This patch implements the check generation id as provided by nfnetlink.
This allows us to reject ruleset updates against stale baseline, so
userspace can retry update with a fresh ruleset cache.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
net/netfilter/nf_tables_api.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index cb6ae46f6c48..71c60a04b66b 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4972,6 +4972,11 @@ static int nf_tables_abort(struct net *net, struct sk_buff *skb)
return 0;
}
+static bool nf_tables_valid_genid(struct net *net, u32 genid)
+{
+ return net->nft.base_seq == genid;
+}
+
static const struct nfnetlink_subsystem nf_tables_subsys = {
.name = "nf_tables",
.subsys_id = NFNL_SUBSYS_NFTABLES,
@@ -4979,6 +4984,7 @@ static const struct nfnetlink_subsystem nf_tables_subsys = {
.cb = nf_tables_cb,
.commit = nf_tables_commit,
.abort = nf_tables_abort,
+ .valid_genid = nf_tables_valid_genid,
};
int nft_chain_validate_dependency(const struct nft_chain *chain,
--
2.1.4
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