Commit 694c6186 authored by Johannes Berg's avatar Johannes Berg
Browse files

Merge remote-tracking branch 'mac80211/master' into HEAD

parents a49f0d1e 09b1426e
......@@ -1009,6 +1009,8 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
if (old_probe_resp)
kfree_rcu(old_probe_resp, rcu_head);
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
sta_info_flush(local, vlan);
sta_info_flush(local, sdata);
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
......
......@@ -4,6 +4,7 @@
#include <linux/nl80211.h>
#include <linux/export.h>
#include <linux/rtnetlink.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
......@@ -197,6 +198,15 @@ static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
ctx = container_of(conf, struct ieee80211_chanctx, conf);
if (sdata->vif.type == NL80211_IFTYPE_AP) {
struct ieee80211_sub_if_data *vlan;
/* for the VLAN list */
ASSERT_RTNL();
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
rcu_assign_pointer(vlan->vif.chanctx_conf, NULL);
}
ieee80211_unassign_vif_chanctx(sdata, ctx);
if (ctx->refcount == 0)
ieee80211_free_chanctx(local, ctx);
......@@ -316,6 +326,15 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
goto out;
}
if (sdata->vif.type == NL80211_IFTYPE_AP) {
struct ieee80211_sub_if_data *vlan;
/* for the VLAN list */
ASSERT_RTNL();
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
rcu_assign_pointer(vlan->vif.chanctx_conf, &ctx->conf);
}
ieee80211_recalc_smps_chanctx(local, ctx);
out:
mutex_unlock(&local->chanctx_mtx);
......@@ -331,6 +350,25 @@ void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
mutex_unlock(&sdata->local->chanctx_mtx);
}
void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *ap;
struct ieee80211_chanctx_conf *conf;
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss))
return;
ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
mutex_lock(&local->chanctx_mtx);
conf = rcu_dereference_protected(ap->vif.chanctx_conf,
lockdep_is_held(&local->chanctx_mtx));
rcu_assign_pointer(sdata->vif.chanctx_conf, conf);
mutex_unlock(&local->chanctx_mtx);
}
void ieee80211_iter_chan_contexts_atomic(
struct ieee80211_hw *hw,
void (*iter)(struct ieee80211_hw *hw,
......
......@@ -703,8 +703,8 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
sdata_info(sdata,
"No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
ieee80211_request_internal_scan(sdata,
ifibss->ssid, ifibss->ssid_len, NULL);
ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len,
NULL);
}
static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
......@@ -802,9 +802,8 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
IEEE80211_SCAN_INTERVAL)) {
sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
ieee80211_request_internal_scan(sdata,
ifibss->ssid, ifibss->ssid_len,
ifibss->fixed_channel ? ifibss->channel : NULL);
ieee80211_request_ibss_scan(sdata, ifibss->ssid,
ifibss->ssid_len, chan);
} else {
int interval = IEEE80211_SCAN_INTERVAL;
......
......@@ -92,8 +92,6 @@ struct ieee80211_bss {
u32 device_ts;
u8 dtim_period;
bool wmm_used;
bool uapsd_supported;
......@@ -140,7 +138,6 @@ enum ieee80211_bss_corrupt_data_flags {
/**
* enum ieee80211_valid_data_flags - BSS valid data flags
* @IEEE80211_BSS_VALID_DTIM: DTIM data was gathered from non-corrupt IE
* @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
* @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
* @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
......@@ -151,7 +148,6 @@ enum ieee80211_bss_corrupt_data_flags {
* beacon/probe response.
*/
enum ieee80211_bss_valid_data_flags {
IEEE80211_BSS_VALID_DTIM = BIT(0),
IEEE80211_BSS_VALID_WMM = BIT(1),
IEEE80211_BSS_VALID_RATES = BIT(2),
IEEE80211_BSS_VALID_ERP = BIT(3)
......@@ -440,6 +436,7 @@ struct ieee80211_if_managed {
unsigned long timers_running; /* used for quiesce/restart */
bool powersave; /* powersave requested for this iface */
bool broken_ap; /* AP is broken -- turn off powersave */
u8 dtim_period;
enum ieee80211_smps_mode req_smps, /* requested smps mode */
driver_smps_mode; /* smps mode request */
......@@ -773,6 +770,10 @@ struct ieee80211_sub_if_data {
u32 mntr_flags;
} u;
spinlock_t cleanup_stations_lock;
struct list_head cleanup_stations;
struct work_struct cleanup_stations_wk;
#ifdef CONFIG_MAC80211_DEBUGFS
struct {
struct dentry *dir;
......@@ -1329,9 +1330,9 @@ void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
/* scan/BSS handling */
void ieee80211_scan_work(struct work_struct *work);
int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan);
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan);
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
struct cfg80211_scan_request *req);
void ieee80211_scan_cancel(struct ieee80211_local *local);
......@@ -1628,6 +1629,7 @@ ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
enum ieee80211_chanctx_mode mode);
void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
struct ieee80211_chanctx *chanctx);
......
......@@ -207,17 +207,8 @@ void ieee80211_recalc_idle(struct ieee80211_local *local)
static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
{
int meshhdrlen;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
/* FIX: what would be proper limits for MTU?
* This interface uses 802.3 frames. */
if (new_mtu < 256 ||
new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
return -EINVAL;
}
dev->mtu = new_mtu;
return 0;
......@@ -586,11 +577,13 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP_VLAN:
/* no need to tell driver, but set carrier */
if (rtnl_dereference(sdata->bss->beacon))
/* no need to tell driver, but set carrier and chanctx */
if (rtnl_dereference(sdata->bss->beacon)) {
ieee80211_vif_vlan_copy_chanctx(sdata);
netif_carrier_on(dev);
else
} else {
netif_carrier_off(dev);
}
break;
case NL80211_IFTYPE_MONITOR:
if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
......@@ -839,6 +832,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP_VLAN:
list_del(&sdata->u.vlan.list);
rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
/* no need to tell driver */
break;
case NL80211_IFTYPE_MONITOR:
......@@ -865,20 +859,11 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
cancel_work_sync(&sdata->work);
/*
* When we get here, the interface is marked down.
* Call rcu_barrier() to wait both for the RX path
* Call synchronize_rcu() to wait for the RX path
* should it be using the interface and enqueuing
* frames at this very time on another CPU, and
* for the sta free call_rcu callbacks.
*/
rcu_barrier();
/*
* free_sta_rcu() enqueues a work for the actual
* sta cleanup, so we need to flush it while
* sdata is still valid.
* frames at this very time on another CPU.
*/
flush_workqueue(local->workqueue);
synchronize_rcu();
skb_queue_purge(&sdata->skb_queue);
/*
......@@ -1498,6 +1483,15 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
mutex_unlock(&local->iflist_mtx);
}
static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
{
struct ieee80211_sub_if_data *sdata;
sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
ieee80211_cleanup_sdata_stas(sdata);
}
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
struct wireless_dev **new_wdev, enum nl80211_iftype type,
struct vif_params *params)
......@@ -1573,6 +1567,10 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
INIT_LIST_HEAD(&sdata->key_list);
spin_lock_init(&sdata->cleanup_stations_lock);
INIT_LIST_HEAD(&sdata->cleanup_stations);
INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[i];
......
......@@ -163,7 +163,7 @@ int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
return -ENOMEM;
sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
for (i = 0; i < RMC_BUCKETS; i++)
INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list);
INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
return 0;
}
......@@ -177,7 +177,7 @@ void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
return;
for (i = 0; i < RMC_BUCKETS; i++)
list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) {
list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
list_del(&p->list);
kmem_cache_free(rm_cache, p);
}
......@@ -210,7 +210,7 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
/* Don't care about endianness since only match matters */
memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) {
list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
++entries;
if (time_after(jiffies, p->exp_time) ||
(entries == RMC_QUEUE_MAX_LEN)) {
......@@ -229,7 +229,7 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
p->seqnum = seqnum;
p->exp_time = jiffies + RMC_TIMEOUT;
memcpy(p->sa, sa, ETH_ALEN);
list_add(&p->list, &rmc->bucket[idx].list);
list_add(&p->list, &rmc->bucket[idx]);
return 0;
}
......
......@@ -184,7 +184,7 @@ struct rmc_entry {
};
struct mesh_rmc {
struct rmc_entry bucket[RMC_BUCKETS];
struct list_head bucket[RMC_BUCKETS];
u32 idx_mask;
};
......
......@@ -1074,12 +1074,8 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
if (beaconint_us > latency) {
local->ps_sdata = NULL;
} else {
struct ieee80211_bss *bss;
int maxslp = 1;
u8 dtimper;
bss = (void *)found->u.mgd.associated->priv;
dtimper = bss->dtim_period;
u8 dtimper = found->u.mgd.dtim_period;
/* If the TIM IE is invalid, pretend the value is 1 */
if (!dtimper)
......@@ -1410,10 +1406,17 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ieee80211_led_assoc(local, 1);
if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
bss_conf->dtim_period = bss->dtim_period;
else
if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
/*
* If the AP is buggy we may get here with no DTIM period
* known, so assume it's 1 which is the only safe assumption
* in that case, although if the TIM IE is broken powersave
* probably just won't work at all.
*/
bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
} else {
bss_conf->dtim_period = 0;
}
bss_conf->assoc = 1;
......@@ -1562,6 +1565,8 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
sdata->u.mgd.timers_running = 0;
sdata->vif.bss_conf.dtim_period = 0;
ifmgd->flags = 0;
ieee80211_vif_release_channel(sdata);
}
......@@ -2373,11 +2378,18 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
struct ieee80211_channel *channel;
bool need_ps = false;
if (sdata->u.mgd.associated &&
ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
bss = (void *)sdata->u.mgd.associated->priv;
if ((sdata->u.mgd.associated &&
ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
(sdata->u.mgd.assoc_data &&
ether_addr_equal(mgmt->bssid,
sdata->u.mgd.assoc_data->bss->bssid))) {
/* not previously set so we may need to recalc */
need_ps = !bss->dtim_period;
need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
if (elems->tim && !elems->parse_error) {
struct ieee80211_tim_ie *tim_ie = elems->tim;
sdata->u.mgd.dtim_period = tim_ie->dtim_period;
}
}
if (elems->ds_params && elems->ds_params_len == 1)
......@@ -3896,20 +3908,41 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
/* kick off associate process */
ifmgd->assoc_data = assoc_data;
ifmgd->dtim_period = 0;
err = ieee80211_prep_connection(sdata, req->bss, true);
if (err)
goto err_clear;
if (!bss->dtim_period &&
sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
/*
* Wait up to one beacon interval ...
* should this be more if we miss one?
*/
sdata_info(sdata, "waiting for beacon from %pM\n",
ifmgd->bssid);
assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
const struct cfg80211_bss_ies *beacon_ies;
rcu_read_lock();
beacon_ies = rcu_dereference(req->bss->beacon_ies);
if (!beacon_ies) {
/*
* Wait up to one beacon interval ...
* should this be more if we miss one?
*/
sdata_info(sdata, "waiting for beacon from %pM\n",
ifmgd->bssid);
assoc_data->timeout =
TU_TO_EXP_TIME(req->bss->beacon_interval);
} else {
const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
beacon_ies->data,
beacon_ies->len);
if (tim_ie && tim_ie[1] >=
sizeof(struct ieee80211_tim_ie)) {
const struct ieee80211_tim_ie *tim;
tim = (void *)(tim_ie + 2);
ifmgd->dtim_period = tim->dtim_period;
}
assoc_data->have_beacon = true;
assoc_data->sent_assoc = false;
assoc_data->timeout = jiffies;
}
rcu_read_unlock();
} else {
assoc_data->have_beacon = true;
assoc_data->sent_assoc = false;
......
......@@ -113,18 +113,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
bss->valid_data |= IEEE80211_BSS_VALID_ERP;
}
if (elems->tim && (!elems->parse_error ||
!(bss->valid_data & IEEE80211_BSS_VALID_DTIM))) {
struct ieee80211_tim_ie *tim_ie = elems->tim;
bss->dtim_period = tim_ie->dtim_period;
if (!elems->parse_error)
bss->valid_data |= IEEE80211_BSS_VALID_DTIM;
}
/* If the beacon had no TIM IE, or it was invalid, use 1 */
if (beacon && !bss->dtim_period)
bss->dtim_period = 1;
/* replace old supported rates if we get new values */
if (!elems->parse_error ||
!(bss->valid_data & IEEE80211_BSS_VALID_RATES)) {
......@@ -832,9 +820,9 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
return res;
}
int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan)
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan)
{
struct ieee80211_local *local = sdata->local;
int ret = -EBUSY;
......@@ -848,22 +836,36 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
/* fill internal scan request */
if (!chan) {
int i, nchan = 0;
int i, max_n;
int n_ch = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (!local->hw.wiphy->bands[band])
continue;
for (i = 0;
i < local->hw.wiphy->bands[band]->n_channels;
i++) {
local->int_scan_req->channels[nchan] =
max_n = local->hw.wiphy->bands[band]->n_channels;
for (i = 0; i < max_n; i++) {
struct ieee80211_channel *tmp_ch =
&local->hw.wiphy->bands[band]->channels[i];
nchan++;
if (tmp_ch->flags & (IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_DISABLED))
continue;
local->int_scan_req->channels[n_ch] = tmp_ch;
n_ch++;
}
}
local->int_scan_req->n_channels = nchan;
if (WARN_ON_ONCE(n_ch == 0))
goto unlock;
local->int_scan_req->n_channels = n_ch;
} else {
if (WARN_ON_ONCE(chan->flags & (IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_DISABLED)))
goto unlock;
local->int_scan_req->channels[0] = chan;
local->int_scan_req->n_channels = 1;
}
......
......@@ -91,9 +91,8 @@ static int sta_info_hash_del(struct ieee80211_local *local,
return -ENOENT;
}
static void free_sta_work(struct work_struct *wk)
static void cleanup_single_sta(struct sta_info *sta)
{
struct sta_info *sta = container_of(wk, struct sta_info, free_sta_wk);
int ac, i;
struct tid_ampdu_tx *tid_tx;
struct ieee80211_sub_if_data *sdata = sta->sdata;
......@@ -153,11 +152,35 @@ static void free_sta_work(struct work_struct *wk)
sta_info_free(local, sta);
}
void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata)
{
struct sta_info *sta;
spin_lock_bh(&sdata->cleanup_stations_lock);
while (!list_empty(&sdata->cleanup_stations)) {
sta = list_first_entry(&sdata->cleanup_stations,
struct sta_info, list);
list_del(&sta->list);
spin_unlock_bh(&sdata->cleanup_stations_lock);
cleanup_single_sta(sta);
spin_lock_bh(&sdata->cleanup_stations_lock);
}
spin_unlock_bh(&sdata->cleanup_stations_lock);
}
static void free_sta_rcu(struct rcu_head *h)
{
struct sta_info *sta = container_of(h, struct sta_info, rcu_head);
struct ieee80211_sub_if_data *sdata = sta->sdata;
ieee80211_queue_work(&sta->local->hw, &sta->free_sta_wk);
spin_lock(&sdata->cleanup_stations_lock);
list_add_tail(&sta->list, &sdata->cleanup_stations);
spin_unlock(&sdata->cleanup_stations_lock);
ieee80211_queue_work(&sdata->local->hw, &sdata->cleanup_stations_wk);
}
/* protected by RCU */
......@@ -310,7 +333,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
spin_lock_init(&sta->lock);
INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
INIT_WORK(&sta->free_sta_wk, free_sta_work);
INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
mutex_init(&sta->ampdu_mlme.mtx);
......@@ -862,7 +884,7 @@ void sta_info_init(struct ieee80211_local *local)
void sta_info_stop(struct ieee80211_local *local)
{
del_timer(&local->sta_cleanup);
del_timer_sync(&local->sta_cleanup);
sta_info_flush(local, NULL);
}
......@@ -891,6 +913,20 @@ int sta_info_flush(struct ieee80211_local *local,
}
mutex_unlock(&local->sta_mtx);
rcu_barrier();
if (sdata) {
ieee80211_cleanup_sdata_stas(sdata);
cancel_work_sync(&sdata->cleanup_stations_wk);
} else {
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
ieee80211_cleanup_sdata_stas(sdata);
cancel_work_sync(&sdata->cleanup_stations_wk);
}
mutex_unlock(&local->iflist_mtx);
}
return ret;
}
......
......@@ -299,7 +299,6 @@ struct sta_info {
spinlock_t lock;
struct work_struct drv_unblock_wk;
struct work_struct free_sta_wk;
u16 listen_interval;
......@@ -563,4 +562,6 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata);
#endif /* STA_INFO_H */
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