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struct_sta_ampdu_mlme(9) [centos man page]

struct_sta_ampdu_mlme - STA aggregation information. SYNOPSIS
struct sta_ampdu_mlme { struct mutex mtx; struct tid_ampdu_rx __rcu * tid_rx[IEEE80211_NUM_TIDS]; unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; struct work_struct work; struct tid_ampdu_tx __rcu * tid_tx[IEEE80211_NUM_TIDS]; struct tid_ampdu_tx * tid_start_tx[IEEE80211_NUM_TIDS]; unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; u8 addba_req_num[IEEE80211_NUM_TIDS]; u8 dialog_token_allocator; }; MEMBERS
mtx mutex to protect all TX data (except non-NULL assignments to tid_tx[idx], which are protected by the sta spinlock) tid_rx[IEEE80211_NUM_TIDS] aggregation info for Rx per TID -- RCU protected tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)] bitmap indicating on which TIDs the RX timer expired until the work for it runs tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)] bitmap indicating which BA sessions per TID the driver requested to close until the work for it runs work work struct for starting/stopping aggregation tid_tx[IEEE80211_NUM_TIDS] aggregation info for Tx per TID tid_start_tx[IEEE80211_NUM_TIDS] sessions where start was requested last_addba_req_time[IEEE80211_NUM_TIDS] timestamp of the last addBA request. addba_req_num[IEEE80211_NUM_TIDS] number of times addBA request has been sent. dialog_token_allocator dialog token enumerator for each new session; AUTHOR
Johannes Berg <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT STA_AMPDU_MLM(9)

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struct_tid_ampdu_tx - TID aggregation information (Tx). SYNOPSIS
struct tid_ampdu_tx { struct rcu_head rcu_head; struct timer_list session_timer; struct timer_list addba_resp_timer; struct sk_buff_head pending; unsigned long state; unsigned long last_tx; u16 timeout; u8 dialog_token; u8 stop_initiator; bool tx_stop; u8 buf_size; u16 failed_bar_ssn; bool bar_pending; }; MEMBERS
rcu_head rcu head for freeing structure session_timer check if we keep Tx-ing on the TID (by timeout value) addba_resp_timer timer for peer's response to addba request pending pending frames queue -- use sta's spinlock to protect state session state (see above) last_tx jiffies of last tx activity timeout session timeout value to be filled in ADDBA requests dialog_token dialog token for aggregation session stop_initiator initiator of a session stop tx_stop TX DelBA frame when stopping buf_size reorder buffer size at receiver failed_bar_ssn ssn of the last failed BAR tx attempt bar_pending BAR needs to be re-sent DESCRIPTION
This structure's lifetime is managed by RCU, assignments to the array holding it must hold the aggregation mutex. The TX path can access it under RCU lock-free if, and only if, the state has the flag HT_AGG_STATE_OPERATIONAL set. Otherwise, the TX path must also acquire the spinlock and re-check the state, see comments in the tx code touching it. AUTHOR
Johannes Berg <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT TID_AMPDU_TX(9)
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