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Commit | Line | Data |
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2232cac8 GKH |
1 | /* |
2 | * namedev.c | |
3 | * | |
4 | * Userspace devfs | |
5 | * | |
6 | * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <stddef.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <stdio.h> | |
28 | #include <fcntl.h> | |
29 | #include <ctype.h> | |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
616a7078 | 32 | #include <time.h> |
c27e6911 | 33 | #include <sys/wait.h> |
dac056aa | 34 | #include <sys/stat.h> |
2232cac8 GKH |
35 | |
36 | #include "list.h" | |
37 | #include "udev.h" | |
38 | #include "udev_version.h" | |
54988802 | 39 | #include "logging.h" |
2232cac8 | 40 | #include "namedev.h" |
185a35a4 | 41 | #include "libsysfs/libsysfs.h" |
2023350e | 42 | #include "klibc_fixups.h" |
2232cac8 | 43 | |
19feb351 | 44 | LIST_HEAD(config_device_list); |
61219c75 | 45 | LIST_HEAD(perm_device_list); |
2232cac8 | 46 | |
9f1da361 KS |
47 | /* compare string with pattern (supports * ? [0-9] [!A-Z]) */ |
48 | static int strcmp_pattern(const char *p, const char *s) | |
c124eafa | 49 | { |
9f1da361 KS |
50 | if (*s == '\0') { |
51 | while (*p == '*') | |
52 | p++; | |
53 | return (*p != '\0'); | |
54 | } | |
55 | switch (*p) { | |
56 | case '[': | |
57 | { | |
58 | int not = 0; | |
59 | p++; | |
60 | if (*p == '!') { | |
61 | not = 1; | |
62 | p++; | |
63 | } | |
64 | while (*p && (*p != ']')) { | |
65 | int match = 0; | |
66 | if (p[1] == '-') { | |
67 | if ((*s >= *p) && (*s <= p[2])) | |
68 | match = 1; | |
69 | p += 3; | |
70 | } else { | |
71 | match = (*p == *s); | |
72 | p++; | |
73 | } | |
74 | if (match ^ not) { | |
75 | while (*p && (*p != ']')) | |
76 | p++; | |
77 | return strcmp_pattern(p+1, s+1); | |
78 | } | |
79 | } | |
80 | } | |
81 | break; | |
82 | case '*': | |
83 | if (strcmp_pattern(p, s+1)) | |
84 | return strcmp_pattern(p+1, s); | |
85 | return 0; | |
86 | case '\0': | |
87 | if (*s == '\0') { | |
88 | return 0; | |
89 | } | |
90 | break; | |
91 | default: | |
92 | if ((*p == *s) || (*p == '?')) | |
93 | return strcmp_pattern(p+1, s+1); | |
94 | break; | |
95 | } | |
96 | return 1; | |
c124eafa KS |
97 | } |
98 | ||
2232cac8 GKH |
99 | #define copy_var(a, b, var) \ |
100 | if (b->var) \ | |
469c7cff | 101 | a->var = b->var; |
2232cac8 GKH |
102 | |
103 | #define copy_string(a, b, var) \ | |
104 | if (strlen(b->var)) \ | |
469c7cff | 105 | strcpy(a->var, b->var); |
2232cac8 | 106 | |
61219c75 GKH |
107 | int add_perm_dev(struct perm_device *new_dev) |
108 | { | |
843d1a84 | 109 | struct perm_device *dev; |
61219c75 GKH |
110 | struct perm_device *tmp_dev; |
111 | ||
112 | /* update the values if we already have the device */ | |
843d1a84 | 113 | list_for_each_entry(dev, &perm_device_list, node) { |
61219c75 GKH |
114 | if (strcmp_pattern(new_dev->name, dev->name)) |
115 | continue; | |
116 | copy_var(dev, new_dev, mode); | |
117 | copy_string(dev, new_dev, owner); | |
118 | copy_string(dev, new_dev, group); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | /* not found, add new structure to the perm list */ | |
123 | tmp_dev = malloc(sizeof(*tmp_dev)); | |
124 | if (!tmp_dev) | |
125 | return -ENOMEM; | |
126 | memcpy(tmp_dev, new_dev, sizeof(*tmp_dev)); | |
127 | list_add_tail(&tmp_dev->node, &perm_device_list); | |
128 | //dump_perm_dev(tmp_dev); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static struct perm_device *find_perm(char *name) | |
133 | { | |
843d1a84 | 134 | struct perm_device *perm; |
61219c75 | 135 | |
843d1a84 | 136 | list_for_each_entry(perm, &perm_device_list, node) { |
61219c75 GKH |
137 | if (strcmp_pattern(perm->name, name)) |
138 | continue; | |
139 | return perm; | |
140 | } | |
141 | return NULL; | |
142 | } | |
143 | ||
765cbd97 | 144 | static mode_t get_default_mode(void) |
185a35a4 | 145 | { |
89571022 GKH |
146 | mode_t mode = 0600; /* default to owner rw only */ |
147 | ||
267f534d | 148 | if (strlen(default_mode_str) != 0) |
89571022 | 149 | mode = strtol(default_mode_str, NULL, 8); |
267f534d | 150 | |
89571022 | 151 | return mode; |
185a35a4 GKH |
152 | } |
153 | ||
267f534d | 154 | static char *get_default_owner(void) |
74c73ef9 | 155 | { |
267f534d | 156 | if (strlen(default_owner_str) == 0) |
74c73ef9 | 157 | strncpy(default_owner_str, "root", OWNER_SIZE); |
267f534d | 158 | |
74c73ef9 | 159 | return default_owner_str; |
160 | } | |
161 | ||
267f534d | 162 | static char *get_default_group(void) |
74c73ef9 | 163 | { |
267f534d | 164 | if (strlen(default_group_str) == 0) |
74c73ef9 | 165 | strncpy(default_group_str, "root", GROUP_SIZE); |
267f534d | 166 | |
74c73ef9 | 167 | return default_group_str; |
168 | } | |
169 | ||
f3b04a2e GKH |
170 | static void apply_format(struct udevice *udev, unsigned char *string) |
171 | { | |
b1c5e333 | 172 | char temp[NAME_SIZE]; |
8ffb636f | 173 | char temp1[NAME_SIZE]; |
b1c5e333 | 174 | char *tail; |
f3b04a2e | 175 | char *pos; |
b1c5e333 KS |
176 | char *pos2; |
177 | char *pos3; | |
178 | int num; | |
f3b04a2e | 179 | |
8ffb636f | 180 | pos = string; |
f3b04a2e | 181 | while (1) { |
b1c5e333 | 182 | num = 0; |
8ffb636f | 183 | pos = strchr(pos, '%'); |
f3b04a2e GKH |
184 | |
185 | if (pos) { | |
8ffb636f | 186 | pos[0] = '\0'; |
b1c5e333 KS |
187 | tail = pos+1; |
188 | if (isdigit(tail[0])) { | |
189 | num = (int) strtoul(&pos[1], &tail, 10); | |
190 | if (tail == NULL) { | |
191 | dbg("format parsing error '%s'", pos+1); | |
192 | break; | |
193 | } | |
194 | } | |
8ffb636f | 195 | strfieldcpy(temp, tail+1); |
b1c5e333 KS |
196 | |
197 | switch (tail[0]) { | |
f3b04a2e GKH |
198 | case 'b': |
199 | if (strlen(udev->bus_id) == 0) | |
200 | break; | |
6968d494 | 201 | strcat(pos, udev->bus_id); |
f3b04a2e GKH |
202 | dbg("substitute bus_id '%s'", udev->bus_id); |
203 | break; | |
3e540368 KS |
204 | case 'k': |
205 | if (strlen(udev->kernel_name) == 0) | |
206 | break; | |
207 | strcat(pos, udev->kernel_name); | |
208 | dbg("substitute kernel name '%s'", udev->kernel_name); | |
209 | break; | |
f3b04a2e GKH |
210 | case 'n': |
211 | if (strlen(udev->kernel_number) == 0) | |
212 | break; | |
213 | strcat(pos, udev->kernel_number); | |
214 | dbg("substitute kernel number '%s'", udev->kernel_number); | |
215 | break; | |
216 | case 'm': | |
217 | sprintf(pos, "%u", udev->minor); | |
218 | dbg("substitute minor number '%u'", udev->minor); | |
219 | break; | |
220 | case 'M': | |
221 | sprintf(pos, "%u", udev->major); | |
222 | dbg("substitute major number '%u'", udev->major); | |
223 | break; | |
224 | case 'c': | |
ac28b86d | 225 | if (strlen(udev->program_result) == 0) |
f3b04a2e | 226 | break; |
b1c5e333 KS |
227 | if (num) { |
228 | /* get part of return string */ | |
8ffb636f KS |
229 | strncpy(temp1, udev->program_result, sizeof(temp1)); |
230 | pos2 = temp1; | |
b1c5e333 KS |
231 | while (num) { |
232 | num--; | |
233 | pos3 = strsep(&pos2, " "); | |
234 | if (pos3 == NULL) { | |
ac28b86d | 235 | dbg("requested part of result string not found"); |
b1c5e333 KS |
236 | break; |
237 | } | |
238 | } | |
647c8fc4 KS |
239 | if (pos3) { |
240 | strcat(pos, pos3); | |
ac28b86d | 241 | dbg("substitute part of result string '%s'", pos3); |
647c8fc4 | 242 | } |
b1c5e333 | 243 | } else { |
ac28b86d KS |
244 | strcat(pos, udev->program_result); |
245 | dbg("substitute result string '%s'", udev->program_result); | |
b1c5e333 | 246 | } |
f3b04a2e | 247 | break; |
8ffb636f KS |
248 | case '%': |
249 | strcat(pos, "%"); | |
250 | pos++; | |
251 | break; | |
f3b04a2e GKH |
252 | default: |
253 | dbg("unknown substitution type '%%%c'", pos[1]); | |
254 | break; | |
255 | } | |
8ffb636f | 256 | strcat(string, temp); |
f3b04a2e GKH |
257 | } else |
258 | break; | |
259 | } | |
260 | } | |
261 | ||
dac056aa GKH |
262 | static struct bus_file { |
263 | char *bus; | |
264 | char *file; | |
265 | } bus_files[] = { | |
266 | { .bus = "scsi", .file = "vendor" }, | |
267 | { .bus = "usb", .file = "idVendor" }, | |
b7824727 | 268 | { .bus = "usb-serial", .file = "detach_state" }, |
2441c207 | 269 | { .bus = "ide", .file = "detach_state" }, |
48076332 | 270 | { .bus = "pci", .file = "vendor" }, |
dac056aa GKH |
271 | {} |
272 | }; | |
273 | ||
274 | #define SECONDS_TO_WAIT_FOR_FILE 10 | |
275 | static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device) | |
276 | { | |
277 | /* sleep until we see the file for this specific bus type show up this | |
278 | * is needed because we can easily out-run the kernel in looking for | |
279 | * these files before the paticular subsystem has created them in the | |
280 | * sysfs tree properly. | |
281 | * | |
282 | * And people thought that the /sbin/hotplug event system was going to | |
283 | * be slow, poo on you for arguing that before even testing it... | |
284 | */ | |
285 | struct bus_file *b = &bus_files[0]; | |
286 | struct sysfs_attribute *tmpattr; | |
287 | int loop; | |
288 | ||
289 | while (1) { | |
290 | if (b->bus == NULL) | |
291 | break; | |
292 | if (strcmp(sysfs_device->bus, b->bus) == 0) { | |
293 | tmpattr = NULL; | |
294 | loop = SECONDS_TO_WAIT_FOR_FILE; | |
295 | while (loop--) { | |
296 | dbg("looking for file '%s' on bus '%s'", b->file, b->bus); | |
297 | tmpattr = sysfs_get_device_attr(sysfs_device, b->file); | |
298 | if (tmpattr) { | |
299 | /* found it! */ | |
300 | goto exit; | |
301 | } | |
302 | /* sleep to give the kernel a chance to create the file */ | |
303 | sleep(1); | |
304 | } | |
54988802 | 305 | dbg("timed out waiting for '%s' file, continuing on anyway...", b->file); |
dac056aa GKH |
306 | goto exit; |
307 | } | |
308 | b++; | |
309 | } | |
54988802 | 310 | dbg("did not find bus type '%s' on list of bus_id_files, contact greg@kroah.com", sysfs_device->bus); |
dac056aa GKH |
311 | exit: |
312 | return; /* here to prevent compiler warning... */ | |
313 | } | |
19dc5d4c | 314 | |
ac28b86d | 315 | static int execute_program(char *path, char *value, int len) |
c27e6911 PM |
316 | { |
317 | int retval; | |
318 | int res; | |
319 | int status; | |
320 | int fds[2]; | |
321 | pid_t pid; | |
322 | int value_set = 0; | |
323 | char buffer[256]; | |
20524642 | 324 | char *pos; |
7e5f7397 | 325 | char *args[PROGRAM_MAXARG]; |
bc434511 | 326 | int i; |
c27e6911 | 327 | |
ac28b86d | 328 | dbg("executing '%s'", path); |
c27e6911 PM |
329 | retval = pipe(fds); |
330 | if (retval != 0) { | |
331 | dbg("pipe failed"); | |
332 | return -1; | |
333 | } | |
334 | pid = fork(); | |
335 | if (pid == -1) { | |
336 | dbg("fork failed"); | |
337 | return -1; | |
338 | } | |
339 | ||
340 | if (pid == 0) { | |
8f43a65e | 341 | /* child */ |
c27e6911 PM |
342 | close(STDOUT_FILENO); |
343 | dup(fds[1]); /* dup write side of pipe to STDOUT */ | |
41397661 | 344 | if (strchr(path, ' ')) { |
ac28b86d | 345 | /* exec with arguments */ |
41397661 | 346 | pos = path; |
7e5f7397 | 347 | for (i=0; i < PROGRAM_MAXARG-1; i++) { |
20524642 | 348 | args[i] = strsep(&pos, " "); |
bc434511 KS |
349 | if (args[i] == NULL) |
350 | break; | |
351 | } | |
352 | if (args[i]) { | |
53dc383e | 353 | dbg("too many args - %d", i); |
bc434511 KS |
354 | args[i] = NULL; |
355 | } | |
356 | retval = execve(args[0], args, main_envp); | |
357 | } else { | |
41397661 | 358 | retval = execve(path, main_argv, main_envp); |
bc434511 | 359 | } |
c27e6911 PM |
360 | if (retval != 0) { |
361 | dbg("child execve failed"); | |
362 | exit(1); | |
363 | } | |
364 | return -1; /* avoid compiler warning */ | |
365 | } else { | |
8f43a65e | 366 | /* parent reads from fds[0] */ |
c27e6911 PM |
367 | close(fds[1]); |
368 | retval = 0; | |
369 | while (1) { | |
370 | res = read(fds[0], buffer, sizeof(buffer) - 1); | |
371 | if (res <= 0) | |
372 | break; | |
373 | buffer[res] = '\0'; | |
374 | if (res > len) { | |
ac28b86d | 375 | dbg("result len %d too short", len); |
c27e6911 PM |
376 | retval = -1; |
377 | } | |
378 | if (value_set) { | |
ac28b86d | 379 | dbg("result value already set"); |
c27e6911 PM |
380 | retval = -1; |
381 | } else { | |
382 | value_set = 1; | |
383 | strncpy(value, buffer, len); | |
20524642 KS |
384 | pos = value + strlen(value)-1; |
385 | if (pos[0] == '\n') | |
386 | pos[0] = '\0'; | |
ac28b86d | 387 | dbg("result is '%s'", value); |
c27e6911 PM |
388 | } |
389 | } | |
390 | close(fds[0]); | |
391 | res = wait(&status); | |
392 | if (res < 0) { | |
393 | dbg("wait failed result %d", res); | |
394 | retval = -1; | |
395 | } | |
396 | ||
397 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { | |
ac28b86d | 398 | dbg("exec program status 0x%x", status); |
c27e6911 PM |
399 | retval = -1; |
400 | } | |
401 | } | |
402 | return retval; | |
403 | } | |
404 | ||
ac28b86d | 405 | static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair) |
ca1cc0fe GKH |
406 | { |
407 | struct sysfs_attribute *tmpattr = NULL; | |
a8b01705 GKH |
408 | char *c; |
409 | ||
410 | if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0')) | |
411 | return -ENODEV; | |
412 | ||
413 | dbg("look for device attribute '%s'", pair->file); | |
414 | /* try to find the attribute in the class device directory */ | |
415 | tmpattr = sysfs_get_classdev_attr(class_dev, pair->file); | |
416 | if (tmpattr) | |
417 | goto label_found; | |
418 | ||
419 | /* look in the class device directory if present */ | |
420 | if (sysfs_device) { | |
421 | tmpattr = sysfs_get_device_attr(sysfs_device, pair->file); | |
422 | if (tmpattr) | |
423 | goto label_found; | |
424 | } | |
a8b01705 GKH |
425 | return -ENODEV; |
426 | ||
427 | label_found: | |
428 | c = tmpattr->value + strlen(tmpattr->value)-1; | |
429 | if (*c == '\n') | |
430 | *c = 0x00; | |
431 | dbg("compare attribute '%s' value '%s' with '%s'", | |
432 | pair->file, tmpattr->value, pair->value); | |
433 | if (strcmp_pattern(pair->value, tmpattr->value) != 0) | |
434 | return -ENODEV; | |
435 | ||
436 | dbg("found matching attribute '%s' with value '%s'", | |
437 | pair->file, pair->value); | |
438 | return 0; | |
439 | } | |
440 | ||
ac28b86d | 441 | static int match_sysfs_pairs(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
a8b01705 GKH |
442 | { |
443 | struct sysfs_pair *pair; | |
a8b01705 | 444 | int i; |
137af0cc | 445 | |
ac28b86d KS |
446 | for (i = 0; i < MAX_SYSFS_PAIRS; ++i) { |
447 | pair = &dev->sysfs_pair[i]; | |
448 | if ((pair->file[0] == '\0') || (pair->value[0] == '\0')) | |
449 | break; | |
450 | if (compare_sysfs_attribute(class_dev, sysfs_device, pair) != 0) { | |
451 | dbg("sysfs attribute doesn't match"); | |
452 | return -ENODEV; | |
ca1cc0fe | 453 | } |
ca1cc0fe | 454 | } |
ac28b86d KS |
455 | |
456 | return 0; | |
ca1cc0fe GKH |
457 | } |
458 | ||
ac28b86d | 459 | static int match_id(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
ca1cc0fe | 460 | { |
ca1cc0fe GKH |
461 | char path[SYSFS_PATH_MAX]; |
462 | int found; | |
463 | char *temp = NULL; | |
464 | ||
1f7148c7 | 465 | /* we have to have a sysfs device for ID to work */ |
ca1cc0fe GKH |
466 | if (!sysfs_device) |
467 | return -ENODEV; | |
468 | ||
ac28b86d KS |
469 | found = 0; |
470 | strfieldcpy(path, sysfs_device->path); | |
471 | temp = strrchr(path, '/'); | |
472 | dbg("search '%s' in '%s', path='%s'", dev->id, temp, path); | |
473 | if (strstr(temp, dev->id) != NULL) { | |
474 | found = 1; | |
475 | } else { | |
476 | *temp = 0x00; | |
ca1cc0fe | 477 | temp = strrchr(path, '/'); |
19feb351 | 478 | dbg("search '%s' in '%s', path='%s'", dev->id, temp, path); |
ac28b86d | 479 | if (strstr(temp, dev->id) != NULL) |
ca1cc0fe | 480 | found = 1; |
ca1cc0fe | 481 | } |
ac28b86d KS |
482 | if (!found) { |
483 | dbg("id doesn't match"); | |
484 | return -ENODEV; | |
485 | } | |
486 | ||
487 | return 0; | |
ca1cc0fe GKH |
488 | } |
489 | ||
ac28b86d | 490 | static int match_place(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
8c51bbfe | 491 | { |
8c51bbfe GKH |
492 | char path[SYSFS_PATH_MAX]; |
493 | int found; | |
494 | char *temp = NULL; | |
495 | ||
1f7148c7 | 496 | /* we have to have a sysfs device for PLACE to work */ |
8c51bbfe GKH |
497 | if (!sysfs_device) |
498 | return -ENODEV; | |
499 | ||
ac28b86d KS |
500 | found = 0; |
501 | strfieldcpy(path, sysfs_device->path); | |
502 | temp = strrchr(path, '/'); | |
503 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); | |
504 | if (strstr(temp, dev->place) != NULL) { | |
505 | found = 1; | |
506 | } else { | |
507 | *temp = 0x00; | |
8c51bbfe | 508 | temp = strrchr(path, '/'); |
19feb351 | 509 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); |
ac28b86d | 510 | if (strstr(temp, dev->place) != NULL) |
8c51bbfe | 511 | found = 1; |
8c51bbfe | 512 | } |
ac28b86d KS |
513 | if (!found) { |
514 | dbg("place doesn't match"); | |
515 | return -ENODEV; | |
120d45d0 | 516 | } |
120d45d0 | 517 | |
ac28b86d | 518 | return 0; |
09e52d51 KS |
519 | } |
520 | ||
dac056aa | 521 | static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev) |
185a35a4 | 522 | { |
dac056aa GKH |
523 | struct sysfs_device *sysfs_device; |
524 | struct sysfs_class_device *class_dev_parent; | |
616a7078 | 525 | struct timespec tspec; |
dac056aa | 526 | int loop; |
07562d6e GKH |
527 | |
528 | /* Figure out where the device symlink is at. For char devices this will | |
529 | * always be in the class_dev->path. But for block devices, it's different. | |
530 | * The main block device will have the device symlink in it's path, but | |
531 | * all partitions have the symlink in its parent directory. | |
532 | * But we need to watch out for block devices that do not have parents, yet | |
533 | * look like a partition (fd0, loop0, etc.) They all do not have a device | |
534 | * symlink yet. We do sit and spin on waiting for them right now, we should | |
535 | * possibly have a whitelist for these devices here... | |
dac056aa | 536 | */ |
616a7078 AM |
537 | class_dev_parent = sysfs_get_classdev_parent(class_dev); |
538 | if (class_dev_parent) | |
539 | dbg("Really a partition"); | |
1edbb8d3 | 540 | |
616a7078 AM |
541 | tspec.tv_sec = 0; |
542 | tspec.tv_nsec = 10000000; /* sleep 10 millisec */ | |
543 | loop = 10; | |
dac056aa | 544 | while (loop--) { |
616a7078 AM |
545 | nanosleep(&tspec, NULL); |
546 | if (class_dev_parent) | |
547 | sysfs_device = sysfs_get_classdev_device(class_dev_parent); | |
548 | else | |
549 | sysfs_device = sysfs_get_classdev_device(class_dev); | |
07562d6e | 550 | |
dac056aa | 551 | if (sysfs_device != NULL) |
616a7078 | 552 | goto device_found; |
7bd22a78 | 553 | } |
54988802 | 554 | dbg("timed out waiting for device symlink, continuing on anyway..."); |
616a7078 AM |
555 | |
556 | device_found: | |
557 | /* We have another issue with just the wait above - the sysfs part of | |
558 | * the kernel may not be quick enough to have created the link to the | |
559 | * device under the "bus" subsystem. Due to this, the sysfs_device->bus | |
560 | * will not contain the actual bus name :( | |
561 | * | |
562 | * Libsysfs now provides a new API sysfs_get_device_bus(), so use it | |
563 | * if needed | |
564 | */ | |
565 | if (sysfs_device) { | |
616a7078 AM |
566 | if (sysfs_device->bus[0] != '\0') |
567 | goto bus_found; | |
267f534d | 568 | |
616a7078 AM |
569 | loop = 10; |
570 | tspec.tv_nsec = 10000000; | |
571 | while (loop--) { | |
572 | nanosleep(&tspec, NULL); | |
573 | sysfs_get_device_bus(sysfs_device); | |
574 | ||
575 | if (sysfs_device->bus[0] != '\0') | |
576 | goto bus_found; | |
577 | } | |
54988802 | 578 | dbg("timed out waiting to find the device bus, continuing on anyway"); |
616a7078 AM |
579 | goto exit; |
580 | bus_found: | |
54988802 | 581 | dbg("device %s is registered with bus '%s'", |
616a7078 AM |
582 | sysfs_device->name, sysfs_device->bus); |
583 | } | |
dac056aa GKH |
584 | exit: |
585 | return sysfs_device; | |
586 | } | |
587 | ||
724257d9 | 588 | static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device) |
dac056aa | 589 | { |
724257d9 | 590 | while (1) { |
ac28b86d KS |
591 | /* check for matching bus value */ |
592 | if (dev->bus[0] != '\0') { | |
593 | if (sysfs_device == NULL) { | |
594 | dbg("device has no bus"); | |
724257d9 | 595 | goto no_good; |
ac28b86d KS |
596 | } |
597 | dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus); | |
598 | if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { | |
599 | dbg(FIELD_BUS " is not matching"); | |
724257d9 | 600 | goto no_good; |
ac28b86d KS |
601 | } else { |
602 | dbg(FIELD_BUS " matches"); | |
603 | } | |
604 | } | |
120d45d0 | 605 | |
ac28b86d KS |
606 | /* check for matching kernel name*/ |
607 | if (dev->kernel[0] != '\0') { | |
608 | dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", dev->kernel, class_dev->name); | |
609 | if (strcmp_pattern(dev->kernel, class_dev->name) != 0) { | |
610 | dbg(FIELD_KERNEL " is not matching"); | |
724257d9 | 611 | goto no_good; |
ac28b86d KS |
612 | } else { |
613 | dbg(FIELD_KERNEL " matches"); | |
614 | } | |
615 | } | |
ca1cc0fe | 616 | |
ac28b86d KS |
617 | /* check for matching bus id */ |
618 | if (dev->id[0] != '\0') { | |
619 | dbg("check " FIELD_ID); | |
620 | if (match_id(dev, class_dev, sysfs_device) != 0) { | |
621 | dbg(FIELD_ID " is not matching"); | |
724257d9 | 622 | goto no_good; |
ac28b86d KS |
623 | } else { |
624 | dbg(FIELD_ID " matches"); | |
625 | } | |
626 | } | |
ca1cc0fe | 627 | |
ac28b86d KS |
628 | /* check for matching place of device */ |
629 | if (dev->place[0] != '\0') { | |
630 | dbg("check " FIELD_PLACE); | |
631 | if (match_place(dev, class_dev, sysfs_device) != 0) { | |
632 | dbg(FIELD_PLACE " is not matching"); | |
724257d9 | 633 | goto no_good; |
ac28b86d KS |
634 | } else { |
635 | dbg(FIELD_PLACE " matches"); | |
636 | } | |
637 | } | |
8c51bbfe | 638 | |
ac28b86d KS |
639 | /* check for matching sysfs pairs */ |
640 | if (dev->sysfs_pair[0].file[0] != '\0') { | |
641 | dbg("check " FIELD_SYSFS " pairs"); | |
642 | if (match_sysfs_pairs(dev, class_dev, sysfs_device) != 0) { | |
643 | dbg(FIELD_SYSFS " is not matching"); | |
724257d9 | 644 | goto no_good; |
ac28b86d KS |
645 | } else { |
646 | dbg(FIELD_SYSFS " matches"); | |
647 | } | |
648 | } | |
649 | ||
650 | /* execute external program */ | |
651 | if (dev->program[0] != '\0') { | |
652 | dbg("check " FIELD_PROGRAM); | |
653 | apply_format(udev, dev->program); | |
654 | if (execute_program(dev->program, udev->program_result, NAME_SIZE) != 0) { | |
655 | dbg(FIELD_PROGRAM " returned nozero"); | |
724257d9 | 656 | goto no_good; |
ac28b86d KS |
657 | } else { |
658 | dbg(FIELD_PROGRAM " returned successful"); | |
659 | } | |
660 | } | |
661 | ||
662 | /* check for matching result of external program */ | |
663 | if (dev->result[0] != '\0') { | |
664 | dbg("check for " FIELD_RESULT | |
665 | " dev->result='%s', udev->program_result='%s'", | |
666 | dev->result, udev->program_result); | |
667 | if (strcmp_pattern(dev->result, udev->program_result) != 0) { | |
668 | dbg(FIELD_RESULT " is not matching"); | |
724257d9 | 669 | goto no_good; |
ac28b86d KS |
670 | } else { |
671 | dbg(FIELD_RESULT " matches"); | |
672 | } | |
673 | } | |
674 | ||
675 | /* check if we are instructed to ignore this device */ | |
676 | if (dev->name[0] == '\0') { | |
677 | dbg("instructed to ignore this device"); | |
678 | return -1; | |
679 | } | |
680 | ||
724257d9 GKH |
681 | /* Yeah, we matched! */ |
682 | return 0; | |
683 | ||
684 | no_good: | |
685 | sysfs_device = sysfs_get_device_parent(sysfs_device); | |
686 | if (sysfs_device == NULL) | |
687 | return -ENODEV; | |
688 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
689 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
690 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
691 | } | |
692 | ||
693 | } | |
694 | ||
695 | int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev) | |
696 | { | |
697 | struct sysfs_device *sysfs_device = NULL; | |
698 | struct config_device *dev; | |
699 | struct perm_device *perm; | |
700 | char *pos; | |
701 | ||
702 | udev->mode = 0; | |
703 | ||
704 | /* find the sysfs_device associated with this class device */ | |
705 | sysfs_device = get_sysfs_device(class_dev); | |
706 | if (sysfs_device) { | |
707 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
708 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
709 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
710 | strfieldcpy(udev->bus_id, sysfs_device->bus_id); | |
711 | wait_for_device_to_initialize(sysfs_device); | |
712 | } else { | |
713 | dbg("class_dev->name = '%s'", class_dev->name); | |
714 | } | |
715 | ||
716 | strfieldcpy(udev->kernel_name, class_dev->name); | |
717 | ||
718 | /* get kernel number */ | |
719 | pos = class_dev->name + strlen(class_dev->name); | |
720 | while (isdigit(*(pos-1))) | |
721 | pos--; | |
722 | strfieldcpy(udev->kernel_number, pos); | |
723 | dbg("kernel_number='%s'", udev->kernel_number); | |
724 | ||
725 | /* look for a matching rule to apply */ | |
726 | list_for_each_entry(dev, &config_device_list, node) { | |
727 | dbg("process rule"); | |
728 | ||
729 | if (match_rule(dev, class_dev, udev, sysfs_device) == 0) { | |
730 | /* Yup, this rule belongs to us! */ | |
731 | info("configured rule in '%s' at line %i applied, '%s' becomes '%s'", | |
732 | udev_rules_filename, dev->config_line, udev->kernel_name, dev->name); | |
733 | strfieldcpy(udev->name, dev->name); | |
734 | strfieldcpy(udev->symlink, dev->symlink); | |
735 | goto found; | |
736 | } | |
ac28b86d | 737 | } |
120d45d0 | 738 | |
ac28b86d KS |
739 | /* no rule was found so we use the kernel name */ |
740 | strfieldcpy(udev->name, class_dev->name); | |
09e52d51 | 741 | goto done; |
c2405f50 | 742 | |
09e52d51 | 743 | found: |
3d150dfb | 744 | /* substitute placeholder */ |
f3b04a2e | 745 | apply_format(udev, udev->name); |
3d150dfb | 746 | apply_format(udev, udev->symlink); |
98b88dbf | 747 | |
09e52d51 | 748 | done: |
61219c75 GKH |
749 | perm = find_perm(udev->name); |
750 | if (perm) { | |
751 | udev->mode = perm->mode; | |
752 | strfieldcpy(udev->owner, perm->owner); | |
753 | strfieldcpy(udev->group, perm->group); | |
754 | } else { | |
755 | /* no matching perms found :( */ | |
765cbd97 | 756 | udev->mode = get_default_mode(); |
74c73ef9 | 757 | strncpy(udev->owner, get_default_owner(), OWNER_SIZE); |
758 | strncpy(udev->group, get_default_group(), GROUP_SIZE); | |
615e05f8 | 759 | } |
61219c75 GKH |
760 | dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o", |
761 | udev->name, udev->owner, udev->group, udev->mode); | |
7bd22a78 | 762 | |
120d45d0 | 763 | return 0; |
185a35a4 GKH |
764 | } |
765 | ||
2232cac8 GKH |
766 | int namedev_init(void) |
767 | { | |
768 | int retval; | |
28d6536a | 769 | |
e8baccca | 770 | retval = namedev_init_rules(); |
2232cac8 GKH |
771 | if (retval) |
772 | return retval; | |
773 | ||
774 | retval = namedev_init_permissions(); | |
775 | if (retval) | |
776 | return retval; | |
777 | ||
19feb351 | 778 | dump_config_dev_list(); |
61219c75 | 779 | dump_perm_dev_list(); |
2232cac8 GKH |
780 | return retval; |
781 | } |