security/tomoyo/file.c

   1 /*
   2  * security/tomoyo/file.c
   3  *
   4  * Pathname restriction functions.
   5  *
   6  * Copyright (C) 2005-2010  NTT DATA CORPORATION
   7  */
   8
   9 #include "common.h"
  10 #include <linux/slab.h>
  11
  12 /* Keyword array for operations with one pathname. */
  13 const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
  14         [TOMOYO_TYPE_READ_WRITE] = "read/write",
  15         [TOMOYO_TYPE_EXECUTE]    = "execute",
  16         [TOMOYO_TYPE_READ]       = "read",
  17         [TOMOYO_TYPE_WRITE]      = "write",
  18         [TOMOYO_TYPE_UNLINK]     = "unlink",
  19         [TOMOYO_TYPE_RMDIR]      = "rmdir",
  20         [TOMOYO_TYPE_TRUNCATE]   = "truncate",
  21         [TOMOYO_TYPE_SYMLINK]    = "symlink",
  22         [TOMOYO_TYPE_REWRITE]    = "rewrite",
  23         [TOMOYO_TYPE_CHROOT]     = "chroot",
  24         [TOMOYO_TYPE_UMOUNT]     = "unmount",
  25 };
  26
  27 /* Keyword array for operations with one pathname and three numbers. */
  28 const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION] = {
  29         [TOMOYO_TYPE_MKBLOCK]    = "mkblock",
  30         [TOMOYO_TYPE_MKCHAR]     = "mkchar",
  31 };
  32
  33 /* Keyword array for operations with two pathnames. */
  34 const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = {
  35         [TOMOYO_TYPE_LINK]       = "link",
  36         [TOMOYO_TYPE_RENAME]     = "rename",
  37         [TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root",
  38 };
  39
  40 /* Keyword array for operations with one pathname and one number. */
  41 const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
  42         [TOMOYO_TYPE_CREATE]     = "create",
  43         [TOMOYO_TYPE_MKDIR]      = "mkdir",
  44         [TOMOYO_TYPE_MKFIFO]     = "mkfifo",
  45         [TOMOYO_TYPE_MKSOCK]     = "mksock",
  46         [TOMOYO_TYPE_IOCTL]      = "ioctl",
  47         [TOMOYO_TYPE_CHMOD]      = "chmod",
  48         [TOMOYO_TYPE_CHOWN]      = "chown",
  49         [TOMOYO_TYPE_CHGRP]      = "chgrp",
  50 };
  51
  52 static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = {
  53         [TOMOYO_TYPE_READ_WRITE] = TOMOYO_MAC_FILE_OPEN,
  54         [TOMOYO_TYPE_EXECUTE]    = TOMOYO_MAC_FILE_EXECUTE,
  55         [TOMOYO_TYPE_READ]       = TOMOYO_MAC_FILE_OPEN,
  56         [TOMOYO_TYPE_WRITE]      = TOMOYO_MAC_FILE_OPEN,
  57         [TOMOYO_TYPE_UNLINK]     = TOMOYO_MAC_FILE_UNLINK,
  58         [TOMOYO_TYPE_RMDIR]      = TOMOYO_MAC_FILE_RMDIR,
  59         [TOMOYO_TYPE_TRUNCATE]   = TOMOYO_MAC_FILE_TRUNCATE,
  60         [TOMOYO_TYPE_SYMLINK]    = TOMOYO_MAC_FILE_SYMLINK,
  61         [TOMOYO_TYPE_REWRITE]    = TOMOYO_MAC_FILE_REWRITE,
  62         [TOMOYO_TYPE_CHROOT]     = TOMOYO_MAC_FILE_CHROOT,
  63         [TOMOYO_TYPE_UMOUNT]     = TOMOYO_MAC_FILE_UMOUNT,
  64 };
  65
  66 static const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = {
  67         [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK,
  68         [TOMOYO_TYPE_MKCHAR]  = TOMOYO_MAC_FILE_MKCHAR,
  69 };
  70
  71 static const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = {
  72         [TOMOYO_TYPE_LINK]       = TOMOYO_MAC_FILE_LINK,
  73         [TOMOYO_TYPE_RENAME]     = TOMOYO_MAC_FILE_RENAME,
  74         [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT,
  75 };
  76
  77 static const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
  78         [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE,
  79         [TOMOYO_TYPE_MKDIR]  = TOMOYO_MAC_FILE_MKDIR,
  80         [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO,
  81         [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK,
  82         [TOMOYO_TYPE_IOCTL]  = TOMOYO_MAC_FILE_IOCTL,
  83         [TOMOYO_TYPE_CHMOD]  = TOMOYO_MAC_FILE_CHMOD,
  84         [TOMOYO_TYPE_CHOWN]  = TOMOYO_MAC_FILE_CHOWN,
  85         [TOMOYO_TYPE_CHGRP]  = TOMOYO_MAC_FILE_CHGRP,
  86 };
  87
  88 void tomoyo_put_name_union(struct tomoyo_name_union *ptr)
  89 {
  90         if (!ptr)
  91                 return;
  92         if (ptr->is_group)
  93                 tomoyo_put_group(ptr->group);
  94         else
  95                 tomoyo_put_name(ptr->filename);
  96 }
  97
  98 bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
  99                                const struct tomoyo_name_union *ptr)
 100 {
 101         if (ptr->is_group)
 102                 return tomoyo_path_matches_group(name, ptr->group);
 103         return tomoyo_path_matches_pattern(name, ptr->filename);
 104 }
 105
 106 void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
 107 {
 108         if (ptr && ptr->is_group)
 109                 tomoyo_put_group(ptr->group);
 110 }
 111
 112 bool tomoyo_compare_number_union(const unsigned long value,
 113                                  const struct tomoyo_number_union *ptr)
 114 {
 115         if (ptr->is_group)
 116                 return tomoyo_number_matches_group(value, value, ptr->group);
 117         return value >= ptr->values[0] && value <= ptr->values[1];
 118 }
 119
 120 static void tomoyo_add_slash(struct tomoyo_path_info *buf)
 121 {
 122         if (buf->is_dir)
 123                 return;
 124         /*
 125          * This is OK because tomoyo_encode() reserves space for appending "/".
 126          */
 127         strcat((char *) buf->name, "/");
 128         tomoyo_fill_path_info(buf);
 129 }
 130
 131 /**
 132  * tomoyo_strendswith - Check whether the token ends with the given token.
 133  *
 134  * @name: The token to check.
 135  * @tail: The token to find.
 136  *
 137  * Returns true if @name ends with @tail, false otherwise.
 138  */
 139 static bool tomoyo_strendswith(const char *name, const char *tail)
 140 {
 141         int len;
 142
 143         if (!name || !tail)
 144                 return false;
 145         len = strlen(name) - strlen(tail);
 146         return len >= 0 && !strcmp(name + len, tail);
 147 }
 148
 149 /**
 150  * tomoyo_get_realpath - Get realpath.
 151  *
 152  * @buf:  Pointer to "struct tomoyo_path_info".
 153  * @path: Pointer to "struct path".
 154  *
 155  * Returns true on success, false otherwise.
 156  */
 157 static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
 158 {
 159         buf->name = tomoyo_realpath_from_path(path);
 160         if (buf->name) {
 161                 tomoyo_fill_path_info(buf);
 162                 return true;
 163         }
 164         return false;
 165 }
 166
 167 /**
 168  * tomoyo_audit_path_log - Audit path request log.
 169  *
 170  * @r: Pointer to "struct tomoyo_request_info".
 171  *
 172  * Returns 0 on success, negative value otherwise.
 173  */
 174 static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
 175 {
 176         const char *operation = tomoyo_path_keyword[r->param.path.operation];
 177         const struct tomoyo_path_info *filename = r->param.path.filename;
 178         if (r->granted)
 179                 return 0;
 180         tomoyo_warn_log(r, "%s %s", operation, filename->name);
 181         return tomoyo_supervisor(r, "allow_%s %s\n", operation,
 182                                  tomoyo_file_pattern(filename));
 183 }
 184
 185 /**
 186  * tomoyo_audit_path2_log - Audit path/path request log.
 187  *
 188  * @r: Pointer to "struct tomoyo_request_info".
 189  *
 190  * Returns 0 on success, negative value otherwise.
 191  */
 192 static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
 193 {
 194         const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
 195         const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
 196         const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
 197         if (r->granted)
 198                 return 0;
 199         tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
 200                         filename2->name);
 201         return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
 202                                  tomoyo_file_pattern(filename1),
 203                                  tomoyo_file_pattern(filename2));
 204 }
 205
 206 /**
 207  * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
 208  *
 209  * @r: Pointer to "struct tomoyo_request_info".
 210  *
 211  * Returns 0 on success, negative value otherwise.
 212  */
 213 static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
 214 {
 215         const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
 216         const struct tomoyo_path_info *filename = r->param.mkdev.filename;
 217         const unsigned int major = r->param.mkdev.major;
 218         const unsigned int minor = r->param.mkdev.minor;
 219         const unsigned int mode = r->param.mkdev.mode;
 220         if (r->granted)
 221                 return 0;
 222         tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
 223                         major, minor);
 224         return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation,
 225                                  tomoyo_file_pattern(filename), mode, major,
 226                                  minor);
 227 }
 228
 229 /**
 230  * tomoyo_audit_path_number_log - Audit path/number request log.
 231  *
 232  * @r:     Pointer to "struct tomoyo_request_info".
 233  * @error: Error code.
 234  *
 235  * Returns 0 on success, negative value otherwise.
 236  */
 237 static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
 238 {
 239         const u8 type = r->param.path_number.operation;
 240         u8 radix;
 241         const struct tomoyo_path_info *filename = r->param.path_number.filename;
 242         const char *operation = tomoyo_path_number_keyword[type];
 243         char buffer[64];
 244         if (r->granted)
 245                 return 0;
 246         switch (type) {
 247         case TOMOYO_TYPE_CREATE:
 248         case TOMOYO_TYPE_MKDIR:
 249         case TOMOYO_TYPE_MKFIFO:
 250         case TOMOYO_TYPE_MKSOCK:
 251         case TOMOYO_TYPE_CHMOD:
 252                 radix = TOMOYO_VALUE_TYPE_OCTAL;
 253                 break;
 254         case TOMOYO_TYPE_IOCTL:
 255                 radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
 256                 break;
 257         default:
 258                 radix = TOMOYO_VALUE_TYPE_DECIMAL;
 259                 break;
 260         }
 261         tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
 262                            radix);
 263         tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
 264         return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
 265                                  tomoyo_file_pattern(filename), buffer);
 266 }
 267
 268 static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a,
 269                                           const struct tomoyo_acl_head *b)
 270 {
 271         return container_of(a, struct tomoyo_globally_readable_file_entry,
 272                             head)->filename ==
 273                 container_of(b, struct tomoyo_globally_readable_file_entry,
 274                              head)->filename;
 275 }
 276
 277 /**
 278  * tomoyo_update_globally_readable_entry - Update "struct tomoyo_globally_readable_file_entry" list.
 279  *
 280  * @filename:  Filename unconditionally permitted to open() for reading.
 281  * @is_delete: True if it is a delete request.
 282  *
 283  * Returns 0 on success, negative value otherwise.
 284  *
 285  * Caller holds tomoyo_read_lock().
 286  */
 287 static int tomoyo_update_globally_readable_entry(const char *filename,
 288                                                  const bool is_delete)
 289 {
 290         struct tomoyo_globally_readable_file_entry e = { };
 291         int error;
 292
 293         if (!tomoyo_correct_word(filename))
 294                 return -EINVAL;
 295         e.filename = tomoyo_get_name(filename);
 296         if (!e.filename)
 297                 return -ENOMEM;
 298         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 299                                      &tomoyo_policy_list
 300                                      [TOMOYO_ID_GLOBALLY_READABLE],
 301                                      tomoyo_same_globally_readable);
 302         tomoyo_put_name(e.filename);
 303         return error;
 304 }
 305
 306 /**
 307  * tomoyo_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading.
 308  *
 309  * @filename: The filename to check.
 310  *
 311  * Returns true if any domain can open @filename for reading, false otherwise.
 312  *
 313  * Caller holds tomoyo_read_lock().
 314  */
 315 static bool tomoyo_globally_readable_file(const struct tomoyo_path_info *
 316                                              filename)
 317 {
 318         struct tomoyo_globally_readable_file_entry *ptr;
 319         bool found = false;
 320
 321         list_for_each_entry_rcu(ptr, &tomoyo_policy_list
 322                                 [TOMOYO_ID_GLOBALLY_READABLE], head.list) {
 323                 if (!ptr->head.is_deleted &&
 324                     tomoyo_path_matches_pattern(filename, ptr->filename)) {
 325                         found = true;
 326                         break;
 327                 }
 328         }
 329         return found;
 330 }
 331
 332 /**
 333  * tomoyo_write_globally_readable_policy - Write "struct tomoyo_globally_readable_file_entry" list.
 334  *
 335  * @data:      String to parse.
 336  * @is_delete: True if it is a delete request.
 337  *
 338  * Returns 0 on success, negative value otherwise.
 339  *
 340  * Caller holds tomoyo_read_lock().
 341  */
 342 int tomoyo_write_globally_readable_policy(char *data, const bool is_delete)
 343 {
 344         return tomoyo_update_globally_readable_entry(data, is_delete);
 345 }
 346
 347 static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a,
 348                                 const struct tomoyo_acl_head *b)
 349 {
 350         return container_of(a, struct tomoyo_pattern_entry, head)->pattern ==
 351                 container_of(b, struct tomoyo_pattern_entry, head)->pattern;
 352 }
 353
 354 /**
 355  * tomoyo_update_file_pattern_entry - Update "struct tomoyo_pattern_entry" list.
 356  *
 357  * @pattern:   Pathname pattern.
 358  * @is_delete: True if it is a delete request.
 359  *
 360  * Returns 0 on success, negative value otherwise.
 361  *
 362  * Caller holds tomoyo_read_lock().
 363  */
 364 static int tomoyo_update_file_pattern_entry(const char *pattern,
 365                                             const bool is_delete)
 366 {
 367         struct tomoyo_pattern_entry e = { };
 368         int error;
 369
 370         if (!tomoyo_correct_word(pattern))
 371                 return -EINVAL;
 372         e.pattern = tomoyo_get_name(pattern);
 373         if (!e.pattern)
 374                 return -ENOMEM;
 375         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 376                                      &tomoyo_policy_list[TOMOYO_ID_PATTERN],
 377                                      tomoyo_same_pattern);
 378         tomoyo_put_name(e.pattern);
 379         return error;
 380 }
 381
 382 /**
 383  * tomoyo_file_pattern - Get patterned pathname.
 384  *
 385  * @filename: The filename to find patterned pathname.
 386  *
 387  * Returns pointer to pathname pattern if matched, @filename otherwise.
 388  *
 389  * Caller holds tomoyo_read_lock().
 390  */
 391 const char *tomoyo_file_pattern(const struct tomoyo_path_info *filename)
 392 {
 393         struct tomoyo_pattern_entry *ptr;
 394         const struct tomoyo_path_info *pattern = NULL;
 395
 396         list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_PATTERN],
 397                                 head.list) {
 398                 if (ptr->head.is_deleted)
 399                         continue;
 400                 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
 401                         continue;
 402                 pattern = ptr->pattern;
 403                 if (tomoyo_strendswith(pattern->name, "/\\*")) {
 404                         /* Do nothing. Try to find the better match. */
 405                 } else {
 406                         /* This would be the better match. Use this. */
 407                         break;
 408                 }
 409         }
 410         if (pattern)
 411                 filename = pattern;
 412         return filename->name;
 413 }
 414
 415 /**
 416  * tomoyo_write_pattern_policy - Write "struct tomoyo_pattern_entry" list.
 417  *
 418  * @data:      String to parse.
 419  * @is_delete: True if it is a delete request.
 420  *
 421  * Returns 0 on success, negative value otherwise.
 422  *
 423  * Caller holds tomoyo_read_lock().
 424  */
 425 int tomoyo_write_pattern_policy(char *data, const bool is_delete)
 426 {
 427         return tomoyo_update_file_pattern_entry(data, is_delete);
 428 }
 429
 430 static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a,
 431                                    const struct tomoyo_acl_head *b)
 432 {
 433         return container_of(a, struct tomoyo_no_rewrite_entry, head)->pattern
 434                 == container_of(b, struct tomoyo_no_rewrite_entry, head)
 435                 ->pattern;
 436 }
 437
 438 /**
 439  * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite_entry" list.
 440  *
 441  * @pattern:   Pathname pattern that are not rewritable by default.
 442  * @is_delete: True if it is a delete request.
 443  *
 444  * Returns 0 on success, negative value otherwise.
 445  *
 446  * Caller holds tomoyo_read_lock().
 447  */
 448 static int tomoyo_update_no_rewrite_entry(const char *pattern,
 449                                           const bool is_delete)
 450 {
 451         struct tomoyo_no_rewrite_entry e = { };
 452         int error;
 453
 454         if (!tomoyo_correct_word(pattern))
 455                 return -EINVAL;
 456         e.pattern = tomoyo_get_name(pattern);
 457         if (!e.pattern)
 458                 return -ENOMEM;
 459         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 460                                      &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
 461                                      tomoyo_same_no_rewrite);
 462         tomoyo_put_name(e.pattern);
 463         return error;
 464 }
 465
 466 /**
 467  * tomoyo_no_rewrite_file - Check if the given pathname is not permitted to be rewrited.
 468  *
 469  * @filename: Filename to check.
 470  *
 471  * Returns true if @filename is specified by "deny_rewrite" directive,
 472  * false otherwise.
 473  *
 474  * Caller holds tomoyo_read_lock().
 475  */
 476 static bool tomoyo_no_rewrite_file(const struct tomoyo_path_info *filename)
 477 {
 478         struct tomoyo_no_rewrite_entry *ptr;
 479         bool found = false;
 480
 481         list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
 482                                 head.list) {
 483                 if (ptr->head.is_deleted)
 484                         continue;
 485                 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
 486                         continue;
 487                 found = true;
 488                 break;
 489         }
 490         return found;
 491 }
 492
 493 /**
 494  * tomoyo_write_no_rewrite_policy - Write "struct tomoyo_no_rewrite_entry" list.
 495  *
 496  * @data:      String to parse.
 497  * @is_delete: True if it is a delete request.
 498  *
 499  * Returns 0 on success, negative value otherwise.
 500  *
 501  * Caller holds tomoyo_read_lock().
 502  */
 503 int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete)
 504 {
 505         return tomoyo_update_no_rewrite_entry(data, is_delete);
 506 }
 507
 508 static bool tomoyo_check_path_acl(const struct tomoyo_request_info *r,
 509                                   const struct tomoyo_acl_info *ptr)
 510 {
 511         const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
 512                                                          head);
 513         return (acl->perm & (1 << r->param.path.operation)) &&
 514                 tomoyo_compare_name_union(r->param.path.filename, &acl->name);
 515 }
 516
 517 static bool tomoyo_check_path_number_acl(const struct tomoyo_request_info *r,
 518                                          const struct tomoyo_acl_info *ptr)
 519 {
 520         const struct tomoyo_path_number_acl *acl =
 521                 container_of(ptr, typeof(*acl), head);
 522         return (acl->perm & (1 << r->param.path_number.operation)) &&
 523                 tomoyo_compare_number_union(r->param.path_number.number,
 524                                             &acl->number) &&
 525                 tomoyo_compare_name_union(r->param.path_number.filename,
 526                                           &acl->name);
 527 }
 528
 529 static bool tomoyo_check_path2_acl(const struct tomoyo_request_info *r,
 530                                    const struct tomoyo_acl_info *ptr)
 531 {
 532         const struct tomoyo_path2_acl *acl =
 533                 container_of(ptr, typeof(*acl), head);
 534         return (acl->perm & (1 << r->param.path2.operation)) &&
 535                 tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
 536                 && tomoyo_compare_name_union(r->param.path2.filename2,
 537                                              &acl->name2);
 538 }
 539
 540 static bool tomoyo_check_mkdev_acl(const struct tomoyo_request_info *r,
 541                                 const struct tomoyo_acl_info *ptr)
 542 {
 543         const struct tomoyo_mkdev_acl *acl =
 544                 container_of(ptr, typeof(*acl), head);
 545         return (acl->perm & (1 << r->param.mkdev.operation)) &&
 546                 tomoyo_compare_number_union(r->param.mkdev.mode,
 547                                             &acl->mode) &&
 548                 tomoyo_compare_number_union(r->param.mkdev.major,
 549                                             &acl->major) &&
 550                 tomoyo_compare_number_union(r->param.mkdev.minor,
 551                                             &acl->minor) &&
 552                 tomoyo_compare_name_union(r->param.mkdev.filename,
 553                                           &acl->name);
 554 }
 555
 556 static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
 557                                  const struct tomoyo_acl_info *b)
 558 {
 559         const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head);
 560         const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head);
 561         return tomoyo_same_acl_head(&p1->head, &p2->head) &&
 562                 tomoyo_same_name_union(&p1->name, &p2->name);
 563 }
 564
 565 static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a,
 566                                   struct tomoyo_acl_info *b,
 567                                   const bool is_delete)
 568 {
 569         u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head)
 570                 ->perm;
 571         u16 perm = *a_perm;
 572         const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm;
 573         if (is_delete) {
 574                 perm &= ~b_perm;
 575                 if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK)
 576                         perm &= ~(1 << TOMOYO_TYPE_READ_WRITE);
 577                 else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE)))
 578                         perm &= ~TOMOYO_RW_MASK;
 579         } else {
 580                 perm |= b_perm;
 581                 if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK)
 582                         perm |= (1 << TOMOYO_TYPE_READ_WRITE);
 583                 else if (perm & (1 << TOMOYO_TYPE_READ_WRITE))
 584                         perm |= TOMOYO_RW_MASK;
 585         }
 586         *a_perm = perm;
 587         return !perm;
 588 }
 589
 590 /**
 591  * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
 592  *
 593  * @type:      Type of operation.
 594  * @filename:  Filename.
 595  * @domain:    Pointer to "struct tomoyo_domain_info".
 596  * @is_delete: True if it is a delete request.
 597  *
 598  * Returns 0 on success, negative value otherwise.
 599  *
 600  * Caller holds tomoyo_read_lock().
 601  */
 602 static int tomoyo_update_path_acl(const u8 type, const char *filename,
 603                                   struct tomoyo_domain_info * const domain,
 604                                   const bool is_delete)
 605 {
 606         struct tomoyo_path_acl e = {
 607                 .head.type = TOMOYO_TYPE_PATH_ACL,
 608                 .perm = 1 << type
 609         };
 610         int error;
 611         if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE))
 612                 e.perm |= TOMOYO_RW_MASK;
 613         if (!tomoyo_parse_name_union(filename, &e.name))
 614                 return -EINVAL;
 615         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 616                                      tomoyo_same_path_acl,
 617                                      tomoyo_merge_path_acl);
 618         tomoyo_put_name_union(&e.name);
 619         return error;
 620 }
 621
 622 static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a,
 623                                          const struct tomoyo_acl_info *b)
 624 {
 625         const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1),
 626                                                                 head);
 627         const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2),
 628                                                                 head);
 629         return tomoyo_same_acl_head(&p1->head, &p2->head)
 630                 && tomoyo_same_name_union(&p1->name, &p2->name)
 631                 && tomoyo_same_number_union(&p1->mode, &p2->mode)
 632                 && tomoyo_same_number_union(&p1->major, &p2->major)
 633                 && tomoyo_same_number_union(&p1->minor, &p2->minor);
 634 }
 635
 636 static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a,
 637                                           struct tomoyo_acl_info *b,
 638                                           const bool is_delete)
 639 {
 640         u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl,
 641                                          head)->perm;
 642         u8 perm = *a_perm;
 643         const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head)
 644                 ->perm;
 645         if (is_delete)
 646                 perm &= ~b_perm;
 647         else
 648                 perm |= b_perm;
 649         *a_perm = perm;
 650         return !perm;
 651 }
 652
 653 /**
 654  * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
 655  *
 656  * @type:      Type of operation.
 657  * @filename:  Filename.
 658  * @mode:      Create mode.
 659  * @major:     Device major number.
 660  * @minor:     Device minor number.
 661  * @domain:    Pointer to "struct tomoyo_domain_info".
 662  * @is_delete: True if it is a delete request.
 663  *
 664  * Returns 0 on success, negative value otherwise.
 665  *
 666  * Caller holds tomoyo_read_lock().
 667  */
 668 static int tomoyo_update_mkdev_acl(const u8 type, const char *filename,
 669                                           char *mode, char *major, char *minor,
 670                                           struct tomoyo_domain_info * const
 671                                           domain, const bool is_delete)
 672 {
 673         struct tomoyo_mkdev_acl e = {
 674                 .head.type = TOMOYO_TYPE_MKDEV_ACL,
 675                 .perm = 1 << type
 676         };
 677         int error = is_delete ? -ENOENT : -ENOMEM;
 678         if (!tomoyo_parse_name_union(filename, &e.name) ||
 679             !tomoyo_parse_number_union(mode, &e.mode) ||
 680             !tomoyo_parse_number_union(major, &e.major) ||
 681             !tomoyo_parse_number_union(minor, &e.minor))
 682                 goto out;
 683         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 684                                      tomoyo_same_mkdev_acl,
 685                                      tomoyo_merge_mkdev_acl);
 686  out:
 687         tomoyo_put_name_union(&e.name);
 688         tomoyo_put_number_union(&e.mode);
 689         tomoyo_put_number_union(&e.major);
 690         tomoyo_put_number_union(&e.minor);
 691         return error;
 692 }
 693
 694 static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a,
 695                                   const struct tomoyo_acl_info *b)
 696 {
 697         const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head);
 698         const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head);
 699         return tomoyo_same_acl_head(&p1->head, &p2->head)
 700                 && tomoyo_same_name_union(&p1->name1, &p2->name1)
 701                 && tomoyo_same_name_union(&p1->name2, &p2->name2);
 702 }
 703
 704 static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a,
 705                                    struct tomoyo_acl_info *b,
 706                                    const bool is_delete)
 707 {
 708         u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head)
 709                 ->perm;
 710         u8 perm = *a_perm;
 711         const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm;
 712         if (is_delete)
 713                 perm &= ~b_perm;
 714         else
 715                 perm |= b_perm;
 716         *a_perm = perm;
 717         return !perm;
 718 }
 719
 720 /**
 721  * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
 722  *
 723  * @type:      Type of operation.
 724  * @filename1: First filename.
 725  * @filename2: Second filename.
 726  * @domain:    Pointer to "struct tomoyo_domain_info".
 727  * @is_delete: True if it is a delete request.
 728  *
 729  * Returns 0 on success, negative value otherwise.
 730  *
 731  * Caller holds tomoyo_read_lock().
 732  */
 733 static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
 734                                    const char *filename2,
 735                                    struct tomoyo_domain_info * const domain,
 736                                    const bool is_delete)
 737 {
 738         struct tomoyo_path2_acl e = {
 739                 .head.type = TOMOYO_TYPE_PATH2_ACL,
 740                 .perm = 1 << type
 741         };
 742         int error = is_delete ? -ENOENT : -ENOMEM;
 743         if (!tomoyo_parse_name_union(filename1, &e.name1) ||
 744             !tomoyo_parse_name_union(filename2, &e.name2))
 745                 goto out;
 746         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 747                                      tomoyo_same_path2_acl,
 748                                      tomoyo_merge_path2_acl);
 749  out:
 750         tomoyo_put_name_union(&e.name1);
 751         tomoyo_put_name_union(&e.name2);
 752         return error;
 753 }
 754
 755 /**
 756  * tomoyo_path_permission - Check permission for single path operation.
 757  *
 758  * @r:         Pointer to "struct tomoyo_request_info".
 759  * @operation: Type of operation.
 760  * @filename:  Filename to check.
 761  *
 762  * Returns 0 on success, negative value otherwise.
 763  *
 764  * Caller holds tomoyo_read_lock().
 765  */
 766 int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 767                            const struct tomoyo_path_info *filename)
 768 {
 769         int error;
 770
 771  next:
 772         r->type = tomoyo_p2mac[operation];
 773         r->mode = tomoyo_get_mode(r->profile, r->type);
 774         if (r->mode == TOMOYO_CONFIG_DISABLED)
 775                 return 0;
 776         r->param_type = TOMOYO_TYPE_PATH_ACL;
 777         r->param.path.filename = filename;
 778         r->param.path.operation = operation;
 779         do {
 780                 tomoyo_check_acl(r, tomoyo_check_path_acl);
 781                 if (!r->granted && operation == TOMOYO_TYPE_READ &&
 782                     !r->domain->ignore_global_allow_read &&
 783                     tomoyo_globally_readable_file(filename))
 784                         r->granted = true;
 785                 error = tomoyo_audit_path_log(r);
 786                 /*
 787                  * Do not retry for execute request, for alias may have
 788                  * changed.
 789                  */
 790         } while (error == TOMOYO_RETRY_REQUEST &&
 791                  operation != TOMOYO_TYPE_EXECUTE);
 792         /*
 793          * Since "allow_truncate" doesn't imply "allow_rewrite" permission,
 794          * we need to check "allow_rewrite" permission if the filename is
 795          * specified by "deny_rewrite" keyword.
 796          */
 797         if (!error && operation == TOMOYO_TYPE_TRUNCATE &&
 798             tomoyo_no_rewrite_file(filename)) {
 799                 operation = TOMOYO_TYPE_REWRITE;
 800                 goto next;
 801         }
 802         return error;
 803 }
 804
 805 static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
 806                                         const struct tomoyo_acl_info *b)
 807 {
 808         const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1),
 809                                                                head);
 810         const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2),
 811                                                                head);
 812         return tomoyo_same_acl_head(&p1->head, &p2->head)
 813                 && tomoyo_same_name_union(&p1->name, &p2->name)
 814                 && tomoyo_same_number_union(&p1->number, &p2->number);
 815 }
 816
 817 static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a,
 818                                          struct tomoyo_acl_info *b,
 819                                          const bool is_delete)
 820 {
 821         u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl,
 822                                           head)->perm;
 823         u8 perm = *a_perm;
 824         const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head)
 825                 ->perm;
 826         if (is_delete)
 827                 perm &= ~b_perm;
 828         else
 829                 perm |= b_perm;
 830         *a_perm = perm;
 831         return !perm;
 832 }
 833
 834 /**
 835  * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
 836  *
 837  * @type:      Type of operation.
 838  * @filename:  Filename.
 839  * @number:    Number.
 840  * @domain:    Pointer to "struct tomoyo_domain_info".
 841  * @is_delete: True if it is a delete request.
 842  *
 843  * Returns 0 on success, negative value otherwise.
 844  */
 845 static int tomoyo_update_path_number_acl(const u8 type, const char *filename,
 846                                          char *number,
 847                                          struct tomoyo_domain_info * const
 848                                          domain,
 849                                          const bool is_delete)
 850 {
 851         struct tomoyo_path_number_acl e = {
 852                 .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
 853                 .perm = 1 << type
 854         };
 855         int error = is_delete ? -ENOENT : -ENOMEM;
 856         if (!tomoyo_parse_name_union(filename, &e.name))
 857                 return -EINVAL;
 858         if (!tomoyo_parse_number_union(number, &e.number))
 859                 goto out;
 860         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 861                                      tomoyo_same_path_number_acl,
 862                                      tomoyo_merge_path_number_acl);
 863  out:
 864         tomoyo_put_name_union(&e.name);
 865         tomoyo_put_number_union(&e.number);
 866         return error;
 867 }
 868
 869 /**
 870  * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
 871  *
 872  * @type:   Type of operation.
 873  * @path:   Pointer to "struct path".
 874  * @number: Number.
 875  *
 876  * Returns 0 on success, negative value otherwise.
 877  */
 878 int tomoyo_path_number_perm(const u8 type, struct path *path,
 879                             unsigned long number)
 880 {
 881         struct tomoyo_request_info r;
 882         int error = -ENOMEM;
 883         struct tomoyo_path_info buf;
 884         int idx;
 885
 886         if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
 887             == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry)
 888                 return 0;
 889         idx = tomoyo_read_lock();
 890         if (!tomoyo_get_realpath(&buf, path))
 891                 goto out;
 892         if (type == TOMOYO_TYPE_MKDIR)
 893                 tomoyo_add_slash(&buf);
 894         r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
 895         r.param.path_number.operation = type;
 896         r.param.path_number.filename = &buf;
 897         r.param.path_number.number = number;
 898         do {
 899                 tomoyo_check_acl(&r, tomoyo_check_path_number_acl);
 900                 error = tomoyo_audit_path_number_log(&r);
 901         } while (error == TOMOYO_RETRY_REQUEST);
 902         kfree(buf.name);
 903  out:
 904         tomoyo_read_unlock(idx);
 905         if (r.mode != TOMOYO_CONFIG_ENFORCING)
 906                 error = 0;
 907         return error;
 908 }
 909
 910 /**
 911  * tomoyo_check_open_permission - Check permission for "read" and "write".
 912  *
 913  * @domain: Pointer to "struct tomoyo_domain_info".
 914  * @path:   Pointer to "struct path".
 915  * @flag:   Flags for open().
 916  *
 917  * Returns 0 on success, negative value otherwise.
 918  */
 919 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 920                                  struct path *path, const int flag)
 921 {
 922         const u8 acc_mode = ACC_MODE(flag);
 923         int error = -ENOMEM;
 924         struct tomoyo_path_info buf;
 925         struct tomoyo_request_info r;
 926         int idx;
 927
 928         if (!path->mnt ||
 929             (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode)))
 930                 return 0;
 931         buf.name = NULL;
 932         r.mode = TOMOYO_CONFIG_DISABLED;
 933         idx = tomoyo_read_lock();
 934         if (!tomoyo_get_realpath(&buf, path))
 935                 goto out;
 936         error = 0;
 937         /*
 938          * If the filename is specified by "deny_rewrite" keyword,
 939          * we need to check "allow_rewrite" permission when the filename is not
 940          * opened for append mode or the filename is truncated at open time.
 941          */
 942         if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND)
 943             && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE)
 944             != TOMOYO_CONFIG_DISABLED) {
 945                 if (!tomoyo_get_realpath(&buf, path)) {
 946                         error = -ENOMEM;
 947                         goto out;
 948                 }
 949                 if (tomoyo_no_rewrite_file(&buf))
 950                         error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE,
 951                                                        &buf);
 952         }
 953         if (!error && acc_mode &&
 954             tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN)
 955             != TOMOYO_CONFIG_DISABLED) {
 956                 u8 operation;
 957                 if (!buf.name && !tomoyo_get_realpath(&buf, path)) {
 958                         error = -ENOMEM;
 959                         goto out;
 960                 }
 961                 if (acc_mode == (MAY_READ | MAY_WRITE))
 962                         operation = TOMOYO_TYPE_READ_WRITE;
 963                 else if (acc_mode == MAY_READ)
 964                         operation = TOMOYO_TYPE_READ;
 965                 else
 966                         operation = TOMOYO_TYPE_WRITE;
 967                 error = tomoyo_path_permission(&r, operation, &buf);
 968         }
 969  out:
 970         kfree(buf.name);
 971         tomoyo_read_unlock(idx);
 972         if (r.mode != TOMOYO_CONFIG_ENFORCING)
 973                 error = 0;
 974         return error;
 975 }
 976
 977 /**
 978  * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount".
 979  *
 980  * @operation: Type of operation.
 981  * @path:      Pointer to "struct path".
 982  *
 983  * Returns 0 on success, negative value otherwise.
 984  */
 985 int tomoyo_path_perm(const u8 operation, struct path *path)
 986 {
 987         int error = -ENOMEM;
 988         struct tomoyo_path_info buf;
 989         struct tomoyo_request_info r;
 990         int idx;
 991
 992         if (!path->mnt)
 993                 return 0;
 994         if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
 995             == TOMOYO_CONFIG_DISABLED)
 996                 return 0;
 997         buf.name = NULL;
 998         idx = tomoyo_read_lock();
 999         if (!tomoyo_get_realpath(&buf, path))
1000                 goto out;
1001         switch (operation) {
1002         case TOMOYO_TYPE_REWRITE:
1003                 if (!tomoyo_no_rewrite_file(&buf)) {
1004                         error = 0;
1005                         goto out;
1006                 }
1007                 break;
1008         case TOMOYO_TYPE_RMDIR:
1009         case TOMOYO_TYPE_CHROOT:
1010         case TOMOYO_TYPE_UMOUNT:
1011                 tomoyo_add_slash(&buf);
1012                 break;
1013         }
1014         error = tomoyo_path_permission(&r, operation, &buf);
1015  out:
1016         kfree(buf.name);
1017         tomoyo_read_unlock(idx);
1018         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1019                 error = 0;
1020         return error;
1021 }
1022
1023 /**
1024  * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
1025  *
1026  * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
1027  * @path:      Pointer to "struct path".
1028  * @mode:      Create mode.
1029  * @dev:       Device number.
1030  *
1031  * Returns 0 on success, negative value otherwise.
1032  */
1033 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
1034                              const unsigned int mode, unsigned int dev)
1035 {
1036         struct tomoyo_request_info r;
1037         int error = -ENOMEM;
1038         struct tomoyo_path_info buf;
1039         int idx;
1040
1041         if (!path->mnt ||
1042             tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
1043             == TOMOYO_CONFIG_DISABLED)
1044                 return 0;
1045         idx = tomoyo_read_lock();
1046         error = -ENOMEM;
1047         if (tomoyo_get_realpath(&buf, path)) {
1048                 dev = new_decode_dev(dev);
1049                 r.param_type = TOMOYO_TYPE_MKDEV_ACL;
1050                 r.param.mkdev.filename = &buf;
1051                 r.param.mkdev.operation = operation;
1052                 r.param.mkdev.mode = mode;
1053                 r.param.mkdev.major = MAJOR(dev);
1054                 r.param.mkdev.minor = MINOR(dev);
1055                 tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
1056                 error = tomoyo_audit_mkdev_log(&r);
1057                 kfree(buf.name);
1058         }
1059         tomoyo_read_unlock(idx);
1060         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1061                 error = 0;
1062         return error;
1063 }
1064
1065 /**
1066  * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
1067  *
1068  * @operation: Type of operation.
1069  * @path1:      Pointer to "struct path".
1070  * @path2:      Pointer to "struct path".
1071  *
1072  * Returns 0 on success, negative value otherwise.
1073  */
1074 int tomoyo_path2_perm(const u8 operation, struct path *path1,
1075                       struct path *path2)
1076 {
1077         int error = -ENOMEM;
1078         struct tomoyo_path_info buf1;
1079         struct tomoyo_path_info buf2;
1080         struct tomoyo_request_info r;
1081         int idx;
1082
1083         if (!path1->mnt || !path2->mnt ||
1084             tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
1085             == TOMOYO_CONFIG_DISABLED)
1086                 return 0;
1087         buf1.name = NULL;
1088         buf2.name = NULL;
1089         idx = tomoyo_read_lock();
1090         if (!tomoyo_get_realpath(&buf1, path1) ||
1091             !tomoyo_get_realpath(&buf2, path2))
1092                 goto out;
1093         switch (operation) {
1094                 struct dentry *dentry;
1095         case TOMOYO_TYPE_RENAME:
1096         case TOMOYO_TYPE_LINK:
1097                 dentry = path1->dentry;
1098                 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
1099                         break;
1100                 /* fall through */
1101         case TOMOYO_TYPE_PIVOT_ROOT:
1102                 tomoyo_add_slash(&buf1);
1103                 tomoyo_add_slash(&buf2);
1104                 break;
1105         }
1106         r.param_type = TOMOYO_TYPE_PATH2_ACL;
1107         r.param.path2.operation = operation;
1108         r.param.path2.filename1 = &buf1;
1109         r.param.path2.filename2 = &buf2;
1110         do {
1111                 tomoyo_check_acl(&r, tomoyo_check_path2_acl);
1112                 error = tomoyo_audit_path2_log(&r);
1113         } while (error == TOMOYO_RETRY_REQUEST);
1114  out:
1115         kfree(buf1.name);
1116         kfree(buf2.name);
1117         tomoyo_read_unlock(idx);
1118         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1119                 error = 0;
1120         return error;
1121 }
1122
1123 /**
1124  * tomoyo_write_file_policy - Update file related list.
1125  *
1126  * @data:      String to parse.
1127  * @domain:    Pointer to "struct tomoyo_domain_info".
1128  * @is_delete: True if it is a delete request.
1129  *
1130  * Returns 0 on success, negative value otherwise.
1131  *
1132  * Caller holds tomoyo_read_lock().
1133  */
1134 int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
1135                              const bool is_delete)
1136 {
1137         char *w[5];
1138         u8 type;
1139         if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
1140                 return -EINVAL;
1141         if (strncmp(w[0], "allow_", 6))
1142                 goto out;
1143         w[0] += 6;
1144         for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
1145                 if (strcmp(w[0], tomoyo_path_keyword[type]))
1146                         continue;
1147                 return tomoyo_update_path_acl(type, w[1], domain, is_delete);
1148         }
1149         if (!w[2][0])
1150                 goto out;
1151         for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
1152                 if (strcmp(w[0], tomoyo_path2_keyword[type]))
1153                         continue;
1154                 return tomoyo_update_path2_acl(type, w[1], w[2], domain,
1155                                                is_delete);
1156         }
1157         for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
1158                 if (strcmp(w[0], tomoyo_path_number_keyword[type]))
1159                         continue;
1160                 return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
1161                                                      is_delete);
1162         }
1163         if (!w[3][0] || !w[4][0])
1164                 goto out;
1165         for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) {
1166                 if (strcmp(w[0], tomoyo_mkdev_keyword[type]))
1167                         continue;
1168                 return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3],
1169                                                w[4], domain, is_delete);
1170         }
1171  out:
1172         return -EINVAL;
1173 }