'\" t
.\"     Title: struct tid_ampdu_tx
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Internals
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "STRUCT TID_AMPDU_TX" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Internals"
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.SH "NAME"
struct_tid_ampdu_tx \- TID aggregation information (Tx)\&.
.SH "SYNOPSIS"
.sp
.nf
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;
  bool amsdu;
};  
.fi
.SH "MEMBERS"
.PP
rcu_head
.RS 4
rcu head for freeing structure
.RE
.PP
session_timer
.RS 4
check if we keep Tx\-ing on the TID (by timeout value)
.RE
.PP
addba_resp_timer
.RS 4
timer for peer\*(Aqs response to addba request
.RE
.PP
pending
.RS 4
pending frames queue \-\- use sta\*(Aqs spinlock to protect
.RE
.PP
state
.RS 4
session state (see above)
.RE
.PP
last_tx
.RS 4
jiffies of last tx activity
.RE
.PP
timeout
.RS 4
session timeout value to be filled in ADDBA requests
.RE
.PP
dialog_token
.RS 4
dialog token for aggregation session
.RE
.PP
stop_initiator
.RS 4
initiator of a session stop
.RE
.PP
tx_stop
.RS 4
TX DelBA frame when stopping
.RE
.PP
buf_size
.RS 4
reorder buffer size at receiver
.RE
.PP
failed_bar_ssn
.RS 4
ssn of the last failed BAR tx attempt
.RE
.PP
bar_pending
.RS 4
BAR needs to be re\-sent
.RE
.PP
amsdu
.RS 4
support A\-MSDU withing A\-MDPU
.RE
.SH "DESCRIPTION"
.PP
This structure\*(Aqs lifetime is managed by RCU, assignments to the array holding it must hold the aggregation mutex\&.
.PP
The TX path can access it under RCU lock\-free if, and only if, the state has the flag
\fBHT_AGG_STATE_OPERATIONAL\fR
set\&. Otherwise, the TX path must also acquire the spinlock and re\-check the state, see comments in the tx code touching it\&.
.SH "AUTHOR"
.PP
\fBJohannes Berg\fR <\&johannes@sipsolutions.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br