diff options
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 580 |
1 files changed, 267 insertions, 313 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 3a8922c..5143d20 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -192,7 +192,7 @@ ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) return TX_CONTINUE; - if (unlikely(tx->local->sw_scanning) && + if (unlikely(test_bit(SCAN_OFF_CHANNEL, &tx->local->scanning)) && !ieee80211_is_probe_req(hdr->frame_control) && !ieee80211_is_nullfunc(hdr->frame_control)) /* @@ -317,30 +317,30 @@ ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) if (!atomic_read(&tx->sdata->bss->num_sta_ps)) return TX_CONTINUE; + /* buffered in hardware */ + if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) { + info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; + + return TX_CONTINUE; + } + /* buffered in mac80211 */ - if (tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) { - if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) - purge_old_ps_buffers(tx->local); - if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= - AP_MAX_BC_BUFFER) { + if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) + purge_old_ps_buffers(tx->local); + + if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG - if (net_ratelimit()) { - printk(KERN_DEBUG "%s: BC TX buffer full - " - "dropping the oldest frame\n", - tx->dev->name); - } + if (net_ratelimit()) + printk(KERN_DEBUG "%s: BC TX buffer full - dropping the oldest frame\n", + tx->dev->name); #endif - dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); - } else - tx->local->total_ps_buffered++; - skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); - return TX_QUEUED; - } + dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); + } else + tx->local->total_ps_buffered++; - /* buffered in hardware */ - info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; + skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); - return TX_CONTINUE; + return TX_QUEUED; } static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, @@ -373,7 +373,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) staflags = get_sta_flags(sta); if (unlikely((staflags & WLAN_STA_PS) && - !(staflags & WLAN_STA_PSPOLL))) { + !(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE))) { #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG printk(KERN_DEBUG "STA %pM aid %d: PS buffer (entries " "before %d)\n", @@ -400,6 +400,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) sta_info_set_tim_bit(sta); info->control.jiffies = jiffies; + info->control.vif = &tx->sdata->vif; info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; skb_queue_tail(&sta->ps_tx_buf, tx->skb); return TX_QUEUED; @@ -411,24 +412,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) sta->sta.addr); } #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ - if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) { - /* - * The sleeping station with pending data is now snoozing. - * It queried us for its buffered frames and will go back - * to deep sleep once it got everything. - * - * inform the driver, in case the hardware does powersave - * frame filtering and keeps a station blacklist on its own - * (e.g: p54), so that frames can be delivered unimpeded. - * - * Note: It should be safe to disable the filter now. - * As, it is really unlikely that we still have any pending - * frame for this station in the hw's buffers/fifos left, - * that is not rejected with a unsuccessful tx_status yet. - */ - info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; - } return TX_CONTINUE; } @@ -451,7 +435,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; - if (unlikely(tx->skb->do_not_encrypt)) + if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) tx->key = NULL; else if (tx->sta && (key = rcu_dereference(tx->sta->key))) tx->key = key; @@ -497,7 +481,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) } if (!tx->key || !(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) - tx->skb->do_not_encrypt = 1; + info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; return TX_CONTINUE; } @@ -512,6 +496,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) int i, len; bool inval = false, rts = false, short_preamble = false; struct ieee80211_tx_rate_control txrc; + u32 sta_flags; memset(&txrc, 0, sizeof(txrc)); @@ -544,7 +529,26 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) (tx->sta && test_sta_flags(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) txrc.short_preamble = short_preamble = true; + sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; + + /* + * Lets not bother rate control if we're associated and cannot + * talk to the sta. This should not happen. + */ + if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && + (sta_flags & WLAN_STA_ASSOC) && + !rate_usable_index_exists(sband, &tx->sta->sta), + "%s: Dropped data frame as no usable bitrate found while " + "scanning and associated. Target station: " + "%pM on %d GHz band\n", + tx->dev->name, hdr->addr1, + tx->channel->band ? 5 : 2)) + return TX_DROP; + /* + * If we're associated with the sta at this point we know we can at + * least send the frame at the lowest bit rate. + */ rate_control_get_rate(tx->sdata, tx->sta, &txrc); if (unlikely(info->control.rates[0].idx < 0)) @@ -676,7 +680,7 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) * number, if we have no matching interface then we * neither assign one ourselves nor ask the driver to. */ - if (unlikely(!info->control.vif)) + if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) return TX_CONTINUE; if (unlikely(ieee80211_is_ctl(hdr->frame_control))) @@ -696,7 +700,6 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) /* for pure STA mode without beacons, we can do it */ hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); tx->sdata->sequence_number += 0x10; - tx->sdata->sequence_number &= IEEE80211_SCTL_SEQ; return TX_CONTINUE; } @@ -754,9 +757,7 @@ static int ieee80211_fragment(struct ieee80211_local *local, memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); skb_copy_queue_mapping(tmp, skb); tmp->priority = skb->priority; - tmp->do_not_encrypt = skb->do_not_encrypt; tmp->dev = skb->dev; - tmp->iif = skb->iif; /* copy header and data */ memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); @@ -784,7 +785,7 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) /* * Warn when submitting a fragmented A-MPDU frame and drop it. - * This scenario is handled in __ieee80211_tx_prepare but extra + * This scenario is handled in ieee80211_tx_prepare but extra * caution taken here as fragmented ampdu may cause Tx stop. */ if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) @@ -842,6 +843,23 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) } static ieee80211_tx_result debug_noinline +ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) +{ + struct sk_buff *skb = tx->skb; + + if (!tx->sta) + return TX_CONTINUE; + + tx->sta->tx_packets++; + do { + tx->sta->tx_fragments++; + tx->sta->tx_bytes += skb->len; + } while ((skb = skb->next)); + + return TX_CONTINUE; +} + +static ieee80211_tx_result debug_noinline ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) { if (!tx->key) @@ -885,23 +903,6 @@ ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) return TX_CONTINUE; } -static ieee80211_tx_result debug_noinline -ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) -{ - struct sk_buff *skb = tx->skb; - - if (!tx->sta) - return TX_CONTINUE; - - tx->sta->tx_packets++; - do { - tx->sta->tx_fragments++; - tx->sta->tx_bytes += skb->len; - } while ((skb = skb->next)); - - return TX_CONTINUE; -} - /* actual transmit path */ /* @@ -923,11 +924,12 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, struct ieee80211_radiotap_header *rthdr = (struct ieee80211_radiotap_header *) skb->data; struct ieee80211_supported_band *sband; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len); sband = tx->local->hw.wiphy->bands[tx->channel->band]; - skb->do_not_encrypt = 1; + info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; tx->flags &= ~IEEE80211_TX_FRAGMENTED; /* @@ -965,7 +967,7 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, skb_trim(skb, skb->len - FCS_LEN); } if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) - tx->skb->do_not_encrypt = 0; + info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) tx->flags |= IEEE80211_TX_FRAGMENTED; break; @@ -998,13 +1000,12 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, * initialises @tx */ static ieee80211_tx_result -__ieee80211_tx_prepare(struct ieee80211_tx_data *tx, - struct sk_buff *skb, - struct net_device *dev) +ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, + struct ieee80211_tx_data *tx, + struct sk_buff *skb) { - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_local *local = sdata->local; struct ieee80211_hdr *hdr; - struct ieee80211_sub_if_data *sdata; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int hdrlen, tid; u8 *qc, *state; @@ -1012,9 +1013,9 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx, memset(tx, 0, sizeof(*tx)); tx->skb = skb; - tx->dev = dev; /* use original interface */ + tx->dev = sdata->dev; /* use original interface */ tx->local = local; - tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); + tx->sdata = sdata; tx->channel = local->hw.conf.channel; /* * Set this flag (used below to indicate "automatic fragmentation"), @@ -1023,7 +1024,6 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx, tx->flags |= IEEE80211_TX_FRAGMENTED; /* process and remove the injection radiotap header */ - sdata = IEEE80211_DEV_TO_SUB_IF(dev); if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) { if (!__ieee80211_parse_tx_radiotap(tx, skb)) return TX_DROP; @@ -1075,6 +1075,7 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx, } else if (*state != HT_AGG_STATE_IDLE) { /* in progress */ queued = true; + info->control.vif = &sdata->vif; info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; __skb_queue_tail(&tid_tx->pending, skb); } @@ -1119,50 +1120,29 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx, return TX_CONTINUE; } -/* - * NB: @tx is uninitialised when passed in here - */ -static int ieee80211_tx_prepare(struct ieee80211_local *local, - struct ieee80211_tx_data *tx, - struct sk_buff *skb) -{ - struct net_device *dev; - - dev = dev_get_by_index(&init_net, skb->iif); - if (unlikely(dev && !is_ieee80211_device(local, dev))) { - dev_put(dev); - dev = NULL; - } - if (unlikely(!dev)) - return -ENODEV; - /* - * initialises tx with control - * - * return value is safe to ignore here because this function - * can only be invoked for multicast frames - * - * XXX: clean up - */ - __ieee80211_tx_prepare(tx, skb, dev); - dev_put(dev); - return 0; -} - static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff **skbp, - struct sta_info *sta) + struct sta_info *sta, + bool txpending) { struct sk_buff *skb = *skbp, *next; struct ieee80211_tx_info *info; + struct ieee80211_sub_if_data *sdata; + unsigned long flags; int ret, len; bool fragm = false; - local->mdev->trans_start = jiffies; - while (skb) { - if (ieee80211_queue_stopped(&local->hw, - skb_get_queue_mapping(skb))) - return IEEE80211_TX_PENDING; + int q = skb_get_queue_mapping(skb); + + spin_lock_irqsave(&local->queue_stop_reason_lock, flags); + ret = IEEE80211_TX_OK; + if (local->queue_stop_reasons[q] || + (!txpending && !skb_queue_empty(&local->pending[q]))) + ret = IEEE80211_TX_PENDING; + spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); + if (ret != IEEE80211_TX_OK) + return ret; info = IEEE80211_SKB_CB(skb); @@ -1172,13 +1152,35 @@ static int __ieee80211_tx(struct ieee80211_local *local, next = skb->next; len = skb->len; + + if (next) + info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; + + sdata = vif_to_sdata(info->control.vif); + + switch (sdata->vif.type) { + case NL80211_IFTYPE_MONITOR: + info->control.vif = NULL; + break; + case NL80211_IFTYPE_AP_VLAN: + info->control.vif = &container_of(sdata->bss, + struct ieee80211_sub_if_data, u.ap)->vif; + break; + default: + /* keep */ + break; + } + ret = drv_tx(local, skb); if (WARN_ON(ret != NETDEV_TX_OK && skb->len != len)) { dev_kfree_skb(skb); ret = NETDEV_TX_OK; } - if (ret != NETDEV_TX_OK) + if (ret != NETDEV_TX_OK) { + info->control.vif = &sdata->vif; return IEEE80211_TX_AGAIN; + } + *skbp = skb = next; ieee80211_led_tx(local, 1); fragm = true; @@ -1210,9 +1212,9 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx) CALL_TXH(ieee80211_tx_h_sequence) CALL_TXH(ieee80211_tx_h_fragment) /* handlers after fragment must be aware of tx info fragmentation! */ + CALL_TXH(ieee80211_tx_h_stats) CALL_TXH(ieee80211_tx_h_encrypt) CALL_TXH(ieee80211_tx_h_calculate_duration) - CALL_TXH(ieee80211_tx_h_stats) #undef CALL_TXH txh_done: @@ -1234,10 +1236,10 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx) return 0; } -static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb, - bool txpending) +static void ieee80211_tx(struct ieee80211_sub_if_data *sdata, + struct sk_buff *skb, bool txpending) { - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_local *local = sdata->local; struct ieee80211_tx_data tx; ieee80211_tx_result res_prepare; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); @@ -1248,8 +1250,6 @@ static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb, queue = skb_get_queue_mapping(skb); - WARN_ON(!txpending && !skb_queue_empty(&local->pending[queue])); - if (unlikely(skb->len < 10)) { dev_kfree_skb(skb); return; @@ -1258,7 +1258,7 @@ static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb, rcu_read_lock(); /* initialises tx */ - res_prepare = __ieee80211_tx_prepare(&tx, skb, dev); + res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); if (unlikely(res_prepare == TX_DROP)) { dev_kfree_skb(skb); @@ -1277,7 +1277,7 @@ static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb, retries = 0; retry: - ret = __ieee80211_tx(local, &tx.skb, tx.sta); + ret = __ieee80211_tx(local, &tx.skb, tx.sta, txpending); switch (ret) { case IEEE80211_TX_OK: break; @@ -1295,34 +1295,35 @@ static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb, spin_lock_irqsave(&local->queue_stop_reason_lock, flags); - if (__netif_subqueue_stopped(local->mdev, queue)) { + if (local->queue_stop_reasons[queue] || + !skb_queue_empty(&local->pending[queue])) { + /* + * if queue is stopped, queue up frames for later + * transmission from the tasklet + */ do { next = skb->next; skb->next = NULL; if (unlikely(txpending)) - skb_queue_head(&local->pending[queue], - skb); + __skb_queue_head(&local->pending[queue], + skb); else - skb_queue_tail(&local->pending[queue], - skb); + __skb_queue_tail(&local->pending[queue], + skb); } while ((skb = next)); - /* - * Make sure nobody will enable the queue on us - * (without going through the tasklet) nor disable the - * netdev queue underneath the pending handling code. - */ - __set_bit(IEEE80211_QUEUE_STOP_REASON_PENDING, - &local->queue_stop_reasons[queue]); - spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } else { + /* + * otherwise retry, but this is a race condition or + * a driver bug (which we warn about if it persists) + */ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); retries++; - if (WARN(retries > 10, "tx refused but queue active")) + if (WARN(retries > 10, "tx refused but queue active\n")) goto drop; goto retry; } @@ -1383,44 +1384,25 @@ static int ieee80211_skb_resize(struct ieee80211_local *local, return 0; } -int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev) +static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, + struct sk_buff *skb) { - struct ieee80211_master_priv *mpriv = netdev_priv(dev); - struct ieee80211_local *local = mpriv->local; + struct ieee80211_local *local = sdata->local; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - struct net_device *odev = NULL; - struct ieee80211_sub_if_data *osdata; + struct ieee80211_sub_if_data *tmp_sdata; int headroom; bool may_encrypt; - enum { - NOT_MONITOR, - FOUND_SDATA, - UNKNOWN_ADDRESS, - } monitor_iface = NOT_MONITOR; - - if (skb->iif) - odev = dev_get_by_index(&init_net, skb->iif); - if (unlikely(odev && !is_ieee80211_device(local, odev))) { - dev_put(odev); - odev = NULL; - } - if (unlikely(!odev)) { -#ifdef CONFIG_MAC80211_VERBOSE_DEBUG - printk(KERN_DEBUG "%s: Discarded packet with nonexistent " - "originating device\n", dev->name); -#endif - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } + + dev_hold(sdata->dev); if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && local->hw.conf.dynamic_ps_timeout > 0 && - !local->sw_scanning && !local->hw_scanning && local->ps_sdata) { + !(local->scanning) && local->ps_sdata) { if (local->hw.conf.flags & IEEE80211_CONF_PS) { ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_QUEUE_STOP_REASON_PS); - queue_work(local->hw.workqueue, + ieee80211_queue_work(&local->hw, &local->dynamic_ps_disable_work); } @@ -1428,31 +1410,13 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev) msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); } - memset(info, 0, sizeof(*info)); - info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; - osdata = IEEE80211_DEV_TO_SUB_IF(odev); - - if (ieee80211_vif_is_mesh(&osdata->vif) && - ieee80211_is_data(hdr->frame_control)) { - if (is_multicast_ether_addr(hdr->addr3)) - memcpy(hdr->addr1, hdr->addr3, ETH_ALEN); - else - if (mesh_nexthop_lookup(skb, osdata)) { - dev_put(odev); - return NETDEV_TX_OK; - } - if (memcmp(odev->dev_addr, hdr->addr4, ETH_ALEN) != 0) - IEEE80211_IFSTA_MESH_CTR_INC(&osdata->u.mesh, - fwded_frames); - } else if (unlikely(osdata->vif.type == NL80211_IFTYPE_MONITOR)) { - struct ieee80211_sub_if_data *sdata; + if (unlikely(sdata->vif.type == NL80211_IFTYPE_MONITOR)) { int hdrlen; u16 len_rthdr; info->flags |= IEEE80211_TX_CTL_INJECTED; - monitor_iface = UNKNOWN_ADDRESS; len_rthdr = ieee80211_get_radiotap_len(skb->data); hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); @@ -1471,20 +1435,17 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev) */ rcu_read_lock(); - list_for_each_entry_rcu(sdata, &local->interfaces, + list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { - if (!netif_running(sdata->dev)) + if (!netif_running(tmp_sdata->dev)) continue; - if (sdata->vif.type != NL80211_IFTYPE_AP) + if (tmp_sdata->vif.type != NL80211_IFTYPE_AP) continue; - if (compare_ether_addr(sdata->dev->dev_addr, + if (compare_ether_addr(tmp_sdata->dev->dev_addr, hdr->addr2)) { - dev_hold(sdata->dev); - dev_put(odev); - osdata = sdata; - odev = osdata->dev; - skb->iif = sdata->dev->ifindex; - monitor_iface = FOUND_SDATA; + dev_hold(tmp_sdata->dev); + dev_put(sdata->dev); + sdata = tmp_sdata; break; } } @@ -1492,40 +1453,44 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev) } } - may_encrypt = !skb->do_not_encrypt; + may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); - headroom = osdata->local->tx_headroom; + headroom = local->tx_headroom; if (may_encrypt) headroom += IEEE80211_ENCRYPT_HEADROOM; headroom -= skb_headroom(skb); headroom = max_t(int, 0, headroom); - if (ieee80211_skb_resize(osdata->local, skb, headroom, may_encrypt)) { + if (ieee80211_skb_resize(local, skb, headroom, may_encrypt)) { dev_kfree_skb(skb); - dev_put(odev); - return NETDEV_TX_OK; + dev_put(sdata->dev); + return; } - if (osdata->vif.type == NL80211_IFTYPE_AP_VLAN) - osdata = container_of(osdata->bss, - struct ieee80211_sub_if_data, - u.ap); - if (likely(monitor_iface != UNKNOWN_ADDRESS)) - info->control.vif = &osdata->vif; + info->control.vif = &sdata->vif; - ieee80211_tx(odev, skb, false); - dev_put(odev); + if (ieee80211_vif_is_mesh(&sdata->vif) && + ieee80211_is_data(hdr->frame_control) && + !is_multicast_ether_addr(hdr->addr1)) + if (mesh_nexthop_lookup(skb, sdata)) { + /* skb queued: don't free */ + dev_put(sdata->dev); + return; + } - return NETDEV_TX_OK; + ieee80211_select_queue(local, skb); + ieee80211_tx(sdata, skb, false); + dev_put(sdata->dev); } -int ieee80211_monitor_start_xmit(struct sk_buff *skb, - struct net_device *dev) +netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, + struct net_device *dev) { struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_channel *chan = local->hw.conf.channel; struct ieee80211_radiotap_header *prthdr = (struct ieee80211_radiotap_header *)skb->data; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); u16 len_rthdr; /* @@ -1563,15 +1528,6 @@ int ieee80211_monitor_start_xmit(struct sk_buff *skb, if (unlikely(skb->len < len_rthdr)) goto fail; /* skb too short for claimed rt header extent */ - skb->dev = local->mdev; - - /* needed because we set skb device to master */ - skb->iif = dev->ifindex; - - /* sometimes we do encrypt injected frames, will be fixed - * up in radiotap parser if not wanted */ - skb->do_not_encrypt = 0; - /* * fix up the pointers accounting for the radiotap * header still being in there. We are being given @@ -1586,8 +1542,10 @@ int ieee80211_monitor_start_xmit(struct sk_buff *skb, skb_set_network_header(skb, len_rthdr); skb_set_transport_header(skb, len_rthdr); - /* pass the radiotap header up to the next stage intact */ - dev_queue_xmit(skb); + memset(info, 0, sizeof(*info)); + + /* pass the radiotap header up to xmit */ + ieee80211_xmit(IEEE80211_DEV_TO_SUB_IF(dev), skb); return NETDEV_TX_OK; fail: @@ -1610,11 +1568,12 @@ fail: * encapsulated packet will then be passed to master interface, wlan#.11, for * transmission (through low-level driver). */ -int ieee80211_subif_start_xmit(struct sk_buff *skb, - struct net_device *dev) +netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, + struct net_device *dev) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int ret = NETDEV_TX_BUSY, head_need; u16 ethertype, hdrlen, meshhdrlen = 0; __le16 fc; @@ -1627,7 +1586,7 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, u32 sta_flags = 0; if (unlikely(skb->len < ETH_HLEN)) { - ret = 0; + ret = NETDEV_TX_OK; goto fail; } @@ -1660,52 +1619,58 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, break; #ifdef CONFIG_MAC80211_MESH case NL80211_IFTYPE_MESH_POINT: - fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { /* Do not send frames with mesh_ttl == 0 */ sdata->u.mesh.mshstats.dropped_frames_ttl++; - ret = 0; + ret = NETDEV_TX_OK; goto fail; } - memset(&mesh_hdr, 0, sizeof(mesh_hdr)); if (compare_ether_addr(dev->dev_addr, skb->data + ETH_ALEN) == 0) { - /* RA TA DA SA */ - memset(hdr.addr1, 0, ETH_ALEN); - memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); - memcpy(hdr.addr3, skb->data, ETH_ALEN); - memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); - meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, sdata); + hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, + skb->data, skb->data + ETH_ALEN); + meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, + sdata, NULL, NULL, NULL); } else { /* packet from other interface */ struct mesh_path *mppath; + int is_mesh_mcast = 1; + char *mesh_da; - memset(hdr.addr1, 0, ETH_ALEN); - memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); - memcpy(hdr.addr4, dev->dev_addr, ETH_ALEN); - + rcu_read_lock(); if (is_multicast_ether_addr(skb->data)) - memcpy(hdr.addr3, skb->data, ETH_ALEN); + /* DA TA mSA AE:SA */ + mesh_da = skb->data; else { - rcu_read_lock(); mppath = mpp_path_lookup(skb->data, sdata); - if (mppath) - memcpy(hdr.addr3, mppath->mpp, ETH_ALEN); - else - memset(hdr.addr3, 0xff, ETH_ALEN); - rcu_read_unlock(); + if (mppath) { + /* RA TA mDA mSA AE:DA SA */ + mesh_da = mppath->mpp; + is_mesh_mcast = 0; + } else + /* DA TA mSA AE:SA */ + mesh_da = dev->broadcast; } + hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, + mesh_da, dev->dev_addr); + rcu_read_unlock(); + if (is_mesh_mcast) + meshhdrlen = + ieee80211_new_mesh_header(&mesh_hdr, + sdata, + skb->data + ETH_ALEN, + NULL, + NULL); + else + meshhdrlen = + ieee80211_new_mesh_header(&mesh_hdr, + sdata, + NULL, + skb->data, + skb->data + ETH_ALEN); - mesh_hdr.flags |= MESH_FLAGS_AE_A5_A6; - mesh_hdr.ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; - put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &mesh_hdr.seqnum); - memcpy(mesh_hdr.eaddr1, skb->data, ETH_ALEN); - memcpy(mesh_hdr.eaddr2, skb->data + ETH_ALEN, ETH_ALEN); - sdata->u.mesh.mesh_seqnum++; - meshhdrlen = 18; } - hdrlen = 30; break; #endif case NL80211_IFTYPE_STATION: @@ -1724,7 +1689,7 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, hdrlen = 24; break; default: - ret = 0; + ret = NETDEV_TX_OK; goto fail; } @@ -1766,7 +1731,7 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); - ret = 0; + ret = NETDEV_TX_OK; goto fail; } @@ -1842,9 +1807,6 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, nh_pos += hdrlen; h_pos += hdrlen; - skb->iif = dev->ifindex; - - skb->dev = local->mdev; dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; @@ -1855,13 +1817,15 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, skb_set_network_header(skb, nh_pos); skb_set_transport_header(skb, h_pos); + memset(info, 0, sizeof(*info)); + dev->trans_start = jiffies; - dev_queue_xmit(skb); + ieee80211_xmit(sdata, skb); - return 0; + return NETDEV_TX_OK; fail: - if (!ret) + if (ret == NETDEV_TX_OK) dev_kfree_skb(skb); return ret; @@ -1887,101 +1851,74 @@ static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata; struct sta_info *sta; struct ieee80211_hdr *hdr; - struct net_device *dev; int ret; bool result = true; - /* does interface still exist? */ - dev = dev_get_by_index(&init_net, skb->iif); - if (!dev) { - dev_kfree_skb(skb); - return true; - } - - /* validate info->control.vif against skb->iif */ - sdata = IEEE80211_DEV_TO_SUB_IF(dev); - if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) - sdata = container_of(sdata->bss, - struct ieee80211_sub_if_data, - u.ap); - - if (unlikely(info->control.vif && info->control.vif != &sdata->vif)) { - dev_kfree_skb(skb); - result = true; - goto out; - } + sdata = vif_to_sdata(info->control.vif); if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { - ieee80211_tx(dev, skb, true); + ieee80211_tx(sdata, skb, true); } else { hdr = (struct ieee80211_hdr *)skb->data; sta = sta_info_get(local, hdr->addr1); - ret = __ieee80211_tx(local, &skb, sta); + ret = __ieee80211_tx(local, &skb, sta, true); if (ret != IEEE80211_TX_OK) result = false; } - out: - dev_put(dev); - return result; } /* - * Transmit all pending packets. Called from tasklet, locks master device - * TX lock so that no new packets can come in. + * Transmit all pending packets. Called from tasklet. */ void ieee80211_tx_pending(unsigned long data) { struct ieee80211_local *local = (struct ieee80211_local *)data; - struct net_device *dev = local->mdev; unsigned long flags; int i; - bool next; + bool txok; rcu_read_lock(); - netif_tx_lock_bh(dev); + spin_lock_irqsave(&local->queue_stop_reason_lock, flags); for (i = 0; i < local->hw.queues; i++) { /* * If queue is stopped by something other than due to pending * frames, or we have no pending frames, proceed to next queue. */ - spin_lock_irqsave(&local->queue_stop_reason_lock, flags); - next = false; - if (local->queue_stop_reasons[i] != - BIT(IEEE80211_QUEUE_STOP_REASON_PENDING) || + if (local->queue_stop_reasons[i] || skb_queue_empty(&local->pending[i])) - next = true; - spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); - - if (next) continue; - /* - * start the queue now to allow processing our packets, - * we're under the tx lock here anyway so nothing will - * happen as a result of this - */ - netif_start_subqueue(local->mdev, i); - while (!skb_queue_empty(&local->pending[i])) { - struct sk_buff *skb = skb_dequeue(&local->pending[i]); + struct sk_buff *skb = __skb_dequeue(&local->pending[i]); + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_sub_if_data *sdata; - if (!ieee80211_tx_pending_skb(local, skb)) { - skb_queue_head(&local->pending[i], skb); - break; + if (WARN_ON(!info->control.vif)) { + kfree_skb(skb); + continue; } - } - /* Start regular packet processing again. */ - if (skb_queue_empty(&local->pending[i])) - ieee80211_wake_queue_by_reason(&local->hw, i, - IEEE80211_QUEUE_STOP_REASON_PENDING); + sdata = vif_to_sdata(info->control.vif); + dev_hold(sdata->dev); + spin_unlock_irqrestore(&local->queue_stop_reason_lock, + flags); + + txok = ieee80211_tx_pending_skb(local, skb); + dev_put(sdata->dev); + if (!txok) + __skb_queue_head(&local->pending[i], skb); + spin_lock_irqsave(&local->queue_stop_reason_lock, + flags); + if (!txok) + break; + } } + spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); - netif_tx_unlock_bh(dev); rcu_read_unlock(); } @@ -2156,8 +2093,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, info = IEEE80211_SKB_CB(skb); - skb->do_not_encrypt = 1; - + info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; info->band = band; /* * XXX: For now, always use the lowest rate @@ -2228,9 +2164,6 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, sdata = vif_to_sdata(vif); bss = &sdata->u.ap; - if (!bss) - return NULL; - rcu_read_lock(); beacon = rcu_dereference(bss->beacon); @@ -2256,7 +2189,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, cpu_to_le16(IEEE80211_FCTL_MOREDATA); } - if (!ieee80211_tx_prepare(local, &tx, skb)) + if (!ieee80211_tx_prepare(sdata, &tx, skb)) break; dev_kfree_skb_any(skb); } @@ -2276,3 +2209,24 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, return skb; } EXPORT_SYMBOL(ieee80211_get_buffered_bc); + +void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, + int encrypt) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + skb_set_mac_header(skb, 0); + skb_set_network_header(skb, 0); + skb_set_transport_header(skb, 0); + + if (!encrypt) + info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; + + /* + * The other path calling ieee80211_xmit is from the tasklet, + * and while we can handle concurrent transmissions locking + * requirements are that we do not come into tx with bhs on. + */ + local_bh_disable(); + ieee80211_xmit(sdata, skb); + local_bh_enable(); +} |