blob: 3045a964f39c82152574ef4479e01a0254c88f5a [file] [log] [blame]
Paul Moored15c3452006-08-03 16:48:37 -07001/*
2 * NetLabel Kernel API
3 *
4 * This file defines the kernel API for the NetLabel system. The NetLabel
5 * system manages static and dynamic label mappings for network protocols such
6 * as CIPSO and RIPSO.
7 *
Paul Moore82c21bf2011-08-01 11:10:33 +00008 * Author: Paul Moore <paul@paul-moore.com>
Paul Moored15c3452006-08-03 16:48:37 -07009 *
10 */
11
12/*
Paul Moore014ab192008-10-10 10:16:33 -040013 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
Paul Moored15c3452006-08-03 16:48:37 -070014 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
23 * the GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
Jeff Kirsherd484ff12013-12-06 09:13:41 -080026 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Paul Moored15c3452006-08-03 16:48:37 -070027 *
28 */
29
30#include <linux/init.h>
31#include <linux/types.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/slab.h>
Paul Mooreeda61d32008-02-04 22:29:47 -080033#include <linux/audit.h>
Paul Moore6c2e8ac2008-12-31 12:54:11 -050034#include <linux/in.h>
35#include <linux/in6.h>
Paul Moored15c3452006-08-03 16:48:37 -070036#include <net/ip.h>
Paul Moore6c2e8ac2008-12-31 12:54:11 -050037#include <net/ipv6.h>
Paul Moored15c3452006-08-03 16:48:37 -070038#include <net/netlabel.h>
39#include <net/cipso_ipv4.h>
40#include <asm/bug.h>
Arun Sharma600634972011-07-26 16:09:06 -070041#include <linux/atomic.h>
Paul Moored15c3452006-08-03 16:48:37 -070042
43#include "netlabel_domainhash.h"
44#include "netlabel_unlabeled.h"
Paul Mooreeda61d32008-02-04 22:29:47 -080045#include "netlabel_cipso_v4.h"
Paul Moored15c3452006-08-03 16:48:37 -070046#include "netlabel_user.h"
Paul Moore23bcdc12007-07-18 12:28:45 -040047#include "netlabel_mgmt.h"
Paul Moore6c2e8ac2008-12-31 12:54:11 -050048#include "netlabel_addrlist.h"
Paul Moored15c3452006-08-03 16:48:37 -070049
50/*
Paul Mooreeda61d32008-02-04 22:29:47 -080051 * Configuration Functions
52 */
53
54/**
55 * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
56 * @domain: the domain mapping to remove
Paul Moore6c2e8ac2008-12-31 12:54:11 -050057 * @family: address family
58 * @addr: IP address
59 * @mask: IP address mask
Paul Mooreeda61d32008-02-04 22:29:47 -080060 * @audit_info: NetLabel audit information
61 *
62 * Description:
63 * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the
64 * default domain mapping to be removed. Returns zero on success, negative
65 * values on failure.
66 *
67 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -050068int netlbl_cfg_map_del(const char *domain,
69 u16 family,
70 const void *addr,
71 const void *mask,
72 struct netlbl_audit *audit_info)
Paul Mooreeda61d32008-02-04 22:29:47 -080073{
Paul Moore6c2e8ac2008-12-31 12:54:11 -050074 if (addr == NULL && mask == NULL) {
75 return netlbl_domhsh_remove(domain, audit_info);
76 } else if (addr != NULL && mask != NULL) {
77 switch (family) {
78 case AF_INET:
79 return netlbl_domhsh_remove_af4(domain, addr, mask,
80 audit_info);
81 default:
82 return -EPFNOSUPPORT;
83 }
84 } else
85 return -EINVAL;
Paul Mooreeda61d32008-02-04 22:29:47 -080086}
87
88/**
Paul Moore6c2e8ac2008-12-31 12:54:11 -050089 * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
Paul Mooreeda61d32008-02-04 22:29:47 -080090 * @domain: the domain mapping to add
Paul Moore6c2e8ac2008-12-31 12:54:11 -050091 * @family: address family
92 * @addr: IP address
93 * @mask: IP address mask
Paul Mooreeda61d32008-02-04 22:29:47 -080094 * @audit_info: NetLabel audit information
95 *
96 * Description:
97 * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL
98 * causes a new default domain mapping to be added. Returns zero on success,
99 * negative values on failure.
100 *
101 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500102int netlbl_cfg_unlbl_map_add(const char *domain,
103 u16 family,
104 const void *addr,
105 const void *mask,
Paul Mooreeda61d32008-02-04 22:29:47 -0800106 struct netlbl_audit *audit_info)
107{
108 int ret_val = -ENOMEM;
109 struct netlbl_dom_map *entry;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500110 struct netlbl_domaddr_map *addrmap = NULL;
111 struct netlbl_domaddr4_map *map4 = NULL;
112 struct netlbl_domaddr6_map *map6 = NULL;
Paul Mooreeda61d32008-02-04 22:29:47 -0800113
114 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
115 if (entry == NULL)
Paul Moore948a7242008-10-10 10:16:30 -0400116 return -ENOMEM;
Paul Mooreeda61d32008-02-04 22:29:47 -0800117 if (domain != NULL) {
118 entry->domain = kstrdup(domain, GFP_ATOMIC);
119 if (entry->domain == NULL)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500120 goto cfg_unlbl_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800121 }
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500122
123 if (addr == NULL && mask == NULL)
Paul Moore6a8b7f02013-08-02 14:45:08 -0400124 entry->def.type = NETLBL_NLTYPE_UNLABELED;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500125 else if (addr != NULL && mask != NULL) {
126 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
127 if (addrmap == NULL)
128 goto cfg_unlbl_map_add_failure;
129 INIT_LIST_HEAD(&addrmap->list4);
130 INIT_LIST_HEAD(&addrmap->list6);
131
132 switch (family) {
Paul Moore1281bc22011-11-29 10:10:54 +0000133 case AF_INET: {
134 const struct in_addr *addr4 = addr;
135 const struct in_addr *mask4 = mask;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500136 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
137 if (map4 == NULL)
138 goto cfg_unlbl_map_add_failure;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400139 map4->def.type = NETLBL_NLTYPE_UNLABELED;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500140 map4->list.addr = addr4->s_addr & mask4->s_addr;
141 map4->list.mask = mask4->s_addr;
142 map4->list.valid = 1;
143 ret_val = netlbl_af4list_add(&map4->list,
144 &addrmap->list4);
145 if (ret_val != 0)
146 goto cfg_unlbl_map_add_failure;
147 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000148 }
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000149#if IS_ENABLED(CONFIG_IPV6)
Paul Moore1281bc22011-11-29 10:10:54 +0000150 case AF_INET6: {
151 const struct in6_addr *addr6 = addr;
152 const struct in6_addr *mask6 = mask;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500153 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
Julia Lawallca7daea2009-07-30 04:38:19 +0000154 if (map6 == NULL)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500155 goto cfg_unlbl_map_add_failure;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400156 map6->def.type = NETLBL_NLTYPE_UNLABELED;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000157 map6->list.addr = *addr6;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500158 map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
159 map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
160 map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
161 map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000162 map6->list.mask = *mask6;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500163 map6->list.valid = 1;
Dan Carpenter42ca0202011-11-23 21:18:20 +0000164 ret_val = netlbl_af6list_add(&map6->list,
165 &addrmap->list6);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500166 if (ret_val != 0)
167 goto cfg_unlbl_map_add_failure;
168 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000169 }
170#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500171 default:
172 goto cfg_unlbl_map_add_failure;
173 break;
174 }
175
Paul Moore6a8b7f02013-08-02 14:45:08 -0400176 entry->def.addrsel = addrmap;
177 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500178 } else {
179 ret_val = -EINVAL;
180 goto cfg_unlbl_map_add_failure;
181 }
Paul Mooreeda61d32008-02-04 22:29:47 -0800182
183 ret_val = netlbl_domhsh_add(entry, audit_info);
184 if (ret_val != 0)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500185 goto cfg_unlbl_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800186
187 return 0;
188
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500189cfg_unlbl_map_add_failure:
Julia Lawall47943232009-07-27 06:15:43 +0000190 kfree(entry->domain);
Paul Mooreeda61d32008-02-04 22:29:47 -0800191 kfree(entry);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500192 kfree(addrmap);
193 kfree(map4);
194 kfree(map6);
Paul Mooreeda61d32008-02-04 22:29:47 -0800195 return ret_val;
196}
197
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500198
Paul Mooreeda61d32008-02-04 22:29:47 -0800199/**
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500200 * netlbl_cfg_unlbl_static_add - Adds a new static label
201 * @net: network namespace
202 * @dev_name: interface name
203 * @addr: IP address in network byte order (struct in[6]_addr)
204 * @mask: address mask in network byte order (struct in[6]_addr)
205 * @family: address family
206 * @secid: LSM secid value for the entry
Paul Mooreeda61d32008-02-04 22:29:47 -0800207 * @audit_info: NetLabel audit information
208 *
209 * Description:
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500210 * Adds a new NetLabel static label to be used when protocol provided labels
211 * are not present on incoming traffic. If @dev_name is NULL then the default
212 * interface will be used. Returns zero on success, negative values on failure.
Paul Mooreeda61d32008-02-04 22:29:47 -0800213 *
214 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500215int netlbl_cfg_unlbl_static_add(struct net *net,
216 const char *dev_name,
217 const void *addr,
218 const void *mask,
219 u16 family,
220 u32 secid,
221 struct netlbl_audit *audit_info)
222{
223 u32 addr_len;
224
225 switch (family) {
226 case AF_INET:
227 addr_len = sizeof(struct in_addr);
228 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000229#if IS_ENABLED(CONFIG_IPV6)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500230 case AF_INET6:
231 addr_len = sizeof(struct in6_addr);
232 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000233#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500234 default:
235 return -EPFNOSUPPORT;
236 }
237
238 return netlbl_unlhsh_add(net,
239 dev_name, addr, mask, addr_len,
240 secid, audit_info);
241}
242
243/**
244 * netlbl_cfg_unlbl_static_del - Removes an existing static label
245 * @net: network namespace
246 * @dev_name: interface name
247 * @addr: IP address in network byte order (struct in[6]_addr)
248 * @mask: address mask in network byte order (struct in[6]_addr)
249 * @family: address family
250 * @secid: LSM secid value for the entry
251 * @audit_info: NetLabel audit information
252 *
253 * Description:
254 * Removes an existing NetLabel static label used when protocol provided labels
255 * are not present on incoming traffic. If @dev_name is NULL then the default
256 * interface will be used. Returns zero on success, negative values on failure.
257 *
258 */
259int netlbl_cfg_unlbl_static_del(struct net *net,
260 const char *dev_name,
261 const void *addr,
262 const void *mask,
263 u16 family,
264 struct netlbl_audit *audit_info)
265{
266 u32 addr_len;
267
268 switch (family) {
269 case AF_INET:
270 addr_len = sizeof(struct in_addr);
271 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000272#if IS_ENABLED(CONFIG_IPV6)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500273 case AF_INET6:
274 addr_len = sizeof(struct in6_addr);
275 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000276#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500277 default:
278 return -EPFNOSUPPORT;
279 }
280
281 return netlbl_unlhsh_remove(net,
282 dev_name, addr, mask, addr_len,
283 audit_info);
284}
285
286/**
287 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
288 * @doi_def: CIPSO DOI definition
289 * @audit_info: NetLabel audit information
290 *
291 * Description:
292 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
293 * success and negative values on failure.
294 *
295 */
296int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
297 struct netlbl_audit *audit_info)
298{
299 return cipso_v4_doi_add(doi_def, audit_info);
300}
301
302/**
303 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
304 * @doi: CIPSO DOI
305 * @audit_info: NetLabel audit information
306 *
307 * Description:
308 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
309 * success and negative values on failure.
310 *
311 */
312void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
313{
314 cipso_v4_doi_remove(doi, audit_info);
315}
316
317/**
318 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
319 * @doi: the CIPSO DOI
320 * @domain: the domain mapping to add
321 * @addr: IP address
322 * @mask: IP address mask
323 * @audit_info: NetLabel audit information
324 *
325 * Description:
326 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
327 * subsystem. A @domain value of NULL adds a new default domain mapping.
328 * Returns zero on success, negative values on failure.
329 *
330 */
331int netlbl_cfg_cipsov4_map_add(u32 doi,
Paul Mooreeda61d32008-02-04 22:29:47 -0800332 const char *domain,
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500333 const struct in_addr *addr,
334 const struct in_addr *mask,
Paul Mooreeda61d32008-02-04 22:29:47 -0800335 struct netlbl_audit *audit_info)
336{
337 int ret_val = -ENOMEM;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500338 struct cipso_v4_doi *doi_def;
Paul Mooreeda61d32008-02-04 22:29:47 -0800339 struct netlbl_dom_map *entry;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500340 struct netlbl_domaddr_map *addrmap = NULL;
341 struct netlbl_domaddr4_map *addrinfo = NULL;
Paul Mooreeda61d32008-02-04 22:29:47 -0800342
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500343 doi_def = cipso_v4_doi_getdef(doi);
344 if (doi_def == NULL)
345 return -ENOENT;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400346
Paul Mooreeda61d32008-02-04 22:29:47 -0800347 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
348 if (entry == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000349 goto out_entry;
Paul Mooreeda61d32008-02-04 22:29:47 -0800350 if (domain != NULL) {
351 entry->domain = kstrdup(domain, GFP_ATOMIC);
352 if (entry->domain == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000353 goto out_domain;
Paul Mooreeda61d32008-02-04 22:29:47 -0800354 }
Paul Mooreeda61d32008-02-04 22:29:47 -0800355
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500356 if (addr == NULL && mask == NULL) {
Paul Moore6a8b7f02013-08-02 14:45:08 -0400357 entry->def.cipso = doi_def;
358 entry->def.type = NETLBL_NLTYPE_CIPSOV4;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500359 } else if (addr != NULL && mask != NULL) {
360 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
361 if (addrmap == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000362 goto out_addrmap;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500363 INIT_LIST_HEAD(&addrmap->list4);
364 INIT_LIST_HEAD(&addrmap->list6);
365
366 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
367 if (addrinfo == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000368 goto out_addrinfo;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400369 addrinfo->def.cipso = doi_def;
370 addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500371 addrinfo->list.addr = addr->s_addr & mask->s_addr;
372 addrinfo->list.mask = mask->s_addr;
373 addrinfo->list.valid = 1;
374 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
375 if (ret_val != 0)
376 goto cfg_cipsov4_map_add_failure;
377
Paul Moore6a8b7f02013-08-02 14:45:08 -0400378 entry->def.addrsel = addrmap;
379 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500380 } else {
381 ret_val = -EINVAL;
Julia Lawall94a80d62011-08-11 00:06:04 +0000382 goto out_addrmap;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400383 }
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500384
Paul Mooreeda61d32008-02-04 22:29:47 -0800385 ret_val = netlbl_domhsh_add(entry, audit_info);
386 if (ret_val != 0)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500387 goto cfg_cipsov4_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800388
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500389 return 0;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400390
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500391cfg_cipsov4_map_add_failure:
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500392 kfree(addrinfo);
Julia Lawall94a80d62011-08-11 00:06:04 +0000393out_addrinfo:
394 kfree(addrmap);
395out_addrmap:
396 kfree(entry->domain);
397out_domain:
398 kfree(entry);
399out_entry:
400 cipso_v4_doi_putdef(doi_def);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500401 return ret_val;
Paul Mooreeda61d32008-02-04 22:29:47 -0800402}
403
Paul Mooreeda61d32008-02-04 22:29:47 -0800404/*
Paul Moore02752762006-11-29 13:18:18 -0500405 * Security Attribute Functions
406 */
407
408/**
409 * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
410 * @catmap: the category bitmap
411 * @offset: the offset to start searching at, in bits
412 *
413 * Description:
414 * This function walks a LSM secattr category bitmap starting at @offset and
415 * returns the spot of the first set bit or -ENOENT if no bits are set.
416 *
417 */
418int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
419 u32 offset)
420{
421 struct netlbl_lsm_secattr_catmap *iter = catmap;
422 u32 node_idx;
423 u32 node_bit;
424 NETLBL_CATMAP_MAPTYPE bitmap;
425
426 if (offset > iter->startbit) {
427 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
428 iter = iter->next;
429 if (iter == NULL)
430 return -ENOENT;
431 }
432 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
433 node_bit = offset - iter->startbit -
434 (NETLBL_CATMAP_MAPSIZE * node_idx);
435 } else {
436 node_idx = 0;
437 node_bit = 0;
438 }
439 bitmap = iter->bitmap[node_idx] >> node_bit;
440
441 for (;;) {
442 if (bitmap != 0) {
443 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
444 bitmap >>= 1;
445 node_bit++;
446 }
447 return iter->startbit +
448 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
449 }
450 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
451 if (iter->next != NULL) {
452 iter = iter->next;
453 node_idx = 0;
454 } else
455 return -ENOENT;
456 }
457 bitmap = iter->bitmap[node_idx];
458 node_bit = 0;
459 }
460
461 return -ENOENT;
462}
463
464/**
465 * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
466 * @catmap: the category bitmap
467 * @offset: the offset to start searching at, in bits
468 *
469 * Description:
470 * This function walks a LSM secattr category bitmap starting at @offset and
471 * returns the spot of the first cleared bit or -ENOENT if the offset is past
472 * the end of the bitmap.
473 *
474 */
475int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
476 u32 offset)
477{
478 struct netlbl_lsm_secattr_catmap *iter = catmap;
479 u32 node_idx;
480 u32 node_bit;
481 NETLBL_CATMAP_MAPTYPE bitmask;
482 NETLBL_CATMAP_MAPTYPE bitmap;
483
484 if (offset > iter->startbit) {
485 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
486 iter = iter->next;
487 if (iter == NULL)
488 return -ENOENT;
489 }
490 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
491 node_bit = offset - iter->startbit -
492 (NETLBL_CATMAP_MAPSIZE * node_idx);
493 } else {
494 node_idx = 0;
495 node_bit = 0;
496 }
497 bitmask = NETLBL_CATMAP_BIT << node_bit;
498
499 for (;;) {
500 bitmap = iter->bitmap[node_idx];
501 while (bitmask != 0 && (bitmap & bitmask) != 0) {
502 bitmask <<= 1;
503 node_bit++;
504 }
505
506 if (bitmask != 0)
507 return iter->startbit +
508 (NETLBL_CATMAP_MAPSIZE * node_idx) +
509 node_bit - 1;
510 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
511 if (iter->next == NULL)
512 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
513 iter = iter->next;
514 node_idx = 0;
515 }
516 bitmask = NETLBL_CATMAP_BIT;
517 node_bit = 0;
518 }
519
520 return -ENOENT;
521}
522
523/**
524 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
525 * @catmap: the category bitmap
526 * @bit: the bit to set
527 * @flags: memory allocation flags
528 *
529 * Description:
530 * Set the bit specified by @bit in @catmap. Returns zero on success,
531 * negative values on failure.
532 *
533 */
534int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
535 u32 bit,
536 gfp_t flags)
537{
538 struct netlbl_lsm_secattr_catmap *iter = catmap;
539 u32 node_bit;
540 u32 node_idx;
541
542 while (iter->next != NULL &&
543 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
544 iter = iter->next;
545 if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
546 iter->next = netlbl_secattr_catmap_alloc(flags);
547 if (iter->next == NULL)
548 return -ENOMEM;
549 iter = iter->next;
550 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
551 }
552
553 /* gcc always rounds to zero when doing integer division */
554 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
555 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
556 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
557
558 return 0;
559}
560
561/**
562 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
563 * @catmap: the category bitmap
564 * @start: the starting bit
565 * @end: the last bit in the string
566 * @flags: memory allocation flags
567 *
568 * Description:
569 * Set a range of bits, starting at @start and ending with @end. Returns zero
570 * on success, negative values on failure.
571 *
572 */
573int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
574 u32 start,
575 u32 end,
576 gfp_t flags)
577{
578 int ret_val = 0;
579 struct netlbl_lsm_secattr_catmap *iter = catmap;
580 u32 iter_max_spot;
581 u32 spot;
582
583 /* XXX - This could probably be made a bit faster by combining writes
584 * to the catmap instead of setting a single bit each time, but for
585 * right now skipping to the start of the range in the catmap should
586 * be a nice improvement over calling the individual setbit function
587 * repeatedly from a loop. */
588
589 while (iter->next != NULL &&
590 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
591 iter = iter->next;
592 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
593
594 for (spot = start; spot <= end && ret_val == 0; spot++) {
595 if (spot >= iter_max_spot && iter->next != NULL) {
596 iter = iter->next;
597 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
598 }
Dan Carpenter64b5fad2012-03-21 20:41:01 +0000599 ret_val = netlbl_secattr_catmap_setbit(iter, spot, flags);
Paul Moore02752762006-11-29 13:18:18 -0500600 }
601
602 return ret_val;
603}
604
605/*
Paul Moored15c3452006-08-03 16:48:37 -0700606 * LSM Functions
607 */
608
609/**
Paul Moore23bcdc12007-07-18 12:28:45 -0400610 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
611 *
612 * Description:
613 * The LSM can use this function to determine if it should use NetLabel
614 * security attributes in it's enforcement mechanism. Currently, NetLabel is
615 * considered to be enabled when it's configuration contains a valid setup for
616 * at least one labeled protocol (i.e. NetLabel can understand incoming
617 * labeled packets of at least one type); otherwise NetLabel is considered to
618 * be disabled.
619 *
620 */
621int netlbl_enabled(void)
622{
623 /* At some point we probably want to expose this mechanism to the user
624 * as well so that admins can toggle NetLabel regardless of the
625 * configuration */
Paul Moorec783f1c2008-01-29 08:37:52 -0500626 return (atomic_read(&netlabel_mgmt_protocount) > 0);
Paul Moore23bcdc12007-07-18 12:28:45 -0400627}
628
629/**
Paul Moore389fb8002009-03-27 17:10:34 -0400630 * netlbl_sock_setattr - Label a socket using the correct protocol
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700631 * @sk: the socket to label
Paul Moore389fb8002009-03-27 17:10:34 -0400632 * @family: protocol family
Paul Moored15c3452006-08-03 16:48:37 -0700633 * @secattr: the security attributes
634 *
635 * Description:
636 * Attach the correct label to the given socket using the security attributes
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700637 * specified in @secattr. This function requires exclusive access to @sk,
638 * which means it either needs to be in the process of being created or locked.
Paul Moore63c41682008-10-10 10:16:32 -0400639 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
640 * network address selectors (can't blindly label the socket), and negative
641 * values on all other failures.
Paul Moored15c3452006-08-03 16:48:37 -0700642 *
643 */
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700644int netlbl_sock_setattr(struct sock *sk,
Paul Moore389fb8002009-03-27 17:10:34 -0400645 u16 family,
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700646 const struct netlbl_lsm_secattr *secattr)
Paul Moored15c3452006-08-03 16:48:37 -0700647{
Paul Moore389fb8002009-03-27 17:10:34 -0400648 int ret_val;
Paul Moored15c3452006-08-03 16:48:37 -0700649 struct netlbl_dom_map *dom_entry;
650
651 rcu_read_lock();
652 dom_entry = netlbl_domhsh_getentry(secattr->domain);
Paul Moore389fb8002009-03-27 17:10:34 -0400653 if (dom_entry == NULL) {
654 ret_val = -ENOENT;
Paul Moored15c3452006-08-03 16:48:37 -0700655 goto socket_setattr_return;
Paul Moore389fb8002009-03-27 17:10:34 -0400656 }
657 switch (family) {
658 case AF_INET:
Paul Moore6a8b7f02013-08-02 14:45:08 -0400659 switch (dom_entry->def.type) {
Paul Moore389fb8002009-03-27 17:10:34 -0400660 case NETLBL_NLTYPE_ADDRSELECT:
661 ret_val = -EDESTADDRREQ;
662 break;
663 case NETLBL_NLTYPE_CIPSOV4:
664 ret_val = cipso_v4_sock_setattr(sk,
Paul Moore6a8b7f02013-08-02 14:45:08 -0400665 dom_entry->def.cipso,
666 secattr);
Paul Moore389fb8002009-03-27 17:10:34 -0400667 break;
668 case NETLBL_NLTYPE_UNLABELED:
669 ret_val = 0;
670 break;
671 default:
672 ret_val = -ENOENT;
673 }
Paul Moore63c41682008-10-10 10:16:32 -0400674 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000675#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -0400676 case AF_INET6:
677 /* since we don't support any IPv6 labeling protocols right
678 * now we can optimize everything away until we do */
Paul Moored15c3452006-08-03 16:48:37 -0700679 ret_val = 0;
680 break;
Paul Moore389fb8002009-03-27 17:10:34 -0400681#endif /* IPv6 */
Paul Moored15c3452006-08-03 16:48:37 -0700682 default:
Paul Moore389fb8002009-03-27 17:10:34 -0400683 ret_val = -EPROTONOSUPPORT;
Paul Moored15c3452006-08-03 16:48:37 -0700684 }
685
686socket_setattr_return:
687 rcu_read_unlock();
688 return ret_val;
689}
690
691/**
Paul Moore014ab192008-10-10 10:16:33 -0400692 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
693 * @sk: the socket
694 *
695 * Description:
696 * Remove all the NetLabel labeling from @sk. The caller is responsible for
697 * ensuring that @sk is locked.
698 *
699 */
700void netlbl_sock_delattr(struct sock *sk)
701{
702 cipso_v4_sock_delattr(sk);
703}
704
705/**
Paul Moore14a72f52006-09-25 15:52:01 -0700706 * netlbl_sock_getattr - Determine the security attributes of a sock
707 * @sk: the sock
708 * @secattr: the security attributes
709 *
710 * Description:
Paul Moore8cc44572008-01-29 08:44:21 -0500711 * Examines the given sock to see if any NetLabel style labeling has been
Paul Moore14a72f52006-09-25 15:52:01 -0700712 * applied to the sock, if so it parses the socket label and returns the
713 * security attributes in @secattr. Returns zero on success, negative values
714 * on failure.
715 *
716 */
Paul Moore389fb8002009-03-27 17:10:34 -0400717int netlbl_sock_getattr(struct sock *sk,
718 struct netlbl_lsm_secattr *secattr)
Paul Moore14a72f52006-09-25 15:52:01 -0700719{
Paul Moore389fb8002009-03-27 17:10:34 -0400720 int ret_val;
721
722 switch (sk->sk_family) {
723 case AF_INET:
724 ret_val = cipso_v4_sock_getattr(sk, secattr);
725 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000726#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -0400727 case AF_INET6:
728 ret_val = -ENOMSG;
729 break;
730#endif /* IPv6 */
731 default:
732 ret_val = -EPROTONOSUPPORT;
733 }
734
735 return ret_val;
Paul Moore14a72f52006-09-25 15:52:01 -0700736}
737
738/**
Paul Moore014ab192008-10-10 10:16:33 -0400739 * netlbl_conn_setattr - Label a connected socket using the correct protocol
740 * @sk: the socket to label
741 * @addr: the destination address
742 * @secattr: the security attributes
743 *
744 * Description:
745 * Attach the correct label to the given connected socket using the security
746 * attributes specified in @secattr. The caller is responsible for ensuring
747 * that @sk is locked. Returns zero on success, negative values on failure.
748 *
749 */
750int netlbl_conn_setattr(struct sock *sk,
751 struct sockaddr *addr,
752 const struct netlbl_lsm_secattr *secattr)
753{
754 int ret_val;
755 struct sockaddr_in *addr4;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400756 struct netlbl_dommap_def *entry;
Paul Moore014ab192008-10-10 10:16:33 -0400757
758 rcu_read_lock();
759 switch (addr->sa_family) {
760 case AF_INET:
761 addr4 = (struct sockaddr_in *)addr;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400762 entry = netlbl_domhsh_getentry_af4(secattr->domain,
763 addr4->sin_addr.s_addr);
764 if (entry == NULL) {
Paul Moore014ab192008-10-10 10:16:33 -0400765 ret_val = -ENOENT;
766 goto conn_setattr_return;
767 }
Paul Moore6a8b7f02013-08-02 14:45:08 -0400768 switch (entry->type) {
Paul Moore014ab192008-10-10 10:16:33 -0400769 case NETLBL_NLTYPE_CIPSOV4:
770 ret_val = cipso_v4_sock_setattr(sk,
Paul Moore6a8b7f02013-08-02 14:45:08 -0400771 entry->cipso, secattr);
Paul Moore014ab192008-10-10 10:16:33 -0400772 break;
773 case NETLBL_NLTYPE_UNLABELED:
774 /* just delete the protocols we support for right now
775 * but we could remove other protocols if needed */
776 cipso_v4_sock_delattr(sk);
777 ret_val = 0;
778 break;
779 default:
780 ret_val = -ENOENT;
781 }
782 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000783#if IS_ENABLED(CONFIG_IPV6)
Paul Moore014ab192008-10-10 10:16:33 -0400784 case AF_INET6:
785 /* since we don't support any IPv6 labeling protocols right
786 * now we can optimize everything away until we do */
787 ret_val = 0;
788 break;
789#endif /* IPv6 */
790 default:
Paul Moore389fb8002009-03-27 17:10:34 -0400791 ret_val = -EPROTONOSUPPORT;
Paul Moore014ab192008-10-10 10:16:33 -0400792 }
793
794conn_setattr_return:
795 rcu_read_unlock();
796 return ret_val;
797}
798
799/**
Paul Moore389fb8002009-03-27 17:10:34 -0400800 * netlbl_req_setattr - Label a request socket using the correct protocol
801 * @req: the request socket to label
802 * @secattr: the security attributes
803 *
804 * Description:
805 * Attach the correct label to the given socket using the security attributes
806 * specified in @secattr. Returns zero on success, negative values on failure.
807 *
808 */
809int netlbl_req_setattr(struct request_sock *req,
810 const struct netlbl_lsm_secattr *secattr)
811{
812 int ret_val;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400813 struct netlbl_dommap_def *entry;
Paul Moore389fb8002009-03-27 17:10:34 -0400814
815 rcu_read_lock();
Paul Moore389fb8002009-03-27 17:10:34 -0400816 switch (req->rsk_ops->family) {
817 case AF_INET:
Paul Moore6a8b7f02013-08-02 14:45:08 -0400818 entry = netlbl_domhsh_getentry_af4(secattr->domain,
Eric Dumazet634fb9792013-10-09 15:21:29 -0700819 inet_rsk(req)->ir_rmt_addr);
Paul Moore6a8b7f02013-08-02 14:45:08 -0400820 if (entry == NULL) {
821 ret_val = -ENOENT;
822 goto req_setattr_return;
Paul Moore389fb8002009-03-27 17:10:34 -0400823 }
Paul Moore6a8b7f02013-08-02 14:45:08 -0400824 switch (entry->type) {
Paul Moore389fb8002009-03-27 17:10:34 -0400825 case NETLBL_NLTYPE_CIPSOV4:
Paul Moore6a8b7f02013-08-02 14:45:08 -0400826 ret_val = cipso_v4_req_setattr(req,
827 entry->cipso, secattr);
Paul Moore389fb8002009-03-27 17:10:34 -0400828 break;
829 case NETLBL_NLTYPE_UNLABELED:
830 /* just delete the protocols we support for right now
831 * but we could remove other protocols if needed */
832 cipso_v4_req_delattr(req);
833 ret_val = 0;
834 break;
835 default:
836 ret_val = -ENOENT;
837 }
838 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000839#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -0400840 case AF_INET6:
841 /* since we don't support any IPv6 labeling protocols right
842 * now we can optimize everything away until we do */
843 ret_val = 0;
844 break;
845#endif /* IPv6 */
846 default:
847 ret_val = -EPROTONOSUPPORT;
848 }
849
850req_setattr_return:
851 rcu_read_unlock();
852 return ret_val;
853}
854
855/**
Paul Moore07feee82009-03-27 17:10:54 -0400856* netlbl_req_delattr - Delete all the NetLabel labels on a socket
857* @req: the socket
858*
859* Description:
860* Remove all the NetLabel labeling from @req.
861*
862*/
863void netlbl_req_delattr(struct request_sock *req)
864{
865 cipso_v4_req_delattr(req);
866}
867
868/**
Paul Moore948bf852008-10-10 10:16:32 -0400869 * netlbl_skbuff_setattr - Label a packet using the correct protocol
870 * @skb: the packet
871 * @family: protocol family
872 * @secattr: the security attributes
873 *
874 * Description:
875 * Attach the correct label to the given packet using the security attributes
876 * specified in @secattr. Returns zero on success, negative values on failure.
877 *
878 */
879int netlbl_skbuff_setattr(struct sk_buff *skb,
880 u16 family,
881 const struct netlbl_lsm_secattr *secattr)
882{
883 int ret_val;
884 struct iphdr *hdr4;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400885 struct netlbl_dommap_def *entry;
Paul Moore948bf852008-10-10 10:16:32 -0400886
887 rcu_read_lock();
888 switch (family) {
889 case AF_INET:
890 hdr4 = ip_hdr(skb);
Paul Moore6a8b7f02013-08-02 14:45:08 -0400891 entry = netlbl_domhsh_getentry_af4(secattr->domain,hdr4->daddr);
892 if (entry == NULL) {
Paul Moore948bf852008-10-10 10:16:32 -0400893 ret_val = -ENOENT;
894 goto skbuff_setattr_return;
895 }
Paul Moore6a8b7f02013-08-02 14:45:08 -0400896 switch (entry->type) {
Paul Moore948bf852008-10-10 10:16:32 -0400897 case NETLBL_NLTYPE_CIPSOV4:
Paul Moore6a8b7f02013-08-02 14:45:08 -0400898 ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso,
899 secattr);
Paul Moore948bf852008-10-10 10:16:32 -0400900 break;
901 case NETLBL_NLTYPE_UNLABELED:
902 /* just delete the protocols we support for right now
903 * but we could remove other protocols if needed */
904 ret_val = cipso_v4_skbuff_delattr(skb);
905 break;
906 default:
907 ret_val = -ENOENT;
908 }
909 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000910#if IS_ENABLED(CONFIG_IPV6)
Paul Moore948bf852008-10-10 10:16:32 -0400911 case AF_INET6:
912 /* since we don't support any IPv6 labeling protocols right
913 * now we can optimize everything away until we do */
914 ret_val = 0;
915 break;
916#endif /* IPv6 */
917 default:
Paul Moore389fb8002009-03-27 17:10:34 -0400918 ret_val = -EPROTONOSUPPORT;
Paul Moore948bf852008-10-10 10:16:32 -0400919 }
920
921skbuff_setattr_return:
922 rcu_read_unlock();
923 return ret_val;
924}
925
926/**
Paul Moored15c3452006-08-03 16:48:37 -0700927 * netlbl_skbuff_getattr - Determine the security attributes of a packet
928 * @skb: the packet
Paul Moore75e22912008-01-29 08:38:04 -0500929 * @family: protocol family
Paul Moored15c3452006-08-03 16:48:37 -0700930 * @secattr: the security attributes
931 *
932 * Description:
933 * Examines the given packet to see if a recognized form of packet labeling
934 * is present, if so it parses the packet label and returns the security
935 * attributes in @secattr. Returns zero on success, negative values on
936 * failure.
937 *
938 */
939int netlbl_skbuff_getattr(const struct sk_buff *skb,
Paul Moore75e22912008-01-29 08:38:04 -0500940 u16 family,
Paul Moored15c3452006-08-03 16:48:37 -0700941 struct netlbl_lsm_secattr *secattr)
942{
Paul Moore389fb8002009-03-27 17:10:34 -0400943 switch (family) {
944 case AF_INET:
945 if (CIPSO_V4_OPTEXIST(skb) &&
946 cipso_v4_skbuff_getattr(skb, secattr) == 0)
947 return 0;
948 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000949#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -0400950 case AF_INET6:
951 break;
952#endif /* IPv6 */
953 }
Paul Moored15c3452006-08-03 16:48:37 -0700954
Paul Moore8cc44572008-01-29 08:44:21 -0500955 return netlbl_unlabel_getattr(skb, family, secattr);
Paul Moored15c3452006-08-03 16:48:37 -0700956}
957
958/**
959 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
960 * @skb: the packet
961 * @error: the error code
Paul Mooredfaebe92008-10-10 10:16:31 -0400962 * @gateway: true if host is acting as a gateway, false otherwise
Paul Moored15c3452006-08-03 16:48:37 -0700963 *
964 * Description:
965 * Deal with a LSM problem when handling the packet in @skb, typically this is
966 * a permission denied problem (-EACCES). The correct action is determined
967 * according to the packet's labeling protocol.
968 *
969 */
Paul Mooredfaebe92008-10-10 10:16:31 -0400970void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
Paul Moored15c3452006-08-03 16:48:37 -0700971{
972 if (CIPSO_V4_OPTEXIST(skb))
Paul Mooredfaebe92008-10-10 10:16:31 -0400973 cipso_v4_error(skb, error, gateway);
Paul Moored15c3452006-08-03 16:48:37 -0700974}
975
976/**
977 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
978 *
979 * Description:
980 * For all of the NetLabel protocols that support some form of label mapping
981 * cache, invalidate the cache. Returns zero on success, negative values on
982 * error.
983 *
984 */
985void netlbl_cache_invalidate(void)
986{
987 cipso_v4_cache_invalidate();
988}
989
990/**
991 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
992 * @skb: the packet
993 * @secattr: the packet's security attributes
994 *
995 * Description:
996 * Add the LSM security attributes for the given packet to the underlying
997 * NetLabel protocol's label mapping cache. Returns zero on success, negative
998 * values on error.
999 *
1000 */
1001int netlbl_cache_add(const struct sk_buff *skb,
1002 const struct netlbl_lsm_secattr *secattr)
1003{
Paul Moore701a90b2006-11-17 17:38:46 -05001004 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
Paul Moored15c3452006-08-03 16:48:37 -07001005 return -ENOMSG;
1006
1007 if (CIPSO_V4_OPTEXIST(skb))
1008 return cipso_v4_cache_add(skb, secattr);
1009
1010 return -ENOMSG;
1011}
1012
1013/*
Paul Moore6c2e8ac2008-12-31 12:54:11 -05001014 * Protocol Engine Functions
1015 */
1016
1017/**
1018 * netlbl_audit_start - Start an audit message
1019 * @type: audit message type
1020 * @audit_info: NetLabel audit information
1021 *
1022 * Description:
1023 * Start an audit message using the type specified in @type and fill the audit
1024 * message with some fields common to all NetLabel audit messages. This
1025 * function should only be used by protocol engines, not LSMs. Returns a
1026 * pointer to the audit buffer on success, NULL on failure.
1027 *
1028 */
1029struct audit_buffer *netlbl_audit_start(int type,
1030 struct netlbl_audit *audit_info)
1031{
1032 return netlbl_audit_start_common(type, audit_info);
1033}
1034
1035/*
Paul Moored15c3452006-08-03 16:48:37 -07001036 * Setup Functions
1037 */
1038
1039/**
1040 * netlbl_init - Initialize NetLabel
1041 *
1042 * Description:
1043 * Perform the required NetLabel initialization before first use.
1044 *
1045 */
1046static int __init netlbl_init(void)
1047{
1048 int ret_val;
1049
1050 printk(KERN_INFO "NetLabel: Initializing\n");
1051 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1052 (1 << NETLBL_DOMHSH_BITSIZE));
1053 printk(KERN_INFO "NetLabel: protocols ="
1054 " UNLABELED"
1055 " CIPSOv4"
1056 "\n");
1057
1058 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1059 if (ret_val != 0)
1060 goto init_failure;
1061
Paul Moore8cc44572008-01-29 08:44:21 -05001062 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1063 if (ret_val != 0)
1064 goto init_failure;
1065
Paul Moored15c3452006-08-03 16:48:37 -07001066 ret_val = netlbl_netlink_init();
1067 if (ret_val != 0)
1068 goto init_failure;
1069
1070 ret_val = netlbl_unlabel_defconf();
1071 if (ret_val != 0)
1072 goto init_failure;
1073 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1074
1075 return 0;
1076
1077init_failure:
1078 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1079}
1080
1081subsys_initcall(netlbl_init);