2 * security/tomoyo/common.c
4 * Common functions for TOMOYO.
6 * Copyright (C) 2005-2010 NTT DATA CORPORATION
9 #include <linux/uaccess.h>
10 #include <linux/slab.h>
11 #include <linux/security.h>
14 static struct tomoyo_profile tomoyo_default_profile = {
15 .learning = &tomoyo_default_profile.preference,
16 .permissive = &tomoyo_default_profile.preference,
17 .enforcing = &tomoyo_default_profile.preference,
18 .preference.enforcing_verbose = true,
19 .preference.learning_max_entry = 2048,
20 .preference.learning_verbose = false,
21 .preference.permissive_verbose = true
24 /* Profile version. Currently only 20090903 is defined. */
25 static unsigned int tomoyo_profile_version;
27 /* Profile table. Memory is allocated as needed. */
28 static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
30 /* String table for functionality that takes 4 modes. */
31 static const char *tomoyo_mode_4[4] = {
32 "disabled", "learning", "permissive", "enforcing"
35 /* String table for /sys/kernel/security/tomoyo/profile */
36 static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
37 + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
38 [TOMOYO_MAC_FILE_EXECUTE] = "file::execute",
39 [TOMOYO_MAC_FILE_OPEN] = "file::open",
40 [TOMOYO_MAC_FILE_CREATE] = "file::create",
41 [TOMOYO_MAC_FILE_UNLINK] = "file::unlink",
42 [TOMOYO_MAC_FILE_MKDIR] = "file::mkdir",
43 [TOMOYO_MAC_FILE_RMDIR] = "file::rmdir",
44 [TOMOYO_MAC_FILE_MKFIFO] = "file::mkfifo",
45 [TOMOYO_MAC_FILE_MKSOCK] = "file::mksock",
46 [TOMOYO_MAC_FILE_TRUNCATE] = "file::truncate",
47 [TOMOYO_MAC_FILE_SYMLINK] = "file::symlink",
48 [TOMOYO_MAC_FILE_REWRITE] = "file::rewrite",
49 [TOMOYO_MAC_FILE_MKBLOCK] = "file::mkblock",
50 [TOMOYO_MAC_FILE_MKCHAR] = "file::mkchar",
51 [TOMOYO_MAC_FILE_LINK] = "file::link",
52 [TOMOYO_MAC_FILE_RENAME] = "file::rename",
53 [TOMOYO_MAC_FILE_CHMOD] = "file::chmod",
54 [TOMOYO_MAC_FILE_CHOWN] = "file::chown",
55 [TOMOYO_MAC_FILE_CHGRP] = "file::chgrp",
56 [TOMOYO_MAC_FILE_IOCTL] = "file::ioctl",
57 [TOMOYO_MAC_FILE_CHROOT] = "file::chroot",
58 [TOMOYO_MAC_FILE_MOUNT] = "file::mount",
59 [TOMOYO_MAC_FILE_UMOUNT] = "file::umount",
60 [TOMOYO_MAC_FILE_PIVOT_ROOT] = "file::pivot_root",
61 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
64 /* Permit policy management by non-root user? */
65 static bool tomoyo_manage_by_non_root;
67 /* Utility functions. */
70 * tomoyo_yesno - Return "yes" or "no".
74 static const char *tomoyo_yesno(const unsigned int value)
76 return value ? "yes" : "no";
80 * tomoyo_print_name_union - Print a tomoyo_name_union.
82 * @head: Pointer to "struct tomoyo_io_buffer".
83 * @ptr: Pointer to "struct tomoyo_name_union".
85 * Returns true on success, false otherwise.
87 static bool tomoyo_print_name_union(struct tomoyo_io_buffer *head,
88 const struct tomoyo_name_union *ptr)
90 int pos = head->read_avail;
91 if (pos && head->read_buf[pos - 1] == ' ')
94 return tomoyo_io_printf(head, " @%s",
95 ptr->group->group_name->name);
96 return tomoyo_io_printf(head, " %s", ptr->filename->name);
100 * tomoyo_print_number_union - Print a tomoyo_number_union.
102 * @head: Pointer to "struct tomoyo_io_buffer".
103 * @ptr: Pointer to "struct tomoyo_number_union".
105 * Returns true on success, false otherwise.
107 bool tomoyo_print_number_union(struct tomoyo_io_buffer *head,
108 const struct tomoyo_number_union *ptr)
114 if (!tomoyo_io_printf(head, " "))
117 return tomoyo_io_printf(head, "@%s",
118 ptr->group->group_name->name);
119 min_type = ptr->min_type;
120 max_type = ptr->max_type;
121 min = ptr->values[0];
122 max = ptr->values[1];
124 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
125 if (!tomoyo_io_printf(head, "0x%lX", min))
128 case TOMOYO_VALUE_TYPE_OCTAL:
129 if (!tomoyo_io_printf(head, "0%lo", min))
133 if (!tomoyo_io_printf(head, "%lu", min))
137 if (min == max && min_type == max_type)
140 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
141 return tomoyo_io_printf(head, "-0x%lX", max);
142 case TOMOYO_VALUE_TYPE_OCTAL:
143 return tomoyo_io_printf(head, "-0%lo", max);
145 return tomoyo_io_printf(head, "-%lu", max);
150 * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure.
152 * @head: Pointer to "struct tomoyo_io_buffer".
153 * @fmt: The printf()'s format string, followed by parameters.
155 * Returns true if output was written, false otherwise.
157 * The snprintf() will truncate, but tomoyo_io_printf() won't.
159 bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
163 int pos = head->read_avail;
164 int size = head->readbuf_size - pos;
169 len = vsnprintf(head->read_buf + pos, size, fmt, args);
171 if (pos + len >= head->readbuf_size)
173 head->read_avail += len;
178 * tomoyo_find_or_assign_new_profile - Create a new profile.
180 * @profile: Profile number to create.
182 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
184 static struct tomoyo_profile *tomoyo_find_or_assign_new_profile
185 (const unsigned int profile)
187 struct tomoyo_profile *ptr;
188 struct tomoyo_profile *entry;
189 if (profile >= TOMOYO_MAX_PROFILES)
191 ptr = tomoyo_profile_ptr[profile];
194 entry = kzalloc(sizeof(*entry), GFP_NOFS);
195 if (mutex_lock_interruptible(&tomoyo_policy_lock))
197 ptr = tomoyo_profile_ptr[profile];
198 if (!ptr && tomoyo_memory_ok(entry)) {
200 ptr->learning = &tomoyo_default_profile.preference;
201 ptr->permissive = &tomoyo_default_profile.preference;
202 ptr->enforcing = &tomoyo_default_profile.preference;
203 ptr->default_config = TOMOYO_CONFIG_DISABLED;
204 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
205 sizeof(ptr->config));
206 mb(); /* Avoid out-of-order execution. */
207 tomoyo_profile_ptr[profile] = ptr;
210 mutex_unlock(&tomoyo_policy_lock);
217 * tomoyo_profile - Find a profile.
219 * @profile: Profile number to find.
221 * Returns pointer to "struct tomoyo_profile".
223 struct tomoyo_profile *tomoyo_profile(const u8 profile)
225 struct tomoyo_profile *ptr = tomoyo_profile_ptr[profile];
226 if (!tomoyo_policy_loaded)
227 return &tomoyo_default_profile;
233 * tomoyo_write_profile - Write profile table.
235 * @head: Pointer to "struct tomoyo_io_buffer".
237 * Returns 0 on success, negative value otherwise.
239 static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
241 char *data = head->write_buf;
246 bool use_default = false;
248 struct tomoyo_profile *profile;
249 if (sscanf(data, "PROFILE_VERSION=%u", &tomoyo_profile_version) == 1)
251 i = simple_strtoul(data, &cp, 10);
253 profile = &tomoyo_default_profile;
258 profile = tomoyo_find_or_assign_new_profile(i);
262 cp = strchr(data, '=');
266 if (profile != &tomoyo_default_profile)
267 use_default = strstr(cp, "use_default") != NULL;
268 if (strstr(cp, "verbose=yes"))
270 else if (strstr(cp, "verbose=no"))
274 if (!strcmp(data, "PREFERENCE::enforcing")) {
276 profile->enforcing = &tomoyo_default_profile.preference;
279 profile->enforcing = &profile->preference;
281 profile->preference.enforcing_verbose = value;
284 if (!strcmp(data, "PREFERENCE::permissive")) {
286 profile->permissive = &tomoyo_default_profile.preference;
289 profile->permissive = &profile->preference;
291 profile->preference.permissive_verbose = value;
294 if (!strcmp(data, "PREFERENCE::learning")) {
297 profile->learning = &tomoyo_default_profile.preference;
300 profile->learning = &profile->preference;
302 profile->preference.learning_verbose = value;
303 cp2 = strstr(cp, "max_entry=");
305 sscanf(cp2 + 10, "%u",
306 &profile->preference.learning_max_entry);
309 if (profile == &tomoyo_default_profile)
311 if (!strcmp(data, "COMMENT")) {
312 const struct tomoyo_path_info *old_comment = profile->comment;
313 profile->comment = tomoyo_get_name(cp);
314 tomoyo_put_name(old_comment);
317 if (!strcmp(data, "CONFIG")) {
318 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
319 config = profile->default_config;
320 } else if (tomoyo_str_starts(&data, "CONFIG::")) {
322 for (i = 0; i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
323 if (strcmp(data, tomoyo_mac_keywords[i]))
325 config = profile->config[i];
328 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
334 config = TOMOYO_CONFIG_USE_DEFAULT;
336 for (mode = 3; mode >= 0; mode--)
337 if (strstr(cp, tomoyo_mode_4[mode]))
339 * Update lower 3 bits in order to distinguish
340 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
342 config = (config & ~7) | mode;
344 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
345 profile->config[i] = config;
346 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
347 profile->default_config = config;
352 * tomoyo_read_profile - Read profile table.
354 * @head: Pointer to "struct tomoyo_io_buffer".
356 static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
363 tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903");
364 tomoyo_io_printf(head, "PREFERENCE::learning={ verbose=%s "
366 tomoyo_yesno(tomoyo_default_profile.preference.
368 tomoyo_default_profile.preference.learning_max_entry);
369 tomoyo_io_printf(head, "PREFERENCE::permissive={ verbose=%s }\n",
370 tomoyo_yesno(tomoyo_default_profile.preference.
371 permissive_verbose));
372 tomoyo_io_printf(head, "PREFERENCE::enforcing={ verbose=%s }\n",
373 tomoyo_yesno(tomoyo_default_profile.preference.
377 for (index = head->read_step; index < TOMOYO_MAX_PROFILES; index++) {
382 const struct tomoyo_profile *profile
383 = tomoyo_profile_ptr[index];
384 const struct tomoyo_path_info *comment;
385 head->read_step = index;
388 pos = head->read_avail;
389 comment = profile->comment;
390 done = tomoyo_io_printf(head, "%u-COMMENT=%s\n", index,
391 comment ? comment->name : "");
394 config = profile->default_config;
395 if (!tomoyo_io_printf(head, "%u-CONFIG={ mode=%s }\n", index,
396 tomoyo_mode_4[config & 3]))
398 for (i = 0; i < TOMOYO_MAX_MAC_INDEX +
399 TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
400 config = profile->config[i];
401 if (config == TOMOYO_CONFIG_USE_DEFAULT)
403 if (!tomoyo_io_printf(head,
404 "%u-CONFIG::%s={ mode=%s }\n",
405 index, tomoyo_mac_keywords[i],
406 tomoyo_mode_4[config & 3]))
409 if (profile->learning != &tomoyo_default_profile.preference &&
410 !tomoyo_io_printf(head, "%u-PREFERENCE::learning={ "
411 "verbose=%s max_entry=%u }\n", index,
412 tomoyo_yesno(profile->preference.
414 profile->preference.learning_max_entry))
416 if (profile->permissive != &tomoyo_default_profile.preference
417 && !tomoyo_io_printf(head, "%u-PREFERENCE::permissive={ "
418 "verbose=%s }\n", index,
419 tomoyo_yesno(profile->preference.
420 permissive_verbose)))
422 if (profile->enforcing != &tomoyo_default_profile.preference &&
423 !tomoyo_io_printf(head, "%u-PREFERENCE::enforcing={ "
424 "verbose=%s }\n", index,
425 tomoyo_yesno(profile->preference.
430 head->read_avail = pos;
433 if (index == TOMOYO_MAX_PROFILES)
434 head->read_eof = true;
437 static bool tomoyo_same_manager_entry(const struct tomoyo_acl_head *a,
438 const struct tomoyo_acl_head *b)
440 return container_of(a, struct tomoyo_policy_manager_entry, head)
442 container_of(b, struct tomoyo_policy_manager_entry, head)
447 * tomoyo_update_manager_entry - Add a manager entry.
449 * @manager: The path to manager or the domainnamme.
450 * @is_delete: True if it is a delete request.
452 * Returns 0 on success, negative value otherwise.
454 * Caller holds tomoyo_read_lock().
456 static int tomoyo_update_manager_entry(const char *manager,
457 const bool is_delete)
459 struct tomoyo_policy_manager_entry e = { };
462 if (tomoyo_domain_def(manager)) {
463 if (!tomoyo_correct_domain(manager))
467 if (!tomoyo_correct_path(manager))
470 e.manager = tomoyo_get_name(manager);
473 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
474 &tomoyo_policy_list[TOMOYO_ID_MANAGER],
475 tomoyo_same_manager_entry);
476 tomoyo_put_name(e.manager);
481 * tomoyo_write_manager_policy - Write manager policy.
483 * @head: Pointer to "struct tomoyo_io_buffer".
485 * Returns 0 on success, negative value otherwise.
487 * Caller holds tomoyo_read_lock().
489 static int tomoyo_write_manager_policy(struct tomoyo_io_buffer *head)
491 char *data = head->write_buf;
492 bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE);
494 if (!strcmp(data, "manage_by_non_root")) {
495 tomoyo_manage_by_non_root = !is_delete;
498 return tomoyo_update_manager_entry(data, is_delete);
502 * tomoyo_read_manager_policy - Read manager policy.
504 * @head: Pointer to "struct tomoyo_io_buffer".
506 * Caller holds tomoyo_read_lock().
508 static void tomoyo_read_manager_policy(struct tomoyo_io_buffer *head)
514 list_for_each_cookie(head->read_var2,
515 &tomoyo_policy_list[TOMOYO_ID_MANAGER]) {
516 struct tomoyo_policy_manager_entry *ptr =
517 list_entry(head->read_var2, typeof(*ptr), head.list);
518 if (ptr->head.is_deleted)
520 done = tomoyo_io_printf(head, "%s\n", ptr->manager->name);
524 head->read_eof = done;
528 * tomoyo_policy_manager - Check whether the current process is a policy manager.
530 * Returns true if the current process is permitted to modify policy
531 * via /sys/kernel/security/tomoyo/ interface.
533 * Caller holds tomoyo_read_lock().
535 static bool tomoyo_policy_manager(void)
537 struct tomoyo_policy_manager_entry *ptr;
539 const struct task_struct *task = current;
540 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
543 if (!tomoyo_policy_loaded)
545 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
547 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER],
549 if (!ptr->head.is_deleted && ptr->is_domain
550 && !tomoyo_pathcmp(domainname, ptr->manager)) {
557 exe = tomoyo_get_exe();
560 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER],
562 if (!ptr->head.is_deleted && !ptr->is_domain
563 && !strcmp(exe, ptr->manager->name)) {
568 if (!found) { /* Reduce error messages. */
569 static pid_t last_pid;
570 const pid_t pid = current->pid;
571 if (last_pid != pid) {
572 printk(KERN_WARNING "%s ( %s ) is not permitted to "
573 "update policies.\n", domainname->name, exe);
582 * tomoyo_select_one - Parse select command.
584 * @head: Pointer to "struct tomoyo_io_buffer".
585 * @data: String to parse.
587 * Returns true on success, false otherwise.
589 * Caller holds tomoyo_read_lock().
591 static bool tomoyo_select_one(struct tomoyo_io_buffer *head, const char *data)
594 struct tomoyo_domain_info *domain = NULL;
595 bool global_pid = false;
597 if (!strcmp(data, "allow_execute")) {
598 head->print_execute_only = true;
601 if (sscanf(data, "pid=%u", &pid) == 1 ||
602 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
603 struct task_struct *p;
605 read_lock(&tasklist_lock);
607 p = find_task_by_pid_ns(pid, &init_pid_ns);
609 p = find_task_by_vpid(pid);
611 domain = tomoyo_real_domain(p);
612 read_unlock(&tasklist_lock);
614 } else if (!strncmp(data, "domain=", 7)) {
615 if (tomoyo_domain_def(data + 7))
616 domain = tomoyo_find_domain(data + 7);
619 head->write_var1 = domain;
620 /* Accessing read_buf is safe because head->io_sem is held. */
622 return true; /* Do nothing if open(O_WRONLY). */
623 head->read_avail = 0;
624 tomoyo_io_printf(head, "# select %s\n", data);
625 head->read_single_domain = true;
626 head->read_eof = !domain;
627 head->read_var1 = &domain->list;
628 head->read_var2 = NULL;
631 if (domain && domain->is_deleted)
632 tomoyo_io_printf(head, "# This is a deleted domain.\n");
637 * tomoyo_delete_domain - Delete a domain.
639 * @domainname: The name of domain.
643 * Caller holds tomoyo_read_lock().
645 static int tomoyo_delete_domain(char *domainname)
647 struct tomoyo_domain_info *domain;
648 struct tomoyo_path_info name;
650 name.name = domainname;
651 tomoyo_fill_path_info(&name);
652 if (mutex_lock_interruptible(&tomoyo_policy_lock))
654 /* Is there an active domain? */
655 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
656 /* Never delete tomoyo_kernel_domain */
657 if (domain == &tomoyo_kernel_domain)
659 if (domain->is_deleted ||
660 tomoyo_pathcmp(domain->domainname, &name))
662 domain->is_deleted = true;
665 mutex_unlock(&tomoyo_policy_lock);
670 * tomoyo_write_domain_policy2 - Write domain policy.
672 * @head: Pointer to "struct tomoyo_io_buffer".
674 * Returns 0 on success, negative value otherwise.
676 * Caller holds tomoyo_read_lock().
678 static int tomoyo_write_domain_policy2(char *data,
679 struct tomoyo_domain_info *domain,
680 const bool is_delete)
682 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_MOUNT))
683 return tomoyo_write_mount_policy(data, domain, is_delete);
684 return tomoyo_write_file_policy(data, domain, is_delete);
688 * tomoyo_write_domain_policy - Write domain policy.
690 * @head: Pointer to "struct tomoyo_io_buffer".
692 * Returns 0 on success, negative value otherwise.
694 * Caller holds tomoyo_read_lock().
696 static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
698 char *data = head->write_buf;
699 struct tomoyo_domain_info *domain = head->write_var1;
700 bool is_delete = false;
701 bool is_select = false;
702 unsigned int profile;
704 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE))
706 else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT))
708 if (is_select && tomoyo_select_one(head, data))
710 /* Don't allow updating policies by non manager programs. */
711 if (!tomoyo_policy_manager())
713 if (tomoyo_domain_def(data)) {
716 tomoyo_delete_domain(data);
718 domain = tomoyo_find_domain(data);
720 domain = tomoyo_find_or_assign_new_domain(data, 0);
721 head->write_var1 = domain;
727 if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1
728 && profile < TOMOYO_MAX_PROFILES) {
729 if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)
730 domain->profile = (u8) profile;
733 if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) {
734 domain->ignore_global_allow_read = !is_delete;
737 if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) {
738 domain->quota_warned = !is_delete;
741 if (!strcmp(data, TOMOYO_KEYWORD_TRANSITION_FAILED)) {
742 domain->transition_failed = !is_delete;
745 return tomoyo_write_domain_policy2(data, domain, is_delete);
749 * tomoyo_print_path_acl - Print a single path ACL entry.
751 * @head: Pointer to "struct tomoyo_io_buffer".
752 * @ptr: Pointer to "struct tomoyo_path_acl".
754 * Returns true on success, false otherwise.
756 static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head,
757 struct tomoyo_path_acl *ptr)
761 const u16 perm = ptr->perm;
763 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
764 if (!(perm & (1 << bit)))
766 if (head->print_execute_only && bit != TOMOYO_TYPE_EXECUTE)
768 /* Print "read/write" instead of "read" and "write". */
769 if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE)
770 && (perm & (1 << TOMOYO_TYPE_READ_WRITE)))
772 pos = head->read_avail;
773 if (!tomoyo_io_printf(head, "allow_%s ",
774 tomoyo_path_keyword[bit]) ||
775 !tomoyo_print_name_union(head, &ptr->name) ||
776 !tomoyo_io_printf(head, "\n"))
782 head->read_bit = bit;
783 head->read_avail = pos;
788 * tomoyo_print_path2_acl - Print a double path ACL entry.
790 * @head: Pointer to "struct tomoyo_io_buffer".
791 * @ptr: Pointer to "struct tomoyo_path2_acl".
793 * Returns true on success, false otherwise.
795 static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer *head,
796 struct tomoyo_path2_acl *ptr)
799 const u8 perm = ptr->perm;
802 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
803 if (!(perm & (1 << bit)))
805 pos = head->read_avail;
806 if (!tomoyo_io_printf(head, "allow_%s ",
807 tomoyo_path2_keyword[bit]) ||
808 !tomoyo_print_name_union(head, &ptr->name1) ||
809 !tomoyo_print_name_union(head, &ptr->name2) ||
810 !tomoyo_io_printf(head, "\n"))
816 head->read_bit = bit;
817 head->read_avail = pos;
822 * tomoyo_print_path_number_acl - Print a path_number ACL entry.
824 * @head: Pointer to "struct tomoyo_io_buffer".
825 * @ptr: Pointer to "struct tomoyo_path_number_acl".
827 * Returns true on success, false otherwise.
829 static bool tomoyo_print_path_number_acl(struct tomoyo_io_buffer *head,
830 struct tomoyo_path_number_acl *ptr)
834 const u8 perm = ptr->perm;
835 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION;
837 if (!(perm & (1 << bit)))
839 pos = head->read_avail;
840 if (!tomoyo_io_printf(head, "allow_%s",
841 tomoyo_path_number_keyword[bit]) ||
842 !tomoyo_print_name_union(head, &ptr->name) ||
843 !tomoyo_print_number_union(head, &ptr->number) ||
844 !tomoyo_io_printf(head, "\n"))
850 head->read_bit = bit;
851 head->read_avail = pos;
856 * tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
858 * @head: Pointer to "struct tomoyo_io_buffer".
859 * @ptr: Pointer to "struct tomoyo_mkdev_acl".
861 * Returns true on success, false otherwise.
863 static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer *head,
864 struct tomoyo_mkdev_acl *ptr)
868 const u16 perm = ptr->perm;
869 for (bit = head->read_bit; bit < TOMOYO_MAX_MKDEV_OPERATION;
871 if (!(perm & (1 << bit)))
873 pos = head->read_avail;
874 if (!tomoyo_io_printf(head, "allow_%s",
875 tomoyo_mkdev_keyword[bit]) ||
876 !tomoyo_print_name_union(head, &ptr->name) ||
877 !tomoyo_print_number_union(head, &ptr->mode) ||
878 !tomoyo_print_number_union(head, &ptr->major) ||
879 !tomoyo_print_number_union(head, &ptr->minor) ||
880 !tomoyo_io_printf(head, "\n"))
886 head->read_bit = bit;
887 head->read_avail = pos;
892 * tomoyo_print_mount_acl - Print a mount ACL entry.
894 * @head: Pointer to "struct tomoyo_io_buffer".
895 * @ptr: Pointer to "struct tomoyo_mount_acl".
897 * Returns true on success, false otherwise.
899 static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer *head,
900 struct tomoyo_mount_acl *ptr)
902 const int pos = head->read_avail;
903 if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_MOUNT) ||
904 !tomoyo_print_name_union(head, &ptr->dev_name) ||
905 !tomoyo_print_name_union(head, &ptr->dir_name) ||
906 !tomoyo_print_name_union(head, &ptr->fs_type) ||
907 !tomoyo_print_number_union(head, &ptr->flags) ||
908 !tomoyo_io_printf(head, "\n")) {
909 head->read_avail = pos;
916 * tomoyo_print_entry - Print an ACL entry.
918 * @head: Pointer to "struct tomoyo_io_buffer".
919 * @ptr: Pointer to an ACL entry.
921 * Returns true on success, false otherwise.
923 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
924 struct tomoyo_acl_info *ptr)
926 const u8 acl_type = ptr->type;
930 if (acl_type == TOMOYO_TYPE_PATH_ACL) {
931 struct tomoyo_path_acl *acl
932 = container_of(ptr, struct tomoyo_path_acl, head);
933 return tomoyo_print_path_acl(head, acl);
935 if (head->print_execute_only)
937 if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
938 struct tomoyo_path2_acl *acl
939 = container_of(ptr, struct tomoyo_path2_acl, head);
940 return tomoyo_print_path2_acl(head, acl);
942 if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
943 struct tomoyo_path_number_acl *acl
944 = container_of(ptr, struct tomoyo_path_number_acl,
946 return tomoyo_print_path_number_acl(head, acl);
948 if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
949 struct tomoyo_mkdev_acl *acl
950 = container_of(ptr, struct tomoyo_mkdev_acl,
952 return tomoyo_print_mkdev_acl(head, acl);
954 if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
955 struct tomoyo_mount_acl *acl
956 = container_of(ptr, struct tomoyo_mount_acl, head);
957 return tomoyo_print_mount_acl(head, acl);
959 BUG(); /* This must not happen. */
964 * tomoyo_read_domain_policy - Read domain policy.
966 * @head: Pointer to "struct tomoyo_io_buffer".
968 * Caller holds tomoyo_read_lock().
970 static void tomoyo_read_domain_policy(struct tomoyo_io_buffer *head)
976 if (head->read_step == 0)
978 list_for_each_cookie(head->read_var1, &tomoyo_domain_list) {
979 struct tomoyo_domain_info *domain =
980 list_entry(head->read_var1, typeof(*domain), list);
981 const char *quota_exceeded = "";
982 const char *transition_failed = "";
983 const char *ignore_global_allow_read = "";
984 if (head->read_step != 1)
986 if (domain->is_deleted && !head->read_single_domain)
988 /* Print domainname and flags. */
989 if (domain->quota_warned)
990 quota_exceeded = "quota_exceeded\n";
991 if (domain->transition_failed)
992 transition_failed = "transition_failed\n";
993 if (domain->ignore_global_allow_read)
994 ignore_global_allow_read
995 = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n";
996 done = tomoyo_io_printf(head, "%s\n" TOMOYO_KEYWORD_USE_PROFILE
998 domain->domainname->name,
999 domain->profile, quota_exceeded,
1001 ignore_global_allow_read);
1004 head->read_step = 2;
1006 if (head->read_step == 3)
1008 /* Print ACL entries in the domain. */
1009 list_for_each_cookie(head->read_var2,
1010 &domain->acl_info_list) {
1011 struct tomoyo_acl_info *ptr =
1012 list_entry(head->read_var2, typeof(*ptr), list);
1013 done = tomoyo_print_entry(head, ptr);
1019 head->read_var2 = NULL;
1020 head->read_step = 3;
1022 done = tomoyo_io_printf(head, "\n");
1025 head->read_step = 1;
1026 if (head->read_single_domain)
1029 head->read_eof = done;
1033 * tomoyo_write_domain_profile - Assign profile for specified domain.
1035 * @head: Pointer to "struct tomoyo_io_buffer".
1037 * Returns 0 on success, -EINVAL otherwise.
1039 * This is equivalent to doing
1041 * ( echo "select " $domainname; echo "use_profile " $profile ) |
1042 * /usr/sbin/tomoyo-loadpolicy -d
1044 * Caller holds tomoyo_read_lock().
1046 static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head)
1048 char *data = head->write_buf;
1049 char *cp = strchr(data, ' ');
1050 struct tomoyo_domain_info *domain;
1051 unsigned long profile;
1056 domain = tomoyo_find_domain(cp + 1);
1057 if (strict_strtoul(data, 10, &profile))
1059 if (domain && profile < TOMOYO_MAX_PROFILES
1060 && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded))
1061 domain->profile = (u8) profile;
1066 * tomoyo_read_domain_profile - Read only domainname and profile.
1068 * @head: Pointer to "struct tomoyo_io_buffer".
1070 * Returns list of profile number and domainname pairs.
1072 * This is equivalent to doing
1074 * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
1075 * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" )
1076 * domainname = $0; } else if ( $1 == "use_profile" ) {
1077 * print $2 " " domainname; domainname = ""; } } ; '
1079 * Caller holds tomoyo_read_lock().
1081 static void tomoyo_read_domain_profile(struct tomoyo_io_buffer *head)
1087 list_for_each_cookie(head->read_var1, &tomoyo_domain_list) {
1088 struct tomoyo_domain_info *domain =
1089 list_entry(head->read_var1, typeof(*domain), list);
1090 if (domain->is_deleted)
1092 done = tomoyo_io_printf(head, "%u %s\n", domain->profile,
1093 domain->domainname->name);
1097 head->read_eof = done;
1101 * tomoyo_write_pid: Specify PID to obtain domainname.
1103 * @head: Pointer to "struct tomoyo_io_buffer".
1107 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1110 /* No error check. */
1111 strict_strtoul(head->write_buf, 10, &pid);
1112 head->read_step = (int) pid;
1113 head->read_eof = false;
1118 * tomoyo_read_pid - Get domainname of the specified PID.
1120 * @head: Pointer to "struct tomoyo_io_buffer".
1122 * Returns the domainname which the specified PID is in on success,
1123 * empty string otherwise.
1124 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1125 * using read()/write() interface rather than sysctl() interface.
1127 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1129 if (head->read_avail == 0 && !head->read_eof) {
1130 const int pid = head->read_step;
1131 struct task_struct *p;
1132 struct tomoyo_domain_info *domain = NULL;
1134 read_lock(&tasklist_lock);
1135 p = find_task_by_vpid(pid);
1137 domain = tomoyo_real_domain(p);
1138 read_unlock(&tasklist_lock);
1141 tomoyo_io_printf(head, "%d %u %s", pid, domain->profile,
1142 domain->domainname->name);
1143 head->read_eof = true;
1147 static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
1148 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE]
1149 = TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN,
1150 [TOMOYO_TRANSITION_CONTROL_INITIALIZE]
1151 = TOMOYO_KEYWORD_INITIALIZE_DOMAIN,
1152 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = TOMOYO_KEYWORD_NO_KEEP_DOMAIN,
1153 [TOMOYO_TRANSITION_CONTROL_KEEP] = TOMOYO_KEYWORD_KEEP_DOMAIN
1157 * tomoyo_write_exception_policy - Write exception policy.
1159 * @head: Pointer to "struct tomoyo_io_buffer".
1161 * Returns 0 on success, negative value otherwise.
1163 * Caller holds tomoyo_read_lock().
1165 static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head)
1167 char *data = head->write_buf;
1168 bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE);
1171 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) {
1172 if (tomoyo_str_starts(&data, tomoyo_transition_type[i]))
1173 return tomoyo_write_transition_control(data, is_delete,
1176 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_AGGREGATOR))
1177 return tomoyo_write_aggregator_policy(data, is_delete);
1178 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ))
1179 return tomoyo_write_globally_readable_policy(data, is_delete);
1180 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN))
1181 return tomoyo_write_pattern_policy(data, is_delete);
1182 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE))
1183 return tomoyo_write_no_rewrite_policy(data, is_delete);
1184 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_PATH_GROUP))
1185 return tomoyo_write_group(data, is_delete, TOMOYO_PATH_GROUP);
1186 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NUMBER_GROUP))
1187 return tomoyo_write_group(data, is_delete, TOMOYO_NUMBER_GROUP);
1191 static void tomoyo_print_number(char *buffer, int buffer_len,
1192 const struct tomoyo_number_union *ptr)
1195 unsigned long min = ptr->values[0];
1196 const unsigned long max = ptr->values[1];
1197 u8 min_type = ptr->min_type;
1198 const u8 max_type = ptr->max_type;
1199 memset(buffer, 0, buffer_len);
1201 for (i = 0; i < 2; i++) {
1204 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
1205 snprintf(buffer, buffer_len, "0x%lX", min);
1207 case TOMOYO_VALUE_TYPE_OCTAL:
1208 snprintf(buffer, buffer_len, "0%lo", min);
1211 snprintf(buffer, buffer_len, "%lu", min);
1214 if (min == max && min_type == max_type)
1216 len = strlen(buffer);
1217 buffer[len++] = '-';
1220 min_type = max_type;
1225 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
1226 [TOMOYO_PATH_GROUP] = TOMOYO_KEYWORD_PATH_GROUP,
1227 [TOMOYO_NUMBER_GROUP] = TOMOYO_KEYWORD_NUMBER_GROUP
1231 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
1233 * @head: Pointer to "struct tomoyo_io_buffer".
1234 * @idx: Index number.
1236 * Returns true on success, false otherwise.
1238 * Caller holds tomoyo_read_lock().
1240 static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1242 const char *w[3] = { "", "", "" };
1243 w[0] = tomoyo_group_name[idx];
1244 list_for_each_cookie(head->read_var1, &tomoyo_group_list[idx]) {
1245 struct tomoyo_group *group =
1246 list_entry(head->read_var1, typeof(*group), list);
1247 w[1] = group->group_name->name;
1248 list_for_each_cookie(head->read_var2, &group->member_list) {
1250 struct tomoyo_acl_head *ptr =
1251 list_entry(head->read_var2, typeof(*ptr), list);
1252 if (ptr->is_deleted)
1254 if (idx == TOMOYO_PATH_GROUP) {
1255 w[2] = container_of(ptr,
1256 struct tomoyo_path_group,
1257 head)->member_name->name;
1258 } else if (idx == TOMOYO_NUMBER_GROUP) {
1259 tomoyo_print_number(buffer, sizeof(buffer),
1262 tomoyo_number_group,
1266 if (!tomoyo_io_printf(head, "%s%s %s\n", w[0], w[1],
1270 head->read_var2 = NULL;
1272 head->read_var1 = NULL;
1277 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1279 * @head: Pointer to "struct tomoyo_io_buffer".
1280 * @idx: Index number.
1282 * Returns true on success, false otherwise.
1284 * Caller holds tomoyo_read_lock().
1286 static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1288 list_for_each_cookie(head->read_var2, &tomoyo_policy_list[idx]) {
1289 const char *w[4] = { "", "", "", "" };
1290 struct tomoyo_acl_head *acl =
1291 container_of(head->read_var2, typeof(*acl), list);
1292 if (acl->is_deleted)
1295 case TOMOYO_ID_TRANSITION_CONTROL:
1297 struct tomoyo_transition_control *ptr =
1298 container_of(acl, typeof(*ptr), head);
1299 w[0] = tomoyo_transition_type[ptr->type];
1301 w[1] = ptr->program->name;
1302 if (ptr->domainname)
1303 w[3] = ptr->domainname->name;
1304 if (w[1][0] && w[3][0])
1308 case TOMOYO_ID_GLOBALLY_READABLE:
1310 struct tomoyo_globally_readable_file_entry *ptr
1311 = container_of(acl, typeof(*ptr), head);
1312 w[0] = TOMOYO_KEYWORD_ALLOW_READ;
1313 w[1] = ptr->filename->name;
1316 case TOMOYO_ID_AGGREGATOR:
1318 struct tomoyo_aggregator_entry *ptr =
1319 container_of(acl, typeof(*ptr), head);
1320 w[0] = TOMOYO_KEYWORD_AGGREGATOR;
1321 w[1] = ptr->original_name->name;
1323 w[3] = ptr->aggregated_name->name;
1326 case TOMOYO_ID_PATTERN:
1328 struct tomoyo_pattern_entry *ptr =
1329 container_of(acl, typeof(*ptr), head);
1330 w[0] = TOMOYO_KEYWORD_FILE_PATTERN;
1331 w[1] = ptr->pattern->name;
1334 case TOMOYO_ID_NO_REWRITE:
1336 struct tomoyo_no_rewrite_entry *ptr =
1337 container_of(acl, typeof(*ptr), head);
1338 w[0] = TOMOYO_KEYWORD_DENY_REWRITE;
1339 w[1] = ptr->pattern->name;
1345 if (!tomoyo_io_printf(head, "%s%s%s%s\n", w[0], w[1], w[2],
1349 head->read_var2 = NULL;
1354 * tomoyo_read_exception_policy - Read exception policy.
1356 * @head: Pointer to "struct tomoyo_io_buffer".
1358 * Caller holds tomoyo_read_lock().
1360 static void tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
1364 while (head->read_step < TOMOYO_MAX_POLICY &&
1365 tomoyo_read_policy(head, head->read_step))
1367 if (head->read_step < TOMOYO_MAX_POLICY)
1369 while (head->read_step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1370 tomoyo_read_group(head, head->read_step - TOMOYO_MAX_POLICY))
1372 if (head->read_step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
1374 head->read_eof = true;
1378 * tomoyo_print_header - Get header line of audit log.
1380 * @r: Pointer to "struct tomoyo_request_info".
1382 * Returns string representation.
1384 * This function uses kmalloc(), so caller must kfree() if this function
1385 * didn't return NULL.
1387 static char *tomoyo_print_header(struct tomoyo_request_info *r)
1389 static const char *tomoyo_mode_4[4] = {
1390 "disabled", "learning", "permissive", "enforcing"
1393 const pid_t gpid = task_pid_nr(current);
1394 static const int tomoyo_buffer_len = 4096;
1395 char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
1398 do_gettimeofday(&tv);
1399 snprintf(buffer, tomoyo_buffer_len - 1,
1400 "#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
1401 " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
1402 " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
1403 tv.tv_sec, r->profile, tomoyo_mode_4[r->mode], gpid,
1404 (pid_t) sys_getpid(), (pid_t) sys_getppid(),
1405 current_uid(), current_gid(), current_euid(),
1406 current_egid(), current_suid(), current_sgid(),
1407 current_fsuid(), current_fsgid());
1412 * tomoyo_init_audit_log - Allocate buffer for audit logs.
1414 * @len: Required size.
1415 * @r: Pointer to "struct tomoyo_request_info".
1417 * Returns pointer to allocated memory.
1419 * The @len is updated to add the header lines' size on success.
1421 * This function uses kzalloc(), so caller must kfree() if this function
1422 * didn't return NULL.
1424 static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r)
1428 const char *domainname;
1430 r->domain = tomoyo_domain();
1431 domainname = r->domain->domainname->name;
1432 header = tomoyo_print_header(r);
1435 *len += strlen(domainname) + strlen(header) + 10;
1436 buf = kzalloc(*len, GFP_NOFS);
1438 snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname);
1443 /* Wait queue for tomoyo_query_list. */
1444 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1446 /* Lock for manipulating tomoyo_query_list. */
1447 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1449 /* Structure for query. */
1450 struct tomoyo_query_entry {
1451 struct list_head list;
1454 unsigned int serial;
1459 /* The list for "struct tomoyo_query_entry". */
1460 static LIST_HEAD(tomoyo_query_list);
1463 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1466 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1469 * tomoyo_supervisor - Ask for the supervisor's decision.
1471 * @r: Pointer to "struct tomoyo_request_info".
1472 * @fmt: The printf()'s format string, followed by parameters.
1474 * Returns 0 if the supervisor decided to permit the access request which
1475 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1476 * supervisor decided to retry the access request which violated the policy in
1477 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1479 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1485 static unsigned int tomoyo_serial;
1486 struct tomoyo_query_entry *tomoyo_query_entry = NULL;
1487 bool quota_exceeded = false;
1491 case TOMOYO_CONFIG_LEARNING:
1492 if (!tomoyo_domain_quota_is_ok(r))
1494 va_start(args, fmt);
1495 len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4;
1497 buffer = kmalloc(len, GFP_NOFS);
1500 va_start(args, fmt);
1501 vsnprintf(buffer, len - 1, fmt, args);
1503 tomoyo_normalize_line(buffer);
1504 tomoyo_write_domain_policy2(buffer, r->domain, false);
1507 case TOMOYO_CONFIG_PERMISSIVE:
1511 r->domain = tomoyo_domain();
1512 if (!atomic_read(&tomoyo_query_observers))
1514 va_start(args, fmt);
1515 len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32;
1517 header = tomoyo_init_audit_log(&len, r);
1520 tomoyo_query_entry = kzalloc(sizeof(*tomoyo_query_entry), GFP_NOFS);
1521 if (!tomoyo_query_entry)
1523 tomoyo_query_entry->query = kzalloc(len, GFP_NOFS);
1524 if (!tomoyo_query_entry->query)
1526 len = ksize(tomoyo_query_entry->query);
1527 INIT_LIST_HEAD(&tomoyo_query_entry->list);
1528 spin_lock(&tomoyo_query_list_lock);
1529 if (tomoyo_quota_for_query && tomoyo_query_memory_size + len +
1530 sizeof(*tomoyo_query_entry) >= tomoyo_quota_for_query) {
1531 quota_exceeded = true;
1533 tomoyo_query_memory_size += len + sizeof(*tomoyo_query_entry);
1534 tomoyo_query_entry->serial = tomoyo_serial++;
1536 spin_unlock(&tomoyo_query_list_lock);
1539 pos = snprintf(tomoyo_query_entry->query, len - 1, "Q%u-%hu\n%s",
1540 tomoyo_query_entry->serial, r->retry, header);
1543 va_start(args, fmt);
1544 vsnprintf(tomoyo_query_entry->query + pos, len - 1 - pos, fmt, args);
1545 tomoyo_query_entry->query_len = strlen(tomoyo_query_entry->query) + 1;
1547 spin_lock(&tomoyo_query_list_lock);
1548 list_add_tail(&tomoyo_query_entry->list, &tomoyo_query_list);
1549 spin_unlock(&tomoyo_query_list_lock);
1550 /* Give 10 seconds for supervisor's opinion. */
1551 for (tomoyo_query_entry->timer = 0;
1552 atomic_read(&tomoyo_query_observers) && tomoyo_query_entry->timer < 100;
1553 tomoyo_query_entry->timer++) {
1554 wake_up(&tomoyo_query_wait);
1555 set_current_state(TASK_INTERRUPTIBLE);
1556 schedule_timeout(HZ / 10);
1557 if (tomoyo_query_entry->answer)
1560 spin_lock(&tomoyo_query_list_lock);
1561 list_del(&tomoyo_query_entry->list);
1562 tomoyo_query_memory_size -= len + sizeof(*tomoyo_query_entry);
1563 spin_unlock(&tomoyo_query_list_lock);
1564 switch (tomoyo_query_entry->answer) {
1565 case 3: /* Asked to retry by administrator. */
1566 error = TOMOYO_RETRY_REQUEST;
1570 /* Granted by administrator. */
1577 /* Rejected by administrator. */
1581 if (tomoyo_query_entry)
1582 kfree(tomoyo_query_entry->query);
1583 kfree(tomoyo_query_entry);
1589 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1591 * @file: Pointer to "struct file".
1592 * @wait: Pointer to "poll_table".
1594 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1596 * Waits for access requests which violated policy in enforcing mode.
1598 static int tomoyo_poll_query(struct file *file, poll_table *wait)
1600 struct list_head *tmp;
1603 for (i = 0; i < 2; i++) {
1604 spin_lock(&tomoyo_query_list_lock);
1605 list_for_each(tmp, &tomoyo_query_list) {
1606 struct tomoyo_query_entry *ptr
1607 = list_entry(tmp, struct tomoyo_query_entry,
1614 spin_unlock(&tomoyo_query_list_lock);
1616 return POLLIN | POLLRDNORM;
1619 poll_wait(file, &tomoyo_query_wait, wait);
1625 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1627 * @head: Pointer to "struct tomoyo_io_buffer".
1629 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
1631 struct list_head *tmp;
1635 if (head->read_avail)
1637 if (head->read_buf) {
1638 kfree(head->read_buf);
1639 head->read_buf = NULL;
1640 head->readbuf_size = 0;
1642 spin_lock(&tomoyo_query_list_lock);
1643 list_for_each(tmp, &tomoyo_query_list) {
1644 struct tomoyo_query_entry *ptr
1645 = list_entry(tmp, struct tomoyo_query_entry, list);
1648 if (pos++ != head->read_step)
1650 len = ptr->query_len;
1653 spin_unlock(&tomoyo_query_list_lock);
1655 head->read_step = 0;
1658 buf = kzalloc(len, GFP_NOFS);
1662 spin_lock(&tomoyo_query_list_lock);
1663 list_for_each(tmp, &tomoyo_query_list) {
1664 struct tomoyo_query_entry *ptr
1665 = list_entry(tmp, struct tomoyo_query_entry, list);
1668 if (pos++ != head->read_step)
1671 * Some query can be skipped because tomoyo_query_list
1672 * can change, but I don't care.
1674 if (len == ptr->query_len)
1675 memmove(buf, ptr->query, len);
1678 spin_unlock(&tomoyo_query_list_lock);
1680 head->read_avail = len;
1681 head->readbuf_size = head->read_avail;
1682 head->read_buf = buf;
1690 * tomoyo_write_answer - Write the supervisor's decision.
1692 * @head: Pointer to "struct tomoyo_io_buffer".
1694 * Returns 0 on success, -EINVAL otherwise.
1696 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
1698 char *data = head->write_buf;
1699 struct list_head *tmp;
1700 unsigned int serial;
1701 unsigned int answer;
1702 spin_lock(&tomoyo_query_list_lock);
1703 list_for_each(tmp, &tomoyo_query_list) {
1704 struct tomoyo_query_entry *ptr
1705 = list_entry(tmp, struct tomoyo_query_entry, list);
1708 spin_unlock(&tomoyo_query_list_lock);
1709 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
1711 spin_lock(&tomoyo_query_list_lock);
1712 list_for_each(tmp, &tomoyo_query_list) {
1713 struct tomoyo_query_entry *ptr
1714 = list_entry(tmp, struct tomoyo_query_entry, list);
1715 if (ptr->serial != serial)
1718 ptr->answer = answer;
1721 spin_unlock(&tomoyo_query_list_lock);
1726 * tomoyo_read_version: Get version.
1728 * @head: Pointer to "struct tomoyo_io_buffer".
1730 * Returns version information.
1732 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
1734 if (!head->read_eof) {
1735 tomoyo_io_printf(head, "2.3.0-pre");
1736 head->read_eof = true;
1741 * tomoyo_read_self_domain - Get the current process's domainname.
1743 * @head: Pointer to "struct tomoyo_io_buffer".
1745 * Returns the current process's domainname.
1747 static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
1749 if (!head->read_eof) {
1751 * tomoyo_domain()->domainname != NULL
1752 * because every process belongs to a domain and
1753 * the domain's name cannot be NULL.
1755 tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
1756 head->read_eof = true;
1761 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
1763 * @type: Type of interface.
1764 * @file: Pointer to "struct file".
1766 * Associates policy handler and returns 0 on success, -ENOMEM otherwise.
1768 * Caller acquires tomoyo_read_lock().
1770 int tomoyo_open_control(const u8 type, struct file *file)
1772 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
1776 mutex_init(&head->io_sem);
1779 case TOMOYO_DOMAINPOLICY:
1780 /* /sys/kernel/security/tomoyo/domain_policy */
1781 head->write = tomoyo_write_domain_policy;
1782 head->read = tomoyo_read_domain_policy;
1784 case TOMOYO_EXCEPTIONPOLICY:
1785 /* /sys/kernel/security/tomoyo/exception_policy */
1786 head->write = tomoyo_write_exception_policy;
1787 head->read = tomoyo_read_exception_policy;
1789 case TOMOYO_SELFDOMAIN:
1790 /* /sys/kernel/security/tomoyo/self_domain */
1791 head->read = tomoyo_read_self_domain;
1793 case TOMOYO_DOMAIN_STATUS:
1794 /* /sys/kernel/security/tomoyo/.domain_status */
1795 head->write = tomoyo_write_domain_profile;
1796 head->read = tomoyo_read_domain_profile;
1798 case TOMOYO_PROCESS_STATUS:
1799 /* /sys/kernel/security/tomoyo/.process_status */
1800 head->write = tomoyo_write_pid;
1801 head->read = tomoyo_read_pid;
1803 case TOMOYO_VERSION:
1804 /* /sys/kernel/security/tomoyo/version */
1805 head->read = tomoyo_read_version;
1806 head->readbuf_size = 128;
1808 case TOMOYO_MEMINFO:
1809 /* /sys/kernel/security/tomoyo/meminfo */
1810 head->write = tomoyo_write_memory_quota;
1811 head->read = tomoyo_read_memory_counter;
1812 head->readbuf_size = 512;
1814 case TOMOYO_PROFILE:
1815 /* /sys/kernel/security/tomoyo/profile */
1816 head->write = tomoyo_write_profile;
1817 head->read = tomoyo_read_profile;
1819 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
1820 head->poll = tomoyo_poll_query;
1821 head->write = tomoyo_write_answer;
1822 head->read = tomoyo_read_query;
1824 case TOMOYO_MANAGER:
1825 /* /sys/kernel/security/tomoyo/manager */
1826 head->write = tomoyo_write_manager_policy;
1827 head->read = tomoyo_read_manager_policy;
1830 if (!(file->f_mode & FMODE_READ)) {
1832 * No need to allocate read_buf since it is not opened
1837 } else if (!head->poll) {
1838 /* Don't allocate read_buf for poll() access. */
1839 if (!head->readbuf_size)
1840 head->readbuf_size = 4096 * 2;
1841 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
1842 if (!head->read_buf) {
1847 if (!(file->f_mode & FMODE_WRITE)) {
1849 * No need to allocate write_buf since it is not opened
1853 } else if (head->write) {
1854 head->writebuf_size = 4096 * 2;
1855 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
1856 if (!head->write_buf) {
1857 kfree(head->read_buf);
1862 if (type != TOMOYO_QUERY)
1863 head->reader_idx = tomoyo_read_lock();
1864 file->private_data = head;
1866 * Call the handler now if the file is
1867 * /sys/kernel/security/tomoyo/self_domain
1868 * so that the user can use
1869 * cat < /sys/kernel/security/tomoyo/self_domain"
1870 * to know the current process's domainname.
1872 if (type == TOMOYO_SELFDOMAIN)
1873 tomoyo_read_control(file, NULL, 0);
1875 * If the file is /sys/kernel/security/tomoyo/query , increment the
1877 * The obserber counter is used by tomoyo_supervisor() to see if
1878 * there is some process monitoring /sys/kernel/security/tomoyo/query.
1880 else if (type == TOMOYO_QUERY)
1881 atomic_inc(&tomoyo_query_observers);
1886 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
1888 * @file: Pointer to "struct file".
1889 * @wait: Pointer to "poll_table".
1891 * Waits for read readiness.
1892 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
1894 int tomoyo_poll_control(struct file *file, poll_table *wait)
1896 struct tomoyo_io_buffer *head = file->private_data;
1899 return head->poll(file, wait);
1903 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
1905 * @file: Pointer to "struct file".
1906 * @buffer: Poiner to buffer to write to.
1907 * @buffer_len: Size of @buffer.
1909 * Returns bytes read on success, negative value otherwise.
1911 * Caller holds tomoyo_read_lock().
1913 int tomoyo_read_control(struct file *file, char __user *buffer,
1914 const int buffer_len)
1917 struct tomoyo_io_buffer *head = file->private_data;
1922 if (mutex_lock_interruptible(&head->io_sem))
1924 /* Call the policy handler. */
1928 /* Write to buffer. */
1929 len = head->read_avail;
1930 if (len > buffer_len)
1934 /* head->read_buf changes by some functions. */
1935 cp = head->read_buf;
1936 if (copy_to_user(buffer, cp, len)) {
1940 head->read_avail -= len;
1941 memmove(cp, cp + len, head->read_avail);
1943 mutex_unlock(&head->io_sem);
1948 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
1950 * @file: Pointer to "struct file".
1951 * @buffer: Pointer to buffer to read from.
1952 * @buffer_len: Size of @buffer.
1954 * Returns @buffer_len on success, negative value otherwise.
1956 * Caller holds tomoyo_read_lock().
1958 int tomoyo_write_control(struct file *file, const char __user *buffer,
1959 const int buffer_len)
1961 struct tomoyo_io_buffer *head = file->private_data;
1962 int error = buffer_len;
1963 int avail_len = buffer_len;
1964 char *cp0 = head->write_buf;
1968 if (!access_ok(VERIFY_READ, buffer, buffer_len))
1970 /* Don't allow updating policies by non manager programs. */
1971 if (head->write != tomoyo_write_pid &&
1972 head->write != tomoyo_write_domain_policy &&
1973 !tomoyo_policy_manager())
1975 if (mutex_lock_interruptible(&head->io_sem))
1977 /* Read a line and dispatch it to the policy handler. */
1978 while (avail_len > 0) {
1980 if (head->write_avail >= head->writebuf_size - 1) {
1983 } else if (get_user(c, buffer)) {
1989 cp0[head->write_avail++] = c;
1992 cp0[head->write_avail - 1] = '\0';
1993 head->write_avail = 0;
1994 tomoyo_normalize_line(cp0);
1997 mutex_unlock(&head->io_sem);
2002 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2004 * @file: Pointer to "struct file".
2006 * Releases memory and returns 0.
2008 * Caller looses tomoyo_read_lock().
2010 int tomoyo_close_control(struct file *file)
2012 struct tomoyo_io_buffer *head = file->private_data;
2013 const bool is_write = !!head->write_buf;
2016 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2019 if (head->type == TOMOYO_QUERY)
2020 atomic_dec(&tomoyo_query_observers);
2022 tomoyo_read_unlock(head->reader_idx);
2023 /* Release memory used for policy I/O. */
2024 kfree(head->read_buf);
2025 head->read_buf = NULL;
2026 kfree(head->write_buf);
2027 head->write_buf = NULL;
2030 file->private_data = NULL;
2037 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2039 void tomoyo_check_profile(void)
2041 struct tomoyo_domain_info *domain;
2042 const int idx = tomoyo_read_lock();
2043 tomoyo_policy_loaded = true;
2044 /* Check all profiles currently assigned to domains are defined. */
2045 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
2046 const u8 profile = domain->profile;
2047 if (tomoyo_profile_ptr[profile])
2049 panic("Profile %u (used by '%s') not defined.\n",
2050 profile, domain->domainname->name);
2052 tomoyo_read_unlock(idx);
2053 if (tomoyo_profile_version != 20090903)
2054 panic("Profile version %u is not supported.\n",
2055 tomoyo_profile_version);
2056 printk(KERN_INFO "TOMOYO: 2.3.0-pre 2010/06/03\n");
2057 printk(KERN_INFO "Mandatory Access Control activated.\n");