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, |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 28 | struct nft_regs *regs, |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 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; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 34 | u32 *dest = ®s->data[priv->dreg]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 35 | |
| 36 | switch (priv->key) { |
| 37 | case NFT_META_LEN: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 38 | *dest = skb->len; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 39 | break; |
| 40 | case NFT_META_PROTOCOL: |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 41 | *dest = 0; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 42 | *(__be16 *)dest = skb->protocol; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 43 | break; |
Patrick McHardy | 124edfa | 2014-01-03 12:16:17 +0000 | [diff] [blame] | 44 | case NFT_META_NFPROTO: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 45 | *dest = pkt->ops->pf; |
Patrick McHardy | 124edfa | 2014-01-03 12:16:17 +0000 | [diff] [blame] | 46 | break; |
Patrick McHardy | 4566bf2 | 2014-01-03 12:16:18 +0000 | [diff] [blame] | 47 | case NFT_META_L4PROTO: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 48 | *dest = pkt->tprot; |
Patrick McHardy | 4566bf2 | 2014-01-03 12:16:18 +0000 | [diff] [blame] | 49 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 50 | case NFT_META_PRIORITY: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 51 | *dest = skb->priority; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 52 | break; |
| 53 | case NFT_META_MARK: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 54 | *dest = skb->mark; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 55 | break; |
| 56 | case NFT_META_IIF: |
| 57 | if (in == NULL) |
| 58 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 59 | *dest = in->ifindex; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 60 | break; |
| 61 | case NFT_META_OIF: |
| 62 | if (out == NULL) |
| 63 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 64 | *dest = out->ifindex; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 65 | break; |
| 66 | case NFT_META_IIFNAME: |
| 67 | if (in == NULL) |
| 68 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 69 | strncpy((char *)dest, in->name, IFNAMSIZ); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 70 | break; |
| 71 | case NFT_META_OIFNAME: |
| 72 | if (out == NULL) |
| 73 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 74 | strncpy((char *)dest, out->name, IFNAMSIZ); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 75 | break; |
| 76 | case NFT_META_IIFTYPE: |
| 77 | if (in == NULL) |
| 78 | goto err; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 79 | *dest = 0; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 80 | *(u16 *)dest = in->type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 81 | break; |
| 82 | case NFT_META_OIFTYPE: |
| 83 | if (out == NULL) |
| 84 | goto err; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 85 | *dest = 0; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 86 | *(u16 *)dest = out->type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 87 | break; |
| 88 | case NFT_META_SKUID: |
Eric Dumazet | a839923 | 2015-03-16 21:06:15 -0700 | [diff] [blame] | 89 | if (skb->sk == NULL || !sk_fullsock(skb->sk)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 90 | goto err; |
| 91 | |
| 92 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 93 | if (skb->sk->sk_socket == NULL || |
| 94 | skb->sk->sk_socket->file == NULL) { |
| 95 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 96 | goto err; |
| 97 | } |
| 98 | |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 99 | *dest = from_kuid_munged(&init_user_ns, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 100 | skb->sk->sk_socket->file->f_cred->fsuid); |
| 101 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 102 | break; |
| 103 | case NFT_META_SKGID: |
Eric Dumazet | a839923 | 2015-03-16 21:06:15 -0700 | [diff] [blame] | 104 | if (skb->sk == NULL || !sk_fullsock(skb->sk)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 105 | goto err; |
| 106 | |
| 107 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 108 | if (skb->sk->sk_socket == NULL || |
| 109 | skb->sk->sk_socket->file == NULL) { |
| 110 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 111 | goto err; |
| 112 | } |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 113 | *dest = from_kgid_munged(&init_user_ns, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 114 | skb->sk->sk_socket->file->f_cred->fsgid); |
| 115 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 116 | break; |
Paul Bolle | 06efbd6 | 2014-02-12 10:53:01 +0100 | [diff] [blame] | 117 | #ifdef CONFIG_IP_ROUTE_CLASSID |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 118 | case NFT_META_RTCLASSID: { |
| 119 | const struct dst_entry *dst = skb_dst(skb); |
| 120 | |
| 121 | if (dst == NULL) |
| 122 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 123 | *dest = dst->tclassid; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 124 | break; |
| 125 | } |
| 126 | #endif |
| 127 | #ifdef CONFIG_NETWORK_SECMARK |
| 128 | case NFT_META_SECMARK: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 129 | *dest = skb->secmark; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 130 | break; |
| 131 | #endif |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 132 | case NFT_META_PKTTYPE: |
| 133 | if (skb->pkt_type != PACKET_LOOPBACK) { |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 134 | *dest = skb->pkt_type; |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 135 | break; |
| 136 | } |
| 137 | |
| 138 | switch (pkt->ops->pf) { |
| 139 | case NFPROTO_IPV4: |
| 140 | if (ipv4_is_multicast(ip_hdr(skb)->daddr)) |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 141 | *dest = PACKET_MULTICAST; |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 142 | else |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 143 | *dest = PACKET_BROADCAST; |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 144 | break; |
| 145 | case NFPROTO_IPV6: |
| 146 | if (ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF) |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 147 | *dest = PACKET_MULTICAST; |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 148 | else |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 149 | *dest = PACKET_BROADCAST; |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 150 | break; |
| 151 | default: |
| 152 | WARN_ON(1); |
| 153 | goto err; |
| 154 | } |
| 155 | break; |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 156 | case NFT_META_CPU: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 157 | *dest = raw_smp_processor_id(); |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 158 | break; |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 159 | case NFT_META_IIFGROUP: |
| 160 | if (in == NULL) |
| 161 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 162 | *dest = in->group; |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 163 | break; |
| 164 | case NFT_META_OIFGROUP: |
| 165 | if (out == NULL) |
| 166 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 167 | *dest = out->group; |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 168 | break; |
Ana Rey | ce67417 | 2014-11-03 18:10:50 +0100 | [diff] [blame] | 169 | case NFT_META_CGROUP: |
Pablo Neira Ayuso | c5035c7 | 2015-03-27 12:14:13 +0100 | [diff] [blame] | 170 | if (skb->sk == NULL || !sk_fullsock(skb->sk)) |
| 171 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 172 | *dest = skb->sk->sk_classid; |
Ana Rey | ce67417 | 2014-11-03 18:10:50 +0100 | [diff] [blame] | 173 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 174 | default: |
| 175 | WARN_ON(1); |
| 176 | goto err; |
| 177 | } |
| 178 | return; |
| 179 | |
| 180 | err: |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 181 | regs->verdict.code = NFT_BREAK; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 182 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 183 | EXPORT_SYMBOL_GPL(nft_meta_get_eval); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 184 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 185 | void nft_meta_set_eval(const struct nft_expr *expr, |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 186 | struct nft_regs *regs, |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 187 | const struct nft_pktinfo *pkt) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 188 | { |
| 189 | const struct nft_meta *meta = nft_expr_priv(expr); |
| 190 | struct sk_buff *skb = pkt->skb; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 191 | u32 value = regs->data[meta->sreg]; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 192 | |
| 193 | switch (meta->key) { |
| 194 | case NFT_META_MARK: |
| 195 | skb->mark = value; |
| 196 | break; |
| 197 | case NFT_META_PRIORITY: |
| 198 | skb->priority = value; |
| 199 | break; |
| 200 | case NFT_META_NFTRACE: |
| 201 | skb->nf_trace = 1; |
| 202 | break; |
| 203 | default: |
| 204 | WARN_ON(1); |
| 205 | } |
| 206 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 207 | EXPORT_SYMBOL_GPL(nft_meta_set_eval); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 208 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 209 | const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 210 | [NFTA_META_DREG] = { .type = NLA_U32 }, |
| 211 | [NFTA_META_KEY] = { .type = NLA_U32 }, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 212 | [NFTA_META_SREG] = { .type = NLA_U32 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 213 | }; |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 214 | EXPORT_SYMBOL_GPL(nft_meta_policy); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 215 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 216 | int nft_meta_get_init(const struct nft_ctx *ctx, |
| 217 | const struct nft_expr *expr, |
| 218 | const struct nlattr * const tb[]) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 219 | { |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 220 | struct nft_meta *priv = nft_expr_priv(expr); |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 221 | unsigned int len; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 222 | |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 223 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
| 224 | switch (priv->key) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 225 | case NFT_META_PROTOCOL: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 226 | case NFT_META_IIFTYPE: |
| 227 | case NFT_META_OIFTYPE: |
| 228 | len = sizeof(u16); |
| 229 | break; |
Patrick McHardy | 124edfa | 2014-01-03 12:16:17 +0000 | [diff] [blame] | 230 | case NFT_META_NFPROTO: |
Patrick McHardy | 4566bf2 | 2014-01-03 12:16:18 +0000 | [diff] [blame] | 231 | case NFT_META_L4PROTO: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 232 | case NFT_META_LEN: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 233 | case NFT_META_PRIORITY: |
| 234 | case NFT_META_MARK: |
| 235 | case NFT_META_IIF: |
| 236 | case NFT_META_OIF: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 237 | case NFT_META_SKUID: |
| 238 | case NFT_META_SKGID: |
Paul Bolle | 06efbd6 | 2014-02-12 10:53:01 +0100 | [diff] [blame] | 239 | #ifdef CONFIG_IP_ROUTE_CLASSID |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 240 | case NFT_META_RTCLASSID: |
| 241 | #endif |
| 242 | #ifdef CONFIG_NETWORK_SECMARK |
| 243 | case NFT_META_SECMARK: |
| 244 | #endif |
Ana Rey | e2a093f | 2014-08-06 13:52:49 +0200 | [diff] [blame] | 245 | case NFT_META_PKTTYPE: |
Ana Rey | afc5be30 | 2014-08-24 14:08:36 +0200 | [diff] [blame] | 246 | case NFT_META_CPU: |
Ana Rey | 3045d76 | 2014-09-02 20:36:14 +0200 | [diff] [blame] | 247 | case NFT_META_IIFGROUP: |
| 248 | case NFT_META_OIFGROUP: |
Ana Rey | ce67417 | 2014-11-03 18:10:50 +0100 | [diff] [blame] | 249 | case NFT_META_CGROUP: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 250 | len = sizeof(u32); |
| 251 | break; |
| 252 | case NFT_META_IIFNAME: |
| 253 | case NFT_META_OIFNAME: |
| 254 | len = IFNAMSIZ; |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 255 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 256 | default: |
| 257 | return -EOPNOTSUPP; |
| 258 | } |
| 259 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 260 | priv->dreg = nft_parse_register(tb[NFTA_META_DREG]); |
Patrick McHardy | 27e6d20 | 2015-04-11 02:27:29 +0100 | [diff] [blame] | 261 | return nft_validate_register_store(ctx, priv->dreg, NULL, |
| 262 | NFT_DATA_VALUE, len); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 263 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 264 | EXPORT_SYMBOL_GPL(nft_meta_get_init); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 265 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 266 | int nft_meta_set_init(const struct nft_ctx *ctx, |
| 267 | const struct nft_expr *expr, |
| 268 | const struct nlattr * const tb[]) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 269 | { |
| 270 | struct nft_meta *priv = nft_expr_priv(expr); |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 271 | unsigned int len; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 272 | int err; |
| 273 | |
| 274 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 275 | switch (priv->key) { |
| 276 | case NFT_META_MARK: |
| 277 | case NFT_META_PRIORITY: |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 278 | len = sizeof(u32); |
| 279 | break; |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 280 | case NFT_META_NFTRACE: |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 281 | len = sizeof(u8); |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 282 | break; |
| 283 | default: |
| 284 | return -EOPNOTSUPP; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 285 | } |
| 286 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 287 | priv->sreg = nft_parse_register(tb[NFTA_META_SREG]); |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 288 | err = nft_validate_register_load(priv->sreg, len); |
Pablo Neira Ayuso | b38895c | 2014-01-09 20:03:55 +0100 | [diff] [blame] | 289 | if (err < 0) |
| 290 | return err; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 291 | |
| 292 | return 0; |
| 293 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 294 | EXPORT_SYMBOL_GPL(nft_meta_set_init); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 295 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 296 | int nft_meta_get_dump(struct sk_buff *skb, |
| 297 | const struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 298 | { |
| 299 | const struct nft_meta *priv = nft_expr_priv(expr); |
| 300 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 301 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
| 302 | goto nla_put_failure; |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 303 | if (nft_dump_register(skb, NFTA_META_DREG, priv->dreg)) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 304 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 305 | return 0; |
| 306 | |
| 307 | nla_put_failure: |
| 308 | return -1; |
| 309 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 310 | EXPORT_SYMBOL_GPL(nft_meta_get_dump); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 311 | |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 312 | int nft_meta_set_dump(struct sk_buff *skb, |
| 313 | const struct nft_expr *expr) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 314 | { |
| 315 | const struct nft_meta *priv = nft_expr_priv(expr); |
| 316 | |
| 317 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
| 318 | goto nla_put_failure; |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 319 | if (nft_dump_register(skb, NFTA_META_SREG, priv->sreg)) |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 320 | goto nla_put_failure; |
| 321 | |
| 322 | return 0; |
| 323 | |
| 324 | nla_put_failure: |
| 325 | return -1; |
| 326 | } |
Tomasz Bursztyka | aa45660 | 2014-04-14 15:41:27 +0300 | [diff] [blame] | 327 | EXPORT_SYMBOL_GPL(nft_meta_set_dump); |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 328 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 329 | static struct nft_expr_type nft_meta_type; |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 330 | static const struct nft_expr_ops nft_meta_get_ops = { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 331 | .type = &nft_meta_type, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 332 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 333 | .eval = nft_meta_get_eval, |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 334 | .init = nft_meta_get_init, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 335 | .dump = nft_meta_get_dump, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 336 | }; |
| 337 | |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 338 | static const struct nft_expr_ops nft_meta_set_ops = { |
| 339 | .type = &nft_meta_type, |
| 340 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
| 341 | .eval = nft_meta_set_eval, |
Patrick McHardy | d2caa69 | 2014-03-29 10:43:02 +0000 | [diff] [blame] | 342 | .init = nft_meta_set_init, |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 343 | .dump = nft_meta_set_dump, |
| 344 | }; |
| 345 | |
| 346 | static const struct nft_expr_ops * |
| 347 | nft_meta_select_ops(const struct nft_ctx *ctx, |
| 348 | const struct nlattr * const tb[]) |
| 349 | { |
| 350 | if (tb[NFTA_META_KEY] == NULL) |
| 351 | return ERR_PTR(-EINVAL); |
| 352 | |
| 353 | if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG]) |
| 354 | return ERR_PTR(-EINVAL); |
| 355 | |
| 356 | if (tb[NFTA_META_DREG]) |
| 357 | return &nft_meta_get_ops; |
| 358 | |
| 359 | if (tb[NFTA_META_SREG]) |
| 360 | return &nft_meta_set_ops; |
| 361 | |
| 362 | return ERR_PTR(-EINVAL); |
| 363 | } |
| 364 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 365 | static struct nft_expr_type nft_meta_type __read_mostly = { |
| 366 | .name = "meta", |
Arturo Borrero Gonzalez | e035b77 | 2013-12-26 16:38:01 +0100 | [diff] [blame] | 367 | .select_ops = &nft_meta_select_ops, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 368 | .policy = nft_meta_policy, |
| 369 | .maxattr = NFTA_META_MAX, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 370 | .owner = THIS_MODULE, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 371 | }; |
| 372 | |
| 373 | static int __init nft_meta_module_init(void) |
| 374 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 375 | return nft_register_expr(&nft_meta_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | static void __exit nft_meta_module_exit(void) |
| 379 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 380 | nft_unregister_expr(&nft_meta_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | module_init(nft_meta_module_init); |
| 384 | module_exit(nft_meta_module_exit); |
| 385 | |
| 386 | MODULE_LICENSE("GPL"); |
| 387 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 388 | MODULE_ALIAS_NFT_EXPR("meta"); |