62472bcefb
In order to fix set destruction notifications and get rid of unnecessary members in private data structures, pass the context to expressions' destructor functions again. In order to do so, replace various members in the nft_rule_trans structure by the full context. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
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* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Development of this code funded by Astaro AG (http://www.astaro.com/)
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/netlink.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter/nf_tables.h>
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#include <net/netfilter/nf_tables_core.h>
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#include <net/netfilter/nf_tables.h>
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struct nft_immediate_expr {
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struct nft_data data;
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enum nft_registers dreg:8;
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u8 dlen;
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};
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static void nft_immediate_eval(const struct nft_expr *expr,
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struct nft_data data[NFT_REG_MAX + 1],
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const struct nft_pktinfo *pkt)
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{
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const struct nft_immediate_expr *priv = nft_expr_priv(expr);
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nft_data_copy(&data[priv->dreg], &priv->data);
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}
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static const struct nla_policy nft_immediate_policy[NFTA_IMMEDIATE_MAX + 1] = {
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[NFTA_IMMEDIATE_DREG] = { .type = NLA_U32 },
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[NFTA_IMMEDIATE_DATA] = { .type = NLA_NESTED },
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};
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static int nft_immediate_init(const struct nft_ctx *ctx,
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const struct nft_expr *expr,
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const struct nlattr * const tb[])
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{
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struct nft_immediate_expr *priv = nft_expr_priv(expr);
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struct nft_data_desc desc;
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int err;
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if (tb[NFTA_IMMEDIATE_DREG] == NULL ||
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tb[NFTA_IMMEDIATE_DATA] == NULL)
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return -EINVAL;
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priv->dreg = ntohl(nla_get_be32(tb[NFTA_IMMEDIATE_DREG]));
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err = nft_validate_output_register(priv->dreg);
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if (err < 0)
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return err;
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err = nft_data_init(ctx, &priv->data, &desc, tb[NFTA_IMMEDIATE_DATA]);
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if (err < 0)
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return err;
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priv->dlen = desc.len;
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err = nft_validate_data_load(ctx, priv->dreg, &priv->data, desc.type);
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if (err < 0)
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goto err1;
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return 0;
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err1:
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nft_data_uninit(&priv->data, desc.type);
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return err;
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}
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static void nft_immediate_destroy(const struct nft_ctx *ctx,
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const struct nft_expr *expr)
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{
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const struct nft_immediate_expr *priv = nft_expr_priv(expr);
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return nft_data_uninit(&priv->data, nft_dreg_to_type(priv->dreg));
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}
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static int nft_immediate_dump(struct sk_buff *skb, const struct nft_expr *expr)
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{
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const struct nft_immediate_expr *priv = nft_expr_priv(expr);
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if (nla_put_be32(skb, NFTA_IMMEDIATE_DREG, htonl(priv->dreg)))
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goto nla_put_failure;
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return nft_data_dump(skb, NFTA_IMMEDIATE_DATA, &priv->data,
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nft_dreg_to_type(priv->dreg), priv->dlen);
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nla_put_failure:
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return -1;
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}
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static int nft_immediate_validate(const struct nft_ctx *ctx,
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const struct nft_expr *expr,
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const struct nft_data **data)
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{
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const struct nft_immediate_expr *priv = nft_expr_priv(expr);
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if (priv->dreg == NFT_REG_VERDICT)
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*data = &priv->data;
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return 0;
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}
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static struct nft_expr_type nft_imm_type;
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static const struct nft_expr_ops nft_imm_ops = {
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.type = &nft_imm_type,
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.size = NFT_EXPR_SIZE(sizeof(struct nft_immediate_expr)),
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.eval = nft_immediate_eval,
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.init = nft_immediate_init,
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.destroy = nft_immediate_destroy,
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.dump = nft_immediate_dump,
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.validate = nft_immediate_validate,
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};
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static struct nft_expr_type nft_imm_type __read_mostly = {
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.name = "immediate",
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.ops = &nft_imm_ops,
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.policy = nft_immediate_policy,
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.maxattr = NFTA_IMMEDIATE_MAX,
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.owner = THIS_MODULE,
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};
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int __init nft_immediate_module_init(void)
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{
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return nft_register_expr(&nft_imm_type);
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}
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void nft_immediate_module_exit(void)
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{
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nft_unregister_expr(&nft_imm_type);
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}
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