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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
19adb8a3 | 2 | /*** |
96b2fb93 | 3 | Copyright © 2018 Dell Inc. |
19adb8a3 ZJS |
4 | ***/ |
5 | ||
a8fbdf54 | 6 | #include <errno.h> |
ca78ad1d | 7 | #include <fcntl.h> |
17c40b3a | 8 | #include <linux/fs.h> |
a8fbdf54 TA |
9 | #include <stdbool.h> |
10 | #include <stddef.h> | |
36dd5ffd | 11 | #include <sys/ioctl.h> |
ca78ad1d ZJS |
12 | #include <sys/stat.h> |
13 | #include <sys/types.h> | |
a8fbdf54 TA |
14 | #include <syslog.h> |
15 | #include <unistd.h> | |
19adb8a3 | 16 | |
b5efdb8a | 17 | #include "alloc-util.h" |
52133271 | 18 | #include "blockdev-util.h" |
7bdf56a2 | 19 | #include "btrfs-util.h" |
19adb8a3 | 20 | #include "conf-parser.h" |
a0f29c76 | 21 | #include "def.h" |
490d20e6 | 22 | #include "env-util.h" |
427646ea | 23 | #include "errno-util.h" |
3ffd4af2 | 24 | #include "fd-util.h" |
19adb8a3 ZJS |
25 | #include "fileio.h" |
26 | #include "log.h" | |
a8fbdf54 | 27 | #include "macro.h" |
a0f29c76 | 28 | #include "parse-util.h" |
411ae92b | 29 | #include "path-util.h" |
3ffd4af2 | 30 | #include "sleep-config.h" |
7bdf56a2 | 31 | #include "stdio-util.h" |
07630cea | 32 | #include "string-util.h" |
19adb8a3 | 33 | #include "strv.h" |
1bbbefe7 | 34 | #include "time-util.h" |
19adb8a3 | 35 | |
28ca9c24 ZS |
36 | int parse_sleep_config(SleepConfig **ret_sleep_config) { |
37 | _cleanup_(free_sleep_configp) SleepConfig *sc; | |
e8f1d00d ZJS |
38 | int allow_suspend = -1, allow_hibernate = -1, |
39 | allow_s2h = -1, allow_hybrid_sleep = -1; | |
28ca9c24 ZS |
40 | |
41 | sc = new0(SleepConfig, 1); | |
42 | if (!sc) | |
43 | return log_oom(); | |
19adb8a3 ZJS |
44 | |
45 | const ConfigTableItem items[] = { | |
e8f1d00d ZJS |
46 | { "Sleep", "AllowSuspend", config_parse_tristate, 0, &allow_suspend }, |
47 | { "Sleep", "AllowHibernation", config_parse_tristate, 0, &allow_hibernate }, | |
48 | { "Sleep", "AllowSuspendThenHibernate", config_parse_tristate, 0, &allow_s2h }, | |
49 | { "Sleep", "AllowHybridSleep", config_parse_tristate, 0, &allow_hybrid_sleep }, | |
50 | ||
28ca9c24 ZS |
51 | { "Sleep", "SuspendMode", config_parse_strv, 0, &sc->suspend_modes }, |
52 | { "Sleep", "SuspendState", config_parse_strv, 0, &sc->suspend_states }, | |
53 | { "Sleep", "HibernateMode", config_parse_strv, 0, &sc->hibernate_modes }, | |
54 | { "Sleep", "HibernateState", config_parse_strv, 0, &sc->hibernate_states }, | |
55 | { "Sleep", "HybridSleepMode", config_parse_strv, 0, &sc->hybrid_modes }, | |
56 | { "Sleep", "HybridSleepState", config_parse_strv, 0, &sc->hybrid_states }, | |
e8f1d00d | 57 | |
28ca9c24 | 58 | { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &sc->hibernate_delay_sec}, |
34c10968 LP |
59 | {} |
60 | }; | |
19adb8a3 | 61 | |
4f9ff96a LP |
62 | (void) config_parse_many_nulstr( |
63 | PKGSYSCONFDIR "/sleep.conf", | |
64 | CONF_PATHS_NULSTR("systemd/sleep.conf.d"), | |
65 | "Sleep\0", | |
66 | config_item_table_lookup, items, | |
67 | CONFIG_PARSE_WARN, | |
68 | NULL, | |
69 | NULL); | |
19adb8a3 | 70 | |
28ca9c24 ZS |
71 | /* use default values unless set */ |
72 | sc->allow_suspend = allow_suspend != 0; | |
73 | sc->allow_hibernate = allow_hibernate != 0; | |
7874583d ZS |
74 | sc->allow_hybrid_sleep = allow_hybrid_sleep >= 0 ? allow_hybrid_sleep |
75 | : (allow_suspend != 0 && allow_hibernate != 0); | |
76 | sc->allow_s2h = allow_s2h >= 0 ? allow_s2h | |
77 | : (allow_suspend != 0 && allow_hibernate != 0); | |
28ca9c24 ZS |
78 | |
79 | if (!sc->suspend_states) | |
80 | sc->suspend_states = strv_new("mem", "standby", "freeze"); | |
81 | if (!sc->hibernate_modes) | |
82 | sc->hibernate_modes = strv_new("platform", "shutdown"); | |
83 | if (!sc->hibernate_states) | |
84 | sc->hibernate_states = strv_new("disk"); | |
85 | if (!sc->hybrid_modes) | |
86 | sc->hybrid_modes = strv_new("suspend", "platform", "shutdown"); | |
87 | if (!sc->hybrid_states) | |
88 | sc->hybrid_states = strv_new("disk"); | |
89 | if (sc->hibernate_delay_sec == 0) | |
a077755a | 90 | sc->hibernate_delay_sec = 2 * USEC_PER_HOUR; |
28ca9c24 ZS |
91 | |
92 | /* ensure values set for all required fields */ | |
93 | if (!sc->suspend_states || !sc->hibernate_modes | |
94 | || !sc->hibernate_states || !sc->hybrid_modes || !sc->hybrid_states) | |
19adb8a3 | 95 | return log_oom(); |
19adb8a3 | 96 | |
28ca9c24 | 97 | *ret_sleep_config = TAKE_PTR(sc); |
c58493c0 | 98 | |
19adb8a3 ZJS |
99 | return 0; |
100 | } | |
101 | ||
102 | int can_sleep_state(char **types) { | |
a2a5291b | 103 | char **type; |
19adb8a3 ZJS |
104 | int r; |
105 | _cleanup_free_ char *p = NULL; | |
106 | ||
107 | if (strv_isempty(types)) | |
108 | return true; | |
109 | ||
110 | /* If /sys is read-only we cannot sleep */ | |
c0d8fbfa LP |
111 | if (access("/sys/power/state", W_OK) < 0) { |
112 | log_debug_errno(errno, "/sys/power/state is not writable, cannot sleep: %m"); | |
19adb8a3 | 113 | return false; |
c0d8fbfa | 114 | } |
19adb8a3 ZJS |
115 | |
116 | r = read_one_line_file("/sys/power/state", &p); | |
c0d8fbfa LP |
117 | if (r < 0) { |
118 | log_debug_errno(r, "Failed to read /sys/power/state, cannot sleep: %m"); | |
19adb8a3 | 119 | return false; |
c0d8fbfa | 120 | } |
19adb8a3 ZJS |
121 | |
122 | STRV_FOREACH(type, types) { | |
a2a5291b | 123 | const char *word, *state; |
19adb8a3 ZJS |
124 | size_t l, k; |
125 | ||
126 | k = strlen(*type); | |
a2a5291b ZJS |
127 | FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) |
128 | if (l == k && memcmp(word, *type, l) == 0) | |
19adb8a3 ZJS |
129 | return true; |
130 | } | |
131 | ||
132 | return false; | |
133 | } | |
134 | ||
135 | int can_sleep_disk(char **types) { | |
6f9120ad | 136 | _cleanup_free_ char *p = NULL; |
a2a5291b | 137 | char **type; |
19adb8a3 | 138 | int r; |
19adb8a3 ZJS |
139 | |
140 | if (strv_isempty(types)) | |
141 | return true; | |
142 | ||
143 | /* If /sys is read-only we cannot sleep */ | |
7474f15b LP |
144 | if (access("/sys/power/disk", W_OK) < 0) { |
145 | log_debug_errno(errno, "/sys/power/disk is not writable: %m"); | |
19adb8a3 | 146 | return false; |
7474f15b | 147 | } |
19adb8a3 ZJS |
148 | |
149 | r = read_one_line_file("/sys/power/disk", &p); | |
7474f15b LP |
150 | if (r < 0) { |
151 | log_debug_errno(r, "Couldn't read /sys/power/disk: %m"); | |
19adb8a3 | 152 | return false; |
7474f15b | 153 | } |
19adb8a3 ZJS |
154 | |
155 | STRV_FOREACH(type, types) { | |
a2a5291b | 156 | const char *word, *state; |
19adb8a3 ZJS |
157 | size_t l, k; |
158 | ||
159 | k = strlen(*type); | |
a2a5291b ZJS |
160 | FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) { |
161 | if (l == k && memcmp(word, *type, l) == 0) | |
19adb8a3 ZJS |
162 | return true; |
163 | ||
a2a5291b ZJS |
164 | if (l == k + 2 && |
165 | word[0] == '[' && | |
166 | memcmp(word + 1, *type, l - 2) == 0 && | |
167 | word[l-1] == ']') | |
19adb8a3 ZJS |
168 | return true; |
169 | } | |
170 | } | |
171 | ||
172 | return false; | |
173 | } | |
174 | ||
69ab8088 ZJS |
175 | #define HIBERNATION_SWAP_THRESHOLD 0.98 |
176 | ||
7bdf56a2 | 177 | SwapEntry* swap_entry_free(SwapEntry *se) { |
88bc86fc ZS |
178 | if (!se) |
179 | return NULL; | |
180 | ||
181 | free(se->device); | |
182 | free(se->type); | |
183 | ||
184 | return mfree(se); | |
185 | } | |
186 | ||
7bdf56a2 ZS |
187 | HibernateLocation* hibernate_location_free(HibernateLocation *hl) { |
188 | if (!hl) | |
189 | return NULL; | |
190 | ||
191 | swap_entry_free(hl->swap); | |
7bdf56a2 ZS |
192 | |
193 | return mfree(hl); | |
194 | } | |
195 | ||
52133271 | 196 | static int swap_device_to_device_id(const SwapEntry *swap, dev_t *ret_dev) { |
7bdf56a2 | 197 | struct stat sb; |
7bdf56a2 ZS |
198 | int r; |
199 | ||
200 | assert(swap); | |
201 | assert(swap->device); | |
202 | assert(swap->type); | |
203 | ||
e9f0c5d0 | 204 | r = stat(swap->device, &sb); |
7bdf56a2 | 205 | if (r < 0) |
6f9120ad | 206 | return -errno; |
7bdf56a2 | 207 | |
52133271 | 208 | if (streq(swap->type, "partition")) { |
e9f0c5d0 | 209 | if (!S_ISBLK(sb.st_mode)) |
52133271 | 210 | return -ENOTBLK; |
6f9120ad | 211 | |
e9f0c5d0 ZJS |
212 | *ret_dev = sb.st_rdev; |
213 | return 0; | |
6f9120ad | 214 | } |
7bdf56a2 | 215 | |
6f9120ad | 216 | return get_block_device(swap->device, ret_dev); |
7bdf56a2 ZS |
217 | } |
218 | ||
52133271 | 219 | /* |
162392b7 | 220 | * Attempt to calculate the swap file offset on supported filesystems. On unsupported |
8efc2c16 | 221 | * filesystems, a debug message is logged and ret_offset is set to UINT64_MAX. |
52133271 | 222 | */ |
7bdf56a2 ZS |
223 | static int calculate_swap_file_offset(const SwapEntry *swap, uint64_t *ret_offset) { |
224 | _cleanup_close_ int fd = -1; | |
225 | _cleanup_free_ struct fiemap *fiemap = NULL; | |
226 | struct stat sb; | |
227 | int r, btrfs; | |
228 | ||
229 | assert(swap); | |
230 | assert(swap->device); | |
231 | assert(streq(swap->type, "file")); | |
232 | ||
233 | fd = open(swap->device, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
e97c3691 | 234 | if (fd < 0) |
c02540dc | 235 | return log_debug_errno(errno, "Failed to open swap file %s to determine on-disk offset: %m", swap->device); |
7bdf56a2 | 236 | |
e97c3691 | 237 | if (fstat(fd, &sb) < 0) |
c02540dc | 238 | return log_debug_errno(errno, "Failed to stat %s: %m", swap->device); |
7bdf56a2 ZS |
239 | |
240 | btrfs = btrfs_is_filesystem(fd); | |
241 | if (btrfs < 0) | |
c02540dc LP |
242 | return log_debug_errno(btrfs, "Error checking %s for Btrfs filesystem: %m", swap->device); |
243 | if (btrfs > 0) { | |
8efc2c16 ZJS |
244 | log_debug("%s: detection of swap file offset on Btrfs is not supported", swap->device); |
245 | *ret_offset = UINT64_MAX; | |
7bdf56a2 ZS |
246 | return 0; |
247 | } | |
248 | ||
249 | r = read_fiemap(fd, &fiemap); | |
250 | if (r < 0) | |
251 | return log_debug_errno(r, "Unable to read extent map for '%s': %m", swap->device); | |
252 | ||
253 | *ret_offset = fiemap->fm_extents[0].fe_physical / page_size(); | |
7bdf56a2 ZS |
254 | return 0; |
255 | } | |
88bc86fc | 256 | |
52133271 ZS |
257 | static int read_resume_files(dev_t *ret_resume, uint64_t *ret_resume_offset) { |
258 | _cleanup_free_ char *resume_str = NULL, *resume_offset_str = NULL; | |
7bdf56a2 | 259 | uint64_t resume_offset = 0; |
c02540dc | 260 | dev_t resume; |
7bdf56a2 ZS |
261 | int r; |
262 | ||
52133271 | 263 | r = read_one_line_file("/sys/power/resume", &resume_str); |
7bdf56a2 | 264 | if (r < 0) |
5021735f | 265 | return log_debug_errno(r, "Error reading /sys/power/resume: %m"); |
7bdf56a2 | 266 | |
52133271 ZS |
267 | r = parse_dev(resume_str, &resume); |
268 | if (r < 0) | |
269 | return log_debug_errno(r, "Error parsing /sys/power/resume device: %s: %m", resume_str); | |
270 | ||
7bdf56a2 | 271 | r = read_one_line_file("/sys/power/resume_offset", &resume_offset_str); |
b72571e0 | 272 | if (r == -ENOENT) |
c02540dc | 273 | log_debug_errno(r, "Kernel does not support resume_offset; swap file offset detection will be skipped."); |
b72571e0 | 274 | else if (r < 0) |
5021735f | 275 | return log_debug_errno(r, "Error reading /sys/power/resume_offset: %m"); |
b72571e0 | 276 | else { |
7bdf56a2 ZS |
277 | r = safe_atou64(resume_offset_str, &resume_offset); |
278 | if (r < 0) | |
c02540dc | 279 | return log_debug_errno(r, "Failed to parse value in /sys/power/resume_offset \"%s\": %m", resume_offset_str); |
7bdf56a2 ZS |
280 | } |
281 | ||
8f817cb8 ZJS |
282 | if (resume_offset > 0 && resume == 0) |
283 | log_debug("Warning: found /sys/power/resume_offset==%" PRIu64 ", but /sys/power/resume unset. Misconfiguration?", | |
5021735f | 284 | resume_offset); |
7bdf56a2 | 285 | |
52133271 | 286 | *ret_resume = resume; |
7bdf56a2 ZS |
287 | *ret_resume_offset = resume_offset; |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
52133271 ZS |
292 | /* |
293 | * Determine if the HibernateLocation matches the resume= (device) and resume_offset= (file). | |
294 | */ | |
295 | static bool location_is_resume_device(const HibernateLocation *location, dev_t sys_resume, uint64_t sys_offset) { | |
296 | if (!location) | |
297 | return false; | |
298 | ||
8efc2c16 ZJS |
299 | return sys_resume > 0 && |
300 | sys_resume == location->devno && | |
301 | (sys_offset == location->offset || (sys_offset > 0 && location->offset == UINT64_MAX)); | |
7bdf56a2 ZS |
302 | } |
303 | ||
304 | /* | |
305 | * Attempt to find the hibernation location by parsing /proc/swaps, /sys/power/resume, and | |
306 | * /sys/power/resume_offset. | |
307 | * | |
308 | * Returns: | |
52133271 ZS |
309 | * 1 - Values are set in /sys/power/resume and /sys/power/resume_offset. |
310 | * ret_hibernate_location will represent matching /proc/swap entry if identified or NULL if not. | |
311 | * | |
312 | * 0 - No values are set in /sys/power/resume and /sys/power/resume_offset. | |
313 | ret_hibernate_location will represent the highest priority swap with most remaining space discovered in /proc/swaps. | |
314 | * | |
315 | * Negative value in the case of error. | |
7bdf56a2 ZS |
316 | */ |
317 | int find_hibernate_location(HibernateLocation **ret_hibernate_location) { | |
b72571e0 | 318 | _cleanup_fclose_ FILE *f = NULL; |
7bdf56a2 | 319 | _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = NULL; |
52133271 | 320 | dev_t sys_resume; |
7bdf56a2 | 321 | uint64_t sys_offset = 0; |
8efc2c16 | 322 | bool resume_match = false; |
7bdf56a2 ZS |
323 | int r; |
324 | ||
325 | /* read the /sys/power/resume & /sys/power/resume_offset values */ | |
326 | r = read_resume_files(&sys_resume, &sys_offset); | |
327 | if (r < 0) | |
328 | return r; | |
9fb3675e | 329 | |
c8a202b7 | 330 | f = fopen("/proc/swaps", "re"); |
9fb3675e | 331 | if (!f) { |
c02540dc LP |
332 | log_debug_errno(errno, "Failed to open /proc/swaps: %m"); |
333 | return errno == ENOENT ? -EOPNOTSUPP : -errno; /* Convert swap not supported to a recognizable error */ | |
9fb3675e | 334 | } |
69ab8088 | 335 | |
9fb3675e | 336 | (void) fscanf(f, "%*s %*s %*s %*s %*s\n"); |
8efc2c16 | 337 | for (unsigned i = 1;; i++) { |
88bc86fc | 338 | _cleanup_(swap_entry_freep) SwapEntry *swap = NULL; |
7bdf56a2 | 339 | uint64_t swap_offset = 0; |
9fb3675e ZJS |
340 | int k; |
341 | ||
88bc86fc ZS |
342 | swap = new0(SwapEntry, 1); |
343 | if (!swap) | |
c02540dc | 344 | return -ENOMEM; |
88bc86fc | 345 | |
9fb3675e | 346 | k = fscanf(f, |
88bc86fc ZS |
347 | "%ms " /* device/file */ |
348 | "%ms " /* type of swap */ | |
349 | "%" PRIu64 /* swap size */ | |
350 | "%" PRIu64 /* used */ | |
351 | "%i\n", /* priority */ | |
352 | &swap->device, &swap->type, &swap->size, &swap->used, &swap->priority); | |
3dea6886 LP |
353 | if (k == EOF) |
354 | break; | |
88bc86fc | 355 | if (k != 5) { |
c02540dc | 356 | log_debug("Failed to parse /proc/swaps:%u, ignoring", i); |
9fb3675e ZJS |
357 | continue; |
358 | } | |
359 | ||
88bc86fc | 360 | if (streq(swap->type, "file")) { |
88bc86fc | 361 | if (endswith(swap->device, "\\040(deleted)")) { |
c02540dc | 362 | log_debug("Ignoring deleted swap file '%s'.", swap->device); |
411ae92b AJ |
363 | continue; |
364 | } | |
365 | ||
7bdf56a2 ZS |
366 | r = calculate_swap_file_offset(swap, &swap_offset); |
367 | if (r < 0) | |
368 | return r; | |
52133271 | 369 | |
88bc86fc | 370 | } else if (streq(swap->type, "partition")) { |
411ae92b | 371 | const char *fn; |
3dea6886 | 372 | |
88bc86fc | 373 | fn = path_startswith(swap->device, "/dev/"); |
411ae92b | 374 | if (fn && startswith(fn, "zram")) { |
8efc2c16 | 375 | log_debug("%s: ignoring zram swap", swap->device); |
411ae92b AJ |
376 | continue; |
377 | } | |
8efc2c16 | 378 | |
7bdf56a2 | 379 | } else { |
8efc2c16 | 380 | log_debug("%s: swap type %s is unsupported for hibernation, ignoring", swap->device, swap->type); |
7bdf56a2 | 381 | continue; |
9fb3675e | 382 | } |
3dea6886 | 383 | |
7bdf56a2 | 384 | /* prefer resume device or highest priority swap with most remaining space */ |
8efc2c16 ZJS |
385 | if (hibernate_location && swap->priority < hibernate_location->swap->priority) { |
386 | log_debug("%s: ignoring device with lower priority", swap->device); | |
387 | continue; | |
388 | } | |
389 | if (hibernate_location && | |
390 | (swap->priority == hibernate_location->swap->priority | |
391 | && swap->size - swap->used < hibernate_location->swap->size - hibernate_location->swap->used)) { | |
392 | log_debug("%s: ignoring device with lower usable space", swap->device); | |
393 | continue; | |
394 | } | |
7bdf56a2 | 395 | |
8efc2c16 ZJS |
396 | dev_t swap_device; |
397 | r = swap_device_to_device_id(swap, &swap_device); | |
398 | if (r < 0) | |
c02540dc | 399 | return log_debug_errno(r, "%s: failed to query device number: %m", swap->device); |
7bdf56a2 | 400 | |
8efc2c16 ZJS |
401 | hibernate_location = hibernate_location_free(hibernate_location); |
402 | hibernate_location = new(HibernateLocation, 1); | |
403 | if (!hibernate_location) | |
c02540dc | 404 | return -ENOMEM; |
7bdf56a2 | 405 | |
8efc2c16 ZJS |
406 | *hibernate_location = (HibernateLocation) { |
407 | .devno = swap_device, | |
408 | .offset = swap_offset, | |
409 | .swap = TAKE_PTR(swap), | |
410 | }; | |
7bdf56a2 | 411 | |
8efc2c16 ZJS |
412 | /* if the swap is the resume device, stop the loop */ |
413 | if (location_is_resume_device(hibernate_location, sys_resume, sys_offset)) { | |
414 | log_debug("%s: device matches configured resume settings.", hibernate_location->swap->device); | |
415 | resume_match = true; | |
416 | break; | |
88bc86fc | 417 | } |
8efc2c16 ZJS |
418 | |
419 | log_debug("%s: is a candidate device.", hibernate_location->swap->device); | |
69ab8088 ZJS |
420 | } |
421 | ||
8efc2c16 ZJS |
422 | /* We found nothing at all */ |
423 | if (!hibernate_location) | |
424 | return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS), | |
425 | "No possible swap partitions or files suitable for hibernation were found in /proc/swaps."); | |
52133271 | 426 | |
8efc2c16 ZJS |
427 | /* resume= is set but a matching /proc/swaps entry was not found */ |
428 | if (sys_resume != 0 && !resume_match) | |
429 | return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS), | |
430 | "No swap partitions or files matching resume config were found in /proc/swaps."); | |
52133271 | 431 | |
8efc2c16 ZJS |
432 | if (hibernate_location->offset == UINT64_MAX) { |
433 | if (sys_offset == 0) | |
434 | return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS), "Offset detection failed and /sys/power/resume_offset is not set."); | |
7bdf56a2 | 435 | |
8efc2c16 ZJS |
436 | hibernate_location->offset = sys_offset; |
437 | } | |
7bdf56a2 | 438 | |
52133271 ZS |
439 | if (resume_match) |
440 | log_debug("Hibernation will attempt to use swap entry with path: %s, device: %u:%u, offset: %" PRIu64 ", priority: %i", | |
441 | hibernate_location->swap->device, major(hibernate_location->devno), minor(hibernate_location->devno), | |
442 | hibernate_location->offset, hibernate_location->swap->priority); | |
443 | else | |
8efc2c16 | 444 | log_debug("/sys/power/resume is not configured; attempting to hibernate with path: %s, device: %u:%u, offset: %" PRIu64 ", priority: %i", |
52133271 ZS |
445 | hibernate_location->swap->device, major(hibernate_location->devno), minor(hibernate_location->devno), |
446 | hibernate_location->offset, hibernate_location->swap->priority); | |
88bc86fc | 447 | |
7bdf56a2 | 448 | *ret_hibernate_location = TAKE_PTR(hibernate_location); |
88bc86fc | 449 | |
52133271 | 450 | if (resume_match) |
7bdf56a2 | 451 | return 1; |
88bc86fc ZS |
452 | |
453 | return 0; | |
9fb3675e ZJS |
454 | } |
455 | ||
4638cd39 | 456 | static bool enough_swap_for_hibernation(void) { |
9fb3675e | 457 | _cleanup_free_ char *active = NULL; |
7bdf56a2 | 458 | _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = NULL; |
39883f62 | 459 | unsigned long long act = 0; |
9fb3675e ZJS |
460 | int r; |
461 | ||
490d20e6 VV |
462 | if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0) |
463 | return true; | |
464 | ||
7bdf56a2 | 465 | r = find_hibernate_location(&hibernate_location); |
9fb3675e | 466 | if (r < 0) |
69ab8088 | 467 | return false; |
69ab8088 | 468 | |
52133271 ZS |
469 | /* If /sys/power/{resume,resume_offset} is configured but a matching entry |
470 | * could not be identified in /proc/swaps, user is likely using Btrfs with a swapfile; | |
471 | * return true and let the system attempt hibernation. | |
472 | */ | |
473 | if (r > 0 && !hibernate_location) { | |
474 | log_debug("Unable to determine remaining swap space; hibernation may fail"); | |
475 | return true; | |
476 | } | |
477 | ||
478 | if (!hibernate_location) | |
479 | return false; | |
480 | ||
c4cd1d4d | 481 | r = get_proc_field("/proc/meminfo", "Active(anon)", WHITESPACE, &active); |
69ab8088 | 482 | if (r < 0) { |
904865b8 | 483 | log_debug_errno(r, "Failed to retrieve Active(anon) from /proc/meminfo: %m"); |
69ab8088 ZJS |
484 | return false; |
485 | } | |
486 | ||
487 | r = safe_atollu(active, &act); | |
488 | if (r < 0) { | |
904865b8 | 489 | log_debug_errno(r, "Failed to parse Active(anon) from /proc/meminfo: %s: %m", active); |
69ab8088 ZJS |
490 | return false; |
491 | } | |
492 | ||
7bdf56a2 | 493 | r = act <= (hibernate_location->swap->size - hibernate_location->swap->used) * HIBERNATION_SWAP_THRESHOLD; |
88bc86fc | 494 | log_debug("%s swap for hibernation, Active(anon)=%llu kB, size=%" PRIu64 " kB, used=%" PRIu64 " kB, threshold=%.2g%%", |
7bdf56a2 | 495 | r ? "Enough" : "Not enough", act, hibernate_location->swap->size, hibernate_location->swap->used, 100*HIBERNATION_SWAP_THRESHOLD); |
69ab8088 ZJS |
496 | |
497 | return r; | |
498 | } | |
499 | ||
17c40b3a ML |
500 | int read_fiemap(int fd, struct fiemap **ret) { |
501 | _cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL; | |
17c40b3a ML |
502 | struct stat statinfo; |
503 | uint32_t result_extents = 0; | |
504 | uint64_t fiemap_start = 0, fiemap_length; | |
6524f1a8 ZJS |
505 | const size_t n_extra = DIV_ROUND_UP(sizeof(struct fiemap), sizeof(struct fiemap_extent)); |
506 | size_t fiemap_allocated = n_extra, result_fiemap_allocated = n_extra; | |
17c40b3a ML |
507 | |
508 | if (fstat(fd, &statinfo) < 0) | |
509 | return log_debug_errno(errno, "Cannot determine file size: %m"); | |
510 | if (!S_ISREG(statinfo.st_mode)) | |
511 | return -ENOTTY; | |
512 | fiemap_length = statinfo.st_size; | |
513 | ||
6524f1a8 ZJS |
514 | /* Zero this out in case we run on a file with no extents */ |
515 | fiemap = calloc(n_extra, sizeof(struct fiemap_extent)); | |
17c40b3a ML |
516 | if (!fiemap) |
517 | return -ENOMEM; | |
518 | ||
6524f1a8 | 519 | result_fiemap = malloc_multiply(n_extra, sizeof(struct fiemap_extent)); |
17c40b3a ML |
520 | if (!result_fiemap) |
521 | return -ENOMEM; | |
522 | ||
523 | /* XFS filesystem has incorrect implementation of fiemap ioctl and | |
524 | * returns extents for only one block-group at a time, so we need | |
525 | * to handle it manually, starting the next fiemap call from the end | |
526 | * of the last extent | |
527 | */ | |
528 | while (fiemap_start < fiemap_length) { | |
529 | *fiemap = (struct fiemap) { | |
530 | .fm_start = fiemap_start, | |
531 | .fm_length = fiemap_length, | |
532 | .fm_flags = FIEMAP_FLAG_SYNC, | |
533 | }; | |
534 | ||
535 | /* Find out how many extents there are */ | |
536 | if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0) | |
537 | return log_debug_errno(errno, "Failed to read extents: %m"); | |
538 | ||
539 | /* Nothing to process */ | |
540 | if (fiemap->fm_mapped_extents == 0) | |
541 | break; | |
542 | ||
6524f1a8 ZJS |
543 | /* Resize fiemap to allow us to read in the extents, result fiemap has to hold all |
544 | * the extents for the whole file. Add space for the initial struct fiemap. */ | |
545 | if (!greedy_realloc0((void**) &fiemap, &fiemap_allocated, | |
546 | n_extra + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent))) | |
17c40b3a ML |
547 | return -ENOMEM; |
548 | ||
549 | fiemap->fm_extent_count = fiemap->fm_mapped_extents; | |
550 | fiemap->fm_mapped_extents = 0; | |
551 | ||
552 | if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0) | |
553 | return log_debug_errno(errno, "Failed to read extents: %m"); | |
554 | ||
6524f1a8 ZJS |
555 | /* Resize result_fiemap to allow us to copy in the extents */ |
556 | if (!greedy_realloc((void**) &result_fiemap, &result_fiemap_allocated, | |
557 | n_extra + result_extents + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent))) | |
17c40b3a ML |
558 | return -ENOMEM; |
559 | ||
560 | memcpy(result_fiemap->fm_extents + result_extents, | |
561 | fiemap->fm_extents, | |
562 | sizeof(struct fiemap_extent) * fiemap->fm_mapped_extents); | |
563 | ||
564 | result_extents += fiemap->fm_mapped_extents; | |
565 | ||
566 | /* Highly unlikely that it is zero */ | |
6524f1a8 | 567 | if (_likely_(fiemap->fm_mapped_extents > 0)) { |
17c40b3a ML |
568 | uint32_t i = fiemap->fm_mapped_extents - 1; |
569 | ||
570 | fiemap_start = fiemap->fm_extents[i].fe_logical + | |
571 | fiemap->fm_extents[i].fe_length; | |
572 | ||
573 | if (fiemap->fm_extents[i].fe_flags & FIEMAP_EXTENT_LAST) | |
574 | break; | |
575 | } | |
576 | } | |
577 | ||
578 | memcpy(result_fiemap, fiemap, sizeof(struct fiemap)); | |
579 | result_fiemap->fm_mapped_extents = result_extents; | |
580 | *ret = TAKE_PTR(result_fiemap); | |
581 | return 0; | |
582 | } | |
583 | ||
28ca9c24 | 584 | static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config); |
e8f1d00d | 585 | |
28ca9c24 | 586 | static bool can_s2h(const SleepConfig *sleep_config) { |
c863dc05 | 587 | const char *p; |
c58493c0 ML |
588 | int r; |
589 | ||
1bbbefe7 | 590 | if (!clock_supported(CLOCK_BOOTTIME_ALARM)) { |
c58493c0 | 591 | log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, |
1bbbefe7 | 592 | "CLOCK_BOOTTIME_ALARM is not supported"); |
c58493c0 ML |
593 | return false; |
594 | } | |
595 | ||
c863dc05 | 596 | FOREACH_STRING(p, "suspend", "hibernate") { |
28ca9c24 | 597 | r = can_sleep_internal(p, false, sleep_config); |
8340b762 | 598 | if (IN_SET(r, 0, -ENOSPC, -EADV)) { |
c863dc05 ZJS |
599 | log_debug("Unable to %s system.", p); |
600 | return false; | |
601 | } | |
b71c9758 ZJS |
602 | if (r < 0) |
603 | return log_debug_errno(r, "Failed to check if %s is possible: %m", p); | |
c58493c0 ML |
604 | } |
605 | ||
606 | return true; | |
607 | } | |
608 | ||
28ca9c24 | 609 | static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config) { |
e8f1d00d | 610 | bool allow; |
28ca9c24 | 611 | char **modes = NULL, **states = NULL; |
19adb8a3 ZJS |
612 | int r; |
613 | ||
e68c79db | 614 | assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); |
c58493c0 | 615 | |
28ca9c24 | 616 | r = sleep_settings(verb, sleep_config, &allow, &modes, &states); |
19adb8a3 ZJS |
617 | if (r < 0) |
618 | return false; | |
619 | ||
e8f1d00d ZJS |
620 | if (check_allowed && !allow) { |
621 | log_debug("Sleep mode \"%s\" is disabled by configuration.", verb); | |
622 | return false; | |
623 | } | |
624 | ||
625 | if (streq(verb, "suspend-then-hibernate")) | |
28ca9c24 | 626 | return can_s2h(sleep_config); |
e8f1d00d | 627 | |
69ab8088 ZJS |
628 | if (!can_sleep_state(states) || !can_sleep_disk(modes)) |
629 | return false; | |
630 | ||
b71c9758 ZJS |
631 | if (streq(verb, "suspend")) |
632 | return true; | |
633 | ||
4638cd39 | 634 | if (!enough_swap_for_hibernation()) |
b71c9758 ZJS |
635 | return -ENOSPC; |
636 | ||
637 | return true; | |
19adb8a3 | 638 | } |
e8f1d00d ZJS |
639 | |
640 | int can_sleep(const char *verb) { | |
28ca9c24 ZS |
641 | _cleanup_(free_sleep_configp) SleepConfig *sleep_config = NULL; |
642 | int r; | |
643 | ||
644 | r = parse_sleep_config(&sleep_config); | |
645 | if (r < 0) | |
646 | return r; | |
647 | ||
648 | return can_sleep_internal(verb, true, sleep_config); | |
649 | } | |
650 | ||
651 | int sleep_settings(const char *verb, const SleepConfig *sleep_config, bool *ret_allow, char ***ret_modes, char ***ret_states) { | |
652 | ||
653 | assert(verb); | |
654 | assert(sleep_config); | |
655 | assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); | |
656 | ||
657 | if (streq(verb, "suspend")) { | |
658 | *ret_allow = sleep_config->allow_suspend; | |
659 | *ret_modes = sleep_config->suspend_modes; | |
660 | *ret_states = sleep_config->suspend_states; | |
661 | } else if (streq(verb, "hibernate")) { | |
662 | *ret_allow = sleep_config->allow_hibernate; | |
663 | *ret_modes = sleep_config->hibernate_modes; | |
664 | *ret_states = sleep_config->hibernate_states; | |
665 | } else if (streq(verb, "hybrid-sleep")) { | |
666 | *ret_allow = sleep_config->allow_hybrid_sleep; | |
667 | *ret_modes = sleep_config->hybrid_modes; | |
668 | *ret_states = sleep_config->hybrid_states; | |
669 | } else if (streq(verb, "suspend-then-hibernate")) { | |
670 | *ret_allow = sleep_config->allow_s2h; | |
671 | *ret_modes = *ret_states = NULL; | |
672 | } | |
673 | ||
674 | /* suspend modes empty by default */ | |
675 | if ((!ret_modes && !streq(verb, "suspend")) || !ret_states) | |
676 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No modes or states set for %s; Check sleep.conf", verb); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | void free_sleep_config(SleepConfig *sc) { | |
682 | if (!sc) | |
683 | return; | |
684 | ||
685 | strv_free(sc->suspend_modes); | |
686 | strv_free(sc->suspend_states); | |
687 | ||
688 | strv_free(sc->hibernate_modes); | |
689 | strv_free(sc->hibernate_states); | |
690 | ||
691 | strv_free(sc->hybrid_modes); | |
692 | strv_free(sc->hybrid_states); | |
693 | ||
694 | free(sc); | |
e8f1d00d | 695 | } |