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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
57fa1d09 TG |
2 | |
3 | #include <ctype.h> | |
57fa1d09 | 4 | #include <net/if.h> |
07630cea | 5 | #include <sys/types.h> |
57fa1d09 TG |
6 | |
7 | #include "sd-device.h" | |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
57fa1d09 TG |
10 | #include "device-internal.h" |
11 | #include "device-private.h" | |
07630cea | 12 | #include "device-util.h" |
3ffd4af2 | 13 | #include "fd-util.h" |
07630cea | 14 | #include "fileio.h" |
f4f15635 | 15 | #include "fs-util.h" |
07630cea LP |
16 | #include "hashmap.h" |
17 | #include "macro.h" | |
18 | #include "mkdir.h" | |
6bedfcbb | 19 | #include "parse-util.h" |
07630cea LP |
20 | #include "path-util.h" |
21 | #include "refcnt.h" | |
22 | #include "set.h" | |
8b43440b | 23 | #include "string-table.h" |
07630cea LP |
24 | #include "string-util.h" |
25 | #include "strv.h" | |
26 | #include "strxcpyx.h" | |
e4de7287 | 27 | #include "tmpfile-util.h" |
ee104e11 | 28 | #include "user-util.h" |
07630cea | 29 | #include "util.h" |
57fa1d09 TG |
30 | |
31 | int device_add_property(sd_device *device, const char *key, const char *value) { | |
32 | int r; | |
33 | ||
34 | assert(device); | |
35 | assert(key); | |
36 | ||
37 | r = device_add_property_aux(device, key, value, false); | |
38 | if (r < 0) | |
39 | return r; | |
40 | ||
41 | if (key[0] != '.') { | |
42 | r = device_add_property_aux(device, key, value, true); | |
43 | if (r < 0) | |
44 | return r; | |
45 | } | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
57fa1d09 TG |
50 | void device_set_devlink_priority(sd_device *device, int priority) { |
51 | assert(device); | |
52 | ||
53 | device->devlink_priority = priority; | |
54 | } | |
55 | ||
56 | void device_set_is_initialized(sd_device *device) { | |
57 | assert(device); | |
58 | ||
59 | device->is_initialized = true; | |
60 | } | |
61 | ||
62 | int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { | |
dc5042c0 | 63 | usec_t when; |
57fa1d09 TG |
64 | |
65 | assert(device); | |
66 | ||
67 | if (device_old && device_old->usec_initialized > 0) | |
dc5042c0 | 68 | when = device_old->usec_initialized; |
57fa1d09 | 69 | else |
dc5042c0 | 70 | when = now(CLOCK_MONOTONIC); |
57fa1d09 | 71 | |
dc5042c0 | 72 | return device_set_usec_initialized(device, when); |
57fa1d09 TG |
73 | } |
74 | ||
57fa1d09 TG |
75 | uint64_t device_get_properties_generation(sd_device *device) { |
76 | assert(device); | |
77 | ||
78 | return device->properties_generation; | |
79 | } | |
80 | ||
81 | uint64_t device_get_tags_generation(sd_device *device) { | |
82 | assert(device); | |
83 | ||
84 | return device->tags_generation; | |
85 | } | |
86 | ||
87 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
88 | assert(device); | |
89 | ||
90 | return device->devlinks_generation; | |
91 | } | |
92 | ||
93 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
94 | int r; | |
95 | ||
96 | assert(device); | |
57fa1d09 TG |
97 | |
98 | r = device_read_db(device); | |
99 | if (r < 0) | |
100 | return r; | |
101 | ||
dcfbde3a YW |
102 | if (device->devmode == (mode_t) -1) |
103 | return -ENOENT; | |
104 | ||
78ffb476 YW |
105 | if (mode) |
106 | *mode = device->devmode; | |
57fa1d09 TG |
107 | |
108 | return 0; | |
109 | } | |
110 | ||
111 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
112 | int r; | |
113 | ||
114 | assert(device); | |
57fa1d09 TG |
115 | |
116 | r = device_read_db(device); | |
117 | if (r < 0) | |
118 | return r; | |
119 | ||
dcfbde3a YW |
120 | if (device->devuid == (uid_t) -1) |
121 | return -ENOENT; | |
122 | ||
78ffb476 YW |
123 | if (uid) |
124 | *uid = device->devuid; | |
57fa1d09 TG |
125 | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static int device_set_devuid(sd_device *device, const char *uid) { | |
130 | unsigned u; | |
131 | int r; | |
132 | ||
133 | assert(device); | |
134 | assert(uid); | |
135 | ||
136 | r = safe_atou(uid, &u); | |
137 | if (r < 0) | |
138 | return r; | |
139 | ||
140 | r = device_add_property_internal(device, "DEVUID", uid); | |
141 | if (r < 0) | |
142 | return r; | |
143 | ||
144 | device->devuid = u; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
150 | int r; | |
151 | ||
152 | assert(device); | |
57fa1d09 TG |
153 | |
154 | r = device_read_db(device); | |
155 | if (r < 0) | |
156 | return r; | |
157 | ||
dcfbde3a YW |
158 | if (device->devgid == (gid_t) -1) |
159 | return -ENOENT; | |
160 | ||
78ffb476 YW |
161 | if (gid) |
162 | *gid = device->devgid; | |
57fa1d09 TG |
163 | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int device_set_devgid(sd_device *device, const char *gid) { | |
168 | unsigned g; | |
169 | int r; | |
170 | ||
171 | assert(device); | |
172 | assert(gid); | |
173 | ||
174 | r = safe_atou(gid, &g); | |
175 | if (r < 0) | |
176 | return r; | |
177 | ||
178 | r = device_add_property_internal(device, "DEVGID", gid); | |
179 | if (r < 0) | |
180 | return r; | |
181 | ||
182 | device->devgid = g; | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
401cb614 | 187 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
188 | int r; |
189 | ||
190 | assert(device); | |
191 | assert(key); | |
192 | assert(value); | |
193 | ||
194 | if (streq(key, "DEVPATH")) { | |
195 | char *path; | |
196 | ||
197 | path = strjoina("/sys", value); | |
198 | ||
199 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
200 | r = device_set_syspath(device, path, false); | |
201 | if (r < 0) | |
c7d54dae | 202 | return log_device_debug_errno(device, r, "sd-device: Failed to set syspath to '%s': %m", path); |
57fa1d09 TG |
203 | } else if (streq(key, "SUBSYSTEM")) { |
204 | r = device_set_subsystem(device, value); | |
205 | if (r < 0) | |
c7d54dae | 206 | return log_device_debug_errno(device, r, "sd-device: Failed to set subsystem to '%s': %m", value); |
57fa1d09 TG |
207 | } else if (streq(key, "DEVTYPE")) { |
208 | r = device_set_devtype(device, value); | |
209 | if (r < 0) | |
c7d54dae | 210 | return log_device_debug_errno(device, r, "sd-device: Failed to set devtype to '%s': %m", value); |
57fa1d09 TG |
211 | } else if (streq(key, "DEVNAME")) { |
212 | r = device_set_devname(device, value); | |
213 | if (r < 0) | |
c7d54dae | 214 | return log_device_debug_errno(device, r, "sd-device: Failed to set devname to '%s': %m", value); |
57fa1d09 | 215 | } else if (streq(key, "USEC_INITIALIZED")) { |
dc5042c0 ZJS |
216 | usec_t t; |
217 | ||
218 | r = safe_atou64(value, &t); | |
219 | if (r < 0) | |
220 | return log_device_debug_errno(device, r, "sd-device: Failed to parse timestamp '%s': %m", value); | |
221 | ||
222 | r = device_set_usec_initialized(device, t); | |
57fa1d09 | 223 | if (r < 0) |
c7d54dae | 224 | return log_device_debug_errno(device, r, "sd-device: Failed to set usec-initialized to '%s': %m", value); |
57fa1d09 TG |
225 | } else if (streq(key, "DRIVER")) { |
226 | r = device_set_driver(device, value); | |
227 | if (r < 0) | |
c7d54dae | 228 | return log_device_debug_errno(device, r, "sd-device: Failed to set driver to '%s': %m", value); |
57fa1d09 TG |
229 | } else if (streq(key, "IFINDEX")) { |
230 | r = device_set_ifindex(device, value); | |
231 | if (r < 0) | |
c7d54dae | 232 | return log_device_debug_errno(device, r, "sd-device: Failed to set ifindex to '%s': %m", value); |
57fa1d09 TG |
233 | } else if (streq(key, "DEVMODE")) { |
234 | r = device_set_devmode(device, value); | |
235 | if (r < 0) | |
c7d54dae | 236 | return log_device_debug_errno(device, r, "sd-device: Failed to set devmode to '%s': %m", value); |
57fa1d09 TG |
237 | } else if (streq(key, "DEVUID")) { |
238 | r = device_set_devuid(device, value); | |
239 | if (r < 0) | |
c7d54dae | 240 | return log_device_debug_errno(device, r, "sd-device: Failed to set devuid to '%s': %m", value); |
57fa1d09 TG |
241 | } else if (streq(key, "DEVGID")) { |
242 | r = device_set_devgid(device, value); | |
243 | if (r < 0) | |
c7d54dae | 244 | return log_device_debug_errno(device, r, "sd-device: Failed to set devgid to '%s': %m", value); |
57fa1d09 | 245 | } else if (streq(key, "DEVLINKS")) { |
4df4fd11 TG |
246 | const char *word, *state; |
247 | size_t l; | |
57fa1d09 | 248 | |
4df4fd11 | 249 | FOREACH_WORD(word, l, value, state) { |
de9b34b6 | 250 | char devlink[l + 1]; |
57fa1d09 | 251 | |
de9b34b6 TG |
252 | strncpy(devlink, word, l); |
253 | devlink[l] = '\0'; | |
57fa1d09 | 254 | |
4df4fd11 | 255 | r = device_add_devlink(device, devlink); |
57fa1d09 | 256 | if (r < 0) |
c7d54dae | 257 | return log_device_debug_errno(device, r, "sd-device: Failed to add devlink '%s': %m", devlink); |
57fa1d09 TG |
258 | } |
259 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
260 | const char *word, *state; |
261 | size_t l; | |
57fa1d09 | 262 | |
4df4fd11 | 263 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
de9b34b6 | 264 | char tag[l + 1]; |
57fa1d09 | 265 | |
db2f8a2e | 266 | (void) strncpy(tag, word, l); |
de9b34b6 | 267 | tag[l] = '\0'; |
57fa1d09 | 268 | |
4df4fd11 | 269 | r = device_add_tag(device, tag); |
57fa1d09 | 270 | if (r < 0) |
c7d54dae | 271 | return log_device_debug_errno(device, r, "sd-device: Failed to add tag '%s': %m", tag); |
57fa1d09 TG |
272 | } |
273 | } else { | |
274 | r = device_add_property_internal(device, key, value); | |
275 | if (r < 0) | |
c7d54dae | 276 | return log_device_debug_errno(device, r, "sd-device: Failed to add property '%s=%s': %m", key, value); |
57fa1d09 TG |
277 | } |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static const char* const device_action_table[_DEVICE_ACTION_MAX] = { | |
283 | [DEVICE_ACTION_ADD] = "add", | |
284 | [DEVICE_ACTION_REMOVE] = "remove", | |
285 | [DEVICE_ACTION_CHANGE] = "change", | |
286 | [DEVICE_ACTION_MOVE] = "move", | |
287 | [DEVICE_ACTION_ONLINE] = "online", | |
288 | [DEVICE_ACTION_OFFLINE] = "offline", | |
9a39e1ce LP |
289 | [DEVICE_ACTION_BIND] = "bind", |
290 | [DEVICE_ACTION_UNBIND] = "unbind", | |
57fa1d09 TG |
291 | }; |
292 | ||
293 | DEFINE_STRING_TABLE_LOOKUP(device_action, DeviceAction); | |
294 | ||
295 | static int device_append(sd_device *device, char *key, const char **_major, const char **_minor, uint64_t *_seqnum, | |
296 | DeviceAction *_action) { | |
297 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
298 | uint64_t seqnum = 0; | |
299 | const char *major = NULL, *minor = NULL; | |
300 | char *value; | |
301 | int r; | |
302 | ||
303 | assert(device); | |
304 | assert(key); | |
305 | assert(_major); | |
306 | assert(_minor); | |
307 | assert(_seqnum); | |
308 | assert(_action); | |
309 | ||
310 | value = strchr(key, '='); | |
311 | if (!value) { | |
c7d54dae | 312 | log_device_debug(device, "sd-device: Not a key-value pair: '%s'", key); |
57fa1d09 TG |
313 | return -EINVAL; |
314 | } | |
315 | ||
316 | *value = '\0'; | |
317 | ||
318 | value++; | |
319 | ||
320 | if (streq(key, "MAJOR")) | |
321 | major = value; | |
322 | else if (streq(key, "MINOR")) | |
323 | minor = value; | |
324 | else { | |
325 | if (streq(key, "ACTION")) { | |
326 | action = device_action_from_string(value); | |
327 | if (action == _DEVICE_ACTION_INVALID) | |
328 | return -EINVAL; | |
56c886dc DT |
329 | /* FIXME: remove once we no longer flush previuos state for each action */ |
330 | if (action == DEVICE_ACTION_BIND || action == DEVICE_ACTION_UNBIND) { | |
331 | static bool warned; | |
332 | if (!warned) { | |
333 | log_device_debug(device, "sd-device: ignoring actions 'bind' and 'unbind'"); | |
334 | warned = true; | |
335 | } | |
336 | return -EINVAL; | |
337 | } | |
57fa1d09 TG |
338 | } else if (streq(key, "SEQNUM")) { |
339 | r = safe_atou64(value, &seqnum); | |
340 | if (r < 0) | |
341 | return r; | |
342 | else if (seqnum == 0) | |
343 | /* kernel only sends seqnum > 0 */ | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
401cb614 | 347 | r = device_amend(device, key, value); |
57fa1d09 TG |
348 | if (r < 0) |
349 | return r; | |
350 | } | |
351 | ||
352 | if (major != 0) | |
353 | *_major = major; | |
354 | ||
355 | if (minor != 0) | |
356 | *_minor = minor; | |
357 | ||
358 | if (action != _DEVICE_ACTION_INVALID) | |
359 | *_action = action; | |
360 | ||
361 | if (seqnum > 0) | |
362 | *_seqnum = seqnum; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | void device_seal(sd_device *device) { | |
368 | assert(device); | |
369 | ||
370 | device->sealed = true; | |
371 | } | |
372 | ||
373 | static int device_verify(sd_device *device, DeviceAction action, uint64_t seqnum) { | |
374 | assert(device); | |
375 | ||
376 | if (!device->devpath || !device->subsystem || action == _DEVICE_ACTION_INVALID || seqnum == 0) { | |
c7d54dae | 377 | log_device_debug(device, "sd-device: Device created from strv or nulstr lacks devpath, subsystem, action or seqnum."); |
57fa1d09 TG |
378 | return -EINVAL; |
379 | } | |
380 | ||
381 | device->sealed = true; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | int device_new_from_strv(sd_device **ret, char **strv) { | |
4afd3348 | 387 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
388 | char **key; |
389 | const char *major = NULL, *minor = NULL; | |
390 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
8d578a2e | 391 | uint64_t seqnum = 0; |
57fa1d09 TG |
392 | int r; |
393 | ||
394 | assert(ret); | |
395 | assert(strv); | |
396 | ||
397 | r = device_new_aux(&device); | |
398 | if (r < 0) | |
399 | return r; | |
400 | ||
401 | STRV_FOREACH(key, strv) { | |
402 | r = device_append(device, *key, &major, &minor, &seqnum, &action); | |
403 | if (r < 0) | |
404 | return r; | |
405 | } | |
406 | ||
407 | if (major) { | |
408 | r = device_set_devnum(device, major, minor); | |
409 | if (r < 0) | |
c7d54dae | 410 | return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor); |
57fa1d09 TG |
411 | } |
412 | ||
413 | r = device_verify(device, action, seqnum); | |
414 | if (r < 0) | |
415 | return r; | |
416 | ||
1cc6c93a | 417 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
422 | int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { | |
4afd3348 | 423 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
424 | const char *major = NULL, *minor = NULL; |
425 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
8d578a2e | 426 | uint64_t seqnum = 0; |
57fa1d09 TG |
427 | unsigned i = 0; |
428 | int r; | |
429 | ||
430 | assert(ret); | |
431 | assert(nulstr); | |
432 | assert(len); | |
433 | ||
434 | r = device_new_aux(&device); | |
435 | if (r < 0) | |
436 | return r; | |
437 | ||
438 | while (i < len) { | |
439 | char *key; | |
440 | const char *end; | |
441 | ||
442 | key = (char*)&nulstr[i]; | |
443 | end = memchr(key, '\0', len - i); | |
444 | if (!end) { | |
c7d54dae | 445 | log_device_debug(device, "sd-device: Failed to parse nulstr"); |
57fa1d09 TG |
446 | return -EINVAL; |
447 | } | |
448 | i += end - key + 1; | |
449 | ||
450 | r = device_append(device, key, &major, &minor, &seqnum, &action); | |
451 | if (r < 0) | |
452 | return r; | |
453 | } | |
454 | ||
455 | if (major) { | |
456 | r = device_set_devnum(device, major, minor); | |
457 | if (r < 0) | |
c7d54dae | 458 | return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor); |
57fa1d09 TG |
459 | } |
460 | ||
461 | r = device_verify(device, action, seqnum); | |
462 | if (r < 0) | |
463 | return r; | |
464 | ||
1cc6c93a | 465 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
466 | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static int device_update_properties_bufs(sd_device *device) { | |
471 | const char *val, *prop; | |
ccc1002a TG |
472 | _cleanup_free_ char **buf_strv = NULL; |
473 | _cleanup_free_ uint8_t *buf_nulstr = NULL; | |
d854ba50 | 474 | size_t allocated_nulstr = 0; |
ccc1002a | 475 | size_t nulstr_len = 0, num = 0, i = 0; |
57fa1d09 TG |
476 | |
477 | assert(device); | |
478 | ||
aa20f49a TG |
479 | if (!device->properties_buf_outdated) |
480 | return 0; | |
481 | ||
57fa1d09 TG |
482 | FOREACH_DEVICE_PROPERTY(device, prop, val) { |
483 | size_t len = 0; | |
484 | ||
485 | len = strlen(prop) + 1 + strlen(val); | |
486 | ||
487 | buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); | |
488 | if (!buf_nulstr) | |
489 | return -ENOMEM; | |
490 | ||
57fa1d09 TG |
491 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
492 | nulstr_len += len + 1; | |
d854ba50 | 493 | ++num; |
57fa1d09 TG |
494 | } |
495 | ||
ccc1002a TG |
496 | /* build buf_strv from buf_nulstr */ |
497 | buf_strv = new0(char *, num + 1); | |
498 | if (!buf_strv) | |
499 | return -ENOMEM; | |
d854ba50 | 500 | |
d854ba50 | 501 | NULSTR_FOREACH(val, (char*) buf_nulstr) { |
ccc1002a | 502 | buf_strv[i] = (char *) val; |
d854ba50 MP |
503 | assert(i < num); |
504 | i++; | |
505 | } | |
57fa1d09 | 506 | |
f9ecfd3b | 507 | free_and_replace(device->properties_nulstr, buf_nulstr); |
ccc1002a | 508 | device->properties_nulstr_len = nulstr_len; |
f9ecfd3b | 509 | free_and_replace(device->properties_strv, buf_strv); |
ccc1002a | 510 | |
57fa1d09 TG |
511 | device->properties_buf_outdated = false; |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
517 | int r; | |
518 | ||
519 | assert(device); | |
520 | assert(nulstr); | |
521 | assert(len); | |
522 | ||
aa20f49a TG |
523 | r = device_update_properties_bufs(device); |
524 | if (r < 0) | |
525 | return r; | |
57fa1d09 TG |
526 | |
527 | *nulstr = device->properties_nulstr; | |
528 | *len = device->properties_nulstr_len; | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
534 | int r; | |
535 | ||
536 | assert(device); | |
537 | assert(strv); | |
538 | ||
539 | r = device_update_properties_bufs(device); | |
540 | if (r < 0) | |
541 | return r; | |
542 | ||
543 | *strv = device->properties_strv; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
549 | int r; | |
550 | ||
551 | assert(device); | |
552 | assert(priority); | |
553 | ||
554 | r = device_read_db(device); | |
555 | if (r < 0) | |
556 | return r; | |
557 | ||
558 | *priority = device->devlink_priority; | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | int device_get_watch_handle(sd_device *device, int *handle) { | |
564 | int r; | |
565 | ||
566 | assert(device); | |
57fa1d09 TG |
567 | |
568 | r = device_read_db(device); | |
569 | if (r < 0) | |
570 | return r; | |
571 | ||
dcfbde3a YW |
572 | if (device->watch_handle < 0) |
573 | return -ENOENT; | |
574 | ||
78ffb476 YW |
575 | if (handle) |
576 | *handle = device->watch_handle; | |
57fa1d09 TG |
577 | |
578 | return 0; | |
579 | } | |
580 | ||
581 | void device_set_watch_handle(sd_device *device, int handle) { | |
582 | assert(device); | |
583 | ||
584 | device->watch_handle = handle; | |
585 | } | |
586 | ||
587 | int device_rename(sd_device *device, const char *name) { | |
588 | _cleanup_free_ char *dirname = NULL; | |
589 | char *new_syspath; | |
590 | const char *interface; | |
591 | int r; | |
592 | ||
593 | assert(device); | |
594 | assert(name); | |
595 | ||
596 | dirname = dirname_malloc(device->syspath); | |
597 | if (!dirname) | |
598 | return -ENOMEM; | |
599 | ||
600 | new_syspath = strjoina(dirname, "/", name); | |
601 | ||
602 | /* the user must trust that the new name is correct */ | |
603 | r = device_set_syspath(device, new_syspath, false); | |
604 | if (r < 0) | |
605 | return r; | |
606 | ||
607 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
608 | if (r >= 0) { | |
f7b1c8d1 EV |
609 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ |
610 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
57fa1d09 TG |
611 | if (r < 0) |
612 | return r; | |
613 | ||
f7b1c8d1 | 614 | r = device_add_property_internal(device, "INTERFACE", name); |
57fa1d09 TG |
615 | if (r < 0) |
616 | return r; | |
617 | } else if (r != -ENOENT) | |
618 | return r; | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 624 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
625 | int r; |
626 | ||
627 | assert(old_device); | |
628 | assert(new_device); | |
629 | ||
630 | r = device_new_aux(&ret); | |
631 | if (r < 0) | |
632 | return r; | |
633 | ||
634 | r = device_set_syspath(ret, old_device->syspath, false); | |
635 | if (r < 0) | |
636 | return r; | |
637 | ||
638 | r = device_set_subsystem(ret, old_device->subsystem); | |
639 | if (r < 0) | |
640 | return r; | |
641 | ||
642 | ret->devnum = old_device->devnum; | |
643 | ||
1cc6c93a | 644 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
645 | |
646 | return 0; | |
647 | } | |
648 | ||
649 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 650 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
651 | int r; |
652 | ||
653 | assert(old_device); | |
654 | assert(new_device); | |
655 | ||
656 | r = device_shallow_clone(old_device, &ret); | |
657 | if (r < 0) | |
658 | return r; | |
659 | ||
660 | r = device_read_db(ret); | |
661 | if (r < 0) | |
662 | return r; | |
663 | ||
664 | ret->sealed = true; | |
665 | ||
1cc6c93a | 666 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
667 | |
668 | return 0; | |
669 | } | |
670 | ||
671 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
4afd3348 | 672 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
673 | int r; |
674 | ||
675 | assert(new_device); | |
676 | assert(syspath); | |
677 | assert(action); | |
678 | ||
679 | r = sd_device_new_from_syspath(&ret, syspath); | |
680 | if (r < 0) | |
681 | return r; | |
682 | ||
683 | r = device_read_uevent_file(ret); | |
684 | if (r < 0) | |
685 | return r; | |
686 | ||
687 | r = device_add_property_internal(ret, "ACTION", action); | |
688 | if (r < 0) | |
689 | return r; | |
690 | ||
1cc6c93a | 691 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
692 | |
693 | return 0; | |
694 | } | |
695 | ||
ad5944d7 YW |
696 | int device_new_from_stat_rdev(sd_device **ret, const struct stat *st) { |
697 | char type; | |
698 | ||
699 | assert(ret); | |
700 | assert(st); | |
701 | ||
702 | if (S_ISBLK(st->st_mode)) | |
703 | type = 'b'; | |
704 | else if (S_ISCHR(st->st_mode)) | |
705 | type = 'c'; | |
706 | else | |
707 | return -ENOTTY; | |
708 | ||
709 | return sd_device_new_from_devnum(ret, type, st->st_rdev); | |
710 | } | |
711 | ||
57fa1d09 TG |
712 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { |
713 | const char *property, *value; | |
714 | int r; | |
715 | ||
716 | assert(device_dst); | |
717 | assert(device_src); | |
718 | ||
719 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
720 | r = device_add_property(device_dst, property, value); | |
721 | if (r < 0) | |
722 | return r; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | void device_cleanup_tags(sd_device *device) { | |
729 | assert(device); | |
730 | ||
731 | set_free_free(device->tags); | |
732 | device->tags = NULL; | |
733 | device->property_tags_outdated = true; | |
313cefa1 | 734 | device->tags_generation++; |
57fa1d09 TG |
735 | } |
736 | ||
737 | void device_cleanup_devlinks(sd_device *device) { | |
738 | assert(device); | |
739 | ||
740 | set_free_free(device->devlinks); | |
741 | device->devlinks = NULL; | |
742 | device->property_devlinks_outdated = true; | |
313cefa1 | 743 | device->devlinks_generation++; |
57fa1d09 TG |
744 | } |
745 | ||
746 | void device_remove_tag(sd_device *device, const char *tag) { | |
747 | assert(device); | |
748 | assert(tag); | |
749 | ||
750 | free(set_remove(device->tags, tag)); | |
751 | device->property_tags_outdated = true; | |
313cefa1 | 752 | device->tags_generation++; |
57fa1d09 TG |
753 | } |
754 | ||
755 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
756 | const char *id; | |
757 | char *path; | |
758 | int r; | |
759 | ||
760 | assert(device); | |
761 | assert(tag); | |
762 | ||
763 | r = device_get_id_filename(device, &id); | |
764 | if (r < 0) | |
765 | return r; | |
766 | ||
767 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
768 | ||
769 | if (add) { | |
770 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
771 | if (r < 0) | |
772 | return r; | |
773 | } else { | |
774 | r = unlink(path); | |
775 | if (r < 0 && errno != ENOENT) | |
776 | return -errno; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
783 | const char *tag; | |
784 | int r = 0, k; | |
785 | ||
786 | if (add && device_old) { | |
787 | /* delete possible left-over tags */ | |
788 | FOREACH_DEVICE_TAG(device_old, tag) { | |
789 | if (!sd_device_has_tag(device, tag)) { | |
790 | k = device_tag(device_old, tag, false); | |
791 | if (r >= 0 && k < 0) | |
792 | r = k; | |
793 | } | |
794 | } | |
795 | } | |
796 | ||
797 | FOREACH_DEVICE_TAG(device, tag) { | |
798 | k = device_tag(device, tag, add); | |
799 | if (r >= 0 && k < 0) | |
800 | r = k; | |
801 | } | |
802 | ||
803 | return r; | |
804 | } | |
805 | ||
806 | static bool device_has_info(sd_device *device) { | |
807 | assert(device); | |
808 | ||
809 | if (!set_isempty(device->devlinks)) | |
810 | return true; | |
811 | ||
812 | if (device->devlink_priority != 0) | |
813 | return true; | |
814 | ||
815 | if (!ordered_hashmap_isempty(device->properties_db)) | |
816 | return true; | |
817 | ||
818 | if (!set_isempty(device->tags)) | |
819 | return true; | |
820 | ||
821 | if (device->watch_handle >= 0) | |
822 | return true; | |
823 | ||
824 | return false; | |
825 | } | |
826 | ||
827 | void device_set_db_persist(sd_device *device) { | |
828 | assert(device); | |
829 | ||
830 | device->db_persist = true; | |
831 | } | |
832 | ||
833 | int device_update_db(sd_device *device) { | |
834 | const char *id; | |
835 | char *path; | |
836 | _cleanup_fclose_ FILE *f = NULL; | |
837 | _cleanup_free_ char *path_tmp = NULL; | |
838 | bool has_info; | |
839 | int r; | |
840 | ||
841 | assert(device); | |
842 | ||
843 | has_info = device_has_info(device); | |
844 | ||
845 | r = device_get_id_filename(device, &id); | |
846 | if (r < 0) | |
847 | return r; | |
848 | ||
849 | path = strjoina("/run/udev/data/", id); | |
850 | ||
851 | /* do not store anything for otherwise empty devices */ | |
852 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
853 | r = unlink(path); | |
854 | if (r < 0 && errno != ENOENT) | |
855 | return -errno; | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | /* write a database file */ | |
861 | r = mkdir_parents(path, 0755); | |
862 | if (r < 0) | |
863 | return r; | |
864 | ||
865 | r = fopen_temporary(path, &f, &path_tmp); | |
866 | if (r < 0) | |
867 | return r; | |
868 | ||
869 | /* | |
870 | * set 'sticky' bit to indicate that we should not clean the | |
871 | * database when we transition from initramfs to the real root | |
872 | */ | |
873 | if (device->db_persist) { | |
874 | r = fchmod(fileno(f), 01644); | |
875 | if (r < 0) { | |
876 | r = -errno; | |
877 | goto fail; | |
878 | } | |
879 | } else { | |
880 | r = fchmod(fileno(f), 0644); | |
881 | if (r < 0) { | |
882 | r = -errno; | |
883 | goto fail; | |
884 | } | |
885 | } | |
886 | ||
887 | if (has_info) { | |
888 | const char *property, *value, *tag; | |
889 | Iterator i; | |
890 | ||
891 | if (major(device->devnum) > 0) { | |
892 | const char *devlink; | |
893 | ||
894 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
fbd0b64f | 895 | fprintf(f, "S:%s\n", devlink + STRLEN("/dev/")); |
57fa1d09 TG |
896 | |
897 | if (device->devlink_priority != 0) | |
898 | fprintf(f, "L:%i\n", device->devlink_priority); | |
899 | ||
900 | if (device->watch_handle >= 0) | |
901 | fprintf(f, "W:%i\n", device->watch_handle); | |
902 | } | |
903 | ||
904 | if (device->usec_initialized > 0) | |
905 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
906 | ||
907 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
908 | fprintf(f, "E:%s=%s\n", property, value); | |
909 | ||
910 | FOREACH_DEVICE_TAG(device, tag) | |
911 | fprintf(f, "G:%s\n", tag); | |
912 | } | |
913 | ||
914 | r = fflush_and_check(f); | |
915 | if (r < 0) | |
916 | goto fail; | |
917 | ||
918 | r = rename(path_tmp, path); | |
919 | if (r < 0) { | |
920 | r = -errno; | |
921 | goto fail; | |
922 | } | |
923 | ||
c7d54dae YW |
924 | log_device_debug(device, "sd-device: Created %s file '%s' for '%s'", has_info ? "db" : "empty", |
925 | path, device->devpath); | |
57fa1d09 TG |
926 | |
927 | return 0; | |
928 | ||
929 | fail: | |
dacd6cee LP |
930 | (void) unlink(path); |
931 | (void) unlink(path_tmp); | |
57fa1d09 | 932 | |
c7d54dae | 933 | return log_device_debug_errno(device, r, "sd-device: Failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath); |
57fa1d09 TG |
934 | } |
935 | ||
936 | int device_delete_db(sd_device *device) { | |
937 | const char *id; | |
938 | char *path; | |
939 | int r; | |
940 | ||
941 | assert(device); | |
942 | ||
943 | r = device_get_id_filename(device, &id); | |
944 | if (r < 0) | |
945 | return r; | |
946 | ||
947 | path = strjoina("/run/udev/data/", id); | |
948 | ||
949 | r = unlink(path); | |
950 | if (r < 0 && errno != ENOENT) | |
951 | return -errno; | |
952 | ||
953 | return 0; | |
954 | } |