netlabel: Update kernel configuration API

Update the NetLabel kernel API to expose the new features added in kernel
releases 2.6.25 and 2.6.28: the static/fallback label functionality and network
address based selectors.

Signed-off-by: Paul Moore <paul.moore@hp.com>

include/net/cipso_ipv4.h

@@ -131,7 +131,8 @@ extern int cipso_v4_rbm_strictvalid;
  */
 
 #ifdef CONFIG_NETLABEL
-int cipso_v4_doi_add(struct cipso_v4_doi *doi_def);
+int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
+		     struct netlbl_audit *audit_info);
 void cipso_v4_doi_free(struct cipso_v4_doi *doi_def);
 int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info);
 struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
@@ -140,7 +141,8 @@ int cipso_v4_doi_walk(u32 *skip_cnt,
 		     int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
 	             void *cb_arg);
 #else
-static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
+static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
+				   struct netlbl_audit *audit_info)
 {
 	return -ENOSYS;
 }

include/net/netlabel.h

@@ -33,6 +33,8 @@
 #include <linux/types.h>
 #include <linux/net.h>
 #include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/in6.h>
 #include <net/netlink.h>
 #include <asm/atomic.h>
 
@@ -353,13 +355,37 @@ static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
 /*
  * LSM configuration operations
  */
-int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info);
+int netlbl_cfg_map_del(const char *domain,
-int netlbl_cfg_unlbl_add_map(const char *domain,
+		       u16 family,
+		       const void *addr,
+		       const void *mask,
+		       struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_map_add(const char *domain,
+			     u16 family,
+			     const void *addr,
+			     const void *mask,
 			     struct netlbl_audit *audit_info);
-int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+int netlbl_cfg_unlbl_static_add(struct net *net,
+				const char *dev_name,
+				const void *addr,
+				const void *mask,
+				u16 family,
+				u32 secid,
+				struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_static_del(struct net *net,
+				const char *dev_name,
+				const void *addr,
+				const void *mask,
+				u16 family,
+				struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+			   struct netlbl_audit *audit_info);
+void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_map_add(u32 doi,
 			       const char *domain,
+			       const struct in_addr *addr,
+			       const struct in_addr *mask,
 			       struct netlbl_audit *audit_info);
-
 /*
  * LSM security attribute operations
  */
@@ -401,19 +427,62 @@ void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway);
 void netlbl_cache_invalidate(void);
 int netlbl_cache_add(const struct sk_buff *skb,
 		     const struct netlbl_lsm_secattr *secattr);
+
+/*
+ * Protocol engine operations
+ */
+struct audit_buffer *netlbl_audit_start(int type,
+					struct netlbl_audit *audit_info);
 #else
 static inline int netlbl_cfg_map_del(const char *domain,
+				     u16 family,
+				     const void *addr,
+				     const void *mask,
 				     struct netlbl_audit *audit_info)
 {
 	return -ENOSYS;
 }
-static inline int netlbl_cfg_unlbl_add_map(const char *domain,
+static inline int netlbl_cfg_unlbl_map_add(const char *domain,
+					   u16 family,
+					   void *addr,
+					   void *mask,
 					   struct netlbl_audit *audit_info)
 {
 	return -ENOSYS;
 }
-static inline int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+static inline int netlbl_cfg_unlbl_static_add(struct net *net,
+					      const char *dev_name,
+					      const void *addr,
+					      const void *mask,
+					      u16 family,
+					      u32 secid,
+					      struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
+static inline int netlbl_cfg_unlbl_static_del(struct net *net,
+					      const char *dev_name,
+					      const void *addr,
+					      const void *mask,
+					      u16 family,
+					      struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
+static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+					 struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
+static inline void netlbl_cfg_cipsov4_del(u32 doi,
+					  struct netlbl_audit *audit_info)
+{
+	return;
+}
+static inline int netlbl_cfg_cipsov4_map_add(u32 doi,
 					     const char *domain,
+					     const struct in_addr *addr,
+					     const struct in_addr *mask,
 					     struct netlbl_audit *audit_info)
 {
 	return -ENOSYS;
@@ -495,6 +564,11 @@ static inline int netlbl_cache_add(const struct sk_buff *skb,
 {
 	return 0;
 }
+static inline struct audit_buffer *netlbl_audit_start(int type,
+						struct netlbl_audit *audit_info)
+{
+	return NULL;
+}
 #endif /* CONFIG_NETLABEL */
 
 #endif /* _NETLABEL_H */

net/ipv4/cipso_ipv4.c

@@ -38,6 +38,7 @@
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/jhash.h>
+#include <linux/audit.h>
 #include <net/ip.h>
 #include <net/icmp.h>
 #include <net/tcp.h>
@@ -449,6 +450,7 @@ static struct cipso_v4_doi *cipso_v4_doi_search(u32 doi)
 /**
  * cipso_v4_doi_add - Add a new DOI to the CIPSO protocol engine
  * @doi_def: the DOI structure
+ * @audit_info: NetLabel audit information
  *
  * Description:
  * The caller defines a new DOI for use by the CIPSO engine and calls this
@@ -458,50 +460,78 @@ static struct cipso_v4_doi *cipso_v4_doi_search(u32 doi)
  * zero on success and non-zero on failure.
  *
  */
-int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
+int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
+		     struct netlbl_audit *audit_info)
 {
+	int ret_val = -EINVAL;
 	u32 iter;
+	u32 doi;
+	u32 doi_type;
+	struct audit_buffer *audit_buf;
+
+	doi = doi_def->doi;
+	doi_type = doi_def->type;
 
 	if (doi_def == NULL || doi_def->doi == CIPSO_V4_DOI_UNKNOWN)
-		return -EINVAL;
+		goto doi_add_return;
 	for (iter = 0; iter < CIPSO_V4_TAG_MAXCNT; iter++) {
 		switch (doi_def->tags[iter]) {
 		case CIPSO_V4_TAG_RBITMAP:
 			break;
 		case CIPSO_V4_TAG_RANGE:
-			if (doi_def->type != CIPSO_V4_MAP_PASS)
-				return -EINVAL;
-			break;
-		case CIPSO_V4_TAG_INVALID:
-			if (iter == 0)
-				return -EINVAL;
-			break;
 		case CIPSO_V4_TAG_ENUM:
 			if (doi_def->type != CIPSO_V4_MAP_PASS)
-				return -EINVAL;
+				goto doi_add_return;
 			break;
 		case CIPSO_V4_TAG_LOCAL:
 			if (doi_def->type != CIPSO_V4_MAP_LOCAL)
-				return -EINVAL;
+				goto doi_add_return;
+			break;
+		case CIPSO_V4_TAG_INVALID:
+			if (iter == 0)
+				goto doi_add_return;
 			break;
 		default:
-			return -EINVAL;
+			goto doi_add_return;
 		}
 	}
 
 	atomic_set(&doi_def->refcount, 1);
 
 	spin_lock(&cipso_v4_doi_list_lock);
-	if (cipso_v4_doi_search(doi_def->doi) != NULL)
+	if (cipso_v4_doi_search(doi_def->doi) != NULL) {
-		goto doi_add_failure;
+		spin_unlock(&cipso_v4_doi_list_lock);
+		ret_val = -EEXIST;
+		goto doi_add_return;
+	}
 	list_add_tail_rcu(&doi_def->list, &cipso_v4_doi_list);
 	spin_unlock(&cipso_v4_doi_list_lock);
+	ret_val = 0;
 
-	return 0;
+doi_add_return:
+	audit_buf = netlbl_audit_start(AUDIT_MAC_CIPSOV4_ADD, audit_info);
+	if (audit_buf != NULL) {
+		const char *type_str;
+		switch (doi_type) {
+		case CIPSO_V4_MAP_TRANS:
+			type_str = "trans";
+			break;
+		case CIPSO_V4_MAP_PASS:
+			type_str = "pass";
+			break;
+		case CIPSO_V4_MAP_LOCAL:
+			type_str = "local";
+			break;
+		default:
+			type_str = "(unknown)";
+		}
+		audit_log_format(audit_buf,
+				 " cipso_doi=%u cipso_type=%s res=%u",
+				 doi, type_str, ret_val == 0 ? 1 : 0);
+		audit_log_end(audit_buf);
+	}
 
-doi_add_failure:
+	return ret_val;
-	spin_unlock(&cipso_v4_doi_list_lock);
-	return -EEXIST;
 }
 
 /**
@@ -559,25 +589,39 @@ static void cipso_v4_doi_free_rcu(struct rcu_head *entry)
  */
 int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info)
 {
+	int ret_val;
 	struct cipso_v4_doi *doi_def;
+	struct audit_buffer *audit_buf;
 
 	spin_lock(&cipso_v4_doi_list_lock);
 	doi_def = cipso_v4_doi_search(doi);
 	if (doi_def == NULL) {
 		spin_unlock(&cipso_v4_doi_list_lock);
-		return -ENOENT;
+		ret_val = -ENOENT;
+		goto doi_remove_return;
 	}
 	if (!atomic_dec_and_test(&doi_def->refcount)) {
 		spin_unlock(&cipso_v4_doi_list_lock);
-		return -EBUSY;
+		ret_val = -EBUSY;
+		goto doi_remove_return;
 	}
 	list_del_rcu(&doi_def->list);
 	spin_unlock(&cipso_v4_doi_list_lock);
 
 	cipso_v4_cache_invalidate();
 	call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
+	ret_val = 0;
 
-	return 0;
+doi_remove_return:
+	audit_buf = netlbl_audit_start(AUDIT_MAC_CIPSOV4_DEL, audit_info);
+	if (audit_buf != NULL) {
+		audit_log_format(audit_buf,
+				 " cipso_doi=%u res=%u",
+				 doi, ret_val == 0 ? 1 : 0);
+		audit_log_end(audit_buf);
+	}
+
+	return ret_val;
 }
 
 /**

net/netlabel/netlabel_cipso_v4.c

@@ -130,6 +130,7 @@ static int netlbl_cipsov4_add_common(struct genl_info *info,
 /**
  * netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
  * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
  *
  * Description:
  * Create a new CIPSO_V4_MAP_TRANS DOI definition based on the given ADD
@@ -137,7 +138,8 @@ static int netlbl_cipsov4_add_common(struct genl_info *info,
  * non-zero on error.
  *
  */
-static int netlbl_cipsov4_add_std(struct genl_info *info)
+static int netlbl_cipsov4_add_std(struct genl_info *info,
+				  struct netlbl_audit *audit_info)
 {
 	int ret_val = -EINVAL;
 	struct cipso_v4_doi *doi_def = NULL;
@@ -316,7 +318,7 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
 			}
 	}
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
 	if (ret_val != 0)
 		goto add_std_failure;
 	return 0;
@@ -330,6 +332,7 @@ add_std_failure:
 /**
  * netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
  * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
  *
  * Description:
  * Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
@@ -337,7 +340,8 @@ add_std_failure:
  * error.
  *
  */
-static int netlbl_cipsov4_add_pass(struct genl_info *info)
+static int netlbl_cipsov4_add_pass(struct genl_info *info,
+				   struct netlbl_audit *audit_info)
 {
 	int ret_val;
 	struct cipso_v4_doi *doi_def = NULL;
@@ -354,7 +358,7 @@ static int netlbl_cipsov4_add_pass(struct genl_info *info)
 	if (ret_val != 0)
 		goto add_pass_failure;
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
 	if (ret_val != 0)
 		goto add_pass_failure;
 	return 0;
@@ -367,6 +371,7 @@ add_pass_failure:
 /**
  * netlbl_cipsov4_add_local - Adds a CIPSO V4 DOI definition
  * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
  *
  * Description:
  * Create a new CIPSO_V4_MAP_LOCAL DOI definition based on the given ADD
@@ -374,7 +379,8 @@ add_pass_failure:
  * non-zero on error.
  *
  */
-static int netlbl_cipsov4_add_local(struct genl_info *info)
+static int netlbl_cipsov4_add_local(struct genl_info *info,
+				    struct netlbl_audit *audit_info)
 {
 	int ret_val;
 	struct cipso_v4_doi *doi_def = NULL;
@@ -391,7 +397,7 @@ static int netlbl_cipsov4_add_local(struct genl_info *info)
 	if (ret_val != 0)
 		goto add_local_failure;
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
 	if (ret_val != 0)
 		goto add_local_failure;
 	return 0;
@@ -415,48 +421,31 @@ static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
 
 {
 	int ret_val = -EINVAL;
-	u32 type;
-	u32 doi;
 	const char *type_str = "(unknown)";
-	struct audit_buffer *audit_buf;
 	struct netlbl_audit audit_info;
 
 	if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
 	    !info->attrs[NLBL_CIPSOV4_A_MTYPE])
 		return -EINVAL;
 
-	doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
 	netlbl_netlink_auditinfo(skb, &audit_info);
-
+	switch (nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE])) {
-	type = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE]);
-	switch (type) {
 	case CIPSO_V4_MAP_TRANS:
 		type_str = "trans";
-		ret_val = netlbl_cipsov4_add_std(info);
+		ret_val = netlbl_cipsov4_add_std(info, &audit_info);
 		break;
 	case CIPSO_V4_MAP_PASS:
 		type_str = "pass";
-		ret_val = netlbl_cipsov4_add_pass(info);
+		ret_val = netlbl_cipsov4_add_pass(info, &audit_info);
 		break;
 	case CIPSO_V4_MAP_LOCAL:
 		type_str = "local";
-		ret_val = netlbl_cipsov4_add_local(info);
+		ret_val = netlbl_cipsov4_add_local(info, &audit_info);
 		break;
 	}
 	if (ret_val == 0)
 		atomic_inc(&netlabel_mgmt_protocount);
 
-	audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
-					      &audit_info);
-	if (audit_buf != NULL) {
-		audit_log_format(audit_buf,
-				 " cipso_doi=%u cipso_type=%s res=%u",
-				 doi,
-				 type_str,
-				 ret_val == 0 ? 1 : 0);
-		audit_log_end(audit_buf);
-	}
-
 	return ret_val;
 }
 
@@ -725,9 +714,7 @@ static int netlbl_cipsov4_remove_cb(struct netlbl_dom_map *entry, void *arg)
 static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
 {
 	int ret_val = -EINVAL;
-	u32 doi = 0;
 	struct netlbl_domhsh_walk_arg cb_arg;
-	struct audit_buffer *audit_buf;
 	struct netlbl_audit audit_info;
 	u32 skip_bkt = 0;
 	u32 skip_chain = 0;
@@ -735,29 +722,17 @@ static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
 	if (!info->attrs[NLBL_CIPSOV4_A_DOI])
 		return -EINVAL;
 
-	doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
 	netlbl_netlink_auditinfo(skb, &audit_info);
-
+	cb_arg.doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
-	cb_arg.doi = doi;
 	cb_arg.audit_info = &audit_info;
 	ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
 				     netlbl_cipsov4_remove_cb, &cb_arg);
 	if (ret_val == 0 || ret_val == -ENOENT) {
-		ret_val = cipso_v4_doi_remove(doi, &audit_info);
+		ret_val = cipso_v4_doi_remove(cb_arg.doi, &audit_info);
 		if (ret_val == 0)
 			atomic_dec(&netlabel_mgmt_protocount);
 	}
 
-	audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_DEL,
-					      &audit_info);
-	if (audit_buf != NULL) {
-		audit_log_format(audit_buf,
-				 " cipso_doi=%u res=%u",
-				 doi,
-				 ret_val == 0 ? 1 : 0);
-		audit_log_end(audit_buf);
-	}
-
 	return ret_val;
 }
 

net/netlabel/netlabel_domainhash.c

@@ -482,6 +482,73 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 	return ret_val;
 }
 
+/**
+ * netlbl_domhsh_remove_af4 - Removes an address selector entry
+ * @domain: the domain
+ * @addr: IPv4 address
+ * @mask: IPv4 address mask
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes an individual address selector from a domain mapping and potentially
+ * the entire mapping if it is empty.  Returns zero on success, negative values
+ * on failure.
+ *
+ */
+int netlbl_domhsh_remove_af4(const char *domain,
+			     const struct in_addr *addr,
+			     const struct in_addr *mask,
+			     struct netlbl_audit *audit_info)
+{
+	struct netlbl_dom_map *entry_map;
+	struct netlbl_af4list *entry_addr;
+	struct netlbl_af4list *iter4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct netlbl_af6list *iter6;
+#endif /* IPv6 */
+	struct netlbl_domaddr4_map *entry;
+
+	rcu_read_lock();
+
+	if (domain)
+		entry_map = netlbl_domhsh_search(domain);
+	else
+		entry_map = netlbl_domhsh_search_def(domain);
+	if (entry_map == NULL || entry_map->type != NETLBL_NLTYPE_ADDRSELECT)
+		goto remove_af4_failure;
+
+	spin_lock(&netlbl_domhsh_lock);
+	entry_addr = netlbl_af4list_remove(addr->s_addr, mask->s_addr,
+					   &entry_map->type_def.addrsel->list4);
+	spin_unlock(&netlbl_domhsh_lock);
+
+	if (entry_addr == NULL)
+		goto remove_af4_failure;
+	netlbl_af4list_foreach_rcu(iter4, &entry_map->type_def.addrsel->list4)
+		goto remove_af4_single_addr;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	netlbl_af6list_foreach_rcu(iter6, &entry_map->type_def.addrsel->list6)
+		goto remove_af4_single_addr;
+#endif /* IPv6 */
+	/* the domain mapping is empty so remove it from the mapping table */
+	netlbl_domhsh_remove_entry(entry_map, audit_info);
+
+remove_af4_single_addr:
+	rcu_read_unlock();
+	/* yick, we can't use call_rcu here because we don't have a rcu head
+	 * pointer but hopefully this should be a rare case so the pause
+	 * shouldn't be a problem */
+	synchronize_rcu();
+	entry = netlbl_domhsh_addr4_entry(entry_addr);
+	cipso_v4_doi_putdef(entry->type_def.cipsov4);
+	kfree(entry);
+	return 0;
+
+remove_af4_failure:
+	rcu_read_unlock();
+	return -ENOENT;
+}
+
 /**
  * netlbl_domhsh_remove - Removes an entry from the domain hash table
  * @domain: the domain to remove

net/netlabel/netlabel_domainhash.h

@@ -90,6 +90,10 @@ int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
 			      struct netlbl_audit *audit_info);
 int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 			       struct netlbl_audit *audit_info);
+int netlbl_domhsh_remove_af4(const char *domain,
+			     const struct in_addr *addr,
+			     const struct in_addr *mask,
+			     struct netlbl_audit *audit_info);
 int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
 int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
 struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);

net/netlabel/netlabel_kapi.c

@@ -31,7 +31,10 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/audit.h>
+#include <linux/in.h>
+#include <linux/in6.h>
 #include <net/ip.h>
+#include <net/ipv6.h>
 #include <net/netlabel.h>
 #include <net/cipso_ipv4.h>
 #include <asm/bug.h>
@@ -42,6 +45,7 @@
 #include "netlabel_cipso_v4.h"
 #include "netlabel_user.h"
 #include "netlabel_mgmt.h"
+#include "netlabel_addrlist.h"
 
 /*
  * Configuration Functions
@@ -50,6 +54,9 @@
 /**
  * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
  * @domain: the domain mapping to remove
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
  * @audit_info: NetLabel audit information
  *
  * Description:
@@ -58,14 +65,32 @@
  * values on failure.
  *
  */
-int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info)
+int netlbl_cfg_map_del(const char *domain,
+		       u16 family,
+		       const void *addr,
+		       const void *mask,
+		       struct netlbl_audit *audit_info)
 {
-	return netlbl_domhsh_remove(domain, audit_info);
+	if (addr == NULL && mask == NULL) {
+		return netlbl_domhsh_remove(domain, audit_info);
+	} else if (addr != NULL && mask != NULL) {
+		switch (family) {
+		case AF_INET:
+			return netlbl_domhsh_remove_af4(domain, addr, mask,
+							audit_info);
+		default:
+			return -EPFNOSUPPORT;
+		}
+	} else
+		return -EINVAL;
 }
 
 /**
- * netlbl_cfg_unlbl_add_map - Add an unlabeled NetLabel/LSM domain mapping
+ * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
  * @domain: the domain mapping to add
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
  * @audit_info: NetLabel audit information
  *
  * Description:
@@ -74,11 +99,19 @@ int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info)
  * negative values on failure.
  *
  */
-int netlbl_cfg_unlbl_add_map(const char *domain,
+int netlbl_cfg_unlbl_map_add(const char *domain,
+			     u16 family,
+			     const void *addr,
+			     const void *mask,
 			     struct netlbl_audit *audit_info)
 {
 	int ret_val = -ENOMEM;
 	struct netlbl_dom_map *entry;
+	struct netlbl_domaddr_map *addrmap = NULL;
+	struct netlbl_domaddr4_map *map4 = NULL;
+	struct netlbl_domaddr6_map *map6 = NULL;
+	const struct in_addr *addr4, *mask4;
+	const struct in6_addr *addr6, *mask6;
 
 	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 	if (entry == NULL)
@@ -86,49 +119,225 @@ int netlbl_cfg_unlbl_add_map(const char *domain,
 	if (domain != NULL) {
 		entry->domain = kstrdup(domain, GFP_ATOMIC);
 		if (entry->domain == NULL)
-			goto cfg_unlbl_add_map_failure;
+			goto cfg_unlbl_map_add_failure;
+	}
+
+	if (addr == NULL && mask == NULL)
+		entry->type = NETLBL_NLTYPE_UNLABELED;
+	else if (addr != NULL && mask != NULL) {
+		addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
+		if (addrmap == NULL)
+			goto cfg_unlbl_map_add_failure;
+		INIT_LIST_HEAD(&addrmap->list4);
+		INIT_LIST_HEAD(&addrmap->list6);
+
+		switch (family) {
+		case AF_INET:
+			addr4 = addr;
+			mask4 = mask;
+			map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
+			if (map4 == NULL)
+				goto cfg_unlbl_map_add_failure;
+			map4->type = NETLBL_NLTYPE_UNLABELED;
+			map4->list.addr = addr4->s_addr & mask4->s_addr;
+			map4->list.mask = mask4->s_addr;
+			map4->list.valid = 1;
+			ret_val = netlbl_af4list_add(&map4->list,
+						     &addrmap->list4);
+			if (ret_val != 0)
+				goto cfg_unlbl_map_add_failure;
+			break;
+		case AF_INET6:
+			addr6 = addr;
+			mask6 = mask;
+			map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
+			if (map4 == NULL)
+				goto cfg_unlbl_map_add_failure;
+			map6->type = NETLBL_NLTYPE_UNLABELED;
+			ipv6_addr_copy(&map6->list.addr, addr6);
+			map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
+			map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
+			map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
+			map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
+			ipv6_addr_copy(&map6->list.mask, mask6);
+			map6->list.valid = 1;
+			ret_val = netlbl_af4list_add(&map4->list,
+						     &addrmap->list4);
+			if (ret_val != 0)
+				goto cfg_unlbl_map_add_failure;
+			break;
+		default:
+			goto cfg_unlbl_map_add_failure;
+			break;
+		}
+
+		entry->type_def.addrsel = addrmap;
+		entry->type = NETLBL_NLTYPE_ADDRSELECT;
+	} else {
+		ret_val = -EINVAL;
+		goto cfg_unlbl_map_add_failure;
 	}
-	entry->type = NETLBL_NLTYPE_UNLABELED;
 
 	ret_val = netlbl_domhsh_add(entry, audit_info);
 	if (ret_val != 0)
-		goto cfg_unlbl_add_map_failure;
+		goto cfg_unlbl_map_add_failure;
 
 	return 0;
 
-cfg_unlbl_add_map_failure:
+cfg_unlbl_map_add_failure:
 	if (entry != NULL)
 		kfree(entry->domain);
 	kfree(entry);
+	kfree(addrmap);
+	kfree(map4);
+	kfree(map6);
 	return ret_val;
 }
 
+
 /**
- * netlbl_cfg_cipsov4_add_map - Add a new CIPSOv4 DOI definition and mapping
+ * netlbl_cfg_unlbl_static_add - Adds a new static label
- * @doi_def: the DOI definition
+ * @net: network namespace
- * @domain: the domain mapping to add
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
  * @audit_info: NetLabel audit information
  *
  * Description:
- * Add a new CIPSOv4 DOI definition and NetLabel/LSM domain mapping for this
+ * Adds a new NetLabel static label to be used when protocol provided labels
- * new DOI definition to the NetLabel subsystem.  A @domain value of NULL adds
+ * are not present on incoming traffic.  If @dev_name is NULL then the default
- * a new default domain mapping.  Returns zero on success, negative values on
+ * interface will be used.  Returns zero on success, negative values on failure.
- * failure.
  *
  */
-int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+int netlbl_cfg_unlbl_static_add(struct net *net,
+				const char *dev_name,
+				const void *addr,
+				const void *mask,
+				u16 family,
+				u32 secid,
+				struct netlbl_audit *audit_info)
+{
+	u32 addr_len;
+
+	switch (family) {
+	case AF_INET:
+		addr_len = sizeof(struct in_addr);
+		break;
+	case AF_INET6:
+		addr_len = sizeof(struct in6_addr);
+		break;
+	default:
+		return -EPFNOSUPPORT;
+	}
+
+	return netlbl_unlhsh_add(net,
+				 dev_name, addr, mask, addr_len,
+				 secid, audit_info);
+}
+
+/**
+ * netlbl_cfg_unlbl_static_del - Removes an existing static label
+ * @net: network namespace
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes an existing NetLabel static label used when protocol provided labels
+ * are not present on incoming traffic.  If @dev_name is NULL then the default
+ * interface will be used.  Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_static_del(struct net *net,
+				const char *dev_name,
+				const void *addr,
+				const void *mask,
+				u16 family,
+				struct netlbl_audit *audit_info)
+{
+	u32 addr_len;
+
+	switch (family) {
+	case AF_INET:
+		addr_len = sizeof(struct in_addr);
+		break;
+	case AF_INET6:
+		addr_len = sizeof(struct in6_addr);
+		break;
+	default:
+		return -EPFNOSUPPORT;
+	}
+
+	return netlbl_unlhsh_remove(net,
+				    dev_name, addr, mask, addr_len,
+				    audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
+ * @doi_def: CIPSO DOI definition
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Add a new CIPSO DOI definition as defined by @doi_def.  Returns zero on
+ * success and negative values on failure.
+ *
+ */
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+			   struct netlbl_audit *audit_info)
+{
+	return cipso_v4_doi_add(doi_def, audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
+ * @doi: CIPSO DOI
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Remove an existing CIPSO DOI definition matching @doi.  Returns zero on
+ * success and negative values on failure.
+ *
+ */
+void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
+{
+	cipso_v4_doi_remove(doi, audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
+ * @doi: the CIPSO DOI
+ * @domain: the domain mapping to add
+ * @addr: IP address
+ * @mask: IP address mask
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
+ * subsystem.  A @domain value of NULL adds a new default domain mapping.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_cipsov4_map_add(u32 doi,
 			       const char *domain,
+			       const struct in_addr *addr,
+			       const struct in_addr *mask,
 			       struct netlbl_audit *audit_info)
 {
 	int ret_val = -ENOMEM;
-	u32 doi;
+	struct cipso_v4_doi *doi_def;
-	u32 doi_type;
 	struct netlbl_dom_map *entry;
-	const char *type_str;
+	struct netlbl_domaddr_map *addrmap = NULL;
-	struct audit_buffer *audit_buf;
+	struct netlbl_domaddr4_map *addrinfo = NULL;
 
-	doi = doi_def->doi;
+	doi_def = cipso_v4_doi_getdef(doi);
-	doi_type = doi_def->type;
+	if (doi_def == NULL)
+		return -ENOENT;
 
 	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 	if (entry == NULL)
@@ -136,56 +345,52 @@ int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
 	if (domain != NULL) {
 		entry->domain = kstrdup(domain, GFP_ATOMIC);
 		if (entry->domain == NULL)
-			goto cfg_cipsov4_add_map_failure;
+			goto cfg_cipsov4_map_add_failure;
 	}
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	if (addr == NULL && mask == NULL) {
-	if (ret_val != 0)
+		entry->type_def.cipsov4 = doi_def;
-		goto cfg_cipsov4_add_map_failure_remove_doi;
+		entry->type = NETLBL_NLTYPE_CIPSOV4;
-	entry->type = NETLBL_NLTYPE_CIPSOV4;
+	} else if (addr != NULL && mask != NULL) {
-	entry->type_def.cipsov4 = cipso_v4_doi_getdef(doi);
+		addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
-	if (entry->type_def.cipsov4 == NULL) {
+		if (addrmap == NULL)
-		ret_val = -ENOENT;
+			goto cfg_cipsov4_map_add_failure;
-		goto cfg_cipsov4_add_map_failure_remove_doi;
+		INIT_LIST_HEAD(&addrmap->list4);
+		INIT_LIST_HEAD(&addrmap->list6);
+
+		addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
+		if (addrinfo == NULL)
+			goto cfg_cipsov4_map_add_failure;
+		addrinfo->type_def.cipsov4 = doi_def;
+		addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
+		addrinfo->list.addr = addr->s_addr & mask->s_addr;
+		addrinfo->list.mask = mask->s_addr;
+		addrinfo->list.valid = 1;
+		ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
+		if (ret_val != 0)
+			goto cfg_cipsov4_map_add_failure;
+
+		entry->type_def.addrsel = addrmap;
+		entry->type = NETLBL_NLTYPE_ADDRSELECT;
+	} else {
+		ret_val = -EINVAL;
+		goto cfg_cipsov4_map_add_failure;
 	}
+
 	ret_val = netlbl_domhsh_add(entry, audit_info);
 	if (ret_val != 0)
-		goto cfg_cipsov4_add_map_failure_release_doi;
+		goto cfg_cipsov4_map_add_failure;
 
-cfg_cipsov4_add_map_return:
+	return 0;
-	audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
-					      audit_info);
-	if (audit_buf != NULL) {
-		switch (doi_type) {
-		case CIPSO_V4_MAP_TRANS:
-			type_str = "trans";
-			break;
-		case CIPSO_V4_MAP_PASS:
-			type_str = "pass";
-			break;
-		case CIPSO_V4_MAP_LOCAL:
-			type_str = "local";
-			break;
-		default:
-			type_str = "(unknown)";
-		}
-		audit_log_format(audit_buf,
-				 " cipso_doi=%u cipso_type=%s res=%u",
-				 doi, type_str, ret_val == 0 ? 1 : 0);
-		audit_log_end(audit_buf);
-	}
 
-	return ret_val;
+cfg_cipsov4_map_add_failure:
-
-cfg_cipsov4_add_map_failure_release_doi:
 	cipso_v4_doi_putdef(doi_def);
-cfg_cipsov4_add_map_failure_remove_doi:
-	cipso_v4_doi_remove(doi, audit_info);
-cfg_cipsov4_add_map_failure:
 	if (entry != NULL)
 		kfree(entry->domain);
 	kfree(entry);
-	goto cfg_cipsov4_add_map_return;
+	kfree(addrmap);
+	kfree(addrinfo);
+	return ret_val;
 }
 
 /*
@@ -690,6 +895,28 @@ int netlbl_cache_add(const struct sk_buff *skb,
 	return -ENOMSG;
 }
 
+/*
+ * Protocol Engine Functions
+ */
+
+/**
+ * netlbl_audit_start - Start an audit message
+ * @type: audit message type
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Start an audit message using the type specified in @type and fill the audit
+ * message with some fields common to all NetLabel audit messages.  This
+ * function should only be used by protocol engines, not LSMs.  Returns a
+ * pointer to the audit buffer on success, NULL on failure.
+ *
+ */
+struct audit_buffer *netlbl_audit_start(int type,
+					struct netlbl_audit *audit_info)
+{
+	return netlbl_audit_start_common(type, audit_info);
+}
+
 /*
  * Setup Functions
  */

net/netlabel/netlabel_unlabeled.c

@@ -450,13 +450,13 @@ add_iface_failure:
  * success, negative values on failure.
  *
  */
-static int netlbl_unlhsh_add(struct net *net,
+int netlbl_unlhsh_add(struct net *net,
-			     const char *dev_name,
+		      const char *dev_name,
-			     const void *addr,
+		      const void *addr,
-			     const void *mask,
+		      const void *mask,
-			     u32 addr_len,
+		      u32 addr_len,
-			     u32 secid,
+		      u32 secid,
-			     struct netlbl_audit *audit_info)
+		      struct netlbl_audit *audit_info)
 {
 	int ret_val;
 	int ifindex;
@@ -720,12 +720,12 @@ unlhsh_condremove_failure:
  * Returns zero on success, negative values on failure.
  *
  */
-static int netlbl_unlhsh_remove(struct net *net,
+int netlbl_unlhsh_remove(struct net *net,
-				const char *dev_name,
+			 const char *dev_name,
-				const void *addr,
+			 const void *addr,
-				const void *mask,
+			 const void *mask,
-				u32 addr_len,
+			 u32 addr_len,
-				struct netlbl_audit *audit_info)
+			 struct netlbl_audit *audit_info)
 {
 	int ret_val;
 	struct net_device *dev;

net/netlabel/netlabel_unlabeled.h

@@ -221,6 +221,21 @@ int netlbl_unlabel_genl_init(void);
 /* General Unlabeled init function */
 int netlbl_unlabel_init(u32 size);
 
+/* Static/Fallback label management functions */
+int netlbl_unlhsh_add(struct net *net,
+		      const char *dev_name,
+		      const void *addr,
+		      const void *mask,
+		      u32 addr_len,
+		      u32 secid,
+		      struct netlbl_audit *audit_info);
+int netlbl_unlhsh_remove(struct net *net,
+			 const char *dev_name,
+			 const void *addr,
+			 const void *mask,
+			 u32 addr_len,
+			 struct netlbl_audit *audit_info);
+
 /* Process Unlabeled incoming network packets */
 int netlbl_unlabel_getattr(const struct sk_buff *skb,
 			   u16 family,

security/smack/smackfs.c

@@ -350,7 +350,7 @@ static void smk_cipso_doi(void)
 	audit_info.sessionid = audit_get_sessionid(current);
 	audit_info.secid = smack_to_secid(current_security());
 
-	rc = netlbl_cfg_map_del(NULL, &audit_info);
+	rc = netlbl_cfg_map_del(NULL, PF_UNSPEC, NULL, NULL, &audit_info);
 	if (rc != 0)
 		printk(KERN_WARNING "%s:%d remove rc = %d\n",
 		       __func__, __LINE__, rc);
@@ -365,11 +365,20 @@ static void smk_cipso_doi(void)
 	for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
 		doip->tags[rc] = CIPSO_V4_TAG_INVALID;
 
-	rc = netlbl_cfg_cipsov4_add_map(doip, NULL, &audit_info);
+	rc = netlbl_cfg_cipsov4_add(doip, &audit_info);
 	if (rc != 0) {
-		printk(KERN_WARNING "%s:%d add rc = %d\n",
+		printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
 		       __func__, __LINE__, rc);
 		kfree(doip);
+		return;
+	}
+	rc = netlbl_cfg_cipsov4_map_add(doip->doi,
+					NULL, NULL, NULL, &audit_info);
+	if (rc != 0) {
+		printk(KERN_WARNING "%s:%d map add rc = %d\n",
+		       __func__, __LINE__, rc);
+		kfree(doip);
+		return;
 	}
 }
 
@@ -386,13 +395,15 @@ static void smk_unlbl_ambient(char *oldambient)
 	audit_info.secid = smack_to_secid(current_security());
 
 	if (oldambient != NULL) {
-		rc = netlbl_cfg_map_del(oldambient, &audit_info);
+		rc = netlbl_cfg_map_del(oldambient,
+					PF_UNSPEC, NULL, NULL, &audit_info);
 		if (rc != 0)
 			printk(KERN_WARNING "%s:%d remove rc = %d\n",
 			       __func__, __LINE__, rc);
 	}
 
-	rc = netlbl_cfg_unlbl_add_map(smack_net_ambient, &audit_info);
+	rc = netlbl_cfg_unlbl_map_add(smack_net_ambient,
+				      PF_INET, NULL, NULL, &audit_info);
 	if (rc != 0)
 		printk(KERN_WARNING "%s:%d add rc = %d\n",
 		       __func__, __LINE__, rc);