cfg80211: show interface type

This patch makes cfg80211 show the interface in the nl80211
information about a specific interface. API users are required
to keep the type updated (everything else is fairly complicated)
but you will get a warning if you fail to keep it updated.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 9f40c4d..0e85ec3 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -363,11 +363,13 @@ struct wiphy;
  * wireless extensions but this is subject to reevaluation as soon as this
  * code is used more widely and we have a first user without wext.
  *
- * @add_virtual_intf: create a new virtual interface with the given name
+ * @add_virtual_intf: create a new virtual interface with the given name,
+ *     must set the struct wireless_dev's iftype.
  *
  * @del_virtual_intf: remove the virtual interface determined by ifindex.
  *
- * @change_virtual_intf: change type of virtual interface
+ * @change_virtual_intf: change type/configuration of virtual interface,
+ *     keep the struct wireless_dev's iftype updated.
  *
  * @add_key: add a key with the given parameters. @mac_addr will be %NULL
  *     when adding a group key.

diff --git a/include/net/wireless.h b/include/net/wireless.h
index 0de7fde..721efb3 100644 (file)
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -223,9 +223,11 @@ struct wiphy {
  * the netdev.)
  *
  * @wiphy: pointer to hardware description
+ * @iftype: interface type
  */
 struct wireless_dev {
        struct wiphy *wiphy;
+       enum nl80211_iftype iftype;
 
        /* private to the generic wireless code */
        struct list_head list;

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index a72fbeb..b5cd91e 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -625,6 +625,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
        /* and set some type-dependent values */
        sdata->vif.type = type;
        sdata->dev->hard_start_xmit = ieee80211_subif_start_xmit;
+       sdata->wdev.iftype = type;
 
        /* only monitor differs */
        sdata->dev->type = ARPHRD_ETHER;

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 88cb733..d694008 100644 (file)
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -384,6 +384,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 
        rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
 
+       WARN_ON(dev->ieee80211_ptr->iftype == NL80211_IFTYPE_UNSPECIFIED);
+
        switch (state) {
        case NETDEV_REGISTER:
                mutex_lock(&rdev->devlist_mtx);

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 1221d72..44771a6 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -299,7 +299,7 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
        NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
-       /* TODO: interface type */
+       NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
        return genlmsg_end(msg, hdr);
 
  nla_put_failure:
@@ -453,6 +453,10 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
                                  &flags);
        err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
                                            type, err ? NULL : &flags, &params);
+
+       dev = __dev_get_by_index(&init_net, ifindex);
+       WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
+
        rtnl_unlock();
 
  unlock: