2 * security/tomoyo/common.c
4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
7 #include <linux/uaccess.h>
8 #include <linux/slab.h>
9 #include <linux/security.h>
12 /* String table for operation mode. */
13 const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
14 [TOMOYO_CONFIG_DISABLED] = "disabled",
15 [TOMOYO_CONFIG_LEARNING] = "learning",
16 [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
17 [TOMOYO_CONFIG_ENFORCING] = "enforcing"
20 /* String table for /sys/kernel/security/tomoyo/profile */
21 const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
22 + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
23 /* CONFIG::file group */
24 [TOMOYO_MAC_FILE_EXECUTE] = "execute",
25 [TOMOYO_MAC_FILE_OPEN] = "open",
26 [TOMOYO_MAC_FILE_CREATE] = "create",
27 [TOMOYO_MAC_FILE_UNLINK] = "unlink",
28 [TOMOYO_MAC_FILE_GETATTR] = "getattr",
29 [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
30 [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
31 [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
32 [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
33 [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
34 [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
35 [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
36 [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
37 [TOMOYO_MAC_FILE_LINK] = "link",
38 [TOMOYO_MAC_FILE_RENAME] = "rename",
39 [TOMOYO_MAC_FILE_CHMOD] = "chmod",
40 [TOMOYO_MAC_FILE_CHOWN] = "chown",
41 [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
42 [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
43 [TOMOYO_MAC_FILE_CHROOT] = "chroot",
44 [TOMOYO_MAC_FILE_MOUNT] = "mount",
45 [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
46 [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
47 /* CONFIG::network group */
48 [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
49 [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
50 [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
51 [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
52 [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
53 [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
54 [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
55 [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
56 [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
57 [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
58 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
59 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
60 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
61 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
62 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
63 /* CONFIG::misc group */
64 [TOMOYO_MAC_ENVIRON] = "env",
66 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
67 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
68 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
71 /* String table for conditions. */
72 const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
73 [TOMOYO_TASK_UID] = "task.uid",
74 [TOMOYO_TASK_EUID] = "task.euid",
75 [TOMOYO_TASK_SUID] = "task.suid",
76 [TOMOYO_TASK_FSUID] = "task.fsuid",
77 [TOMOYO_TASK_GID] = "task.gid",
78 [TOMOYO_TASK_EGID] = "task.egid",
79 [TOMOYO_TASK_SGID] = "task.sgid",
80 [TOMOYO_TASK_FSGID] = "task.fsgid",
81 [TOMOYO_TASK_PID] = "task.pid",
82 [TOMOYO_TASK_PPID] = "task.ppid",
83 [TOMOYO_EXEC_ARGC] = "exec.argc",
84 [TOMOYO_EXEC_ENVC] = "exec.envc",
85 [TOMOYO_TYPE_IS_SOCKET] = "socket",
86 [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
87 [TOMOYO_TYPE_IS_FILE] = "file",
88 [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
89 [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
90 [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
91 [TOMOYO_TYPE_IS_FIFO] = "fifo",
92 [TOMOYO_MODE_SETUID] = "setuid",
93 [TOMOYO_MODE_SETGID] = "setgid",
94 [TOMOYO_MODE_STICKY] = "sticky",
95 [TOMOYO_MODE_OWNER_READ] = "owner_read",
96 [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
97 [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
98 [TOMOYO_MODE_GROUP_READ] = "group_read",
99 [TOMOYO_MODE_GROUP_WRITE] = "group_write",
100 [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
101 [TOMOYO_MODE_OTHERS_READ] = "others_read",
102 [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
103 [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
104 [TOMOYO_EXEC_REALPATH] = "exec.realpath",
105 [TOMOYO_SYMLINK_TARGET] = "symlink.target",
106 [TOMOYO_PATH1_UID] = "path1.uid",
107 [TOMOYO_PATH1_GID] = "path1.gid",
108 [TOMOYO_PATH1_INO] = "path1.ino",
109 [TOMOYO_PATH1_MAJOR] = "path1.major",
110 [TOMOYO_PATH1_MINOR] = "path1.minor",
111 [TOMOYO_PATH1_PERM] = "path1.perm",
112 [TOMOYO_PATH1_TYPE] = "path1.type",
113 [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
114 [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
115 [TOMOYO_PATH2_UID] = "path2.uid",
116 [TOMOYO_PATH2_GID] = "path2.gid",
117 [TOMOYO_PATH2_INO] = "path2.ino",
118 [TOMOYO_PATH2_MAJOR] = "path2.major",
119 [TOMOYO_PATH2_MINOR] = "path2.minor",
120 [TOMOYO_PATH2_PERM] = "path2.perm",
121 [TOMOYO_PATH2_TYPE] = "path2.type",
122 [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
123 [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
124 [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
125 [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
126 [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
127 [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
128 [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
129 [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
130 [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
131 [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
134 /* String table for PREFERENCE keyword. */
135 static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
136 [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
137 [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
140 /* String table for path operation. */
141 const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
142 [TOMOYO_TYPE_EXECUTE] = "execute",
143 [TOMOYO_TYPE_READ] = "read",
144 [TOMOYO_TYPE_WRITE] = "write",
145 [TOMOYO_TYPE_APPEND] = "append",
146 [TOMOYO_TYPE_UNLINK] = "unlink",
147 [TOMOYO_TYPE_GETATTR] = "getattr",
148 [TOMOYO_TYPE_RMDIR] = "rmdir",
149 [TOMOYO_TYPE_TRUNCATE] = "truncate",
150 [TOMOYO_TYPE_SYMLINK] = "symlink",
151 [TOMOYO_TYPE_CHROOT] = "chroot",
152 [TOMOYO_TYPE_UMOUNT] = "unmount",
155 /* String table for socket's operation. */
156 const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
157 [TOMOYO_NETWORK_BIND] = "bind",
158 [TOMOYO_NETWORK_LISTEN] = "listen",
159 [TOMOYO_NETWORK_CONNECT] = "connect",
160 [TOMOYO_NETWORK_SEND] = "send",
163 /* String table for categories. */
164 static const char * const tomoyo_category_keywords
165 [TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
166 [TOMOYO_MAC_CATEGORY_FILE] = "file",
167 [TOMOYO_MAC_CATEGORY_NETWORK] = "network",
168 [TOMOYO_MAC_CATEGORY_MISC] = "misc",
171 /* Permit policy management by non-root user? */
172 static bool tomoyo_manage_by_non_root;
174 /* Utility functions. */
177 * tomoyo_yesno - Return "yes" or "no".
179 * @value: Bool value.
181 const char *tomoyo_yesno(const unsigned int value)
183 return value ? "yes" : "no";
187 * tomoyo_addprintf - strncat()-like-snprintf().
189 * @buffer: Buffer to write to. Must be '\0'-terminated.
190 * @len: Size of @buffer.
191 * @fmt: The printf()'s format string, followed by parameters.
195 static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
198 const int pos = strlen(buffer);
200 vsnprintf(buffer + pos, len - pos - 1, fmt, args);
205 * tomoyo_flush - Flush queued string to userspace's buffer.
207 * @head: Pointer to "struct tomoyo_io_buffer".
209 * Returns true if all data was flushed, false otherwise.
211 static bool tomoyo_flush(struct tomoyo_io_buffer *head)
213 while (head->r.w_pos) {
214 const char *w = head->r.w[0];
215 size_t len = strlen(w);
217 if (len > head->read_user_buf_avail)
218 len = head->read_user_buf_avail;
221 if (copy_to_user(head->read_user_buf, w, len))
223 head->read_user_buf_avail -= len;
224 head->read_user_buf += len;
230 /* Add '\0' for audit logs and query. */
232 if (!head->read_user_buf_avail ||
233 copy_to_user(head->read_user_buf, "", 1))
235 head->read_user_buf_avail--;
236 head->read_user_buf++;
239 for (len = 0; len < head->r.w_pos; len++)
240 head->r.w[len] = head->r.w[len + 1];
247 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
249 * @head: Pointer to "struct tomoyo_io_buffer".
250 * @string: String to print.
252 * Note that @string has to be kept valid until @head is kfree()d.
253 * This means that char[] allocated on stack memory cannot be passed to
254 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
256 static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
258 if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
259 head->r.w[head->r.w_pos++] = string;
266 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
268 * @head: Pointer to "struct tomoyo_io_buffer".
269 * @fmt: The printf()'s format string, followed by parameters.
271 void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
275 size_t pos = head->r.avail;
276 int size = head->readbuf_size - pos;
280 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
282 if (pos + len >= head->readbuf_size) {
286 head->r.avail += len;
287 tomoyo_set_string(head, head->read_buf + pos);
291 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
293 * @head: Pointer to "struct tomoyo_io_buffer".
297 static void tomoyo_set_space(struct tomoyo_io_buffer *head)
299 tomoyo_set_string(head, " ");
303 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
305 * @head: Pointer to "struct tomoyo_io_buffer".
309 static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
311 tomoyo_set_string(head, "\n");
312 return !head->r.w_pos;
316 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
318 * @head: Pointer to "struct tomoyo_io_buffer".
322 static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
324 tomoyo_set_string(head, "/");
327 /* List of namespaces. */
328 LIST_HEAD(tomoyo_namespace_list);
329 /* True if namespace other than tomoyo_kernel_namespace is defined. */
330 static bool tomoyo_namespace_enabled;
333 * tomoyo_init_policy_namespace - Initialize namespace.
335 * @ns: Pointer to "struct tomoyo_policy_namespace".
339 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
342 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
343 INIT_LIST_HEAD(&ns->acl_group[idx]);
344 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
345 INIT_LIST_HEAD(&ns->group_list[idx]);
346 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
347 INIT_LIST_HEAD(&ns->policy_list[idx]);
348 ns->profile_version = 20100903;
349 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
350 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
354 * tomoyo_print_namespace - Print namespace header.
356 * @head: Pointer to "struct tomoyo_io_buffer".
360 static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
362 if (!tomoyo_namespace_enabled)
364 tomoyo_set_string(head,
365 container_of(head->r.ns,
366 struct tomoyo_policy_namespace,
367 namespace_list)->name);
368 tomoyo_set_space(head);
372 * tomoyo_print_name_union - Print a tomoyo_name_union.
374 * @head: Pointer to "struct tomoyo_io_buffer".
375 * @ptr: Pointer to "struct tomoyo_name_union".
377 static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
378 const struct tomoyo_name_union *ptr)
380 tomoyo_set_space(head);
382 tomoyo_set_string(head, "@");
383 tomoyo_set_string(head, ptr->group->group_name->name);
385 tomoyo_set_string(head, ptr->filename->name);
390 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
392 * @head: Pointer to "struct tomoyo_io_buffer".
393 * @ptr: Pointer to "struct tomoyo_name_union".
397 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
398 const struct tomoyo_name_union *ptr)
401 tomoyo_set_string(head, "@");
402 tomoyo_set_string(head, ptr->group->group_name->name);
404 tomoyo_set_string(head, "\"");
405 tomoyo_set_string(head, ptr->filename->name);
406 tomoyo_set_string(head, "\"");
411 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
413 * @head: Pointer to "struct tomoyo_io_buffer".
414 * @ptr: Pointer to "struct tomoyo_number_union".
418 static void tomoyo_print_number_union_nospace
419 (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
422 tomoyo_set_string(head, "@");
423 tomoyo_set_string(head, ptr->group->group_name->name);
426 unsigned long min = ptr->values[0];
427 const unsigned long max = ptr->values[1];
428 u8 min_type = ptr->value_type[0];
429 const u8 max_type = ptr->value_type[1];
432 for (i = 0; i < 2; i++) {
434 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
435 tomoyo_addprintf(buffer, sizeof(buffer),
438 case TOMOYO_VALUE_TYPE_OCTAL:
439 tomoyo_addprintf(buffer, sizeof(buffer),
443 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
447 if (min == max && min_type == max_type)
449 tomoyo_addprintf(buffer, sizeof(buffer), "-");
453 tomoyo_io_printf(head, "%s", buffer);
458 * tomoyo_print_number_union - Print a tomoyo_number_union.
460 * @head: Pointer to "struct tomoyo_io_buffer".
461 * @ptr: Pointer to "struct tomoyo_number_union".
465 static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
466 const struct tomoyo_number_union *ptr)
468 tomoyo_set_space(head);
469 tomoyo_print_number_union_nospace(head, ptr);
473 * tomoyo_assign_profile - Create a new profile.
475 * @ns: Pointer to "struct tomoyo_policy_namespace".
476 * @profile: Profile number to create.
478 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
480 static struct tomoyo_profile *tomoyo_assign_profile
481 (struct tomoyo_policy_namespace *ns, const unsigned int profile)
483 struct tomoyo_profile *ptr;
484 struct tomoyo_profile *entry;
485 if (profile >= TOMOYO_MAX_PROFILES)
487 ptr = ns->profile_ptr[profile];
490 entry = kzalloc(sizeof(*entry), GFP_NOFS);
491 if (mutex_lock_interruptible(&tomoyo_policy_lock))
493 ptr = ns->profile_ptr[profile];
494 if (!ptr && tomoyo_memory_ok(entry)) {
496 ptr->default_config = TOMOYO_CONFIG_DISABLED |
497 TOMOYO_CONFIG_WANT_GRANT_LOG |
498 TOMOYO_CONFIG_WANT_REJECT_LOG;
499 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
500 sizeof(ptr->config));
501 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024;
502 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048;
503 mb(); /* Avoid out-of-order execution. */
504 ns->profile_ptr[profile] = ptr;
507 mutex_unlock(&tomoyo_policy_lock);
514 * tomoyo_profile - Find a profile.
516 * @ns: Pointer to "struct tomoyo_policy_namespace".
517 * @profile: Profile number to find.
519 * Returns pointer to "struct tomoyo_profile".
521 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
524 static struct tomoyo_profile tomoyo_null_profile;
525 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
527 ptr = &tomoyo_null_profile;
532 * tomoyo_find_yesno - Find values for specified keyword.
534 * @string: String to check.
535 * @find: Name of keyword.
537 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
539 static s8 tomoyo_find_yesno(const char *string, const char *find)
541 const char *cp = strstr(string, find);
544 if (!strncmp(cp, "=yes", 4))
546 else if (!strncmp(cp, "=no", 3))
553 * tomoyo_set_uint - Set value for specified preference.
555 * @i: Pointer to "unsigned int".
556 * @string: String to check.
557 * @find: Name of keyword.
561 static void tomoyo_set_uint(unsigned int *i, const char *string,
564 const char *cp = strstr(string, find);
566 sscanf(cp + strlen(find), "=%u", i);
570 * tomoyo_set_mode - Set mode for specified profile.
572 * @name: Name of functionality.
573 * @value: Mode for @name.
574 * @profile: Pointer to "struct tomoyo_profile".
576 * Returns 0 on success, negative value otherwise.
578 static int tomoyo_set_mode(char *name, const char *value,
579 struct tomoyo_profile *profile)
583 if (!strcmp(name, "CONFIG")) {
584 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
585 config = profile->default_config;
586 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
588 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
589 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
591 if (i < TOMOYO_MAX_MAC_INDEX) {
592 const u8 c = tomoyo_index2category[i];
593 const char *category =
594 tomoyo_category_keywords[c];
595 len = strlen(category);
596 if (strncmp(name, category, len) ||
597 name[len++] != ':' || name[len++] != ':')
600 if (strcmp(name + len, tomoyo_mac_keywords[i]))
602 config = profile->config[i];
605 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
610 if (strstr(value, "use_default")) {
611 config = TOMOYO_CONFIG_USE_DEFAULT;
614 for (mode = 0; mode < 4; mode++)
615 if (strstr(value, tomoyo_mode[mode]))
617 * Update lower 3 bits in order to distinguish
618 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
620 config = (config & ~7) | mode;
621 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
622 switch (tomoyo_find_yesno(value, "grant_log")) {
624 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
627 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
630 switch (tomoyo_find_yesno(value, "reject_log")) {
632 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
635 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
640 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
641 profile->config[i] = config;
642 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
643 profile->default_config = config;
648 * tomoyo_write_profile - Write profile table.
650 * @head: Pointer to "struct tomoyo_io_buffer".
652 * Returns 0 on success, negative value otherwise.
654 static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
656 char *data = head->write_buf;
659 struct tomoyo_profile *profile;
660 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
663 i = simple_strtoul(data, &cp, 10);
667 profile = tomoyo_assign_profile(head->w.ns, i);
670 cp = strchr(data, '=');
674 if (!strcmp(data, "COMMENT")) {
675 static DEFINE_SPINLOCK(lock);
676 const struct tomoyo_path_info *new_comment
677 = tomoyo_get_name(cp);
678 const struct tomoyo_path_info *old_comment;
682 old_comment = profile->comment;
683 profile->comment = new_comment;
685 tomoyo_put_name(old_comment);
688 if (!strcmp(data, "PREFERENCE")) {
689 for (i = 0; i < TOMOYO_MAX_PREF; i++)
690 tomoyo_set_uint(&profile->pref[i], cp,
691 tomoyo_pref_keywords[i]);
694 return tomoyo_set_mode(data, cp, profile);
698 * tomoyo_print_config - Print mode for specified functionality.
700 * @head: Pointer to "struct tomoyo_io_buffer".
701 * @config: Mode for that functionality.
705 * Caller prints functionality's name.
707 static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
709 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
710 tomoyo_mode[config & 3],
711 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
712 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
716 * tomoyo_read_profile - Read profile table.
718 * @head: Pointer to "struct tomoyo_io_buffer".
722 static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
725 struct tomoyo_policy_namespace *ns =
726 container_of(head->r.ns, typeof(*ns), namespace_list);
727 const struct tomoyo_profile *profile;
731 index = head->r.index;
732 profile = ns->profile_ptr[index];
733 switch (head->r.step) {
735 tomoyo_print_namespace(head);
736 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
737 ns->profile_version);
741 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
743 if (ns->profile_ptr[head->r.index])
745 if (head->r.index == TOMOYO_MAX_PROFILES)
752 const struct tomoyo_path_info *comment =
754 tomoyo_print_namespace(head);
755 tomoyo_io_printf(head, "%u-COMMENT=", index);
756 tomoyo_set_string(head, comment ? comment->name : "");
758 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
759 for (i = 0; i < TOMOYO_MAX_PREF; i++)
760 tomoyo_io_printf(head, "%s=%u ",
761 tomoyo_pref_keywords[i],
763 tomoyo_set_string(head, "}\n");
769 tomoyo_print_namespace(head);
770 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
771 tomoyo_print_config(head, profile->default_config);
777 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
778 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
779 const u8 i = head->r.bit;
780 const u8 config = profile->config[i];
781 if (config == TOMOYO_CONFIG_USE_DEFAULT)
783 tomoyo_print_namespace(head);
784 if (i < TOMOYO_MAX_MAC_INDEX)
785 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
787 tomoyo_category_keywords
788 [tomoyo_index2category[i]],
789 tomoyo_mac_keywords[i]);
791 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
792 tomoyo_mac_keywords[i]);
793 tomoyo_print_config(head, config);
797 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
798 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
804 if (tomoyo_flush(head))
809 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
811 * @a: Pointer to "struct tomoyo_acl_head".
812 * @b: Pointer to "struct tomoyo_acl_head".
814 * Returns true if @a == @b, false otherwise.
816 static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
817 const struct tomoyo_acl_head *b)
819 return container_of(a, struct tomoyo_manager, head)->manager ==
820 container_of(b, struct tomoyo_manager, head)->manager;
824 * tomoyo_update_manager_entry - Add a manager entry.
826 * @manager: The path to manager or the domainnamme.
827 * @is_delete: True if it is a delete request.
829 * Returns 0 on success, negative value otherwise.
831 * Caller holds tomoyo_read_lock().
833 static int tomoyo_update_manager_entry(const char *manager,
834 const bool is_delete)
836 struct tomoyo_manager e = { };
837 struct tomoyo_acl_param param = {
838 /* .ns = &tomoyo_kernel_namespace, */
839 .is_delete = is_delete,
840 .list = &tomoyo_kernel_namespace.
841 policy_list[TOMOYO_ID_MANAGER],
843 int error = is_delete ? -ENOENT : -ENOMEM;
844 if (tomoyo_domain_def(manager)) {
845 if (!tomoyo_correct_domain(manager))
849 if (!tomoyo_correct_path(manager))
852 e.manager = tomoyo_get_name(manager);
854 error = tomoyo_update_policy(&e.head, sizeof(e), ¶m,
855 tomoyo_same_manager);
856 tomoyo_put_name(e.manager);
862 * tomoyo_write_manager - Write manager policy.
864 * @head: Pointer to "struct tomoyo_io_buffer".
866 * Returns 0 on success, negative value otherwise.
868 * Caller holds tomoyo_read_lock().
870 static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
872 char *data = head->write_buf;
874 if (!strcmp(data, "manage_by_non_root")) {
875 tomoyo_manage_by_non_root = !head->w.is_delete;
878 return tomoyo_update_manager_entry(data, head->w.is_delete);
882 * tomoyo_read_manager - Read manager policy.
884 * @head: Pointer to "struct tomoyo_io_buffer".
886 * Caller holds tomoyo_read_lock().
888 static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
892 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.
893 policy_list[TOMOYO_ID_MANAGER]) {
894 struct tomoyo_manager *ptr =
895 list_entry(head->r.acl, typeof(*ptr), head.list);
896 if (ptr->head.is_deleted)
898 if (!tomoyo_flush(head))
900 tomoyo_set_string(head, ptr->manager->name);
907 * tomoyo_manager - Check whether the current process is a policy manager.
909 * Returns true if the current process is permitted to modify policy
910 * via /sys/kernel/security/tomoyo/ interface.
912 * Caller holds tomoyo_read_lock().
914 static bool tomoyo_manager(void)
916 struct tomoyo_manager *ptr;
918 const struct task_struct *task = current;
919 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
922 if (!tomoyo_policy_loaded)
924 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
926 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
927 policy_list[TOMOYO_ID_MANAGER], head.list) {
928 if (!ptr->head.is_deleted && ptr->is_domain
929 && !tomoyo_pathcmp(domainname, ptr->manager)) {
936 exe = tomoyo_get_exe();
939 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
940 policy_list[TOMOYO_ID_MANAGER], head.list) {
941 if (!ptr->head.is_deleted && !ptr->is_domain
942 && !strcmp(exe, ptr->manager->name)) {
947 if (!found) { /* Reduce error messages. */
948 static pid_t last_pid;
949 const pid_t pid = current->pid;
950 if (last_pid != pid) {
951 printk(KERN_WARNING "%s ( %s ) is not permitted to "
952 "update policies.\n", domainname->name, exe);
961 * tomoyo_select_domain - Parse select command.
963 * @head: Pointer to "struct tomoyo_io_buffer".
964 * @data: String to parse.
966 * Returns true on success, false otherwise.
968 * Caller holds tomoyo_read_lock().
970 static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
974 struct tomoyo_domain_info *domain = NULL;
975 bool global_pid = false;
976 if (strncmp(data, "select ", 7))
979 if (sscanf(data, "pid=%u", &pid) == 1 ||
980 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
981 struct task_struct *p;
983 read_lock(&tasklist_lock);
985 p = find_task_by_pid_ns(pid, &init_pid_ns);
987 p = find_task_by_vpid(pid);
989 domain = tomoyo_real_domain(p);
990 read_unlock(&tasklist_lock);
992 } else if (!strncmp(data, "domain=", 7)) {
993 if (tomoyo_domain_def(data + 7))
994 domain = tomoyo_find_domain(data + 7);
997 head->w.domain = domain;
998 /* Accessing read_buf is safe because head->io_sem is held. */
1000 return true; /* Do nothing if open(O_WRONLY). */
1001 memset(&head->r, 0, sizeof(head->r));
1002 head->r.print_this_domain_only = true;
1004 head->r.domain = &domain->list;
1007 tomoyo_io_printf(head, "# select %s\n", data);
1008 if (domain && domain->is_deleted)
1009 tomoyo_io_printf(head, "# This is a deleted domain.\n");
1014 * tomoyo_delete_domain - Delete a domain.
1016 * @domainname: The name of domain.
1020 * Caller holds tomoyo_read_lock().
1022 static int tomoyo_delete_domain(char *domainname)
1024 struct tomoyo_domain_info *domain;
1025 struct tomoyo_path_info name;
1027 name.name = domainname;
1028 tomoyo_fill_path_info(&name);
1029 if (mutex_lock_interruptible(&tomoyo_policy_lock))
1031 /* Is there an active domain? */
1032 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
1033 /* Never delete tomoyo_kernel_domain */
1034 if (domain == &tomoyo_kernel_domain)
1036 if (domain->is_deleted ||
1037 tomoyo_pathcmp(domain->domainname, &name))
1039 domain->is_deleted = true;
1042 mutex_unlock(&tomoyo_policy_lock);
1047 * tomoyo_write_domain2 - Write domain policy.
1049 * @ns: Pointer to "struct tomoyo_policy_namespace".
1050 * @list: Pointer to "struct list_head".
1051 * @data: Policy to be interpreted.
1052 * @is_delete: True if it is a delete request.
1054 * Returns 0 on success, negative value otherwise.
1056 * Caller holds tomoyo_read_lock().
1058 static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1059 struct list_head *list, char *data,
1060 const bool is_delete)
1062 struct tomoyo_acl_param param = {
1066 .is_delete = is_delete,
1068 static const struct {
1069 const char *keyword;
1070 int (*write) (struct tomoyo_acl_param *);
1071 } tomoyo_callback[4] = {
1072 { "file ", tomoyo_write_file },
1073 { "network inet ", tomoyo_write_inet_network },
1074 { "network unix ", tomoyo_write_unix_network },
1075 { "misc ", tomoyo_write_misc },
1079 for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
1080 if (!tomoyo_str_starts(¶m.data,
1081 tomoyo_callback[i].keyword))
1083 return tomoyo_callback[i].write(¶m);
1088 /* String table for domain flags. */
1089 const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1090 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1091 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1095 * tomoyo_write_domain - Write domain policy.
1097 * @head: Pointer to "struct tomoyo_io_buffer".
1099 * Returns 0 on success, negative value otherwise.
1101 * Caller holds tomoyo_read_lock().
1103 static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
1105 char *data = head->write_buf;
1106 struct tomoyo_policy_namespace *ns;
1107 struct tomoyo_domain_info *domain = head->w.domain;
1108 const bool is_delete = head->w.is_delete;
1109 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
1110 unsigned int profile;
1114 tomoyo_delete_domain(data);
1116 domain = tomoyo_find_domain(data);
1118 domain = tomoyo_assign_domain(data, false);
1119 head->w.domain = domain;
1125 if (sscanf(data, "use_profile %u", &profile) == 1
1126 && profile < TOMOYO_MAX_PROFILES) {
1127 if (!tomoyo_policy_loaded || ns->profile_ptr[profile])
1128 domain->profile = (u8) profile;
1131 if (sscanf(data, "use_group %u\n", &profile) == 1
1132 && profile < TOMOYO_MAX_ACL_GROUPS) {
1134 domain->group = (u8) profile;
1137 for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) {
1138 const char *cp = tomoyo_dif[profile];
1139 if (strncmp(data, cp, strlen(cp) - 1))
1141 domain->flags[profile] = !is_delete;
1144 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1149 * tomoyo_print_condition - Print condition part.
1151 * @head: Pointer to "struct tomoyo_io_buffer".
1152 * @cond: Pointer to "struct tomoyo_condition".
1154 * Returns true on success, false otherwise.
1156 static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1157 const struct tomoyo_condition *cond)
1159 switch (head->r.cond_step) {
1161 head->r.cond_index = 0;
1162 head->r.cond_step++;
1166 const u16 condc = cond->condc;
1167 const struct tomoyo_condition_element *condp =
1168 (typeof(condp)) (cond + 1);
1169 const struct tomoyo_number_union *numbers_p =
1170 (typeof(numbers_p)) (condp + condc);
1171 const struct tomoyo_name_union *names_p =
1173 (numbers_p + cond->numbers_count);
1174 const struct tomoyo_argv *argv =
1175 (typeof(argv)) (names_p + cond->names_count);
1176 const struct tomoyo_envp *envp =
1177 (typeof(envp)) (argv + cond->argc);
1179 for (skip = 0; skip < head->r.cond_index; skip++) {
1180 const u8 left = condp->left;
1181 const u8 right = condp->right;
1184 case TOMOYO_ARGV_ENTRY:
1187 case TOMOYO_ENVP_ENTRY:
1190 case TOMOYO_NUMBER_UNION:
1195 case TOMOYO_NAME_UNION:
1198 case TOMOYO_NUMBER_UNION:
1203 while (head->r.cond_index < condc) {
1204 const u8 match = condp->equals;
1205 const u8 left = condp->left;
1206 const u8 right = condp->right;
1207 if (!tomoyo_flush(head))
1210 head->r.cond_index++;
1211 tomoyo_set_space(head);
1213 case TOMOYO_ARGV_ENTRY:
1214 tomoyo_io_printf(head,
1215 "exec.argv[%lu]%s=\"",
1218 tomoyo_set_string(head,
1220 tomoyo_set_string(head, "\"");
1223 case TOMOYO_ENVP_ENTRY:
1224 tomoyo_set_string(head,
1226 tomoyo_set_string(head,
1228 tomoyo_io_printf(head, "\"]%s=", envp->
1231 tomoyo_set_string(head, "\"");
1232 tomoyo_set_string(head, envp->
1234 tomoyo_set_string(head, "\"");
1236 tomoyo_set_string(head,
1241 case TOMOYO_NUMBER_UNION:
1242 tomoyo_print_number_union_nospace
1243 (head, numbers_p++);
1246 tomoyo_set_string(head,
1247 tomoyo_condition_keyword[left]);
1250 tomoyo_set_string(head, match ? "=" : "!=");
1252 case TOMOYO_NAME_UNION:
1253 tomoyo_print_name_union_quoted
1256 case TOMOYO_NUMBER_UNION:
1257 tomoyo_print_number_union_nospace
1258 (head, numbers_p++);
1261 tomoyo_set_string(head,
1262 tomoyo_condition_keyword[right]);
1267 head->r.cond_step++;
1270 if (!tomoyo_flush(head))
1272 head->r.cond_step++;
1275 if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
1276 tomoyo_io_printf(head, " grant_log=%s",
1277 tomoyo_yesno(cond->grant_log ==
1278 TOMOYO_GRANTLOG_YES));
1279 tomoyo_set_lf(head);
1286 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1288 * @head: Pointer to "struct tomoyo_io_buffer".
1289 * @category: Category name.
1293 static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1294 const char *category)
1296 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1297 tomoyo_print_namespace(head);
1298 tomoyo_io_printf(head, "acl_group %u ",
1299 head->r.acl_group_index);
1301 tomoyo_set_string(head, category);
1305 * tomoyo_print_entry - Print an ACL entry.
1307 * @head: Pointer to "struct tomoyo_io_buffer".
1308 * @acl: Pointer to an ACL entry.
1310 * Returns true on success, false otherwise.
1312 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
1313 struct tomoyo_acl_info *acl)
1315 const u8 acl_type = acl->type;
1319 if (head->r.print_cond_part)
1320 goto print_cond_part;
1321 if (acl->is_deleted)
1323 if (!tomoyo_flush(head))
1325 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
1326 struct tomoyo_path_acl *ptr =
1327 container_of(acl, typeof(*ptr), head);
1328 const u16 perm = ptr->perm;
1329 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
1330 if (!(perm & (1 << bit)))
1332 if (head->r.print_transition_related_only &&
1333 bit != TOMOYO_TYPE_EXECUTE)
1336 tomoyo_set_group(head, "file ");
1339 tomoyo_set_slash(head);
1341 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
1345 tomoyo_print_name_union(head, &ptr->name);
1346 } else if (head->r.print_transition_related_only) {
1348 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1349 struct tomoyo_path2_acl *ptr =
1350 container_of(acl, typeof(*ptr), head);
1351 const u8 perm = ptr->perm;
1352 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1353 if (!(perm & (1 << bit)))
1356 tomoyo_set_group(head, "file ");
1359 tomoyo_set_slash(head);
1361 tomoyo_set_string(head, tomoyo_mac_keywords
1362 [tomoyo_pp2mac[bit]]);
1366 tomoyo_print_name_union(head, &ptr->name1);
1367 tomoyo_print_name_union(head, &ptr->name2);
1368 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1369 struct tomoyo_path_number_acl *ptr =
1370 container_of(acl, typeof(*ptr), head);
1371 const u8 perm = ptr->perm;
1372 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1373 if (!(perm & (1 << bit)))
1376 tomoyo_set_group(head, "file ");
1379 tomoyo_set_slash(head);
1381 tomoyo_set_string(head, tomoyo_mac_keywords
1382 [tomoyo_pn2mac[bit]]);
1386 tomoyo_print_name_union(head, &ptr->name);
1387 tomoyo_print_number_union(head, &ptr->number);
1388 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1389 struct tomoyo_mkdev_acl *ptr =
1390 container_of(acl, typeof(*ptr), head);
1391 const u8 perm = ptr->perm;
1392 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1393 if (!(perm & (1 << bit)))
1396 tomoyo_set_group(head, "file ");
1399 tomoyo_set_slash(head);
1401 tomoyo_set_string(head, tomoyo_mac_keywords
1402 [tomoyo_pnnn2mac[bit]]);
1406 tomoyo_print_name_union(head, &ptr->name);
1407 tomoyo_print_number_union(head, &ptr->mode);
1408 tomoyo_print_number_union(head, &ptr->major);
1409 tomoyo_print_number_union(head, &ptr->minor);
1410 } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
1411 struct tomoyo_inet_acl *ptr =
1412 container_of(acl, typeof(*ptr), head);
1413 const u8 perm = ptr->perm;
1415 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1416 if (!(perm & (1 << bit)))
1419 tomoyo_set_group(head, "network inet ");
1420 tomoyo_set_string(head, tomoyo_proto_keyword
1422 tomoyo_set_space(head);
1425 tomoyo_set_slash(head);
1427 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1431 tomoyo_set_space(head);
1432 if (ptr->address.group) {
1433 tomoyo_set_string(head, "@");
1434 tomoyo_set_string(head, ptr->address.group->group_name
1438 tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
1439 tomoyo_io_printf(head, "%s", buf);
1441 tomoyo_print_number_union(head, &ptr->port);
1442 } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
1443 struct tomoyo_unix_acl *ptr =
1444 container_of(acl, typeof(*ptr), head);
1445 const u8 perm = ptr->perm;
1447 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1448 if (!(perm & (1 << bit)))
1451 tomoyo_set_group(head, "network unix ");
1452 tomoyo_set_string(head, tomoyo_proto_keyword
1454 tomoyo_set_space(head);
1457 tomoyo_set_slash(head);
1459 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1463 tomoyo_print_name_union(head, &ptr->name);
1464 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1465 struct tomoyo_mount_acl *ptr =
1466 container_of(acl, typeof(*ptr), head);
1467 tomoyo_set_group(head, "file mount");
1468 tomoyo_print_name_union(head, &ptr->dev_name);
1469 tomoyo_print_name_union(head, &ptr->dir_name);
1470 tomoyo_print_name_union(head, &ptr->fs_type);
1471 tomoyo_print_number_union(head, &ptr->flags);
1472 } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
1473 struct tomoyo_env_acl *ptr =
1474 container_of(acl, typeof(*ptr), head);
1476 tomoyo_set_group(head, "misc env ");
1477 tomoyo_set_string(head, ptr->env->name);
1480 head->r.print_cond_part = true;
1481 head->r.cond_step = 0;
1482 if (!tomoyo_flush(head))
1485 if (!tomoyo_print_condition(head, acl->cond))
1487 head->r.print_cond_part = false;
1489 tomoyo_set_lf(head);
1495 * tomoyo_read_domain2 - Read domain policy.
1497 * @head: Pointer to "struct tomoyo_io_buffer".
1498 * @list: Pointer to "struct list_head".
1500 * Caller holds tomoyo_read_lock().
1502 * Returns true on success, false otherwise.
1504 static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
1505 struct list_head *list)
1507 list_for_each_cookie(head->r.acl, list) {
1508 struct tomoyo_acl_info *ptr =
1509 list_entry(head->r.acl, typeof(*ptr), list);
1510 if (!tomoyo_print_entry(head, ptr))
1518 * tomoyo_read_domain - Read domain policy.
1520 * @head: Pointer to "struct tomoyo_io_buffer".
1522 * Caller holds tomoyo_read_lock().
1524 static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
1528 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
1529 struct tomoyo_domain_info *domain =
1530 list_entry(head->r.domain, typeof(*domain), list);
1531 switch (head->r.step) {
1534 if (domain->is_deleted &&
1535 !head->r.print_this_domain_only)
1537 /* Print domainname and flags. */
1538 tomoyo_set_string(head, domain->domainname->name);
1539 tomoyo_set_lf(head);
1540 tomoyo_io_printf(head, "use_profile %u\n",
1542 tomoyo_io_printf(head, "use_group %u\n",
1544 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1545 if (domain->flags[i])
1546 tomoyo_set_string(head, tomoyo_dif[i]);
1548 tomoyo_set_lf(head);
1551 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
1554 if (!tomoyo_set_lf(head))
1559 if (head->r.print_this_domain_only)
1568 * tomoyo_write_pid: Specify PID to obtain domainname.
1570 * @head: Pointer to "struct tomoyo_io_buffer".
1574 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1576 head->r.eof = false;
1581 * tomoyo_read_pid - Get domainname of the specified PID.
1583 * @head: Pointer to "struct tomoyo_io_buffer".
1585 * Returns the domainname which the specified PID is in on success,
1586 * empty string otherwise.
1587 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1588 * using read()/write() interface rather than sysctl() interface.
1590 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1592 char *buf = head->write_buf;
1593 bool global_pid = false;
1595 struct task_struct *p;
1596 struct tomoyo_domain_info *domain = NULL;
1598 /* Accessing write_buf is safe because head->io_sem is held. */
1601 return; /* Do nothing if open(O_RDONLY). */
1603 if (head->r.w_pos || head->r.eof)
1606 if (tomoyo_str_starts(&buf, "global-pid "))
1608 pid = (unsigned int) simple_strtoul(buf, NULL, 10);
1610 read_lock(&tasklist_lock);
1612 p = find_task_by_pid_ns(pid, &init_pid_ns);
1614 p = find_task_by_vpid(pid);
1616 domain = tomoyo_real_domain(p);
1617 read_unlock(&tasklist_lock);
1621 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1622 tomoyo_set_string(head, domain->domainname->name);
1625 /* String table for domain transition control keywords. */
1626 static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
1627 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1628 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1629 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1630 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1631 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1632 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
1635 /* String table for grouping keywords. */
1636 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
1637 [TOMOYO_PATH_GROUP] = "path_group ",
1638 [TOMOYO_NUMBER_GROUP] = "number_group ",
1639 [TOMOYO_ADDRESS_GROUP] = "address_group ",
1643 * tomoyo_write_exception - Write exception policy.
1645 * @head: Pointer to "struct tomoyo_io_buffer".
1647 * Returns 0 on success, negative value otherwise.
1649 * Caller holds tomoyo_read_lock().
1651 static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
1653 const bool is_delete = head->w.is_delete;
1654 struct tomoyo_acl_param param = {
1656 .is_delete = is_delete,
1657 .data = head->write_buf,
1660 if (tomoyo_str_starts(¶m.data, "aggregator "))
1661 return tomoyo_write_aggregator(¶m);
1662 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
1663 if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i]))
1664 return tomoyo_write_transition_control(¶m, i);
1665 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
1666 if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i]))
1667 return tomoyo_write_group(¶m, i);
1668 if (tomoyo_str_starts(¶m.data, "acl_group ")) {
1671 group = simple_strtoul(param.data, &data, 10);
1672 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
1673 return tomoyo_write_domain2
1674 (head->w.ns, &head->w.ns->acl_group[group],
1681 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
1683 * @head: Pointer to "struct tomoyo_io_buffer".
1684 * @idx: Index number.
1686 * Returns true on success, false otherwise.
1688 * Caller holds tomoyo_read_lock().
1690 static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1692 struct tomoyo_policy_namespace *ns =
1693 container_of(head->r.ns, typeof(*ns), namespace_list);
1694 struct list_head *list = &ns->group_list[idx];
1695 list_for_each_cookie(head->r.group, list) {
1696 struct tomoyo_group *group =
1697 list_entry(head->r.group, typeof(*group), head.list);
1698 list_for_each_cookie(head->r.acl, &group->member_list) {
1699 struct tomoyo_acl_head *ptr =
1700 list_entry(head->r.acl, typeof(*ptr), list);
1701 if (ptr->is_deleted)
1703 if (!tomoyo_flush(head))
1705 tomoyo_print_namespace(head);
1706 tomoyo_set_string(head, tomoyo_group_name[idx]);
1707 tomoyo_set_string(head, group->group_name->name);
1708 if (idx == TOMOYO_PATH_GROUP) {
1709 tomoyo_set_space(head);
1710 tomoyo_set_string(head, container_of
1711 (ptr, struct tomoyo_path_group,
1712 head)->member_name->name);
1713 } else if (idx == TOMOYO_NUMBER_GROUP) {
1714 tomoyo_print_number_union(head, &container_of
1716 struct tomoyo_number_group,
1718 } else if (idx == TOMOYO_ADDRESS_GROUP) {
1721 struct tomoyo_address_group *member =
1722 container_of(ptr, typeof(*member),
1724 tomoyo_print_ip(buffer, sizeof(buffer),
1726 tomoyo_io_printf(head, " %s", buffer);
1728 tomoyo_set_lf(head);
1732 head->r.group = NULL;
1737 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1739 * @head: Pointer to "struct tomoyo_io_buffer".
1740 * @idx: Index number.
1742 * Returns true on success, false otherwise.
1744 * Caller holds tomoyo_read_lock().
1746 static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1748 struct tomoyo_policy_namespace *ns =
1749 container_of(head->r.ns, typeof(*ns), namespace_list);
1750 struct list_head *list = &ns->policy_list[idx];
1751 list_for_each_cookie(head->r.acl, list) {
1752 struct tomoyo_acl_head *acl =
1753 container_of(head->r.acl, typeof(*acl), list);
1754 if (acl->is_deleted)
1756 if (!tomoyo_flush(head))
1759 case TOMOYO_ID_TRANSITION_CONTROL:
1761 struct tomoyo_transition_control *ptr =
1762 container_of(acl, typeof(*ptr), head);
1763 tomoyo_print_namespace(head);
1764 tomoyo_set_string(head, tomoyo_transition_type
1766 tomoyo_set_string(head, ptr->program ?
1767 ptr->program->name : "any");
1768 tomoyo_set_string(head, " from ");
1769 tomoyo_set_string(head, ptr->domainname ?
1770 ptr->domainname->name :
1774 case TOMOYO_ID_AGGREGATOR:
1776 struct tomoyo_aggregator *ptr =
1777 container_of(acl, typeof(*ptr), head);
1778 tomoyo_print_namespace(head);
1779 tomoyo_set_string(head, "aggregator ");
1780 tomoyo_set_string(head,
1781 ptr->original_name->name);
1782 tomoyo_set_space(head);
1783 tomoyo_set_string(head,
1784 ptr->aggregated_name->name);
1790 tomoyo_set_lf(head);
1797 * tomoyo_read_exception - Read exception policy.
1799 * @head: Pointer to "struct tomoyo_io_buffer".
1801 * Caller holds tomoyo_read_lock().
1803 static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
1805 struct tomoyo_policy_namespace *ns =
1806 container_of(head->r.ns, typeof(*ns), namespace_list);
1809 while (head->r.step < TOMOYO_MAX_POLICY &&
1810 tomoyo_read_policy(head, head->r.step))
1812 if (head->r.step < TOMOYO_MAX_POLICY)
1814 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1815 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1817 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
1819 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1820 + TOMOYO_MAX_ACL_GROUPS) {
1821 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1823 if (!tomoyo_read_domain2(head, &ns->acl_group
1824 [head->r.acl_group_index]))
1831 /* Wait queue for kernel -> userspace notification. */
1832 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1833 /* Wait queue for userspace -> kernel notification. */
1834 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
1836 /* Structure for query. */
1837 struct tomoyo_query {
1838 struct list_head list;
1841 unsigned int serial;
1847 /* The list for "struct tomoyo_query". */
1848 static LIST_HEAD(tomoyo_query_list);
1850 /* Lock for manipulating tomoyo_query_list. */
1851 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1854 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1857 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1860 * tomoyo_truncate - Truncate a line.
1862 * @str: String to truncate.
1864 * Returns length of truncated @str.
1866 static int tomoyo_truncate(char *str)
1869 while (*(unsigned char *) str > (unsigned char) ' ')
1872 return strlen(start) + 1;
1876 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1878 * @domain: Pointer to "struct tomoyo_domain_info".
1879 * @header: Lines containing ACL.
1883 static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
1886 char *realpath = NULL;
1888 char *symlink = NULL;
1889 char *cp = strchr(header, '\n');
1893 cp = strchr(cp + 1, '\n');
1897 len = strlen(cp) + 1;
1898 /* strstr() will return NULL if ordering is wrong. */
1900 argv0 = strstr(header, " argv[]={ \"");
1903 len += tomoyo_truncate(argv0) + 14;
1905 realpath = strstr(header, " exec={ realpath=\"");
1908 len += tomoyo_truncate(realpath) + 6;
1910 symlink = strstr(header, " symlink.target=\"");
1912 len += tomoyo_truncate(symlink + 1) + 1;
1914 buffer = kmalloc(len, GFP_NOFS);
1917 snprintf(buffer, len - 1, "%s", cp);
1919 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
1921 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
1923 tomoyo_addprintf(buffer, len, "%s", symlink);
1924 tomoyo_normalize_line(buffer);
1925 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
1927 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
1932 * tomoyo_supervisor - Ask for the supervisor's decision.
1934 * @r: Pointer to "struct tomoyo_request_info".
1935 * @fmt: The printf()'s format string, followed by parameters.
1937 * Returns 0 if the supervisor decided to permit the access request which
1938 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1939 * supervisor decided to retry the access request which violated the policy in
1940 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1942 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1947 static unsigned int tomoyo_serial;
1948 struct tomoyo_query entry = { };
1949 bool quota_exceeded = false;
1950 va_start(args, fmt);
1951 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
1953 /* Write /sys/kernel/security/tomoyo/audit. */
1954 va_start(args, fmt);
1955 tomoyo_write_log2(r, len, fmt, args);
1957 /* Nothing more to do if granted. */
1961 tomoyo_update_stat(r->mode);
1963 case TOMOYO_CONFIG_ENFORCING:
1965 if (atomic_read(&tomoyo_query_observers))
1968 case TOMOYO_CONFIG_LEARNING:
1970 /* Check max_learning_entry parameter. */
1971 if (tomoyo_domain_quota_is_ok(r))
1978 va_start(args, fmt);
1979 entry.query = tomoyo_init_log(r, len, fmt, args);
1983 entry.query_len = strlen(entry.query) + 1;
1985 tomoyo_add_entry(r->domain, entry.query);
1988 len = tomoyo_round2(entry.query_len);
1989 spin_lock(&tomoyo_query_list_lock);
1990 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
1991 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
1992 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
1993 quota_exceeded = true;
1995 entry.serial = tomoyo_serial++;
1996 entry.retry = r->retry;
1997 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
1998 list_add_tail(&entry.list, &tomoyo_query_list);
2000 spin_unlock(&tomoyo_query_list_lock);
2003 /* Give 10 seconds for supervisor's opinion. */
2004 while (entry.timer < 10) {
2005 wake_up_all(&tomoyo_query_wait);
2006 if (wait_event_interruptible_timeout
2007 (tomoyo_answer_wait, entry.answer ||
2008 !atomic_read(&tomoyo_query_observers), HZ))
2013 spin_lock(&tomoyo_query_list_lock);
2014 list_del(&entry.list);
2015 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
2016 spin_unlock(&tomoyo_query_list_lock);
2017 switch (entry.answer) {
2018 case 3: /* Asked to retry by administrator. */
2019 error = TOMOYO_RETRY_REQUEST;
2023 /* Granted by administrator. */
2027 /* Timed out or rejected by administrator. */
2036 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2038 * @file: Pointer to "struct file".
2039 * @wait: Pointer to "poll_table".
2041 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
2043 * Waits for access requests which violated policy in enforcing mode.
2045 static int tomoyo_poll_query(struct file *file, poll_table *wait)
2047 struct list_head *tmp;
2050 for (i = 0; i < 2; i++) {
2051 spin_lock(&tomoyo_query_list_lock);
2052 list_for_each(tmp, &tomoyo_query_list) {
2053 struct tomoyo_query *ptr =
2054 list_entry(tmp, typeof(*ptr), list);
2060 spin_unlock(&tomoyo_query_list_lock);
2062 return POLLIN | POLLRDNORM;
2065 poll_wait(file, &tomoyo_query_wait, wait);
2071 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2073 * @head: Pointer to "struct tomoyo_io_buffer".
2075 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
2077 struct list_head *tmp;
2078 unsigned int pos = 0;
2083 if (head->read_buf) {
2084 kfree(head->read_buf);
2085 head->read_buf = NULL;
2087 spin_lock(&tomoyo_query_list_lock);
2088 list_for_each(tmp, &tomoyo_query_list) {
2089 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2092 if (pos++ != head->r.query_index)
2094 len = ptr->query_len;
2097 spin_unlock(&tomoyo_query_list_lock);
2099 head->r.query_index = 0;
2102 buf = kzalloc(len + 32, GFP_NOFS);
2106 spin_lock(&tomoyo_query_list_lock);
2107 list_for_each(tmp, &tomoyo_query_list) {
2108 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2111 if (pos++ != head->r.query_index)
2114 * Some query can be skipped because tomoyo_query_list
2115 * can change, but I don't care.
2117 if (len == ptr->query_len)
2118 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2119 ptr->retry, ptr->query);
2122 spin_unlock(&tomoyo_query_list_lock);
2124 head->read_buf = buf;
2125 head->r.w[head->r.w_pos++] = buf;
2126 head->r.query_index++;
2133 * tomoyo_write_answer - Write the supervisor's decision.
2135 * @head: Pointer to "struct tomoyo_io_buffer".
2137 * Returns 0 on success, -EINVAL otherwise.
2139 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2141 char *data = head->write_buf;
2142 struct list_head *tmp;
2143 unsigned int serial;
2144 unsigned int answer;
2145 spin_lock(&tomoyo_query_list_lock);
2146 list_for_each(tmp, &tomoyo_query_list) {
2147 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2150 spin_unlock(&tomoyo_query_list_lock);
2151 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2153 spin_lock(&tomoyo_query_list_lock);
2154 list_for_each(tmp, &tomoyo_query_list) {
2155 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2156 if (ptr->serial != serial)
2159 ptr->answer = answer;
2162 spin_unlock(&tomoyo_query_list_lock);
2167 * tomoyo_read_version: Get version.
2169 * @head: Pointer to "struct tomoyo_io_buffer".
2171 * Returns version information.
2173 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
2176 tomoyo_io_printf(head, "2.4.0");
2182 * tomoyo_read_self_domain - Get the current process's domainname.
2184 * @head: Pointer to "struct tomoyo_io_buffer".
2186 * Returns the current process's domainname.
2188 static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
2192 * tomoyo_domain()->domainname != NULL
2193 * because every process belongs to a domain and
2194 * the domain's name cannot be NULL.
2196 tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
2201 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2202 static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2203 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2204 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2205 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2206 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2209 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2210 static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2211 [TOMOYO_MEMORY_POLICY] = "policy:",
2212 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2213 [TOMOYO_MEMORY_QUERY] = "query message:",
2216 /* Timestamp counter for last updated. */
2217 static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2218 /* Counter for number of updates. */
2219 static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
2222 * tomoyo_update_stat - Update statistic counters.
2224 * @index: Index for policy type.
2228 void tomoyo_update_stat(const u8 index)
2231 do_gettimeofday(&tv);
2233 * I don't use atomic operations because race condition is not fatal.
2235 tomoyo_stat_updated[index]++;
2236 tomoyo_stat_modified[index] = tv.tv_sec;
2240 * tomoyo_read_stat - Read statistic data.
2242 * @head: Pointer to "struct tomoyo_io_buffer".
2246 static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2249 unsigned int total = 0;
2252 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2253 tomoyo_io_printf(head, "Policy %-30s %10u",
2254 tomoyo_policy_headers[i],
2255 tomoyo_stat_updated[i]);
2256 if (tomoyo_stat_modified[i]) {
2257 struct tomoyo_time stamp;
2258 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
2259 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
2261 stamp.year, stamp.month, stamp.day,
2262 stamp.hour, stamp.min, stamp.sec);
2264 tomoyo_set_lf(head);
2266 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2267 unsigned int used = tomoyo_memory_used[i];
2269 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2270 tomoyo_memory_headers[i], used);
2271 used = tomoyo_memory_quota[i];
2273 tomoyo_io_printf(head, " (Quota: %10u)", used);
2274 tomoyo_set_lf(head);
2276 tomoyo_io_printf(head, "Total memory used: %10u\n",
2282 * tomoyo_write_stat - Set memory quota.
2284 * @head: Pointer to "struct tomoyo_io_buffer".
2288 static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2290 char *data = head->write_buf;
2292 if (tomoyo_str_starts(&data, "Memory used by "))
2293 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2294 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2295 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2300 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2302 * @type: Type of interface.
2303 * @file: Pointer to "struct file".
2305 * Returns 0 on success, negative value otherwise.
2307 int tomoyo_open_control(const u8 type, struct file *file)
2309 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
2313 mutex_init(&head->io_sem);
2316 case TOMOYO_DOMAINPOLICY:
2317 /* /sys/kernel/security/tomoyo/domain_policy */
2318 head->write = tomoyo_write_domain;
2319 head->read = tomoyo_read_domain;
2321 case TOMOYO_EXCEPTIONPOLICY:
2322 /* /sys/kernel/security/tomoyo/exception_policy */
2323 head->write = tomoyo_write_exception;
2324 head->read = tomoyo_read_exception;
2327 /* /sys/kernel/security/tomoyo/audit */
2328 head->poll = tomoyo_poll_log;
2329 head->read = tomoyo_read_log;
2331 case TOMOYO_SELFDOMAIN:
2332 /* /sys/kernel/security/tomoyo/self_domain */
2333 head->read = tomoyo_read_self_domain;
2335 case TOMOYO_PROCESS_STATUS:
2336 /* /sys/kernel/security/tomoyo/.process_status */
2337 head->write = tomoyo_write_pid;
2338 head->read = tomoyo_read_pid;
2340 case TOMOYO_VERSION:
2341 /* /sys/kernel/security/tomoyo/version */
2342 head->read = tomoyo_read_version;
2343 head->readbuf_size = 128;
2346 /* /sys/kernel/security/tomoyo/stat */
2347 head->write = tomoyo_write_stat;
2348 head->read = tomoyo_read_stat;
2349 head->readbuf_size = 1024;
2351 case TOMOYO_PROFILE:
2352 /* /sys/kernel/security/tomoyo/profile */
2353 head->write = tomoyo_write_profile;
2354 head->read = tomoyo_read_profile;
2356 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2357 head->poll = tomoyo_poll_query;
2358 head->write = tomoyo_write_answer;
2359 head->read = tomoyo_read_query;
2361 case TOMOYO_MANAGER:
2362 /* /sys/kernel/security/tomoyo/manager */
2363 head->write = tomoyo_write_manager;
2364 head->read = tomoyo_read_manager;
2367 if (!(file->f_mode & FMODE_READ)) {
2369 * No need to allocate read_buf since it is not opened
2374 } else if (!head->poll) {
2375 /* Don't allocate read_buf for poll() access. */
2376 if (!head->readbuf_size)
2377 head->readbuf_size = 4096 * 2;
2378 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
2379 if (!head->read_buf) {
2384 if (!(file->f_mode & FMODE_WRITE)) {
2386 * No need to allocate write_buf since it is not opened
2390 } else if (head->write) {
2391 head->writebuf_size = 4096 * 2;
2392 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
2393 if (!head->write_buf) {
2394 kfree(head->read_buf);
2400 * If the file is /sys/kernel/security/tomoyo/query , increment the
2402 * The obserber counter is used by tomoyo_supervisor() to see if
2403 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2405 if (type == TOMOYO_QUERY)
2406 atomic_inc(&tomoyo_query_observers);
2407 file->private_data = head;
2408 tomoyo_notify_gc(head, true);
2413 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2415 * @file: Pointer to "struct file".
2416 * @wait: Pointer to "poll_table".
2418 * Waits for read readiness.
2419 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
2420 * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
2422 int tomoyo_poll_control(struct file *file, poll_table *wait)
2424 struct tomoyo_io_buffer *head = file->private_data;
2427 return head->poll(file, wait);
2431 * tomoyo_set_namespace_cursor - Set namespace to read.
2433 * @head: Pointer to "struct tomoyo_io_buffer".
2437 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2439 struct list_head *ns;
2440 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2441 head->type != TOMOYO_PROFILE)
2444 * If this is the first read, or reading previous namespace finished
2445 * and has more namespaces to read, update the namespace cursor.
2448 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2449 /* Clearing is OK because tomoyo_flush() returned true. */
2450 memset(&head->r, 0, sizeof(head->r));
2451 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2456 * tomoyo_has_more_namespace - Check for unread namespaces.
2458 * @head: Pointer to "struct tomoyo_io_buffer".
2460 * Returns true if we have more entries to print, false otherwise.
2462 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2464 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2465 head->type == TOMOYO_PROFILE) && head->r.eof &&
2466 head->r.ns->next != &tomoyo_namespace_list;
2470 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2472 * @head: Pointer to "struct tomoyo_io_buffer".
2473 * @buffer: Poiner to buffer to write to.
2474 * @buffer_len: Size of @buffer.
2476 * Returns bytes read on success, negative value otherwise.
2478 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2479 const int buffer_len)
2486 if (mutex_lock_interruptible(&head->io_sem))
2488 head->read_user_buf = buffer;
2489 head->read_user_buf_avail = buffer_len;
2490 idx = tomoyo_read_lock();
2491 if (tomoyo_flush(head))
2492 /* Call the policy handler. */
2494 tomoyo_set_namespace_cursor(head);
2496 } while (tomoyo_flush(head) &&
2497 tomoyo_has_more_namespace(head));
2498 tomoyo_read_unlock(idx);
2499 len = head->read_user_buf - buffer;
2500 mutex_unlock(&head->io_sem);
2505 * tomoyo_parse_policy - Parse a policy line.
2507 * @head: Poiter to "struct tomoyo_io_buffer".
2508 * @line: Line to parse.
2510 * Returns 0 on success, negative value otherwise.
2512 * Caller holds tomoyo_read_lock().
2514 static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2516 /* Delete request? */
2517 head->w.is_delete = !strncmp(line, "delete ", 7);
2518 if (head->w.is_delete)
2519 memmove(line, line + 7, strlen(line + 7) + 1);
2520 /* Selecting namespace to update. */
2521 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2522 head->type == TOMOYO_PROFILE) {
2524 char *cp = strchr(line, ' ');
2527 head->w.ns = tomoyo_assign_namespace(line);
2528 memmove(line, cp, strlen(cp) + 1);
2532 head->w.ns = &tomoyo_kernel_namespace;
2533 /* Don't allow updating if namespace is invalid. */
2537 /* Do the update. */
2538 return head->write(head);
2542 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2544 * @head: Pointer to "struct tomoyo_io_buffer".
2545 * @buffer: Pointer to buffer to read from.
2546 * @buffer_len: Size of @buffer.
2548 * Returns @buffer_len on success, negative value otherwise.
2550 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2551 const char __user *buffer, const int buffer_len)
2553 int error = buffer_len;
2554 size_t avail_len = buffer_len;
2555 char *cp0 = head->write_buf;
2559 if (!access_ok(VERIFY_READ, buffer, buffer_len))
2561 if (mutex_lock_interruptible(&head->io_sem))
2563 idx = tomoyo_read_lock();
2564 /* Read a line and dispatch it to the policy handler. */
2565 while (avail_len > 0) {
2567 if (head->w.avail >= head->writebuf_size - 1) {
2568 const int len = head->writebuf_size * 2;
2569 char *cp = kzalloc(len, GFP_NOFS);
2574 memmove(cp, cp0, head->w.avail);
2576 head->write_buf = cp;
2578 head->writebuf_size = len;
2580 if (get_user(c, buffer)) {
2586 cp0[head->w.avail++] = c;
2589 cp0[head->w.avail - 1] = '\0';
2591 tomoyo_normalize_line(cp0);
2592 if (!strcmp(cp0, "reset")) {
2593 head->w.ns = &tomoyo_kernel_namespace;
2594 head->w.domain = NULL;
2595 memset(&head->r, 0, sizeof(head->r));
2598 /* Don't allow updating policies by non manager programs. */
2599 switch (head->type) {
2600 case TOMOYO_PROCESS_STATUS:
2601 /* This does not write anything. */
2603 case TOMOYO_DOMAINPOLICY:
2604 if (tomoyo_select_domain(head, cp0))
2607 case TOMOYO_EXCEPTIONPOLICY:
2608 if (!strcmp(cp0, "select transition_only")) {
2609 head->r.print_transition_related_only = true;
2614 if (!tomoyo_manager()) {
2619 switch (tomoyo_parse_policy(head, cp0)) {
2624 switch (head->type) {
2625 case TOMOYO_DOMAINPOLICY:
2626 case TOMOYO_EXCEPTIONPOLICY:
2628 case TOMOYO_PROFILE:
2629 case TOMOYO_MANAGER:
2630 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2639 tomoyo_read_unlock(idx);
2640 mutex_unlock(&head->io_sem);
2645 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2647 * @head: Pointer to "struct tomoyo_io_buffer".
2651 int tomoyo_close_control(struct tomoyo_io_buffer *head)
2654 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2657 if (head->type == TOMOYO_QUERY &&
2658 atomic_dec_and_test(&tomoyo_query_observers))
2659 wake_up_all(&tomoyo_answer_wait);
2660 tomoyo_notify_gc(head, false);
2665 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2667 void tomoyo_check_profile(void)
2669 struct tomoyo_domain_info *domain;
2670 const int idx = tomoyo_read_lock();
2671 tomoyo_policy_loaded = true;
2672 printk(KERN_INFO "TOMOYO: 2.4.0\n");
2673 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
2674 const u8 profile = domain->profile;
2675 const struct tomoyo_policy_namespace *ns = domain->ns;
2676 if (ns->profile_version != 20100903)
2678 "Profile version %u is not supported.\n",
2679 ns->profile_version);
2680 else if (!ns->profile_ptr[profile])
2682 "Profile %u (used by '%s') is not defined.\n",
2683 profile, domain->domainname->name);
2687 "Userland tools for TOMOYO 2.4 must be installed and "
2688 "policy must be initialized.\n");
2689 printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.4/ "
2690 "for more information.\n");
2693 tomoyo_read_unlock(idx);
2694 printk(KERN_INFO "Mandatory Access Control activated.\n");
2698 * tomoyo_load_builtin_policy - Load built-in policy.
2702 void __init tomoyo_load_builtin_policy(void)
2705 * This include file is manually created and contains built-in policy
2706 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2707 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2708 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2710 #include "builtin-policy.h"
2712 const int idx = tomoyo_read_lock();
2713 for (i = 0; i < 5; i++) {
2714 struct tomoyo_io_buffer head = { };
2718 start = tomoyo_builtin_profile;
2719 head.type = TOMOYO_PROFILE;
2720 head.write = tomoyo_write_profile;
2723 start = tomoyo_builtin_exception_policy;
2724 head.type = TOMOYO_EXCEPTIONPOLICY;
2725 head.write = tomoyo_write_exception;
2728 start = tomoyo_builtin_domain_policy;
2729 head.type = TOMOYO_DOMAINPOLICY;
2730 head.write = tomoyo_write_domain;
2733 start = tomoyo_builtin_manager;
2734 head.type = TOMOYO_MANAGER;
2735 head.write = tomoyo_write_manager;
2738 start = tomoyo_builtin_stat;
2739 head.type = TOMOYO_STAT;
2740 head.write = tomoyo_write_stat;
2744 char *end = strchr(start, '\n');
2748 tomoyo_normalize_line(start);
2749 head.write_buf = start;
2750 tomoyo_parse_policy(&head, start);
2754 tomoyo_read_unlock(idx);
2755 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2756 tomoyo_check_profile();