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openwrt-mirror/package/kernel/mac80211/patches/subsys/327-mac80211-reorganize-code-to-remove-a-forward-declara.patch
Felix Fietkau d717343c85 mac80211: update encap offload patches to the latest version 
Minor cleanup and code reorganization, along with a change to not disable
offload anymore when a tkip or sw crypto key is added

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2020-09-09 11:51:47 +02:00

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From: Felix Fietkau <nbd@nbd.name>
Date: Tue, 8 Sep 2020 12:16:26 +0200
Subject: [PATCH] mac80211: reorganize code to remove a forward
declaration
Remove the newly added ieee80211_set_vif_encap_ops declaration.
No further code changes
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -43,7 +43,6 @@
*/
static void ieee80211_iface_work(struct work_struct *work);
-static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata);
bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
{
@@ -349,6 +348,511 @@ static int ieee80211_check_queues(struct
return 0;
}
+static int ieee80211_open(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ int err;
+
+ /* fail early if user set an invalid address */
+ if (!is_valid_ether_addr(dev->dev_addr))
+ return -EADDRNOTAVAIL;
+
+ err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
+ if (err)
+ return err;
+
+ return ieee80211_do_open(&sdata->wdev, true);
+}
+
+static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
+ bool going_down)
+{
+ struct ieee80211_local *local = sdata->local;
+ unsigned long flags;
+ struct sk_buff *skb, *tmp;
+ u32 hw_reconf_flags = 0;
+ int i, flushed;
+ struct ps_data *ps;
+ struct cfg80211_chan_def chandef;
+ bool cancel_scan;
+ struct cfg80211_nan_func *func;
+
+ clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+
+ cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
+ if (cancel_scan)
+ ieee80211_scan_cancel(local);
+
+ /*
+ * Stop TX on this interface first.
+ */
+ if (sdata->dev)
+ netif_tx_stop_all_queues(sdata->dev);
+
+ ieee80211_roc_purge(local, sdata);
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ ieee80211_mgd_stop(sdata);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ieee80211_ibss_stop(sdata);
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
+ break;
+ list_del_rcu(&sdata->u.mntr.list);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * Remove all stations associated with this interface.
+ *
+ * This must be done before calling ops->remove_interface()
+ * because otherwise we can later invoke ops->sta_notify()
+ * whenever the STAs are removed, and that invalidates driver
+ * assumptions about always getting a vif pointer that is valid
+ * (because if we remove a STA after ops->remove_interface()
+ * the driver will have removed the vif info already!)
+ *
+ * In WDS mode a station must exist here and be flushed, for
+ * AP_VLANs stations may exist since there's nothing else that
+ * would have removed them, but in other modes there shouldn't
+ * be any stations.
+ */
+ flushed = sta_info_flush(sdata);
+ WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+ ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
+ (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
+
+ /* don't count this interface for allmulti while it is down */
+ if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+ atomic_dec(&local->iff_allmultis);
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP) {
+ local->fif_pspoll--;
+ local->fif_probe_req--;
+ } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+ local->fif_probe_req--;
+ }
+
+ if (sdata->dev) {
+ netif_addr_lock_bh(sdata->dev);
+ spin_lock_bh(&local->filter_lock);
+ __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
+ sdata->dev->addr_len);
+ spin_unlock_bh(&local->filter_lock);
+ netif_addr_unlock_bh(sdata->dev);
+ }
+
+ del_timer_sync(&local->dynamic_ps_timer);
+ cancel_work_sync(&local->dynamic_ps_enable_work);
+
+ cancel_work_sync(&sdata->recalc_smps);
+ sdata_lock(sdata);
+ mutex_lock(&local->mtx);
+ sdata->vif.csa_active = false;
+ if (sdata->vif.type == NL80211_IFTYPE_STATION)
+ sdata->u.mgd.csa_waiting_bcn = false;
+ if (sdata->csa_block_tx) {
+ ieee80211_wake_vif_queues(local, sdata,
+ IEEE80211_QUEUE_STOP_REASON_CSA);
+ sdata->csa_block_tx = false;
+ }
+ mutex_unlock(&local->mtx);
+ sdata_unlock(sdata);
+
+ cancel_work_sync(&sdata->csa_finalize_work);
+
+ cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+
+ if (sdata->wdev.cac_started) {
+ chandef = sdata->vif.bss_conf.chandef;
+ WARN_ON(local->suspended);
+ mutex_lock(&local->mtx);
+ ieee80211_vif_release_channel(sdata);
+ mutex_unlock(&local->mtx);
+ cfg80211_cac_event(sdata->dev, &chandef,
+ NL80211_RADAR_CAC_ABORTED,
+ GFP_KERNEL);
+ }
+
+ /* APs need special treatment */
+ if (sdata->vif.type == NL80211_IFTYPE_AP) {
+ struct ieee80211_sub_if_data *vlan, *tmpsdata;
+
+ /* down all dependent devices, that is VLANs */
+ list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
+ u.vlan.list)
+ dev_close(vlan->dev);
+ WARN_ON(!list_empty(&sdata->u.ap.vlans));
+ } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ /* remove all packets in parent bc_buf pointing to this dev */
+ ps = &sdata->bss->ps;
+
+ spin_lock_irqsave(&ps->bc_buf.lock, flags);
+ skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
+ if (skb->dev == sdata->dev) {
+ __skb_unlink(skb, &ps->bc_buf);
+ local->total_ps_buffered--;
+ ieee80211_free_txskb(&local->hw, skb);
+ }
+ }
+ spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
+ }
+
+ if (going_down)
+ local->open_count--;
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP_VLAN:
+ mutex_lock(&local->mtx);
+ list_del(&sdata->u.vlan.list);
+ mutex_unlock(&local->mtx);
+ RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
+ /* see comment in the default case below */
+ ieee80211_free_keys(sdata, true);
+ /* no need to tell driver */
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
+ local->cooked_mntrs--;
+ break;
+ }
+
+ local->monitors--;
+ if (local->monitors == 0) {
+ local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
+ hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+ }
+
+ ieee80211_adjust_monitor_flags(sdata, -1);
+ break;
+ case NL80211_IFTYPE_NAN:
+ /* clean all the functions */
+ spin_lock_bh(&sdata->u.nan.func_lock);
+
+ idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
+ idr_remove(&sdata->u.nan.function_inst_ids, i);
+ cfg80211_free_nan_func(func);
+ }
+ idr_destroy(&sdata->u.nan.function_inst_ids);
+
+ spin_unlock_bh(&sdata->u.nan.func_lock);
+ break;
+ case NL80211_IFTYPE_P2P_DEVICE:
+ /* relies on synchronize_rcu() below */
+ RCU_INIT_POINTER(local->p2p_sdata, NULL);
+ /* fall through */
+ default:
+ cancel_work_sync(&sdata->work);
+ /*
+ * When we get here, the interface is marked down.
+ * Free the remaining keys, if there are any
+ * (which can happen in AP mode if userspace sets
+ * keys before the interface is operating, and maybe
+ * also in WDS mode)
+ *
+ * Force the key freeing to always synchronize_net()
+ * to wait for the RX path in case it is using this
+ * interface enqueuing frames at this very time on
+ * another CPU.
+ */
+ ieee80211_free_keys(sdata, true);
+ skb_queue_purge(&sdata->skb_queue);
+ }
+
+ spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+ for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+ skb_queue_walk_safe(&local->pending[i], skb, tmp) {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ if (info->control.vif == &sdata->vif) {
+ __skb_unlink(skb, &local->pending[i]);
+ ieee80211_free_txskb(&local->hw, skb);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ ieee80211_txq_remove_vlan(local, sdata);
+
+ sdata->bss = NULL;
+
+ if (local->open_count == 0)
+ ieee80211_clear_tx_pending(local);
+
+ sdata->vif.bss_conf.beacon_int = 0;
+
+ /*
+ * If the interface goes down while suspended, presumably because
+ * the device was unplugged and that happens before our resume,
+ * then the driver is already unconfigured and the remainder of
+ * this function isn't needed.
+ * XXX: what about WoWLAN? If the device has software state, e.g.
+ * memory allocated, it might expect teardown commands from
+ * mac80211 here?
+ */
+ if (local->suspended) {
+ WARN_ON(local->wowlan);
+ WARN_ON(rtnl_dereference(local->monitor_sdata));
+ return;
+ }
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP_VLAN:
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (local->monitors == 0)
+ ieee80211_del_virtual_monitor(local);
+
+ mutex_lock(&local->mtx);
+ ieee80211_recalc_idle(local);
+ mutex_unlock(&local->mtx);
+
+ if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ break;
+
+ /* fall through */
+ default:
+ if (going_down)
+ drv_remove_interface(local, sdata);
+ }
+
+ ieee80211_recalc_ps(local);
+
+ if (cancel_scan)
+ flush_delayed_work(&local->scan_work);
+
+ if (local->open_count == 0) {
+ ieee80211_stop_device(local);
+
+ /* no reconfiguring after stop! */
+ return;
+ }
+
+ /* do after stop to avoid reconfiguring when we stop anyway */
+ ieee80211_configure_filter(local);
+ ieee80211_hw_config(local, hw_reconf_flags);
+
+ if (local->monitors == local->open_count)
+ ieee80211_add_virtual_monitor(local);
+}
+
+static int ieee80211_stop(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ ieee80211_do_stop(sdata, true);
+
+ return 0;
+}
+
+static void ieee80211_set_multicast_list(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_local *local = sdata->local;
+ int allmulti, sdata_allmulti;
+
+ allmulti = !!(dev->flags & IFF_ALLMULTI);
+ sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
+
+ if (allmulti != sdata_allmulti) {
+ if (dev->flags & IFF_ALLMULTI)
+ atomic_inc(&local->iff_allmultis);
+ else
+ atomic_dec(&local->iff_allmultis);
+ sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
+ }
+
+ spin_lock_bh(&local->filter_lock);
+ __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
+ spin_unlock_bh(&local->filter_lock);
+ ieee80211_queue_work(&local->hw, &local->reconfig_filter);
+}
+
+/*
+ * Called when the netdev is removed or, by the code below, before
+ * the interface type changes.
+ */
+static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
+{
+ int i;
+
+ /* free extra data */
+ ieee80211_free_keys(sdata, false);
+
+ ieee80211_debugfs_remove_netdev(sdata);
+
+ for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
+ __skb_queue_purge(&sdata->fragments[i].skb_list);
+ sdata->fragment_next = 0;
+
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ ieee80211_mesh_teardown_sdata(sdata);
+}
+
+static void ieee80211_uninit(struct net_device *dev)
+{
+ ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
+}
+
+#if LINUX_VERSION_IS_GEQ(5,2,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_dev)
+#elif LINUX_VERSION_IS_GEQ(4,19,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_dev,
+ select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
+ (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv,
+ select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,13,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv)
+#else
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb)
+#endif
+{
+ return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
+}
+
+static void
+ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+ int i;
+
+ for_each_possible_cpu(i) {
+ const struct pcpu_sw_netstats *tstats;
+ u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
+ unsigned int start;
+
+ tstats = per_cpu_ptr(netdev_tstats(dev), i);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&tstats->syncp);
+ rx_packets = tstats->rx_packets;
+ tx_packets = tstats->tx_packets;
+ rx_bytes = tstats->rx_bytes;
+ tx_bytes = tstats->tx_bytes;
+ } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
+
+ stats->rx_packets += rx_packets;
+ stats->tx_packets += tx_packets;
+ stats->rx_bytes += rx_bytes;
+ stats->tx_bytes += tx_bytes;
+ }
+}
+#if LINUX_VERSION_IS_LESS(4,11,0)
+/* Just declare it here to keep sparse happy */
+struct rtnl_link_stats64 *bp_ieee80211_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats);
+struct rtnl_link_stats64 *
+bp_ieee80211_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats){
+ ieee80211_get_stats64(dev, stats);
+ return stats;
+}
+#endif
+
+static const struct net_device_ops ieee80211_dataif_ops = {
+ .ndo_open = ieee80211_open,
+ .ndo_stop = ieee80211_stop,
+ .ndo_uninit = ieee80211_uninit,
+ .ndo_start_xmit = ieee80211_subif_start_xmit,
+ .ndo_set_rx_mode = ieee80211_set_multicast_list,
+ .ndo_set_mac_address = ieee80211_change_mac,
+ .ndo_select_queue = ieee80211_netdev_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+ .ndo_get_stats64 = ieee80211_get_stats64,
+#else
+ .ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
+#if LINUX_VERSION_IS_GEQ(5,2,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_dev)
+#elif LINUX_VERSION_IS_GEQ(4,19,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_dev,
+ select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
+ (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv,
+ select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,13,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv)
+#else
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb)
+#endif
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_radiotap_header *rtap = (void *)skb->data;
+
+ if (local->hw.queues < IEEE80211_NUM_ACS)
+ return 0;
+
+ if (skb->len < 4 ||
+ skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
+ return 0; /* doesn't matter, frame will be dropped */
+
+ hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
+
+ return ieee80211_select_queue_80211(sdata, skb, hdr);
+}
+
+static const struct net_device_ops ieee80211_monitorif_ops = {
+ .ndo_open = ieee80211_open,
+ .ndo_stop = ieee80211_stop,
+ .ndo_uninit = ieee80211_uninit,
+ .ndo_start_xmit = ieee80211_monitor_start_xmit,
+ .ndo_set_rx_mode = ieee80211_set_multicast_list,
+ .ndo_set_mac_address = ieee80211_change_mac,
+ .ndo_select_queue = ieee80211_monitor_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+ .ndo_get_stats64 = ieee80211_get_stats64,
+#else
+ .ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
+static const struct net_device_ops ieee80211_dataif_8023_ops = {
+ .ndo_open = ieee80211_open,
+ .ndo_stop = ieee80211_stop,
+ .ndo_uninit = ieee80211_uninit,
+ .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
+ .ndo_set_rx_mode = ieee80211_set_multicast_list,
+ .ndo_set_mac_address = ieee80211_change_mac,
+ .ndo_select_queue = ieee80211_netdev_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+ .ndo_get_stats64 = ieee80211_get_stats64,
+#else
+ .ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
{
switch (iftype) {
@@ -389,6 +893,31 @@ static bool ieee80211_set_sdata_offload_
return true;
}
+static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_sub_if_data *bss = sdata;
+ bool enabled;
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ if (!sdata->bss)
+ return;
+
+ bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
+ }
+
+ if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
+ !ieee80211_iftype_supports_encap_offload(bss->vif.type))
+ return;
+
+ enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ if (sdata->wdev.use_4addr &&
+ !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
+ enabled = false;
+
+ sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
+ &ieee80211_dataif_ops;
+}
static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
{
@@ -866,511 +1395,6 @@ int ieee80211_do_open(struct wireless_de
return res;
}
-static int ieee80211_open(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- int err;
-
- /* fail early if user set an invalid address */
- if (!is_valid_ether_addr(dev->dev_addr))
- return -EADDRNOTAVAIL;
-
- err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
- if (err)
- return err;
-
- return ieee80211_do_open(&sdata->wdev, true);
-}
-
-static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
- bool going_down)
-{
- struct ieee80211_local *local = sdata->local;
- unsigned long flags;
- struct sk_buff *skb, *tmp;
- u32 hw_reconf_flags = 0;
- int i, flushed;
- struct ps_data *ps;
- struct cfg80211_chan_def chandef;
- bool cancel_scan;
- struct cfg80211_nan_func *func;
-
- clear_bit(SDATA_STATE_RUNNING, &sdata->state);
-
- cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
- if (cancel_scan)
- ieee80211_scan_cancel(local);
-
- /*
- * Stop TX on this interface first.
- */
- if (sdata->dev)
- netif_tx_stop_all_queues(sdata->dev);
-
- ieee80211_roc_purge(local, sdata);
-
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_STATION:
- ieee80211_mgd_stop(sdata);
- break;
- case NL80211_IFTYPE_ADHOC:
- ieee80211_ibss_stop(sdata);
- break;
- case NL80211_IFTYPE_MONITOR:
- if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
- break;
- list_del_rcu(&sdata->u.mntr.list);
- break;
- default:
- break;
- }
-
- /*
- * Remove all stations associated with this interface.
- *
- * This must be done before calling ops->remove_interface()
- * because otherwise we can later invoke ops->sta_notify()
- * whenever the STAs are removed, and that invalidates driver
- * assumptions about always getting a vif pointer that is valid
- * (because if we remove a STA after ops->remove_interface()
- * the driver will have removed the vif info already!)
- *
- * In WDS mode a station must exist here and be flushed, for
- * AP_VLANs stations may exist since there's nothing else that
- * would have removed them, but in other modes there shouldn't
- * be any stations.
- */
- flushed = sta_info_flush(sdata);
- WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
- ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
- (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
-
- /* don't count this interface for allmulti while it is down */
- if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
- atomic_dec(&local->iff_allmultis);
-
- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- local->fif_pspoll--;
- local->fif_probe_req--;
- } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
- local->fif_probe_req--;
- }
-
- if (sdata->dev) {
- netif_addr_lock_bh(sdata->dev);
- spin_lock_bh(&local->filter_lock);
- __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
- sdata->dev->addr_len);
- spin_unlock_bh(&local->filter_lock);
- netif_addr_unlock_bh(sdata->dev);
- }
-
- del_timer_sync(&local->dynamic_ps_timer);
- cancel_work_sync(&local->dynamic_ps_enable_work);
-
- cancel_work_sync(&sdata->recalc_smps);
- sdata_lock(sdata);
- mutex_lock(&local->mtx);
- sdata->vif.csa_active = false;
- if (sdata->vif.type == NL80211_IFTYPE_STATION)
- sdata->u.mgd.csa_waiting_bcn = false;
- if (sdata->csa_block_tx) {
- ieee80211_wake_vif_queues(local, sdata,
- IEEE80211_QUEUE_STOP_REASON_CSA);
- sdata->csa_block_tx = false;
- }
- mutex_unlock(&local->mtx);
- sdata_unlock(sdata);
-
- cancel_work_sync(&sdata->csa_finalize_work);
-
- cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
-
- if (sdata->wdev.cac_started) {
- chandef = sdata->vif.bss_conf.chandef;
- WARN_ON(local->suspended);
- mutex_lock(&local->mtx);
- ieee80211_vif_release_channel(sdata);
- mutex_unlock(&local->mtx);
- cfg80211_cac_event(sdata->dev, &chandef,
- NL80211_RADAR_CAC_ABORTED,
- GFP_KERNEL);
- }
-
- /* APs need special treatment */
- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- struct ieee80211_sub_if_data *vlan, *tmpsdata;
-
- /* down all dependent devices, that is VLANs */
- list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
- u.vlan.list)
- dev_close(vlan->dev);
- WARN_ON(!list_empty(&sdata->u.ap.vlans));
- } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
- /* remove all packets in parent bc_buf pointing to this dev */
- ps = &sdata->bss->ps;
-
- spin_lock_irqsave(&ps->bc_buf.lock, flags);
- skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
- if (skb->dev == sdata->dev) {
- __skb_unlink(skb, &ps->bc_buf);
- local->total_ps_buffered--;
- ieee80211_free_txskb(&local->hw, skb);
- }
- }
- spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
- }
-
- if (going_down)
- local->open_count--;
-
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP_VLAN:
- mutex_lock(&local->mtx);
- list_del(&sdata->u.vlan.list);
- mutex_unlock(&local->mtx);
- RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
- /* see comment in the default case below */
- ieee80211_free_keys(sdata, true);
- /* no need to tell driver */
- break;
- case NL80211_IFTYPE_MONITOR:
- if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
- local->cooked_mntrs--;
- break;
- }
-
- local->monitors--;
- if (local->monitors == 0) {
- local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
- hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
- }
-
- ieee80211_adjust_monitor_flags(sdata, -1);
- break;
- case NL80211_IFTYPE_NAN:
- /* clean all the functions */
- spin_lock_bh(&sdata->u.nan.func_lock);
-
- idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
- idr_remove(&sdata->u.nan.function_inst_ids, i);
- cfg80211_free_nan_func(func);
- }
- idr_destroy(&sdata->u.nan.function_inst_ids);
-
- spin_unlock_bh(&sdata->u.nan.func_lock);
- break;
- case NL80211_IFTYPE_P2P_DEVICE:
- /* relies on synchronize_rcu() below */
- RCU_INIT_POINTER(local->p2p_sdata, NULL);
- /* fall through */
- default:
- cancel_work_sync(&sdata->work);
- /*
- * When we get here, the interface is marked down.
- * Free the remaining keys, if there are any
- * (which can happen in AP mode if userspace sets
- * keys before the interface is operating, and maybe
- * also in WDS mode)
- *
- * Force the key freeing to always synchronize_net()
- * to wait for the RX path in case it is using this
- * interface enqueuing frames at this very time on
- * another CPU.
- */
- ieee80211_free_keys(sdata, true);
- skb_queue_purge(&sdata->skb_queue);
- }
-
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
- skb_queue_walk_safe(&local->pending[i], skb, tmp) {
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- if (info->control.vif == &sdata->vif) {
- __skb_unlink(skb, &local->pending[i]);
- ieee80211_free_txskb(&local->hw, skb);
- }
- }
- }
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
-
- if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
- ieee80211_txq_remove_vlan(local, sdata);
-
- sdata->bss = NULL;
-
- if (local->open_count == 0)
- ieee80211_clear_tx_pending(local);
-
- sdata->vif.bss_conf.beacon_int = 0;
-
- /*
- * If the interface goes down while suspended, presumably because
- * the device was unplugged and that happens before our resume,
- * then the driver is already unconfigured and the remainder of
- * this function isn't needed.
- * XXX: what about WoWLAN? If the device has software state, e.g.
- * memory allocated, it might expect teardown commands from
- * mac80211 here?
- */
- if (local->suspended) {
- WARN_ON(local->wowlan);
- WARN_ON(rtnl_dereference(local->monitor_sdata));
- return;
- }
-
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP_VLAN:
- break;
- case NL80211_IFTYPE_MONITOR:
- if (local->monitors == 0)
- ieee80211_del_virtual_monitor(local);
-
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
- mutex_unlock(&local->mtx);
-
- if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
- break;
-
- /* fall through */
- default:
- if (going_down)
- drv_remove_interface(local, sdata);
- }
-
- ieee80211_recalc_ps(local);
-
- if (cancel_scan)
- flush_delayed_work(&local->scan_work);
-
- if (local->open_count == 0) {
- ieee80211_stop_device(local);
-
- /* no reconfiguring after stop! */
- return;
- }
-
- /* do after stop to avoid reconfiguring when we stop anyway */
- ieee80211_configure_filter(local);
- ieee80211_hw_config(local, hw_reconf_flags);
-
- if (local->monitors == local->open_count)
- ieee80211_add_virtual_monitor(local);
-}
-
-static int ieee80211_stop(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- ieee80211_do_stop(sdata, true);
-
- return 0;
-}
-
-static void ieee80211_set_multicast_list(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct ieee80211_local *local = sdata->local;
- int allmulti, sdata_allmulti;
-
- allmulti = !!(dev->flags & IFF_ALLMULTI);
- sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
-
- if (allmulti != sdata_allmulti) {
- if (dev->flags & IFF_ALLMULTI)
- atomic_inc(&local->iff_allmultis);
- else
- atomic_dec(&local->iff_allmultis);
- sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
- }
-
- spin_lock_bh(&local->filter_lock);
- __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
- spin_unlock_bh(&local->filter_lock);
- ieee80211_queue_work(&local->hw, &local->reconfig_filter);
-}
-
-/*
- * Called when the netdev is removed or, by the code below, before
- * the interface type changes.
- */
-static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
-{
- int i;
-
- /* free extra data */
- ieee80211_free_keys(sdata, false);
-
- ieee80211_debugfs_remove_netdev(sdata);
-
- for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
- __skb_queue_purge(&sdata->fragments[i].skb_list);
- sdata->fragment_next = 0;
-
- if (ieee80211_vif_is_mesh(&sdata->vif))
- ieee80211_mesh_teardown_sdata(sdata);
-}
-
-static void ieee80211_uninit(struct net_device *dev)
-{
- ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
-}
-
-#if LINUX_VERSION_IS_GEQ(5,2,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_dev)
-#elif LINUX_VERSION_IS_GEQ(4,19,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_dev,
- select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
- (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- void *accel_priv,
- select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,13,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- void *accel_priv)
-#else
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb)
-#endif
-{
- return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
-}
-
-static void
-ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
-{
- int i;
-
- for_each_possible_cpu(i) {
- const struct pcpu_sw_netstats *tstats;
- u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
- unsigned int start;
-
- tstats = per_cpu_ptr(netdev_tstats(dev), i);
-
- do {
- start = u64_stats_fetch_begin_irq(&tstats->syncp);
- rx_packets = tstats->rx_packets;
- tx_packets = tstats->tx_packets;
- rx_bytes = tstats->rx_bytes;
- tx_bytes = tstats->tx_bytes;
- } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
-
- stats->rx_packets += rx_packets;
- stats->tx_packets += tx_packets;
- stats->rx_bytes += rx_bytes;
- stats->tx_bytes += tx_bytes;
- }
-}
-#if LINUX_VERSION_IS_LESS(4,11,0)
-/* Just declare it here to keep sparse happy */
-struct rtnl_link_stats64 *bp_ieee80211_get_stats64(struct net_device *dev,
- struct rtnl_link_stats64 *stats);
-struct rtnl_link_stats64 *
-bp_ieee80211_get_stats64(struct net_device *dev,
- struct rtnl_link_stats64 *stats){
- ieee80211_get_stats64(dev, stats);
- return stats;
-}
-#endif
-
-static const struct net_device_ops ieee80211_dataif_ops = {
- .ndo_open = ieee80211_open,
- .ndo_stop = ieee80211_stop,
- .ndo_uninit = ieee80211_uninit,
- .ndo_start_xmit = ieee80211_subif_start_xmit,
- .ndo_set_rx_mode = ieee80211_set_multicast_list,
- .ndo_set_mac_address = ieee80211_change_mac,
- .ndo_select_queue = ieee80211_netdev_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
- .ndo_get_stats64 = ieee80211_get_stats64,
-#else
- .ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
-#if LINUX_VERSION_IS_GEQ(5,2,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_dev)
-#elif LINUX_VERSION_IS_GEQ(4,19,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_dev,
- select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
- (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- void *accel_priv,
- select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,13,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- void *accel_priv)
-#else
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb)
-#endif
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_hdr *hdr;
- struct ieee80211_radiotap_header *rtap = (void *)skb->data;
-
- if (local->hw.queues < IEEE80211_NUM_ACS)
- return 0;
-
- if (skb->len < 4 ||
- skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
- return 0; /* doesn't matter, frame will be dropped */
-
- hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
-
- return ieee80211_select_queue_80211(sdata, skb, hdr);
-}
-
-static const struct net_device_ops ieee80211_monitorif_ops = {
- .ndo_open = ieee80211_open,
- .ndo_stop = ieee80211_stop,
- .ndo_uninit = ieee80211_uninit,
- .ndo_start_xmit = ieee80211_monitor_start_xmit,
- .ndo_set_rx_mode = ieee80211_set_multicast_list,
- .ndo_set_mac_address = ieee80211_change_mac,
- .ndo_select_queue = ieee80211_monitor_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
- .ndo_get_stats64 = ieee80211_get_stats64,
-#else
- .ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
-static const struct net_device_ops ieee80211_dataif_8023_ops = {
- .ndo_open = ieee80211_open,
- .ndo_stop = ieee80211_stop,
- .ndo_uninit = ieee80211_uninit,
- .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
- .ndo_set_rx_mode = ieee80211_set_multicast_list,
- .ndo_set_mac_address = ieee80211_change_mac,
- .ndo_select_queue = ieee80211_netdev_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
- .ndo_get_stats64 = ieee80211_get_stats64,
-#else
- .ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
static void ieee80211_if_free(struct net_device *dev)
{
free_percpu(netdev_tstats(dev));
@@ -1401,32 +1425,6 @@ static void ieee80211_if_setup_no_queue(
#endif
}
-static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
-{
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_sub_if_data *bss = sdata;
- bool enabled;
-
- if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
- if (!sdata->bss)
- return;
-
- bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
- }
-
- if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
- !ieee80211_iftype_supports_encap_offload(bss->vif.type))
- return;
-
- enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
- if (sdata->wdev.use_4addr &&
- !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
- enabled = false;
-
- sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
- &ieee80211_dataif_ops;
-}
-
static void ieee80211_iface_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
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