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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> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
6d3dc07c | 24 | #include <net/net_namespace.h> |
e114e473 CS |
25 | #include <net/cipso_ipv4.h> |
26 | #include <linux/seq_file.h> | |
27 | #include <linux/ctype.h> | |
4bc87e62 | 28 | #include <linux/audit.h> |
958d2c2f | 29 | #include <linux/magic.h> |
e114e473 CS |
30 | #include "smack.h" |
31 | ||
32 | /* | |
33 | * smackfs pseudo filesystem. | |
34 | */ | |
35 | ||
36 | enum smk_inos { | |
37 | SMK_ROOT_INO = 2, | |
38 | SMK_LOAD = 3, /* load policy */ | |
39 | SMK_CIPSO = 4, /* load label -> CIPSO mapping */ | |
40 | SMK_DOI = 5, /* CIPSO DOI */ | |
41 | SMK_DIRECT = 6, /* CIPSO level indicating direct label */ | |
42 | SMK_AMBIENT = 7, /* internet ambient label */ | |
6d3dc07c | 43 | SMK_NETLBLADDR = 8, /* single label hosts */ |
15446235 | 44 | SMK_ONLYCAP = 9, /* the only "capable" label */ |
ecfcc53f | 45 | SMK_LOGGING = 10, /* logging */ |
7898e1f8 | 46 | SMK_LOAD_SELF = 11, /* task specific rules */ |
828716c2 | 47 | SMK_ACCESSES = 12, /* access policy */ |
f7112e6c CS |
48 | SMK_MAPPED = 13, /* CIPSO level indicating mapped label */ |
49 | SMK_LOAD2 = 14, /* load policy with long labels */ | |
50 | SMK_LOAD_SELF2 = 15, /* load task specific rules with long labels */ | |
51 | SMK_ACCESS2 = 16, /* make an access check with long labels */ | |
52 | SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */ | |
449543b0 | 53 | SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */ |
e05b6f98 | 54 | SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */ |
e114e473 CS |
55 | }; |
56 | ||
57 | /* | |
58 | * List locks | |
59 | */ | |
e114e473 | 60 | static DEFINE_MUTEX(smack_cipso_lock); |
4bc87e62 | 61 | static DEFINE_MUTEX(smack_ambient_lock); |
6d3dc07c | 62 | static DEFINE_MUTEX(smk_netlbladdr_lock); |
e114e473 CS |
63 | |
64 | /* | |
65 | * This is the "ambient" label for network traffic. | |
66 | * If it isn't somehow marked, use this. | |
67 | * It can be reset via smackfs/ambient | |
68 | */ | |
2f823ff8 | 69 | struct smack_known *smack_net_ambient; |
e114e473 | 70 | |
e114e473 CS |
71 | /* |
72 | * This is the level in a CIPSO header that indicates a | |
73 | * smack label is contained directly in the category set. | |
74 | * It can be reset via smackfs/direct | |
75 | */ | |
76 | int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT; | |
77 | ||
f7112e6c CS |
78 | /* |
79 | * This is the level in a CIPSO header that indicates a | |
80 | * secid is contained directly in the category set. | |
81 | * It can be reset via smackfs/mapped | |
82 | */ | |
83 | int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT; | |
84 | ||
15446235 CS |
85 | /* |
86 | * Unless a process is running with this label even | |
87 | * having CAP_MAC_OVERRIDE isn't enough to grant | |
88 | * privilege to violate MAC policy. If no label is | |
89 | * designated (the NULL case) capabilities apply to | |
90 | * everyone. It is expected that the hat (^) label | |
91 | * will be used if any label is used. | |
92 | */ | |
93 | char *smack_onlycap; | |
94 | ||
6d3dc07c CS |
95 | /* |
96 | * Certain IP addresses may be designated as single label hosts. | |
97 | * Packets are sent there unlabeled, but only from tasks that | |
98 | * can write to the specified label. | |
99 | */ | |
7198e2ee EB |
100 | |
101 | LIST_HEAD(smk_netlbladdr_list); | |
272cd7a8 CS |
102 | |
103 | /* | |
104 | * Rule lists are maintained for each label. | |
f7112e6c | 105 | * This master list is just for reading /smack/load and /smack/load2. |
272cd7a8 CS |
106 | */ |
107 | struct smack_master_list { | |
108 | struct list_head list; | |
109 | struct smack_rule *smk_rule; | |
110 | }; | |
111 | ||
7198e2ee | 112 | LIST_HEAD(smack_rule_list); |
6d3dc07c | 113 | |
e05b6f98 | 114 | struct smack_parsed_rule { |
2f823ff8 | 115 | struct smack_known *smk_subject; |
e05b6f98 RK |
116 | char *smk_object; |
117 | int smk_access1; | |
118 | int smk_access2; | |
119 | }; | |
120 | ||
e114e473 | 121 | static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT; |
e114e473 | 122 | |
4303154e EB |
123 | const char *smack_cipso_option = SMACK_CIPSO_OPTION; |
124 | ||
e114e473 CS |
125 | /* |
126 | * Values for parsing cipso rules | |
127 | * SMK_DIGITLEN: Length of a digit field in a rule. | |
b500ce8d AD |
128 | * SMK_CIPSOMIN: Minimum possible cipso rule length. |
129 | * SMK_CIPSOMAX: Maximum possible cipso rule length. | |
e114e473 CS |
130 | */ |
131 | #define SMK_DIGITLEN 4 | |
b500ce8d AD |
132 | #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN) |
133 | #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN) | |
134 | ||
135 | /* | |
136 | * Values for parsing MAC rules | |
137 | * SMK_ACCESS: Maximum possible combination of access permissions | |
138 | * SMK_ACCESSLEN: Maximum length for a rule access field | |
139 | * SMK_LOADLEN: Smack rule length | |
140 | */ | |
5c6d1125 JS |
141 | #define SMK_OACCESS "rwxa" |
142 | #define SMK_ACCESS "rwxat" | |
143 | #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1) | |
144 | #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1) | |
145 | #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN) | |
146 | #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN) | |
b500ce8d | 147 | |
f7112e6c CS |
148 | /* |
149 | * Stricly for CIPSO level manipulation. | |
150 | * Set the category bit number in a smack label sized buffer. | |
151 | */ | |
152 | static inline void smack_catset_bit(unsigned int cat, char *catsetp) | |
153 | { | |
154 | if (cat == 0 || cat > (SMK_CIPSOLEN * 8)) | |
155 | return; | |
156 | ||
157 | catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8); | |
158 | } | |
159 | ||
6d3dc07c CS |
160 | /** |
161 | * smk_netlabel_audit_set - fill a netlbl_audit struct | |
162 | * @nap: structure to fill | |
163 | */ | |
164 | static void smk_netlabel_audit_set(struct netlbl_audit *nap) | |
165 | { | |
2f823ff8 CS |
166 | struct smack_known *skp = smk_of_current(); |
167 | ||
6d3dc07c CS |
168 | nap->loginuid = audit_get_loginuid(current); |
169 | nap->sessionid = audit_get_sessionid(current); | |
2f823ff8 | 170 | nap->secid = skp->smk_secid; |
6d3dc07c CS |
171 | } |
172 | ||
173 | /* | |
f7112e6c | 174 | * Value for parsing single label host rules |
6d3dc07c | 175 | * "1.2.3.4 X" |
6d3dc07c CS |
176 | */ |
177 | #define SMK_NETLBLADDRMIN 9 | |
e114e473 | 178 | |
e114e473 | 179 | /** |
e05b6f98 RK |
180 | * smk_set_access - add a rule to the rule list or replace an old rule |
181 | * @srp: the rule to add or replace | |
7898e1f8 CS |
182 | * @rule_list: the list of rules |
183 | * @rule_lock: the rule list lock | |
e05b6f98 | 184 | * @global: if non-zero, indicates a global rule |
e114e473 CS |
185 | * |
186 | * Looks through the current subject/object/access list for | |
187 | * the subject/object pair and replaces the access that was | |
188 | * there. If the pair isn't found add it with the specified | |
189 | * access. | |
81ea714b SL |
190 | * |
191 | * Returns 0 if nothing goes wrong or -ENOMEM if it fails | |
192 | * during the allocation of the new pair to add. | |
e114e473 | 193 | */ |
e05b6f98 RK |
194 | static int smk_set_access(struct smack_parsed_rule *srp, |
195 | struct list_head *rule_list, | |
196 | struct mutex *rule_lock, int global) | |
e114e473 | 197 | { |
7198e2ee | 198 | struct smack_rule *sp; |
e05b6f98 | 199 | struct smack_master_list *smlp; |
7898e1f8 | 200 | int found = 0; |
e05b6f98 | 201 | int rc = 0; |
e114e473 | 202 | |
7898e1f8 CS |
203 | mutex_lock(rule_lock); |
204 | ||
272cd7a8 CS |
205 | /* |
206 | * Because the object label is less likely to match | |
207 | * than the subject label check it first | |
208 | */ | |
7898e1f8 | 209 | list_for_each_entry_rcu(sp, rule_list, list) { |
272cd7a8 CS |
210 | if (sp->smk_object == srp->smk_object && |
211 | sp->smk_subject == srp->smk_subject) { | |
7198e2ee | 212 | found = 1; |
e05b6f98 RK |
213 | sp->smk_access |= srp->smk_access1; |
214 | sp->smk_access &= ~srp->smk_access2; | |
e114e473 CS |
215 | break; |
216 | } | |
e114e473 CS |
217 | } |
218 | ||
e05b6f98 RK |
219 | if (found == 0) { |
220 | sp = kzalloc(sizeof(*sp), GFP_KERNEL); | |
221 | if (sp == NULL) { | |
222 | rc = -ENOMEM; | |
223 | goto out; | |
224 | } | |
225 | ||
226 | sp->smk_subject = srp->smk_subject; | |
227 | sp->smk_object = srp->smk_object; | |
228 | sp->smk_access = srp->smk_access1 & ~srp->smk_access2; | |
229 | ||
230 | list_add_rcu(&sp->list, rule_list); | |
231 | /* | |
232 | * If this is a global as opposed to self and a new rule | |
233 | * it needs to get added for reporting. | |
234 | */ | |
235 | if (global) { | |
236 | smlp = kzalloc(sizeof(*smlp), GFP_KERNEL); | |
237 | if (smlp != NULL) { | |
238 | smlp->smk_rule = sp; | |
239 | list_add_rcu(&smlp->list, &smack_rule_list); | |
240 | } else | |
241 | rc = -ENOMEM; | |
242 | } | |
243 | } | |
244 | ||
245 | out: | |
7898e1f8 | 246 | mutex_unlock(rule_lock); |
e05b6f98 RK |
247 | return rc; |
248 | } | |
249 | ||
250 | /** | |
251 | * smk_perm_from_str - parse smack accesses from a text string | |
252 | * @string: a text string that contains a Smack accesses code | |
253 | * | |
254 | * Returns an integer with respective bits set for specified accesses. | |
255 | */ | |
256 | static int smk_perm_from_str(const char *string) | |
257 | { | |
258 | int perm = 0; | |
259 | const char *cp; | |
e114e473 | 260 | |
e05b6f98 RK |
261 | for (cp = string; ; cp++) |
262 | switch (*cp) { | |
263 | case '-': | |
264 | break; | |
265 | case 'r': | |
266 | case 'R': | |
267 | perm |= MAY_READ; | |
268 | break; | |
269 | case 'w': | |
270 | case 'W': | |
271 | perm |= MAY_WRITE; | |
272 | break; | |
273 | case 'x': | |
274 | case 'X': | |
275 | perm |= MAY_EXEC; | |
276 | break; | |
277 | case 'a': | |
278 | case 'A': | |
279 | perm |= MAY_APPEND; | |
280 | break; | |
281 | case 't': | |
282 | case 'T': | |
283 | perm |= MAY_TRANSMUTE; | |
284 | break; | |
285 | default: | |
286 | return perm; | |
287 | } | |
e114e473 CS |
288 | } |
289 | ||
290 | /** | |
f7112e6c CS |
291 | * smk_fill_rule - Fill Smack rule from strings |
292 | * @subject: subject label string | |
293 | * @object: object label string | |
e05b6f98 RK |
294 | * @access1: access string |
295 | * @access2: string with permissions to be removed | |
0e94ae17 JS |
296 | * @rule: Smack rule |
297 | * @import: if non-zero, import labels | |
3518721a | 298 | * @len: label length limit |
f7112e6c CS |
299 | * |
300 | * Returns 0 on success, -1 on failure | |
e114e473 | 301 | */ |
f7112e6c | 302 | static int smk_fill_rule(const char *subject, const char *object, |
e05b6f98 RK |
303 | const char *access1, const char *access2, |
304 | struct smack_parsed_rule *rule, int import, | |
305 | int len) | |
e114e473 | 306 | { |
f7112e6c | 307 | const char *cp; |
0e94ae17 | 308 | struct smack_known *skp; |
e114e473 | 309 | |
0e94ae17 | 310 | if (import) { |
2f823ff8 | 311 | rule->smk_subject = smk_import_entry(subject, len); |
0e94ae17 JS |
312 | if (rule->smk_subject == NULL) |
313 | return -1; | |
314 | ||
3518721a | 315 | rule->smk_object = smk_import(object, len); |
0e94ae17 JS |
316 | if (rule->smk_object == NULL) |
317 | return -1; | |
318 | } else { | |
3518721a | 319 | cp = smk_parse_smack(subject, len); |
f7112e6c CS |
320 | if (cp == NULL) |
321 | return -1; | |
322 | skp = smk_find_entry(cp); | |
323 | kfree(cp); | |
0e94ae17 JS |
324 | if (skp == NULL) |
325 | return -1; | |
2f823ff8 | 326 | rule->smk_subject = skp; |
0e94ae17 | 327 | |
3518721a | 328 | cp = smk_parse_smack(object, len); |
f7112e6c CS |
329 | if (cp == NULL) |
330 | return -1; | |
331 | skp = smk_find_entry(cp); | |
332 | kfree(cp); | |
0e94ae17 JS |
333 | if (skp == NULL) |
334 | return -1; | |
335 | rule->smk_object = skp->smk_known; | |
336 | } | |
7198e2ee | 337 | |
e05b6f98 RK |
338 | rule->smk_access1 = smk_perm_from_str(access1); |
339 | if (access2) | |
340 | rule->smk_access2 = smk_perm_from_str(access2); | |
341 | else | |
342 | rule->smk_access2 = ~rule->smk_access1; | |
e114e473 | 343 | |
3518721a | 344 | return 0; |
f7112e6c | 345 | } |
e114e473 | 346 | |
f7112e6c CS |
347 | /** |
348 | * smk_parse_rule - parse Smack rule from load string | |
349 | * @data: string to be parsed whose size is SMK_LOADLEN | |
350 | * @rule: Smack rule | |
351 | * @import: if non-zero, import labels | |
352 | * | |
353 | * Returns 0 on success, -1 on errors. | |
354 | */ | |
e05b6f98 RK |
355 | static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule, |
356 | int import) | |
f7112e6c CS |
357 | { |
358 | int rc; | |
e114e473 | 359 | |
f7112e6c | 360 | rc = smk_fill_rule(data, data + SMK_LABELLEN, |
e05b6f98 RK |
361 | data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule, |
362 | import, SMK_LABELLEN); | |
f7112e6c CS |
363 | return rc; |
364 | } | |
e114e473 | 365 | |
f7112e6c CS |
366 | /** |
367 | * smk_parse_long_rule - parse Smack rule from rule string | |
368 | * @data: string to be parsed, null terminated | |
e05b6f98 | 369 | * @rule: Will be filled with Smack parsed rule |
f7112e6c | 370 | * @import: if non-zero, import labels |
e05b6f98 | 371 | * @change: if non-zero, data is from /smack/change-rule |
f7112e6c CS |
372 | * |
373 | * Returns 0 on success, -1 on failure | |
374 | */ | |
e05b6f98 RK |
375 | static int smk_parse_long_rule(const char *data, struct smack_parsed_rule *rule, |
376 | int import, int change) | |
f7112e6c CS |
377 | { |
378 | char *subject; | |
379 | char *object; | |
e05b6f98 RK |
380 | char *access1; |
381 | char *access2; | |
f7112e6c CS |
382 | int datalen; |
383 | int rc = -1; | |
5c6d1125 | 384 | |
3b9fc372 | 385 | /* This is inefficient */ |
f7112e6c | 386 | datalen = strlen(data); |
3b9fc372 AC |
387 | |
388 | /* Our first element can be 64 + \0 with no spaces */ | |
389 | subject = kzalloc(datalen + 1, GFP_KERNEL); | |
f7112e6c CS |
390 | if (subject == NULL) |
391 | return -1; | |
392 | object = kzalloc(datalen, GFP_KERNEL); | |
393 | if (object == NULL) | |
394 | goto free_out_s; | |
e05b6f98 RK |
395 | access1 = kzalloc(datalen, GFP_KERNEL); |
396 | if (access1 == NULL) | |
f7112e6c | 397 | goto free_out_o; |
e05b6f98 RK |
398 | access2 = kzalloc(datalen, GFP_KERNEL); |
399 | if (access2 == NULL) | |
400 | goto free_out_a; | |
401 | ||
402 | if (change) { | |
403 | if (sscanf(data, "%s %s %s %s", | |
404 | subject, object, access1, access2) == 4) | |
405 | rc = smk_fill_rule(subject, object, access1, access2, | |
406 | rule, import, 0); | |
407 | } else { | |
408 | if (sscanf(data, "%s %s %s", subject, object, access1) == 3) | |
409 | rc = smk_fill_rule(subject, object, access1, NULL, | |
410 | rule, import, 0); | |
411 | } | |
f7112e6c | 412 | |
e05b6f98 RK |
413 | kfree(access2); |
414 | free_out_a: | |
415 | kfree(access1); | |
f7112e6c CS |
416 | free_out_o: |
417 | kfree(object); | |
418 | free_out_s: | |
419 | kfree(subject); | |
420 | return rc; | |
828716c2 JS |
421 | } |
422 | ||
f7112e6c CS |
423 | #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */ |
424 | #define SMK_LONG_FMT 1 /* Variable long label format */ | |
e05b6f98 | 425 | #define SMK_CHANGE_FMT 2 /* Rule modification format */ |
828716c2 | 426 | /** |
f7112e6c | 427 | * smk_write_rules_list - write() for any /smack rule file |
828716c2 JS |
428 | * @file: file pointer, not actually used |
429 | * @buf: where to get the data from | |
430 | * @count: bytes sent | |
431 | * @ppos: where to start - must be 0 | |
432 | * @rule_list: the list of rules to write to | |
433 | * @rule_lock: lock for the rule list | |
e05b6f98 | 434 | * @format: /smack/load or /smack/load2 or /smack/change-rule format. |
828716c2 JS |
435 | * |
436 | * Get one smack access rule from above. | |
f7112e6c CS |
437 | * The format for SMK_LONG_FMT is: |
438 | * "subject<whitespace>object<whitespace>access[<whitespace>...]" | |
439 | * The format for SMK_FIXED24_FMT is exactly: | |
440 | * "subject object rwxat" | |
e05b6f98 RK |
441 | * The format for SMK_CHANGE_FMT is: |
442 | * "subject<whitespace>object<whitespace> | |
443 | * acc_enable<whitespace>acc_disable[<whitespace>...]" | |
828716c2 | 444 | */ |
f7112e6c CS |
445 | static ssize_t smk_write_rules_list(struct file *file, const char __user *buf, |
446 | size_t count, loff_t *ppos, | |
447 | struct list_head *rule_list, | |
448 | struct mutex *rule_lock, int format) | |
828716c2 | 449 | { |
470043ba | 450 | struct smack_parsed_rule rule; |
828716c2 | 451 | char *data; |
f7112e6c | 452 | int datalen; |
828716c2 | 453 | int rc = -EINVAL; |
272cd7a8 | 454 | int load = 0; |
828716c2 JS |
455 | |
456 | /* | |
457 | * No partial writes. | |
458 | * Enough data must be present. | |
459 | */ | |
460 | if (*ppos != 0) | |
461 | return -EINVAL; | |
828716c2 | 462 | |
f7112e6c CS |
463 | if (format == SMK_FIXED24_FMT) { |
464 | /* | |
465 | * Minor hack for backward compatibility | |
466 | */ | |
467 | if (count != SMK_OLOADLEN && count != SMK_LOADLEN) | |
468 | return -EINVAL; | |
469 | datalen = SMK_LOADLEN; | |
470 | } else | |
471 | datalen = count + 1; | |
472 | ||
473 | data = kzalloc(datalen, GFP_KERNEL); | |
828716c2 JS |
474 | if (data == NULL) |
475 | return -ENOMEM; | |
476 | ||
477 | if (copy_from_user(data, buf, count) != 0) { | |
478 | rc = -EFAULT; | |
479 | goto out; | |
480 | } | |
481 | ||
f7112e6c CS |
482 | if (format == SMK_LONG_FMT) { |
483 | /* | |
484 | * Be sure the data string is terminated. | |
485 | */ | |
486 | data[count] = '\0'; | |
470043ba TS |
487 | if (smk_parse_long_rule(data, &rule, 1, 0)) |
488 | goto out; | |
e05b6f98 RK |
489 | } else if (format == SMK_CHANGE_FMT) { |
490 | data[count] = '\0'; | |
470043ba TS |
491 | if (smk_parse_long_rule(data, &rule, 1, 1)) |
492 | goto out; | |
f7112e6c CS |
493 | } else { |
494 | /* | |
495 | * More on the minor hack for backward compatibility | |
496 | */ | |
497 | if (count == (SMK_OLOADLEN)) | |
498 | data[SMK_OLOADLEN] = '-'; | |
470043ba TS |
499 | if (smk_parse_rule(data, &rule, 1)) |
500 | goto out; | |
f7112e6c CS |
501 | } |
502 | ||
272cd7a8 CS |
503 | if (rule_list == NULL) { |
504 | load = 1; | |
470043ba TS |
505 | rule_list = &rule.smk_subject->smk_rules; |
506 | rule_lock = &rule.smk_subject->smk_rules_lock; | |
272cd7a8 CS |
507 | } |
508 | ||
470043ba TS |
509 | rc = smk_set_access(&rule, rule_list, rule_lock, load); |
510 | if (rc == 0) | |
e05b6f98 | 511 | rc = count; |
e114e473 CS |
512 | out: |
513 | kfree(data); | |
514 | return rc; | |
515 | } | |
516 | ||
7898e1f8 | 517 | /* |
40809565 | 518 | * Core logic for smackfs seq list operations. |
7898e1f8 CS |
519 | */ |
520 | ||
40809565 CS |
521 | static void *smk_seq_start(struct seq_file *s, loff_t *pos, |
522 | struct list_head *head) | |
7898e1f8 | 523 | { |
272cd7a8 CS |
524 | struct list_head *list; |
525 | ||
526 | /* | |
527 | * This is 0 the first time through. | |
528 | */ | |
529 | if (s->index == 0) | |
40809565 | 530 | s->private = head; |
272cd7a8 CS |
531 | |
532 | if (s->private == NULL) | |
7898e1f8 | 533 | return NULL; |
272cd7a8 CS |
534 | |
535 | list = s->private; | |
536 | if (list_empty(list)) | |
7898e1f8 | 537 | return NULL; |
272cd7a8 CS |
538 | |
539 | if (s->index == 0) | |
540 | return list->next; | |
541 | return list; | |
7898e1f8 CS |
542 | } |
543 | ||
40809565 CS |
544 | static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos, |
545 | struct list_head *head) | |
7898e1f8 CS |
546 | { |
547 | struct list_head *list = v; | |
548 | ||
40809565 | 549 | if (list_is_last(list, head)) { |
272cd7a8 | 550 | s->private = NULL; |
7898e1f8 CS |
551 | return NULL; |
552 | } | |
272cd7a8 | 553 | s->private = list->next; |
7898e1f8 CS |
554 | return list->next; |
555 | } | |
556 | ||
40809565 CS |
557 | static void smk_seq_stop(struct seq_file *s, void *v) |
558 | { | |
559 | /* No-op */ | |
560 | } | |
561 | ||
f7112e6c | 562 | static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max) |
40809565 | 563 | { |
f7112e6c CS |
564 | /* |
565 | * Don't show any rules with label names too long for | |
566 | * interface file (/smack/load or /smack/load2) | |
567 | * because you should expect to be able to write | |
568 | * anything you read back. | |
569 | */ | |
2f823ff8 CS |
570 | if (strlen(srp->smk_subject->smk_known) >= max || |
571 | strlen(srp->smk_object) >= max) | |
f7112e6c | 572 | return; |
7898e1f8 | 573 | |
65ee7f45 RK |
574 | if (srp->smk_access == 0) |
575 | return; | |
576 | ||
2f823ff8 | 577 | seq_printf(s, "%s %s", srp->smk_subject->smk_known, srp->smk_object); |
7898e1f8 CS |
578 | |
579 | seq_putc(s, ' '); | |
580 | ||
581 | if (srp->smk_access & MAY_READ) | |
582 | seq_putc(s, 'r'); | |
583 | if (srp->smk_access & MAY_WRITE) | |
584 | seq_putc(s, 'w'); | |
585 | if (srp->smk_access & MAY_EXEC) | |
586 | seq_putc(s, 'x'); | |
587 | if (srp->smk_access & MAY_APPEND) | |
588 | seq_putc(s, 'a'); | |
589 | if (srp->smk_access & MAY_TRANSMUTE) | |
590 | seq_putc(s, 't'); | |
7898e1f8 CS |
591 | |
592 | seq_putc(s, '\n'); | |
f7112e6c CS |
593 | } |
594 | ||
595 | /* | |
596 | * Seq_file read operations for /smack/load | |
597 | */ | |
598 | ||
599 | static void *load2_seq_start(struct seq_file *s, loff_t *pos) | |
600 | { | |
601 | return smk_seq_start(s, pos, &smack_rule_list); | |
602 | } | |
603 | ||
604 | static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
605 | { | |
606 | return smk_seq_next(s, v, pos, &smack_rule_list); | |
607 | } | |
608 | ||
609 | static int load_seq_show(struct seq_file *s, void *v) | |
610 | { | |
611 | struct list_head *list = v; | |
612 | struct smack_master_list *smlp = | |
613 | list_entry(list, struct smack_master_list, list); | |
614 | ||
615 | smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN); | |
7898e1f8 CS |
616 | |
617 | return 0; | |
618 | } | |
619 | ||
7898e1f8 | 620 | static const struct seq_operations load_seq_ops = { |
f7112e6c CS |
621 | .start = load2_seq_start, |
622 | .next = load2_seq_next, | |
7898e1f8 | 623 | .show = load_seq_show, |
40809565 | 624 | .stop = smk_seq_stop, |
7898e1f8 CS |
625 | }; |
626 | ||
627 | /** | |
628 | * smk_open_load - open() for /smack/load | |
629 | * @inode: inode structure representing file | |
630 | * @file: "load" file pointer | |
631 | * | |
632 | * For reading, use load_seq_* seq_file reading operations. | |
633 | */ | |
634 | static int smk_open_load(struct inode *inode, struct file *file) | |
635 | { | |
636 | return seq_open(file, &load_seq_ops); | |
637 | } | |
638 | ||
639 | /** | |
640 | * smk_write_load - write() for /smack/load | |
641 | * @file: file pointer, not actually used | |
642 | * @buf: where to get the data from | |
643 | * @count: bytes sent | |
644 | * @ppos: where to start - must be 0 | |
645 | * | |
646 | */ | |
647 | static ssize_t smk_write_load(struct file *file, const char __user *buf, | |
648 | size_t count, loff_t *ppos) | |
649 | { | |
7898e1f8 CS |
650 | /* |
651 | * Must have privilege. | |
652 | * No partial writes. | |
653 | * Enough data must be present. | |
654 | */ | |
1880eff7 | 655 | if (!smack_privileged(CAP_MAC_ADMIN)) |
7898e1f8 CS |
656 | return -EPERM; |
657 | ||
f7112e6c CS |
658 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, |
659 | SMK_FIXED24_FMT); | |
7898e1f8 CS |
660 | } |
661 | ||
e114e473 CS |
662 | static const struct file_operations smk_load_ops = { |
663 | .open = smk_open_load, | |
664 | .read = seq_read, | |
665 | .llseek = seq_lseek, | |
666 | .write = smk_write_load, | |
cb622bbb | 667 | .release = seq_release, |
e114e473 CS |
668 | }; |
669 | ||
670 | /** | |
671 | * smk_cipso_doi - initialize the CIPSO domain | |
672 | */ | |
30aa4faf | 673 | static void smk_cipso_doi(void) |
e114e473 CS |
674 | { |
675 | int rc; | |
676 | struct cipso_v4_doi *doip; | |
6d3dc07c | 677 | struct netlbl_audit nai; |
e114e473 | 678 | |
6d3dc07c | 679 | smk_netlabel_audit_set(&nai); |
4bc87e62 | 680 | |
6d3dc07c | 681 | rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai); |
e114e473 CS |
682 | if (rc != 0) |
683 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
684 | __func__, __LINE__, rc); | |
685 | ||
686 | doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); | |
687 | if (doip == NULL) | |
688 | panic("smack: Failed to initialize cipso DOI.\n"); | |
689 | doip->map.std = NULL; | |
690 | doip->doi = smk_cipso_doi_value; | |
691 | doip->type = CIPSO_V4_MAP_PASS; | |
692 | doip->tags[0] = CIPSO_V4_TAG_RBITMAP; | |
693 | for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++) | |
694 | doip->tags[rc] = CIPSO_V4_TAG_INVALID; | |
695 | ||
6d3dc07c | 696 | rc = netlbl_cfg_cipsov4_add(doip, &nai); |
b1edeb10 | 697 | if (rc != 0) { |
6c2e8ac0 PM |
698 | printk(KERN_WARNING "%s:%d cipso add rc = %d\n", |
699 | __func__, __LINE__, rc); | |
700 | kfree(doip); | |
701 | return; | |
702 | } | |
6d3dc07c | 703 | rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai); |
6c2e8ac0 PM |
704 | if (rc != 0) { |
705 | printk(KERN_WARNING "%s:%d map add rc = %d\n", | |
e114e473 | 706 | __func__, __LINE__, rc); |
b1edeb10 | 707 | kfree(doip); |
6c2e8ac0 | 708 | return; |
b1edeb10 | 709 | } |
e114e473 CS |
710 | } |
711 | ||
4bc87e62 CS |
712 | /** |
713 | * smk_unlbl_ambient - initialize the unlabeled domain | |
251a2a95 | 714 | * @oldambient: previous domain string |
4bc87e62 | 715 | */ |
30aa4faf | 716 | static void smk_unlbl_ambient(char *oldambient) |
4bc87e62 CS |
717 | { |
718 | int rc; | |
6d3dc07c | 719 | struct netlbl_audit nai; |
4bc87e62 | 720 | |
6d3dc07c | 721 | smk_netlabel_audit_set(&nai); |
4bc87e62 CS |
722 | |
723 | if (oldambient != NULL) { | |
6d3dc07c | 724 | rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai); |
4bc87e62 CS |
725 | if (rc != 0) |
726 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
727 | __func__, __LINE__, rc); | |
728 | } | |
f7112e6c | 729 | if (smack_net_ambient == NULL) |
2f823ff8 | 730 | smack_net_ambient = &smack_known_floor; |
4bc87e62 | 731 | |
2f823ff8 | 732 | rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET, |
6d3dc07c | 733 | NULL, NULL, &nai); |
4bc87e62 CS |
734 | if (rc != 0) |
735 | printk(KERN_WARNING "%s:%d add rc = %d\n", | |
736 | __func__, __LINE__, rc); | |
737 | } | |
738 | ||
e114e473 CS |
739 | /* |
740 | * Seq_file read operations for /smack/cipso | |
741 | */ | |
742 | ||
743 | static void *cipso_seq_start(struct seq_file *s, loff_t *pos) | |
744 | { | |
40809565 | 745 | return smk_seq_start(s, pos, &smack_known_list); |
e114e473 CS |
746 | } |
747 | ||
748 | static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
749 | { | |
40809565 | 750 | return smk_seq_next(s, v, pos, &smack_known_list); |
e114e473 CS |
751 | } |
752 | ||
753 | /* | |
754 | * Print cipso labels in format: | |
755 | * label level[/cat[,cat]] | |
756 | */ | |
757 | static int cipso_seq_show(struct seq_file *s, void *v) | |
758 | { | |
7198e2ee EB |
759 | struct list_head *list = v; |
760 | struct smack_known *skp = | |
761 | list_entry(list, struct smack_known, list); | |
f7112e6c | 762 | struct netlbl_lsm_secattr_catmap *cmp = skp->smk_netlabel.attr.mls.cat; |
e114e473 | 763 | char sep = '/'; |
e114e473 | 764 | int i; |
e114e473 | 765 | |
f7112e6c CS |
766 | /* |
767 | * Don't show a label that could not have been set using | |
768 | * /smack/cipso. This is in support of the notion that | |
769 | * anything read from /smack/cipso ought to be writeable | |
770 | * to /smack/cipso. | |
771 | * | |
772 | * /smack/cipso2 should be used instead. | |
773 | */ | |
774 | if (strlen(skp->smk_known) >= SMK_LABELLEN) | |
e114e473 CS |
775 | return 0; |
776 | ||
f7112e6c | 777 | seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl); |
e114e473 | 778 | |
f7112e6c CS |
779 | for (i = netlbl_secattr_catmap_walk(cmp, 0); i >= 0; |
780 | i = netlbl_secattr_catmap_walk(cmp, i + 1)) { | |
781 | seq_printf(s, "%c%d", sep, i); | |
782 | sep = ','; | |
783 | } | |
e114e473 CS |
784 | |
785 | seq_putc(s, '\n'); | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
88e9d34c | 790 | static const struct seq_operations cipso_seq_ops = { |
e114e473 | 791 | .start = cipso_seq_start, |
e114e473 CS |
792 | .next = cipso_seq_next, |
793 | .show = cipso_seq_show, | |
40809565 | 794 | .stop = smk_seq_stop, |
e114e473 CS |
795 | }; |
796 | ||
797 | /** | |
798 | * smk_open_cipso - open() for /smack/cipso | |
799 | * @inode: inode structure representing file | |
800 | * @file: "cipso" file pointer | |
801 | * | |
802 | * Connect our cipso_seq_* operations with /smack/cipso | |
803 | * file_operations | |
804 | */ | |
805 | static int smk_open_cipso(struct inode *inode, struct file *file) | |
806 | { | |
807 | return seq_open(file, &cipso_seq_ops); | |
808 | } | |
809 | ||
810 | /** | |
f7112e6c | 811 | * smk_set_cipso - do the work for write() for cipso and cipso2 |
251a2a95 | 812 | * @file: file pointer, not actually used |
e114e473 CS |
813 | * @buf: where to get the data from |
814 | * @count: bytes sent | |
815 | * @ppos: where to start | |
f7112e6c | 816 | * @format: /smack/cipso or /smack/cipso2 |
e114e473 CS |
817 | * |
818 | * Accepts only one cipso rule per write call. | |
819 | * Returns number of bytes written or error code, as appropriate | |
820 | */ | |
f7112e6c CS |
821 | static ssize_t smk_set_cipso(struct file *file, const char __user *buf, |
822 | size_t count, loff_t *ppos, int format) | |
e114e473 CS |
823 | { |
824 | struct smack_known *skp; | |
f7112e6c CS |
825 | struct netlbl_lsm_secattr ncats; |
826 | char mapcatset[SMK_CIPSOLEN]; | |
e114e473 | 827 | int maplevel; |
f7112e6c | 828 | unsigned int cat; |
e114e473 CS |
829 | int catlen; |
830 | ssize_t rc = -EINVAL; | |
831 | char *data = NULL; | |
832 | char *rule; | |
833 | int ret; | |
834 | int i; | |
835 | ||
836 | /* | |
837 | * Must have privilege. | |
838 | * No partial writes. | |
839 | * Enough data must be present. | |
840 | */ | |
1880eff7 | 841 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
842 | return -EPERM; |
843 | if (*ppos != 0) | |
844 | return -EINVAL; | |
f7112e6c CS |
845 | if (format == SMK_FIXED24_FMT && |
846 | (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX)) | |
e114e473 CS |
847 | return -EINVAL; |
848 | ||
849 | data = kzalloc(count + 1, GFP_KERNEL); | |
850 | if (data == NULL) | |
851 | return -ENOMEM; | |
852 | ||
853 | if (copy_from_user(data, buf, count) != 0) { | |
854 | rc = -EFAULT; | |
855 | goto unlockedout; | |
856 | } | |
857 | ||
858 | data[count] = '\0'; | |
859 | rule = data; | |
860 | /* | |
861 | * Only allow one writer at a time. Writes should be | |
862 | * quite rare and small in any case. | |
863 | */ | |
864 | mutex_lock(&smack_cipso_lock); | |
865 | ||
866 | skp = smk_import_entry(rule, 0); | |
867 | if (skp == NULL) | |
868 | goto out; | |
869 | ||
f7112e6c CS |
870 | if (format == SMK_FIXED24_FMT) |
871 | rule += SMK_LABELLEN; | |
872 | else | |
0fcfee61 | 873 | rule += strlen(skp->smk_known) + 1; |
f7112e6c | 874 | |
e114e473 CS |
875 | ret = sscanf(rule, "%d", &maplevel); |
876 | if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) | |
877 | goto out; | |
878 | ||
879 | rule += SMK_DIGITLEN; | |
880 | ret = sscanf(rule, "%d", &catlen); | |
881 | if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM) | |
882 | goto out; | |
883 | ||
f7112e6c CS |
884 | if (format == SMK_FIXED24_FMT && |
885 | count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN)) | |
e114e473 CS |
886 | goto out; |
887 | ||
888 | memset(mapcatset, 0, sizeof(mapcatset)); | |
889 | ||
890 | for (i = 0; i < catlen; i++) { | |
891 | rule += SMK_DIGITLEN; | |
f7112e6c | 892 | ret = sscanf(rule, "%u", &cat); |
677264e8 | 893 | if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM) |
e114e473 CS |
894 | goto out; |
895 | ||
896 | smack_catset_bit(cat, mapcatset); | |
897 | } | |
898 | ||
f7112e6c CS |
899 | rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN); |
900 | if (rc >= 0) { | |
901 | netlbl_secattr_catmap_free(skp->smk_netlabel.attr.mls.cat); | |
902 | skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat; | |
903 | skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl; | |
904 | rc = count; | |
e114e473 CS |
905 | } |
906 | ||
e114e473 CS |
907 | out: |
908 | mutex_unlock(&smack_cipso_lock); | |
909 | unlockedout: | |
910 | kfree(data); | |
911 | return rc; | |
912 | } | |
913 | ||
f7112e6c CS |
914 | /** |
915 | * smk_write_cipso - write() for /smack/cipso | |
916 | * @file: file pointer, not actually used | |
917 | * @buf: where to get the data from | |
918 | * @count: bytes sent | |
919 | * @ppos: where to start | |
920 | * | |
921 | * Accepts only one cipso rule per write call. | |
922 | * Returns number of bytes written or error code, as appropriate | |
923 | */ | |
924 | static ssize_t smk_write_cipso(struct file *file, const char __user *buf, | |
925 | size_t count, loff_t *ppos) | |
926 | { | |
927 | return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT); | |
928 | } | |
929 | ||
e114e473 CS |
930 | static const struct file_operations smk_cipso_ops = { |
931 | .open = smk_open_cipso, | |
932 | .read = seq_read, | |
933 | .llseek = seq_lseek, | |
934 | .write = smk_write_cipso, | |
935 | .release = seq_release, | |
936 | }; | |
937 | ||
f7112e6c CS |
938 | /* |
939 | * Seq_file read operations for /smack/cipso2 | |
940 | */ | |
941 | ||
942 | /* | |
943 | * Print cipso labels in format: | |
944 | * label level[/cat[,cat]] | |
945 | */ | |
946 | static int cipso2_seq_show(struct seq_file *s, void *v) | |
947 | { | |
948 | struct list_head *list = v; | |
949 | struct smack_known *skp = | |
950 | list_entry(list, struct smack_known, list); | |
951 | struct netlbl_lsm_secattr_catmap *cmp = skp->smk_netlabel.attr.mls.cat; | |
952 | char sep = '/'; | |
953 | int i; | |
954 | ||
955 | seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl); | |
956 | ||
957 | for (i = netlbl_secattr_catmap_walk(cmp, 0); i >= 0; | |
958 | i = netlbl_secattr_catmap_walk(cmp, i + 1)) { | |
959 | seq_printf(s, "%c%d", sep, i); | |
960 | sep = ','; | |
961 | } | |
962 | ||
963 | seq_putc(s, '\n'); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | static const struct seq_operations cipso2_seq_ops = { | |
969 | .start = cipso_seq_start, | |
970 | .next = cipso_seq_next, | |
971 | .show = cipso2_seq_show, | |
972 | .stop = smk_seq_stop, | |
973 | }; | |
974 | ||
975 | /** | |
976 | * smk_open_cipso2 - open() for /smack/cipso2 | |
977 | * @inode: inode structure representing file | |
978 | * @file: "cipso2" file pointer | |
979 | * | |
980 | * Connect our cipso_seq_* operations with /smack/cipso2 | |
981 | * file_operations | |
982 | */ | |
983 | static int smk_open_cipso2(struct inode *inode, struct file *file) | |
984 | { | |
985 | return seq_open(file, &cipso2_seq_ops); | |
986 | } | |
987 | ||
988 | /** | |
989 | * smk_write_cipso2 - write() for /smack/cipso2 | |
990 | * @file: file pointer, not actually used | |
991 | * @buf: where to get the data from | |
992 | * @count: bytes sent | |
993 | * @ppos: where to start | |
994 | * | |
995 | * Accepts only one cipso rule per write call. | |
996 | * Returns number of bytes written or error code, as appropriate | |
997 | */ | |
998 | static ssize_t smk_write_cipso2(struct file *file, const char __user *buf, | |
999 | size_t count, loff_t *ppos) | |
1000 | { | |
1001 | return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT); | |
1002 | } | |
1003 | ||
1004 | static const struct file_operations smk_cipso2_ops = { | |
1005 | .open = smk_open_cipso2, | |
1006 | .read = seq_read, | |
1007 | .llseek = seq_lseek, | |
1008 | .write = smk_write_cipso2, | |
1009 | .release = seq_release, | |
1010 | }; | |
1011 | ||
6d3dc07c CS |
1012 | /* |
1013 | * Seq_file read operations for /smack/netlabel | |
1014 | */ | |
1015 | ||
1016 | static void *netlbladdr_seq_start(struct seq_file *s, loff_t *pos) | |
1017 | { | |
40809565 | 1018 | return smk_seq_start(s, pos, &smk_netlbladdr_list); |
6d3dc07c CS |
1019 | } |
1020 | ||
1021 | static void *netlbladdr_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1022 | { | |
40809565 | 1023 | return smk_seq_next(s, v, pos, &smk_netlbladdr_list); |
6d3dc07c | 1024 | } |
6d3dc07c CS |
1025 | #define BEBITS (sizeof(__be32) * 8) |
1026 | ||
1027 | /* | |
1028 | * Print host/label pairs | |
1029 | */ | |
1030 | static int netlbladdr_seq_show(struct seq_file *s, void *v) | |
1031 | { | |
7198e2ee EB |
1032 | struct list_head *list = v; |
1033 | struct smk_netlbladdr *skp = | |
1034 | list_entry(list, struct smk_netlbladdr, list); | |
6d3dc07c | 1035 | unsigned char *hp = (char *) &skp->smk_host.sin_addr.s_addr; |
113a0e45 | 1036 | int maskn; |
1037 | u32 temp_mask = be32_to_cpu(skp->smk_mask.s_addr); | |
6d3dc07c | 1038 | |
113a0e45 | 1039 | for (maskn = 0; temp_mask; temp_mask <<= 1, maskn++); |
6d3dc07c CS |
1040 | |
1041 | seq_printf(s, "%u.%u.%u.%u/%d %s\n", | |
1042 | hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label); | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
88e9d34c | 1047 | static const struct seq_operations netlbladdr_seq_ops = { |
6d3dc07c | 1048 | .start = netlbladdr_seq_start, |
6d3dc07c CS |
1049 | .next = netlbladdr_seq_next, |
1050 | .show = netlbladdr_seq_show, | |
40809565 | 1051 | .stop = smk_seq_stop, |
6d3dc07c CS |
1052 | }; |
1053 | ||
1054 | /** | |
1055 | * smk_open_netlbladdr - open() for /smack/netlabel | |
1056 | * @inode: inode structure representing file | |
1057 | * @file: "netlabel" file pointer | |
1058 | * | |
1059 | * Connect our netlbladdr_seq_* operations with /smack/netlabel | |
1060 | * file_operations | |
1061 | */ | |
1062 | static int smk_open_netlbladdr(struct inode *inode, struct file *file) | |
1063 | { | |
1064 | return seq_open(file, &netlbladdr_seq_ops); | |
1065 | } | |
1066 | ||
113a0e45 | 1067 | /** |
1068 | * smk_netlbladdr_insert | |
1069 | * @new : netlabel to insert | |
1070 | * | |
1071 | * This helper insert netlabel in the smack_netlbladdrs list | |
1072 | * sorted by netmask length (longest to smallest) | |
7198e2ee EB |
1073 | * locked by &smk_netlbladdr_lock in smk_write_netlbladdr |
1074 | * | |
113a0e45 | 1075 | */ |
1076 | static void smk_netlbladdr_insert(struct smk_netlbladdr *new) | |
1077 | { | |
7198e2ee | 1078 | struct smk_netlbladdr *m, *m_next; |
113a0e45 | 1079 | |
7198e2ee EB |
1080 | if (list_empty(&smk_netlbladdr_list)) { |
1081 | list_add_rcu(&new->list, &smk_netlbladdr_list); | |
113a0e45 | 1082 | return; |
1083 | } | |
1084 | ||
05725f7e JP |
1085 | m = list_entry_rcu(smk_netlbladdr_list.next, |
1086 | struct smk_netlbladdr, list); | |
7198e2ee | 1087 | |
113a0e45 | 1088 | /* the comparison '>' is a bit hacky, but works */ |
7198e2ee EB |
1089 | if (new->smk_mask.s_addr > m->smk_mask.s_addr) { |
1090 | list_add_rcu(&new->list, &smk_netlbladdr_list); | |
113a0e45 | 1091 | return; |
1092 | } | |
7198e2ee EB |
1093 | |
1094 | list_for_each_entry_rcu(m, &smk_netlbladdr_list, list) { | |
1095 | if (list_is_last(&m->list, &smk_netlbladdr_list)) { | |
1096 | list_add_rcu(&new->list, &m->list); | |
113a0e45 | 1097 | return; |
1098 | } | |
05725f7e JP |
1099 | m_next = list_entry_rcu(m->list.next, |
1100 | struct smk_netlbladdr, list); | |
7198e2ee EB |
1101 | if (new->smk_mask.s_addr > m_next->smk_mask.s_addr) { |
1102 | list_add_rcu(&new->list, &m->list); | |
113a0e45 | 1103 | return; |
1104 | } | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | ||
6d3dc07c CS |
1109 | /** |
1110 | * smk_write_netlbladdr - write() for /smack/netlabel | |
251a2a95 | 1111 | * @file: file pointer, not actually used |
6d3dc07c CS |
1112 | * @buf: where to get the data from |
1113 | * @count: bytes sent | |
1114 | * @ppos: where to start | |
1115 | * | |
1116 | * Accepts only one netlbladdr per write call. | |
1117 | * Returns number of bytes written or error code, as appropriate | |
1118 | */ | |
1119 | static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, | |
1120 | size_t count, loff_t *ppos) | |
1121 | { | |
1122 | struct smk_netlbladdr *skp; | |
1123 | struct sockaddr_in newname; | |
f7112e6c | 1124 | char *smack; |
6d3dc07c | 1125 | char *sp; |
f7112e6c | 1126 | char *data; |
6d3dc07c CS |
1127 | char *host = (char *)&newname.sin_addr.s_addr; |
1128 | int rc; | |
1129 | struct netlbl_audit audit_info; | |
1130 | struct in_addr mask; | |
1131 | unsigned int m; | |
7198e2ee | 1132 | int found; |
113a0e45 | 1133 | u32 mask_bits = (1<<31); |
6d3dc07c | 1134 | __be32 nsa; |
113a0e45 | 1135 | u32 temp_mask; |
6d3dc07c CS |
1136 | |
1137 | /* | |
1138 | * Must have privilege. | |
1139 | * No partial writes. | |
1140 | * Enough data must be present. | |
1141 | * "<addr/mask, as a.b.c.d/e><space><label>" | |
1142 | * "<addr, as a.b.c.d><space><label>" | |
1143 | */ | |
1880eff7 | 1144 | if (!smack_privileged(CAP_MAC_ADMIN)) |
6d3dc07c CS |
1145 | return -EPERM; |
1146 | if (*ppos != 0) | |
1147 | return -EINVAL; | |
f7112e6c | 1148 | if (count < SMK_NETLBLADDRMIN) |
6d3dc07c | 1149 | return -EINVAL; |
f7112e6c CS |
1150 | |
1151 | data = kzalloc(count + 1, GFP_KERNEL); | |
1152 | if (data == NULL) | |
1153 | return -ENOMEM; | |
1154 | ||
1155 | if (copy_from_user(data, buf, count) != 0) { | |
1156 | rc = -EFAULT; | |
1157 | goto free_data_out; | |
1158 | } | |
1159 | ||
1160 | smack = kzalloc(count + 1, GFP_KERNEL); | |
1161 | if (smack == NULL) { | |
1162 | rc = -ENOMEM; | |
1163 | goto free_data_out; | |
1164 | } | |
6d3dc07c CS |
1165 | |
1166 | data[count] = '\0'; | |
1167 | ||
1168 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%d %s", | |
1169 | &host[0], &host[1], &host[2], &host[3], &m, smack); | |
1170 | if (rc != 6) { | |
1171 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s", | |
1172 | &host[0], &host[1], &host[2], &host[3], smack); | |
f7112e6c CS |
1173 | if (rc != 5) { |
1174 | rc = -EINVAL; | |
1175 | goto free_out; | |
1176 | } | |
6d3dc07c CS |
1177 | m = BEBITS; |
1178 | } | |
f7112e6c CS |
1179 | if (m > BEBITS) { |
1180 | rc = -EINVAL; | |
1181 | goto free_out; | |
1182 | } | |
6d3dc07c | 1183 | |
f7112e6c CS |
1184 | /* |
1185 | * If smack begins with '-', it is an option, don't import it | |
1186 | */ | |
4303154e EB |
1187 | if (smack[0] != '-') { |
1188 | sp = smk_import(smack, 0); | |
f7112e6c CS |
1189 | if (sp == NULL) { |
1190 | rc = -EINVAL; | |
1191 | goto free_out; | |
1192 | } | |
4303154e EB |
1193 | } else { |
1194 | /* check known options */ | |
1195 | if (strcmp(smack, smack_cipso_option) == 0) | |
1196 | sp = (char *)smack_cipso_option; | |
f7112e6c CS |
1197 | else { |
1198 | rc = -EINVAL; | |
1199 | goto free_out; | |
1200 | } | |
4303154e | 1201 | } |
6d3dc07c | 1202 | |
113a0e45 | 1203 | for (temp_mask = 0; m > 0; m--) { |
1204 | temp_mask |= mask_bits; | |
1205 | mask_bits >>= 1; | |
6d3dc07c | 1206 | } |
113a0e45 | 1207 | mask.s_addr = cpu_to_be32(temp_mask); |
1208 | ||
1209 | newname.sin_addr.s_addr &= mask.s_addr; | |
6d3dc07c CS |
1210 | /* |
1211 | * Only allow one writer at a time. Writes should be | |
1212 | * quite rare and small in any case. | |
1213 | */ | |
1214 | mutex_lock(&smk_netlbladdr_lock); | |
1215 | ||
1216 | nsa = newname.sin_addr.s_addr; | |
113a0e45 | 1217 | /* try to find if the prefix is already in the list */ |
7198e2ee EB |
1218 | found = 0; |
1219 | list_for_each_entry_rcu(skp, &smk_netlbladdr_list, list) { | |
6d3dc07c | 1220 | if (skp->smk_host.sin_addr.s_addr == nsa && |
7198e2ee EB |
1221 | skp->smk_mask.s_addr == mask.s_addr) { |
1222 | found = 1; | |
6d3dc07c | 1223 | break; |
7198e2ee EB |
1224 | } |
1225 | } | |
6d3dc07c CS |
1226 | smk_netlabel_audit_set(&audit_info); |
1227 | ||
7198e2ee | 1228 | if (found == 0) { |
6d3dc07c CS |
1229 | skp = kzalloc(sizeof(*skp), GFP_KERNEL); |
1230 | if (skp == NULL) | |
1231 | rc = -ENOMEM; | |
1232 | else { | |
1233 | rc = 0; | |
1234 | skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; | |
1235 | skp->smk_mask.s_addr = mask.s_addr; | |
6d3dc07c | 1236 | skp->smk_label = sp; |
113a0e45 | 1237 | smk_netlbladdr_insert(skp); |
6d3dc07c CS |
1238 | } |
1239 | } else { | |
4303154e | 1240 | /* we delete the unlabeled entry, only if the previous label |
25985edc | 1241 | * wasn't the special CIPSO option */ |
4303154e EB |
1242 | if (skp->smk_label != smack_cipso_option) |
1243 | rc = netlbl_cfg_unlbl_static_del(&init_net, NULL, | |
1244 | &skp->smk_host.sin_addr, &skp->smk_mask, | |
1245 | PF_INET, &audit_info); | |
1246 | else | |
1247 | rc = 0; | |
6d3dc07c CS |
1248 | skp->smk_label = sp; |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Now tell netlabel about the single label nature of | |
1253 | * this host so that incoming packets get labeled. | |
4303154e | 1254 | * but only if we didn't get the special CIPSO option |
6d3dc07c | 1255 | */ |
4303154e | 1256 | if (rc == 0 && sp != smack_cipso_option) |
6d3dc07c CS |
1257 | rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, |
1258 | &skp->smk_host.sin_addr, &skp->smk_mask, PF_INET, | |
1259 | smack_to_secid(skp->smk_label), &audit_info); | |
1260 | ||
1261 | if (rc == 0) | |
1262 | rc = count; | |
1263 | ||
1264 | mutex_unlock(&smk_netlbladdr_lock); | |
1265 | ||
f7112e6c CS |
1266 | free_out: |
1267 | kfree(smack); | |
1268 | free_data_out: | |
1269 | kfree(data); | |
1270 | ||
6d3dc07c CS |
1271 | return rc; |
1272 | } | |
1273 | ||
1274 | static const struct file_operations smk_netlbladdr_ops = { | |
1275 | .open = smk_open_netlbladdr, | |
1276 | .read = seq_read, | |
1277 | .llseek = seq_lseek, | |
1278 | .write = smk_write_netlbladdr, | |
1279 | .release = seq_release, | |
1280 | }; | |
1281 | ||
e114e473 CS |
1282 | /** |
1283 | * smk_read_doi - read() for /smack/doi | |
1284 | * @filp: file pointer, not actually used | |
1285 | * @buf: where to put the result | |
1286 | * @count: maximum to send along | |
1287 | * @ppos: where to start | |
1288 | * | |
1289 | * Returns number of bytes read or error code, as appropriate | |
1290 | */ | |
1291 | static ssize_t smk_read_doi(struct file *filp, char __user *buf, | |
1292 | size_t count, loff_t *ppos) | |
1293 | { | |
1294 | char temp[80]; | |
1295 | ssize_t rc; | |
1296 | ||
1297 | if (*ppos != 0) | |
1298 | return 0; | |
1299 | ||
1300 | sprintf(temp, "%d", smk_cipso_doi_value); | |
1301 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1302 | ||
1303 | return rc; | |
1304 | } | |
1305 | ||
1306 | /** | |
1307 | * smk_write_doi - write() for /smack/doi | |
251a2a95 | 1308 | * @file: file pointer, not actually used |
e114e473 CS |
1309 | * @buf: where to get the data from |
1310 | * @count: bytes sent | |
1311 | * @ppos: where to start | |
1312 | * | |
1313 | * Returns number of bytes written or error code, as appropriate | |
1314 | */ | |
1315 | static ssize_t smk_write_doi(struct file *file, const char __user *buf, | |
1316 | size_t count, loff_t *ppos) | |
1317 | { | |
1318 | char temp[80]; | |
1319 | int i; | |
1320 | ||
1880eff7 | 1321 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1322 | return -EPERM; |
1323 | ||
1324 | if (count >= sizeof(temp) || count == 0) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | if (copy_from_user(temp, buf, count) != 0) | |
1328 | return -EFAULT; | |
1329 | ||
1330 | temp[count] = '\0'; | |
1331 | ||
1332 | if (sscanf(temp, "%d", &i) != 1) | |
1333 | return -EINVAL; | |
1334 | ||
1335 | smk_cipso_doi_value = i; | |
1336 | ||
1337 | smk_cipso_doi(); | |
1338 | ||
1339 | return count; | |
1340 | } | |
1341 | ||
1342 | static const struct file_operations smk_doi_ops = { | |
1343 | .read = smk_read_doi, | |
1344 | .write = smk_write_doi, | |
6038f373 | 1345 | .llseek = default_llseek, |
e114e473 CS |
1346 | }; |
1347 | ||
1348 | /** | |
1349 | * smk_read_direct - read() for /smack/direct | |
1350 | * @filp: file pointer, not actually used | |
1351 | * @buf: where to put the result | |
1352 | * @count: maximum to send along | |
1353 | * @ppos: where to start | |
1354 | * | |
1355 | * Returns number of bytes read or error code, as appropriate | |
1356 | */ | |
1357 | static ssize_t smk_read_direct(struct file *filp, char __user *buf, | |
1358 | size_t count, loff_t *ppos) | |
1359 | { | |
1360 | char temp[80]; | |
1361 | ssize_t rc; | |
1362 | ||
1363 | if (*ppos != 0) | |
1364 | return 0; | |
1365 | ||
1366 | sprintf(temp, "%d", smack_cipso_direct); | |
1367 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1368 | ||
1369 | return rc; | |
1370 | } | |
1371 | ||
1372 | /** | |
1373 | * smk_write_direct - write() for /smack/direct | |
251a2a95 | 1374 | * @file: file pointer, not actually used |
e114e473 CS |
1375 | * @buf: where to get the data from |
1376 | * @count: bytes sent | |
1377 | * @ppos: where to start | |
1378 | * | |
1379 | * Returns number of bytes written or error code, as appropriate | |
1380 | */ | |
1381 | static ssize_t smk_write_direct(struct file *file, const char __user *buf, | |
1382 | size_t count, loff_t *ppos) | |
1383 | { | |
f7112e6c | 1384 | struct smack_known *skp; |
e114e473 CS |
1385 | char temp[80]; |
1386 | int i; | |
1387 | ||
1880eff7 | 1388 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1389 | return -EPERM; |
1390 | ||
1391 | if (count >= sizeof(temp) || count == 0) | |
1392 | return -EINVAL; | |
1393 | ||
1394 | if (copy_from_user(temp, buf, count) != 0) | |
1395 | return -EFAULT; | |
1396 | ||
1397 | temp[count] = '\0'; | |
1398 | ||
1399 | if (sscanf(temp, "%d", &i) != 1) | |
1400 | return -EINVAL; | |
1401 | ||
f7112e6c CS |
1402 | /* |
1403 | * Don't do anything if the value hasn't actually changed. | |
1404 | * If it is changing reset the level on entries that were | |
1405 | * set up to be direct when they were created. | |
1406 | */ | |
1407 | if (smack_cipso_direct != i) { | |
1408 | mutex_lock(&smack_known_lock); | |
1409 | list_for_each_entry_rcu(skp, &smack_known_list, list) | |
1410 | if (skp->smk_netlabel.attr.mls.lvl == | |
1411 | smack_cipso_direct) | |
1412 | skp->smk_netlabel.attr.mls.lvl = i; | |
1413 | smack_cipso_direct = i; | |
1414 | mutex_unlock(&smack_known_lock); | |
1415 | } | |
e114e473 CS |
1416 | |
1417 | return count; | |
1418 | } | |
1419 | ||
1420 | static const struct file_operations smk_direct_ops = { | |
1421 | .read = smk_read_direct, | |
1422 | .write = smk_write_direct, | |
6038f373 | 1423 | .llseek = default_llseek, |
e114e473 CS |
1424 | }; |
1425 | ||
f7112e6c CS |
1426 | /** |
1427 | * smk_read_mapped - read() for /smack/mapped | |
1428 | * @filp: file pointer, not actually used | |
1429 | * @buf: where to put the result | |
1430 | * @count: maximum to send along | |
1431 | * @ppos: where to start | |
1432 | * | |
1433 | * Returns number of bytes read or error code, as appropriate | |
1434 | */ | |
1435 | static ssize_t smk_read_mapped(struct file *filp, char __user *buf, | |
1436 | size_t count, loff_t *ppos) | |
1437 | { | |
1438 | char temp[80]; | |
1439 | ssize_t rc; | |
1440 | ||
1441 | if (*ppos != 0) | |
1442 | return 0; | |
1443 | ||
1444 | sprintf(temp, "%d", smack_cipso_mapped); | |
1445 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1446 | ||
1447 | return rc; | |
1448 | } | |
1449 | ||
1450 | /** | |
1451 | * smk_write_mapped - write() for /smack/mapped | |
1452 | * @file: file pointer, not actually used | |
1453 | * @buf: where to get the data from | |
1454 | * @count: bytes sent | |
1455 | * @ppos: where to start | |
1456 | * | |
1457 | * Returns number of bytes written or error code, as appropriate | |
1458 | */ | |
1459 | static ssize_t smk_write_mapped(struct file *file, const char __user *buf, | |
1460 | size_t count, loff_t *ppos) | |
1461 | { | |
1462 | struct smack_known *skp; | |
1463 | char temp[80]; | |
1464 | int i; | |
1465 | ||
1880eff7 | 1466 | if (!smack_privileged(CAP_MAC_ADMIN)) |
f7112e6c CS |
1467 | return -EPERM; |
1468 | ||
1469 | if (count >= sizeof(temp) || count == 0) | |
1470 | return -EINVAL; | |
1471 | ||
1472 | if (copy_from_user(temp, buf, count) != 0) | |
1473 | return -EFAULT; | |
1474 | ||
1475 | temp[count] = '\0'; | |
1476 | ||
1477 | if (sscanf(temp, "%d", &i) != 1) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | /* | |
1481 | * Don't do anything if the value hasn't actually changed. | |
1482 | * If it is changing reset the level on entries that were | |
1483 | * set up to be mapped when they were created. | |
1484 | */ | |
1485 | if (smack_cipso_mapped != i) { | |
1486 | mutex_lock(&smack_known_lock); | |
1487 | list_for_each_entry_rcu(skp, &smack_known_list, list) | |
1488 | if (skp->smk_netlabel.attr.mls.lvl == | |
1489 | smack_cipso_mapped) | |
1490 | skp->smk_netlabel.attr.mls.lvl = i; | |
1491 | smack_cipso_mapped = i; | |
1492 | mutex_unlock(&smack_known_lock); | |
1493 | } | |
1494 | ||
1495 | return count; | |
1496 | } | |
1497 | ||
1498 | static const struct file_operations smk_mapped_ops = { | |
1499 | .read = smk_read_mapped, | |
1500 | .write = smk_write_mapped, | |
1501 | .llseek = default_llseek, | |
1502 | }; | |
1503 | ||
e114e473 CS |
1504 | /** |
1505 | * smk_read_ambient - read() for /smack/ambient | |
1506 | * @filp: file pointer, not actually used | |
1507 | * @buf: where to put the result | |
1508 | * @cn: maximum to send along | |
1509 | * @ppos: where to start | |
1510 | * | |
1511 | * Returns number of bytes read or error code, as appropriate | |
1512 | */ | |
1513 | static ssize_t smk_read_ambient(struct file *filp, char __user *buf, | |
1514 | size_t cn, loff_t *ppos) | |
1515 | { | |
1516 | ssize_t rc; | |
e114e473 CS |
1517 | int asize; |
1518 | ||
1519 | if (*ppos != 0) | |
1520 | return 0; | |
1521 | /* | |
1522 | * Being careful to avoid a problem in the case where | |
1523 | * smack_net_ambient gets changed in midstream. | |
e114e473 | 1524 | */ |
4bc87e62 | 1525 | mutex_lock(&smack_ambient_lock); |
e114e473 | 1526 | |
2f823ff8 | 1527 | asize = strlen(smack_net_ambient->smk_known) + 1; |
4bc87e62 CS |
1528 | |
1529 | if (cn >= asize) | |
1530 | rc = simple_read_from_buffer(buf, cn, ppos, | |
2f823ff8 CS |
1531 | smack_net_ambient->smk_known, |
1532 | asize); | |
4bc87e62 CS |
1533 | else |
1534 | rc = -EINVAL; | |
e114e473 | 1535 | |
4bc87e62 | 1536 | mutex_unlock(&smack_ambient_lock); |
e114e473 CS |
1537 | |
1538 | return rc; | |
1539 | } | |
1540 | ||
1541 | /** | |
1542 | * smk_write_ambient - write() for /smack/ambient | |
251a2a95 | 1543 | * @file: file pointer, not actually used |
e114e473 CS |
1544 | * @buf: where to get the data from |
1545 | * @count: bytes sent | |
1546 | * @ppos: where to start | |
1547 | * | |
1548 | * Returns number of bytes written or error code, as appropriate | |
1549 | */ | |
1550 | static ssize_t smk_write_ambient(struct file *file, const char __user *buf, | |
1551 | size_t count, loff_t *ppos) | |
1552 | { | |
2f823ff8 | 1553 | struct smack_known *skp; |
4bc87e62 | 1554 | char *oldambient; |
f7112e6c CS |
1555 | char *data; |
1556 | int rc = count; | |
e114e473 | 1557 | |
1880eff7 | 1558 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1559 | return -EPERM; |
1560 | ||
f7112e6c CS |
1561 | data = kzalloc(count + 1, GFP_KERNEL); |
1562 | if (data == NULL) | |
1563 | return -ENOMEM; | |
e114e473 | 1564 | |
f7112e6c CS |
1565 | if (copy_from_user(data, buf, count) != 0) { |
1566 | rc = -EFAULT; | |
1567 | goto out; | |
1568 | } | |
e114e473 | 1569 | |
2f823ff8 CS |
1570 | skp = smk_import_entry(data, count); |
1571 | if (skp == NULL) { | |
f7112e6c CS |
1572 | rc = -EINVAL; |
1573 | goto out; | |
1574 | } | |
e114e473 | 1575 | |
4bc87e62 CS |
1576 | mutex_lock(&smack_ambient_lock); |
1577 | ||
2f823ff8 CS |
1578 | oldambient = smack_net_ambient->smk_known; |
1579 | smack_net_ambient = skp; | |
4bc87e62 CS |
1580 | smk_unlbl_ambient(oldambient); |
1581 | ||
1582 | mutex_unlock(&smack_ambient_lock); | |
e114e473 | 1583 | |
f7112e6c CS |
1584 | out: |
1585 | kfree(data); | |
1586 | return rc; | |
e114e473 CS |
1587 | } |
1588 | ||
1589 | static const struct file_operations smk_ambient_ops = { | |
1590 | .read = smk_read_ambient, | |
1591 | .write = smk_write_ambient, | |
6038f373 | 1592 | .llseek = default_llseek, |
e114e473 CS |
1593 | }; |
1594 | ||
15446235 CS |
1595 | /** |
1596 | * smk_read_onlycap - read() for /smack/onlycap | |
1597 | * @filp: file pointer, not actually used | |
1598 | * @buf: where to put the result | |
1599 | * @cn: maximum to send along | |
1600 | * @ppos: where to start | |
1601 | * | |
1602 | * Returns number of bytes read or error code, as appropriate | |
1603 | */ | |
1604 | static ssize_t smk_read_onlycap(struct file *filp, char __user *buf, | |
1605 | size_t cn, loff_t *ppos) | |
1606 | { | |
1607 | char *smack = ""; | |
1608 | ssize_t rc = -EINVAL; | |
1609 | int asize; | |
1610 | ||
1611 | if (*ppos != 0) | |
1612 | return 0; | |
1613 | ||
1614 | if (smack_onlycap != NULL) | |
1615 | smack = smack_onlycap; | |
1616 | ||
1617 | asize = strlen(smack) + 1; | |
1618 | ||
1619 | if (cn >= asize) | |
1620 | rc = simple_read_from_buffer(buf, cn, ppos, smack, asize); | |
1621 | ||
1622 | return rc; | |
1623 | } | |
1624 | ||
1625 | /** | |
1626 | * smk_write_onlycap - write() for /smack/onlycap | |
251a2a95 | 1627 | * @file: file pointer, not actually used |
15446235 CS |
1628 | * @buf: where to get the data from |
1629 | * @count: bytes sent | |
1630 | * @ppos: where to start | |
1631 | * | |
1632 | * Returns number of bytes written or error code, as appropriate | |
1633 | */ | |
1634 | static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, | |
1635 | size_t count, loff_t *ppos) | |
1636 | { | |
f7112e6c | 1637 | char *data; |
2f823ff8 | 1638 | struct smack_known *skp = smk_of_task(current->cred->security); |
f7112e6c | 1639 | int rc = count; |
15446235 | 1640 | |
1880eff7 | 1641 | if (!smack_privileged(CAP_MAC_ADMIN)) |
15446235 CS |
1642 | return -EPERM; |
1643 | ||
1644 | /* | |
1645 | * This can be done using smk_access() but is done | |
1646 | * explicitly for clarity. The smk_access() implementation | |
1647 | * would use smk_access(smack_onlycap, MAY_WRITE) | |
1648 | */ | |
2f823ff8 | 1649 | if (smack_onlycap != NULL && smack_onlycap != skp->smk_known) |
15446235 CS |
1650 | return -EPERM; |
1651 | ||
f7112e6c CS |
1652 | data = kzalloc(count, GFP_KERNEL); |
1653 | if (data == NULL) | |
1654 | return -ENOMEM; | |
15446235 CS |
1655 | |
1656 | /* | |
1657 | * Should the null string be passed in unset the onlycap value. | |
1658 | * This seems like something to be careful with as usually | |
1659 | * smk_import only expects to return NULL for errors. It | |
1660 | * is usually the case that a nullstring or "\n" would be | |
1661 | * bad to pass to smk_import but in fact this is useful here. | |
f7112e6c CS |
1662 | * |
1663 | * smk_import will also reject a label beginning with '-', | |
1664 | * so "-usecapabilities" will also work. | |
15446235 | 1665 | */ |
f7112e6c CS |
1666 | if (copy_from_user(data, buf, count) != 0) |
1667 | rc = -EFAULT; | |
1668 | else | |
1669 | smack_onlycap = smk_import(data, count); | |
15446235 | 1670 | |
f7112e6c CS |
1671 | kfree(data); |
1672 | return rc; | |
15446235 CS |
1673 | } |
1674 | ||
1675 | static const struct file_operations smk_onlycap_ops = { | |
1676 | .read = smk_read_onlycap, | |
1677 | .write = smk_write_onlycap, | |
6038f373 | 1678 | .llseek = default_llseek, |
15446235 CS |
1679 | }; |
1680 | ||
ecfcc53f EB |
1681 | /** |
1682 | * smk_read_logging - read() for /smack/logging | |
1683 | * @filp: file pointer, not actually used | |
1684 | * @buf: where to put the result | |
1685 | * @cn: maximum to send along | |
1686 | * @ppos: where to start | |
1687 | * | |
1688 | * Returns number of bytes read or error code, as appropriate | |
1689 | */ | |
1690 | static ssize_t smk_read_logging(struct file *filp, char __user *buf, | |
1691 | size_t count, loff_t *ppos) | |
1692 | { | |
1693 | char temp[32]; | |
1694 | ssize_t rc; | |
1695 | ||
1696 | if (*ppos != 0) | |
1697 | return 0; | |
1698 | ||
1699 | sprintf(temp, "%d\n", log_policy); | |
1700 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1701 | return rc; | |
1702 | } | |
1703 | ||
1704 | /** | |
1705 | * smk_write_logging - write() for /smack/logging | |
1706 | * @file: file pointer, not actually used | |
1707 | * @buf: where to get the data from | |
1708 | * @count: bytes sent | |
1709 | * @ppos: where to start | |
1710 | * | |
1711 | * Returns number of bytes written or error code, as appropriate | |
1712 | */ | |
1713 | static ssize_t smk_write_logging(struct file *file, const char __user *buf, | |
1714 | size_t count, loff_t *ppos) | |
1715 | { | |
1716 | char temp[32]; | |
1717 | int i; | |
1718 | ||
1880eff7 | 1719 | if (!smack_privileged(CAP_MAC_ADMIN)) |
ecfcc53f EB |
1720 | return -EPERM; |
1721 | ||
1722 | if (count >= sizeof(temp) || count == 0) | |
1723 | return -EINVAL; | |
1724 | ||
1725 | if (copy_from_user(temp, buf, count) != 0) | |
1726 | return -EFAULT; | |
1727 | ||
1728 | temp[count] = '\0'; | |
1729 | ||
1730 | if (sscanf(temp, "%d", &i) != 1) | |
1731 | return -EINVAL; | |
1732 | if (i < 0 || i > 3) | |
1733 | return -EINVAL; | |
1734 | log_policy = i; | |
1735 | return count; | |
1736 | } | |
1737 | ||
1738 | ||
1739 | ||
1740 | static const struct file_operations smk_logging_ops = { | |
1741 | .read = smk_read_logging, | |
1742 | .write = smk_write_logging, | |
6038f373 | 1743 | .llseek = default_llseek, |
ecfcc53f | 1744 | }; |
7898e1f8 CS |
1745 | |
1746 | /* | |
1747 | * Seq_file read operations for /smack/load-self | |
1748 | */ | |
1749 | ||
1750 | static void *load_self_seq_start(struct seq_file *s, loff_t *pos) | |
1751 | { | |
1752 | struct task_smack *tsp = current_security(); | |
1753 | ||
40809565 | 1754 | return smk_seq_start(s, pos, &tsp->smk_rules); |
7898e1f8 CS |
1755 | } |
1756 | ||
1757 | static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1758 | { | |
1759 | struct task_smack *tsp = current_security(); | |
7898e1f8 | 1760 | |
40809565 | 1761 | return smk_seq_next(s, v, pos, &tsp->smk_rules); |
7898e1f8 CS |
1762 | } |
1763 | ||
1764 | static int load_self_seq_show(struct seq_file *s, void *v) | |
1765 | { | |
1766 | struct list_head *list = v; | |
1767 | struct smack_rule *srp = | |
1768 | list_entry(list, struct smack_rule, list); | |
1769 | ||
f7112e6c | 1770 | smk_rule_show(s, srp, SMK_LABELLEN); |
7898e1f8 CS |
1771 | |
1772 | return 0; | |
1773 | } | |
1774 | ||
7898e1f8 CS |
1775 | static const struct seq_operations load_self_seq_ops = { |
1776 | .start = load_self_seq_start, | |
1777 | .next = load_self_seq_next, | |
1778 | .show = load_self_seq_show, | |
40809565 | 1779 | .stop = smk_seq_stop, |
7898e1f8 CS |
1780 | }; |
1781 | ||
1782 | ||
1783 | /** | |
f7112e6c | 1784 | * smk_open_load_self - open() for /smack/load-self2 |
7898e1f8 CS |
1785 | * @inode: inode structure representing file |
1786 | * @file: "load" file pointer | |
1787 | * | |
1788 | * For reading, use load_seq_* seq_file reading operations. | |
1789 | */ | |
1790 | static int smk_open_load_self(struct inode *inode, struct file *file) | |
1791 | { | |
1792 | return seq_open(file, &load_self_seq_ops); | |
1793 | } | |
1794 | ||
1795 | /** | |
1796 | * smk_write_load_self - write() for /smack/load-self | |
1797 | * @file: file pointer, not actually used | |
1798 | * @buf: where to get the data from | |
1799 | * @count: bytes sent | |
1800 | * @ppos: where to start - must be 0 | |
1801 | * | |
1802 | */ | |
1803 | static ssize_t smk_write_load_self(struct file *file, const char __user *buf, | |
1804 | size_t count, loff_t *ppos) | |
1805 | { | |
1806 | struct task_smack *tsp = current_security(); | |
1807 | ||
f7112e6c CS |
1808 | return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules, |
1809 | &tsp->smk_rules_lock, SMK_FIXED24_FMT); | |
7898e1f8 CS |
1810 | } |
1811 | ||
1812 | static const struct file_operations smk_load_self_ops = { | |
1813 | .open = smk_open_load_self, | |
1814 | .read = seq_read, | |
1815 | .llseek = seq_lseek, | |
1816 | .write = smk_write_load_self, | |
1817 | .release = seq_release, | |
1818 | }; | |
828716c2 JS |
1819 | |
1820 | /** | |
f7112e6c | 1821 | * smk_user_access - handle access check transaction |
828716c2 JS |
1822 | * @file: file pointer |
1823 | * @buf: data from user space | |
1824 | * @count: bytes sent | |
1825 | * @ppos: where to start - must be 0 | |
1826 | */ | |
f7112e6c CS |
1827 | static ssize_t smk_user_access(struct file *file, const char __user *buf, |
1828 | size_t count, loff_t *ppos, int format) | |
828716c2 | 1829 | { |
e05b6f98 | 1830 | struct smack_parsed_rule rule; |
828716c2 | 1831 | char *data; |
f7112e6c | 1832 | char *cod; |
f8859d98 | 1833 | int res; |
828716c2 | 1834 | |
828716c2 JS |
1835 | data = simple_transaction_get(file, buf, count); |
1836 | if (IS_ERR(data)) | |
1837 | return PTR_ERR(data); | |
1838 | ||
f7112e6c CS |
1839 | if (format == SMK_FIXED24_FMT) { |
1840 | if (count < SMK_LOADLEN) | |
1841 | return -EINVAL; | |
1842 | res = smk_parse_rule(data, &rule, 0); | |
1843 | } else { | |
1844 | /* | |
1845 | * Copy the data to make sure the string is terminated. | |
1846 | */ | |
1847 | cod = kzalloc(count + 1, GFP_KERNEL); | |
1848 | if (cod == NULL) | |
1849 | return -ENOMEM; | |
1850 | memcpy(cod, data, count); | |
1851 | cod[count] = '\0'; | |
e05b6f98 | 1852 | res = smk_parse_long_rule(cod, &rule, 0, 0); |
f7112e6c CS |
1853 | kfree(cod); |
1854 | } | |
1855 | ||
1856 | if (res) | |
828716c2 JS |
1857 | return -EINVAL; |
1858 | ||
2f823ff8 CS |
1859 | res = smk_access(rule.smk_subject, rule.smk_object, |
1860 | rule.smk_access1, NULL); | |
f8859d98 JS |
1861 | data[0] = res == 0 ? '1' : '0'; |
1862 | data[1] = '\0'; | |
828716c2 | 1863 | |
d86b2b61 | 1864 | simple_transaction_set(file, 2); |
f7112e6c CS |
1865 | |
1866 | if (format == SMK_FIXED24_FMT) | |
1867 | return SMK_LOADLEN; | |
1868 | return count; | |
1869 | } | |
1870 | ||
1871 | /** | |
1872 | * smk_write_access - handle access check transaction | |
1873 | * @file: file pointer | |
1874 | * @buf: data from user space | |
1875 | * @count: bytes sent | |
1876 | * @ppos: where to start - must be 0 | |
1877 | */ | |
1878 | static ssize_t smk_write_access(struct file *file, const char __user *buf, | |
1879 | size_t count, loff_t *ppos) | |
1880 | { | |
1881 | return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT); | |
828716c2 JS |
1882 | } |
1883 | ||
1884 | static const struct file_operations smk_access_ops = { | |
1885 | .write = smk_write_access, | |
1886 | .read = simple_transaction_read, | |
1887 | .release = simple_transaction_release, | |
1888 | .llseek = generic_file_llseek, | |
1889 | }; | |
1890 | ||
f7112e6c CS |
1891 | |
1892 | /* | |
1893 | * Seq_file read operations for /smack/load2 | |
1894 | */ | |
1895 | ||
1896 | static int load2_seq_show(struct seq_file *s, void *v) | |
1897 | { | |
1898 | struct list_head *list = v; | |
1899 | struct smack_master_list *smlp = | |
1900 | list_entry(list, struct smack_master_list, list); | |
1901 | ||
1902 | smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL); | |
1903 | ||
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | static const struct seq_operations load2_seq_ops = { | |
1908 | .start = load2_seq_start, | |
1909 | .next = load2_seq_next, | |
1910 | .show = load2_seq_show, | |
1911 | .stop = smk_seq_stop, | |
1912 | }; | |
1913 | ||
1914 | /** | |
1915 | * smk_open_load2 - open() for /smack/load2 | |
1916 | * @inode: inode structure representing file | |
1917 | * @file: "load2" file pointer | |
1918 | * | |
1919 | * For reading, use load2_seq_* seq_file reading operations. | |
1920 | */ | |
1921 | static int smk_open_load2(struct inode *inode, struct file *file) | |
1922 | { | |
1923 | return seq_open(file, &load2_seq_ops); | |
1924 | } | |
1925 | ||
1926 | /** | |
1927 | * smk_write_load2 - write() for /smack/load2 | |
1928 | * @file: file pointer, not actually used | |
1929 | * @buf: where to get the data from | |
1930 | * @count: bytes sent | |
1931 | * @ppos: where to start - must be 0 | |
1932 | * | |
1933 | */ | |
1934 | static ssize_t smk_write_load2(struct file *file, const char __user *buf, | |
1935 | size_t count, loff_t *ppos) | |
1936 | { | |
1937 | /* | |
1938 | * Must have privilege. | |
1939 | */ | |
1880eff7 | 1940 | if (!smack_privileged(CAP_MAC_ADMIN)) |
f7112e6c CS |
1941 | return -EPERM; |
1942 | ||
1943 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, | |
1944 | SMK_LONG_FMT); | |
1945 | } | |
1946 | ||
1947 | static const struct file_operations smk_load2_ops = { | |
1948 | .open = smk_open_load2, | |
1949 | .read = seq_read, | |
1950 | .llseek = seq_lseek, | |
1951 | .write = smk_write_load2, | |
1952 | .release = seq_release, | |
1953 | }; | |
1954 | ||
1955 | /* | |
1956 | * Seq_file read operations for /smack/load-self2 | |
1957 | */ | |
1958 | ||
1959 | static void *load_self2_seq_start(struct seq_file *s, loff_t *pos) | |
1960 | { | |
1961 | struct task_smack *tsp = current_security(); | |
1962 | ||
1963 | return smk_seq_start(s, pos, &tsp->smk_rules); | |
1964 | } | |
1965 | ||
1966 | static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1967 | { | |
1968 | struct task_smack *tsp = current_security(); | |
1969 | ||
1970 | return smk_seq_next(s, v, pos, &tsp->smk_rules); | |
1971 | } | |
1972 | ||
1973 | static int load_self2_seq_show(struct seq_file *s, void *v) | |
1974 | { | |
1975 | struct list_head *list = v; | |
1976 | struct smack_rule *srp = | |
1977 | list_entry(list, struct smack_rule, list); | |
1978 | ||
1979 | smk_rule_show(s, srp, SMK_LONGLABEL); | |
1980 | ||
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | static const struct seq_operations load_self2_seq_ops = { | |
1985 | .start = load_self2_seq_start, | |
1986 | .next = load_self2_seq_next, | |
1987 | .show = load_self2_seq_show, | |
1988 | .stop = smk_seq_stop, | |
1989 | }; | |
1990 | ||
1991 | /** | |
1992 | * smk_open_load_self2 - open() for /smack/load-self2 | |
1993 | * @inode: inode structure representing file | |
1994 | * @file: "load" file pointer | |
1995 | * | |
1996 | * For reading, use load_seq_* seq_file reading operations. | |
1997 | */ | |
1998 | static int smk_open_load_self2(struct inode *inode, struct file *file) | |
1999 | { | |
2000 | return seq_open(file, &load_self2_seq_ops); | |
2001 | } | |
2002 | ||
2003 | /** | |
2004 | * smk_write_load_self2 - write() for /smack/load-self2 | |
2005 | * @file: file pointer, not actually used | |
2006 | * @buf: where to get the data from | |
2007 | * @count: bytes sent | |
2008 | * @ppos: where to start - must be 0 | |
2009 | * | |
2010 | */ | |
2011 | static ssize_t smk_write_load_self2(struct file *file, const char __user *buf, | |
2012 | size_t count, loff_t *ppos) | |
2013 | { | |
2014 | struct task_smack *tsp = current_security(); | |
2015 | ||
2016 | return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules, | |
2017 | &tsp->smk_rules_lock, SMK_LONG_FMT); | |
2018 | } | |
2019 | ||
2020 | static const struct file_operations smk_load_self2_ops = { | |
2021 | .open = smk_open_load_self2, | |
2022 | .read = seq_read, | |
2023 | .llseek = seq_lseek, | |
2024 | .write = smk_write_load_self2, | |
2025 | .release = seq_release, | |
2026 | }; | |
2027 | ||
2028 | /** | |
2029 | * smk_write_access2 - handle access check transaction | |
2030 | * @file: file pointer | |
2031 | * @buf: data from user space | |
2032 | * @count: bytes sent | |
2033 | * @ppos: where to start - must be 0 | |
2034 | */ | |
2035 | static ssize_t smk_write_access2(struct file *file, const char __user *buf, | |
2036 | size_t count, loff_t *ppos) | |
2037 | { | |
2038 | return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT); | |
2039 | } | |
2040 | ||
2041 | static const struct file_operations smk_access2_ops = { | |
2042 | .write = smk_write_access2, | |
2043 | .read = simple_transaction_read, | |
2044 | .release = simple_transaction_release, | |
2045 | .llseek = generic_file_llseek, | |
2046 | }; | |
2047 | ||
449543b0 RK |
2048 | /** |
2049 | * smk_write_revoke_subj - write() for /smack/revoke-subject | |
2050 | * @file: file pointer | |
2051 | * @buf: data from user space | |
2052 | * @count: bytes sent | |
2053 | * @ppos: where to start - must be 0 | |
2054 | */ | |
2055 | static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf, | |
2056 | size_t count, loff_t *ppos) | |
2057 | { | |
2058 | char *data = NULL; | |
2059 | const char *cp = NULL; | |
2060 | struct smack_known *skp; | |
2061 | struct smack_rule *sp; | |
2062 | struct list_head *rule_list; | |
2063 | struct mutex *rule_lock; | |
2064 | int rc = count; | |
2065 | ||
2066 | if (*ppos != 0) | |
2067 | return -EINVAL; | |
2068 | ||
2069 | if (!smack_privileged(CAP_MAC_ADMIN)) | |
2070 | return -EPERM; | |
2071 | ||
2072 | if (count == 0 || count > SMK_LONGLABEL) | |
2073 | return -EINVAL; | |
2074 | ||
2075 | data = kzalloc(count, GFP_KERNEL); | |
2076 | if (data == NULL) | |
2077 | return -ENOMEM; | |
2078 | ||
2079 | if (copy_from_user(data, buf, count) != 0) { | |
2080 | rc = -EFAULT; | |
2081 | goto free_out; | |
2082 | } | |
2083 | ||
2084 | cp = smk_parse_smack(data, count); | |
2085 | if (cp == NULL) { | |
2086 | rc = -EINVAL; | |
2087 | goto free_out; | |
2088 | } | |
2089 | ||
2090 | skp = smk_find_entry(cp); | |
d15d9fad | 2091 | if (skp == NULL) |
449543b0 | 2092 | goto free_out; |
449543b0 RK |
2093 | |
2094 | rule_list = &skp->smk_rules; | |
2095 | rule_lock = &skp->smk_rules_lock; | |
2096 | ||
2097 | mutex_lock(rule_lock); | |
2098 | ||
2099 | list_for_each_entry_rcu(sp, rule_list, list) | |
2100 | sp->smk_access = 0; | |
2101 | ||
2102 | mutex_unlock(rule_lock); | |
2103 | ||
2104 | free_out: | |
2105 | kfree(data); | |
2106 | kfree(cp); | |
2107 | return rc; | |
2108 | } | |
2109 | ||
2110 | static const struct file_operations smk_revoke_subj_ops = { | |
2111 | .write = smk_write_revoke_subj, | |
2112 | .read = simple_transaction_read, | |
2113 | .release = simple_transaction_release, | |
2114 | .llseek = generic_file_llseek, | |
2115 | }; | |
2116 | ||
e9307237 CS |
2117 | static struct kset *smackfs_kset; |
2118 | /** | |
2119 | * smk_init_sysfs - initialize /sys/fs/smackfs | |
2120 | * | |
2121 | */ | |
2122 | static int smk_init_sysfs(void) | |
2123 | { | |
2124 | smackfs_kset = kset_create_and_add("smackfs", NULL, fs_kobj); | |
2125 | if (!smackfs_kset) | |
2126 | return -ENOMEM; | |
2127 | return 0; | |
2128 | } | |
2129 | ||
e05b6f98 RK |
2130 | /** |
2131 | * smk_write_change_rule - write() for /smack/change-rule | |
2132 | * @file: file pointer | |
2133 | * @buf: data from user space | |
2134 | * @count: bytes sent | |
2135 | * @ppos: where to start - must be 0 | |
2136 | */ | |
2137 | static ssize_t smk_write_change_rule(struct file *file, const char __user *buf, | |
2138 | size_t count, loff_t *ppos) | |
2139 | { | |
2140 | /* | |
2141 | * Must have privilege. | |
2142 | */ | |
2143 | if (!capable(CAP_MAC_ADMIN)) | |
2144 | return -EPERM; | |
2145 | ||
2146 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, | |
2147 | SMK_CHANGE_FMT); | |
2148 | } | |
2149 | ||
2150 | static const struct file_operations smk_change_rule_ops = { | |
2151 | .write = smk_write_change_rule, | |
2152 | .read = simple_transaction_read, | |
2153 | .release = simple_transaction_release, | |
2154 | .llseek = generic_file_llseek, | |
2155 | }; | |
2156 | ||
e114e473 CS |
2157 | /** |
2158 | * smk_fill_super - fill the /smackfs superblock | |
2159 | * @sb: the empty superblock | |
2160 | * @data: unused | |
2161 | * @silent: unused | |
2162 | * | |
2163 | * Fill in the well known entries for /smack | |
2164 | * | |
2165 | * Returns 0 on success, an error code on failure | |
2166 | */ | |
2167 | static int smk_fill_super(struct super_block *sb, void *data, int silent) | |
2168 | { | |
2169 | int rc; | |
2170 | struct inode *root_inode; | |
2171 | ||
2172 | static struct tree_descr smack_files[] = { | |
7898e1f8 CS |
2173 | [SMK_LOAD] = { |
2174 | "load", &smk_load_ops, S_IRUGO|S_IWUSR}, | |
2175 | [SMK_CIPSO] = { | |
2176 | "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR}, | |
2177 | [SMK_DOI] = { | |
2178 | "doi", &smk_doi_ops, S_IRUGO|S_IWUSR}, | |
2179 | [SMK_DIRECT] = { | |
2180 | "direct", &smk_direct_ops, S_IRUGO|S_IWUSR}, | |
2181 | [SMK_AMBIENT] = { | |
2182 | "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR}, | |
2183 | [SMK_NETLBLADDR] = { | |
2184 | "netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR}, | |
2185 | [SMK_ONLYCAP] = { | |
2186 | "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR}, | |
2187 | [SMK_LOGGING] = { | |
2188 | "logging", &smk_logging_ops, S_IRUGO|S_IWUSR}, | |
2189 | [SMK_LOAD_SELF] = { | |
2190 | "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO}, | |
828716c2 | 2191 | [SMK_ACCESSES] = { |
0e94ae17 | 2192 | "access", &smk_access_ops, S_IRUGO|S_IWUGO}, |
f7112e6c CS |
2193 | [SMK_MAPPED] = { |
2194 | "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR}, | |
2195 | [SMK_LOAD2] = { | |
2196 | "load2", &smk_load2_ops, S_IRUGO|S_IWUSR}, | |
2197 | [SMK_LOAD_SELF2] = { | |
2198 | "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO}, | |
2199 | [SMK_ACCESS2] = { | |
2200 | "access2", &smk_access2_ops, S_IRUGO|S_IWUGO}, | |
2201 | [SMK_CIPSO2] = { | |
2202 | "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR}, | |
449543b0 RK |
2203 | [SMK_REVOKE_SUBJ] = { |
2204 | "revoke-subject", &smk_revoke_subj_ops, | |
2205 | S_IRUGO|S_IWUSR}, | |
e05b6f98 RK |
2206 | [SMK_CHANGE_RULE] = { |
2207 | "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR}, | |
7898e1f8 CS |
2208 | /* last one */ |
2209 | {""} | |
e114e473 CS |
2210 | }; |
2211 | ||
2212 | rc = simple_fill_super(sb, SMACK_MAGIC, smack_files); | |
2213 | if (rc != 0) { | |
2214 | printk(KERN_ERR "%s failed %d while creating inodes\n", | |
2215 | __func__, rc); | |
2216 | return rc; | |
2217 | } | |
2218 | ||
2219 | root_inode = sb->s_root->d_inode; | |
e114e473 CS |
2220 | |
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | /** | |
fc14f2fe | 2225 | * smk_mount - get the smackfs superblock |
e114e473 CS |
2226 | * @fs_type: passed along without comment |
2227 | * @flags: passed along without comment | |
2228 | * @dev_name: passed along without comment | |
2229 | * @data: passed along without comment | |
e114e473 CS |
2230 | * |
2231 | * Just passes everything along. | |
2232 | * | |
2233 | * Returns what the lower level code does. | |
2234 | */ | |
fc14f2fe AV |
2235 | static struct dentry *smk_mount(struct file_system_type *fs_type, |
2236 | int flags, const char *dev_name, void *data) | |
e114e473 | 2237 | { |
fc14f2fe | 2238 | return mount_single(fs_type, flags, data, smk_fill_super); |
e114e473 CS |
2239 | } |
2240 | ||
2241 | static struct file_system_type smk_fs_type = { | |
2242 | .name = "smackfs", | |
fc14f2fe | 2243 | .mount = smk_mount, |
e114e473 CS |
2244 | .kill_sb = kill_litter_super, |
2245 | }; | |
2246 | ||
2247 | static struct vfsmount *smackfs_mount; | |
2248 | ||
f7112e6c CS |
2249 | static int __init smk_preset_netlabel(struct smack_known *skp) |
2250 | { | |
2251 | skp->smk_netlabel.domain = skp->smk_known; | |
2252 | skp->smk_netlabel.flags = | |
2253 | NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL; | |
2254 | return smk_netlbl_mls(smack_cipso_direct, skp->smk_known, | |
2255 | &skp->smk_netlabel, strlen(skp->smk_known)); | |
2256 | } | |
2257 | ||
e114e473 CS |
2258 | /** |
2259 | * init_smk_fs - get the smackfs superblock | |
2260 | * | |
2261 | * register the smackfs | |
2262 | * | |
076c54c5 AD |
2263 | * Do not register smackfs if Smack wasn't enabled |
2264 | * on boot. We can not put this method normally under the | |
2265 | * smack_init() code path since the security subsystem get | |
2266 | * initialized before the vfs caches. | |
2267 | * | |
2268 | * Returns true if we were not chosen on boot or if | |
2269 | * we were chosen and filesystem registration succeeded. | |
e114e473 CS |
2270 | */ |
2271 | static int __init init_smk_fs(void) | |
2272 | { | |
2273 | int err; | |
f7112e6c | 2274 | int rc; |
e114e473 | 2275 | |
076c54c5 AD |
2276 | if (!security_module_enable(&smack_ops)) |
2277 | return 0; | |
2278 | ||
e9307237 CS |
2279 | err = smk_init_sysfs(); |
2280 | if (err) | |
2281 | printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n"); | |
2282 | ||
e114e473 CS |
2283 | err = register_filesystem(&smk_fs_type); |
2284 | if (!err) { | |
2285 | smackfs_mount = kern_mount(&smk_fs_type); | |
2286 | if (IS_ERR(smackfs_mount)) { | |
2287 | printk(KERN_ERR "smackfs: could not mount!\n"); | |
2288 | err = PTR_ERR(smackfs_mount); | |
2289 | smackfs_mount = NULL; | |
2290 | } | |
2291 | } | |
2292 | ||
e114e473 | 2293 | smk_cipso_doi(); |
4bc87e62 | 2294 | smk_unlbl_ambient(NULL); |
e114e473 | 2295 | |
f7112e6c CS |
2296 | rc = smk_preset_netlabel(&smack_known_floor); |
2297 | if (err == 0 && rc < 0) | |
2298 | err = rc; | |
2299 | rc = smk_preset_netlabel(&smack_known_hat); | |
2300 | if (err == 0 && rc < 0) | |
2301 | err = rc; | |
2302 | rc = smk_preset_netlabel(&smack_known_huh); | |
2303 | if (err == 0 && rc < 0) | |
2304 | err = rc; | |
2305 | rc = smk_preset_netlabel(&smack_known_invalid); | |
2306 | if (err == 0 && rc < 0) | |
2307 | err = rc; | |
2308 | rc = smk_preset_netlabel(&smack_known_star); | |
2309 | if (err == 0 && rc < 0) | |
2310 | err = rc; | |
2311 | rc = smk_preset_netlabel(&smack_known_web); | |
2312 | if (err == 0 && rc < 0) | |
2313 | err = rc; | |
2314 | ||
e114e473 CS |
2315 | return err; |
2316 | } | |
2317 | ||
2318 | __initcall(init_smk_fs); |