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authorWilliam Tu <u9012063@gmail.com>2016-06-10 11:49:33 -0700
committerDavid S. Miller <davem@davemloft.net>2016-06-10 17:58:03 -0700
commitf2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 (patch)
tree7824d6446b4fd259cc7430641fd27475445361ba /net/openvswitch/flow_netlink.c
parent1578b0a5e92825334760741e5c166b8873886f1b (diff)
openvswitch: Add packet truncation support.
The patch adds a new OVS action, OVS_ACTION_ATTR_TRUNC, in order to truncate packets. A 'max_len' is added for setting up the maximum packet size, and a 'cutlen' field is to record the number of bytes to trim the packet when the packet is outputting to a port, or when the packet is sent to userspace. Signed-off-by: William Tu <u9012063@gmail.com> Cc: Pravin Shelar <pshelar@nicira.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/flow_netlink.c')
-rw-r--r--net/openvswitch/flow_netlink.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index 0bb650f4f219..c78a6a1476fb 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -2229,6 +2229,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
[OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
[OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
[OVS_ACTION_ATTR_CT] = (u32)-1,
+ [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
};
const struct ovs_action_push_vlan *vlan;
int type = nla_type(a);
@@ -2255,6 +2256,14 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
return -EINVAL;
break;
+ case OVS_ACTION_ATTR_TRUNC: {
+ const struct ovs_action_trunc *trunc = nla_data(a);
+
+ if (trunc->max_len < ETH_HLEN)
+ return -EINVAL;
+ break;
+ }
+
case OVS_ACTION_ATTR_HASH: {
const struct ovs_action_hash *act_hash = nla_data(a);