else if (status->flag & RX_FLAG_5MHZ)
channel_flags |= IEEE80211_CHAN_QUARTER;
- if (status->band == IEEE80211_BAND_5GHZ)
+ if (status->band == NL80211_BAND_5GHZ)
channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ;
else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
}
EXPORT_SYMBOL(ieee80211_sta_ps_transition);
+void ieee80211_sta_pspoll(struct ieee80211_sta *pubsta)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ if (test_sta_flag(sta, WLAN_STA_SP))
+ return;
+
+ if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
+ ieee80211_sta_ps_deliver_poll_response(sta);
+ else
+ set_sta_flag(sta, WLAN_STA_PSPOLL);
+}
+EXPORT_SYMBOL(ieee80211_sta_pspoll);
+
+void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *pubsta, u8 tid)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+ u8 ac = ieee802_1d_to_ac[tid & 7];
+
+ /*
+ * If this AC is not trigger-enabled do nothing.
+ *
+ * NB: This could/should check a separate bitmap of trigger-
+ * enabled queues, but for now we only implement uAPSD w/o
+ * TSPEC changes to the ACs, so they're always the same.
+ */
+ if (!(sta->sta.uapsd_queues & BIT(ac)))
+ return;
+
+ /* if we are in a service period, do nothing */
+ if (test_sta_flag(sta, WLAN_STA_SP))
+ return;
+
+ if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
+ ieee80211_sta_ps_deliver_uapsd(sta);
+ else
+ set_sta_flag(sta, WLAN_STA_UAPSD);
+}
+EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger);
+
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
{
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_hdr *hdr = (void *)rx->skb->data;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
- int tid, ac;
if (!rx->sta)
return RX_CONTINUE;
return RX_CONTINUE;
if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
- if (!test_sta_flag(rx->sta, WLAN_STA_SP)) {
- if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
- ieee80211_sta_ps_deliver_poll_response(rx->sta);
- else
- set_sta_flag(rx->sta, WLAN_STA_PSPOLL);
- }
+ ieee80211_sta_pspoll(&rx->sta->sta);
/* Free PS Poll skb here instead of returning RX_DROP that would
* count as an dropped frame. */
ieee80211_has_pm(hdr->frame_control) &&
(ieee80211_is_data_qos(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control))) {
- tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
- ac = ieee802_1d_to_ac[tid & 7];
-
- /*
- * If this AC is not trigger-enabled do nothing.
- *
- * NB: This could/should check a separate bitmap of trigger-
- * enabled queues, but for now we only implement uAPSD w/o
- * TSPEC changes to the ACs, so they're always the same.
- */
- if (!(rx->sta->sta.uapsd_queues & BIT(ac)))
- return RX_CONTINUE;
+ u8 tid;
- /* if we are in a service period, do nothing */
- if (test_sta_flag(rx->sta, WLAN_STA_SP))
- return RX_CONTINUE;
+ tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
- if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
- ieee80211_sta_ps_deliver_uapsd(rx->sta);
- else
- set_sta_flag(rx->sta, WLAN_STA_UAPSD);
+ ieee80211_sta_uapsd_trigger(&rx->sta->sta, tid);
}
return RX_CONTINUE;
test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
sta->rx_stats.last_rx = jiffies;
if (ieee80211_is_data(hdr->frame_control) &&
- !is_multicast_ether_addr(hdr->addr1)) {
- sta->rx_stats.last_rate_idx =
- status->rate_idx;
- sta->rx_stats.last_rate_flag =
- status->flag;
- sta->rx_stats.last_rate_vht_flag =
- status->vht_flag;
- sta->rx_stats.last_rate_vht_nss =
- status->vht_nss;
- }
+ !is_multicast_ether_addr(hdr->addr1))
+ sta->rx_stats.last_rate =
+ sta_stats_encode_rate(status);
}
} else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) {
sta->rx_stats.last_rx = jiffies;
* match the current local configuration when processed.
*/
sta->rx_stats.last_rx = jiffies;
- if (ieee80211_is_data(hdr->frame_control)) {
- sta->rx_stats.last_rate_idx = status->rate_idx;
- sta->rx_stats.last_rate_flag = status->flag;
- sta->rx_stats.last_rate_vht_flag = status->vht_flag;
- sta->rx_stats.last_rate_vht_nss = status->vht_nss;
- }
+ if (ieee80211_is_data(hdr->frame_control))
+ sta->rx_stats.last_rate = sta_stats_encode_rate(status);
}
if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
ieee80211_sta_rx_notify(rx->sdata, hdr);
sta->rx_stats.fragments++;
+
+ u64_stats_update_begin(&rx->sta->rx_stats.syncp);
sta->rx_stats.bytes += rx->skb->len;
+ u64_stats_update_end(&rx->sta->rx_stats.syncp);
+
if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
sta->rx_stats.last_signal = status->signal;
ewma_signal_add(&sta->rx_stats_avg.signal, -status->signal);
* 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);
}
if ((sdata->vif.type == NL80211_IFTYPE_AP ||
switch (mgmt->u.action.u.measurement.action_code) {
case WLAN_ACTION_SPCT_MSR_REQ:
- if (status->band != IEEE80211_BAND_5GHZ)
+ if (status->band != NL80211_BAND_5GHZ)
break;
if (len < (IEEE80211_MIN_ACTION_SIZE +
return false;
}
+void ieee80211_check_fast_rx(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_key *key;
+ struct ieee80211_fast_rx fastrx = {
+ .dev = sdata->dev,
+ .vif_type = sdata->vif.type,
+ .control_port_protocol = sdata->control_port_protocol,
+ }, *old, *new = NULL;
+ bool assign = false;
+
+ /* use sparse to check that we don't return without updating */
+ __acquire(check_fast_rx);
+
+ BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != sizeof(rfc1042_header));
+ BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != ETH_ALEN);
+ ether_addr_copy(fastrx.rfc1042_hdr, rfc1042_header);
+ ether_addr_copy(fastrx.vif_addr, sdata->vif.addr);
+
+ fastrx.uses_rss = ieee80211_hw_check(&local->hw, USES_RSS);
+
+ /* fast-rx doesn't do reordering */
+ if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
+ !ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER))
+ goto clear;
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ /* 4-addr is harder to deal with, later maybe */
+ if (sdata->u.mgd.use_4addr)
+ goto clear;
+ /* software powersave is a huge mess, avoid all of it */
+ if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
+ goto clear;
+ if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
+ !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
+ goto clear;
+ if (sta->sta.tdls) {
+ fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
+ fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
+ fastrx.expected_ds_bits = 0;
+ } else {
+ fastrx.sta_notify = sdata->u.mgd.probe_send_count > 0;
+ fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
+ fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr3);
+ fastrx.expected_ds_bits =
+ cpu_to_le16(IEEE80211_FCTL_FROMDS);
+ }
+ break;
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_AP:
+ /* parallel-rx requires this, at least with calls to
+ * ieee80211_sta_ps_transition()
+ */
+ if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
+ goto clear;
+ fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3);
+ fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
+ fastrx.expected_ds_bits = cpu_to_le16(IEEE80211_FCTL_TODS);
+
+ fastrx.internal_forward =
+ !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
+ (sdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
+ !sdata->u.vlan.sta);
+ break;
+ default:
+ goto clear;
+ }
+
+ if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+ goto clear;
+
+ rcu_read_lock();
+ key = rcu_dereference(sta->ptk[sta->ptk_idx]);
+ if (key) {
+ switch (key->conf.cipher) {
+ case WLAN_CIPHER_SUITE_TKIP:
+ /* we don't want to deal with MMIC in fast-rx */
+ goto clear_rcu;
+ case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
+ case WLAN_CIPHER_SUITE_GCMP:
+ case WLAN_CIPHER_SUITE_GCMP_256:
+ break;
+ default:
+ /* we also don't want to deal with WEP or cipher scheme
+ * since those require looking up the key idx in the
+ * frame, rather than assuming the PTK is used
+ * (we need to revisit this once we implement the real
+ * PTK index, which is now valid in the spec, but we
+ * haven't implemented that part yet)
+ */
+ goto clear_rcu;
+ }
+
+ fastrx.key = true;
+ fastrx.icv_len = key->conf.icv_len;
+ }
+
+ assign = true;
+ clear_rcu:
+ rcu_read_unlock();
+ clear:
+ __release(check_fast_rx);
+
+ if (assign)
+ new = kmemdup(&fastrx, sizeof(fastrx), GFP_KERNEL);
+
+ spin_lock_bh(&sta->lock);
+ old = rcu_dereference_protected(sta->fast_rx, true);
+ rcu_assign_pointer(sta->fast_rx, new);
+ spin_unlock_bh(&sta->lock);
+
+ if (old)
+ kfree_rcu(old, rcu_head);
+}
+
+void ieee80211_clear_fast_rx(struct sta_info *sta)
+{
+ struct ieee80211_fast_rx *old;
+
+ spin_lock_bh(&sta->lock);
+ old = rcu_dereference_protected(sta->fast_rx, true);
+ RCU_INIT_POINTER(sta->fast_rx, NULL);
+ spin_unlock_bh(&sta->lock);
+
+ if (old)
+ kfree_rcu(old, rcu_head);
+}
+
+void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta;
+
+ lockdep_assert_held(&local->sta_mtx);
+
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ if (sdata != sta->sdata &&
+ (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
+ continue;
+ ieee80211_check_fast_rx(sta);
+ }
+}
+
+void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+
+ mutex_lock(&local->sta_mtx);
+ __ieee80211_check_fast_rx_iface(sdata);
+ mutex_unlock(&local->sta_mtx);
+}
+
+static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
+ struct ieee80211_fast_rx *fast_rx)
+{
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+ struct sta_info *sta = rx->sta;
+ int orig_len = skb->len;
+ int snap_offs = ieee80211_hdrlen(hdr->frame_control);
+ struct {
+ u8 snap[sizeof(rfc1042_header)];
+ __be16 proto;
+ } *payload __aligned(2);
+ struct {
+ u8 da[ETH_ALEN];
+ u8 sa[ETH_ALEN];
+ } addrs __aligned(2);
+ struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
+
+ if (fast_rx->uses_rss)
+ stats = this_cpu_ptr(sta->pcpu_rx_stats);
+
+ /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
+ * to a common data structure; drivers can implement that per queue
+ * but we don't have that information in mac80211
+ */
+ if (!(status->flag & RX_FLAG_DUP_VALIDATED))
+ return false;
+
+#define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
+
+ /* If using encryption, we also need to have:
+ * - PN_VALIDATED: similar, but the implementation is tricky
+ * - DECRYPTED: necessary for PN_VALIDATED
+ */
+ if (fast_rx->key &&
+ (status->flag & FAST_RX_CRYPT_FLAGS) != FAST_RX_CRYPT_FLAGS)
+ return false;
+
+ /* we don't deal with A-MSDU deaggregation here */
+ if (status->rx_flags & IEEE80211_RX_AMSDU)
+ return false;
+
+ if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
+ return false;
+
+ if (unlikely(ieee80211_is_frag(hdr)))
+ return false;
+
+ /* Since our interface address cannot be multicast, this
+ * implicitly also rejects multicast frames without the
+ * explicit check.
+ *
+ * We shouldn't get any *data* frames not addressed to us
+ * (AP mode will accept multicast *management* frames), but
+ * punting here will make it go through the full checks in
+ * ieee80211_accept_frame().
+ */
+ if (!ether_addr_equal(fast_rx->vif_addr, hdr->addr1))
+ return false;
+
+ if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS |
+ IEEE80211_FCTL_TODS)) !=
+ fast_rx->expected_ds_bits)
+ goto drop;
+
+ /* assign the key to drop unencrypted frames (later)
+ * and strip the IV/MIC if necessary
+ */
+ if (fast_rx->key && !(status->flag & RX_FLAG_IV_STRIPPED)) {
+ /* GCMP header length is the same */
+ snap_offs += IEEE80211_CCMP_HDR_LEN;
+ }
+
+ if (!pskb_may_pull(skb, snap_offs + sizeof(*payload)))
+ goto drop;
+ payload = (void *)(skb->data + snap_offs);
+
+ if (!ether_addr_equal(payload->snap, fast_rx->rfc1042_hdr))
+ return false;
+
+ /* Don't handle these here since they require special code.
+ * Accept AARP and IPX even though they should come with a
+ * bridge-tunnel header - but if we get them this way then
+ * there's little point in discarding them.
+ */
+ if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
+ payload->proto == fast_rx->control_port_protocol))
+ return false;
+
+ /* after this point, don't punt to the slowpath! */
+
+ if (rx->key && !(status->flag & RX_FLAG_MIC_STRIPPED) &&
+ pskb_trim(skb, skb->len - fast_rx->icv_len))
+ goto drop;
+
+ if (unlikely(fast_rx->sta_notify)) {
+ ieee80211_sta_rx_notify(rx->sdata, hdr);
+ fast_rx->sta_notify = false;
+ }
+
+ /* statistics part of ieee80211_rx_h_sta_process() */
+ stats->last_rx = jiffies;
+ stats->last_rate = sta_stats_encode_rate(status);
+
+ stats->fragments++;
+
+ if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
+ stats->last_signal = status->signal;
+ if (!fast_rx->uses_rss)
+ ewma_signal_add(&sta->rx_stats_avg.signal,
+ -status->signal);
+ }
+
+ if (status->chains) {
+ int i;
+
+ 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 (!fast_rx->uses_rss)
+ ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
+ -signal);
+ }
+ }
+ /* end of statistics */
+
+ if (rx->key && !ieee80211_has_protected(hdr->frame_control))
+ goto drop;
+
+ /* do the header conversion - first grab the addresses */
+ ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs);
+ ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs);
+ /* remove the SNAP but leave the ethertype */
+ skb_pull(skb, snap_offs + sizeof(rfc1042_header));
+ /* push the addresses in front */
+ memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs));
+
+ skb->dev = fast_rx->dev;
+
+ ieee80211_rx_stats(fast_rx->dev, skb->len);
+
+ /* The seqno index has the same property as needed
+ * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
+ * for non-QoS-data frames. Here we know it's a data
+ * frame, so count MSDUs.
+ */
+ u64_stats_update_begin(&stats->syncp);
+ stats->msdu[rx->seqno_idx]++;
+ stats->bytes += orig_len;
+ u64_stats_update_end(&stats->syncp);
+
+ if (fast_rx->internal_forward) {
+ struct sta_info *dsta = sta_info_get(rx->sdata, skb->data);
+
+ if (dsta) {
+ /*
+ * Send to wireless media and increase priority by 256
+ * to keep the received priority instead of
+ * reclassifying the frame (see cfg80211_classify8021d).
+ */
+ skb->priority += 256;
+ skb->protocol = htons(ETH_P_802_3);
+ skb_reset_network_header(skb);
+ skb_reset_mac_header(skb);
+ dev_queue_xmit(skb);
+ return true;
+ }
+ }
+
+ /* deliver to local stack */
+ skb->protocol = eth_type_trans(skb, fast_rx->dev);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ if (rx->napi)
+ napi_gro_receive(rx->napi, skb);
+ else
+ netif_receive_skb(skb);
+
+ return true;
+ drop:
+ dev_kfree_skb(skb);
+ stats->dropped++;
+ return true;
+}
+
/*
* This function returns whether or not the SKB
* was destined for RX processing or not, which,
rx->skb = skb;
+ /* See if we can do fast-rx; if we have to copy we already lost,
+ * so punt in that case. We should never have to deliver a data
+ * frame to multiple interfaces anyway.
+ *
+ * We skip the ieee80211_accept_frame() call and do the necessary
+ * checking inside ieee80211_invoke_fast_rx().
+ */
+ if (consume && rx->sta) {
+ struct ieee80211_fast_rx *fast_rx;
+
+ fast_rx = rcu_dereference(rx->sta->fast_rx);
+ if (fast_rx && ieee80211_invoke_fast_rx(rx, fast_rx))
+ return true;
+ }
+
if (!ieee80211_accept_frame(rx))
return false;
WARN_ON_ONCE(softirq_count() == 0);
- if (WARN_ON(status->band >= IEEE80211_NUM_BANDS))
+ if (WARN_ON(status->band >= NUM_NL80211_BANDS))
goto drop;
sband = local->hw.wiphy->bands[status->band];
projects / cascardo / linux.git / blobdiff