On 11/18/14 12:33 AM, Jesse Gross wrote:
On Mon, Nov 17, 2014 at 1:50 PM, Lori Jakab <loja...@cisco.com> wrote:
On 11/17/14 8:03 PM, Jesse Gross wrote:
On Mon, Nov 17, 2014 at 9:24 AM, Lorand Jakab <loja...@cisco.com> wrote:
diff --git a/datapath/flow_netlink.c b/datapath/flow_netlink.c
index 54510c8..8ca3469 100644
--- a/datapath/flow_netlink.c
+++ b/datapath/flow_netlink.c
@@ -692,6 +692,18 @@ static int metadata_from_nlattrs(struct
sw_flow_match *match, u64 *attrs,
else
SW_FLOW_KEY_PUT(match, phy.is_layer3, true,
is_mask);
}
+ /* Layer 3 packets from user space have the EtherType as metadata
*/
+ if (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
Is this correct? I thought that EtherType wasn't serialized in this
case - in other places we extract this from the IP/IPv6 attribute
directly.
For "ovs_flow" Netlink messages we can do that, but not for "ovs_packet"
messages, which only have packet metadata, not the full flow key. Packet
metadata didn't include EtherType until now, but I unless we use the nibble
from the IP version, we need to add it for layer 3 packets only.
Hmm, I see. I think that diverging the Netlink encoding for flow
installation vs. metadata is probably not a good idea over the long
term. If I remember correctly, I believe the reason for only encoding
part of the flow key for metadata was to reduce serialization cost.
Jarno is thinking about combining the packet execution with flow
installation, which would might make this a moot point. If that's the
case, then we can probably solve this issue by just using the full
flow key.
OK, how should I proceed then? Should I wait until that work lands in
master?
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