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Diffstat (limited to 'net/openvswitch/datapath.c')
-rw-r--r--net/openvswitch/datapath.c42
1 files changed, 29 insertions, 13 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 856bd8dba676..524c0fd3078e 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -137,10 +137,12 @@ 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 *);
+ const struct dp_upcall_info *,
+ uint32_t cutlen);
static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
const struct sw_flow_key *,
- const struct dp_upcall_info *);
+ const struct dp_upcall_info *,
+ uint32_t cutlen);
/* Must be called with rcu_read_lock. */
static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex)
@@ -275,7 +277,7 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
upcall.cmd = OVS_PACKET_CMD_MISS;
upcall.portid = ovs_vport_find_upcall_portid(p, skb);
upcall.mru = OVS_CB(skb)->mru;
- error = ovs_dp_upcall(dp, skb, key, &upcall);
+ error = ovs_dp_upcall(dp, skb, key, &upcall, 0);
if (unlikely(error))
kfree_skb(skb);
else
@@ -300,7 +302,8 @@ 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)
+ const struct dp_upcall_info *upcall_info,
+ uint32_t cutlen)
{
struct dp_stats_percpu *stats;
int err;
@@ -311,9 +314,9 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
}
if (!skb_is_gso(skb))
- err = queue_userspace_packet(dp, skb, key, upcall_info);
+ err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
else
- err = queue_gso_packets(dp, skb, key, upcall_info);
+ err = queue_gso_packets(dp, skb, key, upcall_info, cutlen);
if (err)
goto err;
@@ -331,7 +334,8 @@ 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)
+ const struct dp_upcall_info *upcall_info,
+ uint32_t cutlen)
{
unsigned short gso_type = skb_shinfo(skb)->gso_type;
struct sw_flow_key later_key;
@@ -360,7 +364,7 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
if (gso_type & SKB_GSO_UDP && skb != segs)
key = &later_key;
- err = queue_userspace_packet(dp, skb, key, upcall_info);
+ err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
if (err)
break;
@@ -383,7 +387,8 @@ static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info,
{
size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
+ nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
- + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */
+ + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
+ + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
/* OVS_PACKET_ATTR_USERDATA */
if (upcall_info->userdata)
@@ -416,7 +421,8 @@ static void pad_packet(struct datapath *dp, struct sk_buff *skb)
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)
+ const struct dp_upcall_info *upcall_info,
+ uint32_t cutlen)
{
struct ovs_header *upcall;
struct sk_buff *nskb = NULL;
@@ -461,7 +467,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
else
hlen = skb->len;
- len = upcall_msg_size(upcall_info, hlen);
+ len = upcall_msg_size(upcall_info, hlen - cutlen);
user_skb = genlmsg_new(len, GFP_ATOMIC);
if (!user_skb) {
err = -ENOMEM;
@@ -509,15 +515,25 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
pad_packet(dp, user_skb);
}
+ /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
+ if (cutlen > 0) {
+ if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN,
+ skb->len)) {
+ err = -ENOBUFS;
+ goto out;
+ }
+ pad_packet(dp, user_skb);
+ }
+
/* Only reserve room for attribute header, packet data is added
* in skb_zerocopy() */
if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
err = -ENOBUFS;
goto out;
}
- nla->nla_len = nla_attr_size(skb->len);
+ nla->nla_len = nla_attr_size(skb->len - cutlen);
- err = skb_zerocopy(user_skb, skb, skb->len, hlen);
+ err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen);
if (err)
goto out;