1 files changed, 116 insertions, 168 deletions

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index f803f8b72a93..b6c163ac22da 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -478,6 +478,39 @@ static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
         }
 }
 
+void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
+{
+        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+        struct ieee80211_local *local = sdata->local;
+        struct ieee80211_conf *conf = &local->hw.conf;
+
+        WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
+                !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
+                (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
+
+        local->disable_dynamic_ps = false;
+        conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
+}
+EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
+
+void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
+{
+        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+        struct ieee80211_local *local = sdata->local;
+        struct ieee80211_conf *conf = &local->hw.conf;
+
+        WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
+                !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
+                (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
+
+        local->disable_dynamic_ps = true;
+        conf->dynamic_ps_timeout = 0;
+        del_timer_sync(&local->dynamic_ps_timer);
+        ieee80211_queue_work(&local->hw,
+                             &local->dynamic_ps_enable_work);
+}
+EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
+
 /* powersave */
 static void ieee80211_enable_ps(struct ieee80211_local *local,
                                 struct ieee80211_sub_if_data *sdata)
@@ -553,6 +586,7 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
             found->u.mgd.associated->beacon_ies &&
             !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
                                     IEEE80211_STA_CONNECTION_POLL))) {
+                struct ieee80211_conf *conf = &local->hw.conf;
                 s32 beaconint_us;
 
                 if (latency < 0)
@@ -561,25 +595,24 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
                 beaconint_us = ieee80211_tu_to_usec(
                                         found->vif.bss_conf.beacon_int);
 
-                timeout = local->hw.conf.dynamic_ps_forced_timeout;
+                timeout = local->dynamic_ps_forced_timeout;
                 if (timeout < 0) {
                         /*
+                         * 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.
                          */
-                        if (latency == 2000000000)
-                                timeout = 100;
-                        else if (latency <= 50000)
-                                timeout = 300;
-                        else if (latency <= 100000)
-                                timeout = 100;
-                        else if (latency <= 500000)
-                                timeout = 50;
-                        else
+                        if (latency > 1900000000 && latency != 2000000000)
                                 timeout = 0;
+                        else
+                                timeout = 100;
                 }
-                local->hw.conf.dynamic_ps_timeout = timeout;
+                local->dynamic_ps_user_timeout = timeout;
+                if (!local->disable_dynamic_ps)
+                        conf->dynamic_ps_timeout =
+                                local->dynamic_ps_user_timeout;
 
                 if (beaconint_us > latency) {
                         local->ps_sdata = NULL;
@@ -665,10 +698,11 @@ void ieee80211_dynamic_ps_timer(unsigned long data)
 
 /* MLME */
 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
-                                     struct ieee80211_if_managed *ifmgd,
+                                     struct ieee80211_sub_if_data *sdata,
                                      u8 *wmm_param, size_t wmm_param_len)
 {
         struct ieee80211_tx_queue_params params;
+        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
         size_t left;
         int count;
         u8 *pos, uapsd_queues = 0;
@@ -757,8 +791,8 @@ static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
         }
 
         /* enable WMM or activate new settings */
-        local->hw.conf.flags |= IEEE80211_CONF_QOS;
-        drv_config(local, IEEE80211_CONF_CHANGE_QOS);
+        sdata->vif.bss_conf.qos = true;
+        ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
 }
 
 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
@@ -806,11 +840,12 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 {
         struct ieee80211_bss *bss = (void *)cbss->priv;
         struct ieee80211_local *local = sdata->local;
+        struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 
         bss_info_changed |= BSS_CHANGED_ASSOC;
         /* set timing information */
-        sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
-        sdata->vif.bss_conf.timestamp = cbss->tsf;
+        bss_conf->beacon_int = cbss->beacon_interval;
+        bss_conf->timestamp = cbss->tsf;
 
         bss_info_changed |= BSS_CHANGED_BEACON_INT;
         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
@@ -835,7 +870,12 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 
         ieee80211_led_assoc(local, 1);
 
-        sdata->vif.bss_conf.assoc = 1;
+        if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
+                bss_conf->dtim_period = bss->dtim_period;
+        else
+                bss_conf->dtim_period = 0;
+
+        bss_conf->assoc = 1;
         /*
          * For now just always ask the driver to update the basic rateset
          * when we have associated, we aren't checking whether it actually
@@ -848,9 +888,15 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 
         /* Tell the driver to monitor connection quality (if supported) */
         if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
-            sdata->vif.bss_conf.cqm_rssi_thold)
+            bss_conf->cqm_rssi_thold)
                 bss_info_changed |= BSS_CHANGED_CQM;
 
+        /* Enable ARP filtering */
+        if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
+                bss_conf->arp_filter_enabled = sdata->arp_filter_state;
+                bss_info_changed |= BSS_CHANGED_ARP_FILTER;
+        }
+
         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 
         mutex_lock(&local->iflist_mtx);
@@ -898,13 +944,13 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
         netif_tx_stop_all_queues(sdata->dev);
         netif_carrier_off(sdata->dev);
 
-        rcu_read_lock();
+        mutex_lock(&local->sta_mtx);
         sta = sta_info_get(sdata, bssid);
         if (sta) {
-                set_sta_flags(sta, WLAN_STA_DISASSOC);
+                set_sta_flags(sta, WLAN_STA_BLOCK_BA);
                 ieee80211_sta_tear_down_BA_sessions(sta);
         }
-        rcu_read_unlock();
+        mutex_unlock(&local->sta_mtx);
 
         changed |= ieee80211_reset_erp_info(sdata);
 
@@ -932,6 +978,12 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
         ieee80211_hw_config(local, config_changed);
 
+        /* Disable ARP filtering */
+        if (sdata->vif.bss_conf.arp_filter_enabled) {
+                sdata->vif.bss_conf.arp_filter_enabled = false;
+                changed |= BSS_CHANGED_ARP_FILTER;
+        }
+
         /* The BSSID (not really interesting) and HT changed */
         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
         ieee80211_bss_info_change_notify(sdata, changed);
@@ -1279,7 +1331,7 @@ static bool ieee80211_assoc_success(struct ieee80211_work *wk,
         }
 
         if (elems.wmm_param)
-                ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
+                ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
                                          elems.wmm_param_len);
         else
                 ieee80211_set_wmm_default(sdata);
@@ -1551,7 +1603,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
                                       true);
 
-                ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
+                ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
                                          elems.wmm_param_len);
         }
 
@@ -1633,35 +1685,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
         ieee80211_bss_info_change_notify(sdata, changed);
 }
 
-ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
-                                          struct sk_buff *skb)
-{
-        struct ieee80211_local *local = sdata->local;
-        struct ieee80211_mgmt *mgmt;
-        u16 fc;
-
-        if (skb->len < 24)
-                return RX_DROP_MONITOR;
-
-        mgmt = (struct ieee80211_mgmt *) skb->data;
-        fc = le16_to_cpu(mgmt->frame_control);
-
-        switch (fc & IEEE80211_FCTL_STYPE) {
-        case IEEE80211_STYPE_PROBE_RESP:
-        case IEEE80211_STYPE_BEACON:
-        case IEEE80211_STYPE_DEAUTH:
-        case IEEE80211_STYPE_DISASSOC:
-        case IEEE80211_STYPE_ACTION:
-                skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
-                ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
-                return RX_QUEUED;
-        }
-
-        return RX_DROP_MONITOR;
-}
-
-static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
-                                         struct sk_buff *skb)
+void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+                                  struct sk_buff *skb)
 {
         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
         struct ieee80211_rx_status *rx_status;
@@ -1693,44 +1718,6 @@ static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
                         break;
                 case IEEE80211_STYPE_ACTION:
                         switch (mgmt->u.action.category) {
-                        case WLAN_CATEGORY_BACK: {
-                                struct ieee80211_local *local = sdata->local;
-                                int len = skb->len;
-                                struct sta_info *sta;
-
-                                rcu_read_lock();
-                                sta = sta_info_get(sdata, mgmt->sa);
-                                if (!sta) {
-                                        rcu_read_unlock();
-                                        break;
-                                }
-
-                                local_bh_disable();
-
-                                switch (mgmt->u.action.u.addba_req.action_code) {
-                                case WLAN_ACTION_ADDBA_REQ:
-                                        if (len < (IEEE80211_MIN_ACTION_SIZE +
-                                                   sizeof(mgmt->u.action.u.addba_req)))
-                                                break;
-                                        ieee80211_process_addba_request(local, sta, mgmt, len);
-                                        break;
-                                case WLAN_ACTION_ADDBA_RESP:
-                                        if (len < (IEEE80211_MIN_ACTION_SIZE +
-                                                   sizeof(mgmt->u.action.u.addba_resp)))
-                                                break;
-                                        ieee80211_process_addba_resp(local, sta, mgmt, len);
-                                        break;
-                                case WLAN_ACTION_DELBA:
-                                        if (len < (IEEE80211_MIN_ACTION_SIZE +
-                                                   sizeof(mgmt->u.action.u.delba)))
-                                                break;
-                                        ieee80211_process_delba(sdata, sta, mgmt, len);
-                                        break;
-                                }
-                                local_bh_enable();
-                                rcu_read_unlock();
-                                break;
-                                }
                         case WLAN_CATEGORY_SPECTRUM_MGMT:
                                 ieee80211_sta_process_chanswitch(sdata,
                                                 &mgmt->u.action.u.chan_switch.sw_elem,
@@ -1754,7 +1741,7 @@ static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
                 default:
                         WARN(1, "unexpected: %d", rma);
                 }
-                goto out;
+                return;
         }
 
         mutex_unlock(&ifmgd->mtx);
@@ -1769,7 +1756,8 @@ static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
                         if (wk->sdata != sdata)
                                 continue;
 
-                        if (wk->type != IEEE80211_WORK_ASSOC)
+                        if (wk->type != IEEE80211_WORK_ASSOC &&
+                            wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
                                 continue;
 
                         if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
@@ -1799,8 +1787,6 @@ static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 
                 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
         }
- out:
-        kfree_skb(skb);
 }
 
 static void ieee80211_sta_timer(unsigned long data)
@@ -1815,39 +1801,13 @@ static void ieee80211_sta_timer(unsigned long data)
                 return;
         }
 
-        ieee80211_queue_work(&local->hw, &ifmgd->work);
+        ieee80211_queue_work(&local->hw, &sdata->work);
 }
 
-static void ieee80211_sta_work(struct work_struct *work)
+void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
 {
-        struct ieee80211_sub_if_data *sdata =
-                container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
         struct ieee80211_local *local = sdata->local;
-        struct ieee80211_if_managed *ifmgd;
-        struct sk_buff *skb;
-
-        if (!ieee80211_sdata_running(sdata))
-                return;
-
-        if (local->scanning)
-                return;
-
-        if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
-                return;
-
-        /*
-         * ieee80211_queue_work() should have picked up most cases,
-         * here we'll pick the the rest.
-         */
-        if (WARN(local->suspended, "STA MLME work scheduled while "
-                 "going to suspend\n"))
-                return;
-
-        ifmgd = &sdata->u.mgd;
-
-        /* first process frames to avoid timing out while a frame is pending */
-        while ((skb = skb_dequeue(&ifmgd->skb_queue)))
-                ieee80211_sta_rx_queued_mgmt(sdata, skb);
+        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
         /* then process the rest of the work */
         mutex_lock(&ifmgd->mtx);
@@ -1942,8 +1902,7 @@ static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
                 ieee80211_queue_work(&sdata->local->hw,
                            &sdata->u.mgd.monitor_work);
                 /* and do all the other regular work too */
-                ieee80211_queue_work(&sdata->local->hw,
-                           &sdata->u.mgd.work);
+                ieee80211_queue_work(&sdata->local->hw, &sdata->work);
         }
 }
 
@@ -1958,7 +1917,6 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
          * time -- the code here is properly synchronised.
          */
 
-        cancel_work_sync(&ifmgd->work);
         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
         if (del_timer_sync(&ifmgd->timer))
                 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
@@ -1990,7 +1948,6 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
         struct ieee80211_if_managed *ifmgd;
 
         ifmgd = &sdata->u.mgd;
-        INIT_WORK(&ifmgd->work, ieee80211_sta_work);
         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
         INIT_WORK(&ifmgd->beacon_connection_loss_work,
@@ -2003,7 +1960,6 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
                     (unsigned long) sdata);
         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
                     (unsigned long) sdata);
-        skb_queue_head_init(&ifmgd->skb_queue);
 
         ifmgd->flags = 0;
 
@@ -2081,6 +2037,8 @@ int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
                 auth_alg = WLAN_AUTH_OPEN;
                 break;
         case NL80211_AUTHTYPE_SHARED_KEY:
+                if (IS_ERR(sdata->local->wep_tx_tfm))
+                        return -EOPNOTSUPP;
                 auth_alg = WLAN_AUTH_SHARED_KEY;
                 break;
         case NL80211_AUTHTYPE_FT:
@@ -2134,6 +2092,8 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
                                                   struct sk_buff *skb)
 {
         struct ieee80211_mgmt *mgmt;
+        struct ieee80211_rx_status *rx_status;
+        struct ieee802_11_elems elems;
         u16 status;
 
         if (!skb) {
@@ -2141,6 +2101,19 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
                 return WORK_DONE_DESTROY;
         }
 
+        if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
+                mutex_lock(&wk->sdata->u.mgd.mtx);
+                rx_status = (void *) skb->cb;
+                ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
+                ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
+                                      &elems, true);
+                mutex_unlock(&wk->sdata->u.mgd.mtx);
+
+                wk->type = IEEE80211_WORK_ASSOC;
+                /* not really done yet */
+                return WORK_DONE_REQUEUE;
+        }
+
         mgmt = (void *)skb->data;
         status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
 
@@ -2153,6 +2126,7 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
                                                     wk->filter_ta);
                         return WORK_DONE_DESTROY;
                 }
+
                 mutex_unlock(&wk->sdata->u.mgd.mtx);
         }
 
@@ -2253,10 +2227,14 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
         if (req->prev_bssid)
                 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
 
-        wk->type = IEEE80211_WORK_ASSOC;
         wk->chan = req->bss->channel;
         wk->sdata = sdata;
         wk->done = ieee80211_assoc_done;
+        if (!bss->dtim_period &&
+            sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
+                wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
+        else
+                wk->type = IEEE80211_WORK_ASSOC;
 
         if (req->use_mfp) {
                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
@@ -2282,14 +2260,16 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
         struct ieee80211_work *wk;
-        const u8 *bssid = req->bss->bssid;
+        u8 bssid[ETH_ALEN];
+        bool assoc_bss = false;
 
         mutex_lock(&ifmgd->mtx);
 
+        memcpy(bssid, req->bss->bssid, ETH_ALEN);
         if (ifmgd->associated == req->bss) {
-                bssid = req->bss->bssid;
-                ieee80211_set_disassoc(sdata, true);
+                ieee80211_set_disassoc(sdata, false);
                 mutex_unlock(&ifmgd->mtx);
+                assoc_bss = true;
         } else {
                 bool not_auth_yet = false;
 
@@ -2302,7 +2282,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 
                         if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
                             wk->type != IEEE80211_WORK_AUTH &&
-                            wk->type != IEEE80211_WORK_ASSOC)
+                            wk->type != IEEE80211_WORK_ASSOC &&
+                            wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
                                 continue;
 
                         if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
@@ -2335,6 +2316,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
         ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
                                        req->reason_code, cookie,
                                        !req->local_state_change);
+        if (assoc_bss)
+                sta_info_destroy_addr(sdata, bssid);
 
         ieee80211_recalc_idle(sdata->local);
 
@@ -2379,41 +2362,6 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
         return 0;
 }
 
-int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
-                         struct ieee80211_channel *chan,
-                         enum nl80211_channel_type channel_type,
-                         const u8 *buf, size_t len, u64 *cookie)
-{
-        struct ieee80211_local *local = sdata->local;
-        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
-        struct sk_buff *skb;
-
-        /* Check that we are on the requested channel for transmission */
-        if ((chan != local->tmp_channel ||
-             channel_type != local->tmp_channel_type) &&
-            (chan != local->oper_channel ||
-             channel_type != local->_oper_channel_type))
-                return -EBUSY;
-
-        skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
-        if (!skb)
-                return -ENOMEM;
-        skb_reserve(skb, local->hw.extra_tx_headroom);
-
-        memcpy(skb_put(skb, len), buf, len);
-
-        if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
-                IEEE80211_SKB_CB(skb)->flags |=
-                        IEEE80211_TX_INTFL_DONT_ENCRYPT;
-        IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
-                IEEE80211_TX_CTL_REQ_TX_STATUS;
-        skb->dev = sdata->dev;
-        ieee80211_tx_skb(sdata, skb);
-
-        *cookie = (unsigned long) skb;
-        return 0;
-}
-
 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
                                enum nl80211_cqm_rssi_threshold_event rssi_event,
                                gfp_t gfp)