forked from Minki/linux
95dac04004
This patch fixes mac80211 to not rely on the rate control algorithm to update sta->tx_retry_failed and sta->tx_retry_count (even if we don't currently use them), removes a number of completely unused values we don't even show in debugfs and changes the code in ieee80211_tx_status() to not look up the sta_info repeatedly. The only behaviour change here would be not calling the rate control function rate_control_tx_status() when no sta_info is found, but all rate control algorithms ignore such calls anyway. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1046 lines
28 KiB
C
1046 lines
28 KiB
C
/*
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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 2006-2007 Jiri Benc <jbenc@suse.cz>
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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 <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <linux/module.h>
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#include <linux/init.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/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitmap.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "rate.h"
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#include "mesh.h"
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#include "wep.h"
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#include "wme.h"
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#include "aes_ccm.h"
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#include "led.h"
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#include "cfg.h"
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#include "debugfs.h"
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#include "debugfs_netdev.h"
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/*
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* For seeing transmitted packets on monitor interfaces
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* we have a radiotap header too.
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*/
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struct ieee80211_tx_status_rtap_hdr {
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struct ieee80211_radiotap_header hdr;
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__le16 tx_flags;
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u8 data_retries;
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} __attribute__ ((packed));
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/* must be called under mdev tx lock */
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void ieee80211_configure_filter(struct ieee80211_local *local)
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{
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unsigned int changed_flags;
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unsigned int new_flags = 0;
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if (atomic_read(&local->iff_promiscs))
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new_flags |= FIF_PROMISC_IN_BSS;
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if (atomic_read(&local->iff_allmultis))
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new_flags |= FIF_ALLMULTI;
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if (local->monitors)
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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if (local->fif_fcsfail)
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new_flags |= FIF_FCSFAIL;
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if (local->fif_plcpfail)
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new_flags |= FIF_PLCPFAIL;
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if (local->fif_control)
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new_flags |= FIF_CONTROL;
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if (local->fif_other_bss)
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new_flags |= FIF_OTHER_BSS;
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changed_flags = local->filter_flags ^ new_flags;
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/* be a bit nasty */
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new_flags |= (1<<31);
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local->ops->configure_filter(local_to_hw(local),
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changed_flags, &new_flags,
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local->mdev->mc_count,
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local->mdev->mc_list);
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WARN_ON(new_flags & (1<<31));
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local->filter_flags = new_flags & ~(1<<31);
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}
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/* master interface */
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static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
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{
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memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
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return ETH_ALEN;
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}
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static const struct header_ops ieee80211_header_ops = {
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.create = eth_header,
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.parse = header_parse_80211,
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.rebuild = eth_rebuild_header,
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.cache = eth_header_cache,
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.cache_update = eth_header_cache_update,
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};
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static int ieee80211_master_open(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_sub_if_data *sdata;
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int res = -EOPNOTSUPP;
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (netif_running(sdata->dev)) {
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res = 0;
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break;
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}
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}
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if (res)
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return res;
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netif_tx_start_all_queues(local->mdev);
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return 0;
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}
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static int ieee80211_master_stop(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_sub_if_data *sdata;
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(sdata, &local->interfaces, list)
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if (netif_running(sdata->dev))
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dev_close(sdata->dev);
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return 0;
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}
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static void ieee80211_master_set_multicast_list(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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ieee80211_configure_filter(local);
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}
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/* everything else */
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int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_conf conf;
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if (WARN_ON(!netif_running(sdata->dev)))
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return 0;
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if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
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return -EINVAL;
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if (!local->ops->config_interface)
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return 0;
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memset(&conf, 0, sizeof(conf));
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conf.changed = changed;
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if (sdata->vif.type == NL80211_IFTYPE_STATION ||
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sdata->vif.type == NL80211_IFTYPE_ADHOC) {
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conf.bssid = sdata->u.sta.bssid;
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conf.ssid = sdata->u.sta.ssid;
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conf.ssid_len = sdata->u.sta.ssid_len;
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} else if (sdata->vif.type == NL80211_IFTYPE_AP) {
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conf.bssid = sdata->dev->dev_addr;
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conf.ssid = sdata->u.ap.ssid;
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conf.ssid_len = sdata->u.ap.ssid_len;
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} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
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u8 zero[ETH_ALEN] = { 0 };
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conf.bssid = zero;
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conf.ssid = zero;
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conf.ssid_len = 0;
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} else {
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WARN_ON(1);
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return -EINVAL;
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}
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if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
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return -EINVAL;
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if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
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return -EINVAL;
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return local->ops->config_interface(local_to_hw(local),
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&sdata->vif, &conf);
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}
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int ieee80211_hw_config(struct ieee80211_local *local)
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{
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struct ieee80211_channel *chan;
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int ret = 0;
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if (local->sw_scanning)
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chan = local->scan_channel;
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else
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chan = local->oper_channel;
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local->hw.conf.channel = chan;
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if (!local->hw.conf.power_level)
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local->hw.conf.power_level = chan->max_power;
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else
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local->hw.conf.power_level = min(chan->max_power,
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local->hw.conf.power_level);
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local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
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#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
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printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
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wiphy_name(local->hw.wiphy), chan->center_freq);
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#endif
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if (local->open_count)
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ret = local->ops->config(local_to_hw(local), &local->hw.conf);
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return ret;
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}
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/**
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* ieee80211_handle_ht should be used only after legacy configuration
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* has been determined namely band, as ht configuration depends upon
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* the hardware's HT abilities for a _specific_ band.
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*/
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u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
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struct ieee80211_ht_info *req_ht_cap,
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struct ieee80211_ht_bss_info *req_bss_cap)
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{
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struct ieee80211_conf *conf = &local->hw.conf;
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struct ieee80211_supported_band *sband;
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struct ieee80211_ht_info ht_conf;
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struct ieee80211_ht_bss_info ht_bss_conf;
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u32 changed = 0;
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int i;
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u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
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u8 tx_mcs_set_cap;
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sband = local->hw.wiphy->bands[conf->channel->band];
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memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
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memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
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/* HT is not supported */
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if (!sband->ht_info.ht_supported) {
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conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
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goto out;
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}
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/* disable HT */
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if (!enable_ht) {
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if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
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changed |= BSS_CHANGED_HT;
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conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
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conf->ht_conf.ht_supported = 0;
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goto out;
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}
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if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
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changed |= BSS_CHANGED_HT;
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conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
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ht_conf.ht_supported = 1;
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ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
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ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS);
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ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS;
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ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
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ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
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ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
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ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
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ht_conf.ampdu_density = req_ht_cap->ampdu_density;
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/* Bits 96-100 */
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tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
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/* configure suppoerted Tx MCS according to requested MCS
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* (based in most cases on Rx capabilities of peer) and self
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* Tx MCS capabilities (as defined by low level driver HW
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* Tx capabilities) */
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if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
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goto check_changed;
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/* Counting from 0 therfore + 1 */
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if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
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max_tx_streams = ((tx_mcs_set_cap &
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IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
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for (i = 0; i < max_tx_streams; i++)
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ht_conf.supp_mcs_set[i] =
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sband->ht_info.supp_mcs_set[i] &
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req_ht_cap->supp_mcs_set[i];
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if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
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for (i = IEEE80211_SUPP_MCS_SET_UEQM;
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i < IEEE80211_SUPP_MCS_SET_LEN; i++)
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ht_conf.supp_mcs_set[i] =
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sband->ht_info.supp_mcs_set[i] &
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req_ht_cap->supp_mcs_set[i];
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check_changed:
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/* if bss configuration changed store the new one */
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if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
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memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
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changed |= BSS_CHANGED_HT;
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memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
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memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
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}
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out:
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return changed;
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}
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
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u32 changed)
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{
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struct ieee80211_local *local = sdata->local;
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if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
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return;
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if (!changed)
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return;
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if (local->ops->bss_info_changed)
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local->ops->bss_info_changed(local_to_hw(local),
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&sdata->vif,
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&sdata->bss_conf,
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changed);
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}
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u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
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{
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sdata->bss_conf.use_cts_prot = 0;
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sdata->bss_conf.use_short_preamble = 0;
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return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
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}
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void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
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struct sk_buff *skb)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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int tmp;
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skb->dev = local->mdev;
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skb->pkt_type = IEEE80211_TX_STATUS_MSG;
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skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
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&local->skb_queue : &local->skb_queue_unreliable, skb);
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tmp = skb_queue_len(&local->skb_queue) +
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skb_queue_len(&local->skb_queue_unreliable);
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while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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dev_kfree_skb_irq(skb);
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tmp--;
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I802_DEBUG_INC(local->tx_status_drop);
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}
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tasklet_schedule(&local->tasklet);
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}
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EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
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static void ieee80211_tasklet_handler(unsigned long data)
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{
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struct ieee80211_local *local = (struct ieee80211_local *) data;
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struct sk_buff *skb;
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struct ieee80211_rx_status rx_status;
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struct ieee80211_ra_tid *ra_tid;
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while ((skb = skb_dequeue(&local->skb_queue)) ||
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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switch (skb->pkt_type) {
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case IEEE80211_RX_MSG:
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/* status is in skb->cb */
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memcpy(&rx_status, skb->cb, sizeof(rx_status));
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/* Clear skb->pkt_type in order to not confuse kernel
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* netstack. */
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skb->pkt_type = 0;
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__ieee80211_rx(local_to_hw(local), skb, &rx_status);
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break;
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case IEEE80211_TX_STATUS_MSG:
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skb->pkt_type = 0;
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ieee80211_tx_status(local_to_hw(local), skb);
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break;
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case IEEE80211_DELBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_stop_tx_ba_cb(local_to_hw(local),
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ra_tid->ra, ra_tid->tid);
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dev_kfree_skb(skb);
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break;
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case IEEE80211_ADDBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_start_tx_ba_cb(local_to_hw(local),
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ra_tid->ra, ra_tid->tid);
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dev_kfree_skb(skb);
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break ;
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default:
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WARN_ON(1);
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dev_kfree_skb(skb);
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break;
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}
|
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}
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}
|
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|
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/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
|
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* make a prepared TX frame (one that has been given to hw) to look like brand
|
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* new IEEE 802.11 frame that is ready to go through TX processing again.
|
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*/
|
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static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
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struct ieee80211_key *key,
|
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struct sk_buff *skb)
|
|
{
|
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unsigned int hdrlen, iv_len, mic_len;
|
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
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|
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hdrlen = ieee80211_hdrlen(hdr->frame_control);
|
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|
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if (!key)
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goto no_key;
|
|
|
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switch (key->conf.alg) {
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case ALG_WEP:
|
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iv_len = WEP_IV_LEN;
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mic_len = WEP_ICV_LEN;
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break;
|
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case ALG_TKIP:
|
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iv_len = TKIP_IV_LEN;
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mic_len = TKIP_ICV_LEN;
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break;
|
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case ALG_CCMP:
|
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iv_len = CCMP_HDR_LEN;
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mic_len = CCMP_MIC_LEN;
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break;
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default:
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goto no_key;
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}
|
|
|
|
if (skb->len >= hdrlen + mic_len &&
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!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
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skb_trim(skb, skb->len - mic_len);
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if (skb->len >= hdrlen + iv_len) {
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memmove(skb->data + iv_len, skb->data, hdrlen);
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hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
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}
|
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|
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no_key:
|
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if (ieee80211_is_data_qos(hdr->frame_control)) {
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hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
|
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memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
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hdrlen - IEEE80211_QOS_CTL_LEN);
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skb_pull(skb, IEEE80211_QOS_CTL_LEN);
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}
|
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}
|
|
|
|
static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
|
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struct sta_info *sta,
|
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struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
|
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sta->tx_filtered_count++;
|
|
|
|
/*
|
|
* Clear the TX filter mask for this STA when sending the next
|
|
* packet. If the STA went to power save mode, this will happen
|
|
* when it wakes up for the next time.
|
|
*/
|
|
set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
|
|
|
|
/*
|
|
* This code races in the following way:
|
|
*
|
|
* (1) STA sends frame indicating it will go to sleep and does so
|
|
* (2) hardware/firmware adds STA to filter list, passes frame up
|
|
* (3) hardware/firmware processes TX fifo and suppresses a frame
|
|
* (4) we get TX status before having processed the frame and
|
|
* knowing that the STA has gone to sleep.
|
|
*
|
|
* This is actually quite unlikely even when both those events are
|
|
* processed from interrupts coming in quickly after one another or
|
|
* even at the same time because we queue both TX status events and
|
|
* RX frames to be processed by a tasklet and process them in the
|
|
* same order that they were received or TX status last. Hence, there
|
|
* is no race as long as the frame RX is processed before the next TX
|
|
* status, which drivers can ensure, see below.
|
|
*
|
|
* Note that this can only happen if the hardware or firmware can
|
|
* actually add STAs to the filter list, if this is done by the
|
|
* driver in response to set_tim() (which will only reduce the race
|
|
* this whole filtering tries to solve, not completely solve it)
|
|
* this situation cannot happen.
|
|
*
|
|
* To completely solve this race drivers need to make sure that they
|
|
* (a) don't mix the irq-safe/not irq-safe TX status/RX processing
|
|
* functions and
|
|
* (b) always process RX events before TX status events if ordering
|
|
* can be unknown, for example with different interrupt status
|
|
* bits.
|
|
*/
|
|
if (test_sta_flags(sta, WLAN_STA_PS) &&
|
|
skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
|
|
ieee80211_remove_tx_extra(local, sta->key, skb);
|
|
skb_queue_tail(&sta->tx_filtered, skb);
|
|
return;
|
|
}
|
|
|
|
if (!test_sta_flags(sta, WLAN_STA_PS) &&
|
|
!(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
|
|
/* Software retry the packet once */
|
|
info->flags |= IEEE80211_TX_CTL_REQUEUE;
|
|
ieee80211_remove_tx_extra(local, sta->key, skb);
|
|
dev_queue_xmit(skb);
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit())
|
|
printk(KERN_DEBUG "%s: dropped TX filtered frame, "
|
|
"queue_len=%d PS=%d @%lu\n",
|
|
wiphy_name(local->hw.wiphy),
|
|
skb_queue_len(&sta->tx_filtered),
|
|
!!test_sta_flags(sta, WLAN_STA_PS), jiffies);
|
|
#endif
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *skb2;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
u16 frag, type;
|
|
__le16 fc;
|
|
struct ieee80211_tx_status_rtap_hdr *rthdr;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct net_device *prev_dev = NULL;
|
|
struct sta_info *sta;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, hdr->addr1);
|
|
|
|
if (sta) {
|
|
if (info->status.excessive_retries &&
|
|
test_sta_flags(sta, WLAN_STA_PS)) {
|
|
/*
|
|
* The STA is in power save mode, so assume
|
|
* that this TX packet failed because of that.
|
|
*/
|
|
ieee80211_handle_filtered_frame(local, sta, skb);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
fc = hdr->frame_control;
|
|
|
|
if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
|
|
(ieee80211_is_data_qos(fc))) {
|
|
u16 tid, ssn;
|
|
u8 *qc;
|
|
|
|
qc = ieee80211_get_qos_ctl(hdr);
|
|
tid = qc[0] & 0xf;
|
|
ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
|
|
& IEEE80211_SCTL_SEQ);
|
|
ieee80211_send_bar(sta->sdata, hdr->addr1,
|
|
tid, ssn);
|
|
}
|
|
|
|
if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
|
|
ieee80211_handle_filtered_frame(local, sta, skb);
|
|
rcu_read_unlock();
|
|
return;
|
|
} else {
|
|
if (info->status.excessive_retries)
|
|
sta->tx_retry_failed++;
|
|
sta->tx_retry_count += info->status.retry_count;
|
|
}
|
|
|
|
rate_control_tx_status(local->mdev, skb);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
ieee80211_led_tx(local, 0);
|
|
|
|
/* SNMP counters
|
|
* Fragments are passed to low-level drivers as separate skbs, so these
|
|
* are actually fragments, not frames. Update frame counters only for
|
|
* the first fragment of the frame. */
|
|
|
|
frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
|
|
type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
|
|
|
|
if (info->flags & IEEE80211_TX_STAT_ACK) {
|
|
if (frag == 0) {
|
|
local->dot11TransmittedFrameCount++;
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
local->dot11MulticastTransmittedFrameCount++;
|
|
if (info->status.retry_count > 0)
|
|
local->dot11RetryCount++;
|
|
if (info->status.retry_count > 1)
|
|
local->dot11MultipleRetryCount++;
|
|
}
|
|
|
|
/* This counter shall be incremented for an acknowledged MPDU
|
|
* with an individual address in the address 1 field or an MPDU
|
|
* with a multicast address in the address 1 field of type Data
|
|
* or Management. */
|
|
if (!is_multicast_ether_addr(hdr->addr1) ||
|
|
type == IEEE80211_FTYPE_DATA ||
|
|
type == IEEE80211_FTYPE_MGMT)
|
|
local->dot11TransmittedFragmentCount++;
|
|
} else {
|
|
if (frag == 0)
|
|
local->dot11FailedCount++;
|
|
}
|
|
|
|
/* this was a transmitted frame, but now we want to reuse it */
|
|
skb_orphan(skb);
|
|
|
|
/*
|
|
* This is a bit racy but we can avoid a lot of work
|
|
* with this test...
|
|
*/
|
|
if (!local->monitors && !local->cooked_mntrs) {
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
/* send frame to monitor interfaces now */
|
|
|
|
if (skb_headroom(skb) < sizeof(*rthdr)) {
|
|
printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
rthdr = (struct ieee80211_tx_status_rtap_hdr *)
|
|
skb_push(skb, sizeof(*rthdr));
|
|
|
|
memset(rthdr, 0, sizeof(*rthdr));
|
|
rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
|
|
rthdr->hdr.it_present =
|
|
cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
|
|
(1 << IEEE80211_RADIOTAP_DATA_RETRIES));
|
|
|
|
if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
|
|
!is_multicast_ether_addr(hdr->addr1))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
|
|
|
|
if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
|
|
(info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
|
|
else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
|
|
|
|
rthdr->data_retries = info->status.retry_count;
|
|
|
|
/* XXX: is this sufficient for BPF? */
|
|
skb_set_mac_header(skb, 0);
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
skb->protocol = htons(ETH_P_802_2);
|
|
memset(skb->cb, 0, sizeof(skb->cb));
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
|
|
if (prev_dev) {
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
if (skb2) {
|
|
skb2->dev = prev_dev;
|
|
netif_rx(skb2);
|
|
}
|
|
}
|
|
|
|
prev_dev = sdata->dev;
|
|
}
|
|
}
|
|
if (prev_dev) {
|
|
skb->dev = prev_dev;
|
|
netif_rx(skb);
|
|
skb = NULL;
|
|
}
|
|
rcu_read_unlock();
|
|
dev_kfree_skb(skb);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tx_status);
|
|
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
const struct ieee80211_ops *ops)
|
|
{
|
|
struct ieee80211_local *local;
|
|
int priv_size;
|
|
struct wiphy *wiphy;
|
|
|
|
/* Ensure 32-byte alignment of our private data and hw private data.
|
|
* We use the wiphy priv data for both our ieee80211_local and for
|
|
* the driver's private data
|
|
*
|
|
* In memory it'll be like this:
|
|
*
|
|
* +-------------------------+
|
|
* | struct wiphy |
|
|
* +-------------------------+
|
|
* | struct ieee80211_local |
|
|
* +-------------------------+
|
|
* | driver's private data |
|
|
* +-------------------------+
|
|
*
|
|
*/
|
|
priv_size = ((sizeof(struct ieee80211_local) +
|
|
NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
|
|
priv_data_len;
|
|
|
|
wiphy = wiphy_new(&mac80211_config_ops, priv_size);
|
|
|
|
if (!wiphy)
|
|
return NULL;
|
|
|
|
wiphy->privid = mac80211_wiphy_privid;
|
|
|
|
local = wiphy_priv(wiphy);
|
|
local->hw.wiphy = wiphy;
|
|
|
|
local->hw.priv = (char *)local +
|
|
((sizeof(struct ieee80211_local) +
|
|
NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
|
|
|
|
BUG_ON(!ops->tx);
|
|
BUG_ON(!ops->start);
|
|
BUG_ON(!ops->stop);
|
|
BUG_ON(!ops->config);
|
|
BUG_ON(!ops->add_interface);
|
|
BUG_ON(!ops->remove_interface);
|
|
BUG_ON(!ops->configure_filter);
|
|
local->ops = ops;
|
|
|
|
local->hw.queues = 1; /* default */
|
|
|
|
local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
|
|
local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
|
|
local->short_retry_limit = 7;
|
|
local->long_retry_limit = 4;
|
|
local->hw.conf.radio_enabled = 1;
|
|
|
|
INIT_LIST_HEAD(&local->interfaces);
|
|
|
|
spin_lock_init(&local->key_lock);
|
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
|
|
|
|
sta_info_init(local);
|
|
|
|
tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
|
|
(unsigned long)local);
|
|
tasklet_disable(&local->tx_pending_tasklet);
|
|
|
|
tasklet_init(&local->tasklet,
|
|
ieee80211_tasklet_handler,
|
|
(unsigned long) local);
|
|
tasklet_disable(&local->tasklet);
|
|
|
|
skb_queue_head_init(&local->skb_queue);
|
|
skb_queue_head_init(&local->skb_queue_unreliable);
|
|
|
|
return local_to_hw(local);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_alloc_hw);
|
|
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
const char *name;
|
|
int result;
|
|
enum ieee80211_band band;
|
|
struct net_device *mdev;
|
|
struct wireless_dev *mwdev;
|
|
|
|
/*
|
|
* generic code guarantees at least one band,
|
|
* set this very early because much code assumes
|
|
* that hw.conf.channel is assigned
|
|
*/
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
struct ieee80211_supported_band *sband;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
if (sband) {
|
|
/* init channel we're on */
|
|
local->hw.conf.channel =
|
|
local->oper_channel =
|
|
local->scan_channel = &sband->channels[0];
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* if low-level driver supports AP, we also support VLAN */
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
|
|
|
|
/* mac80211 always supports monitor */
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
|
|
|
result = wiphy_register(local->hw.wiphy);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
/*
|
|
* We use the number of queues for feature tests (QoS, HT) internally
|
|
* so restrict them appropriately.
|
|
*/
|
|
if (hw->queues > IEEE80211_MAX_QUEUES)
|
|
hw->queues = IEEE80211_MAX_QUEUES;
|
|
if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
|
|
hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
|
|
if (hw->queues < 4)
|
|
hw->ampdu_queues = 0;
|
|
|
|
mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
|
|
"wmaster%d", ether_setup,
|
|
ieee80211_num_queues(hw));
|
|
if (!mdev)
|
|
goto fail_mdev_alloc;
|
|
|
|
mwdev = netdev_priv(mdev);
|
|
mdev->ieee80211_ptr = mwdev;
|
|
mwdev->wiphy = local->hw.wiphy;
|
|
|
|
local->mdev = mdev;
|
|
|
|
ieee80211_rx_bss_list_init(local);
|
|
|
|
mdev->hard_start_xmit = ieee80211_master_start_xmit;
|
|
mdev->open = ieee80211_master_open;
|
|
mdev->stop = ieee80211_master_stop;
|
|
mdev->type = ARPHRD_IEEE80211;
|
|
mdev->header_ops = &ieee80211_header_ops;
|
|
mdev->set_multicast_list = ieee80211_master_set_multicast_list;
|
|
|
|
name = wiphy_dev(local->hw.wiphy)->driver->name;
|
|
local->hw.workqueue = create_freezeable_workqueue(name);
|
|
if (!local->hw.workqueue) {
|
|
result = -ENOMEM;
|
|
goto fail_workqueue;
|
|
}
|
|
|
|
/*
|
|
* The hardware needs headroom for sending the frame,
|
|
* and we need some headroom for passing the frame to monitor
|
|
* interfaces, but never both at the same time.
|
|
*/
|
|
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
|
|
debugfs_hw_add(local);
|
|
|
|
if (local->hw.conf.beacon_int < 10)
|
|
local->hw.conf.beacon_int = 100;
|
|
|
|
if (local->hw.max_listen_interval == 0)
|
|
local->hw.max_listen_interval = 1;
|
|
|
|
local->hw.conf.listen_interval = local->hw.max_listen_interval;
|
|
|
|
local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
|
|
IEEE80211_HW_SIGNAL_DB |
|
|
IEEE80211_HW_SIGNAL_DBM) ?
|
|
IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
|
|
local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
|
|
IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
|
|
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
|
|
local->wstats_flags |= IW_QUAL_DBM;
|
|
|
|
result = sta_info_start(local);
|
|
if (result < 0)
|
|
goto fail_sta_info;
|
|
|
|
rtnl_lock();
|
|
result = dev_alloc_name(local->mdev, local->mdev->name);
|
|
if (result < 0)
|
|
goto fail_dev;
|
|
|
|
memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
|
|
SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
|
|
|
|
result = register_netdevice(local->mdev);
|
|
if (result < 0)
|
|
goto fail_dev;
|
|
|
|
result = ieee80211_init_rate_ctrl_alg(local,
|
|
hw->rate_control_algorithm);
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize rate control "
|
|
"algorithm\n", wiphy_name(local->hw.wiphy));
|
|
goto fail_rate;
|
|
}
|
|
|
|
result = ieee80211_wep_init(local);
|
|
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
|
|
wiphy_name(local->hw.wiphy), result);
|
|
goto fail_wep;
|
|
}
|
|
|
|
local->mdev->select_queue = ieee80211_select_queue;
|
|
|
|
/* add one default STA interface */
|
|
result = ieee80211_if_add(local, "wlan%d", NULL,
|
|
NL80211_IFTYPE_STATION, NULL);
|
|
if (result)
|
|
printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
return 0;
|
|
|
|
fail_wep:
|
|
rate_control_deinitialize(local);
|
|
fail_rate:
|
|
unregister_netdevice(local->mdev);
|
|
local->mdev = NULL;
|
|
fail_dev:
|
|
rtnl_unlock();
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
debugfs_hw_del(local);
|
|
destroy_workqueue(local->hw.workqueue);
|
|
fail_workqueue:
|
|
if (local->mdev)
|
|
free_netdev(local->mdev);
|
|
fail_mdev_alloc:
|
|
wiphy_unregister(local->hw.wiphy);
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_register_hw);
|
|
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
tasklet_kill(&local->tasklet);
|
|
|
|
rtnl_lock();
|
|
|
|
/*
|
|
* At this point, interface list manipulations are fine
|
|
* because the driver cannot be handing us frames any
|
|
* more and the tasklet is killed.
|
|
*/
|
|
|
|
/* First, we remove all virtual interfaces. */
|
|
ieee80211_remove_interfaces(local);
|
|
|
|
/* then, finally, remove the master interface */
|
|
unregister_netdevice(local->mdev);
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_rx_bss_list_deinit(local);
|
|
ieee80211_clear_tx_pending(local);
|
|
sta_info_stop(local);
|
|
rate_control_deinitialize(local);
|
|
debugfs_hw_del(local);
|
|
|
|
if (skb_queue_len(&local->skb_queue)
|
|
|| skb_queue_len(&local->skb_queue_unreliable))
|
|
printk(KERN_WARNING "%s: skb_queue not empty\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
skb_queue_purge(&local->skb_queue);
|
|
skb_queue_purge(&local->skb_queue_unreliable);
|
|
|
|
destroy_workqueue(local->hw.workqueue);
|
|
wiphy_unregister(local->hw.wiphy);
|
|
ieee80211_wep_free(local);
|
|
ieee80211_led_exit(local);
|
|
free_netdev(local->mdev);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
wiphy_free(local->hw.wiphy);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_free_hw);
|
|
|
|
static int __init ieee80211_init(void)
|
|
{
|
|
struct sk_buff *skb;
|
|
int ret;
|
|
|
|
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
|
|
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
|
|
|
|
ret = rc80211_pid_init();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ieee80211_debugfs_netdev_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_pid_exit();
|
|
|
|
/*
|
|
* For key todo, it'll be empty by now but the work
|
|
* might still be scheduled.
|
|
*/
|
|
flush_scheduled_work();
|
|
|
|
if (mesh_allocated)
|
|
ieee80211s_stop();
|
|
|
|
ieee80211_debugfs_netdev_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|