mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 01:54:09 +08:00
f36fe0a2df
When we create a station with a non-default link, then
we should have a link address, and we definitely need
to insert it into the link hash table on insertion.
Split the API into with and without link creation and
if it has a link, insert the link into the link hash
table on sta_info_insert().
Fixes: ba6ddab94f ("wifi: mac80211: maintain link-sta hash table")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
247 lines
6.7 KiB
C
247 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* OCB mode implementation
|
|
*
|
|
* Copyright: (c) 2014 Czech Technical University in Prague
|
|
* (c) 2014 Volkswagen Group Research
|
|
* Copyright (C) 2022 Intel Corporation
|
|
* Author: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
|
|
* Funded by: Volkswagen Group Research
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <net/mac80211.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "ieee80211_i.h"
|
|
#include "driver-ops.h"
|
|
#include "rate.h"
|
|
|
|
#define IEEE80211_OCB_HOUSEKEEPING_INTERVAL (60 * HZ)
|
|
#define IEEE80211_OCB_PEER_INACTIVITY_LIMIT (240 * HZ)
|
|
#define IEEE80211_OCB_MAX_STA_ENTRIES 128
|
|
|
|
/**
|
|
* enum ocb_deferred_task_flags - mac80211 OCB deferred tasks
|
|
* @OCB_WORK_HOUSEKEEPING: run the periodic OCB housekeeping tasks
|
|
*
|
|
* These flags are used in @wrkq_flags field of &struct ieee80211_if_ocb
|
|
*/
|
|
enum ocb_deferred_task_flags {
|
|
OCB_WORK_HOUSEKEEPING,
|
|
};
|
|
|
|
void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *bssid, const u8 *addr,
|
|
u32 supp_rates)
|
|
{
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_supported_band *sband;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
struct sta_info *sta;
|
|
int band;
|
|
|
|
/* XXX: Consider removing the least recently used entry and
|
|
* allow new one to be added.
|
|
*/
|
|
if (local->num_sta >= IEEE80211_OCB_MAX_STA_ENTRIES) {
|
|
net_info_ratelimited("%s: No room for a new OCB STA entry %pM\n",
|
|
sdata->name, addr);
|
|
return;
|
|
}
|
|
|
|
ocb_dbg(sdata, "Adding new OCB station %pM\n", addr);
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
|
|
if (WARN_ON_ONCE(!chanctx_conf)) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
band = chanctx_conf->def.chan->band;
|
|
scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
|
|
rcu_read_unlock();
|
|
|
|
sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
|
|
if (!sta)
|
|
return;
|
|
|
|
/* Add only mandatory rates for now */
|
|
sband = local->hw.wiphy->bands[band];
|
|
sta->sta.deflink.supp_rates[band] =
|
|
ieee80211_mandatory_rates(sband, scan_width);
|
|
|
|
spin_lock(&ifocb->incomplete_lock);
|
|
list_add(&sta->list, &ifocb->incomplete_stations);
|
|
spin_unlock(&ifocb->incomplete_lock);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
static struct sta_info *ieee80211_ocb_finish_sta(struct sta_info *sta)
|
|
__acquires(RCU)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
u8 addr[ETH_ALEN];
|
|
|
|
memcpy(addr, sta->sta.addr, ETH_ALEN);
|
|
|
|
ocb_dbg(sdata, "Adding new IBSS station %pM (dev=%s)\n",
|
|
addr, sdata->name);
|
|
|
|
sta_info_move_state(sta, IEEE80211_STA_AUTH);
|
|
sta_info_move_state(sta, IEEE80211_STA_ASSOC);
|
|
sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
|
|
|
|
rate_control_rate_init(sta);
|
|
|
|
/* If it fails, maybe we raced another insertion? */
|
|
if (sta_info_insert_rcu(sta))
|
|
return sta_info_get(sdata, addr);
|
|
return sta;
|
|
}
|
|
|
|
static void ieee80211_ocb_housekeeping(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
|
|
ocb_dbg(sdata, "Running ocb housekeeping\n");
|
|
|
|
ieee80211_sta_expire(sdata, IEEE80211_OCB_PEER_INACTIVITY_LIMIT);
|
|
|
|
mod_timer(&ifocb->housekeeping_timer,
|
|
round_jiffies(jiffies + IEEE80211_OCB_HOUSEKEEPING_INTERVAL));
|
|
}
|
|
|
|
void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
struct sta_info *sta;
|
|
|
|
if (ifocb->joined != true)
|
|
return;
|
|
|
|
sdata_lock(sdata);
|
|
|
|
spin_lock_bh(&ifocb->incomplete_lock);
|
|
while (!list_empty(&ifocb->incomplete_stations)) {
|
|
sta = list_first_entry(&ifocb->incomplete_stations,
|
|
struct sta_info, list);
|
|
list_del(&sta->list);
|
|
spin_unlock_bh(&ifocb->incomplete_lock);
|
|
|
|
ieee80211_ocb_finish_sta(sta);
|
|
rcu_read_unlock();
|
|
spin_lock_bh(&ifocb->incomplete_lock);
|
|
}
|
|
spin_unlock_bh(&ifocb->incomplete_lock);
|
|
|
|
if (test_and_clear_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags))
|
|
ieee80211_ocb_housekeeping(sdata);
|
|
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
static void ieee80211_ocb_housekeeping_timer(struct timer_list *t)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
from_timer(sdata, t, u.ocb.housekeeping_timer);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
|
|
set_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags);
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
|
|
timer_setup(&ifocb->housekeeping_timer,
|
|
ieee80211_ocb_housekeeping_timer, 0);
|
|
INIT_LIST_HEAD(&ifocb->incomplete_stations);
|
|
spin_lock_init(&ifocb->incomplete_lock);
|
|
}
|
|
|
|
int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
|
|
struct ocb_setup *setup)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
u32 changed = BSS_CHANGED_OCB | BSS_CHANGED_BSSID;
|
|
int err;
|
|
|
|
if (ifocb->joined == true)
|
|
return -EINVAL;
|
|
|
|
sdata->deflink.operating_11g_mode = true;
|
|
sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
|
|
sdata->deflink.needed_rx_chains = sdata->local->rx_chains;
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
err = ieee80211_link_use_channel(&sdata->deflink, &setup->chandef,
|
|
IEEE80211_CHANCTX_SHARED);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
if (err)
|
|
return err;
|
|
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
ifocb->joined = true;
|
|
|
|
set_bit(OCB_WORK_HOUSEKEEPING, &ifocb->wrkq_flags);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
|
|
netif_carrier_on(sdata->dev);
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
|
|
ifocb->joined = false;
|
|
sta_info_flush(sdata);
|
|
|
|
spin_lock_bh(&ifocb->incomplete_lock);
|
|
while (!list_empty(&ifocb->incomplete_stations)) {
|
|
sta = list_first_entry(&ifocb->incomplete_stations,
|
|
struct sta_info, list);
|
|
list_del(&sta->list);
|
|
spin_unlock_bh(&ifocb->incomplete_lock);
|
|
|
|
sta_info_free(local, sta);
|
|
spin_lock_bh(&ifocb->incomplete_lock);
|
|
}
|
|
spin_unlock_bh(&ifocb->incomplete_lock);
|
|
|
|
netif_carrier_off(sdata->dev);
|
|
clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_OCB);
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_link_release_channel(&sdata->deflink);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
|
|
skb_queue_purge(&sdata->skb_queue);
|
|
|
|
del_timer_sync(&sdata->u.ocb.housekeeping_timer);
|
|
/* If the timer fired while we waited for it, it will have
|
|
* requeued the work. Now the work will be running again
|
|
* but will not rearm the timer again because it checks
|
|
* whether we are connected to the network or not -- at this
|
|
* point we shouldn't be anymore.
|
|
*/
|
|
|
|
return 0;
|
|
}
|