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
8 * Author: Paul Moore <paul@paul-moore.com>
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
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.
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.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see <http://www.gnu.org/licenses/>.
30 #include <linux/init.h>
31 #include <linux/types.h>
32 #include <linux/slab.h>
33 #include <linux/audit.h>
35 #include <linux/in6.h>
38 #include <net/netlabel.h>
39 #include <net/cipso_ipv4.h>
41 #include <linux/atomic.h>
43 #include "netlabel_domainhash.h"
44 #include "netlabel_unlabeled.h"
45 #include "netlabel_cipso_v4.h"
46 #include "netlabel_user.h"
47 #include "netlabel_mgmt.h"
48 #include "netlabel_addrlist.h"
51 * Configuration Functions
55 * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
56 * @domain: the domain mapping to remove
57 * @family: address family
59 * @mask: IP address mask
60 * @audit_info: NetLabel audit information
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
68 int netlbl_cfg_map_del(const char *domain,
72 struct netlbl_audit *audit_info)
74 if (addr == NULL && mask == NULL) {
75 return netlbl_domhsh_remove(domain, audit_info);
76 } else if (addr != NULL && mask != NULL) {
79 return netlbl_domhsh_remove_af4(domain, addr, mask,
89 * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
90 * @domain: the domain mapping to add
91 * @family: address family
93 * @mask: IP address mask
94 * @audit_info: NetLabel audit information
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.
102 int netlbl_cfg_unlbl_map_add(const char *domain,
106 struct netlbl_audit *audit_info)
108 int ret_val = -ENOMEM;
109 struct netlbl_dom_map *entry;
110 struct netlbl_domaddr_map *addrmap = NULL;
111 struct netlbl_domaddr4_map *map4 = NULL;
112 struct netlbl_domaddr6_map *map6 = NULL;
114 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
117 if (domain != NULL) {
118 entry->domain = kstrdup(domain, GFP_ATOMIC);
119 if (entry->domain == NULL)
120 goto cfg_unlbl_map_add_failure;
123 if (addr == NULL && mask == NULL)
124 entry->def.type = NETLBL_NLTYPE_UNLABELED;
125 else if (addr != NULL && mask != NULL) {
126 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
128 goto cfg_unlbl_map_add_failure;
129 INIT_LIST_HEAD(&addrmap->list4);
130 INIT_LIST_HEAD(&addrmap->list6);
134 const struct in_addr *addr4 = addr;
135 const struct in_addr *mask4 = mask;
136 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
138 goto cfg_unlbl_map_add_failure;
139 map4->def.type = NETLBL_NLTYPE_UNLABELED;
140 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,
146 goto cfg_unlbl_map_add_failure;
149 #if IS_ENABLED(CONFIG_IPV6)
151 const struct in6_addr *addr6 = addr;
152 const struct in6_addr *mask6 = mask;
153 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
155 goto cfg_unlbl_map_add_failure;
156 map6->def.type = NETLBL_NLTYPE_UNLABELED;
157 map6->list.addr = *addr6;
158 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];
162 map6->list.mask = *mask6;
163 map6->list.valid = 1;
164 ret_val = netlbl_af6list_add(&map6->list,
167 goto cfg_unlbl_map_add_failure;
172 goto cfg_unlbl_map_add_failure;
176 entry->def.addrsel = addrmap;
177 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
180 goto cfg_unlbl_map_add_failure;
183 ret_val = netlbl_domhsh_add(entry, audit_info);
185 goto cfg_unlbl_map_add_failure;
189 cfg_unlbl_map_add_failure:
190 kfree(entry->domain);
200 * 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
207 * @audit_info: NetLabel audit information
210 * 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.
215 int netlbl_cfg_unlbl_static_add(struct net *net,
216 const char *dev_name,
221 struct netlbl_audit *audit_info)
227 addr_len = sizeof(struct in_addr);
229 #if IS_ENABLED(CONFIG_IPV6)
231 addr_len = sizeof(struct in6_addr);
235 return -EPFNOSUPPORT;
238 return netlbl_unlhsh_add(net,
239 dev_name, addr, mask, addr_len,
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
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.
259 int netlbl_cfg_unlbl_static_del(struct net *net,
260 const char *dev_name,
264 struct netlbl_audit *audit_info)
270 addr_len = sizeof(struct in_addr);
272 #if IS_ENABLED(CONFIG_IPV6)
274 addr_len = sizeof(struct in6_addr);
278 return -EPFNOSUPPORT;
281 return netlbl_unlhsh_remove(net,
282 dev_name, addr, mask, addr_len,
287 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
288 * @doi_def: CIPSO DOI definition
289 * @audit_info: NetLabel audit information
292 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
293 * success and negative values on failure.
296 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
297 struct netlbl_audit *audit_info)
299 return cipso_v4_doi_add(doi_def, audit_info);
303 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
305 * @audit_info: NetLabel audit information
308 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
309 * success and negative values on failure.
312 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
314 cipso_v4_doi_remove(doi, audit_info);
318 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
319 * @doi: the CIPSO DOI
320 * @domain: the domain mapping to add
322 * @mask: IP address mask
323 * @audit_info: NetLabel audit information
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.
331 int netlbl_cfg_cipsov4_map_add(u32 doi,
333 const struct in_addr *addr,
334 const struct in_addr *mask,
335 struct netlbl_audit *audit_info)
337 int ret_val = -ENOMEM;
338 struct cipso_v4_doi *doi_def;
339 struct netlbl_dom_map *entry;
340 struct netlbl_domaddr_map *addrmap = NULL;
341 struct netlbl_domaddr4_map *addrinfo = NULL;
343 doi_def = cipso_v4_doi_getdef(doi);
347 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
350 if (domain != NULL) {
351 entry->domain = kstrdup(domain, GFP_ATOMIC);
352 if (entry->domain == NULL)
356 if (addr == NULL && mask == NULL) {
357 entry->def.cipso = doi_def;
358 entry->def.type = NETLBL_NLTYPE_CIPSOV4;
359 } else if (addr != NULL && mask != NULL) {
360 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
363 INIT_LIST_HEAD(&addrmap->list4);
364 INIT_LIST_HEAD(&addrmap->list6);
366 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
367 if (addrinfo == NULL)
369 addrinfo->def.cipso = doi_def;
370 addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
371 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);
376 goto cfg_cipsov4_map_add_failure;
378 entry->def.addrsel = addrmap;
379 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
385 ret_val = netlbl_domhsh_add(entry, audit_info);
387 goto cfg_cipsov4_map_add_failure;
391 cfg_cipsov4_map_add_failure:
396 kfree(entry->domain);
400 cipso_v4_doi_putdef(doi_def);
405 * Security Attribute Functions
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
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.
418 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
421 struct netlbl_lsm_secattr_catmap *iter = catmap;
424 NETLBL_CATMAP_MAPTYPE bitmap;
426 if (offset > iter->startbit) {
427 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
432 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
433 node_bit = offset - iter->startbit -
434 (NETLBL_CATMAP_MAPSIZE * node_idx);
439 bitmap = iter->bitmap[node_idx] >> node_bit;
443 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
447 return iter->startbit +
448 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
450 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
451 if (iter->next != NULL) {
457 bitmap = iter->bitmap[node_idx];
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
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.
475 int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
478 struct netlbl_lsm_secattr_catmap *iter = catmap;
481 NETLBL_CATMAP_MAPTYPE bitmask;
482 NETLBL_CATMAP_MAPTYPE bitmap;
484 if (offset > iter->startbit) {
485 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
490 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
491 node_bit = offset - iter->startbit -
492 (NETLBL_CATMAP_MAPSIZE * node_idx);
497 bitmask = NETLBL_CATMAP_BIT << node_bit;
500 bitmap = iter->bitmap[node_idx];
501 while (bitmask != 0 && (bitmap & bitmask) != 0) {
507 return iter->startbit +
508 (NETLBL_CATMAP_MAPSIZE * node_idx) +
510 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
511 if (iter->next == NULL)
512 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
516 bitmask = NETLBL_CATMAP_BIT;
524 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
525 * @catmap: pointer to the category bitmap
526 * @bit: the bit to set
527 * @flags: memory allocation flags
530 * Set the bit specified by @bit in @catmap. Returns zero on success,
531 * negative values on failure.
534 int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap **catmap,
538 struct netlbl_lsm_secattr_catmap *iter = *catmap;
542 while (iter->next != NULL &&
543 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
545 if (bit < iter->startbit) {
546 iter = netlbl_secattr_catmap_alloc(flags);
549 iter->next = *catmap;
550 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
552 } else if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
553 iter->next = netlbl_secattr_catmap_alloc(flags);
554 if (iter->next == NULL)
557 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
560 /* gcc always rounds to zero when doing integer division */
561 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
562 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
563 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
569 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
570 * @catmap: pointer to the category bitmap
571 * @start: the starting bit
572 * @end: the last bit in the string
573 * @flags: memory allocation flags
576 * Set a range of bits, starting at @start and ending with @end. Returns zero
577 * on success, negative values on failure.
580 int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap **catmap,
586 struct netlbl_lsm_secattr_catmap *iter = *catmap;
589 u32 orig_spot = iter->startbit;
591 /* XXX - This could probably be made a bit faster by combining writes
592 * to the catmap instead of setting a single bit each time, but for
593 * right now skipping to the start of the range in the catmap should
594 * be a nice improvement over calling the individual setbit function
595 * repeatedly from a loop. */
597 while (iter->next != NULL &&
598 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
600 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
602 for (spot = start; spot <= end && ret_val == 0; spot++) {
603 if (spot >= iter_max_spot && iter->next != NULL) {
605 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
607 ret_val = netlbl_secattr_catmap_setbit(&iter, spot, flags);
608 if (iter->startbit < orig_spot)
620 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
623 * The LSM can use this function to determine if it should use NetLabel
624 * security attributes in it's enforcement mechanism. Currently, NetLabel is
625 * considered to be enabled when it's configuration contains a valid setup for
626 * at least one labeled protocol (i.e. NetLabel can understand incoming
627 * labeled packets of at least one type); otherwise NetLabel is considered to
631 int netlbl_enabled(void)
633 /* At some point we probably want to expose this mechanism to the user
634 * as well so that admins can toggle NetLabel regardless of the
636 return (atomic_read(&netlabel_mgmt_protocount) > 0);
640 * netlbl_sock_setattr - Label a socket using the correct protocol
641 * @sk: the socket to label
642 * @family: protocol family
643 * @secattr: the security attributes
646 * Attach the correct label to the given socket using the security attributes
647 * specified in @secattr. This function requires exclusive access to @sk,
648 * which means it either needs to be in the process of being created or locked.
649 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
650 * network address selectors (can't blindly label the socket), and negative
651 * values on all other failures.
654 int netlbl_sock_setattr(struct sock *sk,
656 const struct netlbl_lsm_secattr *secattr)
659 struct netlbl_dom_map *dom_entry;
662 dom_entry = netlbl_domhsh_getentry(secattr->domain);
663 if (dom_entry == NULL) {
665 goto socket_setattr_return;
669 switch (dom_entry->def.type) {
670 case NETLBL_NLTYPE_ADDRSELECT:
671 ret_val = -EDESTADDRREQ;
673 case NETLBL_NLTYPE_CIPSOV4:
674 ret_val = cipso_v4_sock_setattr(sk,
675 dom_entry->def.cipso,
678 case NETLBL_NLTYPE_UNLABELED:
685 #if IS_ENABLED(CONFIG_IPV6)
687 /* since we don't support any IPv6 labeling protocols right
688 * now we can optimize everything away until we do */
693 ret_val = -EPROTONOSUPPORT;
696 socket_setattr_return:
702 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
706 * Remove all the NetLabel labeling from @sk. The caller is responsible for
707 * ensuring that @sk is locked.
710 void netlbl_sock_delattr(struct sock *sk)
712 cipso_v4_sock_delattr(sk);
716 * netlbl_sock_getattr - Determine the security attributes of a sock
718 * @secattr: the security attributes
721 * Examines the given sock to see if any NetLabel style labeling has been
722 * applied to the sock, if so it parses the socket label and returns the
723 * security attributes in @secattr. Returns zero on success, negative values
727 int netlbl_sock_getattr(struct sock *sk,
728 struct netlbl_lsm_secattr *secattr)
732 switch (sk->sk_family) {
734 ret_val = cipso_v4_sock_getattr(sk, secattr);
736 #if IS_ENABLED(CONFIG_IPV6)
742 ret_val = -EPROTONOSUPPORT;
749 * netlbl_conn_setattr - Label a connected socket using the correct protocol
750 * @sk: the socket to label
751 * @addr: the destination address
752 * @secattr: the security attributes
755 * Attach the correct label to the given connected socket using the security
756 * attributes specified in @secattr. The caller is responsible for ensuring
757 * that @sk is locked. Returns zero on success, negative values on failure.
760 int netlbl_conn_setattr(struct sock *sk,
761 struct sockaddr *addr,
762 const struct netlbl_lsm_secattr *secattr)
765 struct sockaddr_in *addr4;
766 struct netlbl_dommap_def *entry;
769 switch (addr->sa_family) {
771 addr4 = (struct sockaddr_in *)addr;
772 entry = netlbl_domhsh_getentry_af4(secattr->domain,
773 addr4->sin_addr.s_addr);
776 goto conn_setattr_return;
778 switch (entry->type) {
779 case NETLBL_NLTYPE_CIPSOV4:
780 ret_val = cipso_v4_sock_setattr(sk,
781 entry->cipso, secattr);
783 case NETLBL_NLTYPE_UNLABELED:
784 /* just delete the protocols we support for right now
785 * but we could remove other protocols if needed */
786 cipso_v4_sock_delattr(sk);
793 #if IS_ENABLED(CONFIG_IPV6)
795 /* since we don't support any IPv6 labeling protocols right
796 * now we can optimize everything away until we do */
801 ret_val = -EPROTONOSUPPORT;
810 * netlbl_req_setattr - Label a request socket using the correct protocol
811 * @req: the request socket to label
812 * @secattr: the security attributes
815 * Attach the correct label to the given socket using the security attributes
816 * specified in @secattr. Returns zero on success, negative values on failure.
819 int netlbl_req_setattr(struct request_sock *req,
820 const struct netlbl_lsm_secattr *secattr)
823 struct netlbl_dommap_def *entry;
826 switch (req->rsk_ops->family) {
828 entry = netlbl_domhsh_getentry_af4(secattr->domain,
829 inet_rsk(req)->ir_rmt_addr);
832 goto req_setattr_return;
834 switch (entry->type) {
835 case NETLBL_NLTYPE_CIPSOV4:
836 ret_val = cipso_v4_req_setattr(req,
837 entry->cipso, secattr);
839 case NETLBL_NLTYPE_UNLABELED:
840 /* just delete the protocols we support for right now
841 * but we could remove other protocols if needed */
842 cipso_v4_req_delattr(req);
849 #if IS_ENABLED(CONFIG_IPV6)
851 /* since we don't support any IPv6 labeling protocols right
852 * now we can optimize everything away until we do */
857 ret_val = -EPROTONOSUPPORT;
866 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
870 * Remove all the NetLabel labeling from @req.
873 void netlbl_req_delattr(struct request_sock *req)
875 cipso_v4_req_delattr(req);
879 * netlbl_skbuff_setattr - Label a packet using the correct protocol
881 * @family: protocol family
882 * @secattr: the security attributes
885 * Attach the correct label to the given packet using the security attributes
886 * specified in @secattr. Returns zero on success, negative values on failure.
889 int netlbl_skbuff_setattr(struct sk_buff *skb,
891 const struct netlbl_lsm_secattr *secattr)
895 struct netlbl_dommap_def *entry;
901 entry = netlbl_domhsh_getentry_af4(secattr->domain,hdr4->daddr);
904 goto skbuff_setattr_return;
906 switch (entry->type) {
907 case NETLBL_NLTYPE_CIPSOV4:
908 ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso,
911 case NETLBL_NLTYPE_UNLABELED:
912 /* just delete the protocols we support for right now
913 * but we could remove other protocols if needed */
914 ret_val = cipso_v4_skbuff_delattr(skb);
920 #if IS_ENABLED(CONFIG_IPV6)
922 /* since we don't support any IPv6 labeling protocols right
923 * now we can optimize everything away until we do */
928 ret_val = -EPROTONOSUPPORT;
931 skbuff_setattr_return:
937 * netlbl_skbuff_getattr - Determine the security attributes of a packet
939 * @family: protocol family
940 * @secattr: the security attributes
943 * Examines the given packet to see if a recognized form of packet labeling
944 * is present, if so it parses the packet label and returns the security
945 * attributes in @secattr. Returns zero on success, negative values on
949 int netlbl_skbuff_getattr(const struct sk_buff *skb,
951 struct netlbl_lsm_secattr *secattr)
955 if (CIPSO_V4_OPTEXIST(skb) &&
956 cipso_v4_skbuff_getattr(skb, secattr) == 0)
959 #if IS_ENABLED(CONFIG_IPV6)
965 return netlbl_unlabel_getattr(skb, family, secattr);
969 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
971 * @error: the error code
972 * @gateway: true if host is acting as a gateway, false otherwise
975 * Deal with a LSM problem when handling the packet in @skb, typically this is
976 * a permission denied problem (-EACCES). The correct action is determined
977 * according to the packet's labeling protocol.
980 void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
982 if (CIPSO_V4_OPTEXIST(skb))
983 cipso_v4_error(skb, error, gateway);
987 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
990 * For all of the NetLabel protocols that support some form of label mapping
991 * cache, invalidate the cache. Returns zero on success, negative values on
995 void netlbl_cache_invalidate(void)
997 cipso_v4_cache_invalidate();
1001 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1003 * @secattr: the packet's security attributes
1006 * Add the LSM security attributes for the given packet to the underlying
1007 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1011 int netlbl_cache_add(const struct sk_buff *skb,
1012 const struct netlbl_lsm_secattr *secattr)
1014 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1017 if (CIPSO_V4_OPTEXIST(skb))
1018 return cipso_v4_cache_add(skb, secattr);
1024 * Protocol Engine Functions
1028 * netlbl_audit_start - Start an audit message
1029 * @type: audit message type
1030 * @audit_info: NetLabel audit information
1033 * Start an audit message using the type specified in @type and fill the audit
1034 * message with some fields common to all NetLabel audit messages. This
1035 * function should only be used by protocol engines, not LSMs. Returns a
1036 * pointer to the audit buffer on success, NULL on failure.
1039 struct audit_buffer *netlbl_audit_start(int type,
1040 struct netlbl_audit *audit_info)
1042 return netlbl_audit_start_common(type, audit_info);
1050 * netlbl_init - Initialize NetLabel
1053 * Perform the required NetLabel initialization before first use.
1056 static int __init netlbl_init(void)
1060 printk(KERN_INFO "NetLabel: Initializing\n");
1061 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1062 (1 << NETLBL_DOMHSH_BITSIZE));
1063 printk(KERN_INFO "NetLabel: protocols ="
1068 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1072 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1076 ret_val = netlbl_netlink_init();
1080 ret_val = netlbl_unlabel_defconf();
1083 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1088 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1091 subsys_initcall(netlbl_init);