--- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -4418,6 +4418,22 @@ static inline void ieee80211_rx_ni(struc } /** + * ieee80211_rx_decap_offl - Receive frames in 802.11 decapsulated format + * + * Low level driver capable of 802.11 header decap uses this function. The frame + * will be in ethernet format. + * This function may not be called in IRQ context. Calls to this function + * for a single hardware must be synchronized against each other. + * + * @hw: the hardware this frame came in on + * @sta : the station the frame was received from, must not be %NULL + * @skb: the buffer to receive, owned by mac80211 after this call + * @napi: the NAPI context + */ +void ieee80211_rx_decap_offl(struct ieee80211_hw *hw, struct ieee80211_sta *sta, + struct sk_buff *skb, struct napi_struct *napi); + +/** * ieee80211_sta_ps_transition - PS transition for connected sta * * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2465,13 +2465,15 @@ __ieee80211_data_to_8023(struct ieee8021 return 0; } +static const u8 pae_group_addr[ETH_ALEN] __aligned(2) + = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; + + /* * requires that rx->skb is a frame with ethernet header */ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) { - static const u8 pae_group_addr[ETH_ALEN] __aligned(2) - = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; /* @@ -2527,6 +2529,7 @@ ieee80211_deliver_skb(struct ieee80211_r struct sk_buff *skb, *xmit_skb; struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; struct sta_info *dsta; + struct ieee80211_sta_rx_stats *rx_stats; skb = rx->skb; xmit_skb = NULL; @@ -2539,9 +2542,12 @@ ieee80211_deliver_skb(struct ieee80211_r * for non-QoS-data frames. Here we know it's a data * frame, so count MSDUs. */ - u64_stats_update_begin(&rx->sta->rx_stats.syncp); - rx->sta->rx_stats.msdu[rx->seqno_idx]++; - u64_stats_update_end(&rx->sta->rx_stats.syncp); + rx_stats = &rx->sta->rx_stats; + if (ieee80211_hw_check(&rx->local->hw, USES_RSS)) + rx_stats = this_cpu_ptr(rx->sta->pcpu_rx_stats); + u64_stats_update_begin(&rx_stats->syncp); + rx_stats->msdu[rx->seqno_idx]++; + u64_stats_update_end(&rx_stats->syncp); } if ((sdata->vif.type == NL80211_IFTYPE_AP || @@ -4714,3 +4720,211 @@ void ieee80211_rx_irqsafe(struct ieee802 tasklet_schedule(&local->tasklet); } EXPORT_SYMBOL(ieee80211_rx_irqsafe); + +/* Receive path for decap offloaded data frames */ + +static void +ieee80211_rx_handle_decap_offl(struct ieee80211_sub_if_data *sdata, + struct sta_info *sta, struct sk_buff *skb, + struct napi_struct *napi) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_vif *vif = &sdata->vif; + struct net_device *dev = sdata->dev; + struct ieee80211_rx_status *status; + struct ieee80211_key *key = NULL; + struct ieee80211_rx_data rx; + int i; + struct ethhdr *ehdr; + struct ieee80211_sta_rx_stats *stats = &sta->rx_stats; + struct ieee80211_supported_band *sband; + + ehdr = (struct ethhdr *)skb->data; + status = IEEE80211_SKB_RXCB(skb); + + if (WARN_ON(status->band >= NUM_NL80211_BANDS)) + goto drop; + + sband = local->hw.wiphy->bands[status->band]; + if (WARN_ON(!sband)) + goto drop; + + if (ieee80211_hw_check(&local->hw, USES_RSS)) + stats = this_cpu_ptr(sta->pcpu_rx_stats); + + /* TODO: Extend ieee80211_rx_decap_offl() with bssid so that Ethernet + * encap/decap can be supported in Adhoc interface type as well. + * Adhoc interface depends on bssid to udpate last_rx. + */ + if (vif->type != NL80211_IFTYPE_STATION && + vif->type != NL80211_IFTYPE_AP_VLAN && + vif->type != NL80211_IFTYPE_AP) + goto drop; + + I802_DEBUG_INC(local->dot11ReceivedFragmentCount); + + if (!is_multicast_ether_addr(ehdr->h_dest)) { + stats->last_rx = jiffies; + stats->last_rate = sta_stats_encode_rate(status); + } + + if (sdata->vif.type == NL80211_IFTYPE_STATION && + !is_multicast_ether_addr(ehdr->h_dest)) + ieee80211_sta_reset_conn_monitor(sdata); + + stats->fragments++; + + u64_stats_update_begin(&stats->syncp); + stats->bytes += skb->len; + u64_stats_update_end(&stats->syncp); + + if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { + stats->last_signal = status->signal; + if (!ieee80211_hw_check(&local->hw, USES_RSS)) + ewma_signal_add(&sta->rx_stats_avg.signal, + -status->signal); + } + + if (status->chains) { + stats->chains = status->chains; + for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { + int signal = status->chain_signal[i]; + + if (!(status->chains & BIT(i))) + continue; + + stats->chain_signal_last[i] = signal; + if (!ieee80211_hw_check(&local->hw, USES_RSS)) + ewma_signal_add(&sta->rx_stats_avg.chain_signal[i], + -signal); + } + } + + if (is_multicast_ether_addr(ehdr->h_dest)) { + for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + key = rcu_dereference(sta->gtk[i]); + if (key) + break; + } + } else { + key = rcu_dereference(sta->ptk[sta->ptk_idx]); + } + + if (status->flag & RX_FLAG_MMIC_ERROR) { + if (key) + key->u.tkip.mic_failures++; + goto mic_fail; + } + + if (!(status->flag & RX_FLAG_DUP_VALIDATED)) + goto drop; + +#define ETH_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED) + + if (key && (status->flag & ETH_RX_CRYPT_FLAGS) != ETH_RX_CRYPT_FLAGS) + goto drop; + + if (key && unlikely(key->flags & KEY_FLAG_TAINTED)) + goto drop; + + if (unlikely(!test_sta_flag(sta, WLAN_STA_AUTHORIZED))) { + if (ehdr->h_proto != sdata->control_port_protocol) + goto drop; + else if (!ether_addr_equal(ehdr->h_dest, vif->addr) && + !ether_addr_equal(ehdr->h_dest, pae_group_addr)) + goto drop; + } + + if (unlikely(ehdr->h_proto == cpu_to_be16(ETH_P_TDLS))) { + struct ieee80211_tdls_data *tf = (void *)skb->data; + + if (pskb_may_pull(skb, + offsetof(struct ieee80211_tdls_data, u)) && + tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && + tf->category == WLAN_CATEGORY_TDLS && + (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST || + tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) { + skb_queue_tail(&local->skb_queue_tdls_chsw, skb); + schedule_work(&local->tdls_chsw_work); + stats->packets++; + return; + } + } + + memset(&rx, 0, sizeof(rx)); + rx.skb = skb; + rx.sdata = sdata; + rx.local = local; + rx.sta = sta; + rx.napi = napi; + + if (vif->type == NL80211_IFTYPE_AP_VLAN && sdata->bss && + unlikely(ehdr->h_proto == sdata->control_port_protocol)) { + sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, + u.ap); + dev = sdata->dev; + rx.sdata = sdata; + } + + rx.skb->dev = dev; + + /* XXX: Since rx.seqno_idx is not available for decap offloaded frames + * rx msdu stats update at the seqno_idx in ieee80211_deliver_skb() + * will always be updated at index 0 and will not be very useful. + */ + ieee80211_deliver_skb(&rx); + + return; + +mic_fail: + + cfg80211_michael_mic_failure(sdata->dev, sta->addr, + is_multicast_ether_addr(ehdr->h_dest) ? + NL80211_KEYTYPE_GROUP : + NL80211_KEYTYPE_PAIRWISE, + key ? key->conf.keyidx : -1, + NULL, GFP_ATOMIC); + +drop: + stats->dropped++; + dev_kfree_skb(skb); +} + +/* Receive path handler that a low level driver supporting 802.11 hdr decap + * offload can call. The frame is in ethernet format and the assumption is + * all necessary operations like decryption, defrag, deaggregation, etc. + * requiring 802.11 headers are already performed in the low level driver + * or hardware. + */ +void ieee80211_rx_decap_offl(struct ieee80211_hw *hw, + struct ieee80211_sta *pubsta, struct sk_buff *skb, + struct napi_struct *napi) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct sta_info *sta; + + if (unlikely(local->quiescing || local->suspended)) + goto drop; + + if (unlikely(local->in_reconfig)) + goto drop; + + if (WARN_ON(!local->started)) + goto drop; + + if (!pubsta) + goto drop; + + sta = container_of(pubsta, struct sta_info, sta); + + /* TODO: Toggle Rx throughput LED */ + + rcu_read_lock(); + ieee80211_rx_handle_decap_offl(sta->sdata, sta, skb, napi); + rcu_read_unlock(); + + return; +drop: + kfree_skb(skb); +} +EXPORT_SYMBOL(ieee80211_rx_decap_offl); --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -2089,6 +2089,9 @@ sta_get_last_rx_stats(struct sta_info *s cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu); + if(!cpustats->last_rx) + continue; + if (time_after(cpustats->last_rx, stats->last_rx)) stats = cpustats; }