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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 | 141 | #define SMK_OACCESS "rwxa" |
c0ab6e56 | 142 | #define SMK_ACCESS "rwxatl" |
5c6d1125 JS |
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; | |
c0ab6e56 CS |
285 | case 'l': |
286 | case 'L': | |
287 | perm |= MAY_LOCK; | |
288 | break; | |
e05b6f98 RK |
289 | default: |
290 | return perm; | |
291 | } | |
e114e473 CS |
292 | } |
293 | ||
294 | /** | |
f7112e6c CS |
295 | * smk_fill_rule - Fill Smack rule from strings |
296 | * @subject: subject label string | |
297 | * @object: object label string | |
e05b6f98 RK |
298 | * @access1: access string |
299 | * @access2: string with permissions to be removed | |
0e94ae17 JS |
300 | * @rule: Smack rule |
301 | * @import: if non-zero, import labels | |
3518721a | 302 | * @len: label length limit |
f7112e6c CS |
303 | * |
304 | * Returns 0 on success, -1 on failure | |
e114e473 | 305 | */ |
f7112e6c | 306 | static int smk_fill_rule(const char *subject, const char *object, |
e05b6f98 RK |
307 | const char *access1, const char *access2, |
308 | struct smack_parsed_rule *rule, int import, | |
309 | int len) | |
e114e473 | 310 | { |
f7112e6c | 311 | const char *cp; |
0e94ae17 | 312 | struct smack_known *skp; |
e114e473 | 313 | |
0e94ae17 | 314 | if (import) { |
2f823ff8 | 315 | rule->smk_subject = smk_import_entry(subject, len); |
0e94ae17 JS |
316 | if (rule->smk_subject == NULL) |
317 | return -1; | |
318 | ||
3518721a | 319 | rule->smk_object = smk_import(object, len); |
0e94ae17 JS |
320 | if (rule->smk_object == NULL) |
321 | return -1; | |
322 | } else { | |
3518721a | 323 | cp = smk_parse_smack(subject, len); |
f7112e6c CS |
324 | if (cp == NULL) |
325 | return -1; | |
326 | skp = smk_find_entry(cp); | |
327 | kfree(cp); | |
0e94ae17 JS |
328 | if (skp == NULL) |
329 | return -1; | |
2f823ff8 | 330 | rule->smk_subject = skp; |
0e94ae17 | 331 | |
3518721a | 332 | cp = smk_parse_smack(object, len); |
f7112e6c CS |
333 | if (cp == NULL) |
334 | return -1; | |
335 | skp = smk_find_entry(cp); | |
336 | kfree(cp); | |
0e94ae17 JS |
337 | if (skp == NULL) |
338 | return -1; | |
339 | rule->smk_object = skp->smk_known; | |
340 | } | |
7198e2ee | 341 | |
e05b6f98 RK |
342 | rule->smk_access1 = smk_perm_from_str(access1); |
343 | if (access2) | |
344 | rule->smk_access2 = smk_perm_from_str(access2); | |
345 | else | |
346 | rule->smk_access2 = ~rule->smk_access1; | |
e114e473 | 347 | |
3518721a | 348 | return 0; |
f7112e6c | 349 | } |
e114e473 | 350 | |
f7112e6c CS |
351 | /** |
352 | * smk_parse_rule - parse Smack rule from load string | |
353 | * @data: string to be parsed whose size is SMK_LOADLEN | |
354 | * @rule: Smack rule | |
355 | * @import: if non-zero, import labels | |
356 | * | |
357 | * Returns 0 on success, -1 on errors. | |
358 | */ | |
e05b6f98 RK |
359 | static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule, |
360 | int import) | |
f7112e6c CS |
361 | { |
362 | int rc; | |
e114e473 | 363 | |
f7112e6c | 364 | rc = smk_fill_rule(data, data + SMK_LABELLEN, |
e05b6f98 RK |
365 | data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule, |
366 | import, SMK_LABELLEN); | |
f7112e6c CS |
367 | return rc; |
368 | } | |
e114e473 | 369 | |
f7112e6c CS |
370 | /** |
371 | * smk_parse_long_rule - parse Smack rule from rule string | |
372 | * @data: string to be parsed, null terminated | |
e05b6f98 | 373 | * @rule: Will be filled with Smack parsed rule |
f7112e6c | 374 | * @import: if non-zero, import labels |
10289b0f | 375 | * @tokens: numer of substrings expected in data |
f7112e6c | 376 | * |
10289b0f | 377 | * Returns number of processed bytes on success, -1 on failure. |
f7112e6c | 378 | */ |
10289b0f RK |
379 | static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule, |
380 | int import, int tokens) | |
f7112e6c | 381 | { |
10289b0f RK |
382 | ssize_t cnt = 0; |
383 | char *tok[4]; | |
384 | int i; | |
385 | ||
386 | /* | |
387 | * Parsing the rule in-place, filling all white-spaces with '\0' | |
388 | */ | |
389 | for (i = 0; i < tokens; ++i) { | |
390 | while (isspace(data[cnt])) | |
391 | data[cnt++] = '\0'; | |
392 | ||
393 | if (data[cnt] == '\0') | |
394 | /* Unexpected end of data */ | |
395 | return -1; | |
396 | ||
397 | tok[i] = data + cnt; | |
398 | ||
399 | while (data[cnt] && !isspace(data[cnt])) | |
400 | ++cnt; | |
e05b6f98 | 401 | } |
10289b0f RK |
402 | while (isspace(data[cnt])) |
403 | data[cnt++] = '\0'; | |
f7112e6c | 404 | |
10289b0f RK |
405 | while (i < 4) |
406 | tok[i++] = NULL; | |
407 | ||
408 | if (smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0)) | |
409 | return -1; | |
410 | ||
411 | return cnt; | |
828716c2 JS |
412 | } |
413 | ||
f7112e6c CS |
414 | #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */ |
415 | #define SMK_LONG_FMT 1 /* Variable long label format */ | |
e05b6f98 | 416 | #define SMK_CHANGE_FMT 2 /* Rule modification format */ |
828716c2 | 417 | /** |
f7112e6c | 418 | * smk_write_rules_list - write() for any /smack rule file |
828716c2 JS |
419 | * @file: file pointer, not actually used |
420 | * @buf: where to get the data from | |
421 | * @count: bytes sent | |
422 | * @ppos: where to start - must be 0 | |
423 | * @rule_list: the list of rules to write to | |
424 | * @rule_lock: lock for the rule list | |
e05b6f98 | 425 | * @format: /smack/load or /smack/load2 or /smack/change-rule format. |
828716c2 JS |
426 | * |
427 | * Get one smack access rule from above. | |
f7112e6c CS |
428 | * The format for SMK_LONG_FMT is: |
429 | * "subject<whitespace>object<whitespace>access[<whitespace>...]" | |
430 | * The format for SMK_FIXED24_FMT is exactly: | |
431 | * "subject object rwxat" | |
e05b6f98 RK |
432 | * The format for SMK_CHANGE_FMT is: |
433 | * "subject<whitespace>object<whitespace> | |
434 | * acc_enable<whitespace>acc_disable[<whitespace>...]" | |
828716c2 | 435 | */ |
f7112e6c CS |
436 | static ssize_t smk_write_rules_list(struct file *file, const char __user *buf, |
437 | size_t count, loff_t *ppos, | |
438 | struct list_head *rule_list, | |
439 | struct mutex *rule_lock, int format) | |
828716c2 | 440 | { |
470043ba | 441 | struct smack_parsed_rule rule; |
828716c2 | 442 | char *data; |
10289b0f RK |
443 | int rc; |
444 | int trunc = 0; | |
445 | int tokens; | |
446 | ssize_t cnt = 0; | |
828716c2 JS |
447 | |
448 | /* | |
449 | * No partial writes. | |
450 | * Enough data must be present. | |
451 | */ | |
452 | if (*ppos != 0) | |
453 | return -EINVAL; | |
828716c2 | 454 | |
f7112e6c CS |
455 | if (format == SMK_FIXED24_FMT) { |
456 | /* | |
457 | * Minor hack for backward compatibility | |
458 | */ | |
c0ab6e56 | 459 | if (count < SMK_OLOADLEN || count > SMK_LOADLEN) |
f7112e6c | 460 | return -EINVAL; |
10289b0f RK |
461 | } else { |
462 | if (count >= PAGE_SIZE) { | |
463 | count = PAGE_SIZE - 1; | |
464 | trunc = 1; | |
465 | } | |
466 | } | |
f7112e6c | 467 | |
10289b0f | 468 | data = kmalloc(count + 1, GFP_KERNEL); |
828716c2 JS |
469 | if (data == NULL) |
470 | return -ENOMEM; | |
471 | ||
472 | if (copy_from_user(data, buf, count) != 0) { | |
473 | rc = -EFAULT; | |
474 | goto out; | |
475 | } | |
476 | ||
10289b0f RK |
477 | /* |
478 | * In case of parsing only part of user buf, | |
479 | * avoid having partial rule at the data buffer | |
480 | */ | |
481 | if (trunc) { | |
482 | while (count > 0 && (data[count - 1] != '\n')) | |
483 | --count; | |
484 | if (count == 0) { | |
485 | rc = -EINVAL; | |
470043ba | 486 | goto out; |
10289b0f | 487 | } |
f7112e6c CS |
488 | } |
489 | ||
10289b0f RK |
490 | data[count] = '\0'; |
491 | tokens = (format == SMK_CHANGE_FMT ? 4 : 3); | |
492 | while (cnt < count) { | |
493 | if (format == SMK_FIXED24_FMT) { | |
494 | rc = smk_parse_rule(data, &rule, 1); | |
495 | if (rc != 0) { | |
496 | rc = -EINVAL; | |
497 | goto out; | |
498 | } | |
499 | cnt = count; | |
500 | } else { | |
501 | rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens); | |
502 | if (rc <= 0) { | |
503 | rc = -EINVAL; | |
504 | goto out; | |
505 | } | |
506 | cnt += rc; | |
507 | } | |
508 | ||
509 | if (rule_list == NULL) | |
510 | rc = smk_set_access(&rule, &rule.smk_subject->smk_rules, | |
511 | &rule.smk_subject->smk_rules_lock, 1); | |
512 | else | |
513 | rc = smk_set_access(&rule, rule_list, rule_lock, 0); | |
514 | ||
515 | if (rc) | |
516 | goto out; | |
272cd7a8 CS |
517 | } |
518 | ||
10289b0f | 519 | rc = cnt; |
e114e473 CS |
520 | out: |
521 | kfree(data); | |
522 | return rc; | |
523 | } | |
524 | ||
7898e1f8 | 525 | /* |
40809565 | 526 | * Core logic for smackfs seq list operations. |
7898e1f8 CS |
527 | */ |
528 | ||
40809565 CS |
529 | static void *smk_seq_start(struct seq_file *s, loff_t *pos, |
530 | struct list_head *head) | |
7898e1f8 | 531 | { |
272cd7a8 CS |
532 | struct list_head *list; |
533 | ||
534 | /* | |
535 | * This is 0 the first time through. | |
536 | */ | |
537 | if (s->index == 0) | |
40809565 | 538 | s->private = head; |
272cd7a8 CS |
539 | |
540 | if (s->private == NULL) | |
7898e1f8 | 541 | return NULL; |
272cd7a8 CS |
542 | |
543 | list = s->private; | |
544 | if (list_empty(list)) | |
7898e1f8 | 545 | return NULL; |
272cd7a8 CS |
546 | |
547 | if (s->index == 0) | |
548 | return list->next; | |
549 | return list; | |
7898e1f8 CS |
550 | } |
551 | ||
40809565 CS |
552 | static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos, |
553 | struct list_head *head) | |
7898e1f8 CS |
554 | { |
555 | struct list_head *list = v; | |
556 | ||
40809565 | 557 | if (list_is_last(list, head)) { |
272cd7a8 | 558 | s->private = NULL; |
7898e1f8 CS |
559 | return NULL; |
560 | } | |
272cd7a8 | 561 | s->private = list->next; |
7898e1f8 CS |
562 | return list->next; |
563 | } | |
564 | ||
40809565 CS |
565 | static void smk_seq_stop(struct seq_file *s, void *v) |
566 | { | |
567 | /* No-op */ | |
568 | } | |
569 | ||
f7112e6c | 570 | static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max) |
40809565 | 571 | { |
f7112e6c CS |
572 | /* |
573 | * Don't show any rules with label names too long for | |
574 | * interface file (/smack/load or /smack/load2) | |
575 | * because you should expect to be able to write | |
576 | * anything you read back. | |
577 | */ | |
2f823ff8 CS |
578 | if (strlen(srp->smk_subject->smk_known) >= max || |
579 | strlen(srp->smk_object) >= max) | |
f7112e6c | 580 | return; |
7898e1f8 | 581 | |
65ee7f45 RK |
582 | if (srp->smk_access == 0) |
583 | return; | |
584 | ||
2f823ff8 | 585 | seq_printf(s, "%s %s", srp->smk_subject->smk_known, srp->smk_object); |
7898e1f8 CS |
586 | |
587 | seq_putc(s, ' '); | |
588 | ||
589 | if (srp->smk_access & MAY_READ) | |
590 | seq_putc(s, 'r'); | |
591 | if (srp->smk_access & MAY_WRITE) | |
592 | seq_putc(s, 'w'); | |
593 | if (srp->smk_access & MAY_EXEC) | |
594 | seq_putc(s, 'x'); | |
595 | if (srp->smk_access & MAY_APPEND) | |
596 | seq_putc(s, 'a'); | |
597 | if (srp->smk_access & MAY_TRANSMUTE) | |
598 | seq_putc(s, 't'); | |
c0ab6e56 CS |
599 | if (srp->smk_access & MAY_LOCK) |
600 | seq_putc(s, 'l'); | |
7898e1f8 CS |
601 | |
602 | seq_putc(s, '\n'); | |
f7112e6c CS |
603 | } |
604 | ||
605 | /* | |
606 | * Seq_file read operations for /smack/load | |
607 | */ | |
608 | ||
609 | static void *load2_seq_start(struct seq_file *s, loff_t *pos) | |
610 | { | |
611 | return smk_seq_start(s, pos, &smack_rule_list); | |
612 | } | |
613 | ||
614 | static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
615 | { | |
616 | return smk_seq_next(s, v, pos, &smack_rule_list); | |
617 | } | |
618 | ||
619 | static int load_seq_show(struct seq_file *s, void *v) | |
620 | { | |
621 | struct list_head *list = v; | |
622 | struct smack_master_list *smlp = | |
623 | list_entry(list, struct smack_master_list, list); | |
624 | ||
625 | smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN); | |
7898e1f8 CS |
626 | |
627 | return 0; | |
628 | } | |
629 | ||
7898e1f8 | 630 | static const struct seq_operations load_seq_ops = { |
f7112e6c CS |
631 | .start = load2_seq_start, |
632 | .next = load2_seq_next, | |
7898e1f8 | 633 | .show = load_seq_show, |
40809565 | 634 | .stop = smk_seq_stop, |
7898e1f8 CS |
635 | }; |
636 | ||
637 | /** | |
638 | * smk_open_load - open() for /smack/load | |
639 | * @inode: inode structure representing file | |
640 | * @file: "load" file pointer | |
641 | * | |
642 | * For reading, use load_seq_* seq_file reading operations. | |
643 | */ | |
644 | static int smk_open_load(struct inode *inode, struct file *file) | |
645 | { | |
646 | return seq_open(file, &load_seq_ops); | |
647 | } | |
648 | ||
649 | /** | |
650 | * smk_write_load - write() for /smack/load | |
651 | * @file: file pointer, not actually used | |
652 | * @buf: where to get the data from | |
653 | * @count: bytes sent | |
654 | * @ppos: where to start - must be 0 | |
655 | * | |
656 | */ | |
657 | static ssize_t smk_write_load(struct file *file, const char __user *buf, | |
658 | size_t count, loff_t *ppos) | |
659 | { | |
7898e1f8 CS |
660 | /* |
661 | * Must have privilege. | |
662 | * No partial writes. | |
663 | * Enough data must be present. | |
664 | */ | |
1880eff7 | 665 | if (!smack_privileged(CAP_MAC_ADMIN)) |
7898e1f8 CS |
666 | return -EPERM; |
667 | ||
f7112e6c CS |
668 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, |
669 | SMK_FIXED24_FMT); | |
7898e1f8 CS |
670 | } |
671 | ||
e114e473 CS |
672 | static const struct file_operations smk_load_ops = { |
673 | .open = smk_open_load, | |
674 | .read = seq_read, | |
675 | .llseek = seq_lseek, | |
676 | .write = smk_write_load, | |
cb622bbb | 677 | .release = seq_release, |
e114e473 CS |
678 | }; |
679 | ||
680 | /** | |
681 | * smk_cipso_doi - initialize the CIPSO domain | |
682 | */ | |
30aa4faf | 683 | static void smk_cipso_doi(void) |
e114e473 CS |
684 | { |
685 | int rc; | |
686 | struct cipso_v4_doi *doip; | |
6d3dc07c | 687 | struct netlbl_audit nai; |
e114e473 | 688 | |
6d3dc07c | 689 | smk_netlabel_audit_set(&nai); |
4bc87e62 | 690 | |
6d3dc07c | 691 | rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai); |
e114e473 CS |
692 | if (rc != 0) |
693 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
694 | __func__, __LINE__, rc); | |
695 | ||
696 | doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); | |
697 | if (doip == NULL) | |
698 | panic("smack: Failed to initialize cipso DOI.\n"); | |
699 | doip->map.std = NULL; | |
700 | doip->doi = smk_cipso_doi_value; | |
701 | doip->type = CIPSO_V4_MAP_PASS; | |
702 | doip->tags[0] = CIPSO_V4_TAG_RBITMAP; | |
703 | for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++) | |
704 | doip->tags[rc] = CIPSO_V4_TAG_INVALID; | |
705 | ||
6d3dc07c | 706 | rc = netlbl_cfg_cipsov4_add(doip, &nai); |
b1edeb10 | 707 | if (rc != 0) { |
6c2e8ac0 PM |
708 | printk(KERN_WARNING "%s:%d cipso add rc = %d\n", |
709 | __func__, __LINE__, rc); | |
710 | kfree(doip); | |
711 | return; | |
712 | } | |
6d3dc07c | 713 | rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai); |
6c2e8ac0 PM |
714 | if (rc != 0) { |
715 | printk(KERN_WARNING "%s:%d map add rc = %d\n", | |
e114e473 | 716 | __func__, __LINE__, rc); |
b1edeb10 | 717 | kfree(doip); |
6c2e8ac0 | 718 | return; |
b1edeb10 | 719 | } |
e114e473 CS |
720 | } |
721 | ||
4bc87e62 CS |
722 | /** |
723 | * smk_unlbl_ambient - initialize the unlabeled domain | |
251a2a95 | 724 | * @oldambient: previous domain string |
4bc87e62 | 725 | */ |
30aa4faf | 726 | static void smk_unlbl_ambient(char *oldambient) |
4bc87e62 CS |
727 | { |
728 | int rc; | |
6d3dc07c | 729 | struct netlbl_audit nai; |
4bc87e62 | 730 | |
6d3dc07c | 731 | smk_netlabel_audit_set(&nai); |
4bc87e62 CS |
732 | |
733 | if (oldambient != NULL) { | |
6d3dc07c | 734 | rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai); |
4bc87e62 CS |
735 | if (rc != 0) |
736 | printk(KERN_WARNING "%s:%d remove rc = %d\n", | |
737 | __func__, __LINE__, rc); | |
738 | } | |
f7112e6c | 739 | if (smack_net_ambient == NULL) |
2f823ff8 | 740 | smack_net_ambient = &smack_known_floor; |
4bc87e62 | 741 | |
2f823ff8 | 742 | rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET, |
6d3dc07c | 743 | NULL, NULL, &nai); |
4bc87e62 CS |
744 | if (rc != 0) |
745 | printk(KERN_WARNING "%s:%d add rc = %d\n", | |
746 | __func__, __LINE__, rc); | |
747 | } | |
748 | ||
e114e473 CS |
749 | /* |
750 | * Seq_file read operations for /smack/cipso | |
751 | */ | |
752 | ||
753 | static void *cipso_seq_start(struct seq_file *s, loff_t *pos) | |
754 | { | |
40809565 | 755 | return smk_seq_start(s, pos, &smack_known_list); |
e114e473 CS |
756 | } |
757 | ||
758 | static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
759 | { | |
40809565 | 760 | return smk_seq_next(s, v, pos, &smack_known_list); |
e114e473 CS |
761 | } |
762 | ||
763 | /* | |
764 | * Print cipso labels in format: | |
765 | * label level[/cat[,cat]] | |
766 | */ | |
767 | static int cipso_seq_show(struct seq_file *s, void *v) | |
768 | { | |
7198e2ee EB |
769 | struct list_head *list = v; |
770 | struct smack_known *skp = | |
771 | list_entry(list, struct smack_known, list); | |
f7112e6c | 772 | struct netlbl_lsm_secattr_catmap *cmp = skp->smk_netlabel.attr.mls.cat; |
e114e473 | 773 | char sep = '/'; |
e114e473 | 774 | int i; |
e114e473 | 775 | |
f7112e6c CS |
776 | /* |
777 | * Don't show a label that could not have been set using | |
778 | * /smack/cipso. This is in support of the notion that | |
779 | * anything read from /smack/cipso ought to be writeable | |
780 | * to /smack/cipso. | |
781 | * | |
782 | * /smack/cipso2 should be used instead. | |
783 | */ | |
784 | if (strlen(skp->smk_known) >= SMK_LABELLEN) | |
e114e473 CS |
785 | return 0; |
786 | ||
f7112e6c | 787 | seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl); |
e114e473 | 788 | |
f7112e6c CS |
789 | for (i = netlbl_secattr_catmap_walk(cmp, 0); i >= 0; |
790 | i = netlbl_secattr_catmap_walk(cmp, i + 1)) { | |
791 | seq_printf(s, "%c%d", sep, i); | |
792 | sep = ','; | |
793 | } | |
e114e473 CS |
794 | |
795 | seq_putc(s, '\n'); | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
88e9d34c | 800 | static const struct seq_operations cipso_seq_ops = { |
e114e473 | 801 | .start = cipso_seq_start, |
e114e473 CS |
802 | .next = cipso_seq_next, |
803 | .show = cipso_seq_show, | |
40809565 | 804 | .stop = smk_seq_stop, |
e114e473 CS |
805 | }; |
806 | ||
807 | /** | |
808 | * smk_open_cipso - open() for /smack/cipso | |
809 | * @inode: inode structure representing file | |
810 | * @file: "cipso" file pointer | |
811 | * | |
812 | * Connect our cipso_seq_* operations with /smack/cipso | |
813 | * file_operations | |
814 | */ | |
815 | static int smk_open_cipso(struct inode *inode, struct file *file) | |
816 | { | |
817 | return seq_open(file, &cipso_seq_ops); | |
818 | } | |
819 | ||
820 | /** | |
f7112e6c | 821 | * smk_set_cipso - do the work for write() for cipso and cipso2 |
251a2a95 | 822 | * @file: file pointer, not actually used |
e114e473 CS |
823 | * @buf: where to get the data from |
824 | * @count: bytes sent | |
825 | * @ppos: where to start | |
f7112e6c | 826 | * @format: /smack/cipso or /smack/cipso2 |
e114e473 CS |
827 | * |
828 | * Accepts only one cipso rule per write call. | |
829 | * Returns number of bytes written or error code, as appropriate | |
830 | */ | |
f7112e6c CS |
831 | static ssize_t smk_set_cipso(struct file *file, const char __user *buf, |
832 | size_t count, loff_t *ppos, int format) | |
e114e473 CS |
833 | { |
834 | struct smack_known *skp; | |
f7112e6c CS |
835 | struct netlbl_lsm_secattr ncats; |
836 | char mapcatset[SMK_CIPSOLEN]; | |
e114e473 | 837 | int maplevel; |
f7112e6c | 838 | unsigned int cat; |
e114e473 CS |
839 | int catlen; |
840 | ssize_t rc = -EINVAL; | |
841 | char *data = NULL; | |
842 | char *rule; | |
843 | int ret; | |
844 | int i; | |
845 | ||
846 | /* | |
847 | * Must have privilege. | |
848 | * No partial writes. | |
849 | * Enough data must be present. | |
850 | */ | |
1880eff7 | 851 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
852 | return -EPERM; |
853 | if (*ppos != 0) | |
854 | return -EINVAL; | |
f7112e6c CS |
855 | if (format == SMK_FIXED24_FMT && |
856 | (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX)) | |
e114e473 CS |
857 | return -EINVAL; |
858 | ||
859 | data = kzalloc(count + 1, GFP_KERNEL); | |
860 | if (data == NULL) | |
861 | return -ENOMEM; | |
862 | ||
863 | if (copy_from_user(data, buf, count) != 0) { | |
864 | rc = -EFAULT; | |
865 | goto unlockedout; | |
866 | } | |
867 | ||
868 | data[count] = '\0'; | |
869 | rule = data; | |
870 | /* | |
871 | * Only allow one writer at a time. Writes should be | |
872 | * quite rare and small in any case. | |
873 | */ | |
874 | mutex_lock(&smack_cipso_lock); | |
875 | ||
876 | skp = smk_import_entry(rule, 0); | |
877 | if (skp == NULL) | |
878 | goto out; | |
879 | ||
f7112e6c CS |
880 | if (format == SMK_FIXED24_FMT) |
881 | rule += SMK_LABELLEN; | |
882 | else | |
0fcfee61 | 883 | rule += strlen(skp->smk_known) + 1; |
f7112e6c | 884 | |
e114e473 CS |
885 | ret = sscanf(rule, "%d", &maplevel); |
886 | if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) | |
887 | goto out; | |
888 | ||
889 | rule += SMK_DIGITLEN; | |
890 | ret = sscanf(rule, "%d", &catlen); | |
891 | if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM) | |
892 | goto out; | |
893 | ||
f7112e6c CS |
894 | if (format == SMK_FIXED24_FMT && |
895 | count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN)) | |
e114e473 CS |
896 | goto out; |
897 | ||
898 | memset(mapcatset, 0, sizeof(mapcatset)); | |
899 | ||
900 | for (i = 0; i < catlen; i++) { | |
901 | rule += SMK_DIGITLEN; | |
f7112e6c | 902 | ret = sscanf(rule, "%u", &cat); |
677264e8 | 903 | if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM) |
e114e473 CS |
904 | goto out; |
905 | ||
906 | smack_catset_bit(cat, mapcatset); | |
907 | } | |
908 | ||
f7112e6c CS |
909 | rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN); |
910 | if (rc >= 0) { | |
911 | netlbl_secattr_catmap_free(skp->smk_netlabel.attr.mls.cat); | |
912 | skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat; | |
913 | skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl; | |
914 | rc = count; | |
e114e473 CS |
915 | } |
916 | ||
e114e473 CS |
917 | out: |
918 | mutex_unlock(&smack_cipso_lock); | |
919 | unlockedout: | |
920 | kfree(data); | |
921 | return rc; | |
922 | } | |
923 | ||
f7112e6c CS |
924 | /** |
925 | * smk_write_cipso - write() for /smack/cipso | |
926 | * @file: file pointer, not actually used | |
927 | * @buf: where to get the data from | |
928 | * @count: bytes sent | |
929 | * @ppos: where to start | |
930 | * | |
931 | * Accepts only one cipso rule per write call. | |
932 | * Returns number of bytes written or error code, as appropriate | |
933 | */ | |
934 | static ssize_t smk_write_cipso(struct file *file, const char __user *buf, | |
935 | size_t count, loff_t *ppos) | |
936 | { | |
937 | return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT); | |
938 | } | |
939 | ||
e114e473 CS |
940 | static const struct file_operations smk_cipso_ops = { |
941 | .open = smk_open_cipso, | |
942 | .read = seq_read, | |
943 | .llseek = seq_lseek, | |
944 | .write = smk_write_cipso, | |
945 | .release = seq_release, | |
946 | }; | |
947 | ||
f7112e6c CS |
948 | /* |
949 | * Seq_file read operations for /smack/cipso2 | |
950 | */ | |
951 | ||
952 | /* | |
953 | * Print cipso labels in format: | |
954 | * label level[/cat[,cat]] | |
955 | */ | |
956 | static int cipso2_seq_show(struct seq_file *s, void *v) | |
957 | { | |
958 | struct list_head *list = v; | |
959 | struct smack_known *skp = | |
960 | list_entry(list, struct smack_known, list); | |
961 | struct netlbl_lsm_secattr_catmap *cmp = skp->smk_netlabel.attr.mls.cat; | |
962 | char sep = '/'; | |
963 | int i; | |
964 | ||
965 | seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl); | |
966 | ||
967 | for (i = netlbl_secattr_catmap_walk(cmp, 0); i >= 0; | |
968 | i = netlbl_secattr_catmap_walk(cmp, i + 1)) { | |
969 | seq_printf(s, "%c%d", sep, i); | |
970 | sep = ','; | |
971 | } | |
972 | ||
973 | seq_putc(s, '\n'); | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | static const struct seq_operations cipso2_seq_ops = { | |
979 | .start = cipso_seq_start, | |
980 | .next = cipso_seq_next, | |
981 | .show = cipso2_seq_show, | |
982 | .stop = smk_seq_stop, | |
983 | }; | |
984 | ||
985 | /** | |
986 | * smk_open_cipso2 - open() for /smack/cipso2 | |
987 | * @inode: inode structure representing file | |
988 | * @file: "cipso2" file pointer | |
989 | * | |
990 | * Connect our cipso_seq_* operations with /smack/cipso2 | |
991 | * file_operations | |
992 | */ | |
993 | static int smk_open_cipso2(struct inode *inode, struct file *file) | |
994 | { | |
995 | return seq_open(file, &cipso2_seq_ops); | |
996 | } | |
997 | ||
998 | /** | |
999 | * smk_write_cipso2 - write() for /smack/cipso2 | |
1000 | * @file: file pointer, not actually used | |
1001 | * @buf: where to get the data from | |
1002 | * @count: bytes sent | |
1003 | * @ppos: where to start | |
1004 | * | |
1005 | * Accepts only one cipso rule per write call. | |
1006 | * Returns number of bytes written or error code, as appropriate | |
1007 | */ | |
1008 | static ssize_t smk_write_cipso2(struct file *file, const char __user *buf, | |
1009 | size_t count, loff_t *ppos) | |
1010 | { | |
1011 | return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT); | |
1012 | } | |
1013 | ||
1014 | static const struct file_operations smk_cipso2_ops = { | |
1015 | .open = smk_open_cipso2, | |
1016 | .read = seq_read, | |
1017 | .llseek = seq_lseek, | |
1018 | .write = smk_write_cipso2, | |
1019 | .release = seq_release, | |
1020 | }; | |
1021 | ||
6d3dc07c CS |
1022 | /* |
1023 | * Seq_file read operations for /smack/netlabel | |
1024 | */ | |
1025 | ||
1026 | static void *netlbladdr_seq_start(struct seq_file *s, loff_t *pos) | |
1027 | { | |
40809565 | 1028 | return smk_seq_start(s, pos, &smk_netlbladdr_list); |
6d3dc07c CS |
1029 | } |
1030 | ||
1031 | static void *netlbladdr_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1032 | { | |
40809565 | 1033 | return smk_seq_next(s, v, pos, &smk_netlbladdr_list); |
6d3dc07c | 1034 | } |
6d3dc07c CS |
1035 | #define BEBITS (sizeof(__be32) * 8) |
1036 | ||
1037 | /* | |
1038 | * Print host/label pairs | |
1039 | */ | |
1040 | static int netlbladdr_seq_show(struct seq_file *s, void *v) | |
1041 | { | |
7198e2ee EB |
1042 | struct list_head *list = v; |
1043 | struct smk_netlbladdr *skp = | |
1044 | list_entry(list, struct smk_netlbladdr, list); | |
6d3dc07c | 1045 | unsigned char *hp = (char *) &skp->smk_host.sin_addr.s_addr; |
113a0e45 | 1046 | int maskn; |
1047 | u32 temp_mask = be32_to_cpu(skp->smk_mask.s_addr); | |
6d3dc07c | 1048 | |
113a0e45 | 1049 | for (maskn = 0; temp_mask; temp_mask <<= 1, maskn++); |
6d3dc07c CS |
1050 | |
1051 | seq_printf(s, "%u.%u.%u.%u/%d %s\n", | |
1052 | hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label); | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
88e9d34c | 1057 | static const struct seq_operations netlbladdr_seq_ops = { |
6d3dc07c | 1058 | .start = netlbladdr_seq_start, |
6d3dc07c CS |
1059 | .next = netlbladdr_seq_next, |
1060 | .show = netlbladdr_seq_show, | |
40809565 | 1061 | .stop = smk_seq_stop, |
6d3dc07c CS |
1062 | }; |
1063 | ||
1064 | /** | |
1065 | * smk_open_netlbladdr - open() for /smack/netlabel | |
1066 | * @inode: inode structure representing file | |
1067 | * @file: "netlabel" file pointer | |
1068 | * | |
1069 | * Connect our netlbladdr_seq_* operations with /smack/netlabel | |
1070 | * file_operations | |
1071 | */ | |
1072 | static int smk_open_netlbladdr(struct inode *inode, struct file *file) | |
1073 | { | |
1074 | return seq_open(file, &netlbladdr_seq_ops); | |
1075 | } | |
1076 | ||
113a0e45 | 1077 | /** |
1078 | * smk_netlbladdr_insert | |
1079 | * @new : netlabel to insert | |
1080 | * | |
1081 | * This helper insert netlabel in the smack_netlbladdrs list | |
1082 | * sorted by netmask length (longest to smallest) | |
7198e2ee EB |
1083 | * locked by &smk_netlbladdr_lock in smk_write_netlbladdr |
1084 | * | |
113a0e45 | 1085 | */ |
1086 | static void smk_netlbladdr_insert(struct smk_netlbladdr *new) | |
1087 | { | |
7198e2ee | 1088 | struct smk_netlbladdr *m, *m_next; |
113a0e45 | 1089 | |
7198e2ee EB |
1090 | if (list_empty(&smk_netlbladdr_list)) { |
1091 | list_add_rcu(&new->list, &smk_netlbladdr_list); | |
113a0e45 | 1092 | return; |
1093 | } | |
1094 | ||
05725f7e JP |
1095 | m = list_entry_rcu(smk_netlbladdr_list.next, |
1096 | struct smk_netlbladdr, list); | |
7198e2ee | 1097 | |
113a0e45 | 1098 | /* the comparison '>' is a bit hacky, but works */ |
7198e2ee EB |
1099 | if (new->smk_mask.s_addr > m->smk_mask.s_addr) { |
1100 | list_add_rcu(&new->list, &smk_netlbladdr_list); | |
113a0e45 | 1101 | return; |
1102 | } | |
7198e2ee EB |
1103 | |
1104 | list_for_each_entry_rcu(m, &smk_netlbladdr_list, list) { | |
1105 | if (list_is_last(&m->list, &smk_netlbladdr_list)) { | |
1106 | list_add_rcu(&new->list, &m->list); | |
113a0e45 | 1107 | return; |
1108 | } | |
05725f7e JP |
1109 | m_next = list_entry_rcu(m->list.next, |
1110 | struct smk_netlbladdr, list); | |
7198e2ee EB |
1111 | if (new->smk_mask.s_addr > m_next->smk_mask.s_addr) { |
1112 | list_add_rcu(&new->list, &m->list); | |
113a0e45 | 1113 | return; |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | ||
6d3dc07c CS |
1119 | /** |
1120 | * smk_write_netlbladdr - write() for /smack/netlabel | |
251a2a95 | 1121 | * @file: file pointer, not actually used |
6d3dc07c CS |
1122 | * @buf: where to get the data from |
1123 | * @count: bytes sent | |
1124 | * @ppos: where to start | |
1125 | * | |
1126 | * Accepts only one netlbladdr per write call. | |
1127 | * Returns number of bytes written or error code, as appropriate | |
1128 | */ | |
1129 | static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, | |
1130 | size_t count, loff_t *ppos) | |
1131 | { | |
1132 | struct smk_netlbladdr *skp; | |
1133 | struct sockaddr_in newname; | |
f7112e6c | 1134 | char *smack; |
6d3dc07c | 1135 | char *sp; |
f7112e6c | 1136 | char *data; |
6d3dc07c CS |
1137 | char *host = (char *)&newname.sin_addr.s_addr; |
1138 | int rc; | |
1139 | struct netlbl_audit audit_info; | |
1140 | struct in_addr mask; | |
1141 | unsigned int m; | |
7198e2ee | 1142 | int found; |
113a0e45 | 1143 | u32 mask_bits = (1<<31); |
6d3dc07c | 1144 | __be32 nsa; |
113a0e45 | 1145 | u32 temp_mask; |
6d3dc07c CS |
1146 | |
1147 | /* | |
1148 | * Must have privilege. | |
1149 | * No partial writes. | |
1150 | * Enough data must be present. | |
1151 | * "<addr/mask, as a.b.c.d/e><space><label>" | |
1152 | * "<addr, as a.b.c.d><space><label>" | |
1153 | */ | |
1880eff7 | 1154 | if (!smack_privileged(CAP_MAC_ADMIN)) |
6d3dc07c CS |
1155 | return -EPERM; |
1156 | if (*ppos != 0) | |
1157 | return -EINVAL; | |
f7112e6c | 1158 | if (count < SMK_NETLBLADDRMIN) |
6d3dc07c | 1159 | return -EINVAL; |
f7112e6c CS |
1160 | |
1161 | data = kzalloc(count + 1, GFP_KERNEL); | |
1162 | if (data == NULL) | |
1163 | return -ENOMEM; | |
1164 | ||
1165 | if (copy_from_user(data, buf, count) != 0) { | |
1166 | rc = -EFAULT; | |
1167 | goto free_data_out; | |
1168 | } | |
1169 | ||
1170 | smack = kzalloc(count + 1, GFP_KERNEL); | |
1171 | if (smack == NULL) { | |
1172 | rc = -ENOMEM; | |
1173 | goto free_data_out; | |
1174 | } | |
6d3dc07c CS |
1175 | |
1176 | data[count] = '\0'; | |
1177 | ||
1178 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%d %s", | |
1179 | &host[0], &host[1], &host[2], &host[3], &m, smack); | |
1180 | if (rc != 6) { | |
1181 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s", | |
1182 | &host[0], &host[1], &host[2], &host[3], smack); | |
f7112e6c CS |
1183 | if (rc != 5) { |
1184 | rc = -EINVAL; | |
1185 | goto free_out; | |
1186 | } | |
6d3dc07c CS |
1187 | m = BEBITS; |
1188 | } | |
f7112e6c CS |
1189 | if (m > BEBITS) { |
1190 | rc = -EINVAL; | |
1191 | goto free_out; | |
1192 | } | |
6d3dc07c | 1193 | |
f7112e6c CS |
1194 | /* |
1195 | * If smack begins with '-', it is an option, don't import it | |
1196 | */ | |
4303154e EB |
1197 | if (smack[0] != '-') { |
1198 | sp = smk_import(smack, 0); | |
f7112e6c CS |
1199 | if (sp == NULL) { |
1200 | rc = -EINVAL; | |
1201 | goto free_out; | |
1202 | } | |
4303154e EB |
1203 | } else { |
1204 | /* check known options */ | |
1205 | if (strcmp(smack, smack_cipso_option) == 0) | |
1206 | sp = (char *)smack_cipso_option; | |
f7112e6c CS |
1207 | else { |
1208 | rc = -EINVAL; | |
1209 | goto free_out; | |
1210 | } | |
4303154e | 1211 | } |
6d3dc07c | 1212 | |
113a0e45 | 1213 | for (temp_mask = 0; m > 0; m--) { |
1214 | temp_mask |= mask_bits; | |
1215 | mask_bits >>= 1; | |
6d3dc07c | 1216 | } |
113a0e45 | 1217 | mask.s_addr = cpu_to_be32(temp_mask); |
1218 | ||
1219 | newname.sin_addr.s_addr &= mask.s_addr; | |
6d3dc07c CS |
1220 | /* |
1221 | * Only allow one writer at a time. Writes should be | |
1222 | * quite rare and small in any case. | |
1223 | */ | |
1224 | mutex_lock(&smk_netlbladdr_lock); | |
1225 | ||
1226 | nsa = newname.sin_addr.s_addr; | |
113a0e45 | 1227 | /* try to find if the prefix is already in the list */ |
7198e2ee EB |
1228 | found = 0; |
1229 | list_for_each_entry_rcu(skp, &smk_netlbladdr_list, list) { | |
6d3dc07c | 1230 | if (skp->smk_host.sin_addr.s_addr == nsa && |
7198e2ee EB |
1231 | skp->smk_mask.s_addr == mask.s_addr) { |
1232 | found = 1; | |
6d3dc07c | 1233 | break; |
7198e2ee EB |
1234 | } |
1235 | } | |
6d3dc07c CS |
1236 | smk_netlabel_audit_set(&audit_info); |
1237 | ||
7198e2ee | 1238 | if (found == 0) { |
6d3dc07c CS |
1239 | skp = kzalloc(sizeof(*skp), GFP_KERNEL); |
1240 | if (skp == NULL) | |
1241 | rc = -ENOMEM; | |
1242 | else { | |
1243 | rc = 0; | |
1244 | skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; | |
1245 | skp->smk_mask.s_addr = mask.s_addr; | |
6d3dc07c | 1246 | skp->smk_label = sp; |
113a0e45 | 1247 | smk_netlbladdr_insert(skp); |
6d3dc07c CS |
1248 | } |
1249 | } else { | |
4303154e | 1250 | /* we delete the unlabeled entry, only if the previous label |
25985edc | 1251 | * wasn't the special CIPSO option */ |
4303154e EB |
1252 | if (skp->smk_label != smack_cipso_option) |
1253 | rc = netlbl_cfg_unlbl_static_del(&init_net, NULL, | |
1254 | &skp->smk_host.sin_addr, &skp->smk_mask, | |
1255 | PF_INET, &audit_info); | |
1256 | else | |
1257 | rc = 0; | |
6d3dc07c CS |
1258 | skp->smk_label = sp; |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Now tell netlabel about the single label nature of | |
1263 | * this host so that incoming packets get labeled. | |
4303154e | 1264 | * but only if we didn't get the special CIPSO option |
6d3dc07c | 1265 | */ |
4303154e | 1266 | if (rc == 0 && sp != smack_cipso_option) |
6d3dc07c CS |
1267 | rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, |
1268 | &skp->smk_host.sin_addr, &skp->smk_mask, PF_INET, | |
1269 | smack_to_secid(skp->smk_label), &audit_info); | |
1270 | ||
1271 | if (rc == 0) | |
1272 | rc = count; | |
1273 | ||
1274 | mutex_unlock(&smk_netlbladdr_lock); | |
1275 | ||
f7112e6c CS |
1276 | free_out: |
1277 | kfree(smack); | |
1278 | free_data_out: | |
1279 | kfree(data); | |
1280 | ||
6d3dc07c CS |
1281 | return rc; |
1282 | } | |
1283 | ||
1284 | static const struct file_operations smk_netlbladdr_ops = { | |
1285 | .open = smk_open_netlbladdr, | |
1286 | .read = seq_read, | |
1287 | .llseek = seq_lseek, | |
1288 | .write = smk_write_netlbladdr, | |
1289 | .release = seq_release, | |
1290 | }; | |
1291 | ||
e114e473 CS |
1292 | /** |
1293 | * smk_read_doi - read() for /smack/doi | |
1294 | * @filp: file pointer, not actually used | |
1295 | * @buf: where to put the result | |
1296 | * @count: maximum to send along | |
1297 | * @ppos: where to start | |
1298 | * | |
1299 | * Returns number of bytes read or error code, as appropriate | |
1300 | */ | |
1301 | static ssize_t smk_read_doi(struct file *filp, char __user *buf, | |
1302 | size_t count, loff_t *ppos) | |
1303 | { | |
1304 | char temp[80]; | |
1305 | ssize_t rc; | |
1306 | ||
1307 | if (*ppos != 0) | |
1308 | return 0; | |
1309 | ||
1310 | sprintf(temp, "%d", smk_cipso_doi_value); | |
1311 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1312 | ||
1313 | return rc; | |
1314 | } | |
1315 | ||
1316 | /** | |
1317 | * smk_write_doi - write() for /smack/doi | |
251a2a95 | 1318 | * @file: file pointer, not actually used |
e114e473 CS |
1319 | * @buf: where to get the data from |
1320 | * @count: bytes sent | |
1321 | * @ppos: where to start | |
1322 | * | |
1323 | * Returns number of bytes written or error code, as appropriate | |
1324 | */ | |
1325 | static ssize_t smk_write_doi(struct file *file, const char __user *buf, | |
1326 | size_t count, loff_t *ppos) | |
1327 | { | |
1328 | char temp[80]; | |
1329 | int i; | |
1330 | ||
1880eff7 | 1331 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1332 | return -EPERM; |
1333 | ||
1334 | if (count >= sizeof(temp) || count == 0) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | if (copy_from_user(temp, buf, count) != 0) | |
1338 | return -EFAULT; | |
1339 | ||
1340 | temp[count] = '\0'; | |
1341 | ||
1342 | if (sscanf(temp, "%d", &i) != 1) | |
1343 | return -EINVAL; | |
1344 | ||
1345 | smk_cipso_doi_value = i; | |
1346 | ||
1347 | smk_cipso_doi(); | |
1348 | ||
1349 | return count; | |
1350 | } | |
1351 | ||
1352 | static const struct file_operations smk_doi_ops = { | |
1353 | .read = smk_read_doi, | |
1354 | .write = smk_write_doi, | |
6038f373 | 1355 | .llseek = default_llseek, |
e114e473 CS |
1356 | }; |
1357 | ||
1358 | /** | |
1359 | * smk_read_direct - read() for /smack/direct | |
1360 | * @filp: file pointer, not actually used | |
1361 | * @buf: where to put the result | |
1362 | * @count: maximum to send along | |
1363 | * @ppos: where to start | |
1364 | * | |
1365 | * Returns number of bytes read or error code, as appropriate | |
1366 | */ | |
1367 | static ssize_t smk_read_direct(struct file *filp, char __user *buf, | |
1368 | size_t count, loff_t *ppos) | |
1369 | { | |
1370 | char temp[80]; | |
1371 | ssize_t rc; | |
1372 | ||
1373 | if (*ppos != 0) | |
1374 | return 0; | |
1375 | ||
1376 | sprintf(temp, "%d", smack_cipso_direct); | |
1377 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1378 | ||
1379 | return rc; | |
1380 | } | |
1381 | ||
1382 | /** | |
1383 | * smk_write_direct - write() for /smack/direct | |
251a2a95 | 1384 | * @file: file pointer, not actually used |
e114e473 CS |
1385 | * @buf: where to get the data from |
1386 | * @count: bytes sent | |
1387 | * @ppos: where to start | |
1388 | * | |
1389 | * Returns number of bytes written or error code, as appropriate | |
1390 | */ | |
1391 | static ssize_t smk_write_direct(struct file *file, const char __user *buf, | |
1392 | size_t count, loff_t *ppos) | |
1393 | { | |
f7112e6c | 1394 | struct smack_known *skp; |
e114e473 CS |
1395 | char temp[80]; |
1396 | int i; | |
1397 | ||
1880eff7 | 1398 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1399 | return -EPERM; |
1400 | ||
1401 | if (count >= sizeof(temp) || count == 0) | |
1402 | return -EINVAL; | |
1403 | ||
1404 | if (copy_from_user(temp, buf, count) != 0) | |
1405 | return -EFAULT; | |
1406 | ||
1407 | temp[count] = '\0'; | |
1408 | ||
1409 | if (sscanf(temp, "%d", &i) != 1) | |
1410 | return -EINVAL; | |
1411 | ||
f7112e6c CS |
1412 | /* |
1413 | * Don't do anything if the value hasn't actually changed. | |
1414 | * If it is changing reset the level on entries that were | |
1415 | * set up to be direct when they were created. | |
1416 | */ | |
1417 | if (smack_cipso_direct != i) { | |
1418 | mutex_lock(&smack_known_lock); | |
1419 | list_for_each_entry_rcu(skp, &smack_known_list, list) | |
1420 | if (skp->smk_netlabel.attr.mls.lvl == | |
1421 | smack_cipso_direct) | |
1422 | skp->smk_netlabel.attr.mls.lvl = i; | |
1423 | smack_cipso_direct = i; | |
1424 | mutex_unlock(&smack_known_lock); | |
1425 | } | |
e114e473 CS |
1426 | |
1427 | return count; | |
1428 | } | |
1429 | ||
1430 | static const struct file_operations smk_direct_ops = { | |
1431 | .read = smk_read_direct, | |
1432 | .write = smk_write_direct, | |
6038f373 | 1433 | .llseek = default_llseek, |
e114e473 CS |
1434 | }; |
1435 | ||
f7112e6c CS |
1436 | /** |
1437 | * smk_read_mapped - read() for /smack/mapped | |
1438 | * @filp: file pointer, not actually used | |
1439 | * @buf: where to put the result | |
1440 | * @count: maximum to send along | |
1441 | * @ppos: where to start | |
1442 | * | |
1443 | * Returns number of bytes read or error code, as appropriate | |
1444 | */ | |
1445 | static ssize_t smk_read_mapped(struct file *filp, char __user *buf, | |
1446 | size_t count, loff_t *ppos) | |
1447 | { | |
1448 | char temp[80]; | |
1449 | ssize_t rc; | |
1450 | ||
1451 | if (*ppos != 0) | |
1452 | return 0; | |
1453 | ||
1454 | sprintf(temp, "%d", smack_cipso_mapped); | |
1455 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1456 | ||
1457 | return rc; | |
1458 | } | |
1459 | ||
1460 | /** | |
1461 | * smk_write_mapped - write() for /smack/mapped | |
1462 | * @file: file pointer, not actually used | |
1463 | * @buf: where to get the data from | |
1464 | * @count: bytes sent | |
1465 | * @ppos: where to start | |
1466 | * | |
1467 | * Returns number of bytes written or error code, as appropriate | |
1468 | */ | |
1469 | static ssize_t smk_write_mapped(struct file *file, const char __user *buf, | |
1470 | size_t count, loff_t *ppos) | |
1471 | { | |
1472 | struct smack_known *skp; | |
1473 | char temp[80]; | |
1474 | int i; | |
1475 | ||
1880eff7 | 1476 | if (!smack_privileged(CAP_MAC_ADMIN)) |
f7112e6c CS |
1477 | return -EPERM; |
1478 | ||
1479 | if (count >= sizeof(temp) || count == 0) | |
1480 | return -EINVAL; | |
1481 | ||
1482 | if (copy_from_user(temp, buf, count) != 0) | |
1483 | return -EFAULT; | |
1484 | ||
1485 | temp[count] = '\0'; | |
1486 | ||
1487 | if (sscanf(temp, "%d", &i) != 1) | |
1488 | return -EINVAL; | |
1489 | ||
1490 | /* | |
1491 | * Don't do anything if the value hasn't actually changed. | |
1492 | * If it is changing reset the level on entries that were | |
1493 | * set up to be mapped when they were created. | |
1494 | */ | |
1495 | if (smack_cipso_mapped != i) { | |
1496 | mutex_lock(&smack_known_lock); | |
1497 | list_for_each_entry_rcu(skp, &smack_known_list, list) | |
1498 | if (skp->smk_netlabel.attr.mls.lvl == | |
1499 | smack_cipso_mapped) | |
1500 | skp->smk_netlabel.attr.mls.lvl = i; | |
1501 | smack_cipso_mapped = i; | |
1502 | mutex_unlock(&smack_known_lock); | |
1503 | } | |
1504 | ||
1505 | return count; | |
1506 | } | |
1507 | ||
1508 | static const struct file_operations smk_mapped_ops = { | |
1509 | .read = smk_read_mapped, | |
1510 | .write = smk_write_mapped, | |
1511 | .llseek = default_llseek, | |
1512 | }; | |
1513 | ||
e114e473 CS |
1514 | /** |
1515 | * smk_read_ambient - read() for /smack/ambient | |
1516 | * @filp: file pointer, not actually used | |
1517 | * @buf: where to put the result | |
1518 | * @cn: maximum to send along | |
1519 | * @ppos: where to start | |
1520 | * | |
1521 | * Returns number of bytes read or error code, as appropriate | |
1522 | */ | |
1523 | static ssize_t smk_read_ambient(struct file *filp, char __user *buf, | |
1524 | size_t cn, loff_t *ppos) | |
1525 | { | |
1526 | ssize_t rc; | |
e114e473 CS |
1527 | int asize; |
1528 | ||
1529 | if (*ppos != 0) | |
1530 | return 0; | |
1531 | /* | |
1532 | * Being careful to avoid a problem in the case where | |
1533 | * smack_net_ambient gets changed in midstream. | |
e114e473 | 1534 | */ |
4bc87e62 | 1535 | mutex_lock(&smack_ambient_lock); |
e114e473 | 1536 | |
2f823ff8 | 1537 | asize = strlen(smack_net_ambient->smk_known) + 1; |
4bc87e62 CS |
1538 | |
1539 | if (cn >= asize) | |
1540 | rc = simple_read_from_buffer(buf, cn, ppos, | |
2f823ff8 CS |
1541 | smack_net_ambient->smk_known, |
1542 | asize); | |
4bc87e62 CS |
1543 | else |
1544 | rc = -EINVAL; | |
e114e473 | 1545 | |
4bc87e62 | 1546 | mutex_unlock(&smack_ambient_lock); |
e114e473 CS |
1547 | |
1548 | return rc; | |
1549 | } | |
1550 | ||
1551 | /** | |
1552 | * smk_write_ambient - write() for /smack/ambient | |
251a2a95 | 1553 | * @file: file pointer, not actually used |
e114e473 CS |
1554 | * @buf: where to get the data from |
1555 | * @count: bytes sent | |
1556 | * @ppos: where to start | |
1557 | * | |
1558 | * Returns number of bytes written or error code, as appropriate | |
1559 | */ | |
1560 | static ssize_t smk_write_ambient(struct file *file, const char __user *buf, | |
1561 | size_t count, loff_t *ppos) | |
1562 | { | |
2f823ff8 | 1563 | struct smack_known *skp; |
4bc87e62 | 1564 | char *oldambient; |
f7112e6c CS |
1565 | char *data; |
1566 | int rc = count; | |
e114e473 | 1567 | |
1880eff7 | 1568 | if (!smack_privileged(CAP_MAC_ADMIN)) |
e114e473 CS |
1569 | return -EPERM; |
1570 | ||
f7112e6c CS |
1571 | data = kzalloc(count + 1, GFP_KERNEL); |
1572 | if (data == NULL) | |
1573 | return -ENOMEM; | |
e114e473 | 1574 | |
f7112e6c CS |
1575 | if (copy_from_user(data, buf, count) != 0) { |
1576 | rc = -EFAULT; | |
1577 | goto out; | |
1578 | } | |
e114e473 | 1579 | |
2f823ff8 CS |
1580 | skp = smk_import_entry(data, count); |
1581 | if (skp == NULL) { | |
f7112e6c CS |
1582 | rc = -EINVAL; |
1583 | goto out; | |
1584 | } | |
e114e473 | 1585 | |
4bc87e62 CS |
1586 | mutex_lock(&smack_ambient_lock); |
1587 | ||
2f823ff8 CS |
1588 | oldambient = smack_net_ambient->smk_known; |
1589 | smack_net_ambient = skp; | |
4bc87e62 CS |
1590 | smk_unlbl_ambient(oldambient); |
1591 | ||
1592 | mutex_unlock(&smack_ambient_lock); | |
e114e473 | 1593 | |
f7112e6c CS |
1594 | out: |
1595 | kfree(data); | |
1596 | return rc; | |
e114e473 CS |
1597 | } |
1598 | ||
1599 | static const struct file_operations smk_ambient_ops = { | |
1600 | .read = smk_read_ambient, | |
1601 | .write = smk_write_ambient, | |
6038f373 | 1602 | .llseek = default_llseek, |
e114e473 CS |
1603 | }; |
1604 | ||
15446235 CS |
1605 | /** |
1606 | * smk_read_onlycap - read() for /smack/onlycap | |
1607 | * @filp: file pointer, not actually used | |
1608 | * @buf: where to put the result | |
1609 | * @cn: maximum to send along | |
1610 | * @ppos: where to start | |
1611 | * | |
1612 | * Returns number of bytes read or error code, as appropriate | |
1613 | */ | |
1614 | static ssize_t smk_read_onlycap(struct file *filp, char __user *buf, | |
1615 | size_t cn, loff_t *ppos) | |
1616 | { | |
1617 | char *smack = ""; | |
1618 | ssize_t rc = -EINVAL; | |
1619 | int asize; | |
1620 | ||
1621 | if (*ppos != 0) | |
1622 | return 0; | |
1623 | ||
1624 | if (smack_onlycap != NULL) | |
1625 | smack = smack_onlycap; | |
1626 | ||
1627 | asize = strlen(smack) + 1; | |
1628 | ||
1629 | if (cn >= asize) | |
1630 | rc = simple_read_from_buffer(buf, cn, ppos, smack, asize); | |
1631 | ||
1632 | return rc; | |
1633 | } | |
1634 | ||
1635 | /** | |
1636 | * smk_write_onlycap - write() for /smack/onlycap | |
251a2a95 | 1637 | * @file: file pointer, not actually used |
15446235 CS |
1638 | * @buf: where to get the data from |
1639 | * @count: bytes sent | |
1640 | * @ppos: where to start | |
1641 | * | |
1642 | * Returns number of bytes written or error code, as appropriate | |
1643 | */ | |
1644 | static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, | |
1645 | size_t count, loff_t *ppos) | |
1646 | { | |
f7112e6c | 1647 | char *data; |
2f823ff8 | 1648 | struct smack_known *skp = smk_of_task(current->cred->security); |
f7112e6c | 1649 | int rc = count; |
15446235 | 1650 | |
1880eff7 | 1651 | if (!smack_privileged(CAP_MAC_ADMIN)) |
15446235 CS |
1652 | return -EPERM; |
1653 | ||
1654 | /* | |
1655 | * This can be done using smk_access() but is done | |
1656 | * explicitly for clarity. The smk_access() implementation | |
1657 | * would use smk_access(smack_onlycap, MAY_WRITE) | |
1658 | */ | |
2f823ff8 | 1659 | if (smack_onlycap != NULL && smack_onlycap != skp->smk_known) |
15446235 CS |
1660 | return -EPERM; |
1661 | ||
f7112e6c CS |
1662 | data = kzalloc(count, GFP_KERNEL); |
1663 | if (data == NULL) | |
1664 | return -ENOMEM; | |
15446235 CS |
1665 | |
1666 | /* | |
1667 | * Should the null string be passed in unset the onlycap value. | |
1668 | * This seems like something to be careful with as usually | |
1669 | * smk_import only expects to return NULL for errors. It | |
1670 | * is usually the case that a nullstring or "\n" would be | |
1671 | * bad to pass to smk_import but in fact this is useful here. | |
f7112e6c CS |
1672 | * |
1673 | * smk_import will also reject a label beginning with '-', | |
1674 | * so "-usecapabilities" will also work. | |
15446235 | 1675 | */ |
f7112e6c CS |
1676 | if (copy_from_user(data, buf, count) != 0) |
1677 | rc = -EFAULT; | |
1678 | else | |
1679 | smack_onlycap = smk_import(data, count); | |
15446235 | 1680 | |
f7112e6c CS |
1681 | kfree(data); |
1682 | return rc; | |
15446235 CS |
1683 | } |
1684 | ||
1685 | static const struct file_operations smk_onlycap_ops = { | |
1686 | .read = smk_read_onlycap, | |
1687 | .write = smk_write_onlycap, | |
6038f373 | 1688 | .llseek = default_llseek, |
15446235 CS |
1689 | }; |
1690 | ||
ecfcc53f EB |
1691 | /** |
1692 | * smk_read_logging - read() for /smack/logging | |
1693 | * @filp: file pointer, not actually used | |
1694 | * @buf: where to put the result | |
1695 | * @cn: maximum to send along | |
1696 | * @ppos: where to start | |
1697 | * | |
1698 | * Returns number of bytes read or error code, as appropriate | |
1699 | */ | |
1700 | static ssize_t smk_read_logging(struct file *filp, char __user *buf, | |
1701 | size_t count, loff_t *ppos) | |
1702 | { | |
1703 | char temp[32]; | |
1704 | ssize_t rc; | |
1705 | ||
1706 | if (*ppos != 0) | |
1707 | return 0; | |
1708 | ||
1709 | sprintf(temp, "%d\n", log_policy); | |
1710 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); | |
1711 | return rc; | |
1712 | } | |
1713 | ||
1714 | /** | |
1715 | * smk_write_logging - write() for /smack/logging | |
1716 | * @file: file pointer, not actually used | |
1717 | * @buf: where to get the data from | |
1718 | * @count: bytes sent | |
1719 | * @ppos: where to start | |
1720 | * | |
1721 | * Returns number of bytes written or error code, as appropriate | |
1722 | */ | |
1723 | static ssize_t smk_write_logging(struct file *file, const char __user *buf, | |
1724 | size_t count, loff_t *ppos) | |
1725 | { | |
1726 | char temp[32]; | |
1727 | int i; | |
1728 | ||
1880eff7 | 1729 | if (!smack_privileged(CAP_MAC_ADMIN)) |
ecfcc53f EB |
1730 | return -EPERM; |
1731 | ||
1732 | if (count >= sizeof(temp) || count == 0) | |
1733 | return -EINVAL; | |
1734 | ||
1735 | if (copy_from_user(temp, buf, count) != 0) | |
1736 | return -EFAULT; | |
1737 | ||
1738 | temp[count] = '\0'; | |
1739 | ||
1740 | if (sscanf(temp, "%d", &i) != 1) | |
1741 | return -EINVAL; | |
1742 | if (i < 0 || i > 3) | |
1743 | return -EINVAL; | |
1744 | log_policy = i; | |
1745 | return count; | |
1746 | } | |
1747 | ||
1748 | ||
1749 | ||
1750 | static const struct file_operations smk_logging_ops = { | |
1751 | .read = smk_read_logging, | |
1752 | .write = smk_write_logging, | |
6038f373 | 1753 | .llseek = default_llseek, |
ecfcc53f | 1754 | }; |
7898e1f8 CS |
1755 | |
1756 | /* | |
1757 | * Seq_file read operations for /smack/load-self | |
1758 | */ | |
1759 | ||
1760 | static void *load_self_seq_start(struct seq_file *s, loff_t *pos) | |
1761 | { | |
1762 | struct task_smack *tsp = current_security(); | |
1763 | ||
40809565 | 1764 | return smk_seq_start(s, pos, &tsp->smk_rules); |
7898e1f8 CS |
1765 | } |
1766 | ||
1767 | static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1768 | { | |
1769 | struct task_smack *tsp = current_security(); | |
7898e1f8 | 1770 | |
40809565 | 1771 | return smk_seq_next(s, v, pos, &tsp->smk_rules); |
7898e1f8 CS |
1772 | } |
1773 | ||
1774 | static int load_self_seq_show(struct seq_file *s, void *v) | |
1775 | { | |
1776 | struct list_head *list = v; | |
1777 | struct smack_rule *srp = | |
1778 | list_entry(list, struct smack_rule, list); | |
1779 | ||
f7112e6c | 1780 | smk_rule_show(s, srp, SMK_LABELLEN); |
7898e1f8 CS |
1781 | |
1782 | return 0; | |
1783 | } | |
1784 | ||
7898e1f8 CS |
1785 | static const struct seq_operations load_self_seq_ops = { |
1786 | .start = load_self_seq_start, | |
1787 | .next = load_self_seq_next, | |
1788 | .show = load_self_seq_show, | |
40809565 | 1789 | .stop = smk_seq_stop, |
7898e1f8 CS |
1790 | }; |
1791 | ||
1792 | ||
1793 | /** | |
f7112e6c | 1794 | * smk_open_load_self - open() for /smack/load-self2 |
7898e1f8 CS |
1795 | * @inode: inode structure representing file |
1796 | * @file: "load" file pointer | |
1797 | * | |
1798 | * For reading, use load_seq_* seq_file reading operations. | |
1799 | */ | |
1800 | static int smk_open_load_self(struct inode *inode, struct file *file) | |
1801 | { | |
1802 | return seq_open(file, &load_self_seq_ops); | |
1803 | } | |
1804 | ||
1805 | /** | |
1806 | * smk_write_load_self - write() for /smack/load-self | |
1807 | * @file: file pointer, not actually used | |
1808 | * @buf: where to get the data from | |
1809 | * @count: bytes sent | |
1810 | * @ppos: where to start - must be 0 | |
1811 | * | |
1812 | */ | |
1813 | static ssize_t smk_write_load_self(struct file *file, const char __user *buf, | |
1814 | size_t count, loff_t *ppos) | |
1815 | { | |
1816 | struct task_smack *tsp = current_security(); | |
1817 | ||
f7112e6c CS |
1818 | return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules, |
1819 | &tsp->smk_rules_lock, SMK_FIXED24_FMT); | |
7898e1f8 CS |
1820 | } |
1821 | ||
1822 | static const struct file_operations smk_load_self_ops = { | |
1823 | .open = smk_open_load_self, | |
1824 | .read = seq_read, | |
1825 | .llseek = seq_lseek, | |
1826 | .write = smk_write_load_self, | |
1827 | .release = seq_release, | |
1828 | }; | |
828716c2 JS |
1829 | |
1830 | /** | |
f7112e6c | 1831 | * smk_user_access - handle access check transaction |
828716c2 JS |
1832 | * @file: file pointer |
1833 | * @buf: data from user space | |
1834 | * @count: bytes sent | |
1835 | * @ppos: where to start - must be 0 | |
1836 | */ | |
f7112e6c CS |
1837 | static ssize_t smk_user_access(struct file *file, const char __user *buf, |
1838 | size_t count, loff_t *ppos, int format) | |
828716c2 | 1839 | { |
e05b6f98 | 1840 | struct smack_parsed_rule rule; |
828716c2 | 1841 | char *data; |
f8859d98 | 1842 | int res; |
828716c2 | 1843 | |
828716c2 JS |
1844 | data = simple_transaction_get(file, buf, count); |
1845 | if (IS_ERR(data)) | |
1846 | return PTR_ERR(data); | |
1847 | ||
f7112e6c CS |
1848 | if (format == SMK_FIXED24_FMT) { |
1849 | if (count < SMK_LOADLEN) | |
1850 | return -EINVAL; | |
1851 | res = smk_parse_rule(data, &rule, 0); | |
1852 | } else { | |
1853 | /* | |
10289b0f | 1854 | * simple_transaction_get() returns null-terminated data |
f7112e6c | 1855 | */ |
10289b0f | 1856 | res = smk_parse_long_rule(data, &rule, 0, 3); |
f7112e6c CS |
1857 | } |
1858 | ||
10289b0f | 1859 | if (res < 0) |
828716c2 JS |
1860 | return -EINVAL; |
1861 | ||
2f823ff8 CS |
1862 | res = smk_access(rule.smk_subject, rule.smk_object, |
1863 | rule.smk_access1, NULL); | |
f8859d98 JS |
1864 | data[0] = res == 0 ? '1' : '0'; |
1865 | data[1] = '\0'; | |
828716c2 | 1866 | |
d86b2b61 | 1867 | simple_transaction_set(file, 2); |
f7112e6c CS |
1868 | |
1869 | if (format == SMK_FIXED24_FMT) | |
1870 | return SMK_LOADLEN; | |
1871 | return count; | |
1872 | } | |
1873 | ||
1874 | /** | |
1875 | * smk_write_access - handle access check transaction | |
1876 | * @file: file pointer | |
1877 | * @buf: data from user space | |
1878 | * @count: bytes sent | |
1879 | * @ppos: where to start - must be 0 | |
1880 | */ | |
1881 | static ssize_t smk_write_access(struct file *file, const char __user *buf, | |
1882 | size_t count, loff_t *ppos) | |
1883 | { | |
1884 | return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT); | |
828716c2 JS |
1885 | } |
1886 | ||
1887 | static const struct file_operations smk_access_ops = { | |
1888 | .write = smk_write_access, | |
1889 | .read = simple_transaction_read, | |
1890 | .release = simple_transaction_release, | |
1891 | .llseek = generic_file_llseek, | |
1892 | }; | |
1893 | ||
f7112e6c CS |
1894 | |
1895 | /* | |
1896 | * Seq_file read operations for /smack/load2 | |
1897 | */ | |
1898 | ||
1899 | static int load2_seq_show(struct seq_file *s, void *v) | |
1900 | { | |
1901 | struct list_head *list = v; | |
1902 | struct smack_master_list *smlp = | |
1903 | list_entry(list, struct smack_master_list, list); | |
1904 | ||
1905 | smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL); | |
1906 | ||
1907 | return 0; | |
1908 | } | |
1909 | ||
1910 | static const struct seq_operations load2_seq_ops = { | |
1911 | .start = load2_seq_start, | |
1912 | .next = load2_seq_next, | |
1913 | .show = load2_seq_show, | |
1914 | .stop = smk_seq_stop, | |
1915 | }; | |
1916 | ||
1917 | /** | |
1918 | * smk_open_load2 - open() for /smack/load2 | |
1919 | * @inode: inode structure representing file | |
1920 | * @file: "load2" file pointer | |
1921 | * | |
1922 | * For reading, use load2_seq_* seq_file reading operations. | |
1923 | */ | |
1924 | static int smk_open_load2(struct inode *inode, struct file *file) | |
1925 | { | |
1926 | return seq_open(file, &load2_seq_ops); | |
1927 | } | |
1928 | ||
1929 | /** | |
1930 | * smk_write_load2 - write() for /smack/load2 | |
1931 | * @file: file pointer, not actually used | |
1932 | * @buf: where to get the data from | |
1933 | * @count: bytes sent | |
1934 | * @ppos: where to start - must be 0 | |
1935 | * | |
1936 | */ | |
1937 | static ssize_t smk_write_load2(struct file *file, const char __user *buf, | |
1938 | size_t count, loff_t *ppos) | |
1939 | { | |
1940 | /* | |
1941 | * Must have privilege. | |
1942 | */ | |
1880eff7 | 1943 | if (!smack_privileged(CAP_MAC_ADMIN)) |
f7112e6c CS |
1944 | return -EPERM; |
1945 | ||
1946 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, | |
1947 | SMK_LONG_FMT); | |
1948 | } | |
1949 | ||
1950 | static const struct file_operations smk_load2_ops = { | |
1951 | .open = smk_open_load2, | |
1952 | .read = seq_read, | |
1953 | .llseek = seq_lseek, | |
1954 | .write = smk_write_load2, | |
1955 | .release = seq_release, | |
1956 | }; | |
1957 | ||
1958 | /* | |
1959 | * Seq_file read operations for /smack/load-self2 | |
1960 | */ | |
1961 | ||
1962 | static void *load_self2_seq_start(struct seq_file *s, loff_t *pos) | |
1963 | { | |
1964 | struct task_smack *tsp = current_security(); | |
1965 | ||
1966 | return smk_seq_start(s, pos, &tsp->smk_rules); | |
1967 | } | |
1968 | ||
1969 | static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1970 | { | |
1971 | struct task_smack *tsp = current_security(); | |
1972 | ||
1973 | return smk_seq_next(s, v, pos, &tsp->smk_rules); | |
1974 | } | |
1975 | ||
1976 | static int load_self2_seq_show(struct seq_file *s, void *v) | |
1977 | { | |
1978 | struct list_head *list = v; | |
1979 | struct smack_rule *srp = | |
1980 | list_entry(list, struct smack_rule, list); | |
1981 | ||
1982 | smk_rule_show(s, srp, SMK_LONGLABEL); | |
1983 | ||
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | static const struct seq_operations load_self2_seq_ops = { | |
1988 | .start = load_self2_seq_start, | |
1989 | .next = load_self2_seq_next, | |
1990 | .show = load_self2_seq_show, | |
1991 | .stop = smk_seq_stop, | |
1992 | }; | |
1993 | ||
1994 | /** | |
1995 | * smk_open_load_self2 - open() for /smack/load-self2 | |
1996 | * @inode: inode structure representing file | |
1997 | * @file: "load" file pointer | |
1998 | * | |
1999 | * For reading, use load_seq_* seq_file reading operations. | |
2000 | */ | |
2001 | static int smk_open_load_self2(struct inode *inode, struct file *file) | |
2002 | { | |
2003 | return seq_open(file, &load_self2_seq_ops); | |
2004 | } | |
2005 | ||
2006 | /** | |
2007 | * smk_write_load_self2 - write() for /smack/load-self2 | |
2008 | * @file: file pointer, not actually used | |
2009 | * @buf: where to get the data from | |
2010 | * @count: bytes sent | |
2011 | * @ppos: where to start - must be 0 | |
2012 | * | |
2013 | */ | |
2014 | static ssize_t smk_write_load_self2(struct file *file, const char __user *buf, | |
2015 | size_t count, loff_t *ppos) | |
2016 | { | |
2017 | struct task_smack *tsp = current_security(); | |
2018 | ||
2019 | return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules, | |
2020 | &tsp->smk_rules_lock, SMK_LONG_FMT); | |
2021 | } | |
2022 | ||
2023 | static const struct file_operations smk_load_self2_ops = { | |
2024 | .open = smk_open_load_self2, | |
2025 | .read = seq_read, | |
2026 | .llseek = seq_lseek, | |
2027 | .write = smk_write_load_self2, | |
2028 | .release = seq_release, | |
2029 | }; | |
2030 | ||
2031 | /** | |
2032 | * smk_write_access2 - handle access check transaction | |
2033 | * @file: file pointer | |
2034 | * @buf: data from user space | |
2035 | * @count: bytes sent | |
2036 | * @ppos: where to start - must be 0 | |
2037 | */ | |
2038 | static ssize_t smk_write_access2(struct file *file, const char __user *buf, | |
2039 | size_t count, loff_t *ppos) | |
2040 | { | |
2041 | return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT); | |
2042 | } | |
2043 | ||
2044 | static const struct file_operations smk_access2_ops = { | |
2045 | .write = smk_write_access2, | |
2046 | .read = simple_transaction_read, | |
2047 | .release = simple_transaction_release, | |
2048 | .llseek = generic_file_llseek, | |
2049 | }; | |
2050 | ||
449543b0 RK |
2051 | /** |
2052 | * smk_write_revoke_subj - write() for /smack/revoke-subject | |
2053 | * @file: file pointer | |
2054 | * @buf: data from user space | |
2055 | * @count: bytes sent | |
2056 | * @ppos: where to start - must be 0 | |
2057 | */ | |
2058 | static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf, | |
2059 | size_t count, loff_t *ppos) | |
2060 | { | |
2061 | char *data = NULL; | |
2062 | const char *cp = NULL; | |
2063 | struct smack_known *skp; | |
2064 | struct smack_rule *sp; | |
2065 | struct list_head *rule_list; | |
2066 | struct mutex *rule_lock; | |
2067 | int rc = count; | |
2068 | ||
2069 | if (*ppos != 0) | |
2070 | return -EINVAL; | |
2071 | ||
2072 | if (!smack_privileged(CAP_MAC_ADMIN)) | |
2073 | return -EPERM; | |
2074 | ||
2075 | if (count == 0 || count > SMK_LONGLABEL) | |
2076 | return -EINVAL; | |
2077 | ||
2078 | data = kzalloc(count, GFP_KERNEL); | |
2079 | if (data == NULL) | |
2080 | return -ENOMEM; | |
2081 | ||
2082 | if (copy_from_user(data, buf, count) != 0) { | |
2083 | rc = -EFAULT; | |
2084 | goto free_out; | |
2085 | } | |
2086 | ||
2087 | cp = smk_parse_smack(data, count); | |
2088 | if (cp == NULL) { | |
2089 | rc = -EINVAL; | |
2090 | goto free_out; | |
2091 | } | |
2092 | ||
2093 | skp = smk_find_entry(cp); | |
d15d9fad | 2094 | if (skp == NULL) |
449543b0 | 2095 | goto free_out; |
449543b0 RK |
2096 | |
2097 | rule_list = &skp->smk_rules; | |
2098 | rule_lock = &skp->smk_rules_lock; | |
2099 | ||
2100 | mutex_lock(rule_lock); | |
2101 | ||
2102 | list_for_each_entry_rcu(sp, rule_list, list) | |
2103 | sp->smk_access = 0; | |
2104 | ||
2105 | mutex_unlock(rule_lock); | |
2106 | ||
2107 | free_out: | |
2108 | kfree(data); | |
2109 | kfree(cp); | |
2110 | return rc; | |
2111 | } | |
2112 | ||
2113 | static const struct file_operations smk_revoke_subj_ops = { | |
2114 | .write = smk_write_revoke_subj, | |
2115 | .read = simple_transaction_read, | |
2116 | .release = simple_transaction_release, | |
2117 | .llseek = generic_file_llseek, | |
2118 | }; | |
2119 | ||
e9307237 CS |
2120 | static struct kset *smackfs_kset; |
2121 | /** | |
2122 | * smk_init_sysfs - initialize /sys/fs/smackfs | |
2123 | * | |
2124 | */ | |
2125 | static int smk_init_sysfs(void) | |
2126 | { | |
2127 | smackfs_kset = kset_create_and_add("smackfs", NULL, fs_kobj); | |
2128 | if (!smackfs_kset) | |
2129 | return -ENOMEM; | |
2130 | return 0; | |
2131 | } | |
2132 | ||
e05b6f98 RK |
2133 | /** |
2134 | * smk_write_change_rule - write() for /smack/change-rule | |
2135 | * @file: file pointer | |
2136 | * @buf: data from user space | |
2137 | * @count: bytes sent | |
2138 | * @ppos: where to start - must be 0 | |
2139 | */ | |
2140 | static ssize_t smk_write_change_rule(struct file *file, const char __user *buf, | |
2141 | size_t count, loff_t *ppos) | |
2142 | { | |
2143 | /* | |
2144 | * Must have privilege. | |
2145 | */ | |
2146 | if (!capable(CAP_MAC_ADMIN)) | |
2147 | return -EPERM; | |
2148 | ||
2149 | return smk_write_rules_list(file, buf, count, ppos, NULL, NULL, | |
2150 | SMK_CHANGE_FMT); | |
2151 | } | |
2152 | ||
2153 | static const struct file_operations smk_change_rule_ops = { | |
2154 | .write = smk_write_change_rule, | |
2155 | .read = simple_transaction_read, | |
2156 | .release = simple_transaction_release, | |
2157 | .llseek = generic_file_llseek, | |
2158 | }; | |
2159 | ||
e114e473 CS |
2160 | /** |
2161 | * smk_fill_super - fill the /smackfs superblock | |
2162 | * @sb: the empty superblock | |
2163 | * @data: unused | |
2164 | * @silent: unused | |
2165 | * | |
2166 | * Fill in the well known entries for /smack | |
2167 | * | |
2168 | * Returns 0 on success, an error code on failure | |
2169 | */ | |
2170 | static int smk_fill_super(struct super_block *sb, void *data, int silent) | |
2171 | { | |
2172 | int rc; | |
2173 | struct inode *root_inode; | |
2174 | ||
2175 | static struct tree_descr smack_files[] = { | |
7898e1f8 CS |
2176 | [SMK_LOAD] = { |
2177 | "load", &smk_load_ops, S_IRUGO|S_IWUSR}, | |
2178 | [SMK_CIPSO] = { | |
2179 | "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR}, | |
2180 | [SMK_DOI] = { | |
2181 | "doi", &smk_doi_ops, S_IRUGO|S_IWUSR}, | |
2182 | [SMK_DIRECT] = { | |
2183 | "direct", &smk_direct_ops, S_IRUGO|S_IWUSR}, | |
2184 | [SMK_AMBIENT] = { | |
2185 | "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR}, | |
2186 | [SMK_NETLBLADDR] = { | |
2187 | "netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR}, | |
2188 | [SMK_ONLYCAP] = { | |
2189 | "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR}, | |
2190 | [SMK_LOGGING] = { | |
2191 | "logging", &smk_logging_ops, S_IRUGO|S_IWUSR}, | |
2192 | [SMK_LOAD_SELF] = { | |
2193 | "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO}, | |
828716c2 | 2194 | [SMK_ACCESSES] = { |
0e94ae17 | 2195 | "access", &smk_access_ops, S_IRUGO|S_IWUGO}, |
f7112e6c CS |
2196 | [SMK_MAPPED] = { |
2197 | "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR}, | |
2198 | [SMK_LOAD2] = { | |
2199 | "load2", &smk_load2_ops, S_IRUGO|S_IWUSR}, | |
2200 | [SMK_LOAD_SELF2] = { | |
2201 | "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO}, | |
2202 | [SMK_ACCESS2] = { | |
2203 | "access2", &smk_access2_ops, S_IRUGO|S_IWUGO}, | |
2204 | [SMK_CIPSO2] = { | |
2205 | "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR}, | |
449543b0 RK |
2206 | [SMK_REVOKE_SUBJ] = { |
2207 | "revoke-subject", &smk_revoke_subj_ops, | |
2208 | S_IRUGO|S_IWUSR}, | |
e05b6f98 RK |
2209 | [SMK_CHANGE_RULE] = { |
2210 | "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR}, | |
7898e1f8 CS |
2211 | /* last one */ |
2212 | {""} | |
e114e473 CS |
2213 | }; |
2214 | ||
2215 | rc = simple_fill_super(sb, SMACK_MAGIC, smack_files); | |
2216 | if (rc != 0) { | |
2217 | printk(KERN_ERR "%s failed %d while creating inodes\n", | |
2218 | __func__, rc); | |
2219 | return rc; | |
2220 | } | |
2221 | ||
2222 | root_inode = sb->s_root->d_inode; | |
e114e473 CS |
2223 | |
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | /** | |
fc14f2fe | 2228 | * smk_mount - get the smackfs superblock |
e114e473 CS |
2229 | * @fs_type: passed along without comment |
2230 | * @flags: passed along without comment | |
2231 | * @dev_name: passed along without comment | |
2232 | * @data: passed along without comment | |
e114e473 CS |
2233 | * |
2234 | * Just passes everything along. | |
2235 | * | |
2236 | * Returns what the lower level code does. | |
2237 | */ | |
fc14f2fe AV |
2238 | static struct dentry *smk_mount(struct file_system_type *fs_type, |
2239 | int flags, const char *dev_name, void *data) | |
e114e473 | 2240 | { |
fc14f2fe | 2241 | return mount_single(fs_type, flags, data, smk_fill_super); |
e114e473 CS |
2242 | } |
2243 | ||
2244 | static struct file_system_type smk_fs_type = { | |
2245 | .name = "smackfs", | |
fc14f2fe | 2246 | .mount = smk_mount, |
e114e473 CS |
2247 | .kill_sb = kill_litter_super, |
2248 | }; | |
2249 | ||
2250 | static struct vfsmount *smackfs_mount; | |
2251 | ||
f7112e6c CS |
2252 | static int __init smk_preset_netlabel(struct smack_known *skp) |
2253 | { | |
2254 | skp->smk_netlabel.domain = skp->smk_known; | |
2255 | skp->smk_netlabel.flags = | |
2256 | NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL; | |
2257 | return smk_netlbl_mls(smack_cipso_direct, skp->smk_known, | |
2258 | &skp->smk_netlabel, strlen(skp->smk_known)); | |
2259 | } | |
2260 | ||
e114e473 CS |
2261 | /** |
2262 | * init_smk_fs - get the smackfs superblock | |
2263 | * | |
2264 | * register the smackfs | |
2265 | * | |
076c54c5 AD |
2266 | * Do not register smackfs if Smack wasn't enabled |
2267 | * on boot. We can not put this method normally under the | |
2268 | * smack_init() code path since the security subsystem get | |
2269 | * initialized before the vfs caches. | |
2270 | * | |
2271 | * Returns true if we were not chosen on boot or if | |
2272 | * we were chosen and filesystem registration succeeded. | |
e114e473 CS |
2273 | */ |
2274 | static int __init init_smk_fs(void) | |
2275 | { | |
2276 | int err; | |
f7112e6c | 2277 | int rc; |
e114e473 | 2278 | |
076c54c5 AD |
2279 | if (!security_module_enable(&smack_ops)) |
2280 | return 0; | |
2281 | ||
e9307237 CS |
2282 | err = smk_init_sysfs(); |
2283 | if (err) | |
2284 | printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n"); | |
2285 | ||
e114e473 CS |
2286 | err = register_filesystem(&smk_fs_type); |
2287 | if (!err) { | |
2288 | smackfs_mount = kern_mount(&smk_fs_type); | |
2289 | if (IS_ERR(smackfs_mount)) { | |
2290 | printk(KERN_ERR "smackfs: could not mount!\n"); | |
2291 | err = PTR_ERR(smackfs_mount); | |
2292 | smackfs_mount = NULL; | |
2293 | } | |
2294 | } | |
2295 | ||
e114e473 | 2296 | smk_cipso_doi(); |
4bc87e62 | 2297 | smk_unlbl_ambient(NULL); |
e114e473 | 2298 | |
f7112e6c CS |
2299 | rc = smk_preset_netlabel(&smack_known_floor); |
2300 | if (err == 0 && rc < 0) | |
2301 | err = rc; | |
2302 | rc = smk_preset_netlabel(&smack_known_hat); | |
2303 | if (err == 0 && rc < 0) | |
2304 | err = rc; | |
2305 | rc = smk_preset_netlabel(&smack_known_huh); | |
2306 | if (err == 0 && rc < 0) | |
2307 | err = rc; | |
2308 | rc = smk_preset_netlabel(&smack_known_invalid); | |
2309 | if (err == 0 && rc < 0) | |
2310 | err = rc; | |
2311 | rc = smk_preset_netlabel(&smack_known_star); | |
2312 | if (err == 0 && rc < 0) | |
2313 | err = rc; | |
2314 | rc = smk_preset_netlabel(&smack_known_web); | |
2315 | if (err == 0 && rc < 0) | |
2316 | err = rc; | |
2317 | ||
e114e473 CS |
2318 | return err; |
2319 | } | |
2320 | ||
2321 | __initcall(init_smk_fs); |