3 files changed, 20 insertions, 0 deletions

diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index d120f9fe0017..07ef2c3e21fa 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -75,6 +75,7 @@ enum ovs_datapath_attr {
         OVS_DP_ATTR_UPCALL_PID,         /* Netlink PID to receive upcalls */
         OVS_DP_ATTR_STATS,              /* struct ovs_dp_stats */
         OVS_DP_ATTR_MEGAFLOW_STATS,     /* struct ovs_dp_megaflow_stats */
+        OVS_DP_ATTR_USER_FEATURES,      /* OVS_DP_F_*  */
         __OVS_DP_ATTR_MAX
 };
 
@@ -106,6 +107,9 @@ struct ovs_vport_stats {
         __u64   tx_dropped;             /* no space available in linux  */
 };
 
+/* Allow last Netlink attribute to be unaligned */
+#define OVS_DP_F_UNALIGNED      (1 << 0)
+
 /* Fixed logical ports. */
 #define OVSP_LOCAL      ((__u32)0)
 
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 50d7782d8d7c..6a9b0cb8a1db 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1040,6 +1040,7 @@ static const struct genl_ops dp_flow_genl_ops[] = {
 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
         [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
         [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
+        [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
 };
 
 static struct genl_family dp_datapath_genl_family = {
@@ -1098,6 +1099,9 @@ static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
                         &dp_megaflow_stats))
                 goto nla_put_failure;
 
+        if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
+                goto nla_put_failure;
+
         return genlmsg_end(skb, ovs_header);
 
 nla_put_failure:
@@ -1144,6 +1148,12 @@ static struct datapath *lookup_datapath(struct net *net,
         return dp ? dp : ERR_PTR(-ENODEV);
 }
 
+static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
+{
+        if (a[OVS_DP_ATTR_USER_FEATURES])
+                dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
+}
+
 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 {
         struct nlattr **a = info->attrs;
@@ -1202,6 +1212,8 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
         parms.port_no = OVSP_LOCAL;
         parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
 
+        ovs_dp_change(dp, a);
+
         vport = new_vport(&parms);
         if (IS_ERR(vport)) {
                 err = PTR_ERR(vport);
@@ -1305,6 +1317,8 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
         if (IS_ERR(dp))
                 goto unlock;
 
+        ovs_dp_change(dp, info->attrs);
+
         reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
         if (IS_ERR(reply)) {
                 err = PTR_ERR(reply);
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index ba13be4a680f..62619a4ee649 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -88,6 +88,8 @@ struct datapath {
         /* Network namespace ref. */
         struct net *net;
 #endif
+
+        u32 user_features;
 };
 
 /**