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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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14
net/mac80211/ieee80211_i.h
View File

@@ -472,6 +472,16 @@ enum ieee80211_sub_if_data_flags {
IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
};
/**
* enum ieee80211_sdata_state_bits - virtual interface state bits
* @SDATA_STATE_RUNNING: virtual interface is up & running; this
* mirrors netif_running() but is separate for interface type
* change handling while the interface is up
*/
enum ieee80211_sdata_state_bits {
SDATA_STATE_RUNNING,
};
struct ieee80211_sub_if_data {
struct list_head list;
@@ -485,6 +495,8 @@ struct ieee80211_sub_if_data {
unsigned int flags;
unsigned long state;
int drop_unencrypted;
char name[IFNAMSIZ];
@@ -1087,7 +1099,7 @@ void ieee80211_recalc_idle(struct ieee80211_local *local);
static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
{
return netif_running(sdata->dev);
return test_bit(SDATA_STATE_RUNNING, &sdata->state);
}
/* tx handling */