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Date: Thu, 17 Apr 2014 14:15:38 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, nhorman@...driver.com, andy@...yhouse.net,
tgraf@...g.ch, dborkman@...hat.com, ogerlitz@...lanox.com,
jesse@...ira.com, pshelar@...ira.com, azhou@...ira.com,
ben@...adent.org.uk, stephen@...workplumber.org,
jeffrey.t.kirsher@...el.com, vyasevic@...hat.com,
xiyou.wangcong@...il.com, john.r.fastabend@...el.com,
edumazet@...gle.com, jhs@...atatu.com, sfeldma@...ulusnetworks.com,
f.fainelli@...il.com, roopa@...ulusnetworks.com,
linville@...driver.com, dev@...nvswitch.org, jasowang@...hat.com,
ebiederm@...ssion.com, nicolas.dichtel@...nd.com,
ryazanov.s.a@...il.com, buytenh@...tstofly.org,
aviadr@...lanox.com, nbd@...nwrt.org, alexei.starovoitov@...il.com,
Neil.Jerram@...aswitch.com
Subject: [patch net-next RFC v3 10/10] openvswitch: add support for datapath hardware offload
Benefit from the possibility to work with flows in switch devices and
use the swdev api to offload flow datapath.
Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
include/linux/sw_flow.h | 16 +++-
net/openvswitch/Makefile | 3 +-
net/openvswitch/datapath.c | 16 +++-
net/openvswitch/hw_offload.c | 170 +++++++++++++++++++++++++++++++++++++++++++
net/openvswitch/hw_offload.h | 31 ++++++++
5 files changed, 231 insertions(+), 5 deletions(-)
create mode 100644 net/openvswitch/hw_offload.c
create mode 100644 net/openvswitch/hw_offload.h
diff --git a/include/linux/sw_flow.h b/include/linux/sw_flow.h
index 3bbd5aa..12a24f9 100644
--- a/include/linux/sw_flow.h
+++ b/include/linux/sw_flow.h
@@ -102,7 +102,21 @@ struct sw_flow {
struct sw_flow_mask *mask;
};
+enum sw_flow_action_type {
+ SW_FLOW_ACTION_TYPE_OUTPUT,
+ SW_FLOW_ACTION_TYPE_VLAN_PUSH,
+ SW_FLOW_ACTION_TYPE_VLAN_POP,
+};
+
struct sw_flow_action {
-}
+ enum sw_flow_action_type type;
+ union {
+ struct net_device *output_dev;
+ struct {
+ __be16 vlan_proto;
+ u16 vlan_tci;
+ } vlan;
+ };
+};
#endif /* _LINUX_SW_FLOW_H_ */
diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile
index 3591cb5..5152437 100644
--- a/net/openvswitch/Makefile
+++ b/net/openvswitch/Makefile
@@ -13,7 +13,8 @@ openvswitch-y := \
flow_table.o \
vport.o \
vport-internal_dev.o \
- vport-netdev.o
+ vport-netdev.o \
+ hw_offload.o
ifneq ($(CONFIG_OPENVSWITCH_VXLAN),)
openvswitch-y += vport-vxlan.o
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 10ffb0a..f1e0792 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -59,6 +59,7 @@
#include "flow_netlink.h"
#include "vport-internal_dev.h"
#include "vport-netdev.h"
+#include "hw_offload.h"
int ovs_net_id __read_mostly;
@@ -840,13 +841,15 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
flow->flow.key = masked_key;
flow->flow.unmasked_key = key;
rcu_assign_pointer(flow->sf_acts, acts);
+ acts = NULL;
/* Put flow in bucket. */
error = ovs_flow_tbl_insert(&dp->table, flow, &mask);
- if (error) {
- acts = NULL;
+ if (error)
goto err_flow_free;
- }
+ error = ovs_hw_flow_insert(dp, flow, flow->sf_acts);
+ if (error)
+ goto err_flow_tbl_remove;
reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
} else {
@@ -868,6 +871,10 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
if (!ovs_flow_cmp_unmasked_key(flow, &match))
goto err_unlock_ovs;
+ error = ovs_hw_flow_actions_update(dp, flow, acts);
+ if (error)
+ goto err_unlock_ovs;
+
/* Update actions. */
old_acts = ovsl_dereference(flow->sf_acts);
rcu_assign_pointer(flow->sf_acts, acts);
@@ -888,6 +895,8 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
0, PTR_ERR(reply));
return 0;
+err_flow_tbl_remove:
+ ovs_flow_tbl_remove(&dp->table, flow);
err_flow_free:
ovs_flow_free(flow, false);
err_unlock_ovs:
@@ -985,6 +994,7 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
goto unlock;
}
+ ovs_hw_flow_remove(dp, flow);
ovs_flow_tbl_remove(&dp->table, flow);
err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
diff --git a/net/openvswitch/hw_offload.c b/net/openvswitch/hw_offload.c
new file mode 100644
index 0000000..c4c64d0
--- /dev/null
+++ b/net/openvswitch/hw_offload.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2014 Jiri Pirko <jiri@...nulli.us>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/rcupdate.h>
+#include <linux/netdevice.h>
+#include <linux/sw_flow.h>
+#include <linux/switchdev.h>
+
+#include "datapath.h"
+#include "vport-netdev.h"
+
+static struct net_device *__dp_master(struct datapath *dp)
+{
+ struct vport *local;
+
+ local = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
+ BUG_ON(!local);
+ return local->ops->get_netdev(local);
+}
+
+static int sw_flow_action_create(struct datapath *dp,
+ struct sw_flow_action **p_action,
+ size_t *p_action_count,
+ struct sw_flow_actions *acts)
+{
+ const struct nlattr *attr = acts->actions;
+ int len = acts->actions_len;
+ const struct nlattr *a;
+ int rem;
+ struct sw_flow_action *action, *cur;
+ size_t action_count = 0;
+ int err;
+
+ for (a = attr, rem = len; rem > 0; a = nla_next(a, &rem))
+ action_count++;
+
+ action = kzalloc(sizeof(*action) * action_count, GFP_KERNEL);
+ if (!action)
+ return -ENOMEM;
+
+ cur = action;
+ for (a = attr, rem = len; rem > 0; a = nla_next(a, &rem)) {
+ switch (nla_type(a)) {
+ case OVS_ACTION_ATTR_OUTPUT:
+ {
+ struct vport *vport;
+
+ vport = ovs_vport_ovsl_rcu(dp, nla_get_u32(a));
+ if (vport->ops->type != OVS_VPORT_TYPE_NETDEV) {
+ err = -EOPNOTSUPP;
+ goto errout;
+ }
+ cur->type = SW_FLOW_ACTION_TYPE_OUTPUT;
+ cur->output_dev = vport->ops->get_netdev(vport);
+ }
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_VLAN:
+ {
+ const struct ovs_action_push_vlan *vlan;
+
+ vlan = nla_data(a);
+ cur->type = SW_FLOW_ACTION_TYPE_VLAN_PUSH;
+ cur->vlan.vlan_proto = vlan->vlan_tpid;
+ cur->vlan.vlan_tci = vlan->vlan_tci;
+ }
+ break;
+
+ case OVS_ACTION_ATTR_POP_VLAN:
+ cur->type = SW_FLOW_ACTION_TYPE_VLAN_POP;
+ break;
+
+ default:
+ err = -EOPNOTSUPP;
+ goto errout;
+ }
+ action++;
+ }
+ *p_action = action;
+ *p_action_count = action_count;
+ return 0;
+
+errout:
+ kfree(action);
+ return err;
+}
+
+int ovs_hw_flow_insert(struct datapath *dp, struct ovs_flow *flow,
+ struct sw_flow_actions *acts)
+{
+ struct list_head *iter;
+ struct net_device *dev;
+ struct sw_flow_action *action;
+ size_t action_count;
+ int err;
+
+ err = sw_flow_action_create(dp, &action, &action_count, acts);
+ if (err)
+ return err;
+
+ rcu_read_lock();
+ netdev_for_each_all_lower_dev_rcu(__dp_master(dp), dev, iter) {
+ err = swdev_flow_insert(dev, &flow->flow);
+ if (err && err != -EOPNOTSUPP)
+ break;
+ err = swdev_flow_action_set(dev, &flow->flow,
+ action, action_count);
+ if (err && err != -EOPNOTSUPP)
+ break;
+ }
+ rcu_read_unlock();
+
+ kfree(action);
+
+ return err;
+}
+
+void ovs_hw_flow_remove(struct datapath *dp, struct ovs_flow *flow)
+{
+ struct list_head *iter;
+ struct net_device *dev;
+
+ rcu_read_lock();
+ netdev_for_each_all_lower_dev_rcu(__dp_master(dp), dev, iter)
+ swdev_flow_remove(dev, &flow->flow);
+ rcu_read_unlock();
+}
+
+int ovs_hw_flow_actions_update(struct datapath *dp, struct ovs_flow *flow,
+ struct sw_flow_actions *acts)
+{
+ struct list_head *iter;
+ struct net_device *dev;
+ struct sw_flow_action *action;
+ size_t action_count;
+ int err;
+
+ err = sw_flow_action_create(dp, &action, &action_count, acts);
+ if (err)
+ return err;
+
+ rcu_read_lock();
+ netdev_for_each_all_lower_dev_rcu(__dp_master(dp), dev, iter) {
+ err = swdev_flow_action_set(dev, &flow->flow,
+ action, action_count);
+ if (err && err != -EOPNOTSUPP)
+ break;
+ }
+ rcu_read_unlock();
+
+ kfree(action);
+
+ return err;
+}
diff --git a/net/openvswitch/hw_offload.h b/net/openvswitch/hw_offload.h
new file mode 100644
index 0000000..7ecb60f
--- /dev/null
+++ b/net/openvswitch/hw_offload.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2014 Jiri Pirko <jiri@...nulli.us>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef HW_OFFLOAD_H
+#define HW_OFFLOAD_H 1
+
+#include "datapath.h"
+#include "flow.h"
+
+int ovs_hw_flow_insert(struct datapath *dp, struct ovs_flow *flow,
+ struct sw_flow_actions *acts);
+void ovs_hw_flow_remove(struct datapath *dp, struct ovs_flow *flow);
+int ovs_hw_flow_actions_update(struct datapath *dp, struct ovs_flow *flow,
+ struct sw_flow_actions *acts);
+
+#endif
--
1.9.0
--
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