From: Pablo Neira Ayuso pablo@netfilter.org
[ 215a31f19dedd4e92a67cf5a9717ee898d012b3a ]
NFT_SET_EVAL is signalling the kernel that this sets can be updated from the evaluation path, even if there are no expressions attached to the element. Otherwise, set updates with no expressions fail. Update description to describe the right semantics.
Fixes: 22fe54d5fefc ("netfilter: nf_tables: add support for dynamic set updates") Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/uapi/linux/netfilter/nf_tables.h | 2 +- net/netfilter/nft_dynset.c | 4 +--- 2 files changed, 2 insertions(+), 4 deletions(-)
--- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -258,7 +258,7 @@ enum nft_rule_compat_attributes { * @NFT_SET_INTERVAL: set contains intervals * @NFT_SET_MAP: set is used as a dictionary * @NFT_SET_TIMEOUT: set uses timeouts - * @NFT_SET_EVAL: set contains expressions for evaluation + * @NFT_SET_EVAL: set can be updated from the evaluation path * @NFT_SET_OBJECT: set contains stateful objects */ enum nft_set_flags { --- a/net/netfilter/nft_dynset.c +++ b/net/netfilter/nft_dynset.c @@ -190,9 +190,7 @@ static int nft_dynset_init(const struct priv->expr = nft_expr_init(ctx, tb[NFTA_DYNSET_EXPR]); if (IS_ERR(priv->expr)) return PTR_ERR(priv->expr); - - } else if (set->flags & NFT_SET_EVAL) - return -EINVAL; + }
nft_set_ext_prepare(&priv->tmpl); nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_KEY, set->klen);