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 #define pr_fmt(fmt) fmt
  14
  15 #include <linux/ctype.h>
  16 #include <linux/string.h>
  17 #include <linux/mm.h>
  18 #include <linux/file.h>
  19 #include <linux/kmod.h>
  20 #include <linux/fs.h>
  21 #include <linux/sched.h>
  22 #include <linux/namei.h>
  23 #include <linux/mount.h>
  24 #include <linux/list.h>
  25 #include <linux/cred.h>
  26 #include <linux/poll.h>
  27 #include <linux/binfmts.h>
  28 #include <linux/highmem.h>
  29 #include <linux/net.h>
  30 #include <linux/inet.h>
  31 #include <linux/in.h>
  32 #include <linux/in6.h>
  33 #include <linux/un.h>
  34 #include <linux/lsm_hooks.h>
  35 #include <net/sock.h>
  36 #include <net/af_unix.h>
  37 #include <net/ip.h>
  38 #include <net/ipv6.h>
  39 #include <net/udp.h>
  40
  41 /********** Constants definitions. **********/
  42
  43 /*
  44  * TOMOYO uses this hash only when appending a string into the string
  45  * table. Frequency of appending strings is very low. So we don't need
  46  * large (e.g. 64k) hash size. 256 will be sufficient.
  47  */
  48 #define TOMOYO_HASH_BITS  8
  49 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  50
  51 /*
  52  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
  53  * Therefore, we don't need SOCK_MAX.
  54  */
  55 #define TOMOYO_SOCK_MAX 6
  56
  57 #define TOMOYO_EXEC_TMPSIZE     4096
  58
  59 /* Garbage collector is trying to kfree() this element. */
  60 #define TOMOYO_GC_IN_PROGRESS -1
  61
  62 /* Profile number is an integer between 0 and 255. */
  63 #define TOMOYO_MAX_PROFILES 256
  64
  65 /* Group number is an integer between 0 and 255. */
  66 #define TOMOYO_MAX_ACL_GROUPS 256
  67
  68 /* Index numbers for "struct tomoyo_condition". */
  69 enum tomoyo_conditions_index {
  70         TOMOYO_TASK_UID,             /* current_uid()   */
  71         TOMOYO_TASK_EUID,            /* current_euid()  */
  72         TOMOYO_TASK_SUID,            /* current_suid()  */
  73         TOMOYO_TASK_FSUID,           /* current_fsuid() */
  74         TOMOYO_TASK_GID,             /* current_gid()   */
  75         TOMOYO_TASK_EGID,            /* current_egid()  */
  76         TOMOYO_TASK_SGID,            /* current_sgid()  */
  77         TOMOYO_TASK_FSGID,           /* current_fsgid() */
  78         TOMOYO_TASK_PID,             /* sys_getpid()   */
  79         TOMOYO_TASK_PPID,            /* sys_getppid()  */
  80         TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
  81         TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
  82         TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
  83         TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
  84         TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
  85         TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
  86         TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
  87         TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
  88         TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
  89         TOMOYO_MODE_SETUID,          /* S_ISUID */
  90         TOMOYO_MODE_SETGID,          /* S_ISGID */
  91         TOMOYO_MODE_STICKY,          /* S_ISVTX */
  92         TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
  93         TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
  94         TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
  95         TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
  96         TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
  97         TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
  98         TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
  99         TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
 100         TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
 101         TOMOYO_EXEC_REALPATH,
 102         TOMOYO_SYMLINK_TARGET,
 103         TOMOYO_PATH1_UID,
 104         TOMOYO_PATH1_GID,
 105         TOMOYO_PATH1_INO,
 106         TOMOYO_PATH1_MAJOR,
 107         TOMOYO_PATH1_MINOR,
 108         TOMOYO_PATH1_PERM,
 109         TOMOYO_PATH1_TYPE,
 110         TOMOYO_PATH1_DEV_MAJOR,
 111         TOMOYO_PATH1_DEV_MINOR,
 112         TOMOYO_PATH2_UID,
 113         TOMOYO_PATH2_GID,
 114         TOMOYO_PATH2_INO,
 115         TOMOYO_PATH2_MAJOR,
 116         TOMOYO_PATH2_MINOR,
 117         TOMOYO_PATH2_PERM,
 118         TOMOYO_PATH2_TYPE,
 119         TOMOYO_PATH2_DEV_MAJOR,
 120         TOMOYO_PATH2_DEV_MINOR,
 121         TOMOYO_PATH1_PARENT_UID,
 122         TOMOYO_PATH1_PARENT_GID,
 123         TOMOYO_PATH1_PARENT_INO,
 124         TOMOYO_PATH1_PARENT_PERM,
 125         TOMOYO_PATH2_PARENT_UID,
 126         TOMOYO_PATH2_PARENT_GID,
 127         TOMOYO_PATH2_PARENT_INO,
 128         TOMOYO_PATH2_PARENT_PERM,
 129         TOMOYO_MAX_CONDITION_KEYWORD,
 130         TOMOYO_NUMBER_UNION,
 131         TOMOYO_NAME_UNION,
 132         TOMOYO_ARGV_ENTRY,
 133         TOMOYO_ENVP_ENTRY,
 134 };
 135
 136
 137 /* Index numbers for stat(). */
 138 enum tomoyo_path_stat_index {
 139         /* Do not change this order. */
 140         TOMOYO_PATH1,
 141         TOMOYO_PATH1_PARENT,
 142         TOMOYO_PATH2,
 143         TOMOYO_PATH2_PARENT,
 144         TOMOYO_MAX_PATH_STAT
 145 };
 146
 147 /* Index numbers for operation mode. */
 148 enum tomoyo_mode_index {
 149         TOMOYO_CONFIG_DISABLED,
 150         TOMOYO_CONFIG_LEARNING,
 151         TOMOYO_CONFIG_PERMISSIVE,
 152         TOMOYO_CONFIG_ENFORCING,
 153         TOMOYO_CONFIG_MAX_MODE,
 154         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
 155         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
 156         TOMOYO_CONFIG_USE_DEFAULT     = 255,
 157 };
 158
 159 /* Index numbers for entry type. */
 160 enum tomoyo_policy_id {
 161         TOMOYO_ID_GROUP,
 162         TOMOYO_ID_ADDRESS_GROUP,
 163         TOMOYO_ID_PATH_GROUP,
 164         TOMOYO_ID_NUMBER_GROUP,
 165         TOMOYO_ID_TRANSITION_CONTROL,
 166         TOMOYO_ID_AGGREGATOR,
 167         TOMOYO_ID_MANAGER,
 168         TOMOYO_ID_CONDITION,
 169         TOMOYO_ID_NAME,
 170         TOMOYO_ID_ACL,
 171         TOMOYO_ID_DOMAIN,
 172         TOMOYO_MAX_POLICY
 173 };
 174
 175 /* Index numbers for domain's attributes. */
 176 enum tomoyo_domain_info_flags_index {
 177         /* Quota warnning flag.   */
 178         TOMOYO_DIF_QUOTA_WARNED,
 179         /*
 180          * This domain was unable to create a new domain at
 181          * tomoyo_find_next_domain() because the name of the domain to be
 182          * created was too long or it could not allocate memory.
 183          * More than one process continued execve() without domain transition.
 184          */
 185         TOMOYO_DIF_TRANSITION_FAILED,
 186         TOMOYO_MAX_DOMAIN_INFO_FLAGS
 187 };
 188
 189 /* Index numbers for audit type. */
 190 enum tomoyo_grant_log {
 191         /* Follow profile's configuration. */
 192         TOMOYO_GRANTLOG_AUTO,
 193         /* Do not generate grant log. */
 194         TOMOYO_GRANTLOG_NO,
 195         /* Generate grant_log. */
 196         TOMOYO_GRANTLOG_YES,
 197 };
 198
 199 /* Index numbers for group entries. */
 200 enum tomoyo_group_id {
 201         TOMOYO_PATH_GROUP,
 202         TOMOYO_NUMBER_GROUP,
 203         TOMOYO_ADDRESS_GROUP,
 204         TOMOYO_MAX_GROUP
 205 };
 206
 207 /* Index numbers for type of numeric values. */
 208 enum tomoyo_value_type {
 209         TOMOYO_VALUE_TYPE_INVALID,
 210         TOMOYO_VALUE_TYPE_DECIMAL,
 211         TOMOYO_VALUE_TYPE_OCTAL,
 212         TOMOYO_VALUE_TYPE_HEXADECIMAL,
 213 };
 214
 215 /* Index numbers for domain transition control keywords. */
 216 enum tomoyo_transition_type {
 217         /* Do not change this order, */
 218         TOMOYO_TRANSITION_CONTROL_NO_RESET,
 219         TOMOYO_TRANSITION_CONTROL_RESET,
 220         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 221         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 222         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 223         TOMOYO_TRANSITION_CONTROL_KEEP,
 224         TOMOYO_MAX_TRANSITION_TYPE
 225 };
 226
 227 /* Index numbers for Access Controls. */
 228 enum tomoyo_acl_entry_type_index {
 229         TOMOYO_TYPE_PATH_ACL,
 230         TOMOYO_TYPE_PATH2_ACL,
 231         TOMOYO_TYPE_PATH_NUMBER_ACL,
 232         TOMOYO_TYPE_MKDEV_ACL,
 233         TOMOYO_TYPE_MOUNT_ACL,
 234         TOMOYO_TYPE_INET_ACL,
 235         TOMOYO_TYPE_UNIX_ACL,
 236         TOMOYO_TYPE_ENV_ACL,
 237         TOMOYO_TYPE_MANUAL_TASK_ACL,
 238 };
 239
 240 /* Index numbers for access controls with one pathname. */
 241 enum tomoyo_path_acl_index {
 242         TOMOYO_TYPE_EXECUTE,
 243         TOMOYO_TYPE_READ,
 244         TOMOYO_TYPE_WRITE,
 245         TOMOYO_TYPE_APPEND,
 246         TOMOYO_TYPE_UNLINK,
 247         TOMOYO_TYPE_GETATTR,
 248         TOMOYO_TYPE_RMDIR,
 249         TOMOYO_TYPE_TRUNCATE,
 250         TOMOYO_TYPE_SYMLINK,
 251         TOMOYO_TYPE_CHROOT,
 252         TOMOYO_TYPE_UMOUNT,
 253         TOMOYO_MAX_PATH_OPERATION
 254 };
 255
 256 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 257 enum tomoyo_memory_stat_type {
 258         TOMOYO_MEMORY_POLICY,
 259         TOMOYO_MEMORY_AUDIT,
 260         TOMOYO_MEMORY_QUERY,
 261         TOMOYO_MAX_MEMORY_STAT
 262 };
 263
 264 enum tomoyo_mkdev_acl_index {
 265         TOMOYO_TYPE_MKBLOCK,
 266         TOMOYO_TYPE_MKCHAR,
 267         TOMOYO_MAX_MKDEV_OPERATION
 268 };
 269
 270 /* Index numbers for socket operations. */
 271 enum tomoyo_network_acl_index {
 272         TOMOYO_NETWORK_BIND,    /* bind() operation. */
 273         TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
 274         TOMOYO_NETWORK_CONNECT, /* connect() operation. */
 275         TOMOYO_NETWORK_SEND,    /* send() operation. */
 276         TOMOYO_MAX_NETWORK_OPERATION
 277 };
 278
 279 /* Index numbers for access controls with two pathnames. */
 280 enum tomoyo_path2_acl_index {
 281         TOMOYO_TYPE_LINK,
 282         TOMOYO_TYPE_RENAME,
 283         TOMOYO_TYPE_PIVOT_ROOT,
 284         TOMOYO_MAX_PATH2_OPERATION
 285 };
 286
 287 /* Index numbers for access controls with one pathname and one number. */
 288 enum tomoyo_path_number_acl_index {
 289         TOMOYO_TYPE_CREATE,
 290         TOMOYO_TYPE_MKDIR,
 291         TOMOYO_TYPE_MKFIFO,
 292         TOMOYO_TYPE_MKSOCK,
 293         TOMOYO_TYPE_IOCTL,
 294         TOMOYO_TYPE_CHMOD,
 295         TOMOYO_TYPE_CHOWN,
 296         TOMOYO_TYPE_CHGRP,
 297         TOMOYO_MAX_PATH_NUMBER_OPERATION
 298 };
 299
 300 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 301 enum tomoyo_securityfs_interface_index {
 302         TOMOYO_DOMAINPOLICY,
 303         TOMOYO_EXCEPTIONPOLICY,
 304         TOMOYO_PROCESS_STATUS,
 305         TOMOYO_STAT,
 306         TOMOYO_AUDIT,
 307         TOMOYO_VERSION,
 308         TOMOYO_PROFILE,
 309         TOMOYO_QUERY,
 310         TOMOYO_MANAGER
 311 };
 312
 313 /* Index numbers for special mount operations. */
 314 enum tomoyo_special_mount {
 315         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 316         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 317         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 318         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 319         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 320         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 321         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 322         TOMOYO_MAX_SPECIAL_MOUNT
 323 };
 324
 325 /* Index numbers for functionality. */
 326 enum tomoyo_mac_index {
 327         TOMOYO_MAC_FILE_EXECUTE,
 328         TOMOYO_MAC_FILE_OPEN,
 329         TOMOYO_MAC_FILE_CREATE,
 330         TOMOYO_MAC_FILE_UNLINK,
 331         TOMOYO_MAC_FILE_GETATTR,
 332         TOMOYO_MAC_FILE_MKDIR,
 333         TOMOYO_MAC_FILE_RMDIR,
 334         TOMOYO_MAC_FILE_MKFIFO,
 335         TOMOYO_MAC_FILE_MKSOCK,
 336         TOMOYO_MAC_FILE_TRUNCATE,
 337         TOMOYO_MAC_FILE_SYMLINK,
 338         TOMOYO_MAC_FILE_MKBLOCK,
 339         TOMOYO_MAC_FILE_MKCHAR,
 340         TOMOYO_MAC_FILE_LINK,
 341         TOMOYO_MAC_FILE_RENAME,
 342         TOMOYO_MAC_FILE_CHMOD,
 343         TOMOYO_MAC_FILE_CHOWN,
 344         TOMOYO_MAC_FILE_CHGRP,
 345         TOMOYO_MAC_FILE_IOCTL,
 346         TOMOYO_MAC_FILE_CHROOT,
 347         TOMOYO_MAC_FILE_MOUNT,
 348         TOMOYO_MAC_FILE_UMOUNT,
 349         TOMOYO_MAC_FILE_PIVOT_ROOT,
 350         TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
 351         TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
 352         TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
 353         TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
 354         TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
 355         TOMOYO_MAC_NETWORK_INET_RAW_BIND,
 356         TOMOYO_MAC_NETWORK_INET_RAW_SEND,
 357         TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
 358         TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
 359         TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
 360         TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
 361         TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
 362         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
 363         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
 364         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 365         TOMOYO_MAC_ENVIRON,
 366         TOMOYO_MAX_MAC_INDEX
 367 };
 368
 369 /* Index numbers for category of functionality. */
 370 enum tomoyo_mac_category_index {
 371         TOMOYO_MAC_CATEGORY_FILE,
 372         TOMOYO_MAC_CATEGORY_NETWORK,
 373         TOMOYO_MAC_CATEGORY_MISC,
 374         TOMOYO_MAX_MAC_CATEGORY_INDEX
 375 };
 376
 377 /*
 378  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 379  * occurred in enforcing mode and the userspace daemon decided to retry.
 380  *
 381  * We must choose a positive value in order to distinguish "granted" (which is
 382  * 0) and "rejected" (which is a negative value) and "retry".
 383  */
 384 #define TOMOYO_RETRY_REQUEST 1
 385
 386 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 387 enum tomoyo_policy_stat_type {
 388         /* Do not change this order. */
 389         TOMOYO_STAT_POLICY_UPDATES,
 390         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 391         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 392         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 393         TOMOYO_MAX_POLICY_STAT
 394 };
 395
 396 /* Index numbers for profile's PREFERENCE values. */
 397 enum tomoyo_pref_index {
 398         TOMOYO_PREF_MAX_AUDIT_LOG,
 399         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 400         TOMOYO_MAX_PREF
 401 };
 402
 403 /********** Structure definitions. **********/
 404
 405 /* Common header for holding ACL entries. */
 406 struct tomoyo_acl_head {
 407         struct list_head list;
 408         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 409 } __packed;
 410
 411 /* Common header for shared entries. */
 412 struct tomoyo_shared_acl_head {
 413         struct list_head list;
 414         atomic_t users;
 415 } __packed;
 416
 417 struct tomoyo_policy_namespace;
 418
 419 /* Structure for request info. */
 420 struct tomoyo_request_info {
 421         /*
 422          * For holding parameters specific to operations which deal files.
 423          * NULL if not dealing files.
 424          */
 425         struct tomoyo_obj_info *obj;
 426         /*
 427          * For holding parameters specific to execve() request.
 428          * NULL if not dealing execve().
 429          */
 430         struct tomoyo_execve *ee;
 431         struct tomoyo_domain_info *domain;
 432         /* For holding parameters. */
 433         union {
 434                 struct {
 435                         const struct tomoyo_path_info *filename;
 436                         /* For using wildcards at tomoyo_find_next_domain(). */
 437                         const struct tomoyo_path_info *matched_path;
 438                         /* One of values in "enum tomoyo_path_acl_index". */
 439                         u8 operation;
 440                 } path;
 441                 struct {
 442                         const struct tomoyo_path_info *filename1;
 443                         const struct tomoyo_path_info *filename2;
 444                         /* One of values in "enum tomoyo_path2_acl_index". */
 445                         u8 operation;
 446                 } path2;
 447                 struct {
 448                         const struct tomoyo_path_info *filename;
 449                         unsigned int mode;
 450                         unsigned int major;
 451                         unsigned int minor;
 452                         /* One of values in "enum tomoyo_mkdev_acl_index". */
 453                         u8 operation;
 454                 } mkdev;
 455                 struct {
 456                         const struct tomoyo_path_info *filename;
 457                         unsigned long number;
 458                         /*
 459                          * One of values in
 460                          * "enum tomoyo_path_number_acl_index".
 461                          */
 462                         u8 operation;
 463                 } path_number;
 464                 struct {
 465                         const struct tomoyo_path_info *name;
 466                 } environ;
 467                 struct {
 468                         const __be32 *address;
 469                         u16 port;
 470                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 471                         u8 protocol;
 472                         /* One of values in "enum tomoyo_network_acl_index". */
 473                         u8 operation;
 474                         bool is_ipv6;
 475                 } inet_network;
 476                 struct {
 477                         const struct tomoyo_path_info *address;
 478                         /* One of values smaller than TOMOYO_SOCK_MAX. */
 479                         u8 protocol;
 480                         /* One of values in "enum tomoyo_network_acl_index". */
 481                         u8 operation;
 482                 } unix_network;
 483                 struct {
 484                         const struct tomoyo_path_info *type;
 485                         const struct tomoyo_path_info *dir;
 486                         const struct tomoyo_path_info *dev;
 487                         unsigned long flags;
 488                         int need_dev;
 489                 } mount;
 490                 struct {
 491                         const struct tomoyo_path_info *domainname;
 492                 } task;
 493         } param;
 494         struct tomoyo_acl_info *matched_acl;
 495         u8 param_type;
 496         bool granted;
 497         u8 retry;
 498         u8 profile;
 499         u8 mode; /* One of tomoyo_mode_index . */
 500         u8 type;
 501 };
 502
 503 /* Structure for holding a token. */
 504 struct tomoyo_path_info {
 505         const char *name;
 506         u32 hash;          /* = full_name_hash(name, strlen(name)) */
 507         u16 const_len;     /* = tomoyo_const_part_length(name)     */
 508         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 509         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 510 };
 511
 512 /* Structure for holding string data. */
 513 struct tomoyo_name {
 514         struct tomoyo_shared_acl_head head;
 515         struct tomoyo_path_info entry;
 516 };
 517
 518 /* Structure for holding a word. */
 519 struct tomoyo_name_union {
 520         /* Either @filename or @group is NULL. */
 521         const struct tomoyo_path_info *filename;
 522         struct tomoyo_group *group;
 523 };
 524
 525 /* Structure for holding a number. */
 526 struct tomoyo_number_union {
 527         unsigned long values[2];
 528         struct tomoyo_group *group; /* Maybe NULL. */
 529         /* One of values in "enum tomoyo_value_type". */
 530         u8 value_type[2];
 531 };
 532
 533 /* Structure for holding an IP address. */
 534 struct tomoyo_ipaddr_union {
 535         struct in6_addr ip[2]; /* Big endian. */
 536         struct tomoyo_group *group; /* Pointer to address group. */
 537         bool is_ipv6; /* Valid only if @group == NULL. */
 538 };
 539
 540 /* Structure for "path_group"/"number_group"/"address_group" directive. */
 541 struct tomoyo_group {
 542         struct tomoyo_shared_acl_head head;
 543         const struct tomoyo_path_info *group_name;
 544         struct list_head member_list;
 545 };
 546
 547 /* Structure for "path_group" directive. */
 548 struct tomoyo_path_group {
 549         struct tomoyo_acl_head head;
 550         const struct tomoyo_path_info *member_name;
 551 };
 552
 553 /* Structure for "number_group" directive. */
 554 struct tomoyo_number_group {
 555         struct tomoyo_acl_head head;
 556         struct tomoyo_number_union number;
 557 };
 558
 559 /* Structure for "address_group" directive. */
 560 struct tomoyo_address_group {
 561         struct tomoyo_acl_head head;
 562         /* Structure for holding an IP address. */
 563         struct tomoyo_ipaddr_union address;
 564 };
 565
 566 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
 567 struct tomoyo_mini_stat {
 568         kuid_t uid;
 569         kgid_t gid;
 570         ino_t ino;
 571         umode_t mode;
 572         dev_t dev;
 573         dev_t rdev;
 574 };
 575
 576 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
 577 struct tomoyo_page_dump {
 578         struct page *page;    /* Previously dumped page. */
 579         char *data;           /* Contents of "page". Size is PAGE_SIZE. */
 580 };
 581
 582 /* Structure for attribute checks in addition to pathname checks. */
 583 struct tomoyo_obj_info {
 584         /*
 585          * True if tomoyo_get_attributes() was already called, false otherwise.
 586          */
 587         bool validate_done;
 588         /* True if @stat[] is valid. */
 589         bool stat_valid[TOMOYO_MAX_PATH_STAT];
 590         /* First pathname. Initialized with { NULL, NULL } if no path. */
 591         struct path path1;
 592         /* Second pathname. Initialized with { NULL, NULL } if no path. */
 593         struct path path2;
 594         /*
 595          * Information on @path1, @path1's parent directory, @path2, @path2's
 596          * parent directory.
 597          */
 598         struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
 599         /*
 600          * Content of symbolic link to be created. NULL for operations other
 601          * than symlink().
 602          */
 603         struct tomoyo_path_info *symlink_target;
 604 };
 605
 606 /* Structure for argv[]. */
 607 struct tomoyo_argv {
 608         unsigned long index;
 609         const struct tomoyo_path_info *value;
 610         bool is_not;
 611 };
 612
 613 /* Structure for envp[]. */
 614 struct tomoyo_envp {
 615         const struct tomoyo_path_info *name;
 616         const struct tomoyo_path_info *value;
 617         bool is_not;
 618 };
 619
 620 /* Structure for execve() operation. */
 621 struct tomoyo_execve {
 622         struct tomoyo_request_info r;
 623         struct tomoyo_obj_info obj;
 624         struct linux_binprm *bprm;
 625         const struct tomoyo_path_info *transition;
 626         /* For dumping argv[] and envp[]. */
 627         struct tomoyo_page_dump dump;
 628         /* For temporary use. */
 629         char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
 630 };
 631
 632 /* Structure for entries which follows "struct tomoyo_condition". */
 633 struct tomoyo_condition_element {
 634         /*
 635          * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
 636          * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
 637          * of the array of this struct.
 638          */
 639         u8 left;
 640         /*
 641          * Right hand operand. A "struct tomoyo_number_union" for
 642          * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
 643          * TOMOYO_NAME_UNION is attached to the tail of the array of this
 644          * struct.
 645          */
 646         u8 right;
 647         /* Equation operator. True if equals or overlaps, false otherwise. */
 648         bool equals;
 649 };
 650
 651 /* Structure for optional arguments. */
 652 struct tomoyo_condition {
 653         struct tomoyo_shared_acl_head head;
 654         u32 size; /* Memory size allocated for this entry. */
 655         u16 condc; /* Number of conditions in this struct. */
 656         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 657         u16 names_count; /* Number of "struct tomoyo_name_union names". */
 658         u16 argc; /* Number of "struct tomoyo_argv". */
 659         u16 envc; /* Number of "struct tomoyo_envp". */
 660         u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
 661         const struct tomoyo_path_info *transit; /* Maybe NULL. */
 662         /*
 663          * struct tomoyo_condition_element condition[condc];
 664          * struct tomoyo_number_union values[numbers_count];
 665          * struct tomoyo_name_union names[names_count];
 666          * struct tomoyo_argv argv[argc];
 667          * struct tomoyo_envp envp[envc];
 668          */
 669 };
 670
 671 /* Common header for individual entries. */
 672 struct tomoyo_acl_info {
 673         struct list_head list;
 674         struct tomoyo_condition *cond; /* Maybe NULL. */
 675         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 676         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 677 } __packed;
 678
 679 /* Structure for domain information. */
 680 struct tomoyo_domain_info {
 681         struct list_head list;
 682         struct list_head acl_info_list;
 683         /* Name of this domain. Never NULL.          */
 684         const struct tomoyo_path_info *domainname;
 685         /* Namespace for this domain. Never NULL. */
 686         struct tomoyo_policy_namespace *ns;
 687         /* Group numbers to use.   */
 688         unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
 689         u8 profile;        /* Profile number to use. */
 690         bool is_deleted;   /* Delete flag.           */
 691         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 692         atomic_t users; /* Number of referring tasks. */
 693 };
 694
 695 /*
 696  * Structure for "task manual_domain_transition" directive.
 697  */
 698 struct tomoyo_task_acl {
 699         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
 700         /* Pointer to domainname. */
 701         const struct tomoyo_path_info *domainname;
 702 };
 703
 704 /*
 705  * Structure for "file execute", "file read", "file write", "file append",
 706  * "file unlink", "file getattr", "file rmdir", "file truncate",
 707  * "file symlink", "file chroot" and "file unmount" directive.
 708  */
 709 struct tomoyo_path_acl {
 710         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 711         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 712         struct tomoyo_name_union name;
 713 };
 714
 715 /*
 716  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 717  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 718  */
 719 struct tomoyo_path_number_acl {
 720         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 721         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 722         u8 perm;
 723         struct tomoyo_name_union name;
 724         struct tomoyo_number_union number;
 725 };
 726
 727 /* Structure for "file mkblock" and "file mkchar" directive. */
 728 struct tomoyo_mkdev_acl {
 729         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 730         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 731         struct tomoyo_name_union name;
 732         struct tomoyo_number_union mode;
 733         struct tomoyo_number_union major;
 734         struct tomoyo_number_union minor;
 735 };
 736
 737 /*
 738  * Structure for "file rename", "file link" and "file pivot_root" directive.
 739  */
 740 struct tomoyo_path2_acl {
 741         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 742         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 743         struct tomoyo_name_union name1;
 744         struct tomoyo_name_union name2;
 745 };
 746
 747 /* Structure for "file mount" directive. */
 748 struct tomoyo_mount_acl {
 749         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 750         struct tomoyo_name_union dev_name;
 751         struct tomoyo_name_union dir_name;
 752         struct tomoyo_name_union fs_type;
 753         struct tomoyo_number_union flags;
 754 };
 755
 756 /* Structure for "misc env" directive in domain policy. */
 757 struct tomoyo_env_acl {
 758         struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
 759         const struct tomoyo_path_info *env; /* environment variable */
 760 };
 761
 762 /* Structure for "network inet" directive. */
 763 struct tomoyo_inet_acl {
 764         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
 765         u8 protocol;
 766         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 767         struct tomoyo_ipaddr_union address;
 768         struct tomoyo_number_union port;
 769 };
 770
 771 /* Structure for "network unix" directive. */
 772 struct tomoyo_unix_acl {
 773         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
 774         u8 protocol;
 775         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 776         struct tomoyo_name_union name;
 777 };
 778
 779 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 780 struct tomoyo_acl_param {
 781         char *data;
 782         struct list_head *list;
 783         struct tomoyo_policy_namespace *ns;
 784         bool is_delete;
 785 };
 786
 787 #define TOMOYO_MAX_IO_READ_QUEUE 64
 788
 789 /*
 790  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 791  * interfaces.
 792  */
 793 struct tomoyo_io_buffer {
 794         void (*read)(struct tomoyo_io_buffer *head);
 795         int (*write)(struct tomoyo_io_buffer *head);
 796         __poll_t (*poll)(struct file *file, poll_table *wait);
 797         /* Exclusive lock for this structure.   */
 798         struct mutex io_sem;
 799         char __user *read_user_buf;
 800         size_t read_user_buf_avail;
 801         struct {
 802                 struct list_head *ns;
 803                 struct list_head *domain;
 804                 struct list_head *group;
 805                 struct list_head *acl;
 806                 size_t avail;
 807                 unsigned int step;
 808                 unsigned int query_index;
 809                 u16 index;
 810                 u16 cond_index;
 811                 u8 acl_group_index;
 812                 u8 cond_step;
 813                 u8 bit;
 814                 u8 w_pos;
 815                 bool eof;
 816                 bool print_this_domain_only;
 817                 bool print_transition_related_only;
 818                 bool print_cond_part;
 819                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 820         } r;
 821         struct {
 822                 struct tomoyo_policy_namespace *ns;
 823                 /* The position currently writing to.   */
 824                 struct tomoyo_domain_info *domain;
 825                 /* Bytes available for writing.         */
 826                 size_t avail;
 827                 bool is_delete;
 828         } w;
 829         /* Buffer for reading.                  */
 830         char *read_buf;
 831         /* Size of read buffer.                 */
 832         size_t readbuf_size;
 833         /* Buffer for writing.                  */
 834         char *write_buf;
 835         /* Size of write buffer.                */
 836         size_t writebuf_size;
 837         /* Type of this interface.              */
 838         enum tomoyo_securityfs_interface_index type;
 839         /* Users counter protected by tomoyo_io_buffer_list_lock. */
 840         u8 users;
 841         /* List for telling GC not to kfree() elements. */
 842         struct list_head list;
 843 };
 844
 845 /*
 846  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 847  * "no_keep_domain" keyword.
 848  */
 849 struct tomoyo_transition_control {
 850         struct tomoyo_acl_head head;
 851         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 852         /* True if the domainname is tomoyo_get_last_name(). */
 853         bool is_last_name;
 854         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 855         const struct tomoyo_path_info *program;    /* Maybe NULL */
 856 };
 857
 858 /* Structure for "aggregator" keyword. */
 859 struct tomoyo_aggregator {
 860         struct tomoyo_acl_head head;
 861         const struct tomoyo_path_info *original_name;
 862         const struct tomoyo_path_info *aggregated_name;
 863 };
 864
 865 /* Structure for policy manager. */
 866 struct tomoyo_manager {
 867         struct tomoyo_acl_head head;
 868         /* A path to program or a domainname. */
 869         const struct tomoyo_path_info *manager;
 870 };
 871
 872 struct tomoyo_preference {
 873         unsigned int learning_max_entry;
 874         bool enforcing_verbose;
 875         bool learning_verbose;
 876         bool permissive_verbose;
 877 };
 878
 879 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 880 struct tomoyo_profile {
 881         const struct tomoyo_path_info *comment;
 882         struct tomoyo_preference *learning;
 883         struct tomoyo_preference *permissive;
 884         struct tomoyo_preference *enforcing;
 885         struct tomoyo_preference preference;
 886         u8 default_config;
 887         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 888         unsigned int pref[TOMOYO_MAX_PREF];
 889 };
 890
 891 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 892 struct tomoyo_time {
 893         u16 year;
 894         u8 month;
 895         u8 day;
 896         u8 hour;
 897         u8 min;
 898         u8 sec;
 899 };
 900
 901 /* Structure for policy namespace. */
 902 struct tomoyo_policy_namespace {
 903         /* Profile table. Memory is allocated as needed. */
 904         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 905         /* List of "struct tomoyo_group". */
 906         struct list_head group_list[TOMOYO_MAX_GROUP];
 907         /* List of policy. */
 908         struct list_head policy_list[TOMOYO_MAX_POLICY];
 909         /* The global ACL referred by "use_group" keyword. */
 910         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 911         /* List for connecting to tomoyo_namespace_list list. */
 912         struct list_head namespace_list;
 913         /* Profile version. Currently only 20150505 is defined. */
 914         unsigned int profile_version;
 915         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 916         const char *name;
 917 };
 918
 919 /* Structure for "struct task_struct"->security. */
 920 struct tomoyo_task {
 921         struct tomoyo_domain_info *domain_info;
 922         struct tomoyo_domain_info *old_domain_info;
 923 };
 924
 925 /********** Function prototypes. **********/
 926
 927 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
 928                                   const struct tomoyo_group *group);
 929 bool tomoyo_compare_number_union(const unsigned long value,
 930                                  const struct tomoyo_number_union *ptr);
 931 bool tomoyo_condition(struct tomoyo_request_info *r,
 932                       const struct tomoyo_condition *cond);
 933 bool tomoyo_correct_domain(const unsigned char *domainname);
 934 bool tomoyo_correct_path(const char *filename);
 935 bool tomoyo_correct_word(const char *string);
 936 bool tomoyo_domain_def(const unsigned char *buffer);
 937 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 938 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
 939                       struct tomoyo_page_dump *dump);
 940 bool tomoyo_memory_ok(void *ptr);
 941 bool tomoyo_number_matches_group(const unsigned long min,
 942                                  const unsigned long max,
 943                                  const struct tomoyo_group *group);
 944 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
 945                                struct tomoyo_ipaddr_union *ptr);
 946 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 947                              struct tomoyo_name_union *ptr);
 948 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 949                                struct tomoyo_number_union *ptr);
 950 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 951                                  const struct tomoyo_path_info *pattern);
 952 bool tomoyo_permstr(const char *string, const char *keyword);
 953 bool tomoyo_str_starts(char **src, const char *find);
 954 char *tomoyo_encode(const char *str);
 955 char *tomoyo_encode2(const char *str, int str_len);
 956 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 957                       va_list args);
 958 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 959 char *tomoyo_realpath_from_path(const struct path *path);
 960 char *tomoyo_realpath_nofollow(const char *pathname);
 961 const char *tomoyo_get_exe(void);
 962 const char *tomoyo_yesno(const unsigned int value);
 963 const struct tomoyo_path_info *tomoyo_compare_name_union
 964 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 965 const struct tomoyo_path_info *tomoyo_get_domainname
 966 (struct tomoyo_acl_param *param);
 967 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 968 const struct tomoyo_path_info *tomoyo_path_matches_group
 969 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 970 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 971                                  const struct path *path, const int flag);
 972 void tomoyo_close_control(struct tomoyo_io_buffer *head);
 973 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 974 int tomoyo_execute_permission(struct tomoyo_request_info *r,
 975                               const struct tomoyo_path_info *filename);
 976 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 977 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 978                     const u8 index);
 979 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 980                              struct tomoyo_domain_info *domain,
 981                              const u8 index);
 982 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
 983                       const unsigned int mode, unsigned int dev);
 984 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
 985                             const char *type, unsigned long flags,
 986                             void *data_page);
 987 int tomoyo_open_control(const u8 type, struct file *file);
 988 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
 989                       const struct path *path2);
 990 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
 991                             unsigned long number);
 992 int tomoyo_path_perm(const u8 operation, const struct path *path,
 993                      const char *target);
 994 __poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
 995 __poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
 996 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
 997                                   int addr_len);
 998 int tomoyo_socket_connect_permission(struct socket *sock,
 999                                      struct sockaddr *addr, int addr_len);
1000 int tomoyo_socket_listen_permission(struct socket *sock);
1001 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
1002                                      int size);
1003 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1004         __printf(2, 3);
1005 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
1006                          struct tomoyo_acl_param *param,
1007                          bool (*check_duplicate)
1008                          (const struct tomoyo_acl_info *,
1009                           const struct tomoyo_acl_info *),
1010                          bool (*merge_duplicate)
1011                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1012                           const bool));
1013 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1014                          struct tomoyo_acl_param *param,
1015                          bool (*check_duplicate)
1016                          (const struct tomoyo_acl_head *,
1017                           const struct tomoyo_acl_head *));
1018 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1019 int tomoyo_write_file(struct tomoyo_acl_param *param);
1020 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1021 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1022 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1023 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1024                                     const u8 type);
1025 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1026 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1027                             const int buffer_len);
1028 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1029                              const char __user *buffer, const int buffer_len);
1030 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1031 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1032                                                 const bool transit);
1033 struct tomoyo_domain_info *tomoyo_domain(void);
1034 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1035 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1036                                       const u8 idx);
1037 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1038 (const char *domainname);
1039 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1040                                       const u8 profile);
1041 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1042                                 const u8 index);
1043 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1044 void *tomoyo_commit_ok(void *data, const unsigned int size);
1045 void __init tomoyo_load_builtin_policy(void);
1046 void __init tomoyo_mm_init(void);
1047 void tomoyo_check_acl(struct tomoyo_request_info *r,
1048                       bool (*check_entry)(struct tomoyo_request_info *,
1049                                           const struct tomoyo_acl_info *));
1050 void tomoyo_check_profile(void);
1051 void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1052 void tomoyo_del_condition(struct list_head *element);
1053 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1054 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1055 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1056 void tomoyo_load_policy(const char *filename);
1057 void tomoyo_normalize_line(unsigned char *buffer);
1058 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1059 void tomoyo_print_ip(char *buf, const unsigned int size,
1060                      const struct tomoyo_ipaddr_union *ptr);
1061 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1062                         const unsigned long value, const u8 type);
1063 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1064 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1065 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1066 void tomoyo_update_stat(const u8 index);
1067 void tomoyo_warn_oom(const char *function);
1068 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1069         __printf(2, 3);
1070 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1071                        va_list args);
1072
1073 /********** External variable definitions. **********/
1074
1075 extern bool tomoyo_policy_loaded;
1076 extern int tomoyo_enabled;
1077 extern const char * const tomoyo_condition_keyword
1078 [TOMOYO_MAX_CONDITION_KEYWORD];
1079 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1080 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1081                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1082 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1083 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1084 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1085 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1086 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1087 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1088 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1089 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1090 extern struct list_head tomoyo_condition_list;
1091 extern struct list_head tomoyo_domain_list;
1092 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1093 extern struct list_head tomoyo_namespace_list;
1094 extern struct mutex tomoyo_policy_lock;
1095 extern struct srcu_struct tomoyo_ss;
1096 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1097 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1098 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1099 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1100 extern struct lsm_blob_sizes tomoyo_blob_sizes;
1101
1102 /********** Inlined functions. **********/
1103
1104 /**
1105  * tomoyo_read_lock - Take lock for protecting policy.
1106  *
1107  * Returns index number for tomoyo_read_unlock().
1108  */
1109 static inline int tomoyo_read_lock(void)
1110 {
1111         return srcu_read_lock(&tomoyo_ss);
1112 }
1113
1114 /**
1115  * tomoyo_read_unlock - Release lock for protecting policy.
1116  *
1117  * @idx: Index number returned by tomoyo_read_lock().
1118  *
1119  * Returns nothing.
1120  */
1121 static inline void tomoyo_read_unlock(int idx)
1122 {
1123         srcu_read_unlock(&tomoyo_ss, idx);
1124 }
1125
1126 /**
1127  * tomoyo_sys_getppid - Copy of getppid().
1128  *
1129  * Returns parent process's PID.
1130  *
1131  * Alpha does not have getppid() defined. To be able to build this module on
1132  * Alpha, I have to copy getppid() from kernel/timer.c.
1133  */
1134 static inline pid_t tomoyo_sys_getppid(void)
1135 {
1136         pid_t pid;
1137
1138         rcu_read_lock();
1139         pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1140         rcu_read_unlock();
1141         return pid;
1142 }
1143
1144 /**
1145  * tomoyo_sys_getpid - Copy of getpid().
1146  *
1147  * Returns current thread's PID.
1148  *
1149  * Alpha does not have getpid() defined. To be able to build this module on
1150  * Alpha, I have to copy getpid() from kernel/timer.c.
1151  */
1152 static inline pid_t tomoyo_sys_getpid(void)
1153 {
1154         return task_tgid_vnr(current);
1155 }
1156
1157 /**
1158  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1159  *
1160  * @a: Pointer to "struct tomoyo_path_info".
1161  * @b: Pointer to "struct tomoyo_path_info".
1162  *
1163  * Returns true if @a == @b, false otherwise.
1164  */
1165 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1166                                   const struct tomoyo_path_info *b)
1167 {
1168         return a->hash != b->hash || strcmp(a->name, b->name);
1169 }
1170
1171 /**
1172  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1173  *
1174  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1175  *
1176  * Returns nothing.
1177  */
1178 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1179 {
1180         if (name) {
1181                 struct tomoyo_name *ptr =
1182                         container_of(name, typeof(*ptr), entry);
1183                 atomic_dec(&ptr->head.users);
1184         }
1185 }
1186
1187 /**
1188  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1189  *
1190  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1191  *
1192  * Returns nothing.
1193  */
1194 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1195 {
1196         if (cond)
1197                 atomic_dec(&cond->head.users);
1198 }
1199
1200 /**
1201  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1202  *
1203  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1204  *
1205  * Returns nothing.
1206  */
1207 static inline void tomoyo_put_group(struct tomoyo_group *group)
1208 {
1209         if (group)
1210                 atomic_dec(&group->head.users);
1211 }
1212
1213 /**
1214  * tomoyo_task - Get "struct tomoyo_task" for specified thread.
1215  *
1216  * @task - Pointer to "struct task_struct".
1217  *
1218  * Returns pointer to "struct tomoyo_task" for specified thread.
1219  */
1220 static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
1221 {
1222         return task->security + tomoyo_blob_sizes.lbs_task;
1223 }
1224
1225 /**
1226  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1227  *
1228  * @a: Pointer to "struct tomoyo_name_union".
1229  * @b: Pointer to "struct tomoyo_name_union".
1230  *
1231  * Returns true if @a == @b, false otherwise.
1232  */
1233 static inline bool tomoyo_same_name_union
1234 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1235 {
1236         return a->filename == b->filename && a->group == b->group;
1237 }
1238
1239 /**
1240  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1241  *
1242  * @a: Pointer to "struct tomoyo_number_union".
1243  * @b: Pointer to "struct tomoyo_number_union".
1244  *
1245  * Returns true if @a == @b, false otherwise.
1246  */
1247 static inline bool tomoyo_same_number_union
1248 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1249 {
1250         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1251                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1252                 a->value_type[1] == b->value_type[1];
1253 }
1254
1255 /**
1256  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1257  *
1258  * @a: Pointer to "struct tomoyo_ipaddr_union".
1259  * @b: Pointer to "struct tomoyo_ipaddr_union".
1260  *
1261  * Returns true if @a == @b, false otherwise.
1262  */
1263 static inline bool tomoyo_same_ipaddr_union
1264 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1265 {
1266         return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1267                 a->is_ipv6 == b->is_ipv6;
1268 }
1269
1270 /**
1271  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1272  *
1273  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1274  */
1275 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1276 {
1277         return tomoyo_domain()->ns;
1278 }
1279
1280 #if defined(CONFIG_SLOB)
1281
1282 /**
1283  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1284  *
1285  * @size: Size to be rounded up.
1286  *
1287  * Returns @size.
1288  *
1289  * Since SLOB does not round up, this function simply returns @size.
1290  */
1291 static inline int tomoyo_round2(size_t size)
1292 {
1293         return size;
1294 }
1295
1296 #else
1297
1298 /**
1299  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1300  *
1301  * @size: Size to be rounded up.
1302  *
1303  * Returns rounded size.
1304  *
1305  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1306  * (e.g.) 128 bytes.
1307  */
1308 static inline int tomoyo_round2(size_t size)
1309 {
1310 #if PAGE_SIZE == 4096
1311         size_t bsize = 32;
1312 #else
1313         size_t bsize = 64;
1314 #endif
1315         if (!size)
1316                 return 0;
1317         while (size > bsize)
1318                 bsize <<= 1;
1319         return bsize;
1320 }
1321
1322 #endif
1323
1324 /**
1325  * list_for_each_cookie - iterate over a list with cookie.
1326  * @pos:        the &struct list_head to use as a loop cursor.
1327  * @head:       the head for your list.
1328  */
1329 #define list_for_each_cookie(pos, head)                                 \
1330         if (!pos)                                                       \
1331                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1332         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1333
1334 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */