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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> |
bbbe503e KS |
35 | #ifndef __KLIBC__ |
36 | #include <sys/sysinfo.h> | |
37 | #endif | |
2232cac8 | 38 | |
c80da508 | 39 | #include "libsysfs/sysfs/libsysfs.h" |
2232cac8 GKH |
40 | #include "list.h" |
41 | #include "udev.h" | |
c81b35c0 | 42 | #include "udev_lib.h" |
2232cac8 | 43 | #include "udev_version.h" |
54988802 | 44 | #include "logging.h" |
2232cac8 | 45 | #include "namedev.h" |
2023350e | 46 | #include "klibc_fixups.h" |
2232cac8 | 47 | |
a27cd06c KS |
48 | static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr); |
49 | ||
19feb351 | 50 | LIST_HEAD(config_device_list); |
61219c75 | 51 | LIST_HEAD(perm_device_list); |
2232cac8 | 52 | |
e41016d3 | 53 | |
9f1da361 KS |
54 | /* compare string with pattern (supports * ? [0-9] [!A-Z]) */ |
55 | static int strcmp_pattern(const char *p, const char *s) | |
c124eafa | 56 | { |
8a08e4b1 KS |
57 | if (s[0] == '\0') { |
58 | while (p[0] == '*') | |
9f1da361 | 59 | p++; |
8a08e4b1 | 60 | return (p[0] != '\0'); |
9f1da361 | 61 | } |
8a08e4b1 | 62 | switch (p[0]) { |
9f1da361 KS |
63 | case '[': |
64 | { | |
65 | int not = 0; | |
66 | p++; | |
8a08e4b1 | 67 | if (p[0] == '!') { |
9f1da361 KS |
68 | not = 1; |
69 | p++; | |
70 | } | |
8a08e4b1 | 71 | while ((p[0] != '\0') && (p[0] != ']')) { |
9f1da361 KS |
72 | int match = 0; |
73 | if (p[1] == '-') { | |
8a08e4b1 | 74 | if ((s[0] >= p[0]) && (s[0] <= p[2])) |
9f1da361 KS |
75 | match = 1; |
76 | p += 3; | |
77 | } else { | |
8a08e4b1 | 78 | match = (p[0] == s[0]); |
9f1da361 KS |
79 | p++; |
80 | } | |
81 | if (match ^ not) { | |
8a08e4b1 | 82 | while ((p[0] != '\0') && (p[0] != ']')) |
9f1da361 | 83 | p++; |
8a08e4b1 KS |
84 | if (p[0] == ']') |
85 | return strcmp_pattern(p+1, s+1); | |
9f1da361 KS |
86 | } |
87 | } | |
88 | } | |
89 | break; | |
90 | case '*': | |
91 | if (strcmp_pattern(p, s+1)) | |
92 | return strcmp_pattern(p+1, s); | |
93 | return 0; | |
94 | case '\0': | |
8a08e4b1 | 95 | if (s[0] == '\0') { |
9f1da361 KS |
96 | return 0; |
97 | } | |
98 | break; | |
99 | default: | |
8a08e4b1 | 100 | if ((p[0] == s[0]) || (p[0] == '?')) |
9f1da361 KS |
101 | return strcmp_pattern(p+1, s+1); |
102 | break; | |
103 | } | |
104 | return 1; | |
c124eafa KS |
105 | } |
106 | ||
61219c75 GKH |
107 | static struct perm_device *find_perm(char *name) |
108 | { | |
843d1a84 | 109 | struct perm_device *perm; |
61219c75 | 110 | |
843d1a84 | 111 | list_for_each_entry(perm, &perm_device_list, node) { |
61219c75 GKH |
112 | if (strcmp_pattern(perm->name, name)) |
113 | continue; | |
114 | return perm; | |
115 | } | |
116 | return NULL; | |
117 | } | |
118 | ||
765cbd97 | 119 | static mode_t get_default_mode(void) |
185a35a4 | 120 | { |
89571022 GKH |
121 | mode_t mode = 0600; /* default to owner rw only */ |
122 | ||
267f534d | 123 | if (strlen(default_mode_str) != 0) |
89571022 | 124 | mode = strtol(default_mode_str, NULL, 8); |
267f534d | 125 | |
89571022 | 126 | return mode; |
185a35a4 GKH |
127 | } |
128 | ||
267f534d | 129 | static char *get_default_owner(void) |
74c73ef9 | 130 | { |
267f534d | 131 | if (strlen(default_owner_str) == 0) |
c472e3c8 | 132 | strfieldcpy(default_owner_str, "root"); |
267f534d | 133 | |
74c73ef9 | 134 | return default_owner_str; |
135 | } | |
136 | ||
267f534d | 137 | static char *get_default_group(void) |
74c73ef9 | 138 | { |
267f534d | 139 | if (strlen(default_group_str) == 0) |
c472e3c8 | 140 | strfieldcpy(default_group_str, "root"); |
267f534d | 141 | |
74c73ef9 | 142 | return default_group_str; |
143 | } | |
144 | ||
a27cd06c KS |
145 | /* extract possible {attr} and move str behind it */ |
146 | static char *get_format_attribute(char **str) | |
147 | { | |
148 | char *pos; | |
149 | char *attr = NULL; | |
150 | ||
151 | if (*str[0] == '{') { | |
152 | pos = strchr(*str, '}'); | |
153 | if (pos == NULL) { | |
154 | dbg("missing closing brace for format"); | |
155 | return NULL; | |
156 | } | |
157 | pos[0] = '\0'; | |
158 | attr = *str+1; | |
159 | *str = pos+1; | |
160 | dbg("attribute='%s', str='%s'", attr, *str); | |
161 | } | |
162 | return attr; | |
163 | } | |
164 | ||
165 | /* extract possible format length and move str behind it*/ | |
166 | static int get_format_len(char **str) | |
167 | { | |
168 | int num; | |
169 | char *tail; | |
170 | ||
171 | if (isdigit(*str[0])) { | |
172 | num = (int) strtoul(*str, &tail, 10); | |
aebef544 | 173 | if (num > 0) { |
a27cd06c KS |
174 | *str = tail; |
175 | dbg("format length=%i", num); | |
176 | return num; | |
177 | } else { | |
178 | dbg("format parsing error '%s'", *str); | |
179 | } | |
180 | } | |
181 | return -1; | |
182 | } | |
183 | ||
831f800d KS |
184 | static void apply_format(struct udevice *udev, char *string, size_t maxsize, |
185 | struct sysfs_class_device *class_dev, | |
186 | struct sysfs_device *sysfs_device) | |
f3b04a2e | 187 | { |
b1c5e333 | 188 | char temp[NAME_SIZE]; |
27c3403d | 189 | char temp2[NAME_SIZE]; |
b1c5e333 | 190 | char *tail; |
f3b04a2e | 191 | char *pos; |
a27cd06c | 192 | char *attr; |
63ead27c | 193 | int len; |
88f09368 | 194 | int i; |
a27cd06c | 195 | char c; |
ef672b3d | 196 | char *spos; |
558f80ba | 197 | char *rest; |
ef672b3d | 198 | int slen; |
a27cd06c | 199 | struct sysfs_attribute *tmpattr; |
f3b04a2e | 200 | |
8ffb636f | 201 | pos = string; |
a27cd06c | 202 | |
f3b04a2e | 203 | while (1) { |
3fe07342 | 204 | pos = strchr(string, '%'); |
a27cd06c | 205 | if (pos != NULL) { |
8ffb636f | 206 | pos[0] = '\0'; |
b1c5e333 | 207 | tail = pos+1; |
63ead27c | 208 | len = get_format_len(&tail); |
a27cd06c | 209 | c = tail[0]; |
8ffb636f | 210 | strfieldcpy(temp, tail+1); |
a27cd06c KS |
211 | tail = temp; |
212 | } else { | |
213 | break; | |
214 | } | |
215 | dbg("format=%c, string='%s', tail='%s'",c , string, tail); | |
b1c5e333 | 216 | |
a27cd06c KS |
217 | attr = get_format_attribute(&tail); |
218 | ||
219 | switch (c) { | |
220 | case 'b': | |
221 | if (strlen(udev->bus_id) == 0) | |
f3b04a2e | 222 | break; |
17794d77 | 223 | strfieldcatmax(string, udev->bus_id, maxsize); |
a27cd06c KS |
224 | dbg("substitute bus_id '%s'", udev->bus_id); |
225 | break; | |
226 | case 'k': | |
227 | if (strlen(udev->kernel_name) == 0) | |
3e540368 | 228 | break; |
17794d77 | 229 | strfieldcatmax(string, udev->kernel_name, maxsize); |
a27cd06c KS |
230 | dbg("substitute kernel name '%s'", udev->kernel_name); |
231 | break; | |
232 | case 'n': | |
233 | if (strlen(udev->kernel_number) == 0) | |
f3b04a2e | 234 | break; |
17794d77 | 235 | strfieldcatmax(string, udev->kernel_number, maxsize); |
a27cd06c | 236 | dbg("substitute kernel number '%s'", udev->kernel_number); |
f3b04a2e | 237 | break; |
a27cd06c | 238 | case 'm': |
17794d77 | 239 | strintcatmax(string, udev->minor, maxsize); |
a27cd06c KS |
240 | dbg("substitute minor number '%u'", udev->minor); |
241 | break; | |
c58e36c0 | 242 | case 'M': |
17794d77 | 243 | strintcatmax(string, udev->major, maxsize); |
a27cd06c KS |
244 | dbg("substitute major number '%u'", udev->major); |
245 | break; | |
246 | case 'c': | |
247 | if (strlen(udev->program_result) == 0) | |
f3b04a2e | 248 | break; |
88f09368 | 249 | /* get part part of the result string */ |
63ead27c | 250 | i = 0; |
88f09368 | 251 | if (attr != NULL) |
558f80ba | 252 | i = strtoul(attr, &rest, 10); |
88f09368 | 253 | if (i > 0) { |
9fe3f9a9 | 254 | foreach_strpart(udev->program_result, " \n\r", spos, slen) { |
88f09368 | 255 | i--; |
9fe3f9a9 | 256 | if (i == 0) |
a27cd06c | 257 | break; |
b1c5e333 | 258 | } |
9fe3f9a9 KS |
259 | if (i > 0) { |
260 | dbg("requested part of result string not found"); | |
261 | break; | |
a27cd06c | 262 | } |
558f80ba KS |
263 | if (rest[0] == '+') |
264 | strfieldcpy(temp2, spos); | |
265 | else | |
266 | strfieldcpymax(temp2, spos, slen+1); | |
17794d77 | 267 | strfieldcatmax(string, temp2, maxsize); |
27c3403d | 268 | dbg("substitute part of result string '%s'", temp2); |
a27cd06c | 269 | } else { |
17794d77 | 270 | strfieldcatmax(string, udev->program_result, maxsize); |
a27cd06c | 271 | dbg("substitute result string '%s'", udev->program_result); |
f3b04a2e | 272 | } |
f3b04a2e | 273 | break; |
a27cd06c KS |
274 | case 's': |
275 | if (attr != NULL) { | |
276 | tmpattr = find_sysfs_attribute(class_dev, sysfs_device, attr); | |
277 | if (tmpattr == NULL) { | |
278 | dbg("sysfa attribute '%s' not found", attr); | |
279 | break; | |
280 | } | |
17794d77 | 281 | strfieldcatmax(string, tmpattr->value, maxsize); |
a27cd06c KS |
282 | dbg("substitute sysfs value '%s'", tmpattr->value); |
283 | } else { | |
284 | dbg("missing attribute"); | |
285 | } | |
286 | break; | |
287 | case '%': | |
17794d77 | 288 | strfieldcatmax(string, "%", maxsize); |
a27cd06c KS |
289 | break; |
290 | default: | |
291 | dbg("unknown substitution type '%%%c'", c); | |
292 | break; | |
293 | } | |
63ead27c KS |
294 | /* truncate to specified length */ |
295 | if (len > 0) | |
296 | pos[len] = '\0'; | |
297 | ||
17794d77 | 298 | strfieldcatmax(string, tail, maxsize); |
f3b04a2e GKH |
299 | } |
300 | } | |
301 | ||
bb051f66 GKH |
302 | /* |
303 | * Note, we can have multiple files for different busses in here due | |
304 | * to the mess that USB has for its device tree... | |
305 | */ | |
dac056aa GKH |
306 | static struct bus_file { |
307 | char *bus; | |
308 | char *file; | |
309 | } bus_files[] = { | |
310 | { .bus = "scsi", .file = "vendor" }, | |
311 | { .bus = "usb", .file = "idVendor" }, | |
bb051f66 | 312 | { .bus = "usb", .file = "iInterface" }, |
b7824727 | 313 | { .bus = "usb-serial", .file = "detach_state" }, |
2441c207 | 314 | { .bus = "ide", .file = "detach_state" }, |
48076332 | 315 | { .bus = "pci", .file = "vendor" }, |
dac056aa GKH |
316 | {} |
317 | }; | |
318 | ||
319 | #define SECONDS_TO_WAIT_FOR_FILE 10 | |
320 | static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device) | |
321 | { | |
322 | /* sleep until we see the file for this specific bus type show up this | |
323 | * is needed because we can easily out-run the kernel in looking for | |
324 | * these files before the paticular subsystem has created them in the | |
325 | * sysfs tree properly. | |
326 | * | |
327 | * And people thought that the /sbin/hotplug event system was going to | |
328 | * be slow, poo on you for arguing that before even testing it... | |
329 | */ | |
330 | struct bus_file *b = &bus_files[0]; | |
331 | struct sysfs_attribute *tmpattr; | |
bb051f66 GKH |
332 | int found = 0; |
333 | int loop = SECONDS_TO_WAIT_FOR_FILE; | |
dac056aa GKH |
334 | |
335 | while (1) { | |
bb051f66 GKH |
336 | if (b->bus == NULL) { |
337 | if (!found) | |
338 | break; | |
339 | /* sleep to give the kernel a chance to create the file */ | |
340 | sleep(1); | |
341 | --loop; | |
342 | if (loop == 0) | |
343 | break; | |
344 | b = &bus_files[0]; | |
345 | } | |
dac056aa | 346 | if (strcmp(sysfs_device->bus, b->bus) == 0) { |
bb051f66 GKH |
347 | found = 1; |
348 | dbg("looking for file '%s' on bus '%s'", b->file, b->bus); | |
349 | tmpattr = sysfs_get_device_attr(sysfs_device, b->file); | |
350 | if (tmpattr) { | |
351 | /* found it! */ | |
352 | goto exit; | |
dac056aa | 353 | } |
bb051f66 | 354 | dbg("can't find '%s' file", b->file); |
dac056aa | 355 | } |
bb051f66 | 356 | ++b; |
dac056aa | 357 | } |
bb051f66 GKH |
358 | if (!found) |
359 | dbg("did not find bus type '%s' on list of bus_id_files, " | |
360 | "contact greg@kroah.com", sysfs_device->bus); | |
dac056aa GKH |
361 | exit: |
362 | return; /* here to prevent compiler warning... */ | |
363 | } | |
19dc5d4c | 364 | |
1b941027 GKH |
365 | static void fix_kernel_name(struct udevice *udev) |
366 | { | |
367 | char *temp = udev->kernel_name; | |
368 | ||
369 | while (*temp != 0x00) { | |
370 | /* Some block devices have a ! in their name, | |
371 | * we need to change that to / */ | |
372 | if (*temp == '!') | |
373 | *temp = '/'; | |
374 | ++temp; | |
375 | } | |
376 | } | |
377 | ||
ac28b86d | 378 | static int execute_program(char *path, char *value, int len) |
c27e6911 PM |
379 | { |
380 | int retval; | |
35b38379 | 381 | int count; |
c27e6911 PM |
382 | int status; |
383 | int fds[2]; | |
384 | pid_t pid; | |
20524642 | 385 | char *pos; |
35b38379 KS |
386 | char arg[PROGRAM_SIZE]; |
387 | char *argv[sizeof(arg) / 2]; | |
bc434511 | 388 | int i; |
c27e6911 | 389 | |
35b38379 KS |
390 | i = 0; |
391 | if (strchr(path, ' ')) { | |
392 | strfieldcpy(arg, path); | |
393 | pos = arg; | |
394 | while (pos != NULL) { | |
395 | if (pos[0] == '\'') { | |
396 | /* don't separate if in apostrophes */ | |
397 | pos++; | |
398 | argv[i] = strsep(&pos, "\'"); | |
399 | while (pos[0] == ' ') | |
400 | pos++; | |
401 | } else { | |
402 | argv[i] = strsep(&pos, " "); | |
403 | } | |
404 | dbg("arg[%i] '%s'", i, argv[i]); | |
405 | i++; | |
406 | } | |
407 | } | |
408 | argv[i] = NULL; | |
409 | ||
c27e6911 PM |
410 | retval = pipe(fds); |
411 | if (retval != 0) { | |
412 | dbg("pipe failed"); | |
413 | return -1; | |
414 | } | |
35b38379 | 415 | |
c27e6911 | 416 | pid = fork(); |
2a25816f KS |
417 | switch(pid) { |
418 | case 0: | |
8f43a65e | 419 | /* child */ |
c27e6911 | 420 | close(STDOUT_FILENO); |
dde05ccb GKH |
421 | |
422 | /* dup write side of pipe to STDOUT */ | |
423 | dup(fds[1]); | |
35b38379 KS |
424 | if (argv[0] != NULL) { |
425 | dbg("execute '%s' with given arguments", argv[0]); | |
426 | retval = execv(argv[0], argv); | |
bc434511 | 427 | } else { |
35b38379 | 428 | dbg("execute '%s' with main argument", path); |
2a25816f | 429 | retval = execv(path, main_argv); |
bc434511 | 430 | } |
35b38379 | 431 | |
dde05ccb | 432 | info(FIELD_PROGRAM " execution of '%s' failed", path); |
2a25816f KS |
433 | exit(1); |
434 | case -1: | |
435 | dbg("fork failed"); | |
436 | return -1; | |
437 | default: | |
8f43a65e | 438 | /* parent reads from fds[0] */ |
c27e6911 PM |
439 | close(fds[1]); |
440 | retval = 0; | |
35b38379 | 441 | i = 0; |
c27e6911 | 442 | while (1) { |
35b38379 KS |
443 | count = read(fds[0], value + i, len - i-1); |
444 | if (count <= 0) | |
c27e6911 | 445 | break; |
35b38379 KS |
446 | |
447 | i += count; | |
448 | if (i >= len-1) { | |
ac28b86d | 449 | dbg("result len %d too short", len); |
c27e6911 | 450 | retval = -1; |
35b38379 | 451 | break; |
c27e6911 PM |
452 | } |
453 | } | |
35b38379 KS |
454 | |
455 | if (count < 0) { | |
456 | dbg("read failed with '%s'", strerror(errno)); | |
c27e6911 PM |
457 | retval = -1; |
458 | } | |
459 | ||
bbbe503e | 460 | if (i > 0 && value[i-1] == '\n') |
35b38379 KS |
461 | i--; |
462 | value[i] = '\0'; | |
463 | dbg("result is '%s'", value); | |
464 | ||
465 | close(fds[0]); | |
466 | wait(&status); | |
467 | ||
c27e6911 | 468 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { |
ac28b86d | 469 | dbg("exec program status 0x%x", status); |
c27e6911 PM |
470 | retval = -1; |
471 | } | |
472 | } | |
473 | return retval; | |
474 | } | |
475 | ||
a27cd06c | 476 | static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr) |
ca1cc0fe GKH |
477 | { |
478 | struct sysfs_attribute *tmpattr = NULL; | |
a8b01705 GKH |
479 | char *c; |
480 | ||
a27cd06c | 481 | dbg("look for device attribute '%s'", attr); |
a8b01705 | 482 | /* try to find the attribute in the class device directory */ |
a27cd06c | 483 | tmpattr = sysfs_get_classdev_attr(class_dev, attr); |
a8b01705 | 484 | if (tmpattr) |
a27cd06c | 485 | goto attr_found; |
a8b01705 GKH |
486 | |
487 | /* look in the class device directory if present */ | |
488 | if (sysfs_device) { | |
a27cd06c | 489 | tmpattr = sysfs_get_device_attr(sysfs_device, attr); |
a8b01705 | 490 | if (tmpattr) |
a27cd06c | 491 | goto attr_found; |
a8b01705 | 492 | } |
a8b01705 | 493 | |
a27cd06c KS |
494 | return NULL; |
495 | ||
496 | attr_found: | |
497 | c = strchr(tmpattr->value, '\n'); | |
498 | if (c != NULL) | |
499 | c[0] = '\0'; | |
500 | ||
501 | dbg("found attribute '%s'", tmpattr->path); | |
502 | return tmpattr; | |
503 | } | |
504 | ||
505 | static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair) | |
506 | { | |
507 | struct sysfs_attribute *tmpattr; | |
d5f91372 KS |
508 | int i; |
509 | int len; | |
a27cd06c KS |
510 | |
511 | if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0')) | |
512 | return -ENODEV; | |
513 | ||
514 | tmpattr = find_sysfs_attribute(class_dev, sysfs_device, pair->file); | |
515 | if (tmpattr == NULL) | |
516 | return -ENODEV; | |
517 | ||
d5f91372 KS |
518 | /* strip trailing whitespace of value, if not asked to match for it */ |
519 | if (! isspace(pair->value[strlen(pair->value)-1])) { | |
520 | i = len = strlen(tmpattr->value); | |
521 | while (i > 0 && isspace(tmpattr->value[i-1])) | |
522 | i--; | |
523 | if (i < len) { | |
524 | tmpattr->value[i] = '\0'; | |
525 | dbg("remove %i trailing whitespace chars from '%s'", | |
526 | len - i, tmpattr->value); | |
527 | } | |
528 | } | |
529 | ||
a8b01705 GKH |
530 | dbg("compare attribute '%s' value '%s' with '%s'", |
531 | pair->file, tmpattr->value, pair->value); | |
532 | if (strcmp_pattern(pair->value, tmpattr->value) != 0) | |
533 | return -ENODEV; | |
534 | ||
535 | dbg("found matching attribute '%s' with value '%s'", | |
536 | pair->file, pair->value); | |
537 | return 0; | |
538 | } | |
539 | ||
ac28b86d | 540 | static int match_sysfs_pairs(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
a8b01705 GKH |
541 | { |
542 | struct sysfs_pair *pair; | |
a8b01705 | 543 | int i; |
137af0cc | 544 | |
ac28b86d KS |
545 | for (i = 0; i < MAX_SYSFS_PAIRS; ++i) { |
546 | pair = &dev->sysfs_pair[i]; | |
547 | if ((pair->file[0] == '\0') || (pair->value[0] == '\0')) | |
548 | break; | |
549 | if (compare_sysfs_attribute(class_dev, sysfs_device, pair) != 0) { | |
550 | dbg("sysfs attribute doesn't match"); | |
551 | return -ENODEV; | |
ca1cc0fe | 552 | } |
ca1cc0fe | 553 | } |
ac28b86d KS |
554 | |
555 | return 0; | |
ca1cc0fe GKH |
556 | } |
557 | ||
ac28b86d | 558 | static int match_id(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
ca1cc0fe | 559 | { |
ca1cc0fe | 560 | char path[SYSFS_PATH_MAX]; |
ca1cc0fe GKH |
561 | char *temp = NULL; |
562 | ||
1f7148c7 | 563 | /* we have to have a sysfs device for ID to work */ |
ca1cc0fe GKH |
564 | if (!sysfs_device) |
565 | return -ENODEV; | |
566 | ||
ac28b86d KS |
567 | strfieldcpy(path, sysfs_device->path); |
568 | temp = strrchr(path, '/'); | |
3a8c51a7 | 569 | temp++; |
ac28b86d | 570 | dbg("search '%s' in '%s', path='%s'", dev->id, temp, path); |
3a8c51a7 | 571 | if (strcmp_pattern(dev->id, temp) != 0) |
ac28b86d | 572 | return -ENODEV; |
5a42932b PM |
573 | else |
574 | return 0; | |
ca1cc0fe GKH |
575 | } |
576 | ||
ac28b86d | 577 | static int match_place(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
8c51bbfe | 578 | { |
8c51bbfe GKH |
579 | char path[SYSFS_PATH_MAX]; |
580 | int found; | |
581 | char *temp = NULL; | |
582 | ||
1f7148c7 | 583 | /* we have to have a sysfs device for PLACE to work */ |
8c51bbfe GKH |
584 | if (!sysfs_device) |
585 | return -ENODEV; | |
586 | ||
ac28b86d KS |
587 | found = 0; |
588 | strfieldcpy(path, sysfs_device->path); | |
589 | temp = strrchr(path, '/'); | |
590 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); | |
591 | if (strstr(temp, dev->place) != NULL) { | |
592 | found = 1; | |
593 | } else { | |
594 | *temp = 0x00; | |
8c51bbfe | 595 | temp = strrchr(path, '/'); |
19feb351 | 596 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); |
ac28b86d | 597 | if (strstr(temp, dev->place) != NULL) |
8c51bbfe | 598 | found = 1; |
8c51bbfe | 599 | } |
ac28b86d KS |
600 | if (!found) { |
601 | dbg("place doesn't match"); | |
602 | return -ENODEV; | |
120d45d0 | 603 | } |
120d45d0 | 604 | |
ac28b86d | 605 | return 0; |
09e52d51 KS |
606 | } |
607 | ||
dac056aa | 608 | static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev) |
185a35a4 | 609 | { |
dac056aa GKH |
610 | struct sysfs_device *sysfs_device; |
611 | struct sysfs_class_device *class_dev_parent; | |
616a7078 | 612 | struct timespec tspec; |
dac056aa | 613 | int loop; |
07562d6e GKH |
614 | |
615 | /* Figure out where the device symlink is at. For char devices this will | |
616 | * always be in the class_dev->path. But for block devices, it's different. | |
617 | * The main block device will have the device symlink in it's path, but | |
618 | * all partitions have the symlink in its parent directory. | |
619 | * But we need to watch out for block devices that do not have parents, yet | |
620 | * look like a partition (fd0, loop0, etc.) They all do not have a device | |
621 | * symlink yet. We do sit and spin on waiting for them right now, we should | |
622 | * possibly have a whitelist for these devices here... | |
dac056aa | 623 | */ |
616a7078 | 624 | class_dev_parent = sysfs_get_classdev_parent(class_dev); |
949e32f2 KS |
625 | if (class_dev_parent != NULL) |
626 | dbg("given class device has a parent, use this instead"); | |
1edbb8d3 | 627 | |
616a7078 AM |
628 | tspec.tv_sec = 0; |
629 | tspec.tv_nsec = 10000000; /* sleep 10 millisec */ | |
630 | loop = 10; | |
dac056aa | 631 | while (loop--) { |
961e4784 GKH |
632 | if (udev_sleep) |
633 | nanosleep(&tspec, NULL); | |
949e32f2 | 634 | |
616a7078 AM |
635 | if (class_dev_parent) |
636 | sysfs_device = sysfs_get_classdev_device(class_dev_parent); | |
637 | else | |
638 | sysfs_device = sysfs_get_classdev_device(class_dev); | |
dac056aa | 639 | if (sysfs_device != NULL) |
616a7078 | 640 | goto device_found; |
7bd22a78 | 641 | } |
54988802 | 642 | dbg("timed out waiting for device symlink, continuing on anyway..."); |
949e32f2 | 643 | |
616a7078 AM |
644 | device_found: |
645 | /* We have another issue with just the wait above - the sysfs part of | |
646 | * the kernel may not be quick enough to have created the link to the | |
647 | * device under the "bus" subsystem. Due to this, the sysfs_device->bus | |
648 | * will not contain the actual bus name :( | |
616a7078 AM |
649 | */ |
650 | if (sysfs_device) { | |
616a7078 AM |
651 | if (sysfs_device->bus[0] != '\0') |
652 | goto bus_found; | |
267f534d | 653 | |
616a7078 AM |
654 | loop = 10; |
655 | tspec.tv_nsec = 10000000; | |
656 | while (loop--) { | |
961e4784 GKH |
657 | if (udev_sleep) |
658 | nanosleep(&tspec, NULL); | |
616a7078 AM |
659 | sysfs_get_device_bus(sysfs_device); |
660 | ||
661 | if (sysfs_device->bus[0] != '\0') | |
662 | goto bus_found; | |
663 | } | |
54988802 | 664 | dbg("timed out waiting to find the device bus, continuing on anyway"); |
616a7078 AM |
665 | goto exit; |
666 | bus_found: | |
54988802 | 667 | dbg("device %s is registered with bus '%s'", |
616a7078 AM |
668 | sysfs_device->name, sysfs_device->bus); |
669 | } | |
dac056aa GKH |
670 | exit: |
671 | return sysfs_device; | |
672 | } | |
673 | ||
724257d9 | 674 | static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device) |
dac056aa | 675 | { |
724257d9 | 676 | while (1) { |
ac28b86d KS |
677 | /* check for matching bus value */ |
678 | if (dev->bus[0] != '\0') { | |
679 | if (sysfs_device == NULL) { | |
680 | dbg("device has no bus"); | |
c5118442 | 681 | goto try_parent; |
ac28b86d KS |
682 | } |
683 | dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus); | |
684 | if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { | |
685 | dbg(FIELD_BUS " is not matching"); | |
c5118442 | 686 | goto try_parent; |
ac28b86d KS |
687 | } else { |
688 | dbg(FIELD_BUS " matches"); | |
689 | } | |
690 | } | |
120d45d0 | 691 | |
ac28b86d KS |
692 | /* check for matching kernel name*/ |
693 | if (dev->kernel[0] != '\0') { | |
694 | dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", dev->kernel, class_dev->name); | |
695 | if (strcmp_pattern(dev->kernel, class_dev->name) != 0) { | |
696 | dbg(FIELD_KERNEL " is not matching"); | |
c5118442 | 697 | goto try_parent; |
ac28b86d KS |
698 | } else { |
699 | dbg(FIELD_KERNEL " matches"); | |
700 | } | |
701 | } | |
ca1cc0fe | 702 | |
ac28b86d KS |
703 | /* check for matching bus id */ |
704 | if (dev->id[0] != '\0') { | |
705 | dbg("check " FIELD_ID); | |
706 | if (match_id(dev, class_dev, sysfs_device) != 0) { | |
707 | dbg(FIELD_ID " is not matching"); | |
c5118442 | 708 | goto try_parent; |
ac28b86d KS |
709 | } else { |
710 | dbg(FIELD_ID " matches"); | |
711 | } | |
712 | } | |
ca1cc0fe | 713 | |
ac28b86d KS |
714 | /* check for matching place of device */ |
715 | if (dev->place[0] != '\0') { | |
716 | dbg("check " FIELD_PLACE); | |
717 | if (match_place(dev, class_dev, sysfs_device) != 0) { | |
718 | dbg(FIELD_PLACE " is not matching"); | |
c5118442 | 719 | goto try_parent; |
ac28b86d KS |
720 | } else { |
721 | dbg(FIELD_PLACE " matches"); | |
722 | } | |
723 | } | |
8c51bbfe | 724 | |
ac28b86d KS |
725 | /* check for matching sysfs pairs */ |
726 | if (dev->sysfs_pair[0].file[0] != '\0') { | |
727 | dbg("check " FIELD_SYSFS " pairs"); | |
728 | if (match_sysfs_pairs(dev, class_dev, sysfs_device) != 0) { | |
729 | dbg(FIELD_SYSFS " is not matching"); | |
c5118442 | 730 | goto try_parent; |
ac28b86d KS |
731 | } else { |
732 | dbg(FIELD_SYSFS " matches"); | |
733 | } | |
734 | } | |
735 | ||
736 | /* execute external program */ | |
737 | if (dev->program[0] != '\0') { | |
738 | dbg("check " FIELD_PROGRAM); | |
831f800d KS |
739 | apply_format(udev, dev->program, sizeof(dev->program), |
740 | class_dev, sysfs_device); | |
ac28b86d | 741 | if (execute_program(dev->program, udev->program_result, NAME_SIZE) != 0) { |
35b38379 | 742 | dbg(FIELD_PROGRAM " returned nonzero"); |
c5118442 | 743 | goto try_parent; |
ac28b86d KS |
744 | } else { |
745 | dbg(FIELD_PROGRAM " returned successful"); | |
746 | } | |
747 | } | |
748 | ||
749 | /* check for matching result of external program */ | |
750 | if (dev->result[0] != '\0') { | |
751 | dbg("check for " FIELD_RESULT | |
752 | " dev->result='%s', udev->program_result='%s'", | |
753 | dev->result, udev->program_result); | |
754 | if (strcmp_pattern(dev->result, udev->program_result) != 0) { | |
755 | dbg(FIELD_RESULT " is not matching"); | |
c5118442 | 756 | goto try_parent; |
ac28b86d KS |
757 | } else { |
758 | dbg(FIELD_RESULT " matches"); | |
759 | } | |
760 | } | |
761 | ||
724257d9 GKH |
762 | /* Yeah, we matched! */ |
763 | return 0; | |
764 | ||
c5118442 KS |
765 | try_parent: |
766 | dbg("try parent sysfs device"); | |
724257d9 GKH |
767 | sysfs_device = sysfs_get_device_parent(sysfs_device); |
768 | if (sysfs_device == NULL) | |
769 | return -ENODEV; | |
770 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
771 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
772 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
773 | } | |
774 | ||
775 | } | |
776 | ||
777 | int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev) | |
778 | { | |
779 | struct sysfs_device *sysfs_device = NULL; | |
780 | struct config_device *dev; | |
781 | struct perm_device *perm; | |
bbbe503e | 782 | struct sysinfo info; |
724257d9 GKH |
783 | char *pos; |
784 | ||
785 | udev->mode = 0; | |
786 | ||
787 | /* find the sysfs_device associated with this class device */ | |
788 | sysfs_device = get_sysfs_device(class_dev); | |
789 | if (sysfs_device) { | |
790 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
791 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
792 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
793 | strfieldcpy(udev->bus_id, sysfs_device->bus_id); | |
794 | wait_for_device_to_initialize(sysfs_device); | |
724257d9 | 795 | } |
1b941027 | 796 | dbg("class_dev->name = '%s'", class_dev->name); |
724257d9 GKH |
797 | |
798 | strfieldcpy(udev->kernel_name, class_dev->name); | |
1b941027 GKH |
799 | fix_kernel_name(udev); |
800 | dbg("udev->kernel_name = '%s'", udev->kernel_name); | |
724257d9 GKH |
801 | |
802 | /* get kernel number */ | |
803 | pos = class_dev->name + strlen(class_dev->name); | |
804 | while (isdigit(*(pos-1))) | |
805 | pos--; | |
806 | strfieldcpy(udev->kernel_number, pos); | |
807 | dbg("kernel_number='%s'", udev->kernel_number); | |
808 | ||
809 | /* look for a matching rule to apply */ | |
810 | list_for_each_entry(dev, &config_device_list, node) { | |
811 | dbg("process rule"); | |
724257d9 | 812 | if (match_rule(dev, class_dev, udev, sysfs_device) == 0) { |
97ed02ee | 813 | if (dev->name[0] == '\0' && dev->symlink[0] == '\0') { |
c5118442 | 814 | info("configured rule in '%s' at line %i applied, '%s' is ignored", |
bd5f8e7c | 815 | dev->config_file, dev->config_line, udev->kernel_name); |
c5118442 KS |
816 | return -1; |
817 | } | |
818 | ||
97ed02ee | 819 | if (dev->symlink[0] != '\0') { |
615ba3e8 | 820 | char temp[NAME_SIZE]; |
ddd5b5dc | 821 | |
97ed02ee | 822 | info("configured rule in '%s' at line %i applied, added symlink '%s'", |
bd5f8e7c | 823 | dev->config_file, dev->config_line, dev->symlink); |
ddd5b5dc KS |
824 | strfieldcpy(temp, dev->symlink); |
825 | apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device); | |
0a5417a0 KS |
826 | if (udev->symlink[0] != '\0') |
827 | strfieldcat(udev->symlink, " "); | |
ddd5b5dc | 828 | strfieldcat(udev->symlink, temp); |
97ed02ee | 829 | } |
830 | ||
831 | if (dev->name[0] != '\0') { | |
949e32f2 KS |
832 | /* apply all_partitions flag only at a main block device */ |
833 | if (dev->partitions > 0 && | |
834 | (udev->type != 'b' || udev->kernel_number[0] != '\0')) | |
835 | continue; | |
836 | ||
97ed02ee | 837 | info("configured rule in '%s' at line %i applied, '%s' becomes '%s'", |
bd5f8e7c | 838 | dev->config_file, dev->config_line, udev->kernel_name, dev->name); |
97ed02ee | 839 | strfieldcpy(udev->name, dev->name); |
840 | goto found; | |
841 | } | |
724257d9 | 842 | } |
ac28b86d | 843 | } |
ac28b86d | 844 | /* no rule was found so we use the kernel name */ |
7a4877bf | 845 | strfieldcpy(udev->name, udev->kernel_name); |
bbbe503e KS |
846 | if (udev->type == 'n') |
847 | goto done; | |
848 | else | |
849 | goto perms; | |
c2405f50 | 850 | |
09e52d51 | 851 | found: |
0a5417a0 | 852 | apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); |
f61d732a KS |
853 | |
854 | if (udev->type == 'n') | |
bbbe503e | 855 | goto done; |
f61d732a | 856 | |
50e5de03 | 857 | udev->partitions = dev->partitions; |
b608ade8 KS |
858 | strfieldcpy(udev->config_file, dev->config_file); |
859 | udev->config_line = dev->config_line; | |
e41016d3 | 860 | |
e41016d3 KS |
861 | /* get permissions given in rule */ |
862 | set_empty_perms(udev, dev->mode, | |
863 | dev->owner, | |
864 | dev->group); | |
865 | ||
bbbe503e | 866 | perms: |
e41016d3 | 867 | /* get permissions given in config file or set defaults */ |
61219c75 | 868 | perm = find_perm(udev->name); |
e41016d3 KS |
869 | if (perm != NULL) { |
870 | set_empty_perms(udev, perm->mode, | |
871 | perm->owner, | |
872 | perm->group); | |
61219c75 | 873 | } else { |
e41016d3 KS |
874 | set_empty_perms(udev, get_default_mode(), |
875 | get_default_owner(), | |
876 | get_default_group()); | |
615e05f8 | 877 | } |
e41016d3 | 878 | |
61219c75 GKH |
879 | dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o", |
880 | udev->name, udev->owner, udev->group, udev->mode); | |
7bd22a78 | 881 | |
bbbe503e | 882 | done: |
b608ade8 | 883 | /* store time of action */ |
bbbe503e KS |
884 | sysinfo(&info); |
885 | udev->config_uptime = info.uptime; | |
b608ade8 | 886 | |
120d45d0 | 887 | return 0; |
185a35a4 GKH |
888 | } |
889 | ||
2232cac8 GKH |
890 | int namedev_init(void) |
891 | { | |
892 | int retval; | |
28d6536a | 893 | |
e8baccca | 894 | retval = namedev_init_rules(); |
2232cac8 GKH |
895 | if (retval) |
896 | return retval; | |
897 | ||
898 | retval = namedev_init_permissions(); | |
899 | if (retval) | |
900 | return retval; | |
901 | ||
19feb351 | 902 | dump_config_dev_list(); |
61219c75 | 903 | dump_perm_dev_list(); |
2232cac8 GKH |
904 | return retval; |
905 | } |