You must define a max_shift parameter to rhashtable or else the table cannot
grow. This sets max_shift for nft_hash to 24, which will allow the table to
grow to 2^24 or 16 million buckets.
Acked-by: Thomas Graf <tgraf@xxxxxxx>
Signed-off-by: Josh Hunt <johunt@xxxxxxxxxx>
---
net/netfilter/nft_hash.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/netfilter/nft_hash.c b/net/netfilter/nft_hash.c
index 61e6c40..a32df35 100644
--- a/net/netfilter/nft_hash.c
+++ b/net/netfilter/nft_hash.c
@@ -23,6 +23,9 @@
/* We target a hash table size of 4, element hint is 75% of final size */
#define NFT_HASH_ELEMENT_HINT 3
+/* Set default of 2^24 buckets or 16 million entries */
+#define NFT_HASH_MAX_BUCKETS 24
+
struct nft_hash_elem {
struct rhash_head node;
struct nft_data key;
@@ -192,6 +195,7 @@ static int nft_hash_init(const struct nft_set *set,
.key_offset = offsetof(struct nft_hash_elem, key),
.key_len = set->klen,
.hashfn = jhash,
+ .max_shift = NFT_HASH_MAX_BUCKETS,
.grow_decision = rht_grow_above_75,
.shrink_decision = rht_shrink_below_30,
};
--
1.7.9.5
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