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mac80211: support runtime interface type changes

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Add support to mac80211 for changing the interface
type even when the interface is UP, if the driver
supports it.

To achieve this
 * add a new driver callback for switching,
 * split some of the interface up/down code out
   into new functions (do_open/do_stop), and
 * maintain an own __SDATA_RUNNING bit that will
   not be set during interface type, so that any
   other code doesn't use the interface.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2010-08-27 12:35:58 +02:00
committed by John W. Linville
parent 87490f6db3
commit 34d4bc4d41
6 changed files with 185 additions and 37 deletions
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9
include/net/mac80211.h
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@@ -1537,6 +1537,12 @@ enum ieee80211_ampdu_mlme_action {
* negative error code (which will be seen in userspace.)
* Must be implemented and can sleep.
*
* @change_interface: Called when a netdevice changes type. This callback
* is optional, but only if it is supported can interface types be
* switched while the interface is UP. The callback may sleep.
* Note that while an interface is being switched, it will not be
* found by the interface iteration callbacks.
*
* @remove_interface: Notifies a driver that an interface is going down.
* The @stop callback is called after this if it is the last interface
* and no monitor interfaces are present.
@@ -1693,6 +1699,9 @@ struct ieee80211_ops {
void (*stop)(struct ieee80211_hw *hw);
int (*add_interface)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
int (*change_interface)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum nl80211_iftype new_type);
void (*remove_interface)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
int (*config)(struct ieee80211_hw *hw, u32 changed);