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| author | William Tu <u9012063@gmail.com> | 2016-06-24 07:42:30 -0700 |
|---|---|---|
| committer | Pravin B Shelar <pshelar@ovn.org> | 2016-06-24 09:17:00 -0700 |
| commit | aaca4fe0ce9e90a41b3f4db84be7d05823c733e4 (patch) | |
| tree | 501ddeb047ddb614067f89787d71bb01427bacc1 /ofproto/ofproto-dpif-sflow.c | |
| parent | 4c7804f14b9b5bbcd37cf9170781e2f820992532 (diff) | |
| download | openvswitch-aaca4fe0ce9e90a41b3f4db84be7d05823c733e4.tar.gz | |
ofp-actions: Add truncate action.
The patch adds a new action to support packet truncation. The new action
is formatted as 'output(port=n,max_len=m)', as output to port n, with
packet size being MIN(original_size, m).
One use case is to enable port mirroring to send smaller packets to the
destination port so that only useful packet information is mirrored/copied,
saving some performance overhead of copying entire packet payload. Example
use case is below as well as shown in the testcases:
- Output to port 1 with max_len 100 bytes.
- The output packet size on port 1 will be MIN(original_packet_size, 100).
# ovs-ofctl add-flow br0 'actions=output(port=1,max_len=100)'
- The scope of max_len is limited to output action itself. The following
packet size of output:1 and output:2 will be intact.
# ovs-ofctl add-flow br0 \
'actions=output(port=1,max_len=100),output:1,output:2'
- The Datapath actions shows:
# Datapath actions: trunc(100),1,1,2
Tested-at: https://travis-ci.org/williamtu/ovs-travis/builds/140037134
Signed-off-by: William Tu <u9012063@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Diffstat (limited to 'ofproto/ofproto-dpif-sflow.c')
| -rw-r--r-- | ofproto/ofproto-dpif-sflow.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ofproto/ofproto-dpif-sflow.c b/ofproto/ofproto-dpif-sflow.c index fbc82b735..5d26b7c47 100644 --- a/ofproto/ofproto-dpif-sflow.c +++ b/ofproto/ofproto-dpif-sflow.c @@ -1140,6 +1140,7 @@ dpif_sflow_read_actions(const struct flow *flow, } break; + case OVS_ACTION_ATTR_TRUNC: case OVS_ACTION_ATTR_USERSPACE: case OVS_ACTION_ATTR_RECIRC: case OVS_ACTION_ATTR_HASH: |