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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
19adb8a3 ZJS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Zbigniew Jędrzejewski-Szmek | |
c58493c0 | 6 | Copyright 2018 Dell Inc. |
19adb8a3 ZJS |
7 | ***/ |
8 | ||
a8fbdf54 | 9 | #include <errno.h> |
17c40b3a | 10 | #include <linux/fs.h> |
a8fbdf54 TA |
11 | #include <stdbool.h> |
12 | #include <stddef.h> | |
19adb8a3 | 13 | #include <stdio.h> |
a8fbdf54 TA |
14 | #include <string.h> |
15 | #include <syslog.h> | |
16 | #include <unistd.h> | |
19adb8a3 | 17 | |
b5efdb8a | 18 | #include "alloc-util.h" |
19adb8a3 | 19 | #include "conf-parser.h" |
a0f29c76 | 20 | #include "def.h" |
490d20e6 | 21 | #include "env-util.h" |
3ffd4af2 | 22 | #include "fd-util.h" |
19adb8a3 ZJS |
23 | #include "fileio.h" |
24 | #include "log.h" | |
a8fbdf54 | 25 | #include "macro.h" |
a0f29c76 | 26 | #include "parse-util.h" |
3ffd4af2 | 27 | #include "sleep-config.h" |
07630cea | 28 | #include "string-util.h" |
19adb8a3 | 29 | #include "strv.h" |
19adb8a3 | 30 | |
c58493c0 | 31 | int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t *_delay) { |
34c10968 | 32 | |
19adb8a3 ZJS |
33 | _cleanup_strv_free_ char |
34 | **suspend_mode = NULL, **suspend_state = NULL, | |
35 | **hibernate_mode = NULL, **hibernate_state = NULL, | |
36 | **hybrid_mode = NULL, **hybrid_state = NULL; | |
dabeaa46 | 37 | char **modes, **states; |
9aa2e409 | 38 | usec_t delay = 180 * USEC_PER_MINUTE; |
19adb8a3 ZJS |
39 | |
40 | const ConfigTableItem items[] = { | |
41 | { "Sleep", "SuspendMode", config_parse_strv, 0, &suspend_mode }, | |
42 | { "Sleep", "SuspendState", config_parse_strv, 0, &suspend_state }, | |
43 | { "Sleep", "HibernateMode", config_parse_strv, 0, &hibernate_mode }, | |
44 | { "Sleep", "HibernateState", config_parse_strv, 0, &hibernate_state }, | |
45 | { "Sleep", "HybridSleepMode", config_parse_strv, 0, &hybrid_mode }, | |
46 | { "Sleep", "HybridSleepState", config_parse_strv, 0, &hybrid_state }, | |
c58493c0 | 47 | { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &delay}, |
34c10968 LP |
48 | {} |
49 | }; | |
19adb8a3 | 50 | |
bcde742e LP |
51 | (void) config_parse_many_nulstr(PKGSYSCONFDIR "/sleep.conf", |
52 | CONF_PATHS_NULSTR("systemd/sleep.conf.d"), | |
53 | "Sleep\0", config_item_table_lookup, items, | |
54 | CONFIG_PARSE_WARN, NULL); | |
19adb8a3 | 55 | |
19adb8a3 ZJS |
56 | if (streq(verb, "suspend")) { |
57 | /* empty by default */ | |
2f4cefe6 | 58 | modes = TAKE_PTR(suspend_mode); |
19adb8a3 ZJS |
59 | |
60 | if (suspend_state) | |
2f4cefe6 | 61 | states = TAKE_PTR(suspend_state); |
19adb8a3 | 62 | else |
dabeaa46 | 63 | states = strv_new("mem", "standby", "freeze", NULL); |
19adb8a3 | 64 | |
19adb8a3 ZJS |
65 | } else if (streq(verb, "hibernate")) { |
66 | if (hibernate_mode) | |
2f4cefe6 | 67 | modes = TAKE_PTR(hibernate_mode); |
19adb8a3 | 68 | else |
dabeaa46 | 69 | modes = strv_new("platform", "shutdown", NULL); |
19adb8a3 ZJS |
70 | |
71 | if (hibernate_state) | |
2f4cefe6 | 72 | states = TAKE_PTR(hibernate_state); |
19adb8a3 | 73 | else |
dabeaa46 | 74 | states = strv_new("disk", NULL); |
19adb8a3 | 75 | |
19adb8a3 ZJS |
76 | } else if (streq(verb, "hybrid-sleep")) { |
77 | if (hybrid_mode) | |
2f4cefe6 | 78 | modes = TAKE_PTR(hybrid_mode); |
19adb8a3 | 79 | else |
dabeaa46 | 80 | modes = strv_new("suspend", "platform", "shutdown", NULL); |
19adb8a3 ZJS |
81 | |
82 | if (hybrid_state) | |
2f4cefe6 | 83 | states = TAKE_PTR(hybrid_state); |
19adb8a3 | 84 | else |
dabeaa46 | 85 | states = strv_new("disk", NULL); |
9aa2e409 | 86 | |
e68c79db | 87 | } else if (streq(verb, "suspend-then-hibernate")) |
9aa2e409 ZJS |
88 | modes = states = NULL; |
89 | else | |
19adb8a3 ZJS |
90 | assert_not_reached("what verb"); |
91 | ||
9aa2e409 | 92 | if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) || |
e68c79db | 93 | (!states && !streq(verb, "suspend-then-hibernate"))) { |
dabeaa46 ZJS |
94 | strv_free(modes); |
95 | strv_free(states); | |
19adb8a3 ZJS |
96 | return log_oom(); |
97 | } | |
98 | ||
c58493c0 ML |
99 | if (_modes) |
100 | *_modes = modes; | |
101 | if (_states) | |
102 | *_states = states; | |
103 | if (_delay) | |
104 | *_delay = delay; | |
105 | ||
19adb8a3 ZJS |
106 | return 0; |
107 | } | |
108 | ||
109 | int can_sleep_state(char **types) { | |
a2a5291b | 110 | char **type; |
19adb8a3 ZJS |
111 | int r; |
112 | _cleanup_free_ char *p = NULL; | |
113 | ||
114 | if (strv_isempty(types)) | |
115 | return true; | |
116 | ||
117 | /* If /sys is read-only we cannot sleep */ | |
118 | if (access("/sys/power/state", W_OK) < 0) | |
119 | return false; | |
120 | ||
121 | r = read_one_line_file("/sys/power/state", &p); | |
122 | if (r < 0) | |
123 | return false; | |
124 | ||
125 | STRV_FOREACH(type, types) { | |
a2a5291b | 126 | const char *word, *state; |
19adb8a3 ZJS |
127 | size_t l, k; |
128 | ||
129 | k = strlen(*type); | |
a2a5291b ZJS |
130 | FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) |
131 | if (l == k && memcmp(word, *type, l) == 0) | |
19adb8a3 ZJS |
132 | return true; |
133 | } | |
134 | ||
135 | return false; | |
136 | } | |
137 | ||
138 | int can_sleep_disk(char **types) { | |
a2a5291b | 139 | char **type; |
19adb8a3 ZJS |
140 | int r; |
141 | _cleanup_free_ char *p = NULL; | |
142 | ||
143 | if (strv_isempty(types)) | |
144 | return true; | |
145 | ||
146 | /* If /sys is read-only we cannot sleep */ | |
147 | if (access("/sys/power/disk", W_OK) < 0) | |
148 | return false; | |
149 | ||
150 | r = read_one_line_file("/sys/power/disk", &p); | |
151 | if (r < 0) | |
152 | return false; | |
153 | ||
154 | STRV_FOREACH(type, types) { | |
a2a5291b | 155 | const char *word, *state; |
19adb8a3 ZJS |
156 | size_t l, k; |
157 | ||
158 | k = strlen(*type); | |
a2a5291b ZJS |
159 | FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) { |
160 | if (l == k && memcmp(word, *type, l) == 0) | |
19adb8a3 ZJS |
161 | return true; |
162 | ||
a2a5291b ZJS |
163 | if (l == k + 2 && |
164 | word[0] == '[' && | |
165 | memcmp(word + 1, *type, l - 2) == 0 && | |
166 | word[l-1] == ']') | |
19adb8a3 ZJS |
167 | return true; |
168 | } | |
169 | } | |
170 | ||
171 | return false; | |
172 | } | |
173 | ||
69ab8088 ZJS |
174 | #define HIBERNATION_SWAP_THRESHOLD 0.98 |
175 | ||
17c40b3a | 176 | int find_hibernate_location(char **device, char **type, size_t *size, size_t *used) { |
9fb3675e | 177 | _cleanup_fclose_ FILE *f; |
1fa2f38f | 178 | unsigned i; |
9fb3675e | 179 | |
c8a202b7 | 180 | f = fopen("/proc/swaps", "re"); |
9fb3675e ZJS |
181 | if (!f) { |
182 | log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, | |
183 | "Failed to retrieve open /proc/swaps: %m"); | |
184 | assert(errno > 0); | |
185 | return -errno; | |
186 | } | |
69ab8088 | 187 | |
9fb3675e ZJS |
188 | (void) fscanf(f, "%*s %*s %*s %*s %*s\n"); |
189 | ||
190 | for (i = 1;; i++) { | |
17c40b3a | 191 | _cleanup_free_ char *dev_field = NULL, *type_field = NULL; |
9fb3675e ZJS |
192 | size_t size_field, used_field; |
193 | int k; | |
194 | ||
195 | k = fscanf(f, | |
196 | "%ms " /* device/file */ | |
197 | "%ms " /* type of swap */ | |
1fa2f38f ZJS |
198 | "%zu " /* swap size */ |
199 | "%zu " /* used */ | |
9fb3675e | 200 | "%*i\n", /* priority */ |
17c40b3a | 201 | &dev_field, &type_field, &size_field, &used_field); |
9fb3675e ZJS |
202 | if (k != 4) { |
203 | if (k == EOF) | |
204 | break; | |
205 | ||
206 | log_warning("Failed to parse /proc/swaps:%u", i); | |
207 | continue; | |
208 | } | |
209 | ||
17c40b3a ML |
210 | if (streq(type_field, "partition") && endswith(dev_field, "\\040(deleted)")) { |
211 | log_warning("Ignoring deleted swapfile '%s'.", dev_field); | |
9fb3675e ZJS |
212 | continue; |
213 | } | |
17c40b3a ML |
214 | if (device) |
215 | *device = TAKE_PTR(dev_field); | |
216 | if (type) | |
217 | *type = TAKE_PTR(type_field); | |
218 | if (size) | |
219 | *size = size_field; | |
220 | if (used) | |
221 | *used = used_field; | |
9fb3675e | 222 | return 0; |
69ab8088 ZJS |
223 | } |
224 | ||
9fb3675e ZJS |
225 | log_debug("No swap partitions were found."); |
226 | return -ENOSYS; | |
227 | } | |
228 | ||
4638cd39 | 229 | static bool enough_swap_for_hibernation(void) { |
9fb3675e | 230 | _cleanup_free_ char *active = NULL; |
39883f62 LP |
231 | unsigned long long act = 0; |
232 | size_t size = 0, used = 0; | |
9fb3675e ZJS |
233 | int r; |
234 | ||
490d20e6 VV |
235 | if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0) |
236 | return true; | |
237 | ||
17c40b3a | 238 | r = find_hibernate_location(NULL, NULL, &size, &used); |
9fb3675e | 239 | if (r < 0) |
69ab8088 | 240 | return false; |
69ab8088 | 241 | |
c4cd1d4d | 242 | r = get_proc_field("/proc/meminfo", "Active(anon)", WHITESPACE, &active); |
69ab8088 | 243 | if (r < 0) { |
da927ba9 | 244 | log_error_errno(r, "Failed to retrieve Active(anon) from /proc/meminfo: %m"); |
69ab8088 ZJS |
245 | return false; |
246 | } | |
247 | ||
248 | r = safe_atollu(active, &act); | |
249 | if (r < 0) { | |
c33b3297 MS |
250 | log_error_errno(r, "Failed to parse Active(anon) from /proc/meminfo: %s: %m", |
251 | active); | |
69ab8088 ZJS |
252 | return false; |
253 | } | |
254 | ||
9fb3675e ZJS |
255 | r = act <= (size - used) * HIBERNATION_SWAP_THRESHOLD; |
256 | log_debug("Hibernation is %spossible, Active(anon)=%llu kB, size=%zu kB, used=%zu kB, threshold=%.2g%%", | |
257 | r ? "" : "im", act, size, used, 100*HIBERNATION_SWAP_THRESHOLD); | |
69ab8088 ZJS |
258 | |
259 | return r; | |
260 | } | |
261 | ||
17c40b3a ML |
262 | int read_fiemap(int fd, struct fiemap **ret) { |
263 | _cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL; | |
17c40b3a ML |
264 | struct stat statinfo; |
265 | uint32_t result_extents = 0; | |
266 | uint64_t fiemap_start = 0, fiemap_length; | |
6524f1a8 ZJS |
267 | const size_t n_extra = DIV_ROUND_UP(sizeof(struct fiemap), sizeof(struct fiemap_extent)); |
268 | size_t fiemap_allocated = n_extra, result_fiemap_allocated = n_extra; | |
17c40b3a ML |
269 | |
270 | if (fstat(fd, &statinfo) < 0) | |
271 | return log_debug_errno(errno, "Cannot determine file size: %m"); | |
272 | if (!S_ISREG(statinfo.st_mode)) | |
273 | return -ENOTTY; | |
274 | fiemap_length = statinfo.st_size; | |
275 | ||
6524f1a8 ZJS |
276 | /* Zero this out in case we run on a file with no extents */ |
277 | fiemap = calloc(n_extra, sizeof(struct fiemap_extent)); | |
17c40b3a ML |
278 | if (!fiemap) |
279 | return -ENOMEM; | |
280 | ||
6524f1a8 | 281 | result_fiemap = malloc_multiply(n_extra, sizeof(struct fiemap_extent)); |
17c40b3a ML |
282 | if (!result_fiemap) |
283 | return -ENOMEM; | |
284 | ||
285 | /* XFS filesystem has incorrect implementation of fiemap ioctl and | |
286 | * returns extents for only one block-group at a time, so we need | |
287 | * to handle it manually, starting the next fiemap call from the end | |
288 | * of the last extent | |
289 | */ | |
290 | while (fiemap_start < fiemap_length) { | |
291 | *fiemap = (struct fiemap) { | |
292 | .fm_start = fiemap_start, | |
293 | .fm_length = fiemap_length, | |
294 | .fm_flags = FIEMAP_FLAG_SYNC, | |
295 | }; | |
296 | ||
297 | /* Find out how many extents there are */ | |
298 | if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0) | |
299 | return log_debug_errno(errno, "Failed to read extents: %m"); | |
300 | ||
301 | /* Nothing to process */ | |
302 | if (fiemap->fm_mapped_extents == 0) | |
303 | break; | |
304 | ||
6524f1a8 ZJS |
305 | /* Resize fiemap to allow us to read in the extents, result fiemap has to hold all |
306 | * the extents for the whole file. Add space for the initial struct fiemap. */ | |
307 | if (!greedy_realloc0((void**) &fiemap, &fiemap_allocated, | |
308 | n_extra + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent))) | |
17c40b3a ML |
309 | return -ENOMEM; |
310 | ||
311 | fiemap->fm_extent_count = fiemap->fm_mapped_extents; | |
312 | fiemap->fm_mapped_extents = 0; | |
313 | ||
314 | if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0) | |
315 | return log_debug_errno(errno, "Failed to read extents: %m"); | |
316 | ||
6524f1a8 ZJS |
317 | /* Resize result_fiemap to allow us to copy in the extents */ |
318 | if (!greedy_realloc((void**) &result_fiemap, &result_fiemap_allocated, | |
319 | n_extra + result_extents + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent))) | |
17c40b3a ML |
320 | return -ENOMEM; |
321 | ||
322 | memcpy(result_fiemap->fm_extents + result_extents, | |
323 | fiemap->fm_extents, | |
324 | sizeof(struct fiemap_extent) * fiemap->fm_mapped_extents); | |
325 | ||
326 | result_extents += fiemap->fm_mapped_extents; | |
327 | ||
328 | /* Highly unlikely that it is zero */ | |
6524f1a8 | 329 | if (_likely_(fiemap->fm_mapped_extents > 0)) { |
17c40b3a ML |
330 | uint32_t i = fiemap->fm_mapped_extents - 1; |
331 | ||
332 | fiemap_start = fiemap->fm_extents[i].fe_logical + | |
333 | fiemap->fm_extents[i].fe_length; | |
334 | ||
335 | if (fiemap->fm_extents[i].fe_flags & FIEMAP_EXTENT_LAST) | |
336 | break; | |
337 | } | |
338 | } | |
339 | ||
340 | memcpy(result_fiemap, fiemap, sizeof(struct fiemap)); | |
341 | result_fiemap->fm_mapped_extents = result_extents; | |
342 | *ret = TAKE_PTR(result_fiemap); | |
343 | return 0; | |
344 | } | |
345 | ||
c58493c0 | 346 | static bool can_s2h(void) { |
c863dc05 | 347 | const char *p; |
c58493c0 ML |
348 | int r; |
349 | ||
350 | r = access("/sys/class/rtc/rtc0/wakealarm", W_OK); | |
351 | if (r < 0) { | |
352 | log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, | |
353 | "/sys/class/rct/rct0/wakealarm is not writable %m"); | |
354 | return false; | |
355 | } | |
356 | ||
c863dc05 ZJS |
357 | FOREACH_STRING(p, "suspend", "hibernate") { |
358 | r = can_sleep(p); | |
b71c9758 | 359 | if (IN_SET(r, 0, -ENOSPC)) { |
c863dc05 ZJS |
360 | log_debug("Unable to %s system.", p); |
361 | return false; | |
362 | } | |
b71c9758 ZJS |
363 | if (r < 0) |
364 | return log_debug_errno(r, "Failed to check if %s is possible: %m", p); | |
c58493c0 ML |
365 | } |
366 | ||
367 | return true; | |
368 | } | |
369 | ||
19adb8a3 ZJS |
370 | int can_sleep(const char *verb) { |
371 | _cleanup_strv_free_ char **modes = NULL, **states = NULL; | |
372 | int r; | |
373 | ||
e68c79db | 374 | assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); |
c58493c0 | 375 | |
e68c79db | 376 | if (streq(verb, "suspend-then-hibernate")) |
c58493c0 | 377 | return can_s2h(); |
19adb8a3 | 378 | |
c58493c0 | 379 | r = parse_sleep_config(verb, &modes, &states, NULL); |
19adb8a3 ZJS |
380 | if (r < 0) |
381 | return false; | |
382 | ||
69ab8088 ZJS |
383 | if (!can_sleep_state(states) || !can_sleep_disk(modes)) |
384 | return false; | |
385 | ||
b71c9758 ZJS |
386 | if (streq(verb, "suspend")) |
387 | return true; | |
388 | ||
4638cd39 | 389 | if (!enough_swap_for_hibernation()) |
b71c9758 ZJS |
390 | return -ENOSPC; |
391 | ||
392 | return true; | |
19adb8a3 | 393 | } |