
634 | } |
635 | ||
f29ff115 TH |
636 | static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) { |
637 | const char *path; | |
638 | CGroupContext *c; | |
01efdf13 | 639 | bool is_root; |
4ad49000 LP |
640 | int r; |
641 | ||
f29ff115 TH |
642 | assert(u); |
643 | ||
644 | c = unit_get_cgroup_context(u); | |
645 | path = u->cgroup_path; | |
646 | ||
4ad49000 LP |
647 | assert(c); |
648 | assert(path); | |
8e274523 | 649 | |
4ad49000 LP |
650 | if (mask == 0) |
651 | return; | |
8e274523 | 652 | |
71c26873 | 653 | /* Some cgroup attributes are not supported on the root cgroup, |
01efdf13 LP |
654 | * hence silently ignore */ |
655 | is_root = isempty(path) || path_equal(path, "/"); | |
6da13913 ZJS |
656 | if (is_root) |
657 | /* Make sure we don't try to display messages with an empty path. */ | |
658 | path = "/"; | |
01efdf13 | 659 | |
714e2e1d LP |
660 | /* We generally ignore errors caused by read-only mounted |
661 | * cgroup trees (assuming we are running in a container then), | |
662 | * and missing cgroups, i.e. EROFS and ENOENT. */ | |
663 | ||
efdb0237 | 664 | if ((mask & CGROUP_MASK_CPU) && !is_root) { |
66ebf6c0 TH |
665 | bool has_weight = cgroup_context_has_cpu_weight(c); |
666 | bool has_shares = cgroup_context_has_cpu_shares(c); | |
8e274523 | 667 | |
ca2f6384 | 668 | if (cg_all_unified() > 0) { |
66ebf6c0 | 669 | uint64_t weight; |
b2f8b02e | 670 | |
66ebf6c0 TH |
671 | if (has_weight) |
672 | weight = cgroup_context_cpu_weight(c, state); | |
673 | else if (has_shares) { | |
674 | uint64_t shares = cgroup_context_cpu_shares(c, state); | |
b2f8b02e | 675 | |
66ebf6c0 TH |
676 | weight = cgroup_cpu_shares_to_weight(shares); |
677 | ||
678 | log_cgroup_compat(u, "Applying [Startup]CpuShares %" PRIu64 " as [Startup]CpuWeight %" PRIu64 " on %s", | |
679 | shares, weight, path); | |
680 | } else | |
681 | weight = CGROUP_WEIGHT_DEFAULT; | |
682 | ||
683 | cgroup_apply_unified_cpu_config(u, weight, c->cpu_quota_per_sec_usec); | |
684 | } else { | |
685 | uint64_t shares; | |
686 | ||
687 | if (has_shares) | |
688 | shares = cgroup_context_cpu_shares(c, state); | |
689 | else if (has_weight) { | |
690 | uint64_t weight = cgroup_context_cpu_weight(c, state); | |
691 | ||
692 | shares = cgroup_cpu_weight_to_shares(weight); | |
693 | ||
694 | log_cgroup_compat(u, "Applying [Startup]CpuWeight %" PRIu64 " as [Startup]CpuShares %" PRIu64 " on %s", | |
695 | weight, shares, path); | |
696 | } else | |
697 | shares = CGROUP_CPU_SHARES_DEFAULT; | |
698 | ||
699 | cgroup_apply_legacy_cpu_config(u, shares, c->cpu_quota_per_sec_usec); | |
700 | } | |
4ad49000 LP |
701 | } |
702 | ||
13c31542 | 703 | if (mask & CGROUP_MASK_IO) { |
538b4852 TH |
704 | bool has_io = cgroup_context_has_io_config(c); |
705 | bool has_blockio = cgroup_context_has_blockio_config(c); | |
13c31542 TH |
706 | |
707 | if (!is_root) { | |
64faf04c TH |
708 | char buf[8+DECIMAL_STR_MAX(uint64_t)+1]; |
709 | uint64_t weight; | |
13c31542 | 710 | |
538b4852 TH |
711 | if (has_io) |
712 | weight = cgroup_context_io_weight(c, state); | |
128fadc9 TH |
713 | else if (has_blockio) { |
714 | uint64_t blkio_weight = cgroup_context_blkio_weight(c, state); | |
715 | ||
716 | weight = cgroup_weight_blkio_to_io(blkio_weight); | |
717 | ||
718 | log_cgroup_compat(u, "Applying [Startup]BlockIOWeight %" PRIu64 " as [Startup]IOWeight %" PRIu64, | |
719 | blkio_weight, weight); | |
720 | } else | |
538b4852 | 721 | weight = CGROUP_WEIGHT_DEFAULT; |
13c31542 TH |
722 | |
723 | xsprintf(buf, "default %" PRIu64 "\n", weight); | |
724 | r = cg_set_attribute("io", path, "io.weight", buf); | |
725 | if (r < 0) | |
f29ff115 TH |
726 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
727 | "Failed to set io.weight: %m"); | |
13c31542 | 728 | |
538b4852 TH |
729 | if (has_io) { |
730 | CGroupIODeviceWeight *w; | |
731 | ||
732 | /* FIXME: no way to reset this list */ | |
733 | LIST_FOREACH(device_weights, w, c->io_device_weights) | |
f29ff115 | 734 | cgroup_apply_io_device_weight(u, w->path, w->weight); |
538b4852 TH |
735 | } else if (has_blockio) { |
736 | CGroupBlockIODeviceWeight *w; | |
737 | ||
738 | /* FIXME: no way to reset this list */ | |
128fadc9 TH |
739 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) { |
740 | weight = cgroup_weight_blkio_to_io(w->weight); | |
741 | ||
742 | log_cgroup_compat(u, "Applying BlockIODeviceWeight %" PRIu64 " as IODeviceWeight %" PRIu64 " for %s", | |
743 | w->weight, weight, w->path); | |
744 | ||
745 | cgroup_apply_io_device_weight(u, w->path, weight); | |
746 | } | |
538b4852 | 747 | } |
13c31542 TH |
748 | } |
749 | ||
64faf04c | 750 | /* Apply limits and free ones without config. */ |
538b4852 TH |
751 | if (has_io) { |
752 | CGroupIODeviceLimit *l, *next; | |
753 | ||
754 | LIST_FOREACH_SAFE(device_limits, l, next, c->io_device_limits) { | |
f29ff115 | 755 | if (!cgroup_apply_io_device_limit(u, l->path, l->limits)) |
538b4852 TH |
756 | cgroup_context_free_io_device_limit(c, l); |
757 | } | |
758 | } else if (has_blockio) { | |
759 | CGroupBlockIODeviceBandwidth *b, *next; | |
760 | ||
761 | LIST_FOREACH_SAFE(device_bandwidths, b, next, c->blockio_device_bandwidths) { | |
762 | uint64_t limits[_CGROUP_IO_LIMIT_TYPE_MAX]; | |
763 | CGroupIOLimitType type; | |
764 | ||
765 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) | |
766 | limits[type] = cgroup_io_limit_defaults[type]; | |
767 | ||
768 | limits[CGROUP_IO_RBPS_MAX] = b->rbps; | |
769 | limits[CGROUP_IO_WBPS_MAX] = b->wbps; | |
770 | ||
128fadc9 TH |
771 | log_cgroup_compat(u, "Applying BlockIO{Read|Write}Bandwidth %" PRIu64 " %" PRIu64 " as IO{Read|Write}BandwidthMax for %s", |
772 | b->rbps, b->wbps, b->path); | |
773 | ||
f29ff115 | 774 | if (!cgroup_apply_io_device_limit(u, b->path, limits)) |
538b4852 TH |
775 | cgroup_context_free_blockio_device_bandwidth(c, b); |
776 | } | |
13c31542 TH |
777 | } |
778 | } | |
779 | ||
efdb0237 | 780 | if (mask & CGROUP_MASK_BLKIO) { |
538b4852 TH |
781 | bool has_io = cgroup_context_has_io_config(c); |
782 | bool has_blockio = cgroup_context_has_blockio_config(c); | |
4ad49000 | 783 | |
01efdf13 | 784 | if (!is_root) { |
64faf04c TH |
785 | char buf[DECIMAL_STR_MAX(uint64_t)+1]; |
786 | uint64_t weight; | |
64faf04c | 787 | |
538b4852 TH |
788 | if (has_blockio) |
789 | weight = cgroup_context_blkio_weight(c, state); | |
128fadc9 TH |
790 | else if (has_io) { |
791 | uint64_t io_weight = cgroup_context_io_weight(c, state); | |
792 | ||
538b4852 | 793 | weight = cgroup_weight_io_to_blkio(cgroup_context_io_weight(c, state)); |
128fadc9 TH |
794 | |
795 | log_cgroup_compat(u, "Applying [Startup]IOWeight %" PRIu64 " as [Startup]BlockIOWeight %" PRIu64, | |
796 | io_weight, weight); | |
797 | } else | |
538b4852 | 798 | weight = CGROUP_BLKIO_WEIGHT_DEFAULT; |
64faf04c TH |
799 | |
800 | xsprintf(buf, "%" PRIu64 "\n", weight); | |
01efdf13 | 801 | r = cg_set_attribute("blkio", path, "blkio.weight", buf); |
1aeab12b | 802 | if (r < 0) |
f29ff115 TH |
803 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
804 | "Failed to set blkio.weight: %m"); | |
4ad49000 | 805 | |
538b4852 TH |
806 | if (has_blockio) { |
807 | CGroupBlockIODeviceWeight *w; | |
808 | ||
809 | /* FIXME: no way to reset this list */ | |
810 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) | |
f29ff115 | 811 | cgroup_apply_blkio_device_weight(u, w->path, w->weight); |
538b4852 TH |
812 | } else if (has_io) { |
813 | CGroupIODeviceWeight *w; | |
814 | ||
815 | /* FIXME: no way to reset this list */ | |
128fadc9 TH |
816 | LIST_FOREACH(device_weights, w, c->io_device_weights) { |
817 | weight = cgroup_weight_io_to_blkio(w->weight); | |
818 | ||
819 | log_cgroup_compat(u, "Applying IODeviceWeight %" PRIu64 " as BlockIODeviceWeight %" PRIu64 " for %s", | |
820 | w->weight, weight, w->path); | |
821 | ||
822 | cgroup_apply_blkio_device_weight(u, w->path, weight); | |
823 | } | |
538b4852 | 824 | } |
4ad49000 LP |
825 | } |
826 | ||
64faf04c | 827 | /* Apply limits and free ones without config. */ |
538b4852 TH |
828 | if (has_blockio) { |
829 | CGroupBlockIODeviceBandwidth *b, *next; | |
830 | ||
831 | LIST_FOREACH_SAFE(device_bandwidths, b, next, c->blockio_device_bandwidths) { | |
f29ff115 | 832 | if (!cgroup_apply_blkio_device_limit(u, b->path, b->rbps, b->wbps)) |
538b4852 TH |
833 | cgroup_context_free_blockio_device_bandwidth(c, b); |
834 | } | |
835 | } else if (has_io) { | |
836 | CGroupIODeviceLimit *l, *next; | |
837 | ||
838 | LIST_FOREACH_SAFE(device_limits, l, next, c->io_device_limits) { | |
128fadc9 TH |
839 | log_cgroup_compat(u, "Applying IO{Read|Write}Bandwidth %" PRIu64 " %" PRIu64 " as BlockIO{Read|Write}BandwidthMax for %s", |
840 | l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX], l->path); | |
841 | ||
f29ff115 | 842 | if (!cgroup_apply_blkio_device_limit(u, l->path, l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX])) |
538b4852 TH |
843 | cgroup_context_free_io_device_limit(c, l); |
844 | } | |
d686d8a9 | 845 | } |
8e274523 LP |
846 | } |
847 | ||
efdb0237 | 848 | if ((mask & CGROUP_MASK_MEMORY) && !is_root) { |
ca2f6384 | 849 | if (cg_all_unified() > 0) { |
da4d897e | 850 | uint64_t max = c->memory_max; |
efdb0237 | 851 | |
da4d897e TH |
852 | if (cgroup_context_has_unified_memory_config(c)) |
853 | max = c->memory_max; | |
128fadc9 | 854 | else { |
da4d897e | 855 | max = c->memory_limit; |
efdb0237 | 856 | |
128fadc9 TH |
857 | if (max != CGROUP_LIMIT_MAX) |
858 | log_cgroup_compat(u, "Applying MemoryLimit %" PRIu64 " as MemoryMax", max); | |
859 | } | |
860 | ||
f29ff115 TH |
861 | cgroup_apply_unified_memory_limit(u, "memory.low", c->memory_low); |
862 | cgroup_apply_unified_memory_limit(u, "memory.high", c->memory_high); | |
863 | cgroup_apply_unified_memory_limit(u, "memory.max", max); | |
efdb0237 | 864 | } else { |
da4d897e | 865 | char buf[DECIMAL_STR_MAX(uint64_t) + 1]; |
78a4ee59 | 866 | uint64_t val = c->memory_limit; |
da4d897e | 867 | |
78a4ee59 DM |
868 | if (val == CGROUP_LIMIT_MAX) { |
869 | val = c->memory_max; | |
8e274523 | 870 | |
78a4ee59 DM |
871 | if (val != CGROUP_LIMIT_MAX) |
872 | log_cgroup_compat(u, "Applying MemoryMax %" PRIi64 " as MemoryLimit", c->memory_max); | |
128fadc9 TH |
873 | } |
874 | ||
78a4ee59 DM |
875 | if (val == CGROUP_LIMIT_MAX) |
876 | strncpy(buf, "-1\n", sizeof(buf)); | |
877 | else | |
878 | xsprintf(buf, "%" PRIu64 "\n", val); | |
879 | ||
da4d897e TH |
880 | r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf); |
881 | if (r < 0) | |
f29ff115 TH |
882 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
883 | "Failed to set memory.limit_in_bytes: %m"); | |
da4d897e | 884 | } |
4ad49000 | 885 | } |
8e274523 | 886 | |
3905f127 | 887 | if ((mask & CGROUP_MASK_DEVICES) && !is_root) { |
4ad49000 | 888 | CGroupDeviceAllow *a; |
8e274523 | 889 | |
714e2e1d LP |
890 | /* Changing the devices list of a populated cgroup |
891 | * might result in EINVAL, hence ignore EINVAL | |
892 | * here. */ | |
893 | ||
4ad49000 LP |
894 | if (c->device_allow || c->device_policy != CGROUP_AUTO) |
895 | r = cg_set_attribute("devices", path, "devices.deny", "a"); | |
896 | else | |
897 | r = cg_set_attribute("devices", path, "devices.allow", "a"); | |
1aeab12b | 898 | if (r < 0) |
f29ff115 TH |
899 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
900 | "Failed to reset devices.list: %m"); | |
fb385181 | 901 | |
4ad49000 LP |
902 | if (c->device_policy == CGROUP_CLOSED || |
903 | (c->device_policy == CGROUP_AUTO && c->device_allow)) { | |
904 | static const char auto_devices[] = | |
7d711efb LP |
905 | "/dev/null\0" "rwm\0" |
906 | "/dev/zero\0" "rwm\0" | |
907 | "/dev/full\0" "rwm\0" | |
908 | "/dev/random\0" "rwm\0" | |
909 | "/dev/urandom\0" "rwm\0" | |
910 | "/dev/tty\0" "rwm\0" | |
0d9e7991 AP |
911 | "/dev/pts/ptmx\0" "rw\0" /* /dev/pts/ptmx may not be duplicated, but accessed */ |
912 | /* Allow /run/systemd/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */ | |
913 | "/run/systemd/inaccessible/chr\0" "rwm\0" | |
914 | "/run/systemd/inaccessible/blk\0" "rwm\0"; | |
4ad49000 LP |
915 | |
916 | const char *x, *y; | |
917 | ||
918 | NULSTR_FOREACH_PAIR(x, y, auto_devices) | |
919 | whitelist_device(path, x, y); | |
7d711efb LP |
920 | |
921 | whitelist_major(path, "pts", 'c', "rw"); | |
922 | whitelist_major(path, "kdbus", 'c', "rw"); | |
923 | whitelist_major(path, "kdbus/*", 'c', "rw"); | |
4ad49000 LP |
924 | } |
925 | ||
926 | LIST_FOREACH(device_allow, a, c->device_allow) { | |
927 | char acc[4]; | |
928 | unsigned k = 0; | |
929 | ||
930 | if (a->r) | |
931 | acc[k++] = 'r'; | |
932 | if (a->w) | |
933 | acc[k++] = 'w'; | |
934 | if (a->m) | |
935 | acc[k++] = 'm'; | |
fb385181 | 936 | |
4ad49000 LP |
937 | if (k == 0) |
938 | continue; | |
fb385181 | 939 | |
4ad49000 | 940 | acc[k++] = 0; |
90060676 LP |
941 | |
942 | if (startswith(a->path, "/dev/")) | |
943 | whitelist_device(path, a->path, acc); | |
944 | else if (startswith(a->path, "block-")) | |
945 | whitelist_major(path, a->path + 6, 'b', acc); | |
946 | else if (startswith(a->path, "char-")) | |
947 | whitelist_major(path, a->path + 5, 'c', acc); | |
948 | else | |
f29ff115 | 949 | log_unit_debug(u, "Ignoring device %s while writing cgroup attribute.", a->path); |
4ad49000 LP |
950 | } |
951 | } | |
03a7b521 LP |
952 | |
953 | if ((mask & CGROUP_MASK_PIDS) && !is_root) { | |
954 | ||
f5058264 | 955 | if (c->tasks_max != CGROUP_LIMIT_MAX) { |
03a7b521 LP |
956 | char buf[DECIMAL_STR_MAX(uint64_t) + 2]; |
957 | ||
958 | sprintf(buf, "%" PRIu64 "\n", c->tasks_max); | |
959 | r = cg_set_attribute("pids", path, "pids.max", buf); | |
960 | } else | |
961 | r = cg_set_attribute("pids", path, "pids.max", "max"); | |
962 | ||
963 | if (r < 0) | |
f29ff115 TH |
964 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
965 | "Failed to set pids.max: %m"); | |
03a7b521 | 966 | } |
fb385181 LP |
967 | } |
968 | ||
efdb0237 LP |
969 | CGroupMask cgroup_context_get_mask(CGroupContext *c) { |
970 | CGroupMask mask = 0; | |
8e274523 | 971 | |
4ad49000 | 972 | /* Figure out which controllers we need */ |
8e274523 | 973 | |
b2f8b02e | 974 | if (c->cpu_accounting || |
66ebf6c0 TH |
975 | cgroup_context_has_cpu_weight(c) || |
976 | cgroup_context_has_cpu_shares(c) || | |
3a43da28 | 977 | c->cpu_quota_per_sec_usec != USEC_INFINITY) |
efdb0237 | 978 | mask |= CGROUP_MASK_CPUACCT | CGROUP_MASK_CPU; |
ecedd90f | 979 | |
538b4852 TH |
980 | if (cgroup_context_has_io_config(c) || cgroup_context_has_blockio_config(c)) |
981 | mask |= CGROUP_MASK_IO | CGROUP_MASK_BLKIO; | |
ecedd90f | 982 | |
4ad49000 | 983 | if (c->memory_accounting || |
da4d897e TH |
984 | c->memory_limit != CGROUP_LIMIT_MAX || |
985 | cgroup_context_has_unified_memory_config(c)) | |
efdb0237 | 986 | mask |= CGROUP_MASK_MEMORY; |
8e274523 | 987 | |
a931ad47 LP |
988 | if (c->device_allow || |
989 | c->device_policy != CGROUP_AUTO) | |
3905f127 | 990 | mask |= CGROUP_MASK_DEVICES; |
4ad49000 | 991 | |
03a7b521 LP |
992 | if (c->tasks_accounting || |
993 | c->tasks_max != (uint64_t) -1) | |
994 | mask |= CGROUP_MASK_PIDS; | |
995 | ||
4ad49000 | 996 | return mask; |
8e274523 LP |
997 | } |
998 | ||
efdb0237 | 999 | CGroupMask unit_get_own_mask(Unit *u) { |
4ad49000 | 1000 | CGroupContext *c; |
8e274523 | 1001 | |
efdb0237 LP |
1002 | /* Returns the mask of controllers the unit needs for itself */ |
1003 | ||
4ad49000 LP |
1004 | c = unit_get_cgroup_context(u); |
1005 | if (!c) | |
1006 | return 0; | |
8e274523 | 1007 | |
a931ad47 | 1008 | /* If delegation is turned on, then turn on all cgroups, |
19af675e LP |
1009 | * unless we are on the legacy hierarchy and the process we |
1010 | * fork into it is known to drop privileges, and hence | |
1011 | * shouldn't get access to the controllers. | |
1012 | * | |
1013 | * Note that on the unified hierarchy it is safe to delegate | |
1014 | * controllers to unprivileged services. */ | |
a931ad47 LP |
1015 | |
1016 | if (c->delegate) { | |
1017 | ExecContext *e; | |
1018 | ||
1019 | e = unit_get_exec_context(u); | |
19af675e LP |
1020 | if (!e || |
1021 | exec_context_maintains_privileges(e) || | |
ca2f6384 | 1022 | cg_all_unified() > 0) |
efdb0237 | 1023 | return _CGROUP_MASK_ALL; |
a931ad47 LP |
1024 | } |
1025 | ||
db785129 | 1026 | return cgroup_context_get_mask(c); |
8e274523 LP |
1027 | } |
1028 | ||
efdb0237 | 1029 | CGroupMask unit_get_members_mask(Unit *u) { |
4ad49000 | 1030 | assert(u); |
bc432dc7 | 1031 | |
efdb0237 LP |
1032 | /* Returns the mask of controllers all of the unit's children |
1033 | * require, merged */ | |
1034 | ||
bc432dc7 LP |
1035 | if (u->cgroup_members_mask_valid) |
1036 | return u->cgroup_members_mask; | |
1037 | ||
1038 | u->cgroup_members_mask = 0; | |
1039 | ||
1040 | if (u->type == UNIT_SLICE) { | |
1041 | Unit *member; | |
1042 | Iterator i; | |
1043 | ||
1044 | SET_FOREACH(member, u->dependencies[UNIT_BEFORE], i) { | |
1045 | ||
1046 | if (member == u) | |
1047 | continue; | |
1048 | ||
d4fdc205 | 1049 | if (UNIT_DEREF(member->slice) != u) |
bc432dc7 LP |
1050 | continue; |
1051 | ||
1052 | u->cgroup_members_mask |= | |
efdb0237 | 1053 | unit_get_own_mask(member) | |
bc432dc7 LP |
1054 | unit_get_members_mask(member); |
1055 | } | |
1056 | } | |
1057 | ||
1058 | u->cgroup_members_mask_valid = true; | |
6414b7c9 | 1059 | return u->cgroup_members_mask; |
246aa6dd LP |
1060 | } |
1061 | ||
efdb0237 | 1062 | CGroupMask unit_get_siblings_mask(Unit *u) { |
4ad49000 | 1063 | assert(u); |
246aa6dd | 1064 | |
efdb0237 LP |
1065 | /* Returns the mask of controllers all of the unit's siblings |
1066 | * require, i.e. the members mask of the unit's parent slice | |
1067 | * if there is one. */ | |
1068 | ||
bc432dc7 | 1069 | if (UNIT_ISSET(u->slice)) |
637f421e | 1070 | return unit_get_members_mask(UNIT_DEREF(u->slice)); |
4ad49000 | 1071 | |
efdb0237 | 1072 | return unit_get_own_mask(u) | unit_get_members_mask(u); |
246aa6dd LP |
1073 | } |
1074 | ||
efdb0237 LP |
1075 | CGroupMask unit_get_subtree_mask(Unit *u) { |
1076 | ||
1077 | /* Returns the mask of this subtree, meaning of the group | |
1078 | * itself and its children. */ | |
1079 | ||
1080 | return unit_get_own_mask(u) | unit_get_members_mask(u); | |
1081 | } | |
1082 | ||
1083 | CGroupMask unit_get_target_mask(Unit *u) { | |
1084 | CGroupMask mask; | |
1085 | ||
1086 | /* This returns the cgroup mask of all controllers to enable | |
1087 | * for a specific cgroup, i.e. everything it needs itself, | |
1088 | * plus all that its children need, plus all that its siblings | |
1089 | * need. This is primarily useful on the legacy cgroup | |
1090 | * hierarchy, where we need to duplicate each cgroup in each | |
1091 | * hierarchy that shall be enabled for it. */ | |
6414b7c9 | 1092 | |
efdb0237 LP |
1093 | mask = unit_get_own_mask(u) | unit_get_members_mask(u) | unit_get_siblings_mask(u); |
1094 | mask &= u->manager->cgroup_supported; | |
1095 | ||
1096 | return mask; | |
1097 | } | |
1098 | ||
1099 | CGroupMask unit_get_enable_mask(Unit *u) { | |
1100 | CGroupMask mask; | |
1101 | ||
1102 | /* This returns the cgroup mask of all controllers to enable | |
1103 | * for the children of a specific cgroup. This is primarily | |
1104 | * useful for the unified cgroup hierarchy, where each cgroup | |
1105 | * controls which controllers are enabled for its children. */ | |
1106 | ||
1107 | mask = unit_get_members_mask(u); | |
6414b7c9 DS |
1108 | mask &= u->manager->cgroup_supported; |
1109 | ||
1110 | return mask; | |
1111 | } | |
1112 | ||
1113 | /* Recurse from a unit up through its containing slices, propagating | |
1114 | * mask bits upward. A unit is also member of itself. */ | |
bc432dc7 | 1115 | void unit_update_cgroup_members_masks(Unit *u) { |
efdb0237 | 1116 | CGroupMask m; |
bc432dc7 LP |
1117 | bool more; |
1118 | ||
1119 | assert(u); | |
1120 | ||
1121 | /* Calculate subtree mask */ | |
efdb0237 | 1122 | m = unit_get_subtree_mask(u); |
bc432dc7 LP |
1123 | |
1124 | /* See if anything changed from the previous invocation. If | |
1125 | * not, we're done. */ | |
1126 | if (u->cgroup_subtree_mask_valid && m == u->cgroup_subtree_mask) | |
1127 | return; | |
1128 | ||
1129 | more = | |
1130 | u->cgroup_subtree_mask_valid && | |
1131 | ((m & ~u->cgroup_subtree_mask) != 0) && | |
1132 | ((~m & u->cgroup_subtree_mask) == 0); | |
1133 | ||
1134 | u->cgroup_subtree_mask = m; | |
1135 | u->cgroup_subtree_mask_valid = true; | |
1136 | ||
6414b7c9 DS |
1137 | if (UNIT_ISSET(u->slice)) { |
1138 | Unit *s = UNIT_DEREF(u->slice); | |
bc432dc7 LP |
1139 | |
1140 | if (more) | |
1141 | /* There's more set now than before. We | |
1142 | * propagate the new mask to the parent's mask | |
1143 | * (not caring if it actually was valid or | |
1144 | * not). */ | |
1145 | ||
1146 | s->cgroup_members_mask |= m; | |
1147 | ||
1148 | else | |
1149 | /* There's less set now than before (or we | |
1150 | * don't know), we need to recalculate | |
1151 | * everything, so let's invalidate the | |
1152 | * parent's members mask */ | |
1153 | ||
1154 | s->cgroup_members_mask_valid = false; | |
1155 | ||
1156 | /* And now make sure that this change also hits our | |
1157 | * grandparents */ | |
1158 | unit_update_cgroup_members_masks(s); | |
6414b7c9 DS |
1159 | } |
1160 | } | |
1161 | ||
efdb0237 | 1162 | static const char *migrate_callback(CGroupMask mask, void *userdata) { |
03b90d4b LP |
1163 | Unit *u = userdata; |
1164 | ||
1165 | assert(mask != 0); | |
1166 | assert(u); | |
1167 | ||
1168 | while (u) { | |
1169 | if (u->cgroup_path && | |
1170 | u->cgroup_realized && | |
1171 | (u->cgroup_realized_mask & mask) == mask) | |
1172 | return u->cgroup_path; | |
1173 | ||
1174 | u = UNIT_DEREF(u->slice); | |
1175 | } | |
1176 | ||
1177 | return NULL; | |
1178 | } | |
1179 | ||
efdb0237 LP |
1180 | char *unit_default_cgroup_path(Unit *u) { |
1181 | _cleanup_free_ char *escaped = NULL, *slice = NULL; | |
1182 | int r; | |
1183 | ||
1184 | assert(u); | |
1185 | ||
1186 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
1187 | return strdup(u->manager->cgroup_root); | |
1188 | ||
1189 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
1190 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); | |
1191 | if (r < 0) | |
1192 | return NULL; | |
1193 | } | |
1194 | ||
1195 | escaped = cg_escape(u->id); | |
1196 | if (!escaped) | |
1197 | return NULL; | |
1198 | ||
1199 | if (slice) | |
1200 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
1201 | else | |
1202 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
1203 | } | |
1204 | ||
1205 | int unit_set_cgroup_path(Unit *u, const char *path) { | |
1206 | _cleanup_free_ char *p = NULL; | |
1207 | int r; | |
1208 | ||
1209 | assert(u); | |
1210 | ||
1211 | if (path) { | |
1212 | p = strdup(path); | |
1213 | if (!p) | |
1214 | return -ENOMEM; | |
1215 | } else | |
1216 | p = NULL; | |
1217 | ||
1218 | if (streq_ptr(u->cgroup_path, p)) | |
1219 | return 0; | |
1220 | ||
1221 | if (p) { | |
1222 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
1223 | if (r < 0) | |
1224 | return r; | |
1225 | } | |
1226 | ||
1227 | unit_release_cgroup(u); | |
1228 | ||
1229 | u->cgroup_path = p; | |
1230 | p = NULL; | |
1231 | ||
1232 | return 1; | |
1233 | } | |
1234 | ||
1235 | int unit_watch_cgroup(Unit *u) { | |
ab2c3861 | 1236 | _cleanup_free_ char *events = NULL; |
efdb0237 LP |
1237 | int r; |
1238 | ||
1239 | assert(u); | |
1240 | ||
1241 | if (!u->cgroup_path) | |
1242 | return 0; | |
1243 | ||
1244 | if (u->cgroup_inotify_wd >= 0) | |
1245 | return 0; | |
1246 | ||
1247 | /* Only applies to the unified hierarchy */ | |
5da38d07 | 1248 | r = cg_unified(SYSTEMD_CGROUP_CONTROLLER); |
efdb0237 | 1249 | if (r < 0) |
595bfe7d | 1250 | return log_unit_error_errno(u, r, "Failed detect whether the unified hierarchy is used: %m"); |
efdb0237 LP |
1251 | if (r == 0) |
1252 | return 0; | |
1253 | ||
1254 | /* Don't watch the root slice, it's pointless. */ | |
1255 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
1256 | return 0; | |
1257 | ||
1258 | r = hashmap_ensure_allocated(&u->manager->cgroup_inotify_wd_unit, &trivial_hash_ops); | |
1259 | if (r < 0) | |
1260 | return log_oom(); | |
1261 | ||
ab2c3861 | 1262 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", &events); |
efdb0237 LP |
1263 | if (r < 0) |
1264 | return log_oom(); | |
1265 | ||
ab2c3861 | 1266 | u->cgroup_inotify_wd = inotify_add_watch(u->manager->cgroup_inotify_fd, events, IN_MODIFY); |
efdb0237 LP |
1267 | if (u->cgroup_inotify_wd < 0) { |
1268 | ||
1269 | if (errno == ENOENT) /* If the directory is already | |
1270 | * gone we don't need to track | |
1271 | * it, so this is not an error */ | |
1272 | return 0; | |
1273 | ||
1274 | return log_unit_error_errno(u, errno, "Failed to add inotify watch descriptor for control group %s: %m", u->cgroup_path); | |
1275 | } | |
1276 | ||
1277 | r = hashmap_put(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd), u); | |
1278 | if (r < 0) | |
1279 | return log_unit_error_errno(u, r, "Failed to add inotify watch descriptor to hash map: %m"); | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static int unit_create_cgroup( | |
1285 | Unit *u, | |
1286 | CGroupMask target_mask, | |
1287 | CGroupMask enable_mask) { | |
1288 | ||
0cd385d3 | 1289 | CGroupContext *c; |
bc432dc7 | 1290 | int r; |
64747e2d | 1291 | |
4ad49000 | 1292 | assert(u); |
64747e2d | 1293 | |
0cd385d3 LP |
1294 | c = unit_get_cgroup_context(u); |
1295 | if (!c) | |
1296 | return 0; | |
1297 | ||
7b3fd631 LP |
1298 | if (!u->cgroup_path) { |
1299 | _cleanup_free_ char *path = NULL; | |
64747e2d | 1300 | |
7b3fd631 LP |
1301 | path = unit_default_cgroup_path(u); |
1302 | if (!path) | |
1303 | return log_oom(); | |
1304 | ||
efdb0237 LP |
1305 | r = unit_set_cgroup_path(u, path); |
1306 | if (r == -EEXIST) | |
1307 | return log_unit_error_errno(u, r, "Control group %s exists already.", path); | |
1308 | if (r < 0) | |
1309 | return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", path); | |
b58b8e11 HH |
1310 | } |
1311 | ||
03b90d4b | 1312 | /* First, create our own group */ |
efdb0237 | 1313 | r = cg_create_everywhere(u->manager->cgroup_supported, target_mask, u->cgroup_path); |
23bbb0de | 1314 | if (r < 0) |
efdb0237 LP |
1315 | return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", u->cgroup_path); |
1316 | ||
1317 | /* Start watching it */ | |
1318 | (void) unit_watch_cgroup(u); | |
1319 | ||
1320 | /* Enable all controllers we need */ | |
1321 | r = cg_enable_everywhere(u->manager->cgroup_supported, enable_mask, u->cgroup_path); | |
1322 | if (r < 0) | |
1323 | log_unit_warning_errno(u, r, "Failed to enable controllers on cgroup %s, ignoring: %m", u->cgroup_path); | |
03b90d4b LP |
1324 | |
1325 | /* Keep track that this is now realized */ | |
4ad49000 | 1326 | u->cgroup_realized = true; |
efdb0237 | 1327 | u->cgroup_realized_mask = target_mask; |
ccf78df1 | 1328 | u->cgroup_enabled_mask = enable_mask; |
4ad49000 | 1329 | |
0cd385d3 LP |
1330 | if (u->type != UNIT_SLICE && !c->delegate) { |
1331 | ||
1332 | /* Then, possibly move things over, but not if | |
1333 | * subgroups may contain processes, which is the case | |
1334 | * for slice and delegation units. */ | |
1335 | r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->cgroup_path, migrate_callback, u); | |
1336 | if (r < 0) | |
efdb0237 | 1337 | log_unit_warning_errno(u, r, "Failed to migrate cgroup from to %s, ignoring: %m", u->cgroup_path); |
0cd385d3 | 1338 | } |
03b90d4b | 1339 | |
64747e2d LP |
1340 | return 0; |
1341 | } | |
1342 | ||
7b3fd631 LP |
1343 | int unit_attach_pids_to_cgroup(Unit *u) { |
1344 | int r; | |
1345 | assert(u); | |
1346 | ||
1347 | r = unit_realize_cgroup(u); | |
1348 | if (r < 0) | |
1349 | return r; | |
1350 | ||
1351 | r = cg_attach_many_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->pids, migrate_callback, u); | |
1352 | if (r < 0) | |
1353 | return r; | |
1354 | ||
1355 | return 0; | |
1356 | } | |
1357 | ||
ccf78df1 | 1358 | static bool unit_has_mask_realized(Unit *u, CGroupMask target_mask, CGroupMask enable_mask) { |
bc432dc7 LP |
1359 | assert(u); |
1360 | ||
ccf78df1 | 1361 | return u->cgroup_realized && u->cgroup_realized_mask == target_mask && u->cgroup_enabled_mask == enable_mask; |
6414b7c9 DS |
1362 | } |
1363 | ||
1364 | /* Check if necessary controllers and attributes for a unit are in place. | |
1365 | * | |
1366 | * If so, do nothing. | |
1367 | * If not, create paths, move processes over, and set attributes. | |
1368 | * | |
1369 | * Returns 0 on success and < 0 on failure. */ | |
db785129 | 1370 | static int unit_realize_cgroup_now(Unit *u, ManagerState state) { |
efdb0237 | 1371 | CGroupMask target_mask, enable_mask; |
6414b7c9 | 1372 | int r; |
64747e2d | 1373 | |
4ad49000 | 1374 | assert(u); |
64747e2d | 1375 | |
4ad49000 | 1376 | if (u->in_cgroup_queue) { |
71fda00f | 1377 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
4ad49000 LP |
1378 | u->in_cgroup_queue = false; |
1379 | } | |
64747e2d | 1380 | |
efdb0237 | 1381 | target_mask = unit_get_target_mask(u); |
ccf78df1 TH |
1382 | enable_mask = unit_get_enable_mask(u); |
1383 | ||
1384 | if (unit_has_mask_realized(u, target_mask, enable_mask)) | |
0a1eb06d | 1385 | return 0; |
64747e2d | 1386 | |
4ad49000 | 1387 | /* First, realize parents */ |
6414b7c9 | 1388 | if (UNIT_ISSET(u->slice)) { |
db785129 | 1389 | r = unit_realize_cgroup_now(UNIT_DEREF(u->slice), state); |
6414b7c9 DS |
1390 | if (r < 0) |
1391 | return r; | |
1392 | } | |
4ad49000 LP |
1393 | |
1394 | /* And then do the real work */ | |
efdb0237 | 1395 | r = unit_create_cgroup(u, target_mask, enable_mask); |
6414b7c9 DS |
1396 | if (r < 0) |
1397 | return r; | |
1398 | ||
1399 | /* Finally, apply the necessary attributes. */ | |
f29ff115 | 1400 | cgroup_context_apply(u, target_mask, state); |
6414b7c9 DS |
1401 | |
1402 | return 0; | |
64747e2d LP |
1403 | } |
1404 | ||
4ad49000 | 1405 | static void unit_add_to_cgroup_queue(Unit *u) { |
ecedd90f | 1406 | |
4ad49000 LP |
1407 | if (u->in_cgroup_queue) |
1408 | return; | |
8e274523 | 1409 | |
71fda00f | 1410 | LIST_PREPEND(cgroup_queue, u->manager->cgroup_queue, u); |
4ad49000 LP |
1411 | u->in_cgroup_queue = true; |
1412 | } | |
8c6db833 | 1413 | |
4ad49000 | 1414 | unsigned manager_dispatch_cgroup_queue(Manager *m) { |
db785129 | 1415 | ManagerState state; |
4ad49000 | 1416 | unsigned n = 0; |
db785129 | 1417 | Unit *i; |
6414b7c9 | 1418 | int r; |
ecedd90f | 1419 | |
db785129 LP |
1420 | state = manager_state(m); |
1421 | ||
4ad49000 LP |
1422 | while ((i = m->cgroup_queue)) { |
1423 | assert(i->in_cgroup_queue); | |
ecedd90f | 1424 | |
db785129 | 1425 | r = unit_realize_cgroup_now(i, state); |
6414b7c9 | 1426 | if (r < 0) |
efdb0237 | 1427 | log_warning_errno(r, "Failed to realize cgroups for queued unit %s, ignoring: %m", i->id); |
0a1eb06d | 1428 | |
4ad49000 LP |
1429 | n++; |
1430 | } | |
ecedd90f | 1431 | |
4ad49000 | 1432 | return n; |
8e274523 LP |
1433 | } |
1434 | ||
4ad49000 LP |
1435 | static void unit_queue_siblings(Unit *u) { |
1436 | Unit *slice; | |
ca949c9d | 1437 | |
4ad49000 LP |
1438 | /* This adds the siblings of the specified unit and the |
1439 | * siblings of all parent units to the cgroup queue. (But | |
1440 | * neither the specified unit itself nor the parents.) */ | |
1441 | ||
1442 | while ((slice = UNIT_DEREF(u->slice))) { | |
1443 | Iterator i; | |
1444 | Unit *m; | |
8f53a7b8 | 1445 | |
4ad49000 LP |
1446 | SET_FOREACH(m, slice->dependencies[UNIT_BEFORE], i) { |
1447 | if (m == u) | |
1448 | continue; | |
8e274523 | 1449 | |
6414b7c9 DS |
1450 | /* Skip units that have a dependency on the slice |
1451 | * but aren't actually in it. */ | |
4ad49000 | 1452 | if (UNIT_DEREF(m->slice) != slice) |
50159e6a | 1453 | continue; |
8e274523 | 1454 | |
6414b7c9 DS |
1455 | /* No point in doing cgroup application for units |
1456 | * without active processes. */ | |
1457 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(m))) | |
1458 | continue; | |
1459 | ||
1460 | /* If the unit doesn't need any new controllers | |
1461 | * and has current ones realized, it doesn't need | |
1462 | * any changes. */ | |
ccf78df1 | 1463 | if (unit_has_mask_realized(m, unit_get_target_mask(m), unit_get_enable_mask(m))) |
6414b7c9 DS |
1464 | continue; |
1465 | ||
4ad49000 | 1466 | unit_add_to_cgroup_queue(m); |
50159e6a LP |
1467 | } |
1468 | ||
4ad49000 | 1469 | u = slice; |
8e274523 | 1470 | } |
4ad49000 LP |
1471 | } |
1472 | ||
0a1eb06d | 1473 | int unit_realize_cgroup(Unit *u) { |
4ad49000 LP |
1474 | assert(u); |
1475 | ||
35b7ff80 | 1476 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
0a1eb06d | 1477 | return 0; |
8e274523 | 1478 | |
4ad49000 LP |
1479 | /* So, here's the deal: when realizing the cgroups for this |
1480 | * unit, we need to first create all parents, but there's more | |
1481 | * actually: for the weight-based controllers we also need to | |
1482 | * make sure that all our siblings (i.e. units that are in the | |
73e231ab | 1483 | * same slice as we are) have cgroups, too. Otherwise, things |
4ad49000 LP |
1484 | * would become very uneven as each of their processes would |
1485 | * get as much resources as all our group together. This call | |
1486 | * will synchronously create the parent cgroups, but will | |
1487 | * defer work on the siblings to the next event loop | |
1488 | * iteration. */ | |
ca949c9d | 1489 | |
4ad49000 LP |
1490 | /* Add all sibling slices to the cgroup queue. */ |
1491 | unit_queue_siblings(u); | |
1492 | ||
6414b7c9 | 1493 | /* And realize this one now (and apply the values) */ |
db785129 | 1494 | return unit_realize_cgroup_now(u, manager_state(u->manager)); |
8e274523 LP |
1495 | } |
1496 | ||
efdb0237 LP |
1497 | void unit_release_cgroup(Unit *u) { |
1498 | assert(u); | |
1499 | ||
1500 | /* Forgets all cgroup details for this cgroup */ | |
1501 | ||
1502 | if (u->cgroup_path) { | |
1503 | (void) hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
1504 | u->cgroup_path = mfree(u->cgroup_path); | |
1505 | } | |
1506 | ||
1507 | if (u->cgroup_inotify_wd >= 0) { | |
1508 | if (inotify_rm_watch(u->manager->cgroup_inotify_fd, u->cgroup_inotify_wd) < 0) | |
1509 | log_unit_debug_errno(u, errno, "Failed to remove cgroup inotify watch %i for %s, ignoring", u->cgroup_inotify_wd, u->id); | |
1510 | ||
1511 | (void) hashmap_remove(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd)); | |
1512 | u->cgroup_inotify_wd = -1; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | void unit_prune_cgroup(Unit *u) { | |
8e274523 | 1517 | int r; |
efdb0237 | 1518 | bool is_root_slice; |
8e274523 | 1519 | |
4ad49000 | 1520 | assert(u); |
8e274523 | 1521 | |
efdb0237 LP |
1522 | /* Removes the cgroup, if empty and possible, and stops watching it. */ |
1523 | ||
4ad49000 LP |
1524 | if (!u->cgroup_path) |
1525 | return; | |
8e274523 | 1526 | |
efdb0237 LP |
1527 | is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE); |
1528 | ||
1529 | r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !is_root_slice); | |
dab5bf85 | 1530 | if (r < 0) { |
f29ff115 | 1531 | log_unit_debug_errno(u, r, "Failed to destroy cgroup %s, ignoring: %m", u->cgroup_path); |
dab5bf85 RL |
1532 | return; |
1533 | } | |
8e274523 | 1534 | |
efdb0237 LP |
1535 | if (is_root_slice) |
1536 | return; | |
1537 | ||
1538 | unit_release_cgroup(u); | |
0a1eb06d | 1539 | |
4ad49000 | 1540 | u->cgroup_realized = false; |
bc432dc7 | 1541 | u->cgroup_realized_mask = 0; |
ccf78df1 | 1542 | u->cgroup_enabled_mask = 0; |
8e274523 LP |
1543 | } |
1544 | ||
efdb0237 | 1545 | int unit_search_main_pid(Unit *u, pid_t *ret) { |
4ad49000 LP |
1546 | _cleanup_fclose_ FILE *f = NULL; |
1547 | pid_t pid = 0, npid, mypid; | |
efdb0237 | 1548 | int r; |
4ad49000 LP |
1549 | |
1550 | assert(u); | |
efdb0237 | 1551 | assert(ret); |
4ad49000 LP |
1552 | |
1553 | if (!u->cgroup_path) | |
efdb0237 | 1554 | return -ENXIO; |
4ad49000 | 1555 | |
efdb0237 LP |
1556 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &f); |
1557 | if (r < 0) | |
1558 | return r; | |
4ad49000 LP |
1559 | |
1560 | mypid = getpid(); | |
1561 | while (cg_read_pid(f, &npid) > 0) { | |
1562 | pid_t ppid; | |
1563 | ||
1564 | if (npid == pid) | |
1565 | continue; | |
8e274523 | 1566 | |
4ad49000 | 1567 | /* Ignore processes that aren't our kids */ |
6bc73acb | 1568 | if (get_process_ppid(npid, &ppid) >= 0 && ppid != mypid) |
4ad49000 | 1569 | continue; |
8e274523 | 1570 | |
efdb0237 | 1571 | if (pid != 0) |
4ad49000 LP |
1572 | /* Dang, there's more than one daemonized PID |
1573 | in this group, so we don't know what process | |
1574 | is the main process. */ | |
efdb0237 LP |
1575 | |
1576 | return -ENODATA; | |
8e274523 | 1577 | |
4ad49000 | 1578 | pid = npid; |
8e274523 LP |
1579 | } |
1580 | ||
efdb0237 LP |
1581 | *ret = pid; |
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
b3c5bad3 | 1586 | _cleanup_closedir_ DIR *d = NULL; |
efdb0237 LP |
1587 | _cleanup_fclose_ FILE *f = NULL; |
1588 | int ret = 0, r; | |
1589 | ||
1590 | assert(u); | |
1591 | assert(path); | |
1592 | ||
1593 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1594 | if (r < 0) | |
1595 | ret = r; | |
1596 | else { | |
1597 | pid_t pid; | |
1598 | ||
1599 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1600 | r = unit_watch_pid(u, pid); | |
1601 | if (r < 0 && ret >= 0) | |
1602 | ret = r; | |
1603 | } | |
1604 | ||
1605 | if (r < 0 && ret >= 0) | |
1606 | ret = r; | |
1607 | } | |
1608 | ||
1609 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1610 | if (r < 0) { | |
1611 | if (ret >= 0) | |
1612 | ret = r; | |
1613 | } else { | |
1614 | char *fn; | |
1615 | ||
1616 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1617 | _cleanup_free_ char *p = NULL; | |
1618 | ||
1619 | p = strjoin(path, "/", fn, NULL); | |
1620 | free(fn); | |
1621 | ||
1622 | if (!p) | |
1623 | return -ENOMEM; | |
1624 | ||
1625 | r = unit_watch_pids_in_path(u, p); | |
1626 | if (r < 0 && ret >= 0) | |
1627 | ret = r; | |
1628 | } | |
1629 | ||
1630 | if (r < 0 && ret >= 0) | |
1631 | ret = r; | |
1632 | } | |
1633 | ||
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | int unit_watch_all_pids(Unit *u) { | |
1638 | assert(u); | |
1639 | ||
1640 | /* Adds all PIDs from our cgroup to the set of PIDs we | |
1641 | * watch. This is a fallback logic for cases where we do not | |
1642 | * get reliable cgroup empty notifications: we try to use | |
1643 | * SIGCHLD as replacement. */ | |
1644 | ||
1645 | if (!u->cgroup_path) | |
1646 | return -ENOENT; | |
1647 | ||
5da38d07 | 1648 | if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) > 0) /* On unified we can use proper notifications */ |
efdb0237 LP |
1649 | return 0; |
1650 | ||
1651 | return unit_watch_pids_in_path(u, u->cgroup_path); | |
1652 | } | |
1653 | ||
1654 | int unit_notify_cgroup_empty(Unit *u) { | |
1655 | int r; | |
1656 | ||
1657 | assert(u); | |
1658 | ||
1659 | if (!u->cgroup_path) | |
1660 | return 0; | |
1661 | ||
1662 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
1663 | if (r <= 0) | |
1664 | return r; | |
1665 | ||
1666 | unit_add_to_gc_queue(u); | |
1667 | ||
1668 | if (UNIT_VTABLE(u)->notify_cgroup_empty) | |
1669 | UNIT_VTABLE(u)->notify_cgroup_empty(u); | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | ||
1674 | static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
1675 | Manager *m = userdata; | |
1676 | ||
1677 | assert(s); | |
1678 | assert(fd >= 0); | |
1679 | assert(m); | |
1680 | ||
1681 | for (;;) { | |
1682 | union inotify_event_buffer buffer; | |
1683 | struct inotify_event *e; | |
1684 | ssize_t l; | |
1685 | ||
1686 | l = read(fd, &buffer, sizeof(buffer)); | |
1687 | if (l < 0) { | |
1688 | if (errno == EINTR || errno == EAGAIN) | |
1689 | return 0; | |
1690 | ||
1691 | return log_error_errno(errno, "Failed to read control group inotify events: %m"); | |
1692 | } | |
1693 | ||
1694 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
1695 | Unit *u; | |
1696 | ||
1697 | if (e->wd < 0) | |
1698 | /* Queue overflow has no watch descriptor */ | |
1699 | continue; | |
1700 | ||
1701 | if (e->mask & IN_IGNORED) | |
1702 | /* The watch was just removed */ | |
1703 | continue; | |
1704 | ||
1705 | u = hashmap_get(m->cgroup_inotify_wd_unit, INT_TO_PTR(e->wd)); | |
1706 | if (!u) /* Not that inotify might deliver | |
1707 | * events for a watch even after it | |
1708 | * was removed, because it was queued | |
1709 | * before the removal. Let's ignore | |
1710 | * this here safely. */ | |
1711 | continue; | |
1712 | ||
1713 | (void) unit_notify_cgroup_empty(u); | |
1714 | } | |
1715 | } | |
8e274523 LP |
1716 | } |
1717 | ||
8e274523 | 1718 | int manager_setup_cgroup(Manager *m) { |
9444b1f2 | 1719 | _cleanup_free_ char *path = NULL; |
efdb0237 | 1720 | CGroupController c; |
5da38d07 | 1721 | int r, all_unified, systemd_unified; |
efdb0237 | 1722 | char *e; |
8e274523 LP |
1723 | |
1724 | assert(m); | |
1725 | ||
35d2e7ec | 1726 | /* 1. Determine hierarchy */ |
efdb0237 | 1727 | m->cgroup_root = mfree(m->cgroup_root); |
9444b1f2 | 1728 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &m->cgroup_root); |
23bbb0de MS |
1729 | if (r < 0) |
1730 | return log_error_errno(r, "Cannot determine cgroup we are running in: %m"); | |
8e274523 | 1731 | |
efdb0237 LP |
1732 | /* Chop off the init scope, if we are already located in it */ |
1733 | e = endswith(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
0d8c31ff | 1734 | |
efdb0237 LP |
1735 | /* LEGACY: Also chop off the system slice if we are in |
1736 | * it. This is to support live upgrades from older systemd | |
1737 | * versions where PID 1 was moved there. Also see | |
1738 | * cg_get_root_path(). */ | |
463d0d15 | 1739 | if (!e && MANAGER_IS_SYSTEM(m)) { |
9444b1f2 | 1740 | e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE); |
15c60e99 | 1741 | if (!e) |
efdb0237 | 1742 | e = endswith(m->cgroup_root, "/system"); /* even more legacy */ |
0baf24dd | 1743 | } |
efdb0237 LP |
1744 | if (e) |
1745 | *e = 0; | |
7ccfb64a | 1746 | |
9444b1f2 LP |
1747 | /* And make sure to store away the root value without trailing |
1748 | * slash, even for the root dir, so that we can easily prepend | |
1749 | * it everywhere. */ | |
efdb0237 LP |
1750 | while ((e = endswith(m->cgroup_root, "/"))) |
1751 | *e = 0; | |
8e274523 | 1752 | |
35d2e7ec | 1753 | /* 2. Show data */ |
9444b1f2 | 1754 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, NULL, &path); |
23bbb0de MS |
1755 | if (r < 0) |
1756 | return log_error_errno(r, "Cannot find cgroup mount point: %m"); | |
8e274523 | 1757 | |
5da38d07 TH |
1758 | all_unified = cg_all_unified(); |
1759 | systemd_unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER); | |
1760 | ||
1761 | if (all_unified < 0 || systemd_unified < 0) | |
1762 | return log_error_errno(all_unified < 0 ? all_unified : systemd_unified, | |
1763 | "Couldn't determine if we are running in the unified hierarchy: %m"); | |
1764 | ||
1765 | if (all_unified > 0) | |
efdb0237 | 1766 | log_debug("Unified cgroup hierarchy is located at %s.", path); |
5da38d07 TH |
1767 | else if (systemd_unified > 0) |
1768 | log_debug("Unified cgroup hierarchy is located at %s. Controllers are on legacy hierarchies.", path); | |
efdb0237 LP |
1769 | else |
1770 | log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path); | |
1771 | ||
0d8c31ff | 1772 | if (!m->test_run) { |
efdb0237 | 1773 | const char *scope_path; |
c6c18be3 | 1774 | |
0d8c31ff | 1775 | /* 3. Install agent */ |
5da38d07 | 1776 | if (systemd_unified) { |
efdb0237 | 1777 | |
61233823 | 1778 | /* In the unified hierarchy we can get |
efdb0237 LP |
1779 | * cgroup empty notifications via inotify. */ |
1780 | ||
1781 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1782 | safe_close(m->cgroup_inotify_fd); | |
1783 | ||
1784 | m->cgroup_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
1785 | if (m->cgroup_inotify_fd < 0) | |
1786 | return log_error_errno(errno, "Failed to create control group inotify object: %m"); | |
1787 | ||
1788 | r = sd_event_add_io(m->event, &m->cgroup_inotify_event_source, m->cgroup_inotify_fd, EPOLLIN, on_cgroup_inotify_event, m); | |
1789 | if (r < 0) | |
1790 | return log_error_errno(r, "Failed to watch control group inotify object: %m"); | |
1791 | ||
d8fdc620 LP |
1792 | /* Process cgroup empty notifications early, but after service notifications and SIGCHLD. Also |
1793 | * see handling of cgroup agent notifications, for the classic cgroup hierarchy support. */ | |
1794 | r = sd_event_source_set_priority(m->cgroup_inotify_event_source, SD_EVENT_PRIORITY_NORMAL-5); | |
efdb0237 LP |
1795 | if (r < 0) |
1796 | return log_error_errno(r, "Failed to set priority of inotify event source: %m"); | |
1797 | ||
1798 | (void) sd_event_source_set_description(m->cgroup_inotify_event_source, "cgroup-inotify"); | |
1799 | ||
463d0d15 | 1800 | } else if (MANAGER_IS_SYSTEM(m)) { |
efdb0237 LP |
1801 | |
1802 | /* On the legacy hierarchy we only get | |
1803 | * notifications via cgroup agents. (Which | |
1804 | * isn't really reliable, since it does not | |
1805 | * generate events when control groups with | |
1806 | * children run empty. */ | |
1807 | ||
0d8c31ff ZJS |
1808 | r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH); |
1809 | if (r < 0) | |
da927ba9 | 1810 | log_warning_errno(r, "Failed to install release agent, ignoring: %m"); |
0d8c31ff ZJS |
1811 | else if (r > 0) |
1812 | log_debug("Installed release agent."); | |
efdb0237 | 1813 | else if (r == 0) |
0d8c31ff ZJS |
1814 | log_debug("Release agent already installed."); |
1815 | } | |
8e274523 | 1816 | |
efdb0237 LP |
1817 | /* 4. Make sure we are in the special "init.scope" unit in the root slice. */ |
1818 | scope_path = strjoina(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
1819 | r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); | |
23bbb0de | 1820 | if (r < 0) |
efdb0237 LP |
1821 | return log_error_errno(r, "Failed to create %s control group: %m", scope_path); |
1822 | ||
1823 | /* also, move all other userspace processes remaining | |
1824 | * in the root cgroup into that scope. */ | |
1d98fef1 | 1825 | r = cg_migrate(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); |
efdb0237 LP |
1826 | if (r < 0) |
1827 | log_warning_errno(r, "Couldn't move remaining userspace processes, ignoring: %m"); | |
c6c18be3 | 1828 | |
0d8c31ff ZJS |
1829 | /* 5. And pin it, so that it cannot be unmounted */ |
1830 | safe_close(m->pin_cgroupfs_fd); | |
0d8c31ff | 1831 | m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK); |
4a62c710 MS |
1832 | if (m->pin_cgroupfs_fd < 0) |
1833 | return log_error_errno(errno, "Failed to open pin file: %m"); | |
0d8c31ff | 1834 | |
cc98b302 | 1835 | /* 6. Always enable hierarchical support if it exists... */ |
5da38d07 | 1836 | if (!all_unified) |
efdb0237 | 1837 | (void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1"); |
c6c18be3 LP |
1838 | } |
1839 | ||
0d8c31ff | 1840 | /* 7. Figure out which controllers are supported */ |
efdb0237 LP |
1841 | r = cg_mask_supported(&m->cgroup_supported); |
1842 | if (r < 0) | |
1843 | return log_error_errno(r, "Failed to determine supported controllers: %m"); | |
1844 | ||
1845 | for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) | |
eee0a1e4 | 1846 | log_debug("Controller '%s' supported: %s", cgroup_controller_to_string(c), yes_no(m->cgroup_supported & CGROUP_CONTROLLER_TO_MASK(c))); |
9156e799 | 1847 | |
a32360f1 | 1848 | return 0; |
8e274523 LP |
1849 | } |
1850 | ||
c6c18be3 | 1851 | void manager_shutdown_cgroup(Manager *m, bool delete) { |
8e274523 LP |
1852 | assert(m); |
1853 | ||
9444b1f2 LP |
1854 | /* We can't really delete the group, since we are in it. But |
1855 | * let's trim it. */ | |
1856 | if (delete && m->cgroup_root) | |
efdb0237 LP |
1857 | (void) cg_trim(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, false); |
1858 | ||
1859 | m->cgroup_inotify_wd_unit = hashmap_free(m->cgroup_inotify_wd_unit); | |
1860 | ||
1861 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1862 | m->cgroup_inotify_fd = safe_close(m->cgroup_inotify_fd); | |
8e274523 | 1863 | |
03e334a1 | 1864 | m->pin_cgroupfs_fd = safe_close(m->pin_cgroupfs_fd); |
c6c18be3 | 1865 | |
efdb0237 | 1866 | m->cgroup_root = mfree(m->cgroup_root); |
8e274523 LP |
1867 | } |
1868 | ||
4ad49000 | 1869 | Unit* manager_get_unit_by_cgroup(Manager *m, const char *cgroup) { |
acb14d31 | 1870 | char *p; |
4ad49000 | 1871 | Unit *u; |
acb14d31 LP |
1872 | |
1873 | assert(m); | |
1874 | assert(cgroup); | |
acb14d31 | 1875 | |
4ad49000 LP |
1876 | u = hashmap_get(m->cgroup_unit, cgroup); |
1877 | if (u) | |
1878 | return u; | |
acb14d31 | 1879 | |
8e70580b | 1880 | p = strdupa(cgroup); |
acb14d31 LP |
1881 | for (;;) { |
1882 | char *e; | |
1883 | ||
1884 | e = strrchr(p, '/'); | |
efdb0237 LP |
1885 | if (!e || e == p) |
1886 | return hashmap_get(m->cgroup_unit, SPECIAL_ROOT_SLICE); | |
acb14d31 LP |
1887 | |
1888 | *e = 0; | |
1889 | ||
4ad49000 LP |
1890 | u = hashmap_get(m->cgroup_unit, p); |
1891 | if (u) | |
1892 | return u; | |
acb14d31 LP |
1893 | } |
1894 | } | |
1895 | ||
b3ac818b | 1896 | Unit *manager_get_unit_by_pid_cgroup(Manager *m, pid_t pid) { |
4ad49000 | 1897 | _cleanup_free_ char *cgroup = NULL; |
acb14d31 | 1898 | int r; |
8e274523 | 1899 | |
8c47c732 LP |
1900 | assert(m); |
1901 | ||
b3ac818b LP |
1902 | if (pid <= 0) |
1903 | return NULL; | |
1904 | ||
1905 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &cgroup); | |
1906 | if (r < 0) | |
1907 | return NULL; | |
1908 | ||
1909 | return manager_get_unit_by_cgroup(m, cgroup); | |
1910 | } | |
1911 | ||
1912 | Unit *manager_get_unit_by_pid(Manager *m, pid_t pid) { | |
1913 | Unit *u; | |
1914 | ||
1915 | assert(m); | |
1916 | ||
efdb0237 | 1917 | if (pid <= 0) |
8c47c732 LP |
1918 | return NULL; |
1919 | ||
efdb0237 LP |
1920 | if (pid == 1) |
1921 | return hashmap_get(m->units, SPECIAL_INIT_SCOPE); | |
1922 | ||
fea72cc0 | 1923 | u = hashmap_get(m->watch_pids1, PID_TO_PTR(pid)); |
5fe8876b LP |
1924 | if (u) |
1925 | return u; | |
1926 | ||
fea72cc0 | 1927 | u = hashmap_get(m->watch_pids2, PID_TO_PTR(pid)); |
5fe8876b LP |
1928 | if (u) |
1929 | return u; | |
1930 | ||
b3ac818b | 1931 | return manager_get_unit_by_pid_cgroup(m, pid); |
6dde1f33 | 1932 | } |
4fbf50b3 | 1933 | |
4ad49000 LP |
1934 | int manager_notify_cgroup_empty(Manager *m, const char *cgroup) { |
1935 | Unit *u; | |
4fbf50b3 | 1936 | |
4ad49000 LP |
1937 | assert(m); |
1938 | assert(cgroup); | |
4fbf50b3 | 1939 | |
d8fdc620 LP |
1940 | log_debug("Got cgroup empty notification for: %s", cgroup); |
1941 | ||
4ad49000 | 1942 | u = manager_get_unit_by_cgroup(m, cgroup); |
5ad096b3 LP |
1943 | if (!u) |
1944 | return 0; | |
b56c28c3 | 1945 | |
efdb0237 | 1946 | return unit_notify_cgroup_empty(u); |
5ad096b3 LP |
1947 | } |
1948 | ||
1949 | int unit_get_memory_current(Unit *u, uint64_t *ret) { | |
1950 | _cleanup_free_ char *v = NULL; | |
1951 | int r; | |
1952 | ||
1953 | assert(u); | |
1954 | assert(ret); | |
1955 | ||
1956 | if (!u->cgroup_path) | |
1957 | return -ENODATA; | |
1958 | ||
efdb0237 | 1959 | if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0) |
5ad096b3 LP |
1960 | return -ENODATA; |
1961 | ||
ca2f6384 | 1962 | if (cg_all_unified() <= 0) |
efdb0237 LP |
1963 | r = cg_get_attribute("memory", u->cgroup_path, "memory.usage_in_bytes", &v); |
1964 | else | |
1965 | r = cg_get_attribute("memory", u->cgroup_path, "memory.current", &v); | |
5ad096b3 LP |
1966 | if (r == -ENOENT) |
1967 | return -ENODATA; | |
1968 | if (r < 0) | |
1969 | return r; | |
1970 | ||
1971 | return safe_atou64(v, ret); | |
1972 | } | |
1973 | ||
03a7b521 LP |
1974 | int unit_get_tasks_current(Unit *u, uint64_t *ret) { |
1975 | _cleanup_free_ char *v = NULL; | |
1976 | int r; | |
1977 | ||
1978 | assert(u); | |
1979 | assert(ret); | |
1980 | ||
1981 | if (!u->cgroup_path) | |
1982 | return -ENODATA; | |
1983 | ||
1984 | if ((u->cgroup_realized_mask & CGROUP_MASK_PIDS) == 0) | |
1985 | return -ENODATA; | |
1986 | ||
1987 | r = cg_get_attribute("pids", u->cgroup_path, "pids.current", &v); | |
1988 | if (r == -ENOENT) | |
1989 | return -ENODATA; | |
1990 | if (r < 0) | |
1991 | return r; | |
1992 | ||
1993 | return safe_atou64(v, ret); | |
1994 | } | |
1995 | ||
5ad096b3 LP |
1996 | static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) { |
1997 | _cleanup_free_ char *v = NULL; | |
1998 | uint64_t ns; | |
1999 | int r; | |
2000 | ||
2001 | assert(u); | |
2002 | assert(ret); | |
2003 | ||
2004 | if (!u->cgroup_path) | |
2005 | return -ENODATA; | |
2006 | ||
ca2f6384 | 2007 | if (cg_all_unified() > 0) { |
66ebf6c0 TH |
2008 | const char *keys[] = { "usage_usec", NULL }; |
2009 | _cleanup_free_ char *val = NULL; | |
2010 | uint64_t us; | |
5ad096b3 | 2011 | |
66ebf6c0 TH |
2012 | if ((u->cgroup_realized_mask & CGROUP_MASK_CPU) == 0) |
2013 | return -ENODATA; | |
5ad096b3 | 2014 | |
66ebf6c0 TH |
2015 | r = cg_get_keyed_attribute("cpu", u->cgroup_path, "cpu.stat", keys, &val); |
2016 | if (r < 0) | |
2017 | return r; | |
2018 | ||
2019 | r = safe_atou64(val, &us); | |
2020 | if (r < 0) | |
2021 | return r; | |
2022 | ||
2023 | ns = us * NSEC_PER_USEC; | |
2024 | } else { | |
2025 | if ((u->cgroup_realized_mask & CGROUP_MASK_CPUACCT) == 0) | |
2026 | return -ENODATA; | |
2027 | ||
2028 | r = cg_get_attribute("cpuacct", u->cgroup_path, "cpuacct.usage", &v); | |
2029 | if (r == -ENOENT) | |
2030 | return -ENODATA; | |
2031 | if (r < 0) | |
2032 | return r; | |
2033 | ||
2034 | r = safe_atou64(v, &ns); | |
2035 | if (r < 0) | |
2036 | return r; | |
2037 | } | |
5ad096b3 LP |
2038 | |
2039 | *ret = ns; | |
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | int unit_get_cpu_usage(Unit *u, nsec_t *ret) { | |
2044 | nsec_t ns; | |
2045 | int r; | |
2046 | ||
2047 | r = unit_get_cpu_usage_raw(u, &ns); | |
2048 | if (r < 0) | |
2049 | return r; | |
2050 | ||
66ebf6c0 TH |
2051 | if (ns > u->cpu_usage_base) |
2052 | ns -= u->cpu_usage_base; | |
5ad096b3 LP |
2053 | else |
2054 | ns = 0; | |
2055 | ||
2056 | *ret = ns; | |
2057 | return 0; | |
2058 | } | |
2059 | ||
2060 | int unit_reset_cpu_usage(Unit *u) { | |
2061 | nsec_t ns; | |
2062 | int r; | |
2063 | ||
2064 | assert(u); | |
2065 | ||
2066 | r = unit_get_cpu_usage_raw(u, &ns); | |
2067 | if (r < 0) { | |
66ebf6c0 | 2068 | u->cpu_usage_base = 0; |
5ad096b3 | 2069 | return r; |
b56c28c3 | 2070 | } |
2633eb83 | 2071 | |
66ebf6c0 | 2072 | u->cpu_usage_base = ns; |
4ad49000 | 2073 | return 0; |
4fbf50b3 LP |
2074 | } |
2075 | ||
e9db43d5 LP |
2076 | bool unit_cgroup_delegate(Unit *u) { |
2077 | CGroupContext *c; | |
2078 | ||
2079 | assert(u); | |
2080 | ||
2081 | c = unit_get_cgroup_context(u); | |
2082 | if (!c) | |
2083 | return false; | |
2084 | ||
2085 | return c->delegate; | |
2086 | } | |
2087 | ||
e7ab4d1a LP |
2088 | void unit_invalidate_cgroup(Unit *u, CGroupMask m) { |
2089 | assert(u); | |
2090 | ||
2091 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2092 | return; | |
2093 | ||
2094 | if (m == 0) | |
2095 | return; | |
2096 | ||
538b4852 TH |
2097 | /* always invalidate compat pairs together */ |
2098 | if (m & (CGROUP_MASK_IO | CGROUP_MASK_BLKIO)) | |
2099 | m |= CGROUP_MASK_IO | CGROUP_MASK_BLKIO; | |
2100 | ||
e7ab4d1a LP |
2101 | if ((u->cgroup_realized_mask & m) == 0) |
2102 | return; | |
2103 | ||
2104 | u->cgroup_realized_mask &= ~m; | |
2105 | unit_add_to_cgroup_queue(u); | |
2106 | } | |
2107 | ||
2108 | void manager_invalidate_startup_units(Manager *m) { | |
2109 | Iterator i; | |
2110 | Unit *u; | |
2111 | ||
2112 | assert(m); | |
2113 | ||
2114 | SET_FOREACH(u, m->startup_units, i) | |
13c31542 | 2115 | unit_invalidate_cgroup(u, CGROUP_MASK_CPU|CGROUP_MASK_IO|CGROUP_MASK_BLKIO); |
e7ab4d1a LP |
2116 | } |
2117 | ||
4ad49000 LP |
2118 | static const char* const cgroup_device_policy_table[_CGROUP_DEVICE_POLICY_MAX] = { |
2119 | [CGROUP_AUTO] = "auto", | |
2120 | [CGROUP_CLOSED] = "closed", | |
2121 | [CGROUP_STRICT] = "strict", | |
2122 | }; | |
4fbf50b3 | 2123 | |
4ad49000 | 2124 | DEFINE_STRING_TABLE_LOOKUP(cgroup_device_policy, CGroupDevicePolicy); |