1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>journal_start</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Filesystems API"><link rel="up" href="functions.html#transaction_level" title="Transasction Level"><link rel="prev" href="API-journal-skip-recovery.html" title="journal_skip_recovery"><link rel="next" href="API-journal-extend.html" title="journal_extend"></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">journal_start</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-journal-skip-recovery.html">Prev</a>&#160;</td><th width="60%" align="center">Transasction Level</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-journal-extend.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-journal-start"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>journal_start &#8212; 
2  Obtain a new handle.
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">handle_t * <b class="fsfunc">journal_start </b>(</code></td><td>journal_t * <var class="pdparam">journal</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">nblocks</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1103837524"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>journal</code></em></span></dt><dd><p>
4     Journal to start transaction on.
5    </p></dd><dt><span class="term"><em class="parameter"><code>nblocks</code></em></span></dt><dd><p>
6     number of block buffer we might modify
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1103840188"></a><h2>Description</h2><p>
8   We make sure that the transaction can guarantee at least nblocks of
9   modified buffers in the log.  We block until the log can guarantee
10   that much space.
11   </p><p>
12
13   This function is visible to journal users (like ext3fs), so is not
14   called with the journal already locked.
15   </p><p>
16
17   Return a pointer to a newly allocated handle, or an <code class="function">ERR_PTR</code> value
18   on failure.
19</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-journal-skip-recovery.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="functions.html#transaction_level">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-journal-extend.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">journal_skip_recovery</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">journal_extend</span></td></tr></table></div></body></html>
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