[PATCH] mac80211: revamp interface and filter configuration

Drivers are currently supposed to keep track of monitor
interfaces if they allow so-called "hard" monitor, and
they are also supposed to keep track of multicast etc.

This patch changes that, replaces the set_multicast_list()
callback with a new configure_filter() callback that takes
filter flags (FIF_*) instead of interface flags (IFF_*).
For a driver, this means it should open the filter as much
as necessary to get all frames requested by the filter flags.
Accordingly, the filter flags are named "positively", e.g.
FIF_ALLMULTI.

Multicast filtering is a bit special in that drivers that
have no multicast address filters need to allow multicast
frames through when either the FIF_ALLMULTI flag is set or
when the mc_count value is positive.

At the same time, drivers are no longer notified about
monitor interfaces at all, this means they now need to
implement the start() and stop() callbacks and the new
change_filter_flags() callback. Also, the start()/stop()
ordering changed, start() is now called *before* any
add_interface() as it really should be, and stop() after
any remove_interface().

The patch also changes the behaviour of setting the bssid
to multicast for scanning when IEEE80211_HW_NO_PROBE_FILTERING
is set; the IEEE80211_HW_NO_PROBE_FILTERING flag is removed
and the filter flag FIF_BCN_PRBRESP_PROMISC introduced.
This is a lot more efficient for hardware like b43 that
supports it and other hardware can still set the BSSID
to all-ones.

Driver modifications by Johannes Berg (b43 & iwlwifi), Michael Wu
(rtl8187, adm8211, and p54), Larry Finger (b43legacy), and
Ivo van Doorn (rt2x00).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 11 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index a0f05ca..8d20811 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -220,11 +220,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	struct data_ring *ring = entry->ring;
 	struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
 	struct sk_buff *skb;
-	int retval;
-	int signal;
-	int rssi;
-	int ofdm;
-	int size;
+	struct rxdata_entry_desc desc;
 	int frame_size;
 
 	if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
@@ -239,10 +235,8 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	if (urb->actual_length < entry->ring->desc_size || urb->status)
 		goto skip_entry;
 
-	retval = rt2x00dev->ops->lib->fill_rxdone(entry, &signal, &rssi,
-						  &ofdm, &size);
-	if (retval)
-		goto skip_entry;
+	memset(&desc, 0x00, sizeof(desc));
+	rt2x00dev->ops->lib->fill_rxdone(entry, &desc);
 
 	/*
 	 * Allocate a new sk buffer to replace the current one.
@@ -261,12 +255,12 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	 * Trim the skb_buffer to only contain the valid
 	 * frame data (so ignore the device's descriptor).
 	 */
-	skb_trim(entry->skb, size);
+	skb_trim(entry->skb, desc.size);
 
 	/*
 	 * Send the frame to rt2x00lib for further processing.
 	 */
-	rt2x00lib_rxdone(entry, entry->skb, signal, rssi, ofdm);
+	rt2x00lib_rxdone(entry, entry->skb, &desc);
 
 	/*
 	 * Replace current entry's skb with the newly allocated one,