struct_sta_ampdu_mlme(9) [centos man page]

STRUCT 
STA_AMPDU_MLM(9) 					     Internals						   STRUCT STA_AMPDU_MLM(9)

NAME

       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 <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   STRUCT STA_AMPDU_MLM(9)

STRUCT 
TID_AMPDU_RX(9)						     Internals						    STRUCT TID_AMPDU_RX(9)

NAME

       struct_tid_ampdu_rx - TID aggregation information (Rx).

SYNOPSIS

       struct tid_ampdu_rx {
	 struct rcu_head rcu_head;
	 spinlock_t reorder_lock;
	 struct sk_buff ** reorder_buf;
	 unsigned long * reorder_time;
	 struct timer_list session_timer;
	 struct timer_list reorder_timer;
	 unsigned long last_rx;
	 u16 head_seq_num;
	 u16 stored_mpdu_num;
	 u16 ssn;
	 u16 buf_size;
	 u16 timeout;
	 u8 dialog_token;
       };

MEMBERS

       rcu_head
	   RCU head used for freeing this struct

       reorder_lock
	   serializes access to reorder buffer, see below.

       reorder_buf
	   buffer to reorder incoming aggregated MPDUs

       reorder_time
	   jiffies when skb was added

       session_timer
	   check if peer keeps Tx-ing on the TID (by timeout value)

       reorder_timer
	   releases expired frames from the reorder buffer.

       last_rx
	   jiffies of last rx activity

       head_seq_num
	   head sequence number in reordering buffer.

       stored_mpdu_num
	   number of MPDUs in reordering buffer

       ssn
	   Starting Sequence Number expected to be aggregated.

       buf_size
	   buffer size for incoming A-MPDUs

       timeout
	   reset timer value (in TUs).

       dialog_token
	   dialog token for aggregation session

DESCRIPTION

       This structure's lifetime is managed by RCU, assignments to the array holding it must hold the aggregation mutex.

       The reorder_lock is used to protect the members of this struct, except for timeout, buf_size and dialog_token, which are constant across
       the lifetime of the struct (the dialog token being used only for debugging).

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    STRUCT TID_AMPDU_RX(9)