[XFRM]: Do not flush all bundles on SA insert.

Instead, simply set all potentially aliasing existing xfrm_state
objects to have the current generation counter value.

This will make routes get relooked up the next time an existing
route mentioning these aliased xfrm_state objects gets used,
via xfrm_dst_check().

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index fd4a300..a620a43 100644 (file)
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -996,7 +996,6 @@ struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
 extern void xfrm_policy_flush(u8 type);
 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
 extern int xfrm_flush_bundles(void);
-extern void xfrm_flush_all_bundles(void);
 extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family, int strict);
 extern void xfrm_init_pmtu(struct dst_entry *dst);
 

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 7fc6944..cfa5c69 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1478,16 +1478,6 @@ int xfrm_flush_bundles(void)
        return 0;
 }
 
-static int always_true(struct dst_entry *dst)
-{
-       return 1;
-}
-
-void xfrm_flush_all_bundles(void)
-{
-       xfrm_prune_bundles(always_true);
-}
-
 void xfrm_init_pmtu(struct dst_entry *dst)
 {
        do {

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 9820039..77ef796 100644 (file)
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -761,13 +761,30 @@ static void __xfrm_state_insert(struct xfrm_state *x)
                schedule_work(&xfrm_hash_work);
 }
 
+/* xfrm_state_lock is held */
+static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
+{
+       unsigned short family = xnew->props.family;
+       u32 reqid = xnew->props.reqid;
+       struct xfrm_state *x;
+       struct hlist_node *entry;
+       unsigned int h;
+
+       h = xfrm_dst_hash(&xnew->id.daddr, reqid, family);
+       hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
+               if (x->props.family     == family &&
+                   x->props.reqid      == reqid &&
+                   !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family))
+                       x->genid = xfrm_state_genid;
+       }
+}
+
 void xfrm_state_insert(struct xfrm_state *x)
 {
        spin_lock_bh(&xfrm_state_lock);
+       __xfrm_state_bump_genids(x);
        __xfrm_state_insert(x);
        spin_unlock_bh(&xfrm_state_lock);
-
-       xfrm_flush_all_bundles();
 }
 EXPORT_SYMBOL(xfrm_state_insert);
 
@@ -889,15 +906,13 @@ int xfrm_state_add(struct xfrm_state *x)
                                     x->id.proto,
                                     &x->id.daddr, &x->props.saddr, 0);
 
+       __xfrm_state_bump_genids(x);
        __xfrm_state_insert(x);
        err = 0;
 
 out:
        spin_unlock_bh(&xfrm_state_lock);
 
-       if (!err)
-               xfrm_flush_all_bundles();
-
        if (x1) {
                xfrm_state_delete(x1);
                xfrm_state_put(x1);