dlm: switch to use rhashtable for rsbs

Replace our own hash table with the more advanced rhashtable
for keeping rsb structs.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index e55e0a2cd2e8..517fa975dc5a 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -63,6 +63,14 @@ static void release_node(struct config_item *);
 static struct configfs_attribute *comm_attrs[];
 static struct configfs_attribute *node_attrs[];
 
+const struct rhashtable_params dlm_rhash_rsb_params = {
+	.nelem_hint = 3, /* start small */
+	.key_len = DLM_RESNAME_MAXLEN,
+	.key_offset = offsetof(struct dlm_rsb, res_name),
+	.head_offset = offsetof(struct dlm_rsb, res_node),
+	.automatic_shrinking = true,
+};
+
 struct dlm_cluster {
 	struct config_group group;
 	unsigned int cl_tcp_port;