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 /* define this to enable parsing debugging */
  25 /* #define DEBUG_PARSER */
  26
  27 #include <stddef.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <fcntl.h>
  32 #include <ctype.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <sys/wait.h>
  36
  37 #include "list.h"
  38 #include "udev.h"
  39 #include "udev_version.h"
  40 #include "namedev.h"
  41 #include "libsysfs/libsysfs.h"
  42
  43 #define TYPE_LABEL      "LABEL"
  44 #define TYPE_NUMBER     "NUMBER"
  45 #define TYPE_TOPOLOGY   "TOPOLOGY"
  46 #define TYPE_REPLACE    "REPLACE"
  47 #define TYPE_CALLOUT    "CALLOUT"
  48
  49 static LIST_HEAD(config_device_list);
  50
  51 static void dump_dev(struct config_device *dev)
  52 {
  53         switch (dev->type) {
  54         case KERNEL_NAME:
  55                 dbg_parse("KERNEL name ='%s'"
  56                         " owner = '%s', group = '%s', mode = '%#o'",
  57                         dev->name,
  58                         dev->owner, dev->group, dev->mode);
  59                 break;
  60         case LABEL:
  61                 dbg_parse("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'"
  62                         " owner = '%s', group = '%s', mode = '%#o'",
  63                         dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
  64                         dev->owner, dev->group, dev->mode);
  65                 break;
  66         case NUMBER:
  67                 dbg_parse("NUMBER name = '%s', bus = '%s', id = '%s'"
  68                         " owner = '%s', group = '%s', mode = '%#o'",
  69                         dev->name, dev->bus, dev->id,
  70                         dev->owner, dev->group, dev->mode);
  71                 break;
  72         case TOPOLOGY:
  73                 dbg_parse("TOPOLOGY name = '%s', bus = '%s', place = '%s'"
  74                         " owner = '%s', group = '%s', mode = '%#o'",
  75                         dev->name, dev->bus, dev->place,
  76                         dev->owner, dev->group, dev->mode);
  77                 break;
  78         case REPLACE:
  79                 dbg_parse("REPLACE name = %s, kernel_name = %s"
  80                         " owner = '%s', group = '%s', mode = '%#o'",
  81                         dev->name, dev->kernel_name,
  82                         dev->owner, dev->group, dev->mode);
  83                 break;
  84         case CALLOUT:
  85                 dbg_parse("CALLOUT name = '%s', program ='%s', bus = '%s', id = '%s'"
  86                         " owner = '%s', group = '%s', mode = '%#o'",
  87                         dev->name, dev->exec_program, dev->bus, dev->id,
  88                         dev->owner, dev->group, dev->mode);
  89                 break;
  90         default:
  91                 dbg_parse("Unknown type of device!");
  92         }
  93 }
  94
  95 #define copy_var(a, b, var)             \
  96         if (b->var)                     \
  97                 a->var = b->var;
  98
  99 #define copy_string(a, b, var)          \
 100         if (strlen(b->var))             \
 101                 strcpy(a->var, b->var);
 102
 103 static int add_dev(struct config_device *new_dev)
 104 {
 105         struct list_head *tmp;
 106         struct config_device *tmp_dev;
 107
 108         /* loop through the whole list of devices to see if we already have
 109          * this one... */
 110         list_for_each(tmp, &config_device_list) {
 111                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 112                 if (strcmp(dev->name, new_dev->name) == 0) {
 113                         /* the same, copy the new info into this structure */
 114                         copy_var(dev, new_dev, type);
 115                         copy_var(dev, new_dev, mode);
 116                         copy_string(dev, new_dev, bus);
 117                         copy_string(dev, new_dev, sysfs_file);
 118                         copy_string(dev, new_dev, sysfs_value);
 119                         copy_string(dev, new_dev, id);
 120                         copy_string(dev, new_dev, place);
 121                         copy_string(dev, new_dev, kernel_name);
 122                         copy_string(dev, new_dev, owner);
 123                         copy_string(dev, new_dev, group);
 124                         return 0;
 125                 }
 126         }
 127
 128         /* not found, lets create a new structure, and add it to the list */
 129         tmp_dev = malloc(sizeof(*tmp_dev));
 130         if (!tmp_dev)
 131                 return -ENOMEM;
 132         memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
 133         list_add(&tmp_dev->node, &config_device_list);
 134         //dump_dev(tmp_dev);
 135         return 0;
 136 }
 137
 138 static void dump_dev_list(void)
 139 {
 140         struct list_head *tmp;
 141
 142         list_for_each(tmp, &config_device_list) {
 143                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 144                 dump_dev(dev);
 145         }
 146 }
 147
 148 static int get_pair(char **orig_string, char **left, char **right)
 149 {
 150         char *temp;
 151         char *string = *orig_string;
 152
 153         if (!string)
 154                 return -ENODEV;
 155
 156         /* eat any whitespace */
 157         while (isspace(*string))
 158                 ++string;
 159
 160         /* split based on '=' */
 161         temp = strsep(&string, "=");
 162         *left = temp;
 163         if (!string)
 164                 return -ENODEV;
 165
 166         /* take the right side and strip off the '"' */
 167         while (isspace(*string))
 168                 ++string;
 169         if (*string == '"')
 170                 ++string;
 171         else
 172                 return -ENODEV;
 173
 174         temp = strsep(&string, "\"");
 175         if (!string || *temp == '\0')
 176                 return -ENODEV;
 177         *right = temp;
 178         *orig_string = string;
 179
 180         return 0;
 181 }
 182
 183 static int get_value(const char *left, char **orig_string, char **ret_string)
 184 {
 185         int retval;
 186         char *left_string;
 187
 188         retval = get_pair(orig_string, &left_string, ret_string);
 189         if (retval)
 190                 return retval;
 191         if (strcasecmp(left_string, left) != 0)
 192                 return -ENODEV;
 193         return 0;
 194 }
 195
 196 static int namedev_init_config(void)
 197 {
 198         char line[255];
 199         int lineno;
 200         char *temp;
 201         char *temp2;
 202         char *temp3;
 203         FILE *fd;
 204         int retval = 0;
 205         struct config_device dev;
 206
 207         dbg("opening %s to read as config", udev_config_filename);
 208         fd = fopen(udev_config_filename, "r");
 209         if (fd == NULL) {
 210                 dbg("Can't open %s", udev_config_filename);
 211                 return -ENODEV;
 212         }
 213
 214         /* loop through the whole file */
 215         lineno = 0;
 216         while (1) {
 217                 /* get a line */
 218                 temp = fgets(line, sizeof(line), fd);
 219                 if (temp == NULL)
 220                         goto exit;
 221                 lineno++;
 222
 223                 dbg_parse("read %s", temp);
 224
 225                 /* eat the whitespace at the beginning of the line */
 226                 while (isspace(*temp))
 227                         ++temp;
 228
 229                 /* no more line? */
 230                 if (*temp == 0x00)
 231                         continue;
 232
 233                 /* see if this is a comment */
 234                 if (*temp == COMMENT_CHARACTER)
 235                         continue;
 236
 237                 memset(&dev, 0x00, sizeof(struct config_device));
 238
 239                 /* parse the line */
 240                 temp2 = strsep(&temp, ",");
 241                 if (strcasecmp(temp2, TYPE_LABEL) == 0) {
 242                         /* label type */
 243                         dev.type = LABEL;
 244
 245                         /* BUS="bus" */
 246                         retval = get_value("BUS", &temp, &temp3);
 247                         if (retval)
 248                                 break;
 249                         strfieldcpy(dev.bus, temp3);
 250
 251                         /* file="value" */
 252                         temp2 = strsep(&temp, ",");
 253                         retval = get_pair(&temp, &temp2, &temp3);
 254                         if (retval)
 255                                 break;
 256                         strfieldcpy(dev.sysfs_file, temp2);
 257                         strfieldcpy(dev.sysfs_value, temp3);
 258
 259                         /* NAME="new_name" */
 260                         temp2 = strsep(&temp, ",");
 261                         retval = get_value("NAME", &temp, &temp3);
 262                         if (retval)
 263                                 break;
 264                         strfieldcpy(dev.name, temp3);
 265
 266                         dbg_parse("LABEL name = '%s', bus = '%s', "
 267                                 "sysfs_file = '%s', sysfs_value = '%s'",
 268                                 dev.name, dev.bus, dev.sysfs_file,
 269                                 dev.sysfs_value);
 270                 }
 271
 272                 if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
 273                         /* number type */
 274                         dev.type = NUMBER;
 275
 276                         /* BUS="bus" */
 277                         retval = get_value("BUS", &temp, &temp3);
 278                         if (retval)
 279                                 break;
 280                         strfieldcpy(dev.bus, temp3);
 281
 282                         /* ID="id" */
 283                         temp2 = strsep(&temp, ",");
 284                         retval = get_value("id", &temp, &temp3);
 285                         if (retval)
 286                                 break;
 287                         strfieldcpy(dev.id, temp3);
 288
 289                         /* NAME="new_name" */
 290                         temp2 = strsep(&temp, ",");
 291                         retval = get_value("NAME", &temp, &temp3);
 292                         if (retval)
 293                                 break;
 294                         strfieldcpy(dev.name, temp3);
 295
 296                         dbg_parse("NUMBER name = '%s', bus = '%s', id = '%s'",
 297                                         dev.name, dev.bus, dev.id);
 298                 }
 299
 300                 if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
 301                         /* number type */
 302                         dev.type = TOPOLOGY;
 303
 304                         /* BUS="bus" */
 305                         retval = get_value("BUS", &temp, &temp3);
 306                         if (retval)
 307                                 break;
 308                         strfieldcpy(dev.bus, temp3);
 309
 310                         /* PLACE="place" */
 311                         temp2 = strsep(&temp, ",");
 312                         retval = get_value("place", &temp, &temp3);
 313                         if (retval)
 314                                 break;
 315                         strfieldcpy(dev.place, temp3);
 316
 317                         /* NAME="new_name" */
 318                         temp2 = strsep(&temp, ",");
 319                         retval = get_value("NAME", &temp, &temp3);
 320                         if (retval)
 321                                 break;
 322                         strfieldcpy(dev.name, temp3);
 323
 324                         dbg_parse("TOPOLOGY name = '%s', bus = '%s', place = '%s'",
 325                                         dev.name, dev.bus, dev.place);
 326                 }
 327
 328                 if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
 329                         /* number type */
 330                         dev.type = REPLACE;
 331
 332                         /* KERNEL="kernel_name" */
 333                         retval = get_value("KERNEL", &temp, &temp3);
 334                         if (retval)
 335                                 break;
 336                         strfieldcpy(dev.kernel_name, temp3);
 337
 338                         /* NAME="new_name" */
 339                         temp2 = strsep(&temp, ",");
 340                         retval = get_value("NAME", &temp, &temp3);
 341                         if (retval)
 342                                 break;
 343                         strfieldcpy(dev.name, temp3);
 344                         dbg_parse("REPLACE name = %s, kernel_name = %s",
 345                                         dev.name, dev.kernel_name);
 346                 }
 347                 if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
 348                         /* number type */
 349                         dev.type = CALLOUT;
 350
 351                         /* PROGRAM="executable" */
 352                         retval = get_value("PROGRAM", &temp, &temp3);
 353                         if (retval)
 354                                 break;
 355                         strfieldcpy(dev.exec_program, temp3);
 356
 357                         /* BUS="bus" */
 358                         temp2 = strsep(&temp, ",");
 359                         retval = get_value("BUS", &temp, &temp3);
 360                         if (retval)
 361                                 break;
 362                         strfieldcpy(dev.bus, temp3);
 363
 364                         /* ID="id" */
 365                         temp2 = strsep(&temp, ",");
 366                         retval = get_value("ID", &temp, &temp3);
 367                         if (retval)
 368                                 break;
 369                         strfieldcpy(dev.id, temp3);
 370
 371                         /* NAME="new_name" */
 372                         temp2 = strsep(&temp, ",");
 373                         retval = get_value("NAME", &temp, &temp3);
 374                         if (retval)
 375                                 break;
 376                         strfieldcpy(dev.name, temp3);
 377                         dbg_parse("CALLOUT name = %s, program = %s",
 378                                         dev.name, dev.exec_program);
 379                 }
 380
 381                 retval = add_dev(&dev);
 382                 if (retval) {
 383                         dbg("add_dev returned with error %d", retval);
 384                         goto exit;
 385                 }
 386         }
 387         dbg_parse("%s:%d:%Zd: error parsing ``%s''", udev_config_filename,
 388                   lineno, temp - line, temp);
 389 exit:
 390         fclose(fd);
 391         return retval;
 392 }
 393
 394
 395 static int namedev_init_permissions(void)
 396 {
 397         char line[255];
 398         char *temp;
 399         char *temp2;
 400         FILE *fd;
 401         int retval = 0;
 402         struct config_device dev;
 403
 404         dbg("opening %s to read as permissions config", udev_config_permission_filename);
 405         fd = fopen(udev_config_permission_filename, "r");
 406         if (fd == NULL) {
 407                 dbg("Can't open %s", udev_config_permission_filename);
 408                 return -ENODEV;
 409         }
 410
 411         /* loop through the whole file */
 412         while (1) {
 413                 /* get a line */
 414                 temp = fgets(line, sizeof(line), fd);
 415                 if (temp == NULL)
 416                         break;
 417
 418                 dbg_parse("read %s", temp);
 419
 420                 /* eat the whitespace at the beginning of the line */
 421                 while (isspace(*temp))
 422                         ++temp;
 423
 424                 /* no more line? */
 425                 if (*temp == 0x00)
 426                         continue;
 427
 428                 /* see if this is a comment */
 429                 if (*temp == COMMENT_CHARACTER)
 430                         continue;
 431
 432                 memset(&dev, 0x00, sizeof(dev));
 433
 434                 /* parse the line */
 435                 temp2 = strsep(&temp, ":");
 436                 strncpy(dev.name, temp2, sizeof(dev.name));
 437
 438                 temp2 = strsep(&temp, ":");
 439                 strncpy(dev.owner, temp2, sizeof(dev.owner));
 440
 441                 temp2 = strsep(&temp, ":");
 442                 strncpy(dev.group, temp2, sizeof(dev.owner));
 443
 444                 dev.mode = strtol(temp, NULL, 8);
 445
 446                 dbg_parse("name = %s, owner = %s, group = %s, mode = %#o",
 447                                 dev.name, dev.owner, dev.group,
 448                                 dev.mode);
 449                 retval = add_dev(&dev);
 450                 if (retval) {
 451                         dbg("add_dev returned with error %d", retval);
 452                         goto exit;
 453                 }
 454         }
 455
 456 exit:
 457         fclose(fd);
 458         return retval;
 459 }
 460
 461 static mode_t get_default_mode(struct sysfs_class_device *class_dev)
 462 {
 463         /* just default everyone to rw for the world! */
 464         return 0666;
 465 }
 466
 467
 468 static int exec_callout(struct config_device *dev, char *value, int len)
 469 {
 470         int retval;
 471         int res;
 472         int status;
 473         int fds[2];
 474         pid_t pid;
 475         int value_set = 0;
 476         char buffer[256];
 477
 478         dbg("callout to %s\n", dev->exec_program);
 479         retval = pipe(fds);
 480         if (retval != 0) {
 481                 dbg("pipe failed");
 482                 return -1;
 483         }
 484         pid = fork();
 485         if (pid == -1) {
 486                 dbg("fork failed");
 487                 return -1;
 488         }
 489
 490         if (pid == 0) {
 491                 /*
 492                  * child
 493                  */
 494                 close(STDOUT_FILENO);
 495                 dup(fds[1]);    /* dup write side of pipe to STDOUT */
 496                 retval = execve(dev->exec_program, main_argv, main_envp);
 497                 if (retval != 0) {
 498                         dbg("child execve failed");
 499                         exit(1);
 500                 }
 501                 return -1; /* avoid compiler warning */
 502         } else {
 503                 /*
 504                  * Parent reads from fds[0].
 505                  */
 506                 close(fds[1]);
 507                 retval = 0;
 508                 while (1) {
 509                         res = read(fds[0], buffer, sizeof(buffer) - 1);
 510                         if (res <= 0)
 511                                 break;
 512                         buffer[res] = '\0';
 513                         if (res > len) {
 514                                 dbg("callout len %d too short\n", len);
 515                                 retval = -1;
 516                         }
 517                         if (value_set) {
 518                                 dbg("callout value already set");
 519                                 retval = -1;
 520                         } else {
 521                                 value_set = 1;
 522                                 strncpy(value, buffer, len);
 523                         }
 524                 }
 525                 close(fds[0]);
 526                 res = wait(&status);
 527                 if (res < 0) {
 528                         dbg("wait failed result %d", res);
 529                         retval = -1;
 530                 }
 531
 532 #ifndef __KLIBC__
 533                 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 534                         dbg("callout program status 0x%x", status);
 535                         retval = -1;
 536                 }
 537 #endif
 538         }
 539         return retval;
 540 }
 541
 542 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev)
 543 {
 544         struct config_device *dev;
 545         struct list_head *tmp;
 546         char value[ID_SIZE];
 547
 548         list_for_each(tmp, &config_device_list) {
 549                 dev = list_entry(tmp, struct config_device, node);
 550                 if (dev->type != CALLOUT)
 551                         continue;
 552
 553                 if (exec_callout(dev, value, sizeof(value)))
 554                         continue;
 555                 if (strncmp(value, dev->id, sizeof(value)) != 0)
 556                         continue;
 557                 strfieldcpy(udev->name, dev->name);
 558                 if (dev->mode != 0) {
 559                         udev->mode = dev->mode;
 560                         strfieldcpy(udev->owner, dev->owner);
 561                         strfieldcpy(udev->group, dev->group);
 562                 }
 563                 dbg_parse("device callout '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 564                         dev->id, udev->name,
 565                         dev->owner, dev->group, dev->mode);
 566                 return 0;
 567         }
 568         return -ENODEV;
 569 }
 570
 571 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 572 {
 573         struct sysfs_attribute *tmpattr = NULL;
 574         struct config_device *dev;
 575         struct list_head *tmp;
 576
 577         list_for_each(tmp, &config_device_list) {
 578                 dev = list_entry(tmp, struct config_device, node);
 579                 if (dev->type != LABEL)
 580                         continue;
 581
 582                 dbg_parse("LABEL: match file '%s' with value '%s'",
 583                                 dev->sysfs_file, dev->sysfs_value);
 584                 /* try to find the attribute in the class device directory */
 585                 tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
 586                 if (tmpattr)
 587                         goto label_found;
 588
 589                 /* look in the class device directory if present */
 590                 if (sysfs_device) {
 591                         tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
 592                         if (tmpattr)
 593                                 goto label_found;
 594                 }
 595
 596                 continue;
 597
 598 label_found:
 599                 tmpattr->value[strlen(tmpattr->value)-1] = 0x00;
 600                 dbg_parse("file '%s' found with value '%s' compare with '%s'", dev->sysfs_file, tmpattr->value, dev->sysfs_value);
 601                 if (strcmp(dev->sysfs_value, tmpattr->value) != 0)
 602                         continue;
 603
 604                 strfieldcpy(udev->name, dev->name);
 605                 if (dev->mode != 0) {
 606                         udev->mode = dev->mode;
 607                         strfieldcpy(udev->owner, dev->owner);
 608                         strfieldcpy(udev->group, dev->group);
 609                 }
 610                 dbg_parse("file '%s' with value '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 611                         dev->sysfs_file, dev->sysfs_value, udev->name,
 612                         dev->owner, dev->group, dev->mode);
 613
 614                 return 0;
 615         }
 616         return -ENODEV;
 617 }
 618
 619 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 620 {
 621         struct config_device *dev;
 622         struct list_head *tmp;
 623         char path[SYSFS_PATH_MAX];
 624         int found;
 625         char *temp = NULL;
 626
 627         /* we have to have a sysfs device for NUMBER to work */
 628         if (!sysfs_device)
 629                 return -ENODEV;
 630
 631         list_for_each(tmp, &config_device_list) {
 632                 dev = list_entry(tmp, struct config_device, node);
 633                 if (dev->type != NUMBER)
 634                         continue;
 635
 636                 found = 0;
 637                 strfieldcpy(path, sysfs_device->path);
 638                 temp = strrchr(path, '/');
 639                 dbg_parse("NUMBER path = '%s'", path);
 640                 dbg_parse("NUMBER temp = '%s' id = '%s'", temp, dev->id);
 641                 if (strstr(temp, dev->id) != NULL) {
 642                         found = 1;
 643                 } else {
 644                         *temp = 0x00;
 645                         temp = strrchr(path, '/');
 646                         dbg_parse("NUMBER temp = '%s' id = '%s'", temp, dev->id);
 647                         if (strstr(temp, dev->id) != NULL)
 648                                 found = 1;
 649                 }
 650                 if (!found)
 651                         continue;
 652                 strfieldcpy(udev->name, dev->name);
 653                 if (dev->mode != 0) {
 654                         udev->mode = dev->mode;
 655                         strfieldcpy(udev->owner, dev->owner);
 656                         strfieldcpy(udev->group, dev->group);
 657                 }
 658                 dbg_parse("device id '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 659                         dev->id, udev->name,
 660                         dev->owner, dev->group, dev->mode);
 661                 return 0;
 662         }
 663         return -ENODEV;
 664 }
 665
 666
 667 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 668 {
 669         struct config_device *dev;
 670         struct list_head *tmp;
 671         char path[SYSFS_PATH_MAX];
 672         int found;
 673         char *temp = NULL;
 674
 675         /* we have to have a sysfs device for TOPOLOGY to work */
 676         if (!sysfs_device)
 677                 return -ENODEV;
 678
 679         list_for_each(tmp, &config_device_list) {
 680                 dev = list_entry(tmp, struct config_device, node);
 681                 if (dev->type != TOPOLOGY)
 682                         continue;
 683
 684                 found = 0;
 685                 strfieldcpy(path, sysfs_device->path);
 686                 temp = strrchr(path, '/');
 687                 dbg_parse("TOPOLOGY path = '%s'", path);
 688                 dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
 689                 if (strstr(temp, dev->place) != NULL) {
 690                         found = 1;
 691                 } else {
 692                         *temp = 0x00;
 693                         temp = strrchr(path, '/');
 694                         dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
 695                         if (strstr(temp, dev->place) != NULL)
 696                                 found = 1;
 697                 }
 698                 if (!found)
 699                         continue;
 700
 701                 strfieldcpy(udev->name, dev->name);
 702                 if (dev->mode != 0) {
 703                         udev->mode = dev->mode;
 704                         strfieldcpy(udev->owner, dev->owner);
 705                         strfieldcpy(udev->group, dev->group);
 706                 }
 707                 dbg_parse("device at '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 708                         dev->place, udev->name,
 709                         dev->owner, dev->group, dev->mode);
 710
 711                 return 0;
 712         }
 713         return -ENODEV;
 714 }
 715
 716 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev)
 717 {
 718         struct config_device *dev;
 719         struct list_head *tmp;
 720
 721         list_for_each(tmp, &config_device_list) {
 722                 dev = list_entry(tmp, struct config_device, node);
 723                 if (dev->type != REPLACE)
 724                         continue;
 725
 726                 dbg_parse("REPLACE: replace name '%s' with '%s'",
 727                           dev->kernel_name, dev->name);
 728                 if (strcmp(dev->kernel_name, class_dev->name) != 0)
 729                         continue;
 730
 731                 strfieldcpy(udev->name, dev->name);
 732                 if (dev->mode != 0) {
 733                         udev->mode = dev->mode;
 734                         strfieldcpy(udev->owner, dev->owner);
 735                         strfieldcpy(udev->group, dev->group);
 736                 }
 737                 dbg_parse("'%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 738                         dev->kernel_name, udev->name,
 739                         dev->owner, dev->group, dev->mode);
 740
 741                 return 0;
 742         }
 743         return -ENODEV;
 744 }
 745
 746 static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
 747 {
 748         struct sysfs_device *sysfs_device = NULL;
 749         struct sysfs_class_device *class_dev_parent = NULL;
 750         int retval = 0;
 751         char *temp = NULL;
 752
 753         udev->mode = 0;
 754
 755         /* find the sysfs_device for this class device */
 756         /* Wouldn't it really be nice if libsysfs could do this for us? */
 757         if (class_dev->sysdevice) {
 758                 sysfs_device = class_dev->sysdevice;
 759         } else {
 760                 /* bah, let's go backwards up a level to see if the device is there,
 761                  * as block partitions don't point to the physical device.  Need to fix that
 762                  * up in the kernel...
 763                  */
 764                 if (strstr(class_dev->path, "block")) {
 765                         dbg_parse("looking at block device...");
 766                         if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
 767                                 char path[SYSFS_PATH_MAX];
 768
 769                                 dbg_parse("really is a partition...");
 770                                 strfieldcpy(path, class_dev->path);
 771                                 temp = strrchr(path, '/');
 772                                 *temp = 0x00;
 773                                 dbg_parse("looking for a class device at '%s'", path);
 774                                 class_dev_parent = sysfs_open_class_device(path);
 775                                 if (class_dev_parent == NULL) {
 776                                         dbg("sysfs_open_class_device at '%s' failed", path);
 777                                 } else {
 778                                         dbg_parse("class_dev_parent->name = %s", class_dev_parent->name);
 779                                         if (class_dev_parent->sysdevice)
 780                                                 sysfs_device = class_dev_parent->sysdevice;
 781                                 }
 782                         }
 783                 }
 784         }
 785
 786         if (sysfs_device) {
 787                 dbg_parse("sysfs_device->path = '%s'", sysfs_device->path);
 788                 dbg_parse("sysfs_device->bus_id = '%s'", sysfs_device->bus_id);
 789         } else {
 790                 dbg_parse("class_dev->name = '%s'", class_dev->name);
 791         }
 792
 793         /* rules are looked at in priority order */
 794         retval = do_callout(class_dev, udev);
 795         if (retval == 0)
 796                 goto done;
 797
 798         retval = do_label(class_dev, udev, sysfs_device);
 799         if (retval == 0)
 800                 goto done;
 801
 802         retval = do_number(class_dev, udev, sysfs_device);
 803         if (retval == 0)
 804                 goto done;
 805
 806         retval = do_topology(class_dev, udev, sysfs_device);
 807         if (retval == 0)
 808                 goto done;
 809
 810         retval = do_replace(class_dev, udev);
 811         if (retval == 0)
 812                 goto done;
 813
 814         strfieldcpy(udev->name, class_dev->name);
 815
 816 done:
 817         /* substitute placeholder in NAME  */
 818         while (1) {
 819                 char *pos = strchr(udev->name, '%');
 820                 char *dig;
 821                 char name[NAME_SIZE];
 822                 if (pos) {
 823                         strfieldcpy(name, pos+2);
 824                         *pos = 0x00;
 825                         switch (pos[1]) {
 826                         case 'b':
 827                                 if (!sysfs_device)
 828                                         break;
 829                                 strcat(udev->name, sysfs_device->bus_id);
 830                                 dbg("bus_id appended: %s",
 831                                                 sysfs_device->bus_id);
 832                                 break;
 833                         case 'n':
 834                                 dig = class_dev->name + strlen(class_dev->name);
 835                                 while (isdigit(*(dig-1)))
 836                                         dig--;
 837                                 strcat(udev->name, dig);
 838                                 dbg("kernel number appended: %s", dig);
 839                                 break;
 840                         case 'm':
 841                                 sprintf(pos, "%u", udev->minor);
 842                                 dbg("minor number appended: %u", udev->minor);
 843                                 break;
 844                         case 'M':
 845                                 sprintf(pos, "%u", udev->major);
 846                                 dbg("major number appended: %u", udev->major);
 847                                 break;
 848                         default:
 849                                 dbg("unknown substitution type: %%%c", pos[1]);
 850                                 break;
 851                         }
 852                         strcat(udev->name, name);
 853                 } else
 854                         break;
 855         }
 856
 857         /* mode was never set above */
 858         if (!udev->mode) {
 859                 udev->mode = get_default_mode(class_dev);
 860                 udev->owner[0] = 0x00;
 861                 udev->group[0] = 0x00;
 862         }
 863
 864         if (class_dev_parent)
 865                 sysfs_close_class_device(class_dev_parent);
 866
 867         return 0;
 868 }
 869
 870 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev)
 871 {
 872         int retval;
 873
 874         retval = get_attr(class_dev, dev);
 875         if (retval)
 876                 dbg("get_attr failed");
 877
 878         return retval;
 879 }
 880
 881 int namedev_init(void)
 882 {
 883         int retval;
 884
 885         retval = namedev_init_config();
 886         if (retval)
 887                 return retval;
 888
 889         retval = namedev_init_permissions();
 890         if (retval)
 891                 return retval;
 892
 893         dump_dev_list();
 894         return retval;
 895 }
 896
 897