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 struct linux_binprm;
  25
  26 /********** Constants definitions. **********/
  27
  28 /*
  29  * TOMOYO uses this hash only when appending a string into the string
  30  * table. Frequency of appending strings is very low. So we don't need
  31  * large (e.g. 64k) hash size. 256 will be sufficient.
  32  */
  33 #define TOMOYO_HASH_BITS  8
  34 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  35
  36 #define TOMOYO_EXEC_TMPSIZE     4096
  37
  38 /* Profile number is an integer between 0 and 255. */
  39 #define TOMOYO_MAX_PROFILES 256
  40
  41 /* Group number is an integer between 0 and 255. */
  42 #define TOMOYO_MAX_ACL_GROUPS 256
  43
  44 /* Index numbers for operation mode. */
  45 enum tomoyo_mode_index {
  46         TOMOYO_CONFIG_DISABLED,
  47         TOMOYO_CONFIG_LEARNING,
  48         TOMOYO_CONFIG_PERMISSIVE,
  49         TOMOYO_CONFIG_ENFORCING,
  50         TOMOYO_CONFIG_MAX_MODE,
  51         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
  52         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
  53         TOMOYO_CONFIG_USE_DEFAULT     = 255,
  54 };
  55
  56 /* Index numbers for entry type. */
  57 enum tomoyo_policy_id {
  58         TOMOYO_ID_GROUP,
  59         TOMOYO_ID_PATH_GROUP,
  60         TOMOYO_ID_NUMBER_GROUP,
  61         TOMOYO_ID_TRANSITION_CONTROL,
  62         TOMOYO_ID_AGGREGATOR,
  63         TOMOYO_ID_MANAGER,
  64         TOMOYO_ID_NAME,
  65         TOMOYO_ID_ACL,
  66         TOMOYO_ID_DOMAIN,
  67         TOMOYO_MAX_POLICY
  68 };
  69
  70 /* Index numbers for group entries. */
  71 enum tomoyo_group_id {
  72         TOMOYO_PATH_GROUP,
  73         TOMOYO_NUMBER_GROUP,
  74         TOMOYO_MAX_GROUP
  75 };
  76
  77 /* Index numbers for type of numeric values. */
  78 enum tomoyo_value_type {
  79         TOMOYO_VALUE_TYPE_INVALID,
  80         TOMOYO_VALUE_TYPE_DECIMAL,
  81         TOMOYO_VALUE_TYPE_OCTAL,
  82         TOMOYO_VALUE_TYPE_HEXADECIMAL,
  83 };
  84
  85 /* Index numbers for domain transition control keywords. */
  86 enum tomoyo_transition_type {
  87         /* Do not change this order, */
  88         TOMOYO_TRANSITION_CONTROL_NO_RESET,
  89         TOMOYO_TRANSITION_CONTROL_RESET,
  90         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
  91         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
  92         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
  93         TOMOYO_TRANSITION_CONTROL_KEEP,
  94         TOMOYO_MAX_TRANSITION_TYPE
  95 };
  96
  97 /* Index numbers for Access Controls. */
  98 enum tomoyo_acl_entry_type_index {
  99         TOMOYO_TYPE_PATH_ACL,
 100         TOMOYO_TYPE_PATH2_ACL,
 101         TOMOYO_TYPE_PATH_NUMBER_ACL,
 102         TOMOYO_TYPE_MKDEV_ACL,
 103         TOMOYO_TYPE_MOUNT_ACL,
 104 };
 105
 106 /* Index numbers for access controls with one pathname. */
 107 enum tomoyo_path_acl_index {
 108         TOMOYO_TYPE_EXECUTE,
 109         TOMOYO_TYPE_READ,
 110         TOMOYO_TYPE_WRITE,
 111         TOMOYO_TYPE_APPEND,
 112         TOMOYO_TYPE_UNLINK,
 113         TOMOYO_TYPE_GETATTR,
 114         TOMOYO_TYPE_RMDIR,
 115         TOMOYO_TYPE_TRUNCATE,
 116         TOMOYO_TYPE_SYMLINK,
 117         TOMOYO_TYPE_CHROOT,
 118         TOMOYO_TYPE_UMOUNT,
 119         TOMOYO_MAX_PATH_OPERATION
 120 };
 121
 122 enum tomoyo_memory_stat_type {
 123         TOMOYO_MEMORY_POLICY,
 124         TOMOYO_MEMORY_AUDIT,
 125         TOMOYO_MEMORY_QUERY,
 126         TOMOYO_MAX_MEMORY_STAT
 127 };
 128
 129 enum tomoyo_mkdev_acl_index {
 130         TOMOYO_TYPE_MKBLOCK,
 131         TOMOYO_TYPE_MKCHAR,
 132         TOMOYO_MAX_MKDEV_OPERATION
 133 };
 134
 135 /* Index numbers for access controls with two pathnames. */
 136 enum tomoyo_path2_acl_index {
 137         TOMOYO_TYPE_LINK,
 138         TOMOYO_TYPE_RENAME,
 139         TOMOYO_TYPE_PIVOT_ROOT,
 140         TOMOYO_MAX_PATH2_OPERATION
 141 };
 142
 143 /* Index numbers for access controls with one pathname and one number. */
 144 enum tomoyo_path_number_acl_index {
 145         TOMOYO_TYPE_CREATE,
 146         TOMOYO_TYPE_MKDIR,
 147         TOMOYO_TYPE_MKFIFO,
 148         TOMOYO_TYPE_MKSOCK,
 149         TOMOYO_TYPE_IOCTL,
 150         TOMOYO_TYPE_CHMOD,
 151         TOMOYO_TYPE_CHOWN,
 152         TOMOYO_TYPE_CHGRP,
 153         TOMOYO_MAX_PATH_NUMBER_OPERATION
 154 };
 155
 156 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 157 enum tomoyo_securityfs_interface_index {
 158         TOMOYO_DOMAINPOLICY,
 159         TOMOYO_EXCEPTIONPOLICY,
 160         TOMOYO_DOMAIN_STATUS,
 161         TOMOYO_PROCESS_STATUS,
 162         TOMOYO_MEMINFO,
 163         TOMOYO_SELFDOMAIN,
 164         TOMOYO_AUDIT,
 165         TOMOYO_VERSION,
 166         TOMOYO_PROFILE,
 167         TOMOYO_QUERY,
 168         TOMOYO_MANAGER
 169 };
 170
 171 /* Index numbers for special mount operations. */
 172 enum tomoyo_special_mount {
 173         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 174         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 175         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 176         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 177         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 178         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 179         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 180         TOMOYO_MAX_SPECIAL_MOUNT
 181 };
 182
 183 /* Index numbers for functionality. */
 184 enum tomoyo_mac_index {
 185         TOMOYO_MAC_FILE_EXECUTE,
 186         TOMOYO_MAC_FILE_OPEN,
 187         TOMOYO_MAC_FILE_CREATE,
 188         TOMOYO_MAC_FILE_UNLINK,
 189         TOMOYO_MAC_FILE_GETATTR,
 190         TOMOYO_MAC_FILE_MKDIR,
 191         TOMOYO_MAC_FILE_RMDIR,
 192         TOMOYO_MAC_FILE_MKFIFO,
 193         TOMOYO_MAC_FILE_MKSOCK,
 194         TOMOYO_MAC_FILE_TRUNCATE,
 195         TOMOYO_MAC_FILE_SYMLINK,
 196         TOMOYO_MAC_FILE_MKBLOCK,
 197         TOMOYO_MAC_FILE_MKCHAR,
 198         TOMOYO_MAC_FILE_LINK,
 199         TOMOYO_MAC_FILE_RENAME,
 200         TOMOYO_MAC_FILE_CHMOD,
 201         TOMOYO_MAC_FILE_CHOWN,
 202         TOMOYO_MAC_FILE_CHGRP,
 203         TOMOYO_MAC_FILE_IOCTL,
 204         TOMOYO_MAC_FILE_CHROOT,
 205         TOMOYO_MAC_FILE_MOUNT,
 206         TOMOYO_MAC_FILE_UMOUNT,
 207         TOMOYO_MAC_FILE_PIVOT_ROOT,
 208         TOMOYO_MAX_MAC_INDEX
 209 };
 210
 211 /* Index numbers for category of functionality. */
 212 enum tomoyo_mac_category_index {
 213         TOMOYO_MAC_CATEGORY_FILE,
 214         TOMOYO_MAX_MAC_CATEGORY_INDEX
 215 };
 216
 217 /*
 218  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 219  * occurred in enforcing mode and the userspace daemon decided to retry.
 220  *
 221  * We must choose a positive value in order to distinguish "granted" (which is
 222  * 0) and "rejected" (which is a negative value) and "retry".
 223  */
 224 #define TOMOYO_RETRY_REQUEST 1
 225
 226 /* Index numbers for profile's PREFERENCE values. */
 227 enum tomoyo_pref_index {
 228         TOMOYO_PREF_MAX_AUDIT_LOG,
 229         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 230         TOMOYO_MAX_PREF
 231 };
 232
 233 /********** Structure definitions. **********/
 234
 235 /* Common header for holding ACL entries. */
 236 struct tomoyo_acl_head {
 237         struct list_head list;
 238         bool is_deleted;
 239 } __packed;
 240
 241 /* Common header for shared entries. */
 242 struct tomoyo_shared_acl_head {
 243         struct list_head list;
 244         atomic_t users;
 245 } __packed;
 246
 247 struct tomoyo_policy_namespace;
 248
 249 /* Structure for request info. */
 250 struct tomoyo_request_info {
 251         struct tomoyo_domain_info *domain;
 252         /* For holding parameters. */
 253         union {
 254                 struct {
 255                         const struct tomoyo_path_info *filename;
 256                         /* For using wildcards at tomoyo_find_next_domain(). */
 257                         const struct tomoyo_path_info *matched_path;
 258                         /* One of values in "enum tomoyo_path_acl_index". */
 259                         u8 operation;
 260                 } path;
 261                 struct {
 262                         const struct tomoyo_path_info *filename1;
 263                         const struct tomoyo_path_info *filename2;
 264                         /* One of values in "enum tomoyo_path2_acl_index". */
 265                         u8 operation;
 266                 } path2;
 267                 struct {
 268                         const struct tomoyo_path_info *filename;
 269                         unsigned int mode;
 270                         unsigned int major;
 271                         unsigned int minor;
 272                         /* One of values in "enum tomoyo_mkdev_acl_index". */
 273                         u8 operation;
 274                 } mkdev;
 275                 struct {
 276                         const struct tomoyo_path_info *filename;
 277                         unsigned long number;
 278                         /*
 279                          * One of values in
 280                          * "enum tomoyo_path_number_acl_index".
 281                          */
 282                         u8 operation;
 283                 } path_number;
 284                 struct {
 285                         const struct tomoyo_path_info *type;
 286                         const struct tomoyo_path_info *dir;
 287                         const struct tomoyo_path_info *dev;
 288                         unsigned long flags;
 289                         int need_dev;
 290                 } mount;
 291         } param;
 292         u8 param_type;
 293         bool granted;
 294         u8 retry;
 295         u8 profile;
 296         u8 mode; /* One of tomoyo_mode_index . */
 297         u8 type;
 298 };
 299
 300 /* Structure for holding a token. */
 301 struct tomoyo_path_info {
 302         const char *name;
 303         u32 hash;          /* = full_name_hash(name, strlen(name)) */
 304         u16 const_len;     /* = tomoyo_const_part_length(name)     */
 305         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 306         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 307 };
 308
 309 /* Structure for holding string data. */
 310 struct tomoyo_name {
 311         struct tomoyo_shared_acl_head head;
 312         struct tomoyo_path_info entry;
 313 };
 314
 315 /* Structure for holding a word. */
 316 struct tomoyo_name_union {
 317         /* Either @filename or @group is NULL. */
 318         const struct tomoyo_path_info *filename;
 319         struct tomoyo_group *group;
 320 };
 321
 322 /* Structure for holding a number. */
 323 struct tomoyo_number_union {
 324         unsigned long values[2];
 325         struct tomoyo_group *group; /* Maybe NULL. */
 326         /* One of values in "enum tomoyo_value_type". */
 327         u8 value_type[2];
 328 };
 329
 330 /* Structure for "path_group"/"number_group" directive. */
 331 struct tomoyo_group {
 332         struct tomoyo_shared_acl_head head;
 333         const struct tomoyo_path_info *group_name;
 334         struct list_head member_list;
 335 };
 336
 337 /* Structure for "path_group" directive. */
 338 struct tomoyo_path_group {
 339         struct tomoyo_acl_head head;
 340         const struct tomoyo_path_info *member_name;
 341 };
 342
 343 /* Structure for "number_group" directive. */
 344 struct tomoyo_number_group {
 345         struct tomoyo_acl_head head;
 346         struct tomoyo_number_union number;
 347 };
 348
 349 /* Common header for individual entries. */
 350 struct tomoyo_acl_info {
 351         struct list_head list;
 352         bool is_deleted;
 353         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 354 } __packed;
 355
 356 /* Structure for domain information. */
 357 struct tomoyo_domain_info {
 358         struct list_head list;
 359         struct list_head acl_info_list;
 360         /* Name of this domain. Never NULL.          */
 361         const struct tomoyo_path_info *domainname;
 362         /* Namespace for this domain. Never NULL. */
 363         struct tomoyo_policy_namespace *ns;
 364         u8 profile;        /* Profile number to use. */
 365         u8 group;          /* Group number to use.   */
 366         bool is_deleted;   /* Delete flag.           */
 367         bool quota_warned; /* Quota warnning flag.   */
 368         bool transition_failed; /* Domain transition failed flag. */
 369         atomic_t users; /* Number of referring credentials. */
 370 };
 371
 372 /*
 373  * Structure for "file execute", "file read", "file write", "file append",
 374  * "file unlink", "file getattr", "file rmdir", "file truncate",
 375  * "file symlink", "file chroot" and "file unmount" directive.
 376  */
 377 struct tomoyo_path_acl {
 378         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 379         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 380         struct tomoyo_name_union name;
 381 };
 382
 383 /*
 384  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 385  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 386  */
 387 struct tomoyo_path_number_acl {
 388         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 389         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 390         u8 perm;
 391         struct tomoyo_name_union name;
 392         struct tomoyo_number_union number;
 393 };
 394
 395 /* Structure for "file mkblock" and "file mkchar" directive. */
 396 struct tomoyo_mkdev_acl {
 397         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 398         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 399         struct tomoyo_name_union name;
 400         struct tomoyo_number_union mode;
 401         struct tomoyo_number_union major;
 402         struct tomoyo_number_union minor;
 403 };
 404
 405 /*
 406  * Structure for "file rename", "file link" and "file pivot_root" directive.
 407  */
 408 struct tomoyo_path2_acl {
 409         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 410         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 411         struct tomoyo_name_union name1;
 412         struct tomoyo_name_union name2;
 413 };
 414
 415 /* Structure for "file mount" directive. */
 416 struct tomoyo_mount_acl {
 417         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 418         struct tomoyo_name_union dev_name;
 419         struct tomoyo_name_union dir_name;
 420         struct tomoyo_name_union fs_type;
 421         struct tomoyo_number_union flags;
 422 };
 423
 424 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 425 struct tomoyo_acl_param {
 426         char *data;
 427         struct list_head *list;
 428         struct tomoyo_policy_namespace *ns;
 429         bool is_delete;
 430 };
 431
 432 #define TOMOYO_MAX_IO_READ_QUEUE 64
 433
 434 /*
 435  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 436  * interfaces.
 437  */
 438 struct tomoyo_io_buffer {
 439         void (*read) (struct tomoyo_io_buffer *);
 440         int (*write) (struct tomoyo_io_buffer *);
 441         int (*poll) (struct file *file, poll_table *wait);
 442         /* Exclusive lock for this structure.   */
 443         struct mutex io_sem;
 444         char __user *read_user_buf;
 445         int read_user_buf_avail;
 446         struct {
 447                 struct list_head *ns;
 448                 struct list_head *domain;
 449                 struct list_head *group;
 450                 struct list_head *acl;
 451                 int avail;
 452                 int step;
 453                 int query_index;
 454                 u16 index;
 455                 u8 acl_group_index;
 456                 u8 bit;
 457                 u8 w_pos;
 458                 bool eof;
 459                 bool print_this_domain_only;
 460                 bool print_transition_related_only;
 461                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 462         } r;
 463         struct {
 464                 struct tomoyo_policy_namespace *ns;
 465                 /* The position currently writing to.   */
 466                 struct tomoyo_domain_info *domain;
 467                 /* Bytes available for writing.         */
 468                 int avail;
 469                 bool is_delete;
 470         } w;
 471         /* Buffer for reading.                  */
 472         char *read_buf;
 473         /* Size of read buffer.                 */
 474         int readbuf_size;
 475         /* Buffer for writing.                  */
 476         char *write_buf;
 477         /* Size of write buffer.                */
 478         int writebuf_size;
 479         /* Type of this interface.              */
 480         u8 type;
 481         /* Users counter protected by tomoyo_io_buffer_list_lock. */
 482         u8 users;
 483         /* List for telling GC not to kfree() elements. */
 484         struct list_head list;
 485 };
 486
 487 /*
 488  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 489  * "no_keep_domain" keyword.
 490  */
 491 struct tomoyo_transition_control {
 492         struct tomoyo_acl_head head;
 493         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 494         /* True if the domainname is tomoyo_get_last_name(). */
 495         bool is_last_name;
 496         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 497         const struct tomoyo_path_info *program;    /* Maybe NULL */
 498 };
 499
 500 /* Structure for "aggregator" keyword. */
 501 struct tomoyo_aggregator {
 502         struct tomoyo_acl_head head;
 503         const struct tomoyo_path_info *original_name;
 504         const struct tomoyo_path_info *aggregated_name;
 505 };
 506
 507 /* Structure for policy manager. */
 508 struct tomoyo_manager {
 509         struct tomoyo_acl_head head;
 510         bool is_domain;  /* True if manager is a domainname. */
 511         /* A path to program or a domainname. */
 512         const struct tomoyo_path_info *manager;
 513 };
 514
 515 struct tomoyo_preference {
 516         unsigned int learning_max_entry;
 517         bool enforcing_verbose;
 518         bool learning_verbose;
 519         bool permissive_verbose;
 520 };
 521
 522 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 523 struct tomoyo_profile {
 524         const struct tomoyo_path_info *comment;
 525         struct tomoyo_preference *learning;
 526         struct tomoyo_preference *permissive;
 527         struct tomoyo_preference *enforcing;
 528         struct tomoyo_preference preference;
 529         u8 default_config;
 530         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 531         unsigned int pref[TOMOYO_MAX_PREF];
 532 };
 533
 534 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 535 struct tomoyo_time {
 536         u16 year;
 537         u8 month;
 538         u8 day;
 539         u8 hour;
 540         u8 min;
 541         u8 sec;
 542 };
 543
 544 /* Structure for policy namespace. */
 545 struct tomoyo_policy_namespace {
 546         /* Profile table. Memory is allocated as needed. */
 547         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 548         /* List of "struct tomoyo_group". */
 549         struct list_head group_list[TOMOYO_MAX_GROUP];
 550         /* List of policy. */
 551         struct list_head policy_list[TOMOYO_MAX_POLICY];
 552         /* The global ACL referred by "use_group" keyword. */
 553         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 554         /* List for connecting to tomoyo_namespace_list list. */
 555         struct list_head namespace_list;
 556         /* Profile version. Currently only 20100903 is defined. */
 557         unsigned int profile_version;
 558         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 559         const char *name;
 560 };
 561
 562 /********** Function prototypes. **********/
 563
 564 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
 565 bool tomoyo_str_starts(char **src, const char *find);
 566 const char *tomoyo_get_exe(void);
 567 void tomoyo_normalize_line(unsigned char *buffer);
 568 void tomoyo_check_profile(void);
 569 int tomoyo_open_control(const u8 type, struct file *file);
 570 int tomoyo_close_control(struct tomoyo_io_buffer *head);
 571 int tomoyo_poll_control(struct file *file, poll_table *wait);
 572 int tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
 573                         const int buffer_len);
 574 int tomoyo_write_control(struct tomoyo_io_buffer *head,
 575                          const char __user *buffer, const int buffer_len);
 576 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 577 void tomoyo_warn_oom(const char *function);
 578 const struct tomoyo_path_info *
 579 tomoyo_compare_name_union(const struct tomoyo_path_info *name,
 580                           const struct tomoyo_name_union *ptr);
 581 bool tomoyo_compare_number_union(const unsigned long value,
 582                                  const struct tomoyo_number_union *ptr);
 583 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 584                     const u8 index);
 585 void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
 586         __attribute__ ((format(printf, 2, 3)));
 587 bool tomoyo_correct_domain(const unsigned char *domainname);
 588 bool tomoyo_correct_path(const char *filename);
 589 bool tomoyo_correct_word(const char *string);
 590 bool tomoyo_domain_def(const unsigned char *buffer);
 591 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 592                              struct tomoyo_name_union *ptr);
 593 const struct tomoyo_path_info *
 594 tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
 595                           const struct tomoyo_group *group);
 596 bool tomoyo_number_matches_group(const unsigned long min,
 597                                  const unsigned long max,
 598                                  const struct tomoyo_group *group);
 599 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 600                                  const struct tomoyo_path_info *pattern);
 601 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 602                                struct tomoyo_number_union *ptr);
 603 bool tomoyo_tokenize(char *buffer, char *w[], size_t size);
 604 bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
 605 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 606                              struct tomoyo_domain_info *domain,
 607                              const u8 index);
 608 int tomoyo_mount_permission(char *dev_name, struct path *path,
 609                             const char *type, unsigned long flags,
 610                             void *data_page);
 611 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
 612 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
 613                                     const u8 type);
 614 int tomoyo_write_file(struct tomoyo_acl_param *param);
 615 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
 616 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 617      __attribute__ ((format(printf, 2, 3)));
 618 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
 619 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
 620                                                 const bool transit);
 621 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
 622                                       const u8 profile);
 623 struct tomoyo_policy_namespace *tomoyo_assign_namespace
 624 (const char *domainname);
 625 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
 626                                       const u8 idx);
 627 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
 628                                 const u8 index);
 629 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
 630 void tomoyo_load_policy(const char *filename);
 631 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
 632 char *tomoyo_encode(const char *str);
 633 char *tomoyo_realpath_nofollow(const char *pathname);
 634 char *tomoyo_realpath_from_path(struct path *path);
 635 bool tomoyo_memory_ok(void *ptr);
 636 void *tomoyo_commit_ok(void *data, const unsigned int size);
 637 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 638 void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
 639 int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
 640 void __init tomoyo_mm_init(void);
 641 int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 642                            const struct tomoyo_path_info *filename);
 643 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 644                                  struct path *path, const int flag);
 645 int tomoyo_path_number_perm(const u8 operation, struct path *path,
 646                             unsigned long number);
 647 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
 648                       const unsigned int mode, unsigned int dev);
 649 int tomoyo_path_perm(const u8 operation, struct path *path);
 650 int tomoyo_path2_perm(const u8 operation, struct path *path1,
 651                       struct path *path2);
 652 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 653 void tomoyo_print_ulong(char *buffer, const int buffer_len,
 654                         const unsigned long value, const u8 type);
 655 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
 656 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
 657 void tomoyo_memory_free(void *ptr);
 658 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 659                          struct tomoyo_acl_param *param,
 660                          bool (*check_duplicate) (const struct tomoyo_acl_info
 661                                                   *,
 662                                                   const struct tomoyo_acl_info
 663                                                   *),
 664                          bool (*merge_duplicate) (struct tomoyo_acl_info *,
 665                                                   struct tomoyo_acl_info *,
 666                                                   const bool));
 667 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
 668                          struct tomoyo_acl_param *param,
 669                          bool (*check_duplicate) (const struct tomoyo_acl_head
 670                                                   *,
 671                                                   const struct tomoyo_acl_head
 672                                                   *));
 673 void tomoyo_check_acl(struct tomoyo_request_info *r,
 674                       bool (*check_entry) (struct tomoyo_request_info *,
 675                                            const struct tomoyo_acl_info *));
 676 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 677 bool tomoyo_permstr(const char *string, const char *keyword);
 678
 679 const char *tomoyo_yesno(const unsigned int value);
 680 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
 681         __attribute__ ((format(printf, 2, 3)));
 682 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
 683                        va_list args);
 684 void tomoyo_read_log(struct tomoyo_io_buffer *head);
 685 int tomoyo_poll_log(struct file *file, poll_table *wait);
 686 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 687                       va_list args);
 688
 689 /********** External variable definitions. **********/
 690
 691 /* Lock for GC. */
 692 extern struct srcu_struct tomoyo_ss;
 693
 694 /* The list for "struct tomoyo_domain_info". */
 695 extern struct list_head tomoyo_domain_list;
 696
 697 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
 698
 699 /* Lock for protecting policy. */
 700 extern struct mutex tomoyo_policy_lock;
 701
 702 /* Has /sbin/init started? */
 703 extern bool tomoyo_policy_loaded;
 704
 705 /* The kernel's domain. */
 706 extern struct tomoyo_domain_info tomoyo_kernel_domain;
 707 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
 708 extern struct list_head tomoyo_namespace_list;
 709
 710 extern const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
 711 extern const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION];
 712 extern const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION];
 713 extern const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 714
 715 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
 716 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
 717 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 718
 719 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
 720 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
 721 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
 722
 723 /********** Inlined functions. **********/
 724
 725 /**
 726  * tomoyo_read_lock - Take lock for protecting policy.
 727  *
 728  * Returns index number for tomoyo_read_unlock().
 729  */
 730 static inline int tomoyo_read_lock(void)
 731 {
 732         return srcu_read_lock(&tomoyo_ss);
 733 }
 734
 735 /**
 736  * tomoyo_read_unlock - Release lock for protecting policy.
 737  *
 738  * @idx: Index number returned by tomoyo_read_lock().
 739  *
 740  * Returns nothing.
 741  */
 742 static inline void tomoyo_read_unlock(int idx)
 743 {
 744         srcu_read_unlock(&tomoyo_ss, idx);
 745 }
 746
 747 /**
 748  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
 749  *
 750  * @a: Pointer to "struct tomoyo_path_info".
 751  * @b: Pointer to "struct tomoyo_path_info".
 752  *
 753  * Returns true if @a == @b, false otherwise.
 754  */
 755 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
 756                                   const struct tomoyo_path_info *b)
 757 {
 758         return a->hash != b->hash || strcmp(a->name, b->name);
 759 }
 760
 761 /**
 762  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
 763  *
 764  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
 765  *
 766  * Returns nothing.
 767  */
 768 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
 769 {
 770         if (name) {
 771                 struct tomoyo_name *ptr =
 772                         container_of(name, typeof(*ptr), entry);
 773                 atomic_dec(&ptr->head.users);
 774         }
 775 }
 776
 777 /**
 778  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
 779  *
 780  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
 781  *
 782  * Returns nothing.
 783  */
 784 static inline void tomoyo_put_group(struct tomoyo_group *group)
 785 {
 786         if (group)
 787                 atomic_dec(&group->head.users);
 788 }
 789
 790 /**
 791  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
 792  *
 793  * Returns pointer to "struct tomoyo_domain_info" for current thread.
 794  */
 795 static inline struct tomoyo_domain_info *tomoyo_domain(void)
 796 {
 797         return current_cred()->security;
 798 }
 799
 800 /**
 801  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
 802  *
 803  * @task: Pointer to "struct task_struct".
 804  *
 805  * Returns pointer to "struct tomoyo_security" for specified thread.
 806  */
 807 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
 808                                                             *task)
 809 {
 810         return task_cred_xxx(task, security);
 811 }
 812
 813 /**
 814  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
 815  *
 816  * @a: Pointer to "struct tomoyo_name_union".
 817  * @b: Pointer to "struct tomoyo_name_union".
 818  *
 819  * Returns true if @a == @b, false otherwise.
 820  */
 821 static inline bool tomoyo_same_name_union
 822 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
 823 {
 824         return a->filename == b->filename && a->group == b->group;
 825 }
 826
 827 /**
 828  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
 829  *
 830  * @a: Pointer to "struct tomoyo_number_union".
 831  * @b: Pointer to "struct tomoyo_number_union".
 832  *
 833  * Returns true if @a == @b, false otherwise.
 834  */
 835 static inline bool tomoyo_same_number_union
 836 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
 837 {
 838         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
 839                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
 840                 a->value_type[1] == b->value_type[1];
 841 }
 842
 843 /**
 844  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
 845  *
 846  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
 847  */
 848 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
 849 {
 850         return tomoyo_domain()->ns;
 851 }
 852
 853 #if defined(CONFIG_SLOB)
 854
 855 /**
 856  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 857  *
 858  * @size: Size to be rounded up.
 859  *
 860  * Returns @size.
 861  *
 862  * Since SLOB does not round up, this function simply returns @size.
 863  */
 864 static inline int tomoyo_round2(size_t size)
 865 {
 866         return size;
 867 }
 868
 869 #else
 870
 871 /**
 872  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 873  *
 874  * @size: Size to be rounded up.
 875  *
 876  * Returns rounded size.
 877  *
 878  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
 879  * (e.g.) 128 bytes.
 880  */
 881 static inline int tomoyo_round2(size_t size)
 882 {
 883 #if PAGE_SIZE == 4096
 884         size_t bsize = 32;
 885 #else
 886         size_t bsize = 64;
 887 #endif
 888         if (!size)
 889                 return 0;
 890         while (size > bsize)
 891                 bsize <<= 1;
 892         return bsize;
 893 }
 894
 895 #endif
 896
 897 /**
 898  * list_for_each_cookie - iterate over a list with cookie.
 899  * @pos:        the &struct list_head to use as a loop cursor.
 900  * @head:       the head for your list.
 901  */
 902 #define list_for_each_cookie(pos, head)                                 \
 903         if (!pos)                                                       \
 904                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
 905         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
 906
 907 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */