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| author | Tonghao Zhang <xiangxia.m.yue@gmail.com> | 2020-09-01 20:26:13 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-01 11:42:15 -0700 |
| commit | df68d64ee3f54556aca1d50607e57b3129949a42 (patch) | |
| tree | 5fc31764156c18d02197c675677cfbe1d680f5ea /net | |
| parent | cf3266ad482d1bce2c49b6cd856a3f2d46f65023 (diff) | |
| download | linux-df68d64ee3f54556aca1d50607e57b3129949a42.tar.gz linux-df68d64ee3f54556aca1d50607e57b3129949a42.tar.bz2 linux-df68d64ee3f54556aca1d50607e57b3129949a42.zip | |
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')
| -rw-r--r-- | net/openvswitch/flow_table.c | 22 |
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) |