Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1 | /* |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/netlink.h> |
| 15 | #include <linux/netfilter.h> |
| 16 | #include <linux/netfilter/nf_tables.h> |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 17 | #include <linux/in.h> |
| 18 | #include <linux/ip.h> |
| 19 | #include <linux/ipv6.h> |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 20 | #include <linux/smp.h> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 21 | #include <net/dst.h> |
| 22 | #include <net/sock.h> |
| 23 | #include <net/tcp_states.h> /* for TCP_TIME_WAIT */ |
| 24 | #include <net/netfilter/nf_tables.h> |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 25 | #include <net/netfilter/nft_meta.h> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 26 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 27 | void nft_meta_get_eval(const struct nft_expr *expr, |
| 28 | struct nft_data data[NFT_REG_MAX + 1], |
| 29 | const struct nft_pktinfo *pkt) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 30 | { |
| 31 | const struct nft_meta *priv = nft_expr_priv(expr); |
| 32 | const struct sk_buff *skb = pkt->skb; |
| 33 | const struct net_device *in = pkt->in, *out = pkt->out; |
| 34 | struct nft_data *dest = &data[priv->dreg]; |
| 35 | |
| 36 | switch (priv->key) { |
| 37 | case NFT_META_LEN: |
| 38 | dest->data[0] = skb->len; |
| 39 | break; |
| 40 | case NFT_META_PROTOCOL: |
| 41 | *(__be16 *)dest->data = skb->protocol; |
| 42 | break; |
Patrick McHardy | 124edfa | 2014-01-03 12:16:17 +0000 | [diff] [blame] | 43 | case NFT_META_NFPROTO: |
| 44 | dest->data[0] = pkt->ops->pf; |
| 45 | break; |
Patrick McHardy | 4566bf2 | 2014-01-03 12:16:18 +0000 | [diff] [blame] | 46 | case NFT_META_L4PROTO: |
| 47 | dest->data[0] = pkt->tprot; |
| 48 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 49 | case NFT_META_PRIORITY: |
| 50 | dest->data[0] = skb->priority; |
| 51 | break; |
| 52 | case NFT_META_MARK: |
| 53 | dest->data[0] = skb->mark; |
| 54 | break; |
| 55 | case NFT_META_IIF: |
| 56 | if (in == NULL) |
| 57 | goto err; |
| 58 | dest->data[0] = in->ifindex; |
| 59 | break; |
| 60 | case NFT_META_OIF: |
| 61 | if (out == NULL) |
| 62 | goto err; |
| 63 | dest->data[0] = out->ifindex; |
| 64 | break; |
| 65 | case NFT_META_IIFNAME: |
| 66 | if (in == NULL) |
| 67 | goto err; |
| 68 | strncpy((char *)dest->data, in->name, sizeof(dest->data)); |
| 69 | break; |
| 70 | case NFT_META_OIFNAME: |
| 71 | if (out == NULL) |
| 72 | goto err; |
| 73 | strncpy((char *)dest->data, out->name, sizeof(dest->data)); |
| 74 | break; |
| 75 | case NFT_META_IIFTYPE: |
| 76 | if (in == NULL) |
| 77 | goto err; |
| 78 | *(u16 *)dest->data = in->type; |
| 79 | break; |
| 80 | case NFT_META_OIFTYPE: |
| 81 | if (out == NULL) |
| 82 | goto err; |
| 83 | *(u16 *)dest->data = out->type; |
| 84 | break; |
| 85 | case NFT_META_SKUID: |
| 86 | if (skb->sk == NULL || skb->sk->sk_state == TCP_TIME_WAIT) |
| 87 | goto err; |
| 88 | |
| 89 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 90 | if (skb->sk->sk_socket == NULL || |
| 91 | skb->sk->sk_socket->file == NULL) { |
| 92 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 93 | goto err; |
| 94 | } |
| 95 | |
| 96 | dest->data[0] = |
| 97 | from_kuid_munged(&init_user_ns, |
| 98 | skb->sk->sk_socket->file->f_cred->fsuid); |
| 99 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 100 | break; |
| 101 | case NFT_META_SKGID: |
| 102 | if (skb->sk == NULL || skb->sk->sk_state == TCP_TIME_WAIT) |
| 103 | goto err; |
| 104 | |
| 105 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 106 | if (skb->sk->sk_socket == NULL || |
| 107 | skb->sk->sk_socket->file == NULL) { |
| 108 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 109 | goto err; |
| 110 | } |
| 111 | dest->data[0] = |
| 112 | from_kgid_munged(&init_user_ns, |
| 113 | skb->sk->sk_socket->file->f_cred->fsgid); |
| 114 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 115 | break; |
Paul Bolle | 06efbd6 | 2014-02-12 10:53:01 +0100 | [diff] [blame] | 116 | #ifdef CONFIG_IP_ROUTE_CLASSID |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 117 | case NFT_META_RTCLASSID: { |
| 118 | const struct dst_entry *dst = skb_dst(skb); |
| 119 | |
| 120 | if (dst == NULL) |
| 121 | goto err; |
| 122 | dest->data[0] = dst->tclassid; |
| 123 | break; |
| 124 | } |
| 125 | #endif |
| 126 | #ifdef CONFIG_NETWORK_SECMARK |
| 127 | case NFT_META_SECMARK: |
| 128 | dest->data[0] = skb->secmark; |
| 129 | break; |
| 130 | #endif |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 131 | case NFT_META_PKTTYPE: |
| 132 | if (skb->pkt_type != PACKET_LOOPBACK) { |
| 133 | dest->data[0] = skb->pkt_type; |
| 134 | break; |
| 135 | } |
| 136 | |
| 137 | switch (pkt->ops->pf) { |
| 138 | case NFPROTO_IPV4: |
| 139 | if (ipv4_is_multicast(ip_hdr(skb)->daddr)) |
| 140 | dest->data[0] = PACKET_MULTICAST; |
| 141 | else |
| 142 | dest->data[0] = PACKET_BROADCAST; |
| 143 | break; |
| 144 | case NFPROTO_IPV6: |
| 145 | if (ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF) |
| 146 | dest->data[0] = PACKET_MULTICAST; |
| 147 | else |
| 148 | dest->data[0] = PACKET_BROADCAST; |
| 149 | break; |
| 150 | default: |
| 151 | WARN_ON(1); |
| 152 | goto err; |
| 153 | } |
| 154 | break; |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 155 | case NFT_META_CPU: |
| 156 | dest->data[0] = smp_processor_id(); |
| 157 | break; |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 158 | case NFT_META_IIFGROUP: |
| 159 | if (in == NULL) |
| 160 | goto err; |
| 161 | dest->data[0] = in->group; |
| 162 | break; |
| 163 | case NFT_META_OIFGROUP: |
| 164 | if (out == NULL) |
| 165 | goto err; |
| 166 | dest->data[0] = out->group; |
| 167 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 168 | default: |
| 169 | WARN_ON(1); |
| 170 | goto err; |
| 171 | } |
| 172 | return; |
| 173 | |
| 174 | err: |
| 175 | data[NFT_REG_VERDICT].verdict = NFT_BREAK; |
| 176 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 177 | EXPORT_SYMBOL_GPL(nft_meta_get_eval); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 178 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 179 | void nft_meta_set_eval(const struct nft_expr *expr, |
| 180 | struct nft_data data[NFT_REG_MAX + 1], |
| 181 | const struct nft_pktinfo *pkt) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 182 | { |
| 183 | const struct nft_meta *meta = nft_expr_priv(expr); |
| 184 | struct sk_buff *skb = pkt->skb; |
| 185 | u32 value = data[meta->sreg].data[0]; |
| 186 | |
| 187 | switch (meta->key) { |
| 188 | case NFT_META_MARK: |
| 189 | skb->mark = value; |
| 190 | break; |
| 191 | case NFT_META_PRIORITY: |
| 192 | skb->priority = value; |
| 193 | break; |
| 194 | case NFT_META_NFTRACE: |
| 195 | skb->nf_trace = 1; |
| 196 | break; |
| 197 | default: |
| 198 | WARN_ON(1); |
| 199 | } |
| 200 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 201 | EXPORT_SYMBOL_GPL(nft_meta_set_eval); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 202 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 203 | const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 204 | [NFTA_META_DREG] = { .type = NLA_U32 }, |
| 205 | [NFTA_META_KEY] = { .type = NLA_U32 }, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 206 | [NFTA_META_SREG] = { .type = NLA_U32 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 207 | }; |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 208 | EXPORT_SYMBOL_GPL(nft_meta_policy); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 209 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 210 | int nft_meta_get_init(const struct nft_ctx *ctx, |
| 211 | const struct nft_expr *expr, |
| 212 | const struct nlattr * const tb[]) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 213 | { |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 214 | struct nft_meta *priv = nft_expr_priv(expr); |
| 215 | int err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 216 | |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 217 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
| 218 | switch (priv->key) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 219 | case NFT_META_LEN: |
| 220 | case NFT_META_PROTOCOL: |
Patrick McHardy | 124edfa | 2014-01-03 12:16:17 +0000 | [diff] [blame] | 221 | case NFT_META_NFPROTO: |
Patrick McHardy | 4566bf2 | 2014-01-03 12:16:18 +0000 | [diff] [blame] | 222 | case NFT_META_L4PROTO: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 223 | case NFT_META_PRIORITY: |
| 224 | case NFT_META_MARK: |
| 225 | case NFT_META_IIF: |
| 226 | case NFT_META_OIF: |
| 227 | case NFT_META_IIFNAME: |
| 228 | case NFT_META_OIFNAME: |
| 229 | case NFT_META_IIFTYPE: |
| 230 | case NFT_META_OIFTYPE: |
| 231 | case NFT_META_SKUID: |
| 232 | case NFT_META_SKGID: |
Paul Bolle | 06efbd6 | 2014-02-12 10:53:01 +0100 | [diff] [blame] | 233 | #ifdef CONFIG_IP_ROUTE_CLASSID |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 234 | case NFT_META_RTCLASSID: |
| 235 | #endif |
| 236 | #ifdef CONFIG_NETWORK_SECMARK |
| 237 | case NFT_META_SECMARK: |
| 238 | #endif |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 239 | case NFT_META_PKTTYPE: |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 240 | case NFT_META_CPU: |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 241 | case NFT_META_IIFGROUP: |
| 242 | case NFT_META_OIFGROUP: |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 243 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 244 | default: |
| 245 | return -EOPNOTSUPP; |
| 246 | } |
| 247 | |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 248 | priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG])); |
| 249 | err = nft_validate_output_register(priv->dreg); |
| 250 | if (err < 0) |
| 251 | return err; |
| 252 | |
| 253 | err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE); |
| 254 | if (err < 0) |
| 255 | return err; |
| 256 | |
| 257 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 258 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 259 | EXPORT_SYMBOL_GPL(nft_meta_get_init); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 260 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 261 | int nft_meta_set_init(const struct nft_ctx *ctx, |
| 262 | const struct nft_expr *expr, |
| 263 | const struct nlattr * const tb[]) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 264 | { |
| 265 | struct nft_meta *priv = nft_expr_priv(expr); |
| 266 | int err; |
| 267 | |
| 268 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 269 | switch (priv->key) { |
| 270 | case NFT_META_MARK: |
| 271 | case NFT_META_PRIORITY: |
| 272 | case NFT_META_NFTRACE: |
| 273 | break; |
| 274 | default: |
| 275 | return -EOPNOTSUPP; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 276 | } |
| 277 | |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 278 | priv->sreg = ntohl(nla_get_be32(tb[NFTA_META_SREG])); |
Pablo Neira Ayuso | b38895c | 2014-01-09 20:03:55 +0100 | [diff] [blame] | 279 | err = nft_validate_input_register(priv->sreg); |
| 280 | if (err < 0) |
| 281 | return err; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 282 | |
| 283 | return 0; |
| 284 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 285 | EXPORT_SYMBOL_GPL(nft_meta_set_init); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 286 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 287 | int nft_meta_get_dump(struct sk_buff *skb, |
| 288 | const struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 289 | { |
| 290 | const struct nft_meta *priv = nft_expr_priv(expr); |
| 291 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 292 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
| 293 | goto nla_put_failure; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 294 | if (nla_put_be32(skb, NFTA_META_DREG, htonl(priv->dreg))) |
| 295 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 296 | return 0; |
| 297 | |
| 298 | nla_put_failure: |
| 299 | return -1; |
| 300 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 301 | EXPORT_SYMBOL_GPL(nft_meta_get_dump); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 302 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 303 | int nft_meta_set_dump(struct sk_buff *skb, |
| 304 | const struct nft_expr *expr) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 305 | { |
| 306 | const struct nft_meta *priv = nft_expr_priv(expr); |
| 307 | |
| 308 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
| 309 | goto nla_put_failure; |
| 310 | if (nla_put_be32(skb, NFTA_META_SREG, htonl(priv->sreg))) |
| 311 | goto nla_put_failure; |
| 312 | |
| 313 | return 0; |
| 314 | |
| 315 | nla_put_failure: |
| 316 | return -1; |
| 317 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 318 | EXPORT_SYMBOL_GPL(nft_meta_set_dump); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 319 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 320 | static struct nft_expr_type nft_meta_type; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 321 | static const struct nft_expr_ops nft_meta_get_ops = { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 322 | .type = &nft_meta_type, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 323 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 324 | .eval = nft_meta_get_eval, |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 325 | .init = nft_meta_get_init, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 326 | .dump = nft_meta_get_dump, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 327 | }; |
| 328 | |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 329 | static const struct nft_expr_ops nft_meta_set_ops = { |
| 330 | .type = &nft_meta_type, |
| 331 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
| 332 | .eval = nft_meta_set_eval, |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 333 | .init = nft_meta_set_init, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 334 | .dump = nft_meta_set_dump, |
| 335 | }; |
| 336 | |
| 337 | static const struct nft_expr_ops * |
| 338 | nft_meta_select_ops(const struct nft_ctx *ctx, |
| 339 | const struct nlattr * const tb[]) |
| 340 | { |
| 341 | if (tb[NFTA_META_KEY] == NULL) |
| 342 | return ERR_PTR(-EINVAL); |
| 343 | |
| 344 | if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG]) |
| 345 | return ERR_PTR(-EINVAL); |
| 346 | |
| 347 | if (tb[NFTA_META_DREG]) |
| 348 | return &nft_meta_get_ops; |
| 349 | |
| 350 | if (tb[NFTA_META_SREG]) |
| 351 | return &nft_meta_set_ops; |
| 352 | |
| 353 | return ERR_PTR(-EINVAL); |
| 354 | } |
| 355 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 356 | static struct nft_expr_type nft_meta_type __read_mostly = { |
| 357 | .name = "meta", |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 358 | .select_ops = &nft_meta_select_ops, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 359 | .policy = nft_meta_policy, |
| 360 | .maxattr = NFTA_META_MAX, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 361 | .owner = THIS_MODULE, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 362 | }; |
| 363 | |
| 364 | static int __init nft_meta_module_init(void) |
| 365 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 366 | return nft_register_expr(&nft_meta_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | static void __exit nft_meta_module_exit(void) |
| 370 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 371 | nft_unregister_expr(&nft_meta_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | module_init(nft_meta_module_init); |
| 375 | module_exit(nft_meta_module_exit); |
| 376 | |
| 377 | MODULE_LICENSE("GPL"); |
| 378 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 379 | MODULE_ALIAS_NFT_EXPR("meta"); |