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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
8e274523 | 2 | |
c6c18be3 | 3 | #include <fcntl.h> |
8c6db833 | 4 | |
afcfaa69 LP |
5 | #include "sd-messages.h" |
6 | ||
b5efdb8a | 7 | #include "alloc-util.h" |
18c528e9 | 8 | #include "blockdev-util.h" |
d8b4d14d | 9 | #include "bpf-devices.h" |
906c06f6 | 10 | #include "bpf-firewall.h" |
45c2e068 | 11 | #include "btrfs-util.h" |
6592b975 | 12 | #include "bus-error.h" |
fdb3deca | 13 | #include "cgroup-setup.h" |
03a7b521 | 14 | #include "cgroup-util.h" |
3ffd4af2 LP |
15 | #include "cgroup.h" |
16 | #include "fd-util.h" | |
0d39fa9c | 17 | #include "fileio.h" |
77601719 | 18 | #include "fs-util.h" |
d9e45bc3 | 19 | #include "io-util.h" |
3a0f06c4 | 20 | #include "limits-util.h" |
d9e45bc3 | 21 | #include "nulstr-util.h" |
6bedfcbb | 22 | #include "parse-util.h" |
9eb977db | 23 | #include "path-util.h" |
03a7b521 | 24 | #include "process-util.h" |
c36a69f4 | 25 | #include "procfs-util.h" |
9444b1f2 | 26 | #include "special.h" |
74c48bf5 | 27 | #include "stat-util.h" |
906c06f6 | 28 | #include "stdio-util.h" |
8b43440b | 29 | #include "string-table.h" |
07630cea | 30 | #include "string-util.h" |
cc6271f1 | 31 | #include "virt.h" |
8e274523 | 32 | |
10f28641 | 33 | #define CGROUP_CPU_QUOTA_DEFAULT_PERIOD_USEC ((usec_t) 100 * USEC_PER_MSEC) |
9a054909 | 34 | |
39b9fefb LP |
35 | /* Returns the log level to use when cgroup attribute writes fail. When an attribute is missing or we have access |
36 | * problems we downgrade to LOG_DEBUG. This is supposed to be nice to container managers and kernels which want to mask | |
37 | * out specific attributes from us. */ | |
38 | #define LOG_LEVEL_CGROUP_WRITE(r) (IN_SET(abs(r), ENOENT, EROFS, EACCES, EPERM) ? LOG_DEBUG : LOG_WARNING) | |
39 | ||
3a0f06c4 ZJS |
40 | uint64_t tasks_max_resolve(const TasksMax *tasks_max) { |
41 | if (tasks_max->scale == 0) | |
42 | return tasks_max->value; | |
43 | ||
44 | return system_tasks_max_scale(tasks_max->value, tasks_max->scale); | |
45 | } | |
46 | ||
611c4f8a | 47 | bool manager_owns_host_root_cgroup(Manager *m) { |
cc6271f1 LP |
48 | assert(m); |
49 | ||
50 | /* Returns true if we are managing the root cgroup. Note that it isn't sufficient to just check whether the | |
51 | * group root path equals "/" since that will also be the case if CLONE_NEWCGROUP is in the mix. Since there's | |
52 | * appears to be no nice way to detect whether we are in a CLONE_NEWCGROUP namespace we instead just check if | |
53 | * we run in any kind of container virtualization. */ | |
54 | ||
28cfdc5a LP |
55 | if (MANAGER_IS_USER(m)) |
56 | return false; | |
57 | ||
cc6271f1 LP |
58 | if (detect_container() > 0) |
59 | return false; | |
60 | ||
57ea45e1 | 61 | return empty_or_root(m->cgroup_root); |
cc6271f1 LP |
62 | } |
63 | ||
611c4f8a | 64 | bool unit_has_host_root_cgroup(Unit *u) { |
f3725e64 LP |
65 | assert(u); |
66 | ||
cc6271f1 LP |
67 | /* Returns whether this unit manages the root cgroup. This will return true if this unit is the root slice and |
68 | * the manager manages the root cgroup. */ | |
f3725e64 | 69 | |
611c4f8a | 70 | if (!manager_owns_host_root_cgroup(u->manager)) |
f3725e64 LP |
71 | return false; |
72 | ||
cc6271f1 | 73 | return unit_has_name(u, SPECIAL_ROOT_SLICE); |
f3725e64 LP |
74 | } |
75 | ||
293d32df LP |
76 | static int set_attribute_and_warn(Unit *u, const char *controller, const char *attribute, const char *value) { |
77 | int r; | |
78 | ||
79 | r = cg_set_attribute(controller, u->cgroup_path, attribute, value); | |
80 | if (r < 0) | |
81 | log_unit_full(u, LOG_LEVEL_CGROUP_WRITE(r), r, "Failed to set '%s' attribute on '%s' to '%.*s': %m", | |
82 | strna(attribute), isempty(u->cgroup_path) ? "/" : u->cgroup_path, (int) strcspn(value, NEWLINE), value); | |
83 | ||
84 | return r; | |
85 | } | |
86 | ||
2b40998d | 87 | static void cgroup_compat_warn(void) { |
128fadc9 TH |
88 | static bool cgroup_compat_warned = false; |
89 | ||
90 | if (cgroup_compat_warned) | |
91 | return; | |
92 | ||
cc6271f1 LP |
93 | log_warning("cgroup compatibility translation between legacy and unified hierarchy settings activated. " |
94 | "See cgroup-compat debug messages for details."); | |
95 | ||
128fadc9 TH |
96 | cgroup_compat_warned = true; |
97 | } | |
98 | ||
99 | #define log_cgroup_compat(unit, fmt, ...) do { \ | |
100 | cgroup_compat_warn(); \ | |
101 | log_unit_debug(unit, "cgroup-compat: " fmt, ##__VA_ARGS__); \ | |
2b40998d | 102 | } while (false) |
128fadc9 | 103 | |
4ad49000 LP |
104 | void cgroup_context_init(CGroupContext *c) { |
105 | assert(c); | |
106 | ||
de8a711a | 107 | /* Initialize everything to the kernel defaults. */ |
4ad49000 | 108 | |
de8a711a LP |
109 | *c = (CGroupContext) { |
110 | .cpu_weight = CGROUP_WEIGHT_INVALID, | |
111 | .startup_cpu_weight = CGROUP_WEIGHT_INVALID, | |
112 | .cpu_quota_per_sec_usec = USEC_INFINITY, | |
10f28641 | 113 | .cpu_quota_period_usec = USEC_INFINITY, |
66ebf6c0 | 114 | |
de8a711a LP |
115 | .cpu_shares = CGROUP_CPU_SHARES_INVALID, |
116 | .startup_cpu_shares = CGROUP_CPU_SHARES_INVALID, | |
d53d9474 | 117 | |
de8a711a LP |
118 | .memory_high = CGROUP_LIMIT_MAX, |
119 | .memory_max = CGROUP_LIMIT_MAX, | |
120 | .memory_swap_max = CGROUP_LIMIT_MAX, | |
da4d897e | 121 | |
de8a711a | 122 | .memory_limit = CGROUP_LIMIT_MAX, |
b2f8b02e | 123 | |
de8a711a LP |
124 | .io_weight = CGROUP_WEIGHT_INVALID, |
125 | .startup_io_weight = CGROUP_WEIGHT_INVALID, | |
13c31542 | 126 | |
de8a711a LP |
127 | .blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID, |
128 | .startup_blockio_weight = CGROUP_BLKIO_WEIGHT_INVALID, | |
d53d9474 | 129 | |
3a0f06c4 | 130 | .tasks_max = TASKS_MAX_UNSET, |
de8a711a | 131 | }; |
4ad49000 | 132 | } |
8e274523 | 133 | |
4ad49000 LP |
134 | void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a) { |
135 | assert(c); | |
136 | assert(a); | |
137 | ||
71fda00f | 138 | LIST_REMOVE(device_allow, c->device_allow, a); |
4ad49000 LP |
139 | free(a->path); |
140 | free(a); | |
141 | } | |
142 | ||
13c31542 TH |
143 | void cgroup_context_free_io_device_weight(CGroupContext *c, CGroupIODeviceWeight *w) { |
144 | assert(c); | |
145 | assert(w); | |
146 | ||
147 | LIST_REMOVE(device_weights, c->io_device_weights, w); | |
148 | free(w->path); | |
149 | free(w); | |
150 | } | |
151 | ||
6ae4283c TH |
152 | void cgroup_context_free_io_device_latency(CGroupContext *c, CGroupIODeviceLatency *l) { |
153 | assert(c); | |
154 | assert(l); | |
155 | ||
156 | LIST_REMOVE(device_latencies, c->io_device_latencies, l); | |
157 | free(l->path); | |
158 | free(l); | |
159 | } | |
160 | ||
13c31542 TH |
161 | void cgroup_context_free_io_device_limit(CGroupContext *c, CGroupIODeviceLimit *l) { |
162 | assert(c); | |
163 | assert(l); | |
164 | ||
165 | LIST_REMOVE(device_limits, c->io_device_limits, l); | |
166 | free(l->path); | |
167 | free(l); | |
168 | } | |
169 | ||
4ad49000 LP |
170 | void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w) { |
171 | assert(c); | |
172 | assert(w); | |
173 | ||
71fda00f | 174 | LIST_REMOVE(device_weights, c->blockio_device_weights, w); |
4ad49000 LP |
175 | free(w->path); |
176 | free(w); | |
177 | } | |
178 | ||
179 | void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b) { | |
180 | assert(c); | |
8e274523 | 181 | assert(b); |
8e274523 | 182 | |
71fda00f | 183 | LIST_REMOVE(device_bandwidths, c->blockio_device_bandwidths, b); |
4ad49000 LP |
184 | free(b->path); |
185 | free(b); | |
186 | } | |
187 | ||
188 | void cgroup_context_done(CGroupContext *c) { | |
189 | assert(c); | |
190 | ||
13c31542 TH |
191 | while (c->io_device_weights) |
192 | cgroup_context_free_io_device_weight(c, c->io_device_weights); | |
193 | ||
6ae4283c TH |
194 | while (c->io_device_latencies) |
195 | cgroup_context_free_io_device_latency(c, c->io_device_latencies); | |
196 | ||
13c31542 TH |
197 | while (c->io_device_limits) |
198 | cgroup_context_free_io_device_limit(c, c->io_device_limits); | |
199 | ||
4ad49000 LP |
200 | while (c->blockio_device_weights) |
201 | cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights); | |
202 | ||
203 | while (c->blockio_device_bandwidths) | |
204 | cgroup_context_free_blockio_device_bandwidth(c, c->blockio_device_bandwidths); | |
205 | ||
206 | while (c->device_allow) | |
207 | cgroup_context_free_device_allow(c, c->device_allow); | |
6a48d82f DM |
208 | |
209 | c->ip_address_allow = ip_address_access_free_all(c->ip_address_allow); | |
210 | c->ip_address_deny = ip_address_access_free_all(c->ip_address_deny); | |
fab34748 KL |
211 | |
212 | c->ip_filters_ingress = strv_free(c->ip_filters_ingress); | |
213 | c->ip_filters_egress = strv_free(c->ip_filters_egress); | |
047f5d63 PH |
214 | |
215 | cpu_set_reset(&c->cpuset_cpus); | |
216 | cpu_set_reset(&c->cpuset_mems); | |
4ad49000 LP |
217 | } |
218 | ||
74b5fb27 | 219 | static int unit_get_kernel_memory_limit(Unit *u, const char *file, uint64_t *ret) { |
74b5fb27 CD |
220 | assert(u); |
221 | ||
222 | if (!u->cgroup_realized) | |
223 | return -EOWNERDEAD; | |
224 | ||
613328c3 | 225 | return cg_get_attribute_as_uint64("memory", u->cgroup_path, file, ret); |
74b5fb27 CD |
226 | } |
227 | ||
228 | static int unit_compare_memory_limit(Unit *u, const char *property_name, uint64_t *ret_unit_value, uint64_t *ret_kernel_value) { | |
229 | CGroupContext *c; | |
230 | CGroupMask m; | |
231 | const char *file; | |
232 | uint64_t unit_value; | |
233 | int r; | |
234 | ||
235 | /* Compare kernel memcg configuration against our internal systemd state. Unsupported (and will | |
236 | * return -ENODATA) on cgroup v1. | |
237 | * | |
238 | * Returns: | |
239 | * | |
240 | * <0: On error. | |
241 | * 0: If the kernel memory setting doesn't match our configuration. | |
242 | * >0: If the kernel memory setting matches our configuration. | |
243 | * | |
244 | * The following values are only guaranteed to be populated on return >=0: | |
245 | * | |
246 | * - ret_unit_value will contain our internal expected value for the unit, page-aligned. | |
247 | * - ret_kernel_value will contain the actual value presented by the kernel. */ | |
248 | ||
249 | assert(u); | |
250 | ||
251 | r = cg_all_unified(); | |
252 | if (r < 0) | |
253 | return log_debug_errno(r, "Failed to determine cgroup hierarchy version: %m"); | |
254 | ||
255 | /* Unsupported on v1. | |
256 | * | |
257 | * We don't return ENOENT, since that could actually mask a genuine problem where somebody else has | |
258 | * silently masked the controller. */ | |
259 | if (r == 0) | |
260 | return -ENODATA; | |
261 | ||
262 | /* The root slice doesn't have any controller files, so we can't compare anything. */ | |
263 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
264 | return -ENODATA; | |
265 | ||
266 | /* It's possible to have MemoryFoo set without systemd wanting to have the memory controller enabled, | |
267 | * for example, in the case of DisableControllers= or cgroup_disable on the kernel command line. To | |
268 | * avoid specious errors in these scenarios, check that we even expect the memory controller to be | |
269 | * enabled at all. */ | |
270 | m = unit_get_target_mask(u); | |
271 | if (!FLAGS_SET(m, CGROUP_MASK_MEMORY)) | |
272 | return -ENODATA; | |
273 | ||
274 | c = unit_get_cgroup_context(u); | |
275 | assert(c); | |
276 | ||
277 | if (streq(property_name, "MemoryLow")) { | |
278 | unit_value = unit_get_ancestor_memory_low(u); | |
279 | file = "memory.low"; | |
280 | } else if (streq(property_name, "MemoryMin")) { | |
281 | unit_value = unit_get_ancestor_memory_min(u); | |
282 | file = "memory.min"; | |
283 | } else if (streq(property_name, "MemoryHigh")) { | |
284 | unit_value = c->memory_high; | |
285 | file = "memory.high"; | |
286 | } else if (streq(property_name, "MemoryMax")) { | |
287 | unit_value = c->memory_max; | |
288 | file = "memory.max"; | |
289 | } else if (streq(property_name, "MemorySwapMax")) { | |
290 | unit_value = c->memory_swap_max; | |
291 | file = "memory.swap.max"; | |
292 | } else | |
293 | return -EINVAL; | |
294 | ||
295 | r = unit_get_kernel_memory_limit(u, file, ret_kernel_value); | |
296 | if (r < 0) | |
297 | return log_unit_debug_errno(u, r, "Failed to parse %s: %m", file); | |
298 | ||
299 | /* It's intended (soon) in a future kernel to not expose cgroup memory limits rounded to page | |
300 | * boundaries, but instead separate the user-exposed limit, which is whatever userspace told us, from | |
301 | * our internal page-counting. To support those future kernels, just check the value itself first | |
302 | * without any page-alignment. */ | |
303 | if (*ret_kernel_value == unit_value) { | |
304 | *ret_unit_value = unit_value; | |
305 | return 1; | |
306 | } | |
307 | ||
308 | /* The current kernel behaviour, by comparison, is that even if you write a particular number of | |
309 | * bytes into a cgroup memory file, it always returns that number page-aligned down (since the kernel | |
310 | * internally stores cgroup limits in pages). As such, so long as it aligns properly, everything is | |
311 | * cricket. */ | |
312 | if (unit_value != CGROUP_LIMIT_MAX) | |
313 | unit_value = PAGE_ALIGN_DOWN(unit_value); | |
314 | ||
315 | *ret_unit_value = unit_value; | |
316 | ||
317 | return *ret_kernel_value == *ret_unit_value; | |
318 | } | |
319 | ||
bc0623df CD |
320 | #define FORMAT_CGROUP_DIFF_MAX 128 |
321 | ||
322 | static char *format_cgroup_memory_limit_comparison(char *buf, size_t l, Unit *u, const char *property_name) { | |
323 | uint64_t kval, sval; | |
324 | int r; | |
325 | ||
326 | assert(u); | |
327 | assert(buf); | |
328 | assert(l > 0); | |
329 | ||
330 | r = unit_compare_memory_limit(u, property_name, &sval, &kval); | |
331 | ||
332 | /* memory.swap.max is special in that it relies on CONFIG_MEMCG_SWAP (and the default swapaccount=1). | |
333 | * In the absence of reliably being able to detect whether memcg swap support is available or not, | |
334 | * only complain if the error is not ENOENT. */ | |
335 | if (r > 0 || IN_SET(r, -ENODATA, -EOWNERDEAD) || | |
336 | (r == -ENOENT && streq(property_name, "MemorySwapMax"))) { | |
337 | buf[0] = 0; | |
338 | return buf; | |
339 | } | |
340 | ||
341 | if (r < 0) { | |
342 | snprintf(buf, l, " (error getting kernel value: %s)", strerror_safe(r)); | |
343 | return buf; | |
344 | } | |
345 | ||
346 | snprintf(buf, l, " (different value in kernel: %" PRIu64 ")", kval); | |
347 | ||
348 | return buf; | |
349 | } | |
350 | ||
351 | void cgroup_context_dump(Unit *u, FILE* f, const char *prefix) { | |
85c3b278 | 352 | _cleanup_free_ char *disable_controllers_str = NULL, *cpuset_cpus = NULL, *cpuset_mems = NULL; |
13c31542 TH |
353 | CGroupIODeviceLimit *il; |
354 | CGroupIODeviceWeight *iw; | |
6ae4283c | 355 | CGroupIODeviceLatency *l; |
4ad49000 LP |
356 | CGroupBlockIODeviceBandwidth *b; |
357 | CGroupBlockIODeviceWeight *w; | |
358 | CGroupDeviceAllow *a; | |
bc0623df | 359 | CGroupContext *c; |
c21c9906 | 360 | IPAddressAccessItem *iaai; |
fab34748 | 361 | char **path; |
bc0623df | 362 | char q[FORMAT_TIMESPAN_MAX]; |
10f28641 | 363 | char v[FORMAT_TIMESPAN_MAX]; |
4ad49000 | 364 | |
bc0623df CD |
365 | char cda[FORMAT_CGROUP_DIFF_MAX]; |
366 | char cdb[FORMAT_CGROUP_DIFF_MAX]; | |
367 | char cdc[FORMAT_CGROUP_DIFF_MAX]; | |
368 | char cdd[FORMAT_CGROUP_DIFF_MAX]; | |
369 | char cde[FORMAT_CGROUP_DIFF_MAX]; | |
370 | ||
371 | assert(u); | |
4ad49000 LP |
372 | assert(f); |
373 | ||
bc0623df CD |
374 | c = unit_get_cgroup_context(u); |
375 | assert(c); | |
376 | ||
4ad49000 LP |
377 | prefix = strempty(prefix); |
378 | ||
25cc30c4 AZ |
379 | (void) cg_mask_to_string(c->disable_controllers, &disable_controllers_str); |
380 | ||
047f5d63 PH |
381 | cpuset_cpus = cpu_set_to_range_string(&c->cpuset_cpus); |
382 | cpuset_mems = cpu_set_to_range_string(&c->cpuset_mems); | |
383 | ||
4ad49000 | 384 | fprintf(f, |
6dfb9282 CD |
385 | "%sCPUAccounting: %s\n" |
386 | "%sIOAccounting: %s\n" | |
387 | "%sBlockIOAccounting: %s\n" | |
388 | "%sMemoryAccounting: %s\n" | |
389 | "%sTasksAccounting: %s\n" | |
390 | "%sIPAccounting: %s\n" | |
391 | "%sCPUWeight: %" PRIu64 "\n" | |
392 | "%sStartupCPUWeight: %" PRIu64 "\n" | |
393 | "%sCPUShares: %" PRIu64 "\n" | |
394 | "%sStartupCPUShares: %" PRIu64 "\n" | |
395 | "%sCPUQuotaPerSecSec: %s\n" | |
396 | "%sCPUQuotaPeriodSec: %s\n" | |
397 | "%sAllowedCPUs: %s\n" | |
398 | "%sAllowedMemoryNodes: %s\n" | |
399 | "%sIOWeight: %" PRIu64 "\n" | |
400 | "%sStartupIOWeight: %" PRIu64 "\n" | |
401 | "%sBlockIOWeight: %" PRIu64 "\n" | |
402 | "%sStartupBlockIOWeight: %" PRIu64 "\n" | |
403 | "%sDefaultMemoryMin: %" PRIu64 "\n" | |
404 | "%sDefaultMemoryLow: %" PRIu64 "\n" | |
bc0623df CD |
405 | "%sMemoryMin: %" PRIu64 "%s\n" |
406 | "%sMemoryLow: %" PRIu64 "%s\n" | |
407 | "%sMemoryHigh: %" PRIu64 "%s\n" | |
408 | "%sMemoryMax: %" PRIu64 "%s\n" | |
409 | "%sMemorySwapMax: %" PRIu64 "%s\n" | |
6dfb9282 CD |
410 | "%sMemoryLimit: %" PRIu64 "\n" |
411 | "%sTasksMax: %" PRIu64 "\n" | |
412 | "%sDevicePolicy: %s\n" | |
413 | "%sDisableControllers: %s\n" | |
414 | "%sDelegate: %s\n", | |
4ad49000 | 415 | prefix, yes_no(c->cpu_accounting), |
13c31542 | 416 | prefix, yes_no(c->io_accounting), |
4ad49000 LP |
417 | prefix, yes_no(c->blockio_accounting), |
418 | prefix, yes_no(c->memory_accounting), | |
d53d9474 | 419 | prefix, yes_no(c->tasks_accounting), |
c21c9906 | 420 | prefix, yes_no(c->ip_accounting), |
66ebf6c0 TH |
421 | prefix, c->cpu_weight, |
422 | prefix, c->startup_cpu_weight, | |
4ad49000 | 423 | prefix, c->cpu_shares, |
95ae05c0 | 424 | prefix, c->startup_cpu_shares, |
bc0623df | 425 | prefix, format_timespan(q, sizeof(q), c->cpu_quota_per_sec_usec, 1), |
10f28641 | 426 | prefix, format_timespan(v, sizeof(v), c->cpu_quota_period_usec, 1), |
85c3b278 LP |
427 | prefix, strempty(cpuset_cpus), |
428 | prefix, strempty(cpuset_mems), | |
13c31542 TH |
429 | prefix, c->io_weight, |
430 | prefix, c->startup_io_weight, | |
4ad49000 | 431 | prefix, c->blockio_weight, |
95ae05c0 | 432 | prefix, c->startup_blockio_weight, |
7ad5439e | 433 | prefix, c->default_memory_min, |
c52db42b | 434 | prefix, c->default_memory_low, |
bc0623df CD |
435 | prefix, c->memory_min, format_cgroup_memory_limit_comparison(cda, sizeof(cda), u, "MemoryMin"), |
436 | prefix, c->memory_low, format_cgroup_memory_limit_comparison(cdb, sizeof(cdb), u, "MemoryLow"), | |
437 | prefix, c->memory_high, format_cgroup_memory_limit_comparison(cdc, sizeof(cdc), u, "MemoryHigh"), | |
438 | prefix, c->memory_max, format_cgroup_memory_limit_comparison(cdd, sizeof(cdd), u, "MemoryMax"), | |
439 | prefix, c->memory_swap_max, format_cgroup_memory_limit_comparison(cde, sizeof(cde), u, "MemorySwapMax"), | |
4ad49000 | 440 | prefix, c->memory_limit, |
3a0f06c4 | 441 | prefix, tasks_max_resolve(&c->tasks_max), |
a931ad47 | 442 | prefix, cgroup_device_policy_to_string(c->device_policy), |
f4c43a81 | 443 | prefix, strempty(disable_controllers_str), |
a931ad47 | 444 | prefix, yes_no(c->delegate)); |
4ad49000 | 445 | |
02638280 LP |
446 | if (c->delegate) { |
447 | _cleanup_free_ char *t = NULL; | |
448 | ||
449 | (void) cg_mask_to_string(c->delegate_controllers, &t); | |
450 | ||
6dfb9282 | 451 | fprintf(f, "%sDelegateControllers: %s\n", |
02638280 LP |
452 | prefix, |
453 | strempty(t)); | |
454 | } | |
455 | ||
4ad49000 LP |
456 | LIST_FOREACH(device_allow, a, c->device_allow) |
457 | fprintf(f, | |
6dfb9282 | 458 | "%sDeviceAllow: %s %s%s%s\n", |
4ad49000 LP |
459 | prefix, |
460 | a->path, | |
461 | a->r ? "r" : "", a->w ? "w" : "", a->m ? "m" : ""); | |
462 | ||
13c31542 TH |
463 | LIST_FOREACH(device_weights, iw, c->io_device_weights) |
464 | fprintf(f, | |
6dfb9282 | 465 | "%sIODeviceWeight: %s %" PRIu64 "\n", |
13c31542 TH |
466 | prefix, |
467 | iw->path, | |
468 | iw->weight); | |
469 | ||
6ae4283c TH |
470 | LIST_FOREACH(device_latencies, l, c->io_device_latencies) |
471 | fprintf(f, | |
6dfb9282 | 472 | "%sIODeviceLatencyTargetSec: %s %s\n", |
6ae4283c TH |
473 | prefix, |
474 | l->path, | |
bc0623df | 475 | format_timespan(q, sizeof(q), l->target_usec, 1)); |
6ae4283c | 476 | |
13c31542 TH |
477 | LIST_FOREACH(device_limits, il, c->io_device_limits) { |
478 | char buf[FORMAT_BYTES_MAX]; | |
9be57249 TH |
479 | CGroupIOLimitType type; |
480 | ||
481 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) | |
482 | if (il->limits[type] != cgroup_io_limit_defaults[type]) | |
483 | fprintf(f, | |
6dfb9282 | 484 | "%s%s: %s %s\n", |
9be57249 TH |
485 | prefix, |
486 | cgroup_io_limit_type_to_string(type), | |
487 | il->path, | |
488 | format_bytes(buf, sizeof(buf), il->limits[type])); | |
13c31542 TH |
489 | } |
490 | ||
4ad49000 LP |
491 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) |
492 | fprintf(f, | |
6dfb9282 | 493 | "%sBlockIODeviceWeight: %s %" PRIu64, |
4ad49000 LP |
494 | prefix, |
495 | w->path, | |
496 | w->weight); | |
497 | ||
498 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { | |
499 | char buf[FORMAT_BYTES_MAX]; | |
500 | ||
979d0311 TH |
501 | if (b->rbps != CGROUP_LIMIT_MAX) |
502 | fprintf(f, | |
6dfb9282 | 503 | "%sBlockIOReadBandwidth: %s %s\n", |
979d0311 TH |
504 | prefix, |
505 | b->path, | |
506 | format_bytes(buf, sizeof(buf), b->rbps)); | |
507 | if (b->wbps != CGROUP_LIMIT_MAX) | |
508 | fprintf(f, | |
6dfb9282 | 509 | "%sBlockIOWriteBandwidth: %s %s\n", |
979d0311 TH |
510 | prefix, |
511 | b->path, | |
512 | format_bytes(buf, sizeof(buf), b->wbps)); | |
4ad49000 | 513 | } |
c21c9906 LP |
514 | |
515 | LIST_FOREACH(items, iaai, c->ip_address_allow) { | |
516 | _cleanup_free_ char *k = NULL; | |
517 | ||
518 | (void) in_addr_to_string(iaai->family, &iaai->address, &k); | |
6dfb9282 | 519 | fprintf(f, "%sIPAddressAllow: %s/%u\n", prefix, strnull(k), iaai->prefixlen); |
c21c9906 LP |
520 | } |
521 | ||
522 | LIST_FOREACH(items, iaai, c->ip_address_deny) { | |
523 | _cleanup_free_ char *k = NULL; | |
524 | ||
525 | (void) in_addr_to_string(iaai->family, &iaai->address, &k); | |
6dfb9282 | 526 | fprintf(f, "%sIPAddressDeny: %s/%u\n", prefix, strnull(k), iaai->prefixlen); |
c21c9906 | 527 | } |
fab34748 KL |
528 | |
529 | STRV_FOREACH(path, c->ip_filters_ingress) | |
6dfb9282 | 530 | fprintf(f, "%sIPIngressFilterPath: %s\n", prefix, *path); |
fab34748 KL |
531 | |
532 | STRV_FOREACH(path, c->ip_filters_egress) | |
6dfb9282 | 533 | fprintf(f, "%sIPEgressFilterPath: %s\n", prefix, *path); |
4ad49000 LP |
534 | } |
535 | ||
fd870bac YW |
536 | int cgroup_add_device_allow(CGroupContext *c, const char *dev, const char *mode) { |
537 | _cleanup_free_ CGroupDeviceAllow *a = NULL; | |
538 | _cleanup_free_ char *d = NULL; | |
539 | ||
540 | assert(c); | |
541 | assert(dev); | |
542 | assert(isempty(mode) || in_charset(mode, "rwm")); | |
543 | ||
544 | a = new(CGroupDeviceAllow, 1); | |
545 | if (!a) | |
546 | return -ENOMEM; | |
547 | ||
548 | d = strdup(dev); | |
549 | if (!d) | |
550 | return -ENOMEM; | |
551 | ||
552 | *a = (CGroupDeviceAllow) { | |
553 | .path = TAKE_PTR(d), | |
490c5a37 LP |
554 | .r = isempty(mode) || strchr(mode, 'r'), |
555 | .w = isempty(mode) || strchr(mode, 'w'), | |
556 | .m = isempty(mode) || strchr(mode, 'm'), | |
fd870bac YW |
557 | }; |
558 | ||
559 | LIST_PREPEND(device_allow, c->device_allow, a); | |
560 | TAKE_PTR(a); | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
6264b85e CD |
565 | #define UNIT_DEFINE_ANCESTOR_MEMORY_LOOKUP(entry) \ |
566 | uint64_t unit_get_ancestor_##entry(Unit *u) { \ | |
567 | CGroupContext *c; \ | |
568 | \ | |
569 | /* 1. Is entry set in this unit? If so, use that. \ | |
570 | * 2. Is the default for this entry set in any \ | |
571 | * ancestor? If so, use that. \ | |
572 | * 3. Otherwise, return CGROUP_LIMIT_MIN. */ \ | |
573 | \ | |
574 | assert(u); \ | |
575 | \ | |
576 | c = unit_get_cgroup_context(u); \ | |
c5322608 | 577 | if (c && c->entry##_set) \ |
6264b85e CD |
578 | return c->entry; \ |
579 | \ | |
c5322608 | 580 | while ((u = UNIT_DEREF(u->slice))) { \ |
6264b85e | 581 | c = unit_get_cgroup_context(u); \ |
c5322608 | 582 | if (c && c->default_##entry##_set) \ |
6264b85e CD |
583 | return c->default_##entry; \ |
584 | } \ | |
585 | \ | |
586 | /* We've reached the root, but nobody had default for \ | |
587 | * this entry set, so set it to the kernel default. */ \ | |
588 | return CGROUP_LIMIT_MIN; \ | |
c52db42b CD |
589 | } |
590 | ||
6264b85e | 591 | UNIT_DEFINE_ANCESTOR_MEMORY_LOOKUP(memory_low); |
7ad5439e | 592 | UNIT_DEFINE_ANCESTOR_MEMORY_LOOKUP(memory_min); |
6264b85e | 593 | |
0d2d6fbf CD |
594 | static void cgroup_xattr_apply(Unit *u) { |
595 | char ids[SD_ID128_STRING_MAX]; | |
596 | int r; | |
597 | ||
598 | assert(u); | |
599 | ||
600 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
601 | return; | |
602 | ||
3288ea8f LP |
603 | if (!sd_id128_is_null(u->invocation_id)) { |
604 | r = cg_set_xattr(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, | |
605 | "trusted.invocation_id", | |
606 | sd_id128_to_string(u->invocation_id, ids), 32, | |
607 | 0); | |
608 | if (r < 0) | |
609 | log_unit_debug_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", u->cgroup_path); | |
610 | } | |
0d2d6fbf | 611 | |
3288ea8f LP |
612 | if (unit_cgroup_delegate(u)) { |
613 | r = cg_set_xattr(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, | |
614 | "trusted.delegate", | |
615 | "1", 1, | |
616 | 0); | |
617 | if (r < 0) | |
618 | log_unit_debug_errno(u, r, "Failed to set delegate flag on control group %s, ignoring: %m", u->cgroup_path); | |
619 | } else { | |
620 | r = cg_remove_xattr(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "trusted.delegate"); | |
621 | if (r != -ENODATA) | |
622 | log_unit_debug_errno(u, r, "Failed to remove delegate flag on control group %s, ignoring: %m", u->cgroup_path); | |
623 | } | |
0d2d6fbf CD |
624 | } |
625 | ||
45c2e068 | 626 | static int lookup_block_device(const char *p, dev_t *ret) { |
f5855697 YS |
627 | dev_t rdev, dev = 0; |
628 | mode_t mode; | |
45c2e068 | 629 | int r; |
4ad49000 LP |
630 | |
631 | assert(p); | |
45c2e068 | 632 | assert(ret); |
4ad49000 | 633 | |
f5855697 | 634 | r = device_path_parse_major_minor(p, &mode, &rdev); |
d5aecba6 | 635 | if (r == -ENODEV) { /* not a parsable device node, need to go to disk */ |
f5855697 | 636 | struct stat st; |
57f1030b | 637 | |
d5aecba6 LP |
638 | if (stat(p, &st) < 0) |
639 | return log_warning_errno(errno, "Couldn't stat device '%s': %m", p); | |
57f1030b | 640 | |
f5855697 | 641 | mode = st.st_mode; |
a0d6590c LP |
642 | rdev = st.st_rdev; |
643 | dev = st.st_dev; | |
d5aecba6 LP |
644 | } else if (r < 0) |
645 | return log_warning_errno(r, "Failed to parse major/minor from path '%s': %m", p); | |
646 | ||
57f1030b LP |
647 | if (S_ISCHR(mode)) |
648 | return log_warning_errno(SYNTHETIC_ERRNO(ENOTBLK), | |
649 | "Device node '%s' is a character device, but block device needed.", p); | |
650 | if (S_ISBLK(mode)) | |
f5855697 YS |
651 | *ret = rdev; |
652 | else if (major(dev) != 0) | |
653 | *ret = dev; /* If this is not a device node then use the block device this file is stored on */ | |
45c2e068 LP |
654 | else { |
655 | /* If this is btrfs, getting the backing block device is a bit harder */ | |
656 | r = btrfs_get_block_device(p, ret); | |
57f1030b LP |
657 | if (r == -ENOTTY) |
658 | return log_warning_errno(SYNTHETIC_ERRNO(ENODEV), | |
659 | "'%s' is not a block device node, and file system block device cannot be determined or is not local.", p); | |
660 | if (r < 0) | |
45c2e068 | 661 | return log_warning_errno(r, "Failed to determine block device backing btrfs file system '%s': %m", p); |
4ad49000 | 662 | } |
8e274523 | 663 | |
b7cf4b4e BB |
664 | /* If this is a LUKS/DM device, recursively try to get the originating block device */ |
665 | while (block_get_originating(*ret, ret) > 0); | |
45c2e068 LP |
666 | |
667 | /* If this is a partition, try to get the originating block device */ | |
668 | (void) block_get_whole_disk(*ret, ret); | |
8e274523 | 669 | return 0; |
8e274523 LP |
670 | } |
671 | ||
66ebf6c0 TH |
672 | static bool cgroup_context_has_cpu_weight(CGroupContext *c) { |
673 | return c->cpu_weight != CGROUP_WEIGHT_INVALID || | |
674 | c->startup_cpu_weight != CGROUP_WEIGHT_INVALID; | |
675 | } | |
676 | ||
677 | static bool cgroup_context_has_cpu_shares(CGroupContext *c) { | |
678 | return c->cpu_shares != CGROUP_CPU_SHARES_INVALID || | |
679 | c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID; | |
680 | } | |
681 | ||
682 | static uint64_t cgroup_context_cpu_weight(CGroupContext *c, ManagerState state) { | |
683 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && | |
684 | c->startup_cpu_weight != CGROUP_WEIGHT_INVALID) | |
685 | return c->startup_cpu_weight; | |
686 | else if (c->cpu_weight != CGROUP_WEIGHT_INVALID) | |
687 | return c->cpu_weight; | |
688 | else | |
689 | return CGROUP_WEIGHT_DEFAULT; | |
690 | } | |
691 | ||
692 | static uint64_t cgroup_context_cpu_shares(CGroupContext *c, ManagerState state) { | |
693 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && | |
694 | c->startup_cpu_shares != CGROUP_CPU_SHARES_INVALID) | |
695 | return c->startup_cpu_shares; | |
696 | else if (c->cpu_shares != CGROUP_CPU_SHARES_INVALID) | |
697 | return c->cpu_shares; | |
698 | else | |
699 | return CGROUP_CPU_SHARES_DEFAULT; | |
700 | } | |
701 | ||
10f28641 FB |
702 | usec_t cgroup_cpu_adjust_period(usec_t period, usec_t quota, usec_t resolution, usec_t max_period) { |
703 | /* kernel uses a minimum resolution of 1ms, so both period and (quota * period) | |
704 | * need to be higher than that boundary. quota is specified in USecPerSec. | |
705 | * Additionally, period must be at most max_period. */ | |
706 | assert(quota > 0); | |
707 | ||
708 | return MIN(MAX3(period, resolution, resolution * USEC_PER_SEC / quota), max_period); | |
709 | } | |
710 | ||
711 | static usec_t cgroup_cpu_adjust_period_and_log(Unit *u, usec_t period, usec_t quota) { | |
712 | usec_t new_period; | |
713 | ||
714 | if (quota == USEC_INFINITY) | |
715 | /* Always use default period for infinity quota. */ | |
716 | return CGROUP_CPU_QUOTA_DEFAULT_PERIOD_USEC; | |
717 | ||
718 | if (period == USEC_INFINITY) | |
719 | /* Default period was requested. */ | |
720 | period = CGROUP_CPU_QUOTA_DEFAULT_PERIOD_USEC; | |
721 | ||
722 | /* Clamp to interval [1ms, 1s] */ | |
723 | new_period = cgroup_cpu_adjust_period(period, quota, USEC_PER_MSEC, USEC_PER_SEC); | |
724 | ||
725 | if (new_period != period) { | |
726 | char v[FORMAT_TIMESPAN_MAX]; | |
527ede0c | 727 | log_unit_full(u, u->warned_clamping_cpu_quota_period ? LOG_DEBUG : LOG_WARNING, 0, |
10f28641 FB |
728 | "Clamping CPU interval for cpu.max: period is now %s", |
729 | format_timespan(v, sizeof(v), new_period, 1)); | |
527ede0c | 730 | u->warned_clamping_cpu_quota_period = true; |
10f28641 FB |
731 | } |
732 | ||
733 | return new_period; | |
734 | } | |
735 | ||
52fecf20 LP |
736 | static void cgroup_apply_unified_cpu_weight(Unit *u, uint64_t weight) { |
737 | char buf[DECIMAL_STR_MAX(uint64_t) + 2]; | |
66ebf6c0 TH |
738 | |
739 | xsprintf(buf, "%" PRIu64 "\n", weight); | |
293d32df | 740 | (void) set_attribute_and_warn(u, "cpu", "cpu.weight", buf); |
52fecf20 LP |
741 | } |
742 | ||
10f28641 | 743 | static void cgroup_apply_unified_cpu_quota(Unit *u, usec_t quota, usec_t period) { |
52fecf20 | 744 | char buf[(DECIMAL_STR_MAX(usec_t) + 1) * 2 + 1]; |
66ebf6c0 | 745 | |
10f28641 | 746 | period = cgroup_cpu_adjust_period_and_log(u, period, quota); |
66ebf6c0 TH |
747 | if (quota != USEC_INFINITY) |
748 | xsprintf(buf, USEC_FMT " " USEC_FMT "\n", | |
10f28641 | 749 | MAX(quota * period / USEC_PER_SEC, USEC_PER_MSEC), period); |
66ebf6c0 | 750 | else |
10f28641 | 751 | xsprintf(buf, "max " USEC_FMT "\n", period); |
293d32df | 752 | (void) set_attribute_and_warn(u, "cpu", "cpu.max", buf); |
66ebf6c0 TH |
753 | } |
754 | ||
52fecf20 LP |
755 | static void cgroup_apply_legacy_cpu_shares(Unit *u, uint64_t shares) { |
756 | char buf[DECIMAL_STR_MAX(uint64_t) + 2]; | |
66ebf6c0 TH |
757 | |
758 | xsprintf(buf, "%" PRIu64 "\n", shares); | |
293d32df | 759 | (void) set_attribute_and_warn(u, "cpu", "cpu.shares", buf); |
52fecf20 LP |
760 | } |
761 | ||
10f28641 | 762 | static void cgroup_apply_legacy_cpu_quota(Unit *u, usec_t quota, usec_t period) { |
52fecf20 | 763 | char buf[DECIMAL_STR_MAX(usec_t) + 2]; |
66ebf6c0 | 764 | |
10f28641 FB |
765 | period = cgroup_cpu_adjust_period_and_log(u, period, quota); |
766 | ||
767 | xsprintf(buf, USEC_FMT "\n", period); | |
293d32df | 768 | (void) set_attribute_and_warn(u, "cpu", "cpu.cfs_period_us", buf); |
66ebf6c0 TH |
769 | |
770 | if (quota != USEC_INFINITY) { | |
10f28641 | 771 | xsprintf(buf, USEC_FMT "\n", MAX(quota * period / USEC_PER_SEC, USEC_PER_MSEC)); |
293d32df | 772 | (void) set_attribute_and_warn(u, "cpu", "cpu.cfs_quota_us", buf); |
66ebf6c0 | 773 | } else |
589a5f7a | 774 | (void) set_attribute_and_warn(u, "cpu", "cpu.cfs_quota_us", "-1\n"); |
66ebf6c0 TH |
775 | } |
776 | ||
777 | static uint64_t cgroup_cpu_shares_to_weight(uint64_t shares) { | |
778 | return CLAMP(shares * CGROUP_WEIGHT_DEFAULT / CGROUP_CPU_SHARES_DEFAULT, | |
779 | CGROUP_WEIGHT_MIN, CGROUP_WEIGHT_MAX); | |
780 | } | |
781 | ||
782 | static uint64_t cgroup_cpu_weight_to_shares(uint64_t weight) { | |
783 | return CLAMP(weight * CGROUP_CPU_SHARES_DEFAULT / CGROUP_WEIGHT_DEFAULT, | |
784 | CGROUP_CPU_SHARES_MIN, CGROUP_CPU_SHARES_MAX); | |
785 | } | |
786 | ||
2cea199e | 787 | static void cgroup_apply_unified_cpuset(Unit *u, const CPUSet *cpus, const char *name) { |
047f5d63 PH |
788 | _cleanup_free_ char *buf = NULL; |
789 | ||
2cea199e | 790 | buf = cpu_set_to_range_string(cpus); |
c259ac9a LP |
791 | if (!buf) { |
792 | log_oom(); | |
793 | return; | |
794 | } | |
047f5d63 PH |
795 | |
796 | (void) set_attribute_and_warn(u, "cpuset", name, buf); | |
797 | } | |
798 | ||
508c45da | 799 | static bool cgroup_context_has_io_config(CGroupContext *c) { |
538b4852 TH |
800 | return c->io_accounting || |
801 | c->io_weight != CGROUP_WEIGHT_INVALID || | |
802 | c->startup_io_weight != CGROUP_WEIGHT_INVALID || | |
803 | c->io_device_weights || | |
6ae4283c | 804 | c->io_device_latencies || |
538b4852 TH |
805 | c->io_device_limits; |
806 | } | |
807 | ||
508c45da | 808 | static bool cgroup_context_has_blockio_config(CGroupContext *c) { |
538b4852 TH |
809 | return c->blockio_accounting || |
810 | c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || | |
811 | c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID || | |
812 | c->blockio_device_weights || | |
813 | c->blockio_device_bandwidths; | |
814 | } | |
815 | ||
508c45da | 816 | static uint64_t cgroup_context_io_weight(CGroupContext *c, ManagerState state) { |
64faf04c TH |
817 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && |
818 | c->startup_io_weight != CGROUP_WEIGHT_INVALID) | |
819 | return c->startup_io_weight; | |
820 | else if (c->io_weight != CGROUP_WEIGHT_INVALID) | |
821 | return c->io_weight; | |
822 | else | |
823 | return CGROUP_WEIGHT_DEFAULT; | |
824 | } | |
825 | ||
508c45da | 826 | static uint64_t cgroup_context_blkio_weight(CGroupContext *c, ManagerState state) { |
64faf04c TH |
827 | if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) && |
828 | c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID) | |
829 | return c->startup_blockio_weight; | |
830 | else if (c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID) | |
831 | return c->blockio_weight; | |
832 | else | |
833 | return CGROUP_BLKIO_WEIGHT_DEFAULT; | |
834 | } | |
835 | ||
508c45da | 836 | static uint64_t cgroup_weight_blkio_to_io(uint64_t blkio_weight) { |
538b4852 TH |
837 | return CLAMP(blkio_weight * CGROUP_WEIGHT_DEFAULT / CGROUP_BLKIO_WEIGHT_DEFAULT, |
838 | CGROUP_WEIGHT_MIN, CGROUP_WEIGHT_MAX); | |
839 | } | |
840 | ||
508c45da | 841 | static uint64_t cgroup_weight_io_to_blkio(uint64_t io_weight) { |
538b4852 TH |
842 | return CLAMP(io_weight * CGROUP_BLKIO_WEIGHT_DEFAULT / CGROUP_WEIGHT_DEFAULT, |
843 | CGROUP_BLKIO_WEIGHT_MIN, CGROUP_BLKIO_WEIGHT_MAX); | |
844 | } | |
845 | ||
f29ff115 | 846 | static void cgroup_apply_io_device_weight(Unit *u, const char *dev_path, uint64_t io_weight) { |
64faf04c TH |
847 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
848 | dev_t dev; | |
849 | int r; | |
850 | ||
851 | r = lookup_block_device(dev_path, &dev); | |
852 | if (r < 0) | |
853 | return; | |
854 | ||
855 | xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), io_weight); | |
293d32df | 856 | (void) set_attribute_and_warn(u, "io", "io.weight", buf); |
64faf04c TH |
857 | } |
858 | ||
f29ff115 | 859 | static void cgroup_apply_blkio_device_weight(Unit *u, const char *dev_path, uint64_t blkio_weight) { |
64faf04c TH |
860 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
861 | dev_t dev; | |
862 | int r; | |
863 | ||
864 | r = lookup_block_device(dev_path, &dev); | |
865 | if (r < 0) | |
866 | return; | |
867 | ||
868 | xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), blkio_weight); | |
293d32df | 869 | (void) set_attribute_and_warn(u, "blkio", "blkio.weight_device", buf); |
64faf04c TH |
870 | } |
871 | ||
6ae4283c TH |
872 | static void cgroup_apply_io_device_latency(Unit *u, const char *dev_path, usec_t target) { |
873 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+7+DECIMAL_STR_MAX(uint64_t)+1]; | |
874 | dev_t dev; | |
875 | int r; | |
876 | ||
877 | r = lookup_block_device(dev_path, &dev); | |
878 | if (r < 0) | |
879 | return; | |
880 | ||
881 | if (target != USEC_INFINITY) | |
882 | xsprintf(buf, "%u:%u target=%" PRIu64 "\n", major(dev), minor(dev), target); | |
883 | else | |
884 | xsprintf(buf, "%u:%u target=max\n", major(dev), minor(dev)); | |
885 | ||
293d32df | 886 | (void) set_attribute_and_warn(u, "io", "io.latency", buf); |
6ae4283c TH |
887 | } |
888 | ||
17ae2780 | 889 | static void cgroup_apply_io_device_limit(Unit *u, const char *dev_path, uint64_t *limits) { |
64faf04c TH |
890 | char limit_bufs[_CGROUP_IO_LIMIT_TYPE_MAX][DECIMAL_STR_MAX(uint64_t)]; |
891 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+(6+DECIMAL_STR_MAX(uint64_t)+1)*4]; | |
892 | CGroupIOLimitType type; | |
893 | dev_t dev; | |
64faf04c TH |
894 | int r; |
895 | ||
896 | r = lookup_block_device(dev_path, &dev); | |
897 | if (r < 0) | |
17ae2780 | 898 | return; |
64faf04c | 899 | |
17ae2780 LP |
900 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) |
901 | if (limits[type] != cgroup_io_limit_defaults[type]) | |
64faf04c | 902 | xsprintf(limit_bufs[type], "%" PRIu64, limits[type]); |
17ae2780 | 903 | else |
64faf04c | 904 | xsprintf(limit_bufs[type], "%s", limits[type] == CGROUP_LIMIT_MAX ? "max" : "0"); |
64faf04c TH |
905 | |
906 | xsprintf(buf, "%u:%u rbps=%s wbps=%s riops=%s wiops=%s\n", major(dev), minor(dev), | |
907 | limit_bufs[CGROUP_IO_RBPS_MAX], limit_bufs[CGROUP_IO_WBPS_MAX], | |
908 | limit_bufs[CGROUP_IO_RIOPS_MAX], limit_bufs[CGROUP_IO_WIOPS_MAX]); | |
293d32df | 909 | (void) set_attribute_and_warn(u, "io", "io.max", buf); |
64faf04c TH |
910 | } |
911 | ||
17ae2780 | 912 | static void cgroup_apply_blkio_device_limit(Unit *u, const char *dev_path, uint64_t rbps, uint64_t wbps) { |
64faf04c TH |
913 | char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1]; |
914 | dev_t dev; | |
64faf04c TH |
915 | int r; |
916 | ||
917 | r = lookup_block_device(dev_path, &dev); | |
918 | if (r < 0) | |
17ae2780 | 919 | return; |
64faf04c | 920 | |
64faf04c | 921 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), rbps); |
293d32df | 922 | (void) set_attribute_and_warn(u, "blkio", "blkio.throttle.read_bps_device", buf); |
64faf04c | 923 | |
64faf04c | 924 | sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), wbps); |
293d32df | 925 | (void) set_attribute_and_warn(u, "blkio", "blkio.throttle.write_bps_device", buf); |
64faf04c TH |
926 | } |
927 | ||
c52db42b CD |
928 | static bool unit_has_unified_memory_config(Unit *u) { |
929 | CGroupContext *c; | |
930 | ||
931 | assert(u); | |
932 | ||
933 | c = unit_get_cgroup_context(u); | |
934 | assert(c); | |
935 | ||
7c9d2b79 | 936 | return unit_get_ancestor_memory_min(u) > 0 || unit_get_ancestor_memory_low(u) > 0 || |
c52db42b CD |
937 | c->memory_high != CGROUP_LIMIT_MAX || c->memory_max != CGROUP_LIMIT_MAX || |
938 | c->memory_swap_max != CGROUP_LIMIT_MAX; | |
da4d897e TH |
939 | } |
940 | ||
f29ff115 | 941 | static void cgroup_apply_unified_memory_limit(Unit *u, const char *file, uint64_t v) { |
589a5f7a | 942 | char buf[DECIMAL_STR_MAX(uint64_t) + 1] = "max\n"; |
da4d897e TH |
943 | |
944 | if (v != CGROUP_LIMIT_MAX) | |
945 | xsprintf(buf, "%" PRIu64 "\n", v); | |
946 | ||
293d32df | 947 | (void) set_attribute_and_warn(u, "memory", file, buf); |
da4d897e TH |
948 | } |
949 | ||
0f2d84d2 | 950 | static void cgroup_apply_firewall(Unit *u) { |
0f2d84d2 LP |
951 | assert(u); |
952 | ||
acf7f253 | 953 | /* Best-effort: let's apply IP firewalling and/or accounting if that's enabled */ |
906c06f6 | 954 | |
acf7f253 | 955 | if (bpf_firewall_compile(u) < 0) |
906c06f6 DM |
956 | return; |
957 | ||
fab34748 | 958 | (void) bpf_firewall_load_custom(u); |
906c06f6 | 959 | (void) bpf_firewall_install(u); |
906c06f6 DM |
960 | } |
961 | ||
8b139557 ZJS |
962 | static int cgroup_apply_devices(Unit *u) { |
963 | _cleanup_(bpf_program_unrefp) BPFProgram *prog = NULL; | |
964 | const char *path; | |
965 | CGroupContext *c; | |
966 | CGroupDeviceAllow *a; | |
45669ae2 | 967 | CGroupDevicePolicy policy; |
8b139557 ZJS |
968 | int r; |
969 | ||
970 | assert_se(c = unit_get_cgroup_context(u)); | |
971 | assert_se(path = u->cgroup_path); | |
972 | ||
45669ae2 ZJS |
973 | policy = c->device_policy; |
974 | ||
8b139557 | 975 | if (cg_all_unified() > 0) { |
45669ae2 | 976 | r = bpf_devices_cgroup_init(&prog, policy, c->device_allow); |
8b139557 ZJS |
977 | if (r < 0) |
978 | return log_unit_warning_errno(u, r, "Failed to initialize device control bpf program: %m"); | |
979 | ||
980 | } else { | |
981 | /* Changing the devices list of a populated cgroup might result in EINVAL, hence ignore | |
982 | * EINVAL here. */ | |
983 | ||
45669ae2 | 984 | if (c->device_allow || policy != CGROUP_DEVICE_POLICY_AUTO) |
8b139557 ZJS |
985 | r = cg_set_attribute("devices", path, "devices.deny", "a"); |
986 | else | |
987 | r = cg_set_attribute("devices", path, "devices.allow", "a"); | |
988 | if (r < 0) | |
989 | log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING, r, | |
990 | "Failed to reset devices.allow/devices.deny: %m"); | |
991 | } | |
992 | ||
6b000af4 | 993 | bool allow_list_static = policy == CGROUP_DEVICE_POLICY_CLOSED || |
45669ae2 | 994 | (policy == CGROUP_DEVICE_POLICY_AUTO && c->device_allow); |
6b000af4 LP |
995 | if (allow_list_static) |
996 | (void) bpf_devices_allow_list_static(prog, path); | |
8b139557 | 997 | |
6b000af4 | 998 | bool any = allow_list_static; |
8b139557 ZJS |
999 | LIST_FOREACH(device_allow, a, c->device_allow) { |
1000 | char acc[4], *val; | |
1001 | unsigned k = 0; | |
1002 | ||
1003 | if (a->r) | |
1004 | acc[k++] = 'r'; | |
1005 | if (a->w) | |
1006 | acc[k++] = 'w'; | |
1007 | if (a->m) | |
1008 | acc[k++] = 'm'; | |
8b139557 ZJS |
1009 | if (k == 0) |
1010 | continue; | |
8b139557 ZJS |
1011 | acc[k++] = 0; |
1012 | ||
1013 | if (path_startswith(a->path, "/dev/")) | |
6b000af4 | 1014 | r = bpf_devices_allow_list_device(prog, path, a->path, acc); |
8b139557 | 1015 | else if ((val = startswith(a->path, "block-"))) |
6b000af4 | 1016 | r = bpf_devices_allow_list_major(prog, path, val, 'b', acc); |
8b139557 | 1017 | else if ((val = startswith(a->path, "char-"))) |
6b000af4 | 1018 | r = bpf_devices_allow_list_major(prog, path, val, 'c', acc); |
45669ae2 | 1019 | else { |
8b139557 | 1020 | log_unit_debug(u, "Ignoring device '%s' while writing cgroup attribute.", a->path); |
45669ae2 ZJS |
1021 | continue; |
1022 | } | |
1023 | ||
1024 | if (r >= 0) | |
1025 | any = true; | |
1026 | } | |
1027 | ||
1028 | if (prog && !any) { | |
1029 | log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENODEV), "No devices matched by device filter."); | |
1030 | ||
1031 | /* The kernel verifier would reject a program we would build with the normal intro and outro | |
6b000af4 | 1032 | but no allow-listing rules (outro would contain an unreachable instruction for successful |
45669ae2 ZJS |
1033 | return). */ |
1034 | policy = CGROUP_DEVICE_POLICY_STRICT; | |
8b139557 ZJS |
1035 | } |
1036 | ||
45669ae2 | 1037 | r = bpf_devices_apply_policy(prog, policy, any, path, &u->bpf_device_control_installed); |
8b139557 ZJS |
1038 | if (r < 0) { |
1039 | static bool warned = false; | |
1040 | ||
1041 | log_full_errno(warned ? LOG_DEBUG : LOG_WARNING, r, | |
1042 | "Unit %s configures device ACL, but the local system doesn't seem to support the BPF-based device controller.\n" | |
1043 | "Proceeding WITHOUT applying ACL (all devices will be accessible)!\n" | |
1044 | "(This warning is only shown for the first loaded unit using device ACL.)", u->id); | |
1045 | ||
1046 | warned = true; | |
1047 | } | |
1048 | return r; | |
1049 | } | |
1050 | ||
906c06f6 DM |
1051 | static void cgroup_context_apply( |
1052 | Unit *u, | |
1053 | CGroupMask apply_mask, | |
906c06f6 DM |
1054 | ManagerState state) { |
1055 | ||
f29ff115 TH |
1056 | const char *path; |
1057 | CGroupContext *c; | |
52fecf20 | 1058 | bool is_host_root, is_local_root; |
4ad49000 LP |
1059 | int r; |
1060 | ||
f29ff115 TH |
1061 | assert(u); |
1062 | ||
906c06f6 | 1063 | /* Nothing to do? Exit early! */ |
17f14955 | 1064 | if (apply_mask == 0) |
4ad49000 | 1065 | return; |
8e274523 | 1066 | |
52fecf20 LP |
1067 | /* Some cgroup attributes are not supported on the host root cgroup, hence silently ignore them here. And other |
1068 | * attributes should only be managed for cgroups further down the tree. */ | |
1069 | is_local_root = unit_has_name(u, SPECIAL_ROOT_SLICE); | |
1070 | is_host_root = unit_has_host_root_cgroup(u); | |
f3725e64 LP |
1071 | |
1072 | assert_se(c = unit_get_cgroup_context(u)); | |
1073 | assert_se(path = u->cgroup_path); | |
1074 | ||
52fecf20 | 1075 | if (is_local_root) /* Make sure we don't try to display messages with an empty path. */ |
6da13913 | 1076 | path = "/"; |
01efdf13 | 1077 | |
be2c0327 LP |
1078 | /* We generally ignore errors caused by read-only mounted cgroup trees (assuming we are running in a container |
1079 | * then), and missing cgroups, i.e. EROFS and ENOENT. */ | |
714e2e1d | 1080 | |
be2c0327 LP |
1081 | /* In fully unified mode these attributes don't exist on the host cgroup root. On legacy the weights exist, but |
1082 | * setting the weight makes very little sense on the host root cgroup, as there are no other cgroups at this | |
1083 | * level. The quota exists there too, but any attempt to write to it is refused with EINVAL. Inside of | |
4e1dfa45 | 1084 | * containers we want to leave control of these to the container manager (and if cgroup v2 delegation is used |
be2c0327 LP |
1085 | * we couldn't even write to them if we wanted to). */ |
1086 | if ((apply_mask & CGROUP_MASK_CPU) && !is_local_root) { | |
8e274523 | 1087 | |
b4cccbc1 | 1088 | if (cg_all_unified() > 0) { |
be2c0327 | 1089 | uint64_t weight; |
b2f8b02e | 1090 | |
be2c0327 LP |
1091 | if (cgroup_context_has_cpu_weight(c)) |
1092 | weight = cgroup_context_cpu_weight(c, state); | |
1093 | else if (cgroup_context_has_cpu_shares(c)) { | |
1094 | uint64_t shares; | |
66ebf6c0 | 1095 | |
be2c0327 LP |
1096 | shares = cgroup_context_cpu_shares(c, state); |
1097 | weight = cgroup_cpu_shares_to_weight(shares); | |
66ebf6c0 | 1098 | |
be2c0327 LP |
1099 | log_cgroup_compat(u, "Applying [Startup]CPUShares=%" PRIu64 " as [Startup]CPUWeight=%" PRIu64 " on %s", |
1100 | shares, weight, path); | |
1101 | } else | |
1102 | weight = CGROUP_WEIGHT_DEFAULT; | |
66ebf6c0 | 1103 | |
be2c0327 | 1104 | cgroup_apply_unified_cpu_weight(u, weight); |
10f28641 | 1105 | cgroup_apply_unified_cpu_quota(u, c->cpu_quota_per_sec_usec, c->cpu_quota_period_usec); |
66ebf6c0 | 1106 | |
52fecf20 | 1107 | } else { |
be2c0327 | 1108 | uint64_t shares; |
52fecf20 | 1109 | |
be2c0327 LP |
1110 | if (cgroup_context_has_cpu_weight(c)) { |
1111 | uint64_t weight; | |
52fecf20 | 1112 | |
be2c0327 LP |
1113 | weight = cgroup_context_cpu_weight(c, state); |
1114 | shares = cgroup_cpu_weight_to_shares(weight); | |
52fecf20 | 1115 | |
be2c0327 LP |
1116 | log_cgroup_compat(u, "Applying [Startup]CPUWeight=%" PRIu64 " as [Startup]CPUShares=%" PRIu64 " on %s", |
1117 | weight, shares, path); | |
1118 | } else if (cgroup_context_has_cpu_shares(c)) | |
1119 | shares = cgroup_context_cpu_shares(c, state); | |
1120 | else | |
1121 | shares = CGROUP_CPU_SHARES_DEFAULT; | |
66ebf6c0 | 1122 | |
be2c0327 | 1123 | cgroup_apply_legacy_cpu_shares(u, shares); |
10f28641 | 1124 | cgroup_apply_legacy_cpu_quota(u, c->cpu_quota_per_sec_usec, c->cpu_quota_period_usec); |
66ebf6c0 | 1125 | } |
4ad49000 LP |
1126 | } |
1127 | ||
047f5d63 | 1128 | if ((apply_mask & CGROUP_MASK_CPUSET) && !is_local_root) { |
2cea199e ZJS |
1129 | cgroup_apply_unified_cpuset(u, &c->cpuset_cpus, "cpuset.cpus"); |
1130 | cgroup_apply_unified_cpuset(u, &c->cpuset_mems, "cpuset.mems"); | |
047f5d63 PH |
1131 | } |
1132 | ||
4e1dfa45 | 1133 | /* The 'io' controller attributes are not exported on the host's root cgroup (being a pure cgroup v2 |
52fecf20 LP |
1134 | * controller), and in case of containers we want to leave control of these attributes to the container manager |
1135 | * (and we couldn't access that stuff anyway, even if we tried if proper delegation is used). */ | |
1136 | if ((apply_mask & CGROUP_MASK_IO) && !is_local_root) { | |
1137 | char buf[8+DECIMAL_STR_MAX(uint64_t)+1]; | |
1138 | bool has_io, has_blockio; | |
1139 | uint64_t weight; | |
13c31542 | 1140 | |
52fecf20 LP |
1141 | has_io = cgroup_context_has_io_config(c); |
1142 | has_blockio = cgroup_context_has_blockio_config(c); | |
13c31542 | 1143 | |
52fecf20 LP |
1144 | if (has_io) |
1145 | weight = cgroup_context_io_weight(c, state); | |
1146 | else if (has_blockio) { | |
1147 | uint64_t blkio_weight; | |
128fadc9 | 1148 | |
52fecf20 LP |
1149 | blkio_weight = cgroup_context_blkio_weight(c, state); |
1150 | weight = cgroup_weight_blkio_to_io(blkio_weight); | |
128fadc9 | 1151 | |
67e2ea15 | 1152 | log_cgroup_compat(u, "Applying [Startup]BlockIOWeight=%" PRIu64 " as [Startup]IOWeight=%" PRIu64, |
52fecf20 LP |
1153 | blkio_weight, weight); |
1154 | } else | |
1155 | weight = CGROUP_WEIGHT_DEFAULT; | |
13c31542 | 1156 | |
52fecf20 LP |
1157 | xsprintf(buf, "default %" PRIu64 "\n", weight); |
1158 | (void) set_attribute_and_warn(u, "io", "io.weight", buf); | |
538b4852 | 1159 | |
2dbc45ae KK |
1160 | /* FIXME: drop this when distro kernels properly support BFQ through "io.weight" |
1161 | * See also: https://github.com/systemd/systemd/pull/13335 */ | |
1162 | xsprintf(buf, "%" PRIu64 "\n", weight); | |
1163 | (void) set_attribute_and_warn(u, "io", "io.bfq.weight", buf); | |
1164 | ||
52fecf20 LP |
1165 | if (has_io) { |
1166 | CGroupIODeviceLatency *latency; | |
1167 | CGroupIODeviceLimit *limit; | |
1168 | CGroupIODeviceWeight *w; | |
128fadc9 | 1169 | |
52fecf20 LP |
1170 | LIST_FOREACH(device_weights, w, c->io_device_weights) |
1171 | cgroup_apply_io_device_weight(u, w->path, w->weight); | |
128fadc9 | 1172 | |
52fecf20 LP |
1173 | LIST_FOREACH(device_limits, limit, c->io_device_limits) |
1174 | cgroup_apply_io_device_limit(u, limit->path, limit->limits); | |
6ae4283c | 1175 | |
52fecf20 LP |
1176 | LIST_FOREACH(device_latencies, latency, c->io_device_latencies) |
1177 | cgroup_apply_io_device_latency(u, latency->path, latency->target_usec); | |
6ae4283c | 1178 | |
52fecf20 LP |
1179 | } else if (has_blockio) { |
1180 | CGroupBlockIODeviceWeight *w; | |
1181 | CGroupBlockIODeviceBandwidth *b; | |
13c31542 | 1182 | |
52fecf20 LP |
1183 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) { |
1184 | weight = cgroup_weight_blkio_to_io(w->weight); | |
17ae2780 | 1185 | |
67e2ea15 | 1186 | log_cgroup_compat(u, "Applying BlockIODeviceWeight=%" PRIu64 " as IODeviceWeight=%" PRIu64 " for %s", |
52fecf20 | 1187 | w->weight, weight, w->path); |
538b4852 | 1188 | |
52fecf20 LP |
1189 | cgroup_apply_io_device_weight(u, w->path, weight); |
1190 | } | |
538b4852 | 1191 | |
17ae2780 | 1192 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) { |
538b4852 TH |
1193 | uint64_t limits[_CGROUP_IO_LIMIT_TYPE_MAX]; |
1194 | CGroupIOLimitType type; | |
1195 | ||
1196 | for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) | |
1197 | limits[type] = cgroup_io_limit_defaults[type]; | |
1198 | ||
1199 | limits[CGROUP_IO_RBPS_MAX] = b->rbps; | |
1200 | limits[CGROUP_IO_WBPS_MAX] = b->wbps; | |
1201 | ||
67e2ea15 | 1202 | log_cgroup_compat(u, "Applying BlockIO{Read|Write}Bandwidth=%" PRIu64 " %" PRIu64 " as IO{Read|Write}BandwidthMax= for %s", |
128fadc9 TH |
1203 | b->rbps, b->wbps, b->path); |
1204 | ||
17ae2780 | 1205 | cgroup_apply_io_device_limit(u, b->path, limits); |
538b4852 | 1206 | } |
13c31542 TH |
1207 | } |
1208 | } | |
1209 | ||
906c06f6 | 1210 | if (apply_mask & CGROUP_MASK_BLKIO) { |
52fecf20 | 1211 | bool has_io, has_blockio; |
4ad49000 | 1212 | |
52fecf20 LP |
1213 | has_io = cgroup_context_has_io_config(c); |
1214 | has_blockio = cgroup_context_has_blockio_config(c); | |
1215 | ||
1216 | /* Applying a 'weight' never makes sense for the host root cgroup, and for containers this should be | |
1217 | * left to our container manager, too. */ | |
1218 | if (!is_local_root) { | |
64faf04c TH |
1219 | char buf[DECIMAL_STR_MAX(uint64_t)+1]; |
1220 | uint64_t weight; | |
64faf04c | 1221 | |
7d862ab8 | 1222 | if (has_io) { |
52fecf20 | 1223 | uint64_t io_weight; |
128fadc9 | 1224 | |
52fecf20 | 1225 | io_weight = cgroup_context_io_weight(c, state); |
538b4852 | 1226 | weight = cgroup_weight_io_to_blkio(cgroup_context_io_weight(c, state)); |
128fadc9 | 1227 | |
67e2ea15 | 1228 | log_cgroup_compat(u, "Applying [Startup]IOWeight=%" PRIu64 " as [Startup]BlockIOWeight=%" PRIu64, |
128fadc9 | 1229 | io_weight, weight); |
7d862ab8 TH |
1230 | } else if (has_blockio) |
1231 | weight = cgroup_context_blkio_weight(c, state); | |
1232 | else | |
538b4852 | 1233 | weight = CGROUP_BLKIO_WEIGHT_DEFAULT; |
64faf04c TH |
1234 | |
1235 | xsprintf(buf, "%" PRIu64 "\n", weight); | |
293d32df | 1236 | (void) set_attribute_and_warn(u, "blkio", "blkio.weight", buf); |
4ad49000 | 1237 | |
7d862ab8 | 1238 | if (has_io) { |
538b4852 TH |
1239 | CGroupIODeviceWeight *w; |
1240 | ||
128fadc9 TH |
1241 | LIST_FOREACH(device_weights, w, c->io_device_weights) { |
1242 | weight = cgroup_weight_io_to_blkio(w->weight); | |
1243 | ||
67e2ea15 | 1244 | log_cgroup_compat(u, "Applying IODeviceWeight=%" PRIu64 " as BlockIODeviceWeight=%" PRIu64 " for %s", |
128fadc9 TH |
1245 | w->weight, weight, w->path); |
1246 | ||
1247 | cgroup_apply_blkio_device_weight(u, w->path, weight); | |
1248 | } | |
7d862ab8 TH |
1249 | } else if (has_blockio) { |
1250 | CGroupBlockIODeviceWeight *w; | |
1251 | ||
7d862ab8 TH |
1252 | LIST_FOREACH(device_weights, w, c->blockio_device_weights) |
1253 | cgroup_apply_blkio_device_weight(u, w->path, w->weight); | |
538b4852 | 1254 | } |
4ad49000 LP |
1255 | } |
1256 | ||
5238e957 | 1257 | /* The bandwidth limits are something that make sense to be applied to the host's root but not container |
52fecf20 LP |
1258 | * roots, as there we want the container manager to handle it */ |
1259 | if (is_host_root || !is_local_root) { | |
1260 | if (has_io) { | |
1261 | CGroupIODeviceLimit *l; | |
538b4852 | 1262 | |
52fecf20 | 1263 | LIST_FOREACH(device_limits, l, c->io_device_limits) { |
67e2ea15 | 1264 | log_cgroup_compat(u, "Applying IO{Read|Write}Bandwidth=%" PRIu64 " %" PRIu64 " as BlockIO{Read|Write}BandwidthMax= for %s", |
52fecf20 | 1265 | l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX], l->path); |
128fadc9 | 1266 | |
52fecf20 LP |
1267 | cgroup_apply_blkio_device_limit(u, l->path, l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX]); |
1268 | } | |
1269 | } else if (has_blockio) { | |
1270 | CGroupBlockIODeviceBandwidth *b; | |
7d862ab8 | 1271 | |
52fecf20 LP |
1272 | LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) |
1273 | cgroup_apply_blkio_device_limit(u, b->path, b->rbps, b->wbps); | |
1274 | } | |
d686d8a9 | 1275 | } |
8e274523 LP |
1276 | } |
1277 | ||
be2c0327 LP |
1278 | /* In unified mode 'memory' attributes do not exist on the root cgroup. In legacy mode 'memory.limit_in_bytes' |
1279 | * exists on the root cgroup, but any writes to it are refused with EINVAL. And if we run in a container we | |
4e1dfa45 | 1280 | * want to leave control to the container manager (and if proper cgroup v2 delegation is used we couldn't even |
be2c0327 LP |
1281 | * write to this if we wanted to.) */ |
1282 | if ((apply_mask & CGROUP_MASK_MEMORY) && !is_local_root) { | |
efdb0237 | 1283 | |
52fecf20 | 1284 | if (cg_all_unified() > 0) { |
be2c0327 LP |
1285 | uint64_t max, swap_max = CGROUP_LIMIT_MAX; |
1286 | ||
c52db42b | 1287 | if (unit_has_unified_memory_config(u)) { |
be2c0327 LP |
1288 | max = c->memory_max; |
1289 | swap_max = c->memory_swap_max; | |
1290 | } else { | |
1291 | max = c->memory_limit; | |
efdb0237 | 1292 | |
be2c0327 LP |
1293 | if (max != CGROUP_LIMIT_MAX) |
1294 | log_cgroup_compat(u, "Applying MemoryLimit=%" PRIu64 " as MemoryMax=", max); | |
128fadc9 | 1295 | } |
da4d897e | 1296 | |
64fe532e | 1297 | cgroup_apply_unified_memory_limit(u, "memory.min", unit_get_ancestor_memory_min(u)); |
c52db42b | 1298 | cgroup_apply_unified_memory_limit(u, "memory.low", unit_get_ancestor_memory_low(u)); |
be2c0327 LP |
1299 | cgroup_apply_unified_memory_limit(u, "memory.high", c->memory_high); |
1300 | cgroup_apply_unified_memory_limit(u, "memory.max", max); | |
1301 | cgroup_apply_unified_memory_limit(u, "memory.swap.max", swap_max); | |
128fadc9 | 1302 | |
afcfaa69 LP |
1303 | (void) set_attribute_and_warn(u, "memory", "memory.oom.group", one_zero(c->memory_oom_group)); |
1304 | ||
be2c0327 LP |
1305 | } else { |
1306 | char buf[DECIMAL_STR_MAX(uint64_t) + 1]; | |
1307 | uint64_t val; | |
52fecf20 | 1308 | |
c52db42b | 1309 | if (unit_has_unified_memory_config(u)) { |
be2c0327 LP |
1310 | val = c->memory_max; |
1311 | log_cgroup_compat(u, "Applying MemoryMax=%" PRIi64 " as MemoryLimit=", val); | |
1312 | } else | |
1313 | val = c->memory_limit; | |
78a4ee59 | 1314 | |
be2c0327 LP |
1315 | if (val == CGROUP_LIMIT_MAX) |
1316 | strncpy(buf, "-1\n", sizeof(buf)); | |
1317 | else | |
1318 | xsprintf(buf, "%" PRIu64 "\n", val); | |
1319 | ||
1320 | (void) set_attribute_and_warn(u, "memory", "memory.limit_in_bytes", buf); | |
da4d897e | 1321 | } |
4ad49000 | 1322 | } |
8e274523 | 1323 | |
4e1dfa45 | 1324 | /* On cgroup v2 we can apply BPF everywhere. On cgroup v1 we apply it everywhere except for the root of |
52fecf20 LP |
1325 | * containers, where we leave this to the manager */ |
1326 | if ((apply_mask & (CGROUP_MASK_DEVICES | CGROUP_MASK_BPF_DEVICES)) && | |
8b139557 ZJS |
1327 | (is_host_root || cg_all_unified() > 0 || !is_local_root)) |
1328 | (void) cgroup_apply_devices(u); | |
03a7b521 | 1329 | |
00b5974f LP |
1330 | if (apply_mask & CGROUP_MASK_PIDS) { |
1331 | ||
52fecf20 | 1332 | if (is_host_root) { |
00b5974f LP |
1333 | /* So, the "pids" controller does not expose anything on the root cgroup, in order not to |
1334 | * replicate knobs exposed elsewhere needlessly. We abstract this away here however, and when | |
1335 | * the knobs of the root cgroup are modified propagate this to the relevant sysctls. There's a | |
1336 | * non-obvious asymmetry however: unlike the cgroup properties we don't really want to take | |
1337 | * exclusive ownership of the sysctls, but we still want to honour things if the user sets | |
1338 | * limits. Hence we employ sort of a one-way strategy: when the user sets a bounded limit | |
1339 | * through us it counts. When the user afterwards unsets it again (i.e. sets it to unbounded) | |
1340 | * it also counts. But if the user never set a limit through us (i.e. we are the default of | |
1341 | * "unbounded") we leave things unmodified. For this we manage a global boolean that we turn on | |
1342 | * the first time we set a limit. Note that this boolean is flushed out on manager reload, | |
5238e957 | 1343 | * which is desirable so that there's an official way to release control of the sysctl from |
00b5974f LP |
1344 | * systemd: set the limit to unbounded and reload. */ |
1345 | ||
3a0f06c4 | 1346 | if (tasks_max_isset(&c->tasks_max)) { |
00b5974f | 1347 | u->manager->sysctl_pid_max_changed = true; |
3a0f06c4 | 1348 | r = procfs_tasks_set_limit(tasks_max_resolve(&c->tasks_max)); |
00b5974f LP |
1349 | } else if (u->manager->sysctl_pid_max_changed) |
1350 | r = procfs_tasks_set_limit(TASKS_MAX); | |
1351 | else | |
1352 | r = 0; | |
00b5974f | 1353 | if (r < 0) |
39b9fefb | 1354 | log_unit_full(u, LOG_LEVEL_CGROUP_WRITE(r), r, |
00b5974f | 1355 | "Failed to write to tasks limit sysctls: %m"); |
52fecf20 | 1356 | } |
03a7b521 | 1357 | |
52fecf20 LP |
1358 | /* The attribute itself is not available on the host root cgroup, and in the container case we want to |
1359 | * leave it for the container manager. */ | |
1360 | if (!is_local_root) { | |
3a0f06c4 ZJS |
1361 | if (tasks_max_isset(&c->tasks_max)) { |
1362 | char buf[DECIMAL_STR_MAX(uint64_t) + 1]; | |
03a7b521 | 1363 | |
3a0f06c4 | 1364 | xsprintf(buf, "%" PRIu64 "\n", tasks_max_resolve(&c->tasks_max)); |
293d32df | 1365 | (void) set_attribute_and_warn(u, "pids", "pids.max", buf); |
00b5974f | 1366 | } else |
589a5f7a | 1367 | (void) set_attribute_and_warn(u, "pids", "pids.max", "max\n"); |
00b5974f | 1368 | } |
03a7b521 | 1369 | } |
906c06f6 | 1370 | |
17f14955 | 1371 | if (apply_mask & CGROUP_MASK_BPF_FIREWALL) |
0f2d84d2 | 1372 | cgroup_apply_firewall(u); |
fb385181 LP |
1373 | } |
1374 | ||
16492445 LP |
1375 | static bool unit_get_needs_bpf_firewall(Unit *u) { |
1376 | CGroupContext *c; | |
1377 | Unit *p; | |
1378 | assert(u); | |
1379 | ||
1380 | c = unit_get_cgroup_context(u); | |
1381 | if (!c) | |
1382 | return false; | |
1383 | ||
1384 | if (c->ip_accounting || | |
1385 | c->ip_address_allow || | |
fab34748 KL |
1386 | c->ip_address_deny || |
1387 | c->ip_filters_ingress || | |
1388 | c->ip_filters_egress) | |
16492445 LP |
1389 | return true; |
1390 | ||
1391 | /* If any parent slice has an IP access list defined, it applies too */ | |
1392 | for (p = UNIT_DEREF(u->slice); p; p = UNIT_DEREF(p->slice)) { | |
1393 | c = unit_get_cgroup_context(p); | |
1394 | if (!c) | |
1395 | return false; | |
1396 | ||
1397 | if (c->ip_address_allow || | |
1398 | c->ip_address_deny) | |
1399 | return true; | |
1400 | } | |
1401 | ||
1402 | return false; | |
1403 | } | |
1404 | ||
c52db42b | 1405 | static CGroupMask unit_get_cgroup_mask(Unit *u) { |
efdb0237 | 1406 | CGroupMask mask = 0; |
c52db42b CD |
1407 | CGroupContext *c; |
1408 | ||
1409 | assert(u); | |
1410 | ||
1411 | c = unit_get_cgroup_context(u); | |
8e274523 | 1412 | |
c710d3b4 CD |
1413 | assert(c); |
1414 | ||
fae9bc29 | 1415 | /* Figure out which controllers we need, based on the cgroup context object */ |
8e274523 | 1416 | |
fae9bc29 | 1417 | if (c->cpu_accounting) |
f98c2585 | 1418 | mask |= get_cpu_accounting_mask(); |
fae9bc29 LP |
1419 | |
1420 | if (cgroup_context_has_cpu_weight(c) || | |
66ebf6c0 | 1421 | cgroup_context_has_cpu_shares(c) || |
3a43da28 | 1422 | c->cpu_quota_per_sec_usec != USEC_INFINITY) |
fae9bc29 | 1423 | mask |= CGROUP_MASK_CPU; |
ecedd90f | 1424 | |
047f5d63 PH |
1425 | if (c->cpuset_cpus.set || c->cpuset_mems.set) |
1426 | mask |= CGROUP_MASK_CPUSET; | |
1427 | ||
538b4852 TH |
1428 | if (cgroup_context_has_io_config(c) || cgroup_context_has_blockio_config(c)) |
1429 | mask |= CGROUP_MASK_IO | CGROUP_MASK_BLKIO; | |
ecedd90f | 1430 | |
4ad49000 | 1431 | if (c->memory_accounting || |
da4d897e | 1432 | c->memory_limit != CGROUP_LIMIT_MAX || |
c52db42b | 1433 | unit_has_unified_memory_config(u)) |
efdb0237 | 1434 | mask |= CGROUP_MASK_MEMORY; |
8e274523 | 1435 | |
a931ad47 | 1436 | if (c->device_allow || |
084870f9 | 1437 | c->device_policy != CGROUP_DEVICE_POLICY_AUTO) |
084c7007 | 1438 | mask |= CGROUP_MASK_DEVICES | CGROUP_MASK_BPF_DEVICES; |
4ad49000 | 1439 | |
03a7b521 | 1440 | if (c->tasks_accounting || |
3a0f06c4 | 1441 | tasks_max_isset(&c->tasks_max)) |
03a7b521 LP |
1442 | mask |= CGROUP_MASK_PIDS; |
1443 | ||
fae9bc29 | 1444 | return CGROUP_MASK_EXTEND_JOINED(mask); |
8e274523 LP |
1445 | } |
1446 | ||
53aea74a | 1447 | static CGroupMask unit_get_bpf_mask(Unit *u) { |
17f14955 RG |
1448 | CGroupMask mask = 0; |
1449 | ||
fae9bc29 LP |
1450 | /* Figure out which controllers we need, based on the cgroup context, possibly taking into account children |
1451 | * too. */ | |
1452 | ||
17f14955 RG |
1453 | if (unit_get_needs_bpf_firewall(u)) |
1454 | mask |= CGROUP_MASK_BPF_FIREWALL; | |
1455 | ||
1456 | return mask; | |
1457 | } | |
1458 | ||
efdb0237 | 1459 | CGroupMask unit_get_own_mask(Unit *u) { |
4ad49000 | 1460 | CGroupContext *c; |
8e274523 | 1461 | |
442ce775 LP |
1462 | /* Returns the mask of controllers the unit needs for itself. If a unit is not properly loaded, return an empty |
1463 | * mask, as we shouldn't reflect it in the cgroup hierarchy then. */ | |
1464 | ||
1465 | if (u->load_state != UNIT_LOADED) | |
1466 | return 0; | |
efdb0237 | 1467 | |
4ad49000 LP |
1468 | c = unit_get_cgroup_context(u); |
1469 | if (!c) | |
1470 | return 0; | |
8e274523 | 1471 | |
c52db42b | 1472 | return (unit_get_cgroup_mask(u) | unit_get_bpf_mask(u) | unit_get_delegate_mask(u)) & ~unit_get_ancestor_disable_mask(u); |
02638280 LP |
1473 | } |
1474 | ||
1475 | CGroupMask unit_get_delegate_mask(Unit *u) { | |
1476 | CGroupContext *c; | |
1477 | ||
1478 | /* If delegation is turned on, then turn on selected controllers, unless we are on the legacy hierarchy and the | |
1479 | * process we fork into is known to drop privileges, and hence shouldn't get access to the controllers. | |
19af675e | 1480 | * |
02638280 | 1481 | * Note that on the unified hierarchy it is safe to delegate controllers to unprivileged services. */ |
a931ad47 | 1482 | |
1d9cc876 | 1483 | if (!unit_cgroup_delegate(u)) |
02638280 LP |
1484 | return 0; |
1485 | ||
1486 | if (cg_all_unified() <= 0) { | |
a931ad47 LP |
1487 | ExecContext *e; |
1488 | ||
1489 | e = unit_get_exec_context(u); | |
02638280 LP |
1490 | if (e && !exec_context_maintains_privileges(e)) |
1491 | return 0; | |
a931ad47 LP |
1492 | } |
1493 | ||
1d9cc876 | 1494 | assert_se(c = unit_get_cgroup_context(u)); |
fae9bc29 | 1495 | return CGROUP_MASK_EXTEND_JOINED(c->delegate_controllers); |
8e274523 LP |
1496 | } |
1497 | ||
efdb0237 | 1498 | CGroupMask unit_get_members_mask(Unit *u) { |
4ad49000 | 1499 | assert(u); |
bc432dc7 | 1500 | |
02638280 | 1501 | /* Returns the mask of controllers all of the unit's children require, merged */ |
efdb0237 | 1502 | |
bc432dc7 | 1503 | if (u->cgroup_members_mask_valid) |
26a17ca2 | 1504 | return u->cgroup_members_mask; /* Use cached value if possible */ |
bc432dc7 | 1505 | |
64e844e5 | 1506 | u->cgroup_members_mask = 0; |
bc432dc7 LP |
1507 | |
1508 | if (u->type == UNIT_SLICE) { | |
eef85c4a | 1509 | void *v; |
bc432dc7 LP |
1510 | Unit *member; |
1511 | Iterator i; | |
1512 | ||
95ae4d14 | 1513 | HASHMAP_FOREACH_KEY(v, member, u->dependencies[UNIT_BEFORE], i) |
cb5e3bc3 CD |
1514 | if (UNIT_DEREF(member->slice) == u) |
1515 | u->cgroup_members_mask |= unit_get_subtree_mask(member); /* note that this calls ourselves again, for the children */ | |
bc432dc7 LP |
1516 | } |
1517 | ||
1518 | u->cgroup_members_mask_valid = true; | |
6414b7c9 | 1519 | return u->cgroup_members_mask; |
246aa6dd LP |
1520 | } |
1521 | ||
efdb0237 | 1522 | CGroupMask unit_get_siblings_mask(Unit *u) { |
4ad49000 | 1523 | assert(u); |
246aa6dd | 1524 | |
efdb0237 LP |
1525 | /* Returns the mask of controllers all of the unit's siblings |
1526 | * require, i.e. the members mask of the unit's parent slice | |
1527 | * if there is one. */ | |
1528 | ||
bc432dc7 | 1529 | if (UNIT_ISSET(u->slice)) |
637f421e | 1530 | return unit_get_members_mask(UNIT_DEREF(u->slice)); |
4ad49000 | 1531 | |
64e844e5 | 1532 | return unit_get_subtree_mask(u); /* we are the top-level slice */ |
246aa6dd LP |
1533 | } |
1534 | ||
4f6f62e4 CD |
1535 | CGroupMask unit_get_disable_mask(Unit *u) { |
1536 | CGroupContext *c; | |
1537 | ||
1538 | c = unit_get_cgroup_context(u); | |
1539 | if (!c) | |
1540 | return 0; | |
1541 | ||
1542 | return c->disable_controllers; | |
1543 | } | |
1544 | ||
1545 | CGroupMask unit_get_ancestor_disable_mask(Unit *u) { | |
1546 | CGroupMask mask; | |
1547 | ||
1548 | assert(u); | |
1549 | mask = unit_get_disable_mask(u); | |
1550 | ||
1551 | /* Returns the mask of controllers which are marked as forcibly | |
1552 | * disabled in any ancestor unit or the unit in question. */ | |
1553 | ||
1554 | if (UNIT_ISSET(u->slice)) | |
1555 | mask |= unit_get_ancestor_disable_mask(UNIT_DEREF(u->slice)); | |
1556 | ||
1557 | return mask; | |
1558 | } | |
1559 | ||
efdb0237 LP |
1560 | CGroupMask unit_get_subtree_mask(Unit *u) { |
1561 | ||
1562 | /* Returns the mask of this subtree, meaning of the group | |
1563 | * itself and its children. */ | |
1564 | ||
1565 | return unit_get_own_mask(u) | unit_get_members_mask(u); | |
1566 | } | |
1567 | ||
1568 | CGroupMask unit_get_target_mask(Unit *u) { | |
1569 | CGroupMask mask; | |
1570 | ||
1571 | /* This returns the cgroup mask of all controllers to enable | |
1572 | * for a specific cgroup, i.e. everything it needs itself, | |
1573 | * plus all that its children need, plus all that its siblings | |
1574 | * need. This is primarily useful on the legacy cgroup | |
1575 | * hierarchy, where we need to duplicate each cgroup in each | |
1576 | * hierarchy that shall be enabled for it. */ | |
6414b7c9 | 1577 | |
efdb0237 | 1578 | mask = unit_get_own_mask(u) | unit_get_members_mask(u) | unit_get_siblings_mask(u); |
84d2744b ZJS |
1579 | |
1580 | if (mask & CGROUP_MASK_BPF_FIREWALL & ~u->manager->cgroup_supported) | |
1581 | emit_bpf_firewall_warning(u); | |
1582 | ||
efdb0237 | 1583 | mask &= u->manager->cgroup_supported; |
c72703e2 | 1584 | mask &= ~unit_get_ancestor_disable_mask(u); |
efdb0237 LP |
1585 | |
1586 | return mask; | |
1587 | } | |
1588 | ||
1589 | CGroupMask unit_get_enable_mask(Unit *u) { | |
1590 | CGroupMask mask; | |
1591 | ||
1592 | /* This returns the cgroup mask of all controllers to enable | |
1593 | * for the children of a specific cgroup. This is primarily | |
1594 | * useful for the unified cgroup hierarchy, where each cgroup | |
1595 | * controls which controllers are enabled for its children. */ | |
1596 | ||
1597 | mask = unit_get_members_mask(u); | |
6414b7c9 | 1598 | mask &= u->manager->cgroup_supported; |
c72703e2 | 1599 | mask &= ~unit_get_ancestor_disable_mask(u); |
6414b7c9 DS |
1600 | |
1601 | return mask; | |
1602 | } | |
1603 | ||
5af88058 | 1604 | void unit_invalidate_cgroup_members_masks(Unit *u) { |
bc432dc7 LP |
1605 | assert(u); |
1606 | ||
5af88058 LP |
1607 | /* Recurse invalidate the member masks cache all the way up the tree */ |
1608 | u->cgroup_members_mask_valid = false; | |
bc432dc7 | 1609 | |
5af88058 LP |
1610 | if (UNIT_ISSET(u->slice)) |
1611 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
6414b7c9 DS |
1612 | } |
1613 | ||
6592b975 | 1614 | const char *unit_get_realized_cgroup_path(Unit *u, CGroupMask mask) { |
03b90d4b | 1615 | |
6592b975 | 1616 | /* Returns the realized cgroup path of the specified unit where all specified controllers are available. */ |
03b90d4b LP |
1617 | |
1618 | while (u) { | |
6592b975 | 1619 | |
03b90d4b LP |
1620 | if (u->cgroup_path && |
1621 | u->cgroup_realized && | |
d94a24ca | 1622 | FLAGS_SET(u->cgroup_realized_mask, mask)) |
03b90d4b LP |
1623 | return u->cgroup_path; |
1624 | ||
1625 | u = UNIT_DEREF(u->slice); | |
1626 | } | |
1627 | ||
1628 | return NULL; | |
1629 | } | |
1630 | ||
6592b975 LP |
1631 | static const char *migrate_callback(CGroupMask mask, void *userdata) { |
1632 | return unit_get_realized_cgroup_path(userdata, mask); | |
1633 | } | |
1634 | ||
303ee601 | 1635 | char *unit_default_cgroup_path(const Unit *u) { |
efdb0237 LP |
1636 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
1637 | int r; | |
1638 | ||
1639 | assert(u); | |
1640 | ||
1641 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) | |
1642 | return strdup(u->manager->cgroup_root); | |
1643 | ||
1644 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
1645 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); | |
1646 | if (r < 0) | |
1647 | return NULL; | |
1648 | } | |
1649 | ||
1650 | escaped = cg_escape(u->id); | |
1651 | if (!escaped) | |
1652 | return NULL; | |
1653 | ||
657ee2d8 | 1654 | return path_join(empty_to_root(u->manager->cgroup_root), slice, escaped); |
efdb0237 LP |
1655 | } |
1656 | ||
1657 | int unit_set_cgroup_path(Unit *u, const char *path) { | |
1658 | _cleanup_free_ char *p = NULL; | |
1659 | int r; | |
1660 | ||
1661 | assert(u); | |
1662 | ||
5210387e LP |
1663 | if (streq_ptr(u->cgroup_path, path)) |
1664 | return 0; | |
1665 | ||
efdb0237 LP |
1666 | if (path) { |
1667 | p = strdup(path); | |
1668 | if (!p) | |
1669 | return -ENOMEM; | |
5210387e | 1670 | } |
efdb0237 LP |
1671 | |
1672 | if (p) { | |
1673 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
1674 | if (r < 0) | |
1675 | return r; | |
1676 | } | |
1677 | ||
1678 | unit_release_cgroup(u); | |
ae2a15bc | 1679 | u->cgroup_path = TAKE_PTR(p); |
efdb0237 LP |
1680 | |
1681 | return 1; | |
1682 | } | |
1683 | ||
1684 | int unit_watch_cgroup(Unit *u) { | |
ab2c3861 | 1685 | _cleanup_free_ char *events = NULL; |
efdb0237 LP |
1686 | int r; |
1687 | ||
1688 | assert(u); | |
1689 | ||
0bb814c2 LP |
1690 | /* Watches the "cgroups.events" attribute of this unit's cgroup for "empty" events, but only if |
1691 | * cgroupv2 is available. */ | |
1692 | ||
efdb0237 LP |
1693 | if (!u->cgroup_path) |
1694 | return 0; | |
1695 | ||
0bb814c2 | 1696 | if (u->cgroup_control_inotify_wd >= 0) |
efdb0237 LP |
1697 | return 0; |
1698 | ||
1699 | /* Only applies to the unified hierarchy */ | |
c22800e4 | 1700 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); |
b4cccbc1 LP |
1701 | if (r < 0) |
1702 | return log_error_errno(r, "Failed to determine whether the name=systemd hierarchy is unified: %m"); | |
1703 | if (r == 0) | |
efdb0237 LP |
1704 | return 0; |
1705 | ||
0bb814c2 | 1706 | /* No point in watch the top-level slice, it's never going to run empty. */ |
efdb0237 LP |
1707 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
1708 | return 0; | |
1709 | ||
0bb814c2 | 1710 | r = hashmap_ensure_allocated(&u->manager->cgroup_control_inotify_wd_unit, &trivial_hash_ops); |
efdb0237 LP |
1711 | if (r < 0) |
1712 | return log_oom(); | |
1713 | ||
ab2c3861 | 1714 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", &events); |
efdb0237 LP |
1715 | if (r < 0) |
1716 | return log_oom(); | |
1717 | ||
0bb814c2 LP |
1718 | u->cgroup_control_inotify_wd = inotify_add_watch(u->manager->cgroup_inotify_fd, events, IN_MODIFY); |
1719 | if (u->cgroup_control_inotify_wd < 0) { | |
efdb0237 | 1720 | |
0bb814c2 LP |
1721 | if (errno == ENOENT) /* If the directory is already gone we don't need to track it, so this |
1722 | * is not an error */ | |
efdb0237 LP |
1723 | return 0; |
1724 | ||
0bb814c2 | 1725 | return log_unit_error_errno(u, errno, "Failed to add control inotify watch descriptor for control group %s: %m", u->cgroup_path); |
efdb0237 LP |
1726 | } |
1727 | ||
0bb814c2 | 1728 | r = hashmap_put(u->manager->cgroup_control_inotify_wd_unit, INT_TO_PTR(u->cgroup_control_inotify_wd), u); |
efdb0237 | 1729 | if (r < 0) |
0bb814c2 | 1730 | return log_unit_error_errno(u, r, "Failed to add control inotify watch descriptor to hash map: %m"); |
efdb0237 LP |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
afcfaa69 LP |
1735 | int unit_watch_cgroup_memory(Unit *u) { |
1736 | _cleanup_free_ char *events = NULL; | |
1737 | CGroupContext *c; | |
1738 | int r; | |
1739 | ||
1740 | assert(u); | |
1741 | ||
1742 | /* Watches the "memory.events" attribute of this unit's cgroup for "oom_kill" events, but only if | |
1743 | * cgroupv2 is available. */ | |
1744 | ||
1745 | if (!u->cgroup_path) | |
1746 | return 0; | |
1747 | ||
1748 | c = unit_get_cgroup_context(u); | |
1749 | if (!c) | |
1750 | return 0; | |
1751 | ||
1752 | /* The "memory.events" attribute is only available if the memory controller is on. Let's hence tie | |
1753 | * this to memory accounting, in a way watching for OOM kills is a form of memory accounting after | |
1754 | * all. */ | |
1755 | if (!c->memory_accounting) | |
1756 | return 0; | |
1757 | ||
1758 | /* Don't watch inner nodes, as the kernel doesn't report oom_kill events recursively currently, and | |
1759 | * we also don't want to generate a log message for each parent cgroup of a process. */ | |
1760 | if (u->type == UNIT_SLICE) | |
1761 | return 0; | |
1762 | ||
1763 | if (u->cgroup_memory_inotify_wd >= 0) | |
1764 | return 0; | |
1765 | ||
1766 | /* Only applies to the unified hierarchy */ | |
1767 | r = cg_all_unified(); | |
1768 | if (r < 0) | |
1769 | return log_error_errno(r, "Failed to determine whether the memory controller is unified: %m"); | |
1770 | if (r == 0) | |
1771 | return 0; | |
1772 | ||
1773 | r = hashmap_ensure_allocated(&u->manager->cgroup_memory_inotify_wd_unit, &trivial_hash_ops); | |
1774 | if (r < 0) | |
1775 | return log_oom(); | |
1776 | ||
1777 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "memory.events", &events); | |
1778 | if (r < 0) | |
1779 | return log_oom(); | |
1780 | ||
1781 | u->cgroup_memory_inotify_wd = inotify_add_watch(u->manager->cgroup_inotify_fd, events, IN_MODIFY); | |
1782 | if (u->cgroup_memory_inotify_wd < 0) { | |
1783 | ||
1784 | if (errno == ENOENT) /* If the directory is already gone we don't need to track it, so this | |
1785 | * is not an error */ | |
1786 | return 0; | |
1787 | ||
1788 | return log_unit_error_errno(u, errno, "Failed to add memory inotify watch descriptor for control group %s: %m", u->cgroup_path); | |
1789 | } | |
1790 | ||
1791 | r = hashmap_put(u->manager->cgroup_memory_inotify_wd_unit, INT_TO_PTR(u->cgroup_memory_inotify_wd), u); | |
1792 | if (r < 0) | |
1793 | return log_unit_error_errno(u, r, "Failed to add memory inotify watch descriptor to hash map: %m"); | |
1794 | ||
1795 | return 0; | |
1796 | } | |
1797 | ||
a4634b21 LP |
1798 | int unit_pick_cgroup_path(Unit *u) { |
1799 | _cleanup_free_ char *path = NULL; | |
1800 | int r; | |
1801 | ||
1802 | assert(u); | |
1803 | ||
1804 | if (u->cgroup_path) | |
1805 | return 0; | |
1806 | ||
1807 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
1808 | return -EINVAL; | |
1809 | ||
1810 | path = unit_default_cgroup_path(u); | |
1811 | if (!path) | |
1812 | return log_oom(); | |
1813 | ||
1814 | r = unit_set_cgroup_path(u, path); | |
1815 | if (r == -EEXIST) | |
1816 | return log_unit_error_errno(u, r, "Control group %s exists already.", path); | |
1817 | if (r < 0) | |
1818 | return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", path); | |
1819 | ||
1820 | return 0; | |
1821 | } | |
1822 | ||
efdb0237 LP |
1823 | static int unit_create_cgroup( |
1824 | Unit *u, | |
1825 | CGroupMask target_mask, | |
0d2d6fbf CD |
1826 | CGroupMask enable_mask, |
1827 | ManagerState state) { | |
efdb0237 | 1828 | |
65be7e06 | 1829 | bool created; |
27adcc97 | 1830 | int r; |
64747e2d | 1831 | |
4ad49000 | 1832 | assert(u); |
64747e2d | 1833 | |
27c4ed79 | 1834 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
0cd385d3 LP |
1835 | return 0; |
1836 | ||
a4634b21 LP |
1837 | /* Figure out our cgroup path */ |
1838 | r = unit_pick_cgroup_path(u); | |
1839 | if (r < 0) | |
1840 | return r; | |
b58b8e11 | 1841 | |
03b90d4b | 1842 | /* First, create our own group */ |
efdb0237 | 1843 | r = cg_create_everywhere(u->manager->cgroup_supported, target_mask, u->cgroup_path); |
23bbb0de | 1844 | if (r < 0) |
efdb0237 | 1845 | return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", u->cgroup_path); |
490c5a37 | 1846 | created = r; |
efdb0237 LP |
1847 | |
1848 | /* Start watching it */ | |
1849 | (void) unit_watch_cgroup(u); | |
afcfaa69 | 1850 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 1851 | |
65be7e06 | 1852 | /* Preserve enabled controllers in delegated units, adjust others. */ |
1fd3a10c | 1853 | if (created || !u->cgroup_realized || !unit_cgroup_delegate(u)) { |
27adcc97 | 1854 | CGroupMask result_mask = 0; |
65be7e06 ZJS |
1855 | |
1856 | /* Enable all controllers we need */ | |
27adcc97 | 1857 | r = cg_enable_everywhere(u->manager->cgroup_supported, enable_mask, u->cgroup_path, &result_mask); |
65be7e06 | 1858 | if (r < 0) |
27adcc97 LP |
1859 | log_unit_warning_errno(u, r, "Failed to enable/disable controllers on cgroup %s, ignoring: %m", u->cgroup_path); |
1860 | ||
1861 | /* If we just turned off a controller, this might release the controller for our parent too, let's | |
1862 | * enqueue the parent for re-realization in that case again. */ | |
1863 | if (UNIT_ISSET(u->slice)) { | |
1864 | CGroupMask turned_off; | |
1865 | ||
1866 | turned_off = (u->cgroup_realized ? u->cgroup_enabled_mask & ~result_mask : 0); | |
1867 | if (turned_off != 0) { | |
1868 | Unit *parent; | |
1869 | ||
1870 | /* Force the parent to propagate the enable mask to the kernel again, by invalidating | |
1871 | * the controller we just turned off. */ | |
1872 | ||
1873 | for (parent = UNIT_DEREF(u->slice); parent; parent = UNIT_DEREF(parent->slice)) | |
1874 | unit_invalidate_cgroup(parent, turned_off); | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | /* Remember what's actually enabled now */ | |
1879 | u->cgroup_enabled_mask = result_mask; | |
65be7e06 | 1880 | } |
03b90d4b LP |
1881 | |
1882 | /* Keep track that this is now realized */ | |
4ad49000 | 1883 | u->cgroup_realized = true; |
efdb0237 | 1884 | u->cgroup_realized_mask = target_mask; |
4ad49000 | 1885 | |
1d9cc876 | 1886 | if (u->type != UNIT_SLICE && !unit_cgroup_delegate(u)) { |
0cd385d3 LP |
1887 | |
1888 | /* Then, possibly move things over, but not if | |
1889 | * subgroups may contain processes, which is the case | |
1890 | * for slice and delegation units. */ | |
1891 | r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, u->cgroup_path, migrate_callback, u); | |
1892 | if (r < 0) | |
efdb0237 | 1893 | log_unit_warning_errno(u, r, "Failed to migrate cgroup from to %s, ignoring: %m", u->cgroup_path); |
0cd385d3 | 1894 | } |
03b90d4b | 1895 | |
0d2d6fbf CD |
1896 | /* Set attributes */ |
1897 | cgroup_context_apply(u, target_mask, state); | |
1898 | cgroup_xattr_apply(u); | |
1899 | ||
64747e2d LP |
1900 | return 0; |
1901 | } | |
1902 | ||
6592b975 LP |
1903 | static int unit_attach_pid_to_cgroup_via_bus(Unit *u, pid_t pid, const char *suffix_path) { |
1904 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
1905 | char *pp; | |
7b3fd631 | 1906 | int r; |
6592b975 | 1907 | |
7b3fd631 LP |
1908 | assert(u); |
1909 | ||
6592b975 LP |
1910 | if (MANAGER_IS_SYSTEM(u->manager)) |
1911 | return -EINVAL; | |
1912 | ||
1913 | if (!u->manager->system_bus) | |
1914 | return -EIO; | |
1915 | ||
1916 | if (!u->cgroup_path) | |
1917 | return -EINVAL; | |
1918 | ||
1919 | /* Determine this unit's cgroup path relative to our cgroup root */ | |
1920 | pp = path_startswith(u->cgroup_path, u->manager->cgroup_root); | |
1921 | if (!pp) | |
1922 | return -EINVAL; | |
1923 | ||
1924 | pp = strjoina("/", pp, suffix_path); | |
858d36c1 | 1925 | path_simplify(pp, false); |
6592b975 LP |
1926 | |
1927 | r = sd_bus_call_method(u->manager->system_bus, | |
1928 | "org.freedesktop.systemd1", | |
1929 | "/org/freedesktop/systemd1", | |
1930 | "org.freedesktop.systemd1.Manager", | |
1931 | "AttachProcessesToUnit", | |
1932 | &error, NULL, | |
1933 | "ssau", | |
1934 | NULL /* empty unit name means client's unit, i.e. us */, pp, 1, (uint32_t) pid); | |
7b3fd631 | 1935 | if (r < 0) |
6592b975 LP |
1936 | return log_unit_debug_errno(u, r, "Failed to attach unit process " PID_FMT " via the bus: %s", pid, bus_error_message(&error, r)); |
1937 | ||
1938 | return 0; | |
1939 | } | |
1940 | ||
1941 | int unit_attach_pids_to_cgroup(Unit *u, Set *pids, const char *suffix_path) { | |
1942 | CGroupMask delegated_mask; | |
1943 | const char *p; | |
1944 | Iterator i; | |
1945 | void *pidp; | |
1946 | int r, q; | |
1947 | ||
1948 | assert(u); | |
1949 | ||
1950 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
1951 | return -EINVAL; | |
1952 | ||
1953 | if (set_isempty(pids)) | |
1954 | return 0; | |
7b3fd631 | 1955 | |
fab34748 KL |
1956 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
1957 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
1958 | r = bpf_firewall_load_custom(u); | |
1959 | if (r < 0) | |
1960 | return r; | |
1961 | ||
6592b975 | 1962 | r = unit_realize_cgroup(u); |
7b3fd631 LP |
1963 | if (r < 0) |
1964 | return r; | |
1965 | ||
6592b975 LP |
1966 | if (isempty(suffix_path)) |
1967 | p = u->cgroup_path; | |
1968 | else | |
270384b2 | 1969 | p = prefix_roota(u->cgroup_path, suffix_path); |
6592b975 LP |
1970 | |
1971 | delegated_mask = unit_get_delegate_mask(u); | |
1972 | ||
1973 | r = 0; | |
1974 | SET_FOREACH(pidp, pids, i) { | |
1975 | pid_t pid = PTR_TO_PID(pidp); | |
1976 | CGroupController c; | |
1977 | ||
1978 | /* First, attach the PID to the main cgroup hierarchy */ | |
1979 | q = cg_attach(SYSTEMD_CGROUP_CONTROLLER, p, pid); | |
1980 | if (q < 0) { | |
1981 | log_unit_debug_errno(u, q, "Couldn't move process " PID_FMT " to requested cgroup '%s': %m", pid, p); | |
1982 | ||
1983 | if (MANAGER_IS_USER(u->manager) && IN_SET(q, -EPERM, -EACCES)) { | |
1984 | int z; | |
1985 | ||
1986 | /* If we are in a user instance, and we can't move the process ourselves due to | |
1987 | * permission problems, let's ask the system instance about it instead. Since it's more | |
1988 | * privileged it might be able to move the process across the leaves of a subtree who's | |
1989 | * top node is not owned by us. */ | |
1990 | ||
1991 | z = unit_attach_pid_to_cgroup_via_bus(u, pid, suffix_path); | |
1992 | if (z < 0) | |
1993 | log_unit_debug_errno(u, z, "Couldn't move process " PID_FMT " to requested cgroup '%s' via the system bus either: %m", pid, p); | |
1994 | else | |
1995 | continue; /* When the bus thing worked via the bus we are fully done for this PID. */ | |
1996 | } | |
1997 | ||
1998 | if (r >= 0) | |
1999 | r = q; /* Remember first error */ | |
2000 | ||
2001 | continue; | |
2002 | } | |
2003 | ||
2004 | q = cg_all_unified(); | |
2005 | if (q < 0) | |
2006 | return q; | |
2007 | if (q > 0) | |
2008 | continue; | |
2009 | ||
2010 | /* In the legacy hierarchy, attach the process to the request cgroup if possible, and if not to the | |
2011 | * innermost realized one */ | |
2012 | ||
2013 | for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) { | |
2014 | CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c); | |
2015 | const char *realized; | |
2016 | ||
2017 | if (!(u->manager->cgroup_supported & bit)) | |
2018 | continue; | |
2019 | ||
2020 | /* If this controller is delegated and realized, honour the caller's request for the cgroup suffix. */ | |
2021 | if (delegated_mask & u->cgroup_realized_mask & bit) { | |
2022 | q = cg_attach(cgroup_controller_to_string(c), p, pid); | |
2023 | if (q >= 0) | |
2024 | continue; /* Success! */ | |
2025 | ||
2026 | log_unit_debug_errno(u, q, "Failed to attach PID " PID_FMT " to requested cgroup %s in controller %s, falling back to unit's cgroup: %m", | |
2027 | pid, p, cgroup_controller_to_string(c)); | |
2028 | } | |
2029 | ||
2030 | /* So this controller is either not delegate or realized, or something else weird happened. In | |
2031 | * that case let's attach the PID at least to the closest cgroup up the tree that is | |
2032 | * realized. */ | |
2033 | realized = unit_get_realized_cgroup_path(u, bit); | |
2034 | if (!realized) | |
2035 | continue; /* Not even realized in the root slice? Then let's not bother */ | |
2036 | ||
2037 | q = cg_attach(cgroup_controller_to_string(c), realized, pid); | |
2038 | if (q < 0) | |
2039 | log_unit_debug_errno(u, q, "Failed to attach PID " PID_FMT " to realized cgroup %s in controller %s, ignoring: %m", | |
2040 | pid, realized, cgroup_controller_to_string(c)); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | return r; | |
7b3fd631 LP |
2045 | } |
2046 | ||
906c06f6 DM |
2047 | static bool unit_has_mask_realized( |
2048 | Unit *u, | |
2049 | CGroupMask target_mask, | |
17f14955 | 2050 | CGroupMask enable_mask) { |
906c06f6 | 2051 | |
bc432dc7 LP |
2052 | assert(u); |
2053 | ||
d5095dcd LP |
2054 | /* Returns true if this unit is fully realized. We check four things: |
2055 | * | |
2056 | * 1. Whether the cgroup was created at all | |
4e1dfa45 CD |
2057 | * 2. Whether the cgroup was created in all the hierarchies we need it to be created in (in case of cgroup v1) |
2058 | * 3. Whether the cgroup has all the right controllers enabled (in case of cgroup v2) | |
d5095dcd LP |
2059 | * 4. Whether the invalidation mask is currently zero |
2060 | * | |
2061 | * If you wonder why we mask the target realization and enable mask with CGROUP_MASK_V1/CGROUP_MASK_V2: note | |
4e1dfa45 CD |
2062 | * that there are three sets of bitmasks: CGROUP_MASK_V1 (for real cgroup v1 controllers), CGROUP_MASK_V2 (for |
2063 | * real cgroup v2 controllers) and CGROUP_MASK_BPF (for BPF-based pseudo-controllers). Now, cgroup_realized_mask | |
2064 | * is only matters for cgroup v1 controllers, and cgroup_enabled_mask only used for cgroup v2, and if they | |
d5095dcd LP |
2065 | * differ in the others, we don't really care. (After all, the cgroup_enabled_mask tracks with controllers are |
2066 | * enabled through cgroup.subtree_control, and since the BPF pseudo-controllers don't show up there, they | |
2067 | * simply don't matter. */ | |
2068 | ||
906c06f6 | 2069 | return u->cgroup_realized && |
d5095dcd LP |
2070 | ((u->cgroup_realized_mask ^ target_mask) & CGROUP_MASK_V1) == 0 && |
2071 | ((u->cgroup_enabled_mask ^ enable_mask) & CGROUP_MASK_V2) == 0 && | |
17f14955 | 2072 | u->cgroup_invalidated_mask == 0; |
6414b7c9 DS |
2073 | } |
2074 | ||
4f6f62e4 CD |
2075 | static bool unit_has_mask_disables_realized( |
2076 | Unit *u, | |
2077 | CGroupMask target_mask, | |
2078 | CGroupMask enable_mask) { | |
2079 | ||
2080 | assert(u); | |
2081 | ||
2082 | /* Returns true if all controllers which should be disabled are indeed disabled. | |
2083 | * | |
2084 | * Unlike unit_has_mask_realized, we don't care what was enabled, only that anything we want to remove is | |
2085 | * already removed. */ | |
2086 | ||
2087 | return !u->cgroup_realized || | |
2088 | (FLAGS_SET(u->cgroup_realized_mask, target_mask & CGROUP_MASK_V1) && | |
2089 | FLAGS_SET(u->cgroup_enabled_mask, enable_mask & CGROUP_MASK_V2)); | |
2090 | } | |
2091 | ||
a57669d2 CD |
2092 | static bool unit_has_mask_enables_realized( |
2093 | Unit *u, | |
2094 | CGroupMask target_mask, | |
2095 | CGroupMask enable_mask) { | |
2096 | ||
2097 | assert(u); | |
2098 | ||
2099 | /* Returns true if all controllers which should be enabled are indeed enabled. | |
2100 | * | |
2101 | * Unlike unit_has_mask_realized, we don't care about the controllers that are not present, only that anything | |
2102 | * we want to add is already added. */ | |
2103 | ||
2104 | return u->cgroup_realized && | |
c72703e2 CD |
2105 | ((u->cgroup_realized_mask | target_mask) & CGROUP_MASK_V1) == (u->cgroup_realized_mask & CGROUP_MASK_V1) && |
2106 | ((u->cgroup_enabled_mask | enable_mask) & CGROUP_MASK_V2) == (u->cgroup_enabled_mask & CGROUP_MASK_V2); | |
a57669d2 CD |
2107 | } |
2108 | ||
27adcc97 | 2109 | void unit_add_to_cgroup_realize_queue(Unit *u) { |
2aa57a65 LP |
2110 | assert(u); |
2111 | ||
2112 | if (u->in_cgroup_realize_queue) | |
2113 | return; | |
2114 | ||
2115 | LIST_PREPEND(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
2116 | u->in_cgroup_realize_queue = true; | |
2117 | } | |
2118 | ||
2119 | static void unit_remove_from_cgroup_realize_queue(Unit *u) { | |
2120 | assert(u); | |
2121 | ||
2122 | if (!u->in_cgroup_realize_queue) | |
2123 | return; | |
2124 | ||
2125 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
2126 | u->in_cgroup_realize_queue = false; | |
2127 | } | |
2128 | ||
a57669d2 CD |
2129 | /* Controllers can only be enabled breadth-first, from the root of the |
2130 | * hierarchy downwards to the unit in question. */ | |
2131 | static int unit_realize_cgroup_now_enable(Unit *u, ManagerState state) { | |
2132 | CGroupMask target_mask, enable_mask, new_target_mask, new_enable_mask; | |
2133 | int r; | |
2134 | ||
2135 | assert(u); | |
2136 | ||
2137 | /* First go deal with this unit's parent, or we won't be able to enable | |
2138 | * any new controllers at this layer. */ | |
2139 | if (UNIT_ISSET(u->slice)) { | |
2140 | r = unit_realize_cgroup_now_enable(UNIT_DEREF(u->slice), state); | |
2141 | if (r < 0) | |
2142 | return r; | |
2143 | } | |
2144 | ||
2145 | target_mask = unit_get_target_mask(u); | |
2146 | enable_mask = unit_get_enable_mask(u); | |
2147 | ||
2148 | /* We can only enable in this direction, don't try to disable anything. | |
2149 | */ | |
2150 | if (unit_has_mask_enables_realized(u, target_mask, enable_mask)) | |
2151 | return 0; | |
2152 | ||
2153 | new_target_mask = u->cgroup_realized_mask | target_mask; | |
2154 | new_enable_mask = u->cgroup_enabled_mask | enable_mask; | |
2155 | ||
c72703e2 | 2156 | return unit_create_cgroup(u, new_target_mask, new_enable_mask, state); |
a57669d2 CD |
2157 | } |
2158 | ||
4f6f62e4 CD |
2159 | /* Controllers can only be disabled depth-first, from the leaves of the |
2160 | * hierarchy upwards to the unit in question. */ | |
2161 | static int unit_realize_cgroup_now_disable(Unit *u, ManagerState state) { | |
2162 | Iterator i; | |
2163 | Unit *m; | |
2164 | void *v; | |
2165 | ||
2166 | assert(u); | |
2167 | ||
2168 | if (u->type != UNIT_SLICE) | |
2169 | return 0; | |
2170 | ||
2171 | HASHMAP_FOREACH_KEY(v, m, u->dependencies[UNIT_BEFORE], i) { | |
2172 | CGroupMask target_mask, enable_mask, new_target_mask, new_enable_mask; | |
2173 | int r; | |
2174 | ||
2175 | if (UNIT_DEREF(m->slice) != u) | |
2176 | continue; | |
2177 | ||
2178 | /* The cgroup for this unit might not actually be fully | |
2179 | * realised yet, in which case it isn't holding any controllers | |
2180 | * open anyway. */ | |
2181 | if (!m->cgroup_path) | |
2182 | continue; | |
2183 | ||
2184 | /* We must disable those below us first in order to release the | |
2185 | * controller. */ | |
2186 | if (m->type == UNIT_SLICE) | |
2187 | (void) unit_realize_cgroup_now_disable(m, state); | |
2188 | ||
2189 | target_mask = unit_get_target_mask(m); | |
2190 | enable_mask = unit_get_enable_mask(m); | |
2191 | ||
2192 | /* We can only disable in this direction, don't try to enable | |
2193 | * anything. */ | |
2194 | if (unit_has_mask_disables_realized(m, target_mask, enable_mask)) | |
2195 | continue; | |
2196 | ||
2197 | new_target_mask = m->cgroup_realized_mask & target_mask; | |
2198 | new_enable_mask = m->cgroup_enabled_mask & enable_mask; | |
2199 | ||
2200 | r = unit_create_cgroup(m, new_target_mask, new_enable_mask, state); | |
2201 | if (r < 0) | |
2202 | return r; | |
2203 | } | |
2204 | ||
2205 | return 0; | |
2206 | } | |
a57669d2 | 2207 | |
6414b7c9 DS |
2208 | /* Check if necessary controllers and attributes for a unit are in place. |
2209 | * | |
a57669d2 CD |
2210 | * - If so, do nothing. |
2211 | * - If not, create paths, move processes over, and set attributes. | |
2212 | * | |
2213 | * Controllers can only be *enabled* in a breadth-first way, and *disabled* in | |
2214 | * a depth-first way. As such the process looks like this: | |
2215 | * | |
2216 | * Suppose we have a cgroup hierarchy which looks like this: | |
2217 | * | |
2218 | * root | |
2219 | * / \ | |
2220 | * / \ | |
2221 | * / \ | |
2222 | * a b | |
2223 | * / \ / \ | |
2224 | * / \ / \ | |
2225 | * c d e f | |
2226 | * / \ / \ / \ / \ | |
2227 | * h i j k l m n o | |
2228 | * | |
2229 | * 1. We want to realise cgroup "d" now. | |
c72703e2 | 2230 | * 2. cgroup "a" has DisableControllers=cpu in the associated unit. |
a57669d2 CD |
2231 | * 3. cgroup "k" just started requesting the memory controller. |
2232 | * | |
2233 | * To make this work we must do the following in order: | |
2234 | * | |
2235 | * 1. Disable CPU controller in k, j | |
2236 | * 2. Disable CPU controller in d | |
2237 | * 3. Enable memory controller in root | |
2238 | * 4. Enable memory controller in a | |
2239 | * 5. Enable memory controller in d | |
2240 | * 6. Enable memory controller in k | |
2241 | * | |
2242 | * Notice that we need to touch j in one direction, but not the other. We also | |
2243 | * don't go beyond d when disabling -- it's up to "a" to get realized if it | |
2244 | * wants to disable further. The basic rules are therefore: | |
2245 | * | |
2246 | * - If you're disabling something, you need to realise all of the cgroups from | |
2247 | * your recursive descendants to the root. This starts from the leaves. | |
2248 | * - If you're enabling something, you need to realise from the root cgroup | |
2249 | * downwards, but you don't need to iterate your recursive descendants. | |
6414b7c9 DS |
2250 | * |
2251 | * Returns 0 on success and < 0 on failure. */ | |
db785129 | 2252 | static int unit_realize_cgroup_now(Unit *u, ManagerState state) { |
efdb0237 | 2253 | CGroupMask target_mask, enable_mask; |
6414b7c9 | 2254 | int r; |
64747e2d | 2255 | |
4ad49000 | 2256 | assert(u); |
64747e2d | 2257 | |
2aa57a65 | 2258 | unit_remove_from_cgroup_realize_queue(u); |
64747e2d | 2259 | |
efdb0237 | 2260 | target_mask = unit_get_target_mask(u); |
ccf78df1 TH |
2261 | enable_mask = unit_get_enable_mask(u); |
2262 | ||
17f14955 | 2263 | if (unit_has_mask_realized(u, target_mask, enable_mask)) |
0a1eb06d | 2264 | return 0; |
64747e2d | 2265 | |
4f6f62e4 CD |
2266 | /* Disable controllers below us, if there are any */ |
2267 | r = unit_realize_cgroup_now_disable(u, state); | |
2268 | if (r < 0) | |
2269 | return r; | |
2270 | ||
2271 | /* Enable controllers above us, if there are any */ | |
6414b7c9 | 2272 | if (UNIT_ISSET(u->slice)) { |
a57669d2 | 2273 | r = unit_realize_cgroup_now_enable(UNIT_DEREF(u->slice), state); |
6414b7c9 DS |
2274 | if (r < 0) |
2275 | return r; | |
2276 | } | |
4ad49000 | 2277 | |
0d2d6fbf CD |
2278 | /* Now actually deal with the cgroup we were trying to realise and set attributes */ |
2279 | r = unit_create_cgroup(u, target_mask, enable_mask, state); | |
6414b7c9 DS |
2280 | if (r < 0) |
2281 | return r; | |
2282 | ||
c2baf11c LP |
2283 | /* Now, reset the invalidation mask */ |
2284 | u->cgroup_invalidated_mask = 0; | |
6414b7c9 | 2285 | return 0; |
64747e2d LP |
2286 | } |
2287 | ||
91a6073e | 2288 | unsigned manager_dispatch_cgroup_realize_queue(Manager *m) { |
db785129 | 2289 | ManagerState state; |
4ad49000 | 2290 | unsigned n = 0; |
db785129 | 2291 | Unit *i; |
6414b7c9 | 2292 | int r; |
ecedd90f | 2293 | |
91a6073e LP |
2294 | assert(m); |
2295 | ||
db785129 LP |
2296 | state = manager_state(m); |
2297 | ||
91a6073e LP |
2298 | while ((i = m->cgroup_realize_queue)) { |
2299 | assert(i->in_cgroup_realize_queue); | |
ecedd90f | 2300 | |
2aa57a65 LP |
2301 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(i))) { |
2302 | /* Maybe things changed, and the unit is not actually active anymore? */ | |
2303 | unit_remove_from_cgroup_realize_queue(i); | |
2304 | continue; | |
2305 | } | |
2306 | ||
db785129 | 2307 | r = unit_realize_cgroup_now(i, state); |
6414b7c9 | 2308 | if (r < 0) |
efdb0237 | 2309 | log_warning_errno(r, "Failed to realize cgroups for queued unit %s, ignoring: %m", i->id); |
0a1eb06d | 2310 | |
4ad49000 LP |
2311 | n++; |
2312 | } | |
ecedd90f | 2313 | |
4ad49000 | 2314 | return n; |
8e274523 LP |
2315 | } |
2316 | ||
91a6073e | 2317 | static void unit_add_siblings_to_cgroup_realize_queue(Unit *u) { |
4ad49000 | 2318 | Unit *slice; |
ca949c9d | 2319 | |
65f6b6bd | 2320 | /* This adds the siblings of the specified unit and the siblings of all parent units to the cgroup |
e1e98911 LP |
2321 | * queue. (But neither the specified unit itself nor the parents.) |
2322 | * | |
c238a2f8 LP |
2323 | * Propagation of realization "side-ways" (i.e. towards siblings) is relevant on cgroup-v1 where |
2324 | * scheduling becomes very weird if two units that own processes reside in the same slice, but one is | |
2325 | * realized in the "cpu" hierarchy and one is not (for example because one has CPUWeight= set and the | |
2326 | * other does not), because that means individual processes need to be scheduled against whole | |
2327 | * cgroups. Let's avoid this asymmetry by always ensuring that units below a slice that are realized | |
2328 | * at all are always realized in *all* their hierarchies, and it is sufficient for a unit's sibling | |
2329 | * to be realized for the unit itself to be realized too. */ | |
4ad49000 LP |
2330 | |
2331 | while ((slice = UNIT_DEREF(u->slice))) { | |
2332 | Iterator i; | |
2333 | Unit *m; | |
eef85c4a | 2334 | void *v; |
8f53a7b8 | 2335 | |
65f6b6bd | 2336 | HASHMAP_FOREACH_KEY(v, m, slice->dependencies[UNIT_BEFORE], i) { |
e1e98911 | 2337 | |
65f6b6bd | 2338 | /* Skip units that have a dependency on the slice but aren't actually in it. */ |
4ad49000 | 2339 | if (UNIT_DEREF(m->slice) != slice) |
50159e6a | 2340 | continue; |
8e274523 | 2341 | |
65f6b6bd | 2342 | /* No point in doing cgroup application for units without active processes. */ |
6414b7c9 DS |
2343 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(m))) |
2344 | continue; | |
2345 | ||
e1e98911 LP |
2346 | /* We only enqueue siblings if they were realized once at least, in the main |
2347 | * hierarchy. */ | |
2348 | if (!m->cgroup_realized) | |
2349 | continue; | |
2350 | ||
65f6b6bd LP |
2351 | /* If the unit doesn't need any new controllers and has current ones realized, it |
2352 | * doesn't need any changes. */ | |
906c06f6 DM |
2353 | if (unit_has_mask_realized(m, |
2354 | unit_get_target_mask(m), | |
17f14955 | 2355 | unit_get_enable_mask(m))) |
6414b7c9 DS |
2356 | continue; |
2357 | ||
91a6073e | 2358 | unit_add_to_cgroup_realize_queue(m); |
50159e6a LP |
2359 | } |
2360 | ||
4ad49000 | 2361 | u = slice; |
8e274523 | 2362 | } |
4ad49000 LP |
2363 | } |
2364 | ||
0a1eb06d | 2365 | int unit_realize_cgroup(Unit *u) { |
4ad49000 LP |
2366 | assert(u); |
2367 | ||
35b7ff80 | 2368 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
0a1eb06d | 2369 | return 0; |
8e274523 | 2370 | |
4ad49000 LP |
2371 | /* So, here's the deal: when realizing the cgroups for this |
2372 | * unit, we need to first create all parents, but there's more | |
2373 | * actually: for the weight-based controllers we also need to | |
2374 | * make sure that all our siblings (i.e. units that are in the | |
73e231ab | 2375 | * same slice as we are) have cgroups, too. Otherwise, things |
4ad49000 LP |
2376 | * would become very uneven as each of their processes would |
2377 | * get as much resources as all our group together. This call | |
2378 | * will synchronously create the parent cgroups, but will | |
2379 | * defer work on the siblings to the next event loop | |
2380 | * iteration. */ | |
ca949c9d | 2381 | |
4ad49000 | 2382 | /* Add all sibling slices to the cgroup queue. */ |
91a6073e | 2383 | unit_add_siblings_to_cgroup_realize_queue(u); |
4ad49000 | 2384 | |
6414b7c9 | 2385 | /* And realize this one now (and apply the values) */ |
db785129 | 2386 | return unit_realize_cgroup_now(u, manager_state(u->manager)); |
8e274523 LP |
2387 | } |
2388 | ||
efdb0237 LP |
2389 | void unit_release_cgroup(Unit *u) { |
2390 | assert(u); | |
2391 | ||
8a0d5388 LP |
2392 | /* Forgets all cgroup details for this cgroup — but does *not* destroy the cgroup. This is hence OK to call |
2393 | * when we close down everything for reexecution, where we really want to leave the cgroup in place. */ | |
efdb0237 LP |
2394 | |
2395 | if (u->cgroup_path) { | |
2396 | (void) hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2397 | u->cgroup_path = mfree(u->cgroup_path); | |
2398 | } | |
2399 | ||
0bb814c2 LP |
2400 | if (u->cgroup_control_inotify_wd >= 0) { |
2401 | if (inotify_rm_watch(u->manager->cgroup_inotify_fd, u->cgroup_control_inotify_wd) < 0) | |
2402 | log_unit_debug_errno(u, errno, "Failed to remove cgroup control inotify watch %i for %s, ignoring: %m", u->cgroup_control_inotify_wd, u->id); | |
efdb0237 | 2403 | |
0bb814c2 LP |
2404 | (void) hashmap_remove(u->manager->cgroup_control_inotify_wd_unit, INT_TO_PTR(u->cgroup_control_inotify_wd)); |
2405 | u->cgroup_control_inotify_wd = -1; | |
efdb0237 | 2406 | } |
afcfaa69 LP |
2407 | |
2408 | if (u->cgroup_memory_inotify_wd >= 0) { | |
2409 | if (inotify_rm_watch(u->manager->cgroup_inotify_fd, u->cgroup_memory_inotify_wd) < 0) | |
2410 | log_unit_debug_errno(u, errno, "Failed to remove cgroup memory inotify watch %i for %s, ignoring: %m", u->cgroup_memory_inotify_wd, u->id); | |
2411 | ||
2412 | (void) hashmap_remove(u->manager->cgroup_memory_inotify_wd_unit, INT_TO_PTR(u->cgroup_memory_inotify_wd)); | |
2413 | u->cgroup_memory_inotify_wd = -1; | |
2414 | } | |
efdb0237 LP |
2415 | } |
2416 | ||
2417 | void unit_prune_cgroup(Unit *u) { | |
8e274523 | 2418 | int r; |
efdb0237 | 2419 | bool is_root_slice; |
8e274523 | 2420 | |
4ad49000 | 2421 | assert(u); |
8e274523 | 2422 | |
efdb0237 LP |
2423 | /* Removes the cgroup, if empty and possible, and stops watching it. */ |
2424 | ||
4ad49000 LP |
2425 | if (!u->cgroup_path) |
2426 | return; | |
8e274523 | 2427 | |
fe700f46 LP |
2428 | (void) unit_get_cpu_usage(u, NULL); /* Cache the last CPU usage value before we destroy the cgroup */ |
2429 | ||
efdb0237 LP |
2430 | is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE); |
2431 | ||
2432 | r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !is_root_slice); | |
0219b352 DB |
2433 | if (r < 0) |
2434 | /* One reason we could have failed here is, that the cgroup still contains a process. | |
2435 | * However, if the cgroup becomes removable at a later time, it might be removed when | |
2436 | * the containing slice is stopped. So even if we failed now, this unit shouldn't assume | |
2437 | * that the cgroup is still realized the next time it is started. Do not return early | |
2438 | * on error, continue cleanup. */ | |
2439 | log_unit_full(u, r == -EBUSY ? LOG_DEBUG : LOG_WARNING, r, "Failed to destroy cgroup %s, ignoring: %m", u->cgroup_path); | |
8e274523 | 2440 | |
efdb0237 LP |
2441 | if (is_root_slice) |
2442 | return; | |
2443 | ||
2444 | unit_release_cgroup(u); | |
0a1eb06d | 2445 | |
4ad49000 | 2446 | u->cgroup_realized = false; |
bc432dc7 | 2447 | u->cgroup_realized_mask = 0; |
ccf78df1 | 2448 | u->cgroup_enabled_mask = 0; |
084c7007 RG |
2449 | |
2450 | u->bpf_device_control_installed = bpf_program_unref(u->bpf_device_control_installed); | |
8e274523 LP |
2451 | } |
2452 | ||
efdb0237 | 2453 | int unit_search_main_pid(Unit *u, pid_t *ret) { |
4ad49000 | 2454 | _cleanup_fclose_ FILE *f = NULL; |
4d051546 | 2455 | pid_t pid = 0, npid; |
efdb0237 | 2456 | int r; |
4ad49000 LP |
2457 | |
2458 | assert(u); | |
efdb0237 | 2459 | assert(ret); |
4ad49000 LP |
2460 | |
2461 | if (!u->cgroup_path) | |
efdb0237 | 2462 | return -ENXIO; |
4ad49000 | 2463 | |
efdb0237 LP |
2464 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &f); |
2465 | if (r < 0) | |
2466 | return r; | |
4ad49000 | 2467 | |
4ad49000 | 2468 | while (cg_read_pid(f, &npid) > 0) { |
4ad49000 LP |
2469 | |
2470 | if (npid == pid) | |
2471 | continue; | |
8e274523 | 2472 | |
4d051546 | 2473 | if (pid_is_my_child(npid) == 0) |
4ad49000 | 2474 | continue; |
8e274523 | 2475 | |
efdb0237 | 2476 | if (pid != 0) |
4ad49000 LP |
2477 | /* Dang, there's more than one daemonized PID |
2478 | in this group, so we don't know what process | |
2479 | is the main process. */ | |
efdb0237 LP |
2480 | |
2481 | return -ENODATA; | |
8e274523 | 2482 | |
4ad49000 | 2483 | pid = npid; |
8e274523 LP |
2484 | } |
2485 | ||
efdb0237 LP |
2486 | *ret = pid; |
2487 | return 0; | |
2488 | } | |
2489 | ||
2490 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
b3c5bad3 | 2491 | _cleanup_closedir_ DIR *d = NULL; |
efdb0237 LP |
2492 | _cleanup_fclose_ FILE *f = NULL; |
2493 | int ret = 0, r; | |
2494 | ||
2495 | assert(u); | |
2496 | assert(path); | |
2497 | ||
2498 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2499 | if (r < 0) | |
2500 | ret = r; | |
2501 | else { | |
2502 | pid_t pid; | |
2503 | ||
2504 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
f75f613d | 2505 | r = unit_watch_pid(u, pid, false); |
efdb0237 LP |
2506 | if (r < 0 && ret >= 0) |
2507 | ret = r; | |
2508 | } | |
2509 | ||
2510 | if (r < 0 && ret >= 0) | |
2511 | ret = r; | |
2512 | } | |
2513 | ||
2514 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2515 | if (r < 0) { | |
2516 | if (ret >= 0) | |
2517 | ret = r; | |
2518 | } else { | |
2519 | char *fn; | |
2520 | ||
2521 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2522 | _cleanup_free_ char *p = NULL; | |
2523 | ||
95b21cff | 2524 | p = path_join(empty_to_root(path), fn); |
efdb0237 LP |
2525 | free(fn); |
2526 | ||
2527 | if (!p) | |
2528 | return -ENOMEM; | |
2529 | ||
2530 | r = unit_watch_pids_in_path(u, p); | |
2531 | if (r < 0 && ret >= 0) | |
2532 | ret = r; | |
2533 | } | |
2534 | ||
2535 | if (r < 0 && ret >= 0) | |
2536 | ret = r; | |
2537 | } | |
2538 | ||
2539 | return ret; | |
2540 | } | |
2541 | ||
11aef522 LP |
2542 | int unit_synthesize_cgroup_empty_event(Unit *u) { |
2543 | int r; | |
2544 | ||
2545 | assert(u); | |
2546 | ||
2547 | /* Enqueue a synthetic cgroup empty event if this unit doesn't watch any PIDs anymore. This is compatibility | |
2548 | * support for non-unified systems where notifications aren't reliable, and hence need to take whatever we can | |
2549 | * get as notification source as soon as we stopped having any useful PIDs to watch for. */ | |
2550 | ||
2551 | if (!u->cgroup_path) | |
2552 | return -ENOENT; | |
2553 | ||
2554 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2555 | if (r < 0) | |
2556 | return r; | |
2557 | if (r > 0) /* On unified we have reliable notifications, and don't need this */ | |
2558 | return 0; | |
2559 | ||
2560 | if (!set_isempty(u->pids)) | |
2561 | return 0; | |
2562 | ||
2563 | unit_add_to_cgroup_empty_queue(u); | |
2564 | return 0; | |
2565 | } | |
2566 | ||
efdb0237 | 2567 | int unit_watch_all_pids(Unit *u) { |
b4cccbc1 LP |
2568 | int r; |
2569 | ||
efdb0237 LP |
2570 | assert(u); |
2571 | ||
2572 | /* Adds all PIDs from our cgroup to the set of PIDs we | |
2573 | * watch. This is a fallback logic for cases where we do not | |
2574 | * get reliable cgroup empty notifications: we try to use | |
2575 | * SIGCHLD as replacement. */ | |
2576 | ||
2577 | if (!u->cgroup_path) | |
2578 | return -ENOENT; | |
2579 | ||
c22800e4 | 2580 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); |
b4cccbc1 LP |
2581 | if (r < 0) |
2582 | return r; | |
2583 | if (r > 0) /* On unified we can use proper notifications */ | |
efdb0237 LP |
2584 | return 0; |
2585 | ||
2586 | return unit_watch_pids_in_path(u, u->cgroup_path); | |
2587 | } | |
2588 | ||
09e24654 LP |
2589 | static int on_cgroup_empty_event(sd_event_source *s, void *userdata) { |
2590 | Manager *m = userdata; | |
2591 | Unit *u; | |
efdb0237 LP |
2592 | int r; |
2593 | ||
09e24654 LP |
2594 | assert(s); |
2595 | assert(m); | |
efdb0237 | 2596 | |
09e24654 LP |
2597 | u = m->cgroup_empty_queue; |
2598 | if (!u) | |
efdb0237 LP |
2599 | return 0; |
2600 | ||
09e24654 LP |
2601 | assert(u->in_cgroup_empty_queue); |
2602 | u->in_cgroup_empty_queue = false; | |
2603 | LIST_REMOVE(cgroup_empty_queue, m->cgroup_empty_queue, u); | |
2604 | ||
2605 | if (m->cgroup_empty_queue) { | |
2606 | /* More stuff queued, let's make sure we remain enabled */ | |
2607 | r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); | |
2608 | if (r < 0) | |
19a691a9 | 2609 | log_debug_errno(r, "Failed to reenable cgroup empty event source, ignoring: %m"); |
09e24654 | 2610 | } |
efdb0237 LP |
2611 | |
2612 | unit_add_to_gc_queue(u); | |
2613 | ||
2614 | if (UNIT_VTABLE(u)->notify_cgroup_empty) | |
2615 | UNIT_VTABLE(u)->notify_cgroup_empty(u); | |
2616 | ||
2617 | return 0; | |
2618 | } | |
2619 | ||
09e24654 LP |
2620 | void unit_add_to_cgroup_empty_queue(Unit *u) { |
2621 | int r; | |
2622 | ||
2623 | assert(u); | |
2624 | ||
2625 | /* Note that there are four different ways how cgroup empty events reach us: | |
2626 | * | |
2627 | * 1. On the unified hierarchy we get an inotify event on the cgroup | |
2628 | * | |
2629 | * 2. On the legacy hierarchy, when running in system mode, we get a datagram on the cgroup agent socket | |
2630 | * | |
2631 | * 3. On the legacy hierarchy, when running in user mode, we get a D-Bus signal on the system bus | |
2632 | * | |
2633 | * 4. On the legacy hierarchy, in service units we start watching all processes of the cgroup for SIGCHLD as | |
2634 | * soon as we get one SIGCHLD, to deal with unreliable cgroup notifications. | |
2635 | * | |
2636 | * Regardless which way we got the notification, we'll verify it here, and then add it to a separate | |
2637 | * queue. This queue will be dispatched at a lower priority than the SIGCHLD handler, so that we always use | |
2638 | * SIGCHLD if we can get it first, and only use the cgroup empty notifications if there's no SIGCHLD pending | |
2639 | * (which might happen if the cgroup doesn't contain processes that are our own child, which is typically the | |
2640 | * case for scope units). */ | |
2641 | ||
2642 | if (u->in_cgroup_empty_queue) | |
2643 | return; | |
2644 | ||
2645 | /* Let's verify that the cgroup is really empty */ | |
2646 | if (!u->cgroup_path) | |
2647 | return; | |
e1e98911 | 2648 | |
09e24654 LP |
2649 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); |
2650 | if (r < 0) { | |
2651 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
2652 | return; | |
2653 | } | |
2654 | if (r == 0) | |
2655 | return; | |
2656 | ||
2657 | LIST_PREPEND(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
2658 | u->in_cgroup_empty_queue = true; | |
2659 | ||
2660 | /* Trigger the defer event */ | |
2661 | r = sd_event_source_set_enabled(u->manager->cgroup_empty_event_source, SD_EVENT_ONESHOT); | |
2662 | if (r < 0) | |
2663 | log_debug_errno(r, "Failed to enable cgroup empty event source: %m"); | |
2664 | } | |
2665 | ||
d9e45bc3 MS |
2666 | static void unit_remove_from_cgroup_empty_queue(Unit *u) { |
2667 | assert(u); | |
2668 | ||
2669 | if (!u->in_cgroup_empty_queue) | |
2670 | return; | |
2671 | ||
2672 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
2673 | u->in_cgroup_empty_queue = false; | |
2674 | } | |
2675 | ||
2ba6ae6b | 2676 | int unit_check_oom(Unit *u) { |
afcfaa69 LP |
2677 | _cleanup_free_ char *oom_kill = NULL; |
2678 | bool increased; | |
2679 | uint64_t c; | |
2680 | int r; | |
2681 | ||
2682 | if (!u->cgroup_path) | |
2683 | return 0; | |
2684 | ||
2685 | r = cg_get_keyed_attribute("memory", u->cgroup_path, "memory.events", STRV_MAKE("oom_kill"), &oom_kill); | |
2686 | if (r < 0) | |
2687 | return log_unit_debug_errno(u, r, "Failed to read oom_kill field of memory.events cgroup attribute: %m"); | |
2688 | ||
2689 | r = safe_atou64(oom_kill, &c); | |
2690 | if (r < 0) | |
2691 | return log_unit_debug_errno(u, r, "Failed to parse oom_kill field: %m"); | |
2692 | ||
2693 | increased = c > u->oom_kill_last; | |
2694 | u->oom_kill_last = c; | |
2695 | ||
2696 | if (!increased) | |
2697 | return 0; | |
2698 | ||
2699 | log_struct(LOG_NOTICE, | |
2700 | "MESSAGE_ID=" SD_MESSAGE_UNIT_OUT_OF_MEMORY_STR, | |
2701 | LOG_UNIT_ID(u), | |
2702 | LOG_UNIT_INVOCATION_ID(u), | |
2703 | LOG_UNIT_MESSAGE(u, "A process of this unit has been killed by the OOM killer.")); | |
2704 | ||
2705 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
2706 | UNIT_VTABLE(u)->notify_cgroup_oom(u); | |
2707 | ||
2708 | return 1; | |
2709 | } | |
2710 | ||
2711 | static int on_cgroup_oom_event(sd_event_source *s, void *userdata) { | |
2712 | Manager *m = userdata; | |
2713 | Unit *u; | |
2714 | int r; | |
2715 | ||
2716 | assert(s); | |
2717 | assert(m); | |
2718 | ||
2719 | u = m->cgroup_oom_queue; | |
2720 | if (!u) | |
2721 | return 0; | |
2722 | ||
2723 | assert(u->in_cgroup_oom_queue); | |
2724 | u->in_cgroup_oom_queue = false; | |
2725 | LIST_REMOVE(cgroup_oom_queue, m->cgroup_oom_queue, u); | |
2726 | ||
2727 | if (m->cgroup_oom_queue) { | |
2728 | /* More stuff queued, let's make sure we remain enabled */ | |
2729 | r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); | |
2730 | if (r < 0) | |
2731 | log_debug_errno(r, "Failed to reenable cgroup oom event source, ignoring: %m"); | |
2732 | } | |
2733 | ||
2734 | (void) unit_check_oom(u); | |
2735 | return 0; | |
2736 | } | |
2737 | ||
2738 | static void unit_add_to_cgroup_oom_queue(Unit *u) { | |
2739 | int r; | |
2740 | ||
2741 | assert(u); | |
2742 | ||
2743 | if (u->in_cgroup_oom_queue) | |
2744 | return; | |
2745 | if (!u->cgroup_path) | |
2746 | return; | |
2747 | ||
2748 | LIST_PREPEND(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
2749 | u->in_cgroup_oom_queue = true; | |
2750 | ||
2751 | /* Trigger the defer event */ | |
2752 | if (!u->manager->cgroup_oom_event_source) { | |
2753 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2754 | ||
2755 | r = sd_event_add_defer(u->manager->event, &s, on_cgroup_oom_event, u->manager); | |
2756 | if (r < 0) { | |
2757 | log_error_errno(r, "Failed to create cgroup oom event source: %m"); | |
2758 | return; | |
2759 | } | |
2760 | ||
2761 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_NORMAL-8); | |
2762 | if (r < 0) { | |
2763 | log_error_errno(r, "Failed to set priority of cgroup oom event source: %m"); | |
2764 | return; | |
2765 | } | |
2766 | ||
2767 | (void) sd_event_source_set_description(s, "cgroup-oom"); | |
2768 | u->manager->cgroup_oom_event_source = TAKE_PTR(s); | |
2769 | } | |
2770 | ||
2771 | r = sd_event_source_set_enabled(u->manager->cgroup_oom_event_source, SD_EVENT_ONESHOT); | |
2772 | if (r < 0) | |
2773 | log_error_errno(r, "Failed to enable cgroup oom event source: %m"); | |
2774 | } | |
2775 | ||
d9e45bc3 MS |
2776 | static int unit_check_cgroup_events(Unit *u) { |
2777 | char *values[2] = {}; | |
2778 | int r; | |
2779 | ||
2780 | assert(u); | |
2781 | ||
2782 | r = cg_get_keyed_attribute_graceful(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
2783 | STRV_MAKE("populated", "frozen"), values); | |
2784 | if (r < 0) | |
2785 | return r; | |
2786 | ||
2787 | /* The cgroup.events notifications can be merged together so act as we saw the given state for the | |
2788 | * first time. The functions we call to handle given state are idempotent, which makes them | |
2789 | * effectively remember the previous state. */ | |
2790 | if (values[0]) { | |
2791 | if (streq(values[0], "1")) | |
2792 | unit_remove_from_cgroup_empty_queue(u); | |
2793 | else | |
2794 | unit_add_to_cgroup_empty_queue(u); | |
2795 | } | |
2796 | ||
2797 | /* Disregard freezer state changes due to operations not initiated by us */ | |
2798 | if (values[1] && IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) { | |
2799 | if (streq(values[1], "0")) | |
2800 | unit_thawed(u); | |
2801 | else | |
2802 | unit_frozen(u); | |
2803 | } | |
2804 | ||
2805 | free(values[0]); | |
2806 | free(values[1]); | |
2807 | ||
2808 | return 0; | |
2809 | } | |
2810 | ||
efdb0237 LP |
2811 | static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
2812 | Manager *m = userdata; | |
2813 | ||
2814 | assert(s); | |
2815 | assert(fd >= 0); | |
2816 | assert(m); | |
2817 | ||
2818 | for (;;) { | |
2819 | union inotify_event_buffer buffer; | |
2820 | struct inotify_event *e; | |
2821 | ssize_t l; | |
2822 | ||
2823 | l = read(fd, &buffer, sizeof(buffer)); | |
2824 | if (l < 0) { | |
47249640 | 2825 | if (IN_SET(errno, EINTR, EAGAIN)) |
efdb0237 LP |
2826 | return 0; |
2827 | ||
2828 | return log_error_errno(errno, "Failed to read control group inotify events: %m"); | |
2829 | } | |
2830 | ||
2831 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
2832 | Unit *u; | |
2833 | ||
2834 | if (e->wd < 0) | |
2835 | /* Queue overflow has no watch descriptor */ | |
2836 | continue; | |
2837 | ||
2838 | if (e->mask & IN_IGNORED) | |
2839 | /* The watch was just removed */ | |
2840 | continue; | |
2841 | ||
afcfaa69 LP |
2842 | /* Note that inotify might deliver events for a watch even after it was removed, |
2843 | * because it was queued before the removal. Let's ignore this here safely. */ | |
2844 | ||
0bb814c2 | 2845 | u = hashmap_get(m->cgroup_control_inotify_wd_unit, INT_TO_PTR(e->wd)); |
afcfaa69 | 2846 | if (u) |
d9e45bc3 | 2847 | unit_check_cgroup_events(u); |
efdb0237 | 2848 | |
afcfaa69 LP |
2849 | u = hashmap_get(m->cgroup_memory_inotify_wd_unit, INT_TO_PTR(e->wd)); |
2850 | if (u) | |
2851 | unit_add_to_cgroup_oom_queue(u); | |
efdb0237 LP |
2852 | } |
2853 | } | |
8e274523 LP |
2854 | } |
2855 | ||
17f14955 RG |
2856 | static int cg_bpf_mask_supported(CGroupMask *ret) { |
2857 | CGroupMask mask = 0; | |
2858 | int r; | |
2859 | ||
2860 | /* BPF-based firewall */ | |
2861 | r = bpf_firewall_supported(); | |
2862 | if (r > 0) | |
2863 | mask |= CGROUP_MASK_BPF_FIREWALL; | |
2864 | ||
084c7007 RG |
2865 | /* BPF-based device access control */ |
2866 | r = bpf_devices_supported(); | |
2867 | if (r > 0) | |
2868 | mask |= CGROUP_MASK_BPF_DEVICES; | |
2869 | ||
17f14955 RG |
2870 | *ret = mask; |
2871 | return 0; | |
2872 | } | |
2873 | ||
8e274523 | 2874 | int manager_setup_cgroup(Manager *m) { |
9444b1f2 | 2875 | _cleanup_free_ char *path = NULL; |
10bd3e2e | 2876 | const char *scope_path; |
efdb0237 | 2877 | CGroupController c; |
b4cccbc1 | 2878 | int r, all_unified; |
17f14955 | 2879 | CGroupMask mask; |
efdb0237 | 2880 | char *e; |
8e274523 LP |
2881 | |
2882 | assert(m); | |
2883 | ||
35d2e7ec | 2884 | /* 1. Determine hierarchy */ |
efdb0237 | 2885 | m->cgroup_root = mfree(m->cgroup_root); |
9444b1f2 | 2886 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &m->cgroup_root); |
23bbb0de MS |
2887 | if (r < 0) |
2888 | return log_error_errno(r, "Cannot determine cgroup we are running in: %m"); | |
8e274523 | 2889 | |
efdb0237 LP |
2890 | /* Chop off the init scope, if we are already located in it */ |
2891 | e = endswith(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); | |
0d8c31ff | 2892 | |
efdb0237 LP |
2893 | /* LEGACY: Also chop off the system slice if we are in |
2894 | * it. This is to support live upgrades from older systemd | |
2895 | * versions where PID 1 was moved there. Also see | |
2896 | * cg_get_root_path(). */ | |
463d0d15 | 2897 | if (!e && MANAGER_IS_SYSTEM(m)) { |
9444b1f2 | 2898 | e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE); |
15c60e99 | 2899 | if (!e) |
efdb0237 | 2900 | e = endswith(m->cgroup_root, "/system"); /* even more legacy */ |
0baf24dd | 2901 | } |
efdb0237 LP |
2902 | if (e) |
2903 | *e = 0; | |
7ccfb64a | 2904 | |
7546145e LP |
2905 | /* And make sure to store away the root value without trailing slash, even for the root dir, so that we can |
2906 | * easily prepend it everywhere. */ | |
2907 | delete_trailing_chars(m->cgroup_root, "/"); | |
8e274523 | 2908 | |
35d2e7ec | 2909 | /* 2. Show data */ |
9444b1f2 | 2910 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, NULL, &path); |
23bbb0de MS |
2911 | if (r < 0) |
2912 | return log_error_errno(r, "Cannot find cgroup mount point: %m"); | |
8e274523 | 2913 | |
d4d99bc6 | 2914 | r = cg_unified(); |
415fc41c TH |
2915 | if (r < 0) |
2916 | return log_error_errno(r, "Couldn't determine if we are running in the unified hierarchy: %m"); | |
5da38d07 | 2917 | |
b4cccbc1 | 2918 | all_unified = cg_all_unified(); |
d4c819ed ZJS |
2919 | if (all_unified < 0) |
2920 | return log_error_errno(all_unified, "Couldn't determine whether we are in all unified mode: %m"); | |
2921 | if (all_unified > 0) | |
efdb0237 | 2922 | log_debug("Unified cgroup hierarchy is located at %s.", path); |
b4cccbc1 | 2923 | else { |
c22800e4 | 2924 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); |
b4cccbc1 LP |
2925 | if (r < 0) |
2926 | return log_error_errno(r, "Failed to determine whether systemd's own controller is in unified mode: %m"); | |
2927 | if (r > 0) | |
2928 | log_debug("Unified cgroup hierarchy is located at %s. Controllers are on legacy hierarchies.", path); | |
2929 | else | |
2930 | log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER_LEGACY ". File system hierarchy is at %s.", path); | |
2931 | } | |
efdb0237 | 2932 | |
09e24654 LP |
2933 | /* 3. Allocate cgroup empty defer event source */ |
2934 | m->cgroup_empty_event_source = sd_event_source_unref(m->cgroup_empty_event_source); | |
2935 | r = sd_event_add_defer(m->event, &m->cgroup_empty_event_source, on_cgroup_empty_event, m); | |
2936 | if (r < 0) | |
2937 | return log_error_errno(r, "Failed to create cgroup empty event source: %m"); | |
2938 | ||
cbe83389 LP |
2939 | /* Schedule cgroup empty checks early, but after having processed service notification messages or |
2940 | * SIGCHLD signals, so that a cgroup running empty is always just the last safety net of | |
2941 | * notification, and we collected the metadata the notification and SIGCHLD stuff offers first. */ | |
09e24654 LP |
2942 | r = sd_event_source_set_priority(m->cgroup_empty_event_source, SD_EVENT_PRIORITY_NORMAL-5); |
2943 | if (r < 0) | |
2944 | return log_error_errno(r, "Failed to set priority of cgroup empty event source: %m"); | |
2945 | ||
2946 | r = sd_event_source_set_enabled(m->cgroup_empty_event_source, SD_EVENT_OFF); | |
2947 | if (r < 0) | |
2948 | return log_error_errno(r, "Failed to disable cgroup empty event source: %m"); | |
2949 | ||
2950 | (void) sd_event_source_set_description(m->cgroup_empty_event_source, "cgroup-empty"); | |
2951 | ||
2952 | /* 4. Install notifier inotify object, or agent */ | |
10bd3e2e | 2953 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0) { |
c6c18be3 | 2954 | |
09e24654 | 2955 | /* In the unified hierarchy we can get cgroup empty notifications via inotify. */ |
efdb0237 | 2956 | |
10bd3e2e LP |
2957 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); |
2958 | safe_close(m->cgroup_inotify_fd); | |
efdb0237 | 2959 | |
10bd3e2e LP |
2960 | m->cgroup_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); |
2961 | if (m->cgroup_inotify_fd < 0) | |
2962 | return log_error_errno(errno, "Failed to create control group inotify object: %m"); | |
efdb0237 | 2963 | |
10bd3e2e LP |
2964 | r = sd_event_add_io(m->event, &m->cgroup_inotify_event_source, m->cgroup_inotify_fd, EPOLLIN, on_cgroup_inotify_event, m); |
2965 | if (r < 0) | |
2966 | return log_error_errno(r, "Failed to watch control group inotify object: %m"); | |
efdb0237 | 2967 | |
cbe83389 LP |
2968 | /* Process cgroup empty notifications early. Note that when this event is dispatched it'll |
2969 | * just add the unit to a cgroup empty queue, hence let's run earlier than that. Also see | |
2970 | * handling of cgroup agent notifications, for the classic cgroup hierarchy support. */ | |
2971 | r = sd_event_source_set_priority(m->cgroup_inotify_event_source, SD_EVENT_PRIORITY_NORMAL-9); | |
10bd3e2e LP |
2972 | if (r < 0) |
2973 | return log_error_errno(r, "Failed to set priority of inotify event source: %m"); | |
efdb0237 | 2974 | |
10bd3e2e | 2975 | (void) sd_event_source_set_description(m->cgroup_inotify_event_source, "cgroup-inotify"); |
efdb0237 | 2976 | |
611c4f8a | 2977 | } else if (MANAGER_IS_SYSTEM(m) && manager_owns_host_root_cgroup(m) && !MANAGER_IS_TEST_RUN(m)) { |
efdb0237 | 2978 | |
10bd3e2e LP |
2979 | /* On the legacy hierarchy we only get notifications via cgroup agents. (Which isn't really reliable, |
2980 | * since it does not generate events when control groups with children run empty. */ | |
8e274523 | 2981 | |
10bd3e2e | 2982 | r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH); |
23bbb0de | 2983 | if (r < 0) |
10bd3e2e LP |
2984 | log_warning_errno(r, "Failed to install release agent, ignoring: %m"); |
2985 | else if (r > 0) | |
2986 | log_debug("Installed release agent."); | |
2987 | else if (r == 0) | |
2988 | log_debug("Release agent already installed."); | |
2989 | } | |
efdb0237 | 2990 | |
09e24654 | 2991 | /* 5. Make sure we are in the special "init.scope" unit in the root slice. */ |
10bd3e2e LP |
2992 | scope_path = strjoina(m->cgroup_root, "/" SPECIAL_INIT_SCOPE); |
2993 | r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); | |
aa77e234 MS |
2994 | if (r >= 0) { |
2995 | /* Also, move all other userspace processes remaining in the root cgroup into that scope. */ | |
2996 | r = cg_migrate(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, SYSTEMD_CGROUP_CONTROLLER, scope_path, 0); | |
2997 | if (r < 0) | |
2998 | log_warning_errno(r, "Couldn't move remaining userspace processes, ignoring: %m"); | |
c6c18be3 | 2999 | |
aa77e234 MS |
3000 | /* 6. And pin it, so that it cannot be unmounted */ |
3001 | safe_close(m->pin_cgroupfs_fd); | |
3002 | m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK); | |
3003 | if (m->pin_cgroupfs_fd < 0) | |
3004 | return log_error_errno(errno, "Failed to open pin file: %m"); | |
0d8c31ff | 3005 | |
638cece4 | 3006 | } else if (!MANAGER_IS_TEST_RUN(m)) |
aa77e234 | 3007 | return log_error_errno(r, "Failed to create %s control group: %m", scope_path); |
10bd3e2e | 3008 | |
09e24654 | 3009 | /* 7. Always enable hierarchical support if it exists... */ |
638cece4 | 3010 | if (!all_unified && !MANAGER_IS_TEST_RUN(m)) |
10bd3e2e | 3011 | (void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1"); |
c6c18be3 | 3012 | |
17f14955 | 3013 | /* 8. Figure out which controllers are supported */ |
efdb0237 LP |
3014 | r = cg_mask_supported(&m->cgroup_supported); |
3015 | if (r < 0) | |
3016 | return log_error_errno(r, "Failed to determine supported controllers: %m"); | |
17f14955 RG |
3017 | |
3018 | /* 9. Figure out which bpf-based pseudo-controllers are supported */ | |
3019 | r = cg_bpf_mask_supported(&mask); | |
3020 | if (r < 0) | |
3021 | return log_error_errno(r, "Failed to determine supported bpf-based pseudo-controllers: %m"); | |
3022 | m->cgroup_supported |= mask; | |
3023 | ||
3024 | /* 10. Log which controllers are supported */ | |
efdb0237 | 3025 | for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) |
eee0a1e4 | 3026 | log_debug("Controller '%s' supported: %s", cgroup_controller_to_string(c), yes_no(m->cgroup_supported & CGROUP_CONTROLLER_TO_MASK(c))); |
9156e799 | 3027 | |
a32360f1 | 3028 | return 0; |
8e274523 LP |
3029 | } |
3030 | ||
c6c18be3 | 3031 | void manager_shutdown_cgroup(Manager *m, bool delete) { |
8e274523 LP |
3032 | assert(m); |
3033 | ||
9444b1f2 LP |
3034 | /* We can't really delete the group, since we are in it. But |
3035 | * let's trim it. */ | |
f6c63f6f | 3036 | if (delete && m->cgroup_root && m->test_run_flags != MANAGER_TEST_RUN_MINIMAL) |
efdb0237 LP |
3037 | (void) cg_trim(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, false); |
3038 | ||
09e24654 LP |
3039 | m->cgroup_empty_event_source = sd_event_source_unref(m->cgroup_empty_event_source); |
3040 | ||
0bb814c2 | 3041 | m->cgroup_control_inotify_wd_unit = hashmap_free(m->cgroup_control_inotify_wd_unit); |
afcfaa69 | 3042 | m->cgroup_memory_inotify_wd_unit = hashmap_free(m->cgroup_memory_inotify_wd_unit); |
efdb0237 LP |
3043 | |
3044 | m->cgroup_inotify_event_source = sd_event_source_unref(m->cgroup_inotify_event_source); | |
3045 | m->cgroup_inotify_fd = safe_close(m->cgroup_inotify_fd); | |
8e274523 | 3046 | |
03e334a1 | 3047 | m->pin_cgroupfs_fd = safe_close(m->pin_cgroupfs_fd); |
c6c18be3 | 3048 | |
efdb0237 | 3049 | m->cgroup_root = mfree(m->cgroup_root); |
8e274523 LP |
3050 | } |
3051 | ||
4ad49000 | 3052 | Unit* manager_get_unit_by_cgroup(Manager *m, const char *cgroup) { |
acb14d31 | 3053 | char *p; |
4ad49000 | 3054 | Unit *u; |
acb14d31 LP |
3055 | |
3056 | assert(m); | |
3057 | assert(cgroup); | |
acb14d31 | 3058 | |
4ad49000 LP |
3059 | u = hashmap_get(m->cgroup_unit, cgroup); |
3060 | if (u) | |
3061 | return u; | |
acb14d31 | 3062 | |
8e70580b | 3063 | p = strdupa(cgroup); |
acb14d31 LP |
3064 | for (;;) { |
3065 | char *e; | |
3066 | ||
3067 | e = strrchr(p, '/'); | |
efdb0237 LP |
3068 | if (!e || e == p) |
3069 | return hashmap_get(m->cgroup_unit, SPECIAL_ROOT_SLICE); | |
acb14d31 LP |
3070 | |
3071 | *e = 0; | |
3072 | ||
4ad49000 LP |
3073 | u = hashmap_get(m->cgroup_unit, p); |
3074 | if (u) | |
3075 | return u; | |
acb14d31 LP |
3076 | } |
3077 | } | |
3078 | ||
b3ac818b | 3079 | Unit *manager_get_unit_by_pid_cgroup(Manager *m, pid_t pid) { |
4ad49000 | 3080 | _cleanup_free_ char *cgroup = NULL; |
8e274523 | 3081 | |
8c47c732 LP |
3082 | assert(m); |
3083 | ||
62a76913 | 3084 | if (!pid_is_valid(pid)) |
b3ac818b LP |
3085 | return NULL; |
3086 | ||
62a76913 | 3087 | if (cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &cgroup) < 0) |
b3ac818b LP |
3088 | return NULL; |
3089 | ||
3090 | return manager_get_unit_by_cgroup(m, cgroup); | |
3091 | } | |
3092 | ||
3093 | Unit *manager_get_unit_by_pid(Manager *m, pid_t pid) { | |
62a76913 | 3094 | Unit *u, **array; |
b3ac818b LP |
3095 | |
3096 | assert(m); | |
3097 | ||
62a76913 LP |
3098 | /* Note that a process might be owned by multiple units, we return only one here, which is good enough for most |
3099 | * cases, though not strictly correct. We prefer the one reported by cgroup membership, as that's the most | |
3100 | * relevant one as children of the process will be assigned to that one, too, before all else. */ | |
3101 | ||
3102 | if (!pid_is_valid(pid)) | |
8c47c732 LP |
3103 | return NULL; |
3104 | ||
2ca9d979 | 3105 | if (pid == getpid_cached()) |
efdb0237 LP |
3106 | return hashmap_get(m->units, SPECIAL_INIT_SCOPE); |
3107 | ||
62a76913 | 3108 | u = manager_get_unit_by_pid_cgroup(m, pid); |
5fe8876b LP |
3109 | if (u) |
3110 | return u; | |
3111 | ||
62a76913 | 3112 | u = hashmap_get(m->watch_pids, PID_TO_PTR(pid)); |
5fe8876b LP |
3113 | if (u) |
3114 | return u; | |
3115 | ||
62a76913 LP |
3116 | array = hashmap_get(m->watch_pids, PID_TO_PTR(-pid)); |
3117 | if (array) | |
3118 | return array[0]; | |
3119 | ||
3120 | return NULL; | |
6dde1f33 | 3121 | } |
4fbf50b3 | 3122 | |
4ad49000 LP |
3123 | int manager_notify_cgroup_empty(Manager *m, const char *cgroup) { |
3124 | Unit *u; | |
4fbf50b3 | 3125 | |
4ad49000 LP |
3126 | assert(m); |
3127 | assert(cgroup); | |
4fbf50b3 | 3128 | |
09e24654 LP |
3129 | /* Called on the legacy hierarchy whenever we get an explicit cgroup notification from the cgroup agent process |
3130 | * or from the --system instance */ | |
3131 | ||
d8fdc620 LP |
3132 | log_debug("Got cgroup empty notification for: %s", cgroup); |
3133 | ||
4ad49000 | 3134 | u = manager_get_unit_by_cgroup(m, cgroup); |
5ad096b3 LP |
3135 | if (!u) |
3136 | return 0; | |
b56c28c3 | 3137 | |
09e24654 LP |
3138 | unit_add_to_cgroup_empty_queue(u); |
3139 | return 1; | |
5ad096b3 LP |
3140 | } |
3141 | ||
3142 | int unit_get_memory_current(Unit *u, uint64_t *ret) { | |
5ad096b3 LP |
3143 | int r; |
3144 | ||
3145 | assert(u); | |
3146 | assert(ret); | |
3147 | ||
2e4025c0 | 3148 | if (!UNIT_CGROUP_BOOL(u, memory_accounting)) |
cf3b4be1 LP |
3149 | return -ENODATA; |
3150 | ||
5ad096b3 LP |
3151 | if (!u->cgroup_path) |
3152 | return -ENODATA; | |
3153 | ||
1f73aa00 | 3154 | /* The root cgroup doesn't expose this information, let's get it from /proc instead */ |
611c4f8a | 3155 | if (unit_has_host_root_cgroup(u)) |
c482724a | 3156 | return procfs_memory_get_used(ret); |
1f73aa00 | 3157 | |
efdb0237 | 3158 | if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0) |
5ad096b3 LP |
3159 | return -ENODATA; |
3160 | ||
b4cccbc1 LP |
3161 | r = cg_all_unified(); |
3162 | if (r < 0) | |
3163 | return r; | |
5ad096b3 | 3164 | |
613328c3 | 3165 | return cg_get_attribute_as_uint64("memory", u->cgroup_path, r > 0 ? "memory.current" : "memory.usage_in_bytes", ret); |
5ad096b3 LP |
3166 | } |
3167 | ||
03a7b521 | 3168 | int unit_get_tasks_current(Unit *u, uint64_t *ret) { |
03a7b521 LP |
3169 | assert(u); |
3170 | assert(ret); | |
3171 | ||
2e4025c0 | 3172 | if (!UNIT_CGROUP_BOOL(u, tasks_accounting)) |
cf3b4be1 LP |
3173 | return -ENODATA; |
3174 | ||
03a7b521 LP |
3175 | if (!u->cgroup_path) |
3176 | return -ENODATA; | |
3177 | ||
c36a69f4 | 3178 | /* The root cgroup doesn't expose this information, let's get it from /proc instead */ |
611c4f8a | 3179 | if (unit_has_host_root_cgroup(u)) |
c36a69f4 LP |
3180 | return procfs_tasks_get_current(ret); |
3181 | ||
1f73aa00 LP |
3182 | if ((u->cgroup_realized_mask & CGROUP_MASK_PIDS) == 0) |
3183 | return -ENODATA; | |
3184 | ||
613328c3 | 3185 | return cg_get_attribute_as_uint64("pids", u->cgroup_path, "pids.current", ret); |
03a7b521 LP |
3186 | } |
3187 | ||
5ad096b3 | 3188 | static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) { |
5ad096b3 LP |
3189 | uint64_t ns; |
3190 | int r; | |
3191 | ||
3192 | assert(u); | |
3193 | assert(ret); | |
3194 | ||
3195 | if (!u->cgroup_path) | |
3196 | return -ENODATA; | |
3197 | ||
1f73aa00 | 3198 | /* The root cgroup doesn't expose this information, let's get it from /proc instead */ |
611c4f8a | 3199 | if (unit_has_host_root_cgroup(u)) |
1f73aa00 LP |
3200 | return procfs_cpu_get_usage(ret); |
3201 | ||
f98c2585 CD |
3202 | /* Requisite controllers for CPU accounting are not enabled */ |
3203 | if ((get_cpu_accounting_mask() & ~u->cgroup_realized_mask) != 0) | |
3204 | return -ENODATA; | |
3205 | ||
92a99304 LP |
3206 | r = cg_all_unified(); |
3207 | if (r < 0) | |
3208 | return r; | |
b4cccbc1 | 3209 | if (r > 0) { |
66ebf6c0 TH |
3210 | _cleanup_free_ char *val = NULL; |
3211 | uint64_t us; | |
5ad096b3 | 3212 | |
b734a4ff | 3213 | r = cg_get_keyed_attribute("cpu", u->cgroup_path, "cpu.stat", STRV_MAKE("usage_usec"), &val); |
b734a4ff LP |
3214 | if (IN_SET(r, -ENOENT, -ENXIO)) |
3215 | return -ENODATA; | |
d742f4b5 LP |
3216 | if (r < 0) |
3217 | return r; | |
66ebf6c0 TH |
3218 | |
3219 | r = safe_atou64(val, &us); | |
3220 | if (r < 0) | |
3221 | return r; | |
3222 | ||
3223 | ns = us * NSEC_PER_USEC; | |
613328c3 AZ |
3224 | } else |
3225 | return cg_get_attribute_as_uint64("cpuacct", u->cgroup_path, "cpuacct.usage", ret); | |
5ad096b3 LP |
3226 | |
3227 | *ret = ns; | |
3228 | return 0; | |
3229 | } | |
3230 | ||
3231 | int unit_get_cpu_usage(Unit *u, nsec_t *ret) { | |
3232 | nsec_t ns; | |
3233 | int r; | |
3234 | ||
fe700f46 LP |
3235 | assert(u); |
3236 | ||
3237 | /* Retrieve the current CPU usage counter. This will subtract the CPU counter taken when the unit was | |
3238 | * started. If the cgroup has been removed already, returns the last cached value. To cache the value, simply | |
3239 | * call this function with a NULL return value. */ | |
3240 | ||
2e4025c0 | 3241 | if (!UNIT_CGROUP_BOOL(u, cpu_accounting)) |
cf3b4be1 LP |
3242 | return -ENODATA; |
3243 | ||
5ad096b3 | 3244 | r = unit_get_cpu_usage_raw(u, &ns); |
fe700f46 LP |
3245 | if (r == -ENODATA && u->cpu_usage_last != NSEC_INFINITY) { |
3246 | /* If we can't get the CPU usage anymore (because the cgroup was already removed, for example), use our | |
3247 | * cached value. */ | |
3248 | ||
3249 | if (ret) | |
3250 | *ret = u->cpu_usage_last; | |
3251 | return 0; | |
3252 | } | |
5ad096b3 LP |
3253 | if (r < 0) |
3254 | return r; | |
3255 | ||
66ebf6c0 TH |
3256 | if (ns > u->cpu_usage_base) |
3257 | ns -= u->cpu_usage_base; | |
5ad096b3 LP |
3258 | else |
3259 | ns = 0; | |
3260 | ||
fe700f46 LP |
3261 | u->cpu_usage_last = ns; |
3262 | if (ret) | |
3263 | *ret = ns; | |
3264 | ||
5ad096b3 LP |
3265 | return 0; |
3266 | } | |
3267 | ||
906c06f6 DM |
3268 | int unit_get_ip_accounting( |
3269 | Unit *u, | |
3270 | CGroupIPAccountingMetric metric, | |
3271 | uint64_t *ret) { | |
3272 | ||
6b659ed8 | 3273 | uint64_t value; |
906c06f6 DM |
3274 | int fd, r; |
3275 | ||
3276 | assert(u); | |
3277 | assert(metric >= 0); | |
3278 | assert(metric < _CGROUP_IP_ACCOUNTING_METRIC_MAX); | |
3279 | assert(ret); | |
3280 | ||
2e4025c0 | 3281 | if (!UNIT_CGROUP_BOOL(u, ip_accounting)) |
cf3b4be1 LP |
3282 | return -ENODATA; |
3283 | ||
906c06f6 DM |
3284 | fd = IN_SET(metric, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_INGRESS_PACKETS) ? |
3285 | u->ip_accounting_ingress_map_fd : | |
3286 | u->ip_accounting_egress_map_fd; | |
906c06f6 DM |
3287 | if (fd < 0) |
3288 | return -ENODATA; | |
3289 | ||
3290 | if (IN_SET(metric, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
6b659ed8 | 3291 | r = bpf_firewall_read_accounting(fd, &value, NULL); |
906c06f6 | 3292 | else |
6b659ed8 LP |
3293 | r = bpf_firewall_read_accounting(fd, NULL, &value); |
3294 | if (r < 0) | |
3295 | return r; | |
3296 | ||
3297 | /* Add in additional metrics from a previous runtime. Note that when reexecing/reloading the daemon we compile | |
3298 | * all BPF programs and maps anew, but serialize the old counters. When deserializing we store them in the | |
3299 | * ip_accounting_extra[] field, and add them in here transparently. */ | |
3300 | ||
3301 | *ret = value + u->ip_accounting_extra[metric]; | |
906c06f6 DM |
3302 | |
3303 | return r; | |
3304 | } | |
3305 | ||
fbe14fc9 LP |
3306 | static int unit_get_io_accounting_raw(Unit *u, uint64_t ret[static _CGROUP_IO_ACCOUNTING_METRIC_MAX]) { |
3307 | static const char *const field_names[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3308 | [CGROUP_IO_READ_BYTES] = "rbytes=", | |
3309 | [CGROUP_IO_WRITE_BYTES] = "wbytes=", | |
3310 | [CGROUP_IO_READ_OPERATIONS] = "rios=", | |
3311 | [CGROUP_IO_WRITE_OPERATIONS] = "wios=", | |
3312 | }; | |
3313 | uint64_t acc[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = {}; | |
3314 | _cleanup_free_ char *path = NULL; | |
3315 | _cleanup_fclose_ FILE *f = NULL; | |
3316 | int r; | |
3317 | ||
3318 | assert(u); | |
3319 | ||
3320 | if (!u->cgroup_path) | |
3321 | return -ENODATA; | |
3322 | ||
3323 | if (unit_has_host_root_cgroup(u)) | |
3324 | return -ENODATA; /* TODO: return useful data for the top-level cgroup */ | |
3325 | ||
3326 | r = cg_all_unified(); | |
3327 | if (r < 0) | |
3328 | return r; | |
3329 | if (r == 0) /* TODO: support cgroupv1 */ | |
3330 | return -ENODATA; | |
3331 | ||
3332 | if (!FLAGS_SET(u->cgroup_realized_mask, CGROUP_MASK_IO)) | |
3333 | return -ENODATA; | |
3334 | ||
3335 | r = cg_get_path("io", u->cgroup_path, "io.stat", &path); | |
3336 | if (r < 0) | |
3337 | return r; | |
3338 | ||
3339 | f = fopen(path, "re"); | |
3340 | if (!f) | |
3341 | return -errno; | |
3342 | ||
3343 | for (;;) { | |
3344 | _cleanup_free_ char *line = NULL; | |
3345 | const char *p; | |
3346 | ||
3347 | r = read_line(f, LONG_LINE_MAX, &line); | |
3348 | if (r < 0) | |
3349 | return r; | |
3350 | if (r == 0) | |
3351 | break; | |
3352 | ||
3353 | p = line; | |
3354 | p += strcspn(p, WHITESPACE); /* Skip over device major/minor */ | |
3355 | p += strspn(p, WHITESPACE); /* Skip over following whitespace */ | |
3356 | ||
3357 | for (;;) { | |
3358 | _cleanup_free_ char *word = NULL; | |
3359 | ||
3360 | r = extract_first_word(&p, &word, NULL, EXTRACT_RETAIN_ESCAPE); | |
3361 | if (r < 0) | |
3362 | return r; | |
3363 | if (r == 0) | |
3364 | break; | |
3365 | ||
3366 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) { | |
3367 | const char *x; | |
3368 | ||
3369 | x = startswith(word, field_names[i]); | |
3370 | if (x) { | |
3371 | uint64_t w; | |
3372 | ||
3373 | r = safe_atou64(x, &w); | |
3374 | if (r < 0) | |
3375 | return r; | |
3376 | ||
3377 | /* Sum up the stats of all devices */ | |
3378 | acc[i] += w; | |
3379 | break; | |
3380 | } | |
3381 | } | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | memcpy(ret, acc, sizeof(acc)); | |
3386 | return 0; | |
3387 | } | |
3388 | ||
3389 | int unit_get_io_accounting( | |
3390 | Unit *u, | |
3391 | CGroupIOAccountingMetric metric, | |
3392 | bool allow_cache, | |
3393 | uint64_t *ret) { | |
3394 | ||
3395 | uint64_t raw[_CGROUP_IO_ACCOUNTING_METRIC_MAX]; | |
3396 | int r; | |
3397 | ||
3398 | /* Retrieve an IO account parameter. This will subtract the counter when the unit was started. */ | |
3399 | ||
3400 | if (!UNIT_CGROUP_BOOL(u, io_accounting)) | |
3401 | return -ENODATA; | |
3402 | ||
3403 | if (allow_cache && u->io_accounting_last[metric] != UINT64_MAX) | |
3404 | goto done; | |
3405 | ||
3406 | r = unit_get_io_accounting_raw(u, raw); | |
3407 | if (r == -ENODATA && u->io_accounting_last[metric] != UINT64_MAX) | |
3408 | goto done; | |
3409 | if (r < 0) | |
3410 | return r; | |
3411 | ||
3412 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) { | |
3413 | /* Saturated subtraction */ | |
3414 | if (raw[i] > u->io_accounting_base[i]) | |
3415 | u->io_accounting_last[i] = raw[i] - u->io_accounting_base[i]; | |
3416 | else | |
3417 | u->io_accounting_last[i] = 0; | |
3418 | } | |
3419 | ||
3420 | done: | |
3421 | if (ret) | |
3422 | *ret = u->io_accounting_last[metric]; | |
3423 | ||
3424 | return 0; | |
3425 | } | |
3426 | ||
906c06f6 | 3427 | int unit_reset_cpu_accounting(Unit *u) { |
5ad096b3 LP |
3428 | int r; |
3429 | ||
3430 | assert(u); | |
3431 | ||
fe700f46 LP |
3432 | u->cpu_usage_last = NSEC_INFINITY; |
3433 | ||
0bbff7d6 | 3434 | r = unit_get_cpu_usage_raw(u, &u->cpu_usage_base); |
5ad096b3 | 3435 | if (r < 0) { |
66ebf6c0 | 3436 | u->cpu_usage_base = 0; |
5ad096b3 | 3437 | return r; |
b56c28c3 | 3438 | } |
2633eb83 | 3439 | |
4ad49000 | 3440 | return 0; |
4fbf50b3 LP |
3441 | } |
3442 | ||
906c06f6 DM |
3443 | int unit_reset_ip_accounting(Unit *u) { |
3444 | int r = 0, q = 0; | |
3445 | ||
3446 | assert(u); | |
3447 | ||
3448 | if (u->ip_accounting_ingress_map_fd >= 0) | |
3449 | r = bpf_firewall_reset_accounting(u->ip_accounting_ingress_map_fd); | |
3450 | ||
3451 | if (u->ip_accounting_egress_map_fd >= 0) | |
3452 | q = bpf_firewall_reset_accounting(u->ip_accounting_egress_map_fd); | |
3453 | ||
6b659ed8 LP |
3454 | zero(u->ip_accounting_extra); |
3455 | ||
906c06f6 DM |
3456 | return r < 0 ? r : q; |
3457 | } | |
3458 | ||
fbe14fc9 LP |
3459 | int unit_reset_io_accounting(Unit *u) { |
3460 | int r; | |
3461 | ||
3462 | assert(u); | |
3463 | ||
3464 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) | |
3465 | u->io_accounting_last[i] = UINT64_MAX; | |
3466 | ||
3467 | r = unit_get_io_accounting_raw(u, u->io_accounting_base); | |
3468 | if (r < 0) { | |
3469 | zero(u->io_accounting_base); | |
3470 | return r; | |
3471 | } | |
3472 | ||
3473 | return 0; | |
3474 | } | |
3475 | ||
9b2559a1 | 3476 | int unit_reset_accounting(Unit *u) { |
fbe14fc9 | 3477 | int r, q, v; |
9b2559a1 LP |
3478 | |
3479 | assert(u); | |
3480 | ||
3481 | r = unit_reset_cpu_accounting(u); | |
fbe14fc9 LP |
3482 | q = unit_reset_io_accounting(u); |
3483 | v = unit_reset_ip_accounting(u); | |
9b2559a1 | 3484 | |
fbe14fc9 | 3485 | return r < 0 ? r : q < 0 ? q : v; |
9b2559a1 LP |
3486 | } |
3487 | ||
e7ab4d1a LP |
3488 | void unit_invalidate_cgroup(Unit *u, CGroupMask m) { |
3489 | assert(u); | |
3490 | ||
3491 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3492 | return; | |
3493 | ||
3494 | if (m == 0) | |
3495 | return; | |
3496 | ||
538b4852 TH |
3497 | /* always invalidate compat pairs together */ |
3498 | if (m & (CGROUP_MASK_IO | CGROUP_MASK_BLKIO)) | |
3499 | m |= CGROUP_MASK_IO | CGROUP_MASK_BLKIO; | |
3500 | ||
7cce4fb7 LP |
3501 | if (m & (CGROUP_MASK_CPU | CGROUP_MASK_CPUACCT)) |
3502 | m |= CGROUP_MASK_CPU | CGROUP_MASK_CPUACCT; | |
3503 | ||
e00068e7 | 3504 | if (FLAGS_SET(u->cgroup_invalidated_mask, m)) /* NOP? */ |
e7ab4d1a LP |
3505 | return; |
3506 | ||
e00068e7 | 3507 | u->cgroup_invalidated_mask |= m; |
91a6073e | 3508 | unit_add_to_cgroup_realize_queue(u); |
e7ab4d1a LP |
3509 | } |
3510 | ||
906c06f6 DM |
3511 | void unit_invalidate_cgroup_bpf(Unit *u) { |
3512 | assert(u); | |
3513 | ||
3514 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3515 | return; | |
3516 | ||
17f14955 | 3517 | if (u->cgroup_invalidated_mask & CGROUP_MASK_BPF_FIREWALL) /* NOP? */ |
906c06f6 DM |
3518 | return; |
3519 | ||
17f14955 | 3520 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
91a6073e | 3521 | unit_add_to_cgroup_realize_queue(u); |
906c06f6 DM |
3522 | |
3523 | /* If we are a slice unit, we also need to put compile a new BPF program for all our children, as the IP access | |
3524 | * list of our children includes our own. */ | |
3525 | if (u->type == UNIT_SLICE) { | |
3526 | Unit *member; | |
3527 | Iterator i; | |
eef85c4a | 3528 | void *v; |
906c06f6 | 3529 | |
95ae4d14 | 3530 | HASHMAP_FOREACH_KEY(v, member, u->dependencies[UNIT_BEFORE], i) |
cb5e3bc3 CD |
3531 | if (UNIT_DEREF(member->slice) == u) |
3532 | unit_invalidate_cgroup_bpf(member); | |
906c06f6 DM |
3533 | } |
3534 | } | |
3535 | ||
1d9cc876 LP |
3536 | bool unit_cgroup_delegate(Unit *u) { |
3537 | CGroupContext *c; | |
3538 | ||
3539 | assert(u); | |
3540 | ||
3541 | if (!UNIT_VTABLE(u)->can_delegate) | |
3542 | return false; | |
3543 | ||
3544 | c = unit_get_cgroup_context(u); | |
3545 | if (!c) | |
3546 | return false; | |
3547 | ||
3548 | return c->delegate; | |
3549 | } | |
3550 | ||
e7ab4d1a LP |
3551 | void manager_invalidate_startup_units(Manager *m) { |
3552 | Iterator i; | |
3553 | Unit *u; | |
3554 | ||
3555 | assert(m); | |
3556 | ||
3557 | SET_FOREACH(u, m->startup_units, i) | |
13c31542 | 3558 | unit_invalidate_cgroup(u, CGROUP_MASK_CPU|CGROUP_MASK_IO|CGROUP_MASK_BLKIO); |
e7ab4d1a LP |
3559 | } |
3560 | ||
da8e1782 MO |
3561 | static int unit_get_nice(Unit *u) { |
3562 | ExecContext *ec; | |
3563 | ||
3564 | ec = unit_get_exec_context(u); | |
3565 | return ec ? ec->nice : 0; | |
3566 | } | |
3567 | ||
3568 | static uint64_t unit_get_cpu_weight(Unit *u) { | |
3569 | ManagerState state = manager_state(u->manager); | |
3570 | CGroupContext *cc; | |
3571 | ||
3572 | cc = unit_get_cgroup_context(u); | |
3573 | return cc ? cgroup_context_cpu_weight(cc, state) : CGROUP_WEIGHT_DEFAULT; | |
3574 | } | |
3575 | ||
3576 | int compare_job_priority(const void *a, const void *b) { | |
3577 | const Job *x = a, *y = b; | |
3578 | int nice_x, nice_y; | |
3579 | uint64_t weight_x, weight_y; | |
3580 | int ret; | |
3581 | ||
217b7b33 ZJS |
3582 | if ((ret = CMP(x->unit->type, y->unit->type)) != 0) |
3583 | return -ret; | |
3584 | ||
da8e1782 MO |
3585 | weight_x = unit_get_cpu_weight(x->unit); |
3586 | weight_y = unit_get_cpu_weight(y->unit); | |
3587 | ||
217b7b33 ZJS |
3588 | if ((ret = CMP(weight_x, weight_y)) != 0) |
3589 | return -ret; | |
da8e1782 MO |
3590 | |
3591 | nice_x = unit_get_nice(x->unit); | |
3592 | nice_y = unit_get_nice(y->unit); | |
3593 | ||
3594 | if ((ret = CMP(nice_x, nice_y)) != 0) | |
3595 | return ret; | |
3596 | ||
da8e1782 MO |
3597 | return strcmp(x->unit->id, y->unit->id); |
3598 | } | |
3599 | ||
d9e45bc3 MS |
3600 | int unit_cgroup_freezer_action(Unit *u, FreezerAction action) { |
3601 | _cleanup_free_ char *path = NULL; | |
3602 | FreezerState target, kernel = _FREEZER_STATE_INVALID; | |
3603 | int r; | |
3604 | ||
3605 | assert(u); | |
3606 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
3607 | ||
3608 | if (!u->cgroup_realized) | |
3609 | return -EBUSY; | |
3610 | ||
3611 | target = action == FREEZER_FREEZE ? FREEZER_FROZEN : FREEZER_RUNNING; | |
3612 | ||
3613 | r = unit_freezer_state_kernel(u, &kernel); | |
3614 | if (r < 0) | |
3615 | log_unit_debug_errno(u, r, "Failed to obtain cgroup freezer state: %m"); | |
3616 | ||
3617 | if (target == kernel) { | |
3618 | u->freezer_state = target; | |
3619 | return 0; | |
3620 | } | |
3621 | ||
3622 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.freeze", &path); | |
3623 | if (r < 0) | |
3624 | return r; | |
3625 | ||
3626 | log_unit_debug(u, "%s unit.", action == FREEZER_FREEZE ? "Freezing" : "Thawing"); | |
3627 | ||
3628 | if (action == FREEZER_FREEZE) | |
3629 | u->freezer_state = FREEZER_FREEZING; | |
3630 | else | |
3631 | u->freezer_state = FREEZER_THAWING; | |
3632 | ||
3633 | r = write_string_file(path, one_zero(action == FREEZER_FREEZE), WRITE_STRING_FILE_DISABLE_BUFFER); | |
3634 | if (r < 0) | |
3635 | return r; | |
3636 | ||
d910f4c2 | 3637 | return 1; |
d9e45bc3 MS |
3638 | } |
3639 | ||
4ad49000 | 3640 | static const char* const cgroup_device_policy_table[_CGROUP_DEVICE_POLICY_MAX] = { |
084870f9 ZJS |
3641 | [CGROUP_DEVICE_POLICY_AUTO] = "auto", |
3642 | [CGROUP_DEVICE_POLICY_CLOSED] = "closed", | |
3643 | [CGROUP_DEVICE_POLICY_STRICT] = "strict", | |
4ad49000 | 3644 | }; |
4fbf50b3 | 3645 | |
047f5d63 PH |
3646 | int unit_get_cpuset(Unit *u, CPUSet *cpus, const char *name) { |
3647 | _cleanup_free_ char *v = NULL; | |
3648 | int r; | |
3649 | ||
3650 | assert(u); | |
3651 | assert(cpus); | |
3652 | ||
3653 | if (!u->cgroup_path) | |
3654 | return -ENODATA; | |
3655 | ||
3656 | if ((u->cgroup_realized_mask & CGROUP_MASK_CPUSET) == 0) | |
3657 | return -ENODATA; | |
3658 | ||
3659 | r = cg_all_unified(); | |
3660 | if (r < 0) | |
3661 | return r; | |
3662 | if (r == 0) | |
3663 | return -ENODATA; | |
48fd01e5 LP |
3664 | |
3665 | r = cg_get_attribute("cpuset", u->cgroup_path, name, &v); | |
047f5d63 PH |
3666 | if (r == -ENOENT) |
3667 | return -ENODATA; | |
3668 | if (r < 0) | |
3669 | return r; | |
3670 | ||
3671 | return parse_cpu_set_full(v, cpus, false, NULL, NULL, 0, NULL); | |
3672 | } | |
3673 | ||
4ad49000 | 3674 | DEFINE_STRING_TABLE_LOOKUP(cgroup_device_policy, CGroupDevicePolicy); |
d9e45bc3 MS |
3675 | |
3676 | static const char* const freezer_action_table[_FREEZER_ACTION_MAX] = { | |
3677 | [FREEZER_FREEZE] = "freeze", | |
3678 | [FREEZER_THAW] = "thaw", | |
3679 | }; | |
3680 | ||
3681 | DEFINE_STRING_TABLE_LOOKUP(freezer_action, FreezerAction); |