1 |
kumaneko |
111 |
/* |
2 |
kumaneko |
2853 |
* fs/ccsecurity/util.c |
3 |
kumaneko |
111 |
* |
4 |
kumaneko |
2030 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
kumaneko |
111 |
* |
6 |
kumaneko |
2727 |
* Version: 1.7.0-pre 2009/07/03 |
7 |
kumaneko |
111 |
* |
8 |
|
|
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
9 |
|
|
* See README.ccs for ChangeLog. |
10 |
|
|
* |
11 |
|
|
*/ |
12 |
|
|
|
13 |
kumaneko |
2854 |
#include "internal.h" |
14 |
kumaneko |
1052 |
|
15 |
kumaneko |
2690 |
DEFINE_MUTEX(ccs_policy_lock); |
16 |
kumaneko |
2540 |
|
17 |
kumaneko |
1052 |
/* Has /sbin/init started? */ |
18 |
kumaneko |
2040 |
bool ccs_policy_loaded; |
19 |
kumaneko |
111 |
|
20 |
kumaneko |
1052 |
/* Capability name used by domain policy. */ |
21 |
kumaneko |
2863 |
const char *ccs_capability_control_keyword[CCS_MAX_CAPABILITY_INDEX] |
22 |
kumaneko |
2002 |
= { |
23 |
kumaneko |
2282 |
[CCS_INET_STREAM_SOCKET_CREATE] = "inet_tcp_create", |
24 |
|
|
[CCS_INET_STREAM_SOCKET_LISTEN] = "inet_tcp_listen", |
25 |
|
|
[CCS_INET_STREAM_SOCKET_CONNECT] = "inet_tcp_connect", |
26 |
|
|
[CCS_USE_INET_DGRAM_SOCKET] = "use_inet_udp", |
27 |
|
|
[CCS_USE_INET_RAW_SOCKET] = "use_inet_ip", |
28 |
|
|
[CCS_USE_ROUTE_SOCKET] = "use_route", |
29 |
|
|
[CCS_USE_PACKET_SOCKET] = "use_packet", |
30 |
|
|
[CCS_SYS_MOUNT] = "SYS_MOUNT", |
31 |
|
|
[CCS_SYS_UMOUNT] = "SYS_UMOUNT", |
32 |
|
|
[CCS_SYS_REBOOT] = "SYS_REBOOT", |
33 |
|
|
[CCS_SYS_CHROOT] = "SYS_CHROOT", |
34 |
|
|
[CCS_SYS_KILL] = "SYS_KILL", |
35 |
|
|
[CCS_SYS_VHANGUP] = "SYS_VHANGUP", |
36 |
|
|
[CCS_SYS_SETTIME] = "SYS_TIME", |
37 |
|
|
[CCS_SYS_NICE] = "SYS_NICE", |
38 |
|
|
[CCS_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
39 |
|
|
[CCS_USE_KERNEL_MODULE] = "use_kernel_module", |
40 |
|
|
[CCS_CREATE_FIFO] = "create_fifo", |
41 |
|
|
[CCS_CREATE_BLOCK_DEV] = "create_block_dev", |
42 |
|
|
[CCS_CREATE_CHAR_DEV] = "create_char_dev", |
43 |
|
|
[CCS_CREATE_UNIX_SOCKET] = "create_unix_socket", |
44 |
|
|
[CCS_SYS_LINK] = "SYS_LINK", |
45 |
|
|
[CCS_SYS_SYMLINK] = "SYS_SYMLINK", |
46 |
|
|
[CCS_SYS_RENAME] = "SYS_RENAME", |
47 |
|
|
[CCS_SYS_UNLINK] = "SYS_UNLINK", |
48 |
|
|
[CCS_SYS_CHMOD] = "SYS_CHMOD", |
49 |
|
|
[CCS_SYS_CHOWN] = "SYS_CHOWN", |
50 |
|
|
[CCS_SYS_IOCTL] = "SYS_IOCTL", |
51 |
|
|
[CCS_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
52 |
|
|
[CCS_SYS_PIVOT_ROOT] = "SYS_PIVOT_ROOT", |
53 |
|
|
[CCS_SYS_PTRACE] = "SYS_PTRACE", |
54 |
kumaneko |
2708 |
[CCS_CONCEAL_MOUNT] = "conceal_mount", |
55 |
kumaneko |
1015 |
}; |
56 |
|
|
|
57 |
kumaneko |
1052 |
/* Profile table. Memory is allocated as needed. */ |
58 |
kumaneko |
2863 |
struct ccs_profile *ccs_profile_ptr[MAX_PROFILES]; |
59 |
kumaneko |
111 |
|
60 |
kumaneko |
1052 |
/* Utility functions. */ |
61 |
kumaneko |
111 |
|
62 |
kumaneko |
1052 |
/** |
63 |
kumaneko |
2002 |
* ccs_is_byte_range - Check whether the string isa \ooo style octal value. |
64 |
kumaneko |
1052 |
* |
65 |
|
|
* @str: Pointer to the string. |
66 |
|
|
* |
67 |
|
|
* Returns true if @str is a \ooo style octal value, false otherwise. |
68 |
|
|
*/ |
69 |
kumaneko |
2002 |
static inline bool ccs_is_byte_range(const char *str) |
70 |
kumaneko |
1052 |
{ |
71 |
|
|
return *str >= '0' && *str++ <= '3' && |
72 |
|
|
*str >= '0' && *str++ <= '7' && |
73 |
|
|
*str >= '0' && *str <= '7'; |
74 |
|
|
} |
75 |
|
|
|
76 |
|
|
/** |
77 |
kumaneko |
2002 |
* ccs_is_decimal - Check whether the character is a decimal character. |
78 |
kumaneko |
1052 |
* |
79 |
|
|
* @c: The character to check. |
80 |
|
|
* |
81 |
|
|
* Returns true if @c is a decimal character, false otherwise. |
82 |
|
|
*/ |
83 |
kumaneko |
2002 |
static inline bool ccs_is_decimal(const char c) |
84 |
kumaneko |
1052 |
{ |
85 |
kumaneko |
1468 |
return c >= '0' && c <= '9'; |
86 |
kumaneko |
1052 |
} |
87 |
|
|
|
88 |
|
|
/** |
89 |
kumaneko |
2002 |
* ccs_is_hexadecimal - Check whether the character is a hexadecimal character. |
90 |
kumaneko |
1052 |
* |
91 |
|
|
* @c: The character to check. |
92 |
|
|
* |
93 |
|
|
* Returns true if @c is a hexadecimal character, false otherwise. |
94 |
|
|
*/ |
95 |
kumaneko |
2002 |
static inline bool ccs_is_hexadecimal(const char c) |
96 |
kumaneko |
1052 |
{ |
97 |
kumaneko |
1468 |
return (c >= '0' && c <= '9') || |
98 |
kumaneko |
1052 |
(c >= 'A' && c <= 'F') || |
99 |
kumaneko |
1468 |
(c >= 'a' && c <= 'f'); |
100 |
kumaneko |
1052 |
} |
101 |
|
|
|
102 |
|
|
/** |
103 |
kumaneko |
2002 |
* ccs_is_alphabet_char - Check whether the character is an alphabet. |
104 |
kumaneko |
1052 |
* |
105 |
|
|
* @c: The character to check. |
106 |
|
|
* |
107 |
|
|
* Returns true if @c is an alphabet character, false otherwise. |
108 |
|
|
*/ |
109 |
kumaneko |
2002 |
static inline bool ccs_is_alphabet_char(const char c) |
110 |
kumaneko |
1052 |
{ |
111 |
kumaneko |
1794 |
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); |
112 |
kumaneko |
1052 |
} |
113 |
|
|
|
114 |
|
|
/** |
115 |
kumaneko |
2002 |
* ccs_make_byte - Make byte value from three octal characters. |
116 |
kumaneko |
1064 |
* |
117 |
|
|
* @c1: The first character. |
118 |
|
|
* @c2: The second character. |
119 |
|
|
* @c3: The third character. |
120 |
|
|
* |
121 |
|
|
* Returns byte value. |
122 |
|
|
*/ |
123 |
kumaneko |
2002 |
static inline u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3) |
124 |
kumaneko |
1064 |
{ |
125 |
|
|
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
126 |
|
|
} |
127 |
|
|
|
128 |
|
|
/** |
129 |
kumaneko |
2002 |
* ccs_str_starts - Check whether the given string starts with the given keyword. |
130 |
kumaneko |
1052 |
* |
131 |
|
|
* @src: Pointer to pointer to the string. |
132 |
|
|
* @find: Pointer to the keyword. |
133 |
|
|
* |
134 |
|
|
* Returns true if @src starts with @find, false otherwise. |
135 |
|
|
* |
136 |
|
|
* The @src is updated to point the first character after the @find |
137 |
kumaneko |
1064 |
* if @src starts with @find. |
138 |
kumaneko |
1052 |
*/ |
139 |
kumaneko |
2863 |
bool ccs_str_starts(char **src, const char *find) |
140 |
kumaneko |
1052 |
{ |
141 |
|
|
const int len = strlen(find); |
142 |
|
|
char *tmp = *src; |
143 |
|
|
if (strncmp(tmp, find, len)) |
144 |
|
|
return false; |
145 |
|
|
tmp += len; |
146 |
|
|
*src = tmp; |
147 |
|
|
return true; |
148 |
|
|
} |
149 |
|
|
|
150 |
|
|
/** |
151 |
kumaneko |
2002 |
* ccs_normalize_line - Format string. |
152 |
kumaneko |
1052 |
* |
153 |
|
|
* @buffer: The line to normalize. |
154 |
|
|
* |
155 |
kumaneko |
111 |
* Leading and trailing whitespaces are removed. |
156 |
|
|
* Multiple whitespaces are packed into single space. |
157 |
kumaneko |
1052 |
* |
158 |
|
|
* Returns nothing. |
159 |
kumaneko |
111 |
*/ |
160 |
kumaneko |
2308 |
void ccs_normalize_line(unsigned char *buffer) |
161 |
kumaneko |
111 |
{ |
162 |
kumaneko |
1064 |
unsigned char *sp = buffer; |
163 |
|
|
unsigned char *dp = buffer; |
164 |
kumaneko |
1006 |
bool first = true; |
165 |
kumaneko |
1052 |
while (*sp && (*sp <= ' ' || *sp >= 127)) |
166 |
|
|
sp++; |
167 |
kumaneko |
111 |
while (*sp) { |
168 |
kumaneko |
1052 |
if (!first) |
169 |
|
|
*dp++ = ' '; |
170 |
kumaneko |
1006 |
first = false; |
171 |
kumaneko |
1052 |
while (*sp > ' ' && *sp < 127) |
172 |
|
|
*dp++ = *sp++; |
173 |
|
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
174 |
|
|
sp++; |
175 |
kumaneko |
111 |
} |
176 |
|
|
*dp = '\0'; |
177 |
|
|
} |
178 |
|
|
|
179 |
kumaneko |
1052 |
/** |
180 |
kumaneko |
2779 |
* ccs_tokenize - Tokenize string. |
181 |
|
|
* |
182 |
|
|
* @buffer: The line to tokenize. |
183 |
|
|
* @w: Pointer to "char *". |
184 |
|
|
* @size: Sizeof @w . |
185 |
|
|
* |
186 |
|
|
* Returns true on success, false otherwise. |
187 |
|
|
*/ |
188 |
|
|
bool ccs_tokenize(char *buffer, char *w[], size_t size) |
189 |
|
|
{ |
190 |
|
|
int count = size / sizeof(char *); |
191 |
|
|
int i; |
192 |
|
|
for (i = 0; i < count; i++) |
193 |
|
|
w[i] = ""; |
194 |
|
|
for (i = 0; i < count; i++) { |
195 |
|
|
char *cp = strchr(buffer, ' '); |
196 |
|
|
if (cp) |
197 |
|
|
*cp = '\0'; |
198 |
|
|
w[i] = buffer; |
199 |
|
|
if (!cp) |
200 |
|
|
break; |
201 |
|
|
buffer = cp + 1; |
202 |
|
|
} |
203 |
|
|
return i < count || !*buffer; |
204 |
|
|
} |
205 |
|
|
|
206 |
|
|
/** |
207 |
kumaneko |
1054 |
* ccs_is_correct_path - Validate a pathname. |
208 |
|
|
* @filename: The pathname to check. |
209 |
|
|
* @start_type: Should the pathname start with '/'? |
210 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
211 |
|
|
* @pattern_type: Can the pathname contain a wildcard? |
212 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
213 |
|
|
* @end_type: Should the pathname end with '/'? |
214 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
215 |
kumaneko |
1052 |
* |
216 |
kumaneko |
1054 |
* Check whether the given filename follows the naming rules. |
217 |
kumaneko |
1052 |
* Returns true if @filename follows the naming rules, false otherwise. |
218 |
kumaneko |
111 |
*/ |
219 |
kumaneko |
1052 |
bool ccs_is_correct_path(const char *filename, const s8 start_type, |
220 |
kumaneko |
2577 |
const s8 pattern_type, const s8 end_type) |
221 |
kumaneko |
111 |
{ |
222 |
kumaneko |
1006 |
bool contains_pattern = false; |
223 |
kumaneko |
1064 |
unsigned char c; |
224 |
|
|
unsigned char d; |
225 |
|
|
unsigned char e; |
226 |
kumaneko |
111 |
const char *original_filename = filename; |
227 |
kumaneko |
1052 |
if (!filename) |
228 |
|
|
goto out; |
229 |
kumaneko |
111 |
c = *filename; |
230 |
|
|
if (start_type == 1) { /* Must start with '/' */ |
231 |
kumaneko |
1052 |
if (c != '/') |
232 |
|
|
goto out; |
233 |
kumaneko |
111 |
} else if (start_type == -1) { /* Must not start with '/' */ |
234 |
kumaneko |
1052 |
if (c == '/') |
235 |
|
|
goto out; |
236 |
kumaneko |
111 |
} |
237 |
kumaneko |
1052 |
if (c) |
238 |
kumaneko |
1795 |
c = *(filename + strlen(filename) - 1); |
239 |
kumaneko |
111 |
if (end_type == 1) { /* Must end with '/' */ |
240 |
kumaneko |
1052 |
if (c != '/') |
241 |
|
|
goto out; |
242 |
kumaneko |
111 |
} else if (end_type == -1) { /* Must not end with '/' */ |
243 |
kumaneko |
1052 |
if (c == '/') |
244 |
|
|
goto out; |
245 |
kumaneko |
111 |
} |
246 |
kumaneko |
1747 |
while (1) { |
247 |
|
|
c = *filename++; |
248 |
|
|
if (!c) |
249 |
|
|
break; |
250 |
kumaneko |
111 |
if (c == '\\') { |
251 |
kumaneko |
1747 |
c = *filename++; |
252 |
|
|
switch (c) { |
253 |
kumaneko |
111 |
case '\\': /* "\\" */ |
254 |
|
|
continue; |
255 |
|
|
case '$': /* "\$" */ |
256 |
|
|
case '+': /* "\+" */ |
257 |
|
|
case '?': /* "\?" */ |
258 |
|
|
case '*': /* "\*" */ |
259 |
|
|
case '@': /* "\@" */ |
260 |
|
|
case 'x': /* "\x" */ |
261 |
|
|
case 'X': /* "\X" */ |
262 |
|
|
case 'a': /* "\a" */ |
263 |
|
|
case 'A': /* "\A" */ |
264 |
kumaneko |
206 |
case '-': /* "\-" */ |
265 |
kumaneko |
1052 |
if (pattern_type == -1) |
266 |
|
|
break; /* Must not contain pattern */ |
267 |
kumaneko |
1006 |
contains_pattern = true; |
268 |
kumaneko |
111 |
continue; |
269 |
|
|
case '0': /* "\ooo" */ |
270 |
|
|
case '1': |
271 |
|
|
case '2': |
272 |
|
|
case '3': |
273 |
kumaneko |
1052 |
d = *filename++; |
274 |
|
|
if (d < '0' || d > '7') |
275 |
|
|
break; |
276 |
|
|
e = *filename++; |
277 |
|
|
if (e < '0' || e > '7') |
278 |
|
|
break; |
279 |
kumaneko |
2002 |
c = ccs_make_byte(c, d, e); |
280 |
kumaneko |
1052 |
if (c && (c <= ' ' || c >= 127)) |
281 |
|
|
continue; /* pattern is not \000 */ |
282 |
kumaneko |
111 |
} |
283 |
|
|
goto out; |
284 |
|
|
} else if (c <= ' ' || c >= 127) { |
285 |
|
|
goto out; |
286 |
|
|
} |
287 |
|
|
} |
288 |
|
|
if (pattern_type == 1) { /* Must contain pattern */ |
289 |
kumaneko |
1052 |
if (!contains_pattern) |
290 |
|
|
goto out; |
291 |
kumaneko |
111 |
} |
292 |
kumaneko |
1006 |
return true; |
293 |
kumaneko |
111 |
out: |
294 |
kumaneko |
2577 |
printk(KERN_DEBUG "Invalid pathname '%s'\n", original_filename); |
295 |
kumaneko |
1006 |
return false; |
296 |
kumaneko |
111 |
} |
297 |
|
|
|
298 |
kumaneko |
1052 |
/** |
299 |
kumaneko |
1054 |
* ccs_is_correct_domain - Check whether the given domainname follows the naming rules. |
300 |
|
|
* @domainname: The domainname to check. |
301 |
kumaneko |
1052 |
* |
302 |
|
|
* Returns true if @domainname follows the naming rules, false otherwise. |
303 |
kumaneko |
111 |
*/ |
304 |
kumaneko |
2577 |
bool ccs_is_correct_domain(const unsigned char *domainname) |
305 |
kumaneko |
111 |
{ |
306 |
kumaneko |
1064 |
unsigned char c; |
307 |
|
|
unsigned char d; |
308 |
|
|
unsigned char e; |
309 |
kumaneko |
111 |
const char *org_domainname = domainname; |
310 |
kumaneko |
1052 |
if (!domainname || strncmp(domainname, ROOT_NAME, ROOT_NAME_LEN)) |
311 |
|
|
goto out; |
312 |
kumaneko |
111 |
domainname += ROOT_NAME_LEN; |
313 |
kumaneko |
1052 |
if (!*domainname) |
314 |
|
|
return true; |
315 |
kumaneko |
111 |
do { |
316 |
kumaneko |
1052 |
if (*domainname++ != ' ') |
317 |
|
|
goto out; |
318 |
|
|
if (*domainname++ != '/') |
319 |
|
|
goto out; |
320 |
kumaneko |
1747 |
while (1) { |
321 |
|
|
c = *domainname; |
322 |
|
|
if (!c || c == ' ') |
323 |
|
|
break; |
324 |
kumaneko |
111 |
domainname++; |
325 |
|
|
if (c == '\\') { |
326 |
kumaneko |
1052 |
c = *domainname++; |
327 |
|
|
switch ((c)) { |
328 |
kumaneko |
111 |
case '\\': /* "\\" */ |
329 |
|
|
continue; |
330 |
|
|
case '0': /* "\ooo" */ |
331 |
|
|
case '1': |
332 |
|
|
case '2': |
333 |
|
|
case '3': |
334 |
kumaneko |
1052 |
d = *domainname++; |
335 |
|
|
if (d < '0' || d > '7') |
336 |
|
|
break; |
337 |
|
|
e = *domainname++; |
338 |
|
|
if (e < '0' || e > '7') |
339 |
|
|
break; |
340 |
kumaneko |
2002 |
c = ccs_make_byte(c, d, e); |
341 |
kumaneko |
1052 |
if (c && (c <= ' ' || c >= 127)) |
342 |
|
|
/* pattern is not \000 */ |
343 |
|
|
continue; |
344 |
kumaneko |
111 |
} |
345 |
|
|
goto out; |
346 |
|
|
} else if (c < ' ' || c >= 127) { |
347 |
|
|
goto out; |
348 |
|
|
} |
349 |
|
|
} |
350 |
|
|
} while (*domainname); |
351 |
kumaneko |
1006 |
return true; |
352 |
kumaneko |
111 |
out: |
353 |
kumaneko |
2577 |
printk(KERN_DEBUG "Invalid domainname '%s'\n", org_domainname); |
354 |
kumaneko |
1006 |
return false; |
355 |
kumaneko |
111 |
} |
356 |
|
|
|
357 |
kumaneko |
1052 |
/** |
358 |
|
|
* ccs_is_domain_def - Check whether the given token can be a domainname. |
359 |
|
|
* |
360 |
|
|
* @buffer: The token to check. |
361 |
|
|
* |
362 |
|
|
* Returns true if @buffer possibly be a domainname, false otherwise. |
363 |
|
|
*/ |
364 |
|
|
bool ccs_is_domain_def(const unsigned char *buffer) |
365 |
kumaneko |
461 |
{ |
366 |
kumaneko |
1052 |
return !strncmp(buffer, ROOT_NAME, ROOT_NAME_LEN); |
367 |
kumaneko |
461 |
} |
368 |
|
|
|
369 |
kumaneko |
1052 |
/** |
370 |
|
|
* ccs_find_domain - Find a domain by the given name. |
371 |
|
|
* |
372 |
kumaneko |
1054 |
* @domainname: The domainname to find. |
373 |
kumaneko |
1052 |
* |
374 |
kumaneko |
2690 |
* Returns pointer to "struct ccs_domain_info" if found, NULL otherwise. |
375 |
|
|
* |
376 |
kumaneko |
2828 |
* Caller holds ccs_read_lock(). |
377 |
kumaneko |
1052 |
*/ |
378 |
kumaneko |
2690 |
struct ccs_domain_info *ccs_find_domain(const char *domainname) |
379 |
kumaneko |
461 |
{ |
380 |
kumaneko |
2282 |
struct ccs_domain_info *domain; |
381 |
kumaneko |
2002 |
struct ccs_path_info name; |
382 |
kumaneko |
2828 |
ccs_check_read_lock(); |
383 |
kumaneko |
1052 |
name.name = domainname; |
384 |
|
|
ccs_fill_path_info(&name); |
385 |
kumaneko |
2690 |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
386 |
kumaneko |
2692 |
if (!domain->is_deleted && |
387 |
|
|
!ccs_pathcmp(&name, domain->domainname)) |
388 |
|
|
return domain; |
389 |
kumaneko |
461 |
} |
390 |
kumaneko |
2692 |
return NULL; |
391 |
kumaneko |
461 |
} |
392 |
|
|
|
393 |
kumaneko |
1052 |
/** |
394 |
kumaneko |
2002 |
* ccs_path_depth - Evaluate the number of '/' in a string. |
395 |
kumaneko |
1052 |
* |
396 |
|
|
* @pathname: The string to evaluate. |
397 |
|
|
* |
398 |
|
|
* Returns path depth of the string. |
399 |
|
|
* |
400 |
|
|
* I score 2 for each of the '/' in the @pathname |
401 |
|
|
* and score 1 if the @pathname ends with '/'. |
402 |
|
|
*/ |
403 |
kumaneko |
2002 |
static int ccs_path_depth(const char *pathname) |
404 |
kumaneko |
111 |
{ |
405 |
|
|
int i = 0; |
406 |
|
|
if (pathname) { |
407 |
kumaneko |
1795 |
const char *ep = pathname + strlen(pathname); |
408 |
kumaneko |
111 |
if (pathname < ep--) { |
409 |
kumaneko |
1052 |
if (*ep != '/') |
410 |
|
|
i++; |
411 |
|
|
while (pathname <= ep) |
412 |
|
|
if (*ep-- == '/') |
413 |
|
|
i += 2; |
414 |
kumaneko |
111 |
} |
415 |
|
|
} |
416 |
|
|
return i; |
417 |
|
|
} |
418 |
|
|
|
419 |
kumaneko |
1052 |
/** |
420 |
kumaneko |
2002 |
* ccs_const_part_length - Evaluate the initial length without a pattern in a token. |
421 |
kumaneko |
1052 |
* |
422 |
|
|
* @filename: The string to evaluate. |
423 |
|
|
* |
424 |
kumaneko |
1064 |
* Returns the initial length without a pattern in @filename. |
425 |
kumaneko |
1052 |
*/ |
426 |
kumaneko |
2002 |
static int ccs_const_part_length(const char *filename) |
427 |
kumaneko |
111 |
{ |
428 |
kumaneko |
1052 |
char c; |
429 |
kumaneko |
111 |
int len = 0; |
430 |
kumaneko |
1052 |
if (!filename) |
431 |
|
|
return 0; |
432 |
kumaneko |
1747 |
while (1) { |
433 |
|
|
c = *filename++; |
434 |
|
|
if (!c) |
435 |
|
|
break; |
436 |
kumaneko |
1052 |
if (c != '\\') { |
437 |
|
|
len++; |
438 |
|
|
continue; |
439 |
kumaneko |
111 |
} |
440 |
kumaneko |
1052 |
c = *filename++; |
441 |
|
|
switch (c) { |
442 |
|
|
case '\\': /* "\\" */ |
443 |
|
|
len += 2; |
444 |
|
|
continue; |
445 |
|
|
case '0': /* "\ooo" */ |
446 |
|
|
case '1': |
447 |
|
|
case '2': |
448 |
|
|
case '3': |
449 |
|
|
c = *filename++; |
450 |
|
|
if (c < '0' || c > '7') |
451 |
|
|
break; |
452 |
|
|
c = *filename++; |
453 |
|
|
if (c < '0' || c > '7') |
454 |
|
|
break; |
455 |
|
|
len += 4; |
456 |
|
|
continue; |
457 |
|
|
} |
458 |
|
|
break; |
459 |
kumaneko |
111 |
} |
460 |
|
|
return len; |
461 |
|
|
} |
462 |
|
|
|
463 |
kumaneko |
1052 |
/** |
464 |
kumaneko |
2002 |
* ccs_fill_path_info - Fill in "struct ccs_path_info" members. |
465 |
kumaneko |
1052 |
* |
466 |
kumaneko |
2002 |
* @ptr: Pointer to "struct ccs_path_info" to fill in. |
467 |
kumaneko |
1052 |
* |
468 |
kumaneko |
2002 |
* The caller sets "struct ccs_path_info"->name. |
469 |
kumaneko |
1052 |
*/ |
470 |
kumaneko |
2002 |
void ccs_fill_path_info(struct ccs_path_info *ptr) |
471 |
kumaneko |
111 |
{ |
472 |
|
|
const char *name = ptr->name; |
473 |
|
|
const int len = strlen(name); |
474 |
|
|
ptr->total_len = len; |
475 |
kumaneko |
2002 |
ptr->const_len = ccs_const_part_length(name); |
476 |
kumaneko |
111 |
ptr->is_dir = len && (name[len - 1] == '/'); |
477 |
|
|
ptr->is_patterned = (ptr->const_len < len); |
478 |
|
|
ptr->hash = full_name_hash(name, len); |
479 |
kumaneko |
2002 |
ptr->depth = ccs_path_depth(name); |
480 |
kumaneko |
111 |
} |
481 |
|
|
|
482 |
kumaneko |
1052 |
/** |
483 |
kumaneko |
2039 |
* ccs_file_matches_pattern2 - Pattern matching without '/' character |
484 |
kumaneko |
1052 |
* and "\-" pattern. |
485 |
|
|
* |
486 |
|
|
* @filename: The start of string to check. |
487 |
|
|
* @filename_end: The end of string to check. |
488 |
|
|
* @pattern: The start of pattern to compare. |
489 |
|
|
* @pattern_end: The end of pattern to compare. |
490 |
|
|
* |
491 |
|
|
* Returns true if @filename matches @pattern, false otherwise. |
492 |
|
|
*/ |
493 |
kumaneko |
2039 |
static bool ccs_file_matches_pattern2(const char *filename, |
494 |
|
|
const char *filename_end, |
495 |
|
|
const char *pattern, |
496 |
|
|
const char *pattern_end) |
497 |
kumaneko |
111 |
{ |
498 |
|
|
while (filename < filename_end && pattern < pattern_end) { |
499 |
kumaneko |
1052 |
char c; |
500 |
kumaneko |
111 |
if (*pattern != '\\') { |
501 |
kumaneko |
1052 |
if (*filename++ != *pattern++) |
502 |
|
|
return false; |
503 |
|
|
continue; |
504 |
|
|
} |
505 |
|
|
c = *filename; |
506 |
|
|
pattern++; |
507 |
|
|
switch (*pattern) { |
508 |
kumaneko |
1064 |
int i; |
509 |
|
|
int j; |
510 |
kumaneko |
1052 |
case '?': |
511 |
|
|
if (c == '/') { |
512 |
|
|
return false; |
513 |
|
|
} else if (c == '\\') { |
514 |
|
|
if (filename[1] == '\\') |
515 |
|
|
filename++; |
516 |
kumaneko |
2002 |
else if (ccs_is_byte_range(filename + 1)) |
517 |
kumaneko |
1052 |
filename += 3; |
518 |
|
|
else |
519 |
kumaneko |
1006 |
return false; |
520 |
kumaneko |
1052 |
} |
521 |
|
|
break; |
522 |
|
|
case '\\': |
523 |
|
|
if (c != '\\') |
524 |
|
|
return false; |
525 |
|
|
if (*++filename != '\\') |
526 |
|
|
return false; |
527 |
|
|
break; |
528 |
|
|
case '+': |
529 |
kumaneko |
2002 |
if (!ccs_is_decimal(c)) |
530 |
kumaneko |
1052 |
return false; |
531 |
|
|
break; |
532 |
|
|
case 'x': |
533 |
kumaneko |
2002 |
if (!ccs_is_hexadecimal(c)) |
534 |
kumaneko |
1052 |
return false; |
535 |
|
|
break; |
536 |
|
|
case 'a': |
537 |
kumaneko |
2002 |
if (!ccs_is_alphabet_char(c)) |
538 |
kumaneko |
1052 |
return false; |
539 |
|
|
break; |
540 |
|
|
case '0': |
541 |
|
|
case '1': |
542 |
|
|
case '2': |
543 |
|
|
case '3': |
544 |
kumaneko |
2002 |
if (c == '\\' && ccs_is_byte_range(filename + 1) |
545 |
kumaneko |
1052 |
&& strncmp(filename + 1, pattern, 3) == 0) { |
546 |
|
|
filename += 3; |
547 |
|
|
pattern += 2; |
548 |
kumaneko |
111 |
break; |
549 |
kumaneko |
1052 |
} |
550 |
|
|
return false; /* Not matched. */ |
551 |
|
|
case '*': |
552 |
|
|
case '@': |
553 |
|
|
for (i = 0; i <= filename_end - filename; i++) { |
554 |
kumaneko |
2039 |
if (ccs_file_matches_pattern2(filename + i, |
555 |
|
|
filename_end, |
556 |
|
|
pattern + 1, |
557 |
|
|
pattern_end)) |
558 |
kumaneko |
1052 |
return true; |
559 |
|
|
c = filename[i]; |
560 |
|
|
if (c == '.' && *pattern == '@') |
561 |
kumaneko |
111 |
break; |
562 |
kumaneko |
1052 |
if (c != '\\') |
563 |
|
|
continue; |
564 |
|
|
if (filename[i + 1] == '\\') |
565 |
|
|
i++; |
566 |
kumaneko |
2002 |
else if (ccs_is_byte_range(filename + i + 1)) |
567 |
kumaneko |
1052 |
i += 3; |
568 |
|
|
else |
569 |
|
|
break; /* Bad pattern. */ |
570 |
kumaneko |
111 |
} |
571 |
kumaneko |
1052 |
return false; /* Not matched. */ |
572 |
|
|
default: |
573 |
|
|
j = 0; |
574 |
|
|
c = *pattern; |
575 |
|
|
if (c == '$') { |
576 |
kumaneko |
2002 |
while (ccs_is_decimal(filename[j])) |
577 |
kumaneko |
1052 |
j++; |
578 |
|
|
} else if (c == 'X') { |
579 |
kumaneko |
2002 |
while (ccs_is_hexadecimal(filename[j])) |
580 |
kumaneko |
1052 |
j++; |
581 |
|
|
} else if (c == 'A') { |
582 |
kumaneko |
2002 |
while (ccs_is_alphabet_char(filename[j])) |
583 |
kumaneko |
1052 |
j++; |
584 |
|
|
} |
585 |
|
|
for (i = 1; i <= j; i++) { |
586 |
kumaneko |
2039 |
if (ccs_file_matches_pattern2(filename + i, |
587 |
|
|
filename_end, |
588 |
|
|
pattern + 1, |
589 |
|
|
pattern_end)) |
590 |
kumaneko |
1052 |
return true; |
591 |
|
|
} |
592 |
|
|
return false; /* Not matched or bad pattern. */ |
593 |
kumaneko |
111 |
} |
594 |
kumaneko |
1052 |
filename++; |
595 |
|
|
pattern++; |
596 |
kumaneko |
111 |
} |
597 |
kumaneko |
1052 |
while (*pattern == '\\' && |
598 |
|
|
(*(pattern + 1) == '*' || *(pattern + 1) == '@')) |
599 |
|
|
pattern += 2; |
600 |
kumaneko |
1468 |
return filename == filename_end && pattern == pattern_end; |
601 |
kumaneko |
111 |
} |
602 |
|
|
|
603 |
kumaneko |
1052 |
/** |
604 |
kumaneko |
2039 |
* ccs_file_matches_pattern - Pattern matching without without '/' character. |
605 |
kumaneko |
1052 |
* |
606 |
|
|
* @filename: The start of string to check. |
607 |
|
|
* @filename_end: The end of string to check. |
608 |
|
|
* @pattern: The start of pattern to compare. |
609 |
|
|
* @pattern_end: The end of pattern to compare. |
610 |
|
|
* |
611 |
|
|
* Returns true if @filename matches @pattern, false otherwise. |
612 |
|
|
*/ |
613 |
kumaneko |
2039 |
static bool ccs_file_matches_pattern(const char *filename, |
614 |
|
|
const char *filename_end, |
615 |
|
|
const char *pattern, |
616 |
|
|
const char *pattern_end) |
617 |
kumaneko |
206 |
{ |
618 |
|
|
const char *pattern_start = pattern; |
619 |
kumaneko |
1006 |
bool first = true; |
620 |
|
|
bool result; |
621 |
kumaneko |
206 |
while (pattern < pattern_end - 1) { |
622 |
kumaneko |
1052 |
/* Split at "\-" pattern. */ |
623 |
|
|
if (*pattern++ != '\\' || *pattern++ != '-') |
624 |
|
|
continue; |
625 |
kumaneko |
2039 |
result = ccs_file_matches_pattern2(filename, filename_end, |
626 |
kumaneko |
2040 |
pattern_start, pattern - 2); |
627 |
kumaneko |
1052 |
if (first) |
628 |
|
|
result = !result; |
629 |
|
|
if (result) |
630 |
|
|
return false; |
631 |
kumaneko |
1006 |
first = false; |
632 |
kumaneko |
206 |
pattern_start = pattern; |
633 |
|
|
} |
634 |
kumaneko |
2039 |
result = ccs_file_matches_pattern2(filename, filename_end, |
635 |
|
|
pattern_start, pattern_end); |
636 |
kumaneko |
206 |
return first ? result : !result; |
637 |
|
|
} |
638 |
|
|
|
639 |
kumaneko |
1052 |
/** |
640 |
kumaneko |
1054 |
* ccs_path_matches_pattern - Check whether the given filename matches the given pattern. |
641 |
kumaneko |
1052 |
* @filename: The filename to check. |
642 |
|
|
* @pattern: The pattern to compare. |
643 |
kumaneko |
111 |
* |
644 |
kumaneko |
1052 |
* Returns true if matches, false otherwise. |
645 |
|
|
* |
646 |
|
|
* The following patterns are available. |
647 |
|
|
* \\ \ itself. |
648 |
|
|
* \ooo Octal representation of a byte. |
649 |
|
|
* \* More than or equals to 0 character other than '/'. |
650 |
|
|
* \@ More than or equals to 0 character other than '/' or '.'. |
651 |
|
|
* \? 1 byte character other than '/'. |
652 |
|
|
* \$ More than or equals to 1 decimal digit. |
653 |
|
|
* \+ 1 decimal digit. |
654 |
|
|
* \X More than or equals to 1 hexadecimal digit. |
655 |
|
|
* \x 1 hexadecimal digit. |
656 |
|
|
* \A More than or equals to 1 alphabet character. |
657 |
|
|
* \a 1 alphabet character. |
658 |
|
|
* \- Subtraction operator. |
659 |
kumaneko |
111 |
*/ |
660 |
kumaneko |
2002 |
bool ccs_path_matches_pattern(const struct ccs_path_info *filename, |
661 |
|
|
const struct ccs_path_info *pattern) |
662 |
kumaneko |
111 |
{ |
663 |
kumaneko |
1052 |
/* |
664 |
|
|
if (!filename || !pattern) |
665 |
|
|
return false; |
666 |
|
|
*/ |
667 |
|
|
const char *f = filename->name; |
668 |
|
|
const char *p = pattern->name; |
669 |
|
|
const int len = pattern->const_len; |
670 |
|
|
/* If @pattern doesn't contain pattern, I can use strcmp(). */ |
671 |
|
|
if (!pattern->is_patterned) |
672 |
|
|
return !ccs_pathcmp(filename, pattern); |
673 |
|
|
/* Dont compare if the number of '/' differs. */ |
674 |
|
|
if (filename->depth != pattern->depth) |
675 |
|
|
return false; |
676 |
|
|
/* Compare the initial length without patterns. */ |
677 |
|
|
if (strncmp(f, p, len)) |
678 |
|
|
return false; |
679 |
|
|
f += len; |
680 |
|
|
p += len; |
681 |
|
|
/* Main loop. Compare each directory component. */ |
682 |
|
|
while (*f && *p) { |
683 |
|
|
const char *f_delimiter = strchr(f, '/'); |
684 |
|
|
const char *p_delimiter = strchr(p, '/'); |
685 |
|
|
if (!f_delimiter) |
686 |
kumaneko |
1795 |
f_delimiter = f + strlen(f); |
687 |
kumaneko |
1052 |
if (!p_delimiter) |
688 |
kumaneko |
1795 |
p_delimiter = p + strlen(p); |
689 |
kumaneko |
2040 |
if (!ccs_file_matches_pattern(f, f_delimiter, p, p_delimiter)) |
690 |
kumaneko |
1052 |
return false; |
691 |
|
|
f = f_delimiter; |
692 |
|
|
if (*f) |
693 |
|
|
f++; |
694 |
|
|
p = p_delimiter; |
695 |
|
|
if (*p) |
696 |
|
|
p++; |
697 |
kumaneko |
111 |
} |
698 |
kumaneko |
1052 |
/* Ignore trailing "\*" and "\@" in @pattern. */ |
699 |
|
|
while (*p == '\\' && |
700 |
|
|
(*(p + 1) == '*' || *(p + 1) == '@')) |
701 |
|
|
p += 2; |
702 |
kumaneko |
1468 |
return !*f && !*p; |
703 |
kumaneko |
111 |
} |
704 |
|
|
|
705 |
kumaneko |
1052 |
/** |
706 |
|
|
* ccs_get_exe - Get ccs_realpath() of current process. |
707 |
|
|
* |
708 |
|
|
* Returns the ccs_realpath() of current process on success, NULL otherwise. |
709 |
|
|
* |
710 |
kumaneko |
2711 |
* This function uses kzalloc(), so the caller must kfree() |
711 |
kumaneko |
1052 |
* if this function didn't return NULL. |
712 |
kumaneko |
111 |
*/ |
713 |
kumaneko |
1052 |
const char *ccs_get_exe(void) |
714 |
kumaneko |
111 |
{ |
715 |
kumaneko |
737 |
struct mm_struct *mm = current->mm; |
716 |
|
|
struct vm_area_struct *vma; |
717 |
|
|
const char *cp = NULL; |
718 |
kumaneko |
1052 |
if (!mm) |
719 |
|
|
return NULL; |
720 |
kumaneko |
737 |
down_read(&mm->mmap_sem); |
721 |
|
|
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
722 |
|
|
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
723 |
kumaneko |
1052 |
cp = ccs_realpath_from_dentry(vma->vm_file->f_dentry, |
724 |
|
|
vma->vm_file->f_vfsmnt); |
725 |
kumaneko |
737 |
break; |
726 |
kumaneko |
111 |
} |
727 |
|
|
} |
728 |
kumaneko |
737 |
up_read(&mm->mmap_sem); |
729 |
|
|
return cp; |
730 |
kumaneko |
111 |
} |
731 |
|
|
|
732 |
kumaneko |
1052 |
/** |
733 |
|
|
* ccs_get_msg - Get warning message. |
734 |
|
|
* |
735 |
|
|
* @is_enforce: Is it enforcing mode? |
736 |
|
|
* |
737 |
|
|
* Returns "ERROR" or "WARNING". |
738 |
|
|
*/ |
739 |
|
|
const char *ccs_get_msg(const bool is_enforce) |
740 |
kumaneko |
111 |
{ |
741 |
kumaneko |
1052 |
if (is_enforce) |
742 |
|
|
return "ERROR"; |
743 |
|
|
else |
744 |
|
|
return "WARNING"; |
745 |
kumaneko |
111 |
} |
746 |
|
|
|
747 |
kumaneko |
1052 |
/** |
748 |
kumaneko |
1657 |
* ccs_can_sleep - Check whether it is permitted to do operations that may sleep. |
749 |
kumaneko |
1052 |
* |
750 |
|
|
* Returns true if it is permitted to do operations that may sleep, |
751 |
|
|
* false otherwise. |
752 |
|
|
* |
753 |
|
|
* TOMOYO Linux supports interactive enforcement that lets processes |
754 |
|
|
* wait for the administrator's decision. |
755 |
|
|
* All hooks but the one for ccs_may_autobind() are inserted where |
756 |
|
|
* it is permitted to do operations that may sleep. |
757 |
|
|
* Thus, this warning should not happen. |
758 |
|
|
*/ |
759 |
kumaneko |
1657 |
bool ccs_can_sleep(void) |
760 |
kumaneko |
899 |
{ |
761 |
kumaneko |
1052 |
static u8 count = 20; |
762 |
|
|
if (likely(!in_interrupt())) |
763 |
|
|
return true; |
764 |
|
|
if (count) { |
765 |
|
|
count--; |
766 |
|
|
printk(KERN_ERR "BUG: sleeping function called " |
767 |
|
|
"from invalid context.\n"); |
768 |
|
|
dump_stack(); |
769 |
kumaneko |
899 |
} |
770 |
kumaneko |
1052 |
return false; |
771 |
kumaneko |
899 |
} |
772 |
|
|
|
773 |
kumaneko |
1052 |
/** |
774 |
|
|
* ccs_check_flags - Check mode for specified functionality. |
775 |
|
|
* |
776 |
kumaneko |
2282 |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
777 |
kumaneko |
1657 |
* @index: The functionality to check mode. |
778 |
kumaneko |
1052 |
* |
779 |
|
|
* Returns the mode of specified functionality. |
780 |
|
|
*/ |
781 |
kumaneko |
2282 |
unsigned int ccs_check_flags(const struct ccs_domain_info *domain, |
782 |
|
|
const u8 index) |
783 |
kumaneko |
1015 |
{ |
784 |
kumaneko |
1657 |
u8 profile; |
785 |
|
|
if (!domain) |
786 |
kumaneko |
2282 |
domain = ccs_current_domain(); |
787 |
kumaneko |
1657 |
profile = domain->profile; |
788 |
kumaneko |
2040 |
return ccs_policy_loaded && index < CCS_MAX_CONTROL_INDEX |
789 |
kumaneko |
1657 |
#if MAX_PROFILES != 256 |
790 |
|
|
&& profile < MAX_PROFILES |
791 |
|
|
#endif |
792 |
kumaneko |
2002 |
&& ccs_profile_ptr[profile] ? |
793 |
|
|
ccs_profile_ptr[profile]->value[index] : 0; |
794 |
kumaneko |
1015 |
} |
795 |
|
|
|
796 |
kumaneko |
1052 |
/** |
797 |
|
|
* ccs_check_capability_flags - Check mode for specified capability. |
798 |
|
|
* |
799 |
kumaneko |
2282 |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
800 |
kumaneko |
1657 |
* @index: The capability to check mode. |
801 |
kumaneko |
1052 |
* |
802 |
|
|
* Returns the mode of specified capability. |
803 |
|
|
*/ |
804 |
kumaneko |
2282 |
static u8 ccs_check_capability_flags(const struct ccs_domain_info *domain, |
805 |
kumaneko |
1657 |
const u8 index) |
806 |
kumaneko |
1015 |
{ |
807 |
kumaneko |
1657 |
const u8 profile = domain ? domain->profile : |
808 |
kumaneko |
2282 |
ccs_current_domain()->profile; |
809 |
|
|
return ccs_policy_loaded && index < CCS_MAX_CAPABILITY_INDEX |
810 |
kumaneko |
1015 |
#if MAX_PROFILES != 256 |
811 |
|
|
&& profile < MAX_PROFILES |
812 |
|
|
#endif |
813 |
kumaneko |
2002 |
&& ccs_profile_ptr[profile] ? |
814 |
|
|
ccs_profile_ptr[profile]->capability_value[index] : 0; |
815 |
kumaneko |
1015 |
} |
816 |
|
|
|
817 |
kumaneko |
1052 |
/** |
818 |
|
|
* ccs_cap2keyword - Convert capability operation to capability name. |
819 |
|
|
* |
820 |
|
|
* @operation: The capability index. |
821 |
|
|
* |
822 |
|
|
* Returns the name of the specified capability's name. |
823 |
|
|
*/ |
824 |
|
|
const char *ccs_cap2keyword(const u8 operation) |
825 |
kumaneko |
1015 |
{ |
826 |
kumaneko |
2282 |
return operation < CCS_MAX_CAPABILITY_INDEX |
827 |
kumaneko |
2002 |
? ccs_capability_control_keyword[operation] : NULL; |
828 |
kumaneko |
1015 |
} |
829 |
|
|
|
830 |
kumaneko |
1052 |
/** |
831 |
kumaneko |
1657 |
* ccs_init_request_info - Initialize "struct ccs_request_info" members. |
832 |
|
|
* |
833 |
|
|
* @r: Pointer to "struct ccs_request_info" to initialize. |
834 |
kumaneko |
2282 |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
835 |
kumaneko |
1657 |
* @index: Index number of functionality. |
836 |
|
|
*/ |
837 |
|
|
void ccs_init_request_info(struct ccs_request_info *r, |
838 |
kumaneko |
2282 |
struct ccs_domain_info *domain, const u8 index) |
839 |
kumaneko |
1657 |
{ |
840 |
|
|
memset(r, 0, sizeof(*r)); |
841 |
|
|
if (!domain) |
842 |
kumaneko |
2282 |
domain = ccs_current_domain(); |
843 |
kumaneko |
2690 |
r->domain = domain; |
844 |
kumaneko |
1657 |
r->profile = domain->profile; |
845 |
|
|
if (index < CCS_MAX_CONTROL_INDEX) |
846 |
|
|
r->mode = ccs_check_flags(domain, index); |
847 |
|
|
else |
848 |
|
|
r->mode = ccs_check_capability_flags(domain, index |
849 |
|
|
- CCS_MAX_CONTROL_INDEX); |
850 |
|
|
} |
851 |
|
|
|
852 |
|
|
/** |
853 |
kumaneko |
1052 |
* ccs_verbose_mode - Check whether TOMOYO is verbose mode. |
854 |
|
|
* |
855 |
kumaneko |
2282 |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
856 |
kumaneko |
1657 |
* |
857 |
kumaneko |
1052 |
* Returns true if domain policy violation warning should be printed to |
858 |
|
|
* console. |
859 |
|
|
*/ |
860 |
kumaneko |
2282 |
bool ccs_verbose_mode(const struct ccs_domain_info *domain) |
861 |
kumaneko |
111 |
{ |
862 |
kumaneko |
2282 |
return ccs_check_flags(domain, CCS_VERBOSE) != 0; |
863 |
kumaneko |
111 |
} |
864 |
|
|
|
865 |
kumaneko |
1052 |
/** |
866 |
kumaneko |
2209 |
* ccs_domain_quota_ok - Check for domain's quota. |
867 |
kumaneko |
1052 |
* |
868 |
kumaneko |
2780 |
* @r: Pointer to "struct ccs_request_info". |
869 |
kumaneko |
1052 |
* |
870 |
|
|
* Returns true if the domain is not exceeded quota, false otherwise. |
871 |
kumaneko |
2690 |
* |
872 |
kumaneko |
2828 |
* Caller holds ccs_read_lock(). |
873 |
kumaneko |
1052 |
*/ |
874 |
kumaneko |
2780 |
bool ccs_domain_quota_ok(struct ccs_request_info *r) |
875 |
kumaneko |
512 |
{ |
876 |
|
|
unsigned int count = 0; |
877 |
kumaneko |
2780 |
struct ccs_domain_info *domain = r->domain; |
878 |
kumaneko |
2002 |
struct ccs_acl_info *ptr; |
879 |
kumaneko |
2828 |
ccs_check_read_lock(); |
880 |
kumaneko |
2780 |
if (r->mode != 1) |
881 |
|
|
return false; |
882 |
kumaneko |
1052 |
if (!domain) |
883 |
|
|
return true; |
884 |
kumaneko |
2690 |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
885 |
kumaneko |
1064 |
if (ptr->type & ACL_DELETED) |
886 |
|
|
continue; |
887 |
kumaneko |
2692 |
switch (ccs_acl_type2(ptr)) { |
888 |
kumaneko |
2002 |
struct ccs_single_path_acl_record *acl1; |
889 |
|
|
struct ccs_double_path_acl_record *acl2; |
890 |
kumaneko |
1064 |
u16 perm; |
891 |
|
|
case TYPE_SINGLE_PATH_ACL: |
892 |
kumaneko |
2002 |
acl1 = container_of(ptr, |
893 |
|
|
struct ccs_single_path_acl_record, |
894 |
kumaneko |
1064 |
head); |
895 |
|
|
perm = acl1->perm; |
896 |
|
|
if (perm & (1 << TYPE_EXECUTE_ACL)) |
897 |
|
|
count++; |
898 |
|
|
if (perm & |
899 |
|
|
((1 << TYPE_READ_ACL) | (1 << TYPE_WRITE_ACL))) |
900 |
|
|
count++; |
901 |
|
|
if (perm & (1 << TYPE_CREATE_ACL)) |
902 |
|
|
count++; |
903 |
|
|
if (perm & (1 << TYPE_UNLINK_ACL)) |
904 |
|
|
count++; |
905 |
|
|
if (perm & (1 << TYPE_MKDIR_ACL)) |
906 |
|
|
count++; |
907 |
|
|
if (perm & (1 << TYPE_RMDIR_ACL)) |
908 |
|
|
count++; |
909 |
|
|
if (perm & (1 << TYPE_MKFIFO_ACL)) |
910 |
|
|
count++; |
911 |
|
|
if (perm & (1 << TYPE_MKSOCK_ACL)) |
912 |
|
|
count++; |
913 |
|
|
if (perm & (1 << TYPE_MKBLOCK_ACL)) |
914 |
|
|
count++; |
915 |
|
|
if (perm & (1 << TYPE_MKCHAR_ACL)) |
916 |
|
|
count++; |
917 |
|
|
if (perm & (1 << TYPE_TRUNCATE_ACL)) |
918 |
|
|
count++; |
919 |
|
|
if (perm & (1 << TYPE_SYMLINK_ACL)) |
920 |
|
|
count++; |
921 |
|
|
if (perm & (1 << TYPE_REWRITE_ACL)) |
922 |
|
|
count++; |
923 |
|
|
break; |
924 |
|
|
case TYPE_DOUBLE_PATH_ACL: |
925 |
kumaneko |
2002 |
acl2 = container_of(ptr, |
926 |
|
|
struct ccs_double_path_acl_record, |
927 |
kumaneko |
1064 |
head); |
928 |
|
|
perm = acl2->perm; |
929 |
|
|
if (perm & (1 << TYPE_LINK_ACL)) |
930 |
|
|
count++; |
931 |
|
|
if (perm & (1 << TYPE_RENAME_ACL)) |
932 |
|
|
count++; |
933 |
|
|
break; |
934 |
|
|
case TYPE_EXECUTE_HANDLER: |
935 |
|
|
case TYPE_DENIED_EXECUTE_HANDLER: |
936 |
|
|
break; |
937 |
|
|
default: |
938 |
kumaneko |
1052 |
count++; |
939 |
kumaneko |
1064 |
} |
940 |
kumaneko |
512 |
} |
941 |
kumaneko |
2282 |
if (count < ccs_check_flags(domain, CCS_MAX_ACCEPT_ENTRY)) |
942 |
kumaneko |
2692 |
return true; |
943 |
|
|
if (!domain->quota_warned) { |
944 |
kumaneko |
1006 |
domain->quota_warned = true; |
945 |
kumaneko |
1052 |
printk(KERN_WARNING "TOMOYO-WARNING: " |
946 |
|
|
"Domain '%s' has so many ACLs to hold. " |
947 |
|
|
"Stopped learning mode.\n", domain->domainname->name); |
948 |
kumaneko |
512 |
} |
949 |
kumaneko |
2692 |
return false; |
950 |
kumaneko |
512 |
} |