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TOMOYO Linux Cross Reference
Linux/security/tomoyo/common.h

Version: ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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". */
 65 enum 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(). */
134 enum 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. */
144 enum 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. */
156 enum 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. */
172 enum 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. */
186 enum 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. */
196 enum 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. */
204 enum 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. */
212 enum 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. */
224 enum 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. */
237 enum 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. */
253 enum tomoyo_memory_stat_type {
254         TOMOYO_MEMORY_POLICY,
255         TOMOYO_MEMORY_AUDIT,
256         TOMOYO_MEMORY_QUERY,
257         TOMOYO_MAX_MEMORY_STAT
258 };
259 
260 enum 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. */
267 enum 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. */
276 enum 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. */
284 enum 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. */
297 enum 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. */
310 enum 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. */
322 enum 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. */
366 enum 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. */
383 enum 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. */
393 enum 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. */
402 struct 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. */
408 struct tomoyo_shared_acl_head {
409         struct list_head list;
410         atomic_t users;
411 } __packed;
412 
413 struct tomoyo_policy_namespace;
414 
415 /* Structure for request info. */
416 struct 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. */
500 struct 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. */
509 struct tomoyo_name {
510         struct tomoyo_shared_acl_head head;
511         struct tomoyo_path_info entry;
512 };
513 
514 /* Structure for holding a word. */
515 struct 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. */
522 struct 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. */
530 struct 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. */
537 struct 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. */
544 struct 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. */
550 struct tomoyo_number_group {
551         struct tomoyo_acl_head head;
552         struct tomoyo_number_union number;
553 };
554 
555 /* Structure for "address_group" directive. */
556 struct 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. */
563 struct 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". */
573 struct 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. */
579 struct 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[]. */
603 struct tomoyo_argv {
604         unsigned long index;
605         const struct tomoyo_path_info *value;
606         bool is_not;
607 };
608 
609 /* Structure for envp[]. */
610 struct 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. */
617 struct 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". */
629 struct 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. */
648 struct 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. */
668 struct 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. */
676 struct 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  */
693 struct 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  */
704 struct 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  */
714 struct 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. */
723 struct 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  */
735 struct 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. */
743 struct 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. */
752 struct 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. */
758 struct 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. */
767 struct 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. */
775 struct 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  */
788 struct 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  */
844 struct 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. */
854 struct 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. */
861 struct 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 
867 struct 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. */
875 struct 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. */
887 struct 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. */
897 struct 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 
916 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
917                                   const struct tomoyo_group *group);
918 bool tomoyo_compare_number_union(const unsigned long value,
919                                  const struct tomoyo_number_union *ptr);
920 bool tomoyo_condition(struct tomoyo_request_info *r,
921                       const struct tomoyo_condition *cond);
922 bool tomoyo_correct_domain(const unsigned char *domainname);
923 bool tomoyo_correct_path(const char *filename);
924 bool tomoyo_correct_word(const char *string);
925 bool tomoyo_domain_def(const unsigned char *buffer);
926 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
927 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
928                       struct tomoyo_page_dump *dump);
929 bool tomoyo_memory_ok(void *ptr);
930 bool tomoyo_number_matches_group(const unsigned long min,
931                                  const unsigned long max,
932                                  const struct tomoyo_group *group);
933 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
934                                struct tomoyo_ipaddr_union *ptr);
935 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
936                              struct tomoyo_name_union *ptr);
937 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
938                                struct tomoyo_number_union *ptr);
939 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
940                                  const struct tomoyo_path_info *pattern);
941 bool tomoyo_permstr(const char *string, const char *keyword);
942 bool tomoyo_str_starts(char **src, const char *find);
943 char *tomoyo_encode(const char *str);
944 char *tomoyo_encode2(const char *str, int str_len);
945 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
946                       va_list args);
947 char *tomoyo_read_token(struct tomoyo_acl_param *param);
948 char *tomoyo_realpath_from_path(const struct path *path);
949 char *tomoyo_realpath_nofollow(const char *pathname);
950 const char *tomoyo_get_exe(void);
951 const char *tomoyo_yesno(const unsigned int value);
952 const struct tomoyo_path_info *tomoyo_compare_name_union
953 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
954 const struct tomoyo_path_info *tomoyo_get_domainname
955 (struct tomoyo_acl_param *param);
956 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
957 const struct tomoyo_path_info *tomoyo_path_matches_group
958 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
959 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
960                                  const struct path *path, const int flag);
961 void tomoyo_close_control(struct tomoyo_io_buffer *head);
962 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
963 int tomoyo_execute_permission(struct tomoyo_request_info *r,
964                               const struct tomoyo_path_info *filename);
965 int tomoyo_find_next_domain(struct linux_binprm *bprm);
966 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
967                     const u8 index);
968 int tomoyo_init_request_info(struct tomoyo_request_info *r,
969                              struct tomoyo_domain_info *domain,
970                              const u8 index);
971 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
972                       const unsigned int mode, unsigned int dev);
973 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
974                             const char *type, unsigned long flags,
975                             void *data_page);
976 int tomoyo_open_control(const u8 type, struct file *file);
977 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
978                       const struct path *path2);
979 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
980                             unsigned long number);
981 int tomoyo_path_perm(const u8 operation, const struct path *path,
982                      const char *target);
983 unsigned int tomoyo_poll_control(struct file *file, poll_table *wait);
984 unsigned int tomoyo_poll_log(struct file *file, poll_table *wait);
985 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
986                                   int addr_len);
987 int tomoyo_socket_connect_permission(struct socket *sock,
988                                      struct sockaddr *addr, int addr_len);
989 int tomoyo_socket_listen_permission(struct socket *sock);
990 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
991                                      int size);
992 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
993         __printf(2, 3);
994 int 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));
1002 int 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 *));
1007 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1008 int tomoyo_write_file(struct tomoyo_acl_param *param);
1009 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1010 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1011 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1012 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1013                                     const u8 type);
1014 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1015 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1016                             const int buffer_len);
1017 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1018                              const char __user *buffer, const int buffer_len);
1019 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1020 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1021                                                 const bool transit);
1022 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1023 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1024                                       const u8 idx);
1025 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1026 (const char *domainname);
1027 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1028                                       const u8 profile);
1029 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1030                                 const u8 index);
1031 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1032 void *tomoyo_commit_ok(void *data, const unsigned int size);
1033 void __init tomoyo_load_builtin_policy(void);
1034 void __init tomoyo_mm_init(void);
1035 void tomoyo_check_acl(struct tomoyo_request_info *r,
1036                       bool (*check_entry) (struct tomoyo_request_info *,
1037                                            const struct tomoyo_acl_info *));
1038 void tomoyo_check_profile(void);
1039 void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
1040 void tomoyo_del_condition(struct list_head *element);
1041 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1042 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1043 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1044 void tomoyo_load_policy(const char *filename);
1045 void tomoyo_normalize_line(unsigned char *buffer);
1046 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1047 void tomoyo_print_ip(char *buf, const unsigned int size,
1048                      const struct tomoyo_ipaddr_union *ptr);
1049 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1050                         const unsigned long value, const u8 type);
1051 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1052 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1053 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1054 void tomoyo_update_stat(const u8 index);
1055 void tomoyo_warn_oom(const char *function);
1056 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1057         __printf(2, 3);
1058 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1059                        va_list args);
1060 
1061 /********** External variable definitions. **********/
1062 
1063 extern bool tomoyo_policy_loaded;
1064 extern const char * const tomoyo_condition_keyword
1065 [TOMOYO_MAX_CONDITION_KEYWORD];
1066 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1067 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1068                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1069 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1070 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1071 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1072 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1073 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1074 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1075 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1076 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1077 extern struct list_head tomoyo_condition_list;
1078 extern struct list_head tomoyo_domain_list;
1079 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1080 extern struct list_head tomoyo_namespace_list;
1081 extern struct mutex tomoyo_policy_lock;
1082 extern struct srcu_struct tomoyo_ss;
1083 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1084 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1085 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1086 extern 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  */
1095 static 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  */
1107 static 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  */
1120 static 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  */
1137 static 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  */
1150 static 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  */
1163 static 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  */
1179 static 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  */
1192 static 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  */
1203 static 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  */
1215 static 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  */
1229 static 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  */
1243 static 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  */
1259 static 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  */
1271 static 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  */
1287 static 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  */
1304 static 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) */
1331 

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