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;
265 static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
269 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
271 * @head: Pointer to "struct tomoyo_io_buffer".
272 * @fmt: The printf()'s format string, followed by parameters.
274 static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
279 size_t pos = head->r.avail;
280 int size = head->readbuf_size - pos;
284 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
286 if (pos + len >= head->readbuf_size) {
290 head->r.avail += len;
291 tomoyo_set_string(head, head->read_buf + pos);
295 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
297 * @head: Pointer to "struct tomoyo_io_buffer".
301 static void tomoyo_set_space(struct tomoyo_io_buffer *head)
303 tomoyo_set_string(head, " ");
307 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
309 * @head: Pointer to "struct tomoyo_io_buffer".
313 static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
315 tomoyo_set_string(head, "\n");
316 return !head->r.w_pos;
320 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
322 * @head: Pointer to "struct tomoyo_io_buffer".
326 static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
328 tomoyo_set_string(head, "/");
331 /* List of namespaces. */
332 LIST_HEAD(tomoyo_namespace_list);
333 /* True if namespace other than tomoyo_kernel_namespace is defined. */
334 static bool tomoyo_namespace_enabled;
337 * tomoyo_init_policy_namespace - Initialize namespace.
339 * @ns: Pointer to "struct tomoyo_policy_namespace".
343 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
346 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
347 INIT_LIST_HEAD(&ns->acl_group[idx]);
348 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
349 INIT_LIST_HEAD(&ns->group_list[idx]);
350 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
351 INIT_LIST_HEAD(&ns->policy_list[idx]);
352 ns->profile_version = 20110903;
353 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
354 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
358 * tomoyo_print_namespace - Print namespace header.
360 * @head: Pointer to "struct tomoyo_io_buffer".
364 static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
366 if (!tomoyo_namespace_enabled)
368 tomoyo_set_string(head,
369 container_of(head->r.ns,
370 struct tomoyo_policy_namespace,
371 namespace_list)->name);
372 tomoyo_set_space(head);
376 * tomoyo_print_name_union - Print a tomoyo_name_union.
378 * @head: Pointer to "struct tomoyo_io_buffer".
379 * @ptr: Pointer to "struct tomoyo_name_union".
381 static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
382 const struct tomoyo_name_union *ptr)
384 tomoyo_set_space(head);
386 tomoyo_set_string(head, "@");
387 tomoyo_set_string(head, ptr->group->group_name->name);
389 tomoyo_set_string(head, ptr->filename->name);
394 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
396 * @head: Pointer to "struct tomoyo_io_buffer".
397 * @ptr: Pointer to "struct tomoyo_name_union".
401 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
402 const struct tomoyo_name_union *ptr)
405 tomoyo_set_string(head, "@");
406 tomoyo_set_string(head, ptr->group->group_name->name);
408 tomoyo_set_string(head, "\"");
409 tomoyo_set_string(head, ptr->filename->name);
410 tomoyo_set_string(head, "\"");
415 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
417 * @head: Pointer to "struct tomoyo_io_buffer".
418 * @ptr: Pointer to "struct tomoyo_number_union".
422 static void tomoyo_print_number_union_nospace
423 (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
426 tomoyo_set_string(head, "@");
427 tomoyo_set_string(head, ptr->group->group_name->name);
430 unsigned long min = ptr->values[0];
431 const unsigned long max = ptr->values[1];
432 u8 min_type = ptr->value_type[0];
433 const u8 max_type = ptr->value_type[1];
436 for (i = 0; i < 2; i++) {
438 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
439 tomoyo_addprintf(buffer, sizeof(buffer),
442 case TOMOYO_VALUE_TYPE_OCTAL:
443 tomoyo_addprintf(buffer, sizeof(buffer),
447 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
451 if (min == max && min_type == max_type)
453 tomoyo_addprintf(buffer, sizeof(buffer), "-");
457 tomoyo_io_printf(head, "%s", buffer);
462 * tomoyo_print_number_union - Print a tomoyo_number_union.
464 * @head: Pointer to "struct tomoyo_io_buffer".
465 * @ptr: Pointer to "struct tomoyo_number_union".
469 static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
470 const struct tomoyo_number_union *ptr)
472 tomoyo_set_space(head);
473 tomoyo_print_number_union_nospace(head, ptr);
477 * tomoyo_assign_profile - Create a new profile.
479 * @ns: Pointer to "struct tomoyo_policy_namespace".
480 * @profile: Profile number to create.
482 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
484 static struct tomoyo_profile *tomoyo_assign_profile
485 (struct tomoyo_policy_namespace *ns, const unsigned int profile)
487 struct tomoyo_profile *ptr;
488 struct tomoyo_profile *entry;
489 if (profile >= TOMOYO_MAX_PROFILES)
491 ptr = ns->profile_ptr[profile];
494 entry = kzalloc(sizeof(*entry), GFP_NOFS);
495 if (mutex_lock_interruptible(&tomoyo_policy_lock))
497 ptr = ns->profile_ptr[profile];
498 if (!ptr && tomoyo_memory_ok(entry)) {
500 ptr->default_config = TOMOYO_CONFIG_DISABLED |
501 TOMOYO_CONFIG_WANT_GRANT_LOG |
502 TOMOYO_CONFIG_WANT_REJECT_LOG;
503 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
504 sizeof(ptr->config));
505 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] =
506 CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG;
507 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] =
508 CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY;
509 mb(); /* Avoid out-of-order execution. */
510 ns->profile_ptr[profile] = ptr;
513 mutex_unlock(&tomoyo_policy_lock);
520 * tomoyo_profile - Find a profile.
522 * @ns: Pointer to "struct tomoyo_policy_namespace".
523 * @profile: Profile number to find.
525 * Returns pointer to "struct tomoyo_profile".
527 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
530 static struct tomoyo_profile tomoyo_null_profile;
531 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
533 ptr = &tomoyo_null_profile;
538 * tomoyo_find_yesno - Find values for specified keyword.
540 * @string: String to check.
541 * @find: Name of keyword.
543 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
545 static s8 tomoyo_find_yesno(const char *string, const char *find)
547 const char *cp = strstr(string, find);
550 if (!strncmp(cp, "=yes", 4))
552 else if (!strncmp(cp, "=no", 3))
559 * tomoyo_set_uint - Set value for specified preference.
561 * @i: Pointer to "unsigned int".
562 * @string: String to check.
563 * @find: Name of keyword.
567 static void tomoyo_set_uint(unsigned int *i, const char *string,
570 const char *cp = strstr(string, find);
572 sscanf(cp + strlen(find), "=%u", i);
576 * tomoyo_set_mode - Set mode for specified profile.
578 * @name: Name of functionality.
579 * @value: Mode for @name.
580 * @profile: Pointer to "struct tomoyo_profile".
582 * Returns 0 on success, negative value otherwise.
584 static int tomoyo_set_mode(char *name, const char *value,
585 struct tomoyo_profile *profile)
589 if (!strcmp(name, "CONFIG")) {
590 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
591 config = profile->default_config;
592 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
594 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
595 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
597 if (i < TOMOYO_MAX_MAC_INDEX) {
598 const u8 c = tomoyo_index2category[i];
599 const char *category =
600 tomoyo_category_keywords[c];
601 len = strlen(category);
602 if (strncmp(name, category, len) ||
603 name[len++] != ':' || name[len++] != ':')
606 if (strcmp(name + len, tomoyo_mac_keywords[i]))
608 config = profile->config[i];
611 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
616 if (strstr(value, "use_default")) {
617 config = TOMOYO_CONFIG_USE_DEFAULT;
620 for (mode = 0; mode < 4; mode++)
621 if (strstr(value, tomoyo_mode[mode]))
623 * Update lower 3 bits in order to distinguish
624 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
626 config = (config & ~7) | mode;
627 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
628 switch (tomoyo_find_yesno(value, "grant_log")) {
630 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
633 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
636 switch (tomoyo_find_yesno(value, "reject_log")) {
638 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
641 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
646 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
647 profile->config[i] = config;
648 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
649 profile->default_config = config;
654 * tomoyo_write_profile - Write profile table.
656 * @head: Pointer to "struct tomoyo_io_buffer".
658 * Returns 0 on success, negative value otherwise.
660 static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
662 char *data = head->write_buf;
665 struct tomoyo_profile *profile;
666 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
669 i = simple_strtoul(data, &cp, 10);
673 profile = tomoyo_assign_profile(head->w.ns, i);
676 cp = strchr(data, '=');
680 if (!strcmp(data, "COMMENT")) {
681 static DEFINE_SPINLOCK(lock);
682 const struct tomoyo_path_info *new_comment
683 = tomoyo_get_name(cp);
684 const struct tomoyo_path_info *old_comment;
688 old_comment = profile->comment;
689 profile->comment = new_comment;
691 tomoyo_put_name(old_comment);
694 if (!strcmp(data, "PREFERENCE")) {
695 for (i = 0; i < TOMOYO_MAX_PREF; i++)
696 tomoyo_set_uint(&profile->pref[i], cp,
697 tomoyo_pref_keywords[i]);
700 return tomoyo_set_mode(data, cp, profile);
704 * tomoyo_print_config - Print mode for specified functionality.
706 * @head: Pointer to "struct tomoyo_io_buffer".
707 * @config: Mode for that functionality.
711 * Caller prints functionality's name.
713 static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
715 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
716 tomoyo_mode[config & 3],
717 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
718 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
722 * tomoyo_read_profile - Read profile table.
724 * @head: Pointer to "struct tomoyo_io_buffer".
728 static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
731 struct tomoyo_policy_namespace *ns =
732 container_of(head->r.ns, typeof(*ns), namespace_list);
733 const struct tomoyo_profile *profile;
737 index = head->r.index;
738 profile = ns->profile_ptr[index];
739 switch (head->r.step) {
741 tomoyo_print_namespace(head);
742 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
743 ns->profile_version);
747 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
749 if (ns->profile_ptr[head->r.index])
751 if (head->r.index == TOMOYO_MAX_PROFILES) {
760 const struct tomoyo_path_info *comment =
762 tomoyo_print_namespace(head);
763 tomoyo_io_printf(head, "%u-COMMENT=", index);
764 tomoyo_set_string(head, comment ? comment->name : "");
766 tomoyo_print_namespace(head);
767 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
768 for (i = 0; i < TOMOYO_MAX_PREF; i++)
769 tomoyo_io_printf(head, "%s=%u ",
770 tomoyo_pref_keywords[i],
772 tomoyo_set_string(head, "}\n");
778 tomoyo_print_namespace(head);
779 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
780 tomoyo_print_config(head, profile->default_config);
786 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
787 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
788 const u8 i = head->r.bit;
789 const u8 config = profile->config[i];
790 if (config == TOMOYO_CONFIG_USE_DEFAULT)
792 tomoyo_print_namespace(head);
793 if (i < TOMOYO_MAX_MAC_INDEX)
794 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
796 tomoyo_category_keywords
797 [tomoyo_index2category[i]],
798 tomoyo_mac_keywords[i]);
800 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
801 tomoyo_mac_keywords[i]);
802 tomoyo_print_config(head, config);
806 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
807 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
813 if (tomoyo_flush(head))
818 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
820 * @a: Pointer to "struct tomoyo_acl_head".
821 * @b: Pointer to "struct tomoyo_acl_head".
823 * Returns true if @a == @b, false otherwise.
825 static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
826 const struct tomoyo_acl_head *b)
828 return container_of(a, struct tomoyo_manager, head)->manager ==
829 container_of(b, struct tomoyo_manager, head)->manager;
833 * tomoyo_update_manager_entry - Add a manager entry.
835 * @manager: The path to manager or the domainnamme.
836 * @is_delete: True if it is a delete request.
838 * Returns 0 on success, negative value otherwise.
840 * Caller holds tomoyo_read_lock().
842 static int tomoyo_update_manager_entry(const char *manager,
843 const bool is_delete)
845 struct tomoyo_manager e = { };
846 struct tomoyo_acl_param param = {
847 /* .ns = &tomoyo_kernel_namespace, */
848 .is_delete = is_delete,
849 .list = &tomoyo_kernel_namespace.
850 policy_list[TOMOYO_ID_MANAGER],
852 int error = is_delete ? -ENOENT : -ENOMEM;
853 if (tomoyo_domain_def(manager)) {
854 if (!tomoyo_correct_domain(manager))
858 if (!tomoyo_correct_path(manager))
861 e.manager = tomoyo_get_name(manager);
863 error = tomoyo_update_policy(&e.head, sizeof(e), ¶m,
864 tomoyo_same_manager);
865 tomoyo_put_name(e.manager);
871 * tomoyo_write_manager - Write manager policy.
873 * @head: Pointer to "struct tomoyo_io_buffer".
875 * Returns 0 on success, negative value otherwise.
877 * Caller holds tomoyo_read_lock().
879 static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
881 char *data = head->write_buf;
883 if (!strcmp(data, "manage_by_non_root")) {
884 tomoyo_manage_by_non_root = !head->w.is_delete;
887 return tomoyo_update_manager_entry(data, head->w.is_delete);
891 * tomoyo_read_manager - Read manager policy.
893 * @head: Pointer to "struct tomoyo_io_buffer".
895 * Caller holds tomoyo_read_lock().
897 static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
901 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.
902 policy_list[TOMOYO_ID_MANAGER]) {
903 struct tomoyo_manager *ptr =
904 list_entry(head->r.acl, typeof(*ptr), head.list);
905 if (ptr->head.is_deleted)
907 if (!tomoyo_flush(head))
909 tomoyo_set_string(head, ptr->manager->name);
916 * tomoyo_manager - Check whether the current process is a policy manager.
918 * Returns true if the current process is permitted to modify policy
919 * via /sys/kernel/security/tomoyo/ interface.
921 * Caller holds tomoyo_read_lock().
923 static bool tomoyo_manager(void)
925 struct tomoyo_manager *ptr;
927 const struct task_struct *task = current;
928 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
931 if (!tomoyo_policy_loaded)
933 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
935 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
936 policy_list[TOMOYO_ID_MANAGER], head.list) {
937 if (!ptr->head.is_deleted && ptr->is_domain
938 && !tomoyo_pathcmp(domainname, ptr->manager)) {
945 exe = tomoyo_get_exe();
948 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
949 policy_list[TOMOYO_ID_MANAGER], head.list) {
950 if (!ptr->head.is_deleted && !ptr->is_domain
951 && !strcmp(exe, ptr->manager->name)) {
956 if (!found) { /* Reduce error messages. */
957 static pid_t last_pid;
958 const pid_t pid = current->pid;
959 if (last_pid != pid) {
960 printk(KERN_WARNING "%s ( %s ) is not permitted to "
961 "update policies.\n", domainname->name, exe);
970 * tomoyo_select_domain - Parse select command.
972 * @head: Pointer to "struct tomoyo_io_buffer".
973 * @data: String to parse.
975 * Returns true on success, false otherwise.
977 * Caller holds tomoyo_read_lock().
979 static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
983 struct tomoyo_domain_info *domain = NULL;
984 bool global_pid = false;
985 if (strncmp(data, "select ", 7))
988 if (sscanf(data, "pid=%u", &pid) == 1 ||
989 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
990 struct task_struct *p;
993 p = find_task_by_pid_ns(pid, &init_pid_ns);
995 p = find_task_by_vpid(pid);
997 domain = tomoyo_real_domain(p);
999 } else if (!strncmp(data, "domain=", 7)) {
1000 if (tomoyo_domain_def(data + 7))
1001 domain = tomoyo_find_domain(data + 7);
1004 head->w.domain = domain;
1005 /* Accessing read_buf is safe because head->io_sem is held. */
1006 if (!head->read_buf)
1007 return true; /* Do nothing if open(O_WRONLY). */
1008 memset(&head->r, 0, sizeof(head->r));
1009 head->r.print_this_domain_only = true;
1011 head->r.domain = &domain->list;
1014 tomoyo_io_printf(head, "# select %s\n", data);
1015 if (domain && domain->is_deleted)
1016 tomoyo_io_printf(head, "# This is a deleted domain.\n");
1021 * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
1023 * @a: Pointer to "struct tomoyo_acl_info".
1024 * @b: Pointer to "struct tomoyo_acl_info".
1026 * Returns true if @a == @b, false otherwise.
1028 static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a,
1029 const struct tomoyo_acl_info *b)
1031 const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head);
1032 const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head);
1033 return p1->domainname == p2->domainname;
1037 * tomoyo_write_task - Update task related list.
1039 * @param: Pointer to "struct tomoyo_acl_param".
1041 * Returns 0 on success, negative value otherwise.
1043 * Caller holds tomoyo_read_lock().
1045 static int tomoyo_write_task(struct tomoyo_acl_param *param)
1047 int error = -EINVAL;
1048 if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) {
1049 struct tomoyo_task_acl e = {
1050 .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL,
1051 .domainname = tomoyo_get_domainname(param),
1054 error = tomoyo_update_domain(&e.head, sizeof(e), param,
1055 tomoyo_same_task_acl,
1057 tomoyo_put_name(e.domainname);
1063 * tomoyo_delete_domain - Delete a domain.
1065 * @domainname: The name of domain.
1069 * Caller holds tomoyo_read_lock().
1071 static int tomoyo_delete_domain(char *domainname)
1073 struct tomoyo_domain_info *domain;
1074 struct tomoyo_path_info name;
1076 name.name = domainname;
1077 tomoyo_fill_path_info(&name);
1078 if (mutex_lock_interruptible(&tomoyo_policy_lock))
1080 /* Is there an active domain? */
1081 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
1082 /* Never delete tomoyo_kernel_domain */
1083 if (domain == &tomoyo_kernel_domain)
1085 if (domain->is_deleted ||
1086 tomoyo_pathcmp(domain->domainname, &name))
1088 domain->is_deleted = true;
1091 mutex_unlock(&tomoyo_policy_lock);
1096 * tomoyo_write_domain2 - Write domain policy.
1098 * @ns: Pointer to "struct tomoyo_policy_namespace".
1099 * @list: Pointer to "struct list_head".
1100 * @data: Policy to be interpreted.
1101 * @is_delete: True if it is a delete request.
1103 * Returns 0 on success, negative value otherwise.
1105 * Caller holds tomoyo_read_lock().
1107 static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1108 struct list_head *list, char *data,
1109 const bool is_delete)
1111 struct tomoyo_acl_param param = {
1115 .is_delete = is_delete,
1117 static const struct {
1118 const char *keyword;
1119 int (*write) (struct tomoyo_acl_param *);
1120 } tomoyo_callback[5] = {
1121 { "file ", tomoyo_write_file },
1122 { "network inet ", tomoyo_write_inet_network },
1123 { "network unix ", tomoyo_write_unix_network },
1124 { "misc ", tomoyo_write_misc },
1125 { "task ", tomoyo_write_task },
1129 for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
1130 if (!tomoyo_str_starts(¶m.data,
1131 tomoyo_callback[i].keyword))
1133 return tomoyo_callback[i].write(¶m);
1138 /* String table for domain flags. */
1139 const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1140 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1141 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1145 * tomoyo_write_domain - Write domain policy.
1147 * @head: Pointer to "struct tomoyo_io_buffer".
1149 * Returns 0 on success, negative value otherwise.
1151 * Caller holds tomoyo_read_lock().
1153 static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
1155 char *data = head->write_buf;
1156 struct tomoyo_policy_namespace *ns;
1157 struct tomoyo_domain_info *domain = head->w.domain;
1158 const bool is_delete = head->w.is_delete;
1159 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
1160 unsigned int profile;
1164 tomoyo_delete_domain(data);
1166 domain = tomoyo_find_domain(data);
1168 domain = tomoyo_assign_domain(data, false);
1169 head->w.domain = domain;
1175 if (sscanf(data, "use_profile %u", &profile) == 1
1176 && profile < TOMOYO_MAX_PROFILES) {
1177 if (!tomoyo_policy_loaded || ns->profile_ptr[profile])
1178 domain->profile = (u8) profile;
1181 if (sscanf(data, "use_group %u\n", &profile) == 1
1182 && profile < TOMOYO_MAX_ACL_GROUPS) {
1184 domain->group = (u8) profile;
1187 for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) {
1188 const char *cp = tomoyo_dif[profile];
1189 if (strncmp(data, cp, strlen(cp) - 1))
1191 domain->flags[profile] = !is_delete;
1194 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1199 * tomoyo_print_condition - Print condition part.
1201 * @head: Pointer to "struct tomoyo_io_buffer".
1202 * @cond: Pointer to "struct tomoyo_condition".
1204 * Returns true on success, false otherwise.
1206 static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1207 const struct tomoyo_condition *cond)
1209 switch (head->r.cond_step) {
1211 head->r.cond_index = 0;
1212 head->r.cond_step++;
1213 if (cond->transit) {
1214 tomoyo_set_space(head);
1215 tomoyo_set_string(head, cond->transit->name);
1220 const u16 condc = cond->condc;
1221 const struct tomoyo_condition_element *condp =
1222 (typeof(condp)) (cond + 1);
1223 const struct tomoyo_number_union *numbers_p =
1224 (typeof(numbers_p)) (condp + condc);
1225 const struct tomoyo_name_union *names_p =
1227 (numbers_p + cond->numbers_count);
1228 const struct tomoyo_argv *argv =
1229 (typeof(argv)) (names_p + cond->names_count);
1230 const struct tomoyo_envp *envp =
1231 (typeof(envp)) (argv + cond->argc);
1233 for (skip = 0; skip < head->r.cond_index; skip++) {
1234 const u8 left = condp->left;
1235 const u8 right = condp->right;
1238 case TOMOYO_ARGV_ENTRY:
1241 case TOMOYO_ENVP_ENTRY:
1244 case TOMOYO_NUMBER_UNION:
1249 case TOMOYO_NAME_UNION:
1252 case TOMOYO_NUMBER_UNION:
1257 while (head->r.cond_index < condc) {
1258 const u8 match = condp->equals;
1259 const u8 left = condp->left;
1260 const u8 right = condp->right;
1261 if (!tomoyo_flush(head))
1264 head->r.cond_index++;
1265 tomoyo_set_space(head);
1267 case TOMOYO_ARGV_ENTRY:
1268 tomoyo_io_printf(head,
1269 "exec.argv[%lu]%s=\"",
1272 tomoyo_set_string(head,
1274 tomoyo_set_string(head, "\"");
1277 case TOMOYO_ENVP_ENTRY:
1278 tomoyo_set_string(head,
1280 tomoyo_set_string(head,
1282 tomoyo_io_printf(head, "\"]%s=", envp->
1285 tomoyo_set_string(head, "\"");
1286 tomoyo_set_string(head, envp->
1288 tomoyo_set_string(head, "\"");
1290 tomoyo_set_string(head,
1295 case TOMOYO_NUMBER_UNION:
1296 tomoyo_print_number_union_nospace
1297 (head, numbers_p++);
1300 tomoyo_set_string(head,
1301 tomoyo_condition_keyword[left]);
1304 tomoyo_set_string(head, match ? "=" : "!=");
1306 case TOMOYO_NAME_UNION:
1307 tomoyo_print_name_union_quoted
1310 case TOMOYO_NUMBER_UNION:
1311 tomoyo_print_number_union_nospace
1312 (head, numbers_p++);
1315 tomoyo_set_string(head,
1316 tomoyo_condition_keyword[right]);
1321 head->r.cond_step++;
1324 if (!tomoyo_flush(head))
1326 head->r.cond_step++;
1329 if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
1330 tomoyo_io_printf(head, " grant_log=%s",
1331 tomoyo_yesno(cond->grant_log ==
1332 TOMOYO_GRANTLOG_YES));
1333 tomoyo_set_lf(head);
1340 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1342 * @head: Pointer to "struct tomoyo_io_buffer".
1343 * @category: Category name.
1347 static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1348 const char *category)
1350 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1351 tomoyo_print_namespace(head);
1352 tomoyo_io_printf(head, "acl_group %u ",
1353 head->r.acl_group_index);
1355 tomoyo_set_string(head, category);
1359 * tomoyo_print_entry - Print an ACL entry.
1361 * @head: Pointer to "struct tomoyo_io_buffer".
1362 * @acl: Pointer to an ACL entry.
1364 * Returns true on success, false otherwise.
1366 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
1367 struct tomoyo_acl_info *acl)
1369 const u8 acl_type = acl->type;
1373 if (head->r.print_cond_part)
1374 goto print_cond_part;
1375 if (acl->is_deleted)
1377 if (!tomoyo_flush(head))
1379 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
1380 struct tomoyo_path_acl *ptr =
1381 container_of(acl, typeof(*ptr), head);
1382 const u16 perm = ptr->perm;
1383 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
1384 if (!(perm & (1 << bit)))
1386 if (head->r.print_transition_related_only &&
1387 bit != TOMOYO_TYPE_EXECUTE)
1390 tomoyo_set_group(head, "file ");
1393 tomoyo_set_slash(head);
1395 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
1399 tomoyo_print_name_union(head, &ptr->name);
1400 } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) {
1401 struct tomoyo_task_acl *ptr =
1402 container_of(acl, typeof(*ptr), head);
1403 tomoyo_set_group(head, "task ");
1404 tomoyo_set_string(head, "manual_domain_transition ");
1405 tomoyo_set_string(head, ptr->domainname->name);
1406 } else if (head->r.print_transition_related_only) {
1408 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1409 struct tomoyo_path2_acl *ptr =
1410 container_of(acl, typeof(*ptr), head);
1411 const u8 perm = ptr->perm;
1412 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1413 if (!(perm & (1 << bit)))
1416 tomoyo_set_group(head, "file ");
1419 tomoyo_set_slash(head);
1421 tomoyo_set_string(head, tomoyo_mac_keywords
1422 [tomoyo_pp2mac[bit]]);
1426 tomoyo_print_name_union(head, &ptr->name1);
1427 tomoyo_print_name_union(head, &ptr->name2);
1428 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1429 struct tomoyo_path_number_acl *ptr =
1430 container_of(acl, typeof(*ptr), head);
1431 const u8 perm = ptr->perm;
1432 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1433 if (!(perm & (1 << bit)))
1436 tomoyo_set_group(head, "file ");
1439 tomoyo_set_slash(head);
1441 tomoyo_set_string(head, tomoyo_mac_keywords
1442 [tomoyo_pn2mac[bit]]);
1446 tomoyo_print_name_union(head, &ptr->name);
1447 tomoyo_print_number_union(head, &ptr->number);
1448 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1449 struct tomoyo_mkdev_acl *ptr =
1450 container_of(acl, typeof(*ptr), head);
1451 const u8 perm = ptr->perm;
1452 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1453 if (!(perm & (1 << bit)))
1456 tomoyo_set_group(head, "file ");
1459 tomoyo_set_slash(head);
1461 tomoyo_set_string(head, tomoyo_mac_keywords
1462 [tomoyo_pnnn2mac[bit]]);
1466 tomoyo_print_name_union(head, &ptr->name);
1467 tomoyo_print_number_union(head, &ptr->mode);
1468 tomoyo_print_number_union(head, &ptr->major);
1469 tomoyo_print_number_union(head, &ptr->minor);
1470 } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
1471 struct tomoyo_inet_acl *ptr =
1472 container_of(acl, typeof(*ptr), head);
1473 const u8 perm = ptr->perm;
1475 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1476 if (!(perm & (1 << bit)))
1479 tomoyo_set_group(head, "network inet ");
1480 tomoyo_set_string(head, tomoyo_proto_keyword
1482 tomoyo_set_space(head);
1485 tomoyo_set_slash(head);
1487 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1491 tomoyo_set_space(head);
1492 if (ptr->address.group) {
1493 tomoyo_set_string(head, "@");
1494 tomoyo_set_string(head, ptr->address.group->group_name
1498 tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
1499 tomoyo_io_printf(head, "%s", buf);
1501 tomoyo_print_number_union(head, &ptr->port);
1502 } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
1503 struct tomoyo_unix_acl *ptr =
1504 container_of(acl, typeof(*ptr), head);
1505 const u8 perm = ptr->perm;
1507 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1508 if (!(perm & (1 << bit)))
1511 tomoyo_set_group(head, "network unix ");
1512 tomoyo_set_string(head, tomoyo_proto_keyword
1514 tomoyo_set_space(head);
1517 tomoyo_set_slash(head);
1519 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1523 tomoyo_print_name_union(head, &ptr->name);
1524 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1525 struct tomoyo_mount_acl *ptr =
1526 container_of(acl, typeof(*ptr), head);
1527 tomoyo_set_group(head, "file mount");
1528 tomoyo_print_name_union(head, &ptr->dev_name);
1529 tomoyo_print_name_union(head, &ptr->dir_name);
1530 tomoyo_print_name_union(head, &ptr->fs_type);
1531 tomoyo_print_number_union(head, &ptr->flags);
1532 } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
1533 struct tomoyo_env_acl *ptr =
1534 container_of(acl, typeof(*ptr), head);
1536 tomoyo_set_group(head, "misc env ");
1537 tomoyo_set_string(head, ptr->env->name);
1540 head->r.print_cond_part = true;
1541 head->r.cond_step = 0;
1542 if (!tomoyo_flush(head))
1545 if (!tomoyo_print_condition(head, acl->cond))
1547 head->r.print_cond_part = false;
1549 tomoyo_set_lf(head);
1555 * tomoyo_read_domain2 - Read domain policy.
1557 * @head: Pointer to "struct tomoyo_io_buffer".
1558 * @list: Pointer to "struct list_head".
1560 * Caller holds tomoyo_read_lock().
1562 * Returns true on success, false otherwise.
1564 static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
1565 struct list_head *list)
1567 list_for_each_cookie(head->r.acl, list) {
1568 struct tomoyo_acl_info *ptr =
1569 list_entry(head->r.acl, typeof(*ptr), list);
1570 if (!tomoyo_print_entry(head, ptr))
1578 * tomoyo_read_domain - Read domain policy.
1580 * @head: Pointer to "struct tomoyo_io_buffer".
1582 * Caller holds tomoyo_read_lock().
1584 static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
1588 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
1589 struct tomoyo_domain_info *domain =
1590 list_entry(head->r.domain, typeof(*domain), list);
1591 switch (head->r.step) {
1594 if (domain->is_deleted &&
1595 !head->r.print_this_domain_only)
1597 /* Print domainname and flags. */
1598 tomoyo_set_string(head, domain->domainname->name);
1599 tomoyo_set_lf(head);
1600 tomoyo_io_printf(head, "use_profile %u\n",
1602 tomoyo_io_printf(head, "use_group %u\n",
1604 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1605 if (domain->flags[i])
1606 tomoyo_set_string(head, tomoyo_dif[i]);
1608 tomoyo_set_lf(head);
1611 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
1614 if (!tomoyo_set_lf(head))
1619 if (head->r.print_this_domain_only)
1628 * tomoyo_write_pid: Specify PID to obtain domainname.
1630 * @head: Pointer to "struct tomoyo_io_buffer".
1634 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1636 head->r.eof = false;
1641 * tomoyo_read_pid - Get domainname of the specified PID.
1643 * @head: Pointer to "struct tomoyo_io_buffer".
1645 * Returns the domainname which the specified PID is in on success,
1646 * empty string otherwise.
1647 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1648 * using read()/write() interface rather than sysctl() interface.
1650 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1652 char *buf = head->write_buf;
1653 bool global_pid = false;
1655 struct task_struct *p;
1656 struct tomoyo_domain_info *domain = NULL;
1658 /* Accessing write_buf is safe because head->io_sem is held. */
1661 return; /* Do nothing if open(O_RDONLY). */
1663 if (head->r.w_pos || head->r.eof)
1666 if (tomoyo_str_starts(&buf, "global-pid "))
1668 pid = (unsigned int) simple_strtoul(buf, NULL, 10);
1671 p = find_task_by_pid_ns(pid, &init_pid_ns);
1673 p = find_task_by_vpid(pid);
1675 domain = tomoyo_real_domain(p);
1679 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1680 tomoyo_set_string(head, domain->domainname->name);
1683 /* String table for domain transition control keywords. */
1684 static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
1685 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1686 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1687 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1688 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1689 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1690 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
1693 /* String table for grouping keywords. */
1694 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
1695 [TOMOYO_PATH_GROUP] = "path_group ",
1696 [TOMOYO_NUMBER_GROUP] = "number_group ",
1697 [TOMOYO_ADDRESS_GROUP] = "address_group ",
1701 * tomoyo_write_exception - Write exception policy.
1703 * @head: Pointer to "struct tomoyo_io_buffer".
1705 * Returns 0 on success, negative value otherwise.
1707 * Caller holds tomoyo_read_lock().
1709 static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
1711 const bool is_delete = head->w.is_delete;
1712 struct tomoyo_acl_param param = {
1714 .is_delete = is_delete,
1715 .data = head->write_buf,
1718 if (tomoyo_str_starts(¶m.data, "aggregator "))
1719 return tomoyo_write_aggregator(¶m);
1720 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
1721 if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i]))
1722 return tomoyo_write_transition_control(¶m, i);
1723 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
1724 if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i]))
1725 return tomoyo_write_group(¶m, i);
1726 if (tomoyo_str_starts(¶m.data, "acl_group ")) {
1729 group = simple_strtoul(param.data, &data, 10);
1730 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
1731 return tomoyo_write_domain2
1732 (head->w.ns, &head->w.ns->acl_group[group],
1739 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
1741 * @head: Pointer to "struct tomoyo_io_buffer".
1742 * @idx: Index number.
1744 * Returns true on success, false otherwise.
1746 * Caller holds tomoyo_read_lock().
1748 static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1750 struct tomoyo_policy_namespace *ns =
1751 container_of(head->r.ns, typeof(*ns), namespace_list);
1752 struct list_head *list = &ns->group_list[idx];
1753 list_for_each_cookie(head->r.group, list) {
1754 struct tomoyo_group *group =
1755 list_entry(head->r.group, typeof(*group), head.list);
1756 list_for_each_cookie(head->r.acl, &group->member_list) {
1757 struct tomoyo_acl_head *ptr =
1758 list_entry(head->r.acl, typeof(*ptr), list);
1759 if (ptr->is_deleted)
1761 if (!tomoyo_flush(head))
1763 tomoyo_print_namespace(head);
1764 tomoyo_set_string(head, tomoyo_group_name[idx]);
1765 tomoyo_set_string(head, group->group_name->name);
1766 if (idx == TOMOYO_PATH_GROUP) {
1767 tomoyo_set_space(head);
1768 tomoyo_set_string(head, container_of
1769 (ptr, struct tomoyo_path_group,
1770 head)->member_name->name);
1771 } else if (idx == TOMOYO_NUMBER_GROUP) {
1772 tomoyo_print_number_union(head, &container_of
1774 struct tomoyo_number_group,
1776 } else if (idx == TOMOYO_ADDRESS_GROUP) {
1779 struct tomoyo_address_group *member =
1780 container_of(ptr, typeof(*member),
1782 tomoyo_print_ip(buffer, sizeof(buffer),
1784 tomoyo_io_printf(head, " %s", buffer);
1786 tomoyo_set_lf(head);
1790 head->r.group = NULL;
1795 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1797 * @head: Pointer to "struct tomoyo_io_buffer".
1798 * @idx: Index number.
1800 * Returns true on success, false otherwise.
1802 * Caller holds tomoyo_read_lock().
1804 static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1806 struct tomoyo_policy_namespace *ns =
1807 container_of(head->r.ns, typeof(*ns), namespace_list);
1808 struct list_head *list = &ns->policy_list[idx];
1809 list_for_each_cookie(head->r.acl, list) {
1810 struct tomoyo_acl_head *acl =
1811 container_of(head->r.acl, typeof(*acl), list);
1812 if (acl->is_deleted)
1814 if (!tomoyo_flush(head))
1817 case TOMOYO_ID_TRANSITION_CONTROL:
1819 struct tomoyo_transition_control *ptr =
1820 container_of(acl, typeof(*ptr), head);
1821 tomoyo_print_namespace(head);
1822 tomoyo_set_string(head, tomoyo_transition_type
1824 tomoyo_set_string(head, ptr->program ?
1825 ptr->program->name : "any");
1826 tomoyo_set_string(head, " from ");
1827 tomoyo_set_string(head, ptr->domainname ?
1828 ptr->domainname->name :
1832 case TOMOYO_ID_AGGREGATOR:
1834 struct tomoyo_aggregator *ptr =
1835 container_of(acl, typeof(*ptr), head);
1836 tomoyo_print_namespace(head);
1837 tomoyo_set_string(head, "aggregator ");
1838 tomoyo_set_string(head,
1839 ptr->original_name->name);
1840 tomoyo_set_space(head);
1841 tomoyo_set_string(head,
1842 ptr->aggregated_name->name);
1848 tomoyo_set_lf(head);
1855 * tomoyo_read_exception - Read exception policy.
1857 * @head: Pointer to "struct tomoyo_io_buffer".
1859 * Caller holds tomoyo_read_lock().
1861 static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
1863 struct tomoyo_policy_namespace *ns =
1864 container_of(head->r.ns, typeof(*ns), namespace_list);
1867 while (head->r.step < TOMOYO_MAX_POLICY &&
1868 tomoyo_read_policy(head, head->r.step))
1870 if (head->r.step < TOMOYO_MAX_POLICY)
1872 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1873 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1875 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
1877 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1878 + TOMOYO_MAX_ACL_GROUPS) {
1879 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1881 if (!tomoyo_read_domain2(head, &ns->acl_group
1882 [head->r.acl_group_index]))
1889 /* Wait queue for kernel -> userspace notification. */
1890 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1891 /* Wait queue for userspace -> kernel notification. */
1892 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
1894 /* Structure for query. */
1895 struct tomoyo_query {
1896 struct list_head list;
1899 unsigned int serial;
1905 /* The list for "struct tomoyo_query". */
1906 static LIST_HEAD(tomoyo_query_list);
1908 /* Lock for manipulating tomoyo_query_list. */
1909 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1912 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1915 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1918 * tomoyo_truncate - Truncate a line.
1920 * @str: String to truncate.
1922 * Returns length of truncated @str.
1924 static int tomoyo_truncate(char *str)
1927 while (*(unsigned char *) str > (unsigned char) ' ')
1930 return strlen(start) + 1;
1934 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1936 * @domain: Pointer to "struct tomoyo_domain_info".
1937 * @header: Lines containing ACL.
1941 static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
1944 char *realpath = NULL;
1946 char *symlink = NULL;
1947 char *cp = strchr(header, '\n');
1951 cp = strchr(cp + 1, '\n');
1955 len = strlen(cp) + 1;
1956 /* strstr() will return NULL if ordering is wrong. */
1958 argv0 = strstr(header, " argv[]={ \"");
1961 len += tomoyo_truncate(argv0) + 14;
1963 realpath = strstr(header, " exec={ realpath=\"");
1966 len += tomoyo_truncate(realpath) + 6;
1968 symlink = strstr(header, " symlink.target=\"");
1970 len += tomoyo_truncate(symlink + 1) + 1;
1972 buffer = kmalloc(len, GFP_NOFS);
1975 snprintf(buffer, len - 1, "%s", cp);
1977 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
1979 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
1981 tomoyo_addprintf(buffer, len, "%s", symlink);
1982 tomoyo_normalize_line(buffer);
1983 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
1985 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
1990 * tomoyo_supervisor - Ask for the supervisor's decision.
1992 * @r: Pointer to "struct tomoyo_request_info".
1993 * @fmt: The printf()'s format string, followed by parameters.
1995 * Returns 0 if the supervisor decided to permit the access request which
1996 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1997 * supervisor decided to retry the access request which violated the policy in
1998 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
2000 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
2005 static unsigned int tomoyo_serial;
2006 struct tomoyo_query entry = { };
2007 bool quota_exceeded = false;
2008 va_start(args, fmt);
2009 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
2011 /* Write /sys/kernel/security/tomoyo/audit. */
2012 va_start(args, fmt);
2013 tomoyo_write_log2(r, len, fmt, args);
2015 /* Nothing more to do if granted. */
2019 tomoyo_update_stat(r->mode);
2021 case TOMOYO_CONFIG_ENFORCING:
2023 if (atomic_read(&tomoyo_query_observers))
2026 case TOMOYO_CONFIG_LEARNING:
2028 /* Check max_learning_entry parameter. */
2029 if (tomoyo_domain_quota_is_ok(r))
2036 va_start(args, fmt);
2037 entry.query = tomoyo_init_log(r, len, fmt, args);
2041 entry.query_len = strlen(entry.query) + 1;
2043 tomoyo_add_entry(r->domain, entry.query);
2046 len = tomoyo_round2(entry.query_len);
2047 spin_lock(&tomoyo_query_list_lock);
2048 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
2049 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
2050 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
2051 quota_exceeded = true;
2053 entry.serial = tomoyo_serial++;
2054 entry.retry = r->retry;
2055 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
2056 list_add_tail(&entry.list, &tomoyo_query_list);
2058 spin_unlock(&tomoyo_query_list_lock);
2061 /* Give 10 seconds for supervisor's opinion. */
2062 while (entry.timer < 10) {
2063 wake_up_all(&tomoyo_query_wait);
2064 if (wait_event_interruptible_timeout
2065 (tomoyo_answer_wait, entry.answer ||
2066 !atomic_read(&tomoyo_query_observers), HZ))
2071 spin_lock(&tomoyo_query_list_lock);
2072 list_del(&entry.list);
2073 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
2074 spin_unlock(&tomoyo_query_list_lock);
2075 switch (entry.answer) {
2076 case 3: /* Asked to retry by administrator. */
2077 error = TOMOYO_RETRY_REQUEST;
2081 /* Granted by administrator. */
2085 /* Timed out or rejected by administrator. */
2094 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2096 * @file: Pointer to "struct file".
2097 * @wait: Pointer to "poll_table".
2099 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
2101 * Waits for access requests which violated policy in enforcing mode.
2103 static int tomoyo_poll_query(struct file *file, poll_table *wait)
2105 struct list_head *tmp;
2108 for (i = 0; i < 2; i++) {
2109 spin_lock(&tomoyo_query_list_lock);
2110 list_for_each(tmp, &tomoyo_query_list) {
2111 struct tomoyo_query *ptr =
2112 list_entry(tmp, typeof(*ptr), list);
2118 spin_unlock(&tomoyo_query_list_lock);
2120 return POLLIN | POLLRDNORM;
2123 poll_wait(file, &tomoyo_query_wait, wait);
2129 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2131 * @head: Pointer to "struct tomoyo_io_buffer".
2133 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
2135 struct list_head *tmp;
2136 unsigned int pos = 0;
2141 if (head->read_buf) {
2142 kfree(head->read_buf);
2143 head->read_buf = NULL;
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 if (pos++ != head->r.query_index)
2152 len = ptr->query_len;
2155 spin_unlock(&tomoyo_query_list_lock);
2157 head->r.query_index = 0;
2160 buf = kzalloc(len + 32, GFP_NOFS);
2164 spin_lock(&tomoyo_query_list_lock);
2165 list_for_each(tmp, &tomoyo_query_list) {
2166 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2169 if (pos++ != head->r.query_index)
2172 * Some query can be skipped because tomoyo_query_list
2173 * can change, but I don't care.
2175 if (len == ptr->query_len)
2176 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2177 ptr->retry, ptr->query);
2180 spin_unlock(&tomoyo_query_list_lock);
2182 head->read_buf = buf;
2183 head->r.w[head->r.w_pos++] = buf;
2184 head->r.query_index++;
2191 * tomoyo_write_answer - Write the supervisor's decision.
2193 * @head: Pointer to "struct tomoyo_io_buffer".
2195 * Returns 0 on success, -EINVAL otherwise.
2197 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2199 char *data = head->write_buf;
2200 struct list_head *tmp;
2201 unsigned int serial;
2202 unsigned int answer;
2203 spin_lock(&tomoyo_query_list_lock);
2204 list_for_each(tmp, &tomoyo_query_list) {
2205 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2208 spin_unlock(&tomoyo_query_list_lock);
2209 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2211 spin_lock(&tomoyo_query_list_lock);
2212 list_for_each(tmp, &tomoyo_query_list) {
2213 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2214 if (ptr->serial != serial)
2217 ptr->answer = answer;
2220 spin_unlock(&tomoyo_query_list_lock);
2225 * tomoyo_read_version: Get version.
2227 * @head: Pointer to "struct tomoyo_io_buffer".
2229 * Returns version information.
2231 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
2234 tomoyo_io_printf(head, "2.5.0");
2239 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2240 static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2241 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2242 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2243 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2244 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2247 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2248 static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2249 [TOMOYO_MEMORY_POLICY] = "policy:",
2250 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2251 [TOMOYO_MEMORY_QUERY] = "query message:",
2254 /* Timestamp counter for last updated. */
2255 static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2256 /* Counter for number of updates. */
2257 static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
2260 * tomoyo_update_stat - Update statistic counters.
2262 * @index: Index for policy type.
2266 void tomoyo_update_stat(const u8 index)
2269 do_gettimeofday(&tv);
2271 * I don't use atomic operations because race condition is not fatal.
2273 tomoyo_stat_updated[index]++;
2274 tomoyo_stat_modified[index] = tv.tv_sec;
2278 * tomoyo_read_stat - Read statistic data.
2280 * @head: Pointer to "struct tomoyo_io_buffer".
2284 static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2287 unsigned int total = 0;
2290 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2291 tomoyo_io_printf(head, "Policy %-30s %10u",
2292 tomoyo_policy_headers[i],
2293 tomoyo_stat_updated[i]);
2294 if (tomoyo_stat_modified[i]) {
2295 struct tomoyo_time stamp;
2296 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
2297 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
2299 stamp.year, stamp.month, stamp.day,
2300 stamp.hour, stamp.min, stamp.sec);
2302 tomoyo_set_lf(head);
2304 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2305 unsigned int used = tomoyo_memory_used[i];
2307 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2308 tomoyo_memory_headers[i], used);
2309 used = tomoyo_memory_quota[i];
2311 tomoyo_io_printf(head, " (Quota: %10u)", used);
2312 tomoyo_set_lf(head);
2314 tomoyo_io_printf(head, "Total memory used: %10u\n",
2320 * tomoyo_write_stat - Set memory quota.
2322 * @head: Pointer to "struct tomoyo_io_buffer".
2326 static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2328 char *data = head->write_buf;
2330 if (tomoyo_str_starts(&data, "Memory used by "))
2331 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2332 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2333 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2338 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2340 * @type: Type of interface.
2341 * @file: Pointer to "struct file".
2343 * Returns 0 on success, negative value otherwise.
2345 int tomoyo_open_control(const u8 type, struct file *file)
2347 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
2351 mutex_init(&head->io_sem);
2354 case TOMOYO_DOMAINPOLICY:
2355 /* /sys/kernel/security/tomoyo/domain_policy */
2356 head->write = tomoyo_write_domain;
2357 head->read = tomoyo_read_domain;
2359 case TOMOYO_EXCEPTIONPOLICY:
2360 /* /sys/kernel/security/tomoyo/exception_policy */
2361 head->write = tomoyo_write_exception;
2362 head->read = tomoyo_read_exception;
2365 /* /sys/kernel/security/tomoyo/audit */
2366 head->poll = tomoyo_poll_log;
2367 head->read = tomoyo_read_log;
2369 case TOMOYO_PROCESS_STATUS:
2370 /* /sys/kernel/security/tomoyo/.process_status */
2371 head->write = tomoyo_write_pid;
2372 head->read = tomoyo_read_pid;
2374 case TOMOYO_VERSION:
2375 /* /sys/kernel/security/tomoyo/version */
2376 head->read = tomoyo_read_version;
2377 head->readbuf_size = 128;
2380 /* /sys/kernel/security/tomoyo/stat */
2381 head->write = tomoyo_write_stat;
2382 head->read = tomoyo_read_stat;
2383 head->readbuf_size = 1024;
2385 case TOMOYO_PROFILE:
2386 /* /sys/kernel/security/tomoyo/profile */
2387 head->write = tomoyo_write_profile;
2388 head->read = tomoyo_read_profile;
2390 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2391 head->poll = tomoyo_poll_query;
2392 head->write = tomoyo_write_answer;
2393 head->read = tomoyo_read_query;
2395 case TOMOYO_MANAGER:
2396 /* /sys/kernel/security/tomoyo/manager */
2397 head->write = tomoyo_write_manager;
2398 head->read = tomoyo_read_manager;
2401 if (!(file->f_mode & FMODE_READ)) {
2403 * No need to allocate read_buf since it is not opened
2408 } else if (!head->poll) {
2409 /* Don't allocate read_buf for poll() access. */
2410 if (!head->readbuf_size)
2411 head->readbuf_size = 4096 * 2;
2412 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
2413 if (!head->read_buf) {
2418 if (!(file->f_mode & FMODE_WRITE)) {
2420 * No need to allocate write_buf since it is not opened
2424 } else if (head->write) {
2425 head->writebuf_size = 4096 * 2;
2426 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
2427 if (!head->write_buf) {
2428 kfree(head->read_buf);
2434 * If the file is /sys/kernel/security/tomoyo/query , increment the
2436 * The obserber counter is used by tomoyo_supervisor() to see if
2437 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2439 if (type == TOMOYO_QUERY)
2440 atomic_inc(&tomoyo_query_observers);
2441 file->private_data = head;
2442 tomoyo_notify_gc(head, true);
2447 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2449 * @file: Pointer to "struct file".
2450 * @wait: Pointer to "poll_table".
2452 * Waits for read readiness.
2453 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
2454 * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
2456 int tomoyo_poll_control(struct file *file, poll_table *wait)
2458 struct tomoyo_io_buffer *head = file->private_data;
2461 return head->poll(file, wait);
2465 * tomoyo_set_namespace_cursor - Set namespace to read.
2467 * @head: Pointer to "struct tomoyo_io_buffer".
2471 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2473 struct list_head *ns;
2474 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2475 head->type != TOMOYO_PROFILE)
2478 * If this is the first read, or reading previous namespace finished
2479 * and has more namespaces to read, update the namespace cursor.
2482 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2483 /* Clearing is OK because tomoyo_flush() returned true. */
2484 memset(&head->r, 0, sizeof(head->r));
2485 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2490 * tomoyo_has_more_namespace - Check for unread namespaces.
2492 * @head: Pointer to "struct tomoyo_io_buffer".
2494 * Returns true if we have more entries to print, false otherwise.
2496 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2498 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2499 head->type == TOMOYO_PROFILE) && head->r.eof &&
2500 head->r.ns->next != &tomoyo_namespace_list;
2504 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2506 * @head: Pointer to "struct tomoyo_io_buffer".
2507 * @buffer: Poiner to buffer to write to.
2508 * @buffer_len: Size of @buffer.
2510 * Returns bytes read on success, negative value otherwise.
2512 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2513 const int buffer_len)
2520 if (mutex_lock_interruptible(&head->io_sem))
2522 head->read_user_buf = buffer;
2523 head->read_user_buf_avail = buffer_len;
2524 idx = tomoyo_read_lock();
2525 if (tomoyo_flush(head))
2526 /* Call the policy handler. */
2528 tomoyo_set_namespace_cursor(head);
2530 } while (tomoyo_flush(head) &&
2531 tomoyo_has_more_namespace(head));
2532 tomoyo_read_unlock(idx);
2533 len = head->read_user_buf - buffer;
2534 mutex_unlock(&head->io_sem);
2539 * tomoyo_parse_policy - Parse a policy line.
2541 * @head: Poiter to "struct tomoyo_io_buffer".
2542 * @line: Line to parse.
2544 * Returns 0 on success, negative value otherwise.
2546 * Caller holds tomoyo_read_lock().
2548 static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2550 /* Delete request? */
2551 head->w.is_delete = !strncmp(line, "delete ", 7);
2552 if (head->w.is_delete)
2553 memmove(line, line + 7, strlen(line + 7) + 1);
2554 /* Selecting namespace to update. */
2555 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2556 head->type == TOMOYO_PROFILE) {
2558 char *cp = strchr(line, ' ');
2561 head->w.ns = tomoyo_assign_namespace(line);
2562 memmove(line, cp, strlen(cp) + 1);
2566 head->w.ns = &tomoyo_kernel_namespace;
2567 /* Don't allow updating if namespace is invalid. */
2571 /* Do the update. */
2572 return head->write(head);
2576 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2578 * @head: Pointer to "struct tomoyo_io_buffer".
2579 * @buffer: Pointer to buffer to read from.
2580 * @buffer_len: Size of @buffer.
2582 * Returns @buffer_len on success, negative value otherwise.
2584 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2585 const char __user *buffer, const int buffer_len)
2587 int error = buffer_len;
2588 size_t avail_len = buffer_len;
2589 char *cp0 = head->write_buf;
2593 if (!access_ok(VERIFY_READ, buffer, buffer_len))
2595 if (mutex_lock_interruptible(&head->io_sem))
2597 head->read_user_buf_avail = 0;
2598 idx = tomoyo_read_lock();
2599 /* Read a line and dispatch it to the policy handler. */
2600 while (avail_len > 0) {
2602 if (head->w.avail >= head->writebuf_size - 1) {
2603 const int len = head->writebuf_size * 2;
2604 char *cp = kzalloc(len, GFP_NOFS);
2609 memmove(cp, cp0, head->w.avail);
2611 head->write_buf = cp;
2613 head->writebuf_size = len;
2615 if (get_user(c, buffer)) {
2621 cp0[head->w.avail++] = c;
2624 cp0[head->w.avail - 1] = '\0';
2626 tomoyo_normalize_line(cp0);
2627 if (!strcmp(cp0, "reset")) {
2628 head->w.ns = &tomoyo_kernel_namespace;
2629 head->w.domain = NULL;
2630 memset(&head->r, 0, sizeof(head->r));
2633 /* Don't allow updating policies by non manager programs. */
2634 switch (head->type) {
2635 case TOMOYO_PROCESS_STATUS:
2636 /* This does not write anything. */
2638 case TOMOYO_DOMAINPOLICY:
2639 if (tomoyo_select_domain(head, cp0))
2642 case TOMOYO_EXCEPTIONPOLICY:
2643 if (!strcmp(cp0, "select transition_only")) {
2644 head->r.print_transition_related_only = true;
2649 if (!tomoyo_manager()) {
2654 switch (tomoyo_parse_policy(head, cp0)) {
2659 switch (head->type) {
2660 case TOMOYO_DOMAINPOLICY:
2661 case TOMOYO_EXCEPTIONPOLICY:
2663 case TOMOYO_PROFILE:
2664 case TOMOYO_MANAGER:
2665 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2674 tomoyo_read_unlock(idx);
2675 mutex_unlock(&head->io_sem);
2680 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2682 * @head: Pointer to "struct tomoyo_io_buffer".
2686 int tomoyo_close_control(struct tomoyo_io_buffer *head)
2689 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2692 if (head->type == TOMOYO_QUERY &&
2693 atomic_dec_and_test(&tomoyo_query_observers))
2694 wake_up_all(&tomoyo_answer_wait);
2695 tomoyo_notify_gc(head, false);
2700 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2702 void tomoyo_check_profile(void)
2704 struct tomoyo_domain_info *domain;
2705 const int idx = tomoyo_read_lock();
2706 tomoyo_policy_loaded = true;
2707 printk(KERN_INFO "TOMOYO: 2.5.0\n");
2708 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
2709 const u8 profile = domain->profile;
2710 const struct tomoyo_policy_namespace *ns = domain->ns;
2711 if (ns->profile_version != 20110903)
2713 "Profile version %u is not supported.\n",
2714 ns->profile_version);
2715 else if (!ns->profile_ptr[profile])
2717 "Profile %u (used by '%s') is not defined.\n",
2718 profile, domain->domainname->name);
2722 "Userland tools for TOMOYO 2.5 must be installed and "
2723 "policy must be initialized.\n");
2724 printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.5/ "
2725 "for more information.\n");
2728 tomoyo_read_unlock(idx);
2729 printk(KERN_INFO "Mandatory Access Control activated.\n");
2733 * tomoyo_load_builtin_policy - Load built-in policy.
2737 void __init tomoyo_load_builtin_policy(void)
2740 * This include file is manually created and contains built-in policy
2741 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2742 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2743 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2745 #include "builtin-policy.h"
2747 const int idx = tomoyo_read_lock();
2748 for (i = 0; i < 5; i++) {
2749 struct tomoyo_io_buffer head = { };
2753 start = tomoyo_builtin_profile;
2754 head.type = TOMOYO_PROFILE;
2755 head.write = tomoyo_write_profile;
2758 start = tomoyo_builtin_exception_policy;
2759 head.type = TOMOYO_EXCEPTIONPOLICY;
2760 head.write = tomoyo_write_exception;
2763 start = tomoyo_builtin_domain_policy;
2764 head.type = TOMOYO_DOMAINPOLICY;
2765 head.write = tomoyo_write_domain;
2768 start = tomoyo_builtin_manager;
2769 head.type = TOMOYO_MANAGER;
2770 head.write = tomoyo_write_manager;
2773 start = tomoyo_builtin_stat;
2774 head.type = TOMOYO_STAT;
2775 head.write = tomoyo_write_stat;
2779 char *end = strchr(start, '\n');
2783 tomoyo_normalize_line(start);
2784 head.write_buf = start;
2785 tomoyo_parse_policy(&head, start);
2789 tomoyo_read_unlock(idx);
2790 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2791 tomoyo_check_profile();