From 62bb2ac5cb6c2f813e151617525ec518e2d1c649 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 17 Feb 2010 21:27:26 +0100 Subject: mac80211: deprecate RX status noise The noise value as is won't be used, isn't filled by most drivers and doesn't really make a whole lot of sense on a per packet basis -- proper cfg80211 survey support in mac80211 will need to be different. Mark the struct member as deprecated so it will be removed from drivers. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/sta_info.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'net/mac80211/sta_info.h') diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 822d84522937..2b635909de5c 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -200,7 +200,6 @@ struct sta_ampdu_mlme { * @rx_fragments: number of received MPDUs * @rx_dropped: number of dropped MPDUs from this STA * @last_signal: signal of last received frame from this STA - * @last_noise: noise of last received frame from this STA * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) * @tx_filtered_count: number of frames the hardware filtered for this STA * @tx_retry_failed: number of frames that failed retry @@ -267,7 +266,6 @@ struct sta_info { unsigned long rx_fragments; unsigned long rx_dropped; int last_signal; - int last_noise; __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES]; /* Updated from TX status path only, no locking requirements */ -- cgit v1.2.3 From 618f356b95e37ca0c30b3b513898fda54abd52a6 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 6 Apr 2010 11:18:46 +0200 Subject: mac80211: rename WLAN_STA_SUSPEND to WLAN_STA_BLOCK_BA I want to use it during station destruction as well so rename it to WLAN_STA_BLOCK_BA which is also the only use of it now. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/agg-rx.c | 2 +- net/mac80211/agg-tx.c | 2 +- net/mac80211/pm.c | 2 +- net/mac80211/sta_info.h | 6 +++--- net/mac80211/util.c | 2 +- 5 files changed, 7 insertions(+), 7 deletions(-) (limited to 'net/mac80211/sta_info.h') diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index cb9f80a94002..7d87f446f030 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -173,7 +173,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, status = WLAN_STATUS_REQUEST_DECLINED; - if (test_sta_flags(sta, WLAN_STA_SUSPEND)) { + if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Suspend in progress. " "Denying ADDBA request\n"); diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index bb4ac70fc97a..32d2148b5b98 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -245,7 +245,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) return -EINVAL; } - if (test_sta_flags(sta, WLAN_STA_SUSPEND)) { + if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Suspend in progress. " "Denying BA session request\n"); diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 0e64484e861c..75202b295a4e 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -46,7 +46,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw) if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { list_for_each_entry_rcu(sta, &local->sta_list, list) { - set_sta_flags(sta, WLAN_STA_SUSPEND); + set_sta_flags(sta, WLAN_STA_BLOCK_BA); ieee80211_sta_tear_down_BA_sessions(sta); } } diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 2b635909de5c..57e81758d6f7 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -35,8 +35,8 @@ * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next * frame to this station is transmitted. * @WLAN_STA_MFP: Management frame protection is used with this STA. - * @WLAN_STA_SUSPEND: Set/cleared during a suspend/resume cycle. - * Used to deny ADDBA requests (both TX and RX). + * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) + * during suspend/resume. * @WLAN_STA_PS_DRIVER: driver requires keeping this station in * power-save mode logically to flush frames that might still * be in the queues @@ -57,7 +57,7 @@ enum ieee80211_sta_info_flags { WLAN_STA_WDS = 1<<7, WLAN_STA_CLEAR_PS_FILT = 1<<9, WLAN_STA_MFP = 1<<10, - WLAN_STA_SUSPEND = 1<<11, + WLAN_STA_BLOCK_BA = 1<<11, WLAN_STA_PS_DRIVER = 1<<12, WLAN_STA_PSPOLL = 1<<13, WLAN_STA_DISASSOC = 1<<14, diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 7b2c170af71c..7614821caed5 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1140,7 +1140,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { list_for_each_entry_rcu(sta, &local->sta_list, list) { - clear_sta_flags(sta, WLAN_STA_SUSPEND); + clear_sta_flags(sta, WLAN_STA_BLOCK_BA); } } -- cgit v1.2.3 From 098a607091426e79178b9a6c318d993fea131791 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 6 Apr 2010 11:18:47 +0200 Subject: mac80211: clean up/fix aggregation code The aggregation code has a number of quirks, like inventing an unneeded WLAN_BACK_TIMER value and leaking memory under certain circumstances during station destruction. Fix these issues by using the regular aggregation session teardown code and blocking new aggregation sessions, all before the station is really destructed. As a side effect, this gets rid of the long code block to destroy aggregation safely. Additionally, rename tid_state_rx which can only have the values IDLE and OPERATIONAL to tid_active_rx to make it easier to understand that there is no bitwise stuff going on on the RX side -- the TX side remains because it needs to keep track of the driver and peer states. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/linux/ieee80211.h | 1 - net/mac80211/agg-rx.c | 48 +++++++++++++++++--------------------- net/mac80211/debugfs_sta.c | 10 ++++---- net/mac80211/rx.c | 5 ++-- net/mac80211/sta_info.c | 58 ++++++++-------------------------------------- net/mac80211/sta_info.h | 6 ++--- 6 files changed, 40 insertions(+), 88 deletions(-) (limited to 'net/mac80211/sta_info.h') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 19984958ab7b..e9e03b02cb08 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -1324,7 +1324,6 @@ enum ieee80211_back_actioncode { enum ieee80211_back_parties { WLAN_BACK_RECIPIENT = 0, WLAN_BACK_INITIATOR = 1, - WLAN_BACK_TIMER = 2, }; /* SA Query action */ diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 7d87f446f030..53233ab50f65 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -22,19 +22,20 @@ void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, u16 initiator, u16 reason) { struct ieee80211_local *local = sta->local; + struct tid_ampdu_rx *tid_rx; int i; - /* check if TID is in operational state */ spin_lock_bh(&sta->lock); - if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) { + + /* check if TID is in operational state */ + if (!sta->ampdu_mlme.tid_active_rx[tid]) { spin_unlock_bh(&sta->lock); return; } - sta->ampdu_mlme.tid_state_rx[tid] = - HT_AGG_STATE_REQ_STOP_BA_MSK | - (initiator << HT_AGG_STATE_INITIATOR_SHIFT); - spin_unlock_bh(&sta->lock); + sta->ampdu_mlme.tid_active_rx[tid] = false; + + tid_rx = sta->ampdu_mlme.tid_rx[tid]; #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Rx BA session stop requested for %pM tid %u\n", @@ -46,37 +47,30 @@ void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, printk(KERN_DEBUG "HW problem - can not stop rx " "aggregation for tid %d\n", tid); - /* shutdown timer has not expired */ - if (initiator != WLAN_BACK_TIMER) - del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); - /* check if this is a self generated aggregation halt */ - if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) + if (initiator == WLAN_BACK_RECIPIENT) ieee80211_send_delba(sta->sdata, sta->sta.addr, tid, 0, reason); /* free the reordering buffer */ - for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { - if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { + for (i = 0; i < tid_rx->buf_size; i++) { + if (tid_rx->reorder_buf[i]) { /* release the reordered frames */ - dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); - sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; - sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; + dev_kfree_skb(tid_rx->reorder_buf[i]); + tid_rx->stored_mpdu_num--; + tid_rx->reorder_buf[i] = NULL; } } - spin_lock_bh(&sta->lock); /* free resources */ - kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); - kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_time); - - if (!sta->ampdu_mlme.tid_rx[tid]->shutdown) { - kfree(sta->ampdu_mlme.tid_rx[tid]); - sta->ampdu_mlme.tid_rx[tid] = NULL; - } + kfree(tid_rx->reorder_buf); + kfree(tid_rx->reorder_time); + sta->ampdu_mlme.tid_rx[tid] = NULL; - sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; spin_unlock_bh(&sta->lock); + + del_timer_sync(&tid_rx->session_timer); + kfree(tid_rx); } /* @@ -211,7 +205,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, /* examine state machine */ spin_lock_bh(&sta->lock); - if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { + if (sta->ampdu_mlme.tid_active_rx[tid]) { #ifdef CONFIG_MAC80211_HT_DEBUG if (net_ratelimit()) printk(KERN_DEBUG "unexpected AddBA Req from " @@ -273,7 +267,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, } /* change state and send addba resp */ - sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; + sta->ampdu_mlme.tid_active_rx[tid] = true; tid_agg_rx->dialog_token = dialog_token; tid_agg_rx->ssn = start_seq_num; tid_agg_rx->head_seq_num = start_seq_num; diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c index 23e720034577..740ff6c5b92c 100644 --- a/net/mac80211/debugfs_sta.c +++ b/net/mac80211/debugfs_sta.c @@ -119,7 +119,7 @@ STA_OPS(last_seq_ctrl); static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { - char buf[64 + STA_TID_NUM * 40], *p = buf; + char buf[71 + STA_TID_NUM * 40], *p = buf; int i; struct sta_info *sta = file->private_data; @@ -127,16 +127,16 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", sta->ampdu_mlme.dialog_token_allocator + 1); p += scnprintf(p, sizeof(buf) + buf - p, - "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tSSN\tpending\n"); + "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tSSN\tpending\n"); for (i = 0; i < STA_TID_NUM; i++) { p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", - sta->ampdu_mlme.tid_state_rx[i]); + sta->ampdu_mlme.tid_active_rx[i]); p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", - sta->ampdu_mlme.tid_state_rx[i] ? + sta->ampdu_mlme.tid_active_rx[i] ? sta->ampdu_mlme.tid_rx[i]->dialog_token : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", - sta->ampdu_mlme.tid_state_rx[i] ? + sta->ampdu_mlme.tid_active_rx[i] ? sta->ampdu_mlme.tid_rx[i]->ssn : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index c02e43b50ac3..62053fa711f3 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -720,7 +720,7 @@ static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; - if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) + if (!sta->ampdu_mlme.tid_active_rx[tid]) goto dont_reorder; tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; @@ -1805,8 +1805,7 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) if (!rx->sta) return RX_DROP_MONITOR; tid = le16_to_cpu(bar->control) >> 12; - if (rx->sta->ampdu_mlme.tid_state_rx[tid] - != HT_AGG_STATE_OPERATIONAL) + if (!rx->sta->ampdu_mlme.tid_active_rx[tid]) return RX_DROP_MONITOR; tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid]; diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index bd11753c1525..5bf044b92dca 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -238,9 +238,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, * enable session_timer's data differentiation. refer to * sta_rx_agg_session_timer_expired for useage */ sta->timer_to_tid[i] = i; - /* rx */ - sta->ampdu_mlme.tid_state_rx[i] = HT_AGG_STATE_IDLE; - sta->ampdu_mlme.tid_rx[i] = NULL; /* tx */ sta->ampdu_mlme.tid_state_tx[i] = HT_AGG_STATE_IDLE; sta->ampdu_mlme.tid_tx[i] = NULL; @@ -606,7 +603,7 @@ static int __must_check __sta_info_destroy(struct sta_info *sta) struct ieee80211_sub_if_data *sdata; struct sk_buff *skb; unsigned long flags; - int ret, i; + int ret; might_sleep(); @@ -616,6 +613,15 @@ static int __must_check __sta_info_destroy(struct sta_info *sta) local = sta->local; sdata = sta->sdata; + /* + * Before removing the station from the driver and + * rate control, it might still start new aggregation + * sessions -- block that to make sure the tear-down + * will be sufficient. + */ + set_sta_flags(sta, WLAN_STA_BLOCK_BA); + ieee80211_sta_tear_down_BA_sessions(sta); + spin_lock_irqsave(&local->sta_lock, flags); ret = sta_info_hash_del(local, sta); /* this might still be the pending list ... which is fine */ @@ -700,50 +706,6 @@ static int __must_check __sta_info_destroy(struct sta_info *sta) while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) dev_kfree_skb_any(skb); - for (i = 0; i < STA_TID_NUM; i++) { - struct tid_ampdu_rx *tid_rx; - struct tid_ampdu_tx *tid_tx; - - spin_lock_bh(&sta->lock); - tid_rx = sta->ampdu_mlme.tid_rx[i]; - /* Make sure timer won't free the tid_rx struct, see below */ - if (tid_rx) - tid_rx->shutdown = true; - - spin_unlock_bh(&sta->lock); - - /* - * Outside spinlock - shutdown is true now so that the timer - * won't free tid_rx, we have to do that now. Can't let the - * timer do it because we have to sync the timer outside the - * lock that it takes itself. - */ - if (tid_rx) { - del_timer_sync(&tid_rx->session_timer); - kfree(tid_rx); - } - - /* - * No need to do such complications for TX agg sessions, the - * path leading to freeing the tid_tx struct goes via a call - * from the driver, and thus needs to look up the sta struct - * again, which cannot be found when we get here. Hence, we - * just need to delete the timer and free the aggregation - * info; we won't be telling the peer about it then but that - * doesn't matter if we're not talking to it again anyway. - */ - tid_tx = sta->ampdu_mlme.tid_tx[i]; - if (tid_tx) { - del_timer_sync(&tid_tx->addba_resp_timer); - /* - * STA removed while aggregation session being - * started? Bit odd, but purge frames anyway. - */ - skb_queue_purge(&tid_tx->pending); - kfree(tid_tx); - } - } - __sta_info_free(local, sta); return 0; diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 57e81758d6f7..48a5e80957f0 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -36,7 +36,7 @@ * frame to this station is transmitted. * @WLAN_STA_MFP: Management frame protection is used with this STA. * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) - * during suspend/resume. + * during suspend/resume and station removal. * @WLAN_STA_PS_DRIVER: driver requires keeping this station in * power-save mode logically to flush frames that might still * be in the queues @@ -106,7 +106,6 @@ struct tid_ampdu_tx { * @buf_size: buffer size for incoming A-MPDUs * @timeout: reset timer value (in TUs). * @dialog_token: dialog token for aggregation session - * @shutdown: this session is being shut down due to STA removal */ struct tid_ampdu_rx { struct sk_buff **reorder_buf; @@ -118,7 +117,6 @@ struct tid_ampdu_rx { u16 buf_size; u16 timeout; u8 dialog_token; - bool shutdown; }; /** @@ -156,7 +154,7 @@ enum plink_state { */ struct sta_ampdu_mlme { /* rx */ - u8 tid_state_rx[STA_TID_NUM]; + bool tid_active_rx[STA_TID_NUM]; struct tid_ampdu_rx *tid_rx[STA_TID_NUM]; /* tx */ u8 tid_state_tx[STA_TID_NUM]; -- cgit v1.2.3