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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>struct tid_ampdu_tx</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /><link rel="home" href="index.html" title="The 802.11 subsystems – for kernel developers" /><link rel="up" href="aggregation-internals.html" title="Chapter 23. Aggregation" /><link rel="prev" href="API-struct-sta-ampdu-mlme.html" title="struct sta_ampdu_mlme" /><link rel="next" href="API-struct-tid-ampdu-rx.html" title="struct tid_ampdu_rx" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>struct tid_ampdu_tx</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-struct-sta-ampdu-mlme.html">Prev</a> </td><th width="60%" align="center">Chapter 23. Aggregation</th><td width="20%" align="right"> <a accesskey="n" href="API-struct-tid-ampdu-rx.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="struct tid_ampdu_tx"><a id="API-struct-tid-ampdu-tx"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct tid_ampdu_tx —
TID aggregation information (Tx).
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
struct tid_ampdu_tx {
struct rcu_head rcu_head;
struct timer_list addba_resp_timer;
struct sk_buff_head pending;
unsigned long state;
u16 timeout;
u8 dialog_token;
u8 stop_initiator;
bool tx_stop;
}; </pre></div><div class="refsect1" title="Members"><a id="id3060870"></a><h2>Members</h2><div class="variablelist"><dl><dt><span class="term">rcu_head</span></dt><dd><p>
rcu head for freeing structure
</p></dd><dt><span class="term">addba_resp_timer</span></dt><dd><p>
timer for peer's response to addba request
</p></dd><dt><span class="term">pending</span></dt><dd><p>
pending frames queue -- use sta's spinlock to protect
</p></dd><dt><span class="term">state</span></dt><dd><p>
session state (see above)
</p></dd><dt><span class="term">timeout</span></dt><dd><p>
session timeout value to be filled in ADDBA requests
</p></dd><dt><span class="term">dialog_token</span></dt><dd><p>
dialog token for aggregation session
</p></dd><dt><span class="term">stop_initiator</span></dt><dd><p>
initiator of a session stop
</p></dd><dt><span class="term">tx_stop</span></dt><dd><p>
TX DelBA frame when stopping
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3060975"></a><h2>Description</h2><p>
This structure's lifetime is managed by RCU, assignments to
the array holding it must hold the aggregation mutex.
</p><p>
The TX path can access it under RCU lock-free if, and
only if, the state has the flag <code class="constant">HT_AGG_STATE_OPERATIONAL</code>
set. Otherwise, the TX path must also acquire the spinlock
and re-check the state, see comments in the tx code
touching it.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-struct-sta-ampdu-mlme.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="aggregation-internals.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-struct-tid-ampdu-rx.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>struct sta_ampdu_mlme</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>struct tid_ampdu_rx</span></td></tr></table></div></body></html>
