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netfilter: nft_meta_bridge: add NFT_META_BRI_IIFPVID support

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This patch allows you to match on the bridge port pvid, eg.

nft add rule bridge firewall zones counter meta ibrpvid 10

Signed-off-by: wenxu <wenxu@ucloud.cn>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
wenxu 2019-07-05 21:16:35 +08:00 committed by Pablo Neira Ayuso
parent 7582f5b70f
commit c54c7c6854
2 changed files with 17 additions and 0 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
View File

@ -795,6 +795,7 @@ enum nft_exthdr_attributes {
* @NFT_META_SECPATH: boolean, secpath_exists (!!skb->sp)
* @NFT_META_IIFKIND: packet input interface kind name (dev->rtnl_link_ops->kind)
* @NFT_META_OIFKIND: packet output interface kind name (dev->rtnl_link_ops->kind)
* @NFT_META_BRI_IIFPVID: packet input bridge port pvid
*/
enum nft_meta_keys {
NFT_META_LEN,
@ -825,6 +826,7 @@ enum nft_meta_keys {
NFT_META_SECPATH,
NFT_META_IIFKIND,
NFT_META_OIFKIND,
NFT_META_BRI_IIFPVID,
};
/**

15
net/bridge/netfilter/nft_meta_bridge.c
View File

@ -7,6 +7,7 @@
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nft_meta.h>
#include <linux/if_bridge.h>
static const struct net_device *
nft_meta_get_bridge(const struct net_device *dev)
@ -37,6 +38,17 @@ static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
if (!br_dev)
goto err;
break;
case NFT_META_BRI_IIFPVID: {
u16 p_pvid;
br_dev = nft_meta_get_bridge(in);
if (!br_dev || !br_vlan_enabled(br_dev))
goto err;
br_vlan_get_pvid_rcu(in, &p_pvid);
nft_reg_store16(dest, p_pvid);
return;
}
default:
goto out;
}
@ -62,6 +74,9 @@ static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
case NFT_META_BRI_OIFNAME:
len = IFNAMSIZ;
break;
case NFT_META_BRI_IIFPVID:
len = sizeof(u16);
break;
default:
return nft_meta_get_init(ctx, expr, tb);
}