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openvswitch: Remove redundant key ref from upcall_info.

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struct dp_upcall_info has pointer to pkt_key which is already
available in OVS_CB.  This also simplifies upcall handling
for gso packet.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Pravin B Shelar 2014-11-06 06:57:27 -08:00
parent fff06c36a2
commit e8eedb85bd
3 changed files with 32 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

45
net/openvswitch/datapath.c
View file

@ -136,8 +136,10 @@ EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held);
static struct vport *new_vport(const struct vport_parms *);
static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
const struct sw_flow_key *,
const struct dp_upcall_info *);
static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
const struct sw_flow_key *,
const struct dp_upcall_info *);
/* Must be called with rcu_read_lock. */
@ -271,11 +273,10 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
int error;
upcall.cmd = OVS_PACKET_CMD_MISS;
upcall.key = key;
upcall.userdata = NULL;
upcall.portid = ovs_vport_find_upcall_portid(p, skb);
upcall.egress_tun_info = NULL;
error = ovs_dp_upcall(dp, skb, &upcall);
error = ovs_dp_upcall(dp, skb, key, &upcall);
if (unlikely(error))
kfree_skb(skb);
else
@ -299,6 +300,7 @@ out:
}
int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
const struct sw_flow_key *key,
const struct dp_upcall_info *upcall_info)
{
struct dp_stats_percpu *stats;
@ -310,9 +312,9 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
}
if (!skb_is_gso(skb))
err = queue_userspace_packet(dp, skb, upcall_info);
err = queue_userspace_packet(dp, skb, key, upcall_info);
else
err = queue_gso_packets(dp, skb, upcall_info);
err = queue_gso_packets(dp, skb, key, upcall_info);
if (err)
goto err;
@ -329,39 +331,43 @@ err:
}
static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
const struct sw_flow_key *key,
const struct dp_upcall_info *upcall_info)
{
unsigned short gso_type = skb_shinfo(skb)->gso_type;
struct dp_upcall_info later_info;
struct sw_flow_key later_key;
struct sk_buff *segs, *nskb;
struct ovs_skb_cb ovs_cb;
int err;
ovs_cb = *OVS_CB(skb);
segs = __skb_gso_segment(skb, NETIF_F_SG, false);
*OVS_CB(skb) = ovs_cb;
if (IS_ERR(segs))
return PTR_ERR(segs);
if (segs == NULL)
return -EINVAL;
if (gso_type & SKB_GSO_UDP) {
/* The initial flow key extracted by ovs_flow_key_extract()
* in this case is for a first fragment, so we need to
* properly mark later fragments.
*/
later_key = *key;
later_key.ip.frag = OVS_FRAG_TYPE_LATER;
}
/* Queue all of the segments. */
skb = segs;
do {
err = queue_userspace_packet(dp, skb, upcall_info);
*OVS_CB(skb) = ovs_cb;
if (gso_type & SKB_GSO_UDP && skb != segs)
key = &later_key;
err = queue_userspace_packet(dp, skb, key, upcall_info);
if (err)
break;
if (skb == segs && gso_type & SKB_GSO_UDP) {
/* The initial flow key extracted by ovs_flow_extract()
* in this case is for a first fragment, so we need to
* properly mark later fragments.
*/
later_key = *upcall_info->key;
later_key.ip.frag = OVS_FRAG_TYPE_LATER;
later_info = *upcall_info;
later_info.key = &later_key;
upcall_info = &later_info;
}
} while ((skb = skb->next));
/* Free all of the segments. */
@ -395,6 +401,7 @@ static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info,
}
static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
const struct sw_flow_key *key,
const struct dp_upcall_info *upcall_info)
{
struct ovs_header *upcall;
@ -457,7 +464,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
upcall->dp_ifindex = dp_ifindex;
nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
err = ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);
err = ovs_nla_put_flow(key, key, user_skb);
BUG_ON(err);
nla_nest_end(user_skb, nla);