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         /* update the values if we already have the device */
 109         list_for_each(tmp, &config_device_list) {
 110                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 111                 int len = strlen(new_dev->name);
 112                 if (new_dev->name[len-1] == '*') {
 113                         len--;
 114                         if (strncmp(dev->name, new_dev->name, len))
 115                                 continue;
 116                 } else {
 117                         if (strcmp(dev->name, new_dev->name))
 118                                 continue;
 119                 }
 120                 /* the same, copy the new info into this structure */
 121                 copy_var(dev, new_dev, type);
 122                 copy_var(dev, new_dev, mode);
 123                 copy_string(dev, new_dev, bus);
 124                 copy_string(dev, new_dev, sysfs_file);
 125                 copy_string(dev, new_dev, sysfs_value);
 126                 copy_string(dev, new_dev, id);
 127                 copy_string(dev, new_dev, place);
 128                 copy_string(dev, new_dev, kernel_name);
 129                 copy_string(dev, new_dev, owner);
 130                 copy_string(dev, new_dev, group);
 131                 return 0;
 132         }
 133
 134         /* not found, lets create a new structure, and add it to the list */
 135         tmp_dev = malloc(sizeof(*tmp_dev));
 136         if (!tmp_dev)
 137                 return -ENOMEM;
 138         memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
 139         list_add(&tmp_dev->node, &config_device_list);
 140         //dump_dev(tmp_dev);
 141         return 0;
 142 }
 143
 144 static void dump_dev_list(void)
 145 {
 146         struct list_head *tmp;
 147
 148         list_for_each(tmp, &config_device_list) {
 149                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 150                 dump_dev(dev);
 151         }
 152 }
 153
 154 static int get_pair(char **orig_string, char **left, char **right)
 155 {
 156         char *temp;
 157         char *string = *orig_string;
 158
 159         if (!string)
 160                 return -ENODEV;
 161
 162         /* eat any whitespace */
 163         while (isspace(*string))
 164                 ++string;
 165
 166         /* split based on '=' */
 167         temp = strsep(&string, "=");
 168         *left = temp;
 169         if (!string)
 170                 return -ENODEV;
 171
 172         /* take the right side and strip off the '"' */
 173         while (isspace(*string))
 174                 ++string;
 175         if (*string == '"')
 176                 ++string;
 177         else
 178                 return -ENODEV;
 179
 180         temp = strsep(&string, "\"");
 181         if (!string || *temp == '\0')
 182                 return -ENODEV;
 183         *right = temp;
 184         *orig_string = string;
 185
 186         return 0;
 187 }
 188
 189 static int get_value(const char *left, char **orig_string, char **ret_string)
 190 {
 191         int retval;
 192         char *left_string;
 193
 194         retval = get_pair(orig_string, &left_string, ret_string);
 195         if (retval)
 196                 return retval;
 197         if (strcasecmp(left_string, left) != 0)
 198                 return -ENODEV;
 199         return 0;
 200 }
 201
 202 static int namedev_init_config(void)
 203 {
 204         char line[255];
 205         int lineno;
 206         char *temp;
 207         char *temp2;
 208         char *temp3;
 209         FILE *fd;
 210         int retval = 0;
 211         struct config_device dev;
 212
 213         dbg("opening %s to read as config", udev_config_filename);
 214         fd = fopen(udev_config_filename, "r");
 215         if (fd == NULL) {
 216                 dbg("Can't open %s", udev_config_filename);
 217                 return -ENODEV;
 218         }
 219
 220         /* loop through the whole file */
 221         lineno = 0;
 222         while (1) {
 223                 /* get a line */
 224                 temp = fgets(line, sizeof(line), fd);
 225                 if (temp == NULL)
 226                         goto exit;
 227                 lineno++;
 228
 229                 dbg_parse("read %s", temp);
 230
 231                 /* eat the whitespace at the beginning of the line */
 232                 while (isspace(*temp))
 233                         ++temp;
 234
 235                 /* no more line? */
 236                 if (*temp == 0x00)
 237                         continue;
 238
 239                 /* see if this is a comment */
 240                 if (*temp == COMMENT_CHARACTER)
 241                         continue;
 242
 243                 memset(&dev, 0x00, sizeof(struct config_device));
 244
 245                 /* parse the line */
 246                 temp2 = strsep(&temp, ",");
 247                 if (strcasecmp(temp2, TYPE_LABEL) == 0) {
 248                         /* label type */
 249                         dev.type = LABEL;
 250
 251                         /* BUS="bus" */
 252                         retval = get_value("BUS", &temp, &temp3);
 253                         if (retval)
 254                                 break;
 255                         strfieldcpy(dev.bus, temp3);
 256
 257                         /* file="value" */
 258                         temp2 = strsep(&temp, ",");
 259                         retval = get_pair(&temp, &temp2, &temp3);
 260                         if (retval)
 261                                 break;
 262                         strfieldcpy(dev.sysfs_file, temp2);
 263                         strfieldcpy(dev.sysfs_value, temp3);
 264
 265                         /* NAME="new_name" */
 266                         temp2 = strsep(&temp, ",");
 267                         retval = get_value("NAME", &temp, &temp3);
 268                         if (retval)
 269                                 break;
 270                         strfieldcpy(dev.name, temp3);
 271
 272                         dbg_parse("LABEL name = '%s', bus = '%s', "
 273                                 "sysfs_file = '%s', sysfs_value = '%s'",
 274                                 dev.name, dev.bus, dev.sysfs_file,
 275                                 dev.sysfs_value);
 276                 }
 277
 278                 if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
 279                         /* number type */
 280                         dev.type = NUMBER;
 281
 282                         /* BUS="bus" */
 283                         retval = get_value("BUS", &temp, &temp3);
 284                         if (retval)
 285                                 break;
 286                         strfieldcpy(dev.bus, temp3);
 287
 288                         /* ID="id" */
 289                         temp2 = strsep(&temp, ",");
 290                         retval = get_value("id", &temp, &temp3);
 291                         if (retval)
 292                                 break;
 293                         strfieldcpy(dev.id, temp3);
 294
 295                         /* NAME="new_name" */
 296                         temp2 = strsep(&temp, ",");
 297                         retval = get_value("NAME", &temp, &temp3);
 298                         if (retval)
 299                                 break;
 300                         strfieldcpy(dev.name, temp3);
 301
 302                         dbg_parse("NUMBER name = '%s', bus = '%s', id = '%s'",
 303                                         dev.name, dev.bus, dev.id);
 304                 }
 305
 306                 if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
 307                         /* number type */
 308                         dev.type = TOPOLOGY;
 309
 310                         /* BUS="bus" */
 311                         retval = get_value("BUS", &temp, &temp3);
 312                         if (retval)
 313                                 break;
 314                         strfieldcpy(dev.bus, temp3);
 315
 316                         /* PLACE="place" */
 317                         temp2 = strsep(&temp, ",");
 318                         retval = get_value("place", &temp, &temp3);
 319                         if (retval)
 320                                 break;
 321                         strfieldcpy(dev.place, temp3);
 322
 323                         /* NAME="new_name" */
 324                         temp2 = strsep(&temp, ",");
 325                         retval = get_value("NAME", &temp, &temp3);
 326                         if (retval)
 327                                 break;
 328                         strfieldcpy(dev.name, temp3);
 329
 330                         dbg_parse("TOPOLOGY name = '%s', bus = '%s', place = '%s'",
 331                                         dev.name, dev.bus, dev.place);
 332                 }
 333
 334                 if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
 335                         /* number type */
 336                         dev.type = REPLACE;
 337
 338                         /* KERNEL="kernel_name" */
 339                         retval = get_value("KERNEL", &temp, &temp3);
 340                         if (retval)
 341                                 break;
 342                         strfieldcpy(dev.kernel_name, temp3);
 343
 344                         /* NAME="new_name" */
 345                         temp2 = strsep(&temp, ",");
 346                         retval = get_value("NAME", &temp, &temp3);
 347                         if (retval)
 348                                 break;
 349                         strfieldcpy(dev.name, temp3);
 350                         dbg_parse("REPLACE name = %s, kernel_name = %s",
 351                                         dev.name, dev.kernel_name);
 352                 }
 353                 if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
 354                         /* number type */
 355                         dev.type = CALLOUT;
 356
 357                         /* PROGRAM="executable" */
 358                         retval = get_value("PROGRAM", &temp, &temp3);
 359                         if (retval)
 360                                 break;
 361                         strfieldcpy(dev.exec_program, temp3);
 362
 363                         /* BUS="bus" */
 364                         temp2 = strsep(&temp, ",");
 365                         retval = get_value("BUS", &temp, &temp3);
 366                         if (retval)
 367                                 break;
 368                         strfieldcpy(dev.bus, temp3);
 369
 370                         /* ID="id" */
 371                         temp2 = strsep(&temp, ",");
 372                         retval = get_value("ID", &temp, &temp3);
 373                         if (retval)
 374                                 break;
 375                         strfieldcpy(dev.id, temp3);
 376
 377                         /* NAME="new_name" */
 378                         temp2 = strsep(&temp, ",");
 379                         retval = get_value("NAME", &temp, &temp3);
 380                         if (retval)
 381                                 break;
 382                         strfieldcpy(dev.name, temp3);
 383                         dbg_parse("CALLOUT name = %s, program = %s",
 384                                         dev.name, dev.exec_program);
 385                 }
 386
 387                 retval = add_dev(&dev);
 388                 if (retval) {
 389                         dbg("add_dev returned with error %d", retval);
 390                         goto exit;
 391                 }
 392         }
 393         dbg_parse("%s:%d:%Zd: error parsing ``%s''", udev_config_filename,
 394                   lineno, temp - line, temp);
 395 exit:
 396         fclose(fd);
 397         return retval;
 398 }
 399
 400
 401 static int namedev_init_permissions(void)
 402 {
 403         char line[255];
 404         char *temp;
 405         char *temp2;
 406         FILE *fd;
 407         int retval = 0;
 408         struct config_device dev;
 409
 410         dbg("opening %s to read as permissions config", udev_config_permission_filename);
 411         fd = fopen(udev_config_permission_filename, "r");
 412         if (fd == NULL) {
 413                 dbg("Can't open %s", udev_config_permission_filename);
 414                 return -ENODEV;
 415         }
 416
 417         /* loop through the whole file */
 418         while (1) {
 419                 /* get a line */
 420                 temp = fgets(line, sizeof(line), fd);
 421                 if (temp == NULL)
 422                         break;
 423
 424                 dbg_parse("read %s", temp);
 425
 426                 /* eat the whitespace at the beginning of the line */
 427                 while (isspace(*temp))
 428                         ++temp;
 429
 430                 /* no more line? */
 431                 if (*temp == 0x00)
 432                         continue;
 433
 434                 /* see if this is a comment */
 435                 if (*temp == COMMENT_CHARACTER)
 436                         continue;
 437
 438                 memset(&dev, 0x00, sizeof(dev));
 439
 440                 /* parse the line */
 441                 temp2 = strsep(&temp, ":");
 442                 strncpy(dev.name, temp2, sizeof(dev.name));
 443
 444                 temp2 = strsep(&temp, ":");
 445                 strncpy(dev.owner, temp2, sizeof(dev.owner));
 446
 447                 temp2 = strsep(&temp, ":");
 448                 strncpy(dev.group, temp2, sizeof(dev.owner));
 449
 450                 dev.mode = strtol(temp, NULL, 8);
 451
 452                 dbg_parse("name = %s, owner = %s, group = %s, mode = %#o",
 453                                 dev.name, dev.owner, dev.group,
 454                                 dev.mode);
 455                 retval = add_dev(&dev);
 456                 if (retval) {
 457                         dbg("add_dev returned with error %d", retval);
 458                         goto exit;
 459                 }
 460         }
 461
 462 exit:
 463         fclose(fd);
 464         return retval;
 465 }
 466
 467 static mode_t get_default_mode(struct sysfs_class_device *class_dev)
 468 {
 469         /* just default everyone to rw for the world! */
 470         return 0666;
 471 }
 472
 473
 474 static int exec_callout(struct config_device *dev, char *value, int len)
 475 {
 476         int retval;
 477         int res;
 478         int status;
 479         int fds[2];
 480         pid_t pid;
 481         int value_set = 0;
 482         char buffer[256];
 483
 484         dbg("callout to %s\n", dev->exec_program);
 485         retval = pipe(fds);
 486         if (retval != 0) {
 487                 dbg("pipe failed");
 488                 return -1;
 489         }
 490         pid = fork();
 491         if (pid == -1) {
 492                 dbg("fork failed");
 493                 return -1;
 494         }
 495
 496         if (pid == 0) {
 497                 /*
 498                  * child
 499                  */
 500                 close(STDOUT_FILENO);
 501                 dup(fds[1]);    /* dup write side of pipe to STDOUT */
 502                 retval = execve(dev->exec_program, main_argv, main_envp);
 503                 if (retval != 0) {
 504                         dbg("child execve failed");
 505                         exit(1);
 506                 }
 507                 return -1; /* avoid compiler warning */
 508         } else {
 509                 /*
 510                  * Parent reads from fds[0].
 511                  */
 512                 close(fds[1]);
 513                 retval = 0;
 514                 while (1) {
 515                         res = read(fds[0], buffer, sizeof(buffer) - 1);
 516                         if (res <= 0)
 517                                 break;
 518                         buffer[res] = '\0';
 519                         if (res > len) {
 520                                 dbg("callout len %d too short\n", len);
 521                                 retval = -1;
 522                         }
 523                         if (value_set) {
 524                                 dbg("callout value already set");
 525                                 retval = -1;
 526                         } else {
 527                                 value_set = 1;
 528                                 strncpy(value, buffer, len);
 529                         }
 530                 }
 531                 close(fds[0]);
 532                 res = wait(&status);
 533                 if (res < 0) {
 534                         dbg("wait failed result %d", res);
 535                         retval = -1;
 536                 }
 537
 538 #ifndef __KLIBC__
 539                 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 540                         dbg("callout program status 0x%x", status);
 541                         retval = -1;
 542                 }
 543 #endif
 544         }
 545         return retval;
 546 }
 547
 548 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev)
 549 {
 550         struct config_device *dev;
 551         struct list_head *tmp;
 552         char value[ID_SIZE];
 553
 554         list_for_each(tmp, &config_device_list) {
 555                 dev = list_entry(tmp, struct config_device, node);
 556                 if (dev->type != CALLOUT)
 557                         continue;
 558
 559                 if (exec_callout(dev, value, sizeof(value)))
 560                         continue;
 561                 if (strncmp(value, dev->id, sizeof(value)) != 0)
 562                         continue;
 563                 strfieldcpy(udev->name, dev->name);
 564                 if (dev->mode != 0) {
 565                         udev->mode = dev->mode;
 566                         strfieldcpy(udev->owner, dev->owner);
 567                         strfieldcpy(udev->group, dev->group);
 568                 }
 569                 dbg_parse("device callout '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 570                         dev->id, udev->name,
 571                         dev->owner, dev->group, dev->mode);
 572                 return 0;
 573         }
 574         return -ENODEV;
 575 }
 576
 577 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 578 {
 579         struct sysfs_attribute *tmpattr = NULL;
 580         struct config_device *dev;
 581         struct list_head *tmp;
 582
 583         list_for_each(tmp, &config_device_list) {
 584                 dev = list_entry(tmp, struct config_device, node);
 585                 if (dev->type != LABEL)
 586                         continue;
 587
 588                 dbg_parse("LABEL: match file '%s' with value '%s'",
 589                                 dev->sysfs_file, dev->sysfs_value);
 590                 /* try to find the attribute in the class device directory */
 591                 tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
 592                 if (tmpattr)
 593                         goto label_found;
 594
 595                 /* look in the class device directory if present */
 596                 if (sysfs_device) {
 597                         tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
 598                         if (tmpattr)
 599                                 goto label_found;
 600                 }
 601
 602                 continue;
 603
 604 label_found:
 605                 tmpattr->value[strlen(tmpattr->value)-1] = 0x00;
 606                 dbg_parse("file '%s' found with value '%s' compare with '%s'", dev->sysfs_file, tmpattr->value, dev->sysfs_value);
 607                 if (strcmp(dev->sysfs_value, tmpattr->value) != 0)
 608                         continue;
 609
 610                 strfieldcpy(udev->name, dev->name);
 611                 if (dev->mode != 0) {
 612                         udev->mode = dev->mode;
 613                         strfieldcpy(udev->owner, dev->owner);
 614                         strfieldcpy(udev->group, dev->group);
 615                 }
 616                 dbg_parse("file '%s' with value '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 617                         dev->sysfs_file, dev->sysfs_value, udev->name,
 618                         dev->owner, dev->group, dev->mode);
 619
 620                 return 0;
 621         }
 622         return -ENODEV;
 623 }
 624
 625 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 626 {
 627         struct config_device *dev;
 628         struct list_head *tmp;
 629         char path[SYSFS_PATH_MAX];
 630         int found;
 631         char *temp = NULL;
 632
 633         /* we have to have a sysfs device for NUMBER to work */
 634         if (!sysfs_device)
 635                 return -ENODEV;
 636
 637         list_for_each(tmp, &config_device_list) {
 638                 dev = list_entry(tmp, struct config_device, node);
 639                 if (dev->type != NUMBER)
 640                         continue;
 641
 642                 found = 0;
 643                 strfieldcpy(path, sysfs_device->path);
 644                 temp = strrchr(path, '/');
 645                 dbg_parse("NUMBER path = '%s'", path);
 646                 dbg_parse("NUMBER temp = '%s' id = '%s'", temp, dev->id);
 647                 if (strstr(temp, dev->id) != NULL) {
 648                         found = 1;
 649                 } else {
 650                         *temp = 0x00;
 651                         temp = strrchr(path, '/');
 652                         dbg_parse("NUMBER temp = '%s' id = '%s'", temp, dev->id);
 653                         if (strstr(temp, dev->id) != NULL)
 654                                 found = 1;
 655                 }
 656                 if (!found)
 657                         continue;
 658                 strfieldcpy(udev->name, dev->name);
 659                 if (dev->mode != 0) {
 660                         udev->mode = dev->mode;
 661                         strfieldcpy(udev->owner, dev->owner);
 662                         strfieldcpy(udev->group, dev->group);
 663                 }
 664                 dbg_parse("device id '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 665                         dev->id, udev->name,
 666                         dev->owner, dev->group, dev->mode);
 667                 return 0;
 668         }
 669         return -ENODEV;
 670 }
 671
 672
 673 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 674 {
 675         struct config_device *dev;
 676         struct list_head *tmp;
 677         char path[SYSFS_PATH_MAX];
 678         int found;
 679         char *temp = NULL;
 680
 681         /* we have to have a sysfs device for TOPOLOGY to work */
 682         if (!sysfs_device)
 683                 return -ENODEV;
 684
 685         list_for_each(tmp, &config_device_list) {
 686                 dev = list_entry(tmp, struct config_device, node);
 687                 if (dev->type != TOPOLOGY)
 688                         continue;
 689
 690                 found = 0;
 691                 strfieldcpy(path, sysfs_device->path);
 692                 temp = strrchr(path, '/');
 693                 dbg_parse("TOPOLOGY path = '%s'", path);
 694                 dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
 695                 if (strstr(temp, dev->place) != NULL) {
 696                         found = 1;
 697                 } else {
 698                         *temp = 0x00;
 699                         temp = strrchr(path, '/');
 700                         dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
 701                         if (strstr(temp, dev->place) != NULL)
 702                                 found = 1;
 703                 }
 704                 if (!found)
 705                         continue;
 706
 707                 strfieldcpy(udev->name, dev->name);
 708                 if (dev->mode != 0) {
 709                         udev->mode = dev->mode;
 710                         strfieldcpy(udev->owner, dev->owner);
 711                         strfieldcpy(udev->group, dev->group);
 712                 }
 713                 dbg_parse("device at '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 714                         dev->place, udev->name,
 715                         dev->owner, dev->group, dev->mode);
 716
 717                 return 0;
 718         }
 719         return -ENODEV;
 720 }
 721
 722 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev)
 723 {
 724         struct config_device *dev;
 725         struct list_head *tmp;
 726
 727         list_for_each(tmp, &config_device_list) {
 728                 dev = list_entry(tmp, struct config_device, node);
 729                 if (dev->type != REPLACE)
 730                         continue;
 731
 732                 dbg_parse("REPLACE: replace name '%s' with '%s'",
 733                           dev->kernel_name, dev->name);
 734                 if (strcmp(dev->kernel_name, class_dev->name) != 0)
 735                         continue;
 736
 737                 strfieldcpy(udev->name, dev->name);
 738                 if (dev->mode != 0) {
 739                         udev->mode = dev->mode;
 740                         strfieldcpy(udev->owner, dev->owner);
 741                         strfieldcpy(udev->group, dev->group);
 742                 }
 743                 dbg_parse("'%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
 744                         dev->kernel_name, udev->name,
 745                         dev->owner, dev->group, dev->mode);
 746
 747                 return 0;
 748         }
 749         return -ENODEV;
 750 }
 751
 752 static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
 753 {
 754         struct config_device *dev;
 755         struct list_head *tmp;
 756         int len;
 757
 758         strfieldcpy(udev->name, class_dev->name);
 759         list_for_each(tmp, &config_device_list) {
 760                 dev = list_entry(tmp, struct config_device, node);
 761                 len = strlen(dev->name);
 762                 if (dev->name[len-1] == '*') {
 763                         len--;
 764                         if (strncmp(dev->name, class_dev->name, len))
 765                                 continue;
 766                 } else {
 767                         if (strcmp(dev->name, class_dev->name))
 768                                 continue;
 769                 }
 770                 if (dev->mode != 0) {
 771                         dbg_parse("found permissions from config for '%s'", class_dev->name);
 772                         udev->mode = dev->mode;
 773                         strfieldcpy(udev->owner, dev->owner);
 774                         strfieldcpy(udev->group, dev->group);
 775                 }
 776         }
 777 }
 778
 779 static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
 780 {
 781         struct sysfs_device *sysfs_device = NULL;
 782         struct sysfs_class_device *class_dev_parent = NULL;
 783         int retval = 0;
 784         char *temp = NULL;
 785
 786         udev->mode = 0;
 787
 788         /* find the sysfs_device for this class device */
 789         /* Wouldn't it really be nice if libsysfs could do this for us? */
 790         if (class_dev->sysdevice) {
 791                 sysfs_device = class_dev->sysdevice;
 792         } else {
 793                 /* bah, let's go backwards up a level to see if the device is there,
 794                  * as block partitions don't point to the physical device.  Need to fix that
 795                  * up in the kernel...
 796                  */
 797                 if (strstr(class_dev->path, "block")) {
 798                         dbg_parse("looking at block device...");
 799                         if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
 800                                 char path[SYSFS_PATH_MAX];
 801
 802                                 dbg_parse("really is a partition...");
 803                                 strfieldcpy(path, class_dev->path);
 804                                 temp = strrchr(path, '/');
 805                                 *temp = 0x00;
 806                                 dbg_parse("looking for a class device at '%s'", path);
 807                                 class_dev_parent = sysfs_open_class_device(path);
 808                                 if (class_dev_parent == NULL) {
 809                                         dbg("sysfs_open_class_device at '%s' failed", path);
 810                                 } else {
 811                                         dbg_parse("class_dev_parent->name = %s", class_dev_parent->name);
 812                                         if (class_dev_parent->sysdevice)
 813                                                 sysfs_device = class_dev_parent->sysdevice;
 814                                 }
 815                         }
 816                 }
 817         }
 818
 819         if (sysfs_device) {
 820                 dbg_parse("sysfs_device->path = '%s'", sysfs_device->path);
 821                 dbg_parse("sysfs_device->bus_id = '%s'", sysfs_device->bus_id);
 822         } else {
 823                 dbg_parse("class_dev->name = '%s'", class_dev->name);
 824         }
 825
 826         /* rules are looked at in priority order */
 827         retval = do_callout(class_dev, udev);
 828         if (retval == 0)
 829                 goto found;
 830
 831         retval = do_label(class_dev, udev, sysfs_device);
 832         if (retval == 0)
 833                 goto found;
 834
 835         retval = do_number(class_dev, udev, sysfs_device);
 836         if (retval == 0)
 837                 goto found;
 838
 839         retval = do_topology(class_dev, udev, sysfs_device);
 840         if (retval == 0)
 841                 goto found;
 842
 843         retval = do_replace(class_dev, udev);
 844         if (retval == 0)
 845                 goto found;
 846
 847         do_kernelname(class_dev, udev);
 848         goto done;
 849
 850 found:
 851         /* substitute placeholder in NAME  */
 852         while (1) {
 853                 char *pos = strchr(udev->name, '%');
 854                 char *dig;
 855                 char name[NAME_SIZE];
 856                 if (pos) {
 857                         strfieldcpy(name, pos+2);
 858                         *pos = 0x00;
 859                         switch (pos[1]) {
 860                         case 'b':
 861                                 if (!sysfs_device)
 862                                         break;
 863                                 strcat(udev->name, sysfs_device->bus_id);
 864                                 dbg("bus_id appended: %s",
 865                                                 sysfs_device->bus_id);
 866                                 break;
 867                         case 'n':
 868                                 dig = class_dev->name + strlen(class_dev->name);
 869                                 while (isdigit(*(dig-1)))
 870                                         dig--;
 871                                 strcat(udev->name, dig);
 872                                 dbg("kernel number appended: %s", dig);
 873                                 break;
 874                         case 'm':
 875                                 sprintf(pos, "%u", udev->minor);
 876                                 dbg("minor number appended: %u", udev->minor);
 877                                 break;
 878                         case 'M':
 879                                 sprintf(pos, "%u", udev->major);
 880                                 dbg("major number appended: %u", udev->major);
 881                                 break;
 882                         default:
 883                                 dbg("unknown substitution type: %%%c", pos[1]);
 884                                 break;
 885                         }
 886                         strcat(udev->name, name);
 887                 } else
 888                         break;
 889         }
 890
 891 done:
 892         /* mode was never set above */
 893         if (!udev->mode) {
 894                 udev->mode = get_default_mode(class_dev);
 895                 udev->owner[0] = 0x00;
 896                 udev->group[0] = 0x00;
 897         }
 898
 899         if (class_dev_parent)
 900                 sysfs_close_class_device(class_dev_parent);
 901
 902         return 0;
 903 }
 904
 905 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev)
 906 {
 907         int retval;
 908
 909         retval = get_attr(class_dev, dev);
 910         if (retval)
 911                 dbg("get_attr failed");
 912
 913         return retval;
 914 }
 915
 916 int namedev_init(void)
 917 {
 918         int retval;
 919
 920         retval = namedev_init_config();
 921         if (retval)
 922                 return retval;
 923
 924         retval = namedev_init_permissions();
 925         if (retval)
 926                 return retval;
 927
 928         dump_dev_list();
 929         return retval;
 930 }
 931
 932