summaryrefslogtreecommitdiff
path: root/net/mac80211/ibss.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mac80211/ibss.c')
-rw-r--r--net/mac80211/ibss.c171
1 files changed, 86 insertions, 85 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index b2cc1fda6cfd..c691780725a7 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -43,6 +43,8 @@ static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
{
u16 auth_alg, auth_transaction, status_code;
+ lockdep_assert_held(&sdata->u.ibss.mtx);
+
if (len < 24 + 6)
return;
@@ -78,6 +80,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
u32 bss_change;
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+ lockdep_assert_held(&ifibss->mtx);
+
/* Reset own TSF to allow time synchronization work. */
drv_reset_tsf(local);
@@ -172,11 +176,13 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
rcu_assign_pointer(ifibss->presp, skb);
sdata->vif.bss_conf.beacon_int = beacon_int;
+ sdata->vif.bss_conf.basic_rates = basic_rates;
bss_change = BSS_CHANGED_BEACON_INT;
bss_change |= ieee80211_reset_erp_info(sdata);
bss_change |= BSS_CHANGED_BSSID;
bss_change |= BSS_CHANGED_BEACON;
bss_change |= BSS_CHANGED_BEACON_ENABLED;
+ bss_change |= BSS_CHANGED_BASIC_RATES;
bss_change |= BSS_CHANGED_IBSS;
sdata->vif.bss_conf.ibss_joined = true;
ieee80211_bss_info_change_notify(sdata, bss_change);
@@ -203,6 +209,8 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
int i, j;
u16 beacon_int = cbss->beacon_interval;
+ lockdep_assert_held(&sdata->u.ibss.mtx);
+
if (beacon_int < 10)
beacon_int = 10;
@@ -447,6 +455,8 @@ static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
int active = 0;
struct sta_info *sta;
+ lockdep_assert_held(&sdata->u.ibss.mtx);
+
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list) {
@@ -471,6 +481,8 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ lockdep_assert_held(&ifibss->mtx);
+
mod_timer(&ifibss->timer,
round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
@@ -503,6 +515,8 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
u16 capability;
int i;
+ lockdep_assert_held(&ifibss->mtx);
+
if (ifibss->fixed_bssid) {
memcpy(bssid, ifibss->bssid, ETH_ALEN);
} else {
@@ -529,7 +543,7 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
sdata->drop_unencrypted = 0;
__ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
- ifibss->channel, 3, /* first two are basic */
+ ifibss->channel, ifibss->basic_rates,
capability, 0);
}
@@ -547,6 +561,8 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
int active_ibss;
u16 capability;
+ lockdep_assert_held(&ifibss->mtx);
+
active_ibss = ieee80211_sta_active_ibss(sdata);
#ifdef CONFIG_MAC80211_IBSS_DEBUG
printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
@@ -635,6 +651,8 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *resp;
u8 *pos, *end;
+ lockdep_assert_held(&ifibss->mtx);
+
if (ifibss->state != IEEE80211_IBSS_MLME_JOINED ||
len < 24 + 2 || !ifibss->presp)
return;
@@ -727,8 +745,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
}
-static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
+void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb)
{
struct ieee80211_rx_status *rx_status;
struct ieee80211_mgmt *mgmt;
@@ -738,6 +756,8 @@ static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
mgmt = (struct ieee80211_mgmt *) skb->data;
fc = le16_to_cpu(mgmt->frame_control);
+ mutex_lock(&sdata->u.ibss.mtx);
+
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_PROBE_REQ:
ieee80211_rx_mgmt_probe_req(sdata, mgmt, skb->len);
@@ -755,35 +775,22 @@ static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
break;
}
- kfree_skb(skb);
+ mutex_unlock(&sdata->u.ibss.mtx);
}
-static void ieee80211_ibss_work(struct work_struct *work)
+void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_sub_if_data *sdata =
- container_of(work, struct ieee80211_sub_if_data, u.ibss.work);
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_ibss *ifibss;
- struct sk_buff *skb;
-
- if (WARN_ON(local->suspended))
- return;
-
- if (!ieee80211_sdata_running(sdata))
- return;
-
- if (local->scanning)
- return;
-
- if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_ADHOC))
- return;
- ifibss = &sdata->u.ibss;
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- while ((skb = skb_dequeue(&ifibss->skb_queue)))
- ieee80211_ibss_rx_queued_mgmt(sdata, skb);
+ mutex_lock(&ifibss->mtx);
- if (!test_and_clear_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request))
- return;
+ /*
+ * Work could be scheduled after scan or similar
+ * when we aren't even joined (or trying) with a
+ * network.
+ */
+ if (!ifibss->ssid_len)
+ goto out;
switch (ifibss->state) {
case IEEE80211_IBSS_MLME_SEARCH:
@@ -796,6 +803,9 @@ static void ieee80211_ibss_work(struct work_struct *work)
WARN_ON(1);
break;
}
+
+ out:
+ mutex_unlock(&ifibss->mtx);
}
static void ieee80211_ibss_timer(unsigned long data)
@@ -810,8 +820,7 @@ static void ieee80211_ibss_timer(unsigned long data)
return;
}
- set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request);
- ieee80211_queue_work(&local->hw, &ifibss->work);
+ ieee80211_queue_work(&local->hw, &sdata->work);
}
#ifdef CONFIG_PM
@@ -819,7 +828,6 @@ void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- cancel_work_sync(&ifibss->work);
if (del_timer_sync(&ifibss->timer))
ifibss->timer_running = true;
}
@@ -839,10 +847,9 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- INIT_WORK(&ifibss->work, ieee80211_ibss_work);
setup_timer(&ifibss->timer, ieee80211_ibss_timer,
(unsigned long) sdata);
- skb_queue_head_init(&ifibss->skb_queue);
+ mutex_init(&ifibss->mtx);
}
/* scan finished notification */
@@ -856,45 +863,28 @@ void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
continue;
if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
continue;
- if (!sdata->u.ibss.ssid_len)
- continue;
sdata->u.ibss.last_scan_completed = jiffies;
- mod_timer(&sdata->u.ibss.timer, 0);
+ ieee80211_queue_work(&local->hw, &sdata->work);
}
mutex_unlock(&local->iflist_mtx);
}
-ieee80211_rx_result
-ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
-{
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_mgmt *mgmt;
- u16 fc;
-
- if (skb->len < 24)
- return RX_DROP_MONITOR;
-
- mgmt = (struct ieee80211_mgmt *) skb->data;
- fc = le16_to_cpu(mgmt->frame_control);
-
- switch (fc & IEEE80211_FCTL_STYPE) {
- case IEEE80211_STYPE_PROBE_RESP:
- case IEEE80211_STYPE_BEACON:
- case IEEE80211_STYPE_PROBE_REQ:
- case IEEE80211_STYPE_AUTH:
- skb_queue_tail(&sdata->u.ibss.skb_queue, skb);
- ieee80211_queue_work(&local->hw, &sdata->u.ibss.work);
- return RX_QUEUED;
- }
-
- return RX_DROP_MONITOR;
-}
-
int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
struct cfg80211_ibss_params *params)
{
struct sk_buff *skb;
+ skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
+ 36 /* bitrates */ +
+ 34 /* SSID */ +
+ 3 /* DS params */ +
+ 4 /* IBSS params */ +
+ params->ie_len);
+ if (!skb)
+ return -ENOMEM;
+
+ mutex_lock(&sdata->u.ibss.mtx);
+
if (params->bssid) {
memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN);
sdata->u.ibss.fixed_bssid = true;
@@ -902,6 +892,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
sdata->u.ibss.fixed_bssid = false;
sdata->u.ibss.privacy = params->privacy;
+ sdata->u.ibss.basic_rates = params->basic_rates;
sdata->vif.bss_conf.beacon_int = params->beacon_interval;
@@ -922,34 +913,18 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
sdata->u.ibss.ie_len = params->ie_len;
}
- skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
- 36 /* bitrates */ +
- 34 /* SSID */ +
- 3 /* DS params */ +
- 4 /* IBSS params */ +
- params->ie_len);
- if (!skb)
- return -ENOMEM;
-
sdata->u.ibss.skb = skb;
sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
sdata->u.ibss.ibss_join_req = jiffies;
memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN);
-
- /*
- * The ssid_len setting below is used to see whether
- * we are active, and we need all other settings
- * before that may get visible.
- */
- mb();
-
sdata->u.ibss.ssid_len = params->ssid_len;
ieee80211_recalc_idle(sdata->local);
- set_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
- ieee80211_queue_work(&sdata->local->hw, &sdata->u.ibss.work);
+ ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+
+ mutex_unlock(&sdata->u.ibss.mtx);
return 0;
}
@@ -957,11 +932,33 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
{
struct sk_buff *skb;
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_local *local = sdata->local;
+ struct cfg80211_bss *cbss;
+ u16 capability;
+ int active_ibss;
- del_timer_sync(&sdata->u.ibss.timer);
- clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
- cancel_work_sync(&sdata->u.ibss.work);
- clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request);
+ mutex_lock(&sdata->u.ibss.mtx);
+
+ active_ibss = ieee80211_sta_active_ibss(sdata);
+
+ if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
+ capability = WLAN_CAPABILITY_IBSS;
+
+ if (ifibss->privacy)
+ capability |= WLAN_CAPABILITY_PRIVACY;
+
+ cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel,
+ ifibss->bssid, ifibss->ssid,
+ ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+ WLAN_CAPABILITY_PRIVACY,
+ capability);
+
+ if (cbss) {
+ cfg80211_unlink_bss(local->hw.wiphy, cbss);
+ cfg80211_put_bss(cbss);
+ }
+ }
sta_info_flush(sdata->local, sdata);
@@ -975,10 +972,14 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
synchronize_rcu();
kfree_skb(skb);
- skb_queue_purge(&sdata->u.ibss.skb_queue);
+ skb_queue_purge(&sdata->skb_queue);
memset(sdata->u.ibss.bssid, 0, ETH_ALEN);
sdata->u.ibss.ssid_len = 0;
+ del_timer_sync(&sdata->u.ibss.timer);
+
+ mutex_unlock(&sdata->u.ibss.mtx);
+
ieee80211_recalc_idle(sdata->local);
return 0;