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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> | |
c27e6911 | 32 | #include <sys/wait.h> |
dac056aa | 33 | #include <sys/stat.h> |
bbbe503e | 34 | #include <sys/sysinfo.h> |
2232cac8 | 35 | |
c80da508 | 36 | #include "libsysfs/sysfs/libsysfs.h" |
2232cac8 GKH |
37 | #include "list.h" |
38 | #include "udev.h" | |
c81b35c0 | 39 | #include "udev_lib.h" |
2232cac8 | 40 | #include "udev_version.h" |
54988802 | 41 | #include "logging.h" |
2232cac8 | 42 | #include "namedev.h" |
2023350e | 43 | #include "klibc_fixups.h" |
0a8dd7f3 | 44 | #include "udevdb.h" |
2232cac8 | 45 | |
a27cd06c KS |
46 | static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr); |
47 | ||
19feb351 | 48 | LIST_HEAD(config_device_list); |
61219c75 | 49 | LIST_HEAD(perm_device_list); |
2232cac8 | 50 | |
e41016d3 | 51 | |
9f1da361 KS |
52 | /* compare string with pattern (supports * ? [0-9] [!A-Z]) */ |
53 | static int strcmp_pattern(const char *p, const char *s) | |
c124eafa | 54 | { |
8a08e4b1 KS |
55 | if (s[0] == '\0') { |
56 | while (p[0] == '*') | |
9f1da361 | 57 | p++; |
8a08e4b1 | 58 | return (p[0] != '\0'); |
9f1da361 | 59 | } |
8a08e4b1 | 60 | switch (p[0]) { |
9f1da361 KS |
61 | case '[': |
62 | { | |
63 | int not = 0; | |
64 | p++; | |
8a08e4b1 | 65 | if (p[0] == '!') { |
9f1da361 KS |
66 | not = 1; |
67 | p++; | |
68 | } | |
8a08e4b1 | 69 | while ((p[0] != '\0') && (p[0] != ']')) { |
9f1da361 KS |
70 | int match = 0; |
71 | if (p[1] == '-') { | |
8a08e4b1 | 72 | if ((s[0] >= p[0]) && (s[0] <= p[2])) |
9f1da361 KS |
73 | match = 1; |
74 | p += 3; | |
75 | } else { | |
8a08e4b1 | 76 | match = (p[0] == s[0]); |
9f1da361 KS |
77 | p++; |
78 | } | |
79 | if (match ^ not) { | |
8a08e4b1 | 80 | while ((p[0] != '\0') && (p[0] != ']')) |
9f1da361 | 81 | p++; |
8a08e4b1 KS |
82 | if (p[0] == ']') |
83 | return strcmp_pattern(p+1, s+1); | |
9f1da361 KS |
84 | } |
85 | } | |
86 | } | |
87 | break; | |
88 | case '*': | |
89 | if (strcmp_pattern(p, s+1)) | |
90 | return strcmp_pattern(p+1, s); | |
91 | return 0; | |
92 | case '\0': | |
8a08e4b1 | 93 | if (s[0] == '\0') { |
9f1da361 KS |
94 | return 0; |
95 | } | |
96 | break; | |
97 | default: | |
8a08e4b1 | 98 | if ((p[0] == s[0]) || (p[0] == '?')) |
9f1da361 KS |
99 | return strcmp_pattern(p+1, s+1); |
100 | break; | |
101 | } | |
102 | return 1; | |
c124eafa KS |
103 | } |
104 | ||
61219c75 GKH |
105 | static struct perm_device *find_perm(char *name) |
106 | { | |
843d1a84 | 107 | struct perm_device *perm; |
61219c75 | 108 | |
843d1a84 | 109 | list_for_each_entry(perm, &perm_device_list, node) { |
61219c75 GKH |
110 | if (strcmp_pattern(perm->name, name)) |
111 | continue; | |
112 | return perm; | |
113 | } | |
114 | return NULL; | |
115 | } | |
116 | ||
765cbd97 | 117 | static mode_t get_default_mode(void) |
185a35a4 | 118 | { |
89571022 GKH |
119 | mode_t mode = 0600; /* default to owner rw only */ |
120 | ||
267f534d | 121 | if (strlen(default_mode_str) != 0) |
89571022 | 122 | mode = strtol(default_mode_str, NULL, 8); |
267f534d | 123 | |
89571022 | 124 | return mode; |
185a35a4 GKH |
125 | } |
126 | ||
267f534d | 127 | static char *get_default_owner(void) |
74c73ef9 | 128 | { |
267f534d | 129 | if (strlen(default_owner_str) == 0) |
c472e3c8 | 130 | strfieldcpy(default_owner_str, "root"); |
267f534d | 131 | |
74c73ef9 | 132 | return default_owner_str; |
133 | } | |
134 | ||
267f534d | 135 | static char *get_default_group(void) |
74c73ef9 | 136 | { |
267f534d | 137 | if (strlen(default_group_str) == 0) |
c472e3c8 | 138 | strfieldcpy(default_group_str, "root"); |
267f534d | 139 | |
74c73ef9 | 140 | return default_group_str; |
141 | } | |
142 | ||
a27cd06c KS |
143 | /* extract possible {attr} and move str behind it */ |
144 | static char *get_format_attribute(char **str) | |
145 | { | |
146 | char *pos; | |
147 | char *attr = NULL; | |
148 | ||
149 | if (*str[0] == '{') { | |
150 | pos = strchr(*str, '}'); | |
151 | if (pos == NULL) { | |
152 | dbg("missing closing brace for format"); | |
153 | return NULL; | |
154 | } | |
155 | pos[0] = '\0'; | |
156 | attr = *str+1; | |
157 | *str = pos+1; | |
158 | dbg("attribute='%s', str='%s'", attr, *str); | |
159 | } | |
160 | return attr; | |
161 | } | |
162 | ||
163 | /* extract possible format length and move str behind it*/ | |
164 | static int get_format_len(char **str) | |
165 | { | |
166 | int num; | |
167 | char *tail; | |
168 | ||
169 | if (isdigit(*str[0])) { | |
170 | num = (int) strtoul(*str, &tail, 10); | |
aebef544 | 171 | if (num > 0) { |
a27cd06c KS |
172 | *str = tail; |
173 | dbg("format length=%i", num); | |
174 | return num; | |
175 | } else { | |
176 | dbg("format parsing error '%s'", *str); | |
177 | } | |
178 | } | |
179 | return -1; | |
180 | } | |
181 | ||
0a8dd7f3 DZ |
182 | /** Finds the lowest positive N such that <name>N isn't present in |
183 | * $(udevroot) either as a file or a symlink. | |
184 | * | |
185 | * @param name Name to check for | |
186 | * @return 0 if <name> didn't exist and N otherwise. | |
187 | */ | |
188 | static unsigned int find_free_number (struct udevice *udev, char *name) | |
189 | { | |
190 | char temp[NAME_SIZE]; | |
191 | char path[NAME_SIZE]; | |
192 | struct udevice dev; | |
193 | int result; | |
194 | ||
195 | /* have to sweep the database for each lookup */ | |
196 | result = 0; | |
197 | strncpy(temp, name, sizeof (temp)); | |
198 | while (1) { | |
199 | if (udevdb_get_dev_byname(temp, path, &dev) != 0) | |
200 | goto found; | |
201 | /* symlink might be stale if $(udevroot) isn't cleaned; check | |
202 | * on major/minor to see if it's the same device | |
203 | */ | |
204 | if (dev.major == udev->major && dev.minor == udev->minor) | |
205 | goto found; | |
206 | snprintf (temp, sizeof(temp), "%s%d", name, ++result); | |
207 | } | |
208 | ||
209 | found: | |
210 | return result; | |
211 | } | |
212 | ||
831f800d KS |
213 | static void apply_format(struct udevice *udev, char *string, size_t maxsize, |
214 | struct sysfs_class_device *class_dev, | |
215 | struct sysfs_device *sysfs_device) | |
f3b04a2e | 216 | { |
b1c5e333 | 217 | char temp[NAME_SIZE]; |
27c3403d | 218 | char temp2[NAME_SIZE]; |
b1c5e333 | 219 | char *tail; |
f3b04a2e | 220 | char *pos; |
a27cd06c | 221 | char *attr; |
63ead27c | 222 | int len; |
88f09368 | 223 | int i; |
a27cd06c | 224 | char c; |
ef672b3d | 225 | char *spos; |
558f80ba | 226 | char *rest; |
ef672b3d | 227 | int slen; |
a27cd06c | 228 | struct sysfs_attribute *tmpattr; |
0a8dd7f3 | 229 | unsigned int next_free_number; |
f3b04a2e | 230 | |
8ffb636f | 231 | pos = string; |
f3b04a2e | 232 | while (1) { |
a36a3c3a KS |
233 | pos = strchr(pos, '%'); |
234 | if (pos == NULL) | |
a27cd06c | 235 | break; |
b1c5e333 | 236 | |
a36a3c3a KS |
237 | pos[0] = '\0'; |
238 | tail = pos+1; | |
239 | len = get_format_len(&tail); | |
240 | c = tail[0]; | |
241 | strfieldcpy(temp, tail+1); | |
242 | tail = temp; | |
243 | dbg("format=%c, string='%s', tail='%s'",c , string, tail); | |
a27cd06c KS |
244 | attr = get_format_attribute(&tail); |
245 | ||
a36a3c3a | 246 | |
a27cd06c KS |
247 | switch (c) { |
248 | case 'b': | |
249 | if (strlen(udev->bus_id) == 0) | |
f3b04a2e | 250 | break; |
17794d77 | 251 | strfieldcatmax(string, udev->bus_id, maxsize); |
a27cd06c KS |
252 | dbg("substitute bus_id '%s'", udev->bus_id); |
253 | break; | |
254 | case 'k': | |
255 | if (strlen(udev->kernel_name) == 0) | |
3e540368 | 256 | break; |
17794d77 | 257 | strfieldcatmax(string, udev->kernel_name, maxsize); |
a27cd06c KS |
258 | dbg("substitute kernel name '%s'", udev->kernel_name); |
259 | break; | |
260 | case 'n': | |
261 | if (strlen(udev->kernel_number) == 0) | |
f3b04a2e | 262 | break; |
17794d77 | 263 | strfieldcatmax(string, udev->kernel_number, maxsize); |
a27cd06c | 264 | dbg("substitute kernel number '%s'", udev->kernel_number); |
f3b04a2e | 265 | break; |
a27cd06c | 266 | case 'm': |
17794d77 | 267 | strintcatmax(string, udev->minor, maxsize); |
a27cd06c KS |
268 | dbg("substitute minor number '%u'", udev->minor); |
269 | break; | |
c58e36c0 | 270 | case 'M': |
17794d77 | 271 | strintcatmax(string, udev->major, maxsize); |
a27cd06c KS |
272 | dbg("substitute major number '%u'", udev->major); |
273 | break; | |
274 | case 'c': | |
275 | if (strlen(udev->program_result) == 0) | |
f3b04a2e | 276 | break; |
88f09368 | 277 | /* get part part of the result string */ |
63ead27c | 278 | i = 0; |
88f09368 | 279 | if (attr != NULL) |
558f80ba | 280 | i = strtoul(attr, &rest, 10); |
88f09368 | 281 | if (i > 0) { |
9fe3f9a9 | 282 | foreach_strpart(udev->program_result, " \n\r", spos, slen) { |
88f09368 | 283 | i--; |
9fe3f9a9 | 284 | if (i == 0) |
a27cd06c | 285 | break; |
b1c5e333 | 286 | } |
9fe3f9a9 KS |
287 | if (i > 0) { |
288 | dbg("requested part of result string not found"); | |
289 | break; | |
a27cd06c | 290 | } |
558f80ba KS |
291 | if (rest[0] == '+') |
292 | strfieldcpy(temp2, spos); | |
293 | else | |
294 | strfieldcpymax(temp2, spos, slen+1); | |
17794d77 | 295 | strfieldcatmax(string, temp2, maxsize); |
27c3403d | 296 | dbg("substitute part of result string '%s'", temp2); |
a27cd06c | 297 | } else { |
17794d77 | 298 | strfieldcatmax(string, udev->program_result, maxsize); |
a27cd06c | 299 | dbg("substitute result string '%s'", udev->program_result); |
f3b04a2e | 300 | } |
f3b04a2e | 301 | break; |
a27cd06c KS |
302 | case 's': |
303 | if (attr != NULL) { | |
304 | tmpattr = find_sysfs_attribute(class_dev, sysfs_device, attr); | |
305 | if (tmpattr == NULL) { | |
306 | dbg("sysfa attribute '%s' not found", attr); | |
307 | break; | |
308 | } | |
1fa26490 | 309 | /* strip trailing whitespace of matching value */ |
310 | if (isspace(tmpattr->value[strlen(tmpattr->value)-1])) { | |
311 | i = len = strlen(tmpattr->value); | |
312 | while (i > 0 && isspace(tmpattr->value[i-1])) | |
313 | i--; | |
314 | if (i < len) { | |
315 | tmpattr->value[i] = '\0'; | |
316 | dbg("remove %i trailing whitespace chars from '%s'", | |
317 | len - i, tmpattr->value); | |
318 | } | |
319 | } | |
17794d77 | 320 | strfieldcatmax(string, tmpattr->value, maxsize); |
a27cd06c KS |
321 | dbg("substitute sysfs value '%s'", tmpattr->value); |
322 | } else { | |
323 | dbg("missing attribute"); | |
324 | } | |
325 | break; | |
326 | case '%': | |
17794d77 | 327 | strfieldcatmax(string, "%", maxsize); |
a36a3c3a | 328 | pos++; |
a27cd06c | 329 | break; |
0a8dd7f3 DZ |
330 | case 'e': |
331 | next_free_number = find_free_number(udev, string); | |
332 | if (next_free_number > 0) { | |
333 | snprintf(temp2, sizeof(temp2), "%d", next_free_number); | |
334 | strfieldcatmax(string, temp2, maxsize); | |
335 | } | |
336 | break; | |
a27cd06c KS |
337 | default: |
338 | dbg("unknown substitution type '%%%c'", c); | |
339 | break; | |
340 | } | |
63ead27c KS |
341 | /* truncate to specified length */ |
342 | if (len > 0) | |
343 | pos[len] = '\0'; | |
344 | ||
17794d77 | 345 | strfieldcatmax(string, tail, maxsize); |
f3b04a2e GKH |
346 | } |
347 | } | |
348 | ||
bb051f66 GKH |
349 | /* |
350 | * Note, we can have multiple files for different busses in here due | |
351 | * to the mess that USB has for its device tree... | |
352 | */ | |
dac056aa GKH |
353 | static struct bus_file { |
354 | char *bus; | |
355 | char *file; | |
356 | } bus_files[] = { | |
357 | { .bus = "scsi", .file = "vendor" }, | |
358 | { .bus = "usb", .file = "idVendor" }, | |
bb051f66 | 359 | { .bus = "usb", .file = "iInterface" }, |
b7824727 | 360 | { .bus = "usb-serial", .file = "detach_state" }, |
2441c207 | 361 | { .bus = "ide", .file = "detach_state" }, |
48076332 | 362 | { .bus = "pci", .file = "vendor" }, |
dac056aa GKH |
363 | {} |
364 | }; | |
365 | ||
dac056aa GKH |
366 | static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device) |
367 | { | |
368 | /* sleep until we see the file for this specific bus type show up this | |
369 | * is needed because we can easily out-run the kernel in looking for | |
370 | * these files before the paticular subsystem has created them in the | |
371 | * sysfs tree properly. | |
372 | * | |
373 | * And people thought that the /sbin/hotplug event system was going to | |
374 | * be slow, poo on you for arguing that before even testing it... | |
375 | */ | |
376 | struct bus_file *b = &bus_files[0]; | |
377 | struct sysfs_attribute *tmpattr; | |
bb051f66 | 378 | int found = 0; |
7e89a569 | 379 | int loop = WAIT_FOR_FILE_SECONDS * WAIT_FOR_FILE_RETRY_FREQ; |
dac056aa GKH |
380 | |
381 | while (1) { | |
bb051f66 GKH |
382 | if (b->bus == NULL) { |
383 | if (!found) | |
384 | break; | |
7e89a569 KS |
385 | /* give the kernel a chance to create the file */ |
386 | usleep(1000 * 1000 / WAIT_FOR_FILE_RETRY_FREQ); | |
bb051f66 GKH |
387 | --loop; |
388 | if (loop == 0) | |
389 | break; | |
390 | b = &bus_files[0]; | |
391 | } | |
dac056aa | 392 | if (strcmp(sysfs_device->bus, b->bus) == 0) { |
bb051f66 GKH |
393 | found = 1; |
394 | dbg("looking for file '%s' on bus '%s'", b->file, b->bus); | |
395 | tmpattr = sysfs_get_device_attr(sysfs_device, b->file); | |
396 | if (tmpattr) { | |
397 | /* found it! */ | |
398 | goto exit; | |
dac056aa | 399 | } |
bb051f66 | 400 | dbg("can't find '%s' file", b->file); |
dac056aa | 401 | } |
bb051f66 | 402 | ++b; |
dac056aa | 403 | } |
bb051f66 GKH |
404 | if (!found) |
405 | dbg("did not find bus type '%s' on list of bus_id_files, " | |
7e89a569 KS |
406 | "please report to <linux-hotplug-devel@lists.sourceforge.net>", |
407 | sysfs_device->bus); | |
dac056aa GKH |
408 | exit: |
409 | return; /* here to prevent compiler warning... */ | |
410 | } | |
19dc5d4c | 411 | |
1b941027 GKH |
412 | static void fix_kernel_name(struct udevice *udev) |
413 | { | |
414 | char *temp = udev->kernel_name; | |
415 | ||
416 | while (*temp != 0x00) { | |
417 | /* Some block devices have a ! in their name, | |
418 | * we need to change that to / */ | |
419 | if (*temp == '!') | |
420 | *temp = '/'; | |
421 | ++temp; | |
422 | } | |
423 | } | |
424 | ||
f608f8ac | 425 | static int execute_program(const char *path, char *value, int len) |
c27e6911 PM |
426 | { |
427 | int retval; | |
35b38379 | 428 | int count; |
c27e6911 PM |
429 | int status; |
430 | int fds[2]; | |
431 | pid_t pid; | |
20524642 | 432 | char *pos; |
35b38379 | 433 | char arg[PROGRAM_SIZE]; |
f608f8ac | 434 | char *argv[(PROGRAM_SIZE / 2) + 1]; |
bc434511 | 435 | int i; |
c27e6911 | 436 | |
f608f8ac | 437 | strfieldcpy(arg, path); |
35b38379 KS |
438 | i = 0; |
439 | if (strchr(path, ' ')) { | |
35b38379 KS |
440 | pos = arg; |
441 | while (pos != NULL) { | |
442 | if (pos[0] == '\'') { | |
443 | /* don't separate if in apostrophes */ | |
444 | pos++; | |
445 | argv[i] = strsep(&pos, "\'"); | |
a75e2c14 | 446 | while (pos && pos[0] == ' ') |
35b38379 | 447 | pos++; |
a75e2c14 | 448 | } else { |
35b38379 KS |
449 | argv[i] = strsep(&pos, " "); |
450 | } | |
451 | dbg("arg[%i] '%s'", i, argv[i]); | |
452 | i++; | |
453 | } | |
f608f8ac KS |
454 | argv[i] = NULL; |
455 | dbg("execute '%s' with parsed arguments", arg); | |
456 | } else { | |
457 | argv[0] = arg; | |
458 | argv[1] = main_argv[1]; | |
459 | argv[2] = NULL; | |
460 | dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]); | |
35b38379 | 461 | } |
f608f8ac | 462 | |
c27e6911 PM |
463 | retval = pipe(fds); |
464 | if (retval != 0) { | |
465 | dbg("pipe failed"); | |
466 | return -1; | |
467 | } | |
35b38379 | 468 | |
c27e6911 | 469 | pid = fork(); |
2a25816f KS |
470 | switch(pid) { |
471 | case 0: | |
8f43a65e | 472 | /* child */ |
6e3e3c34 HH |
473 | /* dup2 write side of pipe to STDOUT */ |
474 | dup2(fds[1], STDOUT_FILENO); | |
f608f8ac | 475 | retval = execv(arg, argv); |
35b38379 | 476 | |
dde05ccb | 477 | info(FIELD_PROGRAM " execution of '%s' failed", path); |
2a25816f KS |
478 | exit(1); |
479 | case -1: | |
480 | dbg("fork failed"); | |
481 | return -1; | |
482 | default: | |
8f43a65e | 483 | /* parent reads from fds[0] */ |
c27e6911 PM |
484 | close(fds[1]); |
485 | retval = 0; | |
35b38379 | 486 | i = 0; |
c27e6911 | 487 | while (1) { |
35b38379 KS |
488 | count = read(fds[0], value + i, len - i-1); |
489 | if (count <= 0) | |
c27e6911 | 490 | break; |
35b38379 KS |
491 | |
492 | i += count; | |
493 | if (i >= len-1) { | |
ac28b86d | 494 | dbg("result len %d too short", len); |
c27e6911 | 495 | retval = -1; |
35b38379 | 496 | break; |
c27e6911 PM |
497 | } |
498 | } | |
35b38379 KS |
499 | |
500 | if (count < 0) { | |
501 | dbg("read failed with '%s'", strerror(errno)); | |
c27e6911 PM |
502 | retval = -1; |
503 | } | |
504 | ||
bbbe503e | 505 | if (i > 0 && value[i-1] == '\n') |
35b38379 KS |
506 | i--; |
507 | value[i] = '\0'; | |
508 | dbg("result is '%s'", value); | |
509 | ||
510 | close(fds[0]); | |
511 | wait(&status); | |
512 | ||
c27e6911 | 513 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { |
ac28b86d | 514 | dbg("exec program status 0x%x", status); |
c27e6911 PM |
515 | retval = -1; |
516 | } | |
517 | } | |
518 | return retval; | |
519 | } | |
520 | ||
a27cd06c | 521 | static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr) |
ca1cc0fe GKH |
522 | { |
523 | struct sysfs_attribute *tmpattr = NULL; | |
a8b01705 GKH |
524 | char *c; |
525 | ||
a27cd06c | 526 | dbg("look for device attribute '%s'", attr); |
a8b01705 | 527 | /* try to find the attribute in the class device directory */ |
a27cd06c | 528 | tmpattr = sysfs_get_classdev_attr(class_dev, attr); |
a8b01705 | 529 | if (tmpattr) |
a27cd06c | 530 | goto attr_found; |
a8b01705 GKH |
531 | |
532 | /* look in the class device directory if present */ | |
533 | if (sysfs_device) { | |
a27cd06c | 534 | tmpattr = sysfs_get_device_attr(sysfs_device, attr); |
a8b01705 | 535 | if (tmpattr) |
a27cd06c | 536 | goto attr_found; |
a8b01705 | 537 | } |
a8b01705 | 538 | |
a27cd06c KS |
539 | return NULL; |
540 | ||
541 | attr_found: | |
542 | c = strchr(tmpattr->value, '\n'); | |
543 | if (c != NULL) | |
544 | c[0] = '\0'; | |
545 | ||
546 | dbg("found attribute '%s'", tmpattr->path); | |
547 | return tmpattr; | |
548 | } | |
549 | ||
550 | static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair) | |
551 | { | |
552 | struct sysfs_attribute *tmpattr; | |
d5f91372 KS |
553 | int i; |
554 | int len; | |
a27cd06c KS |
555 | |
556 | if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0')) | |
557 | return -ENODEV; | |
558 | ||
559 | tmpattr = find_sysfs_attribute(class_dev, sysfs_device, pair->file); | |
560 | if (tmpattr == NULL) | |
561 | return -ENODEV; | |
562 | ||
d5f91372 KS |
563 | /* strip trailing whitespace of value, if not asked to match for it */ |
564 | if (! isspace(pair->value[strlen(pair->value)-1])) { | |
565 | i = len = strlen(tmpattr->value); | |
566 | while (i > 0 && isspace(tmpattr->value[i-1])) | |
567 | i--; | |
568 | if (i < len) { | |
569 | tmpattr->value[i] = '\0'; | |
570 | dbg("remove %i trailing whitespace chars from '%s'", | |
571 | len - i, tmpattr->value); | |
572 | } | |
573 | } | |
574 | ||
a8b01705 GKH |
575 | dbg("compare attribute '%s' value '%s' with '%s'", |
576 | pair->file, tmpattr->value, pair->value); | |
577 | if (strcmp_pattern(pair->value, tmpattr->value) != 0) | |
578 | return -ENODEV; | |
579 | ||
580 | dbg("found matching attribute '%s' with value '%s'", | |
581 | pair->file, pair->value); | |
582 | return 0; | |
583 | } | |
584 | ||
ac28b86d | 585 | static int match_sysfs_pairs(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
a8b01705 GKH |
586 | { |
587 | struct sysfs_pair *pair; | |
a8b01705 | 588 | int i; |
137af0cc | 589 | |
ac28b86d KS |
590 | for (i = 0; i < MAX_SYSFS_PAIRS; ++i) { |
591 | pair = &dev->sysfs_pair[i]; | |
592 | if ((pair->file[0] == '\0') || (pair->value[0] == '\0')) | |
593 | break; | |
594 | if (compare_sysfs_attribute(class_dev, sysfs_device, pair) != 0) { | |
595 | dbg("sysfs attribute doesn't match"); | |
596 | return -ENODEV; | |
ca1cc0fe | 597 | } |
ca1cc0fe | 598 | } |
ac28b86d KS |
599 | |
600 | return 0; | |
ca1cc0fe GKH |
601 | } |
602 | ||
ac28b86d | 603 | static int match_id(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
ca1cc0fe | 604 | { |
ca1cc0fe | 605 | char path[SYSFS_PATH_MAX]; |
ca1cc0fe GKH |
606 | char *temp = NULL; |
607 | ||
1f7148c7 | 608 | /* we have to have a sysfs device for ID to work */ |
ca1cc0fe GKH |
609 | if (!sysfs_device) |
610 | return -ENODEV; | |
611 | ||
ac28b86d KS |
612 | strfieldcpy(path, sysfs_device->path); |
613 | temp = strrchr(path, '/'); | |
3a8c51a7 | 614 | temp++; |
ac28b86d | 615 | dbg("search '%s' in '%s', path='%s'", dev->id, temp, path); |
3a8c51a7 | 616 | if (strcmp_pattern(dev->id, temp) != 0) |
ac28b86d | 617 | return -ENODEV; |
5a42932b PM |
618 | else |
619 | return 0; | |
ca1cc0fe GKH |
620 | } |
621 | ||
ac28b86d | 622 | static int match_place(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) |
8c51bbfe | 623 | { |
8c51bbfe GKH |
624 | char path[SYSFS_PATH_MAX]; |
625 | int found; | |
626 | char *temp = NULL; | |
627 | ||
1f7148c7 | 628 | /* we have to have a sysfs device for PLACE to work */ |
8c51bbfe GKH |
629 | if (!sysfs_device) |
630 | return -ENODEV; | |
631 | ||
ac28b86d KS |
632 | found = 0; |
633 | strfieldcpy(path, sysfs_device->path); | |
634 | temp = strrchr(path, '/'); | |
635 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); | |
636 | if (strstr(temp, dev->place) != NULL) { | |
637 | found = 1; | |
638 | } else { | |
639 | *temp = 0x00; | |
8c51bbfe | 640 | temp = strrchr(path, '/'); |
19feb351 | 641 | dbg("search '%s' in '%s', path='%s'", dev->place, temp, path); |
ac28b86d | 642 | if (strstr(temp, dev->place) != NULL) |
8c51bbfe | 643 | found = 1; |
8c51bbfe | 644 | } |
ac28b86d KS |
645 | if (!found) { |
646 | dbg("place doesn't match"); | |
647 | return -ENODEV; | |
120d45d0 | 648 | } |
120d45d0 | 649 | |
ac28b86d | 650 | return 0; |
09e52d51 KS |
651 | } |
652 | ||
9a52390c | 653 | static int whitelist_search(struct sysfs_class_device *class_dev) |
654 | { | |
fcf3ce34 | 655 | char *sysblock = "/sys/block"; |
9a52390c | 656 | int i; |
9a52390c | 657 | |
658 | static char *list[] = { | |
659 | "nb", | |
660 | "ram", | |
661 | "loop", | |
662 | "fd", | |
663 | "md", | |
664 | "dos_cd", | |
665 | "double", | |
666 | "flash", | |
667 | "msd", | |
668 | "rflash", | |
669 | "rom", | |
670 | "rrom", | |
671 | "sbpcd", | |
672 | "pcd", | |
673 | "pf", | |
674 | "scd", | |
675 | "ubd", | |
fcf3ce34 | 676 | NULL, |
9a52390c | 677 | }; |
678 | ||
fcf3ce34 GKH |
679 | if (strncmp(class_dev->path, sysblock, strlen(sysblock))) |
680 | return 0; | |
681 | ||
682 | for (i=0; list[i] != NULL; i++) | |
683 | if (!strncmp(class_dev->name, list[i], strlen(list[i]))) | |
684 | return 1; | |
9a52390c | 685 | |
686 | return 0; | |
687 | } | |
688 | ||
dac056aa | 689 | static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev) |
185a35a4 | 690 | { |
dac056aa GKH |
691 | struct sysfs_device *sysfs_device; |
692 | struct sysfs_class_device *class_dev_parent; | |
693 | int loop; | |
07562d6e GKH |
694 | |
695 | /* Figure out where the device symlink is at. For char devices this will | |
696 | * always be in the class_dev->path. But for block devices, it's different. | |
697 | * The main block device will have the device symlink in it's path, but | |
698 | * all partitions have the symlink in its parent directory. | |
699 | * But we need to watch out for block devices that do not have parents, yet | |
700 | * look like a partition (fd0, loop0, etc.) They all do not have a device | |
9a52390c | 701 | * symlink yet. We do sit and spin on waiting for them right now unless |
702 | * they happen to be in the whitelist in which case we exit. | |
dac056aa | 703 | */ |
616a7078 | 704 | class_dev_parent = sysfs_get_classdev_parent(class_dev); |
949e32f2 KS |
705 | if (class_dev_parent != NULL) |
706 | dbg("given class device has a parent, use this instead"); | |
1edbb8d3 | 707 | |
7e89a569 | 708 | loop = WAIT_FOR_FILE_SECONDS * WAIT_FOR_FILE_RETRY_FREQ; |
dac056aa | 709 | while (loop--) { |
9a52390c | 710 | if (udev_sleep) { |
711 | if (whitelist_search(class_dev)) { | |
712 | sysfs_device = NULL; | |
713 | goto exit; | |
714 | } | |
7e89a569 | 715 | usleep(1000 * 1000 / WAIT_FOR_FILE_RETRY_FREQ); |
9a52390c | 716 | } |
949e32f2 | 717 | |
616a7078 AM |
718 | if (class_dev_parent) |
719 | sysfs_device = sysfs_get_classdev_device(class_dev_parent); | |
720 | else | |
721 | sysfs_device = sysfs_get_classdev_device(class_dev); | |
dac056aa | 722 | if (sysfs_device != NULL) |
616a7078 | 723 | goto device_found; |
7bd22a78 | 724 | } |
54988802 | 725 | dbg("timed out waiting for device symlink, continuing on anyway..."); |
949e32f2 | 726 | |
616a7078 AM |
727 | device_found: |
728 | /* We have another issue with just the wait above - the sysfs part of | |
729 | * the kernel may not be quick enough to have created the link to the | |
730 | * device under the "bus" subsystem. Due to this, the sysfs_device->bus | |
731 | * will not contain the actual bus name :( | |
616a7078 AM |
732 | */ |
733 | if (sysfs_device) { | |
616a7078 AM |
734 | if (sysfs_device->bus[0] != '\0') |
735 | goto bus_found; | |
267f534d | 736 | |
616a7078 | 737 | while (loop--) { |
961e4784 | 738 | if (udev_sleep) |
7e89a569 | 739 | usleep(1000 * 1000 / WAIT_FOR_FILE_RETRY_FREQ); |
616a7078 AM |
740 | sysfs_get_device_bus(sysfs_device); |
741 | ||
742 | if (sysfs_device->bus[0] != '\0') | |
743 | goto bus_found; | |
744 | } | |
54988802 | 745 | dbg("timed out waiting to find the device bus, continuing on anyway"); |
616a7078 AM |
746 | goto exit; |
747 | bus_found: | |
54988802 | 748 | dbg("device %s is registered with bus '%s'", |
616a7078 AM |
749 | sysfs_device->name, sysfs_device->bus); |
750 | } | |
dac056aa GKH |
751 | exit: |
752 | return sysfs_device; | |
753 | } | |
754 | ||
724257d9 | 755 | static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device) |
dac056aa | 756 | { |
724257d9 | 757 | while (1) { |
ac28b86d KS |
758 | /* check for matching bus value */ |
759 | if (dev->bus[0] != '\0') { | |
760 | if (sysfs_device == NULL) { | |
761 | dbg("device has no bus"); | |
c5118442 | 762 | goto try_parent; |
ac28b86d KS |
763 | } |
764 | dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus); | |
765 | if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { | |
766 | dbg(FIELD_BUS " is not matching"); | |
c5118442 | 767 | goto try_parent; |
ac28b86d KS |
768 | } else { |
769 | dbg(FIELD_BUS " matches"); | |
770 | } | |
771 | } | |
120d45d0 | 772 | |
ac28b86d KS |
773 | /* check for matching kernel name*/ |
774 | if (dev->kernel[0] != '\0') { | |
775 | dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", dev->kernel, class_dev->name); | |
776 | if (strcmp_pattern(dev->kernel, class_dev->name) != 0) { | |
777 | dbg(FIELD_KERNEL " is not matching"); | |
c5118442 | 778 | goto try_parent; |
ac28b86d KS |
779 | } else { |
780 | dbg(FIELD_KERNEL " matches"); | |
781 | } | |
782 | } | |
ca1cc0fe | 783 | |
ac28b86d KS |
784 | /* check for matching bus id */ |
785 | if (dev->id[0] != '\0') { | |
786 | dbg("check " FIELD_ID); | |
787 | if (match_id(dev, class_dev, sysfs_device) != 0) { | |
788 | dbg(FIELD_ID " is not matching"); | |
c5118442 | 789 | goto try_parent; |
ac28b86d KS |
790 | } else { |
791 | dbg(FIELD_ID " matches"); | |
792 | } | |
793 | } | |
ca1cc0fe | 794 | |
ac28b86d KS |
795 | /* check for matching place of device */ |
796 | if (dev->place[0] != '\0') { | |
797 | dbg("check " FIELD_PLACE); | |
798 | if (match_place(dev, class_dev, sysfs_device) != 0) { | |
799 | dbg(FIELD_PLACE " is not matching"); | |
c5118442 | 800 | goto try_parent; |
ac28b86d KS |
801 | } else { |
802 | dbg(FIELD_PLACE " matches"); | |
803 | } | |
804 | } | |
8c51bbfe | 805 | |
ac28b86d KS |
806 | /* check for matching sysfs pairs */ |
807 | if (dev->sysfs_pair[0].file[0] != '\0') { | |
808 | dbg("check " FIELD_SYSFS " pairs"); | |
809 | if (match_sysfs_pairs(dev, class_dev, sysfs_device) != 0) { | |
810 | dbg(FIELD_SYSFS " is not matching"); | |
c5118442 | 811 | goto try_parent; |
ac28b86d KS |
812 | } else { |
813 | dbg(FIELD_SYSFS " matches"); | |
814 | } | |
815 | } | |
816 | ||
817 | /* execute external program */ | |
818 | if (dev->program[0] != '\0') { | |
29a3cead KS |
819 | char program[PROGRAM_SIZE]; |
820 | ||
ac28b86d | 821 | dbg("check " FIELD_PROGRAM); |
29a3cead KS |
822 | strfieldcpy(program, dev->program); |
823 | apply_format(udev, program, sizeof(program), class_dev, sysfs_device); | |
824 | if (execute_program(program, udev->program_result, NAME_SIZE) != 0) { | |
35b38379 | 825 | dbg(FIELD_PROGRAM " returned nonzero"); |
c5118442 | 826 | goto try_parent; |
ac28b86d KS |
827 | } else { |
828 | dbg(FIELD_PROGRAM " returned successful"); | |
829 | } | |
830 | } | |
831 | ||
832 | /* check for matching result of external program */ | |
833 | if (dev->result[0] != '\0') { | |
834 | dbg("check for " FIELD_RESULT | |
835 | " dev->result='%s', udev->program_result='%s'", | |
836 | dev->result, udev->program_result); | |
837 | if (strcmp_pattern(dev->result, udev->program_result) != 0) { | |
838 | dbg(FIELD_RESULT " is not matching"); | |
c5118442 | 839 | goto try_parent; |
ac28b86d KS |
840 | } else { |
841 | dbg(FIELD_RESULT " matches"); | |
842 | } | |
843 | } | |
844 | ||
724257d9 GKH |
845 | /* Yeah, we matched! */ |
846 | return 0; | |
847 | ||
c5118442 KS |
848 | try_parent: |
849 | dbg("try parent sysfs device"); | |
724257d9 GKH |
850 | sysfs_device = sysfs_get_device_parent(sysfs_device); |
851 | if (sysfs_device == NULL) | |
852 | return -ENODEV; | |
853 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
854 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
855 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
856 | } | |
857 | ||
858 | } | |
859 | ||
860 | int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev) | |
861 | { | |
862 | struct sysfs_device *sysfs_device = NULL; | |
863 | struct config_device *dev; | |
864 | struct perm_device *perm; | |
bbbe503e | 865 | struct sysinfo info; |
724257d9 GKH |
866 | char *pos; |
867 | ||
868 | udev->mode = 0; | |
869 | ||
870 | /* find the sysfs_device associated with this class device */ | |
871 | sysfs_device = get_sysfs_device(class_dev); | |
872 | if (sysfs_device) { | |
873 | dbg("sysfs_device->path='%s'", sysfs_device->path); | |
874 | dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); | |
875 | dbg("sysfs_device->bus='%s'", sysfs_device->bus); | |
876 | strfieldcpy(udev->bus_id, sysfs_device->bus_id); | |
877 | wait_for_device_to_initialize(sysfs_device); | |
724257d9 | 878 | } |
1b941027 | 879 | dbg("class_dev->name = '%s'", class_dev->name); |
724257d9 GKH |
880 | |
881 | strfieldcpy(udev->kernel_name, class_dev->name); | |
1b941027 GKH |
882 | fix_kernel_name(udev); |
883 | dbg("udev->kernel_name = '%s'", udev->kernel_name); | |
724257d9 GKH |
884 | |
885 | /* get kernel number */ | |
886 | pos = class_dev->name + strlen(class_dev->name); | |
887 | while (isdigit(*(pos-1))) | |
888 | pos--; | |
889 | strfieldcpy(udev->kernel_number, pos); | |
890 | dbg("kernel_number='%s'", udev->kernel_number); | |
891 | ||
892 | /* look for a matching rule to apply */ | |
893 | list_for_each_entry(dev, &config_device_list, node) { | |
894 | dbg("process rule"); | |
724257d9 | 895 | if (match_rule(dev, class_dev, udev, sysfs_device) == 0) { |
97ed02ee | 896 | if (dev->name[0] == '\0' && dev->symlink[0] == '\0') { |
c5118442 | 897 | info("configured rule in '%s' at line %i applied, '%s' is ignored", |
bd5f8e7c | 898 | dev->config_file, dev->config_line, udev->kernel_name); |
c5118442 KS |
899 | return -1; |
900 | } | |
901 | ||
97ed02ee | 902 | if (dev->symlink[0] != '\0') { |
615ba3e8 | 903 | char temp[NAME_SIZE]; |
ddd5b5dc | 904 | |
97ed02ee | 905 | info("configured rule in '%s' at line %i applied, added symlink '%s'", |
bd5f8e7c | 906 | dev->config_file, dev->config_line, dev->symlink); |
ddd5b5dc KS |
907 | strfieldcpy(temp, dev->symlink); |
908 | apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device); | |
0a5417a0 KS |
909 | if (udev->symlink[0] != '\0') |
910 | strfieldcat(udev->symlink, " "); | |
ddd5b5dc | 911 | strfieldcat(udev->symlink, temp); |
97ed02ee | 912 | } |
913 | ||
914 | if (dev->name[0] != '\0') { | |
949e32f2 KS |
915 | /* apply all_partitions flag only at a main block device */ |
916 | if (dev->partitions > 0 && | |
917 | (udev->type != 'b' || udev->kernel_number[0] != '\0')) | |
918 | continue; | |
919 | ||
97ed02ee | 920 | info("configured rule in '%s' at line %i applied, '%s' becomes '%s'", |
bd5f8e7c | 921 | dev->config_file, dev->config_line, udev->kernel_name, dev->name); |
97ed02ee | 922 | strfieldcpy(udev->name, dev->name); |
923 | goto found; | |
924 | } | |
724257d9 | 925 | } |
ac28b86d | 926 | } |
ac28b86d | 927 | /* no rule was found so we use the kernel name */ |
7a4877bf | 928 | strfieldcpy(udev->name, udev->kernel_name); |
bbbe503e KS |
929 | if (udev->type == 'n') |
930 | goto done; | |
931 | else | |
932 | goto perms; | |
c2405f50 | 933 | |
09e52d51 | 934 | found: |
0a5417a0 | 935 | apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); |
1e799bab KS |
936 | strfieldcpy(udev->config_file, dev->config_file); |
937 | udev->config_line = dev->config_line; | |
f61d732a KS |
938 | |
939 | if (udev->type == 'n') | |
bbbe503e | 940 | goto done; |
f61d732a | 941 | |
50e5de03 | 942 | udev->partitions = dev->partitions; |
e41016d3 | 943 | |
e41016d3 KS |
944 | /* get permissions given in rule */ |
945 | set_empty_perms(udev, dev->mode, | |
946 | dev->owner, | |
947 | dev->group); | |
948 | ||
bbbe503e | 949 | perms: |
e41016d3 | 950 | /* get permissions given in config file or set defaults */ |
61219c75 | 951 | perm = find_perm(udev->name); |
e41016d3 KS |
952 | if (perm != NULL) { |
953 | set_empty_perms(udev, perm->mode, | |
954 | perm->owner, | |
955 | perm->group); | |
61219c75 | 956 | } else { |
e41016d3 KS |
957 | set_empty_perms(udev, get_default_mode(), |
958 | get_default_owner(), | |
959 | get_default_group()); | |
615e05f8 | 960 | } |
e41016d3 | 961 | |
61219c75 GKH |
962 | dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o", |
963 | udev->name, udev->owner, udev->group, udev->mode); | |
7bd22a78 | 964 | |
bbbe503e | 965 | done: |
b608ade8 | 966 | /* store time of action */ |
bbbe503e KS |
967 | sysinfo(&info); |
968 | udev->config_uptime = info.uptime; | |
b608ade8 | 969 | |
120d45d0 | 970 | return 0; |
185a35a4 GKH |
971 | } |
972 | ||
2232cac8 GKH |
973 | int namedev_init(void) |
974 | { | |
975 | int retval; | |
28d6536a | 976 | |
e8baccca | 977 | retval = namedev_init_rules(); |
2232cac8 GKH |
978 | if (retval) |
979 | return retval; | |
980 | ||
981 | retval = namedev_init_permissions(); | |
982 | if (retval) | |
983 | return retval; | |
984 | ||
19feb351 | 985 | dump_config_dev_list(); |
61219c75 | 986 | dump_perm_dev_list(); |
2232cac8 GKH |
987 | return retval; |
988 | } |