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b6bf8c688e
By default, the rhashtable logic will fail to insert objects if the key-chains are too long and un-balanced. In the degenerate case where mac80211 is creating many virtual interfaces connected to the same peer(s), this case can happen. St insecure_elasticity to true to allow chains to grow as long as needed. Signed-off-by: Ben Greear <greearb@candelatech.com> [remove message, change commit message slightly] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2157 lines
58 KiB
C
2157 lines
58 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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* Copyright (C) 2015 Intel Deutschland GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/etherdevice.h>
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/timer.h>
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#include <linux/rtnetlink.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "sta_info.h"
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#include "debugfs_sta.h"
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#include "mesh.h"
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#include "wme.h"
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/**
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* DOC: STA information lifetime rules
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*
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* STA info structures (&struct sta_info) are managed in a hash table
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* for faster lookup and a list for iteration. They are managed using
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* RCU, i.e. access to the list and hash table is protected by RCU.
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*
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* Upon allocating a STA info structure with sta_info_alloc(), the caller
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* owns that structure. It must then insert it into the hash table using
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* either sta_info_insert() or sta_info_insert_rcu(); only in the latter
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* case (which acquires an rcu read section but must not be called from
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* within one) will the pointer still be valid after the call. Note that
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* the caller may not do much with the STA info before inserting it, in
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* particular, it may not start any mesh peer link management or add
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* encryption keys.
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*
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* When the insertion fails (sta_info_insert()) returns non-zero), the
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* structure will have been freed by sta_info_insert()!
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*
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* Station entries are added by mac80211 when you establish a link with a
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* peer. This means different things for the different type of interfaces
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* we support. For a regular station this mean we add the AP sta when we
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* receive an association response from the AP. For IBSS this occurs when
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* get to know about a peer on the same IBSS. For WDS we add the sta for
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* the peer immediately upon device open. When using AP mode we add stations
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* for each respective station upon request from userspace through nl80211.
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*
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* In order to remove a STA info structure, various sta_info_destroy_*()
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* calls are available.
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*
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* There is no concept of ownership on a STA entry, each structure is
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* owned by the global hash table/list until it is removed. All users of
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* the structure need to be RCU protected so that the structure won't be
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* freed before they are done using it.
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*/
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static const struct rhashtable_params sta_rht_params = {
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.nelem_hint = 3, /* start small */
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.insecure_elasticity = true, /* Disable chain-length checks. */
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.automatic_shrinking = true,
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.head_offset = offsetof(struct sta_info, hash_node),
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.key_offset = offsetof(struct sta_info, addr),
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.key_len = ETH_ALEN,
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.hashfn = sta_addr_hash,
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.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
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};
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/* Caller must hold local->sta_mtx */
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static int sta_info_hash_del(struct ieee80211_local *local,
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struct sta_info *sta)
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{
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return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node,
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sta_rht_params);
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}
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static void __cleanup_single_sta(struct sta_info *sta)
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{
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int ac, i;
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struct tid_ampdu_tx *tid_tx;
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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struct ieee80211_local *local = sdata->local;
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struct ps_data *ps;
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if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
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test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
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test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
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if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
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sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
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ps = &sdata->bss->ps;
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else if (ieee80211_vif_is_mesh(&sdata->vif))
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ps = &sdata->u.mesh.ps;
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else
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return;
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clear_sta_flag(sta, WLAN_STA_PS_STA);
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clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
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clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
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atomic_dec(&ps->num_sta_ps);
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}
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if (sta->sta.txq[0]) {
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for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
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struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
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int n = skb_queue_len(&txqi->queue);
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ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
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atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]);
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txqi->byte_cnt = 0;
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}
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}
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for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
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local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
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ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
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ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
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}
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if (ieee80211_vif_is_mesh(&sdata->vif))
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mesh_sta_cleanup(sta);
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cancel_work_sync(&sta->drv_deliver_wk);
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/*
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* Destroy aggregation state here. It would be nice to wait for the
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* driver to finish aggregation stop and then clean up, but for now
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* drivers have to handle aggregation stop being requested, followed
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* directly by station destruction.
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*/
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for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
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kfree(sta->ampdu_mlme.tid_start_tx[i]);
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tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
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if (!tid_tx)
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continue;
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ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
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kfree(tid_tx);
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}
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}
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static void cleanup_single_sta(struct sta_info *sta)
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{
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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struct ieee80211_local *local = sdata->local;
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__cleanup_single_sta(sta);
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sta_info_free(local, sta);
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}
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/* protected by RCU */
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struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
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const u8 *addr)
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{
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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struct rhash_head *tmp;
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const struct bucket_table *tbl;
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rcu_read_lock();
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tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
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for_each_sta_info(local, tbl, addr, sta, tmp) {
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if (sta->sdata == sdata) {
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rcu_read_unlock();
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/* this is safe as the caller must already hold
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* another rcu read section or the mutex
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*/
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return sta;
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}
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}
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rcu_read_unlock();
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return NULL;
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}
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/*
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* Get sta info either from the specified interface
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* or from one of its vlans
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*/
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struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
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const u8 *addr)
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{
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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struct rhash_head *tmp;
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const struct bucket_table *tbl;
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rcu_read_lock();
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tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
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for_each_sta_info(local, tbl, addr, sta, tmp) {
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if (sta->sdata == sdata ||
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(sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
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rcu_read_unlock();
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/* this is safe as the caller must already hold
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* another rcu read section or the mutex
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*/
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return sta;
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}
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}
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rcu_read_unlock();
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return NULL;
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}
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struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
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int idx)
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{
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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int i = 0;
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list_for_each_entry_rcu(sta, &local->sta_list, list) {
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if (sdata != sta->sdata)
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continue;
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if (i < idx) {
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++i;
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continue;
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}
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return sta;
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}
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return NULL;
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}
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/**
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* sta_info_free - free STA
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*
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* @local: pointer to the global information
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* @sta: STA info to free
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*
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* This function must undo everything done by sta_info_alloc()
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* that may happen before sta_info_insert(). It may only be
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* called when sta_info_insert() has not been attempted (and
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* if that fails, the station is freed anyway.)
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*/
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void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
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{
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if (sta->rate_ctrl)
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rate_control_free_sta(sta);
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sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
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if (sta->sta.txq[0])
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kfree(to_txq_info(sta->sta.txq[0]));
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kfree(rcu_dereference_raw(sta->sta.rates));
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#ifdef CONFIG_MAC80211_MESH
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kfree(sta->mesh);
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#endif
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kfree(sta);
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}
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/* Caller must hold local->sta_mtx */
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static int sta_info_hash_add(struct ieee80211_local *local,
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struct sta_info *sta)
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{
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return rhashtable_insert_fast(&local->sta_hash, &sta->hash_node,
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sta_rht_params);
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}
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static void sta_deliver_ps_frames(struct work_struct *wk)
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{
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struct sta_info *sta;
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sta = container_of(wk, struct sta_info, drv_deliver_wk);
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if (sta->dead)
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return;
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local_bh_disable();
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if (!test_sta_flag(sta, WLAN_STA_PS_STA))
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ieee80211_sta_ps_deliver_wakeup(sta);
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else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
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ieee80211_sta_ps_deliver_poll_response(sta);
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else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
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ieee80211_sta_ps_deliver_uapsd(sta);
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local_bh_enable();
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}
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static int sta_prepare_rate_control(struct ieee80211_local *local,
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struct sta_info *sta, gfp_t gfp)
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{
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if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
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return 0;
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sta->rate_ctrl = local->rate_ctrl;
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sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
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sta, gfp);
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if (!sta->rate_ctrl_priv)
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return -ENOMEM;
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return 0;
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}
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struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
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const u8 *addr, gfp_t gfp)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_hw *hw = &local->hw;
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struct sta_info *sta;
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int i;
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sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
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if (!sta)
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return NULL;
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spin_lock_init(&sta->lock);
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spin_lock_init(&sta->ps_lock);
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INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
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INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
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mutex_init(&sta->ampdu_mlme.mtx);
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#ifdef CONFIG_MAC80211_MESH
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if (ieee80211_vif_is_mesh(&sdata->vif)) {
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sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
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if (!sta->mesh)
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goto free;
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spin_lock_init(&sta->mesh->plink_lock);
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if (ieee80211_vif_is_mesh(&sdata->vif) &&
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!sdata->u.mesh.user_mpm)
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init_timer(&sta->mesh->plink_timer);
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sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
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}
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#endif
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memcpy(sta->addr, addr, ETH_ALEN);
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memcpy(sta->sta.addr, addr, ETH_ALEN);
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sta->local = local;
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sta->sdata = sdata;
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sta->rx_stats.last_rx = jiffies;
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sta->sta_state = IEEE80211_STA_NONE;
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/* Mark TID as unreserved */
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sta->reserved_tid = IEEE80211_TID_UNRESERVED;
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sta->last_connected = ktime_get_seconds();
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ewma_signal_init(&sta->rx_stats.avg_signal);
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for (i = 0; i < ARRAY_SIZE(sta->rx_stats.chain_signal_avg); i++)
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ewma_signal_init(&sta->rx_stats.chain_signal_avg[i]);
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if (local->ops->wake_tx_queue) {
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void *txq_data;
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int size = sizeof(struct txq_info) +
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ALIGN(hw->txq_data_size, sizeof(void *));
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txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
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if (!txq_data)
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goto free;
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for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
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struct txq_info *txq = txq_data + i * size;
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ieee80211_init_tx_queue(sdata, sta, txq, i);
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}
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}
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if (sta_prepare_rate_control(local, sta, gfp))
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goto free_txq;
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for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
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/*
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* timer_to_tid must be initialized with identity mapping
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* to enable session_timer's data differentiation. See
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* sta_rx_agg_session_timer_expired for usage.
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*/
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sta->timer_to_tid[i] = i;
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}
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for (i = 0; i < IEEE80211_NUM_ACS; i++) {
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skb_queue_head_init(&sta->ps_tx_buf[i]);
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skb_queue_head_init(&sta->tx_filtered[i]);
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}
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for (i = 0; i < IEEE80211_NUM_TIDS; i++)
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sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
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sta->sta.smps_mode = IEEE80211_SMPS_OFF;
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if (sdata->vif.type == NL80211_IFTYPE_AP ||
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sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
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struct ieee80211_supported_band *sband =
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hw->wiphy->bands[ieee80211_get_sdata_band(sdata)];
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u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
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IEEE80211_HT_CAP_SM_PS_SHIFT;
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/*
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* Assume that hostapd advertises our caps in the beacon and
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* this is the known_smps_mode for a station that just assciated
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*/
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switch (smps) {
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case WLAN_HT_SMPS_CONTROL_DISABLED:
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sta->known_smps_mode = IEEE80211_SMPS_OFF;
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break;
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case WLAN_HT_SMPS_CONTROL_STATIC:
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sta->known_smps_mode = IEEE80211_SMPS_STATIC;
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break;
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case WLAN_HT_SMPS_CONTROL_DYNAMIC:
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sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
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break;
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default:
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WARN_ON(1);
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}
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}
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sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
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return sta;
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free_txq:
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if (sta->sta.txq[0])
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kfree(to_txq_info(sta->sta.txq[0]));
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free:
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#ifdef CONFIG_MAC80211_MESH
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kfree(sta->mesh);
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#endif
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kfree(sta);
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return NULL;
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}
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static int sta_info_insert_check(struct sta_info *sta)
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{
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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/*
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* Can't be a WARN_ON because it can be triggered through a race:
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* something inserts a STA (on one CPU) without holding the RTNL
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* and another CPU turns off the net device.
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*/
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if (unlikely(!ieee80211_sdata_running(sdata)))
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return -ENETDOWN;
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if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
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is_multicast_ether_addr(sta->sta.addr)))
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return -EINVAL;
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/* Strictly speaking this isn't necessary as we hold the mutex, but
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* the rhashtable code can't really deal with that distinction. We
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* do require the mutex for correctness though.
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*/
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rcu_read_lock();
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lockdep_assert_held(&sdata->local->sta_mtx);
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if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
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ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
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rcu_read_unlock();
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return -ENOTUNIQ;
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}
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rcu_read_unlock();
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return 0;
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}
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static int sta_info_insert_drv_state(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct sta_info *sta)
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{
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enum ieee80211_sta_state state;
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int err = 0;
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for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
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err = drv_sta_state(local, sdata, sta, state, state + 1);
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if (err)
|
|
break;
|
|
}
|
|
|
|
if (!err) {
|
|
/*
|
|
* Drivers using legacy sta_add/sta_remove callbacks only
|
|
* get uploaded set to true after sta_add is called.
|
|
*/
|
|
if (!local->ops->sta_add)
|
|
sta->uploaded = true;
|
|
return 0;
|
|
}
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
|
sdata_info(sdata,
|
|
"failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
|
|
sta->sta.addr, state + 1, err);
|
|
err = 0;
|
|
}
|
|
|
|
/* unwind on error */
|
|
for (; state > IEEE80211_STA_NOTEXIST; state--)
|
|
WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* should be called with sta_mtx locked
|
|
* this function replaces the mutex lock
|
|
* with a RCU lock
|
|
*/
|
|
static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
|
|
{
|
|
struct ieee80211_local *local = sta->local;
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct station_info *sinfo;
|
|
int err = 0;
|
|
|
|
lockdep_assert_held(&local->sta_mtx);
|
|
|
|
sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
|
|
if (!sinfo) {
|
|
err = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
|
|
/* check if STA exists already */
|
|
if (sta_info_get_bss(sdata, sta->sta.addr)) {
|
|
err = -EEXIST;
|
|
goto out_err;
|
|
}
|
|
|
|
local->num_sta++;
|
|
local->sta_generation++;
|
|
smp_mb();
|
|
|
|
/* simplify things and don't accept BA sessions yet */
|
|
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
|
|
/* make the station visible */
|
|
err = sta_info_hash_add(local, sta);
|
|
if (err)
|
|
goto out_drop_sta;
|
|
|
|
list_add_tail_rcu(&sta->list, &local->sta_list);
|
|
|
|
/* notify driver */
|
|
err = sta_info_insert_drv_state(local, sdata, sta);
|
|
if (err)
|
|
goto out_remove;
|
|
|
|
set_sta_flag(sta, WLAN_STA_INSERTED);
|
|
/* accept BA sessions now */
|
|
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
|
|
ieee80211_sta_debugfs_add(sta);
|
|
rate_control_add_sta_debugfs(sta);
|
|
|
|
sinfo->generation = local->sta_generation;
|
|
cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
|
|
kfree(sinfo);
|
|
|
|
sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
|
|
|
|
/* move reference to rcu-protected */
|
|
rcu_read_lock();
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
mesh_accept_plinks_update(sdata);
|
|
|
|
return 0;
|
|
out_remove:
|
|
sta_info_hash_del(local, sta);
|
|
list_del_rcu(&sta->list);
|
|
out_drop_sta:
|
|
local->num_sta--;
|
|
synchronize_net();
|
|
__cleanup_single_sta(sta);
|
|
out_err:
|
|
mutex_unlock(&local->sta_mtx);
|
|
kfree(sinfo);
|
|
rcu_read_lock();
|
|
return err;
|
|
}
|
|
|
|
int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
|
|
{
|
|
struct ieee80211_local *local = sta->local;
|
|
int err;
|
|
|
|
might_sleep();
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
|
|
err = sta_info_insert_check(sta);
|
|
if (err) {
|
|
mutex_unlock(&local->sta_mtx);
|
|
rcu_read_lock();
|
|
goto out_free;
|
|
}
|
|
|
|
err = sta_info_insert_finish(sta);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
return 0;
|
|
out_free:
|
|
sta_info_free(local, sta);
|
|
return err;
|
|
}
|
|
|
|
int sta_info_insert(struct sta_info *sta)
|
|
{
|
|
int err = sta_info_insert_rcu(sta);
|
|
|
|
rcu_read_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline void __bss_tim_set(u8 *tim, u16 id)
|
|
{
|
|
/*
|
|
* This format has been mandated by the IEEE specifications,
|
|
* so this line may not be changed to use the __set_bit() format.
|
|
*/
|
|
tim[id / 8] |= (1 << (id % 8));
|
|
}
|
|
|
|
static inline void __bss_tim_clear(u8 *tim, u16 id)
|
|
{
|
|
/*
|
|
* This format has been mandated by the IEEE specifications,
|
|
* so this line may not be changed to use the __clear_bit() format.
|
|
*/
|
|
tim[id / 8] &= ~(1 << (id % 8));
|
|
}
|
|
|
|
static inline bool __bss_tim_get(u8 *tim, u16 id)
|
|
{
|
|
/*
|
|
* This format has been mandated by the IEEE specifications,
|
|
* so this line may not be changed to use the test_bit() format.
|
|
*/
|
|
return tim[id / 8] & (1 << (id % 8));
|
|
}
|
|
|
|
static unsigned long ieee80211_tids_for_ac(int ac)
|
|
{
|
|
/* If we ever support TIDs > 7, this obviously needs to be adjusted */
|
|
switch (ac) {
|
|
case IEEE80211_AC_VO:
|
|
return BIT(6) | BIT(7);
|
|
case IEEE80211_AC_VI:
|
|
return BIT(4) | BIT(5);
|
|
case IEEE80211_AC_BE:
|
|
return BIT(0) | BIT(3);
|
|
case IEEE80211_AC_BK:
|
|
return BIT(1) | BIT(2);
|
|
default:
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
|
|
{
|
|
struct ieee80211_local *local = sta->local;
|
|
struct ps_data *ps;
|
|
bool indicate_tim = false;
|
|
u8 ignore_for_tim = sta->sta.uapsd_queues;
|
|
int ac;
|
|
u16 id = sta->sta.aid;
|
|
|
|
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
|
|
sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
|
|
if (WARN_ON_ONCE(!sta->sdata->bss))
|
|
return;
|
|
|
|
ps = &sta->sdata->bss->ps;
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
} else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
|
|
ps = &sta->sdata->u.mesh.ps;
|
|
#endif
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
/* No need to do anything if the driver does all */
|
|
if (ieee80211_hw_check(&local->hw, AP_LINK_PS))
|
|
return;
|
|
|
|
if (sta->dead)
|
|
goto done;
|
|
|
|
/*
|
|
* If all ACs are delivery-enabled then we should build
|
|
* the TIM bit for all ACs anyway; if only some are then
|
|
* we ignore those and build the TIM bit using only the
|
|
* non-enabled ones.
|
|
*/
|
|
if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
|
|
ignore_for_tim = 0;
|
|
|
|
if (ignore_pending)
|
|
ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
unsigned long tids;
|
|
|
|
if (ignore_for_tim & BIT(ac))
|
|
continue;
|
|
|
|
indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
|
|
!skb_queue_empty(&sta->ps_tx_buf[ac]);
|
|
if (indicate_tim)
|
|
break;
|
|
|
|
tids = ieee80211_tids_for_ac(ac);
|
|
|
|
indicate_tim |=
|
|
sta->driver_buffered_tids & tids;
|
|
indicate_tim |=
|
|
sta->txq_buffered_tids & tids;
|
|
}
|
|
|
|
done:
|
|
spin_lock_bh(&local->tim_lock);
|
|
|
|
if (indicate_tim == __bss_tim_get(ps->tim, id))
|
|
goto out_unlock;
|
|
|
|
if (indicate_tim)
|
|
__bss_tim_set(ps->tim, id);
|
|
else
|
|
__bss_tim_clear(ps->tim, id);
|
|
|
|
if (local->ops->set_tim && !WARN_ON(sta->dead)) {
|
|
local->tim_in_locked_section = true;
|
|
drv_set_tim(local, &sta->sta, indicate_tim);
|
|
local->tim_in_locked_section = false;
|
|
}
|
|
|
|
out_unlock:
|
|
spin_unlock_bh(&local->tim_lock);
|
|
}
|
|
|
|
void sta_info_recalc_tim(struct sta_info *sta)
|
|
{
|
|
__sta_info_recalc_tim(sta, false);
|
|
}
|
|
|
|
static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tx_info *info;
|
|
int timeout;
|
|
|
|
if (!skb)
|
|
return false;
|
|
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
/* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
|
|
timeout = (sta->listen_interval *
|
|
sta->sdata->vif.bss_conf.beacon_int *
|
|
32 / 15625) * HZ;
|
|
if (timeout < STA_TX_BUFFER_EXPIRE)
|
|
timeout = STA_TX_BUFFER_EXPIRE;
|
|
return time_after(jiffies, info->control.jiffies + timeout);
|
|
}
|
|
|
|
|
|
static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
|
|
struct sta_info *sta, int ac)
|
|
{
|
|
unsigned long flags;
|
|
struct sk_buff *skb;
|
|
|
|
/*
|
|
* First check for frames that should expire on the filtered
|
|
* queue. Frames here were rejected by the driver and are on
|
|
* a separate queue to avoid reordering with normal PS-buffered
|
|
* frames. They also aren't accounted for right now in the
|
|
* total_ps_buffered counter.
|
|
*/
|
|
for (;;) {
|
|
spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
|
|
skb = skb_peek(&sta->tx_filtered[ac]);
|
|
if (sta_info_buffer_expired(sta, skb))
|
|
skb = __skb_dequeue(&sta->tx_filtered[ac]);
|
|
else
|
|
skb = NULL;
|
|
spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
|
|
|
|
/*
|
|
* Frames are queued in order, so if this one
|
|
* hasn't expired yet we can stop testing. If
|
|
* we actually reached the end of the queue we
|
|
* also need to stop, of course.
|
|
*/
|
|
if (!skb)
|
|
break;
|
|
ieee80211_free_txskb(&local->hw, skb);
|
|
}
|
|
|
|
/*
|
|
* Now also check the normal PS-buffered queue, this will
|
|
* only find something if the filtered queue was emptied
|
|
* since the filtered frames are all before the normal PS
|
|
* buffered frames.
|
|
*/
|
|
for (;;) {
|
|
spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
|
|
skb = skb_peek(&sta->ps_tx_buf[ac]);
|
|
if (sta_info_buffer_expired(sta, skb))
|
|
skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
|
|
else
|
|
skb = NULL;
|
|
spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
|
|
|
|
/*
|
|
* frames are queued in order, so if this one
|
|
* hasn't expired yet (or we reached the end of
|
|
* the queue) we can stop testing
|
|
*/
|
|
if (!skb)
|
|
break;
|
|
|
|
local->total_ps_buffered--;
|
|
ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
|
|
sta->sta.addr);
|
|
ieee80211_free_txskb(&local->hw, skb);
|
|
}
|
|
|
|
/*
|
|
* Finally, recalculate the TIM bit for this station -- it might
|
|
* now be clear because the station was too slow to retrieve its
|
|
* frames.
|
|
*/
|
|
sta_info_recalc_tim(sta);
|
|
|
|
/*
|
|
* Return whether there are any frames still buffered, this is
|
|
* used to check whether the cleanup timer still needs to run,
|
|
* if there are no frames we don't need to rearm the timer.
|
|
*/
|
|
return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
|
|
skb_queue_empty(&sta->tx_filtered[ac]));
|
|
}
|
|
|
|
static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
|
|
struct sta_info *sta)
|
|
{
|
|
bool have_buffered = false;
|
|
int ac;
|
|
|
|
/* This is only necessary for stations on BSS/MBSS interfaces */
|
|
if (!sta->sdata->bss &&
|
|
!ieee80211_vif_is_mesh(&sta->sdata->vif))
|
|
return false;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
|
|
have_buffered |=
|
|
sta_info_cleanup_expire_buffered_ac(local, sta, ac);
|
|
|
|
return have_buffered;
|
|
}
|
|
|
|
static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_local *local;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
int ret;
|
|
|
|
might_sleep();
|
|
|
|
if (!sta)
|
|
return -ENOENT;
|
|
|
|
local = sta->local;
|
|
sdata = sta->sdata;
|
|
|
|
lockdep_assert_held(&local->sta_mtx);
|
|
|
|
/*
|
|
* Before removing the station from the driver and
|
|
* rate control, it might still start new aggregation
|
|
* sessions -- block that to make sure the tear-down
|
|
* will be sufficient.
|
|
*/
|
|
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
|
|
|
|
ret = sta_info_hash_del(local, sta);
|
|
if (WARN_ON(ret))
|
|
return ret;
|
|
|
|
/*
|
|
* for TDLS peers, make sure to return to the base channel before
|
|
* removal.
|
|
*/
|
|
if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
|
|
drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
|
|
clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
|
|
}
|
|
|
|
list_del_rcu(&sta->list);
|
|
sta->removed = true;
|
|
|
|
drv_sta_pre_rcu_remove(local, sta->sdata, sta);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
|
|
rcu_access_pointer(sdata->u.vlan.sta) == sta)
|
|
RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __sta_info_destroy_part2(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_local *local = sta->local;
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct station_info *sinfo;
|
|
int ret;
|
|
|
|
/*
|
|
* NOTE: This assumes at least synchronize_net() was done
|
|
* after _part1 and before _part2!
|
|
*/
|
|
|
|
might_sleep();
|
|
lockdep_assert_held(&local->sta_mtx);
|
|
|
|
/* now keys can no longer be reached */
|
|
ieee80211_free_sta_keys(local, sta);
|
|
|
|
/* disable TIM bit - last chance to tell driver */
|
|
__sta_info_recalc_tim(sta, true);
|
|
|
|
sta->dead = true;
|
|
|
|
local->num_sta--;
|
|
local->sta_generation++;
|
|
|
|
while (sta->sta_state > IEEE80211_STA_NONE) {
|
|
ret = sta_info_move_state(sta, sta->sta_state - 1);
|
|
if (ret) {
|
|
WARN_ON_ONCE(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (sta->uploaded) {
|
|
ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
|
|
IEEE80211_STA_NOTEXIST);
|
|
WARN_ON_ONCE(ret != 0);
|
|
}
|
|
|
|
sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
|
|
|
|
sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
|
|
if (sinfo)
|
|
sta_set_sinfo(sta, sinfo);
|
|
cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
|
|
kfree(sinfo);
|
|
|
|
rate_control_remove_sta_debugfs(sta);
|
|
ieee80211_sta_debugfs_remove(sta);
|
|
|
|
cleanup_single_sta(sta);
|
|
}
|
|
|
|
int __must_check __sta_info_destroy(struct sta_info *sta)
|
|
{
|
|
int err = __sta_info_destroy_part1(sta);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
synchronize_net();
|
|
|
|
__sta_info_destroy_part2(sta);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
|
|
{
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
mutex_lock(&sdata->local->sta_mtx);
|
|
sta = sta_info_get(sdata, addr);
|
|
ret = __sta_info_destroy(sta);
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr)
|
|
{
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
mutex_lock(&sdata->local->sta_mtx);
|
|
sta = sta_info_get_bss(sdata, addr);
|
|
ret = __sta_info_destroy(sta);
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sta_info_cleanup(unsigned long data)
|
|
{
|
|
struct ieee80211_local *local = (struct ieee80211_local *) data;
|
|
struct sta_info *sta;
|
|
bool timer_needed = false;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sta, &local->sta_list, list)
|
|
if (sta_info_cleanup_expire_buffered(local, sta))
|
|
timer_needed = true;
|
|
rcu_read_unlock();
|
|
|
|
if (local->quiescing)
|
|
return;
|
|
|
|
if (!timer_needed)
|
|
return;
|
|
|
|
mod_timer(&local->sta_cleanup,
|
|
round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
|
|
}
|
|
|
|
u32 sta_addr_hash(const void *key, u32 length, u32 seed)
|
|
{
|
|
return jhash(key, ETH_ALEN, seed);
|
|
}
|
|
|
|
int sta_info_init(struct ieee80211_local *local)
|
|
{
|
|
int err;
|
|
|
|
err = rhashtable_init(&local->sta_hash, &sta_rht_params);
|
|
if (err)
|
|
return err;
|
|
|
|
spin_lock_init(&local->tim_lock);
|
|
mutex_init(&local->sta_mtx);
|
|
INIT_LIST_HEAD(&local->sta_list);
|
|
|
|
setup_timer(&local->sta_cleanup, sta_info_cleanup,
|
|
(unsigned long)local);
|
|
return 0;
|
|
}
|
|
|
|
void sta_info_stop(struct ieee80211_local *local)
|
|
{
|
|
del_timer_sync(&local->sta_cleanup);
|
|
rhashtable_destroy(&local->sta_hash);
|
|
}
|
|
|
|
|
|
int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta, *tmp;
|
|
LIST_HEAD(free_list);
|
|
int ret = 0;
|
|
|
|
might_sleep();
|
|
|
|
WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
|
|
WARN_ON(vlans && !sdata->bss);
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
|
|
if (sdata == sta->sdata ||
|
|
(vlans && sdata->bss == sta->sdata->bss)) {
|
|
if (!WARN_ON(__sta_info_destroy_part1(sta)))
|
|
list_add(&sta->free_list, &free_list);
|
|
ret++;
|
|
}
|
|
}
|
|
|
|
if (!list_empty(&free_list)) {
|
|
synchronize_net();
|
|
list_for_each_entry_safe(sta, tmp, &free_list, free_list)
|
|
__sta_info_destroy_part2(sta);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
|
|
unsigned long exp_time)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta, *tmp;
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
|
|
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
|
|
if (sdata != sta->sdata)
|
|
continue;
|
|
|
|
if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) {
|
|
sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
|
|
sta->sta.addr);
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif) &&
|
|
test_sta_flag(sta, WLAN_STA_PS_STA))
|
|
atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
|
|
|
|
WARN_ON(__sta_info_destroy(sta));
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
|
|
struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
|
|
const u8 *addr,
|
|
const u8 *localaddr)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct sta_info *sta;
|
|
struct rhash_head *tmp;
|
|
const struct bucket_table *tbl;
|
|
|
|
tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
|
|
|
|
/*
|
|
* Just return a random station if localaddr is NULL
|
|
* ... first in list.
|
|
*/
|
|
for_each_sta_info(local, tbl, addr, sta, tmp) {
|
|
if (localaddr &&
|
|
!ether_addr_equal(sta->sdata->vif.addr, localaddr))
|
|
continue;
|
|
if (!sta->uploaded)
|
|
return NULL;
|
|
return &sta->sta;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
|
|
|
|
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
|
|
const u8 *addr)
|
|
{
|
|
struct sta_info *sta;
|
|
|
|
if (!vif)
|
|
return NULL;
|
|
|
|
sta = sta_info_get_bss(vif_to_sdata(vif), addr);
|
|
if (!sta)
|
|
return NULL;
|
|
|
|
if (!sta->uploaded)
|
|
return NULL;
|
|
|
|
return &sta->sta;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_find_sta);
|
|
|
|
/* powersave support code */
|
|
void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff_head pending;
|
|
int filtered = 0, buffered = 0, ac, i;
|
|
unsigned long flags;
|
|
struct ps_data *ps;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
|
|
sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
|
|
u.ap);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
ps = &sdata->bss->ps;
|
|
else if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
ps = &sdata->u.mesh.ps;
|
|
else
|
|
return;
|
|
|
|
clear_sta_flag(sta, WLAN_STA_SP);
|
|
|
|
BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
|
|
sta->driver_buffered_tids = 0;
|
|
sta->txq_buffered_tids = 0;
|
|
|
|
if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
|
|
drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
|
|
|
|
if (sta->sta.txq[0]) {
|
|
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
|
|
struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
|
|
|
|
if (!skb_queue_len(&txqi->queue))
|
|
continue;
|
|
|
|
drv_wake_tx_queue(local, txqi);
|
|
}
|
|
}
|
|
|
|
skb_queue_head_init(&pending);
|
|
|
|
/* sync with ieee80211_tx_h_unicast_ps_buf */
|
|
spin_lock(&sta->ps_lock);
|
|
/* Send all buffered frames to the station */
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
int count = skb_queue_len(&pending), tmp;
|
|
|
|
spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
|
|
skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
|
|
spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
|
|
tmp = skb_queue_len(&pending);
|
|
filtered += tmp - count;
|
|
count = tmp;
|
|
|
|
spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
|
|
skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
|
|
spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
|
|
tmp = skb_queue_len(&pending);
|
|
buffered += tmp - count;
|
|
}
|
|
|
|
ieee80211_add_pending_skbs(local, &pending);
|
|
|
|
/* now we're no longer in the deliver code */
|
|
clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
|
|
|
|
/* The station might have polled and then woken up before we responded,
|
|
* so clear these flags now to avoid them sticking around.
|
|
*/
|
|
clear_sta_flag(sta, WLAN_STA_PSPOLL);
|
|
clear_sta_flag(sta, WLAN_STA_UAPSD);
|
|
spin_unlock(&sta->ps_lock);
|
|
|
|
atomic_dec(&ps->num_sta_ps);
|
|
|
|
/* This station just woke up and isn't aware of our SMPS state */
|
|
if (!ieee80211_vif_is_mesh(&sdata->vif) &&
|
|
!ieee80211_smps_is_restrictive(sta->known_smps_mode,
|
|
sdata->smps_mode) &&
|
|
sta->known_smps_mode != sdata->bss->req_smps &&
|
|
sta_info_tx_streams(sta) != 1) {
|
|
ht_dbg(sdata,
|
|
"%pM just woke up and MIMO capable - update SMPS\n",
|
|
sta->sta.addr);
|
|
ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
|
|
sta->sta.addr,
|
|
sdata->vif.bss_conf.bssid);
|
|
}
|
|
|
|
local->total_ps_buffered -= buffered;
|
|
|
|
sta_info_recalc_tim(sta);
|
|
|
|
ps_dbg(sdata,
|
|
"STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
|
|
sta->sta.addr, sta->sta.aid, filtered, buffered);
|
|
|
|
ieee80211_check_fast_xmit(sta);
|
|
}
|
|
|
|
static void ieee80211_send_null_response(struct sta_info *sta, int tid,
|
|
enum ieee80211_frame_release_type reason,
|
|
bool call_driver, bool more_data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_qos_hdr *nullfunc;
|
|
struct sk_buff *skb;
|
|
int size = sizeof(*nullfunc);
|
|
__le16 fc;
|
|
bool qos = sta->sta.wme;
|
|
struct ieee80211_tx_info *info;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
|
|
if (qos) {
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
|
|
IEEE80211_STYPE_QOS_NULLFUNC |
|
|
IEEE80211_FCTL_FROMDS);
|
|
} else {
|
|
size -= 2;
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
|
|
IEEE80211_STYPE_NULLFUNC |
|
|
IEEE80211_FCTL_FROMDS);
|
|
}
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
nullfunc = (void *) skb_put(skb, size);
|
|
nullfunc->frame_control = fc;
|
|
nullfunc->duration_id = 0;
|
|
memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
|
|
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
|
|
nullfunc->seq_ctrl = 0;
|
|
|
|
skb->priority = tid;
|
|
skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
|
|
if (qos) {
|
|
nullfunc->qos_ctrl = cpu_to_le16(tid);
|
|
|
|
if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
|
|
nullfunc->qos_ctrl |=
|
|
cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
|
|
if (more_data)
|
|
nullfunc->frame_control |=
|
|
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
|
|
}
|
|
}
|
|
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
/*
|
|
* Tell TX path to send this frame even though the
|
|
* STA may still remain is PS mode after this frame
|
|
* exchange. Also set EOSP to indicate this packet
|
|
* ends the poll/service period.
|
|
*/
|
|
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
|
|
IEEE80211_TX_STATUS_EOSP |
|
|
IEEE80211_TX_CTL_REQ_TX_STATUS;
|
|
|
|
info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
|
|
|
|
if (call_driver)
|
|
drv_allow_buffered_frames(local, sta, BIT(tid), 1,
|
|
reason, false);
|
|
|
|
skb->dev = sdata->dev;
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (WARN_ON(!chanctx_conf)) {
|
|
rcu_read_unlock();
|
|
kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
info->band = chanctx_conf->def.chan->band;
|
|
ieee80211_xmit(sdata, sta, skb);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int find_highest_prio_tid(unsigned long tids)
|
|
{
|
|
/* lower 3 TIDs aren't ordered perfectly */
|
|
if (tids & 0xF8)
|
|
return fls(tids) - 1;
|
|
/* TID 0 is BE just like TID 3 */
|
|
if (tids & BIT(0))
|
|
return 0;
|
|
return fls(tids) - 1;
|
|
}
|
|
|
|
/* Indicates if the MORE_DATA bit should be set in the last
|
|
* frame obtained by ieee80211_sta_ps_get_frames.
|
|
* Note that driver_release_tids is relevant only if
|
|
* reason = IEEE80211_FRAME_RELEASE_PSPOLL
|
|
*/
|
|
static bool
|
|
ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
|
|
enum ieee80211_frame_release_type reason,
|
|
unsigned long driver_release_tids)
|
|
{
|
|
int ac;
|
|
|
|
/* If the driver has data on more than one TID then
|
|
* certainly there's more data if we release just a
|
|
* single frame now (from a single TID). This will
|
|
* only happen for PS-Poll.
|
|
*/
|
|
if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
|
|
hweight16(driver_release_tids) > 1)
|
|
return true;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
if (ignored_acs & BIT(ac))
|
|
continue;
|
|
|
|
if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
|
|
!skb_queue_empty(&sta->ps_tx_buf[ac]))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
|
|
enum ieee80211_frame_release_type reason,
|
|
struct sk_buff_head *frames,
|
|
unsigned long *driver_release_tids)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
int ac;
|
|
|
|
/* Get response frame(s) and more data bit for the last one. */
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
unsigned long tids;
|
|
|
|
if (ignored_acs & BIT(ac))
|
|
continue;
|
|
|
|
tids = ieee80211_tids_for_ac(ac);
|
|
|
|
/* if we already have frames from software, then we can't also
|
|
* release from hardware queues
|
|
*/
|
|
if (skb_queue_empty(frames)) {
|
|
*driver_release_tids |=
|
|
sta->driver_buffered_tids & tids;
|
|
*driver_release_tids |= sta->txq_buffered_tids & tids;
|
|
}
|
|
|
|
if (!*driver_release_tids) {
|
|
struct sk_buff *skb;
|
|
|
|
while (n_frames > 0) {
|
|
skb = skb_dequeue(&sta->tx_filtered[ac]);
|
|
if (!skb) {
|
|
skb = skb_dequeue(
|
|
&sta->ps_tx_buf[ac]);
|
|
if (skb)
|
|
local->total_ps_buffered--;
|
|
}
|
|
if (!skb)
|
|
break;
|
|
n_frames--;
|
|
__skb_queue_tail(frames, skb);
|
|
}
|
|
}
|
|
|
|
/* If we have more frames buffered on this AC, then abort the
|
|
* loop since we can't send more data from other ACs before
|
|
* the buffered frames from this.
|
|
*/
|
|
if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
|
|
!skb_queue_empty(&sta->ps_tx_buf[ac]))
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ieee80211_sta_ps_deliver_response(struct sta_info *sta,
|
|
int n_frames, u8 ignored_acs,
|
|
enum ieee80211_frame_release_type reason)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
unsigned long driver_release_tids = 0;
|
|
struct sk_buff_head frames;
|
|
bool more_data;
|
|
|
|
/* Service or PS-Poll period starts */
|
|
set_sta_flag(sta, WLAN_STA_SP);
|
|
|
|
__skb_queue_head_init(&frames);
|
|
|
|
ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
|
|
&frames, &driver_release_tids);
|
|
|
|
more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
|
|
|
|
if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
|
|
driver_release_tids =
|
|
BIT(find_highest_prio_tid(driver_release_tids));
|
|
|
|
if (skb_queue_empty(&frames) && !driver_release_tids) {
|
|
int tid;
|
|
|
|
/*
|
|
* For PS-Poll, this can only happen due to a race condition
|
|
* when we set the TIM bit and the station notices it, but
|
|
* before it can poll for the frame we expire it.
|
|
*
|
|
* For uAPSD, this is said in the standard (11.2.1.5 h):
|
|
* At each unscheduled SP for a non-AP STA, the AP shall
|
|
* attempt to transmit at least one MSDU or MMPDU, but no
|
|
* more than the value specified in the Max SP Length field
|
|
* in the QoS Capability element from delivery-enabled ACs,
|
|
* that are destined for the non-AP STA.
|
|
*
|
|
* Since we have no other MSDU/MMPDU, transmit a QoS null frame.
|
|
*/
|
|
|
|
/* This will evaluate to 1, 3, 5 or 7. */
|
|
tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
|
|
|
|
ieee80211_send_null_response(sta, tid, reason, true, false);
|
|
} else if (!driver_release_tids) {
|
|
struct sk_buff_head pending;
|
|
struct sk_buff *skb;
|
|
int num = 0;
|
|
u16 tids = 0;
|
|
bool need_null = false;
|
|
|
|
skb_queue_head_init(&pending);
|
|
|
|
while ((skb = __skb_dequeue(&frames))) {
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_hdr *hdr = (void *) skb->data;
|
|
u8 *qoshdr = NULL;
|
|
|
|
num++;
|
|
|
|
/*
|
|
* Tell TX path to send this frame even though the
|
|
* STA may still remain is PS mode after this frame
|
|
* exchange.
|
|
*/
|
|
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
|
|
info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
|
|
|
|
/*
|
|
* Use MoreData flag to indicate whether there are
|
|
* more buffered frames for this STA
|
|
*/
|
|
if (more_data || !skb_queue_empty(&frames))
|
|
hdr->frame_control |=
|
|
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
|
|
else
|
|
hdr->frame_control &=
|
|
cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
|
|
|
|
if (ieee80211_is_data_qos(hdr->frame_control) ||
|
|
ieee80211_is_qos_nullfunc(hdr->frame_control))
|
|
qoshdr = ieee80211_get_qos_ctl(hdr);
|
|
|
|
tids |= BIT(skb->priority);
|
|
|
|
__skb_queue_tail(&pending, skb);
|
|
|
|
/* end service period after last frame or add one */
|
|
if (!skb_queue_empty(&frames))
|
|
continue;
|
|
|
|
if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
|
|
/* for PS-Poll, there's only one frame */
|
|
info->flags |= IEEE80211_TX_STATUS_EOSP |
|
|
IEEE80211_TX_CTL_REQ_TX_STATUS;
|
|
break;
|
|
}
|
|
|
|
/* For uAPSD, things are a bit more complicated. If the
|
|
* last frame has a QoS header (i.e. is a QoS-data or
|
|
* QoS-nulldata frame) then just set the EOSP bit there
|
|
* and be done.
|
|
* If the frame doesn't have a QoS header (which means
|
|
* it should be a bufferable MMPDU) then we can't set
|
|
* the EOSP bit in the QoS header; add a QoS-nulldata
|
|
* frame to the list to send it after the MMPDU.
|
|
*
|
|
* Note that this code is only in the mac80211-release
|
|
* code path, we assume that the driver will not buffer
|
|
* anything but QoS-data frames, or if it does, will
|
|
* create the QoS-nulldata frame by itself if needed.
|
|
*
|
|
* Cf. 802.11-2012 10.2.1.10 (c).
|
|
*/
|
|
if (qoshdr) {
|
|
*qoshdr |= IEEE80211_QOS_CTL_EOSP;
|
|
|
|
info->flags |= IEEE80211_TX_STATUS_EOSP |
|
|
IEEE80211_TX_CTL_REQ_TX_STATUS;
|
|
} else {
|
|
/* The standard isn't completely clear on this
|
|
* as it says the more-data bit should be set
|
|
* if there are more BUs. The QoS-Null frame
|
|
* we're about to send isn't buffered yet, we
|
|
* only create it below, but let's pretend it
|
|
* was buffered just in case some clients only
|
|
* expect more-data=0 when eosp=1.
|
|
*/
|
|
hdr->frame_control |=
|
|
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
|
|
need_null = true;
|
|
num++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
drv_allow_buffered_frames(local, sta, tids, num,
|
|
reason, more_data);
|
|
|
|
ieee80211_add_pending_skbs(local, &pending);
|
|
|
|
if (need_null)
|
|
ieee80211_send_null_response(
|
|
sta, find_highest_prio_tid(tids),
|
|
reason, false, false);
|
|
|
|
sta_info_recalc_tim(sta);
|
|
} else {
|
|
unsigned long tids = sta->txq_buffered_tids & driver_release_tids;
|
|
int tid;
|
|
|
|
/*
|
|
* We need to release a frame that is buffered somewhere in the
|
|
* driver ... it'll have to handle that.
|
|
* Note that the driver also has to check the number of frames
|
|
* on the TIDs we're releasing from - if there are more than
|
|
* n_frames it has to set the more-data bit (if we didn't ask
|
|
* it to set it anyway due to other buffered frames); if there
|
|
* are fewer than n_frames it has to make sure to adjust that
|
|
* to allow the service period to end properly.
|
|
*/
|
|
drv_release_buffered_frames(local, sta, driver_release_tids,
|
|
n_frames, reason, more_data);
|
|
|
|
/*
|
|
* Note that we don't recalculate the TIM bit here as it would
|
|
* most likely have no effect at all unless the driver told us
|
|
* that the TID(s) became empty before returning here from the
|
|
* release function.
|
|
* Either way, however, when the driver tells us that the TID(s)
|
|
* became empty or we find that a txq became empty, we'll do the
|
|
* TIM recalculation.
|
|
*/
|
|
|
|
if (!sta->sta.txq[0])
|
|
return;
|
|
|
|
for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
|
|
struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]);
|
|
|
|
if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue))
|
|
continue;
|
|
|
|
sta_info_recalc_tim(sta);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
|
|
{
|
|
u8 ignore_for_response = sta->sta.uapsd_queues;
|
|
|
|
/*
|
|
* If all ACs are delivery-enabled then we should reply
|
|
* from any of them, if only some are enabled we reply
|
|
* only from the non-enabled ones.
|
|
*/
|
|
if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
|
|
ignore_for_response = 0;
|
|
|
|
ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
|
|
IEEE80211_FRAME_RELEASE_PSPOLL);
|
|
}
|
|
|
|
void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
|
|
{
|
|
int n_frames = sta->sta.max_sp;
|
|
u8 delivery_enabled = sta->sta.uapsd_queues;
|
|
|
|
/*
|
|
* If we ever grow support for TSPEC this might happen if
|
|
* the TSPEC update from hostapd comes in between a trigger
|
|
* frame setting WLAN_STA_UAPSD in the RX path and this
|
|
* actually getting called.
|
|
*/
|
|
if (!delivery_enabled)
|
|
return;
|
|
|
|
switch (sta->sta.max_sp) {
|
|
case 1:
|
|
n_frames = 2;
|
|
break;
|
|
case 2:
|
|
n_frames = 4;
|
|
break;
|
|
case 3:
|
|
n_frames = 6;
|
|
break;
|
|
case 0:
|
|
/* XXX: what is a good value? */
|
|
n_frames = 128;
|
|
break;
|
|
}
|
|
|
|
ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
|
|
IEEE80211_FRAME_RELEASE_UAPSD);
|
|
}
|
|
|
|
void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
|
|
struct ieee80211_sta *pubsta, bool block)
|
|
{
|
|
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
|
|
|
|
trace_api_sta_block_awake(sta->local, pubsta, block);
|
|
|
|
if (block) {
|
|
set_sta_flag(sta, WLAN_STA_PS_DRIVER);
|
|
ieee80211_clear_fast_xmit(sta);
|
|
return;
|
|
}
|
|
|
|
if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
|
|
return;
|
|
|
|
if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
|
|
set_sta_flag(sta, WLAN_STA_PS_DELIVER);
|
|
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
|
|
ieee80211_queue_work(hw, &sta->drv_deliver_wk);
|
|
} else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
|
|
test_sta_flag(sta, WLAN_STA_UAPSD)) {
|
|
/* must be asleep in this case */
|
|
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
|
|
ieee80211_queue_work(hw, &sta->drv_deliver_wk);
|
|
} else {
|
|
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
|
|
ieee80211_check_fast_xmit(sta);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_sta_block_awake);
|
|
|
|
void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
|
|
{
|
|
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
|
|
struct ieee80211_local *local = sta->local;
|
|
|
|
trace_api_eosp(local, pubsta);
|
|
|
|
clear_sta_flag(sta, WLAN_STA_SP);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_sta_eosp);
|
|
|
|
void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
|
|
{
|
|
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
|
|
enum ieee80211_frame_release_type reason;
|
|
bool more_data;
|
|
|
|
trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
|
|
|
|
reason = IEEE80211_FRAME_RELEASE_UAPSD;
|
|
more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
|
|
reason, 0);
|
|
|
|
ieee80211_send_null_response(sta, tid, reason, false, more_data);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
|
|
|
|
void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
|
|
u8 tid, bool buffered)
|
|
{
|
|
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
|
|
|
|
if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
|
|
return;
|
|
|
|
trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
|
|
|
|
if (buffered)
|
|
set_bit(tid, &sta->driver_buffered_tids);
|
|
else
|
|
clear_bit(tid, &sta->driver_buffered_tids);
|
|
|
|
sta_info_recalc_tim(sta);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_sta_set_buffered);
|
|
|
|
int sta_info_move_state(struct sta_info *sta,
|
|
enum ieee80211_sta_state new_state)
|
|
{
|
|
might_sleep();
|
|
|
|
if (sta->sta_state == new_state)
|
|
return 0;
|
|
|
|
/* check allowed transitions first */
|
|
|
|
switch (new_state) {
|
|
case IEEE80211_STA_NONE:
|
|
if (sta->sta_state != IEEE80211_STA_AUTH)
|
|
return -EINVAL;
|
|
break;
|
|
case IEEE80211_STA_AUTH:
|
|
if (sta->sta_state != IEEE80211_STA_NONE &&
|
|
sta->sta_state != IEEE80211_STA_ASSOC)
|
|
return -EINVAL;
|
|
break;
|
|
case IEEE80211_STA_ASSOC:
|
|
if (sta->sta_state != IEEE80211_STA_AUTH &&
|
|
sta->sta_state != IEEE80211_STA_AUTHORIZED)
|
|
return -EINVAL;
|
|
break;
|
|
case IEEE80211_STA_AUTHORIZED:
|
|
if (sta->sta_state != IEEE80211_STA_ASSOC)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
WARN(1, "invalid state %d", new_state);
|
|
return -EINVAL;
|
|
}
|
|
|
|
sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
|
|
sta->sta.addr, new_state);
|
|
|
|
/*
|
|
* notify the driver before the actual changes so it can
|
|
* fail the transition
|
|
*/
|
|
if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
|
|
int err = drv_sta_state(sta->local, sta->sdata, sta,
|
|
sta->sta_state, new_state);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* reflect the change in all state variables */
|
|
|
|
switch (new_state) {
|
|
case IEEE80211_STA_NONE:
|
|
if (sta->sta_state == IEEE80211_STA_AUTH)
|
|
clear_bit(WLAN_STA_AUTH, &sta->_flags);
|
|
break;
|
|
case IEEE80211_STA_AUTH:
|
|
if (sta->sta_state == IEEE80211_STA_NONE) {
|
|
set_bit(WLAN_STA_AUTH, &sta->_flags);
|
|
} else if (sta->sta_state == IEEE80211_STA_ASSOC) {
|
|
clear_bit(WLAN_STA_ASSOC, &sta->_flags);
|
|
ieee80211_recalc_min_chandef(sta->sdata);
|
|
}
|
|
break;
|
|
case IEEE80211_STA_ASSOC:
|
|
if (sta->sta_state == IEEE80211_STA_AUTH) {
|
|
set_bit(WLAN_STA_ASSOC, &sta->_flags);
|
|
ieee80211_recalc_min_chandef(sta->sdata);
|
|
} else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
|
|
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
|
|
(sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
|
|
!sta->sdata->u.vlan.sta))
|
|
atomic_dec(&sta->sdata->bss->num_mcast_sta);
|
|
clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
|
|
ieee80211_clear_fast_xmit(sta);
|
|
}
|
|
break;
|
|
case IEEE80211_STA_AUTHORIZED:
|
|
if (sta->sta_state == IEEE80211_STA_ASSOC) {
|
|
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
|
|
(sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
|
|
!sta->sdata->u.vlan.sta))
|
|
atomic_inc(&sta->sdata->bss->num_mcast_sta);
|
|
set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
|
|
ieee80211_check_fast_xmit(sta);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
sta->sta_state = new_state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 sta_info_tx_streams(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
|
|
u8 rx_streams;
|
|
|
|
if (!sta->sta.ht_cap.ht_supported)
|
|
return 1;
|
|
|
|
if (sta->sta.vht_cap.vht_supported) {
|
|
int i;
|
|
u16 tx_mcs_map =
|
|
le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
|
|
|
|
for (i = 7; i >= 0; i--)
|
|
if ((tx_mcs_map & (0x3 << (i * 2))) !=
|
|
IEEE80211_VHT_MCS_NOT_SUPPORTED)
|
|
return i + 1;
|
|
}
|
|
|
|
if (ht_cap->mcs.rx_mask[3])
|
|
rx_streams = 4;
|
|
else if (ht_cap->mcs.rx_mask[2])
|
|
rx_streams = 3;
|
|
else if (ht_cap->mcs.rx_mask[1])
|
|
rx_streams = 2;
|
|
else
|
|
rx_streams = 1;
|
|
|
|
if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
|
|
return rx_streams;
|
|
|
|
return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
|
|
>> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
|
|
}
|
|
|
|
static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
|
|
{
|
|
rinfo->flags = 0;
|
|
|
|
if (sta->rx_stats.last_rate_flag & RX_FLAG_HT) {
|
|
rinfo->flags |= RATE_INFO_FLAGS_MCS;
|
|
rinfo->mcs = sta->rx_stats.last_rate_idx;
|
|
} else if (sta->rx_stats.last_rate_flag & RX_FLAG_VHT) {
|
|
rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
|
|
rinfo->nss = sta->rx_stats.last_rate_vht_nss;
|
|
rinfo->mcs = sta->rx_stats.last_rate_idx;
|
|
} else {
|
|
struct ieee80211_supported_band *sband;
|
|
int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
|
|
u16 brate;
|
|
|
|
sband = sta->local->hw.wiphy->bands[
|
|
ieee80211_get_sdata_band(sta->sdata)];
|
|
brate = sband->bitrates[sta->rx_stats.last_rate_idx].bitrate;
|
|
rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
|
|
}
|
|
|
|
if (sta->rx_stats.last_rate_flag & RX_FLAG_SHORT_GI)
|
|
rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
|
|
|
|
if (sta->rx_stats.last_rate_flag & RX_FLAG_5MHZ)
|
|
rinfo->bw = RATE_INFO_BW_5;
|
|
else if (sta->rx_stats.last_rate_flag & RX_FLAG_10MHZ)
|
|
rinfo->bw = RATE_INFO_BW_10;
|
|
else if (sta->rx_stats.last_rate_flag & RX_FLAG_40MHZ)
|
|
rinfo->bw = RATE_INFO_BW_40;
|
|
else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_80MHZ)
|
|
rinfo->bw = RATE_INFO_BW_80;
|
|
else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_160MHZ)
|
|
rinfo->bw = RATE_INFO_BW_160;
|
|
else
|
|
rinfo->bw = RATE_INFO_BW_20;
|
|
}
|
|
|
|
void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct rate_control_ref *ref = NULL;
|
|
u32 thr = 0;
|
|
int i, ac;
|
|
|
|
if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
|
|
ref = local->rate_ctrl;
|
|
|
|
sinfo->generation = sdata->local->sta_generation;
|
|
|
|
/* do before driver, so beacon filtering drivers have a
|
|
* chance to e.g. just add the number of filtered beacons
|
|
* (or just modify the value entirely, of course)
|
|
*/
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION)
|
|
sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
|
|
|
|
drv_sta_statistics(local, sdata, &sta->sta, sinfo);
|
|
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
|
|
BIT(NL80211_STA_INFO_STA_FLAGS) |
|
|
BIT(NL80211_STA_INFO_BSS_PARAM) |
|
|
BIT(NL80211_STA_INFO_CONNECTED_TIME) |
|
|
BIT(NL80211_STA_INFO_RX_DROP_MISC);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
|
|
}
|
|
|
|
sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
|
|
sinfo->inactive_time =
|
|
jiffies_to_msecs(jiffies - sta->rx_stats.last_rx);
|
|
|
|
if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
|
|
BIT(NL80211_STA_INFO_TX_BYTES)))) {
|
|
sinfo->tx_bytes = 0;
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
|
|
sinfo->tx_bytes += sta->tx_stats.bytes[ac];
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
|
|
sinfo->tx_packets = 0;
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
|
|
sinfo->tx_packets += sta->tx_stats.packets[ac];
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
|
|
}
|
|
|
|
if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
|
|
BIT(NL80211_STA_INFO_RX_BYTES)))) {
|
|
sinfo->rx_bytes = sta->rx_stats.bytes;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
|
|
sinfo->rx_packets = sta->rx_stats.packets;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
|
|
sinfo->tx_retries = sta->status_stats.retry_count;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
|
|
sinfo->tx_failed = sta->status_stats.retry_failed;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
|
|
}
|
|
|
|
sinfo->rx_dropped_misc = sta->rx_stats.dropped;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
|
|
!(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
|
|
BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
|
|
sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
|
|
}
|
|
|
|
if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
|
|
ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
|
|
sinfo->signal = (s8)sta->rx_stats.last_signal;
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
|
|
sinfo->signal_avg =
|
|
-ewma_signal_read(&sta->rx_stats.avg_signal);
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
|
|
}
|
|
}
|
|
|
|
if (sta->rx_stats.chains &&
|
|
!(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
|
|
BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
|
|
BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
|
|
|
|
sinfo->chains = sta->rx_stats.chains;
|
|
for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
|
|
sinfo->chain_signal[i] =
|
|
sta->rx_stats.chain_signal_last[i];
|
|
sinfo->chain_signal_avg[i] =
|
|
-ewma_signal_read(&sta->rx_stats.chain_signal_avg[i]);
|
|
}
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
|
|
sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
|
|
&sinfo->txrate);
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
|
|
}
|
|
|
|
if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
|
|
sta_set_rate_info_rx(sta, &sinfo->rxrate);
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
|
|
}
|
|
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
|
|
for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
|
|
struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
|
|
|
|
if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
|
|
tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
|
|
tidstats->rx_msdu = sta->rx_stats.msdu[i];
|
|
}
|
|
|
|
if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
|
|
tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
|
|
tidstats->tx_msdu = sta->tx_stats.msdu[i];
|
|
}
|
|
|
|
if (!(tidstats->filled &
|
|
BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
|
|
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
|
|
tidstats->filled |=
|
|
BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
|
|
tidstats->tx_msdu_retries =
|
|
sta->status_stats.msdu_retries[i];
|
|
}
|
|
|
|
if (!(tidstats->filled &
|
|
BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
|
|
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
|
|
tidstats->filled |=
|
|
BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
|
|
tidstats->tx_msdu_failed =
|
|
sta->status_stats.msdu_failed[i];
|
|
}
|
|
}
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
|
|
BIT(NL80211_STA_INFO_PLID) |
|
|
BIT(NL80211_STA_INFO_PLINK_STATE) |
|
|
BIT(NL80211_STA_INFO_LOCAL_PM) |
|
|
BIT(NL80211_STA_INFO_PEER_PM) |
|
|
BIT(NL80211_STA_INFO_NONPEER_PM);
|
|
|
|
sinfo->llid = sta->mesh->llid;
|
|
sinfo->plid = sta->mesh->plid;
|
|
sinfo->plink_state = sta->mesh->plink_state;
|
|
if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
|
|
sinfo->t_offset = sta->mesh->t_offset;
|
|
}
|
|
sinfo->local_pm = sta->mesh->local_pm;
|
|
sinfo->peer_pm = sta->mesh->peer_pm;
|
|
sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
|
|
#endif
|
|
}
|
|
|
|
sinfo->bss_param.flags = 0;
|
|
if (sdata->vif.bss_conf.use_cts_prot)
|
|
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
|
|
if (sdata->vif.bss_conf.use_short_preamble)
|
|
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
|
|
if (sdata->vif.bss_conf.use_short_slot)
|
|
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
|
|
sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
|
|
sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
|
|
|
|
sinfo->sta_flags.set = 0;
|
|
sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
|
|
BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
|
|
BIT(NL80211_STA_FLAG_WME) |
|
|
BIT(NL80211_STA_FLAG_MFP) |
|
|
BIT(NL80211_STA_FLAG_AUTHENTICATED) |
|
|
BIT(NL80211_STA_FLAG_ASSOCIATED) |
|
|
BIT(NL80211_STA_FLAG_TDLS_PEER);
|
|
if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
|
|
if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
|
|
if (sta->sta.wme)
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
|
|
if (test_sta_flag(sta, WLAN_STA_MFP))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
|
|
if (test_sta_flag(sta, WLAN_STA_AUTH))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
|
|
if (test_sta_flag(sta, WLAN_STA_ASSOC))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
|
|
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
|
|
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
|
|
|
|
/* check if the driver has a SW RC implementation */
|
|
if (ref && ref->ops->get_expected_throughput)
|
|
thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
|
|
else
|
|
thr = drv_get_expected_throughput(local, &sta->sta);
|
|
|
|
if (thr != 0) {
|
|
sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
|
|
sinfo->expected_throughput = thr;
|
|
}
|
|
}
|