1/*
   2 * security/tomoyo/common.h
   3 *
   4 * Header file for TOMOYO.
   5 *
   6 * Copyright (C) 2005-2011  NTT DATA CORPORATION
   7 */
   8
   9#ifndef _SECURITY_TOMOYO_COMMON_H
  10#define _SECURITY_TOMOYO_COMMON_H
  11
  12#include <linux/ctype.h>
  13#include <linux/string.h>
  14#include <linux/mm.h>
  15#include <linux/file.h>
  16#include <linux/kmod.h>
  17#include <linux/fs.h>
  18#include <linux/sched.h>
  19#include <linux/namei.h>
  20#include <linux/mount.h>
  21#include <linux/list.h>
  22#include <linux/cred.h>
  23#include <linux/poll.h>
  24#include <linux/binfmts.h>
  25#include <linux/highmem.h>
  26#include <linux/net.h>
  27#include <linux/inet.h>
  28#include <linux/in.h>
  29#include <linux/in6.h>
  30#include <linux/un.h>
  31#include <net/sock.h>
  32#include <net/af_unix.h>
  33#include <net/ip.h>
  34#include <net/ipv6.h>
  35#include <net/udp.h>
  36
  37/********** Constants definitions. **********/
  38
  39/*
  40 * TOMOYO uses this hash only when appending a string into the string
  41 * table. Frequency of appending strings is very low. So we don't need
  42 * large (e.g. 64k) hash size. 256 will be sufficient.
  43 */
  44#define TOMOYO_HASH_BITS  8
  45#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  46
  47/*
  48 * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
  49 * Therefore, we don't need SOCK_MAX.
  50 */
  51#define TOMOYO_SOCK_MAX 6
  52
  53#define TOMOYO_EXEC_TMPSIZE     4096
  54
  55/* Garbage collector is trying to kfree() this element. */
  56#define TOMOYO_GC_IN_PROGRESS -1
  57
  58/* Profile number is an integer between 0 and 255. */
  59#define TOMOYO_MAX_PROFILES 256
  60
  61/* Group number is an integer between 0 and 255. */
  62#define TOMOYO_MAX_ACL_GROUPS 256
  63
  64/* Index numbers for "struct tomoyo_condition". */
  65enum tomoyo_conditions_index {
  66	TOMOYO_TASK_UID,             /* current_uid()   */
  67	TOMOYO_TASK_EUID,            /* current_euid()  */
  68	TOMOYO_TASK_SUID,            /* current_suid()  */
  69	TOMOYO_TASK_FSUID,           /* current_fsuid() */
  70	TOMOYO_TASK_GID,             /* current_gid()   */
  71	TOMOYO_TASK_EGID,            /* current_egid()  */
  72	TOMOYO_TASK_SGID,            /* current_sgid()  */
  73	TOMOYO_TASK_FSGID,           /* current_fsgid() */
  74	TOMOYO_TASK_PID,             /* sys_getpid()   */
  75	TOMOYO_TASK_PPID,            /* sys_getppid()  */
  76	TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
  77	TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
  78	TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
  79	TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
  80	TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
  81	TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
  82	TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
  83	TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
  84	TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
  85	TOMOYO_MODE_SETUID,          /* S_ISUID */
  86	TOMOYO_MODE_SETGID,          /* S_ISGID */
  87	TOMOYO_MODE_STICKY,          /* S_ISVTX */
  88	TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
  89	TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
  90	TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
  91	TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
  92	TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
  93	TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
  94	TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
  95	TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
  96	TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
  97	TOMOYO_EXEC_REALPATH,
  98	TOMOYO_SYMLINK_TARGET,
  99	TOMOYO_PATH1_UID,
 100	TOMOYO_PATH1_GID,
 101	TOMOYO_PATH1_INO,
 102	TOMOYO_PATH1_MAJOR,
 103	TOMOYO_PATH1_MINOR,
 104	TOMOYO_PATH1_PERM,
 105	TOMOYO_PATH1_TYPE,
 106	TOMOYO_PATH1_DEV_MAJOR,
 107	TOMOYO_PATH1_DEV_MINOR,
 108	TOMOYO_PATH2_UID,
 109	TOMOYO_PATH2_GID,
 110	TOMOYO_PATH2_INO,
 111	TOMOYO_PATH2_MAJOR,
 112	TOMOYO_PATH2_MINOR,
 113	TOMOYO_PATH2_PERM,
 114	TOMOYO_PATH2_TYPE,
 115	TOMOYO_PATH2_DEV_MAJOR,
 116	TOMOYO_PATH2_DEV_MINOR,
 117	TOMOYO_PATH1_PARENT_UID,
 118	TOMOYO_PATH1_PARENT_GID,
 119	TOMOYO_PATH1_PARENT_INO,
 120	TOMOYO_PATH1_PARENT_PERM,
 121	TOMOYO_PATH2_PARENT_UID,
 122	TOMOYO_PATH2_PARENT_GID,
 123	TOMOYO_PATH2_PARENT_INO,
 124	TOMOYO_PATH2_PARENT_PERM,
 125	TOMOYO_MAX_CONDITION_KEYWORD,
 126	TOMOYO_NUMBER_UNION,
 127	TOMOYO_NAME_UNION,
 128	TOMOYO_ARGV_ENTRY,
 129	TOMOYO_ENVP_ENTRY,
 130};
 131
 132
 133/* Index numbers for stat(). */
 134enum tomoyo_path_stat_index {
 135	/* Do not change this order. */
 136	TOMOYO_PATH1,
 137	TOMOYO_PATH1_PARENT,
 138	TOMOYO_PATH2,
 139	TOMOYO_PATH2_PARENT,
 140	TOMOYO_MAX_PATH_STAT
 141};
 142
 143/* Index numbers for operation mode. */
 144enum tomoyo_mode_index {
 145	TOMOYO_CONFIG_DISABLED,
 146	TOMOYO_CONFIG_LEARNING,
 147	TOMOYO_CONFIG_PERMISSIVE,
 148	TOMOYO_CONFIG_ENFORCING,
 149	TOMOYO_CONFIG_MAX_MODE,
 150	TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
 151	TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
 152	TOMOYO_CONFIG_USE_DEFAULT     = 255,
 153};
 154
 155/* Index numbers for entry type. */
 156enum tomoyo_policy_id {
 157	TOMOYO_ID_GROUP,
 158	TOMOYO_ID_ADDRESS_GROUP,
 159	TOMOYO_ID_PATH_GROUP,
 160	TOMOYO_ID_NUMBER_GROUP,
 161	TOMOYO_ID_TRANSITION_CONTROL,
 162	TOMOYO_ID_AGGREGATOR,
 163	TOMOYO_ID_MANAGER,
 164	TOMOYO_ID_CONDITION,
 165	TOMOYO_ID_NAME,
 166	TOMOYO_ID_ACL,
 167	TOMOYO_ID_DOMAIN,
 168	TOMOYO_MAX_POLICY
 169};
 170
 171/* Index numbers for domain's attributes. */
 172enum tomoyo_domain_info_flags_index {
 173	/* Quota warnning flag.   */
 174	TOMOYO_DIF_QUOTA_WARNED,
 175	/*
 176	 * This domain was unable to create a new domain at
 177	 * tomoyo_find_next_domain() because the name of the domain to be
 178	 * created was too long or it could not allocate memory.
 179	 * More than one process continued execve() without domain transition.
 180	 */
 181	TOMOYO_DIF_TRANSITION_FAILED,
 182	TOMOYO_MAX_DOMAIN_INFO_FLAGS
 183};
 184
 185/* Index numbers for audit type. */
 186enum tomoyo_grant_log {
 187	/* Follow profile's configuration. */
 188	TOMOYO_GRANTLOG_AUTO,
 189	/* Do not generate grant log. */
 190	TOMOYO_GRANTLOG_NO,
 191	/* Generate grant_log. */
 192	TOMOYO_GRANTLOG_YES,
 193};
 194
 195/* Index numbers for group entries. */
 196enum tomoyo_group_id {
 197	TOMOYO_PATH_GROUP,
 198	TOMOYO_NUMBER_GROUP,
 199	TOMOYO_ADDRESS_GROUP,
 200	TOMOYO_MAX_GROUP
 201};
 202
 203/* Index numbers for type of numeric values. */
 204enum tomoyo_value_type {
 205	TOMOYO_VALUE_TYPE_INVALID,
 206	TOMOYO_VALUE_TYPE_DECIMAL,
 207	TOMOYO_VALUE_TYPE_OCTAL,
 208	TOMOYO_VALUE_TYPE_HEXADECIMAL,
 209};
 210
 211/* Index numbers for domain transition control keywords. */
 212enum tomoyo_transition_type {
 213	/* Do not change this order, */
 214	TOMOYO_TRANSITION_CONTROL_NO_RESET,
 215	TOMOYO_TRANSITION_CONTROL_RESET,
 216	TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 217	TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 218	TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 219	TOMOYO_TRANSITION_CONTROL_KEEP,
 220	TOMOYO_MAX_TRANSITION_TYPE
 221};
 222
 223/* Index numbers for Access Controls. */
 224enum tomoyo_acl_entry_type_index {
 225	TOMOYO_TYPE_PATH_ACL,
 226	TOMOYO_TYPE_PATH2_ACL,
 227	TOMOYO_TYPE_PATH_NUMBER_ACL,
 228	TOMOYO_TYPE_MKDEV_ACL,
 229	TOMOYO_TYPE_MOUNT_ACL,
 230	TOMOYO_TYPE_INET_ACL,
 231	TOMOYO_TYPE_UNIX_ACL,
 232	TOMOYO_TYPE_ENV_ACL,
 233	TOMOYO_TYPE_MANUAL_TASK_ACL,
 234};
 235
 236/* Index numbers for access controls with one pathname. */
 237enum tomoyo_path_acl_index {
 238	TOMOYO_TYPE_EXECUTE,
 239	TOMOYO_TYPE_READ,
 240	TOMOYO_TYPE_WRITE,
 241	TOMOYO_TYPE_APPEND,
 242	TOMOYO_TYPE_UNLINK,
 243	TOMOYO_TYPE_GETATTR,
 244	TOMOYO_TYPE_RMDIR,
 245	TOMOYO_TYPE_TRUNCATE,
 246	TOMOYO_TYPE_SYMLINK,
 247	TOMOYO_TYPE_CHROOT,
 248	TOMOYO_TYPE_UMOUNT,
 249	TOMOYO_MAX_PATH_OPERATION
 250};
 251
 252/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 253enum tomoyo_memory_stat_type {
 254	TOMOYO_MEMORY_POLICY,
 255	TOMOYO_MEMORY_AUDIT,
 256	TOMOYO_MEMORY_QUERY,
 257	TOMOYO_MAX_MEMORY_STAT
 258};
 259
 260enum tomoyo_mkdev_acl_index {
 261	TOMOYO_TYPE_MKBLOCK,
 262	TOMOYO_TYPE_MKCHAR,
 263	TOMOYO_MAX_MKDEV_OPERATION
 264};
 265
 266/* Index numbers for socket operations. */
 267enum tomoyo_network_acl_index {
 268	TOMOYO_NETWORK_BIND,    /* bind() operation. */
 269	TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
 270	TOMOYO_NETWORK_CONNECT, /* connect() operation. */
 271	TOMOYO_NETWORK_SEND,    /* send() operation. */
 272	TOMOYO_MAX_NETWORK_OPERATION
 273};
 274
 275/* Index numbers for access controls with two pathnames. */
 276enum tomoyo_path2_acl_index {
 277	TOMOYO_TYPE_LINK,
 278	TOMOYO_TYPE_RENAME,
 279	TOMOYO_TYPE_PIVOT_ROOT,
 280	TOMOYO_MAX_PATH2_OPERATION
 281};
 282
 283/* Index numbers for access controls with one pathname and one number. */
 284enum tomoyo_path_number_acl_index {
 285	TOMOYO_TYPE_CREATE,
 286	TOMOYO_TYPE_MKDIR,
 287	TOMOYO_TYPE_MKFIFO,
 288	TOMOYO_TYPE_MKSOCK,
 289	TOMOYO_TYPE_IOCTL,
 290	TOMOYO_TYPE_CHMOD,
 291	TOMOYO_TYPE_CHOWN,
 292	TOMOYO_TYPE_CHGRP,
 293	TOMOYO_MAX_PATH_NUMBER_OPERATION
 294};
 295
 296/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 297enum tomoyo_securityfs_interface_index {
 298	TOMOYO_DOMAINPOLICY,
 299	TOMOYO_EXCEPTIONPOLICY,
 300	TOMOYO_PROCESS_STATUS,
 301	TOMOYO_STAT,
 302	TOMOYO_AUDIT,
 303	TOMOYO_VERSION,
 304	TOMOYO_PROFILE,
 305	TOMOYO_QUERY,
 306	TOMOYO_MANAGER
 307};
 308
 309/* Index numbers for special mount operations. */
 310enum tomoyo_special_mount {
 311	TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 312	TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 313	TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 314	TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 315	TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 316	TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 317	TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 318	TOMOYO_MAX_SPECIAL_MOUNT
 319};
 320
 321/* Index numbers for functionality. */
 322enum tomoyo_mac_index {
 323	TOMOYO_MAC_FILE_EXECUTE,
 324	TOMOYO_MAC_FILE_OPEN,
 325	TOMOYO_MAC_FILE_CREATE,
 326	TOMOYO_MAC_FILE_UNLINK,
 327	TOMOYO_MAC_FILE_GETATTR,
 328	TOMOYO_MAC_FILE_MKDIR,
 329	TOMOYO_MAC_FILE_RMDIR,
 330	TOMOYO_MAC_FILE_MKFIFO,
 331	TOMOYO_MAC_FILE_MKSOCK,
 332	TOMOYO_MAC_FILE_TRUNCATE,
 333	TOMOYO_MAC_FILE_SYMLINK,
 334	TOMOYO_MAC_FILE_MKBLOCK,
 335	TOMOYO_MAC_FILE_MKCHAR,
 336	TOMOYO_MAC_FILE_LINK,
 337	TOMOYO_MAC_FILE_RENAME,
 338	TOMOYO_MAC_FILE_CHMOD,
 339	TOMOYO_MAC_FILE_CHOWN,
 340	TOMOYO_MAC_FILE_CHGRP,
 341	TOMOYO_MAC_FILE_IOCTL,
 342	TOMOYO_MAC_FILE_CHROOT,
 343	TOMOYO_MAC_FILE_MOUNT,
 344	TOMOYO_MAC_FILE_UMOUNT,
 345	TOMOYO_MAC_FILE_PIVOT_ROOT,
 346	TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
 347	TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
 348	TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
 349	TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
 350	TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
 351	TOMOYO_MAC_NETWORK_INET_RAW_BIND,
 352	TOMOYO_MAC_NETWORK_INET_RAW_SEND,
 353	TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
 354	TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
 355	TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
 356	TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
 357	TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
 358	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
 359	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
 360	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 361	TOMOYO_MAC_ENVIRON,
 362	TOMOYO_MAX_MAC_INDEX
 363};
 364
 365/* Index numbers for category of functionality. */
 366enum tomoyo_mac_category_index {
 367	TOMOYO_MAC_CATEGORY_FILE,
 368	TOMOYO_MAC_CATEGORY_NETWORK,
 369	TOMOYO_MAC_CATEGORY_MISC,
 370	TOMOYO_MAX_MAC_CATEGORY_INDEX
 371};
 372
 373/*
 374 * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 375 * occurred in enforcing mode and the userspace daemon decided to retry.
 376 *
 377 * We must choose a positive value in order to distinguish "granted" (which is
 378 * 0) and "rejected" (which is a negative value) and "retry".
 379 */
 380#define TOMOYO_RETRY_REQUEST 1
 381
 382/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 383enum tomoyo_policy_stat_type {
 384	/* Do not change this order. */
 385	TOMOYO_STAT_POLICY_UPDATES,
 386	TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 387	TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 388	TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 389	TOMOYO_MAX_POLICY_STAT
 390};
 391
 392/* Index numbers for profile's PREFERENCE values. */
 393enum tomoyo_pref_index {
 394	TOMOYO_PREF_MAX_AUDIT_LOG,
 395	TOMOYO_PREF_MAX_LEARNING_ENTRY,
 396	TOMOYO_MAX_PREF
 397};
 398
 399/********** Structure definitions. **********/
 400
 401/* Common header for holding ACL entries. */
 402struct tomoyo_acl_head {
 403	struct list_head list;
 404	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 405} __packed;
 406
 407/* Common header for shared entries. */
 408struct tomoyo_shared_acl_head {
 409	struct list_head list;
 410	atomic_t users;
 411} __packed;
 412
 413struct tomoyo_policy_namespace;
 414
 415/* Structure for request info. */
 416struct tomoyo_request_info {
 417	/*
 418	 * For holding parameters specific to operations which deal files.
 419	 * NULL if not dealing files.
 420	 */
 421	struct tomoyo_obj_info *obj;
 422	/*
 423	 * For holding parameters specific to execve() request.
 424	 * NULL if not dealing do_execve().
 425	 */
 426	struct tomoyo_execve *ee;
 427	struct tomoyo_domain_info *domain;
 428	/* For holding parameters. */
 429	union {
 430		struct {
 431			const struct tomoyo_path_info *filename;
 432			/* For using wildcards at tomoyo_find_next_domain(). */
 433			const struct tomoyo_path_info *matched_path;
 434			/* One of values in "enum tomoyo_path_acl_index". */
 435			u8 operation;
 436		} path;
 437		struct {
 438			const struct tomoyo_path_info *filename1;
 439			const struct tomoyo_path_info *filename2;
 440			/* One of values in "enum tomoyo_path2_acl_index". */
 441			u8 operation;
 442		} path2;
 443		struct {
 444			const struct tomoyo_path_info *filename;
 445			unsigned int mode;
 446			unsigned int major;
 447			unsigned int minor;
 448			/* One of values in "enum tomoyo_mkdev_acl_index". */
 449			u8 operation;
 450		} mkdev;
 451		struct {
 452			const struct tomoyo_path_info *filename;
 453			unsigned long number;
 454			/*
 455			 * One of values in
 456			 * "enum tomoyo_path_number_acl_index".
 457			 */
 458			u8 operation;
 459		} path_number;
 460		struct {
 461			const struct tomoyo_path_info *name;
 462		} environ;
 463		struct {
 464			const __be32 *address;
 465			u16 port;
 466			/* One of values smaller than TOMOYO_SOCK_MAX. */
 467			u8 protocol;
 468			/* One of values in "enum tomoyo_network_acl_index". */
 469			u8 operation;
 470			bool is_ipv6;
 471		} inet_network;
 472		struct {
 473			const struct tomoyo_path_info *address;
 474			/* One of values smaller than TOMOYO_SOCK_MAX. */
 475			u8 protocol;
 476			/* One of values in "enum tomoyo_network_acl_index". */
 477			u8 operation;
 478		} unix_network;
 479		struct {
 480			const struct tomoyo_path_info *type;
 481			const struct tomoyo_path_info *dir;
 482			const struct tomoyo_path_info *dev;
 483			unsigned long flags;
 484			int need_dev;
 485		} mount;
 486		struct {
 487			const struct tomoyo_path_info *domainname;
 488		} task;
 489	} param;
 490	struct tomoyo_acl_info *matched_acl;
 491	u8 param_type;
 492	bool granted;
 493	u8 retry;
 494	u8 profile;
 495	u8 mode; /* One of tomoyo_mode_index . */
 496	u8 type;
 497};
 498
 499/* Structure for holding a token. */
 500struct tomoyo_path_info {
 501	const char *name;
 502	u32 hash;          /* = full_name_hash(name, strlen(name)) */
 503	u16 const_len;     /* = tomoyo_const_part_length(name)     */
 504	bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 505	bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 506};
 507
 508/* Structure for holding string data. */
 509struct tomoyo_name {
 510	struct tomoyo_shared_acl_head head;
 511	struct tomoyo_path_info entry;
 512};
 513
 514/* Structure for holding a word. */
 515struct tomoyo_name_union {
 516	/* Either @filename or @group is NULL. */
 517	const struct tomoyo_path_info *filename;
 518	struct tomoyo_group *group;
 519};
 520
 521/* Structure for holding a number. */
 522struct tomoyo_number_union {
 523	unsigned long values[2];
 524	struct tomoyo_group *group; /* Maybe NULL. */
 525	/* One of values in "enum tomoyo_value_type". */
 526	u8 value_type[2];
 527};
 528
 529/* Structure for holding an IP address. */
 530struct tomoyo_ipaddr_union {
 531	struct in6_addr ip[2]; /* Big endian. */
 532	struct tomoyo_group *group; /* Pointer to address group. */
 533	bool is_ipv6; /* Valid only if @group == NULL. */
 534};
 535
 536/* Structure for "path_group"/"number_group"/"address_group" directive. */
 537struct tomoyo_group {
 538	struct tomoyo_shared_acl_head head;
 539	const struct tomoyo_path_info *group_name;
 540	struct list_head member_list;
 541};
 542
 543/* Structure for "path_group" directive. */
 544struct tomoyo_path_group {
 545	struct tomoyo_acl_head head;
 546	const struct tomoyo_path_info *member_name;
 547};
 548
 549/* Structure for "number_group" directive. */
 550struct tomoyo_number_group {
 551	struct tomoyo_acl_head head;
 552	struct tomoyo_number_union number;
 553};
 554
 555/* Structure for "address_group" directive. */
 556struct tomoyo_address_group {
 557	struct tomoyo_acl_head head;
 558	/* Structure for holding an IP address. */
 559	struct tomoyo_ipaddr_union address;
 560};
 561
 562/* Subset of "struct stat". Used by conditional ACL and audit logs. */
 563struct tomoyo_mini_stat {
 564	kuid_t uid;
 565	kgid_t gid;
 566	ino_t ino;
 567	umode_t mode;
 568	dev_t dev;
 569	dev_t rdev;
 570};
 571
 572/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
 573struct tomoyo_page_dump {
 574	struct page *page;    /* Previously dumped page. */
 575	char *data;           /* Contents of "page". Size is PAGE_SIZE. */
 576};
 577
 578/* Structure for attribute checks in addition to pathname checks. */
 579struct tomoyo_obj_info {
 580	/*
 581	 * True if tomoyo_get_attributes() was already called, false otherwise.
 582	 */
 583	bool validate_done;
 584	/* True if @stat[] is valid. */
 585	bool stat_valid[TOMOYO_MAX_PATH_STAT];
 586	/* First pathname. Initialized with { NULL, NULL } if no path. */
 587	struct path path1;
 588	/* Second pathname. Initialized with { NULL, NULL } if no path. */
 589	struct path path2;
 590	/*
 591	 * Information on @path1, @path1's parent directory, @path2, @path2's
 592	 * parent directory.
 593	 */
 594	struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
 595	/*
 596	 * Content of symbolic link to be created. NULL for operations other
 597	 * than symlink().
 598	 */
 599	struct tomoyo_path_info *symlink_target;
 600};
 601
 602/* Structure for argv[]. */
 603struct tomoyo_argv {
 604	unsigned long index;
 605	const struct tomoyo_path_info *value;
 606	bool is_not;
 607};
 608
 609/* Structure for envp[]. */
 610struct tomoyo_envp {
 611	const struct tomoyo_path_info *name;
 612	const struct tomoyo_path_info *value;
 613	bool is_not;
 614};
 615
 616/* Structure for execve() operation. */
 617struct tomoyo_execve {
 618	struct tomoyo_request_info r;
 619	struct tomoyo_obj_info obj;
 620	struct linux_binprm *bprm;
 621	const struct tomoyo_path_info *transition;
 622	/* For dumping argv[] and envp[]. */
 623	struct tomoyo_page_dump dump;
 624	/* For temporary use. */
 625	char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
 626};
 627
 628/* Structure for entries which follows "struct tomoyo_condition". */
 629struct tomoyo_condition_element {
 630	/*
 631	 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
 632	 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
 633	 * of the array of this struct.
 634	 */
 635	u8 left;
 636	/*
 637	 * Right hand operand. A "struct tomoyo_number_union" for
 638	 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
 639	 * TOMOYO_NAME_UNION is attached to the tail of the array of this
 640	 * struct.
 641	 */
 642	u8 right;
 643	/* Equation operator. True if equals or overlaps, false otherwise. */
 644	bool equals;
 645};
 646
 647/* Structure for optional arguments. */
 648struct tomoyo_condition {
 649	struct tomoyo_shared_acl_head head;
 650	u32 size; /* Memory size allocated for this entry. */
 651	u16 condc; /* Number of conditions in this struct. */
 652	u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 653	u16 names_count; /* Number of "struct tomoyo_name_union names". */
 654	u16 argc; /* Number of "struct tomoyo_argv". */
 655	u16 envc; /* Number of "struct tomoyo_envp". */
 656	u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
 657	const struct tomoyo_path_info *transit; /* Maybe NULL. */
 658	/*
 659	 * struct tomoyo_condition_element condition[condc];
 660	 * struct tomoyo_number_union values[numbers_count];
 661	 * struct tomoyo_name_union names[names_count];
 662	 * struct tomoyo_argv argv[argc];
 663	 * struct tomoyo_envp envp[envc];
 664	 */
 665};
 666
 667/* Common header for individual entries. */
 668struct tomoyo_acl_info {
 669	struct list_head list;
 670	struct tomoyo_condition *cond; /* Maybe NULL. */
 671	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 672	u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 673} __packed;
 674
 675/* Structure for domain information. */
 676struct tomoyo_domain_info {
 677	struct list_head list;
 678	struct list_head acl_info_list;
 679	/* Name of this domain. Never NULL.          */
 680	const struct tomoyo_path_info *domainname;
 681	/* Namespace for this domain. Never NULL. */
 682	struct tomoyo_policy_namespace *ns;
 683	u8 profile;        /* Profile number to use. */
 684	u8 group;          /* Group number to use.   */
 685	bool is_deleted;   /* Delete flag.           */
 686	bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 687	atomic_t users; /* Number of referring credentials. */
 688};
 689
 690/*
 691 * Structure for "task manual_domain_transition" directive.
 692 */
 693struct tomoyo_task_acl {
 694	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
 695	/* Pointer to domainname. */
 696	const struct tomoyo_path_info *domainname;
 697};
 698
 699/*
 700 * Structure for "file execute", "file read", "file write", "file append",
 701 * "file unlink", "file getattr", "file rmdir", "file truncate",
 702 * "file symlink", "file chroot" and "file unmount" directive.
 703 */
 704struct tomoyo_path_acl {
 705	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 706	u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 707	struct tomoyo_name_union name;
 708};
 709
 710/*
 711 * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 712 * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 713 */
 714struct tomoyo_path_number_acl {
 715	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 716	/* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 717	u8 perm;
 718	struct tomoyo_name_union name;
 719	struct tomoyo_number_union number;
 720};
 721
 722/* Structure for "file mkblock" and "file mkchar" directive. */
 723struct tomoyo_mkdev_acl {
 724	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 725	u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 726	struct tomoyo_name_union name;
 727	struct tomoyo_number_union mode;
 728	struct tomoyo_number_union major;
 729	struct tomoyo_number_union minor;
 730};
 731
 732/*
 733 * Structure for "file rename", "file link" and "file pivot_root" directive.
 734 */
 735struct tomoyo_path2_acl {
 736	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 737	u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 738	struct tomoyo_name_union name1;
 739	struct tomoyo_name_union name2;
 740};
 741
 742/* Structure for "file mount" directive. */
 743struct tomoyo_mount_acl {
 744	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 745	struct tomoyo_name_union dev_name;
 746	struct tomoyo_name_union dir_name;
 747	struct tomoyo_name_union fs_type;
 748	struct tomoyo_number_union flags;
 749};
 750
 751/* Structure for "misc env" directive in domain policy. */
 752struct tomoyo_env_acl {
 753	struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
 754	const struct tomoyo_path_info *env; /* environment variable */
 755};
 756
 757/* Structure for "network inet" directive. */
 758struct tomoyo_inet_acl {
 759	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
 760	u8 protocol;
 761	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 762	struct tomoyo_ipaddr_union address;
 763	struct tomoyo_number_union port;
 764};
 765
 766/* Structure for "network unix" directive. */
 767struct tomoyo_unix_acl {
 768	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
 769	u8 protocol;
 770	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 771	struct tomoyo_name_union name;
 772};
 773
 774/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 775struct tomoyo_acl_param {
 776	char *data;
 777	struct list_head *list;
 778	struct tomoyo_policy_namespace *ns;
 779	bool is_delete;
 780};
 781
 782#define TOMOYO_MAX_IO_READ_QUEUE 64
 783
 784/*
 785 * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 786 * interfaces.
 787 */
 788struct tomoyo_io_buffer {
 789	void (*read) (struct tomoyo_io_buffer *);
 790	int (*write) (struct tomoyo_io_buffer *);
 791	unsigned int (*poll) (struct file *file, poll_table *wait);
 792	/* Exclusive lock for this structure.   */
 793	struct mutex io_sem;
 794	char __user *read_user_buf;
 795	size_t read_user_buf_avail;
 796	struct {
 797		struct list_head *ns;
 798		struct list_head *domain;
 799		struct list_head *group;
 800		struct list_head *acl;
 801		size_t avail;
 802		unsigned int step;
 803		unsigned int query_index;
 804		u16 index;
 805		u16 cond_index;
 806		u8 acl_group_index;
 807		u8 cond_step;
 808		u8 bit;
 809		u8 w_pos;
 810		bool eof;
 811		bool print_this_domain_only;
 812		bool print_transition_related_only;
 813		bool print_cond_part;
 814		const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 815	} r;
 816	struct {
 817		struct tomoyo_policy_namespace *ns;
 818		/* The position currently writing to.   */
 819		struct tomoyo_domain_info *domain;
 820		/* Bytes available for writing.         */
 821		size_t avail;
 822		bool is_delete;
 823	} w;
 824	/* Buffer for reading.                  */
 825	char *read_buf;
 826	/* Size of read buffer.                 */
 827	size_t readbuf_size;
 828	/* Buffer for writing.                  */
 829	char *write_buf;
 830	/* Size of write buffer.                */
 831	size_t writebuf_size;
 832	/* Type of this interface.              */
 833	enum tomoyo_securityfs_interface_index type;
 834	/* Users counter protected by tomoyo_io_buffer_list_lock. */
 835	u8 users;
 836	/* List for telling GC not to kfree() elements. */
 837	struct list_head list;
 838};
 839
 840/*
 841 * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 842 * "no_keep_domain" keyword.
 843 */
 844struct tomoyo_transition_control {
 845	struct tomoyo_acl_head head;
 846	u8 type; /* One of values in "enum tomoyo_transition_type".  */
 847	/* True if the domainname is tomoyo_get_last_name(). */
 848	bool is_last_name;
 849	const struct tomoyo_path_info *domainname; /* Maybe NULL */
 850	const struct tomoyo_path_info *program;    /* Maybe NULL */
 851};
 852
 853/* Structure for "aggregator" keyword. */
 854struct tomoyo_aggregator {
 855	struct tomoyo_acl_head head;
 856	const struct tomoyo_path_info *original_name;
 857	const struct tomoyo_path_info *aggregated_name;
 858};
 859
 860/* Structure for policy manager. */
 861struct tomoyo_manager {
 862	struct tomoyo_acl_head head;
 863	/* A path to program or a domainname. */
 864	const struct tomoyo_path_info *manager;
 865};
 866
 867struct tomoyo_preference {
 868	unsigned int learning_max_entry;
 869	bool enforcing_verbose;
 870	bool learning_verbose;
 871	bool permissive_verbose;
 872};
 873
 874/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 875struct tomoyo_profile {
 876	const struct tomoyo_path_info *comment;
 877	struct tomoyo_preference *learning;
 878	struct tomoyo_preference *permissive;
 879	struct tomoyo_preference *enforcing;
 880	struct tomoyo_preference preference;
 881	u8 default_config;
 882	u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 883	unsigned int pref[TOMOYO_MAX_PREF];
 884};
 885
 886/* Structure for representing YYYY/MM/DD hh/mm/ss. */
 887struct tomoyo_time {
 888	u16 year;
 889	u8 month;
 890	u8 day;
 891	u8 hour;
 892	u8 min;
 893	u8 sec;
 894};
 895
 896/* Structure for policy namespace. */
 897struct tomoyo_policy_namespace {
 898	/* Profile table. Memory is allocated as needed. */
 899	struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 900	/* List of "struct tomoyo_group". */
 901	struct list_head group_list[TOMOYO_MAX_GROUP];
 902	/* List of policy. */
 903	struct list_head policy_list[TOMOYO_MAX_POLICY];
 904	/* The global ACL referred by "use_group" keyword. */
 905	struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 906	/* List for connecting to tomoyo_namespace_list list. */
 907	struct list_head namespace_list;
 908	/* Profile version. Currently only 20110903 is defined. */
 909	unsigned int profile_version;
 910	/* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 911	const char *name;
 912};
 913
 914/********** Function prototypes. **********/
 915
 916bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
 917				  const struct tomoyo_group *group);
 918bool tomoyo_compare_number_union(const unsigned long value,
 919				 const struct tomoyo_number_union *ptr);
 920bool tomoyo_condition(struct tomoyo_request_info *r,
 921		      const struct tomoyo_condition *cond);
 922bool tomoyo_correct_domain(const unsigned char *domainname);
 923bool tomoyo_correct_path(const char *filename);
 924bool tomoyo_correct_word(const char *string);
 925bool tomoyo_domain_def(const unsigned char *buffer);
 926bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 927bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
 928		      struct tomoyo_page_dump *dump);
 929bool tomoyo_memory_ok(void *ptr);
 930bool tomoyo_number_matches_group(const unsigned long min,
 931				 const unsigned long max,
 932				 const struct tomoyo_group *group);
 933bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
 934			       struct tomoyo_ipaddr_union *ptr);
 935bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 936			     struct tomoyo_name_union *ptr);
 937bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 938			       struct tomoyo_number_union *ptr);
 939bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 940				 const struct tomoyo_path_info *pattern);
 941bool tomoyo_permstr(const char *string, const char *keyword);
 942bool tomoyo_str_starts(char **src, const char *find);
 943char *tomoyo_encode(const char *str);
 944char *tomoyo_encode2(const char *str, int str_len);
 945char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 946		      va_list args);
 947char *tomoyo_read_token(struct tomoyo_acl_param *param);
 948char *tomoyo_realpath_from_path(const struct path *path);
 949char *tomoyo_realpath_nofollow(const char *pathname);
 950const char *tomoyo_get_exe(void);
 951const char *tomoyo_yesno(const unsigned int value);
 952const struct tomoyo_path_info *tomoyo_compare_name_union
 953(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 954const struct tomoyo_path_info *tomoyo_get_domainname
 955(struct tomoyo_acl_param *param);
 956const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 957const struct tomoyo_path_info *tomoyo_path_matches_group
 958(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 959int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 960				 struct path *path, const int flag);
 961void tomoyo_close_control(struct tomoyo_io_buffer *head);
 962int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 963int tomoyo_execute_permission(struct tomoyo_request_info *r,
 964			      const struct tomoyo_path_info *filename);
 965int tomoyo_find_next_domain(struct linux_binprm *bprm);
 966int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 967		    const u8 index);
 968int tomoyo_init_request_info(struct tomoyo_request_info *r,
 969			     struct tomoyo_domain_info *domain,
 970			     const u8 index);
 971int tomoyo_mkdev_perm(const u8 operation, struct path *path,
 972		      const unsigned int mode, unsigned int dev);
 973int tomoyo_mount_permission(const char *dev_name, struct path *path,
 974			    const char *type, unsigned long flags,
 975			    void *data_page);
 976int tomoyo_open_control(const u8 type, struct file *file);
 977int tomoyo_path2_perm(const u8 operation, struct path *path1,
 978		      struct path *path2);
 979int tomoyo_path_number_perm(const u8 operation, struct path *path,
 980			    unsigned long number);
 981int tomoyo_path_perm(const u8 operation, const struct path *path,
 982		     const char *target);
 983unsigned int tomoyo_poll_control(struct file *file, poll_table *wait);
 984unsigned int tomoyo_poll_log(struct file *file, poll_table *wait);
 985int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
 986				  int addr_len);
 987int tomoyo_socket_connect_permission(struct socket *sock,
 988				     struct sockaddr *addr, int addr_len);
 989int tomoyo_socket_listen_permission(struct socket *sock);
 990int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
 991				     int size);
 992int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 993	__printf(2, 3);
 994int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
 995			 struct tomoyo_acl_param *param,
 996			 bool (*check_duplicate)
 997			 (const struct tomoyo_acl_info *,
 998			  const struct tomoyo_acl_info *),
 999			 bool (*merge_duplicate)
1000			 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1001			  const bool));
1002int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1003			 struct tomoyo_acl_param *param,
1004			 bool (*check_duplicate)
1005			 (const struct tomoyo_acl_head *,
1006			  const struct tomoyo_acl_head *));
1007int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1008int tomoyo_write_file(struct tomoyo_acl_param *param);
1009int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1010int tomoyo_write_misc(struct tomoyo_acl_param *param);
1011int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1012int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1013				    const u8 type);
1014int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1015ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1016			    const int buffer_len);
1017ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1018			     const char __user *buffer, const int buffer_len);
1019struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1020struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1021						const bool transit);
1022struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1023struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1024				      const u8 idx);
1025struct tomoyo_policy_namespace *tomoyo_assign_namespace
1026(const char *domainname);
1027struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1028				      const u8 profile);
1029unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1030				const u8 index);
1031u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1032void *tomoyo_commit_ok(void *data, const unsigned int size);
1033void __init tomoyo_load_builtin_policy(void);
1034void __init tomoyo_mm_init(void);
1035void tomoyo_check_acl(struct tomoyo_request_info *r,
1036		      bool (*check_entry) (struct tomoyo_request_info *,
1037					   const struct tomoyo_acl_info *));
1038void tomoyo_check_profile(void);
1039void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
1040void tomoyo_del_condition(struct list_head *element);
1041void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1042void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1043void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1044void tomoyo_load_policy(const char *filename);
1045void tomoyo_normalize_line(unsigned char *buffer);
1046void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1047void tomoyo_print_ip(char *buf, const unsigned int size,
1048		     const struct tomoyo_ipaddr_union *ptr);
1049void tomoyo_print_ulong(char *buffer, const int buffer_len,
1050			const unsigned long value, const u8 type);
1051void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1052void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1053void tomoyo_read_log(struct tomoyo_io_buffer *head);
1054void tomoyo_update_stat(const u8 index);
1055void tomoyo_warn_oom(const char *function);
1056void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1057	__printf(2, 3);
1058void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1059		       va_list args);
1060
1061/********** External variable definitions. **********/
1062
1063extern bool tomoyo_policy_loaded;
1064extern const char * const tomoyo_condition_keyword
1065[TOMOYO_MAX_CONDITION_KEYWORD];
1066extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1067extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1068					      + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1069extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1070extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1071extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1072extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1073extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1074extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1075extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1076extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1077extern struct list_head tomoyo_condition_list;
1078extern struct list_head tomoyo_domain_list;
1079extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1080extern struct list_head tomoyo_namespace_list;
1081extern struct mutex tomoyo_policy_lock;
1082extern struct srcu_struct tomoyo_ss;
1083extern struct tomoyo_domain_info tomoyo_kernel_domain;
1084extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1085extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1086extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1087
1088/********** Inlined functions. **********/
1089
1090/**
1091 * tomoyo_read_lock - Take lock for protecting policy.
1092 *
1093 * Returns index number for tomoyo_read_unlock().
1094 */
1095static inline int tomoyo_read_lock(void)
1096{
1097	return srcu_read_lock(&tomoyo_ss);
1098}
1099
1100/**
1101 * tomoyo_read_unlock - Release lock for protecting policy.
1102 *
1103 * @idx: Index number returned by tomoyo_read_lock().
1104 *
1105 * Returns nothing.
1106 */
1107static inline void tomoyo_read_unlock(int idx)
1108{
1109	srcu_read_unlock(&tomoyo_ss, idx);
1110}
1111
1112/**
1113 * tomoyo_sys_getppid - Copy of getppid().
1114 *
1115 * Returns parent process's PID.
1116 *
1117 * Alpha does not have getppid() defined. To be able to build this module on
1118 * Alpha, I have to copy getppid() from kernel/timer.c.
1119 */
1120static inline pid_t tomoyo_sys_getppid(void)
1121{
1122	pid_t pid;
1123	rcu_read_lock();
1124	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1125	rcu_read_unlock();
1126	return pid;
1127}
1128
1129/**
1130 * tomoyo_sys_getpid - Copy of getpid().
1131 *
1132 * Returns current thread's PID.
1133 *
1134 * Alpha does not have getpid() defined. To be able to build this module on
1135 * Alpha, I have to copy getpid() from kernel/timer.c.
1136 */
1137static inline pid_t tomoyo_sys_getpid(void)
1138{
1139	return task_tgid_vnr(current);
1140}
1141
1142/**
1143 * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1144 *
1145 * @a: Pointer to "struct tomoyo_path_info".
1146 * @b: Pointer to "struct tomoyo_path_info".
1147 *
1148 * Returns true if @a == @b, false otherwise.
1149 */
1150static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1151				  const struct tomoyo_path_info *b)
1152{
1153	return a->hash != b->hash || strcmp(a->name, b->name);
1154}
1155
1156/**
1157 * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1158 *
1159 * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1160 *
1161 * Returns nothing.
1162 */
1163static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1164{
1165	if (name) {
1166		struct tomoyo_name *ptr =
1167			container_of(name, typeof(*ptr), entry);
1168		atomic_dec(&ptr->head.users);
1169	}
1170}
1171
1172/**
1173 * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1174 *
1175 * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1176 *
1177 * Returns nothing.
1178 */
1179static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1180{
1181	if (cond)
1182		atomic_dec(&cond->head.users);
1183}
1184
1185/**
1186 * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1187 *
1188 * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1189 *
1190 * Returns nothing.
1191 */
1192static inline void tomoyo_put_group(struct tomoyo_group *group)
1193{
1194	if (group)
1195		atomic_dec(&group->head.users);
1196}
1197
1198/**
1199 * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1200 *
1201 * Returns pointer to "struct tomoyo_domain_info" for current thread.
1202 */
1203static inline struct tomoyo_domain_info *tomoyo_domain(void)
1204{
1205	return current_cred()->security;
1206}
1207
1208/**
1209 * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1210 *
1211 * @task: Pointer to "struct task_struct".
1212 *
1213 * Returns pointer to "struct tomoyo_security" for specified thread.
1214 */
1215static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1216							    *task)
1217{
1218	return task_cred_xxx(task, security);
1219}
1220
1221/**
1222 * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1223 *
1224 * @a: Pointer to "struct tomoyo_name_union".
1225 * @b: Pointer to "struct tomoyo_name_union".
1226 *
1227 * Returns true if @a == @b, false otherwise.
1228 */
1229static inline bool tomoyo_same_name_union
1230(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1231{
1232	return a->filename == b->filename && a->group == b->group;
1233}
1234
1235/**
1236 * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1237 *
1238 * @a: Pointer to "struct tomoyo_number_union".
1239 * @b: Pointer to "struct tomoyo_number_union".
1240 *
1241 * Returns true if @a == @b, false otherwise.
1242 */
1243static inline bool tomoyo_same_number_union
1244(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1245{
1246	return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1247		a->group == b->group && a->value_type[0] == b->value_type[0] &&
1248		a->value_type[1] == b->value_type[1];
1249}
1250
1251/**
1252 * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1253 *
1254 * @a: Pointer to "struct tomoyo_ipaddr_union".
1255 * @b: Pointer to "struct tomoyo_ipaddr_union".
1256 *
1257 * Returns true if @a == @b, false otherwise.
1258 */
1259static inline bool tomoyo_same_ipaddr_union
1260(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1261{
1262	return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1263		a->is_ipv6 == b->is_ipv6;
1264}
1265
1266/**
1267 * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1268 *
1269 * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1270 */
1271static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1272{
1273	return tomoyo_domain()->ns;
1274}
1275
1276#if defined(CONFIG_SLOB)
1277
1278/**
1279 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1280 *
1281 * @size: Size to be rounded up.
1282 *
1283 * Returns @size.
1284 *
1285 * Since SLOB does not round up, this function simply returns @size.
1286 */
1287static inline int tomoyo_round2(size_t size)
1288{
1289	return size;
1290}
1291
1292#else
1293
1294/**
1295 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1296 *
1297 * @size: Size to be rounded up.
1298 *
1299 * Returns rounded size.
1300 *
1301 * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1302 * (e.g.) 128 bytes.
1303 */
1304static inline int tomoyo_round2(size_t size)
1305{
1306#if PAGE_SIZE == 4096
1307	size_t bsize = 32;
1308#else
1309	size_t bsize = 64;
1310#endif
1311	if (!size)
1312		return 0;
1313	while (size > bsize)
1314		bsize <<= 1;
1315	return bsize;
1316}
1317
1318#endif
1319
1320/**
1321 * list_for_each_cookie - iterate over a list with cookie.
1322 * @pos:        the &struct list_head to use as a loop cursor.
1323 * @head:       the head for your list.
1324 */
1325#define list_for_each_cookie(pos, head)					\
1326	if (!pos)							\
1327		pos =  srcu_dereference((head)->next, &tomoyo_ss);	\
1328	for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1329
1330#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */