common.h 40.1 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
/*
 * security/tomoyo/common.h
 *
 * Header file for TOMOYO.
 *
 * Copyright (C) 2005-2011  NTT DATA CORPORATION
 */

#ifndef _SECURITY_TOMOYO_COMMON_H
#define _SECURITY_TOMOYO_COMMON_H

#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/kmod.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/list.h>
#include <linux/cred.h>
#include <linux/poll.h>
#include <linux/binfmts.h>
#include <linux/highmem.h>
#include <linux/net.h>
#include <linux/inet.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/un.h>
#include <net/sock.h>
#include <net/af_unix.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/udp.h>

/********** Constants definitions. **********/

/*
 * TOMOYO uses this hash only when appending a string into the string
 * table. Frequency of appending strings is very low. So we don't need
 * large (e.g. 64k) hash size. 256 will be sufficient.
 */
#define TOMOYO_HASH_BITS  8
#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)

/*
 * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
 * Therefore, we don't need SOCK_MAX.
 */
#define TOMOYO_SOCK_MAX 6

#define TOMOYO_EXEC_TMPSIZE     4096

/* Garbage collector is trying to kfree() this element. */
#define TOMOYO_GC_IN_PROGRESS -1

/* Profile number is an integer between 0 and 255. */
#define TOMOYO_MAX_PROFILES 256

/* Group number is an integer between 0 and 255. */
#define TOMOYO_MAX_ACL_GROUPS 256

/* Index numbers for "struct tomoyo_condition". */
enum tomoyo_conditions_index {
	TOMOYO_TASK_UID,             /* current_uid()   */
	TOMOYO_TASK_EUID,            /* current_euid()  */
	TOMOYO_TASK_SUID,            /* current_suid()  */
	TOMOYO_TASK_FSUID,           /* current_fsuid() */
	TOMOYO_TASK_GID,             /* current_gid()   */
	TOMOYO_TASK_EGID,            /* current_egid()  */
	TOMOYO_TASK_SGID,            /* current_sgid()  */
	TOMOYO_TASK_FSGID,           /* current_fsgid() */
	TOMOYO_TASK_PID,             /* sys_getpid()   */
	TOMOYO_TASK_PPID,            /* sys_getppid()  */
	TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
	TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
	TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
	TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
	TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
	TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
	TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
	TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
	TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
	TOMOYO_MODE_SETUID,          /* S_ISUID */
	TOMOYO_MODE_SETGID,          /* S_ISGID */
	TOMOYO_MODE_STICKY,          /* S_ISVTX */
	TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
	TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
	TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
	TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
	TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
	TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
	TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
	TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
	TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
	TOMOYO_EXEC_REALPATH,
	TOMOYO_SYMLINK_TARGET,
	TOMOYO_PATH1_UID,
	TOMOYO_PATH1_GID,
	TOMOYO_PATH1_INO,
	TOMOYO_PATH1_MAJOR,
	TOMOYO_PATH1_MINOR,
	TOMOYO_PATH1_PERM,
	TOMOYO_PATH1_TYPE,
	TOMOYO_PATH1_DEV_MAJOR,
	TOMOYO_PATH1_DEV_MINOR,
	TOMOYO_PATH2_UID,
	TOMOYO_PATH2_GID,
	TOMOYO_PATH2_INO,
	TOMOYO_PATH2_MAJOR,
	TOMOYO_PATH2_MINOR,
	TOMOYO_PATH2_PERM,
	TOMOYO_PATH2_TYPE,
	TOMOYO_PATH2_DEV_MAJOR,
	TOMOYO_PATH2_DEV_MINOR,
	TOMOYO_PATH1_PARENT_UID,
	TOMOYO_PATH1_PARENT_GID,
	TOMOYO_PATH1_PARENT_INO,
	TOMOYO_PATH1_PARENT_PERM,
	TOMOYO_PATH2_PARENT_UID,
	TOMOYO_PATH2_PARENT_GID,
	TOMOYO_PATH2_PARENT_INO,
	TOMOYO_PATH2_PARENT_PERM,
	TOMOYO_MAX_CONDITION_KEYWORD,
	TOMOYO_NUMBER_UNION,
	TOMOYO_NAME_UNION,
	TOMOYO_ARGV_ENTRY,
	TOMOYO_ENVP_ENTRY,
};


/* Index numbers for stat(). */
enum tomoyo_path_stat_index {
	/* Do not change this order. */
	TOMOYO_PATH1,
	TOMOYO_PATH1_PARENT,
	TOMOYO_PATH2,
	TOMOYO_PATH2_PARENT,
	TOMOYO_MAX_PATH_STAT
};

/* Index numbers for operation mode. */
enum tomoyo_mode_index {
	TOMOYO_CONFIG_DISABLED,
	TOMOYO_CONFIG_LEARNING,
	TOMOYO_CONFIG_PERMISSIVE,
	TOMOYO_CONFIG_ENFORCING,
	TOMOYO_CONFIG_MAX_MODE,
	TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
	TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
	TOMOYO_CONFIG_USE_DEFAULT     = 255,
};

/* Index numbers for entry type. */
enum tomoyo_policy_id {
	TOMOYO_ID_GROUP,
	TOMOYO_ID_ADDRESS_GROUP,
	TOMOYO_ID_PATH_GROUP,
	TOMOYO_ID_NUMBER_GROUP,
	TOMOYO_ID_TRANSITION_CONTROL,
	TOMOYO_ID_AGGREGATOR,
	TOMOYO_ID_MANAGER,
	TOMOYO_ID_CONDITION,
	TOMOYO_ID_NAME,
	TOMOYO_ID_ACL,
	TOMOYO_ID_DOMAIN,
	TOMOYO_MAX_POLICY
};

/* Index numbers for domain's attributes. */
enum tomoyo_domain_info_flags_index {
	/* Quota warnning flag.   */
	TOMOYO_DIF_QUOTA_WARNED,
	/*
	 * This domain was unable to create a new domain at
	 * tomoyo_find_next_domain() because the name of the domain to be
	 * created was too long or it could not allocate memory.
	 * More than one process continued execve() without domain transition.
	 */
	TOMOYO_DIF_TRANSITION_FAILED,
	TOMOYO_MAX_DOMAIN_INFO_FLAGS
};

/* Index numbers for audit type. */
enum tomoyo_grant_log {
	/* Follow profile's configuration. */
	TOMOYO_GRANTLOG_AUTO,
	/* Do not generate grant log. */
	TOMOYO_GRANTLOG_NO,
	/* Generate grant_log. */
	TOMOYO_GRANTLOG_YES,
};

/* Index numbers for group entries. */
enum tomoyo_group_id {
	TOMOYO_PATH_GROUP,
	TOMOYO_NUMBER_GROUP,
	TOMOYO_ADDRESS_GROUP,
	TOMOYO_MAX_GROUP
};

/* Index numbers for type of numeric values. */
enum tomoyo_value_type {
	TOMOYO_VALUE_TYPE_INVALID,
	TOMOYO_VALUE_TYPE_DECIMAL,
	TOMOYO_VALUE_TYPE_OCTAL,
	TOMOYO_VALUE_TYPE_HEXADECIMAL,
};

/* Index numbers for domain transition control keywords. */
enum tomoyo_transition_type {
	/* Do not change this order, */
	TOMOYO_TRANSITION_CONTROL_NO_RESET,
	TOMOYO_TRANSITION_CONTROL_RESET,
	TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
	TOMOYO_TRANSITION_CONTROL_INITIALIZE,
	TOMOYO_TRANSITION_CONTROL_NO_KEEP,
	TOMOYO_TRANSITION_CONTROL_KEEP,
	TOMOYO_MAX_TRANSITION_TYPE
};

/* Index numbers for Access Controls. */
enum tomoyo_acl_entry_type_index {
	TOMOYO_TYPE_PATH_ACL,
	TOMOYO_TYPE_PATH2_ACL,
	TOMOYO_TYPE_PATH_NUMBER_ACL,
	TOMOYO_TYPE_MKDEV_ACL,
	TOMOYO_TYPE_MOUNT_ACL,
	TOMOYO_TYPE_INET_ACL,
	TOMOYO_TYPE_UNIX_ACL,
	TOMOYO_TYPE_ENV_ACL,
	TOMOYO_TYPE_MANUAL_TASK_ACL,
};

/* Index numbers for access controls with one pathname. */
enum tomoyo_path_acl_index {
	TOMOYO_TYPE_EXECUTE,
	TOMOYO_TYPE_READ,
	TOMOYO_TYPE_WRITE,
	TOMOYO_TYPE_APPEND,
	TOMOYO_TYPE_UNLINK,
	TOMOYO_TYPE_GETATTR,
	TOMOYO_TYPE_RMDIR,
	TOMOYO_TYPE_TRUNCATE,
	TOMOYO_TYPE_SYMLINK,
	TOMOYO_TYPE_CHROOT,
	TOMOYO_TYPE_UMOUNT,
	TOMOYO_MAX_PATH_OPERATION
};

/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
enum tomoyo_memory_stat_type {
	TOMOYO_MEMORY_POLICY,
	TOMOYO_MEMORY_AUDIT,
	TOMOYO_MEMORY_QUERY,
	TOMOYO_MAX_MEMORY_STAT
};

enum tomoyo_mkdev_acl_index {
	TOMOYO_TYPE_MKBLOCK,
	TOMOYO_TYPE_MKCHAR,
	TOMOYO_MAX_MKDEV_OPERATION
};

/* Index numbers for socket operations. */
enum tomoyo_network_acl_index {
	TOMOYO_NETWORK_BIND,    /* bind() operation. */
	TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
	TOMOYO_NETWORK_CONNECT, /* connect() operation. */
	TOMOYO_NETWORK_SEND,    /* send() operation. */
	TOMOYO_MAX_NETWORK_OPERATION
};

/* Index numbers for access controls with two pathnames. */
enum tomoyo_path2_acl_index {
	TOMOYO_TYPE_LINK,
	TOMOYO_TYPE_RENAME,
	TOMOYO_TYPE_PIVOT_ROOT,
	TOMOYO_MAX_PATH2_OPERATION
};

/* Index numbers for access controls with one pathname and one number. */
enum tomoyo_path_number_acl_index {
	TOMOYO_TYPE_CREATE,
	TOMOYO_TYPE_MKDIR,
	TOMOYO_TYPE_MKFIFO,
	TOMOYO_TYPE_MKSOCK,
	TOMOYO_TYPE_IOCTL,
	TOMOYO_TYPE_CHMOD,
	TOMOYO_TYPE_CHOWN,
	TOMOYO_TYPE_CHGRP,
	TOMOYO_MAX_PATH_NUMBER_OPERATION
};

/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
enum tomoyo_securityfs_interface_index {
	TOMOYO_DOMAINPOLICY,
	TOMOYO_EXCEPTIONPOLICY,
	TOMOYO_PROCESS_STATUS,
	TOMOYO_STAT,
	TOMOYO_AUDIT,
	TOMOYO_VERSION,
	TOMOYO_PROFILE,
	TOMOYO_QUERY,
	TOMOYO_MANAGER
};

/* Index numbers for special mount operations. */
enum tomoyo_special_mount {
	TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
	TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
	TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
	TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
	TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
	TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
	TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
	TOMOYO_MAX_SPECIAL_MOUNT
};

/* Index numbers for functionality. */
enum tomoyo_mac_index {
	TOMOYO_MAC_FILE_EXECUTE,
	TOMOYO_MAC_FILE_OPEN,
	TOMOYO_MAC_FILE_CREATE,
	TOMOYO_MAC_FILE_UNLINK,
	TOMOYO_MAC_FILE_GETATTR,
	TOMOYO_MAC_FILE_MKDIR,
	TOMOYO_MAC_FILE_RMDIR,
	TOMOYO_MAC_FILE_MKFIFO,
	TOMOYO_MAC_FILE_MKSOCK,
	TOMOYO_MAC_FILE_TRUNCATE,
	TOMOYO_MAC_FILE_SYMLINK,
	TOMOYO_MAC_FILE_MKBLOCK,
	TOMOYO_MAC_FILE_MKCHAR,
	TOMOYO_MAC_FILE_LINK,
	TOMOYO_MAC_FILE_RENAME,
	TOMOYO_MAC_FILE_CHMOD,
	TOMOYO_MAC_FILE_CHOWN,
	TOMOYO_MAC_FILE_CHGRP,
	TOMOYO_MAC_FILE_IOCTL,
	TOMOYO_MAC_FILE_CHROOT,
	TOMOYO_MAC_FILE_MOUNT,
	TOMOYO_MAC_FILE_UMOUNT,
	TOMOYO_MAC_FILE_PIVOT_ROOT,
	TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
	TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
	TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
	TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
	TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
	TOMOYO_MAC_NETWORK_INET_RAW_BIND,
	TOMOYO_MAC_NETWORK_INET_RAW_SEND,
	TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
	TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
	TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
	TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
	TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
	TOMOYO_MAC_ENVIRON,
	TOMOYO_MAX_MAC_INDEX
};

/* Index numbers for category of functionality. */
enum tomoyo_mac_category_index {
	TOMOYO_MAC_CATEGORY_FILE,
	TOMOYO_MAC_CATEGORY_NETWORK,
	TOMOYO_MAC_CATEGORY_MISC,
	TOMOYO_MAX_MAC_CATEGORY_INDEX
};

/*
 * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 * occurred in enforcing mode and the userspace daemon decided to retry.
 *
 * We must choose a positive value in order to distinguish "granted" (which is
 * 0) and "rejected" (which is a negative value) and "retry".
 */
#define TOMOYO_RETRY_REQUEST 1

/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
enum tomoyo_policy_stat_type {
	/* Do not change this order. */
	TOMOYO_STAT_POLICY_UPDATES,
	TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
	TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
	TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
	TOMOYO_MAX_POLICY_STAT
};

/* Index numbers for profile's PREFERENCE values. */
enum tomoyo_pref_index {
	TOMOYO_PREF_MAX_AUDIT_LOG,
	TOMOYO_PREF_MAX_LEARNING_ENTRY,
	TOMOYO_MAX_PREF
};

/********** Structure definitions. **********/

/* Common header for holding ACL entries. */
struct tomoyo_acl_head {
	struct list_head list;
	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
} __packed;

/* Common header for shared entries. */
struct tomoyo_shared_acl_head {
	struct list_head list;
	atomic_t users;
} __packed;

struct tomoyo_policy_namespace;

/* Structure for request info. */
struct tomoyo_request_info {
	/*
	 * For holding parameters specific to operations which deal files.
	 * NULL if not dealing files.
	 */
	struct tomoyo_obj_info *obj;
	/*
	 * For holding parameters specific to execve() request.
	 * NULL if not dealing do_execve().
	 */
	struct tomoyo_execve *ee;
	struct tomoyo_domain_info *domain;
	/* For holding parameters. */
	union {
		struct {
			const struct tomoyo_path_info *filename;
			/* For using wildcards at tomoyo_find_next_domain(). */
			const struct tomoyo_path_info *matched_path;
			/* One of values in "enum tomoyo_path_acl_index". */
			u8 operation;
		} path;
		struct {
			const struct tomoyo_path_info *filename1;
			const struct tomoyo_path_info *filename2;
			/* One of values in "enum tomoyo_path2_acl_index". */
			u8 operation;
		} path2;
		struct {
			const struct tomoyo_path_info *filename;
			unsigned int mode;
			unsigned int major;
			unsigned int minor;
			/* One of values in "enum tomoyo_mkdev_acl_index". */
			u8 operation;
		} mkdev;
		struct {
			const struct tomoyo_path_info *filename;
			unsigned long number;
			/*
			 * One of values in
			 * "enum tomoyo_path_number_acl_index".
			 */
			u8 operation;
		} path_number;
		struct {
			const struct tomoyo_path_info *name;
		} environ;
		struct {
			const __be32 *address;
			u16 port;
			/* One of values smaller than TOMOYO_SOCK_MAX. */
			u8 protocol;
			/* One of values in "enum tomoyo_network_acl_index". */
			u8 operation;
			bool is_ipv6;
		} inet_network;
		struct {
			const struct tomoyo_path_info *address;
			/* One of values smaller than TOMOYO_SOCK_MAX. */
			u8 protocol;
			/* One of values in "enum tomoyo_network_acl_index". */
			u8 operation;
		} unix_network;
		struct {
			const struct tomoyo_path_info *type;
			const struct tomoyo_path_info *dir;
			const struct tomoyo_path_info *dev;
			unsigned long flags;
			int need_dev;
		} mount;
		struct {
			const struct tomoyo_path_info *domainname;
		} task;
	} param;
	struct tomoyo_acl_info *matched_acl;
	u8 param_type;
	bool granted;
	u8 retry;
	u8 profile;
	u8 mode; /* One of tomoyo_mode_index . */
	u8 type;
};

/* Structure for holding a token. */
struct tomoyo_path_info {
	const char *name;
	u32 hash;          /* = full_name_hash(name, strlen(name)) */
	u16 const_len;     /* = tomoyo_const_part_length(name)     */
	bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
	bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
};

/* Structure for holding string data. */
struct tomoyo_name {
	struct tomoyo_shared_acl_head head;
	struct tomoyo_path_info entry;
};

/* Structure for holding a word. */
struct tomoyo_name_union {
	/* Either @filename or @group is NULL. */
	const struct tomoyo_path_info *filename;
	struct tomoyo_group *group;
};

/* Structure for holding a number. */
struct tomoyo_number_union {
	unsigned long values[2];
	struct tomoyo_group *group; /* Maybe NULL. */
	/* One of values in "enum tomoyo_value_type". */
	u8 value_type[2];
};

/* Structure for holding an IP address. */
struct tomoyo_ipaddr_union {
	struct in6_addr ip[2]; /* Big endian. */
	struct tomoyo_group *group; /* Pointer to address group. */
	bool is_ipv6; /* Valid only if @group == NULL. */
};

/* Structure for "path_group"/"number_group"/"address_group" directive. */
struct tomoyo_group {
	struct tomoyo_shared_acl_head head;
	const struct tomoyo_path_info *group_name;
	struct list_head member_list;
};

/* Structure for "path_group" directive. */
struct tomoyo_path_group {
	struct tomoyo_acl_head head;
	const struct tomoyo_path_info *member_name;
};

/* Structure for "number_group" directive. */
struct tomoyo_number_group {
	struct tomoyo_acl_head head;
	struct tomoyo_number_union number;
};

/* Structure for "address_group" directive. */
struct tomoyo_address_group {
	struct tomoyo_acl_head head;
	/* Structure for holding an IP address. */
	struct tomoyo_ipaddr_union address;
};

/* Subset of "struct stat". Used by conditional ACL and audit logs. */
struct tomoyo_mini_stat {
	kuid_t uid;
	kgid_t gid;
	ino_t ino;
	umode_t mode;
	dev_t dev;
	dev_t rdev;
};

/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
struct tomoyo_page_dump {
	struct page *page;    /* Previously dumped page. */
	char *data;           /* Contents of "page". Size is PAGE_SIZE. */
};

/* Structure for attribute checks in addition to pathname checks. */
struct tomoyo_obj_info {
	/*
	 * True if tomoyo_get_attributes() was already called, false otherwise.
	 */
	bool validate_done;
	/* True if @stat[] is valid. */
	bool stat_valid[TOMOYO_MAX_PATH_STAT];
	/* First pathname. Initialized with { NULL, NULL } if no path. */
	struct path path1;
	/* Second pathname. Initialized with { NULL, NULL } if no path. */
	struct path path2;
	/*
	 * Information on @path1, @path1's parent directory, @path2, @path2's
	 * parent directory.
	 */
	struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
	/*
	 * Content of symbolic link to be created. NULL for operations other
	 * than symlink().
	 */
	struct tomoyo_path_info *symlink_target;
};

/* Structure for argv[]. */
struct tomoyo_argv {
	unsigned long index;
	const struct tomoyo_path_info *value;
	bool is_not;
};

/* Structure for envp[]. */
struct tomoyo_envp {
	const struct tomoyo_path_info *name;
	const struct tomoyo_path_info *value;
	bool is_not;
};

/* Structure for execve() operation. */
struct tomoyo_execve {
	struct tomoyo_request_info r;
	struct tomoyo_obj_info obj;
	struct linux_binprm *bprm;
	const struct tomoyo_path_info *transition;
	/* For dumping argv[] and envp[]. */
	struct tomoyo_page_dump dump;
	/* For temporary use. */
	char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
};

/* Structure for entries which follows "struct tomoyo_condition". */
struct tomoyo_condition_element {
	/*
	 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
	 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
	 * of the array of this struct.
	 */
	u8 left;
	/*
	 * Right hand operand. A "struct tomoyo_number_union" for
	 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
	 * TOMOYO_NAME_UNION is attached to the tail of the array of this
	 * struct.
	 */
	u8 right;
	/* Equation operator. True if equals or overlaps, false otherwise. */
	bool equals;
};

/* Structure for optional arguments. */
struct tomoyo_condition {
	struct tomoyo_shared_acl_head head;
	u32 size; /* Memory size allocated for this entry. */
	u16 condc; /* Number of conditions in this struct. */
	u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
	u16 names_count; /* Number of "struct tomoyo_name_union names". */
	u16 argc; /* Number of "struct tomoyo_argv". */
	u16 envc; /* Number of "struct tomoyo_envp". */
	u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
	const struct tomoyo_path_info *transit; /* Maybe NULL. */
	/*
	 * struct tomoyo_condition_element condition[condc];
	 * struct tomoyo_number_union values[numbers_count];
	 * struct tomoyo_name_union names[names_count];
	 * struct tomoyo_argv argv[argc];
	 * struct tomoyo_envp envp[envc];
	 */
};

/* Common header for individual entries. */
struct tomoyo_acl_info {
	struct list_head list;
	struct tomoyo_condition *cond; /* Maybe NULL. */
	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
	u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
} __packed;

/* Structure for domain information. */
struct tomoyo_domain_info {
	struct list_head list;
	struct list_head acl_info_list;
	/* Name of this domain. Never NULL.          */
	const struct tomoyo_path_info *domainname;
	/* Namespace for this domain. Never NULL. */
	struct tomoyo_policy_namespace *ns;
	u8 profile;        /* Profile number to use. */
	u8 group;          /* Group number to use.   */
	bool is_deleted;   /* Delete flag.           */
	bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
	atomic_t users; /* Number of referring credentials. */
};

/*
 * Structure for "task manual_domain_transition" directive.
 */
struct tomoyo_task_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
	/* Pointer to domainname. */
	const struct tomoyo_path_info *domainname;
};

/*
 * Structure for "file execute", "file read", "file write", "file append",
 * "file unlink", "file getattr", "file rmdir", "file truncate",
 * "file symlink", "file chroot" and "file unmount" directive.
 */
struct tomoyo_path_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
	u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
	struct tomoyo_name_union name;
};

/*
 * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 */
struct tomoyo_path_number_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
	/* Bitmask of values in "enum tomoyo_path_number_acl_index". */
	u8 perm;
	struct tomoyo_name_union name;
	struct tomoyo_number_union number;
};

/* Structure for "file mkblock" and "file mkchar" directive. */
struct tomoyo_mkdev_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
	u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
	struct tomoyo_name_union name;
	struct tomoyo_number_union mode;
	struct tomoyo_number_union major;
	struct tomoyo_number_union minor;
};

/*
 * Structure for "file rename", "file link" and "file pivot_root" directive.
 */
struct tomoyo_path2_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
	u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
	struct tomoyo_name_union name1;
	struct tomoyo_name_union name2;
};

/* Structure for "file mount" directive. */
struct tomoyo_mount_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
	struct tomoyo_name_union dev_name;
	struct tomoyo_name_union dir_name;
	struct tomoyo_name_union fs_type;
	struct tomoyo_number_union flags;
};

/* Structure for "misc env" directive in domain policy. */
struct tomoyo_env_acl {
	struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
	const struct tomoyo_path_info *env; /* environment variable */
};

/* Structure for "network inet" directive. */
struct tomoyo_inet_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
	u8 protocol;
	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
	struct tomoyo_ipaddr_union address;
	struct tomoyo_number_union port;
};

/* Structure for "network unix" directive. */
struct tomoyo_unix_acl {
	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
	u8 protocol;
	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
	struct tomoyo_name_union name;
};

/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
struct tomoyo_acl_param {
	char *data;
	struct list_head *list;
	struct tomoyo_policy_namespace *ns;
	bool is_delete;
};

#define TOMOYO_MAX_IO_READ_QUEUE 64

/*
 * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 * interfaces.
 */
struct tomoyo_io_buffer {
	void (*read) (struct tomoyo_io_buffer *);
	int (*write) (struct tomoyo_io_buffer *);
	unsigned int (*poll) (struct file *file, poll_table *wait);
	/* Exclusive lock for this structure.   */
	struct mutex io_sem;
	char __user *read_user_buf;
	size_t read_user_buf_avail;
	struct {
		struct list_head *ns;
		struct list_head *domain;
		struct list_head *group;
		struct list_head *acl;
		size_t avail;
		unsigned int step;
		unsigned int query_index;
		u16 index;
		u16 cond_index;
		u8 acl_group_index;
		u8 cond_step;
		u8 bit;
		u8 w_pos;
		bool eof;
		bool print_this_domain_only;
		bool print_transition_related_only;
		bool print_cond_part;
		const char *w[TOMOYO_MAX_IO_READ_QUEUE];
	} r;
	struct {
		struct tomoyo_policy_namespace *ns;
		/* The position currently writing to.   */
		struct tomoyo_domain_info *domain;
		/* Bytes available for writing.         */
		size_t avail;
		bool is_delete;
	} w;
	/* Buffer for reading.                  */
	char *read_buf;
	/* Size of read buffer.                 */
	size_t readbuf_size;
	/* Buffer for writing.                  */
	char *write_buf;
	/* Size of write buffer.                */
	size_t writebuf_size;
	/* Type of this interface.              */
	enum tomoyo_securityfs_interface_index type;
	/* Users counter protected by tomoyo_io_buffer_list_lock. */
	u8 users;
	/* List for telling GC not to kfree() elements. */
	struct list_head list;
};

/*
 * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 * "no_keep_domain" keyword.
 */
struct tomoyo_transition_control {
	struct tomoyo_acl_head head;
	u8 type; /* One of values in "enum tomoyo_transition_type".  */
	/* True if the domainname is tomoyo_get_last_name(). */
	bool is_last_name;
	const struct tomoyo_path_info *domainname; /* Maybe NULL */
	const struct tomoyo_path_info *program;    /* Maybe NULL */
};

/* Structure for "aggregator" keyword. */
struct tomoyo_aggregator {
	struct tomoyo_acl_head head;
	const struct tomoyo_path_info *original_name;
	const struct tomoyo_path_info *aggregated_name;
};

/* Structure for policy manager. */
struct tomoyo_manager {
	struct tomoyo_acl_head head;
	/* A path to program or a domainname. */
	const struct tomoyo_path_info *manager;
};

struct tomoyo_preference {
	unsigned int learning_max_entry;
	bool enforcing_verbose;
	bool learning_verbose;
	bool permissive_verbose;
};

/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
struct tomoyo_profile {
	const struct tomoyo_path_info *comment;
	struct tomoyo_preference *learning;
	struct tomoyo_preference *permissive;
	struct tomoyo_preference *enforcing;
	struct tomoyo_preference preference;
	u8 default_config;
	u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
	unsigned int pref[TOMOYO_MAX_PREF];
};

/* Structure for representing YYYY/MM/DD hh/mm/ss. */
struct tomoyo_time {
	u16 year;
	u8 month;
	u8 day;
	u8 hour;
	u8 min;
	u8 sec;
};

/* Structure for policy namespace. */
struct tomoyo_policy_namespace {
	/* Profile table. Memory is allocated as needed. */
	struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
	/* List of "struct tomoyo_group". */
	struct list_head group_list[TOMOYO_MAX_GROUP];
	/* List of policy. */
	struct list_head policy_list[TOMOYO_MAX_POLICY];
	/* The global ACL referred by "use_group" keyword. */
	struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
	/* List for connecting to tomoyo_namespace_list list. */
	struct list_head namespace_list;
	/* Profile version. Currently only 20110903 is defined. */
	unsigned int profile_version;
	/* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
	const char *name;
};

/********** Function prototypes. **********/

bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
				  const struct tomoyo_group *group);
bool tomoyo_compare_number_union(const unsigned long value,
				 const struct tomoyo_number_union *ptr);
bool tomoyo_condition(struct tomoyo_request_info *r,
		      const struct tomoyo_condition *cond);
bool tomoyo_correct_domain(const unsigned char *domainname);
bool tomoyo_correct_path(const char *filename);
bool tomoyo_correct_word(const char *string);
bool tomoyo_domain_def(const unsigned char *buffer);
bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
		      struct tomoyo_page_dump *dump);
bool tomoyo_memory_ok(void *ptr);
bool tomoyo_number_matches_group(const unsigned long min,
				 const unsigned long max,
				 const struct tomoyo_group *group);
bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
			       struct tomoyo_ipaddr_union *ptr);
bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
			     struct tomoyo_name_union *ptr);
bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
			       struct tomoyo_number_union *ptr);
bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
				 const struct tomoyo_path_info *pattern);
bool tomoyo_permstr(const char *string, const char *keyword);
bool tomoyo_str_starts(char **src, const char *find);
char *tomoyo_encode(const char *str);
char *tomoyo_encode2(const char *str, int str_len);
char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
		      va_list args);
char *tomoyo_read_token(struct tomoyo_acl_param *param);
char *tomoyo_realpath_from_path(struct path *path);
char *tomoyo_realpath_nofollow(const char *pathname);
const char *tomoyo_get_exe(void);
const char *tomoyo_yesno(const unsigned int value);
const struct tomoyo_path_info *tomoyo_compare_name_union
(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
const struct tomoyo_path_info *tomoyo_get_domainname
(struct tomoyo_acl_param *param);
const struct tomoyo_path_info *tomoyo_get_name(const char *name);
const struct tomoyo_path_info *tomoyo_path_matches_group
(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
				 struct path *path, const int flag);
void tomoyo_close_control(struct tomoyo_io_buffer *head);
int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
int tomoyo_execute_permission(struct tomoyo_request_info *r,
			      const struct tomoyo_path_info *filename);
int tomoyo_find_next_domain(struct linux_binprm *bprm);
int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
		    const u8 index);
int tomoyo_init_request_info(struct tomoyo_request_info *r,
			     struct tomoyo_domain_info *domain,
			     const u8 index);
int tomoyo_mkdev_perm(const u8 operation, struct path *path,
		      const unsigned int mode, unsigned int dev);
int tomoyo_mount_permission(const char *dev_name, struct path *path,
			    const char *type, unsigned long flags,
			    void *data_page);
int tomoyo_open_control(const u8 type, struct file *file);
int tomoyo_path2_perm(const u8 operation, struct path *path1,
		      struct path *path2);
int tomoyo_path_number_perm(const u8 operation, struct path *path,
			    unsigned long number);
int tomoyo_path_perm(const u8 operation, struct path *path,
		     const char *target);
unsigned int tomoyo_poll_control(struct file *file, poll_table *wait);
unsigned int tomoyo_poll_log(struct file *file, poll_table *wait);
int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
				  int addr_len);
int tomoyo_socket_connect_permission(struct socket *sock,
				     struct sockaddr *addr, int addr_len);
int tomoyo_socket_listen_permission(struct socket *sock);
int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
				     int size);
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
	__printf(2, 3);
int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
			 struct tomoyo_acl_param *param,
			 bool (*check_duplicate)
			 (const struct tomoyo_acl_info *,
			  const struct tomoyo_acl_info *),
			 bool (*merge_duplicate)
			 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
			  const bool));
int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
			 struct tomoyo_acl_param *param,
			 bool (*check_duplicate)
			 (const struct tomoyo_acl_head *,
			  const struct tomoyo_acl_head *));
int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
int tomoyo_write_file(struct tomoyo_acl_param *param);
int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
int tomoyo_write_misc(struct tomoyo_acl_param *param);
int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
				    const u8 type);
int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
			    const int buffer_len);
ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
			     const char __user *buffer, const int buffer_len);
struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
						const bool transit);
struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
				      const u8 idx);
struct tomoyo_policy_namespace *tomoyo_assign_namespace
(const char *domainname);
struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
				      const u8 profile);
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
				const u8 index);
u8 tomoyo_parse_ulong(unsigned long *result, char **str);
void *tomoyo_commit_ok(void *data, const unsigned int size);
void __init tomoyo_load_builtin_policy(void);
void __init tomoyo_mm_init(void);
void tomoyo_check_acl(struct tomoyo_request_info *r,
		      bool (*check_entry) (struct tomoyo_request_info *,
					   const struct tomoyo_acl_info *));
void tomoyo_check_profile(void);
void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
void tomoyo_del_condition(struct list_head *element);
void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
void tomoyo_load_policy(const char *filename);
void tomoyo_normalize_line(unsigned char *buffer);
void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
void tomoyo_print_ip(char *buf, const unsigned int size,
		     const struct tomoyo_ipaddr_union *ptr);
void tomoyo_print_ulong(char *buffer, const int buffer_len,
			const unsigned long value, const u8 type);
void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
void tomoyo_read_log(struct tomoyo_io_buffer *head);
void tomoyo_update_stat(const u8 index);
void tomoyo_warn_oom(const char *function);
void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
	__printf(2, 3);
void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
		       va_list args);

/********** External variable definitions. **********/

extern bool tomoyo_policy_loaded;
extern const char * const tomoyo_condition_keyword
[TOMOYO_MAX_CONDITION_KEYWORD];
extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
					      + TOMOYO_MAX_MAC_CATEGORY_INDEX];
extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
extern struct list_head tomoyo_condition_list;
extern struct list_head tomoyo_domain_list;
extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
extern struct list_head tomoyo_namespace_list;
extern struct mutex tomoyo_policy_lock;
extern struct srcu_struct tomoyo_ss;
extern struct tomoyo_domain_info tomoyo_kernel_domain;
extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];

/********** Inlined functions. **********/

/**
 * tomoyo_read_lock - Take lock for protecting policy.
 *
 * Returns index number for tomoyo_read_unlock().
 */
static inline int tomoyo_read_lock(void)
{
	return srcu_read_lock(&tomoyo_ss);
}

/**
 * tomoyo_read_unlock - Release lock for protecting policy.
 *
 * @idx: Index number returned by tomoyo_read_lock().
 *
 * Returns nothing.
 */
static inline void tomoyo_read_unlock(int idx)
{
	srcu_read_unlock(&tomoyo_ss, idx);
}

/**
 * tomoyo_sys_getppid - Copy of getppid().
 *
 * Returns parent process's PID.
 *
 * Alpha does not have getppid() defined. To be able to build this module on
 * Alpha, I have to copy getppid() from kernel/timer.c.
 */
static inline pid_t tomoyo_sys_getppid(void)
{
	pid_t pid;
	rcu_read_lock();
	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
	rcu_read_unlock();
	return pid;
}

/**
 * tomoyo_sys_getpid - Copy of getpid().
 *
 * Returns current thread's PID.
 *
 * Alpha does not have getpid() defined. To be able to build this module on
 * Alpha, I have to copy getpid() from kernel/timer.c.
 */
static inline pid_t tomoyo_sys_getpid(void)
{
	return task_tgid_vnr(current);
}

/**
 * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
 *
 * @a: Pointer to "struct tomoyo_path_info".
 * @b: Pointer to "struct tomoyo_path_info".
 *
 * Returns true if @a == @b, false otherwise.
 */
static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
				  const struct tomoyo_path_info *b)
{
	return a->hash != b->hash || strcmp(a->name, b->name);
}

/**
 * tomoyo_put_name - Drop reference on "struct tomoyo_name".
 *
 * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
 *
 * Returns nothing.
 */
static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
{
	if (name) {
		struct tomoyo_name *ptr =
			container_of(name, typeof(*ptr), entry);
		atomic_dec(&ptr->head.users);
	}
}

/**
 * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
 *
 * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
 *
 * Returns nothing.
 */
static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
{
	if (cond)
		atomic_dec(&cond->head.users);
}

/**
 * tomoyo_put_group - Drop reference on "struct tomoyo_group".
 *
 * @group: Pointer to "struct tomoyo_group". Maybe NULL.
 *
 * Returns nothing.
 */
static inline void tomoyo_put_group(struct tomoyo_group *group)
{
	if (group)
		atomic_dec(&group->head.users);
}

/**
 * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
 *
 * Returns pointer to "struct tomoyo_domain_info" for current thread.
 */
static inline struct tomoyo_domain_info *tomoyo_domain(void)
{
	return current_cred()->security;
}

/**
 * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
 *
 * @task: Pointer to "struct task_struct".
 *
 * Returns pointer to "struct tomoyo_security" for specified thread.
 */
static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
							    *task)
{
	return task_cred_xxx(task, security);
}

/**
 * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
 *
 * @a: Pointer to "struct tomoyo_name_union".
 * @b: Pointer to "struct tomoyo_name_union".
 *
 * Returns true if @a == @b, false otherwise.
 */
static inline bool tomoyo_same_name_union
(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
{
	return a->filename == b->filename && a->group == b->group;
}

/**
 * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
 *
 * @a: Pointer to "struct tomoyo_number_union".
 * @b: Pointer to "struct tomoyo_number_union".
 *
 * Returns true if @a == @b, false otherwise.
 */
static inline bool tomoyo_same_number_union
(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
{
	return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
		a->group == b->group && a->value_type[0] == b->value_type[0] &&
		a->value_type[1] == b->value_type[1];
}

/**
 * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
 *
 * @a: Pointer to "struct tomoyo_ipaddr_union".
 * @b: Pointer to "struct tomoyo_ipaddr_union".
 *
 * Returns true if @a == @b, false otherwise.
 */
static inline bool tomoyo_same_ipaddr_union
(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
{
	return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
		a->is_ipv6 == b->is_ipv6;
}

/**
 * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
 *
 * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
 */
static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
{
	return tomoyo_domain()->ns;
}

#if defined(CONFIG_SLOB)

/**
 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 *
 * @size: Size to be rounded up.
 *
 * Returns @size.
 *
 * Since SLOB does not round up, this function simply returns @size.
 */
static inline int tomoyo_round2(size_t size)
{
	return size;
}

#else

/**
 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 *
 * @size: Size to be rounded up.
 *
 * Returns rounded size.
 *
 * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
 * (e.g.) 128 bytes.
 */
static inline int tomoyo_round2(size_t size)
{
#if PAGE_SIZE == 4096
	size_t bsize = 32;
#else
	size_t bsize = 64;
#endif
	if (!size)
		return 0;
	while (size > bsize)
		bsize <<= 1;
	return bsize;
}

#endif

/**
 * list_for_each_cookie - iterate over a list with cookie.
 * @pos:        the &struct list_head to use as a loop cursor.
 * @head:       the head for your list.
 */
#define list_for_each_cookie(pos, head)					\
	if (!pos)							\
		pos =  srcu_dereference((head)->next, &tomoyo_ss);	\
	for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))

#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */