diff options
| -rw-r--r-- | net/mac80211/ibss.c | 97 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 7 |
2 files changed, 54 insertions, 50 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 090e344..c691780 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); @@ -205,6 +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; @@ -449,6 +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) { @@ -473,6 +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)); @@ -505,6 +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 { @@ -549,6 +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", @@ -637,6 +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; @@ -740,6 +756,8 @@ 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); @@ -756,14 +774,23 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); break; } + + mutex_unlock(&sdata->u.ibss.mtx); } void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; - if (!test_and_clear_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request)) - return; + mutex_lock(&ifibss->mtx); + + /* + * 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: @@ -776,15 +803,9 @@ void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) WARN_ON(1); break; } -} -static void ieee80211_queue_ibss_work(struct ieee80211_sub_if_data *sdata) -{ - struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; - struct ieee80211_local *local = sdata->local; - - set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request); - ieee80211_queue_work(&local->hw, &sdata->work); + out: + mutex_unlock(&ifibss->mtx); } static void ieee80211_ibss_timer(unsigned long data) @@ -799,7 +820,7 @@ static void ieee80211_ibss_timer(unsigned long data) return; } - ieee80211_queue_ibss_work(sdata); + ieee80211_queue_work(&local->hw, &sdata->work); } #ifdef CONFIG_PM @@ -828,6 +849,7 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) setup_timer(&ifibss->timer, ieee80211_ibss_timer, (unsigned long) sdata); + mutex_init(&ifibss->mtx); } /* scan finished notification */ @@ -841,10 +863,8 @@ 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; - ieee80211_queue_ibss_work(sdata); + ieee80211_queue_work(&local->hw, &sdata->work); } mutex_unlock(&local->iflist_mtx); } @@ -854,6 +874,17 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, { 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; @@ -882,35 +913,19 @@ 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->work); + mutex_unlock(&sdata->u.ibss.mtx); + return 0; } @@ -921,7 +936,9 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) struct ieee80211_local *local = sdata->local; struct cfg80211_bss *cbss; u16 capability; - int active_ibss = 0; + int active_ibss; + + mutex_lock(&sdata->u.ibss.mtx); active_ibss = ieee80211_sta_active_ibss(sdata); @@ -959,19 +976,9 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) memset(sdata->u.ibss.bssid, 0, ETH_ALEN); sdata->u.ibss.ssid_len = 0; - /* - * ssid_len indicates active or not, so needs to be visible to - * everybody, especially ieee80211_ibss_notify_scan_completed, - * so it won't restart the timer after we remove it here. - */ - mb(); - del_timer_sync(&sdata->u.ibss.timer); - clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); - /* - * Since the REQ_RUN bit is clear, the work won't do - * anything if it runs after this. - */ + + mutex_unlock(&sdata->u.ibss.mtx); ieee80211_recalc_idle(sdata->local); diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index f9251d5..c6b5c2d 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -377,14 +377,11 @@ struct ieee80211_if_managed { int last_cqm_event_signal; }; -enum ieee80211_ibss_request { - IEEE80211_IBSS_REQ_RUN = 0, -}; - struct ieee80211_if_ibss { struct timer_list timer; - unsigned long request; + struct mutex mtx; + unsigned long last_scan_completed; u32 basic_rates; |