![Felix Fietkau](/assets/img/avatar_default.png)
Free tx status skbs when draining power save buffers, pending frames, or when tearing down a vif. Fixes remaining conditions that can lead to hostapd/wpa_supplicant hangs when running out of socket write memory. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: stable@vger.kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
1650 lines
42 KiB
C
1650 lines
42 KiB
C
/*
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* Interface handling (except master interface)
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*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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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/slab.h>
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#include <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include "ieee80211_i.h"
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#include "sta_info.h"
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#include "debugfs_netdev.h"
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#include "mesh.h"
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#include "led.h"
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#include "driver-ops.h"
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#include "wme.h"
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#include "rate.h"
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/**
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* DOC: Interface list locking
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*
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* The interface list in each struct ieee80211_local is protected
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* three-fold:
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*
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* (1) modifications may only be done under the RTNL
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* (2) modifications and readers are protected against each other by
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* the iflist_mtx.
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* (3) modifications are done in an RCU manner so atomic readers
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* can traverse the list in RCU-safe blocks.
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*
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* As a consequence, reads (traversals) of the list can be protected
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* by either the RTNL, the iflist_mtx or RCU.
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*/
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static u32 ieee80211_idle_off(struct ieee80211_local *local,
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const char *reason)
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{
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if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
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return 0;
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local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
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return IEEE80211_CONF_CHANGE_IDLE;
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}
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static u32 ieee80211_idle_on(struct ieee80211_local *local)
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{
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if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
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return 0;
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drv_flush(local, false);
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local->hw.conf.flags |= IEEE80211_CONF_IDLE;
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return IEEE80211_CONF_CHANGE_IDLE;
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}
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static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
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{
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struct ieee80211_sub_if_data *sdata;
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int count = 0;
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bool working = false, scanning = false;
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unsigned int led_trig_start = 0, led_trig_stop = 0;
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struct ieee80211_roc_work *roc;
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#ifdef CONFIG_PROVE_LOCKING
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WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
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!lockdep_is_held(&local->iflist_mtx));
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#endif
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lockdep_assert_held(&local->mtx);
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (!ieee80211_sdata_running(sdata)) {
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sdata->vif.bss_conf.idle = true;
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continue;
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}
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sdata->old_idle = sdata->vif.bss_conf.idle;
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/* do not count disabled managed interfaces */
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if (sdata->vif.type == NL80211_IFTYPE_STATION &&
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!sdata->u.mgd.associated &&
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!sdata->u.mgd.auth_data &&
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!sdata->u.mgd.assoc_data) {
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sdata->vif.bss_conf.idle = true;
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continue;
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}
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/* do not count unused IBSS interfaces */
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if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
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!sdata->u.ibss.ssid_len) {
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sdata->vif.bss_conf.idle = true;
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continue;
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}
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if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
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continue;
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/* count everything else */
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sdata->vif.bss_conf.idle = false;
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count++;
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}
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if (!local->ops->remain_on_channel) {
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list_for_each_entry(roc, &local->roc_list, list) {
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working = true;
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roc->sdata->vif.bss_conf.idle = false;
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}
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}
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sdata = rcu_dereference_protected(local->scan_sdata,
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lockdep_is_held(&local->mtx));
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if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
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scanning = true;
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sdata->vif.bss_conf.idle = false;
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}
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
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sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
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sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
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continue;
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if (sdata->old_idle == sdata->vif.bss_conf.idle)
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continue;
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if (!ieee80211_sdata_running(sdata))
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continue;
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ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
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}
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if (working || scanning)
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led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
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else
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led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
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if (count)
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led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
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else
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led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
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ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
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if (working)
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return ieee80211_idle_off(local, "working");
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if (scanning)
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return ieee80211_idle_off(local, "scanning");
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if (!count)
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return ieee80211_idle_on(local);
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else
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return ieee80211_idle_off(local, "in use");
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return 0;
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}
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void ieee80211_recalc_idle(struct ieee80211_local *local)
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{
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u32 chg;
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mutex_lock(&local->iflist_mtx);
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chg = __ieee80211_recalc_idle(local);
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mutex_unlock(&local->iflist_mtx);
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if (chg)
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ieee80211_hw_config(local, chg);
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}
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static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
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{
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int meshhdrlen;
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
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/* FIX: what would be proper limits for MTU?
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* This interface uses 802.3 frames. */
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if (new_mtu < 256 ||
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new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
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return -EINVAL;
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}
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dev->mtu = new_mtu;
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return 0;
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}
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static int ieee80211_change_mac(struct net_device *dev, void *addr)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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struct sockaddr *sa = addr;
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int ret;
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if (ieee80211_sdata_running(sdata))
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return -EBUSY;
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ret = eth_mac_addr(dev, sa);
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if (ret == 0)
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memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
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return ret;
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}
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static inline int identical_mac_addr_allowed(int type1, int type2)
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{
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return type1 == NL80211_IFTYPE_MONITOR ||
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type2 == NL80211_IFTYPE_MONITOR ||
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type1 == NL80211_IFTYPE_P2P_DEVICE ||
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type2 == NL80211_IFTYPE_P2P_DEVICE ||
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(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
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(type1 == NL80211_IFTYPE_WDS &&
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(type2 == NL80211_IFTYPE_WDS ||
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type2 == NL80211_IFTYPE_AP)) ||
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(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
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(type1 == NL80211_IFTYPE_AP_VLAN &&
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(type2 == NL80211_IFTYPE_AP ||
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type2 == NL80211_IFTYPE_AP_VLAN));
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}
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static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
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enum nl80211_iftype iftype)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_sub_if_data *nsdata;
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ASSERT_RTNL();
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(nsdata, &local->interfaces, list) {
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if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
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/*
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* Allow only a single IBSS interface to be up at any
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* time. This is restricted because beacon distribution
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* cannot work properly if both are in the same IBSS.
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*
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* To remove this restriction we'd have to disallow them
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* from setting the same SSID on different IBSS interfaces
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* belonging to the same hardware. Then, however, we're
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* faced with having to adopt two different TSF timers...
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*/
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if (iftype == NL80211_IFTYPE_ADHOC &&
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nsdata->vif.type == NL80211_IFTYPE_ADHOC)
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return -EBUSY;
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/*
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* The remaining checks are only performed for interfaces
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* with the same MAC address.
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*/
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if (!ether_addr_equal(sdata->vif.addr,
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nsdata->vif.addr))
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continue;
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/*
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* check whether it may have the same address
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*/
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if (!identical_mac_addr_allowed(iftype,
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nsdata->vif.type))
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return -ENOTUNIQ;
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/*
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* can only add VLANs to enabled APs
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*/
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if (iftype == NL80211_IFTYPE_AP_VLAN &&
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nsdata->vif.type == NL80211_IFTYPE_AP)
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sdata->bss = &nsdata->u.ap;
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}
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}
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return 0;
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}
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static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
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{
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int n_queues = sdata->local->hw.queues;
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int i;
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if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
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for (i = 0; i < IEEE80211_NUM_ACS; i++) {
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if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
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IEEE80211_INVAL_HW_QUEUE))
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return -EINVAL;
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if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
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n_queues))
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return -EINVAL;
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}
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}
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if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
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!(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
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sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
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return 0;
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}
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if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
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return -EINVAL;
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if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
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return -EINVAL;
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return 0;
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}
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void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
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const int offset)
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{
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struct ieee80211_local *local = sdata->local;
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u32 flags = sdata->u.mntr_flags;
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#define ADJUST(_f, _s) do { \
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if (flags & MONITOR_FLAG_##_f) \
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local->fif_##_s += offset; \
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} while (0)
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ADJUST(FCSFAIL, fcsfail);
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ADJUST(PLCPFAIL, plcpfail);
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ADJUST(CONTROL, control);
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ADJUST(CONTROL, pspoll);
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ADJUST(OTHER_BSS, other_bss);
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#undef ADJUST
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}
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static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_local *local = sdata->local;
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int i;
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for (i = 0; i < IEEE80211_NUM_ACS; i++) {
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if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
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sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
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else if (local->hw.queues >= IEEE80211_NUM_ACS)
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sdata->vif.hw_queue[i] = i;
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else
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sdata->vif.hw_queue[i] = 0;
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}
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sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
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}
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static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
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{
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struct ieee80211_sub_if_data *sdata;
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int ret = 0;
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if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
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return 0;
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mutex_lock(&local->iflist_mtx);
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if (local->monitor_sdata)
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goto out_unlock;
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sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
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if (!sdata) {
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ret = -ENOMEM;
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goto out_unlock;
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}
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/* set up data */
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sdata->local = local;
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sdata->vif.type = NL80211_IFTYPE_MONITOR;
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snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
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wiphy_name(local->hw.wiphy));
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ieee80211_set_default_queues(sdata);
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ret = drv_add_interface(local, sdata);
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if (WARN_ON(ret)) {
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/* ok .. stupid driver, it asked for this! */
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kfree(sdata);
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goto out_unlock;
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}
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ret = ieee80211_check_queues(sdata);
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if (ret) {
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kfree(sdata);
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goto out_unlock;
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}
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rcu_assign_pointer(local->monitor_sdata, sdata);
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out_unlock:
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mutex_unlock(&local->iflist_mtx);
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return ret;
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}
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static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
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{
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struct ieee80211_sub_if_data *sdata;
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if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
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return;
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mutex_lock(&local->iflist_mtx);
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sdata = rcu_dereference_protected(local->monitor_sdata,
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lockdep_is_held(&local->iflist_mtx));
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if (!sdata)
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goto out_unlock;
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rcu_assign_pointer(local->monitor_sdata, NULL);
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synchronize_net();
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drv_remove_interface(local, sdata);
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kfree(sdata);
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out_unlock:
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mutex_unlock(&local->iflist_mtx);
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}
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/*
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* NOTE: Be very careful when changing this function, it must NOT return
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* an error on interface type changes that have been pre-checked, so most
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* checks should be in ieee80211_check_concurrent_iface.
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*/
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int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
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struct net_device *dev = wdev->netdev;
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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u32 changed = 0;
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int res;
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u32 hw_reconf_flags = 0;
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|
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_WDS:
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if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
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return -ENOLINK;
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break;
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case NL80211_IFTYPE_AP_VLAN: {
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struct ieee80211_sub_if_data *master;
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if (!sdata->bss)
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return -ENOLINK;
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list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
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master = container_of(sdata->bss,
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struct ieee80211_sub_if_data, u.ap);
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sdata->control_port_protocol =
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master->control_port_protocol;
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sdata->control_port_no_encrypt =
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master->control_port_no_encrypt;
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break;
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}
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case NL80211_IFTYPE_AP:
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sdata->bss = &sdata->u.ap;
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break;
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case NL80211_IFTYPE_MESH_POINT:
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_MONITOR:
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_P2P_DEVICE:
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/* no special treatment */
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break;
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case NL80211_IFTYPE_UNSPECIFIED:
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case NUM_NL80211_IFTYPES:
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case NL80211_IFTYPE_P2P_CLIENT:
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case NL80211_IFTYPE_P2P_GO:
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/* cannot happen */
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WARN_ON(1);
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break;
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}
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if (local->open_count == 0) {
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res = drv_start(local);
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if (res)
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goto err_del_bss;
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if (local->ops->napi_poll)
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napi_enable(&local->napi);
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/* we're brought up, everything changes */
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hw_reconf_flags = ~0;
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ieee80211_led_radio(local, true);
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ieee80211_mod_tpt_led_trig(local,
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IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
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}
|
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|
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/*
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* Copy the hopefully now-present MAC address to
|
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* this interface, if it has the special null one.
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*/
|
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if (dev && is_zero_ether_addr(dev->dev_addr)) {
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memcpy(dev->dev_addr,
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local->hw.wiphy->perm_addr,
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ETH_ALEN);
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memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
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|
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if (!is_valid_ether_addr(dev->dev_addr)) {
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|
res = -EADDRNOTAVAIL;
|
|
goto err_stop;
|
|
}
|
|
}
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
/* no need to tell driver, but set carrier */
|
|
if (rtnl_dereference(sdata->bss->beacon))
|
|
netif_carrier_on(dev);
|
|
else
|
|
netif_carrier_off(dev);
|
|
break;
|
|
case NL80211_IFTYPE_MONITOR:
|
|
if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
|
|
local->cooked_mntrs++;
|
|
break;
|
|
}
|
|
|
|
if (local->monitors == 0 && local->open_count == 0) {
|
|
res = ieee80211_add_virtual_monitor(local);
|
|
if (res)
|
|
goto err_stop;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
ieee80211_adjust_monitor_flags(sdata, 1);
|
|
ieee80211_configure_filter(local);
|
|
|
|
netif_carrier_on(dev);
|
|
break;
|
|
default:
|
|
if (coming_up) {
|
|
ieee80211_del_virtual_monitor(local);
|
|
|
|
res = drv_add_interface(local, sdata);
|
|
if (res)
|
|
goto err_stop;
|
|
res = ieee80211_check_queues(sdata);
|
|
if (res)
|
|
goto err_del_interface;
|
|
}
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
local->fif_pspoll++;
|
|
local->fif_probe_req++;
|
|
|
|
ieee80211_configure_filter(local);
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
|
local->fif_probe_req++;
|
|
}
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
|
|
changed |= ieee80211_reset_erp_info(sdata);
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
netif_carrier_off(dev);
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
break;
|
|
default:
|
|
netif_carrier_on(dev);
|
|
}
|
|
|
|
/*
|
|
* set default queue parameters so drivers don't
|
|
* need to initialise the hardware if the hardware
|
|
* doesn't start up with sane defaults
|
|
*/
|
|
ieee80211_set_wmm_default(sdata, true);
|
|
}
|
|
|
|
set_bit(SDATA_STATE_RUNNING, &sdata->state);
|
|
|
|
if (sdata->vif.type == 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;
|
|
}
|
|
|
|
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);
|
|
|
|
res = sta_info_insert(sta);
|
|
if (res) {
|
|
/* STA has been freed */
|
|
goto err_del_interface;
|
|
}
|
|
|
|
rate_control_rate_init(sta);
|
|
netif_carrier_on(dev);
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
|
|
rcu_assign_pointer(local->p2p_sdata, sdata);
|
|
}
|
|
|
|
/*
|
|
* 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 (sdata->flags & IEEE80211_SDATA_PROMISC)
|
|
atomic_inc(&local->iff_promiscs);
|
|
|
|
mutex_lock(&local->mtx);
|
|
hw_reconf_flags |= __ieee80211_recalc_idle(local);
|
|
mutex_unlock(&local->mtx);
|
|
|
|
if (coming_up)
|
|
local->open_count++;
|
|
|
|
if (hw_reconf_flags)
|
|
ieee80211_hw_config(local, hw_reconf_flags);
|
|
|
|
ieee80211_recalc_ps(local, -1);
|
|
|
|
if (dev)
|
|
netif_tx_start_all_queues(dev);
|
|
|
|
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)
|
|
list_del(&sdata->u.vlan.list);
|
|
/* might already be clear but that doesn't matter */
|
|
clear_bit(SDATA_STATE_RUNNING, &sdata->state);
|
|
return res;
|
|
}
|
|
|
|
static int ieee80211_open(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
int err;
|
|
|
|
/* fail early if user set an invalid address */
|
|
if (!is_valid_ether_addr(dev->dev_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
|
|
if (err)
|
|
return err;
|
|
|
|
return ieee80211_do_open(&sdata->wdev, true);
|
|
}
|
|
|
|
static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
|
|
bool going_down)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
unsigned long flags;
|
|
struct sk_buff *skb, *tmp;
|
|
u32 hw_reconf_flags = 0;
|
|
int i;
|
|
enum nl80211_channel_type orig_ct;
|
|
|
|
clear_bit(SDATA_STATE_RUNNING, &sdata->state);
|
|
|
|
if (rcu_access_pointer(local->scan_sdata) == sdata)
|
|
ieee80211_scan_cancel(local);
|
|
|
|
/*
|
|
* Stop TX on this interface first.
|
|
*/
|
|
if (sdata->dev)
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
|
|
ieee80211_roc_purge(sdata);
|
|
|
|
/*
|
|
* 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!)
|
|
*
|
|
* This is relevant only in AP, WDS and mesh modes, since in
|
|
* all other modes we've already removed all stations when
|
|
* disconnecting etc.
|
|
*/
|
|
sta_info_flush(local, sdata);
|
|
|
|
/*
|
|
* Don't count this interface for promisc/allmulti while it
|
|
* is down. dev_mc_unsync() will invoke set_multicast_list
|
|
* on the master interface which will sync these down to the
|
|
* hardware as filter flags.
|
|
*/
|
|
if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
|
|
atomic_dec(&local->iff_allmultis);
|
|
|
|
if (sdata->flags & IEEE80211_SDATA_PROMISC)
|
|
atomic_dec(&local->iff_promiscs);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
local->fif_pspoll--;
|
|
local->fif_probe_req--;
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
|
local->fif_probe_req--;
|
|
}
|
|
|
|
if (sdata->dev) {
|
|
netif_addr_lock_bh(sdata->dev);
|
|
spin_lock_bh(&local->filter_lock);
|
|
__hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
|
|
sdata->dev->addr_len);
|
|
spin_unlock_bh(&local->filter_lock);
|
|
netif_addr_unlock_bh(sdata->dev);
|
|
|
|
ieee80211_configure_filter(local);
|
|
}
|
|
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
|
|
/* APs need special treatment */
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
struct ieee80211_sub_if_data *vlan, *tmpsdata;
|
|
struct beacon_data *old_beacon =
|
|
rtnl_dereference(sdata->u.ap.beacon);
|
|
struct probe_resp *old_probe_resp =
|
|
rtnl_dereference(sdata->u.ap.probe_resp);
|
|
|
|
/* sdata_running will return false, so this will disable */
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_BEACON_ENABLED);
|
|
|
|
/* remove beacon and probe response */
|
|
RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
|
|
RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
|
|
synchronize_rcu();
|
|
kfree(old_beacon);
|
|
kfree(old_probe_resp);
|
|
|
|
/* 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));
|
|
|
|
/* free all potentially still buffered bcast frames */
|
|
local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
|
|
skb_queue_purge(&sdata->u.ap.ps_bc_buf);
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
ieee80211_mgd_stop(sdata);
|
|
}
|
|
|
|
if (going_down)
|
|
local->open_count--;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
list_del(&sdata->u.vlan.list);
|
|
/* no need to tell driver */
|
|
break;
|
|
case NL80211_IFTYPE_MONITOR:
|
|
if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
|
|
local->cooked_mntrs--;
|
|
break;
|
|
}
|
|
|
|
local->monitors--;
|
|
if (local->monitors == 0) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
|
|
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
|
|
ieee80211_del_virtual_monitor(local);
|
|
}
|
|
|
|
ieee80211_adjust_monitor_flags(sdata, -1);
|
|
ieee80211_configure_filter(local);
|
|
break;
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
/* relies on synchronize_rcu() below */
|
|
rcu_assign_pointer(local->p2p_sdata, NULL);
|
|
/* fall through */
|
|
default:
|
|
flush_work(&sdata->work);
|
|
/*
|
|
* When we get here, the interface is marked down.
|
|
* Call rcu_barrier() to wait both for the RX path
|
|
* should it be using the interface and enqueuing
|
|
* frames at this very time on another CPU, and
|
|
* for the sta free call_rcu callbacks.
|
|
*/
|
|
rcu_barrier();
|
|
|
|
/*
|
|
* free_sta_rcu() enqueues a work for the actual
|
|
* sta cleanup, so we need to flush it while
|
|
* sdata is still valid.
|
|
*/
|
|
flush_workqueue(local->workqueue);
|
|
|
|
skb_queue_purge(&sdata->skb_queue);
|
|
|
|
/*
|
|
* Free all remaining keys, there shouldn't be any,
|
|
* except maybe group keys in AP more or WDS?
|
|
*/
|
|
ieee80211_free_keys(sdata);
|
|
|
|
if (going_down)
|
|
drv_remove_interface(local, sdata);
|
|
}
|
|
|
|
sdata->bss = NULL;
|
|
|
|
mutex_lock(&local->mtx);
|
|
hw_reconf_flags |= __ieee80211_recalc_idle(local);
|
|
mutex_unlock(&local->mtx);
|
|
|
|
ieee80211_recalc_ps(local, -1);
|
|
|
|
if (local->open_count == 0) {
|
|
if (local->ops->napi_poll)
|
|
napi_disable(&local->napi);
|
|
ieee80211_clear_tx_pending(local);
|
|
ieee80211_stop_device(local);
|
|
|
|
/* no reconfiguring after stop! */
|
|
hw_reconf_flags = 0;
|
|
}
|
|
|
|
/* Re-calculate channel-type, in case there are multiple vifs
|
|
* on different channel types.
|
|
*/
|
|
orig_ct = local->_oper_channel_type;
|
|
ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
|
|
|
|
/* do after stop to avoid reconfiguring when we stop anyway */
|
|
if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
|
|
ieee80211_hw_config(local, hw_reconf_flags);
|
|
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
|
|
for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
|
|
skb_queue_walk_safe(&local->pending[i], skb, tmp) {
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
if (info->control.vif == &sdata->vif) {
|
|
__skb_unlink(skb, &local->pending[i]);
|
|
ieee80211_free_txskb(&local->hw, skb);
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
|
|
if (local->monitors == local->open_count && local->monitors > 0)
|
|
ieee80211_add_virtual_monitor(local);
|
|
}
|
|
|
|
static int ieee80211_stop(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
|
|
ieee80211_do_stop(sdata, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ieee80211_set_multicast_list(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
int allmulti, promisc, sdata_allmulti, sdata_promisc;
|
|
|
|
allmulti = !!(dev->flags & IFF_ALLMULTI);
|
|
promisc = !!(dev->flags & IFF_PROMISC);
|
|
sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
|
|
sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
|
|
|
|
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;
|
|
}
|
|
|
|
if (promisc != sdata_promisc) {
|
|
if (dev->flags & IFF_PROMISC)
|
|
atomic_inc(&local->iff_promiscs);
|
|
else
|
|
atomic_dec(&local->iff_promiscs);
|
|
sdata->flags ^= IEEE80211_SDATA_PROMISC;
|
|
}
|
|
spin_lock_bh(&local->filter_lock);
|
|
__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
|
|
spin_unlock_bh(&local->filter_lock);
|
|
ieee80211_queue_work(&local->hw, &local->reconfig_filter);
|
|
}
|
|
|
|
/*
|
|
* Called when the netdev is removed or, by the code below, before
|
|
* the interface type changes.
|
|
*/
|
|
static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int flushed;
|
|
int i;
|
|
|
|
/* free extra data */
|
|
ieee80211_free_keys(sdata);
|
|
|
|
ieee80211_debugfs_remove_netdev(sdata);
|
|
|
|
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
|
|
__skb_queue_purge(&sdata->fragments[i].skb_list);
|
|
sdata->fragment_next = 0;
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
mesh_rmc_free(sdata);
|
|
|
|
flushed = sta_info_flush(local, sdata);
|
|
WARN_ON(flushed);
|
|
}
|
|
|
|
static void ieee80211_uninit(struct net_device *dev)
|
|
{
|
|
ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
|
|
}
|
|
|
|
static u16 ieee80211_netdev_select_queue(struct net_device *dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
|
|
}
|
|
|
|
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_change_mtu = ieee80211_change_mtu,
|
|
.ndo_set_mac_address = ieee80211_change_mac,
|
|
.ndo_select_queue = ieee80211_netdev_select_queue,
|
|
};
|
|
|
|
static u16 ieee80211_monitor_select_queue(struct net_device *dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_hdr *hdr;
|
|
struct ieee80211_radiotap_header *rtap = (void *)skb->data;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS)
|
|
return 0;
|
|
|
|
if (skb->len < 4 ||
|
|
skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
|
|
return 0; /* doesn't matter, frame will be dropped */
|
|
|
|
hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
|
|
|
|
return ieee80211_select_queue_80211(sdata, skb, hdr);
|
|
}
|
|
|
|
static const struct net_device_ops ieee80211_monitorif_ops = {
|
|
.ndo_open = ieee80211_open,
|
|
.ndo_stop = ieee80211_stop,
|
|
.ndo_uninit = ieee80211_uninit,
|
|
.ndo_start_xmit = ieee80211_monitor_start_xmit,
|
|
.ndo_set_rx_mode = ieee80211_set_multicast_list,
|
|
.ndo_change_mtu = ieee80211_change_mtu,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
.ndo_select_queue = ieee80211_monitor_select_queue,
|
|
};
|
|
|
|
static void ieee80211_if_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
|
|
dev->netdev_ops = &ieee80211_dataif_ops;
|
|
dev->destructor = free_netdev;
|
|
}
|
|
|
|
static void ieee80211_iface_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data, work);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
struct sta_info *sta;
|
|
struct ieee80211_ra_tid *ra_tid;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
return;
|
|
|
|
if (local->scanning)
|
|
return;
|
|
|
|
/*
|
|
* ieee80211_queue_work() should have picked up most cases,
|
|
* here we'll pick the rest.
|
|
*/
|
|
if (WARN(local->suspended,
|
|
"interface work scheduled while going to suspend\n"))
|
|
return;
|
|
|
|
/* first process frames */
|
|
while ((skb = skb_dequeue(&sdata->skb_queue))) {
|
|
struct ieee80211_mgmt *mgmt = (void *)skb->data;
|
|
|
|
if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
|
|
ra_tid = (void *)&skb->cb;
|
|
ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
|
|
ra_tid->tid);
|
|
} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
|
|
ra_tid = (void *)&skb->cb;
|
|
ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
|
|
ra_tid->tid);
|
|
} else if (ieee80211_is_action(mgmt->frame_control) &&
|
|
mgmt->u.action.category == WLAN_CATEGORY_BACK) {
|
|
int len = skb->len;
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get_bss(sdata, mgmt->sa);
|
|
if (sta) {
|
|
switch (mgmt->u.action.u.addba_req.action_code) {
|
|
case WLAN_ACTION_ADDBA_REQ:
|
|
ieee80211_process_addba_request(
|
|
local, sta, mgmt, len);
|
|
break;
|
|
case WLAN_ACTION_ADDBA_RESP:
|
|
ieee80211_process_addba_resp(local, sta,
|
|
mgmt, len);
|
|
break;
|
|
case WLAN_ACTION_DELBA:
|
|
ieee80211_process_delba(sdata, sta,
|
|
mgmt, len);
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
|
|
struct ieee80211_hdr *hdr = (void *)mgmt;
|
|
/*
|
|
* So the frame isn't mgmt, but frame_control
|
|
* is at the right place anyway, of course, so
|
|
* the if statement is correct.
|
|
*
|
|
* Warn if we have other data frame types here,
|
|
* they must not get here.
|
|
*/
|
|
WARN_ON(hdr->frame_control &
|
|
cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
|
|
WARN_ON(!(hdr->seq_ctrl &
|
|
cpu_to_le16(IEEE80211_SCTL_FRAG)));
|
|
/*
|
|
* This was a fragment of a frame, received while
|
|
* a block-ack session was active. That cannot be
|
|
* right, so terminate the session.
|
|
*/
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get_bss(sdata, mgmt->sa);
|
|
if (sta) {
|
|
u16 tid = *ieee80211_get_qos_ctl(hdr) &
|
|
IEEE80211_QOS_CTL_TID_MASK;
|
|
|
|
__ieee80211_stop_rx_ba_session(
|
|
sta, tid, WLAN_BACK_RECIPIENT,
|
|
WLAN_REASON_QSTA_REQUIRE_SETUP,
|
|
true);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
} else switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_sta_rx_queued_mgmt(sdata, skb);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_ibss_rx_queued_mgmt(sdata, skb);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (!ieee80211_vif_is_mesh(&sdata->vif))
|
|
break;
|
|
ieee80211_mesh_rx_queued_mgmt(sdata, skb);
|
|
break;
|
|
default:
|
|
WARN(1, "frame for unexpected interface type");
|
|
break;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/* then other type-dependent work */
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_sta_work(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_ibss_work(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (!ieee80211_vif_is_mesh(&sdata->vif))
|
|
break;
|
|
ieee80211_mesh_work(sdata);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Helper function to initialise an interface to a specific type.
|
|
*/
|
|
static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
|
|
enum nl80211_iftype type)
|
|
{
|
|
/* clear type-dependent union */
|
|
memset(&sdata->u, 0, sizeof(sdata->u));
|
|
|
|
/* and set some type-dependent values */
|
|
sdata->vif.type = type;
|
|
sdata->vif.p2p = false;
|
|
sdata->wdev.iftype = type;
|
|
|
|
sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
|
|
sdata->control_port_no_encrypt = false;
|
|
|
|
sdata->noack_map = 0;
|
|
|
|
/* only monitor/p2p-device differ */
|
|
if (sdata->dev) {
|
|
sdata->dev->netdev_ops = &ieee80211_dataif_ops;
|
|
sdata->dev->type = ARPHRD_ETHER;
|
|
}
|
|
|
|
skb_queue_head_init(&sdata->skb_queue);
|
|
INIT_WORK(&sdata->work, ieee80211_iface_work);
|
|
|
|
switch (type) {
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
type = NL80211_IFTYPE_AP;
|
|
sdata->vif.type = type;
|
|
sdata->vif.p2p = true;
|
|
/* fall through */
|
|
case NL80211_IFTYPE_AP:
|
|
skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
|
|
INIT_LIST_HEAD(&sdata->u.ap.vlans);
|
|
break;
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
type = NL80211_IFTYPE_STATION;
|
|
sdata->vif.type = type;
|
|
sdata->vif.p2p = true;
|
|
/* fall through */
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_sta_setup_sdata(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_ibss_setup_sdata(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
ieee80211_mesh_init_sdata(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MONITOR:
|
|
sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
|
|
sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
|
|
sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
|
|
MONITOR_FLAG_OTHER_BSS;
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
break;
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case NUM_NL80211_IFTYPES:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
ieee80211_debugfs_add_netdev(sdata);
|
|
}
|
|
|
|
static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
|
|
enum nl80211_iftype type)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int ret, err;
|
|
enum nl80211_iftype internal_type = type;
|
|
bool p2p = false;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (!local->ops->change_interface)
|
|
return -EBUSY;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
/*
|
|
* Could maybe also all others here?
|
|
* Just not sure how that interacts
|
|
* with the RX/config path e.g. for
|
|
* mesh.
|
|
*/
|
|
break;
|
|
default:
|
|
return -EBUSY;
|
|
}
|
|
|
|
switch (type) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
/*
|
|
* Could probably support everything
|
|
* but WDS here (WDS do_open can fail
|
|
* under memory pressure, which this
|
|
* code isn't prepared to handle).
|
|
*/
|
|
break;
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
p2p = true;
|
|
internal_type = NL80211_IFTYPE_STATION;
|
|
break;
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
p2p = true;
|
|
internal_type = NL80211_IFTYPE_AP;
|
|
break;
|
|
default:
|
|
return -EBUSY;
|
|
}
|
|
|
|
ret = ieee80211_check_concurrent_iface(sdata, internal_type);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ieee80211_do_stop(sdata, false);
|
|
|
|
ieee80211_teardown_sdata(sdata);
|
|
|
|
ret = drv_change_interface(local, sdata, internal_type, p2p);
|
|
if (ret)
|
|
type = sdata->vif.type;
|
|
|
|
/*
|
|
* Ignore return value here, there's not much we can do since
|
|
* the driver changed the interface type internally already.
|
|
* The warnings will hopefully make driver authors fix it :-)
|
|
*/
|
|
ieee80211_check_queues(sdata);
|
|
|
|
ieee80211_setup_sdata(sdata, type);
|
|
|
|
err = ieee80211_do_open(&sdata->wdev, false);
|
|
WARN(err, "type change: do_open returned %d", err);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
|
|
enum nl80211_iftype type)
|
|
{
|
|
int ret;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (type == ieee80211_vif_type_p2p(&sdata->vif))
|
|
return 0;
|
|
|
|
/* Setting ad-hoc mode on non-IBSS channel is not supported. */
|
|
if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
|
|
type == NL80211_IFTYPE_ADHOC)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (ieee80211_sdata_running(sdata)) {
|
|
ret = ieee80211_runtime_change_iftype(sdata, type);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
/* Purge and reset type-dependent state. */
|
|
ieee80211_teardown_sdata(sdata);
|
|
ieee80211_setup_sdata(sdata, type);
|
|
}
|
|
|
|
/* reset some values that shouldn't be kept across type changes */
|
|
sdata->vif.bss_conf.basic_rates =
|
|
ieee80211_mandatory_rates(sdata->local,
|
|
sdata->local->oper_channel->band);
|
|
sdata->drop_unencrypted = 0;
|
|
if (type == NL80211_IFTYPE_STATION)
|
|
sdata->u.mgd.use_4addr = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
|
|
u8 *perm_addr, enum nl80211_iftype type)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
u64 mask, start, addr, val, inc;
|
|
u8 *m;
|
|
u8 tmp_addr[ETH_ALEN];
|
|
int i;
|
|
|
|
/* default ... something at least */
|
|
memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
|
|
|
|
if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
|
|
local->hw.wiphy->n_addresses <= 1)
|
|
return;
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
|
|
switch (type) {
|
|
case NL80211_IFTYPE_MONITOR:
|
|
/* doesn't matter */
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
/* match up with an AP interface */
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type != NL80211_IFTYPE_AP)
|
|
continue;
|
|
memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
|
|
break;
|
|
}
|
|
/* keep default if no AP interface present */
|
|
break;
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
|
|
continue;
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
/* otherwise fall through */
|
|
default:
|
|
/* assign a new address if possible -- try n_addresses first */
|
|
for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
|
|
bool used = false;
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (memcmp(local->hw.wiphy->addresses[i].addr,
|
|
sdata->vif.addr, ETH_ALEN) == 0) {
|
|
used = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!used) {
|
|
memcpy(perm_addr,
|
|
local->hw.wiphy->addresses[i].addr,
|
|
ETH_ALEN);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* try mask if available */
|
|
if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
|
|
break;
|
|
|
|
m = local->hw.wiphy->addr_mask;
|
|
mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
|
|
((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
|
|
((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
|
|
|
|
if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
|
|
/* not a contiguous mask ... not handled now! */
|
|
pr_info("not contiguous\n");
|
|
break;
|
|
}
|
|
|
|
m = local->hw.wiphy->perm_addr;
|
|
start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
|
|
((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
|
|
((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
|
|
|
|
inc = 1ULL<<__ffs64(mask);
|
|
val = (start & mask);
|
|
addr = (start & ~mask) | (val & mask);
|
|
do {
|
|
bool used = false;
|
|
|
|
tmp_addr[5] = addr >> 0*8;
|
|
tmp_addr[4] = addr >> 1*8;
|
|
tmp_addr[3] = addr >> 2*8;
|
|
tmp_addr[2] = addr >> 3*8;
|
|
tmp_addr[1] = addr >> 4*8;
|
|
tmp_addr[0] = addr >> 5*8;
|
|
|
|
val += inc;
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (memcmp(tmp_addr, sdata->vif.addr,
|
|
ETH_ALEN) == 0) {
|
|
used = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!used) {
|
|
memcpy(perm_addr, tmp_addr, ETH_ALEN);
|
|
break;
|
|
}
|
|
addr = (start & ~mask) | (val & mask);
|
|
} while (addr != start);
|
|
|
|
break;
|
|
}
|
|
|
|
out_unlock:
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
|
|
struct wireless_dev **new_wdev, enum nl80211_iftype type,
|
|
struct vif_params *params)
|
|
{
|
|
struct net_device *ndev = NULL;
|
|
struct ieee80211_sub_if_data *sdata = NULL;
|
|
int ret, i;
|
|
int txqs = 1;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (type == NL80211_IFTYPE_P2P_DEVICE) {
|
|
struct wireless_dev *wdev;
|
|
|
|
sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
|
|
GFP_KERNEL);
|
|
if (!sdata)
|
|
return -ENOMEM;
|
|
wdev = &sdata->wdev;
|
|
|
|
sdata->dev = NULL;
|
|
strlcpy(sdata->name, name, IFNAMSIZ);
|
|
ieee80211_assign_perm_addr(local, wdev->address, type);
|
|
memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
|
|
} else {
|
|
if (local->hw.queues >= IEEE80211_NUM_ACS)
|
|
txqs = IEEE80211_NUM_ACS;
|
|
|
|
ndev = alloc_netdev_mqs(sizeof(*sdata) +
|
|
local->hw.vif_data_size,
|
|
name, ieee80211_if_setup, txqs, 1);
|
|
if (!ndev)
|
|
return -ENOMEM;
|
|
dev_net_set(ndev, wiphy_net(local->hw.wiphy));
|
|
|
|
ndev->needed_headroom = local->tx_headroom +
|
|
4*6 /* four MAC addresses */
|
|
+ 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
|
|
+ 6 /* mesh */
|
|
+ 8 /* rfc1042/bridge tunnel */
|
|
- ETH_HLEN /* ethernet hard_header_len */
|
|
+ IEEE80211_ENCRYPT_HEADROOM;
|
|
ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
|
|
|
|
ret = dev_alloc_name(ndev, ndev->name);
|
|
if (ret < 0) {
|
|
free_netdev(ndev);
|
|
return ret;
|
|
}
|
|
|
|
ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
|
|
memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
|
|
SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
|
|
|
|
/* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
|
|
sdata = netdev_priv(ndev);
|
|
ndev->ieee80211_ptr = &sdata->wdev;
|
|
memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
|
|
memcpy(sdata->name, ndev->name, IFNAMSIZ);
|
|
|
|
sdata->dev = ndev;
|
|
}
|
|
|
|
/* initialise type-independent data */
|
|
sdata->wdev.wiphy = local->hw.wiphy;
|
|
sdata->local = local;
|
|
#ifdef CONFIG_INET
|
|
sdata->arp_filter_state = true;
|
|
#endif
|
|
|
|
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
|
|
skb_queue_head_init(&sdata->fragments[i].skb_list);
|
|
|
|
INIT_LIST_HEAD(&sdata->key_list);
|
|
|
|
for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
|
|
struct ieee80211_supported_band *sband;
|
|
sband = local->hw.wiphy->bands[i];
|
|
sdata->rc_rateidx_mask[i] =
|
|
sband ? (1 << sband->n_bitrates) - 1 : 0;
|
|
if (sband)
|
|
memcpy(sdata->rc_rateidx_mcs_mask[i],
|
|
sband->ht_cap.mcs.rx_mask,
|
|
sizeof(sdata->rc_rateidx_mcs_mask[i]));
|
|
else
|
|
memset(sdata->rc_rateidx_mcs_mask[i], 0,
|
|
sizeof(sdata->rc_rateidx_mcs_mask[i]));
|
|
}
|
|
|
|
ieee80211_set_default_queues(sdata);
|
|
|
|
/* setup type-dependent data */
|
|
ieee80211_setup_sdata(sdata, type);
|
|
|
|
if (ndev) {
|
|
if (params) {
|
|
ndev->ieee80211_ptr->use_4addr = params->use_4addr;
|
|
if (type == NL80211_IFTYPE_STATION)
|
|
sdata->u.mgd.use_4addr = params->use_4addr;
|
|
}
|
|
|
|
ndev->features |= local->hw.netdev_features;
|
|
|
|
ret = register_netdevice(ndev);
|
|
if (ret) {
|
|
free_netdev(ndev);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_add_tail_rcu(&sdata->list, &local->interfaces);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
if (new_wdev)
|
|
*new_wdev = &sdata->wdev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&sdata->local->iflist_mtx);
|
|
list_del_rcu(&sdata->list);
|
|
mutex_unlock(&sdata->local->iflist_mtx);
|
|
|
|
synchronize_rcu();
|
|
|
|
if (sdata->dev) {
|
|
unregister_netdevice(sdata->dev);
|
|
} else {
|
|
cfg80211_unregister_wdev(&sdata->wdev);
|
|
kfree(sdata);
|
|
}
|
|
}
|
|
|
|
void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
|
|
return;
|
|
ieee80211_do_stop(sdata, true);
|
|
ieee80211_teardown_sdata(sdata);
|
|
}
|
|
|
|
/*
|
|
* Remove all interfaces, may only be called at hardware unregistration
|
|
* time because it doesn't do RCU-safe list removals.
|
|
*/
|
|
void ieee80211_remove_interfaces(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata, *tmp;
|
|
LIST_HEAD(unreg_list);
|
|
LIST_HEAD(wdev_list);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
|
|
list_del(&sdata->list);
|
|
|
|
if (sdata->dev)
|
|
unregister_netdevice_queue(sdata->dev, &unreg_list);
|
|
else
|
|
list_add(&sdata->list, &wdev_list);
|
|
}
|
|
mutex_unlock(&local->iflist_mtx);
|
|
unregister_netdevice_many(&unreg_list);
|
|
list_del(&unreg_list);
|
|
|
|
list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
|
|
list_del(&sdata->list);
|
|
cfg80211_unregister_wdev(&sdata->wdev);
|
|
kfree(sdata);
|
|
}
|
|
}
|
|
|
|
static int netdev_notify(struct notifier_block *nb,
|
|
unsigned long state,
|
|
void *ndev)
|
|
{
|
|
struct net_device *dev = ndev;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
if (state != NETDEV_CHANGENAME)
|
|
return 0;
|
|
|
|
if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
|
|
return 0;
|
|
|
|
if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
|
|
return 0;
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
|
|
memcpy(sdata->name, dev->name, IFNAMSIZ);
|
|
|
|
ieee80211_debugfs_rename_netdev(sdata);
|
|
return 0;
|
|
}
|
|
|
|
static struct notifier_block mac80211_netdev_notifier = {
|
|
.notifier_call = netdev_notify,
|
|
};
|
|
|
|
int ieee80211_iface_init(void)
|
|
{
|
|
return register_netdevice_notifier(&mac80211_netdev_notifier);
|
|
}
|
|
|
|
void ieee80211_iface_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&mac80211_netdev_notifier);
|
|
}
|