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netfilter: nf_tables: add NFTA_CHAIN_ID attribute

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This netlink attribute allows you to refer to chains inside a
transaction as an alternative to the name and the handle. The chain
binding support requires this new chain ID approach.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso
2020-06-30 19:21:11 +02:00
parent f0a5e4d7a5
commit 74cccc3d38
3 changed files with 17 additions and 3 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@@ -196,6 +196,7 @@ enum nft_table_attributes {
* @NFTA_CHAIN_TYPE: type name of the string (NLA_NUL_STRING)
* @NFTA_CHAIN_COUNTERS: counter specification of the chain (NLA_NESTED: nft_counter_attributes)
* @NFTA_CHAIN_FLAGS: chain flags
* @NFTA_CHAIN_ID: uniquely identifies a chain in a transaction (NLA_U32)
*/
enum nft_chain_attributes {
NFTA_CHAIN_UNSPEC,
@@ -209,6 +210,7 @@ enum nft_chain_attributes {
NFTA_CHAIN_COUNTERS,
NFTA_CHAIN_PAD,
NFTA_CHAIN_FLAGS,
NFTA_CHAIN_ID,
__NFTA_CHAIN_MAX
};
#define NFTA_CHAIN_MAX (__NFTA_CHAIN_MAX - 1)