mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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netfilter: merge meta_bridge into nft_meta
It overcomplicates things for no reason. nft_meta_bridge only offers retrieval of bridge port interface name. Because of this being its own module, we had to export all nft_meta functions, which we can then make static again (which even reduces the size of nft_meta -- including bridge port retrieval...): before: text data bss dec hex filename 1838 832 0 2670 a6e net/bridge/netfilter/nft_meta_bridge.ko 6147 936 1 7084 1bac net/netfilter/nft_meta.ko after: 5826 936 1 6763 1a6b net/netfilter/nft_meta.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
parent
99a0efbeeb
commit
bd2bbdb497
5 changed files with 58 additions and 219 deletions
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@ -1,44 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NFT_META_H_
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#define _NFT_META_H_
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struct nft_meta {
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enum nft_meta_keys key:8;
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union {
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enum nft_registers dreg:8;
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enum nft_registers sreg:8;
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};
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};
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extern const struct nla_policy nft_meta_policy[];
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int nft_meta_get_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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int nft_meta_set_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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int nft_meta_get_dump(struct sk_buff *skb,
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const struct nft_expr *expr);
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int nft_meta_set_dump(struct sk_buff *skb,
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const struct nft_expr *expr);
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void nft_meta_get_eval(const struct nft_expr *expr,
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struct nft_regs *regs,
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const struct nft_pktinfo *pkt);
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void nft_meta_set_eval(const struct nft_expr *expr,
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struct nft_regs *regs,
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const struct nft_pktinfo *pkt);
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void nft_meta_set_destroy(const struct nft_ctx *ctx,
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const struct nft_expr *expr);
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int nft_meta_set_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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#endif
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@ -8,13 +8,6 @@ menuconfig NF_TABLES_BRIDGE
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bool "Ethernet Bridge nf_tables support"
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bool "Ethernet Bridge nf_tables support"
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if NF_TABLES_BRIDGE
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if NF_TABLES_BRIDGE
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config NFT_BRIDGE_META
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tristate "Netfilter nf_table bridge meta support"
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depends on NFT_META
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help
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Add support for bridge dedicated meta key.
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config NFT_BRIDGE_REJECT
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config NFT_BRIDGE_REJECT
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tristate "Netfilter nf_tables bridge reject support"
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tristate "Netfilter nf_tables bridge reject support"
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depends on NFT_REJECT && NFT_REJECT_IPV4 && NFT_REJECT_IPV6
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depends on NFT_REJECT && NFT_REJECT_IPV4 && NFT_REJECT_IPV6
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@ -3,7 +3,6 @@
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# Makefile for the netfilter modules for Link Layer filtering on a bridge.
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# Makefile for the netfilter modules for Link Layer filtering on a bridge.
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#
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#
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obj-$(CONFIG_NFT_BRIDGE_META) += nft_meta_bridge.o
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obj-$(CONFIG_NFT_BRIDGE_REJECT) += nft_reject_bridge.o
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obj-$(CONFIG_NFT_BRIDGE_REJECT) += nft_reject_bridge.o
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# packet logging
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# packet logging
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@ -1,135 +0,0 @@
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/*
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* Copyright (c) 2014 Intel Corporation
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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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*/
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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.h>
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#include <net/netfilter/nft_meta.h>
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#include "../br_private.h"
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static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
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struct nft_regs *regs,
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const struct nft_pktinfo *pkt)
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{
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const struct nft_meta *priv = nft_expr_priv(expr);
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const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
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u32 *dest = ®s->data[priv->dreg];
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const struct net_bridge_port *p;
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switch (priv->key) {
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case NFT_META_BRI_IIFNAME:
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if (in == NULL || (p = br_port_get_rcu(in)) == NULL)
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goto err;
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break;
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case NFT_META_BRI_OIFNAME:
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if (out == NULL || (p = br_port_get_rcu(out)) == NULL)
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goto err;
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break;
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default:
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goto out;
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}
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strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
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return;
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out:
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return nft_meta_get_eval(expr, regs, pkt);
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err:
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regs->verdict.code = NFT_BREAK;
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}
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static int nft_meta_bridge_get_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_meta *priv = nft_expr_priv(expr);
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unsigned int len;
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priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
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switch (priv->key) {
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case NFT_META_BRI_IIFNAME:
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case NFT_META_BRI_OIFNAME:
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len = IFNAMSIZ;
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break;
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default:
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return nft_meta_get_init(ctx, expr, tb);
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}
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priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
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return nft_validate_register_store(ctx, priv->dreg, NULL,
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NFT_DATA_VALUE, len);
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}
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static struct nft_expr_type nft_meta_bridge_type;
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static const struct nft_expr_ops nft_meta_bridge_get_ops = {
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.type = &nft_meta_bridge_type,
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.size = NFT_EXPR_SIZE(sizeof(struct nft_meta)),
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.eval = nft_meta_bridge_get_eval,
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.init = nft_meta_bridge_get_init,
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.dump = nft_meta_get_dump,
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};
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static const struct nft_expr_ops nft_meta_bridge_set_ops = {
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.type = &nft_meta_bridge_type,
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.size = NFT_EXPR_SIZE(sizeof(struct nft_meta)),
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.eval = nft_meta_set_eval,
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.init = nft_meta_set_init,
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.destroy = nft_meta_set_destroy,
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.dump = nft_meta_set_dump,
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.validate = nft_meta_set_validate,
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};
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static const struct nft_expr_ops *
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nft_meta_bridge_select_ops(const struct nft_ctx *ctx,
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const struct nlattr * const tb[])
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{
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if (tb[NFTA_META_KEY] == NULL)
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return ERR_PTR(-EINVAL);
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if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG])
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return ERR_PTR(-EINVAL);
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if (tb[NFTA_META_DREG])
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return &nft_meta_bridge_get_ops;
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if (tb[NFTA_META_SREG])
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return &nft_meta_bridge_set_ops;
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return ERR_PTR(-EINVAL);
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}
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static struct nft_expr_type nft_meta_bridge_type __read_mostly = {
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.family = NFPROTO_BRIDGE,
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.name = "meta",
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.select_ops = nft_meta_bridge_select_ops,
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.policy = nft_meta_policy,
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.maxattr = NFTA_META_MAX,
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.owner = THIS_MODULE,
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};
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static int __init nft_meta_bridge_module_init(void)
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{
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return nft_register_expr(&nft_meta_bridge_type);
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}
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static void __exit nft_meta_bridge_module_exit(void)
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{
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nft_unregister_expr(&nft_meta_bridge_type);
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}
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module_init(nft_meta_bridge_module_init);
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module_exit(nft_meta_bridge_module_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
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MODULE_ALIAS_NFT_AF_EXPR(AF_BRIDGE, "meta");
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@ -1,5 +1,7 @@
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/*
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/*
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* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
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* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
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* Copyright (c) 2014 Intel Corporation
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* Author: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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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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* it under the terms of the GNU General Public License version 2 as
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#include <net/tcp_states.h> /* for TCP_TIME_WAIT */
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#include <net/tcp_states.h> /* for TCP_TIME_WAIT */
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#include <net/netfilter/nf_tables.h>
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#include <net/netfilter/nf_tables.h>
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#include <net/netfilter/nf_tables_core.h>
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#include <net/netfilter/nf_tables_core.h>
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#include <net/netfilter/nft_meta.h>
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#include <uapi/linux/netfilter_bridge.h> /* NF_BR_PRE_ROUTING */
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#include <uapi/linux/netfilter_bridge.h> /* NF_BR_PRE_ROUTING */
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struct nft_meta {
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enum nft_meta_keys key:8;
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union {
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enum nft_registers dreg:8;
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enum nft_registers sreg:8;
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};
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};
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static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state);
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static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state);
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void nft_meta_get_eval(const struct nft_expr *expr,
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#ifdef CONFIG_NF_TABLES_BRIDGE
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struct nft_regs *regs,
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#include "../bridge/br_private.h"
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const struct nft_pktinfo *pkt)
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#endif
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static void nft_meta_get_eval(const struct nft_expr *expr,
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struct nft_regs *regs,
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const struct nft_pktinfo *pkt)
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{
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{
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const struct nft_meta *priv = nft_expr_priv(expr);
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const struct nft_meta *priv = nft_expr_priv(expr);
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const struct sk_buff *skb = pkt->skb;
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const struct sk_buff *skb = pkt->skb;
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const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
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const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
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struct sock *sk;
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struct sock *sk;
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u32 *dest = ®s->data[priv->dreg];
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u32 *dest = ®s->data[priv->dreg];
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#ifdef CONFIG_NF_TABLES_BRIDGE
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const struct net_bridge_port *p;
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#endif
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switch (priv->key) {
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switch (priv->key) {
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case NFT_META_LEN:
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case NFT_META_LEN:
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@ -214,6 +230,18 @@ void nft_meta_get_eval(const struct nft_expr *expr,
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case NFT_META_SECPATH:
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case NFT_META_SECPATH:
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nft_reg_store8(dest, !!skb->sp);
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nft_reg_store8(dest, !!skb->sp);
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break;
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break;
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#endif
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#ifdef CONFIG_NF_TABLES_BRIDGE
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case NFT_META_BRI_IIFNAME:
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if (in == NULL || (p = br_port_get_rcu(in)) == NULL)
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goto err;
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strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
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return;
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case NFT_META_BRI_OIFNAME:
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if (out == NULL || (p = br_port_get_rcu(out)) == NULL)
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goto err;
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strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
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return;
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#endif
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#endif
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default:
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default:
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WARN_ON(1);
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WARN_ON(1);
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@ -224,11 +252,10 @@ void nft_meta_get_eval(const struct nft_expr *expr,
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err:
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err:
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regs->verdict.code = NFT_BREAK;
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regs->verdict.code = NFT_BREAK;
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}
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}
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EXPORT_SYMBOL_GPL(nft_meta_get_eval);
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void nft_meta_set_eval(const struct nft_expr *expr,
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static void nft_meta_set_eval(const struct nft_expr *expr,
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struct nft_regs *regs,
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struct nft_regs *regs,
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const struct nft_pktinfo *pkt)
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const struct nft_pktinfo *pkt)
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{
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{
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const struct nft_meta *meta = nft_expr_priv(expr);
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const struct nft_meta *meta = nft_expr_priv(expr);
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struct sk_buff *skb = pkt->skb;
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struct sk_buff *skb = pkt->skb;
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@ -258,18 +285,16 @@ void nft_meta_set_eval(const struct nft_expr *expr,
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WARN_ON(1);
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WARN_ON(1);
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}
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}
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}
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}
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EXPORT_SYMBOL_GPL(nft_meta_set_eval);
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const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = {
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static const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = {
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[NFTA_META_DREG] = { .type = NLA_U32 },
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[NFTA_META_DREG] = { .type = NLA_U32 },
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[NFTA_META_KEY] = { .type = NLA_U32 },
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[NFTA_META_KEY] = { .type = NLA_U32 },
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[NFTA_META_SREG] = { .type = NLA_U32 },
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[NFTA_META_SREG] = { .type = NLA_U32 },
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};
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};
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EXPORT_SYMBOL_GPL(nft_meta_policy);
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int nft_meta_get_init(const struct nft_ctx *ctx,
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static int nft_meta_get_init(const struct nft_ctx *ctx,
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const struct nft_expr *expr,
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const struct nft_expr *expr,
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const struct nlattr * const tb[])
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const struct nlattr * const tb[])
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{
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{
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struct nft_meta *priv = nft_expr_priv(expr);
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struct nft_meta *priv = nft_expr_priv(expr);
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unsigned int len;
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unsigned int len;
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@ -317,6 +342,14 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
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case NFT_META_SECPATH:
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case NFT_META_SECPATH:
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len = sizeof(u8);
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len = sizeof(u8);
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break;
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break;
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#endif
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#ifdef CONFIG_NF_TABLES_BRIDGE
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case NFT_META_BRI_IIFNAME:
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case NFT_META_BRI_OIFNAME:
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if (ctx->family != NFPROTO_BRIDGE)
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return -EOPNOTSUPP;
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len = IFNAMSIZ;
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break;
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#endif
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#endif
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default:
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default:
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return -EOPNOTSUPP;
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return -EOPNOTSUPP;
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@ -326,7 +359,6 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
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return nft_validate_register_store(ctx, priv->dreg, NULL,
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return nft_validate_register_store(ctx, priv->dreg, NULL,
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NFT_DATA_VALUE, len);
|
NFT_DATA_VALUE, len);
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_get_init);
|
|
||||||
|
|
||||||
static int nft_meta_get_validate(const struct nft_ctx *ctx,
|
static int nft_meta_get_validate(const struct nft_ctx *ctx,
|
||||||
const struct nft_expr *expr,
|
const struct nft_expr *expr,
|
||||||
|
@ -360,9 +392,9 @@ static int nft_meta_get_validate(const struct nft_ctx *ctx,
|
||||||
#endif
|
#endif
|
||||||
}
|
}
|
||||||
|
|
||||||
int nft_meta_set_validate(const struct nft_ctx *ctx,
|
static int nft_meta_set_validate(const struct nft_ctx *ctx,
|
||||||
const struct nft_expr *expr,
|
const struct nft_expr *expr,
|
||||||
const struct nft_data **data)
|
const struct nft_data **data)
|
||||||
{
|
{
|
||||||
struct nft_meta *priv = nft_expr_priv(expr);
|
struct nft_meta *priv = nft_expr_priv(expr);
|
||||||
unsigned int hooks;
|
unsigned int hooks;
|
||||||
|
@ -388,11 +420,10 @@ int nft_meta_set_validate(const struct nft_ctx *ctx,
|
||||||
|
|
||||||
return nft_chain_validate_hooks(ctx->chain, hooks);
|
return nft_chain_validate_hooks(ctx->chain, hooks);
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_set_validate);
|
|
||||||
|
|
||||||
int nft_meta_set_init(const struct nft_ctx *ctx,
|
static int nft_meta_set_init(const struct nft_ctx *ctx,
|
||||||
const struct nft_expr *expr,
|
const struct nft_expr *expr,
|
||||||
const struct nlattr * const tb[])
|
const struct nlattr * const tb[])
|
||||||
{
|
{
|
||||||
struct nft_meta *priv = nft_expr_priv(expr);
|
struct nft_meta *priv = nft_expr_priv(expr);
|
||||||
unsigned int len;
|
unsigned int len;
|
||||||
|
@ -424,10 +455,9 @@ int nft_meta_set_init(const struct nft_ctx *ctx,
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_set_init);
|
|
||||||
|
|
||||||
int nft_meta_get_dump(struct sk_buff *skb,
|
static int nft_meta_get_dump(struct sk_buff *skb,
|
||||||
const struct nft_expr *expr)
|
const struct nft_expr *expr)
|
||||||
{
|
{
|
||||||
const struct nft_meta *priv = nft_expr_priv(expr);
|
const struct nft_meta *priv = nft_expr_priv(expr);
|
||||||
|
|
||||||
|
@ -440,10 +470,8 @@ int nft_meta_get_dump(struct sk_buff *skb,
|
||||||
nla_put_failure:
|
nla_put_failure:
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_get_dump);
|
|
||||||
|
|
||||||
int nft_meta_set_dump(struct sk_buff *skb,
|
static int nft_meta_set_dump(struct sk_buff *skb, const struct nft_expr *expr)
|
||||||
const struct nft_expr *expr)
|
|
||||||
{
|
{
|
||||||
const struct nft_meta *priv = nft_expr_priv(expr);
|
const struct nft_meta *priv = nft_expr_priv(expr);
|
||||||
|
|
||||||
|
@ -457,17 +485,15 @@ int nft_meta_set_dump(struct sk_buff *skb,
|
||||||
nla_put_failure:
|
nla_put_failure:
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_set_dump);
|
|
||||||
|
|
||||||
void nft_meta_set_destroy(const struct nft_ctx *ctx,
|
static void nft_meta_set_destroy(const struct nft_ctx *ctx,
|
||||||
const struct nft_expr *expr)
|
const struct nft_expr *expr)
|
||||||
{
|
{
|
||||||
const struct nft_meta *priv = nft_expr_priv(expr);
|
const struct nft_meta *priv = nft_expr_priv(expr);
|
||||||
|
|
||||||
if (priv->key == NFT_META_NFTRACE)
|
if (priv->key == NFT_META_NFTRACE)
|
||||||
static_branch_dec(&nft_trace_enabled);
|
static_branch_dec(&nft_trace_enabled);
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(nft_meta_set_destroy);
|
|
||||||
|
|
||||||
static struct nft_expr_type nft_meta_type;
|
static struct nft_expr_type nft_meta_type;
|
||||||
static const struct nft_expr_ops nft_meta_get_ops = {
|
static const struct nft_expr_ops nft_meta_get_ops = {
|
||||||
|
|
Loading…
Reference in a new issue