[PATCH RFC net-next 0/7] netdev_features: start cleaning netdev_features_t up

From: Alexander Lobakin
Date: Fri Apr 05 2024 - 09:39:26 EST

NETDEV_FEATURE_COUNT is currently 64, which means we can't add any new
features as netdev_features_t is u64.
As per several discussions, instead of converting netdev_features_t to
a bitmap, which would mean A LOT of changes, we can try cleaning up
netdev feature bits.
There's a bunch of bits which don't really mean features, rather device
attributes/properties that can't be changed via Ethtool in any of the
drivers. Such attributes can be moved to netdev private flags without
losing any functionality.
Start converting some read-only netdev features to private flags from
the ones that are most obvious, like lockless Tx, inability to change
network namespace etc. I was able to reduce NETDEV_FEATURE_COUNT from
64 to 58, which mean 6 free slots for new features. NETIF_F_NEVER_CHANGE
is gone, so ETHTOOL_A_FEATURES_NOCHANGE Netlink reply will always be 0.
I may've made some mistakes with feature inheriting and also some of
these are compile-tested only, so this is marked as RFC to discuss
the changes. There are obviously more read-only features to convert,
such as HSR (4 bits), this will be done in subsequent series.

Alexander Lobakin (7):
netdev_features: remove unused __UNUSED_NETIF_F_1
netdev_features: convert NETIF_F_LLTX to priv_flag IFF_LLTX
netdevice: introduce IFF_LOGICAL as (IFF_NO_QUEUE | IFF_LLTX)
netdev_features: convert NETIF_F_NETNS_LOCAL to IFF_NETNS_LOCAL
netdev_features: convert NETIF_F_HIGHDMA to priv_flag IFF_HIGHDMA
netdev_features: convert NETIF_F_VLAN_CHALLENGED to
IFF_VLAN_CHALLENGED
netdev_features: convert NETIF_F_FCOE_MTU to IFF_FCOE_MTU

Documentation/driver-api/usb/dma.rst | 2 +-
Documentation/networking/ethtool-netlink.rst | 2 +-
Documentation/networking/netdev-features.rst | 31 +-------------
Documentation/networking/netdevices.rst | 4 +-
Documentation/networking/switchdev.rst | 4 +-
drivers/net/ethernet/tehuti/tehuti.h | 2 +-
include/linux/if_vlan.h | 5 +--
include/linux/netdev_features.h | 26 ++----------
include/linux/netdevice.h | 31 ++++++++++++--
include/net/mac80211.h | 1 +
include/net/net_failover.h | 6 ++-
net/mac80211/ieee80211_i.h | 4 +-
drivers/firewire/net.c | 2 +-
drivers/infiniband/hw/hfi1/vnic_main.c | 3 +-
drivers/infiniband/ulp/ipoib/ipoib_main.c | 3 +-
drivers/net/amt.c | 4 +-
drivers/net/bareudp.c | 3 +-
drivers/net/bonding/bond_main.c | 42 +++++++++----------
drivers/net/dummy.c | 4 +-
drivers/net/ethernet/adaptec/starfire.c | 2 +-
drivers/net/ethernet/adi/adin1110.c | 3 +-
drivers/net/ethernet/aeroflex/greth.c | 3 +-
drivers/net/ethernet/alteon/acenic.c | 2 +-
drivers/net/ethernet/altera/altera_tse_main.c | 3 +-
drivers/net/ethernet/amazon/ena/ena_netdev.c | 5 ++-
drivers/net/ethernet/broadcom/bcmsysport.c | 4 +-
drivers/net/ethernet/broadcom/bnx2.c | 2 +-
.../net/ethernet/broadcom/bnx2x/bnx2x_main.c | 5 +--
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 +--
.../net/ethernet/broadcom/genet/bcmgenet.c | 4 +-
drivers/net/ethernet/broadcom/tg3.c | 2 +-
drivers/net/ethernet/brocade/bna/bnad.c | 9 ++--
drivers/net/ethernet/calxeda/xgmac.c | 4 +-
.../net/ethernet/cavium/liquidio/lio_main.c | 4 +-
.../ethernet/cavium/liquidio/lio_vf_main.c | 4 +-
drivers/net/ethernet/chelsio/cxgb/cxgb2.c | 3 +-
.../net/ethernet/chelsio/cxgb3/cxgb3_main.c | 4 +-
.../net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c | 6 +--
.../net/ethernet/chelsio/cxgb4/cxgb4_main.c | 6 +--
.../ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 6 +--
drivers/net/ethernet/cisco/enic/enic_main.c | 2 +-
drivers/net/ethernet/emulex/benet/be_main.c | 5 +--
.../net/ethernet/freescale/dpaa/dpaa_eth.c | 6 +--
.../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 5 +--
.../net/ethernet/freescale/enetc/enetc_pf.c | 4 +-
.../net/ethernet/freescale/enetc/enetc_vf.c | 3 +-
drivers/net/ethernet/freescale/gianfar.c | 3 +-
.../ethernet/fungible/funeth/funeth_main.c | 5 ++-
drivers/net/ethernet/google/gve/gve_main.c | 2 +-
drivers/net/ethernet/hisilicon/hix5hd2_gmac.c | 4 +-
.../net/ethernet/huawei/hinic/hinic_main.c | 4 +-
drivers/net/ethernet/ibm/ehea/ehea_main.c | 6 +--
drivers/net/ethernet/intel/e100.c | 2 +-
drivers/net/ethernet/intel/e1000/e1000_main.c | 6 +--
drivers/net/ethernet/intel/e1000e/netdev.c | 5 +--
drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 6 +--
drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
drivers/net/ethernet/intel/iavf/iavf_main.c | 3 +-
drivers/net/ethernet/intel/ice/ice_main.c | 5 ++-
drivers/net/ethernet/intel/idpf/idpf_lib.c | 5 ++-
drivers/net/ethernet/intel/igb/igb_main.c | 4 +-
drivers/net/ethernet/intel/igbvf/netdev.c | 3 +-
drivers/net/ethernet/intel/igc/igc_main.c | 4 +-
.../net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 4 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c | 3 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 12 +++---
.../net/ethernet/intel/ixgbe/ixgbe_sriov.c | 4 +-
.../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 +-
drivers/net/ethernet/jme.c | 6 +--
.../ethernet/marvell/prestera/prestera_main.c | 3 +-
drivers/net/ethernet/marvell/skge.c | 2 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
.../net/ethernet/mellanox/mlx4/en_netdev.c | 3 +-
.../net/ethernet/mellanox/mlx5/core/en_main.c | 7 ++--
.../net/ethernet/mellanox/mlx5/core/en_rep.c | 2 +-
.../net/ethernet/mellanox/mlxsw/spectrum.c | 5 ++-
.../net/ethernet/myricom/myri10ge/myri10ge.c | 4 +-
drivers/net/ethernet/natsemi/ns83820.c | 4 +-
drivers/net/ethernet/neterion/s2io.c | 4 +-
.../ethernet/netronome/nfp/nfp_net_common.c | 2 +-
.../net/ethernet/netronome/nfp/nfp_net_repr.c | 5 +--
drivers/net/ethernet/nvidia/forcedeth.c | 4 +-
drivers/net/ethernet/pasemi/pasemi_mac.c | 4 +-
.../net/ethernet/pensando/ionic/ionic_lif.c | 4 +-
.../ethernet/qlogic/netxen/netxen_nic_main.c | 6 +--
drivers/net/ethernet/qlogic/qede/qede_main.c | 6 +--
drivers/net/ethernet/qlogic/qla3xxx.c | 2 +-
.../net/ethernet/qlogic/qlcnic/qlcnic_main.c | 6 +--
.../net/ethernet/qualcomm/rmnet/rmnet_vnd.c | 2 +-
drivers/net/ethernet/realtek/8139cp.c | 5 +--
drivers/net/ethernet/realtek/8139too.c | 3 +-
drivers/net/ethernet/realtek/r8169_main.c | 2 +-
drivers/net/ethernet/rocker/rocker_main.c | 3 +-
.../net/ethernet/samsung/sxgbe/sxgbe_main.c | 4 +-
drivers/net/ethernet/sfc/ef100_netdev.c | 3 +-
drivers/net/ethernet/sfc/ef100_nic.c | 2 +-
drivers/net/ethernet/sfc/ef100_rep.c | 3 +-
drivers/net/ethernet/sfc/efx.c | 4 +-
drivers/net/ethernet/sfc/falcon/efx.c | 3 +-
drivers/net/ethernet/sfc/siena/efx.c | 4 +-
drivers/net/ethernet/sgi/ioc3-eth.c | 3 +-
drivers/net/ethernet/silan/sc92031.c | 4 +-
drivers/net/ethernet/socionext/netsec.c | 3 +-
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 4 +-
drivers/net/ethernet/sun/cassini.c | 2 +-
drivers/net/ethernet/sun/niu.c | 2 +-
drivers/net/ethernet/sun/sungem.c | 2 +-
drivers/net/ethernet/tehuti/tehuti.c | 9 ++--
drivers/net/ethernet/ti/cpsw_new.c | 3 +-
drivers/net/ethernet/toshiba/ps3_gelic_net.c | 3 +-
drivers/net/ethernet/toshiba/spider_net.c | 3 +-
drivers/net/ethernet/tundra/tsi108_eth.c | 2 +-
drivers/net/ethernet/wangxun/ngbe/ngbe_main.c | 2 +-
.../net/ethernet/wangxun/txgbe/txgbe_main.c | 2 +-
drivers/net/ethernet/wiznet/w5100.c | 2 +-
drivers/net/ethernet/wiznet/w5300.c | 2 +-
drivers/net/ethernet/xilinx/ll_temac_main.c | 2 -
drivers/net/geneve.c | 3 +-
drivers/net/gtp.c | 3 +-
drivers/net/hamradio/bpqether.c | 2 +-
drivers/net/hyperv/netvsc_drv.c | 4 +-
drivers/net/ifb.c | 4 +-
drivers/net/ipvlan/ipvlan_main.c | 13 +++---
drivers/net/loopback.c | 8 ++--
drivers/net/macsec.c | 6 +--
drivers/net/macvlan.c | 12 +++---
drivers/net/net_failover.c | 36 ++++++++--------
drivers/net/netdevsim/netdev.c | 6 +--
drivers/net/netkit.c | 6 +--
drivers/net/nlmon.c | 5 +--
drivers/net/ntb_netdev.c | 3 +-
drivers/net/ppp/ppp_generic.c | 2 +-
drivers/net/rionet.c | 2 +-
drivers/net/tap.c | 3 +-
drivers/net/team/team_core.c | 27 ++++++------
drivers/net/thunderbolt/main.c | 3 +-
drivers/net/tun.c | 5 ++-
drivers/net/usb/r8152.c | 5 ++-
drivers/net/veth.c | 6 +--
drivers/net/virtio_net.c | 3 +-
drivers/net/vmxnet3/vmxnet3_drv.c | 3 +-
drivers/net/vrf.c | 17 +++-----
drivers/net/vsockmon.c | 5 +--
drivers/net/vxlan/vxlan_core.c | 3 +-
drivers/net/wireguard/device.c | 5 +--
.../net/wireless/intel/iwlwifi/dvm/mac80211.c | 6 ++-
.../net/wireless/intel/iwlwifi/mvm/mac80211.c | 6 ++-
drivers/net/wwan/t7xx/t7xx_netdev.c | 3 +-
drivers/s390/net/qeth_l2_main.c | 2 +-
drivers/scsi/fcoe/fcoe.c | 4 +-
drivers/staging/octeon/ethernet.c | 2 +-
drivers/usb/fotg210/fotg210-hcd.c | 2 +-
drivers/usb/host/ehci-hcd.c | 2 +-
drivers/usb/host/oxu210hp-hcd.c | 2 +-
lib/test_bpf.c | 3 +-
net/8021q/vlan.c | 2 +-
net/8021q/vlan_dev.c | 8 ++--
net/batman-adv/soft-interface.c | 5 +--
net/bridge/br_device.c | 9 ++--
net/core/dev.c | 34 +++++++++++----
net/core/net-sysfs.c | 3 +-
net/dsa/user.c | 3 +-
net/ethtool/common.c | 5 ---
net/ethtool/features.c | 2 +-
net/ethtool/ioctl.c | 3 +-
net/hsr/hsr_device.c | 19 +++------
net/ieee802154/6lowpan/core.c | 3 +-
net/ieee802154/core.c | 10 ++---
net/ipv4/ip_gre.c | 5 ++-
net/ipv4/ip_tunnel.c | 2 +-
net/ipv4/ip_vti.c | 2 +-
net/ipv4/ipip.c | 3 +-
net/ipv4/ipmr.c | 2 +-
net/ipv6/ip6_gre.c | 8 ++--
net/ipv6/ip6_tunnel.c | 5 +--
net/ipv6/ip6mr.c | 2 +-
net/ipv6/sit.c | 5 +--
net/l2tp/l2tp_eth.c | 2 +-
net/mac80211/iface.c | 2 +
net/openvswitch/vport-internal_dev.c | 12 +++---
net/wireless/core.c | 10 ++---
net/xfrm/xfrm_interface_core.c | 2 +-
tools/testing/selftests/net/forwarding/README | 2 +-
184 files changed, 462 insertions(+), 498 deletions(-)

--
2.44.0