![Johannes Berg](/assets/img/avatar_default.png)
The error handling in ieee80211_init() is broken when any of the built-in rate control algorithms fail to initialise, fix it and rename the error labels. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1388 lines
38 KiB
C
1388 lines
38 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 "ieee80211_rate.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 "ieee80211_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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#define SUPP_MCS_SET_LEN 16
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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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/* common interface routines */
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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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/* must be called under mdev tx lock */
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static 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_CONTROL |
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FIF_OTHER_BSS |
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FIF_BCN_PRBRESP_PROMISC;
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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 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 (sdata->dev != dev && 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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return res;
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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 (sdata->dev != dev && 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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/* regular interfaces */
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static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
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{
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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 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
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printk(KERN_WARNING "%s: invalid MTU %d\n",
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dev->name, new_mtu);
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return -EINVAL;
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}
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#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
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printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
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#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
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dev->mtu = new_mtu;
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return 0;
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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 == IEEE80211_IF_TYPE_MNTR ||
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type2 == IEEE80211_IF_TYPE_MNTR ||
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(type1 == IEEE80211_IF_TYPE_AP &&
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type2 == IEEE80211_IF_TYPE_WDS) ||
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(type1 == IEEE80211_IF_TYPE_WDS &&
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(type2 == IEEE80211_IF_TYPE_WDS ||
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type2 == IEEE80211_IF_TYPE_AP)) ||
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(type1 == IEEE80211_IF_TYPE_AP &&
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type2 == IEEE80211_IF_TYPE_VLAN) ||
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(type1 == IEEE80211_IF_TYPE_VLAN &&
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(type2 == IEEE80211_IF_TYPE_AP ||
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type2 == IEEE80211_IF_TYPE_VLAN)));
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}
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static int ieee80211_open(struct net_device *dev)
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{
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struct ieee80211_sub_if_data *sdata, *nsdata;
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_if_init_conf conf;
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int res;
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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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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struct net_device *ndev = nsdata->dev;
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if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
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compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
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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(sdata->vif.type,
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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 (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
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nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
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netif_running(nsdata->dev))
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sdata->u.vlan.ap = nsdata;
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}
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}
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_WDS:
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if (is_zero_ether_addr(sdata->u.wds.remote_addr))
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return -ENOLINK;
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break;
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case IEEE80211_IF_TYPE_VLAN:
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if (!sdata->u.vlan.ap)
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return -ENOLINK;
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break;
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case IEEE80211_IF_TYPE_AP:
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_MNTR:
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case IEEE80211_IF_TYPE_IBSS:
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/* no special treatment */
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break;
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case IEEE80211_IF_TYPE_INVALID:
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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 = 0;
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if (local->ops->start)
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res = local->ops->start(local_to_hw(local));
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if (res)
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return res;
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ieee80211_hw_config(local);
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ieee80211_led_radio(local, local->hw.conf.radio_enabled);
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}
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_VLAN:
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list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
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/* no need to tell driver */
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break;
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case IEEE80211_IF_TYPE_MNTR:
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/* must be before the call to ieee80211_configure_filter */
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local->monitors++;
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if (local->monitors == 1) {
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netif_tx_lock_bh(local->mdev);
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ieee80211_configure_filter(local);
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netif_tx_unlock_bh(local->mdev);
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local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
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}
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break;
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
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/* fall through */
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default:
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conf.vif = &sdata->vif;
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conf.type = sdata->vif.type;
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conf.mac_addr = dev->dev_addr;
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res = local->ops->add_interface(local_to_hw(local), &conf);
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if (res && !local->open_count && local->ops->stop)
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local->ops->stop(local_to_hw(local));
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if (res)
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return res;
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ieee80211_if_config(dev);
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ieee80211_reset_erp_info(dev);
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ieee80211_enable_keys(sdata);
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if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
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!(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
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netif_carrier_off(dev);
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else
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netif_carrier_on(dev);
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}
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if (local->open_count == 0) {
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res = dev_open(local->mdev);
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WARN_ON(res);
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tasklet_enable(&local->tx_pending_tasklet);
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tasklet_enable(&local->tasklet);
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}
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/*
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* set_multicast_list will be invoked by the networking core
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* which will check whether any increments here were done in
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* error and sync them down to the hardware as filter flags.
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*/
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if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
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atomic_inc(&local->iff_allmultis);
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if (sdata->flags & IEEE80211_SDATA_PROMISC)
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atomic_inc(&local->iff_promiscs);
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local->open_count++;
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netif_start_queue(dev);
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return 0;
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}
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static int ieee80211_stop(struct net_device *dev)
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{
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_if_init_conf conf;
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struct sta_info *sta;
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int i;
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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list_for_each_entry(sta, &local->sta_list, list) {
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if (sta->dev == dev)
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for (i = 0; i < STA_TID_NUM; i++)
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ieee80211_sta_stop_rx_ba_session(sta->dev,
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sta->addr, i,
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WLAN_BACK_RECIPIENT,
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WLAN_REASON_QSTA_LEAVE_QBSS);
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}
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netif_stop_queue(dev);
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/*
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* Don't count this interface for promisc/allmulti while it
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* is down. dev_mc_unsync() will invoke set_multicast_list
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* on the master interface which will sync these down to the
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* hardware as filter flags.
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*/
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if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
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atomic_dec(&local->iff_allmultis);
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if (sdata->flags & IEEE80211_SDATA_PROMISC)
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atomic_dec(&local->iff_promiscs);
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dev_mc_unsync(local->mdev, dev);
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/* APs need special treatment */
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if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
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struct ieee80211_sub_if_data *vlan, *tmp;
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struct beacon_data *old_beacon = sdata->u.ap.beacon;
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/* remove beacon */
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rcu_assign_pointer(sdata->u.ap.beacon, NULL);
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synchronize_rcu();
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kfree(old_beacon);
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/* down all dependent devices, that is VLANs */
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list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
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u.vlan.list)
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dev_close(vlan->dev);
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WARN_ON(!list_empty(&sdata->u.ap.vlans));
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}
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local->open_count--;
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_VLAN:
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list_del(&sdata->u.vlan.list);
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sdata->u.vlan.ap = NULL;
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/* no need to tell driver */
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break;
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case IEEE80211_IF_TYPE_MNTR:
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local->monitors--;
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if (local->monitors == 0) {
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netif_tx_lock_bh(local->mdev);
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ieee80211_configure_filter(local);
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netif_tx_unlock_bh(local->mdev);
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local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
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}
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break;
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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sdata->u.sta.state = IEEE80211_DISABLED;
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del_timer_sync(&sdata->u.sta.timer);
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/*
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* When we get here, the interface is marked down.
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* Call synchronize_rcu() to wait for the RX path
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* should it be using the interface and enqueuing
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* frames at this very time on another CPU.
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*/
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synchronize_rcu();
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skb_queue_purge(&sdata->u.sta.skb_queue);
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if (local->scan_dev == sdata->dev) {
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if (!local->ops->hw_scan) {
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local->sta_sw_scanning = 0;
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cancel_delayed_work(&local->scan_work);
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} else
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local->sta_hw_scanning = 0;
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}
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flush_workqueue(local->hw.workqueue);
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sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
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kfree(sdata->u.sta.extra_ie);
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sdata->u.sta.extra_ie = NULL;
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sdata->u.sta.extra_ie_len = 0;
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/* fall through */
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default:
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conf.vif = &sdata->vif;
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conf.type = sdata->vif.type;
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conf.mac_addr = dev->dev_addr;
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/* disable all keys for as long as this netdev is down */
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ieee80211_disable_keys(sdata);
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local->ops->remove_interface(local_to_hw(local), &conf);
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}
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if (local->open_count == 0) {
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if (netif_running(local->mdev))
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dev_close(local->mdev);
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if (local->ops->stop)
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local->ops->stop(local_to_hw(local));
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ieee80211_led_radio(local, 0);
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tasklet_disable(&local->tx_pending_tasklet);
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tasklet_disable(&local->tasklet);
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}
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return 0;
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}
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static void ieee80211_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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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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int allmulti, promisc, sdata_allmulti, sdata_promisc;
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allmulti = !!(dev->flags & IFF_ALLMULTI);
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promisc = !!(dev->flags & IFF_PROMISC);
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sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
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sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
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if (allmulti != sdata_allmulti) {
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if (dev->flags & IFF_ALLMULTI)
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atomic_inc(&local->iff_allmultis);
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else
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atomic_dec(&local->iff_allmultis);
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sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
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}
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if (promisc != sdata_promisc) {
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if (dev->flags & IFF_PROMISC)
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atomic_inc(&local->iff_promiscs);
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else
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atomic_dec(&local->iff_promiscs);
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sdata->flags ^= IEEE80211_SDATA_PROMISC;
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}
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dev_mc_sync(local->mdev, dev);
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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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/* Must not be called for mdev */
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void ieee80211_if_setup(struct net_device *dev)
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{
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ether_setup(dev);
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dev->hard_start_xmit = ieee80211_subif_start_xmit;
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dev->wireless_handlers = &ieee80211_iw_handler_def;
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dev->set_multicast_list = ieee80211_set_multicast_list;
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dev->change_mtu = ieee80211_change_mtu;
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dev->open = ieee80211_open;
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dev->stop = ieee80211_stop;
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dev->destructor = ieee80211_if_free;
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}
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/* WDS specialties */
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int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
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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 = IEEE80211_DEV_TO_SUB_IF(dev);
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struct sta_info *sta;
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DECLARE_MAC_BUF(mac);
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if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
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return 0;
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/* Create STA entry for the new peer */
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sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
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if (!sta)
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return -ENOMEM;
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sta_info_put(sta);
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/* Remove STA entry for the old peer */
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sta = sta_info_get(local, sdata->u.wds.remote_addr);
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if (sta) {
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sta_info_free(sta);
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sta_info_put(sta);
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} else {
|
|
printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
|
|
"peer %s\n",
|
|
dev->name, print_mac(mac, sdata->u.wds.remote_addr));
|
|
}
|
|
|
|
/* Update WDS link data */
|
|
memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* everything else */
|
|
|
|
static int __ieee80211_if_config(struct net_device *dev,
|
|
struct sk_buff *beacon,
|
|
struct ieee80211_tx_control *control)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
struct ieee80211_if_conf conf;
|
|
|
|
if (!local->ops->config_interface || !netif_running(dev))
|
|
return 0;
|
|
|
|
memset(&conf, 0, sizeof(conf));
|
|
conf.type = sdata->vif.type;
|
|
if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
|
|
sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
|
|
conf.bssid = sdata->u.sta.bssid;
|
|
conf.ssid = sdata->u.sta.ssid;
|
|
conf.ssid_len = sdata->u.sta.ssid_len;
|
|
} else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
|
|
conf.ssid = sdata->u.ap.ssid;
|
|
conf.ssid_len = sdata->u.ap.ssid_len;
|
|
conf.beacon = beacon;
|
|
conf.beacon_control = control;
|
|
}
|
|
return local->ops->config_interface(local_to_hw(local),
|
|
&sdata->vif, &conf);
|
|
}
|
|
|
|
int ieee80211_if_config(struct net_device *dev)
|
|
{
|
|
return __ieee80211_if_config(dev, NULL, NULL);
|
|
}
|
|
|
|
int ieee80211_if_config_beacon(struct net_device *dev)
|
|
{
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
struct ieee80211_tx_control control;
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct sk_buff *skb;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
|
|
return 0;
|
|
skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
|
|
&control);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
return __ieee80211_if_config(dev, skb, &control);
|
|
}
|
|
|
|
int ieee80211_hw_config(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_hw_mode *mode;
|
|
struct ieee80211_channel *chan;
|
|
int ret = 0;
|
|
|
|
if (local->sta_sw_scanning) {
|
|
chan = local->scan_channel;
|
|
mode = local->scan_hw_mode;
|
|
} else {
|
|
chan = local->oper_channel;
|
|
mode = local->oper_hw_mode;
|
|
}
|
|
|
|
local->hw.conf.channel = chan->chan;
|
|
local->hw.conf.channel_val = chan->val;
|
|
if (!local->hw.conf.power_level) {
|
|
local->hw.conf.power_level = chan->power_level;
|
|
} else {
|
|
local->hw.conf.power_level = min(chan->power_level,
|
|
local->hw.conf.power_level);
|
|
}
|
|
local->hw.conf.freq = chan->freq;
|
|
local->hw.conf.phymode = mode->mode;
|
|
local->hw.conf.antenna_max = chan->antenna_max;
|
|
local->hw.conf.chan = chan;
|
|
local->hw.conf.mode = mode;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
|
|
"phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
|
|
local->hw.conf.phymode);
|
|
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
|
|
|
|
if (local->open_count)
|
|
ret = local->ops->config(local_to_hw(local), &local->hw.conf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_hw_config_ht should be used only after legacy configuration
|
|
* has been determined, as ht configuration depends upon the hardware's
|
|
* HT abilities for a _specific_ band.
|
|
*/
|
|
int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
|
|
struct ieee80211_ht_info *req_ht_cap,
|
|
struct ieee80211_ht_bss_info *req_bss_cap)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
struct ieee80211_hw_mode *mode = conf->mode;
|
|
int i;
|
|
|
|
/* HT is not supported */
|
|
if (!mode->ht_info.ht_supported) {
|
|
conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* disable HT */
|
|
if (!enable_ht) {
|
|
conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
|
|
} else {
|
|
conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
|
|
conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
|
|
conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
|
|
conf->ht_conf.cap |=
|
|
mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
|
|
conf->ht_bss_conf.primary_channel =
|
|
req_bss_cap->primary_channel;
|
|
conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
|
|
conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
|
|
for (i = 0; i < SUPP_MCS_SET_LEN; i++)
|
|
conf->ht_conf.supp_mcs_set[i] =
|
|
mode->ht_info.supp_mcs_set[i] &
|
|
req_ht_cap->supp_mcs_set[i];
|
|
|
|
/* In STA mode, this gives us indication
|
|
* to the AP's mode of operation */
|
|
conf->ht_conf.ht_supported = 1;
|
|
conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
|
|
conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
|
|
}
|
|
|
|
local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
|
|
u32 changed)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (!changed)
|
|
return;
|
|
|
|
if (local->ops->bss_info_changed)
|
|
local->ops->bss_info_changed(local_to_hw(local),
|
|
&sdata->vif,
|
|
&sdata->bss_conf,
|
|
changed);
|
|
}
|
|
|
|
void ieee80211_reset_erp_info(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
|
|
sdata->bss_conf.use_cts_prot = 0;
|
|
sdata->bss_conf.use_short_preamble = 0;
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_ERP_CTS_PROT |
|
|
BSS_CHANGED_ERP_PREAMBLE);
|
|
}
|
|
|
|
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_status *status)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_tx_status *saved;
|
|
int tmp;
|
|
|
|
skb->dev = local->mdev;
|
|
saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
|
|
if (unlikely(!saved)) {
|
|
if (net_ratelimit())
|
|
printk(KERN_WARNING "%s: Not enough memory, "
|
|
"dropping tx status", skb->dev->name);
|
|
/* should be dev_kfree_skb_irq, but due to this function being
|
|
* named _irqsafe instead of just _irq we can't be sure that
|
|
* people won't call it from non-irq contexts */
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
memcpy(saved, status, sizeof(struct ieee80211_tx_status));
|
|
/* copy pointer to saved status into skb->cb for use by tasklet */
|
|
memcpy(skb->cb, &saved, sizeof(saved));
|
|
|
|
skb->pkt_type = IEEE80211_TX_STATUS_MSG;
|
|
skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
|
|
&local->skb_queue : &local->skb_queue_unreliable, skb);
|
|
tmp = skb_queue_len(&local->skb_queue) +
|
|
skb_queue_len(&local->skb_queue_unreliable);
|
|
while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
|
|
(skb = skb_dequeue(&local->skb_queue_unreliable))) {
|
|
memcpy(&saved, skb->cb, sizeof(saved));
|
|
kfree(saved);
|
|
dev_kfree_skb_irq(skb);
|
|
tmp--;
|
|
I802_DEBUG_INC(local->tx_status_drop);
|
|
}
|
|
tasklet_schedule(&local->tasklet);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
|
|
|
|
static void ieee80211_tasklet_handler(unsigned long data)
|
|
{
|
|
struct ieee80211_local *local = (struct ieee80211_local *) data;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_rx_status rx_status;
|
|
struct ieee80211_tx_status *tx_status;
|
|
|
|
while ((skb = skb_dequeue(&local->skb_queue)) ||
|
|
(skb = skb_dequeue(&local->skb_queue_unreliable))) {
|
|
switch (skb->pkt_type) {
|
|
case IEEE80211_RX_MSG:
|
|
/* status is in skb->cb */
|
|
memcpy(&rx_status, skb->cb, sizeof(rx_status));
|
|
/* Clear skb->pkt_type in order to not confuse kernel
|
|
* netstack. */
|
|
skb->pkt_type = 0;
|
|
__ieee80211_rx(local_to_hw(local), skb, &rx_status);
|
|
break;
|
|
case IEEE80211_TX_STATUS_MSG:
|
|
/* get pointer to saved status out of skb->cb */
|
|
memcpy(&tx_status, skb->cb, sizeof(tx_status));
|
|
skb->pkt_type = 0;
|
|
ieee80211_tx_status(local_to_hw(local),
|
|
skb, tx_status);
|
|
kfree(tx_status);
|
|
break;
|
|
default: /* should never get here! */
|
|
printk(KERN_ERR "%s: Unknown message type (%d)\n",
|
|
wiphy_name(local->hw.wiphy), skb->pkt_type);
|
|
dev_kfree_skb(skb);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
|
|
* make a prepared TX frame (one that has been given to hw) to look like brand
|
|
* new IEEE 802.11 frame that is ready to go through TX processing again.
|
|
* Also, tx_packet_data in cb is restored from tx_control. */
|
|
static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
|
|
struct ieee80211_key *key,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_control *control)
|
|
{
|
|
int hdrlen, iv_len, mic_len;
|
|
struct ieee80211_tx_packet_data *pkt_data;
|
|
|
|
pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
|
|
pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
|
|
pkt_data->flags = 0;
|
|
if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
|
|
pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
|
|
if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
|
|
pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
|
|
if (control->flags & IEEE80211_TXCTL_REQUEUE)
|
|
pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
|
|
if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
|
|
pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
|
|
pkt_data->queue = control->queue;
|
|
|
|
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
|
|
if (!key)
|
|
goto no_key;
|
|
|
|
switch (key->conf.alg) {
|
|
case ALG_WEP:
|
|
iv_len = WEP_IV_LEN;
|
|
mic_len = WEP_ICV_LEN;
|
|
break;
|
|
case ALG_TKIP:
|
|
iv_len = TKIP_IV_LEN;
|
|
mic_len = TKIP_ICV_LEN;
|
|
break;
|
|
case ALG_CCMP:
|
|
iv_len = CCMP_HDR_LEN;
|
|
mic_len = CCMP_MIC_LEN;
|
|
break;
|
|
default:
|
|
goto no_key;
|
|
}
|
|
|
|
if (skb->len >= mic_len &&
|
|
!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
|
skb_trim(skb, skb->len - mic_len);
|
|
if (skb->len >= iv_len && skb->len > hdrlen) {
|
|
memmove(skb->data + iv_len, skb->data, hdrlen);
|
|
skb_pull(skb, iv_len);
|
|
}
|
|
|
|
no_key:
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
u16 fc = le16_to_cpu(hdr->frame_control);
|
|
if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
|
|
fc &= ~IEEE80211_STYPE_QOS_DATA;
|
|
hdr->frame_control = cpu_to_le16(fc);
|
|
memmove(skb->data + 2, skb->data, hdrlen - 2);
|
|
skb_pull(skb, 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_tx_status *status)
|
|
{
|
|
struct sk_buff *skb2;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
u16 frag, type;
|
|
struct ieee80211_tx_status_rtap_hdr *rthdr;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
int monitors;
|
|
|
|
if (!status) {
|
|
printk(KERN_ERR
|
|
"%s: ieee80211_tx_status called with NULL status\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
if (status->excessive_retries) {
|
|
struct sta_info *sta;
|
|
sta = sta_info_get(local, hdr->addr1);
|
|
if (sta) {
|
|
if (sta->flags & WLAN_STA_PS) {
|
|
/* The STA is in power save mode, so assume
|
|
* that this TX packet failed because of that.
|
|
*/
|
|
status->excessive_retries = 0;
|
|
status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
|
|
}
|
|
sta_info_put(sta);
|
|
}
|
|
}
|
|
|
|
if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
|
|
struct sta_info *sta;
|
|
sta = sta_info_get(local, hdr->addr1);
|
|
if (sta) {
|
|
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 is waking up for the next
|
|
* time. */
|
|
sta->clear_dst_mask = 1;
|
|
|
|
/* TODO: Is the WLAN_STA_PS flag always set here or is
|
|
* the race between RX and TX status causing some
|
|
* packets to be filtered out before 80211.o gets an
|
|
* update for PS status? This seems to be the case, so
|
|
* no changes are likely to be needed. */
|
|
if (sta->flags & WLAN_STA_PS &&
|
|
skb_queue_len(&sta->tx_filtered) <
|
|
STA_MAX_TX_BUFFER) {
|
|
ieee80211_remove_tx_extra(local, sta->key,
|
|
skb,
|
|
&status->control);
|
|
skb_queue_tail(&sta->tx_filtered, skb);
|
|
} else if (!(sta->flags & WLAN_STA_PS) &&
|
|
!(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
|
|
/* Software retry the packet once */
|
|
status->control.flags |= IEEE80211_TXCTL_REQUEUE;
|
|
ieee80211_remove_tx_extra(local, sta->key,
|
|
skb,
|
|
&status->control);
|
|
dev_queue_xmit(skb);
|
|
} else {
|
|
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),
|
|
!!(sta->flags & WLAN_STA_PS),
|
|
jiffies);
|
|
}
|
|
dev_kfree_skb(skb);
|
|
}
|
|
sta_info_put(sta);
|
|
return;
|
|
}
|
|
} else
|
|
rate_control_tx_status(local->mdev, skb, status);
|
|
|
|
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 (status->flags & IEEE80211_TX_STATUS_ACK) {
|
|
if (frag == 0) {
|
|
local->dot11TransmittedFrameCount++;
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
local->dot11MulticastTransmittedFrameCount++;
|
|
if (status->retry_count > 0)
|
|
local->dot11RetryCount++;
|
|
if (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);
|
|
|
|
if (!local->monitors) {
|
|
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 (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
|
|
!is_multicast_ether_addr(hdr->addr1))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
|
|
|
|
if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
|
|
(status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
|
|
else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
|
|
|
|
rthdr->data_retries = status->retry_count;
|
|
|
|
rcu_read_lock();
|
|
monitors = local->monitors;
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
/*
|
|
* Using the monitors counter is possibly racy, but
|
|
* if the value is wrong we simply either clone the skb
|
|
* once too much or forget sending it to one monitor iface
|
|
* The latter case isn't nice but fixing the race is much
|
|
* more complicated.
|
|
*/
|
|
if (!monitors || !skb)
|
|
goto out;
|
|
|
|
if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
monitors--;
|
|
if (monitors)
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
else
|
|
skb2 = NULL;
|
|
skb->dev = sdata->dev;
|
|
/* 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));
|
|
netif_rx(skb);
|
|
skb = skb2;
|
|
}
|
|
}
|
|
out:
|
|
rcu_read_unlock();
|
|
if (skb)
|
|
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 net_device *mdev;
|
|
struct ieee80211_local *local;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
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;
|
|
|
|
/* for now, mdev needs sub_if_data :/ */
|
|
mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
|
|
"wmaster%d", ether_setup);
|
|
if (!mdev) {
|
|
wiphy_free(wiphy);
|
|
return NULL;
|
|
}
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
|
|
mdev->ieee80211_ptr = &sdata->wdev;
|
|
sdata->wdev.wiphy = wiphy;
|
|
|
|
local->hw.queues = 1; /* default */
|
|
|
|
local->mdev = mdev;
|
|
local->rx_pre_handlers = ieee80211_rx_pre_handlers;
|
|
local->rx_handlers = ieee80211_rx_handlers;
|
|
local->tx_handlers = ieee80211_tx_handlers;
|
|
|
|
local->bridge_packets = 1;
|
|
|
|
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;
|
|
|
|
local->enabled_modes = ~0;
|
|
|
|
INIT_LIST_HEAD(&local->modes_list);
|
|
|
|
INIT_LIST_HEAD(&local->interfaces);
|
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
|
|
ieee80211_rx_bss_list_init(mdev);
|
|
|
|
sta_info_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;
|
|
|
|
sdata->vif.type = IEEE80211_IF_TYPE_AP;
|
|
sdata->dev = mdev;
|
|
sdata->local = local;
|
|
sdata->u.ap.force_unicast_rateidx = -1;
|
|
sdata->u.ap.max_ratectrl_rateidx = -1;
|
|
ieee80211_if_sdata_init(sdata);
|
|
/* no RCU needed since we're still during init phase */
|
|
list_add_tail(&sdata->list, &local->interfaces);
|
|
|
|
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;
|
|
|
|
result = wiphy_register(local->hw.wiphy);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
name = wiphy_dev(local->hw.wiphy)->driver->name;
|
|
local->hw.workqueue = create_singlethread_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);
|
|
|
|
local->hw.conf.beacon_int = 1000;
|
|
|
|
local->wstats_flags |= local->hw.max_rssi ?
|
|
IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
|
|
local->wstats_flags |= local->hw.max_signal ?
|
|
IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
|
|
local->wstats_flags |= local->hw.max_noise ?
|
|
IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
|
|
if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
|
|
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;
|
|
|
|
ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
|
|
ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
|
|
|
|
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\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
goto fail_wep;
|
|
}
|
|
|
|
ieee80211_install_qdisc(local->mdev);
|
|
|
|
/* add one default STA interface */
|
|
result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
|
|
IEEE80211_IF_TYPE_STA);
|
|
if (result)
|
|
printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
|
|
local->reg_state = IEEE80211_DEV_REGISTERED;
|
|
rtnl_unlock();
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
return 0;
|
|
|
|
fail_wep:
|
|
rate_control_deinitialize(local);
|
|
fail_rate:
|
|
ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
|
|
unregister_netdevice(local->mdev);
|
|
fail_dev:
|
|
rtnl_unlock();
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
debugfs_hw_del(local);
|
|
destroy_workqueue(local->hw.workqueue);
|
|
fail_workqueue:
|
|
wiphy_unregister(local->hw.wiphy);
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_register_hw);
|
|
|
|
int ieee80211_register_hwmode(struct ieee80211_hw *hw,
|
|
struct ieee80211_hw_mode *mode)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_rate *rate;
|
|
int i;
|
|
|
|
INIT_LIST_HEAD(&mode->list);
|
|
list_add_tail(&mode->list, &local->modes_list);
|
|
|
|
local->hw_modes |= (1 << mode->mode);
|
|
for (i = 0; i < mode->num_rates; i++) {
|
|
rate = &(mode->rates[i]);
|
|
rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
|
|
}
|
|
ieee80211_prepare_rates(local, mode);
|
|
|
|
if (!local->oper_hw_mode) {
|
|
/* Default to this mode */
|
|
local->hw.conf.phymode = mode->mode;
|
|
local->oper_hw_mode = local->scan_hw_mode = mode;
|
|
local->oper_channel = local->scan_channel = &mode->channels[0];
|
|
local->hw.conf.mode = local->oper_hw_mode;
|
|
local->hw.conf.chan = local->oper_channel;
|
|
}
|
|
|
|
if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
|
|
ieee80211_set_default_regdomain(mode);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_register_hwmode);
|
|
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_sub_if_data *sdata, *tmp;
|
|
int i;
|
|
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
tasklet_kill(&local->tasklet);
|
|
|
|
rtnl_lock();
|
|
|
|
BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
|
|
|
|
local->reg_state = IEEE80211_DEV_UNREGISTERED;
|
|
|
|
/*
|
|
* 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 non-master interfaces. Do this because they
|
|
* may have bss pointer dependency on the master, and when we free
|
|
* the master these would be freed as well, breaking our list
|
|
* iteration completely.
|
|
*/
|
|
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
|
|
if (sdata->dev == local->mdev)
|
|
continue;
|
|
list_del(&sdata->list);
|
|
__ieee80211_if_del(local, sdata);
|
|
}
|
|
|
|
/* then, finally, remove the master interface */
|
|
__ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_rx_bss_list_deinit(local->mdev);
|
|
ieee80211_clear_tx_pending(local);
|
|
sta_info_stop(local);
|
|
rate_control_deinitialize(local);
|
|
debugfs_hw_del(local);
|
|
|
|
for (i = 0; i < NUM_IEEE80211_MODES; i++) {
|
|
kfree(local->supp_rates[i]);
|
|
kfree(local->basic_rates[i]);
|
|
}
|
|
|
|
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);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
ieee80211_if_free(local->mdev);
|
|
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_packet_data) > sizeof(skb->cb));
|
|
|
|
ret = rc80211_simple_init();
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = rc80211_pid_init();
|
|
if (ret)
|
|
goto out_cleanup_simple;
|
|
|
|
ret = ieee80211_wme_register();
|
|
if (ret) {
|
|
printk(KERN_DEBUG "ieee80211_init: failed to "
|
|
"initialize WME (err=%d)\n", ret);
|
|
goto out_cleanup_pid;
|
|
}
|
|
|
|
ieee80211_debugfs_netdev_init();
|
|
ieee80211_regdomain_init();
|
|
|
|
return 0;
|
|
|
|
out_cleanup_pid:
|
|
rc80211_pid_exit();
|
|
out_cleanup_simple:
|
|
rc80211_simple_exit();
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_simple_exit();
|
|
rc80211_pid_exit();
|
|
|
|
ieee80211_wme_unregister();
|
|
ieee80211_debugfs_netdev_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|