debugfs

<h2 id="use">Use</h2>
<p>To compile a Linux kernel with the debugfs facility, the CONFIG_DEBUG_FS option must be set to yes.  It is typically mounted at /sys/kernel/debug with a command such as:<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a>
</p>
mount -t debugfs none /sys/kernel/debug

<p>It can be manipulated using several calls from the C <a href="/facts/Header_file/fg3KEG4V">header file</a> linux/debugfs.h, which include:
</p>
<ul><li>debugfs_create_file –  for creating a file in the debug filesystem.</li>
<li>debugfs_create_dir –  for creating a directory inside the debug filesystem.</li>
<li>debugfs_create_symlink –  for creating a symbolic link inside the debug filesystem.</li>
<li>debugfs_remove –  for removing a debugfs entry from the debug filesystem.</li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://lwn.net/Articles/334546/">An updated guide to debugfs</a> at <a href="/facts/LWN.net/8uTsltvM">LWN</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Linux: DebugFS Archived 2010-02-01 at the Wayback Machine, by Jeremy, December 11, 2004, KernelTrap. (Announcement of debugfs by Greg KH.) <a href="http://kerneltrap.org/node/4394" target="_blank">http://kerneltrap.org/node/4394</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"Debugfs". LWN.net. 2004-12-13. <a href="https://lwn.net/Articles/115405/" target="_blank">https://lwn.net/Articles/115405/</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>Linux Kernel Documentation :: filesystems : debugfs.txt documentation from the source code (Based on kernel version 2.6.35.4. Page generated on 2010-09-02 21:39 EST.) <a href="http://www.mjmwired.net/kernel/Documentation/filesystems/debugfs.txt" target="_blank">http://www.mjmwired.net/kernel/Documentation/filesystems/debugfs.txt</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>An updated guide to debugfs, By Jonathan Corbet, May 25, 2009, LWN <a href="https://lwn.net/Articles/334546/" target="_blank">https://lwn.net/Articles/334546/</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
<li id="fn:5"><p>2.5 Debugfs A guide to using debugfs, Ariane Keller, Version 0.8, July 2008, Kernel Space - User Space Interfaces <a href="https://web.archive.org/web/20160105144119/http://people.ee.ethz.ch/~arkeller/linux/kernel_user_space_howto.html#ss2.5" target="_blank">https://web.archive.org/web/20160105144119/http://people.ee.ethz.ch/~arkeller/linux/kernel_user_space_howto.html#ss2.5</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li>
</ol>

debugfs open-in-new

debugfs