audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=n

Disables auditing in ipsec when CONFIG_AUDITSYSCALL is
disabled in the kernel.

Also includes a bug fix for xfrm_state.c as a result of
original ipsec audit patch.

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>

include/net/xfrm.h

@@ -398,8 +398,13 @@ struct xfrm_audit
 	uid_t	loginuid;
 	u32	secid;
 };
-void xfrm_audit_log(uid_t auid, u32 secid, int type, int result,
+
+#ifdef CONFIG_AUDITSYSCALL
+extern void xfrm_audit_log(uid_t auid, u32 secid, int type, int result,
 		    struct xfrm_policy *xp, struct xfrm_state *x);
+#else
+#define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
+#endif /* CONFIG_AUDITSYSCALL */
 
 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
 {

net/xfrm/xfrm_policy.c

@@ -1986,6 +1986,7 @@ int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *first,
 
 EXPORT_SYMBOL(xfrm_bundle_ok);
 
+#ifdef CONFIG_AUDITSYSCALL
 /* Audit addition and deletion of SAs and ipsec policy */
 
 void xfrm_audit_log(uid_t auid, u32 sid, int type, int result,
@@ -2094,6 +2095,7 @@ void xfrm_audit_log(uid_t auid, u32 sid, int type, int result,
 }
 
 EXPORT_SYMBOL(xfrm_audit_log);
+#endif /* CONFIG_AUDITSYSCALL */
 
 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
 {

net/xfrm/xfrm_state.c

@@ -407,7 +407,6 @@ void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
 				xfrm_state_hold(x);
 				spin_unlock_bh(&xfrm_state_lock);
 
-				xfrm_state_delete(x);
 				err = xfrm_state_delete(x);
 				xfrm_audit_log(audit_info->loginuid,
 					       audit_info->secid,