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Message-ID: <cover.1721851988.git.pabeni@redhat.com>
Date: Wed, 24 Jul 2024 22:24:46 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: netdev@...r.kernel.org
Cc: Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...nulli.us>,
Madhu Chittim <madhu.chittim@...el.com>,
Sridhar Samudrala <sridhar.samudrala@...el.com>,
Simon Horman <horms@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Sunil Kovvuri Goutham <sgoutham@...vell.com>,
Jamal Hadi Salim <jhs@...atatu.com>
Subject: [PATCH RFC v2 00/11] net: introduce TX shaping H/W offload API
We have a plurality of shaping-related drivers API, but none flexible
enough to meet existing demand from vendors[1].
This series introduces new device APIs to configure in a flexible way
TX shaping H/W offload. The new functionality is exposed via a newly
defined generic netlink interface and includes introspection
capabilities. Some self-tests are included, on top of a dummy
netdevsim implementation, and a basic implementation for the iavf
driver.
Some usage examples:
* Configure shaping on a given queue:
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do set --json '{"ifindex":'$IFINDEX',
"shaper": {"handle":
{"scope": "queue", "id":'$QUEUEID' },
"bw-max": 2000000 }}'
* Container B/W sharing
The orchestration infrastructure wants to group the
container-related queues under a RR scheduling and limit the aggregate
bandwidth:
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do group --json '{"ifindex":'$IFINDEX',
"inputs": [
{"handle": {"scope": "queue", "id":'$QID1' },
"weight": '$W1'},
{"handle": {"scope": "queue", "id":'$QID2' },
"weight": '$W2'}],
{"handle": {"scope": "queue", "id":'$QID3' },
"weight": '$W3'}],
"output": { "handle": {"scope":"netdev"},
"output": { "handle": {"scope":"netdev"},
"bw-max": 10000000}}'
{'handle': {'id': 0, 'scope': 'netdev'}}
* Delegation
A container wants to set a B/W limit on 2 of its own queues:
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do group --json '{"ifindex":'$IFINDEX',
"inputs": [
{"handle": {"scope": "queue", "id":'$QID1' },
"weight": '$W1'},
{"handle": {"scope": "queue", "id":'$QID2' },
"weight": '$W2'}],
"output": { "handle": {"scope":"detached"},
"bw-max": 5000000}}'
{'handle': {'id': 0, 'scope': 'detached'}}
* Cleanup:
Deleting a single queue shaper:
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do delete --json \
'{"ifindex":'$IFINDEX',
"handle": {"scope": "queue", "id":'$QID1' }}'
Deleting the last shaper under a group deletes the group, too:
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do delete --json \
'{"ifindex":'$IFINDEX',
"handle": {"scope": "queue", "id":'$QID2' }}'
./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml \
--do get --json '{"ifindex":'$IF',
"handle": { "scope": "detached", "id": 0}}'
Netlink error: Invalid argument
nl_len = 80 (64) nl_flags = 0x300 nl_type = 2
error: -22
extack: {'msg': "Can't find shaper for handle 10000000"}
Changes from RFC v1:
- set() and delete() ops operate on a single shaper
- added group() op to allow grouping and nesting
- split the NL implementation into multiple patches to help reviewing
RFC v1: https://lore.kernel.org/netdev/cover.1719518113.git.pabeni@redhat.com/
[1] https://lore.kernel.org/netdev/20240405102313.GA310894@kernel.org/
Paolo Abeni (7):
netlink: spec: add shaper YAML spec
net-shapers: implement NL get operation
net-shapers: implement NL set and delete operations
net-shapers: implement NL group operation
netlink: spec: add shaper introspection support
net: shaper: implement introspection support
testing: net-drv: add basic shaper test
Sudheer Mogilappagari (2):
iavf: Add net_shaper_ops support
iavf: add support to exchange qos capabilities
Wenjun Wu (2):
virtchnl: support queue rate limit and quanta size configuration
ice: Support VF queue rate limit and quanta size configuration
Documentation/netlink/specs/shaper.yaml | 337 ++++++
Documentation/networking/kapi.rst | 3 +
MAINTAINERS | 1 +
drivers/net/Kconfig | 1 +
drivers/net/ethernet/intel/Kconfig | 1 +
drivers/net/ethernet/intel/iavf/iavf.h | 13 +
drivers/net/ethernet/intel/iavf/iavf_main.c | 215 +++-
drivers/net/ethernet/intel/iavf/iavf_txrx.h | 2 +
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 157 ++-
drivers/net/ethernet/intel/ice/ice.h | 2 +
drivers/net/ethernet/intel/ice/ice_base.c | 2 +
drivers/net/ethernet/intel/ice/ice_common.c | 21 +
.../net/ethernet/intel/ice/ice_hw_autogen.h | 8 +
drivers/net/ethernet/intel/ice/ice_txrx.h | 1 +
drivers/net/ethernet/intel/ice/ice_type.h | 1 +
drivers/net/ethernet/intel/ice/ice_vf_lib.h | 8 +
drivers/net/ethernet/intel/ice/ice_virtchnl.c | 333 ++++++
drivers/net/ethernet/intel/ice/ice_virtchnl.h | 11 +
.../intel/ice/ice_virtchnl_allowlist.c | 6 +
drivers/net/netdevsim/netdev.c | 37 +
include/linux/avf/virtchnl.h | 119 +++
include/linux/netdevice.h | 17 +
include/net/net_shaper.h | 169 +++
include/uapi/linux/net_shaper.h | 91 ++
net/Kconfig | 3 +
net/Makefile | 1 +
net/core/dev.c | 2 +
net/core/dev.h | 6 +
net/shaper/Makefile | 9 +
net/shaper/shaper.c | 962 ++++++++++++++++++
net/shaper/shaper_nl_gen.c | 142 +++
net/shaper/shaper_nl_gen.h | 30 +
tools/testing/selftests/drivers/net/Makefile | 1 +
tools/testing/selftests/drivers/net/shaper.py | 267 +++++
.../testing/selftests/net/lib/py/__init__.py | 1 +
tools/testing/selftests/net/lib/py/ynl.py | 5 +
36 files changed, 2983 insertions(+), 2 deletions(-)
create mode 100644 Documentation/netlink/specs/shaper.yaml
create mode 100644 include/net/net_shaper.h
create mode 100644 include/uapi/linux/net_shaper.h
create mode 100644 net/shaper/Makefile
create mode 100644 net/shaper/shaper.c
create mode 100644 net/shaper/shaper_nl_gen.c
create mode 100644 net/shaper/shaper_nl_gen.h
create mode 100755 tools/testing/selftests/drivers/net/shaper.py
--
2.45.2
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