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

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.14 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.57 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.138 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.193 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ 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 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * security/tomoyo/common.h
  4  *
  5  * Header file for TOMOYO.
  6  *
  7  * Copyright (C) 2005-2011  NTT DATA CORPORATION
  8  */
  9 
 10 #ifndef _SECURITY_TOMOYO_COMMON_H
 11 #define _SECURITY_TOMOYO_COMMON_H
 12 
 13 #define pr_fmt(fmt) fmt
 14 
 15 #include <linux/ctype.h>
 16 #include <linux/string.h>
 17 #include <linux/mm.h>
 18 #include <linux/file.h>
 19 #include <linux/kmod.h>
 20 #include <linux/fs.h>
 21 #include <linux/sched.h>
 22 #include <linux/namei.h>
 23 #include <linux/mount.h>
 24 #include <linux/list.h>
 25 #include <linux/cred.h>
 26 #include <linux/poll.h>
 27 #include <linux/binfmts.h>
 28 #include <linux/highmem.h>
 29 #include <linux/net.h>
 30 #include <linux/inet.h>
 31 #include <linux/in.h>
 32 #include <linux/in6.h>
 33 #include <linux/un.h>
 34 #include <linux/lsm_hooks.h>
 35 #include <net/sock.h>
 36 #include <net/af_unix.h>
 37 #include <net/ip.h>
 38 #include <net/ipv6.h>
 39 #include <net/udp.h>
 40 
 41 /********** Constants definitions. **********/
 42 
 43 /*
 44  * TOMOYO uses this hash only when appending a string into the string
 45  * table. Frequency of appending strings is very low. So we don't need
 46  * large (e.g. 64k) hash size. 256 will be sufficient.
 47  */
 48 #define TOMOYO_HASH_BITS  8
 49 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
 50 
 51 /*
 52  * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
 53  * Therefore, we don't need SOCK_MAX.
 54  */
 55 #define TOMOYO_SOCK_MAX 6
 56 
 57 #define TOMOYO_EXEC_TMPSIZE     4096
 58 
 59 /* Garbage collector is trying to kfree() this element. */
 60 #define TOMOYO_GC_IN_PROGRESS -1
 61 
 62 /* Profile number is an integer between 0 and 255. */
 63 #define TOMOYO_MAX_PROFILES 256
 64 
 65 /* Group number is an integer between 0 and 255. */
 66 #define TOMOYO_MAX_ACL_GROUPS 256
 67 
 68 /* Index numbers for "struct tomoyo_condition". */
 69 enum tomoyo_conditions_index {
 70         TOMOYO_TASK_UID,             /* current_uid()   */
 71         TOMOYO_TASK_EUID,            /* current_euid()  */
 72         TOMOYO_TASK_SUID,            /* current_suid()  */
 73         TOMOYO_TASK_FSUID,           /* current_fsuid() */
 74         TOMOYO_TASK_GID,             /* current_gid()   */
 75         TOMOYO_TASK_EGID,            /* current_egid()  */
 76         TOMOYO_TASK_SGID,            /* current_sgid()  */
 77         TOMOYO_TASK_FSGID,           /* current_fsgid() */
 78         TOMOYO_TASK_PID,             /* sys_getpid()   */
 79         TOMOYO_TASK_PPID,            /* sys_getppid()  */
 80         TOMOYO_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
 81         TOMOYO_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
 82         TOMOYO_TYPE_IS_SOCKET,       /* S_IFSOCK */
 83         TOMOYO_TYPE_IS_SYMLINK,      /* S_IFLNK */
 84         TOMOYO_TYPE_IS_FILE,         /* S_IFREG */
 85         TOMOYO_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
 86         TOMOYO_TYPE_IS_DIRECTORY,    /* S_IFDIR */
 87         TOMOYO_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
 88         TOMOYO_TYPE_IS_FIFO,         /* S_IFIFO */
 89         TOMOYO_MODE_SETUID,          /* S_ISUID */
 90         TOMOYO_MODE_SETGID,          /* S_ISGID */
 91         TOMOYO_MODE_STICKY,          /* S_ISVTX */
 92         TOMOYO_MODE_OWNER_READ,      /* S_IRUSR */
 93         TOMOYO_MODE_OWNER_WRITE,     /* S_IWUSR */
 94         TOMOYO_MODE_OWNER_EXECUTE,   /* S_IXUSR */
 95         TOMOYO_MODE_GROUP_READ,      /* S_IRGRP */
 96         TOMOYO_MODE_GROUP_WRITE,     /* S_IWGRP */
 97         TOMOYO_MODE_GROUP_EXECUTE,   /* S_IXGRP */
 98         TOMOYO_MODE_OTHERS_READ,     /* S_IROTH */
 99         TOMOYO_MODE_OTHERS_WRITE,    /* S_IWOTH */
100         TOMOYO_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
101         TOMOYO_EXEC_REALPATH,
102         TOMOYO_SYMLINK_TARGET,
103         TOMOYO_PATH1_UID,
104         TOMOYO_PATH1_GID,
105         TOMOYO_PATH1_INO,
106         TOMOYO_PATH1_MAJOR,
107         TOMOYO_PATH1_MINOR,
108         TOMOYO_PATH1_PERM,
109         TOMOYO_PATH1_TYPE,
110         TOMOYO_PATH1_DEV_MAJOR,
111         TOMOYO_PATH1_DEV_MINOR,
112         TOMOYO_PATH2_UID,
113         TOMOYO_PATH2_GID,
114         TOMOYO_PATH2_INO,
115         TOMOYO_PATH2_MAJOR,
116         TOMOYO_PATH2_MINOR,
117         TOMOYO_PATH2_PERM,
118         TOMOYO_PATH2_TYPE,
119         TOMOYO_PATH2_DEV_MAJOR,
120         TOMOYO_PATH2_DEV_MINOR,
121         TOMOYO_PATH1_PARENT_UID,
122         TOMOYO_PATH1_PARENT_GID,
123         TOMOYO_PATH1_PARENT_INO,
124         TOMOYO_PATH1_PARENT_PERM,
125         TOMOYO_PATH2_PARENT_UID,
126         TOMOYO_PATH2_PARENT_GID,
127         TOMOYO_PATH2_PARENT_INO,
128         TOMOYO_PATH2_PARENT_PERM,
129         TOMOYO_MAX_CONDITION_KEYWORD,
130         TOMOYO_NUMBER_UNION,
131         TOMOYO_NAME_UNION,
132         TOMOYO_ARGV_ENTRY,
133         TOMOYO_ENVP_ENTRY,
134 };
135 
136 
137 /* Index numbers for stat(). */
138 enum tomoyo_path_stat_index {
139         /* Do not change this order. */
140         TOMOYO_PATH1,
141         TOMOYO_PATH1_PARENT,
142         TOMOYO_PATH2,
143         TOMOYO_PATH2_PARENT,
144         TOMOYO_MAX_PATH_STAT
145 };
146 
147 /* Index numbers for operation mode. */
148 enum tomoyo_mode_index {
149         TOMOYO_CONFIG_DISABLED,
150         TOMOYO_CONFIG_LEARNING,
151         TOMOYO_CONFIG_PERMISSIVE,
152         TOMOYO_CONFIG_ENFORCING,
153         TOMOYO_CONFIG_MAX_MODE,
154         TOMOYO_CONFIG_WANT_REJECT_LOG =  64,
155         TOMOYO_CONFIG_WANT_GRANT_LOG  = 128,
156         TOMOYO_CONFIG_USE_DEFAULT     = 255,
157 };
158 
159 /* Index numbers for entry type. */
160 enum tomoyo_policy_id {
161         TOMOYO_ID_GROUP,
162         TOMOYO_ID_ADDRESS_GROUP,
163         TOMOYO_ID_PATH_GROUP,
164         TOMOYO_ID_NUMBER_GROUP,
165         TOMOYO_ID_TRANSITION_CONTROL,
166         TOMOYO_ID_AGGREGATOR,
167         TOMOYO_ID_MANAGER,
168         TOMOYO_ID_CONDITION,
169         TOMOYO_ID_NAME,
170         TOMOYO_ID_ACL,
171         TOMOYO_ID_DOMAIN,
172         TOMOYO_MAX_POLICY
173 };
174 
175 /* Index numbers for domain's attributes. */
176 enum tomoyo_domain_info_flags_index {
177         /* Quota warnning flag.   */
178         TOMOYO_DIF_QUOTA_WARNED,
179         /*
180          * This domain was unable to create a new domain at
181          * tomoyo_find_next_domain() because the name of the domain to be
182          * created was too long or it could not allocate memory.
183          * More than one process continued execve() without domain transition.
184          */
185         TOMOYO_DIF_TRANSITION_FAILED,
186         TOMOYO_MAX_DOMAIN_INFO_FLAGS
187 };
188 
189 /* Index numbers for audit type. */
190 enum tomoyo_grant_log {
191         /* Follow profile's configuration. */
192         TOMOYO_GRANTLOG_AUTO,
193         /* Do not generate grant log. */
194         TOMOYO_GRANTLOG_NO,
195         /* Generate grant_log. */
196         TOMOYO_GRANTLOG_YES,
197 };
198 
199 /* Index numbers for group entries. */
200 enum tomoyo_group_id {
201         TOMOYO_PATH_GROUP,
202         TOMOYO_NUMBER_GROUP,
203         TOMOYO_ADDRESS_GROUP,
204         TOMOYO_MAX_GROUP
205 };
206 
207 /* Index numbers for type of numeric values. */
208 enum tomoyo_value_type {
209         TOMOYO_VALUE_TYPE_INVALID,
210         TOMOYO_VALUE_TYPE_DECIMAL,
211         TOMOYO_VALUE_TYPE_OCTAL,
212         TOMOYO_VALUE_TYPE_HEXADECIMAL,
213 };
214 
215 /* Index numbers for domain transition control keywords. */
216 enum tomoyo_transition_type {
217         /* Do not change this order, */
218         TOMOYO_TRANSITION_CONTROL_NO_RESET,
219         TOMOYO_TRANSITION_CONTROL_RESET,
220         TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
221         TOMOYO_TRANSITION_CONTROL_INITIALIZE,
222         TOMOYO_TRANSITION_CONTROL_NO_KEEP,
223         TOMOYO_TRANSITION_CONTROL_KEEP,
224         TOMOYO_MAX_TRANSITION_TYPE
225 };
226 
227 /* Index numbers for Access Controls. */
228 enum tomoyo_acl_entry_type_index {
229         TOMOYO_TYPE_PATH_ACL,
230         TOMOYO_TYPE_PATH2_ACL,
231         TOMOYO_TYPE_PATH_NUMBER_ACL,
232         TOMOYO_TYPE_MKDEV_ACL,
233         TOMOYO_TYPE_MOUNT_ACL,
234         TOMOYO_TYPE_INET_ACL,
235         TOMOYO_TYPE_UNIX_ACL,
236         TOMOYO_TYPE_ENV_ACL,
237         TOMOYO_TYPE_MANUAL_TASK_ACL,
238 };
239 
240 /* Index numbers for access controls with one pathname. */
241 enum tomoyo_path_acl_index {
242         TOMOYO_TYPE_EXECUTE,
243         TOMOYO_TYPE_READ,
244         TOMOYO_TYPE_WRITE,
245         TOMOYO_TYPE_APPEND,
246         TOMOYO_TYPE_UNLINK,
247         TOMOYO_TYPE_GETATTR,
248         TOMOYO_TYPE_RMDIR,
249         TOMOYO_TYPE_TRUNCATE,
250         TOMOYO_TYPE_SYMLINK,
251         TOMOYO_TYPE_CHROOT,
252         TOMOYO_TYPE_UMOUNT,
253         TOMOYO_MAX_PATH_OPERATION
254 };
255 
256 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
257 enum tomoyo_memory_stat_type {
258         TOMOYO_MEMORY_POLICY,
259         TOMOYO_MEMORY_AUDIT,
260         TOMOYO_MEMORY_QUERY,
261         TOMOYO_MAX_MEMORY_STAT
262 };
263 
264 enum tomoyo_mkdev_acl_index {
265         TOMOYO_TYPE_MKBLOCK,
266         TOMOYO_TYPE_MKCHAR,
267         TOMOYO_MAX_MKDEV_OPERATION
268 };
269 
270 /* Index numbers for socket operations. */
271 enum tomoyo_network_acl_index {
272         TOMOYO_NETWORK_BIND,    /* bind() operation. */
273         TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
274         TOMOYO_NETWORK_CONNECT, /* connect() operation. */
275         TOMOYO_NETWORK_SEND,    /* send() operation. */
276         TOMOYO_MAX_NETWORK_OPERATION
277 };
278 
279 /* Index numbers for access controls with two pathnames. */
280 enum tomoyo_path2_acl_index {
281         TOMOYO_TYPE_LINK,
282         TOMOYO_TYPE_RENAME,
283         TOMOYO_TYPE_PIVOT_ROOT,
284         TOMOYO_MAX_PATH2_OPERATION
285 };
286 
287 /* Index numbers for access controls with one pathname and one number. */
288 enum tomoyo_path_number_acl_index {
289         TOMOYO_TYPE_CREATE,
290         TOMOYO_TYPE_MKDIR,
291         TOMOYO_TYPE_MKFIFO,
292         TOMOYO_TYPE_MKSOCK,
293         TOMOYO_TYPE_IOCTL,
294         TOMOYO_TYPE_CHMOD,
295         TOMOYO_TYPE_CHOWN,
296         TOMOYO_TYPE_CHGRP,
297         TOMOYO_MAX_PATH_NUMBER_OPERATION
298 };
299 
300 /* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
301 enum tomoyo_securityfs_interface_index {
302         TOMOYO_DOMAINPOLICY,
303         TOMOYO_EXCEPTIONPOLICY,
304         TOMOYO_PROCESS_STATUS,
305         TOMOYO_STAT,
306         TOMOYO_AUDIT,
307         TOMOYO_VERSION,
308         TOMOYO_PROFILE,
309         TOMOYO_QUERY,
310         TOMOYO_MANAGER
311 };
312 
313 /* Index numbers for special mount operations. */
314 enum tomoyo_special_mount {
315         TOMOYO_MOUNT_BIND,            /* mount --bind /source /dest   */
316         TOMOYO_MOUNT_MOVE,            /* mount --move /old /new       */
317         TOMOYO_MOUNT_REMOUNT,         /* mount -o remount /dir        */
318         TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
319         TOMOYO_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
320         TOMOYO_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
321         TOMOYO_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
322         TOMOYO_MAX_SPECIAL_MOUNT
323 };
324 
325 /* Index numbers for functionality. */
326 enum tomoyo_mac_index {
327         TOMOYO_MAC_FILE_EXECUTE,
328         TOMOYO_MAC_FILE_OPEN,
329         TOMOYO_MAC_FILE_CREATE,
330         TOMOYO_MAC_FILE_UNLINK,
331         TOMOYO_MAC_FILE_GETATTR,
332         TOMOYO_MAC_FILE_MKDIR,
333         TOMOYO_MAC_FILE_RMDIR,
334         TOMOYO_MAC_FILE_MKFIFO,
335         TOMOYO_MAC_FILE_MKSOCK,
336         TOMOYO_MAC_FILE_TRUNCATE,
337         TOMOYO_MAC_FILE_SYMLINK,
338         TOMOYO_MAC_FILE_MKBLOCK,
339         TOMOYO_MAC_FILE_MKCHAR,
340         TOMOYO_MAC_FILE_LINK,
341         TOMOYO_MAC_FILE_RENAME,
342         TOMOYO_MAC_FILE_CHMOD,
343         TOMOYO_MAC_FILE_CHOWN,
344         TOMOYO_MAC_FILE_CHGRP,
345         TOMOYO_MAC_FILE_IOCTL,
346         TOMOYO_MAC_FILE_CHROOT,
347         TOMOYO_MAC_FILE_MOUNT,
348         TOMOYO_MAC_FILE_UMOUNT,
349         TOMOYO_MAC_FILE_PIVOT_ROOT,
350         TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
351         TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
352         TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
353         TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
354         TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
355         TOMOYO_MAC_NETWORK_INET_RAW_BIND,
356         TOMOYO_MAC_NETWORK_INET_RAW_SEND,
357         TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
358         TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
359         TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
360         TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
361         TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
362         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
363         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
364         TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
365         TOMOYO_MAC_ENVIRON,
366         TOMOYO_MAX_MAC_INDEX
367 };
368 
369 /* Index numbers for category of functionality. */
370 enum tomoyo_mac_category_index {
371         TOMOYO_MAC_CATEGORY_FILE,
372         TOMOYO_MAC_CATEGORY_NETWORK,
373         TOMOYO_MAC_CATEGORY_MISC,
374         TOMOYO_MAX_MAC_CATEGORY_INDEX
375 };
376 
377 /*
378  * Retry this request. Returned by tomoyo_supervisor() if policy violation has
379  * occurred in enforcing mode and the userspace daemon decided to retry.
380  *
381  * We must choose a positive value in order to distinguish "granted" (which is
382  * 0) and "rejected" (which is a negative value) and "retry".
383  */
384 #define TOMOYO_RETRY_REQUEST 1
385 
386 /* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
387 enum tomoyo_policy_stat_type {
388         /* Do not change this order. */
389         TOMOYO_STAT_POLICY_UPDATES,
390         TOMOYO_STAT_POLICY_LEARNING,   /* == TOMOYO_CONFIG_LEARNING */
391         TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
392         TOMOYO_STAT_POLICY_ENFORCING,  /* == TOMOYO_CONFIG_ENFORCING */
393         TOMOYO_MAX_POLICY_STAT
394 };
395 
396 /* Index numbers for profile's PREFERENCE values. */
397 enum tomoyo_pref_index {
398         TOMOYO_PREF_MAX_AUDIT_LOG,
399         TOMOYO_PREF_MAX_LEARNING_ENTRY,
400         TOMOYO_MAX_PREF
401 };
402 
403 /********** Structure definitions. **********/
404 
405 /* Common header for holding ACL entries. */
406 struct tomoyo_acl_head {
407         struct list_head list;
408         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
409 } __packed;
410 
411 /* Common header for shared entries. */
412 struct tomoyo_shared_acl_head {
413         struct list_head list;
414         atomic_t users;
415 } __packed;
416 
417 struct tomoyo_policy_namespace;
418 
419 /* Structure for request info. */
420 struct tomoyo_request_info {
421         /*
422          * For holding parameters specific to operations which deal files.
423          * NULL if not dealing files.
424          */
425         struct tomoyo_obj_info *obj;
426         /*
427          * For holding parameters specific to execve() request.
428          * NULL if not dealing do_execve().
429          */
430         struct tomoyo_execve *ee;
431         struct tomoyo_domain_info *domain;
432         /* For holding parameters. */
433         union {
434                 struct {
435                         const struct tomoyo_path_info *filename;
436                         /* For using wildcards at tomoyo_find_next_domain(). */
437                         const struct tomoyo_path_info *matched_path;
438                         /* One of values in "enum tomoyo_path_acl_index". */
439                         u8 operation;
440                 } path;
441                 struct {
442                         const struct tomoyo_path_info *filename1;
443                         const struct tomoyo_path_info *filename2;
444                         /* One of values in "enum tomoyo_path2_acl_index". */
445                         u8 operation;
446                 } path2;
447                 struct {
448                         const struct tomoyo_path_info *filename;
449                         unsigned int mode;
450                         unsigned int major;
451                         unsigned int minor;
452                         /* One of values in "enum tomoyo_mkdev_acl_index". */
453                         u8 operation;
454                 } mkdev;
455                 struct {
456                         const struct tomoyo_path_info *filename;
457                         unsigned long number;
458                         /*
459                          * One of values in
460                          * "enum tomoyo_path_number_acl_index".
461                          */
462                         u8 operation;
463                 } path_number;
464                 struct {
465                         const struct tomoyo_path_info *name;
466                 } environ;
467                 struct {
468                         const __be32 *address;
469                         u16 port;
470                         /* One of values smaller than TOMOYO_SOCK_MAX. */
471                         u8 protocol;
472                         /* One of values in "enum tomoyo_network_acl_index". */
473                         u8 operation;
474                         bool is_ipv6;
475                 } inet_network;
476                 struct {
477                         const struct tomoyo_path_info *address;
478                         /* One of values smaller than TOMOYO_SOCK_MAX. */
479                         u8 protocol;
480                         /* One of values in "enum tomoyo_network_acl_index". */
481                         u8 operation;
482                 } unix_network;
483                 struct {
484                         const struct tomoyo_path_info *type;
485                         const struct tomoyo_path_info *dir;
486                         const struct tomoyo_path_info *dev;
487                         unsigned long flags;
488                         int need_dev;
489                 } mount;
490                 struct {
491                         const struct tomoyo_path_info *domainname;
492                 } task;
493         } param;
494         struct tomoyo_acl_info *matched_acl;
495         u8 param_type;
496         bool granted;
497         u8 retry;
498         u8 profile;
499         u8 mode; /* One of tomoyo_mode_index . */
500         u8 type;
501 };
502 
503 /* Structure for holding a token. */
504 struct tomoyo_path_info {
505         const char *name;
506         u32 hash;          /* = full_name_hash(name, strlen(name)) */
507         u16 const_len;     /* = tomoyo_const_part_length(name)     */
508         bool is_dir;       /* = tomoyo_strendswith(name, "/")      */
509         bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
510 };
511 
512 /* Structure for holding string data. */
513 struct tomoyo_name {
514         struct tomoyo_shared_acl_head head;
515         struct tomoyo_path_info entry;
516 };
517 
518 /* Structure for holding a word. */
519 struct tomoyo_name_union {
520         /* Either @filename or @group is NULL. */
521         const struct tomoyo_path_info *filename;
522         struct tomoyo_group *group;
523 };
524 
525 /* Structure for holding a number. */
526 struct tomoyo_number_union {
527         unsigned long values[2];
528         struct tomoyo_group *group; /* Maybe NULL. */
529         /* One of values in "enum tomoyo_value_type". */
530         u8 value_type[2];
531 };
532 
533 /* Structure for holding an IP address. */
534 struct tomoyo_ipaddr_union {
535         struct in6_addr ip[2]; /* Big endian. */
536         struct tomoyo_group *group; /* Pointer to address group. */
537         bool is_ipv6; /* Valid only if @group == NULL. */
538 };
539 
540 /* Structure for "path_group"/"number_group"/"address_group" directive. */
541 struct tomoyo_group {
542         struct tomoyo_shared_acl_head head;
543         const struct tomoyo_path_info *group_name;
544         struct list_head member_list;
545 };
546 
547 /* Structure for "path_group" directive. */
548 struct tomoyo_path_group {
549         struct tomoyo_acl_head head;
550         const struct tomoyo_path_info *member_name;
551 };
552 
553 /* Structure for "number_group" directive. */
554 struct tomoyo_number_group {
555         struct tomoyo_acl_head head;
556         struct tomoyo_number_union number;
557 };
558 
559 /* Structure for "address_group" directive. */
560 struct tomoyo_address_group {
561         struct tomoyo_acl_head head;
562         /* Structure for holding an IP address. */
563         struct tomoyo_ipaddr_union address;
564 };
565 
566 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
567 struct tomoyo_mini_stat {
568         kuid_t uid;
569         kgid_t gid;
570         ino_t ino;
571         umode_t mode;
572         dev_t dev;
573         dev_t rdev;
574 };
575 
576 /* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
577 struct tomoyo_page_dump {
578         struct page *page;    /* Previously dumped page. */
579         char *data;           /* Contents of "page". Size is PAGE_SIZE. */
580 };
581 
582 /* Structure for attribute checks in addition to pathname checks. */
583 struct tomoyo_obj_info {
584         /*
585          * True if tomoyo_get_attributes() was already called, false otherwise.
586          */
587         bool validate_done;
588         /* True if @stat[] is valid. */
589         bool stat_valid[TOMOYO_MAX_PATH_STAT];
590         /* First pathname. Initialized with { NULL, NULL } if no path. */
591         struct path path1;
592         /* Second pathname. Initialized with { NULL, NULL } if no path. */
593         struct path path2;
594         /*
595          * Information on @path1, @path1's parent directory, @path2, @path2's
596          * parent directory.
597          */
598         struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
599         /*
600          * Content of symbolic link to be created. NULL for operations other
601          * than symlink().
602          */
603         struct tomoyo_path_info *symlink_target;
604 };
605 
606 /* Structure for argv[]. */
607 struct tomoyo_argv {
608         unsigned long index;
609         const struct tomoyo_path_info *value;
610         bool is_not;
611 };
612 
613 /* Structure for envp[]. */
614 struct tomoyo_envp {
615         const struct tomoyo_path_info *name;
616         const struct tomoyo_path_info *value;
617         bool is_not;
618 };
619 
620 /* Structure for execve() operation. */
621 struct tomoyo_execve {
622         struct tomoyo_request_info r;
623         struct tomoyo_obj_info obj;
624         struct linux_binprm *bprm;
625         const struct tomoyo_path_info *transition;
626         /* For dumping argv[] and envp[]. */
627         struct tomoyo_page_dump dump;
628         /* For temporary use. */
629         char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
630 };
631 
632 /* Structure for entries which follows "struct tomoyo_condition". */
633 struct tomoyo_condition_element {
634         /*
635          * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
636          * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
637          * of the array of this struct.
638          */
639         u8 left;
640         /*
641          * Right hand operand. A "struct tomoyo_number_union" for
642          * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
643          * TOMOYO_NAME_UNION is attached to the tail of the array of this
644          * struct.
645          */
646         u8 right;
647         /* Equation operator. True if equals or overlaps, false otherwise. */
648         bool equals;
649 };
650 
651 /* Structure for optional arguments. */
652 struct tomoyo_condition {
653         struct tomoyo_shared_acl_head head;
654         u32 size; /* Memory size allocated for this entry. */
655         u16 condc; /* Number of conditions in this struct. */
656         u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
657         u16 names_count; /* Number of "struct tomoyo_name_union names". */
658         u16 argc; /* Number of "struct tomoyo_argv". */
659         u16 envc; /* Number of "struct tomoyo_envp". */
660         u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
661         const struct tomoyo_path_info *transit; /* Maybe NULL. */
662         /*
663          * struct tomoyo_condition_element condition[condc];
664          * struct tomoyo_number_union values[numbers_count];
665          * struct tomoyo_name_union names[names_count];
666          * struct tomoyo_argv argv[argc];
667          * struct tomoyo_envp envp[envc];
668          */
669 };
670 
671 /* Common header for individual entries. */
672 struct tomoyo_acl_info {
673         struct list_head list;
674         struct tomoyo_condition *cond; /* Maybe NULL. */
675         s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
676         u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
677 } __packed;
678 
679 /* Structure for domain information. */
680 struct tomoyo_domain_info {
681         struct list_head list;
682         struct list_head acl_info_list;
683         /* Name of this domain. Never NULL.          */
684         const struct tomoyo_path_info *domainname;
685         /* Namespace for this domain. Never NULL. */
686         struct tomoyo_policy_namespace *ns;
687         /* Group numbers to use.   */
688         unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
689         u8 profile;        /* Profile number to use. */
690         bool is_deleted;   /* Delete flag.           */
691         bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
692         atomic_t users; /* Number of referring tasks. */
693 };
694 
695 /*
696  * Structure for "task manual_domain_transition" directive.
697  */
698 struct tomoyo_task_acl {
699         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
700         /* Pointer to domainname. */
701         const struct tomoyo_path_info *domainname;
702 };
703 
704 /*
705  * Structure for "file execute", "file read", "file write", "file append",
706  * "file unlink", "file getattr", "file rmdir", "file truncate",
707  * "file symlink", "file chroot" and "file unmount" directive.
708  */
709 struct tomoyo_path_acl {
710         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
711         u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
712         struct tomoyo_name_union name;
713 };
714 
715 /*
716  * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
717  * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
718  */
719 struct tomoyo_path_number_acl {
720         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
721         /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
722         u8 perm;
723         struct tomoyo_name_union name;
724         struct tomoyo_number_union number;
725 };
726 
727 /* Structure for "file mkblock" and "file mkchar" directive. */
728 struct tomoyo_mkdev_acl {
729         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
730         u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
731         struct tomoyo_name_union name;
732         struct tomoyo_number_union mode;
733         struct tomoyo_number_union major;
734         struct tomoyo_number_union minor;
735 };
736 
737 /*
738  * Structure for "file rename", "file link" and "file pivot_root" directive.
739  */
740 struct tomoyo_path2_acl {
741         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
742         u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
743         struct tomoyo_name_union name1;
744         struct tomoyo_name_union name2;
745 };
746 
747 /* Structure for "file mount" directive. */
748 struct tomoyo_mount_acl {
749         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
750         struct tomoyo_name_union dev_name;
751         struct tomoyo_name_union dir_name;
752         struct tomoyo_name_union fs_type;
753         struct tomoyo_number_union flags;
754 };
755 
756 /* Structure for "misc env" directive in domain policy. */
757 struct tomoyo_env_acl {
758         struct tomoyo_acl_info head;        /* type = TOMOYO_TYPE_ENV_ACL  */
759         const struct tomoyo_path_info *env; /* environment variable */
760 };
761 
762 /* Structure for "network inet" directive. */
763 struct tomoyo_inet_acl {
764         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
765         u8 protocol;
766         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
767         struct tomoyo_ipaddr_union address;
768         struct tomoyo_number_union port;
769 };
770 
771 /* Structure for "network unix" directive. */
772 struct tomoyo_unix_acl {
773         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
774         u8 protocol;
775         u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
776         struct tomoyo_name_union name;
777 };
778 
779 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
780 struct tomoyo_acl_param {
781         char *data;
782         struct list_head *list;
783         struct tomoyo_policy_namespace *ns;
784         bool is_delete;
785 };
786 
787 #define TOMOYO_MAX_IO_READ_QUEUE 64
788 
789 /*
790  * Structure for reading/writing policy via /sys/kernel/security/tomoyo
791  * interfaces.
792  */
793 struct tomoyo_io_buffer {
794         void (*read)(struct tomoyo_io_buffer *head);
795         int (*write)(struct tomoyo_io_buffer *head);
796         __poll_t (*poll)(struct file *file, poll_table *wait);
797         /* Exclusive lock for this structure.   */
798         struct mutex io_sem;
799         char __user *read_user_buf;
800         size_t read_user_buf_avail;
801         struct {
802                 struct list_head *ns;
803                 struct list_head *domain;
804                 struct list_head *group;
805                 struct list_head *acl;
806                 size_t avail;
807                 unsigned int step;
808                 unsigned int query_index;
809                 u16 index;
810                 u16 cond_index;
811                 u8 acl_group_index;
812                 u8 cond_step;
813                 u8 bit;
814                 u8 w_pos;
815                 bool eof;
816                 bool print_this_domain_only;
817                 bool print_transition_related_only;
818                 bool print_cond_part;
819                 const char *w[TOMOYO_MAX_IO_READ_QUEUE];
820         } r;
821         struct {
822                 struct tomoyo_policy_namespace *ns;
823                 /* The position currently writing to.   */
824                 struct tomoyo_domain_info *domain;
825                 /* Bytes available for writing.         */
826                 size_t avail;
827                 bool is_delete;
828         } w;
829         /* Buffer for reading.                  */
830         char *read_buf;
831         /* Size of read buffer.                 */
832         size_t readbuf_size;
833         /* Buffer for writing.                  */
834         char *write_buf;
835         /* Size of write buffer.                */
836         size_t writebuf_size;
837         /* Type of this interface.              */
838         enum tomoyo_securityfs_interface_index type;
839         /* Users counter protected by tomoyo_io_buffer_list_lock. */
840         u8 users;
841         /* List for telling GC not to kfree() elements. */
842         struct list_head list;
843 };
844 
845 /*
846  * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
847  * "no_keep_domain" keyword.
848  */
849 struct tomoyo_transition_control {
850         struct tomoyo_acl_head head;
851         u8 type; /* One of values in "enum tomoyo_transition_type".  */
852         /* True if the domainname is tomoyo_get_last_name(). */
853         bool is_last_name;
854         const struct tomoyo_path_info *domainname; /* Maybe NULL */
855         const struct tomoyo_path_info *program;    /* Maybe NULL */
856 };
857 
858 /* Structure for "aggregator" keyword. */
859 struct tomoyo_aggregator {
860         struct tomoyo_acl_head head;
861         const struct tomoyo_path_info *original_name;
862         const struct tomoyo_path_info *aggregated_name;
863 };
864 
865 /* Structure for policy manager. */
866 struct tomoyo_manager {
867         struct tomoyo_acl_head head;
868         /* A path to program or a domainname. */
869         const struct tomoyo_path_info *manager;
870 };
871 
872 struct tomoyo_preference {
873         unsigned int learning_max_entry;
874         bool enforcing_verbose;
875         bool learning_verbose;
876         bool permissive_verbose;
877 };
878 
879 /* Structure for /sys/kernel/security/tomnoyo/profile interface. */
880 struct tomoyo_profile {
881         const struct tomoyo_path_info *comment;
882         struct tomoyo_preference *learning;
883         struct tomoyo_preference *permissive;
884         struct tomoyo_preference *enforcing;
885         struct tomoyo_preference preference;
886         u8 default_config;
887         u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
888         unsigned int pref[TOMOYO_MAX_PREF];
889 };
890 
891 /* Structure for representing YYYY/MM/DD hh/mm/ss. */
892 struct tomoyo_time {
893         u16 year;
894         u8 month;
895         u8 day;
896         u8 hour;
897         u8 min;
898         u8 sec;
899 };
900 
901 /* Structure for policy namespace. */
902 struct tomoyo_policy_namespace {
903         /* Profile table. Memory is allocated as needed. */
904         struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
905         /* List of "struct tomoyo_group". */
906         struct list_head group_list[TOMOYO_MAX_GROUP];
907         /* List of policy. */
908         struct list_head policy_list[TOMOYO_MAX_POLICY];
909         /* The global ACL referred by "use_group" keyword. */
910         struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
911         /* List for connecting to tomoyo_namespace_list list. */
912         struct list_head namespace_list;
913         /* Profile version. Currently only 20150505 is defined. */
914         unsigned int profile_version;
915         /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
916         const char *name;
917 };
918 
919 /* Structure for "struct task_struct"->security. */
920 struct tomoyo_task {
921         struct tomoyo_domain_info *domain_info;
922         struct tomoyo_domain_info *old_domain_info;
923 };
924 
925 /********** Function prototypes. **********/
926 
927 bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
928                                   const struct tomoyo_group *group);
929 bool tomoyo_compare_number_union(const unsigned long value,
930                                  const struct tomoyo_number_union *ptr);
931 bool tomoyo_condition(struct tomoyo_request_info *r,
932                       const struct tomoyo_condition *cond);
933 bool tomoyo_correct_domain(const unsigned char *domainname);
934 bool tomoyo_correct_path(const char *filename);
935 bool tomoyo_correct_word(const char *string);
936 bool tomoyo_domain_def(const unsigned char *buffer);
937 bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
938 bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
939                       struct tomoyo_page_dump *dump);
940 bool tomoyo_memory_ok(void *ptr);
941 bool tomoyo_number_matches_group(const unsigned long min,
942                                  const unsigned long max,
943                                  const struct tomoyo_group *group);
944 bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
945                                struct tomoyo_ipaddr_union *ptr);
946 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
947                              struct tomoyo_name_union *ptr);
948 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
949                                struct tomoyo_number_union *ptr);
950 bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
951                                  const struct tomoyo_path_info *pattern);
952 bool tomoyo_permstr(const char *string, const char *keyword);
953 bool tomoyo_str_starts(char **src, const char *find);
954 char *tomoyo_encode(const char *str);
955 char *tomoyo_encode2(const char *str, int str_len);
956 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
957                       va_list args);
958 char *tomoyo_read_token(struct tomoyo_acl_param *param);
959 char *tomoyo_realpath_from_path(const struct path *path);
960 char *tomoyo_realpath_nofollow(const char *pathname);
961 const char *tomoyo_get_exe(void);
962 const char *tomoyo_yesno(const unsigned int value);
963 const struct tomoyo_path_info *tomoyo_compare_name_union
964 (const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
965 const struct tomoyo_path_info *tomoyo_get_domainname
966 (struct tomoyo_acl_param *param);
967 const struct tomoyo_path_info *tomoyo_get_name(const char *name);
968 const struct tomoyo_path_info *tomoyo_path_matches_group
969 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
970 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
971                                  const struct path *path, const int flag);
972 void tomoyo_close_control(struct tomoyo_io_buffer *head);
973 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
974 int tomoyo_execute_permission(struct tomoyo_request_info *r,
975                               const struct tomoyo_path_info *filename);
976 int tomoyo_find_next_domain(struct linux_binprm *bprm);
977 int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
978                     const u8 index);
979 int tomoyo_init_request_info(struct tomoyo_request_info *r,
980                              struct tomoyo_domain_info *domain,
981                              const u8 index);
982 int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
983                       const unsigned int mode, unsigned int dev);
984 int tomoyo_mount_permission(const char *dev_name, const struct path *path,
985                             const char *type, unsigned long flags,
986                             void *data_page);
987 int tomoyo_open_control(const u8 type, struct file *file);
988 int tomoyo_path2_perm(const u8 operation, const struct path *path1,
989                       const struct path *path2);
990 int tomoyo_path_number_perm(const u8 operation, const struct path *path,
991                             unsigned long number);
992 int tomoyo_path_perm(const u8 operation, const struct path *path,
993                      const char *target);
994 __poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
995 __poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
996 int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
997                                   int addr_len);
998 int tomoyo_socket_connect_permission(struct socket *sock,
999                                      struct sockaddr *addr, int addr_len);
1000 int tomoyo_socket_listen_permission(struct socket *sock);
1001 int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
1002                                      int size);
1003 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1004         __printf(2, 3);
1005 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
1006                          struct tomoyo_acl_param *param,
1007                          bool (*check_duplicate)
1008                          (const struct tomoyo_acl_info *,
1009                           const struct tomoyo_acl_info *),
1010                          bool (*merge_duplicate)
1011                          (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
1012                           const bool));
1013 int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
1014                          struct tomoyo_acl_param *param,
1015                          bool (*check_duplicate)
1016                          (const struct tomoyo_acl_head *,
1017                           const struct tomoyo_acl_head *));
1018 int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
1019 int tomoyo_write_file(struct tomoyo_acl_param *param);
1020 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
1021 int tomoyo_write_misc(struct tomoyo_acl_param *param);
1022 int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
1023 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
1024                                     const u8 type);
1025 int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
1026 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
1027                             const int buffer_len);
1028 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
1029                              const char __user *buffer, const int buffer_len);
1030 struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
1031 struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
1032                                                 const bool transit);
1033 struct tomoyo_domain_info *tomoyo_domain(void);
1034 struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
1035 struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
1036                                       const u8 idx);
1037 struct tomoyo_policy_namespace *tomoyo_assign_namespace
1038 (const char *domainname);
1039 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
1040                                       const u8 profile);
1041 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
1042                                 const u8 index);
1043 u8 tomoyo_parse_ulong(unsigned long *result, char **str);
1044 void *tomoyo_commit_ok(void *data, const unsigned int size);
1045 void __init tomoyo_load_builtin_policy(void);
1046 void __init tomoyo_mm_init(void);
1047 void tomoyo_check_acl(struct tomoyo_request_info *r,
1048                       bool (*check_entry)(struct tomoyo_request_info *,
1049                                           const struct tomoyo_acl_info *));
1050 void tomoyo_check_profile(void);
1051 void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
1052 void tomoyo_del_condition(struct list_head *element);
1053 void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
1054 void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
1055 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
1056 void tomoyo_load_policy(const char *filename);
1057 void tomoyo_normalize_line(unsigned char *buffer);
1058 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
1059 void tomoyo_print_ip(char *buf, const unsigned int size,
1060                      const struct tomoyo_ipaddr_union *ptr);
1061 void tomoyo_print_ulong(char *buffer, const int buffer_len,
1062                         const unsigned long value, const u8 type);
1063 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
1064 void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
1065 void tomoyo_read_log(struct tomoyo_io_buffer *head);
1066 void tomoyo_update_stat(const u8 index);
1067 void tomoyo_warn_oom(const char *function);
1068 void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
1069         __printf(2, 3);
1070 void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
1071                        va_list args);
1072 
1073 /********** External variable definitions. **********/
1074 
1075 extern bool tomoyo_policy_loaded;
1076 extern int tomoyo_enabled;
1077 extern const char * const tomoyo_condition_keyword
1078 [TOMOYO_MAX_CONDITION_KEYWORD];
1079 extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
1080 extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
1081                                               + TOMOYO_MAX_MAC_CATEGORY_INDEX];
1082 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
1083 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
1084 extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
1085 extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
1086 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
1087 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
1088 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
1089 extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
1090 extern struct list_head tomoyo_condition_list;
1091 extern struct list_head tomoyo_domain_list;
1092 extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
1093 extern struct list_head tomoyo_namespace_list;
1094 extern struct mutex tomoyo_policy_lock;
1095 extern struct srcu_struct tomoyo_ss;
1096 extern struct tomoyo_domain_info tomoyo_kernel_domain;
1097 extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
1098 extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
1099 extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
1100 extern struct lsm_blob_sizes tomoyo_blob_sizes;
1101 
1102 /********** Inlined functions. **********/
1103 
1104 /**
1105  * tomoyo_read_lock - Take lock for protecting policy.
1106  *
1107  * Returns index number for tomoyo_read_unlock().
1108  */
1109 static inline int tomoyo_read_lock(void)
1110 {
1111         return srcu_read_lock(&tomoyo_ss);
1112 }
1113 
1114 /**
1115  * tomoyo_read_unlock - Release lock for protecting policy.
1116  *
1117  * @idx: Index number returned by tomoyo_read_lock().
1118  *
1119  * Returns nothing.
1120  */
1121 static inline void tomoyo_read_unlock(int idx)
1122 {
1123         srcu_read_unlock(&tomoyo_ss, idx);
1124 }
1125 
1126 /**
1127  * tomoyo_sys_getppid - Copy of getppid().
1128  *
1129  * Returns parent process's PID.
1130  *
1131  * Alpha does not have getppid() defined. To be able to build this module on
1132  * Alpha, I have to copy getppid() from kernel/timer.c.
1133  */
1134 static inline pid_t tomoyo_sys_getppid(void)
1135 {
1136         pid_t pid;
1137 
1138         rcu_read_lock();
1139         pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1140         rcu_read_unlock();
1141         return pid;
1142 }
1143 
1144 /**
1145  * tomoyo_sys_getpid - Copy of getpid().
1146  *
1147  * Returns current thread's PID.
1148  *
1149  * Alpha does not have getpid() defined. To be able to build this module on
1150  * Alpha, I have to copy getpid() from kernel/timer.c.
1151  */
1152 static inline pid_t tomoyo_sys_getpid(void)
1153 {
1154         return task_tgid_vnr(current);
1155 }
1156 
1157 /**
1158  * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
1159  *
1160  * @a: Pointer to "struct tomoyo_path_info".
1161  * @b: Pointer to "struct tomoyo_path_info".
1162  *
1163  * Returns true if @a == @b, false otherwise.
1164  */
1165 static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
1166                                   const struct tomoyo_path_info *b)
1167 {
1168         return a->hash != b->hash || strcmp(a->name, b->name);
1169 }
1170 
1171 /**
1172  * tomoyo_put_name - Drop reference on "struct tomoyo_name".
1173  *
1174  * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
1175  *
1176  * Returns nothing.
1177  */
1178 static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
1179 {
1180         if (name) {
1181                 struct tomoyo_name *ptr =
1182                         container_of(name, typeof(*ptr), entry);
1183                 atomic_dec(&ptr->head.users);
1184         }
1185 }
1186 
1187 /**
1188  * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
1189  *
1190  * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
1191  *
1192  * Returns nothing.
1193  */
1194 static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
1195 {
1196         if (cond)
1197                 atomic_dec(&cond->head.users);
1198 }
1199 
1200 /**
1201  * tomoyo_put_group - Drop reference on "struct tomoyo_group".
1202  *
1203  * @group: Pointer to "struct tomoyo_group". Maybe NULL.
1204  *
1205  * Returns nothing.
1206  */
1207 static inline void tomoyo_put_group(struct tomoyo_group *group)
1208 {
1209         if (group)
1210                 atomic_dec(&group->head.users);
1211 }
1212 
1213 /**
1214  * tomoyo_task - Get "struct tomoyo_task" for specified thread.
1215  *
1216  * @task - Pointer to "struct task_struct".
1217  *
1218  * Returns pointer to "struct tomoyo_task" for specified thread.
1219  */
1220 static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
1221 {
1222         return task->security + tomoyo_blob_sizes.lbs_task;
1223 }
1224 
1225 /**
1226  * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
1227  *
1228  * @a: Pointer to "struct tomoyo_name_union".
1229  * @b: Pointer to "struct tomoyo_name_union".
1230  *
1231  * Returns true if @a == @b, false otherwise.
1232  */
1233 static inline bool tomoyo_same_name_union
1234 (const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
1235 {
1236         return a->filename == b->filename && a->group == b->group;
1237 }
1238 
1239 /**
1240  * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
1241  *
1242  * @a: Pointer to "struct tomoyo_number_union".
1243  * @b: Pointer to "struct tomoyo_number_union".
1244  *
1245  * Returns true if @a == @b, false otherwise.
1246  */
1247 static inline bool tomoyo_same_number_union
1248 (const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
1249 {
1250         return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
1251                 a->group == b->group && a->value_type[0] == b->value_type[0] &&
1252                 a->value_type[1] == b->value_type[1];
1253 }
1254 
1255 /**
1256  * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
1257  *
1258  * @a: Pointer to "struct tomoyo_ipaddr_union".
1259  * @b: Pointer to "struct tomoyo_ipaddr_union".
1260  *
1261  * Returns true if @a == @b, false otherwise.
1262  */
1263 static inline bool tomoyo_same_ipaddr_union
1264 (const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
1265 {
1266         return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
1267                 a->is_ipv6 == b->is_ipv6;
1268 }
1269 
1270 /**
1271  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
1272  *
1273  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
1274  */
1275 static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
1276 {
1277         return tomoyo_domain()->ns;
1278 }
1279 
1280 #if defined(CONFIG_SLOB)
1281 
1282 /**
1283  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1284  *
1285  * @size: Size to be rounded up.
1286  *
1287  * Returns @size.
1288  *
1289  * Since SLOB does not round up, this function simply returns @size.
1290  */
1291 static inline int tomoyo_round2(size_t size)
1292 {
1293         return size;
1294 }
1295 
1296 #else
1297 
1298 /**
1299  * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
1300  *
1301  * @size: Size to be rounded up.
1302  *
1303  * Returns rounded size.
1304  *
1305  * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
1306  * (e.g.) 128 bytes.
1307  */
1308 static inline int tomoyo_round2(size_t size)
1309 {
1310 #if PAGE_SIZE == 4096
1311         size_t bsize = 32;
1312 #else
1313         size_t bsize = 64;
1314 #endif
1315         if (!size)
1316                 return 0;
1317         while (size > bsize)
1318                 bsize <<= 1;
1319         return bsize;
1320 }
1321 
1322 #endif
1323 
1324 /**
1325  * list_for_each_cookie - iterate over a list with cookie.
1326  * @pos:        the &struct list_head to use as a loop cursor.
1327  * @head:       the head for your list.
1328  */
1329 #define list_for_each_cookie(pos, head)                                 \
1330         if (!pos)                                                       \
1331                 pos =  srcu_dereference((head)->next, &tomoyo_ss);      \
1332         for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
1333 
1334 #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
1335 

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