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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_metadata</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="re204.html" title="journal_dirty_data" /><link rel="next" href="re206.html" title="journal_forget" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>journal_dirty_metadata</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re204.html">Prev</a> </td><th width="60%" align="center">Transasction Level</th><td width="20%" align="right"> <a accesskey="n" href="re206.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="journal_dirty_metadata"><a id="API-journal-dirty-metadata"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>journal_dirty_metadata —
mark a buffer as containing dirty metadata
</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_metadata </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="id3035665"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>handle</code></em></span></dt><dd><p>
transaction to add buffer to.
</p></dd><dt><span class="term"><em class="parameter"><code>bh</code></em></span></dt><dd><p>
buffer to mark
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3035708"></a><h2>Description</h2><p>
Mark dirty metadata which needs to be journaled as part of the current
transaction.
</p><p>
The buffer is placed on the transaction's metadata list and is marked
as belonging to the transaction.
</p><p>
Returns error number or 0 on success.
</p><p>
Special care needs to be taken if the buffer already belongs to the
current committing transaction (in which case we should have frozen
data present for that commit). In that case, we don't relink the
</p></div><div class="refsect1" title="buffer"><a id="id3035733"></a><h2>buffer</h2><p>
that only gets done when the old transaction finally
completes its commit.
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