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