blob: 3323802880782c14d9dfd37e21316d71e72fd40c [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_EXECUTE] = "execute",
15 [TOMOYO_TYPE_READ] = "read",
16 [TOMOYO_TYPE_WRITE] = "write",
Tetsuo Handa7c759642011-06-26 23:15:31 +090017 [TOMOYO_TYPE_APPEND] = "append",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090018 [TOMOYO_TYPE_UNLINK] = "unlink",
Tetsuo Handa7c759642011-06-26 23:15:31 +090019 [TOMOYO_TYPE_GETATTR] = "getattr",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090020 [TOMOYO_TYPE_RMDIR] = "rmdir",
Tetsuo Handa7ef61232010-02-16 08:03:30 +090021 [TOMOYO_TYPE_TRUNCATE] = "truncate",
22 [TOMOYO_TYPE_SYMLINK] = "symlink",
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] = {
Tetsuo Handa57c25902010-06-03 20:38:44 +090053 [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE,
54 [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN,
55 [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN,
Tetsuo Handa7c759642011-06-26 23:15:31 +090056 [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN,
Tetsuo Handa57c25902010-06-03 20:38:44 +090057 [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK,
Tetsuo Handa7c759642011-06-26 23:15:31 +090058 [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR,
Tetsuo Handa57c25902010-06-03 20:38:44 +090059 [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR,
60 [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE,
61 [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK,
Tetsuo Handa57c25902010-06-03 20:38:44 +090062 [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/**
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900135 * tomoyo_get_realpath - Get realpath.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900136 *
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900137 * @buf: Pointer to "struct tomoyo_path_info".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900138 * @path: Pointer to "struct path".
139 *
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900140 * Returns true on success, false otherwise.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900141 */
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900142static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900143{
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900144 buf->name = tomoyo_realpath_from_path(path);
145 if (buf->name) {
146 tomoyo_fill_path_info(buf);
147 return true;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900148 }
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900149 return false;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900150}
151
Tetsuo Handa99a85252010-06-16 16:22:51 +0900152/**
153 * tomoyo_audit_path_log - Audit path request log.
154 *
155 * @r: Pointer to "struct tomoyo_request_info".
156 *
157 * Returns 0 on success, negative value otherwise.
158 */
159static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
160{
161 const char *operation = tomoyo_path_keyword[r->param.path.operation];
162 const struct tomoyo_path_info *filename = r->param.path.filename;
163 if (r->granted)
164 return 0;
165 tomoyo_warn_log(r, "%s %s", operation, filename->name);
166 return tomoyo_supervisor(r, "allow_%s %s\n", operation,
Tetsuo Handa7c759642011-06-26 23:15:31 +0900167 filename->name);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900168}
169
170/**
171 * tomoyo_audit_path2_log - Audit path/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_path2_log(struct tomoyo_request_info *r)
178{
179 const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
180 const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
181 const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
182 if (r->granted)
183 return 0;
184 tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
185 filename2->name);
186 return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
Tetsuo Handa7c759642011-06-26 23:15:31 +0900187 filename1->name, filename2->name);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900188}
189
190/**
191 * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
192 *
193 * @r: Pointer to "struct tomoyo_request_info".
194 *
195 * Returns 0 on success, negative value otherwise.
196 */
197static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
198{
Tetsuo Handa71c28232010-06-16 16:26:38 +0900199 const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
Tetsuo Handa99a85252010-06-16 16:22:51 +0900200 const struct tomoyo_path_info *filename = r->param.mkdev.filename;
201 const unsigned int major = r->param.mkdev.major;
202 const unsigned int minor = r->param.mkdev.minor;
203 const unsigned int mode = r->param.mkdev.mode;
204 if (r->granted)
205 return 0;
206 tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
207 major, minor);
208 return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation,
Tetsuo Handa7c759642011-06-26 23:15:31 +0900209 filename->name, mode, major, minor);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900210}
211
212/**
213 * tomoyo_audit_path_number_log - Audit path/number request log.
214 *
Tetsuo Handab5bc60b2011-06-26 23:16:03 +0900215 * @r: Pointer to "struct tomoyo_request_info".
Tetsuo Handa99a85252010-06-16 16:22:51 +0900216 *
217 * Returns 0 on success, negative value otherwise.
218 */
219static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
220{
221 const u8 type = r->param.path_number.operation;
222 u8 radix;
223 const struct tomoyo_path_info *filename = r->param.path_number.filename;
224 const char *operation = tomoyo_path_number_keyword[type];
225 char buffer[64];
226 if (r->granted)
227 return 0;
228 switch (type) {
229 case TOMOYO_TYPE_CREATE:
230 case TOMOYO_TYPE_MKDIR:
231 case TOMOYO_TYPE_MKFIFO:
232 case TOMOYO_TYPE_MKSOCK:
233 case TOMOYO_TYPE_CHMOD:
234 radix = TOMOYO_VALUE_TYPE_OCTAL;
235 break;
236 case TOMOYO_TYPE_IOCTL:
237 radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
238 break;
239 default:
240 radix = TOMOYO_VALUE_TYPE_DECIMAL;
241 break;
242 }
243 tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
244 radix);
245 tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
246 return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
Tetsuo Handa7c759642011-06-26 23:15:31 +0900247 filename->name, buffer);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900248}
249
Tetsuo Handa484ca792010-07-29 14:29:55 +0900250static bool tomoyo_check_path_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900251 const struct tomoyo_acl_info *ptr)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900252{
Tetsuo Handa99a85252010-06-16 16:22:51 +0900253 const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
254 head);
Tetsuo Handa484ca792010-07-29 14:29:55 +0900255 if (acl->perm & (1 << r->param.path.operation)) {
256 r->param.path.matched_path =
257 tomoyo_compare_name_union(r->param.path.filename,
258 &acl->name);
259 return r->param.path.matched_path != NULL;
260 }
261 return false;
Tetsuo Handa99a85252010-06-16 16:22:51 +0900262}
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900263
Tetsuo Handa484ca792010-07-29 14:29:55 +0900264static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900265 const struct tomoyo_acl_info *ptr)
266{
267 const struct tomoyo_path_number_acl *acl =
268 container_of(ptr, typeof(*acl), head);
269 return (acl->perm & (1 << r->param.path_number.operation)) &&
270 tomoyo_compare_number_union(r->param.path_number.number,
271 &acl->number) &&
272 tomoyo_compare_name_union(r->param.path_number.filename,
273 &acl->name);
274}
275
Tetsuo Handa484ca792010-07-29 14:29:55 +0900276static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900277 const struct tomoyo_acl_info *ptr)
278{
279 const struct tomoyo_path2_acl *acl =
280 container_of(ptr, typeof(*acl), head);
281 return (acl->perm & (1 << r->param.path2.operation)) &&
282 tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
283 && tomoyo_compare_name_union(r->param.path2.filename2,
284 &acl->name2);
285}
286
Tetsuo Handa484ca792010-07-29 14:29:55 +0900287static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r,
Tetsuo Handa99a85252010-06-16 16:22:51 +0900288 const struct tomoyo_acl_info *ptr)
289{
Tetsuo Handa75093152010-06-16 16:23:55 +0900290 const struct tomoyo_mkdev_acl *acl =
Tetsuo Handa99a85252010-06-16 16:22:51 +0900291 container_of(ptr, typeof(*acl), head);
292 return (acl->perm & (1 << r->param.mkdev.operation)) &&
293 tomoyo_compare_number_union(r->param.mkdev.mode,
294 &acl->mode) &&
295 tomoyo_compare_number_union(r->param.mkdev.major,
296 &acl->major) &&
297 tomoyo_compare_number_union(r->param.mkdev.minor,
298 &acl->minor) &&
299 tomoyo_compare_name_union(r->param.mkdev.filename,
300 &acl->name);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900301}
302
Tetsuo Handa237ab452010-06-12 20:46:22 +0900303static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
304 const struct tomoyo_acl_info *b)
305{
306 const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head);
307 const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900308 return tomoyo_same_acl_head(&p1->head, &p2->head) &&
309 tomoyo_same_name_union(&p1->name, &p2->name);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900310}
311
Tetsuo Handa7c759642011-06-26 23:15:31 +0900312/**
313 * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry.
314 *
315 * @a: Pointer to "struct tomoyo_acl_info".
316 * @b: Pointer to "struct tomoyo_acl_info".
317 * @is_delete: True for @a &= ~@b, false for @a |= @b.
318 *
319 * Returns true if @a is empty, false otherwise.
320 */
Tetsuo Handa237ab452010-06-12 20:46:22 +0900321static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a,
322 struct tomoyo_acl_info *b,
323 const bool is_delete)
324{
325 u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head)
326 ->perm;
327 u16 perm = *a_perm;
328 const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm;
Tetsuo Handa7c759642011-06-26 23:15:31 +0900329 if (is_delete)
Tetsuo Handa237ab452010-06-12 20:46:22 +0900330 perm &= ~b_perm;
Tetsuo Handa7c759642011-06-26 23:15:31 +0900331 else
Tetsuo Handa237ab452010-06-12 20:46:22 +0900332 perm |= b_perm;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900333 *a_perm = perm;
334 return !perm;
335}
336
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900337/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900338 * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900339 *
340 * @type: Type of operation.
341 * @filename: Filename.
342 * @domain: Pointer to "struct tomoyo_domain_info".
343 * @is_delete: True if it is a delete request.
344 *
345 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900346 *
347 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900348 */
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900349static int tomoyo_update_path_acl(const u8 type, const char *filename,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900350 struct tomoyo_domain_info * const domain,
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900351 const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900352{
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900353 struct tomoyo_path_acl e = {
354 .head.type = TOMOYO_TYPE_PATH_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900355 .perm = 1 << type
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900356 };
Tetsuo Handa237ab452010-06-12 20:46:22 +0900357 int error;
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900358 if (!tomoyo_parse_name_union(filename, &e.name))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900359 return -EINVAL;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900360 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
361 tomoyo_same_path_acl,
362 tomoyo_merge_path_acl);
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900363 tomoyo_put_name_union(&e.name);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900364 return error;
365}
366
Tetsuo Handa75093152010-06-16 16:23:55 +0900367static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900368 const struct tomoyo_acl_info *b)
369{
Tetsuo Handa75093152010-06-16 16:23:55 +0900370 const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1),
Tetsuo Handa237ab452010-06-12 20:46:22 +0900371 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900372 const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2),
Tetsuo Handa237ab452010-06-12 20:46:22 +0900373 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900374 return tomoyo_same_acl_head(&p1->head, &p2->head)
375 && tomoyo_same_name_union(&p1->name, &p2->name)
376 && tomoyo_same_number_union(&p1->mode, &p2->mode)
377 && tomoyo_same_number_union(&p1->major, &p2->major)
378 && tomoyo_same_number_union(&p1->minor, &p2->minor);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900379}
380
Tetsuo Handa75093152010-06-16 16:23:55 +0900381static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900382 struct tomoyo_acl_info *b,
383 const bool is_delete)
384{
Tetsuo Handa75093152010-06-16 16:23:55 +0900385 u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900386 head)->perm;
387 u8 perm = *a_perm;
Tetsuo Handa75093152010-06-16 16:23:55 +0900388 const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head)
Tetsuo Handa237ab452010-06-12 20:46:22 +0900389 ->perm;
390 if (is_delete)
391 perm &= ~b_perm;
392 else
393 perm |= b_perm;
394 *a_perm = perm;
395 return !perm;
396}
397
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900398/**
Tetsuo Handa75093152010-06-16 16:23:55 +0900399 * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900400 *
401 * @type: Type of operation.
402 * @filename: Filename.
403 * @mode: Create mode.
404 * @major: Device major number.
405 * @minor: Device minor number.
406 * @domain: Pointer to "struct tomoyo_domain_info".
407 * @is_delete: True if it is a delete request.
408 *
409 * Returns 0 on success, negative value otherwise.
Tetsuo Handa237ab452010-06-12 20:46:22 +0900410 *
411 * Caller holds tomoyo_read_lock().
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900412 */
Tetsuo Handa75093152010-06-16 16:23:55 +0900413static int tomoyo_update_mkdev_acl(const u8 type, const char *filename,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900414 char *mode, char *major, char *minor,
415 struct tomoyo_domain_info * const
416 domain, const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900417{
Tetsuo Handa75093152010-06-16 16:23:55 +0900418 struct tomoyo_mkdev_acl e = {
419 .head.type = TOMOYO_TYPE_MKDEV_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900420 .perm = 1 << type
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900421 };
422 int error = is_delete ? -ENOENT : -ENOMEM;
423 if (!tomoyo_parse_name_union(filename, &e.name) ||
424 !tomoyo_parse_number_union(mode, &e.mode) ||
425 !tomoyo_parse_number_union(major, &e.major) ||
426 !tomoyo_parse_number_union(minor, &e.minor))
427 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900428 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
Tetsuo Handa75093152010-06-16 16:23:55 +0900429 tomoyo_same_mkdev_acl,
430 tomoyo_merge_mkdev_acl);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900431 out:
432 tomoyo_put_name_union(&e.name);
433 tomoyo_put_number_union(&e.mode);
434 tomoyo_put_number_union(&e.major);
435 tomoyo_put_number_union(&e.minor);
436 return error;
437}
438
Tetsuo Handa237ab452010-06-12 20:46:22 +0900439static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a,
440 const struct tomoyo_acl_info *b)
441{
442 const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head);
443 const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900444 return tomoyo_same_acl_head(&p1->head, &p2->head)
445 && tomoyo_same_name_union(&p1->name1, &p2->name1)
446 && tomoyo_same_name_union(&p1->name2, &p2->name2);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900447}
448
449static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a,
450 struct tomoyo_acl_info *b,
451 const bool is_delete)
452{
453 u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head)
454 ->perm;
455 u8 perm = *a_perm;
456 const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm;
457 if (is_delete)
458 perm &= ~b_perm;
459 else
460 perm |= b_perm;
461 *a_perm = perm;
462 return !perm;
463}
464
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900465/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900466 * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900467 *
468 * @type: Type of operation.
469 * @filename1: First filename.
470 * @filename2: Second filename.
471 * @domain: Pointer to "struct tomoyo_domain_info".
472 * @is_delete: True if it is a delete request.
473 *
474 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900475 *
476 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900477 */
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900478static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
479 const char *filename2,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900480 struct tomoyo_domain_info * const domain,
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900481 const bool is_delete)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900482{
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900483 struct tomoyo_path2_acl e = {
484 .head.type = TOMOYO_TYPE_PATH2_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900485 .perm = 1 << type
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900486 };
Tetsuo Handa9e4b50e2010-05-06 12:40:02 +0900487 int error = is_delete ? -ENOENT : -ENOMEM;
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900488 if (!tomoyo_parse_name_union(filename1, &e.name1) ||
489 !tomoyo_parse_name_union(filename2, &e.name2))
Tetsuo Handaca0b7df2010-02-07 20:23:59 +0900490 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900491 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
492 tomoyo_same_path2_acl,
493 tomoyo_merge_path2_acl);
Tetsuo Handaca0b7df2010-02-07 20:23:59 +0900494 out:
Tetsuo Handa7762fbf2010-05-10 17:30:26 +0900495 tomoyo_put_name_union(&e.name1);
496 tomoyo_put_name_union(&e.name2);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900497 return error;
498}
499
500/**
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900501 * tomoyo_path_permission - Check permission for single path operation.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900502 *
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900503 * @r: Pointer to "struct tomoyo_request_info".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900504 * @operation: Type of operation.
505 * @filename: Filename to check.
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900506 *
507 * Returns 0 on success, negative value otherwise.
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900508 *
509 * Caller holds tomoyo_read_lock().
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900510 */
Tetsuo Handa05336de2010-06-16 16:20:24 +0900511int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
512 const struct tomoyo_path_info *filename)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900513{
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900514 int error;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900515
Tetsuo Handa57c25902010-06-03 20:38:44 +0900516 r->type = tomoyo_p2mac[operation];
517 r->mode = tomoyo_get_mode(r->profile, r->type);
518 if (r->mode == TOMOYO_CONFIG_DISABLED)
519 return 0;
Tetsuo Handacf6e9a62010-06-16 16:21:36 +0900520 r->param_type = TOMOYO_TYPE_PATH_ACL;
521 r->param.path.filename = filename;
522 r->param.path.operation = operation;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +0900523 do {
Tetsuo Handa99a85252010-06-16 16:22:51 +0900524 tomoyo_check_acl(r, tomoyo_check_path_acl);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900525 error = tomoyo_audit_path_log(r);
Tetsuo Handa05336de2010-06-16 16:20:24 +0900526 /*
527 * Do not retry for execute request, for alias may have
528 * changed.
529 */
530 } while (error == TOMOYO_RETRY_REQUEST &&
531 operation != TOMOYO_TYPE_EXECUTE);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900532 return error;
533}
534
Tetsuo Handa237ab452010-06-12 20:46:22 +0900535static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
536 const struct tomoyo_acl_info *b)
537{
538 const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1),
539 head);
540 const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2),
541 head);
Tetsuo Handa75093152010-06-16 16:23:55 +0900542 return tomoyo_same_acl_head(&p1->head, &p2->head)
543 && tomoyo_same_name_union(&p1->name, &p2->name)
544 && tomoyo_same_number_union(&p1->number, &p2->number);
Tetsuo Handa237ab452010-06-12 20:46:22 +0900545}
546
547static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a,
548 struct tomoyo_acl_info *b,
549 const bool is_delete)
550{
551 u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl,
552 head)->perm;
553 u8 perm = *a_perm;
554 const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head)
555 ->perm;
556 if (is_delete)
557 perm &= ~b_perm;
558 else
559 perm |= b_perm;
560 *a_perm = perm;
561 return !perm;
562}
563
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900564/**
565 * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
566 *
567 * @type: Type of operation.
568 * @filename: Filename.
569 * @number: Number.
570 * @domain: Pointer to "struct tomoyo_domain_info".
571 * @is_delete: True if it is a delete request.
572 *
573 * Returns 0 on success, negative value otherwise.
574 */
Tetsuo Handa237ab452010-06-12 20:46:22 +0900575static int tomoyo_update_path_number_acl(const u8 type, const char *filename,
576 char *number,
577 struct tomoyo_domain_info * const
578 domain,
579 const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900580{
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900581 struct tomoyo_path_number_acl e = {
582 .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
Tetsuo Handa237ab452010-06-12 20:46:22 +0900583 .perm = 1 << type
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900584 };
585 int error = is_delete ? -ENOENT : -ENOMEM;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900586 if (!tomoyo_parse_name_union(filename, &e.name))
587 return -EINVAL;
588 if (!tomoyo_parse_number_union(number, &e.number))
589 goto out;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900590 error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
591 tomoyo_same_path_number_acl,
592 tomoyo_merge_path_number_acl);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900593 out:
594 tomoyo_put_name_union(&e.name);
595 tomoyo_put_number_union(&e.number);
596 return error;
597}
598
599/**
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900600 * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
601 *
602 * @type: Type of operation.
603 * @path: Pointer to "struct path".
604 * @number: Number.
605 *
606 * Returns 0 on success, negative value otherwise.
607 */
608int tomoyo_path_number_perm(const u8 type, struct path *path,
609 unsigned long number)
610{
611 struct tomoyo_request_info r;
612 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900613 struct tomoyo_path_info buf;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900614 int idx;
615
Tetsuo Handa57c25902010-06-03 20:38:44 +0900616 if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
617 == TOMOYO_CONFIG_DISABLED || !path->mnt || !path->dentry)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900618 return 0;
619 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900620 if (!tomoyo_get_realpath(&buf, path))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900621 goto out;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900622 if (type == TOMOYO_TYPE_MKDIR)
623 tomoyo_add_slash(&buf);
Tetsuo Handacb917cf2010-06-16 16:28:21 +0900624 r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
625 r.param.path_number.operation = type;
626 r.param.path_number.filename = &buf;
627 r.param.path_number.number = number;
628 do {
629 tomoyo_check_acl(&r, tomoyo_check_path_number_acl);
630 error = tomoyo_audit_path_number_log(&r);
631 } while (error == TOMOYO_RETRY_REQUEST);
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900632 kfree(buf.name);
Tetsuo Handacb917cf2010-06-16 16:28:21 +0900633 out:
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900634 tomoyo_read_unlock(idx);
635 if (r.mode != TOMOYO_CONFIG_ENFORCING)
636 error = 0;
637 return error;
638}
639
640/**
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900641 * tomoyo_check_open_permission - Check permission for "read" and "write".
642 *
643 * @domain: Pointer to "struct tomoyo_domain_info".
644 * @path: Pointer to "struct path".
645 * @flag: Flags for open().
646 *
647 * Returns 0 on success, negative value otherwise.
648 */
649int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
650 struct path *path, const int flag)
651{
652 const u8 acc_mode = ACC_MODE(flag);
Tetsuo Handaeae61f32011-03-02 16:54:24 +0900653 int error = 0;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900654 struct tomoyo_path_info buf;
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900655 struct tomoyo_request_info r;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900656 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900657
Tetsuo Handa7c759642011-06-26 23:15:31 +0900658 if (!path->mnt)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900659 return 0;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900660 buf.name = NULL;
661 r.mode = TOMOYO_CONFIG_DISABLED;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900662 idx = tomoyo_read_lock();
Tetsuo Handa7c759642011-06-26 23:15:31 +0900663 if (acc_mode &&
664 tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN)
Tetsuo Handa57c25902010-06-03 20:38:44 +0900665 != TOMOYO_CONFIG_DISABLED) {
666 if (!tomoyo_get_realpath(&buf, path)) {
667 error = -ENOMEM;
668 goto out;
669 }
Tetsuo Handa7c759642011-06-26 23:15:31 +0900670 if (acc_mode & MAY_READ)
671 error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ,
Tetsuo Handa57c25902010-06-03 20:38:44 +0900672 &buf);
Tetsuo Handa7c759642011-06-26 23:15:31 +0900673 if (!error && (acc_mode & MAY_WRITE))
674 error = tomoyo_path_permission(&r, (flag & O_APPEND) ?
675 TOMOYO_TYPE_APPEND :
676 TOMOYO_TYPE_WRITE,
677 &buf);
Tetsuo Handa57c25902010-06-03 20:38:44 +0900678 }
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900679 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900680 kfree(buf.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900681 tomoyo_read_unlock(idx);
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900682 if (r.mode != TOMOYO_CONFIG_ENFORCING)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900683 error = 0;
684 return error;
685}
686
687/**
Tetsuo Handa7c759642011-06-26 23:15:31 +0900688 * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900689 *
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900690 * @operation: Type of operation.
691 * @path: Pointer to "struct path".
692 *
693 * Returns 0 on success, negative value otherwise.
694 */
Tetsuo Handa97d69312010-02-16 09:46:15 +0900695int tomoyo_path_perm(const u8 operation, struct path *path)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900696{
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900697 struct tomoyo_request_info r;
Tetsuo Handa7c759642011-06-26 23:15:31 +0900698 int error;
699 struct tomoyo_path_info buf;
700 bool is_enforce;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900701 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900702
Tetsuo Handa57c25902010-06-03 20:38:44 +0900703 if (!path->mnt)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900704 return 0;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900705 if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
706 == TOMOYO_CONFIG_DISABLED)
707 return 0;
Tetsuo Handa7c759642011-06-26 23:15:31 +0900708 is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING);
709 error = -ENOMEM;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900710 buf.name = NULL;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900711 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900712 if (!tomoyo_get_realpath(&buf, path))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900713 goto out;
714 switch (operation) {
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900715 case TOMOYO_TYPE_RMDIR:
716 case TOMOYO_TYPE_CHROOT:
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900717 tomoyo_add_slash(&buf);
718 break;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900719 }
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900720 error = tomoyo_path_permission(&r, operation, &buf);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900721 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900722 kfree(buf.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900723 tomoyo_read_unlock(idx);
Tetsuo Handa7c759642011-06-26 23:15:31 +0900724 if (!is_enforce)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900725 error = 0;
726 return error;
727}
728
729/**
Tetsuo Handa75093152010-06-16 16:23:55 +0900730 * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900731 *
732 * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
733 * @path: Pointer to "struct path".
734 * @mode: Create mode.
735 * @dev: Device number.
736 *
737 * Returns 0 on success, negative value otherwise.
738 */
Tetsuo Handa75093152010-06-16 16:23:55 +0900739int tomoyo_mkdev_perm(const u8 operation, struct path *path,
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900740 const unsigned int mode, unsigned int dev)
741{
742 struct tomoyo_request_info r;
743 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900744 struct tomoyo_path_info buf;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900745 int idx;
746
Tetsuo Handa57c25902010-06-03 20:38:44 +0900747 if (!path->mnt ||
748 tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
749 == TOMOYO_CONFIG_DISABLED)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900750 return 0;
751 idx = tomoyo_read_lock();
752 error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900753 if (tomoyo_get_realpath(&buf, path)) {
Tetsuo Handacf6e9a62010-06-16 16:21:36 +0900754 dev = new_decode_dev(dev);
Tetsuo Handa75093152010-06-16 16:23:55 +0900755 r.param_type = TOMOYO_TYPE_MKDEV_ACL;
Tetsuo Handacf6e9a62010-06-16 16:21:36 +0900756 r.param.mkdev.filename = &buf;
757 r.param.mkdev.operation = operation;
758 r.param.mkdev.mode = mode;
759 r.param.mkdev.major = MAJOR(dev);
760 r.param.mkdev.minor = MINOR(dev);
Tetsuo Handa99a85252010-06-16 16:22:51 +0900761 tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
762 error = tomoyo_audit_mkdev_log(&r);
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900763 kfree(buf.name);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900764 }
765 tomoyo_read_unlock(idx);
766 if (r.mode != TOMOYO_CONFIG_ENFORCING)
767 error = 0;
768 return error;
769}
770
771/**
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900772 * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900773 *
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900774 * @operation: Type of operation.
775 * @path1: Pointer to "struct path".
776 * @path2: Pointer to "struct path".
777 *
778 * Returns 0 on success, negative value otherwise.
779 */
Tetsuo Handa97d69312010-02-16 09:46:15 +0900780int tomoyo_path2_perm(const u8 operation, struct path *path1,
Tetsuo Handa7ef61232010-02-16 08:03:30 +0900781 struct path *path2)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900782{
783 int error = -ENOMEM;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900784 struct tomoyo_path_info buf1;
785 struct tomoyo_path_info buf2;
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900786 struct tomoyo_request_info r;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900787 int idx;
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900788
Tetsuo Handa57c25902010-06-03 20:38:44 +0900789 if (!path1->mnt || !path2->mnt ||
790 tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
791 == TOMOYO_CONFIG_DISABLED)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900792 return 0;
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900793 buf1.name = NULL;
794 buf2.name = NULL;
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900795 idx = tomoyo_read_lock();
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900796 if (!tomoyo_get_realpath(&buf1, path1) ||
797 !tomoyo_get_realpath(&buf2, path2))
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900798 goto out;
Tetsuo Handa57c25902010-06-03 20:38:44 +0900799 switch (operation) {
800 struct dentry *dentry;
801 case TOMOYO_TYPE_RENAME:
802 case TOMOYO_TYPE_LINK:
803 dentry = path1->dentry;
804 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
805 break;
806 /* fall through */
807 case TOMOYO_TYPE_PIVOT_ROOT:
808 tomoyo_add_slash(&buf1);
809 tomoyo_add_slash(&buf2);
810 break;
811 }
Tetsuo Handacf6e9a62010-06-16 16:21:36 +0900812 r.param_type = TOMOYO_TYPE_PATH2_ACL;
813 r.param.path2.operation = operation;
814 r.param.path2.filename1 = &buf1;
815 r.param.path2.filename2 = &buf2;
Tetsuo Handa17fcfbd2010-05-17 10:11:36 +0900816 do {
Tetsuo Handa99a85252010-06-16 16:22:51 +0900817 tomoyo_check_acl(&r, tomoyo_check_path2_acl);
818 error = tomoyo_audit_path2_log(&r);
819 } while (error == TOMOYO_RETRY_REQUEST);
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900820 out:
Tetsuo Handac8c57e82010-06-03 20:36:43 +0900821 kfree(buf1.name);
822 kfree(buf2.name);
Tetsuo Handafdb8ebb2009-12-08 09:34:43 +0900823 tomoyo_read_unlock(idx);
Tetsuo Handacb0abe62010-05-17 10:08:05 +0900824 if (r.mode != TOMOYO_CONFIG_ENFORCING)
Kentaro Takedab69a54e2009-02-05 17:18:14 +0900825 error = 0;
826 return error;
827}
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900828
829/**
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900830 * tomoyo_write_file - Update file related list.
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900831 *
832 * @data: String to parse.
833 * @domain: Pointer to "struct tomoyo_domain_info".
834 * @is_delete: True if it is a delete request.
835 *
836 * Returns 0 on success, negative value otherwise.
837 *
838 * Caller holds tomoyo_read_lock().
839 */
Tetsuo Handae2bf6902010-06-25 11:16:00 +0900840int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain,
841 const bool is_delete)
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900842{
843 char *w[5];
844 u8 type;
845 if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
846 return -EINVAL;
Tetsuo Handa237ab452010-06-12 20:46:22 +0900847 if (strncmp(w[0], "allow_", 6))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900848 goto out;
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900849 w[0] += 6;
850 for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
851 if (strcmp(w[0], tomoyo_path_keyword[type]))
852 continue;
853 return tomoyo_update_path_acl(type, w[1], domain, is_delete);
854 }
855 if (!w[2][0])
856 goto out;
857 for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
858 if (strcmp(w[0], tomoyo_path2_keyword[type]))
859 continue;
860 return tomoyo_update_path2_acl(type, w[1], w[2], domain,
861 is_delete);
862 }
863 for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
864 if (strcmp(w[0], tomoyo_path_number_keyword[type]))
865 continue;
866 return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
867 is_delete);
868 }
869 if (!w[3][0] || !w[4][0])
870 goto out;
Tetsuo Handa75093152010-06-16 16:23:55 +0900871 for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) {
872 if (strcmp(w[0], tomoyo_mkdev_keyword[type]))
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900873 continue;
Tetsuo Handa75093152010-06-16 16:23:55 +0900874 return tomoyo_update_mkdev_acl(type, w[1], w[2], w[3],
875 w[4], domain, is_delete);
Tetsuo Handaa1f9bb62010-05-17 10:09:15 +0900876 }
877 out:
878 return -EINVAL;
879}