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   1 From: Pablo Neira Ayuso <pablo@netfilter.org>
   2 Date: Wed, 31 Jan 2018 18:13:39 +0100
   3 Subject: [PATCH] netfilter: flowtable infrastructure depends on
   4  NETFILTER_INGRESS
   5
   6 config NF_FLOW_TABLE depends on NETFILTER_INGRESS. If users forget to
   7 enable this toggle, flowtable registration fails with EOPNOTSUPP.
   8
   9 Moreover, turn 'select NF_FLOW_TABLE' in every flowtable family flavour
  10 into dependency instead, otherwise this new dependency on
  11 NETFILTER_INGRESS causes a warning. This also allows us to remove the
  12 explicit dependency between family flowtables <-> NF_TABLES and
  13 NF_CONNTRACK, given they depend on the NF_FLOW_TABLE core that already
  14 expresses the general dependencies for this new infrastructure.
  15
  16 Moreover, NF_FLOW_TABLE_INET depends on NF_FLOW_TABLE_IPV4 and
  17 NF_FLOWTABLE_IPV6, which already depends on NF_FLOW_TABLE. So we can get
  18 rid of direct dependency with NF_FLOW_TABLE.
  19
  20 In general, let's avoid 'select', it just makes things more complicated.
  21
  22 Reported-by: John Crispin <john@phrozen.org>
  23 Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  24 ---
  25
  26 --- a/net/ipv4/netfilter/Kconfig
  27 +++ b/net/ipv4/netfilter/Kconfig
  28 @@ -80,8 +80,7 @@ endif # NF_TABLES
  29
  30  config NF_FLOW_TABLE_IPV4
  31         tristate "Netfilter flow table IPv4 module"
  32 -       depends on NF_CONNTRACK && NF_TABLES
  33 -       select NF_FLOW_TABLE
  34 +       depends on NF_FLOW_TABLE
  35         help
  36           This option adds the flow table IPv4 support.
  37
  38 --- a/net/ipv6/netfilter/Kconfig
  39 +++ b/net/ipv6/netfilter/Kconfig
  40 @@ -101,8 +101,7 @@ endif # NF_TABLES
  41
  42  config NF_FLOW_TABLE_IPV6
  43         tristate "Netfilter flow table IPv6 module"
  44 -       depends on NF_CONNTRACK && NF_TABLES
  45 -       select NF_FLOW_TABLE
  46 +       depends on NF_FLOW_TABLE
  47         help
  48           This option adds the flow table IPv6 support.
  49
  50 --- a/net/netfilter/Kconfig
  51 +++ b/net/netfilter/Kconfig
  52 @@ -676,8 +676,8 @@ endif # NF_TABLES
  53
  54  config NF_FLOW_TABLE_INET
  55         tristate "Netfilter flow table mixed IPv4/IPv6 module"
  56 -       depends on NF_FLOW_TABLE_IPV4 && NF_FLOW_TABLE_IPV6
  57 -       select NF_FLOW_TABLE
  58 +       depends on NF_FLOW_TABLE_IPV4
  59 +       depends on NF_FLOW_TABLE_IPV6
  60         help
  61            This option adds the flow table mixed IPv4/IPv6 support.
  62
  63 @@ -685,7 +685,9 @@ config NF_FLOW_TABLE_INET
  64
  65  config NF_FLOW_TABLE
  66         tristate "Netfilter flow table module"
  67 -       depends on NF_CONNTRACK && NF_TABLES
  68 +       depends on NETFILTER_INGRESS
  69 +       depends on NF_CONNTRACK
  70 +       depends on NF_TABLES
  71         help
  72           This option adds the flow table core infrastructure.
  73