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author | Jens Axboe <jaxboe@fusionio.com> | 2011-03-01 15:04:39 -0500 |
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committer | Jens Axboe <jaxboe@fusionio.com> | 2011-03-01 15:04:39 -0500 |
commit | 6fae9c25134baffbeeb20031479e7ff6f6d8eec0 (patch) | |
tree | c9ab89992ce5293a43cd455a81dc8a5926a28a5e /net/mac80211/mlme.c | |
parent | c186794dbb466b45cf40f942f2d09d6d5b4b0e42 (diff) | |
parent | f5412be599602124d2bdd49947b231dd77c0bf99 (diff) | |
download | kernel_samsung_crespo-6fae9c25134baffbeeb20031479e7ff6f6d8eec0.zip kernel_samsung_crespo-6fae9c25134baffbeeb20031479e7ff6f6d8eec0.tar.gz kernel_samsung_crespo-6fae9c25134baffbeeb20031479e7ff6f6d8eec0.tar.bz2 |
Merge commit 'v2.6.38-rc6' into for-2.6.39/core
Conflicts:
block/cfq-iosched.c
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'net/mac80211/mlme.c')
-rw-r--r-- | net/mac80211/mlme.c | 227 |
1 files changed, 175 insertions, 52 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index a3a9421..45fbb9e 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -28,13 +28,19 @@ #include "rate.h" #include "led.h" +#define IEEE80211_MAX_NULLFUNC_TRIES 2 #define IEEE80211_MAX_PROBE_TRIES 5 /* - * beacon loss detection timeout - * XXX: should depend on beacon interval + * Beacon loss timeout is calculated as N frames times the + * advertised beacon interval. This may need to be somewhat + * higher than what hardware might detect to account for + * delays in the host processing frames. But since we also + * probe on beacon miss before declaring the connection lost + * default to what we want. */ -#define IEEE80211_BEACON_LOSS_TIME (2 * HZ) +#define IEEE80211_BEACON_LOSS_COUNT 7 + /* * Time the connection can be idle before we probe * it to see if we can still talk to the AP. @@ -121,7 +127,7 @@ void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) return; mod_timer(&sdata->u.mgd.bcn_mon_timer, - round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); + round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); } void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) @@ -619,11 +625,12 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) /* * Go to full PSM if the user configures a very low * latency requirement. - * The 2 second value is there for compatibility until - * the PM_QOS_NETWORK_LATENCY is configured with real - * values. + * The 2000 second value is there for compatibility + * until the PM_QOS_NETWORK_LATENCY is configured + * with real values. */ - if (latency > 1900000000 && latency != 2000000000) + if (latency > (1900 * USEC_PER_MSEC) && + latency != (2000 * USEC_PER_SEC)) timeout = 0; else timeout = 100; @@ -871,6 +878,9 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, bss_info_changed |= ieee80211_handle_bss_capability(sdata, cbss->capability, bss->has_erp_value, bss->erp_value); + sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( + IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); + sdata->u.mgd.associated = cbss; memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); @@ -1026,6 +1036,54 @@ void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, ieee80211_sta_reset_conn_monitor(sdata); } +static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + + if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | + IEEE80211_STA_CONNECTION_POLL))) + return; + + ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | + IEEE80211_STA_BEACON_POLL); + mutex_lock(&sdata->local->iflist_mtx); + ieee80211_recalc_ps(sdata->local, -1); + mutex_unlock(&sdata->local->iflist_mtx); + + if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) + return; + + /* + * We've received a probe response, but are not sure whether + * we have or will be receiving any beacons or data, so let's + * schedule the timers again, just in case. + */ + ieee80211_sta_reset_beacon_monitor(sdata); + + mod_timer(&ifmgd->conn_mon_timer, + round_jiffies_up(jiffies + + IEEE80211_CONNECTION_IDLE_TIME)); +} + +void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, + struct ieee80211_hdr *hdr, bool ack) +{ + if (!ieee80211_is_data(hdr->frame_control)) + return; + + if (ack) + ieee80211_sta_reset_conn_monitor(sdata); + + if (ieee80211_is_nullfunc(hdr->frame_control) && + sdata->u.mgd.probe_send_count > 0) { + if (ack) + sdata->u.mgd.probe_send_count = 0; + else + sdata->u.mgd.nullfunc_failed = true; + ieee80211_queue_work(&sdata->local->hw, &sdata->work); + } +} + static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; @@ -1041,8 +1099,20 @@ static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) if (ifmgd->probe_send_count >= unicast_limit) dst = NULL; - ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); - ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0); + /* + * When the hardware reports an accurate Tx ACK status, it's + * better to send a nullfunc frame instead of a probe request, + * as it will kick us off the AP quickly if we aren't associated + * anymore. The timeout will be reset if the frame is ACKed by + * the AP. + */ + if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { + ifmgd->nullfunc_failed = false; + ieee80211_send_nullfunc(sdata->local, sdata, 0); + } else { + ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); + ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0); + } ifmgd->probe_send_count++; ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; @@ -1108,6 +1178,30 @@ static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, mutex_unlock(&ifmgd->mtx); } +struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); + struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + struct sk_buff *skb; + const u8 *ssid; + + if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) + return NULL; + + ASSERT_MGD_MTX(ifmgd); + + if (!ifmgd->associated) + return NULL; + + ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); + skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid, + ssid + 2, ssid[1], NULL, 0); + + return skb; +} +EXPORT_SYMBOL(ieee80211_ap_probereq_get); + static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; @@ -1485,29 +1579,8 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); if (ifmgd->associated && - memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && - ifmgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL)) { - ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | - IEEE80211_STA_BEACON_POLL); - mutex_lock(&sdata->local->iflist_mtx); - ieee80211_recalc_ps(sdata->local, -1); - mutex_unlock(&sdata->local->iflist_mtx); - - if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) - return; - - /* - * We've received a probe response, but are not sure whether - * we have or will be receiving any beacons or data, so let's - * schedule the timers again, just in case. - */ - ieee80211_sta_reset_beacon_monitor(sdata); - - mod_timer(&ifmgd->conn_mon_timer, - round_jiffies_up(jiffies + - IEEE80211_CONNECTION_IDLE_TIME)); - } + memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0) + ieee80211_reset_ap_probe(sdata); } /* @@ -1845,6 +1918,31 @@ static void ieee80211_sta_timer(unsigned long data) ieee80211_queue_work(&local->hw, &sdata->work); } +static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, + u8 *bssid) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + + ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | + IEEE80211_STA_BEACON_POLL); + + ieee80211_set_disassoc(sdata, true, true); + mutex_unlock(&ifmgd->mtx); + mutex_lock(&local->mtx); + ieee80211_recalc_idle(local); + mutex_unlock(&local->mtx); + /* + * must be outside lock due to cfg80211, + * but that's not a problem. + */ + ieee80211_send_deauth_disassoc(sdata, bssid, + IEEE80211_STYPE_DEAUTH, + WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, + NULL, true); + mutex_lock(&ifmgd->mtx); +} + void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; @@ -1857,12 +1955,49 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) IEEE80211_STA_CONNECTION_POLL) && ifmgd->associated) { u8 bssid[ETH_ALEN]; + int max_tries; memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); - if (time_is_after_jiffies(ifmgd->probe_timeout)) - run_again(ifmgd, ifmgd->probe_timeout); - else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { + if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) + max_tries = IEEE80211_MAX_NULLFUNC_TRIES; + else + max_tries = IEEE80211_MAX_PROBE_TRIES; + + /* ACK received for nullfunc probing frame */ + if (!ifmgd->probe_send_count) + ieee80211_reset_ap_probe(sdata); + else if (ifmgd->nullfunc_failed) { + if (ifmgd->probe_send_count < max_tries) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + wiphy_debug(local->hw.wiphy, + "%s: No ack for nullfunc frame to" + " AP %pM, try %d\n", + sdata->name, bssid, + ifmgd->probe_send_count); +#endif + ieee80211_mgd_probe_ap_send(sdata); + } else { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + wiphy_debug(local->hw.wiphy, + "%s: No ack for nullfunc frame to" + " AP %pM, disconnecting.\n", + sdata->name, bssid); +#endif + ieee80211_sta_connection_lost(sdata, bssid); + } + } else if (time_is_after_jiffies(ifmgd->probe_timeout)) + run_again(ifmgd, ifmgd->probe_timeout); + else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + wiphy_debug(local->hw.wiphy, + "%s: Failed to send nullfunc to AP %pM" + " after %dms, disconnecting.\n", + sdata->name, + bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); +#endif + ieee80211_sta_connection_lost(sdata, bssid); + } else if (ifmgd->probe_send_count < max_tries) { #ifdef CONFIG_MAC80211_VERBOSE_DEBUG wiphy_debug(local->hw.wiphy, "%s: No probe response from AP %pM" @@ -1877,27 +2012,13 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) * We actually lost the connection ... or did we? * Let's make sure! */ - ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | - IEEE80211_STA_BEACON_POLL); wiphy_debug(local->hw.wiphy, "%s: No probe response from AP %pM" " after %dms, disconnecting.\n", sdata->name, bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); - ieee80211_set_disassoc(sdata, true, true); - mutex_unlock(&ifmgd->mtx); - mutex_lock(&local->mtx); - ieee80211_recalc_idle(local); - mutex_unlock(&local->mtx); - /* - * must be outside lock due to cfg80211, - * but that's not a problem. - */ - ieee80211_send_deauth_disassoc(sdata, bssid, - IEEE80211_STYPE_DEAUTH, - WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, - NULL, true); - mutex_lock(&ifmgd->mtx); + + ieee80211_sta_connection_lost(sdata, bssid); } } @@ -1988,6 +2109,8 @@ void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) add_timer(&ifmgd->timer); if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) add_timer(&ifmgd->chswitch_timer); + ieee80211_sta_reset_beacon_monitor(sdata); + ieee80211_restart_sta_timer(sdata); } #endif |