security/tomoyo/common.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * security/tomoyo/common.h
   4  *
   5  * Header file for TOMOYO.
   6  *
   7  * Copyright (C) 2005-2011  NTT DATA CORPORATION
   8  */
   9
  10 #ifndef _SECURITY_TOMOYO_COMMON_H
  11 #define _SECURITY_TOMOYO_COMMON_H
  12
  13 #include <linux/ctype.h>
  14 #include <linux/string.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/kmod.h>
  18 #include <linux/fs.h>
  19 #include <linux/sched.h>
  20 #include <linux/namei.h>
  21 #include <linux/mount.h>
  22 #include <linux/list.h>
  23 #include <linux/cred.h>
  24 #include <linux/poll.h>
  25 #include <linux/binfmts.h>
  26 #include <linux/highmem.h>
  27 #include <linux/net.h>
  28 #include <linux/inet.h>
  29 #include <linux/in.h>
  30 #include <linux/in6.h>
  31 #include <linux/un.h>
  32 #include <linux/lsm_hooks.h>
  33 #include <net/sock.h>
  34 #include <net/af_unix.h>
  35 #include <net/ip.h>
  36 #include <net/ipv6.h>
  37 #include <net/udp.h>
  38
  39 /********** Constants definitions. **********/
  40
  41 /*
  42  * TOMOYO uses this hash only when appending a string into the string
  43  * table. Frequency of appending strings is very low. So we don't need
  44  * large (e.g. 64k) hash size. 256 will be sufficient.
  45  */
  46 #define TOMOYO_HASH_BITS  8
  47 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  48
  49 /*
  50  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
  51  * Therefore, we don't need SOCK_MAX.
  52  */
  53 #define TOMOYO_SOCK_MAX 6
  54
  55 #define TOMOYO_EXEC_TMPSIZE     4096
  56
  57 /* Garbage collector is trying to kfree() this element. */
  58 #define TOMOYO_GC_IN_PROGRESS -1
  59
  60 /* Profile number is an integer between 0 and 255. */
  61 #define TOMOYO_MAX_PROFILES 256
  62
  63 /* Group number is an integer between 0 and 255. */
  64 #define TOMOYO_MAX_ACL_GROUPS 256
  65
  66 /* Index numbers for "struct tomoyo_condition". */
  67 enum tomoyo_conditions_index {
  68         TOMOYO_TASK_UID,             /* current_uid()   */
  69         TOMOYO_TASK_EUID,            /* current_euid()  */
  70         TOMOYO_TASK_SUID,            /* current_suid()  */
  71         TOMOYO_TASK_FSUID,           /* current_fsuid() */
  72         TOMOYO_TASK_GID,             /* current_gid()   */
  73         TOMOYO_TASK_EGID,            /* current_egid()  */
  74         TOMOYO_TASK_SGID,            /* current_sgid()  */
  75         TOMOYO_TASK_FSGID,           /* current_fsgid() */
  76         TOMOYO_TASK_PID,             /* sys_getpid()   */
  77         TOMOYO_TASK_PPID,            /* sys_getppid()  */
  78         TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
  79         TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
  80         TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
  81         TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
  82         TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
  83         TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
  84         TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
  85         TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
  86         TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
  87         TOMOYO_MODE_SETUID,          /* S_ISUID */
  88         TOMOYO_MODE_SETGID,          /* S_ISGID */
  89         TOMOYO_MODE_STICKY,          /* S_ISVTX */
  90         TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
  91         TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
  92         TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
  93         TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
  94         TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
  95         TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
  96         TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
  97         TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
  98         TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
  99         TOMOYO_EXEC_REALPATH,
 100         TOMOYO_SYMLINK_TARGET,
 101         TOMOYO_PATH1_UID,
 102         TOMOYO_PATH1_GID,
 103         TOMOYO_PATH1_INO,
 104         TOMOYO_PATH1_MAJOR,
 105         TOMOYO_PATH1_MINOR,
 106         TOMOYO_PATH1_PERM,
 107         TOMOYO_PATH1_TYPE,
 108         TOMOYO_PATH1_DEV_MAJOR,
 109         TOMOYO_PATH1_DEV_MINOR,
 110         TOMOYO_PATH2_UID,
 111         TOMOYO_PATH2_GID,
 112         TOMOYO_PATH2_INO,
 113         TOMOYO_PATH2_MAJOR,
 114         TOMOYO_PATH2_MINOR,
 115         TOMOYO_PATH2_PERM,
 116         TOMOYO_PATH2_TYPE,
 117         TOMOYO_PATH2_DEV_MAJOR,
 118         TOMOYO_PATH2_DEV_MINOR,
 119         TOMOYO_PATH1_PARENT_UID,
 120         TOMOYO_PATH1_PARENT_GID,
 121         TOMOYO_PATH1_PARENT_INO,
 122         TOMOYO_PATH1_PARENT_PERM,
 123         TOMOYO_PATH2_PARENT_UID,
 124         TOMOYO_PATH2_PARENT_GID,
 125         TOMOYO_PATH2_PARENT_INO,
 126         TOMOYO_PATH2_PARENT_PERM,
 127         TOMOYO_MAX_CONDITION_KEYWORD,
 128         TOMOYO_NUMBER_UNION,
 129         TOMOYO_NAME_UNION,
 130         TOMOYO_ARGV_ENTRY,
 131         TOMOYO_ENVP_ENTRY,
 132 };
 133
 134
 135 /* Index numbers for stat(). */
 136 enum tomoyo_path_stat_index {
 137         /* Do not change this order. */
 138         TOMOYO_PATH1,
 139         TOMOYO_PATH1_PARENT,
 140         TOMOYO_PATH2,
 141         TOMOYO_PATH2_PARENT,
 142         TOMOYO_MAX_PATH_STAT
 143 };
 144
 145 /* Index numbers for operation mode. */
 146 enum tomoyo_mode_index {
 147         TOMOYO_CONFIG_DISABLED,
 148         TOMOYO_CONFIG_LEARNING,
 149         TOMOYO_CONFIG_PERMISSIVE,
 150         TOMOYO_CONFIG_ENFORCING,
 151         TOMOYO_CONFIG_MAX_MODE,
 152         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
 153         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
 154         TOMOYO_CONFIG_USE_DEFAULT     = 255,
 155 };
 156
 157 /* Index numbers for entry type. */
 158 enum tomoyo_policy_id {
 159         TOMOYO_ID_GROUP,
 160         TOMOYO_ID_ADDRESS_GROUP,
 161         TOMOYO_ID_PATH_GROUP,
 162         TOMOYO_ID_NUMBER_GROUP,
 163         TOMOYO_ID_TRANSITION_CONTROL,
 164         TOMOYO_ID_AGGREGATOR,
 165         TOMOYO_ID_MANAGER,
 166         TOMOYO_ID_CONDITION,
 167         TOMOYO_ID_NAME,
 168         TOMOYO_ID_ACL,
 169         TOMOYO_ID_DOMAIN,
 170         TOMOYO_MAX_POLICY
 171 };
 172
 173 /* Index numbers for domain's attributes. */
 174 enum tomoyo_domain_info_flags_index {
 175         /* Quota warnning flag.   */
 176         TOMOYO_DIF_QUOTA_WARNED,
 177         /*
 178          * This domain was unable to create a new domain at
 179          * tomoyo_find_next_domain() because the name of the domain to be
 180          * created was too long or it could not allocate memory.
 181          * More than one process continued execve() without domain transition.
 182          */
 183         TOMOYO_DIF_TRANSITION_FAILED,
 184         TOMOYO_MAX_DOMAIN_INFO_FLAGS
 185 };
 186
 187 /* Index numbers for audit type. */
 188 enum tomoyo_grant_log {
 189         /* Follow profile's configuration. */
 190         TOMOYO_GRANTLOG_AUTO,
 191         /* Do not generate grant log. */
 192         TOMOYO_GRANTLOG_NO,
 193         /* Generate grant_log. */
 194         TOMOYO_GRANTLOG_YES,
 195 };
 196
 197 /* Index numbers for group entries. */
 198 enum tomoyo_group_id {
 199         TOMOYO_PATH_GROUP,
 200         TOMOYO_NUMBER_GROUP,
 201         TOMOYO_ADDRESS_GROUP,
 202         TOMOYO_MAX_GROUP
 203 };
 204
 205 /* Index numbers for type of numeric values. */
 206 enum tomoyo_value_type {
 207         TOMOYO_VALUE_TYPE_INVALID,
 208         TOMOYO_VALUE_TYPE_DECIMAL,
 209         TOMOYO_VALUE_TYPE_OCTAL,
 210         TOMOYO_VALUE_TYPE_HEXADECIMAL,
 211 };
 212
 213 /* Index numbers for domain transition control keywords. */
 214 enum tomoyo_transition_type {
 215         /* Do not change this order, */
 216         TOMOYO_TRANSITION_CONTROL_NO_RESET,
 217         TOMOYO_TRANSITION_CONTROL_RESET,
 218         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 219         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 220         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 221         TOMOYO_TRANSITION_CONTROL_KEEP,
 222         TOMOYO_MAX_TRANSITION_TYPE
 223 };
 224
 225 /* Index numbers for Access Controls. */
 226 enum tomoyo_acl_entry_type_index {
 227         TOMOYO_TYPE_PATH_ACL,
 228         TOMOYO_TYPE_PATH2_ACL,
 229         TOMOYO_TYPE_PATH_NUMBER_ACL,
 230         TOMOYO_TYPE_MKDEV_ACL,
 231         TOMOYO_TYPE_MOUNT_ACL,
 232         TOMOYO_TYPE_INET_ACL,
 233         TOMOYO_TYPE_UNIX_ACL,
 234         TOMOYO_TYPE_ENV_ACL,
 235         TOMOYO_TYPE_MANUAL_TASK_ACL,
 236 };
 237
 238 /* Index numbers for access controls with one pathname. */
 239 enum tomoyo_path_acl_index {
 240         TOMOYO_TYPE_EXECUTE,
 241         TOMOYO_TYPE_READ,
 242         TOMOYO_TYPE_WRITE,
 243         TOMOYO_TYPE_APPEND,
 244         TOMOYO_TYPE_UNLINK,
 245         TOMOYO_TYPE_GETATTR,
 246         TOMOYO_TYPE_RMDIR,
 247         TOMOYO_TYPE_TRUNCATE,
 248         TOMOYO_TYPE_SYMLINK,
 249         TOMOYO_TYPE_CHROOT,
 250         TOMOYO_TYPE_UMOUNT,
 251         TOMOYO_MAX_PATH_OPERATION
 252 };
 253
 254 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 255 enum tomoyo_memory_stat_type {
 256         TOMOYO_MEMORY_POLICY,
 257         TOMOYO_MEMORY_AUDIT,
 258         TOMOYO_MEMORY_QUERY,
 259         TOMOYO_MAX_MEMORY_STAT
 260 };
 261
 262 enum tomoyo_mkdev_acl_index {
 263         TOMOYO_TYPE_MKBLOCK,
 264         TOMOYO_TYPE_MKCHAR,
 265         TOMOYO_MAX_MKDEV_OPERATION
 266 };
 267
 268 /* Index numbers for socket operations. */
 269 enum tomoyo_network_acl_index {
 270         TOMOYO_NETWORK_BIND,    /* bind() operation. */
 271         TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
 272         TOMOYO_NETWORK_CONNECT, /* connect() operation. */
 273         TOMOYO_NETWORK_SEND,    /* send() operation. */
 274         TOMOYO_MAX_NETWORK_OPERATION
 275 };
 276
 277 /* Index numbers for access controls with two pathnames. */
 278 enum tomoyo_path2_acl_index {
 279         TOMOYO_TYPE_LINK,
 280         TOMOYO_TYPE_RENAME,
 281         TOMOYO_TYPE_PIVOT_ROOT,
 282         TOMOYO_MAX_PATH2_OPERATION
 283 };
 284
 285 /* Index numbers for access controls with one pathname and one number. */
 286 enum tomoyo_path_number_acl_index {
 287         TOMOYO_TYPE_CREATE,
 288         TOMOYO_TYPE_MKDIR,
 289         TOMOYO_TYPE_MKFIFO,
 290         TOMOYO_TYPE_MKSOCK,
 291         TOMOYO_TYPE_IOCTL,
 292         TOMOYO_TYPE_CHMOD,
 293         TOMOYO_TYPE_CHOWN,
 294         TOMOYO_TYPE_CHGRP,
 295         TOMOYO_MAX_PATH_NUMBER_OPERATION
 296 };
 297
 298 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 299 enum tomoyo_securityfs_interface_index {
 300         TOMOYO_DOMAINPOLICY,
 301         TOMOYO_EXCEPTIONPOLICY,
 302         TOMOYO_PROCESS_STATUS,
 303         TOMOYO_STAT,
 304         TOMOYO_AUDIT,
 305         TOMOYO_VERSION,
 306         TOMOYO_PROFILE,
 307         TOMOYO_QUERY,
 308         TOMOYO_MANAGER
 309 };
 310
 311 /* Index numbers for special mount operations. */
 312 enum tomoyo_special_mount {
 313         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 314         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 315         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 316         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 317         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 318         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 319         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 320         TOMOYO_MAX_SPECIAL_MOUNT
 321 };
 322
 323 /* Index numbers for functionality. */
 324 enum tomoyo_mac_index {
 325         TOMOYO_MAC_FILE_EXECUTE,
 326         TOMOYO_MAC_FILE_OPEN,
 327         TOMOYO_MAC_FILE_CREATE,
 328         TOMOYO_MAC_FILE_UNLINK,
 329         TOMOYO_MAC_FILE_GETATTR,
 330         TOMOYO_MAC_FILE_MKDIR,
 331         TOMOYO_MAC_FILE_RMDIR,
 332         TOMOYO_MAC_FILE_MKFIFO,
 333         TOMOYO_MAC_FILE_MKSOCK,
 334         TOMOYO_MAC_FILE_TRUNCATE,
 335         TOMOYO_MAC_FILE_SYMLINK,
 336         TOMOYO_MAC_FILE_MKBLOCK,
 337         TOMOYO_MAC_FILE_MKCHAR,
 338         TOMOYO_MAC_FILE_LINK,
 339         TOMOYO_MAC_FILE_RENAME,
 340         TOMOYO_MAC_FILE_CHMOD,
 341         TOMOYO_MAC_FILE_CHOWN,
 342         TOMOYO_MAC_FILE_CHGRP,
 343         TOMOYO_MAC_FILE_IOCTL,
 344         TOMOYO_MAC_FILE_CHROOT,
 345         TOMOYO_MAC_FILE_MOUNT,
 346         TOMOYO_MAC_FILE_UMOUNT,
 347         TOMOYO_MAC_FILE_PIVOT_ROOT,
 348         TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
 349         TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
 350         TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
 351         TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
 352         TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
 353         TOMOYO_MAC_NETWORK_INET_RAW_BIND,
 354         TOMOYO_MAC_NETWORK_INET_RAW_SEND,
 355         TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
 356         TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
 357         TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
 358         TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
 359         TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
 360         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
 361         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
 362         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 363         TOMOYO_MAC_ENVIRON,
 364         TOMOYO_MAX_MAC_INDEX
 365 };
 366
 367 /* Index numbers for category of functionality. */
 368 enum tomoyo_mac_category_index {
 369         TOMOYO_MAC_CATEGORY_FILE,
 370         TOMOYO_MAC_CATEGORY_NETWORK,
 371         TOMOYO_MAC_CATEGORY_MISC,
 372         TOMOYO_MAX_MAC_CATEGORY_INDEX
 373 };
 374
 375 /*
 376  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 377  * occurred in enforcing mode and the userspace daemon decided to retry.
 378  *
 379  * We must choose a positive value in order to distinguish "granted" (which is
 380  * 0) and "rejected" (which is a negative value) and "retry".
 381  */
 382 #define TOMOYO_RETRY_REQUEST 1
 383
 384 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 385 enum tomoyo_policy_stat_type {
 386         /* Do not change this order. */
 387         TOMOYO_STAT_POLICY_UPDATES,
 388         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 389         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 390         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 391         TOMOYO_MAX_POLICY_STAT
 392 };
 393
 394 /* Index numbers for profile's PREFERENCE values. */
 395 enum tomoyo_pref_index {
 396         TOMOYO_PREF_MAX_AUDIT_LOG,
 397         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 398         TOMOYO_MAX_PREF
 399 };
 400
 401 /********** Structure definitions. **********/
 402
 403 /* Common header for holding ACL entries. */
 404 struct tomoyo_acl_head {
 405         struct list_head list;
 406         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 407 } __packed;
 408
 409 /* Common header for shared entries. */
 410 struct tomoyo_shared_acl_head {
 411         struct list_head list;
 412         atomic_t users;
 413 } __packed;
 414
 415 struct tomoyo_policy_namespace;
 416
 417 /* Structure for request info. */
 418 struct tomoyo_request_info {
 419         /*
 420          * For holding parameters specific to operations which deal files.
 421          * NULL if not dealing files.
 422          */
 423         struct tomoyo_obj_info *obj;
 424         /*
 425          * For holding parameters specific to execve() request.
 426          * NULL if not dealing do_execve().
 427          */
 428         struct tomoyo_execve *ee;
 429         struct tomoyo_domain_info *domain;
 430         /* For holding parameters. */
 431         union {
 432                 struct {
 433                         const struct tomoyo_path_info *filename;
 434                         /* For using wildcards at tomoyo_find_next_domain(). */
 435                         const struct tomoyo_path_info *matched_path;
 436                         /* One of values in "enum tomoyo_path_acl_index". */
 437                         u8 operation;
 438                 } path;
 439                 struct {
 440                         const struct tomoyo_path_info *filename1;
 441                         const struct tomoyo_path_info *filename2;
 442                         /* One of values in "enum tomoyo_path2_acl_index". */
 443                         u8 operation;
 444                 } path2;
 445                 struct {
 446                         const struct tomoyo_path_info *filename;
 447                         unsigned int mode;
 448                         unsigned int major;
 449                         unsigned int minor;
 450                         /* One of values in "enum tomoyo_mkdev_acl_index". */
 451                         u8 operation;
 452                 } mkdev;
 453                 struct {
 454                         const struct tomoyo_path_info *filename;
 455                         unsigned long number;
 456                         /*
 457                          * One of values in
 458                          * "enum tomoyo_path_number_acl_index".
 459                          */
 460                         u8 operation;
 461                 } path_number;
 462                 struct {
 463                         const struct tomoyo_path_info *name;
 464                 } environ;
 465                 struct {
 466                         const __be32 *address;
 467                         u16 port;
 468                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 469                         u8 protocol;
 470                         /* One of values in "enum tomoyo_network_acl_index". */
 471                         u8 operation;
 472                         bool is_ipv6;
 473                 } inet_network;
 474                 struct {
 475                         const struct tomoyo_path_info *address;
 476                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 477                         u8 protocol;
 478                         /* One of values in "enum tomoyo_network_acl_index". */
 479                         u8 operation;
 480                 } unix_network;
 481                 struct {
 482                         const struct tomoyo_path_info *type;
 483                         const struct tomoyo_path_info *dir;
 484                         const struct tomoyo_path_info *dev;
 485                         unsigned long flags;
 486                         int need_dev;
 487                 } mount;
 488                 struct {
 489                         const struct tomoyo_path_info *domainname;
 490                 } task;
 491         } param;
 492         struct tomoyo_acl_info *matched_acl;
 493         u8 param_type;
 494         bool granted;
 495         u8 retry;
 496         u8 profile;
 497         u8 mode; /* One of tomoyo_mode_index . */
 498         u8 type;
 499 };
 500
 501 /* Structure for holding a token. */
 502 struct tomoyo_path_info {
 503         const char *name;
 504         u32 hash;          /* = full_name_hash(name, strlen(name)) */
 505         u16 const_len;     /* = tomoyo_const_part_length(name)     */
 506         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 507         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 508 };
 509
 510 /* Structure for holding string data. */
 511 struct tomoyo_name {
 512         struct tomoyo_shared_acl_head head;
 513         struct tomoyo_path_info entry;
 514 };
 515
 516 /* Structure for holding a word. */
 517 struct tomoyo_name_union {
 518         /* Either @filename or @group is NULL. */
 519         const struct tomoyo_path_info *filename;
 520         struct tomoyo_group *group;
 521 };
 522
 523 /* Structure for holding a number. */
 524 struct tomoyo_number_union {
 525         unsigned long values[2];
 526         struct tomoyo_group *group; /* Maybe NULL. */
 527         /* One of values in "enum tomoyo_value_type". */
 528         u8 value_type[2];
 529 };
 530
 531 /* Structure for holding an IP address. */
 532 struct tomoyo_ipaddr_union {
 533         struct in6_addr ip[2]; /* Big endian. */
 534         struct tomoyo_group *group; /* Pointer to address group. */
 535         bool is_ipv6; /* Valid only if @group == NULL. */
 536 };
 537
 538 /* Structure for "path_group"/"number_group"/"address_group" directive. */
 539 struct tomoyo_group {
 540         struct tomoyo_shared_acl_head head;
 541         const struct tomoyo_path_info *group_name;
 542         struct list_head member_list;
 543 };
 544
 545 /* Structure for "path_group" directive. */
 546 struct tomoyo_path_group {
 547         struct tomoyo_acl_head head;
 548         const struct tomoyo_path_info *member_name;
 549 };
 550
 551 /* Structure for "number_group" directive. */
 552 struct tomoyo_number_group {
 553         struct tomoyo_acl_head head;
 554         struct tomoyo_number_union number;
 555 };
 556
 557 /* Structure for "address_group" directive. */
 558 struct tomoyo_address_group {
 559         struct tomoyo_acl_head head;
 560         /* Structure for holding an IP address. */
 561         struct tomoyo_ipaddr_union address;
 562 };
 563
 564 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
 565 struct tomoyo_mini_stat {
 566         kuid_t uid;
 567         kgid_t gid;
 568         ino_t ino;
 569         umode_t mode;
 570         dev_t dev;
 571         dev_t rdev;
 572 };
 573
 574 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
 575 struct tomoyo_page_dump {
 576         struct page *page;    /* Previously dumped page. */
 577         char *data;           /* Contents of "page". Size is PAGE_SIZE. */
 578 };
 579
 580 /* Structure for attribute checks in addition to pathname checks. */
 581 struct tomoyo_obj_info {
 582         /*
 583          * True if tomoyo_get_attributes() was already called, false otherwise.
 584          */
 585         bool validate_done;
 586         /* True if @stat[] is valid. */
 587         bool stat_valid[TOMOYO_MAX_PATH_STAT];
 588         /* First pathname. Initialized with { NULL, NULL } if no path. */
 589         struct path path1;
 590         /* Second pathname. Initialized with { NULL, NULL } if no path. */
 591         struct path path2;
 592         /*
 593          * Information on @path1, @path1's parent directory, @path2, @path2's
 594          * parent directory.
 595          */
 596         struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
 597         /*
 598          * Content of symbolic link to be created. NULL for operations other
 599          * than symlink().
 600          */
 601         struct tomoyo_path_info *symlink_target;
 602 };
 603
 604 /* Structure for argv[]. */
 605 struct tomoyo_argv {
 606         unsigned long index;
 607         const struct tomoyo_path_info *value;
 608         bool is_not;
 609 };
 610
 611 /* Structure for envp[]. */
 612 struct tomoyo_envp {
 613         const struct tomoyo_path_info *name;
 614         const struct tomoyo_path_info *value;
 615         bool is_not;
 616 };
 617
 618 /* Structure for execve() operation. */
 619 struct tomoyo_execve {
 620         struct tomoyo_request_info r;
 621         struct tomoyo_obj_info obj;
 622         struct linux_binprm *bprm;
 623         const struct tomoyo_path_info *transition;
 624         /* For dumping argv[] and envp[]. */
 625         struct tomoyo_page_dump dump;
 626         /* For temporary use. */
 627         char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
 628 };
 629
 630 /* Structure for entries which follows "struct tomoyo_condition". */
 631 struct tomoyo_condition_element {
 632         /*
 633          * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
 634          * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
 635          * of the array of this struct.
 636          */
 637         u8 left;
 638         /*
 639          * Right hand operand. A "struct tomoyo_number_union" for
 640          * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
 641          * TOMOYO_NAME_UNION is attached to the tail of the array of this
 642          * struct.
 643          */
 644         u8 right;
 645         /* Equation operator. True if equals or overlaps, false otherwise. */
 646         bool equals;
 647 };
 648
 649 /* Structure for optional arguments. */
 650 struct tomoyo_condition {
 651         struct tomoyo_shared_acl_head head;
 652         u32 size; /* Memory size allocated for this entry. */
 653         u16 condc; /* Number of conditions in this struct. */
 654         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 655         u16 names_count; /* Number of "struct tomoyo_name_union names". */
 656         u16 argc; /* Number of "struct tomoyo_argv". */
 657         u16 envc; /* Number of "struct tomoyo_envp". */
 658         u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
 659         const struct tomoyo_path_info *transit; /* Maybe NULL. */
 660         /*
 661          * struct tomoyo_condition_element condition[condc];
 662          * struct tomoyo_number_union values[numbers_count];
 663          * struct tomoyo_name_union names[names_count];
 664          * struct tomoyo_argv argv[argc];
 665          * struct tomoyo_envp envp[envc];
 666          */
 667 };
 668
 669 /* Common header for individual entries. */
 670 struct tomoyo_acl_info {
 671         struct list_head list;
 672         struct tomoyo_condition *cond; /* Maybe NULL. */
 673         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 674         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 675 } __packed;
 676
 677 /* Structure for domain information. */
 678 struct tomoyo_domain_info {
 679         struct list_head list;
 680         struct list_head acl_info_list;
 681         /* Name of this domain. Never NULL.          */
 682         const struct tomoyo_path_info *domainname;
 683         /* Namespace for this domain. Never NULL. */
 684         struct tomoyo_policy_namespace *ns;
 685         u8 profile;        /* Profile number to use. */
 686         u8 group;          /* Group number to use.   */
 687         bool is_deleted;   /* Delete flag.           */
 688         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 689         atomic_t users; /* Number of referring credentials. */
 690 };
 691
 692 /*
 693  * Structure for "task manual_domain_transition" directive.
 694  */
 695 struct tomoyo_task_acl {
 696         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
 697         /* Pointer to domainname. */
 698         const struct tomoyo_path_info *domainname;
 699 };
 700
 701 /*
 702  * Structure for "file execute", "file read", "file write", "file append",
 703  * "file unlink", "file getattr", "file rmdir", "file truncate",
 704  * "file symlink", "file chroot" and "file unmount" directive.
 705  */
 706 struct tomoyo_path_acl {
 707         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 708         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 709         struct tomoyo_name_union name;
 710 };
 711
 712 /*
 713  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 714  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 715  */
 716 struct tomoyo_path_number_acl {
 717         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 718         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 719         u8 perm;
 720         struct tomoyo_name_union name;
 721         struct tomoyo_number_union number;
 722 };
 723
 724 /* Structure for "file mkblock" and "file mkchar" directive. */
 725 struct tomoyo_mkdev_acl {
 726         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 727         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 728         struct tomoyo_name_union name;
 729         struct tomoyo_number_union mode;
 730         struct tomoyo_number_union major;
 731         struct tomoyo_number_union minor;
 732 };
 733
 734 /*
 735  * Structure for "file rename", "file link" and "file pivot_root" directive.
 736  */
 737 struct tomoyo_path2_acl {
 738         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 739         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 740         struct tomoyo_name_union name1;
 741         struct tomoyo_name_union name2;
 742 };
 743
 744 /* Structure for "file mount" directive. */
 745 struct tomoyo_mount_acl {
 746         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 747         struct tomoyo_name_union dev_name;
 748         struct tomoyo_name_union dir_name;
 749         struct tomoyo_name_union fs_type;
 750         struct tomoyo_number_union flags;
 751 };
 752
 753 /* Structure for "misc env" directive in domain policy. */
 754 struct tomoyo_env_acl {
 755         struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
 756         const struct tomoyo_path_info *env; /* environment variable */
 757 };
 758
 759 /* Structure for "network inet" directive. */
 760 struct tomoyo_inet_acl {
 761         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
 762         u8 protocol;
 763         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 764         struct tomoyo_ipaddr_union address;
 765         struct tomoyo_number_union port;
 766 };
 767
 768 /* Structure for "network unix" directive. */
 769 struct tomoyo_unix_acl {
 770         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
 771         u8 protocol;
 772         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 773         struct tomoyo_name_union name;
 774 };
 775
 776 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 777 struct tomoyo_acl_param {
 778         char *data;
 779         struct list_head *list;
 780         struct tomoyo_policy_namespace *ns;
 781         bool is_delete;
 782 };
 783
 784 #define TOMOYO_MAX_IO_READ_QUEUE 64
 785
 786 /*
 787  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 788  * interfaces.
 789  */
 790 struct tomoyo_io_buffer {
 791         void (*read) (struct tomoyo_io_buffer *);
 792         int (*write) (struct tomoyo_io_buffer *);
 793         unsigned int (*poll) (struct file *file, poll_table *wait);
 794         /* Exclusive lock for this structure.   */
 795         struct mutex io_sem;
 796         char __user *read_user_buf;
 797         size_t read_user_buf_avail;
 798         struct {
 799                 struct list_head *ns;
 800                 struct list_head *domain;
 801                 struct list_head *group;
 802                 struct list_head *acl;
 803                 size_t avail;
 804                 unsigned int step;
 805                 unsigned int query_index;
 806                 u16 index;
 807                 u16 cond_index;
 808                 u8 acl_group_index;
 809                 u8 cond_step;
 810                 u8 bit;
 811                 u8 w_pos;
 812                 bool eof;
 813                 bool print_this_domain_only;
 814                 bool print_transition_related_only;
 815                 bool print_cond_part;
 816                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 817         } r;
 818         struct {
 819                 struct tomoyo_policy_namespace *ns;
 820                 /* The position currently writing to.   */
 821                 struct tomoyo_domain_info *domain;
 822                 /* Bytes available for writing.         */
 823                 size_t avail;
 824                 bool is_delete;
 825         } w;
 826         /* Buffer for reading.                  */
 827         char *read_buf;
 828         /* Size of read buffer.                 */
 829         size_t readbuf_size;
 830         /* Buffer for writing.                  */
 831         char *write_buf;
 832         /* Size of write buffer.                */
 833         size_t writebuf_size;
 834         /* Type of this interface.              */
 835         enum tomoyo_securityfs_interface_index type;
 836         /* Users counter protected by tomoyo_io_buffer_list_lock. */
 837         u8 users;
 838         /* List for telling GC not to kfree() elements. */
 839         struct list_head list;
 840 };
 841
 842 /*
 843  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 844  * "no_keep_domain" keyword.
 845  */
 846 struct tomoyo_transition_control {
 847         struct tomoyo_acl_head head;
 848         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 849         /* True if the domainname is tomoyo_get_last_name(). */
 850         bool is_last_name;
 851         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 852         const struct tomoyo_path_info *program;    /* Maybe NULL */
 853 };
 854
 855 /* Structure for "aggregator" keyword. */
 856 struct tomoyo_aggregator {
 857         struct tomoyo_acl_head head;
 858         const struct tomoyo_path_info *original_name;
 859         const struct tomoyo_path_info *aggregated_name;
 860 };
 861
 862 /* Structure for policy manager. */
 863 struct tomoyo_manager {
 864         struct tomoyo_acl_head head;
 865         /* A path to program or a domainname. */
 866         const struct tomoyo_path_info *manager;
 867 };
 868
 869 struct tomoyo_preference {
 870         unsigned int learning_max_entry;
 871         bool enforcing_verbose;
 872         bool learning_verbose;
 873         bool permissive_verbose;
 874 };
 875
 876 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 877 struct tomoyo_profile {
 878         const struct tomoyo_path_info *comment;
 879         struct tomoyo_preference *learning;
 880         struct tomoyo_preference *permissive;
 881         struct tomoyo_preference *enforcing;
 882         struct tomoyo_preference preference;
 883         u8 default_config;
 884         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 885         unsigned int pref[TOMOYO_MAX_PREF];
 886 };
 887
 888 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 889 struct tomoyo_time {
 890         u16 year;
 891         u8 month;
 892         u8 day;
 893         u8 hour;
 894         u8 min;
 895         u8 sec;
 896 };
 897
 898 /* Structure for policy namespace. */
 899 struct tomoyo_policy_namespace {
 900         /* Profile table. Memory is allocated as needed. */
 901         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 902         /* List of "struct tomoyo_group". */
 903         struct list_head group_list[TOMOYO_MAX_GROUP];
 904         /* List of policy. */
 905         struct list_head policy_list[TOMOYO_MAX_POLICY];
 906         /* The global ACL referred by "use_group" keyword. */
 907         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 908         /* List for connecting to tomoyo_namespace_list list. */
 909         struct list_head namespace_list;
 910         /* Profile version. Currently only 20110903 is defined. */
 911         unsigned int profile_version;
 912         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 913         const char *name;
 914 };
 915
 916 /********** Function prototypes. **********/
 917
 918 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
 919                                   const struct tomoyo_group *group);
 920 bool tomoyo_compare_number_union(const unsigned long value,
 921                                  const struct tomoyo_number_union *ptr);
 922 bool tomoyo_condition(struct tomoyo_request_info *r,
 923                       const struct tomoyo_condition *cond);
 924 bool tomoyo_correct_domain(const unsigned char *domainname);
 925 bool tomoyo_correct_path(const char *filename);
 926 bool tomoyo_correct_word(const char *string);
 927 bool tomoyo_domain_def(const unsigned char *buffer);
 928 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 929 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
 930                       struct tomoyo_page_dump *dump);
 931 bool tomoyo_memory_ok(void *ptr);
 932 bool tomoyo_number_matches_group(const unsigned long min,
 933                                  const unsigned long max,
 934                                  const struct tomoyo_group *group);
 935 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
 936                                struct tomoyo_ipaddr_union *ptr);
 937 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 938                              struct tomoyo_name_union *ptr);
 939 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 940                                struct tomoyo_number_union *ptr);
 941 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 942                                  const struct tomoyo_path_info *pattern);
 943 bool tomoyo_permstr(const char *string, const char *keyword);
 944 bool tomoyo_str_starts(char **src, const char *find);
 945 char *tomoyo_encode(const char *str);
 946 char *tomoyo_encode2(const char *str, int str_len);
 947 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 948                       va_list args);
 949 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 950 char *tomoyo_realpath_from_path(const struct path *path);
 951 char *tomoyo_realpath_nofollow(const char *pathname);
 952 const char *tomoyo_get_exe(void);
 953 const char *tomoyo_yesno(const unsigned int value);
 954 const struct tomoyo_path_info *tomoyo_compare_name_union
 955 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 956 const struct tomoyo_path_info *tomoyo_get_domainname
 957 (struct tomoyo_acl_param *param);
 958 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 959 const struct tomoyo_path_info *tomoyo_path_matches_group
 960 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 961 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 962                                  const struct path *path, const int flag);
 963 void tomoyo_close_control(struct tomoyo_io_buffer *head);
 964 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 965 int tomoyo_execute_permission(struct tomoyo_request_info *r,
 966                               const struct tomoyo_path_info *filename);
 967 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 968 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 969                     const u8 index);
 970 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 971                              struct tomoyo_domain_info *domain,
 972                              const u8 index);
 973 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
 974                       const unsigned int mode, unsigned int dev);
 975 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
 976                             const char *type, unsigned long flags,
 977                             void *data_page);
 978 int tomoyo_open_control(const u8 type, struct file *file);
 979 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
 980                       const struct path *path2);
 981 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
 982                             unsigned long number);
 983 int tomoyo_path_perm(const u8 operation, const struct path *path,
 984                      const char *target);
 985 unsigned int tomoyo_poll_control(struct file *file, poll_table *wait);
 986 unsigned int tomoyo_poll_log(struct file *file, poll_table *wait);
 987 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
 988                                   int addr_len);
 989 int tomoyo_socket_connect_permission(struct socket *sock,
 990                                      struct sockaddr *addr, int addr_len);
 991 int tomoyo_socket_listen_permission(struct socket *sock);
 992 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
 993                                      int size);
 994 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 995         __printf(2, 3);
 996 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 997                          struct tomoyo_acl_param *param,
 998                          bool (*check_duplicate)
 999                          (const struct tomoyo_acl_info *,
1000                           const struct tomoyo_acl_info *),
1001                          bool (*merge_duplicate)
1002                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1003                           const bool));
1004 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1005                          struct tomoyo_acl_param *param,
1006                          bool (*check_duplicate)
1007                          (const struct tomoyo_acl_head *,
1008                           const struct tomoyo_acl_head *));
1009 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1010 int tomoyo_write_file(struct tomoyo_acl_param *param);
1011 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1012 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1013 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1014 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1015                                     const u8 type);
1016 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1017 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1018                             const int buffer_len);
1019 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1020                              const char __user *buffer, const int buffer_len);
1021 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1022 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1023                                                 const bool transit);
1024 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1025 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1026                                       const u8 idx);
1027 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1028 (const char *domainname);
1029 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1030                                       const u8 profile);
1031 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1032                                 const u8 index);
1033 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1034 void *tomoyo_commit_ok(void *data, const unsigned int size);
1035 void __init tomoyo_load_builtin_policy(void);
1036 void __init tomoyo_mm_init(void);
1037 void tomoyo_check_acl(struct tomoyo_request_info *r,
1038                       bool (*check_entry) (struct tomoyo_request_info *,
1039                                            const struct tomoyo_acl_info *));
1040 void tomoyo_check_profile(void);
1041 void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1042 void tomoyo_del_condition(struct list_head *element);
1043 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1044 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1045 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1046 void tomoyo_load_policy(const char *filename);
1047 void tomoyo_normalize_line(unsigned char *buffer);
1048 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1049 void tomoyo_print_ip(char *buf, const unsigned int size,
1050                      const struct tomoyo_ipaddr_union *ptr);
1051 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1052                         const unsigned long value, const u8 type);
1053 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1054 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1055 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1056 void tomoyo_update_stat(const u8 index);
1057 void tomoyo_warn_oom(const char *function);
1058 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1059         __printf(2, 3);
1060 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1061                        va_list args);
1062
1063 /********** External variable definitions. **********/
1064
1065 extern bool tomoyo_policy_loaded;
1066 extern bool tomoyo_enabled;
1067 extern const char * const tomoyo_condition_keyword
1068 [TOMOYO_MAX_CONDITION_KEYWORD];
1069 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1070 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1071                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1072 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1073 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1074 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1075 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1076 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1077 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1078 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1079 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1080 extern struct list_head tomoyo_condition_list;
1081 extern struct list_head tomoyo_domain_list;
1082 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1083 extern struct list_head tomoyo_namespace_list;
1084 extern struct mutex tomoyo_policy_lock;
1085 extern struct srcu_struct tomoyo_ss;
1086 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1087 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1088 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1089 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1090
1091 /********** Inlined functions. **********/
1092
1093 /**
1094  * tomoyo_read_lock - Take lock for protecting policy.
1095  *
1096  * Returns index number for tomoyo_read_unlock().
1097  */
1098 static inline int tomoyo_read_lock(void)
1099 {
1100         return srcu_read_lock(&tomoyo_ss);
1101 }
1102
1103 /**
1104  * tomoyo_read_unlock - Release lock for protecting policy.
1105  *
1106  * @idx: Index number returned by tomoyo_read_lock().
1107  *
1108  * Returns nothing.
1109  */
1110 static inline void tomoyo_read_unlock(int idx)
1111 {
1112         srcu_read_unlock(&tomoyo_ss, idx);
1113 }
1114
1115 /**
1116  * tomoyo_sys_getppid - Copy of getppid().
1117  *
1118  * Returns parent process's PID.
1119  *
1120  * Alpha does not have getppid() defined. To be able to build this module on
1121  * Alpha, I have to copy getppid() from kernel/timer.c.
1122  */
1123 static inline pid_t tomoyo_sys_getppid(void)
1124 {
1125         pid_t pid;
1126         rcu_read_lock();
1127         pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1128         rcu_read_unlock();
1129         return pid;
1130 }
1131
1132 /**
1133  * tomoyo_sys_getpid - Copy of getpid().
1134  *
1135  * Returns current thread's PID.
1136  *
1137  * Alpha does not have getpid() defined. To be able to build this module on
1138  * Alpha, I have to copy getpid() from kernel/timer.c.
1139  */
1140 static inline pid_t tomoyo_sys_getpid(void)
1141 {
1142         return task_tgid_vnr(current);
1143 }
1144
1145 /**
1146  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1147  *
1148  * @a: Pointer to "struct tomoyo_path_info".
1149  * @b: Pointer to "struct tomoyo_path_info".
1150  *
1151  * Returns true if @a == @b, false otherwise.
1152  */
1153 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1154                                   const struct tomoyo_path_info *b)
1155 {
1156         return a->hash != b->hash || strcmp(a->name, b->name);
1157 }
1158
1159 /**
1160  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1161  *
1162  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1163  *
1164  * Returns nothing.
1165  */
1166 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1167 {
1168         if (name) {
1169                 struct tomoyo_name *ptr =
1170                         container_of(name, typeof(*ptr), entry);
1171                 atomic_dec(&ptr->head.users);
1172         }
1173 }
1174
1175 /**
1176  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1177  *
1178  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1179  *
1180  * Returns nothing.
1181  */
1182 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1183 {
1184         if (cond)
1185                 atomic_dec(&cond->head.users);
1186 }
1187
1188 /**
1189  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1190  *
1191  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1192  *
1193  * Returns nothing.
1194  */
1195 static inline void tomoyo_put_group(struct tomoyo_group *group)
1196 {
1197         if (group)
1198                 atomic_dec(&group->head.users);
1199 }
1200
1201 /**
1202  * tomoyo_cred - Get a pointer to the tomoyo cred security blob
1203  * @cred - the relevant cred
1204  *
1205  * Returns pointer to the tomoyo cred blob.
1206  */
1207 static inline struct tomoyo_domain_info **tomoyo_cred(const struct cred *cred)
1208 {
1209         return cred->security;
1210 }
1211
1212 /**
1213  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1214  *
1215  * Returns pointer to "struct tomoyo_domain_info" for current thread.
1216  */
1217 static inline struct tomoyo_domain_info *tomoyo_domain(void)
1218 {
1219         struct tomoyo_domain_info **blob = tomoyo_cred(current_cred());
1220
1221         return *blob;
1222 }
1223
1224 /**
1225  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1226  *
1227  * @task: Pointer to "struct task_struct".
1228  *
1229  * Returns pointer to "struct tomoyo_security" for specified thread.
1230  */
1231 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1232                                                             *task)
1233 {
1234         struct tomoyo_domain_info **blob = tomoyo_cred(get_task_cred(task));
1235
1236         return *blob;
1237 }
1238
1239 /**
1240  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1241  *
1242  * @a: Pointer to "struct tomoyo_name_union".
1243  * @b: Pointer to "struct tomoyo_name_union".
1244  *
1245  * Returns true if @a == @b, false otherwise.
1246  */
1247 static inline bool tomoyo_same_name_union
1248 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1249 {
1250         return a->filename == b->filename && a->group == b->group;
1251 }
1252
1253 /**
1254  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1255  *
1256  * @a: Pointer to "struct tomoyo_number_union".
1257  * @b: Pointer to "struct tomoyo_number_union".
1258  *
1259  * Returns true if @a == @b, false otherwise.
1260  */
1261 static inline bool tomoyo_same_number_union
1262 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1263 {
1264         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1265                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1266                 a->value_type[1] == b->value_type[1];
1267 }
1268
1269 /**
1270  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1271  *
1272  * @a: Pointer to "struct tomoyo_ipaddr_union".
1273  * @b: Pointer to "struct tomoyo_ipaddr_union".
1274  *
1275  * Returns true if @a == @b, false otherwise.
1276  */
1277 static inline bool tomoyo_same_ipaddr_union
1278 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1279 {
1280         return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1281                 a->is_ipv6 == b->is_ipv6;
1282 }
1283
1284 /**
1285  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1286  *
1287  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1288  */
1289 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1290 {
1291         return tomoyo_domain()->ns;
1292 }
1293
1294 #if defined(CONFIG_SLOB)
1295
1296 /**
1297  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1298  *
1299  * @size: Size to be rounded up.
1300  *
1301  * Returns @size.
1302  *
1303  * Since SLOB does not round up, this function simply returns @size.
1304  */
1305 static inline int tomoyo_round2(size_t size)
1306 {
1307         return size;
1308 }
1309
1310 #else
1311
1312 /**
1313  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1314  *
1315  * @size: Size to be rounded up.
1316  *
1317  * Returns rounded size.
1318  *
1319  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1320  * (e.g.) 128 bytes.
1321  */
1322 static inline int tomoyo_round2(size_t size)
1323 {
1324 #if PAGE_SIZE == 4096
1325         size_t bsize = 32;
1326 #else
1327         size_t bsize = 64;
1328 #endif
1329         if (!size)
1330                 return 0;
1331         while (size > bsize)
1332                 bsize <<= 1;
1333         return bsize;
1334 }
1335
1336 #endif
1337
1338 /**
1339  * list_for_each_cookie - iterate over a list with cookie.
1340  * @pos:        the &struct list_head to use as a loop cursor.
1341  * @head:       the head for your list.
1342  */
1343 #define list_for_each_cookie(pos, head)                                 \
1344         if (!pos)                                                       \
1345                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1346         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1347
1348 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */