'\" t
.\"     Title: struct tid_ampdu_rx
.\"    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_RX" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Internals"
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.SH "NAME"
struct_tid_ampdu_rx \- TID aggregation information (Rx)\&.
.SH "SYNOPSIS"
.sp
.nf
struct tid_ampdu_rx {
  struct rcu_head rcu_head;
  spinlock_t reorder_lock;
  u64 reorder_buf_filtered;
  struct sk_buff_head * 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;
  bool auto_seq;
  bool removed;
};  
.fi
.SH "MEMBERS"
.PP
rcu_head
.RS 4
RCU head used for freeing this struct
.RE
.PP
reorder_lock
.RS 4
serializes access to reorder buffer, see below\&.
.RE
.PP
reorder_buf_filtered
.RS 4
bitmap indicating where there are filtered frames in the reorder buffer that should be ignored when releasing frames
.RE
.PP
reorder_buf
.RS 4
buffer to reorder incoming aggregated MPDUs\&. An MPDU may be an A\-MSDU with individually reported subframes\&.
.RE
.PP
reorder_time
.RS 4
jiffies when skb was added
.RE
.PP
session_timer
.RS 4
check if peer keeps Tx\-ing on the TID (by timeout value)
.RE
.PP
reorder_timer
.RS 4
releases expired frames from the reorder buffer\&.
.RE
.PP
last_rx
.RS 4
jiffies of last rx activity
.RE
.PP
head_seq_num
.RS 4
head sequence number in reordering buffer\&.
.RE
.PP
stored_mpdu_num
.RS 4
number of MPDUs in reordering buffer
.RE
.PP
ssn
.RS 4
Starting Sequence Number expected to be aggregated\&.
.RE
.PP
buf_size
.RS 4
buffer size for incoming A\-MPDUs
.RE
.PP
timeout
.RS 4
reset timer value (in TUs)\&.
.RE
.PP
dialog_token
.RS 4
dialog token for aggregation session
.RE
.PP
auto_seq
.RS 4
used for offloaded BA sessions to automatically pick head_seq_and and ssn\&.
.RE
.PP
removed
.RS 4
this session is removed (but might have been found due to RCU)
.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
\fIreorder_lock\fR
is used to protect the members of this struct, except for
\fItimeout\fR,
\fIbuf_size\fR
and
\fIdialog_token\fR, which are constant across the lifetime of the struct (the dialog token being used only for debugging)\&.
.SH "AUTHOR"
.PP
\fBJohannes Berg\fR <\&johannes@sipsolutions.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br