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Message-Id: <1410478088-1465-1-git-send-email-pshelar@nicira.com>
Date: Thu, 11 Sep 2014 16:28:08 -0700
From: Pravin B Shelar <pshelar@...ira.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next v2 2/4] openvswitch: Use tun_key only for egress tunnel path.
Currently tun_key is used for passing tunnel information
on ingress and egress path, this cause confusion. Following
patch removes its use on ingress path make it egress only parameter.
Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
Acked-by: Andy Zhou <azhou@...ira.com>
---
net/openvswitch/actions.c | 3 +--
net/openvswitch/datapath.c | 19 ++++++-------------
net/openvswitch/datapath.h | 8 ++++----
net/openvswitch/flow.c | 7 ++++---
net/openvswitch/flow.h | 3 ++-
net/openvswitch/vport-gre.c | 22 ++++++++++++----------
net/openvswitch/vport-vxlan.c | 20 +++++++++++---------
net/openvswitch/vport.c | 12 ++++++++++--
8 files changed, 50 insertions(+), 44 deletions(-)
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 5231652..39c722f 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -511,7 +511,7 @@ static int execute_set_action(struct sk_buff *skb,
break;
case OVS_KEY_ATTR_IPV4_TUNNEL:
- OVS_CB(skb)->tun_key = nla_data(nested_attr);
+ OVS_CB(skb)->egress_tun_key = nla_data(nested_attr);
break;
case OVS_KEY_ATTR_ETHERNET:
@@ -612,6 +612,5 @@ int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb)
{
struct sw_flow_actions *acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts);
- OVS_CB(skb)->tun_key = NULL;
return do_execute_actions(dp, skb, acts->actions, acts->actions_len);
}
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 7c3939a..4046bc2 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -237,33 +237,26 @@ void ovs_dp_detach_port(struct vport *p)
}
/* Must be called with rcu_read_lock. */
-void ovs_dp_process_received_packet(struct sk_buff *skb)
+void ovs_dp_process_packet(struct sk_buff *skb)
{
const struct vport *p = OVS_CB(skb)->input_vport;
+ struct sw_flow_key *pkt_key = OVS_CB(skb)->pkt_key;
struct datapath *dp = p->dp;
struct sw_flow *flow;
struct dp_stats_percpu *stats;
- struct sw_flow_key key;
u64 *stats_counter;
u32 n_mask_hit;
- int error;
stats = this_cpu_ptr(dp->stats_percpu);
- /* Extract flow from 'skb' into 'key'. */
- error = ovs_flow_key_extract(skb, &key);
- if (unlikely(error)) {
- kfree_skb(skb);
- return;
- }
-
/* Look up flow. */
- flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit);
+ flow = ovs_flow_tbl_lookup_stats(&dp->table, pkt_key, &n_mask_hit);
if (unlikely(!flow)) {
struct dp_upcall_info upcall;
+ int error;
upcall.cmd = OVS_PACKET_CMD_MISS;
- upcall.key = &key;
+ upcall.key = pkt_key;
upcall.userdata = NULL;
upcall.portid = ovs_vport_find_upcall_portid(p, skb);
error = ovs_dp_upcall(dp, skb, &upcall);
@@ -276,7 +269,7 @@ void ovs_dp_process_received_packet(struct sk_buff *skb)
}
OVS_CB(skb)->flow = flow;
- ovs_flow_stats_update(OVS_CB(skb)->flow, key.tp.flags, skb);
+ ovs_flow_stats_update(OVS_CB(skb)->flow, pkt_key->tp.flags, skb);
ovs_execute_actions(dp, skb);
stats_counter = &stats->n_hit;
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index 9d5b7d1..fdd96c0 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -96,15 +96,15 @@ struct datapath {
* struct ovs_skb_cb - OVS data in skb CB
* @flow: The flow associated with this packet. May be %NULL if no flow.
* @pkt_key: The flow information extracted from the packet. Must be nonnull.
- * @tun_key: Key for the tunnel that encapsulated this packet. NULL if the
- * packet is not being tunneled.
+ * @egress_tun_key: Tunnel information about this packet on egress path.
+ * NULL if the packet is not being tunneled.
* @input_vport: The original vport packet came in on. This value is cached
* when a packet is received by OVS.
*/
struct ovs_skb_cb {
struct sw_flow *flow;
struct sw_flow_key *pkt_key;
- struct ovs_key_ipv4_tunnel *tun_key;
+ struct ovs_key_ipv4_tunnel *egress_tun_key;
struct vport *input_vport;
};
#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
@@ -186,7 +186,7 @@ static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_n
extern struct notifier_block ovs_dp_device_notifier;
extern struct genl_family dp_vport_genl_family;
-void ovs_dp_process_received_packet(struct sk_buff *);
+void ovs_dp_process_packet(struct sk_buff *);
void ovs_dp_detach_port(struct vport *);
int ovs_dp_upcall(struct datapath *, struct sk_buff *,
const struct dp_upcall_info *);
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index d264125..3faffb9 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -608,12 +608,13 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
return 0;
}
-int ovs_flow_key_extract(struct sk_buff *skb, struct sw_flow_key *key)
+int ovs_flow_key_extract(struct ovs_key_ipv4_tunnel *tun_key,
+ struct sk_buff *skb, struct sw_flow_key *key)
{
/* Extract metadata from packet. */
memset(key, 0, sizeof(*key));
- if (OVS_CB(skb)->tun_key)
- memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
+ if (tun_key)
+ memcpy(&key->tun_key, tun_key, sizeof(key->tun_key));
key->phy.priority = skb->priority;
key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 251789b..3869a54 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -187,7 +187,8 @@ void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
void ovs_flow_stats_clear(struct sw_flow *);
u64 ovs_flow_used_time(unsigned long flow_jiffies);
-int ovs_flow_key_extract(struct sk_buff *skb, struct sw_flow_key *key);
+int ovs_flow_key_extract(struct ovs_key_ipv4_tunnel *tun_key,
+ struct sk_buff *skb, struct sw_flow_key *key);
/* Extract key from packet coming from userspace. */
int ovs_flow_key_extract_userspace(const struct nlattr *attr,
struct sk_buff *skb,
diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c
index f49148a..e92617b 100644
--- a/net/openvswitch/vport-gre.c
+++ b/net/openvswitch/vport-gre.c
@@ -63,7 +63,7 @@ static __be16 filter_tnl_flags(__be16 flags)
static struct sk_buff *__build_header(struct sk_buff *skb,
int tunnel_hlen)
{
- const struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->tun_key;
+ const struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->egress_tun_key;
struct tnl_ptk_info tpi;
skb = gre_handle_offloads(skb, !!(tun_key->tun_flags & TUNNEL_CSUM));
@@ -129,6 +129,7 @@ static int gre_err(struct sk_buff *skb, u32 info,
static int gre_tnl_send(struct vport *vport, struct sk_buff *skb)
{
struct net *net = ovs_dp_get_net(vport->dp);
+ struct ovs_key_ipv4_tunnel *tun_key;
struct flowi4 fl;
struct rtable *rt;
int min_headroom;
@@ -136,16 +137,17 @@ static int gre_tnl_send(struct vport *vport, struct sk_buff *skb)
__be16 df;
int err;
- if (unlikely(!OVS_CB(skb)->tun_key)) {
+ if (unlikely(!OVS_CB(skb)->egress_tun_key)) {
err = -EINVAL;
goto error;
}
+ tun_key = OVS_CB(skb)->egress_tun_key;
/* Route lookup */
memset(&fl, 0, sizeof(fl));
- fl.daddr = OVS_CB(skb)->tun_key->ipv4_dst;
- fl.saddr = OVS_CB(skb)->tun_key->ipv4_src;
- fl.flowi4_tos = RT_TOS(OVS_CB(skb)->tun_key->ipv4_tos);
+ fl.daddr = tun_key->ipv4_dst;
+ fl.saddr = tun_key->ipv4_src;
+ fl.flowi4_tos = RT_TOS(tun_key->ipv4_tos);
fl.flowi4_mark = skb->mark;
fl.flowi4_proto = IPPROTO_GRE;
@@ -153,7 +155,7 @@ static int gre_tnl_send(struct vport *vport, struct sk_buff *skb)
if (IS_ERR(rt))
return PTR_ERR(rt);
- tunnel_hlen = ip_gre_calc_hlen(OVS_CB(skb)->tun_key->tun_flags);
+ tunnel_hlen = ip_gre_calc_hlen(tun_key->tun_flags);
min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
+ tunnel_hlen + sizeof(struct iphdr)
@@ -185,15 +187,15 @@ static int gre_tnl_send(struct vport *vport, struct sk_buff *skb)
goto err_free_rt;
}
- df = OVS_CB(skb)->tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ?
+ df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ?
htons(IP_DF) : 0;
skb->ignore_df = 1;
return iptunnel_xmit(skb->sk, rt, skb, fl.saddr,
- OVS_CB(skb)->tun_key->ipv4_dst, IPPROTO_GRE,
- OVS_CB(skb)->tun_key->ipv4_tos,
- OVS_CB(skb)->tun_key->ipv4_ttl, df, false);
+ tun_key->ipv4_dst, IPPROTO_GRE,
+ tun_key->ipv4_tos,
+ tun_key->ipv4_ttl, df, false);
err_free_rt:
ip_rt_put(rt);
error:
diff --git a/net/openvswitch/vport-vxlan.c b/net/openvswitch/vport-vxlan.c
index d8b7e24..d3f088f 100644
--- a/net/openvswitch/vport-vxlan.c
+++ b/net/openvswitch/vport-vxlan.c
@@ -140,22 +140,24 @@ static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
struct net *net = ovs_dp_get_net(vport->dp);
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sk(vxlan_port->vs->sock->sk)->inet_sport;
+ struct ovs_key_ipv4_tunnel *tun_key;
struct rtable *rt;
struct flowi4 fl;
__be16 src_port;
__be16 df;
int err;
- if (unlikely(!OVS_CB(skb)->tun_key)) {
+ if (unlikely(!OVS_CB(skb)->egress_tun_key)) {
err = -EINVAL;
goto error;
}
+ tun_key = OVS_CB(skb)->egress_tun_key;
/* Route lookup */
memset(&fl, 0, sizeof(fl));
- fl.daddr = OVS_CB(skb)->tun_key->ipv4_dst;
- fl.saddr = OVS_CB(skb)->tun_key->ipv4_src;
- fl.flowi4_tos = RT_TOS(OVS_CB(skb)->tun_key->ipv4_tos);
+ fl.daddr = tun_key->ipv4_dst;
+ fl.saddr = tun_key->ipv4_src;
+ fl.flowi4_tos = RT_TOS(tun_key->ipv4_tos);
fl.flowi4_mark = skb->mark;
fl.flowi4_proto = IPPROTO_UDP;
@@ -165,7 +167,7 @@ static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
goto error;
}
- df = OVS_CB(skb)->tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ?
+ df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ?
htons(IP_DF) : 0;
skb->ignore_df = 1;
@@ -173,11 +175,11 @@ static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
src_port = udp_flow_src_port(net, skb, 0, 0, true);
err = vxlan_xmit_skb(vxlan_port->vs, rt, skb,
- fl.saddr, OVS_CB(skb)->tun_key->ipv4_dst,
- OVS_CB(skb)->tun_key->ipv4_tos,
- OVS_CB(skb)->tun_key->ipv4_ttl, df,
+ fl.saddr, tun_key->ipv4_dst,
+ tun_key->ipv4_tos,
+ tun_key->ipv4_ttl, df,
src_port, dst_port,
- htonl(be64_to_cpu(OVS_CB(skb)->tun_key->tun_id) << 8),
+ htonl(be64_to_cpu(tun_key->tun_id) << 8),
false);
if (err < 0)
ip_rt_put(rt);
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index d21251f..d3f76df 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -435,6 +435,8 @@ void ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
struct ovs_key_ipv4_tunnel *tun_key)
{
struct pcpu_sw_netstats *stats;
+ struct sw_flow_key key;
+ int error;
stats = this_cpu_ptr(vport->percpu_stats);
u64_stats_update_begin(&stats->syncp);
@@ -442,9 +444,15 @@ void ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
stats->rx_bytes += skb->len;
u64_stats_update_end(&stats->syncp);
- OVS_CB(skb)->tun_key = tun_key;
OVS_CB(skb)->input_vport = vport;
- ovs_dp_process_received_packet(skb);
+ OVS_CB(skb)->egress_tun_key = NULL;
+ /* Extract flow from 'skb' into 'key'. */
+ error = ovs_flow_key_extract(tun_key, skb, &key);
+ if (unlikely(error)) {
+ kfree_skb(skb);
+ return;
+ }
+ ovs_dp_process_packet(skb);
}
/**
--
1.9.3
--
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