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 const struct tomoyo_path_info *
  99 tomoyo_compare_name_union(const struct tomoyo_path_info *name,
 100                           const struct tomoyo_name_union *ptr)
 101 {
 102         if (ptr->is_group)
 103                 return tomoyo_path_matches_group(name, ptr->group);
 104         if (tomoyo_path_matches_pattern(name, ptr->filename))
 105                 return ptr->filename;
 106         return NULL;
 107 }
 108
 109 void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
 110 {
 111         if (ptr && ptr->is_group)
 112                 tomoyo_put_group(ptr->group);
 113 }
 114
 115 bool tomoyo_compare_number_union(const unsigned long value,
 116                                  const struct tomoyo_number_union *ptr)
 117 {
 118         if (ptr->is_group)
 119                 return tomoyo_number_matches_group(value, value, ptr->group);
 120         return value >= ptr->values[0] && value <= ptr->values[1];
 121 }
 122
 123 static void tomoyo_add_slash(struct tomoyo_path_info *buf)
 124 {
 125         if (buf->is_dir)
 126                 return;
 127         /*
 128          * This is OK because tomoyo_encode() reserves space for appending "/".
 129          */
 130         strcat((char *) buf->name, "/");
 131         tomoyo_fill_path_info(buf);
 132 }
 133
 134 /**
 135  * tomoyo_strendswith - Check whether the token ends with the given token.
 136  *
 137  * @name: The token to check.
 138  * @tail: The token to find.
 139  *
 140  * Returns true if @name ends with @tail, false otherwise.
 141  */
 142 static bool tomoyo_strendswith(const char *name, const char *tail)
 143 {
 144         int len;
 145
 146         if (!name || !tail)
 147                 return false;
 148         len = strlen(name) - strlen(tail);
 149         return len >= 0 && !strcmp(name + len, tail);
 150 }
 151
 152 /**
 153  * tomoyo_get_realpath - Get realpath.
 154  *
 155  * @buf:  Pointer to "struct tomoyo_path_info".
 156  * @path: Pointer to "struct path".
 157  *
 158  * Returns true on success, false otherwise.
 159  */
 160 static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
 161 {
 162         buf->name = tomoyo_realpath_from_path(path);
 163         if (buf->name) {
 164                 tomoyo_fill_path_info(buf);
 165                 return true;
 166         }
 167         return false;
 168 }
 169
 170 /**
 171  * tomoyo_audit_path_log - Audit path request log.
 172  *
 173  * @r: Pointer to "struct tomoyo_request_info".
 174  *
 175  * Returns 0 on success, negative value otherwise.
 176  */
 177 static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
 178 {
 179         const char *operation = tomoyo_path_keyword[r->param.path.operation];
 180         const struct tomoyo_path_info *filename = r->param.path.filename;
 181         if (r->granted)
 182                 return 0;
 183         tomoyo_warn_log(r, "%s %s", operation, filename->name);
 184         return tomoyo_supervisor(r, "allow_%s %s\n", operation,
 185                                  tomoyo_pattern(filename));
 186 }
 187
 188 /**
 189  * tomoyo_audit_path2_log - Audit path/path request log.
 190  *
 191  * @r: Pointer to "struct tomoyo_request_info".
 192  *
 193  * Returns 0 on success, negative value otherwise.
 194  */
 195 static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
 196 {
 197         const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
 198         const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
 199         const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
 200         if (r->granted)
 201                 return 0;
 202         tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
 203                         filename2->name);
 204         return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
 205                                  tomoyo_pattern(filename1),
 206                                  tomoyo_pattern(filename2));
 207 }
 208
 209 /**
 210  * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
 211  *
 212  * @r: Pointer to "struct tomoyo_request_info".
 213  *
 214  * Returns 0 on success, negative value otherwise.
 215  */
 216 static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
 217 {
 218         const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
 219         const struct tomoyo_path_info *filename = r->param.mkdev.filename;
 220         const unsigned int major = r->param.mkdev.major;
 221         const unsigned int minor = r->param.mkdev.minor;
 222         const unsigned int mode = r->param.mkdev.mode;
 223         if (r->granted)
 224                 return 0;
 225         tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
 226                         major, minor);
 227         return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation,
 228                                  tomoyo_pattern(filename), mode, major, minor);
 229 }
 230
 231 /**
 232  * tomoyo_audit_path_number_log - Audit path/number request log.
 233  *
 234  * @r:     Pointer to "struct tomoyo_request_info".
 235  * @error: Error code.
 236  *
 237  * Returns 0 on success, negative value otherwise.
 238  */
 239 static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
 240 {
 241         const u8 type = r->param.path_number.operation;
 242         u8 radix;
 243         const struct tomoyo_path_info *filename = r->param.path_number.filename;
 244         const char *operation = tomoyo_path_number_keyword[type];
 245         char buffer[64];
 246         if (r->granted)
 247                 return 0;
 248         switch (type) {
 249         case TOMOYO_TYPE_CREATE:
 250         case TOMOYO_TYPE_MKDIR:
 251         case TOMOYO_TYPE_MKFIFO:
 252         case TOMOYO_TYPE_MKSOCK:
 253         case TOMOYO_TYPE_CHMOD:
 254                 radix = TOMOYO_VALUE_TYPE_OCTAL;
 255                 break;
 256         case TOMOYO_TYPE_IOCTL:
 257                 radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
 258                 break;
 259         default:
 260                 radix = TOMOYO_VALUE_TYPE_DECIMAL;
 261                 break;
 262         }
 263         tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
 264                            radix);
 265         tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
 266         return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
 267                                  tomoyo_pattern(filename), buffer);
 268 }
 269
 270 static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a,
 271                                           const struct tomoyo_acl_head *b)
 272 {
 273         return container_of(a, struct tomoyo_readable_file,
 274                             head)->filename ==
 275                 container_of(b, struct tomoyo_readable_file,
 276                              head)->filename;
 277 }
 278
 279 /**
 280  * tomoyo_update_globally_readable_entry - Update "struct tomoyo_readable_file" list.
 281  *
 282  * @filename:  Filename unconditionally permitted to open() for reading.
 283  * @is_delete: True if it is a delete request.
 284  *
 285  * Returns 0 on success, negative value otherwise.
 286  *
 287  * Caller holds tomoyo_read_lock().
 288  */
 289 static int tomoyo_update_globally_readable_entry(const char *filename,
 290                                                  const bool is_delete)
 291 {
 292         struct tomoyo_readable_file e = { };
 293         int error;
 294
 295         if (!tomoyo_correct_word(filename))
 296                 return -EINVAL;
 297         e.filename = tomoyo_get_name(filename);
 298         if (!e.filename)
 299                 return -ENOMEM;
 300         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 301                                      &tomoyo_policy_list
 302                                      [TOMOYO_ID_GLOBALLY_READABLE],
 303                                      tomoyo_same_globally_readable);
 304         tomoyo_put_name(e.filename);
 305         return error;
 306 }
 307
 308 /**
 309  * tomoyo_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading.
 310  *
 311  * @filename: The filename to check.
 312  *
 313  * Returns true if any domain can open @filename for reading, false otherwise.
 314  *
 315  * Caller holds tomoyo_read_lock().
 316  */
 317 static bool tomoyo_globally_readable_file(const struct tomoyo_path_info *
 318                                              filename)
 319 {
 320         struct tomoyo_readable_file *ptr;
 321         bool found = false;
 322
 323         list_for_each_entry_rcu(ptr, &tomoyo_policy_list
 324                                 [TOMOYO_ID_GLOBALLY_READABLE], head.list) {
 325                 if (!ptr->head.is_deleted &&
 326                     tomoyo_path_matches_pattern(filename, ptr->filename)) {
 327                         found = true;
 328                         break;
 329                 }
 330         }
 331         return found;
 332 }
 333
 334 /**
 335  * tomoyo_write_globally_readable - Write "struct tomoyo_readable_file" list.
 336  *
 337  * @data:      String to parse.
 338  * @is_delete: True if it is a delete request.
 339  *
 340  * Returns 0 on success, negative value otherwise.
 341  *
 342  * Caller holds tomoyo_read_lock().
 343  */
 344 int tomoyo_write_globally_readable(char *data, const bool is_delete)
 345 {
 346         return tomoyo_update_globally_readable_entry(data, is_delete);
 347 }
 348
 349 static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a,
 350                                 const struct tomoyo_acl_head *b)
 351 {
 352         return container_of(a, struct tomoyo_no_pattern, head)->pattern ==
 353                 container_of(b, struct tomoyo_no_pattern, head)->pattern;
 354 }
 355
 356 /**
 357  * tomoyo_update_file_pattern_entry - Update "struct tomoyo_no_pattern" list.
 358  *
 359  * @pattern:   Pathname pattern.
 360  * @is_delete: True if it is a delete request.
 361  *
 362  * Returns 0 on success, negative value otherwise.
 363  *
 364  * Caller holds tomoyo_read_lock().
 365  */
 366 static int tomoyo_update_file_pattern_entry(const char *pattern,
 367                                             const bool is_delete)
 368 {
 369         struct tomoyo_no_pattern e = { };
 370         int error;
 371
 372         if (!tomoyo_correct_word(pattern))
 373                 return -EINVAL;
 374         e.pattern = tomoyo_get_name(pattern);
 375         if (!e.pattern)
 376                 return -ENOMEM;
 377         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 378                                      &tomoyo_policy_list[TOMOYO_ID_PATTERN],
 379                                      tomoyo_same_pattern);
 380         tomoyo_put_name(e.pattern);
 381         return error;
 382 }
 383
 384 /**
 385  * tomoyo_pattern - Get patterned pathname.
 386  *
 387  * @filename: The filename to find patterned pathname.
 388  *
 389  * Returns pointer to pathname pattern if matched, @filename otherwise.
 390  *
 391  * Caller holds tomoyo_read_lock().
 392  */
 393 const char *tomoyo_pattern(const struct tomoyo_path_info *filename)
 394 {
 395         struct tomoyo_no_pattern *ptr;
 396         const struct tomoyo_path_info *pattern = NULL;
 397
 398         list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_PATTERN],
 399                                 head.list) {
 400                 if (ptr->head.is_deleted)
 401                         continue;
 402                 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
 403                         continue;
 404                 pattern = ptr->pattern;
 405                 if (tomoyo_strendswith(pattern->name, "/\\*")) {
 406                         /* Do nothing. Try to find the better match. */
 407                 } else {
 408                         /* This would be the better match. Use this. */
 409                         break;
 410                 }
 411         }
 412         if (pattern)
 413                 filename = pattern;
 414         return filename->name;
 415 }
 416
 417 /**
 418  * tomoyo_write_pattern - Write "struct tomoyo_no_pattern" list.
 419  *
 420  * @data:      String to parse.
 421  * @is_delete: True if it is a delete request.
 422  *
 423  * Returns 0 on success, negative value otherwise.
 424  *
 425  * Caller holds tomoyo_read_lock().
 426  */
 427 int tomoyo_write_pattern(char *data, const bool is_delete)
 428 {
 429         return tomoyo_update_file_pattern_entry(data, is_delete);
 430 }
 431
 432 static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a,
 433                                    const struct tomoyo_acl_head *b)
 434 {
 435         return container_of(a, struct tomoyo_no_rewrite, head)->pattern
 436                 == container_of(b, struct tomoyo_no_rewrite, head)
 437                 ->pattern;
 438 }
 439
 440 /**
 441  * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite" list.
 442  *
 443  * @pattern:   Pathname pattern that are not rewritable by default.
 444  * @is_delete: True if it is a delete request.
 445  *
 446  * Returns 0 on success, negative value otherwise.
 447  *
 448  * Caller holds tomoyo_read_lock().
 449  */
 450 static int tomoyo_update_no_rewrite_entry(const char *pattern,
 451                                           const bool is_delete)
 452 {
 453         struct tomoyo_no_rewrite e = { };
 454         int error;
 455
 456         if (!tomoyo_correct_word(pattern))
 457                 return -EINVAL;
 458         e.pattern = tomoyo_get_name(pattern);
 459         if (!e.pattern)
 460                 return -ENOMEM;
 461         error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
 462                                      &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
 463                                      tomoyo_same_no_rewrite);
 464         tomoyo_put_name(e.pattern);
 465         return error;
 466 }
 467
 468 /**
 469  * tomoyo_no_rewrite_file - Check if the given pathname is not permitted to be rewrited.
 470  *
 471  * @filename: Filename to check.
 472  *
 473  * Returns true if @filename is specified by "deny_rewrite" directive,
 474  * false otherwise.
 475  *
 476  * Caller holds tomoyo_read_lock().
 477  */
 478 static bool tomoyo_no_rewrite_file(const struct tomoyo_path_info *filename)
 479 {
 480         struct tomoyo_no_rewrite *ptr;
 481         bool found = false;
 482
 483         list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
 484                                 head.list) {
 485                 if (ptr->head.is_deleted)
 486                         continue;
 487                 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
 488                         continue;
 489                 found = true;
 490                 break;
 491         }
 492         return found;
 493 }
 494
 495 /**
 496  * tomoyo_write_no_rewrite - Write "struct tomoyo_no_rewrite" list.
 497  *
 498  * @data:      String to parse.
 499  * @is_delete: True if it is a delete request.
 500  *
 501  * Returns 0 on success, negative value otherwise.
 502  *
 503  * Caller holds tomoyo_read_lock().
 504  */
 505 int tomoyo_write_no_rewrite(char *data, const bool is_delete)
 506 {
 507         return tomoyo_update_no_rewrite_entry(data, is_delete);
 508 }
 509
 510 static bool tomoyo_check_path_acl(struct tomoyo_request_info *r,
 511                                   const struct tomoyo_acl_info *ptr)
 512 {
 513         const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
 514                                                          head);
 515         if (acl->perm & (1 << r->param.path.operation)) {
 516                 r->param.path.matched_path =
 517                         tomoyo_compare_name_union(r->param.path.filename,
 518                                                   &acl->name);
 519                 return r->param.path.matched_path != NULL;
 520         }
 521         return false;
 522 }
 523
 524 static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r,
 525                                          const struct tomoyo_acl_info *ptr)
 526 {
 527         const struct tomoyo_path_number_acl *acl =
 528                 container_of(ptr, typeof(*acl), head);
 529         return (acl->perm & (1 << r->param.path_number.operation)) &&
 530                 tomoyo_compare_number_union(r->param.path_number.number,
 531                                             &acl->number) &&
 532                 tomoyo_compare_name_union(r->param.path_number.filename,
 533                                           &acl->name);
 534 }
 535
 536 static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r,
 537                                    const struct tomoyo_acl_info *ptr)
 538 {
 539         const struct tomoyo_path2_acl *acl =
 540                 container_of(ptr, typeof(*acl), head);
 541         return (acl->perm & (1 << r->param.path2.operation)) &&
 542                 tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
 543                 && tomoyo_compare_name_union(r->param.path2.filename2,
 544                                              &acl->name2);
 545 }
 546
 547 static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r,
 548                                 const struct tomoyo_acl_info *ptr)
 549 {
 550         const struct tomoyo_mkdev_acl *acl =
 551                 container_of(ptr, typeof(*acl), head);
 552         return (acl->perm & (1 << r->param.mkdev.operation)) &&
 553                 tomoyo_compare_number_union(r->param.mkdev.mode,
 554                                             &acl->mode) &&
 555                 tomoyo_compare_number_union(r->param.mkdev.major,
 556                                             &acl->major) &&
 557                 tomoyo_compare_number_union(r->param.mkdev.minor,
 558                                             &acl->minor) &&
 559                 tomoyo_compare_name_union(r->param.mkdev.filename,
 560                                           &acl->name);
 561 }
 562
 563 static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
 564                                  const struct tomoyo_acl_info *b)
 565 {
 566         const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head);
 567         const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head);
 568         return tomoyo_same_acl_head(&p1->head, &p2->head) &&
 569                 tomoyo_same_name_union(&p1->name, &p2->name);
 570 }
 571
 572 static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a,
 573                                   struct tomoyo_acl_info *b,
 574                                   const bool is_delete)
 575 {
 576         u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head)
 577                 ->perm;
 578         u16 perm = *a_perm;
 579         const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm;
 580         if (is_delete) {
 581                 perm &= ~b_perm;
 582                 if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK)
 583                         perm &= ~(1 << TOMOYO_TYPE_READ_WRITE);
 584                 else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE)))
 585                         perm &= ~TOMOYO_RW_MASK;
 586         } else {
 587                 perm |= b_perm;
 588                 if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK)
 589                         perm |= (1 << TOMOYO_TYPE_READ_WRITE);
 590                 else if (perm & (1 << TOMOYO_TYPE_READ_WRITE))
 591                         perm |= TOMOYO_RW_MASK;
 592         }
 593         *a_perm = perm;
 594         return !perm;
 595 }
 596
 597 /**
 598  * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
 599  *
 600  * @type:      Type of operation.
 601  * @filename:  Filename.
 602  * @domain:    Pointer to "struct tomoyo_domain_info".
 603  * @is_delete: True if it is a delete request.
 604  *
 605  * Returns 0 on success, negative value otherwise.
 606  *
 607  * Caller holds tomoyo_read_lock().
 608  */
 609 static int tomoyo_update_path_acl(const u8 type, const char *filename,
 610                                   struct tomoyo_domain_info * const domain,
 611                                   const bool is_delete)
 612 {
 613         struct tomoyo_path_acl e = {
 614                 .head.type = TOMOYO_TYPE_PATH_ACL,
 615                 .perm = 1 << type
 616         };
 617         int error;
 618         if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE))
 619                 e.perm |= TOMOYO_RW_MASK;
 620         if (!tomoyo_parse_name_union(filename, &e.name))
 621                 return -EINVAL;
 622         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 623                                      tomoyo_same_path_acl,
 624                                      tomoyo_merge_path_acl);
 625         tomoyo_put_name_union(&e.name);
 626         return error;
 627 }
 628
 629 static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a,
 630                                          const struct tomoyo_acl_info *b)
 631 {
 632         const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1),
 633                                                                 head);
 634         const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2),
 635                                                                 head);
 636         return tomoyo_same_acl_head(&p1->head, &p2->head)
 637                 && tomoyo_same_name_union(&p1->name, &p2->name)
 638                 && tomoyo_same_number_union(&p1->mode, &p2->mode)
 639                 && tomoyo_same_number_union(&p1->major, &p2->major)
 640                 && tomoyo_same_number_union(&p1->minor, &p2->minor);
 641 }
 642
 643 static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a,
 644                                           struct tomoyo_acl_info *b,
 645                                           const bool is_delete)
 646 {
 647         u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl,
 648                                          head)->perm;
 649         u8 perm = *a_perm;
 650         const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head)
 651                 ->perm;
 652         if (is_delete)
 653                 perm &= ~b_perm;
 654         else
 655                 perm |= b_perm;
 656         *a_perm = perm;
 657         return !perm;
 658 }
 659
 660 /**
 661  * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
 662  *
 663  * @type:      Type of operation.
 664  * @filename:  Filename.
 665  * @mode:      Create mode.
 666  * @major:     Device major number.
 667  * @minor:     Device minor number.
 668  * @domain:    Pointer to "struct tomoyo_domain_info".
 669  * @is_delete: True if it is a delete request.
 670  *
 671  * Returns 0 on success, negative value otherwise.
 672  *
 673  * Caller holds tomoyo_read_lock().
 674  */
 675 static int tomoyo_update_mkdev_acl(const u8 type, const char *filename,
 676                                           char *mode, char *major, char *minor,
 677                                           struct tomoyo_domain_info * const
 678                                           domain, const bool is_delete)
 679 {
 680         struct tomoyo_mkdev_acl e = {
 681                 .head.type = TOMOYO_TYPE_MKDEV_ACL,
 682                 .perm = 1 << type
 683         };
 684         int error = is_delete ? -ENOENT : -ENOMEM;
 685         if (!tomoyo_parse_name_union(filename, &e.name) ||
 686             !tomoyo_parse_number_union(mode, &e.mode) ||
 687             !tomoyo_parse_number_union(major, &e.major) ||
 688             !tomoyo_parse_number_union(minor, &e.minor))
 689                 goto out;
 690         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 691                                      tomoyo_same_mkdev_acl,
 692                                      tomoyo_merge_mkdev_acl);
 693  out:
 694         tomoyo_put_name_union(&e.name);
 695         tomoyo_put_number_union(&e.mode);
 696         tomoyo_put_number_union(&e.major);
 697         tomoyo_put_number_union(&e.minor);
 698         return error;
 699 }
 700
 701 static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a,
 702                                   const struct tomoyo_acl_info *b)
 703 {
 704         const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head);
 705         const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head);
 706         return tomoyo_same_acl_head(&p1->head, &p2->head)
 707                 && tomoyo_same_name_union(&p1->name1, &p2->name1)
 708                 && tomoyo_same_name_union(&p1->name2, &p2->name2);
 709 }
 710
 711 static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a,
 712                                    struct tomoyo_acl_info *b,
 713                                    const bool is_delete)
 714 {
 715         u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head)
 716                 ->perm;
 717         u8 perm = *a_perm;
 718         const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm;
 719         if (is_delete)
 720                 perm &= ~b_perm;
 721         else
 722                 perm |= b_perm;
 723         *a_perm = perm;
 724         return !perm;
 725 }
 726
 727 /**
 728  * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
 729  *
 730  * @type:      Type of operation.
 731  * @filename1: First filename.
 732  * @filename2: Second filename.
 733  * @domain:    Pointer to "struct tomoyo_domain_info".
 734  * @is_delete: True if it is a delete request.
 735  *
 736  * Returns 0 on success, negative value otherwise.
 737  *
 738  * Caller holds tomoyo_read_lock().
 739  */
 740 static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
 741                                    const char *filename2,
 742                                    struct tomoyo_domain_info * const domain,
 743                                    const bool is_delete)
 744 {
 745         struct tomoyo_path2_acl e = {
 746                 .head.type = TOMOYO_TYPE_PATH2_ACL,
 747                 .perm = 1 << type
 748         };
 749         int error = is_delete ? -ENOENT : -ENOMEM;
 750         if (!tomoyo_parse_name_union(filename1, &e.name1) ||
 751             !tomoyo_parse_name_union(filename2, &e.name2))
 752                 goto out;
 753         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 754                                      tomoyo_same_path2_acl,
 755                                      tomoyo_merge_path2_acl);
 756  out:
 757         tomoyo_put_name_union(&e.name1);
 758         tomoyo_put_name_union(&e.name2);
 759         return error;
 760 }
 761
 762 /**
 763  * tomoyo_path_permission - Check permission for single path operation.
 764  *
 765  * @r:         Pointer to "struct tomoyo_request_info".
 766  * @operation: Type of operation.
 767  * @filename:  Filename to check.
 768  *
 769  * Returns 0 on success, negative value otherwise.
 770  *
 771  * Caller holds tomoyo_read_lock().
 772  */
 773 int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 774                            const struct tomoyo_path_info *filename)
 775 {
 776         int error;
 777
 778  next:
 779         r->type = tomoyo_p2mac[operation];
 780         r->mode = tomoyo_get_mode(r->profile, r->type);
 781         if (r->mode == TOMOYO_CONFIG_DISABLED)
 782                 return 0;
 783         r->param_type = TOMOYO_TYPE_PATH_ACL;
 784         r->param.path.filename = filename;
 785         r->param.path.operation = operation;
 786         do {
 787                 tomoyo_check_acl(r, tomoyo_check_path_acl);
 788                 if (!r->granted && operation == TOMOYO_TYPE_READ &&
 789                     !r->domain->ignore_global_allow_read &&
 790                     tomoyo_globally_readable_file(filename))
 791                         r->granted = true;
 792                 error = tomoyo_audit_path_log(r);
 793                 /*
 794                  * Do not retry for execute request, for alias may have
 795                  * changed.
 796                  */
 797         } while (error == TOMOYO_RETRY_REQUEST &&
 798                  operation != TOMOYO_TYPE_EXECUTE);
 799         /*
 800          * Since "allow_truncate" doesn't imply "allow_rewrite" permission,
 801          * we need to check "allow_rewrite" permission if the filename is
 802          * specified by "deny_rewrite" keyword.
 803          */
 804         if (!error && operation == TOMOYO_TYPE_TRUNCATE &&
 805             tomoyo_no_rewrite_file(filename)) {
 806                 operation = TOMOYO_TYPE_REWRITE;
 807                 goto next;
 808         }
 809         return error;
 810 }
 811
 812 static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
 813                                         const struct tomoyo_acl_info *b)
 814 {
 815         const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1),
 816                                                                head);
 817         const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2),
 818                                                                head);
 819         return tomoyo_same_acl_head(&p1->head, &p2->head)
 820                 && tomoyo_same_name_union(&p1->name, &p2->name)
 821                 && tomoyo_same_number_union(&p1->number, &p2->number);
 822 }
 823
 824 static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a,
 825                                          struct tomoyo_acl_info *b,
 826                                          const bool is_delete)
 827 {
 828         u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl,
 829                                           head)->perm;
 830         u8 perm = *a_perm;
 831         const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head)
 832                 ->perm;
 833         if (is_delete)
 834                 perm &= ~b_perm;
 835         else
 836                 perm |= b_perm;
 837         *a_perm = perm;
 838         return !perm;
 839 }
 840
 841 /**
 842  * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
 843  *
 844  * @type:      Type of operation.
 845  * @filename:  Filename.
 846  * @number:    Number.
 847  * @domain:    Pointer to "struct tomoyo_domain_info".
 848  * @is_delete: True if it is a delete request.
 849  *
 850  * Returns 0 on success, negative value otherwise.
 851  */
 852 static int tomoyo_update_path_number_acl(const u8 type, const char *filename,
 853                                          char *number,
 854                                          struct tomoyo_domain_info * const
 855                                          domain,
 856                                          const bool is_delete)
 857 {
 858         struct tomoyo_path_number_acl e = {
 859                 .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
 860                 .perm = 1 << type
 861         };
 862         int error = is_delete ? -ENOENT : -ENOMEM;
 863         if (!tomoyo_parse_name_union(filename, &e.name))
 864                 return -EINVAL;
 865         if (!tomoyo_parse_number_union(number, &e.number))
 866                 goto out;
 867         error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
 868                                      tomoyo_same_path_number_acl,
 869                                      tomoyo_merge_path_number_acl);
 870  out:
 871         tomoyo_put_name_union(&e.name);
 872         tomoyo_put_number_union(&e.number);
 873         return error;
 874 }
 875
 876 /**
 877  * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
 878  *
 879  * @type:   Type of operation.
 880  * @path:   Pointer to "struct path".
 881  * @number: Number.
 882  *
 883  * Returns 0 on success, negative value otherwise.
 884  */
 885 int tomoyo_path_number_perm(const u8 type, struct path *path,
 886                             unsigned long number)
 887 {
 888         struct tomoyo_request_info r;
 889         int error = -ENOMEM;
 890         struct tomoyo_path_info buf;
 891         int idx;
 892
 893         if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
 894             == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry)
 895                 return 0;
 896         idx = tomoyo_read_lock();
 897         if (!tomoyo_get_realpath(&buf, path))
 898                 goto out;
 899         if (type == TOMOYO_TYPE_MKDIR)
 900                 tomoyo_add_slash(&buf);
 901         r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
 902         r.param.path_number.operation = type;
 903         r.param.path_number.filename = &buf;
 904         r.param.path_number.number = number;
 905         do {
 906                 tomoyo_check_acl(&r, tomoyo_check_path_number_acl);
 907                 error = tomoyo_audit_path_number_log(&r);
 908         } while (error == TOMOYO_RETRY_REQUEST);
 909         kfree(buf.name);
 910  out:
 911         tomoyo_read_unlock(idx);
 912         if (r.mode != TOMOYO_CONFIG_ENFORCING)
 913                 error = 0;
 914         return error;
 915 }
 916
 917 /**
 918  * tomoyo_check_open_permission - Check permission for "read" and "write".
 919  *
 920  * @domain: Pointer to "struct tomoyo_domain_info".
 921  * @path:   Pointer to "struct path".
 922  * @flag:   Flags for open().
 923  *
 924  * Returns 0 on success, negative value otherwise.
 925  */
 926 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 927                                  struct path *path, const int flag)
 928 {
 929         const u8 acc_mode = ACC_MODE(flag);
 930         int error = -ENOMEM;
 931         struct tomoyo_path_info buf;
 932         struct tomoyo_request_info r;
 933         int idx;
 934
 935         if (!path->mnt ||
 936             (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode)))
 937                 return 0;
 938         buf.name = NULL;
 939         r.mode = TOMOYO_CONFIG_DISABLED;
 940         idx = tomoyo_read_lock();
 941         if (!tomoyo_get_realpath(&buf, path))
 942                 goto out;
 943         error = 0;
 944         /*
 945          * If the filename is specified by "deny_rewrite" keyword,
 946          * we need to check "allow_rewrite" permission when the filename is not
 947          * opened for append mode or the filename is truncated at open time.
 948          */
 949         if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND)
 950             && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE)
 951             != TOMOYO_CONFIG_DISABLED) {
 952                 if (!tomoyo_get_realpath(&buf, path)) {
 953                         error = -ENOMEM;
 954                         goto out;
 955                 }
 956                 if (tomoyo_no_rewrite_file(&buf))
 957                         error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE,
 958                                                        &buf);
 959         }
 960         if (!error && acc_mode &&
 961             tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN)
 962             != TOMOYO_CONFIG_DISABLED) {
 963                 u8 operation;
 964                 if (!buf.name && !tomoyo_get_realpath(&buf, path)) {
 965                         error = -ENOMEM;
 966                         goto out;
 967                 }
 968                 if (acc_mode == (MAY_READ | MAY_WRITE))
 969                         operation = TOMOYO_TYPE_READ_WRITE;
 970                 else if (acc_mode == MAY_READ)
 971                         operation = TOMOYO_TYPE_READ;
 972                 else
 973                         operation = TOMOYO_TYPE_WRITE;
 974                 error = tomoyo_path_permission(&r, operation, &buf);
 975         }
 976  out:
 977         kfree(buf.name);
 978         tomoyo_read_unlock(idx);
 979         if (r.mode != TOMOYO_CONFIG_ENFORCING)
 980                 error = 0;
 981         return error;
 982 }
 983
 984 /**
 985  * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount".
 986  *
 987  * @operation: Type of operation.
 988  * @path:      Pointer to "struct path".
 989  *
 990  * Returns 0 on success, negative value otherwise.
 991  */
 992 int tomoyo_path_perm(const u8 operation, struct path *path)
 993 {
 994         int error = -ENOMEM;
 995         struct tomoyo_path_info buf;
 996         struct tomoyo_request_info r;
 997         int idx;
 998
 999         if (!path->mnt)
1000                 return 0;
1001         if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
1002             == TOMOYO_CONFIG_DISABLED)
1003                 return 0;
1004         buf.name = NULL;
1005         idx = tomoyo_read_lock();
1006         if (!tomoyo_get_realpath(&buf, path))
1007                 goto out;
1008         switch (operation) {
1009         case TOMOYO_TYPE_REWRITE:
1010                 if (!tomoyo_no_rewrite_file(&buf)) {
1011                         error = 0;
1012                         goto out;
1013                 }
1014                 break;
1015         case TOMOYO_TYPE_RMDIR:
1016         case TOMOYO_TYPE_CHROOT:
1017         case TOMOYO_TYPE_UMOUNT:
1018                 tomoyo_add_slash(&buf);
1019                 break;
1020         }
1021         error = tomoyo_path_permission(&r, operation, &buf);
1022  out:
1023         kfree(buf.name);
1024         tomoyo_read_unlock(idx);
1025         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1026                 error = 0;
1027         return error;
1028 }
1029
1030 /**
1031  * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
1032  *
1033  * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
1034  * @path:      Pointer to "struct path".
1035  * @mode:      Create mode.
1036  * @dev:       Device number.
1037  *
1038  * Returns 0 on success, negative value otherwise.
1039  */
1040 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
1041                              const unsigned int mode, unsigned int dev)
1042 {
1043         struct tomoyo_request_info r;
1044         int error = -ENOMEM;
1045         struct tomoyo_path_info buf;
1046         int idx;
1047
1048         if (!path->mnt ||
1049             tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
1050             == TOMOYO_CONFIG_DISABLED)
1051                 return 0;
1052         idx = tomoyo_read_lock();
1053         error = -ENOMEM;
1054         if (tomoyo_get_realpath(&buf, path)) {
1055                 dev = new_decode_dev(dev);
1056                 r.param_type = TOMOYO_TYPE_MKDEV_ACL;
1057                 r.param.mkdev.filename = &buf;
1058                 r.param.mkdev.operation = operation;
1059                 r.param.mkdev.mode = mode;
1060                 r.param.mkdev.major = MAJOR(dev);
1061                 r.param.mkdev.minor = MINOR(dev);
1062                 tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
1063                 error = tomoyo_audit_mkdev_log(&r);
1064                 kfree(buf.name);
1065         }
1066         tomoyo_read_unlock(idx);
1067         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1068                 error = 0;
1069         return error;
1070 }
1071
1072 /**
1073  * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
1074  *
1075  * @operation: Type of operation.
1076  * @path1:      Pointer to "struct path".
1077  * @path2:      Pointer to "struct path".
1078  *
1079  * Returns 0 on success, negative value otherwise.
1080  */
1081 int tomoyo_path2_perm(const u8 operation, struct path *path1,
1082                       struct path *path2)
1083 {
1084         int error = -ENOMEM;
1085         struct tomoyo_path_info buf1;
1086         struct tomoyo_path_info buf2;
1087         struct tomoyo_request_info r;
1088         int idx;
1089
1090         if (!path1->mnt || !path2->mnt ||
1091             tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
1092             == TOMOYO_CONFIG_DISABLED)
1093                 return 0;
1094         buf1.name = NULL;
1095         buf2.name = NULL;
1096         idx = tomoyo_read_lock();
1097         if (!tomoyo_get_realpath(&buf1, path1) ||
1098             !tomoyo_get_realpath(&buf2, path2))
1099                 goto out;
1100         switch (operation) {
1101                 struct dentry *dentry;
1102         case TOMOYO_TYPE_RENAME:
1103         case TOMOYO_TYPE_LINK:
1104                 dentry = path1->dentry;
1105                 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
1106                         break;
1107                 /* fall through */
1108         case TOMOYO_TYPE_PIVOT_ROOT:
1109                 tomoyo_add_slash(&buf1);
1110                 tomoyo_add_slash(&buf2);
1111                 break;
1112         }
1113         r.param_type = TOMOYO_TYPE_PATH2_ACL;
1114         r.param.path2.operation = operation;
1115         r.param.path2.filename1 = &buf1;
1116         r.param.path2.filename2 = &buf2;
1117         do {
1118                 tomoyo_check_acl(&r, tomoyo_check_path2_acl);
1119                 error = tomoyo_audit_path2_log(&r);
1120         } while (error == TOMOYO_RETRY_REQUEST);
1121  out:
1122         kfree(buf1.name);
1123         kfree(buf2.name);
1124         tomoyo_read_unlock(idx);
1125         if (r.mode != TOMOYO_CONFIG_ENFORCING)
1126                 error = 0;
1127         return error;
1128 }
1129
1130 /**
1131  * tomoyo_write_file - Update file related list.
1132  *
1133  * @data:      String to parse.
1134  * @domain:    Pointer to "struct tomoyo_domain_info".
1135  * @is_delete: True if it is a delete request.
1136  *
1137  * Returns 0 on success, negative value otherwise.
1138  *
1139  * Caller holds tomoyo_read_lock().
1140  */
1141 int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain,
1142                       const bool is_delete)
1143 {
1144         char *w[5];
1145         u8 type;
1146         if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
1147                 return -EINVAL;
1148         if (strncmp(w[0], "allow_", 6))
1149                 goto out;
1150         w[0] += 6;
1151         for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
1152                 if (strcmp(w[0], tomoyo_path_keyword[type]))
1153                         continue;
1154                 return tomoyo_update_path_acl(type, w[1], domain, is_delete);
1155         }
1156         if (!w[2][0])
1157                 goto out;
1158         for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
1159                 if (strcmp(w[0], tomoyo_path2_keyword[type]))
1160                         continue;
1161                 return tomoyo_update_path2_acl(type, w[1], w[2], domain,
1162                                                is_delete);
1163         }
1164         for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
1165                 if (strcmp(w[0], tomoyo_path_number_keyword[type]))
1166                         continue;
1167                 return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
1168                                                      is_delete);
1169         }
1170         if (!w[3][0] || !w[4][0])
1171                 goto out;
1172         for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) {
1173                 if (strcmp(w[0], tomoyo_mkdev_keyword[type]))
1174                         continue;
1175                 return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3],
1176                                                w[4], domain, is_delete);
1177         }
1178  out:
1179         return -EINVAL;
1180 }