[net-next,00/11] net: use netdev->lock to protect NAPI

Message

Jakub Kicinski Jan. 14, 2025, 3:51 a.m. UTC

We recently added a lock member to struct net_device, with a vague
plan to start using it to protect netdev-local state, removing
the need to take rtnl_lock for new configuration APIs.

Lay some groundwork and use this lock for protecting NAPI APIs.

Jakub Kicinski (11):
  net: add netdev_lock() / netdev_unlock() helpers
  net: add helpers for lookup and walking netdevs under netdev_lock()
  net: make netdev_lock() protect netdev->reg_state
  net: add netdev->up protected by netdev_lock()
  net: protect netdev->napi_list with netdev_lock()
  net: protect NAPI enablement with netdev_lock()
  net: make netdev netlink ops hold netdev_lock()
  net: protect threaded status of NAPI with netdev_lock()
  net: protect napi->irq with netdev_lock()
  net: protect NAPI config fields with netdev_lock()
  netdev-genl: remove rtnl_lock protection from NAPI ops

 include/linux/netdevice.h                   | 117 +++++++++++--
 net/core/dev.h                              |  29 +++-
 drivers/net/ethernet/amd/pcnet32.c          |  11 +-
 drivers/net/ethernet/intel/iavf/iavf_main.c |  84 ++++-----
 drivers/net/ethernet/marvell/mvneta.c       |   5 +-
 drivers/net/ethernet/via/via-velocity.c     |   4 +-
 drivers/net/netdevsim/ethtool.c             |   4 +-
 net/core/dev.c                              | 183 ++++++++++++++++++--
 net/core/net-sysfs.c                        |  37 +++-
 net/core/netdev-genl.c                      |  56 +++---
 net/shaper/shaper.c                         |   6 +-
 11 files changed, 417 insertions(+), 119 deletions(-)