author: Herbert Xu <herbert@gondor.apana.org.au> 2015-05-15 11:30:47 +0800
committer: David S. Miller <davem@davemloft.net> 2015-05-16 18:08:26 -0400
commit: 07ee0722bf941960fb3888f9c9b5839473372fd1
parent: db9683fb412d4af33f66b9fe3d8dace1c6d113c9
Commit Summary:
Diffstat:
1 file changed, 11 insertions, 0 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index b28df4019ade..4396434e4715 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -14,6 +14,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/log2.h>
@@ -446,6 +447,10 @@ int rhashtable_insert_slow(struct rhashtable *ht, const void *key,
if (key && rhashtable_lookup_fast(ht, key, ht->p))
goto exit;
+ err = -E2BIG;
+ if (unlikely(rht_grow_above_max(ht, tbl)))
+ goto exit;
+
err = -EAGAIN;
if (rhashtable_check_elasticity(ht, tbl, hash) ||
rht_grow_above_100(ht, tbl))
@@ -738,6 +743,12 @@ int rhashtable_init(struct rhashtable *ht,
if (params->max_size)
ht->p.max_size = rounddown_pow_of_two(params->max_size);
+ if (params->insecure_max_entries)
+ ht->p.insecure_max_entries =
+ rounddown_pow_of_two(params->insecure_max_entries);
+ else
+ ht->p.insecure_max_entries = ht->p.max_size * 2;
+
ht->p.min_size = max(ht->p.min_size, HASH_MIN_SIZE);
/* The maximum (not average) chain length grows with the