Hi Dave,
This patch set introduces mlx5 RoCE/RDMA packet sniffer, it allows
mlx5e netdevice to receive RoCE/RDMA or RAW ETH traffic which isn't
supposed to be passed to the kernel stack, for sniffing and diagnostics
purposes. This traffic is still not supposed to go through the whole
network stack processing and should only go to the non-protocol specific
handlers (ptype_all). e.g: tcpdump, etc ..
In order to achieve this, when RoCE/RDMA sniffer is enabled, all RoCE/RDMA
steering rules which are forwarded to user space QPs will be duplicated
and marked with "OFFLOAD" flow tag, then forwarded to mlx5e netdevice receive
path.
mlx5e receive path will detect sniffer packets by looking at the receive
completion flow tag, and in case it matches the "OFFLOAD" tag, skb->pkt_type is
set to (PACKET_OFFLOAD_KERNEL) so it will go to non-protocol specific handlers
(ptype_all) only.
To duplicate specific steering rules, a new notification mechanism is added.
It allows a consumer to request add/del rule notification on specific steering
namespaces. Once a consumer registers, it will be notified on all existing
rules.
Asynchronously, notifications on a dynamically added/deleted rules will be
generated.
To achieve RoCE/RDMA sniffer, a new steering namespace is introduced
(SNIFFER_NAMESPACE),
which will host all the duplicated steering rules to be forwarded to mlx5e
netdevice
receive path.
RoCE sniffer module:
RoCE sniffer module will register to (RoCE/RDMA) user space traffic steering
namespaces add/del
rules notification.
- On rule add it will generated an identical rule and inject it into the
SNIFFER_NAMESPACE
flow table with flow tag = "OFFLOAD" and destination = "mlx5e netdevice"
- On rule delete it will remove the duplicated corresponding sniffer rule.
Thanks,
Saeed.
Huy Nguyen (3):
net/mlx5e: Set sniffer skbs packet type to offload kernel
net/mlx5e: Sniffer support for kernel offload (RoCE) traffic
net/mlx5e: Add netdev hw feature flag offload-sniffer
Maor Gottlieb (15):
net/mlx5: Refactor mlx5_add_flow_rule
net/mlx5: Introduce mlx5_flow_steering structure
net/mlx5: Properly remove all steering objects
net/mlx5: Add hold/put rules refcount API
net/mlx5: Add support to add/del flow rule notifiers
net/mlx5: Introduce table of function pointer steering commands
net/mlx5: Introduce nop steering commands
if_ether.h: Add RoCE Ethertype
IB/mlx5: Create RoCE root namespace
net/mlx5: Introduce get flow rule match API
net/mlx5: Add sniffer namespaces
IB/mlx5: Add kernel offload flow-tag
net: Add offload kernel net stack packet type
net/mlx5: Introduce sniffer steering hardware capabilities
net/mlx5e: Lock device state in set features
drivers/infiniband/hw/mlx4/qp.c | 6 +-
drivers/infiniband/hw/mlx5/main.c | 143 +++-
drivers/infiniband/hw/mlx5/mlx5_ib.h | 15 +-
drivers/infiniband/hw/ocrdma/ocrdma_ah.c | 4 +-
drivers/infiniband/hw/ocrdma/ocrdma_hw.c | 2 +-
drivers/infiniband/hw/ocrdma/ocrdma_sli.h | 4 -
drivers/infiniband/hw/usnic/usnic_common_pkt_hdr.h | 1 -
drivers/infiniband/hw/usnic/usnic_fwd.h | 2 +-
drivers/net/ethernet/mellanox/mlx5/core/Makefile | 3 +-
drivers/net/ethernet/mellanox/mlx5/core/en.h | 10 +
drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c | 26 +-
drivers/net/ethernet/mellanox/mlx5/core/en_fs.c | 28 +-
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 44 +-
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 4 +
.../net/ethernet/mellanox/mlx5/core/en_sniffer.c | 574 ++++++++++++++++
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 8 +-
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 51 +-
drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c | 161 ++++-
drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.h | 71 +-
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 746 ++++++++++++++-------
drivers/net/ethernet/mellanox/mlx5/core/fs_core.h | 31 +
include/linux/mlx5/device.h | 17 +
include/linux/mlx5/driver.h | 6 +-
include/linux/mlx5/fs.h | 62 +-
include/linux/netdev_features.h | 2 +
include/linux/skbuff.h | 6 +-
include/uapi/linux/if_ether.h | 1 +
include/uapi/linux/if_packet.h | 1 +
net/core/dev.c | 4 +
net/core/ethtool.c | 1 +
30 files changed, 1626 insertions(+), 408 deletions(-)
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en_sniffer.c
--
2.8.0
