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