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