[net,v4,0/4] several fixes for indirect flow_blocks offload

From: wenxu <wenxu@ucloud.cn>

v2:
patch2: store the cb_priv of representor to the flow_block_cb->indr.cb_priv
in the driver. And make the correct check with the statments
this->indr.cb_priv == cb_priv

patch4: del the driver list only in the indriect cleanup callbacks

v3:
add the cover letter and changlogs.

v4:
collapsed 1/4, 2/4, 4/4 in v3 to one fix
Add the prepare patch 1 and 2

This series fixes commit 1fac52da5942 ("net: flow_offload: consolidate
indirect flow_block infrastructure") that revists the flow_block
infrastructure.

patch #1 #2：prepare for fix patch #3
add and use flow_indr_block_cb_alloc/remove function

patch #3: fix flow_indr_dev_unregister path
If the representor is removed, then identify the indirect flow_blocks
that need to be removed by the release callback and the port representor
structure. To identify the port representor structure, a new 
indr.cb_priv field needs to be introduced. The flow_block also needs to
be removed from the driver list from the cleanup path


patch#4 fix block->nooffloaddevcnt warning dmesg log.
When a indr device add in offload success. The block->nooffloaddevcnt
should be 0. After the representor go away. When the dir device go away
the flow_block UNBIND operation with -EOPNOTSUPP which lead the warning
demesg log. 
The block->nooffloaddevcnt should always count for indr block.
even the indr block offload successful. The representor maybe
gone away and the ingress qdisc can work in software mode.


wenxu (4):
  flow_offload: add flow_indr_block_cb_alloc/remove function
  flow_offload: use flow_indr_block_cb_alloc/remove function
  net: flow_offload: fix flow_indr_dev_unregister path
  net/sched: cls_api: fix nooffloaddevcnt warning dmesg log

 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c       | 21 +++---
 .../net/ethernet/mellanox/mlx5/core/en/rep/tc.c    | 24 ++++---
 drivers/net/ethernet/netronome/nfp/flower/main.c   |  2 +-
 drivers/net/ethernet/netronome/nfp/flower/main.h   |  7 +-
 .../net/ethernet/netronome/nfp/flower/offload.c    | 24 ++++---
 include/net/flow_offload.h                         | 21 +++++-
 net/core/flow_offload.c                            | 79 ++++++++++++----------
 net/netfilter/nf_flow_table_offload.c              |  1 +
 net/netfilter/nf_tables_offload.c                  |  1 +
 net/sched/cls_api.c                                | 25 ++++---
 10 files changed, 126 insertions(+), 79 deletions(-)