From: Tonghao Zhang Date: Tue, 1 Sep 2020 12:26:13 +0000 (+0800) Subject: net: openvswitch: refactor flow free function X-Git-Tag: v5.10.7~1401^2~398^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df68d64ee3f54556aca1d50607e57b3129949a42;p=platform%2Fkernel%2Flinux-rpi.git net: openvswitch: refactor flow free function Decrease table->count and ufid_count unconditionally, because we only don't use count or ufid_count to count when flushing the flows. To simplify the codes, we remove the "count" argument of table_instance_flow_free. To avoid a bug when deleting flows in the future, add WARN_ON in flush flows function. Cc: Pravin B Shelar Signed-off-by: Tonghao Zhang Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c index 441f68c..80849bd 100644 --- a/net/openvswitch/flow_table.c +++ b/net/openvswitch/flow_table.c @@ -461,18 +461,14 @@ static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) static void table_instance_flow_free(struct flow_table *table, struct table_instance *ti, struct table_instance *ufid_ti, - struct sw_flow *flow, - bool count) + struct sw_flow *flow) { hlist_del_rcu(&flow->flow_table.node[ti->node_ver]); - if (count) - table->count--; + table->count--; if (ovs_identifier_is_ufid(&flow->id)) { hlist_del_rcu(&flow->ufid_table.node[ufid_ti->node_ver]); - - if (count) - table->ufid_count--; + table->ufid_count--; } flow_mask_remove(table, flow->mask); @@ -497,10 +493,16 @@ void table_instance_flow_flush(struct flow_table *table, flow_table.node[ti->node_ver]) { table_instance_flow_free(table, ti, ufid_ti, - flow, false); + flow); ovs_flow_free(flow, true); } } + + if (WARN_ON(table->count != 0 || + table->ufid_count != 0)) { + table->count = 0; + table->ufid_count = 0; + } } static void table_instance_destroy(struct table_instance *ti, @@ -637,8 +639,6 @@ int ovs_flow_tbl_flush(struct flow_table *flow_table) rcu_assign_pointer(flow_table->ti, new_ti); rcu_assign_pointer(flow_table->ufid_ti, new_ufid_ti); flow_table->last_rehash = jiffies; - flow_table->count = 0; - flow_table->ufid_count = 0; table_instance_flow_flush(flow_table, old_ti, old_ufid_ti); table_instance_destroy(old_ti, old_ufid_ti); @@ -956,7 +956,7 @@ void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow) struct table_instance *ufid_ti = ovsl_dereference(table->ufid_ti); BUG_ON(table->count == 0); - table_instance_flow_free(table, ti, ufid_ti, flow, true); + table_instance_flow_free(table, ti, ufid_ti, flow); } static struct sw_flow_mask *mask_alloc(void)