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netfilter: nf_tables: enable set expiration time for set elements

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Currently, the expiration of every element in a set or map
is a read-only parameter generated at kernel side.

This change will permit to set a certain expiration date
per element that will be required, for example, during
stateful replication among several nodes.

This patch handles the NFTA_SET_ELEM_EXPIRATION in order
to configure the expiration parameter per element, or
will use the timeout in the case that the expiration
is not set.

Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Laura Garcia Liebana
2019-06-18 11:11:02 +02:00
committed by Pablo Neira Ayuso
parent 2f0513d487
commit 79ebb5bb4e
3 changed files with 22 additions and 8 deletions
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2
include/net/netfilter/nf_tables.h
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@@ -636,7 +636,7 @@ static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext)
void *nft_set_elem_init(const struct nft_set *set,
const struct nft_set_ext_tmpl *tmpl,
const u32 *key, const u32 *data,
u64 timeout, gfp_t gfp);
u64 timeout, u64 expiration, gfp_t gfp);
void nft_set_elem_destroy(const struct nft_set *set, void *elem,
bool destroy_expr);