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)
510 struct list_head *pos;
515 list_for_each_cookie(pos, head->read_var2,
516 &tomoyo_policy_list[TOMOYO_ID_MANAGER]) {
517 struct tomoyo_policy_manager_entry *ptr;
518 ptr = list_entry(pos, struct tomoyo_policy_manager_entry,
520 if (ptr->head.is_deleted)
522 done = tomoyo_io_printf(head, "%s\n", ptr->manager->name);
526 head->read_eof = done;
530 * tomoyo_policy_manager - Check whether the current process is a policy manager.
532 * Returns true if the current process is permitted to modify policy
533 * via /sys/kernel/security/tomoyo/ interface.
535 * Caller holds tomoyo_read_lock().
537 static bool tomoyo_policy_manager(void)
539 struct tomoyo_policy_manager_entry *ptr;
541 const struct task_struct *task = current;
542 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
545 if (!tomoyo_policy_loaded)
547 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
549 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER],
551 if (!ptr->head.is_deleted && ptr->is_domain
552 && !tomoyo_pathcmp(domainname, ptr->manager)) {
559 exe = tomoyo_get_exe();
562 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER],
564 if (!ptr->head.is_deleted && !ptr->is_domain
565 && !strcmp(exe, ptr->manager->name)) {
570 if (!found) { /* Reduce error messages. */
571 static pid_t last_pid;
572 const pid_t pid = current->pid;
573 if (last_pid != pid) {
574 printk(KERN_WARNING "%s ( %s ) is not permitted to "
575 "update policies.\n", domainname->name, exe);
584 * tomoyo_select_one - Parse select command.
586 * @head: Pointer to "struct tomoyo_io_buffer".
587 * @data: String to parse.
589 * Returns true on success, false otherwise.
591 * Caller holds tomoyo_read_lock().
593 static bool tomoyo_select_one(struct tomoyo_io_buffer *head,
597 struct tomoyo_domain_info *domain = NULL;
598 bool global_pid = false;
600 if (sscanf(data, "pid=%u", &pid) == 1 ||
601 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
602 struct task_struct *p;
604 read_lock(&tasklist_lock);
606 p = find_task_by_pid_ns(pid, &init_pid_ns);
608 p = find_task_by_vpid(pid);
610 domain = tomoyo_real_domain(p);
611 read_unlock(&tasklist_lock);
613 } else if (!strncmp(data, "domain=", 7)) {
614 if (tomoyo_domain_def(data + 7))
615 domain = tomoyo_find_domain(data + 7);
618 head->write_var1 = domain;
619 /* Accessing read_buf is safe because head->io_sem is held. */
621 return true; /* Do nothing if open(O_WRONLY). */
622 head->read_avail = 0;
623 tomoyo_io_printf(head, "# select %s\n", data);
624 head->read_single_domain = true;
625 head->read_eof = !domain;
627 struct tomoyo_domain_info *d;
628 head->read_var1 = NULL;
629 list_for_each_entry_rcu(d, &tomoyo_domain_list, list) {
632 head->read_var1 = &d->list;
634 head->read_var2 = NULL;
637 if (domain->is_deleted)
638 tomoyo_io_printf(head, "# This is a deleted domain.\n");
644 * tomoyo_delete_domain - Delete a domain.
646 * @domainname: The name of domain.
650 * Caller holds tomoyo_read_lock().
652 static int tomoyo_delete_domain(char *domainname)
654 struct tomoyo_domain_info *domain;
655 struct tomoyo_path_info name;
657 name.name = domainname;
658 tomoyo_fill_path_info(&name);
659 if (mutex_lock_interruptible(&tomoyo_policy_lock))
661 /* Is there an active domain? */
662 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
663 /* Never delete tomoyo_kernel_domain */
664 if (domain == &tomoyo_kernel_domain)
666 if (domain->is_deleted ||
667 tomoyo_pathcmp(domain->domainname, &name))
669 domain->is_deleted = true;
672 mutex_unlock(&tomoyo_policy_lock);
677 * tomoyo_write_domain_policy2 - Write domain policy.
679 * @head: Pointer to "struct tomoyo_io_buffer".
681 * Returns 0 on success, negative value otherwise.
683 * Caller holds tomoyo_read_lock().
685 static int tomoyo_write_domain_policy2(char *data,
686 struct tomoyo_domain_info *domain,
687 const bool is_delete)
689 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_MOUNT))
690 return tomoyo_write_mount_policy(data, domain, is_delete);
691 return tomoyo_write_file_policy(data, domain, is_delete);
695 * tomoyo_write_domain_policy - Write domain policy.
697 * @head: Pointer to "struct tomoyo_io_buffer".
699 * Returns 0 on success, negative value otherwise.
701 * Caller holds tomoyo_read_lock().
703 static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
705 char *data = head->write_buf;
706 struct tomoyo_domain_info *domain = head->write_var1;
707 bool is_delete = false;
708 bool is_select = false;
709 unsigned int profile;
711 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE))
713 else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT))
715 if (is_select && tomoyo_select_one(head, data))
717 /* Don't allow updating policies by non manager programs. */
718 if (!tomoyo_policy_manager())
720 if (tomoyo_domain_def(data)) {
723 tomoyo_delete_domain(data);
725 domain = tomoyo_find_domain(data);
727 domain = tomoyo_find_or_assign_new_domain(data, 0);
728 head->write_var1 = domain;
734 if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1
735 && profile < TOMOYO_MAX_PROFILES) {
736 if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)
737 domain->profile = (u8) profile;
740 if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) {
741 domain->ignore_global_allow_read = !is_delete;
744 if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) {
745 domain->quota_warned = !is_delete;
748 if (!strcmp(data, TOMOYO_KEYWORD_TRANSITION_FAILED)) {
749 domain->transition_failed = !is_delete;
752 return tomoyo_write_domain_policy2(data, domain, is_delete);
756 * tomoyo_print_path_acl - Print a single path ACL entry.
758 * @head: Pointer to "struct tomoyo_io_buffer".
759 * @ptr: Pointer to "struct tomoyo_path_acl".
761 * Returns true on success, false otherwise.
763 static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head,
764 struct tomoyo_path_acl *ptr)
768 const u16 perm = ptr->perm;
770 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
771 if (!(perm & (1 << bit)))
773 /* Print "read/write" instead of "read" and "write". */
774 if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE)
775 && (perm & (1 << TOMOYO_TYPE_READ_WRITE)))
777 pos = head->read_avail;
778 if (!tomoyo_io_printf(head, "allow_%s ",
779 tomoyo_path_keyword[bit]) ||
780 !tomoyo_print_name_union(head, &ptr->name) ||
781 !tomoyo_io_printf(head, "\n"))
787 head->read_bit = bit;
788 head->read_avail = pos;
793 * tomoyo_print_path2_acl - Print a double path ACL entry.
795 * @head: Pointer to "struct tomoyo_io_buffer".
796 * @ptr: Pointer to "struct tomoyo_path2_acl".
798 * Returns true on success, false otherwise.
800 static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer *head,
801 struct tomoyo_path2_acl *ptr)
804 const u8 perm = ptr->perm;
807 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
808 if (!(perm & (1 << bit)))
810 pos = head->read_avail;
811 if (!tomoyo_io_printf(head, "allow_%s ",
812 tomoyo_path2_keyword[bit]) ||
813 !tomoyo_print_name_union(head, &ptr->name1) ||
814 !tomoyo_print_name_union(head, &ptr->name2) ||
815 !tomoyo_io_printf(head, "\n"))
821 head->read_bit = bit;
822 head->read_avail = pos;
827 * tomoyo_print_path_number_acl - Print a path_number ACL entry.
829 * @head: Pointer to "struct tomoyo_io_buffer".
830 * @ptr: Pointer to "struct tomoyo_path_number_acl".
832 * Returns true on success, false otherwise.
834 static bool tomoyo_print_path_number_acl(struct tomoyo_io_buffer *head,
835 struct tomoyo_path_number_acl *ptr)
839 const u8 perm = ptr->perm;
840 for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION;
842 if (!(perm & (1 << bit)))
844 pos = head->read_avail;
845 if (!tomoyo_io_printf(head, "allow_%s",
846 tomoyo_path_number_keyword[bit]) ||
847 !tomoyo_print_name_union(head, &ptr->name) ||
848 !tomoyo_print_number_union(head, &ptr->number) ||
849 !tomoyo_io_printf(head, "\n"))
855 head->read_bit = bit;
856 head->read_avail = pos;
861 * tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
863 * @head: Pointer to "struct tomoyo_io_buffer".
864 * @ptr: Pointer to "struct tomoyo_mkdev_acl".
866 * Returns true on success, false otherwise.
868 static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer *head,
869 struct tomoyo_mkdev_acl *ptr)
873 const u16 perm = ptr->perm;
874 for (bit = head->read_bit; bit < TOMOYO_MAX_MKDEV_OPERATION;
876 if (!(perm & (1 << bit)))
878 pos = head->read_avail;
879 if (!tomoyo_io_printf(head, "allow_%s",
880 tomoyo_mkdev_keyword[bit]) ||
881 !tomoyo_print_name_union(head, &ptr->name) ||
882 !tomoyo_print_number_union(head, &ptr->mode) ||
883 !tomoyo_print_number_union(head, &ptr->major) ||
884 !tomoyo_print_number_union(head, &ptr->minor) ||
885 !tomoyo_io_printf(head, "\n"))
891 head->read_bit = bit;
892 head->read_avail = pos;
897 * tomoyo_print_mount_acl - Print a mount ACL entry.
899 * @head: Pointer to "struct tomoyo_io_buffer".
900 * @ptr: Pointer to "struct tomoyo_mount_acl".
902 * Returns true on success, false otherwise.
904 static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer *head,
905 struct tomoyo_mount_acl *ptr)
907 const int pos = head->read_avail;
908 if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_MOUNT) ||
909 !tomoyo_print_name_union(head, &ptr->dev_name) ||
910 !tomoyo_print_name_union(head, &ptr->dir_name) ||
911 !tomoyo_print_name_union(head, &ptr->fs_type) ||
912 !tomoyo_print_number_union(head, &ptr->flags) ||
913 !tomoyo_io_printf(head, "\n")) {
914 head->read_avail = pos;
921 * tomoyo_print_entry - Print an ACL entry.
923 * @head: Pointer to "struct tomoyo_io_buffer".
924 * @ptr: Pointer to an ACL entry.
926 * Returns true on success, false otherwise.
928 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
929 struct tomoyo_acl_info *ptr)
931 const u8 acl_type = ptr->type;
935 if (acl_type == TOMOYO_TYPE_PATH_ACL) {
936 struct tomoyo_path_acl *acl
937 = container_of(ptr, struct tomoyo_path_acl, head);
938 return tomoyo_print_path_acl(head, acl);
940 if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
941 struct tomoyo_path2_acl *acl
942 = container_of(ptr, struct tomoyo_path2_acl, head);
943 return tomoyo_print_path2_acl(head, acl);
945 if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
946 struct tomoyo_path_number_acl *acl
947 = container_of(ptr, struct tomoyo_path_number_acl,
949 return tomoyo_print_path_number_acl(head, acl);
951 if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
952 struct tomoyo_mkdev_acl *acl
953 = container_of(ptr, struct tomoyo_mkdev_acl,
955 return tomoyo_print_mkdev_acl(head, acl);
957 if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
958 struct tomoyo_mount_acl *acl
959 = container_of(ptr, struct tomoyo_mount_acl, head);
960 return tomoyo_print_mount_acl(head, acl);
962 BUG(); /* This must not happen. */
967 * tomoyo_read_domain_policy - Read domain policy.
969 * @head: Pointer to "struct tomoyo_io_buffer".
971 * Caller holds tomoyo_read_lock().
973 static void tomoyo_read_domain_policy(struct tomoyo_io_buffer *head)
975 struct list_head *dpos;
976 struct list_head *apos;
981 if (head->read_step == 0)
983 list_for_each_cookie(dpos, head->read_var1, &tomoyo_domain_list) {
984 struct tomoyo_domain_info *domain;
985 const char *quota_exceeded = "";
986 const char *transition_failed = "";
987 const char *ignore_global_allow_read = "";
988 domain = list_entry(dpos, struct tomoyo_domain_info, list);
989 if (head->read_step != 1)
991 if (domain->is_deleted && !head->read_single_domain)
993 /* Print domainname and flags. */
994 if (domain->quota_warned)
995 quota_exceeded = "quota_exceeded\n";
996 if (domain->transition_failed)
997 transition_failed = "transition_failed\n";
998 if (domain->ignore_global_allow_read)
999 ignore_global_allow_read
1000 = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n";
1001 done = tomoyo_io_printf(head, "%s\n" TOMOYO_KEYWORD_USE_PROFILE
1003 domain->domainname->name,
1004 domain->profile, quota_exceeded,
1006 ignore_global_allow_read);
1009 head->read_step = 2;
1011 if (head->read_step == 3)
1013 /* Print ACL entries in the domain. */
1014 list_for_each_cookie(apos, head->read_var2,
1015 &domain->acl_info_list) {
1016 struct tomoyo_acl_info *ptr
1017 = list_entry(apos, struct tomoyo_acl_info,
1019 done = tomoyo_print_entry(head, ptr);
1025 head->read_step = 3;
1027 done = tomoyo_io_printf(head, "\n");
1030 head->read_step = 1;
1031 if (head->read_single_domain)
1034 head->read_eof = done;
1038 * tomoyo_write_domain_profile - Assign profile for specified domain.
1040 * @head: Pointer to "struct tomoyo_io_buffer".
1042 * Returns 0 on success, -EINVAL otherwise.
1044 * This is equivalent to doing
1046 * ( echo "select " $domainname; echo "use_profile " $profile ) |
1047 * /usr/sbin/tomoyo-loadpolicy -d
1049 * Caller holds tomoyo_read_lock().
1051 static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head)
1053 char *data = head->write_buf;
1054 char *cp = strchr(data, ' ');
1055 struct tomoyo_domain_info *domain;
1056 unsigned long profile;
1061 domain = tomoyo_find_domain(cp + 1);
1062 if (strict_strtoul(data, 10, &profile))
1064 if (domain && profile < TOMOYO_MAX_PROFILES
1065 && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded))
1066 domain->profile = (u8) profile;
1071 * tomoyo_read_domain_profile - Read only domainname and profile.
1073 * @head: Pointer to "struct tomoyo_io_buffer".
1075 * Returns list of profile number and domainname pairs.
1077 * This is equivalent to doing
1079 * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
1080 * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" )
1081 * domainname = $0; } else if ( $1 == "use_profile" ) {
1082 * print $2 " " domainname; domainname = ""; } } ; '
1084 * Caller holds tomoyo_read_lock().
1086 static void tomoyo_read_domain_profile(struct tomoyo_io_buffer *head)
1088 struct list_head *pos;
1093 list_for_each_cookie(pos, head->read_var1, &tomoyo_domain_list) {
1094 struct tomoyo_domain_info *domain;
1095 domain = list_entry(pos, struct tomoyo_domain_info, list);
1096 if (domain->is_deleted)
1098 done = tomoyo_io_printf(head, "%u %s\n", domain->profile,
1099 domain->domainname->name);
1103 head->read_eof = done;
1107 * tomoyo_write_pid: Specify PID to obtain domainname.
1109 * @head: Pointer to "struct tomoyo_io_buffer".
1113 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1116 /* No error check. */
1117 strict_strtoul(head->write_buf, 10, &pid);
1118 head->read_step = (int) pid;
1119 head->read_eof = false;
1124 * tomoyo_read_pid - Get domainname of the specified PID.
1126 * @head: Pointer to "struct tomoyo_io_buffer".
1128 * Returns the domainname which the specified PID is in on success,
1129 * empty string otherwise.
1130 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1131 * using read()/write() interface rather than sysctl() interface.
1133 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1135 if (head->read_avail == 0 && !head->read_eof) {
1136 const int pid = head->read_step;
1137 struct task_struct *p;
1138 struct tomoyo_domain_info *domain = NULL;
1140 read_lock(&tasklist_lock);
1141 p = find_task_by_vpid(pid);
1143 domain = tomoyo_real_domain(p);
1144 read_unlock(&tasklist_lock);
1147 tomoyo_io_printf(head, "%d %u %s", pid, domain->profile,
1148 domain->domainname->name);
1149 head->read_eof = true;
1154 * tomoyo_write_exception_policy - Write exception policy.
1156 * @head: Pointer to "struct tomoyo_io_buffer".
1158 * Returns 0 on success, negative value otherwise.
1160 * Caller holds tomoyo_read_lock().
1162 static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head)
1164 char *data = head->write_buf;
1165 bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE);
1167 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_KEEP_DOMAIN))
1168 return tomoyo_write_domain_keeper_policy(data, false,
1170 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_KEEP_DOMAIN))
1171 return tomoyo_write_domain_keeper_policy(data, true, is_delete);
1172 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_INITIALIZE_DOMAIN))
1173 return tomoyo_write_domain_initializer_policy(data, false,
1175 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN))
1176 return tomoyo_write_domain_initializer_policy(data, true,
1178 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_AGGREGATOR))
1179 return tomoyo_write_aggregator_policy(data, is_delete);
1180 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALIAS))
1181 return tomoyo_write_alias_policy(data, is_delete);
1182 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ))
1183 return tomoyo_write_globally_readable_policy(data, is_delete);
1184 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN))
1185 return tomoyo_write_pattern_policy(data, is_delete);
1186 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE))
1187 return tomoyo_write_no_rewrite_policy(data, is_delete);
1188 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_PATH_GROUP))
1189 return tomoyo_write_path_group_policy(data, is_delete);
1190 if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NUMBER_GROUP))
1191 return tomoyo_write_number_group_policy(data, is_delete);
1196 * tomoyo_read_exception_policy - Read exception policy.
1198 * @head: Pointer to "struct tomoyo_io_buffer".
1200 * Caller holds tomoyo_read_lock().
1202 static void tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
1204 if (!head->read_eof) {
1205 switch (head->read_step) {
1207 head->read_var2 = NULL;
1208 head->read_step = 1;
1210 if (!tomoyo_read_domain_keeper_policy(head))
1212 head->read_var2 = NULL;
1213 head->read_step = 2;
1215 if (!tomoyo_read_globally_readable_policy(head))
1217 head->read_var2 = NULL;
1218 head->read_step = 3;
1220 head->read_var2 = NULL;
1221 head->read_step = 4;
1223 if (!tomoyo_read_domain_initializer_policy(head))
1225 head->read_var2 = NULL;
1226 head->read_step = 5;
1228 if (!tomoyo_read_alias_policy(head))
1230 head->read_var2 = NULL;
1231 head->read_step = 6;
1233 if (!tomoyo_read_aggregator_policy(head))
1235 head->read_var2 = NULL;
1236 head->read_step = 7;
1238 if (!tomoyo_read_file_pattern(head))
1240 head->read_var2 = NULL;
1241 head->read_step = 8;
1243 if (!tomoyo_read_no_rewrite_policy(head))
1245 head->read_var2 = NULL;
1246 head->read_step = 9;
1248 if (!tomoyo_read_path_group_policy(head))
1250 head->read_var1 = NULL;
1251 head->read_var2 = NULL;
1252 head->read_step = 10;
1254 if (!tomoyo_read_number_group_policy(head))
1256 head->read_var1 = NULL;
1257 head->read_var2 = NULL;
1258 head->read_step = 11;
1260 head->read_eof = true;
1267 * tomoyo_print_header - Get header line of audit log.
1269 * @r: Pointer to "struct tomoyo_request_info".
1271 * Returns string representation.
1273 * This function uses kmalloc(), so caller must kfree() if this function
1274 * didn't return NULL.
1276 static char *tomoyo_print_header(struct tomoyo_request_info *r)
1278 static const char *tomoyo_mode_4[4] = {
1279 "disabled", "learning", "permissive", "enforcing"
1282 const pid_t gpid = task_pid_nr(current);
1283 static const int tomoyo_buffer_len = 4096;
1284 char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
1287 do_gettimeofday(&tv);
1288 snprintf(buffer, tomoyo_buffer_len - 1,
1289 "#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
1290 " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
1291 " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
1292 tv.tv_sec, r->profile, tomoyo_mode_4[r->mode], gpid,
1293 (pid_t) sys_getpid(), (pid_t) sys_getppid(),
1294 current_uid(), current_gid(), current_euid(),
1295 current_egid(), current_suid(), current_sgid(),
1296 current_fsuid(), current_fsgid());
1301 * tomoyo_init_audit_log - Allocate buffer for audit logs.
1303 * @len: Required size.
1304 * @r: Pointer to "struct tomoyo_request_info".
1306 * Returns pointer to allocated memory.
1308 * The @len is updated to add the header lines' size on success.
1310 * This function uses kzalloc(), so caller must kfree() if this function
1311 * didn't return NULL.
1313 static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r)
1317 const char *domainname;
1319 r->domain = tomoyo_domain();
1320 domainname = r->domain->domainname->name;
1321 header = tomoyo_print_header(r);
1324 *len += strlen(domainname) + strlen(header) + 10;
1325 buf = kzalloc(*len, GFP_NOFS);
1327 snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname);
1332 /* Wait queue for tomoyo_query_list. */
1333 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1335 /* Lock for manipulating tomoyo_query_list. */
1336 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1338 /* Structure for query. */
1339 struct tomoyo_query_entry {
1340 struct list_head list;
1343 unsigned int serial;
1348 /* The list for "struct tomoyo_query_entry". */
1349 static LIST_HEAD(tomoyo_query_list);
1352 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1355 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1358 * tomoyo_supervisor - Ask for the supervisor's decision.
1360 * @r: Pointer to "struct tomoyo_request_info".
1361 * @fmt: The printf()'s format string, followed by parameters.
1363 * Returns 0 if the supervisor decided to permit the access request which
1364 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1365 * supervisor decided to retry the access request which violated the policy in
1366 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1368 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1374 static unsigned int tomoyo_serial;
1375 struct tomoyo_query_entry *tomoyo_query_entry = NULL;
1376 bool quota_exceeded = false;
1380 case TOMOYO_CONFIG_LEARNING:
1381 if (!tomoyo_domain_quota_is_ok(r))
1383 va_start(args, fmt);
1384 len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4;
1386 buffer = kmalloc(len, GFP_NOFS);
1389 va_start(args, fmt);
1390 vsnprintf(buffer, len - 1, fmt, args);
1392 tomoyo_normalize_line(buffer);
1393 tomoyo_write_domain_policy2(buffer, r->domain, false);
1396 case TOMOYO_CONFIG_PERMISSIVE:
1400 r->domain = tomoyo_domain();
1401 if (!atomic_read(&tomoyo_query_observers))
1403 va_start(args, fmt);
1404 len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32;
1406 header = tomoyo_init_audit_log(&len, r);
1409 tomoyo_query_entry = kzalloc(sizeof(*tomoyo_query_entry), GFP_NOFS);
1410 if (!tomoyo_query_entry)
1412 tomoyo_query_entry->query = kzalloc(len, GFP_NOFS);
1413 if (!tomoyo_query_entry->query)
1415 len = ksize(tomoyo_query_entry->query);
1416 INIT_LIST_HEAD(&tomoyo_query_entry->list);
1417 spin_lock(&tomoyo_query_list_lock);
1418 if (tomoyo_quota_for_query && tomoyo_query_memory_size + len +
1419 sizeof(*tomoyo_query_entry) >= tomoyo_quota_for_query) {
1420 quota_exceeded = true;
1422 tomoyo_query_memory_size += len + sizeof(*tomoyo_query_entry);
1423 tomoyo_query_entry->serial = tomoyo_serial++;
1425 spin_unlock(&tomoyo_query_list_lock);
1428 pos = snprintf(tomoyo_query_entry->query, len - 1, "Q%u-%hu\n%s",
1429 tomoyo_query_entry->serial, r->retry, header);
1432 va_start(args, fmt);
1433 vsnprintf(tomoyo_query_entry->query + pos, len - 1 - pos, fmt, args);
1434 tomoyo_query_entry->query_len = strlen(tomoyo_query_entry->query) + 1;
1436 spin_lock(&tomoyo_query_list_lock);
1437 list_add_tail(&tomoyo_query_entry->list, &tomoyo_query_list);
1438 spin_unlock(&tomoyo_query_list_lock);
1439 /* Give 10 seconds for supervisor's opinion. */
1440 for (tomoyo_query_entry->timer = 0;
1441 atomic_read(&tomoyo_query_observers) && tomoyo_query_entry->timer < 100;
1442 tomoyo_query_entry->timer++) {
1443 wake_up(&tomoyo_query_wait);
1444 set_current_state(TASK_INTERRUPTIBLE);
1445 schedule_timeout(HZ / 10);
1446 if (tomoyo_query_entry->answer)
1449 spin_lock(&tomoyo_query_list_lock);
1450 list_del(&tomoyo_query_entry->list);
1451 tomoyo_query_memory_size -= len + sizeof(*tomoyo_query_entry);
1452 spin_unlock(&tomoyo_query_list_lock);
1453 switch (tomoyo_query_entry->answer) {
1454 case 3: /* Asked to retry by administrator. */
1455 error = TOMOYO_RETRY_REQUEST;
1459 /* Granted by administrator. */
1466 /* Rejected by administrator. */
1470 if (tomoyo_query_entry)
1471 kfree(tomoyo_query_entry->query);
1472 kfree(tomoyo_query_entry);
1478 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1480 * @file: Pointer to "struct file".
1481 * @wait: Pointer to "poll_table".
1483 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1485 * Waits for access requests which violated policy in enforcing mode.
1487 static int tomoyo_poll_query(struct file *file, poll_table *wait)
1489 struct list_head *tmp;
1492 for (i = 0; i < 2; i++) {
1493 spin_lock(&tomoyo_query_list_lock);
1494 list_for_each(tmp, &tomoyo_query_list) {
1495 struct tomoyo_query_entry *ptr
1496 = list_entry(tmp, struct tomoyo_query_entry,
1503 spin_unlock(&tomoyo_query_list_lock);
1505 return POLLIN | POLLRDNORM;
1508 poll_wait(file, &tomoyo_query_wait, wait);
1514 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1516 * @head: Pointer to "struct tomoyo_io_buffer".
1518 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
1520 struct list_head *tmp;
1524 if (head->read_avail)
1526 if (head->read_buf) {
1527 kfree(head->read_buf);
1528 head->read_buf = NULL;
1529 head->readbuf_size = 0;
1531 spin_lock(&tomoyo_query_list_lock);
1532 list_for_each(tmp, &tomoyo_query_list) {
1533 struct tomoyo_query_entry *ptr
1534 = list_entry(tmp, struct tomoyo_query_entry, list);
1537 if (pos++ != head->read_step)
1539 len = ptr->query_len;
1542 spin_unlock(&tomoyo_query_list_lock);
1544 head->read_step = 0;
1547 buf = kzalloc(len, GFP_NOFS);
1551 spin_lock(&tomoyo_query_list_lock);
1552 list_for_each(tmp, &tomoyo_query_list) {
1553 struct tomoyo_query_entry *ptr
1554 = list_entry(tmp, struct tomoyo_query_entry, list);
1557 if (pos++ != head->read_step)
1560 * Some query can be skipped because tomoyo_query_list
1561 * can change, but I don't care.
1563 if (len == ptr->query_len)
1564 memmove(buf, ptr->query, len);
1567 spin_unlock(&tomoyo_query_list_lock);
1569 head->read_avail = len;
1570 head->readbuf_size = head->read_avail;
1571 head->read_buf = buf;
1579 * tomoyo_write_answer - Write the supervisor's decision.
1581 * @head: Pointer to "struct tomoyo_io_buffer".
1583 * Returns 0 on success, -EINVAL otherwise.
1585 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
1587 char *data = head->write_buf;
1588 struct list_head *tmp;
1589 unsigned int serial;
1590 unsigned int answer;
1591 spin_lock(&tomoyo_query_list_lock);
1592 list_for_each(tmp, &tomoyo_query_list) {
1593 struct tomoyo_query_entry *ptr
1594 = list_entry(tmp, struct tomoyo_query_entry, list);
1597 spin_unlock(&tomoyo_query_list_lock);
1598 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
1600 spin_lock(&tomoyo_query_list_lock);
1601 list_for_each(tmp, &tomoyo_query_list) {
1602 struct tomoyo_query_entry *ptr
1603 = list_entry(tmp, struct tomoyo_query_entry, list);
1604 if (ptr->serial != serial)
1607 ptr->answer = answer;
1610 spin_unlock(&tomoyo_query_list_lock);
1615 * tomoyo_read_version: Get version.
1617 * @head: Pointer to "struct tomoyo_io_buffer".
1619 * Returns version information.
1621 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
1623 if (!head->read_eof) {
1624 tomoyo_io_printf(head, "2.3.0-pre");
1625 head->read_eof = true;
1630 * tomoyo_read_self_domain - Get the current process's domainname.
1632 * @head: Pointer to "struct tomoyo_io_buffer".
1634 * Returns the current process's domainname.
1636 static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
1638 if (!head->read_eof) {
1640 * tomoyo_domain()->domainname != NULL
1641 * because every process belongs to a domain and
1642 * the domain's name cannot be NULL.
1644 tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
1645 head->read_eof = true;
1650 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
1652 * @type: Type of interface.
1653 * @file: Pointer to "struct file".
1655 * Associates policy handler and returns 0 on success, -ENOMEM otherwise.
1657 * Caller acquires tomoyo_read_lock().
1659 int tomoyo_open_control(const u8 type, struct file *file)
1661 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
1665 mutex_init(&head->io_sem);
1668 case TOMOYO_DOMAINPOLICY:
1669 /* /sys/kernel/security/tomoyo/domain_policy */
1670 head->write = tomoyo_write_domain_policy;
1671 head->read = tomoyo_read_domain_policy;
1673 case TOMOYO_EXCEPTIONPOLICY:
1674 /* /sys/kernel/security/tomoyo/exception_policy */
1675 head->write = tomoyo_write_exception_policy;
1676 head->read = tomoyo_read_exception_policy;
1678 case TOMOYO_SELFDOMAIN:
1679 /* /sys/kernel/security/tomoyo/self_domain */
1680 head->read = tomoyo_read_self_domain;
1682 case TOMOYO_DOMAIN_STATUS:
1683 /* /sys/kernel/security/tomoyo/.domain_status */
1684 head->write = tomoyo_write_domain_profile;
1685 head->read = tomoyo_read_domain_profile;
1687 case TOMOYO_PROCESS_STATUS:
1688 /* /sys/kernel/security/tomoyo/.process_status */
1689 head->write = tomoyo_write_pid;
1690 head->read = tomoyo_read_pid;
1692 case TOMOYO_VERSION:
1693 /* /sys/kernel/security/tomoyo/version */
1694 head->read = tomoyo_read_version;
1695 head->readbuf_size = 128;
1697 case TOMOYO_MEMINFO:
1698 /* /sys/kernel/security/tomoyo/meminfo */
1699 head->write = tomoyo_write_memory_quota;
1700 head->read = tomoyo_read_memory_counter;
1701 head->readbuf_size = 512;
1703 case TOMOYO_PROFILE:
1704 /* /sys/kernel/security/tomoyo/profile */
1705 head->write = tomoyo_write_profile;
1706 head->read = tomoyo_read_profile;
1708 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
1709 head->poll = tomoyo_poll_query;
1710 head->write = tomoyo_write_answer;
1711 head->read = tomoyo_read_query;
1713 case TOMOYO_MANAGER:
1714 /* /sys/kernel/security/tomoyo/manager */
1715 head->write = tomoyo_write_manager_policy;
1716 head->read = tomoyo_read_manager_policy;
1719 if (!(file->f_mode & FMODE_READ)) {
1721 * No need to allocate read_buf since it is not opened
1726 } else if (!head->poll) {
1727 /* Don't allocate read_buf for poll() access. */
1728 if (!head->readbuf_size)
1729 head->readbuf_size = 4096 * 2;
1730 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
1731 if (!head->read_buf) {
1736 if (!(file->f_mode & FMODE_WRITE)) {
1738 * No need to allocate write_buf since it is not opened
1742 } else if (head->write) {
1743 head->writebuf_size = 4096 * 2;
1744 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
1745 if (!head->write_buf) {
1746 kfree(head->read_buf);
1751 if (type != TOMOYO_QUERY)
1752 head->reader_idx = tomoyo_read_lock();
1753 file->private_data = head;
1755 * Call the handler now if the file is
1756 * /sys/kernel/security/tomoyo/self_domain
1757 * so that the user can use
1758 * cat < /sys/kernel/security/tomoyo/self_domain"
1759 * to know the current process's domainname.
1761 if (type == TOMOYO_SELFDOMAIN)
1762 tomoyo_read_control(file, NULL, 0);
1764 * If the file is /sys/kernel/security/tomoyo/query , increment the
1766 * The obserber counter is used by tomoyo_supervisor() to see if
1767 * there is some process monitoring /sys/kernel/security/tomoyo/query.
1769 else if (type == TOMOYO_QUERY)
1770 atomic_inc(&tomoyo_query_observers);
1775 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
1777 * @file: Pointer to "struct file".
1778 * @wait: Pointer to "poll_table".
1780 * Waits for read readiness.
1781 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
1783 int tomoyo_poll_control(struct file *file, poll_table *wait)
1785 struct tomoyo_io_buffer *head = file->private_data;
1788 return head->poll(file, wait);
1792 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
1794 * @file: Pointer to "struct file".
1795 * @buffer: Poiner to buffer to write to.
1796 * @buffer_len: Size of @buffer.
1798 * Returns bytes read on success, negative value otherwise.
1800 * Caller holds tomoyo_read_lock().
1802 int tomoyo_read_control(struct file *file, char __user *buffer,
1803 const int buffer_len)
1806 struct tomoyo_io_buffer *head = file->private_data;
1811 if (mutex_lock_interruptible(&head->io_sem))
1813 /* Call the policy handler. */
1817 /* Write to buffer. */
1818 len = head->read_avail;
1819 if (len > buffer_len)
1823 /* head->read_buf changes by some functions. */
1824 cp = head->read_buf;
1825 if (copy_to_user(buffer, cp, len)) {
1829 head->read_avail -= len;
1830 memmove(cp, cp + len, head->read_avail);
1832 mutex_unlock(&head->io_sem);
1837 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
1839 * @file: Pointer to "struct file".
1840 * @buffer: Pointer to buffer to read from.
1841 * @buffer_len: Size of @buffer.
1843 * Returns @buffer_len on success, negative value otherwise.
1845 * Caller holds tomoyo_read_lock().
1847 int tomoyo_write_control(struct file *file, const char __user *buffer,
1848 const int buffer_len)
1850 struct tomoyo_io_buffer *head = file->private_data;
1851 int error = buffer_len;
1852 int avail_len = buffer_len;
1853 char *cp0 = head->write_buf;
1857 if (!access_ok(VERIFY_READ, buffer, buffer_len))
1859 /* Don't allow updating policies by non manager programs. */
1860 if (head->write != tomoyo_write_pid &&
1861 head->write != tomoyo_write_domain_policy &&
1862 !tomoyo_policy_manager())
1864 if (mutex_lock_interruptible(&head->io_sem))
1866 /* Read a line and dispatch it to the policy handler. */
1867 while (avail_len > 0) {
1869 if (head->write_avail >= head->writebuf_size - 1) {
1872 } else if (get_user(c, buffer)) {
1878 cp0[head->write_avail++] = c;
1881 cp0[head->write_avail - 1] = '\0';
1882 head->write_avail = 0;
1883 tomoyo_normalize_line(cp0);
1886 mutex_unlock(&head->io_sem);
1891 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
1893 * @file: Pointer to "struct file".
1895 * Releases memory and returns 0.
1897 * Caller looses tomoyo_read_lock().
1899 int tomoyo_close_control(struct file *file)
1901 struct tomoyo_io_buffer *head = file->private_data;
1902 const bool is_write = !!head->write_buf;
1905 * If the file is /sys/kernel/security/tomoyo/query , decrement the
1908 if (head->type == TOMOYO_QUERY)
1909 atomic_dec(&tomoyo_query_observers);
1911 tomoyo_read_unlock(head->reader_idx);
1912 /* Release memory used for policy I/O. */
1913 kfree(head->read_buf);
1914 head->read_buf = NULL;
1915 kfree(head->write_buf);
1916 head->write_buf = NULL;
1919 file->private_data = NULL;
1926 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
1928 void tomoyo_check_profile(void)
1930 struct tomoyo_domain_info *domain;
1931 const int idx = tomoyo_read_lock();
1932 tomoyo_policy_loaded = true;
1933 /* Check all profiles currently assigned to domains are defined. */
1934 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
1935 const u8 profile = domain->profile;
1936 if (tomoyo_profile_ptr[profile])
1938 panic("Profile %u (used by '%s') not defined.\n",
1939 profile, domain->domainname->name);
1941 tomoyo_read_unlock(idx);
1942 if (tomoyo_profile_version != 20090903)
1943 panic("Profile version %u is not supported.\n",
1944 tomoyo_profile_version);
1945 printk(KERN_INFO "TOMOYO: 2.3.0-pre 2010/06/03\n");
1946 printk(KERN_INFO "Mandatory Access Control activated.\n");