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;
175 entry->def.addrsel = addrmap;
176 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
179 goto cfg_unlbl_map_add_failure;
182 ret_val = netlbl_domhsh_add(entry, audit_info);
184 goto cfg_unlbl_map_add_failure;
188 cfg_unlbl_map_add_failure:
189 kfree(entry->domain);
199 * netlbl_cfg_unlbl_static_add - Adds a new static label
200 * @net: network namespace
201 * @dev_name: interface name
202 * @addr: IP address in network byte order (struct in[6]_addr)
203 * @mask: address mask in network byte order (struct in[6]_addr)
204 * @family: address family
205 * @secid: LSM secid value for the entry
206 * @audit_info: NetLabel audit information
209 * Adds a new NetLabel static label to be used when protocol provided labels
210 * are not present on incoming traffic. If @dev_name is NULL then the default
211 * interface will be used. Returns zero on success, negative values on failure.
214 int netlbl_cfg_unlbl_static_add(struct net *net,
215 const char *dev_name,
220 struct netlbl_audit *audit_info)
226 addr_len = sizeof(struct in_addr);
228 #if IS_ENABLED(CONFIG_IPV6)
230 addr_len = sizeof(struct in6_addr);
234 return -EPFNOSUPPORT;
237 return netlbl_unlhsh_add(net,
238 dev_name, addr, mask, addr_len,
243 * netlbl_cfg_unlbl_static_del - Removes an existing static label
244 * @net: network namespace
245 * @dev_name: interface name
246 * @addr: IP address in network byte order (struct in[6]_addr)
247 * @mask: address mask in network byte order (struct in[6]_addr)
248 * @family: address family
249 * @secid: LSM secid value for the entry
250 * @audit_info: NetLabel audit information
253 * Removes an existing NetLabel static label used when protocol provided labels
254 * are not present on incoming traffic. If @dev_name is NULL then the default
255 * interface will be used. Returns zero on success, negative values on failure.
258 int netlbl_cfg_unlbl_static_del(struct net *net,
259 const char *dev_name,
263 struct netlbl_audit *audit_info)
269 addr_len = sizeof(struct in_addr);
271 #if IS_ENABLED(CONFIG_IPV6)
273 addr_len = sizeof(struct in6_addr);
277 return -EPFNOSUPPORT;
280 return netlbl_unlhsh_remove(net,
281 dev_name, addr, mask, addr_len,
286 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
287 * @doi_def: CIPSO DOI definition
288 * @audit_info: NetLabel audit information
291 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
292 * success and negative values on failure.
295 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
296 struct netlbl_audit *audit_info)
298 return cipso_v4_doi_add(doi_def, audit_info);
302 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
304 * @audit_info: NetLabel audit information
307 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
308 * success and negative values on failure.
311 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
313 cipso_v4_doi_remove(doi, audit_info);
317 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
318 * @doi: the CIPSO DOI
319 * @domain: the domain mapping to add
321 * @mask: IP address mask
322 * @audit_info: NetLabel audit information
325 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
326 * subsystem. A @domain value of NULL adds a new default domain mapping.
327 * Returns zero on success, negative values on failure.
330 int netlbl_cfg_cipsov4_map_add(u32 doi,
332 const struct in_addr *addr,
333 const struct in_addr *mask,
334 struct netlbl_audit *audit_info)
336 int ret_val = -ENOMEM;
337 struct cipso_v4_doi *doi_def;
338 struct netlbl_dom_map *entry;
339 struct netlbl_domaddr_map *addrmap = NULL;
340 struct netlbl_domaddr4_map *addrinfo = NULL;
342 doi_def = cipso_v4_doi_getdef(doi);
346 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
349 if (domain != NULL) {
350 entry->domain = kstrdup(domain, GFP_ATOMIC);
351 if (entry->domain == NULL)
355 if (addr == NULL && mask == NULL) {
356 entry->def.cipso = doi_def;
357 entry->def.type = NETLBL_NLTYPE_CIPSOV4;
358 } else if (addr != NULL && mask != NULL) {
359 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
362 INIT_LIST_HEAD(&addrmap->list4);
363 INIT_LIST_HEAD(&addrmap->list6);
365 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
366 if (addrinfo == NULL)
368 addrinfo->def.cipso = doi_def;
369 addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
370 addrinfo->list.addr = addr->s_addr & mask->s_addr;
371 addrinfo->list.mask = mask->s_addr;
372 addrinfo->list.valid = 1;
373 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
375 goto cfg_cipsov4_map_add_failure;
377 entry->def.addrsel = addrmap;
378 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
384 ret_val = netlbl_domhsh_add(entry, audit_info);
386 goto cfg_cipsov4_map_add_failure;
390 cfg_cipsov4_map_add_failure:
395 kfree(entry->domain);
399 cipso_v4_doi_putdef(doi_def);
404 * Security Attribute Functions
408 * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
409 * @catmap: the category bitmap
410 * @offset: the offset to start searching at, in bits
413 * This function walks a LSM secattr category bitmap starting at @offset and
414 * returns the spot of the first set bit or -ENOENT if no bits are set.
417 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
420 struct netlbl_lsm_secattr_catmap *iter = catmap;
423 NETLBL_CATMAP_MAPTYPE bitmap;
425 if (offset > iter->startbit) {
426 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
431 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
432 node_bit = offset - iter->startbit -
433 (NETLBL_CATMAP_MAPSIZE * node_idx);
438 bitmap = iter->bitmap[node_idx] >> node_bit;
442 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
446 return iter->startbit +
447 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
449 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
450 if (iter->next != NULL) {
456 bitmap = iter->bitmap[node_idx];
464 * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
465 * @catmap: the category bitmap
466 * @offset: the offset to start searching at, in bits
469 * This function walks a LSM secattr category bitmap starting at @offset and
470 * returns the spot of the first cleared bit or -ENOENT if the offset is past
471 * the end of the bitmap.
474 int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
477 struct netlbl_lsm_secattr_catmap *iter = catmap;
480 NETLBL_CATMAP_MAPTYPE bitmask;
481 NETLBL_CATMAP_MAPTYPE bitmap;
483 if (offset > iter->startbit) {
484 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
489 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
490 node_bit = offset - iter->startbit -
491 (NETLBL_CATMAP_MAPSIZE * node_idx);
496 bitmask = NETLBL_CATMAP_BIT << node_bit;
499 bitmap = iter->bitmap[node_idx];
500 while (bitmask != 0 && (bitmap & bitmask) != 0) {
506 return iter->startbit +
507 (NETLBL_CATMAP_MAPSIZE * node_idx) +
509 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
510 if (iter->next == NULL)
511 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
515 bitmask = NETLBL_CATMAP_BIT;
523 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
524 * @catmap: the category bitmap
525 * @bit: the bit to set
526 * @flags: memory allocation flags
529 * Set the bit specified by @bit in @catmap. Returns zero on success,
530 * negative values on failure.
533 int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
537 struct netlbl_lsm_secattr_catmap *iter = catmap;
541 while (iter->next != NULL &&
542 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
544 if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
545 iter->next = netlbl_secattr_catmap_alloc(flags);
546 if (iter->next == NULL)
549 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
552 /* gcc always rounds to zero when doing integer division */
553 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
554 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
555 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
561 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
562 * @catmap: the category bitmap
563 * @start: the starting bit
564 * @end: the last bit in the string
565 * @flags: memory allocation flags
568 * Set a range of bits, starting at @start and ending with @end. Returns zero
569 * on success, negative values on failure.
572 int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
578 struct netlbl_lsm_secattr_catmap *iter = catmap;
582 /* XXX - This could probably be made a bit faster by combining writes
583 * to the catmap instead of setting a single bit each time, but for
584 * right now skipping to the start of the range in the catmap should
585 * be a nice improvement over calling the individual setbit function
586 * repeatedly from a loop. */
588 while (iter->next != NULL &&
589 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
591 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
593 for (spot = start; spot <= end && ret_val == 0; spot++) {
594 if (spot >= iter_max_spot && iter->next != NULL) {
596 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
598 ret_val = netlbl_secattr_catmap_setbit(iter, spot, flags);
609 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
612 * The LSM can use this function to determine if it should use NetLabel
613 * security attributes in it's enforcement mechanism. Currently, NetLabel is
614 * considered to be enabled when it's configuration contains a valid setup for
615 * at least one labeled protocol (i.e. NetLabel can understand incoming
616 * labeled packets of at least one type); otherwise NetLabel is considered to
620 int netlbl_enabled(void)
622 /* At some point we probably want to expose this mechanism to the user
623 * as well so that admins can toggle NetLabel regardless of the
625 return (atomic_read(&netlabel_mgmt_protocount) > 0);
629 * netlbl_sock_setattr - Label a socket using the correct protocol
630 * @sk: the socket to label
631 * @family: protocol family
632 * @secattr: the security attributes
635 * Attach the correct label to the given socket using the security attributes
636 * specified in @secattr. This function requires exclusive access to @sk,
637 * which means it either needs to be in the process of being created or locked.
638 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
639 * network address selectors (can't blindly label the socket), and negative
640 * values on all other failures.
643 int netlbl_sock_setattr(struct sock *sk,
645 const struct netlbl_lsm_secattr *secattr)
648 struct netlbl_dom_map *dom_entry;
651 dom_entry = netlbl_domhsh_getentry(secattr->domain);
652 if (dom_entry == NULL) {
654 goto socket_setattr_return;
658 switch (dom_entry->def.type) {
659 case NETLBL_NLTYPE_ADDRSELECT:
660 ret_val = -EDESTADDRREQ;
662 case NETLBL_NLTYPE_CIPSOV4:
663 ret_val = cipso_v4_sock_setattr(sk,
664 dom_entry->def.cipso,
667 case NETLBL_NLTYPE_UNLABELED:
674 #if IS_ENABLED(CONFIG_IPV6)
676 /* since we don't support any IPv6 labeling protocols right
677 * now we can optimize everything away until we do */
682 ret_val = -EPROTONOSUPPORT;
685 socket_setattr_return:
691 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
695 * Remove all the NetLabel labeling from @sk. The caller is responsible for
696 * ensuring that @sk is locked.
699 void netlbl_sock_delattr(struct sock *sk)
701 cipso_v4_sock_delattr(sk);
705 * netlbl_sock_getattr - Determine the security attributes of a sock
707 * @secattr: the security attributes
710 * Examines the given sock to see if any NetLabel style labeling has been
711 * applied to the sock, if so it parses the socket label and returns the
712 * security attributes in @secattr. Returns zero on success, negative values
716 int netlbl_sock_getattr(struct sock *sk,
717 struct netlbl_lsm_secattr *secattr)
721 switch (sk->sk_family) {
723 ret_val = cipso_v4_sock_getattr(sk, secattr);
725 #if IS_ENABLED(CONFIG_IPV6)
731 ret_val = -EPROTONOSUPPORT;
738 * netlbl_conn_setattr - Label a connected socket using the correct protocol
739 * @sk: the socket to label
740 * @addr: the destination address
741 * @secattr: the security attributes
744 * Attach the correct label to the given connected socket using the security
745 * attributes specified in @secattr. The caller is responsible for ensuring
746 * that @sk is locked. Returns zero on success, negative values on failure.
749 int netlbl_conn_setattr(struct sock *sk,
750 struct sockaddr *addr,
751 const struct netlbl_lsm_secattr *secattr)
754 struct sockaddr_in *addr4;
755 struct netlbl_dommap_def *entry;
758 switch (addr->sa_family) {
760 addr4 = (struct sockaddr_in *)addr;
761 entry = netlbl_domhsh_getentry_af4(secattr->domain,
762 addr4->sin_addr.s_addr);
765 goto conn_setattr_return;
767 switch (entry->type) {
768 case NETLBL_NLTYPE_CIPSOV4:
769 ret_val = cipso_v4_sock_setattr(sk,
770 entry->cipso, secattr);
772 case NETLBL_NLTYPE_UNLABELED:
773 /* just delete the protocols we support for right now
774 * but we could remove other protocols if needed */
775 cipso_v4_sock_delattr(sk);
782 #if IS_ENABLED(CONFIG_IPV6)
784 /* since we don't support any IPv6 labeling protocols right
785 * now we can optimize everything away until we do */
790 ret_val = -EPROTONOSUPPORT;
799 * netlbl_req_setattr - Label a request socket using the correct protocol
800 * @req: the request socket to label
801 * @secattr: the security attributes
804 * Attach the correct label to the given socket using the security attributes
805 * specified in @secattr. Returns zero on success, negative values on failure.
808 int netlbl_req_setattr(struct request_sock *req,
809 const struct netlbl_lsm_secattr *secattr)
812 struct netlbl_dommap_def *entry;
815 switch (req->rsk_ops->family) {
817 entry = netlbl_domhsh_getentry_af4(secattr->domain,
818 inet_rsk(req)->ir_rmt_addr);
821 goto req_setattr_return;
823 switch (entry->type) {
824 case NETLBL_NLTYPE_CIPSOV4:
825 ret_val = cipso_v4_req_setattr(req,
826 entry->cipso, secattr);
828 case NETLBL_NLTYPE_UNLABELED:
829 /* just delete the protocols we support for right now
830 * but we could remove other protocols if needed */
831 cipso_v4_req_delattr(req);
838 #if IS_ENABLED(CONFIG_IPV6)
840 /* since we don't support any IPv6 labeling protocols right
841 * now we can optimize everything away until we do */
846 ret_val = -EPROTONOSUPPORT;
855 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
859 * Remove all the NetLabel labeling from @req.
862 void netlbl_req_delattr(struct request_sock *req)
864 cipso_v4_req_delattr(req);
868 * netlbl_skbuff_setattr - Label a packet using the correct protocol
870 * @family: protocol family
871 * @secattr: the security attributes
874 * Attach the correct label to the given packet using the security attributes
875 * specified in @secattr. Returns zero on success, negative values on failure.
878 int netlbl_skbuff_setattr(struct sk_buff *skb,
880 const struct netlbl_lsm_secattr *secattr)
884 struct netlbl_dommap_def *entry;
890 entry = netlbl_domhsh_getentry_af4(secattr->domain,hdr4->daddr);
893 goto skbuff_setattr_return;
895 switch (entry->type) {
896 case NETLBL_NLTYPE_CIPSOV4:
897 ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso,
900 case NETLBL_NLTYPE_UNLABELED:
901 /* just delete the protocols we support for right now
902 * but we could remove other protocols if needed */
903 ret_val = cipso_v4_skbuff_delattr(skb);
909 #if IS_ENABLED(CONFIG_IPV6)
911 /* since we don't support any IPv6 labeling protocols right
912 * now we can optimize everything away until we do */
917 ret_val = -EPROTONOSUPPORT;
920 skbuff_setattr_return:
926 * netlbl_skbuff_getattr - Determine the security attributes of a packet
928 * @family: protocol family
929 * @secattr: the security attributes
932 * Examines the given packet to see if a recognized form of packet labeling
933 * is present, if so it parses the packet label and returns the security
934 * attributes in @secattr. Returns zero on success, negative values on
938 int netlbl_skbuff_getattr(const struct sk_buff *skb,
940 struct netlbl_lsm_secattr *secattr)
944 if (CIPSO_V4_OPTEXIST(skb) &&
945 cipso_v4_skbuff_getattr(skb, secattr) == 0)
948 #if IS_ENABLED(CONFIG_IPV6)
954 return netlbl_unlabel_getattr(skb, family, secattr);
958 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
960 * @error: the error code
961 * @gateway: true if host is acting as a gateway, false otherwise
964 * Deal with a LSM problem when handling the packet in @skb, typically this is
965 * a permission denied problem (-EACCES). The correct action is determined
966 * according to the packet's labeling protocol.
969 void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
971 if (CIPSO_V4_OPTEXIST(skb))
972 cipso_v4_error(skb, error, gateway);
976 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
979 * For all of the NetLabel protocols that support some form of label mapping
980 * cache, invalidate the cache. Returns zero on success, negative values on
984 void netlbl_cache_invalidate(void)
986 cipso_v4_cache_invalidate();
990 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
992 * @secattr: the packet's security attributes
995 * Add the LSM security attributes for the given packet to the underlying
996 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1000 int netlbl_cache_add(const struct sk_buff *skb,
1001 const struct netlbl_lsm_secattr *secattr)
1003 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1006 if (CIPSO_V4_OPTEXIST(skb))
1007 return cipso_v4_cache_add(skb, secattr);
1013 * Protocol Engine Functions
1017 * netlbl_audit_start - Start an audit message
1018 * @type: audit message type
1019 * @audit_info: NetLabel audit information
1022 * Start an audit message using the type specified in @type and fill the audit
1023 * message with some fields common to all NetLabel audit messages. This
1024 * function should only be used by protocol engines, not LSMs. Returns a
1025 * pointer to the audit buffer on success, NULL on failure.
1028 struct audit_buffer *netlbl_audit_start(int type,
1029 struct netlbl_audit *audit_info)
1031 return netlbl_audit_start_common(type, audit_info);
1039 * netlbl_init - Initialize NetLabel
1042 * Perform the required NetLabel initialization before first use.
1045 static int __init netlbl_init(void)
1049 printk(KERN_INFO "NetLabel: Initializing\n");
1050 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1051 (1 << NETLBL_DOMHSH_BITSIZE));
1052 printk(KERN_INFO "NetLabel: protocols ="
1057 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1061 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1065 ret_val = netlbl_netlink_init();
1069 ret_val = netlbl_unlabel_defconf();
1072 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1077 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1080 subsys_initcall(netlbl_init);