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 #define CALLOUT_MAXARG  8
  49
  50 static LIST_HEAD(config_device_list);
  51
  52 static void dump_dev(struct config_device *dev)
  53 {
  54         switch (dev->type) {
  55         case KERNEL_NAME:
  56                 dbg_parse("KERNEL name='%s' ,"
  57                           "owner='%s', group='%s', mode=%#o",
  58                           dev->name, 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 method");
  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, add new structure to the device 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                 /* empty 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                         /* BUS="bus" */
 358                         retval = get_value("BUS", &temp, &temp3);
 359                         if (retval)
 360                                 break;
 361                         strfieldcpy(dev.bus, temp3);
 362
 363                         /* PROGRAM="executable" */
 364                         temp2 = strsep(&temp, ",");
 365                         retval = get_value("PROGRAM", &temp, &temp3);
 366                         if (retval)
 367                                 break;
 368                         strfieldcpy(dev.exec_program, 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                 /* empty 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         char *arg;
 484         char *args[CALLOUT_MAXARG];
 485         int i;
 486
 487         dbg("callout to '%s'", dev->exec_program);
 488         retval = pipe(fds);
 489         if (retval != 0) {
 490                 dbg("pipe failed");
 491                 return -1;
 492         }
 493         pid = fork();
 494         if (pid == -1) {
 495                 dbg("fork failed");
 496                 return -1;
 497         }
 498
 499         if (pid == 0) {
 500                 /* child */
 501                 close(STDOUT_FILENO);
 502                 dup(fds[1]);    /* dup write side of pipe to STDOUT */
 503                 if (strchr(dev->exec_program, ' ')) {
 504                         /* callout with arguments */
 505                         arg = dev->exec_program;
 506                         for (i=0; i < CALLOUT_MAXARG-1; i++) {
 507                                 args[i] = strsep(&arg, " ");
 508                                 if (args[i] == NULL)
 509                                         break;
 510                         }
 511                         if (args[i]) {
 512                                 dbg("to many args - %d", i);
 513                                 args[i] = NULL;
 514                         }
 515                         retval = execve(args[0], args, main_envp);
 516                 } else {
 517                         retval = execve(dev->exec_program, main_argv, main_envp);
 518                 }
 519                 if (retval != 0) {
 520                         dbg("child execve failed");
 521                         exit(1);
 522                 }
 523                 return -1; /* avoid compiler warning */
 524         } else {
 525                 /* parent reads from fds[0] */
 526                 close(fds[1]);
 527                 retval = 0;
 528                 while (1) {
 529                         res = read(fds[0], buffer, sizeof(buffer) - 1);
 530                         if (res <= 0)
 531                                 break;
 532                         buffer[res] = '\0';
 533                         if (res > len) {
 534                                 dbg("callout len %d too short\n", len);
 535                                 retval = -1;
 536                         }
 537                         if (value_set) {
 538                                 dbg("callout value already set");
 539                                 retval = -1;
 540                         } else {
 541                                 value_set = 1;
 542                                 strncpy(value, buffer, len);
 543                         }
 544                 }
 545                 dbg("callout returned '%s'", value);
 546                 close(fds[0]);
 547                 res = wait(&status);
 548                 if (res < 0) {
 549                         dbg("wait failed result %d", res);
 550                         retval = -1;
 551                 }
 552
 553 #ifndef __KLIBC__
 554                 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 555                         dbg("callout program status 0x%x", status);
 556                         retval = -1;
 557                 }
 558 #endif
 559         }
 560         return retval;
 561 }
 562
 563 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev)
 564 {
 565         struct config_device *dev;
 566         struct list_head *tmp;
 567         char value[ID_SIZE];
 568
 569         list_for_each(tmp, &config_device_list) {
 570                 dev = list_entry(tmp, struct config_device, node);
 571                 if (dev->type != CALLOUT)
 572                         continue;
 573
 574                 if (exec_callout(dev, value, sizeof(value)))
 575                         continue;
 576                 if (strncmp(value, dev->id, sizeof(value)) != 0)
 577                         continue;
 578                 strfieldcpy(udev->name, dev->name);
 579                 if (dev->mode != 0) {
 580                         udev->mode = dev->mode;
 581                         strfieldcpy(udev->owner, dev->owner);
 582                         strfieldcpy(udev->group, dev->group);
 583                 }
 584                 dbg_parse("callout returned matching value '%s', '%s' becomes '%s'"
 585                           " - owner='%s', group='%s', mode =%#o",
 586                           dev->id, class_dev->name, udev->name,
 587                           dev->owner, dev->group, dev->mode);
 588                 return 0;
 589         }
 590         return -ENODEV;
 591 }
 592
 593 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 594 {
 595         struct sysfs_attribute *tmpattr = NULL;
 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 != LABEL)
 602                         continue;
 603
 604                 dbg_parse("look for device attribute '%s'", dev->sysfs_file);
 605                 /* try to find the attribute in the class device directory */
 606                 tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
 607                 if (tmpattr)
 608                         goto label_found;
 609
 610                 /* look in the class device directory if present */
 611                 if (sysfs_device) {
 612                         tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
 613                         if (tmpattr)
 614                                 goto label_found;
 615                 }
 616
 617                 continue;
 618
 619 label_found:
 620                 tmpattr->value[strlen(tmpattr->value)-1] = 0x00;
 621                 dbg_parse("compare attribute '%s' value '%s' with '%s'",
 622                           dev->sysfs_file, tmpattr->value, dev->sysfs_value);
 623                 if (strcmp(dev->sysfs_value, tmpattr->value) != 0)
 624                         continue;
 625
 626                 strfieldcpy(udev->name, dev->name);
 627                 if (dev->mode != 0) {
 628                         udev->mode = dev->mode;
 629                         strfieldcpy(udev->owner, dev->owner);
 630                         strfieldcpy(udev->group, dev->group);
 631                 }
 632                 dbg_parse("found matching attribute '%s', '%s' becomes '%s' "
 633                           "- owner='%s', group='%s', mode=%#o",
 634                           dev->sysfs_file, class_dev->name, udev->name,
 635                           dev->owner, dev->group, dev->mode);
 636
 637                 return 0;
 638         }
 639         return -ENODEV;
 640 }
 641
 642 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 643 {
 644         struct config_device *dev;
 645         struct list_head *tmp;
 646         char path[SYSFS_PATH_MAX];
 647         int found;
 648         char *temp = NULL;
 649
 650         /* we have to have a sysfs device for NUMBER to work */
 651         if (!sysfs_device)
 652                 return -ENODEV;
 653
 654         list_for_each(tmp, &config_device_list) {
 655                 dev = list_entry(tmp, struct config_device, node);
 656                 if (dev->type != NUMBER)
 657                         continue;
 658
 659                 found = 0;
 660                 strfieldcpy(path, sysfs_device->path);
 661                 temp = strrchr(path, '/');
 662                 dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
 663                 if (strstr(temp, dev->id) != NULL) {
 664                         found = 1;
 665                 } else {
 666                         *temp = 0x00;
 667                         temp = strrchr(path, '/');
 668                         dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
 669                         if (strstr(temp, dev->id) != NULL)
 670                                 found = 1;
 671                 }
 672                 if (!found)
 673                         continue;
 674                 strfieldcpy(udev->name, dev->name);
 675                 if (dev->mode != 0) {
 676                         udev->mode = dev->mode;
 677                         strfieldcpy(udev->owner, dev->owner);
 678                         strfieldcpy(udev->group, dev->group);
 679                 }
 680                 dbg_parse("found matching id '%s', '%s' becomes '%s'"
 681                           " - owner='%s', group ='%s', mode=%#o",
 682                           dev->id, class_dev->name, udev->name,
 683                           dev->owner, dev->group, dev->mode);
 684                 return 0;
 685         }
 686         return -ENODEV;
 687 }
 688
 689
 690 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 691 {
 692         struct config_device *dev;
 693         struct list_head *tmp;
 694         char path[SYSFS_PATH_MAX];
 695         int found;
 696         char *temp = NULL;
 697
 698         /* we have to have a sysfs device for TOPOLOGY to work */
 699         if (!sysfs_device)
 700                 return -ENODEV;
 701
 702         list_for_each(tmp, &config_device_list) {
 703                 dev = list_entry(tmp, struct config_device, node);
 704                 if (dev->type != TOPOLOGY)
 705                         continue;
 706
 707                 found = 0;
 708                 strfieldcpy(path, sysfs_device->path);
 709                 temp = strrchr(path, '/');
 710                 dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
 711                 if (strstr(temp, dev->place) != NULL) {
 712                         found = 1;
 713                 } else {
 714                         *temp = 0x00;
 715                         temp = strrchr(path, '/');
 716                         dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
 717                         if (strstr(temp, dev->place) != NULL)
 718                                 found = 1;
 719                 }
 720                 if (!found)
 721                         continue;
 722
 723                 strfieldcpy(udev->name, dev->name);
 724                 if (dev->mode != 0) {
 725                         udev->mode = dev->mode;
 726                         strfieldcpy(udev->owner, dev->owner);
 727                         strfieldcpy(udev->group, dev->group);
 728                 }
 729                 dbg_parse("found matching place '%s', '%s' becomes '%s'"
 730                           " - owner='%s', group ='%s', mode=%#o",
 731                           dev->place, class_dev->name, udev->name,
 732                           dev->owner, dev->group, dev->mode);
 733                 return 0;
 734         }
 735         return -ENODEV;
 736 }
 737
 738 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev)
 739 {
 740         struct config_device *dev;
 741         struct list_head *tmp;
 742
 743         list_for_each(tmp, &config_device_list) {
 744                 dev = list_entry(tmp, struct config_device, node);
 745                 if (dev->type != REPLACE)
 746                         continue;
 747
 748                 dbg_parse("compare name '%s' with '%s'",
 749                           dev->kernel_name, dev->name);
 750                 if (strcmp(dev->kernel_name, class_dev->name) != 0)
 751                         continue;
 752
 753                 strfieldcpy(udev->name, dev->name);
 754                 if (dev->mode != 0) {
 755                         udev->mode = dev->mode;
 756                         strfieldcpy(udev->owner, dev->owner);
 757                         strfieldcpy(udev->group, dev->group);
 758                 }
 759                 dbg_parse("found name, '%s' becomes '%s' - owner='%s', group='%s', mode = %#o",
 760                           dev->kernel_name, udev->name,
 761                           dev->owner, dev->group, dev->mode);
 762
 763                 return 0;
 764         }
 765         return -ENODEV;
 766 }
 767
 768 static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
 769 {
 770         struct config_device *dev;
 771         struct list_head *tmp;
 772         int len;
 773
 774         strfieldcpy(udev->name, class_dev->name);
 775         list_for_each(tmp, &config_device_list) {
 776                 dev = list_entry(tmp, struct config_device, node);
 777                 len = strlen(dev->name);
 778                 if (dev->name[len-1] == '*') {
 779                         len--;
 780                         if (strncmp(dev->name, class_dev->name, len))
 781                                 continue;
 782                 } else {
 783                         if (strcmp(dev->name, class_dev->name))
 784                                 continue;
 785                 }
 786                 if (dev->mode != 0) {
 787                         dbg_parse("found permissions for '%s'", class_dev->name);
 788                         udev->mode = dev->mode;
 789                         strfieldcpy(udev->owner, dev->owner);
 790                         strfieldcpy(udev->group, dev->group);
 791                 }
 792         }
 793 }
 794
 795 static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
 796 {
 797         struct sysfs_device *sysfs_device = NULL;
 798         struct sysfs_class_device *class_dev_parent = NULL;
 799         int retval = 0;
 800         char *temp = NULL;
 801
 802         udev->mode = 0;
 803
 804         /* find the sysfs_device for this class device */
 805         /* Wouldn't it really be nice if libsysfs could do this for us? */
 806         if (class_dev->sysdevice) {
 807                 sysfs_device = class_dev->sysdevice;
 808         } else {
 809                 /* bah, let's go backwards up a level to see if the device is there,
 810                  * as block partitions don't point to the physical device.  Need to fix that
 811                  * up in the kernel...
 812                  */
 813                 if (strstr(class_dev->path, "block")) {
 814                         dbg_parse("looking at block device...");
 815                         if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
 816                                 char path[SYSFS_PATH_MAX];
 817
 818                                 dbg_parse("really is a partition...");
 819                                 strfieldcpy(path, class_dev->path);
 820                                 temp = strrchr(path, '/');
 821                                 *temp = 0x00;
 822                                 dbg_parse("looking for a class device at '%s'", path);
 823                                 class_dev_parent = sysfs_open_class_device(path);
 824                                 if (class_dev_parent == NULL) {
 825                                         dbg("sysfs_open_class_device at '%s' failed", path);
 826                                 } else {
 827                                         dbg_parse("class_dev_parent->name=%s", class_dev_parent->name);
 828                                         if (class_dev_parent->sysdevice)
 829                                                 sysfs_device = class_dev_parent->sysdevice;
 830                                 }
 831                         }
 832                 }
 833         }
 834
 835         if (sysfs_device) {
 836                 dbg_parse("sysfs_device->path='%s'", sysfs_device->path);
 837                 dbg_parse("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
 838         } else {
 839                 dbg_parse("class_dev->name = '%s'", class_dev->name);
 840         }
 841
 842         /* rules are looked at in priority order */
 843         retval = do_callout(class_dev, udev);
 844         if (retval == 0)
 845                 goto found;
 846
 847         retval = do_label(class_dev, udev, sysfs_device);
 848         if (retval == 0)
 849                 goto found;
 850
 851         retval = do_number(class_dev, udev, sysfs_device);
 852         if (retval == 0)
 853                 goto found;
 854
 855         retval = do_topology(class_dev, udev, sysfs_device);
 856         if (retval == 0)
 857                 goto found;
 858
 859         retval = do_replace(class_dev, udev);
 860         if (retval == 0)
 861                 goto found;
 862
 863         do_kernelname(class_dev, udev);
 864         goto done;
 865
 866 found:
 867         /* substitute placeholder in NAME  */
 868         while (1) {
 869                 char *pos = strchr(udev->name, '%');
 870                 char *dig;
 871                 char name[NAME_SIZE];
 872                 if (pos) {
 873                         strfieldcpy(name, pos+2);
 874                         *pos = 0x00;
 875                         switch (pos[1]) {
 876                         case 'b':
 877                                 if (!sysfs_device)
 878                                         break;
 879                                 strcat(udev->name, sysfs_device->bus_id);
 880                                 dbg("bus_id inserted: %s",
 881                                                 sysfs_device->bus_id);
 882                                 break;
 883                         case 'n':
 884                                 dig = class_dev->name + strlen(class_dev->name);
 885                                 while (isdigit(*(dig-1)))
 886                                         dig--;
 887                                 strcat(udev->name, dig);
 888                                 dbg("substitute kernel number '%s'", dig);
 889                                 break;
 890                         case 'm':
 891                                 sprintf(pos, "%u", udev->minor);
 892                                 dbg("substitute minor number '%u'", udev->minor);
 893                                 break;
 894                         case 'M':
 895                                 sprintf(pos, "%u", udev->major);
 896                                 dbg("substitute major number '%u'", udev->major);
 897                                 break;
 898                         default:
 899                                 dbg("unknown substitution type '%%%c'", pos[1]);
 900                                 break;
 901                         }
 902                         strcat(udev->name, name);
 903                 } else
 904                         break;
 905         }
 906
 907 done:
 908         /* mode was never set above */
 909         if (!udev->mode) {
 910                 udev->mode = get_default_mode(class_dev);
 911                 udev->owner[0] = 0x00;
 912                 udev->group[0] = 0x00;
 913         }
 914
 915         if (class_dev_parent)
 916                 sysfs_close_class_device(class_dev_parent);
 917
 918         return 0;
 919 }
 920
 921 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev)
 922 {
 923         int retval;
 924
 925         retval = get_attr(class_dev, dev);
 926         if (retval)
 927                 dbg("get_attr failed");
 928
 929         return retval;
 930 }
 931
 932 int namedev_init(void)
 933 {
 934         int retval;
 935
 936         retval = namedev_init_config();
 937         if (retval)
 938                 return retval;
 939
 940         retval = namedev_init_permissions();
 941         if (retval)
 942                 return retval;
 943
 944         dump_dev_list();
 945         return retval;
 946 }
 947
 948