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Commit | Line | Data |
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663996b3 MS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
14228c0d | 4 | Copyright 2013 Lennart Poettering |
663996b3 MS |
5 | |
6 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
663996b3 | 20 | #include <fcntl.h> |
60f067b4 | 21 | #include <fnmatch.h> |
663996b3 | 22 | |
db2df898 | 23 | #include "alloc-util.h" |
6300502b | 24 | #include "cgroup-util.h" |
db2df898 MP |
25 | #include "cgroup.h" |
26 | #include "fd-util.h" | |
27 | #include "fileio.h" | |
28 | #include "fs-util.h" | |
29 | #include "parse-util.h" | |
663996b3 | 30 | #include "path-util.h" |
6300502b | 31 | #include "process-util.h" |
14228c0d | 32 | #include "special.h" |
db2df898 MP |
33 | #include "string-table.h" |
34 | #include "string-util.h" | |
663996b3 | 35 | |
60f067b4 JS |
36 | #define CGROUP_CPU_QUOTA_PERIOD_USEC ((usec_t) 100 * USEC_PER_MSEC) |
37 | ||
14228c0d MB |
38 | void cgroup_context_init(CGroupContext *c) { |
39 | assert(c); | |
663996b3 | 40 | |
14228c0d MB |
41 | /* Initialize everything to the kernel defaults, assuming the |
42 | * structure is preinitialized to 0 */ | |
663996b3 | 43 | |
6300502b MP |
44 | c->cpu_shares = CGROUP_CPU_SHARES_INVALID; |
45 | c->startup_cpu_shares = CGROUP_CPU_SHARES_INVALID; | |
46 | c->cpu_quota_per_sec_usec = USEC_INFINITY; | |
47 | ||
14228c0d | 48 | c->memory_limit = (uint64_t) -1; |
60f067b4 | 49 | |
6300502b MP |
50 | c->blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID; |
51 | c->startup_blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID; | |
52 | ||
53 | c->tasks_max = (uint64_t) -1; | |
14228c0d | 54 | } |
663996b3 | 55 | |
14228c0d MB |
56 | void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a) { |
57 | assert(c); | |
58 | assert(a); | |
663996b3 | 59 | |
60f067b4 | 60 | LIST_REMOVE(device_allow, c->device_allow, a); |
14228c0d MB |
61 | free(a->path); |
62 | free(a); | |
663996b3 MS |
63 | } |
64 | ||
14228c0d MB |
65 | void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w) { |
66 | assert(c); | |
67 | assert(w); | |
663996b3 | 68 | |
60f067b4 | 69 | LIST_REMOVE(device_weights, c->blockio_device_weights, w); |
14228c0d MB |
70 | free(w->path); |
71 | free(w); | |
663996b3 MS |
72 | } |
73 | ||
14228c0d MB |
74 | void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b) { |
75 | assert(c); | |
663996b3 MS |
76 | assert(b); |
77 | ||
60f067b4 | 78 | LIST_REMOVE(device_bandwidths, c->blockio_device_bandwidths, b); |
14228c0d MB |
79 | free(b->path); |
80 | free(b); | |
81 | } | |
663996b3 | 82 | |
14228c0d MB |
83 | void cgroup_context_done(CGroupContext *c) { |
84 | assert(c); | |
663996b3 | 85 | |
14228c0d MB |
86 | while (c->blockio_device_weights) |
87 | cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights); | |
663996b3 | 88 | |
14228c0d MB |
89 | while (c->blockio_device_bandwidths) |
90 | cgroup_context_free_blockio_device_bandwidth(c, c->blockio_device_bandwidths); | |
663996b3 | 91 | |
14228c0d MB |
92 | while (c->device_allow) |
93 | cgroup_context_free_device_allow(c, c->device_allow); | |
94 | } | |
663996b3 | 95 | |
14228c0d MB |
96 | void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) { |
97 | CGroupBlockIODeviceBandwidth *b; | |
98 | CGroupBlockIODeviceWeight *w; | |
99 | CGroupDeviceAllow *a; | |
60f067b4 | 100 | char u[FORMAT_TIMESPAN_MAX]; |
14228c0d MB |
101 | |
102 | assert(c); | |
103 | assert(f); | |
104 | ||
105 | prefix = strempty(prefix); | |
106 | ||
107 | fprintf(f, | |
108 | "%sCPUAccounting=%s\n" | |
109 | "%sBlockIOAccounting=%s\n" | |
110 | "%sMemoryAccounting=%s\n" | |
6300502b MP |
111 | "%sTasksAccounting=%s\n" |
112 | "%sCPUShares=%" PRIu64 "\n" | |
113 | "%sStartupCPUShares=%" PRIu64 "\n" | |
60f067b4 | 114 | "%sCPUQuotaPerSecSec=%s\n" |
6300502b MP |
115 | "%sBlockIOWeight=%" PRIu64 "\n" |
116 | "%sStartupBlockIOWeight=%" PRIu64 "\n" | |
14228c0d | 117 | "%sMemoryLimit=%" PRIu64 "\n" |
6300502b | 118 | "%sTasksMax=%" PRIu64 "\n" |
f47781d8 MP |
119 | "%sDevicePolicy=%s\n" |
120 | "%sDelegate=%s\n", | |
14228c0d MB |
121 | prefix, yes_no(c->cpu_accounting), |
122 | prefix, yes_no(c->blockio_accounting), | |
123 | prefix, yes_no(c->memory_accounting), | |
6300502b | 124 | prefix, yes_no(c->tasks_accounting), |
14228c0d | 125 | prefix, c->cpu_shares, |
60f067b4 | 126 | prefix, c->startup_cpu_shares, |
5eef597e | 127 | prefix, format_timespan(u, sizeof(u), c->cpu_quota_per_sec_usec, 1), |
14228c0d | 128 | prefix, c->blockio_weight, |
60f067b4 | 129 | prefix, c->startup_blockio_weight, |
14228c0d | 130 | prefix, c->memory_limit, |
6300502b | 131 | prefix, c->tasks_max, |
f47781d8 MP |
132 | prefix, cgroup_device_policy_to_string(c->device_policy), |
133 | prefix, yes_no(c->delegate)); | |
14228c0d MB |
134 | |
135 | LIST_FOREACH(device_allow, a, c->device_allow) | |
136 | fprintf(f, | |
137 | "%sDeviceAllow=%s %s%s%s\n", | |
138 | prefix, | |
139 | a->path, | |
140 | a->r ? "r" : "", a->w ? "w" : "", a->m ? "m" : ""); | |
141 | ||
142 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) | |
143 | fprintf(f, | |
6300502b | 144 | "%sBlockIODeviceWeight=%s %" PRIu64, |
14228c0d MB |
145 | prefix, |
146 | w->path, | |
147 | w->weight); | |
148 | ||
149 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
150 | char buf[FORMAT_BYTES_MAX]; | |
151 | ||
152 | fprintf(f, | |
153 | "%s%s=%s %s\n", | |
154 | prefix, | |
155 | b->read ? "BlockIOReadBandwidth" : "BlockIOWriteBandwidth", | |
156 | b->path, | |
157 | format_bytes(buf, sizeof(buf), b->bandwidth)); | |
158 | } | |
663996b3 MS |
159 | } |
160 | ||
14228c0d MB |
161 | static int lookup_blkio_device(const char *p, dev_t *dev) { |
162 | struct stat st; | |
163 | int r; | |
663996b3 | 164 | |
14228c0d MB |
165 | assert(p); |
166 | assert(dev); | |
663996b3 | 167 | |
14228c0d | 168 | r = stat(p, &st); |
f47781d8 MP |
169 | if (r < 0) |
170 | return log_warning_errno(errno, "Couldn't stat device %s: %m", p); | |
663996b3 | 171 | |
14228c0d MB |
172 | if (S_ISBLK(st.st_mode)) |
173 | *dev = st.st_rdev; | |
174 | else if (major(st.st_dev) != 0) { | |
175 | /* If this is not a device node then find the block | |
176 | * device this file is stored on */ | |
177 | *dev = st.st_dev; | |
663996b3 | 178 | |
14228c0d MB |
179 | /* If this is a partition, try to get the originating |
180 | * block device */ | |
181 | block_get_whole_disk(*dev, dev); | |
182 | } else { | |
183 | log_warning("%s is not a block device and file system block device cannot be determined or is not local.", p); | |
184 | return -ENODEV; | |
185 | } | |
663996b3 | 186 | |
14228c0d | 187 | return 0; |
663996b3 MS |
188 | } |
189 | ||
14228c0d MB |
190 | static int whitelist_device(const char *path, const char *node, const char *acc) { |
191 | char buf[2+DECIMAL_STR_MAX(dev_t)*2+2+4]; | |
192 | struct stat st; | |
663996b3 MS |
193 | int r; |
194 | ||
14228c0d MB |
195 | assert(path); |
196 | assert(acc); | |
663996b3 | 197 | |
14228c0d MB |
198 | if (stat(node, &st) < 0) { |
199 | log_warning("Couldn't stat device %s", node); | |
200 | return -errno; | |
201 | } | |
663996b3 | 202 | |
14228c0d MB |
203 | if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { |
204 | log_warning("%s is not a device.", node); | |
205 | return -ENODEV; | |
206 | } | |
207 | ||
208 | sprintf(buf, | |
209 | "%c %u:%u %s", | |
210 | S_ISCHR(st.st_mode) ? 'c' : 'b', | |
211 | major(st.st_rdev), minor(st.st_rdev), | |
212 | acc); | |
663996b3 | 213 | |
14228c0d | 214 | r = cg_set_attribute("devices", path, "devices.allow", buf); |
663996b3 | 215 | if (r < 0) |
db2df898 | 216 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 217 | "Failed to set devices.allow on %s: %m", path); |
663996b3 | 218 | |
14228c0d | 219 | return r; |
663996b3 MS |
220 | } |
221 | ||
60f067b4 JS |
222 | static int whitelist_major(const char *path, const char *name, char type, const char *acc) { |
223 | _cleanup_fclose_ FILE *f = NULL; | |
224 | char line[LINE_MAX]; | |
225 | bool good = false; | |
226 | int r; | |
227 | ||
228 | assert(path); | |
229 | assert(acc); | |
230 | assert(type == 'b' || type == 'c'); | |
231 | ||
232 | f = fopen("/proc/devices", "re"); | |
f47781d8 MP |
233 | if (!f) |
234 | return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s (%c): %m", name, type); | |
60f067b4 JS |
235 | |
236 | FOREACH_LINE(line, f, goto fail) { | |
237 | char buf[2+DECIMAL_STR_MAX(unsigned)+3+4], *p, *w; | |
238 | unsigned maj; | |
239 | ||
240 | truncate_nl(line); | |
241 | ||
242 | if (type == 'c' && streq(line, "Character devices:")) { | |
243 | good = true; | |
244 | continue; | |
245 | } | |
246 | ||
247 | if (type == 'b' && streq(line, "Block devices:")) { | |
248 | good = true; | |
249 | continue; | |
250 | } | |
251 | ||
252 | if (isempty(line)) { | |
253 | good = false; | |
254 | continue; | |
255 | } | |
256 | ||
257 | if (!good) | |
258 | continue; | |
259 | ||
260 | p = strstrip(line); | |
261 | ||
262 | w = strpbrk(p, WHITESPACE); | |
263 | if (!w) | |
264 | continue; | |
265 | *w = 0; | |
266 | ||
267 | r = safe_atou(p, &maj); | |
268 | if (r < 0) | |
269 | continue; | |
270 | if (maj <= 0) | |
271 | continue; | |
272 | ||
273 | w++; | |
274 | w += strspn(w, WHITESPACE); | |
275 | ||
276 | if (fnmatch(name, w, 0) != 0) | |
277 | continue; | |
278 | ||
279 | sprintf(buf, | |
280 | "%c %u:* %s", | |
281 | type, | |
282 | maj, | |
283 | acc); | |
284 | ||
285 | r = cg_set_attribute("devices", path, "devices.allow", buf); | |
286 | if (r < 0) | |
db2df898 | 287 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 288 | "Failed to set devices.allow on %s: %m", path); |
60f067b4 JS |
289 | } |
290 | ||
291 | return 0; | |
292 | ||
293 | fail: | |
f47781d8 | 294 | log_warning_errno(errno, "Failed to read /proc/devices: %m"); |
60f067b4 JS |
295 | return -errno; |
296 | } | |
297 | ||
4c89c718 | 298 | void cgroup_context_apply(CGroupContext *c, CGroupMask mask, const char *path, ManagerState state) { |
60f067b4 | 299 | bool is_root; |
663996b3 MS |
300 | int r; |
301 | ||
14228c0d MB |
302 | assert(c); |
303 | assert(path); | |
304 | ||
305 | if (mask == 0) | |
306 | return; | |
307 | ||
e735f4d4 | 308 | /* Some cgroup attributes are not supported on the root cgroup, |
60f067b4 JS |
309 | * hence silently ignore */ |
310 | is_root = isempty(path) || path_equal(path, "/"); | |
e735f4d4 MP |
311 | if (is_root) |
312 | /* Make sure we don't try to display messages with an empty path. */ | |
313 | path = "/"; | |
314 | ||
315 | /* We generally ignore errors caused by read-only mounted | |
316 | * cgroup trees (assuming we are running in a container then), | |
317 | * and missing cgroups, i.e. EROFS and ENOENT. */ | |
60f067b4 | 318 | |
d9dfd233 | 319 | if ((mask & CGROUP_MASK_CPU) && !is_root) { |
6300502b | 320 | char buf[MAX(DECIMAL_STR_MAX(uint64_t), DECIMAL_STR_MAX(usec_t)) + 1]; |
14228c0d | 321 | |
6300502b MP |
322 | sprintf(buf, "%" PRIu64 "\n", |
323 | IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID ? c->startup_cpu_shares : | |
324 | c->cpu_shares != CGROUP_CPU_SHARES_INVALID ? c->cpu_shares : CGROUP_CPU_SHARES_DEFAULT); | |
14228c0d MB |
325 | r = cg_set_attribute("cpu", path, "cpu.shares", buf); |
326 | if (r < 0) | |
db2df898 | 327 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 328 | "Failed to set cpu.shares on %s: %m", path); |
60f067b4 JS |
329 | |
330 | sprintf(buf, USEC_FMT "\n", CGROUP_CPU_QUOTA_PERIOD_USEC); | |
331 | r = cg_set_attribute("cpu", path, "cpu.cfs_period_us", buf); | |
332 | if (r < 0) | |
db2df898 | 333 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 334 | "Failed to set cpu.cfs_period_us on %s: %m", path); |
60f067b4 | 335 | |
5eef597e | 336 | if (c->cpu_quota_per_sec_usec != USEC_INFINITY) { |
60f067b4 JS |
337 | sprintf(buf, USEC_FMT "\n", c->cpu_quota_per_sec_usec * CGROUP_CPU_QUOTA_PERIOD_USEC / USEC_PER_SEC); |
338 | r = cg_set_attribute("cpu", path, "cpu.cfs_quota_us", buf); | |
339 | } else | |
340 | r = cg_set_attribute("cpu", path, "cpu.cfs_quota_us", "-1"); | |
341 | if (r < 0) | |
db2df898 | 342 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 343 | "Failed to set cpu.cfs_quota_us on %s: %m", path); |
663996b3 MS |
344 | } |
345 | ||
d9dfd233 | 346 | if (mask & CGROUP_MASK_BLKIO) { |
6300502b MP |
347 | char buf[MAX(DECIMAL_STR_MAX(uint64_t)+1, |
348 | DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1)]; | |
14228c0d MB |
349 | CGroupBlockIODeviceWeight *w; |
350 | CGroupBlockIODeviceBandwidth *b; | |
663996b3 | 351 | |
60f067b4 | 352 | if (!is_root) { |
6300502b MP |
353 | sprintf(buf, "%" PRIu64 "\n", |
354 | IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID ? c->startup_blockio_weight : | |
355 | c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID ? c->blockio_weight : CGROUP_BLKIO_WEIGHT_DEFAULT); | |
60f067b4 JS |
356 | r = cg_set_attribute("blkio", path, "blkio.weight", buf); |
357 | if (r < 0) | |
db2df898 | 358 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 359 | "Failed to set blkio.weight on %s: %m", path); |
663996b3 | 360 | |
60f067b4 JS |
361 | /* FIXME: no way to reset this list */ |
362 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) { | |
363 | dev_t dev; | |
663996b3 | 364 | |
60f067b4 JS |
365 | r = lookup_blkio_device(w->path, &dev); |
366 | if (r < 0) | |
367 | continue; | |
663996b3 | 368 | |
6300502b | 369 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), w->weight); |
60f067b4 JS |
370 | r = cg_set_attribute("blkio", path, "blkio.weight_device", buf); |
371 | if (r < 0) | |
db2df898 | 372 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 373 | "Failed to set blkio.weight_device on %s: %m", path); |
60f067b4 | 374 | } |
14228c0d MB |
375 | } |
376 | ||
377 | /* FIXME: no way to reset this list */ | |
378 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
379 | const char *a; | |
380 | dev_t dev; | |
381 | ||
382 | r = lookup_blkio_device(b->path, &dev); | |
383 | if (r < 0) | |
384 | continue; | |
385 | ||
386 | a = b->read ? "blkio.throttle.read_bps_device" : "blkio.throttle.write_bps_device"; | |
387 | ||
388 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), b->bandwidth); | |
389 | r = cg_set_attribute("blkio", path, a, buf); | |
390 | if (r < 0) | |
db2df898 | 391 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 392 | "Failed to set %s on %s: %m", a, path); |
14228c0d MB |
393 | } |
394 | } | |
395 | ||
d9dfd233 | 396 | if ((mask & CGROUP_MASK_MEMORY) && !is_root) { |
14228c0d MB |
397 | if (c->memory_limit != (uint64_t) -1) { |
398 | char buf[DECIMAL_STR_MAX(uint64_t) + 1]; | |
399 | ||
400 | sprintf(buf, "%" PRIu64 "\n", c->memory_limit); | |
d9dfd233 MP |
401 | |
402 | if (cg_unified() <= 0) | |
403 | r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf); | |
404 | else | |
405 | r = cg_set_attribute("memory", path, "memory.max", buf); | |
406 | ||
407 | } else { | |
408 | if (cg_unified() <= 0) | |
409 | r = cg_set_attribute("memory", path, "memory.limit_in_bytes", "-1"); | |
410 | else | |
411 | r = cg_set_attribute("memory", path, "memory.max", "max"); | |
412 | } | |
663996b3 | 413 | |
14228c0d | 414 | if (r < 0) |
db2df898 | 415 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
d9dfd233 | 416 | "Failed to set memory.limit_in_bytes/memory.max on %s: %m", path); |
663996b3 MS |
417 | } |
418 | ||
6300502b | 419 | if ((mask & CGROUP_MASK_DEVICES) && !is_root) { |
14228c0d MB |
420 | CGroupDeviceAllow *a; |
421 | ||
e735f4d4 MP |
422 | /* Changing the devices list of a populated cgroup |
423 | * might result in EINVAL, hence ignore EINVAL | |
424 | * here. */ | |
425 | ||
14228c0d MB |
426 | if (c->device_allow || c->device_policy != CGROUP_AUTO) |
427 | r = cg_set_attribute("devices", path, "devices.deny", "a"); | |
428 | else | |
429 | r = cg_set_attribute("devices", path, "devices.allow", "a"); | |
430 | if (r < 0) | |
db2df898 | 431 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
e735f4d4 | 432 | "Failed to reset devices.list on %s: %m", path); |
14228c0d MB |
433 | |
434 | if (c->device_policy == CGROUP_CLOSED || | |
435 | (c->device_policy == CGROUP_AUTO && c->device_allow)) { | |
436 | static const char auto_devices[] = | |
60f067b4 JS |
437 | "/dev/null\0" "rwm\0" |
438 | "/dev/zero\0" "rwm\0" | |
439 | "/dev/full\0" "rwm\0" | |
440 | "/dev/random\0" "rwm\0" | |
441 | "/dev/urandom\0" "rwm\0" | |
442 | "/dev/tty\0" "rwm\0" | |
443 | "/dev/pts/ptmx\0" "rw\0"; /* /dev/pts/ptmx may not be duplicated, but accessed */ | |
14228c0d MB |
444 | |
445 | const char *x, *y; | |
446 | ||
447 | NULSTR_FOREACH_PAIR(x, y, auto_devices) | |
448 | whitelist_device(path, x, y); | |
60f067b4 JS |
449 | |
450 | whitelist_major(path, "pts", 'c', "rw"); | |
451 | whitelist_major(path, "kdbus", 'c', "rw"); | |
452 | whitelist_major(path, "kdbus/*", 'c', "rw"); | |
14228c0d MB |
453 | } |
454 | ||
455 | LIST_FOREACH(device_allow, a, c->device_allow) { | |
456 | char acc[4]; | |
457 | unsigned k = 0; | |
458 | ||
459 | if (a->r) | |
460 | acc[k++] = 'r'; | |
461 | if (a->w) | |
462 | acc[k++] = 'w'; | |
463 | if (a->m) | |
464 | acc[k++] = 'm'; | |
465 | ||
466 | if (k == 0) | |
467 | continue; | |
468 | ||
469 | acc[k++] = 0; | |
60f067b4 JS |
470 | |
471 | if (startswith(a->path, "/dev/")) | |
472 | whitelist_device(path, a->path, acc); | |
473 | else if (startswith(a->path, "block-")) | |
474 | whitelist_major(path, a->path + 6, 'b', acc); | |
475 | else if (startswith(a->path, "char-")) | |
476 | whitelist_major(path, a->path + 5, 'c', acc); | |
477 | else | |
478 | log_debug("Ignoring device %s while writing cgroup attribute.", a->path); | |
14228c0d MB |
479 | } |
480 | } | |
6300502b MP |
481 | |
482 | if ((mask & CGROUP_MASK_PIDS) && !is_root) { | |
483 | ||
484 | if (c->tasks_max != (uint64_t) -1) { | |
485 | char buf[DECIMAL_STR_MAX(uint64_t) + 2]; | |
486 | ||
487 | sprintf(buf, "%" PRIu64 "\n", c->tasks_max); | |
488 | r = cg_set_attribute("pids", path, "pids.max", buf); | |
489 | } else | |
490 | r = cg_set_attribute("pids", path, "pids.max", "max"); | |
491 | ||
492 | if (r < 0) | |
db2df898 | 493 | log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, |
6300502b MP |
494 | "Failed to set pids.max on %s: %m", path); |
495 | } | |
663996b3 MS |
496 | } |
497 | ||
d9dfd233 MP |
498 | CGroupMask cgroup_context_get_mask(CGroupContext *c) { |
499 | CGroupMask mask = 0; | |
14228c0d MB |
500 | |
501 | /* Figure out which controllers we need */ | |
502 | ||
60f067b4 | 503 | if (c->cpu_accounting || |
6300502b MP |
504 | c->cpu_shares != CGROUP_CPU_SHARES_INVALID || |
505 | c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID || | |
5eef597e | 506 | c->cpu_quota_per_sec_usec != USEC_INFINITY) |
d9dfd233 | 507 | mask |= CGROUP_MASK_CPUACCT | CGROUP_MASK_CPU; |
14228c0d MB |
508 | |
509 | if (c->blockio_accounting || | |
6300502b MP |
510 | c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || |
511 | c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || | |
14228c0d MB |
512 | c->blockio_device_weights || |
513 | c->blockio_device_bandwidths) | |
d9dfd233 | 514 | mask |= CGROUP_MASK_BLKIO; |
14228c0d MB |
515 | |
516 | if (c->memory_accounting || | |
517 | c->memory_limit != (uint64_t) -1) | |
d9dfd233 | 518 | mask |= CGROUP_MASK_MEMORY; |
14228c0d | 519 | |
f47781d8 MP |
520 | if (c->device_allow || |
521 | c->device_policy != CGROUP_AUTO) | |
6300502b MP |
522 | mask |= CGROUP_MASK_DEVICES; |
523 | ||
524 | if (c->tasks_accounting || | |
525 | c->tasks_max != (uint64_t) -1) | |
526 | mask |= CGROUP_MASK_PIDS; | |
527 | ||
14228c0d | 528 | return mask; |
663996b3 MS |
529 | } |
530 | ||
d9dfd233 | 531 | CGroupMask unit_get_own_mask(Unit *u) { |
14228c0d | 532 | CGroupContext *c; |
663996b3 | 533 | |
d9dfd233 MP |
534 | /* Returns the mask of controllers the unit needs for itself */ |
535 | ||
14228c0d MB |
536 | c = unit_get_cgroup_context(u); |
537 | if (!c) | |
538 | return 0; | |
663996b3 | 539 | |
f47781d8 | 540 | /* If delegation is turned on, then turn on all cgroups, |
d9dfd233 MP |
541 | * unless we are on the legacy hierarchy and the process we |
542 | * fork into it is known to drop privileges, and hence | |
543 | * shouldn't get access to the controllers. | |
544 | * | |
545 | * Note that on the unified hierarchy it is safe to delegate | |
546 | * controllers to unprivileged services. */ | |
f47781d8 MP |
547 | |
548 | if (c->delegate) { | |
549 | ExecContext *e; | |
550 | ||
551 | e = unit_get_exec_context(u); | |
d9dfd233 MP |
552 | if (!e || |
553 | exec_context_maintains_privileges(e) || | |
554 | cg_unified() > 0) | |
555 | return _CGROUP_MASK_ALL; | |
f47781d8 MP |
556 | } |
557 | ||
14228c0d | 558 | return cgroup_context_get_mask(c); |
663996b3 MS |
559 | } |
560 | ||
d9dfd233 | 561 | CGroupMask unit_get_members_mask(Unit *u) { |
14228c0d MB |
562 | assert(u); |
563 | ||
d9dfd233 MP |
564 | /* Returns the mask of controllers all of the unit's children |
565 | * require, merged */ | |
566 | ||
60f067b4 JS |
567 | if (u->cgroup_members_mask_valid) |
568 | return u->cgroup_members_mask; | |
14228c0d | 569 | |
60f067b4 JS |
570 | u->cgroup_members_mask = 0; |
571 | ||
572 | if (u->type == UNIT_SLICE) { | |
573 | Unit *member; | |
574 | Iterator i; | |
575 | ||
576 | SET_FOREACH(member, u->dependencies[UNIT_BEFORE], i) { | |
577 | ||
578 | if (member == u) | |
579 | continue; | |
580 | ||
581 | if (UNIT_DEREF(member->slice) != u) | |
582 | continue; | |
14228c0d | 583 | |
60f067b4 | 584 | u->cgroup_members_mask |= |
d9dfd233 | 585 | unit_get_own_mask(member) | |
60f067b4 JS |
586 | unit_get_members_mask(member); |
587 | } | |
663996b3 MS |
588 | } |
589 | ||
60f067b4 JS |
590 | u->cgroup_members_mask_valid = true; |
591 | return u->cgroup_members_mask; | |
592 | } | |
593 | ||
d9dfd233 | 594 | CGroupMask unit_get_siblings_mask(Unit *u) { |
60f067b4 JS |
595 | assert(u); |
596 | ||
d9dfd233 MP |
597 | /* Returns the mask of controllers all of the unit's siblings |
598 | * require, i.e. the members mask of the unit's parent slice | |
599 | * if there is one. */ | |
600 | ||
60f067b4 JS |
601 | if (UNIT_ISSET(u->slice)) |
602 | return unit_get_members_mask(UNIT_DEREF(u->slice)); | |
603 | ||
d9dfd233 MP |
604 | return unit_get_own_mask(u) | unit_get_members_mask(u); |
605 | } | |
606 | ||
607 | CGroupMask unit_get_subtree_mask(Unit *u) { | |
608 | ||
609 | /* Returns the mask of this subtree, meaning of the group | |
610 | * itself and its children. */ | |
611 | ||
612 | return unit_get_own_mask(u) | unit_get_members_mask(u); | |
60f067b4 JS |
613 | } |
614 | ||
d9dfd233 MP |
615 | CGroupMask unit_get_target_mask(Unit *u) { |
616 | CGroupMask mask; | |
617 | ||
618 | /* This returns the cgroup mask of all controllers to enable | |
619 | * for a specific cgroup, i.e. everything it needs itself, | |
620 | * plus all that its children need, plus all that its siblings | |
621 | * need. This is primarily useful on the legacy cgroup | |
622 | * hierarchy, where we need to duplicate each cgroup in each | |
623 | * hierarchy that shall be enabled for it. */ | |
60f067b4 | 624 | |
d9dfd233 MP |
625 | mask = unit_get_own_mask(u) | unit_get_members_mask(u) | unit_get_siblings_mask(u); |
626 | mask &= u->manager->cgroup_supported; | |
627 | ||
628 | return mask; | |
629 | } | |
630 | ||
631 | CGroupMask unit_get_enable_mask(Unit *u) { | |
632 | CGroupMask mask; | |
633 | ||
634 | /* This returns the cgroup mask of all controllers to enable | |
635 | * for the children of a specific cgroup. This is primarily | |
636 | * useful for the unified cgroup hierarchy, where each cgroup | |
637 | * controls which controllers are enabled for its children. */ | |
638 | ||
639 | mask = unit_get_members_mask(u); | |
60f067b4 JS |
640 | mask &= u->manager->cgroup_supported; |
641 | ||
14228c0d | 642 | return mask; |
663996b3 MS |
643 | } |
644 | ||
60f067b4 JS |
645 | /* Recurse from a unit up through its containing slices, propagating |
646 | * mask bits upward. A unit is also member of itself. */ | |
647 | void unit_update_cgroup_members_masks(Unit *u) { | |
d9dfd233 | 648 | CGroupMask m; |
60f067b4 JS |
649 | bool more; |
650 | ||
14228c0d | 651 | assert(u); |
663996b3 | 652 | |
60f067b4 | 653 | /* Calculate subtree mask */ |
d9dfd233 | 654 | m = unit_get_subtree_mask(u); |
60f067b4 JS |
655 | |
656 | /* See if anything changed from the previous invocation. If | |
657 | * not, we're done. */ | |
658 | if (u->cgroup_subtree_mask_valid && m == u->cgroup_subtree_mask) | |
659 | return; | |
660 | ||
661 | more = | |
662 | u->cgroup_subtree_mask_valid && | |
663 | ((m & ~u->cgroup_subtree_mask) != 0) && | |
664 | ((~m & u->cgroup_subtree_mask) == 0); | |
665 | ||
666 | u->cgroup_subtree_mask = m; | |
667 | u->cgroup_subtree_mask_valid = true; | |
668 | ||
669 | if (UNIT_ISSET(u->slice)) { | |
670 | Unit *s = UNIT_DEREF(u->slice); | |
671 | ||
672 | if (more) | |
673 | /* There's more set now than before. We | |
674 | * propagate the new mask to the parent's mask | |
675 | * (not caring if it actually was valid or | |
676 | * not). */ | |
677 | ||
678 | s->cgroup_members_mask |= m; | |
679 | ||
680 | else | |
681 | /* There's less set now than before (or we | |
682 | * don't know), we need to recalculate | |
683 | * everything, so let's invalidate the | |
684 | * parent's members mask */ | |
685 | ||
686 | s->cgroup_members_mask_valid = false; | |
687 | ||
688 | /* And now make sure that this change also hits our | |
689 | * grandparents */ | |
690 | unit_update_cgroup_members_masks(s); | |
691 | } | |
692 | } | |
693 | ||
d9dfd233 | 694 | static const char *migrate_callback(CGroupMask mask, void *userdata) { |
60f067b4 JS |
695 | Unit *u = userdata; |
696 | ||
697 | assert(mask != 0); | |
698 | assert(u); | |
699 | ||
700 | while (u) { | |
701 | if (u->cgroup_path && | |
702 | u->cgroup_realized && | |
703 | (u->cgroup_realized_mask & mask) == mask) | |
704 | return u->cgroup_path; | |
663996b3 | 705 | |
60f067b4 JS |
706 | u = UNIT_DEREF(u->slice); |
707 | } | |
708 | ||
709 | return NULL; | |
663996b3 MS |
710 | } |
711 | ||
d9dfd233 MP |
712 | char *unit_default_cgroup_path(Unit *u) { |
713 | _cleanup_free_ char *escaped = NULL, *slice = NULL; | |
714 | int r; | |
715 | ||
716 | assert(u); | |
717 | ||
718 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
719 | return strdup(u->manager->cgroup_root); | |
720 | ||
721 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
722 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); | |
723 | if (r < 0) | |
724 | return NULL; | |
725 | } | |
726 | ||
727 | escaped = cg_escape(u->id); | |
728 | if (!escaped) | |
729 | return NULL; | |
730 | ||
731 | if (slice) | |
732 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
733 | else | |
734 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
735 | } | |
736 | ||
737 | int unit_set_cgroup_path(Unit *u, const char *path) { | |
738 | _cleanup_free_ char *p = NULL; | |
739 | int r; | |
740 | ||
741 | assert(u); | |
742 | ||
743 | if (path) { | |
744 | p = strdup(path); | |
745 | if (!p) | |
746 | return -ENOMEM; | |
747 | } else | |
748 | p = NULL; | |
749 | ||
750 | if (streq_ptr(u->cgroup_path, p)) | |
751 | return 0; | |
752 | ||
753 | if (p) { | |
754 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
755 | if (r < 0) | |
756 | return r; | |
757 | } | |
758 | ||
759 | unit_release_cgroup(u); | |
760 | ||
761 | u->cgroup_path = p; | |
762 | p = NULL; | |
763 | ||
764 | return 1; | |
765 | } | |
766 | ||
767 | int unit_watch_cgroup(Unit *u) { | |
768 | _cleanup_free_ char *populated = NULL; | |
769 | int r; | |
770 | ||
771 | assert(u); | |
772 | ||
773 | if (!u->cgroup_path) | |
774 | return 0; | |
775 | ||
776 | if (u->cgroup_inotify_wd >= 0) | |
777 | return 0; | |
778 | ||
779 | /* Only applies to the unified hierarchy */ | |
780 | r = cg_unified(); | |
781 | if (r < 0) | |
782 | return log_unit_error_errno(u, r, "Failed detect wether the unified hierarchy is used: %m"); | |
783 | if (r == 0) | |
784 | return 0; | |
785 | ||
786 | /* Don't watch the root slice, it's pointless. */ | |
787 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
788 | return 0; | |
789 | ||
790 | r = hashmap_ensure_allocated(&u->manager->cgroup_inotify_wd_unit, &trivial_hash_ops); | |
791 | if (r < 0) | |
792 | return log_oom(); | |
793 | ||
794 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.populated", &populated); | |
795 | if (r < 0) | |
796 | return log_oom(); | |
797 | ||
798 | u->cgroup_inotify_wd = inotify_add_watch(u->manager->cgroup_inotify_fd, populated, IN_MODIFY); | |
799 | if (u->cgroup_inotify_wd < 0) { | |
800 | ||
801 | if (errno == ENOENT) /* If the directory is already | |
802 | * gone we don't need to track | |
803 | * it, so this is not an error */ | |
804 | return 0; | |
805 | ||
806 | return log_unit_error_errno(u, errno, "Failed to add inotify watch descriptor for control group %s: %m", u->cgroup_path); | |
807 | } | |
808 | ||
809 | r = hashmap_put(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd), u); | |
810 | if (r < 0) | |
811 | return log_unit_error_errno(u, r, "Failed to add inotify watch descriptor to hash map: %m"); | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static int unit_create_cgroup( | |
817 | Unit *u, | |
818 | CGroupMask target_mask, | |
819 | CGroupMask enable_mask) { | |
820 | ||
f47781d8 | 821 | CGroupContext *c; |
663996b3 | 822 | int r; |
14228c0d MB |
823 | |
824 | assert(u); | |
825 | ||
f47781d8 MP |
826 | c = unit_get_cgroup_context(u); |
827 | if (!c) | |
828 | return 0; | |
829 | ||
830 | if (!u->cgroup_path) { | |
831 | _cleanup_free_ char *path = NULL; | |
14228c0d | 832 | |
f47781d8 MP |
833 | path = unit_default_cgroup_path(u); |
834 | if (!path) | |
835 | return log_oom(); | |
836 | ||
d9dfd233 MP |
837 | r = unit_set_cgroup_path(u, path); |
838 | if (r == -EEXIST) | |
839 | return log_unit_error_errno(u, r, "Control group %s exists already.", path); | |
840 | if (r < 0) | |
841 | return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", path); | |
663996b3 MS |
842 | } |
843 | ||
60f067b4 | 844 | /* First, create our own group */ |
d9dfd233 MP |
845 | r = cg_create_everywhere(u->manager->cgroup_supported, target_mask, u->cgroup_path); |
846 | if (r < 0) | |
847 | return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", u->cgroup_path); | |
848 | ||
849 | /* Start watching it */ | |
850 | (void) unit_watch_cgroup(u); | |
851 | ||
852 | /* Enable all controllers we need */ | |
853 | r = cg_enable_everywhere(u->manager->cgroup_supported, enable_mask, u->cgroup_path); | |
f47781d8 | 854 | if (r < 0) |
d9dfd233 | 855 | log_unit_warning_errno(u, r, "Failed to enable controllers on cgroup %s, ignoring: %m", u->cgroup_path); |
14228c0d | 856 | |
60f067b4 | 857 | /* Keep track that this is now realized */ |
14228c0d | 858 | u->cgroup_realized = true; |
d9dfd233 | 859 | u->cgroup_realized_mask = target_mask; |
60f067b4 | 860 | |
f47781d8 MP |
861 | if (u->type != UNIT_SLICE && !c->delegate) { |
862 | ||
863 | /* Then, possibly move things over, but not if | |
864 | * subgroups may contain processes, which is the case | |
865 | * for slice and delegation units. */ | |
866 | r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->cgroup_path, migrate_callback, u); | |
867 | if (r < 0) | |
d9dfd233 | 868 | log_unit_warning_errno(u, r, "Failed to migrate cgroup from to %s, ignoring: %m", u->cgroup_path); |
f47781d8 MP |
869 | } |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | int unit_attach_pids_to_cgroup(Unit *u) { | |
875 | int r; | |
876 | assert(u); | |
877 | ||
878 | r = unit_realize_cgroup(u); | |
60f067b4 | 879 | if (r < 0) |
f47781d8 MP |
880 | return r; |
881 | ||
882 | r = cg_attach_many_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->pids, migrate_callback, u); | |
883 | if (r < 0) | |
884 | return r; | |
14228c0d | 885 | |
663996b3 MS |
886 | return 0; |
887 | } | |
888 | ||
d9dfd233 | 889 | static bool unit_has_mask_realized(Unit *u, CGroupMask target_mask) { |
60f067b4 JS |
890 | assert(u); |
891 | ||
d9dfd233 | 892 | return u->cgroup_realized && u->cgroup_realized_mask == target_mask; |
60f067b4 JS |
893 | } |
894 | ||
895 | /* Check if necessary controllers and attributes for a unit are in place. | |
896 | * | |
897 | * If so, do nothing. | |
898 | * If not, create paths, move processes over, and set attributes. | |
899 | * | |
900 | * Returns 0 on success and < 0 on failure. */ | |
901 | static int unit_realize_cgroup_now(Unit *u, ManagerState state) { | |
d9dfd233 | 902 | CGroupMask target_mask, enable_mask; |
60f067b4 | 903 | int r; |
663996b3 | 904 | |
14228c0d MB |
905 | assert(u); |
906 | ||
907 | if (u->in_cgroup_queue) { | |
60f067b4 | 908 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
14228c0d MB |
909 | u->in_cgroup_queue = false; |
910 | } | |
911 | ||
d9dfd233 MP |
912 | target_mask = unit_get_target_mask(u); |
913 | if (unit_has_mask_realized(u, target_mask)) | |
663996b3 MS |
914 | return 0; |
915 | ||
14228c0d | 916 | /* First, realize parents */ |
60f067b4 JS |
917 | if (UNIT_ISSET(u->slice)) { |
918 | r = unit_realize_cgroup_now(UNIT_DEREF(u->slice), state); | |
919 | if (r < 0) | |
920 | return r; | |
921 | } | |
663996b3 | 922 | |
14228c0d | 923 | /* And then do the real work */ |
d9dfd233 MP |
924 | enable_mask = unit_get_enable_mask(u); |
925 | r = unit_create_cgroup(u, target_mask, enable_mask); | |
60f067b4 JS |
926 | if (r < 0) |
927 | return r; | |
928 | ||
929 | /* Finally, apply the necessary attributes. */ | |
4c89c718 | 930 | cgroup_context_apply(unit_get_cgroup_context(u), target_mask, u->cgroup_path, state); |
60f067b4 JS |
931 | |
932 | return 0; | |
14228c0d | 933 | } |
663996b3 | 934 | |
14228c0d | 935 | static void unit_add_to_cgroup_queue(Unit *u) { |
663996b3 | 936 | |
14228c0d MB |
937 | if (u->in_cgroup_queue) |
938 | return; | |
939 | ||
60f067b4 | 940 | LIST_PREPEND(cgroup_queue, u->manager->cgroup_queue, u); |
14228c0d | 941 | u->in_cgroup_queue = true; |
663996b3 MS |
942 | } |
943 | ||
14228c0d | 944 | unsigned manager_dispatch_cgroup_queue(Manager *m) { |
60f067b4 | 945 | ManagerState state; |
14228c0d | 946 | unsigned n = 0; |
60f067b4 JS |
947 | Unit *i; |
948 | int r; | |
949 | ||
950 | state = manager_state(m); | |
663996b3 | 951 | |
14228c0d MB |
952 | while ((i = m->cgroup_queue)) { |
953 | assert(i->in_cgroup_queue); | |
954 | ||
60f067b4 JS |
955 | r = unit_realize_cgroup_now(i, state); |
956 | if (r < 0) | |
d9dfd233 | 957 | log_warning_errno(r, "Failed to realize cgroups for queued unit %s, ignoring: %m", i->id); |
14228c0d MB |
958 | |
959 | n++; | |
960 | } | |
961 | ||
962 | return n; | |
963 | } | |
964 | ||
965 | static void unit_queue_siblings(Unit *u) { | |
966 | Unit *slice; | |
967 | ||
968 | /* This adds the siblings of the specified unit and the | |
969 | * siblings of all parent units to the cgroup queue. (But | |
970 | * neither the specified unit itself nor the parents.) */ | |
663996b3 | 971 | |
14228c0d MB |
972 | while ((slice = UNIT_DEREF(u->slice))) { |
973 | Iterator i; | |
974 | Unit *m; | |
663996b3 | 975 | |
14228c0d MB |
976 | SET_FOREACH(m, slice->dependencies[UNIT_BEFORE], i) { |
977 | if (m == u) | |
663996b3 MS |
978 | continue; |
979 | ||
60f067b4 JS |
980 | /* Skip units that have a dependency on the slice |
981 | * but aren't actually in it. */ | |
14228c0d MB |
982 | if (UNIT_DEREF(m->slice) != slice) |
983 | continue; | |
984 | ||
60f067b4 JS |
985 | /* No point in doing cgroup application for units |
986 | * without active processes. */ | |
987 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(m))) | |
988 | continue; | |
989 | ||
990 | /* If the unit doesn't need any new controllers | |
991 | * and has current ones realized, it doesn't need | |
992 | * any changes. */ | |
993 | if (unit_has_mask_realized(m, unit_get_target_mask(m))) | |
994 | continue; | |
995 | ||
14228c0d | 996 | unit_add_to_cgroup_queue(m); |
663996b3 MS |
997 | } |
998 | ||
14228c0d | 999 | u = slice; |
663996b3 | 1000 | } |
14228c0d MB |
1001 | } |
1002 | ||
1003 | int unit_realize_cgroup(Unit *u) { | |
14228c0d MB |
1004 | assert(u); |
1005 | ||
d9dfd233 | 1006 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
14228c0d | 1007 | return 0; |
663996b3 | 1008 | |
14228c0d MB |
1009 | /* So, here's the deal: when realizing the cgroups for this |
1010 | * unit, we need to first create all parents, but there's more | |
1011 | * actually: for the weight-based controllers we also need to | |
1012 | * make sure that all our siblings (i.e. units that are in the | |
60f067b4 | 1013 | * same slice as we are) have cgroups, too. Otherwise, things |
14228c0d MB |
1014 | * would become very uneven as each of their processes would |
1015 | * get as much resources as all our group together. This call | |
1016 | * will synchronously create the parent cgroups, but will | |
1017 | * defer work on the siblings to the next event loop | |
1018 | * iteration. */ | |
663996b3 | 1019 | |
14228c0d MB |
1020 | /* Add all sibling slices to the cgroup queue. */ |
1021 | unit_queue_siblings(u); | |
1022 | ||
60f067b4 JS |
1023 | /* And realize this one now (and apply the values) */ |
1024 | return unit_realize_cgroup_now(u, manager_state(u->manager)); | |
663996b3 MS |
1025 | } |
1026 | ||
d9dfd233 MP |
1027 | void unit_release_cgroup(Unit *u) { |
1028 | assert(u); | |
1029 | ||
1030 | /* Forgets all cgroup details for this cgroup */ | |
1031 | ||
1032 | if (u->cgroup_path) { | |
1033 | (void) hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
1034 | u->cgroup_path = mfree(u->cgroup_path); | |
1035 | } | |
1036 | ||
1037 | if (u->cgroup_inotify_wd >= 0) { | |
1038 | if (inotify_rm_watch(u->manager->cgroup_inotify_fd, u->cgroup_inotify_wd) < 0) | |
1039 | log_unit_debug_errno(u, errno, "Failed to remove cgroup inotify watch %i for %s, ignoring", u->cgroup_inotify_wd, u->id); | |
1040 | ||
1041 | (void) hashmap_remove(u->manager->cgroup_inotify_wd_unit, INT_TO_PTR(u->cgroup_inotify_wd)); | |
1042 | u->cgroup_inotify_wd = -1; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | void unit_prune_cgroup(Unit *u) { | |
663996b3 | 1047 | int r; |
d9dfd233 | 1048 | bool is_root_slice; |
663996b3 | 1049 | |
14228c0d | 1050 | assert(u); |
663996b3 | 1051 | |
d9dfd233 MP |
1052 | /* Removes the cgroup, if empty and possible, and stops watching it. */ |
1053 | ||
14228c0d MB |
1054 | if (!u->cgroup_path) |
1055 | return; | |
1056 | ||
d9dfd233 MP |
1057 | is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE); |
1058 | ||
1059 | r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !is_root_slice); | |
f47781d8 | 1060 | if (r < 0) { |
d9dfd233 | 1061 | log_debug_errno(r, "Failed to destroy cgroup %s, ignoring: %m", u->cgroup_path); |
f47781d8 MP |
1062 | return; |
1063 | } | |
14228c0d | 1064 | |
d9dfd233 MP |
1065 | if (is_root_slice) |
1066 | return; | |
1067 | ||
1068 | unit_release_cgroup(u); | |
663996b3 | 1069 | |
14228c0d | 1070 | u->cgroup_realized = false; |
60f067b4 | 1071 | u->cgroup_realized_mask = 0; |
663996b3 MS |
1072 | } |
1073 | ||
d9dfd233 | 1074 | int unit_search_main_pid(Unit *u, pid_t *ret) { |
14228c0d MB |
1075 | _cleanup_fclose_ FILE *f = NULL; |
1076 | pid_t pid = 0, npid, mypid; | |
d9dfd233 | 1077 | int r; |
663996b3 | 1078 | |
14228c0d | 1079 | assert(u); |
d9dfd233 | 1080 | assert(ret); |
663996b3 | 1081 | |
14228c0d | 1082 | if (!u->cgroup_path) |
d9dfd233 | 1083 | return -ENXIO; |
663996b3 | 1084 | |
d9dfd233 MP |
1085 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &f); |
1086 | if (r < 0) | |
1087 | return r; | |
14228c0d MB |
1088 | |
1089 | mypid = getpid(); | |
1090 | while (cg_read_pid(f, &npid) > 0) { | |
1091 | pid_t ppid; | |
1092 | ||
1093 | if (npid == pid) | |
1094 | continue; | |
1095 | ||
1096 | /* Ignore processes that aren't our kids */ | |
db2df898 | 1097 | if (get_process_ppid(npid, &ppid) >= 0 && ppid != mypid) |
14228c0d MB |
1098 | continue; |
1099 | ||
d9dfd233 | 1100 | if (pid != 0) |
14228c0d MB |
1101 | /* Dang, there's more than one daemonized PID |
1102 | in this group, so we don't know what process | |
1103 | is the main process. */ | |
d9dfd233 MP |
1104 | |
1105 | return -ENODATA; | |
14228c0d MB |
1106 | |
1107 | pid = npid; | |
663996b3 MS |
1108 | } |
1109 | ||
d9dfd233 MP |
1110 | *ret = pid; |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
1115 | _cleanup_closedir_ DIR *d = NULL; | |
1116 | _cleanup_fclose_ FILE *f = NULL; | |
1117 | int ret = 0, r; | |
1118 | ||
1119 | assert(u); | |
1120 | assert(path); | |
1121 | ||
1122 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1123 | if (r < 0) | |
1124 | ret = r; | |
1125 | else { | |
1126 | pid_t pid; | |
1127 | ||
1128 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1129 | r = unit_watch_pid(u, pid); | |
1130 | if (r < 0 && ret >= 0) | |
1131 | ret = r; | |
1132 | } | |
1133 | ||
1134 | if (r < 0 && ret >= 0) | |
1135 | ret = r; | |
1136 | } | |
1137 | ||
1138 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1139 | if (r < 0) { | |
1140 | if (ret >= 0) | |
1141 | ret = r; | |
1142 | } else { | |
1143 | char *fn; | |
1144 | ||
1145 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1146 | _cleanup_free_ char *p = NULL; | |
1147 | ||
1148 | p = strjoin(path, "/", fn, NULL); | |
1149 | free(fn); | |
1150 | ||
1151 | if (!p) | |
1152 | return -ENOMEM; | |
1153 | ||
1154 | r = unit_watch_pids_in_path(u, p); | |
1155 | if (r < 0 && ret >= 0) | |
1156 | ret = r; | |
1157 | } | |
1158 | ||
1159 | if (r < 0 && ret >= 0) | |
1160 | ret = r; | |
1161 | } | |
1162 | ||
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | int unit_watch_all_pids(Unit *u) { | |
1167 | assert(u); | |
1168 | ||
1169 | /* Adds all PIDs from our cgroup to the set of PIDs we | |
1170 | * watch. This is a fallback logic for cases where we do not | |
1171 | * get reliable cgroup empty notifications: we try to use | |
1172 | * SIGCHLD as replacement. */ | |
1173 | ||
1174 | if (!u->cgroup_path) | |
1175 | return -ENOENT; | |
1176 | ||
1177 | if (cg_unified() > 0) /* On unified we can use proper notifications */ | |
1178 | return 0; | |
1179 | ||
1180 | return unit_watch_pids_in_path(u, u->cgroup_path); | |
1181 | } | |
1182 | ||
1183 | int unit_notify_cgroup_empty(Unit *u) { | |
1184 | int r; | |
1185 | ||
1186 | assert(u); | |
1187 | ||
1188 | if (!u->cgroup_path) | |
1189 | return 0; | |
1190 | ||
1191 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
1192 | if (r <= 0) | |
1193 | return r; | |
1194 | ||
1195 | unit_add_to_gc_queue(u); | |
1196 | ||
1197 | if (UNIT_VTABLE(u)->notify_cgroup_empty) | |
1198 | UNIT_VTABLE(u)->notify_cgroup_empty(u); | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
1204 | Manager *m = userdata; | |
1205 | ||
1206 | assert(s); | |
1207 | assert(fd >= 0); | |
1208 | assert(m); | |
1209 | ||
1210 | for (;;) { | |
1211 | union inotify_event_buffer buffer; | |
1212 | struct inotify_event *e; | |
1213 | ssize_t l; | |
1214 | ||
1215 | l = read(fd, &buffer, sizeof(buffer)); | |
1216 | if (l < 0) { | |
1217 | if (errno == EINTR || errno == EAGAIN) | |
1218 | return 0; | |
1219 | ||
1220 | return log_error_errno(errno, "Failed to read control group inotify events: %m"); | |
1221 | } | |
1222 | ||
1223 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
1224 | Unit *u; | |
1225 | ||
1226 | if (e->wd < 0) | |
1227 | /* Queue overflow has no watch descriptor */ | |
1228 | continue; | |
1229 | ||
1230 | if (e->mask & IN_IGNORED) | |
1231 | /* The watch was just removed */ | |
1232 | continue; | |
1233 | ||
1234 | u = hashmap_get(m->cgroup_inotify_wd_unit, INT_TO_PTR(e->wd)); | |
1235 | if (!u) /* Not that inotify might deliver | |
1236 | * events for a watch even after it | |
1237 | * was removed, because it was queued | |
1238 | * before the removal. Let's ignore | |
1239 | * this here safely. */ | |
1240 | continue; | |
1241 | ||
1242 | (void) unit_notify_cgroup_empty(u); | |
1243 | } | |
1244 | } | |
663996b3 MS |
1245 | } |
1246 | ||
1247 | int manager_setup_cgroup(Manager *m) { | |
14228c0d | 1248 | _cleanup_free_ char *path = NULL; |
d9dfd233 MP |
1249 | CGroupController c; |
1250 | int r, unified; | |
1251 | char *e; | |
663996b3 MS |
1252 | |
1253 | assert(m); | |
1254 | ||
663996b3 | 1255 | /* 1. Determine hierarchy */ |
d9dfd233 | 1256 | m->cgroup_root = mfree(m->cgroup_root); |
14228c0d | 1257 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &m->cgroup_root); |
f47781d8 MP |
1258 | if (r < 0) |
1259 | return log_error_errno(r, "Cannot determine cgroup we are running in: %m"); | |
663996b3 | 1260 | |
d9dfd233 MP |
1261 | /* Chop off the init scope, if we are already located in it */ |
1262 | e = endswith(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
5eef597e | 1263 | |
d9dfd233 MP |
1264 | /* LEGACY: Also chop off the system slice if we are in |
1265 | * it. This is to support live upgrades from older systemd | |
1266 | * versions where PID 1 was moved there. Also see | |
1267 | * cg_get_root_path(). */ | |
1268 | if (!e && m->running_as == MANAGER_SYSTEM) { | |
14228c0d | 1269 | e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE); |
60f067b4 | 1270 | if (!e) |
d9dfd233 | 1271 | e = endswith(m->cgroup_root, "/system"); /* even more legacy */ |
663996b3 | 1272 | } |
d9dfd233 MP |
1273 | if (e) |
1274 | *e = 0; | |
663996b3 | 1275 | |
14228c0d MB |
1276 | /* And make sure to store away the root value without trailing |
1277 | * slash, even for the root dir, so that we can easily prepend | |
1278 | * it everywhere. */ | |
d9dfd233 MP |
1279 | while ((e = endswith(m->cgroup_root, "/"))) |
1280 | *e = 0; | |
663996b3 MS |
1281 | |
1282 | /* 2. Show data */ | |
14228c0d | 1283 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, NULL, &path); |
f47781d8 MP |
1284 | if (r < 0) |
1285 | return log_error_errno(r, "Cannot find cgroup mount point: %m"); | |
663996b3 | 1286 | |
d9dfd233 MP |
1287 | unified = cg_unified(); |
1288 | if (unified < 0) | |
1289 | return log_error_errno(r, "Couldn't determine if we are running in the unified hierarchy: %m"); | |
1290 | if (unified > 0) | |
1291 | log_debug("Unified cgroup hierarchy is located at %s.", path); | |
1292 | else | |
1293 | log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path); | |
1294 | ||
5eef597e | 1295 | if (!m->test_run) { |
d9dfd233 | 1296 | const char *scope_path; |
663996b3 | 1297 | |
5eef597e | 1298 | /* 3. Install agent */ |
d9dfd233 MP |
1299 | if (unified) { |
1300 | ||
1301 | /* In the unified hierarchy we can can get | |
1302 | * cgroup empty notifications via inotify. */ | |
1303 | ||
1304 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1305 | safe_close(m->cgroup_inotify_fd); | |
1306 | ||
1307 | m->cgroup_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
1308 | if (m->cgroup_inotify_fd < 0) | |
1309 | return log_error_errno(errno, "Failed to create control group inotify object: %m"); | |
1310 | ||
1311 | r = sd_event_add_io(m->event, &m->cgroup_inotify_event_source, m->cgroup_inotify_fd, EPOLLIN, on_cgroup_inotify_event, m); | |
1312 | if (r < 0) | |
1313 | return log_error_errno(r, "Failed to watch control group inotify object: %m"); | |
1314 | ||
1315 | r = sd_event_source_set_priority(m->cgroup_inotify_event_source, SD_EVENT_PRIORITY_IDLE - 5); | |
1316 | if (r < 0) | |
1317 | return log_error_errno(r, "Failed to set priority of inotify event source: %m"); | |
1318 | ||
1319 | (void) sd_event_source_set_description(m->cgroup_inotify_event_source, "cgroup-inotify"); | |
1320 | ||
1321 | } else if (m->running_as == MANAGER_SYSTEM) { | |
1322 | ||
1323 | /* On the legacy hierarchy we only get | |
1324 | * notifications via cgroup agents. (Which | |
1325 | * isn't really reliable, since it does not | |
1326 | * generate events when control groups with | |
1327 | * children run empty. */ | |
1328 | ||
5eef597e MP |
1329 | r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH); |
1330 | if (r < 0) | |
f47781d8 | 1331 | log_warning_errno(r, "Failed to install release agent, ignoring: %m"); |
5eef597e MP |
1332 | else if (r > 0) |
1333 | log_debug("Installed release agent."); | |
d9dfd233 | 1334 | else if (r == 0) |
5eef597e MP |
1335 | log_debug("Release agent already installed."); |
1336 | } | |
663996b3 | 1337 | |
d9dfd233 MP |
1338 | /* 4. Make sure we are in the special "init.scope" unit in the root slice. */ |
1339 | scope_path = strjoina(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
1340 | r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); | |
1341 | if (r < 0) | |
1342 | return log_error_errno(r, "Failed to create %s control group: %m", scope_path); | |
1343 | ||
1344 | /* also, move all other userspace processes remaining | |
1345 | * in the root cgroup into that scope. */ | |
1346 | r = cg_migrate(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, SYSTEMD_CGROUP_CONTROLLER, scope_path, false); | |
f47781d8 | 1347 | if (r < 0) |
d9dfd233 | 1348 | log_warning_errno(r, "Couldn't move remaining userspace processes, ignoring: %m"); |
663996b3 | 1349 | |
5eef597e MP |
1350 | /* 5. And pin it, so that it cannot be unmounted */ |
1351 | safe_close(m->pin_cgroupfs_fd); | |
5eef597e | 1352 | m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK); |
f47781d8 MP |
1353 | if (m->pin_cgroupfs_fd < 0) |
1354 | return log_error_errno(errno, "Failed to open pin file: %m"); | |
5eef597e | 1355 | |
e735f4d4 | 1356 | /* 6. Always enable hierarchical support if it exists... */ |
d9dfd233 MP |
1357 | if (!unified) |
1358 | (void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1"); | |
663996b3 MS |
1359 | } |
1360 | ||
5eef597e | 1361 | /* 7. Figure out which controllers are supported */ |
d9dfd233 MP |
1362 | r = cg_mask_supported(&m->cgroup_supported); |
1363 | if (r < 0) | |
1364 | return log_error_errno(r, "Failed to determine supported controllers: %m"); | |
1365 | ||
1366 | for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) | |
1367 | log_debug("Controller '%s' supported: %s", cgroup_controller_to_string(c), yes_no(m->cgroup_supported & c)); | |
663996b3 | 1368 | |
663996b3 MS |
1369 | return 0; |
1370 | } | |
1371 | ||
1372 | void manager_shutdown_cgroup(Manager *m, bool delete) { | |
1373 | assert(m); | |
1374 | ||
14228c0d MB |
1375 | /* We can't really delete the group, since we are in it. But |
1376 | * let's trim it. */ | |
1377 | if (delete && m->cgroup_root) | |
d9dfd233 MP |
1378 | (void) cg_trim(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, false); |
1379 | ||
1380 | m->cgroup_inotify_wd_unit = hashmap_free(m->cgroup_inotify_wd_unit); | |
1381 | ||
1382 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
1383 | m->cgroup_inotify_fd = safe_close(m->cgroup_inotify_fd); | |
663996b3 | 1384 | |
60f067b4 | 1385 | m->pin_cgroupfs_fd = safe_close(m->pin_cgroupfs_fd); |
663996b3 | 1386 | |
d9dfd233 | 1387 | m->cgroup_root = mfree(m->cgroup_root); |
663996b3 MS |
1388 | } |
1389 | ||
14228c0d | 1390 | Unit* manager_get_unit_by_cgroup(Manager *m, const char *cgroup) { |
663996b3 | 1391 | char *p; |
14228c0d | 1392 | Unit *u; |
663996b3 MS |
1393 | |
1394 | assert(m); | |
1395 | assert(cgroup); | |
663996b3 | 1396 | |
14228c0d MB |
1397 | u = hashmap_get(m->cgroup_unit, cgroup); |
1398 | if (u) | |
1399 | return u; | |
663996b3 MS |
1400 | |
1401 | p = strdupa(cgroup); | |
663996b3 MS |
1402 | for (;;) { |
1403 | char *e; | |
1404 | ||
1405 | e = strrchr(p, '/'); | |
d9dfd233 MP |
1406 | if (!e || e == p) |
1407 | return hashmap_get(m->cgroup_unit, SPECIAL_ROOT_SLICE); | |
663996b3 MS |
1408 | |
1409 | *e = 0; | |
1410 | ||
14228c0d MB |
1411 | u = hashmap_get(m->cgroup_unit, p); |
1412 | if (u) | |
1413 | return u; | |
663996b3 MS |
1414 | } |
1415 | } | |
1416 | ||
d9dfd233 | 1417 | Unit *manager_get_unit_by_pid_cgroup(Manager *m, pid_t pid) { |
14228c0d | 1418 | _cleanup_free_ char *cgroup = NULL; |
663996b3 MS |
1419 | int r; |
1420 | ||
663996b3 MS |
1421 | assert(m); |
1422 | ||
d9dfd233 | 1423 | if (pid <= 0) |
663996b3 MS |
1424 | return NULL; |
1425 | ||
14228c0d MB |
1426 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &cgroup); |
1427 | if (r < 0) | |
663996b3 MS |
1428 | return NULL; |
1429 | ||
14228c0d | 1430 | return manager_get_unit_by_cgroup(m, cgroup); |
663996b3 MS |
1431 | } |
1432 | ||
d9dfd233 MP |
1433 | Unit *manager_get_unit_by_pid(Manager *m, pid_t pid) { |
1434 | Unit *u; | |
1435 | ||
1436 | assert(m); | |
1437 | ||
1438 | if (pid <= 0) | |
1439 | return NULL; | |
1440 | ||
1441 | if (pid == 1) | |
1442 | return hashmap_get(m->units, SPECIAL_INIT_SCOPE); | |
1443 | ||
1444 | u = hashmap_get(m->watch_pids1, PID_TO_PTR(pid)); | |
1445 | if (u) | |
1446 | return u; | |
1447 | ||
1448 | u = hashmap_get(m->watch_pids2, PID_TO_PTR(pid)); | |
1449 | if (u) | |
1450 | return u; | |
1451 | ||
1452 | return manager_get_unit_by_pid_cgroup(m, pid); | |
1453 | } | |
1454 | ||
14228c0d MB |
1455 | int manager_notify_cgroup_empty(Manager *m, const char *cgroup) { |
1456 | Unit *u; | |
663996b3 | 1457 | |
14228c0d MB |
1458 | assert(m); |
1459 | assert(cgroup); | |
663996b3 | 1460 | |
14228c0d | 1461 | u = manager_get_unit_by_cgroup(m, cgroup); |
e3bff60a MP |
1462 | if (!u) |
1463 | return 0; | |
663996b3 | 1464 | |
d9dfd233 | 1465 | return unit_notify_cgroup_empty(u); |
e3bff60a MP |
1466 | } |
1467 | ||
1468 | int unit_get_memory_current(Unit *u, uint64_t *ret) { | |
1469 | _cleanup_free_ char *v = NULL; | |
1470 | int r; | |
1471 | ||
1472 | assert(u); | |
1473 | assert(ret); | |
1474 | ||
1475 | if (!u->cgroup_path) | |
1476 | return -ENODATA; | |
1477 | ||
d9dfd233 | 1478 | if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0) |
e3bff60a MP |
1479 | return -ENODATA; |
1480 | ||
d9dfd233 MP |
1481 | if (cg_unified() <= 0) |
1482 | r = cg_get_attribute("memory", u->cgroup_path, "memory.usage_in_bytes", &v); | |
1483 | else | |
1484 | r = cg_get_attribute("memory", u->cgroup_path, "memory.current", &v); | |
e3bff60a MP |
1485 | if (r == -ENOENT) |
1486 | return -ENODATA; | |
1487 | if (r < 0) | |
1488 | return r; | |
1489 | ||
1490 | return safe_atou64(v, ret); | |
1491 | } | |
1492 | ||
6300502b MP |
1493 | int unit_get_tasks_current(Unit *u, uint64_t *ret) { |
1494 | _cleanup_free_ char *v = NULL; | |
1495 | int r; | |
1496 | ||
1497 | assert(u); | |
1498 | assert(ret); | |
1499 | ||
1500 | if (!u->cgroup_path) | |
1501 | return -ENODATA; | |
1502 | ||
1503 | if ((u->cgroup_realized_mask & CGROUP_MASK_PIDS) == 0) | |
1504 | return -ENODATA; | |
1505 | ||
1506 | r = cg_get_attribute("pids", u->cgroup_path, "pids.current", &v); | |
1507 | if (r == -ENOENT) | |
1508 | return -ENODATA; | |
1509 | if (r < 0) | |
1510 | return r; | |
1511 | ||
1512 | return safe_atou64(v, ret); | |
1513 | } | |
1514 | ||
e3bff60a MP |
1515 | static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) { |
1516 | _cleanup_free_ char *v = NULL; | |
1517 | uint64_t ns; | |
1518 | int r; | |
1519 | ||
1520 | assert(u); | |
1521 | assert(ret); | |
1522 | ||
1523 | if (!u->cgroup_path) | |
1524 | return -ENODATA; | |
1525 | ||
d9dfd233 | 1526 | if ((u->cgroup_realized_mask & CGROUP_MASK_CPUACCT) == 0) |
e3bff60a MP |
1527 | return -ENODATA; |
1528 | ||
1529 | r = cg_get_attribute("cpuacct", u->cgroup_path, "cpuacct.usage", &v); | |
1530 | if (r == -ENOENT) | |
1531 | return -ENODATA; | |
1532 | if (r < 0) | |
1533 | return r; | |
1534 | ||
1535 | r = safe_atou64(v, &ns); | |
1536 | if (r < 0) | |
1537 | return r; | |
1538 | ||
1539 | *ret = ns; | |
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | int unit_get_cpu_usage(Unit *u, nsec_t *ret) { | |
1544 | nsec_t ns; | |
1545 | int r; | |
1546 | ||
1547 | r = unit_get_cpu_usage_raw(u, &ns); | |
1548 | if (r < 0) | |
1549 | return r; | |
1550 | ||
1551 | if (ns > u->cpuacct_usage_base) | |
1552 | ns -= u->cpuacct_usage_base; | |
1553 | else | |
1554 | ns = 0; | |
1555 | ||
1556 | *ret = ns; | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | int unit_reset_cpu_usage(Unit *u) { | |
1561 | nsec_t ns; | |
1562 | int r; | |
1563 | ||
1564 | assert(u); | |
1565 | ||
1566 | r = unit_get_cpu_usage_raw(u, &ns); | |
1567 | if (r < 0) { | |
1568 | u->cpuacct_usage_base = 0; | |
1569 | return r; | |
663996b3 MS |
1570 | } |
1571 | ||
e3bff60a | 1572 | u->cpuacct_usage_base = ns; |
14228c0d | 1573 | return 0; |
663996b3 MS |
1574 | } |
1575 | ||
d9dfd233 MP |
1576 | bool unit_cgroup_delegate(Unit *u) { |
1577 | CGroupContext *c; | |
1578 | ||
1579 | assert(u); | |
1580 | ||
1581 | c = unit_get_cgroup_context(u); | |
1582 | if (!c) | |
1583 | return false; | |
1584 | ||
1585 | return c->delegate; | |
1586 | } | |
1587 | ||
6300502b MP |
1588 | void unit_invalidate_cgroup(Unit *u, CGroupMask m) { |
1589 | assert(u); | |
1590 | ||
1591 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
1592 | return; | |
1593 | ||
1594 | if (m == 0) | |
1595 | return; | |
1596 | ||
1597 | if ((u->cgroup_realized_mask & m) == 0) | |
1598 | return; | |
1599 | ||
1600 | u->cgroup_realized_mask &= ~m; | |
1601 | unit_add_to_cgroup_queue(u); | |
1602 | } | |
1603 | ||
1604 | void manager_invalidate_startup_units(Manager *m) { | |
1605 | Iterator i; | |
1606 | Unit *u; | |
1607 | ||
1608 | assert(m); | |
1609 | ||
1610 | SET_FOREACH(u, m->startup_units, i) | |
1611 | unit_invalidate_cgroup(u, CGROUP_MASK_CPU|CGROUP_MASK_BLKIO); | |
1612 | } | |
1613 | ||
14228c0d MB |
1614 | static const char* const cgroup_device_policy_table[_CGROUP_DEVICE_POLICY_MAX] = { |
1615 | [CGROUP_AUTO] = "auto", | |
1616 | [CGROUP_CLOSED] = "closed", | |
1617 | [CGROUP_STRICT] = "strict", | |
1618 | }; | |
663996b3 | 1619 | |
14228c0d | 1620 | DEFINE_STRING_TABLE_LOOKUP(cgroup_device_policy, CGroupDevicePolicy); |