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netfilter: nf_tables: add userdata support for nft_object

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Enables storing userdata for nft_object. Initially this will store an
optional comment but can be extended in the future as needed.

Adds new attribute NFTA_OBJ_USERDATA to nft_object.

Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jose M. Guisado Gomez
2020-09-08 13:01:41 +02:00
committed by Pablo Neira Ayuso
parent 0c5edd77a2
commit b131c96496
3 changed files with 31 additions and 8 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@@ -1559,6 +1559,7 @@ enum nft_ct_expectation_attributes {
* @NFTA_OBJ_DATA: stateful object data (NLA_NESTED)
* @NFTA_OBJ_USE: number of references to this expression (NLA_U32)
* @NFTA_OBJ_HANDLE: object handle (NLA_U64)
* @NFTA_OBJ_USERDATA: user data (NLA_BINARY)
*/
enum nft_object_attributes {
NFTA_OBJ_UNSPEC,
@@ -1569,6 +1570,7 @@ enum nft_object_attributes {
NFTA_OBJ_USE,
NFTA_OBJ_HANDLE,
NFTA_OBJ_PAD,
NFTA_OBJ_USERDATA,
__NFTA_OBJ_MAX
};
#define NFTA_OBJ_MAX (__NFTA_OBJ_MAX - 1)