netfilter: nf_tables: prepare for expressions associated to set elements
Preparation to attach expressions to set elements: add a set extension
type to hold an expression and dump the expression information with the
set element.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index e97bee5..8830811 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2904,6 +2904,9 @@
[NFT_SET_EXT_DATA] = {
.align = __alignof__(u32),
},
+ [NFT_SET_EXT_EXPR] = {
+ .align = __alignof__(struct nft_expr),
+ },
[NFT_SET_EXT_FLAGS] = {
.len = sizeof(u8),
.align = __alignof__(u8),
@@ -2990,6 +2993,10 @@
set->dlen) < 0)
goto nla_put_failure;
+ if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR) &&
+ nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, nft_set_ext_expr(ext)) < 0)
+ goto nla_put_failure;
+
if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
htonl(*nft_set_ext_flags(ext))))
@@ -3276,6 +3283,8 @@
nft_data_uninit(nft_set_ext_key(ext), NFT_DATA_VALUE);
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
nft_data_uninit(nft_set_ext_data(ext), set->dtype);
+ if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
+ nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext));
kfree(elem);
}