2007-05-06 02:45:53 +08:00
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/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitmap.h>
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2009-04-16 19:17:25 +08:00
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#include <linux/pm_qos_params.h>
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2007-09-18 02:56:21 +08:00
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#include <net/net_namespace.h>
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2007-05-06 02:45:53 +08:00
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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2009-04-24 00:52:52 +08:00
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#include "driver-ops.h"
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2008-04-09 03:14:40 +08:00
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#include "rate.h"
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2008-02-23 22:17:18 +08:00
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#include "mesh.h"
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2007-05-06 02:45:53 +08:00
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#include "wep.h"
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#include "wme.h"
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#include "aes_ccm.h"
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2008-04-09 03:14:40 +08:00
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#include "led.h"
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2007-09-19 05:29:21 +08:00
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#include "cfg.h"
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2007-05-06 02:46:38 +08:00
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#include "debugfs.h"
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#include "debugfs_netdev.h"
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2007-05-06 02:45:53 +08:00
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2007-07-11 01:32:08 +08:00
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/*
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* For seeing transmitted packets on monitor interfaces
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* we have a radiotap header too.
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*/
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struct ieee80211_tx_status_rtap_hdr {
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struct ieee80211_radiotap_header hdr;
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2008-10-21 18:40:02 +08:00
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u8 rate;
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u8 padding_for_rate;
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2007-07-11 01:32:08 +08:00
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__le16 tx_flags;
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u8 data_retries;
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} __attribute__ ((packed));
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2007-05-06 02:45:53 +08:00
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2008-09-11 06:01:59 +08:00
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void ieee80211_configure_filter(struct ieee80211_local *local)
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[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>
2007-09-17 13:29:23 +08:00
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{
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2009-08-17 22:16:53 +08:00
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u64 mc;
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[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>
2007-09-17 13:29:23 +08:00
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unsigned int changed_flags;
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unsigned int new_flags = 0;
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2007-09-26 21:19:47 +08:00
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if (atomic_read(&local->iff_promiscs))
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[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>
2007-09-17 13:29:23 +08:00
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new_flags |= FIF_PROMISC_IN_BSS;
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2007-09-26 21:19:47 +08:00
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if (atomic_read(&local->iff_allmultis))
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[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>
2007-09-17 13:29:23 +08:00
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new_flags |= FIF_ALLMULTI;
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2009-08-17 22:16:53 +08:00
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if (local->monitors || local->scanning)
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2008-02-01 02:48:23 +08:00
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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if (local->fif_fcsfail)
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new_flags |= FIF_FCSFAIL;
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if (local->fif_plcpfail)
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new_flags |= FIF_PLCPFAIL;
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if (local->fif_control)
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new_flags |= FIF_CONTROL;
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if (local->fif_other_bss)
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new_flags |= FIF_OTHER_BSS;
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[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>
2007-09-17 13:29:23 +08:00
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2009-08-04 20:48:51 +08:00
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if (local->fif_pspoll)
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new_flags |= FIF_PSPOLL;
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2009-08-17 22:16:53 +08:00
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spin_lock_bh(&local->filter_lock);
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[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>
2007-09-17 13:29:23 +08:00
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changed_flags = local->filter_flags ^ new_flags;
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2009-08-17 22:16:53 +08:00
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mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
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spin_unlock_bh(&local->filter_lock);
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[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>
2007-09-17 13:29:23 +08:00
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/* be a bit nasty */
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new_flags |= (1<<31);
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2009-08-17 22:16:53 +08:00
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drv_configure_filter(local, changed_flags, &new_flags, mc);
|
[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>
2007-09-17 13:29:23 +08:00
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WARN_ON(new_flags & (1<<31));
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local->filter_flags = new_flags & ~(1<<31);
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}
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2009-08-17 22:16:53 +08:00
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static void ieee80211_reconfig_filter(struct work_struct *work)
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{
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, reconfig_filter);
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ieee80211_configure_filter(local);
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}
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2008-10-09 18:18:51 +08:00
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int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
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2007-07-27 21:43:23 +08:00
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{
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mac80211: fix scan channel race
When a software scan starts, it first sets sw_scanning, but
leaves the scan_channel "unset" (it currently actually gets
initialised to a default). Now, when something else tries
to (re)configure the hardware in the window between these two
events (after sw_scanning = true, but before scan_channel is
set), the current code switches to the (unset!) scan_channel.
This causes trouble, especially when switching bands and
sending frames on the wrong channel.
To work around this, leave scan_channel initialised to NULL
and use it to determine whether or not a switch to a different
channel should occur (and also use the same condition to check
whether to adjust power for scan or not).
Additionally, avoid reconfiguring the hardware completely when
recalculating idle resulted in no changes, this was the problem
that originally led us to discover the race condition in the
first place, which was helpfully bisected by Pavel. This part
of the patch should not be necessary with the other fixes, but
not calling the ieee80211_hw_config function when we know it to
be unnecessary is certainly a correct thing to do.
Unfortunately, this patch cannot and does not fix the race
condition completely, but due to the way the scan code is
structured it makes the particular problem Pavel discovered
(race while changing channel at the same time as transmitting
frames) go away. To fix it completely, more work especially
with locking configuration is needed.
Bisected-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-05-07 20:23:01 +08:00
|
|
|
struct ieee80211_channel *chan, *scan_chan;
|
2007-07-27 21:43:23 +08:00
|
|
|
int ret = 0;
|
2008-10-09 18:18:51 +08:00
|
|
|
int power;
|
2008-12-12 14:27:43 +08:00
|
|
|
enum nl80211_channel_type channel_type;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-10-14 22:38:55 +08:00
|
|
|
might_sleep();
|
|
|
|
|
|
mac80211: fix scan channel race
When a software scan starts, it first sets sw_scanning, but
leaves the scan_channel "unset" (it currently actually gets
initialised to a default). Now, when something else tries
to (re)configure the hardware in the window between these two
events (after sw_scanning = true, but before scan_channel is
set), the current code switches to the (unset!) scan_channel.
This causes trouble, especially when switching bands and
sending frames on the wrong channel.
To work around this, leave scan_channel initialised to NULL
and use it to determine whether or not a switch to a different
channel should occur (and also use the same condition to check
whether to adjust power for scan or not).
Additionally, avoid reconfiguring the hardware completely when
recalculating idle resulted in no changes, this was the problem
that originally led us to discover the race condition in the
first place, which was helpfully bisected by Pavel. This part
of the patch should not be necessary with the other fixes, but
not calling the ieee80211_hw_config function when we know it to
be unnecessary is certainly a correct thing to do.
Unfortunately, this patch cannot and does not fix the race
condition completely, but due to the way the scan code is
structured it makes the particular problem Pavel discovered
(race while changing channel at the same time as transmitting
frames) go away. To fix it completely, more work especially
with locking configuration is needed.
Bisected-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-05-07 20:23:01 +08:00
|
|
|
scan_chan = local->scan_channel;
|
|
|
|
|
|
|
|
|
|
if (scan_chan) {
|
|
|
|
|
chan = scan_chan;
|
2008-12-12 14:27:43 +08:00
|
|
|
channel_type = NL80211_CHAN_NO_HT;
|
2008-11-26 22:15:24 +08:00
|
|
|
} else {
|
2007-07-27 21:43:23 +08:00
|
|
|
chan = local->oper_channel;
|
2008-12-12 14:27:43 +08:00
|
|
|
channel_type = local->oper_channel_type;
|
2008-11-26 22:15:24 +08:00
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-11-26 22:15:24 +08:00
|
|
|
if (chan != local->hw.conf.channel ||
|
2009-01-07 17:13:27 +08:00
|
|
|
channel_type != local->hw.conf.channel_type) {
|
2008-10-09 18:18:51 +08:00
|
|
|
local->hw.conf.channel = chan;
|
2009-01-07 17:13:27 +08:00
|
|
|
local->hw.conf.channel_type = channel_type;
|
2008-10-09 18:18:51 +08:00
|
|
|
changed |= IEEE80211_CONF_CHANGE_CHANNEL;
|
|
|
|
|
}
|
2008-01-25 02:38:38 +08:00
|
|
|
|
mac80211: fix scan channel race
When a software scan starts, it first sets sw_scanning, but
leaves the scan_channel "unset" (it currently actually gets
initialised to a default). Now, when something else tries
to (re)configure the hardware in the window between these two
events (after sw_scanning = true, but before scan_channel is
set), the current code switches to the (unset!) scan_channel.
This causes trouble, especially when switching bands and
sending frames on the wrong channel.
To work around this, leave scan_channel initialised to NULL
and use it to determine whether or not a switch to a different
channel should occur (and also use the same condition to check
whether to adjust power for scan or not).
Additionally, avoid reconfiguring the hardware completely when
recalculating idle resulted in no changes, this was the problem
that originally led us to discover the race condition in the
first place, which was helpfully bisected by Pavel. This part
of the patch should not be necessary with the other fixes, but
not calling the ieee80211_hw_config function when we know it to
be unnecessary is certainly a correct thing to do.
Unfortunately, this patch cannot and does not fix the race
condition completely, but due to the way the scan code is
structured it makes the particular problem Pavel discovered
(race while changing channel at the same time as transmitting
frames) go away. To fix it completely, more work especially
with locking configuration is needed.
Bisected-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-05-07 20:23:01 +08:00
|
|
|
if (scan_chan)
|
2008-10-09 18:18:51 +08:00
|
|
|
power = chan->max_power;
|
2008-01-25 02:38:38 +08:00
|
|
|
else
|
2009-01-09 20:44:15 +08:00
|
|
|
power = local->power_constr_level ?
|
|
|
|
|
(chan->max_power - local->power_constr_level) :
|
|
|
|
|
chan->max_power;
|
|
|
|
|
|
2009-04-07 21:22:28 +08:00
|
|
|
if (local->user_power_level >= 0)
|
2009-01-09 20:44:15 +08:00
|
|
|
power = min(power, local->user_power_level);
|
|
|
|
|
|
2008-10-09 18:18:51 +08:00
|
|
|
if (local->hw.conf.power_level != power) {
|
|
|
|
|
changed |= IEEE80211_CONF_CHANGE_POWER;
|
|
|
|
|
local->hw.conf.power_level = power;
|
|
|
|
|
}
|
2007-07-27 21:43:23 +08:00
|
|
|
|
2008-10-09 18:18:51 +08:00
|
|
|
if (changed && local->open_count) {
|
2009-04-24 00:52:52 +08:00
|
|
|
ret = drv_config(local, changed);
|
2008-10-07 18:04:34 +08:00
|
|
|
/*
|
2008-12-05 06:49:08 +08:00
|
|
|
* Goal:
|
2008-10-07 18:04:34 +08:00
|
|
|
* HW reconfiguration should never fail, the driver has told
|
|
|
|
|
* us what it can support so it should live up to that promise.
|
2008-12-05 06:49:08 +08:00
|
|
|
*
|
|
|
|
|
* Current status:
|
|
|
|
|
* rfkill is not integrated with mac80211 and a
|
|
|
|
|
* configuration command can thus fail if hardware rfkill
|
|
|
|
|
* is enabled
|
|
|
|
|
*
|
|
|
|
|
* FIXME: integrate rfkill with mac80211 and then add this
|
|
|
|
|
* WARN_ON() back
|
|
|
|
|
*
|
2008-10-07 18:04:34 +08:00
|
|
|
*/
|
2008-12-05 06:49:08 +08:00
|
|
|
/* WARN_ON(ret); */
|
2008-10-07 18:04:34 +08:00
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-07-27 21:43:23 +08:00
|
|
|
return ret;
|
|
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-12-28 21:32:58 +08:00
|
|
|
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
|
|
|
|
|
u32 changed)
|
2007-07-27 21:43:24 +08:00
|
|
|
{
|
2007-12-28 21:32:58 +08:00
|
|
|
struct ieee80211_local *local = sdata->local;
|
2009-05-14 19:10:14 +08:00
|
|
|
static const u8 zero[ETH_ALEN] = { 0 };
|
2007-12-28 21:32:58 +08:00
|
|
|
|
|
|
|
|
if (!changed)
|
|
|
|
|
return;
|
|
|
|
|
|
2009-05-14 19:10:14 +08:00
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
|
|
|
/*
|
|
|
|
|
* While not associated, claim a BSSID of all-zeroes
|
|
|
|
|
* so that drivers don't do any weird things with the
|
|
|
|
|
* BSSID at that time.
|
|
|
|
|
*/
|
|
|
|
|
if (sdata->vif.bss_conf.assoc)
|
|
|
|
|
sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
|
|
|
|
|
else
|
|
|
|
|
sdata->vif.bss_conf.bssid = zero;
|
|
|
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
|
2009-04-23 22:13:26 +08:00
|
|
|
sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
|
|
|
|
|
else if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
|
|
|
sdata->vif.bss_conf.bssid = sdata->dev->dev_addr;
|
|
|
|
|
else if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
|
|
|
sdata->vif.bss_conf.bssid = zero;
|
|
|
|
|
} else {
|
|
|
|
|
WARN_ON(1);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (sdata->vif.type) {
|
|
|
|
|
case NL80211_IFTYPE_AP:
|
|
|
|
|
case NL80211_IFTYPE_ADHOC:
|
|
|
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
/* do not warn to simplify caller in scan.c */
|
|
|
|
|
changed &= ~BSS_CHANGED_BEACON_ENABLED;
|
|
|
|
|
if (WARN_ON(changed & BSS_CHANGED_BEACON))
|
|
|
|
|
return;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (changed & BSS_CHANGED_BEACON_ENABLED) {
|
2009-07-29 16:13:03 +08:00
|
|
|
if (local->quiescing || !netif_running(sdata->dev) ||
|
|
|
|
|
test_bit(SCAN_SW_SCANNING, &local->scanning)) {
|
2009-04-23 22:13:26 +08:00
|
|
|
sdata->vif.bss_conf.enable_beacon = false;
|
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* Beacon should be enabled, but AP mode must
|
|
|
|
|
* check whether there is a beacon configured.
|
|
|
|
|
*/
|
|
|
|
|
switch (sdata->vif.type) {
|
|
|
|
|
case NL80211_IFTYPE_AP:
|
|
|
|
|
sdata->vif.bss_conf.enable_beacon =
|
|
|
|
|
!!rcu_dereference(sdata->u.ap.beacon);
|
|
|
|
|
break;
|
|
|
|
|
case NL80211_IFTYPE_ADHOC:
|
|
|
|
|
sdata->vif.bss_conf.enable_beacon =
|
|
|
|
|
!!rcu_dereference(sdata->u.ibss.presp);
|
|
|
|
|
break;
|
|
|
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
|
|
|
sdata->vif.bss_conf.enable_beacon = true;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
/* not reached */
|
|
|
|
|
WARN_ON(1);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2009-04-24 00:52:52 +08:00
|
|
|
drv_bss_info_changed(local, &sdata->vif,
|
|
|
|
|
&sdata->vif.bss_conf, changed);
|
2007-07-27 21:43:24 +08:00
|
|
|
}
|
|
|
|
|
|
2008-08-03 08:04:37 +08:00
|
|
|
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
|
2007-07-27 21:43:24 +08:00
|
|
|
{
|
2008-10-11 07:51:51 +08:00
|
|
|
sdata->vif.bss_conf.use_cts_prot = false;
|
|
|
|
|
sdata->vif.bss_conf.use_short_preamble = false;
|
|
|
|
|
sdata->vif.bss_conf.use_short_slot = false;
|
2008-10-08 16:59:33 +08:00
|
|
|
return BSS_CHANGED_ERP_CTS_PROT |
|
|
|
|
|
BSS_CHANGED_ERP_PREAMBLE |
|
|
|
|
|
BSS_CHANGED_ERP_SLOT;
|
2007-07-27 21:43:24 +08:00
|
|
|
}
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
|
2008-05-15 18:55:29 +08:00
|
|
|
struct sk_buff *skb)
|
2007-05-06 02:45:53 +08:00
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
2008-05-15 18:55:29 +08:00
|
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
2007-05-06 02:45:53 +08:00
|
|
|
int tmp;
|
|
|
|
|
|
|
|
|
|
skb->pkt_type = IEEE80211_TX_STATUS_MSG;
|
2008-05-15 18:55:29 +08:00
|
|
|
skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
|
2007-05-06 02:45:53 +08:00
|
|
|
&local->skb_queue : &local->skb_queue_unreliable, skb);
|
|
|
|
|
tmp = skb_queue_len(&local->skb_queue) +
|
|
|
|
|
skb_queue_len(&local->skb_queue_unreliable);
|
|
|
|
|
while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
|
|
|
|
|
(skb = skb_dequeue(&local->skb_queue_unreliable))) {
|
|
|
|
|
dev_kfree_skb_irq(skb);
|
|
|
|
|
tmp--;
|
|
|
|
|
I802_DEBUG_INC(local->tx_status_drop);
|
|
|
|
|
}
|
|
|
|
|
tasklet_schedule(&local->tasklet);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
|
|
|
|
|
|
|
|
|
|
static void ieee80211_tasklet_handler(unsigned long data)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = (struct ieee80211_local *) data;
|
|
|
|
|
struct sk_buff *skb;
|
2008-01-28 20:07:17 +08:00
|
|
|
struct ieee80211_ra_tid *ra_tid;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
|
|
|
|
while ((skb = skb_dequeue(&local->skb_queue)) ||
|
|
|
|
|
(skb = skb_dequeue(&local->skb_queue_unreliable))) {
|
|
|
|
|
switch (skb->pkt_type) {
|
|
|
|
|
case IEEE80211_RX_MSG:
|
2007-12-19 08:31:27 +08:00
|
|
|
/* Clear skb->pkt_type in order to not confuse kernel
|
2007-05-06 02:45:53 +08:00
|
|
|
* netstack. */
|
|
|
|
|
skb->pkt_type = 0;
|
2009-06-17 19:13:00 +08:00
|
|
|
ieee80211_rx(local_to_hw(local), skb);
|
2007-05-06 02:45:53 +08:00
|
|
|
break;
|
|
|
|
|
case IEEE80211_TX_STATUS_MSG:
|
|
|
|
|
skb->pkt_type = 0;
|
2008-05-15 18:55:29 +08:00
|
|
|
ieee80211_tx_status(local_to_hw(local), skb);
|
2007-05-06 02:45:53 +08:00
|
|
|
break;
|
2008-01-28 20:07:17 +08:00
|
|
|
case IEEE80211_DELBA_MSG:
|
|
|
|
|
ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
|
|
|
|
|
ieee80211_stop_tx_ba_cb(local_to_hw(local),
|
|
|
|
|
ra_tid->ra, ra_tid->tid);
|
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
break;
|
|
|
|
|
case IEEE80211_ADDBA_MSG:
|
|
|
|
|
ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
|
|
|
|
|
ieee80211_start_tx_ba_cb(local_to_hw(local),
|
|
|
|
|
ra_tid->ra, ra_tid->tid);
|
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
break ;
|
2008-06-30 21:10:46 +08:00
|
|
|
default:
|
2008-12-18 04:26:59 +08:00
|
|
|
WARN(1, "mac80211: Packet is of unknown type %d\n",
|
|
|
|
|
skb->pkt_type);
|
2007-05-06 02:45:53 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2008-02-21 06:59:33 +08:00
|
|
|
static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
|
|
|
|
|
struct sta_info *sta,
|
2008-05-15 18:55:29 +08:00
|
|
|
struct sk_buff *skb)
|
2008-02-21 06:59:33 +08:00
|
|
|
{
|
2009-06-08 03:58:37 +08:00
|
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
|
|
|
|
2009-07-28 02:28:40 +08:00
|
|
|
/*
|
|
|
|
|
* XXX: This is temporary!
|
|
|
|
|
*
|
|
|
|
|
* The problem here is that when we get here, the driver will
|
|
|
|
|
* quite likely have pretty much overwritten info->control by
|
|
|
|
|
* using info->driver_data or info->rate_driver_data. Thus,
|
|
|
|
|
* when passing out the frame to the driver again, we would be
|
|
|
|
|
* passing completely bogus data since the driver would then
|
|
|
|
|
* expect a properly filled info->control. In mac80211 itself
|
|
|
|
|
* the same problem occurs, since we need info->control.vif
|
|
|
|
|
* internally.
|
|
|
|
|
*
|
|
|
|
|
* To fix this, we should send the frame through TX processing
|
|
|
|
|
* again. However, it's not that simple, since the frame will
|
|
|
|
|
* have been software-encrypted (if applicable) already, and
|
|
|
|
|
* encrypting it again doesn't do much good. So to properly do
|
|
|
|
|
* that, we not only have to skip the actual 'raw' encryption
|
|
|
|
|
* (key selection etc. still has to be done!) but also the
|
|
|
|
|
* sequence number assignment since that impacts the crypto
|
|
|
|
|
* encapsulation, of course.
|
|
|
|
|
*
|
|
|
|
|
* Hence, for now, fix the bug by just dropping the frame.
|
|
|
|
|
*/
|
|
|
|
|
goto drop;
|
|
|
|
|
|
2008-02-21 06:59:33 +08:00
|
|
|
sta->tx_filtered_count++;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Clear the TX filter mask for this STA when sending the next
|
|
|
|
|
* packet. If the STA went to power save mode, this will happen
|
2008-05-27 22:50:50 +08:00
|
|
|
* when it wakes up for the next time.
|
2008-02-21 06:59:33 +08:00
|
|
|
*/
|
2008-05-03 07:02:02 +08:00
|
|
|
set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
|
2008-02-21 06:59:33 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This code races in the following way:
|
|
|
|
|
*
|
|
|
|
|
* (1) STA sends frame indicating it will go to sleep and does so
|
|
|
|
|
* (2) hardware/firmware adds STA to filter list, passes frame up
|
|
|
|
|
* (3) hardware/firmware processes TX fifo and suppresses a frame
|
|
|
|
|
* (4) we get TX status before having processed the frame and
|
|
|
|
|
* knowing that the STA has gone to sleep.
|
|
|
|
|
*
|
|
|
|
|
* This is actually quite unlikely even when both those events are
|
|
|
|
|
* processed from interrupts coming in quickly after one another or
|
|
|
|
|
* even at the same time because we queue both TX status events and
|
|
|
|
|
* RX frames to be processed by a tasklet and process them in the
|
|
|
|
|
* same order that they were received or TX status last. Hence, there
|
|
|
|
|
* is no race as long as the frame RX is processed before the next TX
|
|
|
|
|
* status, which drivers can ensure, see below.
|
|
|
|
|
*
|
|
|
|
|
* Note that this can only happen if the hardware or firmware can
|
|
|
|
|
* actually add STAs to the filter list, if this is done by the
|
|
|
|
|
* driver in response to set_tim() (which will only reduce the race
|
|
|
|
|
* this whole filtering tries to solve, not completely solve it)
|
|
|
|
|
* this situation cannot happen.
|
|
|
|
|
*
|
|
|
|
|
* To completely solve this race drivers need to make sure that they
|
|
|
|
|
* (a) don't mix the irq-safe/not irq-safe TX status/RX processing
|
|
|
|
|
* functions and
|
|
|
|
|
* (b) always process RX events before TX status events if ordering
|
|
|
|
|
* can be unknown, for example with different interrupt status
|
|
|
|
|
* bits.
|
|
|
|
|
*/
|
2008-05-03 07:02:02 +08:00
|
|
|
if (test_sta_flags(sta, WLAN_STA_PS) &&
|
2008-02-21 06:59:33 +08:00
|
|
|
skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
|
|
|
|
|
skb_queue_tail(&sta->tx_filtered, skb);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2009-06-08 03:58:37 +08:00
|
|
|
if (!test_sta_flags(sta, WLAN_STA_PS) &&
|
|
|
|
|
!(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
|
2008-02-21 06:59:33 +08:00
|
|
|
/* Software retry the packet once */
|
2009-06-08 03:58:37 +08:00
|
|
|
info->flags |= IEEE80211_TX_INTFL_RETRIED;
|
|
|
|
|
ieee80211_add_pending_skb(local, skb);
|
2008-02-21 06:59:33 +08:00
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2009-07-28 02:28:40 +08:00
|
|
|
drop:
|
2008-06-30 21:10:46 +08:00
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
2008-02-21 06:59:33 +08:00
|
|
|
if (net_ratelimit())
|
|
|
|
|
printk(KERN_DEBUG "%s: dropped TX filtered frame, "
|
|
|
|
|
"queue_len=%d PS=%d @%lu\n",
|
|
|
|
|
wiphy_name(local->hw.wiphy),
|
|
|
|
|
skb_queue_len(&sta->tx_filtered),
|
2008-05-03 07:02:02 +08:00
|
|
|
!!test_sta_flags(sta, WLAN_STA_PS), jiffies);
|
2008-06-30 21:10:46 +08:00
|
|
|
#endif
|
2008-02-21 06:59:33 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
}
|
|
|
|
|
|
2008-05-15 18:55:29 +08:00
|
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
|
2007-05-06 02:45:53 +08:00
|
|
|
{
|
|
|
|
|
struct sk_buff *skb2;
|
|
|
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
2008-05-15 18:55:29 +08:00
|
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
2007-05-06 02:45:53 +08:00
|
|
|
u16 frag, type;
|
2008-07-01 19:16:03 +08:00
|
|
|
__le16 fc;
|
2008-09-19 00:14:18 +08:00
|
|
|
struct ieee80211_supported_band *sband;
|
2007-07-11 01:32:08 +08:00
|
|
|
struct ieee80211_tx_status_rtap_hdr *rthdr;
|
|
|
|
|
struct ieee80211_sub_if_data *sdata;
|
2008-02-01 02:48:27 +08:00
|
|
|
struct net_device *prev_dev = NULL;
|
2008-07-01 19:16:03 +08:00
|
|
|
struct sta_info *sta;
|
2008-10-21 18:40:02 +08:00
|
|
|
int retry_count = -1, i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
|
|
|
|
|
/* the HW cannot have attempted that rate */
|
|
|
|
|
if (i >= hw->max_rates) {
|
|
|
|
|
info->status.rates[i].idx = -1;
|
|
|
|
|
info->status.rates[i].count = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
retry_count += info->status.rates[i].count;
|
|
|
|
|
}
|
|
|
|
|
if (retry_count < 0)
|
|
|
|
|
retry_count = 0;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-02-25 23:27:46 +08:00
|
|
|
rcu_read_lock();
|
|
|
|
|
|
2008-10-21 18:40:02 +08:00
|
|
|
sband = local->hw.wiphy->bands[info->band];
|
|
|
|
|
|
2008-09-11 08:03:28 +08:00
|
|
|
sta = sta_info_get(local, hdr->addr1);
|
|
|
|
|
|
|
|
|
|
if (sta) {
|
2008-10-21 18:40:02 +08:00
|
|
|
if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
|
2008-09-11 08:03:28 +08:00
|
|
|
test_sta_flags(sta, WLAN_STA_PS)) {
|
|
|
|
|
/*
|
|
|
|
|
* The STA is in power save mode, so assume
|
|
|
|
|
* that this TX packet failed because of that.
|
|
|
|
|
*/
|
|
|
|
|
ieee80211_handle_filtered_frame(local, sta, skb);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
return;
|
2007-05-06 02:45:53 +08:00
|
|
|
}
|
|
|
|
|
|
2008-09-11 08:03:28 +08:00
|
|
|
fc = hdr->frame_control;
|
|
|
|
|
|
|
|
|
|
if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
|
|
|
|
|
(ieee80211_is_data_qos(fc))) {
|
|
|
|
|
u16 tid, ssn;
|
|
|
|
|
u8 *qc;
|
2008-07-01 19:16:03 +08:00
|
|
|
|
|
|
|
|
qc = ieee80211_get_qos_ctl(hdr);
|
|
|
|
|
tid = qc[0] & 0xf;
|
|
|
|
|
ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
|
|
|
|
|
& IEEE80211_SCTL_SEQ);
|
2008-08-03 08:04:37 +08:00
|
|
|
ieee80211_send_bar(sta->sdata, hdr->addr1,
|
2008-07-01 19:16:03 +08:00
|
|
|
tid, ssn);
|
|
|
|
|
}
|
|
|
|
|
|
2008-09-11 08:03:28 +08:00
|
|
|
if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
|
2008-05-15 18:55:29 +08:00
|
|
|
ieee80211_handle_filtered_frame(local, sta, skb);
|
2008-02-25 23:27:46 +08:00
|
|
|
rcu_read_unlock();
|
2007-05-06 02:45:53 +08:00
|
|
|
return;
|
2008-09-11 08:03:28 +08:00
|
|
|
} else {
|
2008-10-21 18:40:02 +08:00
|
|
|
if (!(info->flags & IEEE80211_TX_STAT_ACK))
|
2008-09-11 08:03:28 +08:00
|
|
|
sta->tx_retry_failed++;
|
2008-10-21 18:40:02 +08:00
|
|
|
sta->tx_retry_count += retry_count;
|
2007-05-06 02:45:53 +08:00
|
|
|
}
|
2008-09-11 08:03:28 +08:00
|
|
|
|
2008-09-19 00:14:18 +08:00
|
|
|
rate_control_tx_status(local, sband, sta, skb);
|
2009-08-18 08:15:55 +08:00
|
|
|
if (ieee80211_vif_is_mesh(&sta->sdata->vif))
|
|
|
|
|
ieee80211s_update_metric(local, sta, skb);
|
2008-09-11 08:03:28 +08:00
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-02-25 23:27:46 +08:00
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
ieee80211_led_tx(local, 0);
|
|
|
|
|
|
|
|
|
|
/* SNMP counters
|
|
|
|
|
* Fragments are passed to low-level drivers as separate skbs, so these
|
|
|
|
|
* are actually fragments, not frames. Update frame counters only for
|
|
|
|
|
* the first fragment of the frame. */
|
|
|
|
|
|
|
|
|
|
frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
|
|
|
|
|
type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
|
|
|
|
|
|
2008-05-15 18:55:29 +08:00
|
|
|
if (info->flags & IEEE80211_TX_STAT_ACK) {
|
2007-05-06 02:45:53 +08:00
|
|
|
if (frag == 0) {
|
|
|
|
|
local->dot11TransmittedFrameCount++;
|
|
|
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
|
|
|
local->dot11MulticastTransmittedFrameCount++;
|
2008-10-21 18:40:02 +08:00
|
|
|
if (retry_count > 0)
|
2007-05-06 02:45:53 +08:00
|
|
|
local->dot11RetryCount++;
|
2008-10-21 18:40:02 +08:00
|
|
|
if (retry_count > 1)
|
2007-05-06 02:45:53 +08:00
|
|
|
local->dot11MultipleRetryCount++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This counter shall be incremented for an acknowledged MPDU
|
|
|
|
|
* with an individual address in the address 1 field or an MPDU
|
|
|
|
|
* with a multicast address in the address 1 field of type Data
|
|
|
|
|
* or Management. */
|
|
|
|
|
if (!is_multicast_ether_addr(hdr->addr1) ||
|
|
|
|
|
type == IEEE80211_FTYPE_DATA ||
|
|
|
|
|
type == IEEE80211_FTYPE_MGMT)
|
|
|
|
|
local->dot11TransmittedFragmentCount++;
|
|
|
|
|
} else {
|
|
|
|
|
if (frag == 0)
|
|
|
|
|
local->dot11FailedCount++;
|
|
|
|
|
}
|
|
|
|
|
|
2007-07-11 01:32:08 +08:00
|
|
|
/* this was a transmitted frame, but now we want to reuse it */
|
|
|
|
|
skb_orphan(skb);
|
|
|
|
|
|
2008-02-01 02:48:27 +08:00
|
|
|
/*
|
|
|
|
|
* This is a bit racy but we can avoid a lot of work
|
|
|
|
|
* with this test...
|
|
|
|
|
*/
|
|
|
|
|
if (!local->monitors && !local->cooked_mntrs) {
|
2007-05-06 02:45:53 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2007-07-11 01:32:08 +08:00
|
|
|
/* send frame to monitor interfaces now */
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-07-11 01:32:08 +08:00
|
|
|
if (skb_headroom(skb) < sizeof(*rthdr)) {
|
|
|
|
|
printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
|
2007-05-06 02:45:53 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2008-04-18 01:21:22 +08:00
|
|
|
rthdr = (struct ieee80211_tx_status_rtap_hdr *)
|
2007-07-11 01:32:08 +08:00
|
|
|
skb_push(skb, sizeof(*rthdr));
|
|
|
|
|
|
|
|
|
|
memset(rthdr, 0, sizeof(*rthdr));
|
|
|
|
|
rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
|
|
|
|
|
rthdr->hdr.it_present =
|
|
|
|
|
cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
|
2008-10-21 18:40:02 +08:00
|
|
|
(1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
|
|
|
|
|
(1 << IEEE80211_RADIOTAP_RATE));
|
2007-07-11 01:32:08 +08:00
|
|
|
|
2008-05-15 18:55:29 +08:00
|
|
|
if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
|
2007-07-11 01:32:08 +08:00
|
|
|
!is_multicast_ether_addr(hdr->addr1))
|
|
|
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
|
|
|
|
|
|
2008-10-21 18:40:02 +08:00
|
|
|
/*
|
|
|
|
|
* XXX: Once radiotap gets the bitmap reset thing the vendor
|
|
|
|
|
* extensions proposal contains, we can actually report
|
|
|
|
|
* the whole set of tries we did.
|
|
|
|
|
*/
|
|
|
|
|
if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
|
|
|
|
|
(info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
|
2007-07-11 01:32:08 +08:00
|
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
|
2008-10-21 18:40:02 +08:00
|
|
|
else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
|
2007-07-11 01:32:08 +08:00
|
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
|
2008-10-21 18:40:02 +08:00
|
|
|
if (info->status.rates[0].idx >= 0 &&
|
|
|
|
|
!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
|
|
|
|
|
rthdr->rate = sband->bitrates[
|
|
|
|
|
info->status.rates[0].idx].bitrate / 5;
|
2007-07-11 01:32:08 +08:00
|
|
|
|
2008-10-21 18:40:02 +08:00
|
|
|
/* for now report the total retry_count */
|
|
|
|
|
rthdr->data_retries = retry_count;
|
2007-07-11 01:32:08 +08:00
|
|
|
|
2008-02-01 02:48:27 +08:00
|
|
|
/* XXX: is this sufficient for BPF? */
|
|
|
|
|
skb_set_mac_header(skb, 0);
|
|
|
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
|
|
|
skb->protocol = htons(ETH_P_802_2);
|
|
|
|
|
memset(skb->cb, 0, sizeof(skb->cb));
|
|
|
|
|
|
2007-09-19 05:29:21 +08:00
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
2008-09-11 06:01:58 +08:00
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
|
2007-07-11 01:32:08 +08:00
|
|
|
if (!netif_running(sdata->dev))
|
|
|
|
|
continue;
|
2008-02-01 02:48:27 +08:00
|
|
|
|
|
|
|
|
if (prev_dev) {
|
2007-09-19 05:29:21 +08:00
|
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
2008-02-01 02:48:27 +08:00
|
|
|
if (skb2) {
|
|
|
|
|
skb2->dev = prev_dev;
|
|
|
|
|
netif_rx(skb2);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
prev_dev = sdata->dev;
|
2007-07-11 01:32:08 +08:00
|
|
|
}
|
|
|
|
|
}
|
2008-02-01 02:48:27 +08:00
|
|
|
if (prev_dev) {
|
|
|
|
|
skb->dev = prev_dev;
|
|
|
|
|
netif_rx(skb);
|
|
|
|
|
skb = NULL;
|
|
|
|
|
}
|
2007-09-19 05:29:21 +08:00
|
|
|
rcu_read_unlock();
|
2008-02-01 02:48:27 +08:00
|
|
|
dev_kfree_skb(skb);
|
2007-05-06 02:45:53 +08:00
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_tx_status);
|
|
|
|
|
|
2009-04-14 16:09:24 +08:00
|
|
|
static void ieee80211_restart_work(struct work_struct *work)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local =
|
|
|
|
|
container_of(work, struct ieee80211_local, restart_work);
|
|
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
|
ieee80211_reconfig(local);
|
|
|
|
|
rtnl_unlock();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void ieee80211_restart_hw(struct ieee80211_hw *hw)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
|
|
|
|
|
|
/* use this reason, __ieee80211_resume will unblock it */
|
|
|
|
|
ieee80211_stop_queues_by_reason(hw,
|
|
|
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
|
|
|
|
|
|
|
|
|
|
schedule_work(&local->restart_work);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_restart_hw);
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
|
|
|
const struct ieee80211_ops *ops)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local;
|
mac80211: fix aggregation for hardware with ampdu queues
Hardware with AMPDU queues currently has broken aggregation.
This patch fixes it by making all A-MPDUs go over the regular AC queues,
but keeping track of the hardware queues in mac80211. As a first rough
version, it actually stops the AC queue for extended periods of time,
which can be removed by adding buffering internal to mac80211, but is
currently not a huge problem because people rarely use multiple TIDs
that are in the same AC (and iwlwifi currently doesn't operate as AP).
This is a short-term fix, my current medium-term plan, which I hope to
execute soon as well, but am not sure can finish before .30, looks like
this:
1) rework the internal queuing layer in mac80211 that we use for
fragments if the driver stopped queue in the middle of a fragmented
frame to be able to queue more frames at once (rather than just a
single frame with its fragments)
2) instead of stopping the entire AC queue, queue up the frames in a
per-station/per-TID queue during aggregation session initiation,
when the session has come up take all those frames and put them
onto the queue from 1)
3) push the ampdu queue layer abstraction this patch introduces in
mac80211 into the driver, and remove the virtual queue stuff from
mac80211 again
This plan will probably also affect ath9k in that mac80211 queues the
frames instead of passing them down, even when there are no ampdu queues.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-02-12 07:51:53 +08:00
|
|
|
int priv_size, i;
|
2007-05-06 02:45:53 +08:00
|
|
|
struct wiphy *wiphy;
|
|
|
|
|
|
|
|
|
|
/* Ensure 32-byte alignment of our private data and hw private data.
|
|
|
|
|
* We use the wiphy priv data for both our ieee80211_local and for
|
|
|
|
|
* the driver's private data
|
|
|
|
|
*
|
|
|
|
|
* In memory it'll be like this:
|
|
|
|
|
*
|
|
|
|
|
* +-------------------------+
|
|
|
|
|
* | struct wiphy |
|
|
|
|
|
* +-------------------------+
|
|
|
|
|
* | struct ieee80211_local |
|
|
|
|
|
* +-------------------------+
|
|
|
|
|
* | driver's private data |
|
|
|
|
|
* +-------------------------+
|
|
|
|
|
*
|
|
|
|
|
*/
|
2009-05-27 12:42:37 +08:00
|
|
|
priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
|
|
|
|
wiphy = wiphy_new(&mac80211_config_ops, priv_size);
|
|
|
|
|
|
|
|
|
|
if (!wiphy)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
2009-07-14 06:33:36 +08:00
|
|
|
wiphy->netnsok = true;
|
2007-05-06 02:45:53 +08:00
|
|
|
wiphy->privid = mac80211_wiphy_privid;
|
2009-03-31 18:12:05 +08:00
|
|
|
|
2009-02-11 04:26:00 +08:00
|
|
|
/* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
|
|
|
|
|
wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
|
|
|
|
|
sizeof(struct cfg80211_bss);
|
2007-05-06 02:45:53 +08:00
|
|
|
|
|
|
|
|
local = wiphy_priv(wiphy);
|
2009-04-01 17:58:36 +08:00
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
local->hw.wiphy = wiphy;
|
|
|
|
|
|
2009-05-27 12:42:37 +08:00
|
|
|
local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-07-11 01:32:10 +08:00
|
|
|
BUG_ON(!ops->tx);
|
[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>
2007-09-17 13:29:23 +08:00
|
|
|
BUG_ON(!ops->start);
|
|
|
|
|
BUG_ON(!ops->stop);
|
2007-07-11 01:32:10 +08:00
|
|
|
BUG_ON(!ops->config);
|
|
|
|
|
BUG_ON(!ops->add_interface);
|
[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>
2007-09-17 13:29:23 +08:00
|
|
|
BUG_ON(!ops->remove_interface);
|
|
|
|
|
BUG_ON(!ops->configure_filter);
|
2007-05-06 02:45:53 +08:00
|
|
|
local->ops = ops;
|
|
|
|
|
|
2008-10-21 18:40:02 +08:00
|
|
|
/* set up some defaults */
|
|
|
|
|
local->hw.queues = 1;
|
|
|
|
|
local->hw.max_rates = 1;
|
2009-04-21 00:39:05 +08:00
|
|
|
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
|
|
|
|
|
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
|
2009-04-29 06:28:18 +08:00
|
|
|
local->user_power_level = -1;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-09-19 05:29:21 +08:00
|
|
|
INIT_LIST_HEAD(&local->interfaces);
|
2009-01-24 05:54:03 +08:00
|
|
|
mutex_init(&local->iflist_mtx);
|
2009-04-23 22:01:47 +08:00
|
|
|
mutex_init(&local->scan_mtx);
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-04-12 03:40:35 +08:00
|
|
|
spin_lock_init(&local->key_lock);
|
2009-06-17 23:43:56 +08:00
|
|
|
spin_lock_init(&local->filter_lock);
|
2008-12-19 05:35:20 +08:00
|
|
|
spin_lock_init(&local->queue_stop_reason_lock);
|
|
|
|
|
|
2008-09-11 06:01:55 +08:00
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2009-04-14 16:09:24 +08:00
|
|
|
INIT_WORK(&local->restart_work, ieee80211_restart_work);
|
|
|
|
|
|
2009-08-17 22:16:53 +08:00
|
|
|
INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
|
|
|
|
|
|
2008-12-19 05:35:27 +08:00
|
|
|
INIT_WORK(&local->dynamic_ps_enable_work,
|
|
|
|
|
ieee80211_dynamic_ps_enable_work);
|
|
|
|
|
INIT_WORK(&local->dynamic_ps_disable_work,
|
|
|
|
|
ieee80211_dynamic_ps_disable_work);
|
|
|
|
|
setup_timer(&local->dynamic_ps_timer,
|
|
|
|
|
ieee80211_dynamic_ps_timer, (unsigned long) local);
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
sta_info_init(local);
|
|
|
|
|
|
2009-03-24 00:28:37 +08:00
|
|
|
for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
|
|
|
|
|
skb_queue_head_init(&local->pending[i]);
|
2007-05-06 02:45:53 +08:00
|
|
|
tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
|
|
|
|
|
(unsigned long)local);
|
|
|
|
|
tasklet_disable(&local->tx_pending_tasklet);
|
|
|
|
|
|
|
|
|
|
tasklet_init(&local->tasklet,
|
|
|
|
|
ieee80211_tasklet_handler,
|
|
|
|
|
(unsigned long) local);
|
|
|
|
|
tasklet_disable(&local->tasklet);
|
|
|
|
|
|
|
|
|
|
skb_queue_head_init(&local->skb_queue);
|
|
|
|
|
skb_queue_head_init(&local->skb_queue_unreliable);
|
|
|
|
|
|
2009-03-24 00:28:41 +08:00
|
|
|
spin_lock_init(&local->ampdu_lock);
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
return local_to_hw(local);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_alloc_hw);
|
|
|
|
|
|
|
|
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
|
int result;
|
2008-01-25 02:38:38 +08:00
|
|
|
enum ieee80211_band band;
|
2009-04-01 17:58:36 +08:00
|
|
|
int channels, i, j, max_bitrates;
|
2009-03-31 18:12:07 +08:00
|
|
|
bool supp_ht;
|
2009-04-03 02:14:06 +08:00
|
|
|
static const u32 cipher_suites[] = {
|
|
|
|
|
WLAN_CIPHER_SUITE_WEP40,
|
|
|
|
|
WLAN_CIPHER_SUITE_WEP104,
|
|
|
|
|
WLAN_CIPHER_SUITE_TKIP,
|
|
|
|
|
WLAN_CIPHER_SUITE_CCMP,
|
|
|
|
|
|
|
|
|
|
/* keep last -- depends on hw flags! */
|
|
|
|
|
WLAN_CIPHER_SUITE_AES_CMAC
|
|
|
|
|
};
|
2008-01-25 02:38:38 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* generic code guarantees at least one band,
|
|
|
|
|
* set this very early because much code assumes
|
|
|
|
|
* that hw.conf.channel is assigned
|
|
|
|
|
*/
|
2009-02-11 04:25:55 +08:00
|
|
|
channels = 0;
|
2009-04-01 17:58:36 +08:00
|
|
|
max_bitrates = 0;
|
2009-03-31 18:12:07 +08:00
|
|
|
supp_ht = false;
|
2008-01-25 02:38:38 +08:00
|
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
|
|
|
struct ieee80211_supported_band *sband;
|
|
|
|
|
|
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
2009-04-01 17:58:36 +08:00
|
|
|
if (!sband)
|
|
|
|
|
continue;
|
|
|
|
|
if (!local->oper_channel) {
|
2008-01-25 02:38:38 +08:00
|
|
|
/* init channel we're on */
|
|
|
|
|
local->hw.conf.channel =
|
mac80211: fix scan channel race
When a software scan starts, it first sets sw_scanning, but
leaves the scan_channel "unset" (it currently actually gets
initialised to a default). Now, when something else tries
to (re)configure the hardware in the window between these two
events (after sw_scanning = true, but before scan_channel is
set), the current code switches to the (unset!) scan_channel.
This causes trouble, especially when switching bands and
sending frames on the wrong channel.
To work around this, leave scan_channel initialised to NULL
and use it to determine whether or not a switch to a different
channel should occur (and also use the same condition to check
whether to adjust power for scan or not).
Additionally, avoid reconfiguring the hardware completely when
recalculating idle resulted in no changes, this was the problem
that originally led us to discover the race condition in the
first place, which was helpfully bisected by Pavel. This part
of the patch should not be necessary with the other fixes, but
not calling the ieee80211_hw_config function when we know it to
be unnecessary is certainly a correct thing to do.
Unfortunately, this patch cannot and does not fix the race
condition completely, but due to the way the scan code is
structured it makes the particular problem Pavel discovered
(race while changing channel at the same time as transmitting
frames) go away. To fix it completely, more work especially
with locking configuration is needed.
Bisected-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-05-07 20:23:01 +08:00
|
|
|
local->oper_channel = &sband->channels[0];
|
|
|
|
|
local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
|
2008-01-25 02:38:38 +08:00
|
|
|
}
|
2009-04-01 17:58:36 +08:00
|
|
|
channels += sband->n_channels;
|
|
|
|
|
|
|
|
|
|
if (max_bitrates < sband->n_bitrates)
|
|
|
|
|
max_bitrates = sband->n_bitrates;
|
2009-03-31 18:12:07 +08:00
|
|
|
supp_ht = supp_ht || sband->ht_cap.ht_supported;
|
2008-01-25 02:38:38 +08:00
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2009-08-07 23:54:07 +08:00
|
|
|
local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
|
|
|
|
|
sizeof(void *) * channels, GFP_KERNEL);
|
|
|
|
|
if (!local->int_scan_req)
|
2009-02-11 04:25:55 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
|
|
2008-08-30 07:26:43 +08:00
|
|
|
/* if low-level driver supports AP, we also support VLAN */
|
|
|
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
|
|
|
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
|
|
|
|
|
|
|
|
|
|
/* mac80211 always supports monitor */
|
|
|
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
|
|
|
|
|
2009-02-19 01:45:06 +08:00
|
|
|
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
|
|
|
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
|
|
|
|
|
else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
|
|
|
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
|
|
|
|
|
|
2009-04-01 17:58:36 +08:00
|
|
|
/*
|
|
|
|
|
* Calculate scan IE length -- we need this to alloc
|
|
|
|
|
* memory and to subtract from the driver limit. It
|
|
|
|
|
* includes the (extended) supported rates and HT
|
|
|
|
|
* information -- SSID is the driver's responsibility.
|
|
|
|
|
*/
|
|
|
|
|
local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
|
2009-03-31 18:12:07 +08:00
|
|
|
if (supp_ht)
|
|
|
|
|
local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
|
2009-04-01 17:58:36 +08:00
|
|
|
|
|
|
|
|
if (!local->ops->hw_scan) {
|
|
|
|
|
/* For hw_scan, driver needs to set these up. */
|
|
|
|
|
local->hw.wiphy->max_scan_ssids = 4;
|
|
|
|
|
local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If the driver supports any scan IEs, then assume the
|
|
|
|
|
* limit includes the IEs mac80211 will add, otherwise
|
|
|
|
|
* leave it at zero and let the driver sort it out; we
|
|
|
|
|
* still pass our IEs to the driver but userspace will
|
|
|
|
|
* not be allowed to in that case.
|
|
|
|
|
*/
|
|
|
|
|
if (local->hw.wiphy->max_scan_ie_len)
|
|
|
|
|
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
|
|
|
|
|
|
2009-04-03 02:14:06 +08:00
|
|
|
local->hw.wiphy->cipher_suites = cipher_suites;
|
|
|
|
|
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
|
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
|
|
|
|
|
local->hw.wiphy->n_cipher_suites--;
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
result = wiphy_register(local->hw.wiphy);
|
|
|
|
|
if (result < 0)
|
2009-02-11 04:25:55 +08:00
|
|
|
goto fail_wiphy_register;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-05-17 06:57:14 +08:00
|
|
|
/*
|
|
|
|
|
* We use the number of queues for feature tests (QoS, HT) internally
|
|
|
|
|
* so restrict them appropriately.
|
|
|
|
|
*/
|
|
|
|
|
if (hw->queues > IEEE80211_MAX_QUEUES)
|
|
|
|
|
hw->queues = IEEE80211_MAX_QUEUES;
|
|
|
|
|
|
2009-07-30 08:08:07 +08:00
|
|
|
local->workqueue =
|
2009-01-24 12:09:35 +08:00
|
|
|
create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
|
2009-07-30 08:08:07 +08:00
|
|
|
if (!local->workqueue) {
|
2007-05-06 02:45:53 +08:00
|
|
|
result = -ENOMEM;
|
|
|
|
|
goto fail_workqueue;
|
|
|
|
|
}
|
|
|
|
|
|
2007-07-11 01:32:08 +08:00
|
|
|
/*
|
|
|
|
|
* The hardware needs headroom for sending the frame,
|
|
|
|
|
* and we need some headroom for passing the frame to monitor
|
|
|
|
|
* interfaces, but never both at the same time.
|
|
|
|
|
*/
|
2007-07-18 23:10:44 +08:00
|
|
|
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
|
|
|
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
2007-07-11 01:32:08 +08:00
|
|
|
|
2007-05-06 02:46:38 +08:00
|
|
|
debugfs_hw_add(local);
|
|
|
|
|
|
2008-07-18 13:53:00 +08:00
|
|
|
if (local->hw.max_listen_interval == 0)
|
|
|
|
|
local->hw.max_listen_interval = 1;
|
|
|
|
|
|
|
|
|
|
local->hw.conf.listen_interval = local->hw.max_listen_interval;
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
result = sta_info_start(local);
|
|
|
|
|
if (result < 0)
|
|
|
|
|
goto fail_sta_info;
|
|
|
|
|
|
2009-04-29 18:41:24 +08:00
|
|
|
result = ieee80211_wep_init(local);
|
|
|
|
|
if (result < 0) {
|
|
|
|
|
printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
|
|
|
|
|
wiphy_name(local->hw.wiphy), result);
|
|
|
|
|
goto fail_wep;
|
|
|
|
|
}
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
rtnl_lock();
|
|
|
|
|
|
2007-10-28 21:51:05 +08:00
|
|
|
result = ieee80211_init_rate_ctrl_alg(local,
|
|
|
|
|
hw->rate_control_algorithm);
|
2007-05-06 02:45:53 +08:00
|
|
|
if (result < 0) {
|
|
|
|
|
printk(KERN_DEBUG "%s: Failed to initialize rate control "
|
2007-09-19 05:29:20 +08:00
|
|
|
"algorithm\n", wiphy_name(local->hw.wiphy));
|
2007-05-06 02:45:53 +08:00
|
|
|
goto fail_rate;
|
|
|
|
|
}
|
|
|
|
|
|
2008-12-09 07:10:30 +08:00
|
|
|
/* add one default STA interface if supported */
|
|
|
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
|
|
|
|
|
result = ieee80211_if_add(local, "wlan%d", NULL,
|
|
|
|
|
NL80211_IFTYPE_STATION, NULL);
|
|
|
|
|
if (result)
|
|
|
|
|
printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
|
|
|
|
|
wiphy_name(local->hw.wiphy));
|
|
|
|
|
}
|
2007-05-06 02:45:53 +08:00
|
|
|
|
|
|
|
|
rtnl_unlock();
|
|
|
|
|
|
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
|
|
2009-02-11 04:25:55 +08:00
|
|
|
/* alloc internal scan request */
|
|
|
|
|
i = 0;
|
2009-08-07 23:54:07 +08:00
|
|
|
local->int_scan_req->ssids = &local->scan_ssid;
|
|
|
|
|
local->int_scan_req->n_ssids = 1;
|
2009-02-11 04:25:55 +08:00
|
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
|
|
|
if (!hw->wiphy->bands[band])
|
|
|
|
|
continue;
|
|
|
|
|
for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
|
2009-08-07 23:54:07 +08:00
|
|
|
local->int_scan_req->channels[i] =
|
2009-02-11 04:25:55 +08:00
|
|
|
&hw->wiphy->bands[band]->channels[j];
|
|
|
|
|
i++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2009-04-16 19:17:25 +08:00
|
|
|
local->network_latency_notifier.notifier_call =
|
|
|
|
|
ieee80211_max_network_latency;
|
|
|
|
|
result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
|
|
|
|
|
&local->network_latency_notifier);
|
|
|
|
|
|
|
|
|
|
if (result) {
|
|
|
|
|
rtnl_lock();
|
|
|
|
|
goto fail_pm_qos;
|
|
|
|
|
}
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
return 0;
|
|
|
|
|
|
2009-04-16 19:17:25 +08:00
|
|
|
fail_pm_qos:
|
|
|
|
|
ieee80211_led_exit(local);
|
|
|
|
|
ieee80211_remove_interfaces(local);
|
|
|
|
|
fail_rate:
|
2007-05-06 02:45:53 +08:00
|
|
|
rtnl_unlock();
|
2009-04-29 18:41:24 +08:00
|
|
|
ieee80211_wep_free(local);
|
2009-04-30 11:30:35 +08:00
|
|
|
fail_wep:
|
2007-05-06 02:45:53 +08:00
|
|
|
sta_info_stop(local);
|
2009-04-16 19:17:25 +08:00
|
|
|
fail_sta_info:
|
2007-05-06 02:46:38 +08:00
|
|
|
debugfs_hw_del(local);
|
2009-07-30 08:08:07 +08:00
|
|
|
destroy_workqueue(local->workqueue);
|
2009-04-16 19:17:25 +08:00
|
|
|
fail_workqueue:
|
2007-05-06 02:45:53 +08:00
|
|
|
wiphy_unregister(local->hw.wiphy);
|
2009-04-16 19:17:25 +08:00
|
|
|
fail_wiphy_register:
|
2009-08-07 23:54:07 +08:00
|
|
|
kfree(local->int_scan_req->channels);
|
2007-05-06 02:45:53 +08:00
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_register_hw);
|
|
|
|
|
|
|
|
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
|
|
|
|
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
|
|
|
tasklet_kill(&local->tasklet);
|
|
|
|
|
|
2009-04-16 19:17:25 +08:00
|
|
|
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
|
|
|
|
|
&local->network_latency_notifier);
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
rtnl_lock();
|
|
|
|
|
|
2007-09-19 05:29:21 +08:00
|
|
|
/*
|
|
|
|
|
* At this point, interface list manipulations are fine
|
|
|
|
|
* because the driver cannot be handing us frames any
|
|
|
|
|
* more and the tasklet is killed.
|
|
|
|
|
*/
|
2008-07-09 20:40:35 +08:00
|
|
|
ieee80211_remove_interfaces(local);
|
2007-09-26 20:27:23 +08:00
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
rtnl_unlock();
|
|
|
|
|
|
2009-08-17 22:16:53 +08:00
|
|
|
cancel_work_sync(&local->reconfig_filter);
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
ieee80211_clear_tx_pending(local);
|
|
|
|
|
sta_info_stop(local);
|
|
|
|
|
rate_control_deinitialize(local);
|
2007-05-06 02:46:38 +08:00
|
|
|
debugfs_hw_del(local);
|
2007-05-06 02:45:53 +08:00
|
|
|
|
|
|
|
|
if (skb_queue_len(&local->skb_queue)
|
|
|
|
|
|| skb_queue_len(&local->skb_queue_unreliable))
|
|
|
|
|
printk(KERN_WARNING "%s: skb_queue not empty\n",
|
2007-09-19 05:29:20 +08:00
|
|
|
wiphy_name(local->hw.wiphy));
|
2007-05-06 02:45:53 +08:00
|
|
|
skb_queue_purge(&local->skb_queue);
|
|
|
|
|
skb_queue_purge(&local->skb_queue_unreliable);
|
|
|
|
|
|
2009-07-30 08:08:07 +08:00
|
|
|
destroy_workqueue(local->workqueue);
|
2007-05-06 02:45:53 +08:00
|
|
|
wiphy_unregister(local->hw.wiphy);
|
|
|
|
|
ieee80211_wep_free(local);
|
|
|
|
|
ieee80211_led_exit(local);
|
2009-08-07 23:54:07 +08:00
|
|
|
kfree(local->int_scan_req);
|
2007-05-06 02:45:53 +08:00
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
|
|
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
|
|
|
{
|
|
|
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
|
|
2009-01-24 05:54:03 +08:00
|
|
|
mutex_destroy(&local->iflist_mtx);
|
2009-04-23 22:01:47 +08:00
|
|
|
mutex_destroy(&local->scan_mtx);
|
2009-01-24 05:54:03 +08:00
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
wiphy_free(local->hw.wiphy);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(ieee80211_free_hw);
|
|
|
|
|
|
|
|
|
|
static int __init ieee80211_init(void)
|
|
|
|
|
{
|
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
int ret;
|
|
|
|
|
|
2008-05-15 18:55:29 +08:00
|
|
|
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
|
|
|
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
|
2008-10-07 18:04:32 +08:00
|
|
|
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2008-10-06 00:07:45 +08:00
|
|
|
ret = rc80211_minstrel_init();
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
|
2008-01-02 22:17:03 +08:00
|
|
|
ret = rc80211_pid_init();
|
2007-12-19 08:25:57 +08:00
|
|
|
if (ret)
|
2008-07-15 18:34:57 +08:00
|
|
|
return ret;
|
2007-05-06 02:45:53 +08:00
|
|
|
|
2007-05-06 02:46:38 +08:00
|
|
|
ieee80211_debugfs_netdev_init();
|
|
|
|
|
|
2007-05-06 02:45:53 +08:00
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
|
|
|
{
|
2008-01-02 22:17:03 +08:00
|
|
|
rc80211_pid_exit();
|
2008-10-06 00:07:45 +08:00
|
|
|
rc80211_minstrel_exit();
|
2007-10-28 21:17:44 +08:00
|
|
|
|
2008-04-08 23:56:52 +08:00
|
|
|
/*
|
|
|
|
|
* For key todo, it'll be empty by now but the work
|
|
|
|
|
* might still be scheduled.
|
|
|
|
|
*/
|
|
|
|
|
flush_scheduled_work();
|
|
|
|
|
|
2008-02-23 22:17:18 +08:00
|
|
|
if (mesh_allocated)
|
|
|
|
|
ieee80211s_stop();
|
2008-02-23 22:17:19 +08:00
|
|
|
|
2007-05-06 02:46:38 +08:00
|
|
|
ieee80211_debugfs_netdev_exit();
|
2007-05-06 02:45:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-09-11 18:50:32 +08:00
|
|
|
subsys_initcall(ieee80211_init);
|
2007-05-06 02:45:53 +08:00
|
|
|
module_exit(ieee80211_exit);
|
|
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
|
|
|
MODULE_LICENSE("GPL");
|
