netfilter: nf_tables: Drop dead code from fill_*_info routines

[ Upstream commit 8080357a8c6cf4905bbd8969412c19d34be3395e ]

This practically reverts commit 28339b21a365 ("netfilter: nf_tables: do
not send complete notification of deletions"): The feature was never
effective, due to prior modification of 'event' variable the conditional
early return never happened.

User space also relies upon the current behaviour, so better reintroduce
the shortened deletion notifications once it is fixed.

Fixes: 28339b21a365 ("netfilter: nf_tables: do not send complete notification of deletions")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index bdee187bc5dd456a0e55170284f6322e051b4e40..8077bf0378bb5a53ee9e5d3199286c469e17b036 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1029,11 +1029,6 @@ static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
                         NFTA_TABLE_PAD))
                goto nla_put_failure;
 
-       if (event == NFT_MSG_DELTABLE) {
-               nlmsg_end(skb, nlh);
-               return 0;
-       }
-
        if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
                         htonl(table->flags & NFT_TABLE_F_MASK)))
                goto nla_put_failure;
@@ -1889,11 +1884,6 @@ static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
                         NFTA_CHAIN_PAD))
                goto nla_put_failure;
 
-       if (event == NFT_MSG_DELCHAIN && !hook_list) {
-               nlmsg_end(skb, nlh);
-               return 0;
-       }
-
        if (nft_is_base_chain(chain)) {
                const struct nft_base_chain *basechain = nft_base_chain(chain);
                struct nft_stats __percpu *stats;
@@ -4678,11 +4668,6 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
                         NFTA_SET_PAD))
                goto nla_put_failure;
 
-       if (event == NFT_MSG_DELSET) {
-               nlmsg_end(skb, nlh);
-               return 0;
-       }
-
        if (set->flags != 0)
                if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
                        goto nla_put_failure;
@@ -8017,11 +8002,6 @@ static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
                         NFTA_OBJ_PAD))
                goto nla_put_failure;
 
-       if (event == NFT_MSG_DELOBJ) {
-               nlmsg_end(skb, nlh);
-               return 0;
-       }
-
        if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
            nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
            nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
@@ -9040,11 +9020,6 @@ static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
                         NFTA_FLOWTABLE_PAD))
                goto nla_put_failure;
 
-       if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
-               nlmsg_end(skb, nlh);
-               return 0;
-       }
-
        if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
            nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
                goto nla_put_failure;