<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>debugfs_create_file</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /><link rel="home" href="index.html" title="Linux Filesystems API" /><link rel="up" href="debugfs.html#debugfs_interface" title="debugfs interface" /><link rel="prev" href="debugfs.html" title="Chapter 5. The debugfs filesystem" /><link rel="next" href="API-debugfs-create-dir.html" title="debugfs_create_dir" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>debugfs_create_file</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="debugfs.html">Prev</a> </td><th width="60%" align="center">debugfs interface</th><td width="20%" align="right"> <a accesskey="n" href="API-debugfs-create-dir.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="debugfs_create_file"><a id="API-debugfs-create-file"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>debugfs_create_file — create a file in the debugfs filesystem </p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">struct dentry * <strong>fsfuncdebugfs_create_file </strong>(</code></td><td>const char * <var class="pdparam">name</var>, </td></tr><tr><td> </td><td>mode_t <var class="pdparam">mode</var>, </td></tr><tr><td> </td><td>struct dentry * <var class="pdparam">parent</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">data</var>, </td></tr><tr><td> </td><td>const struct file_operations * <var class="pdparam">fops</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2766298"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p> a pointer to a string containing the name of the file to create. </p></dd><dt><span class="term"><em class="parameter"><code>mode</code></em></span></dt><dd><p> the permission that the file should have. </p></dd><dt><span class="term"><em class="parameter"><code>parent</code></em></span></dt><dd><p> a pointer to the parent dentry for this file. This should be a directory dentry if set. If this paramater is NULL, then the file will be created in the root of the debugfs filesystem. </p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p> a pointer to something that the caller will want to get to later on. The inode.i_private pointer will point to this value on the <code class="function">open</code> call. </p></dd><dt><span class="term"><em class="parameter"><code>fops</code></em></span></dt><dd><p> a pointer to a struct file_operations that should be used for this file. </p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2766406"></a><h2>Description</h2><p> This is the basic <span class="quote">“<span class="quote">create a file</span>”</span> function for debugfs. It allows for a wide range of flexibility in creating a file, or a directory (if you want to create a directory, the <code class="function">debugfs_create_dir</code> function is recommended to be used instead.) </p><p> This function will return a pointer to a dentry if it succeeds. This pointer must be passed to the <code class="function">debugfs_remove</code> function when the file is to be removed (no automatic cleanup happens if your module is unloaded, you are responsible here.) If an error occurs, <code class="constant">NULL</code> will be returned. </p><p> If debugfs is not enabled in the kernel, the value -<code class="constant">ENODEV</code> will be returned. </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="debugfs.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="debugfs.html#debugfs_interface">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-debugfs-create-dir.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 5. The debugfs filesystem </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>debugfs_create_dir</span></td></tr></table></div></body></html>