nl80211: send interface after creation

After a new virtual interface is created, reply
to userspace with a message detailing it so it
knows the new wdev identifier.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 789d0c7..6a9a1d7 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1972,6 +1972,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct vif_params params;
        struct wireless_dev *wdev;
+       struct sk_buff *msg;
        int err;
        enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
        u32 flags;
@@ -1998,14 +1999,20 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
                        return err;
        }
 
+       msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+       if (!msg)
+               return -ENOMEM;
+
        err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
                                  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
                                  &flags);
        wdev = rdev->ops->add_virtual_intf(&rdev->wiphy,
                nla_data(info->attrs[NL80211_ATTR_IFNAME]),
                type, err ? NULL : &flags, &params);
-       if (IS_ERR(wdev))
+       if (IS_ERR(wdev)) {
+               nlmsg_free(msg);
                return PTR_ERR(wdev);
+       }
 
        if (type == NL80211_IFTYPE_MESH_POINT &&
            info->attrs[NL80211_ATTR_MESH_ID]) {
@@ -2019,7 +2026,13 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
                wdev_unlock(wdev);
        }
 
-       return 0;
+       if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
+                              rdev, wdev) < 0) {
+               nlmsg_free(msg);
+               return -ENOBUFS;
+       }
+
+       return genlmsg_reply(msg, info);
 }
 
 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)