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
