1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>vfs_unlink</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="other_functions.html" title="Other Functions"><link rel="prev" href="API-lookup-one-len.html" title="lookup_one_len"><link rel="next" href="API-vfs-link.html" title="vfs_link"></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_unlink</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-lookup-one-len.html">Prev</a>&#160;</td><th width="60%" align="center">Other Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-vfs-link.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-vfs-unlink"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_unlink &#8212; 
2     unlink a filesystem object
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_unlink </b>(</code></td><td>struct inode * <var class="pdparam">dir</var>, </td></tr><tr><td>&#160;</td><td>struct dentry * <var class="pdparam">dentry</var>, </td></tr><tr><td>&#160;</td><td>struct inode ** <var class="pdparam">delegated_inode</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1102208588"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dir</code></em></span></dt><dd><p>
4     parent directory
5    </p></dd><dt><span class="term"><em class="parameter"><code>dentry</code></em></span></dt><dd><p>
6     victim
7    </p></dd><dt><span class="term"><em class="parameter"><code>delegated_inode</code></em></span></dt><dd><p>
8     returns victim inode, if the inode is delegated.
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1102212244"></a><h2>Description</h2><p>
10   The caller must hold dir-&gt;i_mutex.
11   </p><p>
12
13   If vfs_unlink discovers a delegation, it will return -EWOULDBLOCK and
14   return a reference to the inode in delegated_inode.  The caller
15   should then break the delegation on that inode and retry.  Because
16   breaking a delegation may take a long time, the caller should drop
17   dir-&gt;i_mutex before doing so.
18   </p><p>
19
20   Alternatively, a caller may pass NULL for delegated_inode.  This may
21   be appropriate for callers that expect the underlying filesystem not
22   to be NFS exported.
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