Post-v2.3.0
---------------------
+ - Flow table modifications are now atomic, meaning that each packet
+ now sees a coherent version of the OpenFlow pipeline. For
+ example, if a controller removes all flows with a single OpenFlow
+ "flow_mod", no packet sees an intermediate version of the OpenFlow
+ pipeline where only some of the flows have been deleted.
- Added support for SFQ, FQ_CoDel and CoDel qdiscs.
- Add bash command-line completion support for ovs-vsctl Please check
utilities/ovs-command-compgen.INSTALL.md for how to use.
release. See ovs-vswitchd(8) for details.
- OpenFlow:
* OpenFlow 1.4 bundles are now supported, but for flow mod
- messages only. 'atomic' bundles are not yet supported, and
- 'ordered' bundles are trivially supported, as all bundled
- messages are executed in the order they were added to the
- bundle regardless of the presence of the 'ordered' flag.
+ messages only. Both 'atomic' and 'ordered' bundle flags are
+ trivially supported, as all bundled messages are executed in
+ the order they were added and all flow table modifications are
+ now atomic to the datapath.
* IPv6 flow label and neighbor discovery fields are now modifiable.
* OpenFlow 1.5 extended registers are now supported.
* The OpenFlow 1.5 actset_output field is now supported.
- ovs-ofctl has a new '--bundle' option that makes the flow mod commands
('add-flow', 'add-flows', 'mod-flows', 'del-flows', and 'replace-flows')
use an OpenFlow 1.4 bundle to operate the modifications as a single
- transaction. If any of the flow mods in a transaction fail, none of
- them are executed.
+ atomic transaction. If any of the flow mods in a transaction fail, none
+ of them are executed. All flow mods in a bundle appear to datapath
+ lookups simultaneously.
- ovs-ofctl 'add-flow' and 'add-flows' commands now accept arbitrary flow
mods as an input by allowing the flow specification to start with an
explicit 'add', 'modify', 'modify_strict', 'delete', or 'delete_strict'
keyword. A missing keyword is treated as 'add', so this is fully
backwards compatible. With the new '--bundle' option all the flow mods
- are executed as a single transaction using the new OpenFlow 1.4 bundles
- support.
+ are executed as a single atomic transaction using an OpenFlow 1.4 bundle.
- ovs-pki: Changed message digest algorithm from MD5 to SHA-1 because
MD5 is no longer secure and some operating systems have started to disable
it in OpenSSL.