[PATCH net-next v3 00/13] net: sleepable ndo_set_rx_mode

[Stanislav Fomichev <sdf@fomichev.me>]

This series adds a new ndo_set_rx_mode_async callback that enables
drivers to handle address list updates in a sleepable context. The
current ndo_set_rx_mode is called under the netif_addr_lock spinlock
with BHs disabled, which prevents drivers from sleeping. This is
problematic for ops-locked drivers that need to sleep.

The approach:
1. Add snapshot/reconcile infrastructure for address lists
2. Introduce dev_rx_mode_work that takes snapshots under the lock,
   drops the lock, calls the driver, then reconciles changes back
3. Move promiscuity handling into the scheduled work as well
4. Convert existing ops-locked drivers to ndo_set_rx_mode_async
5. Add a warning for ops-locked drivers still using ndo_set_rx_mode
6. Add a selftest exercising the team+bridge+macvlan topology that
   triggers the addr_lock -> ops_lock ordering issue

v3:
- module_export(__rtnl_unlock) (nipa)
- s/netdev_uc_count/netdev_hw_addr_list_count/ in bnxt (Aleksandr)

v2:
- wifi: cfg80211: use __rtnl_unlock in nl80211_pre_doit (syzbot)
- simplify mlx5e_sync_netdev_addr for !uc (Cosmin)
- switch to snapshot in bnxt_cfg_rx_mode (Michael)
- add team to net/config (Jakub)

Stanislav Fomichev (13):
  net: add address list snapshot and reconciliation infrastructure
  wifi: cfg80211: use __rtnl_unlock in nl80211_pre_doit
  net: introduce ndo_set_rx_mode_async and dev_rx_mode_work
  net: move promiscuity handling into dev_rx_mode_work
  fbnic: convert to ndo_set_rx_mode_async
  mlx5: convert to ndo_set_rx_mode_async
  bnxt: convert to ndo_set_rx_mode_async
  bnxt: use snapshot in bnxt_cfg_rx_mode
  iavf: convert to ndo_set_rx_mode_async
  netdevsim: convert to ndo_set_rx_mode_async
  dummy: convert to ndo_set_rx_mode_async
  net: warn ops-locked drivers still using ndo_set_rx_mode
  selftests: net: add team_bridge_macvlan rx_mode test

 Documentation/networking/netdevices.rst       |  12 +
 drivers/net/dummy.c                           |   6 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     |  55 +--
 drivers/net/ethernet/intel/iavf/iavf_main.c   |  14 +-
 .../net/ethernet/mellanox/mlx5/core/en/fs.h   |   5 +-
 .../net/ethernet/mellanox/mlx5/core/en_fs.c   |  30 +-
 .../net/ethernet/mellanox/mlx5/core/en_main.c |  16 +-
 .../net/ethernet/meta/fbnic/fbnic_netdev.c    |  20 +-
 .../net/ethernet/meta/fbnic/fbnic_netdev.h    |   4 +-
 drivers/net/ethernet/meta/fbnic/fbnic_pci.c   |   4 +-
 drivers/net/ethernet/meta/fbnic/fbnic_rpc.c   |   2 +-
 drivers/net/netdevsim/netdev.c                |   8 +-
 include/linux/netdevice.h                     |  26 ++
 net/core/dev.c                                | 176 ++++++++--
 net/core/dev.h                                |   1 +
 net/core/dev_addr_lists.c                     | 110 +++++-
 net/core/dev_addr_lists_test.c                | 321 +++++++++++++++++-
 net/core/rtnetlink.c                          |   1 +
 net/wireless/core.c                           |   1 +
 net/wireless/nl80211.c                        |   2 +-
 tools/testing/selftests/net/config            |   1 +
 tools/testing/selftests/net/rtnetlink.sh      |  44 +++
 22 files changed, 765 insertions(+), 94 deletions(-)

-- 
2.53.0