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>

1 files changed, 15 insertions, 2 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 789d0c7b287e..6a9a1d7f51d1 100644
--- 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)