netdev - [PATCH cumulus-4.1.y 2/5] vxlan: don't replace fdb entry if nothing changed

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 20 Jan 2017 23:40:07 -0800
From:   Roopa Prabhu <roopa@...ulusnetworks.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, ramanb@...ulusnetworks.com,
        stephen@...workplumber.org, jbenc@...hat.com, pshelar@....org
Subject: [PATCH cumulus-4.1.y 2/5] vxlan: don't replace fdb entry if nothing changed

From: Balakrishnan Raman <ramanb@...ulusnetworks.com>

This will avoid unnecessary notifications to userspace.

Signed-off-by: Balakrishnan Raman <ramanb@...ulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
 drivers/net/vxlan.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 15b1c23..72b99ff 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -467,12 +467,19 @@ static int vxlan_fdb_replace(struct vxlan_fdb *f,
 	if (!rd)
 		return 0;
 
-	dst_cache_reset(&rd->dst_cache);
-	rd->remote_ip = *ip;
-	rd->remote_port = port;
-	rd->remote_vni = vni;
-	rd->remote_ifindex = ifindex;
-	return 1;
+	if (!vxlan_addr_equal(&rd->remote_ip, ip) ||
+	    rd->remote_port != port ||
+	    rd->remote_vni != vni ||
+	    rd->remote_ifindex != ifindex) {
+		dst_cache_reset(&rd->dst_cache);
+		rd->remote_ip = *ip;
+		rd->remote_port = port;
+		rd->remote_vni = vni;
+		rd->remote_ifindex = ifindex;
+		return 1;
+	}
+
+	return 0;
 }
 
 /* Add/update destinations for multicast */
-- 
1.9.1