From: Jesse Gross <jesse@nicira.com>
Date: Mon, 24 Jun 2013 19:21:29 +0000 (-0700)
Subject: datapath: Do not clear key in ovs_match_init()
X-Git-Tag: v1.11.0~63
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Fovs.git;a=commitdiff_plain;h=ce3fbe30ced329c5bd2ee54a0ee46884e4caa788

datapath: Do not clear key in ovs_match_init()

When executing packets sent from userspace, the majority of the
flow information is extracted from the packet itself and a small
amount of metadata supplied by userspace is added. However, when
adding this metadata, the extracted flow information is currently
being cleared.

This manifests in a problem when executing actions as elements of key are
used when verifying some actions. For example a dec_ttl action verifies the
proto of the flow. An example of a flow that fails as a result of this
problem is:

        ovs-ofctl add-flow br0 "ip actions=dec_ttl,normal"

This is a regression added by "datapath: Mega flow implementation",
a1c564be1e2ffc31f8da09ab654c8ed987907fe5.

CC: Andy Zhou <azhou@nicira.com>
Reported-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Jesse Gross <jesse@nicira.com>
---

diff --git a/datapath/flow.c b/datapath/flow.c
index a49084de7..5566f1d83 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -1599,7 +1599,8 @@ int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
 	if (err)
 		return -EINVAL;
 
-	ovs_match_init(&match, &flow->key, NULL);
+	memset(&match, 0, sizeof(match));
+	match.key = &flow->key;
 
 	err = metadata_from_nlattrs(&match, &attrs, a, false);
 	if (err)