1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * security/tomoyo/common.h
   4 *
   5 * Header file for TOMOYO.
   6 *
   7 * Copyright (C) 2005-2011  NTT DATA CORPORATION
   8 */
   9
  10#ifndef _SECURITY_TOMOYO_COMMON_H
  11#define _SECURITY_TOMOYO_COMMON_H
  12
  13#define pr_fmt(fmt) fmt
  14
  15#include <linux/ctype.h>
  16#include <linux/string.h>
  17#include <linux/mm.h>
  18#include <linux/file.h>
  19#include <linux/kmod.h>
  20#include <linux/fs.h>
  21#include <linux/sched.h>
  22#include <linux/namei.h>
  23#include <linux/mount.h>
  24#include <linux/list.h>
  25#include <linux/cred.h>
  26#include <linux/poll.h>
  27#include <linux/binfmts.h>
  28#include <linux/highmem.h>
  29#include <linux/net.h>
  30#include <linux/inet.h>
  31#include <linux/in.h>
  32#include <linux/in6.h>
  33#include <linux/un.h>
  34#include <linux/lsm_hooks.h>
  35#include <net/sock.h>
  36#include <net/af_unix.h>
  37#include <net/ip.h>
  38#include <net/ipv6.h>
  39#include <net/udp.h>
  40
  41/********** Constants definitions. **********/
  42
  43/*
  44 * TOMOYO uses this hash only when appending a string into the string
  45 * table. Frequency of appending strings is very low. So we don't need
  46 * large (e.g. 64k) hash size. 256 will be sufficient.
  47 */
  48#define TOMOYO_HASH_BITS  8
  49#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
  50
  51/*
  52 * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
  53 * Therefore, we don't need SOCK_MAX.
  54 */
  55#define TOMOYO_SOCK_MAX 6
  56
  57#define TOMOYO_EXEC_TMPSIZE     4096
  58
  59/* Garbage collector is trying to kfree() this element. */
  60#define TOMOYO_GC_IN_PROGRESS -1
  61
  62/* Profile number is an integer between 0 and 255. */
  63#define TOMOYO_MAX_PROFILES 256
  64
  65/* Group number is an integer between 0 and 255. */
  66#define TOMOYO_MAX_ACL_GROUPS 256
  67
  68/* Index numbers for "struct tomoyo_condition". */
  69enum tomoyo_conditions_index {
  70	TOMOYO_TASK_UID,             /* current_uid()   */
  71	TOMOYO_TASK_EUID,            /* current_euid()  */
  72	TOMOYO_TASK_SUID,            /* current_suid()  */
  73	TOMOYO_TASK_FSUID,           /* current_fsuid() */
  74	TOMOYO_TASK_GID,             /* current_gid()   */
  75	TOMOYO_TASK_EGID,            /* current_egid()  */
  76	TOMOYO_TASK_SGID,            /* current_sgid()  */
  77	TOMOYO_TASK_FSGID,           /* current_fsgid() */
  78	TOMOYO_TASK_PID,             /* sys_getpid()   */
  79	TOMOYO_TASK_PPID,            /* sys_getppid()  */
  80	TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
  81	TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
  82	TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
  83	TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
  84	TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
  85	TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
  86	TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
  87	TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
  88	TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
  89	TOMOYO_MODE_SETUID,          /* S_ISUID */
  90	TOMOYO_MODE_SETGID,          /* S_ISGID */
  91	TOMOYO_MODE_STICKY,          /* S_ISVTX */
  92	TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
  93	TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
  94	TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
  95	TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
  96	TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
  97	TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
  98	TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
  99	TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
 100	TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
 101	TOMOYO_EXEC_REALPATH,
 102	TOMOYO_SYMLINK_TARGET,
 103	TOMOYO_PATH1_UID,
 104	TOMOYO_PATH1_GID,
 105	TOMOYO_PATH1_INO,
 106	TOMOYO_PATH1_MAJOR,
 107	TOMOYO_PATH1_MINOR,
 108	TOMOYO_PATH1_PERM,
 109	TOMOYO_PATH1_TYPE,
 110	TOMOYO_PATH1_DEV_MAJOR,
 111	TOMOYO_PATH1_DEV_MINOR,
 112	TOMOYO_PATH2_UID,
 113	TOMOYO_PATH2_GID,
 114	TOMOYO_PATH2_INO,
 115	TOMOYO_PATH2_MAJOR,
 116	TOMOYO_PATH2_MINOR,
 117	TOMOYO_PATH2_PERM,
 118	TOMOYO_PATH2_TYPE,
 119	TOMOYO_PATH2_DEV_MAJOR,
 120	TOMOYO_PATH2_DEV_MINOR,
 121	TOMOYO_PATH1_PARENT_UID,
 122	TOMOYO_PATH1_PARENT_GID,
 123	TOMOYO_PATH1_PARENT_INO,
 124	TOMOYO_PATH1_PARENT_PERM,
 125	TOMOYO_PATH2_PARENT_UID,
 126	TOMOYO_PATH2_PARENT_GID,
 127	TOMOYO_PATH2_PARENT_INO,
 128	TOMOYO_PATH2_PARENT_PERM,
 129	TOMOYO_MAX_CONDITION_KEYWORD,
 130	TOMOYO_NUMBER_UNION,
 131	TOMOYO_NAME_UNION,
 132	TOMOYO_ARGV_ENTRY,
 133	TOMOYO_ENVP_ENTRY,
 134};
 135
 136
 137/* Index numbers for stat(). */
 138enum tomoyo_path_stat_index {
 139	/* Do not change this order. */
 140	TOMOYO_PATH1,
 141	TOMOYO_PATH1_PARENT,
 142	TOMOYO_PATH2,
 143	TOMOYO_PATH2_PARENT,
 144	TOMOYO_MAX_PATH_STAT
 145};
 146
 147/* Index numbers for operation mode. */
 148enum tomoyo_mode_index {
 149	TOMOYO_CONFIG_DISABLED,
 150	TOMOYO_CONFIG_LEARNING,
 151	TOMOYO_CONFIG_PERMISSIVE,
 152	TOMOYO_CONFIG_ENFORCING,
 153	TOMOYO_CONFIG_MAX_MODE,
 154	TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
 155	TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
 156	TOMOYO_CONFIG_USE_DEFAULT     = 255,
 157};
 158
 159/* Index numbers for entry type. */
 160enum tomoyo_policy_id {
 161	TOMOYO_ID_GROUP,
 162	TOMOYO_ID_ADDRESS_GROUP,
 163	TOMOYO_ID_PATH_GROUP,
 164	TOMOYO_ID_NUMBER_GROUP,
 165	TOMOYO_ID_TRANSITION_CONTROL,
 166	TOMOYO_ID_AGGREGATOR,
 167	TOMOYO_ID_MANAGER,
 168	TOMOYO_ID_CONDITION,
 169	TOMOYO_ID_NAME,
 170	TOMOYO_ID_ACL,
 171	TOMOYO_ID_DOMAIN,
 172	TOMOYO_MAX_POLICY
 173};
 174
 175/* Index numbers for domain's attributes. */
 176enum tomoyo_domain_info_flags_index {
 177	/* Quota warnning flag.   */
 178	TOMOYO_DIF_QUOTA_WARNED,
 179	/*
 180	 * This domain was unable to create a new domain at
 181	 * tomoyo_find_next_domain() because the name of the domain to be
 182	 * created was too long or it could not allocate memory.
 183	 * More than one process continued execve() without domain transition.
 184	 */
 185	TOMOYO_DIF_TRANSITION_FAILED,
 186	TOMOYO_MAX_DOMAIN_INFO_FLAGS
 187};
 188
 189/* Index numbers for audit type. */
 190enum tomoyo_grant_log {
 191	/* Follow profile's configuration. */
 192	TOMOYO_GRANTLOG_AUTO,
 193	/* Do not generate grant log. */
 194	TOMOYO_GRANTLOG_NO,
 195	/* Generate grant_log. */
 196	TOMOYO_GRANTLOG_YES,
 197};
 198
 199/* Index numbers for group entries. */
 200enum tomoyo_group_id {
 201	TOMOYO_PATH_GROUP,
 202	TOMOYO_NUMBER_GROUP,
 203	TOMOYO_ADDRESS_GROUP,
 204	TOMOYO_MAX_GROUP
 205};
 206
 207/* Index numbers for type of numeric values. */
 208enum tomoyo_value_type {
 209	TOMOYO_VALUE_TYPE_INVALID,
 210	TOMOYO_VALUE_TYPE_DECIMAL,
 211	TOMOYO_VALUE_TYPE_OCTAL,
 212	TOMOYO_VALUE_TYPE_HEXADECIMAL,
 213};
 214
 215/* Index numbers for domain transition control keywords. */
 216enum tomoyo_transition_type {
 217	/* Do not change this order, */
 218	TOMOYO_TRANSITION_CONTROL_NO_RESET,
 219	TOMOYO_TRANSITION_CONTROL_RESET,
 220	TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
 221	TOMOYO_TRANSITION_CONTROL_INITIALIZE,
 222	TOMOYO_TRANSITION_CONTROL_NO_KEEP,
 223	TOMOYO_TRANSITION_CONTROL_KEEP,
 224	TOMOYO_MAX_TRANSITION_TYPE
 225};
 226
 227/* Index numbers for Access Controls. */
 228enum tomoyo_acl_entry_type_index {
 229	TOMOYO_TYPE_PATH_ACL,
 230	TOMOYO_TYPE_PATH2_ACL,
 231	TOMOYO_TYPE_PATH_NUMBER_ACL,
 232	TOMOYO_TYPE_MKDEV_ACL,
 233	TOMOYO_TYPE_MOUNT_ACL,
 234	TOMOYO_TYPE_INET_ACL,
 235	TOMOYO_TYPE_UNIX_ACL,
 236	TOMOYO_TYPE_ENV_ACL,
 237	TOMOYO_TYPE_MANUAL_TASK_ACL,
 238};
 239
 240/* Index numbers for access controls with one pathname. */
 241enum tomoyo_path_acl_index {
 242	TOMOYO_TYPE_EXECUTE,
 243	TOMOYO_TYPE_READ,
 244	TOMOYO_TYPE_WRITE,
 245	TOMOYO_TYPE_APPEND,
 246	TOMOYO_TYPE_UNLINK,
 247	TOMOYO_TYPE_GETATTR,
 248	TOMOYO_TYPE_RMDIR,
 249	TOMOYO_TYPE_TRUNCATE,
 250	TOMOYO_TYPE_SYMLINK,
 251	TOMOYO_TYPE_CHROOT,
 252	TOMOYO_TYPE_UMOUNT,
 253	TOMOYO_MAX_PATH_OPERATION
 254};
 255
 256/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 257enum tomoyo_memory_stat_type {
 258	TOMOYO_MEMORY_POLICY,
 259	TOMOYO_MEMORY_AUDIT,
 260	TOMOYO_MEMORY_QUERY,
 261	TOMOYO_MAX_MEMORY_STAT
 262};
 263
 264enum tomoyo_mkdev_acl_index {
 265	TOMOYO_TYPE_MKBLOCK,
 266	TOMOYO_TYPE_MKCHAR,
 267	TOMOYO_MAX_MKDEV_OPERATION
 268};
 269
 270/* Index numbers for socket operations. */
 271enum tomoyo_network_acl_index {
 272	TOMOYO_NETWORK_BIND,    /* bind() operation. */
 273	TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
 274	TOMOYO_NETWORK_CONNECT, /* connect() operation. */
 275	TOMOYO_NETWORK_SEND,    /* send() operation. */
 276	TOMOYO_MAX_NETWORK_OPERATION
 277};
 278
 279/* Index numbers for access controls with two pathnames. */
 280enum tomoyo_path2_acl_index {
 281	TOMOYO_TYPE_LINK,
 282	TOMOYO_TYPE_RENAME,
 283	TOMOYO_TYPE_PIVOT_ROOT,
 284	TOMOYO_MAX_PATH2_OPERATION
 285};
 286
 287/* Index numbers for access controls with one pathname and one number. */
 288enum tomoyo_path_number_acl_index {
 289	TOMOYO_TYPE_CREATE,
 290	TOMOYO_TYPE_MKDIR,
 291	TOMOYO_TYPE_MKFIFO,
 292	TOMOYO_TYPE_MKSOCK,
 293	TOMOYO_TYPE_IOCTL,
 294	TOMOYO_TYPE_CHMOD,
 295	TOMOYO_TYPE_CHOWN,
 296	TOMOYO_TYPE_CHGRP,
 297	TOMOYO_MAX_PATH_NUMBER_OPERATION
 298};
 299
 300/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
 301enum tomoyo_securityfs_interface_index {
 302	TOMOYO_DOMAINPOLICY,
 303	TOMOYO_EXCEPTIONPOLICY,
 304	TOMOYO_PROCESS_STATUS,
 305	TOMOYO_STAT,
 306	TOMOYO_AUDIT,
 307	TOMOYO_VERSION,
 308	TOMOYO_PROFILE,
 309	TOMOYO_QUERY,
 310	TOMOYO_MANAGER
 311};
 312
 313/* Index numbers for special mount operations. */
 314enum tomoyo_special_mount {
 315	TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
 316	TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
 317	TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
 318	TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
 319	TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
 320	TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
 321	TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
 322	TOMOYO_MAX_SPECIAL_MOUNT
 323};
 324
 325/* Index numbers for functionality. */
 326enum tomoyo_mac_index {
 327	TOMOYO_MAC_FILE_EXECUTE,
 328	TOMOYO_MAC_FILE_OPEN,
 329	TOMOYO_MAC_FILE_CREATE,
 330	TOMOYO_MAC_FILE_UNLINK,
 331	TOMOYO_MAC_FILE_GETATTR,
 332	TOMOYO_MAC_FILE_MKDIR,
 333	TOMOYO_MAC_FILE_RMDIR,
 334	TOMOYO_MAC_FILE_MKFIFO,
 335	TOMOYO_MAC_FILE_MKSOCK,
 336	TOMOYO_MAC_FILE_TRUNCATE,
 337	TOMOYO_MAC_FILE_SYMLINK,
 338	TOMOYO_MAC_FILE_MKBLOCK,
 339	TOMOYO_MAC_FILE_MKCHAR,
 340	TOMOYO_MAC_FILE_LINK,
 341	TOMOYO_MAC_FILE_RENAME,
 342	TOMOYO_MAC_FILE_CHMOD,
 343	TOMOYO_MAC_FILE_CHOWN,
 344	TOMOYO_MAC_FILE_CHGRP,
 345	TOMOYO_MAC_FILE_IOCTL,
 346	TOMOYO_MAC_FILE_CHROOT,
 347	TOMOYO_MAC_FILE_MOUNT,
 348	TOMOYO_MAC_FILE_UMOUNT,
 349	TOMOYO_MAC_FILE_PIVOT_ROOT,
 350	TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
 351	TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
 352	TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
 353	TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
 354	TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
 355	TOMOYO_MAC_NETWORK_INET_RAW_BIND,
 356	TOMOYO_MAC_NETWORK_INET_RAW_SEND,
 357	TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
 358	TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
 359	TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
 360	TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
 361	TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
 362	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
 363	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
 364	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 365	TOMOYO_MAC_ENVIRON,
 366	TOMOYO_MAX_MAC_INDEX
 367};
 368
 369/* Index numbers for category of functionality. */
 370enum tomoyo_mac_category_index {
 371	TOMOYO_MAC_CATEGORY_FILE,
 372	TOMOYO_MAC_CATEGORY_NETWORK,
 373	TOMOYO_MAC_CATEGORY_MISC,
 374	TOMOYO_MAX_MAC_CATEGORY_INDEX
 375};
 376
 377/*
 378 * Retry this request. Returned by tomoyo_supervisor() if policy violation has
 379 * occurred in enforcing mode and the userspace daemon decided to retry.
 380 *
 381 * We must choose a positive value in order to distinguish "granted" (which is
 382 * 0) and "rejected" (which is a negative value) and "retry".
 383 */
 384#define TOMOYO_RETRY_REQUEST 1
 385
 386/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
 387enum tomoyo_policy_stat_type {
 388	/* Do not change this order. */
 389	TOMOYO_STAT_POLICY_UPDATES,
 390	TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
 391	TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
 392	TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
 393	TOMOYO_MAX_POLICY_STAT
 394};
 395
 396/* Index numbers for profile's PREFERENCE values. */
 397enum tomoyo_pref_index {
 398	TOMOYO_PREF_MAX_AUDIT_LOG,
 399	TOMOYO_PREF_MAX_LEARNING_ENTRY,
 400	TOMOYO_MAX_PREF
 401};
 402
 403/********** Structure definitions. **********/
 404
 405/* Common header for holding ACL entries. */
 406struct tomoyo_acl_head {
 407	struct list_head list;
 408	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 409} __packed;
 410
 411/* Common header for shared entries. */
 412struct tomoyo_shared_acl_head {
 413	struct list_head list;
 414	atomic_t users;
 415} __packed;
 416
 417struct tomoyo_policy_namespace;
 418
 419/* Structure for request info. */
 420struct tomoyo_request_info {
 421	/*
 422	 * For holding parameters specific to operations which deal files.
 423	 * NULL if not dealing files.
 424	 */
 425	struct tomoyo_obj_info *obj;
 426	/*
 427	 * For holding parameters specific to execve() request.
 428	 * NULL if not dealing execve().
 429	 */
 430	struct tomoyo_execve *ee;
 431	struct tomoyo_domain_info *domain;
 432	/* For holding parameters. */
 433	union {
 434		struct {
 435			const struct tomoyo_path_info *filename;
 436			/* For using wildcards at tomoyo_find_next_domain(). */
 437			const struct tomoyo_path_info *matched_path;
 438			/* One of values in "enum tomoyo_path_acl_index". */
 439			u8 operation;
 440		} path;
 441		struct {
 442			const struct tomoyo_path_info *filename1;
 443			const struct tomoyo_path_info *filename2;
 444			/* One of values in "enum tomoyo_path2_acl_index". */
 445			u8 operation;
 446		} path2;
 447		struct {
 448			const struct tomoyo_path_info *filename;
 449			unsigned int mode;
 450			unsigned int major;
 451			unsigned int minor;
 452			/* One of values in "enum tomoyo_mkdev_acl_index". */
 453			u8 operation;
 454		} mkdev;
 455		struct {
 456			const struct tomoyo_path_info *filename;
 457			unsigned long number;
 458			/*
 459			 * One of values in
 460			 * "enum tomoyo_path_number_acl_index".
 461			 */
 462			u8 operation;
 463		} path_number;
 464		struct {
 465			const struct tomoyo_path_info *name;
 466		} environ;
 467		struct {
 468			const __be32 *address;
 469			u16 port;
 470			/* One of values smaller than TOMOYO_SOCK_MAX. */
 471			u8 protocol;
 472			/* One of values in "enum tomoyo_network_acl_index". */
 473			u8 operation;
 474			bool is_ipv6;
 475		} inet_network;
 476		struct {
 477			const struct tomoyo_path_info *address;
 478			/* One of values smaller than TOMOYO_SOCK_MAX. */
 479			u8 protocol;
 480			/* One of values in "enum tomoyo_network_acl_index". */
 481			u8 operation;
 482		} unix_network;
 483		struct {
 484			const struct tomoyo_path_info *type;
 485			const struct tomoyo_path_info *dir;
 486			const struct tomoyo_path_info *dev;
 487			unsigned long flags;
 488			int need_dev;
 489		} mount;
 490		struct {
 491			const struct tomoyo_path_info *domainname;
 492		} task;
 493	} param;
 494	struct tomoyo_acl_info *matched_acl;
 495	u8 param_type;
 496	bool granted;
 497	u8 retry;
 498	u8 profile;
 499	u8 mode; /* One of tomoyo_mode_index . */
 500	u8 type;
 501};
 502
 503/* Structure for holding a token. */
 504struct tomoyo_path_info {
 505	const char *name;
 506	u32 hash;          /* = full_name_hash(name, strlen(name)) */
 507	u16 const_len;     /* = tomoyo_const_part_length(name)     */
 508	bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
 509	bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
 510};
 511
 512/* Structure for holding string data. */
 513struct tomoyo_name {
 514	struct tomoyo_shared_acl_head head;
 515	struct tomoyo_path_info entry;
 516};
 517
 518/* Structure for holding a word. */
 519struct tomoyo_name_union {
 520	/* Either @filename or @group is NULL. */
 521	const struct tomoyo_path_info *filename;
 522	struct tomoyo_group *group;
 523};
 524
 525/* Structure for holding a number. */
 526struct tomoyo_number_union {
 527	unsigned long values[2];
 528	struct tomoyo_group *group; /* Maybe NULL. */
 529	/* One of values in "enum tomoyo_value_type". */
 530	u8 value_type[2];
 531};
 532
 533/* Structure for holding an IP address. */
 534struct tomoyo_ipaddr_union {
 535	struct in6_addr ip[2]; /* Big endian. */
 536	struct tomoyo_group *group; /* Pointer to address group. */
 537	bool is_ipv6; /* Valid only if @group == NULL. */
 538};
 539
 540/* Structure for "path_group"/"number_group"/"address_group" directive. */
 541struct tomoyo_group {
 542	struct tomoyo_shared_acl_head head;
 543	const struct tomoyo_path_info *group_name;
 544	struct list_head member_list;
 545};
 546
 547/* Structure for "path_group" directive. */
 548struct tomoyo_path_group {
 549	struct tomoyo_acl_head head;
 550	const struct tomoyo_path_info *member_name;
 551};
 552
 553/* Structure for "number_group" directive. */
 554struct tomoyo_number_group {
 555	struct tomoyo_acl_head head;
 556	struct tomoyo_number_union number;
 557};
 558
 559/* Structure for "address_group" directive. */
 560struct tomoyo_address_group {
 561	struct tomoyo_acl_head head;
 562	/* Structure for holding an IP address. */
 563	struct tomoyo_ipaddr_union address;
 564};
 565
 566/* Subset of "struct stat". Used by conditional ACL and audit logs. */
 567struct tomoyo_mini_stat {
 568	kuid_t uid;
 569	kgid_t gid;
 570	ino_t ino;
 571	umode_t mode;
 572	dev_t dev;
 573	dev_t rdev;
 574};
 575
 576/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
 577struct tomoyo_page_dump {
 578	struct page *page;    /* Previously dumped page. */
 579	char *data;           /* Contents of "page". Size is PAGE_SIZE. */
 580};
 581
 582/* Structure for attribute checks in addition to pathname checks. */
 583struct tomoyo_obj_info {
 584	/*
 585	 * True if tomoyo_get_attributes() was already called, false otherwise.
 586	 */
 587	bool validate_done;
 588	/* True if @stat[] is valid. */
 589	bool stat_valid[TOMOYO_MAX_PATH_STAT];
 590	/* First pathname. Initialized with { NULL, NULL } if no path. */
 591	struct path path1;
 592	/* Second pathname. Initialized with { NULL, NULL } if no path. */
 593	struct path path2;
 594	/*
 595	 * Information on @path1, @path1's parent directory, @path2, @path2's
 596	 * parent directory.
 597	 */
 598	struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
 599	/*
 600	 * Content of symbolic link to be created. NULL for operations other
 601	 * than symlink().
 602	 */
 603	struct tomoyo_path_info *symlink_target;
 604};
 605
 606/* Structure for argv[]. */
 607struct tomoyo_argv {
 608	unsigned long index;
 609	const struct tomoyo_path_info *value;
 610	bool is_not;
 611};
 612
 613/* Structure for envp[]. */
 614struct tomoyo_envp {
 615	const struct tomoyo_path_info *name;
 616	const struct tomoyo_path_info *value;
 617	bool is_not;
 618};
 619
 620/* Structure for execve() operation. */
 621struct tomoyo_execve {
 622	struct tomoyo_request_info r;
 623	struct tomoyo_obj_info obj;
 624	struct linux_binprm *bprm;
 625	const struct tomoyo_path_info *transition;
 626	/* For dumping argv[] and envp[]. */
 627	struct tomoyo_page_dump dump;
 628	/* For temporary use. */
 629	char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
 630};
 631
 632/* Structure for entries which follows "struct tomoyo_condition". */
 633struct tomoyo_condition_element {
 634	/*
 635	 * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
 636	 * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
 637	 * of the array of this struct.
 638	 */
 639	u8 left;
 640	/*
 641	 * Right hand operand. A "struct tomoyo_number_union" for
 642	 * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
 643	 * TOMOYO_NAME_UNION is attached to the tail of the array of this
 644	 * struct.
 645	 */
 646	u8 right;
 647	/* Equation operator. True if equals or overlaps, false otherwise. */
 648	bool equals;
 649};
 650
 651/* Structure for optional arguments. */
 652struct tomoyo_condition {
 653	struct tomoyo_shared_acl_head head;
 654	u32 size; /* Memory size allocated for this entry. */
 655	u16 condc; /* Number of conditions in this struct. */
 656	u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
 657	u16 names_count; /* Number of "struct tomoyo_name_union names". */
 658	u16 argc; /* Number of "struct tomoyo_argv". */
 659	u16 envc; /* Number of "struct tomoyo_envp". */
 660	u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
 661	const struct tomoyo_path_info *transit; /* Maybe NULL. */
 662	/*
 663	 * struct tomoyo_condition_element condition[condc];
 664	 * struct tomoyo_number_union values[numbers_count];
 665	 * struct tomoyo_name_union names[names_count];
 666	 * struct tomoyo_argv argv[argc];
 667	 * struct tomoyo_envp envp[envc];
 668	 */
 669};
 670
 671/* Common header for individual entries. */
 672struct tomoyo_acl_info {
 673	struct list_head list;
 674	struct tomoyo_condition *cond; /* Maybe NULL. */
 675	s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
 676	u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
 677} __packed;
 678
 679/* Structure for domain information. */
 680struct tomoyo_domain_info {
 681	struct list_head list;
 682	struct list_head acl_info_list;
 683	/* Name of this domain. Never NULL.          */
 684	const struct tomoyo_path_info *domainname;
 685	/* Namespace for this domain. Never NULL. */
 686	struct tomoyo_policy_namespace *ns;
 687	/* Group numbers to use.   */
 688	unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
 689	u8 profile;        /* Profile number to use. */
 
 690	bool is_deleted;   /* Delete flag.           */
 691	bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
 692	atomic_t users; /* Number of referring tasks. */
 693};
 694
 695/*
 696 * Structure for "task manual_domain_transition" directive.
 697 */
 698struct tomoyo_task_acl {
 699	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
 700	/* Pointer to domainname. */
 701	const struct tomoyo_path_info *domainname;
 702};
 703
 704/*
 705 * Structure for "file execute", "file read", "file write", "file append",
 706 * "file unlink", "file getattr", "file rmdir", "file truncate",
 707 * "file symlink", "file chroot" and "file unmount" directive.
 708 */
 709struct tomoyo_path_acl {
 710	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
 711	u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
 712	struct tomoyo_name_union name;
 713};
 714
 715/*
 716 * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
 717 * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
 718 */
 719struct tomoyo_path_number_acl {
 720	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
 721	/* Bitmask of values in "enum tomoyo_path_number_acl_index". */
 722	u8 perm;
 723	struct tomoyo_name_union name;
 724	struct tomoyo_number_union number;
 725};
 726
 727/* Structure for "file mkblock" and "file mkchar" directive. */
 728struct tomoyo_mkdev_acl {
 729	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
 730	u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
 731	struct tomoyo_name_union name;
 732	struct tomoyo_number_union mode;
 733	struct tomoyo_number_union major;
 734	struct tomoyo_number_union minor;
 735};
 736
 737/*
 738 * Structure for "file rename", "file link" and "file pivot_root" directive.
 739 */
 740struct tomoyo_path2_acl {
 741	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
 742	u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
 743	struct tomoyo_name_union name1;
 744	struct tomoyo_name_union name2;
 745};
 746
 747/* Structure for "file mount" directive. */
 748struct tomoyo_mount_acl {
 749	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
 750	struct tomoyo_name_union dev_name;
 751	struct tomoyo_name_union dir_name;
 752	struct tomoyo_name_union fs_type;
 753	struct tomoyo_number_union flags;
 754};
 755
 756/* Structure for "misc env" directive in domain policy. */
 757struct tomoyo_env_acl {
 758	struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
 759	const struct tomoyo_path_info *env; /* environment variable */
 760};
 761
 762/* Structure for "network inet" directive. */
 763struct tomoyo_inet_acl {
 764	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
 765	u8 protocol;
 766	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 767	struct tomoyo_ipaddr_union address;
 768	struct tomoyo_number_union port;
 769};
 770
 771/* Structure for "network unix" directive. */
 772struct tomoyo_unix_acl {
 773	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
 774	u8 protocol;
 775	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
 776	struct tomoyo_name_union name;
 777};
 778
 779/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 780struct tomoyo_acl_param {
 781	char *data;
 782	struct list_head *list;
 783	struct tomoyo_policy_namespace *ns;
 784	bool is_delete;
 785};
 786
 787#define TOMOYO_MAX_IO_READ_QUEUE 64
 788
 789/*
 790 * Structure for reading/writing policy via /sys/kernel/security/tomoyo
 791 * interfaces.
 792 */
 793struct tomoyo_io_buffer {
 794	void (*read)(struct tomoyo_io_buffer *head);
 795	int (*write)(struct tomoyo_io_buffer *head);
 796	__poll_t (*poll)(struct file *file, poll_table *wait);
 797	/* Exclusive lock for this structure.   */
 798	struct mutex io_sem;
 799	char __user *read_user_buf;
 800	size_t read_user_buf_avail;
 801	struct {
 802		struct list_head *ns;
 803		struct list_head *domain;
 804		struct list_head *group;
 805		struct list_head *acl;
 806		size_t avail;
 807		unsigned int step;
 808		unsigned int query_index;
 809		u16 index;
 810		u16 cond_index;
 811		u8 acl_group_index;
 812		u8 cond_step;
 813		u8 bit;
 814		u8 w_pos;
 815		bool eof;
 816		bool print_this_domain_only;
 817		bool print_transition_related_only;
 818		bool print_cond_part;
 819		const char *w[TOMOYO_MAX_IO_READ_QUEUE];
 820	} r;
 821	struct {
 822		struct tomoyo_policy_namespace *ns;
 823		/* The position currently writing to.   */
 824		struct tomoyo_domain_info *domain;
 825		/* Bytes available for writing.         */
 826		size_t avail;
 827		bool is_delete;
 828	} w;
 829	/* Buffer for reading.                  */
 830	char *read_buf;
 831	/* Size of read buffer.                 */
 832	size_t readbuf_size;
 833	/* Buffer for writing.                  */
 834	char *write_buf;
 835	/* Size of write buffer.                */
 836	size_t writebuf_size;
 837	/* Type of this interface.              */
 838	enum tomoyo_securityfs_interface_index type;
 839	/* Users counter protected by tomoyo_io_buffer_list_lock. */
 840	u8 users;
 841	/* List for telling GC not to kfree() elements. */
 842	struct list_head list;
 843};
 844
 845/*
 846 * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
 847 * "no_keep_domain" keyword.
 848 */
 849struct tomoyo_transition_control {
 850	struct tomoyo_acl_head head;
 851	u8 type; /* One of values in "enum tomoyo_transition_type".  */
 852	/* True if the domainname is tomoyo_get_last_name(). */
 853	bool is_last_name;
 854	const struct tomoyo_path_info *domainname; /* Maybe NULL */
 855	const struct tomoyo_path_info *program;    /* Maybe NULL */
 856};
 857
 858/* Structure for "aggregator" keyword. */
 859struct tomoyo_aggregator {
 860	struct tomoyo_acl_head head;
 861	const struct tomoyo_path_info *original_name;
 862	const struct tomoyo_path_info *aggregated_name;
 863};
 864
 865/* Structure for policy manager. */
 866struct tomoyo_manager {
 867	struct tomoyo_acl_head head;
 868	/* A path to program or a domainname. */
 869	const struct tomoyo_path_info *manager;
 870};
 871
 872struct tomoyo_preference {
 873	unsigned int learning_max_entry;
 874	bool enforcing_verbose;
 875	bool learning_verbose;
 876	bool permissive_verbose;
 877};
 878
 879/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
 880struct tomoyo_profile {
 881	const struct tomoyo_path_info *comment;
 882	struct tomoyo_preference *learning;
 883	struct tomoyo_preference *permissive;
 884	struct tomoyo_preference *enforcing;
 885	struct tomoyo_preference preference;
 886	u8 default_config;
 887	u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 888	unsigned int pref[TOMOYO_MAX_PREF];
 889};
 890
 891/* Structure for representing YYYY/MM/DD hh/mm/ss. */
 892struct tomoyo_time {
 893	u16 year;
 894	u8 month;
 895	u8 day;
 896	u8 hour;
 897	u8 min;
 898	u8 sec;
 899};
 900
 901/* Structure for policy namespace. */
 902struct tomoyo_policy_namespace {
 903	/* Profile table. Memory is allocated as needed. */
 904	struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
 905	/* List of "struct tomoyo_group". */
 906	struct list_head group_list[TOMOYO_MAX_GROUP];
 907	/* List of policy. */
 908	struct list_head policy_list[TOMOYO_MAX_POLICY];
 909	/* The global ACL referred by "use_group" keyword. */
 910	struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
 911	/* List for connecting to tomoyo_namespace_list list. */
 912	struct list_head namespace_list;
 913	/* Profile version. Currently only 20150505 is defined. */
 914	unsigned int profile_version;
 915	/* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
 916	const char *name;
 917};
 918
 919/* Structure for "struct task_struct"->security. */
 920struct tomoyo_task {
 921	struct tomoyo_domain_info *domain_info;
 922	struct tomoyo_domain_info *old_domain_info;
 923};
 924
 925/********** Function prototypes. **********/
 926
 927bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
 928				  const struct tomoyo_group *group);
 929bool tomoyo_compare_number_union(const unsigned long value,
 930				 const struct tomoyo_number_union *ptr);
 931bool tomoyo_condition(struct tomoyo_request_info *r,
 932		      const struct tomoyo_condition *cond);
 933bool tomoyo_correct_domain(const unsigned char *domainname);
 934bool tomoyo_correct_path(const char *filename);
 935bool tomoyo_correct_word(const char *string);
 936bool tomoyo_domain_def(const unsigned char *buffer);
 937bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
 938bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
 939		      struct tomoyo_page_dump *dump);
 940bool tomoyo_memory_ok(void *ptr);
 941bool tomoyo_number_matches_group(const unsigned long min,
 942				 const unsigned long max,
 943				 const struct tomoyo_group *group);
 944bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
 945			       struct tomoyo_ipaddr_union *ptr);
 946bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 947			     struct tomoyo_name_union *ptr);
 948bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
 949			       struct tomoyo_number_union *ptr);
 950bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 951				 const struct tomoyo_path_info *pattern);
 952bool tomoyo_permstr(const char *string, const char *keyword);
 953bool tomoyo_str_starts(char **src, const char *find);
 954char *tomoyo_encode(const char *str);
 955char *tomoyo_encode2(const char *str, int str_len);
 956char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 957		      va_list args);
 958char *tomoyo_read_token(struct tomoyo_acl_param *param);
 959char *tomoyo_realpath_from_path(const struct path *path);
 960char *tomoyo_realpath_nofollow(const char *pathname);
 961const char *tomoyo_get_exe(void);
 
 962const struct tomoyo_path_info *tomoyo_compare_name_union
 963(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
 964const struct tomoyo_path_info *tomoyo_get_domainname
 965(struct tomoyo_acl_param *param);
 966const struct tomoyo_path_info *tomoyo_get_name(const char *name);
 967const struct tomoyo_path_info *tomoyo_path_matches_group
 968(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 969int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 970				 const struct path *path, const int flag);
 971void tomoyo_close_control(struct tomoyo_io_buffer *head);
 972int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 973int tomoyo_execute_permission(struct tomoyo_request_info *r,
 974			      const struct tomoyo_path_info *filename);
 975int tomoyo_find_next_domain(struct linux_binprm *bprm);
 976int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
 977		    const u8 index);
 978int tomoyo_init_request_info(struct tomoyo_request_info *r,
 979			     struct tomoyo_domain_info *domain,
 980			     const u8 index);
 981int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
 982		      const unsigned int mode, unsigned int dev);
 983int tomoyo_mount_permission(const char *dev_name, const struct path *path,
 984			    const char *type, unsigned long flags,
 985			    void *data_page);
 986int tomoyo_open_control(const u8 type, struct file *file);
 987int tomoyo_path2_perm(const u8 operation, const struct path *path1,
 988		      const struct path *path2);
 989int tomoyo_path_number_perm(const u8 operation, const struct path *path,
 990			    unsigned long number);
 991int tomoyo_path_perm(const u8 operation, const struct path *path,
 992		     const char *target);
 993__poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
 994__poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
 995int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
 996				  int addr_len);
 997int tomoyo_socket_connect_permission(struct socket *sock,
 998				     struct sockaddr *addr, int addr_len);
 999int tomoyo_socket_listen_permission(struct socket *sock);
1000int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
1001				     int size);
1002int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1003	__printf(2, 3);
1004int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
1005			 struct tomoyo_acl_param *param,
1006			 bool (*check_duplicate)
1007			 (const struct tomoyo_acl_info *,
1008			  const struct tomoyo_acl_info *),
1009			 bool (*merge_duplicate)
1010			 (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1011			  const bool));
1012int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1013			 struct tomoyo_acl_param *param,
1014			 bool (*check_duplicate)
1015			 (const struct tomoyo_acl_head *,
1016			  const struct tomoyo_acl_head *));
1017int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1018int tomoyo_write_file(struct tomoyo_acl_param *param);
1019int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1020int tomoyo_write_misc(struct tomoyo_acl_param *param);
1021int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1022int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1023				    const u8 type);
1024int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1025ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1026			    const int buffer_len);
1027ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1028			     const char __user *buffer, const int buffer_len);
1029struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1030struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1031						const bool transit);
1032struct tomoyo_domain_info *tomoyo_domain(void);
1033struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1034struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1035				      const u8 idx);
1036struct tomoyo_policy_namespace *tomoyo_assign_namespace
1037(const char *domainname);
1038struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1039				      const u8 profile);
1040unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1041				const u8 index);
1042u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1043void *tomoyo_commit_ok(void *data, const unsigned int size);
1044void __init tomoyo_load_builtin_policy(void);
1045void __init tomoyo_mm_init(void);
1046void tomoyo_check_acl(struct tomoyo_request_info *r,
1047		      bool (*check_entry)(struct tomoyo_request_info *,
1048					  const struct tomoyo_acl_info *));
1049void tomoyo_check_profile(void);
1050void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1051void tomoyo_del_condition(struct list_head *element);
1052void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1053void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1054void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1055void tomoyo_load_policy(const char *filename);
1056void tomoyo_normalize_line(unsigned char *buffer);
1057void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1058void tomoyo_print_ip(char *buf, const unsigned int size,
1059		     const struct tomoyo_ipaddr_union *ptr);
1060void tomoyo_print_ulong(char *buffer, const int buffer_len,
1061			const unsigned long value, const u8 type);
1062void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1063void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1064void tomoyo_read_log(struct tomoyo_io_buffer *head);
1065void tomoyo_update_stat(const u8 index);
1066void tomoyo_warn_oom(const char *function);
1067void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1068	__printf(2, 3);
1069void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1070		       va_list args);
1071
1072/********** External variable definitions. **********/
1073
1074extern bool tomoyo_policy_loaded;
1075extern int tomoyo_enabled;
1076extern const char * const tomoyo_condition_keyword
1077[TOMOYO_MAX_CONDITION_KEYWORD];
1078extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1079extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1080					      + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1081extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1082extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1083extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1084extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1085extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1086extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1087extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1088extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1089extern struct list_head tomoyo_condition_list;
1090extern struct list_head tomoyo_domain_list;
1091extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1092extern struct list_head tomoyo_namespace_list;
1093extern struct mutex tomoyo_policy_lock;
1094extern struct srcu_struct tomoyo_ss;
1095extern struct tomoyo_domain_info tomoyo_kernel_domain;
1096extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1097extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1098extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1099extern struct lsm_blob_sizes tomoyo_blob_sizes;
1100
1101/********** Inlined functions. **********/
1102
1103/**
1104 * tomoyo_read_lock - Take lock for protecting policy.
1105 *
1106 * Returns index number for tomoyo_read_unlock().
1107 */
1108static inline int tomoyo_read_lock(void)
1109{
1110	return srcu_read_lock(&tomoyo_ss);
1111}
1112
1113/**
1114 * tomoyo_read_unlock - Release lock for protecting policy.
1115 *
1116 * @idx: Index number returned by tomoyo_read_lock().
1117 *
1118 * Returns nothing.
1119 */
1120static inline void tomoyo_read_unlock(int idx)
1121{
1122	srcu_read_unlock(&tomoyo_ss, idx);
1123}
1124
1125/**
1126 * tomoyo_sys_getppid - Copy of getppid().
1127 *
1128 * Returns parent process's PID.
1129 *
1130 * Alpha does not have getppid() defined. To be able to build this module on
1131 * Alpha, I have to copy getppid() from kernel/timer.c.
1132 */
1133static inline pid_t tomoyo_sys_getppid(void)
1134{
1135	pid_t pid;
1136
1137	rcu_read_lock();
1138	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1139	rcu_read_unlock();
1140	return pid;
1141}
1142
1143/**
1144 * tomoyo_sys_getpid - Copy of getpid().
1145 *
1146 * Returns current thread's PID.
1147 *
1148 * Alpha does not have getpid() defined. To be able to build this module on
1149 * Alpha, I have to copy getpid() from kernel/timer.c.
1150 */
1151static inline pid_t tomoyo_sys_getpid(void)
1152{
1153	return task_tgid_vnr(current);
1154}
1155
1156/**
1157 * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1158 *
1159 * @a: Pointer to "struct tomoyo_path_info".
1160 * @b: Pointer to "struct tomoyo_path_info".
1161 *
1162 * Returns true if @a == @b, false otherwise.
1163 */
1164static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1165				  const struct tomoyo_path_info *b)
1166{
1167	return a->hash != b->hash || strcmp(a->name, b->name);
1168}
1169
1170/**
1171 * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1172 *
1173 * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1174 *
1175 * Returns nothing.
1176 */
1177static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1178{
1179	if (name) {
1180		struct tomoyo_name *ptr =
1181			container_of(name, typeof(*ptr), entry);
1182		atomic_dec(&ptr->head.users);
1183	}
1184}
1185
1186/**
1187 * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1188 *
1189 * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1190 *
1191 * Returns nothing.
1192 */
1193static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1194{
1195	if (cond)
1196		atomic_dec(&cond->head.users);
1197}
1198
1199/**
1200 * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1201 *
1202 * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1203 *
1204 * Returns nothing.
1205 */
1206static inline void tomoyo_put_group(struct tomoyo_group *group)
1207{
1208	if (group)
1209		atomic_dec(&group->head.users);
1210}
1211
1212/**
1213 * tomoyo_task - Get "struct tomoyo_task" for specified thread.
 
 
 
 
 
 
 
 
 
 
1214 *
1215 * @task - Pointer to "struct task_struct".
1216 *
1217 * Returns pointer to "struct tomoyo_task" for specified thread.
1218 */
1219static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
 
1220{
1221	return task->security + tomoyo_blob_sizes.lbs_task;
1222}
1223
1224/**
1225 * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1226 *
1227 * @a: Pointer to "struct tomoyo_name_union".
1228 * @b: Pointer to "struct tomoyo_name_union".
1229 *
1230 * Returns true if @a == @b, false otherwise.
1231 */
1232static inline bool tomoyo_same_name_union
1233(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1234{
1235	return a->filename == b->filename && a->group == b->group;
1236}
1237
1238/**
1239 * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1240 *
1241 * @a: Pointer to "struct tomoyo_number_union".
1242 * @b: Pointer to "struct tomoyo_number_union".
1243 *
1244 * Returns true if @a == @b, false otherwise.
1245 */
1246static inline bool tomoyo_same_number_union
1247(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1248{
1249	return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1250		a->group == b->group && a->value_type[0] == b->value_type[0] &&
1251		a->value_type[1] == b->value_type[1];
1252}
1253
1254/**
1255 * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1256 *
1257 * @a: Pointer to "struct tomoyo_ipaddr_union".
1258 * @b: Pointer to "struct tomoyo_ipaddr_union".
1259 *
1260 * Returns true if @a == @b, false otherwise.
1261 */
1262static inline bool tomoyo_same_ipaddr_union
1263(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1264{
1265	return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1266		a->is_ipv6 == b->is_ipv6;
1267}
1268
1269/**
1270 * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1271 *
1272 * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1273 */
1274static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1275{
1276	return tomoyo_domain()->ns;
1277}
1278
1279#if defined(CONFIG_SLOB)
1280
1281/**
1282 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1283 *
1284 * @size: Size to be rounded up.
1285 *
1286 * Returns @size.
1287 *
1288 * Since SLOB does not round up, this function simply returns @size.
1289 */
1290static inline int tomoyo_round2(size_t size)
1291{
1292	return size;
1293}
1294
1295#else
1296
1297/**
1298 * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1299 *
1300 * @size: Size to be rounded up.
1301 *
1302 * Returns rounded size.
1303 *
1304 * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1305 * (e.g.) 128 bytes.
1306 */
1307static inline int tomoyo_round2(size_t size)
1308{
1309#if PAGE_SIZE == 4096
1310	size_t bsize = 32;
1311#else
1312	size_t bsize = 64;
1313#endif
1314	if (!size)
1315		return 0;
1316	while (size > bsize)
1317		bsize <<= 1;
1318	return bsize;
1319}
1320
1321#endif
1322
1323/**
1324 * list_for_each_cookie - iterate over a list with cookie.
1325 * @pos:        the &struct list_head to use as a loop cursor.
1326 * @head:       the head for your list.
1327 */
1328#define list_for_each_cookie(pos, head)					\
1329	if (!pos)							\
1330		pos =  srcu_dereference((head)->next, &tomoyo_ss);	\
1331	for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1332
1333#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */