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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>journal_dirty_data</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Filesystems API" /><link rel="up" href="ch05s03.html#transaction_level" title="Transasction Level" /><link rel="prev" href="re203.html" title="journal_get_undo_access" /><link rel="next" href="re205.html" title="journal_dirty_metadata" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>journal_dirty_data</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re203.html">Prev</a> </td><th width="60%" align="center">Transasction Level</th><td width="20%" align="right"> <a accesskey="n" href="re205.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="journal_dirty_data"><a id="API-journal-dirty-data"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>journal_dirty_data —
mark a buffer as containing dirty data to be flushed
</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">int <b class="fsfunc">journal_dirty_data </b>(</code></td><td>handle_t * <var class="pdparam">handle</var>, </td></tr><tr><td> </td><td>struct buffer_head * <var class="pdparam">bh</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3035506"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>handle</code></em></span></dt><dd><p>
transaction
</p></dd><dt><span class="term"><em class="parameter"><code>bh</code></em></span></dt><dd><p>
bufferhead to mark
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3035549"></a><h2>Description</h2><p>
Mark a buffer as containing dirty data which needs to be flushed before
we can commit the current transaction.
</p><p>
The buffer is placed on the transaction's data list and is marked as
belonging to the transaction.
</p><p>
Returns error number or 0 on success.
</p><p>
<code class="function">journal_dirty_data</code> can be called via page_launder->ext3_writepage
by kswapd.
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