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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
8e274523 LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
4ad49000 | 6 | Copyright 2013 Lennart Poettering |
8e274523 LP |
7 | |
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
8e274523 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
8e274523 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
8e274523 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
c6c18be3 | 22 | #include <fcntl.h> |
e41969e3 | 23 | #include <fnmatch.h> |
8c6db833 | 24 | |
0b452006 | 25 | #include "process-util.h" |
9eb977db | 26 | #include "path-util.h" |
9444b1f2 | 27 | #include "special.h" |
4ad49000 LP |
28 | #include "cgroup-util.h" |
29 | #include "cgroup.h" | |
8e274523 | 30 | |
9a054909 LP |
31 | #define CGROUP_CPU_QUOTA_PERIOD_USEC ((usec_t) 100 * USEC_PER_MSEC) |
32 | ||
4ad49000 LP |
33 | void cgroup_context_init(CGroupContext *c) { |
34 | assert(c); | |
35 | ||
36 | /* Initialize everything to the kernel defaults, assuming the | |
37 | * structure is preinitialized to 0 */ | |
38 | ||
db785129 LP |
39 | c->cpu_shares = (unsigned long) -1; |
40 | c->startup_cpu_shares = (unsigned long) -1; | |
ddca82ac | 41 | c->memory_limit = (uint64_t) -1; |
db785129 LP |
42 | c->blockio_weight = (unsigned long) -1; |
43 | c->startup_blockio_weight = (unsigned long) -1; | |
b2f8b02e | 44 | |
3a43da28 | 45 | c->cpu_quota_per_sec_usec = USEC_INFINITY; |
4ad49000 | 46 | } |
8e274523 | 47 | |
4ad49000 LP |
48 | void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a) { |
49 | assert(c); | |
50 | assert(a); | |
51 | ||
71fda00f | 52 | LIST_REMOVE(device_allow, c->device_allow, a); |
4ad49000 LP |
53 | free(a->path); |
54 | free(a); | |
55 | } | |
56 | ||
57 | void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w) { | |
58 | assert(c); | |
59 | assert(w); | |
60 | ||
71fda00f | 61 | LIST_REMOVE(device_weights, c->blockio_device_weights, w); |
4ad49000 LP |
62 | free(w->path); |
63 | free(w); | |
64 | } | |
65 | ||
66 | void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b) { | |
67 | assert(c); | |
8e274523 | 68 | assert(b); |
8e274523 | 69 | |
71fda00f | 70 | LIST_REMOVE(device_bandwidths, c->blockio_device_bandwidths, b); |
4ad49000 LP |
71 | free(b->path); |
72 | free(b); | |
73 | } | |
74 | ||
75 | void cgroup_context_done(CGroupContext *c) { | |
76 | assert(c); | |
77 | ||
78 | while (c->blockio_device_weights) | |
79 | cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights); | |
80 | ||
81 | while (c->blockio_device_bandwidths) | |
82 | cgroup_context_free_blockio_device_bandwidth(c, c->blockio_device_bandwidths); | |
83 | ||
84 | while (c->device_allow) | |
85 | cgroup_context_free_device_allow(c, c->device_allow); | |
86 | } | |
87 | ||
88 | void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) { | |
89 | CGroupBlockIODeviceBandwidth *b; | |
90 | CGroupBlockIODeviceWeight *w; | |
91 | CGroupDeviceAllow *a; | |
9a054909 | 92 | char u[FORMAT_TIMESPAN_MAX]; |
4ad49000 LP |
93 | |
94 | assert(c); | |
95 | assert(f); | |
96 | ||
97 | prefix = strempty(prefix); | |
98 | ||
99 | fprintf(f, | |
100 | "%sCPUAccounting=%s\n" | |
101 | "%sBlockIOAccounting=%s\n" | |
102 | "%sMemoryAccounting=%s\n" | |
103 | "%sCPUShares=%lu\n" | |
95ae05c0 | 104 | "%sStartupCPUShares=%lu\n" |
b2f8b02e | 105 | "%sCPUQuotaPerSecSec=%s\n" |
112a7f46 | 106 | "%sBlockIOWeight=%lu\n" |
95ae05c0 | 107 | "%sStartupBlockIOWeight=%lu\n" |
4ad49000 | 108 | "%sMemoryLimit=%" PRIu64 "\n" |
a931ad47 LP |
109 | "%sDevicePolicy=%s\n" |
110 | "%sDelegate=%s\n", | |
4ad49000 LP |
111 | prefix, yes_no(c->cpu_accounting), |
112 | prefix, yes_no(c->blockio_accounting), | |
113 | prefix, yes_no(c->memory_accounting), | |
114 | prefix, c->cpu_shares, | |
95ae05c0 | 115 | prefix, c->startup_cpu_shares, |
b1d6dcf5 | 116 | prefix, format_timespan(u, sizeof(u), c->cpu_quota_per_sec_usec, 1), |
4ad49000 | 117 | prefix, c->blockio_weight, |
95ae05c0 | 118 | prefix, c->startup_blockio_weight, |
4ad49000 | 119 | prefix, c->memory_limit, |
a931ad47 LP |
120 | prefix, cgroup_device_policy_to_string(c->device_policy), |
121 | prefix, yes_no(c->delegate)); | |
4ad49000 LP |
122 | |
123 | LIST_FOREACH(device_allow, a, c->device_allow) | |
124 | fprintf(f, | |
125 | "%sDeviceAllow=%s %s%s%s\n", | |
126 | prefix, | |
127 | a->path, | |
128 | a->r ? "r" : "", a->w ? "w" : "", a->m ? "m" : ""); | |
129 | ||
130 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) | |
131 | fprintf(f, | |
8e7076ca | 132 | "%sBlockIODeviceWeight=%s %lu", |
4ad49000 LP |
133 | prefix, |
134 | w->path, | |
135 | w->weight); | |
136 | ||
137 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
138 | char buf[FORMAT_BYTES_MAX]; | |
139 | ||
140 | fprintf(f, | |
141 | "%s%s=%s %s\n", | |
142 | prefix, | |
143 | b->read ? "BlockIOReadBandwidth" : "BlockIOWriteBandwidth", | |
144 | b->path, | |
145 | format_bytes(buf, sizeof(buf), b->bandwidth)); | |
146 | } | |
147 | } | |
148 | ||
149 | static int lookup_blkio_device(const char *p, dev_t *dev) { | |
150 | struct stat st; | |
151 | int r; | |
152 | ||
153 | assert(p); | |
154 | assert(dev); | |
155 | ||
156 | r = stat(p, &st); | |
4a62c710 MS |
157 | if (r < 0) |
158 | return log_warning_errno(errno, "Couldn't stat device %s: %m", p); | |
8e274523 | 159 | |
4ad49000 LP |
160 | if (S_ISBLK(st.st_mode)) |
161 | *dev = st.st_rdev; | |
162 | else if (major(st.st_dev) != 0) { | |
163 | /* If this is not a device node then find the block | |
164 | * device this file is stored on */ | |
165 | *dev = st.st_dev; | |
166 | ||
167 | /* If this is a partition, try to get the originating | |
168 | * block device */ | |
169 | block_get_whole_disk(*dev, dev); | |
170 | } else { | |
171 | log_warning("%s is not a block device and file system block device cannot be determined or is not local.", p); | |
172 | return -ENODEV; | |
173 | } | |
8e274523 | 174 | |
8e274523 | 175 | return 0; |
8e274523 LP |
176 | } |
177 | ||
4ad49000 LP |
178 | static int whitelist_device(const char *path, const char *node, const char *acc) { |
179 | char buf[2+DECIMAL_STR_MAX(dev_t)*2+2+4]; | |
180 | struct stat st; | |
8c6db833 | 181 | int r; |
8e274523 | 182 | |
4ad49000 LP |
183 | assert(path); |
184 | assert(acc); | |
8e274523 | 185 | |
4ad49000 LP |
186 | if (stat(node, &st) < 0) { |
187 | log_warning("Couldn't stat device %s", node); | |
188 | return -errno; | |
189 | } | |
190 | ||
191 | if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { | |
192 | log_warning("%s is not a device.", node); | |
193 | return -ENODEV; | |
194 | } | |
195 | ||
196 | sprintf(buf, | |
197 | "%c %u:%u %s", | |
198 | S_ISCHR(st.st_mode) ? 'c' : 'b', | |
199 | major(st.st_rdev), minor(st.st_rdev), | |
200 | acc); | |
201 | ||
202 | r = cg_set_attribute("devices", path, "devices.allow", buf); | |
1aeab12b | 203 | if (r < 0) |
714e2e1d LP |
204 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL) ? LOG_DEBUG : LOG_WARNING, r, |
205 | "Failed to set devices.allow on %s: %m", path); | |
4ad49000 LP |
206 | |
207 | return r; | |
8e274523 LP |
208 | } |
209 | ||
90060676 LP |
210 | static int whitelist_major(const char *path, const char *name, char type, const char *acc) { |
211 | _cleanup_fclose_ FILE *f = NULL; | |
212 | char line[LINE_MAX]; | |
213 | bool good = false; | |
214 | int r; | |
215 | ||
216 | assert(path); | |
217 | assert(acc); | |
218 | assert(type == 'b' || type == 'c'); | |
219 | ||
220 | f = fopen("/proc/devices", "re"); | |
4a62c710 MS |
221 | if (!f) |
222 | return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s (%c): %m", name, type); | |
90060676 LP |
223 | |
224 | FOREACH_LINE(line, f, goto fail) { | |
225 | char buf[2+DECIMAL_STR_MAX(unsigned)+3+4], *p, *w; | |
226 | unsigned maj; | |
227 | ||
228 | truncate_nl(line); | |
229 | ||
230 | if (type == 'c' && streq(line, "Character devices:")) { | |
231 | good = true; | |
232 | continue; | |
233 | } | |
234 | ||
235 | if (type == 'b' && streq(line, "Block devices:")) { | |
236 | good = true; | |
237 | continue; | |
238 | } | |
239 | ||
240 | if (isempty(line)) { | |
241 | good = false; | |
242 | continue; | |
243 | } | |
244 | ||
245 | if (!good) | |
246 | continue; | |
247 | ||
248 | p = strstrip(line); | |
249 | ||
250 | w = strpbrk(p, WHITESPACE); | |
251 | if (!w) | |
252 | continue; | |
253 | *w = 0; | |
254 | ||
255 | r = safe_atou(p, &maj); | |
256 | if (r < 0) | |
257 | continue; | |
258 | if (maj <= 0) | |
259 | continue; | |
260 | ||
261 | w++; | |
262 | w += strspn(w, WHITESPACE); | |
e41969e3 LP |
263 | |
264 | if (fnmatch(name, w, 0) != 0) | |
90060676 LP |
265 | continue; |
266 | ||
267 | sprintf(buf, | |
268 | "%c %u:* %s", | |
269 | type, | |
270 | maj, | |
271 | acc); | |
272 | ||
273 | r = cg_set_attribute("devices", path, "devices.allow", buf); | |
1aeab12b | 274 | if (r < 0) |
714e2e1d LP |
275 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL) ? LOG_DEBUG : LOG_WARNING, r, |
276 | "Failed to set devices.allow on %s: %m", path); | |
90060676 LP |
277 | } |
278 | ||
279 | return 0; | |
280 | ||
281 | fail: | |
56f64d95 | 282 | log_warning_errno(errno, "Failed to read /proc/devices: %m"); |
90060676 LP |
283 | return -errno; |
284 | } | |
285 | ||
efdb0237 | 286 | void cgroup_context_apply(CGroupContext *c, CGroupMask mask, const char *path, ManagerState state) { |
01efdf13 | 287 | bool is_root; |
4ad49000 LP |
288 | int r; |
289 | ||
290 | assert(c); | |
291 | assert(path); | |
8e274523 | 292 | |
4ad49000 LP |
293 | if (mask == 0) |
294 | return; | |
8e274523 | 295 | |
71c26873 | 296 | /* Some cgroup attributes are not supported on the root cgroup, |
01efdf13 LP |
297 | * hence silently ignore */ |
298 | is_root = isempty(path) || path_equal(path, "/"); | |
6da13913 ZJS |
299 | if (is_root) |
300 | /* Make sure we don't try to display messages with an empty path. */ | |
301 | path = "/"; | |
01efdf13 | 302 | |
714e2e1d LP |
303 | /* We generally ignore errors caused by read-only mounted |
304 | * cgroup trees (assuming we are running in a container then), | |
305 | * and missing cgroups, i.e. EROFS and ENOENT. */ | |
306 | ||
efdb0237 | 307 | if ((mask & CGROUP_MASK_CPU) && !is_root) { |
b2f8b02e | 308 | char buf[MAX(DECIMAL_STR_MAX(unsigned long), DECIMAL_STR_MAX(usec_t)) + 1]; |
8e274523 | 309 | |
db785129 | 310 | sprintf(buf, "%lu\n", |
d81afec1 | 311 | IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && c->startup_cpu_shares != (unsigned long) -1 ? c->startup_cpu_shares : |
db785129 | 312 | c->cpu_shares != (unsigned long) -1 ? c->cpu_shares : 1024); |
4ad49000 | 313 | r = cg_set_attribute("cpu", path, "cpu.shares", buf); |
1aeab12b | 314 | if (r < 0) |
714e2e1d LP |
315 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
316 | "Failed to set cpu.shares on %s: %m", path); | |
b2f8b02e | 317 | |
9a054909 | 318 | sprintf(buf, USEC_FMT "\n", CGROUP_CPU_QUOTA_PERIOD_USEC); |
b2f8b02e | 319 | r = cg_set_attribute("cpu", path, "cpu.cfs_period_us", buf); |
1aeab12b | 320 | if (r < 0) |
714e2e1d LP |
321 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
322 | "Failed to set cpu.cfs_period_us on %s: %m", path); | |
b2f8b02e | 323 | |
3a43da28 | 324 | if (c->cpu_quota_per_sec_usec != USEC_INFINITY) { |
9a054909 | 325 | sprintf(buf, USEC_FMT "\n", c->cpu_quota_per_sec_usec * CGROUP_CPU_QUOTA_PERIOD_USEC / USEC_PER_SEC); |
b2f8b02e LP |
326 | r = cg_set_attribute("cpu", path, "cpu.cfs_quota_us", buf); |
327 | } else | |
328 | r = cg_set_attribute("cpu", path, "cpu.cfs_quota_us", "-1"); | |
1aeab12b | 329 | if (r < 0) |
714e2e1d LP |
330 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
331 | "Failed to set cpu.cfs_quota_us on %s: %m", path); | |
4ad49000 LP |
332 | } |
333 | ||
efdb0237 | 334 | if (mask & CGROUP_MASK_BLKIO) { |
4ad49000 LP |
335 | char buf[MAX3(DECIMAL_STR_MAX(unsigned long)+1, |
336 | DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(unsigned long)*1, | |
337 | DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1)]; | |
338 | CGroupBlockIODeviceWeight *w; | |
339 | CGroupBlockIODeviceBandwidth *b; | |
340 | ||
01efdf13 | 341 | if (!is_root) { |
d81afec1 | 342 | sprintf(buf, "%lu\n", IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && c->startup_blockio_weight != (unsigned long) -1 ? c->startup_blockio_weight : |
db785129 | 343 | c->blockio_weight != (unsigned long) -1 ? c->blockio_weight : 1000); |
01efdf13 | 344 | r = cg_set_attribute("blkio", path, "blkio.weight", buf); |
1aeab12b | 345 | if (r < 0) |
714e2e1d LP |
346 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
347 | "Failed to set blkio.weight on %s: %m", path); | |
4ad49000 | 348 | |
01efdf13 LP |
349 | /* FIXME: no way to reset this list */ |
350 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) { | |
351 | dev_t dev; | |
4ad49000 | 352 | |
01efdf13 LP |
353 | r = lookup_blkio_device(w->path, &dev); |
354 | if (r < 0) | |
355 | continue; | |
8e274523 | 356 | |
01efdf13 LP |
357 | sprintf(buf, "%u:%u %lu", major(dev), minor(dev), w->weight); |
358 | r = cg_set_attribute("blkio", path, "blkio.weight_device", buf); | |
1aeab12b | 359 | if (r < 0) |
714e2e1d LP |
360 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
361 | "Failed to set blkio.weight_device on %s: %m", path); | |
01efdf13 | 362 | } |
4ad49000 LP |
363 | } |
364 | ||
365 | /* FIXME: no way to reset this list */ | |
366 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
367 | const char *a; | |
368 | dev_t dev; | |
369 | ||
370 | r = lookup_blkio_device(b->path, &dev); | |
371 | if (r < 0) | |
372 | continue; | |
373 | ||
374 | a = b->read ? "blkio.throttle.read_bps_device" : "blkio.throttle.write_bps_device"; | |
375 | ||
376 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), b->bandwidth); | |
377 | r = cg_set_attribute("blkio", path, a, buf); | |
1aeab12b | 378 | if (r < 0) |
714e2e1d LP |
379 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
380 | "Failed to set %s on %s: %m", a, path); | |
d686d8a9 | 381 | } |
8e274523 LP |
382 | } |
383 | ||
efdb0237 | 384 | if ((mask & CGROUP_MASK_MEMORY) && !is_root) { |
6a94f2e9 | 385 | if (c->memory_limit != (uint64_t) -1) { |
e58cec11 LP |
386 | char buf[DECIMAL_STR_MAX(uint64_t) + 1]; |
387 | ||
6a94f2e9 | 388 | sprintf(buf, "%" PRIu64 "\n", c->memory_limit); |
efdb0237 LP |
389 | |
390 | if (cg_unified() <= 0) | |
391 | r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf); | |
392 | else | |
393 | r = cg_set_attribute("memory", path, "memory.max", buf); | |
394 | ||
395 | } else { | |
396 | if (cg_unified() <= 0) | |
397 | r = cg_set_attribute("memory", path, "memory.limit_in_bytes", "-1"); | |
398 | else | |
399 | r = cg_set_attribute("memory", path, "memory.max", "max"); | |
400 | } | |
8e274523 | 401 | |
1aeab12b | 402 | if (r < 0) |
714e2e1d | 403 | log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, |
efdb0237 | 404 | "Failed to set memory.limit_in_bytes/memory.max on %s: %m", path); |
4ad49000 | 405 | } |
8e274523 | 406 | |
efdb0237 | 407 | if ((mask & CGROUP_MASK_DEVICE) && !is_root) { |
4ad49000 | 408 | CGroupDeviceAllow *a; |
8e274523 | 409 | |
714e2e1d LP |
410 | /* Changing the devices list of a populated cgroup |
411 | * might result in EINVAL, hence ignore EINVAL | |
412 | * here. */ | |
413 | ||
4ad49000 LP |
414 | if (c->device_allow || c->device_policy != CGROUP_AUTO) |
415 | r = cg_set_attribute("devices", path, "devices.deny", "a"); | |
416 | else | |
417 | r = cg_set_attribute("devices", path, "devices.allow", "a"); | |
1aeab12b | 418 | if (r < 0) |
714e2e1d LP |
419 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL) ? LOG_DEBUG : LOG_WARNING, r, |
420 | "Failed to reset devices.list on %s: %m", path); | |
fb385181 | 421 | |
4ad49000 LP |
422 | if (c->device_policy == CGROUP_CLOSED || |
423 | (c->device_policy == CGROUP_AUTO && c->device_allow)) { | |
424 | static const char auto_devices[] = | |
7d711efb LP |
425 | "/dev/null\0" "rwm\0" |
426 | "/dev/zero\0" "rwm\0" | |
427 | "/dev/full\0" "rwm\0" | |
428 | "/dev/random\0" "rwm\0" | |
429 | "/dev/urandom\0" "rwm\0" | |
430 | "/dev/tty\0" "rwm\0" | |
431 | "/dev/pts/ptmx\0" "rw\0"; /* /dev/pts/ptmx may not be duplicated, but accessed */ | |
4ad49000 LP |
432 | |
433 | const char *x, *y; | |
434 | ||
435 | NULSTR_FOREACH_PAIR(x, y, auto_devices) | |
436 | whitelist_device(path, x, y); | |
7d711efb LP |
437 | |
438 | whitelist_major(path, "pts", 'c', "rw"); | |
439 | whitelist_major(path, "kdbus", 'c', "rw"); | |
440 | whitelist_major(path, "kdbus/*", 'c', "rw"); | |
4ad49000 LP |
441 | } |
442 | ||
443 | LIST_FOREACH(device_allow, a, c->device_allow) { | |
444 | char acc[4]; | |
445 | unsigned k = 0; | |
446 | ||
447 | if (a->r) | |
448 | acc[k++] = 'r'; | |
449 | if (a->w) | |
450 | acc[k++] = 'w'; | |
451 | if (a->m) | |
452 | acc[k++] = 'm'; | |
fb385181 | 453 | |
4ad49000 LP |
454 | if (k == 0) |
455 | continue; | |
fb385181 | 456 | |
4ad49000 | 457 | acc[k++] = 0; |
90060676 LP |
458 | |
459 | if (startswith(a->path, "/dev/")) | |
460 | whitelist_device(path, a->path, acc); | |
461 | else if (startswith(a->path, "block-")) | |
462 | whitelist_major(path, a->path + 6, 'b', acc); | |
463 | else if (startswith(a->path, "char-")) | |
464 | whitelist_major(path, a->path + 5, 'c', acc); | |
465 | else | |
466 | log_debug("Ignoring device %s while writing cgroup attribute.", a->path); | |
4ad49000 LP |
467 | } |
468 | } | |
fb385181 LP |
469 | } |
470 | ||
efdb0237 LP |
471 | CGroupMask cgroup_context_get_mask(CGroupContext *c) { |
472 | CGroupMask mask = 0; | |
8e274523 | 473 | |
4ad49000 | 474 | /* Figure out which controllers we need */ |
8e274523 | 475 | |
b2f8b02e | 476 | if (c->cpu_accounting || |
db785129 LP |
477 | c->cpu_shares != (unsigned long) -1 || |
478 | c->startup_cpu_shares != (unsigned long) -1 || | |
3a43da28 | 479 | c->cpu_quota_per_sec_usec != USEC_INFINITY) |
efdb0237 | 480 | mask |= CGROUP_MASK_CPUACCT | CGROUP_MASK_CPU; |
ecedd90f | 481 | |
4ad49000 | 482 | if (c->blockio_accounting || |
db785129 LP |
483 | c->blockio_weight != (unsigned long) -1 || |
484 | c->startup_blockio_weight != (unsigned long) -1 || | |
4ad49000 | 485 | c->blockio_device_weights || |
db785129 | 486 | c->blockio_device_bandwidths) |
efdb0237 | 487 | mask |= CGROUP_MASK_BLKIO; |
ecedd90f | 488 | |
4ad49000 | 489 | if (c->memory_accounting || |
ddca82ac | 490 | c->memory_limit != (uint64_t) -1) |
efdb0237 | 491 | mask |= CGROUP_MASK_MEMORY; |
8e274523 | 492 | |
a931ad47 LP |
493 | if (c->device_allow || |
494 | c->device_policy != CGROUP_AUTO) | |
efdb0237 | 495 | mask |= CGROUP_MASK_DEVICE; |
4ad49000 LP |
496 | |
497 | return mask; | |
8e274523 LP |
498 | } |
499 | ||
efdb0237 | 500 | CGroupMask unit_get_own_mask(Unit *u) { |
4ad49000 | 501 | CGroupContext *c; |
8e274523 | 502 | |
efdb0237 LP |
503 | /* Returns the mask of controllers the unit needs for itself */ |
504 | ||
4ad49000 LP |
505 | c = unit_get_cgroup_context(u); |
506 | if (!c) | |
507 | return 0; | |
8e274523 | 508 | |
a931ad47 | 509 | /* If delegation is turned on, then turn on all cgroups, |
19af675e LP |
510 | * unless we are on the legacy hierarchy and the process we |
511 | * fork into it is known to drop privileges, and hence | |
512 | * shouldn't get access to the controllers. | |
513 | * | |
514 | * Note that on the unified hierarchy it is safe to delegate | |
515 | * controllers to unprivileged services. */ | |
a931ad47 LP |
516 | |
517 | if (c->delegate) { | |
518 | ExecContext *e; | |
519 | ||
520 | e = unit_get_exec_context(u); | |
19af675e LP |
521 | if (!e || |
522 | exec_context_maintains_privileges(e) || | |
523 | cg_unified() > 0) | |
efdb0237 | 524 | return _CGROUP_MASK_ALL; |
a931ad47 LP |
525 | } |
526 | ||
db785129 | 527 | return cgroup_context_get_mask(c); |
8e274523 LP |
528 | } |
529 | ||
efdb0237 | 530 | CGroupMask unit_get_members_mask(Unit *u) { |
4ad49000 | 531 | assert(u); |
bc432dc7 | 532 | |
efdb0237 LP |
533 | /* Returns the mask of controllers all of the unit's children |
534 | * require, merged */ | |
535 | ||
bc432dc7 LP |
536 | if (u->cgroup_members_mask_valid) |
537 | return u->cgroup_members_mask; | |
538 | ||
539 | u->cgroup_members_mask = 0; | |
540 | ||
541 | if (u->type == UNIT_SLICE) { | |
542 | Unit *member; | |
543 | Iterator i; | |
544 | ||
545 | SET_FOREACH(member, u->dependencies[UNIT_BEFORE], i) { | |
546 | ||
547 | if (member == u) | |
548 | continue; | |
549 | ||
d4fdc205 | 550 | if (UNIT_DEREF(member->slice) != u) |
bc432dc7 LP |
551 | continue; |
552 | ||
553 | u->cgroup_members_mask |= | |
efdb0237 | 554 | unit_get_own_mask(member) | |
bc432dc7 LP |
555 | unit_get_members_mask(member); |
556 | } | |
557 | } | |
558 | ||
559 | u->cgroup_members_mask_valid = true; | |
6414b7c9 | 560 | return u->cgroup_members_mask; |
246aa6dd LP |
561 | } |
562 | ||
efdb0237 | 563 | CGroupMask unit_get_siblings_mask(Unit *u) { |
4ad49000 | 564 | assert(u); |
246aa6dd | 565 | |
efdb0237 LP |
566 | /* Returns the mask of controllers all of the unit's siblings |
567 | * require, i.e. the members mask of the unit's parent slice | |
568 | * if there is one. */ | |
569 | ||
bc432dc7 | 570 | if (UNIT_ISSET(u->slice)) |
637f421e | 571 | return unit_get_members_mask(UNIT_DEREF(u->slice)); |
4ad49000 | 572 | |
efdb0237 | 573 | return unit_get_own_mask(u) | unit_get_members_mask(u); |
246aa6dd LP |
574 | } |
575 | ||
efdb0237 LP |
576 | CGroupMask unit_get_subtree_mask(Unit *u) { |
577 | ||
578 | /* Returns the mask of this subtree, meaning of the group | |
579 | * itself and its children. */ | |
580 | ||
581 | return unit_get_own_mask(u) | unit_get_members_mask(u); | |
582 | } | |
583 | ||
584 | CGroupMask unit_get_target_mask(Unit *u) { | |
585 | CGroupMask mask; | |
586 | ||
587 | /* This returns the cgroup mask of all controllers to enable | |
588 | * for a specific cgroup, i.e. everything it needs itself, | |
589 | * plus all that its children need, plus all that its siblings | |
590 | * need. This is primarily useful on the legacy cgroup | |
591 | * hierarchy, where we need to duplicate each cgroup in each | |
592 | * hierarchy that shall be enabled for it. */ | |
6414b7c9 | 593 | |
efdb0237 LP |
594 | mask = unit_get_own_mask(u) | unit_get_members_mask(u) | unit_get_siblings_mask(u); |
595 | mask &= u->manager->cgroup_supported; | |
596 | ||
597 | return mask; | |
598 | } | |
599 | ||
600 | CGroupMask unit_get_enable_mask(Unit *u) { | |
601 | CGroupMask mask; | |
602 | ||
603 | /* This returns the cgroup mask of all controllers to enable | |
604 | * for the children of a specific cgroup. This is primarily | |
605 | * useful for the unified cgroup hierarchy, where each cgroup | |
606 | * controls which controllers are enabled for its children. */ | |
607 | ||
608 | mask = unit_get_members_mask(u); | |
6414b7c9 DS |
609 | mask &= u->manager->cgroup_supported; |
610 | ||
611 | return mask; | |
612 | } | |
613 | ||
614 | /* Recurse from a unit up through its containing slices, propagating | |
615 | * mask bits upward. A unit is also member of itself. */ | |
bc432dc7 | 616 | void unit_update_cgroup_members_masks(Unit *u) { |
efdb0237 | 617 | CGroupMask m; |
bc432dc7 LP |
618 | bool more; |
619 | ||
620 | assert(u); | |
621 | ||
622 | /* Calculate subtree mask */ | |
efdb0237 | 623 | m = unit_get_subtree_mask(u); |
bc432dc7 LP |
624 | |
625 | /* See if anything changed from the previous invocation. If | |
626 | * not, we're done. */ | |
627 | if (u->cgroup_subtree_mask_valid && m == u->cgroup_subtree_mask) | |
628 | return; | |
629 | ||
630 | more = | |
631 | u->cgroup_subtree_mask_valid && | |
632 | ((m & ~u->cgroup_subtree_mask) != 0) && | |
633 | ((~m & u->cgroup_subtree_mask) == 0); | |
634 | ||
635 | u->cgroup_subtree_mask = m; | |
636 | u->cgroup_subtree_mask_valid = true; | |
637 | ||
6414b7c9 DS |
638 | if (UNIT_ISSET(u->slice)) { |
639 | Unit *s = UNIT_DEREF(u->slice); | |
bc432dc7 LP |
640 | |
641 | if (more) | |
642 | /* There's more set now than before. We | |
643 | * propagate the new mask to the parent's mask | |
644 | * (not caring if it actually was valid or | |
645 | * not). */ | |
646 | ||
647 | s->cgroup_members_mask |= m; | |
648 | ||
649 | else | |
650 | /* There's less set now than before (or we | |
651 | * don't know), we need to recalculate | |
652 | * everything, so let's invalidate the | |
653 | * parent's members mask */ | |
654 | ||
655 | s->cgroup_members_mask_valid = false; | |
656 | ||
657 | /* And now make sure that this change also hits our | |
658 | * grandparents */ | |
659 | unit_update_cgroup_members_masks(s); | |
6414b7c9 DS |
660 | } |
661 | } | |
662 | ||
efdb0237 | 663 | static const char *migrate_callback(CGroupMask mask, void *userdata) { |
03b90d4b LP |
664 | Unit *u = userdata; |
665 | ||
666 | assert(mask != 0); | |
667 | assert(u); | |
668 | ||
669 | while (u) { | |
670 | if (u->cgroup_path && | |
671 | u->cgroup_realized && | |
672 | (u->cgroup_realized_mask & mask) == mask) | |
673 | return u->cgroup_path; | |
674 | ||
675 | u = UNIT_DEREF(u->slice); | |
676 | } | |
677 | ||
678 | return NULL; | |
679 | } | |
680 | ||
efdb0237 LP |
681 | char *unit_default_cgroup_path(Unit *u) { |
682 | _cleanup_free_ char *escaped = NULL, *slice = NULL; | |
683 | int r; | |
684 | ||
685 | assert(u); | |
686 | ||
687 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
688 | return strdup(u->manager->cgroup_root); | |
689 | ||
690 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
691 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); | |
692 | if (r < 0) | |
693 | return NULL; | |
694 | } | |
695 | ||
696 | escaped = cg_escape(u->id); | |
697 | if (!escaped) | |
698 | return NULL; | |
699 | ||
700 | if (slice) | |
701 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
702 | else | |
703 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
704 | } | |
705 | ||
706 | int unit_set_cgroup_path(Unit *u, const char *path) { | |
707 | _cleanup_free_ char *p = NULL; | |
708 | int r; | |
709 | ||
710 | assert(u); | |
711 | ||
712 | if (path) { | |
713 | p = strdup(path); | |
714 | if (!p) | |
715 | return -ENOMEM; | |
716 | } else | |
717 | p = NULL; | |
718 | ||
719 | if (streq_ptr(u->cgroup_path, p)) | |
720 | return 0; | |
721 | ||
722 | if (p) { | |
723 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
724 | if (r < 0) | |
725 | return r; | |
726 | } | |
727 | ||
728 | unit_release_cgroup(u); | |
729 | ||
730 | u->cgroup_path = p; | |
731 | p = NULL; | |
732 | ||
733 | return 1; | |
734 | } | |
735 | ||
736 | int unit_watch_cgroup(Unit *u) { | |
737 | _cleanup_free_ char *populated = NULL; | |
738 | int r; | |
739 | ||
740 | assert(u); | |
741 | ||
742 | if (!u->cgroup_path) | |
743 | return 0; | |
744 | ||
745 | if (u->cgroup_inotify_wd >= 0) | |
746 | return 0; | |
747 | ||
748 | /* Only applies to the unified hierarchy */ | |
749 | r = cg_unified(); | |
750 | if (r < 0) | |
751 | return log_unit_error_errno(u, r, "Failed detect wether the unified hierarchy is used: %m"); | |
752 | if (r == 0) | |
753 | return 0; | |
754 | ||
755 | /* Don't watch the root slice, it's pointless. */ | |
756 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
757 | return 0; | |
758 | ||
759 | r = hashmap_ensure_allocated(&u->manager->cgroup_inotify_wd_unit, &trivial_hash_ops); | |
760 | if (r < 0) | |
761 | return log_oom(); | |
762 | ||
763 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.populated", &populated); | |
764 | if (r < 0) | |
765 | return log_oom(); | |
766 | ||
767 | u->cgroup_inotify_wd = inotify_add_watch(u->manager->cgroup_inotify_fd, populated, IN_MODIFY); | |
768 | if (u->cgroup_inotify_wd < 0) { | |
769 | ||
770 | if (errno == ENOENT) /* If the directory is already | |
771 | * gone we don't need to track | |
772 | * it, so this is not an error */ | |
773 | return 0; | |
774 | ||
775 | return log_unit_error_errno(u, errno, "Failed to add inotify watch descriptor for control group %s: %m", u->cgroup_path); | |
776 | } | |
777 | ||
778 | r = hashmap_put(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd), u); | |
779 | if (r < 0) | |
780 | return log_unit_error_errno(u, r, "Failed to add inotify watch descriptor to hash map: %m"); | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | static int unit_create_cgroup( | |
786 | Unit *u, | |
787 | CGroupMask target_mask, | |
788 | CGroupMask enable_mask) { | |
789 | ||
0cd385d3 | 790 | CGroupContext *c; |
bc432dc7 | 791 | int r; |
64747e2d | 792 | |
4ad49000 | 793 | assert(u); |
64747e2d | 794 | |
0cd385d3 LP |
795 | c = unit_get_cgroup_context(u); |
796 | if (!c) | |
797 | return 0; | |
798 | ||
7b3fd631 LP |
799 | if (!u->cgroup_path) { |
800 | _cleanup_free_ char *path = NULL; | |
64747e2d | 801 | |
7b3fd631 LP |
802 | path = unit_default_cgroup_path(u); |
803 | if (!path) | |
804 | return log_oom(); | |
805 | ||
efdb0237 LP |
806 | r = unit_set_cgroup_path(u, path); |
807 | if (r == -EEXIST) | |
808 | return log_unit_error_errno(u, r, "Control group %s exists already.", path); | |
809 | if (r < 0) | |
810 | return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", path); | |
b58b8e11 HH |
811 | } |
812 | ||
03b90d4b | 813 | /* First, create our own group */ |
efdb0237 | 814 | r = cg_create_everywhere(u->manager->cgroup_supported, target_mask, u->cgroup_path); |
23bbb0de | 815 | if (r < 0) |
efdb0237 LP |
816 | return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", u->cgroup_path); |
817 | ||
818 | /* Start watching it */ | |
819 | (void) unit_watch_cgroup(u); | |
820 | ||
821 | /* Enable all controllers we need */ | |
822 | r = cg_enable_everywhere(u->manager->cgroup_supported, enable_mask, u->cgroup_path); | |
823 | if (r < 0) | |
824 | log_unit_warning_errno(u, r, "Failed to enable controllers on cgroup %s, ignoring: %m", u->cgroup_path); | |
03b90d4b LP |
825 | |
826 | /* Keep track that this is now realized */ | |
4ad49000 | 827 | u->cgroup_realized = true; |
efdb0237 | 828 | u->cgroup_realized_mask = target_mask; |
4ad49000 | 829 | |
0cd385d3 LP |
830 | if (u->type != UNIT_SLICE && !c->delegate) { |
831 | ||
832 | /* Then, possibly move things over, but not if | |
833 | * subgroups may contain processes, which is the case | |
834 | * for slice and delegation units. */ | |
835 | r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->cgroup_path, migrate_callback, u); | |
836 | if (r < 0) | |
efdb0237 | 837 | log_unit_warning_errno(u, r, "Failed to migrate cgroup from to %s, ignoring: %m", u->cgroup_path); |
0cd385d3 | 838 | } |
03b90d4b | 839 | |
64747e2d LP |
840 | return 0; |
841 | } | |
842 | ||
7b3fd631 LP |
843 | int unit_attach_pids_to_cgroup(Unit *u) { |
844 | int r; | |
845 | assert(u); | |
846 | ||
847 | r = unit_realize_cgroup(u); | |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
851 | r = cg_attach_many_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->pids, migrate_callback, u); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
efdb0237 | 858 | static bool unit_has_mask_realized(Unit *u, CGroupMask target_mask) { |
bc432dc7 LP |
859 | assert(u); |
860 | ||
efdb0237 | 861 | return u->cgroup_realized && u->cgroup_realized_mask == target_mask; |
6414b7c9 DS |
862 | } |
863 | ||
864 | /* Check if necessary controllers and attributes for a unit are in place. | |
865 | * | |
866 | * If so, do nothing. | |
867 | * If not, create paths, move processes over, and set attributes. | |
868 | * | |
869 | * Returns 0 on success and < 0 on failure. */ | |
db785129 | 870 | static int unit_realize_cgroup_now(Unit *u, ManagerState state) { |
efdb0237 | 871 | CGroupMask target_mask, enable_mask; |
6414b7c9 | 872 | int r; |
64747e2d | 873 | |
4ad49000 | 874 | assert(u); |
64747e2d | 875 | |
4ad49000 | 876 | if (u->in_cgroup_queue) { |
71fda00f | 877 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
4ad49000 LP |
878 | u->in_cgroup_queue = false; |
879 | } | |
64747e2d | 880 | |
efdb0237 LP |
881 | target_mask = unit_get_target_mask(u); |
882 | if (unit_has_mask_realized(u, target_mask)) | |
0a1eb06d | 883 | return 0; |
64747e2d | 884 | |
4ad49000 | 885 | /* First, realize parents */ |
6414b7c9 | 886 | if (UNIT_ISSET(u->slice)) { |
db785129 | 887 | r = unit_realize_cgroup_now(UNIT_DEREF(u->slice), state); |
6414b7c9 DS |
888 | if (r < 0) |
889 | return r; | |
890 | } | |
4ad49000 LP |
891 | |
892 | /* And then do the real work */ | |
efdb0237 LP |
893 | enable_mask = unit_get_enable_mask(u); |
894 | r = unit_create_cgroup(u, target_mask, enable_mask); | |
6414b7c9 DS |
895 | if (r < 0) |
896 | return r; | |
897 | ||
898 | /* Finally, apply the necessary attributes. */ | |
efdb0237 | 899 | cgroup_context_apply(unit_get_cgroup_context(u), target_mask, u->cgroup_path, state); |
6414b7c9 DS |
900 | |
901 | return 0; | |
64747e2d LP |
902 | } |
903 | ||
4ad49000 | 904 | static void unit_add_to_cgroup_queue(Unit *u) { |
ecedd90f | 905 | |
4ad49000 LP |
906 | if (u->in_cgroup_queue) |
907 | return; | |
8e274523 | 908 | |
71fda00f | 909 | LIST_PREPEND(cgroup_queue, u->manager->cgroup_queue, u); |
4ad49000 LP |
910 | u->in_cgroup_queue = true; |
911 | } | |
8c6db833 | 912 | |
4ad49000 | 913 | unsigned manager_dispatch_cgroup_queue(Manager *m) { |
db785129 | 914 | ManagerState state; |
4ad49000 | 915 | unsigned n = 0; |
db785129 | 916 | Unit *i; |
6414b7c9 | 917 | int r; |
ecedd90f | 918 | |
db785129 LP |
919 | state = manager_state(m); |
920 | ||
4ad49000 LP |
921 | while ((i = m->cgroup_queue)) { |
922 | assert(i->in_cgroup_queue); | |
ecedd90f | 923 | |
db785129 | 924 | r = unit_realize_cgroup_now(i, state); |
6414b7c9 | 925 | if (r < 0) |
efdb0237 | 926 | log_warning_errno(r, "Failed to realize cgroups for queued unit %s, ignoring: %m", i->id); |
0a1eb06d | 927 | |
4ad49000 LP |
928 | n++; |
929 | } | |
ecedd90f | 930 | |
4ad49000 | 931 | return n; |
8e274523 LP |
932 | } |
933 | ||
4ad49000 LP |
934 | static void unit_queue_siblings(Unit *u) { |
935 | Unit *slice; | |
ca949c9d | 936 | |
4ad49000 LP |
937 | /* This adds the siblings of the specified unit and the |
938 | * siblings of all parent units to the cgroup queue. (But | |
939 | * neither the specified unit itself nor the parents.) */ | |
940 | ||
941 | while ((slice = UNIT_DEREF(u->slice))) { | |
942 | Iterator i; | |
943 | Unit *m; | |
8f53a7b8 | 944 | |
4ad49000 LP |
945 | SET_FOREACH(m, slice->dependencies[UNIT_BEFORE], i) { |
946 | if (m == u) | |
947 | continue; | |
8e274523 | 948 | |
6414b7c9 DS |
949 | /* Skip units that have a dependency on the slice |
950 | * but aren't actually in it. */ | |
4ad49000 | 951 | if (UNIT_DEREF(m->slice) != slice) |
50159e6a | 952 | continue; |
8e274523 | 953 | |
6414b7c9 DS |
954 | /* No point in doing cgroup application for units |
955 | * without active processes. */ | |
956 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(m))) | |
957 | continue; | |
958 | ||
959 | /* If the unit doesn't need any new controllers | |
960 | * and has current ones realized, it doesn't need | |
961 | * any changes. */ | |
962 | if (unit_has_mask_realized(m, unit_get_target_mask(m))) | |
963 | continue; | |
964 | ||
4ad49000 | 965 | unit_add_to_cgroup_queue(m); |
50159e6a LP |
966 | } |
967 | ||
4ad49000 | 968 | u = slice; |
8e274523 | 969 | } |
4ad49000 LP |
970 | } |
971 | ||
0a1eb06d | 972 | int unit_realize_cgroup(Unit *u) { |
4ad49000 LP |
973 | assert(u); |
974 | ||
35b7ff80 | 975 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
0a1eb06d | 976 | return 0; |
8e274523 | 977 | |
4ad49000 LP |
978 | /* So, here's the deal: when realizing the cgroups for this |
979 | * unit, we need to first create all parents, but there's more | |
980 | * actually: for the weight-based controllers we also need to | |
981 | * make sure that all our siblings (i.e. units that are in the | |
73e231ab | 982 | * same slice as we are) have cgroups, too. Otherwise, things |
4ad49000 LP |
983 | * would become very uneven as each of their processes would |
984 | * get as much resources as all our group together. This call | |
985 | * will synchronously create the parent cgroups, but will | |
986 | * defer work on the siblings to the next event loop | |
987 | * iteration. */ | |
ca949c9d | 988 | |
4ad49000 LP |
989 | /* Add all sibling slices to the cgroup queue. */ |
990 | unit_queue_siblings(u); | |
991 | ||
6414b7c9 | 992 | /* And realize this one now (and apply the values) */ |
db785129 | 993 | return unit_realize_cgroup_now(u, manager_state(u->manager)); |
8e274523 LP |
994 | } |
995 | ||
efdb0237 LP |
996 | void unit_release_cgroup(Unit *u) { |
997 | assert(u); | |
998 | ||
999 | /* Forgets all cgroup details for this cgroup */ | |
1000 | ||
1001 | if (u->cgroup_path) { | |
1002 | (void) hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
1003 | u->cgroup_path = mfree(u->cgroup_path); | |
1004 | } | |
1005 | ||
1006 | if (u->cgroup_inotify_wd >= 0) { | |
1007 | if (inotify_rm_watch(u->manager->cgroup_inotify_fd, u->cgroup_inotify_wd) < 0) | |
1008 | log_unit_debug_errno(u, errno, "Failed to remove cgroup inotify watch %i for %s, ignoring", u->cgroup_inotify_wd, u->id); | |
1009 | ||
1010 | (void) hashmap_remove(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd)); | |
1011 | u->cgroup_inotify_wd = -1; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | void unit_prune_cgroup(Unit *u) { | |
8e274523 | 1016 | int r; |
efdb0237 | 1017 | bool is_root_slice; |
8e274523 | 1018 | |
4ad49000 | 1019 | assert(u); |
8e274523 | 1020 | |
efdb0237 LP |
1021 | /* Removes the cgroup, if empty and possible, and stops watching it. */ |
1022 | ||
4ad49000 LP |
1023 | if (!u->cgroup_path) |
1024 | return; | |
8e274523 | 1025 | |
efdb0237 LP |
1026 | is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE); |
1027 | ||
1028 | r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !is_root_slice); | |
dab5bf85 | 1029 | if (r < 0) { |
efdb0237 | 1030 | log_debug_errno(r, "Failed to destroy cgroup %s, ignoring: %m", u->cgroup_path); |
dab5bf85 RL |
1031 | return; |
1032 | } | |
8e274523 | 1033 | |
efdb0237 LP |
1034 | if (is_root_slice) |
1035 | return; | |
1036 | ||
1037 | unit_release_cgroup(u); | |
0a1eb06d | 1038 | |
4ad49000 | 1039 | u->cgroup_realized = false; |
bc432dc7 | 1040 | u->cgroup_realized_mask = 0; |
8e274523 LP |
1041 | } |
1042 | ||
efdb0237 | 1043 | int unit_search_main_pid(Unit *u, pid_t *ret) { |
4ad49000 LP |
1044 | _cleanup_fclose_ FILE *f = NULL; |
1045 | pid_t pid = 0, npid, mypid; | |
efdb0237 | 1046 | int r; |
4ad49000 LP |
1047 | |
1048 | assert(u); | |
efdb0237 | 1049 | assert(ret); |
4ad49000 LP |
1050 | |
1051 | if (!u->cgroup_path) | |
efdb0237 | 1052 | return -ENXIO; |
4ad49000 | 1053 | |
efdb0237 LP |
1054 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &f); |
1055 | if (r < 0) | |
1056 | return r; | |
4ad49000 LP |
1057 | |
1058 | mypid = getpid(); | |
1059 | while (cg_read_pid(f, &npid) > 0) { | |
1060 | pid_t ppid; | |
1061 | ||
1062 | if (npid == pid) | |
1063 | continue; | |
8e274523 | 1064 | |
4ad49000 LP |
1065 | /* Ignore processes that aren't our kids */ |
1066 | if (get_parent_of_pid(npid, &ppid) >= 0 && ppid != mypid) | |
1067 | continue; | |
8e274523 | 1068 | |
efdb0237 | 1069 | if (pid != 0) |
4ad49000 LP |
1070 | /* Dang, there's more than one daemonized PID |
1071 | in this group, so we don't know what process | |
1072 | is the main process. */ | |
efdb0237 LP |
1073 | |
1074 | return -ENODATA; | |
8e274523 | 1075 | |
4ad49000 | 1076 | pid = npid; |
8e274523 LP |
1077 | } |
1078 | ||
efdb0237 LP |
1079 | *ret = pid; |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
b3c5bad3 | 1084 | _cleanup_closedir_ DIR *d = NULL; |
efdb0237 LP |
1085 | _cleanup_fclose_ FILE *f = NULL; |
1086 | int ret = 0, r; | |
1087 | ||
1088 | assert(u); | |
1089 | assert(path); | |
1090 | ||
1091 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1092 | if (r < 0) | |
1093 | ret = r; | |
1094 | else { | |
1095 | pid_t pid; | |
1096 | ||
1097 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1098 | r = unit_watch_pid(u, pid); | |
1099 | if (r < 0 && ret >= 0) | |
1100 | ret = r; | |
1101 | } | |
1102 | ||
1103 | if (r < 0 && ret >= 0) | |
1104 | ret = r; | |
1105 | } | |
1106 | ||
1107 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1108 | if (r < 0) { | |
1109 | if (ret >= 0) | |
1110 | ret = r; | |
1111 | } else { | |
1112 | char *fn; | |
1113 | ||
1114 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1115 | _cleanup_free_ char *p = NULL; | |
1116 | ||
1117 | p = strjoin(path, "/", fn, NULL); | |
1118 | free(fn); | |
1119 | ||
1120 | if (!p) | |
1121 | return -ENOMEM; | |
1122 | ||
1123 | r = unit_watch_pids_in_path(u, p); | |
1124 | if (r < 0 && ret >= 0) | |
1125 | ret = r; | |
1126 | } | |
1127 | ||
1128 | if (r < 0 && ret >= 0) | |
1129 | ret = r; | |
1130 | } | |
1131 | ||
1132 | return ret; | |
1133 | } | |
1134 | ||
1135 | int unit_watch_all_pids(Unit *u) { | |
1136 | assert(u); | |
1137 | ||
1138 | /* Adds all PIDs from our cgroup to the set of PIDs we | |
1139 | * watch. This is a fallback logic for cases where we do not | |
1140 | * get reliable cgroup empty notifications: we try to use | |
1141 | * SIGCHLD as replacement. */ | |
1142 | ||
1143 | if (!u->cgroup_path) | |
1144 | return -ENOENT; | |
1145 | ||
1146 | if (cg_unified() > 0) /* On unified we can use proper notifications */ | |
1147 | return 0; | |
1148 | ||
1149 | return unit_watch_pids_in_path(u, u->cgroup_path); | |
1150 | } | |
1151 | ||
1152 | int unit_notify_cgroup_empty(Unit *u) { | |
1153 | int r; | |
1154 | ||
1155 | assert(u); | |
1156 | ||
1157 | if (!u->cgroup_path) | |
1158 | return 0; | |
1159 | ||
1160 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
1161 | if (r <= 0) | |
1162 | return r; | |
1163 | ||
1164 | unit_add_to_gc_queue(u); | |
1165 | ||
1166 | if (UNIT_VTABLE(u)->notify_cgroup_empty) | |
1167 | UNIT_VTABLE(u)->notify_cgroup_empty(u); | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
1173 | Manager *m = userdata; | |
1174 | ||
1175 | assert(s); | |
1176 | assert(fd >= 0); | |
1177 | assert(m); | |
1178 | ||
1179 | for (;;) { | |
1180 | union inotify_event_buffer buffer; | |
1181 | struct inotify_event *e; | |
1182 | ssize_t l; | |
1183 | ||
1184 | l = read(fd, &buffer, sizeof(buffer)); | |
1185 | if (l < 0) { | |
1186 | if (errno == EINTR || errno == EAGAIN) | |
1187 | return 0; | |
1188 | ||
1189 | return log_error_errno(errno, "Failed to read control group inotify events: %m"); | |
1190 | } | |
1191 | ||
1192 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
1193 | Unit *u; | |
1194 | ||
1195 | if (e->wd < 0) | |
1196 | /* Queue overflow has no watch descriptor */ | |
1197 | continue; | |
1198 | ||
1199 | if (e->mask & IN_IGNORED) | |
1200 | /* The watch was just removed */ | |
1201 | continue; | |
1202 | ||
1203 | u = hashmap_get(m->cgroup_inotify_wd_unit, INT_TO_PTR(e->wd)); | |
1204 | if (!u) /* Not that inotify might deliver | |
1205 | * events for a watch even after it | |
1206 | * was removed, because it was queued | |
1207 | * before the removal. Let's ignore | |
1208 | * this here safely. */ | |
1209 | continue; | |
1210 | ||
1211 | (void) unit_notify_cgroup_empty(u); | |
1212 | } | |
1213 | } | |
8e274523 LP |
1214 | } |
1215 | ||
8e274523 | 1216 | int manager_setup_cgroup(Manager *m) { |
9444b1f2 | 1217 | _cleanup_free_ char *path = NULL; |
efdb0237 LP |
1218 | CGroupController c; |
1219 | int r, unified; | |
1220 | char *e; | |
8e274523 LP |
1221 | |
1222 | assert(m); | |
1223 | ||
35d2e7ec | 1224 | /* 1. Determine hierarchy */ |
efdb0237 | 1225 | m->cgroup_root = mfree(m->cgroup_root); |
9444b1f2 | 1226 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &m->cgroup_root); |
23bbb0de MS |
1227 | if (r < 0) |
1228 | return log_error_errno(r, "Cannot determine cgroup we are running in: %m"); | |
8e274523 | 1229 | |
efdb0237 LP |
1230 | /* Chop off the init scope, if we are already located in it */ |
1231 | e = endswith(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
0d8c31ff | 1232 | |
efdb0237 LP |
1233 | /* LEGACY: Also chop off the system slice if we are in |
1234 | * it. This is to support live upgrades from older systemd | |
1235 | * versions where PID 1 was moved there. Also see | |
1236 | * cg_get_root_path(). */ | |
1237 | if (!e && m->running_as == MANAGER_SYSTEM) { | |
9444b1f2 | 1238 | e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE); |
15c60e99 | 1239 | if (!e) |
efdb0237 | 1240 | e = endswith(m->cgroup_root, "/system"); /* even more legacy */ |
0baf24dd | 1241 | } |
efdb0237 LP |
1242 | if (e) |
1243 | *e = 0; | |
7ccfb64a | 1244 | |
9444b1f2 LP |
1245 | /* And make sure to store away the root value without trailing |
1246 | * slash, even for the root dir, so that we can easily prepend | |
1247 | * it everywhere. */ | |
efdb0237 LP |
1248 | while ((e = endswith(m->cgroup_root, "/"))) |
1249 | *e = 0; | |
8e274523 | 1250 | |
35d2e7ec | 1251 | /* 2. Show data */ |
9444b1f2 | 1252 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, NULL, &path); |
23bbb0de MS |
1253 | if (r < 0) |
1254 | return log_error_errno(r, "Cannot find cgroup mount point: %m"); | |
8e274523 | 1255 | |
efdb0237 LP |
1256 | unified = cg_unified(); |
1257 | if (unified < 0) | |
1258 | return log_error_errno(r, "Couldn't determine if we are running in the unified hierarchy: %m"); | |
1259 | if (unified > 0) | |
1260 | log_debug("Unified cgroup hierarchy is located at %s.", path); | |
1261 | else | |
1262 | log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path); | |
1263 | ||
0d8c31ff | 1264 | if (!m->test_run) { |
efdb0237 | 1265 | const char *scope_path; |
c6c18be3 | 1266 | |
0d8c31ff | 1267 | /* 3. Install agent */ |
efdb0237 LP |
1268 | if (unified) { |
1269 | ||
1270 | /* In the unified hierarchy we can can get | |
1271 | * cgroup empty notifications via inotify. */ | |
1272 | ||
1273 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1274 | safe_close(m->cgroup_inotify_fd); | |
1275 | ||
1276 | m->cgroup_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
1277 | if (m->cgroup_inotify_fd < 0) | |
1278 | return log_error_errno(errno, "Failed to create control group inotify object: %m"); | |
1279 | ||
1280 | r = sd_event_add_io(m->event, &m->cgroup_inotify_event_source, m->cgroup_inotify_fd, EPOLLIN, on_cgroup_inotify_event, m); | |
1281 | if (r < 0) | |
1282 | return log_error_errno(r, "Failed to watch control group inotify object: %m"); | |
1283 | ||
1284 | r = sd_event_source_set_priority(m->cgroup_inotify_event_source, SD_EVENT_PRIORITY_IDLE - 5); | |
1285 | if (r < 0) | |
1286 | return log_error_errno(r, "Failed to set priority of inotify event source: %m"); | |
1287 | ||
1288 | (void) sd_event_source_set_description(m->cgroup_inotify_event_source, "cgroup-inotify"); | |
1289 | ||
1290 | } else if (m->running_as == MANAGER_SYSTEM) { | |
1291 | ||
1292 | /* On the legacy hierarchy we only get | |
1293 | * notifications via cgroup agents. (Which | |
1294 | * isn't really reliable, since it does not | |
1295 | * generate events when control groups with | |
1296 | * children run empty. */ | |
1297 | ||
0d8c31ff ZJS |
1298 | r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH); |
1299 | if (r < 0) | |
da927ba9 | 1300 | log_warning_errno(r, "Failed to install release agent, ignoring: %m"); |
0d8c31ff ZJS |
1301 | else if (r > 0) |
1302 | log_debug("Installed release agent."); | |
efdb0237 | 1303 | else if (r == 0) |
0d8c31ff ZJS |
1304 | log_debug("Release agent already installed."); |
1305 | } | |
8e274523 | 1306 | |
efdb0237 LP |
1307 | /* 4. Make sure we are in the special "init.scope" unit in the root slice. */ |
1308 | scope_path = strjoina(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
1309 | r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); | |
23bbb0de | 1310 | if (r < 0) |
efdb0237 LP |
1311 | return log_error_errno(r, "Failed to create %s control group: %m", scope_path); |
1312 | ||
1313 | /* also, move all other userspace processes remaining | |
1314 | * in the root cgroup into that scope. */ | |
1315 | r = cg_migrate(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, SYSTEMD_CGROUP_CONTROLLER, scope_path, false); | |
1316 | if (r < 0) | |
1317 | log_warning_errno(r, "Couldn't move remaining userspace processes, ignoring: %m"); | |
c6c18be3 | 1318 | |
0d8c31ff ZJS |
1319 | /* 5. And pin it, so that it cannot be unmounted */ |
1320 | safe_close(m->pin_cgroupfs_fd); | |
0d8c31ff | 1321 | m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK); |
4a62c710 MS |
1322 | if (m->pin_cgroupfs_fd < 0) |
1323 | return log_error_errno(errno, "Failed to open pin file: %m"); | |
0d8c31ff | 1324 | |
cc98b302 | 1325 | /* 6. Always enable hierarchical support if it exists... */ |
efdb0237 LP |
1326 | if (!unified) |
1327 | (void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1"); | |
c6c18be3 LP |
1328 | } |
1329 | ||
0d8c31ff | 1330 | /* 7. Figure out which controllers are supported */ |
efdb0237 LP |
1331 | r = cg_mask_supported(&m->cgroup_supported); |
1332 | if (r < 0) | |
1333 | return log_error_errno(r, "Failed to determine supported controllers: %m"); | |
1334 | ||
1335 | for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) | |
1336 | log_debug("Controller '%s' supported: %s", cgroup_controller_to_string(c), yes_no(m->cgroup_supported & c)); | |
9156e799 | 1337 | |
a32360f1 | 1338 | return 0; |
8e274523 LP |
1339 | } |
1340 | ||
c6c18be3 | 1341 | void manager_shutdown_cgroup(Manager *m, bool delete) { |
8e274523 LP |
1342 | assert(m); |
1343 | ||
9444b1f2 LP |
1344 | /* We can't really delete the group, since we are in it. But |
1345 | * let's trim it. */ | |
1346 | if (delete && m->cgroup_root) | |
efdb0237 LP |
1347 | (void) cg_trim(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, false); |
1348 | ||
1349 | m->cgroup_inotify_wd_unit = hashmap_free(m->cgroup_inotify_wd_unit); | |
1350 | ||
1351 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1352 | m->cgroup_inotify_fd = safe_close(m->cgroup_inotify_fd); | |
8e274523 | 1353 | |
03e334a1 | 1354 | m->pin_cgroupfs_fd = safe_close(m->pin_cgroupfs_fd); |
c6c18be3 | 1355 | |
efdb0237 | 1356 | m->cgroup_root = mfree(m->cgroup_root); |
8e274523 LP |
1357 | } |
1358 | ||
4ad49000 | 1359 | Unit* manager_get_unit_by_cgroup(Manager *m, const char *cgroup) { |
acb14d31 | 1360 | char *p; |
4ad49000 | 1361 | Unit *u; |
acb14d31 LP |
1362 | |
1363 | assert(m); | |
1364 | assert(cgroup); | |
acb14d31 | 1365 | |
4ad49000 LP |
1366 | u = hashmap_get(m->cgroup_unit, cgroup); |
1367 | if (u) | |
1368 | return u; | |
acb14d31 | 1369 | |
8e70580b | 1370 | p = strdupa(cgroup); |
acb14d31 LP |
1371 | for (;;) { |
1372 | char *e; | |
1373 | ||
1374 | e = strrchr(p, '/'); | |
efdb0237 LP |
1375 | if (!e || e == p) |
1376 | return hashmap_get(m->cgroup_unit, SPECIAL_ROOT_SLICE); | |
acb14d31 LP |
1377 | |
1378 | *e = 0; | |
1379 | ||
4ad49000 LP |
1380 | u = hashmap_get(m->cgroup_unit, p); |
1381 | if (u) | |
1382 | return u; | |
acb14d31 LP |
1383 | } |
1384 | } | |
1385 | ||
b3ac818b | 1386 | Unit *manager_get_unit_by_pid_cgroup(Manager *m, pid_t pid) { |
4ad49000 | 1387 | _cleanup_free_ char *cgroup = NULL; |
acb14d31 | 1388 | int r; |
8e274523 | 1389 | |
8c47c732 LP |
1390 | assert(m); |
1391 | ||
b3ac818b LP |
1392 | if (pid <= 0) |
1393 | return NULL; | |
1394 | ||
1395 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &cgroup); | |
1396 | if (r < 0) | |
1397 | return NULL; | |
1398 | ||
1399 | return manager_get_unit_by_cgroup(m, cgroup); | |
1400 | } | |
1401 | ||
1402 | Unit *manager_get_unit_by_pid(Manager *m, pid_t pid) { | |
1403 | Unit *u; | |
1404 | ||
1405 | assert(m); | |
1406 | ||
efdb0237 | 1407 | if (pid <= 0) |
8c47c732 LP |
1408 | return NULL; |
1409 | ||
efdb0237 LP |
1410 | if (pid == 1) |
1411 | return hashmap_get(m->units, SPECIAL_INIT_SCOPE); | |
1412 | ||
fea72cc0 | 1413 | u = hashmap_get(m->watch_pids1, PID_TO_PTR(pid)); |
5fe8876b LP |
1414 | if (u) |
1415 | return u; | |
1416 | ||
fea72cc0 | 1417 | u = hashmap_get(m->watch_pids2, PID_TO_PTR(pid)); |
5fe8876b LP |
1418 | if (u) |
1419 | return u; | |
1420 | ||
b3ac818b | 1421 | return manager_get_unit_by_pid_cgroup(m, pid); |
6dde1f33 | 1422 | } |
4fbf50b3 | 1423 | |
4ad49000 LP |
1424 | int manager_notify_cgroup_empty(Manager *m, const char *cgroup) { |
1425 | Unit *u; | |
4fbf50b3 | 1426 | |
4ad49000 LP |
1427 | assert(m); |
1428 | assert(cgroup); | |
4fbf50b3 | 1429 | |
4ad49000 | 1430 | u = manager_get_unit_by_cgroup(m, cgroup); |
5ad096b3 LP |
1431 | if (!u) |
1432 | return 0; | |
b56c28c3 | 1433 | |
efdb0237 | 1434 | return unit_notify_cgroup_empty(u); |
5ad096b3 LP |
1435 | } |
1436 | ||
1437 | int unit_get_memory_current(Unit *u, uint64_t *ret) { | |
1438 | _cleanup_free_ char *v = NULL; | |
1439 | int r; | |
1440 | ||
1441 | assert(u); | |
1442 | assert(ret); | |
1443 | ||
1444 | if (!u->cgroup_path) | |
1445 | return -ENODATA; | |
1446 | ||
efdb0237 | 1447 | if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0) |
5ad096b3 LP |
1448 | return -ENODATA; |
1449 | ||
efdb0237 LP |
1450 | if (cg_unified() <= 0) |
1451 | r = cg_get_attribute("memory", u->cgroup_path, "memory.usage_in_bytes", &v); | |
1452 | else | |
1453 | r = cg_get_attribute("memory", u->cgroup_path, "memory.current", &v); | |
5ad096b3 LP |
1454 | if (r == -ENOENT) |
1455 | return -ENODATA; | |
1456 | if (r < 0) | |
1457 | return r; | |
1458 | ||
1459 | return safe_atou64(v, ret); | |
1460 | } | |
1461 | ||
1462 | static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) { | |
1463 | _cleanup_free_ char *v = NULL; | |
1464 | uint64_t ns; | |
1465 | int r; | |
1466 | ||
1467 | assert(u); | |
1468 | assert(ret); | |
1469 | ||
1470 | if (!u->cgroup_path) | |
1471 | return -ENODATA; | |
1472 | ||
efdb0237 | 1473 | if ((u->cgroup_realized_mask & CGROUP_MASK_CPUACCT) == 0) |
5ad096b3 LP |
1474 | return -ENODATA; |
1475 | ||
1476 | r = cg_get_attribute("cpuacct", u->cgroup_path, "cpuacct.usage", &v); | |
1477 | if (r == -ENOENT) | |
1478 | return -ENODATA; | |
1479 | if (r < 0) | |
1480 | return r; | |
1481 | ||
1482 | r = safe_atou64(v, &ns); | |
1483 | if (r < 0) | |
1484 | return r; | |
1485 | ||
1486 | *ret = ns; | |
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | int unit_get_cpu_usage(Unit *u, nsec_t *ret) { | |
1491 | nsec_t ns; | |
1492 | int r; | |
1493 | ||
1494 | r = unit_get_cpu_usage_raw(u, &ns); | |
1495 | if (r < 0) | |
1496 | return r; | |
1497 | ||
1498 | if (ns > u->cpuacct_usage_base) | |
1499 | ns -= u->cpuacct_usage_base; | |
1500 | else | |
1501 | ns = 0; | |
1502 | ||
1503 | *ret = ns; | |
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | int unit_reset_cpu_usage(Unit *u) { | |
1508 | nsec_t ns; | |
1509 | int r; | |
1510 | ||
1511 | assert(u); | |
1512 | ||
1513 | r = unit_get_cpu_usage_raw(u, &ns); | |
1514 | if (r < 0) { | |
1515 | u->cpuacct_usage_base = 0; | |
1516 | return r; | |
b56c28c3 | 1517 | } |
2633eb83 | 1518 | |
5ad096b3 | 1519 | u->cpuacct_usage_base = ns; |
4ad49000 | 1520 | return 0; |
4fbf50b3 LP |
1521 | } |
1522 | ||
e9db43d5 LP |
1523 | bool unit_cgroup_delegate(Unit *u) { |
1524 | CGroupContext *c; | |
1525 | ||
1526 | assert(u); | |
1527 | ||
1528 | c = unit_get_cgroup_context(u); | |
1529 | if (!c) | |
1530 | return false; | |
1531 | ||
1532 | return c->delegate; | |
1533 | } | |
1534 | ||
4ad49000 LP |
1535 | static const char* const cgroup_device_policy_table[_CGROUP_DEVICE_POLICY_MAX] = { |
1536 | [CGROUP_AUTO] = "auto", | |
1537 | [CGROUP_CLOSED] = "closed", | |
1538 | [CGROUP_STRICT] = "strict", | |
1539 | }; | |
4fbf50b3 | 1540 | |
4ad49000 | 1541 | DEFINE_STRING_TABLE_LOOKUP(cgroup_device_policy, CGroupDevicePolicy); |