namedev.c

   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>
  32 #include <sys/wait.h>
  33 #include <sys/stat.h>
  34
  35 #include "list.h"
  36 #include "udev.h"
  37 #include "udev_version.h"
  38 #include "namedev.h"
  39 #include "libsysfs/libsysfs.h"
  40 #include "klibc_fixups.h"
  41
  42 LIST_HEAD(config_device_list);
  43 LIST_HEAD(perm_device_list);
  44
  45 /* compare string with pattern (supports * ? [0-9] [!A-Z]) */
  46 static int strcmp_pattern(const char *p, const char *s)
  47 {
  48         if (*s == '\0') {
  49                 while (*p == '*')
  50                         p++;
  51                 return (*p != '\0');
  52         }
  53         switch (*p) {
  54         case '[':
  55                 {
  56                         int not = 0;
  57                         p++;
  58                         if (*p == '!') {
  59                                 not = 1;
  60                                 p++;
  61                         }
  62                         while (*p && (*p != ']')) {
  63                                 int match = 0;
  64                                 if (p[1] == '-') {
  65                                         if ((*s >= *p) && (*s <= p[2]))
  66                                                 match = 1;
  67                                         p += 3;
  68                                 } else {
  69                                         match = (*p == *s);
  70                                         p++;
  71                                 }
  72                                 if (match ^ not) {
  73                                         while (*p && (*p != ']'))
  74                                                 p++;
  75                                         return strcmp_pattern(p+1, s+1);
  76                                 }
  77                         }
  78                 }
  79                 break;
  80         case '*':
  81                 if (strcmp_pattern(p, s+1))
  82                         return strcmp_pattern(p+1, s);
  83                 return 0;
  84         case '\0':
  85                 if (*s == '\0') {
  86                         return 0;
  87                 }
  88                 break;
  89         default:
  90                 if ((*p == *s) || (*p == '?'))
  91                         return strcmp_pattern(p+1, s+1);
  92                 break;
  93         }
  94         return 1;
  95 }
  96
  97 #define copy_var(a, b, var)             \
  98         if (b->var)                     \
  99                 a->var = b->var;
 100
 101 #define copy_string(a, b, var)          \
 102         if (strlen(b->var))             \
 103                 strcpy(a->var, b->var);
 104
 105 int add_perm_dev(struct perm_device *new_dev)
 106 {
 107         struct list_head *tmp;
 108         struct perm_device *tmp_dev;
 109
 110         /* update the values if we already have the device */
 111         list_for_each(tmp, &perm_device_list) {
 112                 struct perm_device *dev = list_entry(tmp, struct perm_device, node);
 113                 if (strcmp_pattern(new_dev->name, dev->name))
 114                         continue;
 115                 copy_var(dev, new_dev, mode);
 116                 copy_string(dev, new_dev, owner);
 117                 copy_string(dev, new_dev, group);
 118                 return 0;
 119         }
 120
 121         /* not found, add new structure to the perm list */
 122         tmp_dev = malloc(sizeof(*tmp_dev));
 123         if (!tmp_dev)
 124                 return -ENOMEM;
 125         memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
 126         list_add_tail(&tmp_dev->node, &perm_device_list);
 127         //dump_perm_dev(tmp_dev);
 128         return 0;
 129 }
 130
 131 static struct perm_device *find_perm(char *name)
 132 {
 133         struct list_head *tmp;
 134         struct perm_device *perm = NULL;
 135
 136         list_for_each(tmp, &perm_device_list) {
 137                 perm = list_entry(tmp, struct perm_device, node);
 138                 if (strcmp_pattern(perm->name, name))
 139                         continue;
 140                 return perm;
 141         }
 142         return NULL;
 143 }
 144
 145 static mode_t get_default_mode(struct sysfs_class_device *class_dev)
 146 {
 147         mode_t mode = 0600;     /* default to owner rw only */
 148
 149         if (strlen(default_mode_str) != 0) {
 150                 mode = strtol(default_mode_str, NULL, 8);
 151         }
 152         return mode;
 153 }
 154
 155 static void apply_format(struct udevice *udev, unsigned char *string)
 156 {
 157         char name[NAME_SIZE];
 158         char temp[NAME_SIZE];
 159         char *tail;
 160         char *pos;
 161         char *pos2;
 162         char *pos3;
 163         int num;
 164
 165         while (1) {
 166                 num = 0;
 167                 pos = strchr(string, '%');
 168
 169                 if (pos) {
 170                         *pos = '\0';
 171                         tail = pos+1;
 172                         if (isdigit(tail[0])) {
 173                                 num = (int) strtoul(&pos[1], &tail, 10);
 174                                 if (tail == NULL) {
 175                                         dbg("format parsing error '%s'", pos+1);
 176                                         break;
 177                                 }
 178                         }
 179                         strfieldcpy(name, tail+1);
 180
 181                         switch (tail[0]) {
 182                         case 'b':
 183                                 if (strlen(udev->bus_id) == 0)
 184                                         break;
 185                                 strcat(pos, udev->bus_id);
 186                                 dbg("substitute bus_id '%s'", udev->bus_id);
 187                                 break;
 188                         case 'k':
 189                                 if (strlen(udev->kernel_name) == 0)
 190                                         break;
 191                                 strcat(pos, udev->kernel_name);
 192                                 dbg("substitute kernel name '%s'", udev->kernel_name);
 193                                 break;
 194                         case 'n':
 195                                 if (strlen(udev->kernel_number) == 0)
 196                                         break;
 197                                 strcat(pos, udev->kernel_number);
 198                                 dbg("substitute kernel number '%s'", udev->kernel_number);
 199                                 break;
 200                         case 'D':
 201                                 if (strlen(udev->kernel_number) == 0) {
 202                                         strcat(pos, "disc");
 203                                         break;
 204                                 }
 205                                 strcat(pos, "part");
 206                                 strcat(pos, udev->kernel_number);
 207                                 dbg("substitute kernel number '%s'", udev->kernel_number);
 208                                 break;
 209                         case 'm':
 210                                 sprintf(pos, "%u", udev->minor);
 211                                 dbg("substitute minor number '%u'", udev->minor);
 212                                 break;
 213                         case 'M':
 214                                 sprintf(pos, "%u", udev->major);
 215                                 dbg("substitute major number '%u'", udev->major);
 216                                 break;
 217                         case 'c':
 218                                 if (strlen(udev->callout_value) == 0)
 219                                         break;
 220                                 if (num) {
 221                                         /* get part of return string */
 222                                         strncpy(temp, udev->callout_value, sizeof(temp));
 223                                         pos2 = temp;
 224                                         while (num) {
 225                                                 num--;
 226                                                 pos3 = strsep(&pos2, " ");
 227                                                 if (pos3 == NULL) {
 228                                                         dbg("requested part of callout string not found");
 229                                                         break;
 230                                                 }
 231                                         }
 232                                         strcat(pos, pos3);
 233                                         dbg("substitute partial callout output '%s'", pos3);
 234                                 } else {
 235                                         strcat(pos, udev->callout_value);
 236                                         dbg("substitute callout output '%s'", udev->callout_value);
 237                                 }
 238                                 break;
 239                         default:
 240                                 dbg("unknown substitution type '%%%c'", pos[1]);
 241                                 break;
 242                         }
 243                         strcat(string, name);
 244                 } else
 245                         break;
 246         }
 247 }
 248
 249 static struct bus_file {
 250         char *bus;
 251         char *file;
 252 } bus_files[] = {
 253         { .bus = "scsi",        .file = "vendor" },
 254         { .bus = "usb",         .file = "idVendor" },
 255         { .bus = "pci",         .file = "vendor" },
 256         {}
 257 };
 258
 259 #define SECONDS_TO_WAIT_FOR_FILE        10
 260 static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device)
 261 {
 262         /* sleep until we see the file for this specific bus type show up this
 263          * is needed because we can easily out-run the kernel in looking for
 264          * these files before the paticular subsystem has created them in the
 265          * sysfs tree properly.
 266          *
 267          * And people thought that the /sbin/hotplug event system was going to
 268          * be slow, poo on you for arguing that before even testing it...
 269          */
 270         struct bus_file *b = &bus_files[0];
 271         struct sysfs_attribute *tmpattr;
 272         int loop;
 273
 274         while (1) {
 275                 if (b->bus == NULL)
 276                         break;
 277                 if (strcmp(sysfs_device->bus, b->bus) == 0) {
 278                         tmpattr = NULL;
 279                         loop = SECONDS_TO_WAIT_FOR_FILE;
 280                         while (loop--) {
 281                                 dbg("looking for file '%s' on bus '%s'", b->file, b->bus);
 282                                 tmpattr = sysfs_get_device_attr(sysfs_device, b->file);
 283                                 if (tmpattr) {
 284                                         /* found it! */
 285                                         goto exit;
 286                                 }
 287                                 /* sleep to give the kernel a chance to create the file */
 288                                 sleep(1);
 289                         }
 290                         dbg("Timed out waiting for '%s' file, continuing on anyway...", b->file);
 291                         goto exit;
 292                 }
 293                 b++;
 294         }
 295         dbg("Did not find bus type '%s' on list of bus_id_files, contact greg@kroah.com", sysfs_device->bus);
 296 exit:
 297         return; /* here to prevent compiler warning... */
 298 }
 299
 300 static int exec_callout(struct config_device *dev, char *value, int len)
 301 {
 302         int retval;
 303         int res;
 304         int status;
 305         int fds[2];
 306         pid_t pid;
 307         int value_set = 0;
 308         char buffer[256];
 309         char *pos;
 310         char *args[CALLOUT_MAXARG];
 311         int i;
 312
 313         dbg("callout to '%s'", dev->exec_program);
 314         retval = pipe(fds);
 315         if (retval != 0) {
 316                 dbg("pipe failed");
 317                 return -1;
 318         }
 319         pid = fork();
 320         if (pid == -1) {
 321                 dbg("fork failed");
 322                 return -1;
 323         }
 324
 325         if (pid == 0) {
 326                 /* child */
 327                 close(STDOUT_FILENO);
 328                 dup(fds[1]);    /* dup write side of pipe to STDOUT */
 329                 if (strchr(dev->exec_program, ' ')) {
 330                         /* callout with arguments */
 331                         pos = dev->exec_program;
 332                         for (i=0; i < CALLOUT_MAXARG-1; i++) {
 333                                 args[i] = strsep(&pos, " ");
 334                                 if (args[i] == NULL)
 335                                         break;
 336                         }
 337                         if (args[i]) {
 338                                 dbg("too many args - %d", i);
 339                                 args[i] = NULL;
 340                         }
 341                         retval = execve(args[0], args, main_envp);
 342                 } else {
 343                         retval = execve(dev->exec_program, main_argv, main_envp);
 344                 }
 345                 if (retval != 0) {
 346                         dbg("child execve failed");
 347                         exit(1);
 348                 }
 349                 return -1; /* avoid compiler warning */
 350         } else {
 351                 /* parent reads from fds[0] */
 352                 close(fds[1]);
 353                 retval = 0;
 354                 while (1) {
 355                         res = read(fds[0], buffer, sizeof(buffer) - 1);
 356                         if (res <= 0)
 357                                 break;
 358                         buffer[res] = '\0';
 359                         if (res > len) {
 360                                 dbg("callout len %d too short", len);
 361                                 retval = -1;
 362                         }
 363                         if (value_set) {
 364                                 dbg("callout value already set");
 365                                 retval = -1;
 366                         } else {
 367                                 value_set = 1;
 368                                 strncpy(value, buffer, len);
 369                                 pos = value + strlen(value)-1;
 370                                 if (pos[0] == '\n')
 371                                 pos[0] = '\0';
 372                                 dbg("callout returned '%s'", value);
 373                         }
 374                 }
 375                 close(fds[0]);
 376                 res = wait(&status);
 377                 if (res < 0) {
 378                         dbg("wait failed result %d", res);
 379                         retval = -1;
 380                 }
 381
 382 #ifndef __KLIBC__
 383                 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 384                         dbg("callout program status 0x%x", status);
 385                         retval = -1;
 386                 }
 387 #endif
 388         }
 389         return retval;
 390 }
 391
 392 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 393 {
 394         struct config_device *dev;
 395         struct list_head *tmp;
 396
 397         list_for_each(tmp, &config_device_list) {
 398                 dev = list_entry(tmp, struct config_device, node);
 399                 if (dev->type != CALLOUT)
 400                         continue;
 401
 402                 if (sysfs_device) {
 403                         dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
 404                         if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
 405                                 continue;
 406                 }
 407
 408                 /* substitute anything that needs to be in the program name */
 409                 apply_format(udev, dev->exec_program);
 410                 if (exec_callout(dev, udev->callout_value, NAME_SIZE))
 411                         continue;
 412                 if (strcmp_pattern(dev->id, udev->callout_value) != 0)
 413                         continue;
 414                 strfieldcpy(udev->name, dev->name);
 415                 strfieldcpy(udev->symlink, dev->symlink);
 416                 dbg("callout returned matching value '%s', '%s' becomes '%s'",
 417                     dev->id, class_dev->name, udev->name);
 418                 return 0;
 419         }
 420         return -ENODEV;
 421 }
 422
 423 static int match_pair(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair)
 424 {
 425         struct sysfs_attribute *tmpattr = NULL;
 426         char *c;
 427
 428         if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0'))
 429                 return -ENODEV;
 430
 431         dbg("look for device attribute '%s'", pair->file);
 432         /* try to find the attribute in the class device directory */
 433         tmpattr = sysfs_get_classdev_attr(class_dev, pair->file);
 434         if (tmpattr)
 435                 goto label_found;
 436
 437         /* look in the class device directory if present */
 438         if (sysfs_device) {
 439                 tmpattr = sysfs_get_device_attr(sysfs_device, pair->file);
 440                 if (tmpattr)
 441                         goto label_found;
 442         }
 443
 444         return -ENODEV;
 445
 446 label_found:
 447         c = tmpattr->value + strlen(tmpattr->value)-1;
 448         if (*c == '\n')
 449                 *c = 0x00;
 450         dbg("compare attribute '%s' value '%s' with '%s'",
 451                   pair->file, tmpattr->value, pair->value);
 452         if (strcmp_pattern(pair->value, tmpattr->value) != 0)
 453                 return -ENODEV;
 454
 455         dbg("found matching attribute '%s' with value '%s'",
 456             pair->file, pair->value);
 457         return 0;
 458 }
 459
 460 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 461 {
 462         struct sysfs_pair *pair;
 463         struct config_device *dev;
 464         struct list_head *tmp;
 465         int i;
 466         int match;
 467
 468         list_for_each(tmp, &config_device_list) {
 469                 dev = list_entry(tmp, struct config_device, node);
 470                 if (dev->type != LABEL)
 471                         continue;
 472
 473                 if (sysfs_device) {
 474                         dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
 475                         if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
 476                                 continue;
 477                 }
 478
 479                 match = 1;
 480                 for (i = 0; i < MAX_SYSFS_PAIRS; ++i) {
 481                         pair = &dev->sysfs_pair[i];
 482                         if ((pair->file[0] == '\0') || (pair->value[0] == '\0'))
 483                                 break;
 484                         if (match_pair(class_dev, sysfs_device, pair) != 0) {
 485                                 match = 0;
 486                                 break;
 487                         }
 488                 }
 489                 if (match == 0)
 490                         continue;
 491
 492                 /* found match */
 493                 strfieldcpy(udev->name, dev->name);
 494                 strfieldcpy(udev->symlink, dev->symlink);
 495                 dbg("found matching attribute, '%s' becomes '%s' ",
 496                     class_dev->name, udev->name);
 497
 498                 return 0;
 499         }
 500         return -ENODEV;
 501 }
 502
 503 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 504 {
 505         struct config_device *dev;
 506         struct list_head *tmp;
 507         char path[SYSFS_PATH_MAX];
 508         int found;
 509         char *temp = NULL;
 510
 511         /* we have to have a sysfs device for NUMBER to work */
 512         if (!sysfs_device)
 513                 return -ENODEV;
 514
 515         list_for_each(tmp, &config_device_list) {
 516                 dev = list_entry(tmp, struct config_device, node);
 517                 if (dev->type != NUMBER)
 518                         continue;
 519
 520                 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
 521                 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
 522                         continue;
 523
 524                 found = 0;
 525                 strfieldcpy(path, sysfs_device->path);
 526                 temp = strrchr(path, '/');
 527                 dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
 528                 if (strstr(temp, dev->id) != NULL) {
 529                         found = 1;
 530                 } else {
 531                         *temp = 0x00;
 532                         temp = strrchr(path, '/');
 533                         dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
 534                         if (strstr(temp, dev->id) != NULL)
 535                                 found = 1;
 536                 }
 537                 if (!found)
 538                         continue;
 539                 strfieldcpy(udev->name, dev->name);
 540                 strfieldcpy(udev->symlink, dev->symlink);
 541                 dbg("found matching id '%s', '%s' becomes '%s'",
 542                     dev->id, class_dev->name, udev->name);
 543                 return 0;
 544         }
 545         return -ENODEV;
 546 }
 547
 548 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 549 {
 550         struct config_device *dev;
 551         struct list_head *tmp;
 552         char path[SYSFS_PATH_MAX];
 553         int found;
 554         char *temp = NULL;
 555
 556         /* we have to have a sysfs device for TOPOLOGY to work */
 557         if (!sysfs_device)
 558                 return -ENODEV;
 559
 560         list_for_each(tmp, &config_device_list) {
 561                 dev = list_entry(tmp, struct config_device, node);
 562                 if (dev->type != TOPOLOGY)
 563                         continue;
 564
 565                 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
 566                 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
 567                         continue;
 568
 569                 found = 0;
 570                 strfieldcpy(path, sysfs_device->path);
 571                 temp = strrchr(path, '/');
 572                 dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
 573                 if (strstr(temp, dev->place) != NULL) {
 574                         found = 1;
 575                 } else {
 576                         *temp = 0x00;
 577                         temp = strrchr(path, '/');
 578                         dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
 579                         if (strstr(temp, dev->place) != NULL)
 580                                 found = 1;
 581                 }
 582                 if (!found)
 583                         continue;
 584
 585                 strfieldcpy(udev->name, dev->name);
 586                 strfieldcpy(udev->symlink, dev->symlink);
 587                 dbg("found matching place '%s', '%s' becomes '%s'",
 588                     dev->place, class_dev->name, udev->name);
 589                 return 0;
 590         }
 591         return -ENODEV;
 592 }
 593
 594 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 595 {
 596         struct config_device *dev;
 597         struct list_head *tmp;
 598
 599         list_for_each(tmp, &config_device_list) {
 600                 dev = list_entry(tmp, struct config_device, node);
 601                 if (dev->type != REPLACE)
 602                         continue;
 603
 604                 dbg("compare name '%s' with '%s'", dev->kernel_name, class_dev->name);
 605                 if (strcmp_pattern(dev->kernel_name, class_dev->name) != 0)
 606                         continue;
 607
 608                 strfieldcpy(udev->name, dev->name);
 609                 strfieldcpy(udev->symlink, dev->symlink);
 610                 dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
 611
 612                 return 0;
 613         }
 614         return -ENODEV;
 615 }
 616
 617 static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
 618 {
 619         /* heh, this is pretty simple... */
 620         strfieldcpy(udev->name, class_dev->name);
 621 }
 622
 623 static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev)
 624 {
 625         struct sysfs_device *sysfs_device;
 626         struct sysfs_class_device *class_dev_parent;
 627         int loop;
 628         char filename[SYSFS_PATH_MAX + 6];
 629         int retval;
 630         char *temp;
 631         int partition = 0;
 632
 633         /* Figure out where the device symlink is at.  For char devices this will
 634          * always be in the class_dev->path.  But for block devices, it's different.
 635          * The main block device will have the device symlink in it's path, but
 636          * all partitions have the symlink in its parent directory.
 637          * But we need to watch out for block devices that do not have parents, yet
 638          * look like a partition (fd0, loop0, etc.)  They all do not have a device
 639          * symlink yet.  We do sit and spin on waiting for them right now, we should
 640          * possibly have a whitelist for these devices here...
 641          */
 642         strcpy(filename, class_dev->path);
 643         dbg("filename = %s", filename);
 644         if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
 645                 if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
 646                         temp = strrchr(filename, '/');
 647                         if (temp) {
 648                                 partition = 1;
 649                                 *temp = 0x00;
 650                                 char *temp2 = strrchr(filename, '/');
 651                                 dbg("temp2 = %s", temp2);
 652                                 if (temp2 && (strcmp(temp2, "/block") == 0)) {
 653                                         /* oops, we have no parent block device, so go back to original directory */
 654                                         strcpy(filename, class_dev->path);
 655                                         partition = 0;
 656                                 }
 657                         }
 658                 }
 659         }
 660         strcat(filename, "/device");
 661
 662         loop = 2;
 663         while (loop--) {
 664                 struct stat buf;
 665                 dbg("looking for '%s'", filename);
 666                 retval = stat(filename, &buf);
 667                 if (!retval)
 668                         break;
 669                 /* sleep to give the kernel a chance to create the device file */
 670                 sleep(1);
 671         }
 672
 673         loop = 1;       /* FIXME put a real value in here for when everything is fixed... */
 674         while (loop--) {
 675                 /* find the sysfs_device for this class device */
 676                 /* Wouldn't it really be nice if libsysfs could do this for us? */
 677                 sysfs_device = sysfs_get_classdev_device(class_dev);
 678                 if (sysfs_device != NULL)
 679                         goto exit;
 680
 681                 /* if it's a partition, we need to get the parent device */
 682                 if (partition) {
 683                         /* FIXME  HACK HACK HACK HACK
 684                          * for some reason partitions need this extra sleep here, in order
 685                          * to wait for the device properly.  Once the libsysfs code is
 686                          * fixed properly, this sleep should go away, and we can just loop above.
 687                          */
 688                         sleep(1);
 689                         dbg("really is a partition");
 690                         class_dev_parent = sysfs_get_classdev_parent(class_dev);
 691                         if (class_dev_parent == NULL) {
 692                                 dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
 693                         } else {
 694                                 dbg("class_dev_parent->name='%s'", class_dev_parent->name);
 695                                 sysfs_device = sysfs_get_classdev_device(class_dev_parent);
 696                                 if (sysfs_device != NULL)
 697                                         goto exit;
 698                         }
 699                 }
 700                 /* sleep to give the kernel a chance to create the link */
 701                 /* FIXME remove comment...
 702                 sleep(1); */
 703         }
 704         dbg("Timed out waiting for device symlink, continuing on anyway...");
 705 exit:
 706         return sysfs_device;
 707 }
 708
 709 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
 710 {
 711         struct sysfs_device *sysfs_device = NULL;
 712         int retval = 0;
 713         struct perm_device *perm;
 714         char *pos;
 715
 716         udev->mode = 0;
 717
 718         /* find the sysfs_device associated with this class device */
 719         sysfs_device = get_sysfs_device(class_dev);
 720         if (sysfs_device) {
 721                 dbg("sysfs_device->path='%s'", sysfs_device->path);
 722                 dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
 723                 dbg("sysfs_device->bus='%s'", sysfs_device->bus);
 724                 strfieldcpy(udev->bus_id, sysfs_device->bus_id);
 725                 wait_for_device_to_initialize(sysfs_device);
 726         } else {
 727                 dbg("class_dev->name = '%s'", class_dev->name);
 728         }
 729
 730         strfieldcpy(udev->kernel_name, class_dev->name);
 731
 732         /* get kernel number */
 733         pos = class_dev->name + strlen(class_dev->name);
 734         while (isdigit(*(pos-1)))
 735                 pos--;
 736         strfieldcpy(udev->kernel_number, pos);
 737         dbg("kernel_number='%s'", udev->kernel_number);
 738
 739         /* rules are looked at in priority order */
 740         retval = do_callout(class_dev, udev, sysfs_device);
 741         if (retval == 0)
 742                 goto found;
 743
 744         retval = do_label(class_dev, udev, sysfs_device);
 745         if (retval == 0)
 746                 goto found;
 747
 748         retval = do_number(class_dev, udev, sysfs_device);
 749         if (retval == 0)
 750                 goto found;
 751
 752         retval = do_topology(class_dev, udev, sysfs_device);
 753         if (retval == 0)
 754                 goto found;
 755
 756         retval = do_replace(class_dev, udev, sysfs_device);
 757         if (retval == 0)
 758                 goto found;
 759
 760         do_kernelname(class_dev, udev);
 761         goto done;
 762
 763 found:
 764         /* substitute placeholder */
 765         apply_format(udev, udev->name);
 766         apply_format(udev, udev->symlink);
 767
 768 done:
 769         perm = find_perm(udev->name);
 770         if (perm) {
 771                 udev->mode = perm->mode;
 772                 strfieldcpy(udev->owner, perm->owner);
 773                 strfieldcpy(udev->group, perm->group);
 774         } else {
 775                 /* no matching perms found :( */
 776                 udev->mode = get_default_mode(class_dev);
 777                 udev->owner[0] = 0x00;
 778                 udev->group[0] = 0x00;
 779         }
 780         dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
 781             udev->name, udev->owner, udev->group, udev->mode);
 782
 783         return 0;
 784 }
 785
 786 int namedev_init(void)
 787 {
 788         int retval;
 789
 790         retval = namedev_init_rules();
 791         if (retval)
 792                 return retval;
 793
 794         retval = namedev_init_permissions();
 795         if (retval)
 796                 return retval;
 797
 798         dump_config_dev_list();
 799         dump_perm_dev_list();
 800         return retval;
 801 }