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 /* A domain definition starts with <kernel>. */
  78 #define TOMOYO_ROOT_NAME                         "<kernel>"
  79 #define TOMOYO_ROOT_NAME_LEN                     (sizeof(TOMOYO_ROOT_NAME) - 1)
  80
  81 /* Index numbers for type of numeric values. */
  82 enum tomoyo_value_type {
  83         TOMOYO_VALUE_TYPE_INVALID,
  84         TOMOYO_VALUE_TYPE_DECIMAL,
  85         TOMOYO_VALUE_TYPE_OCTAL,
  86         TOMOYO_VALUE_TYPE_HEXADECIMAL,
  87 };
  88
  89 /* Index numbers for domain transition control keywords. */
  90 enum tomoyo_transition_type {
  91         /* Do not change this order, */
  92         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
  93         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
  94         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
  95         TOMOYO_TRANSITION_CONTROL_KEEP,
  96         TOMOYO_MAX_TRANSITION_TYPE
  97 };
  98
  99 /* Index numbers for Access Controls. */
 100 enum tomoyo_acl_entry_type_index {
 101         TOMOYO_TYPE_PATH_ACL,
 102         TOMOYO_TYPE_PATH2_ACL,
 103         TOMOYO_TYPE_PATH_NUMBER_ACL,
 104         TOMOYO_TYPE_MKDEV_ACL,
 105         TOMOYO_TYPE_MOUNT_ACL,
 106 };
 107
 108 /* Index numbers for access controls with one pathname. */
 109 enum tomoyo_path_acl_index {
 110         TOMOYO_TYPE_EXECUTE,
 111         TOMOYO_TYPE_READ,
 112         TOMOYO_TYPE_WRITE,
 113         TOMOYO_TYPE_APPEND,
 114         TOMOYO_TYPE_UNLINK,
 115         TOMOYO_TYPE_GETATTR,
 116         TOMOYO_TYPE_RMDIR,
 117         TOMOYO_TYPE_TRUNCATE,
 118         TOMOYO_TYPE_SYMLINK,
 119         TOMOYO_TYPE_CHROOT,
 120         TOMOYO_TYPE_UMOUNT,
 121         TOMOYO_MAX_PATH_OPERATION
 122 };
 123
 124 enum tomoyo_memory_stat_type {
 125         TOMOYO_MEMORY_POLICY,
 126         TOMOYO_MEMORY_AUDIT,
 127         TOMOYO_MEMORY_QUERY,
 128         TOMOYO_MAX_MEMORY_STAT
 129 };
 130
 131 enum tomoyo_mkdev_acl_index {
 132         TOMOYO_TYPE_MKBLOCK,
 133         TOMOYO_TYPE_MKCHAR,
 134         TOMOYO_MAX_MKDEV_OPERATION
 135 };
 136
 137 /* Index numbers for access controls with two pathnames. */
 138 enum tomoyo_path2_acl_index {
 139         TOMOYO_TYPE_LINK,
 140         TOMOYO_TYPE_RENAME,
 141         TOMOYO_TYPE_PIVOT_ROOT,
 142         TOMOYO_MAX_PATH2_OPERATION
 143 };
 144
 145 /* Index numbers for access controls with one pathname and one number. */
 146 enum tomoyo_path_number_acl_index {
 147         TOMOYO_TYPE_CREATE,
 148         TOMOYO_TYPE_MKDIR,
 149         TOMOYO_TYPE_MKFIFO,
 150         TOMOYO_TYPE_MKSOCK,
 151         TOMOYO_TYPE_IOCTL,
 152         TOMOYO_TYPE_CHMOD,
 153         TOMOYO_TYPE_CHOWN,
 154         TOMOYO_TYPE_CHGRP,
 155         TOMOYO_MAX_PATH_NUMBER_OPERATION
 156 };
 157
 158 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 159 enum tomoyo_securityfs_interface_index {
 160         TOMOYO_DOMAINPOLICY,
 161         TOMOYO_EXCEPTIONPOLICY,
 162         TOMOYO_DOMAIN_STATUS,
 163         TOMOYO_PROCESS_STATUS,
 164         TOMOYO_MEMINFO,
 165         TOMOYO_SELFDOMAIN,
 166         TOMOYO_AUDIT,
 167         TOMOYO_VERSION,
 168         TOMOYO_PROFILE,
 169         TOMOYO_QUERY,
 170         TOMOYO_MANAGER
 171 };
 172
 173 /* Index numbers for special mount operations. */
 174 enum tomoyo_special_mount {
 175         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 176         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 177         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 178         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 179         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 180         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 181         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 182         TOMOYO_MAX_SPECIAL_MOUNT
 183 };
 184
 185 /* Index numbers for functionality. */
 186 enum tomoyo_mac_index {
 187         TOMOYO_MAC_FILE_EXECUTE,
 188         TOMOYO_MAC_FILE_OPEN,
 189         TOMOYO_MAC_FILE_CREATE,
 190         TOMOYO_MAC_FILE_UNLINK,
 191         TOMOYO_MAC_FILE_GETATTR,
 192         TOMOYO_MAC_FILE_MKDIR,
 193         TOMOYO_MAC_FILE_RMDIR,
 194         TOMOYO_MAC_FILE_MKFIFO,
 195         TOMOYO_MAC_FILE_MKSOCK,
 196         TOMOYO_MAC_FILE_TRUNCATE,
 197         TOMOYO_MAC_FILE_SYMLINK,
 198         TOMOYO_MAC_FILE_MKBLOCK,
 199         TOMOYO_MAC_FILE_MKCHAR,
 200         TOMOYO_MAC_FILE_LINK,
 201         TOMOYO_MAC_FILE_RENAME,
 202         TOMOYO_MAC_FILE_CHMOD,
 203         TOMOYO_MAC_FILE_CHOWN,
 204         TOMOYO_MAC_FILE_CHGRP,
 205         TOMOYO_MAC_FILE_IOCTL,
 206         TOMOYO_MAC_FILE_CHROOT,
 207         TOMOYO_MAC_FILE_MOUNT,
 208         TOMOYO_MAC_FILE_UMOUNT,
 209         TOMOYO_MAC_FILE_PIVOT_ROOT,
 210         TOMOYO_MAX_MAC_INDEX
 211 };
 212
 213 /* Index numbers for category of functionality. */
 214 enum tomoyo_mac_category_index {
 215         TOMOYO_MAC_CATEGORY_FILE,
 216         TOMOYO_MAX_MAC_CATEGORY_INDEX
 217 };
 218
 219 /*
 220  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 221  * occurred in enforcing mode and the userspace daemon decided to retry.
 222  *
 223  * We must choose a positive value in order to distinguish "granted" (which is
 224  * 0) and "rejected" (which is a negative value) and "retry".
 225  */
 226 #define TOMOYO_RETRY_REQUEST 1
 227
 228 /* Index numbers for profile's PREFERENCE values. */
 229 enum tomoyo_pref_index {
 230         TOMOYO_PREF_MAX_AUDIT_LOG,
 231         TOMOYO_PREF_MAX_LEARNING_ENTRY,
 232         TOMOYO_MAX_PREF
 233 };
 234
 235 /********** Structure definitions. **********/
 236
 237 /* Common header for holding ACL entries. */
 238 struct tomoyo_acl_head {
 239         struct list_head list;
 240         bool is_deleted;
 241 } __packed;
 242
 243 /* Common header for shared entries. */
 244 struct tomoyo_shared_acl_head {
 245         struct list_head list;
 246         atomic_t users;
 247 } __packed;
 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         u8 profile;        /* Profile number to use. */
 363         u8 group;          /* Group number to use.   */
 364         bool is_deleted;   /* Delete flag.           */
 365         bool quota_warned; /* Quota warnning flag.   */
 366         bool transition_failed; /* Domain transition failed flag. */
 367         atomic_t users; /* Number of referring credentials. */
 368 };
 369
 370 /*
 371  * Structure for "file execute", "file read", "file write", "file append",
 372  * "file unlink", "file getattr", "file rmdir", "file truncate",
 373  * "file symlink", "file chroot" and "file unmount" directive.
 374  */
 375 struct tomoyo_path_acl {
 376         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 377         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 378         struct tomoyo_name_union name;
 379 };
 380
 381 /*
 382  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 383  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 384  */
 385 struct tomoyo_path_number_acl {
 386         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 387         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 388         u8 perm;
 389         struct tomoyo_name_union name;
 390         struct tomoyo_number_union number;
 391 };
 392
 393 /* Structure for "file mkblock" and "file mkchar" directive. */
 394 struct tomoyo_mkdev_acl {
 395         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 396         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 397         struct tomoyo_name_union name;
 398         struct tomoyo_number_union mode;
 399         struct tomoyo_number_union major;
 400         struct tomoyo_number_union minor;
 401 };
 402
 403 /*
 404  * Structure for "file rename", "file link" and "file pivot_root" directive.
 405  */
 406 struct tomoyo_path2_acl {
 407         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 408         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 409         struct tomoyo_name_union name1;
 410         struct tomoyo_name_union name2;
 411 };
 412
 413 /* Structure for "file mount" directive. */
 414 struct tomoyo_mount_acl {
 415         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 416         struct tomoyo_name_union dev_name;
 417         struct tomoyo_name_union dir_name;
 418         struct tomoyo_name_union fs_type;
 419         struct tomoyo_number_union flags;
 420 };
 421
 422 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 423 struct tomoyo_acl_param {
 424         char *data;
 425         struct list_head *list;
 426         bool is_delete;
 427 };
 428
 429 #define TOMOYO_MAX_IO_READ_QUEUE 64
 430
 431 /*
 432  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 433  * interfaces.
 434  */
 435 struct tomoyo_io_buffer {
 436         void (*read) (struct tomoyo_io_buffer *);
 437         int (*write) (struct tomoyo_io_buffer *);
 438         int (*poll) (struct file *file, poll_table *wait);
 439         /* Exclusive lock for this structure.   */
 440         struct mutex io_sem;
 441         /* Index returned by tomoyo_read_lock(). */
 442         int reader_idx;
 443         char __user *read_user_buf;
 444         int read_user_buf_avail;
 445         struct {
 446                 struct list_head *domain;
 447                 struct list_head *group;
 448                 struct list_head *acl;
 449                 int avail;
 450                 int step;
 451                 int query_index;
 452                 u16 index;
 453                 u8 acl_group_index;
 454                 u8 bit;
 455                 u8 w_pos;
 456                 bool eof;
 457                 bool print_this_domain_only;
 458                 bool print_execute_only;
 459                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 460         } r;
 461         struct {
 462                 /* The position currently writing to.   */
 463                 struct tomoyo_domain_info *domain;
 464                 /* Bytes available for writing.         */
 465                 int avail;
 466         } w;
 467         /* Buffer for reading.                  */
 468         char *read_buf;
 469         /* Size of read buffer.                 */
 470         int readbuf_size;
 471         /* Buffer for writing.                  */
 472         char *write_buf;
 473         /* Size of write buffer.                */
 474         int writebuf_size;
 475         /* Type of this interface.              */
 476         u8 type;
 477 };
 478
 479 /*
 480  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 481  * "no_keep_domain" keyword.
 482  */
 483 struct tomoyo_transition_control {
 484         struct tomoyo_acl_head head;
 485         u8 type; /* One of values in "enum tomoyo_transition_type".  */
 486         /* True if the domainname is tomoyo_get_last_name(). */
 487         bool is_last_name;
 488         const struct tomoyo_path_info *domainname; /* Maybe NULL */
 489         const struct tomoyo_path_info *program;    /* Maybe NULL */
 490 };
 491
 492 /* Structure for "aggregator" keyword. */
 493 struct tomoyo_aggregator {
 494         struct tomoyo_acl_head head;
 495         const struct tomoyo_path_info *original_name;
 496         const struct tomoyo_path_info *aggregated_name;
 497 };
 498
 499 /* Structure for policy manager. */
 500 struct tomoyo_manager {
 501         struct tomoyo_acl_head head;
 502         bool is_domain;  /* True if manager is a domainname. */
 503         /* A path to program or a domainname. */
 504         const struct tomoyo_path_info *manager;
 505 };
 506
 507 struct tomoyo_preference {
 508         unsigned int learning_max_entry;
 509         bool enforcing_verbose;
 510         bool learning_verbose;
 511         bool permissive_verbose;
 512 };
 513
 514 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 515 struct tomoyo_profile {
 516         const struct tomoyo_path_info *comment;
 517         struct tomoyo_preference *learning;
 518         struct tomoyo_preference *permissive;
 519         struct tomoyo_preference *enforcing;
 520         struct tomoyo_preference preference;
 521         u8 default_config;
 522         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 523         unsigned int pref[TOMOYO_MAX_PREF];
 524 };
 525
 526 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
 527 struct tomoyo_time {
 528         u16 year;
 529         u8 month;
 530         u8 day;
 531         u8 hour;
 532         u8 min;
 533         u8 sec;
 534 };
 535
 536 /********** Function prototypes. **********/
 537
 538 bool tomoyo_str_starts(char **src, const char *find);
 539 const char *tomoyo_get_exe(void);
 540 void tomoyo_normalize_line(unsigned char *buffer);
 541 void tomoyo_check_profile(void);
 542 int tomoyo_open_control(const u8 type, struct file *file);
 543 int tomoyo_close_control(struct tomoyo_io_buffer *head);
 544 int tomoyo_poll_control(struct file *file, poll_table *wait);
 545 int tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
 546                         const int buffer_len);
 547 int tomoyo_write_control(struct tomoyo_io_buffer *head,
 548                          const char __user *buffer, const int buffer_len);
 549 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 550 void tomoyo_warn_oom(const char *function);
 551 const struct tomoyo_path_info *
 552 tomoyo_compare_name_union(const struct tomoyo_path_info *name,
 553                           const struct tomoyo_name_union *ptr);
 554 bool tomoyo_compare_number_union(const unsigned long value,
 555                                  const struct tomoyo_number_union *ptr);
 556 int tomoyo_get_mode(const u8 profile, const u8 index);
 557 void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
 558         __attribute__ ((format(printf, 2, 3)));
 559 bool tomoyo_correct_domain(const unsigned char *domainname);
 560 bool tomoyo_correct_path(const char *filename);
 561 bool tomoyo_correct_word(const char *string);
 562 bool tomoyo_domain_def(const unsigned char *buffer);
 563 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 564                              struct tomoyo_name_union *ptr);
 565 const struct tomoyo_path_info *
 566 tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
 567                           const struct tomoyo_group *group);
 568 bool tomoyo_number_matches_group(const unsigned long min,
 569                                  const unsigned long max,
 570                                  const struct tomoyo_group *group);
 571 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 572                                  const struct tomoyo_path_info *pattern);
 573 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 574                                struct tomoyo_number_union *ptr);
 575 bool tomoyo_tokenize(char *buffer, char *w[], size_t size);
 576 bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
 577 int tomoyo_init_request_info(struct tomoyo_request_info *r,
 578                              struct tomoyo_domain_info *domain,
 579                              const u8 index);
 580 int tomoyo_mount_permission(char *dev_name, struct path *path,
 581                             const char *type, unsigned long flags,
 582                             void *data_page);
 583 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
 584 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
 585                                     const u8 type);
 586 int tomoyo_write_file(struct tomoyo_acl_param *param);
 587 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
 588 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 589      __attribute__ ((format(printf, 2, 3)));
 590 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
 591 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
 592                                                 const u8 profile);
 593 struct tomoyo_profile *tomoyo_profile(const u8 profile);
 594 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
 595                                       const u8 idx);
 596 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
 597                                 const u8 index);
 598 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
 599 void tomoyo_load_policy(const char *filename);
 600 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
 601 char *tomoyo_encode(const char *str);
 602 char *tomoyo_realpath_nofollow(const char *pathname);
 603 char *tomoyo_realpath_from_path(struct path *path);
 604 bool tomoyo_memory_ok(void *ptr);
 605 void *tomoyo_commit_ok(void *data, const unsigned int size);
 606 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 607 void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
 608 int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
 609 void __init tomoyo_mm_init(void);
 610 int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 611                            const struct tomoyo_path_info *filename);
 612 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 613                                  struct path *path, const int flag);
 614 int tomoyo_path_number_perm(const u8 operation, struct path *path,
 615                             unsigned long number);
 616 int tomoyo_mkdev_perm(const u8 operation, struct path *path,
 617                       const unsigned int mode, unsigned int dev);
 618 int tomoyo_path_perm(const u8 operation, struct path *path);
 619 int tomoyo_path2_perm(const u8 operation, struct path *path1,
 620                       struct path *path2);
 621 int tomoyo_find_next_domain(struct linux_binprm *bprm);
 622 void tomoyo_print_ulong(char *buffer, const int buffer_len,
 623                         const unsigned long value, const u8 type);
 624 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
 625 void tomoyo_run_gc(void);
 626 void tomoyo_memory_free(void *ptr);
 627 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 628                          struct tomoyo_acl_param *param,
 629                          bool (*check_duplicate) (const struct tomoyo_acl_info
 630                                                   *,
 631                                                   const struct tomoyo_acl_info
 632                                                   *),
 633                          bool (*merge_duplicate) (struct tomoyo_acl_info *,
 634                                                   struct tomoyo_acl_info *,
 635                                                   const bool));
 636 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
 637                          struct tomoyo_acl_param *param,
 638                          bool (*check_duplicate) (const struct tomoyo_acl_head
 639                                                   *,
 640                                                   const struct tomoyo_acl_head
 641                                                   *));
 642 void tomoyo_check_acl(struct tomoyo_request_info *r,
 643                       bool (*check_entry) (struct tomoyo_request_info *,
 644                                            const struct tomoyo_acl_info *));
 645 char *tomoyo_read_token(struct tomoyo_acl_param *param);
 646 bool tomoyo_permstr(const char *string, const char *keyword);
 647
 648 const char *tomoyo_yesno(const unsigned int value);
 649 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
 650                        va_list args);
 651 void tomoyo_read_log(struct tomoyo_io_buffer *head);
 652 int tomoyo_poll_log(struct file *file, poll_table *wait);
 653 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 654                       va_list args);
 655
 656 /********** External variable definitions. **********/
 657
 658 /* Lock for GC. */
 659 extern struct srcu_struct tomoyo_ss;
 660
 661 /* The list for "struct tomoyo_domain_info". */
 662 extern struct list_head tomoyo_domain_list;
 663
 664 extern struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY];
 665 extern struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP];
 666 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
 667
 668 /* Lock for protecting policy. */
 669 extern struct mutex tomoyo_policy_lock;
 670
 671 /* Has /sbin/init started? */
 672 extern bool tomoyo_policy_loaded;
 673
 674 extern struct list_head tomoyo_acl_group[TOMOYO_MAX_ACL_GROUPS];
 675
 676 /* The kernel's domain. */
 677 extern struct tomoyo_domain_info tomoyo_kernel_domain;
 678
 679 extern const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
 680 extern const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION];
 681 extern const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION];
 682 extern const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 683
 684 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
 685 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
 686 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 687
 688 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
 689 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
 690 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
 691
 692 /********** Inlined functions. **********/
 693
 694 /**
 695  * tomoyo_read_lock - Take lock for protecting policy.
 696  *
 697  * Returns index number for tomoyo_read_unlock().
 698  */
 699 static inline int tomoyo_read_lock(void)
 700 {
 701         return srcu_read_lock(&tomoyo_ss);
 702 }
 703
 704 /**
 705  * tomoyo_read_unlock - Release lock for protecting policy.
 706  *
 707  * @idx: Index number returned by tomoyo_read_lock().
 708  *
 709  * Returns nothing.
 710  */
 711 static inline void tomoyo_read_unlock(int idx)
 712 {
 713         srcu_read_unlock(&tomoyo_ss, idx);
 714 }
 715
 716 /**
 717  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
 718  *
 719  * @a: Pointer to "struct tomoyo_path_info".
 720  * @b: Pointer to "struct tomoyo_path_info".
 721  *
 722  * Returns true if @a == @b, false otherwise.
 723  */
 724 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
 725                                   const struct tomoyo_path_info *b)
 726 {
 727         return a->hash != b->hash || strcmp(a->name, b->name);
 728 }
 729
 730 /**
 731  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
 732  *
 733  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
 734  *
 735  * Returns nothing.
 736  */
 737 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
 738 {
 739         if (name) {
 740                 struct tomoyo_name *ptr =
 741                         container_of(name, typeof(*ptr), entry);
 742                 atomic_dec(&ptr->head.users);
 743         }
 744 }
 745
 746 /**
 747  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
 748  *
 749  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
 750  *
 751  * Returns nothing.
 752  */
 753 static inline void tomoyo_put_group(struct tomoyo_group *group)
 754 {
 755         if (group)
 756                 atomic_dec(&group->head.users);
 757 }
 758
 759 /**
 760  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
 761  *
 762  * Returns pointer to "struct tomoyo_domain_info" for current thread.
 763  */
 764 static inline struct tomoyo_domain_info *tomoyo_domain(void)
 765 {
 766         return current_cred()->security;
 767 }
 768
 769 /**
 770  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
 771  *
 772  * @task: Pointer to "struct task_struct".
 773  *
 774  * Returns pointer to "struct tomoyo_security" for specified thread.
 775  */
 776 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
 777                                                             *task)
 778 {
 779         return task_cred_xxx(task, security);
 780 }
 781
 782 /**
 783  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
 784  *
 785  * @a: Pointer to "struct tomoyo_name_union".
 786  * @b: Pointer to "struct tomoyo_name_union".
 787  *
 788  * Returns true if @a == @b, false otherwise.
 789  */
 790 static inline bool tomoyo_same_name_union
 791 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
 792 {
 793         return a->filename == b->filename && a->group == b->group;
 794 }
 795
 796 /**
 797  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
 798  *
 799  * @a: Pointer to "struct tomoyo_number_union".
 800  * @b: Pointer to "struct tomoyo_number_union".
 801  *
 802  * Returns true if @a == @b, false otherwise.
 803  */
 804 static inline bool tomoyo_same_number_union
 805 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
 806 {
 807         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
 808                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
 809                 a->value_type[1] == b->value_type[1];
 810 }
 811
 812 #if defined(CONFIG_SLOB)
 813
 814 /**
 815  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 816  *
 817  * @size: Size to be rounded up.
 818  *
 819  * Returns @size.
 820  *
 821  * Since SLOB does not round up, this function simply returns @size.
 822  */
 823 static inline int tomoyo_round2(size_t size)
 824 {
 825         return size;
 826 }
 827
 828 #else
 829
 830 /**
 831  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
 832  *
 833  * @size: Size to be rounded up.
 834  *
 835  * Returns rounded size.
 836  *
 837  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
 838  * (e.g.) 128 bytes.
 839  */
 840 static inline int tomoyo_round2(size_t size)
 841 {
 842 #if PAGE_SIZE == 4096
 843         size_t bsize = 32;
 844 #else
 845         size_t bsize = 64;
 846 #endif
 847         if (!size)
 848                 return 0;
 849         while (size > bsize)
 850                 bsize <<= 1;
 851         return bsize;
 852 }
 853
 854 #endif
 855
 856 /**
 857  * list_for_each_cookie - iterate over a list with cookie.
 858  * @pos:        the &struct list_head to use as a loop cursor.
 859  * @head:       the head for your list.
 860  */
 861 #define list_for_each_cookie(pos, head)                                 \
 862         if (!pos)                                                       \
 863                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
 864         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
 865
 866 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */