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 #include "klibc_fixups.h"
  43
  44 #define TYPE_LABEL      "LABEL"
  45 #define TYPE_NUMBER     "NUMBER"
  46 #define TYPE_TOPOLOGY   "TOPOLOGY"
  47 #define TYPE_REPLACE    "REPLACE"
  48 #define TYPE_CALLOUT    "CALLOUT"
  49 #define CALLOUT_MAXARG  8
  50
  51 static LIST_HEAD(config_device_list);
  52
  53 /* s2 may end with '*' to match everything */
  54 static int strncmp_wildcard(char *s1, char *s2, int max)
  55 {
  56         int len = strlen(s2);
  57         if (len > max)
  58                 len = max;
  59         if (s2[len-1] == '*')
  60                 len--;
  61         else
  62                 len = max;
  63         return strncmp(s1, s2, len);
  64 }
  65
  66 static void dump_dev(struct config_device *dev)
  67 {
  68         switch (dev->type) {
  69         case KERNEL_NAME:
  70                 dbg_parse("KERNEL name='%s' ,"
  71                           "owner='%s', group='%s', mode=%#o",
  72                           dev->name, dev->owner, dev->group, dev->mode);
  73                 break;
  74         case LABEL:
  75                 dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s', "
  76                           "owner='%s', group='%s', mode=%#o",
  77                           dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
  78                           dev->owner, dev->group, dev->mode);
  79                 break;
  80         case NUMBER:
  81                 dbg_parse("NUMBER name='%s', bus='%s', id='%s', "
  82                           "owner='%s', group='%s', mode=%#o",
  83                           dev->name, dev->bus, dev->id,
  84                           dev->owner, dev->group, dev->mode);
  85                 break;
  86         case TOPOLOGY:
  87                 dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s', "
  88                           "owner='%s', group='%s', mode=%#o",
  89                           dev->name, dev->bus, dev->place,
  90                           dev->owner, dev->group, dev->mode);
  91                 break;
  92         case REPLACE:
  93                 dbg_parse("REPLACE name=%s, kernel_name=%s, "
  94                           "owner='%s', group='%s', mode=%#o",
  95                           dev->name, dev->kernel_name,
  96                           dev->owner, dev->group, dev->mode);
  97                 break;
  98         case CALLOUT:
  99                 dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s', "
 100                           "owner='%s', group='%s', mode=%#o",
 101                           dev->name, dev->bus, dev->exec_program, dev->id,
 102                           dev->owner, dev->group, dev->mode);
 103                 break;
 104         default:
 105                 dbg_parse("unknown type of method");
 106         }
 107 }
 108
 109 #define copy_var(a, b, var)             \
 110         if (b->var)                     \
 111                 a->var = b->var;
 112
 113 #define copy_string(a, b, var)          \
 114         if (strlen(b->var))             \
 115                 strcpy(a->var, b->var);
 116
 117 static int add_dev(struct config_device *new_dev)
 118 {
 119         struct list_head *tmp;
 120         struct config_device *tmp_dev;
 121
 122         /* update the values if we already have the device */
 123         list_for_each(tmp, &config_device_list) {
 124                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 125                 if (strncmp_wildcard(dev->name, new_dev->name, sizeof(dev->name)))
 126                         continue;
 127                 copy_var(dev, new_dev, type);
 128                 copy_var(dev, new_dev, mode);
 129                 copy_string(dev, new_dev, bus);
 130                 copy_string(dev, new_dev, sysfs_file);
 131                 copy_string(dev, new_dev, sysfs_value);
 132                 copy_string(dev, new_dev, id);
 133                 copy_string(dev, new_dev, place);
 134                 copy_string(dev, new_dev, kernel_name);
 135                 copy_string(dev, new_dev, owner);
 136                 copy_string(dev, new_dev, group);
 137                 return 0;
 138         }
 139
 140         /* not found, add new structure to the device list */
 141         tmp_dev = malloc(sizeof(*tmp_dev));
 142         if (!tmp_dev)
 143                 return -ENOMEM;
 144         memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
 145         list_add(&tmp_dev->node, &config_device_list);
 146         //dump_dev(tmp_dev);
 147         return 0;
 148 }
 149
 150 static void dump_dev_list(void)
 151 {
 152         struct list_head *tmp;
 153
 154         list_for_each(tmp, &config_device_list) {
 155                 struct config_device *dev = list_entry(tmp, struct config_device, node);
 156                 dump_dev(dev);
 157         }
 158 }
 159
 160 static int get_pair(char **orig_string, char **left, char **right)
 161 {
 162         char *temp;
 163         char *string = *orig_string;
 164
 165         if (!string)
 166                 return -ENODEV;
 167
 168         /* eat any whitespace */
 169         while (isspace(*string))
 170                 ++string;
 171
 172         /* split based on '=' */
 173         temp = strsep(&string, "=");
 174         *left = temp;
 175         if (!string)
 176                 return -ENODEV;
 177
 178         /* take the right side and strip off the '"' */
 179         while (isspace(*string))
 180                 ++string;
 181         if (*string == '"')
 182                 ++string;
 183         else
 184                 return -ENODEV;
 185
 186         temp = strsep(&string, "\"");
 187         if (!string || *temp == '\0')
 188                 return -ENODEV;
 189         *right = temp;
 190         *orig_string = string;
 191
 192         return 0;
 193 }
 194
 195 static int get_value(const char *left, char **orig_string, char **ret_string)
 196 {
 197         int retval;
 198         char *left_string;
 199
 200         retval = get_pair(orig_string, &left_string, ret_string);
 201         if (retval)
 202                 return retval;
 203         if (strcasecmp(left_string, left) != 0)
 204                 return -ENODEV;
 205         return 0;
 206 }
 207
 208 static int namedev_init_config(void)
 209 {
 210         char line[255];
 211         int lineno;
 212         char *temp;
 213         char *temp2;
 214         char *temp3;
 215         FILE *fd;
 216         int retval = 0;
 217         struct config_device dev;
 218
 219         dbg("opening '%s' to read as config", udev_config_filename);
 220         fd = fopen(udev_config_filename, "r");
 221         if (fd == NULL) {
 222                 dbg("can't open '%s'", udev_config_filename);
 223                 return -ENODEV;
 224         }
 225
 226         /* loop through the whole file */
 227         lineno = 0;
 228         while (1) {
 229                 /* get a line */
 230                 temp = fgets(line, sizeof(line), fd);
 231                 if (temp == NULL)
 232                         goto exit;
 233                 lineno++;
 234
 235                 dbg_parse("read '%s'", temp);
 236
 237                 /* eat the whitespace at the beginning of the line */
 238                 while (isspace(*temp))
 239                         ++temp;
 240
 241                 /* empty line? */
 242                 if (*temp == 0x00)
 243                         continue;
 244
 245                 /* see if this is a comment */
 246                 if (*temp == COMMENT_CHARACTER)
 247                         continue;
 248
 249                 memset(&dev, 0x00, sizeof(struct config_device));
 250
 251                 /* parse the line */
 252                 temp2 = strsep(&temp, ",");
 253                 if (strcasecmp(temp2, TYPE_LABEL) == 0) {
 254                         /* label type */
 255                         dev.type = LABEL;
 256
 257                         /* BUS="bus" */
 258                         retval = get_value("BUS", &temp, &temp3);
 259                         if (retval)
 260                                 break;
 261                         strfieldcpy(dev.bus, temp3);
 262
 263                         /* file="value" */
 264                         temp2 = strsep(&temp, ",");
 265                         retval = get_pair(&temp, &temp2, &temp3);
 266                         if (retval)
 267                                 break;
 268                         strfieldcpy(dev.sysfs_file, temp2);
 269                         strfieldcpy(dev.sysfs_value, temp3);
 270
 271                         /* NAME="new_name" */
 272                         temp2 = strsep(&temp, ",");
 273                         retval = get_value("NAME", &temp, &temp3);
 274                         if (retval)
 275                                 break;
 276                         strfieldcpy(dev.name, temp3);
 277
 278                         dbg_parse("LABEL name='%s', bus='%s', "
 279                                   "sysfs_file='%s', sysfs_value='%s'",
 280                                   dev.name, dev.bus, dev.sysfs_file,
 281                                   dev.sysfs_value);
 282                 }
 283
 284                 if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
 285                         /* number type */
 286                         dev.type = NUMBER;
 287
 288                         /* BUS="bus" */
 289                         retval = get_value("BUS", &temp, &temp3);
 290                         if (retval)
 291                                 break;
 292                         strfieldcpy(dev.bus, temp3);
 293
 294                         /* ID="id" */
 295                         temp2 = strsep(&temp, ",");
 296                         retval = get_value("ID", &temp, &temp3);
 297                         if (retval)
 298                                 break;
 299                         strfieldcpy(dev.id, temp3);
 300
 301                         /* NAME="new_name" */
 302                         temp2 = strsep(&temp, ",");
 303                         retval = get_value("NAME", &temp, &temp3);
 304                         if (retval)
 305                                 break;
 306                         strfieldcpy(dev.name, temp3);
 307
 308                         dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
 309                                   dev.name, dev.bus, dev.id);
 310                 }
 311
 312                 if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
 313                         /* number type */
 314                         dev.type = TOPOLOGY;
 315
 316                         /* BUS="bus" */
 317                         retval = get_value("BUS", &temp, &temp3);
 318                         if (retval)
 319                                 break;
 320                         strfieldcpy(dev.bus, temp3);
 321
 322                         /* PLACE="place" */
 323                         temp2 = strsep(&temp, ",");
 324                         retval = get_value("PLACE", &temp, &temp3);
 325                         if (retval)
 326                                 break;
 327                         strfieldcpy(dev.place, temp3);
 328
 329                         /* NAME="new_name" */
 330                         temp2 = strsep(&temp, ",");
 331                         retval = get_value("NAME", &temp, &temp3);
 332                         if (retval)
 333                                 break;
 334                         strfieldcpy(dev.name, temp3);
 335
 336                         dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
 337                                   dev.name, dev.bus, dev.place);
 338                 }
 339
 340                 if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
 341                         /* number type */
 342                         dev.type = REPLACE;
 343
 344                         /* KERNEL="kernel_name" */
 345                         retval = get_value("KERNEL", &temp, &temp3);
 346                         if (retval)
 347                                 break;
 348                         strfieldcpy(dev.kernel_name, temp3);
 349
 350                         /* NAME="new_name" */
 351                         temp2 = strsep(&temp, ",");
 352                         retval = get_value("NAME", &temp, &temp3);
 353                         if (retval)
 354                                 break;
 355                         strfieldcpy(dev.name, temp3);
 356                         dbg_parse("REPLACE name='%s', kernel_name='%s'",
 357                                   dev.name, dev.kernel_name);
 358                 }
 359                 if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
 360                         /* number type */
 361                         dev.type = CALLOUT;
 362
 363                         /* BUS="bus" */
 364                         retval = get_value("BUS", &temp, &temp3);
 365                         if (retval)
 366                                 break;
 367                         strfieldcpy(dev.bus, temp3);
 368
 369                         /* PROGRAM="executable" */
 370                         temp2 = strsep(&temp, ",");
 371                         retval = get_value("PROGRAM", &temp, &temp3);
 372                         if (retval)
 373                                 break;
 374                         strfieldcpy(dev.exec_program, temp3);
 375
 376                         /* ID="id" */
 377                         temp2 = strsep(&temp, ",");
 378                         retval = get_value("ID", &temp, &temp3);
 379                         if (retval)
 380                                 break;
 381                         strfieldcpy(dev.id, temp3);
 382
 383                         /* NAME="new_name" */
 384                         temp2 = strsep(&temp, ",");
 385                         retval = get_value("NAME", &temp, &temp3);
 386                         if (retval)
 387                                 break;
 388                         strfieldcpy(dev.name, temp3);
 389                         dbg_parse("CALLOUT name='%s', program='%s'",
 390                                   dev.name, dev.exec_program);
 391                 }
 392
 393                 retval = add_dev(&dev);
 394                 if (retval) {
 395                         dbg("add_dev returned with error %d", retval);
 396                         goto exit;
 397                 }
 398         }
 399         dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
 400                   lineno, temp - line, temp);
 401 exit:
 402         fclose(fd);
 403         return retval;
 404 }
 405
 406
 407 static int namedev_init_permissions(void)
 408 {
 409         char line[255];
 410         char *temp;
 411         char *temp2;
 412         FILE *fd;
 413         int retval = 0;
 414         struct config_device dev;
 415
 416         dbg("opening '%s' to read as permissions config", udev_config_permission_filename);
 417         fd = fopen(udev_config_permission_filename, "r");
 418         if (fd == NULL) {
 419                 dbg("can't open '%s'", udev_config_permission_filename);
 420                 return -ENODEV;
 421         }
 422
 423         /* loop through the whole file */
 424         while (1) {
 425                 temp = fgets(line, sizeof(line), fd);
 426                 if (temp == NULL)
 427                         break;
 428
 429                 dbg_parse("read '%s'", temp);
 430
 431                 /* eat the whitespace at the beginning of the line */
 432                 while (isspace(*temp))
 433                         ++temp;
 434
 435                 /* empty line? */
 436                 if (*temp == 0x00)
 437                         continue;
 438
 439                 /* see if this is a comment */
 440                 if (*temp == COMMENT_CHARACTER)
 441                         continue;
 442
 443                 memset(&dev, 0x00, sizeof(dev));
 444
 445                 /* parse the line */
 446                 temp2 = strsep(&temp, ":");
 447                 if (!temp2) {
 448                         dbg("cannot parse line '%s'", line);
 449                         continue;
 450                 }
 451                 strncpy(dev.name, temp2, sizeof(dev.name));
 452
 453                 temp2 = strsep(&temp, ":");
 454                 if (!temp2) {
 455                         dbg("cannot parse line '%s'", line);
 456                         continue;
 457                 }
 458                 strncpy(dev.owner, temp2, sizeof(dev.owner));
 459
 460                 temp2 = strsep(&temp, ":");
 461                 if (!temp2) {
 462                         dbg("cannot parse line '%s'", line);
 463                         continue;
 464                 }
 465                 strncpy(dev.group, temp2, sizeof(dev.owner));
 466
 467                 if (!temp) {
 468                         dbg("cannot parse line: %s", line);
 469                         continue;
 470                 }
 471                 dev.mode = strtol(temp, NULL, 8);
 472
 473                 dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
 474                           dev.name, dev.owner, dev.group,
 475                           dev.mode);
 476                 retval = add_dev(&dev);
 477                 if (retval) {
 478                         dbg("add_dev returned with error %d", retval);
 479                         goto exit;
 480                 }
 481         }
 482
 483 exit:
 484         fclose(fd);
 485         return retval;
 486 }
 487
 488 static mode_t get_default_mode(struct sysfs_class_device *class_dev)
 489 {
 490         /* just default everyone to rw for the world! */
 491         return 0666;
 492 }
 493
 494 static void build_kernel_number(struct sysfs_class_device *class_dev, struct udevice *udev)
 495 {
 496         char *dig;
 497
 498         /* FIXME, figure out how to handle stuff like sdaj which will not work right now. */
 499         dig = class_dev->name + strlen(class_dev->name);
 500         while (isdigit(*(dig-1)))
 501                 dig--;
 502         strfieldcpy(udev->kernel_number, dig);
 503         dbg("kernel_number='%s'", udev->kernel_number);
 504 }
 505
 506 static void apply_format(struct udevice *udev, unsigned char *string)
 507 {
 508         char name[NAME_SIZE];
 509         char *pos;
 510
 511         while (1) {
 512                 pos = strchr(string, '%');
 513
 514                 if (pos) {
 515                         strfieldcpy(name, pos+2);
 516                         *pos = 0x00;
 517                         switch (pos[1]) {
 518                         case 'b':
 519                                 if (strlen(udev->bus_id) == 0)
 520                                         break;
 521                                 strcat(pos, udev->bus_id);
 522                                 dbg("substitute bus_id '%s'", udev->bus_id);
 523                                 break;
 524                         case 'n':
 525                                 if (strlen(udev->kernel_number) == 0)
 526                                         break;
 527                                 strcat(pos, udev->kernel_number);
 528                                 dbg("substitute kernel number '%s'", udev->kernel_number);
 529                                 break;
 530                         case 'D':
 531                                 if (strlen(udev->kernel_number) == 0) {
 532                                         strcat(pos, "disk");
 533                                         break;
 534                                 }
 535                                 strcat(pos, "part");
 536                                 strcat(pos, udev->kernel_number);
 537                                 dbg("substitute kernel number '%s'", udev->kernel_number);
 538                                 break;
 539                         case 'm':
 540                                 sprintf(pos, "%u", udev->minor);
 541                                 dbg("substitute minor number '%u'", udev->minor);
 542                                 break;
 543                         case 'M':
 544                                 sprintf(pos, "%u", udev->major);
 545                                 dbg("substitute major number '%u'", udev->major);
 546                                 break;
 547                         case 'c':
 548                                 if (strlen(udev->callout_value) == 0)
 549                                         break;
 550                                 strcat(pos, udev->callout_value);
 551                                 dbg("substitute callout output '%s'", udev->callout_value);
 552                                 break;
 553                         default:
 554                                 dbg("unknown substitution type '%%%c'", pos[1]);
 555                                 break;
 556                         }
 557                         strcat(string, name);
 558                 } else
 559                         break;
 560         }
 561 }
 562
 563
 564 static int exec_callout(struct config_device *dev, char *value, int len)
 565 {
 566         int retval;
 567         int res;
 568         int status;
 569         int fds[2];
 570         pid_t pid;
 571         int value_set = 0;
 572         char buffer[256];
 573         char *arg;
 574         char *args[CALLOUT_MAXARG];
 575         int i;
 576
 577         dbg("callout to '%s'", dev->exec_program);
 578         retval = pipe(fds);
 579         if (retval != 0) {
 580                 dbg("pipe failed");
 581                 return -1;
 582         }
 583         pid = fork();
 584         if (pid == -1) {
 585                 dbg("fork failed");
 586                 return -1;
 587         }
 588
 589         if (pid == 0) {
 590                 /* child */
 591                 close(STDOUT_FILENO);
 592                 dup(fds[1]);    /* dup write side of pipe to STDOUT */
 593                 if (strchr(dev->exec_program, ' ')) {
 594                         /* callout with arguments */
 595                         arg = dev->exec_program;
 596                         for (i=0; i < CALLOUT_MAXARG-1; i++) {
 597                                 args[i] = strsep(&arg, " ");
 598                                 if (args[i] == NULL)
 599                                         break;
 600                         }
 601                         if (args[i]) {
 602                                 dbg("too many args - %d", i);
 603                                 args[i] = NULL;
 604                         }
 605                         retval = execve(args[0], args, main_envp);
 606                 } else {
 607                         retval = execve(dev->exec_program, main_argv, main_envp);
 608                 }
 609                 if (retval != 0) {
 610                         dbg("child execve failed");
 611                         exit(1);
 612                 }
 613                 return -1; /* avoid compiler warning */
 614         } else {
 615                 /* parent reads from fds[0] */
 616                 close(fds[1]);
 617                 retval = 0;
 618                 while (1) {
 619                         res = read(fds[0], buffer, sizeof(buffer) - 1);
 620                         if (res <= 0)
 621                                 break;
 622                         buffer[res] = '\0';
 623                         if (res > len) {
 624                                 dbg("callout len %d too short", len);
 625                                 retval = -1;
 626                         }
 627                         if (value_set) {
 628                                 dbg("callout value already set");
 629                                 retval = -1;
 630                         } else {
 631                                 value_set = 1;
 632                                 strncpy(value, buffer, len);
 633                         }
 634                 }
 635                 dbg("callout returned '%s'", value);
 636                 close(fds[0]);
 637                 res = wait(&status);
 638                 if (res < 0) {
 639                         dbg("wait failed result %d", res);
 640                         retval = -1;
 641                 }
 642
 643 #ifndef __KLIBC__
 644                 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 645                         dbg("callout program status 0x%x", status);
 646                         retval = -1;
 647                 }
 648 #endif
 649         }
 650         return retval;
 651 }
 652
 653 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev)
 654 {
 655         struct config_device *dev;
 656         struct list_head *tmp;
 657
 658         list_for_each(tmp, &config_device_list) {
 659                 dev = list_entry(tmp, struct config_device, node);
 660                 if (dev->type != CALLOUT)
 661                         continue;
 662
 663                 /* substitute anything that needs to be in the program name */
 664                 apply_format(udev, dev->exec_program);
 665                 if (exec_callout(dev, udev->callout_value, NAME_SIZE))
 666                         continue;
 667                 if (strncmp_wildcard(udev->callout_value, dev->id, NAME_SIZE) != 0)
 668                         continue;
 669                 strfieldcpy(udev->name, dev->name);
 670                 if (dev->mode != 0) {
 671                         udev->mode = dev->mode;
 672                         strfieldcpy(udev->owner, dev->owner);
 673                         strfieldcpy(udev->group, dev->group);
 674                 }
 675                 dbg_parse("callout returned matching value '%s', '%s' becomes '%s'"
 676                           " - owner='%s', group='%s', mode=%#o",
 677                           dev->id, class_dev->name, udev->name,
 678                           dev->owner, dev->group, dev->mode);
 679                 return 0;
 680         }
 681         return -ENODEV;
 682 }
 683
 684 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 685 {
 686         struct sysfs_attribute *tmpattr = NULL;
 687         struct config_device *dev;
 688         struct list_head *tmp;
 689
 690         list_for_each(tmp, &config_device_list) {
 691                 dev = list_entry(tmp, struct config_device, node);
 692                 if (dev->type != LABEL)
 693                         continue;
 694
 695                 dbg_parse("look for device attribute '%s'", dev->sysfs_file);
 696                 /* try to find the attribute in the class device directory */
 697                 tmpattr = sysfs_get_classdev_attr(class_dev, dev->sysfs_file);
 698                 if (tmpattr)
 699                         goto label_found;
 700
 701                 /* look in the class device directory if present */
 702                 if (sysfs_device) {
 703                         tmpattr = sysfs_get_device_attr(sysfs_device, dev->sysfs_file);
 704                         if (tmpattr)
 705                                 goto label_found;
 706                 }
 707
 708                 continue;
 709
 710 label_found:
 711                 tmpattr->value[strlen(tmpattr->value)-1] = 0x00;
 712                 dbg_parse("compare attribute '%s' value '%s' with '%s'",
 713                           dev->sysfs_file, tmpattr->value, dev->sysfs_value);
 714                 if (strcmp(dev->sysfs_value, tmpattr->value) != 0)
 715                         continue;
 716
 717                 strfieldcpy(udev->name, dev->name);
 718                 if (dev->mode != 0) {
 719                         udev->mode = dev->mode;
 720                         strfieldcpy(udev->owner, dev->owner);
 721                         strfieldcpy(udev->group, dev->group);
 722                 }
 723                 dbg_parse("found matching attribute '%s', '%s' becomes '%s' "
 724                           "- owner='%s', group='%s', mode=%#o",
 725                           dev->sysfs_file, class_dev->name, udev->name,
 726                           dev->owner, dev->group, dev->mode);
 727
 728                 return 0;
 729         }
 730         return -ENODEV;
 731 }
 732
 733 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 734 {
 735         struct config_device *dev;
 736         struct list_head *tmp;
 737         char path[SYSFS_PATH_MAX];
 738         int found;
 739         char *temp = NULL;
 740
 741         /* we have to have a sysfs device for NUMBER to work */
 742         if (!sysfs_device)
 743                 return -ENODEV;
 744
 745         list_for_each(tmp, &config_device_list) {
 746                 dev = list_entry(tmp, struct config_device, node);
 747                 if (dev->type != NUMBER)
 748                         continue;
 749
 750                 found = 0;
 751                 strfieldcpy(path, sysfs_device->path);
 752                 temp = strrchr(path, '/');
 753                 dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
 754                 if (strstr(temp, dev->id) != NULL) {
 755                         found = 1;
 756                 } else {
 757                         *temp = 0x00;
 758                         temp = strrchr(path, '/');
 759                         dbg_parse("search '%s' in '%s', path='%s'", dev->id, temp, path);
 760                         if (strstr(temp, dev->id) != NULL)
 761                                 found = 1;
 762                 }
 763                 if (!found)
 764                         continue;
 765                 strfieldcpy(udev->name, dev->name);
 766                 if (dev->mode != 0) {
 767                         udev->mode = dev->mode;
 768                         strfieldcpy(udev->owner, dev->owner);
 769                         strfieldcpy(udev->group, dev->group);
 770                 }
 771                 dbg_parse("found matching id '%s', '%s' becomes '%s'"
 772                           " - owner='%s', group ='%s', mode=%#o",
 773                           dev->id, class_dev->name, udev->name,
 774                           dev->owner, dev->group, dev->mode);
 775                 return 0;
 776         }
 777         return -ENODEV;
 778 }
 779
 780
 781 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 782 {
 783         struct config_device *dev;
 784         struct list_head *tmp;
 785         char path[SYSFS_PATH_MAX];
 786         int found;
 787         char *temp = NULL;
 788
 789         /* we have to have a sysfs device for TOPOLOGY to work */
 790         if (!sysfs_device)
 791                 return -ENODEV;
 792
 793         list_for_each(tmp, &config_device_list) {
 794                 dev = list_entry(tmp, struct config_device, node);
 795                 if (dev->type != TOPOLOGY)
 796                         continue;
 797
 798                 found = 0;
 799                 strfieldcpy(path, sysfs_device->path);
 800                 temp = strrchr(path, '/');
 801                 dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
 802                 if (strstr(temp, dev->place) != NULL) {
 803                         found = 1;
 804                 } else {
 805                         *temp = 0x00;
 806                         temp = strrchr(path, '/');
 807                         dbg_parse("search '%s' in '%s', path='%s'", dev->place, temp, path);
 808                         if (strstr(temp, dev->place) != NULL)
 809                                 found = 1;
 810                 }
 811                 if (!found)
 812                         continue;
 813
 814                 strfieldcpy(udev->name, dev->name);
 815                 if (dev->mode != 0) {
 816                         udev->mode = dev->mode;
 817                         strfieldcpy(udev->owner, dev->owner);
 818                         strfieldcpy(udev->group, dev->group);
 819                 }
 820                 dbg_parse("found matching place '%s', '%s' becomes '%s'"
 821                           " - owner='%s', group ='%s', mode=%#o",
 822                           dev->place, class_dev->name, udev->name,
 823                           dev->owner, dev->group, dev->mode);
 824                 return 0;
 825         }
 826         return -ENODEV;
 827 }
 828
 829 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev)
 830 {
 831         struct config_device *dev;
 832         struct list_head *tmp;
 833
 834         list_for_each(tmp, &config_device_list) {
 835                 dev = list_entry(tmp, struct config_device, node);
 836                 if (dev->type != REPLACE)
 837                         continue;
 838
 839                 dbg_parse("compare name '%s' with '%s'",
 840                           dev->kernel_name, dev->name);
 841                 if (strcmp(dev->kernel_name, class_dev->name) != 0)
 842                         continue;
 843
 844                 strfieldcpy(udev->name, dev->name);
 845                 if (dev->mode != 0) {
 846                         udev->mode = dev->mode;
 847                         strfieldcpy(udev->owner, dev->owner);
 848                         strfieldcpy(udev->group, dev->group);
 849                 }
 850                 dbg_parse("found name, '%s' becomes '%s' - owner='%s', group='%s', mode = %#o",
 851                           dev->kernel_name, udev->name,
 852                           dev->owner, dev->group, dev->mode);
 853
 854                 return 0;
 855         }
 856         return -ENODEV;
 857 }
 858
 859 static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
 860 {
 861         struct config_device *dev;
 862         struct list_head *tmp;
 863         int len;
 864
 865         strfieldcpy(udev->name, class_dev->name);
 866         /* look for permissions */
 867         list_for_each(tmp, &config_device_list) {
 868                 dev = list_entry(tmp, struct config_device, node);
 869                 len = strlen(dev->name);
 870                 if (strncmp_wildcard(class_dev->name, dev->name, sizeof(dev->name)))
 871                         continue;
 872                 if (dev->mode != 0) {
 873                         dbg_parse("found permissions for '%s'", class_dev->name);
 874                         udev->mode = dev->mode;
 875                         strfieldcpy(udev->owner, dev->owner);
 876                         strfieldcpy(udev->group, dev->group);
 877                 }
 878         }
 879 }
 880
 881 static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
 882 {
 883         struct sysfs_device *sysfs_device = NULL;
 884         struct sysfs_class_device *class_dev_parent = NULL;
 885         int retval = 0;
 886         char *temp = NULL;
 887
 888         udev->mode = 0;
 889
 890         /* find the sysfs_device for this class device */
 891         /* Wouldn't it really be nice if libsysfs could do this for us? */
 892         if (class_dev->sysdevice) {
 893                 sysfs_device = class_dev->sysdevice;
 894         } else {
 895                 /* bah, let's go backwards up a level to see if the device is there,
 896                  * as block partitions don't point to the physical device.  Need to fix that
 897                  * up in the kernel...
 898                  */
 899                 if (strstr(class_dev->path, "block")) {
 900                         dbg_parse("looking at block device");
 901                         if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
 902                                 char path[SYSFS_PATH_MAX];
 903
 904                                 dbg_parse("really is a partition");
 905                                 strfieldcpy(path, class_dev->path);
 906                                 temp = strrchr(path, '/');
 907                                 *temp = 0x00;
 908                                 dbg_parse("looking for a class device at '%s'", path);
 909                                 class_dev_parent = sysfs_open_class_device(path);
 910                                 if (class_dev_parent == NULL) {
 911                                         dbg("sysfs_open_class_device at '%s' failed", path);
 912                                 } else {
 913                                         dbg_parse("class_dev_parent->name='%s'", class_dev_parent->name);
 914                                         if (class_dev_parent->sysdevice)
 915                                                 sysfs_device = class_dev_parent->sysdevice;
 916                                 }
 917                         }
 918                 }
 919         }
 920
 921         if (sysfs_device) {
 922                 dbg_parse("sysfs_device->path='%s'", sysfs_device->path);
 923                 dbg_parse("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
 924                 strfieldcpy(udev->bus_id, sysfs_device->bus_id);
 925         } else {
 926                 dbg_parse("class_dev->name = '%s'", class_dev->name);
 927         }
 928
 929         build_kernel_number(class_dev, udev);
 930
 931         /* rules are looked at in priority order */
 932         retval = do_callout(class_dev, udev);
 933         if (retval == 0)
 934                 goto found;
 935
 936         retval = do_label(class_dev, udev, sysfs_device);
 937         if (retval == 0)
 938                 goto found;
 939
 940         retval = do_number(class_dev, udev, sysfs_device);
 941         if (retval == 0)
 942                 goto found;
 943
 944         retval = do_topology(class_dev, udev, sysfs_device);
 945         if (retval == 0)
 946                 goto found;
 947
 948         retval = do_replace(class_dev, udev);
 949         if (retval == 0)
 950                 goto found;
 951
 952         do_kernelname(class_dev, udev);
 953         goto done;
 954
 955 found:
 956         /* substitute placeholder in NAME  */
 957         apply_format(udev, udev->name);
 958
 959 done:
 960         /* mode was never set above */
 961         if (!udev->mode) {
 962                 udev->mode = get_default_mode(class_dev);
 963                 udev->owner[0] = 0x00;
 964                 udev->group[0] = 0x00;
 965         }
 966
 967         if (class_dev_parent)
 968                 sysfs_close_class_device(class_dev_parent);
 969
 970         return 0;
 971 }
 972
 973 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev)
 974 {
 975         int retval;
 976
 977         retval = get_attr(class_dev, dev);
 978         if (retval)
 979                 dbg("get_attr failed");
 980
 981         return retval;
 982 }
 983
 984 int namedev_init(void)
 985 {
 986         int retval;
 987
 988         retval = namedev_init_config();
 989         if (retval)
 990                 return retval;
 991
 992         retval = namedev_init_permissions();
 993         if (retval)
 994                 return retval;
 995
 996         dump_dev_list();
 997         return retval;
 998 }