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

Version: ~ [ linux-5.12-rc7 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ 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 /* 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 #include <linux/ctype.h>
 14 #include <linux/string.h>
 15 #include <linux/mm.h>
 16 #include <linux/file.h>
 17 #include <linux/kmod.h>
 18 #include <linux/fs.h>
 19 #include <linux/sched.h>
 20 #include <linux/namei.h>
 21 #include <linux/mount.h>
 22 #include <linux/list.h>
 23 #include <linux/cred.h>
 24 #include <linux/poll.h>
 25 #include <linux/binfmts.h>
 26 #include <linux/highmem.h>
 27 #include <linux/net.h>
 28 #include <linux/inet.h>
 29 #include <linux/in.h>
 30 #include <linux/in6.h>
 31 #include <linux/un.h>
 32 #include <net/sock.h>
 33 #include <net/af_unix.h>
 34 #include <net/ip.h>
 35 #include <net/ipv6.h>
 36 #include <net/udp.h>
 37 
 38 /********** Constants definitions. **********/
 39 
 40 /*
 41  * TOMOYO uses this hash only when appending a string into the string
 42  * table. Frequency of appending strings is very low. So we don't need
 43  * large (e.g. 64k) hash size. 256 will be sufficient.
 44  */
 45 #define TOMOYO_HASH_BITS  8
 46 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
 47 
 48 /*
 49  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
 50  * Therefore, we don't need SOCK_MAX.
 51  */
 52 #define TOMOYO_SOCK_MAX 6
 53 
 54 #define TOMOYO_EXEC_TMPSIZE     4096
 55 
 56 /* Garbage collector is trying to kfree() this element. */
 57 #define TOMOYO_GC_IN_PROGRESS -1
 58 
 59 /* Profile number is an integer between 0 and 255. */
 60 #define TOMOYO_MAX_PROFILES 256
 61 
 62 /* Group number is an integer between 0 and 255. */
 63 #define TOMOYO_MAX_ACL_GROUPS 256
 64 
 65 /* Index numbers for "struct tomoyo_condition". */
 66 enum tomoyo_conditions_index {
 67         TOMOYO_TASK_UID,             /* current_uid()   */
 68         TOMOYO_TASK_EUID,            /* current_euid()  */
 69         TOMOYO_TASK_SUID,            /* current_suid()  */
 70         TOMOYO_TASK_FSUID,           /* current_fsuid() */
 71         TOMOYO_TASK_GID,             /* current_gid()   */
 72         TOMOYO_TASK_EGID,            /* current_egid()  */
 73         TOMOYO_TASK_SGID,            /* current_sgid()  */
 74         TOMOYO_TASK_FSGID,           /* current_fsgid() */
 75         TOMOYO_TASK_PID,             /* sys_getpid()   */
 76         TOMOYO_TASK_PPID,            /* sys_getppid()  */
 77         TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
 78         TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
 79         TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
 80         TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
 81         TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
 82         TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
 83         TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
 84         TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
 85         TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
 86         TOMOYO_MODE_SETUID,          /* S_ISUID */
 87         TOMOYO_MODE_SETGID,          /* S_ISGID */
 88         TOMOYO_MODE_STICKY,          /* S_ISVTX */
 89         TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
 90         TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
 91         TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
 92         TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
 93         TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
 94         TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
 95         TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
 96         TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
 97         TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
 98         TOMOYO_EXEC_REALPATH,
 99         TOMOYO_SYMLINK_TARGET,
100         TOMOYO_PATH1_UID,
101         TOMOYO_PATH1_GID,
102         TOMOYO_PATH1_INO,
103         TOMOYO_PATH1_MAJOR,
104         TOMOYO_PATH1_MINOR,
105         TOMOYO_PATH1_PERM,
106         TOMOYO_PATH1_TYPE,
107         TOMOYO_PATH1_DEV_MAJOR,
108         TOMOYO_PATH1_DEV_MINOR,
109         TOMOYO_PATH2_UID,
110         TOMOYO_PATH2_GID,
111         TOMOYO_PATH2_INO,
112         TOMOYO_PATH2_MAJOR,
113         TOMOYO_PATH2_MINOR,
114         TOMOYO_PATH2_PERM,
115         TOMOYO_PATH2_TYPE,
116         TOMOYO_PATH2_DEV_MAJOR,
117         TOMOYO_PATH2_DEV_MINOR,
118         TOMOYO_PATH1_PARENT_UID,
119         TOMOYO_PATH1_PARENT_GID,
120         TOMOYO_PATH1_PARENT_INO,
121         TOMOYO_PATH1_PARENT_PERM,
122         TOMOYO_PATH2_PARENT_UID,
123         TOMOYO_PATH2_PARENT_GID,
124         TOMOYO_PATH2_PARENT_INO,
125         TOMOYO_PATH2_PARENT_PERM,
126         TOMOYO_MAX_CONDITION_KEYWORD,
127         TOMOYO_NUMBER_UNION,
128         TOMOYO_NAME_UNION,
129         TOMOYO_ARGV_ENTRY,
130         TOMOYO_ENVP_ENTRY,
131 };
132 
133 
134 /* Index numbers for stat(). */
135 enum tomoyo_path_stat_index {
136         /* Do not change this order. */
137         TOMOYO_PATH1,
138         TOMOYO_PATH1_PARENT,
139         TOMOYO_PATH2,
140         TOMOYO_PATH2_PARENT,
141         TOMOYO_MAX_PATH_STAT
142 };
143 
144 /* Index numbers for operation mode. */
145 enum tomoyo_mode_index {
146         TOMOYO_CONFIG_DISABLED,
147         TOMOYO_CONFIG_LEARNING,
148         TOMOYO_CONFIG_PERMISSIVE,
149         TOMOYO_CONFIG_ENFORCING,
150         TOMOYO_CONFIG_MAX_MODE,
151         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
152         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
153         TOMOYO_CONFIG_USE_DEFAULT     = 255,
154 };
155 
156 /* Index numbers for entry type. */
157 enum tomoyo_policy_id {
158         TOMOYO_ID_GROUP,
159         TOMOYO_ID_ADDRESS_GROUP,
160         TOMOYO_ID_PATH_GROUP,
161         TOMOYO_ID_NUMBER_GROUP,
162         TOMOYO_ID_TRANSITION_CONTROL,
163         TOMOYO_ID_AGGREGATOR,
164         TOMOYO_ID_MANAGER,
165         TOMOYO_ID_CONDITION,
166         TOMOYO_ID_NAME,
167         TOMOYO_ID_ACL,
168         TOMOYO_ID_DOMAIN,
169         TOMOYO_MAX_POLICY
170 };
171 
172 /* Index numbers for domain's attributes. */
173 enum tomoyo_domain_info_flags_index {
174         /* Quota warnning flag.   */
175         TOMOYO_DIF_QUOTA_WARNED,
176         /*
177          * This domain was unable to create a new domain at
178          * tomoyo_find_next_domain() because the name of the domain to be
179          * created was too long or it could not allocate memory.
180          * More than one process continued execve() without domain transition.
181          */
182         TOMOYO_DIF_TRANSITION_FAILED,
183         TOMOYO_MAX_DOMAIN_INFO_FLAGS
184 };
185 
186 /* Index numbers for audit type. */
187 enum tomoyo_grant_log {
188         /* Follow profile's configuration. */
189         TOMOYO_GRANTLOG_AUTO,
190         /* Do not generate grant log. */
191         TOMOYO_GRANTLOG_NO,
192         /* Generate grant_log. */
193         TOMOYO_GRANTLOG_YES,
194 };
195 
196 /* Index numbers for group entries. */
197 enum tomoyo_group_id {
198         TOMOYO_PATH_GROUP,
199         TOMOYO_NUMBER_GROUP,
200         TOMOYO_ADDRESS_GROUP,
201         TOMOYO_MAX_GROUP
202 };
203 
204 /* Index numbers for type of numeric values. */
205 enum tomoyo_value_type {
206         TOMOYO_VALUE_TYPE_INVALID,
207         TOMOYO_VALUE_TYPE_DECIMAL,
208         TOMOYO_VALUE_TYPE_OCTAL,
209         TOMOYO_VALUE_TYPE_HEXADECIMAL,
210 };
211 
212 /* Index numbers for domain transition control keywords. */
213 enum tomoyo_transition_type {
214         /* Do not change this order, */
215         TOMOYO_TRANSITION_CONTROL_NO_RESET,
216         TOMOYO_TRANSITION_CONTROL_RESET,
217         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
218         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
219         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
220         TOMOYO_TRANSITION_CONTROL_KEEP,
221         TOMOYO_MAX_TRANSITION_TYPE
222 };
223 
224 /* Index numbers for Access Controls. */
225 enum tomoyo_acl_entry_type_index {
226         TOMOYO_TYPE_PATH_ACL,
227         TOMOYO_TYPE_PATH2_ACL,
228         TOMOYO_TYPE_PATH_NUMBER_ACL,
229         TOMOYO_TYPE_MKDEV_ACL,
230         TOMOYO_TYPE_MOUNT_ACL,
231         TOMOYO_TYPE_INET_ACL,
232         TOMOYO_TYPE_UNIX_ACL,
233         TOMOYO_TYPE_ENV_ACL,
234         TOMOYO_TYPE_MANUAL_TASK_ACL,
235 };
236 
237 /* Index numbers for access controls with one pathname. */
238 enum tomoyo_path_acl_index {
239         TOMOYO_TYPE_EXECUTE,
240         TOMOYO_TYPE_READ,
241         TOMOYO_TYPE_WRITE,
242         TOMOYO_TYPE_APPEND,
243         TOMOYO_TYPE_UNLINK,
244         TOMOYO_TYPE_GETATTR,
245         TOMOYO_TYPE_RMDIR,
246         TOMOYO_TYPE_TRUNCATE,
247         TOMOYO_TYPE_SYMLINK,
248         TOMOYO_TYPE_CHROOT,
249         TOMOYO_TYPE_UMOUNT,
250         TOMOYO_MAX_PATH_OPERATION
251 };
252 
253 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
254 enum tomoyo_memory_stat_type {
255         TOMOYO_MEMORY_POLICY,
256         TOMOYO_MEMORY_AUDIT,
257         TOMOYO_MEMORY_QUERY,
258         TOMOYO_MAX_MEMORY_STAT
259 };
260 
261 enum tomoyo_mkdev_acl_index {
262         TOMOYO_TYPE_MKBLOCK,
263         TOMOYO_TYPE_MKCHAR,
264         TOMOYO_MAX_MKDEV_OPERATION
265 };
266 
267 /* Index numbers for socket operations. */
268 enum tomoyo_network_acl_index {
269         TOMOYO_NETWORK_BIND,    /* bind() operation. */
270         TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
271         TOMOYO_NETWORK_CONNECT, /* connect() operation. */
272         TOMOYO_NETWORK_SEND,    /* send() operation. */
273         TOMOYO_MAX_NETWORK_OPERATION
274 };
275 
276 /* Index numbers for access controls with two pathnames. */
277 enum tomoyo_path2_acl_index {
278         TOMOYO_TYPE_LINK,
279         TOMOYO_TYPE_RENAME,
280         TOMOYO_TYPE_PIVOT_ROOT,
281         TOMOYO_MAX_PATH2_OPERATION
282 };
283 
284 /* Index numbers for access controls with one pathname and one number. */
285 enum tomoyo_path_number_acl_index {
286         TOMOYO_TYPE_CREATE,
287         TOMOYO_TYPE_MKDIR,
288         TOMOYO_TYPE_MKFIFO,
289         TOMOYO_TYPE_MKSOCK,
290         TOMOYO_TYPE_IOCTL,
291         TOMOYO_TYPE_CHMOD,
292         TOMOYO_TYPE_CHOWN,
293         TOMOYO_TYPE_CHGRP,
294         TOMOYO_MAX_PATH_NUMBER_OPERATION
295 };
296 
297 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
298 enum tomoyo_securityfs_interface_index {
299         TOMOYO_DOMAINPOLICY,
300         TOMOYO_EXCEPTIONPOLICY,
301         TOMOYO_PROCESS_STATUS,
302         TOMOYO_STAT,
303         TOMOYO_AUDIT,
304         TOMOYO_VERSION,
305         TOMOYO_PROFILE,
306         TOMOYO_QUERY,
307         TOMOYO_MANAGER
308 };
309 
310 /* Index numbers for special mount operations. */
311 enum tomoyo_special_mount {
312         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
313         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
314         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
315         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
316         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
317         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
318         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
319         TOMOYO_MAX_SPECIAL_MOUNT
320 };
321 
322 /* Index numbers for functionality. */
323 enum tomoyo_mac_index {
324         TOMOYO_MAC_FILE_EXECUTE,
325         TOMOYO_MAC_FILE_OPEN,
326         TOMOYO_MAC_FILE_CREATE,
327         TOMOYO_MAC_FILE_UNLINK,
328         TOMOYO_MAC_FILE_GETATTR,
329         TOMOYO_MAC_FILE_MKDIR,
330         TOMOYO_MAC_FILE_RMDIR,
331         TOMOYO_MAC_FILE_MKFIFO,
332         TOMOYO_MAC_FILE_MKSOCK,
333         TOMOYO_MAC_FILE_TRUNCATE,
334         TOMOYO_MAC_FILE_SYMLINK,
335         TOMOYO_MAC_FILE_MKBLOCK,
336         TOMOYO_MAC_FILE_MKCHAR,
337         TOMOYO_MAC_FILE_LINK,
338         TOMOYO_MAC_FILE_RENAME,
339         TOMOYO_MAC_FILE_CHMOD,
340         TOMOYO_MAC_FILE_CHOWN,
341         TOMOYO_MAC_FILE_CHGRP,
342         TOMOYO_MAC_FILE_IOCTL,
343         TOMOYO_MAC_FILE_CHROOT,
344         TOMOYO_MAC_FILE_MOUNT,
345         TOMOYO_MAC_FILE_UMOUNT,
346         TOMOYO_MAC_FILE_PIVOT_ROOT,
347         TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
348         TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
349         TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
350         TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
351         TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
352         TOMOYO_MAC_NETWORK_INET_RAW_BIND,
353         TOMOYO_MAC_NETWORK_INET_RAW_SEND,
354         TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
355         TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
356         TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
357         TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
358         TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
359         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
360         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
361         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
362         TOMOYO_MAC_ENVIRON,
363         TOMOYO_MAX_MAC_INDEX
364 };
365 
366 /* Index numbers for category of functionality. */
367 enum tomoyo_mac_category_index {
368         TOMOYO_MAC_CATEGORY_FILE,
369         TOMOYO_MAC_CATEGORY_NETWORK,
370         TOMOYO_MAC_CATEGORY_MISC,
371         TOMOYO_MAX_MAC_CATEGORY_INDEX
372 };
373 
374 /*
375  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
376  * occurred in enforcing mode and the userspace daemon decided to retry.
377  *
378  * We must choose a positive value in order to distinguish "granted" (which is
379  * 0) and "rejected" (which is a negative value) and "retry".
380  */
381 #define TOMOYO_RETRY_REQUEST 1
382 
383 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
384 enum tomoyo_policy_stat_type {
385         /* Do not change this order. */
386         TOMOYO_STAT_POLICY_UPDATES,
387         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
388         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
389         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
390         TOMOYO_MAX_POLICY_STAT
391 };
392 
393 /* Index numbers for profile's PREFERENCE values. */
394 enum tomoyo_pref_index {
395         TOMOYO_PREF_MAX_AUDIT_LOG,
396         TOMOYO_PREF_MAX_LEARNING_ENTRY,
397         TOMOYO_MAX_PREF
398 };
399 
400 /********** Structure definitions. **********/
401 
402 /* Common header for holding ACL entries. */
403 struct tomoyo_acl_head {
404         struct list_head list;
405         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
406 } __packed;
407 
408 /* Common header for shared entries. */
409 struct tomoyo_shared_acl_head {
410         struct list_head list;
411         atomic_t users;
412 } __packed;
413 
414 struct tomoyo_policy_namespace;
415 
416 /* Structure for request info. */
417 struct tomoyo_request_info {
418         /*
419          * For holding parameters specific to operations which deal files.
420          * NULL if not dealing files.
421          */
422         struct tomoyo_obj_info *obj;
423         /*
424          * For holding parameters specific to execve() request.
425          * NULL if not dealing do_execve().
426          */
427         struct tomoyo_execve *ee;
428         struct tomoyo_domain_info *domain;
429         /* For holding parameters. */
430         union {
431                 struct {
432                         const struct tomoyo_path_info *filename;
433                         /* For using wildcards at tomoyo_find_next_domain(). */
434                         const struct tomoyo_path_info *matched_path;
435                         /* One of values in "enum tomoyo_path_acl_index". */
436                         u8 operation;
437                 } path;
438                 struct {
439                         const struct tomoyo_path_info *filename1;
440                         const struct tomoyo_path_info *filename2;
441                         /* One of values in "enum tomoyo_path2_acl_index". */
442                         u8 operation;
443                 } path2;
444                 struct {
445                         const struct tomoyo_path_info *filename;
446                         unsigned int mode;
447                         unsigned int major;
448                         unsigned int minor;
449                         /* One of values in "enum tomoyo_mkdev_acl_index". */
450                         u8 operation;
451                 } mkdev;
452                 struct {
453                         const struct tomoyo_path_info *filename;
454                         unsigned long number;
455                         /*
456                          * One of values in
457                          * "enum tomoyo_path_number_acl_index".
458                          */
459                         u8 operation;
460                 } path_number;
461                 struct {
462                         const struct tomoyo_path_info *name;
463                 } environ;
464                 struct {
465                         const __be32 *address;
466                         u16 port;
467                         /* One of values smaller than TOMOYO_SOCK_MAX. */
468                         u8 protocol;
469                         /* One of values in "enum tomoyo_network_acl_index". */
470                         u8 operation;
471                         bool is_ipv6;
472                 } inet_network;
473                 struct {
474                         const struct tomoyo_path_info *address;
475                         /* One of values smaller than TOMOYO_SOCK_MAX. */
476                         u8 protocol;
477                         /* One of values in "enum tomoyo_network_acl_index". */
478                         u8 operation;
479                 } unix_network;
480                 struct {
481                         const struct tomoyo_path_info *type;
482                         const struct tomoyo_path_info *dir;
483                         const struct tomoyo_path_info *dev;
484                         unsigned long flags;
485                         int need_dev;
486                 } mount;
487                 struct {
488                         const struct tomoyo_path_info *domainname;
489                 } task;
490         } param;
491         struct tomoyo_acl_info *matched_acl;
492         u8 param_type;
493         bool granted;
494         u8 retry;
495         u8 profile;
496         u8 mode; /* One of tomoyo_mode_index . */
497         u8 type;
498 };
499 
500 /* Structure for holding a token. */
501 struct tomoyo_path_info {
502         const char *name;
503         u32 hash;          /* = full_name_hash(name, strlen(name)) */
504         u16 const_len;     /* = tomoyo_const_part_length(name)     */
505         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
506         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
507 };
508 
509 /* Structure for holding string data. */
510 struct tomoyo_name {
511         struct tomoyo_shared_acl_head head;
512         struct tomoyo_path_info entry;
513 };
514 
515 /* Structure for holding a word. */
516 struct tomoyo_name_union {
517         /* Either @filename or @group is NULL. */
518         const struct tomoyo_path_info *filename;
519         struct tomoyo_group *group;
520 };
521 
522 /* Structure for holding a number. */
523 struct tomoyo_number_union {
524         unsigned long values[2];
525         struct tomoyo_group *group; /* Maybe NULL. */
526         /* One of values in "enum tomoyo_value_type". */
527         u8 value_type[2];
528 };
529 
530 /* Structure for holding an IP address. */
531 struct tomoyo_ipaddr_union {
532         struct in6_addr ip[2]; /* Big endian. */
533         struct tomoyo_group *group; /* Pointer to address group. */
534         bool is_ipv6; /* Valid only if @group == NULL. */
535 };
536 
537 /* Structure for "path_group"/"number_group"/"address_group" directive. */
538 struct tomoyo_group {
539         struct tomoyo_shared_acl_head head;
540         const struct tomoyo_path_info *group_name;
541         struct list_head member_list;
542 };
543 
544 /* Structure for "path_group" directive. */
545 struct tomoyo_path_group {
546         struct tomoyo_acl_head head;
547         const struct tomoyo_path_info *member_name;
548 };
549 
550 /* Structure for "number_group" directive. */
551 struct tomoyo_number_group {
552         struct tomoyo_acl_head head;
553         struct tomoyo_number_union number;
554 };
555 
556 /* Structure for "address_group" directive. */
557 struct tomoyo_address_group {
558         struct tomoyo_acl_head head;
559         /* Structure for holding an IP address. */
560         struct tomoyo_ipaddr_union address;
561 };
562 
563 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
564 struct tomoyo_mini_stat {
565         kuid_t uid;
566         kgid_t gid;
567         ino_t ino;
568         umode_t mode;
569         dev_t dev;
570         dev_t rdev;
571 };
572 
573 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
574 struct tomoyo_page_dump {
575         struct page *page;    /* Previously dumped page. */
576         char *data;           /* Contents of "page". Size is PAGE_SIZE. */
577 };
578 
579 /* Structure for attribute checks in addition to pathname checks. */
580 struct tomoyo_obj_info {
581         /*
582          * True if tomoyo_get_attributes() was already called, false otherwise.
583          */
584         bool validate_done;
585         /* True if @stat[] is valid. */
586         bool stat_valid[TOMOYO_MAX_PATH_STAT];
587         /* First pathname. Initialized with { NULL, NULL } if no path. */
588         struct path path1;
589         /* Second pathname. Initialized with { NULL, NULL } if no path. */
590         struct path path2;
591         /*
592          * Information on @path1, @path1's parent directory, @path2, @path2's
593          * parent directory.
594          */
595         struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
596         /*
597          * Content of symbolic link to be created. NULL for operations other
598          * than symlink().
599          */
600         struct tomoyo_path_info *symlink_target;
601 };
602 
603 /* Structure for argv[]. */
604 struct tomoyo_argv {
605         unsigned long index;
606         const struct tomoyo_path_info *value;
607         bool is_not;
608 };
609 
610 /* Structure for envp[]. */
611 struct tomoyo_envp {
612         const struct tomoyo_path_info *name;
613         const struct tomoyo_path_info *value;
614         bool is_not;
615 };
616 
617 /* Structure for execve() operation. */
618 struct tomoyo_execve {
619         struct tomoyo_request_info r;
620         struct tomoyo_obj_info obj;
621         struct linux_binprm *bprm;
622         const struct tomoyo_path_info *transition;
623         /* For dumping argv[] and envp[]. */
624         struct tomoyo_page_dump dump;
625         /* For temporary use. */
626         char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
627 };
628 
629 /* Structure for entries which follows "struct tomoyo_condition". */
630 struct tomoyo_condition_element {
631         /*
632          * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
633          * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
634          * of the array of this struct.
635          */
636         u8 left;
637         /*
638          * Right hand operand. A "struct tomoyo_number_union" for
639          * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
640          * TOMOYO_NAME_UNION is attached to the tail of the array of this
641          * struct.
642          */
643         u8 right;
644         /* Equation operator. True if equals or overlaps, false otherwise. */
645         bool equals;
646 };
647 
648 /* Structure for optional arguments. */
649 struct tomoyo_condition {
650         struct tomoyo_shared_acl_head head;
651         u32 size; /* Memory size allocated for this entry. */
652         u16 condc; /* Number of conditions in this struct. */
653         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
654         u16 names_count; /* Number of "struct tomoyo_name_union names". */
655         u16 argc; /* Number of "struct tomoyo_argv". */
656         u16 envc; /* Number of "struct tomoyo_envp". */
657         u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
658         const struct tomoyo_path_info *transit; /* Maybe NULL. */
659         /*
660          * struct tomoyo_condition_element condition[condc];
661          * struct tomoyo_number_union values[numbers_count];
662          * struct tomoyo_name_union names[names_count];
663          * struct tomoyo_argv argv[argc];
664          * struct tomoyo_envp envp[envc];
665          */
666 };
667 
668 /* Common header for individual entries. */
669 struct tomoyo_acl_info {
670         struct list_head list;
671         struct tomoyo_condition *cond; /* Maybe NULL. */
672         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
673         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
674 } __packed;
675 
676 /* Structure for domain information. */
677 struct tomoyo_domain_info {
678         struct list_head list;
679         struct list_head acl_info_list;
680         /* Name of this domain. Never NULL.          */
681         const struct tomoyo_path_info *domainname;
682         /* Namespace for this domain. Never NULL. */
683         struct tomoyo_policy_namespace *ns;
684         u8 profile;        /* Profile number to use. */
685         u8 group;          /* Group number to use.   */
686         bool is_deleted;   /* Delete flag.           */
687         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
688         atomic_t users; /* Number of referring credentials. */
689 };
690 
691 /*
692  * Structure for "task manual_domain_transition" directive.
693  */
694 struct tomoyo_task_acl {
695         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
696         /* Pointer to domainname. */
697         const struct tomoyo_path_info *domainname;
698 };
699 
700 /*
701  * Structure for "file execute", "file read", "file write", "file append",
702  * "file unlink", "file getattr", "file rmdir", "file truncate",
703  * "file symlink", "file chroot" and "file unmount" directive.
704  */
705 struct tomoyo_path_acl {
706         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
707         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
708         struct tomoyo_name_union name;
709 };
710 
711 /*
712  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
713  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
714  */
715 struct tomoyo_path_number_acl {
716         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
717         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
718         u8 perm;
719         struct tomoyo_name_union name;
720         struct tomoyo_number_union number;
721 };
722 
723 /* Structure for "file mkblock" and "file mkchar" directive. */
724 struct tomoyo_mkdev_acl {
725         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
726         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
727         struct tomoyo_name_union name;
728         struct tomoyo_number_union mode;
729         struct tomoyo_number_union major;
730         struct tomoyo_number_union minor;
731 };
732 
733 /*
734  * Structure for "file rename", "file link" and "file pivot_root" directive.
735  */
736 struct tomoyo_path2_acl {
737         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
738         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
739         struct tomoyo_name_union name1;
740         struct tomoyo_name_union name2;
741 };
742 
743 /* Structure for "file mount" directive. */
744 struct tomoyo_mount_acl {
745         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
746         struct tomoyo_name_union dev_name;
747         struct tomoyo_name_union dir_name;
748         struct tomoyo_name_union fs_type;
749         struct tomoyo_number_union flags;
750 };
751 
752 /* Structure for "misc env" directive in domain policy. */
753 struct tomoyo_env_acl {
754         struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
755         const struct tomoyo_path_info *env; /* environment variable */
756 };
757 
758 /* Structure for "network inet" directive. */
759 struct tomoyo_inet_acl {
760         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
761         u8 protocol;
762         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
763         struct tomoyo_ipaddr_union address;
764         struct tomoyo_number_union port;
765 };
766 
767 /* Structure for "network unix" directive. */
768 struct tomoyo_unix_acl {
769         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
770         u8 protocol;
771         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
772         struct tomoyo_name_union name;
773 };
774 
775 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
776 struct tomoyo_acl_param {
777         char *data;
778         struct list_head *list;
779         struct tomoyo_policy_namespace *ns;
780         bool is_delete;
781 };
782 
783 #define TOMOYO_MAX_IO_READ_QUEUE 64
784 
785 /*
786  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
787  * interfaces.
788  */
789 struct tomoyo_io_buffer {
790         void (*read) (struct tomoyo_io_buffer *);
791         int (*write) (struct tomoyo_io_buffer *);
792         __poll_t (*poll) (struct file *file, poll_table *wait);
793         /* Exclusive lock for this structure.   */
794         struct mutex io_sem;
795         char __user *read_user_buf;
796         size_t read_user_buf_avail;
797         struct {
798                 struct list_head *ns;
799                 struct list_head *domain;
800                 struct list_head *group;
801                 struct list_head *acl;
802                 size_t avail;
803                 unsigned int step;
804                 unsigned int query_index;
805                 u16 index;
806                 u16 cond_index;
807                 u8 acl_group_index;
808                 u8 cond_step;
809                 u8 bit;
810                 u8 w_pos;
811                 bool eof;
812                 bool print_this_domain_only;
813                 bool print_transition_related_only;
814                 bool print_cond_part;
815                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
816         } r;
817         struct {
818                 struct tomoyo_policy_namespace *ns;
819                 /* The position currently writing to.   */
820                 struct tomoyo_domain_info *domain;
821                 /* Bytes available for writing.         */
822                 size_t avail;
823                 bool is_delete;
824         } w;
825         /* Buffer for reading.                  */
826         char *read_buf;
827         /* Size of read buffer.                 */
828         size_t readbuf_size;
829         /* Buffer for writing.                  */
830         char *write_buf;
831         /* Size of write buffer.                */
832         size_t writebuf_size;
833         /* Type of this interface.              */
834         enum tomoyo_securityfs_interface_index type;
835         /* Users counter protected by tomoyo_io_buffer_list_lock. */
836         u8 users;
837         /* List for telling GC not to kfree() elements. */
838         struct list_head list;
839 };
840 
841 /*
842  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
843  * "no_keep_domain" keyword.
844  */
845 struct tomoyo_transition_control {
846         struct tomoyo_acl_head head;
847         u8 type; /* One of values in "enum tomoyo_transition_type".  */
848         /* True if the domainname is tomoyo_get_last_name(). */
849         bool is_last_name;
850         const struct tomoyo_path_info *domainname; /* Maybe NULL */
851         const struct tomoyo_path_info *program;    /* Maybe NULL */
852 };
853 
854 /* Structure for "aggregator" keyword. */
855 struct tomoyo_aggregator {
856         struct tomoyo_acl_head head;
857         const struct tomoyo_path_info *original_name;
858         const struct tomoyo_path_info *aggregated_name;
859 };
860 
861 /* Structure for policy manager. */
862 struct tomoyo_manager {
863         struct tomoyo_acl_head head;
864         /* A path to program or a domainname. */
865         const struct tomoyo_path_info *manager;
866 };
867 
868 struct tomoyo_preference {
869         unsigned int learning_max_entry;
870         bool enforcing_verbose;
871         bool learning_verbose;
872         bool permissive_verbose;
873 };
874 
875 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
876 struct tomoyo_profile {
877         const struct tomoyo_path_info *comment;
878         struct tomoyo_preference *learning;
879         struct tomoyo_preference *permissive;
880         struct tomoyo_preference *enforcing;
881         struct tomoyo_preference preference;
882         u8 default_config;
883         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
884         unsigned int pref[TOMOYO_MAX_PREF];
885 };
886 
887 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
888 struct tomoyo_time {
889         u16 year;
890         u8 month;
891         u8 day;
892         u8 hour;
893         u8 min;
894         u8 sec;
895 };
896 
897 /* Structure for policy namespace. */
898 struct tomoyo_policy_namespace {
899         /* Profile table. Memory is allocated as needed. */
900         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
901         /* List of "struct tomoyo_group". */
902         struct list_head group_list[TOMOYO_MAX_GROUP];
903         /* List of policy. */
904         struct list_head policy_list[TOMOYO_MAX_POLICY];
905         /* The global ACL referred by "use_group" keyword. */
906         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
907         /* List for connecting to tomoyo_namespace_list list. */
908         struct list_head namespace_list;
909         /* Profile version. Currently only 20110903 is defined. */
910         unsigned int profile_version;
911         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
912         const char *name;
913 };
914 
915 /********** Function prototypes. **********/
916 
917 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
918                                   const struct tomoyo_group *group);
919 bool tomoyo_compare_number_union(const unsigned long value,
920                                  const struct tomoyo_number_union *ptr);
921 bool tomoyo_condition(struct tomoyo_request_info *r,
922                       const struct tomoyo_condition *cond);
923 bool tomoyo_correct_domain(const unsigned char *domainname);
924 bool tomoyo_correct_path(const char *filename);
925 bool tomoyo_correct_word(const char *string);
926 bool tomoyo_domain_def(const unsigned char *buffer);
927 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
928 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
929                       struct tomoyo_page_dump *dump);
930 bool tomoyo_memory_ok(void *ptr);
931 bool tomoyo_number_matches_group(const unsigned long min,
932                                  const unsigned long max,
933                                  const struct tomoyo_group *group);
934 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
935                                struct tomoyo_ipaddr_union *ptr);
936 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
937                              struct tomoyo_name_union *ptr);
938 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
939                                struct tomoyo_number_union *ptr);
940 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
941                                  const struct tomoyo_path_info *pattern);
942 bool tomoyo_permstr(const char *string, const char *keyword);
943 bool tomoyo_str_starts(char **src, const char *find);
944 char *tomoyo_encode(const char *str);
945 char *tomoyo_encode2(const char *str, int str_len);
946 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
947                       va_list args);
948 char *tomoyo_read_token(struct tomoyo_acl_param *param);
949 char *tomoyo_realpath_from_path(const struct path *path);
950 char *tomoyo_realpath_nofollow(const char *pathname);
951 const char *tomoyo_get_exe(void);
952 const char *tomoyo_yesno(const unsigned int value);
953 const struct tomoyo_path_info *tomoyo_compare_name_union
954 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
955 const struct tomoyo_path_info *tomoyo_get_domainname
956 (struct tomoyo_acl_param *param);
957 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
958 const struct tomoyo_path_info *tomoyo_path_matches_group
959 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
960 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
961                                  const struct path *path, const int flag);
962 void tomoyo_close_control(struct tomoyo_io_buffer *head);
963 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
964 int tomoyo_execute_permission(struct tomoyo_request_info *r,
965                               const struct tomoyo_path_info *filename);
966 int tomoyo_find_next_domain(struct linux_binprm *bprm);
967 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
968                     const u8 index);
969 int tomoyo_init_request_info(struct tomoyo_request_info *r,
970                              struct tomoyo_domain_info *domain,
971                              const u8 index);
972 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
973                       const unsigned int mode, unsigned int dev);
974 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
975                             const char *type, unsigned long flags,
976                             void *data_page);
977 int tomoyo_open_control(const u8 type, struct file *file);
978 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
979                       const struct path *path2);
980 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
981                             unsigned long number);
982 int tomoyo_path_perm(const u8 operation, const struct path *path,
983                      const char *target);
984 __poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
985 __poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
986 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
987                                   int addr_len);
988 int tomoyo_socket_connect_permission(struct socket *sock,
989                                      struct sockaddr *addr, int addr_len);
990 int tomoyo_socket_listen_permission(struct socket *sock);
991 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
992                                      int size);
993 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
994         __printf(2, 3);
995 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
996                          struct tomoyo_acl_param *param,
997                          bool (*check_duplicate)
998                          (const struct tomoyo_acl_info *,
999                           const struct tomoyo_acl_info *),
1000                          bool (*merge_duplicate)
1001                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1002                           const bool));
1003 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1004                          struct tomoyo_acl_param *param,
1005                          bool (*check_duplicate)
1006                          (const struct tomoyo_acl_head *,
1007                           const struct tomoyo_acl_head *));
1008 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1009 int tomoyo_write_file(struct tomoyo_acl_param *param);
1010 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1011 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1012 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1013 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1014                                     const u8 type);
1015 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1016 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1017                             const int buffer_len);
1018 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1019                              const char __user *buffer, const int buffer_len);
1020 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1021 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1022                                                 const bool transit);
1023 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1024 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1025                                       const u8 idx);
1026 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1027 (const char *domainname);
1028 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1029                                       const u8 profile);
1030 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1031                                 const u8 index);
1032 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1033 void *tomoyo_commit_ok(void *data, const unsigned int size);
1034 void __init tomoyo_load_builtin_policy(void);
1035 void __init tomoyo_mm_init(void);
1036 void tomoyo_check_acl(struct tomoyo_request_info *r,
1037                       bool (*check_entry) (struct tomoyo_request_info *,
1038                                            const struct tomoyo_acl_info *));
1039 void tomoyo_check_profile(void);
1040 void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1041 void tomoyo_del_condition(struct list_head *element);
1042 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1043 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1044 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1045 void tomoyo_load_policy(const char *filename);
1046 void tomoyo_normalize_line(unsigned char *buffer);
1047 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1048 void tomoyo_print_ip(char *buf, const unsigned int size,
1049                      const struct tomoyo_ipaddr_union *ptr);
1050 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1051                         const unsigned long value, const u8 type);
1052 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1053 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1054 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1055 void tomoyo_update_stat(const u8 index);
1056 void tomoyo_warn_oom(const char *function);
1057 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1058         __printf(2, 3);
1059 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1060                        va_list args);
1061 
1062 /********** External variable definitions. **********/
1063 
1064 extern bool tomoyo_policy_loaded;
1065 extern const char * const tomoyo_condition_keyword
1066 [TOMOYO_MAX_CONDITION_KEYWORD];
1067 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1068 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1069                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1070 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1071 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1072 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1073 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1074 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1075 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1076 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1077 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1078 extern struct list_head tomoyo_condition_list;
1079 extern struct list_head tomoyo_domain_list;
1080 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1081 extern struct list_head tomoyo_namespace_list;
1082 extern struct mutex tomoyo_policy_lock;
1083 extern struct srcu_struct tomoyo_ss;
1084 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1085 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1086 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1087 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1088 
1089 /********** Inlined functions. **********/
1090 
1091 /**
1092  * tomoyo_read_lock - Take lock for protecting policy.
1093  *
1094  * Returns index number for tomoyo_read_unlock().
1095  */
1096 static inline int tomoyo_read_lock(void)
1097 {
1098         return srcu_read_lock(&tomoyo_ss);
1099 }
1100 
1101 /**
1102  * tomoyo_read_unlock - Release lock for protecting policy.
1103  *
1104  * @idx: Index number returned by tomoyo_read_lock().
1105  *
1106  * Returns nothing.
1107  */
1108 static inline void tomoyo_read_unlock(int idx)
1109 {
1110         srcu_read_unlock(&tomoyo_ss, idx);
1111 }
1112 
1113 /**
1114  * tomoyo_sys_getppid - Copy of getppid().
1115  *
1116  * Returns parent process's PID.
1117  *
1118  * Alpha does not have getppid() defined. To be able to build this module on
1119  * Alpha, I have to copy getppid() from kernel/timer.c.
1120  */
1121 static inline pid_t tomoyo_sys_getppid(void)
1122 {
1123         pid_t pid;
1124         rcu_read_lock();
1125         pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1126         rcu_read_unlock();
1127         return pid;
1128 }
1129 
1130 /**
1131  * tomoyo_sys_getpid - Copy of getpid().
1132  *
1133  * Returns current thread's PID.
1134  *
1135  * Alpha does not have getpid() defined. To be able to build this module on
1136  * Alpha, I have to copy getpid() from kernel/timer.c.
1137  */
1138 static inline pid_t tomoyo_sys_getpid(void)
1139 {
1140         return task_tgid_vnr(current);
1141 }
1142 
1143 /**
1144  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1145  *
1146  * @a: Pointer to "struct tomoyo_path_info".
1147  * @b: Pointer to "struct tomoyo_path_info".
1148  *
1149  * Returns true if @a == @b, false otherwise.
1150  */
1151 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1152                                   const struct tomoyo_path_info *b)
1153 {
1154         return a->hash != b->hash || strcmp(a->name, b->name);
1155 }
1156 
1157 /**
1158  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1159  *
1160  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1161  *
1162  * Returns nothing.
1163  */
1164 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1165 {
1166         if (name) {
1167                 struct tomoyo_name *ptr =
1168                         container_of(name, typeof(*ptr), entry);
1169                 atomic_dec(&ptr->head.users);
1170         }
1171 }
1172 
1173 /**
1174  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1175  *
1176  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1177  *
1178  * Returns nothing.
1179  */
1180 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1181 {
1182         if (cond)
1183                 atomic_dec(&cond->head.users);
1184 }
1185 
1186 /**
1187  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1188  *
1189  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1190  *
1191  * Returns nothing.
1192  */
1193 static inline void tomoyo_put_group(struct tomoyo_group *group)
1194 {
1195         if (group)
1196                 atomic_dec(&group->head.users);
1197 }
1198 
1199 /**
1200  * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
1201  *
1202  * Returns pointer to "struct tomoyo_domain_info" for current thread.
1203  */
1204 static inline struct tomoyo_domain_info *tomoyo_domain(void)
1205 {
1206         return current_cred()->security;
1207 }
1208 
1209 /**
1210  * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
1211  *
1212  * @task: Pointer to "struct task_struct".
1213  *
1214  * Returns pointer to "struct tomoyo_security" for specified thread.
1215  */
1216 static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
1217                                                             *task)
1218 {
1219         return task_cred_xxx(task, security);
1220 }
1221 
1222 /**
1223  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1224  *
1225  * @a: Pointer to "struct tomoyo_name_union".
1226  * @b: Pointer to "struct tomoyo_name_union".
1227  *
1228  * Returns true if @a == @b, false otherwise.
1229  */
1230 static inline bool tomoyo_same_name_union
1231 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1232 {
1233         return a->filename == b->filename && a->group == b->group;
1234 }
1235 
1236 /**
1237  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1238  *
1239  * @a: Pointer to "struct tomoyo_number_union".
1240  * @b: Pointer to "struct tomoyo_number_union".
1241  *
1242  * Returns true if @a == @b, false otherwise.
1243  */
1244 static inline bool tomoyo_same_number_union
1245 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1246 {
1247         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1248                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1249                 a->value_type[1] == b->value_type[1];
1250 }
1251 
1252 /**
1253  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1254  *
1255  * @a: Pointer to "struct tomoyo_ipaddr_union".
1256  * @b: Pointer to "struct tomoyo_ipaddr_union".
1257  *
1258  * Returns true if @a == @b, false otherwise.
1259  */
1260 static inline bool tomoyo_same_ipaddr_union
1261 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1262 {
1263         return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1264                 a->is_ipv6 == b->is_ipv6;
1265 }
1266 
1267 /**
1268  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1269  *
1270  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1271  */
1272 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1273 {
1274         return tomoyo_domain()->ns;
1275 }
1276 
1277 #if defined(CONFIG_SLOB)
1278 
1279 /**
1280  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1281  *
1282  * @size: Size to be rounded up.
1283  *
1284  * Returns @size.
1285  *
1286  * Since SLOB does not round up, this function simply returns @size.
1287  */
1288 static inline int tomoyo_round2(size_t size)
1289 {
1290         return size;
1291 }
1292 
1293 #else
1294 
1295 /**
1296  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1297  *
1298  * @size: Size to be rounded up.
1299  *
1300  * Returns rounded size.
1301  *
1302  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1303  * (e.g.) 128 bytes.
1304  */
1305 static inline int tomoyo_round2(size_t size)
1306 {
1307 #if PAGE_SIZE == 4096
1308         size_t bsize = 32;
1309 #else
1310         size_t bsize = 64;
1311 #endif
1312         if (!size)
1313                 return 0;
1314         while (size > bsize)
1315                 bsize <<= 1;
1316         return bsize;
1317 }
1318 
1319 #endif
1320 
1321 /**
1322  * list_for_each_cookie - iterate over a list with cookie.
1323  * @pos:        the &struct list_head to use as a loop cursor.
1324  * @head:       the head for your list.
1325  */
1326 #define list_for_each_cookie(pos, head)                                 \
1327         if (!pos)                                                       \
1328                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1329         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1330 
1331 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
1332 

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