blob: c8439cf2a448869820cc5dbf175c45956d9d7698 [file] [log] [blame]
Kentaro Takeda95908372009-02-05 17:18:13 +09001/*
2 * security/tomoyo/common.c
3 *
Tetsuo Handa0f2a55d2011-07-14 14:46:51 +09004 * Copyright (C) 2005-2011 NTT DATA CORPORATION
Kentaro Takeda95908372009-02-05 17:18:13 +09005 */
6
7#include <linux/uaccess.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09008#include <linux/slab.h>
Kentaro Takeda95908372009-02-05 17:18:13 +09009#include <linux/security.h>
Kentaro Takeda95908372009-02-05 17:18:13 +090010#include "common.h"
Kentaro Takeda95908372009-02-05 17:18:13 +090011
Tetsuo Handaeadd99c2011-06-26 23:18:58 +090012/* String table for operation mode. */
13const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
14 [TOMOYO_CONFIG_DISABLED] = "disabled",
15 [TOMOYO_CONFIG_LEARNING] = "learning",
16 [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
17 [TOMOYO_CONFIG_ENFORCING] = "enforcing"
Kentaro Takeda95908372009-02-05 17:18:13 +090018};
Kentaro Takeda95908372009-02-05 17:18:13 +090019
Tetsuo Handa57c25902010-06-03 20:38:44 +090020/* String table for /sys/kernel/security/tomoyo/profile */
Tetsuo Handa2c47ab92011-06-26 23:21:19 +090021const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
Tetsuo Handa57c25902010-06-03 20:38:44 +090022 + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
Tetsuo Handa2c47ab92011-06-26 23:21:19 +090023 [TOMOYO_MAC_FILE_EXECUTE] = "execute",
24 [TOMOYO_MAC_FILE_OPEN] = "open",
25 [TOMOYO_MAC_FILE_CREATE] = "create",
26 [TOMOYO_MAC_FILE_UNLINK] = "unlink",
27 [TOMOYO_MAC_FILE_GETATTR] = "getattr",
28 [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
29 [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
30 [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
31 [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
32 [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
33 [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
34 [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
35 [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
36 [TOMOYO_MAC_FILE_LINK] = "link",
37 [TOMOYO_MAC_FILE_RENAME] = "rename",
38 [TOMOYO_MAC_FILE_CHMOD] = "chmod",
39 [TOMOYO_MAC_FILE_CHOWN] = "chown",
40 [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
41 [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
42 [TOMOYO_MAC_FILE_CHROOT] = "chroot",
43 [TOMOYO_MAC_FILE_MOUNT] = "mount",
44 [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
45 [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
Tetsuo Handa57c25902010-06-03 20:38:44 +090046 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
Kentaro Takeda95908372009-02-05 17:18:13 +090047};
48
Tetsuo Handa2066a362011-07-08 13:21:37 +090049/* String table for conditions. */
50const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
51 [TOMOYO_TASK_UID] = "task.uid",
52 [TOMOYO_TASK_EUID] = "task.euid",
53 [TOMOYO_TASK_SUID] = "task.suid",
54 [TOMOYO_TASK_FSUID] = "task.fsuid",
55 [TOMOYO_TASK_GID] = "task.gid",
56 [TOMOYO_TASK_EGID] = "task.egid",
57 [TOMOYO_TASK_SGID] = "task.sgid",
58 [TOMOYO_TASK_FSGID] = "task.fsgid",
59 [TOMOYO_TASK_PID] = "task.pid",
60 [TOMOYO_TASK_PPID] = "task.ppid",
Tetsuo Handa5b636852011-07-08 13:24:54 +090061 [TOMOYO_EXEC_ARGC] = "exec.argc",
62 [TOMOYO_EXEC_ENVC] = "exec.envc",
Tetsuo Handa8761afd2011-07-08 13:22:41 +090063 [TOMOYO_TYPE_IS_SOCKET] = "socket",
64 [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
65 [TOMOYO_TYPE_IS_FILE] = "file",
66 [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
67 [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
68 [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
69 [TOMOYO_TYPE_IS_FIFO] = "fifo",
70 [TOMOYO_MODE_SETUID] = "setuid",
71 [TOMOYO_MODE_SETGID] = "setgid",
72 [TOMOYO_MODE_STICKY] = "sticky",
73 [TOMOYO_MODE_OWNER_READ] = "owner_read",
74 [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
75 [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
76 [TOMOYO_MODE_GROUP_READ] = "group_read",
77 [TOMOYO_MODE_GROUP_WRITE] = "group_write",
78 [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
79 [TOMOYO_MODE_OTHERS_READ] = "others_read",
80 [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
81 [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +090082 [TOMOYO_EXEC_REALPATH] = "exec.realpath",
83 [TOMOYO_SYMLINK_TARGET] = "symlink.target",
Tetsuo Handa8761afd2011-07-08 13:22:41 +090084 [TOMOYO_PATH1_UID] = "path1.uid",
85 [TOMOYO_PATH1_GID] = "path1.gid",
86 [TOMOYO_PATH1_INO] = "path1.ino",
87 [TOMOYO_PATH1_MAJOR] = "path1.major",
88 [TOMOYO_PATH1_MINOR] = "path1.minor",
89 [TOMOYO_PATH1_PERM] = "path1.perm",
90 [TOMOYO_PATH1_TYPE] = "path1.type",
91 [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
92 [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
93 [TOMOYO_PATH2_UID] = "path2.uid",
94 [TOMOYO_PATH2_GID] = "path2.gid",
95 [TOMOYO_PATH2_INO] = "path2.ino",
96 [TOMOYO_PATH2_MAJOR] = "path2.major",
97 [TOMOYO_PATH2_MINOR] = "path2.minor",
98 [TOMOYO_PATH2_PERM] = "path2.perm",
99 [TOMOYO_PATH2_TYPE] = "path2.type",
100 [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
101 [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
102 [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
103 [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
104 [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
105 [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
106 [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
107 [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
108 [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
109 [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
Tetsuo Handa2066a362011-07-08 13:21:37 +0900110};
111
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900112/* String table for PREFERENCE keyword. */
113static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900114 [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900115 [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
116};
117
Tetsuo Handa2c47ab92011-06-26 23:21:19 +0900118/* String table for path operation. */
119const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
120 [TOMOYO_TYPE_EXECUTE] = "execute",
121 [TOMOYO_TYPE_READ] = "read",
122 [TOMOYO_TYPE_WRITE] = "write",
123 [TOMOYO_TYPE_APPEND] = "append",
124 [TOMOYO_TYPE_UNLINK] = "unlink",
125 [TOMOYO_TYPE_GETATTR] = "getattr",
126 [TOMOYO_TYPE_RMDIR] = "rmdir",
127 [TOMOYO_TYPE_TRUNCATE] = "truncate",
128 [TOMOYO_TYPE_SYMLINK] = "symlink",
129 [TOMOYO_TYPE_CHROOT] = "chroot",
130 [TOMOYO_TYPE_UMOUNT] = "unmount",
131};
132
133/* String table for categories. */
134static const char * const tomoyo_category_keywords
135[TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
136 [TOMOYO_MAC_CATEGORY_FILE] = "file",
137};
138
Kentaro Takeda95908372009-02-05 17:18:13 +0900139/* Permit policy management by non-root user? */
140static bool tomoyo_manage_by_non_root;
141
142/* Utility functions. */
143
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900144/**
Tetsuo Handa57c25902010-06-03 20:38:44 +0900145 * tomoyo_yesno - Return "yes" or "no".
146 *
147 * @value: Bool value.
148 */
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900149const char *tomoyo_yesno(const unsigned int value)
Tetsuo Handa57c25902010-06-03 20:38:44 +0900150{
151 return value ? "yes" : "no";
152}
153
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900154/**
155 * tomoyo_addprintf - strncat()-like-snprintf().
156 *
157 * @buffer: Buffer to write to. Must be '\0'-terminated.
158 * @len: Size of @buffer.
159 * @fmt: The printf()'s format string, followed by parameters.
160 *
161 * Returns nothing.
162 */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900163static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
164{
165 va_list args;
166 const int pos = strlen(buffer);
167 va_start(args, fmt);
168 vsnprintf(buffer + pos, len - pos - 1, fmt, args);
169 va_end(args);
170}
171
172/**
173 * tomoyo_flush - Flush queued string to userspace's buffer.
174 *
175 * @head: Pointer to "struct tomoyo_io_buffer".
176 *
177 * Returns true if all data was flushed, false otherwise.
178 */
179static bool tomoyo_flush(struct tomoyo_io_buffer *head)
180{
181 while (head->r.w_pos) {
182 const char *w = head->r.w[0];
Tetsuo Handa2c47ab92011-06-26 23:21:19 +0900183 size_t len = strlen(w);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900184 if (len) {
185 if (len > head->read_user_buf_avail)
186 len = head->read_user_buf_avail;
187 if (!len)
188 return false;
189 if (copy_to_user(head->read_user_buf, w, len))
190 return false;
191 head->read_user_buf_avail -= len;
192 head->read_user_buf += len;
193 w += len;
194 }
Tetsuo Handac0fa7972011-04-03 00:12:54 +0900195 head->r.w[0] = w;
196 if (*w)
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900197 return false;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900198 /* Add '\0' for audit logs and query. */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900199 if (head->poll) {
200 if (!head->read_user_buf_avail ||
201 copy_to_user(head->read_user_buf, "", 1))
202 return false;
203 head->read_user_buf_avail--;
204 head->read_user_buf++;
205 }
206 head->r.w_pos--;
207 for (len = 0; len < head->r.w_pos; len++)
208 head->r.w[len] = head->r.w[len + 1];
209 }
210 head->r.avail = 0;
211 return true;
212}
213
214/**
215 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
216 *
217 * @head: Pointer to "struct tomoyo_io_buffer".
218 * @string: String to print.
219 *
220 * Note that @string has to be kept valid until @head is kfree()d.
221 * This means that char[] allocated on stack memory cannot be passed to
222 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
223 */
224static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
225{
226 if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
227 head->r.w[head->r.w_pos++] = string;
228 tomoyo_flush(head);
229 } else
230 WARN_ON(1);
231}
232
233/**
234 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
235 *
236 * @head: Pointer to "struct tomoyo_io_buffer".
237 * @fmt: The printf()'s format string, followed by parameters.
238 */
239void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
240{
241 va_list args;
Tetsuo Handa2c47ab92011-06-26 23:21:19 +0900242 size_t len;
243 size_t pos = head->r.avail;
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900244 int size = head->readbuf_size - pos;
245 if (size <= 0)
246 return;
247 va_start(args, fmt);
248 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
249 va_end(args);
250 if (pos + len >= head->readbuf_size) {
251 WARN_ON(1);
252 return;
253 }
254 head->r.avail += len;
255 tomoyo_set_string(head, head->read_buf + pos);
256}
257
Tetsuo Handa0d2171d2011-06-26 23:17:46 +0900258/**
259 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
260 *
261 * @head: Pointer to "struct tomoyo_io_buffer".
262 *
263 * Returns nothing.
264 */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900265static void tomoyo_set_space(struct tomoyo_io_buffer *head)
266{
267 tomoyo_set_string(head, " ");
268}
269
Tetsuo Handa0d2171d2011-06-26 23:17:46 +0900270/**
271 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
272 *
273 * @head: Pointer to "struct tomoyo_io_buffer".
274 *
275 * Returns nothing.
276 */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900277static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
278{
279 tomoyo_set_string(head, "\n");
280 return !head->r.w_pos;
281}
282
Tetsuo Handa57c25902010-06-03 20:38:44 +0900283/**
Tetsuo Handa0d2171d2011-06-26 23:17:46 +0900284 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
285 *
286 * @head: Pointer to "struct tomoyo_io_buffer".
287 *
288 * Returns nothing.
289 */
290static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
291{
292 tomoyo_set_string(head, "/");
293}
294
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900295/* List of namespaces. */
296LIST_HEAD(tomoyo_namespace_list);
297/* True if namespace other than tomoyo_kernel_namespace is defined. */
298static bool tomoyo_namespace_enabled;
299
300/**
301 * tomoyo_init_policy_namespace - Initialize namespace.
302 *
303 * @ns: Pointer to "struct tomoyo_policy_namespace".
304 *
305 * Returns nothing.
306 */
307void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
308{
309 unsigned int idx;
310 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
311 INIT_LIST_HEAD(&ns->acl_group[idx]);
312 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
313 INIT_LIST_HEAD(&ns->group_list[idx]);
314 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
315 INIT_LIST_HEAD(&ns->policy_list[idx]);
316 ns->profile_version = 20100903;
317 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
318 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
319}
320
321/**
322 * tomoyo_print_namespace - Print namespace header.
323 *
324 * @head: Pointer to "struct tomoyo_io_buffer".
325 *
326 * Returns nothing.
327 */
328static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
329{
330 if (!tomoyo_namespace_enabled)
331 return;
332 tomoyo_set_string(head,
333 container_of(head->r.ns,
334 struct tomoyo_policy_namespace,
335 namespace_list)->name);
336 tomoyo_set_space(head);
337}
338
Tetsuo Handa0d2171d2011-06-26 23:17:46 +0900339/**
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900340 * tomoyo_print_name_union - Print a tomoyo_name_union.
341 *
342 * @head: Pointer to "struct tomoyo_io_buffer".
343 * @ptr: Pointer to "struct tomoyo_name_union".
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900344 */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900345static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
346 const struct tomoyo_name_union *ptr)
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900347{
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900348 tomoyo_set_space(head);
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +0900349 if (ptr->group) {
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900350 tomoyo_set_string(head, "@");
351 tomoyo_set_string(head, ptr->group->group_name->name);
352 } else {
353 tomoyo_set_string(head, ptr->filename->name);
354 }
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900355}
356
357/**
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +0900358 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
359 *
360 * @head: Pointer to "struct tomoyo_io_buffer".
361 * @ptr: Pointer to "struct tomoyo_name_union".
362 *
363 * Returns nothing.
364 */
365static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
366 const struct tomoyo_name_union *ptr)
367{
368 if (ptr->group) {
369 tomoyo_set_string(head, "@");
370 tomoyo_set_string(head, ptr->group->group_name->name);
371 } else {
372 tomoyo_set_string(head, "\"");
373 tomoyo_set_string(head, ptr->filename->name);
374 tomoyo_set_string(head, "\"");
375 }
376}
377
378/**
Tetsuo Handa2066a362011-07-08 13:21:37 +0900379 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900380 *
Tetsuo Handa2066a362011-07-08 13:21:37 +0900381 * @head: Pointer to "struct tomoyo_io_buffer".
382 * @ptr: Pointer to "struct tomoyo_number_union".
383 *
384 * Returns nothing.
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900385 */
Tetsuo Handa2066a362011-07-08 13:21:37 +0900386static void tomoyo_print_number_union_nospace
387(struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900388{
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +0900389 if (ptr->group) {
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900390 tomoyo_set_string(head, "@");
391 tomoyo_set_string(head, ptr->group->group_name->name);
392 } else {
393 int i;
394 unsigned long min = ptr->values[0];
395 const unsigned long max = ptr->values[1];
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +0900396 u8 min_type = ptr->value_type[0];
397 const u8 max_type = ptr->value_type[1];
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900398 char buffer[128];
399 buffer[0] = '\0';
400 for (i = 0; i < 2; i++) {
401 switch (min_type) {
402 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
403 tomoyo_addprintf(buffer, sizeof(buffer),
404 "0x%lX", min);
405 break;
406 case TOMOYO_VALUE_TYPE_OCTAL:
407 tomoyo_addprintf(buffer, sizeof(buffer),
408 "0%lo", min);
409 break;
410 default:
Tetsuo Handa2066a362011-07-08 13:21:37 +0900411 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
412 min);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900413 break;
414 }
415 if (min == max && min_type == max_type)
416 break;
417 tomoyo_addprintf(buffer, sizeof(buffer), "-");
418 min_type = max_type;
419 min = max;
420 }
421 tomoyo_io_printf(head, "%s", buffer);
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900422 }
Kentaro Takeda95908372009-02-05 17:18:13 +0900423}
424
425/**
Tetsuo Handa2066a362011-07-08 13:21:37 +0900426 * tomoyo_print_number_union - Print a tomoyo_number_union.
427 *
428 * @head: Pointer to "struct tomoyo_io_buffer".
429 * @ptr: Pointer to "struct tomoyo_number_union".
430 *
431 * Returns nothing.
432 */
433static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
434 const struct tomoyo_number_union *ptr)
435{
436 tomoyo_set_space(head);
437 tomoyo_print_number_union_nospace(head, ptr);
438}
439
440/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900441 * tomoyo_assign_profile - Create a new profile.
Kentaro Takeda95908372009-02-05 17:18:13 +0900442 *
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900443 * @ns: Pointer to "struct tomoyo_policy_namespace".
Kentaro Takeda95908372009-02-05 17:18:13 +0900444 * @profile: Profile number to create.
445 *
446 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
447 */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900448static struct tomoyo_profile *tomoyo_assign_profile
449(struct tomoyo_policy_namespace *ns, const unsigned int profile)
Kentaro Takeda95908372009-02-05 17:18:13 +0900450{
Tetsuo Handa57c25902010-06-03 20:38:44 +0900451 struct tomoyo_profile *ptr;
452 struct tomoyo_profile *entry;
Kentaro Takeda95908372009-02-05 17:18:13 +0900453 if (profile >= TOMOYO_MAX_PROFILES)
454 return NULL;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900455 ptr = ns->profile_ptr[profile];
Kentaro Takeda95908372009-02-05 17:18:13 +0900456 if (ptr)
Tetsuo Handa57c25902010-06-03 20:38:44 +0900457 return ptr;
458 entry = kzalloc(sizeof(*entry), GFP_NOFS);
459 if (mutex_lock_interruptible(&tomoyo_policy_lock))
460 goto out;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900461 ptr = ns->profile_ptr[profile];
Tetsuo Handa57c25902010-06-03 20:38:44 +0900462 if (!ptr && tomoyo_memory_ok(entry)) {
463 ptr = entry;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900464 ptr->default_config = TOMOYO_CONFIG_DISABLED |
465 TOMOYO_CONFIG_WANT_GRANT_LOG |
466 TOMOYO_CONFIG_WANT_REJECT_LOG;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900467 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
468 sizeof(ptr->config));
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900469 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024;
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900470 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900471 mb(); /* Avoid out-of-order execution. */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900472 ns->profile_ptr[profile] = ptr;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900473 entry = NULL;
Tetsuo Handacd7bec62010-01-05 06:39:37 +0900474 }
Tetsuo Handa29282382010-05-06 00:18:15 +0900475 mutex_unlock(&tomoyo_policy_lock);
Tetsuo Handa57c25902010-06-03 20:38:44 +0900476 out:
477 kfree(entry);
Kentaro Takeda95908372009-02-05 17:18:13 +0900478 return ptr;
479}
480
481/**
Tetsuo Handa57c25902010-06-03 20:38:44 +0900482 * tomoyo_profile - Find a profile.
483 *
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900484 * @ns: Pointer to "struct tomoyo_policy_namespace".
Tetsuo Handa57c25902010-06-03 20:38:44 +0900485 * @profile: Profile number to find.
486 *
487 * Returns pointer to "struct tomoyo_profile".
488 */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900489struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
490 const u8 profile)
Tetsuo Handa57c25902010-06-03 20:38:44 +0900491{
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900492 static struct tomoyo_profile tomoyo_null_profile;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900493 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900494 if (!ptr)
495 ptr = &tomoyo_null_profile;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900496 return ptr;
497}
498
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900499/**
500 * tomoyo_find_yesno - Find values for specified keyword.
501 *
502 * @string: String to check.
503 * @find: Name of keyword.
504 *
505 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
506 */
Tetsuo Handa8e568682010-06-25 09:30:09 +0900507static s8 tomoyo_find_yesno(const char *string, const char *find)
508{
509 const char *cp = strstr(string, find);
510 if (cp) {
511 cp += strlen(find);
512 if (!strncmp(cp, "=yes", 4))
513 return 1;
514 else if (!strncmp(cp, "=no", 3))
515 return 0;
516 }
517 return -1;
518}
519
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900520/**
521 * tomoyo_set_uint - Set value for specified preference.
522 *
523 * @i: Pointer to "unsigned int".
524 * @string: String to check.
525 * @find: Name of keyword.
526 *
527 * Returns nothing.
528 */
Tetsuo Handa8e568682010-06-25 09:30:09 +0900529static void tomoyo_set_uint(unsigned int *i, const char *string,
530 const char *find)
531{
532 const char *cp = strstr(string, find);
533 if (cp)
534 sscanf(cp + strlen(find), "=%u", i);
535}
536
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900537/**
538 * tomoyo_set_mode - Set mode for specified profile.
539 *
540 * @name: Name of functionality.
541 * @value: Mode for @name.
542 * @profile: Pointer to "struct tomoyo_profile".
543 *
544 * Returns 0 on success, negative value otherwise.
545 */
Tetsuo Handa8e568682010-06-25 09:30:09 +0900546static int tomoyo_set_mode(char *name, const char *value,
Tetsuo Handa8e568682010-06-25 09:30:09 +0900547 struct tomoyo_profile *profile)
548{
549 u8 i;
550 u8 config;
551 if (!strcmp(name, "CONFIG")) {
552 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
553 config = profile->default_config;
554 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
555 config = 0;
556 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
557 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
Tetsuo Handa2c47ab92011-06-26 23:21:19 +0900558 int len = 0;
559 if (i < TOMOYO_MAX_MAC_INDEX) {
560 const u8 c = tomoyo_index2category[i];
561 const char *category =
562 tomoyo_category_keywords[c];
563 len = strlen(category);
564 if (strncmp(name, category, len) ||
565 name[len++] != ':' || name[len++] != ':')
566 continue;
567 }
568 if (strcmp(name + len, tomoyo_mac_keywords[i]))
Tetsuo Handa8e568682010-06-25 09:30:09 +0900569 continue;
570 config = profile->config[i];
571 break;
572 }
573 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
574 return -EINVAL;
575 } else {
576 return -EINVAL;
577 }
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900578 if (strstr(value, "use_default")) {
Tetsuo Handa8e568682010-06-25 09:30:09 +0900579 config = TOMOYO_CONFIG_USE_DEFAULT;
580 } else {
581 u8 mode;
582 for (mode = 0; mode < 4; mode++)
583 if (strstr(value, tomoyo_mode[mode]))
584 /*
585 * Update lower 3 bits in order to distinguish
586 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
587 */
588 config = (config & ~7) | mode;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900589 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
590 switch (tomoyo_find_yesno(value, "grant_log")) {
591 case 1:
592 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
593 break;
594 case 0:
595 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
596 break;
597 }
598 switch (tomoyo_find_yesno(value, "reject_log")) {
599 case 1:
600 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
601 break;
602 case 0:
603 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
604 break;
605 }
606 }
Tetsuo Handa8e568682010-06-25 09:30:09 +0900607 }
608 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
609 profile->config[i] = config;
610 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
611 profile->default_config = config;
612 return 0;
613}
614
Tetsuo Handa57c25902010-06-03 20:38:44 +0900615/**
616 * tomoyo_write_profile - Write profile table.
Kentaro Takeda95908372009-02-05 17:18:13 +0900617 *
618 * @head: Pointer to "struct tomoyo_io_buffer".
619 *
620 * Returns 0 on success, negative value otherwise.
621 */
622static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
623{
624 char *data = head->write_buf;
625 unsigned int i;
Kentaro Takeda95908372009-02-05 17:18:13 +0900626 char *cp;
627 struct tomoyo_profile *profile;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900628 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
629 == 1)
Tetsuo Handa57c25902010-06-03 20:38:44 +0900630 return 0;
631 i = simple_strtoul(data, &cp, 10);
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900632 if (*cp != '-')
633 return -EINVAL;
634 data = cp + 1;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900635 profile = tomoyo_assign_profile(head->w.ns, i);
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900636 if (!profile)
637 return -EINVAL;
Kentaro Takeda95908372009-02-05 17:18:13 +0900638 cp = strchr(data, '=');
639 if (!cp)
640 return -EINVAL;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900641 *cp++ = '\0';
Kentaro Takeda95908372009-02-05 17:18:13 +0900642 if (!strcmp(data, "COMMENT")) {
Tetsuo Handa2a086e52011-04-03 00:09:26 +0900643 static DEFINE_SPINLOCK(lock);
644 const struct tomoyo_path_info *new_comment
645 = tomoyo_get_name(cp);
646 const struct tomoyo_path_info *old_comment;
647 if (!new_comment)
648 return -ENOMEM;
649 spin_lock(&lock);
650 old_comment = profile->comment;
651 profile->comment = new_comment;
652 spin_unlock(&lock);
Tetsuo Handabf24fb02010-02-11 09:41:58 +0900653 tomoyo_put_name(old_comment);
Kentaro Takeda95908372009-02-05 17:18:13 +0900654 return 0;
655 }
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900656 if (!strcmp(data, "PREFERENCE")) {
657 for (i = 0; i < TOMOYO_MAX_PREF; i++)
658 tomoyo_set_uint(&profile->pref[i], cp,
659 tomoyo_pref_keywords[i]);
660 return 0;
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900661 }
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900662 return tomoyo_set_mode(data, cp, profile);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900663}
664
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900665/**
666 * tomoyo_print_config - Print mode for specified functionality.
667 *
668 * @head: Pointer to "struct tomoyo_io_buffer".
669 * @config: Mode for that functionality.
670 *
671 * Returns nothing.
672 *
673 * Caller prints functionality's name.
674 */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900675static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
676{
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900677 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
678 tomoyo_mode[config & 3],
679 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
680 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900681}
682
Kentaro Takeda95908372009-02-05 17:18:13 +0900683/**
Tetsuo Handa57c25902010-06-03 20:38:44 +0900684 * tomoyo_read_profile - Read profile table.
Kentaro Takeda95908372009-02-05 17:18:13 +0900685 *
686 * @head: Pointer to "struct tomoyo_io_buffer".
Tetsuo Handaeadd99c2011-06-26 23:18:58 +0900687 *
688 * Returns nothing.
Kentaro Takeda95908372009-02-05 17:18:13 +0900689 */
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +0900690static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +0900691{
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900692 u8 index;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900693 struct tomoyo_policy_namespace *ns =
694 container_of(head->r.ns, typeof(*ns), namespace_list);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900695 const struct tomoyo_profile *profile;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900696 if (head->r.eof)
697 return;
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900698 next:
699 index = head->r.index;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900700 profile = ns->profile_ptr[index];
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900701 switch (head->r.step) {
702 case 0:
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900703 tomoyo_print_namespace(head);
704 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
705 ns->profile_version);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900706 head->r.step++;
707 break;
708 case 1:
709 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
710 head->r.index++)
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900711 if (ns->profile_ptr[head->r.index])
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900712 break;
713 if (head->r.index == TOMOYO_MAX_PROFILES)
714 return;
715 head->r.step++;
716 break;
717 case 2:
718 {
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900719 u8 i;
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900720 const struct tomoyo_path_info *comment =
721 profile->comment;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900722 tomoyo_print_namespace(head);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900723 tomoyo_io_printf(head, "%u-COMMENT=", index);
724 tomoyo_set_string(head, comment ? comment->name : "");
725 tomoyo_set_lf(head);
Tetsuo Handad5ca1722011-06-26 23:18:21 +0900726 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
727 for (i = 0; i < TOMOYO_MAX_PREF; i++)
728 tomoyo_io_printf(head, "%s=%u ",
729 tomoyo_pref_keywords[i],
730 profile->pref[i]);
731 tomoyo_set_string(head, "}\n");
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900732 head->r.step++;
733 }
734 break;
735 case 3:
736 {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900737 tomoyo_print_namespace(head);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900738 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
739 tomoyo_print_config(head, profile->default_config);
740 head->r.bit = 0;
741 head->r.step++;
742 }
743 break;
744 case 4:
745 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
746 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
747 const u8 i = head->r.bit;
748 const u8 config = profile->config[i];
Tetsuo Handa57c25902010-06-03 20:38:44 +0900749 if (config == TOMOYO_CONFIG_USE_DEFAULT)
750 continue;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900751 tomoyo_print_namespace(head);
Tetsuo Handa2c47ab92011-06-26 23:21:19 +0900752 if (i < TOMOYO_MAX_MAC_INDEX)
753 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
754 index,
755 tomoyo_category_keywords
756 [tomoyo_index2category[i]],
757 tomoyo_mac_keywords[i]);
758 else
759 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
760 tomoyo_mac_keywords[i]);
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900761 tomoyo_print_config(head, config);
762 head->r.bit++;
763 break;
Kentaro Takeda95908372009-02-05 17:18:13 +0900764 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900765 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
766 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900767 head->r.index++;
768 head->r.step = 1;
769 }
Tetsuo Handa57c25902010-06-03 20:38:44 +0900770 break;
Kentaro Takeda95908372009-02-05 17:18:13 +0900771 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900772 if (tomoyo_flush(head))
773 goto next;
Kentaro Takeda95908372009-02-05 17:18:13 +0900774}
775
Tetsuo Handa0f2a55d2011-07-14 14:46:51 +0900776/**
777 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
778 *
779 * @a: Pointer to "struct tomoyo_acl_head".
780 * @b: Pointer to "struct tomoyo_acl_head".
781 *
782 * Returns true if @a == @b, false otherwise.
783 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900784static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
785 const struct tomoyo_acl_head *b)
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900786{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900787 return container_of(a, struct tomoyo_manager, head)->manager ==
788 container_of(b, struct tomoyo_manager, head)->manager;
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900789}
790
Kentaro Takeda95908372009-02-05 17:18:13 +0900791/**
792 * tomoyo_update_manager_entry - Add a manager entry.
793 *
794 * @manager: The path to manager or the domainnamme.
795 * @is_delete: True if it is a delete request.
796 *
797 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900798 *
799 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +0900800 */
801static int tomoyo_update_manager_entry(const char *manager,
802 const bool is_delete)
803{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900804 struct tomoyo_manager e = { };
Tetsuo Handaa238cf52011-06-26 23:17:10 +0900805 struct tomoyo_acl_param param = {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900806 /* .ns = &tomoyo_kernel_namespace, */
Tetsuo Handaa238cf52011-06-26 23:17:10 +0900807 .is_delete = is_delete,
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900808 .list = &tomoyo_kernel_namespace.
809 policy_list[TOMOYO_ID_MANAGER],
Tetsuo Handaa238cf52011-06-26 23:17:10 +0900810 };
811 int error = is_delete ? -ENOENT : -ENOMEM;
Tetsuo Handa75093152010-06-16 16:23:55 +0900812 if (tomoyo_domain_def(manager)) {
813 if (!tomoyo_correct_domain(manager))
Kentaro Takeda95908372009-02-05 17:18:13 +0900814 return -EINVAL;
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900815 e.is_domain = true;
Kentaro Takeda95908372009-02-05 17:18:13 +0900816 } else {
Tetsuo Handa75093152010-06-16 16:23:55 +0900817 if (!tomoyo_correct_path(manager))
Kentaro Takeda95908372009-02-05 17:18:13 +0900818 return -EINVAL;
819 }
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900820 e.manager = tomoyo_get_name(manager);
Tetsuo Handaa238cf52011-06-26 23:17:10 +0900821 if (e.manager) {
822 error = tomoyo_update_policy(&e.head, sizeof(e), &param,
823 tomoyo_same_manager);
824 tomoyo_put_name(e.manager);
825 }
Kentaro Takeda95908372009-02-05 17:18:13 +0900826 return error;
827}
828
829/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900830 * tomoyo_write_manager - Write manager policy.
Kentaro Takeda95908372009-02-05 17:18:13 +0900831 *
832 * @head: Pointer to "struct tomoyo_io_buffer".
833 *
834 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900835 *
836 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +0900837 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900838static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +0900839{
840 char *data = head->write_buf;
Kentaro Takeda95908372009-02-05 17:18:13 +0900841
842 if (!strcmp(data, "manage_by_non_root")) {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900843 tomoyo_manage_by_non_root = !head->w.is_delete;
Kentaro Takeda95908372009-02-05 17:18:13 +0900844 return 0;
845 }
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900846 return tomoyo_update_manager_entry(data, head->w.is_delete);
Kentaro Takeda95908372009-02-05 17:18:13 +0900847}
848
849/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900850 * tomoyo_read_manager - Read manager policy.
Kentaro Takeda95908372009-02-05 17:18:13 +0900851 *
852 * @head: Pointer to "struct tomoyo_io_buffer".
853 *
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900854 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +0900855 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900856static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +0900857{
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900858 if (head->r.eof)
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +0900859 return;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900860 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.
861 policy_list[TOMOYO_ID_MANAGER]) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900862 struct tomoyo_manager *ptr =
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900863 list_entry(head->r.acl, typeof(*ptr), head.list);
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900864 if (ptr->head.is_deleted)
Kentaro Takeda95908372009-02-05 17:18:13 +0900865 continue;
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900866 if (!tomoyo_flush(head))
867 return;
868 tomoyo_set_string(head, ptr->manager->name);
869 tomoyo_set_lf(head);
Kentaro Takeda95908372009-02-05 17:18:13 +0900870 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900871 head->r.eof = true;
Kentaro Takeda95908372009-02-05 17:18:13 +0900872}
873
874/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900875 * tomoyo_manager - Check whether the current process is a policy manager.
Kentaro Takeda95908372009-02-05 17:18:13 +0900876 *
877 * Returns true if the current process is permitted to modify policy
878 * via /sys/kernel/security/tomoyo/ interface.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900879 *
880 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +0900881 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900882static bool tomoyo_manager(void)
Kentaro Takeda95908372009-02-05 17:18:13 +0900883{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900884 struct tomoyo_manager *ptr;
Kentaro Takeda95908372009-02-05 17:18:13 +0900885 const char *exe;
886 const struct task_struct *task = current;
887 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
888 bool found = false;
889
890 if (!tomoyo_policy_loaded)
891 return true;
892 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
893 return false;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900894 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
895 policy_list[TOMOYO_ID_MANAGER], head.list) {
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900896 if (!ptr->head.is_deleted && ptr->is_domain
Kentaro Takeda95908372009-02-05 17:18:13 +0900897 && !tomoyo_pathcmp(domainname, ptr->manager)) {
898 found = true;
899 break;
900 }
901 }
Kentaro Takeda95908372009-02-05 17:18:13 +0900902 if (found)
903 return true;
904 exe = tomoyo_get_exe();
905 if (!exe)
906 return false;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900907 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
908 policy_list[TOMOYO_ID_MANAGER], head.list) {
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900909 if (!ptr->head.is_deleted && !ptr->is_domain
Kentaro Takeda95908372009-02-05 17:18:13 +0900910 && !strcmp(exe, ptr->manager->name)) {
911 found = true;
912 break;
913 }
914 }
Kentaro Takeda95908372009-02-05 17:18:13 +0900915 if (!found) { /* Reduce error messages. */
916 static pid_t last_pid;
917 const pid_t pid = current->pid;
918 if (last_pid != pid) {
919 printk(KERN_WARNING "%s ( %s ) is not permitted to "
920 "update policies.\n", domainname->name, exe);
921 last_pid = pid;
922 }
923 }
Tetsuo Handa8e2d39a2010-01-26 20:45:27 +0900924 kfree(exe);
Kentaro Takeda95908372009-02-05 17:18:13 +0900925 return found;
926}
927
928/**
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900929 * tomoyo_select_domain - Parse select command.
Kentaro Takeda95908372009-02-05 17:18:13 +0900930 *
931 * @head: Pointer to "struct tomoyo_io_buffer".
932 * @data: String to parse.
933 *
934 * Returns true on success, false otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900935 *
936 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +0900937 */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900938static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
939 const char *data)
Kentaro Takeda95908372009-02-05 17:18:13 +0900940{
941 unsigned int pid;
942 struct tomoyo_domain_info *domain = NULL;
Tetsuo Handa9b244372010-06-03 20:35:53 +0900943 bool global_pid = false;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +0900944 if (strncmp(data, "select ", 7))
945 return false;
946 data += 7;
Tetsuo Handa9b244372010-06-03 20:35:53 +0900947 if (sscanf(data, "pid=%u", &pid) == 1 ||
948 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
Kentaro Takeda95908372009-02-05 17:18:13 +0900949 struct task_struct *p;
Tetsuo Handa1fcdc7c2010-02-25 17:19:25 +0900950 rcu_read_lock();
Kentaro Takeda95908372009-02-05 17:18:13 +0900951 read_lock(&tasklist_lock);
Tetsuo Handa9b244372010-06-03 20:35:53 +0900952 if (global_pid)
953 p = find_task_by_pid_ns(pid, &init_pid_ns);
954 else
955 p = find_task_by_vpid(pid);
Kentaro Takeda95908372009-02-05 17:18:13 +0900956 if (p)
957 domain = tomoyo_real_domain(p);
958 read_unlock(&tasklist_lock);
Tetsuo Handa1fcdc7c2010-02-25 17:19:25 +0900959 rcu_read_unlock();
Kentaro Takeda95908372009-02-05 17:18:13 +0900960 } else if (!strncmp(data, "domain=", 7)) {
Tetsuo Handa75093152010-06-16 16:23:55 +0900961 if (tomoyo_domain_def(data + 7))
Kentaro Takeda95908372009-02-05 17:18:13 +0900962 domain = tomoyo_find_domain(data + 7);
Kentaro Takeda95908372009-02-05 17:18:13 +0900963 } else
964 return false;
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +0900965 head->w.domain = domain;
Kentaro Takeda95908372009-02-05 17:18:13 +0900966 /* Accessing read_buf is safe because head->io_sem is held. */
967 if (!head->read_buf)
968 return true; /* Do nothing if open(O_WRONLY). */
Tetsuo Handaf23571e2010-06-24 14:57:16 +0900969 memset(&head->r, 0, sizeof(head->r));
970 head->r.print_this_domain_only = true;
Dan Carpenter68eda8f2010-08-08 00:17:51 +0200971 if (domain)
972 head->r.domain = &domain->list;
973 else
974 head->r.eof = 1;
Kentaro Takeda95908372009-02-05 17:18:13 +0900975 tomoyo_io_printf(head, "# select %s\n", data);
Tetsuo Handa475e6fa2010-06-24 11:28:14 +0900976 if (domain && domain->is_deleted)
977 tomoyo_io_printf(head, "# This is a deleted domain.\n");
Kentaro Takeda95908372009-02-05 17:18:13 +0900978 return true;
979}
980
981/**
Tetsuo Handaccf135f2009-06-19 10:29:34 +0900982 * tomoyo_delete_domain - Delete a domain.
983 *
984 * @domainname: The name of domain.
985 *
986 * Returns 0.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900987 *
988 * Caller holds tomoyo_read_lock().
Tetsuo Handaccf135f2009-06-19 10:29:34 +0900989 */
990static int tomoyo_delete_domain(char *domainname)
991{
992 struct tomoyo_domain_info *domain;
993 struct tomoyo_path_info name;
994
995 name.name = domainname;
996 tomoyo_fill_path_info(&name);
Tetsuo Handa29282382010-05-06 00:18:15 +0900997 if (mutex_lock_interruptible(&tomoyo_policy_lock))
998 return 0;
Tetsuo Handaccf135f2009-06-19 10:29:34 +0900999 /* Is there an active domain? */
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001000 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
Tetsuo Handaccf135f2009-06-19 10:29:34 +09001001 /* Never delete tomoyo_kernel_domain */
1002 if (domain == &tomoyo_kernel_domain)
1003 continue;
1004 if (domain->is_deleted ||
1005 tomoyo_pathcmp(domain->domainname, &name))
1006 continue;
1007 domain->is_deleted = true;
1008 break;
1009 }
Tetsuo Handaf737d952010-01-03 21:16:32 +09001010 mutex_unlock(&tomoyo_policy_lock);
Tetsuo Handaccf135f2009-06-19 10:29:34 +09001011 return 0;
1012}
1013
1014/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001015 * tomoyo_write_domain2 - Write domain policy.
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001016 *
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001017 * @ns: Pointer to "struct tomoyo_policy_namespace".
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001018 * @list: Pointer to "struct list_head".
1019 * @data: Policy to be interpreted.
1020 * @is_delete: True if it is a delete request.
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001021 *
1022 * Returns 0 on success, negative value otherwise.
1023 *
1024 * Caller holds tomoyo_read_lock().
1025 */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001026static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1027 struct list_head *list, char *data,
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001028 const bool is_delete)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001029{
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001030 struct tomoyo_acl_param param = {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001031 .ns = ns,
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001032 .list = list,
1033 .data = data,
1034 .is_delete = is_delete,
1035 };
1036 static const struct {
1037 const char *keyword;
1038 int (*write) (struct tomoyo_acl_param *);
1039 } tomoyo_callback[1] = {
1040 { "file ", tomoyo_write_file },
1041 };
1042 u8 i;
1043 for (i = 0; i < 1; i++) {
1044 if (!tomoyo_str_starts(&param.data,
1045 tomoyo_callback[i].keyword))
1046 continue;
1047 return tomoyo_callback[i].write(&param);
1048 }
1049 return -EINVAL;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001050}
1051
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09001052/* String table for domain flags. */
1053const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1054 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1055 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1056};
1057
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001058/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001059 * tomoyo_write_domain - Write domain policy.
Kentaro Takeda95908372009-02-05 17:18:13 +09001060 *
1061 * @head: Pointer to "struct tomoyo_io_buffer".
1062 *
1063 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001064 *
1065 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +09001066 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001067static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09001068{
1069 char *data = head->write_buf;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001070 struct tomoyo_policy_namespace *ns;
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09001071 struct tomoyo_domain_info *domain = head->w.domain;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001072 const bool is_delete = head->w.is_delete;
1073 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
Kentaro Takeda95908372009-02-05 17:18:13 +09001074 unsigned int profile;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001075 if (*data == '<') {
Kentaro Takeda95908372009-02-05 17:18:13 +09001076 domain = NULL;
1077 if (is_delete)
1078 tomoyo_delete_domain(data);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001079 else if (is_select)
Kentaro Takeda95908372009-02-05 17:18:13 +09001080 domain = tomoyo_find_domain(data);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001081 else
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001082 domain = tomoyo_assign_domain(data, false);
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09001083 head->w.domain = domain;
Kentaro Takeda95908372009-02-05 17:18:13 +09001084 return 0;
1085 }
1086 if (!domain)
1087 return -EINVAL;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001088 ns = domain->ns;
Tetsuo Handab5bc60b2011-06-26 23:16:03 +09001089 if (sscanf(data, "use_profile %u", &profile) == 1
Kentaro Takeda95908372009-02-05 17:18:13 +09001090 && profile < TOMOYO_MAX_PROFILES) {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001091 if (!tomoyo_policy_loaded || ns->profile_ptr[profile])
Kentaro Takeda95908372009-02-05 17:18:13 +09001092 domain->profile = (u8) profile;
1093 return 0;
1094 }
Tetsuo Handa32997142011-06-26 23:19:28 +09001095 if (sscanf(data, "use_group %u\n", &profile) == 1
1096 && profile < TOMOYO_MAX_ACL_GROUPS) {
1097 if (!is_delete)
1098 domain->group = (u8) profile;
1099 return 0;
1100 }
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09001101 for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) {
1102 const char *cp = tomoyo_dif[profile];
1103 if (strncmp(data, cp, strlen(cp) - 1))
1104 continue;
1105 domain->flags[profile] = !is_delete;
Tetsuo Handa9b244372010-06-03 20:35:53 +09001106 return 0;
1107 }
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001108 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1109 is_delete);
Kentaro Takeda95908372009-02-05 17:18:13 +09001110}
1111
1112/**
Tetsuo Handa2066a362011-07-08 13:21:37 +09001113 * tomoyo_print_condition - Print condition part.
1114 *
1115 * @head: Pointer to "struct tomoyo_io_buffer".
1116 * @cond: Pointer to "struct tomoyo_condition".
1117 *
1118 * Returns true on success, false otherwise.
1119 */
1120static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1121 const struct tomoyo_condition *cond)
1122{
1123 switch (head->r.cond_step) {
1124 case 0:
1125 head->r.cond_index = 0;
1126 head->r.cond_step++;
1127 /* fall through */
1128 case 1:
1129 {
1130 const u16 condc = cond->condc;
1131 const struct tomoyo_condition_element *condp =
1132 (typeof(condp)) (cond + 1);
1133 const struct tomoyo_number_union *numbers_p =
1134 (typeof(numbers_p)) (condp + condc);
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001135 const struct tomoyo_name_union *names_p =
1136 (typeof(names_p))
1137 (numbers_p + cond->numbers_count);
Tetsuo Handa5b636852011-07-08 13:24:54 +09001138 const struct tomoyo_argv *argv =
1139 (typeof(argv)) (names_p + cond->names_count);
1140 const struct tomoyo_envp *envp =
1141 (typeof(envp)) (argv + cond->argc);
Tetsuo Handa2066a362011-07-08 13:21:37 +09001142 u16 skip;
1143 for (skip = 0; skip < head->r.cond_index; skip++) {
1144 const u8 left = condp->left;
1145 const u8 right = condp->right;
1146 condp++;
1147 switch (left) {
Tetsuo Handa5b636852011-07-08 13:24:54 +09001148 case TOMOYO_ARGV_ENTRY:
1149 argv++;
1150 continue;
1151 case TOMOYO_ENVP_ENTRY:
1152 envp++;
1153 continue;
Tetsuo Handa2066a362011-07-08 13:21:37 +09001154 case TOMOYO_NUMBER_UNION:
1155 numbers_p++;
1156 break;
1157 }
1158 switch (right) {
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001159 case TOMOYO_NAME_UNION:
1160 names_p++;
1161 break;
Tetsuo Handa2066a362011-07-08 13:21:37 +09001162 case TOMOYO_NUMBER_UNION:
1163 numbers_p++;
1164 break;
1165 }
1166 }
1167 while (head->r.cond_index < condc) {
1168 const u8 match = condp->equals;
1169 const u8 left = condp->left;
1170 const u8 right = condp->right;
1171 if (!tomoyo_flush(head))
1172 return false;
1173 condp++;
1174 head->r.cond_index++;
1175 tomoyo_set_space(head);
1176 switch (left) {
Tetsuo Handa5b636852011-07-08 13:24:54 +09001177 case TOMOYO_ARGV_ENTRY:
1178 tomoyo_io_printf(head,
1179 "exec.argv[%lu]%s=\"",
1180 argv->index, argv->
1181 is_not ? "!" : "");
1182 tomoyo_set_string(head,
1183 argv->value->name);
1184 tomoyo_set_string(head, "\"");
1185 argv++;
1186 continue;
1187 case TOMOYO_ENVP_ENTRY:
1188 tomoyo_set_string(head,
1189 "exec.envp[\"");
1190 tomoyo_set_string(head,
1191 envp->name->name);
1192 tomoyo_io_printf(head, "\"]%s=", envp->
1193 is_not ? "!" : "");
1194 if (envp->value) {
1195 tomoyo_set_string(head, "\"");
1196 tomoyo_set_string(head, envp->
1197 value->name);
1198 tomoyo_set_string(head, "\"");
1199 } else {
1200 tomoyo_set_string(head,
1201 "NULL");
1202 }
1203 envp++;
1204 continue;
Tetsuo Handa2066a362011-07-08 13:21:37 +09001205 case TOMOYO_NUMBER_UNION:
1206 tomoyo_print_number_union_nospace
1207 (head, numbers_p++);
1208 break;
1209 default:
1210 tomoyo_set_string(head,
1211 tomoyo_condition_keyword[left]);
1212 break;
1213 }
1214 tomoyo_set_string(head, match ? "=" : "!=");
1215 switch (right) {
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001216 case TOMOYO_NAME_UNION:
1217 tomoyo_print_name_union_quoted
1218 (head, names_p++);
1219 break;
Tetsuo Handa2066a362011-07-08 13:21:37 +09001220 case TOMOYO_NUMBER_UNION:
1221 tomoyo_print_number_union_nospace
1222 (head, numbers_p++);
1223 break;
1224 default:
1225 tomoyo_set_string(head,
1226 tomoyo_condition_keyword[right]);
1227 break;
1228 }
1229 }
1230 }
1231 head->r.cond_step++;
1232 /* fall through */
1233 case 2:
1234 if (!tomoyo_flush(head))
1235 break;
1236 head->r.cond_step++;
1237 /* fall through */
1238 case 3:
1239 tomoyo_set_lf(head);
1240 return true;
1241 }
1242 return false;
1243}
1244
1245/**
Tetsuo Handa32997142011-06-26 23:19:28 +09001246 * tomoyo_set_group - Print "acl_group " header keyword and category name.
Kentaro Takeda95908372009-02-05 17:18:13 +09001247 *
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001248 * @head: Pointer to "struct tomoyo_io_buffer".
1249 * @category: Category name.
Kentaro Takeda95908372009-02-05 17:18:13 +09001250 *
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001251 * Returns nothing.
Kentaro Takeda95908372009-02-05 17:18:13 +09001252 */
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001253static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1254 const char *category)
Kentaro Takeda95908372009-02-05 17:18:13 +09001255{
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001256 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1257 tomoyo_print_namespace(head);
Tetsuo Handa32997142011-06-26 23:19:28 +09001258 tomoyo_io_printf(head, "acl_group %u ",
1259 head->r.acl_group_index);
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001260 }
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001261 tomoyo_set_string(head, category);
Tetsuo Handa2106ccd2010-05-17 10:10:31 +09001262}
1263
1264/**
Kentaro Takeda95908372009-02-05 17:18:13 +09001265 * tomoyo_print_entry - Print an ACL entry.
1266 *
1267 * @head: Pointer to "struct tomoyo_io_buffer".
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001268 * @acl: Pointer to an ACL entry.
Kentaro Takeda95908372009-02-05 17:18:13 +09001269 *
1270 * Returns true on success, false otherwise.
1271 */
1272static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001273 struct tomoyo_acl_info *acl)
Kentaro Takeda95908372009-02-05 17:18:13 +09001274{
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001275 const u8 acl_type = acl->type;
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001276 bool first = true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001277 u8 bit;
Kentaro Takeda95908372009-02-05 17:18:13 +09001278
Tetsuo Handa2066a362011-07-08 13:21:37 +09001279 if (head->r.print_cond_part)
1280 goto print_cond_part;
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001281 if (acl->is_deleted)
Tetsuo Handa237ab452010-06-12 20:46:22 +09001282 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001283 if (!tomoyo_flush(head))
1284 return false;
1285 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001286 struct tomoyo_path_acl *ptr =
1287 container_of(acl, typeof(*ptr), head);
1288 const u16 perm = ptr->perm;
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001289 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001290 if (!(perm & (1 << bit)))
1291 continue;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001292 if (head->r.print_transition_related_only &&
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001293 bit != TOMOYO_TYPE_EXECUTE)
1294 continue;
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001295 if (first) {
1296 tomoyo_set_group(head, "file ");
1297 first = false;
1298 } else {
1299 tomoyo_set_slash(head);
1300 }
1301 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001302 }
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001303 if (first)
1304 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001305 tomoyo_print_name_union(head, &ptr->name);
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001306 } else if (head->r.print_transition_related_only) {
Tetsuo Handa063821c2010-06-24 12:00:25 +09001307 return true;
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001308 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1309 struct tomoyo_path2_acl *ptr =
1310 container_of(acl, typeof(*ptr), head);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001311 const u8 perm = ptr->perm;
1312 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1313 if (!(perm & (1 << bit)))
1314 continue;
1315 if (first) {
1316 tomoyo_set_group(head, "file ");
1317 first = false;
1318 } else {
1319 tomoyo_set_slash(head);
1320 }
1321 tomoyo_set_string(head, tomoyo_mac_keywords
1322 [tomoyo_pp2mac[bit]]);
1323 }
1324 if (first)
1325 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001326 tomoyo_print_name_union(head, &ptr->name1);
1327 tomoyo_print_name_union(head, &ptr->name2);
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001328 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1329 struct tomoyo_path_number_acl *ptr =
1330 container_of(acl, typeof(*ptr), head);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001331 const u8 perm = ptr->perm;
1332 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1333 if (!(perm & (1 << bit)))
1334 continue;
1335 if (first) {
1336 tomoyo_set_group(head, "file ");
1337 first = false;
1338 } else {
1339 tomoyo_set_slash(head);
1340 }
1341 tomoyo_set_string(head, tomoyo_mac_keywords
1342 [tomoyo_pn2mac[bit]]);
1343 }
1344 if (first)
1345 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001346 tomoyo_print_name_union(head, &ptr->name);
1347 tomoyo_print_number_union(head, &ptr->number);
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001348 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1349 struct tomoyo_mkdev_acl *ptr =
1350 container_of(acl, typeof(*ptr), head);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001351 const u8 perm = ptr->perm;
1352 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1353 if (!(perm & (1 << bit)))
1354 continue;
1355 if (first) {
1356 tomoyo_set_group(head, "file ");
1357 first = false;
1358 } else {
1359 tomoyo_set_slash(head);
1360 }
1361 tomoyo_set_string(head, tomoyo_mac_keywords
1362 [tomoyo_pnnn2mac[bit]]);
1363 }
1364 if (first)
1365 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001366 tomoyo_print_name_union(head, &ptr->name);
1367 tomoyo_print_number_union(head, &ptr->mode);
1368 tomoyo_print_number_union(head, &ptr->major);
1369 tomoyo_print_number_union(head, &ptr->minor);
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001370 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1371 struct tomoyo_mount_acl *ptr =
1372 container_of(acl, typeof(*ptr), head);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001373 tomoyo_set_group(head, "file mount");
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001374 tomoyo_print_name_union(head, &ptr->dev_name);
1375 tomoyo_print_name_union(head, &ptr->dir_name);
1376 tomoyo_print_name_union(head, &ptr->fs_type);
1377 tomoyo_print_number_union(head, &ptr->flags);
Kentaro Takeda95908372009-02-05 17:18:13 +09001378 }
Tetsuo Handa2066a362011-07-08 13:21:37 +09001379 if (acl->cond) {
1380 head->r.print_cond_part = true;
1381 head->r.cond_step = 0;
1382 if (!tomoyo_flush(head))
1383 return false;
1384print_cond_part:
1385 if (!tomoyo_print_condition(head, acl->cond))
1386 return false;
1387 head->r.print_cond_part = false;
1388 } else {
1389 tomoyo_set_lf(head);
1390 }
Tetsuo Handa5db5a392010-06-24 12:24:19 +09001391 return true;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001392}
1393
1394/**
1395 * tomoyo_read_domain2 - Read domain policy.
1396 *
Tetsuo Handa32997142011-06-26 23:19:28 +09001397 * @head: Pointer to "struct tomoyo_io_buffer".
1398 * @list: Pointer to "struct list_head".
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001399 *
1400 * Caller holds tomoyo_read_lock().
1401 *
1402 * Returns true on success, false otherwise.
1403 */
1404static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
Tetsuo Handa32997142011-06-26 23:19:28 +09001405 struct list_head *list)
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001406{
Tetsuo Handa32997142011-06-26 23:19:28 +09001407 list_for_each_cookie(head->r.acl, list) {
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001408 struct tomoyo_acl_info *ptr =
1409 list_entry(head->r.acl, typeof(*ptr), list);
1410 if (!tomoyo_print_entry(head, ptr))
1411 return false;
1412 }
1413 head->r.acl = NULL;
1414 return true;
Kentaro Takeda95908372009-02-05 17:18:13 +09001415}
1416
1417/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001418 * tomoyo_read_domain - Read domain policy.
Kentaro Takeda95908372009-02-05 17:18:13 +09001419 *
1420 * @head: Pointer to "struct tomoyo_io_buffer".
1421 *
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001422 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +09001423 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001424static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09001425{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001426 if (head->r.eof)
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001427 return;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001428 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
Tetsuo Handa475e6fa2010-06-24 11:28:14 +09001429 struct tomoyo_domain_info *domain =
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001430 list_entry(head->r.domain, typeof(*domain), list);
1431 switch (head->r.step) {
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09001432 u8 i;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001433 case 0:
1434 if (domain->is_deleted &&
1435 !head->r.print_this_domain_only)
1436 continue;
1437 /* Print domainname and flags. */
1438 tomoyo_set_string(head, domain->domainname->name);
1439 tomoyo_set_lf(head);
Tetsuo Handab5bc60b2011-06-26 23:16:03 +09001440 tomoyo_io_printf(head, "use_profile %u\n",
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001441 domain->profile);
Tetsuo Handa32997142011-06-26 23:19:28 +09001442 tomoyo_io_printf(head, "use_group %u\n",
1443 domain->group);
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09001444 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1445 if (domain->flags[i])
1446 tomoyo_set_string(head, tomoyo_dif[i]);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001447 head->r.step++;
1448 tomoyo_set_lf(head);
1449 /* fall through */
1450 case 1:
Tetsuo Handa32997142011-06-26 23:19:28 +09001451 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001452 return;
1453 head->r.step++;
1454 if (!tomoyo_set_lf(head))
1455 return;
1456 /* fall through */
1457 case 2:
1458 head->r.step = 0;
1459 if (head->r.print_this_domain_only)
1460 goto done;
Kentaro Takeda95908372009-02-05 17:18:13 +09001461 }
Kentaro Takeda95908372009-02-05 17:18:13 +09001462 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001463 done:
1464 head->r.eof = true;
Kentaro Takeda95908372009-02-05 17:18:13 +09001465}
1466
1467/**
Kentaro Takeda95908372009-02-05 17:18:13 +09001468 * tomoyo_write_pid: Specify PID to obtain domainname.
1469 *
1470 * @head: Pointer to "struct tomoyo_io_buffer".
1471 *
1472 * Returns 0.
1473 */
1474static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1475{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001476 head->r.eof = false;
Kentaro Takeda95908372009-02-05 17:18:13 +09001477 return 0;
1478}
1479
1480/**
1481 * tomoyo_read_pid - Get domainname of the specified PID.
1482 *
1483 * @head: Pointer to "struct tomoyo_io_buffer".
1484 *
1485 * Returns the domainname which the specified PID is in on success,
1486 * empty string otherwise.
1487 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1488 * using read()/write() interface rather than sysctl() interface.
1489 */
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001490static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09001491{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001492 char *buf = head->write_buf;
1493 bool global_pid = false;
1494 unsigned int pid;
1495 struct task_struct *p;
1496 struct tomoyo_domain_info *domain = NULL;
1497
1498 /* Accessing write_buf is safe because head->io_sem is held. */
1499 if (!buf) {
1500 head->r.eof = true;
1501 return; /* Do nothing if open(O_RDONLY). */
Kentaro Takeda95908372009-02-05 17:18:13 +09001502 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001503 if (head->r.w_pos || head->r.eof)
1504 return;
1505 head->r.eof = true;
1506 if (tomoyo_str_starts(&buf, "global-pid "))
1507 global_pid = true;
1508 pid = (unsigned int) simple_strtoul(buf, NULL, 10);
1509 rcu_read_lock();
1510 read_lock(&tasklist_lock);
1511 if (global_pid)
1512 p = find_task_by_pid_ns(pid, &init_pid_ns);
1513 else
1514 p = find_task_by_vpid(pid);
1515 if (p)
1516 domain = tomoyo_real_domain(p);
1517 read_unlock(&tasklist_lock);
1518 rcu_read_unlock();
1519 if (!domain)
1520 return;
1521 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1522 tomoyo_set_string(head, domain->domainname->name);
Kentaro Takeda95908372009-02-05 17:18:13 +09001523}
1524
Tetsuo Handa0f2a55d2011-07-14 14:46:51 +09001525/* String table for domain transition control keywords. */
Tetsuo Handa5448ec42010-06-21 11:14:39 +09001526static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001527 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1528 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1529 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1530 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1531 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1532 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
Tetsuo Handa5448ec42010-06-21 11:14:39 +09001533};
1534
Tetsuo Handa0f2a55d2011-07-14 14:46:51 +09001535/* String table for grouping keywords. */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001536static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
Tetsuo Handab5bc60b2011-06-26 23:16:03 +09001537 [TOMOYO_PATH_GROUP] = "path_group ",
1538 [TOMOYO_NUMBER_GROUP] = "number_group ",
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001539};
1540
Kentaro Takeda95908372009-02-05 17:18:13 +09001541/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001542 * tomoyo_write_exception - Write exception policy.
Kentaro Takeda95908372009-02-05 17:18:13 +09001543 *
1544 * @head: Pointer to "struct tomoyo_io_buffer".
1545 *
1546 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001547 *
1548 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +09001549 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001550static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09001551{
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001552 const bool is_delete = head->w.is_delete;
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001553 struct tomoyo_acl_param param = {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001554 .ns = head->w.ns,
1555 .is_delete = is_delete,
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001556 .data = head->write_buf,
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001557 };
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001558 u8 i;
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001559 if (tomoyo_str_starts(&param.data, "aggregator "))
1560 return tomoyo_write_aggregator(&param);
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001561 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001562 if (tomoyo_str_starts(&param.data, tomoyo_transition_type[i]))
1563 return tomoyo_write_transition_control(&param, i);
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001564 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
Tetsuo Handaa238cf52011-06-26 23:17:10 +09001565 if (tomoyo_str_starts(&param.data, tomoyo_group_name[i]))
1566 return tomoyo_write_group(&param, i);
Tetsuo Handa32997142011-06-26 23:19:28 +09001567 if (tomoyo_str_starts(&param.data, "acl_group ")) {
1568 unsigned int group;
1569 char *data;
1570 group = simple_strtoul(param.data, &data, 10);
1571 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001572 return tomoyo_write_domain2
1573 (head->w.ns, &head->w.ns->acl_group[group],
1574 data, is_delete);
Tetsuo Handa32997142011-06-26 23:19:28 +09001575 }
Kentaro Takeda95908372009-02-05 17:18:13 +09001576 return -EINVAL;
1577}
1578
Tetsuo Handa31845e82010-06-17 16:54:33 +09001579/**
1580 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
1581 *
1582 * @head: Pointer to "struct tomoyo_io_buffer".
1583 * @idx: Index number.
1584 *
1585 * Returns true on success, false otherwise.
1586 *
1587 * Caller holds tomoyo_read_lock().
1588 */
1589static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1590{
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001591 struct tomoyo_policy_namespace *ns =
1592 container_of(head->r.ns, typeof(*ns), namespace_list);
1593 struct list_head *list = &ns->group_list[idx];
1594 list_for_each_cookie(head->r.group, list) {
Tetsuo Handa31845e82010-06-17 16:54:33 +09001595 struct tomoyo_group *group =
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09001596 list_entry(head->r.group, typeof(*group), head.list);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001597 list_for_each_cookie(head->r.acl, &group->member_list) {
Tetsuo Handa31845e82010-06-17 16:54:33 +09001598 struct tomoyo_acl_head *ptr =
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001599 list_entry(head->r.acl, typeof(*ptr), list);
Tetsuo Handa31845e82010-06-17 16:54:33 +09001600 if (ptr->is_deleted)
1601 continue;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001602 if (!tomoyo_flush(head))
Tetsuo Handa31845e82010-06-17 16:54:33 +09001603 return false;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001604 tomoyo_print_namespace(head);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001605 tomoyo_set_string(head, tomoyo_group_name[idx]);
1606 tomoyo_set_string(head, group->group_name->name);
1607 if (idx == TOMOYO_PATH_GROUP) {
1608 tomoyo_set_space(head);
1609 tomoyo_set_string(head, container_of
1610 (ptr, struct tomoyo_path_group,
1611 head)->member_name->name);
1612 } else if (idx == TOMOYO_NUMBER_GROUP) {
1613 tomoyo_print_number_union(head, &container_of
1614 (ptr,
1615 struct tomoyo_number_group,
1616 head)->number);
1617 }
1618 tomoyo_set_lf(head);
Tetsuo Handa31845e82010-06-17 16:54:33 +09001619 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001620 head->r.acl = NULL;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001621 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001622 head->r.group = NULL;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001623 return true;
1624}
1625
1626/**
1627 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1628 *
1629 * @head: Pointer to "struct tomoyo_io_buffer".
1630 * @idx: Index number.
1631 *
1632 * Returns true on success, false otherwise.
1633 *
1634 * Caller holds tomoyo_read_lock().
1635 */
1636static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1637{
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001638 struct tomoyo_policy_namespace *ns =
1639 container_of(head->r.ns, typeof(*ns), namespace_list);
1640 struct list_head *list = &ns->policy_list[idx];
1641 list_for_each_cookie(head->r.acl, list) {
Tetsuo Handa475e6fa2010-06-24 11:28:14 +09001642 struct tomoyo_acl_head *acl =
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001643 container_of(head->r.acl, typeof(*acl), list);
Tetsuo Handa31845e82010-06-17 16:54:33 +09001644 if (acl->is_deleted)
1645 continue;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001646 if (!tomoyo_flush(head))
1647 return false;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001648 switch (idx) {
Tetsuo Handa5448ec42010-06-21 11:14:39 +09001649 case TOMOYO_ID_TRANSITION_CONTROL:
Tetsuo Handa31845e82010-06-17 16:54:33 +09001650 {
Tetsuo Handa5448ec42010-06-21 11:14:39 +09001651 struct tomoyo_transition_control *ptr =
Tetsuo Handa31845e82010-06-17 16:54:33 +09001652 container_of(acl, typeof(*ptr), head);
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001653 tomoyo_print_namespace(head);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001654 tomoyo_set_string(head, tomoyo_transition_type
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001655 [ptr->type]);
Tetsuo Handa0d2171d2011-06-26 23:17:46 +09001656 tomoyo_set_string(head, ptr->program ?
1657 ptr->program->name : "any");
1658 tomoyo_set_string(head, " from ");
1659 tomoyo_set_string(head, ptr->domainname ?
1660 ptr->domainname->name :
1661 "any");
Tetsuo Handa31845e82010-06-17 16:54:33 +09001662 }
1663 break;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001664 case TOMOYO_ID_AGGREGATOR:
1665 {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001666 struct tomoyo_aggregator *ptr =
Tetsuo Handa31845e82010-06-17 16:54:33 +09001667 container_of(acl, typeof(*ptr), head);
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001668 tomoyo_print_namespace(head);
Tetsuo Handab5bc60b2011-06-26 23:16:03 +09001669 tomoyo_set_string(head, "aggregator ");
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001670 tomoyo_set_string(head,
1671 ptr->original_name->name);
1672 tomoyo_set_space(head);
1673 tomoyo_set_string(head,
1674 ptr->aggregated_name->name);
Tetsuo Handa31845e82010-06-17 16:54:33 +09001675 }
1676 break;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001677 default:
1678 continue;
1679 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001680 tomoyo_set_lf(head);
Tetsuo Handa31845e82010-06-17 16:54:33 +09001681 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001682 head->r.acl = NULL;
Tetsuo Handa31845e82010-06-17 16:54:33 +09001683 return true;
1684}
1685
Kentaro Takeda95908372009-02-05 17:18:13 +09001686/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001687 * tomoyo_read_exception - Read exception policy.
Kentaro Takeda95908372009-02-05 17:18:13 +09001688 *
1689 * @head: Pointer to "struct tomoyo_io_buffer".
1690 *
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001691 * Caller holds tomoyo_read_lock().
Kentaro Takeda95908372009-02-05 17:18:13 +09001692 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001693static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09001694{
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001695 struct tomoyo_policy_namespace *ns =
1696 container_of(head->r.ns, typeof(*ns), namespace_list);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001697 if (head->r.eof)
Tetsuo Handa31845e82010-06-17 16:54:33 +09001698 return;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001699 while (head->r.step < TOMOYO_MAX_POLICY &&
1700 tomoyo_read_policy(head, head->r.step))
1701 head->r.step++;
1702 if (head->r.step < TOMOYO_MAX_POLICY)
Tetsuo Handa31845e82010-06-17 16:54:33 +09001703 return;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001704 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1705 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1706 head->r.step++;
1707 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
Tetsuo Handa31845e82010-06-17 16:54:33 +09001708 return;
Tetsuo Handa32997142011-06-26 23:19:28 +09001709 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1710 + TOMOYO_MAX_ACL_GROUPS) {
1711 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1712 - TOMOYO_MAX_GROUP;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09001713 if (!tomoyo_read_domain2(head, &ns->acl_group
Tetsuo Handa32997142011-06-26 23:19:28 +09001714 [head->r.acl_group_index]))
1715 return;
1716 head->r.step++;
1717 }
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001718 head->r.eof = true;
Kentaro Takeda95908372009-02-05 17:18:13 +09001719}
1720
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001721/* Wait queue for kernel -> userspace notification. */
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001722static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001723/* Wait queue for userspace -> kernel notification. */
1724static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001725
1726/* Structure for query. */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001727struct tomoyo_query {
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001728 struct list_head list;
1729 char *query;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001730 size_t query_len;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001731 unsigned int serial;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001732 u8 timer;
1733 u8 answer;
1734 u8 retry;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001735};
1736
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001737/* The list for "struct tomoyo_query". */
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001738static LIST_HEAD(tomoyo_query_list);
1739
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001740/* Lock for manipulating tomoyo_query_list. */
1741static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1742
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001743/*
1744 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1745 * interface.
1746 */
1747static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1748
1749/**
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001750 * tomoyo_truncate - Truncate a line.
1751 *
1752 * @str: String to truncate.
1753 *
1754 * Returns length of truncated @str.
1755 */
1756static int tomoyo_truncate(char *str)
1757{
1758 char *start = str;
1759 while (*(unsigned char *) str > (unsigned char) ' ')
1760 str++;
1761 *str = '\0';
1762 return strlen(start) + 1;
1763}
1764
1765/**
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001766 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1767 *
1768 * @domain: Pointer to "struct tomoyo_domain_info".
1769 * @header: Lines containing ACL.
1770 *
1771 * Returns nothing.
1772 */
1773static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
1774{
1775 char *buffer;
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001776 char *realpath = NULL;
Tetsuo Handa5b636852011-07-08 13:24:54 +09001777 char *argv0 = NULL;
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001778 char *symlink = NULL;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001779 char *cp = strchr(header, '\n');
1780 int len;
1781 if (!cp)
1782 return;
1783 cp = strchr(cp + 1, '\n');
1784 if (!cp)
1785 return;
1786 *cp++ = '\0';
1787 len = strlen(cp) + 1;
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001788 /* strstr() will return NULL if ordering is wrong. */
1789 if (*cp == 'f') {
Tetsuo Handa5b636852011-07-08 13:24:54 +09001790 argv0 = strstr(header, " argv[]={ \"");
1791 if (argv0) {
1792 argv0 += 10;
1793 len += tomoyo_truncate(argv0) + 14;
1794 }
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001795 realpath = strstr(header, " exec={ realpath=\"");
1796 if (realpath) {
1797 realpath += 8;
1798 len += tomoyo_truncate(realpath) + 6;
1799 }
1800 symlink = strstr(header, " symlink.target=\"");
1801 if (symlink)
1802 len += tomoyo_truncate(symlink + 1) + 1;
1803 }
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001804 buffer = kmalloc(len, GFP_NOFS);
1805 if (!buffer)
1806 return;
1807 snprintf(buffer, len - 1, "%s", cp);
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001808 if (realpath)
1809 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
Tetsuo Handa5b636852011-07-08 13:24:54 +09001810 if (argv0)
1811 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
Tetsuo Handa2ca9bf42011-07-08 13:23:44 +09001812 if (symlink)
1813 tomoyo_addprintf(buffer, len, "%s", symlink);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001814 tomoyo_normalize_line(buffer);
Tetsuo Handab22b8b92011-06-26 23:21:50 +09001815 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
1816 false))
1817 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001818 kfree(buffer);
1819}
1820
1821/**
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001822 * tomoyo_supervisor - Ask for the supervisor's decision.
1823 *
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001824 * @r: Pointer to "struct tomoyo_request_info".
1825 * @fmt: The printf()'s format string, followed by parameters.
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001826 *
1827 * Returns 0 if the supervisor decided to permit the access request which
1828 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1829 * supervisor decided to retry the access request which violated the policy in
1830 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1831 */
1832int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1833{
1834 va_list args;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001835 int error;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001836 int len;
1837 static unsigned int tomoyo_serial;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001838 struct tomoyo_query entry = { };
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001839 bool quota_exceeded = false;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001840 va_start(args, fmt);
1841 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
1842 va_end(args);
1843 /* Write /sys/kernel/security/tomoyo/audit. */
1844 va_start(args, fmt);
1845 tomoyo_write_log2(r, len, fmt, args);
1846 va_end(args);
1847 /* Nothing more to do if granted. */
1848 if (r->granted)
1849 return 0;
Tetsuo Handab22b8b92011-06-26 23:21:50 +09001850 if (r->mode)
1851 tomoyo_update_stat(r->mode);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001852 switch (r->mode) {
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001853 case TOMOYO_CONFIG_ENFORCING:
1854 error = -EPERM;
1855 if (atomic_read(&tomoyo_query_observers))
1856 break;
1857 goto out;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001858 case TOMOYO_CONFIG_LEARNING:
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001859 error = 0;
1860 /* Check max_learning_entry parameter. */
1861 if (tomoyo_domain_quota_is_ok(r))
1862 break;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001863 /* fall through */
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001864 default:
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001865 return 0;
1866 }
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001867 /* Get message. */
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001868 va_start(args, fmt);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001869 entry.query = tomoyo_init_log(r, len, fmt, args);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001870 va_end(args);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001871 if (!entry.query)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001872 goto out;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001873 entry.query_len = strlen(entry.query) + 1;
1874 if (!error) {
1875 tomoyo_add_entry(r->domain, entry.query);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001876 goto out;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001877 }
1878 len = tomoyo_round2(entry.query_len);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001879 spin_lock(&tomoyo_query_list_lock);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001880 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
1881 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
1882 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001883 quota_exceeded = true;
1884 } else {
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001885 entry.serial = tomoyo_serial++;
1886 entry.retry = r->retry;
1887 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
1888 list_add_tail(&entry.list, &tomoyo_query_list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001889 }
1890 spin_unlock(&tomoyo_query_list_lock);
1891 if (quota_exceeded)
1892 goto out;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001893 /* Give 10 seconds for supervisor's opinion. */
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001894 while (entry.timer < 10) {
1895 wake_up_all(&tomoyo_query_wait);
1896 if (wait_event_interruptible_timeout
1897 (tomoyo_answer_wait, entry.answer ||
1898 !atomic_read(&tomoyo_query_observers), HZ))
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001899 break;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001900 else
1901 entry.timer++;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001902 }
1903 spin_lock(&tomoyo_query_list_lock);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001904 list_del(&entry.list);
1905 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001906 spin_unlock(&tomoyo_query_list_lock);
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001907 switch (entry.answer) {
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001908 case 3: /* Asked to retry by administrator. */
1909 error = TOMOYO_RETRY_REQUEST;
1910 r->retry++;
1911 break;
1912 case 1:
1913 /* Granted by administrator. */
1914 error = 0;
1915 break;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001916 default:
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001917 /* Timed out or rejected by administrator. */
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001918 break;
1919 }
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001920out:
1921 kfree(entry.query);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001922 return error;
1923}
1924
1925/**
1926 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1927 *
1928 * @file: Pointer to "struct file".
1929 * @wait: Pointer to "poll_table".
1930 *
1931 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1932 *
1933 * Waits for access requests which violated policy in enforcing mode.
1934 */
1935static int tomoyo_poll_query(struct file *file, poll_table *wait)
1936{
1937 struct list_head *tmp;
1938 bool found = false;
1939 u8 i;
1940 for (i = 0; i < 2; i++) {
1941 spin_lock(&tomoyo_query_list_lock);
1942 list_for_each(tmp, &tomoyo_query_list) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001943 struct tomoyo_query *ptr =
1944 list_entry(tmp, typeof(*ptr), list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001945 if (ptr->answer)
1946 continue;
1947 found = true;
1948 break;
1949 }
1950 spin_unlock(&tomoyo_query_list_lock);
1951 if (found)
1952 return POLLIN | POLLRDNORM;
1953 if (i)
1954 break;
1955 poll_wait(file, &tomoyo_query_wait, wait);
1956 }
1957 return 0;
1958}
1959
1960/**
1961 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1962 *
1963 * @head: Pointer to "struct tomoyo_io_buffer".
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001964 */
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001965static void tomoyo_read_query(struct tomoyo_io_buffer *head)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001966{
1967 struct list_head *tmp;
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09001968 unsigned int pos = 0;
1969 size_t len = 0;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001970 char *buf;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001971 if (head->r.w_pos)
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001972 return;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001973 if (head->read_buf) {
1974 kfree(head->read_buf);
1975 head->read_buf = NULL;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001976 }
1977 spin_lock(&tomoyo_query_list_lock);
1978 list_for_each(tmp, &tomoyo_query_list) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001979 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001980 if (ptr->answer)
1981 continue;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001982 if (pos++ != head->r.query_index)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001983 continue;
1984 len = ptr->query_len;
1985 break;
1986 }
1987 spin_unlock(&tomoyo_query_list_lock);
1988 if (!len) {
Tetsuo Handaf23571e2010-06-24 14:57:16 +09001989 head->r.query_index = 0;
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001990 return;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001991 }
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09001992 buf = kzalloc(len + 32, GFP_NOFS);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001993 if (!buf)
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09001994 return;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001995 pos = 0;
1996 spin_lock(&tomoyo_query_list_lock);
1997 list_for_each(tmp, &tomoyo_query_list) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001998 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001999 if (ptr->answer)
2000 continue;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002001 if (pos++ != head->r.query_index)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002002 continue;
2003 /*
2004 * Some query can be skipped because tomoyo_query_list
2005 * can change, but I don't care.
2006 */
2007 if (len == ptr->query_len)
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09002008 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2009 ptr->retry, ptr->query);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002010 break;
2011 }
2012 spin_unlock(&tomoyo_query_list_lock);
2013 if (buf[0]) {
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002014 head->read_buf = buf;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002015 head->r.w[head->r.w_pos++] = buf;
2016 head->r.query_index++;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002017 } else {
2018 kfree(buf);
2019 }
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002020}
2021
2022/**
2023 * tomoyo_write_answer - Write the supervisor's decision.
2024 *
2025 * @head: Pointer to "struct tomoyo_io_buffer".
2026 *
2027 * Returns 0 on success, -EINVAL otherwise.
2028 */
2029static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2030{
2031 char *data = head->write_buf;
2032 struct list_head *tmp;
2033 unsigned int serial;
2034 unsigned int answer;
2035 spin_lock(&tomoyo_query_list_lock);
2036 list_for_each(tmp, &tomoyo_query_list) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09002037 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002038 ptr->timer = 0;
2039 }
2040 spin_unlock(&tomoyo_query_list_lock);
2041 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2042 return -EINVAL;
2043 spin_lock(&tomoyo_query_list_lock);
2044 list_for_each(tmp, &tomoyo_query_list) {
Tetsuo Handae2bf6902010-06-25 11:16:00 +09002045 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002046 if (ptr->serial != serial)
2047 continue;
2048 if (!ptr->answer)
2049 ptr->answer = answer;
2050 break;
2051 }
2052 spin_unlock(&tomoyo_query_list_lock);
2053 return 0;
2054}
2055
2056/**
Kentaro Takeda95908372009-02-05 17:18:13 +09002057 * tomoyo_read_version: Get version.
2058 *
2059 * @head: Pointer to "struct tomoyo_io_buffer".
2060 *
2061 * Returns version information.
2062 */
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09002063static void tomoyo_read_version(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09002064{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002065 if (!head->r.eof) {
Tetsuo Handad5ca1722011-06-26 23:18:21 +09002066 tomoyo_io_printf(head, "2.4.0");
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002067 head->r.eof = true;
Kentaro Takeda95908372009-02-05 17:18:13 +09002068 }
Kentaro Takeda95908372009-02-05 17:18:13 +09002069}
2070
2071/**
2072 * tomoyo_read_self_domain - Get the current process's domainname.
2073 *
2074 * @head: Pointer to "struct tomoyo_io_buffer".
2075 *
2076 * Returns the current process's domainname.
2077 */
Tetsuo Handa8fbe71f2010-06-16 16:29:59 +09002078static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09002079{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002080 if (!head->r.eof) {
Kentaro Takeda95908372009-02-05 17:18:13 +09002081 /*
2082 * tomoyo_domain()->domainname != NULL
2083 * because every process belongs to a domain and
2084 * the domain's name cannot be NULL.
2085 */
2086 tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002087 head->r.eof = true;
Kentaro Takeda95908372009-02-05 17:18:13 +09002088 }
Kentaro Takeda95908372009-02-05 17:18:13 +09002089}
2090
Tetsuo Handab22b8b92011-06-26 23:21:50 +09002091/* String table for /sys/kernel/security/tomoyo/stat interface. */
2092static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2093 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2094 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2095 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2096 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2097};
2098
2099/* String table for /sys/kernel/security/tomoyo/stat interface. */
2100static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2101 [TOMOYO_MEMORY_POLICY] = "policy:",
2102 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2103 [TOMOYO_MEMORY_QUERY] = "query message:",
2104};
2105
2106/* Timestamp counter for last updated. */
2107static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2108/* Counter for number of updates. */
2109static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
2110
2111/**
2112 * tomoyo_update_stat - Update statistic counters.
2113 *
2114 * @index: Index for policy type.
2115 *
2116 * Returns nothing.
2117 */
2118void tomoyo_update_stat(const u8 index)
2119{
2120 struct timeval tv;
2121 do_gettimeofday(&tv);
2122 /*
2123 * I don't use atomic operations because race condition is not fatal.
2124 */
2125 tomoyo_stat_updated[index]++;
2126 tomoyo_stat_modified[index] = tv.tv_sec;
2127}
2128
2129/**
2130 * tomoyo_read_stat - Read statistic data.
2131 *
2132 * @head: Pointer to "struct tomoyo_io_buffer".
2133 *
2134 * Returns nothing.
2135 */
2136static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2137{
2138 u8 i;
2139 unsigned int total = 0;
2140 if (head->r.eof)
2141 return;
2142 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2143 tomoyo_io_printf(head, "Policy %-30s %10u",
2144 tomoyo_policy_headers[i],
2145 tomoyo_stat_updated[i]);
2146 if (tomoyo_stat_modified[i]) {
2147 struct tomoyo_time stamp;
2148 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
2149 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
2150 "%02u:%02u:%02u)",
2151 stamp.year, stamp.month, stamp.day,
2152 stamp.hour, stamp.min, stamp.sec);
2153 }
2154 tomoyo_set_lf(head);
2155 }
2156 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2157 unsigned int used = tomoyo_memory_used[i];
2158 total += used;
2159 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2160 tomoyo_memory_headers[i], used);
2161 used = tomoyo_memory_quota[i];
2162 if (used)
2163 tomoyo_io_printf(head, " (Quota: %10u)", used);
2164 tomoyo_set_lf(head);
2165 }
2166 tomoyo_io_printf(head, "Total memory used: %10u\n",
2167 total);
2168 head->r.eof = true;
2169}
2170
2171/**
2172 * tomoyo_write_stat - Set memory quota.
2173 *
2174 * @head: Pointer to "struct tomoyo_io_buffer".
2175 *
2176 * Returns 0.
2177 */
2178static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2179{
2180 char *data = head->write_buf;
2181 u8 i;
2182 if (tomoyo_str_starts(&data, "Memory used by "))
2183 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2184 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2185 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2186 return 0;
2187}
2188
Kentaro Takeda95908372009-02-05 17:18:13 +09002189/**
2190 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2191 *
2192 * @type: Type of interface.
2193 * @file: Pointer to "struct file".
2194 *
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002195 * Returns 0 on success, negative value otherwise.
Kentaro Takeda95908372009-02-05 17:18:13 +09002196 */
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002197int tomoyo_open_control(const u8 type, struct file *file)
Kentaro Takeda95908372009-02-05 17:18:13 +09002198{
Tetsuo Handa4e5d6f72010-04-28 14:17:42 +09002199 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
Kentaro Takeda95908372009-02-05 17:18:13 +09002200
2201 if (!head)
2202 return -ENOMEM;
2203 mutex_init(&head->io_sem);
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002204 head->type = type;
Kentaro Takeda95908372009-02-05 17:18:13 +09002205 switch (type) {
2206 case TOMOYO_DOMAINPOLICY:
2207 /* /sys/kernel/security/tomoyo/domain_policy */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09002208 head->write = tomoyo_write_domain;
2209 head->read = tomoyo_read_domain;
Kentaro Takeda95908372009-02-05 17:18:13 +09002210 break;
2211 case TOMOYO_EXCEPTIONPOLICY:
2212 /* /sys/kernel/security/tomoyo/exception_policy */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09002213 head->write = tomoyo_write_exception;
2214 head->read = tomoyo_read_exception;
Kentaro Takeda95908372009-02-05 17:18:13 +09002215 break;
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09002216 case TOMOYO_AUDIT:
2217 /* /sys/kernel/security/tomoyo/audit */
2218 head->poll = tomoyo_poll_log;
2219 head->read = tomoyo_read_log;
2220 break;
Kentaro Takeda95908372009-02-05 17:18:13 +09002221 case TOMOYO_SELFDOMAIN:
2222 /* /sys/kernel/security/tomoyo/self_domain */
2223 head->read = tomoyo_read_self_domain;
2224 break;
Kentaro Takeda95908372009-02-05 17:18:13 +09002225 case TOMOYO_PROCESS_STATUS:
2226 /* /sys/kernel/security/tomoyo/.process_status */
2227 head->write = tomoyo_write_pid;
2228 head->read = tomoyo_read_pid;
2229 break;
2230 case TOMOYO_VERSION:
2231 /* /sys/kernel/security/tomoyo/version */
2232 head->read = tomoyo_read_version;
2233 head->readbuf_size = 128;
2234 break;
Tetsuo Handab22b8b92011-06-26 23:21:50 +09002235 case TOMOYO_STAT:
2236 /* /sys/kernel/security/tomoyo/stat */
2237 head->write = tomoyo_write_stat;
2238 head->read = tomoyo_read_stat;
2239 head->readbuf_size = 1024;
Kentaro Takeda95908372009-02-05 17:18:13 +09002240 break;
2241 case TOMOYO_PROFILE:
2242 /* /sys/kernel/security/tomoyo/profile */
2243 head->write = tomoyo_write_profile;
2244 head->read = tomoyo_read_profile;
2245 break;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002246 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2247 head->poll = tomoyo_poll_query;
2248 head->write = tomoyo_write_answer;
2249 head->read = tomoyo_read_query;
2250 break;
Kentaro Takeda95908372009-02-05 17:18:13 +09002251 case TOMOYO_MANAGER:
2252 /* /sys/kernel/security/tomoyo/manager */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09002253 head->write = tomoyo_write_manager;
2254 head->read = tomoyo_read_manager;
Kentaro Takeda95908372009-02-05 17:18:13 +09002255 break;
2256 }
2257 if (!(file->f_mode & FMODE_READ)) {
2258 /*
2259 * No need to allocate read_buf since it is not opened
2260 * for reading.
2261 */
2262 head->read = NULL;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002263 head->poll = NULL;
2264 } else if (!head->poll) {
2265 /* Don't allocate read_buf for poll() access. */
Kentaro Takeda95908372009-02-05 17:18:13 +09002266 if (!head->readbuf_size)
2267 head->readbuf_size = 4096 * 2;
Tetsuo Handa4e5d6f72010-04-28 14:17:42 +09002268 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
Kentaro Takeda95908372009-02-05 17:18:13 +09002269 if (!head->read_buf) {
Tetsuo Handa8e2d39a2010-01-26 20:45:27 +09002270 kfree(head);
Kentaro Takeda95908372009-02-05 17:18:13 +09002271 return -ENOMEM;
2272 }
2273 }
2274 if (!(file->f_mode & FMODE_WRITE)) {
2275 /*
2276 * No need to allocate write_buf since it is not opened
2277 * for writing.
2278 */
2279 head->write = NULL;
2280 } else if (head->write) {
2281 head->writebuf_size = 4096 * 2;
Tetsuo Handa4e5d6f72010-04-28 14:17:42 +09002282 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
Kentaro Takeda95908372009-02-05 17:18:13 +09002283 if (!head->write_buf) {
Tetsuo Handa8e2d39a2010-01-26 20:45:27 +09002284 kfree(head->read_buf);
2285 kfree(head);
Kentaro Takeda95908372009-02-05 17:18:13 +09002286 return -ENOMEM;
2287 }
2288 }
Kentaro Takeda95908372009-02-05 17:18:13 +09002289 /*
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002290 * If the file is /sys/kernel/security/tomoyo/query , increment the
2291 * observer counter.
2292 * The obserber counter is used by tomoyo_supervisor() to see if
2293 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2294 */
Tetsuo Handa7c759642011-06-26 23:15:31 +09002295 if (type == TOMOYO_QUERY)
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002296 atomic_inc(&tomoyo_query_observers);
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002297 file->private_data = head;
2298 tomoyo_notify_gc(head, true);
Kentaro Takeda95908372009-02-05 17:18:13 +09002299 return 0;
2300}
2301
2302/**
Tetsuo Handa0849e3b2010-06-25 12:22:09 +09002303 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2304 *
2305 * @file: Pointer to "struct file".
2306 * @wait: Pointer to "poll_table".
2307 *
2308 * Waits for read readiness.
Tetsuo Handaeadd99c2011-06-26 23:18:58 +09002309 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
2310 * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
Tetsuo Handa0849e3b2010-06-25 12:22:09 +09002311 */
2312int tomoyo_poll_control(struct file *file, poll_table *wait)
2313{
2314 struct tomoyo_io_buffer *head = file->private_data;
2315 if (!head->poll)
2316 return -ENOSYS;
2317 return head->poll(file, wait);
2318}
2319
2320/**
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002321 * tomoyo_set_namespace_cursor - Set namespace to read.
2322 *
2323 * @head: Pointer to "struct tomoyo_io_buffer".
2324 *
2325 * Returns nothing.
2326 */
2327static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2328{
2329 struct list_head *ns;
2330 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2331 head->type != TOMOYO_PROFILE)
2332 return;
2333 /*
2334 * If this is the first read, or reading previous namespace finished
2335 * and has more namespaces to read, update the namespace cursor.
2336 */
2337 ns = head->r.ns;
2338 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2339 /* Clearing is OK because tomoyo_flush() returned true. */
2340 memset(&head->r, 0, sizeof(head->r));
2341 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2342 }
2343}
2344
2345/**
2346 * tomoyo_has_more_namespace - Check for unread namespaces.
2347 *
2348 * @head: Pointer to "struct tomoyo_io_buffer".
2349 *
2350 * Returns true if we have more entries to print, false otherwise.
2351 */
2352static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2353{
2354 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2355 head->type == TOMOYO_PROFILE) && head->r.eof &&
2356 head->r.ns->next != &tomoyo_namespace_list;
2357}
2358
2359/**
Kentaro Takeda95908372009-02-05 17:18:13 +09002360 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2361 *
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002362 * @head: Pointer to "struct tomoyo_io_buffer".
Kentaro Takeda95908372009-02-05 17:18:13 +09002363 * @buffer: Poiner to buffer to write to.
2364 * @buffer_len: Size of @buffer.
2365 *
2366 * Returns bytes read on success, negative value otherwise.
2367 */
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09002368ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2369 const int buffer_len)
Kentaro Takeda95908372009-02-05 17:18:13 +09002370{
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002371 int len;
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002372 int idx;
Kentaro Takeda95908372009-02-05 17:18:13 +09002373
2374 if (!head->read)
2375 return -ENOSYS;
2376 if (mutex_lock_interruptible(&head->io_sem))
2377 return -EINTR;
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002378 head->read_user_buf = buffer;
2379 head->read_user_buf_avail = buffer_len;
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002380 idx = tomoyo_read_lock();
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002381 if (tomoyo_flush(head))
2382 /* Call the policy handler. */
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002383 do {
2384 tomoyo_set_namespace_cursor(head);
2385 head->read(head);
2386 } while (tomoyo_flush(head) &&
2387 tomoyo_has_more_namespace(head));
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002388 tomoyo_read_unlock(idx);
Tetsuo Handaf23571e2010-06-24 14:57:16 +09002389 len = head->read_user_buf - buffer;
Kentaro Takeda95908372009-02-05 17:18:13 +09002390 mutex_unlock(&head->io_sem);
2391 return len;
2392}
2393
2394/**
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002395 * tomoyo_parse_policy - Parse a policy line.
2396 *
2397 * @head: Poiter to "struct tomoyo_io_buffer".
2398 * @line: Line to parse.
2399 *
2400 * Returns 0 on success, negative value otherwise.
2401 *
2402 * Caller holds tomoyo_read_lock().
2403 */
2404static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2405{
2406 /* Delete request? */
2407 head->w.is_delete = !strncmp(line, "delete ", 7);
2408 if (head->w.is_delete)
2409 memmove(line, line + 7, strlen(line + 7) + 1);
2410 /* Selecting namespace to update. */
2411 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2412 head->type == TOMOYO_PROFILE) {
2413 if (*line == '<') {
2414 char *cp = strchr(line, ' ');
2415 if (cp) {
2416 *cp++ = '\0';
2417 head->w.ns = tomoyo_assign_namespace(line);
2418 memmove(line, cp, strlen(cp) + 1);
2419 } else
2420 head->w.ns = NULL;
2421 } else
2422 head->w.ns = &tomoyo_kernel_namespace;
2423 /* Don't allow updating if namespace is invalid. */
2424 if (!head->w.ns)
2425 return -ENOENT;
2426 }
2427 /* Do the update. */
2428 return head->write(head);
2429}
2430
2431/**
Kentaro Takeda95908372009-02-05 17:18:13 +09002432 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2433 *
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002434 * @head: Pointer to "struct tomoyo_io_buffer".
Kentaro Takeda95908372009-02-05 17:18:13 +09002435 * @buffer: Pointer to buffer to read from.
2436 * @buffer_len: Size of @buffer.
2437 *
2438 * Returns @buffer_len on success, negative value otherwise.
2439 */
Tetsuo Handa2c47ab92011-06-26 23:21:19 +09002440ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2441 const char __user *buffer, const int buffer_len)
Kentaro Takeda95908372009-02-05 17:18:13 +09002442{
Kentaro Takeda95908372009-02-05 17:18:13 +09002443 int error = buffer_len;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002444 size_t avail_len = buffer_len;
Kentaro Takeda95908372009-02-05 17:18:13 +09002445 char *cp0 = head->write_buf;
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002446 int idx;
Kentaro Takeda95908372009-02-05 17:18:13 +09002447 if (!head->write)
2448 return -ENOSYS;
2449 if (!access_ok(VERIFY_READ, buffer, buffer_len))
2450 return -EFAULT;
Kentaro Takeda95908372009-02-05 17:18:13 +09002451 if (mutex_lock_interruptible(&head->io_sem))
2452 return -EINTR;
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002453 idx = tomoyo_read_lock();
Kentaro Takeda95908372009-02-05 17:18:13 +09002454 /* Read a line and dispatch it to the policy handler. */
2455 while (avail_len > 0) {
2456 char c;
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002457 if (head->w.avail >= head->writebuf_size - 1) {
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002458 const int len = head->writebuf_size * 2;
2459 char *cp = kzalloc(len, GFP_NOFS);
2460 if (!cp) {
2461 error = -ENOMEM;
2462 break;
2463 }
2464 memmove(cp, cp0, head->w.avail);
2465 kfree(cp0);
2466 head->write_buf = cp;
2467 cp0 = cp;
2468 head->writebuf_size = len;
2469 }
2470 if (get_user(c, buffer)) {
Kentaro Takeda95908372009-02-05 17:18:13 +09002471 error = -EFAULT;
2472 break;
2473 }
2474 buffer++;
2475 avail_len--;
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002476 cp0[head->w.avail++] = c;
Kentaro Takeda95908372009-02-05 17:18:13 +09002477 if (c != '\n')
2478 continue;
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002479 cp0[head->w.avail - 1] = '\0';
2480 head->w.avail = 0;
Kentaro Takeda95908372009-02-05 17:18:13 +09002481 tomoyo_normalize_line(cp0);
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002482 if (!strcmp(cp0, "reset")) {
2483 head->w.ns = &tomoyo_kernel_namespace;
2484 head->w.domain = NULL;
2485 memset(&head->r, 0, sizeof(head->r));
2486 continue;
2487 }
2488 /* Don't allow updating policies by non manager programs. */
2489 switch (head->type) {
2490 case TOMOYO_PROCESS_STATUS:
2491 /* This does not write anything. */
2492 break;
2493 case TOMOYO_DOMAINPOLICY:
2494 if (tomoyo_select_domain(head, cp0))
2495 continue;
2496 /* fall through */
2497 case TOMOYO_EXCEPTIONPOLICY:
2498 if (!strcmp(cp0, "select transition_only")) {
2499 head->r.print_transition_related_only = true;
2500 continue;
2501 }
2502 /* fall through */
2503 default:
2504 if (!tomoyo_manager()) {
2505 error = -EPERM;
2506 goto out;
2507 }
2508 }
2509 switch (tomoyo_parse_policy(head, cp0)) {
2510 case -EPERM:
2511 error = -EPERM;
2512 goto out;
Tetsuo Handab22b8b92011-06-26 23:21:50 +09002513 case 0:
2514 switch (head->type) {
2515 case TOMOYO_DOMAINPOLICY:
2516 case TOMOYO_EXCEPTIONPOLICY:
Tetsuo Handab22b8b92011-06-26 23:21:50 +09002517 case TOMOYO_STAT:
2518 case TOMOYO_PROFILE:
2519 case TOMOYO_MANAGER:
2520 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2521 break;
2522 default:
2523 break;
2524 }
2525 break;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002526 }
Kentaro Takeda95908372009-02-05 17:18:13 +09002527 }
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002528out:
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002529 tomoyo_read_unlock(idx);
Kentaro Takeda95908372009-02-05 17:18:13 +09002530 mutex_unlock(&head->io_sem);
2531 return error;
2532}
2533
2534/**
2535 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2536 *
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002537 * @head: Pointer to "struct tomoyo_io_buffer".
Kentaro Takeda95908372009-02-05 17:18:13 +09002538 *
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002539 * Returns 0.
Kentaro Takeda95908372009-02-05 17:18:13 +09002540 */
Tetsuo Handa0df7e8b2011-06-26 23:16:36 +09002541int tomoyo_close_control(struct tomoyo_io_buffer *head)
Kentaro Takeda95908372009-02-05 17:18:13 +09002542{
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09002543 /*
2544 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2545 * observer counter.
2546 */
Tetsuo Handa2e503bb2011-06-26 23:20:55 +09002547 if (head->type == TOMOYO_QUERY &&
2548 atomic_dec_and_test(&tomoyo_query_observers))
2549 wake_up_all(&tomoyo_answer_wait);
2550 tomoyo_notify_gc(head, false);
Kentaro Takeda95908372009-02-05 17:18:13 +09002551 return 0;
2552}
2553
2554/**
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002555 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
Kentaro Takeda95908372009-02-05 17:18:13 +09002556 */
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002557void tomoyo_check_profile(void)
Kentaro Takeda95908372009-02-05 17:18:13 +09002558{
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002559 struct tomoyo_domain_info *domain;
2560 const int idx = tomoyo_read_lock();
2561 tomoyo_policy_loaded = true;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002562 printk(KERN_INFO "TOMOYO: 2.4.0\n");
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002563 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
2564 const u8 profile = domain->profile;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002565 const struct tomoyo_policy_namespace *ns = domain->ns;
2566 if (ns->profile_version != 20100903)
2567 printk(KERN_ERR
2568 "Profile version %u is not supported.\n",
2569 ns->profile_version);
2570 else if (!ns->profile_ptr[profile])
2571 printk(KERN_ERR
2572 "Profile %u (used by '%s') is not defined.\n",
2573 profile, domain->domainname->name);
2574 else
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002575 continue;
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002576 printk(KERN_ERR
2577 "Userland tools for TOMOYO 2.4 must be installed and "
2578 "policy must be initialized.\n");
2579 printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.4/ "
Tetsuo Handa9f1c1d42010-10-08 14:43:22 +09002580 "for more information.\n");
Tetsuo Handabd03a3e2011-06-26 23:19:52 +09002581 panic("STOP!");
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002582 }
2583 tomoyo_read_unlock(idx);
Tetsuo Handac3ef1502010-05-17 10:12:46 +09002584 printk(KERN_INFO "Mandatory Access Control activated.\n");
Kentaro Takeda95908372009-02-05 17:18:13 +09002585}
Tetsuo Handaefe836a2011-06-26 23:22:18 +09002586
2587/**
2588 * tomoyo_load_builtin_policy - Load built-in policy.
2589 *
2590 * Returns nothing.
2591 */
2592void __init tomoyo_load_builtin_policy(void)
2593{
2594 /*
2595 * This include file is manually created and contains built-in policy
2596 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2597 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2598 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2599 */
2600#include "builtin-policy.h"
2601 u8 i;
2602 const int idx = tomoyo_read_lock();
2603 for (i = 0; i < 5; i++) {
2604 struct tomoyo_io_buffer head = { };
2605 char *start = "";
2606 switch (i) {
2607 case 0:
2608 start = tomoyo_builtin_profile;
2609 head.type = TOMOYO_PROFILE;
2610 head.write = tomoyo_write_profile;
2611 break;
2612 case 1:
2613 start = tomoyo_builtin_exception_policy;
2614 head.type = TOMOYO_EXCEPTIONPOLICY;
2615 head.write = tomoyo_write_exception;
2616 break;
2617 case 2:
2618 start = tomoyo_builtin_domain_policy;
2619 head.type = TOMOYO_DOMAINPOLICY;
2620 head.write = tomoyo_write_domain;
2621 break;
2622 case 3:
2623 start = tomoyo_builtin_manager;
2624 head.type = TOMOYO_MANAGER;
2625 head.write = tomoyo_write_manager;
2626 break;
2627 case 4:
2628 start = tomoyo_builtin_stat;
2629 head.type = TOMOYO_STAT;
2630 head.write = tomoyo_write_stat;
2631 break;
2632 }
2633 while (1) {
2634 char *end = strchr(start, '\n');
2635 if (!end)
2636 break;
2637 *end = '\0';
2638 tomoyo_normalize_line(start);
2639 head.write_buf = start;
2640 tomoyo_parse_policy(&head, start);
2641 start = end + 1;
2642 }
2643 }
2644 tomoyo_read_unlock(idx);
Tetsuo Handa0e4ae0e2011-06-26 23:22:59 +09002645#ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2646 tomoyo_check_profile();
2647#endif
Tetsuo Handaefe836a2011-06-26 23:22:18 +09002648}