1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>struct pipe_inode_info</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Filesystems API"><link rel="up" href="pipes.html" title="Chapter 8. pipes API"><link rel="prev" href="API-struct-pipe-buffer.html" title="struct pipe_buffer"><link rel="next" href="API-generic-pipe-buf-steal.html" title="generic_pipe_buf_steal"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">struct pipe_inode_info</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-struct-pipe-buffer.html">Prev</a> </td><th width="60%" align="center">Chapter 8. pipes API</th><td width="20%" align="right"> <a accesskey="n" href="API-generic-pipe-buf-steal.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-struct-pipe-inode-info"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct pipe_inode_info — 2 a linux kernel pipe 3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting"> 4struct pipe_inode_info { 5 struct mutex mutex; 6 wait_queue_head_t wait; 7 unsigned int nrbufs; 8 unsigned int curbuf; 9 unsigned int buffers; 10 unsigned int readers; 11 unsigned int writers; 12 unsigned int files; 13 unsigned int waiting_writers; 14 unsigned int r_counter; 15 unsigned int w_counter; 16 struct page * tmp_page; 17 struct fasync_struct * fasync_readers; 18 struct fasync_struct * fasync_writers; 19 struct pipe_buffer * bufs; 20}; </pre></div><div class="refsect1"><a name="idp1104132868"></a><h2>Members</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">mutex</span></dt><dd><p> 21 mutex protecting the whole thing 22 </p></dd><dt><span class="term">wait</span></dt><dd><p> 23 reader/writer wait point in case of empty/full pipe 24 </p></dd><dt><span class="term">nrbufs</span></dt><dd><p> 25 the number of non-empty pipe buffers in this pipe 26 </p></dd><dt><span class="term">curbuf</span></dt><dd><p> 27 the current pipe buffer entry 28 </p></dd><dt><span class="term">buffers</span></dt><dd><p> 29 total number of buffers (should be a power of 2) 30 </p></dd><dt><span class="term">readers</span></dt><dd><p> 31 number of current readers of this pipe 32 </p></dd><dt><span class="term">writers</span></dt><dd><p> 33 number of current writers of this pipe 34 </p></dd><dt><span class="term">files</span></dt><dd><p> 35 number of struct file referring this pipe (protected by ->i_lock) 36 </p></dd><dt><span class="term">waiting_writers</span></dt><dd><p> 37 number of writers blocked waiting for room 38 </p></dd><dt><span class="term">r_counter</span></dt><dd><p> 39 reader counter 40 </p></dd><dt><span class="term">w_counter</span></dt><dd><p> 41 writer counter 42 </p></dd><dt><span class="term">tmp_page</span></dt><dd><p> 43 cached released page 44 </p></dd><dt><span class="term">fasync_readers</span></dt><dd><p> 45 reader side fasync 46 </p></dd><dt><span class="term">fasync_writers</span></dt><dd><p> 47 writer side fasync 48 </p></dd><dt><span class="term">bufs</span></dt><dd><p> 49 the circular array of pipe buffers 50 </p></dd></dl></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-struct-pipe-buffer.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="pipes.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-generic-pipe-buf-steal.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">struct pipe_buffer</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">generic_pipe_buf_steal</span></td></tr></table></div></body></html> 51