security/tomoyo/common.h

   1 /*
   2  * security/tomoyo/common.h
   3  *
   4  * Header file for TOMOYO.
   5  *
   6  * Copyright (C) 2005-2011  NTT DATA CORPORATION
   7  */
   8
   9 #ifndef _SECURITY_TOMOYO_COMMON_H
  10 #define _SECURITY_TOMOYO_COMMON_H
  11
  12 #include <linux/ctype.h>
  13 #include <linux/string.h>
  14 #include <linux/mm.h>
  15 #include <linux/file.h>
  16 #include <linux/kmod.h>
  17 #include <linux/fs.h>
  18 #include <linux/sched.h>
  19 #include <linux/namei.h>
  20 #include <linux/mount.h>
  21 #include <linux/list.h>
  22 #include <linux/cred.h>
  23 #include <linux/poll.h>
  24 #include <linux/binfmts.h>
  25 #include <linux/highmem.h>
  26 #include <linux/net.h>
  27 #include <linux/inet.h>
  28 #include <linux/in.h>
  29 #include <linux/in6.h>
  30 #include <linux/un.h>
  31 #include <net/sock.h>
  32 #include <net/af_unix.h>
  33 #include <net/ip.h>
  34 #include <net/ipv6.h>
  35 #include <net/udp.h>
  36
  37 /********** Constants definitions. **********/
  38
  39 /*
  40  * TOMOYO uses this hash only when appending a string into the string
  41  * table. Frequency of appending strings is very low. So we don't need
  42  * large (e.g. 64k) hash size. 256 will be sufficient.
  43  */
  44 #define TOMOYO_HASH_BITS  8
  45 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  46
  47 /*
  48  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
  49  * Therefore, we don't need SOCK_MAX.
  50  */
  51 #define TOMOYO_SOCK_MAX 6
  52
  53 #define TOMOYO_EXEC_TMPSIZE     4096
  54
  55 /* Garbage collector is trying to kfree() this element. */
  56 #define TOMOYO_GC_IN_PROGRESS -1
  57
  58 /* Profile number is an integer between 0 and 255. */
  59 #define TOMOYO_MAX_PROFILES 256
  60
  61 /* Group number is an integer between 0 and 255. */
  62 #define TOMOYO_MAX_ACL_GROUPS 256
  63
  64 /* Index numbers for "struct tomoyo_condition". */
  65 enum tomoyo_conditions_index {
  66         TOMOYO_TASK_UID,             /* current_uid()   */
  67         TOMOYO_TASK_EUID,            /* current_euid()  */
  68         TOMOYO_TASK_SUID,            /* current_suid()  */
  69         TOMOYO_TASK_FSUID,           /* current_fsuid() */
  70         TOMOYO_TASK_GID,             /* current_gid()   */
  71         TOMOYO_TASK_EGID,            /* current_egid()  */
  72         TOMOYO_TASK_SGID,            /* current_sgid()  */
  73         TOMOYO_TASK_FSGID,           /* current_fsgid() */
  74         TOMOYO_TASK_PID,             /* sys_getpid()   */
  75         TOMOYO_TASK_PPID,            /* sys_getppid()  */
  76         TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
  77         TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
  78         TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
  79         TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
  80         TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
  81         TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
  82         TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
  83         TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
  84         TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
  85         TOMOYO_MODE_SETUID,          /* S_ISUID */
  86         TOMOYO_MODE_SETGID,          /* S_ISGID */
  87         TOMOYO_MODE_STICKY,          /* S_ISVTX */
  88         TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
  89         TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
  90         TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
  91         TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
  92         TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
  93         TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
  94         TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
  95         TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
  96         TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
  97         TOMOYO_EXEC_REALPATH,
  98         TOMOYO_SYMLINK_TARGET,
  99         TOMOYO_PATH1_UID,
 100         TOMOYO_PATH1_GID,
 101         TOMOYO_PATH1_INO,
 102         TOMOYO_PATH1_MAJOR,
 103         TOMOYO_PATH1_MINOR,
 104         TOMOYO_PATH1_PERM,
 105         TOMOYO_PATH1_TYPE,
 106         TOMOYO_PATH1_DEV_MAJOR,
 107         TOMOYO_PATH1_DEV_MINOR,
 108         TOMOYO_PATH2_UID,
 109         TOMOYO_PATH2_GID,
 110         TOMOYO_PATH2_INO,
 111         TOMOYO_PATH2_MAJOR,
 112         TOMOYO_PATH2_MINOR,
 113         TOMOYO_PATH2_PERM,
 114         TOMOYO_PATH2_TYPE,
 115         TOMOYO_PATH2_DEV_MAJOR,
 116         TOMOYO_PATH2_DEV_MINOR,
 117         TOMOYO_PATH1_PARENT_UID,
 118         TOMOYO_PATH1_PARENT_GID,
 119         TOMOYO_PATH1_PARENT_INO,
 120         TOMOYO_PATH1_PARENT_PERM,
 121         TOMOYO_PATH2_PARENT_UID,
 122         TOMOYO_PATH2_PARENT_GID,
 123         TOMOYO_PATH2_PARENT_INO,
 124         TOMOYO_PATH2_PARENT_PERM,
 125         TOMOYO_MAX_CONDITION_KEYWORD,
 126         TOMOYO_NUMBER_UNION,
 127         TOMOYO_NAME_UNION,
 128         TOMOYO_ARGV_ENTRY,
 129         TOMOYO_ENVP_ENTRY,
 130 };
 131
 132
 133 /* Index numbers for stat(). */
 134 enum tomoyo_path_stat_index {
 135         /* Do not change this order. */
 136         TOMOYO_PATH1,
 137         TOMOYO_PATH1_PARENT,
 138         TOMOYO_PATH2,
 139         TOMOYO_PATH2_PARENT,
 140         TOMOYO_MAX_PATH_STAT
 141 };
 142
 143 /* Index numbers for operation mode. */
 144 enum tomoyo_mode_index {
 145         TOMOYO_CONFIG_DISABLED,
 146         TOMOYO_CONFIG_LEARNING,
 147         TOMOYO_CONFIG_PERMISSIVE,
 148         TOMOYO_CONFIG_ENFORCING,
 149         TOMOYO_CONFIG_MAX_MODE,
 150         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
 151         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
 152         TOMOYO_CONFIG_USE_DEFAULT     = 255,
 153 };
 154
 155 /* Index numbers for entry type. */
 156 enum tomoyo_policy_id {
 157         TOMOYO_ID_GROUP,
 158         TOMOYO_ID_ADDRESS_GROUP,
 159         TOMOYO_ID_PATH_GROUP,
 160         TOMOYO_ID_NUMBER_GROUP,
 161         TOMOYO_ID_TRANSITION_CONTROL,
 162         TOMOYO_ID_AGGREGATOR,
 163         TOMOYO_ID_MANAGER,
 164         TOMOYO_ID_CONDITION,
 165         TOMOYO_ID_NAME,
 166         TOMOYO_ID_ACL,
 167         TOMOYO_ID_DOMAIN,
 168         TOMOYO_MAX_POLICY
 169 };
 170
 171 /* Index numbers for domain's attributes. */
 172 enum tomoyo_domain_info_flags_index {
 173         /* Quota warnning flag.   */
 174         TOMOYO_DIF_QUOTA_WARNED,
 175         /*
 176          * This domain was unable to create a new domain at
 177          * tomoyo_find_next_domain() because the name of the domain to be
 178          * created was too long or it could not allocate memory.
 179          * More than one process continued execve() without domain transition.
 180          */
 181         TOMOYO_DIF_TRANSITION_FAILED,
 182         TOMOYO_MAX_DOMAIN_INFO_FLAGS
 183 };
 184
 185 /* Index numbers for audit type. */
 186 enum tomoyo_grant_log {
 187         /* Follow profile's configuration. */
 188         TOMOYO_GRANTLOG_AUTO,
 189         /* Do not generate grant log. */
 190         TOMOYO_GRANTLOG_NO,
 191         /* Generate grant_log. */
 192         TOMOYO_GRANTLOG_YES,
 193 };
 194
 195 /* Index numbers for group entries. */
 196 enum tomoyo_group_id {
 197         TOMOYO_PATH_GROUP,
 198         TOMOYO_NUMBER_GROUP,
 199         TOMOYO_ADDRESS_GROUP,
 200         TOMOYO_MAX_GROUP
 201 };
 202
 203 /* Index numbers for type of numeric values. */
 204 enum tomoyo_value_type {
 205         TOMOYO_VALUE_TYPE_INVALID,
 206         TOMOYO_VALUE_TYPE_DECIMAL,
 207         TOMOYO_VALUE_TYPE_OCTAL,
 208         TOMOYO_VALUE_TYPE_HEXADECIMAL,
 209 };
 210
 211 /* Index numbers for domain transition control keywords. */
 212 enum tomoyo_transition_type {
 213         /* Do not change this order, */
 214         TOMOYO_TRANSITION_CONTROL_NO_RESET,
 215         TOMOYO_TRANSITION_CONTROL_RESET,
 216         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 217         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 218         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 219         TOMOYO_TRANSITION_CONTROL_KEEP,
 220         TOMOYO_MAX_TRANSITION_TYPE
 221 };
 222
 223 /* Index numbers for Access Controls. */
 224 enum tomoyo_acl_entry_type_index {
 225         TOMOYO_TYPE_PATH_ACL,
 226         TOMOYO_TYPE_PATH2_ACL,
 227         TOMOYO_TYPE_PATH_NUMBER_ACL,
 228         TOMOYO_TYPE_MKDEV_ACL,
 229         TOMOYO_TYPE_MOUNT_ACL,
 230         TOMOYO_TYPE_INET_ACL,
 231         TOMOYO_TYPE_UNIX_ACL,
 232         TOMOYO_TYPE_ENV_ACL,
 233         TOMOYO_TYPE_MANUAL_TASK_ACL,
 234 };
 235
 236 /* Index numbers for access controls with one pathname. */
 237 enum tomoyo_path_acl_index {
 238         TOMOYO_TYPE_EXECUTE,
 239         TOMOYO_TYPE_READ,
 240         TOMOYO_TYPE_WRITE,
 241         TOMOYO_TYPE_APPEND,
 242         TOMOYO_TYPE_UNLINK,
 243         TOMOYO_TYPE_GETATTR,
 244         TOMOYO_TYPE_RMDIR,
 245         TOMOYO_TYPE_TRUNCATE,
 246         TOMOYO_TYPE_SYMLINK,
 247         TOMOYO_TYPE_CHROOT,
 248         TOMOYO_TYPE_UMOUNT,
 249         TOMOYO_MAX_PATH_OPERATION
 250 };
 251
 252 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 253 enum tomoyo_memory_stat_type {
 254         TOMOYO_MEMORY_POLICY,
 255         TOMOYO_MEMORY_AUDIT,
 256         TOMOYO_MEMORY_QUERY,
 257         TOMOYO_MAX_MEMORY_STAT
 258 };
 259
 260 enum tomoyo_mkdev_acl_index {
 261         TOMOYO_TYPE_MKBLOCK,
 262         TOMOYO_TYPE_MKCHAR,
 263         TOMOYO_MAX_MKDEV_OPERATION
 264 };
 265
 266 /* Index numbers for socket operations. */
 267 enum tomoyo_network_acl_index {
 268         TOMOYO_NETWORK_BIND,    /* bind() operation. */
 269         TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
 270         TOMOYO_NETWORK_CONNECT, /* connect() operation. */
 271         TOMOYO_NETWORK_SEND,    /* send() operation. */
 272         TOMOYO_MAX_NETWORK_OPERATION
 273 };
 274
 275 /* Index numbers for access controls with two pathnames. */
 276 enum tomoyo_path2_acl_index {
 277         TOMOYO_TYPE_LINK,
 278         TOMOYO_TYPE_RENAME,
 279         TOMOYO_TYPE_PIVOT_ROOT,
 280         TOMOYO_MAX_PATH2_OPERATION
 281 };
 282
 283 /* Index numbers for access controls with one pathname and one number. */
 284 enum tomoyo_path_number_acl_index {
 285         TOMOYO_TYPE_CREATE,
 286         TOMOYO_TYPE_MKDIR,
 287         TOMOYO_TYPE_MKFIFO,
 288         TOMOYO_TYPE_MKSOCK,
 289         TOMOYO_TYPE_IOCTL,
 290         TOMOYO_TYPE_CHMOD,
 291         TOMOYO_TYPE_CHOWN,
 292         TOMOYO_TYPE_CHGRP,
 293         TOMOYO_MAX_PATH_NUMBER_OPERATION
 294 };
 295
 296 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 297 enum tomoyo_securityfs_interface_index {
 298         TOMOYO_DOMAINPOLICY,
 299         TOMOYO_EXCEPTIONPOLICY,
 300         TOMOYO_PROCESS_STATUS,
 301         TOMOYO_STAT,
 302         TOMOYO_AUDIT,
 303         TOMOYO_VERSION,
 304         TOMOYO_PROFILE,
 305         TOMOYO_QUERY,
 306         TOMOYO_MANAGER
 307 };
 308
 309 /* Index numbers for special mount operations. */
 310 enum tomoyo_special_mount {
 311         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 312         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 313         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 314         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 315         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 316         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 317         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 318         TOMOYO_MAX_SPECIAL_MOUNT
 319 };
 320
 321 /* Index numbers for functionality. */
 322 enum tomoyo_mac_index {
 323         TOMOYO_MAC_FILE_EXECUTE,
 324         TOMOYO_MAC_FILE_OPEN,
 325         TOMOYO_MAC_FILE_CREATE,
 326         TOMOYO_MAC_FILE_UNLINK,
 327         TOMOYO_MAC_FILE_GETATTR,
 328         TOMOYO_MAC_FILE_MKDIR,
 329         TOMOYO_MAC_FILE_RMDIR,
 330         TOMOYO_MAC_FILE_MKFIFO,
 331         TOMOYO_MAC_FILE_MKSOCK,
 332         TOMOYO_MAC_FILE_TRUNCATE,
 333         TOMOYO_MAC_FILE_SYMLINK,
 334         TOMOYO_MAC_FILE_MKBLOCK,
 335         TOMOYO_MAC_FILE_MKCHAR,
 336         TOMOYO_MAC_FILE_LINK,
 337         TOMOYO_MAC_FILE_RENAME,
 338         TOMOYO_MAC_FILE_CHMOD,
 339         TOMOYO_MAC_FILE_CHOWN,
 340         TOMOYO_MAC_FILE_CHGRP,
 341         TOMOYO_MAC_FILE_IOCTL,
 342         TOMOYO_MAC_FILE_CHROOT,
 343         TOMOYO_MAC_FILE_MOUNT,
 344         TOMOYO_MAC_FILE_UMOUNT,
 345         TOMOYO_MAC_FILE_PIVOT_ROOT,
 346         TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
 347         TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
 348         TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
 349         TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
 350         TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
 351         TOMOYO_MAC_NETWORK_INET_RAW_BIND,
 352         TOMOYO_MAC_NETWORK_INET_RAW_SEND,
 353         TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
 354         TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
 355         TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
 356         TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
 357         TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
 358         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
 359         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
 360         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 361         TOMOYO_MAC_ENVIRON,
 362         TOMOYO_MAX_MAC_INDEX
 363 };
 364
 365 /* Index numbers for category of functionality. */
 366 enum tomoyo_mac_category_index {
 367         TOMOYO_MAC_CATEGORY_FILE,
 368         TOMOYO_MAC_CATEGORY_NETWORK,
 369         TOMOYO_MAC_CATEGORY_MISC,
 370         TOMOYO_MAX_MAC_CATEGORY_INDEX
 371 };
 372
 373 /*
 374  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 375  * occurred in enforcing mode and the userspace daemon decided to retry.
 376  *
 377  * We must choose a positive value in order to distinguish "granted" (which is
 378  * 0) and "rejected" (which is a negative value) and "retry".
 379  */
 380 #define TOMOYO_RETRY_REQUEST 1
 381
 382 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 383 enum tomoyo_policy_stat_type {
 384         /* Do not change this order. */
 385         TOMOYO_STAT_POLICY_UPDATES,
 386         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 387         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 388         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 389         TOMOYO_MAX_POLICY_STAT
 390 };
 391
 392 /* Index numbers for profile's PREFERENCE values. */
 393 enum tomoyo_pref_index {
 394         TOMOYO_PREF_MAX_AUDIT_LOG,
 395         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 396         TOMOYO_MAX_PREF
 397 };
 398
 399 /********** Structure definitions. **********/
 400
 401 /* Common header for holding ACL entries. */
 402 struct tomoyo_acl_head {
 403         struct list_head list;
 404         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 405 } __packed;
 406
 407 /* Common header for shared entries. */
 408 struct tomoyo_shared_acl_head {
 409         struct list_head list;
 410         atomic_t users;
 411 } __packed;
 412
 413 struct tomoyo_policy_namespace;
 414
 415 /* Structure for request info. */
 416 struct tomoyo_request_info {
 417         /*
 418          * For holding parameters specific to operations which deal files.
 419          * NULL if not dealing files.
 420          */
 421         struct tomoyo_obj_info *obj;
 422         /*
 423          * For holding parameters specific to execve() request.
 424          * NULL if not dealing do_execve().
 425          */
 426         struct tomoyo_execve *ee;
 427         struct tomoyo_domain_info *domain;
 428         /* For holding parameters. */
 429         union {
 430                 struct {
 431                         const struct tomoyo_path_info *filename;
 432                         /* For using wildcards at tomoyo_find_next_domain(). */
 433                         const struct tomoyo_path_info *matched_path;
 434                         /* One of values in "enum tomoyo_path_acl_index". */
 435                         u8 operation;
 436                 } path;
 437                 struct {
 438                         const struct tomoyo_path_info *filename1;
 439                         const struct tomoyo_path_info *filename2;
 440                         /* One of values in "enum tomoyo_path2_acl_index". */
 441                         u8 operation;
 442                 } path2;
 443                 struct {
 444                         const struct tomoyo_path_info *filename;
 445                         unsigned int mode;
 446                         unsigned int major;
 447                         unsigned int minor;
 448                         /* One of values in "enum tomoyo_mkdev_acl_index". */
 449                         u8 operation;
 450                 } mkdev;
 451                 struct {
 452                         const struct tomoyo_path_info *filename;
 453                         unsigned long number;
 454                         /*
 455                          * One of values in
 456                          * "enum tomoyo_path_number_acl_index".
 457                          */
 458                         u8 operation;
 459                 } path_number;
 460                 struct {
 461                         const struct tomoyo_path_info *name;
 462                 } environ;
 463                 struct {
 464                         const __be32 *address;
 465                         u16 port;
 466                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 467                         u8 protocol;
 468                         /* One of values in "enum tomoyo_network_acl_index". */
 469                         u8 operation;
 470                         bool is_ipv6;
 471                 } inet_network;
 472                 struct {
 473                         const struct tomoyo_path_info *address;
 474                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 475                         u8 protocol;
 476                         /* One of values in "enum tomoyo_network_acl_index". */
 477                         u8 operation;
 478                 } unix_network;
 479                 struct {
 480                         const struct tomoyo_path_info *type;
 481                         const struct tomoyo_path_info *dir;
 482                         const struct tomoyo_path_info *dev;
 483                         unsigned long flags;
 484                         int need_dev;
 485                 } mount;
 486                 struct {
 487                         const struct tomoyo_path_info *domainname;
 488                 } task;
 489         } param;
 490         struct tomoyo_acl_info *matched_acl;
 491         u8 param_type;
 492         bool granted;
 493         u8 retry;
 494         u8 profile;
 495         u8 mode; /* One of tomoyo_mode_index . */
 496         u8 type;
 497 };
 498
 499 /* Structure for holding a token. */
 500 struct tomoyo_path_info {
 501         const char *name;
 502         u32 hash;          /* = full_name_hash(name, strlen(name)) */
 503         u16 const_len;     /* = tomoyo_const_part_length(name)     */
 504         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 505         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 506 };
 507
 508 /* Structure for holding string data. */
 509 struct tomoyo_name {
 510         struct tomoyo_shared_acl_head head;
 511         struct tomoyo_path_info entry;
 512 };
 513
 514 /* Structure for holding a word. */
 515 struct tomoyo_name_union {
 516         /* Either @filename or @group is NULL. */
 517         const struct tomoyo_path_info *filename;
 518         struct tomoyo_group *group;
 519 };
 520
 521 /* Structure for holding a number. */
 522 struct tomoyo_number_union {
 523         unsigned long values[2];
 524         struct tomoyo_group *group; /* Maybe NULL. */
 525         /* One of values in "enum tomoyo_value_type". */
 526         u8 value_type[2];
 527 };
 528
 529 /* Structure for holding an IP address. */
 530 struct tomoyo_ipaddr_union {
 531         struct in6_addr ip[2]; /* Big endian. */
 532         struct tomoyo_group *group; /* Pointer to address group. */
 533         bool is_ipv6; /* Valid only if @group == NULL. */
 534 };
 535
 536 /* Structure for "path_group"/"number_group"/"address_group" directive. */
 537 struct tomoyo_group {
 538         struct tomoyo_shared_acl_head head;
 539         const struct tomoyo_path_info *group_name;
 540         struct list_head member_list;
 541 };
 542
 543 /* Structure for "path_group" directive. */
 544 struct tomoyo_path_group {
 545         struct tomoyo_acl_head head;
 546         const struct tomoyo_path_info *member_name;
 547 };
 548
 549 /* Structure for "number_group" directive. */
 550 struct tomoyo_number_group {
 551         struct tomoyo_acl_head head;
 552         struct tomoyo_number_union number;
 553 };
 554
 555 /* Structure for "address_group" directive. */
 556 struct tomoyo_address_group {
 557         struct tomoyo_acl_head head;
 558         /* Structure for holding an IP address. */
 559         struct tomoyo_ipaddr_union address;
 560 };
 561
 562 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
 563 struct tomoyo_mini_stat {
 564         uid_t uid;
 565         gid_t gid;
 566         ino_t ino;
 567         mode_t mode;
 568         dev_t dev;
 569         dev_t rdev;
 570 };
 571
 572 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
 573 struct tomoyo_page_dump {
 574         struct page *page;    /* Previously dumped page. */
 575         char *data;           /* Contents of "page". Size is PAGE_SIZE. */
 576 };
 577
 578 /* Structure for attribute checks in addition to pathname checks. */
 579 struct tomoyo_obj_info {
 580         /*
 581          * True if tomoyo_get_attributes() was already called, false otherwise.
 582          */
 583         bool validate_done;
 584         /* True if @stat[] is valid. */
 585         bool stat_valid[TOMOYO_MAX_PATH_STAT];
 586         /* First pathname. Initialized with { NULL, NULL } if no path. */
 587         struct path path1;
 588         /* Second pathname. Initialized with { NULL, NULL } if no path. */
 589         struct path path2;
 590         /*
 591          * Information on @path1, @path1's parent directory, @path2, @path2's
 592          * parent directory.
 593          */
 594         struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
 595         /*
 596          * Content of symbolic link to be created. NULL for operations other
 597          * than symlink().
 598          */
 599         struct tomoyo_path_info *symlink_target;
 600 };
 601
 602 /* Structure for argv[]. */
 603 struct tomoyo_argv {
 604         unsigned long index;
 605         const struct tomoyo_path_info *value;
 606         bool is_not;
 607 };
 608
 609 /* Structure for envp[]. */
 610 struct tomoyo_envp {
 611         const struct tomoyo_path_info *name;
 612         const struct tomoyo_path_info *value;
 613         bool is_not;
 614 };
 615
 616 /* Structure for execve() operation. */
 617 struct tomoyo_execve {
 618         struct tomoyo_request_info r;
 619         struct tomoyo_obj_info obj;
 620         struct linux_binprm *bprm;
 621         const struct tomoyo_path_info *transition;
 622         /* For dumping argv[] and envp[]. */
 623         struct tomoyo_page_dump dump;
 624         /* For temporary use. */
 625         char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
 626 };
 627
 628 /* Structure for entries which follows "struct tomoyo_condition". */
 629 struct tomoyo_condition_element {
 630         /*
 631          * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
 632          * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
 633          * of the array of this struct.
 634          */
 635         u8 left;
 636         /*
 637          * Right hand operand. A "struct tomoyo_number_union" for
 638          * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
 639          * TOMOYO_NAME_UNION is attached to the tail of the array of this
 640          * struct.
 641          */
 642         u8 right;
 643         /* Equation operator. True if equals or overlaps, false otherwise. */
 644         bool equals;
 645 };
 646
 647 /* Structure for optional arguments. */
 648 struct tomoyo_condition {
 649         struct tomoyo_shared_acl_head head;
 650         u32 size; /* Memory size allocated for this entry. */
 651         u16 condc; /* Number of conditions in this struct. */
 652         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 653         u16 names_count; /* Number of "struct tomoyo_name_union names". */
 654         u16 argc; /* Number of "struct tomoyo_argv". */
 655         u16 envc; /* Number of "struct tomoyo_envp". */
 656         u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
 657         const struct tomoyo_path_info *transit; /* Maybe NULL. */
 658         /*
 659          * struct tomoyo_condition_element condition[condc];
 660          * struct tomoyo_number_union values[numbers_count];
 661          * struct tomoyo_name_union names[names_count];
 662          * struct tomoyo_argv argv[argc];
 663          * struct tomoyo_envp envp[envc];
 664          */
 665 };
 666
 667 /* Common header for individual entries. */
 668 struct tomoyo_acl_info {
 669         struct list_head list;
 670         struct tomoyo_condition *cond; /* Maybe NULL. */
 671         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 672         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 673 } __packed;
 674
 675 /* Structure for domain information. */
 676 struct tomoyo_domain_info {
 677         struct list_head list;
 678         struct list_head acl_info_list;
 679         /* Name of this domain. Never NULL.          */
 680         const struct tomoyo_path_info *domainname;
 681         /* Namespace for this domain. Never NULL. */
 682         struct tomoyo_policy_namespace *ns;
 683         u8 profile;        /* Profile number to use. */
 684         u8 group;          /* Group number to use.   */
 685         bool is_deleted;   /* Delete flag.           */
 686         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 687         atomic_t users; /* Number of referring credentials. */
 688 };
 689
 690 /*
 691  * Structure for "task manual_domain_transition" directive.
 692  */
 693 struct tomoyo_task_acl {
 694         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
 695         /* Pointer to domainname. */
 696         const struct tomoyo_path_info *domainname;
 697 };
 698
 699 /*
 700  * Structure for "file execute", "file read", "file write", "file append",
 701  * "file unlink", "file getattr", "file rmdir", "file truncate",
 702  * "file symlink", "file chroot" and "file unmount" directive.
 703  */
 704 struct tomoyo_path_acl {
 705         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 706         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 707         struct tomoyo_name_union name;
 708 };
 709
 710 /*
 711  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 712  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 713  */
 714 struct tomoyo_path_number_acl {
 715         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 716         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 717         u8 perm;
 718         struct tomoyo_name_union name;
 719         struct tomoyo_number_union number;
 720 };
 721
 722 /* Structure for "file mkblock" and "file mkchar" directive. */
 723 struct tomoyo_mkdev_acl {
 724         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 725         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 726         struct tomoyo_name_union name;
 727         struct tomoyo_number_union mode;
 728         struct tomoyo_number_union major;
 729         struct tomoyo_number_union minor;
 730 };
 731
 732 /*
 733  * Structure for "file rename", "file link" and "file pivot_root" directive.
 734  */
 735 struct tomoyo_path2_acl {
 736         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 737         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 738         struct tomoyo_name_union name1;
 739         struct tomoyo_name_union name2;
 740 };
 741
 742 /* Structure for "file mount" directive. */
 743 struct tomoyo_mount_acl {
 744         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 745         struct tomoyo_name_union dev_name;
 746         struct tomoyo_name_union dir_name;
 747         struct tomoyo_name_union fs_type;
 748         struct tomoyo_number_union flags;
 749 };
 750
 751 /* Structure for "misc env" directive in domain policy. */
 752 struct tomoyo_env_acl {
 753         struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
 754         const struct tomoyo_path_info *env; /* environment variable */
 755 };
 756
 757 /* Structure for "network inet" directive. */
 758 struct tomoyo_inet_acl {
 759         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
 760         u8 protocol;
 761         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 762         struct tomoyo_ipaddr_union address;
 763         struct tomoyo_number_union port;
 764 };
 765
 766 /* Structure for "network unix" directive. */
 767 struct tomoyo_unix_acl {
 768         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
 769         u8 protocol;
 770         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 771         struct tomoyo_name_union name;
 772 };
 773
 774 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 775 struct tomoyo_acl_param {
 776         char *data;
 777         struct list_head *list;
 778         struct tomoyo_policy_namespace *ns;
 779         bool is_delete;
 780 };
 781
 782 #define TOMOYO_MAX_IO_READ_QUEUE 64
 783
 784 /*
 785  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 786  * interfaces.
 787  */
 788 struct tomoyo_io_buffer {
 789         void (*read) (struct tomoyo_io_buffer *);
 790         int (*write) (struct tomoyo_io_buffer *);
 791         int (*poll) (struct file *file, poll_table *wait);
 792         /* Exclusive lock for this structure.   */
 793         struct mutex io_sem;
 794         char __user *read_user_buf;
 795         size_t read_user_buf_avail;
 796         struct {
 797                 struct list_head *ns;
 798                 struct list_head *domain;
 799                 struct list_head *group;
 800                 struct list_head *acl;
 801                 size_t avail;
 802                 unsigned int step;
 803                 unsigned int query_index;
 804                 u16 index;
 805                 u16 cond_index;
 806                 u8 acl_group_index;
 807                 u8 cond_step;
 808                 u8 bit;
 809                 u8 w_pos;
 810                 bool eof;
 811                 bool print_this_domain_only;
 812                 bool print_transition_related_only;
 813                 bool print_cond_part;
 814                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 815         } r;
 816         struct {
 817                 struct tomoyo_policy_namespace *ns;
 818                 /* The position currently writing to.   */
 819                 struct tomoyo_domain_info *domain;
 820                 /* Bytes available for writing.         */
 821                 size_t avail;
 822                 bool is_delete;
 823         } w;
 824         /* Buffer for reading.                  */
 825         char *read_buf;
 826         /* Size of read buffer.                 */
 827         size_t readbuf_size;
 828         /* Buffer for writing.                  */
 829         char *write_buf;
 830         /* Size of write buffer.                */
 831         size_t writebuf_size;
 832         /* Type of this interface.              */
 833         enum tomoyo_securityfs_interface_index type;
 834         /* Users counter protected by tomoyo_io_buffer_list_lock. */
 835         u8 users;
 836         /* List for telling GC not to kfree() elements. */
 837         struct list_head list;
 838 };
 839
 840 /*
 841  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 842  * "no_keep_domain" keyword.
 843  */
 844 struct tomoyo_transition_control {
 845         struct tomoyo_acl_head head;
 846         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 847         /* True if the domainname is tomoyo_get_last_name(). */
 848         bool is_last_name;
 849         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 850         const struct tomoyo_path_info *program;    /* Maybe NULL */
 851 };
 852
 853 /* Structure for "aggregator" keyword. */
 854 struct tomoyo_aggregator {
 855         struct tomoyo_acl_head head;
 856         const struct tomoyo_path_info *original_name;
 857         const struct tomoyo_path_info *aggregated_name;
 858 };
 859
 860 /* Structure for policy manager. */
 861 struct tomoyo_manager {
 862         struct tomoyo_acl_head head;
 863         bool is_domain;  /* True if manager is a domainname. */
 864         /* A path to program or a domainname. */
 865         const struct tomoyo_path_info *manager;
 866 };
 867
 868 struct tomoyo_preference {
 869         unsigned int learning_max_entry;
 870         bool enforcing_verbose;
 871         bool learning_verbose;
 872         bool permissive_verbose;
 873 };
 874
 875 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 876 struct tomoyo_profile {
 877         const struct tomoyo_path_info *comment;
 878         struct tomoyo_preference *learning;
 879         struct tomoyo_preference *permissive;
 880         struct tomoyo_preference *enforcing;
 881         struct tomoyo_preference preference;
 882         u8 default_config;
 883         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 884         unsigned int pref[TOMOYO_MAX_PREF];
 885 };
 886
 887 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 888 struct tomoyo_time {
 889         u16 year;
 890         u8 month;
 891         u8 day;
 892         u8 hour;
 893         u8 min;
 894         u8 sec;
 895 };
 896
 897 /* Structure for policy namespace. */
 898 struct tomoyo_policy_namespace {
 899         /* Profile table. Memory is allocated as needed. */
 900         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 901         /* List of "struct tomoyo_group". */
 902         struct list_head group_list[TOMOYO_MAX_GROUP];
 903         /* List of policy. */
 904         struct list_head policy_list[TOMOYO_MAX_POLICY];
 905         /* The global ACL referred by "use_group" keyword. */
 906         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 907         /* List for connecting to tomoyo_namespace_list list. */
 908         struct list_head namespace_list;
 909         /* Profile version. Currently only 20110903 is defined. */
 910         unsigned int profile_version;
 911         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 912         const char *name;
 913 };
 914
 915 /********** Function prototypes. **********/
 916
 917 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
 918                                   const struct tomoyo_group *group);
 919 bool tomoyo_compare_number_union(const unsigned long value,
 920                                  const struct tomoyo_number_union *ptr);
 921 bool tomoyo_condition(struct tomoyo_request_info *r,
 922                       const struct tomoyo_condition *cond);
 923 bool tomoyo_correct_domain(const unsigned char *domainname);
 924 bool tomoyo_correct_path(const char *filename);
 925 bool tomoyo_correct_word(const char *string);
 926 bool tomoyo_domain_def(const unsigned char *buffer);
 927 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 928 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
 929                       struct tomoyo_page_dump *dump);
 930 bool tomoyo_memory_ok(void *ptr);
 931 bool tomoyo_number_matches_group(const unsigned long min,
 932                                  const unsigned long max,
 933                                  const struct tomoyo_group *group);
 934 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
 935                                struct tomoyo_ipaddr_union *ptr);
 936 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 937                              struct tomoyo_name_union *ptr);
 938 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 939                                struct tomoyo_number_union *ptr);
 940 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 941                                  const struct tomoyo_path_info *pattern);
 942 bool tomoyo_permstr(const char *string, const char *keyword);
 943 bool tomoyo_str_starts(char **src, const char *find);
 944 char *tomoyo_encode(const char *str);
 945 char *tomoyo_encode2(const char *str, int str_len);
 946 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 947                       va_list args);
 948 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 949 char *tomoyo_realpath_from_path(struct path *path);
 950 char *tomoyo_realpath_nofollow(const char *pathname);
 951 const char *tomoyo_get_exe(void);
 952 const char *tomoyo_yesno(const unsigned int value);
 953 const struct tomoyo_path_info *tomoyo_compare_name_union
 954 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 955 const struct tomoyo_path_info *tomoyo_get_domainname
 956 (struct tomoyo_acl_param *param);
 957 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 958 const struct tomoyo_path_info *tomoyo_path_matches_group
 959 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 960 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 961                                  struct path *path, const int flag);
 962 int tomoyo_close_control(struct tomoyo_io_buffer *head);
 963 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 964 int tomoyo_execute_permission(struct tomoyo_request_info *r,
 965                               const struct tomoyo_path_info *filename);
 966 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 967 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 968                     const u8 index);
 969 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 970                              struct tomoyo_domain_info *domain,
 971                              const u8 index);
 972 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
 973                       const unsigned int mode, unsigned int dev);
 974 int tomoyo_mount_permission(char *dev_name, struct path *path,
 975                             const char *type, unsigned long flags,
 976                             void *data_page);
 977 int tomoyo_open_control(const u8 type, struct file *file);
 978 int tomoyo_path2_perm(const u8 operation, struct path *path1,
 979                       struct path *path2);
 980 int tomoyo_path_number_perm(const u8 operation, struct path *path,
 981                             unsigned long number);
 982 int tomoyo_path_perm(const u8 operation, struct path *path,
 983                      const char *target);
 984 int tomoyo_poll_control(struct file *file, poll_table *wait);
 985 int tomoyo_poll_log(struct file *file, poll_table *wait);
 986 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
 987                                   int addr_len);
 988 int tomoyo_socket_connect_permission(struct socket *sock,
 989                                      struct sockaddr *addr, int addr_len);
 990 int tomoyo_socket_listen_permission(struct socket *sock);
 991 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
 992                                      int size);
 993 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 994         __printf(2, 3);
 995 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 996                          struct tomoyo_acl_param *param,
 997                          bool (*check_duplicate)
 998                          (const struct tomoyo_acl_info *,
 999                           const struct tomoyo_acl_info *),
1000                          bool (*merge_duplicate)
1001                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1002                           const bool));
1003 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1004                          struct tomoyo_acl_param *param,
1005                          bool (*check_duplicate)
1006                          (const struct tomoyo_acl_head *,
1007                           const struct tomoyo_acl_head *));
1008 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1009 int tomoyo_write_file(struct tomoyo_acl_param *param);
1010 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1011 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1012 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1013 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1014                                     const u8 type);
1015 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1016 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1017                             const int buffer_len);
1018 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1019                              const char __user *buffer, const int buffer_len);
1020 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1021 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1022                                                 const bool transit);
1023 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1024 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1025                                       const u8 idx);
1026 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1027 (const char *domainname);
1028 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1029                                       const u8 profile);
1030 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1031                                 const u8 index);
1032 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1033 void *tomoyo_commit_ok(void *data, const unsigned int size);
1034 void __init tomoyo_load_builtin_policy(void);
1035 void __init tomoyo_mm_init(void);
1036 void tomoyo_check_acl(struct tomoyo_request_info *r,
1037                       bool (*check_entry) (struct tomoyo_request_info *,
1038                                            const struct tomoyo_acl_info *));
1039 void tomoyo_check_profile(void);
1040 void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
1041 void tomoyo_del_condition(struct list_head *element);
1042 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1043 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1044 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1045 void tomoyo_load_policy(const char *filename);
1046 void tomoyo_normalize_line(unsigned char *buffer);
1047 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1048 void tomoyo_print_ip(char *buf, const unsigned int size,
1049                      const struct tomoyo_ipaddr_union *ptr);
1050 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1051                         const unsigned long value, const u8 type);
1052 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1053 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1054 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1055 void tomoyo_update_stat(const u8 index);
1056 void tomoyo_warn_oom(const char *function);
1057 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1058         __printf(2, 3);
1059 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1060                        va_list args);
1061
1062 /********** External variable definitions. **********/
1063
1064 extern bool tomoyo_policy_loaded;
1065 extern const char * const tomoyo_condition_keyword
1066 [TOMOYO_MAX_CONDITION_KEYWORD];
1067 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1068 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1069                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1070 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1071 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1072 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1073 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1074 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1075 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1076 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1077 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1078 extern struct list_head tomoyo_condition_list;
1079 extern struct list_head tomoyo_domain_list;
1080 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1081 extern struct list_head tomoyo_namespace_list;
1082 extern struct mutex tomoyo_policy_lock;
1083 extern struct srcu_struct tomoyo_ss;
1084 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1085 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1086 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1087 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1088
1089 /********** Inlined functions. **********/
1090
1091 /**
1092  * tomoyo_read_lock - Take lock for protecting policy.
1093  *
1094  * Returns index number for tomoyo_read_unlock().
1095  */
1096 static inline int tomoyo_read_lock(void)
1097 {
1098         return srcu_read_lock(&tomoyo_ss);
1099 }
1100
1101 /**
1102  * tomoyo_read_unlock - Release lock for protecting policy.
1103  *
1104  * @idx: Index number returned by tomoyo_read_lock().
1105  *
1106  * Returns nothing.
1107  */
1108 static inline void tomoyo_read_unlock(int idx)
1109 {
1110         srcu_read_unlock(&tomoyo_ss, idx);
1111 }
1112
1113 /**
1114  * tomoyo_sys_getppid - Copy of getppid().
1115  *
1116  * Returns parent process's PID.
1117  *
1118  * Alpha does not have getppid() defined. To be able to build this module on
1119  * Alpha, I have to copy getppid() from kernel/timer.c.
1120  */
1121 static inline pid_t tomoyo_sys_getppid(void)
1122 {
1123         pid_t pid;
1124         rcu_read_lock();
1125         pid = task_tgid_vnr(current->real_parent);
1126         rcu_read_unlock();
1127         return pid;
1128 }
1129
1130 /**
1131  * tomoyo_sys_getpid - Copy of getpid().
1132  *
1133  * Returns current thread's PID.
1134  *
1135  * Alpha does not have getpid() defined. To be able to build this module on
1136  * Alpha, I have to copy getpid() from kernel/timer.c.
1137  */
1138 static inline pid_t tomoyo_sys_getpid(void)
1139 {
1140         return task_tgid_vnr(current);
1141 }
1142
1143 /**
1144  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1145  *
1146  * @a: Pointer to "struct tomoyo_path_info".
1147  * @b: Pointer to "struct tomoyo_path_info".
1148  *
1149  * Returns true if @a == @b, false otherwise.
1150  */
1151 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1152                                   const struct tomoyo_path_info *b)
1153 {
1154         return a->hash != b->hash || strcmp(a->name, b->name);
1155 }
1156
1157 /**
1158  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1159  *
1160  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1161  *
1162  * Returns nothing.
1163  */
1164 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1165 {
1166         if (name) {
1167                 struct tomoyo_name *ptr =
1168                         container_of(name, typeof(*ptr), entry);
1169                 atomic_dec(&ptr->head.users);
1170         }
1171 }
1172
1173 /**
1174  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1175  *
1176  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1177  *
1178  * Returns nothing.
1179  */
1180 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1181 {
1182         if (cond)
1183                 atomic_dec(&cond->head.users);
1184 }
1185
1186 /**
1187  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1188  *
1189  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1190  *
1191  * Returns nothing.
1192  */
1193 static inline void tomoyo_put_group(struct tomoyo_group *group)
1194 {
1195         if (group)
1196                 atomic_dec(&group->head.users);
1197 }
1198
1199 /**
1200  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1201  *
1202  * Returns pointer to "struct tomoyo_domain_info" for current thread.
1203  */
1204 static inline struct tomoyo_domain_info *tomoyo_domain(void)
1205 {
1206         return current_cred()->security;
1207 }
1208
1209 /**
1210  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1211  *
1212  * @task: Pointer to "struct task_struct".
1213  *
1214  * Returns pointer to "struct tomoyo_security" for specified thread.
1215  */
1216 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1217                                                             *task)
1218 {
1219         return task_cred_xxx(task, security);
1220 }
1221
1222 /**
1223  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1224  *
1225  * @a: Pointer to "struct tomoyo_name_union".
1226  * @b: Pointer to "struct tomoyo_name_union".
1227  *
1228  * Returns true if @a == @b, false otherwise.
1229  */
1230 static inline bool tomoyo_same_name_union
1231 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1232 {
1233         return a->filename == b->filename && a->group == b->group;
1234 }
1235
1236 /**
1237  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1238  *
1239  * @a: Pointer to "struct tomoyo_number_union".
1240  * @b: Pointer to "struct tomoyo_number_union".
1241  *
1242  * Returns true if @a == @b, false otherwise.
1243  */
1244 static inline bool tomoyo_same_number_union
1245 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1246 {
1247         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1248                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1249                 a->value_type[1] == b->value_type[1];
1250 }
1251
1252 /**
1253  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1254  *
1255  * @a: Pointer to "struct tomoyo_ipaddr_union".
1256  * @b: Pointer to "struct tomoyo_ipaddr_union".
1257  *
1258  * Returns true if @a == @b, false otherwise.
1259  */
1260 static inline bool tomoyo_same_ipaddr_union
1261 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1262 {
1263         return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1264                 a->is_ipv6 == b->is_ipv6;
1265 }
1266
1267 /**
1268  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1269  *
1270  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1271  */
1272 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1273 {
1274         return tomoyo_domain()->ns;
1275 }
1276
1277 #if defined(CONFIG_SLOB)
1278
1279 /**
1280  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1281  *
1282  * @size: Size to be rounded up.
1283  *
1284  * Returns @size.
1285  *
1286  * Since SLOB does not round up, this function simply returns @size.
1287  */
1288 static inline int tomoyo_round2(size_t size)
1289 {
1290         return size;
1291 }
1292
1293 #else
1294
1295 /**
1296  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1297  *
1298  * @size: Size to be rounded up.
1299  *
1300  * Returns rounded size.
1301  *
1302  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1303  * (e.g.) 128 bytes.
1304  */
1305 static inline int tomoyo_round2(size_t size)
1306 {
1307 #if PAGE_SIZE == 4096
1308         size_t bsize = 32;
1309 #else
1310         size_t bsize = 64;
1311 #endif
1312         if (!size)
1313                 return 0;
1314         while (size > bsize)
1315                 bsize <<= 1;
1316         return bsize;
1317 }
1318
1319 #endif
1320
1321 /**
1322  * list_for_each_cookie - iterate over a list with cookie.
1323  * @pos:        the &struct list_head to use as a loop cursor.
1324  * @head:       the head for your list.
1325  */
1326 #define list_for_each_cookie(pos, head)                                 \
1327         if (!pos)                                                       \
1328                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1329         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1330
1331 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */