[PATCH] Wake up km_waitq after changing policies

[Herbert Xu <herbert@gondor.apana.org.au>]

Hi Dave:

This patch wakes up km_waitq everytime the SPD is manipulated.  Without
this, the KM can only unblock pending connections by adding states.  For
example, if Opportunistic Encryption fails, FreeSWAN adds a pass policy
to let traffic through.  Without this patch, the packet that caused this
ends up being dropped.

Cheers,
-- 
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email:  Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Index: kernel-source-2.5/net/xfrm/xfrm_policy.c
===================================================================
RCS file: /home/gondolin/herbert/src/CVS/debian/kernel-source-2.5/net/xfrm/xfrm_policy.c,v
retrieving revision 1.7
diff -u -r1.7 xfrm_policy.c
--- kernel-source-2.5/net/xfrm/xfrm_policy.c	13 Jun 2003 11:22:19 -0000	1.7
+++ kernel-source-2.5/net/xfrm/xfrm_policy.c	13 Jun 2003 12:09:29 -0000
@@ -319,6 +319,7 @@
 	if (delpol) {
 		xfrm_policy_kill(delpol);
 	}
+	wake_up(&km_waitq);
 	return 0;
 }
 
@@ -336,9 +337,10 @@
 		}
 	}
 	if (pol) {
-		if (delete)
+		if (delete) {
 			atomic_inc(&flow_cache_genid);
-		else
+			wake_up(&km_waitq);
+		} else
 			xfrm_pol_hold(pol);
 	}
 	write_unlock_bh(&xfrm_policy_lock);
@@ -358,9 +360,10 @@
 		}
 	}
 	if (pol) {
-		if (delete)
+		if (delete) {
 			atomic_inc(&flow_cache_genid);
-		else
+			wake_up(&km_waitq);
+		} else
 			xfrm_pol_hold(pol);
 	}
 	write_unlock_bh(&xfrm_policy_lock);
@@ -385,6 +388,7 @@
 	}
 	atomic_inc(&flow_cache_genid);
 	write_unlock_bh(&xfrm_policy_lock);
+	wake_up(&km_waitq);
 }
 
 int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*),
@@ -504,6 +508,7 @@
 	if (old_pol) {
 		xfrm_policy_kill(old_pol);
 	}
+	wake_up(&km_waitq);
 	return 0;
 }