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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>__generic_file_aio_write</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux Kernel API" /><link rel="up" href="ch04s03.html" title="More Memory Management Functions" /><link rel="prev" href="re173.html" title="read_cache_page" /><link rel="next" href="re175.html" title="generic_file_aio_write" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>__generic_file_aio_write</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re173.html">Prev</a> </td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right"> <a accesskey="n" href="re175.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="__generic_file_aio_write"><a id="API---generic-file-aio-write"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__generic_file_aio_write —
write data to a file
</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">ssize_t <b class="fsfunc">__generic_file_aio_write </b>(</code></td><td>struct kiocb * <var class="pdparam">iocb</var>, </td></tr><tr><td> </td><td>const struct iovec * <var class="pdparam">iov</var>, </td></tr><tr><td> </td><td>unsigned long <var class="pdparam">nr_segs</var>, </td></tr><tr><td> </td><td>loff_t * <var class="pdparam">ppos</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2644471"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>iocb</code></em></span></dt><dd><p>
IO state structure (file, offset, etc.)
</p></dd><dt><span class="term"><em class="parameter"><code>iov</code></em></span></dt><dd><p>
vector with data to write
</p></dd><dt><span class="term"><em class="parameter"><code>nr_segs</code></em></span></dt><dd><p>
number of segments in the vector
</p></dd><dt><span class="term"><em class="parameter"><code>ppos</code></em></span></dt><dd><p>
position where to write
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2644549"></a><h2>Description</h2><p>
This function does all the work needed for actually writing data to a
file. It does all basic checks, removes SUID from the file, updates
modification times and calls proper subroutines depending on whether we
do direct IO or a standard buffered write.
</p><p>
It expects i_mutex to be grabbed unless we work on a block device or similar
object which does not need locking at all.
</p><p>
This function does *not* take care of syncing data in case of O_SYNC write.
A caller has to handle it. This is mainly due to the fact that we want to
avoid syncing under i_mutex.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re173.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04s03.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re175.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>read_cache_page</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>generic_file_aio_write</span></td></tr></table></div></body></html>
