1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_vma_node_allow</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="drm-memory-management.html#idp1122718668" title="VMA Offset Manager"><link rel="prev" href="API-drm-vma-offset-remove.html" title="drm_vma_offset_remove"><link rel="next" href="API-drm-vma-node-revoke.html" title="drm_vma_node_revoke"></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">drm_vma_node_allow</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-vma-offset-remove.html">Prev</a>&#160;</td><th width="60%" align="center">VMA Offset Manager</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-vma-node-revoke.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-vma-node-allow"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_vma_node_allow &#8212; 
2     Add open-file to list of allowed users
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">drm_vma_node_allow </b>(</code></td><td>struct drm_vma_offset_node * <var class="pdparam">node</var>, </td></tr><tr><td>&#160;</td><td>struct file * <var class="pdparam">filp</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1122788948"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>node</code></em></span></dt><dd><p>
4     Node to modify
5    </p></dd><dt><span class="term"><em class="parameter"><code>filp</code></em></span></dt><dd><p>
6     Open file to add
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1122791428"></a><h2>Description</h2><p>
8   Add <em class="parameter"><code>filp</code></em> to the list of allowed open-files for this node. If <em class="parameter"><code>filp</code></em> is
9   already on this list, the ref-count is incremented.
10   </p><p>
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12   The list of allowed-users is preserved across <code class="function">drm_vma_offset_add</code> and
13   <code class="function">drm_vma_offset_remove</code> calls. You may even call it if the node is currently
14   not added to any offset-manager.
15   </p><p>
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17   You must remove all open-files the same number of times as you added them
18   before destroying the node. Otherwise, you will leak memory.
19   </p><p>
20
21   This is locked against concurrent access internally.
22</p></div><div class="refsect1"><a name="idp1122794148"></a><h2>RETURNS</h2><p>
23   0 on success, negative error code on internal failure (out-of-mem)
24</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-drm-vma-offset-remove.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="drm-memory-management.html#idp1122718668">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-drm-vma-node-revoke.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_vma_offset_remove</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">drm_vma_node_revoke</span></td></tr></table></div></body></html>
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