1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>truncate_setsize</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ch04s03.html" title="More Memory Management Functions"><link rel="prev" href="API-truncate-pagecache.html" title="truncate_pagecache"><link rel="next" href="API-pagecache-isize-extended.html" title="pagecache_isize_extended"></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">truncate_setsize</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-truncate-pagecache.html">Prev</a>&#160;</td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-pagecache-isize-extended.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-truncate-setsize"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>truncate_setsize &#8212; 
2     update inode and pagecache for a new file size
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">truncate_setsize </b>(</code></td><td>struct inode * <var class="pdparam">inode</var>, </td></tr><tr><td>&#160;</td><td>loff_t <var class="pdparam">newsize</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124906660"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>inode</code></em></span></dt><dd><p>
4     inode
5    </p></dd><dt><span class="term"><em class="parameter"><code>newsize</code></em></span></dt><dd><p>
6     new file size
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124909276"></a><h2>Description</h2><p>
8   truncate_setsize updates i_size and performs pagecache truncation (if
9   necessary) to <em class="parameter"><code>newsize</code></em>. It will be typically be called from the filesystem's
10   setattr function when ATTR_SIZE is passed in.
11   </p><p>
12
13   Must be called with a lock serializing truncates and writes (generally
14   i_mutex but e.g. xfs uses a different lock) and before all filesystem
15   specific block truncation has been performed.
16</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-truncate-pagecache.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch04s03.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-pagecache-isize-extended.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">truncate_pagecache</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">pagecache_isize_extended</span></td></tr></table></div></body></html>
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