1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>vfs_test_lock</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="file_locks.html" title="File Locks"><link rel="prev" href="API-flock-lock-inode-wait.html" title="flock_lock_inode_wait"><link rel="next" href="API-vfs-lock-file.html" title="vfs_lock_file"></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">vfs_test_lock</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-flock-lock-inode-wait.html">Prev</a>&#160;</td><th width="60%" align="center">File Locks</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-vfs-lock-file.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-vfs-test-lock"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_test_lock &#8212; 
2     test file byte range lock
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">int <b class="fsfunc">vfs_test_lock </b>(</code></td><td>struct file * <var class="pdparam">filp</var>, </td></tr><tr><td>&#160;</td><td>struct file_lock * <var class="pdparam">fl</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1102030388"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>filp</code></em></span></dt><dd><p>
4     The file to test lock for
5    </p></dd><dt><span class="term"><em class="parameter"><code>fl</code></em></span></dt><dd><p>
6     The lock to test; also used to hold result
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1102032980"></a><h2>Description</h2><p>
8   Returns -ERRNO on failure.  Indicates presence of conflicting lock by
9   setting conf-&gt;fl_type to something other than F_UNLCK.
10</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-flock-lock-inode-wait.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="file_locks.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-vfs-lock-file.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">flock_lock_inode_wait</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">vfs_lock_file</span></td></tr></table></div></body></html>
11