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Message-ID: <20180905051458.GD2977@mtr-leonro.mtl.com>
Date: Wed, 5 Sep 2018 08:14:58 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Jason Gunthorpe <jgg@...pe.ca>
Cc: Doug Ledford <dledford@...hat.com>,
RDMA mailing list <linux-rdma@...r.kernel.org>,
Ariel Levkovich <lariel@...lanox.com>,
Mark Bloch <markb@...lanox.com>,
Or Gerlitz <ogerlitz@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH rdma-next v1 00/15] Flow actions to mutate packets
On Tue, Sep 04, 2018 at 04:12:05PM -0600, Jason Gunthorpe wrote:
> On Tue, Aug 28, 2018 at 02:18:39PM +0300, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@...lanox.com>
> >
> > >From Mark,
> >
> > This series exposes the ability to create flow actions which can
> > mutate packet headers. We do that by exposing two new verbs:
> > * modify header - can change existing packet headers. packet
> > * reformat - can encapsulate or decapsulate a packet.
> > Once created a flow action must be attached to a steering
> > rule for it to take effect.
> >
> > The first 10 patches refactor mlx5_core code, rename internal structures
> > to better reflect their operation and export needed functions so the
> > RDMA side can allocate the action.
> >
> > The last 5 patches expose via the IOCTL infrastructure mlx5_ib methods
> > which do the actual allocation of resources and return an handle to the
> > user. A user of this API is expected to know how to work with the
> > device's spec as the input to those function is HW depended.
> >
> > An example usage of the modify header action is routing, A user can
> > create an action which edits the L2 header and decrease the TTL.
> >
> > An example usage of the packet reformat action is VXLAN encap/decap
> > which is done by the HW.
> >
> > Changelog:
> > v0 -> v1:
> > * Patch 1: Addressed Saeed's comments and simplified the logic.
> > * Patch 2: Changed due to changes in patch 1.
> >
> > Split the 27 patch series into 3, this is the first one
> > which just lets the user create flow action.
> > Other than that styling fixes mainly in the RDMA patches
> > to make sure 80 chars limit isn't exceeded.
> >
> > RFC -> v0:
> > * Patch 1 a new patch which refactors the logic
> > when getting a flow namespace.
> > * Patch 2 was split into two.
> > * Patch 3: Fixed a typo in commit message
> > * Patch 5: Updated commit message
> > * Patch 7: Updated commit message
> > Renamed:
> > - MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT_ID to
> > MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT
> > - packet_reformat_id to reformat_id in struct mlx5_flow_act
> > - packet_reformat_id to encap_id in struct mlx5_esw_flow_attr
> > - packet_reformat_id to encap_id in struct mlx5e_encap_entry
> > - PACKET_REFORMAT to REFORMAT when printing trace points
> > * Patch 9: Updated commit message
> > Updated function declaration in mlx5_core.h, could of lead
> > to compile error on bisection.
> > * Patch 11: Disallow egress rules insertion when in switchdev mode
> > * Patch 12: A new patch to deal with passing enum values using
> > the IOCTL infrastructure.
> > * Patch 13: Use new enum value attribute when passing enum
> > mlx5_ib_uapi_flow_table_type
> > * Patch 15: Don't set encap flags on flow tables if in switchdev mode
> > * Patch 17: Use new enum value attribute when passing enum
> > mlx5_ib_uapi_flow_table_type and enum
> > mlx5_ib_uapi_flow_action_packet_reformat_type
> > * Patch 19: Allow creation of both
> > MLX5_IB_UAPI_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L3_TUNNEL
> > and MLX5_IB_UAPI_FLOW_ACTION_PACKET_REFORMAT_TYPE_L3_TUNNEL_TO_L2
> > packet
> > reformat actions.
> > * Patch 20: A new patch which allows attaching packet reformat
> > actions to flow tables on NIC RX.
> >
> > Thanks
> >
> > Mark Bloch (15):
> > net/mlx5: Cleanup flow namespace getter switch logic
> > net/mlx5: Add proper NIC TX steering flow tables support
> > net/mlx5: Export modify header alloc/dealloc functions
> > net/mlx5: Add support for more namespaces when allocating modify
> > header
> > net/mlx5: Break encap/decap into two separated flow table creation
> > flags
> > net/mlx5: Move header encap type to IFC header file
> > {net, RDMA}/mlx5: Rename encap to reformat packet
> > net/mlx5: Expose new packet reformat capabilities
> > net/mlx5: Pass a namespace for packet reformat ID allocation
> > net/mlx5: Export packet reformat alloc/dealloc functions
> > RDMA/uverbs: Add UVERBS_ATTR_CONST_IN to the specs language
> > RDMA/mlx5: Add a new flow action verb - modify header
> > RDMA/uverbs: Add generic function to fill in flow action object
> > RDMA/mlx5: Add new flow action verb - packet reformat
> > RDMA/mlx5: Extend packet reformat verbs
> >
> > drivers/infiniband/core/uverbs_ioctl.c | 23 ++
> > .../infiniband/core/uverbs_std_types_flow_action.c | 7 +-
> > drivers/infiniband/hw/mlx5/devx.c | 6 +-
> > drivers/infiniband/hw/mlx5/flow.c | 301 +++++++++++++++++++++
> > drivers/infiniband/hw/mlx5/main.c | 3 +
> > drivers/infiniband/hw/mlx5/mlx5_ib.h | 19 +-
> > drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 8 +-
> > .../mellanox/mlx5/core/diag/fs_tracepoint.h | 2 +-
> > drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 51 ++--
> > drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 2 +-
> > .../ethernet/mellanox/mlx5/core/eswitch_offloads.c | 9 +-
> > drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c | 87 +++---
> > drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 73 +++--
> > .../net/ethernet/mellanox/mlx5/core/mlx5_core.h | 12 +-
> > include/linux/mlx5/device.h | 6 +
> > include/linux/mlx5/fs.h | 20 +-
> > include/linux/mlx5/mlx5_ifc.h | 70 +++--
> > include/rdma/uverbs_ioctl.h | 40 +++
> > include/rdma/uverbs_std_types.h | 12 +
> > include/uapi/rdma/mlx5_user_ioctl_cmds.h | 18 ++
> > include/uapi/rdma/mlx5_user_ioctl_verbs.h | 12 +
> > 21 files changed, 638 insertions(+), 143 deletions(-)
>
> This looks OK to me, can you make the shared commit please?
Thanks, I pushed to mlx5-next
50acec06f392 net/mlx5: Export packet reformat alloc/dealloc functions
31ca3648f01b net/mlx5: Pass a namespace for packet reformat ID allocation
bea4e1f6c6c5 net/mlx5: Expose new packet reformat capabilities
60786f0987c0 {net, RDMA}/mlx5: Rename encap to reformat packet
e0e7a3861b6c net/mlx5: Move header encap type to IFC header file
61444b458b01 net/mlx5: Break encap/decap into two separated flow table creation flags
c3c062f80665 net/mlx5: Add support for more namespaces when allocating modify header
90c1d1b8da67 net/mlx5: Export modify header alloc/dealloc functions
8ce78257965e net/mlx5: Add proper NIC TX steering flow tables support
2226dcb424bf net/mlx5: Cleanup flow namespace getter switch logic
>
> Thanks,
> Jason
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