linux/net/mac80211/util.c

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/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* utilities for mac80211
*/
#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
[NET]: Make the device list and device lookups per namespace. This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-17 18:56:21 +00:00
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
#include "led.h"
#include "wep.h"
/* privid for wiphys to determine whether they belong to us or not */
void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
struct ieee80211_local *local;
BUG_ON(!wiphy);
local = wiphy_priv(wiphy);
return &local->hw;
}
EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
enum nl80211_iftype type)
{
__le16 fc = hdr->frame_control;
/* drop ACK/CTS frames and incorrect hdr len (ctrl) */
if (len < 16)
return NULL;
if (ieee80211_is_data(fc)) {
if (len < 24) /* drop incorrect hdr len (data) */
return NULL;
if (ieee80211_has_a4(fc))
return NULL;
if (ieee80211_has_tods(fc))
return hdr->addr1;
if (ieee80211_has_fromds(fc))
return hdr->addr2;
return hdr->addr3;
}
if (ieee80211_is_mgmt(fc)) {
if (len < 24) /* drop incorrect hdr len (mgmt) */
return NULL;
return hdr->addr3;
}
if (ieee80211_is_ctl(fc)) {
if(ieee80211_is_pspoll(fc))
return hdr->addr1;
if (ieee80211_is_back_req(fc)) {
switch (type) {
case NL80211_IFTYPE_STATION:
return hdr->addr2;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
return hdr->addr1;
default:
break; /* fall through to the return */
}
}
}
return NULL;
}
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
struct ieee80211_hdr *hdr;
do {
hdr = (struct ieee80211_hdr *) skb->data;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
} while ((skb = skb->next));
}
int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
int rate, int erp, int short_preamble)
{
int dur;
/* calculate duration (in microseconds, rounded up to next higher
* integer if it includes a fractional microsecond) to send frame of
* len bytes (does not include FCS) at the given rate. Duration will
* also include SIFS.
*
* rate is in 100 kbps, so divident is multiplied by 10 in the
* DIV_ROUND_UP() operations.
*/
if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
/*
* OFDM:
*
* N_DBPS = DATARATE x 4
* N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
* (16 = SIGNAL time, 6 = tail bits)
* TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
*
* T_SYM = 4 usec
* 802.11a - 17.5.2: aSIFSTime = 16 usec
* 802.11g - 19.8.4: aSIFSTime = 10 usec +
* signal ext = 6 usec
*/
dur = 16; /* SIFS + signal ext */
dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
4 * rate); /* T_SYM x N_SYM */
} else {
/*
* 802.11b or 802.11g with 802.11b compatibility:
* 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
* Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
*
* 802.11 (DS): 15.3.3, 802.11b: 18.3.4
* aSIFSTime = 10 usec
* aPreambleLength = 144 usec or 72 usec with short preamble
* aPLCPHeaderLength = 48 usec or 24 usec with short preamble
*/
dur = 10; /* aSIFSTime = 10 usec */
dur += short_preamble ? (72 + 24) : (144 + 48);
dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
}
return dur;
}
/* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
size_t frame_len,
struct ieee80211_rate *rate)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
u16 dur;
int erp;
bool short_preamble = false;
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
short_preamble);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, size_t frame_len,
const struct ieee80211_tx_info *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
struct ieee80211_sub_if_data *sdata;
bool short_preamble;
int erp;
u16 dur;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
short_preamble = false;
rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
/* CTS duration */
dur = ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
/* Data frame duration */
dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
erp, short_preamble);
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
size_t frame_len,
const struct ieee80211_tx_info *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
struct ieee80211_sub_if_data *sdata;
bool short_preamble;
int erp;
u16 dur;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
short_preamble = false;
rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
/* Data frame duration */
dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
erp, short_preamble);
if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
}
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);
static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
trace_wake_queue(local, queue, reason);
if (WARN_ON(queue >= hw->queues))
return;
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>
2009-02-11 23:51:53 +00:00
__clear_bit(reason, &local->queue_stop_reasons[queue]);
if (local->queue_stop_reasons[queue] != 0)
/* someone still has this queue stopped */
return;
if (skb_queue_empty(&local->pending[queue])) {
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
continue;
netif_wake_subqueue(sdata->dev, queue);
}
rcu_read_unlock();
} else
tasklet_schedule(&local->tx_pending_tasklet);
}
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>
2009-02-11 23:51:53 +00:00
void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_wake_queue(hw, queue, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
ieee80211_wake_queue_by_reason(hw, queue,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_wake_queue);
static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
trace_stop_queue(local, queue, reason);
if (WARN_ON(queue >= hw->queues))
return;
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>
2009-02-11 23:51:53 +00:00
__set_bit(reason, &local->queue_stop_reasons[queue]);
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list)
netif_stop_subqueue(sdata->dev, queue);
rcu_read_unlock();
}
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>
2009-02-11 23:51:53 +00:00
void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_stop_queue(hw, queue, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
ieee80211_stop_queue_by_reason(hw, queue,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_stop_queue);
void ieee80211_add_pending_skb(struct ieee80211_local *local,
struct sk_buff *skb)
{
struct ieee80211_hw *hw = &local->hw;
unsigned long flags;
int queue = skb_get_queue_mapping(skb);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (WARN_ON(!info->control.vif)) {
kfree_skb(skb);
return;
}
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
__skb_queue_tail(&local->pending[queue], skb);
__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
struct sk_buff_head *skbs,
void (*fn)(void *data), void *data)
{
struct ieee80211_hw *hw = &local->hw;
struct sk_buff *skb;
unsigned long flags;
int queue, ret = 0, i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (i = 0; i < hw->queues; i++)
__ieee80211_stop_queue(hw, i,
IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
while ((skb = skb_dequeue(skbs))) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (WARN_ON(!info->control.vif)) {
kfree_skb(skb);
continue;
}
ret++;
queue = skb_get_queue_mapping(skb);
__skb_queue_tail(&local->pending[queue], skb);
}
if (fn)
fn(data);
for (i = 0; i < hw->queues; i++)
__ieee80211_wake_queue(hw, i,
IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
return ret;
}
int ieee80211_add_pending_skbs(struct ieee80211_local *local,
struct sk_buff_head *skbs)
{
return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
}
void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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>
2009-02-11 23:51:53 +00:00
for (i = 0; i < hw->queues; i++)
__ieee80211_stop_queue(hw, i, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
ieee80211_stop_queues_by_reason(hw,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_stop_queues);
int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int ret;
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>
2009-02-11 23:51:53 +00:00
if (WARN_ON(queue >= hw->queues))
return true;
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>
2009-02-11 23:51:53 +00:00
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
ret = !!local->queue_stop_reasons[queue];
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
return ret;
}
EXPORT_SYMBOL(ieee80211_queue_stopped);
void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (i = 0; i < hw->queues; i++)
__ieee80211_wake_queue(hw, i, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_wake_queues);
void ieee80211_iterate_active_interfaces(
struct ieee80211_hw *hw,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_AP_VLAN:
continue;
default:
break;
}
if (ieee80211_sdata_running(sdata))
iterator(data, sdata->vif.addr,
&sdata->vif);
}
mutex_unlock(&local->iflist_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
void ieee80211_iterate_active_interfaces_atomic(
struct ieee80211_hw *hw,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_AP_VLAN:
continue;
default:
break;
}
if (ieee80211_sdata_running(sdata))
iterator(data, sdata->vif.addr,
&sdata->vif);
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
/*
* Nothing should have been stuffed into the workqueue during
* the suspend->resume cycle. If this WARN is seen then there
* is a bug with either the driver suspend or something in
* mac80211 stuffing into the workqueue which we haven't yet
* cleared during mac80211's suspend cycle.
*/
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
{
if (WARN(local->suspended && !local->resuming,
"queueing ieee80211 work while going to suspend\n"))
return false;
return true;
}
void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
{
struct ieee80211_local *local = hw_to_local(hw);
if (!ieee80211_can_queue_work(local))
return;
queue_work(local->workqueue, work);
}
EXPORT_SYMBOL(ieee80211_queue_work);
void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
struct delayed_work *dwork,
unsigned long delay)
{
struct ieee80211_local *local = hw_to_local(hw);
if (!ieee80211_can_queue_work(local))
return;
queue_delayed_work(local->workqueue, dwork, delay);
}
EXPORT_SYMBOL(ieee80211_queue_delayed_work);
void ieee802_11_parse_elems(u8 *start, size_t len,
struct ieee802_11_elems *elems)
{
ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
}
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_tx_queue_params qparam;
int queue;
bool use_11b;
int aCWmin, aCWmax;
if (!local->ops->conf_tx)
return;
memset(&qparam, 0, sizeof(qparam));
use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
/* Set defaults according to 802.11-2007 Table 7-37 */
aCWmax = 1023;
if (use_11b)
aCWmin = 31;
else
aCWmin = 15;
switch (queue) {
case 3: /* AC_BK */
qparam.cw_max = aCWmax;
qparam.cw_min = aCWmin;
qparam.txop = 0;
qparam.aifs = 7;
break;
default: /* never happens but let's not leave undefined */
case 2: /* AC_BE */
qparam.cw_max = aCWmax;
qparam.cw_min = aCWmin;
qparam.txop = 0;
qparam.aifs = 3;
break;
case 1: /* AC_VI */
qparam.cw_max = aCWmin;
qparam.cw_min = (aCWmin + 1) / 2 - 1;
if (use_11b)
qparam.txop = 6016/32;
else
qparam.txop = 3008/32;
qparam.aifs = 2;
break;
case 0: /* AC_VO */
qparam.cw_max = (aCWmin + 1) / 2 - 1;
qparam.cw_min = (aCWmin + 1) / 4 - 1;
if (use_11b)
qparam.txop = 3264/32;
else
qparam.txop = 1504/32;
qparam.aifs = 2;
break;
}
qparam.uapsd = false;
sdata->tx_conf[queue] = qparam;
drv_conf_tx(local, sdata, queue, &qparam);
}
/* after reinitialize QoS TX queues setting to default,
* disable QoS at all */
if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
sdata->vif.bss_conf.qos =
sdata->vif.type != NL80211_IFTYPE_STATION;
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
}
}
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
const size_t supp_rates_len,
const u8 *supp_rates)
{
struct ieee80211_local *local = sdata->local;
int i, have_higher_than_11mbit = 0;
/* cf. IEEE 802.11 9.2.12 */
for (i = 0; i < supp_rates_len; i++)
if ((supp_rates[i] & 0x7f) * 5 > 110)
have_higher_than_11mbit = 1;
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
have_higher_than_11mbit)
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
else
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
ieee80211_set_wmm_default(sdata);
}
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
enum ieee80211_band band)
{
struct ieee80211_supported_band *sband;
struct ieee80211_rate *bitrates;
u32 mandatory_rates;
enum ieee80211_rate_flags mandatory_flag;
int i;
sband = local->hw.wiphy->bands[band];
if (!sband) {
WARN_ON(1);
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
}
if (band == IEEE80211_BAND_2GHZ)
mandatory_flag = IEEE80211_RATE_MANDATORY_B;
else
mandatory_flag = IEEE80211_RATE_MANDATORY_A;
bitrates = sband->bitrates;
mandatory_rates = 0;
for (i = 0; i < sband->n_bitrates; i++)
if (bitrates[i].flags & mandatory_flag)
mandatory_rates |= BIT(i);
return mandatory_rates;
}
void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
u16 transaction, u16 auth_alg,
u8 *extra, size_t extra_len, const u8 *bssid,
const u8 *key, u8 key_len, u8 key_idx)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
int err;
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
sizeof(*mgmt) + 6 + extra_len);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
memset(mgmt, 0, 24 + 6);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_AUTH);
memcpy(mgmt->da, bssid, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, bssid, ETH_ALEN);
mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
mgmt->u.auth.status_code = cpu_to_le16(0);
if (extra)
memcpy(skb_put(skb, extra_len), extra, extra_len);
if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
WARN_ON(err);
}
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
ieee80211_tx_skb(sdata, skb);
}
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
const u8 *ie, size_t ie_len,
enum ieee80211_band band, u32 rate_mask,
u8 channel)
{
struct ieee80211_supported_band *sband;
u8 *pos;
size_t offset = 0, noffset;
int supp_rates_len, i;
u8 rates[32];
int num_rates;
int ext_rates_len;
sband = local->hw.wiphy->bands[band];
pos = buffer;
num_rates = 0;
for (i = 0; i < sband->n_bitrates; i++) {
if ((BIT(i) & rate_mask) == 0)
continue; /* skip rate */
rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
}
supp_rates_len = min_t(int, num_rates, 8);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = supp_rates_len;
memcpy(pos, rates, supp_rates_len);
pos += supp_rates_len;
/* insert "request information" if in custom IEs */
if (ie && ie_len) {
static const u8 before_extrates[] = {
WLAN_EID_SSID,
WLAN_EID_SUPP_RATES,
WLAN_EID_REQUEST,
};
noffset = ieee80211_ie_split(ie, ie_len,
before_extrates,
ARRAY_SIZE(before_extrates),
offset);
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
offset = noffset;
}
ext_rates_len = num_rates - supp_rates_len;
if (ext_rates_len > 0) {
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = ext_rates_len;
memcpy(pos, rates + supp_rates_len, ext_rates_len);
pos += ext_rates_len;
}
if (channel && sband->band == IEEE80211_BAND_2GHZ) {
*pos++ = WLAN_EID_DS_PARAMS;
*pos++ = 1;
*pos++ = channel;
}
/* insert custom IEs that go before HT */
if (ie && ie_len) {
static const u8 before_ht[] = {
WLAN_EID_SSID,
WLAN_EID_SUPP_RATES,
WLAN_EID_REQUEST,
WLAN_EID_EXT_SUPP_RATES,
WLAN_EID_DS_PARAMS,
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
};
noffset = ieee80211_ie_split(ie, ie_len,
before_ht, ARRAY_SIZE(before_ht),
offset);
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
offset = noffset;
}
if (sband->ht_cap.ht_supported) {
u16 cap = sband->ht_cap.cap;
__le16 tmp;
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
tmp = cpu_to_le16(cap);
memcpy(pos, &tmp, sizeof(u16));
pos += sizeof(u16);
*pos++ = sband->ht_cap.ampdu_factor |
(sband->ht_cap.ampdu_density <<
IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
pos += sizeof(sband->ht_cap.mcs);
pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
}
/*
* If adding more here, adjust code in main.c
* that calculates local->scan_ies_len.
*/
/* add any remaining custom IEs */
if (ie && ie_len) {
noffset = ie_len;
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
}
return pos - buffer;
}
struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
u8 *dst, u32 ratemask,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len,
bool directed)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
size_t buf_len;
u8 *buf;
u8 chan;
/* FIXME: come up with a proper value */
buf = kmalloc(200 + ie_len, GFP_KERNEL);
if (!buf)
return NULL;
/*
* Do not send DS Channel parameter for directed probe requests
* in order to maximize the chance that we get a response. Some
* badly-behaved APs don't respond when this parameter is included.
*/
if (directed)
chan = 0;
else
chan = ieee80211_frequency_to_channel(
local->hw.conf.channel->center_freq);
buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
local->hw.conf.channel->band,
ratemask, chan);
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
ssid, ssid_len,
buf, buf_len);
if (dst) {
mgmt = (struct ieee80211_mgmt *) skb->data;
memcpy(mgmt->da, dst, ETH_ALEN);
memcpy(mgmt->bssid, dst, ETH_ALEN);
}
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
kfree(buf);
return skb;
}
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len,
u32 ratemask, bool directed, bool no_cck)
{
struct sk_buff *skb;
skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
ie, ie_len, directed);
if (skb) {
if (no_cck)
IEEE80211_SKB_CB(skb)->flags |=
IEEE80211_TX_CTL_NO_CCK_RATE;
ieee80211_tx_skb(sdata, skb);
}
}
u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
struct ieee802_11_elems *elems,
enum ieee80211_band band)
{
struct ieee80211_supported_band *sband;
struct ieee80211_rate *bitrates;
size_t num_rates;
u32 supp_rates;
int i, j;
sband = local->hw.wiphy->bands[band];
if (!sband) {
WARN_ON(1);
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
}
bitrates = sband->bitrates;
num_rates = sband->n_bitrates;
supp_rates = 0;
for (i = 0; i < elems->supp_rates_len +
elems->ext_supp_rates_len; i++) {
u8 rate = 0;
int own_rate;
if (i < elems->supp_rates_len)
rate = elems->supp_rates[i];
else if (elems->ext_supp_rates)
rate = elems->ext_supp_rates
[i - elems->supp_rates_len];
own_rate = 5 * (rate & 0x7f);
for (j = 0; j < num_rates; j++)
if (bitrates[j].bitrate == own_rate)
supp_rates |= BIT(j);
}
return supp_rates;
}
void ieee80211_stop_device(struct ieee80211_local *local)
{
ieee80211_led_radio(local, false);
ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
cancel_work_sync(&local->reconfig_filter);
flush_workqueue(local->workqueue);
drv_stop(local);
}
int ieee80211_reconfig(struct ieee80211_local *local)
{
struct ieee80211_hw *hw = &local->hw;
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
int res, i;
#ifdef CONFIG_PM
if (local->suspended)
local->resuming = true;
if (local->wowlan) {
local->wowlan = false;
res = drv_resume(local);
if (res < 0) {
local->resuming = false;
return res;
}
if (res == 0)
goto wake_up;
WARN_ON(res > 1);
/*
* res is 1, which means the driver requested
* to go through a regular reset on wakeup.
*/
}
#endif
/* setup fragmentation threshold */
drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
/* setup RTS threshold */
drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
/* reset coverage class */
drv_set_coverage_class(local, hw->wiphy->coverage_class);
/* everything else happens only if HW was up & running */
if (!local->open_count)
goto wake_up;
/*
* Upon resume hardware can sometimes be goofy due to
* various platform / driver / bus issues, so restarting
* the device may at times not work immediately. Propagate
* the error.
*/
res = drv_start(local);
if (res) {
WARN(local->suspended, "Hardware became unavailable "
"upon resume. This could be a software issue "
"prior to suspend or a hardware issue.\n");
return res;
}
ieee80211_led_radio(local, true);
ieee80211_mod_tpt_led_trig(local,
IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
/* add interfaces */
list_for_each_entry(sdata, &local->interfaces, list) {
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
sdata->vif.type != NL80211_IFTYPE_MONITOR &&
ieee80211_sdata_running(sdata))
res = drv_add_interface(local, &sdata->vif);
}
/* add STAs back */
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list) {
if (sta->uploaded) {
sdata = sta->sdata;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
memset(&sta->sta.drv_priv, 0, hw->sta_data_size);
WARN_ON(drv_sta_add(local, sdata, &sta->sta));
}
}
mutex_unlock(&local->sta_mtx);
/* reconfigure tx conf */
list_for_each_entry(sdata, &local->interfaces, list) {
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
sdata->vif.type == NL80211_IFTYPE_MONITOR ||
!ieee80211_sdata_running(sdata))
continue;
for (i = 0; i < hw->queues; i++)
drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]);
}
/* reconfigure hardware */
ieee80211_hw_config(local, ~0);
ieee80211_configure_filter(local);
/* Finally also reconfigure all the BSS information */
list_for_each_entry(sdata, &local->interfaces, list) {
u32 changed;
if (!ieee80211_sdata_running(sdata))
continue;
/* common change flags for all interface types */
changed = BSS_CHANGED_ERP_CTS_PROT |
BSS_CHANGED_ERP_PREAMBLE |
BSS_CHANGED_ERP_SLOT |
BSS_CHANGED_HT |
BSS_CHANGED_BASIC_RATES |
BSS_CHANGED_BEACON_INT |
BSS_CHANGED_BSSID |
BSS_CHANGED_CQM |
BSS_CHANGED_QOS;
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
changed |= BSS_CHANGED_ASSOC;
mac80211: add missing locking in ieee80211_reconfig When suspending an associated system, and then resuming, the station vif is being reconfigured without taking the sdata->u.mgd.mtx lock, which results in the following warning: WARNING: at net/mac80211/mlme.c:101 ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]() Modules linked in: wl12xx_sdio wl12xx firmware_class crc7 mac80211 cfg80211 [last unloaded: crc7] Backtrace: [<c005432c>] (dump_backtrace+0x0/0x118) from [<c0376e28>] (dump_stack+0x20/0x24) r7:00000000 r6:bf12d6ec r5:bf154aac r4:00000065 [<c0376e08>] (dump_stack+0x0/0x24) from [<c0079104>] (warn_slowpath_common+0x5c/0x74) [<c00790a8>] (warn_slowpath_common+0x0/0x74) from [<c0079148>] (warn_slowpath_null+0x2c/0x34) r9:000024ff r8:cd006460 r7:00000001 r6:00000000 r5:00000000 r4:cf1394a0 [<c007911c>] (warn_slowpath_null+0x0/0x34) from [<bf12d6ec>] (ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]) [<bf12d694>] (ieee80211_ap_probereq_get+0x0/0xb8 [mac80211]) from [<bf19cd04>] (wl1271_cmd_build_ap_probe_req+0x30/0xf8 [wl12xx]) r4:cd007440 [<bf19ccd4>] (wl1271_cmd_build_ap_probe_req+0x0/0xf8 [wl12xx]) from [<bf1995f4>] (wl1271_op_bss_info_changed+0x4c4/0x808 [wl12xx]) r5:cd007440 r4:000003b4 [<bf199130>] (wl1271_op_bss_info_changed+0x0/0x808 [wl12xx]) from [<bf122168>] (ieee80211_bss_info_change_notify+0x1a4/0x1f8 [mac80211]) [<bf121fc4>] (ieee80211_bss_info_change_notify+0x0/0x1f8 [mac80211]) from [<bf141e80>] (ieee80211_reconfig+0x4d0/0x668 [mac80211]) r8:cf0eeea4 r7:cd00671c r6:00000000 r5:cd006460 r4:cf1394a0 [<bf1419b0>] (ieee80211_reconfig+0x0/0x668 [mac80211]) from [<bf137dd4>] (ieee80211_resume+0x60/0x70 [mac80211]) [<bf137d74>] (ieee80211_resume+0x0/0x70 [mac80211]) from [<bf0eb930>] (wiphy_resume+0x6c/0x7c [cfg80211]) r5:cd006248 r4:cd006110 [<bf0eb8c4>] (wiphy_resume+0x0/0x7c [cfg80211]) from [<c0241024>] (legacy_resume+0x38/0x70) r7:00000000 r6:00000000 r5:cd006248 r4:cd0062fc [<c0240fec>] (legacy_resume+0x0/0x70) from [<c0241478>] (device_resume+0x168/0x1a0) r8:c04ca8d8 r7:cd00627c r6:00000010 r5:cd006248 r4:cd0062fc [<c0241310>] (device_resume+0x0/0x1a0) from [<c0241600>] (dpm_resume_end+0xf8/0x3bc) r7:00000000 r6:00000005 r5:cd006248 r4:cd0062fc [<c0241508>] (dpm_resume_end+0x0/0x3bc) from [<c00b2a24>] (suspend_devices_and_enter+0x1b0/0x204) [<c00b2874>] (suspend_devices_and_enter+0x0/0x204) from [<c00b2b68>] (enter_state+0xf0/0x148) r7:c037e978 r6:00000003 r5:c043d807 r4:00000000 [<c00b2a78>] (enter_state+0x0/0x148) from [<c00b20a4>] (state_store+0xa4/0xcc) r7:c037e978 r6:00000003 r5:00000003 r4:c043d807 [<c00b2000>] (state_store+0x0/0xcc) from [<c01fc90c>] (kobj_attr_store+0x20/0x24) [<c01fc8ec>] (kobj_attr_store+0x0/0x24) from [<c0157120>] (sysfs_write_file+0x11c/0x150) [<c0157004>] (sysfs_write_file+0x0/0x150) from [<c0100f84>] (vfs_write+0xc0/0x14c) [<c0100ec4>] (vfs_write+0x0/0x14c) from [<c01010e4>] (sys_write+0x4c/0x78) r8:40126000 r7:00000004 r6:cf1a7c80 r5:00000000 r4:00000000 [<c0101098>] (sys_write+0x0/0x78) from [<c00500c0>] (ret_fast_syscall+0x0/0x30) r8:c00502c8 r7:00000004 r6:403525e8 r5:40126000 r4:00000004 Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-08 16:43:19 +00:00
mutex_lock(&sdata->u.mgd.mtx);
ieee80211_bss_info_change_notify(sdata, changed);
mac80211: add missing locking in ieee80211_reconfig When suspending an associated system, and then resuming, the station vif is being reconfigured without taking the sdata->u.mgd.mtx lock, which results in the following warning: WARNING: at net/mac80211/mlme.c:101 ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]() Modules linked in: wl12xx_sdio wl12xx firmware_class crc7 mac80211 cfg80211 [last unloaded: crc7] Backtrace: [<c005432c>] (dump_backtrace+0x0/0x118) from [<c0376e28>] (dump_stack+0x20/0x24) r7:00000000 r6:bf12d6ec r5:bf154aac r4:00000065 [<c0376e08>] (dump_stack+0x0/0x24) from [<c0079104>] (warn_slowpath_common+0x5c/0x74) [<c00790a8>] (warn_slowpath_common+0x0/0x74) from [<c0079148>] (warn_slowpath_null+0x2c/0x34) r9:000024ff r8:cd006460 r7:00000001 r6:00000000 r5:00000000 r4:cf1394a0 [<c007911c>] (warn_slowpath_null+0x0/0x34) from [<bf12d6ec>] (ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]) [<bf12d694>] (ieee80211_ap_probereq_get+0x0/0xb8 [mac80211]) from [<bf19cd04>] (wl1271_cmd_build_ap_probe_req+0x30/0xf8 [wl12xx]) r4:cd007440 [<bf19ccd4>] (wl1271_cmd_build_ap_probe_req+0x0/0xf8 [wl12xx]) from [<bf1995f4>] (wl1271_op_bss_info_changed+0x4c4/0x808 [wl12xx]) r5:cd007440 r4:000003b4 [<bf199130>] (wl1271_op_bss_info_changed+0x0/0x808 [wl12xx]) from [<bf122168>] (ieee80211_bss_info_change_notify+0x1a4/0x1f8 [mac80211]) [<bf121fc4>] (ieee80211_bss_info_change_notify+0x0/0x1f8 [mac80211]) from [<bf141e80>] (ieee80211_reconfig+0x4d0/0x668 [mac80211]) r8:cf0eeea4 r7:cd00671c r6:00000000 r5:cd006460 r4:cf1394a0 [<bf1419b0>] (ieee80211_reconfig+0x0/0x668 [mac80211]) from [<bf137dd4>] (ieee80211_resume+0x60/0x70 [mac80211]) [<bf137d74>] (ieee80211_resume+0x0/0x70 [mac80211]) from [<bf0eb930>] (wiphy_resume+0x6c/0x7c [cfg80211]) r5:cd006248 r4:cd006110 [<bf0eb8c4>] (wiphy_resume+0x0/0x7c [cfg80211]) from [<c0241024>] (legacy_resume+0x38/0x70) r7:00000000 r6:00000000 r5:cd006248 r4:cd0062fc [<c0240fec>] (legacy_resume+0x0/0x70) from [<c0241478>] (device_resume+0x168/0x1a0) r8:c04ca8d8 r7:cd00627c r6:00000010 r5:cd006248 r4:cd0062fc [<c0241310>] (device_resume+0x0/0x1a0) from [<c0241600>] (dpm_resume_end+0xf8/0x3bc) r7:00000000 r6:00000005 r5:cd006248 r4:cd0062fc [<c0241508>] (dpm_resume_end+0x0/0x3bc) from [<c00b2a24>] (suspend_devices_and_enter+0x1b0/0x204) [<c00b2874>] (suspend_devices_and_enter+0x0/0x204) from [<c00b2b68>] (enter_state+0xf0/0x148) r7:c037e978 r6:00000003 r5:c043d807 r4:00000000 [<c00b2a78>] (enter_state+0x0/0x148) from [<c00b20a4>] (state_store+0xa4/0xcc) r7:c037e978 r6:00000003 r5:00000003 r4:c043d807 [<c00b2000>] (state_store+0x0/0xcc) from [<c01fc90c>] (kobj_attr_store+0x20/0x24) [<c01fc8ec>] (kobj_attr_store+0x0/0x24) from [<c0157120>] (sysfs_write_file+0x11c/0x150) [<c0157004>] (sysfs_write_file+0x0/0x150) from [<c0100f84>] (vfs_write+0xc0/0x14c) [<c0100ec4>] (vfs_write+0x0/0x14c) from [<c01010e4>] (sys_write+0x4c/0x78) r8:40126000 r7:00000004 r6:cf1a7c80 r5:00000000 r4:00000000 [<c0101098>] (sys_write+0x0/0x78) from [<c00500c0>] (ret_fast_syscall+0x0/0x30) r8:c00502c8 r7:00000004 r6:403525e8 r5:40126000 r4:00000004 Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-08 16:43:19 +00:00
mutex_unlock(&sdata->u.mgd.mtx);
break;
case NL80211_IFTYPE_ADHOC:
changed |= BSS_CHANGED_IBSS;
/* fall through */
case NL80211_IFTYPE_AP:
changed |= BSS_CHANGED_SSID;
/* fall through */
case NL80211_IFTYPE_MESH_POINT:
changed |= BSS_CHANGED_BEACON |
BSS_CHANGED_BEACON_ENABLED;
ieee80211_bss_info_change_notify(sdata, changed);
break;
case NL80211_IFTYPE_WDS:
break;
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_MONITOR:
/* ignore virtual */
break;
case NL80211_IFTYPE_UNSPECIFIED:
case NUM_NL80211_IFTYPES:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_P2P_GO:
WARN_ON(1);
break;
}
}
/*
* Clear the WLAN_STA_BLOCK_BA flag so new aggregation
* sessions can be established after a resume.
*
* Also tear down aggregation sessions since reconfiguring
* them in a hardware restart scenario is not easily done
* right now, and the hardware will have lost information
* about the sessions, but we and the AP still think they
* are active. This is really a workaround though.
*/
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list) {
ieee80211_sta_tear_down_BA_sessions(sta, true);
clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
}
mutex_unlock(&local->sta_mtx);
}
/* add back keys */
list_for_each_entry(sdata, &local->interfaces, list)
if (ieee80211_sdata_running(sdata))
ieee80211_enable_keys(sdata);
wake_up:
ieee80211_wake_queues_by_reason(hw,
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
/*
* If this is for hw restart things are still running.
* We may want to change that later, however.
*/
if (!local->suspended)
return 0;
#ifdef CONFIG_PM
/* first set suspended false, then resuming */
local->suspended = false;
mb();
local->resuming = false;
list_for_each_entry(sdata, &local->interfaces, list) {
switch(sdata->vif.type) {
case NL80211_IFTYPE_STATION:
ieee80211_sta_restart(sdata);
break;
case NL80211_IFTYPE_ADHOC:
ieee80211_ibss_restart(sdata);
break;
case NL80211_IFTYPE_MESH_POINT:
ieee80211_mesh_restart(sdata);
break;
default:
break;
}
}
mod_timer(&local->sta_cleanup, jiffies + 1);
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list)
mesh_plink_restart(sta);
mutex_unlock(&local->sta_mtx);
#else
WARN_ON(1);
#endif
return 0;
}
void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local;
struct ieee80211_key *key;
if (WARN_ON(!vif))
return;
sdata = vif_to_sdata(vif);
local = sdata->local;
if (WARN_ON(!local->resuming))
return;
if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
return;
sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
mutex_lock(&local->key_mtx);
list_for_each_entry(key, &sdata->key_list, list)
key->flags |= KEY_FLAG_TAINTED;
mutex_unlock(&local->key_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
enum ieee80211_smps_mode *smps_mode)
{
if (ifmgd->associated) {
*smps_mode = ifmgd->ap_smps;
if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
if (ifmgd->powersave)
*smps_mode = IEEE80211_SMPS_DYNAMIC;
else
*smps_mode = IEEE80211_SMPS_OFF;
}
return 1;
}
return 0;
}
/* must hold iflist_mtx */
void ieee80211_recalc_smps(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata;
enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
int count = 0;
lockdep_assert_held(&local->iflist_mtx);
/*
* This function could be improved to handle multiple
* interfaces better, but right now it makes any
* non-station interfaces force SM PS to be turned
* off. If there are multiple station interfaces it
* could also use the best possible mode, e.g. if
* one is in static and the other in dynamic then
* dynamic is ok.
*/
list_for_each_entry(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata))
continue;
if (sdata->vif.type != NL80211_IFTYPE_STATION)
goto set;
count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
if (count > 1) {
smps_mode = IEEE80211_SMPS_OFF;
break;
}
}
if (smps_mode == local->smps_mode)
return;
set:
local->smps_mode = smps_mode;
/* changed flag is auto-detected for this */
ieee80211_hw_config(local, 0);
}
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
{
int i;
for (i = 0; i < n_ids; i++)
if (ids[i] == id)
return true;
return false;
}
/**
* ieee80211_ie_split - split an IE buffer according to ordering
*
* @ies: the IE buffer
* @ielen: the length of the IE buffer
* @ids: an array with element IDs that are allowed before
* the split
* @n_ids: the size of the element ID array
* @offset: offset where to start splitting in the buffer
*
* This function splits an IE buffer by updating the @offset
* variable to point to the location where the buffer should be
* split.
*
* It assumes that the given IE buffer is well-formed, this
* has to be guaranteed by the caller!
*
* It also assumes that the IEs in the buffer are ordered
* correctly, if not the result of using this function will not
* be ordered correctly either, i.e. it does no reordering.
*
* The function returns the offset where the next part of the
* buffer starts, which may be @ielen if the entire (remainder)
* of the buffer should be used.
*/
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids, size_t offset)
{
size_t pos = offset;
while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
pos += 2 + ies[pos + 1];
return pos;
}
size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
{
size_t pos = offset;
while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
pos += 2 + ies[pos + 1];
return pos;
}
static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
int rssi_min_thold,
int rssi_max_thold)
{
trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
return;
/*
* Scale up threshold values before storing it, as the RSSI averaging
* algorithm uses a scaled up value as well. Change this scaling
* factor if the RSSI averaging algorithm changes.
*/
sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
}
void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
int rssi_min_thold,
int rssi_max_thold)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
WARN_ON(rssi_min_thold == rssi_max_thold ||
rssi_min_thold > rssi_max_thold);
_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
rssi_max_thold);
}
EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
_ieee80211_enable_rssi_reports(sdata, 0, 0);
}
EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
struct ieee80211_supported_band *sband;
int rate;
u8 i, rates, *pos;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
rates = sband->n_bitrates;
if (rates > 8)
rates = 8;
if (skb_tailroom(skb) < rates + 2)
return -ENOMEM;
pos = skb_put(skb, rates + 2);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = rates;
for (i = 0; i < rates; i++) {
rate = sband->bitrates[i].bitrate;
*pos++ = (u8) (rate / 5);
}
return 0;
}
int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
struct ieee80211_supported_band *sband;
int rate;
u8 i, exrates, *pos;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
exrates = sband->n_bitrates;
if (exrates > 8)
exrates -= 8;
else
exrates = 0;
if (skb_tailroom(skb) < exrates + 2)
return -ENOMEM;
if (exrates) {
pos = skb_put(skb, exrates + 2);
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = exrates;
for (i = 8; i < sband->n_bitrates; i++) {
rate = sband->bitrates[i].bitrate;
*pos++ = (u8) (rate / 5);
}
}
return 0;
}