nf_tables: remove struct nft_af_info

This is a follow up after the RFC patchset posted in late December [1].

This patch gets rid of quite a bit of complexity by removing the family layer and it saves us 64 bytes per netns. Families are basically defining the default filter chain hooks, that can be placed in the filter chain definition instead. Then, there is already a hook validation field that is redundant these days and some fields that are very much specific of NFPROTO_NETDEV that we can also remove.

Result is less code to maintain (~500 LOC), and hence more simple infrastructure.

No functional changes after this patchset.

[1] https://marc.info/?l=netfilter-devel&m=151467563814063&w=2

Pablo Neira Ayuso (7):
netfilter: nf_tables: remove nhooks field from struct nft_af_info
netfilter: nf_tables: remove flag field from struct nft_af_info
netfilter: nf_tables: no need for struct nft_af_info to enable/disable table
netfilter: nf_tables: remove struct nft_af_info parameter in nf_tables_chain_type_lookup()
netfilter: nf_tables: add single table list for all families
netfilter: nf_tables: get rid of pernet families
netfilter: nf_tables: get rid of struct nft_af_info abstraction

 include/net/netfilter/nf_tables.h       |  37 +-
 include/net/netns/nftables.h            |   8 +-
 net/bridge/netfilter/nf_tables_bridge.c |  54 +--
 net/ipv4/netfilter/nf_tables_arp.c      |  49 +-
 net/ipv4/netfilter/nf_tables_ipv4.c     |  49 +-
 net/ipv6/netfilter/nf_tables_ipv6.c     |  49 +-
 net/netfilter/nf_tables_api.c           | 787 ++++++++++++--------------------
 net/netfilter/nf_tables_inet.c          |  49 +-
 net/netfilter/nf_tables_netdev.c        |  70 +--
 net/netfilter/nft_compat.c              |  16 +-
 net/netfilter/nft_ct.c                  |  16 +-
 net/netfilter/nft_flow_offload.c        |   4 +-
 net/netfilter/nft_log.c                 |   4 +-
 net/netfilter/nft_masq.c                |   2 +-
 net/netfilter/nft_meta.c                |   4 +-
 net/netfilter/nft_nat.c                 |   2 +-
 net/netfilter/nft_redir.c               |   2 +-
 17 files changed, 348 insertions(+), 854 deletions(-)

2.11.0