[v1,net-next,00/14] net: Convert ->exit_batch_rtnl() to ->exit_rtnl().

Message

Kuniyuki Iwashima April 10, 2025, 2:19 a.m. UTC

While converting nexthop to per-netns RTNL, there are two blockers
to using rtnl_net_dereference(), flush_all_nexthops() and
__unregister_nexthop_notifier(), both of which are called from
->exit_batch_rtnl().

Instead of spreading __rtnl_net_lock() over each ->exit_batch_rtnl(),
we should convert all ->exit_batch_rtnl() to per-net ->exit_rtnl() and
run it under __rtnl_net_lock() because all ->exit_batch_rtnl() functions
do not have anything to factor out for batching.

Patch 1 & 2 factorise the undo mechanism against ->init() into a single
function, and Patch 3 adds ->exit_batch_rtnl().

Patch 4 ~ 13 convert all ->exit_batch_rtnl() users.

Patch 14 removes ->exit_batch_rtnl().

Later, we can convert pfcp and ppp to use ->exit_rtnl().


Kuniyuki Iwashima (14):
  net: Factorise setup_net() and cleanup_net().
  net: Add ops_undo_single for module load/unload.
  net: Add ->exit_rtnl() hook to struct pernet_operations.
  nexthop: Convert nexthop_net_exit_batch_rtnl() to ->exit_rtnl().
  vxlan: Convert vxlan_exit_batch_rtnl() to ->exit_rtnl().
  ipv4: ip_tunnel: Convert ip_tunnel_delete_nets() callers to
    ->exit_rtnl().
  ipv6: Convert tunnel devices' ->exit_batch_rtnl() to ->exit_rtnl().
  xfrm: Convert xfrmi_exit_batch_rtnl() to ->exit_rtnl().
  bridge: Convert br_net_exit_batch_rtnl() to ->exit_rtnl().
  bonding: Convert bond_net_exit_batch_rtnl() to ->exit_rtnl().
  gtp: Convert gtp_net_exit_batch_rtnl() to ->exit_rtnl().
  bareudp: Convert bareudp_exit_batch_rtnl() to ->exit_rtnl().
  geneve: Convert geneve_exit_batch_rtnl() to ->exit_rtnl().
  net: Remove ->exit_batch_rtnl().

 drivers/net/bareudp.c           |  16 +--
 drivers/net/bonding/bond_main.c |  23 ++---
 drivers/net/geneve.c            |  16 +--
 drivers/net/gtp.c               |  18 ++--
 drivers/net/vxlan/vxlan_core.c  |  18 ++--
 include/net/ip_tunnels.h        |   7 +-
 include/net/net_namespace.h     |   4 +-
 net/bridge/br.c                 |  17 ++--
 net/core/net_namespace.c        | 166 +++++++++++++++++---------------
 net/ipv4/ip_gre.c               |  27 +++---
 net/ipv4/ip_tunnel.c            |  25 ++---
 net/ipv4/ip_vti.c               |   9 +-
 net/ipv4/ipip.c                 |   9 +-
 net/ipv4/nexthop.c              |  13 +--
 net/ipv6/ip6_gre.c              |  22 ++---
 net/ipv6/ip6_tunnel.c           |  24 ++---
 net/ipv6/ip6_vti.c              |  27 ++----
 net/ipv6/sit.c                  |  23 ++---
 net/xfrm/xfrm_interface_core.c  |  34 +++----
 19 files changed, 205 insertions(+), 293 deletions(-)