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netfilter: nf_tables: Expose the table usage counter via netlink

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Userspace can therefore know whether a table is in use or not, and
by how many chains. Suggested by Pablo Neira Ayuso.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Tomasz Bursztyka 2013-12-12 15:00:42 +02:00 • committed by Pablo Neira Ayuso
commit d8bcc768c8
2 changed files with 4 additions and 1 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@ -110,11 +110,13 @@ enum nft_table_flags {
*
* @NFTA_TABLE_NAME: name of the table (NLA_STRING)
* @NFTA_TABLE_FLAGS: bitmask of enum nft_table_flags (NLA_U32)
* @NFTA_TABLE_USE: number of chains in this table (NLA_U32)
*/
enum nft_table_attributes {
NFTA_TABLE_UNSPEC,
NFTA_TABLE_NAME,
NFTA_TABLE_FLAGS,
NFTA_TABLE_USE,
__NFTA_TABLE_MAX
};
#define NFTA_TABLE_MAX (__NFTA_TABLE_MAX - 1)