security/tomoyo/common.h

   1 /*
   2  * security/tomoyo/common.h
   3  *
   4  * Header file for TOMOYO.
   5  *
   6  * Copyright (C) 2005-2010  NTT DATA CORPORATION
   7  */
   8
   9 #ifndef _SECURITY_TOMOYO_COMMON_H
  10 #define _SECURITY_TOMOYO_COMMON_H
  11
  12 #include <linux/ctype.h>
  13 #include <linux/string.h>
  14 #include <linux/mm.h>
  15 #include <linux/file.h>
  16 #include <linux/kmod.h>
  17 #include <linux/fs.h>
  18 #include <linux/sched.h>
  19 #include <linux/namei.h>
  20 #include <linux/mount.h>
  21 #include <linux/list.h>
  22 #include <linux/cred.h>
  23 #include <linux/poll.h>
  24 #include <linux/binfmts.h>
  25 #include <linux/highmem.h>
  26
  27 /********** Constants definitions. **********/
  28
  29 /*
  30  * TOMOYO uses this hash only when appending a string into the string
  31  * table. Frequency of appending strings is very low. So we don't need
  32  * large (e.g. 64k) hash size. 256 will be sufficient.
  33  */
  34 #define TOMOYO_HASH_BITS  8
  35 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  36
  37 #define TOMOYO_EXEC_TMPSIZE     4096
  38
  39 /* Profile number is an integer between 0 and 255. */
  40 #define TOMOYO_MAX_PROFILES 256
  41
  42 /* Group number is an integer between 0 and 255. */
  43 #define TOMOYO_MAX_ACL_GROUPS 256
  44
  45 /* Index numbers for "struct tomoyo_condition". */
  46 enum tomoyo_conditions_index {
  47         TOMOYO_TASK_UID,             /* current_uid()   */
  48         TOMOYO_TASK_EUID,            /* current_euid()  */
  49         TOMOYO_TASK_SUID,            /* current_suid()  */
  50         TOMOYO_TASK_FSUID,           /* current_fsuid() */
  51         TOMOYO_TASK_GID,             /* current_gid()   */
  52         TOMOYO_TASK_EGID,            /* current_egid()  */
  53         TOMOYO_TASK_SGID,            /* current_sgid()  */
  54         TOMOYO_TASK_FSGID,           /* current_fsgid() */
  55         TOMOYO_TASK_PID,             /* sys_getpid()   */
  56         TOMOYO_TASK_PPID,            /* sys_getppid()  */
  57         TOMOYO_MAX_CONDITION_KEYWORD,
  58         TOMOYO_NUMBER_UNION,
  59 };
  60
  61 /* Index numbers for operation mode. */
  62 enum tomoyo_mode_index {
  63         TOMOYO_CONFIG_DISABLED,
  64         TOMOYO_CONFIG_LEARNING,
  65         TOMOYO_CONFIG_PERMISSIVE,
  66         TOMOYO_CONFIG_ENFORCING,
  67         TOMOYO_CONFIG_MAX_MODE,
  68         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
  69         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
  70         TOMOYO_CONFIG_USE_DEFAULT     = 255,
  71 };
  72
  73 /* Index numbers for entry type. */
  74 enum tomoyo_policy_id {
  75         TOMOYO_ID_GROUP,
  76         TOMOYO_ID_PATH_GROUP,
  77         TOMOYO_ID_NUMBER_GROUP,
  78         TOMOYO_ID_TRANSITION_CONTROL,
  79         TOMOYO_ID_AGGREGATOR,
  80         TOMOYO_ID_MANAGER,
  81         TOMOYO_ID_CONDITION,
  82         TOMOYO_ID_NAME,
  83         TOMOYO_ID_ACL,
  84         TOMOYO_ID_DOMAIN,
  85         TOMOYO_MAX_POLICY
  86 };
  87
  88 /* Index numbers for domain's attributes. */
  89 enum tomoyo_domain_info_flags_index {
  90         /* Quota warnning flag.   */
  91         TOMOYO_DIF_QUOTA_WARNED,
  92         /*
  93          * This domain was unable to create a new domain at
  94          * tomoyo_find_next_domain() because the name of the domain to be
  95          * created was too long or it could not allocate memory.
  96          * More than one process continued execve() without domain transition.
  97          */
  98         TOMOYO_DIF_TRANSITION_FAILED,
  99         TOMOYO_MAX_DOMAIN_INFO_FLAGS
 100 };
 101
 102 /* Index numbers for group entries. */
 103 enum tomoyo_group_id {
 104         TOMOYO_PATH_GROUP,
 105         TOMOYO_NUMBER_GROUP,
 106         TOMOYO_MAX_GROUP
 107 };
 108
 109 /* Index numbers for type of numeric values. */
 110 enum tomoyo_value_type {
 111         TOMOYO_VALUE_TYPE_INVALID,
 112         TOMOYO_VALUE_TYPE_DECIMAL,
 113         TOMOYO_VALUE_TYPE_OCTAL,
 114         TOMOYO_VALUE_TYPE_HEXADECIMAL,
 115 };
 116
 117 /* Index numbers for domain transition control keywords. */
 118 enum tomoyo_transition_type {
 119         /* Do not change this order, */
 120         TOMOYO_TRANSITION_CONTROL_NO_RESET,
 121         TOMOYO_TRANSITION_CONTROL_RESET,
 122         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 123         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 124         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 125         TOMOYO_TRANSITION_CONTROL_KEEP,
 126         TOMOYO_MAX_TRANSITION_TYPE
 127 };
 128
 129 /* Index numbers for Access Controls. */
 130 enum tomoyo_acl_entry_type_index {
 131         TOMOYO_TYPE_PATH_ACL,
 132         TOMOYO_TYPE_PATH2_ACL,
 133         TOMOYO_TYPE_PATH_NUMBER_ACL,
 134         TOMOYO_TYPE_MKDEV_ACL,
 135         TOMOYO_TYPE_MOUNT_ACL,
 136 };
 137
 138 /* Index numbers for access controls with one pathname. */
 139 enum tomoyo_path_acl_index {
 140         TOMOYO_TYPE_EXECUTE,
 141         TOMOYO_TYPE_READ,
 142         TOMOYO_TYPE_WRITE,
 143         TOMOYO_TYPE_APPEND,
 144         TOMOYO_TYPE_UNLINK,
 145         TOMOYO_TYPE_GETATTR,
 146         TOMOYO_TYPE_RMDIR,
 147         TOMOYO_TYPE_TRUNCATE,
 148         TOMOYO_TYPE_SYMLINK,
 149         TOMOYO_TYPE_CHROOT,
 150         TOMOYO_TYPE_UMOUNT,
 151         TOMOYO_MAX_PATH_OPERATION
 152 };
 153
 154 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 155 enum tomoyo_memory_stat_type {
 156         TOMOYO_MEMORY_POLICY,
 157         TOMOYO_MEMORY_AUDIT,
 158         TOMOYO_MEMORY_QUERY,
 159         TOMOYO_MAX_MEMORY_STAT
 160 };
 161
 162 enum tomoyo_mkdev_acl_index {
 163         TOMOYO_TYPE_MKBLOCK,
 164         TOMOYO_TYPE_MKCHAR,
 165         TOMOYO_MAX_MKDEV_OPERATION
 166 };
 167
 168 /* Index numbers for access controls with two pathnames. */
 169 enum tomoyo_path2_acl_index {
 170         TOMOYO_TYPE_LINK,
 171         TOMOYO_TYPE_RENAME,
 172         TOMOYO_TYPE_PIVOT_ROOT,
 173         TOMOYO_MAX_PATH2_OPERATION
 174 };
 175
 176 /* Index numbers for access controls with one pathname and one number. */
 177 enum tomoyo_path_number_acl_index {
 178         TOMOYO_TYPE_CREATE,
 179         TOMOYO_TYPE_MKDIR,
 180         TOMOYO_TYPE_MKFIFO,
 181         TOMOYO_TYPE_MKSOCK,
 182         TOMOYO_TYPE_IOCTL,
 183         TOMOYO_TYPE_CHMOD,
 184         TOMOYO_TYPE_CHOWN,
 185         TOMOYO_TYPE_CHGRP,
 186         TOMOYO_MAX_PATH_NUMBER_OPERATION
 187 };
 188
 189 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 190 enum tomoyo_securityfs_interface_index {
 191         TOMOYO_DOMAINPOLICY,
 192         TOMOYO_EXCEPTIONPOLICY,
 193         TOMOYO_PROCESS_STATUS,
 194         TOMOYO_STAT,
 195         TOMOYO_SELFDOMAIN,
 196         TOMOYO_AUDIT,
 197         TOMOYO_VERSION,
 198         TOMOYO_PROFILE,
 199         TOMOYO_QUERY,
 200         TOMOYO_MANAGER
 201 };
 202
 203 /* Index numbers for special mount operations. */
 204 enum tomoyo_special_mount {
 205         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 206         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 207         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 208         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 209         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 210         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 211         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 212         TOMOYO_MAX_SPECIAL_MOUNT
 213 };
 214
 215 /* Index numbers for functionality. */
 216 enum tomoyo_mac_index {
 217         TOMOYO_MAC_FILE_EXECUTE,
 218         TOMOYO_MAC_FILE_OPEN,
 219         TOMOYO_MAC_FILE_CREATE,
 220         TOMOYO_MAC_FILE_UNLINK,
 221         TOMOYO_MAC_FILE_GETATTR,
 222         TOMOYO_MAC_FILE_MKDIR,
 223         TOMOYO_MAC_FILE_RMDIR,
 224         TOMOYO_MAC_FILE_MKFIFO,
 225         TOMOYO_MAC_FILE_MKSOCK,
 226         TOMOYO_MAC_FILE_TRUNCATE,
 227         TOMOYO_MAC_FILE_SYMLINK,
 228         TOMOYO_MAC_FILE_MKBLOCK,
 229         TOMOYO_MAC_FILE_MKCHAR,
 230         TOMOYO_MAC_FILE_LINK,
 231         TOMOYO_MAC_FILE_RENAME,
 232         TOMOYO_MAC_FILE_CHMOD,
 233         TOMOYO_MAC_FILE_CHOWN,
 234         TOMOYO_MAC_FILE_CHGRP,
 235         TOMOYO_MAC_FILE_IOCTL,
 236         TOMOYO_MAC_FILE_CHROOT,
 237         TOMOYO_MAC_FILE_MOUNT,
 238         TOMOYO_MAC_FILE_UMOUNT,
 239         TOMOYO_MAC_FILE_PIVOT_ROOT,
 240         TOMOYO_MAX_MAC_INDEX
 241 };
 242
 243 /* Index numbers for category of functionality. */
 244 enum tomoyo_mac_category_index {
 245         TOMOYO_MAC_CATEGORY_FILE,
 246         TOMOYO_MAX_MAC_CATEGORY_INDEX
 247 };
 248
 249 /*
 250  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 251  * occurred in enforcing mode and the userspace daemon decided to retry.
 252  *
 253  * We must choose a positive value in order to distinguish "granted" (which is
 254  * 0) and "rejected" (which is a negative value) and "retry".
 255  */
 256 #define TOMOYO_RETRY_REQUEST 1
 257
 258 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 259 enum tomoyo_policy_stat_type {
 260         /* Do not change this order. */
 261         TOMOYO_STAT_POLICY_UPDATES,
 262         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 263         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 264         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 265         TOMOYO_MAX_POLICY_STAT
 266 };
 267
 268 /* Index numbers for profile's PREFERENCE values. */
 269 enum tomoyo_pref_index {
 270         TOMOYO_PREF_MAX_AUDIT_LOG,
 271         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 272         TOMOYO_MAX_PREF
 273 };
 274
 275 /********** Structure definitions. **********/
 276
 277 /* Common header for holding ACL entries. */
 278 struct tomoyo_acl_head {
 279         struct list_head list;
 280         bool is_deleted;
 281 } __packed;
 282
 283 /* Common header for shared entries. */
 284 struct tomoyo_shared_acl_head {
 285         struct list_head list;
 286         atomic_t users;
 287 } __packed;
 288
 289 struct tomoyo_policy_namespace;
 290
 291 /* Structure for request info. */
 292 struct tomoyo_request_info {
 293         struct tomoyo_domain_info *domain;
 294         /* For holding parameters. */
 295         union {
 296                 struct {
 297                         const struct tomoyo_path_info *filename;
 298                         /* For using wildcards at tomoyo_find_next_domain(). */
 299                         const struct tomoyo_path_info *matched_path;
 300                         /* One of values in "enum tomoyo_path_acl_index". */
 301                         u8 operation;
 302                 } path;
 303                 struct {
 304                         const struct tomoyo_path_info *filename1;
 305                         const struct tomoyo_path_info *filename2;
 306                         /* One of values in "enum tomoyo_path2_acl_index". */
 307                         u8 operation;
 308                 } path2;
 309                 struct {
 310                         const struct tomoyo_path_info *filename;
 311                         unsigned int mode;
 312                         unsigned int major;
 313                         unsigned int minor;
 314                         /* One of values in "enum tomoyo_mkdev_acl_index". */
 315                         u8 operation;
 316                 } mkdev;
 317                 struct {
 318                         const struct tomoyo_path_info *filename;
 319                         unsigned long number;
 320                         /*
 321                          * One of values in
 322                          * "enum tomoyo_path_number_acl_index".
 323                          */
 324                         u8 operation;
 325                 } path_number;
 326                 struct {
 327                         const struct tomoyo_path_info *type;
 328                         const struct tomoyo_path_info *dir;
 329                         const struct tomoyo_path_info *dev;
 330                         unsigned long flags;
 331                         int need_dev;
 332                 } mount;
 333         } param;
 334         u8 param_type;
 335         bool granted;
 336         u8 retry;
 337         u8 profile;
 338         u8 mode; /* One of tomoyo_mode_index . */
 339         u8 type;
 340 };
 341
 342 /* Structure for holding a token. */
 343 struct tomoyo_path_info {
 344         const char *name;
 345         u32 hash;          /* = full_name_hash(name, strlen(name)) */
 346         u16 const_len;     /* = tomoyo_const_part_length(name)     */
 347         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 348         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 349 };
 350
 351 /* Structure for holding string data. */
 352 struct tomoyo_name {
 353         struct tomoyo_shared_acl_head head;
 354         struct tomoyo_path_info entry;
 355 };
 356
 357 /* Structure for holding a word. */
 358 struct tomoyo_name_union {
 359         /* Either @filename or @group is NULL. */
 360         const struct tomoyo_path_info *filename;
 361         struct tomoyo_group *group;
 362 };
 363
 364 /* Structure for holding a number. */
 365 struct tomoyo_number_union {
 366         unsigned long values[2];
 367         struct tomoyo_group *group; /* Maybe NULL. */
 368         /* One of values in "enum tomoyo_value_type". */
 369         u8 value_type[2];
 370 };
 371
 372 /* Structure for "path_group"/"number_group" directive. */
 373 struct tomoyo_group {
 374         struct tomoyo_shared_acl_head head;
 375         const struct tomoyo_path_info *group_name;
 376         struct list_head member_list;
 377 };
 378
 379 /* Structure for "path_group" directive. */
 380 struct tomoyo_path_group {
 381         struct tomoyo_acl_head head;
 382         const struct tomoyo_path_info *member_name;
 383 };
 384
 385 /* Structure for "number_group" directive. */
 386 struct tomoyo_number_group {
 387         struct tomoyo_acl_head head;
 388         struct tomoyo_number_union number;
 389 };
 390
 391 /* Structure for entries which follows "struct tomoyo_condition". */
 392 struct tomoyo_condition_element {
 393         /* Left hand operand. */
 394         u8 left;
 395         /* Right hand operand. */
 396         u8 right;
 397         /* Equation operator. True if equals or overlaps, false otherwise. */
 398         bool equals;
 399 };
 400
 401 /* Structure for optional arguments. */
 402 struct tomoyo_condition {
 403         struct tomoyo_shared_acl_head head;
 404         u32 size; /* Memory size allocated for this entry. */
 405         u16 condc; /* Number of conditions in this struct. */
 406         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 407         /*
 408          * struct tomoyo_condition_element condition[condc];
 409          * struct tomoyo_number_union values[numbers_count];
 410          */
 411 };
 412
 413 /* Common header for individual entries. */
 414 struct tomoyo_acl_info {
 415         struct list_head list;
 416         struct tomoyo_condition *cond; /* Maybe NULL. */
 417         bool is_deleted;
 418         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 419 } __packed;
 420
 421 /* Structure for domain information. */
 422 struct tomoyo_domain_info {
 423         struct list_head list;
 424         struct list_head acl_info_list;
 425         /* Name of this domain. Never NULL.          */
 426         const struct tomoyo_path_info *domainname;
 427         /* Namespace for this domain. Never NULL. */
 428         struct tomoyo_policy_namespace *ns;
 429         u8 profile;        /* Profile number to use. */
 430         u8 group;          /* Group number to use.   */
 431         bool is_deleted;   /* Delete flag.           */
 432         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 433         atomic_t users; /* Number of referring credentials. */
 434 };
 435
 436 /*
 437  * Structure for "file execute", "file read", "file write", "file append",
 438  * "file unlink", "file getattr", "file rmdir", "file truncate",
 439  * "file symlink", "file chroot" and "file unmount" directive.
 440  */
 441 struct tomoyo_path_acl {
 442         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 443         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 444         struct tomoyo_name_union name;
 445 };
 446
 447 /*
 448  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 449  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 450  */
 451 struct tomoyo_path_number_acl {
 452         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 453         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 454         u8 perm;
 455         struct tomoyo_name_union name;
 456         struct tomoyo_number_union number;
 457 };
 458
 459 /* Structure for "file mkblock" and "file mkchar" directive. */
 460 struct tomoyo_mkdev_acl {
 461         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 462         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 463         struct tomoyo_name_union name;
 464         struct tomoyo_number_union mode;
 465         struct tomoyo_number_union major;
 466         struct tomoyo_number_union minor;
 467 };
 468
 469 /*
 470  * Structure for "file rename", "file link" and "file pivot_root" directive.
 471  */
 472 struct tomoyo_path2_acl {
 473         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 474         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 475         struct tomoyo_name_union name1;
 476         struct tomoyo_name_union name2;
 477 };
 478
 479 /* Structure for "file mount" directive. */
 480 struct tomoyo_mount_acl {
 481         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 482         struct tomoyo_name_union dev_name;
 483         struct tomoyo_name_union dir_name;
 484         struct tomoyo_name_union fs_type;
 485         struct tomoyo_number_union flags;
 486 };
 487
 488 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 489 struct tomoyo_acl_param {
 490         char *data;
 491         struct list_head *list;
 492         struct tomoyo_policy_namespace *ns;
 493         bool is_delete;
 494 };
 495
 496 #define TOMOYO_MAX_IO_READ_QUEUE 64
 497
 498 /*
 499  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 500  * interfaces.
 501  */
 502 struct tomoyo_io_buffer {
 503         void (*read) (struct tomoyo_io_buffer *);
 504         int (*write) (struct tomoyo_io_buffer *);
 505         int (*poll) (struct file *file, poll_table *wait);
 506         /* Exclusive lock for this structure.   */
 507         struct mutex io_sem;
 508         char __user *read_user_buf;
 509         size_t read_user_buf_avail;
 510         struct {
 511                 struct list_head *ns;
 512                 struct list_head *domain;
 513                 struct list_head *group;
 514                 struct list_head *acl;
 515                 size_t avail;
 516                 unsigned int step;
 517                 unsigned int query_index;
 518                 u16 index;
 519                 u16 cond_index;
 520                 u8 acl_group_index;
 521                 u8 cond_step;
 522                 u8 bit;
 523                 u8 w_pos;
 524                 bool eof;
 525                 bool print_this_domain_only;
 526                 bool print_transition_related_only;
 527                 bool print_cond_part;
 528                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 529         } r;
 530         struct {
 531                 struct tomoyo_policy_namespace *ns;
 532                 /* The position currently writing to.   */
 533                 struct tomoyo_domain_info *domain;
 534                 /* Bytes available for writing.         */
 535                 size_t avail;
 536                 bool is_delete;
 537         } w;
 538         /* Buffer for reading.                  */
 539         char *read_buf;
 540         /* Size of read buffer.                 */
 541         size_t readbuf_size;
 542         /* Buffer for writing.                  */
 543         char *write_buf;
 544         /* Size of write buffer.                */
 545         size_t writebuf_size;
 546         /* Type of this interface.              */
 547         enum tomoyo_securityfs_interface_index type;
 548         /* Users counter protected by tomoyo_io_buffer_list_lock. */
 549         u8 users;
 550         /* List for telling GC not to kfree() elements. */
 551         struct list_head list;
 552 };
 553
 554 /*
 555  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 556  * "no_keep_domain" keyword.
 557  */
 558 struct tomoyo_transition_control {
 559         struct tomoyo_acl_head head;
 560         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 561         /* True if the domainname is tomoyo_get_last_name(). */
 562         bool is_last_name;
 563         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 564         const struct tomoyo_path_info *program;    /* Maybe NULL */
 565 };
 566
 567 /* Structure for "aggregator" keyword. */
 568 struct tomoyo_aggregator {
 569         struct tomoyo_acl_head head;
 570         const struct tomoyo_path_info *original_name;
 571         const struct tomoyo_path_info *aggregated_name;
 572 };
 573
 574 /* Structure for policy manager. */
 575 struct tomoyo_manager {
 576         struct tomoyo_acl_head head;
 577         bool is_domain;  /* True if manager is a domainname. */
 578         /* A path to program or a domainname. */
 579         const struct tomoyo_path_info *manager;
 580 };
 581
 582 struct tomoyo_preference {
 583         unsigned int learning_max_entry;
 584         bool enforcing_verbose;
 585         bool learning_verbose;
 586         bool permissive_verbose;
 587 };
 588
 589 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 590 struct tomoyo_profile {
 591         const struct tomoyo_path_info *comment;
 592         struct tomoyo_preference *learning;
 593         struct tomoyo_preference *permissive;
 594         struct tomoyo_preference *enforcing;
 595         struct tomoyo_preference preference;
 596         u8 default_config;
 597         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 598         unsigned int pref[TOMOYO_MAX_PREF];
 599 };
 600
 601 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 602 struct tomoyo_time {
 603         u16 year;
 604         u8 month;
 605         u8 day;
 606         u8 hour;
 607         u8 min;
 608         u8 sec;
 609 };
 610
 611 /* Structure for policy namespace. */
 612 struct tomoyo_policy_namespace {
 613         /* Profile table. Memory is allocated as needed. */
 614         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 615         /* List of "struct tomoyo_group". */
 616         struct list_head group_list[TOMOYO_MAX_GROUP];
 617         /* List of policy. */
 618         struct list_head policy_list[TOMOYO_MAX_POLICY];
 619         /* The global ACL referred by "use_group" keyword. */
 620         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 621         /* List for connecting to tomoyo_namespace_list list. */
 622         struct list_head namespace_list;
 623         /* Profile version. Currently only 20100903 is defined. */
 624         unsigned int profile_version;
 625         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 626         const char *name;
 627 };
 628
 629 /********** Function prototypes. **********/
 630
 631 bool tomoyo_compare_number_union(const unsigned long value,
 632                                  const struct tomoyo_number_union *ptr);
 633 bool tomoyo_condition(struct tomoyo_request_info *r,
 634                       const struct tomoyo_condition *cond);
 635 bool tomoyo_correct_domain(const unsigned char *domainname);
 636 bool tomoyo_correct_path(const char *filename);
 637 bool tomoyo_correct_word(const char *string);
 638 bool tomoyo_domain_def(const unsigned char *buffer);
 639 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 640 bool tomoyo_memory_ok(void *ptr);
 641 bool tomoyo_number_matches_group(const unsigned long min,
 642                                  const unsigned long max,
 643                                  const struct tomoyo_group *group);
 644 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 645                              struct tomoyo_name_union *ptr);
 646 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 647                                struct tomoyo_number_union *ptr);
 648 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 649                                  const struct tomoyo_path_info *pattern);
 650 bool tomoyo_permstr(const char *string, const char *keyword);
 651 bool tomoyo_str_starts(char **src, const char *find);
 652 char *tomoyo_encode(const char *str);
 653 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 654                       va_list args);
 655 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 656 char *tomoyo_realpath_from_path(struct path *path);
 657 char *tomoyo_realpath_nofollow(const char *pathname);
 658 const char *tomoyo_get_exe(void);
 659 const char *tomoyo_yesno(const unsigned int value);
 660 const struct tomoyo_path_info *tomoyo_compare_name_union
 661 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 662 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 663 const struct tomoyo_path_info *tomoyo_path_matches_group
 664 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 665 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 666                                  struct path *path, const int flag);
 667 int tomoyo_close_control(struct tomoyo_io_buffer *head);
 668 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 669 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 670                     const u8 index);
 671 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 672                              struct tomoyo_domain_info *domain,
 673                              const u8 index);
 674 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
 675                       const unsigned int mode, unsigned int dev);
 676 int tomoyo_mount_permission(char *dev_name, struct path *path,
 677                             const char *type, unsigned long flags,
 678                             void *data_page);
 679 int tomoyo_open_control(const u8 type, struct file *file);
 680 int tomoyo_path2_perm(const u8 operation, struct path *path1,
 681                       struct path *path2);
 682 int tomoyo_path_number_perm(const u8 operation, struct path *path,
 683                             unsigned long number);
 684 int tomoyo_path_perm(const u8 operation, struct path *path);
 685 int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 686                            const struct tomoyo_path_info *filename);
 687 int tomoyo_poll_control(struct file *file, poll_table *wait);
 688 int tomoyo_poll_log(struct file *file, poll_table *wait);
 689 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 690         __printf(2, 3);
 691 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 692                          struct tomoyo_acl_param *param,
 693                          bool (*check_duplicate)
 694                          (const struct tomoyo_acl_info *,
 695                           const struct tomoyo_acl_info *),
 696                          bool (*merge_duplicate)
 697                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
 698                           const bool));
 699 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
 700                          struct tomoyo_acl_param *param,
 701                          bool (*check_duplicate)
 702                          (const struct tomoyo_acl_head *,
 703                           const struct tomoyo_acl_head *));
 704 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
 705 int tomoyo_write_file(struct tomoyo_acl_param *param);
 706 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
 707 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
 708                                     const u8 type);
 709 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
 710                             const int buffer_len);
 711 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
 712                              const char __user *buffer, const int buffer_len);
 713 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
 714 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
 715                                                 const bool transit);
 716 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
 717 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
 718                                       const u8 idx);
 719 struct tomoyo_policy_namespace *tomoyo_assign_namespace
 720 (const char *domainname);
 721 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
 722                                       const u8 profile);
 723 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
 724                                 const u8 index);
 725 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
 726 void *tomoyo_commit_ok(void *data, const unsigned int size);
 727 void __init tomoyo_load_builtin_policy(void);
 728 void __init tomoyo_mm_init(void);
 729 void tomoyo_check_acl(struct tomoyo_request_info *r,
 730                       bool (*check_entry) (struct tomoyo_request_info *,
 731                                            const struct tomoyo_acl_info *));
 732 void tomoyo_check_profile(void);
 733 void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
 734 void tomoyo_del_condition(struct list_head *element);
 735 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
 736 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
 737 void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
 738          __printf(2, 3);
 739 void tomoyo_load_policy(const char *filename);
 740 void tomoyo_memory_free(void *ptr);
 741 void tomoyo_normalize_line(unsigned char *buffer);
 742 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
 743 void tomoyo_print_ulong(char *buffer, const int buffer_len,
 744                         const unsigned long value, const u8 type);
 745 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
 746 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
 747 void tomoyo_read_log(struct tomoyo_io_buffer *head);
 748 void tomoyo_update_stat(const u8 index);
 749 void tomoyo_warn_oom(const char *function);
 750 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
 751         __printf(2, 3);
 752 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
 753                        va_list args);
 754
 755 /********** External variable definitions. **********/
 756
 757 extern bool tomoyo_policy_loaded;
 758 extern const char * const tomoyo_condition_keyword
 759 [TOMOYO_MAX_CONDITION_KEYWORD];
 760 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 761 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
 762                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 763 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
 764 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
 765 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
 766 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 767 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
 768 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
 769 extern struct list_head tomoyo_condition_list;
 770 extern struct list_head tomoyo_domain_list;
 771 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
 772 extern struct list_head tomoyo_namespace_list;
 773 extern struct mutex tomoyo_policy_lock;
 774 extern struct srcu_struct tomoyo_ss;
 775 extern struct tomoyo_domain_info tomoyo_kernel_domain;
 776 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
 777 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
 778 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
 779
 780 /********** Inlined functions. **********/
 781
 782 /**
 783  * tomoyo_read_lock - Take lock for protecting policy.
 784  *
 785  * Returns index number for tomoyo_read_unlock().
 786  */
 787 static inline int tomoyo_read_lock(void)
 788 {
 789         return srcu_read_lock(&tomoyo_ss);
 790 }
 791
 792 /**
 793  * tomoyo_read_unlock - Release lock for protecting policy.
 794  *
 795  * @idx: Index number returned by tomoyo_read_lock().
 796  *
 797  * Returns nothing.
 798  */
 799 static inline void tomoyo_read_unlock(int idx)
 800 {
 801         srcu_read_unlock(&tomoyo_ss, idx);
 802 }
 803
 804 /**
 805  * tomoyo_sys_getppid - Copy of getppid().
 806  *
 807  * Returns parent process's PID.
 808  *
 809  * Alpha does not have getppid() defined. To be able to build this module on
 810  * Alpha, I have to copy getppid() from kernel/timer.c.
 811  */
 812 static inline pid_t tomoyo_sys_getppid(void)
 813 {
 814         pid_t pid;
 815         rcu_read_lock();
 816         pid = task_tgid_vnr(current->real_parent);
 817         rcu_read_unlock();
 818         return pid;
 819 }
 820
 821 /**
 822  * tomoyo_sys_getpid - Copy of getpid().
 823  *
 824  * Returns current thread's PID.
 825  *
 826  * Alpha does not have getpid() defined. To be able to build this module on
 827  * Alpha, I have to copy getpid() from kernel/timer.c.
 828  */
 829 static inline pid_t tomoyo_sys_getpid(void)
 830 {
 831         return task_tgid_vnr(current);
 832 }
 833
 834 /**
 835  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
 836  *
 837  * @a: Pointer to "struct tomoyo_path_info".
 838  * @b: Pointer to "struct tomoyo_path_info".
 839  *
 840  * Returns true if @a == @b, false otherwise.
 841  */
 842 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
 843                                   const struct tomoyo_path_info *b)
 844 {
 845         return a->hash != b->hash || strcmp(a->name, b->name);
 846 }
 847
 848 /**
 849  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
 850  *
 851  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
 852  *
 853  * Returns nothing.
 854  */
 855 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
 856 {
 857         if (name) {
 858                 struct tomoyo_name *ptr =
 859                         container_of(name, typeof(*ptr), entry);
 860                 atomic_dec(&ptr->head.users);
 861         }
 862 }
 863
 864 /**
 865  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
 866  *
 867  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
 868  *
 869  * Returns nothing.
 870  */
 871 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
 872 {
 873         if (cond)
 874                 atomic_dec(&cond->head.users);
 875 }
 876
 877 /**
 878  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
 879  *
 880  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
 881  *
 882  * Returns nothing.
 883  */
 884 static inline void tomoyo_put_group(struct tomoyo_group *group)
 885 {
 886         if (group)
 887                 atomic_dec(&group->head.users);
 888 }
 889
 890 /**
 891  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
 892  *
 893  * Returns pointer to "struct tomoyo_domain_info" for current thread.
 894  */
 895 static inline struct tomoyo_domain_info *tomoyo_domain(void)
 896 {
 897         return current_cred()->security;
 898 }
 899
 900 /**
 901  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
 902  *
 903  * @task: Pointer to "struct task_struct".
 904  *
 905  * Returns pointer to "struct tomoyo_security" for specified thread.
 906  */
 907 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
 908                                                             *task)
 909 {
 910         return task_cred_xxx(task, security);
 911 }
 912
 913 /**
 914  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
 915  *
 916  * @a: Pointer to "struct tomoyo_name_union".
 917  * @b: Pointer to "struct tomoyo_name_union".
 918  *
 919  * Returns true if @a == @b, false otherwise.
 920  */
 921 static inline bool tomoyo_same_name_union
 922 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
 923 {
 924         return a->filename == b->filename && a->group == b->group;
 925 }
 926
 927 /**
 928  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
 929  *
 930  * @a: Pointer to "struct tomoyo_number_union".
 931  * @b: Pointer to "struct tomoyo_number_union".
 932  *
 933  * Returns true if @a == @b, false otherwise.
 934  */
 935 static inline bool tomoyo_same_number_union
 936 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
 937 {
 938         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
 939                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
 940                 a->value_type[1] == b->value_type[1];
 941 }
 942
 943 /**
 944  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
 945  *
 946  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
 947  */
 948 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
 949 {
 950         return tomoyo_domain()->ns;
 951 }
 952
 953 #if defined(CONFIG_SLOB)
 954
 955 /**
 956  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 957  *
 958  * @size: Size to be rounded up.
 959  *
 960  * Returns @size.
 961  *
 962  * Since SLOB does not round up, this function simply returns @size.
 963  */
 964 static inline int tomoyo_round2(size_t size)
 965 {
 966         return size;
 967 }
 968
 969 #else
 970
 971 /**
 972  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 973  *
 974  * @size: Size to be rounded up.
 975  *
 976  * Returns rounded size.
 977  *
 978  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
 979  * (e.g.) 128 bytes.
 980  */
 981 static inline int tomoyo_round2(size_t size)
 982 {
 983 #if PAGE_SIZE == 4096
 984         size_t bsize = 32;
 985 #else
 986         size_t bsize = 64;
 987 #endif
 988         if (!size)
 989                 return 0;
 990         while (size > bsize)
 991                 bsize <<= 1;
 992         return bsize;
 993 }
 994
 995 #endif
 996
 997 /**
 998  * list_for_each_cookie - iterate over a list with cookie.
 999  * @pos:        the &struct list_head to use as a loop cursor.
1000  * @head:       the head for your list.
1001  */
1002 #define list_for_each_cookie(pos, head)                                 \
1003         if (!pos)                                                       \
1004                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1005         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1006
1007 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */