netfilter: nf_tables: honor set timeout and garbage collection updates

Set timeout and garbage collection interval updates are ignored on
updates. Add transaction to update global set element timeout and
garbage collection interval.

Fixes: 96518518cc41 ("netfilter: add nftables")
Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 4957b4775757..9430128aae99 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -597,7 +597,9 @@ void *nft_set_catchall_gc(const struct nft_set *set);
 
 static inline unsigned long nft_set_gc_interval(const struct nft_set *set)
 {
-	return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ;
+	u32 gc_int = READ_ONCE(set->gc_int);
+
+	return gc_int ? msecs_to_jiffies(gc_int) : HZ;
 }
 
 /**
@@ -1570,6 +1572,9 @@ struct nft_trans_rule {
 struct nft_trans_set {
 	struct nft_set			*set;
 	u32				set_id;
+	u32				gc_int;
+	u64				timeout;
+	bool				update;
 	bool				bound;
 };
 
@@ -1579,6 +1584,12 @@ struct nft_trans_set {
 	(((struct nft_trans_set *)trans->data)->set_id)
 #define nft_trans_set_bound(trans)	\
 	(((struct nft_trans_set *)trans->data)->bound)
+#define nft_trans_set_update(trans)	\
+	(((struct nft_trans_set *)trans->data)->update)
+#define nft_trans_set_timeout(trans)	\
+	(((struct nft_trans_set *)trans->data)->timeout)
+#define nft_trans_set_gc_int(trans)	\
+	(((struct nft_trans_set *)trans->data)->gc_int)
 
 struct nft_trans_chain {
 	bool				update;