aee14ceb52
ieee80211_free_keys() must be called before ieee80211_debugfs_remove_netdev() in order to make sure that the possible default_key symlink is removed before attempting to remove the netdev debugfs directory. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
268 lines
6.7 KiB
C
268 lines
6.7 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 (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "sta_info.h"
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#include "debugfs_netdev.h"
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#include "mesh.h"
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/*
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* Called when the netdev is removed or, by the code below, before
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* the interface type changes.
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*/
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static void ieee80211_teardown_sdata(struct net_device *dev)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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struct ieee80211_local *local = sdata->local;
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struct beacon_data *beacon;
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struct sk_buff *skb;
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int flushed;
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int i;
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/* free extra data */
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ieee80211_free_keys(sdata);
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ieee80211_debugfs_remove_netdev(sdata);
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for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
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__skb_queue_purge(&sdata->fragments[i].skb_list);
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sdata->fragment_next = 0;
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_AP:
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beacon = sdata->u.ap.beacon;
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rcu_assign_pointer(sdata->u.ap.beacon, NULL);
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synchronize_rcu();
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kfree(beacon);
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while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
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local->total_ps_buffered--;
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dev_kfree_skb(skb);
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}
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break;
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case IEEE80211_IF_TYPE_MESH_POINT:
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/* Allow compiler to elide mesh_rmc_free call. */
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if (ieee80211_vif_is_mesh(&sdata->vif))
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mesh_rmc_free(sdata);
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/* fall through */
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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kfree(sdata->u.sta.extra_ie);
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kfree(sdata->u.sta.assocreq_ies);
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kfree(sdata->u.sta.assocresp_ies);
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kfree_skb(sdata->u.sta.probe_resp);
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break;
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case IEEE80211_IF_TYPE_WDS:
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case IEEE80211_IF_TYPE_VLAN:
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case IEEE80211_IF_TYPE_MNTR:
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break;
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case IEEE80211_IF_TYPE_INVALID:
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BUG();
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break;
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}
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flushed = sta_info_flush(local, sdata);
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WARN_ON(flushed);
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}
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/*
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* Helper function to initialise an interface to a specific type.
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*/
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static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
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enum ieee80211_if_types type)
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{
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struct ieee80211_if_sta *ifsta;
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/* clear type-dependent union */
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memset(&sdata->u, 0, sizeof(sdata->u));
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/* and set some type-dependent values */
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sdata->vif.type = type;
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/* only monitor differs */
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sdata->dev->type = ARPHRD_ETHER;
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switch (type) {
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case IEEE80211_IF_TYPE_AP:
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skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
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INIT_LIST_HEAD(&sdata->u.ap.vlans);
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break;
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case IEEE80211_IF_TYPE_MESH_POINT:
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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ifsta = &sdata->u.sta;
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INIT_WORK(&ifsta->work, ieee80211_sta_work);
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setup_timer(&ifsta->timer, ieee80211_sta_timer,
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(unsigned long) sdata);
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skb_queue_head_init(&ifsta->skb_queue);
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ifsta->capab = WLAN_CAPABILITY_ESS;
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ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
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IEEE80211_AUTH_ALG_SHARED_KEY;
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ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
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IEEE80211_STA_AUTO_BSSID_SEL |
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IEEE80211_STA_AUTO_CHANNEL_SEL;
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if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
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ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
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if (ieee80211_vif_is_mesh(&sdata->vif))
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ieee80211_mesh_init_sdata(sdata);
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break;
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case IEEE80211_IF_TYPE_MNTR:
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sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
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sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit;
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sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
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MONITOR_FLAG_OTHER_BSS;
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break;
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case IEEE80211_IF_TYPE_WDS:
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case IEEE80211_IF_TYPE_VLAN:
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break;
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case IEEE80211_IF_TYPE_INVALID:
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BUG();
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break;
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}
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ieee80211_debugfs_add_netdev(sdata);
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}
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int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
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enum ieee80211_if_types type)
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{
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ASSERT_RTNL();
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if (type == sdata->vif.type)
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return 0;
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/*
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* We could, here, on changes between IBSS/STA/MESH modes,
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* invoke an MLME function instead that disassociates etc.
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* and goes into the requested mode.
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*/
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if (netif_running(sdata->dev))
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return -EBUSY;
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/* Purge and reset type-dependent state. */
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ieee80211_teardown_sdata(sdata->dev);
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ieee80211_setup_sdata(sdata, type);
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/* reset some values that shouldn't be kept across type changes */
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sdata->basic_rates = 0;
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sdata->drop_unencrypted = 0;
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return 0;
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}
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int ieee80211_if_add(struct ieee80211_local *local, const char *name,
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struct net_device **new_dev, enum ieee80211_if_types type,
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struct vif_params *params)
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{
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struct net_device *ndev;
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struct ieee80211_sub_if_data *sdata = NULL;
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int ret, i;
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ASSERT_RTNL();
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ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
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name, ieee80211_if_setup);
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if (!ndev)
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return -ENOMEM;
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ndev->needed_headroom = local->tx_headroom +
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4*6 /* four MAC addresses */
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+ 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
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+ 6 /* mesh */
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+ 8 /* rfc1042/bridge tunnel */
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- ETH_HLEN /* ethernet hard_header_len */
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+ IEEE80211_ENCRYPT_HEADROOM;
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ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
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ret = dev_alloc_name(ndev, ndev->name);
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if (ret < 0)
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goto fail;
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memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
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SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
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/* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
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sdata = netdev_priv(ndev);
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ndev->ieee80211_ptr = &sdata->wdev;
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/* initialise type-independent data */
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sdata->wdev.wiphy = local->hw.wiphy;
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sdata->local = local;
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sdata->dev = ndev;
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for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
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skb_queue_head_init(&sdata->fragments[i].skb_list);
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INIT_LIST_HEAD(&sdata->key_list);
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sdata->force_unicast_rateidx = -1;
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sdata->max_ratectrl_rateidx = -1;
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/* setup type-dependent data */
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ieee80211_setup_sdata(sdata, type);
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ret = register_netdevice(ndev);
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if (ret)
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goto fail;
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ndev->uninit = ieee80211_teardown_sdata;
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if (ieee80211_vif_is_mesh(&sdata->vif) &&
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params && params->mesh_id_len)
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ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
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params->mesh_id_len,
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params->mesh_id);
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list_add_tail_rcu(&sdata->list, &local->interfaces);
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if (new_dev)
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*new_dev = ndev;
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return 0;
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fail:
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free_netdev(ndev);
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return ret;
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}
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void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
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{
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ASSERT_RTNL();
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list_del_rcu(&sdata->list);
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synchronize_rcu();
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unregister_netdevice(sdata->dev);
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}
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/*
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* Remove all interfaces, may only be called at hardware unregistration
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* time because it doesn't do RCU-safe list removals.
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*/
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void ieee80211_remove_interfaces(struct ieee80211_local *local)
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{
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struct ieee80211_sub_if_data *sdata, *tmp;
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ASSERT_RTNL();
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list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
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list_del(&sdata->list);
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unregister_netdevice(sdata->dev);
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}
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}
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