src: add support to flush sets

You can use this new command to remove all existing elements in a set:

 # nft flush set filter xyz

After this command, the set 'xyz' in table 'filter' becomes empty.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/netlink.h b/include/netlink.h
index 28c11f60..363b5251 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -165,6 +165,8 @@ extern int netlink_delete_setelems(struct netlink_ctx *ctx, const struct handle
 				   const struct expr *expr);
 extern int netlink_get_setelems(struct netlink_ctx *ctx, const struct handle *h,
 				const struct location *loc, struct set *set);
+extern int netlink_flush_setelems(struct netlink_ctx *ctx, const struct handle *h,
+				  const struct location *loc);
 
 extern void netlink_dump_table(const struct nftnl_table *nlt);
 extern void netlink_dump_chain(const struct nftnl_chain *nlc);