Please ignore this one, as I forgot to add the v2 tag. A new one was
sent, and patchwork is updated!
//Eelco
On 13 Nov 2020, at 10:58, Eelco Chaudron wrote:
Add support for the dec_ttl action. Instead of programming the
datapath with
a flow that matches the packet TTL and an IP set, use a single dec_ttl
action.
The old behavior is kept if the new action is not supported by the
datapath.
# ovs-ofctl dump-flows br0
cookie=0x0, duration=12.538s, table=0, n_packets=4, n_bytes=392, ip
actions=dec_ttl,NORMAL
cookie=0x0, duration=12.536s, table=0, n_packets=4, n_bytes=168,
actions=NORMAL
# ping -c1 -t 20 192.168.0.2
PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.
IP (tos 0x0, ttl 19, id 45336, offset 0, flags [DF], proto ICMP (1),
length 84)
192.168.0.1 > 192.168.0.2: ICMP echo request, id 8865, seq 1,
length 64
Linux netlink datapath support depends on upstream Linux commit:
744676e77720 ("openvswitch: add TTL decrement action")
Note that in the Linux kernel tree the OVS_ACTION_ATTR_ADD_MPLS has
been
defined, and to make sure the IDs are in sync, it had to be added to
the
OVS source tree. This required some additional case statements, which
should be revisited once the OVS implementation is added.
Co-developed-by: Matteo Croce <[email protected]>
Co-developed-by: Bindiya Kurle <[email protected]>
Signed-off-by: Eelco Chaudron <[email protected]>
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