diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2013-07-30 15:42:19 -0700 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2013-08-23 16:37:59 -0700 |
| commit | 59a35d60af3ab80037ad2fa2d60671ce2818b9e4 (patch) | |
| tree | f37b0c0b2a892d82f75e82dfb0b0fc5dc76511f1 /net/openvswitch | |
| parent | d57170b1b1d71382a0d9cf31b01364a97add3f19 (diff) | |
openvswitch: Use RCU lock for dp dump operation.
RCUfy dp-dump operation which is already read-only. This
makes all ovs dump operations lockless.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/datapath.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index e6fb866e4ed..9d97ef3c983 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -951,9 +951,10 @@ static struct genl_ops dp_packet_genl_ops[] = { static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) { + struct flow_table *table; int i; - struct flow_table *table = ovsl_dereference(dp->table); + table = rcu_dereference_check(dp->table, lockdep_ovsl_is_held()); stats->n_flows = ovs_flow_tbl_count(table); stats->n_hit = stats->n_missed = stats->n_lost = 0; @@ -1665,7 +1666,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) goto err_destroy_local_port; ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); - list_add_tail(&dp->list_node, &ovs_net->dps); + list_add_tail_rcu(&dp->list_node, &ovs_net->dps); ovs_unlock(); @@ -1703,7 +1704,7 @@ static void __dp_destroy(struct datapath *dp) ovs_dp_detach_port(vport); } - list_del(&dp->list_node); + list_del_rcu(&dp->list_node); /* OVSP_LOCAL is datapath internal port. We need to make sure that * all port in datapath are destroyed first before freeing datapath. @@ -1808,8 +1809,8 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) int skip = cb->args[0]; int i = 0; - ovs_lock(); - list_for_each_entry(dp, &ovs_net->dps, list_node) { + rcu_read_lock(); + list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { if (i >= skip && ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, @@ -1817,7 +1818,7 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) break; i++; } - ovs_unlock(); + rcu_read_unlock(); cb->args[0] = i; |