Dear Ben,
Yes, done. Thx.
Another question; it seems to be that only the first packet of the
flow is appropriately matched through my user-space rule, while the
rest are pretty much ignored. Is there any manual about extending the
kernel datapath to appropriately cache my field?
I think that for the moment, I could also live without the cache. Is
there any way to switch it off so that all packets (for example for a
certain flow) always go through ovs-vswitchd?
Best regards,
Eryk Schiller
Quoting Ben Pfaff <[email protected]>:
On Wed, Feb 08, 2017 at 10:29:29PM +0100, Eryk Schiller wrote:
Dear all,
I am writing this post, because I saw a discussion from the beginning of
2016 about the implementation of an additional matching field of UDP in OVS.
Maybe you can help with a similar implementation.
The discussion is here,
https://mail.openvswitch.org/pipermail/ovs-discuss/2016-April/040894.html
and I found another similar patch implementing some IGMP functionality here.
https://patchwork.ozlabs.org/patch/555337/
I went through the FAQ, discussion, and the aforementioned patch, and
implemented a new custom user-space matching rule.
However, when I add my field to flow rules, i.e.,
ovs-ofctl --verbose -O OpenFlow15 add-flow ovs-br
in_port=4,ip,udp,my_field=0x6,action=normal
2017-02-08T20:42:13Z|00001|hmap|DBG|lib/shash.c:112: 7 nodes in bucket (64
nodes, 32 buckets)
2017-02-08T20:42:13Z|00002|hmap|DBG|lib/shash.c:112: 6 nodes in bucket (128
nodes, 64 buckets)
2017-02-08T20:42:13Z|00003|hmap|DBG|lib/shash.c:112: 7 nodes in bucket (128
nodes, 64 buckets)
2017-02-08T20:42:13Z|00004|hmap|DBG|lib/shash.c:112: 7 nodes in bucket (128
nodes, 64 buckets)
2017-02-08T20:42:13Z|00005|stream_unix|DBG|/var/run/openvswitch/ovs-br:
connection failed (No such file or directory)
2017-02-08T20:42:13Z|00006|ofctl|DBG|connecting to
unix:/var/run/openvswitch/ovs-br.mgmt
2017-02-08T20:42:13Z|00007|hmap|DBG|lib/ofp-msgs.c:1143: 6 nodes in bucket
(128 nodes, 64 buckets)
2017-02-08T20:42:13Z|00008|hmap|DBG|lib/ofp-msgs.c:1143: 6 nodes in bucket
(256 nodes, 128 buckets)
2017-02-08T20:42:13Z|00009|hmap|DBG|lib/ofp-msgs.c:1143: 7 nodes in bucket
(512 nodes, 256 buckets)
2017-02-08T20:42:13Z|00010|hmap|DBG|lib/ofp-msgs.c:1143: 8 nodes in bucket
(512 nodes, 256 buckets)
2017-02-08T20:42:13Z|00011|hmap|DBG|lib/ofp-msgs.c:1143: 6 nodes in bucket
(512 nodes, 256 buckets)
2017-02-08T20:42:13Z|00012|hmap|DBG|lib/ofp-msgs.c:1143: 7 nodes in bucket
(512 nodes, 256 buckets)
2017-02-08T20:42:13Z|00013|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
sent (Success): OFPT_HELLO (OF1.5) (xid=0x1):
version bitmap: 0x06
2017-02-08T20:42:13Z|00014|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
received: OFPT_HELLO (OF1.5) (xid=0x39):
version bitmap: 0x01, 0x02, 0x03, 0x04, 0x05, 0x06
2017-02-08T20:42:13Z|00015|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
negotiated OpenFlow version 0x06 (we support version 0x06, peer supports
version 0x06 and earlier)
2017-02-08T20:42:13Z|00016|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
sent (Success): OFPT_FLOW_MOD (OF1.5) (xid=0x2): ADD *udp,in_port=4*
actions=NORMAL
2017-02-08T20:42:13Z|00017|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
sent (Success): OFPT_BARRIER_REQUEST (OF1.5) (xid=0x3):
2017-02-08T20:42:13Z|00018|poll_loop|DBG|wakeup due to 0-ms timeout
2017-02-08T20:42:13Z|00019|poll_loop|DBG|wakeup due to [POLLIN] on fd 4
(<->/var/run/openvswitch/ovs-br.mgmt) at lib/stream-fd.c:155
2017-02-08T20:42:13Z|00020|vconn|DBG|unix:/var/run/openvswitch/ovs-br.mgmt:
received: OFPT_BARRIER_REPLY (OF1.5) (xid=0x3):
There is only an ADD for udp,in_port=4; so my_field seems to be ignored, but
surprisingly overall the switch does what I want. Moreover, dump-flows does
not recognize this my_field properly either.
The question is what is the proper way to include custom my_field in OF
messages so that I can use it with ovs-ofctl add-flow and ovs-ofctl
dump-flows? Is there any additional answer to that in FAQ?
It sounds like your new field just isn't being printed as part of
formatting a match. Make sure that you added it to match_format() in
lib/match.c.
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