[ovs-dev] [PATCH v3 0/9] Support zone-based conntrack timeout policy

Darrell Ball dlu998 at gmail.com
Tue Aug 13 02:18:05 UTC 2019


Thanks for the patches

On Mon, Aug 12, 2019 at 5:51 PM Yi-Hung Wei <yihung.wei at gmail.com> wrote:

> This patch series enables zone-based conntrack timeout policy support in
> OVS.
> Timeout policy is a set of timeout attributes that can be associated with a
> connection when it is committed.  Then, the connection tracking system will
> expire a connection based on its connection state.  For example, one use
> case would be to extend the timeout of TCP connection in the established
> state to avoid re-connect overhead. Other use case may be to shorten the
> connection timeout so that the system can reclaim resources faster.
> The idea of zone-based conntrack timeout policy is to group connections
> with similar characteristics in a conntrack zone, and assign timeout policy
> to the conntrack zone.  In this way, all the connections in that zone will
> share
> the same timeout policy.
>
> For zone-based timeout policy configuration, the association of conntrack
> zone and conntrack timeout policy is defined per datapath in vswitch ovsdb
> schema.  User can program the database through ovs-vsctl or using ovsdb
> protocol directly.  Once the zone-based timeout policy configuration is
> in the database, vswitchd will read those configuration and organize it
> in internal datapath structure, and push the timeout policy into datapath.
> Currently, only the kernel datapath supports customized timeout policy.
>
> When a packet is committed to connection tracking system, during flow
> translation in ofproto-dpif-xlate, vsiwtchd will lookup the internal
> data structure to figure out which timeout policy to associate with
> the connection.





> If timeout policy is not specified to the committed
> zone, it defaults to the timeout policy in the default zone (zone 0).
>

The above is no longer true since we removed the default zone code.



> If the timeout policy is not specified in the default zone, it defaults
> to the system default timeouts.
>
> Here are some more details about each patch
> * p01: Introduce ovsdb schema for ct timeout policy.
> * p02: ovs-vsctl commands to configure zone-based ct timeout policy.
> * p03: Expose a utility functions.
> * p04: dpif interface along with dpif-netlink implementation to support
>        ct timeout policy.
> * p05: Consume ct timeout policy configuration from ovsdb server,
>        keep it in internal data structure, and push configuration to
>        datapath.
> * p06: Add utility function to help compare two simaps.
> * p07-08: Kernel datapath support for the new ct action attribute.
> * p09: Translate timeout policy in ofproto-dpif-xlate and system traffic
> test.
>
> v2->v3
> * ovsdb schema
>     - Fold in changes from Justin.
>     - Make ct timeout policy key to be in a pre-defined set.
>

pre-defined set helps address a bug, I assume


> * ovs-vsctl
>     - Bug fixes.
> * ct-dpif
>     - Fold in diff suggestion from Justin.
> * bridge, ofproto-dpif
>     - Restruct the ofproto and dpif layer support for zone based timeout
>       policy.
> * system traffic test
>     - Fix bug reported by Darrell.
>

which one ?



> * Address review comments from Justin and Darrell.
>

The above history is a bit incomplete and vague, given the number of
comments
addressed. It makes it hard to track the comments addressed or missed bcoz
the
reviewer needs to go back to previous versions and correlate. If we do
another version.
please try to expand on the review comments in the different versions.



>
> v1->v2
>
> * ovs-vsctl
>     - Remove add-dp,del-dp,list-dp ovs-vsctl commands.
>     - Add --may-exist and --if-exists to ovs-vsctl add-zone-tp command.
>     - Improve ovs-vsctl test.
> * ct-dpif, dpif-netlink
>     - Remove support to change default timeout policy in the datapath.
>     - Squash ct-dpif and dpif-netlink layer implementation altogether.
>     - Address review comments from William.
> * ofproto-dpif
>     - Remove changes from datapath-config module to ofproto-dpif layer.
>     - Maintain zone-based timeout policy in dpif-backer since this is
>       per datapath type configuration. This will not break the OVS
>       hierarchy as Ilya suggested.
>     - Allocate timeout policy id using id_pool instead of idl_seqno
>       as Darrell suggested.
>     - Add a timeout policy sweep function that clean up unnecessary
>       timeout policy regularly in the datapath.
> * ofproto-dpif-xlate
>     - Only translate ct timeout policy if it is a ct commit action
>       in kernel datapath.
> * system-traffic test
>     - Update system traffic test with low level ovs-vsctl command.
>     - Make system traffic test to be datapath type agnostic.
>     - Improve system traffic test as Darrell suggested.
> * Rebase to master
>
>
> Ben Pfaff (1):
>   simap: Add utility function to help compare two simaps.
>
> Justin Pettit (1):
>   ovs-vswitchd: Add Datapath, CT_Zone, and CT_Zone_Policy tables.
>
> William Tu (1):
>   ovs-vsctl: Add conntrack zone commands.
>
> Yi-Hung Wei (6):
>   ct-dpif: Export ct_dpif_format_ipproto()
>   ct-dpif, dpif-netlink: Add conntrack timeout policy support
>   ofproto-dpif: Consume CT_Zone, and CT_Timeout_Policy tables
>   datapath: compat: Backport nf_conntrack_timeout support
>   datapath: Add support for conntrack timeout policy
>   ofproto-dpif-xlate: Translate timeout policy in ct action
>
>  Documentation/faq/releases.rst                     |   3 +-
>  NEWS                                               |   1 +
>  acinclude.m4                                       |   7 +
>  datapath-windows/include/OvsDpInterfaceCtExt.h     | 114 +++++
>  datapath-windows/ovsext/Netlink/NetlinkProto.h     |   8 +-
>  datapath/conntrack.c                               |  30 +-
>  datapath/linux/Modules.mk                          |   2 +
>  datapath/linux/compat/include/linux/openvswitch.h  |   4 +
>  .../include/net/netfilter/nf_conntrack_timeout.h   |  34 ++
>  datapath/linux/compat/nf_conntrack_timeout.c       | 102 +++++
>  include/windows/automake.mk                        |   1 +
>  .../windows/linux/netfilter/nfnetlink_cttimeout.h  |   0
>  lib/ct-dpif.c                                      | 118 ++++-
>  lib/ct-dpif.h                                      |  60 +++
>  lib/dpif-netdev.c                                  |  11 +
>  lib/dpif-netlink.c                                 | 481
> +++++++++++++++++++++
>  lib/dpif-netlink.h                                 |   1 -
>  lib/dpif-provider.h                                |  54 +++
>  lib/netlink-conntrack.c                            | 308 +++++++++++++
>  lib/netlink-conntrack.h                            |  27 +-
>  lib/netlink-protocol.h                             |   8 +-
>  lib/odp-util.c                                     |  29 +-
>  lib/simap.c                                        |  15 +-
>  lib/simap.h                                        |   1 +
>  ofproto/ofproto-dpif-xlate.c                       |  23 +
>  ofproto/ofproto-dpif.c                             | 320 ++++++++++++++
>  ofproto/ofproto-dpif.h                             |  14 +
>  ofproto/ofproto-provider.h                         |  10 +
>  ofproto/ofproto.c                                  |  30 ++
>  ofproto/ofproto.h                                  |   5 +
>  tests/odp.at                                       |   1 +
>  tests/ovs-vsctl.at                                 |  34 +-
>  tests/system-kmod-macros.at                        |  27 ++
>  tests/system-traffic.at                            |  66 +++
>  tests/system-userspace-macros.at                   |  26 ++
>  utilities/ovs-vsctl.8.in                           |  26 ++
>  utilities/ovs-vsctl.c                              | 194 +++++++++
>  vswitchd/bridge.c                                  | 202 +++++++++
>  vswitchd/vswitch.ovsschema                         |  51 ++-
>  vswitchd/vswitch.xml                               | 275 ++++++++++--
>  40 files changed, 2657 insertions(+), 66 deletions(-)
>  create mode 100644
> datapath/linux/compat/include/net/netfilter/nf_conntrack_timeout.h
>  create mode 100644 datapath/linux/compat/nf_conntrack_timeout.c
>  create mode 100644 include/windows/linux/netfilter/nfnetlink_cttimeout.h
>
> --
> 2.7.4
>
> _______________________________________________
> dev mailing list
> dev at openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>


More information about the dev mailing list