Introduce a new kernel configuration API for NetLabel - for Smack Version 5

PATCH New Casey Schaufler 1 participant 1 message Oct 8, 2007

Subsystems (2)

Networking Labeled networking (NetLabel)

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Casey Schaufler

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2007-10-08 23:05 UTC #0 lore raw

PATCH 1/1 Introduce a new kernel configuration API for NetLabel - for Smack Version 5

From: Paul Moore <[email protected]>

Add a new set of configuration functions to the NetLabel/LSM API so that LSMs can perform their own configuration of the NetLabel subsystem without relying on assistance from userspace.

Signed-off-by Paul Moore <[email protected]>

---

This update fixes a memory leak on error conditions.

 include/net/netlabel.h             |   47 ++++++++--
 net/ipv4/cipso_ipv4.c              |    4 -
 net/netlabel/netlabel_cipso_v4.c   |    2 
 net/netlabel/netlabel_cipso_v4.h   |    3 +
 net/netlabel/netlabel_domainhash.h |    1 
 net/netlabel/netlabel_kapi.c       |  177 ++++++++++++++++++++++++++++++++++++
 6 files changed, 225 insertions(+), 9 deletions(-)

include/net/netlabel.h +41 -6

index 2e5b2f6..facaf68 100644
@@ -36,6 +36,8 @@
 #include <net/netlink.h>
 #include <asm/atomic.h>
 
+struct cipso_v4_doi;
+
 /*
  * NetLabel - A management interface for maintaining network packet label
  *            mapping tables for explicit packet labling protocols.

@@ -99,12 +101,6 @@ struct netlbl_audit {
 	uid_t loginuid;
 };
 
-/* Domain mapping definition struct */
-struct netlbl_dom_map;
-
-/* Domain mapping operations */
-int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
-
 /* LSM security attributes */
 struct netlbl_lsm_cache {
 	atomic_t refcount;

@@ -285,6 +281,19 @@ static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
 
 #ifdef CONFIG_NETLABEL
 /*
+ * LSM configuration operations
+ */
+int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_add_map(const char *domain,
+			     struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+			   struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+			       const char *domain,
+			       struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
+
+/*
  * LSM security attribute operations
  */
 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,

@@ -318,6 +327,32 @@ void netlbl_cache_invalidate(void);
 int netlbl_cache_add(const struct sk_buff *skb,
 		     const struct netlbl_lsm_secattr *secattr);
 #else
+static inline int netlbl_cfg_map_del(const char *domain,
+				     struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
+static inline int netlbl_cfg_unlbl_add_map(const char *domain,
+					   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 int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+					     const char *domain,
+					     struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
+static inline int netlbl_cfg_cipsov4_del(u32 doi,
+					 struct netlbl_audit *audit_info)
+{
+	return -ENOSYS;
+}
 static inline int netlbl_secattr_catmap_walk(
 	                              struct netlbl_lsm_secattr_catmap *catmap,
 				      u32 offset)

net/ipv4/cipso_ipv4.c +2 -2

index ab56a05..714461c 100644
@@ -557,8 +557,8 @@ int cipso_v4_doi_remove(u32 doi,
 		spin_unlock(&cipso_v4_doi_list_lock);
 		list_for_each_entry_rcu(dom_iter, &doi_def->dom_list, list)
 			if (dom_iter->valid)
-				netlbl_domhsh_remove(dom_iter->domain,
-						     audit_info);
+				netlbl_cfg_map_del(dom_iter->domain,
+						   audit_info);
 		cipso_v4_cache_invalidate();
 		rcu_read_unlock();

net/netlabel/netlabel_cipso_v4.c +1 -1

index c060e3f..07f7fd4 100644
@@ -89,7 +89,7 @@ static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1
  * safely.
  *
  */
-static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
+void netlbl_cipsov4_doi_free(struct rcu_head *entry)
 {
 	struct cipso_v4_doi *ptr;

net/netlabel/netlabel_cipso_v4.h +3 -0

index f03cf9b..220cb9d 100644
@@ -163,4 +163,7 @@ enum {
 /* NetLabel protocol functions */
 int netlbl_cipsov4_genl_init(void);
 
+/* Free the memory associated with a CIPSOv4 DOI definition */
+void netlbl_cipsov4_doi_free(struct rcu_head *entry);
+
 #endif

net/netlabel/netlabel_domainhash.h +1 -0

index 3689956..8220990 100644
@@ -61,6 +61,7 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
 		      struct netlbl_audit *audit_info);
 int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
 			      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);
 int netlbl_domhsh_walk(u32 *skip_bkt,

net/netlabel/netlabel_kapi.c +177 -0

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