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   1 From: Pablo Neira Ayuso <pablo@netfilter.org>
   2 Date: Sat, 9 Dec 2017 15:43:17 +0100
   3 Subject: [PATCH] netfilter: nf_tables: remove hooks from family definition
   4
   5 They don't belong to the family definition, move them to the filter
   6 chain type definition instead.
   7
   8 Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
   9 ---
  10
  11 --- a/include/net/netfilter/nf_tables.h
  12 +++ b/include/net/netfilter/nf_tables.h
  13 @@ -878,7 +878,7 @@ enum nft_chain_type {
  14   *     @family: address family
  15   *     @owner: module owner
  16   *     @hook_mask: mask of valid hooks
  17 - *     @hooks: hookfn overrides
  18 + *     @hooks: array of hook functions
  19   */
  20  struct nf_chain_type {
  21         const char                      *name;
  22 @@ -972,7 +972,6 @@ enum nft_af_flags {
  23   *     @owner: module owner
  24   *     @tables: used internally
  25   *     @flags: family flags
  26 - *     @hooks: hookfn overrides for packet validation
  27   */
  28  struct nft_af_info {
  29         struct list_head                list;
  30 @@ -981,7 +980,6 @@ struct nft_af_info {
  31         struct module                   *owner;
  32         struct list_head                tables;
  33         u32                             flags;
  34 -       nf_hookfn                       *hooks[NF_MAX_HOOKS];
  35  };
  36
  37  int nft_register_afinfo(struct net *, struct nft_af_info *);
  38 --- a/net/bridge/netfilter/nf_tables_bridge.c
  39 +++ b/net/bridge/netfilter/nf_tables_bridge.c
  40 @@ -46,13 +46,6 @@ static struct nft_af_info nft_af_bridge
  41         .family         = NFPROTO_BRIDGE,
  42         .nhooks         = NF_BR_NUMHOOKS,
  43         .owner          = THIS_MODULE,
  44 -       .hooks          = {
  45 -               [NF_BR_PRE_ROUTING]     = nft_do_chain_bridge,
  46 -               [NF_BR_LOCAL_IN]        = nft_do_chain_bridge,
  47 -               [NF_BR_FORWARD]         = nft_do_chain_bridge,
  48 -               [NF_BR_LOCAL_OUT]       = nft_do_chain_bridge,
  49 -               [NF_BR_POST_ROUTING]    = nft_do_chain_bridge,
  50 -       },
  51  };
  52
  53  static int nf_tables_bridge_init_net(struct net *net)
  54 @@ -93,6 +86,13 @@ static const struct nf_chain_type filter
  55                           (1 << NF_BR_FORWARD) |
  56                           (1 << NF_BR_LOCAL_OUT) |
  57                           (1 << NF_BR_POST_ROUTING),
  58 +       .hooks          = {
  59 +               [NF_BR_PRE_ROUTING]     = nft_do_chain_bridge,
  60 +               [NF_BR_LOCAL_IN]        = nft_do_chain_bridge,
  61 +               [NF_BR_FORWARD]         = nft_do_chain_bridge,
  62 +               [NF_BR_LOCAL_OUT]       = nft_do_chain_bridge,
  63 +               [NF_BR_POST_ROUTING]    = nft_do_chain_bridge,
  64 +       },
  65  };
  66
  67  static int __init nf_tables_bridge_init(void)
  68 --- a/net/ipv4/netfilter/nf_tables_arp.c
  69 +++ b/net/ipv4/netfilter/nf_tables_arp.c
  70 @@ -31,10 +31,6 @@ static struct nft_af_info nft_af_arp __r
  71         .family         = NFPROTO_ARP,
  72         .nhooks         = NF_ARP_NUMHOOKS,
  73         .owner          = THIS_MODULE,
  74 -       .hooks          = {
  75 -               [NF_ARP_IN]             = nft_do_chain_arp,
  76 -               [NF_ARP_OUT]            = nft_do_chain_arp,
  77 -       },
  78  };
  79
  80  static int nf_tables_arp_init_net(struct net *net)
  81 @@ -72,6 +68,10 @@ static const struct nf_chain_type filter
  82         .owner          = THIS_MODULE,
  83         .hook_mask      = (1 << NF_ARP_IN) |
  84                           (1 << NF_ARP_OUT),
  85 +       .hooks          = {
  86 +               [NF_ARP_IN]             = nft_do_chain_arp,
  87 +               [NF_ARP_OUT]            = nft_do_chain_arp,
  88 +       },
  89  };
  90
  91  static int __init nf_tables_arp_init(void)
  92 --- a/net/ipv4/netfilter/nf_tables_ipv4.c
  93 +++ b/net/ipv4/netfilter/nf_tables_ipv4.c
  94 @@ -49,13 +49,6 @@ static struct nft_af_info nft_af_ipv4 __
  95         .family         = NFPROTO_IPV4,
  96         .nhooks         = NF_INET_NUMHOOKS,
  97         .owner          = THIS_MODULE,
  98 -       .hooks          = {
  99 -               [NF_INET_LOCAL_IN]      = nft_do_chain_ipv4,
 100 -               [NF_INET_LOCAL_OUT]     = nft_ipv4_output,
 101 -               [NF_INET_FORWARD]       = nft_do_chain_ipv4,
 102 -               [NF_INET_PRE_ROUTING]   = nft_do_chain_ipv4,
 103 -               [NF_INET_POST_ROUTING]  = nft_do_chain_ipv4,
 104 -       },
 105  };
 106
 107  static int nf_tables_ipv4_init_net(struct net *net)
 108 @@ -96,6 +89,13 @@ static const struct nf_chain_type filter
 109                           (1 << NF_INET_FORWARD) |
 110                           (1 << NF_INET_PRE_ROUTING) |
 111                           (1 << NF_INET_POST_ROUTING),
 112 +       .hooks          = {
 113 +               [NF_INET_LOCAL_IN]      = nft_do_chain_ipv4,
 114 +               [NF_INET_LOCAL_OUT]     = nft_ipv4_output,
 115 +               [NF_INET_FORWARD]       = nft_do_chain_ipv4,
 116 +               [NF_INET_PRE_ROUTING]   = nft_do_chain_ipv4,
 117 +               [NF_INET_POST_ROUTING]  = nft_do_chain_ipv4,
 118 +       },
 119  };
 120
 121  static int __init nf_tables_ipv4_init(void)
 122 --- a/net/ipv6/netfilter/nf_tables_ipv6.c
 123 +++ b/net/ipv6/netfilter/nf_tables_ipv6.c
 124 @@ -46,13 +46,6 @@ static struct nft_af_info nft_af_ipv6 __
 125         .family         = NFPROTO_IPV6,
 126         .nhooks         = NF_INET_NUMHOOKS,
 127         .owner          = THIS_MODULE,
 128 -       .hooks          = {
 129 -               [NF_INET_LOCAL_IN]      = nft_do_chain_ipv6,
 130 -               [NF_INET_LOCAL_OUT]     = nft_ipv6_output,
 131 -               [NF_INET_FORWARD]       = nft_do_chain_ipv6,
 132 -               [NF_INET_PRE_ROUTING]   = nft_do_chain_ipv6,
 133 -               [NF_INET_POST_ROUTING]  = nft_do_chain_ipv6,
 134 -       },
 135  };
 136
 137  static int nf_tables_ipv6_init_net(struct net *net)
 138 @@ -93,6 +86,13 @@ static const struct nf_chain_type filter
 139                           (1 << NF_INET_FORWARD) |
 140                           (1 << NF_INET_PRE_ROUTING) |
 141                           (1 << NF_INET_POST_ROUTING),
 142 +       .hooks          = {
 143 +               [NF_INET_LOCAL_IN]      = nft_do_chain_ipv6,
 144 +               [NF_INET_LOCAL_OUT]     = nft_ipv6_output,
 145 +               [NF_INET_FORWARD]       = nft_do_chain_ipv6,
 146 +               [NF_INET_PRE_ROUTING]   = nft_do_chain_ipv6,
 147 +               [NF_INET_POST_ROUTING]  = nft_do_chain_ipv6,
 148 +       },
 149  };
 150
 151  static int __init nf_tables_ipv6_init(void)
 152 --- a/net/netfilter/nf_tables_api.c
 153 +++ b/net/netfilter/nf_tables_api.c
 154 @@ -1398,7 +1398,6 @@ static int nf_tables_addchain(struct nft
 155         if (nla[NFTA_CHAIN_HOOK]) {
 156                 struct nft_chain_hook hook;
 157                 struct nf_hook_ops *ops;
 158 -               nf_hookfn *hookfn;
 159
 160                 err = nft_chain_parse_hook(net, nla, afi, &hook, create);
 161                 if (err < 0)
 162 @@ -1424,7 +1423,6 @@ static int nf_tables_addchain(struct nft
 163                         static_branch_inc(&nft_counters_enabled);
 164                 }
 165
 166 -               hookfn = hook.type->hooks[hook.num];
 167                 basechain->type = hook.type;
 168                 chain = &basechain->chain;
 169
 170 @@ -1433,10 +1431,8 @@ static int nf_tables_addchain(struct nft
 171                 ops->hooknum    = hook.num;
 172                 ops->priority   = hook.priority;
 173                 ops->priv       = chain;
 174 -               ops->hook       = afi->hooks[ops->hooknum];
 175 +               ops->hook       = hook.type->hooks[ops->hooknum];
 176                 ops->dev        = hook.dev;
 177 -               if (hookfn)
 178 -                       ops->hook = hookfn;
 179
 180                 if (basechain->type->type == NFT_CHAIN_T_NAT)
 181                         ops->nat_hook = true;
 182 --- a/net/netfilter/nf_tables_inet.c
 183 +++ b/net/netfilter/nf_tables_inet.c
 184 @@ -74,13 +74,6 @@ static struct nft_af_info nft_af_inet __
 185         .family         = NFPROTO_INET,
 186         .nhooks         = NF_INET_NUMHOOKS,
 187         .owner          = THIS_MODULE,
 188 -       .hooks          = {
 189 -               [NF_INET_LOCAL_IN]      = nft_do_chain_inet,
 190 -               [NF_INET_LOCAL_OUT]     = nft_inet_output,
 191 -               [NF_INET_FORWARD]       = nft_do_chain_inet,
 192 -               [NF_INET_PRE_ROUTING]   = nft_do_chain_inet,
 193 -               [NF_INET_POST_ROUTING]  = nft_do_chain_inet,
 194 -        },
 195  };
 196
 197  static int __net_init nf_tables_inet_init_net(struct net *net)
 198 @@ -121,6 +114,13 @@ static const struct nf_chain_type filter
 199                           (1 << NF_INET_FORWARD) |
 200                           (1 << NF_INET_PRE_ROUTING) |
 201                           (1 << NF_INET_POST_ROUTING),
 202 +       .hooks          = {
 203 +               [NF_INET_LOCAL_IN]      = nft_do_chain_inet,
 204 +               [NF_INET_LOCAL_OUT]     = nft_inet_output,
 205 +               [NF_INET_FORWARD]       = nft_do_chain_inet,
 206 +               [NF_INET_PRE_ROUTING]   = nft_do_chain_inet,
 207 +               [NF_INET_POST_ROUTING]  = nft_do_chain_inet,
 208 +        },
 209  };
 210
 211  static int __init nf_tables_inet_init(void)
 212 --- a/net/netfilter/nf_tables_netdev.c
 213 +++ b/net/netfilter/nf_tables_netdev.c
 214 @@ -43,9 +43,6 @@ static struct nft_af_info nft_af_netdev
 215         .nhooks         = NF_NETDEV_NUMHOOKS,
 216         .owner          = THIS_MODULE,
 217         .flags          = NFT_AF_NEEDS_DEV,
 218 -       .hooks          = {
 219 -               [NF_NETDEV_INGRESS]     = nft_do_chain_netdev,
 220 -       },
 221  };
 222
 223  static int nf_tables_netdev_init_net(struct net *net)
 224 @@ -82,6 +79,9 @@ static const struct nf_chain_type nft_fi
 225         .family         = NFPROTO_NETDEV,
 226         .owner          = THIS_MODULE,
 227         .hook_mask      = (1 << NF_NETDEV_INGRESS),
 228 +       .hooks          = {
 229 +               [NF_NETDEV_INGRESS]     = nft_do_chain_netdev,
 230 +       },
 231  };
 232
 233  static void nft_netdev_event(unsigned long event, struct net_device *dev,