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>

1 files changed, 65 insertions, 21 deletions

diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index e52799047a5f..6bb2635b5ded 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/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)
-                goto doi_add_failure;
+        if (cipso_v4_doi_search(doi_def->doi) != NULL) {
+                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:
-        spin_unlock(&cipso_v4_doi_list_lock);
-        return -EEXIST;
+        return ret_val;
 }
 
 /**
@@ -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;
+
+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 0;
+        return ret_val;
 }
 
 /**