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authorTonghao Zhang <xiangxia.m.yue@gmail.com>2020-09-01 20:26:13 +0800
committerDavid S. Miller <davem@davemloft.net>2020-09-01 11:42:15 -0700
commitdf68d64ee3f54556aca1d50607e57b3129949a42 (patch)
tree5fc31764156c18d02197c675677cfbe1d680f5ea /net/openvswitch/flow_table.c
parentcf3266ad482d1bce2c49b6cd856a3f2d46f65023 (diff)
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 <pshelar@ovn.org> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/flow_table.c')
-rw-r--r--net/openvswitch/flow_table.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 441f68cf8a13..80849bdf45d2 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)