[PATCH v4 14/14] mac80211: reorganize code to remove a forward declaration

Felix Fietkau
2020-09-08T16:37:31Z

Remove the newly added ieee80211_set_vif_encap_ops declaration.
No further code changes

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
net/mac80211/iface.c | 1626 +++++++++++++++++++++---------------------
1 file changed, 812 insertions(+), 814 deletions(-)

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 02bb94de7bde..7ac9af66f545 100644
--- 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)
{
@@ -349,968 +348,993 @@ static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
return 0;
}

-static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
+static int ieee80211_open(struct net_device *dev)
{
- switch (iftype) {
- /* P2P GO and client are mapped to AP/STATION types */
- case NL80211_IFTYPE_AP:
- case NL80211_IFTYPE_STATION:
- return true;
- default:
- return false;
- }
+ 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 bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
+static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
+ bool going_down)
{
struct ieee80211_local *local = sdata->local;
- u32 flags;
-
- flags = sdata->vif.offload_flags;
+ 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;

- if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
- ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
- flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ clear_bit(SDATA_STATE_RUNNING, &sdata->state);

- if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
- local->hw.wiphy->frag_threshold != (u32)-1)
- flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
+ if (cancel_scan)
+ ieee80211_scan_cancel(local);

- if (local->monitors)
- flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
- } else {
- flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
- }
+ /*
+ * Stop TX on this interface first.
+ */
+ if (sdata->dev)
+ netif_tx_stop_all_queues(sdata->dev);

- if (sdata->vif.offload_flags == flags)
- return false;
+ ieee80211_roc_purge(local, sdata);

- sdata->vif.offload_flags = flags;
- return true;
-}
+ 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)));

-static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
-{
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_sub_if_data *vsdata;
+ /* don't count this interface for allmulti while it is down */
+ if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+ atomic_dec(&local->iff_allmultis);

- if (ieee80211_set_sdata_offload_flags(sdata)) {
- drv_update_vif_offload(local, sdata);
- ieee80211_set_vif_encap_ops(sdata);
+ 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--;
}

- list_for_each_entry(vsdata, &local->interfaces, list) {
- if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
- vsdata->bss != &sdata->u.ap)
- continue;
-
- ieee80211_set_vif_encap_ops(vsdata);
+ 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);
}
-}
-
-void ieee80211_recalc_offload(struct ieee80211_local *local)
-{
- struct ieee80211_sub_if_data *sdata;
-
- if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
- return;

- mutex_lock(&local->iflist_mtx);
-
- list_for_each_entry(sdata, &local->interfaces, list) {
- if (!ieee80211_sdata_running(sdata))
- continue;
+ del_timer_sync(&local->dynamic_ps_timer);
+ cancel_work_sync(&local->dynamic_ps_enable_work);

- ieee80211_recalc_sdata_offload(sdata);
+ 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);

- mutex_unlock(&local->iflist_mtx);
-}
-
-void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
- const int offset)
-{
- struct ieee80211_local *local = sdata->local;
- u32 flags = sdata->u.mntr.flags;
+ cancel_work_sync(&sdata->csa_finalize_work);

-#define ADJUST(_f, _s) do { \
- if (flags & MONITOR_FLAG_##_f) \
- local->fif_##_s += offset; \
- } while (0)
+ cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);

- ADJUST(FCSFAIL, fcsfail);
- ADJUST(PLCPFAIL, plcpfail);
- ADJUST(CONTROL, control);
- ADJUST(CONTROL, pspoll);
- ADJUST(OTHER_BSS, other_bss);
+ 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);
+ }

-#undef ADJUST
-}
+ /* APs need special treatment */
+ if (sdata->vif.type == NL80211_IFTYPE_AP) {
+ struct ieee80211_sub_if_data *vlan, *tmpsdata;

-static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
-{
- struct ieee80211_local *local = sdata->local;
- int i;
+ /* 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;

- for (i = 0; i < IEEE80211_NUM_ACS; i++) {
- if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
- sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
- else if (local->hw.queues >= IEEE80211_NUM_ACS)
- sdata->vif.hw_queue[i] = i;
- else
- sdata->vif.hw_queue[i] = 0;
+ 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);
}
- sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
-}

-int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
-{
- struct ieee80211_sub_if_data *sdata;
- int ret;
-
- if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
- return 0;
+ if (going_down)
+ local->open_count--;

- ASSERT_RTNL();
+ 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;
+ }

- if (local->monitor_sdata)
- return 0;
+ local->monitors--;
+ if (local->monitors == 0) {
+ local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
+ hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+ }

- sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
- if (!sdata)
- return -ENOMEM;
+ ieee80211_adjust_monitor_flags(sdata, -1);
+ break;
+ case NL80211_IFTYPE_NAN:
+ /* clean all the functions */
+ spin_lock_bh(&sdata->u.nan.func_lock);

- /* set up data */
- sdata->local = local;
- sdata->vif.type = NL80211_IFTYPE_MONITOR;
- snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
- wiphy_name(local->hw.wiphy));
- sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
-
- sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
-
- ieee80211_set_default_queues(sdata);
+ 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);

- ret = drv_add_interface(local, sdata);
- if (WARN_ON(ret)) {
- /* ok .. stupid driver, it asked for this! */
- kfree(sdata);
- return ret;
+ 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);
+ fallthrough;
+ 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);
}

- ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
- if (ret) {
- kfree(sdata);
- return ret;
+ 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);

- mutex_lock(&local->iflist_mtx);
- rcu_assign_pointer(local->monitor_sdata, sdata);
- mutex_unlock(&local->iflist_mtx);
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ ieee80211_txq_remove_vlan(local, sdata);

- mutex_lock(&local->mtx);
- ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
- IEEE80211_CHANCTX_EXCLUSIVE);
- mutex_unlock(&local->mtx);
- if (ret) {
- mutex_lock(&local->iflist_mtx);
- RCU_INIT_POINTER(local->monitor_sdata, NULL);
- mutex_unlock(&local->iflist_mtx);
- synchronize_net();
- drv_remove_interface(local, sdata);
- kfree(sdata);
- return ret;
+ 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;
}

- skb_queue_head_init(&sdata->skb_queue);
- INIT_WORK(&sdata->work, ieee80211_iface_work);
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP_VLAN:
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (local->monitors == 0)
+ ieee80211_del_virtual_monitor(local);

- return 0;
-}
+ mutex_lock(&local->mtx);
+ ieee80211_recalc_idle(local);
+ mutex_unlock(&local->mtx);

-void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
-{
- struct ieee80211_sub_if_data *sdata;
+ if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ break;

- if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
- return;
+ fallthrough;
+ default:
+ if (going_down)
+ drv_remove_interface(local, sdata);
+ }

- ASSERT_RTNL();
+ ieee80211_recalc_ps(local);

- mutex_lock(&local->iflist_mtx);
+ if (cancel_scan)
+ flush_delayed_work(&local->scan_work);

- sdata = rcu_dereference_protected(local->monitor_sdata,
- lockdep_is_held(&local->iflist_mtx));
- if (!sdata) {
- mutex_unlock(&local->iflist_mtx);
+ if (local->open_count == 0) {
+ ieee80211_stop_device(local);
+
+ /* no reconfiguring after stop! */
return;
}

- RCU_INIT_POINTER(local->monitor_sdata, NULL);
- mutex_unlock(&local->iflist_mtx);
+ /* do after stop to avoid reconfiguring when we stop anyway */
+ ieee80211_configure_filter(local);
+ ieee80211_hw_config(local, hw_reconf_flags);

- synchronize_net();
+ if (local->monitors == local->open_count)
+ ieee80211_add_virtual_monitor(local);
+}

- mutex_lock(&local->mtx);
- ieee80211_vif_release_channel(sdata);
- mutex_unlock(&local->mtx);
+static int ieee80211_stop(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

- drv_remove_interface(local, sdata);
+ ieee80211_do_stop(sdata, true);

- kfree(sdata);
+ return 0;
}

-/*
- * NOTE: Be very careful when changing this function, it must NOT return
- * an error on interface type changes that have been pre-checked, so most
- * checks should be in ieee80211_check_concurrent_iface.
- */
-int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
+static void ieee80211_set_multicast_list(struct net_device *dev)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
- struct net_device *dev = wdev->netdev;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
- struct sta_info *sta;
- u32 changed = 0;
- int res;
- u32 hw_reconf_flags = 0;
+ int allmulti, sdata_allmulti;

- switch (sdata->vif.type) {
- case NL80211_IFTYPE_WDS:
- if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
- return -ENOLINK;
- break;
- case NL80211_IFTYPE_AP_VLAN: {
- struct ieee80211_sub_if_data *master;
+ allmulti = !!(dev->flags & IFF_ALLMULTI);
+ sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);

- if (!sdata->bss)
- return -ENOLINK;
+ 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;
+ }

- mutex_lock(&local->mtx);
- list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
- mutex_unlock(&local->mtx);
+ 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);
+}

- master = container_of(sdata->bss,
- struct ieee80211_sub_if_data, u.ap);
- sdata->control_port_protocol =
- master->control_port_protocol;
- sdata->control_port_no_encrypt =
- master->control_port_no_encrypt;
- sdata->control_port_over_nl80211 =
- master->control_port_over_nl80211;
- sdata->control_port_no_preauth =
- master->control_port_no_preauth;
- sdata->vif.cab_queue = master->vif.cab_queue;
- memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
- sizeof(sdata->vif.hw_queue));
- sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
+/*
+ * 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;

- mutex_lock(&local->key_mtx);
- sdata->crypto_tx_tailroom_needed_cnt +=
- master->crypto_tx_tailroom_needed_cnt;
- mutex_unlock(&local->key_mtx);
+ /* free extra data */
+ ieee80211_free_keys(sdata, false);

- break;
- }
- case NL80211_IFTYPE_AP:
- sdata->bss = &sdata->u.ap;
- break;
- case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_STATION:
- case NL80211_IFTYPE_MONITOR:
- case NL80211_IFTYPE_ADHOC:
- case NL80211_IFTYPE_P2P_DEVICE:
- case NL80211_IFTYPE_OCB:
- case NL80211_IFTYPE_NAN:
- /* no special treatment */
- break;
- case NL80211_IFTYPE_UNSPECIFIED:
- case NUM_NL80211_IFTYPES:
- case NL80211_IFTYPE_P2P_CLIENT:
- case NL80211_IFTYPE_P2P_GO:
- /* cannot happen */
- WARN_ON(1);
- break;
- }
+ ieee80211_debugfs_remove_netdev(sdata);

- if (local->open_count == 0) {
- res = drv_start(local);
- if (res)
- goto err_del_bss;
- /* we're brought up, everything changes */
- hw_reconf_flags = ~0;
- ieee80211_led_radio(local, true);
- ieee80211_mod_tpt_led_trig(local,
- IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
- }
+ for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
+ __skb_queue_purge(&sdata->fragments[i].skb_list);
+ sdata->fragment_next = 0;

- /*
- * Copy the hopefully now-present MAC address to
- * this interface, if it has the special null one.
- */
- if (dev && is_zero_ether_addr(dev->dev_addr)) {
- memcpy(dev->dev_addr,
- local->hw.wiphy->perm_addr,
- ETH_ALEN);
- memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
-
- if (!is_valid_ether_addr(dev->dev_addr)) {
- res = -EADDRNOTAVAIL;
- goto err_stop;
- }
- }
-
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP_VLAN:
- /* no need to tell driver, but set carrier and chanctx */
- if (rtnl_dereference(sdata->bss->beacon)) {
- ieee80211_vif_vlan_copy_chanctx(sdata);
- netif_carrier_on(dev);
- ieee80211_set_vif_encap_ops(sdata);
- } else {
- netif_carrier_off(dev);
- }
- break;
- case NL80211_IFTYPE_MONITOR:
- if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
- local->cooked_mntrs++;
- break;
- }
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ ieee80211_mesh_teardown_sdata(sdata);
+}

- if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
- res = drv_add_interface(local, sdata);
- if (res)
- goto err_stop;
- } else if (local->monitors == 0 && local->open_count == 0) {
- res = ieee80211_add_virtual_monitor(local);
- if (res)
- goto err_stop;
- }
+static void ieee80211_uninit(struct net_device *dev)
+{
+ ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
+}

- /* must be before the call to ieee80211_configure_filter */
- local->monitors++;
- if (local->monitors == 1) {
- local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
- hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
- }
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_dev)
+{
+ return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
+}

- ieee80211_adjust_monitor_flags(sdata, 1);
- ieee80211_configure_filter(local);
- ieee80211_recalc_offload(local);
- mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
- mutex_unlock(&local->mtx);
+static void
+ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+ int i;

- netif_carrier_on(dev);
- break;
- default:
- if (coming_up) {
- ieee80211_del_virtual_monitor(local);
- ieee80211_set_sdata_offload_flags(sdata);
+ for_each_possible_cpu(i) {
+ const struct pcpu_sw_netstats *tstats;
+ u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
+ unsigned int start;

- res = drv_add_interface(local, sdata);
- if (res)
- goto err_stop;
+ tstats = per_cpu_ptr(dev->tstats, i);

- ieee80211_set_vif_encap_ops(sdata);
- res = ieee80211_check_queues(sdata,
- ieee80211_vif_type_p2p(&sdata->vif));
- if (res)
- goto err_del_interface;
- }
+ 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));

- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- local->fif_pspoll++;
- local->fif_probe_req++;
+ stats->rx_packets += rx_packets;
+ stats->tx_packets += tx_packets;
+ stats->rx_bytes += rx_bytes;
+ stats->tx_bytes += tx_bytes;
+ }
+}

- ieee80211_configure_filter(local);
- } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
- local->fif_probe_req++;
- }
+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,
+ .ndo_get_stats64 = ieee80211_get_stats64,
+};

- if (sdata->vif.probe_req_reg)
- drv_config_iface_filter(local, sdata,
- FIF_PROBE_REQ,
- FIF_PROBE_REQ);
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+ struct sk_buff *skb,
+ struct net_device *sb_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);
+ struct ieee80211_hdr *hdr;
+ int len_rthdr;

- if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
- sdata->vif.type != NL80211_IFTYPE_NAN)
- changed |= ieee80211_reset_erp_info(sdata);
- ieee80211_bss_info_change_notify(sdata, changed);
+ if (local->hw.queues < IEEE80211_NUM_ACS)
+ return 0;

- switch (sdata->vif.type) {
- case NL80211_IFTYPE_STATION:
- case NL80211_IFTYPE_ADHOC:
- case NL80211_IFTYPE_AP:
- case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_OCB:
- netif_carrier_off(dev);
- break;
- case NL80211_IFTYPE_WDS:
- case NL80211_IFTYPE_P2P_DEVICE:
- case NL80211_IFTYPE_NAN:
- break;
- default:
- /* not reached */
- WARN_ON(1);
- }
+ /* reset flags and info before parsing radiotap header */
+ memset(info, 0, sizeof(*info));

- /*
- * Set default queue parameters so drivers don't
- * need to initialise the hardware if the hardware
- * doesn't start up with sane defaults.
- * Enable QoS for anything but station interfaces.
- */
- ieee80211_set_wmm_default(sdata, true,
- sdata->vif.type != NL80211_IFTYPE_STATION);
- }
+ if (!ieee80211_parse_tx_radiotap(skb, dev))
+ return 0; /* doesn't matter, frame will be dropped */

- set_bit(SDATA_STATE_RUNNING, &sdata->state);
+ len_rthdr = ieee80211_get_radiotap_len(skb->data);
+ hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
+ if (skb->len < len_rthdr + 2 ||
+ skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
+ return 0; /* doesn't matter, frame will be dropped */

- switch (sdata->vif.type) {
- case NL80211_IFTYPE_WDS:
- /* Create STA entry for the WDS peer */
- sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
- GFP_KERNEL);
- if (!sta) {
- res = -ENOMEM;
- goto err_del_interface;
- }
+ return ieee80211_select_queue_80211(sdata, skb, hdr);
+}

- sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
- sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
- sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+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,
+ .ndo_get_stats64 = ieee80211_get_stats64,
+};

- res = sta_info_insert(sta);
- if (res) {
- /* STA has been freed */
- goto err_del_interface;
- }
+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,
+ .ndo_get_stats64 = ieee80211_get_stats64,
+};

- rate_control_rate_init(sta);
- netif_carrier_on(dev);
- break;
- case NL80211_IFTYPE_P2P_DEVICE:
- rcu_assign_pointer(local->p2p_sdata, sdata);
- break;
- case NL80211_IFTYPE_MONITOR:
- if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
- break;
- list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
- break;
+static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
+{
+ switch (iftype) {
+ /* P2P GO and client are mapped to AP/STATION types */
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_STATION:
+ return true;
default:
- break;
+ return false;
}
+}

- /*
- * set_multicast_list will be invoked by the networking core
- * which will check whether any increments here were done in
- * error and sync them down to the hardware as filter flags.
- */
- if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
- atomic_inc(&local->iff_allmultis);
-
- if (coming_up)
- local->open_count++;
-
- if (hw_reconf_flags)
- ieee80211_hw_config(local, hw_reconf_flags);
-
- ieee80211_recalc_ps(local);
+static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ u32 flags;

- if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
- sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
- local->ops->wake_tx_queue) {
- /* XXX: for AP_VLAN, actually track AP queues */
- if (dev)
- netif_tx_start_all_queues(dev);
- } else if (dev) {
- unsigned long flags;
- int n_acs = IEEE80211_NUM_ACS;
- int ac;
+ flags = sdata->vif.offload_flags;

- if (local->hw.queues < IEEE80211_NUM_ACS)
- n_acs = 1;
+ if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
+ ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
+ flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;

- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
- (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
- skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
- for (ac = 0; ac < n_acs; ac++) {
- int ac_queue = sdata->vif.hw_queue[ac];
+ if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
+ local->hw.wiphy->frag_threshold != (u32)-1)
+ flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;

- if (local->queue_stop_reasons[ac_queue] == 0 &&
- skb_queue_empty(&local->pending[ac_queue]))
- netif_start_subqueue(dev, ac);
- }
- }
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+ if (local->monitors)
+ flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ } else {
+ flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
}

- return 0;
- err_del_interface:
- drv_remove_interface(local, sdata);
- err_stop:
- if (!local->open_count)
- drv_stop(local);
- err_del_bss:
- sdata->bss = NULL;
- if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
- mutex_lock(&local->mtx);
- list_del(&sdata->u.vlan.list);
- mutex_unlock(&local->mtx);
- }
- /* might already be clear but that doesn't matter */
- clear_bit(SDATA_STATE_RUNNING, &sdata->state);
- return res;
+ if (sdata->vif.offload_flags == flags)
+ return false;
+
+ sdata->vif.offload_flags = flags;
+ return true;
}

-static int ieee80211_open(struct net_device *dev)
+static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- int err;
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_sub_if_data *bss = sdata;
+ bool enabled;

- /* fail early if user set an invalid address */
- if (!is_valid_ether_addr(dev->dev_addr))
- return -EADDRNOTAVAIL;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ if (!sdata->bss)
+ return;

- err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
- if (err)
- return err;
+ bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
+ }

- return ieee80211_do_open(&sdata->wdev, true);
-}
+ if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
+ !ieee80211_iftype_supports_encap_offload(bss->vif.type))
+ return;

-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;
+ enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ if (sdata->wdev.use_4addr &&
+ !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
+ enabled = false;

- clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+ sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
+ &ieee80211_dataif_ops;
+}

- cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
- if (cancel_scan)
- ieee80211_scan_cancel(local);
+static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_sub_if_data *vsdata;

- /*
- * Stop TX on this interface first.
- */
- if (sdata->dev)
- netif_tx_stop_all_queues(sdata->dev);
+ if (ieee80211_set_sdata_offload_flags(sdata)) {
+ drv_update_vif_offload(local, sdata);
+ ieee80211_set_vif_encap_ops(sdata);
+ }

- ieee80211_roc_purge(local, sdata);
+ list_for_each_entry(vsdata, &local->interfaces, list) {
+ if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
+ vsdata->bss != &sdata->u.ap)
+ continue;

- 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;
+ ieee80211_set_vif_encap_ops(vsdata);
}
+}

- /*
- * 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)));
+void ieee80211_recalc_offload(struct ieee80211_local *local)
+{
+ struct ieee80211_sub_if_data *sdata;

- /* don't count this interface for allmulti while it is down */
- if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
- atomic_dec(&local->iff_allmultis);
+ if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
+ return;

- 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--;
- }
+ mutex_lock(&local->iflist_mtx);

- 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);
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ if (!ieee80211_sdata_running(sdata))
+ continue;
+
+ ieee80211_recalc_sdata_offload(sdata);
}

- del_timer_sync(&local->dynamic_ps_timer);
- cancel_work_sync(&local->dynamic_ps_enable_work);
+ mutex_unlock(&local->iflist_mtx);
+}

- 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);
+void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
+ const int offset)
+{
+ struct ieee80211_local *local = sdata->local;
+ u32 flags = sdata->u.mntr.flags;

- cancel_work_sync(&sdata->csa_finalize_work);
+#define ADJUST(_f, _s) do { \
+ if (flags & MONITOR_FLAG_##_f) \
+ local->fif_##_s += offset; \
+ } while (0)

- cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+ ADJUST(FCSFAIL, fcsfail);
+ ADJUST(PLCPFAIL, plcpfail);
+ ADJUST(CONTROL, control);
+ ADJUST(CONTROL, pspoll);
+ ADJUST(OTHER_BSS, other_bss);

- 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);
+#undef ADJUST
+}
+
+static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ int i;
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
+ sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
+ else if (local->hw.queues >= IEEE80211_NUM_ACS)
+ sdata->vif.hw_queue[i] = i;
+ else
+ sdata->vif.hw_queue[i] = 0;
}
+ sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+}

- /* APs need special treatment */
- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- struct ieee80211_sub_if_data *vlan, *tmpsdata;
+int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
+{
+ struct ieee80211_sub_if_data *sdata;
+ int ret;

- /* 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;
+ if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
+ return 0;

- 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);
- }
+ ASSERT_RTNL();

- if (going_down)
- local->open_count--;
+ if (local->monitor_sdata)
+ return 0;

- 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;
- }
+ sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
+ if (!sdata)
+ return -ENOMEM;

- local->monitors--;
- if (local->monitors == 0) {
- local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
- hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
- }
+ /* set up data */
+ sdata->local = local;
+ sdata->vif.type = NL80211_IFTYPE_MONITOR;
+ snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
+ wiphy_name(local->hw.wiphy));
+ sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;

- ieee80211_adjust_monitor_flags(sdata, -1);
- break;
- case NL80211_IFTYPE_NAN:
- /* clean all the functions */
- spin_lock_bh(&sdata->u.nan.func_lock);
+ sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;

- 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);
+ ieee80211_set_default_queues(sdata);

- 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);
- fallthrough;
- 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);
+ ret = drv_add_interface(local, sdata);
+ if (WARN_ON(ret)) {
+ /* ok .. stupid driver, it asked for this! */
+ kfree(sdata);
+ return ret;
+ }
+
+ ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
+ if (ret) {
+ kfree(sdata);
+ return ret;
}

- 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);
- }
- }
+ mutex_lock(&local->iflist_mtx);
+ rcu_assign_pointer(local->monitor_sdata, sdata);
+ mutex_unlock(&local->iflist_mtx);
+
+ mutex_lock(&local->mtx);
+ ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
+ IEEE80211_CHANCTX_EXCLUSIVE);
+ mutex_unlock(&local->mtx);
+ if (ret) {
+ mutex_lock(&local->iflist_mtx);
+ RCU_INIT_POINTER(local->monitor_sdata, NULL);
+ mutex_unlock(&local->iflist_mtx);
+ synchronize_net();
+ drv_remove_interface(local, sdata);
+ kfree(sdata);
+ return ret;
}
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);

- if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
- ieee80211_txq_remove_vlan(local, sdata);
+ skb_queue_head_init(&sdata->skb_queue);
+ INIT_WORK(&sdata->work, ieee80211_iface_work);

- sdata->bss = NULL;
+ return 0;
+}

- if (local->open_count == 0)
- ieee80211_clear_tx_pending(local);
+void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
+{
+ struct ieee80211_sub_if_data *sdata;

- sdata->vif.bss_conf.beacon_int = 0;
+ if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
+ return;

- /*
- * 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));
+ ASSERT_RTNL();
+
+ mutex_lock(&local->iflist_mtx);
+
+ sdata = rcu_dereference_protected(local->monitor_sdata,
+ lockdep_is_held(&local->iflist_mtx));
+ if (!sdata) {
+ mutex_unlock(&local->iflist_mtx);
return;
}

+ RCU_INIT_POINTER(local->monitor_sdata, NULL);
+ mutex_unlock(&local->iflist_mtx);
+
+ synchronize_net();
+
+ mutex_lock(&local->mtx);
+ ieee80211_vif_release_channel(sdata);
+ mutex_unlock(&local->mtx);
+
+ drv_remove_interface(local, sdata);
+
+ kfree(sdata);
+}
+
+/*
+ * NOTE: Be very careful when changing this function, it must NOT return
+ * an error on interface type changes that have been pre-checked, so most
+ * checks should be in ieee80211_check_concurrent_iface.
+ */
+int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+ struct net_device *dev = wdev->netdev;
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta;
+ u32 changed = 0;
+ int res;
+ u32 hw_reconf_flags = 0;
+
switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_WDS:
+ if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
+ return -ENOLINK;
break;
- case NL80211_IFTYPE_MONITOR:
- if (local->monitors == 0)
- ieee80211_del_virtual_monitor(local);
+ case NL80211_IFTYPE_AP_VLAN: {
+ struct ieee80211_sub_if_data *master;
+
+ if (!sdata->bss)
+ return -ENOLINK;

mutex_lock(&local->mtx);
- ieee80211_recalc_idle(local);
+ list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
mutex_unlock(&local->mtx);

- if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
- break;
-
- fallthrough;
- default:
- if (going_down)
- drv_remove_interface(local, sdata);
- }
+ master = container_of(sdata->bss,
+ struct ieee80211_sub_if_data, u.ap);
+ sdata->control_port_protocol =
+ master->control_port_protocol;
+ sdata->control_port_no_encrypt =
+ master->control_port_no_encrypt;
+ sdata->control_port_over_nl80211 =
+ master->control_port_over_nl80211;
+ sdata->control_port_no_preauth =
+ master->control_port_no_preauth;
+ sdata->vif.cab_queue = master->vif.cab_queue;
+ memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
+ sizeof(sdata->vif.hw_queue));
+ sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;

- ieee80211_recalc_ps(local);
+ mutex_lock(&local->key_mtx);
+ sdata->crypto_tx_tailroom_needed_cnt +=
+ master->crypto_tx_tailroom_needed_cnt;
+ mutex_unlock(&local->key_mtx);

- if (cancel_scan)
- flush_delayed_work(&local->scan_work);
+ break;
+ }
+ case NL80211_IFTYPE_AP:
+ sdata->bss = &sdata->u.ap;
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_P2P_DEVICE:
+ case NL80211_IFTYPE_OCB:
+ case NL80211_IFTYPE_NAN:
+ /* no special treatment */
+ break;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case NUM_NL80211_IFTYPES:
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_P2P_GO:
+ /* cannot happen */
+ WARN_ON(1);
+ break;
+ }

if (local->open_count == 0) {
- ieee80211_stop_device(local);
-
- /* no reconfiguring after stop! */
- return;
+ res = drv_start(local);
+ if (res)
+ goto err_del_bss;
+ /* we're brought up, everything changes */
+ hw_reconf_flags = ~0;
+ ieee80211_led_radio(local, true);
+ ieee80211_mod_tpt_led_trig(local,
+ IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
}

- /* 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);
-}
+ /*
+ * Copy the hopefully now-present MAC address to
+ * this interface, if it has the special null one.
+ */
+ if (dev && is_zero_ether_addr(dev->dev_addr)) {
+ memcpy(dev->dev_addr,
+ local->hw.wiphy->perm_addr,
+ ETH_ALEN);
+ memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);

-static int ieee80211_stop(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (!is_valid_ether_addr(dev->dev_addr)) {
+ res = -EADDRNOTAVAIL;
+ goto err_stop;
+ }
+ }

- ieee80211_do_stop(sdata, true);
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP_VLAN:
+ /* no need to tell driver, but set carrier and chanctx */
+ if (rtnl_dereference(sdata->bss->beacon)) {
+ ieee80211_vif_vlan_copy_chanctx(sdata);
+ netif_carrier_on(dev);
+ ieee80211_set_vif_encap_ops(sdata);
+ } else {
+ netif_carrier_off(dev);
+ }
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
+ local->cooked_mntrs++;
+ break;
+ }

- return 0;
-}
+ if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
+ res = drv_add_interface(local, sdata);
+ if (res)
+ goto err_stop;
+ } else if (local->monitors == 0 && local->open_count == 0) {
+ res = ieee80211_add_virtual_monitor(local);
+ if (res)
+ goto err_stop;
+ }

-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;
+ /* must be before the call to ieee80211_configure_filter */
+ local->monitors++;
+ if (local->monitors == 1) {
+ local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
+ hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+ }

- allmulti = !!(dev->flags & IFF_ALLMULTI);
- sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
+ ieee80211_adjust_monitor_flags(sdata, 1);
+ ieee80211_configure_filter(local);
+ ieee80211_recalc_offload(local);
+ mutex_lock(&local->mtx);
+ ieee80211_recalc_idle(local);
+ mutex_unlock(&local->mtx);

- 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;
- }
+ netif_carrier_on(dev);
+ break;
+ default:
+ if (coming_up) {
+ ieee80211_del_virtual_monitor(local);
+ ieee80211_set_sdata_offload_flags(sdata);

- 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);
-}
+ res = drv_add_interface(local, sdata);
+ if (res)
+ goto err_stop;

-/*
- * 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;
+ ieee80211_set_vif_encap_ops(sdata);
+ res = ieee80211_check_queues(sdata,
+ ieee80211_vif_type_p2p(&sdata->vif));
+ if (res)
+ goto err_del_interface;
+ }

- /* free extra data */
- ieee80211_free_keys(sdata, false);
+ if (sdata->vif.type == NL80211_IFTYPE_AP) {
+ local->fif_pspoll++;
+ local->fif_probe_req++;

- ieee80211_debugfs_remove_netdev(sdata);
+ ieee80211_configure_filter(local);
+ } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+ local->fif_probe_req++;
+ }

- for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
- __skb_queue_purge(&sdata->fragments[i].skb_list);
- sdata->fragment_next = 0;
+ if (sdata->vif.probe_req_reg)
+ drv_config_iface_filter(local, sdata,
+ FIF_PROBE_REQ,
+ FIF_PROBE_REQ);

- if (ieee80211_vif_is_mesh(&sdata->vif))
- ieee80211_mesh_teardown_sdata(sdata);
-}
+ if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
+ sdata->vif.type != NL80211_IFTYPE_NAN)
+ changed |= ieee80211_reset_erp_info(sdata);
+ ieee80211_bss_info_change_notify(sdata, changed);

-static void ieee80211_uninit(struct net_device *dev)
-{
- ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
-}
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_MESH_POINT:
+ case NL80211_IFTYPE_OCB:
+ netif_carrier_off(dev);
+ break;
+ case NL80211_IFTYPE_WDS:
+ case NL80211_IFTYPE_P2P_DEVICE:
+ case NL80211_IFTYPE_NAN:
+ break;
+ default:
+ /* not reached */
+ WARN_ON(1);
+ }

-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_dev)
-{
- return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
-}
+ /*
+ * Set default queue parameters so drivers don't
+ * need to initialise the hardware if the hardware
+ * doesn't start up with sane defaults.
+ * Enable QoS for anything but station interfaces.
+ */
+ ieee80211_set_wmm_default(sdata, true,
+ sdata->vif.type != NL80211_IFTYPE_STATION);
+ }

-static void
-ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
-{
- int i;
+ set_bit(SDATA_STATE_RUNNING, &sdata->state);

- for_each_possible_cpu(i) {
- const struct pcpu_sw_netstats *tstats;
- u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
- unsigned int start;
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_WDS:
+ /* Create STA entry for the WDS peer */
+ sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
+ GFP_KERNEL);
+ if (!sta) {
+ res = -ENOMEM;
+ goto err_del_interface;
+ }

- tstats = per_cpu_ptr(dev->tstats, i);
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+ sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);

- 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));
+ res = sta_info_insert(sta);
+ if (res) {
+ /* STA has been freed */
+ goto err_del_interface;
+ }

- stats->rx_packets += rx_packets;
- stats->tx_packets += tx_packets;
- stats->rx_bytes += rx_bytes;
- stats->tx_bytes += tx_bytes;
+ rate_control_rate_init(sta);
+ netif_carrier_on(dev);
+ break;
+ case NL80211_IFTYPE_P2P_DEVICE:
+ rcu_assign_pointer(local->p2p_sdata, sdata);
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
+ break;
+ list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
+ break;
+ default:
+ break;
}
-}

-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,
- .ndo_get_stats64 = ieee80211_get_stats64,
-};
+ /*
+ * set_multicast_list will be invoked by the networking core
+ * which will check whether any increments here were done in
+ * error and sync them down to the hardware as filter flags.
+ */
+ if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+ atomic_inc(&local->iff_allmultis);

-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
- struct sk_buff *skb,
- struct net_device *sb_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);
- struct ieee80211_hdr *hdr;
- int len_rthdr;
+ if (coming_up)
+ local->open_count++;

- if (local->hw.queues < IEEE80211_NUM_ACS)
- return 0;
+ if (hw_reconf_flags)
+ ieee80211_hw_config(local, hw_reconf_flags);

- /* reset flags and info before parsing radiotap header */
- memset(info, 0, sizeof(*info));
+ ieee80211_recalc_ps(local);

- if (!ieee80211_parse_tx_radiotap(skb, dev))
- return 0; /* doesn't matter, frame will be dropped */
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+ local->ops->wake_tx_queue) {
+ /* XXX: for AP_VLAN, actually track AP queues */
+ if (dev)
+ netif_tx_start_all_queues(dev);
+ } else if (dev) {
+ unsigned long flags;
+ int n_acs = IEEE80211_NUM_ACS;
+ int ac;

- len_rthdr = ieee80211_get_radiotap_len(skb->data);
- hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
- if (skb->len < len_rthdr + 2 ||
- skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
- return 0; /* doesn't matter, frame will be dropped */
+ if (local->hw.queues < IEEE80211_NUM_ACS)
+ n_acs = 1;

- return ieee80211_select_queue_80211(sdata, skb, hdr);
-}
+ spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+ if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
+ (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
+ skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
+ for (ac = 0; ac < n_acs; ac++) {
+ int ac_queue = sdata->vif.hw_queue[ac];

-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,
- .ndo_get_stats64 = ieee80211_get_stats64,
-};
+ if (local->queue_stop_reasons[ac_queue] == 0 &&
+ skb_queue_empty(&local->pending[ac_queue]))
+ netif_start_subqueue(dev, ac);
+ }
+ }
+ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+ }

-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,
- .ndo_get_stats64 = ieee80211_get_stats64,
-};
+ return 0;
+ err_del_interface:
+ drv_remove_interface(local, sdata);
+ err_stop:
+ if (!local->open_count)
+ drv_stop(local);
+ err_del_bss:
+ sdata->bss = NULL;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ mutex_lock(&local->mtx);
+ list_del(&sdata->u.vlan.list);
+ mutex_unlock(&local->mtx);
+ }
+ /* might already be clear but that doesn't matter */
+ clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+ return res;
+}

static void ieee80211_if_free(struct net_device *dev)
{
@@ -1332,32 +1356,6 @@ static void ieee80211_if_setup_no_queue(struct net_device *dev)
dev->priv_flags |= IFF_NO_QUEUE;
}

-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 =
--
2.28.0