[PATCH v3 net-next 0/6] vxlan: convert configuration to RCU and enable lockless dumps

This patch series converts struct vxlan_config to RCU protection, eliminates
redundant destination fields, and enables lockless RTNL-free link dumping
in vxlan_fill_info().

Changes in v3:
- Folded configuration conversion patches into a single patch to maintain
  clean bisectability and avoid intermediate mutable state.
- In vxlan_changelink(), pass lowerdev to vxlan_config_apply() to prevent
  truncating dev->needed_headroom and dev->needed_tailroom when lowerdev
  does not change.
- In vxlan_changelink(), ensure default FDB updates for VNI filters trigger
  when remote_ifindex changes, even if remote_ip is unchanged.
- Pass old and new ifindex to vxlan_vnilist_update_group() and
  vxlan_update_default_fdb_entry() so newly added FDB entries point to
  the new interface and deletions target the old interface.
- Cleaned up redundant NULL checks and unreachable error paths.

Eric Dumazet (6):
  vxlan: vnifilter: use list_for_each_entry_rcu() in
    vxlan_vnifilter_dump_dev()
  vxlan: pass vxlan_config pointer to helper functions
  vxlan: move VXLAN_F_MDB to struct vxlan_dev flags
  vxlan: convert configuration to RCU protection
  vxlan: remove default_dst and use vxlan_config and lowerdev
  vxlan: no longer rely on RTNL in vxlan_fill_info()

 .../mellanox/mlx5/core/en/tc_tun_vxlan.c      |  11 +-
 .../mellanox/mlxsw/spectrum_nve_vxlan.c       |  14 +-
 .../mellanox/mlxsw/spectrum_switchdev.c       |  57 +-
 drivers/net/vxlan/vxlan_core.c                | 717 +++++++++++-------
 drivers/net/vxlan/vxlan_mdb.c                 |  45 +-
 drivers/net/vxlan/vxlan_multicast.c           |  76 +-
 drivers/net/vxlan/vxlan_private.h             |  19 +-
 drivers/net/vxlan/vxlan_vnifilter.c           |  96 ++-
 include/net/vxlan.h                           |  12 +-
 9 files changed, 638 insertions(+), 409 deletions(-)

-- 
2.55.0.1007.g17ff1f9808-goog