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mac80211: refactor ieee80211_ibss_process_chanswitch()

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Refactor ieee80211_ibss_process_chanswitch() to use
ieee80211_channel_switch() and avoid code duplication.

Tested by: Simon Wunderlich <sw@simonwunderlich.de>
Acked by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2013-12-13 21:13:50 +02:00 committed by Johannes Berg
parent 43552be1da
commit 82a8e17d4a
3 changed files with 17 additions and 50 deletions
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4
net/mac80211/cfg.c
View File

@ -3038,8 +3038,8 @@ unlock:
sdata_unlock(sdata);
}
static int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_csa_settings *params)
int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_csa_settings *params)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;

61
net/mac80211/ibss.c
View File

@ -788,18 +788,10 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
struct cfg80211_csa_settings params;
struct ieee80211_csa_ie csa_ie;
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_chanctx *chanctx;
enum nl80211_channel_type ch_type;
int err, num_chanctx;
int err;
u32 sta_flags;
if (sdata->vif.csa_active)
return true;
if (!sdata->vif.bss_conf.ibss_joined)
return false;
sta_flags = IEEE80211_STA_DISABLE_VHT;
switch (ifibss->chandef.width) {
case NL80211_CHAN_WIDTH_5:
@ -834,9 +826,6 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
params.count = csa_ie.count;
params.chandef = csa_ie.chandef;
if (ifibss->chandef.chan->band != params.chandef.chan->band)
goto disconnect;
switch (ifibss->chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
@ -892,29 +881,13 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
params.radar_required = true;
}
rcu_read_lock();
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
if (!chanctx_conf) {
rcu_read_unlock();
goto disconnect;
if (cfg80211_chandef_identical(&params.chandef,
&sdata->vif.bss_conf.chandef)) {
ibss_dbg(sdata,
"received csa with an identical chandef, ignoring\n");
return true;
}
/* don't handle for multi-VIF cases */
chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
if (chanctx->refcount > 1) {
rcu_read_unlock();
goto disconnect;
}
num_chanctx = 0;
list_for_each_entry_rcu(chanctx, &sdata->local->chanctx_list, list)
num_chanctx++;
if (num_chanctx > 1) {
rcu_read_unlock();
goto disconnect;
}
rcu_read_unlock();
/* all checks done, now perform the channel switch. */
ibss_dbg(sdata,
"received channel switch announcement to go to channel %d MHz\n",
@ -922,19 +895,9 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
params.block_tx = !!csa_ie.mode;
ieee80211_ibss_csa_beacon(sdata, &params);
sdata->csa_radar_required = params.radar_required;
if (params.block_tx)
ieee80211_stop_queues_by_reason(&sdata->local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_chandef = params.chandef;
sdata->vif.csa_active = true;
ieee80211_bss_info_change_notify(sdata, err);
drv_channel_switch_beacon(sdata, &params.chandef);
if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
&params))
goto disconnect;
ieee80211_ibss_csa_mark_radar(sdata);
@ -970,7 +933,8 @@ ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata,
if (len < required_len)
return;
ieee80211_ibss_process_chanswitch(sdata, elems, false);
if (!sdata->vif.csa_active)
ieee80211_ibss_process_chanswitch(sdata, elems, false);
}
static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata,
@ -1151,7 +1115,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
goto put_bss;
/* process channel switch */
if (ieee80211_ibss_process_chanswitch(sdata, elems, true))
if (sdata->vif.csa_active ||
ieee80211_ibss_process_chanswitch(sdata, elems, true))
goto put_bss;
/* same BSSID */

2
net/mac80211/ieee80211_i.h
View File

@ -1450,6 +1450,8 @@ void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
/* channel switch handling */
void ieee80211_csa_finalize_work(struct work_struct *work);
int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_csa_settings *params);
/* interface handling */
int ieee80211_iface_init(void);