blob: 9d32f182301ee6cfcfdb4d18508a7b9773f275eb [file] [log] [blame]
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001/*
2 * security/tomoyo/file.c
3 *
Tetsuo Handac3ef1502010-05-17 10:12:46 +09004 * Pathname restriction functions.
Kentaro Takedab69a54e2009-02-05 17:18:14 +09005 *
Tetsuo Handac3ef1502010-05-17 10:12:46 +09006 * Copyright (C) 2005-2010 NTT DATA CORPORATION
Kentaro Takedab69a54e2009-02-05 17:18:14 +09007 */
8
9#include "common.h"
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Kentaro Takedab69a54e2009-02-05 17:18:14 +090011
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090012/* Keyword array for operations with one pathname. */
Tetsuo Handa71c28232010-06-16 16:26:38 +090013const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
Tetsuo Handa7ef61232010-02-16 08:03:30 +090014 [TOMOYO_TYPE_READ_WRITE] = "read/write",
15 [TOMOYO_TYPE_EXECUTE] = "execute",
16 [TOMOYO_TYPE_READ] = "read",
17 [TOMOYO_TYPE_WRITE] = "write",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090018 [TOMOYO_TYPE_UNLINK] = "unlink",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090019 [TOMOYO_TYPE_RMDIR] = "rmdir",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090020 [TOMOYO_TYPE_TRUNCATE] = "truncate",
21 [TOMOYO_TYPE_SYMLINK] = "symlink",
22 [TOMOYO_TYPE_REWRITE] = "rewrite",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090023 [TOMOYO_TYPE_CHROOT] = "chroot",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090024 [TOMOYO_TYPE_UMOUNT] = "unmount",
Kentaro Takedab69a54e2009-02-05 17:18:14 +090025};
26
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090027/* Keyword array for operations with one pathname and three numbers. */
Tetsuo Handa71c28232010-06-16 16:26:38 +090028const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION] = {
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090029 [TOMOYO_TYPE_MKBLOCK] = "mkblock",
30 [TOMOYO_TYPE_MKCHAR] = "mkchar",
31};
32
33/* Keyword array for operations with two pathnames. */
Tetsuo Handa71c28232010-06-16 16:26:38 +090034const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = {
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090035 [TOMOYO_TYPE_LINK] = "link",
36 [TOMOYO_TYPE_RENAME] = "rename",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090037 [TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root",
Kentaro Takedab69a54e2009-02-05 17:18:14 +090038};
39
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090040/* Keyword array for operations with one pathname and one number. */
Tetsuo Handa71c28232010-06-16 16:26:38 +090041const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +090042 [TOMOYO_TYPE_CREATE] = "create",
43 [TOMOYO_TYPE_MKDIR] = "mkdir",
44 [TOMOYO_TYPE_MKFIFO] = "mkfifo",
45 [TOMOYO_TYPE_MKSOCK] = "mksock",
46 [TOMOYO_TYPE_IOCTL] = "ioctl",
47 [TOMOYO_TYPE_CHMOD] = "chmod",
48 [TOMOYO_TYPE_CHOWN] = "chown",
49 [TOMOYO_TYPE_CHGRP] = "chgrp",
50};
51
Tetsuo Handa57c25902010-06-03 20:38:44 +090052static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = {
53 [TOMOYO_TYPE_READ_WRITE] = TOMOYO_MAC_FILE_OPEN,
54 [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE,
55 [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN,
56 [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN,
57 [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK,
58 [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR,
59 [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE,
60 [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK,
61 [TOMOYO_TYPE_REWRITE] = TOMOYO_MAC_FILE_REWRITE,
62 [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT,
63 [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT,
64};
65
Tetsuo Handa75093152010-06-16 16:23:55 +090066static const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = {
Tetsuo Handa57c25902010-06-03 20:38:44 +090067 [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK,
68 [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR,
69};
70
71static const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = {
72 [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK,
73 [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME,
74 [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT,
75};
76
77static const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
78 [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE,
79 [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR,
80 [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO,
81 [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK,
82 [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL,
83 [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD,
84 [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN,
85 [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP,
86};
87
Tetsuo Handa7762fbf2010-05-10 17:30:26 +090088void tomoyo_put_name_union(struct tomoyo_name_union *ptr)
89{
90 if (!ptr)
91 return;
92 if (ptr->is_group)
Tetsuo Handaa98aa4d2010-06-17 16:52:29 +090093 tomoyo_put_group(ptr->group);
Tetsuo Handa7762fbf2010-05-10 17:30:26 +090094 else
95 tomoyo_put_name(ptr->filename);
96}
97
Tetsuo Handa484ca792010-07-29 14:29:55 +090098const struct tomoyo_path_info *
99tomoyo_compare_name_union(const struct tomoyo_path_info *name,
100 const struct tomoyo_name_union *ptr)
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900101{
102 if (ptr->is_group)
Tetsuo Handa3f629632010-06-03 20:37:26 +0900103 return tomoyo_path_matches_group(name, ptr->group);
Tetsuo Handa484ca792010-07-29 14:29:55 +0900104 if (tomoyo_path_matches_pattern(name, ptr->filename))
105 return ptr->filename;
106 return NULL;
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900107}
108
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900109void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
110{
111 if (ptr && ptr->is_group)
Tetsuo Handaa98aa4d2010-06-17 16:52:29 +0900112 tomoyo_put_group(ptr->group);
Tetsuo Handa4c3e9e22010-05-17 10:06:58 +0900113}
114
115bool tomoyo_compare_number_union(const unsigned long value,
116 const struct tomoyo_number_union *ptr)
117{
118 if (ptr->is_group)
119 return tomoyo_number_matches_group(value, value, ptr->group);
120 return value >= ptr->values[0] && value <= ptr->values[1];
121}
122
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900123static void tomoyo_add_slash(struct tomoyo_path_info *buf)
124{
125 if (buf->is_dir)
126 return;
127 /*
128 * This is OK because tomoyo_encode() reserves space for appending "/".
129 */
130 strcat((char *) buf->name, "/");
131 tomoyo_fill_path_info(buf);
132}
133
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900134/**
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900135 * tomoyo_strendswith - Check whether the token ends with the given token.
136 *
137 * @name: The token to check.
138 * @tail: The token to find.
139 *
140 * Returns true if @name ends with @tail, false otherwise.
141 */
142static bool tomoyo_strendswith(const char *name, const char *tail)
143{
144 int len;
145
146 if (!name || !tail)
147 return false;
148 len = strlen(name) - strlen(tail);
149 return len >= 0 && !strcmp(name + len, tail);
150}
151
152/**
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900153 * tomoyo_get_realpath - Get realpath.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900154 *
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900155 * @buf: Pointer to "struct tomoyo_path_info".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900156 * @path: Pointer to "struct path".
157 *
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900158 * Returns true on success, false otherwise.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900159 */
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900160static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900161{
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900162 buf->name = tomoyo_realpath_from_path(path);
163 if (buf->name) {
164 tomoyo_fill_path_info(buf);
165 return true;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900166 }
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900167 return false;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900168}
169
Tetsuo Handa99a85252010-06-16 16:22:51 +0900170/**
171 * tomoyo_audit_path_log - Audit path request log.
172 *
173 * @r: Pointer to "struct tomoyo_request_info".
174 *
175 * Returns 0 on success, negative value otherwise.
176 */
177static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
178{
179 const char *operation = tomoyo_path_keyword[r->param.path.operation];
180 const struct tomoyo_path_info *filename = r->param.path.filename;
181 if (r->granted)
182 return 0;
183 tomoyo_warn_log(r, "%s %s", operation, filename->name);
184 return tomoyo_supervisor(r, "allow_%s %s\n", operation,
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900185 tomoyo_pattern(filename));
Tetsuo Handa99a85252010-06-16 16:22:51 +0900186}
187
188/**
189 * tomoyo_audit_path2_log - Audit path/path request log.
190 *
191 * @r: Pointer to "struct tomoyo_request_info".
192 *
193 * Returns 0 on success, negative value otherwise.
194 */
195static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
196{
197 const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
198 const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
199 const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
200 if (r->granted)
201 return 0;
202 tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
203 filename2->name);
204 return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900205 tomoyo_pattern(filename1),
206 tomoyo_pattern(filename2));
Tetsuo Handa99a85252010-06-16 16:22:51 +0900207}
208
209/**
210 * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
211 *
212 * @r: Pointer to "struct tomoyo_request_info".
213 *
214 * Returns 0 on success, negative value otherwise.
215 */
216static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
217{
Tetsuo Handa71c28232010-06-16 16:26:38 +0900218 const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
Tetsuo Handa99a85252010-06-16 16:22:51 +0900219 const struct tomoyo_path_info *filename = r->param.mkdev.filename;
220 const unsigned int major = r->param.mkdev.major;
221 const unsigned int minor = r->param.mkdev.minor;
222 const unsigned int mode = r->param.mkdev.mode;
223 if (r->granted)
224 return 0;
225 tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
226 major, minor);
227 return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation,
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900228 tomoyo_pattern(filename), mode, major, minor);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900229}
230
231/**
232 * tomoyo_audit_path_number_log - Audit path/number request log.
233 *
234 * @r: Pointer to "struct tomoyo_request_info".
235 * @error: Error code.
236 *
237 * Returns 0 on success, negative value otherwise.
238 */
239static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
240{
241 const u8 type = r->param.path_number.operation;
242 u8 radix;
243 const struct tomoyo_path_info *filename = r->param.path_number.filename;
244 const char *operation = tomoyo_path_number_keyword[type];
245 char buffer[64];
246 if (r->granted)
247 return 0;
248 switch (type) {
249 case TOMOYO_TYPE_CREATE:
250 case TOMOYO_TYPE_MKDIR:
251 case TOMOYO_TYPE_MKFIFO:
252 case TOMOYO_TYPE_MKSOCK:
253 case TOMOYO_TYPE_CHMOD:
254 radix = TOMOYO_VALUE_TYPE_OCTAL;
255 break;
256 case TOMOYO_TYPE_IOCTL:
257 radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
258 break;
259 default:
260 radix = TOMOYO_VALUE_TYPE_DECIMAL;
261 break;
262 }
263 tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
264 radix);
265 tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
266 return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900267 tomoyo_pattern(filename), buffer);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900268}
269
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900270static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a,
271 const struct tomoyo_acl_head *b)
272{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900273 return container_of(a, struct tomoyo_readable_file,
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900274 head)->filename ==
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900275 container_of(b, struct tomoyo_readable_file,
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900276 head)->filename;
277}
278
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900279/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900280 * tomoyo_update_globally_readable_entry - Update "struct tomoyo_readable_file" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900281 *
282 * @filename: Filename unconditionally permitted to open() for reading.
283 * @is_delete: True if it is a delete request.
284 *
285 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900286 *
287 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900288 */
289static int tomoyo_update_globally_readable_entry(const char *filename,
290 const bool is_delete)
291{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900292 struct tomoyo_readable_file e = { };
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900293 int error;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900294
Tetsuo Handa75093152010-06-16 16:23:55 +0900295 if (!tomoyo_correct_word(filename))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900296 return -EINVAL;
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900297 e.filename = tomoyo_get_name(filename);
298 if (!e.filename)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900299 return -ENOMEM;
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900300 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900301 &tomoyo_policy_list
302 [TOMOYO_ID_GLOBALLY_READABLE],
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900303 tomoyo_same_globally_readable);
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900304 tomoyo_put_name(e.filename);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900305 return error;
306}
307
308/**
Tetsuo Handa75093152010-06-16 16:23:55 +0900309 * tomoyo_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900310 *
311 * @filename: The filename to check.
312 *
313 * Returns true if any domain can open @filename for reading, false otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900314 *
315 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900316 */
Tetsuo Handa75093152010-06-16 16:23:55 +0900317static bool tomoyo_globally_readable_file(const struct tomoyo_path_info *
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900318 filename)
319{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900320 struct tomoyo_readable_file *ptr;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900321 bool found = false;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900322
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900323 list_for_each_entry_rcu(ptr, &tomoyo_policy_list
324 [TOMOYO_ID_GLOBALLY_READABLE], head.list) {
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900325 if (!ptr->head.is_deleted &&
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900326 tomoyo_path_matches_pattern(filename, ptr->filename)) {
327 found = true;
328 break;
329 }
330 }
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900331 return found;
332}
333
334/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900335 * tomoyo_write_globally_readable - Write "struct tomoyo_readable_file" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900336 *
337 * @data: String to parse.
338 * @is_delete: True if it is a delete request.
339 *
340 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900341 *
342 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900343 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900344int tomoyo_write_globally_readable(char *data, const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900345{
346 return tomoyo_update_globally_readable_entry(data, is_delete);
347}
348
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900349static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a,
350 const struct tomoyo_acl_head *b)
351{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900352 return container_of(a, struct tomoyo_no_pattern, head)->pattern ==
353 container_of(b, struct tomoyo_no_pattern, head)->pattern;
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900354}
355
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900356/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900357 * tomoyo_update_file_pattern_entry - Update "struct tomoyo_no_pattern" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900358 *
359 * @pattern: Pathname pattern.
360 * @is_delete: True if it is a delete request.
361 *
362 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900363 *
364 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900365 */
366static int tomoyo_update_file_pattern_entry(const char *pattern,
367 const bool is_delete)
368{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900369 struct tomoyo_no_pattern e = { };
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900370 int error;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900371
Tetsuo Handa75093152010-06-16 16:23:55 +0900372 if (!tomoyo_correct_word(pattern))
Tetsuo Handa3f629632010-06-03 20:37:26 +0900373 return -EINVAL;
374 e.pattern = tomoyo_get_name(pattern);
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900375 if (!e.pattern)
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900376 return -ENOMEM;
377 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900378 &tomoyo_policy_list[TOMOYO_ID_PATTERN],
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900379 tomoyo_same_pattern);
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900380 tomoyo_put_name(e.pattern);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900381 return error;
382}
383
384/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900385 * tomoyo_pattern - Get patterned pathname.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900386 *
387 * @filename: The filename to find patterned pathname.
388 *
389 * Returns pointer to pathname pattern if matched, @filename otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900390 *
391 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900392 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900393const char *tomoyo_pattern(const struct tomoyo_path_info *filename)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900394{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900395 struct tomoyo_no_pattern *ptr;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900396 const struct tomoyo_path_info *pattern = NULL;
397
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900398 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_PATTERN],
399 head.list) {
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900400 if (ptr->head.is_deleted)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900401 continue;
402 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
403 continue;
404 pattern = ptr->pattern;
405 if (tomoyo_strendswith(pattern->name, "/\\*")) {
406 /* Do nothing. Try to find the better match. */
407 } else {
408 /* This would be the better match. Use this. */
409 break;
410 }
411 }
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900412 if (pattern)
413 filename = pattern;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +0900414 return filename->name;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900415}
416
417/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900418 * tomoyo_write_pattern - Write "struct tomoyo_no_pattern" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900419 *
420 * @data: String to parse.
421 * @is_delete: True if it is a delete request.
422 *
423 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900424 *
425 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900426 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900427int tomoyo_write_pattern(char *data, const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900428{
429 return tomoyo_update_file_pattern_entry(data, is_delete);
430}
431
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900432static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a,
433 const struct tomoyo_acl_head *b)
434{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900435 return container_of(a, struct tomoyo_no_rewrite, head)->pattern
436 == container_of(b, struct tomoyo_no_rewrite, head)
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900437 ->pattern;
438}
439
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900440/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900441 * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900442 *
443 * @pattern: Pathname pattern that are not rewritable by default.
444 * @is_delete: True if it is a delete request.
445 *
446 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900447 *
448 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900449 */
450static int tomoyo_update_no_rewrite_entry(const char *pattern,
451 const bool is_delete)
452{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900453 struct tomoyo_no_rewrite e = { };
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900454 int error;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900455
Tetsuo Handa75093152010-06-16 16:23:55 +0900456 if (!tomoyo_correct_word(pattern))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900457 return -EINVAL;
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900458 e.pattern = tomoyo_get_name(pattern);
459 if (!e.pattern)
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900460 return -ENOMEM;
461 error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900462 &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
Tetsuo Handa36f5e1f2010-06-15 09:23:26 +0900463 tomoyo_same_no_rewrite);
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900464 tomoyo_put_name(e.pattern);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900465 return error;
466}
467
468/**
Tetsuo Handa75093152010-06-16 16:23:55 +0900469 * tomoyo_no_rewrite_file - Check if the given pathname is not permitted to be rewrited.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900470 *
471 * @filename: Filename to check.
472 *
473 * Returns true if @filename is specified by "deny_rewrite" directive,
474 * false otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900475 *
476 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900477 */
Tetsuo Handa75093152010-06-16 16:23:55 +0900478static bool tomoyo_no_rewrite_file(const struct tomoyo_path_info *filename)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900479{
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900480 struct tomoyo_no_rewrite *ptr;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900481 bool found = false;
482
Tetsuo Handaa230f9e2010-06-17 16:53:24 +0900483 list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE],
484 head.list) {
Tetsuo Handa82e0f002010-06-15 09:22:42 +0900485 if (ptr->head.is_deleted)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900486 continue;
487 if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
488 continue;
489 found = true;
490 break;
491 }
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900492 return found;
493}
494
495/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900496 * tomoyo_write_no_rewrite - Write "struct tomoyo_no_rewrite" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900497 *
498 * @data: String to parse.
499 * @is_delete: True if it is a delete request.
500 *
501 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900502 *
503 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900504 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900505int tomoyo_write_no_rewrite(char *data, const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900506{
507 return tomoyo_update_no_rewrite_entry(data, is_delete);
508}
509
Tetsuo Handa484ca792010-07-29 14:29:55 +0900510static bool tomoyo_check_path_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900511 const struct tomoyo_acl_info *ptr)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900512{
Tetsuo Handa99a85252010-06-16 16:22:51 +0900513 const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
514 head);
Tetsuo Handa484ca792010-07-29 14:29:55 +0900515 if (acl->perm & (1 << r->param.path.operation)) {
516 r->param.path.matched_path =
517 tomoyo_compare_name_union(r->param.path.filename,
518 &acl->name);
519 return r->param.path.matched_path != NULL;
520 }
521 return false;
Tetsuo Handa99a85252010-06-16 16:22:51 +0900522}
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900523
Tetsuo Handa484ca792010-07-29 14:29:55 +0900524static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900525 const struct tomoyo_acl_info *ptr)
526{
527 const struct tomoyo_path_number_acl *acl =
528 container_of(ptr, typeof(*acl), head);
529 return (acl->perm & (1 << r->param.path_number.operation)) &&
530 tomoyo_compare_number_union(r->param.path_number.number,
531 &acl->number) &&
532 tomoyo_compare_name_union(r->param.path_number.filename,
533 &acl->name);
534}
535
Tetsuo Handa484ca792010-07-29 14:29:55 +0900536static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900537 const struct tomoyo_acl_info *ptr)
538{
539 const struct tomoyo_path2_acl *acl =
540 container_of(ptr, typeof(*acl), head);
541 return (acl->perm & (1 << r->param.path2.operation)) &&
542 tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
543 && tomoyo_compare_name_union(r->param.path2.filename2,
544 &acl->name2);
545}
546
Tetsuo Handa484ca792010-07-29 14:29:55 +0900547static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900548 const struct tomoyo_acl_info *ptr)
549{
Tetsuo Handa75093152010-06-16 16:23:55 +0900550 const struct tomoyo_mkdev_acl *acl =
Tetsuo Handa99a85252010-06-16 16:22:51 +0900551 container_of(ptr, typeof(*acl), head);
552 return (acl->perm & (1 << r->param.mkdev.operation)) &&
553 tomoyo_compare_number_union(r->param.mkdev.mode,
554 &acl->mode) &&
555 tomoyo_compare_number_union(r->param.mkdev.major,
556 &acl->major) &&
557 tomoyo_compare_number_union(r->param.mkdev.minor,
558 &acl->minor) &&
559 tomoyo_compare_name_union(r->param.mkdev.filename,
560 &acl->name);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900561}
562
Tetsuo Handa237ab452010-06-12 20:46:22 +0900563static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
564 const struct tomoyo_acl_info *b)
565{
566 const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head);
567 const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900568 return tomoyo_same_acl_head(&p1->head, &p2->head) &&
569 tomoyo_same_name_union(&p1->name, &p2->name);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900570}
571
572static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a,
573 struct tomoyo_acl_info *b,
574 const bool is_delete)
575{
576 u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head)
577 ->perm;
578 u16 perm = *a_perm;
579 const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm;
580 if (is_delete) {
581 perm &= ~b_perm;
582 if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK)
583 perm &= ~(1 << TOMOYO_TYPE_READ_WRITE);
584 else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE)))
585 perm &= ~TOMOYO_RW_MASK;
586 } else {
587 perm |= b_perm;
588 if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK)
589 perm |= (1 << TOMOYO_TYPE_READ_WRITE);
590 else if (perm & (1 << TOMOYO_TYPE_READ_WRITE))
591 perm |= TOMOYO_RW_MASK;
592 }
593 *a_perm = perm;
594 return !perm;
595}
596
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900597/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900598 * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900599 *
600 * @type: Type of operation.
601 * @filename: Filename.
602 * @domain: Pointer to "struct tomoyo_domain_info".
603 * @is_delete: True if it is a delete request.
604 *
605 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900606 *
607 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900608 */
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900609static int tomoyo_update_path_acl(const u8 type, const char *filename,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900610 struct tomoyo_domain_info * const domain,
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900611 const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900612{
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900613 struct tomoyo_path_acl e = {
614 .head.type = TOMOYO_TYPE_PATH_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900615 .perm = 1 << type
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900616 };
Tetsuo Handa237ab452010-06-12 20:46:22 +0900617 int error;
618 if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE))
619 e.perm |= TOMOYO_RW_MASK;
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900620 if (!tomoyo_parse_name_union(filename, &e.name))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900621 return -EINVAL;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900622 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
623 tomoyo_same_path_acl,
624 tomoyo_merge_path_acl);
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900625 tomoyo_put_name_union(&e.name);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900626 return error;
627}
628
Tetsuo Handa75093152010-06-16 16:23:55 +0900629static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900630 const struct tomoyo_acl_info *b)
631{
Tetsuo Handa75093152010-06-16 16:23:55 +0900632 const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1),
Tetsuo Handa237ab452010-06-12 20:46:22 +0900633 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900634 const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2),
Tetsuo Handa237ab452010-06-12 20:46:22 +0900635 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900636 return tomoyo_same_acl_head(&p1->head, &p2->head)
637 && tomoyo_same_name_union(&p1->name, &p2->name)
638 && tomoyo_same_number_union(&p1->mode, &p2->mode)
639 && tomoyo_same_number_union(&p1->major, &p2->major)
640 && tomoyo_same_number_union(&p1->minor, &p2->minor);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900641}
642
Tetsuo Handa75093152010-06-16 16:23:55 +0900643static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900644 struct tomoyo_acl_info *b,
645 const bool is_delete)
646{
Tetsuo Handa75093152010-06-16 16:23:55 +0900647 u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900648 head)->perm;
649 u8 perm = *a_perm;
Tetsuo Handa75093152010-06-16 16:23:55 +0900650 const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head)
Tetsuo Handa237ab452010-06-12 20:46:22 +0900651 ->perm;
652 if (is_delete)
653 perm &= ~b_perm;
654 else
655 perm |= b_perm;
656 *a_perm = perm;
657 return !perm;
658}
659
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900660/**
Tetsuo Handa75093152010-06-16 16:23:55 +0900661 * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900662 *
663 * @type: Type of operation.
664 * @filename: Filename.
665 * @mode: Create mode.
666 * @major: Device major number.
667 * @minor: Device minor number.
668 * @domain: Pointer to "struct tomoyo_domain_info".
669 * @is_delete: True if it is a delete request.
670 *
671 * Returns 0 on success, negative value otherwise.
Tetsuo Handa237ab452010-06-12 20:46:22 +0900672 *
673 * Caller holds tomoyo_read_lock().
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900674 */
Tetsuo Handa75093152010-06-16 16:23:55 +0900675static int tomoyo_update_mkdev_acl(const u8 type, const char *filename,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900676 char *mode, char *major, char *minor,
677 struct tomoyo_domain_info * const
678 domain, const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900679{
Tetsuo Handa75093152010-06-16 16:23:55 +0900680 struct tomoyo_mkdev_acl e = {
681 .head.type = TOMOYO_TYPE_MKDEV_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900682 .perm = 1 << type
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900683 };
684 int error = is_delete ? -ENOENT : -ENOMEM;
685 if (!tomoyo_parse_name_union(filename, &e.name) ||
686 !tomoyo_parse_number_union(mode, &e.mode) ||
687 !tomoyo_parse_number_union(major, &e.major) ||
688 !tomoyo_parse_number_union(minor, &e.minor))
689 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900690 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
Tetsuo Handa75093152010-06-16 16:23:55 +0900691 tomoyo_same_mkdev_acl,
692 tomoyo_merge_mkdev_acl);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900693 out:
694 tomoyo_put_name_union(&e.name);
695 tomoyo_put_number_union(&e.mode);
696 tomoyo_put_number_union(&e.major);
697 tomoyo_put_number_union(&e.minor);
698 return error;
699}
700
Tetsuo Handa237ab452010-06-12 20:46:22 +0900701static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a,
702 const struct tomoyo_acl_info *b)
703{
704 const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head);
705 const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900706 return tomoyo_same_acl_head(&p1->head, &p2->head)
707 && tomoyo_same_name_union(&p1->name1, &p2->name1)
708 && tomoyo_same_name_union(&p1->name2, &p2->name2);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900709}
710
711static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a,
712 struct tomoyo_acl_info *b,
713 const bool is_delete)
714{
715 u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head)
716 ->perm;
717 u8 perm = *a_perm;
718 const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm;
719 if (is_delete)
720 perm &= ~b_perm;
721 else
722 perm |= b_perm;
723 *a_perm = perm;
724 return !perm;
725}
726
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900727/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900728 * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900729 *
730 * @type: Type of operation.
731 * @filename1: First filename.
732 * @filename2: Second filename.
733 * @domain: Pointer to "struct tomoyo_domain_info".
734 * @is_delete: True if it is a delete request.
735 *
736 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900737 *
738 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900739 */
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900740static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
741 const char *filename2,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900742 struct tomoyo_domain_info * const domain,
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900743 const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900744{
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900745 struct tomoyo_path2_acl e = {
746 .head.type = TOMOYO_TYPE_PATH2_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900747 .perm = 1 << type
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900748 };
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900749 int error = is_delete ? -ENOENT : -ENOMEM;
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900750 if (!tomoyo_parse_name_union(filename1, &e.name1) ||
751 !tomoyo_parse_name_union(filename2, &e.name2))
Tetsuo Handaca0b7df2010-02-07 20:23:59 +0900752 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900753 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
754 tomoyo_same_path2_acl,
755 tomoyo_merge_path2_acl);
Tetsuo Handaca0b7df2010-02-07 20:23:59 +0900756 out:
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900757 tomoyo_put_name_union(&e.name1);
758 tomoyo_put_name_union(&e.name2);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900759 return error;
760}
761
762/**
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900763 * tomoyo_path_permission - Check permission for single path operation.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900764 *
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900765 * @r: Pointer to "struct tomoyo_request_info".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900766 * @operation: Type of operation.
767 * @filename: Filename to check.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900768 *
769 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900770 *
771 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900772 */
Tetsuo Handa05336de2010-06-16 16:20:24 +0900773int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
774 const struct tomoyo_path_info *filename)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900775{
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900776 int error;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900777
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900778 next:
Tetsuo Handa57c25902010-06-03 20:38:44 +0900779 r->type = tomoyo_p2mac[operation];
780 r->mode = tomoyo_get_mode(r->profile, r->type);
781 if (r->mode == TOMOYO_CONFIG_DISABLED)
782 return 0;
Tetsuo Handacf6e9a62010-06-16 16:21:36 +0900783 r->param_type = TOMOYO_TYPE_PATH_ACL;
784 r->param.path.filename = filename;
785 r->param.path.operation = operation;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +0900786 do {
Tetsuo Handa99a85252010-06-16 16:22:51 +0900787 tomoyo_check_acl(r, tomoyo_check_path_acl);
788 if (!r->granted && operation == TOMOYO_TYPE_READ &&
Tetsuo Handa05336de2010-06-16 16:20:24 +0900789 !r->domain->ignore_global_allow_read &&
Tetsuo Handa75093152010-06-16 16:23:55 +0900790 tomoyo_globally_readable_file(filename))
Tetsuo Handa99a85252010-06-16 16:22:51 +0900791 r->granted = true;
792 error = tomoyo_audit_path_log(r);
Tetsuo Handa05336de2010-06-16 16:20:24 +0900793 /*
794 * Do not retry for execute request, for alias may have
795 * changed.
796 */
797 } while (error == TOMOYO_RETRY_REQUEST &&
798 operation != TOMOYO_TYPE_EXECUTE);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900799 /*
800 * Since "allow_truncate" doesn't imply "allow_rewrite" permission,
801 * we need to check "allow_rewrite" permission if the filename is
802 * specified by "deny_rewrite" keyword.
803 */
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900804 if (!error && operation == TOMOYO_TYPE_TRUNCATE &&
Tetsuo Handa75093152010-06-16 16:23:55 +0900805 tomoyo_no_rewrite_file(filename)) {
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900806 operation = TOMOYO_TYPE_REWRITE;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900807 goto next;
808 }
809 return error;
810}
811
Tetsuo Handa237ab452010-06-12 20:46:22 +0900812static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
813 const struct tomoyo_acl_info *b)
814{
815 const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1),
816 head);
817 const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2),
818 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900819 return tomoyo_same_acl_head(&p1->head, &p2->head)
820 && tomoyo_same_name_union(&p1->name, &p2->name)
821 && tomoyo_same_number_union(&p1->number, &p2->number);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900822}
823
824static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a,
825 struct tomoyo_acl_info *b,
826 const bool is_delete)
827{
828 u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl,
829 head)->perm;
830 u8 perm = *a_perm;
831 const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head)
832 ->perm;
833 if (is_delete)
834 perm &= ~b_perm;
835 else
836 perm |= b_perm;
837 *a_perm = perm;
838 return !perm;
839}
840
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900841/**
842 * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
843 *
844 * @type: Type of operation.
845 * @filename: Filename.
846 * @number: Number.
847 * @domain: Pointer to "struct tomoyo_domain_info".
848 * @is_delete: True if it is a delete request.
849 *
850 * Returns 0 on success, negative value otherwise.
851 */
Tetsuo Handa237ab452010-06-12 20:46:22 +0900852static int tomoyo_update_path_number_acl(const u8 type, const char *filename,
853 char *number,
854 struct tomoyo_domain_info * const
855 domain,
856 const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900857{
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900858 struct tomoyo_path_number_acl e = {
859 .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900860 .perm = 1 << type
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900861 };
862 int error = is_delete ? -ENOENT : -ENOMEM;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900863 if (!tomoyo_parse_name_union(filename, &e.name))
864 return -EINVAL;
865 if (!tomoyo_parse_number_union(number, &e.number))
866 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900867 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
868 tomoyo_same_path_number_acl,
869 tomoyo_merge_path_number_acl);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900870 out:
871 tomoyo_put_name_union(&e.name);
872 tomoyo_put_number_union(&e.number);
873 return error;
874}
875
876/**
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900877 * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
878 *
879 * @type: Type of operation.
880 * @path: Pointer to "struct path".
881 * @number: Number.
882 *
883 * Returns 0 on success, negative value otherwise.
884 */
885int tomoyo_path_number_perm(const u8 type, struct path *path,
886 unsigned long number)
887{
888 struct tomoyo_request_info r;
889 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900890 struct tomoyo_path_info buf;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900891 int idx;
892
Tetsuo Handa57c25902010-06-03 20:38:44 +0900893 if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
894 == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900895 return 0;
896 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900897 if (!tomoyo_get_realpath(&buf, path))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900898 goto out;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900899 if (type == TOMOYO_TYPE_MKDIR)
900 tomoyo_add_slash(&buf);
Tetsuo Handacb917cf2010-06-16 16:28:21 +0900901 r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
902 r.param.path_number.operation = type;
903 r.param.path_number.filename = &buf;
904 r.param.path_number.number = number;
905 do {
906 tomoyo_check_acl(&r, tomoyo_check_path_number_acl);
907 error = tomoyo_audit_path_number_log(&r);
908 } while (error == TOMOYO_RETRY_REQUEST);
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900909 kfree(buf.name);
Tetsuo Handacb917cf2010-06-16 16:28:21 +0900910 out:
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900911 tomoyo_read_unlock(idx);
912 if (r.mode != TOMOYO_CONFIG_ENFORCING)
913 error = 0;
914 return error;
915}
916
917/**
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900918 * tomoyo_check_open_permission - Check permission for "read" and "write".
919 *
920 * @domain: Pointer to "struct tomoyo_domain_info".
921 * @path: Pointer to "struct path".
922 * @flag: Flags for open().
923 *
924 * Returns 0 on success, negative value otherwise.
925 */
926int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
927 struct path *path, const int flag)
928{
929 const u8 acc_mode = ACC_MODE(flag);
930 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900931 struct tomoyo_path_info buf;
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900932 struct tomoyo_request_info r;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900933 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900934
Tetsuo Handa57c25902010-06-03 20:38:44 +0900935 if (!path->mnt ||
936 (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode)))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900937 return 0;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900938 buf.name = NULL;
939 r.mode = TOMOYO_CONFIG_DISABLED;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900940 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900941 if (!tomoyo_get_realpath(&buf, path))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900942 goto out;
943 error = 0;
944 /*
945 * If the filename is specified by "deny_rewrite" keyword,
946 * we need to check "allow_rewrite" permission when the filename is not
947 * opened for append mode or the filename is truncated at open time.
948 */
Tetsuo Handa57c25902010-06-03 20:38:44 +0900949 if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND)
950 && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE)
951 != TOMOYO_CONFIG_DISABLED) {
952 if (!tomoyo_get_realpath(&buf, path)) {
953 error = -ENOMEM;
954 goto out;
955 }
Tetsuo Handa75093152010-06-16 16:23:55 +0900956 if (tomoyo_no_rewrite_file(&buf))
Tetsuo Handa57c25902010-06-03 20:38:44 +0900957 error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE,
958 &buf);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900959 }
Tetsuo Handa57c25902010-06-03 20:38:44 +0900960 if (!error && acc_mode &&
961 tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN)
962 != TOMOYO_CONFIG_DISABLED) {
Tetsuo Handa05336de2010-06-16 16:20:24 +0900963 u8 operation;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900964 if (!buf.name && !tomoyo_get_realpath(&buf, path)) {
965 error = -ENOMEM;
966 goto out;
967 }
Tetsuo Handa05336de2010-06-16 16:20:24 +0900968 if (acc_mode == (MAY_READ | MAY_WRITE))
969 operation = TOMOYO_TYPE_READ_WRITE;
970 else if (acc_mode == MAY_READ)
971 operation = TOMOYO_TYPE_READ;
972 else
973 operation = TOMOYO_TYPE_WRITE;
974 error = tomoyo_path_permission(&r, operation, &buf);
Tetsuo Handa57c25902010-06-03 20:38:44 +0900975 }
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900976 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900977 kfree(buf.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900978 tomoyo_read_unlock(idx);
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900979 if (r.mode != TOMOYO_CONFIG_ENFORCING)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900980 error = 0;
981 return error;
982}
983
984/**
Tetsuo Handa2106ccd2010-05-17 10:10:31 +0900985 * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900986 *
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900987 * @operation: Type of operation.
988 * @path: Pointer to "struct path".
989 *
990 * Returns 0 on success, negative value otherwise.
991 */
Tetsuo Handa97d69312010-02-16 09:46:15 +0900992int tomoyo_path_perm(const u8 operation, struct path *path)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900993{
994 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900995 struct tomoyo_path_info buf;
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900996 struct tomoyo_request_info r;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900997 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900998
Tetsuo Handa57c25902010-06-03 20:38:44 +0900999 if (!path->mnt)
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001000 return 0;
Tetsuo Handa57c25902010-06-03 20:38:44 +09001001 if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
1002 == TOMOYO_CONFIG_DISABLED)
1003 return 0;
1004 buf.name = NULL;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001005 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001006 if (!tomoyo_get_realpath(&buf, path))
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001007 goto out;
1008 switch (operation) {
Tetsuo Handacb0abe62010-05-17 10:08:05 +09001009 case TOMOYO_TYPE_REWRITE:
Tetsuo Handa75093152010-06-16 16:23:55 +09001010 if (!tomoyo_no_rewrite_file(&buf)) {
Tetsuo Handacb0abe62010-05-17 10:08:05 +09001011 error = 0;
1012 goto out;
1013 }
1014 break;
Tetsuo Handa7ef61232010-02-16 08:03:30 +09001015 case TOMOYO_TYPE_RMDIR:
1016 case TOMOYO_TYPE_CHROOT:
Tetsuo Handa57c25902010-06-03 20:38:44 +09001017 case TOMOYO_TYPE_UMOUNT:
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001018 tomoyo_add_slash(&buf);
1019 break;
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001020 }
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001021 error = tomoyo_path_permission(&r, operation, &buf);
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001022 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001023 kfree(buf.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001024 tomoyo_read_unlock(idx);
Tetsuo Handacb0abe62010-05-17 10:08:05 +09001025 if (r.mode != TOMOYO_CONFIG_ENFORCING)
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001026 error = 0;
1027 return error;
1028}
1029
1030/**
Tetsuo Handa75093152010-06-16 16:23:55 +09001031 * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001032 *
1033 * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
1034 * @path: Pointer to "struct path".
1035 * @mode: Create mode.
1036 * @dev: Device number.
1037 *
1038 * Returns 0 on success, negative value otherwise.
1039 */
Tetsuo Handa75093152010-06-16 16:23:55 +09001040int tomoyo_mkdev_perm(const u8 operation, struct path *path,
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001041 const unsigned int mode, unsigned int dev)
1042{
1043 struct tomoyo_request_info r;
1044 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001045 struct tomoyo_path_info buf;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001046 int idx;
1047
Tetsuo Handa57c25902010-06-03 20:38:44 +09001048 if (!path->mnt ||
1049 tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
1050 == TOMOYO_CONFIG_DISABLED)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001051 return 0;
1052 idx = tomoyo_read_lock();
1053 error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001054 if (tomoyo_get_realpath(&buf, path)) {
Tetsuo Handacf6e9a62010-06-16 16:21:36 +09001055 dev = new_decode_dev(dev);
Tetsuo Handa75093152010-06-16 16:23:55 +09001056 r.param_type = TOMOYO_TYPE_MKDEV_ACL;
Tetsuo Handacf6e9a62010-06-16 16:21:36 +09001057 r.param.mkdev.filename = &buf;
1058 r.param.mkdev.operation = operation;
1059 r.param.mkdev.mode = mode;
1060 r.param.mkdev.major = MAJOR(dev);
1061 r.param.mkdev.minor = MINOR(dev);
Tetsuo Handa99a85252010-06-16 16:22:51 +09001062 tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
1063 error = tomoyo_audit_mkdev_log(&r);
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001064 kfree(buf.name);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001065 }
1066 tomoyo_read_unlock(idx);
1067 if (r.mode != TOMOYO_CONFIG_ENFORCING)
1068 error = 0;
1069 return error;
1070}
1071
1072/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +09001073 * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001074 *
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001075 * @operation: Type of operation.
1076 * @path1: Pointer to "struct path".
1077 * @path2: Pointer to "struct path".
1078 *
1079 * Returns 0 on success, negative value otherwise.
1080 */
Tetsuo Handa97d69312010-02-16 09:46:15 +09001081int tomoyo_path2_perm(const u8 operation, struct path *path1,
Tetsuo Handa7ef61232010-02-16 08:03:30 +09001082 struct path *path2)
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001083{
1084 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001085 struct tomoyo_path_info buf1;
1086 struct tomoyo_path_info buf2;
Tetsuo Handacb0abe62010-05-17 10:08:05 +09001087 struct tomoyo_request_info r;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001088 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001089
Tetsuo Handa57c25902010-06-03 20:38:44 +09001090 if (!path1->mnt || !path2->mnt ||
1091 tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
1092 == TOMOYO_CONFIG_DISABLED)
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001093 return 0;
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001094 buf1.name = NULL;
1095 buf2.name = NULL;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001096 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001097 if (!tomoyo_get_realpath(&buf1, path1) ||
1098 !tomoyo_get_realpath(&buf2, path2))
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001099 goto out;
Tetsuo Handa57c25902010-06-03 20:38:44 +09001100 switch (operation) {
1101 struct dentry *dentry;
1102 case TOMOYO_TYPE_RENAME:
1103 case TOMOYO_TYPE_LINK:
1104 dentry = path1->dentry;
1105 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
1106 break;
1107 /* fall through */
1108 case TOMOYO_TYPE_PIVOT_ROOT:
1109 tomoyo_add_slash(&buf1);
1110 tomoyo_add_slash(&buf2);
1111 break;
1112 }
Tetsuo Handacf6e9a62010-06-16 16:21:36 +09001113 r.param_type = TOMOYO_TYPE_PATH2_ACL;
1114 r.param.path2.operation = operation;
1115 r.param.path2.filename1 = &buf1;
1116 r.param.path2.filename2 = &buf2;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +09001117 do {
Tetsuo Handa99a85252010-06-16 16:22:51 +09001118 tomoyo_check_acl(&r, tomoyo_check_path2_acl);
1119 error = tomoyo_audit_path2_log(&r);
1120 } while (error == TOMOYO_RETRY_REQUEST);
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001121 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +09001122 kfree(buf1.name);
1123 kfree(buf2.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +09001124 tomoyo_read_unlock(idx);
Tetsuo Handacb0abe62010-05-17 10:08:05 +09001125 if (r.mode != TOMOYO_CONFIG_ENFORCING)
Kentaro Takedab69a54e2009-02-05 17:18:14 +09001126 error = 0;
1127 return error;
1128}
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001129
1130/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001131 * tomoyo_write_file - Update file related list.
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001132 *
1133 * @data: String to parse.
1134 * @domain: Pointer to "struct tomoyo_domain_info".
1135 * @is_delete: True if it is a delete request.
1136 *
1137 * Returns 0 on success, negative value otherwise.
1138 *
1139 * Caller holds tomoyo_read_lock().
1140 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +09001141int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain,
1142 const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001143{
1144 char *w[5];
1145 u8 type;
1146 if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
1147 return -EINVAL;
Tetsuo Handa237ab452010-06-12 20:46:22 +09001148 if (strncmp(w[0], "allow_", 6))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001149 goto out;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001150 w[0] += 6;
1151 for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
1152 if (strcmp(w[0], tomoyo_path_keyword[type]))
1153 continue;
1154 return tomoyo_update_path_acl(type, w[1], domain, is_delete);
1155 }
1156 if (!w[2][0])
1157 goto out;
1158 for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
1159 if (strcmp(w[0], tomoyo_path2_keyword[type]))
1160 continue;
1161 return tomoyo_update_path2_acl(type, w[1], w[2], domain,
1162 is_delete);
1163 }
1164 for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
1165 if (strcmp(w[0], tomoyo_path_number_keyword[type]))
1166 continue;
1167 return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
1168 is_delete);
1169 }
1170 if (!w[3][0] || !w[4][0])
1171 goto out;
Tetsuo Handa75093152010-06-16 16:23:55 +09001172 for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) {
1173 if (strcmp(w[0], tomoyo_mkdev_keyword[type]))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001174 continue;
Tetsuo Handa75093152010-06-16 16:23:55 +09001175 return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3],
1176 w[4], domain, is_delete);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +09001177 }
1178 out:
1179 return -EINVAL;
1180}