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mac80211: Use suitable semantics for beacon availability indication 

Currently beacon availability upon association is marked by have_beacon
flag of assoc_data structure that becomes unavailable when association
completes. However beacon availability indication is required also after
association to inform a driver. Currently dtim_period parameter is used
for this purpose. Move have_beacon flag to another structure, persistant
throughout a interface's life cycle. Use suitable sematics for beacon
availability indication.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
[fix another instance of BSS_CHANGED_DTIM_PERIOD in docs]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Alexander Bondar 2013-05-16 17:34:17 +03:00 committed by Johannes Berg
parent 482a9c74fa
commit 989c6505cd
5 changed files with 21 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -785,7 +785,7 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
if (ret)
IWL_ERR(mvm, "failed to update quotas\n");
}
} else if (changes & BSS_CHANGED_DTIM_PERIOD) {
} else if (changes & BSS_CHANGED_BEACON_INFO) {
/*
* We received a beacon _after_ association so
* remove the session protection.

8
include/net/mac80211.h
View File

@ -217,8 +217,8 @@ struct ieee80211_chanctx_conf {
* @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
* @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
* changed (currently only in P2P client mode, GO mode will be later)
* @BSS_CHANGED_DTIM_PERIOD: the DTIM period value was changed (set when
* it becomes valid, managed mode only)
* @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available:
* currently dtim_period only is under consideration.
* @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
* note that this is only called when it changes after the channel
* context had been assigned.
@ -244,7 +244,7 @@ enum ieee80211_bss_change {
BSS_CHANGED_PS = 1<<17,
BSS_CHANGED_TXPOWER = 1<<18,
BSS_CHANGED_P2P_PS = 1<<19,
BSS_CHANGED_DTIM_PERIOD = 1<<20,
BSS_CHANGED_BEACON_INFO = 1<<20,
BSS_CHANGED_BANDWIDTH = 1<<21,
/* when adding here, make sure to change ieee80211_reconfig */
@ -288,7 +288,7 @@ enum ieee80211_rssi_event {
* IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
* @dtim_period: num of beacons before the next DTIM, for beaconing,
* valid in station mode only if after the driver was notified
* with the %BSS_CHANGED_DTIM_PERIOD flag, will be non-zero then.
* with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then.
* @sync_tsf: last beacon's/probe response's TSF timestamp (could be old
* as it may have been received during scanning long ago). If the
* HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can

3
net/mac80211/ieee80211_i.h
View File

@ -366,7 +366,7 @@ struct ieee80211_mgd_assoc_data {
u8 ssid_len;
u8 supp_rates_len;
bool wmm, uapsd;
bool have_beacon, need_beacon;
bool need_beacon;
bool synced;
bool timeout_started;
@ -404,6 +404,7 @@ struct ieee80211_if_managed {
bool powersave; /* powersave requested for this iface */
bool broken_ap; /* AP is broken -- turn off powersave */
bool have_beacon;
u8 dtim_period;
enum ieee80211_smps_mode req_smps, /* requested smps mode */
driver_smps_mode; /* smps mode request */

20
net/mac80211/mlme.c
View File

@ -1360,7 +1360,7 @@ static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
IEEE80211_STA_CONNECTION_POLL))
return false;
if (!sdata->vif.bss_conf.dtim_period)
if (!mgd->have_beacon)
return false;
rcu_read_lock();
@ -1771,7 +1771,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ieee80211_led_assoc(local, 1);
if (sdata->u.mgd.assoc_data->have_beacon) {
if (sdata->u.mgd.have_beacon) {
/*
* If the AP is buggy we may get here with no DTIM period
* known, so assume it's 1 which is the only safe assumption
@ -1779,7 +1779,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
* probably just won't work at all.
*/
bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
bss_info_changed |= BSS_CHANGED_BEACON_INFO;
} else {
bss_conf->dtim_period = 0;
}
@ -1903,6 +1903,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
del_timer_sync(&sdata->u.mgd.chswitch_timer);
sdata->vif.bss_conf.dtim_period = 0;
ifmgd->have_beacon = false;
ifmgd->flags = 0;
ieee80211_vif_release_channel(sdata);
@ -2877,7 +2878,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
const struct ieee80211_tim_ie *tim_ie = elems.tim;
ifmgd->dtim_period = tim_ie->dtim_period;
}
ifmgd->assoc_data->have_beacon = true;
ifmgd->have_beacon = true;
ifmgd->assoc_data->need_beacon = false;
if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
sdata->vif.bss_conf.sync_tsf =
@ -3059,7 +3060,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
* If we haven't had a beacon before, tell the driver about the
* DTIM period (and beacon timing if desired) now.
*/
if (!bss_conf->dtim_period) {
if (!ifmgd->have_beacon) {
/* a few bogus AP send dtim_period = 0 or no TIM IE */
if (elems.tim)
bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
@ -3078,7 +3079,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
sdata->vif.bss_conf.sync_dtim_count = 0;
}
changed |= BSS_CHANGED_DTIM_PERIOD;
changed |= BSS_CHANGED_BEACON_INFO;
ifmgd->have_beacon = true;
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local, -1);
@ -3424,8 +3426,7 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
time_after(jiffies, ifmgd->assoc_data->timeout)) {
if ((ifmgd->assoc_data->need_beacon &&
!ifmgd->assoc_data->have_beacon) ||
if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
ieee80211_do_assoc(sdata)) {
u8 bssid[ETH_ALEN];
@ -4193,6 +4194,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
ifmgd->assoc_data = assoc_data;
ifmgd->dtim_period = 0;
ifmgd->have_beacon = false;
err = ieee80211_prep_connection(sdata, req->bss, true);
if (err)
@ -4224,7 +4226,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
ifmgd->dtim_period = tim->dtim_period;
dtim_count = tim->dtim_count;
}
assoc_data->have_beacon = true;
ifmgd->have_beacon = true;
assoc_data->timeout = jiffies;
assoc_data->timeout_started = true;

5
net/mac80211/util.c
View File

@ -1584,8 +1584,9 @@ int ieee80211_reconfig(struct ieee80211_local *local)
BSS_CHANGED_ARP_FILTER |
BSS_CHANGED_PS;
if (sdata->u.mgd.dtim_period)
changed |= BSS_CHANGED_DTIM_PERIOD;
/* Re-send beacon info report to the driver */
if (sdata->u.mgd.have_beacon)
changed |= BSS_CHANGED_BEACON_INFO;
sdata_lock(sdata);
ieee80211_bss_info_change_notify(sdata, changed);