<h2>Editing File: /opt/rh/gcc-toolset-11/root/usr/share/systemtap/examples/io/enospc.stp</h2><form method='post'><textarea name='content' class='file-edit'>#!/opt/rh/gcc-toolset-11/root/usr/bin/stap

// Enospc notification script
// Copyright (C) 2012 Red Hat Inc., Lukas Czerner &lt;lczerner@redhat.com&gt;
//
// This file is part of systemtap, and is free software.  You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.

// This tapset is used to watch for ENOSPC on file system operation, print
// notification and send message to the syslog using logger. Supported file
// systems so far are ext3, ext4, xfs and btrfs


/*
 * Print the warning message to the stdout and send it
 * to the syslog via logger.
 */
function warnlog(fsname:string, dev:long) {
	message = sprintf(&quot;%s (%d, %d) - no space left on the file system (uid: %d, %s:%d)\n&quot;,
			   fsname, MAJOR(dev), MINOR(dev), uid(), execname(), pid());
	/* Print the message to the output */
	printf(&quot;[%s]: %s&quot;, ctime(gettimeofday_s()), message);
	/* Log the message with logger */
	command = sprintf(&quot;/usr/bin/logger '%s'&quot;, message);
	system(command);
}

/* Catch ENOSPC in ext4 file system */
probe {kernel,module(&quot;ext4&quot;)}.function(&quot;ext4_should_retry_alloc&quot;).return ?
{
	if (0 == $return)
          warnlog(&quot;ext4&quot;, @entry($sb-&gt;s_dev));
}

/* Catch ENOSPC in ext3 file system */
probe {kernel,module(&quot;ext3&quot;)}.function(&quot;ext3_should_retry_alloc&quot;).return ?
{
	if (0 == $return)
          warnlog(&quot;ext3&quot;, @entry($sb-&gt;s_dev));
}

/* Catch ENOSPC in xfs file system on write */
probe {kernel,module(&quot;xfs&quot;)}.function(&quot;xfs_file_aio_write&quot;).return ?
{
	if (-28 == $return)
          warnlog(&quot;xfs&quot;, @entry($iocb-&gt;ki_filp-&gt;f_mapping-&gt;host-&gt;i_sb-&gt;s_dev));
}

/* Catch ENOSPC in xfs file system on inode creation */
probe {kernel,module(&quot;xfs&quot;)}.function(&quot;xfs_vn_mknod&quot;).return ?
{
	if (-28 == $return)
          warnlog(&quot;xfs&quot;, @entry($dir-&gt;i_sb-&gt;s_dev));
}

/* Catch ENOSPC in xfs file system on fallocate */
probe {kernel,module(&quot;xfs&quot;)}.function(&quot;xfs_vn_fallocate&quot;).return ?
{
	if (-28 == $return)
          warnlog(&quot;xfs&quot;, @entry($inode-&gt;i_sb-&gt;s_dev));
}

/* Catch ENOSPC in btrfs file system */
probe {kernel,module(&quot;btrfs&quot;)}.function(&quot;btrfs_check_data_free_space&quot;).return ?
{
	if (-28 == $return)
          warnlog(&quot;btrfs&quot;, (@defined(@entry($inode-&gt;root))?
			    @entry($inode-&gt;root-&gt;fs_info-&gt;sb-&gt;s_dev):
			    @entry($inode-&gt;i_sb-&gt;s_dev)));
}
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