audit: Add auditing to ipsec

An audit message occurs when an ipsec SA
or ipsec policy is created/deleted.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 2 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index a14c88bf17f0..d5d3a6f1f609 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/cache.h>
 #include <asm/uaccess.h>
+#include <linux/audit.h>
 
 #include "xfrm_hash.h"
 
@@ -238,6 +239,7 @@ static void xfrm_timer_handler(unsigned long data)
         unsigned long now = (unsigned long)xtime.tv_sec;
         long next = LONG_MAX;
         int warn = 0;
+        int err = 0;
 
         spin_lock(&x->lock);
         if (x->km.state == XFRM_STATE_DEAD)
@@ -295,9 +297,14 @@ expired:
                 next = 2;
                 goto resched;
         }
-        if (!__xfrm_state_delete(x) && x->id.spi)
+
+        err = __xfrm_state_delete(x);
+        if (!err && x->id.spi)
                 km_state_expired(x, 1, 0);
 
+        xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
+                       AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
+
 out:
         spin_unlock(&x->lock);
 }
@@ -384,9 +391,10 @@ int xfrm_state_delete(struct xfrm_state *x)
 }
 EXPORT_SYMBOL(xfrm_state_delete);
 
-void xfrm_state_flush(u8 proto)
+void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
 {
         int i;
+        int err = 0;
 
         spin_lock_bh(&xfrm_state_lock);
         for (i = 0; i <= xfrm_state_hmask; i++) {
@@ -400,6 +408,11 @@ restart:
                                 spin_unlock_bh(&xfrm_state_lock);
 
                                 xfrm_state_delete(x);
+                                err = xfrm_state_delete(x);
+                                xfrm_audit_log(audit_info->loginuid,
+                                               audit_info->secid,
+                                               AUDIT_MAC_IPSEC_DELSA,
+                                               err ? 0 : 1, NULL, x);
                                 xfrm_state_put(x);
 
                                 spin_lock_bh(&xfrm_state_lock);