<div dir="ltr"><div>&gt;&gt; I am developing a user space program which interacts with &quot;file system&quot;<br><a href="https://www.kernel.org/doc/htmldocs/filesystems/index.html">https://www.kernel.org/doc/htmldocs/filesystems/index.html</a><br><br>&gt; and &quot;cryptography&quot;<br><a href="https://www.kernel.org/doc/htmldocs/crypto-API/index.html">https://www.kernel.org/doc/htmldocs/crypto-API/index.html</a><br><br></div>The best documentation IS right there in the kernel source :) <br></div>