[ovs-dev] [PATCH 0/2 v2.21] MPLS actions and matches
Simon Horman
horms at verge.net.au
Mon Mar 18 07:37:15 UTC 2013
Hi,
This series implements MPLS actions and matches based on work by
Ravi K, Leo Alterman and Yamahata-san.
This series provides two changes
* Tweaks to the generation of odp actions when MPLS actions are present and;
* Adding basic MPLS action and match support to the kernel datapath
Future Work:
* Continue work on implementaiton of recirculation and a host of more
sophisticated MPLS features including:
- copy_ttl_in
- copy_ttl_out
- L3+ actions on MPLS frames (e.g. pop_mpls(0x800),set_ttl)
- multi-level mpls_pop and mpls_push
* Other more specific datapath todo items listed in the changelog of
"datapath: Add basic MPLS support to kernel"
Key differences between v2.20 and v2.21
* Ensure that that l3 and l4 actions always always occur prior to a push_mpls
action and in the kernel datapatyh use the network header pointer of an skb
to track the top of the MPLS stack. This avoids adding an l2_size element to
the skb callback.
Key differences between v2.19 and v2.20
* Dropped inner/outer flow changes and changes that depend on them
* Updated "datapath: Add basic MPLS support to kernel" as per Jesse's review.
Key differences between v2.18 and v2.19
* Address review by Ben Pfaff
- When encoding MPLS information in ODP flow key data use encap()
- Remove encap_dl_type parameter from odp_flow_key_from_flow()
- Use xlate_actions() for l3 decoding based on ether_type
from MPLS. Previously this logic was elsewhere but did not
take into account resubmit.
* Bufix for kernel datapath:
- Correct logic error in ovs_flow_tbl_next() that prevented facets from
being dumped by the kernel-datapath. The result being that ovs-vswitchd
would evict facts from the datapath regardless if they had been
recently used or not. This may in turn cause flow misses and upcalls to
ovs-vswitchd.
Key differences between the v2.17 and v2.18:
* Rebase
- The basic user-space support patch has been merged :)
- Adjust for is_ip_any()
* Added patch to correct setting of ethertype in pop_mpls()
Key differences between the v2.15 and v2.16:
* Rebase
* Address review by Ben Pfaff, particularly in th first patch of the
series "User-Space MPLS actions and matches"
Key differences between the v2.15 and v2.16:
* Rebase
* Use 62 for OVS_KEY_ATTR_MPLS to reduce the scope for conflict
with new values in the future
Key differences between the v2.14 and v2.15:
* Addressed review by Ben Pfaff and Jesse Gross
In particular:
- Use Use OVS_ACTION_SET to set OVS_KEY_ATTR_MPLS instead o
Still under discussion
- Move OVS_KEY_ATTR_MPLS to after all upstream attributes
- Move OVS_ACTION_ATTR_PUSH_MPLS and OVS_ACTION_ATTR_POP_MPLS
to after all upstream attributes
Key differences between the v2.13 and v2.14:
* Reshuffle patches moving kernel datapath patches to the end of the series
and allowing the other patches to be applied independently. That is,
the first 10 patches of the series may be applied. They do not
touch the kernel. And the result will be MPLS support for ovs-vswitchd
and the user-space datapath.
Key differences between the v2.12 and v2.13:
* Rebase
* Add Inner and Outer flow support to user-space datapath
* Allow MPLS matches for OpenFlow 1.3
* Optimisations suggested by Jarno Rajahalme
Key differences between the v2.11 and v2.12:
* Rebase
* Add eth_type_mpls helper
* Add flow_innermost_dl_type helper
* calculate MPLS fitness over entire flow
- It is sufficient to just calculate the fitness of an MPLS frame once.
- Previously a fitness calculation was made based on expectations calculat
on L1 and L2 data. However, this may not be correct as it will return
ODP_FIT_TOO_MUCH in the case where the key contains L3 attributes.
* Pass MPLS lse to push_mpls
- When push_mpls() the LSE of the flow is always already known,
so pass it to push_mpls and set it directly. This avoids:
+ The need to re-compose an default LSE, allowing
the removal of get_lse()
+ The need to follow each call to push_mpls() with
a call to set_mpls_lse()
- This fixes the previously bogus usage of push_mpls
in dp_netdev_execute_actions, allowing push_mpls to work
in conjunction with the user-space datapath.
* Add dl_type parameter to flow_extract_l3_onwards()
and thus allow "flow: Split flow_extract" to be applied
independently of the rest of this patch-set.
Key differences between the v2.10 and v2.11:
* Rebase
* The last 13 patches in the series have been added to allow
handling of actions on MPLS flows that modify any L3+ data.
In particular, to allow modification of the IP TTL.
This is achieved by adding the notion of inner and outer flows.
This works as follows.
- A match is decoded from a packet using the existing implementation
and this is used to look up the flow.
- If the flow includes actions that allow further decoding of
the packet - e.g. an MPLS pop action which supplies the
ethernet type of the encapsulated frame - then the packet is
further decoded and a more fine-grained match is made. This match
is then used to lookup the flow again.
In such cases the flow added to the datapath by ovs-vswtichd
includes the richer match and the actions. The datapath inspects
the actions and if there are actions that allow further decoding of
the packet it inserts the flow twice, once including only an L1 and L2
match and once including the richer match. The former is the
other flow and the latter is the inner flow.
Each inner flow has a single outer flow. Outer flows may
have more than one inner flow. Inner flows are not exposed
to ovs-vswitchd. Inner flows are deleted when their outer
flow is deleted.
* Check the size of nx_action_mpls_ttl.
nx_action_pop_mpls was being checked
due to a cut-and-paste error
Key differences between the previous post, v2.9, and this post, v2.10:
* Rebase
* Check the size of nx_action_mpls_ttl.
nx_action_pop_mpls was being checked
due to a cut-and-paste error
Key differences between v2.8 and v2.9
* Rebase
and fix tests accordingly
* Always update MPLS bos pointer when
VLAN pop is performed in kernel datapath.
Key differences between v2.7 and v2.8
* Rebase
Key differences between v2.6 and v2.7
* When encoding TTL actions (the last 4 patches) for
an OpenFlow 1.1+ message, encode them as OpenFlow 1.1+
actions. Previously they were encoded as NX matches.
Key differences between v2.5 and v2.6
* Dropped "flow: Set ttl in flow_compose()", this is
now present in the master branch
* Dropped "nx-match: Do not check pre-requisites for load actions",
instead, dl_type changes are tracked to allow correct pre-requisite
checking in the presence of push_mpls and pop_mpls actions.
Key differences between v2.4 and v2.5
* Various clean-ups and fises to
"User-Space MPLS actions and matches"
as noted in its changelog.
* New patches to add support for TLS actions
* Inclusion of Justin Pettit's patch
"flow: Set ttl in flow_compose()",
which is a dependency of the
"Add support for copy_ttl_out action" patch.
Key differences between v2.3 and v2.4
* Minor cleanup to "User-Space MPLS actions and matches"
as detailed in its changelog.
* A new patch at the end of the series
"Add support for set_mpls_ttl action"
Changes are detailed in the changelog of each patch.
The test suite passes when this series is applied on top
of the current master branch.
Diffstat and git information is provided to aid review.
----------------------------------------------------------------
The following changes since commit a614d823ae5d753297a8d0c63c703338a7ac0653:
ofproto: Create and delete tnl_backers in type_run() (2013-02-26 11:22:32 -0800)
are available in the git repository at:
git://github.com/horms/openvswitch.git devel/mpls-v2.20
for you to fetch changes up to 6984f12f40b7ef43d859239b2438bf0a4f6e506a:
datapath: Add basic MPLS support to kernel (2013-02-28 18:01:44 +0900)
----------------------------------------------------------------
The following changes since commit fba6bd1d3f5891471daea8bf5da22303c2d889df:
ovs-vsctl: Try connecting only once for active connections by default. (2013-03-15 16:26:47 -0700)
are available in the git repository at:
git://github.com/horms/openvswitch.git devel/mpls-v2.21
for you to fetch changes up to 7add7353a1e5647d14f3a56c63c731bd9111e4fe:
datapath: Add basic MPLS support to kernel (2013-03-18 15:05:01 +0900)
----------------------------------------------------------------
Simon Horman (2):
mpls: Allow l3 and l4 actions to prior to a push_mpls action
datapath: Add basic MPLS support to kernel
datapath/actions.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++
datapath/datapath.c | 48 ++++++++++++++++++------
datapath/datapath.h | 2 +
datapath/flow.c | 62 ++++++++++++++++++++++++++++---
datapath/flow.h | 29 +++++++++++----
lib/odp-util.c | 6 +--
6 files changed, 222 insertions(+), 27 deletions(-)
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