While looking into what it would take to route packets out to network devices in other network namespaces I started looking at the netfilter hooks, and there is a lot of nasty code to figure out which network namespace to filter the packets in.
Just passing the network namespace into the netfilter hooks looks like a significant simplication in the code, and worth it as the first thing most netfilter hooks do is compute the network namespace. We probably even want per network namespace netfilter hooks as nftables tries (and fails to use). nftables currently has a fairly serious bug where the tables for one network namespace run for packets in all network namespaces. I do not have a fix yet but I think this patchset making it easy to get at the network namespace is a good starting place for a fix. This patshset roots out all of the very weird network namespace computation logic (except for the code in ipvs) and fixes it. I really don't like how the code has been essentially guessing which network namespace to use. Probably the worst guessing is in ipvs in the function skb_net. I have some preliminary changes to fix ipvs but they are not quite ready yet. Cleaning up ipvs enough that I can kill skb_net is on my short list. There are a few extra cleanups sprinkled in as I noticed a few other things as I was sorting out the network namespace computation logic. Eric W. Biederman (15): netfilter: Kill unused copies of RCV_SKB_FAIL netfilter: Pass struct net into the netfilter hooks netfilter: Use nf_hook_state.net ebtables: Simplify the arguments to ebt_do_table inet netfilter: Remove hook from ip6t_do_table, arp_do_table, ipt_do_table inet netfilter: Prefer state->hook to ops->hooknum nftables: kill nft_pktinfo.ops tc: Simplify em_ipset_match x_tables: Pass struct net in xt_action_param x_tables: Use par->net instead of computing from the passed net devices nftables: Pass struct net in nft_pktinfo nf_tables: Use pkt->net instead of computing net from the passed net_devices nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple ipv4: Pass struct net into ip_defrag and ip_check_defrag ipv6: Pass struct net into nf_ct_frag6_gather drivers/net/macvlan.c | 2 +- include/linux/netfilter.h | 37 +++++++++++++++----------- include/linux/netfilter/x_tables.h | 2 ++ include/linux/netfilter_arp/arp_tables.h | 1 - include/linux/netfilter_bridge/ebtables.h | 6 ++--- include/linux/netfilter_ingress.h | 2 +- include/linux/netfilter_ipv4/ip_tables.h | 1 - include/linux/netfilter_ipv6/ip6_tables.h | 1 - include/net/ip.h | 6 ++--- include/net/netfilter/ipv6/nf_defrag_ipv6.h | 2 +- include/net/netfilter/nf_conntrack.h | 3 ++- include/net/netfilter/nf_conntrack_core.h | 1 + include/net/netfilter/nf_conntrack_l4proto.h | 2 +- include/net/netfilter/nf_tables.h | 11 ++++---- include/net/netfilter/nf_tables_ipv4.h | 3 +-- include/net/netfilter/nf_tables_ipv6.h | 3 +-- net/bridge/br_forward.c | 12 ++++----- net/bridge/br_input.c | 13 ++++----- net/bridge/br_multicast.c | 4 +-- net/bridge/br_netfilter.c | 37 ++++++++++++++------------ net/bridge/br_stp_bpdu.c | 4 +-- net/bridge/netfilter/ebt_log.c | 2 +- net/bridge/netfilter/ebt_nflog.c | 2 +- net/bridge/netfilter/ebtable_broute.c | 8 ++++-- net/bridge/netfilter/ebtable_filter.c | 6 ++--- net/bridge/netfilter/ebtable_nat.c | 6 ++--- net/bridge/netfilter/ebtables.c | 14 +++++----- net/bridge/netfilter/nf_tables_bridge.c | 16 +++++------ net/bridge/netfilter/nft_reject_bridge.c | 19 +++++++------ net/decnet/dn_neigh.c | 15 ++++++----- net/decnet/dn_nsp_in.c | 4 +-- net/decnet/dn_route.c | 24 ++++++++--------- net/ipv4/arp.c | 10 ++++--- net/ipv4/ip_forward.c | 11 +++++--- net/ipv4/ip_fragment.c | 8 +++--- net/ipv4/ip_input.c | 30 ++++++++++++--------- net/ipv4/ip_output.c | 28 +++++++++++-------- net/ipv4/ipmr.c | 6 ++--- net/ipv4/netfilter/arp_tables.c | 3 ++- net/ipv4/netfilter/arptable_filter.c | 5 +--- net/ipv4/netfilter/ip_tables.c | 11 ++++---- net/ipv4/netfilter/ipt_CLUSTERIP.c | 2 +- net/ipv4/netfilter/ipt_SYNPROXY.c | 4 +-- net/ipv4/netfilter/ipt_rpfilter.c | 5 ++-- net/ipv4/netfilter/iptable_filter.c | 7 ++--- net/ipv4/netfilter/iptable_mangle.c | 15 +++++------ net/ipv4/netfilter/iptable_nat.c | 4 +-- net/ipv4/netfilter/iptable_raw.c | 7 ++--- net/ipv4/netfilter/iptable_security.c | 8 ++---- net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 4 +-- net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 4 +-- net/ipv4/netfilter/nf_defrag_ipv4.c | 9 ++++--- net/ipv4/netfilter/nf_nat_l3proto_ipv4.c | 14 +++++----- net/ipv4/netfilter/nf_tables_arp.c | 2 +- net/ipv4/netfilter/nf_tables_ipv4.c | 2 +- net/ipv4/netfilter/nft_chain_nat_ipv4.c | 2 +- net/ipv4/netfilter/nft_chain_route_ipv4.c | 2 +- net/ipv4/netfilter/nft_masq_ipv4.c | 2 +- net/ipv4/netfilter/nft_redir_ipv4.c | 2 +- net/ipv4/netfilter/nft_reject_ipv4.c | 5 ++-- net/ipv4/raw.c | 5 ++-- net/ipv4/xfrm4_input.c | 4 +-- net/ipv4/xfrm4_output.c | 6 +++-- net/ipv6/ip6_input.c | 10 +++---- net/ipv6/ip6_output.c | 30 ++++++++++----------- net/ipv6/ip6mr.c | 4 +-- net/ipv6/mcast.c | 7 ++--- net/ipv6/ndisc.c | 4 +-- net/ipv6/netfilter/ip6_tables.c | 11 ++++---- net/ipv6/netfilter/ip6t_REJECT.c | 2 +- net/ipv6/netfilter/ip6t_SYNPROXY.c | 4 +-- net/ipv6/netfilter/ip6t_rpfilter.c | 6 ++--- net/ipv6/netfilter/ip6table_filter.c | 4 +-- net/ipv6/netfilter/ip6table_mangle.c | 14 +++++----- net/ipv6/netfilter/ip6table_nat.c | 4 +-- net/ipv6/netfilter/ip6table_raw.c | 4 +-- net/ipv6/netfilter/ip6table_security.c | 5 +--- net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 4 +-- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 3 ++- net/ipv6/netfilter/nf_conntrack_reasm.c | 4 +-- net/ipv6/netfilter/nf_defrag_ipv6_hooks.c | 5 ++-- net/ipv6/netfilter/nf_nat_l3proto_ipv6.c | 14 +++++----- net/ipv6/netfilter/nf_tables_ipv6.c | 2 +- net/ipv6/netfilter/nft_chain_nat_ipv6.c | 2 +- net/ipv6/netfilter/nft_chain_route_ipv6.c | 2 +- net/ipv6/netfilter/nft_redir_ipv6.c | 3 +-- net/ipv6/netfilter/nft_reject_ipv6.c | 7 +++-- net/ipv6/output_core.c | 6 +++-- net/ipv6/raw.c | 10 ++++--- net/ipv6/xfrm6_input.c | 4 +-- net/ipv6/xfrm6_output.c | 6 +++-- net/netfilter/ipset/ip_set_core.c | 9 +++---- net/netfilter/ipvs/ip_vs_core.c | 2 +- net/netfilter/ipvs/ip_vs_xmit.c | 4 +-- net/netfilter/nf_conntrack_core.c | 10 ++++--- net/netfilter/nf_conntrack_proto_dccp.c | 2 +- net/netfilter/nf_conntrack_proto_generic.c | 2 +- net/netfilter/nf_conntrack_proto_gre.c | 3 +-- net/netfilter/nf_conntrack_proto_sctp.c | 2 +- net/netfilter/nf_conntrack_proto_tcp.c | 2 +- net/netfilter/nf_conntrack_proto_udp.c | 1 + net/netfilter/nf_conntrack_proto_udplite.c | 1 + net/netfilter/nf_tables_core.c | 4 +-- net/netfilter/nf_tables_netdev.c | 16 +++++------ net/netfilter/nfnetlink_log.c | 2 -- net/netfilter/nfnetlink_queue_core.c | 5 +--- net/netfilter/nft_log.c | 3 +-- net/netfilter/nft_meta.c | 4 +-- net/netfilter/nft_queue.c | 2 +- net/netfilter/nft_reject_inet.c | 19 +++++++------ net/netfilter/xt_LOG.c | 2 +- net/netfilter/xt_NFLOG.c | 2 +- net/netfilter/xt_TCPMSS.c | 2 +- net/netfilter/xt_TEE.c | 24 +++-------------- net/netfilter/xt_TPROXY.c | 24 ++++++++--------- net/netfilter/xt_addrtype.c | 4 +-- net/netfilter/xt_connlimit.c | 4 +-- net/netfilter/xt_osf.c | 2 +- net/netfilter/xt_recent.c | 2 +- net/netfilter/xt_socket.c | 14 +++++----- net/packet/af_packet.c | 6 ++--- net/sched/act_connmark.c | 2 +- net/sched/act_ipt.c | 1 + net/sched/em_ipset.c | 5 ++-- net/xfrm/xfrm_output.c | 4 ++- 125 files changed, 426 insertions(+), 442 deletions(-) Eric -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html