perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / net / netfilter / nft_redir.c
blobc64cbe78dee7bcb5b0036c6cd8fe66aceb3e004a
1 /*
2 * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org>
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 */
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/netlink.h>
13 #include <linux/netfilter.h>
14 #include <linux/netfilter/nf_tables.h>
15 #include <net/netfilter/nf_nat.h>
16 #include <net/netfilter/nf_tables.h>
17 #include <net/netfilter/nft_redir.h>
19 const struct nla_policy nft_redir_policy[NFTA_REDIR_MAX + 1] = {
20 [NFTA_REDIR_REG_PROTO_MIN] = { .type = NLA_U32 },
21 [NFTA_REDIR_REG_PROTO_MAX] = { .type = NLA_U32 },
22 [NFTA_REDIR_FLAGS] = { .type = NLA_U32 },
24 EXPORT_SYMBOL_GPL(nft_redir_policy);
26 int nft_redir_validate(const struct nft_ctx *ctx,
27 const struct nft_expr *expr,
28 const struct nft_data **data)
30 int err;
32 err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT);
33 if (err < 0)
34 return err;
36 return nft_chain_validate_hooks(ctx->chain,
37 (1 << NF_INET_PRE_ROUTING) |
38 (1 << NF_INET_LOCAL_OUT));
40 EXPORT_SYMBOL_GPL(nft_redir_validate);
42 int nft_redir_init(const struct nft_ctx *ctx,
43 const struct nft_expr *expr,
44 const struct nlattr * const tb[])
46 struct nft_redir *priv = nft_expr_priv(expr);
47 unsigned int plen;
48 int err;
50 plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
51 if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
52 priv->sreg_proto_min =
53 nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MIN]);
55 err = nft_validate_register_load(priv->sreg_proto_min, plen);
56 if (err < 0)
57 return err;
59 if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
60 priv->sreg_proto_max =
61 nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MAX]);
63 err = nft_validate_register_load(priv->sreg_proto_max,
64 plen);
65 if (err < 0)
66 return err;
67 } else {
68 priv->sreg_proto_max = priv->sreg_proto_min;
72 if (tb[NFTA_REDIR_FLAGS]) {
73 priv->flags = ntohl(nla_get_be32(tb[NFTA_REDIR_FLAGS]));
74 if (priv->flags & ~NF_NAT_RANGE_MASK)
75 return -EINVAL;
78 return nf_ct_netns_get(ctx->net, ctx->family);
80 EXPORT_SYMBOL_GPL(nft_redir_init);
82 int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr)
84 const struct nft_redir *priv = nft_expr_priv(expr);
86 if (priv->sreg_proto_min) {
87 if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MIN,
88 priv->sreg_proto_min))
89 goto nla_put_failure;
90 if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MAX,
91 priv->sreg_proto_max))
92 goto nla_put_failure;
95 if (priv->flags != 0 &&
96 nla_put_be32(skb, NFTA_REDIR_FLAGS, htonl(priv->flags)))
97 goto nla_put_failure;
99 return 0;
101 nla_put_failure:
102 return -1;
104 EXPORT_SYMBOL_GPL(nft_redir_dump);
106 MODULE_LICENSE("GPL");
107 MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>");