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e114e473 CS |
1 | /* |
2 | * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, version 2. | |
7 | * | |
8 | * Authors: | |
9 | * Casey Schaufler <casey@schaufler-ca.com> | |
10 | * Ahmed S. Darwish <darwish.07@gmail.com> | |
11 | * | |
12 | * Special thanks to the authors of selinuxfs. | |
13 | * | |
14 | * Karl MacMillan <kmacmillan@tresys.com> | |
15 | * James Morris <jmorris@redhat.com> | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/security.h> | |
22 | #include <linux/mutex.h> | |
6d3dc07c | 23 | #include <net/net_namespace.h> |
e114e473 CS |
24 | #include <net/netlabel.h> |
25 | #include <net/cipso_ipv4.h> | |
26 | #include <linux/seq_file.h> | |
27 | #include <linux/ctype.h> | |
4bc87e62 | 28 | #include <linux/audit.h> |
e114e473 CS |
29 | #include "smack.h" |
30 | ||
31 | /* | |
32 | * smackfs pseudo filesystem. | |
33 | */ | |
34 | ||
35 | enum smk_inos { | |
36 | SMK_ROOT_INO = 2, | |
37 | SMK_LOAD = 3, /* load policy */ | |
38 | SMK_CIPSO = 4, /* load label -> CIPSO mapping */ | |
39 | SMK_DOI = 5, /* CIPSO DOI */ | |
40 | SMK_DIRECT = 6, /* CIPSO level indicating direct label */ | |
41 | SMK_AMBIENT = 7, /* internet ambient label */ | |
6d3dc07c | 42 | SMK_NETLBLADDR = 8, /* single label hosts */ |
15446235 | 43 | SMK_ONLYCAP = 9, /* the only "capable" label */ |
e114e473 CS |
44 | }; |
45 | ||
46 | /* | |
47 | * List locks | |
48 | */ | |
49 | static DEFINE_MUTEX(smack_list_lock); | |
50 | static DEFINE_MUTEX(smack_cipso_lock); | |
4bc87e62 | 51 | static DEFINE_MUTEX(smack_ambient_lock); |
6d3dc07c | 52 | static DEFINE_MUTEX(smk_netlbladdr_lock); |
e114e473 CS |
53 | |
54 | /* | |
55 | * This is the "ambient" label for network traffic. | |
56 | * If it isn't somehow marked, use this. | |
57 | * It can be reset via smackfs/ambient | |
58 | */ | |
59 | char *smack_net_ambient = smack_known_floor.smk_known; | |
60 | ||
e114e473 CS |
61 | /* |
62 | * This is the level in a CIPSO header that indicates a | |
63 | * smack label is contained directly in the category set. | |
64 | * It can be reset via smackfs/direct | |
65 | */ | |
66 | int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT; | |
67 | ||
15446235 CS |
68 | /* |
69 | * Unless a process is running with this label even | |
70 | * having CAP_MAC_OVERRIDE isn't enough to grant | |
71 | * privilege to violate MAC policy. If no label is | |
72 | * designated (the NULL case) capabilities apply to | |
73 | * everyone. It is expected that the hat (^) label | |
74 | * will be used if any label is used. | |
75 | */ | |
76 | char *smack_onlycap; | |
77 | ||
6d3dc07c CS |
78 | /* |
79 | * Certain IP addresses may be designated as single label hosts. | |
80 | * Packets are sent there unlabeled, but only from tasks that | |
81 | * can write to the specified label. | |
82 | */ | |
83 | struct smk_netlbladdr *smack_netlbladdrs; | |
84 | ||
e114e473 CS |
85 | static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT; |
86 | struct smk_list_entry *smack_list; | |
87 | ||
88 | #define SEQ_READ_FINISHED 1 | |
89 | ||
e114e473 CS |
90 | /* |
91 | * Values for parsing cipso rules | |
92 | * SMK_DIGITLEN: Length of a digit field in a rule. | |
b500ce8d AD |
93 | * SMK_CIPSOMIN: Minimum possible cipso rule length. |
94 | * SMK_CIPSOMAX: Maximum possible cipso rule length. | |
e114e473 CS |
95 | */ |
96 | #define SMK_DIGITLEN 4 | |
b500ce8d AD |
97 | #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN) |
98 | #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN) | |
99 | ||
100 | /* | |
101 | * Values for parsing MAC rules | |
102 | * SMK_ACCESS: Maximum possible combination of access permissions | |
103 | * SMK_ACCESSLEN: Maximum length for a rule access field | |
104 | * SMK_LOADLEN: Smack rule length | |
105 | */ | |
106 | #define SMK_ACCESS "rwxa" | |
107 | #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1) | |
108 | #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN) | |
109 | ||
6d3dc07c CS |
110 | /** |
111 | * smk_netlabel_audit_set - fill a netlbl_audit struct | |
112 | * @nap: structure to fill | |
113 | */ | |
114 | static void smk_netlabel_audit_set(struct netlbl_audit *nap) | |
115 | { | |
116 | nap->loginuid = audit_get_loginuid(current); | |
117 | nap->sessionid = audit_get_sessionid(current); | |
118 | nap->secid = smack_to_secid(current_security()); | |
119 | } | |
120 | ||
121 | /* | |
122 | * Values for parsing single label host rules | |
123 | * "1.2.3.4 X" | |
124 | * "192.168.138.129/32 abcdefghijklmnopqrstuvw" | |
125 | */ | |
126 | #define SMK_NETLBLADDRMIN 9 | |
127 | #define SMK_NETLBLADDRMAX 42 | |
e114e473 CS |
128 | |
129 | /* | |
130 | * Seq_file read operations for /smack/load | |
131 | */ | |
132 | ||
133 | static void *load_seq_start(struct seq_file *s, loff_t *pos) | |
134 | { | |
135 | if (*pos == SEQ_READ_FINISHED) | |
136 | return NULL; | |
137 | ||
138 | return smack_list; | |
139 | } | |
140 | ||
141 | static void *load_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
142 | { | |
143 | struct smk_list_entry *skp = ((struct smk_list_entry *) v)->smk_next; | |
144 | ||
145 | if (skp == NULL) | |
146 | *pos = SEQ_READ_FINISHED; | |
147 | ||
148 | return skp; | |
149 | } | |
150 | ||
151 | static int load_seq_show(struct seq_file *s, void *v) | |
152 | { | |
153 | struct smk_list_entry *slp = (struct smk_list_entry *) v; | |
154 | struct smack_rule *srp = &slp->smk_rule; | |
155 | ||
156 | seq_printf(s, "%s %s", (char *)srp->smk_subject, | |
157 | (char *)srp->smk_object); | |
158 | ||
159 | seq_putc(s, ' '); | |
160 | ||
161 | if (srp->smk_access & MAY_READ) | |
162 | seq_putc(s, 'r'); | |
163 | if (srp->smk_access & MAY_WRITE) | |
164 | seq_putc(s, 'w'); | |
165 | if (srp->smk_access & MAY_EXEC) | |
166 | seq_putc(s, 'x'); | |
167 | if (srp->smk_access & MAY_APPEND) | |
168 | seq_putc(s, 'a'); | |
169 | if (srp->smk_access == 0) | |
170 | seq_putc(s, '-'); | |
171 | ||
172 | seq_putc(s, '\n'); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static void load_seq_stop(struct seq_file *s, void *v) | |
178 | { | |
179 | /* No-op */ | |
180 | } | |
181 | ||
182 | static struct seq_operations load_seq_ops = { | |
183 | .start = load_seq_start, | |
184 | .next = load_seq_next, | |
185 | .show = load_seq_show, | |
186 | .stop = load_seq_stop, | |
187 | }; | |
188 | ||
189 | /** | |
190 | * smk_open_load - open() for /smack/load | |
191 | * @inode: inode structure representing file | |
192 | * @file: "load" file pointer | |
193 | * | |
194 | * For reading, use load_seq_* seq_file reading operations. | |
195 | */ | |
196 | static int smk_open_load(struct inode *inode, struct file *file) | |
197 | { | |
cb622bbb | 198 | return seq_open(file, &load_seq_ops); |
e114e473 CS |
199 | } |
200 | ||
201 | /** | |
202 | * smk_set_access - add a rule to the rule list | |
203 | * @srp: the new rule to add | |
204 | * | |
205 | * Looks through the current subject/object/access list for | |
206 | * the subject/object pair and replaces the access that was | |
207 | * there. If the pair isn't found add it with the specified | |
208 | * access. | |
81ea714b SL |
209 | * |
210 | * Returns 0 if nothing goes wrong or -ENOMEM if it fails | |
211 | * during the allocation of the new pair to add. | |
e114e473 | 212 | */ |
81ea714b | 213 | static int smk_set_access(struct smack_rule *srp) |
e114e473 CS |
214 | { |
215 | struct smk_list_entry *sp; | |
216 | struct smk_list_entry *newp; | |
81ea714b | 217 | int ret = 0; |
e114e473 CS |
218 | |
219 | mutex_lock(&smack_list_lock); | |
220 | ||
221 | for (sp = smack_list; sp != NULL; sp = sp->smk_next) | |
222 | if (sp->smk_rule.smk_subject == srp->smk_subject && | |
223 | sp->smk_rule.smk_object == srp->smk_object) { | |
224 | sp->smk_rule.smk_access = srp->smk_access; | |
225 | break; | |
226 | } | |
227 | ||
228 | if (sp == NULL) { | |
229 | newp = kzalloc(sizeof(struct smk_list_entry), GFP_KERNEL); | |
81ea714b SL |
230 | if (newp == NULL) { |
231 | ret = -ENOMEM; | |
232 | goto out; | |
233 | } | |
234 | ||
e114e473 CS |
235 | newp->smk_rule = *srp; |
236 | newp->smk_next = smack_list; | |
237 | smack_list = newp; | |
238 | } | |
239 | ||
81ea714b | 240 | out: |
e114e473 CS |
241 | mutex_unlock(&smack_list_lock); |
242 | ||
81ea714b | 243 | return ret; |
e114e473 CS |
244 | } |
245 | ||
246 | /** | |
247 | * smk_write_load - write() for /smack/load | |
248 | * @filp: file pointer, not actually used | |
249 | * @buf: where to get the data from | |
250 | * @count: bytes sent | |
251 | * @ppos: where to start - must be 0 | |
252 | * | |
253 | * Get one smack access rule from above. | |
254 | * The format is exactly: | |
255 | * char subject[SMK_LABELLEN] | |
256 | * char object[SMK_LABELLEN] | |
b500ce8d | 257 | * char access[SMK_ACCESSLEN] |
e114e473 | 258 | * |
b500ce8d | 259 | * writes must be SMK_LABELLEN+SMK_LABELLEN+SMK_ACCESSLEN bytes. |
e114e473 | 260 | */ |
e114e473 CS |
261 | static ssize_t smk_write_load(struct file *file, const char __user *buf, |
262 | size_t count, loff_t *ppos) | |
263 | { | |
264 | struct smack_rule rule; | |
265 | char *data; | |
266 | int rc = -EINVAL; | |
267 | ||
268 | /* | |
269 | * Must have privilege. | |
270 | * No partial writes. | |
271 | * Enough data must be present. | |
272 | */ | |
273 | if (!capable(CAP_MAC_ADMIN)) | |
274 | return -EPERM; | |
275 | if (*ppos != 0) | |
276 | return -EINVAL; | |
b500ce8d | 277 | if (count != SMK_LOADLEN) |
e114e473 CS |
278 | return -EINVAL; |
279 | ||
280 | data = kzalloc(count, GFP_KERNEL); | |
281 | if (data == NULL) | |
282 | return -ENOMEM; | |
283 | ||
284 | if (copy_from_user(data, buf, count) != 0) { | |
285 | rc = -EFAULT; | |
286 | goto out; | |
287 | } | |
288 | ||
289 | rule.smk_subject = smk_import(data, 0); | |
290 | if (rule.smk_subject == NULL) | |
291 | goto out; | |
292 | ||
293 | rule.smk_object = smk_import(data + SMK_LABELLEN, 0); | |
294 | if (rule.smk_object == NULL) | |
295 | goto out; | |
296 | ||
297 | rule.smk_access = 0; | |
298 | ||
299 | switch (data[SMK_LABELLEN + SMK_LABELLEN]) { | |
300 | case '-': | |
301 | break; | |
302 | case 'r': | |
303 | case 'R': | |
304 | rule.smk_access |= MAY_READ; | |
305 | break; | |
306 | default: | |
307 | goto out; | |
308 | } | |
309 | ||
310 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 1]) { | |
311 | case '-': | |
312 | break; | |
313 | case 'w': | |
314 | case 'W': | |
315 | rule.smk_access |= MAY_WRITE; | |
316 | break; | |
317 | default: | |
318 | goto out; | |
319 | } | |
320 | ||
321 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 2]) { | |
322 | case '-': | |
323 | break; | |
324 | case 'x': | |
325 | case 'X': | |
326 | rule.smk_access |= MAY_EXEC; | |
327 | break; | |
328 | default: | |
329 | goto out; | |
330 | } | |
331 | ||
332 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 3]) { | |
333 | case '-': | |
334 | break; | |
335 | case 'a': | |
336 | case 'A': | |
152a649b | 337 | rule.smk_access |= MAY_APPEND; |
e114e473 CS |
338 | break; |
339 | default: | |
340 | goto out; | |
341 | } | |
342 | ||
81ea714b SL |
343 | rc = smk_set_access(&rule); |
344 | ||
345 | if (!rc) | |
346 | rc = count; | |
e114e473 CS |
347 | |
348 | out: | |
349 | kfree(data); | |
350 | return rc; | |
351 | } | |
352 | ||
353 | static const struct file_operations smk_load_ops = { | |
354 | .open = smk_open_load, | |
355 | .read = seq_read, | |
356 | .llseek = seq_lseek, | |
357 | .write = smk_write_load, | |
cb622bbb | 358 | .release = seq_release, |
e114e473 CS |
359 | }; |
360 | ||
361 | /** | |
362 | * smk_cipso_doi - initialize the CIPSO domain | |
363 | */ | |
30aa4faf | 364 | static void smk_cipso_doi(void) |
e114e473 CS |
365 | { |
366 | int rc; | |
367 | struct cipso_v4_doi *doip; | |
6d3dc07c | 368 | struct netlbl_audit nai; |
e114e473 | 369 | |
6d3dc07c | 370 | smk_netlabel_audit_set(&nai); |
4bc87e62 | 371 | |
6d3dc07c | 372 | rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai); |
e114e473 CS |
373 | if (rc != 0) |
374 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
375 | __func__, __LINE__, rc); | |
376 | ||
377 | doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); | |
378 | if (doip == NULL) | |
379 | panic("smack: Failed to initialize cipso DOI.\n"); | |
380 | doip->map.std = NULL; | |
381 | doip->doi = smk_cipso_doi_value; | |
382 | doip->type = CIPSO_V4_MAP_PASS; | |
383 | doip->tags[0] = CIPSO_V4_TAG_RBITMAP; | |
384 | for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++) | |
385 | doip->tags[rc] = CIPSO_V4_TAG_INVALID; | |
386 | ||
6d3dc07c | 387 | rc = netlbl_cfg_cipsov4_add(doip, &nai); |
b1edeb10 | 388 | if (rc != 0) { |
6c2e8ac0 PM |
389 | printk(KERN_WARNING "%s:%d cipso add rc = %d\n", |
390 | __func__, __LINE__, rc); | |
391 | kfree(doip); | |
392 | return; | |
393 | } | |
6d3dc07c | 394 | rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai); |
6c2e8ac0 PM |
395 | if (rc != 0) { |
396 | printk(KERN_WARNING "%s:%d map add rc = %d\n", | |
e114e473 | 397 | __func__, __LINE__, rc); |
b1edeb10 | 398 | kfree(doip); |
6c2e8ac0 | 399 | return; |
b1edeb10 | 400 | } |
e114e473 CS |
401 | } |
402 | ||
4bc87e62 CS |
403 | /** |
404 | * smk_unlbl_ambient - initialize the unlabeled domain | |
405 | */ | |
30aa4faf | 406 | static void smk_unlbl_ambient(char *oldambient) |
4bc87e62 CS |
407 | { |
408 | int rc; | |
6d3dc07c | 409 | struct netlbl_audit nai; |
4bc87e62 | 410 | |
6d3dc07c | 411 | smk_netlabel_audit_set(&nai); |
4bc87e62 CS |
412 | |
413 | if (oldambient != NULL) { | |
6d3dc07c | 414 | rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai); |
4bc87e62 CS |
415 | if (rc != 0) |
416 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
417 | __func__, __LINE__, rc); | |
418 | } | |
419 | ||
6d3dc07c CS |
420 | rc = netlbl_cfg_unlbl_map_add(smack_net_ambient, PF_INET, |
421 | NULL, NULL, &nai); | |
4bc87e62 CS |
422 | if (rc != 0) |
423 | printk(KERN_WARNING "%s:%d add rc = %d\n", | |
424 | __func__, __LINE__, rc); | |
425 | } | |
426 | ||
e114e473 CS |
427 | /* |
428 | * Seq_file read operations for /smack/cipso | |
429 | */ | |
430 | ||
431 | static void *cipso_seq_start(struct seq_file *s, loff_t *pos) | |
432 | { | |
433 | if (*pos == SEQ_READ_FINISHED) | |
434 | return NULL; | |
435 | ||
436 | return smack_known; | |
437 | } | |
438 | ||
439 | static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
440 | { | |
441 | struct smack_known *skp = ((struct smack_known *) v)->smk_next; | |
442 | ||
443 | /* | |
444 | * Omit labels with no associated cipso value | |
445 | */ | |
446 | while (skp != NULL && !skp->smk_cipso) | |
447 | skp = skp->smk_next; | |
448 | ||
449 | if (skp == NULL) | |
450 | *pos = SEQ_READ_FINISHED; | |
451 | ||
452 | return skp; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Print cipso labels in format: | |
457 | * label level[/cat[,cat]] | |
458 | */ | |
459 | static int cipso_seq_show(struct seq_file *s, void *v) | |
460 | { | |
461 | struct smack_known *skp = (struct smack_known *) v; | |
462 | struct smack_cipso *scp = skp->smk_cipso; | |
463 | char *cbp; | |
464 | char sep = '/'; | |
465 | int cat = 1; | |
466 | int i; | |
467 | unsigned char m; | |
468 | ||
469 | if (scp == NULL) | |
470 | return 0; | |
471 | ||
472 | seq_printf(s, "%s %3d", (char *)&skp->smk_known, scp->smk_level); | |
473 | ||
474 | cbp = scp->smk_catset; | |
475 | for (i = 0; i < SMK_LABELLEN; i++) | |
476 | for (m = 0x80; m != 0; m >>= 1) { | |
477 | if (m & cbp[i]) { | |
478 | seq_printf(s, "%c%d", sep, cat); | |
479 | sep = ','; | |
480 | } | |
481 | cat++; | |
482 | } | |
483 | ||
484 | seq_putc(s, '\n'); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static void cipso_seq_stop(struct seq_file *s, void *v) | |
490 | { | |
491 | /* No-op */ | |
492 | } | |
493 | ||
494 | static struct seq_operations cipso_seq_ops = { | |
495 | .start = cipso_seq_start, | |
496 | .stop = cipso_seq_stop, | |
497 | .next = cipso_seq_next, | |
498 | .show = cipso_seq_show, | |
499 | }; | |
500 | ||
501 | /** | |
502 | * smk_open_cipso - open() for /smack/cipso | |
503 | * @inode: inode structure representing file | |
504 | * @file: "cipso" file pointer | |
505 | * | |
506 | * Connect our cipso_seq_* operations with /smack/cipso | |
507 | * file_operations | |
508 | */ | |
509 | static int smk_open_cipso(struct inode *inode, struct file *file) | |
510 | { | |
511 | return seq_open(file, &cipso_seq_ops); | |
512 | } | |
513 | ||
514 | /** | |
515 | * smk_write_cipso - write() for /smack/cipso | |
516 | * @filp: file pointer, not actually used | |
517 | * @buf: where to get the data from | |
518 | * @count: bytes sent | |
519 | * @ppos: where to start | |
520 | * | |
521 | * Accepts only one cipso rule per write call. | |
522 | * Returns number of bytes written or error code, as appropriate | |
523 | */ | |
524 | static ssize_t smk_write_cipso(struct file *file, const char __user *buf, | |
525 | size_t count, loff_t *ppos) | |
526 | { | |
527 | struct smack_known *skp; | |
528 | struct smack_cipso *scp = NULL; | |
529 | char mapcatset[SMK_LABELLEN]; | |
530 | int maplevel; | |
531 | int cat; | |
532 | int catlen; | |
533 | ssize_t rc = -EINVAL; | |
534 | char *data = NULL; | |
535 | char *rule; | |
536 | int ret; | |
537 | int i; | |
538 | ||
539 | /* | |
540 | * Must have privilege. | |
541 | * No partial writes. | |
542 | * Enough data must be present. | |
543 | */ | |
544 | if (!capable(CAP_MAC_ADMIN)) | |
545 | return -EPERM; | |
546 | if (*ppos != 0) | |
547 | return -EINVAL; | |
b500ce8d | 548 | if (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX) |
e114e473 CS |
549 | return -EINVAL; |
550 | ||
551 | data = kzalloc(count + 1, GFP_KERNEL); | |
552 | if (data == NULL) | |
553 | return -ENOMEM; | |
554 | ||
555 | if (copy_from_user(data, buf, count) != 0) { | |
556 | rc = -EFAULT; | |
557 | goto unlockedout; | |
558 | } | |
559 | ||
560 | data[count] = '\0'; | |
561 | rule = data; | |
562 | /* | |
563 | * Only allow one writer at a time. Writes should be | |
564 | * quite rare and small in any case. | |
565 | */ | |
566 | mutex_lock(&smack_cipso_lock); | |
567 | ||
568 | skp = smk_import_entry(rule, 0); | |
569 | if (skp == NULL) | |
570 | goto out; | |
571 | ||
c19a28e1 | 572 | rule += SMK_LABELLEN; |
e114e473 CS |
573 | ret = sscanf(rule, "%d", &maplevel); |
574 | if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) | |
575 | goto out; | |
576 | ||
577 | rule += SMK_DIGITLEN; | |
578 | ret = sscanf(rule, "%d", &catlen); | |
579 | if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM) | |
580 | goto out; | |
581 | ||
b500ce8d | 582 | if (count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN)) |
e114e473 CS |
583 | goto out; |
584 | ||
585 | memset(mapcatset, 0, sizeof(mapcatset)); | |
586 | ||
587 | for (i = 0; i < catlen; i++) { | |
588 | rule += SMK_DIGITLEN; | |
589 | ret = sscanf(rule, "%d", &cat); | |
590 | if (ret != 1 || cat > SMACK_CIPSO_MAXCATVAL) | |
591 | goto out; | |
592 | ||
593 | smack_catset_bit(cat, mapcatset); | |
594 | } | |
595 | ||
596 | if (skp->smk_cipso == NULL) { | |
597 | scp = kzalloc(sizeof(struct smack_cipso), GFP_KERNEL); | |
598 | if (scp == NULL) { | |
599 | rc = -ENOMEM; | |
600 | goto out; | |
601 | } | |
602 | } | |
603 | ||
604 | spin_lock_bh(&skp->smk_cipsolock); | |
605 | ||
606 | if (scp == NULL) | |
607 | scp = skp->smk_cipso; | |
608 | else | |
609 | skp->smk_cipso = scp; | |
610 | ||
611 | scp->smk_level = maplevel; | |
612 | memcpy(scp->smk_catset, mapcatset, sizeof(mapcatset)); | |
613 | ||
614 | spin_unlock_bh(&skp->smk_cipsolock); | |
615 | ||
616 | rc = count; | |
617 | out: | |
618 | mutex_unlock(&smack_cipso_lock); | |
619 | unlockedout: | |
620 | kfree(data); | |
621 | return rc; | |
622 | } | |
623 | ||
624 | static const struct file_operations smk_cipso_ops = { | |
625 | .open = smk_open_cipso, | |
626 | .read = seq_read, | |
627 | .llseek = seq_lseek, | |
628 | .write = smk_write_cipso, | |
629 | .release = seq_release, | |
630 | }; | |
631 | ||
6d3dc07c CS |
632 | /* |
633 | * Seq_file read operations for /smack/netlabel | |
634 | */ | |
635 | ||
636 | static void *netlbladdr_seq_start(struct seq_file *s, loff_t *pos) | |
637 | { | |
638 | if (*pos == SEQ_READ_FINISHED) | |
639 | return NULL; | |
640 | ||
641 | return smack_netlbladdrs; | |
642 | } | |
643 | ||
644 | static void *netlbladdr_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
645 | { | |
646 | struct smk_netlbladdr *skp = ((struct smk_netlbladdr *) v)->smk_next; | |
647 | ||
648 | if (skp == NULL) | |
649 | *pos = SEQ_READ_FINISHED; | |
650 | ||
651 | return skp; | |
652 | } | |
653 | /* | |
654 | #define BEMASK 0x80000000 | |
655 | */ | |
656 | #define BEMASK 0x00000001 | |
657 | #define BEBITS (sizeof(__be32) * 8) | |
658 | ||
659 | /* | |
660 | * Print host/label pairs | |
661 | */ | |
662 | static int netlbladdr_seq_show(struct seq_file *s, void *v) | |
663 | { | |
664 | struct smk_netlbladdr *skp = (struct smk_netlbladdr *) v; | |
665 | unsigned char *hp = (char *) &skp->smk_host.sin_addr.s_addr; | |
666 | __be32 bebits; | |
667 | int maskn = 0; | |
668 | ||
669 | for (bebits = BEMASK; bebits != 0; maskn++, bebits <<= 1) | |
670 | if ((skp->smk_mask.s_addr & bebits) == 0) | |
671 | break; | |
672 | ||
673 | seq_printf(s, "%u.%u.%u.%u/%d %s\n", | |
674 | hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label); | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | static void netlbladdr_seq_stop(struct seq_file *s, void *v) | |
680 | { | |
681 | /* No-op */ | |
682 | } | |
683 | ||
684 | static struct seq_operations netlbladdr_seq_ops = { | |
685 | .start = netlbladdr_seq_start, | |
686 | .stop = netlbladdr_seq_stop, | |
687 | .next = netlbladdr_seq_next, | |
688 | .show = netlbladdr_seq_show, | |
689 | }; | |
690 | ||
691 | /** | |
692 | * smk_open_netlbladdr - open() for /smack/netlabel | |
693 | * @inode: inode structure representing file | |
694 | * @file: "netlabel" file pointer | |
695 | * | |
696 | * Connect our netlbladdr_seq_* operations with /smack/netlabel | |
697 | * file_operations | |
698 | */ | |
699 | static int smk_open_netlbladdr(struct inode *inode, struct file *file) | |
700 | { | |
701 | return seq_open(file, &netlbladdr_seq_ops); | |
702 | } | |
703 | ||
704 | /** | |
705 | * smk_write_netlbladdr - write() for /smack/netlabel | |
706 | * @filp: file pointer, not actually used | |
707 | * @buf: where to get the data from | |
708 | * @count: bytes sent | |
709 | * @ppos: where to start | |
710 | * | |
711 | * Accepts only one netlbladdr per write call. | |
712 | * Returns number of bytes written or error code, as appropriate | |
713 | */ | |
714 | static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, | |
715 | size_t count, loff_t *ppos) | |
716 | { | |
717 | struct smk_netlbladdr *skp; | |
718 | struct sockaddr_in newname; | |
719 | char smack[SMK_LABELLEN]; | |
720 | char *sp; | |
721 | char data[SMK_NETLBLADDRMAX]; | |
722 | char *host = (char *)&newname.sin_addr.s_addr; | |
723 | int rc; | |
724 | struct netlbl_audit audit_info; | |
725 | struct in_addr mask; | |
726 | unsigned int m; | |
727 | __be32 bebits = BEMASK; | |
728 | __be32 nsa; | |
729 | ||
730 | /* | |
731 | * Must have privilege. | |
732 | * No partial writes. | |
733 | * Enough data must be present. | |
734 | * "<addr/mask, as a.b.c.d/e><space><label>" | |
735 | * "<addr, as a.b.c.d><space><label>" | |
736 | */ | |
737 | if (!capable(CAP_MAC_ADMIN)) | |
738 | return -EPERM; | |
739 | if (*ppos != 0) | |
740 | return -EINVAL; | |
741 | if (count < SMK_NETLBLADDRMIN || count > SMK_NETLBLADDRMAX) | |
742 | return -EINVAL; | |
743 | if (copy_from_user(data, buf, count) != 0) | |
744 | return -EFAULT; | |
745 | ||
746 | data[count] = '\0'; | |
747 | ||
748 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%d %s", | |
749 | &host[0], &host[1], &host[2], &host[3], &m, smack); | |
750 | if (rc != 6) { | |
751 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s", | |
752 | &host[0], &host[1], &host[2], &host[3], smack); | |
753 | if (rc != 5) | |
754 | return -EINVAL; | |
755 | m = BEBITS; | |
756 | } | |
757 | if (m > BEBITS) | |
758 | return -EINVAL; | |
759 | ||
760 | sp = smk_import(smack, 0); | |
761 | if (sp == NULL) | |
762 | return -EINVAL; | |
763 | ||
764 | for (mask.s_addr = 0; m > 0; m--) { | |
765 | mask.s_addr |= bebits; | |
766 | bebits <<= 1; | |
767 | } | |
768 | /* | |
769 | * Only allow one writer at a time. Writes should be | |
770 | * quite rare and small in any case. | |
771 | */ | |
772 | mutex_lock(&smk_netlbladdr_lock); | |
773 | ||
774 | nsa = newname.sin_addr.s_addr; | |
775 | for (skp = smack_netlbladdrs; skp != NULL; skp = skp->smk_next) | |
776 | if (skp->smk_host.sin_addr.s_addr == nsa && | |
777 | skp->smk_mask.s_addr == mask.s_addr) | |
778 | break; | |
779 | ||
780 | smk_netlabel_audit_set(&audit_info); | |
781 | ||
782 | if (skp == NULL) { | |
783 | skp = kzalloc(sizeof(*skp), GFP_KERNEL); | |
784 | if (skp == NULL) | |
785 | rc = -ENOMEM; | |
786 | else { | |
787 | rc = 0; | |
788 | skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; | |
789 | skp->smk_mask.s_addr = mask.s_addr; | |
790 | skp->smk_next = smack_netlbladdrs; | |
791 | skp->smk_label = sp; | |
792 | smack_netlbladdrs = skp; | |
793 | } | |
794 | } else { | |
795 | rc = netlbl_cfg_unlbl_static_del(&init_net, NULL, | |
796 | &skp->smk_host.sin_addr, &skp->smk_mask, | |
797 | PF_INET, &audit_info); | |
798 | skp->smk_label = sp; | |
799 | } | |
800 | ||
801 | /* | |
802 | * Now tell netlabel about the single label nature of | |
803 | * this host so that incoming packets get labeled. | |
804 | */ | |
805 | ||
806 | if (rc == 0) | |
807 | rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, | |
808 | &skp->smk_host.sin_addr, &skp->smk_mask, PF_INET, | |
809 | smack_to_secid(skp->smk_label), &audit_info); | |
810 | ||
811 | if (rc == 0) | |
812 | rc = count; | |
813 | ||
814 | mutex_unlock(&smk_netlbladdr_lock); | |
815 | ||
816 | return rc; | |
817 | } | |
818 | ||
819 | static const struct file_operations smk_netlbladdr_ops = { | |
820 | .open = smk_open_netlbladdr, | |
821 | .read = seq_read, | |
822 | .llseek = seq_lseek, | |
823 | .write = smk_write_netlbladdr, | |
824 | .release = seq_release, | |
825 | }; | |
826 | ||
e114e473 CS |
827 | /** |
828 | * smk_read_doi - read() for /smack/doi | |
829 | * @filp: file pointer, not actually used | |
830 | * @buf: where to put the result | |
831 | * @count: maximum to send along | |
832 | * @ppos: where to start | |
833 | * | |
834 | * Returns number of bytes read or error code, as appropriate | |
835 | */ | |
836 | static ssize_t smk_read_doi(struct file *filp, char __user *buf, | |
837 | size_t count, loff_t *ppos) | |
838 | { | |
839 | char temp[80]; | |
840 | ssize_t rc; | |
841 | ||
842 | if (*ppos != 0) | |
843 | return 0; | |
844 | ||
845 | sprintf(temp, "%d", smk_cipso_doi_value); | |
846 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
847 | ||
848 | return rc; | |
849 | } | |
850 | ||
851 | /** | |
852 | * smk_write_doi - write() for /smack/doi | |
853 | * @filp: file pointer, not actually used | |
854 | * @buf: where to get the data from | |
855 | * @count: bytes sent | |
856 | * @ppos: where to start | |
857 | * | |
858 | * Returns number of bytes written or error code, as appropriate | |
859 | */ | |
860 | static ssize_t smk_write_doi(struct file *file, const char __user *buf, | |
861 | size_t count, loff_t *ppos) | |
862 | { | |
863 | char temp[80]; | |
864 | int i; | |
865 | ||
866 | if (!capable(CAP_MAC_ADMIN)) | |
867 | return -EPERM; | |
868 | ||
869 | if (count >= sizeof(temp) || count == 0) | |
870 | return -EINVAL; | |
871 | ||
872 | if (copy_from_user(temp, buf, count) != 0) | |
873 | return -EFAULT; | |
874 | ||
875 | temp[count] = '\0'; | |
876 | ||
877 | if (sscanf(temp, "%d", &i) != 1) | |
878 | return -EINVAL; | |
879 | ||
880 | smk_cipso_doi_value = i; | |
881 | ||
882 | smk_cipso_doi(); | |
883 | ||
884 | return count; | |
885 | } | |
886 | ||
887 | static const struct file_operations smk_doi_ops = { | |
888 | .read = smk_read_doi, | |
889 | .write = smk_write_doi, | |
890 | }; | |
891 | ||
892 | /** | |
893 | * smk_read_direct - read() for /smack/direct | |
894 | * @filp: file pointer, not actually used | |
895 | * @buf: where to put the result | |
896 | * @count: maximum to send along | |
897 | * @ppos: where to start | |
898 | * | |
899 | * Returns number of bytes read or error code, as appropriate | |
900 | */ | |
901 | static ssize_t smk_read_direct(struct file *filp, char __user *buf, | |
902 | size_t count, loff_t *ppos) | |
903 | { | |
904 | char temp[80]; | |
905 | ssize_t rc; | |
906 | ||
907 | if (*ppos != 0) | |
908 | return 0; | |
909 | ||
910 | sprintf(temp, "%d", smack_cipso_direct); | |
911 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
912 | ||
913 | return rc; | |
914 | } | |
915 | ||
916 | /** | |
917 | * smk_write_direct - write() for /smack/direct | |
918 | * @filp: file pointer, not actually used | |
919 | * @buf: where to get the data from | |
920 | * @count: bytes sent | |
921 | * @ppos: where to start | |
922 | * | |
923 | * Returns number of bytes written or error code, as appropriate | |
924 | */ | |
925 | static ssize_t smk_write_direct(struct file *file, const char __user *buf, | |
926 | size_t count, loff_t *ppos) | |
927 | { | |
928 | char temp[80]; | |
929 | int i; | |
930 | ||
931 | if (!capable(CAP_MAC_ADMIN)) | |
932 | return -EPERM; | |
933 | ||
934 | if (count >= sizeof(temp) || count == 0) | |
935 | return -EINVAL; | |
936 | ||
937 | if (copy_from_user(temp, buf, count) != 0) | |
938 | return -EFAULT; | |
939 | ||
940 | temp[count] = '\0'; | |
941 | ||
942 | if (sscanf(temp, "%d", &i) != 1) | |
943 | return -EINVAL; | |
944 | ||
945 | smack_cipso_direct = i; | |
946 | ||
947 | return count; | |
948 | } | |
949 | ||
950 | static const struct file_operations smk_direct_ops = { | |
951 | .read = smk_read_direct, | |
952 | .write = smk_write_direct, | |
953 | }; | |
954 | ||
955 | /** | |
956 | * smk_read_ambient - read() for /smack/ambient | |
957 | * @filp: file pointer, not actually used | |
958 | * @buf: where to put the result | |
959 | * @cn: maximum to send along | |
960 | * @ppos: where to start | |
961 | * | |
962 | * Returns number of bytes read or error code, as appropriate | |
963 | */ | |
964 | static ssize_t smk_read_ambient(struct file *filp, char __user *buf, | |
965 | size_t cn, loff_t *ppos) | |
966 | { | |
967 | ssize_t rc; | |
e114e473 CS |
968 | int asize; |
969 | ||
970 | if (*ppos != 0) | |
971 | return 0; | |
972 | /* | |
973 | * Being careful to avoid a problem in the case where | |
974 | * smack_net_ambient gets changed in midstream. | |
e114e473 | 975 | */ |
4bc87e62 | 976 | mutex_lock(&smack_ambient_lock); |
e114e473 | 977 | |
4bc87e62 CS |
978 | asize = strlen(smack_net_ambient) + 1; |
979 | ||
980 | if (cn >= asize) | |
981 | rc = simple_read_from_buffer(buf, cn, ppos, | |
982 | smack_net_ambient, asize); | |
983 | else | |
984 | rc = -EINVAL; | |
e114e473 | 985 | |
4bc87e62 | 986 | mutex_unlock(&smack_ambient_lock); |
e114e473 CS |
987 | |
988 | return rc; | |
989 | } | |
990 | ||
991 | /** | |
992 | * smk_write_ambient - write() for /smack/ambient | |
993 | * @filp: file pointer, not actually used | |
994 | * @buf: where to get the data from | |
995 | * @count: bytes sent | |
996 | * @ppos: where to start | |
997 | * | |
998 | * Returns number of bytes written or error code, as appropriate | |
999 | */ | |
1000 | static ssize_t smk_write_ambient(struct file *file, const char __user *buf, | |
1001 | size_t count, loff_t *ppos) | |
1002 | { | |
1003 | char in[SMK_LABELLEN]; | |
4bc87e62 | 1004 | char *oldambient; |
e114e473 CS |
1005 | char *smack; |
1006 | ||
1007 | if (!capable(CAP_MAC_ADMIN)) | |
1008 | return -EPERM; | |
1009 | ||
1010 | if (count >= SMK_LABELLEN) | |
1011 | return -EINVAL; | |
1012 | ||
1013 | if (copy_from_user(in, buf, count) != 0) | |
1014 | return -EFAULT; | |
1015 | ||
1016 | smack = smk_import(in, count); | |
1017 | if (smack == NULL) | |
1018 | return -EINVAL; | |
1019 | ||
4bc87e62 CS |
1020 | mutex_lock(&smack_ambient_lock); |
1021 | ||
1022 | oldambient = smack_net_ambient; | |
e114e473 | 1023 | smack_net_ambient = smack; |
4bc87e62 CS |
1024 | smk_unlbl_ambient(oldambient); |
1025 | ||
1026 | mutex_unlock(&smack_ambient_lock); | |
e114e473 CS |
1027 | |
1028 | return count; | |
1029 | } | |
1030 | ||
1031 | static const struct file_operations smk_ambient_ops = { | |
1032 | .read = smk_read_ambient, | |
1033 | .write = smk_write_ambient, | |
1034 | }; | |
1035 | ||
15446235 CS |
1036 | /** |
1037 | * smk_read_onlycap - read() for /smack/onlycap | |
1038 | * @filp: file pointer, not actually used | |
1039 | * @buf: where to put the result | |
1040 | * @cn: maximum to send along | |
1041 | * @ppos: where to start | |
1042 | * | |
1043 | * Returns number of bytes read or error code, as appropriate | |
1044 | */ | |
1045 | static ssize_t smk_read_onlycap(struct file *filp, char __user *buf, | |
1046 | size_t cn, loff_t *ppos) | |
1047 | { | |
1048 | char *smack = ""; | |
1049 | ssize_t rc = -EINVAL; | |
1050 | int asize; | |
1051 | ||
1052 | if (*ppos != 0) | |
1053 | return 0; | |
1054 | ||
1055 | if (smack_onlycap != NULL) | |
1056 | smack = smack_onlycap; | |
1057 | ||
1058 | asize = strlen(smack) + 1; | |
1059 | ||
1060 | if (cn >= asize) | |
1061 | rc = simple_read_from_buffer(buf, cn, ppos, smack, asize); | |
1062 | ||
1063 | return rc; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * smk_write_onlycap - write() for /smack/onlycap | |
1068 | * @filp: file pointer, not actually used | |
1069 | * @buf: where to get the data from | |
1070 | * @count: bytes sent | |
1071 | * @ppos: where to start | |
1072 | * | |
1073 | * Returns number of bytes written or error code, as appropriate | |
1074 | */ | |
1075 | static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, | |
1076 | size_t count, loff_t *ppos) | |
1077 | { | |
1078 | char in[SMK_LABELLEN]; | |
b6dff3ec | 1079 | char *sp = current->cred->security; |
15446235 CS |
1080 | |
1081 | if (!capable(CAP_MAC_ADMIN)) | |
1082 | return -EPERM; | |
1083 | ||
1084 | /* | |
1085 | * This can be done using smk_access() but is done | |
1086 | * explicitly for clarity. The smk_access() implementation | |
1087 | * would use smk_access(smack_onlycap, MAY_WRITE) | |
1088 | */ | |
1089 | if (smack_onlycap != NULL && smack_onlycap != sp) | |
1090 | return -EPERM; | |
1091 | ||
1092 | if (count >= SMK_LABELLEN) | |
1093 | return -EINVAL; | |
1094 | ||
1095 | if (copy_from_user(in, buf, count) != 0) | |
1096 | return -EFAULT; | |
1097 | ||
1098 | /* | |
1099 | * Should the null string be passed in unset the onlycap value. | |
1100 | * This seems like something to be careful with as usually | |
1101 | * smk_import only expects to return NULL for errors. It | |
1102 | * is usually the case that a nullstring or "\n" would be | |
1103 | * bad to pass to smk_import but in fact this is useful here. | |
1104 | */ | |
1105 | smack_onlycap = smk_import(in, count); | |
1106 | ||
1107 | return count; | |
1108 | } | |
1109 | ||
1110 | static const struct file_operations smk_onlycap_ops = { | |
1111 | .read = smk_read_onlycap, | |
1112 | .write = smk_write_onlycap, | |
1113 | }; | |
1114 | ||
e114e473 CS |
1115 | /** |
1116 | * smk_fill_super - fill the /smackfs superblock | |
1117 | * @sb: the empty superblock | |
1118 | * @data: unused | |
1119 | * @silent: unused | |
1120 | * | |
1121 | * Fill in the well known entries for /smack | |
1122 | * | |
1123 | * Returns 0 on success, an error code on failure | |
1124 | */ | |
1125 | static int smk_fill_super(struct super_block *sb, void *data, int silent) | |
1126 | { | |
1127 | int rc; | |
1128 | struct inode *root_inode; | |
1129 | ||
1130 | static struct tree_descr smack_files[] = { | |
1131 | [SMK_LOAD] = | |
1132 | {"load", &smk_load_ops, S_IRUGO|S_IWUSR}, | |
1133 | [SMK_CIPSO] = | |
1134 | {"cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR}, | |
1135 | [SMK_DOI] = | |
1136 | {"doi", &smk_doi_ops, S_IRUGO|S_IWUSR}, | |
1137 | [SMK_DIRECT] = | |
1138 | {"direct", &smk_direct_ops, S_IRUGO|S_IWUSR}, | |
1139 | [SMK_AMBIENT] = | |
1140 | {"ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR}, | |
6d3dc07c CS |
1141 | [SMK_NETLBLADDR] = |
1142 | {"netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR}, | |
15446235 CS |
1143 | [SMK_ONLYCAP] = |
1144 | {"onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR}, | |
e114e473 CS |
1145 | /* last one */ {""} |
1146 | }; | |
1147 | ||
1148 | rc = simple_fill_super(sb, SMACK_MAGIC, smack_files); | |
1149 | if (rc != 0) { | |
1150 | printk(KERN_ERR "%s failed %d while creating inodes\n", | |
1151 | __func__, rc); | |
1152 | return rc; | |
1153 | } | |
1154 | ||
1155 | root_inode = sb->s_root->d_inode; | |
1156 | root_inode->i_security = new_inode_smack(smack_known_floor.smk_known); | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | /** | |
1162 | * smk_get_sb - get the smackfs superblock | |
1163 | * @fs_type: passed along without comment | |
1164 | * @flags: passed along without comment | |
1165 | * @dev_name: passed along without comment | |
1166 | * @data: passed along without comment | |
1167 | * @mnt: passed along without comment | |
1168 | * | |
1169 | * Just passes everything along. | |
1170 | * | |
1171 | * Returns what the lower level code does. | |
1172 | */ | |
1173 | static int smk_get_sb(struct file_system_type *fs_type, | |
1174 | int flags, const char *dev_name, void *data, | |
1175 | struct vfsmount *mnt) | |
1176 | { | |
1177 | return get_sb_single(fs_type, flags, data, smk_fill_super, mnt); | |
1178 | } | |
1179 | ||
1180 | static struct file_system_type smk_fs_type = { | |
1181 | .name = "smackfs", | |
1182 | .get_sb = smk_get_sb, | |
1183 | .kill_sb = kill_litter_super, | |
1184 | }; | |
1185 | ||
1186 | static struct vfsmount *smackfs_mount; | |
1187 | ||
1188 | /** | |
1189 | * init_smk_fs - get the smackfs superblock | |
1190 | * | |
1191 | * register the smackfs | |
1192 | * | |
076c54c5 AD |
1193 | * Do not register smackfs if Smack wasn't enabled |
1194 | * on boot. We can not put this method normally under the | |
1195 | * smack_init() code path since the security subsystem get | |
1196 | * initialized before the vfs caches. | |
1197 | * | |
1198 | * Returns true if we were not chosen on boot or if | |
1199 | * we were chosen and filesystem registration succeeded. | |
e114e473 CS |
1200 | */ |
1201 | static int __init init_smk_fs(void) | |
1202 | { | |
1203 | int err; | |
1204 | ||
076c54c5 AD |
1205 | if (!security_module_enable(&smack_ops)) |
1206 | return 0; | |
1207 | ||
e114e473 CS |
1208 | err = register_filesystem(&smk_fs_type); |
1209 | if (!err) { | |
1210 | smackfs_mount = kern_mount(&smk_fs_type); | |
1211 | if (IS_ERR(smackfs_mount)) { | |
1212 | printk(KERN_ERR "smackfs: could not mount!\n"); | |
1213 | err = PTR_ERR(smackfs_mount); | |
1214 | smackfs_mount = NULL; | |
1215 | } | |
1216 | } | |
1217 | ||
e114e473 | 1218 | smk_cipso_doi(); |
4bc87e62 | 1219 | smk_unlbl_ambient(NULL); |
e114e473 CS |
1220 | |
1221 | return err; | |
1222 | } | |
1223 | ||
1224 | __initcall(init_smk_fs); |